A shielding device

Abstract

A shielding device provided by the present invention includes a control system, a curtain and an operating member, wherein the operating member is arranged at the bottom of the curtain, and the control system is capable of controlling the lifting and lowering of the curtain. The control system includes a supporting device and a positioning device, wherein the curtain can be connected to the supporting device in a winding manner, and the positioning device is installed in the supporting device, and the positioning device includes a positioning member and a driving member, wherein the positioning member can selectively lock or release the driving member, so that the driving member adjusts the curtain to a preset height. Thus, through the adjustment setting of the control system, the unfolding and storage of the curtain is facilitated, the unfolding height of the curtain is arbitrarily adjusted, and the rise and fall of the curtain is effectively mediated, so as to meet the installation requirements of different types of vehicles.

Description

Technical Field

[0001] The invention relates to the technical field of shading, in particular to a shading device suitable for vehicles. Background Art

[0002] The use of curtains has evolved from traditional indoors to fast-moving outdoors, such as high-speed trains, passenger ships, buses, and RVs. Due to the small space and continuous movement of transportation, the requirements for curtains are high. They must not only be easy to store and unfold, but also be able to adjust the unfolding height of the curtains according to different sunlight and usage needs, rather than being limited to fully unfolding the curtains to cover the windows and block the light.

[0003] The curtains on high-speed trains have tracks installed on both sides of the frame. The curtains can be opened and closed by manually pushing and pulling the handle. They can be stopped at any position, which improves the stability and reliability of the curtains. However, this type of curtain uses a ball clutch, which is relatively expensive and is not suitable for ordinary car windows.

[0004] On the other hand, most existing curtains rise to the top during the automatic rising process, and the pull-down parts fit the rolling tube. However, in actual models, such as RVs, window covers are installed on the top, and curtains are installed inside the window covers. The stored curtains cannot be seen by the outside world, which increases the aesthetics, but also makes it difficult to touch the pull-down handle. More importantly, the height of the window cover of each model is often different according to its design, and it is impossible to produce curtains with specific pull-down handles for each height, which increases unnecessary production and use costs. Summary of the invention

[0005] The main purpose of the present invention is to provide a shielding device that overcomes the shortcomings of the prior art. Through the adjustment settings of the control system, it is convenient to unfold and store the curtain, the unfolding height of the curtain can be adjusted arbitrarily, and the rise and fall of the curtain can be effectively regulated to meet the installation requirements of different types of vehicles.

[0006] Another object of the present invention is to provide a shielding device, which can adjust the reserved length of the operating part through a buffer device, so as to facilitate the downward pull of the curtain in the storage state, meet the height requirements of different window frames, and reduce the wear of the curtain when the operating part rises to the top.

[0007] Another object of the present invention is to provide a shielding device which has a compact structure, is easy to assemble, has convenient replacement of parts and components, is stable and reliable to use, and reduces production and use costs.

[0008] Another object of the present invention is to provide a shielding device, which, through the cooperation of a check piece and a positioning piece, achieves a high degree of self-locking when the curtain is unfolded, is easy to operate, meets the usage needs of most users, and is suitable for installation on vehicles such as RVs, ships, and high-speed trains.

[0009] In order to achieve the above purpose, the technical solution adopted by the present invention is: a shielding device includes a control system, a curtain and an operating member, the operating member is arranged at the bottom of the curtain, the control system is able to control the lifting and lowering of the curtain, the control system includes a supporting device and a positioning device, the curtain can be wound and connected to the supporting device, the positioning device is installed in the supporting device, the positioning device includes a positioning component and a driving component, the positioning component can selectively lock or release the driving component, so that the driving component adjusts the curtain to a preset height.

[0010] According to one embodiment of the present invention, the positioning member includes an outer shell, a locking pin, a check member, a positioning member and a connecting shaft, the check member is fixed to the outer side of the connecting shaft, the positioning member is slidably connected to the connecting shaft, the positioning member can axially slide close to or away from the check member, the positioning member is provided with a positioning track, and the locking pin extends from the outer shell to the positioning track to push the positioning member.

