JPH057707Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a dual changeover switch, particularly a dual changeover switch in which when one operator is pressed down, the other operator is always unlocked and returns to the reset state. This is related to improvements to the switch.

[Prior Art] A multiple changeover switch that switches a plurality of modes is well known, and each changeover circuit is usually provided with a pushbutton switch, and these pushbutton switches are arranged in parallel to select a desired switching mode. be done.
This type of multiple changeover switch is suitable for, for example, a mode changeover switch of a vehicle interior air conditioner, an air flow rate changeover switch, and the like.

In this type of multiple changeover switch, each pushbutton switch is interlocked with each other, and when any pushbutton switch is pressed, the pushbutton switch in the previously operated state is automatically released. A switch is preferred, which has the advantage that the user can switch the switch with a single press. In addition, such interlocking changeover switches require a mechanism to return the full push button switch to the released state, and conventionally, a separate return button is provided or one of the push button switches is pushed halfway. A configuration is used in which a button switch that has been in an operating state is released by pressing it down.

However, each conventional changeover switch requires a complicated mechanism in order to perform the above-mentioned automatic changeover or return operation.

As a conventional double changeover switch, it was developed in 1982.
99329 is well known, and according to this switch,
The first and second operating elements arranged in parallel are each provided with a cam having a symmetrical cam surface, the cam is engaged with a locking member, and an actuating member that interlocks with both operating elements is provided on the other hand to operate the operating element. A structure is provided in which the other control element is held and released via an actuating member when one control element is pressed down.

[Problems to be solved by the invention] Conventional problems However, in the conventional device described above,
A locking member must be provided for each operator, and in a small switch device, it is extremely difficult to incorporate the locking member of such conventional devices, especially a locking member with spring properties, into the housing. There is a problem in that the workability is significantly reduced, and an improvement has been desired.

Purpose of the invention The present invention was devised in view of the above-mentioned conventional problems, and its purpose is to provide a dual changeover switch with an automatic return/release mechanism that has a simple structure and excellent assembly workability.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides two manipulators that can be pressed down while each is given a return force by a non-energizing mechanism. and a single connector that is interlocked with each of the two operators and capable of reciprocating in a direction (CD) intersecting the pressing direction of the operator; One is provided with a cam follower, and the other is provided with a cam having cam surfaces (,,,,) of opposite polarity that engage with the cam follower, and the cam follower and the cam form a cam mechanism, and the cam The bottom of the surface forms the return position of the operator, the cam surface forms the operating position of the operator, the cam surface forms a guide cam from the return position to the operating position, and the cam surface forms a guide cam from the operating position to the return position. Each cam surface forms a guide cam,
, is partitioned by a driving wall so that the cam follower moves in a circular manner so that pressing down on one of the operators releases the other operator, and the cam follower is separated by a cam surface. The cam height is irreversibly set so that the cam moves only in the order of .

[Embodiments] Preferred embodiments of the present invention will be described below based on the drawings.

1 to 5 show a preferred first embodiment of the dual changeover switch according to the present invention, and inside the switch housing (not shown) are first and second operating elements 1.
0 and 12 are arranged in parallel so that they can be pressed in the direction of arrow A, and push buttons 14 and 16 are fixed to each of the operators 10 and 12, respectively, and are also connected to a changeover switch (not shown).

A biasing means consisting of springs 18, 20 is engaged with the lower ends of both the operating elements 10, 12, and each operating element 10, 12 is pushed in the direction of the arrow B, which is opposite to the pressing direction in the A direction. It provides a return force to 12.

A guide plate 22 is fixed to the housing, and a guide wall 2 of the guide plate 22
2a and 22b, the connector 24 is connected to both operators 1.
It is supported in a predetermined position with respect to 0 and 12 so as to be able to reciprocate. As shown in detail in FIG. 2, this connector 24 has a horizontally long inverted U shape, and both ends 24a and 24b form a part of a cam mechanism to be described later, and are connected to both operators 10 and 12. A cam follower is formed that contacts the provided cam surface. In the embodiment, the connector 24 is movable in the direction of the arrow CD in FIG.

A retainer plate spring 2 is attached to the guide walls 22a and 22b.
6 is fixed, and the connector 24 is supported reciprocally between the guide walls 22a, 22b in a state where it is pressed toward both the operators 10, 12.

A characteristic feature of the present invention is that a cam mechanism is formed at the engaging portion between the two operators 10 and 12 and the connector 24, and in the embodiment,
A cam surface is formed on the operating elements 10 and 12 side, and a cam follower is formed on the connector 24.

The cams in the present invention are symmetrical cams 2 of opposite polarity to both the operators 10 and 12, respectively.
8 and 30, FIG. 3 shows a plan view of the cam 28 provided on the second operator 12, and FIG. 4 shows the height position of the cam surface. .

