JPS5829867Y2 - switch device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a switch device that can be applied to, for example, a push button switch type volume adjustment means in a TV receiver to improve the operating feel of the push button, but the scope of its application is limited. Various electronic devices other than a TV receiver may be used.

Among the already known bushing switches, there is one in which the amount of displacement, ie, the stroke, during the pressing operation is set to about 0.3 mm, and the opening and closing of the signal current is stabilized.

Therefore, although this type of bushing switch is an excellent switch from the point of view of its construction, it has the disadvantage that its operating stroke is very small and the characteristic clicking sound described below reduces the feel of operation depending on the application.

In other words, pressing a button switch that generally feels good,
The relationship between the amount of displacement and the on (off) position must be roughly as shown in Figure 1. Therefore, it is difficult to say that a bush switch with a minute stroke has a good operating feel, and conventionally it has already been said that the button switch has a good operating feel. Measures are being taken to improve it.

Figure 1 shows a conventional countermeasure (switch device in this invention)
1 is an enlarged longitudinal cross-sectional view of the main parts for explaining the above-mentioned button switch, 2 is the body of the button switch, which has a rectangular outline,
3 indicates, for example, a disk-shaped actuator, and these members are all made of resin molded products, and inside the body 2, a leaf spring that doubles as a contact piece that bends like a click, and a plurality of contacts are arranged. Usually, the connecting circuit is turned on by pressing the actuator 3 by about 3 mm, and the actuator 3 is always biased in a protruding state by a leaf spring.

A required number of terminals 4 are led out from the body 2, and the entire bushing switch 1 is attached to, for example, the surface of a printed circuit board 5 by these terminals 4.

Reference numeral 6 in the figure indicates an operation panel of, for example, a TV receiver (or other equipment), and this panel 6 is provided with push buttons 7 spaced apart from each other in correspondence with the pushbutton switch 1.

That is, the reason for providing such a push button 7 is that the button switch 1
This is based on the intention of increasing the operating stroke of the button and providing a buffering effect to the button switch, thereby improving the feel of the push button 7 when the switch is operated.

The planar contour of the push button 7 in this example is, for example, an ellipse (see FIG. 4), and the center of the hollowed-out interior of the main body 8 has a cylindrical boss having a blind hole 9 with a depth equal to the lower end surface. 10, and slide pieces 11 with symmetrical retaining hooks are formed on both sides in the longitudinal direction.

Note that 8' is a thin metal decorative cap that covers the main body 8.

Then, the central cylindrical boss 10 and the left and right slide pieces 11 of the push button 7 are inserted into the guide holes 12 formed at corresponding positions on the panel 6 and the pair of guide holes 13 on both sides thereof, respectively.
The push button 7 is pressed to operate the bushing switch 1, and the stroke of the push button 7 is set as required.

By the way, as a buffer means in this case, a coil spring 14 having a predetermined length is inserted in advance into the blind hole 9 formed in the cylindrical boss 10 of the push button 7, and one end of the coil spring 14, that is, the lower end in the case of the figure, is connected to the button. The actuator 3 of the switch 1 is brought into contact with the actuator 3,
The actuator 3 is pressed at the limit of the pressing stroke of the pressing button 7 (this is also the compression limit of the coil spring).

However, although such a structure may seem reasonable at first glance, in reality it does not always have a good operating feel, and it is likely to cause various inconveniences on an assembly line or the like.

That is, as mentioned earlier, this type of bush switch 1 has a leaf spring inside that bends like a click, so it inevitably generates a click sound when it is turned on or off, and this click sound is caused by the coil spring 14. The resonance is amplified and the operation sound becomes surprisingly loud.

In addition, when assembling the entire switch device, there is a problem that the coil spring 14, which has been inserted in advance into the blind hole 9 of the push button 7, often falls off, which causes a stagnation of the assembly line.

The present invention has been made in view of the above points, and its purpose is primarily to provide a novel switch device that can replace the device shown in the example shown in FIG.

