KR20090051877A - Rivet pin of electro acoustic transducer - Google Patents

Abstract

The present invention relates to a rivet pin of an electroacoustic transducer.

The present invention is a rivet pin of an electroacoustic transducer which fixes a spring of a magnetic circuit in a casing or fixes the casing and a lid, wherein a magnetic circuit in which the spring is vibrated in response to a coil is allowed to operate normally. And a stopper on the magnetic circuit movement path of the rivet pin, for preventing vibration from exceeding the maximum range capable of vibrating and outputting sound or vibration.

The present invention prevents the leaf springs from exceeding the allowable shot force by the law of inertia by the law of inertia in the artificial drop impact such as carelessness or durability test, thereby preventing deformation of the leaf spring and breaking of the magnetic circuit or It is possible to prevent deformation and breakage of other components in the case.

Description

RIVET PIN OF ELECTRO ACOUSTIC TRANSDUCER}

The present invention relates to an electroacoustic transducer, and more particularly, to a rivet pin of an electroacoustic transducer for fixing a leaf spring supporting a magnetic circuit in a case or fixing the case and a cover.

BACKGROUND ART In general, an electroacoustic transducer is a sound output device such as a speaker, a receiver, a buzzer, a vibrator (vibrator) that converts an electrical signal input from a signal source into a mechanical signal to output sound or generate vibration force.

In the conventional electroacoustic transducer, a coil fixed to one side of a diaphragm is positioned at a gap between a magnet seated on the yoke and the yoke and a top plate, and the yoke and the magnet respond to the magnetic flux formed in the air gap according to the direction of an AC signal applied to the coil. And magnetic circuits and / or coils including the top plate and the diaphragm vibrate to generate sound or / and vibration force while outputting sound from the vibrating diaphragm.

Most of these conventional electroacoustic transducers are provided with a case for receiving and protecting the above-described magnetic circuit and the vibration structure, the leaf spring for the vibration of the magnetic circuit is fixed to the case.

At this time, the leaf spring is fixed to the case by insert injection, or is fixed by pressing through a separate ring and step, or by a rivet pin for fixing by riveting the case and the cover.

As described above, the conventional electroacoustic transducer whose magnetic circuit is supported by the case by the leaf spring cannot overcome the weight of the magnetic circuit by the law of inertia in the artificial drop impact such as carelessness or durability test, and the leaf spring exceeds the allowable shot force. It will act as a shot.

If so, the leaf spring causes a deformation of the shape, the magnetic circuit has a problem that is damaged by the impact of the collision between the case and the cover (grill).

Particularly, in the case of a multifunctional electro-acoustic transducer which outputs sound while the diaphragm having a center fixed to one side of the coil and an outer circumferential surface fixed to the case with vibration of the magnetic circuit, the magnetic circuit vibrating in response to the coil is normally Magnetic circuits exert pressure on the diaphragm by vibrating plate springs, which vibrate outside the allowable range of repulsion, which is capable of outputting sound or vibration, thereby tearing the thin diaphragm (composed of a thin synthetic resin plate).

 The present invention is a rivet pin of an electroacoustic transducer that fixes a spring of a magnetic circuit in a casing or fixes a casing and a lid, wherein the stopper prevents the spring from exceeding the limit of the shot. It is characterized in that provided on the magnetic circuit movement path of the rivet pin.

The present invention prevents the leaf springs from exceeding the allowable shot force by the law of inertia by the law of inertia in the artificial drop impact such as carelessness or durability test, thereby preventing deformation of the leaf spring and breaking of the magnetic circuit or It is possible to prevent deformation and breakage of other components in the case.

1 is an exploded perspective view showing a configuration according to an embodiment of the present invention, Figure 2 shows a configuration according to an embodiment of the present invention prior to explaining the present invention. 3 and 4 are cross-sectional views showing the operation of the present invention, Figure 5 is a cross-sectional view showing a configuration according to another embodiment of the present invention, Figures 6 to 10 are still another embodiment of the present invention It is sectional drawing which shows the structure which concerns on the example.

The present invention will be described below with reference to the accompanying drawings presented as above.

