KR101873492B1 - Damper for electro sound transducer - Google Patents

Abstract

The present invention relates to a damper for an electroacoustic transducer, and more specifically, to a damper for an electroacoustic transducer, the damper which has an increased elastically supporting force, electrical conduction, and connectivity and has an improved structure. The damper (10) for an electroacoustic transducer elastically supports a vibration unit (4), which is located in a gap of a magnetic circuit unit (3) arranged in an inner center of a frame (2) of the electroacoustic transducer and comprises a vibration plate (4a) and a voice coil (4b), to the frame (2) and comprises: a hard printed circuit board (H-PCB) main body (11) having an elastic arm (11c) which connects the outer circumference (11a), fixated to a circular protrusion (2a) in the frame (2), to the center circumference (11b), fixating and supporting the vibration unit (4), and provides elastically supporting force; a pair of conductive patterns (12) which are arranged on one side of the outer circumference, pass over elastic arms (11c) of different routes, and are arranged on the center circumference (11b); and a connection means (13) which electrically connects the frame (2) to an external connection unit (5), a connection PCB for inputting an external electrical signal, arranged on the outside while the frame (2) is fixated to one end portion of each conductive pattern (12).

Description

[0001] DAMPER FOR ELECTRO SOUND TRANSDUCER [0002]

[0001] The present invention relates to a damper for an electroacoustic transducer, and more particularly to a damper for an electroacoustic transducer, which comprises a vibrating portion (voice coil) located in a gap of a magnetic circuit portion provided at an inner center of a frame of an electroacoustic transducer, The material hardness of the damper and the conduction path of the electric signal and the connection structure are changed so that the east portion (voice coil) can be accurately operated (in the vibration region) at the gap of the magnetic circuit portion And more particularly, to a damper for an electroacoustic transducer having improved structure and improved electrical continuity and connectivity.

Generally, a damper refers to a device that generates a damping force in order to attenuate vibration or lower the vibration level in the vicinity of resonance.

However, in the electroacoustic transducer series, the damper has a function of centering the voice coil so that the voice coil constituting the vibration part together with the diaphragm can accurately operate between the gaps of the magnetic circuit part, That is, it is an element that connects the middle part of the diaphragm and the voice coil and the frame of the electroacoustic transducer, and supports the vibration part to prevent excessive movement of the vibration area.

The related art related to the damper of the electroacoustic transducer will be described as follows.

A conventional art relating to a damper of a conventional electroacoustic transducer is, for example, Korean Patent Registration No. 10-1026987 (see FIG. 1).

Japanese Patent Application Laid-Open No. 10-1026987 discloses a speaker having a yoke, a permanent magnet, an upper plate, a voice coil, an integrated diaphragm integrated with the edge, and a frame. The speaker is located below the diaphragm, and one end is attached to the periphery of the diaphragm A B-damper to which the other end is attached to the frame and in which a hole through which the voice coil passes can be formed; And an FPCB installed at a lower portion of the B-damper and connected to a lead wire of the voice coil, wherein a hole through which the voice coil passes can be formed. The voice coil passes through the FPCB and the B- Wherein the FPCB is fixed to the frame, the B-damper includes an elliptical outer member extending from an annular protrusion protruding out of the frame; And a half-shell type inner member spaced apart from the outer member by a predetermined distance, wherein the outer member and the inner member are formed in a single shape so that the voice coil passes through the outer side of the inner member and the inner side of the outer side member And a speaker having a B-damper and an FPCB.

In the conventional damper, the FPCB is laminated and fixed to the B-damper, and the B-damper performs the damping function of the conventional electroacoustic transducer, and the pattern of the FPCB provides the flow path of the electric signal .

