Rotary connecting assembly, manual-automatic integrated rotating mechanism and projector

Abstract

The utility model belongs to the technical field of projectors, and discloses a rotary connecting assembly, a manual-automatic integrated rotating mechanism and a projector, a first connecting part, a second connecting part and a retaining assembly are arranged on a rotating shaft, and the retaining assembly enables the rotation damping T2 of the second connecting part relative to the rotating shaft to be larger than the rotation damping T1 of the first connecting part relative to the rotating shaft. In this way, when different acting forces act on the projector, the projector can move relative to the supporting component, and then the projector can rotate on the supporting component through different acting forces by rotating the connecting assembly. And a manual driving mode and an electric driving mode are provided for the projector on the supporting vertical frame, so that pitching adjustment of the machine body is achieved, and the user experience is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of projectors, and in particular relates to a rotating connection component, a manual-automatic rotating mechanism and a projector. Background Art

[0002] Among smart devices such as projectors, there are currently few smart projectors that can perform pitch motion by rotating the body. They are connected between the support component and the projector body through a rotating assembly that mainly includes a rotating shaft. Most projector models with this type of rotating structure are manually driven to achieve pitch motion, and can only rotate under one force such as manually applied pressure, and cannot perform pitch motion under the drive of different forces such as electric driving force, which limits the user's operational flexibility and efficiency. Utility Model Content

[0003] In view of this, an object of the present invention is to provide a rotating connection assembly, a manual-automatic rotating mechanism and a projector, so that target component 1 and target component 2 can rotate relative to each other under different forces.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In a first aspect, a rotating connection assembly is provided, comprising: a rotating shaft; a connection assembly, which is arranged on the rotating shaft and comprises a first connection portion and a second connection portion, wherein the first connection portion and the second connection portion are respectively rotatably matched with the rotating shaft, and the first connection portion is used to connect with a target component one, and the second connection portion is used to connect with a target component two; and a retaining assembly, which is arranged between the rotating shaft and the connection assembly, and under the action of the retaining assembly, the rotational damping of the first connection portion relative to the rotating shaft is T1, the rotational damping of the second connection portion relative to the rotating shaft is T2, and T2>T1.

[0006] Through the above technical solution, the holding component can make the first connection part and the second connection part arranged on the rotating shaft have rotation damping T1 and T2 respectively, and T2>T1. Since the first connection part is connected to the target component one and the second connection part is connected to the target component two, when a force (such as a manual force) acts on the target component two, because of the relationship of T2>T1, the first connection part will rotate before the second connection part, that is, only the first connection part rotates relative to the rotating shaft, and the second connection part and the holding component will remain stationary relative to the rotating shaft, so that when a force acts on the target component two, it rotates relative to the target component one; and when another force (such as an electric driving force) greater than T2 and less than (T2+T1) acts on the target component two to rotate around the rotating shaft, T2 is overcome first and then the target component two is driven to rotate relative to the target component one. At this time, only the second connection part rotates relative to the rotating shaft, and the first connection part and the holding component remain stationary relative to the rotating shaft, and finally it is achieved that when different forces act on the same target component, it can be relatively rotated relative to another target component, such as manual and electric drive, so that the functions of the two do not affect each other.

[0007] In a possible implementation, the retaining assembly includes a friction component, and the friction component is pressed against a surface of the first connecting portion and / or a surface of the second connecting portion.

[0008] Through the above technical solution, the friction component is pressed against the surface of the first connection part and / or the surface of the second connection part, so that the friction component can create resistance or rotation damping between the first connection part and the second connection part.

[0009] In a possible implementation, the friction component is a friction gasket sleeved on the rotating shaft, the friction gasket and the rotating shaft do not rotate relative to each other, the first connecting part and the second connecting part are both disc-shaped structures, and the friction gasket is pressed against the axial disc surface of the first connecting part and / or the second connecting part.

[0010] Through the above-mentioned technical solution, a friction gasket sleeved on the rotating shaft is used as a friction gasket, which can be pressed more stably in the axial direction, and the friction gasket with a disc structure can have a larger friction surface or contact surface in contact with the first connecting part and / or the second connecting part, thereby changing the contact area or setting the friction structure to achieve the required rotational damping.

[0011] In a possible implementation, a limiting portion is provided at one end of the rotating shaft, and a holding piece is threadedly engaged at the other end, and the first connecting portion, the second connecting portion and each of the friction pads are simultaneously pressed on the rotating shaft between the limiting portion and the holding piece by the holding piece; the rotating shaft is also provided with a plurality of spring sheets that are pressed between the holding piece and the friction pads by the holding piece.

