Projection device

Abstract

The utility model discloses projection equipment, and belongs to the technical field of projection. The projection equipment comprises a projector body, a rotating assembly, a connecting assembly and a main support. Due to the fact that the rotating assembly can abut against one damping ring, or the rotating assembly abuts against the two damping rings, when the rotating assembly abuts against the damping rings of different numbers, friction resistance during rotation is different, and resistance generated when the rotating assembly abuts against one damping ring is smaller than resistance generated when the rotating assembly abuts against the two damping rings. Therefore, different rotating assemblies can be replaced according to actual requirements to meet different rotating damping requirements. Besides, due to the fact that the connecting assembly is detachably connected with the rotating assemblies and the connecting assembly is detachably connected with the main support, the connection between the connecting assembly and the rotating assemblies and the connection between the connecting assembly and the main support can be removed, and therefore different rotating assemblies can be replaced to abut against the damping rings of different numbers. Therefore, different rotating damping feelings are achieved.

Description

Technical Field

[0001] This application relates to the field of projection technology, and particularly to a projection device. Background Art

[0002] With the continuous progress and development of technology, projection devices are increasingly widely used in daily life. A projection device can convert an image or video signal into light and project it onto an electronic display device on a screen or a flat surface after magnification.

[0003] Generally, a projection device includes a bottom bracket and a projector body. The projector body is rotatably connected to the bottom bracket, and a user can adjust the angle of the projector body as needed to meet different viewing height requirements.

[0004] However, the current rotation method between the projector body and the bottom bracket is relatively single. Utility Model Content

[0005] An embodiment of this application provides a projection device, which can solve the problem that the rotation method between the projector body and the bottom bracket in the prior art is relatively single. The technical solution is as follows:

[0006] On the one hand, a projection device method is provided, including:

[0007] A projector body, a rotating component, a connecting component, and a main bracket;

[0008] The side of the projector body has a protruding part, and at least two damping rings sleeved on the protruding part. The at least two damping rings are arranged in sequence along the axial direction of the protruding part, and the inner diameters of the regions surrounded by the damping rings are different from each other;

[0009] The rotating component is detachably sleeved on the protruding part and is rotatably connected to the protruding part. The rotating component abuts against at least one of the damping rings;

[0010] The connecting component is detachably connected to the rotating component, and the connecting component is connected to the main bracket.

[0011] Optionally, for each of the damping rings sleeved on the protruding part, the inner diameter of the region surrounded by the damping ring gradually increases in the direction towards the projector body.

[0012] Optionally, the protruding part includes: a protruding part body, and a first annular protrusion and a second annular protrusion connected to the side surface of the protruding part body. The first annular protrusion is closer to the projector body than the second annular protrusion, and in the radial direction of the protruding part, the first annular protrusion protrudes from the second annular protrusion;

[0013] The at least two damping rings include: a first damping ring and a second damping ring, the first damping ring is sleeved on the first annular protrusion, and the second damping ring is sleeved on the second annular protrusion.

[0014] Optionally, the rotating assembly includes: a rotating member body and a limit baffle;

[0015] The rotating member body is sleeved on the protruding portion, and the first annular protrusion and the second annular protrusion are both located in the area surrounded by the rotating member body;

[0016] The limit baffle is sleeved on the protruding portion body, and the limit baffle is located on a side of the second annular protrusion away from the first annular protrusion;

[0017] Wherein, the inner wall of the rotating member body abuts against the first damping ring, or the inner wall of the rotating member body abuts against the first damping ring and the second damping ring respectively.

[0018] Optionally, in the case where the inner wall of the rotating member body abuts against the first damping ring and the second damping ring respectively, the rotating assembly further comprises: a third annular protrusion fixed on the inner wall of the rotating member body;

[0019] The inner wall of the rotating member body abuts against the first damping ring, and the side of the third annular protrusion facing away from the rotating member body abuts against the second damping ring.

[0020] Optionally, the limiting baffle has a through groove; the protrusion further comprises: a first limiting protrusion connected to the end of the protrusion body away from the second annular protrusion, and the first limiting protrusion matches the through groove;

[0021] Wherein, after the rotating assembly is sleeved on the protruding portion, the first limiting protrusion is located on a side of the limiting baffle away from the second annular protrusion.

[0022] Optionally, the connecting assembly has a second limiting protrusion matching the through groove;

[0023] Wherein, after the connecting assembly is connected to the rotating assembly, at least a portion of the second limiting protrusion is located in the through groove.

