Rotating mechanism and projection equipment

Abstract

The rotating mechanism comprises a first connecting piece, a second connecting piece, a transmission piece, a driving piece, a first damping piece, a second damping piece, a rotating shaft and a sleeve, a containing groove is formed in one end of the sleeve in the axial direction, and the first connecting piece, the transmission piece and the first damping piece are arranged on the outer wall face of the sleeve in a sleeving mode; the transmission part and the first connecting part are clamped between the sleeve and the first damping part, so that the first connecting part and the sleeve are rotationally connected in a damping manner, and the driving part is arranged on the first connecting part and is in transmission connection with the transmission part; a through hole is formed in the bottom of the containing groove, the rotating shaft penetrates through the through hole from one end of the sleeve and extends into the containing groove, the second connecting piece is clamped between the rotating shaft and the sleeve, the second damping piece is fixedly arranged on the rotating shaft extending into the containing groove in a sleeving mode, and the second damping piece abuts against the bottom of the containing groove. And the rotating shaft and the second connecting piece are rotationally connected with the sleeve in a damping manner. The size of the rotating mechanism in the axial direction can be effectively compressed.

Description

Technical Field

[0001] The present invention relates to the technical field of projection equipment, and in particular to a rotating mechanism and projection equipment. Background Art

[0002] With the development of projector technology, users' demand for automated projection functions has also increased. In particular, since the projection equipment often needs to be tilted toward the projection screen, the projected image will be deformed into a trapezoidal shape, which greatly affects the user's viewing experience. Therefore, in the prior art, the general method is to add an electric pan / tilt to the projection equipment to drive the projection optical machine to rotate relative to the bracket, so that the projection direction of the optical machine reaches a suitable projection angle, so that the shape of the projected image can be improved.

[0003] In order to take into account the convenience of users manually rotating the projection device and prevent the drive motor in the electric pan / tilt head from being damaged when the user manually rotates the projection device, a damping member can be added to the electric drive structure to take into account both electric and manual adjustment. However, since the transmission mechanism combining the electric drive structure and the damping member is large in size, it is easy to interfere with the components in the projection device, making it difficult to further compress the size of the projection device. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a rotating mechanism and a projection device, which can effectively compress the axial size of the rotating mechanism.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In the first aspect, the present invention discloses a rotating mechanism, comprising a first connecting member, a second connecting member, a transmission member, a driving member, a first damping member, a second damping member, a rotating shaft and a sleeve, wherein a receiving groove is provided at one end of the sleeve along the axial direction, and the first connecting member, the transmission member and the first damping member are respectively sleeved on the outer wall surface of the sleeve, wherein the transmission member is connected to the sleeve, and the transmission member and the first connecting member are clamped between the sleeve and the first damping member, so that the first connecting member is connected to the sleeve in a damping rotational connection, and the driving member is arranged on the first connecting member and is transmission-connected to the transmission member; a through hole is formed at the bottom of the receiving groove, the rotating shaft passes through the through hole from one end of the sleeve and extends into the receiving groove, the second connecting member is clamped between the rotating shaft and the sleeve, the second damping member is sleeved and fixed on the rotating shaft extending into the receiving groove, and the second damping member abuts against the bottom of the receiving groove, so that the rotating shaft and the second connecting member are respectively connected to the sleeve in a damping rotational connection.

[0007] Preferably, the first damping member includes a first nut and a first elastic member, the first nut and the first elastic member are respectively sleeved and fixed on the outer wall surface of the sleeve, and the first elastic member is clamped between the transmission member or the first connecting member and the first nut; the second damping member includes a second nut and a second elastic member, the second nut and the second elastic member are respectively sleeved and fixed on the rotating shaft, and the second elastic member is clamped between the bottom of the accommodating groove and the second nut.

[0008] Preferably, the second elastic member is located in the accommodating groove, and at least a portion of the second nut is located in the accommodating groove.

[0009] Preferably, the first damping member also includes a first gasket, which is sleeved on the outer wall surface of the sleeve and clamped between the transmission member or the first connecting member and the first elastic member, and the first gasket is clamped with the sleeve in the circumferential direction to rotate synchronously with the sleeve; the second damping member also includes a second gasket, which is sleeved on the rotating shaft and clamped between the bottom of the accommodating groove and the second elastic member, and the second gasket is clamped with the rotating shaft in the circumferential direction to rotate synchronously with the rotating shaft.

