JPS632185B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acoustic coupling device for transmitting and receiving signals by acoustically coupling a digital and analog modulator/demodulator and a communication line via a telephone handset. The present invention relates to a socket mounting structure that allows a socket into which a transmitting/receiving mouthpiece is fitted to be easily attached to a housing.

Acoustic coupling devices for acoustically coupling digital and analog modems and communication lines via a telephone handset have traditionally been made of elastic materials such as rubber, in order to securely attach them to the coupler of the handset. A cup-shaped socket made of a flexible material is attached to the housing of the acoustic coupling device. Fig. 1 shows an example of a conventional mounting structure of this type of socket, in which 1 has a cup-shaped recess 2 into which the mouthpiece (or earpiece) of the handset is fitted. 3 is a casing of an acoustic coupling device, and an opening 4 is formed at a predetermined location in this casing 3. The lower end of the socket 1 is fitted into the opening 4, and a flange 5 integrally formed on the outer peripheral surface thereof is fixed to the housing 3 by a plurality of setscrews 6.

However, this structure for attaching the socket 1 using the set screw 6 has the disadvantage that it requires work such as positioning and screw tightening during assembly, which requires a large number of assembly steps.

In addition, as a means of attaching the socket without using a set screw, a fitting groove is provided on the circumferential surface of the flange provided on the outer peripheral surface of the socket, and the edge of the opening of the housing is fitted into this fitting groove. (Jikko 54)
No. 6330) is also known, but in this case, the flange must be press-fitted into the opening while being aligned, which is disadvantageous in that it takes time and effort.

The present invention has been made in view of the above-mentioned points, and includes integrally providing an annular holding piece with a partially cut out circumferential surface on the outer circumferential surface of the lower end of the socket, and attaching the outer diameter of the annular holding piece to the housing. An opening having a hole diameter smaller than that and having a cutout groove formed on a part of the periphery is provided, and a locking protrusion close to the notch groove is provided on the periphery of this opening on the back side of the casing, so that the annular retaining A receiver for an acoustic coupling device in which a socket can be attached to a housing with one touch without using any setscrews, etc. by inserting the piece into the opening from the notch groove by rotating the socket. This provides an opening mounting structure.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 2 is an exploded perspective view showing an embodiment of the socket mounting structure according to the present invention, and FIG. 3 is a partially cutaway side view showing the state in which the socket is attached to the housing and the handset is fitted and held. . Note that the acoustic coupling device is provided with a pair of sockets, into which the mouthpiece and earpiece of the handset are respectively fitted; The difference is that the earpiece has a built-in microphone,
Since their main structures are almost the same and do not differ, the following explanation will be given using the mouthpiece socket. In the figure, the socket 10 is integrally formed of a flexible material such as rubber or soft synthetic resin, so that the upper surface thereof is open and the mouthpiece 12 of the handset 11 is fitted airtightly. A cup-shaped mouthpiece receiver 10A having a size that can be adjusted is provided. A cylindrical portion 10B coaxial with the mouthpiece receiving portion 10A and having a smaller outer diameter than this is integrally provided on the bottom surface 14 of the mouthpiece receiving portion 10A, and a speaker of an acoustic coupling device is installed inside the cylindrical portion 10B. (not shown) is stored. The lower end a of the cylindrical portion 10B is formed to have a smaller diameter than the upper end base 6, and the lower end a and the upper end base b
An annular holding piece 13 having a larger outer diameter than the upper end base b is integrally formed at the boundary between the upper end base b and the upper end base b. Therefore, an annular groove 15 is formed between the bottom surface 14 of the mouthpiece receiving portion 10A and the top surface of the annular holding piece 13,
The width of this annular groove 15 is set to be approximately equal to the plate thickness t of the casing 16 constituting the acoustic coupling device. A notch 17 is formed on a part of the circumferential surface of the annular holding piece 13 and has an appropriate length in the circumferential direction and a depth that reaches the circumferential surface of the upper end base b of the cylindrical portion 10B.

The cylindrical portion 10B is located at a predetermined location of the housing 16.
An opening 18 having a hole diameter that is approximately equal to or slightly larger than the outer diameter of the upper end base b, and has a cutout groove 19 formed in a part of its periphery is provided. The notch width W ₁ of the notch groove 19 is set to be approximately equal to or slightly larger than the notch width W of the notch portion 17 . A locking protrusion 20 is integrally provided on the back surface of the housing 16 and at the periphery of the opening 18 in the vicinity of the notch groove 19 . This locking protrusion 20 is for preventing the positioning and rotation of the socket 10 by fitting into and engaging with the notch 17 when the socket 10 is attached to the housing 16, and its width R is It is formed to be slightly smaller than the groove width Q of the notch 17.

