Projector sound cavity structure

Abstract

The projector sound cavity structure comprises a lower shell, a wind pipe piece, an upper shell, a first loudspeaker and a second loudspeaker, the left portion and the right portion in the lower shell are provided with a first cavity and a second cavity respectively, the left side of the first cavity is provided with a first loudspeaker lower notch, the right side of the first cavity is provided with a second loudspeaker lower notch, and the middle portion in the lower shell is provided with a first positioning block. A first cavity is formed in the lower shell, a plurality of first positioning columns are arranged in the first cavity, a first extending part is arranged on the rear side of the lower shell, a second positioning block is arranged on the left side in the first extending part, and a first protruding edge and a second protruding edge are arranged on the front side and the rear side of the first extending part respectively. A third protruding edge and a fourth protruding edge are arranged on the left side and the right side of the air duct piece respectively, a first positioning notch is formed in the first positioning part, and a second positioning notch is formed in the second positioning part. The air duct piece positioning device has the advantages of facilitating air duct piece positioning, effectively preventing air duct piece dislocation, reducing vibration sound and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of sound cavity of electronic equipment, and in particular relates to a sound cavity structure of a projector. Background Art

[0002] Projectors are already widely used in daily life. The sound cavity structure of a projector is one of its key components. The sound cavity structure has the functions of shaping the sound wave propagation path, adjusting the frequency characteristics of the sound, enhancing the sound loudness, reducing sound distortion, and improving the timbre performance. The demand trend of the existing projector sound cavity structure is to achieve better low-frequency playback effects, that is, a sufficiently low resonant frequency is required, low low-frequency and mid-high frequency distortion, and a sufficiently good mid-high frequency playback effect, with purer and clearer sound quality. In order to achieve such an effect, structures such as air ducts are generally set in the projector sound cavity structure. The air ducts have the advantages of optimizing the air flow path, controlling the air flow, adjusting the resonance frequency, and reducing acoustic reflection interference. However, the air ducts are easily misaligned during assembly, which affects the overall use of the projector sound cavity structure. Utility Model Content

[0003] In order to solve the deficiencies in the prior art, the utility model provides a projector sound cavity structure which is convenient for positioning air duct pieces and is not easily misplaced.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The projector sound cavity structure includes a lower shell, an air duct sheet, an upper shell, a first speaker and a second speaker, the left and right parts of the lower shell are respectively provided with a first cavity and a second cavity, the left side of the first cavity is provided with a first speaker lower notch, the right side of the first cavity is provided with a second speaker lower notch, a first positioning block is provided in the middle part of the lower shell, a plurality of first positioning columns are provided in the first cavity, a first extension portion is provided on the rear side of the lower shell, a second positioning block is provided on the left side of the first extension portion, a first convex rib and a second convex rib are respectively provided on the front and rear sides of the first extension portion, the air duct sheet includes a first positioning portion, a middle portion and a second positioning portion which are bent, a third rib and a fourth rib are respectively provided on the left and right sides of the air duct sheet, a first positioning notch is provided on the first positioning portion, a second positioning notch is provided on the second positioning portion, the first positioning notch is sleeved on the first positioning block, the second positioning notch is sleeved on the second positioning block, and a plurality of first positioning columns are connected to the bottom surface of the middle portion. The first convex rib is adapted to be connected with the fourth convex rib and are arranged at the same height, the second convex rib is adapted to be connected with the third convex rib and are arranged at the same height, a second extension portion is provided on the bottom surface of the upper shell, and a fifth convex rib and a sixth convex rib are provided on the left and right sides of the second extension portion respectively, the fifth convex rib is adapted to the second and third convex ribs and are ultrasonically welded, the sixth convex rib is adapted to the first and fourth convex ribs and are ultrasonically welded, the first extension portion, the second extension portion and the air duct sheet are combined to form a gas flow channel, one end of the gas flow channel is close to the second cavity, and the other end of the gas flow channel passes through between the upper shell and the lower shell, a first speaker upper notch is provided on the left side of the upper shell, and a second speaker upper notch is provided on the right side of the upper shell, the upper shell is buckled on the lower shell, the first speaker is arranged in the first cavity and the left end portion of the first speaker is clamped between the upper notch of the first speaker and the lower notch of the first speaker, the second speaker is arranged in the second cavity and the left end portion of the second speaker is clamped between the upper notch of the second speaker and the lower notch of the second speaker

[0006] Preferably, the upper shell is provided with a plurality of second positioning columns and the upper shell is buckled on the lower shell through the plurality of second positioning columns.

