JPH0635305Y2 - Switch operation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of Invention] (Industrial field of application) The present invention relates to a switch operating device in which a switch provided on a rear side portion of a base is operated by pressing a push button.

(Prior Art) A conventional configuration of a switch operating device of this type is shown in FIGS. 5 and 6. First, in FIG. 5, reference numeral 1 is a base, an operation panel arranged on a door of a refrigerator (not shown), 2 is a recess formed in the operation panel 1, and the recess 2 has an operation panel 1 at the center thereof. The cylindrical portion 3 protruding to the back side is formed,
Engagement holes 4, 4 are formed on both sides of the tubular portion 3. Further, in FIG. 6, reference numeral 5 denotes a printed wiring board provided with a control circuit on the back side of the operation panel 1 and screwed to the operation panel 1, and reference numeral 6 denotes a pressing type provided on the printed wiring board 5. Switch. On the other hand, 7 is a push button, on the back side of which a guide protrusion 9 is formed in the central portion, which forms a guide means 8 together with the tubular portion 3, and Engagement claws 10, 10 that engage with the engagement holes 4, 4 are formed on both sides of the guide protrusion 9, and the guide protrusion 9 is fitted into the tubular portion 3 and the engagement claw 10 is formed. ,Ten
Is attached to the operation panel 1 so as to be movable from the front side to the back side of the operation panel 1 by engaging with the engaging holes 4, 4, respectively. Reference numeral 11 denotes a restoring force urging means, which is an elastic body made of foamed polyurethane in this case.
And is attached to the outer peripheral portion of the guide protrusion 9. In this structure, when the push button 7 is pressed from the front side of the push button 7, the push button 7 moves in the back direction of the operation panel 1 with the elastic deformation of the elastic body 11, and the guide protrusion 9 The tip of the button pushes the operator 6a of the switch 6 to activate the switch 6, and after the pushing operation, the push button 7
When the pressing is released, the elastic body 11 returns from the previous compressed and deformed state, thereby returning the push button 7 to the original position.

(Problems to be solved by the invention) However, in the above-mentioned configuration, when the push button 7 is pressed at a portion deviated from the central portion thereof, the push button 7 is operated as shown by a chain double-dashed line in FIG. The guide projection 9 tilted with respect to the panel 1 and the tilted guide projection 9 causes the cylindrical section 3 to be twisted, and the guide projection 9 cannot press the operator 6a of the switch 6 and the switch 6 Sometimes could not work. Further, since the elastic body 11 as the restoring force urging means of the push button 7 is required as a separate part, there are disadvantages that the number of parts is large, the number of assembling steps is large and the cost is high.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a switch operating device capable of preventing the push button from tilting and reducing the number of parts.

[Structure of the Invention] (Means for Solving the Problems) In the present invention, a push button provided in a recess formed in the base so as to be movable from the front side to the back side of the base by a guide means, The guide means is provided with a restoring force urging means for returning the push button to the original position after the push operation, and a switch provided on the back side portion of the base is operated by the push operation of the push button. A guide projection formed at a plurality of positions on the periphery of the back surface of the push button and a hole formed so that the guide projection can be movably fitted to the bottom of the recess, The biasing means is an elastic piece part integrally formed at the bottom of the recess so as to have flexibility in an arm shape in a state of being substantially flush with the bottom and to have a pressing part at a portion corresponding to the switch. Configure and before Characterized in place where the structure is pressed the switch by pressing the pressing portion at the central portion of the back surface of the push button.

(Operation) In the case of the above-mentioned one, since the movement of the push button is guided by the guide means at a plurality of positions on the peripheral portion of the push button, the inclination with respect to the base is prevented. Further, since the restoring force urging means for returning the push button to the original position after the pressing operation is constituted by the elastic piece portion integrally formed with the base, the restoring force urging means is required as a separate part. do not do.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

First, in FIG. 1, reference numeral 21 denotes a base made of synthetic resin, which is disposed on the door of a refrigerator (not shown). Reference numeral 22 denotes a push button having the same rectangular shape and made of synthetic resin, which is attached to the operation panel 21. Of these, on the back surface of the push button 22, a plurality of peripheral portions, in this case, cylindrical guide protrusions 23 are formed at the four corners, engaging claws 24 are formed on both left and right sides, and a rib-like shape is formed at the center. To form a cross-shaped protrusion 25. On the other hand, the operation panel 21 is formed with a rectangular recess 26 corresponding to the push button 22, and the guide protrusion 23 is movably fitted to the bottom of the recess 26 so that the guide protrusion 23 and Form a circular hole 28 that constitutes the guide means 27, and also form an engagement hole 29 with which the engagement claw 24 is engaged. Reference numeral 30 is an elastic piece that constitutes the restoring force urging means of the push button 22, and this is a recess 26
Is integrally formed on the bottom of the base in a state of being substantially flush with the bottom, and is provided with a rectangular pressing portion 32 at the tip of the arm portions 31, 31 having flexibility in the form of an arm. A pressing protrusion 32a is integrally formed on the back surface of the pressing portion 32 as shown in FIGS. 2 and 3. Thus, the push button 22 allows the guide protrusions 23 of the push button 22 to be fitted into the hole portions 28 of the operation panel 21, and
The engagement panel 24 is attached to the operation panel 21 by engaging the engagement claws 24 with the engagement holes 29. On the other hand, in FIGS. 2 and 3, reference numeral 33 denotes a printed wiring board on which a control circuit is arranged, which is on the back side of the operation panel 21 and is attached and fixed to the operation panel 21 by screws (not shown). Reference numeral 34 denotes a pressing switch disposed on the printed wiring board 33, and an operator 34a of the pressing switch faces the pressing protrusion 32a of the pressing portion 32 of the elastic piece portion 30.

