JPS6327399Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a push button in a push button switch.

For example, in a small desk-top electronic calculator,
A push button switch with a large push button is used for the calculation mode key, etc. The large push button used in this push button switch is equipped with a push button holding member to prevent it from tilting and moving unevenly when pressed by hand, resulting in poor contact. It is held so that it moves parallelly.

Conventionally, push button holding members installed on large push buttons are made of metal rods that are separate from the push button.
For example, the two ends of a metal rod shaped like 〓 are inserted into both ends of a push button, and the middle part of the metal rod is supported by a case so as to be movable in a direction perpendicular to the direction of movement of the push button. The button is moved while being held so that the push button moves uniformly.

However, when a metal rod is used, if there is any play between the push button and the metal rod, the push button will tilt, making it difficult to move uniformly, and if the play is eliminated, the friction between the two will be large and the push button will not move properly. There is a functional drawback in that it does not move smoothly. Furthermore, since a separate metal rod is provided in addition to the push button, the number of parts increases and the metal rod must be manufactured, and the laborious work of assembling the metal rod and the push button is also required, resulting in poor productivity.

The present invention has been developed in view of the above circumstances, and provides a push button for a push button switch that solves the conventional problems in terms of function and production by integrally molding the push button and the push button holding member with synthetic resin. It is something.

An embodiment of the present invention will be described below with reference to drawings.

FIG. 1 shows an embodiment of the push button of the push button switch according to the present invention, in which 1 is the push button body, 2,
Reference numeral 2' denotes a push button holding member integrally molded with this push button body 1. The push button body 1 is molded from a synthetic resin such as polypropylene, nylon, or acetal, and has a rectangular parallelepiped shape, for example. A flange 1 is provided at the bottom of one side along the longitudinal direction of the push button body 1.
A and a flange 1b are formed at the lower part of the other side. Furthermore, projecting pieces are formed on the sides of the push button body 1 along the width direction, and these projecting pieces are connected to the flange 1b. The push button holding members 2, 2 extend in one direction (rightward direction in the figure) from the protruding pieces at the lower portions of both sides along the width direction of the push button body 1, respectively, along the side wall surface of the push button body 1. It is formed into a rod shape, and the push button body 1
It is molded from the same synthetic resin. That is, the push button holding members 2 and 2' have the same length and extend in the same direction from both sides of the push button body 1 in parallel and facing each other. The base end portions of the push button holding members 2, 2' are integrally connected to the flange 1b, that is, the push button 1, via thin wall portions 3, 3'. It is thin-walled. The thin portions 3, 3' connect the push button holding members 2, 2' to the push button body 1 so as to be rotatable in the vertical direction. The tip ends of the push button holding members 2, 2' are integrally connected to each other by integrally molding a round bar-shaped connecting rod (connecting member) 4 located parallel to the longitudinal direction of the push button body 1. The push button holding members 2 and 2' are attached to the push button body 1.
It is manufactured by molding it with synthetic resin.

FIG. 2 shows a push button switch provided with the aforementioned push button in, for example, a small electronic calculator. 5 in the figure is a case made of synthetic resin, and this case 1
A button hole 6 and a recess 7 for arranging the button are provided. A support portion 8 in the shape of a groove is formed on one side wall of the recess 7 and faces the tips of the push button holding members 2 and 2' of the push button disposed in the recess 7 and the connecting rod 4. 8 is formed to have a depth corresponding to the movement stroke of the push button holding members 2, 2' along a direction perpendicular to the direction of movement of the push button body 1. Note that the upper edge of the opening of the support portion 8 is cut out diagonally upward. In the figure, reference numeral 9 denotes a rubber sheet disposed on the lower side of the case 5, and this rubber sheet has a bulging portion 10, which is located in the recess 7 of the case 5 and has, for example, a truncated cone shape, directed upward. be. This bulge 1
A movable contact 11 is attached to the inside of the head of 0.
In the figure, reference numeral 12 denotes a circuit board disposed below the rubber sheet 9, and a fixed contact 13 is formed on this circuit board 12 to face the movable contact 11 of the bulge 10. The push button body 1 in the push button is case 5.
It is inserted into the button hole 6 so as to be movable in the vertical direction (contact opening/closing direction), and its lower part is positioned in the recess 7 and placed on the bulge 10 of the rubber sheet 9. Therefore, the push button body 1 is pushed upward by the elastic force of the bulge 10 and protrudes from the button hole 6, and the flange 1a,
1b hits the upper wall of the recess 7 and is restricted from moving upward. Further, the push button holding members 2, 2' have their distal ends and the connecting rod 4 movably inserted into the support portion 8 of the case 5. The push button holding members 2, 2' hold the push button main body 1 from both sides while being supported by the support portion 8.

