KR102130920B1 - Transducer - Google Patents

Abstract

Various embodiments of the present invention relate to a vibrator. According to various embodiments of the present invention, the vibrator includes: a housing; a vibration plate positioned inside the housing; a first magnet attached to the center of the upper surface of the vibration plate; a second magnet facing the first magnet and attached to the center of the lower surface of the vibration plate; and a first coil located inside the housing, disposed opposite to the first magnet, and generating a magnetic field when power is applied. The first coil, the first magnet, the vibration plate, and the second magnet are sequentially aligned along a vertical direction, and the first magnet and the second magnet may move up and down along the vertical direction by magnetic field. Other embodiments may be possible.

Description

Oscillator {TRANSDUCER}

The present invention relates to a vibrator, and more particularly, to a vibrator capable of improving the efficiency and vibration strength of vertical vibration by applying a structure that minimizes vibration in a direction different from the vertical direction.

Generally, an earphone is a structure in which an electric input signal is applied to an acoustic coil to vibrate the diaphragm or air to hear sound. Among them, the element that generates sound by vibrating the diaphragm in the earphone is a vibrator.

The vibrator includes a housing, a diaphragm formed in a spring form attached to the inside of the housing, a magnet attached to the diaphragm, and a coil surrounding the magnet, and the magnet is vertically affected by the magnetic field generated according to the alternating current applied to the coil. It is a device that generates mechanical sound while simultaneously generating mechanical vibrations as the magnet moves vertically by using the principle of motion. Such a vibrator can generate stable vibrations and sound waves as the magnet minimizes movement in a direction other than the vertical direction (for example, left and right direction) (eg twist, residual vibration) and increases the ratio of vertical motion to the maximum.

However, in order to maximize the vertical motion of the vibrator, it was difficult to consider various factors such as the structure of the diaphragm, assembly tolerances between components, and removal of left and right vibrations by magnetic force lines generated in the coil.

In addition, as the existing vibrator is biased only in the area where the magnet is attached to the center of gravity of the diaphragm, deviation occurs when vibration occurs, which destabilizes the vertical movement of the magnet and inhibits the vertical movement (eg, left and right directions). There was a problem generating vibration. Specifically, the existing vibrator was easy to generate vibration in a direction other than vertical because the center of gravity of the diaphragm is located on the upper portion of the diaphragm.

KR 10-2019-0060625

The present invention has been devised to solve the above problems, and an object thereof is to provide a vibrator capable of effectively generating vertical vibration while suppressing vibration in different directions when vibrating a diaphragm caused by a magnet and a coil.

According to various embodiments of the present invention, the vibrator includes a housing; A diaphragm located inside the housing; A first magnet attached to the center of the upper surface of the diaphragm; A second magnet facing the first magnet and attached to the center of the lower surface of the diaphragm; Included in the housing, the first magnet is disposed opposite to the first magnet and generates a magnetic field when power is applied; including, the first coil, the first magnet, the diaphragm and the second magnet in a vertical direction It is sequentially arranged, and the first magnet and the second magnet may be moved up and down along the vertical direction by the magnetic field.

According to various embodiments of the present invention, the vibrator includes a housing; A diaphragm located inside the housing; A first magnet attached to the center of the upper surface of the diaphragm; A metal member facing the first magnet and attached to the center of the lower surface of the diaphragm; Included in the housing, the first magnet is disposed opposite the first magnet and generates a magnetic field when power is applied; including, the first coil, the first magnet, the diaphragm and the metal member along a vertical direction Aligned sequentially, the first magnet may be moved up and down along the vertical direction by the magnetic field.

According to various embodiments of the present invention, the vibrator includes a housing; A diaphragm located inside the housing and having a hole in the center; A magnet attached to the diaphragm to penetrate through the hole and to be located at the center of the diaphragm; It is located inside the housing and is disposed opposite to the magnet and generates a magnetic field when power is applied. Including, The first coil, the magnet and the diaphragm are sequentially aligned in a vertical direction, the magnetic field The magnet can be moved up and down along the vertical direction.

