Electric control unit integrated with a hydraulic unit in an anti-lock brake system

A connecting structure for connecting the connector terminal unit with the printed mounting board in which the degree of freedom is high with respect to the attaching posture and attaching position of the connector terminal unit, and further the error allowed in the manufacturing process of the printed mounting board and the error allowed in the assembling process of the printed mounting board to the case may be increased. An auxiliary wiring board is electrically connected onto a reverse side of a connector terminal arranged penetrating the connector terminal unit, and also the auxiliary wiring board is electrically connected onto the printed mounting board by FPC (flexible printed circuit board). The attaching posture and attaching position of the connector terminal unit can be arbitrarily determined in a range of the length of FPC. Therefore, the degree of freedom of the attaching posture and attaching position of the connector terminal unit can be enhanced, and further the error allowed in the manufacturing process of the printed mounting board and the error allowed in the assembling process of the printed mounting board to the case may be increased.

BACKGROUND OF THE INVENTION 
The present invention relates to a connecting structure for connecting a 
wiring board arranged at a predetermined position in a case of an 
electronic unit used for a vehicle, electrical equipment and office 
automation device, with a connector terminal unit arranged in a connector 
housing of the case under the condition that a reverse side of the 
connector terminal unit is directed to the inside of the case. Also, the 
present invention relates to an assembling method thereof. 
More particularly, the present invention relates to an electronic control 
unit integrated with a hydraulic unit in an anti-lock brake system of a 
vehicle which prevents wheels of the vehicle from locking in the case of 
applying a sudden brake or applying a brake when the vehicle is running on 
a slippery road, by adjusting the pressure of brake fluid. 
In general, in the electronic unit used for a vehicle, electrical equipment 
and office automation device, there is provided a connector terminal unit 
for electrically connecting a printed mounting board arranged in the 
electronic unit with an electrical device arranged outside the electronic 
unit. 
The conventional connecting structure for connecting the connector terminal 
unit with the printed mounting board is shown in FIGS. 1 and 2, which will 
be described as follows. The connecting structure includes: a printed 
mounting board 201a, 201b accommodated at a predetermined position in an 
electronic unit case 200a, 200b; and a connector terminal unit 203a, 203b 
accommodated in a connector housing 202a, 202b in the electronic unit case 
200a, 200b. In the connector terminal unit 203a, 203b, there are provided 
a plurality of connector terminals 204a, 204b which penetrate the 
connector terminal unit. 
On a reverse side of the printed mounting board 201a, 210b, there is 
provided a printed wiring pattern (not shown in the drawings) made of 
copper foil, and also electronic parts (not shown in the drawings) are 
mounted, and an appropriate electrical circuit is composed. A connector 
terminal 204a, 204b is arranged in the connector terminal unit 203a, 203b 
in such a manner that the connector terminal penetrates the connector 
terminal unit from the front side facing the outside of the connector 
terminal unit 203a, 203b to the reverse side facing the inside of the 
electronic unit case 200a, 200b. On the front side, an end of the 
connector terminal 204a, 204b is exposed to the outside so that an 
external connector (not shown in the drawings) can be connected. On the 
reverse side, the other end of the connector terminal 204a, 204b is 
extended straight or in an L-shape, and the end portion of the connector 
terminal 204a, 204b is formed into a terminal portion 205a, 205b. This 
terminal portion 205a, 205b is inserted into and soldered with a 
through-hole (not shown in the drawings) formed on the printed mounting 
board 201a, 201b. In this way, the connector terminal 204a, 204b is 
electrically connected with the printed mounting board 201a, 201b. 
In this connection, in the above connecting structure in which the 
connector terminal unit 203a, 203b is connected with the printed mounting 
board 201a, 201b, the terminal portion 205a, 205b is inserted into the 
through-hole substantially perpendicular to the surface of the printed 
mounting board 201a, 201b. 
Accordingly, in the case where the connector housing 202a is open upward 
with respect to the electronic unit case 200a as shown in FIG. 1, the 
connector terminals 204a are formed straight, and the terminal portion 
205a can be inserted into the through-holes while the terminal portion 
205a is maintained substantially perpendicular to the printed mounting 
board 201a. In the case where the connector housing 202b is open onto the 
side of the electronic unit case 200b as shown in FIG. 2, the connector 
terminals 204a are bent into L-shapes on the reverse side of the connector 
terminal unit 203b, and then the terminal portion 205b can be inserted 
into the through-holes while the terminal portion 205b is maintained 
substantially perpendicular to the printed mounting board 201b. 
As described above, in the conventional connecting structure, it is 
necessary to appropriately change the shapes of the connector terminals 
204a, 204b in accordance with the position and posture of the connector 
housing 202a, 202b in which the connector terminal unit 203a, 203b is 
accommodated. Due to the foregoing, the arrangement of the terminal 
portion 205a, 205b of the connector terminals 204a, 204b is changed, and 
it is necessary to appropriately change the positions of the through-holes 
on the printed mounting board 201a, 201b and also to change the printed 
wiring pattern. 
Therefore, for example, when the position and shape of the connector 
housing 202a, 202b are changed under the necessity of changing the design, 
it is necessary to change the design of the connector terminal unit 203a, 
203b and the printed mounting board 201a, 201b. 
Unless the printed mounting board 201a, 201b is manufactured with high 
accuracy and assembled to the electronic unit case 200a, 200b with high 
accuracy, the positions of through-holes formed on the printed mounting 
board 201a, 201b deviate from the predetermined positions, so that the 
connector terminals 204a, 204b extending from the connector terminal unit 
203a, 203b can not penetrate the through-holes. 
Especially when a plurality of connector terminal units are provided in the 
electronic unit, it is necessary to connect all the connector terminals 
with the printed mounting board 201a, 201b. Therefore, the printed 
mounting board 201a, 201b must be manufactured more accurately and 
assembled to the electronic unit case 200a, 200b with higher accuracy. 
The following are descriptions of the electronic control unit integrated 
with a hydraulic unit in a conventional anti-lock brake system of a 
vehicle. 
For example, as one of the systems by which safety can be enhanced in the 
driving of an automobile, there is provided an anti-lock brake system by 
which wheels of an automobile are prevented from locking when a sudden 
brake is applied to the automobile or when the automobile is given a brake 
in the running on a slippery road. Recently, with the progress of 
technology, performance of the automobile is highly enhanced. In order to 
enhance the performance, a large number of automobiles are equipped with 
the anti-lock brake systems described above. 
This type anti-lock brake system includes: a rotation detecting device for 
detecting the rotation of each wheel; an electronic control section for 
controlling the pressure of brake fluid so that the wheel can not lock; 
and a hydraulic unit for adjusting the pressure of brake fluid of each 
wheel in accordance with a control signal sent from the electronic control 
section. 
A detection signal sent from the rotation detecting device is inputted into 
the electronic control section. According to this detection signal, it is 
monitored whether or not wheels are locked when the brake is applied. When 
it is judged that the wheels are locked in the process of braking, the 
hydraulic unit is controlled, and the pressure of brake fluid of the wheel 
cylinder of the wheel concerned is reduced. When it is judged that there 
is no possibility of locking, the pressure of brake fluid of the wheel is 
raised again. 
Also, there is provided an electronic control unit integrated with a 
hydraulic unit in an anti-lock brake system in which the integrated 
electronic control unit and hydraulic unit are arranged in an engine room, 
so that the cabin space can be increased and the harness work can be 
simplified. 
For example, this type anti-lock brake system is disclosed in Japanese 
Unexamined Patent Publication No. 6-239217. In order to effectively 
utilize the space in an automobile and simplify the harness work, as shown 
in FIGS. 3 and 4, the above Unexamined Patent Publication discloses an 
electronic control unit integrated with a hydraulic unit including: an 
electronic control unit 301 provided with an electronic control section 
304 for controlling the pressure of brake fluid so that each wheel of the 
automobile is not locked; and a hydraulic unit 302 for adjusting the 
pressure of brake fluid of each wheel in accordance with a control signal 
sent from the electronic control section 304. 
The above electronic control unit 301 includes: a printed wiring board 321 
which forms an electronic control section 304 for controlling the pressure 
of brake fluid in accordance with the signals sent from rotation detecting 
devices 303a to 303d to detect the rotation of each wheel of the 
automobile so that each wheel can not be locked; a motor relay 307 for 
controlling a motor 306, which will be described later, in accordance with 
the control signal sent from the electronic control section 304; and a 
fail-safe relay 308 for stopping the operation of the system when a 
problem has occurred in the anti-lock brake system. 
The hydraulic unit 302 is integrally attached to an upper portion of the 
electronic control unit 301 by a bracket 310. The hydraulic unit 302 is 
provided with solenoid valves 305a to 305d. The solenoid valves 305a to 
305d are controlled to be opened and closed in accordance with a control 
signal sent from the electronic control section 304, so that the pressure 
of brake fluid given to the wheel cylinder of each wheel (not shown) is 
controlled. On a side of the case 302a of the hydraulic unit 302, there is 
provided a motor 306 for driving a pump not shown in accordance with the 
control signal so as to return the brake fluid to the master cylinder. 
In the above electronic control unit integrated with a hydraulic unit, 
there is provided a battery 310 used as an electrical power source of the 
anti-lock brake system of the automobile. The power circuit in which 
electrical power is supplied from the battery 310 to the motor 306 via the 
motor relay 307 is composed of a wiring pattern provided on the printed 
wiring board 321 accommodated in the case 301a. 
An electrical current flows from the battery 310 to the motor 306 as 
follows. The electrical current is supplied from the battery 310 to the 
wiring pattern on the printed wiring board 321 via the connector 320 
(shown in FIG. 4) provided on the case 301a of the electronic control unit 
301. Then the electrical current flows in a contact portion of the motor 
relay 307 attached onto the printed wiring board 321. After that, the 
electrical current flows again in the wiring pattern on the printed wiring 
board 321 and is supplied to the motor 306 disposed in an upper portion of 
the electronic control unit 301 via a lead wire (not shown). 
In FIG. 4, reference numeral 311 is an ignition switch, reference numeral 
312 is a stop lamp switch disposed close to a brake pedal, reference 
numeral 313 is a stop lamp composing a portion of the rear lamp, reference 
numeral 314 is a warning lamp for telling the occurrence of an 
abnormality, and reference numeral 315 is a diode for turning on the 
warning lamp 314. 
However, when the electronic control unit integrated with a hydraulic unit 
is arranged in an engine room as disclosed in the patent publication 
described before, it is necessary to provide a relatively large space for 
installing the electronic control unit integrated with a hydraulic unit in 
the engine room. 
However, according to the electronic control unit integrated with a 
hydraulic unit disclosed in the publication described before, a male 
connecting terminal of each solenoid valve provided in the hydraulic unit 
protrudes downward from a lower face of the hydraulic housing, and a 
corresponding female connecting terminal is provided in the electronic 
control unit. Therefore, when the hydraulic unit is integrally connected 
with the electronic control unit, each male connecting terminal on the 
solenoid valve side and each female connecting terminal on the electronic 
control unit side are connected with each other. 
Therefore, in the process of quality control or transportation of the 
hydraulic unit before it is assembled to the electronic control unit, the 
male connecting terminals directly protruding from a lower face of the 
hydraulic housing come into contact or collide with other parts. That is, 
there is a possibility that the male connecting terminals are damaged by 
the contact or collision. 
In the above electronic control unit integrated with a hydraulic unit, the 
electrical power circuit of the motor 306 is composed of a printed wiring 
pattern provided on the printed wiring board 321 in the electronic control 
unit 301. Therefore, a high intensity of electrical current, for example, 
an electrical current, the intensity of which is not less than 40 A, flows 
on the printed wiring board 321 for driving the motor. In general, the 
electrical current capacity of the printed wiring pattern is small. 
Accordingly, there is a possibility that an over-current flows in the 
printed wiring pattern and the breaking of wire is caused. 
However, in the electronic control unit integrated with a hydraulic unit 
disclosed in the patent publication described before, a large number of 
electrical wires such as a signal wire connected with the rotation 
detecting device provided in each wheel, an electrical power source wire 
and an earth wire must be connected with the electronic control section. 
