KR101972520B1 - Ultra-thin earphone speaker unit - Google Patents

Abstract

The present invention relates to an ultra-thin earphone speaker unit. A PCB of the speaker unit is formed to divide a volume chamber which is inserted into an insert groove formed at the center of an outer plate and controls the resonant frequency. The ultra-thin earphone speaker unit provides rich mid- and low-frequency sounds in 3t or less of an ultra-thin speaker structure and simply controls the air flow from the single yoke structure to the inside of the volume chamber by varying the size of an outer port by replacing the PCB, thereby facilitating the inventory management by ensuring the compatibility of components other than the PCB. To this end, the ultra-thin earphone speaker unit consists of a vibration plate (10), a voice coil (20), a magnet (30), a ring-shaped body (40), an inner plate (50), the outer plate (60), the insert groove (70) and the PCB (80).

Description

Ultra-thin earphone speaker unit {Ultra-thin earphone speaker unit}

The present invention relates to an ultra-thin earphone speaker unit, and more particularly, since the PCB board of the speaker unit is inserted into an insert groove formed in the center of the outer plate to form a volume compartment for controlling the resonance frequency, an ultra-thin speaker structure of 3t or less In addition to providing rich mid- and low-frequency sound at the same time, the external port size is changed by replacing the PCB board, so the resonance frequency is tuned in a single yoke structure, making it easy to manage inventory by ensuring the compatibility of components other than the PCB board. It is about a unit.

A speaker is an acoustic device that converts an electrical signal into vibration of a diaphragm to generate a small density wave in the air to radiate sound waves. A voice coil is installed, such as winding an enamel wire on the diaphragm. If the voice coil is placed near the permanent magnet and an electric signal with sound information flows through the coil, the voice coil is reciprocated with the diaphragm by the magnetic field and outputs sound. However, in recent years, the demand for micro-speakers is rapidly increasing due to the small size and light weight of audio equipment, but as the speaker size becomes smaller, it is difficult to meet the high performance.

Accordingly, in the presently disclosed Patent No. 2002-0024186, the receiving unit for a mobile communication terminal efficiently uses an annular magnet and a yoke having ventilation holes in the center upper and lower plates to increase the volume of the magnet and smooth the air flow, thereby providing high performance, In addition to providing a highly efficient thin receiving unit and eliminating the need for tools and tools for maintaining the concentricity of the conventional magnet and the frame, the manufacturing process is greatly simplified. Furthermore, the concentricity of the magnet and the frame is accurately maintained to improve sound quality and coil. The technology has been published to improve the sound quality by the heat is easily released into the vent holes of the yoke.

However, the prior art is a technology for providing a high performance, high efficiency thin receiving unit by smoothly flowing the air by using the yoke vents, or due to the structural characteristics such that the PCB to which the electrical signal lines are connected is exposed to the outside of the yoke. Limits followed.

In addition, since the volume chamber is constituted by the yoke, the yoke component itself needs to be replaced to change the mid and low frequency sounds caused by the air flow into the volume chamber. Not only should they be prepared by specification, but also lack of parts compatibility by specification led to difficulties in inventory management.

Accordingly, the present invention has been conceived to solve the above problems, and since the PCB board of the speaker unit is inserted into the insert groove formed in the center of the outer plate to form a volume compartment for controlling the resonance frequency, an ultra-thin speaker of 3t or less Ultra-thin earphones that provide rich mid- and low-range sound in the structure, and by changing the outer port size by replacing the PCB board, the resonance frequency is tuned in a single yoke structure, thereby ensuring inventory compatibility by ensuring the compatibility of components other than the PCB board. The object is to provide a speaker unit.

Features of the present invention to achieve this object, the diaphragm 10 is provided so that the edge portion is supported on the main frame 100; A voice coil 20 attached to the rear surface of the diaphragm 10 to generate a magnetic field by an electric signal; A magnet 30 provided inside the body frame 100 to react with the voice coil 20 magnetic field; An annular body 40 disposed to be spaced apart from the rear surface of the diaphragm 10 and having a hollow hole 42 formed in a center thereof; An inner plate 50 which closes the upper portion of the annular body 40 and has an inner port 52 formed at the center thereof; An outer plate 60 connected to the main body frame 100 to support a lower portion of the annular body 40; An insert groove 70 formed through the center of the outer plate 60 so as to have a size larger than an inner diameter of the annular body 40 and a stepped 72 formed by an end portion of the annular body 40; And a PCB substrate 80 inserted into the insert groove 70 and closing the lower portion of the annular body 40 to form the volume chamber 1, and having an outer port 82 at the center thereof. It is characterized by.

