JP2935936B2 - Ceramic receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic receiver used for a general telephone handset.

[0002]

2. Description of the Related Art Conventionally, there has been a ceramic receiver of this type as shown in FIGS. FIG. 8 is a sectional view showing the structure of a conventional ceramic receiver with a coil. In FIG. 8, reference numeral 21 denotes an insulator ring which is arranged substantially at the center of the ceramic receiver, and an insulator ring serving as a center of attachment of each component, and 22 and 23 which are arranged below the insulator ring 21 and are coupled to each other and vibrate by an input signal. The metal plate and the piezoelectric element 25 forming the vibration plate are caulked and fixed to the insulator ring 21 with rivets 27 and are a printed board having a wiring pattern 34 (FIG. 9) thereon.

Further, in FIG. 8, reference numeral 28 denotes a metal plate 22,
A case forming an outer case of the ceramic receiver by fixing the insulator ring 21 and the printed circuit board 25 by pressurizing by curling pressure, 29 is a winding bobbin fitted and fixed to the outside of the case 28, 30 is a winding bobbin 29 And a coil that generates a leakage magnetic flux according to an input signal.

[0004] Also, 31 is fixed to the insulator ring 21 by a rivet 27 and connected to a wiring pattern 34 of a printed circuit board 25, as will be described later, and the other end is connected to the piezoelectric element 2.
3 is a contact terminal for forming a contact with respect to 3;
Reference numeral 33 denotes a front sound hole which is provided in front of and is provided with a plurality of holes for emitting sound waves from the diaphragm, and a rear sound hole 33 for damping the resonance vibration of the unimorph diaphragm.

FIG. 9 is a perspective view of a conventional ceramic receiver as viewed from the winding bobbin 29 side. A wiring pattern 34 for sending an input signal to the coil 30 is provided on the printed board 25 in FIG. Then, as described with reference to FIG. 8, the wiring pattern 34 includes the rivet 27 and the contact terminal 31.
Is connected to the piezoelectric element 23 via a wire and to the coil 30 and a signal input terminal via a wire.

Next, the operation of the ceramic receiver configured as described above will be described. When an input signal is received from the signal input terminal to the wiring pattern 34 of the printed circuit board 25, one is connected to the piezoelectric element 23 via the rivet 27 and the contact terminal 31, and vibrates the unimorph diaphragm to generate a sound wave. The sound wave is radiated outside through the front sound hole 32. On the other hand, the input signal received by the wiring pattern 34 drives the coil 30 through the wiring to generate a leakage magnetic flux.

[0007]

In the above-mentioned conventional ceramic receiver, the coil is wound around a winding bobbin of a separate component separated from the ceramic receiver main body to form a coil assembly, which is then assembled into the ceramic receiver main body. Since the wiring for the coil is also performed using a printed circuit board, the number of parts is large, workability such as positioning of the winding bobbin and mounting method is poor, and the ceramic receiver is downsized. However, the production cost was high, and it was difficult to produce a product that matched the taste of the customer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. By integrating and integrating components to form an integral structure, the number of components is reduced, the size is reduced, the quality is improved, and the efficiency is improved. Another object of the present invention is to provide a ceramic receiver that is inexpensive, has good quality, and is stable by improving the productivity by adopting a structure that enables simple manufacturing.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention generates a unimorph diaphragm composed of a piezoelectric element bonded to a metal plate and a leakage magnetic flux fixed to a part of the main body in an integrated structure. And a signal input terminal includes an insulator ring integrally formed and integrally fixed together with a part of the unimorph diaphragm and the main body, and the signal input terminal includes an input signal line and a lead wire of the coil. It is characterized by being directly coupled to the unimorph diaphragm.

Further, in order to solve the above-mentioned problems, the present invention is characterized in that the signal input terminals have connection portions for connecting the input signal line, the lead wire of the coil, and the unimorph diaphragm at three separate positions. It is characterized by having been formed.

Further, according to the present invention, in order to solve the above-mentioned problem, a part of the main body and the insulator ring are integrally connected between the part of the main body and the insulator ring, and the connected state is maintained. And a reinforcing member that protects against external pressure is formed in a part of the main body in cooperation with the insulator ring.

Further, in order to solve the above problems, the present invention includes a structure in which the signal input terminal cooperates with an insulator ring to prevent the signal input terminal from being pulled out of a state integrally formed with the insulator ring. And a structure in which each connecting portion is formed at a position away from the insulator ring.