Therefore, it is necessary to provide a connector terminal unit of a 
relatively large size in the electronic control unit. As a result, the 
size of the electronic control unit is determined by the size of the 
connector terminal unit. In this connection, the connector terminal unit 
is attached to the electronic control unit case in such a manner that 
attaching pieces are provided on two sides of the outer circumference of 
the connector terminal unit being opposed to the main body, and the 
attaching pieces are screwed to the case. Therefore, in addition to a 
space for accommodating the electronic control unit itself, another space 
is required for installing the aforementioned attaching structure of the 
connector terminal unit. Accordingly, the size of the electronic control 
unit integrated with a hydraulic unit is increased. 
When the electronic control unit provided with an electronic control 
section is integrated with the hydraulic unit, the connecting terminals on 
the solenoid valve side protruding downward from a lower face of the 
hydraulic housing of the hydraulic unit and the connecting terminals on 
the motor side must be connected with the corresponding connecting 
terminals on the electronic control unit side. Accordingly, it is 
necessary for the connecting terminals of each unit to be assembled with 
high accuracy. 
SUMMARY OF THE INVENTION 
The present invention has been accomplished to solve the above problems. An 
object of the present invention is to provide a connecting structure for 
connecting a connector terminal unit with a wiring board and also to 
provide assembling method thereof characterized in that: it is possible to 
use a common connector terminal unit and wiring board even if the position 
and posture of a connector housing are changed; and it is possible to 
provide a wide allowable range with respect to the error caused in the 
process of manufacturing a wiring board and the error caused when the 
wiring board is assembled to a case. 
Another object of the present invention is to provide a compact electronic 
control unit integrated with a hydraulic unit in an anti-lock brake 
system. 
Still another object of the present invention is to provide an electronic 
control unit integrated with a hydraulic unit in an anti-lock brake system 
in which the male connecting terminals protruding from the hydraulic 
housing are prevented from being damaged. 
Still another object of the present invention is to provide an electronic 
control unit integrated with a hydraulic unit in an anti-lock brake system 
having a motor power source circuit in which a high intensity of 
electrical current can be made to flow to drive a motor. 
Still another object of the present invention is to provide an electronic 
control unit integrated with a hydraulic unit in an anti-lock brake system 
which can be made compact by reducing the size of the attaching structure 
of the connector terminal unit. 
Still another object of the present invention is to provide an electronic 
control unit integrated with a hydraulic unit in an anti-lock brake system 
in which the assembling accuracy of the electronic control unit is 
enhanced. 
In order to solve the above problems, the present invention is to provide a 
connecting structure for connecting a connector terminal unit with a 
wiring board in which the wiring board accommodated at a predetermined 
position in the case is connected with the connector terminal unit 
accommodated in the connector housing under the condition that a reverse 
side of the connector terminal unit is directed into the case, and the 
connecting structure comprises: an auxiliary wiring board attached onto 
the reverse side of the connector terminal unit, the auxiliary wiring 
board being electrically connected with connector terminals which are 
arranged penetrating the connector terminal unit; and flexible electrical 
wires attached between the wiring board and the auxiliary wiring board, 
wherein the connector terminal unit is electrically connected with the 
wiring board by the auxiliary wiring board. 
According to the connecting structure for connecting the connector terminal 
unit with the wiring board arranged as described above, the connector 
terminals which penetrate the connector unit are electrically connected 
with the wiring board via the flexible electrical wire. Therefore, the 
posture and position of the connector terminal unit can be freely moved 
within a range determined by the length of the flexible electrical wire. 
Further, when the wiring board and the connector terminal unit are 
electrically connected with each other via the flexible electrical wire, 
the relative positions of the wiring board and the connector terminal unit 
can be freely determined. Accordingly, it is possible to electrically 
connect the wiring board with the connector terminal unit irrespective of 
small errors caused in the process of manufacturing the wiring board and 
small errors caused in the process of assembling the wiring board to the 
case. 
An assembling method for assembling the connector terminal unit to a wiring 
board of the present invention, comprises the steps of: integrally forming 
a wiring board and an auxiliary wiring board so that they can be freely 
detached from each other; electrically connecting one end of the flexible 
electrical wire with the wiring board; electrically connecting the other 
end of the flexible electrical wire with the auxiliary wiring board; 
separating the auxiliary wiring board from the wiring board; electrically 
connecting the auxiliary wiring board with the connector terminal 
penetrating the connector terminal unit, by attaching the auxiliary wiring 
board onto a reverse side of the connector terminal unit; accommodating 
the connector terminal unit in the connector housing under the condition 
that the reverse side of the connector terminal unit is directed into the 
case; and accommodating the wiring board at a predetermined position in 
the case. 
According to the above assembling method for assembling the connector 
terminal unit to the wiring board, the wiring board and the auxiliary 
wiring board are integrally formed so that they can be freely separated 
from each other. Therefore, it is easy to form the respective boards. 
Before the boards are separated from each other, the flexible electrical 
wire is connected to each board. Accordingly, the electrical wire 
connection can be easily conducted. 
An electronic control unit integrated with a hydraulic unit in an anti-lock 
brake system of the present invention comprises: a rotation detecting 
device for detecting a rotating condition of each wheel of an automobile; 
a hydraulic unit for controlling the brake fluid pressure in a wheel 
cylinder of each wheel by opening and closing a solenoid valve through a 
solenoid coil in a hydraulic housing in accordance with an electronic 
control signal, the hydraulic unit having a motor to drive a pump for 
returning the brake fluid to a master cylinder; an electronic control unit 
for making the control signal to control the brake fluid pressure in 
accordance with the detection conducted by the rotation detecting device; 
a fail-safe relay for supplying and stopping an electrical power supply to 
a solenoid provided in the electronic control unit and also an electrical 
power supply to a motor relay; and a motor relay for supplying and 
stopping an electrical power supply to the motor, wherein male terminals 
on the solenoid coil side protruding downward from a lower face of the 
hydraulic housing are connected with connecting terminals on the 
electronic control unit side when the hydraulic unit is mechanically 
connected with the electronic control unit. 
In the electronic control unit integrated with a hydraulic unit in an 
anti-lock brake system of the present invention, a connecting portion of 
the connector on the electronic control unit side to which an external 
connector for supplying electrical power is connected is arranged being 
extended into a clearance formed between an upper face of the case of the 
electronic control unit and the motor. 
In the electronic control unit integrated with a hydraulic unit in an 
anti-lock brake system of the present invention, a connecting portion of 
the connector on the electronic control unit side to which an external 
connector is connected is arranged being extended into a clearance formed 
between an upper face of the case of the electronic control unit and the 
motor. Accordingly, a dead space formed between the upper face of the case 
of the electronic control unit and the motor can be effectively utilized 
and the overall electronic control unit integrated with the hydraulic unit 
can be made compact. 
The electronic control unit integrated with a hydraulic unit in an 
anti-lock brake system of the present invention comprises a solenoid 
female connector composed of a U-shaped female--female relay terminal and 
a resin housing. In this case, the U-shaped female--female relay terminal 
has female connecting portions at both ends with which male terminals on 
the solenoid coil side and male terminals connected with the printed 
mounting board on the electronic control unit side are connected. 
Therefore, the hydraulic unit and the electronic control unit are 
mechanically connected with each other via the solenoid female connector, 
and at the same time the male terminals on the solenoid coil side and the 
electronic control unit are electrically connected. 
In the electronic control unit integrated with a hydraulic unit in an 
anti-lock brake system of the present invention, the solenoid female 
connector includes a U-shaped female--female relay terminal having female 
connecting portions at both ends, and male terminals protruding from the 
hydraulic housing are connected with one of the female connecting portions 
of the female--female relay terminal, and male terminals on the electronic 
control unit side are connected with the other female connecting portion 
of the female--female relay terminal. When quality control and 
transportation of the hydraulic unit is conducted under the condition that 
the male terminals on the solenoid coil side protruding from a lower face 
of the hydraulic housing of the hydraulic unit are connected with one of 
the female connecting portions of the female--female relay terminal of the 
solenoid female connector, male terminals do not protrude outside 
directly, but they can be protected by the resin housing. Accordingly, it 
is possible to prevent the male terminals from contacting or colliding 
with other parts, so that the male terminals can be prevented from being 
damaged. As a result, quality control can be easily carried out. 
When the U-shaped female--female relay terminals are used, in the 
connection of the male terminals on the solenoid coil side in the 
hydraulic housing with the male terminals on the electronic control unit 
side, it is possible to absorb a positional error which is in a range of 
allowance. Accordingly, the degree of freedom can be enhanced in the 
process of positioning the electronic control unit and the hydraulic unit. 
Since the female--female relay terminal is bent into a U-shape, it is 
possible to reduce the height of the connecting structure, so that the 
overall structure can be made compact. 
In the electronic control unit integrated with a hydraulic unit in an 
anti-lock brake system of the present invention, in the case, there is 
provided a connector portion for supplying electrical power to the motor, 
and also there is provided a motor relay for controlling to feed 
electrical power from the connector portion to the motor when the contact 
point is turned on and off in accordance with a control-signal sent from 
the electronic control section. Also, in the case, there are provided a 
motor power source supply terminal of the connector portion and a motor 
relay terminal for electrically connecting with the contact point of the 
motor relay. The motor power feeding terminal penetrates the case and 
extends into the case. When the above terminals are electrically connected 
with each other by a bus bar in the case, an electrical power feeding path 
for feeding electrical power to the motor is formed. 
In the electronic control unit integrated with a hydraulic unit in an 
anti-lock brake system of the present invention, the motor power source 
supply terminal, the motor relay terminal and the motor power feeding 
terminal are electrically connected with each other by the bus bar. 
Therefore, a power feeding path to feed power to the motor is composed of 
the bus bar, the electrical current capacity of which is large, in the 
electronic control unit. Accordingly, it is possible to form a motor power 
feeding circuit of large capacity. 
In the electronic control unit integrated with a hydraulic unit in an 
anti-lock brake system of the present invention, the connector terminal 
unit accommodated in the connector housing of the case of the electronic 
control unit has a main body provided with a plurality of connector 
terminals. An engaging protrusion is formed on one side of the outer 
circumferential side face of the main body, and a fixing portion is formed 
on the other side face. On the inner circumferential face side of the 
connector housing, there is provided an engaging step portion capable of 
engaging with the engaging protrusion in the direction of insertion of the 
external connector. Also, there is provided an attaching portion to which 
the fixing portion is fixed. When the fixing portion is put on and fixed 
to the attaching portion under the condition that the engaging protrusion 
of the main body is engaged with the engaging step portion, the connector 
terminal unit is accommodated in the connector housing. 
According to the electronic control unit integrated with a hydraulic unit 
in an anti-lock brake system arranged as described above, the connector 
terminal unit is accommodated in the connector housing when the engaging 
protrusion on one face of the outer circumferential side face of the main 
body is engaged with the engaging step portion on the connector housing 
side in the direction of insertion of the external connector, and the 
fixing portion on the other side is put on and fixed to the attaching 
portion on the connector housing side. Accordingly, only when the other 
side of the main body is fixed, the connector terminal unit can be fixed. 
In this connection, when the external connector is connected with the 
connector terminal unit, the mechanical strength can be maintained 
sufficiently high to resist a pushing force applied to the connector 
because the engaging protrusion is engaged with the engaging step portion 
on the connector housing side. 
According to the electronic control unit integrated with a hydraulic unit 
in an anti-lock brake system of the present invention, the electronic 
control section includes a printed mounting board. The case of the 
electronic control unit is composed of an upper case made of aluminum by 
means of die casting and a plate-shaped lower case which closes an opening 
portion on the lower side of the upper case. In the upper case, there is 
provided a connector connecting portion with which the external connector 
for supplying electrical power is connected. The external connector is 
electrically connected with the connector connecting portion of the upper 
case, and the connector terminal unit is fixed by screws, and the printed 
mounting board is fixed to the upper case by screws. Further, an 
electrical connection box is fixed to the upper case by screws, wherein 
the electrical connection box composes a motor drive circuit when the 
connecting terminals on the connector terminal unit side, the motor relay 
side on the printed mounting board and the motor side are connected with 
each other. In the solenoid connector connecting portion provided with the 
connecting terminal on the electronic unit side with which the connecting 
terminal on the solenoid valve side is connected, there is provided an 
engaging portion engaged with and held by the upper case. 