[0012] Through the above-mentioned technical solution, the limiting part and the holding part of the rotating shaft can form a holding structure, so that the first connecting part, the second connecting part, the friction gasket and the spring sheet can be pressed on the rotating shaft, and the friction gasket can squeeze the first connecting part and the second connecting part under the pressure provided by the holding part. The friction component can be pressed against the axial end faces of the first connecting part and the second connecting part, so that the first connecting part and the second connecting part have rotational damping when they rotate around the rotating shaft. At the same time, the spring sheet can provide elastic buffering in the axial direction, and the spring sheet can make the clamping force adjustment more precise.

[0013] In a possible implementation, a contact area between the axial end surface of the first connecting portion and the friction pad is smaller than a contact area between the axial end surface of the second connecting portion and the friction pad.

[0014] Through the above technical solution, the axial end faces of the first connecting part and the second connecting part contact the friction pad through different contact areas, so that the rotational damping T1 of the first connecting part relative to the rotating shaft can be smaller than the rotational damping T2 of the second connecting part relative to the rotating shaft, and based on such a damping relationship, it is beneficial to realize the rotation of the target component two relative to the target component one under different forces.

[0015] In a possible implementation, a plurality of first oil storage grooves are distributed in a circumferential array on the axial end surface where the first connecting portion contacts the friction pad, and a plurality of second oil storage grooves are distributed in a circumferential array on the axial end surface where the second connecting portion contacts the friction pad, and the number and / or area of ​​the first oil storage grooves are greater than the number and / or area of ​​the second oil storage grooves.

[0016] Through the above-mentioned technical scheme, the first oil storage tank of the first connecting part and the second oil storage tank on the second connecting part can reduce the contact area between them and the friction pad, and then the distribution number and / or area size of the first oil storage tank can be changed so that the contact areas of the first connecting part and the second connecting part of equal size are different, thereby achieving that the rotational damping T2 of the second connecting part relative to the rotating shaft is greater than the rotational damping of the first connecting part relative to the rotating shaft, and the first oil storage tank and the second oil storage tank can be used to store lubricating oil, so that the wear of the friction surface can be reduced during the friction process.

[0017] In a possible implementation, the first connection portion is provided with a first limiting portion, and the second connection portion is provided with a second limiting portion, and the second limiting portion and the first limiting portion form a limiting relationship in the circumferential direction to limit the relative rotation of the first connection portion and the second connection portion within a rotation angle range.

[0018] Through the above technical solution, the first limiting portion arranged on the first connecting portion can form a limiting relationship with the second limiting portion on the second connecting portion in the circumferential direction, thereby allowing the target component 2 to rotate relative to the target component 1 within a preset reasonable angle range.

[0019] In a possible implementation, the connection assembly further includes a third connection portion that is circumferentially stopped with the rotating shaft, and the rotation drive device mounted on the second target component is transmission-connected to the third connection portion.

[0020] Through the above-mentioned technical solution, the third connecting part is used for transmission connection with the rotation driving device. Under the drive of the rotation driving device, the target component two can rotate around the rotation axis, thereby realizing rotation under different forces, that is, electric rotation relative to manual rotation, thereby realizing adjustment of pitch action.

[0021] In a possible implementation, the rotating shaft is a circular shaft structure with a flat position, the first connecting part and the second connecting part are both provided with circular shaft holes and rotatably cooperate with the rotating shaft through the circular shaft holes, and the third connecting part is provided with a flat shaft hole and is stopped circumferentially with the rotating shaft through the flat shaft hole.

[0022] Through the above technical solution, a rotating shaft with a round shaft structure having a flat position is adopted, which can be conveniently connected to the first connecting part and the second connecting part for rotation, and can also have a third connecting part with a flat shaft hole that cooperates with each other for locking cooperation, that is, relatively fixed, so that better cooperation can be achieved in the presence of rotational damping.

[0023] In a second aspect, a manual-automatic rotating mechanism is also provided, comprising:

[0024] A rotating connection assembly as in any one of the above technical solutions;

[0025] The second target component is a target device, and the first target component is a supporting component that supports the target device.

[0026] Through the above technical solution, the support component and the target device connected together by the above-mentioned rotating connection assembly are enabled to realize rotation of the target device on the support component under different forces, such as adjusting the pitch action by rotating manually and electrically respectively, thereby improving the user experience.

[0027] In a possible implementation, it further includes a rotation driving device installed on the target device, the rotation driving device is connected to a gear, and the gear is meshed with a gear wheel fixed to the rotating shaft.

