Sound box

Abstract

The utility model discloses a sound box, which comprises a loudspeaker unit and a box body with an opening, the loudspeaker unit is installed at the opening of the box body, an inner cavity of the box body is a rear cavity of the sound box, the box body is provided with a telescopic expansion structure relative to the outer surface of the box body, and the expansion structure is provided with a chamber communicated with the rear cavity. The sound box is simple and novel in structure, when the sound box works, the volume of the rear cavity of the sound box can be increased by utilizing the capacity expansion structure, so that the low-frequency sound effect of the sound box is improved, and when the sound box is carried, a user can store the capacity expansion structure, so that the portability of the sound box is prevented from being influenced by the arrangement of the capacity expansion structure.

Description

Technical Field

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

[0002] A speaker includes a speaker unit and a box body with an opening. The speaker unit is installed at the opening of the box body. The inner cavity of the box body is the rear cavity of the speaker. In the prior art, the volume of the rear cavity of the speaker is fixed. To improve the portability of the speaker, the volume of the speaker is generally made relatively small, which results in a very limited total volume of the rear cavity. Therefore, the existing portable speakers generally have the problem of poor low-frequency effect. Content of the Utility Model

[0003] The technical problem solved by the utility model is to provide a speaker with good low-frequency sound effect.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a speaker, including a speaker unit and a box body with an opening, the speaker unit is installed at the opening of the box body, the inner cavity of the box body is the rear cavity of the speaker, and the box body is provided with an expandable structure that can be telescoped relative to the outer surface of the box body. The expandable structure has a chamber communicating with the rear cavity.

[0005] In one embodiment, the expandable structure is provided with an air vent.

[0006] In one embodiment, the expandable structure includes a rigid pipe body. The box body has a through hole for the rigid pipe body to penetrate. The box body is provided with a first limiting portion and a second limiting portion for limiting the rigid pipe body. When the rigid pipe body abuts against the first limiting portion, the rigid pipe body is in a first extreme position. When the rigid pipe body abuts against the second limiting portion, the rigid pipe body is in a second extreme position.

[0007] In one embodiment, a sealing gasket is provided at the through hole, and the rigid pipe body can be slidably sleeved inside the sealing gasket.

[0008] In one embodiment, the box body includes a bottom shell and an upper cover connected to each other, and the through hole is provided at the connection between the bottom shell and the upper cover.

[0009] In one embodiment, the rigid pipe body is in a polyhedron shape or a cylindrical shape.

[0010] In one embodiment, the expandable structure further includes an extension pipe body that can be slidably arranged inside the rigid pipe body. One end of the rigid pipe body away from the speaker unit has an outlet for the extension pipe body to extend out.

[0011] In one embodiment, a third limiting portion for limiting the extension pipe body is provided inside the rigid pipe body.

[0012] In one embodiment, the volume expansion structure includes a telescopic tube and an end plate. A window is provided on the box body. One end of the telescopic tube is butt-connected and communicated with the window and is hermetically connected to the box body, and the other end of the telescopic tube is hermetically connected to the end plate.

[0013] In one embodiment, the box body includes a bottom shell and an upper cover connected to each other. A mounting pit is concavely formed at a corner of the bottom shell, and the window is located on a wall surface of the mounting pit.

[0014] The beneficial effects of the present utility model are as follows: The structure of the present speaker is simple and novel. When the speaker works, the volume expansion structure can be used to increase the volume of the rear cavity of the speaker, thereby improving the low-frequency sound effect of the speaker. When carrying the speaker, the user can store the volume expansion structure, thereby avoiding the influence of the setting of the volume expansion structure on the portability of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0016] Figure 1 is a schematic structural diagram of the speaker according to Embodiment 1 of the present utility model;

[0017] Figure 2 is a cross-sectional view of the speaker according to Embodiment 1 of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the speaker according to Embodiment 2 of the present utility model;

[0019] Figure 4 is a cross-sectional view of the speaker according to Embodiment 2 of the present utility model;

[0020] Figure 5 is a schematic structural diagram of the speaker according to Embodiment 3 of the present utility model;

[0021] Figure 6 is a cross-sectional view of the speaker according to Embodiment 3 of the present utility model;

[0022] Figure 7 is a schematic structural diagram of the speaker according to Embodiment 4 of the present utility model;

[0023] Figure 8 is a cross-sectional view of the speaker according to Embodiment 4 of the present utility model;

[0024] Figure 9Schematic diagram of the structure of the speaker in Embodiment 5 of the present utility model (when the rigid pipe body does not protrude);

[0025] Figure 10 Schematic diagram of the structure of the speaker in Embodiment 5 of the present utility model (when the rigid pipe body protrudes).