That is, in order to solve the above-mentioned problems, the present invention eliminates the winding bobbin for the coil, fixes the coil to a part of the main body structure, removes the printed circuit board, and removes the signal input terminal. Terminals that are configured to directly connect the coil lead wires and the unimorph diaphragm are integrally formed on the insulator ring, and the input signal line and the coil are located at positions separated from each other and separated from the insulator ring, respectively. Of the main body structure and the insulator ring are formed between the lead wire and the unimorph vibration plate, and a part of the main body structure and the insulator ring are integrally connected and held therebetween. The present invention is characterized in that the combined structure and the reinforcing structure for protecting the main body structure from external pressure are provided.

[0014]

Therefore, according to the present invention, the winding bobbin for the coil is eliminated, the coil is fixed to a part of the main body structure, the printed circuit board is removed, and the coil lead wire and the unimorph vibration are directly transmitted from the signal input terminal. By integrally forming the terminal configured to be connected to the plate with the insulator ring, it is possible to make the ceramic receiver extremely small in size and simple in structure.

Furthermore, according to the present invention, the signal input terminal is formed with three portions for connecting the input signal line, the lead wire of the coil, and the unimorph diaphragm at positions apart from each other and from the insulator ring. In addition, a detent and pull-out prevention structure is formed to prevent deformation of the terminal and melting of the resin that may be caused by heat generation during manufacturing and use. Therefore, productivity can be further improved.

Further, according to the present invention, a part of the main body structure and the insulator ring are provided with a fitting structure for integrally connecting and holding them therebetween and a reinforcing structure for protecting the main body structure from external pressure. By doing so, it is possible to provide a high-quality and stable ceramic receiver that is more resistant to external pressure and free from the possibility of disconnection and the like.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a sectional view showing the structure of a ceramic receiver according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing the structure of the ceramic receiver according to the embodiment of FIG. 1, and FIG. FIG. 4 is a perspective view showing a processing shape before assembling into the insulator ring, and FIG. 4 is a perspective view showing a processing method of the insulator ring of the ceramic receiver according to the embodiment of FIG.

FIG. 5 is a cross-sectional view showing the configuration of the insulator ring and the signal input terminal of the ceramic receiver according to the embodiment of FIG. 1, and FIG. 6 is the coupling structure of the insulator ring and the bottom cover of the ceramic receiver according to the embodiment of FIG. FIG. 7 is a cross-sectional view showing a state in which the insulator ring and the bottom cover of the ceramic receiver according to the embodiment of FIG. 1 are combined.

In FIG. 1, reference numeral 1 denotes a piezoelectric element which is joined to a metal plate 2 to form a unimorph diaphragm, and 3 denotes a terminal 5 according to the present invention (to be described in detail later), which is radially inserted from one end through one end thereof. An annular insulator ring formed of a material such as resin that has been input, 4 is a coil that is used for other purposes by inputting audio input signals and generates leakage magnetic flux, 5 is a signal input terminal, a coil connection terminal, and a vibration Terminals 5a and 5b including a board connection terminal are two positive and negative signal input terminals each configured to be connected to an input signal line for receiving an audio input signal.

Further, the description will be continued with reference to FIG.
C and 5d are coil connection terminals to which two coil connection lines 11 guided to the coil 4 are connected and connected to the coil 4, and 5e and 5f are coil connection lines 11 for the purpose to be described later.
Are formed between the coil connection terminals 5c and 5d to the coil 4, and the gaps 5j and 5k are the vibration plate connection terminals of the terminal 5 connected to the piezoelectric element 1 and the metal plate 2, respectively.

Further, referring to FIG. 1, the description of each component will be continued. 6 is attached to the inside of the back sound hole 8 of the bottom cover 7, and an acoustic resistance material for damping the resonance vibration of the unimorph diaphragms 1 and 2; 7, the coil 4 is integrally mounted according to the present invention,
A bottom cover 8 integrally connected to the insulator ring 3 by the connection structure according to the present invention;
9 is a unimorph diaphragm 1 and 2, an insulator ring 3 and a bottom cover 7
A case 10 is provided on the front surface of the case 9 and radiates the sound generated by the vibration of the unimorph diaphragms 1 and 2 to the outside.

Hereinafter, the structure of the ceramic receiver according to one embodiment of the present invention will be described in more detail with reference to FIG. FIG. 2 is an exploded view showing the components of the individually described ceramic receiver in an exploded manner. Accordingly, each of the components is the same as that shown in FIG. 1, and in order from the top, a bottom cover 7 having a back sound hole 8 in the center, and an acoustic resistance material 6
, Coil 4, and insulator ring 3 incorporating terminal 5
And a unimorph diaphragm composed of the piezoelectric element 1 and the metal plate 2 and a case 9 having a front sound hole 10 in the center. Then, all of these components are united together in the same order to form the ceramic receiver shown in FIG.

