Rotating mechanism and projection equipment

Abstract

The utility model discloses a rotating mechanism and a projection device, the rotating mechanism comprises a module housing, a rotating shaft, a first gear disc, a second gear disc, a driving member, a damping assembly and a first connecting member, the rotating shaft passes through a first support hole of the module housing, and the rotating shaft rotatably abuts against the first support hole; the rotating shaft is sleeved with the first gear disc and the damping assembly, the damping assembly abuts against the first gear disc, and the first connecting piece is arranged on the rotating shaft; the driving part is in transmission connection with the second gear disc, the second gear disc and the first gear disc are in transmission connection and are not coaxially arranged, the first side of the first gear disc abuts against the second inner side wall of the module shell, and the second side of the first gear disc abuts against the second gear disc in a rotating mode and is separated from the first inner side wall of the module shell. The side, away from the first gear disc, of the second gear disc abuts against the first inner side wall. According to the utility model, the problem of movement of the driving part in the axial direction can be avoided, so that the projection equipment can be kept stable all the time.

Description

Technical Field

[0001] This utility model relates to the field of projection equipment technology, and in particular to a rotating mechanism and a projection device. Background Technology

[0002] In the consumer electronics market, projectors are highly favored by consumers due to their miniaturization, portability, large screen size, and high brightness. However, as the application scenarios for projectors increase, their shortcomings in automation have gradually become apparent. In particular, because projectors are generally not placed directly opposite the screen, users often need to rotate the projector to ensure that the projection area covers the screen as much as possible.

[0003] To address this, projectors typically include a base to support them. A motor-driven mechanism connects the projector to the base for automatic rotation, eliminating the need for manual intervention. This allows the projector to automatically tilt or laterally rotate relative to the base to change its projection direction and adjust the projection area. However, due to the inherent imprecision of rotation algorithms, manual rotation of the projector is sometimes necessary for fine-tuning the projection area. When manually adjusting the projector's orientation, the gear transmission driven by manual rotation directly forces the output shaft of the motor to rotate. This often results in some lateral movement along the motor's output shaft, causing instability in the overall structure of the projection device during manual adjustments. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes a rotating mechanism and a projection device, which can avoid the problem of axial movement of the driving component and enable the projection device to remain stable at all times.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, this utility model discloses a rotating mechanism, including a module housing, a rotating shaft, a first gear disk, a second gear disk, a driving component, a damping assembly, and a first connecting member. The module housing forms a receiving cavity to accommodate the rotating shaft, the first gear disk, and the second gear disk. A first support hole is provided on the module housing. The rotating shaft passes through the first support hole and rotatably abuts against the wall of the first support hole. The first gear disk and the damping assembly are respectively sleeved on the rotating shaft. The damping assembly abuts against the first gear disk, causing the first gear disk to be damped and rotatably connected to the rotating shaft. The first connecting member is disposed on the rotating shaft and located outside the first support hole of the module housing. The driving component is... The first gear is mounted on the module housing and is connected to the second gear disk in a driving manner. The second gear disk is connected to the first gear disk in a driving manner but is not coaxially arranged. The first side of the first gear disk abuts against the second inner sidewall of the module housing. The second side of the first gear disk rotates against the second gear disk and is separated from the first inner sidewall of the module housing. The first side and the second side of the first gear disk are opposite sides. The side of the second gear disk away from the first gear disk abuts against the first inner sidewall. The first gear disk is clamped between the second inner sidewall and the second gear disk. The first inner sidewall and the second inner sidewall are spaced apart and opposite to each other. The first support hole is opened in the first inner sidewall or the second inner sidewall.

[0007] Preferably, the first support hole is formed in the first inner sidewall, the damping assembly abuts against the side of the first gear disk away from the first connector, and a second support hole is formed in the second inner sidewall, the second support hole being opposite to the first support hole, wherein:

[0008] An annular boss is formed on the first side of the first gear disk, and the outer wall of the annular boss rotatably abuts against the wall of the second support hole; or, the rotating shaft rotatably abuts against the wall of the second support hole.

