Dustproof cap fixing structure and loudspeaker

Abstract

The utility model discloses a dustproof cap fixing structure and a loudspeaker, the dustproof cap fixing structure comprises a voice coil, a voice cone and a dustproof cap, and the voice cone is connected with the outer side wall of the voice coil; the dustproof cap is buckled on the top of the voice coil. According to the utility model, the dustproof cap is buckled and fixed on the voice coil, adhesive is not needed between the dustproof cap and the voice coil, the connection is firm and reliable, various experimental requirements of the current loudspeaker are completely met, cooperative operation of multiple persons is not needed during installation, the production efficiency is obviously improved, particularly, the use of the adhesive is reduced, the production environment can be improved, and the production cost is reduced. And human health and personal and property safety are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeaker structures, in particular to a dust cap fixing structure and a loudspeaker. Background Art

[0002] At present, the loudspeaker is an electroacoustic transducer that radiates sound directly into the free space. Its radiating part is composed of a sound cone and a dust cap. The dust cap is mainly used to prevent dust and other debris from entering the magnetic gap of the loudspeaker from the front of the sound cone and causing abnormal sound. It is also an important component of the sound radiated by the loudspeaker. Usually, the dust cap is bonded with adhesive during the assembly process of the loudspeaker. Specifically, the sound cone and the voice coil are first bonded with adhesive, and then the dust cap and the voice coil are bonded with adhesive to form an integral structure.

[0003] However, adhesives contain chemical solvents, which are easy to evaporate during use and produce toxic and harmful gases, causing damage to human skin and organs. Some adhesives or solvents are even flammable substances, and fire prevention measures must be taken during both storage and use. In addition, the process of applying glue to bond the dust cap to the voice coil also requires the coordinated operation of multiple people, and the steps are cumbersome and inefficient. Utility Model Content

[0004] The utility model aims to provide a dust cap fixing structure and a loudspeaker, so as to solve the problem that in the existing loudspeaker assembly process, the dust cap is usually bonded to the top of the voice coil by adhesive, and the adhesive contains chemical solvents, which are easy to volatilize during use and produce toxic and harmful gases, causing damage to human skin and organs. Some adhesives or solvents are even flammable substances, and fireproof treatment is required regardless of storage or use. In addition, the process of applying glue to bond the dust cap to the voice coil also requires the coordinated operation of multiple people, and the steps are cumbersome and inefficient.

[0005] The utility model provides a dust cap fixing structure, comprising:

[0006] Voice coil;

[0007] A sound basin connected to an outer side wall of the voice coil;

[0008] A dust cap is buckled on the top of the voice coil.

[0009] Furthermore, the inner side wall of the dust cap is convexly provided with a plurality of spaced-apart clamping parts, the outer side wall of the voice coil is concavely provided with a plurality of spaced-apart clamping grooves, and the clamping parts are clamped in the corresponding clamping grooves.

[0010] Furthermore, the clamping portion and the clamping groove are both annular, the clamping portions are arranged at intervals along the vertical direction on the inner wall of the dust cap, and the clamping grooves are arranged at intervals along the vertical direction on the outer wall of the voice coil.

[0011] Furthermore, the dust cap includes a cap portion and an annular portion, the edge of the cap portion is connected to the top of the annular portion, and the clamping portion is protruding on the inner side wall of the annular portion.

[0012] Furthermore, the sound cone includes a folding ring and a diaphragm, one end of the diaphragm is bonded to the folding ring by glue, and the other end of the diaphragm is bonded to the outer wall of the voice coil by glue.

[0013] Furthermore, the folded ring includes a first connecting portion, an annular curved portion and a second connecting portion which are connected in sequence, the first connecting portion is a planar structure arranged in an annular manner, the second connecting portion is an inclined surface structure arranged in an annular manner, and the second connecting portion is connected to the diaphragm.

[0014] Furthermore, the voice coil includes a first frame, a second frame located below the first frame, and a coil wound on the outer wall of the second frame. The second frame can be selectively installed at one position of the first frame. The dust cap is snapped on the first frame, and the sound cone is connected to the first frame or the second frame.

[0015] Furthermore, the first skeleton includes a first annular support body and a second annular support body, the second annular support body is connected to the bottom of the first annular support body, the inner diameter of the first annular support body is smaller than the inner diameter of the second annular support body, the second skeleton is connected to the second annular support body, and the dust cap is snapped onto the first annular support body.

[0016] Furthermore, the second skeleton includes a third annular support body and a fourth annular support body, the fourth annular support body is connected to the bottom of the third annular support body, the outer diameter of the third annular support body is smaller than the outer diameter of the fourth annular support body, the outer wall of the third annular support body is bonded to the inner wall of the second annular support body by glue, and the coil is wound on the outer wall of the fourth annular support body.

