Loudspeaker

Abstract

The utility model provides a loudspeaker which is characterized in that the loudspeaker comprises a vibration system, the vibration system is provided with a guide shaft, the guide shaft is arranged along the vibration direction, the guide shaft is slidably connected with a shaft sleeve matched with the guide shaft, and one end of the guide shaft is located in the shaft sleeve and can slide along the shaft sleeve. The guide shaft is arranged on the vibration system, the guide shaft is connected with the shaft sleeve in a sliding mode, swing vibration of the vibration system during vibration is limited, balanced vibration is achieved, and compared with an existing scheme, the constraint system is small in occupied space, light in weight, high in bonding strength, good in reliability, easy to assemble, low in cost and good in product performance.

Description

Technical Field

[0001] The utility model relates to the field of electronic products, in particular to a loudspeaker. Background Art

[0002] In order to obtain better sound effects, the speaker has an increasing demand for amplitude. The increase in speaker amplitude requires a softer diaphragm and a greater driving force. A softer diaphragm will weaken the binding force of the product on the vibration system, making the product easier to produce sound and roll vibration. The assembly of the vibration system and the processing of the vibration system components will have tolerances. This tolerance will cause the vibration system to have different weights or different binding forces at different points. When the driving force acts on the vibration system, the feedback generated at different points of the vibration system will be inconsistent and polarized. When the amplitude is small or the driving force is small, that is, the driving acceleration is small, this polarization feedback is not obvious. On the contrary, as the amplitude increases, this polarization will become more and more obvious.

[0003] In order to reduce polarization, the prior art generally adopts the solutions of FPC centering support, FPC centering support plus auxiliary film, and elastic wave.

[0004] The existing solution requires that the auxiliary restraint component be arranged in the X and Y directions of the product to connect the voice coil and the basin frame. In order to reduce the damping generated by the auxiliary restraint component on the vibration component, the restraint component needs to be set to a cantilever or wave shape and the hardness cannot be too high. Therefore, on the one hand, the auxiliary restraint component occupies the space in the X and Y directions of the product and sacrifices the volume of the magnetic circuit system and the structural space of the basin frame. On the other hand, because the hardness cannot be too high, the restraint force on the product will be weakened.

[0005] In the existing solution, the binding component and the vibration component are mainly combined by gluing without mechanical fixation, which places high requirements on the glue and bonding process, and there is a high risk of binding failure in the product.

[0006] The existing solution uses a restraining assembly arranged in the XY direction, but it vibrates in the Z direction during vibration. Therefore, stress concentration will occur in the restraining assembly at the fixed position of the basin frame, the vibration system, and the cantilever corners, and the risk of failure of the restraining assembly is high.

[0007] The existing solution requires multiple positioning when assembling the constraint components into the product, such as the centering support and the basin frame, the centering support and the voice coil, the centering support and the auxiliary membrane, etc. Multiple positioning will bring more errors, resulting in a greater risk of the vibration system deviating from the design center and causing polarization.

[0008] The existing solutions have high material costs for the components of the restraint assembly, large size, complex processing methods, and high component costs.

[0009] The stacking of the restraining components in the Z direction affects the Z-direction height of the product. The product needs to stack the height of the auxiliary film folding ring and the centering support piece.

[0010] In the existing solution, a restraining component is added to the vibration system, which increases the weight of the vibration system and affects the sensitivity of the product. Utility Model Content

[0011] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide a speaker.

[0012] The purpose of the utility model is achieved through the following technical measures: a speaker, characterized in that it includes a vibration system, a guide shaft is arranged on the vibration system, the guide shaft is arranged along the vibration direction, the guide shaft is slidably connected with a shaft sleeve that matches it, and one end of the guide shaft is located in the shaft sleeve and can slide along the shaft sleeve.

[0013] As a preferred solution, the amplitude of the guide shaft is f, the distance from the end of the guide shaft away from the vibration system to the end of the sleeve close to the vibration system is H, and H≥1.2f.

[0014] As a preferred solution, the guide shaft and the shaft sleeve are greased or plated, or are directly made of wear-resistant and smooth materials.

[0015] As a preferred solution, the guide shaft is arranged at the center of the vibration system.

[0016] As a preferred solution, the vibration system includes a spherical top, and the guide shaft and the spherical top are integrally formed.

[0017] As a preferred solution, the guide shaft is fixed to the vibration system by inlaying, riveting, gluing or welding.

