Miniature loudspeaker and electronic equipment

Abstract

The utility model discloses a miniature loudspeaker, which comprises a shell and a loudspeaker single body, the loudspeaker single body is arranged in the shell and divides an inner cavity of the shell into a first sound cavity and a second sound cavity, the first sound cavity comprises a first cavity body, a second cavity body and a sound cavity channel, and the second cavity body comprises a second cavity body and a sound cavity channel. Two ends of the sound cavity channel are respectively communicated with the first cavity and the second cavity, the shell is provided with at least two air inflation channels and at least one air suction channel, the first cavity and the second cavity are respectively communicated with the at least one air inflation channel, and the air suction channel is communicated with the sound cavity channel. According to the miniature loudspeaker, the filling efficiency of the acoustic filling material can be effectively improved, the acoustic filling material in the rear cavity can be filled more easily, and particularly, the filling efficiency of the miniature loudspeaker with a narrow channel in the rear cavity can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly relates to a micro-speaker and an electronic device. Background Art

[0002] With the rapid development of portable electronic devices, the requirements for the micro-speakers applied therein are also getting higher and higher. In the case where the micro-speakers of electronic products such as mobile phones and laptop computers are getting smaller and smaller, in order to keep the low-frequency performance unchanged, in the related art, acoustic filling materials (such as bass powder) are often filled in the rear cavity to form a virtual acoustic rear cavity, so as to achieve the effect of increasing the volume of the rear cavity of the micro-speaker. However, when filling the acoustic filling materials into the rear cavity, due to the presence of local narrowness in the rear cavity and the poor fluidity of the acoustic filling materials at the narrow parts, the filling efficiency of the acoustic filling materials is low. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is: to provide a micro-speaker and an electronic device to solve the problem of low filling efficiency of the acoustic filling materials in the existing micro-speakers.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a micro-speaker, which includes a housing and a speaker unit. The speaker unit is arranged in the housing and divides the inner cavity of the housing into a first sound cavity and a second sound cavity. The first sound cavity includes a first cavity, a second cavity and a sound cavity channel. The two ends of the sound cavity channel are respectively communicated with the first cavity and the second cavity. The housing is provided with at least two inflation channels and at least one suction channel. The first cavity and the second cavity are respectively communicated with at least one of the inflation channels. The suction channel is communicated with the sound cavity channel.

[0005] Further, in the micro-speaker of the utility model, the sound cavity channel extends along the length direction of the housing.

[0006] Further, in the micro-speaker of the utility model, the housing includes a cover plate and a base, and the cover plate is arranged on the base.

[0007] Further, in the micro-speaker of the utility model, both the inflation channel and the suction channel are arranged on the cover plate.

[0008] Further, in the micro-speaker of the utility model, a groove with an opening facing the cover plate is provided in the base, and the speaker unit is arranged in the groove.

[0009] Further, in the micro speaker of the present utility model, the air inflation channel includes a first sub-channel and a second sub-channel which are connected and coaxially arranged, wherein the first sub-channel is communicated with the first cavity.

[0010] Further, in the micro speaker of the present utility model, a first mesh cloth is further included, and the first mesh cloth covers the opening of the first sub-channel away from the first cavity.

[0011] Further, in the micro speaker of the present utility model, the air suction channel includes a third sub-channel and a fourth sub-channel which are connected and coaxially arranged, wherein the third sub-channel is communicated with the sound cavity channel.

[0012] Further, in the micro speaker of the present utility model, a second mesh cloth is further included, and the second mesh cloth covers the opening of the third sub-channel away from the sound cavity channel.

[0013] Correspondingly, the present utility model provides an electronic device, which includes the micro speaker as described above.

[0014] The beneficial effects of the present utility model are as follows: In the present utility model, the speaker unit is arranged in the housing, so that the inner cavity of the housing is divided into a first sound cavity (i.e., the rear cavity) and a second sound cavity (i.e., the front cavity), wherein the first sound cavity includes a first cavity, a sound cavity channel and a second cavity which are sequentially communicated. At least two air inflation channels and at least one air suction channel are opened on the housing, the first cavity and the second cavity are respectively communicated with at least one air inflation channel, and the air suction channel is communicated with the sound cavity channel. When filling the first sound cavity with acoustic filling material, acoustic filling material (such as bass powder) is arranged in the two air inflation channels, and the acoustic filling material is poured into the first cavity and the second cavity through positive pressure inflation. At the same time, the air suction channel uses negative pressure suction to guide the acoustic filling material to fill into the sound cavity channel of the rear cavity more quickly, thereby effectively improving the filling efficiency and filling quality (more uniform distribution) of the acoustic filling material, making the filling of the acoustic filling material in the rear cavity easier, and particularly contributing to improving the filling efficiency of the micro speaker with a relatively narrow channel in the rear cavity. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the micro speaker of the present utility model from a perspective in an embodiment;

