JPS5822798Y2 - string telephone - Google Patents

Description

[Detailed description of the invention] This invention relates to a handset-type string telephone that can be held in the hand for speaking and listening.

A string telephone of this type in which a frame with a vibrating membrane stretched thereon can be switched between the mouthpiece and the earpiece is disclosed in Utility Model Application No. 55-59807 (Utility Model Application No. 56-160597). ) The present applicant has previously filed an application for the invention.

The device devised by the previous application has the effect that the vibrating membrane extension frame can be used as a cover by moving it to the mouthpiece when speaking, and moving it to the earpiece side when listening to the other party's call. Since the extension frame is configured to be moved by operating a lever, there is a problem that it cannot be applied to a dial type telephone.

This invention is an improvement on the string telephone device devised by the earlier application, and the diaphragm extension frame can be switched to the position of the transmitter/receiver mouthpiece by rotating the dial.The basic configuration is An arcuate groove centered on the dial shaft attachment part is formed in the mouthpiece suitable tone plate part of the main body, and a rotary dial attached to the dial shaft attachment part has a catch that protrudes to the back side through the arcuate groove. In addition to providing a dowel pin, a horizontally elongated hole into which the engaging pin slides is provided in a part of the vibrating membrane extension frame, so that the reversible rotation of the dial allows the vibrating membrane extension frame to connect to the mouthpiece of the main body and the earpiece. It is characterized by being able to switch between the two.

Hereinafter, one embodiment of this invention will be described with reference to the drawings. In the figure, 1 is a handset-shaped main body having a mouthpiece 2 and an earpiece 3 that can be held and used with one hand, and a hole 4 of the mouthpiece 2. A circular arc groove 7 centered on the dial shaft attachment part 6 is provided in the suitable tone plate part 5 with the opening made.
is provided.

Note that this arcuate groove 7 is located between the center of the dial shaft mounting portion 6 and the earpiece 3.
Upper and lower groove ends 7a, 7 with respect to the vertical axis l passing through the center of
b is formed as a C-shaped groove of about 200 degrees displaced to the left as shown in FIG.

8 is 1 attached to the dial shaft attachment part 6 of the mouthpiece 2 of the main body.
It is a rotary dial having 0 finger holes 9, and the inner surface of the ring periphery 8a of this dial has a knurled uneven portion 10.
are provided all around.

Reference numeral 11 denotes an engagement pin that is integrally provided on the rotary dial 8 and protrudes toward the back side of the tone plate portion 5 via the arcuate groove 7 .

12 is the mouthpiece 2 and the earpiece 3 by rotating the dial 8.
A frame body that is moved up and down between a protrusion guide 14 that slides into vertical grooves 13 on both sides in the main body 1, and a lower end that has a horizontally elongated hole 15 into which the engagement pin 11 slides. It has a protrusion 16 (as clearly shown in Figure 4).

Reference numeral 17 denotes a vibrating membrane which is stretched around the frame 12 by adhesively bonding its peripheral edge, and one end of a thread 18 is fixed to the central position of the vibrating membrane.

Reference numeral 19 denotes an elastic body made of a spring or rubber cord that pulls the vibrating membrane tensioning frame 12 toward the earpiece 3 side, and includes an upper end hooking portion 20 of the main body 1 and a lower end hooking portion on the back side of the frame 12. 2
It is suspended between 1 and 1.

Reference numeral 22 denotes a spring sounding plate attached to the appropriate tone plate portion 5 of the mouthpiece 2 of the main body, and the tip of this spring is connected to the uneven portion 1 on the inner circumferential surface of the dial 8.
It is removably engaged with 0.

Reference numeral 23 denotes a button for pushing out the engagement pin, which is installed so as to be laterally movable at a position facing the circular arc groove end 7b of the tone plate portion 5. When the button 23 is pressed, the groove end 7b is pushed out.
4, the engaged pin 11 is laterally moved to a position beyond the vertical axis l, and the elastic body 1
The pulling blade 9 is reversed to the left side in FIG. 4 with respect to the vertical axis l, and the engagement pin 11 is moved upward along the arc groove 7,
The vibrating membrane tensioning frame 12 can be raised to the position shown by the solid line in FIG. 4.

