JPH0116260Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a push button switch equipped with a large push button.

For example, in a small desk-top electronic calculator,
A push button switch called a hang key, which has a large push button, is used for the calculation mode key, etc.
The large push button for opening and closing the contacts used in this push button switch tends to tilt unevenly and move when pressed by hand, causing contact failure. To prevent this, a push button holding member was installed. The push button is held so that it moves in parallel in a uniform state.

BACKGROUND ART Conventionally, a push button holding member used for a large push button is made of a metal rod A having a square shape as shown in FIG. The push button B is inserted into a button hole D formed in a device case (upper case) C made of synthetic resin so as to be movable in the contact opening/closing direction. The metal rod A, which is a push button holding member, is placed in the device case C so that its central part is placed on one side of the push button so that it can move in a direction perpendicular to the contact opening/closing direction to enable movement of the push button. It has a structure in which it is supported internally, its both ends are placed on both end sides of the push button, and it is inserted into holes formed at both ends of the push button.

However, in order to support the central part of the metal rod A in the equipment case C, it is necessary to conventionally attach the metal rod A to the equipment case C.
A support hole G is formed with a slit E into which the center part is inserted and a stand F on which the center part is placed.Due to its shape, it is best to form this support hole G only inside the device case C by molding. Since it is impossible, it is formed by penetrating the device case C inside and out. For this reason, a surface panel H is provided on the case surface to cover the open part of the support hole G formed in the equipment case A, and the center part of the metal rod A is inserted into the support hole G through the slit E. It is troublesome to attach it to the device case C. Another drawback is that it requires time and effort to insert both ends of the metal rod A into the hole of the push button B.

The present invention has been developed in view of the above circumstances, and has a simple configuration that allows a push button holding member made of a metal rod to be easily attached to an equipment case and a push button. The present invention provides a push button switch that does not require a surface panel and can improve economic efficiency.

That is, the push button switch of the present invention includes a device case in which a button hole is formed, a first bar support member inserted into the button hole, and a first bar support member on opposing sides, and a predetermined space above the bar support member. a push button from which a second bar support member is formed to protrude; a buffer material attached to the second bar support member; and a bulge that supports the push button inserted into the button hole in a vertically movable manner. a rubber sheet; a base and an extension that is bent at a substantially right angle from both ends of the base and inserted between a cushioning material attached to the first rod support member and the second rod support member; a holding rod having a section; a rod receiving member provided above the upper surface of the bulging portion of the rubber sheet on the inner surface side of the device case and receiving the base of the holding rod; It is equipped with a bar pressing member that presses down the base of the bar.