At this time, in the magnetic speaker structure in which the magnet 30 is located outside of the voice coil 20, the inner plate and the outer plate 50 and 60 are integrally connected to both sides of the annular body 40 so that a single yoke is provided. Characterized in that it is provided with (200).

In addition, the body frame 100 is formed of an injection molded object formed with a tube 110 and the bottom plate ring 120, the bottom plate ring 120 is formed with an installation hole 122 to insert the outer plate 60, The bottom plate ring 120 is integrally banded so that the bottom surface of the magnet 30 is supported at the end of the tube 110.

In addition, in the magnetic speaker structure in which the magnet 30 is located at the center of the voice coil 20, the magnet 30 also serves as the annular body 40, and the outer plate 60 has a voice coil at an edge portion thereof. An annular side wall 62 surrounding the outside 20 is integrally connected and is characterized in that it is provided as a single yoke 300.

In addition, the body frame 100 is composed of a tubular body 100 and the bottom plate ring 120, the bottom plate ring 120 is integrally connected to the upper portion of the annular side wall 62 of the yoke 300 is formed as a single part It is characterized by.

In addition, the body frame 100 is formed of an injection molded body formed of a tube 100 and the bottom plate ring 120, the mounting hole 122 is formed so that the outer plate 60 is inserted into the bottom plate ring 120, The bottom plate ring 120 is integrally bent to be formed so that the bottom surface of the outer plate 60 is supported at the end of the tubular body 110.

In addition, the mesh resistance plate 90 is provided in any one or more of the inner and outer ports 52, 82 to control the flow of air into the volume chamber (1).

According to the above-described configuration and operation, the present invention forms a volume compartment for inserting the PCB substrate of the speaker unit into the insert groove formed in the center of the outer plate to control the resonant frequency. In addition to providing sound, the resonant frequency is tuned in a single yoke structure by varying the outer port size by replacing the PCB board, thus facilitating inventory management by ensuring compatibility of components other than the PCB board.

1 to 2 is a block diagram showing the external speaker structure of the ultra-thin earphone speaker unit according to an embodiment of the present invention.
3 to 5 is a block diagram showing a magnetic speaker structure of the ultra-thin earphone speaker unit according to another embodiment of the present invention.
Figure 6 is a block diagram showing a state in which the mesh resistance plate is applied to the outer port of the ultra-thin earphone speaker unit according to another embodiment of the present invention.
Figure 7 is a block diagram showing a state in which a mesh resistance plate is applied to the inner port of the ultra-thin earphone speaker unit according to another embodiment of the present invention.
8 is a block diagram showing a state in which a mesh resistance plate is applied to the inner and outer ports of the ultra-thin earphone speaker unit according to another embodiment of the present invention.
9 is a resonance frequency measurement table according to the application, non-application and application position of the mesh resistance plate of the ultra-thin earphone speaker unit according to a modification of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to an ultra-thin earphone speaker unit, wherein the ultra-thin earphone speaker unit is inserted into the insert groove formed in the center of the outer plate of the speaker board is formed in the volume chamber compartment for controlling the resonance frequency, ultra-thin 3t or less The speaker structure provides rich mid- and low-range sound, and the external port size is changed by replacing the PCB board, so the air flow from the single yoke structure to the inside of the volume chamber is easily controlled. To facilitate inventory management, the diaphragm 10, the voice coil 20, the magnet 30, the annular body 40, the inner plate 50, the outer plate 60, the insert groove 70, and the PCB substrate ( It consists of major components, including 80).

Ultra-thin earphone speaker unit according to the present invention is the diaphragm 10 is provided so that the edge portion is supported on the main frame 100, the voice coil 20 is attached to the back of the diaphragm 10 to generate a magnetic field by an electrical signal and In addition, the voice coil 20 is configured to include a magnet 30 provided inside the body frame 100 to react with the magnetic field.