3 and 4, the above-mentioned vibrating membrane extension frame 12 is connected to the earpiece 3.
The solid line shows the receiving state where the user is raised to a position facing the back of the user, and in this state, the user can listen to the outgoing call transmitted from the other party via the earpiece 3 by placing his or her ear against the earpiece 3.

When the dial 8 is rotated in the second clockwise direction, the retaining pin 11 moves along the arcuate groove 7 in the direction of the groove end 7b, and the pin 11 and the oblong hole 15 are connected to each other. Due to the sliding engagement, the vibrating membrane extension frame 12 is lowered against the tension of the elastic body 19 to a position facing the back of the mouthpiece 2, as shown by the imaginary lines in FIGS. 3 and 4.

Then, the dial engaging pin 11 moves beyond the vertical axis l to the right side in FIG.
When the dial is at its rotational limit where it collides with point b, the pulling blade of the elastic body 19 is reversed to the right in FIG. Thus, the lowered state of the vibrating membrane tensioning frame 12 is maintained.

This state is a transmitting state in which you speak, and when you speak through the mouthpiece 2 equipped with the dial 8, the sound vibrates the diaphragm 17, which is transmitted to the other party via the thread 18. The string is sent to the telephone.

At this time, since the other party has switched the vibrating membrane extension frame 12 to the earpiece 3 side, the other party can receive the transmitted words as they are.

Also, when you have finished your call and want to listen to what the other party is saying, press the button 23, and the pin 11 that was engaged with the groove end 7b will be pushed out to a position where it crosses the vertical axis l to the left in Figure 4. As a result, the pulling blade of the elastic body 19 is reversed and the vibrating membrane extension frame 12 is pulled up to the original receiving position, so that the user can listen to the call from the other party in this state.

Incidentally, in conjunction with the upward movement of this frame body 12, the dial 8 is
is reversed by the angular range of the arcuate groove 7, and the engagement pin 11 comes to engage with the groove end 7a.

In the embodiment described above, the vibrating membrane stretching frame 12 is automatically returned to the earpiece 3 side by the elastic body 19. 1
2 can be moved up and down, so the above-mentioned elastic body 19 and button 23 are not limited to the gist of this invention.

Since the string telephone device of this invention is as described above, the vibrating membrane extension frame built into the handset-shaped body is placed on the mouthpiece side when speaking, and on the earpiece side when listening to a call from the other party. It is effective to send and receive calls simply by switching and moving it toward the mouth side.In particular, since the switching and moving of the above-mentioned vibrating membrane extension frame is performed by rotating the dial, the lever-operated type devised in the earlier application cannot be applied. This has the effect of making it possible to provide a dial type telephone with a relatively simple structure and at a low cost.

[Brief explanation of drawings]

Fig. 1 is a front view showing the structure of a string telephone according to an embodiment of this invention with the dial removed, Fig. 2 is a front view of the dial, and Fig. 3 is a first view with the dial installed. The center vertical sectional view and FIG. 4 are its rear views. 1... Body, 2... Mouthpiece, 3... Earpiece, 4...
... Suitable tone plate part, 6... Dial shaft mounting part, 7... Arc groove, 8... Rotating dial, 9... Finger hole, 11...
- Engagement pin, 12... Vibrating membrane tensioning frame, 15... Horizontal elongated hole, 17... Vibrating membrane, 18... Thread.

Claims (1)

[Scope of utility model registration request] A handset-shaped main body that has a mouthpiece and an earpiece, and has an arcuate groove centered on the dial shaft attachment part on the appropriate tone plate part of the mouthpiece, and a dial shaft attachment part of the main body mouthpiece. The attached rotary dial has an engaging pin that protrudes to the back side through the circular arc groove provided in this dial part, and a horizontally elongated hole into which this engaging pin slides. A string telephone comprising a frame body that can be switched between positions on the back of the mouth and the earpiece, and a vibrating membrane that fixes one end of a string stretched over the frame body.