A lever-type electrical connector has a moving support plate 15 to prevent bending of protruding male terminals of a male connector housing 11. The support plate 15 has external flanges 20,42 to prevent inward movement of cam pins 18,41 due to the application of external force to the base of the support plate 15. The plate 15 may have a continuous upstanding wall 17 to further resist distortion due to external force.

TECHNICAL FIELD 
The present invention relates to a lever-type electrical connector. 
BACKGROUND TO THE INVENTION 
As shown in FIGS. 10 and 11 of this specification, a lever-type connector 
comprises a male connector housing 1 provided with a rotatable lever 2, 
and a moving plate 4 provided in such a manner that it can be moved within 
a hood member 3. This moving plate 4 is provided with positioning holes 4A 
which allow tabs (not shown) of male terminal fittings to be engaged 
therein. The moving plate 4 is provided with cam pins 5 which fit with cam 
grooves 2A of the lever 2, the operation of the lever 2 accordingly 
causing the plate 4 to move within the hood member 3. The cam pins 5 
protrude outwards from the upper edges of upstanding members 6 of the 
moving plate 4, and pass through grooves 7 formed in the hood member 3 to 
the exterior. 
The purpose of the moving plate is to resist bending of the exposed male 
terminals by an external object; as a female connector housing is 
attached, the plate is drawn inwardly to an inactive position. 
In this kind of lever-type connector, if a force is exerted from above on 
the moving plate 4 in the direction shown by the arrow F in FIG. 11, the 
plate 4 bulges in a downwards direction, and consequently the protruding 
members 6 incline sharply inwards in the direction shown by the arrows R. 
As a result the cam pins 5 move inwardly and there is the danger that they 
might come out of the cam grooves 2A. 
The present invention has been developed after taking the above problem 
into consideration and aims to present a lever-type connector in which the 
cam pins do not come out of the cam grooves if the moving plate bends. 
SUMMARY OF THE INVENTION 
According to the invention there is provided a lever-type electrical 
connector comprising a housing having a hood, a plurality of terminals 
protruding within the hood in a first direction, a support plate within 
said hood and having apertures through which individual terminals pass, 
and a lever pivotable on the housing, said hood having guide channels in 
opposite walls thereof and extending in said first direction, and said 
plate having opposite guide pins respectively extending through said 
channels to the exterior for engagement by said lever, such that pivoting 
of said lever moves said plate in said first direction in use 
characterized in that said guide pins have lateral protrusions at the 
respective outer ends thereof in order to prevent inward movement with 
respect to said hood. 
Such a construction has the advantage that the support plate is restrained 
at the outside, and thus the cam pins are prevented from disengagement 
with the lever. 
Preferably the cam pins are located on upstanding members of the support 
plate, most preferably a continuous peripheral wall. Such a construction 
gives improved support at the inside, and greater stiffness to the moving 
plate. 
The protrusions are preferably located in a recessed channel so as to be 
flush with the exterior surface of the hood. In this way the overall size 
of the connector is not increased.

DESCRIPTION OF PREFERRED EMBODIMENTS 
An embodiment one of the present invention is explained below with the aid 
of FIGS. 1 to 7. 
A lever-type connector is provided with a male connector housing 10, a 
female connector housing 30, a lever 22 and a moving plate 15. The male 
connector housing 10 has a hood member 11 located on the face uppermost in 
the figures, a plurality of tabs of male terminal fittings (not shown) 
protruding upwards from the interior of the hood member 11. This hood 
member 11 fits with the female connector housing 30. 
The hood member 11 has a plurality of positioning holes 16 and the moving 
plate 15 moves between an upper tab supporting position and a lower 
inactive position. When the male and female connector housings 10 and 30 
are not in a fitted state the moving plate 15 is temporarily retained (see 
FIGS. 2 to 4) in the tab supporting position by a stopping means (not 
shown) such as a resilient detent, and the positioning holes 16 fit with 
the anterior ends of the tabs, thus preventing inclination or bending 
thereof. As the fitting operation of the connector housings 10 and 30 (to 
be described later) proceeds, the moving plate 15 moves downwards (towards 
the interior of the hood member 11) and, when the connector housings 10 
and 30 are completely fitted, the moving plate 15 reaches the inactive 
position (shown in FIG. 5). 