[0028] Through the above technical solution, the driving device installed on the target device is used to drive the target device to rotate around the rotating shaft, and its output end is connected to the gear and engages with the toothed disk fixed on the rotating shaft or fixed on the third connecting part through the gear. When the driving device is driven, it can drive the target device to rotate around the rotating shaft relative to the supporting component, and adopts a manual-automatic rotation structure. When manually rotated, there will be no difference in feel due to the gear meshing gap, and no tooth collision sound caused by the gear and the rotating shaft gear eliminating the tooth gap.

[0029] In a third aspect, a projector is also provided, characterized in that it comprises: a projector body; and a supporting stand, which is connected to the projector body through the manual-automatic rotating mechanism as described in the above technical solution.

[0030] Through the above technical solution, the projector body and the supporting stand are connected by a manual-automatic rotating mechanism, so that the projector body can be tilted manually and automatically by electric power, thereby maximizing the user experience.

[0031] In a possible implementation, one side of the projector is connected to the support stand via the manual-automatic rotating mechanism, and the other opposite side of the projector is rotatably connected to the support stand via a connecting member;

[0032] The connecting component includes a fixed shaft and a shaft end retaining ring, the fixed shaft has a holding portion, a rotating fitting portion and a limiting end distributed along the axial direction, wherein the holding portion is formed by extending radially and is connected to the supporting stand, the rotating fitting portion is rotationally fitted with the shell of the projector body, and the shell is pressed between the shaft end retaining ring and the limiting end; the inner side of the shaft end retaining ring is provided with an inner edge distributed along a partial circumference, and a locking position is provided at one end of the inner edge, and the length of the holding portion is smaller than the inner diameter of the shaft end retaining ring and larger than the inner diameter of the inner edge, so that it can pass through the shaft end retaining ring and switch between an unlocking position and a locking position relative to the inner edge.

[0033] Through the above technical scheme, one side connected by the manual-automatic rotating mechanism can realize the functions of manual and electric pitch without interfering with each other, and the other side can be easily rotated through the connecting member; the fixed axis of the connecting member can be rotatably matched with the projector shell, and its holding portion can make the shell be pressed between the shaft end retaining ring and the limit end, and the shaft end retaining ring can separate the shell from the supporting component and avoid wear caused by hard contact, and by arranging an inner edge on the inner side of the shaft end retaining ring, the inner edge can cooperate with the holding portion formed by radial extension to facilitate disassembly and assembly, and the shaft end retaining ring can be used to tighten and clamp the side arm of the top shell of the whole machine, and play a certain role in correcting the rotating shaft.

[0034] In a possible implementation, the connecting component further includes a detection element and a detection baffle capable of triggering the detection element, the detection element is disposed on the projector body, and the detection baffle is connected to the fixed shaft.

[0035] Through the above technical solution, the detection element cooperates with the detection baffle to realize pitch in-position sensing. The pitch in-position sensing is realized by the cooperation of the detection baffle and the detection element installed on the top cover of the whole machine. When the whole machine is pitched and rotated into position, the detection baffle passes through the center of the card slot of the detection element, thereby triggering the detection element to generate an in-position signal. After receiving the signal, the controller of the projector body can control the rotation drive device to stop driving, and finally realize automatic stop in position.

[0036] Compared with the prior art, the utility model has the following beneficial effects:

[0037] The rotating connection component, manual-automatic rotating mechanism and projector of the utility model are provided with a first connection part, a second connection part and a retaining component on the rotating shaft. The retaining component can make the rotation damping T2 of the second connection part relative to the rotating shaft greater than the rotation damping T1 of the first connection part relative to the rotating shaft. In this way, when different forces act on the projector respectively, the projector can move relative to the supporting component. Furthermore, the projector can be rotated on the supporting component by different forces through the rotating connection component. It also provides the projector with manual and electric driving modes on the supporting stand to achieve the pitch adjustment of the fuselage, thereby improving the user experience.

[0038] Moreover, the projector can be tilted manually without the problem of poor feel caused by gear meshing clearance, and without the sound of teeth hitting each other caused by the elimination of the gear clearance between the motor output gear and the shaft gear. Finally, the manual and automatic functions are not affected by each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A stereoscopic view of a projector;

[0040] Figure 2 A three-dimensional cross-sectional view of a projector;

[0041] Figure 3 for Figure 2 A partial enlarged schematic diagram of a connecting component part;

[0042] Figure 4 for Figure 3 A three-dimensional schematic diagram of the connecting component shown.

