Loudspeaker unit

Abstract

The utility model discloses a loudspeaker unit which comprises a support, a bonding pad, U iron, a magnet, a washer, a diaphragm, a voice coil and a lead. Two bosses are arranged upwards on the upper end face of a support, and two leads are respectively fixed on the corresponding bosses and are suspended above the upper end face of the support; when the earphone works, even if the lead wire is driven by the voice coil to move up and down, the lead wire does not directly impact on the surface of the support, so that the problem of noise is prevented. The protection glue is formed at the welding position of each lead and the voice coil in a dispensing mode, so that the protection glue protects the lead air channel connected with the root of the voice coil, the leads are prevented from being subjected to cutting force applied by the side wall of the voice coil when the voice coil moves up and down, the leads are prevented from being damaged, and the service life of the voice coil is prolonged. And the problem that the lead wire is broken to cause no sound is solved.

Description

Technical Field

[0001] The utility model relates to the field of earphones, in particular to a speaker unit. Background Art

[0002] Headphone speakers are generally categorized by their soldering method: internally welded and externally welded. The key difference lies in the fact that the lead glue for externally welded speakers must be coated with white oil or other adhesive to secure the two voice coil leads to the diaphragm, while the leads of internally welded speakers are suspended between the diaphragm and the bracket. Because the extra glue weight is added to certain areas of the diaphragm of externally welded speakers, the diaphragm cannot perform the regular up-and-down piston-like motion when the voice coil is driven. This, on the one hand, makes the frequency response curve inconsistent and causes increased harmonic distortion, and on the other hand, it is more prone to generating noise and other operational defects. Comparing the two structures, internally welded speakers are easier to process using jigs and automation, resulting in higher efficiency and more stable quality. They also offer a cleaner appearance and more stable dimensions, without issues such as solder height, irregularities in protective adhesive, and irregularities in adhesive gaps. Therefore, internally welded speakers are more popular in the market.

[0003] Existing internally welded speakers typically first solder the leads at both ends of the voice coil to the pads of a plastic bracket. Glue is then applied to the contact surfaces between the leads and the bracket to secure and protect the leads. With this structure, one end of the lead wire directly contacts the bracket surface, while the other end, connected to the voice coil, is suspended in the air. During operation, the vibration of the voice coil drives the lead wire up and down, causing it to strike the bracket surface and generate noise. This is particularly true for open-back OWS headphones, which, due to their high power, high sensitivity, and strong low frequencies, often require the speaker to withstand greater diaphragm vibrations, making it susceptible to noise from the lead wires striking the bracket. Furthermore, the lead wire at the base of the voice coil is subject to shear force from the sidewalls of the voice coil as it moves up and down. This can easily damage the lead wire over extended operation, resulting in a loss of sound. Therefore, further improvements to existing internally welded speaker structures are necessary. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies in the prior art and its main purpose is to provide a speaker unit that can effectively solve the problems of existing internally welded speakers that are prone to generating noise, the lead wires at the root of the voice coil are easily damaged, and there is a tendency for silence after long-term use.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A speaker unit includes a bracket, a soldering pad, a U-iron, a magnet, a washer, a diaphragm, a voice coil and a lead; the bracket has a accommodating cavity that passes through the upper and lower end surfaces of the bracket; there are two soldering pads, which are arranged on the bracket and located on the sides of the accommodating cavity; the U-iron is arranged in the accommodating cavity and seals the lower end opening of the accommodating cavity; the magnet is arranged on the U-iron and located in the accommodating cavity; the washer is arranged on the magnet and located in the accommodating cavity; the diaphragm is arranged on the bracket and covers the upper end surface of the bracket; the voice coil is arranged on the diaphragm and moves back and forth in the accommodating cavity as the diaphragm moves up and down, and the voice coil is located at the outer periphery of the magnet and the washer; there are two leads, one end of each lead is welded to the voice coil, and the other end of the lead is welded to the corresponding soldering pad; two bosses are arranged upward on the upper end surface of the bracket, and the two leads are respectively fixed on the corresponding bosses so that the leads are suspended above the upper end surface of the bracket; and a protective glue is formed at the welding point between each lead and the voice coil by dispensing.

[0007] As a preferred solution, the bracket is penetrated by air leakage holes, and the air leakage holes are symmetrically arranged on both sides of the accommodating cavity, with two air leakage holes on each side arranged laterally at intervals, and the boss is located between the two air leakage holes.

[0008] As a preferred solution, the inner side wall of the upper opening of the accommodating cavity is integrally provided with a plurality of spaced limiting portions protruding outward, and the upper end of the U iron is provided with a limiting groove cooperating with the limiting portions.