Then, the voice coil 20 is connected to the PCB substrate 80 to be described later, the PCB substrate 80 is a terminal is formed so that the earphone cable is connected, the voice by the electrical signal transmitted from the PCB substrate 80 The coil 20 forms a magnetic field. At this time, the variable magnetic field generated by the voice coil 20 reacts with the magnet 30 magnetic field to drive the diaphragm 10 to output sound.

In addition, the annular body 40 according to the present invention is spaced apart from the rear surface of the diaphragm 10, the hollow hole 42 is formed in the center. The annular body 40 is a structure which forms the annular side wall of the volume chamber 1 mentioned later, and is arrange | positioned so that the through-hole opening part may face the diaphragm 10 in the center. And when the annular body 40 is an external speaker structure as shown in Figs. 1 and 2, the inner and outer plates 50 and 60 are integrally connected to upper and lower portions to form a single yoke 200. In the case of the magneto-type speaker structure such as 3 to 5, it is formed to replace the annular magnet, the specific embodiment according to this will refer to the description of Figures 1 to 5 to be described later.

In addition, the inner plate 50 according to the present invention finishes the upper portion of the annular body 40, the inner port 52 is formed in the center. The inner plate 50 is positioned to be spaced apart from the rear surface of the diaphragm 10 while closing the upper end of the annular body 40 adjacent to the diaphragm 10. When the diaphragm 10 is driven, the inner port 52 controls the air flow and the diaphragm vibration in a section formed on the rear surface of the diaphragm 10. In this case, the inner port 52 has a high band and a low band. Band sound is output.

 In addition, the outer plate 60 according to the present invention is provided to support the lower portion of the annular body 40 is connected to the main frame 100. The outer plate 60 is configured to form a rear outer case of the speaker, and in the case of an external speaker structure as shown in FIGS. 1 and 2, the outer plate 60 is integrally connected to the lower portion of the annular body 40 and is formed as a single yoke 200. In the case of the inner speaker structure as shown in FIGS. 3 to 5, the annular body 40 and the yoke 200 are formed separately and are connected to and supported on the main body frame 100 while being finished on the bottom surface of the annular body 40. Detailed embodiments thereof will be described with reference to FIGS. 1 to 5 to be described later.

In addition, the insert groove 70 according to the present invention is penetrated through the center of the outer plate 60 is formed in an expanded size than the inner diameter of the annular body 40, the stepped 72 is formed by the end of the annular body 40. When the insert groove 70 has an external speaker structure as shown in FIGS. 1 and 2, a seed surface shape of the annular body 40 and the outer plate 60 is formed in a contact portion at a contact portion of the annular body 40 to be described later. The outer circumferential surface and two upper edges of the upper surface are supported simultaneously. Therefore, even when assembling by the unskilled hole PCB board 80 installation position is kept constant, thereby maintaining the volume 1 quality uniformly in the mass production line.

In addition, the PCB substrate 80 according to the present invention is inserted into the insert groove 70, and closes the lower portion of the annular body 40 to form the volume chamber 1, and the outer port 82 is provided at the center. do. PCB board 80 is an insulated board in which the + and-terminals are arranged so that the voice coil 20 and the earphone cable are connected to each other. This is an essential configuration, the present application applies to the yoke replacement configuration for the PCB substrate 80 to close the annular body 40 below.

1 to 5, the PCB substrate 80 is formed of a circular plate of the same size as the insert groove 70, and closes the rear compartment of the volume chamber 1 by a simple assembly method fitted to the insert groove 70. In addition, after the PCB substrate 80 is installed, it is positioned on the same plane as the bottom surface of the outer plate 60.

 As such, since the PCB substrate 80 is inserted into the insert groove 70 formed at the center of the outer plate 60 to form a volume chamber 1 for controlling the resonance frequency, the PCB substrate 80 is rich in an ultra-thin speaker structure of 3t or less. The low frequency sound is provided, and in particular, as the size of the outer port 82 is changed in such a manner as to replace the PCB board 80, the resonance frequency is easily tuned in a single yoke structure, and the PCB board 80 is excluded. It is easy to manage inventory by ensuring the compatibility of parts.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5.