However, since the conventional damper of the prior art as described above requires the B-damper and the FPCB to be laminated and fixed, it is complicated to manufacture a damper, requires a high cost, and has low manufacturing cost and low price competitiveness. In addition, since the B-damper and the FPCB have different thermal stress resistance indices, there is a problem that the fixing structure is broken when the deformation is caused by heat. Moreover, since the PCB, which is an external electrical signal input unit provided outside the frame of the FPCB, is connected to the pattern of the FPCB by electric wires, there is a problem that the operation of pulling out the electric wires from the frame and connecting them by soldering is very troublesome.

Next, another prior art related to a damper of a conventional electroacoustic transducer is the Korean Patent Registration No. 10-1112130.

In the micro speaker having a yoke, a permanent magnet, an upper plate, a voice coil, an edge, a diaphragm, and a frame, the diaphragm is provided with an electrode connection part capable of receiving an external signal and a suspension, Wherein the diaphragm is formed by depositing a conductive metal thin film on a nonconductive polymer film, patterning the electrode connecting portion and the suspension in the deposited metal thin film, and then patterning the upper and lower portions of the patterned metal thin film And a vibration module having a vibration plate and a suspension integrated with each other.

However, in the above-mentioned other conventional art, a pattern which is a flow path of an electric signal is formed on the diaphragm. This is merely that the diaphragm itself serves as the FPCB. In this case, the pattern performs the function of supporting and holding the vibration of the diaphragm And there is a problem that the output characteristic is deteriorated due to the limitation of supporting and maintaining the vibration. Particularly, there is a problem that the applicability is limited as an inadequate structure for an electroacoustic transducer requiring high output.

In addition, when the conventional dampers for the electroacoustic transducer are made of FPCB and are soldered to connect the terminals of the voice coil or for connection to the external electrical signal input unit, the dampers for FPCB There is a problem that the lead wire whose shape is deformed or pattern is peeled off.

In addition, in the conventional damper for electroacoustic transducer, a suspension made of a conductive metal material may be applied as a damper. However, in this case, since the metallic suspension is not restored after deformed (damaged) by external action (pressure or impact) There is a problem that the vibration support characteristic is largely changed (characteristic deviation is significant), which affects the output characteristics of the electroacoustic transducer.

The brief information of the prior art document related to the damper of the electroacoustic transducer or the electroacoustic transducer of the present invention is as follows.

Document 1: Korean Patent Registration No. 10-1026987 (name: Speaker having B-damper and FPCB; filing date: May 11, 2009)

Document 2: Korean Patent Registration No. 10-1112130 (name: a slim type micro speaker having a vibration module in which a diaphragm and a suspension are integrated) filed on April 02, 2010

According to an aspect of the present invention, there is provided an electroacoustic transducer, comprising: a vibrating part (voice coil) disposed in a gap of a magnetic circuit part provided at an inner center of a frame of an electroacoustic transducer, The material hardness of the damper and the conduction path of the electric signal and the connection structure are changed so that the coil can be accurately operated in the air gap of the magnetic circuit portion And an object of the present invention is to provide a damper for an electroacoustic transducer which is improved in electrical conduction and connectivity.

The present invention for achieving the above object is to provide a vibration plate 4a and a voice coil 4b including a diaphragm 4a and a voice coil 4b located in a space of a magnetic circuit part 3 provided at the center inside the frame 2 of the electroacoustic transducer 1, (10) fixed to the protruded tip (2a) inside the frame (2) and an outer frame (11a) fixed to the frame (2) An H-PCB main body 11 (Hard PCB: hard printed circuit board) having a carbon footprint 11c for connecting between the central rims 11b for fixing the bottom surface of the H-PCB 11a and providing elastic support force. A pair of conductive patterns 12 arranged at a central rim 11b of the outer rim 11a through the carbide arms 11c of different paths; A connection means 13 electrically connected to an external connection portion 5 (a connection PCB for external electrical signal input) provided outside the frame 2 in a state of being fixed to one end of each conductive pattern 12; And is characterized by comprising

According to the present invention, the damper 10 is constituted by an H-PCB main body 11 having an outer frame 11a, a central frame 11b and a bulging cam 11c, A pair of conductive patterns 12 reaching the center frame 11b through the carbide rocks 11c of different paths are provided on one side of the conductive patterns 12a and the external connection portions 5 are formed on one side of the respective conductive patterns 12, The damper can be manufactured more easily than the damper including the conventional FPCB in which the B-damper and the FPCB are laminated and bonded together with the adhesive by providing the connecting means 13 for electrically connecting the damper and the FPCB, Thereby achieving an effect of improving price competitiveness.

