Loudspeaker module and projection device

Abstract

The present application provides a loudspeaker module and a projection device. The loudspeaker module comprises: a housing, a sound production module being arranged in the housing, and the housing being provided with connecting columns; elastic connecting members, each elastic connecting member having an axial direction and being provided with a connecting hole extending in the axial direction, the connecting columns fitting tightly into the connecting holes, the housing abutting against a first axial end face of each elastic connecting member, and a first protruding wall and a second protruding wall which are spaced apart in the axial direction being provided on the outer peripheral wall of each connecting column; and a fixing support, the fixing support being provided with snap portions, each snap portion being provided with a slot, the slot being fitted between the corresponding first and second protruding walls, and two opposite sides of each snap portion respectively abutting against the corresponding first and second protruding walls.

Description

Loudspeaker module and projection device TECHNICAL FIELD

[0001] The present application relates to the field of projection technology, in particular to a loudspeaker module and a projection device. BACKGROUND

[0002] The projection device is a rapidly developed intelligent product in recent years, and can realize application services such as network search, network video, video on demand (VOD), digital music, network education resources, network video, etc. With the increasing demand for audio experience, the selection of loudspeakers is developing towards high power. In the working process of the loudspeaker, vibration will be generated, especially when working at low frequency, the vibration amplitude of the loudspeaker is large, which is easy to affect the light machine and cause picture jitter. TECHNICAL PROBLEM

[0003] The embodiments of the present application provide a loudspeaker module and a projection device, aiming to solve the technical problem of loudspeaker vibration. TECHNICAL SOLUTION

[0004] The technical scheme of the present application is as follows:

[0005] A loudspeaker module comprises:

[0006] a sound generating module;

[0007] a shell, wherein the sound generating module is arranged in the shell; the shell is provided with a connecting column;

[0008] an elastic connecting piece, wherein the elastic connecting piece has an axial direction; the elastic connecting piece is provided with a connecting hole extending along the axial direction; the connecting column is tightly matched with the connecting hole, and the shell is abutted with a first axial end surface of the elastic connecting piece; a first protruding wall and a second protruding wall are arranged on an outer peripheral wall of the connecting column and spaced apart along the axial direction; and

[0009] a fixing support, wherein the fixing support is provided with a clamping portion, the clamping portion is provided with a clamping groove, the clamping groove is clamped between the first protruding wall and the second protruding wall and tightly contacts with the outer peripheral wall; and the clamping portion is respectively abutted with the first protruding wall and the second protruding wall on opposite sides.

[0010] The loudspeaker module, wherein a vertical bone is protruded on a hole wall of the connecting hole; the connecting column is tightly contacted with the vertical bone.

[0011] The loudspeaker module, wherein the vertical bone has a plurality of vertical bones, and the plurality of vertical bones are spaced apart along a circumferential direction of the elastic connecting piece.

[0012] The loudspeaker module, wherein a cross-sectional shape of the vertical bone is semicircular, circular, triangular or quadrangular.

[0013] The loudspeaker module, wherein the first axial end face is provided with a first transverse bone extending along the radial direction of the elastic connecting piece.

[0014] The shell is in close contact with the first transverse bone.

[0015] The loudspeaker module, wherein the first transverse bone has a plurality of first transverse bones, and the plurality of first transverse bones are arranged at intervals along the circumferential direction of the elastic connecting piece.

[0016] The loudspeaker module, wherein the first transverse bone has a cross-sectional shape of a semicircle, a circle, a triangle, or a quadrilateral.

[0017] The loudspeaker module, wherein the elastic connecting piece further has at least one third protruding wall arranged on the outer peripheral wall and spaced apart from the first protruding wall and the second protruding wall along the axial direction.

[0018] The loudspeaker module, wherein the first protruding wall and the second protruding wall are arranged close to the middle part of the elastic connecting piece.

[0019] The loudspeaker module, wherein the clamping portion is provided with a notch in communication with the clamping groove, the notch being used for clamping the elastic connecting piece into the clamping groove; and the width of the notch is smaller than the diameter of the elastic connecting piece.

[0020] The loudspeaker module, wherein the number of the connecting columns is a plurality, and the plurality of connecting columns are arranged at intervals on the shell; and the number of the elastic connecting pieces is consistent with the number of the connecting columns.