[0009] Preferably, the module housing includes a first housing and a second housing that are detachably connected, the first housing and the second housing being spliced ​​together to form the accommodating cavity, the first support hole being formed in the first housing, and the second support hole being formed in the second housing.

[0010] Preferably, the first side of the first gear disk abuts against the inner wall of the second housing, the second side of the first gear disk rotates against the second gear disk and is separated from the inner wall of the first housing, and the side of the second gear disk away from the first gear disk abuts against the inner wall of the first housing.

[0011] Preferably, the rotating shaft is provided with an annular baffle, the second side of the first gear disk abuts against the annular baffle, and the damping component abuts against the first side of the first gear disk.

[0012] Preferably, a first annular baffle protrudes from the side of the first gear disk near the second inner sidewall, and the first gear disk rotates against the second inner sidewall through the first annular baffle; a third annular baffle protrudes from the side of the second gear disk near the first inner sidewall, and the second gear disk rotates against the first inner sidewall through the third annular baffle.

[0013] Preferably, a second annular baffle protrudes from the side of the first gear disk near the first inner sidewall, and the first gear disk abuts against the second gear disk through the second annular baffle.

[0014] Preferably, the rotating mechanism further includes a gear a, which is coaxially connected to the second gear disk and rotates synchronously, and the gear a meshes with the first gear disk.

[0015] Preferably, the rotating mechanism further includes a support shaft, the second gear disk is sleeved on the support shaft, and the two ends of the support shaft are respectively engaged in the fixing holes formed on the second inner sidewall and the first inner sidewall.

[0016] Secondly, this utility model discloses a projection device, including a projection host, a base and the rotating mechanism described in the first aspect, wherein the base is fixedly connected to the first connecting member and the module housing is fixedly connected to the projection host.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: In the rotating mechanism and projection device disclosed in this utility model, the first gear disk and the second gear disk abut against the opposing first and second inner sidewalls of the module housing in the axial direction of the rotating shaft, which can prevent the rotating shaft from moving axially, thereby avoiding the problem of axial movement of the driving component and ensuring that the projection device can always remain stable. In addition, this solution can use the second gear disk to support the first gear disk in the circumferential direction, eliminating the need for additional support components, and the second gear disk rotates in the opposite direction to the first gear disk, which can reduce the friction generated between them.

[0018] In a further embodiment, this utility model also has the following beneficial effects:

[0019] (1) By opening a second support hole on the second inner sidewall and making the rotating shaft directly or indirectly rotate and abut against the hole wall of the second support hole, the weight of the projector can be transmitted to the two positions of the rotating shaft through the module housing, thereby dispersing the pressure. This can effectively prevent the rotating shaft from breaking due to excessive force at a single point, and the rotating mechanism is less prone to shaft eccentricity during transmission.

[0020] (2) By setting the first annular baffle and the third annular baffle, the friction between the first gear disk and the inner wall of the module housing during rotation can be reduced.

[0021] (3) By setting a second annular baffle, the friction between the first gear disk and the second gear disk can be reduced, and the rotational interference can be reduced, but at the same time, the axial relationship is still maintained to prevent mutual movement.

[0022] (4) A right-angle support structure can be formed between the second gear disk and gear a, which supports the first gear disk in the radial and axial directions, providing better stability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the rotating mechanism of a preferred embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Another structural schematic diagram of the rotating mechanism;

[0025] Figure 3 yes Figure 1 Cross-sectional schematic diagram of the rotating mechanism;

[0026] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0027] Figure 5 yes Figure 1 A side view of the cross-section of the rotating mechanism;

[0028] Figure 6 yes Figure 1 Exploded view of the rotating mechanism;

[0029] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0030] Figure 8 yes Figure 1 Another perspective of the exploded structure of the rotating mechanism;

[0031] Figure 9 yes Figure 8 Enlarged view of point C in the middle;

[0032] Figure 10 yes Figure 1 Exploded view of the rotating mechanism;

[0033] Figure 11 yes Figure 10 Enlarged view of point D in the middle;

[0034] Figure 12 yes Figure 1 An exploded view of the rotating mechanism from another perspective;

[0035] Figure 13 yes Figure 10 Enlarged diagram of point E in the middle.