[0043] Figure 5 for Figure 2 A partial enlarged schematic diagram of the manual-automatic rotating mechanism;

[0044] Figure 6 It is a three-dimensional view of a manual-automatic rotating mechanism;

[0045] Figure 7 A stereoscopic view of a rotating connection component at a first viewing angle;

[0046] Figure 8 is a stereoscopic view of a rotating connection component at a second viewing angle;

[0047] Fig. 9 is a three-dimensional cross-sectional view of a rotating connection assembly;

[0048] Fig.10 It is a schematic diagram of a limiting structure of a first connecting part and a second connecting part of a rotating connecting assembly;

[0049] Fig.11 It is an exploded schematic diagram of a first connection part and a second connection part of a rotating connection assembly;

[0050] Fig.12 A three-dimensional view of a friction pad of a rotating connection assembly;

[0051] Fig.13 A three-dimensional view of a rotating shaft of a rotating connection assembly;

[0052] In the figure: 1-projector body; 11-housing; 2-support stand; 3-manual-automatic rotating mechanism; 31-rotating shaft; 311-limiting part; 312-positioning shaft; 32-first connecting part; 321-first limiting part; 322-first oil storage tank; 33-second connecting part; 331-second limiting part; 332-second oil storage tank; 34-third connecting part; 35-toothed disc; 36-friction gasket; 37-spring; 38-gear; 39-motor; 310-pressing part; 3100-positioning seat; 4-connecting member; 41-fixed shaft; 411-pressing part; 412-limiting end; 42-shaft end retaining ring; 421-inner edge; 422-locking position; 43-detection baffle; 44-detection element. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0054] Please refer to Figure 1 and Figure 2 As shown, an embodiment of the present application provides a projector, including a projector body 1 and a support stand 2 , wherein the support stand 2 is connected to the projector body via a manual-automatic rotating mechanism 3 .

[0055] The projector body 1 is connected to the support stand 2 through the manual-automatic rotating mechanism 3, so as to rotate on the support stand 2, and then adjust the pitch motion by rotating under the action of external force. The projector can also be other target devices, such as instruments, laptops, fans and other devices that need to be rotated and adjusted, without limitation.

[0056] Please refer to Figure 5 and Figure 6 As shown, in an embodiment of the present application, the manual-automatic rotating mechanism 3 includes a rotating connection assembly; the projector body 1 connected to the rotating connection assembly is connected to the supporting stand 2 supporting the projector body 1 through the rotating connection group.

[0057] The projector body adopts a manual-automatic rotating structure, which can realize automatic tilt while taking into account manual tilt, and the two do not interfere with each other.

[0058] Specifically, the manual-automatic rotating mechanism 3 further includes a rotating driving device installed on the projector body 1, and the rotating driving device is connected to a gear 38, and the gear 38 is meshed with a gear plate 35 fixed to the rotating shaft 31. In this way, the gear 38 is driven by a driving device such as a motor 39, and the gear 38 can be meshed with the gear 38 fixed to the rotating shaft 31. Since the rotating driving device is installed on the projector body 1, the rotating driving device can drive the projector body 1 to rotate around the rotating shaft 31 to achieve automatic pitch.

[0059] Please refer to Figure 7-9 As shown, the rotating connection component includes: a rotating shaft 31; a connecting component, which is arranged on the rotating shaft 31 and includes a first connecting part 32 and a second connecting part 33, wherein the first connecting part 32 and the second connecting part 33 are respectively rotatably matched with the rotating shaft 31, and the first connecting part 32 is used to connect with the supporting stand 2, and the second connecting part 33 is used to connect with the projector body 1; and a retaining component, which is arranged between the rotating shaft 31 and the connecting component, and under the action of the retaining component, the rotation damping of the first connecting part 32 relative to the rotating shaft 31 is T1, and the rotation damping of the second connecting part 33 relative to the rotating shaft 31 is T2, and T2>T1.

[0060] The holding component can make the first connection part 32 and the second connection part 33 arranged on the rotating shaft 31 have rotation damping T1 and T2 respectively, and T2>T1. Since the first connection part 32 is connected to the supporting stand 2, and the second connection part 33 is connected to the projector body 1, when the manual force acts on the projector body 1, because of the relationship of T2>T1, the first connection part 32 will rotate before the second connection part 33, that is, only the first connection part 32 rotates relative to the rotating shaft 31, and at this time, the second connection part 33 and the holding component will be kept relative to the rotating shaft 31. The projector body 1 is kept stationary, and can rotate relative to the support stand 2 when manually acted on; during automatic rotation, the driving force of the rotation drive device acts on the projector body 1 to rotate it around the rotation axis 31, and after overcoming T2, the projector body 1 is driven to rotate relative to the support stand 2. At this time, only the second connecting part 33 rotates relative to the rotation axis 31, and the first connecting part 32 and the retaining assembly are kept stationary relative to the rotation axis 31. Finally, the projector body 1 can be relatively rotated relative to the support stand 2 when manually and electrically acted on, so that the functions of the two do not affect each other, thereby improving the user experience.

