KR101911890B1 - Damper for speaker and slim type speaker - Google Patents

Abstract

The present invention relates to a damper for a speaker and a slim speaker. More specifically, the damper for a speaker, which is inserted into a frame and is attached to a voice coil to maintain vibration, comprises: a coupling unit coupled to the frame to be supported by the frame; an adhering unit attached to the voice coil to support the voice coil; and a connecting unit for interconnecting the coupling unit and the adhering unit. The coupling unit, the adhering unit, and the connecting unit are formed by stacking an epoxy plate formed with an epoxy material having excellent elasticity, and a reinforcement plate arranged on at least any one side of upper and lower surfaces of the epoxy plate and formed with a material selected from a polyimide or an aramid fiber having excellent tensile strength.

Description

[0001] The present invention relates to a damper for a speaker and a slim type speaker,

The present invention relates to a speaker damper and a slim speaker, and more particularly, to a speaker damper having a good elasticity and a good tensile force, and a slim speaker including the damper.

Due to the recent rapid development of display devices, various flat panel display devices such as LCD, plasma TV, and LED TV have been popularized, so that the components used in such display devices are required to be very small and slim.

In particular, a speaker is a device that generates sound by vibrating a diaphragm by the motion of a voice coil when a current flows through a voice coil in a magnetic field using a magnet, which is one of the components that are difficult to be miniaturized and slim.

Such a micro speaker generally comprises a case injection-molded with a synthetic resin and accommodating a component constituting a speaker, a yoke, a magnet, and a plate which are sequentially received while being housed in the case, a damper, a voice coil fixed to the underside of the damper, And a diaphragm.

When a predetermined electric signal is applied to the voice coil, the diaphragm vibrates together with the voice coil by the action of the electromagnetic force formed on the voice coil and the magnetic force formed on the yoke, the magnet and the plate, thereby generating sound. At this time, the damper is attached to the voice coil to perform the function of maintaining the vibration.

Korean Patent No. 10-0963559 discloses a 'slim type speaker', which comprises: a frame; A yoke disposed on the frame so as to protrude from a bottom of the frame, the yoke being opposed to the frame at regular intervals; A magnet disposed above the yoke; A plate provided on the magnet, respectively; A voice coil disposed on an outer circumferential surface of the plate; A flexible printed circuit board electrically connected to the voice coil and the external terminal, respectively, and mounted on the frame; An edge disposed on an upper portion of the flexible printed circuit board and provided on the frame; And a diaphragm disposed on an upper portion of the flexible printed circuit board and a center of the edge, the diaphragm being provided in the frame.

Korean Patent No. 10-0963559 discloses a flexible printed circuit board in which a base made of polyimide and an electric circuit pattern are formed on the base, And a damper can be eliminated, so that a thin speaker can be realized.

However, in Korean Patent No. 10-0963559, since the flexible printed circuit board replacing the damper is made of the base made of polyimide and the circuit pattern formed thereon, the chemical resistance and insulation are poor and sufficient durability can not be secured.

In particular, the polyimide has excellent tensile strength due to its characteristics, but it lacks elasticity to not sufficiently implement the vibration of the voice coil, and there is a problem that the polyimide is cut off during long-term use.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and more particularly, to provide a damper having excellent elasticity and tensile force, which can effectively realize vibration width and elastic sound quality of a speaker, And to provide a speaker.

According to an aspect of the present invention, there is provided a speaker damper inserted in a frame and attached to a voice coil to maintain vibration,

A coupling part coupled to the frame and supported by the frame;

An adhesive attached to the voice coil to support the voice coil; And

And a connection portion connecting the coupling portion and the bonding portion to each other,

The bonding portion, the bonding portion,

An epoxy plate made of an epoxy material excellent in elasticity; And

A reinforcing plate made of a material selected from polyimide or aramid fibers having excellent tensile strength and disposed on at least one of the upper and lower surfaces of the epoxy plate.

In the speaker damper,

The thickness of the epoxy plate may be greater than the thickness of the reinforcing plate.

In the speaker damper,

The epoxy plate and the reinforcing plate may be bonded by press-pressure bonding at a high temperature after applying the liquid adhesive.

In the speaker damper,

A copper plate made of copper may further be formed between the epoxy plate and the reinforcing plate.

In the speaker damper,

A reinforcing plate made of a polyimide material is formed on the upper surface of the epoxy plate, and a reinforcing plate made of an aramid fiber material is formed on the lower surface of the epoxy plate.

In the speaker damper,

The connecting portion, the adhesive portion, and the connecting portion are on the same plane, and have a flat plate shape having the same thickness, and the connecting portion may have a curved shape.