According to the present invention, the connector terminal unit 
accommodated in the case of the electronic control unit, the printed 
mounting board, the electrical connection box and the solenoid connector 
connecting portion are directly fixed to the upper case made of aluminum 
by means of die casting. Due to the above assembling system, it is 
sufficient to give consideration to the manufacturing error caused between 
each member and the upper case. Accordingly, as compared with an 
assembling system in which the members are fixed to the upper case under 
the condition that they have already been assembled, the manufacturing 
errors of the members are not accumulated, and the assembly allowance can 
be reduced. Therefore, the assembling accuracy of the electronic control 
unit can be enhanced.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT 
Referring to the accompanying drawings, descriptions will be given to an 
electronic control unit integrated with a hydraulic unit in an anti-lock 
brake system of an automobile to which the connecting structure for 
connecting a connector terminal unit with a wiring board of an embodiment 
of the present invention is applied. In FIGS. 5 to 9, reference numeral 1 
is an electronic control unit, the upper portion of which is integrally 
connected with a hydraulic unit 2. The electronic control unit 1 and the 
hydraulic unit 2 compose an electronic control unit integrated with a 
hydraulic unit in an anti-lock brake system. 
First, an electrical structure of this anti-lock brake system will be 
explained as follows. As shown in FIG. 10, the rotation of each wheel (not 
shown) of an automobile is respectively detected by a rotation detecting 
device 100a to 100d. This detection signal is sent to an electronic 
control section 6 provided in the electronic control unit 1. In accordance 
with the detection signal sent from each rotation detecting device 100a to 
100d, the electronic control section 6 discriminates whether each wheel 
tends to lock or not when the brake is applied. According to the result of 
the discrimination, a solenoid valve 4a to 4d and the motor relay 17, 
which will be described later, are controlled to be opened and closed. 
There is provided a motor 7 on the hydraulic unit 2 side. Electrical power 
is supplied to the motor 7 from a battery 108 via a contact of a motor 
relay 17 provided in the electronic control unit 1. When the contact of 
the motor relay 17 is turned on and off in accordance with a control 
signal sent from the electronic control section 6, the motor 7 is 
controlled. 
In the electronic control unit 1, there is provided a fail-safe relay 18 
for stopping the supply of electrical power to the solenoid valves 4a to 
4d when a problem has occurred in the anti-lock brake system. 
As shown in the drawings, there are provided a battery 108 installed in the 
automobile, an ignition switch 109, a stop lamp switch 110 disposed close 
to the brake pedal, a stop lamp 111 composing a portion of the rear lamp, 
a warning lamp 112 telling the occurrence of an abnormality of the 
anti-lock brake system, an earth terminal 120, and rotation detecting 
devices 100a to 100d. Respective circuits from the above parts to the 
electronic control unit 1 are composed of one piece of wire harness. At an 
end of the wire harness, there is provided an external connector 14 (shown 
in FIG. 5). This external connector 14 is connected with a connector 
terminal unit 19 provided on the electronic control unit 1 side. 
Next, the structure of the electronic control unit integrated with a 
hydraulic unit in an anti-lock brake system will be explained as follows. 
As shown in FIGS. 5 to 9, the hydraulic unit 2 controls the pressure of 
brake fluid of the wheel cylinder of each wheel when four solenoid valves 
4a to 4d attached to a rectangular parallelepiped hydraulic housing 3 are 
opened and closed. Control of opening and closing each solenoid valve 4a 
to 4d is conducted in accordance with a control signal sent from the 
electronic control section 6 provided in a case 5 of the electronic 
control unit 1. In this hydraulic unit 2, on a side of the hydraulic 
housing 3, there is provided a motor 7, the outer configuration of which 
is columnar, for driving a plunger pump (not shown) so that the brake 
fluid can be returned to a master cylinder. 
In the hydraulic housing 3, there are provided a plunger pump described 
before, a flow control valve not shown operated in accordance with the 
opening and closing of each solenoid valve 4a to 4d, and a brake fluid 
path. Further, in the hydraulic housing 3, on the upper face, there are 
provided piping ports 8 for supplying the brake fluid to the wheel 
cylinders. Furthermore, on the upper face, there are provided piping ports 
9 for supplying the brake fluid to the master cylinder. 
The case 5 of the electronic control unit 1 is formed flat, and the size of 
the case 5 is approximately the same as that of the hydraulic unit 2 on a 
plan view. The case 5 is composed of an upper case 11 made of aluminum by 
means of die casting and a plate-shaped lower case 12 made of a metallic 
sheet by means of sheet metal forming. 
There is provided a connector housing 11b formed integrally with the 
aforementioned upper case 11 in such a manner that the connector housing 
11b extends upwards, and this connector housing 11b is arranged on both 
edge portions on the upper face of the upper case 11 and connected with a 
relay accommodating portion 11a and an external connector 14 for supplying 
electrical power. This connector housing 11b is further extended to the 
side. That is, the connector housing 11b is arranged being extended in a 
clearance formed between the upper face of the upper case 11 and the motor 
7. In this connection, there is provided a protrusion 11d which is formed 
integrally with the connector housing 11b, and this protrusion 11d 
conducts a cam action together with an auxiliary engaging device 14a of 
the external connector 14 when it is connected with the external connector 
14. 
In the case 5, there are provided a printed wiring board 16 provided with 
an appropriate circuit composing the electronic control section 6, a motor 
relay 17, and a fail-safe relay 18. As shown in FIG. 5, relays 17, 18 are 
arranged at positions in the relay accommodating portion 11a on the upper 
case 11. A connector terminal unit 19 connected with the external 
connector 14 is arranged at a position of the connector housing 11b. 
As shown in FIGS. 9, 11, 12, 13 and 14, the connector terminal unit 19 is 
composed as follows. In the main body 19a of the connector terminal unit 
19, there are provided three rows of connector terminals 75 to be 
connected with the external connector 14, wherein the connector terminals 
75 penetrate from the front side to the reverse side of the main body 19a. 
On the side of the connector terminals 75, there are provided terminals 79 
for supplying electrical power to the electronic control section 6, and 
male terminals 80 for supplying electrical power to the motor 7. The 
electrical power supply terminal 79 is connected with a lead wire 79a 
(shown in FIG. 5) on the reverse side of the main body 19a. The other end 
of this lead wire 79a is electrically connected with the printed wiring 
board 16. A front end of the male terminal 80 for supplying electrical 
power to the motor protrudes from the front face of the main body 19a, and 
a rear end of the male terminal 80 extends downward on the reverse side of 
the main body 19a and is connected with a connecting portion 43a (shown in 
FIG. 5) of an electrical connection box 42 described later. 
The terminals 75, 79, 80 on the front face of the main body 19a are 
electrically connected with the respective terminals (not shown in the 
drawing) in the external connector 14. In this connection, reference 
numeral 78 is a rib, which is provided for preventing the terminals 75, 
79, 80 from being deformed when the external connector 14 is engaged. 
At the front end on the upper face side of the main body 19a, there is 
provided an engaging protrusion 77 which protrudes upward. This engaging 
protrusion 77 is capable of engaging with an engaging step portion 76 
provided on an upper inner circumferential face of the connector housing 
11b. On a lower face of the main body 19a, there is integrally provided a 
box-shaped fixing portion, which is open to the front side, and this a 
box-shaped fixing portion is composed of a pair of side walls 81a, a rear 
wall 81b and a bottom plate 19b. At the front end of the bottom plate 19b, 
there are provided two screw insertion holes 83, and at the front end on 
the upper face of the bottom plate 19b, there are provided two positioning 
protrusions 84 in such a manner that the positioning protrusions 84 and 
the screw insertion holes 83 can not overlap each other. 
On both sides of the reverse side of the connector terminal unit 19, there 
are integrally provided a pair of elastic hooks 90 for holding an 
auxiliary wiring board 86 described later. Hook portions 90a protrude at 
ends of both elastic hooks 90 in such a manner that the hook portions 90a 
are opposed to each other. By the action of the pair of elastic hooks 90, 
the auxiliary wiring board 86 is pressed against the connector terminal 
unit 19 from the reverse side so that the auxiliary wiring board 86 can be 
locked. 
On the other hand, as shown in FIGS. 8, 9 and 19, in the connector housing 
11b, there are provided a pair of attaching pieces 82 having screw holes 
which protrude backward from the rear end of the lower face on the inner 
circumferential face, and these attaching pieces 82 are provided at 
positions corresponding to the pair of screw holes 83 described before. 
Further, a pair of attaching pieces 85 having positioning holes are 
provided at positions corresponding to the pair of positioning protrusions 
84. 
The connector terminal unit 19 composed as described above is attached to 
the connector housing 11b in the following manner. The connector terminal 
unit 19 is engaged with the connector housing 11b from the lower inside 
portion. Under the condition that the engaging protrusion 77 of the 
connector terminal unit 19 is engaged with the engaging step portion 76 on 
the connector housing 11b side in the inserting direction of the external 
connector 14, while the bottom plate 19b is put on the lower side of the 
attaching pieces 82, 85, the positioning protrusion 84 is inserted into 
the positioning hole of the attaching piece 85, and at the same time the 
screw 82a is inserted into the screw insertion hole 83 and screwed to the 
screw hole of the attaching piece 82. When the screw is fastened as 
described above, the main body 19a is pressed against the upper face on 
the inner circumference of the connector housing 11b, so that a contact 
area of the engaging protrusion 77 with the engaging step portion 76 is 
increased. Accordingly, the engaging protrusion 77 and the step portion 76 
are engaged with each other more positively. 
As shown in FIG. 9, the connector terminal 75 of the connector terminal 
unit 19 is connected with the printed wiring board 16 in the electronic 
control unit 1 via the auxiliary wiring board 86 and a flat cable such as 
FPC (flexible printed circuit board) 88. 
That is, on the reverse side of the connector terminal unit 19, each 
connector terminal 75 is arranged extending backward, so that the terminal 
portion 75a can be formed. This terminal portion 75a is electrically 
connected with the auxiliary wiring board 86 (shown by dot lines in FIGS. 
12, 13 and 14) provided on the reverse side of the connector terminal unit 
19 by means of soldering. 
As shown in FIG. 15a, on this auxiliary wiring board 86, there are provided 
through-holes 92, into which the terminal portion 75a is inserted, and a 
wiring pattern (not shown). This auxiliary wiring board 86 is integrated 
with the printed wiring board 16. On the boundary between the printed 
wiring board 16 and the auxiliary wiring board 86, there is formed a 
separation groove 87. As shown in FIGS. 16a-c, one end of FPC 88 is made 
to penetrate the through-hole 16b on the printed wiring board 16 and 
soldered to the land 16a (shown in FIG. 15a), so that FPC 88 can be 
electrically connected with the printed wiring board 16. The other end of 
FPC 88 is soldered to the land 86a (shown in FIG. 15a) on the auxiliary 
wiring board 86, so that FPC 88 can be electrically connected with the 
auxiliary wiring board 86. After that, both boards 16, 86 are separated 
from each other through the separation groove 87. After the separation, 
while the terminal portion 75a of the connector terminal unit 19 is being 
inserted into the through-holes 92 on the auxiliary wiring board 86, the 
auxiliary wiring board 86 is pressed against a contact face (a hatched 
portion in FIG. 13) on the reverse side of the main body 19a of the 
connector terminal unit 19, and both ends of the auxiliary wiring board 86 
are held by a pair of elastic hooks 90 protruding onto the reverse side of 
the connector terminal unit 19. Under the above condition, the terminal 
portion 75a is soldered onto the auxiliary wiring board 86. 
As described above, after the connector terminal unit 19 and the printed 
wiring board 16 have been electrically connected with the auxiliary wiring 
board 86 and FPC 88, the connector terminal unit 19 is attached to the 
connector housing 11b, and the printed wiring board 16 is assembled into 
the case 5. 
