JPH04107949U - Speaker assembly device for DTMF signal generator - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention can be applied to the mouthpiece of a telephone to
The present invention relates to a speaker assembly device for a DTMF signal generator that transmits MF (DualTone Multiple Frequency) signals, and more specifically, to an assembly device for simply and rationally assembling a small circular speaker into a case.

[Prior Art] Conventionally, this type of speaker is
As shown in the figure, several locations on the outer periphery of the speaker 1 are directly bonded to the case 4 using an adhesive 12, and a plurality of mounting pieces 13, 13, etc. are arranged on the outer periphery of the speaker 1, and each mounting Piece 13
, 13... were fixed to the case 3 via screws 14 and nuts 15.

[Problems to be solved by the invention] However, according to the conventional assembly structure, the work of applying adhesive or tightening screws is very troublesome and time-consuming, resulting in a significant decrease in assembly efficiency. Ta. In particular, in the former case where the adhesive 12 is used for assembly, a long waiting time is required for the adhesive 12 to harden, and it is also necessary to install environmental maintenance equipment such as a ventilation fan at the work site. On the other hand, in the case of screw tightening, since the speaker 1 is partially crimped to the case 4, the crimping force may vary, and sound may leak from areas other than the crimped area, resulting in a drop in sound pressure. Alternatively, even if there is a deformed portion due to distortion in the case 4, it cannot be corrected, resulting in a change in sound quality, preventing accurate signal transmission, and causing the receiving device to malfunction.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the speaker assembly device of this invention has a mounting seat that is large enough to fit the outer peripheral edge of the circular speaker on the frame opening side into the inner surface. a case having an opening in a plate surface surrounded by the mounting seat; and a bowl-shaped case that covers the surface of the speaker opposite to the frame opening side, and is in close contact with at least the outer peripheral edge of the speaker. an insertion portion provided along the outer periphery of the pressing member, and an insertion portion provided along the outer periphery of the pressing member and an opposing portion of the periphery of the attachment member, and the other portion corresponding to the insertion portion. and an introduction part that is provided so that the insertion part can be inserted into the insertion part, and a wedge member having a tapered contact surface between the insertion part and the introduction part, and the pressing member rotates toward the back. It is equipped with a finger rest for operation.

[Operation] In the speaker mounting device of the present invention, after covering the surface of the speaker opposite to the frame opening side with a pressing member, the outer peripheral edge of the speaker on the frame opening side is fitted into the mounting seat, and the pressing member is rotated. By inserting the insertion portion into the introduction portion and attaching the wedge, the speaker can be efficiently assembled to the case member with a one-touch operation.

Furthermore, by using the finger hook, the pressing portion can be easily rotated, which is particularly useful for assembling small speakers.

[Example] Hereinafter, an example embodying the present invention will be described based on the drawings.

Figure 1 shows a DTMF according to an embodiment of this invention.
FIG. 2 is an exploded perspective view showing the speaker assembly device in the signal generator, and FIG. 2 is a sectional view showing the assembled state of the device of FIG.

The speaker mounting device of this embodiment has a circular mounting seat 2, which is large enough to fit the frame opening side outer peripheral edge of the circular speaker 1, formed on the inner surface, and is surrounded by the mounting seat 2. It is comprised of a case 4 in which openings 3, 3 are cut out and formed on a plate surface, and a pressing member 5 that presses and fixes the speaker 1 to the case 4.

The opening may also be a large number of fine holes. The case 4 is formed into a thin box shape from a synthetic resin material and includes a removable back cover (not shown). In addition, the case 4 has a pair of horizontal L on the outside of the opposing parts of the mounting seat 2.
Engagement claws 6, 6 in the shape of a letter are provided protruding toward the center, and are inserted into the introduction portions 6a, 6, respectively, between the case surface.
a is formed. Further, the inner surface of the introduction portion of each engaging claw 6 facing the case surface is tapered at a predetermined angle with respect to the mounting surface of the speaker 1 so as to gradually expand in the circumferential direction.

On the other hand, the pressing member 5 is formed into a bowl shape from a synthetic resin material, and has a speaker 1 inside it.
A close contact portion 7 is provided in contact with the outer peripheral edge of the engagement claw, and an insertion portion 8 that can be inserted into the introduction portion of each of the engaging claws is cut out around the periphery.
The upper surface of the engaging claw 6 is tapered at substantially the same angle as the engaging claw 6. Thereby, by rotating the pressing member 5 in the direction of the arrow in FIG. 1 with the insertion part 8 inserted into the introduction part 6a, the insertion part 8 enters the introduction part 6a, and the pressing member 5 is wedged. Case 1 by action
The speaker 1 is configured so that it can be held between the case 4 and the pressing member 5.