According to the present invention as described above, it has various effects as follows.

The present invention can effectively generate the vertical vibration of the diaphragm caused by the magnet and the coil.

The present invention can suppress the vibration of the diaphragm in a direction different from the vertical direction by using the coupling structure of the magnet and the diaphragm and the arrangement structure between the coil and the magnet.

The present invention attaches a member (ex magnet, metal, etc.) corresponding to the magnet located on the upper portion of the diaphragm to the lower portion of the diaphragm, so that the center of gravity of the diaphragm is located at the center of the diaphragm rather than at the top of the diaphragm, and different from the vertical Vibration in the direction can be suppressed. That is, unnecessary movement can be suppressed by positioning the center of gravity more downward.

1 is a fragmentary perspective view showing a vibrator according to an embodiment of the present invention.
2 is a cross-sectional view showing the vibrator of FIG. 1.
3 is a perspective view showing the diaphragm of FIG. 1.
4 is a cross-sectional view showing an oscillator according to an embodiment of the present invention.
5 is a cross-sectional view showing an oscillator according to an embodiment of the present invention.
6 is a perspective view showing the diaphragm of FIG. 5.
7 is a cross-sectional view showing an oscillator according to an embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings. And, in the description of the embodiment of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of the functions of the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition should be made based on the contents throughout this specification.

The preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete and the scope of the invention to those skilled in the art. It is provided to inform you.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings commonly understood by those skilled in the art to which the present invention pertains. In addition, terms defined in the commonly used dictionary are not ideally or excessively interpreted unless specifically defined.

The terminology used herein is for describing the embodiments and is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other components other than the components mentioned.

1 is a fragmentary perspective view showing a vibrator according to an embodiment of the present invention. 2 is a cross-sectional view showing the vibrator of FIG. 1. 3 is a perspective view showing the diaphragm of FIG. 1.

1 to 3, the vibrator 100 according to an embodiment of the present invention can move the magnet up and down by a magnetic field generated through a current flowing through the coil, and the diaphragm is vertically moved according to the vertical movement of the magnet. It can vibrate, and can vertically vibrate the entire housing 10, 20, 80 according to the vertical vibration of the diaphragm 50. That is, the vibrator 100 may generate sound waves by moving the entire housings 10, 20, and 80 using the coil, magnet, and vibration plate 50.

In one embodiment, the vibrator 100 is attached so that the magnet is firmly fixed to the central portion of the center of gravity of the diaphragm 50, so that the movement of the diaphragm 50 and the housing 10, 20, 80 in the left and right directions (or left and right) Movement), and by installing coils that generate magnetic fields in the upper and lower vertical directions of the magnet, the movement in the left and right directions of the diaphragm 50 and the housings 10, 20, and 80 can be further reduced, The decrease in the movement in the left and right direction may lead to an increase in the movement in the vertical direction. Hereinafter, the structure and operation of the vibrator 100 will be described in more detail.

In one embodiment, the vibrator 100 includes a housing 10, 20, 80, a first coil 30, a first magnet 40, a diaphragm 50, a second magnet 60, a second coil 70 ). Among the components of the vibrator 100, the first coil 30, the first magnet 40, the diaphragm 50, the second magnet 60, and the second coil 70 may be disposed perpendicular to each other. That is, the first coil 30, the first magnet 40, the diaphragm 50, the second magnet 60, and the second coil 70 may be sequentially arranged along the vertical direction. This structure is to generate the vertical vibration of the vibrator 100 more effectively. Therefore, preferably, the centers of gravity of the first coil 30, the first magnet 40, the diaphragm 50, the second magnet 60, and the second coil 70 may be vertically arranged with each other.

In one embodiment, the magnet and the coil may be disposed spaced apart at an appropriate distance so that the magnetic field generated by the coil is transmitted to the magnet.