[0017] The utility model also provides a loudspeaker, comprising a basin frame, a magnetic frame, a permanent magnet and the dust cap fixing structure as described above, wherein the magnetic frame has a accommodating cavity, the permanent magnet is accommodated in the accommodating cavity, one end of the basin frame is connected to the magnetic frame, and the other end of the basin frame is connected to the sound basin, a magnetic gap is formed between the permanent magnet and the inner wall of the magnetic frame, and the voice coil is partially inserted into the magnetic gap.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The utility model fixes the dust cap buckle on the voice coil, does not need to use adhesive between the dust cap and the voice coil, and the connection is firm and reliable, which fully meets various experimental requirements of current speakers, does not need the coordinated operation of multiple people during installation, and significantly improves production efficiency, especially reduces the use of adhesive, can improve the production environment, and protect human health and personal and property safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A partial cross-sectional view of a loudspeaker provided in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the structure of the dust cap fixing structure provided by an embodiment of the utility model;

[0022] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0023] Figure 4 A schematic diagram of the structure of a first skeleton provided in an embodiment of the utility model;

[0024] Figure 5 A cross-sectional view of a first skeleton provided in an embodiment of the utility model;

[0025] Figure 6 A cross-sectional view of a second skeleton provided in an embodiment of the utility model.

[0026] In the figure:

[0027] 10. Magnetic frame; 11. Accommodating cavity; 20. Permanent magnet; 30. Dust cap fixing structure; 31. Voice coil; 311. Slot; 312. First skeleton; 3121. First annular support body; 3122. Second annular support body; 313. Second skeleton; 3131. Third annular support body; 3132. Fourth annular support body; 314. Coil; 32. Basin; 321. Folding ring; 3211. First connecting part; 3212. Annular bending part; 3213. Second connecting part; 322. Diaphragm; 33. Dust cap; 331. Holding part; 332. Cap part; 333. Ring-shaped part; 40. Magnetic gap; 50. Glue. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0029] See also Figures 1 to 4As shown, the embodiment of the utility model discloses a loudspeaker, including a basin frame, a magnetic frame 10, a permanent magnet 20 and a dust cap fixing structure 30, the dust cap fixing structure 30 includes a voice coil 31, a sound basin 32 and a dust cap 33, the voice coil 31 is annular, the sound basin 32 is horn-shaped, the sound basin 32 is connected to the outer wall of the voice coil 31, the dust cap 33 is buckled on the top of the voice coil 31, the top of the magnetic frame 10 has a receiving cavity 11, the permanent magnet 20 is received in the receiving cavity 11, one end of the basin frame is connected to the magnetic frame 10, and the other end of the basin frame is connected to the magnetic frame 10. It is connected to the sound cone 32 to suspend the voice coil 31. A magnetic gap 40 is formed between the permanent magnet 20 and the inner wall of the magnetic frame 10. The voice coil 31 is partially inserted into the magnetic gap 40. The permanent magnet 20 and the magnetic frame 10 can generate a magnetic field in the magnetic gap 40. In the assembly of the speaker components, the sound cone 32 and the dust cap 33 are connected to the voice coil 31 to form the radiation part of the speaker. When the voice coil 31 is energized and moves under force in the magnetic field, it drives the sound cone 32 and the dust cap 33 to do piston motion together, radiating sound waves to the free field to generate sound.

[0030] It should be noted that the magnetic frame 10 and the permanent magnet 20 can constitute a magnetic circuit system, the voice coil 31, the sound basin 32 and the dust cap 33 can constitute a vibration system, that is, the dust cap fixing structure 30 can also be called a vibration system, the magnetic circuit system is fixed in the basin frame, the vibration system is fixed on the basin frame and is spaced apart from the magnetic circuit system, and the voice coil 31 in the vibration system is partially inserted into the magnetic gap 40 in the magnetic circuit system. When an alternating current is passed through the voice coil 31, the voice coil 31 in the magnetic gap 40 will move due to the action of the magnetic field, and the voice coil 31 will drive the sound basin 32 to vibrate up and down. During the vibration of the sound basin 32, the air in the space below the sound basin 32 will be compressed or expanded, thereby causing sound to be generated.

[0031] In this embodiment, the inner wall of the dust cap 33 is convexly provided with a plurality of spaced retaining portions 331, and the outer wall of the voice coil 31 is concavely provided with a plurality of spaced retaining grooves 311. The retaining portions 331 are snapped into the corresponding retaining grooves 311 to snap the dust cap 33 onto the top of the voice coil 31. The installation of the dust cap 33 does not require the coordinated operation of multiple people, and the production efficiency is significantly improved, especially the use of adhesives is reduced, which can improve the production environment and protect human health and personal and property safety.