According to an aspect of the present invention, there is provided a speaker damper inserted in a frame and attached to a voice coil to maintain vibration,

A coupling part coupled to the frame and supported by the frame;

An adhesive attached to the voice coil to support the voice coil; And

And a connection portion connecting the coupling portion and the bonding portion to each other,

The bonding portion, the bonding portion,

An epoxy plate made of an epoxy material excellent in elasticity; And

A reinforcing plate formed of at least one of an upper surface and a lower surface of the epoxy plate and made of a synthetic resin material having a tensile strength higher than that of the epoxy plate may be laminated.

The slim type speaker for achieving the above-mentioned object includes the above-mentioned damper.

The present invention is advantageous in that an epoxy plate made of an epoxy material and a damper in which a reinforcing plate made of polyimide or aramid fiber are laminated are used to provide excellent elasticity and tensile force to compensate for vibration width and elastic sound quality of a speaker .

1 is a perspective view showing a slim type speaker according to an embodiment of the present invention;
2 is a plan view of a damper which is one configuration of Fig.
3 is a perspective view showing a slim type speaker according to another embodiment of the present invention.
4 is a plan view of a damper which is one configuration of Fig. 3;
FIGS. 5 to 9 are views showing various aspects of the damper of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a slim type speaker of the present invention and a damper used in the slim type speaker will be described in detail with reference to the accompanying drawings.

1 and 2, the slim type speaker 10 according to the embodiment of the present invention includes a frame 20, a yoke 30, a magnet 40, a plate 50, a voice coil 60, And includes a diaphragm 70 and a damper 80.

The frame 20 constitutes an entire body, and is formed in a substantially square frame shape. The frame 20 is configured to be able to receive or receive the yoke 30, the magnet 40, the plate 50, the voice coil 60, the diaphragm 70, and the damper 80 therein.

The yoke 30 includes a lower plate 31 disposed below the magnet 40 and a protrusion 32 protruding upward from the center of the lower plate 31 and inserted into the central hole 41 formed in the magnet 40 And the yoke 30 is made of a metal material having a low iron loss and a high magnetic flux density. The projecting portion 32 of the yoke 30 is inserted into the central hole 41 of the magnet 40 to form a magnetic flux flow passage.

The magnet 40 is formed in the shape of a ring having a center hole 41 at its center, and the protrusion 32 is inserted into the central hole 41.

The plate 50 is stacked on the magnet 40 and forms a magnetic gap with the protrusion 32 of the lower yoke 30. This plate 50 is entirely in the form of a ring.

The voice coil 60 is wound in a coil shape on a cylindrical bobbin. The voice coil 60 is connected to a predetermined outsider (not shown) to receive an external signal. When a predetermined signal is applied to the voice coil 60, the electromagnetic force generated in the voice coil 60 is transmitted to the voice coil 60 due to the interaction between the magnetic force formed on the yoke 30, the magnet 40 and the plate 50 Vibration.

The diaphragm 70 is disposed on the upper side of the voice coil 60 and vibrates together with the voice coil 60 to generate a sound wave.

The damper 80 is formed so as to have elasticity so as to vibrate, and performs the function of supporting the voice coil 60. The damper 80 includes a coupling portion 80a coupled to the frame 20 and supported by the frame 20; An adhesive portion 80b attached to the voice coil to support the voice coil; And a connecting portion 80c connecting the joining portion 80a and the joining portion 80b to each other.

At this time, each of the engaging portions 80a, the adhesive portions 80b, and the connecting portions 80c are present on the same plane and have the same thickness and are formed as a whole plate.

The joining portion 80a has a substantially rectangular frame shape and the joining portion 80b has a circular ring shape and the joining portion 80c has a curved shape in which the joining portion 80a and the joining portion 80b are formed. Respectively. Specifically, the connecting portion 80c extends from each of the slopes of the bonding portion 80b and is configured to have various curved shapes and to be connected to the inner surface of the coupling portion 80a to have elasticity.

As the damper 80 is formed in the same flat spring shape, there is an advantage that the same maximum amplitude can be achieved in all directions from front to back, right and left.

3 and 4, the slim type speaker 10 'according to another embodiment of the present invention includes a frame 20', a yoke 30 ', a magnet 40', a plate 50 ' Coil 60 ', diaphragm 70' and damper 80 '.

In the slim type speaker 10 'shown in FIGS. 3 and 4, diaphragm edge 71' is further provided in the periphery of the diaphragm 70 ', unlike the slim type speaker 10 of FIGS. Specifically, a diaphragm edge 71 'for coupling the diaphragm 70' to the frame 20 'around the diaphragm 70' is further provided.

