Rotatively-operated electronic component with push switch

A rotatively-operated electronic component with a push switch includes a rotatable operation knob. A rotary contact plate is connected to the operation knob for motion together with the operation knob. Resilient contact arms provided on an attachment base plate touch the rotary contact plate. The resilient contact arms and the contact plate cooperate to generate an electric signal in response to rotation of the operation knob. A drive member connected to the attachment base plate rotatably supports the rotary contact plate. The drive member is swingable relative to the attachment base plate. The drive member is allowed to swing relative to the attachment base plate by application of a force to the operation knob. A push switch portion is supported on the attachment base plate. The push switch portion is actuated in response to swing of the drive member relative to the attachment base plate by the application of the force to the operation knob.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
This invention relates to a rotatively-operated electronic component with a 
push switch which is usable in various electronic devices such as a 
remote-controller operation unit or a portable electronic device. 
2. Description of the Prior Art 
It is known that a rotatively-operated electronic component and a push 
switch which have different knobs are separately provided in an electronic 
device. A typical example of the rotatively-operated electronic component 
is a rotary encoder having a knob which is rotatable about an axis 
perpendicular to a base plate of an encoder body. In the above-indicated 
known arrangement, the sum of the spaces occupied by the two knobs tends 
to be relatively large. This cause a barrier to the miniaturization of the 
arrangement. To operate the electronic component and the push switch, it 
is necessary to actuate the two knobs which is inconvenient. 
SUMMARY OF THE INVENTION 
It is an object of this invention to provide a small electronic component 
with a push switch. 
It is another object of this invention to provide an easily-operated 
electronic component with a push switch. 
It is still another object of this invention to provide a reliable 
electronic component with a push switch. 
A first aspect of this invention provides a rotatively-operated electronic 
component with a push switch which comprises a rotatable operation knob: a 
rotary contact plate connected to the operation knob for motion together 
with the operation knob; an attachment base plate; resilient contact arms 
provided on the attachment base plate and contacting the rotary contact 
plate, the resilient contact arms and the contact plate cooperating to 
generate at least one electric signal in response to rotation of the 
operation knob: a drive member connected to the attachment base plate and 
rotatably supporting the rotary contact plate, the drive member being 
swingable relative to the attachment base plate; means for allowing the 
drive member to swing relative to the attachment base plate by application 
of a force to the operation knob; a push switch portion supported on the 
attachment base plate; and means for actuating the push switch portion in 
response to the swing of the drive member relative to the attachment base 
plate by the application of the force to the operation knob. 
A second aspect of this invention is based on the first aspect thereof, and 
provides a rotatively-operated electronic component with a push switch 
which further comprises means for providing a resistance to rotation of 
the operation knob, the resistance-providing means including an uneven 
surface of the rotary contact plate, and a projection being provided to 
the drive member and being in contact with the uneven surface of the 
rotary contact plate, wherein the generated electric signal is in an off 
state when the projection is in one of recesses in the uneven surface of 
the rotary contact plate. 
A third aspect of this invention is based on the first aspect thereof, and 
provides a rotatively-operated electronic component with a push switch 
wherein points of contact among the resilient contact arms and the rotary 
contact plate substantially exist on a line connecting a center of the 
rotary contact plate and a center of the swing of the drive member, and 
one of the resilient contact arms provides a common contact located at an 
inner part of the rotary contact plate. 
A fourth aspect of this invention is based on the first aspect thereof, and 
provides a rotatively-operated electronic component with a push switch 
wherein points of contact among the resilient contact arms and the rotary 
contact plate substantially exist on a first line connecting a center of 
the rotary contact plate and a center of the push switch portion, and a 
center of the swing of the drive member substantially exists on a second 
line perpendicularly intersecting with the first line in a range 
containing the points of contact among the resilient contact arms and the 
rotary contact plate. 
A fifth aspect of this invention provides a composite device comprising a 
base member: an electronic component including a rotatable operation knob 
and being operated in response to rotation of the operation knob: means 
for supporting the electronic component on the base member: means for 
allowing the electronic component to swing relative to the base member in 
response to application of a force to the operation knob; a push switch 
including an operation button engageable with a part of the electronic 
component; means for supporting the push switch on the base member; and 
means for enabling the part of the electronic component to actuate the 
operation button of the push switch in response to swing of the electronic 
component relative to the base member by the application of the force to 
the operation knob. 