[0032] In some embodiments, the clamping portion 331 and the clamping slot 311 are both annular, and each clamping portion 331 is arranged on the inner wall of the dust cap 33 at intervals along the vertical direction, and each clamping slot 311 is arranged on the outer wall of the voice coil 31 at intervals along the vertical direction. Each clamping portion 331 is respectively clamped in each clamping slot 311, which further reduces the probability of the dust cap 33 falling off the voice coil 31. During the specific installation, the dust cap 33 can be forcibly buckled on the voice coil 31.

[0033] In this embodiment, the dust cap 33 includes a cap portion 332 and an annular portion 333. The cap portion 332 can be an arc-shaped cover body or a conical cover body. The edge of the cap portion 332 is connected to the top of the annular portion 333. The clamping portion 331 is protruded on the inner wall of the annular portion 333. The annular portion 333 is clamped with the clamping groove 311 on the voice coil 31 through the clamping portion 331, thereby connecting the dust cap 33 with the voice coil 31.

[0034] The sound basin 32 includes a folded ring 321 and a diaphragm 322. One end of the diaphragm 322 is bonded to the folded ring 321 by glue 50, and the other end of the diaphragm 322 is bonded to the outer wall of the voice coil 31 by glue 50. The folded ring 321 is connected to the basin frame. The glue 50 can be an adhesive. Of course, the glue 50 can also be other types. In the prior art, the diaphragm 322 is fixed and installed with glue 50, so adhesive is inevitably used. However, the speaker in this embodiment reduces the use of adhesive compared to traditional speakers.

[0035] The folded ring 321 includes a first connecting portion 3211, an annular curved portion 3212 and a second connecting portion 3213 which are connected in sequence. The first connecting portion 3211 is a planar structure arranged in an annular manner. The first connecting portion 3211 is connected to the basin frame. The second connecting portion 3213 is an inclined surface structure arranged in an annular manner. The second connecting portion 3213 and the first connecting portion 3211 are arranged at an angle greater than 90 degrees. The second connecting portion 3213 is connected to the diaphragm 322 to increase the contact area between the diaphragm 322 and the folded ring 321 to prevent the diaphragm 322 from being separated from the folded ring 321 during vibration.

[0036] Please read further Figures 1 to 6 In this embodiment, the voice coil 31 includes a first skeleton 312, a second skeleton 313 located below the first skeleton 312, and a coil 314 wound on the outer wall of the second skeleton 313, the coil 314 is used to be electrically connected to an external circuit board, the second skeleton 313 is adjustably installed on the first skeleton 312, the voice coil 31 and part of the second skeleton 313 are located in the magnetic gap 40, the second skeleton 313 can be selectively installed at one of the positions of the first skeleton 312 as needed, so as to adjust the overall height of the voice coil 31 at any time, so that the coil 314 entering the magnetic gap 40 can be set as needed, the dust cap 33 is snapped on the first skeleton 312, and the sound basin 32 can be connected to the first skeleton 312 or the second skeleton 313.

[0037] The first skeleton 312 includes a first annular support body 3121 and a second annular support body 3122. The second annular support body 3122 is connected to the bottom of the first annular support body 3121. The inner diameter of the first annular support body 3121 is smaller than the inner diameter of the second annular support body 3122. The second skeleton 313 is connected to the second annular support body 3122. The distance between the second skeleton 313 and the second annular support body 3122 can be adjusted. The slot 311 is provided on the outer wall of the first annular support body 3121. The dust cap 33 is snapped onto the first annular support body 3121.

[0038] The second skeleton 313 includes a third annular support body 3131 and a fourth annular support body 3132. The fourth annular support body 3132 is connected to the bottom of the third annular support body 3131. The outer diameter of the third annular support body 3131 is smaller than the outer diameter of the fourth annular support body 3132. The coil 314 is wound on the outer wall of the fourth annular support body 3132. When the position of the coil 314 in the magnetic gap 40 is determined, the outer wall of the third annular support body 3131 can be bonded to the inner wall of the second annular support body 3122 by glue 50. Of course, the outer wall of the third annular support body 3131 can also be fixed to the inner wall of the second annular support body 3122 by snapping. Under the same conditions, the larger the portion of the voice coil 31 extending into the magnetic gap 40, the higher the magnetic field utilization rate of the voice coil 31 will be, and the sensitivity will also be improved.

[0039] In some embodiments, the inner diameters of the first annular support body 3121 , the inner diameters of the third annular support body 3131 , and the inner diameters of the fourth annular support body 3132 are all equal to reduce the resistance encountered by the voice coil 31 during the upward and downward movement.