[0021] The number of the clamping portions is a plurality, and the number of the clamping portions is consistent with the number of the connecting columns; and the plurality of clamping portions are arranged at intervals on the fixed support.

[0022] The connecting column, the elastic connecting piece, and the clamping portion are matched one by one.

[0023] The loudspeaker module, wherein the elastic connecting piece further has a second axial end face arranged opposite to the first axial end face along the axial direction.

[0024] The elastic connecting piece further has a second transverse bone arranged on the second axial end face and extending along the radial direction of the elastic connecting piece.

[0025] The loudspeaker module, wherein the connecting column has a threaded segment; and the loudspeaker module further comprises a threaded fastener screw-coupled with the threaded segment.

[0026] The loudspeaker module, wherein the threaded fastener abuts against a side of the elastic connecting piece away from the shell.

[0027] The application also provides a projection device, comprising:

[0028] a shell; and

[0029] The loudspeaker module as described above is arranged in the outer shell. Advantages

[0030] Compared with the prior art, the application has the following advantages:

[0031] In the technical scheme of the application, the sound emitting module is placed in the shell to emit sound to the outside. The connecting column is arranged on the shell and tightly matches the axially extending connecting hole of the elastic connecting piece to realize the connection between the shell and the elastic connecting piece. The first and second protruding walls are arranged on the outer peripheral wall of the elastic connecting piece. The clamping groove on the clamping part of the fixing support is clamped between the first and second protruding walls and tightly contacts the outer peripheral wall. The opposite two sides of the clamping part also abut against the first and second protruding walls to realize the positioning of the elastic connecting piece and realize the connection between the fixing support and the shell through the elastic connecting piece. When the sound emitting module vibrates, the first and second protruding walls can absorb the axial vibration force through deformation, and the elastic connecting piece can also absorb the radial vibration force due to the tight matching between the connecting column and the connecting hole, thereby avoiding or reducing the vibration of the module from being transmitted to the outside.

[0032] When the application is applied to the projection device, the influence of vibration on the optical engine is effectively avoided, the picture shaking and blurring are effectively avoided, and the picture quality of the display device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical scheme in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments described in the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0034] Fig. 1 is an exploded schematic view of the loudspeaker module provided by the application;

[0035] Fig. 2 is a cross-sectional schematic view of the loudspeaker module provided by the application;

[0036] Fig. 3 is a local enlarged view of A in Fig. 1;

[0037] Fig. 4 is a local enlarged view at B in Fig. 2;

[0038] Fig. 5 is a perspective view of the elastic connecting piece in the loudspeaker module according to the embodiment of the application;

[0039] Fig. 6 is a sectional view of the elastic connecting piece in the loudspeaker module according to the embodiment of the application.

[0040] Wherein, 100, loudspeaker module; 110, shell; 111, connecting column; 120, elastic connecting piece; 121, first protruding wall; 122, second protruding wall; 123, first axial end face; 124, vertical bone; 125, first transverse bone; 126, third protruding wall; 127, second axial end face; 128, second transverse bone; 129, connecting hole; 130, fixing support; 131, clamping part; 1311, clamping groove; 1312, notch; 1313, second abutting face; 1314, first abutting face. Embodiment of the application

[0041] In order to make the person skilled in the art better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] In order to overcome the technical problems existing in the prior art, the embodiment of the present application provides a loudspeaker module. Fig. 1 is an exploded view of the loudspeaker module according to the embodiment of the present application; Fig. 2 is a sectional view of the loudspeaker module according to the embodiment of the present application; Fig. 3 is a local enlarged view at A in Fig. 1; Fig. 4 is a local enlarged view at B in Fig. 2. In combination with Figs. 1 to 4, the loudspeaker module 100 comprises:

[0043] a sound generating module (not shown);

[0044] a shell 110, wherein the sound generating module is arranged in the shell 110; the shell 110 is provided with a connecting column 111;

[0045] an elastic connecting piece 120, wherein the elastic connecting piece 120 has an axial direction; the elastic connecting piece 120 is provided with a connecting hole 129 extending along the axial direction; the connecting column 111 is tightly matched with the connecting hole 129, and the shell 110 is abutted with a first axial end face 123 of the elastic connecting piece 120; the outer peripheral wall of the connecting column 111 is provided with a first protruding wall 121 and a second protruding wall 122 arranged along the axial direction at intervals; and

[0046] The fixed support 130 is provided with a clamping portion 131, the clamping portion 131 is provided with a clamping groove 1311, the clamping groove 1311 is clamped between the first protruding wall 121 and the second protruding wall 122, and is in close contact with the outer peripheral wall; and the opposite two sides of the clamping portion 131 are respectively in abutment with the first protruding wall 121 and the second protruding wall 122.

