Rotating mechanism and projection equipment

Abstract

The utility model discloses a rotating mechanism and projection equipment, the rotating mechanism comprises a module shell, a rotating shaft, a first gear disc, a driving piece, a gear set, a damping assembly and a first connecting piece, the module shell is provided with a first supporting hole and a second supporting hole which are opposite to each other, and the outer wall of the rotating shaft comprises a first position and a second position which are spaced along the axial direction; the rotating shaft rotatably abuts against the hole wall of the first supporting hole at the first position, the first gear disc is rotatably connected to the second position of the rotating shaft in a sleeving mode, an annular boss is formed on the side, close to the second supporting hole, of the first gear disc, and the outer wall of the annular boss rotatably abuts against the hole wall of the second supporting hole. The damping assembly is arranged on the outer wall of the rotating shaft in a sleeving mode and abuts against the first gear disc. The driving piece is in transmission connection with the gear set which is in transmission connection with the first gear disc. The first connecting piece is arranged on the rotating shaft and located on the outer side of the first supporting hole of the module shell. According to the utility model, the driving piece can be prevented from being damaged, and the rotating shaft is prevented from being broken.

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, potentially damaging the motor. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes a rotating mechanism and projection device, which can not only avoid damage to the driving components, but also avoid shaft breakage.

[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 driving component, a gear set, a damping component, and a first connecting component. The module housing forms a receiving cavity to accommodate the rotating shaft, the first gear disk, and the gear set. The module housing has opposing first and second support holes. The outer wall of the rotating shaft includes a first position and a second position spaced axially apart. The rotating shaft rotatably abuts against the wall of the first support hole at the first position. The first gear disk is rotatably sleeved and connected to the second position of the rotating shaft. An annular boss is formed on the side of the first gear disk near the second support hole, and the outer wall of the annular boss rotatably abuts against the wall of the second support hole. The damping component is sleeved on the outer wall of the rotating shaft and abuts against the first gear disk, so that the first gear disk and the rotating shaft are damped and rotatably connected. The driving component is disposed on the module housing and is drivingly connected to the gear set, which is drivingly connected to the first gear disk. The first connecting component is disposed on the rotating shaft and located on the module housing outside the first support hole.

[0007] Preferably, the diameter of the second support hole is larger than the diameter of the first support hole.

[0008] Preferably, a receiving groove is formed between the annular boss and the rotating shaft, and at least a portion of the damping assembly is disposed within the receiving groove.

[0009] Preferably, the rotating shaft is provided with an annular baffle, the annular baffle is located between the first gear disk and the first connecting member, and the damping component abuts against the side of the first gear disk away from the annular baffle to press the first gear disk against the annular baffle.

[0010] Preferably, the gear set includes a second gear disk, a first side of the first gear disk rotatably abuts against the second inner wall of the module housing, a second side of the first gear disk rotatably abuts against the second gear disk and is spaced apart from the first inner wall of the module housing, the first gear disk is clamped between the second inner wall and the second gear disk, and the side of the second gear disk away from the first gear disk abuts against the first inner wall of the module housing, wherein the first inner wall and the second inner wall of the module housing are spaced apart and opposite, the first support hole is opened in the first inner wall, the second support hole is opened in the second inner wall, and the first side and the second side of the first gear disk are opposite sides.

[0011] Preferably, the rotating mechanism further includes a first fastener, and a limiting step is provided at the position on the rotating shaft extending out of the first support hole. The first connecting member is locked to the limiting step by the first fastener and is spaced apart from the module housing.

[0012] Preferably, the outer wall of the rotating shaft is provided with a first cutting plane, and the first connector is engaged with the first cutting plane in the circumferential direction so as to rotate synchronously with the rotating shaft.

[0013] Preferably, the rotating mechanism further includes a second fastener, the damping component includes an elastic element, the second fastener and the elastic element are respectively sleeved and fixed to the outer wall of the rotating shaft, and the elastic element is clamped between the first gear disk and the second fastener.

[0014] Preferably, the damping assembly further includes a first washer, which is sleeved on the outer wall of the rotating shaft and clamped between the first gear disk and the elastic element. The outer wall of the rotating shaft is provided with a second tangent plane, and the first washer is engaged with the second tangent plane in the circumferential direction to rotate synchronously with the rotating shaft.