[0036] Explanation of icon numbers:

[0037] 10. Module housing; 11. First housing; 111. First support hole; 112. First inner sidewall; 12. Second housing; 121. Second support hole; 122. Second inner sidewall; 13. Ear plate; 14. Fixing hole;

[0038] 20. Rotating shaft; 21. First position; 22. Second position; 23. Annular baffle; 24. Limiting step; 25. First tangential plane; 26. Second tangential plane;

[0039] 30. First gear disc; 31. Annular boss; 311. Receiving groove; 32. Gear through hole; 33. First annular retaining rib; 34. Second annular retaining rib;

[0040] 40. Driving components;

[0041] 50. Second gear disc; 51. Third annular retaining rib;

[0042] 60. Damping assembly; 61. Elastic element; 62. First washer; 63. Second washer;

[0043] 70. First connecting component;

[0044] 81. First fastener; 82. Second fastener;

[0045] 91. Gear a; 92. Support shaft. Detailed Implementation

[0046] The embodiments of this utility model are described in detail below. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of this utility model.

[0047] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be used for both fixing and circuit / signal connectivity.

[0048] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] like Figure 1 and Figure 2 As shown, a preferred embodiment of this utility model discloses a projection device and its rotating mechanism. The projection device includes a projection host, a base, and a rotating mechanism. The first connecting member 70 of the rotating mechanism is fixedly connected to the base, and the projection host is fixedly connected to the module housing 10 of the rotating mechanism. Specifically, the module housing 10 is provided with an ear plate 13, and the module housing 10 is fixedly connected to the projection host through the ear plate 13.

[0051] Combination Figures 3 to 5The rotating mechanism includes a module housing 10, a rotating shaft 20, a first gear disk 30, a driving member 40, a second gear disk 50, a damping assembly 60, and a first connecting member 70. A receiving cavity is formed in the module housing 10 to accommodate the rotating shaft 20, the first gear disk 30, and the second gear disk 50. A first support hole 111 is provided on the module housing 10. The rotating shaft 20 passes through the first support hole 111 and rotatably abuts against the wall of the first support hole 111. The first gear disk 30 and the damping assembly 60 are respectively sleeved on the rotating shaft 20. The damping assembly 60 abuts against the side of the first gear disk 30 away from the first connecting member 70, so that the first gear disk 30 and the rotating shaft 20 are damped and rotatably connected. The first connecting member 70 is provided on the rotating shaft 20 and located outside the first support hole 111 of the module housing 10. The driving member 40 is provided on the module housing 10. The first gear disk 30 is connected to the second gear disk 50 in a transmission manner. The second gear disk 50 is connected to the first gear disk 30 in a transmission manner and is not coaxially arranged, but their axes are parallel to each other. The first side of the first gear disk 30 abuts against the second inner wall 122 of the module housing 10. The second side of the first gear disk 30 rotates against the second gear disk 50 and is separated from the first inner wall 112 of the module housing 10. The first side and the second side of the first gear disk 30 are opposite sides. The side of the second gear disk 50 away from the first gear disk 30 abuts against the first inner wall 112. The first gear disk 30 is clamped between the second inner wall 122 and the second gear disk 50. The axes of the first gear disk 30 and the second gear disk 51 are parallel to each other. The first inner wall 112 and the second inner wall 122 are spaced apart and opposite to each other. The first support hole 111 is opened in the first inner wall 112.

[0052] With the above structural arrangement, the first gear disk 30 and the second gear disk 50 abut against the second inner sidewall 122 and the first inner sidewall 112 of the module housing 10 in the axial direction of the rotating shaft 30. On the one hand, it can prevent the rotating shaft 20 from moving in the axial direction. On the other hand, the second gear disk 50 can support the first gear disk 30 in the circumferential direction without the need for additional support members. Moreover, the second gear disk 50 and the first gear disk 30 rotate in opposite directions, that is, one rotates counterclockwise and the other rotates clockwise, which can reduce the friction generated between the two.