First, the present invention, as shown in the accompanying drawings, Figures 1 and 2, to secure the leaf spring 5 for supporting the magnetic circuit 3 in the case 2, or the case 2 and the cover 6 In the rivet pin (10) of the electroacoustic transducer (1) for fixing the stopper (12) of the riveting pin body (11) to prevent the leaf spring (5) from exceeding the allowable shot force to the shot action It can be provided on the magnetic circuit path of motion.

Here, the electroacoustic transducer 1 of the present invention is a coil 4a fixed to one side of the diaphragm 4 in the air gap between the magnet 3b and the top plate 3c seated on the yoke 3a and the yoke 3a. ) Is located, the magnetic circuit 3 including the yoke 3a, the magnet 3b and the top plate 3c in response to the magnetic flux formed in the void in the direction of the alternating current signal applied to the coil 4a and The coil 4a and the diaphragm 4 may be a multifunctional electro-acoustic transducer that generates vibration force or sound while vibrating.

On the other hand, in the present invention, the case 2 has an enclosure shape in which one side is opened, and a through hole 2a through which an end of the rivet pin penetrates is formed at the center portion of the bottom surface, and supports the center of the leaf spring 5. The stepped portion 2b may be formed by protruding the portion in which the through hole 2a is formed so as to support the free space in the case.

On the other hand, in the present invention, the magnetic circuit (3) comprises a yoke (3a) through the center; A magnet 3b seated on an upper surface of the yoke 3a; And a top plate 3c seated on an upper surface of the magnet 3b.

At this time, the annulus is formed on the inner circumferential surface or the outer circumferential surface of the yoke 3a, and a gap may be formed between the magnet 3b and the top plate 3c, which are seated with the annular clearance, and the magnet 3b. And the top plate 3c may have a concentric circle, and a gap may be formed between the pair of magnets 3b and the top plate 3c having different diameters.

On the other hand, in the present invention, one side surface of the coil 4a may be adhesively fixed to a central portion of one side (inner side of the case) of the diaphragm 4 in which the outer circumferential surface is fixed to the open outer circumferential surface of the case 2. In addition, one side surface may be adhesively fixed to a central portion of one side (inner side of the case) of the cover 6 inserted into the open outer circumferential surface of the case 2 to block the outside.

And, the rivet pin 10 of the present invention is a rivet pin body (11); A stopper 12 having a diameter larger than that of the rivet pin body 11 at one end of the rivet pin body 11; It may be configured to include; rivet projection (13) formed to be reduced in diameter smaller than the rivet pin body 11 on the other end of the rivet pin body (11).

At this time, the stopper 12 may be located between the magnetic circuit 3 and the diaphragm 4 or the cover 6, the position of the magnetic circuit vibrating in response to the coil of the leaf spring (5) normally vibrates It is preferable to be within the allowable shot force that is the maximum range that can output sound or vibration.

In addition, a portion of the riveting pin body 11 and the rivet protrusion 13 that borders the center of the leaf spring 5 through which the rivet protrusion 13 penetrates the stepped portion 2b of the case 2. Secure the part tightly.

In addition, the rivet protrusion 13 penetrates the through hole 5a of the leaf spring 5 and the through hole 2a formed in the step 2b of the case 2 to be riveted to the case 2 bottom surface. do.

In the present invention configured as described above, the coil 4a fixed to one side of the diaphragm 4 is positioned in the gap between the magnet 3b and the top plate 3c seated on the yoke 3a and the yoke 3a. And the magnetic circuit 3 including the yoke 3a, the magnet 3b, and the top plate 3c vibrate in response to the magnetic flux formed in the air gap in the direction of the alternating current signal applied to the coil 4a. The vibration plate 4 also vibrates and generates sound in accordance with the frequency of the AC signal.

The above operation is performed by the normal vertical vibration of the magnetic circuit 3, the coil 4a, and the diaphragm 4, and the magnetic circuit 3, the coil 4a, and the diaphragm 4 do not cause mutual interference. .

At this time, if the electroacoustic transducer 1 causes the leaf spring 5 not to beat the weight of the magnetic circuit 3 by the law of inertia in the artificial drop impact such as carelessness or durability test, it will exceed the allowable value of the shot force. In this case, the magnetic circuit 3, the coil 4a and the diaphragm 4 may cause mutual interference.