Next, with reference to FIGS. 3 to 7, the details of each component and how the components are assembled will be described. FIG. 3 is a perspective view of the terminal 5 clearly showing a processed shape before being fixed to the insulator ring 3. A plurality of the terminals 5 are manufactured in a continuous state, and the rear ends of the signal input terminals 5a and 5b are fixed to the insulator ring 3 while being connected.

It can be seen that the coil connection terminals 5c, 5d are formed in a structure rising from the surfaces of the signal input terminals 5a, 5b, that is, an exposed structure separated from the ring 3. Thereby, when soldering the coil connection wires 11, it is possible to prevent the heat from the soldered portion from being conducted to other terminal portions or the insulator ring 3 to deteriorate them. The terminal 5 is further formed with concave (may be convex) terminal retaining grooves 5h and 5i.
To prevent them from moving when housed in The terminal retaining groove 5h prevents the terminal 5 from being pulled out in the longitudinal direction, and the terminal retaining groove 5i prevents the terminal 5 from being pulled out in the upward direction or prevents the terminal 5 from rotating. Further, a terminal radiating hole 5g is formed on the terminal 5, and is used for heat radiation during manufacturing and use.

FIG. 4 is a perspective view showing a state in which the terminal 5 shown in FIG. 3 is inserted and fixed to the insulator ring 3 in which the unimorph diaphragms 1 and 2 are incorporated. Terminal 5 is insulator ring 3
And fixed with insulating material such as resin, the diaphragm connection terminals 5j and 5k at the ends thereof are soldered to the piezoelectric element 1 and the metal plate 2, respectively, and the two coil connection wires 11 are connected to the coil connection terminals 5c and 5c. It is soldered to 5d and guided inside through the coil wiring gap.

FIG. 5 is a sectional view of the assembly structure of the insulator ring 3 and the terminal 5 of FIG. 4 cut along the longitudinal direction of the terminal 5. Thus, it can be seen that the three connection terminals, namely, the signal input terminals 5a and 5b, the coil connection terminals 5c and 5d, and the diaphragm connection terminals 5j and 5k are respectively formed at separate positions.

FIG. 6 shows the structure of the bottom cover 7 and the bottom cover 7.
FIG. 6 is a perspective view showing how is connected to the assembly structure of the insulator ring 3 shown in FIGS. 4 and 5. The bottom cover 7 is provided with a substantially annular reinforcing rib 7c, and the coil 4 is fitted and fixed in a space provided in the center thereof. Thereby, the coil 4 is integrally formed with the bottom lid 7,
The coil connection wire 11 is soldered to the coil connection terminals 5c and 5d when the bottom cover 7 is combined with the assembly structure of the insulator ring 3.

The assembled structure of the bottom cover 7 assembled in this manner is such that the acoustic resistance material 6 is attached inside the back sound hole 8 at the center of the bottom cover 7 and then turned upside down to the insulator ring 3. Then, the fitting pins 7b are inserted into the fitting holes 3b to be integrally connected. By inserting the fitting pin 7b into the fitting hole 3b and combining the two assembly structures of the insulator ring 3 and the bottom cover 7, the two assembly structures are prevented from rotating with each other and the coil connection wire 11 is prevented.
To prevent disconnection, and reinforce the combined assembly structure.

In addition, when the two assembled structures of the insulator ring 3 and the bottom cover 7 are combined, the outer wall 7 of the reinforcing rib 7c is
a and the inner wall 3a of the insulator ring 3 are substantially fitted into the fitting, and when an external pressure is applied to the insulator ring 3, it is applied to the outer wall 7a of the reinforcing rib 7c via the inner wall 3a. Receiving and absorbing, as well as reinforcing the bottom lid 7,
Use it to help reinforce the entire assembly structure.

FIG. 7 is a cross-sectional view showing a combined state of the assembly structure of the bottom cover 7 and the assembly structure of the insulator ring 3 along a plane passing through the fitting pin 5b and the fitting hole 3b. . This clarifies the fitting state of the fitting pin 7b and the fitting hole 3b, and the state in which the two assembly structures of the insulator ring 3 and the bottom cover 7 are combined.

The assembled structure of the bottom cover 7 and the insulator ring 3 thus combined is inserted into the case 9 and caulked at the end 9a of the case 9, and as shown in FIG. Assembled together. According to the assembling method described above, it is natural that the order of each component is as shown in FIG. In addition, the gap 5 for the coil wiring
e and 5f are sealed with a filler such as resin after assembly.