[0011] According to one embodiment of the present invention, the positioning member is provided with a guide block, an inner wall and a plurality of positioning areas, the closed loop formed between the guide block and the inner wall forms the positioning track, each of the positioning areas is distributed at the turning point of the inner wall, a first positioning area is provided on one transverse side of the inner wall, and a second positioning area and a third positioning area are provided on the other transverse side of the inner wall, so that the locking pin can move relatively around the guide block.

[0012] According to one embodiment of the present invention, the check member is provided with an inner disk surface and a plurality of check portions, wherein the check portions extend from the inner disk surface toward the positioning member at intervals, and the positioning member is further provided with a plurality of protrusions, wherein the protrusions protrude axially outward at intervals and face the check portions, so that the check portion can selectively lock the protrusions.

[0013] According to one embodiment of the present invention, the distance from the third positioning area to the check piece is greater than the distance from the second positioning area to the check piece, and when the locking pin moves relatively to the third positioning area, the positioning piece approaches the check piece, and the check piece locks the protrusion; when the locking pin moves relatively to the first positioning area or the third positioning area, the positioning piece deviates from the check piece, so that the protrusion disengages from the check piece.

[0014] According to one embodiment of the present invention, the number of the protrusions is twice that of the non-return portions, and the positioning portion is provided with a gap formed between the non-return portion and the adjacent protrusion, and the width of the gap is suitable for the protrusion to rotate and slide out of the non-return portion.

[0015] According to one embodiment of the present invention, the positioning member further includes an internal connecting member and a pair of gaskets, the positioning member is provided with a pair of grooves, the grooves are symmetrically formed in the inner cavity of the positioning member, the gaskets are symmetrically installed between the internal connecting member and the grooves of the positioning member, the connecting shaft is provided with a protruding sliding rail, and the internal connecting member can be axially slidably connected to the sliding rail.

[0016] According to one embodiment of the present invention, the driving component includes a main spring, a spring shaft, a driving member and an oil pressure damper, the main spring sleeve is disposed in the spring shaft, the connecting shaft and the driving member are respectively installed at two ends of the spring shaft, the oil pressure damper is coaxially aligned with the driving member, the driving member and the oil pressure damper rotate synchronously, and the oil pressure damper is used to slow down the rotation speed of the driving member.

[0017] According to one embodiment of the present invention, the supporting device includes an outer tube, a bracket and a pair of supports, the curtain can be connected to the outer tube in a windable manner, the positioning device is axially installed in the outer tube, the supports are symmetrically arranged at both ends of the outer tube, the bracket is used to install the shielding device on a carrier, the outer tube is longitudinally provided with a limiting portion, the limiting portion protrudes radially inward, the driving member and the oil damper are both provided with a first limiting groove, and the limiting portion is engaged with the first limiting groove.