FIG. 3 is an enlarged vertical cross-sectional view of the main parts of an example of a switch device according to the present invention, which is used for explanation. Corresponding parts to those in FIG. The main point of the embodiment is that in this type of switch device, a part of a specially shaped cushion member 15 made of a material such as rubber is engagedly fitted into a blind hole 9 of a cylindrical boss 10 provided in a push button 7. , a configuration is adopted in which the exposed end of this cushion member 15 is brought into contact with the actuator 3 of the bushing switch 1,
This makes it possible to eliminate the above-mentioned drawbacks.

The illustrated cushion member 15 has two engaging portions 16 a and 16 b that are fitted into the blind hole 9 and have a truncated conical shape, for example, and have a length that is relatively smaller in diameter than the lower retaining portion 16 b. The shaft-shaped body 17 and its tip are integrally provided with, for example, a flange-shaped counter joint 18 (see FIG. 4).
The counter contact 18 is brought into contact with the surface of the actuator 3 of the bushing switch 1.

It goes without saying that the cushion member 15 is an integrally molded product.

Therefore, the cushioning effect of the cushion member 15 is such that when the push button 17 is pressed in the same manner as in the previous example, most of the stroke is absorbed by the annular body 17 expanding outward as shown by the arrow and contracting in the axial direction. Finally, the actuator 3 is pressed at the limit point.

In this case, the button switch 1 naturally generates a click sound, but this click sound is almost entirely muffled due to the material of the cushion member 15, so the operating feel of the push button 7 is extremely good, and overall The pressing and restoring operations of the press button 7 are significantly smoother than in the previous example.

FIG. 4 is an exploded perspective view showing the bushing switch 1, the push button 7, and the cushion member 15. The symbols of each member are assigned according to FIG. 3, and their shapes are also clear. Moreover, the order of assembly etc. can be easily understood.

However, the shapes of each member are merely examples.

By the way, the assembly of each element as illustrated is almost the same as that of the previous example described above, but if the cushion member 15 is inserted into the blind hole 9 of the push button 7, each engaging portion 16 a , 16 of the cushion member The conical periphery b and the inner periphery of the blind hole 9 are elastically in close contact with each other, and the shape of the retaining portion prevents the cushion member 15 from coming out at all.

Therefore, the device can be assembled efficiently according to a prescribed procedure.

From the above, the effects that the present invention can bring have already been clarified, but in conclusion, the present invention provides a unique cushioning member for this type of switch device, thereby improving the operating feel of the push button. This is the main advantage, and the fact that it helps improve workability during assembly is also an effect that cannot be overlooked.

Note that the present invention is not limited to the above-mentioned embodiments, and can take various forms within the scope of its gist.

[Brief explanation of the drawing]

Fig. 1 is a curve diagram showing the relationship between the push and displacement of the bushing switch and the on and off points, Fig. 2 is an enlarged longitudinal cross-sectional view of the main parts showing an example of a conventional switch device, and Fig. 3 FIG. 4 is an enlarged vertical cross-sectional view of essential parts showing one embodiment of a switch device according to the present invention, and FIG. 4 is an exploded perspective view showing each element thereof. In the figure, 1 is a bush switch, 3 is its actuator, 7 is a push button, 8 is its main body, 9 is a blind hole, 10 is a cylindrical boss, 15
1 is a cushion member, 16a and 16b are engaging portions, 17 is a shaft-like body, and 18 is a counter joint.

Claims (1)

[Scope of utility model registration request] In a switch device having a bushing switch body having an actuator and a push button slidably attached to a panel facing the actuator and for increasing the operating stroke of the bush switch body, the inside of the push button In addition to providing a cylindrical boss with a blind hole in the center,
A head having a conical shape and engaging with the blind hole, a shaft-like body having a smaller diameter than the head and a predetermined length, and a shaft-like body integrally provided at the tip of the shaft-like body and abutting on the actuator. A cushion member consisting of a flange-shaped counter contact is provided by molding a flexible material such as rubber, and the cushion member is provided between the actuator of the button switch body and the cylindrical boss of the push button. A switch device characterized in that the cushion member is interposed to provide a good operating feel when the push button is pressed.