MINI LOUDSPEAKER

Abstract

A mini loudspeaker includes a shell, a vibration system and a magnetic circuit system are received in the shell, and the shell is made up by jointing at least two shell bodies. A protruding sealing portion is provided on one of the shell bodies at a portion where the shell body is sealed with another shell body, the sealing portion is formed integrally with the shell body by bi-color injection molding process, material of the sealing portion has a hardness smaller than hardness of material of the shell body and has compressibility; the shell body is further provided with a jointing component configured to join the shell body to another shell body, and the jointing component and the sealing portion are located on the same side. The mini loudspeaker addresses the sealing issue of products under the condition of a small space and has a good sealing performance.

Claims

1. A mini loudspeaker, comprising a shell, and a vibration system and a magnetic circuit system which are received in the shell, wherein and the shell is made up by jointing at least two shell bodies, a protruding sealing portion is provided on one of the shell bodies at a portion where the shell body is sealed with another one of the shell bodies, the sealing portion is formed integrally with the shell body by bi-color injection molding process, material of the sealing portion has a hardness smaller than the hardness of material of the shell body, and the sealing portion has a compressibility; and the shell body is further provided with a jointing component configured to join the shell body to another one of the shell bodies, and the jointing component and the sealing portion are located on the same side of the shell body.

2. The mini loudspeaker according to claim 1, wherein the structure of the sealing portion is ring-shaped, and the jointing component is located at an outer side of the sealing portion.

3. The mini loudspeaker according to claim 2, wherein the shell body provided with the sealing portion and the jointing component has a rectangular structure, the number of the jointing component is four, and the four jointing components are arranged on four corners of the shell body respectively.

4. The mini loudspeaker according to claim 3, wherein the jointing components are ultrasonic wires, and the shell body is jointed to another one of the shell bodies by ultrasonic welding process.

5. The mini loudspeaker according to claim 4, wherein the shell comprises a first shell body, a second shell body and a third shell body which are successively jointed together, and the ultrasonic wire and the sealing portion are both provided on the third shell body.

6. The mini loudspeaker according to claim 3, wherein the jointing components are hot-melt columns, hot-melt holes are provided in another one of the shell bodies at positions corresponding to the hot-melt columns respectively, and the shell body is jointed to another one of the shell bodies by hot-melt process.

7. The mini loudspeaker according to claim 6, wherein the shell comprises a first shell body, a second shell body and a third shell body which are successively jointed together, the hot-melt columns and the sealing portion are both located on the third shell body, and the hot-melt holes are located in the second shell body.

8. The mini loudspeaker according to claim 5, wherein the second shell body and the third shell body are both injection molded shell bodies.

9. The mini loudspeaker according to claim 6, wherein the shell comprises a first shell body and a second shell body jointed together, the hot-melt columns and the sealing portion are both located on the second shell body, the hot-melt holes are located in the first shell body, and the first shell body is a metal shell body.

10. The mini loudspeaker according to claim 1, wherein the material of the sealing portion is one of silica gel, thermoplastic polyurethanes, thermoplastic composites or thermoplastic rubber.

11. The mini loudspeaker according to claim 7, wherein the second shell body and the third shell body are both injection molded shell bodies.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] For more clearly illustrating the technical solutions of embodiments of the present application or in the conventional technology, drawings referred to describe the embodiments or the conventional technology will be briefly described hereinafter. Apparently, the drawings in the following description are only several embodiments of the present application, and for those skilled in the art, other drawings may be obtained based on these drawings without any creative efforts

[0022] FIG. 1 is a schematic view showing the structure of shell bodies sealed by a sealant according to the conventional technology;

[0023] FIG. 2 is a schematic view showing the structure of shell bodies sealed by ultrasonic welding according to the conventional technology;

[0024] FIG. 3 is a schematic exploded view showing the structure of shell bodies of a mini loudspeaker according to a first embodiment of the present application;

[0025] FIG. 4 is a view showing the shell bodies in FIG. 3 after being assembled;