[0061] It is understandable that the holding component can make the first connection part 32 and the second connection part 33 have rotation damping T1 and T2 relative to the rotation shaft 31. Since the projector body 1 and the support stand 2 are relatively static and maintain the posture when no operation or electric drive is performed, there is also an implicit force relationship of T2>T1>T3, where T3 is the load torque caused by the center of gravity offset of the whole machine, acoustic vibration, and winding, so that the pitch posture can be maintained when no manual operation or electric drive is performed. Of course, rotation damping can also be understood as a torsion that can make the first connection part 32 rotate on the rotation axis.

[0062] Through the above technical solution, a first connecting part 32, a second connecting part 33 and a retaining assembly are arranged on the rotating shaft 31. The retaining assembly can make the rotation damping T2 of the second connecting part 33 relative to the rotating shaft 31 greater than the rotation damping T1 of the first connecting part 32 relative to the rotating shaft 31. In this way, when different forces act on the projector respectively, the projector can move relative to the supporting component. Furthermore, the projector can be rotated on the supporting component through different forces by rotating the connecting assembly, and the projector is provided with manual and electric driving modes on the supporting stand 2 to achieve the pitch adjustment of the fuselage, thereby improving the user experience.

[0063] In one embodiment, the retaining assembly includes a friction component, and the friction component is pressed against a surface of the first connecting portion 32 and / or a surface of the second connecting portion 33 .

[0064] Through this embodiment, the friction component is pressed against the surface of the first connection part 32 and / or the surface of the second connection part 33, so that the friction component can cause the first connection part 32 and the second connection part 33 to have resistance or rotation damping to hinder the rotation. In the specific implementation process, there can be multiple friction pads 36, which are pressed against one side or both sides of the first connection part 32 and the second connection part 33, or there can be one and the two side end surfaces of the friction pad 36 are in contact with the surfaces of the first connection part 32 and the second connection part 33, and there is no limitation.

[0065] Specifically, the friction component is a friction pad 36 sleeved on the rotating shaft 31, the friction pad 36 and the rotating shaft 31 will not rotate relative to each other, the first connecting portion 32 and the second connecting portion 33 are both disc-shaped structures, and the friction pad 36 is pressed against the axial disc surface of the first connecting portion 32 and / or the second connecting portion 33. The friction pad 36 sleeved on the rotating shaft 31 is used as the friction pad 36, which can be pressed more stably in the axial direction, and the friction pad 36 with the disc-shaped structure can have a larger friction surface or contact surface in contact with the first connecting portion 32 and / or the second connecting portion 33, thereby changing the contact area or setting the friction structure to achieve the required rotation damping.

[0066] In order to achieve adjustable clamping force and elastic pressing, further, one end of the rotating shaft 31 is provided with a limiting portion 311, and the other end is threadedly equipped with a holding piece 310, and the first connecting portion 32, the second connecting portion 33 and each of the friction pads 36 are simultaneously pressed by the holding piece 310 on the rotating shaft 31 between the limiting portion 311 and the holding piece 310; the rotating shaft 31 is also provided with a plurality of spring pieces 37 that are pressed by the holding piece 310 between the holding piece 310 and the friction pads 36.

[0067] In this way, the limiting portion 311 of the rotating shaft 31 and the pressing member 310 can form a pressing structure, so that the first connecting portion 32, the second connecting portion 33, the friction gasket 36 and the spring sheet can be pressed on the rotating shaft 31, and the friction gasket 36 can squeeze the first connecting portion 32 and the second connecting portion 33 under the pressure provided by the pressing member 310. The friction gasket 36 can thus be pressed against the axial end faces of the first connecting portion 32 and the second connecting portion 33, so that the first connecting portion 32 and the second connecting portion 33 have rotational damping when they rotate around the rotating shaft 31, and the pressing force can be adjusted by rotating the pressing member 310 to make the rotational damping variable. At the same time, the spring sheet 37 can provide elastic buffering in the axial direction, and the spring sheet 37 can make the pressing force adjustment more precise.

[0068] Furthermore, in order to achieve the stability of the rotating shaft 31, a positioning seat 3100 with a penetrating positioning hole can be provided on the shell 11 of the projector body 1, and a positioning shaft 312 provided at one end of the rotating shaft 31 with a holding piece 310 can be flexibly cooperated with the positioning hole to relatively fix the rotating shaft 31 to the projector body 1, so that the rotating shaft 31 can rotate more stably.