[0009] As a preferred solution, a copper ring is provided on the periphery of the diaphragm, and the diaphragm is provided on the bracket through the cooperation between the copper ring and the bracket.

[0010] As a preferred solution, the lead is fixed to the boss by dispensing glue.

[0011] As a preferred solution, the protective glue wraps the connection portion between the root of the voice coil and the two lead wires.

[0012] As a preferred solution, the protective glue is a flexible damping glue.

[0013] As a preferred solution, the upper end surface of the voice coil and the diaphragm are assembled together by gluing.

[0014] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0015] Two upwardly projecting bosses are provided on the upper end of the bracket, and the two leads are fixed to their corresponding bosses, allowing them to hang above the upper end of the bracket. During operation, even when the leads are moved up and down by the voice coil, they do not directly impact the bracket surface, thus preventing unwanted noise. Protective adhesive is applied to the welds between each lead and the voice coil, protecting the lead wires at the base of the voice coil from shear forces exerted by the voice coil's sidewalls as the leads move up and down, thus preventing damage and preventing the possibility of a break in the lead wires and the resulting loss of sound.

[0016] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a preferred embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the exploded state of a preferred embodiment of the present utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of a preferred embodiment of the present utility model;

[0020] Figure 4 This is a partial assembly diagram of a preferred embodiment of the present utility model;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the bracket in the preferred embodiment of the present utility model.

[0022] Description of the accompanying drawings:

[0023] 10. Bracket 101, accommodating cavity

[0024] 102, vent hole 11, boss

[0025] 12. Limiting portion 20. Solder pad

[0026] 30, U iron 301, limit slot

[0027] 40, magnet 50, washer

[0028] 60, diaphragm 61, copper ring

[0029] 70, voice coil 80, lead wire

[0030] 81. Protective glue. DETAILED DESCRIPTION

[0031] Please refer to Figures 1 to 5As shown, it shows the specific structure of a preferred embodiment of the present invention, which includes a bracket 10, a pad 20, a U iron 30, a magnet 40, a washer 50, a diaphragm 60, a voice coil 70 and a lead 80.

[0032] The bracket 10 has a receiving cavity 101 extending through the upper and lower end surfaces of the bracket. Two bosses 11 are formed upwardly on the upper end surface of the bracket 10. In this embodiment, the bracket 10 is provided with air vents 102 symmetrically arranged on either side of the receiving cavity 101, with two air vents 102 spaced laterally apart on each side. The boss 11 is positioned between the two air vents 102, allowing the lead 80 to suspend directly above the air vents 102, further preventing the lead 80 from striking the upper surface of the bracket 10 and generating noise. The inner sidewall of the upper opening of the receiving cavity 101 is integrally formed with a plurality of spaced-apart stoppers 12 projecting outwardly.

[0033] There are two pads 20, which are disposed on the bracket 10 and located beside the accommodating cavity 101. In this embodiment, after the lead 80 is welded to the pad 20, the weld is protected by dispensing glue.

[0034] The U iron 30 is arranged in the accommodating cavity 101 and seals the lower end opening of the accommodating cavity 101; in this embodiment, a limiting groove 301 is opened at the upper end of the U iron 30 to cooperate with the limiting portion 12. Through the cooperation between the limiting groove 301 and the limiting portion 12, the installation position of the U iron 30 is limited, making the installation process more convenient.

[0035] The magnet 40 is disposed on the U iron 30 and is located in the accommodating cavity 101 .

[0036] The washer 50 is disposed on the magnet 40 and located in the accommodating cavity 101 .

[0037] The diaphragm 60 is arranged on the bracket 10 and covers the upper end surface of the bracket 10; in this embodiment, a copper ring 61 is provided at the periphery of the diaphragm 60, and the diaphragm 60 is arranged on the bracket 10 through the cooperation of the copper ring 61 and the bracket 10. The setting of the copper ring 61 makes the installation process between the diaphragm 60 and the bracket 10 more convenient.

[0038] The voice coil 70 is disposed on the diaphragm 60 and moves up and down in the accommodating cavity 101 along with the diaphragm 60 . The voice coil 70 is located at the outer periphery of the magnet 40 and the washer 50 .

[0039] Two leads 80 are provided, one end of each lead 80 being welded to the voice coil 70, and the other end being welded to a corresponding pad 20. The two leads are fixed to corresponding bosses 11, allowing the leads 80 to suspend above the upper end surface of the bracket 10. When the voice coil 70 moves the leads 80 up and down, this prevents the leads 80 from striking the upper end surface of the voice coil 70 and generating noise, thereby ensuring the sound quality of the earphones. Furthermore, a protective adhesive 81 is applied to the weld between each lead 80 and the voice coil 70, preventing the sidewalls of the voice coil 70 from shearing the leads 80 during vertical movement. This protects the leads 80 from damage and prevents breakage, which can cause loss of sound, thereby ensuring the life of the earphones.