[0018] According to one embodiment of the present invention, the control system further includes a buffer device, which includes a buffer shaft, a buffer nut and a coupling member, wherein the coupling member connects the buffer shaft and the support, the buffer shaft is provided with a threaded portion and a static contact portion, the static contact portion is adjacent to the coupling member, the buffer nut can be spirally movably sleeved on the threaded portion of the buffer shaft, and can be axially reciprocated along the threaded portion, approaching or deviating from the static contact portion, wherein a preset spacing is provided between the buffer nut and the static contact portion, when the curtain is unfolded, the maximum distance between the buffer nut and the static contact portion is the preset spacing, and the preset spacing is suitable for retaining the rising height of the operating member, wherein the buffer nut is provided with an outer disk, a second limiting groove and a hexagonal nut, the hexagonal nut is built into the buffer nut, connecting the buffer shaft and the buffer nut, the second limiting groove is opened on the outer disk, and is coupled to the limiting portion of the outer tube, wherein the buffer nut is provided with an inner recess and a plurality of protruding points, the inner recess is extended from the second limiting groove The positioning groove is radially recessed inward, and the protruding points are distributed at intervals on the outer periphery of the outer disk, wherein, the engaging member includes an engaging shell and an engaging shaft, the engaging shaft connects the static contact part and the support, and the engaging shell is clamped on the other end of the outer tube so as to rotate with the rotation of the outer tube, wherein the support includes an adjusting knob, an inner ring part and an adjusting part, the inner ring part is arranged between the adjusting knob and the adjusting part, the adjusting part is provided with a convex tooth part, and the convex tooth part is elastically and selectively connected to the inner ring part or the adjusting knob, wherein the adjusting part is further provided with an elastic element, a stop part, a first engaging hole and a second engaging hole, the first engaging hole faces the connecting shaft of the positioning device or the engaging shaft of the buffer device, the second engaging hole faces the adjusting knob, the stop part extends radially outward from the adjusting part in an annular manner, the elastic element is sleeved on the outer ring of the adjusting part, and the elastic element is arranged between the stop part and the inner ring part, wherein the fabric of the curtain is a PVC fabric with glass fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A is a schematic diagram of a shielding device according to the present invention.

[0020] Figure 1B is a side view of a screening arrangement according to the present invention.

[0021] Figure 2A is a schematic diagram of a control system according to the present invention.

[0022] Figure 2B is a cross-sectional view of a control system according to the present invention.

[0023] Figure 3A is a side view of a support according to the present invention.

[0024] Figure 3B is an exploded view of a support according to the present invention.

[0025] Figure 4 is a perspective view of a positioning device according to the present invention.

[0026] Figure 5 is an exploded view of a positioning device according to the present invention.

[0027] Figure 6 3D is a three-dimensional structural diagram of a positioning member according to the present invention.

[0028] Fig. 7A is a side view of a positioning member according to the present invention.

[0029] Figure 7B 1 is a top view of a positioning member according to the present invention.

[0030] Fig. 8A 4 is a three-dimensional structural diagram of a non-return member according to the present invention.

[0031] Figure 8B 1 is a front view of a backstop according to the present invention.

[0032] Fig. 9 3D is a three-dimensional structural diagram of a connecting shaft according to the present invention.

[0033] Fig. 10A 2 is a three-dimensional structural diagram of a buffer device according to the present invention.

[0034] Fig. 10B is an exploded view of a buffer device according to the present invention.

[0035] Fig.11A It is a three-dimensional structural diagram of the buffer nut according to the present invention.

[0036] Fig. 11B is a front view of an outer tube according to the present invention.

[0037] Fig. 12A Schematic diagram of the position of the locking pin and the positioning member according to the present invention (pull-down state).

[0038] Fig. 12B Schematic diagram of the position of the locking pin and the positioning member according to the present invention (locked state).

[0039] Fig. 12C Schematic diagram of the position of the locking pin and the positioning member according to the present invention (unlocked state).

[0040] Fig.12D Schematic diagram of the position of the locking pin and the positioning member according to the present invention (in the raised state). DETAILED DESCRIPTION

[0041] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0042] like Figures 1A to 11B The present invention shows a shielding device, which is suitable for installation on vehicles such as RVs, ships or high-speed trains, and is used to block sunlight and adjust light. The shielding device includes a control system 1, a curtain 2 and an operating member 3. The operating member 3 is arranged at the bottom of the curtain 2, and the control system 1 is able to control the lifting and lowering of the curtain 2. The control system 1 includes a supporting device 10 and a positioning device 20. The curtain 2 can be wound and connected to the supporting device 10. The positioning device 20 is installed in the supporting device 10. The positioning device 20 includes a positioning member 30 and a driving member 22. The positioning member 30 can selectively lock or release the driving member 22, so that the driving member 22 adjusts the curtain 2 to a preset height. Therefore, through the adjustment setting of the control system 1, the unfolding and storage of the curtain 2 are facilitated, the unfolding height of the curtain 2 is arbitrarily adjusted, and the rise and fall of the curtain 2 are effectively mediated, meeting the installation requirements of different types of vehicles.