[0010] Preferably, a projection of the first damping element in the radial direction at least partially overlaps with the second damping element.

[0011] Preferably, the first connecting member is located on a side of the transmission member close to the first damping member, and a first flange is formed at the end of the sleeve away from the accommodating groove, and the transmission member is clamped between the first flange and the first connecting member; a step surface is provided on the transmission member, and the first flange abuts against the step surface; a second flange is formed at the end of the rotating shaft, and the second connecting member is sleeved and clamped on the rotating shaft, and the second connecting member is clamped between the second flange and the end of the sleeve away from the accommodating groove.

[0012] Preferably, the first connecting member is provided with a first circular hole, and the first connecting member is rotatably mounted on the outer wall surface of the sleeve through the first circular hole; the through hole is a circular hole, and the sleeve is rotatably mounted on the rotating shaft through the through hole.

[0013] Preferably, the transmission member is circumferentially engaged with the sleeve so as to rotate synchronously with the sleeve; and the second connecting member is circumferentially engaged with the rotating shaft so as to rotate synchronously with the rotating shaft.

[0014] Preferably, the rotating mechanism further comprises a third gasket, the third gasket is sleeved and clamped on the rotating shaft, and the third gasket is clamped between the second connecting member and the end of the sleeve away from the accommodating groove.

[0015] Preferably, the rotating mechanism further comprises a fourth gasket, the fourth gasket is sleeved and clamped on the sleeve, and the fourth gasket is clamped between the transmission member and the first connecting member.

[0016] In a second aspect, the present invention discloses a projection device, comprising a housing, a bracket and the rotating mechanism described in the first aspect, wherein a middle frame is installed in the housing, the first connecting member is fixedly connected to the middle frame, and the second connecting member is fixedly connected to the bracket.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the rotating mechanism and projection equipment proposed in the present invention have a receiving groove on the sleeve along the axial direction, wherein the first damping member is arranged on the outer wall surface of the sleeve outside the receiving groove so that the first connecting member is connected to the sleeve in a damping rotation manner, and the second damping member is at least partially arranged in the receiving groove so that the rotating shaft and the second connecting member are respectively connected to the sleeve in a damping rotation manner, so that various working scenarios can be adapted by adjusting the torque of the two damping members, taking into account both electric and manual adjustment, to prevent the driving member in the electric pan-tilt head from being damaged when the user manually rotates the projection equipment; wherein the two damping members are partially overlapped in the radial direction, so that the axial dimension of the rotating shaft will not be too large, thereby ensuring that the axial dimension of the entire rotating mechanism is effectively compressed.

[0018] In a further solution, a first elastic member is installed on the outer wall surface of the sleeve, and the torque between the first connecting member and the sleeve that are sleeved together on the sleeve is adjusted by turning the knob through the first nut at the tail; a second elastic sheet is installed in the receiving groove of the sleeve, and the torque between the second connecting member and the sleeve that are sleeved together on the rotating shaft is adjusted by turning the knob through the second nut at the tail; the torque and movement mode between the component connected on the outer wall surface of the sleeve and the component installed in the receiving groove of the sleeve are independent of each other, successfully realizing that a rotating shaft has two independent torques. This design enables the torque to be adjusted to adapt to various working scenarios under different transmission requirements, thereby improving the stability and flexibility of the transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a projection device proposed in a preferred embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the internal structure of the housing of the projection device;

[0021] Figure 3 yes Figure 2 A cross-sectional schematic diagram of a rotating mechanism of a projection device;

[0022] Figure 4 yes Figure 3 A schematic diagram of the structure of the sleeve in FIG.

[0023] Figure 5 yes Figure 2 One of the exploded schematic diagrams of the rotating structure of the projection device;

[0024] Figure 6 yes Figure 2 The second exploded diagram of the rotating structure of the projection device;

[0025] Figure 7 yes Figure 2 The assembly diagram of the rotating structure of the projection device;

[0026] Figure 8 yes Figure 1 Schematic diagram of the internal explosion of the housing of the projection device.

[0027] Description of reference numerals:

[0028] 10. Shell; 11. Middle frame; 111. Mounting groove; 112. Avoidance hole; 20. Bracket; 30. Rotation mechanism; 31. First connecting member; 311. First circular hole; 32. Second connecting member; 321. Second limiting hole; 33. Transmission member; 331. Step surface; 332. First limiting hole; 34. First damping member; 341. First nut; 342. First elastic member; 343. First gasket; 35. Second damping member; 351. Second nut; 352. Second elastic member; 353. Second gasket; 36. Rotating shaft; 361. Second flange; 37. Sleeve; 371. Accommodation groove; 372. Through hole; 373. First flange; 38. Third gasket; 39. Fourth gasket; 40. Driving member. DETAILED DESCRIPTION

[0029] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the present invention.