Further, FIG. 5 shows a perspective view of the cam 28, so that the height relationship of each cam surface can be understood, and the cam shape of this embodiment will be explained in detail below.

The cam 28 has a shape dug into the surface of the operator 12, and has four cam surfaces with different depths.
The bottom of the cam surface forms the return position and the cam surface forms the operating position. The cam surface forms a guide cam from the return position to the operation position, and the cam surface forms a guide cam from the operation position to the return position. Furthermore, cam 2
The side walls 28a and 28b of 8 form the cam follower or drive wall for the end 24b of the connector 24 in this embodiment.

6 to 9 show the operation of this embodiment. FIG. 6 shows a state in which both the operators 10 and 12 are in the return position, and although not shown, each operator 1
The switching contacts connected to terminals 0 and 12 are both in the off state. In this return state, connector 2
Both cam followers 24a and 24b of No. 4 are connected to the cam 30,
It has settled on the cam surface of 28.

FIG. 7 shows a state in which the second operator 12 is pressed down in the direction of arrow A, and the driving wall 28a of the cam 28 is
, while once driving the connector 24 to the right, move the arrow A.
move in the direction. Even when the connector 24 moves to the right, that is, in the D direction, the other cam follower 24a only moves within the cam surface of the cam 30, and the first operator 10 does not move in the direction of the arrow AB. Never.

By pressing the operator 12 in the direction of arrow A, the cam follower 24b of the connector 24 falls from the guide cam surface, and as is clear from FIG. If the push-down operation is stopped in this state, the operator 12 will return slightly in the direction of arrow B due to the return force of the biasing spring 20, and at this time the cam follower 24b will move along the guide cam surface. It will be understood that the robot moves and settles into the operating position in the guide groove as shown in FIG.

FIG. 8 shows the return release action of the operator 12 held at the operating position in FIG. Therefore, the cam follower 24b is driven in the direction of arrow C, and falls from the cam surface. When the pressing operation is released in this state, the cam follower 24b passes through the guide cam surface and returns to the original return position, and the second Operator 1 of
The restoring action of step 2 is completed.

Therefore, according to the present invention, each control element is moved to the desired operating position and return position each time it is pressed, and the corresponding switch can be turned on and off at will. Therefore, such a single controller operation has no effect on the other controllers.

On the other hand, when the second operator 12 is in the operating state as shown in FIG. 7, if the other operator 10 is pressed down, the operating position of the second pusher 12 is automatically released in the present invention. It is returned to the return position.

This state is shown in FIG. 9, in which when the first operator 10 is pressed down in the direction of arrow A, the cam follower 24a of the connector 24 engages with the drive wall 30a of the cam 30. Connector 24 is driven in the direction of arrow C. Therefore, the cam follower 24
b is removed from the operating position of the cam 28 and falls onto the cam surface, and as a result, the operator 12 is moved in the direction of arrow B by the urging force of the urging spring 20, and the operator 12 is moved as shown in FIG. It becomes the return position and an automatic return action is performed.

After the return action of the second operator 12 is completed, the first operator 10 continues to be pressed down in the direction of arrow A, and the first operator 10 will settle into an operational state.

As described above, according to the first embodiment, by the combination of the cam provided on each operator and the cam follower provided on the connector, both operators are interlocked with each other, and one of the operators is By pressing down, the other one is automatically released, and by pressing one of the operators halfway, the operator in the operating position can be reliably returned to the desired position with a simple structure. It becomes possible to obtain an interlocking changeover switch.

In particular, according to this embodiment, since the connector itself forms the cam follower, there is an advantage that there is no need for a separate locking member or the like as in the prior art.

FIG. 10 shows another modification of the first embodiment, in which the reciprocating movement of the connector 24 is controlled by sliding with each cam 28, 30. However, as shown in the figure, by fixing a flange 32 approximately at the center of the connector 24 and inserting springs 38 and 40 between this flange 32 and stoppers 34 and 36 fixed to the housing, respectively, A return force is applied to the connector 24 using spring force. That is, according to the embodiment shown in FIG.
When the movement of the cams 28, 30 is controlled from the neutral position to one side by the
drive unit and each cam follower 24b, 24
When a is released, the accumulated biasing force causes the connector 24 to automatically return to its neutral position, making it possible to quickly perform the switch operation.

11 to 14 show a second embodiment of the present invention, and this embodiment is characterized in that a cam surface is provided on the connector side and a cam follower is provided on each operator side. do.

The switch housing 42 includes a guide wall 42a,
42b is provided, and the first and second operators 44, 46 are held slidably in the direction of arrow AB. Each operating element 44, 46 is given a return force in the direction of arrow B by a biasing spring 48, 50, respectively, and in the illustrated state, both operating elements 44, 46 are
Indicates that the is in the return position.