[0040] The speaker assembly method includes the following steps:

[0041] S101, assembling the voice coil 31, firstly, preliminarily bonding the first frame 312 to the second frame 313 by glue 50, and fixing the coil 314 to the outer wall of the second frame 313;

[0042] S102, assembling the vibration system, i.e. the dust cap fixing structure 30, bonding the cone 32 and the assembled voice coil 31 by glue 50, and then fixing the dust cap 33 to the voice coil 31 from top to bottom by a special buckle method to form an integral structure;

[0043] S103, assembling the magnetic circuit system, fixing the permanent magnet 20 in the accommodating cavity 11 of the magnetic frame 10, and setting the permanent magnet 20 and the inner wall of the accommodating cavity 11 to form a magnetic gap 40;

[0044] S104, assembling the loudspeaker, fixing the assembled magnetic circuit system in the basin frame, and finally fixing the vibration system on the basin frame, the voice coil 31 in the vibration system extends into the magnetic gap 40 of the magnetic circuit system, and the extension amount of the voice coil 31 can be adjusted by re-applying glue 50.

[0045] In summary, the utility model fixes the dust cap 33 on the voice coil 31 by snapping, and no adhesive is needed between the dust cap 33 and the voice coil 31, and the connection is firm and reliable, which fully meets various experimental requirements of current speakers. The installation does not require the coordinated operation of multiple people, and the production efficiency is significantly improved. In particular, the use of adhesive is reduced, which can improve the production environment and protect human health and personal and property safety.

[0046] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A dust cap fixing structure, It is characterized in that include: Voice coil; A sound basin connected to an outer side wall of the voice coil; A dust cap is buckled on the top of the voice coil.

2. The dust cap fixing structure according to claim 1, It is characterized in that The inner side wall of the dust cap is convexly provided with a plurality of spaced-apart clamping parts, and the outer side wall of the voice coil is concavely provided with a plurality of spaced-apart clamping grooves, and the clamping parts are clamped in the corresponding clamping grooves.

3. The dust cap fixing structure according to claim 2, It is characterized in that The clamping parts and the clamping grooves are both annular, the clamping parts are arranged at intervals on the inner side wall of the dust cap along the vertical direction, and the clamping grooves are arranged at intervals on the outer side wall of the voice coil along the vertical direction.

4. The dust cap fixing structure according to claim 2, It is characterized in that The dust cap comprises a cap portion and an annular portion, the edge of the cap portion is connected to the top of the annular portion, and the clamping portion is convexly arranged on the inner side wall of the annular portion.

5. The dust cap fixing structure according to claim 1, It is characterized in that The sound basin includes a folding ring and a diaphragm, one end of the diaphragm is bonded to the folding ring by glue, and the other end of the diaphragm is bonded to the outer wall of the voice coil by glue.

6. The dust cap fixing structure according to claim 5, It is characterized in that The folded ring includes a first connecting portion, an annular curved portion and a second connecting portion which are connected in sequence. The first connecting portion is a planar structure arranged in an annular manner, the second connecting portion is an inclined surface structure arranged in an annular manner, and the second connecting portion is connected to the diaphragm.

7. The dust cap fixing structure according to claim 1, It is characterized in that The voice coil includes a first frame, a second frame located below the first frame, and a coil wound on the outer wall of the second frame. The second frame can be selectively installed at one position of the first frame. The dust cap is snapped on the first frame, and the sound basin is connected to the first frame or the second frame.

8. The dust cap fixing structure according to claim 7, It is characterized in that The first skeleton includes a first annular support body and a second annular support body, the second annular support body is connected to the bottom of the first annular support body, the inner diameter of the first annular support body is smaller than the inner diameter of the second annular support body, the second skeleton is connected to the second annular support body, and the dust cap is snapped onto the first annular support body.

9. The dust cap fixing structure according to claim 8, It is characterized in that The second skeleton includes a third annular support body and a fourth annular support body, the fourth annular support body is connected to the bottom of the third annular support body, the outer diameter of the third annular support body is smaller than the outer diameter of the fourth annular support body, the outer wall of the third annular support body is bonded to the inner wall of the second annular support body by glue, and the coil is wound on the outer wall of the fourth annular support body.

10. A loudspeaker, It is characterized in that It includes a basin frame, a magnetic frame, a permanent magnet and a dust cap fixing structure as described in any one of claims 1 to 9, the magnetic frame has a accommodating cavity, the permanent magnet is accommodated in the accommodating cavity, one end of the basin frame is connected to the magnetic frame, the other end of the basin frame is connected to the sound basin, a magnetic gap is formed between the permanent magnet and the inner wall of the magnetic frame, and the voice coil is partially inserted into the magnetic gap.

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