A sixth aspect of this invention provides a composite device comprising a 
base member; an electronic component including a rotatable operation knob 
and being operated in response to rotation of the operation knob; means 
for supporting the electronic component on the base member; means for 
allowing the electronic component to swing relative to the base member in 
response to application of a force to the operation knob; a push switch 
including an operation button; means for supporting the push switch on the 
base member; and means for actuating the operation button of the push 
switch in response to swing of the electronic component relative to the 
base member by the application of the force to the operation knob.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
First Embodiment 
Regarding a first embodiment of this invention, a rotary encoder with a 
push switch will be described as an example of a rotatively-operated 
electronic component with a push switch. The rotary encoder in the first 
embodiment is an incremental encoder of a two-phase output type. 
With reference to FIGS. 1 and 2, the rotary encoder with the push switch 
includes an attachment base plate 41 on which a drive member 51 is movably 
supported. The drive member 51 can swing relative to the attachment base 
plate 41 in a given angular range about an axis (a cylindrical shaft 54) 
perpendicular to the attachment base plate 41. The drive member 51 has an 
upwardly-projecting cylindrical shaft 52 around which a rotary member 61 
is rotatably provided. The rotary member 61 is supported by the 
cylindrical shaft 52 of the drive member 51. The rotary member 61 has 
approximately a disk shape or a cylindrical shape. A push switch portion 
71 is provided on a rear part of the attachment base plate 41. The push 
switch portion 71 has a body (a casing) fixed to the attachment base plate 
41. 
With reference to FIG. 3, the attachment base plate 41 includes a molded 
resin member of approximately a flat plate shape which is formed with an 
oval or arcuate opening 41A, a circular hole 42, and a recess 44. In 
addition, the attachment base plate 41 is provided with three resilient 
contact arms (three elastic contact arms) 45A, 45B, and 45C, and 
connection terminals 46A, 46B, and 46C. The resilient contact arms 45A, 
45B, and 45C constitute parts of a rotary encoder. 
The cylindrical shaft 52 of the drive member 51 extends through the oval 
opening 41A in the attachment base plate 41. The oval opening 41A is 
designed to allow a swing of the drive member 51 in a given angular range. 
The circular hole 42 is located at an edge of the attachment base plate 
41. As will be described later, the circular hole 42 is used for 
supporting the drive member 51 while allowing the swing thereof. A stop 
wall 43 fixedly extends on the attachment base plate 1 along a rear edge 
of the recess 44. The stop wall 43 and the recess 44 serve to hold or fix 
the body of the push switch portion 71. The resilient contact arms 45A, 
45B, and 45C remain in contact with a contact plate 62 fixed to a lower 
surface of the rotary member 61. The contact plate 62 constitutes a part 
of the rotary encoder. The resilient contact arms 45A, 45B, and 45C and 
the contact plate 62 serve to generate electric signals. The resilient 
contact arms 45A, 45B, and 45C electrically lead to the connection 
terminals 46A, 46B, and 46C respectively (see FIG. 5). The generated 
electric signals can be outputted to exterior via the connection terminals 
46A, 46B, and 46C. 
As shown in FIG. 2, an edge part of the drive member 51 has an 
upwardly-projecting cylindrical shaft 54 which extends through the 
circular hole 42 in the attachment base plate 41. The cylindrical shaft 54 
of the drive member 51 fits in the circular hole 43 in the attachment base 
plate 41 so that the drive member 51 is supported on the attachment base 
plate 41. Further, the drive member 51 can swing about the circular shaft 
54 in the given angular range. 
The lower surface of the rotary member 61 is provided with the contact 
plate 62 which touches the resilient contact arms 45A, 45B, and 45C on the 
attachment base plate 41. The contact plate 62 is circular, being coaxial 
with the rotary member 61. The contact plate 62 rotates together with the 
rotary member 61. A center of the rotary member 61 has a circular hole 63 
through which the cylindrical shaft 52 of the drive member 51 extends. The 
rotary member 61 fits around the cylindrical shaft 52 of the drive member 
51 so that the rotary member 61 is rotatably supported on the cylindrical 
shaft 52 of the drive member 51. A disk-shaped or cylinder-shaped 
operation knob 81 is fitted around and fixed to an upper half of the 
rotary member 61 by, for example, a pressing process. The operation knob 
81 rotates together with the rotary member 61. A leaf spring 65 and a 
washer 31 are fixed to an upper end of the cylindrical shaft 52 of the 
drive member 51 by pressing and deforming a part of the walls of the 
cylindrical shaft 52. The washer 31 prevents separation of the rotary 
member 61 from the cylindrical shaft 52 of the drive member 51. 
As shown in FIGS. 1 and 4, the rotary member 61 has an uneven upper surface 
formed with projections and recesses 64A extending radially and 
alternately. The projections have an inverted-V-shaped cross section while 
the recesses 64A have a V-shaped cross section. The leaf spring 65 has a 
downward projection 66 pressed against the uneven upper surface of the 
rotary member 61. During rotation of the operation knob 81, that is, 
during rotation of the rotary member 61, the downward projection 66 on the 
leaf spring 65 relatively rotates and slides on the upper surface of the 
rotary member 61 while following the unevenness in the upper surface of 
the rotary member 61. In this case, the contact between the downward 
projection 66 on the leaf spring 65 and the uneven upper surface of the 
rotary member 61 provides a suitable resistance to the rotation of the 
rotary member 61, that is, the rotation of the operation knob 81. 