[0026] FIG. 5 is a sectional view taken along line A-A in FIG. 4;

[0027] FIG. 6 is an enlarged view of part B in FIG. 5;

[0028] FIG. 7 is a schematic view showing the structure of a third shell body in FIG. 1;

[0029] FIG. 8 is a schematic exploded view showing the structure of shell bodies of a mini loudspeaker according to a second embodiment of the present application;

[0030] FIG. 9 is a schematic view showing the structure of a third shell body in FIG. 8;

[0031] FIG. 10 is a schematic exploded view showing the structure of shell bodies of a mini loudspeaker according to a third embodiment of the present application; and

[0032] FIG. 11 is a schematic view showing the structure of a second shell body in FIG. 10.

REFERENCE NUMERALS IN THE DRAWINGS

[0033]

TABLE-US-00001  10a first shell body,  10b first shell body,  20a second shell body,  20b second shell body,  22 hot-melt hole,  30a third shell body,  30b third shell body,  32 sealing portion,  34 ultrasonic wire,  36 hot-melt column,  40 first shell body,  42 hot-melt hole,  50 second shell body,  52 sealing portion,  54 hot-melt column, 100 shell body, 102 sealant, and 104 melted ultrasonic wire.

DETAILED DESCRIPTION

[0034] The present application is further described with reference to the drawings and embodiments hereinafter.

[0035] In the description, the term “inside” refers to a side close to the center of the shell body, and the term “outside” refers to a side away from the center of the shell.

First Embodiment

[0036] As shown in FIGS. 3, 4 and 5 together, a mini loudspeaker has a rectangular structure, including a shell which is made up of a first shell body 10a, a second shell body 20a and a third shell body 30a successively jointed together. A vibration system and a magnetic circuit system (not shown) are received in a space defined by the first shell body 10a, the second shell body 20a and the third shell body 30a together. The first shell body 10a, the second shell body 20a and the third shell body 30a are respectively injection molded shell bodies.

[0037] As shown in FIGS. 3 and 7 together, a protruding sealing portion is provided at an edge portion, at a side where the third shell body 30a is jointed with the second shell body 20a, of the third shell body 30a, and the protruding sealing portion 32 has a rectangular ring-shaped structure with round corners. The sealing portion 32 and a main body of the third shell body 30a are integrally molded by bi-color injection molding process, the material of the sealing portion 32 has a hardness smaller than that of the material of the main body of the third shell body 30a. The sealing portion 32 has a certain compressibility and elasticity, and material of the sealing portion 32 is, but not limit to, one of silica gel, TPU (Thermoplastic Polyurethanes), TPC (Thermoplastic Composites) or TPR (Thermoplastic Rubber). Any materials may be used as the materials of the sealing portion as long as the material is soft, has a compressibility and elasticity, and can be used in injection molding process.

[0038] As shown in FIGS. 3 and 7 together, a jointing component is further provided on one side, provided with the sealing portion 32, of the third shell body 30a (i.e., the side where the third shell body 30a is jointed to the second shell body 20a), and the third shell body 30a is jointed to the second shell body 20a by the jointing component to form an integrated body. In this embodiment, the jointing component is an ultrasonic wire 34, and there are four ultrasonic wires 34 respectively arranged on four corners at an outer side of the sealing portion 32. The third shell body 30a is jointed to the second shell body 20a by ultrasonic welding process.

[0039] As shown in FIGS. 5 and 6 together, after the third shell body 30a is jointed to the second shell body 20a, the sealing portion 32 is extruded by the second shell body 20a and the third shell body 30a. Since the material of the sealing portion 32 is soft and has a certain elasticity, the sealing portion 32, under the effect of extrusion force applied by the two shell bodies, is compressed and deformed to be in a close contact with the second shell body 20a, thereby achieving a sealing between the third shell body 30a and the second shell body 20a. Since each of the four ultrasonic wires 34 is short and located at the corner having a relatively large space, of the third shell body 30a, the material overflowing phenomenon may not occur after the ultrasonic wires 34 are melted, thus ensuring a good quality of the inner chamber and an esthetic appearance of the mini loudspeaker on the premise of achieving the sealing between the shell bodies. In practical application, the sealing portion and the jointing component may also be provided between the first shell body 10a and the second shell body 20a to achieve the jointing and sealing between the first shell body 10a and the second shell body 20a.