However, the present invention is a stopper of the rivet pin 10, even if the leaf spring (5) does not overcome the weight of the magnetic circuit (3), and the shot spring exceeds the allowable shot limit, the shot spring Since the 12 blocks the magnetic circuit 3 to move out of the allowable hit force, the leaf spring 5 is prevented from being deformed.

As described above, the magnetic circuit 3 is configured to prevent the magnetic circuit 3 from escaping in the diaphragm 4 direction, and as shown in FIG. 4, the magnetic circuit 3 exceeds the elastic limit in the opposite direction. In this case, the inner surface of the case 2 is prevented from escaping the allowable shot force.

Meanwhile, as shown in FIG. 5, the present invention further provides a stopper 2 (14) identical to that of the stopper 12 at a boundary portion between the riveting main body 11 and the rivet protrusion 13 to provide a magnetic circuit 3. ) May be prevented from directly colliding with the lower surface of the leaf spring (5) for supporting the magnetic circuit 3 and the inner surface of the case (2) out of the allowance of the hit.

On the other hand, the present invention may further provide a stopper 3 (15) by bending the stopper 12 or the outer peripheral surfaces of the stopper 12 and the stopper 14, as shown in FIG. In this case, the stopper 12 and the stopper 2 14 prevent the magnetic circuit 3 from exceeding the allowable shot force in the vertical direction, and the stopper 3 15 has the allowable shot force of the magnetic circuit 3 in the horizontal direction. The author will exceed. That is, when the impact force is transmitted from the side of the case, the stopper 3 (15) corresponds to the inner circumferential surfaces of the yoke (3a), the magnet (3b) and the top plate (3c) while preventing the leaf spring (5) from being directed to one side, The collision with the side surface of the case 2 can be prevented.

On the other hand, according to the present invention, as shown in Figure 7, by attaching the buffer 16, such as rubber, silicon, air layer tube to the surface of the stopper 12 that collides with the magnetic circuit 3 Shock and noise can be alleviated by collision.

On the other hand, the present invention, as shown in Figure 8 of the accompanying drawings, by providing a rivet pin (10) integrally at the center of one side of the cover 6, to open the part of the case 2 with the cover (6) The cover may be fixed to the case 2 with the rivet pin 10.

On the other hand, the present invention, as shown in Figure 9, the rivet projection 13 is formed in the trapezoid protrusion projecting in the upper end from the center portion of the end of the rivet projection 13 is formed can be formed have. In this case, the rivet pin 10 is notched in the process of penetrating the through hole 5a of the leaf spring 5 and the through hole 2a formed in the step 2b of the case 2. When the portion is pushed inwardly and contracted, the projecting into the lower surface of the case (2), the bullet fitting jaw (17) is elastically extended to the outside, it is possible to fasten with the case (2) without a separate riveting process.

Finally, the present invention may be applied to an elliptical electroacoustic transducer 1 having a long axis and a short axis, as shown in FIG. 10. In this case, the case 2, the yoke 3a, the magnet 3b, the top plate 3c, the diaphragm 4, the coil 4a, the leaf spring 5, the cover 6 and the rivet pin 10 ) Are all oval, and at this time, only the through-hole 2a of the case 2 and the rivet protrusion 13 portion of the rivet pin 10 may be circular, and the through-hole 2a of the case 2. And rivet projections 13 of the rivet pin 10 is preferably made of one or more than three of the number.

While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described.

Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

1 is an exploded perspective view showing a configuration according to an embodiment of the present invention.

2 is a cross-sectional view showing a configuration according to an embodiment of the present invention.

3 and 4 are cross-sectional views showing the operation of the present invention.

5 is a cross-sectional view showing a configuration according to another embodiment of the present invention.

6 to 10 are cross-sectional views showing a configuration according to another embodiment of the present invention.