[0043] Among them, the positioning member 30 includes an outer shell 31, a locking pin 32, a check member 33, a positioning member 34 and a connecting shaft 37. The check member 33 is fixed to the outer side of the connecting shaft 37, and the positioning member 34 is slidably connected to the connecting shaft 37. The positioning member 34 can axially slide close to or deviate from the check member 33. The positioning member 34 is provided with a positioning track 341. The locking pin 32 extends from the outer shell 31 to the positioning track 341, so as to push the positioning member 34 to rotate or rotate and slide axially at the same time. When the positioning member 34 and the check member 33 are interlocked, the outer shell 31 is locked by the locking pin 32, and then the driving member 22 is locked.

[0044] Among them, the positioning member 34 is provided with a guide block 342, an inner wall 347 and a plurality of positioning areas. The closed loop formed between the guide block 342 and the inner wall 347 forms the positioning track 341. The positioning areas are distributed at the turning point of the inner wall 347. A first positioning area 343 is provided on one lateral side of the inner wall 347, and a second positioning area 344 and a third positioning area 345 are provided on the other lateral side of the inner wall 347, so that the locking pin 32 can move relative to the guide block 342. The relative movement of the locking pin 32 refers to the locking pin 32 being stationary in the radial direction relative to the positioning member 34, and the positioning member 34 moves relative axially with the rotation of the locking pin 32. In order to be more intuitively understood, the relative movement of the locking pin 32 on the positioning track 341 is used here to describe the movement of the positioning member 34.

[0045] When the locking pin 32 pushes the positioning member 34 to rotate in the counterclockwise direction, the locking pin 32 moves relatively from the second positioning area 344 to the first positioning area 343; when the positioning member 34 continues to rotate counterclockwise relative to the locking pin 32, the locking pin 32 moves relatively from the first positioning area 343 to the third positioning area 345; when the locking pin 32 pushes the positioning member 34 to rotate in the clockwise direction, the locking pin 32 moves relatively from the third positioning area 345 to the first positioning area 343; wherein the clockwise direction and the counterclockwise direction correspond to the unfolding direction of the curtain 2; when the curtain 2 unfolds in the counterclockwise direction, the locking pin 32 pushes the positioning member 34 to rotate in the counterclockwise direction; when the curtain 2 unfolds in the clockwise direction, on the contrary, the locking pin 32 pushes the positioning member 34 to rotate clockwise; herein, it is unified as the unfolding of the curtain 2 in the counterclockwise direction; if it is the opposite direction, it is understood as the reverse direction.

[0046] Among them, the check member 33 is provided with an inner disk surface 334 and a plurality of check portions 331, and the check portions 331 extend from the inner disk surface 334 to the positioning member 34 at intervals, and the positioning member 34 is further provided with a plurality of protrusions 348, and the protrusions 348 protrude axially outward at intervals, facing the check portions 331, and the number of the protrusions 348 is twice that of the check portions 331, so that the check portion 331 can selectively lock the protrusions 348, and when the check portion 331 is engaged between the protrusions 348, the self-locking of the positioning member 34 is achieved, thereby locking the outer shell 31, so that the support device 10 cannot rotate.

[0047] Among them, the distance between the third positioning area 345 and the check piece 33 is greater than the distance between the second positioning area 344 and the check piece 33. When the locking pin 32 moves relatively to the third positioning area 345, the positioning member 34 is close to the check piece 33, and the check portion 331 locks the protrusion 348. When the locking pin 32 moves relatively to the first positioning area 343 or the third positioning area 345, the positioning member 34 deviates from the check piece 33, so that the protrusion 348 disengages from the check portion 331, thereby releasing the positioning member 34 and then releasing the outer shell 31, so that the outer shell 31 rotates with the supporting device 10.