[0026] Explanation of the reference numerals in the drawings:

[0027] 1. Speaker unit;

[0028] 2. Cabinet; 21. Contact block; 22. Bottom shell; 23. Upper cover; 24. Installation pit;

[0029] 3. Rear cavity;

[0030] 4. Expansion structure; 41. Air vent; 42. Rigid pipe body; 421. Skirt; 422. Slide groove; 43. Extension pipe body; 44. Telescopic pipe; 45. End plate;

[0031] 5. Sealing gasket. Detailed implementation manners

[0032] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings.

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0034] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0036] In addition, the meaning of "and / or" as used throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution of, or the solution of, or the solution that satisfies both simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or is unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0037] In this application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Embodiment 1

[0039] Please refer to Figure 1 and Figure 2 , Embodiment 1 of this utility model is: a speaker, including a speaker unit 1 and a box body 2 with an opening. The speaker unit 1 is installed at the opening of the box body 2. The inner cavity of the box body 2 is the rear cavity 3 of the speaker. The box body 2 is provided with an expandable structure 4 that can be telescoped relative to the outer surface of the box body 2. The expandable structure 4 has a chamber communicating with the rear cavity 3. When the expandable structure 4 is in different telescopic degrees, the total volume of the rear cavity 3 of the speaker is different.

[0040] To improve the low-frequency sound effect of the speaker to a greater extent, the expandable structure 4 is provided with a vent hole 41, and the size of the vent hole 41 can be set according to actual needs.

[0041] In this embodiment, the expandable structure 4 includes a rigid tube body 42. The box body 2 has a through hole for the rigid tube body 42 to pass through. The box body 2 is provided with a first limiting part and a second limiting part for limiting the rigid tube body 42. When the rigid tube body 42 abuts against the first limiting part, the rigid tube body 42 is in the first extreme position. When the rigid tube body 42 abuts against the second limiting part, the rigid tube body 42 is in the second extreme position.

[0042] Specifically, the first limiting portion is a contact block 21 provided on the inner surface of the box body 2. When the end of the rigid pipe body 42 located in the rear cavity 3 contacts the contact block 21, the total volume of the rear cavity 3 is in the minimum state; the second limiting portion is the edge of the through hole. When the rigid pipe body 42 contacts the second limiting portion, the total volume of the rear cavity 3 is in the maximum state. For the convenience of user operation, preferably, when the rigid pipe body 42 is in the first extreme position, the end of the rigid pipe body 42 away from the horn unit 1 is exposed outside the box body 2, so as to facilitate the user to pull the rigid pipe body 42.

[0043] In this embodiment, one end of the rigid pipe body 42 located in the rear cavity 3 has a skirt 421, and the skirt 421 cooperates with the first limiting portion and the second limiting portion.

[0044] To improve the airtightness of the speaker and improve the phenomenon of gas entering and leaving the rear cavity 3 through the through hole, preferably, a sealing gasket 5 is provided at the through hole. The rigid pipe body 42 can be slidably sleeved in the sealing gasket 5, and the material of the sealing gasket 5 can be silicone, Teflon, etc.

[0045] It should be noted that after the sealing gasket 5 is provided, the second limiting portion is transferred to the sealing gasket 5, or, it can also be considered that the second limiting portion on the box body 2 indirectly contacts the rigid pipe body 42 in the second extreme position through the sealing gasket 5.

[0046] The box body 2 includes a bottom shell 22 and an upper cover 23 connected to each other. Preferably, the through hole is provided at the connection between the bottom shell 22 and the upper cover 23, which can facilitate the assembly of the sealing gasket 5. Specifically, the through hole can be entirely located on the upper cover 23, or entirely located on the bottom shell 22, or a part of the area is located on the upper cover 23 and another part of the area is located on the bottom shell 22.

[0047] The rigid pipe body 42 is in the shape of a polyhedron. In this embodiment, the rigid pipe body 42 is in the shape of a rectangular body. In other embodiments, the rigid pipe body 42 can also be in the shape of a triangular prism, a pentagonal prism, etc., and can be specifically set according to actual situations.

[0048] Embodiment Two

[0049] Please refer to Figure 3 and Figure 4 , Embodiment Two of the present utility model is an alternative technical solution to Embodiment One. The difference from Embodiment One is that: the rigid pipe body 42 is in the shape of a cylinder.

[0050] Embodiment Three

[0051] Please refer to Figure 5 and Figure 6 Embodiment 3 of the present invention is a further improvement on the expansion structure 4 based on embodiment 1, and is different from embodiment 1 in that: the expansion structure 4 also includes an extension tube body 43 slidably arranged in the hard tube body 42, and the end of the hard tube body 42 away from the speaker unit 1 has an extension port for the extension tube body 43 to extend out. The existence of the extension tube body 43 can increase the volume upper limit of the cavity of the expansion structure 4, thereby increasing the rear cavity 3 of the speaker to a greater extent, thereby improving the low-frequency sound effect of the speaker to a greater extent.