[0016] Figure 2 is Figure 1 a schematic structural diagram of the micro speaker shown with the first mesh cloth and the second mesh cloth hidden;

[0017] Figure 3Exploded view of the structure of the micro speaker according to the present utility model from a certain perspective in an embodiment;

[0018] Figure 4 Schematic diagram of the structure of the micro speaker according to the present utility model with some structures hidden.

[0019] Label description:

[0020] 1. Housing; 11. Cover plate; 111. Inflation channel; 112. Suction channel; 12. Base;

[0021] 2. Speaker unit;

[0022] 3. First cavity;

[0023] 4. Second cavity;

[0024] 5. Sound cavity channel;

[0025] 6. First mesh cloth;

[0026] 7. Second mesh cloth. Specific implementation mode

[0027] To describe in detail the technical content, achieved purpose and effect of the present utility model, the following is described in conjunction with the implementation mode and with reference to the drawings.

[0028] Please refer to Figures 1 to 4 , the present utility model relates to a micro speaker, which includes a housing 1 and a speaker unit 2. The speaker unit 2 is arranged in the housing 1 and divides the inner cavity of the housing 1 into a first sound cavity and a second sound cavity. The first sound cavity includes a first cavity 3, a second cavity 4 and a sound cavity channel 5. The two ends of the sound cavity channel 5 are respectively communicated with the first cavity 3 and the second cavity 4. The housing is provided with at least two inflation channels 111 and at least one suction channel 112. The first cavity 3 and the second cavity 4 are respectively communicated with at least one of the inflation channels 111. The suction channel is communicated with the sound cavity channel 5.

[0029] As can be seen from the above description, the beneficial effects of the present utility model are as follows: In the present utility model, the speaker unit 2 is disposed within the housing 1, such that the inner cavity of the housing 1 is partitioned into a first sound cavity (i.e., the rear cavity) and a second sound cavity (i.e., the front cavity). The first sound cavity includes a first cavity 3, a second cavity 4, and a sound cavity channel 5, wherein the first sound cavity includes the first cavity 3, the sound cavity channel 5, and the second cavity 4 that are connected in sequence. At least two inflation channels 111 and at least one suction channel 112 are provided on the housing 1. The first cavity 3 and the second cavity 4 are respectively connected to at least one inflation channel 111, and the suction channel is connected to the sound cavity channel. When filling the first sound cavity with acoustic filling material, acoustic filling material (such as bass powder) is provided in the two inflation channels 111, and the acoustic filling material is poured into the first cavity 3 and the second cavity 4 through positive pressure inflation. At the same time, the suction channel 112 uses negative pressure suction to guide the acoustic filling material to fill more quickly into the sound cavity channel 5 of the rear cavity, thereby effectively improving the filling efficiency and filling quality (more uniform distribution) of the acoustic filling material, making the filling of the acoustic filling material in the rear cavity easier, especially helping to improve the filling efficiency of a micro speaker with a relatively narrow channel in the rear cavity.

[0030] Furthermore, in the micro speaker of the present utility model, the sound cavity channel 5 extends along the length direction of the housing 1.

[0031] In actual use, since the sound cavity channel 5 is a narrow channel, by providing the suction channel 112 above the sound cavity channel 5, when filling acoustic filling materials such as bass powder, by using negative pressure suction in the suction channel 112, it helps to improve the filling efficiency of the sound cavity channel 5 of the rear cavity. It should be noted that the cross-sectional shape of the sound cavity channel 5 in the vertical height direction is a long slit shape.

[0032] Furthermore, in the micro speaker of the present utility model, the housing 1 includes a cover plate 11 and a base 12, and the cover plate 11 is disposed on the base 12.

[0033] As can be seen from the above description, by providing the corresponding cover plate 11 and base 12 to enclose and form the housing 1, it is convenient to dispose the speaker unit 2 in the housing 1.

[0034] Furthermore, in the micro speaker of the present utility model, both the inflation channel 111 and the suction channel 112 are provided on the cover plate 11.

[0035] Furthermore, in the micro speaker of the present utility model, a groove with an opening facing the cover plate 11 is provided in the base 12, and the speaker unit 2 is disposed in the groove.