[0018] As a preferred solution, it further comprises a magnetic circuit system, the bushing is fixedly mounted on the magnetic circuit system, and the guide shaft is arranged toward the magnetic circuit system.

[0019] As a preferred embodiment, the magnetic circuit system includes a central magnet and a central pole piece, the central pole piece is provided with a first mounting hole, the central magnet is provided with a second mounting hole corresponding to the first mounting hole, the first mounting hole and the second mounting hole are both through holes, and the sleeve is installed in the first mounting hole.

[0020] As a preferred solution, one end of the sleeve away from the central magnetic steel is located in the first mounting hole.

[0021] As a preferred solution, it further includes a magnetic cover, wherein an avoidance groove is provided at a position corresponding to the second mounting hole of the magnetic cover, the diameter of the avoidance groove is larger than the diameter of the guide shaft, and a gasket is pasted in the avoidance groove.

[0022] Due to the adoption of the above technical scheme, compared with the prior art, the advantages of the utility model are: by arranging a guide shaft on the vibration system, the guide shaft is slidably connected with a shaft sleeve, so as to limit the swing vibration of the vibration system during vibration and achieve balanced vibration. Compared with the existing scheme, the restraint system occupies a small space, is light in weight, has high bonding strength, good reliability, simple assembly, low cost and good product performance.

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 The utility model is a schematic diagram of the exploded structure of a loudspeaker.

[0025] Attached Figure 2 The utility model is a schematic cross-sectional structure diagram of a loudspeaker.

[0026] Attached Figure 3 The utility model is a schematic diagram of a local amplification structure of a loudspeaker. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example: As shown in the attached Figure 1-3 As shown, a loudspeaker comprises a basin frame 1 and a magnetic cover 2, wherein a magnetic circuit system is installed on the magnetic cover 2, and a vibration system cooperating with the magnetic circuit system is installed on the basin frame 1, a guide shaft 3 is arranged on the vibration system toward the magnetic circuit system, and the guide shaft 3 is arranged along the vibration direction, and a shaft sleeve 4 is arranged at a position corresponding to the magnetic circuit system and the guide shaft 3, wherein one end of the guide shaft 3 is installed on the vibration system, and the other end is located in the shaft sleeve 4 and can slide along the shaft sleeve 4.

[0029] like Figure 1-2 As shown, the vibration system includes a dome 5, and the guide shaft 3 is located at the center of the dome 5. In this embodiment, the guide shaft 3 is cylindrical. The guide shaft 3 and the dome 5 are integrally formed. In this embodiment, the dome 5 is stretched and formed. The forming process is simple and can avoid adding extra weight to the dome (the overall volume of the material remains unchanged, and the shape of the material is changed by stretching to make the local material flow), which is beneficial to the improvement of product performance. It is also possible to open a hole in the middle of the dome 5 and inlay or rivet the guide shaft 3; or glue the middle of the dome 5 to bond the guide shaft 3; or weld the dome 5 and the guide shaft 3.

[0030] In this embodiment, one guide shaft 3 is provided, and other numbers can also be provided as needed, and the sleeve 4 can correspond to the guide shaft 3 one by one. When the product size exceeds 20 mm, more than two guide shafts should be provided, and the guide shafts should be distributed around the center of the product to avoid the suppression effect being unclear. The cross section of the guide shaft 3 can also be set to a square or other shape, as long as the inner hole shape of the sleeve 4 corresponds thereto.

[0031] like Figure 2-3 As shown, the magnetic circuit system includes a central magnetic steel 7 and a central pole piece 6. The central magnetic steel 7 is fixedly bonded to the magnetic cover 2. The central pole piece 6 is fixed to the central magnetic steel 7. A first mounting hole 8 for mounting the sleeve 4 is provided on the central magnetic steel 7. A second mounting hole 9 corresponding to the first mounting hole 8 is provided on the central magnetic steel 7. In this embodiment, the first mounting hole 8 and the second mounting hole 9 are both through holes. The sleeve 4 is arranged in a T-shape, and the corresponding first mounting hole 8 is also arranged in a T-shape, which is convenient for limiting the sleeve 4 and preventing the sleeve 4 from slipping out. The sleeve 4 is fixed to the central pole piece 6 in the first mounting hole 8 by riveting, welding, etc., and can also be fixed by glue bonding. The end of the sleeve 4 away from the central magnetic steel 7 is completely located in the first mounting hole 8, as shown in FIG. Figure 2 As shown, the horizontal height of the sleeve 4 is lower than the upper surface of the center pole piece 6, which can prevent the sleeve 4 from being higher than the product surface and affecting the vibration space. The second mounting hole 9 is used to avoid the guide shaft 3 moving up and down. The diameter of the second mounting hole 9 is larger than the inner hole diameter of the sleeve 4 to avoid assembly errors causing the sleeve 4 and the second mounting hole 9 to be misaligned and blocked.