[0007] Preferably, an EVA block is provided between the first speaker and the lower shell, and between the second speaker and the lower shell.

[0008] By adopting the above technical solution, the utility model has the following beneficial effects:

[0009] The utility model is provided with a first positioning block, a second positioning block, a first positioning portion and a second positioning portion, etc., which are convenient for positioning the air duct sheet, and the fifth convex rib is adapted to the second convex rib and the third convex rib and ultrasonically welded, and the sixth convex rib is adapted to the first convex rib and the fourth convex rib and ultrasonically welded, which can effectively prevent the air duct sheet from being misplaced, and the positioning of the air duct sheet can also effectively reduce vibration noise;

[0010] In summary, the utility model has the advantages of facilitating the positioning of the air duct segments, effectively preventing the air duct segments from being misplaced, and reducing vibration noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 yes Figure 1 Schematic diagram of the structure when the upper shell and duct sheet are removed;

[0013] Figure 3 This is a structural diagram of the air duct sheet of the utility model;

[0014] Figure 4 yes Figure 1 Schematic diagram of the structure when the upper shell is removed;

[0015] Figure 5 It is a structural schematic diagram of the upper shell of the utility model. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0018] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0021] Example 1

[0022] In this embodiment, a sound cavity structure of a projector is proposed, which can prevent the air duct blades from being dislocated and contracted, and can effectively reduce vibration sound.

[0023] like Figure 1-5 As shown, in one embodiment of the present invention, the projector sound cavity structure of the present invention includes a lower shell 1, an air duct sheet 2, an upper shell 3, a first speaker 4 and a second speaker 5. The left and right parts of the lower shell 1 are respectively provided with a first cavity 6 and a second cavity 7. The left side of the first cavity 6 is provided with a first speaker lower notch, and the right side of the first cavity 6 is provided with a second speaker lower notch. The lower shell 1 as a whole is roughly similar to an inverted U shape.

[0024] A first positioning block 11 is provided in the middle of the lower shell 1, a plurality of first positioning columns 12 are provided in the first cavity 6, a first extension portion 13 is provided on the rear side of the lower shell 1, a second positioning block 14 is provided on the left side of the first extension portion 13, a first convex rib 131 and a second convex rib 132 are provided on the front and rear sides of the first extension portion 13 respectively, the air duct sheet 2 includes a first positioning portion 21, a middle portion 22 and a second positioning portion 23 which are bent, a third convex rib 24 and a fourth convex rib 25 are provided on the left and right sides of the air duct sheet 2 respectively, a first positioning notch 211 is provided on the first positioning portion 21, and a second positioning notch 231 is provided on the second positioning portion 23. The first positioning notch 211 is sleeved on the first positioning block 11, and the second positioning notch 231 is sleeved on the second positioning block 14. A plurality of first positioning columns 12 are connected to the bottom surface of the middle portion 22. Specifically, the right side of the first positioning notch 211 on the air duct sheet 2 is a first rib. The right side of the second positioning notch 231 of the pipe sheet 2 is a second convex rib, the first positioning block 11 is similar to a trapezoid, and the second positioning block 14 is similar to a fan. There is a groove around the edges of the first positioning block 11 and the second positioning block 14. The first positioning block 11 is inserted into the first positioning notch 211, and the second positioning block 14 is inserted into the second positioning notch 231. Glue is filled between the first positioning block 11 and the first notch, and between the second positioning block 14 and the second positioning notch 231, so as to facilitate subsequent ultrasonic welding. The provision of the first convex rib and the second convex rib can prevent the air duct sheet 2 from being misaligned and deformed to a certain extent. The top surfaces of the first positioning block 11 and the second positioning block 14 are at the same height as the groove wall in the air duct sheet 2, that is, after the first positioning block 11 is inserted into the first positioning notch 211, it is at the same height as the groove wall in the air duct sheet 2, and after the second positioning block 14 is inserted into the second positioning notch 231, it is at the same height as the groove wall in the air duct sheet 2;