In one embodiment, the housing (10, 20, 80, hereinafter omitted) may be a receiving member having an internal space, the upper and lower base member 20 and the upper portion of the base member 20 is sealed The upper plate 10 and the lower plate 80 to seal the lower portion of the base member 20 may be included. The housing may be attached inside the earphone that can generate sound waves using vibration. Although the shape of the housing in FIGS. 1 and 2 is shown as a cylindrical shape, this is an example and may have a column shape of various shapes extending in the vertical direction in the longitudinal direction.

In one embodiment, the diameter of the housing may be 7 mm or less and the height may be 5 mm or less. For example, the vibrator 100 may be an internal component of an audio output device such as an earphone, and is preferably manufactured in a small size because the vibration must be transmitted to the outside by coupling between other external components.

In one embodiment, the housing may be processed from a metal plate having good elasticity to easily transmit vibrations caused by the magnet and the coil to the outside. For example, when the vibrator 100 is applied to an earphone, the housing may have an elastic force so that vibration that is acoustically converted to the case or the internal configuration of the earphone is effectively transmitted.

In one embodiment, the base member 20 of the housing may provide a space for the first magnet 40 and the second magnet 60 to move up and down. The top plate 10 and the bottom plate 80 may be attached to the base member 20 using a bonding material or the like to seal the housing.

In one embodiment, the diaphragm 50 is located in the inner space of the housing and may be an elastic means to which the first magnet 40 and the second magnet 60 are attached. For example, the diaphragm 50 may be a plate spring as shown in FIG. 2, but is not limited thereto, and may be changed to a configuration having elastic force to generate vibration according to the vertical movement of the magnet.

In one embodiment, the diaphragm 50, as shown in Figure 3, a fixed ring 53 fixed to the inner surface of the housing, one end is connected to the fixed ring 53, and bent in the spiral direction to generate elastic force It is composed of a plurality of connecting portions 52 and each other end of the connecting portion 52, the first magnet 40 and the second magnet 60 is composed of a central portion 51 is disposed. Here, the plurality of connecting portions 52 may be elastic members having elastic force. Under this structure, the diaphragm 50 may have a plurality of incisions.

In one embodiment, the diaphragm 50 may be coupled to the base member 20 of the housing by at least one of bonding, pressing and welding.

In one embodiment, the diaphragm 50 may be integrally formed with the base member 20 of the housing. Therefore, the vertical vibration of the diaphragm 50 can be transmitted to the housing more effectively.

In one embodiment, the first magnet 40 may be attached to the center of the upper surface of the diaphragm 50, the second magnet 60 is opposed to the first magnet 40 and the center of the lower surface of the diaphragm 50 Can be attached to.

In one embodiment, the first magnet 40 and the second magnet 60 may be permanent magnets disposed on the diaphragm 50 in the vertical direction (longitudinal direction) of the housing. For example, the first magnet 40 and the second magnet 60 may have different polarities, and the first magnet 40 and the second magnet 60 of the diaphragm 50 may be driven by a pulling force. It can be firmly attached to the center. In addition, since the center of gravity of the structure in which the first magnet 40 and the second magnet 60 are coupled via the diaphragm 50 is identical to the center of gravity of the diaphragm 50, movement in the left and right directions of the diaphragm 50 is achieved. Minimized and vertical movement can be increased.

That is, when only the first magnet 40 was previously disposed on the diaphragm 50, the center of gravity was located above the diaphragm 50, but the weight was obtained by attaching the second magnet 60 to the center lower surface of the diaphragm 50. The center can be located in the center of the diaphragm 50.

In one embodiment, the first magnet 40 and the second magnet 60 may be moved up and down in the vertical direction according to a change in a magnetic field according to a change in current applied to the coil. Here, vertical movement may have the same meaning as vertical vibration. In addition, as the first magnet 40 and the second magnet 60 move up and down along the vertical direction, the vibration plate 50 and the housing may be vertically vibrated.

In one embodiment, the first magnet 40 and the second magnet 60 may have smaller outer diameters than the first coil 30 and the second coil 70.