[0069] Specifically, the holding member 310 may be a nut, which is convenient for adjustment and disassembly.

[0070] In order to achieve the rotational damping relationship of T2>T1, in the embodiment of the present application, the contact area between the axial end surface of the first connecting portion 32 and the friction pad 36 is smaller than the contact area between the axial end surface of the second connecting portion 33 and the friction pad 36 .

[0071] The axial end faces of the first connecting part 32 and the second connecting part 33 contact with the friction gasket 36 via different contact areas, thereby enabling the rotational damping T1 of the first connecting part 32 relative to the rotating shaft 31 to be smaller than the rotational damping T2 of the second connecting part 33 relative to the rotating shaft 31. Based on such a damping relationship, it is convenient to realize the rotation of the projector body 1 relative to the supporting stand 2 under different forces.

[0072] Specific, combined Fig.11 As shown, the axial end surface of the first connection part 32 in contact with the friction pad 36 is distributed with a plurality of first oil storage grooves 322 in a circumferential array, and the axial end surface of the second connection part 33 in contact with the friction pad 36 is distributed with a plurality of second oil storage grooves 332 in a circumferential array, and the number and / or area of ​​the first oil storage grooves 322 is greater than the number and / or area of ​​the second oil storage grooves 332. In this way, the first oil storage grooves 322 of the first connection part 32 and the second oil storage grooves 332 on the second connection part 33 can reduce the contact area with the friction pad 36, and then the contact area can be different in the case of the first connection part 32 and the second connection part 33 of the same size by changing the distribution number and / or area of ​​the first oil storage grooves 322, so as to achieve that the rotation damping T2 of the second connection part 33 relative to the rotating shaft 31 is greater than the rotation damping of the first connection part 32 relative to the rotating shaft 31, and the first oil storage grooves 322 and the second oil storage grooves 332 can be used to store lubricating oil, so that the wear of the friction surface can be slowed down during the friction process.

[0073] In the field of metal shaft 31, when the positive pressure of the friction surface of shaft 31 is constant, the larger the area of ​​the friction surface of shaft 31 under normal working conditions, the more contact micro-convex bodies involved in the friction surface, the more cold welding points generated between the micro-convex bodies on the friction surface, and the greater the torque of shaft 31. In order to achieve the damping relationship of T2>T1, for example, fewer and smaller second oil storage tanks 332 are set on the friction pair surface of the second connection part 33, and larger and more first oil storage tanks 322 are set on the friction pair surface of the first connection part 32, and the difference between T2 and T1 is adjusted by adjusting the contact area of ​​the friction pair. The design contact area of ​​the friction pair of the first connection part 32 is smaller than that of the second connection part 33, and T2>T1 under the same clamping force.

[0074] On this basis, combined with Fig.12 As shown, in order to minimize the wear of the friction gasket 36 caused by long-term friction with the axial end surface of the first connecting part 32 or the second connecting part 33, a plurality of oil storage grooves are evenly distributed on the axial side of the friction gasket 36, so that the first connecting part 32 and the second connecting part 33 can basically receive the stored lubricating oil at the parts in contact with the friction gasket 36, thereby reducing wear and extending the service life.

[0075] In addition, please refer to Fig.10 As shown, the first connection part 32 is provided with a first limiting part 321, and the second connection part 33 is provided with a second limiting part 331, and the second limiting part 331 forms a limiting relationship with the first limiting part 321 in the circumferential direction to limit the relative rotation of the first connection part 32 and the second connection part 33 within a rotation angle range. The first limiting part 321 provided on the first connection part 32 can form a limiting relationship with the second limiting part 331 on the second connection part 33 in the circumferential direction, thereby enabling the target component 2 to rotate relative to the target component 1 within a preset reasonable angle range.

[0076] In order to facilitate the connection with the rotary drive device, please continue to refer to Figure 5 and Figure 6 As shown, in an embodiment of the present application, the connection assembly further includes a third connection portion 34 that is circumferentially stopped with the rotating shaft 31 , and the rotation drive device installed on the target component 2 is transmission-connected to the third connection portion 34 .

[0077] The third connection part 34 is used for transmission connection with the rotation drive device. Under the drive of the rotation drive device, the target component 2 can be rotated around the rotating shaft 31, and then the rotation under different forces can be realized, that is, the electric rotation relative to the manual rotation, and then the adjustment of the pitch action can be realized. When driven by the rotation drive device such as the motor 39, since T2>T1>T3, the torque of the motor 39 is amplified by the meshing transmission of the output gear 38 of the motor 39 and the gear 38 of the rotating shaft 31, and then overcomes T2 and drives the projector body 1 to rotate. At this time, only the second connection part 33 rotates relative to the entire rotating shaft 31, and at this time, the first connection part 32, the third connection part 34, the friction pad 36, the spring and the holding member 310 are all stationary relative to the rotating shaft 31. Finally, the manual and automatic functions do not affect each other, and in this process, the motor 39 rotates with the projector body 1 and the gear 38 connected to it revolves along the circumferential tooth surface of the toothed disk 35 fixed on the third connection part 34, thereby realizing the automatic pitch of the projector body 1.