1 and 2, in the magnetic speaker structure in which the magnet 30 is located outside the voice coil 20, the inner and outer plates 50 and 60 are integrally connected to both sides of the annular body 40. And is provided as a single yoke 200. The yoke is closed by one side of the inner plate 50 and the other side is opened so that the insert groove 70 is formed. The volume chamber 1 is formed by the PCB substrate 80 installed in the insert groove 70. As a result of this construction, the size of the outer port 82 is varied in a simple operation of replacing the PCB substrate 80, and the resonance frequency is tuned. In this case, the larger the aperture, the higher the band, and the lower the band, the lower the band.

And, the upper surface of the outer plate 60 is formed with a stepped jaw-shaped magnet 30 so as to support the seat, the outside of the magnet 30 is finished by the main body frame 100, where the main body frame 100 is a tubular body Consisting of the 110 and the bottom plate ring 120, the bottom plate ring 120, as shown in Figure 1 is formed of an injection molding is formed in the mounting hole 122 so that the outer plate 60 is inserted, or the tubular body 110 as shown in FIG. The bottom plate ring 120 is integrally banded to support the bottom surface of the magnet 30.

3 to 5, in the magnetic speaker structure in which the magnet 30 is located at the center of the voice coil 20, the annular body 40 is formed of a magnet 30, and the outer plate 60 is an edge. An annular side wall 62 that surrounds the voice coil 20 from the outside is integrally connected to the portion and provided as a single yoke 300. The magnet 30 is formed in an annular shape, one side is closed by the inner plate 50, and the other side is provided with an outer plate 60 is formed in the insert groove 70, is installed in the insert groove 70 The compartment 1 is formed by the PCB substrate 80. In addition, the resonant frequency is tuned by varying the size of the outer port 82 in a simple operation of replacing the PCB substrate 80. In this case, the larger the aperture, the higher the band, and the lower the band, the lower the band.

At this time, the body frame 100 is composed of a tubular body 100 and the bottom plate ring 120, the bottom plate ring 120 is integrally connected to the upper portion of the annular side wall 62 of the yoke 300 as shown in Figure 3 4 or a molded product in which an installation hole 122 is formed so that the outer plate 60 is inserted into the bottom plate ring 120 as shown in FIG. 4, or the bottom surface of the outer plate 60 at the end of the tubular body 110 as shown in FIG. 5. The bottom plate ring 120 is integrally bent to be supported so as to support the yoke 300.

6 is a block diagram showing a state in which a mesh resistance plate is applied to the outer port of the ultra-thin earphone speaker unit according to another embodiment of the present invention, Figure 7 is a mesh in the inner port of the ultra-thin earphone speaker unit according to another embodiment of the present invention 8 is a block diagram illustrating a state in which a resistance plate is applied, and FIG. 8 is a block diagram showing a state in which a mesh resistance plate is complexly applied to inner and outer ports of an ultra-thin earphone speaker unit according to another embodiment of the present invention, and FIG. Resonant frequency measurement table according to the modified, non-applied and application of the mesh resistance plate of the ultra-thin earphone speaker unit according to the modification.

The mesh resistance plate 90 is provided at any one or more of the inner and outer ports 52 and 82 to control the flow of air into the volume chamber 1, and FIG. 90 is provided at the outer port 82, and the air flow to the outside of the volume chamber 1 and the speaker is controlled, and FIG. 7 is provided with a mesh resistance plate 90 at the inner port 52. , And a state in which air flow between the rear partition of the diaphragm 10 and the volume chamber 1 is controlled, and FIG. 8 shows that the mesh resistance plate 90 is applied to both the inner and outer ports 52 and 82, thereby The air flow to the outside of the chamber 1 and the speaker and the air flow between the rear compartment of the diaphragm 10 and the volume chamber 1 are controlled in a complex manner.

And, Figure 9 is a table measuring the resonant frequency according to the application, non-application and application position of the mesh resistance plate 90, the blue line (B) is a condition that the mesh resistance plate 90 is not applied, green ( G) line is a condition that the mesh resistance plate 90 is applied to the outer port 82, purple (P) line is a resonance frequency under the condition that the mesh resistance plate 90 is applied to the inner port 52, The resonant frequency is changed in the order of blue line-> green line-> purple line.