In one embodiment, the first coil 30 is located inside the housing and is disposed opposite the first magnet 40 and may generate a magnetic field when power is applied. The second coil 70 is located inside the housing and is disposed opposite the second magnet 60 and may generate a magnetic field when power is applied. The first coil 30 is located at the center of the inner circumferential surface of the top plate 10 that seals the open top of the housing, and the second coil 70 is located at the center of the inner circumferential surface of the bottom plate 80 that seals the open bottom of the housing. can do.

For example, since the first coil 30 and the second coil 70 simultaneously generate magnetic force lines on both the upper and lower sides of the first magnet 40 and the second magnet 60, the first magnet 40 and the second magnet Movement in the left and right directions of the diaphragm 50 to which the 60 is attached can be minimized and movement in the vertical direction can be increased. That is, by arranging the first coil 30 and the second coil 70 on both sides of the upper and lower sides, it is possible to prevent uneven vibration biased to either side and to improve the magnetic flux density of the magnetic field.

In one embodiment, the first coil 30 and the second coil 70 may have an outer diameter having a size larger than the outer diameters of the first magnet 40 and the second magnet 60. In this case, a region in which the magnetic fields generated by the first coil 30 and the second coil 70 cross each other may be increased, and the first magnet 40 and the second magnet 60 may move upward and downward. It can grow and vibrate more strongly.

In one embodiment, a circuit unit (not shown) for applying external power to the first coil 30 and the second coil 70 may be disposed inside the housing. For example, when the circuit unit applies power to the first coil 30 and the second coil 70, the first magnet (by the current flowing in one direction through the first coil 30 and the second coil 70) 40) and the magnetic field may be generated in the direction in which the second magnet 60 is disposed (magnetic flux is formed).

As described above, the vibrator 100 may have two coils and two magnets, thereby increasing the efficiency and vibration intensity of vertical vibration.

In one embodiment, the vibrator 100 may be an optimized vibration element applied to the earphone, and may output sound waves due to vibration generated by the vibrator 100 through other components of the earphone to the outside. That is, the vibrator 100 of the present invention can effectively prevent vibration from being deteriorated or distorted due to vibration damping due to other internal components of the earphone by effectively transmitting vibration and sound waves along the vertical direction.

In addition, in one embodiment, the vibrator 100 may be an optimized vibration element applied to the bone conduction output device. The bone conduction output device is a device that can contact the wearer's body, and aims to improve the bone conduction rate by transmitting the vibration force without loss to the wearer's body to which the bone conduction output is transmitted. Accordingly, a vibration element capable of effectively transmitting vibration and sound waves according to the improved vertical vibration, such as the vibrator 100 of the present invention, may be a vibration element optimized for a bone conduction output device. That is, the oscillator 100 of the present invention can effectively prevent vibration and deterioration of bone conduction due to vibration damping due to other internal components of the bone conduction output device by effectively transmitting vibration and sound waves along a vertical direction.

4 is a cross-sectional view showing an oscillator according to an embodiment of the present invention. Descriptions identical to those of the oscillator disclosed in FIGS. 1 to 3 and overlapping descriptions are omitted.

Referring to FIG. 4, in one embodiment, the vibrator 100 includes a housing 10, 20, 80, a first coil 30, a first magnet 40, a diaphragm 50, a metal member 41, and It may include a second coil (70).

In one embodiment, the metal member 41 faces the first magnet 40 and may be attached to the center of the lower surface of the diaphragm 50. As the metal member 41 is disposed under the first magnet 40, the first magnet 40 can move only in the vertical direction without being biased in any one direction. That is, the metal member 41 may transmit gravity to the first magnet 40 and the diaphragm 50 so that the center of gravity of the first magnet 40 and the diaphragm 50 is well held, which is the first magnet 40 ) Can induce stable vertical movement.

When the metal member 41 is attached to the lower surface of the diaphragm 50, the center of gravity where the first magnet 40, the metal member 41, and the diaphragm 50 are coupled is near the center of the diaphragm 50. Will be able to locate.