      <Description of the symbols for the main parts of the drawings>

10: rivet pin 11: rivet pin body

12: stopper 13: rivet protrusion

14: stopper 2 15: stopper 3

16: buffer 1: electroacoustic transducer

2: case 2a: through hole

2b: step 3: magnetic circuit

3a: York 3b: Magnet

3c: top plate 4: diaphragm

4a: coil 5: leaf spring

6: cover

Claims (14)

In the rivet pin 10 of the electroacoustic transducer 1 which fixes the leaf spring 5 which supports the magnetic circuit 3 in the case 2, or fixes the case 2 and the cover 6 In addition, the rivet pin 10 is characterized in that the stop spring 12 is provided on the magnetic circuit movement path of the rivet pin main body 11 to prevent the leaf spring 5 from exceeding the allowable shot force to the shot action Rivet pin of acoustic transducer. According to claim 1, wherein the rivet pin 10 is a rivet pin body (11); A stopper 12 having a diameter larger than that of the rivet pin body 11 at one end of the rivet pin body 11; The rivet pin of the electroacoustic transducer, characterized in that it comprises a; rivet projection (13) formed on the other end of the rivet pin main body 11 is reduced in diameter smaller than the rivet pin main body (11). 2. The rivet pin of an electroacoustic transducer according to claim 1, wherein the stopper (12) is located between the magnetic circuit (3) and the diaphragm (4) or the cover (6). 3. The leaf spring (5) according to claim 2, wherein the portion that is the boundary between the rivet pin body (11) and the rivet protrusion (13) is seated on a step (2b) protruding upward from an inner central portion of the case (2). Rivet pin of the electroacoustic transducer, characterized in that tightly penetrating through the central portion of the). The case (2) of claim 2, wherein the rivet protrusion (13) passes through a through hole (5a) formed in the center of the leaf spring (5) and a through hole (2a) formed in the stepped portion (2b) of the case (2). ) The rivet pin of the electroacoustic transducer, characterized in that the bottom surface is riveted. 3. The rivet pin of an electroacoustic transducer according to claim 2, wherein a stopper 2 (14) identical to the stopper (12) is further provided at the boundary between the riveting main body (11) and the rivet protrusion (13). 7. The rivet pin according to claim 2 or 6, further comprising a stopper (3) or a stopper (3) formed by bending the outer peripheral surfaces of the stopper (12) and the stopper (14). The shock absorber 16 according to any one of claims 1, 2, 3 or 6, wherein the buffer 16 is provided on the surface of the stopper 12 and the surface of the stopper 2 14 which are in collision with the magnetic circuit 3. Rivet pin of the electroacoustic transducer, characterized in that the adhesive is provided. The rivet pin of an electroacoustic transducer according to claim 1, wherein a rivet pin (10) is integrally provided at the center of one side of the cover (6). 3. The rivet pin of an electroacoustic transducer as set forth in claim 2, wherein the rivet projection has a trapezoidal protrusion (17) formed at an end of the rivet protrusion (13) and cut out inward from the center of the end portion. The coil 4a of claim 1, wherein the rivet pin 10 is fixed to one side of the diaphragm 4 at a space between the magnet 3b and the top plate 3c seated on the yoke 3a and the yoke 3a. ) Is located, the magnetic circuit 3 including the yoke 3a, the magnet 3b and the top plate 3c in response to the magnetic flux formed in the void in the direction of the alternating current signal applied to the coil 4a and The rivet pin of the electroacoustic transducer, characterized in that it is applied to a multifunctional electroacoustic transducer that generates a vibration force or sound while the coil (4a) and the diaphragm (4) vibrates. According to claim 1, wherein the rivet pin (10) has an open shape in one side direction, a through hole (2a) through which the rivet projection 13 is formed in the center of the bottom surface, the leaf spring (5) ) Is applied to the case (2) formed with the step (2b) formed by protruding upwards inwardly to support the center and to be located in the free space in the case Rivet pin. According to claim 1, wherein the rivet pin 10 is yoke (3a) through the center; A magnet 3b seated on an upper surface of the yoke 3a; A rivet pin of an electroacoustic transducer, characterized in that it penetrates the center of the magnetic circuit (3) including a top plate (3c) seated on the upper surface of the magnet (3b). The rivet pin according to claim 1, wherein the rivet pin (10) penetrates a central portion of the diaphragm (4) whose outer circumferential surface is fixed to the open outer circumferential surface of the case (2).

Images