[0053] It should be noted that the first support hole 111 may also be formed on the second inner sidewall 122. In some embodiments, the damping component 60 may also be located on the side of the first gear disk 30 near the first connector 70. In this case, the first gear disk 30 can be axially sleeved on the rotating shaft 20, and then the damping component 60 can be sleeved on the rotating shaft 20 in the same direction to press the first gear disk 30 to the rotating shaft 20. An annular boss 31 is formed on the side of the first gear disk 30 near the damping component 60. The annular boss 31 surrounds and forms a receiving groove 311. The damping component 60 is completely received in the receiving groove 311. The first gear disk 30 abuts against the inner sidewall of the module housing 10 in the axial direction through the annular boss 31. The inner sidewall has a first support hole 111. Then, the rotating shaft 20 is installed into the module housing 10, and one end extends out of the first support hole 111. The first connector 70 is assembled on the end of the rotating shaft 20 that extends out of the module housing 10.

[0054] In this embodiment, a second support hole 121 is formed on the second inner sidewall 122, which is opposite to the first support hole 111. An annular boss 31 is formed on the first side of the first gear disk 30, and the outer wall of the annular boss 31 rotatably abuts against the wall of the second support hole 121. In other embodiments, a second support hole 121 is formed on the second inner sidewall 122, which is opposite to the first support hole 111, and the rotating shaft 20 rotatably abuts against the wall of the second support hole 111. By opening a second support hole 121 on the second inner sidewall 122, and allowing the rotating shaft 20 to directly or indirectly rotate and abut against the wall of the second support hole 111, the weight of the projection host can be transmitted through the module housing 10 to two positions of the rotating shaft 20 (the two positions include the first position 21 where the rotating shaft 20 abuts against the first support hole 111 and the second position 22 where the first gear disk 30 is sleeved on the rotating shaft 20; in some other embodiments mentioned above, the second position 22 is the position where the rotating shaft 20 abuts against the second support hole 121), thus achieving pressure dispersion. This effectively prevents the rotating shaft 20 from breaking due to excessive force at a single point. Furthermore, the interval between the first position 21 and the second position 22 along the axial direction of the rotating shaft 20 makes it less likely for the rotating mechanism to become eccentric during transmission. In addition, there is no need to reserve more space on the rotating shaft 20 to support the module housing 10. That is, the module housing 10 directly abuts against the rotating shaft 20 through the first position 21 on the rotating shaft 20, and indirectly abuts against the rotating shaft 20 through the first gear disk 30 through the second position 22. Alternatively, the module housing 10 directly abuts against the rotating shaft 20 through the second position 22. There is no need to reserve space in the axial direction at the second position 22 to support the module housing 10. This allows the rotating shaft 20 to be shortened, which in turn helps to reduce the overall thickness of the rotating mechanism.

[0055] In this embodiment, the annular boss 31 is a continuous closed ring structure. In other embodiments, the annular boss 31 can also be a discontinuous annular structure formed by multiple discontinuous bosses arranged circumferentially.

[0056] The driving component 40 is a motor, which is fixed to the outer wall of the module housing 10, or it can be fixed to the inner wall of the module housing 10. The module housing 10 includes a detachably connected first housing 11 and a second housing 12, which are spliced ​​together to form a receiving cavity. A first support hole 111 is formed in the first housing 11, and a second support hole 121 is formed in the second housing 12. The first support hole 111 and the second support hole 121 are generally circular holes. Specifically, the first side of the first gear disk 30 abuts against the inner wall of the second housing 12, the second side of the first gear disk 30 rotates against the second gear disk 50 and is separated from the inner wall of the first housing 11, and the side of the second gear disk 50 away from the first gear disk 30 abuts against the inner wall of the first housing 11. The first gear disk 30 is clamped between the second housing 12 and the second gear disk 50.