[0047] In the technical scheme of the embodiment of the present application, the sound emitting module is placed in the shell 110 to emit sound to the outside. The shell 110 is provided with a connecting column 111, the connecting column 111 is in close fit with the axially extending connecting hole 129 of the elastic connecting piece 120, thereby realizing the connection between the shell 110 and the elastic connecting piece 120; the outer peripheral wall of the elastic connecting piece 120 is provided with a first protruding wall 121 and a second protruding wall 122; the clamping groove 1311 on the clamping portion 131 of the fixed support 130 is clamped between the first protruding wall 121 and the second protruding wall 122, and is in close contact with the outer peripheral wall; and the opposite two sides of the clamping portion 131 are also in abutment with the first protruding wall 121 and the second protruding wall 122, thereby realizing the positioning of the elastic connecting piece 120 and realizing the connection between the fixed support 130 and the shell 110 through the elastic connecting piece 120. When the sound emitting module vibrates, it can absorb the axial vibration force through the deformation of the first protruding wall 121 and the second protruding wall 122, and because the connecting column 111 is in close fit with the connecting hole 129, the elastic connecting piece 120 can also absorb the radial vibration force, thereby avoiding or reducing the transmission of the vibration of the sound emitting module to the outside.

[0048] Especially, in order to improve the bass frequency effect, a passive basin can be arranged on the shell 110, at this time, the vibration amplitude of the shell 110 is large, and through the axial vibration absorption and radial vibration absorption of the elastic connecting piece 120, the technical scheme of the present application can effectively avoid or reduce the transmission of the vibration of the shell 110 to the outside while effectively improving the bass frequency sound emitting effect.

[0049] When the sound emitting module is applied to a projection device, the influence of the vibration on the light machine is effectively avoided, the picture shaking and blurring are effectively avoided, and the picture quality of the display device is improved.

[0050] In the technical scheme of the present application, the sound emitting module adopts the existing technology, and its structure, sound emitting principle and the like are not improved, so they are not described in detail.

[0051] As shown in FIG. 4, the clamping part 131 is arranged on the fixed support 130, and has a block shape with a first abutting surface 1314 and a second abutting surface 1313 arranged oppositely. The clamping groove 1311 penetrates through the first abutting surface 1314 and the second abutting surface 1313, so that the elastic connecting piece 120 can be arranged in the clamping groove 1311. The first abutting surface 1314 abuts against the first protruding wall 121, the second abutting surface 1313 abuts against the second protruding wall 122, and the groove wall of the clamping groove 1311 tightly matches the outer circumferential wall of the elastic connecting piece 120, so that the clamping part 131 positions the elastic connecting piece 120.

[0052] In the technical scheme of the embodiment of the present application, the tight matching can be understood as tight fitting, that is, the connecting column 111 (the shell 110), the elastic connecting piece 120 and the fixed support 130 are fixed, and the vibration energy is absorbed by the deformation of the elastic connecting piece 120.

[0053] In some embodiments, as shown in FIG. 6, a vertical bone 124 is protruded on the hole wall of the connecting hole 129; the connecting column 111 tightly contacts with the vertical bone 124. In the embodiment, the vertical bone 124 is integrally formed on the hole wall and protruded from the hole wall, so as to tightly match the connecting column 111; the vertical bone 124 tightly contacts with the connecting column 111, and because the vertical bone 124 is protruded from the hole wall, there is a space between the hole wall and the connecting column 111, so that when the shell 110 has a transverse vibration, the vertical bone 124 can deform in the space to absorb the transverse (radial) vibration.

[0054] In the embodiment, the axial length of the vertical bone 124 is less than or equal to the axial length of the elastic connecting piece 120.

