JPS61263012A - Push type switch with operation shaft - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an operating mechanism of a push-type switch used in consumer electronic equipment such as televisions and audio equipment, and used alone or in combination with a rotary variable resistor. It is related to.

BACKGROUND ART FIG. 9 shows a conventional push-type switch with an operating shaft. In the figure, reference numeral 1 denotes an operating shaft, the fitting portion 2 of which is fitted and supported by the inner diameter of a bearing 3, and the operating portion 4. There is a step 5 at the boundary between the bearing 3 and the front end θ of the bearing 3.
The stroke in the pushing direction is regulated by coming into contact with the fitting part 2, and a washer 7 for preventing removal is fitted at the tip of the fitting part 2, and this washer 7 for preventing removal comes into contact with the rear end 8 of the bearing 3. The stroke in the pulling direction is regulated.

A push-type switch 9 is disposed at the rear of the bearing 3, and 10 is a bowl-shaped movable contact made of an elastic metal material, which usually makes contact only with the fixed contact 11 on one side and contacts the fixed contact 12 on the other side. Although the space is in the state shown in FIG. 9 where the contact is open, a pressing force is applied to the operating shaft 1, and the rear tip 13 moves the bottom center 14 of the bowl-shaped movable contact 1o for a certain stroke against the elastic repulsive force. 10, the bowl-shaped movable contact 10 is inverted and the fixed contacts 11 and 12 are short-circuited. When the force applied to the operating shaft 1 is removed, the elastic restoring force of the bowl-shaped movable contact 1° pushes the operating shaft 1 back to the state shown in FIG. 9 again, with the fixed contact 11
．． It remains open for 12 hours.

Reference numeral 15 denotes an insulating plate made of a film-like insulating material, which is inserted in order to electrically insulate between the operating shaft 1 and the switch section 9.

Problems to be Solved by the Invention As mentioned above, the conventional push-type switch with an operating shaft is operated by pushing the bottom center 14 of the bowl-shaped movable contact 10 of the switch with the rear end 13 of the operating shaft 1. First, it was necessary to regulate the movable stroke of the operating shaft 1 so that it coincided with a predetermined stroke necessary for reversing the bowl-shaped movable contact 1o of the switch 9. However, in the case of the above configuration, the stroke of the operating shaft 1 is the stroke between the tip 6 of the bearing 3 and the step 5 of the operating shaft 1 at the position where the tip 13 contacts the bottom center 14 of the bowl-shaped movable contact 1o. This gap corresponds to the gap between the bearing 3 and the switch housing 1.
6. It is difficult to manufacture while maintaining a constant value because it fluctuates depending on the finished dimensions of the operating shaft 1, etc. and errors when combining these, and this dimension is smaller than the reversal stroke of the bowl-shaped movable contact 10. If it is too large, the switch will not operate, and if it is too large, the movable contact 1
The disadvantage was that it could cause deformation and damage.

In addition, the gap between the front end 6 of the bearing and the step 5 of the operating shaft 1 can be slightly changed by attaching the switch to the chassis of the set using the thread 17 provided on the outer periphery of the bearing 3. This may also cause the switch to malfunction.

Furthermore, in FIG. 9, which is a normal state in which the operating shaft 1 is not pressed, the tip 13 of the operating shaft 1 is connected to the movable contact 1 of the switch 9.
It is preferable that the liquid is exactly at the center 14 of the bottom surface of the movable contact 1o, but at this time, the dimensions from the shaft tip 13 to the locking washer 7 and from the center 14 of the bottom surface of the movable contact 1o to the rear end 8 of the bearing 3.
It is difficult to match the dimensions of the shaft side exactly, and if the dimension on the shaft side is too small, it will cause play and cause rattling noise when the set vibrates, and if it is too large, the bowl-shaped movable contact 10 will reverse. There was also the drawback that it was difficult to perform the operation perfectly.

In addition, since the operating stroke of the operating shaft 1 is determined by the reversal stroke of the bowl-shaped movable contact 10 of the switch section 9, it cannot be made too large; It was also easy to make erroneous operations such as activating the .

Furthermore, since the force that pushes the operating shaft 1 back from the state shown in FIG. 10 in which the switch is operated by pressing the operating shaft 1 to the original state shown in FIG. 9 is only the elastic repulsive force of the bowl-shaped movable contact 1o, the total force is large. If there is a large resistance to the thrust movement of the operating shaft 1, such as the example shown in Figure 11 in which this type of push type switch and rotary-operated variable resistor B are combined, the return of the shaft will be poor. There was also the problem.