[0052] In order to prevent the extension tube 43 from being separated from the hard tube 42, a third limiting portion for limiting the extension tube 43 is provided in the hard tube 42. In this embodiment, the inner wall of the hard tube 42 has a slide groove 422 arranged along the expansion direction of the expansion structure 4, one end of the slide groove 422 is connected to the end surface of the end of the hard tube 42 located in the rear cavity 3, and the other end of the slide groove 422 is not connected to the other end surface of the hard tube 42, thereby forming the third limiting portion. More specifically, the extension tube 43 has a slider extending into the slide groove 422, and the slider can slide along the slide groove 422.

[0053] Embodiment 4

[0054] Please refer to Figure 7 and Figure 8 Embodiment 4 of the present utility model is a parallel technical solution of embodiment 1, and is different from embodiment 1 in that the structure of the expansion structure is different, specifically: a speaker box, comprising a speaker unit 1 and a box body 2 with an opening, the speaker unit 1 is installed at the opening of the box body 2, the inner cavity of the box body 2 is the rear cavity 3 of the speaker box, the box body 2 is provided with an expansion structure 4 which is retractable relative to the outer surface of the box body 2, the expansion structure 4 has a cavity connected to the rear cavity 3, and when the expansion structure 4 is in different degrees of expansion, the total volume of the rear cavity 3 of the speaker box is different.

[0055] The expansion structure 4 includes a telescopic tube 44 and an end plate 45 . The box body 2 is provided with a window. One end of the telescopic tube 44 is connected to the window and sealed to the box body 2 . The other end of the telescopic tube 44 is sealed to the end plate 45 .

[0056] Optionally, an air leakage hole is provided on the end plate 45 .

[0057] To protect the expansion structure 4, in this embodiment, the box body 2 includes a bottom shell 22 and an upper cover 23 connected to each other. A mounting pit 24 is recessed at a corner of the bottom shell 22, and the window is located on a wall surface of the mounting pit 24. When the rear cavity 3 is in the state with the smallest total volume, the entire area of the expansion structure 4 is located within the mounting pit 24.

[0058] Embodiment Five

[0059] Please refer to Figure 9 and Figure 10 , Embodiment Five of the present utility model is a further improvement made on the basis of Embodiment One. The difference from Embodiment One lies in that the number of the expansion structures 4 is multiple.

[0060] In this embodiment, the number of the expansion structures 4 is two. After the rigid pipe bodies 42 of the two expansion structures 4 extend out, the ends of the two rigid pipe bodies 42 approach each other to form a handle structure convenient for carrying by hand. Specifically, the rigid pipe body 42 is generally in an L shape.

[0061] The above are only optional embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A speaker, characterized in that: The speaker unit comprises a speaker unit and a box with an opening, wherein the speaker unit is installed at the opening of the box, the inner cavity of the box is the back cavity of the speaker, and the box is provided with a retractable expansion structure relative to the outer surface of the box, and the expansion structure has a cavity connected to the back cavity.

2. The speaker according to claim 1, characterized in that: The expansion structure is provided with an air leakage hole.

3. The speaker according to claim 1, characterized in that: The expansion structure includes a hard tube body, the box body has a through opening for the hard tube body to pass through, and the box body is provided with a first limiting portion and a second limiting portion for limiting the hard tube body. When the hard tube body conflicts with the first limiting portion, the hard tube body is in a first extreme position, and when the hard tube body conflicts with the second limiting portion, the hard tube body is in a second extreme position.

4. The speaker according to claim 3, characterized in that: A sealing gasket is provided at the through opening, and the hard tube body can be slidably sleeved in the sealing gasket.

5. The speaker according to claim 4, characterized in that: The box body comprises a bottom shell and an upper cover which are connected to each other, and the through opening is arranged at the connection between the bottom shell and the upper cover.

6. The speaker according to claim 3, characterized in that: The hard tube body is in a polyhedral or cylindrical shape.

7. The speaker according to claim 3, characterized in that: The expansion structure also includes an extension tube body slidably arranged in the hard tube body, and one end of the hard tube body away from the speaker unit is provided with an extension opening for the extension tube body to extend out.

8. The speaker according to claim 7, characterized in that: The hard tube body is provided with a third limiting portion for limiting the position of the extension tube body.

9. The speaker according to claim 1, characterized in that: The expansion structure includes a telescopic tube and an end plate. The box body is provided with a window. One end of the telescopic tube is connected to the window and sealed to the box body. The other end of the telescopic tube is sealed to the end plate.

10. The speaker according to claim 9, characterized in that: The box body comprises a bottom shell and an upper cover connected to each other. A corner of the bottom shell is concave to form an installation pit, and the window is located on a wall surface of the installation pit.

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