Miniature speaker with thermally conductive housing

Abstract

The utility model discloses a miniature loudspeaker with heat conduction shell, which comprises a magnetic return structure, a bracket, a diaphragm, a voice coil and a bowl-shaped heat conduction shell. The magnetic return structure has a magnetic gap and a ventilation hole communicating with the magnetic gap. The bracket is combined with the magnetic return structure. The outer periphery of the diaphragm is combined with the bracket. The voice coil is combined with the diaphragm and located in the magnetic gap. The bowl-shaped heat conduction shell is combined with and abuts against the bottom edge of the magnetic return structure and the outer side edge of the bracket, and a ventilation gap is formed in cooperation with the ventilation hole. Thus, the miniature loudspeaker with heat conduction shell can quickly conduct the waste heat accumulated in the interior of the miniature loudspeaker to the exterior, avoiding damage of the miniature loudspeaker due to high temperature.

Description

Technical Field

[0001] This utility model relates to a miniature loudspeaker with a heat-conducting shell, and more particularly to a design that utilizes the heat-conducting shell to rapidly conduct waste heat accumulated inside the miniature loudspeaker to the outside. Background Technology

[0002] The operating principle of a loudspeaker relies on the electromagnetic interaction between an electric current passing through the voice coil and the magnetic circuit. This electromagnetic interaction causes the voice coil to shift axially, thereby driving the diaphragm to produce sound. However, as the input current increases, the heat generated accumulates, causing the voice coil and magnet to heat up. Higher temperatures reduce the loudspeaker's efficiency, and eventually, exceeding the voice coil's operating temperature, will cause permanent damage, leading to loudspeaker failure. This is especially true for miniature loudspeakers, where the pursuit of small size and high power makes them more susceptible to failure due to the continuous accumulation of heat as temperatures rise. Utility Model Content

[0003] The purpose of this invention is to provide a miniature speaker with a heat-conducting shell, which can quickly conduct the waste heat accumulated inside the miniature speaker to the outside, thus preventing the miniature speaker from being damaged due to high temperature.

[0004] Another objective of this invention is to balance the pressure difference inside and outside the miniature loudspeaker, avoid interference with the voice coil operation, and maintain good sound quality.

[0005] To achieve the above-mentioned effects, the technical features of this utility model include: a magnetic return structure having a magnetic gap and a vent hole formed therein connecting the magnetic gap to the outside; a bracket attached to the magnetic return structure; a diaphragm with its outer periphery attached to the bracket; a voice coil attached to the diaphragm and located within the magnetic gap; and a bowl-shaped heat-conducting shell attached to and abutting the bottom edge of the magnetic return structure and the outer edge of the bracket, and having a vent hole formed therein to match the vent hole.

[0006] Furthermore, the bowl-shaped heat-conducting shell has a shell bottom, an annular sidewall portion, and an annular protrusion portion. The annular sidewall portion is formed around the periphery of the shell bottom, and the annular protrusion portion is formed around the top edge of the annular sidewall portion. The top edge of the shell bottom is joined to and abuts against the bottom edge of the magnetic return structure, and the inner edge of the annular sidewall portion is joined to and abuts against the outer edge of the support. The annular protrusion portion serves as the junction with the outside. A double-sided adhesive tape, specifically double-sided thermally conductive tape, is attached to the top or bottom edge of the annular protrusion portion.

[0007] Furthermore, the bracket has electrical contacts for external electrical connection, and the bowl-shaped heat-conducting shell is formed with contact notches to accommodate these electrical contacts. The magnetic return structure, the bracket, the diaphragm, the voice coil, and the bowl-shaped heat-conducting shell are all rectangular in shape. The electrical contacts are formed at the corners of the bracket, and the contact notches are formed at the corners of the bowl-shaped heat-conducting shell. The bracket has electrical contacts formed at at least two corners.

[0008] Furthermore, the bowl-shaped heat-conducting shell is integrally molded from ceramic or metal. Specifically, the bowl-shaped heat-conducting shell is integrally molded from alumina, aluminum nitride, carbon steel, or stainless steel. Attached Figure Description

[0009] Figure 1 This is a top-view structural schematic diagram of the present invention;

[0010] Figure 2 This is a structural schematic diagram of the present invention from a downward viewing angle;

[0011] Figure 3 This is a structural diagram of the present invention integrated into an external application product (before integration);

[0012] Figure 4 This is a schematic diagram of the structure of this utility model combined with an external application product (after combination);

[0013] Figure 5 This is a three-dimensional sectional view of the structure of the present invention combined with an external application product;

[0014] Figure 6 This is a planar sectional view illustrating the present invention in conjunction with an external application product;

[0015] Explanation of markings in the diagram:

[0016] 10: Magnetic loop structure;

[0017] 11: Magnetic gap;

[0018] 12: Ventilation holes;

[0019] 20: Bracket;

[0020] 21: Electrical contacts;

[0021] 30: Diaphragm;

[0022] 40: Voice coil;

[0023] 50: Bowl-shaped heat-conducting shell;

[0024] 51: Breathing opening;

[0025] 52: Bottom of the shell;

[0026] 53: Annular sidewall portion;

[0027] 54: Annular protrusion;

[0028] 55: Double-sided tape;

[0029] 56: Connection gap;

[0030] 60: External application products. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0033] The following is a reference to the appendix. Figure 1 To be continued Figure 6 The present invention comprises: a magnetic return structure 10 having a magnetic gap 11 and a vent hole 12 formed therein, connecting the magnetic gap 11 to the outside; a bracket 20, which is attached to the magnetic return structure 10; a diaphragm 30, which is attached to the bracket 20 at its outer periphery; a voice coil 40, which is attached to the diaphragm 30 and located inside the magnetic gap 11; and a bowl-shaped heat-conducting shell 50, which is attached to and abuts against the bottom edge of the magnetic return structure 10 and the outer edge of the bracket 20, and has a vent hole 51 formed therein to match the vent hole 12. The bowl-shaped heat-conducting shell 50 is integrally formed of ceramic (alumina or aluminum nitride) or metal (carbon steel or stainless steel).