[0057] The rotating mechanism also includes a first fastener 81. A limiting step 24 is provided on the rotating shaft 20 at the position extending from the first support hole 111. The first connecting member 70 is locked to the limiting step 24 by the first fastener 81 and spaced apart from the module housing 10. By forming a simple structure on the rotating shaft 20, the first connecting member 70 can be prevented from directly abutting against the module housing 10, eliminating the need for additional spacers or other partitioning parts between the first connecting member 70 and the module housing 10. This saves costs and improves assembly efficiency. Figures 6 to 9 The outer wall of the rotating shaft 20 is provided with a first tangent plane 25. The first connector 70 is engaged with the first tangent plane 25 in the circumferential direction to rotate synchronously with the rotating shaft 20. The first connector 70 is spaced from the module housing 10 so that the first connector 70 will not rub against the module housing 10 when rotating with the rotating shaft 20. With this structure, the base, the first connector 70 and the rotating shaft 20 always remain relatively stationary. Therefore, when the driving member 40 drives the second gear disk 50 to further drive the first gear disk 30, it is only necessary to consider the relationship between the damping torque generated by the damping component 60 on the first gear disk 30 and the driving torque generated by the second gear disk 50 on the first gear disk 30. This enables the electric drive rotation of the projector relative to the base. The torque configuration is simple and reliable, and it can avoid the rotation error of the projector relative to the base caused by the rotating shaft 20 slipping with the first connector 70 due to the rotation of the first gear disk 30 during the driving process of the driving member 40.

[0058] The rotating shaft 20 is provided with an annular baffle 23. The second side of the first gear disk 30 abuts against the annular baffle 23, and the damping assembly 60 abuts against the first side of the first gear disk 30 to press the first gear disk 30 against the annular baffle 23, so that the first gear disk 30 can be pressed more fully and stably by the damping assembly 60.

[0059] The rotating mechanism also includes a second fastener 82, and the damping assembly 60 includes an elastic element 61. The second fastener 82 and the elastic element 61 are respectively sleeved and fixed on the outer wall of the rotating shaft 20. The elastic element 61 is clamped between the first gear disk 30 and the second fastener 82. The second fastener 82 is locked on the rotating shaft 20. The second fastener 82 is, for example, a nut threaded onto the rotating shaft 20, or the second fastener 82 can also be a snap ring to snap and fix it on the rotating shaft 20. Furthermore, the damping assembly 60 also includes a first washer 62 and a second washer 63. The first washer 62 and the second washer 63 are sleeved on the outer wall of the rotating shaft 20, and the first washer 62 is clamped between the first gear disk 30 and the elastic member 61, and the second washer 63 is clamped between the second fastener 82 and the elastic member 61. The outer wall of the rotating shaft 20 is provided with a second tangent plane 26. The first washer 62 and the third washer 63 are respectively engaged with the second tangent plane 26 in the circumferential direction. For example, the center opening of the first washer 62 and the third washer 63 has a straight edge that matches the second tangent plane 26 to achieve a stable sleeve so that they can rotate synchronously with the rotating shaft 20, that is, remain stationary relative to the rotating shaft 20. This ensures that the first gear disk 30 will not drive the second fastener 82 to rotate when it rotates relative to the rotating shaft 20, thus ensuring that the damping assembly 60 can always provide a stable clamping force. The elastic element 61 located on the first washer 62 and the third washer 63 is elastic in the circumferential direction, thereby enabling the first gear disk 30 to be elastically pressed against the annular baffle 23 to generate damping. The elastic element 61 may be, for example, a cup-shaped washer or a telescopic spring. A receiving groove 311 is formed between the annular boss 31 and the rotating shaft 20. At least a portion of the damping assembly 60 is disposed within the receiving groove 311, which can shorten the axial dimension of the rotating shaft 20. In this embodiment, the elastic element 61, the first washer 62, and the third washer 63 are all disposed within the receiving groove 311, which is beneficial for compressing the length of the rotating shaft 20.