Next, the operation of attaching the socket 10 to the housing 16 with the above configuration will be explained using FIG. 4.

First, as shown in FIG. 4a, the lower end a of the cylindrical portion 10B of the socket 10 is inserted into the opening 18, and one notch end 13a constituting the notch 17 of the annular holding piece 13 is inserted into the notch groove 19. Press the socket 10 at a position corresponding to , tilt it as shown in the figure, and rotate it in the direction of arrow Z. At this time, the annular holding piece 13 is elastically deformed, and the cutout end 13a fits into the cutout groove 19 and projects toward the back side of the casing 16.

Next, when the socket 10 is further rotated in the direction of the arrow Z with the cutout end 13a protruding toward the back side of the casing 16, the annular holding piece 13 is moved into the cutout groove as shown in FIGS. 4b to 4d. 19 into the housing 1.
It comes into sliding contact with the back side of 6. Then, the cutout end 13
When the socket 10 is rotated until a complete rotation, the other notched end 13b of the annular retaining piece 13 also aligns with the notched groove 19.
fit inside. As a result, in the socket 10, the annular holding piece 13 is fitted into the opening 18 through the notch groove 19, and its upper surface closely engages with the back surface of the housing 16 to prevent it from coming off, and the locking protrusion 20 is fitted into the notch 17 to prevent rotation and is attached to the opening 18 of the housing 16, thereby completing the attachment of the socket 10. FIG. 3 shows this installation state. In this attached state, the periphery of the opening 18 fits into the annular groove 15.

Note that when removing the socket 10 from the housing 16, contrary to the above, pull the socket 10 upward and pull out the other notched end 13b of the annular holding piece 13 from the notched groove 19, and remove the socket 10 from the housing 16. All you have to do is rotate it once in the direction opposite to the arrow Z direction.

As explained above, according to the socket mounting structure of the acoustic coupling device according to the present invention, an annular holding piece having a notch in a part of the peripheral surface is integrally provided on the outer peripheral surface of the socket,
The casing is provided with an opening having a hole diameter smaller than the outer diameter of the annular holding piece and having a cutout groove formed on a part of the circumferential surface, and a periphery of the opening on the back side of the casing is adjacent to the notch. Since the configuration includes a locking protrusion, when one notched end of the annular holding piece is inserted into the notched groove and the socket is rotated, the annular holding piece fits into the opening from the notched groove. Because it is inserted into the housing, the socket can be easily attached to the opening of the housing with one touch without using set screws or the like. In addition, the socket can be positioned and prevented from rotating, and the socket has a simple structure and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an example of a conventional socket mounting structure, Fig. 2 is an exploded perspective view showing an embodiment of the socket mounting structure according to the present invention, and Fig. 3 shows a socket with a housing. FIGS. 4A to 4D are partially cutaway side views showing a state in which the mouthpiece of the handset is attached to the body and fitted, and FIGS. 4A to 4D are views for explaining attachment of the mouthpiece. 10...Socket, 10A...Mouthpiece socket, 10B
... Cylindrical part, 11 ... Handset, 12 ... Mouthpiece, 13 ... Annular holding piece, 13a, 13b ... Notch end, 16 ... Housing, 17 ... Notch, 18 ...
...opening, 19...notch groove, 20...locking protrusion.

Claims (1)

[Claims] 1. An annular holding piece having a notch in a part of the circumferential surface is integrally formed on the outer circumferential surface of the lower end of the socket made of a flexible material and into which the mouthpiece of the handset is fitted, and the socket is attached. An opening having a hole diameter smaller than that of the annular holding piece and having a cutout groove formed on a part of the periphery of the opening is formed in the casing that is to be held, and the opening is located close to the notch groove on the periphery of the back side of the casing of the opening. A locking protrusion is provided, and by inserting the cutout end of the annular holding piece into the notch groove and rotating the socket, the annular holding piece is inserted into the opening, and the socket is inserted into the housing opening. A socket mounting structure for an acoustic coupling device, characterized in that the socket is mounted on the acoustic coupling device.