[0015] 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 first connecting member is fixedly connected to the base, and the projection host is fixedly connected to the module housing.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: The rotating mechanism and projection device disclosed in this utility model integrate the driving component and its transmission structure on the rotating mechanism, which facilitates overall assembly and disassembly and avoids damage to the driving component; moreover, the weight of the projection host is transmitted to the first and second positions of the rotating shaft through the module housing, realizing pressure distribution and effectively preventing the rotating shaft from breaking due to excessive force at a single point. In addition, in this solution, the annular boss structure extending to the side of the damping component on the first gear disk abuts against the rotating housing during rotation. On the one hand, this makes it less likely for the rotating shaft to become eccentric during transmission; on the other hand, it eliminates the need to reserve more space on the rotating shaft to support the module housing. That is, the module housing only directly abuts against the rotating shaft at the first position and indirectly abuts against the rotating shaft at the second position through the first gear disk, which allows the rotating shaft to be shortened, thereby helping to reduce the overall thickness of the rotating mechanism.

[0017] In a further embodiment, this utility model also has the following beneficial effects:

[0018] (1) A receiving groove is formed between the annular boss and the shaft, such that at least a portion of the damping assembly is disposed in the receiving groove, thereby shortening the axial dimension of the shaft.

[0019] (2) An annular baffle is provided on the rotating shaft, and the damping component abuts against the side of the first gear disk away from the annular baffle, so that the first gear disk can be pressed more fully and stably by the damping component.

[0020] (3) By making the first gear disk and the second gear disk abut against each other in the axial direction of the shaft between the two opposite inner sidewalls of the module housing, on the one hand, the shaft can be prevented from moving in the axial direction; on the other hand, the second gear disk provides axial support for the first gear disk without the need for additional support components. Furthermore, the second gear disk rotates in the opposite direction to the first gear disk, which can reduce the friction between the two.

[0021] (4) A limiting step is set on the rotating shaft to limit the first connector from the module housing. There is no need to set additional spacers or other partition parts between the first connector and the module housing, which can save costs and improve assembly efficiency.

[0022] (5) The first connector is snapped onto the rotating shaft in the circumferential direction, so that the first connector and the rotating shaft always remain relatively stationary. Therefore, when the drive unit drives the gear set to further drive the first gear disk, it is only necessary to consider the relationship between the damping torque generated by the damping component on one side of the first gear disk and the driving torque formed by the gear set on the first gear disk. The electric drive rotation of the projector relative to the base can be realized. The torque configuration is simple and reliable, and the rotation error of the projector relative to the base caused by the rotating shaft being rotated by the action of the first gear disk and slipping with the first connector during the drive process can be avoided.

[0023] (6) The first gasket located between the first gear disk and the elastic element is engaged with the rotating shaft in the circumferential direction, so that the second fastener will not rotate when the first gear disk rotates relative to the rotating shaft, thus ensuring that the damping assembly can always provide a stable clamping force. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the rotating mechanism of a preferred embodiment of the present invention;

[0025] Figure 2 yes Figure 1 Another structural schematic diagram of the rotating mechanism;

[0026] Figure 3 yes Figure 1 Cross-sectional schematic diagram of the rotating mechanism;

[0027] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 yes Figure 1 A side view of the cross-section of the rotating mechanism;

[0029] Figure 6 yes Figure 1 Exploded view of the rotating mechanism;

[0030] Figure 7yes Figure 6 Enlarged view of point B in the middle;

[0031] Figure 8 yes Figure 1 Another perspective of the exploded structure of the rotating mechanism;

[0032] Figure 9 yes Figure 8 Enlarged diagram of point C in the middle.

[0033] Explanation of icon numbers:

[0034] 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;

[0035] 20. Rotating shaft; 21. First position; 22. Second position; 23. Annular baffle; 24. Limiting step; 25. First tangential plane; 26. Second tangential plane;

[0036] 30. First gear disc; 31. Annular boss; 311. Receiving groove; 32. Gear hole;

[0037] 40. Driving components;

[0038] 50. Gear set; 51. Second gear disc;

[0039] 60. Damping assembly; 61. Elastic element; 62. First washer; 63. Second washer;

[0040] 70. First connecting component;