[0055] In the embodiment, the vertical bone 124 has a plurality of vertical bones 124, and the plurality of vertical bones 124 are arranged along the circumferential direction of the elastic connecting piece 120. For example, in the embodiment, the vertical bone 124 has three vertical bones 124, and the three vertical bones 124 are arranged along the circumferential direction of the elastic connecting piece 120, and the included angle between any two vertical bones 124 is 120°. For another example, in the embodiment, the vertical bone 124 has four vertical bones 124, and the four vertical bones 124 are arranged along the circumferential direction of the elastic connecting piece 120, and the included angle between adjacent two vertical bones 124 is 120°. The number of the vertical bone 124 can also be two, five or more, and the number is mainly arranged according to the power of the sound generating module, which will not be described in detail here.

[0056] In addition, in some embodiments, the plurality of vertical bones 124 are arranged along the circumferential direction and the axial direction; that is, the vertical bones 124 are arranged like a spiral.

[0057] In this embodiment, the cross-sectional shape of the vertical rib 124 is semi-circular, circular, triangular, or quadrilateral. For example, the cross-sectional shape of the vertical rib 124 is triangular or trapezoidal.

[0058] In some embodiments, a first transverse rib 125 protrudes from the first axial end face 123 and extends radially along the elastic connector 120; the housing 110 is in close contact with the first transverse rib 125. The first transverse rib 125 is disposed on the first axial end face 123 to improve the ability of the elastic connector 120 to absorb axial vibrations of the housing 110. When the sound-generating module generates axial vibrations, the housing 110 generates axial vibrations, causing the first transverse rib 125 to deform and thus absorb the axial vibrations.

[0059] In this embodiment, the first transverse bone 125 is integrally protruding on the first axial end face 123.

[0060] In one embodiment, there are multiple first transverse ribs 125, which are spaced apart circumferentially along the elastic connector 120. For example, in one embodiment, there are three transverse ribs, which are spaced apart circumferentially along the elastic connector 120, with an angle of 120° between any two transverse ribs. Alternatively, in another embodiment, there are four transverse ribs, which are spaced apart circumferentially along the elastic connector 120, with an angle of 120° between adjacent transverse ribs. The number of transverse ribs can also be two, five, or more, depending on the power of the sound-generating module, which will not be elaborated further here.

[0061] In this embodiment, the cross-sectional shape of the first transverse bone 125 is semi-circular, circular, triangular, or quadrilateral. For example, the cross-sectional shape of the first transverse bone 125 is triangular or trapezoidal.

[0062] In some embodiments, as shown in FIG5, the elastic connector 120 further has at least one third protruding wall 126, which is disposed on the outer peripheral wall and spaced apart from the first protruding wall 121 and the second protruding wall 122 along the axial direction. In this embodiment, by providing at least one third protruding wall 126, which is spaced apart from both the first protruding wall 121 and the second protruding wall 122 along the axial direction, at least one groove can be formed on the outer peripheral wall. While the first protruding wall 121 and the second protruding wall 122 abut against the locking portion 131, the presence of at least one groove increases the axial vibration absorption capacity of the elastic connector 120.

[0063] For example, in an embodiment, by providing a third protruding wall 126, which is axially spaced from the first protruding wall 121 and the second protruding wall 122, an additional groove can be formed on the outer peripheral wall. While the first protruding wall 121 and the second protruding wall 122 abut against the locking part 131, the groove is provided to increase the axial vibration absorption capacity of the elastic connector 120.

[0064] For example, in one embodiment, as shown in Figure 5, by providing two third protruding walls 126, which are axially spaced from the first protruding wall 121 and the second protruding wall 122, two additional slots can be formed on the outer peripheral wall. While the first protruding wall 121 and the second protruding wall 122 abut against the locking portion 131, the two slots increase the axial vibration absorption capacity of the elastic connector 120. In this embodiment, the two third protruding walls 126 are respectively located on the side of the first protruding wall 121 opposite to the second protruding wall 122 and on the side of the second protruding wall 122 opposite to the first protruding wall 121.

[0065] The number of third protruding walls 126 can also be three, four or more, depending on the power of the sound-generating module.