In addition, the present invention provides the effect of preventing the deformation of the damper or the damage of the connection portion due to the thermal stress generated in the soldering or operation process by manufacturing the damper 10 through the H-PCB made of hard material.

Further, according to the present invention, since the connection between the conductive pattern 12 and the external connection portion 5 is made through the soldering to the connection means 13 (connection pin) instead of the electric wire, the connection operation and the connection operation are facilitated And at the same time, the effect of increasing the connection holding force is obtained, and also the effect of automating the manufacturing process through the surface mounting (mounting) is obtained.

In addition, the present invention achieves the effect of preventing the degradation of the output characteristics while completely performing the function of supporting and holding the vibration of the diaphragm as compared to the damper to which the conventional FPCB is applied.

In addition, since the damper is made of a hard H-PCB, the present invention is not restored after deforming (deforming) the shape due to external action (pressure or impact), so that the vibration support characteristic is largely changed , Unlike the conventional metallic suspension dampers which affect the output characteristics of the electroacoustic transducer, even if the deforming is not performed easily due to the external action, the change of the vibration characteristic is extremely small, The output characteristic stabilization effect is obtained.

1 is an exploded perspective view showing the configuration of a conventional electroacoustic transducer and a damper.
2 is a perspective view illustrating a configuration according to an embodiment of the present invention;
3 is an exploded perspective view illustrating a configuration and an application example according to an embodiment of the present invention.
4 is a cross-sectional side view showing a structure or structure according to an embodiment of the present invention;
FIG. 5 is an exploded perspective view of a damper and a vibration part showing a configuration according to another embodiment of the present invention. FIG.
6 is a partial side cross-sectional view showing a structure or structure according to another embodiment (Fig. 5) of the present invention.
FIG. 7 is an exploded perspective view illustrating a frame and a damper according to another embodiment of the present invention. FIG.
8 is a partial side cross-sectional view showing a structure and a structure according to still another embodiment (Fig. 7) of the present invention.

The present invention will now be described with reference to the accompanying drawings.

2 to 4, a damper 10 for an electroacoustic transducer according to the present invention is disposed at a space of a magnetic circuit portion 3 provided at the center inside the frame 2 of the electroacoustic transducer 1 (10) for elastically supporting a vibrating section (4) including a diaphragm (4a) and a voice coil (4b) for vibrating the diaphragm (4a) And an H-PCB main body 11 (Hard PCB) having an outward rim 11a fixed to the base portion 2a and a central frame 11b fixing and supporting the vibration portion 4 and having a bullet- : Rigid printed circuit board); A pair of conductive patterns 12 arranged at a central rim 11b of the outer rim 11a through the carbide arms 11c of different paths; A connection means 13 electrically connected to an external connection portion 5 (a connection PCB for external electrical signal input) provided outside the frame 2 in a state of being fixed to one end of each conductive pattern 12; As shown in FIG.

Here, the electroacoustic transducer 1 of the present invention has a groove or a through hole so that the magnetic circuit part 3 is seated and fixed at the center thereof, and the damper 10 is fixed to the outside of the groove or the through hole concentrically An upper open frame (2) provided with a protruding upward protruding portion and formed with an outer frame at a distance concentrically with the protruding portion; A magnetic circuit part 3 composed of a laminate of a yoke 3a, a magnet 3b and a top plate 3c and fixed to an inner central part of the frame 2; And a bobbin 4c on which a voice coil 4c is wound at a center of one side (a face in the direction of the magnetic circuit) of the diaphragm 4a. The bobbin 4c is wound around the outer frame portion of the frame 2, A vibrating part 4 whose voice coil 4b is positioned at a gap between the yoke 3a and the magnet 3b; An external connection portion 5 fixed to an outer portion of the frame 2 to provide a soldering portion of a path connecting the external electric signal supply path and the voice coil 4b; A damper (10) elastically supporting the vibration section (4) with respect to the frame (2); And may be a speaker that vibrates through mutual reaction with the magnetic circuit unit 3 according to an alternating signal applied to the voice coil 4b and outputs sound.