[0030] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit / signal communication.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] like Figure 1 and Figure 2 As shown, a preferred embodiment of the present invention discloses a projection device and a rotation mechanism thereof, wherein the projection device comprises a housing 10, a bracket 20 and a rotation mechanism 30, wherein a middle frame 11 is installed in the housing 10, and the middle frame 11 is used to fix components such as an optical machine and a sound cavity, and the rotation mechanism 30 is connected between the middle frame 11 and the bracket 20. The middle frame 11 can be integrally formed with the housing 10, or detachably connected by fasteners.

[0034] Combination Figure 3 The rotating mechanism 30 includes a first connecting member 31, a second connecting member 32, a transmission member 33, a driving member 40, a first damping member 34, a second damping member 35, a rotating shaft 36 and a sleeve 37. One end of the sleeve 37 is provided with a receiving groove 371 along the axial direction. The first connecting member 31, the transmission member 33 and the first damping member 34 are respectively sleeved on the outer wall surface of the sleeve 37. The outer wall surface of the sleeve 37 is located at the radial periphery of the receiving groove 371. The transmission member 33 is connected to the sleeve 37, and the transmission member 33 and the first connecting member 31 are clamped between the sleeve 37 and the first damping member 34, so that the first connecting member 31 is connected to the sleeve 37 in a damped rotational connection. The driving member 40 is provided on the first connecting member 31 and is transmission-connected to the transmission member 33. Figure 4, a through hole 372 is formed at the bottom of the receiving groove 371, the rotating shaft 36 passes through the through hole 372 from one end of the sleeve 37 and extends into the receiving groove 371, the second connecting member 32 is clamped between the rotating shaft 36 and the sleeve 37, the second damping member 35 is sleeved and fixed on the rotating shaft 36 extending into the receiving groove 371, and the second damping member 35 abuts against the bottom of the receiving groove 371, so that the rotating shaft 36 and the second connecting member 32 are respectively connected to the sleeve 37 for damping rotation. Among them, the first connecting member 31 is fixedly connected to the middle frame 11, and the second connecting member 32 is fixedly connected to the bracket 20, so that the rotating mechanism 30 is connected between the middle frame 11 and the bracket 20. It should be noted that the way in which the first connecting member 31 is fixedly connected to the middle frame 11 includes a detachable connection between the two and an integrally formed connection. Further, the way in which the driving member 40 is arranged on the first connecting member 31 may include a case in which the driving member 40 is fixedly connected to the middle frame 11. Similarly, the second connecting member 32 is fixedly connected to the bracket 20, including a detachable connection and an integral connection. In one embodiment, the first connecting member 31 can also be understood as the middle frame 11 and / or the housing 10 of the projection device.

[0035] The first damping member 34 includes a first nut 341 and a first elastic member 342, which are respectively sleeved and fixed on the outer wall of the sleeve 37, and the first elastic member 342 is clamped between the first connecting member 31 and the first nut 341; further, the first damping member 34 also includes a first gasket 343, which is sleeved on the outer wall of the sleeve 37 and clamped between the first connecting member 31 and the first elastic member 342, and the first gasket 343 is clamped with the sleeve 37 in the circumferential direction to rotate synchronously with the sleeve 37. The outer wall of the sleeve 37 is formed with a thread, and the sleeve 37 passes through the transmission member 33 and the first connecting member 31. The first damping member 34 is threadedly connected to the thread on the outer wall of the sleeve 37, and the first damping member 34 is fixed to the sleeve 37 and abuts against the first connecting member 31.