[0024] Optionally, the outer side surface of the first annular protrusion has a first annular groove, and a portion of the first damping ring is fixed in the first annular groove;

[0025] The outer side surface of the second annular protrusion has a second annular groove, and a portion of the second damping ring is fixed in the second annular groove.

[0026] Optionally, the connection component has a first connection hole, the rotating component has a second connection hole, and the first connection hole communicates with the second connection hole;

[0027] The projection device further includes: a first screw for connecting the first connection hole and the second connection hole.

[0028] Optionally, the connection component has a third connection hole, the main bracket has a fourth connection hole, and the third connection hole communicates with the fourth connection hole;

[0029] The projection device further includes: a second screw for connecting the third connection hole and the fourth connection hole.

[0030] The beneficial effects brought by the technical solution provided by the embodiments of the present application at least include:

[0031] Since the rotating component can abut against one damping ring, or the rotating component abuts against both damping rings, and when the rotating component abuts against different numbers of damping rings, the frictional resistance during rotation is different, and the resistance when abutting against one damping ring is less than the resistance when abutting against two damping rings, different rotating components can be replaced according to actual needs to achieve different rotational damping requirements. In addition, since the connection component is detachably connected to the rotating component, and the connection component is detachably connected to the main bracket, the connection between the connection component and the rotating component, and the connection between the connection component and the main bracket can be removed respectively, so that different rotating components can be replaced to abut against different numbers of damping rings to achieve different rotational damping sensations. After different rotating components are rotatably connected to the protruding part on the projector body, the damping sensation when the projector body rotates relative to the main bracket can be different, and thus the rotation modes of the projector body can be enriched. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 is a schematic structural diagram of a projection device provided by an embodiment of the present application;

[0034] Figure 2 is Figure 1 an exploded view of the projection device shown;

[0035] Figure 3 is a sectional view of a projector body provided by an embodiment of the present application;

[0036] Figure 4 It is a partial exploded view of a projector body provided by an embodiment of the present application;

[0037] Figure 5 It is a schematic structural diagram of a rotating component provided by an embodiment of the present application;

[0038] Figure 6 It is a sectional view of another projector body provided by an embodiment of the present application;

[0039] Figure 7 It is a sectional view of yet another projector body provided by an embodiment of the present application;

[0040] Figure 8 It is a schematic structural diagram of another rotating component provided by an embodiment of the present application;

[0041] Figure 9 It is a combined schematic diagram of a rotating component and a connecting component provided by an embodiment of the present application;

[0042] Figure 10 It is a combined schematic diagram of another rotating component and a connecting component provided by an embodiment of the present application;

[0043] Figure 11 It is a schematic structural diagram of a connecting component provided by an embodiment of the present application;

[0044] Figure 12 It is a partial exploded view of another projector body provided by an embodiment of the present application;

[0045] Figure 13 It is a schematic structural diagram of a main bracket provided by an embodiment of the present application. Detailed implementation manners

[0046] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0047] Please refer to Figure 1 and Figure 2 Figure 1 which is a schematic structural diagram of a projection device provided by an embodiment of the present application, Figure 2 is Figure 1 the exploded view of the projection device shown. The projection device 000 may include: a projector body 100, a rotating component 200, a connecting component 300, and a main bracket 400.

[0048] To more clearly see the structure of the projector body 100 in the projection device 000, please refer to Figure 3 Figure 3 ​​It is a sectional view of a projector body provided by an embodiment of the present application. The side of the projector body 100 in the projection device 000 has a protruding portion 101 and at least two damping rings 102 sleeved on the protruding portion 101. Among them, the at least two damping rings 102 are arranged in sequence along the axial direction of the protruding portion 101, and the inner diameters of the regions surrounded by the respective damping rings 102 are different. By way of example, the number of damping rings 102 in the projector body 100 is two, and the two damping rings 102 are arranged in sequence along the axial direction of the protruding portion 101.

[0049] Here, the damping ring 102 can be an annular structure made of silicone material. Since the silicone material has good friction, it can provide a stable damping effect.

[0050] The rotating assembly 200 in the projection device 000 is detachably sleeved on the protruding portion 101 and is rotatably connected to the protruding portion 101. Among them, the rotating assembly 200 in the projection device 000 abuts against at least one damping ring 102. That is to say, the rotating assembly 200 in the projection device 000 can abut against one damping ring 102, or the rotating assembly 200 in the projection device 000 can abut against both damping rings 102.