[0040] In this embodiment, the leads 80 are fixed to the boss 11 by dispensing glue. Similarly, the leads 80 can also be fixed to the boss by other methods, without limitation. The protective glue 81 wraps around the base of the voice coil 70 and the connection between the two leads 80, thereby effectively protecting the weld between the leads 80 and the voice coil 70. The protective glue 81 is a flexible damping glue, such as 223BL resin glue. In other embodiments, other protective glues can also be used, without limitation. The upper end surface of the voice coil 70 and the diaphragm 60 are assembled together using adhesive. Furthermore, the protective adhesive 81 at the base of the voice coil 70 should be kept from forming solidified lumps of adhesive during prolonged use. This can affect subsequent assembly processes with the diaphragm 60. If a solidified lump forms between the voice coil 70 and the diaphragm 60, the two will not fit neatly together when assembled, inevitably affecting other acoustic properties, such as the frequency response curve and distortion. Therefore, during assembly, after applying the protective adhesive, the waiting time between applying the adhesive and the next step of assembling the voice coil 70 and diaphragm 60 is determined based on the adhesive's surface curing time (e.g., 223BL, recommended within 30 seconds). While the protective adhesive is still liquid, the diaphragm 60 can be directly assembled with the voice coil 70 in the next step. This allows the adhesive on the diaphragm 60 to merge with the protective adhesive at the base of the voice coil 70, forming a single, integrated unit. This prevents acoustic performance and prevents the voice coil 70 from breaking.

[0041] The key design features of this utility model are: two upwardly projecting bosses are formed on the upper end surface of the bracket, and the two lead wires are fixed to the corresponding bosses, allowing the lead wires to hang above the upper end surface of the bracket. During operation, even when the lead wires are moved up and down by the voice coil, they will not directly impact the surface of the bracket, thereby preventing noise. Furthermore, protective glue is applied to the welds between each lead wire and the voice coil through a dispensing method. This protective glue protects the lead wire airway at the base of the voice coil, preventing the lead wires from being cut by the side walls of the voice coil when the voice coil moves up and down, thus avoiding damage to the lead wires and preventing the problem of no sound caused by lead wire breakage.

[0042] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A speaker unit, comprising a bracket, a soldering pad, a U-iron, a magnet, a washer, a diaphragm, a voice coil, and a lead; the bracket having a receiving cavity penetrating the upper and lower end surfaces of the bracket; two soldering pads, both of which are arranged on the bracket and located on the sides of the receiving cavity; the U-iron is arranged in the receiving cavity and seals the lower end opening of the receiving cavity; the magnet is arranged on the U-iron and located in the receiving cavity; the washer is arranged on the magnet and located in the receiving cavity; the diaphragm is arranged on the bracket and covers the upper end surface of the bracket; the voice coil is arranged on the diaphragm and moves up and down in the receiving cavity with the diaphragm, and the voice coil is located on the outer periphery of the magnet and the washer; two leads are arranged, one end of each lead is welded to the voice coil, and the other end of the lead is welded to the corresponding soldering pad; the characteristics are: The upper end surface of the bracket is upwardly provided with two bosses, and the two leads are respectively fixed on the corresponding bosses so that the leads are suspended above the upper end surface of the bracket; and protective glue is formed at the welding point between each lead and the voice coil by dispensing glue.

2. The speaker unit according to claim 1, characterized in that: The bracket is penetrated by air leakage holes, and the air leakage holes are symmetrically arranged on both sides of the accommodating cavity, with two air leakage holes on each side arranged laterally and spaced apart, and the boss is located between the two air leakage holes.

3. The speaker unit according to claim 1, characterized in that: The inner side wall of the upper opening of the accommodating cavity is integrally provided with a plurality of spaced limiting parts protruding outward, and the upper end of the U iron is provided with a limiting groove matched with the limiting parts.

4. The speaker unit according to claim 1, characterized in that: A copper ring is provided at the periphery of the diaphragm, and the diaphragm is arranged on the bracket through the cooperation between the copper ring and the bracket.

5. The speaker unit according to claim 1, characterized in that: The lead is fixed on the boss by dispensing glue.

6. The speaker unit according to claim 1, characterized in that: The protective glue wraps the connection part between the root of the voice coil and the two lead wires.

7. The speaker unit according to claim 6, characterized in that: The protective glue is a flexible damping glue.

8. The speaker unit according to claim 1, characterized in that: The upper end surface of the voice coil and the diaphragm are assembled together by means of glue.

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