[0036] The second damping member 35 includes a second nut 351 and a second elastic member 352, which are respectively sleeved and fixed on the rotating shaft 36, and the second elastic member 352 is clamped between the bottom of the receiving groove 371 and the second nut 351. The second elastic member 352 is located in the receiving groove 371, and at least a portion of the second nut 351 is located in the receiving groove 371. Further, the second damping member 35 also includes a second gasket 353, which is sleeved on the rotating shaft 36 and clamped between the bottom of the receiving groove 371 and the second elastic member 352. The second gasket 353 is engaged with the rotating shaft 36 in the circumferential direction so as to rotate synchronously with the rotating shaft 36. The outer wall surface of the rotating shaft 36 is formed with a thread, and the second damping member 35 is threadedly connected to the rotating shaft 36 extending into the receiving groove 371, and the second damping member 35 is fixed to the rotating shaft 36 and abuts against the bottom of the receiving groove 371. In some embodiments, in order to realize the circumferential clamping with other elements, so that the elements in the circumferential clamping relationship and the sleeve 37 and the rotating shaft 36 always rotate synchronously, the outer wall surfaces of the sleeve 37 and the rotating shaft 36 can be set to non-circular symmetrical surfaces, for example Figure 4 The cylindrical surface shown in the embodiment forms planes on two opposite sides in the radial direction, and a non-circularly symmetrical hole of a corresponding shape is formed in the element to be sleeved on the outer wall surface of the sleeve 37 and the rotating shaft 36, so that the two can be clamped in the circumferential direction. In some embodiments, the element that has a circumferential clamping relationship with the sleeve 37 may include a transmission member 33 and a first damping member 34; the element that has a circumferential clamping relationship with the rotating shaft 36 may include a second connecting member 32 and a second damping member 35. In this specific embodiment, in order to enable the first damping member 34 to be fixed on the sleeve 37, the outer wall surface of the sleeve 37 forms a thread on the cylindrical surface; in order to enable the second damping member 35 to be fixed on the rotating shaft 36, the outer wall surface of the rotating shaft 36 forms a thread on the cylindrical surface.

[0037] Among them, the first elastic member 342 and the second elastic member 352 can, for example, adopt bowl-shaped washers or other types of elastic washer structures. The deformation degree of the first elastic member 342 can be adjusted by rotating the first nut 341, and then the friction torque between the first connecting member 31 and the transmission member 33 can be adjusted; similarly, the deformation degree of the second elastic member 352 can be adjusted by rotating the second nut 351, and then the friction torque between the second connecting member 32 and the sleeve 37 can be adjusted.

[0038] Furthermore, in addition to the first gasket 343 clamped between the first connecting member 31 and the first elastic member 342, the first gasket 343 is also clamped between the first elastic member 342 and the first nut 341, and each first gasket 343 is sleeved on the sleeve 37 and rotates synchronously with the sleeve 37; specifically, the center of each first gasket 343 is a non-circularly symmetrical hole, which matches the contour of the outer wall of the sleeve 37, so that it can always rotate synchronously with the sleeve 37, and the first nut 341 is fixed on the sleeve 37 and is located on the side of the first gasket 343 away from the first connecting member 31, so that even if the first connecting member 31 rotates relative to the sleeve 37, the first connecting member 31 will not drive the first nut 341 to rotate, and the first nut 341 and the first gasket 343 can always rotate synchronously with the sleeve 37, so that the first nut 341 will not be loosened due to circumferential force during rotation. Similarly, in addition to the second gasket 353 being clamped between the bottom of the accommodating groove 371 and the second elastic member 352, the second gasket 353 is also clamped between the second elastic member 352 and the second nut 351, and each second gasket 353 is sleeved on the rotating shaft 36 and rotates synchronously with the rotating shaft 36; specifically, the center of each second gasket 353 is a non-circularly symmetrical hole, which matches the contour of the outer wall surface of the rotating shaft 36, so that it can always rotate synchronously with the rotating shaft 36, and the second nut 351 is fixed on the rotating shaft 36 and is located on the side of the second gasket 353 away from the bottom of the accommodating groove 371, so that even if the sleeve 37 rotates relative to the rotating shaft 36, the sleeve 37 will not drive the second nut 351 to rotate, and the second nut 351 and the second gasket 353 can always rotate synchronously with the rotating shaft 36, so that the second nut 351 will not be loosened due to circumferential force during rotation.

[0039] Combination Figure 5 and Figure 6 The first connecting member 31 is located on the side of the transmission member 33 close to the first damping member 34, and the end of the sleeve 37 away from the receiving groove 371 forms a first flange 373, and the transmission member 33 is clamped between the first flange 373 and the first connecting member 31; the transmission member 33 is provided with a step surface 331, and the first flange 373 abuts against the step surface 331, so that the transmission member 33 is restricted from axial movement; the end of the rotating shaft 36 forms a second flange 361, and the second connecting member 32 is sleeved and clamped on the rotating shaft 36, and the second connecting member 32 is clamped between the second flange 361 and the end of the sleeve 37 away from the receiving groove 371. Further, in some embodiments, the first connecting member 31 and the second connecting member 32 are respectively plate-shaped structures, and are respectively located on opposite sides of the transmission member 33, and the rotating shaft 36 and the sleeve 37 both pass through the transmission member 33.