On the wall 11c of the connector housing 11b arranged in the upward and 
downward direction, which is a case wall face opposed to the hydraulic 
housing 3, as shown in FIGS. 5, 9 and 17, there is provided a small 
ventilation hole portion 21. This ventilation hole portion 21 includes: a 
hole portion 22 formed on the wall portion 11c; and a film body 23 having 
air-permeability attached inside the hole portion 22 so that the hole 
portion 22 can be closed by the film body 23. The film body 23 having 
air-permeability is mainly composed of a thin film 23a made of Teflon 
having a large number of minute holes, the diameter of which is 4.mu. to 
10.mu., so that water can not permeate through the film body 23. Around 
the outer circumference of the ventilation film body 23, there is provided 
a holding frame 23b made of polypropylene or polyester, wherein the 
holding frame 23b is attached to the ventilation film body 23 by the 
application of heat and force. 
This ventilation film body 23 is attached to the inside of the hole portion 
22 with an adhesive double coated tape 24. Therefore, the ventilation hole 
portion 21 has air-permeability, however, no water permeates through the 
ventilation hole portion 21. 
As shown in FIGS. 9, 18 and 19, on the lower face at the center of the 
upper case 11, there is provided a bolt insertion cylindrical portion 26 
which extends to the lower case 12. Along the inner circumferential edge 
of the lower end of the bolt insertion cylindrical portion 26, there is 
provided a seal step portion 26a. 
An O-ring 27 is attached to the seal step portion 26a, and the lower case 
12 is attached to the upper case 11 in such a manner that the lower 
opening 28 of the upper case 11 is closed by the lower case 12. A bolt 31 
having a flange is inserted into a bolt insertion hole 29 on the lower 
case 12 side and a bolt insertion hole 30 on the upper case 11 side. When 
the bolt 31 having a flange is screwed to the hydraulic housing 3 in this 
way, the electronic control unit 1 and the hydraulic unit 2 are integrated 
with each other. 
In this case, the bolt insertion cylindrical portion 26 is sealed from the 
lower case 12 by the O-ring 27. 
As shown in FIGS. 9 and 20 to 22, along the inner circumferential edge of 
the lower opening 28 of the upper case 11, there is provided a seal step 
portion 32 with which the lower case 12 is engaged. In the seal step 
portion 32, there is formed a seal groove 32a in the circumferential 
direction. 
As shown in FIG. 20, under the condition that the seal groove 32a is filled 
with an adhesive sealing agent 33, the lower case 12 is engaged with the 
seal step portion 32 as shown in FIG. 21, and the lower edge portion of 
the lower opening 28 of the upper case 11 is caulked at regular intervals 
at a plurality of positions. In this way, the lower case 12 is caulked to 
the upper case 11 by means of caulking as shown in FIG. 22. Due to this 
caulking connection, the sealing agent 33 adheres onto both the upper 11 
and the lower case 12, so that both cases can be closely connected with 
each other and sealed. 
As shown in FIGS. 19 and 23, in the hydraulic housing 3, there are provided 
a pair of buffer chambers 35 in which brake fluid is temporarily stored in 
the anti-lock brake operation. The buffer chamber 35 includes: a brake 
fluid storing chamber 35a into which brake fluid flows; and a chamber 35b 
in which no brake fluid is stored which is located on the opposite side of 
the brake fluid storing chamber 35a being partitioned by a piston 36. The 
chamber 35b in which no brake fluid is stored faces the lower face of the 
hydraulic housing 3. In the lower portion of the chamber 35b in which no 
brake fluid is stored, there is provided a cover 37 having a ventilation 
hole 37a. Also, there is provided a return spring 38 between the piston 36 
and the cover 37. 
In order to communicate the chamber 35b in which no brake fluid is stored, 
with the outside air when the electronic control unit 1 is connected with 
the hydraulic unit 2, on the upper face of the upper case 11, there is 
formed a communication groove 40 which communicates the buffer chamber 35 
with the outside of the hydraulic housing 3. 
In FIGS. 5, 24a, 24B and 25, reference numeral 42 is an electrical 
connection box composing an electrical power circuit for supplying 
electrical power to the motor 7, and a high intensity of electrical 
current flows in the electrical connection box. The electrical connection 
box 42 includes a bus bar holding case 43 made of resin. On one side of 
the bus bar holding case 43, there is provided a connector side connecting 
portion 43a with which a male terminal 80 (shown in FIG. 33) of the 
connector terminal unit 19 for supplying electrical power to the motor, is 
connected. On the other side of the bus bar holding case 43, there is 
provided a relay side connecting portion 43b with which male terminals 
130a, 130b (shown in FIG. 33) for the motor relay on the motor relay 17 
side are connected. At the center, there is provided a motor side 
connecting portion 43c with which a male terminal 45 (shown in FIG. 33) 
for supplying electrical power to the motor 7 is connected. 
In the bus bar holding case 43, there are provided connecting portions 43a, 
43b, 43c which are aligned on the same straight line. In each connecting 
portion, there is provided a relay terminal 46, in the upper and lower 
portions of which female connecting portions 46a are attached. In the 
direction in which the relay terminals 46 are arranged, long-plate-shaped 
bus bars 47, 48, 49 are disposed. At both end portions of the bus bars, 
there are provided male terminals 47a, 48a, 49a which protrude upward. 
These male terminals 47a, 48a, 49a are inserted into and connected with 
the lower side of the corresponding lower side female connecting portions 
46a of the relay terminals 46. 
As shown in FIGS. 25 and 26, these bus bars 47, 48, 49 are respectively 
fixed to bus bar holding portions 138 provided on the lower side of the 
bus bar holding case 43. That is, at the ends of a pair of bus bar holding 
portions 138, there are provided a pair of engaging protrusions 138a 
having a pair of guide faces 138b, the interval of which is gradually 
reduced in the inward direction. Both sides on the upper faces of the bus 
bars 47, 48, 49 are chamfered. When the bus bars 47, 48, 49 are inserted 
while they are being pressed against the guide faces 138b of the bus bar 
holding portion 138, the bus bar holding portion 138 is uniformly extended 
outside and returned elastically, and then the bus bars 47, 48, 49 are 
accommodated inside the bus bar holding portion 138. 
As shown in FIGS. 27 and 28, concerning the motor relay 17 mounted on the 
front face side of the printed wiring board 16 in the electronic control 
unit 1, a coil side terminal (not shown) of the motor relay 17 is 
connected with the wiring pattern on the printed wiring board 16, and a 
contact side terminal (not shown) of the motor relay 17 is connected with 
the male terminals 130a, 130b for the motor relay in the following manner. 
The male terminal 130a for the motor relay is made of a thin metallic 
sheet by means of punching and bending, and a relay terminal insertion 
hole 131a into which the contact side terminal of the motor relay 17 is 
inserted is provided at the base end of the male terminal 130a for the 
motor relay, and the fore end of the male terminal 130a for the motor 
relay is formed into a C-shape. As shown in FIG. 28, the fore end 131b is 
extended downward and connected with the electrical connection box 42. 
Further, there are provided a pair of holding pieces 132 in the 
intermediate portion between the base end portion and the fore end 
portion. 
Under the condition that the base end of the male terminal 130a of the 
motor relay described above is arranged on the lower face of the printed 
wiring board 16, the contact side terminals of the motor relay 17 are 
inserted into the terminal insertion hole (not shown) on the printed 
wiring board 16 and the relay terminal insertion hole 131a, and the 
contact side terminals of the motor relay 17 are soldered to the male 
terminals 130a for the motor relay on the lower face of the printed wiring 
board 16. At this time, the holding pieces 132 of the male terminal 130a 
for the motor relay penetrate a pair of holding holes 133 provided on the 
printed wiring board 16, and upper ends of the holding pieces 132 are bent 
onto the upper face of the printed wiring board 16. Due to the foregoing, 
the male terminal 130a for the motor relay can be fixed onto the printed 
wiring board 16. In this connection, the male terminal 130b is arranged 
substantially in the same manner and electrically connected with the other 
contact side terminal of the motor relay 17. 
An insulating spacer 135 shown in FIG. 29 is interposed between the male 
terminals 130a, 130b for the motor relay and the case 5 so that the 
electrical circuit of the anti-lock brake system can not be 
short-circuited when the C-shaped portions of the male terminals 130a, 
130b for the motor relay come into contact with the case 5 of the 
electronic control unit 1 made of aluminum. This insulating spacer 135 is 
formed into a trapezoidal block shape having a tapered face which is 
formed in accordance with an inner face of the relay accommodating portion 
11a (shown in FIG. 9) of the case 5. A hole 137a formed on the upper face 
of the insulating spacer 135 is engaged with a protrusion 136 (shown in 
FIG. 33) formed on the inner circumferential face of the relay 
accommodating portion 11a. Further, a pair of relay terminal engaging 
recesses 137b formed on the lower face of the insulating spacer 135 are 
engaged with the C-shaped portions of the male terminals 130a, 130b for 
the motor relay. 
As shown in FIG. 30, in the lower portion of the motor 7, there are 
provided male terminals 45 for feeding electrical power to the motor in 
such a manner that the male terminals 45 protrude downward. There is 
protruded an annular wall 51 which surrounds the outer circumference of 
the male terminals 45 for feeding electrical power to the motor. Under the 
condition that an O-ring 52 is attached along the annular wall 51, a motor 
side connecting portion 43c of the electrical connection box 42 is 
inserted into the annular wall 51 via an insertion hole 53 on the printed 
wiring board 16 and an insertion hole 54 of the upper case 11. Therefore, 
when the electronic control unit 1 is integrated with the hydraulic unit 
2, the male terminals 45 for feeding electrical power to the motor can be 
connected with the female connecting portions 46a on the upper side of the 
relay terminal 46. In this connecting condition, the O-ring 52 is attached 
with pressure onto the upper face of the upper case 11, so that the 
annular wall 51 and the upper case 11 are sealed from each other. 
As shown in FIG. 33, the male terminal 45 for feeding electrical power to 
the motor 7, the male terminal 80 for supplying electrical power source to 
the motor of the connector terminal unit 19 and the male terminal 130 for 
the motor relay are aligned on the same straight line, so that they are 
electrically connected with each other through the relay terminal 46 and 
the bus bars 47, 48, 49. In this way, there is formed an electrical 
circuit for supplying electrical power source to the motor which is 
composed of a male terminal 80 for supplying electrical power source to 
the motor, bus bar 49, male terminal 130b for the motor relay, motor relay 
17, male terminal 130a for the motor relay, bus bar 48, male terminal 45 
for feeding electrical power to the motor, motor 7, male terminal 45 for 
feeding electrical power to the motor, bus bar 47, and male terminal 80 
for supplying electrical power source to the motor. 
In this case, as shown in FIG. 32, the width direction on the fore end side 
of each male terminal 45, 80, 130a, 130b is aligned with the arrangement 
direction of each male terminal 45, 80, and each male terminal is pressed 
against and held by the relay terminal 46 so that it can freely slide in 
the width direction. 
FIG. 34 is a view showing the attaching structure of a heat generating 
member 55 such as a regulator and a converter mounted on the printed 
wiring board 16. On the printed wiring board 16, there is provided a 
conductive portion 56, and the heat generating member 55 is mounted, 
coming into contact with the conductive portion 56. The printed wiring 
board 16 is fixed to the upper case 11 by screws 57 while the conductive 
portion 56 comes into contact with the upper case 11. 
Each solenoid valve 4a to 4d provided in the hydraulic housing 3 has a pair 
of male connecting terminals 58 protruding downward from the lower face of 
the hydraulic housing 3 (shown in FIG. 37). The solenoid valves 4a to 4d 
are respectively connected with the solenoid connectors 59 shown in FIGS. 
5 and 35 to 37. The solenoid connectors 59 are connected with the solenoid 
connector connecting portion 60 arranged at one end of the printed wiring 
board 16 (shown in FIGS. 5 and 37). 
The solenoid connector 59 includes: a flat flange base portion 59a made of 
synthetic resin; and four solenoid connecting portions 59b protruding 
downward corresponding to the solenoid valves 4. In each solenoid 
connecting portion 59b, there are provided a pair of relay terminals 61 
being locked. 