[0066] In this embodiment, as shown in FIG5, the first protruding wall 121 and the second protruding wall 122 are disposed near the middle of the elastic connector 120. That is, in this embodiment, the slot 1311 is engaged in the middle position of the elastic connector 120, which can effectively prevent the elastic connector 120 from being pulled out of the slot 1311 when absorbing large lateral vibrations and / or axial vibrations, thereby improving the stability of the connection between the elastic connector 120 and the fixed bracket 130.

[0067] In some embodiments, the locking portion 131 has a notch 1312 communicating with the locking groove 1311. The notch 1312 is used for the elastic connector 120 to engage with the locking groove 1311. The width of the notch 1312 is smaller than the diameter of the elastic connector 120. During assembly, because the width of the notch 1312 is smaller than the diameter of the elastic connector 120, the elastic deformation of the elastic connector 120 allows it to be engaged with the locking groove 1311 through the notch 1312. After engagement, the elastic connector 120 returns to its original shape, thus preventing the elastic connector 120 from disengaging from the locking groove 1311.

[0068] In some embodiments, there are multiple connecting posts 111, which are spaced apart on the housing 110. The distribution of the connecting posts 111 is mainly determined according to the specific structure of the housing 110. For example, in the structure shown in Figure 1, there are four connecting posts 111 (the other two are not shown in the figure due to the viewing angle), and these four connecting posts 111 are respectively located at the four corners of the front, back, left, and right sides of the housing 110.

[0069] The number of elastic connectors 120 is the same as the number of connecting posts 111. As shown in Figure 1, there are four elastic connectors 120.

[0070] The number of the locking parts 131 is multiple, and the number is the same as the number of the connecting posts 111; the multiple locking parts 131 are spaced apart on the fixed bracket 130. For example, as shown in Figure 4, in the structure, there are four locking parts 131, and these four connecting posts 111 are respectively provided on the fixed bracket 130, and their positions match those of the connecting posts 111 on the housing 110.

[0071] The connecting post 111, the elastic connector 120, and the locking part 131 are fitted together one by one. That is, each connecting post 111 is tightly fitted with the connecting hole 129 of its corresponding elastic connector 120, and the elastic connector 120 is inserted into the slot 1311 of the locking part 131 that matches the position of the connecting post 111, thereby realizing the connection between the housing 110 and the fixed bracket 130 and absorbing the vibration of the housing 110.

[0072] As can be seen from Figures 1 and 2, the positions of the connecting posts 111 differ in height, and consequently, the positions of the mounting parts 131 also differ in height. This is mainly due to the external shape of the housing 110. The external shape of the housing 110 primarily depends on the cavity structure of the projection device used to house the speaker module. Therefore, Figures 1 and 2 are merely examples provided in this application; the appearance of the housing 110, the location and number of the connecting posts 111, the appearance of the fixing bracket 130, and the location and number of the mounting parts 131 are determined according to actual conditions.

[0073] In one embodiment, the elastic connector 120 further has a second axial end face 127, which is disposed opposite to the first axial end face 123 in the axial direction. The second axial end face 127 is the side of the elastic connector 120 facing away from the housing 110, and a second transverse bone 128 is disposed thereon. The second transverse bone 128 is disposed on the second axial end face 127 and extends radially along the elastic connector 120. The second transverse bone 128 is used to increase the vibration absorption capacity in the axial direction.

[0074] In some embodiments, the connecting post 111 has a threaded section; the speaker module further includes a threaded fastener that helically engages with the threaded section. In some cases, to improve connection stability, in embodiments, the connecting post 111 is secured with the threaded fastener, which can further prevent the connecting post 111 from being pulled out of the connecting hole 129. This structure is used when the speaker module is suspended; it can be used when the speaker module is mounted upright, or it can be omitted when the tightening force of the elastic connector 120 on the connecting post 111 is increased.

[0075] In one embodiment, the threaded fastener abuts against the side of the resilient connector 120 opposite to the housing 110. This prevents the connecting post 111 from being pulled out of the connecting hole 129; furthermore, when the threaded fastener abuts against the other side of the resilient connector 120, it can absorb axial vibrations by causing axial deformation of the resilient connector 120. In some embodiments, the threaded fastener abuts against a second transverse bone on a second axial end face.