Therefore, the resonance frequency is easily tuned according to the application, non-application and application position of the mesh resistance plate 90 in a single yoke structure, and in particular, it is easy to manage inventory by ensuring compatibility of all components except the mesh resistance plate 90. have.

10: diaphragm 20: coil
30: magnet 40: annulus
50: inner plate 60: outer plate
70: insert groove 80: PCB substrate
90: mesh resistance plate

Claims (7)

A diaphragm 10 provided to support the edge portion of the main body frame 100;
A voice coil 20 attached to the rear surface of the diaphragm 10 to generate a magnetic field by an electric signal;
A magnet 30 provided inside the body frame 100 to react with the voice coil 20 magnetic field;
An annular body 40 disposed to be spaced apart from the rear surface of the diaphragm 10 and having a hollow hole 42 formed in a center thereof;
An inner plate 50 which closes the upper portion of the annular body 40 and has an inner port 52 formed at the center thereof;
An outer plate 60 connected to the main body frame 100 to support a lower portion of the annular body 40;
An insert groove 70 formed through the center of the outer plate 60 so as to have a size larger than an inner diameter of the annular body 40 and a stepped 72 formed by an end portion of the annular body 40;
Inserted and installed in the insert groove 70, to close the lower portion of the annular body 40 to form a volume chamber (1), the center is provided with a PCB (80) having an outer port 82; ,
The magnet 30 is an external speaker structure located on the outside of the voice coil 20, the inner and outer plates (50, 60) are integrally connected to both sides of the annular body 40 to a single yoke 200 Ultra-thin earphone speaker unit, characterized in that provided.
delete The method of claim 1,
The main body frame 100 is composed of a tubular body 110 and the bottom plate ring 120, the bottom plate ring 120 is formed of an injection molded product formed with an installation hole 122 to insert the outer plate 60, or the tubular body ( 110) Ultra-thin earphone speaker unit, characterized in that the bottom plate ring 120 is integrally banded so that the bottom surface of the magnet (30) is supported. A diaphragm 10 provided to support the edge portion of the main body frame 100;
A voice coil 20 attached to the rear surface of the diaphragm 10 to generate a magnetic field by an electric signal;
A magnet 30 provided inside the body frame 100 to react with the voice coil 20 magnetic field;
An annular body 40 disposed to be spaced apart from the rear surface of the diaphragm 10 and having a hollow hole 42 formed in a center thereof;
An inner plate 50 which closes the upper portion of the annular body 40 and has an inner port 52 formed at the center thereof;
An outer plate 60 connected to the main body frame 100 to support a lower portion of the annular body 40;
An insert groove 70 formed through the center of the outer plate 60 so as to have a size larger than an inner diameter of the annular body 40 and a stepped 72 formed by an end portion of the annular body 40;
Inserted and installed in the insert groove 70, to close the lower portion of the annular body 40 to form a volume chamber (1), the center is provided with a PCB (80) having an outer port 82; ,
The magnet 30 has an internal speaker structure positioned at the center of the voice coil 20, and forms the annular body 40 with the magnet 30, and the outer plate 60 has a voice coil ( 20) The ultra-thin earphone speaker unit, characterized in that the annular side wall (62) surrounding the outside is integrally connected to be provided as a single yoke (300). The method of claim 4, wherein
The body frame 100 is composed of a tubular body 100 and the bottom plate ring 120, the bottom plate ring 120 is integrally connected to the upper portion of the annular side wall 62 of the yoke 300 is characterized in that formed as a single part Ultra-thin earphone speaker unit. The method of claim 4, wherein
The main body frame 100 is composed of a tubular body 100 and the bottom plate ring 120, molded into an injection molded product formed with an installation hole 122 so that the outer plate 60 is inserted into the bottom plate ring 120, or the tubular body ( 110) Ultra-thin earphone speaker unit, characterized in that the bottom plate ring 120 is formed integrally bending so that the bottom of the outer plate (60) is supported at the end. The method according to any one of claims 1 and 3 to 6,
Ultra-thin earphone speaker unit, characterized in that the mesh resistance plate 90 is installed in any one or more of the inner and outer ports (52, 82) to control the flow of air into the volume chamber (1).

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