As shown in FIGS. 36 and 37, each female--female relay terminal 61 
includes: female connecting portions 61a arranged on both end portions; 
and an intermediate linking portion 61b for linking both female connecting 
portions 61a, wherein the intermediate portion is bent so that the 
female--female relay terminal 61 is formed into a substantial U-shape. The 
female connecting portions 61a on both sides are accommodated in the 
respective terminal accommodating recesses 59c of the solenoid connecting 
portion 59b from the upper side, and under the condition that a small 
clearance is formed between the linking portion 61b and the female 
solenoid connector 59 in the upward and downward direction, one of the 
female connecting portions 61a is engaged with the engaging portion 59a 
being locked. In this case, the female--female relay terminal 61 is 
accommodated in and held by the female solenoid connector 59 being locked 
under the condition that the female connecting portion 61a is allowed to 
slightly move in the upper and lower direction. 
One of the female connecting portions 61a is capable of being connected 
with the male terminal 58 of the solenoid coil of the solenoid valve 4 in 
such a manner that the male terminal 58 is inserted into one of the female 
connecting portions 61a from the upper position. The other female 
connecting portion 61a is capable of being connected with the male 
terminal 66 (shown in FIG. 37) described later in such a manner that male 
terminal 66 is inserted into the female connecting portion 61a from the 
lower position via the terminal insertion hole 59d formed on the lower 
face of the solenoid connecting portion 59b. 
In this case, the female connecting portion 61a with which the male 
terminal 58 on the solenoid coil side is connected is formed into a 
faston-shape, the contact pressure of which is high, and the female 
connecting portion 61a with which the male terminal 66 on the electronic 
control unit 1 side is connected is formed into a tongue-shape. The female 
connecting portion 61a on the male terminal 66 connection side is engaged 
with and fixed to the male terminal. The female connecting portion 61a on 
the other male terminal 58 connection side is not fixed but put in a 
condition in which the female connecting portion 61a can be moved in the 
upward and downward direction. Length S (shown in FIG. 36) of the linking 
portion 61b to link both the female connecting portions 61a is determined 
to be an appropriate value so that the female connecting portion 61a with 
which the other male terminal 66 is connected can not be moved even when 
the male terminal 58 on the solenoid coil side connected with the female 
connecting portion 61a is moved in the upward and downward direction. 
On the upper face of the flange base portion 59a, there are provided a pair 
of positioning pins 63 which protrude upward. As shown in FIG. 37, when 
each positioning pin 63 is engaged with the corresponding positioning 
hole. 64 formed on the lower face of the hydraulic housing 3, the solenoid 
connector 59 can be positioned with respect to the hydraulic housing 3, 
and at the same time, each male terminal 58 of each solenoid valve 4 can 
be connected with the female connecting portion 61a of the relay terminal 
61 accommodated in each solenoid connecting portion 59b. 
In the outer circumferential edge portion of the flange base portion 59a, 
there is provided a guide composed of a rubber ring 65. As shown in FIG. 
37, when the rubber ring 65 is attached to the outer circumferential edge 
portion of the flange base portion 59a, the rubber ring 65 can be arranged 
at a predetermined position on the lower face of the hydraulic housing 3. 
As shown in FIGS. 37 to 39, the male solenoid connector 60 is composed of a 
resin housing made of synthetic resin having flexibility. The male 
solenoid connector 60 is provided with an engaging recess 60a to be 
engaged with the solenoid connecting portion 59b of the female solenoid 
connector 59. Corresponding to each terminal insertion hole 59d of each 
solenoid connecting portion 59b, there is provided a male terminal 66 in 
the engaging recess 60a in such a manner that the male terminal 66 
protrudes upward. The male terminal 66 is bent into a U-shape, and the 
other end portion of the male terminal 66 is connected to the circuit side 
of the printed mounting board 16 by means of soldering 66a. 
As shown in FIGS. 37 and 38, when the solenoid connector 60 is engaged with 
the attaching hole 67 formed on the upper case 11, the engaging piece 60b 
is engaged in the attaching hole 67 in such a manner that the engaging 
piece 60b is locked by the action of elastic deformation of the solenoid 
connector 60. There are provided an appropriate number of engaging pieces 
60b, the detail of which is described above, on one side of the male 
solenoid connector 60, that is, there is formed a lock mechanism for 
preventing the male solenoid connector 60 from being disconnected 
downward. In this case, as shown in FIG. 37, an extending piece portion 
60c of the male solenoid connector 60 comes into contact with the upper 
case 11, 50 that the male solenoid connector 60 can be prevented from 
being disconnected upward when the female solenoid connector 59 is 
disconnected. 
As shown in FIG. 37, there is provided a seal step portion 68 in the 
circumferential edge portion of the attaching hole 67 on the upper side of 
the upper case 11. Each male terminal 58 of the solenoid valve 4 is 
connected with each female connecting portion 61a of the female solenoid 
connector 59. Under the condition that the rubber ring 65 is attached to 
the outer circumferential edge of the flange base portion 59a, each 
solenoid connecting portion 59b is engaged with each engaging recess 60a 
of the male solenoid connector 60. Then each male terminal 66 is connected 
with each female connecting portion 61a on the other side via each 
terminal insertion hole 59d, and at the same time the flange base portion 
59a and the rubber ring 65 are engaged with the seal step portion 68. Due 
to the integral connection of the electronic control unit 1 with the 
hydraulic unit 2, the rubber ring 65 is compressed between the hydraulic 
housing 3 and the seal step portion 68, so that the upper case 11 and the 
hydraulic housing 3 are sealed from each other. 
In this embodiment, the electronic control unit 1 and the hydraulic unit 2 
are integrally connected with each other by the aforementioned bolt 31 
having a flange and a pair of bolts 70 screwed to the hydraulic housing 3 
penetrating the upper case 11 as shown in FIG. 1. 
As shown in FIG. 40, there is provided a positioning protrusion 60d which 
is attached to the extending piece 60c of the male solenoid connector 60. 
There are formed positioning holes 71, 72 on the printed mounting board 16 
and the upper case 11 at positions corresponding to the positioning 
protrusion 60d. When the positioning protrusion 60d is inserted into the 
positioning holes 71, 72 in the process of assembling, each member can be 
positioned. 
According to the connecting structure of the connector terminal unit with 
the printed mounting board which is applied to the electronic control unit 
integrated with a hydraulic unit in an anti-lock brake system of the 
present embodiment, since the connector terminal unit 19 is electrically 
connected with the printed mounting board 16 by FPC 88 having flexibility, 
it is possible for the connector terminal unit 19 to move in a range 
determined by the length of FPC 88 and further the posture of the 
connector terminal unit 19 can be freely changed. Accordingly, even when 
the position and posture of the connector housing 11b are changed, the 
connector terminal unit 19 can move in a wide range. For example, even 
when the design is changed in such a manner that the connector housing 11b 
is directed obliquely upward as shown by a two-dotted broken line in FIG. 
7, it is not necessary to change the design of the connector terminal unit 
19 and the printed mounting board 16. Even when there are provided a large 
number of connector terminals 75, they may be electrically connected with 
the auxiliary wiring board 86 at the same time, and the auxiliary wiring 
board 86 and the printed mounting board 16 may be electrically connected 
with each other by the FPC 88. In this way, the connector terminal unit 19 
can be easily connected with the printed mounting board 16. 
Since the connector terminal unit 19 is electrically connected with the 
printed mounting board 16 via FPC 88, they can be electrically connected 
with each other irrespective of errors caused in the process of 
manufacturing the printed mounting board 16 and errors caused in the 
process of assembling the printed mounting board 16 to the case 5. 
When the auxiliary wiring board 86 is formed, it is formed integrally with 
the printed mounting board 16, and the auxiliary wiring board 86 and the 
printed mounting board 16 are electrically connected with each other by 
FPC 88 before the separation of them. Accordingly, the auxiliary wiring 
board 86 can be easily formed, and FPC 88 can be easily connected with the 
printed mounting boards 16, 86. 
In this embodiment, the connecting structure for connecting a connector 
terminal unit with a printed mounting board of the present invention is 
explained with respect to a case of the electronic control unit integrated 
with a hydraulic unit in an anti-lock brake system. Of course, the present 
invention can be applied to other electronic units such as household 
electric appliances and office automation equipment. 
Since there are provided a large number of connector terminals 75, the 
connector terminal unit 19 is connected with the auxiliary wiring board 86 
via FPC 88 in this embodiment. However, as long as the electrical wires 
are flexible, other flat electrical wires or normal circular electrical 
wires may be used. 
In this embodiment, the connector terminal 75 is connected with the 
auxiliary wiring board 86 in such a manner that the connector terminals 75 
are inserted into and soldered to the through-holes 92 on the auxiliary 
wiring board 86. However, the connector terminals 75 may be directly 
soldered to the wiring pattern on the auxiliary wiring board 86, or 
alternatively terminals to be connected with may be provided on the 
auxiliary wiring board 86, and the terminal portion 75a of the connector 
terminal 75 may be inserted into these terminals to be connected with so 
that they can be electrically connected with each other. 
Instead of using the straight connector terminals 75, approximately 
L-shaped connector terminals may be used in such manner that the terminals 
75a of the approximately L-shaped connector terminals are protruded to the 
lower portion of the connector terminal unit 19 and connected with the 
auxiliary wiring board 86. 
The connector terminal unit 19 is fixed to the connector connecting portion 
11b of the upper case 11 by screws, and the male solenoid connector 60 is 
engaged with the attaching hole 67 of the upper case 11, so that the 
engaging piece 60b is engaged being locked. Under the above condition, the 
printed mounting board 16, on which the motor relay 17 and the fail-safe 
relay 18 are provided, is fixed to the upper case 11 by screws. Further, 
as shown in FIG. 37, the extending portion 60c of the male solenoid 
connector 60 is fixed to the printed mounting board 16 by the screw 75. 
Then the electrical connection box 42 is attached to the upper case 11 
while the connector side connecting portion 43a and the relay side 
connecting portion 43b of the electrical connection box 42 are 
respectively connected with the male terminal of the connector terminal 
unit 19 and the male terminal of the motor relay 17, and at the same time, 
the motor side connecting portion 43c is inserted into the insertion holes 
53, 54. Then the lower case 12 is caulked to the lower side opening 28 of 
the upper case 11. In this way, the electronic control unit 1 is 
assembled. 
The male terminal 58 of each solenoid valve 4 of the hydraulic unit 2 is 
previously connected with the solenoid connector 59. Under the condition 
that the rubber ring 65 is attached to the outer circumferential edge of 
the flange base 59a and that the rubber ring 52 is attached onto the 
annular wall 51, the hydraulic unit 2 is placed at a predetermined 
position on the electronic control unit 1, and each male terminal 45 of 
the motor 7 is connected with each relay terminal 46 of the motor side 
connecting portion 43c, and further each male terminal 66 of the solenoid 
connector connecting portion 60 is connected with each relay terminal 61 
of the solenoid connector 59, and furthermore they are fastened by the 
bolt 31 having a flange and the bolt 70. In this way, the electronic 
control unit 1 and the hydraulic unit 2 are integrated with each other. 
As described above, the connector connecting portion 11b on the electronic 
control unit 1 side with which the external connector 14 is connected is 
extended from a clearance formed between the upper face of the upper case 
11 of the electronic control unit 1 and the motor 7 of the hydraulic unit 
2, and the relatively large motor relay 17 and the fail-safe relay 18 are 
arranged at the position of the relay accommodating portion 11a provided 
in the clearance formed between the upper face of the upper case 11 and 
the motor 7 of the hydraulic unit 2. Accordingly, it is possible to 
effectively utilize a dead space formed between the upper face of the 
upper case 11 of the electronic control unit 1 and the motor 7, and also 
it is possible to form the upper case 11 to be flatter, so that the entire 
electronic control unit integrated with a hydraulic unit can be made 
compact. 
On the wall 11c of the connector connecting portion 11b opposed to the 
hydraulic housing 3 of the hydraulic unit 2, there is provided a 
ventilation hole portion 21 having air-permeability and liquid-tightness. 
