JPH0419874Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a switch device that is provided in a device body and operated by a detachable handset or the like.

[Prior art and its problems]

Hook switch devices are known that are installed in the hook portion of the transmitter/receiver body and are opened and closed by attaching and detaching the handset.Generally, this type of hook switch device is required to be opened and closed reliably with a small operating force. .

Conventional hook switch devices incorporate, for example, an L-shaped lever, the middle part of which is rotatably supported, biased in one direction by a return spring, and one end of the switch knob is attached to one end of the lever. were brought into contact with each other, and the displacement of the other end of the lever caused by the displacement of this switch knob was applied to a switch knob such as a micro switch.

However, such a conventional hook switch device has a complicated structure, which makes it difficult to assemble, resulting in an increase in size and cost, and also has problems in terms of reliability, such as being prone to failure.

[Means for solving problems]

The object of the present invention is to provide a hook switch device that solves the problems existing in the prior art described above, and is achieved by a hook switch device 1 shown below.

That is, the present invention is applied to a hook switch device 1 in which the switch knob 2 is displaced by attaching and detaching the handset R to and from the hook, and the switch contacts 4 and 5 open and close based on this displacement, and its features include: The switch knob 2 is integrally formed with a synthetic resin having a low coefficient of friction, and at least one end (inner end) 2d is formed into a convex curved surface, and this end 2d is brought into contact with a leaf spring 3 to control the displacement of the leaf spring 3. The signal is transmitted to the switch contacts 4 and 5.

[Effect]

Next, the operation of the present invention will be explained.

The hook switch device 1 according to the present invention has a switch knob 2 when the handset R is removed from the hook.
becomes free, the leaf spring 3 is in its natural state, and the switch contacts 4 and 5 are in the closed position (FIG. 2).

On the other hand, when the handset R is put on the hook, the switch knob 2 is pushed inward by the handset R, and at this time, the leaf spring 3 is displaced against its own elastic force, displacing the switch contact 4. switch contacts 4 and 5 to the open position (first
figure). Note that when the handset R is removed, the leaf spring 3 self-returns to its original position, so the switch contacts 4 and 5 are in the closed position as described above.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 are partially sectional side views of a hook switch device according to the present invention, with FIG. 1 showing a state in which the switch knob is pushed in, and FIG. 2 showing a state in which the switch knob is returned. 3 is a partially sectional side view of a transmitter/receiver equipped with the same switch device, FIG. 4 is a rear view of the same switch device, and FIG. 5 is a plan view of the same switch device.

The switch device 1 according to the present invention is attached to a transmitter/receiver as shown in FIG.
A hook 32 is provided on the upper surface of the upper case 31, and a receiver portion R _r of a handset R is hooked onto the hook 32.

A through hole 33 is formed in the case 31 on which the receiver R _r is placed, and the switch knob 2 is inserted into the through hole 33 . The switch knob 2 is integrally molded using a synthetic resin with a low friction coefficient, such as polyacetal resin (static friction coefficient: 0.32). The shape of the switch knob 2 is, for example, oval in side view (FIG. 1) and rectangular in plan view (FIG. 5), and at least one end (inner end) of the lower surface 2d is formed into a convex curved surface. Make point or line contact with the plate surface. A stopper portion 10 projecting like a brim is provided at a predetermined position on the outer surface of the switch knob 2 to regulate the outward (upward) stroke.

On the other hand, one end of the leaf spring 3 and the base plate 11
Screw 1 into the inner surface of the upper case 31, overlapping one end.
Fasten with screws 5a and 15b. The tip of the leaf spring 3 is a free end, and its plate surface is brought into contact with one end 2d of the switch knob 2 to urge the switch knob 2 outward in a natural state. Base plate 1
1 has rigidity, and the other end is bent to form a stopper part 12 located below the leaf spring 3. In addition,
This stopper portion 12 has a function of preventing the switch knob 2 from coming off inward when the switch knob 2 is pushed in by a finger or the like more than necessary.