The present invention has been made to eliminate the above-mentioned conventional drawbacks, and aims to provide a push-type switch with an operating shaft that is easy to produce and has stable quality.

Means for Solving the Problems The present invention provides a flexible arm-like body made of an elastic material whose tip is tilted when pushed by the operating shaft and drives a push-type switch on the back side of its middle part, which is pushed together with the operating shaft. The above-mentioned problem is solved by inserting the switch protruding perpendicularly to the axis between the switch and the switch.

Operation By having the above-mentioned structure, the present invention pushes the tip of the flexible arm-like body inserted between the operating shaft and the push-type switch, which is farthest from the held base, with the rear end of the operating shaft. By configuring the bowl-shaped movable contact of the push-type switch to be pushed on the back side of the intermediate portion at a closer distance from the tilting base, the stroke of the operating shaft can be set larger than the reversal stroke of the bowl-shaped movable contact. The structure is such that there is flexibility between the operating shaft point of action of the arm-shaped body and the push-type switch operating point, and the operating shaft is also pushed back by the elastic restoring force of the flexible arm-shaped body itself. It is something to do.

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

Fig. 1 shows an embodiment of the push-type switch with an operating shaft according to the present invention, and the same numbers are given to the same parts as the conventional examples shown in Fig. 9 and Fig. 1. Explanation will be omitted.

In FIG. 1, 2o is an arm-shaped body that is integrally formed with a resilient molded resin switch housing 16 and protrudes approximately perpendicularly to the operating shaft 1, as viewed from the Mu person direction in FIG. A front view is shown in FIG. As can be seen in the figure, its base is fixed to the wall of the front switch housing 16 by thin legs 21, and the leg 21 is flexible and can tilt forward and backward. The part has a contact part 22 with the rear end part 13 of the operating shaft 1, and the back side of the middle part has a contact part 23 with the bottom center 14 of the bowl-shaped movable contact 1o of the push switch 9. , these measuring contact parts 22
and 23 are connected by a leg portion 24, and this leg portion 24 is also flexible, but its bending force is set to be greater than that of the base leg portion 21.

Further, the switch housing 16 has the same configuration as the conventional example, except that it is divided into 16 front stage side and 16 rear stage side 16B due to the necessity of assembly.

Therefore, when pushing the operating shaft 1 to operate the one-bush type switch 9, the rear end 13 of the operating shaft 1 is connected to the arm-shaped body 20.
Push the end abutting part 22 of the arm-shaped body 2 as shown in Fig. 3.
When the chair arm-shaped body 20 is tilted by the base leg part 21 of the push switch 9, the contact part 23 on the back side of the intermediate part pushes the bottom center 14 of the bowl-shaped movable contact 1o of the push-type switch 9 to open and close it. become.

Since the present invention is constructed as described above, the stroke required for reversing the bowl-shaped movable contact 1° of the push switch 9 is determined by the inclination of the flexible arm-shaped body 20. The amount of movement of the intermediate contact portion 23 is a (see Fig. 4), and the stroke of the operating shaft 1 at this time is the amount of movement b of the tip abutment portion 22 of the arm-shaped body 20 (see Fig. 4), and these a , b is proportional to the ratio of the dimensions 11 and 12 of the base of the arm-like body 20. (b/a = ′!
2/g1) and since β1<12, it becomes a (b), and the movable stroke of the operating shaft 1 can be made larger than the reversal stroke of the bowl-shaped movable contact 1o of the switch 9. Therefore, the error in the stroke is also equal to this ratio. It may become larger by that amount.

In addition, in the case of the present invention, by setting the stroke b of the operating shaft 10 to be larger than the above proportional amount ax71z//J (the stroke required for reversing the bowl-shaped movable contact 1o of the push switch 9), the arm When the intermediate abutting portion 23 of the arm-shaped body 2o presses the bottom center 14 of the bowl-shaped movable contact 1Q and the movable contact 10 is reversed and stops against the fixed contact 12, the intermediate and root portions of the arm-shaped body 20 However, if further force is applied to the operating shaft 1 and the tip abutting portion 22 of the arm-shaped body 2o is pushed, the intermediate abutting portion 23 and the tip abutting portion 22 of the operating shaft 1 have enough margin to bend. The leg portion 24 between the contact portion 22 is bent (FIG. 5), and this extra stroke can be accommodated.