Due to the action of the above ventilation hole portion 21, it is possible 
to reduce a difference between the atmospheric pressure inside the case 5 
of the electronic control unit 1 and the atmospheric pressure outside the 
case 5 when the pressure difference is made by a temperature change, and 
further it is possible to prevent water from entering the case 5. In this 
case, the ventilation hole portion 21 on the wall 11c is arranged being 
opposed to the hydraulic housing 3 leaving a small clearance between the 
ventilation hole portion 21 and the hydraulic housing 3. Therefore, water 
is not directly splashed on the ventilation hole portion 21, and further 
the ventilation hole portion 21 is not contacted with other members. 
Accordingly, damage of the ventilation hole portion 21 can be effectively 
prevented. 
Further, the case 5 of the electronic control unit 1 is composed of the 
upper case 11 and the lower case 12, and the lower case 12 is caulked to 
the upper case 11 via the sealing agent 33 provided along the 
circumferential edge of the lower opening 28 of the upper case 11. 
Accordingly, the working property of assembling can be enhanced. 
The upper case 11 is made of aluminum by means of die casting, and the 
lower case 12 is made of a metallic sheet by means of sheet metal forming. 
Accordingly, the cases 11, 12 can be easily manufactured, and the 
manufacturing cost can be reduced. 
Further, when the hydraulic unit 2 is integrally connected with the 
electronic control unit 1, the male terminal 45 protruding downward at a 
position inside the annular wall portion 51 which protrudes in the lower 
portion of the motor 7, is connected with the relay terminal 46 on the 
electronic control unit 1 side, and further the rubber ring 52 attached to 
the annular wall portion 51 is compressed by the upper face of the upper 
case 11 of the electronic control unit 1. In this way, when the electronic 
control unit 1 is integrally connected with the hydraulic unit 2, the 
terminal 45 on the motor 7 side and the terminal 46 on the electronic 
control unit 1 side can be connected and the connecting portion can be 
easily sealed. 
The chamber 35b, in which no brake fluid is stored, in the buffer chamber 
35 provided in the hydraulic housing 3, is arranged facing the lower face 
of the hydraulic housing 3, and on the upper face of the upper case 11 of 
the electronic control unit 1, there is formed a communication groove 40 
for communicating the chamber 35b, in which no brake fluid is stored, with 
the outside air. Accordingly, the chamber 35b, in which no brake fluid is 
stored, can be open to the atmosphere via the communicating groove 40, so 
that the piston 36 can be smoothly operated. Further, it is possible to 
let the brake fluid escape outside which has leaked from a clearance 
between the piston 36 and the inner circumferential wall face of the 
buffer chamber 35. 
At the center of the upper case 11, there is provided a bolt insertion 
cylinder portion 26 which extends to the lower case 12. When the hydraulic 
unit 2 is integrated with the electronic control unit 1 by the bolt 31 
having a flange, a clearance between the bolt insertion cylindrical 
portion 26 and the lower case 12 is sealed by the rubber ring 27. 
Accordingly, airtightness of the case 5 can be maintained by the rubber 
ring 27, and further the center of the lower case 12 can be supported by 
the bolt insertion cylindrical portion 26, and rigidity of the entire case 
5 can be enhanced. 
Heat generating members 55 such as a regulator are mounted on the 
conductive portion 56 provided on the printed mounting board 16 in such a 
manner that the heat generating members 55 come into contact with the 
conductive portion 56. Since the conductive portion 56 comes into contact 
with the upper case 11, heat generated by heat generating members 55 such 
as a regulator can be effectively dissipated outside the electronic 
control unit 1 via the conductive portion 56 and the upper case 11. 
In the above embodiment, the connector connecting portion 11b extends to 
the side with respect to the clearance between the upper face of the upper 
case 11 and the motor, however, as shown by an imaginary line in FIG. 7, 
the connector connecting portion 11b may be extended obliquely upward, and 
the extending direction may be appropriately determined by a positional 
relation between the connector connecting portion 11b and the external 
connector 14. 
Further, the female solenoid connector 59 has a T-shaped female--female 
relay terminal 61, at both ends of which the female connecting portions 
61a are provided. One of the female connecting portions 61a of the 
female--female relay terminal 61 is connected with the male terminal 58 
protruding from the hydraulic housing 3. The other female connecting 
portion 61a of the female--female relay terminal 61 is connected with the 
male terminal 66 on the electronic control unit 1 side. When quality 
control and transportation of the hydraulic unit 2 is conducted under the 
condition that the male terminal 58 on the solenoid coil side protruding 
from the lower face of the hydraulic housing 3 of the hydraulic unit 2 is 
connected with one of the female connecting portions 61a of the 
female--female relay terminal 61 of the female solenoid connector 59, the 
male terminal 58 and female--female relay terminal 61 are not directly 
protruded and exposed outside. Therefore, the male terminal 58 and 
female--female relay terminal 61 can be protected by the resin housing of 
the female solenoid connector 59. Accordingly, it is possible to 
effectively prevent the male terminal 58 and female--female relay terminal 
61 from being damaged when they come into contact or collide with other 
members. Therefore, quality control can be easily conducted. 
When the U-shaped female--female relay terminal 61 is used, the following 
effects can be provided. In the connection of the male terminal 58 on the 
solenoid coil side in the hydraulic housing 3 with male terminal 66 on the 
electronic control unit 1 side, the positional allowance of the distance L 
(shown in FIG. 37) between both terminals can be absorbed, so that the 
degree of freedom can be increased when the electronic control unit 1 and 
the hydraulic unit; 2 are positioned. 
Since the female--female relay terminal 61 is bent into a U-shape, the 
connecting structure can be made compact in the upward and downward 
direction. 
In the U-shaped female--female relay terminal 61 of the female solenoid 
connector 59, the female connecting portion 61a with which the male 
terminal 58 on the movable solenoid coil side is connected is formed into 
a faston-shape and not fixed to the resin housing. The female connecting 
portion 61a with which the male terminal 66 on the electronic control unit 
1 side is connected is formed into a tongue-shape and fixed to the resin 
housing. Accordingly, when the pressure of brake fluid is applied to the 
master cylinder, the male terminal 58 on the solenoid coil side is 
slightly moved in the upward and downward direction. However, since the 
male terminal 58 on the solenoid coil side is connected with the 
faston-shaped female connecting portion 61a of the female--female relay 
terminal 61, the contact pressure of which is high, and since this female 
connecting portion 61a is not fixed to the resin housing, the male 
terminal 58 and female connecting portion 61a are integrally moved in the 
upward and downward direction, so that the relative sliding motion can be 
prevented. Therefore, the occurrence of fretting corrosion can be 
effectively prevented. 
Further, in the resin housing of the female solenoid connector 59, there is 
provided a positioning pin 63. In the hydraulic housing 3, at a position 
corresponding to the above positioning pin 63, there is provided a 
positioning hole 64. When the positioning pin 63 of the female solenoid 
connector 59 is press-fitted into the above positioning hole 64, the 
female solenoid connector 59 can be mechanically connected with the 
hydraulic housing 3. That is, positioning can be easily conducted and they 
can be easily connected with each other by means of press-fitting. 
Further, the connecting structure is simple, and the connecting structure, 
the dimensions of which are small, can be provided at low cost. 
The male terminal 66 on the electronic control unit 1 side is formed into a 
U-shape, and the side of the male terminal with which the female solenoid 
connector 59 is not connected is soldered 66a to the printed mounting 
board 16. Therefore, when the female connecting portion 61a of the 
female--female relay terminal 61 is attached to the male terminal, or when 
the female--female relay terminal 61 is subjected to thermal expansion or 
shrinkage, stress caused in the soldered portion 66a, in which the male 
terminal 66 is soldered to the printed mounting board 16, can be reduced. 
Further, the resin housing of the male solenoid connector 60 to fix the 
male terminal 66 onto the electronic control unit 1 side is locked by the 
upper case 11 made of aluminum, the engaging piece 60b and the extending 
piece 60c. Therefore, when the female solenoid connector 59 is inserted 
into or drawn out from the male solenoid connector 60, the resin housing 
of the male solenoid connector 60 can be effectively fixed to the upper 
case 11. Therefore, stress caused in the soldered portion 66a, in which 
the male terminal 66 is soldered to the printed mounting board 16, can be 
reduced. 
Further, there are provided protrusions on the resin housing of the male 
solenoid connector, and there are formed holes corresponding to the above 
protrusions, on the printed mounting board and the electronic control unit 
case. When the protrusions are inserted into the holes in the process of 
assembling, the male solenoid connector can be positioned to the 
electronic control unit case. In this way, the male solenoid connector can 
be directly positioned to the electronic control unit case, and further 
the above positioning arrangement can be effectively utilized when the 
printed mounting board is temporarily fixed to the male solenoid 
connector. 
Further, in the female solenoid connector 59, there is provided a flange 
base portion 59a for holding the rubber ring 65 on the lower face of the 
hydraulic housing 3. Therefore, when the electronic control unit 1 is 
integrated with the hydraulic unit 2, the seal step portion 68, in which 
the flange base portion 59a is engaged and the rubber ring 65 is closely 
contacted, can be formed at a corresponding position on the upper case 11. 
Accordingly, the rubber ring 65 can be easily positioned and attached, and 
the assembling workability can be enhanced. 
The engaging piece 60b of the male solenoid connector 60 is engaged with 
the upper case 11 being locked, so that the male solenoid connector 60 is 
engaged with and held by the upper case 11 in the connecting structure of 
the embodiment. However, the same effect can be provided when the engaging 
piece to be engaged and locked with the printed mounting board 16 is 
provided in the male solenoid connector 60, and the male solenoid 
connector 60 is engaged with and held by the printed mounting board 16. 
According to the electronic control unit integrated with a hydraulic unit 
in an anti-lock brake system arranged in the manner described above, the 
electrical circuit for supplying electrical power to the motor 7 is 
composed of a battery 108, a male terminal 80 for supplying electrical 
power source to the motor, bus bar 49, male terminal 130b for the motor 
relay, motor relay 17, male terminal 130a for the motor relay, bus bar 48, 
male terminal 45 for supplying electrical power source to the motor, motor 
7, male terminal 45 for feeding electrical power to the motor, bus bar 47, 
and male terminal 80 for feeding electrical power to the motor. 
Accordingly, the electrical circuit has a sufficiently large electrical 
current capacity for driving the motor 7. Since this electrical circuit 
can be composed only when the male terminals 45, 80, 130a, 130b are 
respectively inserted into the relay terminals 46 of the electrical 
connection box 42, the assembling work is simple and the connecting 
structure is compact. 
The male terminals 45, 80, 130a, 130b are respectively held by the relay 
terminals 46 in such a manner that the male terminals 45, 80, 130a, 130b 
can be freely slid in the arranging direction. Accordingly, even when the 
printed wiring board 16, bus bar holding case 43, bus bars 47, 48, 49 are 
displaced due to a difference of the thermal expansion coefficient, it is 
possible for the male terminals 45, 80, 130a, 130b to be electrically 
contacted with the relay terminals 46 and bus bars 47, 48, 49 in a good 
electrical contact condition. This is very effective when the electronic 
control unit integrated with a hydraulic unit is disposed at a position in 
the engine room of an automobile where the temperature is greatly changed. 
There are formed guide faces 138b at the engaging protrusions 138a provided 
at the ends of the holding portion 138 for holding the bus bars 47, 48, 
49, wherein the intervals of the guide faces 138b are reduced inward. On 
the other hand, since both sides on the upper faces of the bus bars 47, 
48, 49 are chamfered, the holding portion 138 is uniformly extended to 
both sides when the bus bars 47, 48, 49 are inserted. Accordingly, it is 
possible to prevent the holding portion 38 from extending only onto one 
side, and damage of the holding portion 138 can be effectively prevented. 
Since the bus bars 47, 48, 49 can freely slide in the longitudinal 
direction being locked in such a manner that they can not be drawn out, 
there is no possibility that strain is caused between the bus bars due to 
a difference between the thermal expansion coefficients of the bus bars 
47, 48, 49 and the thermal expansion coefficient of the holding case 43. 
Therefore, it is possible to positively fix and hold the bus bars. It is 
also possible to prevent the bus bars 47, 48, 49 from being disconnected 
from the electrical connection box 42 and coming into contact with the 
lower case 12. 