The shape of the damper 80 'is also such that the coupling portion 80a' and the bonding portion 80b 'are respectively circular and the coupling portion 80c' extends from the bonding portion 80b ' As shown in FIG.

The speaker damper 80 according to the present invention may be composed of an epoxy plate 81, a copper plate 82 and a reinforcing plate 831 as shown in FIG.

The epoxy plate 81 is made of epoxy. The characteristics of the epoxy plate 81 made of epoxy will be briefly described below.

Epoxy refers to a polymer compound containing two or more epoxy groups in a molecule and a synthetic resin produced by a ring opening reaction of the epoxy group. A reaction product of mainly epichlorohydrin and a polyhydric phenol is used. These epoxies are made in two steps.

1) Preparation of bis-epoxy compound: Polyhydric phenol and epichlorohydrin are reacted in the presence of alkali hydroxide. In the case of dihydric phenols, the following condensates are produced. From the liquid phase having low viscosity to the solid having high melting point, various properties can be obtained depending on the mixing ratio of raw materials and reaction conditions. What is practically used is in the range of n = 0 to 12. As 2-valent phenol, 2, 2-bis (4'-hydroxyphenyl) propane (abbreviated to phenol A) is most widely used. In addition, phenol and formaldehyde early condensation (Resol) is sometimes used.

2) Curing reaction: When a compound having at least two epoxy groups as described above is reacted with a bifunctional (bifunctional) compound easily reactive with an epoxy group or a hydroxyl group, the ring of the epoxy group is opened and a reaction with the hydroxyl group occurs, It becomes a three-dimensional structure and becomes insoluble and infusible resin. Amines, organic acids and acid anhydrides are generally used as the soaping agent, and phenol resin, urea resin, polyamide resin and the like are also used.

These epoxy properties are as follows: 1) there is no generation of volatile substances at the time of curing, the volume reduction is very small (0.5 to 2.3%), 2) strong adhesion to the surface of the material in contact with the material during curing, It exhibits strong adhesion to the surface, has excellent mechanical properties, has high resistance to chemicals, and has good electrical insulation.

As described above, the epoxy plate 81 is made of an epoxy resin having the above-described characteristics. The epoxy plate 81 is formed in the form of a thin plate and is preferably formed to have a thickness of 4 to 10 times the thickness of the copper plate 82 and the reinforcing plate.

Since the epoxy plate 81 is formed to have such a thickness, it is made to have a size suitable for the slim speaker 10 (1), sufficient elasticity can be exhibited, and the speaker damper 80 exhibits excellent elastic function .

The copper plate 82 is formed on the upper and lower surfaces of the epoxy plate 81, and is made of copper. The copper plate 82 is formed thinner than the epoxy plate 81 and can be manufactured by forming a plating film on the epoxy substrate. The copper plate 82 is used not only to compensate the tensile force of the epoxy plate 81 but also to have a good thermal conductivity and to dissipate heat due to VC overheating.

The reinforcing plate 831 is made of a polyimide material. Polyimide is a general term for a polymer having an acid imide structure. It is usually referred to as an aromatic imide system, but may include an aliphatic maleimide system or the like. Generally, condensation is made between an aromatic tetracarboxylic acid anhydride and an aromatic diamine. Heat resistance is very high. There is also a thermosetting resin for a composite material which undergoes thermal crosslinking by introducing a double bond and a triple bond at the terminal of the oligomer of the aromatic imide. The reinforcing plate 831 is used for reinforcing the tensile force of the epoxy plate 81. That is, when only epoxy is used, the elasticity is good, but the tensile force is insufficient and the damper 80 is severed in the vibration process. For this purpose, polyimide having excellent tensile strength is laminated on the epoxy plate 81, ) Is advantageous in strengthening its own tensile strength.

Since the epoxy plate 81 and the reinforcing plate 831 are used together to increase the tensile force of the reinforcing plate 831 while utilizing the elastic force of the epoxy plate 81, the damper 80, which has excellent overall elasticity and tensile force, . ≪ / RTI >

The reinforcing plate 831 may be adhered to the epoxy plate 81 by a high temperature adhesive agent. Specifically, a liquid adhesive is applied to the reinforcing plate 831 and is then bonded to each other by heat pressing by applying a press pressure. These reinforcing plates 831 are stacked on the upper and lower sides of the epoxy plate 81.

The speaker damper 80 according to the present invention can be modified as follows.

In Fig. 6, unlike Fig. 5, it is illustrated that the reinforcing plate 832 disposed on the lower side of the epoxy plate 81 is made of aramid fibers.