[0036] As can be seen from the above description, by providing a groove with a corresponding shape in the base 12 and disposing the speaker unit 2 at a corresponding position in the groove, a corresponding sound cavity can be formed.

[0037] Further, in the micro speaker of the present utility model, the inflation channel 111 at least includes a first sub-channel and a second sub-channel that are connected and coaxially arranged, wherein the first sub-channel is connected to the first cavity 3. It should be noted that the cross-sectional diameter of the first sub-channel is smaller than the cross-sectional diameter of the second sub-channel.

[0038] As can be seen from the above description, a first sub-channel and a second sub-channel that are connected and coaxially arranged are provided in the inflation channel 111, and the cross-sectional diameter of the first sub-channel is smaller than the cross-sectional diameter of the second sub-channel, so that the structure of the inflation channel 111 is a stepped hole, so as to provide a first mesh 6 in the inflation channel 111, so that the first mesh 6 does not need to protrude from the outer surface of the housing 1, thereby reducing the risk of the first mesh 6 being damaged or the first mesh 6 detaching from the housing caused by an external object impacting the first mesh 6, which helps to improve the structural stability of the micro speaker.

[0039] Further, in the micro speaker of the present utility model, it further includes a first mesh 6, and the first mesh 6 covers the opening of the first sub-channel away from the first cavity 3.

[0040] As can be seen from the above description, covering the first mesh 6 on the opening of the first sub-channel can prevent the acoustic filling material in the rear cavity of the micro speaker from leaking out through the first sub-channel, which is beneficial to ensuring the structural stability of the micro speaker.

[0041] Further, in the micro speaker of the present utility model, the suction channel 112 at least includes a third sub-channel and a fourth sub-channel that are connected and coaxially arranged, wherein the third sub-channel is connected to the sound cavity channel 5. It should be noted that the cross-sectional diameter of the third sub-channel is smaller than the cross-sectional diameter of the fourth sub-channel.

[0042] As can be seen from the above description, a third sub-channel and a fourth sub-channel that are connected and coaxially arranged are provided in the suction channel 112, and the cross-sectional diameter of the third sub-channel is smaller than the cross-sectional diameter of the fourth sub-channel, so that the structure of the suction channel 112 is a stepped hole, so as to provide a second mesh 7 in the suction channel 112, so that the second mesh 7 does not need to protrude from the outer surface of the housing 1, thereby reducing the risk of the second mesh 7 being damaged or the second mesh 7 detaching from the housing caused by an external object impacting the second mesh 7, which is beneficial to improving the structural stability of the micro speaker.

[0043] Further, in the micro speaker of the present utility model, a second mesh 7 is further included, and the second mesh 7 covers the opening of the third sub-channel away from the sound cavity channel 5.

[0044] As can be seen from the above description, covering the opening of the third sub-channel with the second mesh 7 can prevent the acoustic filling material in the rear cavity of the micro speaker from leaking out through the third sub-channel, which is beneficial to ensuring the structural stability of the micro speaker.

[0045] Correspondingly, the present utility model provides an electronic device, which includes the micro speaker as described above.

[0046] Please refer to Figures 1 to 4 , Embodiment 1 of the present utility model is: a micro speaker, which includes a housing 1 and a speaker unit 2. The speaker unit 2 is disposed in the accommodation space inside the housing 1. The housing 1 includes a cover plate 11 and a base 12, and the cover plate 11 is disposed on the base 12. The base 12 is provided with a groove with an opening facing the cover plate 11, and the cover plate 11 covers the groove to enclose the accommodation space.

[0047] In this embodiment, the speaker unit 2 is disposed in the groove (i.e., the accommodation space). The speaker unit 2 divides the remaining accommodation space in the housing 1 into a front cavity (i.e., the second sound cavity) and a rear cavity (i.e., the first sound cavity). As Figure 4 shown, the rear cavity includes a first cavity 3, a second cavity 4, and a sound cavity channel 5. The two ends of the sound cavity channel 5 are respectively communicated with the first cavity 3 and the second cavity 4. Among them, the shape of the first cavity 3 is similar to a cube, the second cavity 4 is an irregular cavity, the sound cavity channel 5 extends along the horizontal length direction of the housing 1, and the cross-sectional shape of the sound cavity channel 5 in the vertical height direction is a long strip-shaped gap. As Figure 2 shown, two inflation channels 111 and one suction channel 112 are opened on the cover plate 11. The inflation channels 111 and the suction channel 112 are both circular holes. One of the inflation channels 111 is communicated with the first cavity 3, the other inflation channel 111 is communicated with the second cavity 4, the suction channel 112 is communicated with the sound cavity channel 5, and the suction channel 112 is disposed at the middle position of the sound cavity channel 5 extending along the horizontal length direction.