Thus, in the above structure, when the push button 22 is pressed from its front surface (upper surface in FIGS. 2 and 3), the push button 22 moves from the front side of the operation panel 21 to the back side while being guided by the guide means 27, Along with this, the protrusion 25 of the push button 22 presses the pressing portion 32 of the elastic piece portion 30 and the arm portion of the pressing piece portion 30.
31 is bent and the pressing portion is accompanied by the bending deformation of the arm portion 31.
The pressing protrusion 32a of 32 presses the operator 34a of the switch 34 to operate the switch 34. And, after this pressing operation,
When the pressing of the push button 22 is released, the push button 22 returns to its original position based on the return of the elastic piece portion 30 from the bending deformation.

According to the present embodiment as described above, since the movement of the push button 22 is guided by the guide means 27 at a plurality of positions on the peripheral portion of the push button 22, the push button has the conventional configuration in which the push button is guided only at one place in the central portion. Unlike the above, even if the push button 22 is pushed at a position deviated from the central portion, the push button 22 does not tilt and the switch 34 can always be operated reliably. Further, since the restoring force urging means of the push button 22 is constituted by the elastic piece portion 30 formed integrally with the operation panel 21, the elastic body as the restoring force urging means is constituted by a separate component. Unlike the above, the number of parts can be reduced correspondingly, the number of assembling steps can be reduced, and the cost can be reduced.

In addition, since the elastic piece portion 30 is formed on the bottom of the concave portion 26 in the operation panel 21 so as to be substantially flush with the bottom portion, the elastic piece portion 30 is provided between the push button 22 and the switch 34 while the elastic piece portion 30 is provided. There is an advantage that it is not necessary to secure a large dimension. Further, since the switch 34 is pressed by pressing the pressing portion 32 of the elastic piece 30 with the protrusion 25 provided at the center of the back surface of the push button 22, the operating force of the push button 22 is set to the switch 34.
There is also an advantage that it is easy to be transmitted to, and the reliability of operating the switch 34 is high.

The present invention is not limited to the above-described embodiment, and for example, as shown in FIG. 4 as another embodiment of the present invention, the engaging claws 35 on the left and right sides on the back surface of the push button 22 are respectively widened. On the other hand, the engagement hole 36 of the operation panel 21 is also formed correspondingly wide, and the wide engagement claw 35 and the engagement hole are formed.
The guide 36 may also be used as the guide 36.

[Effects of the Invention] As is clear from the above description, according to the present invention, the guide means of the push button is provided with the guide projections formed at a plurality of positions on the peripheral portion of the back surface of the push button and the guide projections at the bottom of the recess in the base. Since the push button is prevented from inclining and the switch can always be operated with certainty because it is configured with the hole formed so that it can be fitted, and the restoring force urging means of the push button is provided in the base. Since the elastic piece is integrally formed on the bottom of the recess so as to have flexibility in the form of an arm, the restoring force urging means is not required as a separate part, and the number of parts can be reduced accordingly. The excellent effect that the number of assembling steps can be reduced and the cost can be reduced as well. In addition, since the elastic piece is formed on the bottom of the recess so as to be substantially flush with the bottom, it is not necessary to secure a large dimension between the push button and the switch even though the elastic piece is provided. There are advantages. Further, since the switch is configured to be pressed by pressing the pressing portion of the elastic piece at the center of the back surface of the push button, the operating force of the push button is easily transmitted to the switch,
It also has the advantage of being reliable in operating the switch.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is an exploded perspective view, FIG. 2 is a vertical sectional view, and FIG. 3 is a vertical sectional view in a portion different from FIG. Also, FIG. 4 is a view corresponding to FIG. 1 showing another embodiment of the present invention. And the fifth
6 and 6 show a conventional structure, FIG. 5 is a view corresponding to FIG. 1, and FIG. 6 is a view corresponding to FIG. In the drawings, 21 is an operation panel (base), 22 is a push button, 23 is a guide projection, 25 is a projection, 26 is a recess, 27 is a guide means, 28 is a hole, 30 is an elastic piece (return force urging force). Means), 31 is an arm portion, 32 is a pressing portion, 34 is a switch, and 37 is a guide means.

Claims (1)

[Scope of utility model registration request] 1. A push button provided in a recess formed in a base by a guide means so as to be movable from the front side to the back side of the base, and a restoring force for returning the push button to its original position after the pushing operation. A guide provided at a plurality of positions on the peripheral portion of the back surface of the push button, wherein the switch provided on the back side portion of the base is operated by pressing the push button. The return force urging means is formed on the bottom of the recess and is substantially flush with the bottom, and the return force urging means is formed on the bottom of the recess so that the guide projection can be movably fitted to the hole. In one state, it is made of an elastic piece part which is flexible in an arm shape and integrally formed so as to have a pressing part at a portion corresponding to the switch, and the pressing part is formed at the center of the back surface of the push button. Press Switch operating device is characterized in that a configuration in which pressing the switch by.