[0051] The connection assembly 300 in the projection device 000 is detachably connected to the rotating assembly 200, and the connection assembly 300 is connected to the main bracket 400. Here, since the rotating assembly 200 is rotatably connected to the protruding portion 101 on the projector body 100, and the connection assembly 300 is respectively connected to the rotating assembly 200 and the main bracket 400, the projector body 100 can be rotated relative to the bracket 400.

[0052] In the embodiment of the present application, the rotating assembly 200 can abut against one damping ring 102, or the rotating assembly 200 abuts against both damping rings 102. Since the frictional resistance during rotation is different when the rotating assembly 200 abuts against different numbers of damping rings 102, and the resistance when abutting against one damping ring 102 is less than the resistance when abutting against two damping rings 102, different rotating assemblies 200 can be replaced according to actual needs to achieve different rotational damping requirements. In addition, since the connection assembly 300 is detachably connected to the rotating assembly 200, and the connection assembly 300 is detachably connected to the main bracket 400, by respectively removing the connection between the connection assembly 300 and the rotating assembly 200, and the connection between the connection assembly 300 and the main bracket 400, different rotating assemblies 200 can be replaced to abut against different numbers of damping rings 102 to achieve different rotational damping sensations. After different rotating assemblies 200 are rotatably connected to the protruding portion 101 on the projector body 100, the damping sensation when the projector body 100 rotates relative to the main bracket 400 can be different, and thus the rotation modes of the projector body 100 can be enriched.

[0053] In summary, the present application provides a projection device, including: a projector body, a rotating component, a connecting component, and a main bracket. Since the rotating component can abut against a damping ring, or the rotating component can abut against both of the two damping rings, and when the rotating component abuts against different numbers of damping rings, the frictional resistance during rotation is different, and the resistance when abutting against one damping ring is less than the resistance when abutting against two damping rings, different rotating components can be replaced according to actual needs to achieve different rotational damping requirements. In addition, since the connecting component is detachably connected to the rotating component, and the connecting component is detachably connected to the main bracket, the connection between the connecting component and the rotating component, and the connection between the connecting component and the main bracket can be removed respectively, so that different rotating components can be replaced to abut against different numbers of damping rings to achieve different rotational damping sensations. After different rotating components are rotatably connected to the protruding part on the projector body, the damping sensation when the projector body rotates relative to the main bracket can be different, thereby enriching the rotation modes of the projector body.

[0054] In the embodiment of the present application, as Figure 3 shown, for each damping ring 102 sleeved on the protruding part 101 in the projector body 100, the inner diameter of the area surrounded by the damping ring 102 gradually increases in the direction towards the projector body 100. That is, for two adjacent damping rings 102, the inner diameter of the area surrounded by the damping ring 102 closer to the projector body 100 is greater than the inner diameter of the area surrounded by the damping ring 102 farther from the projector body 100.

[0055] In this way, it can be ensured that after different types of rotating components 200 are sleeved on the protruding part 101, they can contact different numbers of damping rings 102, so that different damping sensations can be presented between the rotating component 200 and the protruding part 101.

[0056] Exemplarily, please refer to Figure 4 , Figure 4 which is a partial exploded view of a projector body provided by an embodiment of the present application. The protruding part 101 in the projector body 100 may include: a protruding part body 1011, and a first annular protrusion 1012 and a second annular protrusion 1013 connected to the side surface of the protruding part body 1011. The first annular protrusion 1012 is closer to the projector body 100 than the second annular protrusion 1013, and in the radial direction of the protruding part 101, the first annular protrusion 1012 protrudes from the second annular protrusion 1013.

[0057] At least two damping rings 102 in the projector body 100 include: a first damping ring 1021 and a second damping ring 1022, and the first damping ring 1021 is sleeved on the first annular protrusion 1012, and the second damping ring 1022 is sleeved on the second annular protrusion 1013.

[0058] In this case, since the first annular protrusion 1012 is closer to the projector body 100 than the second annular protrusion 1013, and the first annular protrusion 1012 protrudes from the second annular protrusion 1013. Therefore, the inner diameter of the area surrounded by the first damping ring 1021 sleeved on the first annular protrusion 101 is larger than the inner diameter of the area surrounded by the second damping ring 1022 sleeved on the second annular protrusion 1013.

[0059] Here, the rotating component 200 sleeved on the protrusion 101 can be in contact only with the first damping ring 1021, or the rotating component 200 sleeved on the protrusion 101 can be in contact with both the first damping ring 1021 and the second damping ring 1022. In this way, it can be ensured that different damping sensations are presented when these two types of rotating components 200 rotate relative to the protrusion 101.