[0040] Combination Figure 6 and Figure 7The first damping member 34 is used to press the transmission member 33 and the first connecting member 31 against the first flange 373 of the sleeve 37, wherein the first connecting member 31 is provided with a first circular hole 311, and the first circular hole 311 is a circular through hole. The first connecting member 31 can be rotatably mounted on the outer wall surface of the sleeve 37 relative to the sleeve 37 through the first circular hole 311, and the transmission member 33 rotates synchronously with the sleeve 37; the second damping member 35 is used to press the second connecting plate 32 against the sleeve 37 through the rotating shaft 36, wherein the through hole 372 is a circular hole. The sleeve 37 can be rotatably mounted on the rotating shaft 36 relative to the rotating shaft 36 through the through hole 372, and the second connecting member 32 rotates synchronously with the rotating shaft 36.

[0041] The transmission member 33 is circumferentially engaged with the sleeve 37 to rotate synchronously with the sleeve 37; specifically, the transmission member 33 is engaged with the sleeve 37 by a rectangular hole sleeve, wherein a first limiting hole 332 is provided on the transmission member 33, and the first limiting hole 332 in this embodiment is a non-circularly symmetrical hole, for example, the upper and lower sides are straight sides, and the left and right sides are arc sides, and its shape matches the profile of the outer wall surface of the sleeve 37, so that the transmission member 33 can rotate synchronously with the sleeve 37. The second connecting member 32 is circumferentially engaged with the rotating shaft 36 to rotate synchronously with the rotating shaft 36; specifically, the second connecting member 32 is engaged with the rotating shaft 36 by a rectangular hole sleeve, wherein a second limiting hole 321 is provided on the second connecting member 32, and the second limiting hole 321 in this embodiment is a non-circularly symmetrical hole, for example, the upper and lower sides are arc sides, and the left and right sides are straight sides, and its shape matches the profile of the outer wall surface of the rotating shaft 36, so that the second connecting member 32 can rotate synchronously with the rotating shaft 36.

[0042] The rotating mechanism 30 further includes a third gasket 38 and a fourth gasket 39. The third gasket 38 is sleeved and clamped on the rotating shaft 36 and rotates synchronously with the rotating shaft 36, and the third gasket 38 is clamped between the second connecting member 32 and the end of the sleeve 37 away from the accommodating groove 371; the fourth gasket 39 is sleeved and clamped on the sleeve 37 and rotates synchronously with the sleeve 37, and the fourth gasket 39 is clamped between the transmission member 33 and the first connecting member 31. By providing these gaskets, the friction loss caused by the relative rotation between the components can be reduced.

[0043] Combination Figure 8In one embodiment, a rectangular mounting groove 111 is formed on the side of the middle frame 11, and the first connecting member 31 of a matching rectangular shape in the rotating mechanism 30 is just adapted to be installed in the mounting groove 111, and is locked in the mounting groove 111 by a fastener, further preventing the first connecting member 31 from rotating relative to the middle frame 11, thereby improving the stability of the installation; the second connecting member 32 on the rotating mechanism 30 is locked on the bracket 20 by a fastener. A avoiding hole 112 is provided at the bottom of the mounting groove 111 to provide an installation space for the rotating mechanism 30. Furthermore, a driving member 40 is also provided on the middle frame 11, specifically, the transmission member 33 is a transmission gear structure, the driving member 40 is a motor, and the output shaft of the driving member 40 is directly or through a gear in transmission connection with the transmission member 33.

[0044] The projection device and the rotating mechanism thereof provided in the preferred embodiment of the present invention have an accommodating groove 371 axially opened at one end of the sleeve 37, wherein the second damping member is arranged in the accommodating groove 371, and the first damping member 34 is sleeved on the outer wall surface of the sleeve 37 outside the accommodating groove 371, so that the two groups of damping members are arranged opposite to each other in the radial direction, that is, the radial projection of the first damping member 34 at least partially overlaps with the second damping member 35, thereby reducing the space occupied by the rotating mechanism in the axial direction.