Further, the side portion of the base plate 11 is bent at a substantially right angle to the leaf spring 3 to form a contact mounting portion 13 for installing the switch contact pieces 4a and 5a. The switch contact pieces 4a and 5a are entirely formed into an elastic strip shape, and have the switch contacts 4 and 5 at their tips.
are provided, and the rear end portions are provided with connection terminals 4b and 5b for connecting lead wires. The intermediate portions of the switch contacts 4a and 5a are fixed with an insulating resin body 14, and this resin body 14 is screwed to the contact mounting portion 13. Further, 15 indicates an insulating boss provided on the switch contact piece 4a. In addition, an operating plate portion 3a is provided at a portion where the switch contacts 4 and 5 are located by extending a portion of the leaf spring 3 and contacting the insulating boss 15. In the natural state, the switch contact pieces 4a and 5a are spaced apart from each other and are substantially parallel to each other, and are in the open position.

With this configuration, the hook switch device 1 can be attached by simply screwing the screws 15a and 15b at two locations (ordinarily only at one location), making the assembly work extremely easy. Further, since the base plate 11 is integrally provided with the stopper part 12 and the contact mounting part 13, there are advantages that the number of parts is reduced and the structure is simplified, and furthermore, it can be made smaller and more compact.

Next, the functions of the switch device 1 will be explained.

First, when the handset R is attached to the hook 32 of the main body 30 as shown in FIG. 3, the switch knob 2 is pushed inward into the upper case 31 by the handset part R _r , resulting in the state shown in FIG. 1. . At this time, leaf spring 3
bends against its own elastic force. Since this displacement results in a displacement of the operating plate portion 3a, the switch contact 4 separates from the portion 3a and returns to its natural state. The switch device 1 is therefore in the open position.

On the other hand, when the handset R is removed from the hook 32, the switch knob 2 becomes free, so the leaf spring 3
Due to the elastic return of the switch knob 2, the stopper portion 10 of the switch knob 2 is pushed outward until it comes into contact with the through hole 33, as shown in FIG. Therefore, the switch contact 4 is pushed in the direction of the contact 5 due to the displacement of the leaf spring 3, and the hook switch device 1 is placed in the closed position.

By the way, in this case, since the leaf spring 3 is supported in a cantilevered manner, the locus on the tip side draws an arc. Therefore, the lower surface 2d of the switch knob 2 will slide slightly on the plate surface of the leaf spring 3, but since the friction coefficient of the one end 2d, which is the contact surface of the switch knob 2, is low and it is formed into a convex curved surface, it will slide smoothly. Slide.

Although the embodiments have been described in detail above, the present invention is not limited to these embodiments.
For example, a switch contact is a concept that includes not only a direct electrical contact as in the embodiment, but also a switch knob in another independent switch (for example, a micro switch, etc.). Further, the transmitter/receiver is a concept that includes any communication device such as a transceiver, a telephone, etc., and the handset/receiver may be of a type that is individually equipped with a transmitter or a receiver. Other details such as configuration, shape, arrangement, quantity, material, etc. may be arbitrarily changed without departing from the gist of the present invention.

[Effect of idea]

As described above, the switch knob according to the present invention is integrally formed with a synthetic resin having a low coefficient of friction, and at least one end (inner end) is formed into a convex curved surface. Since the displacement of the spring is transmitted to the switch contact, the structure is simplified, making it easier to assemble, more compact, and lower costs. It also ensures smooth movement and contributes to improved reliability. can.

[Brief explanation of the drawing]

Fig. 1: Partial cross-sectional side view showing the switch knob of the hook switch device according to the present invention in a pushed-in state, Fig. 2: The same side view showing the switch knob of the same hook switch device in a restored state, Fig. 3: The same switch knob. Partial cross-sectional side view of a transceiver equipped with the device, FIG. 4: Rear view of the same switch device,
FIG. 5: A plan view of the same hook switch device. In the drawings, 1... a switch device, 2...
Switch knob, 2d...one end, 3...plate spring,
4, 5...Switch contact.

Claims (1)

[Scope of utility model registration request] In a hook switch device for communication equipment in which a switch knob is displaced by attaching and detaching a handset to and from a hook, and a switch contact opens and closes based on this displacement, the switch knob is integrally formed of a synthetic resin with a low coefficient of friction, and at least one end is convex. What is claimed is: 1. A hook switch device, characterized in that it is formed into a curved surface, the one end is brought into contact with a leaf spring, and the displacement of the leaf spring is transmitted to the switch contact point.