[0060] In the embodiment of the present application, please refer to Figure 5 , Figure 5 is a schematic structural diagram of a rotating component provided by an embodiment of the present application. The rotating component 200 in the projection device 000 may include: a rotating member body 201 and a limiting baffle 202.

[0061] The rotating member body 201 in the rotating component 200 is sleeved on the protrusion 101. Among them, both the first annular protrusion 1012 and the second annular protrusion 1013 in the protrusion 101 are located within the area surrounded by the rotating member body 201.

[0062] The limiting baffle 202 in the rotating component 200 is sleeved on the protrusion body 1011, and the limiting baffle 202 is located on the side of the second annular protrusion 1013 away from the first annular protrusion 1012.

[0063] In a possible implementation manner, as Figure 6 shown, Figure 6 is a cross-sectional view of another projector body provided by an embodiment of the present application. The inner wall of the rotating member body 201 in the rotating component 200 abuts against the first damping ring 1021. That is to say, the inner wall of the rotating member body 201 in this type of rotating component 200 abuts only against the first damping ring 1021 and does not abut against the second damping ring 1022. In this way, it can be ensured that the damping sensation of this type of rotating component 200 is relatively small during the process of rotating relative to the protrusion 101.

[0064] In another possible implementation, as Figure 7 shown, Figure 7 FIG. Figure 7 is a sectional view of another projector body provided by an embodiment of the present application. The inner walls of the rotating body 201 in the rotating assembly 200 are respectively in contact with the first damping ring 1021 and the second damping ring 1022. That is, the inner walls of the rotating body 201 in this type of rotating assembly 200 are in contact with both the first damping ring 1021 and the second damping ring 1022. In this way, it can be ensured that the damping feeling is relatively large during the rotation of this type of rotating assembly 200 relative to the protruding portion 101.

[0065] Exemplarily, please refer to Figure 5 and Figure 7 . When the inner walls of the rotating body 201 in the rotating assembly 200 are respectively in contact with the first damping ring 1021 and the second damping ring 1022, the rotating assembly 200 may further include: a third annular protrusion 203 fixed on the inner wall of the rotating body 201.

[0066] Wherein, the inner wall of the rotating body 201 in the rotating assembly 200 is in contact with the first damping ring 1021, and the side of the third annular protrusion 203 facing away from the rotating body 201 is in contact with the second damping ring 1022.

[0067] In this way, by the inner wall of the rotating body 201 being in contact with the first damping ring 1021 and the third annular protrusion 203 being in contact with the second damping ring 1022, the damping feeling during the rotation of the rotating assembly 200 relative to the protruding portion 101 can be increased.

[0068] It should be noted that whether the inner wall of the rotating body 201 in the rotating assembly 200 is in contact with the first damping ring 1021 or the inner walls of the rotating body 201 in the rotating assembly 200 are respectively in contact with the first damping ring 1021 and the second damping ring 1022, different rotational damping requirements can be achieved by replacing different rotating assemblies 200.

[0069] In the embodiment of the present application, please refer to Figure 7 and Figure 8 . Figure 8 FIG. Figure 8 is a schematic structural diagram of another rotating assembly provided by an embodiment of the present application. Regardless of which type of rotating assembly 200 it is, the limiting baffle 202 in the rotating assembly 200 may have a through groove M. The protruding portion 101 in the projector body 100 may further include: a first limiting protrusion 1014 connected to the end of the protruding portion body 1011 facing away from the second annular protrusion 1013, and the first limiting protrusion 1014 is matched with the through groove M.

[0070] Among them, after the rotating component 200 in the projection device 000 is sleeved on the protruding portion 101, the first limiting protrusion 1014 is located on the side of the limiting baffle 202 away from the second annular protrusion 1013.

[0071] Exemplarily, after the rotating component 200 in the projection device 000 is sleeved on the protruding portion 101, when the rotating component 200 rotates relative to the protruding portion 101, the first limiting protrusion 1014 is clamped with the side of the limiting baffle 202 away from the second annular protrusion 1013, so that the rotating component 200 is connected to the projector body 100.

[0072] Exemplarily, please refer to Figure 9 、 Figure 10 and Figure 11 , Figure 9 which is a combined schematic diagram of a rotating component and a connecting component provided by an embodiment of the present application, Figure 10 which is another combined schematic diagram of a rotating component and a connecting component provided by an embodiment of the present application, Figure 11 which is a schematic structural diagram of a connecting component provided by an embodiment of the present application. The connecting component 300 in the projection device 000 has a second limiting protrusion 301 that matches the through groove M.