The H-PCB main body 11 of the damper 10 according to the present invention has a circular outer frame 11a and an outer frame 11a concentrically spaced from the outer frame 11a by a board made of an epoxy or bakelite resin, A center frame 11b provided on the outer edge 11a of the substrate 10 and a protrusion 11c connecting the outer frame 11a and the center frame 11b in the same body, A resist is printed only on a portion to be the actual conductive pattern 12, copper is removed except for the portion of the conductive pattern protected by the resist using an etching solution, and the connection means 13, (Through hole) may be formed in the pattern of the portion to which the terminals of the coil 4b are to be soldered.

The conductive pattern 12 of the present invention is formed so as to extend from one side of the outer frame 11a constituting the H-PCB main body 11 to the central frame 11c via the other pilfering arms 11c It may be a pair of conductive paths.

On the other hand, in the present invention, the connecting means 13 may be a pair of connecting pins whose one end is passed through the head 13a whose diameter is enlarged and whose cross-section is " † ".

At this time, the connection pin as the connection means 13 is connected to the conductive pattern 12 formed on the H_PCB main body 11, as shown in an enlarged view of FIG. 4, And the connecting pin may be downwardly passed from the upper part of the outer frame 11a so that the part of the head 13a is connected to the upper part of the outer frame 11a And may be soldered and heat-sealed.

Hereinafter, the operation of the present invention will be described.

First, the damper 10 for an electroacoustic transducer according to the present invention is connected between an outer frame 11a fixed to a protruding projection 2a on the inside of the frame 2 and a central frame 11b fixedly supporting the vibration unit 4 An H-PCB main body 11 (Hard PCB: rigid printed circuit board) having a carbon footprint 11c for providing elastic support force; A pair of conductive patterns 12 arranged at a central rim 11b of the outer rim 11a through the carbide arms 11c of different paths; A connection means 13 electrically connected to an external connection portion 5 (a connection PCB for external electrical signal input) provided outside the frame 2 in a state of being fixed to one end of each conductive pattern 12; .

Here, the outer frame 11a constituting the H-PCB 11 is adhered or welded and fixed in a state of being mounted on the projecting shoulder 2a of the frame 2.

The central rim 11b constituting the H-PCB 11 is adhered and fixed to the outer peripheral surface of the bobbin 4c constituting the vibrating portion 4. [

The carbon film 11c constituting the H-PCB 11 may have an angle of approximately 60 to 100 mm at one side connected to the outer frame 11a and at the other side connected to the center frame 11b. And extends in an arc shape at a spaced-apart portion between the outer frame 11a and the central frame 11b.

The conductive pattern 12 is formed on one side of the outer frame 11a constituting the H-PCB main body 11 and a pair of conductors Path. In this case, external electrical signals (e.g., signals having polarities and frequencies) are conducted through different conductive patterns 12.

The connection means 13 is a connection pin having a cross section of an â " â " shape with a head 13a whose diameter is widened at one end.

One end of the connection pin protruding from the head 13a is protruded upward from the bottom of the outer frame 11a of the H_PCB body 11, And the other end of the connection pin (an end portion having a relatively long length) is soldered to the external connection portion 5 provided outside the frame 2 through the frame 2, or the other end of the connection pin A portion of the head 13a penetrates downward from the top of the outer frame 11a and is soldered to one end portion of the conductive pattern 12 while being positioned on the top of the outer frame 11a.