Second Embodiment

[0040] This embodiment is substantially the same as the first embodiment, except for the following different aspects.

[0041] As shown in FIGS. 8 and 9 together, the shell of the mini loudspeaker is made up of a first shell body 10b, a second shell body 20b and a third shell body 30b which are successively jointed together, and a sealing portion 32 and a jointing component are both provided on the third shell body 30b. In this embodiment, the jointing component is hot-melt columns 36 respectively arranged on four corners of the third shell body 30b, and four corners of the second shell body 20b are respectively provided with hot-melt holes 22 at positions respectively corresponding to the hot-melt columns 36. The third shell body 30b and the second shell body 20b are jointed into one piece by hot-melt process, and the sealing therebetween is achieved by the sealing portion 32.

Third Embodiment

[0042] This embodiment is substantially the same as the second embodiment except for the following different aspects.

[0043] As shown in FIGS. 10 and 11 together, a shell of the mini loudspeaker is made up of a first shell body 40 and a second shell body 50 which are jointed together, and a sealing portion 52 and hot-melt columns 54 are all provided on the second shell body 50. The sealing portion 52 is provided on an edge portion of the second shell body 50 and is a track-like ring-shaped structure. Four hot-melt columns 54 are provided on four corners outside the sealing portion 52 respectively. The first shell body 40 is provided with hot-melt holes 42 respectively at positions corresponding to the four hot-melt columns 54 respectively. The first shell body 40 is a metal shell body. The first shell body 40 is jointed to the second shell body 50 by hot-melt process, and the sealing therebetween is achieved by the sealing portion 52.

[0044] In the present application, a soft ring-shaped sealing portion is injection molded on a portion of a shell body where the shell body is sealed with another shell body by bi-color injection molding process, thereby achieving a good sealing between two shell bodies by extrusion to the sealing portion by the two shell bodies. Besides, compared with the adhesive sealing in the conventional technology, a step of applying adhesive is omitted in this process, the assembly process is simplified, and the issue of adhesive overflowing is avoided, thereby ensuring the good quality of the inner chamber and an esthetic appearance of the mini loudspeaker. In addition, compared with the ultrasonic welding process in the conventional technology, this process will not cause the issue of material overflowing, and also ensures the good quality of the inner chamber and esthetic appearance of the mini loudspeaker, thus further ensuring the acoustic performance of the mini loudspeaker and a smooth assembly with the portable electronic device, thereby effectively addressing the sealing issue of a product under the condition of a small space.

[0045] The above embodiments of the present application are merely illustrative examples of the technical solution of the present application using bi-color injection molding process to achieve sealing between the shell bodies, the shell body structure of the mini loudspeaker is not limited to the above rectangular structure, it may also be round, track-like structure and the like. The technical solution of the present application can be applied to the sealing between any kind of mini loudspeaker shell bodies, and those skilled in the art can apply the technical solutions of the present application to mini loudspeakers with other structures based on the description of the above embodiments without any creative efforts. Therefore, regardless of whether other structures of the mini loudspeaker are the same as that of the above embodiments, as long as the product employs the bi-color injection molding process to achieve the sealing between the shell bodies to simplify the assembly process and improve the quality of the inner chamber and outer appearance of the mini loudspeaker, the product falls into the scope of the present application.

[0046] Names of the features with serials numbers (e.g., the first shell body, the second shell body, and the third shell body) involved in the present application are only intended to distinguish technical features and do not represent the positional relationship between the features, assembly sequence and work sequence and the like.

[0047] The present application is not limited to the above embodiments, and various variations made by those skilled in the art based on the above concepts without any creative efforts all fall into the scope of the present application.