[0073] Among them, after the connecting component 300 in the projection device 000 is connected to the rotating component 200, at least a part of the second limiting protrusion 301 is located in the through groove M.

[0074] Exemplarily, after the connecting component 300 in the projection device 000 is connected to the rotating component 200, the second limiting protrusion 301 is entirely located in the through groove M.

[0075] In this way, during the rotation of the projector body 100, the first limiting protrusion 1014 will not slide out of the through groove M, thereby playing a limiting role and preventing the rotating component 200 from rotating excessively.

[0076] In the embodiment of the present application, please refer to Figure 12 , Figure 12 which is another partial exploded view of the projector body provided by an embodiment of the present application. The outer side of the first annular protrusion 1012 in the protruding portion 101 has a first annular card slot U1, and a part of the first damping ring 1021 among at least two damping rings 102 is fixed in the first annular card slot U1.

[0077] The outer side of the second annular protrusion 1013 in the protruding portion 101 has a second annular card slot U2, and a part of the second damping ring 1022 among at least two damping rings 102 is fixed in the second annular card slot U2.

[0078] In this case, by fixing parts of the first damping ring 1021 and the second damping ring 1022 in the corresponding annular card slots, the stability of the connection between the damping ring 102 and the protrusion 101 can be improved, the shaking during rotation can be reduced, and the effective fixation of the damping ring 102 can be achieved.

[0079] Exemplarily, as Figure 8 and Figure 11 shown, the connection component 300 in the projection device 000 has a first connection hole 302, the rotation component 200 in the projection device 000 has a second connection hole 204, and the first connection hole 302 communicates with the second connection hole 204.

[0080] The projection device 000 may further include: a first screw (not shown) for connecting the first connection hole 302 and the second connection hole 204.

[0081] In this way, by connecting the first connection hole 302 and the second connection hole 204 with the first screw, not only can the stability between the connection component 300 and the rotation component 200 be improved, the shaking during rotation be reduced, but also it is convenient for disassembly.

[0082] In the embodiments of the present application, please refer to Figure 11 and Figure 13 , Figure 13 which is a schematic diagram of a main bracket structure provided by the embodiments of the present application. The connection component 300 in the projection device 000 has a third connection hole 303, the main bracket 400 in the projection device 000 has a fourth connection hole 401, and the third connection hole 303 communicates with the fourth connection hole 401.

[0083] The projection device 000 may further include: a second screw (not shown) for connecting the third connection hole 303 and the fourth connection hole 401.

[0084] In this way, by connecting the third connection hole 303 and the fourth connection hole 401 with the second screw, not only can the stability between the connection component 300 and the main bracket 400 be improved, the shaking during rotation be reduced, but also it is convenient for disassembly.

[0085] It should be noted that, in order to ensure the stability of the connection between the projector body 100 and the main bracket 400, the two opposite sides of the projector body 100 may respectively have a protrusion 101. In this way, two rotation components 200 can be respectively sleeved on these two protrusions 101, and two connection components 300 can be respectively used to assemble these two rotation components 200 on the main bracket 400. Thus, the two opposite sides of the projector body 100 can be respectively connected to the main bracket 400 through two rotation components 200 and two connection components 300, enabling the projector body 100 to rotate stably relative to the main bracket 400.

[0086] In summary, the present application proposes a projection device, including: a projector body, a rotating assembly, a connecting assembly, and a main bracket. Since the rotating assembly can be in contact with a damping ring, or the rotating assembly is in contact with both damping rings, and when the rotating assembly is in contact with different numbers of damping rings, the frictional resistance during rotation is different, and the resistance when in contact with one damping ring is less than the resistance when in contact with two damping rings. Therefore, different rotating assemblies can be replaced according to actual needs to achieve different rotational damping requirements. In addition, since the connecting assembly is detachably connected to the rotating assembly and the connecting assembly is detachably connected to the main bracket, the connection between the connecting assembly and the rotating assembly and the connection between the connecting assembly and the main bracket can be respectively removed, so that different rotating assemblies can be replaced to be in contact with different numbers of damping rings to achieve different rotational damping sensations. After different rotating assemblies are rotatably connected to the protruding parts on the projector body, the damping sensation when the projector body rotates relative to the main bracket can be different, and thus the rotation modes of the projector body can be enriched.

[0087] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise clearly defined.