[0045] The working principles of the projection device and its rotating mechanism provided by the preferred embodiment of the present invention are as follows.

[0046] First, when the housing 10 of the electric drive projection device rotates, the driving member 40 drives the transmission member 33 to rotate. Since the first connecting member 31 is locked on the middle frame 11, the driving member 40 will rotate along the circumference of the transmission member 33, and the first connecting member 31 will also rotate relative to the transmission member 33. At the same time, the transmission member 33 will remain relatively stationary with the sleeve 37 due to the rectangular hole limit. The rotation torque transmitted by the driving member 40 to the transmission member 33 is greater than the friction torque between the transmission member 33 and the first connecting member 31 and the friction torque between the first damping member 34 and the first connecting member 31; at the same time, the transmission torque is smaller than the friction torque between the second connecting member 32 and the sleeve 37. Therefore, the transmission member 33 can rotate relative to the first connecting member 31, and rotate synchronously with the second connecting member 32, which is finally reflected in that the housing 10, the middle frame 11, the driving member 40, and the first connecting member 31 are relatively stationary, but rotate relative to the transmission member 33, the sleeve 37, the rotating shaft 36, the bracket 20, and the second connecting member 32. That is, when the electric drive rotates the housing 10 of the projection device, the housing 10, the middle frame 11, the driving member 40, and the first connecting member 31 are a relatively stationary first group of structures, and the transmission member 33, the sleeve 37, the rotating shaft 36, the bracket 20, and the second connecting member 32 are a relatively stationary second group of structures, wherein the first group of structures rotates relative to the second group of structures.

[0047] Second, when the user applies force to the housing 10 of the projection device to manually adjust the angle of the housing 10 relative to the bracket 20, the transmission torque applied by the housing 10 and the middle frame 11 to the first connecting member 31 is less than the friction torque between the first connecting member 31 and the transmission member 33; at the same time, the transmission torque transmitted to the sleeve 37 is greater than the friction torque between the sleeve 37 and the second connecting member 32 and the friction torque between the second damping member 35 and the sleeve 37. Therefore, the transmission member 33, the driving member 40, and the sleeve 37 rotate synchronously with the first connecting member 31, and rotate relative to the second connecting member 32 and the rotating shaft 36. The final embodiment is that the housing 10, the middle frame 11, the driving member 40, the first connecting member 31, the transmission member 33, and the sleeve 37 are relatively stationary, but rotate relative to the rotating shaft 36, the bracket 20, and the second connecting member 32. That is, when the user applies force to the housing 10 of the projection device to manually adjust the angle of the housing 10 relative to the bracket 20, the housing 10, the middle frame 11, the driving member 40, the first connecting member 31, the transmission member 33, and the sleeve 37 are a relatively stationary third group of structures, the rotating shaft 36, the bracket 20, and the second connecting member 32 are a relatively stationary fourth group of structures, and the third group of structures rotates relative to the fourth group of structures.

[0048] The rotating mechanism 30 in the projection device provided in the preferred embodiment of the present invention is an integrated electric and manual structure, wherein two damping members (i.e., a first damping member 34 and a second damping member 35) with different radial sizes are provided on the rotating shaft 36, and the large damping member (the first damping member 34) is located radially outside the small damping member (the second damping member 35), and the two damping members are partially overlapped in the radial space, so that the axial size of the rotating shaft 36 will not be too large, thereby ensuring that the axial size of the entire rotating mechanism 30 is effectively compressed.

[0049] In the preferred embodiment of the present invention, the gear structure and the dual-torque shaft are innovatively integrated into a transmission assembly, wherein the two shaft structures with different radial sizes (sleeve 37 is the large shaft, shaft 36 is the small shaft) and the gear (transmission member 33) are designed as one component, specifically adopting the method of connecting the large shaft to the small shaft. Further, the second elastic member 352 and the second gasket 353 are installed inside the large shaft (outside the small shaft), and the torque of the related components connected to the small shaft (shaft 36) is adjusted by the knob through the second nut 351 at the tail; similarly, the first elastic member 342 and the first gasket 343 are installed outside the large shaft, and the torque of the related components connected to the large shaft (sleeve 37) is adjusted by the knob through the first nut 341 at the tail. It should be noted that the internal and external forces and movement modes of the large shaft (sleeve 37) are independent of each other, thereby successfully realizing that a gear shaft has two independent torques; this design enables various working scenarios to be adapted by adjusting the torque under different transmission requirements, thereby improving the stability and flexibility of the transmission.