The male terminals 130a, 130b for the motor relay are attached onto the 
printed wiring board 16 in such a manner that the intermediate portions of 
the male terminals are inserted into the holding holes 133 from the lower 
side and bent onto the upper face side of the printed wiring board 16. 
Therefore, in the assembling work in which the male terminals 130a, 130b 
for the motor relay are connected with the electrical connection box 42, 
it is possible to reduce an intensity of the external force applied to the 
soldered portion on the base side of the male terminals 130a, 130b for the 
motor relay. 
Since the insulating spacer 135 is provided between the male terminals 
130a, 130b for the motor relay and the relay accommodating portion 11a of 
the case 5, it is possible to prevent the circuit of the anti-lock brake 
system from being short-circuited because the insulating spacer 135 comes 
into contact with the upper case 11 made of aluminum. 
In this embodiment, the male terminals 45, 80, 130a, 130b are aligned on 
the same straight line, however, they are not necessarily aligned on the 
same straight line. That is, when the bus bars 47, 48, 49 are 
appropriately provided in accordance with the positions of the male 
terminals 45, 80, 130a, 130b, it is possible to form a circuit capable of 
supplying a high intensity of electrical current to the motor. Further, 
each male terminal may be replaced with a female terminal. 
In the above embodiment, the male terminals 130a, 130b for the motor relay 
are fixed onto the printed wiring board 16 by the holding portion 138. 
However, the following fixing means may be adopted. Protrusions may be 
formed on the printed wiring board 16 and inserted into intermediate 
portions of the male terminals 130a, 130b for the motor relay, and the end 
portions of the protrusions may be fused for fixing. 
According to the electronic control unit in an anti-lock brake system 
arranged in the manner described above, the connector terminal unit 19 is 
engaged with the inside of the connector housing 11b from the lower side. 
Accordingly, it is not necessary to provide a large space at the rear of 
the connector housing 11b in the assembling work. Under the condition that 
the engaging protrusion 77 provided on the upper face of the connector 
terminal unit 19 is engaged with the engaging step portion 76 of the 
connector housing 11b in the inserting direction of the external connector 
14, the bottom plate 19b is put on the lower side of the attaching pieces 
82, 85, and the positioning protrusion 84 is inserted into the positioning 
hole of the attaching piece 85, and at the same time the screw 82a is set 
in the screw inserting hole 83 and screwed to the screw hole of the 
attaching piece 82. In this way, the connector terminal unit 19 is 
accommodated and disposed in the connector housing 11b. Therefore, only 
the lower side of the connector terminal unit 19 may be screwed. 
Accordingly, the attaching structure of the connector terminal unit 19 can 
be made compact. Further, the screw is attached only from the lower side 
on which the upper case 11 is open. Therefore, the attaching work is easy. 
In this connection, the engaging protrusion 77 of the connector terminal 
unit 19 is engaged with the engaging step portion 76 in the inserting 
direction of the external connector 14. Accordingly, the connector 
terminal unit can resist an insertion force applied when the external 
connector 14 is connected. 
Since the connector housing 11b is formed integrally with the upper case 11 
in the embodiment, it is not necessary to separately form the connector 
housing 11b, so that the formation of the connector housing is easy. 
Further the water proofing property of the connector housing 11b can be 
enhanced as compared with a case in which the connector housing 11b is 
separately formed. 
Since the terminal portion 75a of the connector terminals 75 is soldered to 
the auxiliary wiring board 86 under the condition that the auxiliary 
wiring board 86 is held by the elastic hook 90 in the embodiment, 
soldering can be easily conducted, and after the completion of soldering, 
the external force is absorbed by the elastic hook 90, so that the 
intensity of the external force applied to the soldered portion can be 
reduced. Since the auxiliary wiring board 86 is held on the reverse side 
of the connector terminal unit 19 under the condition that the auxiliary 
wiring board 86 is locked, even when the connector terminal 75 is 
thermally expanded, the elastic hook 90 made of resin, the thermal 
expansion coefficient of which is higher than that of the terminal portion 
75a made of metal, is elongated longer than the terminal portion 75a. 
Accordingly, there is formed a small clearance between the hook 90a and 
the reverse side of the connector terminal unit 19. Therefore, it is 
possible for the printed wiring board 16 to go back into the clearance. 
For this reason, a thermal expansion force is not applied to the soldered 
portion in which the connector terminal 75 is soldered to the auxiliary 
wiring board 86. 
In this embodiment, the fixing portion of the above connector terminal unit 
19 is formed into a box-shape when the bottom plate 19b is supported by 
the side wall 81a and the rear wall 81b. However, even when the main body 
19a is directly screwed to the connector housing 11b, it is also possible 
to make the attaching structure of the connector terminal unit 19 compact. 
In this embodiment, the fixing portion is fixed to the attaching portion by 
means of fastening screws, however, it is also possible to adopt the means 
of fastening bolts or fusing. 
As described above, the connector terminal unit 19, the printed mounting 
board 16, the electrical connection box 42 and the solenoid connector 
connecting portion 60, which are accommodated in the case 5 of the 
electronic control unit 1, are directly fixed to the rigid upper case 11 
made of aluminum by means of die casting. That is, this assembling system 
is based on the upper case 11. Therefore, it is sufficient to give 
consideration to the manufacturing errors caused between the members 16, 
19, 42, 60 and the upper case 11. As compared with a system in which the 
members 16, 19, 42, 60 are fixed to the upper case 11 under the condition 
that they are previously assembled, the manufacturing errors of the 
members 16, 19, 42, 60 are not accumulated, so that the assembling 
allowance can be reduced. Therefore, the assembling accuracy of the 
electronic control unit 1 can be enhanced. 
In the solenoid connector 59, there is provided a U-shaped relay terminal 
61, both end portions of the linking portion 61b of which respectively 
have the female connecting portions 61a. One of the female connecting 
portions 61a of each relay terminal 61 in the solenoid connector 59 is 
respectively connected with each male terminal 58 protruding from the 
hydraulic housing 3, and the other female connecting portion 61a of each 
relay terminal 61 in the solenoid connector 59 is respectively connected 
with each male terminal on the electronic control unit 1 side. Under the 
condition that each male terminal 58 on each solenoid valve 4 side 
protruding from the lower face of the hydraulic housing 3 of the hydraulic 
unit 2 is inserted into and connected with one of the female connecting 
portions 61a of each relay terminal 61 in the solenoid connector 59, 
quality control or transportation of the hydraulic unit 2 is conducted, 
and the male terminals 58 and relay terminals 61 are not directly 
protruded outside. Therefore, they do not come into contact or collide 
with other members and the occurrence of damage can be effectively 
prevented and quality control can be easily carried out. 
In this system, each male terminal 58 on each solenoid valve 4 side and 
each male terminal 66 on the electronic control unit 1 side are connected 
with each other by the substantially U-shaped relay terminal 61, both end 
portions of which respectively have the female connecting portions 61a. 
According to this connecting system, the degree of freedom can be 
increased by the linking portion 61b when the electronic control unit 1 
and the hydraulic unit 2 are positioned to each other. 
Since the relay terminal 61 is bent into a U-shape, as compared with a case 
in which the female connecting portions 61a are arranged on a straight 
line, the connecting structure can be made compact in the upward and 
downward direction when the electronic control unit and the hydraulic unit 
2 are integrated with each other. 
The relay terminal 61 is accommodated and held by the solenoid connector 59 
under the condition that the displacement of the female connecting portion 
61a is allowed. Under the condition that each male terminal 58 on each 
solenoid valve 4 side is respectively connected with each female 
connecting portion 61a, the female connecting portion 61a is also moved in 
the upward and downward direction in accordance with the upward and 
downward motion of each male terminal 58 caused by the solenoid valve 4. 
Due to the foregoing, the upward and downward motion of each male terminal 
58 can be effectively absorbed, and the occurrence of fretting corrosion 
caused between the male terminal 58 and the female connecting portion 61a 
can be effectively prevented. 
In the case 5, there is provided a solenoid connector connecting portion 60 
having an engaging recess 60a with which the solenoid connecting portion 
59b of the solenoid connector 59 is engaged. In the solenoid connector 
connecting portion 60, there is provided an engaging piece 60b which is 
engaged with and held by the case 5, and into the engaging recess 60a, 
there is protruded a male terminal 66 on the electronic control unit 1 
side. In the connection of the male terminal 66 on the electronic control 
unit 1 side with the male terminal 58 on the solenoid valve 4 side 
conducted via the relay terminal 61, in the case where each engaging 
recess 60a of the solenoid connector connecting portion 60 is engaged with 
each solenoid connecting portion 59b, a load imposed on the connecting 
structure in the process of engagement is mainly received by the engaging 
piece 60b. Accordingly, the load is not given to the soldered portion of 
the male terminal 66 on the printed mounting board 16 side. Therefore, 
damage of the soldered connecting portion can be effectively prevented. 
On the lower face of the hydraulic housing 3 in the solenoid connector 59, 
there is provided a flange base portion 59a for holding the rubber ring 
65. At a corresponding position of the upper case 11, there is provided a 
seal step portion 68 with which the above flange base portion 59a is 
engaged and the rubber ring 65 closely comes into contact when the 
electronic control unit 1 is integrated with the hydraulic unit 2. Due to 
the above arrangement, it is easy to position and attach the rubber ring 
65 to the hydraulic housing 3. Therefore, the assembling work property can 
be enhanced. 
In the above embodiment, the connector connecting portion 11b extends to 
the side with respect to the clearance between the upper face of the upper 
case 11 and the motor, however, as shown by an imaginary line in FIG. 7, 
the connector connecting portion 11b may be extended obliquely upward, and 
the extending direction may be appropriately determined by a positional 
relation between the connector connecting portion 11b and the external 
connector 14. 
The lower case 12 is made of a metal sheet by means of sheet metal forming, 
however, it may be made of aluminum. 
As described above, according to the connecting structure of the connector 
terminal unit with the wiring board of the present invention, the posture 
and position of the connector terminal unit can be freely adjusted within 
the length of the flexible wire. Accordingly, it is possible to 
accommodate the connector terminal in the connector housing in accordance 
with the position of the connector housing which changes in a wide range. 
Therefore, for example, even when it is necessary to change the position 
of the connector housing in order to change the design, it is unnecessary 
to change the connecting structure of the connector terminal unit and the 
wiring board. Further, since the wiring board is electrically connected 
with the connector terminal unit via the flexible wire, relative positions 
of the wiring board and the connector terminal can be arbitrarily 
determined. Consequently, it is possible to electrically connect the 
wiring board with the connector terminal unit irrespective of the errors 
caused in the process of manufacturing the wiring board and also 
irrespective of the errors caused in the process of assembling the wiring 
board to the case, and further the allowance can be extended with respect 
to the errors. 
When the flexible wire is composed of a flat cable as shown in the 
embodiment, it is easy to electrically connect a large number of connector 
terminals with the wiring board. Therefore, the assembling efficiency can 
be enhanced. 
According to the assembling method for assembling the connector terminal 
unit to the wiring board of the present invention, the wiring board and 
the auxiliary wiring board are integrally formed in such a manner that 
they can be arbitrarily detached from each other. Therefore, the wiring 
board and the auxiliary wiring board can be easily formed. Further, before 
they are separated from each other, each wiring board is connected with a 
flexible wire. Therefore, the flexible wire can be easily connected to the 
wiring board, and the efficiency of assembling work can be enhanced. 
As described above, in the electronic control unit integrated with a 
hydraulic unit in an anti-lock brake system of the present invention, a 
connecting portion of the connector on the electronic control unit side to 
which an external connector for supplying electrical power is connected is 
arranged being extended in a clearance formed between an upper face of the 
case of the electronic control unit and the motor. Accordingly, a dead 
space formed between the upper face of the case of the electronic control 
unit and the motor can be effectively utilized and the overall electronic 
control unit integrated with a hydraulic unit can be made compact. 