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

The drawings show an embodiment in which the push button switch of the present invention is applied to a small electronic calculator. Figure 2 is an exploded perspective view seen from inside the computer case, and Figures 3 and 4 are cross-sectional views. . In the figure, 1 is a case made of synthetic resin at the top of the computer, and a push button 3 made of synthetic resin in the form of a large rectangular parallelepiped is inserted into a button hole 2 formed in this case 1 so as to be movable in the vertical direction, that is, in the contact opening/closing direction. . 4 in the diagram is case 1
A circuit board is provided inside the circuit board 4. On the upper surface of the circuit board 4, a split fixed contact 5 and wiring (not shown) connected thereto are formed located below the center of the push button 3. In the figure, reference numeral 6 denotes a contact sheet made of insulating rubber provided on the circuit board 4, and this contact sheet (rubber sheet) 6 has a raised bulge 7 located below the push button 3. . The bulging portion 7 comes into contact with the lower surface of the push button 3 and pushes the push button 3 upward, that is, toward the contact opening side, with elastic force.
A movable contact 8 is provided opposite the fixed contact 5 on the inside of the head. In the figure, reference numeral 9 denotes a holding rod formed in the shape of a metal rod, the center part (base) 9a of which is arranged parallel to one side of the push button 3 along its length, and the center part 9a is arranged in parallel along the length direction of the push button 3. Both end portions (extending portions) 9b, which are bent at right angles, are arranged on both end sides of the push button 3. 10 and 10 in the diagram are case 1
The case 1 is attached to both ends of one side edge of the button hole 2 (the side where the center portion 9a of the holding rod 9 is arranged) on the inner surface of the button hole 2.
The rod receiving members 10, 10 are constructed as follows.
A pair of side plates 11, 11 are formed parallel to each other at a predetermined interval along one side edge of the button hole 2, and at each location between these side plates 11, 11 corresponding to both ends of the button hole 2, The rod receiving members 10, 10 are formed by arranging a pair of plate materials side by side with an interval in the length direction of the side plates 11, 11, and a half is provided at the lower edge of each plate material of the rod receiving members 10, 10. Circular receiving portions 10a, 10a are formed, respectively. Both ends of the central portion 9a of the holding rod 9 disposed on one side of the push button 3 are connected to the receiving portions 10a, 10 of the rod receiving members 10, 10.
It is fitted into and received by a from below. In the figure, reference numerals 13 and 13 denote piece-shaped bar holding members made of synthetic resin, and holding grooves 13a and 13a, which are open at the upper surface, are formed between both ends of the bar holding members 13, 13. The bar holding members 13, 13 are removably attached by being inserted from below into holes 12, 12 surrounded by the bar receiving members 10, 10 and side plates 11, 11 in each bar receiving member 10, 10, and are attached to the holding groove 1.
The receiving portion 1 of the receiving plate 12, 12 by 3a, 13a
Both ends of the central portion 9a of the holding rod 9, which is received by 0a and 10a, are held down from below. Therefore, the center portion 9a of the holding rod 9 is
The holding rod 9 is rotatably supported by the case 1 by the holding rod 9 and the rod holding members 13, 13, and both ends 9b, 9b of the holding rod 9 can be rotated in the vertical direction, that is, in the contact opening/closing direction, about the central portion 9a. In the figure, reference numerals 14 and 14 denote a first rod support member that is formed protrudingly at a lower portion near one side (right side in FIG. 4) at both ends of the push button 3. , 14 are located on the contact closing side (lower side) of the holding rod 9 and support the ends 9b, 9b of the holding rod 9, for example, at their bases. In the figure, reference numerals 15 and 15 indicate second rod support members that are formed protrudingly from the upper side of the push button 3 near the other side (the left side in FIG. 4). For example, the tips of both ends 9b, 9b of the holding rod 9 are positioned on the open contact side (upper side) and supported. In addition, the second rod support member 1
5, 15 are metal rods 9 in the contact opening/closing direction, that is, in the vertical direction with respect to the first rod support members 14, 14.
A predetermined interval exists to allow movement of both end portions 9b, 9b. Note that the second rod support member 1
5 and 15 are annular cushioning materials 1 made of rubber, for example.
6 and 16 are fitted. Therefore, both ends 9b, 9b of the holding rod 9 are connected to the first rod supporting members 14, 14.
and second rod support members 15, 15, and both rod support members 14, 14 and 1
5 and 15 are placed at different positions as described above, and because they are sandwiching both ends 9b and 9b of the holding rod 9, the movement of both ends 9b and 9b causes the push button 3 to move in the contact opening/closing direction, that is, in the vertical direction. becomes possible. In this way, the holding rod 9 is attached to the case 1 and holds the push button 1 movably in the contact opening/closing direction.

In the push button switch constructed in this manner, the push button 3 is normally biased upward by the elastic force of the bulging portion 7 of the contact sheet 6, and the movable contact 8 is spaced apart from the fixed contact 5. In this case, the holding rod 9 is pushed up by the first rod supporting members 14 and rotated upward. Further, second rod support members 15, 15 provided on the push button 3 abut against the inner surface of the case 1 via cushioning materials 16, 16, and prevent the push button 3 from moving upward. When the push button 3 is pressed down with a finger against the elastic force of the bulge 7, the push button 3 descends along the button hole 2 of the case 1 while compressing the bulge 7. Along with this, both ends 9b, 9 of the holding rod 9
b is pushed down by the second bar support members 15, 15, so the holding bar 9 is pushed down by the bar receiving members 10, 15.
10 and the center part 9a supported by the bar holding members 13, 13, and both end parts 9b, 9b are the push button 2.
rotates downward as the lowers. In this case, both ends of the push button 3 are attached to both ends 9b, 9b of the holding rod 9.
It descends stably while being held in place. When the bulge 7 is compressed by the push button 3, the movable contact 8 comes into contact with the fixed contact 5. Furthermore, when the pressing force on the push button 3 is released, the bulging portion 7 restores its elasticity and pushes up the push button 3, so that the push button 3 rises along the button hole 2. In this case, both ends 9b, 9b of the holding rod 9 rotate upward together with the push button 3 about the center portion 9a. Therefore, the push button 3 moves stably while being held by the holding rod 9. Therefore, the push button 1 is held by the holding rod 9 and moves stably in the contact opening/closing direction, and accidents such as poor contact of the contacts do not occur. Note that the second support member 15 provided on the push button 3,
Since cushioning materials 16 and 16 are attached to 15,
When the second holding members 15, 15 come into contact with the inner surface of the case 1, and when both ends 9b, 9b of the holding rod 9 come into contact with the second supporting members 15, 15, generation of impact and noise can be prevented. .