[0048] In addition, the above-mentioned inflation channel 111 includes a first sub-channel and a second sub-channel that are communicated with each other and coaxially disposed. Among them, the first sub-channel is communicated with the first cavity 3. The diameter of the first sub-channel is smaller than the diameter of the second sub-channel, and at least part of the cross-section of the second sub-channel at the end away from the first sub-channel gradually increases upward along the vertical height direction. Since the diameter of the first sub-channel is smaller than the diameter of the second sub-channel, the inflation channel 111 can be regarded as a stepped hole. As Figure 3As shown in the figure, a first mesh cloth 6 is provided in the second sub-channel. The cross-sectional shape of the first mesh cloth 6 is circular, and the cross-sectional diameter of the first mesh cloth 6 is smaller than the cross-sectional diameter of the second sub-channel and larger than the cross-sectional diameter of the first sub-channel. The first mesh cloth 6 covers the opening of the first sub-channel away from the first cavity 3. Similarly, the air suction channel 112 also includes a third sub-channel and a fourth sub-channel that are connected and coaxially arranged. Among them, the third sub-channel is connected to the sound cavity channel 5. The diameter of the third sub-channel is smaller than the diameter of the fourth sub-channel, and at least part of the cross-section of the fourth sub-channel at the end away from the third sub-channel gradually increases along the vertical height direction. Since the diameter of the third sub-channel is smaller than the diameter of the fourth sub-channel, the air suction channel 112 can be regarded as a stepped hole. A second mesh cloth 7 is provided in the fourth sub-channel. The cross-sectional shape of the second mesh cloth 7 is circular, and the cross-sectional diameter of the second mesh cloth 7 is smaller than the cross-sectional diameter of the fourth sub-channel and larger than the cross-sectional diameter of the third sub-channel. The second mesh cloth 7 covers the opening of the third sub-channel away from the sound cavity channel 5.

[0049] In summary, the micro speaker provided by the present invention: adds three filling ports, two of which are filled with bass powder and filled into the rear cavity by positive pressure inflation, and the other uses negative pressure suction to guide the bass powder to fill the product faster. The present invention has a more obvious improvement for the rear cavity of the micro speaker with a narrow channel and the need to fill bass powder, is easier to fill bass powder, greatly improves the powder filling efficiency, saves the filling time, and the acoustic filling material is more evenly distributed in the rear cavity, and the yield of acoustic performance is higher.

[0050] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the related technical field, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A micro speaker, characterized in that, It includes a housing and a speaker unit. The speaker unit is disposed within the housing and divides the inner cavity of the housing into a first sound cavity and a second sound cavity. The first sound cavity includes a first cavity, a second cavity, and a sound cavity channel. The two ends of the sound cavity channel are respectively in communication with the first cavity and the second cavity. The housing is provided with at least two inflation channels and at least one suction channel. The first cavity and the second cavity are respectively in communication with at least one of the inflation channels. The suction channel is in communication with the sound cavity channel.

2. The micro speaker according to claim 1, characterized in that, The sound cavity channel extends along the length direction of the housing.

3. The micro-speaker according to claim 1, wherein The housing includes a cover plate and a base, and the cover plate is disposed on the base.

4. The micro speaker according to claim 3, characterized in that, Both the inflation channels and the suction channel are disposed on the cover plate.

5. The micro-speaker according to claim 3, characterized in that, A groove with an opening facing the cover plate is provided in the base, and the speaker unit is disposed in the groove.

6. The micro speaker according to claim 1, characterized in that, The inflation channel includes a first sub-channel and a second sub-channel that are in communication with each other and coaxially arranged. Among them, the first sub-channel is in communication with the first cavity.

7. The micro speaker according to claim 6, characterized in that, It further includes a first mesh cloth, and the first mesh cloth covers the opening of the first sub-channel away from the first cavity.

8. The micro speaker according to claim 1, characterized in that, The suction channel includes a third sub-channel and a fourth sub-channel that are in communication with each other and coaxially arranged. Among them, the third sub-channel is in communication with the sound cavity channel.

9. The micro speaker according to claim 8, characterized in that, It further includes a second mesh cloth, and the second mesh cloth covers the opening of the third sub-channel away from the sound cavity channel.

10. An electronic device, characterized in that, It includes the micro speaker according to any one of claims 1-9.

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