Operation switch unit for vehicle

Details Operation switch unit for vehicle Operation switch unit for vehicle

2001-11-21

2003-02-18

Enad, Elvin (Department: 2832)

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

C200S0110TC, C200S018000

Reexamination Certificate

active

06521848

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an operation switch unit for a vehicle.
Generally, an operation switch unit for a vehicle (hereinafter, called a controller unit) is provided within a vehicle.
There is a controller unit shown in
FIGS. 14
to
16
as such a controller unit.
The controller unit
71
includes a main case body
72
which one side surface is opened. A design plate
73
is attached to the opening portion on the one side of the main case body
72
. Knob attachment holes
73
a
,
73
b
,
73
c
are formed at the design plate
73
. Guide tubes
74
,
75
,
76
for rotating knobs are provided at a wall portion
72
a
on the other side of the main case body
72
so as to protrude forwardly and backwardly from the wall portion
72
a.
The rotation shafts
77
a
,
78
a
,
79
a
of the rotation knobs
77
,
78
,
79
are rotatably supported within the guide tubes
74
to
76
, respectively. Pinions
77
b
,
79
b
are provided at the tip ends of the rotation shafts
77
a
,
79
a
, respectively. The rotation knobs
77
to
79
are disposed within the knob attachment holes
73
a
to
73
c
of the design plate
73
.
Guide tubes
80
,
81
having shaft centers located at different positions from the shaft centers of the tubular guide bodies
74
,
76
are provided at the wall
72
a
so as to protrude forwardly and backwardly from the wall portion
72
a
, respectively. Bearing shafts
82
a
,
83
a
provided at the lower portions of cable operation members
82
,
83
are inserted and passed within the guide tubes
80
,
81
so as to be rotatable so that the cable operation members
82
,
83
can swing.
Sector gear portions
82
b
,
83
b
rotatable around the bearing shafts
82
a
,
83
a
, respectively, are provided in recess shapes at portions opposing to the pinions
77
b
,
79
b
in the cable operation members
82
,
83
in such a manner that the pinions
77
b
,
79
b
are engaged with the sector gear portions
82
b
,
83
b
, respectively. The cable operation members
82
,
83
are provided with cable attachment portions
82
c
,
83
c
, respectively. Power transmission cables
84
,
85
are attached to the cable attachment portions
82
c
,
83
c
, respectively.
When the rotation knobs
77
to
79
are rotated forwardly and reversely, the cable operation members
82
,
83
are swung reciprocally in accordance with the forward and reverse rotation of the rotation knobs
77
,
79
, respectively, so that the power transmission cables
84
,
85
move forward and backward and processing is performed by devices other than the controller unit
71
according to the forward and backward movement thereof.
A cam
82
d
for setting defogging of the window glass of a vehicle and a cam
82
e
for canceling an inner air circulation mode are formed at portions above the cable attachment portion
82
c.
A switch box
72
b
is integrally provided at the upper portion of the main case body
72
. An operation button
72
c
for determining whether outside air is taken into the vehicle or not is provided at the forward portion of the switch box
72
b
. The operation button
72
c
is configured in such a manner that the backward movement state of the operation button is maintained when this button is pushed once and an circulation mode is changed in the inner air circulation mode. When the operation button is pushed again, this button moves forward and restored again and the circulation mode is changed in an external air circulation mode.
As shown in
FIGS. 16A and 16B
, in the switch box
72
b
, members
86
,
87
are formed protrusively so as to be able to move forward and backward (upward and downward in drawing) with respect to the switch box
72
b
on moving loci of the cams
82
d
,
82
e
of the cable operation member
82
, respectively.
When the cable operation member
82
reciprocally swings and the member
86
pushed by the cam
82
d
moves backward within the switch box
72
b
, the window glass of the vehicle is defogged. In the state where the operation button
72
c
maintains the backward movement sate (that is, the inner air circulation mode), when the cable operation member
82
reciprocally swings and the operated member
87
pushed by the cam
82
e
moves backward within the switch box
72
b
, the operation button
72
c
moves forward and restored again and the circulation mode is changed in the external air circulation mode.
However, in the cable operation member
82
, the cams
82
d
,
82
e
are formed above the cable attachment portion
82
c
. Thus, the size of the cable operation member
82
becomes larger and the movable space of the cable operation member
82
at the time of swinging the cable operation member
82
becomes larger by a protruding size of the cams
82
d
,
82
e
. As a result, there arises a problem that the controller unit
71
at which the cable operation member
82
is attached becomes larger.
SUMMARY OF THE INVENTION
Accordingly, the invention has been made in view of the aforesaid conventional circumference, and an object of the invention is to provide an operation switch unit for a vehicle which can make the movable space of a cam smaller as compared with a case where the cam is provided at a portion outside of the outer frame of a cable operation member and can make the size of the operation switch unit for a vehicle smaller by a size of the movable space of the cam being made smaller.
In order to attain the aforesaid object, according to the present invention, there is provided an operation switch unit for a vehicle includes
an operation knob rotatable around a first rotation shaft center;
a first cam which rotates around the first rotation shaft center, and rotates in accordance with a rotation amount of the operation knob to operate an operated member;
a pinion which rotates around the first rotation shaft center and rotates in accordance with a rotation amount of the operation knob;
a cable operation member which reciprocally swings around a second rotation shaft center which is disposed at a position different from the first rotation shaft center; and
a sector gear which is provided at the cable operation member and meshes with the pinion, wherein
when the cable operation member is rotated around the second rotation shaft center, a circle drawn by a portion of the cable operation member most away from the second shaft center is supposed to be a virtual circle, and the first cam is disposed within the virtual circle.
In the above arrangement of the present invention, the operation switch unit for a vehicle may further include
a second cam which rotates around the first rotation shaft center, and rotates in accordance with a rotation amount of the operation knob to operate an operated member, and wherein the second cam is disposed within the virtual circle.
In the above arrangement of the present invention, the operated member operated by the first cam is a first switch for setting a defogging operation for a window glass of the vehicle, and the first cam is operated to turn on and off the first switch.
In the above arrangement of the present invention, the operated member operated by the second cam is a second switch for switching between an inner air circulation mode for circulating inner air within the vehicle and an external air introduction mode for taking external air within the vehicle, and the second cam switches the second switch in an inner air circulation mode setting state into the external air introduction mode.
Thus, according to the invention, the first cam and the pinion are rotated around the first rotation shaft center when the operation knob is rotated. When the operation knob is rotated by a predetermined rotation amount, the cam operates the operated member. Further, when the pinion is rotated, the cable operation member swings reciprocally. Since the first cam is disposed within the virtual circle, the movable space of the first cam can be made smaller as compared with the case where the first cam is provided at the outside of the outer frame of the cable operation member, for example.
Further, since the se

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