Therefore, in the push button switch, when the push button body 1 is pressed by hand and moved downward (to the contact closing side) against the elastic force of the bulge 10, the bulge 10 is pressed by the push button body 1. As a result, the movable contact 11 descends and contacts the fixed contact 13 on the circuit board 12. Furthermore, when the manual pressure is released, the bulge 10 rises upward, so the push button body 1 is pushed up by the bulge 10 and moves upward (to the contact opening side), and at the same time, the movable contact 11
is separated from the fixed contact 13. When the push button body 1 moves downward, the base end portions of the push button holding members 2, 2' are displaced downward via the thin wall portions 3, 3', and the tip portions move inside the support portion 8, for example, toward the depth side. Moving. That is, the push button holding members 2 and 2' move in a direction perpendicular to the moving direction of the push button body 1 while holding the push button body 1 and rotating downward as the push button body 1 descends. Therefore, the push button main body 1 is held by the push button holding members 2, 2', and the entire push button body 1 is evenly translated in parallel. When pressing the push button body 1, even if you press the uneven part of the periphery without pressing the center part, both the push button holding members 2 and 2' move together, so the push button body 1 is kept in a uniform state without being tilted. Move with. Furthermore, when the push button main body 1 moves upward, the push button holding members 2, 2' rotate upward via the thin parts 3, 3' and along the direction perpendicular to the moving direction of the push button main body 1. Then, it moves within the support portion 8, for example, toward the opening side. Therefore, the push button main body 1 is held by the push button holding members 2 and 2', and the entire push button body 1 is moved in parallel uniformly.

Therefore, the push button holding members 2, 2' have thin parts 3,
3', the push button body 1 is integrally connected to the push button body 1 so that it can be rotated, and moves flexibly according to the movement of the push button body 1 while reliably holding the push button body 1. Therefore, the push button body 1 is reliably and uniformly moved. Move smoothly while maintaining a stable condition. That is, unlike when a push button holding member made of a metal rod is connected to the push button body, there is no problem in the movement of the push button body 1 due to rattling in the connecting portion. Further, since the push button body 1 is made of synthetic resin, no loud noise (sliding noise) is generated even when the push button body 1 is moved within the support portion 8 of the case 5 made of synthetic resin.

Note that the shape of the push button body is not limited to the above-described embodiment, and may be, for example, a cube. The push button holding members may be formed not at the lower part of the push button body but at an intermediate position in the height direction.Furthermore, the push button holding members may be formed not parallel to each other but at an angle so that the distance between the tips becomes small or large. As a push button switch, it can be used not only in small electronic calculators but also in a wide range of electronic devices.

As explained above, in the push button of the push button switch of the present invention, the push button holding member and the connecting member are integrally molded with the push button body, and the connecting member is movably supported by the support part of the case, so that the push button body can be securely held. It can be held and moved smoothly in a uniform state, resulting in better contact makeup and a longer movement stroke, which improves key touch. Furthermore, since the push button holding member and the connecting member are integrated with the push button body, the number of parts is reduced, assembly man-hours and material costs can be reduced, and there is no backlash between the members, making the operating sound of the push button extremely low.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a push button according to the present invention, and FIG. 2 is a sectional view showing an embodiment of a push button switch equipped with a push button according to the present invention. 1... Push button body, 2, 2'... Push button holding member,
3, 3'... Thin wall part, 4... Connecting rod, 5... Case, 6... Button hole, 7... Recessed part, 8... Support part, 9
...Rubber sheet, 10...Bulging portion, 11...Movable contact, 12...Circuit board, 13...Fixed contact.

Claims (1)

[Scope of utility model registration request] A push button body made of synthetic resin, which is provided in a case so that the contact can be moved in the opening and closing direction, and which applies a biasing force toward the contact opening side; a protruding piece formed on each opposing side of the push button body; and the protruding piece. A pair of push button holding members are formed extending in the same direction through thin wall portions from each of the push button holding members, and both ends of the pair of push button holding members are integrally connected, and the groove shape formed in the case is A push button of a push button switch, comprising a connecting member supported by a supporting part and movable in a direction perpendicular to the moving direction of the push button main body.