5 is a cross-sectional view showing an oscillator according to an embodiment of the present invention. 6 is a perspective view showing the diaphragm of FIG. 5. Descriptions identical to those of the oscillator disclosed in FIGS. 1 to 3 and overlapping descriptions are omitted.

5 and 6, in one embodiment, the vibrator 100 includes a housing 10, 20, 80, a first coil 30, a magnet 40, a diaphragm 50, and a second coil 70 ).

In one embodiment, the diaphragm 50 may include a fixing ring 57, a connecting portion 56 and a central portion extending from the fixing ring 57, and a hole 55 in the central portion. The magnet 40 may be attached to the diaphragm 50 so as to be located in the center of the diaphragm 50 through the hole of the diaphragm 50. Here, the size of the magnet 40 may be larger than the size of the first magnet 40 or the second magnet 60 of FIG. 1.

As described above, when the magnet 40 is disposed on the diaphragm 50, the magnet 40 can be stably moved up and down by using the coupling structure of the magnet 40 and the diaphragm 50 rather than the coupling force between the magnets. In addition, vibration caused by the vertical movement of the magnet 40 can be more stably transmitted to the diaphragm 50.

7 is a cross-sectional view showing an oscillator according to an embodiment of the present invention. Descriptions identical to those of the oscillator disclosed in FIGS. 1 to 3 and overlapping descriptions are omitted.

Referring to FIG. 7, in one embodiment, the vibrator 100 includes a housing 10, 20, 80, a first coil 30, a first magnet 40, a diaphragm 50, and a second magnet 60 It may include. Unlike the FIG. 1, the embodiment illustrated in FIG. 7 is a structure in which the second coil 70 is removed. That is, according to the present invention, as the center of gravity of the first magnet 40, the diaphragm 50, and the second magnet 60 is stably secured, only one coil can generate sufficient vertical vibration.

According to various embodiments of the present invention, the vibrator includes a housing; A diaphragm located inside the housing; A first magnet attached to the center of the upper surface of the diaphragm; A second magnet facing the first magnet and attached to the center of the lower surface of the diaphragm; Included in the housing, the first magnet is disposed opposite to the first magnet and generates a magnetic field when power is applied; including, the first coil, the first magnet, the diaphragm and the second magnet in a vertical direction It is sequentially arranged, and the first magnet and the second magnet may be moved up and down along the vertical direction by the magnetic field.

According to various embodiments, the vibration plate and the housing may be vertically vibrated as the first magnet and the second magnet move up and down along the vertical direction.

According to various embodiments of the present disclosure, a second coil positioned inside the housing and disposed opposite the second magnet and generating a magnetic field when power is applied, includes the first coil, the first magnet, the diaphragm, and the first The two magnets and the second coil may be aligned sequentially along the vertical direction.

According to various embodiments, the first coil may be located at the center of the inner circumferential surface of the upper plate sealing the opened upper portion of the housing, and the second coil may be located at the center of the inner circumferential surface of the lower plate sealing the opened lower portion of the housing. have.

According to various embodiments, the first magnet and the second magnet may have different polarities.

According to various embodiments, the centers of gravity of the first magnet, the diaphragm, and the second magnet 60 may be disposed perpendicular to each other.

According to various embodiments of the present invention, the vibrator includes a housing; A diaphragm located inside the housing; A first magnet attached to the center of the upper surface of the diaphragm; A metal member facing the first magnet and attached to the center of the lower surface of the diaphragm; Included in the housing, the first magnet is disposed opposite the first magnet and generates a magnetic field when power is applied; including, the first coil, the first magnet, the diaphragm and the metal member along a vertical direction Aligned sequentially, the first magnet may be moved up and down along the vertical direction by the magnetic field.

According to various embodiments of the present disclosure, a second coil positioned inside the housing and disposed opposite to the metal member and generating a magnetic field when power is applied is further included.

