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CN-224226413-U - Driving device for projection screen and projection equipment

CN224226413UCN 224226413 UCN224226413 UCN 224226413UCN-224226413-U

Abstract

The application relates to the technical field of projection equipment, in particular to a driving device for a projection screen and the projection equipment. The driving device for the projection screen comprises a shell, a winding shaft, a driving mechanism and a reset mechanism, wherein the winding shaft is rotationally connected to the shell and used for winding the projection screen, the driving mechanism is arranged in the shell and used for driving the projection screen to move on the winding shaft along a first direction, the reset mechanism comprises a linkage structure, a movable assembly and a reset piece, the linkage structure is respectively connected with the winding shaft and the movable assembly in a transmission mode, the movable assembly is connected with the reset piece, and the reset piece is used for driving the projection screen to move in the direction opposite to the first direction. Compared with the traditional winding mode driven by a motor and a reduction gearbox, the embodiment avoids an additional active driving device and realizes passive driving of reset action. The driving device of the implementation is simpler in structure, less in number of parts, simpler and more convenient in manufacturing and assembling process, and production cost and maintenance difficulty are reduced.

Inventors

  • CUI YONGJIN

Assignees

  • 深圳市顺力传动技术有限公司

Dates

Publication Date
20260512
Application Date
20250618

Claims (10)

  1. 1. A driving device for a projection screen, comprising: A housing; the rolling shaft is rotationally connected with the shell and used for rolling the projection screen; A driving mechanism arranged in the shell and used for driving the projection screen to move along a first direction on the winding shaft, and The reset mechanism comprises a linkage structure, a movable assembly and a reset piece, wherein the linkage structure is respectively connected with the winding shaft and the movable assembly in a transmission manner, the movable assembly is connected with the reset piece, and the reset piece is used for driving the projection screen to move in the reverse direction of the first direction.
  2. 2. The driving device for a projection screen according to claim 1, wherein the movable assembly comprises a mounting base and a moving structure, the mounting base is connected to the housing, the moving structure is respectively connected to the mounting base and the reset member in a driving manner, and the reset member is used for driving the moving structure to move so as to enable the winding shaft to move reversely along the first direction.
  3. 3. The driving device for a projection screen according to claim 2, wherein the moving structure comprises a screw and a slider, the screw is rotatably connected to the mounting base, the screw is in transmission connection with the linkage structure, the slider is in transmission connection with the screw, the reset member is respectively connected to the slider and the mounting base, and the reset member is used for driving the slider to move relative to the screw so as to drive the projection screen to move reversely along the first direction.
  4. 4. A driving device for a projection screen according to claim 3, wherein the mounting base further comprises a rotation stopping member, the slider is provided with a positioning portion, the positioning portion is slidably engaged with the rotation stopping member, and the rotation stopping member extends at least partially in an axial direction of the screw.
  5. 5. The driving device for a projection screen according to claim 4, wherein the mounting base further comprises a first base and a second base, the first base and the second base are respectively connected to the housing, the screw is respectively rotatably connected to the first base and the second base, the slider is located between the first base and the second base, the reset member is respectively connected to the second base and the slider, and the first base and the rotation stopping member are integrally formed or detachably connected.
  6. 6. The driving device for a projection screen according to any one of claims 3 to 5, wherein the linkage structure includes a first gear and a second gear, the first gear is connected to the take-up shaft, the second gear is connected to the lead screw, and the first gear is meshed with the second gear.
  7. 7. The driving device for a projection screen according to any one of claims 1 to 5, wherein the driving mechanism comprises a driving component and a retracting component, the driving component is connected to the housing, the retracting components are respectively connected to the output end boxes of the driving component in a transmission manner, and the driving component is used for driving the retracting component to drive the projection screen to move on the retracting shaft along the first direction.
  8. 8. The driving device for a projection screen according to claim 7, wherein the folding and unfolding assembly comprises a connecting seat and a connecting rod structure, the end portion of the projection screen is connected to the connecting seat, the connecting rod structure is respectively connected to the driving assembly and the connecting seat, and the driving assembly is used for driving the connecting rod structure to rotate so as to drive the projection screen to move relative to the folding and unfolding shaft.
  9. 9. The driving device for a projection screen according to claim 8, wherein the link structure comprises a first link and a second link, one end of the first link is rotatably connected to the driving assembly, the other end of the first link is rotatably connected to the second link, and one end of the second link remote from the first link is rotatably connected to the connecting base.
  10. 10. A projection device, comprising: a projection screen; a projection device for projecting toward the projection screen, and A driving device for a projection screen according to any one of claims 1 to 9, which is used for winding up the projection screen.

