JPS6314551Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a headphone with a switch that is provided with a switch that does not cause switching noise when turned on and off.

Recently, a headphone tape recorder that does not have a built-in speaker and listens to audio through a headphone has been developed and is now widely used. Such headphone tape recorders are often used by putting the main body in a bag. However, since most of the operation switches of this headphone tape recorder are provided only on the tape recorder itself, it is necessary to open the bag each time to operate it, which is very inconvenient. Also,
In order to eliminate this inconvenience, headphone models have been developed that are equipped with a switch that performs some of the operations on the main unit, but these headphone switches either cut off the audio signal to the speaker or stop or restart the main unit's tape running. It only had the function of driving. That is, as shown in FIG. 1, the switch of the conventional headphone with a switch
By turning off the switch 3 inserted between the input cord and the input cord 2, the audio signal to the speaker 1 is cut off, and the tape recorder main body 4 detects a change in the impedance of the input cord 2, and the tape starts running. It was configured to stop the operation.

However, with this configuration, switch 3
A loud switching noise occurred every time I turned it off or on, and it was very annoying.

In view of the above-mentioned drawbacks, the present invention provides a headphone with a switch, which is equipped with a switch that generates extremely small switching noise when turning on or off.

In order to achieve the above object, the present invention has a structure in which a switch is inserted between the input cord and the speaker to temporarily short-circuit the two terminals of the input cord and the two terminals of the speaker when switching on and off. be.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A headphone with a switch according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a front view of a headphone with a switch according to an embodiment of the present invention. In the figure, reference numeral 5 denotes a metal arc-shaped headband, and at both ends there are hanger caps 8 for holding speaker units 6, 7,
9 is slidably provided so that the positions of the speaker pads 10 and 11 of the speaker units 6 and 7 can be adjusted. 12, 13, 14 are input cords 15 connected to the speaker unit 6.
This is a transmission code for transmitting the input signal to the speaker unit 7. The tip of the input cord 15 is connected to the jack 16, and the speaker unit 6
A switch 17 is inserted between the input cord 15 and the jack 16.

As shown in FIGS. 3a to 3d, the switch 17 has a case 18, a cover 19, a button 21 attached to a lever 20, and a holder 22 for attaching the switch 17. The configuration is such that it can be operated by As shown in FIGS. 4a and 4b, the inside of this switch 17 has a switch unit 25 attached to the bottom surface of the case 18, which has a sliding body 24 pressed toward the left in FIG. 4 by a return spring 23. be. A guide 18a integrally formed with the case 18 is provided at the tip of the sliding body 24.
As a result, the inclined surface 26a of the cam 26, which is slidable only in the vertical direction, is in contact with the inclined surface 26a. When the recess 21a of the button 21 is pressed, the cam 26 is activated via the lever 22.
slides downward, and as a result, the sliding body 24 moves to the right in FIG. 4 against the spring 23, and the switch in the switch unit 25 operates. Also, if you slide the button 21 to the right, the lever 2
The L-shaped protrusion 22a provided at the left end of the cover 19 catches on the protrusion 19a provided at the left end of the cover 19, thereby locking the button 21 from returning upward.

The switches in the switch unit 25 are constructed and operated as shown in the electrical wiring diagrams of FIGS. 5a-c. In the figure, 27a and 27b are one input cord connected to the jack 16;
28a and 28b are the other input cords connected to the jack 16. 29a, 29b are one output cord connected to the speaker 30, 31a, 3
1b is the other output cord connected to the speaker 32. Cords 27a and 29a are both connected to terminal 33a, and cord 29b is connected to terminal 33b.
The cords 27b are respectively connected to the terminals 33c. Further, both the cords 28a and 31a are connected to the terminal 34a, the cord 31b is connected to the terminal 34b, and the cord 28b is connected to the terminal 34c.