An upstanding wall 17 is formed around the entire circumference of the 
moving plate 15, cam pins 18 protruding from both side edges of the 
central portions of this wall 17. Wall 17 is preferably a substantially 
continuous peripheral wall. Channels 19 are formed in these cam pins 18 
and on the upper edge of the wall 17, these channels 19 being open towards 
the upper end face and the inner face. The channels 19 fit with cam pins 
31 of the female connector housing 30. The cam pins 18 of the moving plate 
15 can move along recessed grooves or guide channels 12 formed in the hood 
member 11, the protruding edges (the end portions of the outer edges) of 
the cam pins 18 passing through the recessed grooves 12 and protruding 
towards the exterior. When the moving plate 15 is in the tab supporting 
position, the cam pins 18 are located in the upper ends of the recessed 
grooves 12 and when the moving plate 15 is in the inactive position, the 
cam pins 18 are located in the lower ends of the recessed grooves 12. 
Flanges 20 are formed on the cam pins 18, and have an approximate U-shape 
which extends along the lower face and left and right side faces of the 
cam pins 18. That is, they follow along the area outside the openings of 
the channels 19 of the cam pins 18. 
Recesses 13 close to the recessed grooves 12 are formed by cutting away the 
external face along the U-shaped part of the opening edges of the recessed 
grooves 12. The flanges 20 make contact with the external face of these 
recesses 13. Flanges 20 locate without substantial play in recesses 13, 
that is, flanges 20 are movable along recesses 13 without substantial play 
in any direction other than along the recesses. 
Supporting axles 21, which support a lever 22, are formed on the external 
side face of the hood member 11 at a location slightly lower than the 
lower edge of the recessed grooves 12. A pair of arms 24 protrude from 
both ends of an operating member 23 of this lever 22, the wider portion of 
the anterior ends of these arms 24 having axle receiving holes 25 into 
which the supporting axles 21 fit. These receiving holes 25 form the 
centre of spiral-shaped cam grooves 26, and both the receiving holes 25 
and the cam grooves 26 pass through the arms 24 from the inside to the 
outside. 
When the supporting axles 21 are fitted with the supporting holes 25 of the 
lever 22, a rotative operation can be performed between a fitting starting 
position (see FIGS. 3 and 4) and a fitting completion position (see FIG. 
5). In the fitting starting position, entering holes 26A of the cam 
grooves 26 fit with the upper end portion of the recessed grooves 12. The 
female connector housing 30 has a plurality of female terminal fittings 
(not shown) which fit with the tabs of the male terminal fittings, the 
lower end of the female connector housing 30 fitting with the hood member 
11 of the male connector housing 10. Cam pins 31 are formed on both side 
faces of the female connector housing 30, these cam pins 31 fitting 
tightly with the channels 19. Whereas the cam pins 18 of the moving plate 
15 are approximately cylindrical in shape, the cam pins 31 of the female 
connector housing 30 are approximately square. 
Next the operation of the present embodiment is explained. 
When the moving plate 15 and the lever 22 are to be attached to the male 
connector housing 10, the lever 22 is attached first and then brought down 
to the fitting starting position. In this state, the moving plate 15 is 
fitted into the hood member 11. At this juncture, the cam pins 18 fit with 
the upper end portions of the recessed grooves 12, the flanges 20 come 
into contact with the external faces of the recesses 13 and the tabs fit 
with the positioning holes 16, thus temporarily retaining the moving plate 
15 in the tab supporting position (see FIG. 3). In this state the cam pins 
18 fit with the entering holes 26A of the cam grooves 26. 
The female connector housing 30 is fitted from this state. The lower end of 
the female connector housing 30 is temporarily fitted into the hood member 
11, and the cam pins 31 of the female connector housing 30 fit with the 
channels 19 of the cam pins 18 of the moving plate 15, the cam pins 18 and 
31 forming a unified body. 