[0041] 81. First fastener; 82. Second fastener. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Combination Figures 3 to 4 The rotating mechanism includes a module housing 10, a rotating shaft 20, a first gear disk 30, a driving component 40, a gear set 50, a damping component 60, and a first connecting component 70. A receiving cavity is formed in the module housing 10 to accommodate the rotating shaft 20, the first gear disk 30, and the gear set 50. Opposite first support holes 111 and second support holes 121 are formed on the module housing 10. The outer wall of the rotating shaft 20 includes a first position 21 and a second position 22 spaced axially. The rotating shaft 20 rotatably abuts against the wall of the first support hole 111 at the first position 21. The first gear disk 30 is rotatably fitted and connected to the rotating shaft 20 at the second position 22. An annular boss 31 is formed on the side of the first gear disk 30 near the second support hole 121. The outer wall of the annular boss 31 rotatably abuts against the wall of the second support hole 121. The damping component 60 is fitted onto the outer wall of the rotating shaft 20 and abuts against the first gear disk 30, so that the first gear disk 30 and the rotating shaft 20 are damped and rotatably connected. The drive component 40 is disposed on the module housing 10 and is connected to the gear set 50 in a transmission manner. The gear set 50 is connected to the first gear disk 30 in a transmission manner. The first connecting component 70 is disposed on the rotating shaft 20 and is located outside the first support hole 111 of the module housing 10.

[0048] In this design, by having the rotating shaft 20 pass through the first support hole 111 and the second support hole 121, and with the first position 21 and the second position 22 on the outer wall of the rotating shaft 20 being axially spaced as support points, the weight of the projector can be transmitted through the module housing 10 to the first position 21 and the second position 22 of the rotating shaft 20, thus distributing the pressure and effectively preventing the rotating shaft 20 from breaking due to excessive force at a single point. Furthermore, the axial spacing of the first position 21 and the second position 22 along the rotating shaft 20 makes it less prone to shaft eccentricity during transmission. Additionally, there is no need to reserve more space on the rotating shaft 20 to support the module housing 10; the module housing 10 only directly abuts against the rotating shaft 20 through the first position 21 and indirectly abuts against the rotating shaft 20 through the first gear disk 30 at the second position 22. No further axial space is needed at the second position 22 to support the module housing 10. This allows the rotating shaft 20 to be shortened, thereby contributing to a reduction in the overall thickness of the rotating mechanism.

[0049] 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 is formed by splicing a first housing 11 and a second housing 12. A first support hole 111 is formed on the first housing 11, and a second support hole 121 is formed on the second housing 12. The diameter of the second support hole 121 is larger than the diameter of the first support hole 111. The first support hole 111 and the second support hole 121 are generally circular holes. Correspondingly, the size of the annular boss 31 is larger than the size of the rotating shaft 20, which improves the anti-eccentricity capability. 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.

[0050] Combination Figure 5The gear set 50 includes a second gear disk 51. The first side of the first gear disk 30 rotates and abuts against the second inner wall 122 of the module housing 10. The second side of the first gear disk 30 rotates and abuts against the second gear disk 51 and is separated from the first inner wall 112 of the module housing 10. A gear with a radial dimension smaller than the second gear disk 51 is coaxially fixedly connected to the second gear disk 51 on the side close to the first gear disk 30. The gear is located on the same plane as the first gear disk 30 and meshes with the first gear disk 30 to realize transmission. The first gear disk 30 is clamped between the second inner sidewall 122 and the second gear disk 51. The side of the second gear disk 51 away from the first gear disk 30 abuts against the first inner sidewall 112. The first inner sidewall 112 and the second inner sidewall 122 of the module housing 10 are spaced apart and opposite each other. The first support hole 111 is opened in the first inner sidewall 112 and the second support hole 121 is opened in the second inner sidewall 122. The first side and the second side of the first gear disk 30 are opposite sides, and the axes of the first gear disk 30 and the second gear disk 51 are parallel to each other. With this structure, the second housing 12, the first gear disk 30, the second gear disk 51, and the first housing 11 abut against each other in the axial direction of the rotating shaft 20, thereby preventing the rotating shaft 20 from moving in the axial direction. Moreover, with this structural design, the second gear disk 51 in the gear set 50 can provide axial support for the first gear disk 30 without the need for additional support components. Furthermore, the second gear disk 51 and the first gear disk 30 rotate in opposite directions, one rotating counterclockwise and the other clockwise, which reduces friction between them and avoids errors in the transmission.

[0051] 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. The first connecting member 70 is clamped on the first fastener 81 and the limiting step 24. The first fastener 81 can be a nut, a snap ring, or other structure. 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. There is no need to set additional spacers or other partition parts between the first connecting member 70 and the module housing 10, which can save costs and improve assembly efficiency. Figures 6 to 9The 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. For example, a straight edge matching the first tangent plane 25 is formed at the center opening of the first connector 70. This straight edge abuts against the first tangent plane 25 to prevent the first connector 70 from rotating relative to the rotating shaft. The first connector 70 is spaced from the module housing 10 so that no friction is formed between the first connector 70 and the module housing 10 when the first connector 70 rotates with the rotating shaft 20. With this structural design, the base, the first connector 70, and the rotating shaft 20 remain relatively stationary. Therefore, when the drive unit 40 drives the gear set 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 one side of the first gear disk 30 and the driving torque formed by the gear set 50 on the first gear disk 30. This enables the projector to rotate electrically relative to the base. The torque configuration is simple and reliable, and it avoids the rotation error of the projector relative to the base caused by the rotating shaft 20 slipping against the first connector 70 due to the rotation caused by the first gear disk 30 during the drive process of the drive unit 40.