[0078] Specific, combined Fig.13 As shown, the rotating shaft 31 is a round shaft structure with a flat position, the first connecting part 32 and the second connecting part 33 are both provided with a circular shaft hole and are rotatably matched with the rotating shaft 31 through the circular shaft hole, and the third connecting part 34 is provided with a flat shaft hole and is circumferentially stopped with the rotating shaft 31 through the flat shaft hole. The rotating shaft 31 with a round shaft structure with a flat position can be easily connected to the first connecting part 32 and the second connecting part 33, and the third connecting part 34 with the mutually matched flat shaft holes can be stopped and matched, that is, relatively fixed, so that better matching can be achieved in the presence of rotational damping.

[0079] It should be noted that if the existing rotating assembly including the rotating shaft 31 is directly connected to the driving device through the gear 38, when manually rotating, there will be a problem of poor feel due to the meshing clearance of the gear 38, and there will also be a sound of teeth collision caused by the elimination of the tooth gap between the output gear 38 of the motor 39 and the gear 38 of the rotating shaft 31. By maintaining the relationship that T2 is greater than T1 between the first connecting portion 32 and the second connecting portion 33 relative to the rotating shaft 31, the above situation can be avoided during rotation, thereby improving the user experience.

[0080] Please refer to Figure 2-5 In an embodiment of the present application, one side of the projector is connected to the support stand 2 via the manual-automatic rotating mechanism 3, and the other opposite side of the projector is rotationally connected to the support stand 2 via a connecting member 4.

[0081] One side connected by the manual-automatic rotating mechanism 3 can realize the manual and electric pitch functions without interfering with each other, and the other side can be easily rotated through the connecting member 4.

[0082] In a preferred embodiment of the connecting member 4, Figure 3 and Figure 4 As shown, the connecting member 4 includes a fixed shaft 41 and a shaft end retaining ring 42, the fixed shaft 41 has a holding portion 411, a rotating matching portion and a limiting end 412 distributed along the axial direction, wherein the holding portion 411 is formed by extending radially and is connected to the supporting stand 2, the rotating matching portion is rotationally matched with the shell 11 of the projector body 1, and the shell 11 is pressed between the shaft end retaining ring 42 and the limiting end 412; the inner side of the shaft end retaining ring 42 is provided with an inner edge 421 distributed along a partial circumference, and a locking position 422 is provided at one end of the inner edge 421, and the length of the holding portion 411 is smaller than the inner diameter of the shaft end retaining ring 42 and larger than the inner diameter of the inner edge 421, so that it can pass through the shaft end retaining ring 42 and switch between the unlocking position and the locking position 422 relative to the inner edge 421.

[0083] The fixed shaft 41 of the connecting member 4 can be rotatably matched with the projector housing 11, and its holding portion 411 can make the housing 11 be pressed between the shaft end retaining ring 42 and the limit end 412, and the shaft end retaining ring 42 can separate the housing 11 from the supporting component and avoid wear caused by hard contact, and by arranging an inner edge 421 on the inner side of the shaft end retaining ring 42, the inner edge 421 can cooperate with the holding portion 411 formed by radial extension to facilitate disassembly and assembly, and the shaft end retaining ring 42 can be used to tighten and clamp the side arm of the top shell of the entire machine, and play a certain role in correcting the rotating shaft 31.

[0084] Furthermore, the connecting component also includes a detection element 44 and a detection baffle 43 capable of triggering the detection element 44. The detection element 44 is arranged on the projector body 1, and the detection baffle 43 is connected to the fixed shaft 41. The detection baffle 43 does not rotate, and the detection element 44 rotates with the projector body 1.

[0085] In this way, the detection baffle 43 cooperates with the detection element 44 to realize pitch in-position sensing. The pitch in-position sensing is realized by the detection baffle 43 and the detection element 44 installed on the top cover of the whole machine. When the whole machine is pitched and rotated into position, the detection baffle 43 passes through the center of the slot of the detection element 44, thereby triggering the detection element 44 to generate a position signal. After receiving the signal, the controller of the projector body 1 can control the rotation drive device to stop driving, and finally realize automatic stop in position.