The case of assembling this push button switch will now be described. When attaching the holding rod 9 to the case 1, the case 1 is placed upside down, and the central portion 9a of the holding rod 9 is attached to the rod receiving member 10 formed in the case 1; 1
0a, and then insert the bar holding members 13, 13 into the hole 1.
2 and 12 and press the center portion 9a of the holding rod 9 with the holding grooves 13a and 13a. Therefore, with a simple structure including the rod receiving members 10, 10 and the rod pressing members 13, 13, the holding rod 9 can be reliably attached to the case 1 with a simple operation. When attaching the holding rod 9 to the push button 3, first rod supporting members 14, 14 and a second rod supporting member 15, each of which has both ends 9b, 9b of the holding rod 9 protruding from both ends of the push button 3, are provided. , 15.
For this reason, the first and second rod support members 14, 1
4 and 15, 15, the holding rod 9 can be easily attached to the push button 3 by a simple operation. Moreover, since the case 1 only has rod receiving members 10, 10 for receiving the holding rod 9, in order to attach the holding rod 9 to the case 1, it is necessary to penetrate the case 1 from its inner surface to the surface. Therefore, there is no need to provide a panel on the surface of the case 1 to cover the through hole.

Note that the rod receiving member and the rod pressing member are not limited to the configurations of the embodiments described above. The first and second rod support members are also not limited to the embodiments; for example, the first rod support member supports the tip of the end of the holding rod, and the second rod support member supports the tip of the end of the holding rod. The base of the base may be supported. Further, the structures of the movable contact portion and the fixed contact portion are not limited to the embodiments. This push button switch can be installed not only in small electronic calculators but also in a wide variety of other devices.

As explained above, the push button switch of this invention is
First and second rod supporting members are formed on a push button to be inserted into a button hole of an equipment case, and the push button is supported by a bulging portion of a rubber sheet, and an extending portion formed on a holding rod is connected to the first and second rod supporting members. a rod receiving member inserted between the first and second rod supporting members and provided above the upper surface of the bulging portion of the rubber sheet on the inner surface side of the device case; and a rod fixed to the rod receiving member in combination. Since the base of the holding rod is held by the holding member, there is no need to provide a panel on the surface of the case, and the arrangement of the bulging part of the rubber sheet and the wiring of the circuit board are free, making assembly easy. It has the advantage of being Furthermore, since the second rod support member is provided with a cushioning material, it is possible to eliminate impact noise between the second rod support member and the holding rod.

[Brief explanation of the drawing]

1A and 1B are a plan view and a front view respectively showing a conventional push button switch, FIG. 2 is an exploded perspective view showing an embodiment of the push button switch of the present invention, FIG. The figure is a cross-sectional side view of the same. 1... Case, 3... Push button, 4... Circuit board,
5... Fixed contact, 6... Contact sheet, 7... Swelling part, 8... Movable contact, 9... Holding rod, 10... Bar receiving member, 13... Bar pressing member, 14... First rod support member, 15... second rod support member, A...
Metal rod, B...Push button.

Claims (1)

[Scope of Claim for Utility Model Registration] An equipment case in which a button hole is formed; a first rod support member inserted into the button hole and on opposing sides; and a second rod support member spaced a predetermined distance above the rod support member. a push button formed with a second bar support member protruding therefrom; a cushioning material attached to the second bar support member; and a rubber having a bulge that supports the push button inserted into the button hole in a vertically movable manner. a sheet; a base; and an extending portion that is bent at a substantially right angle from both ends of the base and inserted between the buffer material attached to the first rod support member and the second rod support member; a holding rod having a structure, a rod receiving member provided above the upper surface of the bulging portion of the rubber sheet on the inner surface side of the device case and receiving a base of the holding rod, and a holding rod fixed in combination to the rod receiving member. A push button switch comprising: a bar holding member that presses the base of the button;