[0048] In which, the positioning portion is provided with a gap 300, and the gap 300 is formed between the non-return portion 331 and the adjacent protrusion 348, and the width of the gap 300 is suitable for the protrusion 348 to rotate and slide out of the non-return portion 331 when the locking pin 32 moves relatively from the third positioning area 345 to the first positioning area 343.

[0049] The positioning member 30 further includes an internal member 35 and a pair of gaskets 36. The positioning member 34 is provided with a pair of grooves 349, and the grooves 349 are symmetrically formed in the inner cavity of the positioning member 34. The gaskets 36 are symmetrically installed between the internal member 35 and the grooves 349 of the positioning member 34. The connecting shaft 37 is provided with a protruding slide rail 371, and the internal member 35 can be axially slidably connected to the slide rail 371, so that the positioning member 34 can rotate relative to the internal member 35, or the positioning member 34 can rotate relative to the internal member 35 while driving the internal member 35 to move axially.

[0050] Among them, the connecting shaft 37 is a flat structure, and the internal component 35 is built into the positioning component 34, connecting the positioning component 34 and the connecting shaft 37, which helps the positioning component 34 to move back and forth along the slide rail 371, preventing the positioning component 34 from slipping during the spiral movement, and also helps to adjust the direction of the connecting shaft 37 and the check member 33.

[0051] The check member 33 is further provided with a connecting hole 332 and a clamping portion 333 . The connecting hole 332 is provided in the middle of the inner disk surface 334 . The outer end of the connecting shaft 37 passes through the connecting hole 332 . The clamping portion 333 clamps the outer side of the connecting shaft 37 .

[0052] The driving component 22 includes a main spring 221, a spring shaft 222, a driving member 224 and an oil pressure damper 223. The main spring 221 is sleeved in the spring shaft 222. The connecting shaft 37 and the driving member 224 are respectively installed at both ends of the spring shaft 222. The oil pressure damper 223 is coaxially aligned with the driving member 224. The driving member 224 and the oil pressure damper 223 rotate synchronously. The oil pressure damper 223 is used to slow down the rotation speed of the driving member 224, so that the curtain 2 rises slowly when it rises.

[0053] The supporting device 10 includes an outer tube 11, a bracket 12 and a pair of supports 13. The curtain 2 can be connected to the outer tube 11 in a rollable manner. The positioning device 20 is axially installed in the outer tube 11. The supports 13 are symmetrically arranged at both ends of the outer tube 11. The bracket 12 is used to install the shielding device on a carrier. The outer tube 11 is longitudinally provided with a limiting portion 111, and the limiting portion 111 protrudes radially inward. The driving member 224 and the oil pressure damper 223 are both provided with a first limiting groove 225, and the limiting portion 111 is engaged with the first limiting groove 225. The outer shell 31 is clamped at one end of the outer end. When the outer tube 11 rotates, the driving member 224, the oil pressure damper 223 and the outer shell 31 are driven to rotate.

[0054] The control system 1 further includes a buffer device 40, which includes a buffer shaft 41, a buffer nut 42 and a coupling 43. The coupling 43 connects the buffer shaft 41 and the support 13. The buffer shaft 41 is provided with a threaded portion 411 and a stationary contact portion 412. The stationary contact portion 412 is adjacent to the coupling 43. The buffer nut 42 can be spirally movably sleeved on the threaded portion 411 of the buffer shaft 41, so as to be able to reciprocate axially along the threaded portion 411, approaching or deviating from the stationary contact portion 412. When the curtain 2 descends, the buffer nut 42 deviates from the stationary contact portion 412. When the curtain 2 rises, the buffer nut 42 approaches the stationary contact portion 412 until the buffer nut 42 abuts against the stationary contact portion 412, and the curtain 2 cannot rise. The reserved length of the operating member 3 can be adjusted through the buffer device 40, so that the curtain 2 can be pulled down in the storage state to meet the height requirements of different window frames, while reducing the wear of the curtain 2 when the operating member 3 is raised to the top.