On the wall of the case of the electronic control unit, which is not 
horizontal, opposed to the hydraulic housing of the hydraulic unit, there 
is provided a ventilation hole portion having air-permeability and 
liquid-tightness. Due to the action of the above ventilation hole portion, 
it is possible to reduce a difference between the atmospheric pressure 
inside the case of the electronic control unit and the atmospheric 
pressure outside the case when the pressure difference is caused by a 
temperature change, and further it is possible to prevent water from 
entering the case. In this case, the ventilation hole portion on the case 
wall is arranged being opposed to the hydraulic unit. Therefore, water is 
not directly splashed on the ventilation hole portion, and further the 
ventilation hole portion is not contacted with other members. Accordingly, 
damage of the ventilation hole portion can be effectively prevented. 
Further, the case of the electronic control unit is composed of the upper 
case and the plate-shaped lower case which closes an opening on the lower 
side of the upper case, and the lower case is caulked to the upper case 
via the sealing agent provided along the circumferential edge of the lower 
opening of the upper case. Accordingly, the working property of assembling 
can be enhanced. 
The upper case is made of aluminum by means of die casting, and the lower 
case is made of a metallic sheet by means of sheet metal forming. 
Accordingly, the cases can be easily manufactured, and the manufacturing 
cost can be reduced. 
Further, when the hydraulic unit is integrally connected with the 
electronic control unit, the terminal protruding downward at a position 
inside the annular wall portion which protrudes in the lower portion of 
the motor, is connected with the relay terminal on the electronic control 
unit side, and further the rubber ring attached to the annular wall 
portion is compressed by the upper face of the upper case of the 
electronic control unit. In this way, when the electronic control unit is 
integrally connected with the hydraulic unit, the terminal on the motor 
side and the terminal on the electronic control unit side can be connected 
and the connecting portion can be easily sealed. 
There is provided a buffer chamber in the hydraulic housing for temporarily 
storing the brake fluid when the anti-lock brake is operated. Facing the 
lower side of the hydraulic housing, there is provided a chamber in which 
no brake fluid is stored being partitioned by a piston in the buffer 
chamber. On the upper case of the electronic control unit, there is 
provided a communicating groove for communicating the chamber in which no 
brake fluid is stored with the outside air. According to the above 
structure, the chamber in which no brake fluid is stored can be open to 
the atmospheric air through the communicating groove, so that the piston 
can be moved smoothly, and further the brake fluid which has leaked out 
from a clearance between the piston and the inner circumferential face of 
the buffer chamber can be allowed to escape outside. 
Further, at the center of the upper case, there is provided a bolt 
inserting cylindrical portion which is arranged from the center of the 
upper case to the lower case. In order to integrally connect the hydraulic 
unit with the electronic control unit, bolts are inserted into from the 
lower case to the upper case through the bolt inserting cylindrical 
portion, and the hydraulic unit is fastened by these bolts, and a 
clearance between the bolt inserting cylindrical portion and the lower 
case is sealed by the rubber ring. Due to the above structure, the case 
can be hermetically sealed by the rubber ring, and further the center of 
the lower case is supported by the bolt inserting cylindrical portion so 
that the rigidity of the entire case can be enhanced. 
The electronic control unit has a printed mounting board, and heat 
generating members such as a regulator are mounted on the conductive 
portion provided on the printed mounting board in such a manner that the 
heat generating members come into contact with the conductive portion, and 
further the conductive portion comes into contact with the upper case. Due 
to the above arrangement, heat generated by the heat generating members 
such as a regulator can be effectively dissipated outside via the upper 
case. 
The electronic control unit integrated with a hydraulic unit in an 
anti-lock brake system of the present invention comprises a solenoid 
female connector composed of a U-shaped female--female relay terminal and 
a resin housing. In this case, the U-shaped female--female relay terminal 
has female connecting portions at both ends with which male terminals on 
the solenoid coil side and male terminals connected with the print 
mounting board on the electronic control unit side are connected. 
Therefore, the hydraulic unit and the electronic control unit are 
mechanically connected with each other via the solenoid female connector, 
and at the same time the male terminals on the solenoid coil side and the 
electronic control unit are electrically connected. When quality control 
and transportation of the hydraulic unit is conducted under the condition 
that the male terminals on the solenoid coil side protruding from the 
lower face of the hydraulic housing of the hydraulic unit are connected 
with one of the female connecting portions of the female--female relay 
terminal of the solenoid female connector, male terminals do not protrude 
outside directly, but they can be protected by the resin housing. 
Accordingly, it is possible to prevent the male terminals from contacting 
or colliding with other parts, so that the male terminals can be prevented 
from being damaged. As a result, quality control can be easily carried 
out. When the U-shaped female--female relay terminals are used, in the 
connection of the male terminals on the solenoid coil side in the 
hydraulic housing with the male terminals on the electronic control unit 
side, it is possible to absorb a positional error which is in a range of 
allowance. Accordingly, the degree of freedom can be enhanced in the 
process of positioning the electronic control unit and the hydraulic unit. 
Since the female--female relay terminal is bent into a U-shape, it is 
possible to reduce the height of the connecting structure, so that the 
overall structure can be made compact. 
In the U-shaped female--female relay terminal of the female solenoid 
connector, the female connecting portion with which the male terminal on 
the movable solenoid coil side is connected is formed into a faston-shape 
and not fixed to the resin housing. The female connecting portion with 
which the male terminal on the electronic control unit side is connected 
is formed into a tongue-shape and fixed to the resin housing. According to 
the above structure, when the pressure of brake fluid is applied to the 
master cylinder, the male terminal on the solenoid coil side is slightly 
moved in the upward and downward direction. However, since the male 
terminal on the solenoid coil side is connected with the faston-shaped 
female connecting portion of the female--female relay terminal, the 
contact pressure of which is high, and since this female connecting 
portion is not fixed to the resin housing, the male terminal and female 
connecting portion are integrally moved in the upward and downward 
direction, so that the relative sliding motion can be prevented. 
Therefore, the occurrence of fretting corrosion can be effectively 
prevented. 
Further, in the resin housing of the female solenoid connector, there is 
provided a protrusion. In the hydraulic housing, at a position 
corresponding to the above protrusion, there is provided a positioning 
hole. When the protrusion of the female solenoid connector is press-fitted 
into the above positioning hole, the female solenoid connector can be 
mechanically connected with the hydraulic housing. Due to the above 
structure, positioning can be easily conducted and they can be easily 
connected with each other by means of press-fitting. Further, the 
connecting structure is simple, and the connecting structure, the 
dimensions of which are small, can be provided at low cost. 
The male terminal on the electronic control unit side is formed into a 
U-shape, and the side of the male terminal with which the female solenoid 
connector is not connected is soldered to the printed mounting board 16. 
Therefore, when the female connecting portion of the female--female relay 
terminal is attached to the male terminal, or when the female--female 
relay terminal is subjected to thermal expansion or shrinkage, stress 
caused in the soldered portion, in which the male terminal is soldered to 
the printed mounting board, can be reduced. 
Further, the resin housing of the male solenoid connector to fix the male 
terminal on the electronic control unit side is locked by the upper case 
made of metal. Therefore, when the female solenoid connector is inserted 
into or drawn out from the male solenoid connector, the resin housing can 
be effectively fixed to the case of the electronic control unit. 
Therefore, stress caused in the connecting portion, in which the male 
terminal is connected to the printed mounting board, can be reduced. 
Further, there are provided protrusions on the resin housing of the male 
solenoid connector, and there are formed holes corresponding to the above 
protrusions, on the printed mounting board and the electronic control unit 
case. When the protrusions are inserted into the holes in the process of 
assembling, the male solenoid connector can be positioned to the 
electronic control unit case. In this way, the male solenoid connector can 
be directly positioned to the electronic control unit case, and further 
the above positioning arrangement can be effectively utilized when the 
printed mounting board is temporarily fixed to the male solenoid 
connector. 
Further, in the female solenoid connector, there is provided a flange base 
portion for holding the rubber ring on the lower face of the hydraulic 
housing. Therefore, when the electronic control unit is integrated with 
the hydraulic unit, the seal step portion, in which the flange base 
portion is engaged and the rubber ring is closely contacted, can be formed 
at a corresponding position on the upper case of the electronic control 
unit. Accordingly, the rubber ring can be easily positioned and attached, 
and the assembling workability can be enhanced. 
As described above, according to the electronic control unit integrated 
with a hydraulic unit in an anti-lock brake system of the present 
invention, the motor power source supplying terminal, the motor relay 
terminal and the motor power feeding terminal are electrically connected 
with each other via the bus bar. Therefore, it is possible to form a 
circuit, the electrical current capacity of which is high, and a high 
intensity of electrical current can be made to flow in the circuit. 
Even when the bus bar expands and contracts due to a change in the 
temperature caused in the bus bar, the bus bar can be electrically 
connected with each terminal via the relay terminal in a good electrical 
condition. This is very effective when the electronic control unit 
integrated with a hydraulic unit is disposed at a position in the engine 
room of an automobile where the temperature is greatly changed. 
Since the terminal for the motor relay is directly fixed onto the printed 
wiring board, a load imposed on the soldered portion can be reduced. 
Therefore, it is possible to prevent the motor relay from being 
disconnected from the motor relay connecting terminal in the process of 
assembling. 
Further, even if the case is made of metal, it is possible to prevent a 
short-circuit between the case and the motor relay terminal. 
As described above, according to the electronic control unit integrated 
with a hydraulic unit in an anti-lock brake system of the present 
invention, only when the other side of the main body of the connector 
terminal unit is adhered, it is possible to fix the connector terminal 
unit to the connector housing. Accordingly, the attaching structure of the 
connector terminal unit can be made compact. Therefore, the entire 
electronic control unit integrated with a hydraulic unit can be made 
compact. 
When the connector housing is integrated with the case, the number of parts 
is reduced, so that the connector can be easily formed. 
When the auxiliary board is held by the elastic hook in such a manner that 
the auxiliary board can be locked, an intensity of the external force 
applied to the connector that has been soldered to the auxiliary wiring 
board can be reduced by the action of the elastic hook. Therefore, the 
soldered portion is not disconnected from the auxiliary wiring board, and 
a good electrical contact condition can be always provided. 
According to the electronic control unit integrated with a hydraulic unit 
in an anti-lock brake system of the present invention, the electronic 
control section includes a printed mounting board. The case of the 
electronic control unit is composed of an upper case made of aluminum by 
means of die casting and a plate-shaped lower case which closes an opening 
portion on the lower side of the upper case. In the upper case, there is 
provided a connector connecting portion with which the external connector 
for supplying electrical power is connected. The external connector is 
electrically connected with the connector connecting portion of the upper 
case, and the connector terminal unit is fixed, and the printed mounting 
board is fixed to the upper case. Further, an electrical connection box is 
fixed to the upper case, wherein the electrical connection box composes a 
motor drive circuit when the connecting terminals on the connector 
terminal unit side, the motor relay side on the printed mounting board and 
the motor side are connected with each other. In the solenoid connector 
connecting portion provided with the connecting terminal on the electronic 
unit side with which the connecting terminal on the solenoid valve side is 
connected, there is provided an engaging portion engaged with and held by 
the upper case. According to the present invention, the connector terminal 
unit, the printed mounting board, the electrical connection box and the 
solenoid connector connecting portion are directly fixed to the upper case 
made of aluminum by means of die casting. Due to the above assembling 
system, it is sufficient to give consideration to the manufacturing error 
caused between each member and the upper case. Accordingly, as compared 
with an assembling system in which the members are fixed to the upper case 
under the condition that they have already been assembled, the 
manufacturing errors of the members are not accumulated, and the assembly 
allowance can be reduced. Therefore, the assembling accuracy of the 
electronic control unit can be enhanced. 
When the lower case is caulked to the upper case through a sealing agent 
provided at the circumferential edge of the lower opening of the upper 
case, the assembling work property can be enhanced. 
When the lower case is made of a metallic sheet by means of sheet metal 
forming, it is easy to manufacture the lower case, so that the 
manufacturing cost can be reduced. 
Further, a connecting portion of the connector on the electronic control 
unit side to which an external connector is connected is arranged being 
extended in a clearance formed between the upper face of the case of the 
electronic control unit and the motor. Accordingly, a dead space formed 
between the upper face of the case of the electronic control unit and the 
motor can be effectively utilized and the overall electronic control unit 
integrated with a hydraulic unit can be made compact.