35 and 36 are movable contact pieces fixed to the sliding body 24 of the switch 17, which are normally in the state shown in FIG.
4c are connected to each other. As a result, the output cord 29b and the input cord 27b are connected, and the output cord 31b and the input cord 28b are connected and turned on, and the speakers 30 and 32 produce sound based on the audio signal transmitted from the jack 16.

Next, by pressing the button 21 of the switch 17, the movable contact pieces 35, 36 are moved in the direction of arrow A, resulting in the state shown in FIG. 5b. In this case, the movable contact piece 35 contacts all the terminals 33a, 33b, 33c, and the movable contact piece 36 contacts the terminals 34a, 34b, 34c.
touch everything. Then input codes 27a and 27
b, 28a and 28b are short-circuited, and output cords 29a and 29b, 31a and 31b are short-circuited, resulting in a shooting state. In the switching state, almost no audio signal from the jack 16 flows to the speakers 30, 32, so almost no switching noise generated when switching the switch 17 flows to the speakers 30, 32.

Furthermore, in this state, the button 21 of the switch 17
By pushing downward, the movable contact pieces 35, 36 move in the direction of arrow B, and enter the state shown in FIG. 5c. In this case, the movable contact piece 35 connects the terminals 33a and 33b, and the movable contact piece 36 connects the terminals 34a and 34b. Then, the input cord 27b and the output cord 29b are separated, and the input cord 28b and the output cord 31b are separated, so that the audio signal from the jack 16 does not flow to the speakers 30 and 32, and the speakers 30 and 32 are turned off. In this way, the switching state shown in FIG. 5b becomes the off state shown in FIG. 5c, so that no harsh switching noise is transmitted to the speakers 30 and 32.

Conversely, when moving from the OFF state shown in FIG. 5C to the ON state shown in FIG. 5A, the switching state shown in FIG. .
By superimposing a minute DC current on the audio signal from the jack 16, the tape running on the set side into which the jack 16 is inserted can be stopped by taking advantage of the fact that the minute DC current stops flowing in the state shown in Figure 5c. It is also possible to do so.

In addition, the headphone with a switch of the above embodiment has the following characteristics:
It can be used not only for tape recorders but also for radio receivers, small television receivers, etc.

As described above, the present invention allows the audio to be turned on and off without operating the tape recorder itself by inserting a switch that causes a switching state between the on state and the off state into the input cord of the speaker and jack. Tape running can be turned on and off, and no annoying switching noise is heard in the speakers when switching on or off.

[Brief explanation of the drawing]

Fig. 1 is an electrical circuit diagram of a conventional headphone with a switch, Fig. 2 is a front view of a headphone with a switch according to an embodiment of the present invention, Fig. 3a is a plan view of the switch attached to the headphone, and Fig. Figure 3b
is a front view of the switch, FIG. 3c is a side view, FIG. 3d is a bottom view, FIGS. FIG. 3c is an electrical circuit diagram for explaining the operation of the switch section of the headphone with switch according to the present invention. 5... Headband, 6, 7... Speaker unit, 15... Cord, 16... Jack, 21
...Button, 27a, 27b, 28a, 28b,
29a, 29b, 31a, 31b... code, 3
3a, 33b, 33c, 34a, 34b, 34c
...Terminal, 35, 36...Movable contact piece.

Claims (1)

[Claims for Utility Model Registration] (1) A first terminal to which one cord from a speaker attached to the headband is connected, and a first terminal to which the other cord from the speaker and one cord from the jack are connected. and a third terminal to which the other cord of the jack is connected, and in an on state, the first terminal and the third terminal are connected, and in an off state, the first terminal and the third terminal are connected. The second terminal is connected, and the first terminal, the second terminal, and the third terminal are all short-circuited when changing from the on state to the off state and when changing from the off state to the on state. A headphone with a switch that operates a movable contact piece. (2) The headphone with a switch according to claim 1, which has a lock mechanism for keeping the switch in the off state.