Next, the operation of the above-described ceramic receiver according to one embodiment of the present invention will be described. When a voice input signal is input to the signal input terminals 5a, 5b, one vibrates the unimorph diaphragm via the diaphragm connection terminals 5j, 5k to generate a sound wave, and the sound is emitted from the front sound hole 10. On the other hand, the audio input signal is transmitted to the coil 4 via the coil connection wire 11 to generate a leakage magnetic flux, and is used for another purpose such as a hearing aid. The acoustic resistance material 6 acts to dampen the resonance vibration of the unimorph diaphragm and contribute to the flattening of the frequency characteristics.

[0033]

The present invention is configured as described above,
A terminal with a structure that eliminates the coil bobbin for the coil and fixes the coil to a part of the main body structure, removes the printed circuit board, and connects the signal input terminal directly to the coil lead wire and the unimorph diaphragm Is integrated with the insulator ring, the ceramic receiver can be made very small and simple in structure.

Further, according to the present invention, the three portions for connecting the input signal line of the signal input terminal, the lead wire of the coil, and the diaphragm connection terminal are formed apart from each other and formed at a position away from the insulator ring. By doing so, it is possible to reduce the influence of heating between the three parts and to the insulator ring to prevent deformation of the terminal, melting of the resin, and the like. By adopting a structure capable of ensuring the stability of the structure, it has become possible to efficiently manufacture a low-cost, high-quality, and stable product with high productivity.

Further, according to the present invention, a part of the main body structure and the insulator ring are provided with a fitting structure for integrally connecting and holding them therebetween and a reinforcing structure for protecting the main body structure from external pressure. By doing so, it is possible to provide a high-quality and stable ceramic receiver that is strong against external pressure, has high strength, and does not break due to rotation between the structural parts. .

[Brief description of the drawings]

FIG. 1 is a structural sectional view of a ceramic receiver according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the configuration of the ceramic receiver according to the embodiment of FIG. 1;

FIG. 3 is a perspective view showing a processed shape of the terminal of the ceramic receiver according to the embodiment of FIG. 1 before assembling;

FIG. 4 is a perspective view showing a method for processing an insulator ring of the ceramic receiver according to the embodiment of FIG. 1;

FIG. 5 is a sectional view showing the configuration of an insulator ring and a signal input terminal of the ceramic receiver according to the embodiment of FIG. 1;

FIG. 6 is a perspective view showing a coupling structure of an insulator ring and a bottom cover of the ceramic receiver according to the embodiment of FIG.

FIG. 7 is a sectional view showing a state where the insulator ring and the bottom cover of the ceramic receiver according to the embodiment of FIG. 1 are combined;

FIG. 8 is a structural sectional view of a conventional ceramic receiver.

FIG. 9 is a perspective view showing the appearance of a conventional ceramic receiver.

[Description of Signs] 1 piezoelectric element 2 metal plate 3 insulator ring 3a inner wall 3b fitting hole 4 coil 5 terminal 5a, 5b signal input terminal 5c, 5d coil connection terminal 5e, 5f gap for coil wiring 5j, 5k diaphragm connection Terminal 5h, 5i Terminal retaining groove 5g Terminal radiating hole 6 Acoustic resistance material 7 Bottom lid 7a Outer wall 7b Fitting pin 7c Reinforcement rib 8 Back sound hole 9 Case 10 Front sound hole 11 Coil connection line 21 Insulator ring 22 Metal plate 23 Piezoelectric element 25 Printed circuit board 27 Rivets 28 Case 29 Winding bobbin 30 Coil 31 Contact terminal 32 Front sound hole 33 Back sound hole 34 Wiring pattern

Claims (4)

(57) [Claims] 1. A unimorph vibrating plate comprising a unimorph vibrating plate made of a piezoelectric element bonded to a metal plate, a coil for generating a leakage magnetic flux fixed to a part of a main body in an integrated structure, and a signal input terminal integrally formed. And an insulator ring integrally fixed with a part of the main body, wherein the signal input terminal is directly coupled to the input signal line, the lead wire of the coil, and the unimorph diaphragm. Ceramic receiver. 2. The signal input terminal according to claim 1, wherein connection portions for connecting the input signal line, the lead wire of the coil, and the unimorph diaphragm are formed at three separate positions. Ceramic receiver. 3. A part of the main body and the insulator ring are provided with a fitting structure for integrally connecting the part of the main body and the insulator ring therebetween so as to maintain the connected state. The ceramic receiver according to claim 1, wherein a reinforcing member that protects from an external pressure is formed in the portion in cooperation with the insulator ring. 4. The signal input terminal includes a pull-out prevention structure from a state where the signal input terminal is integrally formed with the insulator ring in cooperation with the insulator ring, and separates each of the connection portions from the insulator ring. The ceramic receiver according to claim 1, wherein the ceramic receiver is formed at a position.