[0076] In some embodiments, the threaded section of the connecting post 111 can be an external thread that extends out of the connecting hole 129 to the side of the elastic connector 120 facing away from the housing 110, and then engages with it by a nut. The nut abuts against the second axial end face 127 to prevent the connecting post 111 from being pulled out of the through hole.

[0077] In some other embodiments, the connecting post 111 has an internally threaded hole that extends inward from the end of the connecting post 111 away from the housing 110 to lock an externally threaded component (such as a stud or screw) in place. The externally threaded component abuts against the second axial end face 127 to prevent the nut from pulling the connecting post 111 out of the through hole.

[0078] This application also proposes a projection device, including a housing and a speaker module. The speaker module is disposed inside the housing. This speaker module employs some or all of the technical solutions described in the foregoing embodiments, thus the projection device possesses some or all of the technical advantages of the foregoing embodiments, reducing the jitter of the internal optical engine, avoiding image jitter, and improving display quality.

[0079] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A speaker module, comprising: Sound generation module; A housing, wherein the sound-generating module is disposed within the housing; The housing is provided with connecting posts; An elastic connector, the elastic connector having an axial direction; the elastic connector having a connecting hole extending along the axial direction; a connecting post tightly fitting into the connecting hole, and a housing abutting against a first axial end face of the elastic connector; the outer peripheral wall of the connecting post having a first protruding wall and a second protruding wall spaced apart along the axial direction; and A fixed bracket is provided with a locking part, and the locking part is provided with a locking groove. The locking groove is engaged between the first protruding wall and the second protruding wall and is in close contact with the outer peripheral wall; and the locking part abuts against the first protruding wall and the second protruding wall on opposite sides respectively.

2. The speaker module as claimed in claim 1, wherein a vertical rib is protruding from the wall of the connecting hole; the connecting post is in close contact with the vertical rib.

3. The speaker module as described in claim 2, wherein, The vertical ribs are multiple, and the multiple vertical ribs are arranged at circumferential intervals along the elastic connector.

4. The speaker module as described in claim 2 or 3, wherein, The cross-sectional shape of the vertical bone is semi-circular, circular, triangular, or quadrilateral.

5. The speaker module as described in claim 1, wherein, A first transverse bone is protruding on the first axial end face, extending radially along the elastic connector; The shell is in close contact with the first transverse bone.

6. The speaker module as described in claim 5, wherein, The first transverse bone has multiple first transverse bones, which are spaced apart circumferentially along the elastic connector.

7. The speaker module as described in claim 5 or 6, wherein, The cross-sectional shape of the first transverse bone is semi-circular, circular, triangular, or quadrilateral.

8. The speaker module as claimed in claim 1, wherein, The elastic connector also has at least one third protruding wall, which is disposed on the outer peripheral wall and spaced apart from the first protruding wall and the second protruding wall along the axial direction.

9. The speaker module as described in claim 1 or 8, wherein, The first protruding wall and the second protruding wall are disposed near the middle of the elastic connector.

10. The speaker module as claimed in claim 1, wherein, The locking part has a notch communicating with the slot, and the notch is used for the elastic connector to be locked into the slot; the width of the notch is smaller than the diameter of the elastic connector.

11. The speaker module as claimed in claim 1, wherein, The number of connecting posts is multiple, and the multiple connecting posts are spaced apart on the housing; the number of elastic connectors is the same as the number of connecting posts; The number of the locking parts is multiple, and the number is the same as the number of the connecting posts; the multiple locking parts are spaced apart on the fixed bracket; The connecting column, the elastic connector, and the locking part are fitted together one by one.

12. The speaker module as claimed in claim 1, wherein, The elastic connector also has a second axial end face, which is disposed opposite to the first axial end face in the axial direction. The elastic connector also has a second transverse bone, which is disposed on the second axial end face and extends radially along the elastic connector.

13. The speaker module as claimed in claim 1, wherein, The connecting post has a threaded section; the speaker module also includes a threaded fastener, which is helically engaged with the threaded section.

14. The speaker module as claimed in claim 13, wherein, The threaded fastener abuts against the side of the elastic connector opposite to the housing.

15. A projection device, comprising: shell; and The speaker module as described in any one of claims 1 to 14, wherein the speaker module is disposed within the outer part.

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