[0052] An annular baffle 23 is provided on the rotating shaft 20. The annular baffle 23 is located between the first gear disk 30 and the first connecting member 70. The damping component 60 abuts against the side of the first gear disk 30 away from the annular baffle 23 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 component 60. The side of the first gear disk 30 facing the first connecting member 70 has a countersunk groove. The countersunk groove is opened around the gear through hole 32, and the shape and size of the countersunk groove match the annular baffle 23, so that the first gear disk 30 can be easily and accurately engaged on the annular baffle 23 during assembly.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] In electric drive mode, the drive unit 40 controls the gear set 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 gear set 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.

[0058] 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 gear set 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 unit 40, gear set 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.

[0059] 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.

[0060] 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.

[0061] 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 driving member, the gear set, the damping assembly and the first connecting member, the module housing is formed with a receiving cavity to accommodate the rotating shaft, the first gear plate and the gear set, and the module housing is provided with opposite first and second support holes; The outer wall of the rotating shaft includes a first position and a second position spaced along the axial direction, the rotating shaft rotates against the hole wall of the first support hole at the first position, the first gear plate is rotatably connected to the second position of the rotating shaft, the side of the first gear plate close to the second support hole is formed with an annular boss, the outer wall of the annular boss rotates against the hole wall of the second support hole, and the damping assembly is sleeved on the outer wall of the rotating shaft and abuts against the first gear plate, so that the first gear plate and the rotating shaft are connected in a damping rotation manner; The driving member is arranged on the module housing and is in transmission connection with the gear set, the gear set is in transmission connection with the first gear plate, and the first connecting member is arranged on the rotating shaft and located outside the first support hole of the module housing.

2. The swivel mechanism of claim 1, wherein The hole diameter of the second support hole is larger than that of the first support hole.

3. The swivel mechanism of claim 1, wherein, The annular boss and the rotating shaft form a receiving groove, and at least part of the damping assembly is arranged in the receiving groove.

4. The swivel mechanism of claim 1, wherein The rotating shaft is provided with an annular baffle between the first gear plate and the first connecting member, and the damping assembly abuts against the side of the first gear plate away from the annular baffle to press the first gear plate against the annular baffle.

5. The swivel mechanism of claim 1, wherein, The gear set includes a second gear plate, the first side of the first gear plate is in rotation abutment with a second inner side wall of the module housing, the second side of the first gear plate is in rotation abutment with the second gear plate and is spaced from a first inner side wall of the module housing, the first gear plate is clamped between the second inner side wall and the second gear plate, and the side of the second gear plate away from the first gear plate is in abutment with the first inner side wall of the module housing, wherein the first inner side wall and the second inner side wall of the module housing are spaced apart, the first support hole is arranged on the first inner side wall, the second support hole is arranged on the second inner side wall, and the first side and the second side of the first gear plate are opposite sides.

6. The swivel mechanism of claim 1, wherein, Further comprising a first fastener, a limiting step is arranged on the rotating shaft at a position outside the first support hole, and the first connecting member is locked to the limiting step by the first fastener and is spaced from the module housing.

7. The swivel mechanism of claim 1, wherein A first cutting plane is arranged on the outer wall of the rotating shaft, and the first connecting member is circumferentially clamped on the first cutting plane to rotate synchronously with the rotating shaft.

8. The swivel mechanism of claim 1, wherein, Further comprising a second fastener, the damping assembly includes an elastic member, the second fastener and the elastic member are respectively sleeved and fixed on the outer wall of the rotating shaft, and the elastic member is clamped between the first gear plate and the second fastener.

9. The swivel mechanism of claim 8, wherein, The damping assembly further comprises a first gasket sleeved on the outer wall of the rotating shaft and clamped between the first gear plate and the elastic member, and the outer wall of the rotating shaft is provided with a second tangent plane, and the first gasket is circumferentially clamped on the second tangent plane to rotate synchronously with the rotating shaft.

10. A projection apparatus, characterized by, The projection host, the base and the rotating mechanism of any one of claims 1 to 9 are included, the first connecting member is fixedly connected to the base, and the projection host is fixedly connected to the module shell.

Images