[0025] The first rib 131 of the present invention is adapted to be connected with the fourth rib 25 and are arranged at the same height, the second rib 132 is adapted to be connected with the third rib 24 and are arranged at the same height, the bottom surface of the upper shell 3 is provided with a second extension portion 31, and the left and right sides of the second extension portion 31 are respectively provided with a fifth rib 33 and a sixth rib 34, the fifth rib 33 is adapted to the second rib 132 and the third rib 24 and are ultrasonically welded, the sixth rib 34 is adapted to the first rib 131 and the fourth rib 25 and are ultrasonically welded, the first extension portion 13, the second extension portion 31 and the air duct sheet 2 are enclosed to form a gas flow channel, one end of the gas flow channel is close to the second cavity 7, and the other end of the gas flow channel passes through between the upper shell 3 and the lower shell 1;

[0026] A first speaker upper notch is provided on the left side of the upper shell 3, a second speaker upper notch is provided on the right side of the upper shell 3, the upper shell 3 is buckled on the lower shell 1, a plurality of second positioning columns 32 are provided on the upper shell 3 and the upper shell 3 is buckled on the lower shell 1 through the plurality of second positioning columns 32, the first speaker 4 is arranged in the first cavity 6 and the left end of the first speaker 4 is clamped between the first speaker upper notch and the first speaker lower notch, the second speaker 5 is arranged in the second cavity 7 and the left end of the second speaker 5 is clamped between the second speaker upper notch and the second speaker lower notch, and EVA blocks are provided between the first speaker 4 and the lower shell 1 and between the second speaker 5 and the lower shell 1.

[0027] The utility model can prevent the air duct sheet 2 from being dislocated and deformed as a whole, and the air duct sheet 2 is combined with the upper shell 3 and the lower shell 1 to form a gas flow channel. The edge improves the sound quality, the overall vibration is small, and it is suitable for use on a projector.

[0028] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the scope of protection of the technical solution of the utility model.

Claims

1. The projector sound cavity structure is characterized by: The cam is secured to the bottom of the housing, and the cam is secured to the bottom of the housing by a secure connection between the housing and the cam. The cam is secured to the bottom of the housing, and the cam is secured to the bottom of the housing by a secure connection between the housing and the cam. The ribs are adapted to be connected with the fourth ribs and are arranged at the same height, the second ribs are adapted to be connected with the third ribs and are arranged at the same height, a second extension portion is provided on the bottom surface of the upper shell, and a fifth rib and a sixth rib are provided on the left and right sides of the second extension portion respectively, the fifth rib is adapted to the second and third ribs and are ultrasonically welded, the sixth rib is adapted to the first and fourth ribs and are ultrasonically welded, the first extension portion, the second extension and the air duct sheet are combined to form a gas flow channel, one end of the gas flow channel is close to the second cavity, and the other end of the gas flow channel passes through between the upper shell and the lower shell, a first speaker upper notch is provided on the left side of the upper shell, a second speaker upper notch is provided on the right side of the upper shell, the upper shell is buckled on the lower shell, the first speaker is arranged in the first cavity and the left end portion of the first speaker is clamped between the upper notch of the first speaker and the lower notch of the first speaker, the second speaker is arranged in the second cavity and the left end portion of the second speaker is clamped between the upper notch of the second speaker and the lower notch of the second speaker 2. The projector sound cavity structure according to claim 1, characterized in that: The upper shell is provided with a plurality of second positioning columns and the upper shell is buckled on the lower shell through the plurality of second positioning columns.

3. The projector sound cavity structure according to claim 1, characterized in that: An EVA block is provided between the first speaker and the lower shell, and between the second speaker and the lower shell.

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