[0050] The background section of the present invention may contain background information about the problem or environment of the present invention, rather than describing the prior art by others. Therefore, the content contained in the background section is not an admission by the applicant that the prior art is available.

[0051] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description of reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of mutual contradiction, the technical personnel in this field can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope defined by the attached claims.

Claims

1. A rotating mechanism, characterized in that: The invention comprises a first connecting member, a second connecting member, a transmission member, a driving member, a first damping member, a second damping member, a rotating shaft and a sleeve, wherein one end of the sleeve is provided with a receiving groove along the axial direction. The first connecting member, the transmission member and the first damping member are respectively sleeved on the outer wall surface of the sleeve, and the transmission member and the first connecting member are clamped between the sleeve and the first damping member, so that the first connecting member is connected to the sleeve in a damping rotation manner, and the driving member is provided on the first connecting member and is in transmission connection with the transmission member; A through hole is formed at the bottom of the accommodating groove, the rotating shaft passes through the through hole from one end of the sleeve and extends into the accommodating groove, the second connecting member is clamped between the rotating shaft and the sleeve, the second damping member is sleeved and fixed on the rotating shaft extending into the accommodating groove, and the second damping member is abutted against the bottom of the accommodating groove, so that the rotating shaft and the second connecting member are respectively connected to the sleeve for damping rotation.

2. The rotating mechanism according to claim 1, characterized in that: The first damping member includes a first nut and a first elastic member, the first nut and the first elastic member are respectively sleeved and fixed on the outer wall surface of the sleeve, and the first elastic member is clamped between the transmission member or the first connecting member and the first nut; The second damping member includes a second nut and a second elastic member, the second nut and the second elastic member are respectively sleeved and fixed on the rotating shaft, and the second elastic member is clamped between the bottom of the accommodating groove and the second nut.

3. The rotating mechanism according to claim 2, characterized in that: The second elastic member is located in the accommodating groove, and at least a portion of the second nut is located in the accommodating groove.

4. The rotating mechanism according to claim 2, characterized in that: The first damping member further includes a first gasket, which is sleeved on the outer wall surface of the sleeve and clamped between the transmission member or the first connecting member and the first elastic member, and the first gasket is clamped with the sleeve in the circumferential direction to rotate synchronously with the sleeve; The second damping member further includes a second gasket, which is sleeved on the rotating shaft and clamped between the bottom of the accommodating groove and the second elastic member. The second gasket is circumferentially engaged with the rotating shaft to rotate synchronously with the rotating shaft.

5. The rotating mechanism according to claim 1, characterized in that: A projection of the first damping element in the radial direction at least partially overlaps with the second damping element.

6. The rotating mechanism according to claim 1, characterized in that: The first connecting member is located on a side of the transmission member close to the first damping member, the end of the sleeve away from the accommodating groove forms a first flange, and the transmission member is clamped between the first flange and the first connecting member; a step surface is provided on the transmission member, and the first flange abuts against the step surface; The end of the rotating shaft forms a second flange, the second connecting piece is sleeved and clamped on the rotating shaft, and the second connecting piece is clamped between the second flange and the end of the sleeve away from the accommodating groove.

7. The rotating mechanism according to claim 1, characterized in that: The first connecting member is provided with a first circular hole, and the first connecting member is rotatably mounted on the outer wall surface of the sleeve through the first circular hole; the through hole is a circular hole, and the sleeve is rotatably mounted on the rotating shaft through the through hole.

8. The rotating mechanism according to claim 1, characterized in that: The transmission member is clamped with the sleeve in the circumferential direction so as to rotate synchronously with the sleeve; the second connecting member is clamped with the rotating shaft in the circumferential direction so as to rotate synchronously with the rotating shaft.

9. The rotating mechanism according to claim 1, characterized in that: It also includes a third gasket, which is sleeved and clamped on the rotating shaft, and the third gasket is clamped between the second connecting member and the end of the sleeve away from the accommodating groove; and / or, It also includes a fourth gasket, which is sleeved and clamped on the sleeve, and the fourth gasket is clamped between the transmission member and the first connecting member.

10. A projection device, characterized in that: It comprises a housing, a bracket and the rotating mechanism according to any one of claims 1 to 9, wherein a middle frame is installed in the housing, the first connecting member is fixedly connected to the middle frame, and the second connecting member is fixedly connected to the bracket.

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