Each of the operators 44, 46 is provided with lateral grooves 44a, 46a, into which cam followers 56, 58 biased upward by springs 52, 54 are inserted, respectively. 44a and 46a are spring holders 60 and 62, respectively.
It is sealed by.

On the other hand, the connector 64 is indicated by the arrow on the housing 42.
Guide plates 68 and 70 are provided between the cover 66 that closes the housing 42 and the housing 42 so as to be able to reciprocate in the CD direction.
are provided, and the connector 64 can move along both guide plates 68 and 70.

The guide plates 68 and 70 are also used to correctly position the respective operators 44 and 46 and the springs 48 and 50 within the housing.

In this embodiment, the cam follower 56 of each of the operators 44 and 46 is connected to the connector 64, respectively.
Cams 72, 74 are provided at positions corresponding to 58, and the combination of these cams 72, 74 and the cam followers 56, 58 provided on the aforementioned operators 44, 46 The desired cam mechanism is formed.

FIG. 14 shows cams 72, 7 in the second embodiment.
4 configurations are shown and these cams are similar to the first one described above.
The cam shape is exactly the same as the cam shape in the embodiment. Therefore, in the second embodiment as well, each operator 4 can be activated by pressing either one of the operators 44, 46.
Cam follower 56,5 provided in 4,46
8 can take the desired operating position and return position in cooperation with the cams 72 and 74, and by pressing down the other operator in one operating state, the operating state of one side can be reliably returned. Alternatively, by pressing down any of the operators halfway, it is possible to release the previous operator.

As described above, according to the second embodiment, a desired cam mechanism is formed by the two cam surfaces provided on the connector and the cam follower on the pusher, and the engagement between each operator and the connector is The operation state can be maintained and returned to the operating state at the same time, and no other locking member or the like is required.

[Effects of the invention] As explained above, according to the invention, two operators arranged in series are controlled in conjunction with each other by a connector, a cam mechanism is provided for each operator and the connector, and when one operation is performed, An improved two-way switch that can release the other side or release the operating state of the other side by pressing down halfway on either side, allowing reliable interlocking control with a small and simple structure. switch can be provided.

[Brief explanation of the drawing]

Figure 1 shows the first part of the dual changeover switch according to the present invention.
FIG. 2 is a sectional view of the main parts in FIG. 1, FIG. 3 is an explanatory diagram of the cam surface in the first embodiment, and FIG. 4 is the height of the cam surface in FIG. 3. Explanatory drawing, Fig. 5 is a perspective view of the cam shown in Fig. 3, and Fig. 6 is a perspective view of the cam shown in Fig. 3.
9 to 9 are action explanatory diagrams in the first embodiment, and the 10th
The figure is an explanatory diagram showing a modified example of the first embodiment, FIG. 11 is a plan view of the main part showing a preferred second embodiment of the dual changeover switch according to the present invention, and FIG. 13 is a cross-sectional view taken from FIG. 11, and FIG. 14 is an explanatory diagram showing the shape of a cam provided on the connector in the second embodiment. 10,44...first operator, 12,46...
Second operator, 18, 20, 48, 50... Return spring, 24, 64... Connector, 24a, 2
4b, 56, 58... Camu follower, 28, 3
0,72,74...cam.

Claims (1)

[Claims for Utility Model Registration] Two operating elements 10, 12: 44, 46, which are provided so as to be operable to press down when a return force is applied by biasing steps 18, 20: 48, 50, respectively.
and the operation elements 10, 12: 44, 46 are interlocked with each other, and the operation elements 10, 12: 44, 46 are
a single connector 24:64 capable of reciprocating in a direction (CD) intersecting the pressing direction of the connector 24:64 or both of the operators 10,
12: Cam followers 24a, 24b: 56, 58 are provided on either one of 44, 46, and the cam followers 24a, 24b: 56, 58 are provided on the other.
cam surfaces of opposite polarity that engage with the
cam followers 24a, 24b: 56, 5 are provided.
8 and the cams 28, 30: 72, 74 form a cam mechanism, and the bottom of the cam surface is connected to the operator 1.
The cam surface forms the operating position of the operator 10, 12: 44, 46, the cam surface forms a guide cam from the return position to the operating position, and the cam surface forms a guide cam from the return position to the operating position. The surfaces form a guide cam from the operating position to the return position, and each cam surface,
, , is either one of the operators 10 or 1
In order to release the other operator 12 or 10:46 or 44 by pressing 2:44 or 46, the cam followers 24a, 24b: 56, 58
cam followers 24a, 24b: 5
A dual changeover switch characterized in that the height of the cam is set irreversibly so that 6, 58 move only in the order of the cam surface.