The H-PCB main body 11 of the damper 10 includes a circular outer frame 11a and an outer frame 11a concentrically spaced from the outer frame 11a by epoxy or bakelite resin, A center frame 11b and a protrusion 11c for connecting the outer frame 11a and the center frame 11b in the same body, The resist is printed only on the portion to be the actual conductive pattern 12 and the copper except for the conductive pattern portion protected by the resist is removed by using the etching solution and the connection means 13 and the voice coil 4b (Through hole) is formed in the pattern of the portion to be soldered and connected to the terminals.

According to the present invention as described above, the voice coil 4b vibrates through mutual reaction with the magnetic circuit part 3 in accordance with an electric signal applied from the outside, that is, an alternating signal, so that the diaphragm 4a vibrates, .

At this time, the damper 10 elastically supports the bobbin 4c wound with the voice coil 4b so that the vibrating portion 4 can be accurately operated (operated in the vibration region) at the gap of the magnetic circuit portion 3 .

The damper 10 of the present invention is made of a rigid H-PCB so that it can carry out the function of supporting the damper as described above, so that external electrical signals can be conducted to the voice coil 4b without electric wires .

The damper 10 is constituted by the H-PCB main body 11 composed of the outer frame 11a, the central frame 11b and the carbon foot 11c, and the damper 10 is formed on one side of the outer frame 11a. A pair of conductive patterns 12 reaching the central rim 11b through the carbon brush 11c of another path are provided and electrically connected to the external connection portion 5 at one end of each conductive pattern 12 Compared to a damper including a conventional FPCB in which a B-damper and an FPCB are laminated and bonded together with an adhesive agent, the manufacturing of the damper is simplified to improve the productivity and manufacture at a low cost It is possible to improve price competitiveness.

Further, according to the present invention, the damper 10 is manufactured through the H-PCB made of a hard material, so that it is possible to prevent deformation of the damper or damage to the connection portion due to thermal stress generated during soldering or operation.

Further, according to the present invention, since the connection between the conductive pattern 12 and the external connection portion 5 is made through the soldering to the connection means 13 (connection pin) instead of the electric wire, the connection operation and the connection operation are facilitated It is possible to obtain the effect of increasing the connection holding force while allowing the automation of the manufacturing process through the surface mounting (mounting).

Further, the present invention can completely prevent the vibration of the diaphragm from being deteriorated while performing the function of supporting and holding the vibration of the diaphragm as compared with the damper to which the conventional FPCB is applied.

In addition, since the damper is made of a hard H-PCB, the present invention is not restored after deforming (deforming) the shape due to external action (pressure or impact), so that the vibration support characteristic is largely changed , Unlike the conventional metallic suspension dampers which affect the output characteristics of the electroacoustic transducer, even if the deforming is not performed easily due to the external action, the change of the vibration characteristic is extremely small, It is possible to stabilize the output characteristics.

Other embodiments of the present invention as described above are as follows.

First, the present invention is characterized in that, as shown in FIG. 5, the center rim 11b constituting the H-PCB main body 11, which is in contact with the bobbin 4c constituting the vibration section 4, A lead-out groove 11d may be formed to guide the end of the coil 4b to the shortest path to be connected by soldering.

The terminals of the voice coil 4b wound on the bobbin 4c do not elongate and are drawn out to the lead groove 11d immediately as shown in FIG. Thereby preventing noise from occurring due to interference with other elements in the electroacoustic transducer 1 during the vibration process, and preventing the terminal from being disconnected.

7 and 8, a fixing member 2b in the form of a groove or a through-hole is provided in a projecting shoulder 2a of the frame 2, and the damper 10, The fixing protrusion 11e may be provided on the outer circumferential surface of the outer frame 11a of the H-PCB main body 11 constituting the fixing member 2b.

At this time, one or a plurality of fixing projections 11e are provided in a direction opposite to a portion where the connecting means 13 is soldered, so that the fixing protrusion 11e is fixed to the outer connecting portion 13e of the connecting means 13 5) are firmly fixed by soldering connection.