Description

Driving device for projection screen and projection equipment Technical Field The present application relates to the field of projection devices, and in particular, to a driving device for a projection screen and a projection device. Background At present, a common projection screen driving device in the market mostly adopts a mode of combining a motor and a reduction gearbox to realize the retraction of a screen. The structure generally comprises a motor driving shaft which drives a winding shaft to rotate through gear transmission, so that the projection screen is unfolded or wound on the winding shaft along a specific direction. The motor driving mode can realize accurate and automatic control and is widely applied to related products such as automobile roller shutter type projection ceiling screens and the like. However, the existing motor and reduction gearbox drive structure has certain limitations. First, the overall structure is relatively complex, including multiple drive components, and the manufacturing and assembly processes are cumbersome, resulting in higher costs. And secondly, the driving mechanism is large in size, the overall size and weight of the device are increased, and the miniaturization and light weight design of the product are not facilitated. In addition, the resetting process of the conventional driving device is realized by means of motor reversal or an additional driving device, so that the energy consumption and the fault risk of the system are increased. The complexity of the driving mechanism also makes maintenance and disassembly difficult, and the reliability and the use convenience of the product are reduced. Disclosure of utility model In view of the above, the present application provides a driving device for a projection screen and a projection apparatus, which are used for solving the problem of complex structure caused by adopting a motor and a reduction gearbox driving mode in the winding scheme of the projection screen in the prior art. A first aspect of the present application provides a driving device for a projection screen, comprising: A housing; the rolling shaft is rotationally connected with the shell and used for rolling the projection screen; A driving mechanism arranged in the shell and used for driving the projection screen to move along a first direction on the winding shaft, and The reset mechanism comprises a linkage structure, a movable assembly and a reset piece, wherein the linkage structure is respectively connected with the winding shaft and the movable assembly in a transmission manner, the movable assembly is connected with the reset piece, and the reset piece is used for driving the projection screen to move in the reverse direction of the first direction. In one possible implementation manner, the movable assembly includes a mounting seat and a moving structure, the mounting seat is connected to the housing, the moving structure is respectively connected to the mounting seat and the reset piece in a transmission manner, and the reset piece is used for driving the moving structure to move so that the winding shaft moves in the reverse direction of the first direction. In one possible implementation manner, the moving structure includes a screw and a slider, the screw is rotationally connected to the mounting seat, and the screw is in transmission connection with the linkage structure, the slider is in transmission connection with the screw, and the resetting piece is respectively connected to the slider and the mounting seat, and the resetting piece is used for driving the slider to move relative to the screw so as to drive the projection screen to move in the opposite direction of the first direction. In one possible implementation manner, the mounting seat further comprises a rotation stopping member, the sliding block is provided with a positioning part, the positioning part is in sliding fit with the rotation stopping member, and the rotation stopping member at least partially extends along the axial direction of the screw rod. In one possible implementation manner, the mounting seat further comprises a first seat body and a second seat body, the first seat body and the second seat body are respectively connected with the shell, the screw rod is respectively connected with the first seat body and the second seat body in a rotating mode, the sliding block is located between the first seat body and the second seat body, the reset piece is respectively connected with the second seat body and the sliding block, and the first seat body and the rotation stopping piece are integrally formed or detachably connected. In one possible implementation, the linkage structure includes a first gear and a second gear, the first gear is connected to the take-up shaft, the second gear is connected to the lead screw, and the first gear is meshed with the second gear. In one possible implementation manner, the driving mechanism includes a driving component an