Furthermore, a pair of finger hook pieces 9, 9 for hooking fingers during the rotation operation are formed protruding from the upper surface of the pressing member 5. In addition, the insertion portion 8 is formed with a recess 10 for preventing removal, which is engaged with a protrusion (not shown) provided on the inner surface of the engagement claw 6.

Next, a method for assembling the speaker 1 in the speaker assembly apparatus of this embodiment configured as described above will be described.

First, the pressing member 5 is placed over the speaker 1 via the rubber pad 11, and then the speaker 1 is set on the mounting seat 2, and the insertion portion 8 of the pressing member 5 is inserted into the introduction portion 6a of the engaging claw 6 of the case 4.
, and by rotating the pressing member 5 by hooking your fingers on the finger hook pieces 9, 9, the pressing member 5 can be rotated.
is wedged to the case 4, and the speaker 1 is firmly assembled to the case member 4 by the wedge force. Therefore, the speaker 1 can be efficiently assembled to the case member 4 by a one-touch operation of simply rotating the pressing member 5 placed over the speaker 1.

In this assembled state, the pressing member 5 is firmly held against the case member 4 due to the wedge action between the insert portion 8 and the engaging claw 6, which are each formed in an inclined shape, and the speaker 1
The entire outer periphery of the pressing member 5 uniformly contacts the contact portion 7 of the pressing member 5 via the rubber pad 11, and is pressed against the case 1. Therefore, the entire outer circumference of the speaker 1 can be attached to the case 4 with uniform force, preventing a drop in sound pressure due to sound leakage, and even if the case 1 has a deformed part due to distortion during molding, it can be corrected. It is possible to suppress changes in sound quality.

In this embodiment, the wedge member is composed of an insertion part provided on the pressing member and an introduction part provided on the case, but the configuration is reversed, that is, the insertion part is provided on the pressing member and the insertion part is inserted. A section can also be provided in the case. In addition, the number and position of the wedge attachment members may be two or more as long as it does not interfere with the speaker assembly work, and the configuration of the mounting seat, opening, pressing member, etc. may be changed within the scope of the spirit of the present invention. You are free to implement it.

[Effects of the invention] As detailed above, the speaker assembly device according to the invention can efficiently assemble the speaker to the case with a one-touch operation of simply rotating the pressing member placed over the speaker. Moreover, the entire outer periphery of the speaker is brought into close contact with the case, which provides the effect of reliably preventing the performance of the speaker from deteriorating.

Further, since the pressing member is provided with a finger hook for hanging a finger when rotating the pressing member, the pressing member can be easily rotated and is particularly useful for assembling a small speaker.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a speaker assembly device in a DTMF signal generator according to an embodiment of the invention, Fig. 2 is a sectional view showing the assembled state of the device of Fig. 1, and Fig. 3 and FIG. 4 is a perspective view showing a conventional speaker assembly structure. DESCRIPTION OF SYMBOLS 1... Speaker, 2... Mounting seat, 3... Opening, 4... Case, 5... Pressing member, 6... Engaging claw, 6a... Introducing part, 7... Close contact part, 8...... Insertion part, 9... Finger hook piece, 10... Recessed part, 11
...Rubber pad, 12...Adhesive, 13...Mounting piece, 14...Screw, 15...Nut.

Claims (2)

[Scope of utility model registration request] 1. A case having an inner surface formed with a mounting seat large enough to fit the outer peripheral edge of the frame opening side of a circular speaker, and an opening provided in a plate surface surrounded by the mounting seat; a bowl-shaped pressing member that covers the surface of the speaker opposite to the frame opening side, and has at least a portion in close contact with the outer peripheral edge of the speaker; and a periphery of the pressing member and the mounting member; It is composed of an insertion part provided along the outer periphery of one of the opposing parts, and an introduction part provided so that the insertion part can be inserted into the other part corresponding to the insertion part, and the insertion part and the introduction part A speaker assembly device for a DTMF signal generator, comprising a wedge member having a tapered contact surface with the wedge member. 2. The speaker assembly device for a DTMF signal generator according to claim 1, wherein the pressing member has a finger hook for rotational operation on the back surface thereof.