The first coil, the first magnet, the diaphragm, the metal member, and the second coil may be sequentially arranged along the vertical direction.

According to various embodiments of the present invention, the vibrator includes a housing; A diaphragm located inside the housing and having a hole in the center; A magnet attached to the diaphragm to penetrate through the hole and to be located at the center of the diaphragm; It is located inside the housing and is disposed opposite to the magnet and generates a magnetic field when power is applied. Including, The first coil, the magnet and the diaphragm are sequentially aligned in a vertical direction, the magnetic field The magnet can be moved up and down along the vertical direction.

According to various embodiments of the present disclosure, a second coil positioned inside the housing and disposed opposite the magnet and generating a magnetic field when power is applied,

The first coil, the magnet, the diaphragm, and the second coil may be sequentially arranged along the vertical direction.

In the above, the present invention has been described by specific matters such as specific components and limited embodiments and drawings, but this is provided only to help a more comprehensive understanding of the present invention, and the present invention is limited to the above embodiments No, those skilled in the art to which the present invention pertains may seek various modifications and variations from these descriptions.

Therefore, the spirit of the present invention is not limited to the above-described embodiments, and should not be determined, and all claims that are equally or equivalently modified with the claims as described below belong to the scope of the spirit of the present invention. will be.

100: vibrator 10: top plate
20: base member 30: first coil
40: first magnet 50: diaphragm
60: second magnet 70: second coil
80: bottom plate

Claims (10)

housing;
A vibration plate located inside the housing, the fixing ring fixed to the inner surface of the housing, a plurality of connecting portions connected to one end of the fixing ring and curved in a spiral direction, and a central portion connected to each other end of the plurality of connecting portions;
A first magnet attached to an upper surface of the central portion of the diaphragm;
A second magnet facing the first magnet and attached to a lower surface of the central portion of the diaphragm;
A first coil located inside the housing and facing the first magnet and generating a magnetic field when power is applied; And
A second coil positioned inside the housing and facing the second magnet and generating a magnetic field when power is applied; Further comprising,
The first coil, the first magnet, the diaphragm, the second magnet and the second coil are sequentially arranged along a vertical direction,
The first magnet and the second magnet are moved up and down along the vertical direction by the magnetic field,
The vibration plate,
And a plurality of cutouts penetrating the upper surface and the lower surface of the diaphragm between the plurality of connecting portions and the central portion, and between the plurality of connecting portions and the fixing ring. The vibrator according to claim 1, wherein the vibration plate and the housing are vertically vibrated as the first magnet and the second magnet move up and down along the vertical direction. delete According to claim 1,
The first coil is located in the center of the inner circumferential surface of the top plate that seals the open top of the housing,
The second coil is located in the center of the inner circumferential surface of the lower plate sealing the open bottom of the housing. The vibrator of claim 1, wherein the first magnet and the second magnet have different polarities. The vibrator according to claim 5, wherein the centers of gravity of the first magnet, the diaphragm, and the second magnet are disposed perpendicular to each other. housing;
A vibration plate located inside the housing, the fixing ring fixed to the inner surface of the housing, a plurality of connecting portions connected to one end of the fixing ring and curved in a spiral direction, and a central portion connected to each other end of the plurality of connecting portions;
A first magnet attached to an upper surface of the central portion of the diaphragm;
A metal member facing the first magnet and attached to a lower surface of the central portion of the diaphragm; And
A first coil located inside the housing and facing the first magnet and generating a magnetic field when power is applied; And
It is located inside the housing and disposed opposite to the metal member and further includes a second coil that generates a magnetic field when power is applied.
The first coil, the first magnet, the diaphragm, the metal member and the second coil are sequentially arranged along a vertical direction,
The first magnet is moved up and down along the vertical direction by the magnetic field,
The vibration plate,
And a plurality of cutouts penetrating the upper surface and the lower surface of the diaphragm between the plurality of connecting portions and the central portion, and between the plurality of connecting portions and the fixing ring.
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