[0032] like Figure 3 As shown, the amplitude of the product is f, and the corresponding guide shaft 3 vibrates with the product, and its amplitude is also f. The distance from the lower end of the guide shaft 3 to the upper end of the sleeve 4 is H, H≥1.2f. In this embodiment, H=1.3f, which can ensure that the shaft cannot fall out of the sleeve 4 when the product vibrates up and down.

[0033] The guide shaft 3 and the sleeve 4 can be lubricated with grease, and the surfaces of the guide shaft 3 and the sleeve 4 can also be plated with a coating, such as a ceramic coating, a cemented carbide coating, etc. The materials of the guide shaft 3 and the sleeve 4 can also be directly selected from wear-resistant and smooth materials, such as ceramics, carbon fiber, etc.

[0034] The guide shaft and the sleeve are clearance-matched. The clearance limit state is 0.00-0.02 on one side. If the clearance is too small, it will affect the movement of the guide shaft and the damping of the product will increase. If the clearance is too large, the limiting effect of the guide shaft will be reduced and the rolling vibration cannot be effectively reduced. When assembling the product, align the guide shaft 3 and insert it into the sleeve 4.

[0035] like Figure 1-3As shown, a avoidance groove 10 is provided at the position corresponding to the magnetic cover 2 and the second mounting hole 9. In this embodiment, the avoidance groove 10 is circular, and the diameter of the avoidance groove 10 is larger than the diameter of the guide shaft 3. A gasket 11 is pasted in the avoidance groove 10. The avoidance groove 10 can increase the vibration space, and the gasket 11 can buffer and avoid noise when the guide shaft 3 is bottomed. When the vibration space under the guide shaft is insufficient, a through hole can also be provided in the magnetic cover, but this position needs to be avoided when the whole machine is assembled to prevent the guide shaft from interfering with the whole machine when it protrudes.

Claims

1. A loudspeaker, characterized in that: The invention comprises a vibration system, wherein a guide shaft is arranged on the vibration system, the guide shaft is arranged along the vibration direction, the guide shaft is slidably connected with a shaft sleeve matched therewith, and one end of the guide shaft is located in the shaft sleeve and can slide along the shaft sleeve.

2. A loudspeaker according to claim 1, characterized in that: The amplitude of the guide shaft is f, and the distance from one end of the guide shaft away from the vibration system to one end of the sleeve close to the vibration system is H, where H≥1.2f.

3. A loudspeaker according to claim 1, characterized in that: The guide shaft and the shaft sleeve are greased or plated, or directly made of wear-resistant and smooth materials.

4. A loudspeaker according to claim 1, characterized in that: The guide shaft is arranged at the center position of the vibration system.

5. A loudspeaker according to claim 1, characterized in that: The vibration system comprises a spherical top, and the guide shaft and the spherical top are integrally formed.

6. A loudspeaker according to claim 1, characterized in that: The guide shaft is fixed to the vibration system by inlaying, riveting, gluing or welding.

7. A loudspeaker according to any one of claims 1 to 6, characterized in that: It also includes a magnetic circuit system, the sleeve is fixedly installed on the magnetic circuit system, and the guide shaft is arranged toward the magnetic circuit system.

8. A loudspeaker according to claim 7, characterized in that: The magnetic circuit system includes a central magnet and a central pole piece, the central pole piece is provided with a first mounting hole, the central magnet is provided with a second mounting hole corresponding to the first mounting hole, the first mounting hole and the second mounting hole are both through holes, and the sleeve is installed in the first mounting hole.

9. A loudspeaker according to claim 8, characterized in that: One end of the sleeve away from the central magnetic steel is located in the first mounting hole.

10. A loudspeaker according to claim 8, characterized in that: It also includes a magnetic cover, wherein an avoidance groove is arranged at a position corresponding to the second mounting hole, the diameter of the avoidance groove is larger than the diameter of the guide shaft, and a gasket is pasted in the avoidance groove.

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