[0060] The gear hole 32 at the center of the first gear disk 30 is circular, so that the first gear disk 30 and the rotating shaft 20 can still rotate relative to each other when the first gear disk 30 is fitted onto the position corresponding to the second tangent plane 26.

[0061] Combination Figures 10 to 13A first annular baffle 33 protrudes from the side of the first gear disk 30 near the second inner sidewall 122, allowing the first gear disk 30 to rotate and abut against the second inner sidewall 122. A third annular baffle 51 protrudes from the side of the second gear disk 50 near the first inner sidewall 112, also allowing the second gear disk 50 to rotate and abut against the first inner sidewall 122. By providing the first annular baffle 33 and the third annular baffle 51, friction between the first gear disk 30 and the second gear disk 50 and the inner wall of the module housing 10 during rotation can be reduced. Furthermore, a second annular baffle 34 protrudes from the side of the first gear disk 30 near the first inner sidewall 112, allowing the first gear disk 30 to abut against the second gear disk 50. By providing the second annular baffle 34, friction between the first gear disk 30 and the second gear disk 50 can be reduced, minimizing rotational interference, while simultaneously ensuring an axial abutment relationship to prevent mutual movement.

[0062] In this embodiment, the rotating mechanism further includes gear a 91, which is coaxially connected to and rotates synchronously with the second gear disk 50. Gear a 91 and the first gear disk 30 are located on the same plane and mesh with each other. The radial dimension of gear a 91 is smaller than that of the second gear disk 50. A right-angle support structure can be formed between the second gear disk 50 and gear a 91 to support the first gear disk 30 radially and axially, providing better stability.

[0063] In this embodiment, the rotating mechanism further includes a support shaft 92, and the second gear disk 50 is sleeved on the support shaft 92. The two ends of the support shaft 92 are respectively inserted into the fixing holes 14 formed on the second inner sidewall 122 and the first inner sidewall 112.

[0064] Combination Figure 3 and Figure 4 The working principle of the projection device and its rotating mechanism according to the preferred embodiment of this utility model is explained below.

[0065] The module housing 10 is fixed to the projector host, and the first connector 70 is fixed to the support arm of the base. The first connector 70 and the rotating shaft 20 always rotate synchronously. The first gear disk 30 can rotate relative to the rotating shaft 20 under the clamping force of the damping component 60.

[0066] In electric drive mode, the drive unit 40 controls the second gear disk 50 to rotate, thereby driving the first gear disk 30 to rotate. At this time, the damping torque between the first gear disk 30 and the rotating shaft 20 is greater than the transmission torque from the second gear disk 50, meaning the first gear disk 30 will not rotate relative to the rotating shaft 20. Thus, the projector, module housing 10, and drive unit 40 are relatively stationary, while the first gear disk 30, rotating shaft 20, first connector 70, and base are relatively stationary. When the first gear disk 30 rotates relative to the module housing 10 while remaining stationary with respect to the rotating shaft 20, the projector can ultimately rotate relative to the base, completing the electric rotation.

[0067] In manual rotation mode, the user presses the projector to apply force. This force is transmitted through the projector to the module housing 10, the second gear disk 50, and finally to the first gear disk 30. The torque exerted on the first gear disk 30 is greater than the damping torque between the first gear disk 30 and the rotating shaft 20, causing the first gear disk 30 to rotate relative to the rotating shaft 20. The projector, module housing 10, drive component 40, second gear disk 50, and first gear disk 30 are relatively stationary, while the rotating shaft 20, first connector 70, and base are relatively stationary on the other side, ultimately achieving the effect of the projector rotating relative to the base.

[0068] The rotating mechanism in this embodiment can be applied not only to projection equipment, but also to lighting equipment, camera pan-tilt units, robots, and many other fields, which will not be listed here.

[0069] The background section of this utility model may include background information about the problems or circumstances surrounding the present utility model, rather than a description of prior art by others. Therefore, the content included in the background section is not an admission of prior art by the applicant.