The outer peripheral edge 11a of the H-PCB main body 11 constituting the damper 10 is fixed to the fixing member 2b having a groove or a through hole in the protruded tip 2a of the frame 2, The fixing protrusions 11e formed on the outer circumferential surface of the fixing protrusion 11e are fitted and fixed so that the fixing can be easily performed without fixing by a separate adhesive.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

In addition, 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 appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

10: damper 11: H-PCB body
11a: Outer frame 11b: Center frame
11c: burnt cancer 11d: withdrawal groove
11e: Fixing projection 12: Conductive pattern
13: Connection means 1: Electroacoustic transducer
2: frame 2a: protruding flange
2b: fixing member 3: magnetic circuit part
4: vibration part 4a: diaphragm
4b: voice coil 4c: bobbin

Claims (8)

The diaphragm 4a located at the gap of the magnetic circuit portion 3 provided at the center of the inside of the frame 2 of the electroacoustic transducer 1 and the vibrating portion 4 including the voice coil 4b are arranged with respect to the frame 2 A damper (10) for an electroacoustic transducer (10) which supports the elastic member
A bullet-proof arm 11c for connecting the outer frame 11a fixed to the protruding projections 2a inside the frame 2 and the central frame 11b for fixing the vibrating unit 4 to the frame 11b and providing a spring- An H-PCB main body 11 having an opening; A pair of conductive patterns 12 arranged at a central rim 11b of the outer rim 11a through the carbide arms 11c of different paths; A pair of connecting pins each having an â " â " -shaped cross section is fixed to one end of each conductive pattern 12 in a state in which the head 13a has a diameter enlarged in a part of one end thereof, And a connecting means (13) electrically connected to the external connection portion (5) provided on the exterior of the damper (2).
The method according to claim 1,
The H-PCB main body 11 of the damper 10 includes an outer frame 11a having a circular shape and a center rim provided concentrically at an inner side of the outer frame 11a with a substrate made of epoxy or bakelite resin, (11c) that connects the outer frame (11a) and the center frame (11b) in the same body, and a copper foil is laminated on the surface of the substrate where the conductive pattern (12) The resist is printed only on the portion to be the actual conductive pattern 12 and the copper except for the conductive pattern portion protected by the resist is removed by using the etching solution so that the connection means 13 and the voice coil 4b Wherein the terminals are formed by forming holes in a pattern of a portion to be soldered and connected.
The method according to claim 1,
The conductive pattern 12 is a pair of conductive paths formed at one side of the outer frame 11a constituting the H-PCB main body 11 and reaching the central frame 11c via the respective pilfering arms 11c And a damper for an electroacoustic transducer.
delete The method according to claim 1,
The connecting pin as the connecting means 13 has a connecting pin protruding from the head 13a and having one end of an outer frame 11a in which one end portion of the conductive pattern 12 formed on the H- And the connecting pin is pierced downward from the upper part of the outer frame (11a) so that the part of the head (13a) is located at the upper part of the outer frame (11a) and is soldered. Damper.
The method according to claim 1,
The terminals of the voice coil 4b are drawn out in the shortest path to be connected by soldering to the inner diameter of the center frame 11b constituting the H-PCB main body 11 formed in contact with the bobbin 4c constituting the vibration section 4 And a lead-out groove (11d) for guiding the damper (11) is formed.
The method according to claim 1,
A fixing member 2b in the form of a groove or a through hole is provided in the protruding root 2a of the frame 2 and a fixing member 2b is provided on the outer peripheral surface 11a of the outer frame 11a of the H- And a fixing protrusion (11e) fitted and fixed corresponding to the fixing member (2b) is provided.
The method of claim 7,
The fixing protrusion 11e is provided with one or a plurality of fixing protrusions 11e in the direction opposite to the soldering connection portion of the connecting means 13 so as to fix the fitting protrusion 11e to the outer connecting portion 5 of the connecting means 13, And the housing is fixed firmly by soldering connection with the damper for electroacoustic transducer.

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