JPH037864Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a push button switch used in audio equipment and the like.

BACKGROUND ART A typical prior art is shown in FIG. An operating member 3 is partially exposed in a mounting hole 2 of a front plate 1 of the audio device. End portion 4 of this operating member 3
is in contact with the support plate 5 and can be angularly displaced around the fulcrum 6 against the spring force of an elastic member 7 made of a material such as urethane, as shown by an imaginary line 8.
By pressing the operating member 3 in the pressing direction 9, the operating member 3 is angularly displaced as shown by the imaginary line 8, and the drive piece 10 formed on the operating member 3 is
presses the operating piece 13 of the switch 12 attached to the printed wiring board 11, thereby changing the switching mode of the switch 12.

Problems to be Solved by the Invention In the prior art shown in FIG. 6, when the operating member 3 is pressed in the pressing direction 9, the lower end 14 of the operating member 3 and the lower inner surface 15 of the mounting hole 2 It makes contact and gets caught. Therefore, the spring force of the elastic member 7 prevents the operating member 3 from completely returning to its original state. This causes the drive piece 10 to switch to the switch 12.
If the actuating piece 13 remains pressed, a malfunction will occur. In addition, the lower part 14 of the operating member 3
In a state in which the operating members 3 are caught on the lower inner surface 15 of the mounting hole 2, when a plurality of operating members 3 are arranged side by side, unevenness occurs and the operating members 3 become irregular and unsightly.

An object of the present invention is to provide a push button switch whose operating member is smoothly displaced and whose return is reliable.

Means for Solving the Problems In the present invention, a support protrusion is formed at one end of the operating member to be pressed and operated, and the support protrusion protrudes from both sides and has an axis in a straight line. and is guided by a guide member having a guide surface extending in the pressing direction, the operating member is spring-biased in a direction opposite to the pressing direction, and the other end of the operating member is angularly displaceable and perpendicular to the pressing direction. This push button switch is characterized in that it is supported so as to be displaceable within a plane in a direction perpendicular to the axis of the support protrusion.

Effect According to the present invention, the pair of support protrusions formed at one end of the operating member are displaced along the guide surface of the guide member, thereby preventing the operating member from being displaced perpendicularly to the pressing direction. can do. Therefore, the operating member can be smoothly displaced and the operation can be reliably achieved. In this way, the operating member can be reliably returned to its original position by the spring force, and even when a plurality of operating members are lined up, the returning state will not be irregular, and the aesthetic appearance will be improved.

Embodiment FIG. 1 is a sectional view of an embodiment of the present invention.
An operating member 23 faces the mounting hole 22 of the front plate 21 of the audio device, and this operating member 23 is supported by a support plate 24. A switch 26 is installed on the printed wiring board 25.
is fixed, and the switching mode of the switch 26 can be changed by pressing the operating member 23. Front plate 21, support plate 24, and printed wiring board 25 are integrally fixed.

FIG. 2 is a simplified sectional view showing the operating member 23 with the front plate 21 removed, and FIG. 3 is an exploded perspective view of the push button switch. Operation member 23
has an operating portion 27 that protrudes forward (to the right in FIG. 1) from the mounting hole 22 of the front plate 21. An extending portion 29 extending along the pressing direction 28 is formed at a lower portion of the operating member 23 in FIGS. 1 to 3. As shown in FIGS. A pair of support protrusions 30 and 31 protruding from both sides are formed on this extension portion 29 . Support protrusion 3
0 and 31 have their axes on a common straight line perpendicular to the pressing direction 28. 1 to 3 of the operating member 23
The other end 32, which is the upper part in the figure, is in the operating direction 2.
Extends to 8. The tip 33 of the other end 32 is arcuate in a plane parallel to the pressing direction 28 and perpendicular to the axes of the support protrusions 30 and 31. Operation section 27
has a drive piece 34 extending along the pressing direction 28. This driving piece 34 is the actuating piece 5 of the switch 26.
Opposed to 5. The switch 26 changes its switching mode each time the operating piece 55 is pressed.

Guide members 37 and 38 having guide surfaces 35 and 36 extending along the pressing direction 28 are provided on the front plate 21 below the mounting hole 22. This guide surface 3
Support protrusions 30 and 31 can be mounted and moved on 5 and 36. In a state where the support protrusions 30 and 31 are on the guide surfaces 35 and 36, the lower part 27a of the operating portion 27 of the operating member 23 is located above the lower inner surface 22a of the attachment hole 22. Extension part 29
a, 29b are arranged between the guide members 37, 38. The tip 33 of the end 32 of the operating member 23 is
The support position 39 contacts or comes very close to the surface 46 of the support plate 24 perpendicular to the pressing direction 28 . An elastic member 40 made of a material such as urethane is interposed between the support plate 24 and the operating member 23.
The operating member 23 is biased by a spring in the opposite direction to the pressing direction 28, that is, toward the front plate 21 side. Elastic member 40
The drive piece 34 is inserted into the insertion hole 41 . This drive piece 34 also passes through an insertion hole 42 formed in the support plate 24.