[0086] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention. The protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A rotating connection assembly, characterized in that: include: Rotating shaft; a connecting assembly, which is disposed on the rotating shaft and includes a first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively rotatably matched with the rotating shaft, and the first connecting portion is used to connect with the first target component, and the second connecting portion is used to connect with the second target component; and The retaining assembly is arranged between the rotating shaft and the connecting assembly, and under the action of the retaining assembly, the rotation damping of the first connecting part relative to the rotating shaft is T1, the rotation damping of the second connecting part relative to the rotating shaft is T2, and T2>T1.

2. A rotating connection assembly according to claim 1, characterized in that: The retaining assembly includes a friction component, which is pressed against a surface of the first connecting portion and / or a surface of the second connecting portion.

3. A rotating connection assembly according to claim 2, characterized in that: The friction component is a friction gasket sleeved on the rotating shaft. The friction gasket and the rotating shaft will not rotate relative to each other. The first connecting part and the second connecting part are both disc-shaped structures, and the friction gasket is pressed against the axial disc surface of the first connecting part and / or the second connecting part.

4. A rotating connection assembly according to claim 3, characterized in that: One end of the rotating shaft is provided with a limiting portion, and the other end is threadedly fitted with a holding piece, and the first connecting portion, the second connecting portion and each friction pad are simultaneously held on the rotating shaft between the limiting portion and the holding piece by the holding piece.

5. A rotating connection assembly according to claim 3, characterized in that: A contact area between the axial end surface of the first connection portion and the friction pad is smaller than a contact area between the axial end surface of the second connection portion and the friction pad.

6. A rotating connection assembly according to claim 3, characterized in that: The axial end surface where the first connecting portion contacts the friction pad is provided with a plurality of first oil storage grooves, the axial end surface where the second connecting portion contacts the friction pad is provided with a plurality of second oil storage grooves, and the number and / or area of ​​the first oil storage grooves is greater than the number and / or area of ​​the second oil storage grooves.

7. A rotating connection assembly according to claim 1, characterized in that: The first connection part is provided with a first limiting part, and the second connection part is provided with a second limiting part. The second limiting part and the first limiting part form a limiting relationship in the circumferential direction to limit the relative rotation of the first connection part and the second connection part within a rotation angle range.

8. A rotating connection assembly according to any one of claims 1 to 7, characterized in that: The connection assembly also includes a third connection portion that is stopped with the rotating shaft in the circumferential direction, and the rotation drive device installed on the target component 2 is transmission-connected with the third connection portion.

9. A rotating connection assembly according to claim 8, characterized in that: The rotating shaft is a circular shaft structure with a flat position, the first connecting part and the second connecting part are both provided with circular shaft holes and are rotatably matched with the rotating shaft through the circular shaft holes, and the third connecting part is provided with a flat shaft hole and is stopped in the circumferential direction with the rotating shaft through the flat shaft hole.

10. A manual-automatic rotating mechanism, characterized in that: include: The rotating connection assembly according to any one of claims 1 to 9; The second target component is a target device, and the first target component is a supporting component that supports the target device.

11. The manual-automatic rotating mechanism according to claim 10, characterized in that: It also includes a rotation driving device installed on the target device, the rotation driving device is connected to a gear, and the gear is meshed with a gear disk fixed to the rotating shaft.

12. A projector, characterized in that: include: Projector body; as well as The support stand is connected to the projection body through the manual-automatic rotating mechanism as described in claim 10 or 11.

13. A projector as claimed in claim 12, characterized in that: One side of the projector is connected to the support stand via the manual-automatic rotating mechanism, and the other opposite side of the projector is rotatably connected to the support stand via a connecting member; The connecting component includes a fixed shaft and a shaft end retaining ring, the fixed shaft has a holding portion, a rotating fitting portion and a limiting end distributed along the axial direction, wherein the holding portion is formed by extending radially and is connected to the supporting stand, the rotating fitting portion is rotationally fitted with the shell of the projector body, and the shell is pressed between the shaft end retaining ring and the limiting end; the inner side of the shaft end retaining ring is provided with an inner edge distributed along a partial circumference, and a locking position is provided at one end of the inner edge, and the length of the holding portion is smaller than the inner diameter of the shaft end retaining ring and larger than the inner diameter of the inner edge, so that it can pass through the shaft end retaining ring and switch between an unlocking position and a locking position relative to the inner edge.

14. A projector as claimed in claim 13, characterized in that: The connecting component further comprises a detection element and a detection baffle capable of triggering the detection element, the detection element is arranged on the projector body, and the detection baffle is connected to the fixed shaft.

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