A reinforcing plate 831 made of a polyimide material is disposed on the upper side copper plate 82 and a reinforcing plate 831 made of polyimide is disposed on the lower side copper plate 82. [ A reinforcing plate 832 made of fibers is arranged and stacked.

The aramid fiber forms a polymer polyamide by bonding an amide bond - CONH to an aromatic ring such as a benzene ring. It has excellent tensile strength, toughness and heat resistance, and has high strength and high elasticity. It is a thin thread with a thickness of about 5mm, but it has enough strength to lift a 2t car. It does not burn or dissolve, and it has a property of carbonizing (charring) only when it exceeds 500 ℃.

As the aramid fiber is used as a reinforcing material, the tensile force of the epoxy plate 81 is reinforced, which makes it possible to compensate for the drawback that the damper 80 is vulnerable to the tensile force as a whole.

7, a copper plate 82 and a reinforcing plate 831 made of a polyimide material are sequentially layered on the upper surface of the epoxy plate 81. A reinforcing plate 831 made of a polyimide material is formed on the lower surface of the epoxy plate 81, Fig.

8, a reinforcing plate 831 made of a polyimide material is stacked on the upper surface of an epoxy plate 81 and a reinforcing plate 832 made of aramid fibers is stacked on the lower surface of the epoxy plate 81 FIG.

9 shows a damper 80 in which a copper plate 82 and a reinforcing plate 831 made of polyimide are stacked on the upper surface of an epoxy plate 81. As shown in Fig.

The damper 80 of the present invention is not limited to the above-described embodiment, but may include a laminated structure of a reinforcing plate made of a synthetic resin material having a tensile strength higher than that of the epoxy plate on the upper or lower side of the epoxy plate. Of course.

As described above, according to the speaker damper 80 of the present invention, when the damper 80 of the speaker 10 is formed, an epoxy plate having excellent elasticity and a reinforcing plate 831 having excellent tensile strength are used together This is advantageous in that the vibration width and elastic sound quality of the speaker 10 can be supplemented. In particular, even when the epoxy resin is used for a long period of time, the problem that the damper 80 is cut off due to insufficient tensile force is solved.

While the present invention has been described with reference to the particular embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

10 ... speaker 20 ... frame
30 ... yoke 31 ... bottom plate
32 ... protrusion 33 ... center hole
40 ... Magnet 50 ... Plate
60 ... voice coil 70 ... diaphragm
80 ... damper 80a ... engaging portion
80b ... Adhesive portion 80c ... Connection
81 ... Epoxy plate 82 ... Copper plate
831, 832 ... reinforced plate

Claims (8)

A damper for a speaker inserted in a frame and attached to a voice coil to maintain vibration,
A coupling part coupled to the frame and supported by the frame;
An adhesive attached to the voice coil to support the voice coil; And
And a connection portion connecting the coupling portion and the bonding portion to each other,
The bonding portion, the bonding portion,
An epoxy plate made of an epoxy material and in the form of a plate; And
A reinforcement plate made of a material selected from polyimide or aramid fibers arranged on at least one of the upper and lower surfaces of the epoxy plate and having a tensile strength higher than that of the epoxy plate,
The epoxy plate and the reinforcing plate are laminated to constitute a laminated plate,
Wherein the thickness of the epoxy plate is greater than the thickness of the reinforcing plate. delete The method according to claim 1,
Wherein the epoxy plate and the reinforcing plate are bonded by press-pressure bonding at a high temperature after applying the liquid adhesive. The method according to claim 1,
And a copper plate made of copper is further formed between the epoxy plate and the reinforcing plate. The method according to claim 1,
Wherein a reinforcing plate made of a polyimide material is formed on an upper surface of the epoxy plate and a reinforcing plate made of an aramid fiber material is formed on a lower surface of the epoxy plate. The method according to claim 1,
Wherein the connecting portion, the adhesive portion, and the connecting portion are on the same plane and have a flat plate shape having the same thickness, and the connecting portion has a curved shape. A damper for a speaker inserted in a frame and attached to a voice coil to maintain vibration,
A coupling part coupled to the frame and supported by the frame;
An adhesive attached to the voice coil to support the voice coil; And
And a connection portion connecting the coupling portion and the bonding portion to each other,
The bonding portion, the bonding portion,
An epoxy plate made of an epoxy material and in the form of a plate; And
A reinforcing plate of a plate-like synthetic resin material having a tensile strength higher than that of the epoxy plate and being laminated on at least one of the upper and lower surfaces of the epoxy plate,
The epoxy plate and the reinforcing plate are laminated to constitute a laminated plate,
Wherein the thickness of the epoxy plate is greater than the thickness of the reinforcing plate. A slim type speaker comprising the damper for a speaker according to any one of claims 1 to 7.

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