Further, since it is not necessary that the intermediate contact portion 23 of the arm-like body 2o and the bottom center 14 of the movable contact 10 of the switch 9 are always in contact with each other, by setting a slight gap between them, the intermediate contact portion 23 of the arm-shaped body 2o and the bottom center 14 of the movable contact 10 of the switch 9 are set to have a small gap. It is also possible to further increase the stroke of the operating shaft 1 as shown in FIG.

According to the present invention, the stroke of the operating shaft 1 can be set to be considerably larger than the reversal stroke of the movable contact 1o of the switch 9, which eliminates errors when assembling switch parts and the thread 17 on the outer periphery of the bearing 3. This makes it possible to absorb dimensional variations when installing this switch in a set, and to prevent malfunctions even if the operating shaft 1 is lightly touched.

Furthermore, the arm-shaped body 20 of the present invention is formed from a flexible material such as molded resin together with the switch housing 16, but before the switch is assembled, it is placed in a slightly inclined position as shown in FIG. By making it in advance and setting it so that when it is assembled into a switch as shown in Figure 1, it will be pushed slightly by the tip of the operating shaft 1 and be approximately perpendicular to the axis, it will always push back against the operating shaft 1. can have a biasing force.

By doing so, it is possible to eliminate the drawback of the conventional operating shaft that is loose, and it is also possible to increase the apparent operating force for the push-type switch. In addition, since the force pushing back the operating shaft naturally increases, we provide a push-type switch that can be operated stably even when there is great resistance to the thrust motion of the operating shaft by combining it with a rotary variable resistor as shown in Figure 8. It is possible.

Effects of the Invention As described above, the present invention absorbs dimensional errors of each part during assembly, allows highly reliable operation, and enables stable operation without wobbling, making it extremely practical and useful. It has a high value.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of an embodiment of the push-type switch with an operating shaft of the present invention in a normal state, Fig. 2 is a sectional view taken along the Moom arrow in Fig. 1, and Fig. 3 is an operating shaft of the embodiment. Fig. 4 is a first action and effect explanatory diagram of the arm-shaped body, Fig. 6 is a second action and effect explanatory diagram of the arm-shaped body, and Figs. FIG. 7 is a side sectional view of the second embodiment of the invention, FIG. 7 is a side sectional view of the third embodiment, and FIG. 8 is a side sectional view of the embodiment of the invention combined with a rotary variable resistor. , Fig. 9 is a side sectional view of a conventional push-type switch with an operating shaft, Fig. 10 is a side sectional view of the same operating state, and Fig. 11 is a side sectional view of a conventional push-type switch in combination with a rotary-operated variable resistor. be. 1... Operating shaft, 2... Fitting part, 3...
...Bearing, 4...Operation unit, 6...Stage, 6
...Front tip, 7... Removal stop washer,
8... Rear end, 9... Push type switch, 10... Movable contact, 11.12...
Fixed contact, 13... Rear tip, 14...
・Bottom center, 16... Insulation plate, 16...
Switch housing, 17... Screw thread, 2o...
... Arm-shaped body, 21 ... Legs, 22.23 ...
...Abutment part, 24...-leg part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2rjA Figure 4 Figure 5 Figure 6 Figure 7 Figure f ^ Ward 8

Claims (5)

[Claims] (1) An operating shaft that is fitted and supported by a bearing and has a locking part that allows it to move in the axial direction by a certain stroke, and an operating shaft that is made of an elastic material and protrudes approximately perpendicularly to the axis of the operating shaft, with the tip of the operating shaft near its tip. It is composed of an arm-like body with one end fixed, which abuts and has a contact part with a push-type switch on the back side of the middle part, and a push-type switch that is operated by being pushed by the middle abutting part of the arm-like body. Push-type switch with operating shaft. (2) The deflection force between the tip of the elastic arm-like body (the part that comes into contact with the operation shaft) and the middle part (the part that comes into contact with the push-type switch) is set to be larger than the deflection force at the base of the arm-like body. A push-type switch with an operating shaft according to claim 1, characterized in that: (3) A push-type switch with an operating shaft according to claim 1 or 2, wherein the elastic arm-like body has a biasing force in a direction to push back the operating shaft. (4) A push-type switch with an operating shaft according to any one of claims 1 to 3, wherein the arm-shaped body is formed integrally with the switch housing from an elastic insulating material. (5) The pushbutton with an operating shaft according to any one of claims 1 to 4, wherein the operating shaft is configured to be able to perform a rotational action as well as a thrust action, so that a variable resistor can also be operated by the rotational operation. formula switch.