Normally, the downward projection 66 on the leaf spring 65 is in the 
bottom of one of the recesses 64A in the upper surface of the rotary 
member 61. 
The resilient contact arms 45A, 45B, and 45C are pressed against the 
contact plate 62 by their elasticities. As shown in FIG. 5, the contact 
plate 62 has an inner ring contact 62A and linear contacts 62B. The linear 
contacts 62B extend radially outward from the inner ring contact 62A. 
Accordingly, the inner ring contact 62A and the linear contacts 62B are 
electrically connected to each other. The linear contacts 62B are spaced 
along a circumferential direction of the contact plate 62 by equal angular 
intervals. The linear contacts 62B are circumferentially separated from 
each other by insulating zones 62C. The angular dimension of each 
insulating zone 62C is preferably equal to several times the angular 
dimension of each linear contact 62B. During rotation of the operation 
knob 81, the resilient contact arm 45A remains in touch with the inner 
ring contact 62A. Accordingly, the resilient contact arm 45A serves as a 
common contact. During rotation of the operation knob 81, the resilient 
contact arm 45B sequentially and alternately meets the linear contacts 62B 
and the insulating zones 62C so that a first electric pulse signal can be 
generated between the resilient contact arm 45B and the resilient contact 
arm (the common contact) 45A. In addition, the resilient contact arm 45C 
sequentially and alternately meets the linear contacts 62B and the 
insulating zones 62C so that a second electric pulse signal can be 
generated between the resilient contact arm 45C and the resilient contact 
arm (the common contact) 45A. The point of contact between the resilient 
contact arm 45B and the contact plate 62 angularly disagrees with the 
point of contact between the resilient contact arm 45C and the contact 
plate 62 by a given small interval. Therefore, the phases of the first and 
second electric signals slightly differ from each other. 
The point of contact between the resilient contact arm 45A and the contact 
plate 62, the point of contact between the resilient contact arm 45B and 
the contact plate 62, and the point of contact between the resilient 
contact arm 45C and the contact plate 62 approximately align with each 
other along the line connecting the center of the contact plate 62 and the 
center of the circular hole 42 in the attachment base plate 41. It should 
be noted that the drive member 51 can swing about the center of the 
circular hole 42 in the attachment base plate 41. 
When the downward projection 66 on the leaf spring 85 is in the bottom of 
one of the recesses 64A in the upper surface of the rotary member 61, the 
resilient contact arms 45B and 45C are in touch with one of the insulating 
zones 62C of the contact plate 62 so that the previously-indicated first 
and second electric signals are in off states. 
The attachment base plate 41 has a pin-shaped upward projection 47 which 
supports a torsion coil spring 48. The torsion coil spring 48 urges a side 
surface of the drive member 51 in a direction parallel to the attachment 
base plate 41 and away from the push switch portion 71. The torsion coil 
spring 48 may urge a side surface of the rotary member 61 rather than the 
side surface of the drive member 51. 
As shown in FIG. 1, the push switch portion 71 fits into the recess 44 in 
the attachment base plate 41. A rear end of the push switch portion 71 
contacts the stop wall 43. Thereby, the body (the casing) of the push 
switch portion 71 is fixed to the attachment base plate 41. The push 
switch portion 71 has an operation button 72 which faces a projection 53 
on the drive member 51. The operation button 72 of the push switch portion 
71 remains in contact with the projection 53 on the drive member 51. 
Alternatively, the operation button 72 of the push switch portion 71 may 
be spaced from the projection 53 on the drive member 51 by a given 
interval when the drive member 51 is in its normal position. In this case, 
the projection 53 on the drive member 51 encounters the operation button 
72 of the push switch portion 71 as the drive member 51 swings from its 
normal position. 
As previously described, the drive member 51 can swing relative to the 
attachment base plate 41 about the circular shaft 54 in the given angular 
range. The resilient contact arm 45A on the attachment base plate 41 
remains in touch with the inner ring contact 62A of the plate 62 
independent of the swing of the drive member 51 in the given angular 
range. Further, the resilient contact arms 45B and 45C remain in a radial 
range corresponding to the radial dimensions of the linear contacts 62B 
and the insulating zones 62C independent of the swing of the drive member 
51 in the given angular range. 