[0034] The bowl-shaped heat-conducting shell 50 has a shell bottom 52, an annular sidewall portion 53, and an annular protrusion portion 54. The annular sidewall portion 53 is formed on the periphery of the shell bottom 52, and the annular protrusion portion 54 is formed on the top edge of the annular sidewall portion 53. The top edge of the shell bottom 52 is joined to and abuts against the bottom edge of the magnetic return structure 10, and the inner edge of the annular sidewall portion 53 is joined to and abuts against the outer edge of the bracket 20. A double-sided adhesive tape 55 is attached to the top or bottom edge of the annular protrusion portion 54 as a joint with the application product (mobile phone, laptop, tablet, etc.). The double-sided adhesive tape 55 is a double-sided thermally conductive tape used to help dissipate heat.

[0035] The bracket 20 has an electrical contact 21 that is electrically connected to the outside. The bowl-shaped heat-conducting shell 50 is formed with a contact notch 56 to match the electrical contact 21. When the magnetic return structure 10, the bracket 20, the diaphragm 30, the voice coil 40 and the bowl-shaped heat-conducting shell 50 are all rectangular, the electrical contact 21 is formed at the corner of the bracket 20, so that the bracket 20 has at least two corners with the electrical contact 21 formed. The contact notch 56 is formed at the corner of the bowl-shaped heat-conducting shell 50.

[0036] Based on the above configuration, this utility model combines a bowl-shaped heat-conducting shell 50 with and abuts against the bottom edge of the magnetic return structure 10 and the outer edge of the bracket 20. Then, it is attached to the application product 60 by double-sided adhesive tape 55 attached to the bowl-shaped heat-conducting shell 50. The bowl-shaped heat-conducting shell 50 is in direct contact with the magnetic return structure 10, so that the waste heat accumulated inside the miniature speaker can be quickly conducted to the application product 60 through the bowl-shaped heat-conducting shell 50 and the double-sided (thermal) adhesive tape 55. Therefore, this utility model has the function of quickly conducting the waste heat accumulated inside the miniature speaker to the outside, avoiding damage to the miniature speaker due to high temperature.

[0037] In addition, the ventilation opening 51 of the bowl-shaped heat-conducting shell 50 allows the ventilation hole 12 of the magnetic return structure 10 to be exposed, so that the airflow generated by the operation of the voice coil 40 can be directly discharged to the outside of the miniature speaker through the ventilation hole 12 and the ventilation opening 51; therefore, this utility model also has the effect of balancing the pressure difference inside and outside the miniature speaker, avoiding interference with the operation of the voice coil, and maintaining good sound quality performance.

[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A miniature loudspeaker with a heat-conducting shell, comprising: A magnetic loop structure has a magnetic gap and is formed with a vent hole connecting the magnetic gap to the outside; A support frame is attached to the magnetic loop structure; A diaphragm, with its outer periphery attached to the support; A voice coil, coupled to the diaphragm and located within the magnetic gap; and A bowl-shaped heat-conducting shell is attached to the bottom edge of the magnetic return structure and the outer edge of the bracket, and is formed with a venting notch to match the venting hole.

2. The miniature loudspeaker with a thermally conductive shell according to claim 1, wherein, The bowl-shaped heat-conducting shell has a shell bottom, an annular sidewall portion and an annular protrusion portion. The annular sidewall portion is formed on the periphery of the shell bottom, and the annular protrusion portion is formed on the top edge of the annular sidewall portion. The top edge of the shell bottom is joined to and abuts against the bottom edge of the magnetic return structure, and the inner edge of the annular sidewall portion is joined to and abuts against the outer edge of the bracket. The annular protrusion portion serves as the junction with the outside.

3. The miniature loudspeaker with a thermally conductive shell according to claim 2, wherein, A double-sided adhesive tape is attached to the top or bottom edge of the annular protrusion.

4. The miniature loudspeaker with a thermally conductive shell according to claim 3, wherein, This double-sided tape is a double-sided thermally conductive tape.

5. The miniature loudspeaker with a thermally conductive shell according to claim 1, wherein, The bracket has electrical contacts for external electrical connection, and the bowl-shaped heat-conducting shell is formed with contact notches to fit the electrical contacts.

6. The miniature loudspeaker with a thermally conductive shell according to claim 5, wherein, The magnetic return structure, the bracket, the diaphragm, the voice coil, and the bowl-shaped heat-conducting shell are all rectangular in shape. The electrical contact is formed at the bend of the bracket, and the contact notch is formed at the bend of the bowl-shaped heat-conducting shell.

7. The miniature loudspeaker with a thermally conductive shell according to claim 6, wherein, The bracket has electrical contacts formed at at least two bends.

8. The miniature loudspeaker with a thermally conductive shell according to claim 1, wherein, The bowl-shaped heat-conducting shell is made of ceramic or metal in one piece.

9. The miniature loudspeaker with the heat-conducting shell according to claim 8, wherein, The bowl-shaped heat-conducting shell is integrally molded from aluminum oxide, aluminum nitride, carbon steel, or stainless steel.

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