[0088] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A projection device, characterized in that: include: A projector body (100), a rotating assembly (200), a connecting assembly (300) and a main bracket (400); The side surface of the projector body (100) is provided with a protruding portion (101), and at least two damping rings (102) sleeved on the protruding portion (101), the at least two damping rings (102) being arranged in sequence along the axial direction of the protruding portion (101), and the inner diameters of the areas surrounded by the damping rings (102) are different; The rotating assembly (200) is detachably sleeved on the protruding portion (101) and is rotationally connected to the protruding portion (101), and the rotating assembly (200) is in contact with at least one of the damping rings (102); The connecting assembly (300) is detachably connected to the rotating assembly (200), and the connecting assembly (300) is connected to the main bracket (400).

2. The projection device according to claim 1, characterized in that: For each of the damping rings (102) sleeved on the protruding portion (101), the inner diameter of the area surrounded by the damping ring (102) gradually increases in a direction toward the projector body (100).

3. The projection device according to claim 1, characterized in that: The protrusion (101) comprises: a protrusion body (1011), and a first annular protrusion (1012) and a second annular protrusion (1013) connected on a side surface of the protrusion body (1011), wherein the first annular protrusion (1012) is closer to the projector body (100) than the second annular protrusion (1013), and in a radial direction of the protrusion (101), the first annular protrusion (1012) protrudes beyond the second annular protrusion (1013); The at least two damping rings (102) include: a first damping ring (1021) and a second damping ring (1022); the first damping ring (1021) is sleeved on the first annular protrusion (1012); and the second damping ring (1022) is sleeved on the second annular protrusion (1013).

4. The projection device according to claim 3, characterized in that: The rotating assembly (200) comprises: a rotating member body (201) and a limit baffle (202); The rotating member body (201) is sleeved on the protruding portion (101), and the first annular protrusion (1012) and the second annular protrusion (1013) are both located within the area surrounded by the rotating member body (201); The limiting baffle (202) is sleeved on the protruding portion body (1011), and the limiting baffle (202) is located on a side of the second annular protrusion (1013) that is away from the first annular protrusion (1012); The inner wall of the rotating member body (201) abuts against the first damping ring (1021), or the inner wall of the rotating member body (201) abuts against the first damping ring (1021) and the second damping ring (1022), respectively.

5. The projection device according to claim 4, characterized in that: When the inner wall of the rotating member body (201) is in contact with the first damping ring (1021) and the second damping ring (1022), respectively, the rotating assembly (200) further comprises: a third annular protrusion (203) fixed on the inner wall of the rotating member body (201); The inner wall of the rotating member body (201) abuts against the first damping ring (1021), and the side of the third annular protrusion (203) facing away from the rotating member body (201) abuts against the second damping ring (1022).

6. The projection device according to claim 4, characterized in that: The limiting baffle (202) has a through groove (M); the protrusion (101) further comprises: a first limiting protrusion (1014) connected to the end of the protrusion body (1011) away from the second annular protrusion (1013), the first limiting protrusion (1014) matching the through groove (M); Wherein, after the rotating assembly (200) is sleeved on the protruding portion (101), the first limiting protrusion (1014) is located on a side of the limiting baffle (202) away from the second annular protrusion (1013).

7. The projection device according to claim 6, characterized in that: The connecting assembly (300) has a second limiting protrusion (301) matching the through groove (M); Wherein, after the connecting assembly (300) is connected to the rotating assembly (200), at least a portion of the second limiting protrusion (301) is located in the through groove (M).

8. The projection device according to any one of claims 3 to 7, characterized in that: The outer side surface of the first annular protrusion (1012) has a first annular groove (U1), and a portion of the first damping ring (1021) is fixed in the first annular groove (U1); The outer side surface of the second annular protrusion (1013) has a second annular groove (U2), and a portion of the second damping ring (1022) is fixed in the second annular groove (U2).

9. The projection device according to any one of claims 1 to 7, characterized in that: The connecting assembly (300) has a first connecting hole (302), the rotating assembly (200) has a second connecting hole (204), and the first connecting hole (302) is in communication with the second connecting hole (204); The projection device (000) further comprises: a first screw for connecting the first connection hole (302) and the second connection hole (204).

10. The projection device according to any one of claims 1 to 7, characterized in that: The connecting assembly (300) has a third connecting hole (303), the main bracket (400) has a fourth connecting hole (401), and the third connecting hole (303) is in communication with the fourth connecting hole (401); The projection device (000) further comprises: a second screw for connecting the third connection hole (303) and the fourth connection hole (401).

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