When the operating member 23 is not pressed, the front surface 43 of the operating member 23 is pressed by the spring force of the elastic member 40.
44 is in contact with the back surface of the front plate 21, and at this time, the support protrusions 30, 31 are in contact with the guide members 37, 38.
It is mounted on the guide surfaces 35 and 36 of. Operation unit 2
The lower surface 27a of 7 is the lower inner surface 22a of the mounting hole 22.
It is above.

When the operating portion 27 of the operating member 23 is pressed in the pressing direction 28, the state shown in the fourth figure is achieved. At this time, the support protrusions 30 and 31 are displaced along the guide surfaces 35 and 36, and the tip 33 of the end portion 32 of the operating member 23 contacts the surface of the support plate 24 and is angularly displaced. During this angular displacement of the operating member 23, the tip 33
While remaining in contact with the surface, it is slightly displaced downward in FIG. 4 as indicated by reference numeral 45. Drive piece 3
4 presses the operating piece 55 of the switch 26, thereby changing the switching mode of the switch 26. In this state, the lower surface 27a of the operating section 27
are located above the lower inner surface 22a of the mounting hole 22 and do not come into contact with each other.

When you release your finger from the operating portion 27 of the operating member 23, the operating member 23 is moved to the first position by the spring force of the elastic member 40.
Returns to the state shown. At this time, the operating member 23
The tip 33 of the end 32 contacts or comes very close to the surface on the support plate 24 and is displaced upwardly in the opposite direction of the arrow 45 (see FIG. 4).

Referring to FIG. 5, when the operating member 23 is angularly displaced due to pressure, the tip 33 of the end portion 32 moves toward the support plate 2.
4 in the direction of arrow 45 and in the opposite direction, the amount of displacement of the operating member 2 is as small as possible.
In order to perform the operation 3 smoothly, the operation member 23
The position 30a of the support protrusion 30 in its natural state with respect to the surface 46 of the support plate 24 that the tip 33 of the end 32 of the switch 24 can abut, and the support when the drive piece 34 presses the actuation piece 55 of the switch 26 during pressing. Distance l1 between the protrusion 30 and the position 30b,
It is preferable to determine the positions of the support protrusions 30, 31 and the tip 33 so that l2 is equal. In other words, the surface 46 of the support plate 24 has the support projections 30,
31 displacement amount (=l1+l2). As a result, the amount of vertical displacement of the tip 33 can be reduced, the angular displacement of the operating member 23 can be smoothly performed, and the actuating piece 55 of the switch 26 can be smoothly driven by the driving piece 34. become.

Effects As described above, according to the present invention, the angular displacement of the operating member can be performed smoothly, and malfunctions can be prevented. Moreover, the return operation of the operating member becomes reliable. Therefore, the present invention solves the problem that, for example, when a plurality of operating members are arranged side by side, the operating members are uneven and unsightly.

Furthermore, according to the present invention, although the surface of the support protrusion needs to be smooth, the support protrusion itself is small and can be formed in the shape of a simple cylinder, etc.
Both design and processing become easier.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view of the embodiment shown in FIG. 1 with the front plate 21 omitted, and FIG. FIG. 4 is a cross-sectional view showing the operating member 23 in a pressed state, FIG. 5 is a simplified view showing the moving state of the support protrusion 30, and FIG. 6 is a cross-sectional view of the prior art. be. 21...Front plate, 23...Operation member, 24...
Support plate, 25...Printed wiring board, 26...Switch, 27...Operation section, 29a, 29b...Extension portion, 30, 31...Support protrusion, 32...End portion, 3
3... Tip, 34... Drive piece, 35, 36... Guide surface, 37, 38... Guide member, 40... Elastic member, 55... Operating piece.

Claims (1)

[Scope of utility model registration request] A support protrusion that protrudes to both sides and has an axis in a straight line is formed at one end of the operating member to be pressed, and the support protrusion is provided on the front plate,
The operating member is guided by a guide member having a guide surface extending in the pressing direction, the operating member is spring-biased in the opposite direction to the pressing direction, and the other end of the operating member is angularly displaceable and in a plane perpendicular to the pressing direction. A pushbutton switch is supported such that it can be displaced in a direction perpendicular to the axis of a support protrusion.