After the cam pins 18 and 31 form a unified body, the lever 22 is rotated 
in a clock-wise direction, as shown in FIGS. 3 to 5. The cam pins 18 and 
31, are engaged by the cam grooves 26 and are drawn in a unified manner 
into the hood member 11. The lever 22 reaches the fitting completion 
position, placing the connector housings 10 and 30 in a completely fitted 
state; the moving plate 15 reaches the inactive position. 
When the female connector housing 30 has not yet been fitted, the moving 
plate 15 remains in an exposed state within the hood member 11 and, as a 
result, an external force can be exerted on the moving plate 15 from 
above. If the moving plate 15 bulges and bends in a downwards direction 
due to this external force, a force is exerted on the wall 17 that makes 
it bend in an inward direction. However, the present embodiment is 
provided with flanges 20 on the cam pins 18 of the moving plate 15, these 
flanges 20 fitting with the recessed grooves 12 of the hood member 11 from 
their outer sides. This engagement regulates the change of position in the 
interior direction of the wall 17 and therefore also prevents the change 
of position in the interior direction of the cam pins 18. Consequently, 
there is no danger that the cam pins 18 will come out of the cam grooves 
26. Further, in the present embodiment the wall 17 is formed as a frame 
around the entire periphery of the moving plate 15 and therefore the wall 
17 itself regulates its change of position in the interior direction. As a 
result, the change of position of the cam pins 18 is regulated in an even 
more reliable manner. 
Next, a second embodiment of the present invention is explained with the 
aid of FIGS. 8 and 9. 
In this embodiment the configuration of the upstanding wall and the cam 
pins differs from that of embodiment one. Since the configuration of the 
other parts is the same as in the first embodiment, the same numbers as in 
embodiment one are accorded to parts having the same configuration, and an 
explanation of the configuration, operation and effects of these is 
omitted. 
In embodiment one the wall 17 is formed as a frame around the entire 
periphery of the moving plate 15. In embodiment two, long and narrow 
plate-shaped rising members 40 protrude from a central location on both 
side edges of the moving plate 15. Cam pins 41 protrude from the upper 
edges of the rising members 40. 
Further, embodiment one is provided with channels 19 which allow the cam 
pins 18 to fit with the cam pins 31 of the female connector housing 30, 
but embodiment two is not so provided. Consequently the cam pins 31 of the 
female connector housing 30 (not shown in FIGS. 8 or 9) and the cam pins 
41 of the moving plate 15 fit separately with two cam grooves (not shown) 
provided on the lever. These two cam grooves on the lever have the usual 
configuration and therefore a detailed explanation thereof is omitted. 
In embodiment two, flanges 42 are formed on the external periphery of the 
cam pins 41, these flanges 42 fitting with the receiving members 13 of the 
recessed grooves 12 in such a way that they can slide along the external 
faces thereof. Consequently, even if a position-changing force is exerted 
to cause the moving plate 15 to bend in a downwards direction and the 
rising members 40 to move in an inwards direction, the flanges 42 fit with 
the recesses 13 from their outer sides and the change of position in the 
interior direction of the rising member 40 and the cam pins 41 is reliably 
prevented. 
Furthermore, the present invention is not limited to the embodiments 
described above with the aid of figures. For example, the possibilities 
described below also lie within the technical range of the present 
invention. In addition, the present invention may be embodiment in various 
other ways without deviating from the scope thereof. 
In embodiment one, the wall 17 forms a surrounding frame and performs the 
function of regulating the inward movement of the cam pins 18. However, 
according to the present invention, the wall need not be continuous, but 
may equally well be configured to have a long and narrow plate shape on 
the upper ends of which cam pins are formed (similar to embodiment 2). 
In embodiment two, the rising members 40 of the moving plate 15 have a long 
and narrow plate shape. However, according to the present invention a 
continuous wall as in embodiment one, the rising member may also perform 
the function of regulating the inward movement of the rising member and 
the cam pins.