[0070] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope defined by the appended claims.

Claims

1. A rotating mechanism, characterized by comprising: The module housing, the rotating shaft, the first gear plate, the second gear plate, the driving member, the damping assembly and the first connecting member, the module housing is formed with a containing cavity to contain the rotating shaft, the first gear plate and the second gear plate, and a first supporting hole is formed in the module housing; The rotating shaft is arranged in the first supporting hole and rotates against the hole wall of the first supporting hole, the first gear plate and the damping assembly are respectively arranged on the rotating shaft, the damping assembly abuts against the first gear plate to make the first gear plate and the rotating shaft in damping rotation connection, and the first connecting member is arranged on the rotating shaft and located outside the first supporting hole of the module housing; The driving member is arranged on the module housing and in transmission connection with the second gear plate, the second gear plate is in transmission connection with the first gear plate and is arranged non-coaxially, the first side of the first gear plate abuts against the second inner side wall of the module housing, the second side of the first gear plate rotates against the second gear plate and is spaced from the first inner side wall of the module housing, the first side and the second side of the first gear plate are opposite sides, the side of the second gear plate away from the first gear plate abuts against the first inner side wall, and the first gear plate is clamped between the second inner side wall and the second gear plate, wherein the first inner side wall and the second inner side wall are spaced apart, and the first supporting hole is formed in the first inner side wall or the second inner side wall.

2. The swivel mechanism of claim 1, wherein The first supporting hole is formed in the first inner side wall, the damping assembly abuts against the side of the first gear plate away from the first connecting member, a second supporting hole is formed in the second inner side wall, and the second supporting hole is opposite to the first supporting hole, wherein: The first side of the first gear plate is formed with an annular boss, and the outer wall of the annular boss rotates against the hole wall of the second supporting hole; or the rotating shaft rotates against the hole wall of the second supporting hole.

3. The swivel mechanism of claim 2, wherein, The module housing comprises a first housing and a second housing which are detachably connected and are spliced with each other to form the containing cavity, the first supporting hole is formed in the first housing, and the second supporting hole is formed in the second housing.

4. The swivel mechanism of claim 3, wherein, The first side of the first gear plate abuts against the inner side wall of the second housing, the second side of the first gear plate rotates against the second gear plate and is spaced from the inner side wall of the first housing, the side of the second gear plate away from the first gear plate abuts against the inner side wall of the first housing, and the first gear plate is clamped between the second housing and the second gear plate.

5. The swivel mechanism of claim 1, wherein, The rotating shaft is provided with an annular baffle, the second side of the first gear plate abuts against the annular baffle, and the damping assembly abuts against the first side of the first gear plate.

6. The swivel mechanism of claim 1, wherein, The first gear plate protrudes to form a first annular stop rib on a side close to the second inner side wall, and the first gear plate is rotationally abutted against the second inner side wall by the first annular stop rib; the second gear plate protrudes to form a third annular stop rib on a side close to the first inner side wall, and the second gear plate is rotationally abutted against the first inner side wall by the third annular stop rib.

7. The swivel mechanism of claim 1, wherein The first gear plate protrudes to form a second annular stop rib on a side close to the first inner side wall, and the first gear plate is abutted against the second gear plate by the second annular stop rib.

8. The swivel mechanism of claim 1, wherein, The rotation mechanism further comprises a gear a coaxially connected with the second gear plate and synchronously rotated, and the gear a is engaged with the first gear plate.

9. The swivel mechanism of claim 1, wherein, The rotation mechanism further comprises a support shaft, the second gear plate is sleeved on the support shaft, and both ends of the support shaft are clamped into fixing holes formed on the second inner side wall and the first inner side wall respectively.

10. A projection apparatus, characterized by, The rotation mechanism further comprises a projection host, a base and the rotation mechanism according to any one of claims 1 to 9, the base is fixedly connected with the first connecting piece, and the module shell is fixedly connected with the projection host.

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