Hereinafter, a description will be given of operation of the rotary encoder 
with the push switch. With reference to FIG. 5, the operation knob 81 can 
be rotated together with the rotary member 61 about the cylindrical shaft 
52 of the drive member 51 by an applied force along a tangential direction 
denoted by the arrows. During rotation of the operation knob 81, that is, 
during rotation of the rotary member 61, the resilient contact arms 45A, 
45B, and 45C on the attachment base plate 41 relatively rotate and slide 
on the contact plate 62 at the lower surface of the rotary member 61. In 
this case, the resilient contact arm 45A remains in touch with the inner 
ring contact 62A of the plate 62 while the resilient contact arms 45B and 
45C sequentially and alternately meet the linear contacts 62B and the 
insulating zones 62C of the plate 62. Therefore, first and second electric 
pulse signals can be generated among the resilient contact arms 45A, 45B, 
and 45C. The first and second generated electric signals travel from the 
resilient contact arms 45A, 45B, and 45C to the connection terminals 46A, 
46B, and 46C before being outputted to an exterior via the connection 
terminals 46A, 46B, and 46C. 
With reference to FIG. 6, in the case where the operation knob 81 is 
subjected to a force along a direction Hi parallel to the attachment base 
plate 41 and toward the push switch portion 71 (that is, a direction of 
the line connecting the center of the operation knob 81 and the center of 
the push switch portion 71), the operation knob 81 and the drive member 51 
can be swung about the cylindrical shaft 54 of the drive member 51 in a 
direction H2 against the force of the torsion coil spring 48 on the 
attachment base plate 41. As the drive member 51 swings about the 
cylindrical shaft 54 in the direction H2, the projection 53 on the drive 
member 51 actuates the operation button 72 of the push switch portion 71. 
An electric signal can be generated in response to the actuation of the 
operation button 72 of the push switch portion 71. The generated electric 
signal is transmitted from the push switch portion 71 to an exterior. When 
the force is removed from the operation knob 81, the drive member 51 and 
the operation knob 81 are returned to their normal positions (see FIG. 5) 
by the force of the torsion coil spring 48 on the attachment base plate 
47. In this case, the operation button 72 of the push switch portion 71 
returns to its normal position. 
It should be noted that the rotary encoder may be replaced by another 
rotatively-operated electronic component such as a rotary variable 
resistor. 
The rotary encoder with the push switch has advantages as follows. The 
rotary encoder is operated by accessing the operation knob 81. Also, the 
push switch portion 71 is operated by accessing the operation knob 81. 
Accordingly, the operation button 72 of the push switch portion 71 can be 
small. This enables a small size of the rotary encoder with the push 
switch. As previously described, the rotary encoder and the push switch 
portion 71 are operated by actuating only the operation knob 81. Thus, the 
rotary encoder with the push switch can be easily and quickly operated. 
The rotary encoder and the push switch portion 71 are provided in common 
on the attachment base plate 41. Therefore, the rotary encoder with the 
push switch can be handled as a single unit or a single electronic 
component. Furthermore, the positional relation between the rotary encoder 
and the push switch portion 71 can be accurately maintained. In addition, 
the rotary encoder with the push switch can be easily attached to an 
electronic device. 
Second Embodiment 
FIG. 7 shows a second embodiment of this invention which is similar to the 
embodiment of FIGS. 1-6 except for design changes indicated hereinafter. 
In the embodiment of FIG. 7, the point of contact between a resilient 
contact arm 45A and a contact plate 62, the point of contact between a 
resilient contact arm 45B and the contact plate 62, and the point of 
contact between a resilient contact arm 45C and the contact plate 62 
approximately exist on the line connecting the center of the contact plate 
62 and the center of a push switch portion 72. The center of a circular 
shaft 54, about which a drive member 51 (see FIGS. 1 and 2) can swing, 
exists on a line perpendicularly intersecting with the line connecting the 
center of the contact plate 62 and the center of the push switch portion 
72 in a region containing the points of contact among the resilient 
contact arms 45A, 45B, and 45C and the contact plate 62. 
As an operation knob 81 is pressed in a direction H1 and hence a rotary 
member 61 with the contact plate 62 is swung about the cylindrical shaft 
54, the points of contact among the resilient contact arms 45A, 45B, and 
45C and the contact plate 62 move mainly along a radial direction with 
respect to the contact plate 62. A radial dimension of an inner ring 
contact 62A (see FIGS. 5 and 6) of the plate 62 is chosen so that the 
resilient contact arm 45A will remain in touch with the inner ring contact 
62A of the plate 62 independent of the swing of the drive member 51. 
Further, radial dimensions of linear contacts 62B and insulating zones 62C 
(see FIGS. 5 and 6) of the plate 62 are chosen so that the resilient 
contact arms 45B and 45C will remain in a radial range corresponding 
thereto independent of the swing of the drive member 51.