[0055] There is a preset spacing between the buffer nut 42 and the static contact part 412. When the curtain 2 is unfolded, the maximum distance between the buffer nut 42 and the static contact part 412 is the preset spacing. The preset spacing is suitable for retaining the rising height of the operating member 3, thereby meeting the needs of different window covers. Therefore, by adjusting the preset spacing of the buffer nut 42, the rising height of the operating member 3 can be adjusted. For example, the height of the operating member 3 to be reserved is 3 inches, and the preset spacing of the buffer nut 42 is reduced. When the curtain 2 is fully unfolded, the maximum distance between the buffer nut 42 and the static contact part 412 becomes smaller, and the adjustment is quick and convenient, and the assembly is convenient.

[0056] The buffer nut 42 is provided with an outer disk 422, a second limiting groove 425 and a hexagonal nut. The hexagonal nut is built into the buffer nut 42 to connect the buffer shaft 41 and the buffer nut 42. The second limiting groove 425 is opened on the outer disk 422 and engaged with the limiting portion 111 of the outer tube 11, so that the outer tube 11 drives the buffer nut 42 to rotate, and the buffer nut 42 spirally moves back and forth along the buffer shaft 41.

[0057] The buffer nut 42 is provided with an inner recess 423 and a plurality of protruding points 424. The inner recess 423 is recessed radially inward from the second limiting groove 425, and the protruding points 424 are distributed at intervals on the outer circumference of the outer disk 422. The inner recess 423 helps to increase the elastic deformation force of the outer disk 422 of the buffer nut 42, so that the second limiting groove 425 can be relatively slidably connected to the outer tube 11 to prevent the connection between the buffer nut 42 and the outer tube 11 from being too loose or too tight. When it is too loose, it is difficult for the outer tube 11 to effectively drive the buffer nut 42 to rotate synchronously. When it is too tight, it is difficult for the buffer nut 42 to slide along the limiting portion 111 of the outer tube 11, and the friction resistance is large. The protruding points 424 help to increase the wear resistance between the buffer nut 42 and the outer tube 11, and facilitate the relative reciprocating sliding of the buffer nut 42.

[0058] The coupling member 43 includes a coupling shell 431 and a coupling shaft 432 . The coupling shaft 432 connects the stationary contact portion 412 and the support 13 . The coupling shell 431 is clamped at the other end of the outer tube 11 so as to rotate along with the rotation of the outer tube 11 .

[0059] The positioning device 20 is installed on one side of the outer tube 11 , and the buffer device 40 is installed on the other side of the outer tube 11 .

[0060] Each of the supports 13 is adjustably connected to the connecting shaft 37 of the positioning device 20 and the engaging shaft 432 of the buffer device 40. The support 13 includes an adjusting knob 131, an inner ring portion 132 and an adjusting portion 133. The inner ring portion 132 is arranged between the adjusting knob 131 and the adjusting portion 133. The adjusting portion 133 is provided with a convex tooth portion 134. The convex tooth portion 134 is elastically and selectively connected to the inner ring portion 132 or the adjusting knob 131. When the convex tooth portion 134 is connected to the adjusting knob 131, the adjusting knob 131 is able to adjust the adjusting portion 133 to rotate. When the convex tooth portion 134 is connected to the inner ring portion 132, the convex tooth portion 134 is separated from the adjusting knob 131, and the convex tooth portion 134 and the adjusting knob 131 cannot be interlocked and rotated. Therefore, the buffer device 40 can be adjusted after assembly through the adjustment knob 131 of the support 13, and a preset distance between the buffer nut 42 and the static contact portion 412 can be set. The operation is simple, and there is no need to disassemble the control system 1 for adjustment, nor is there a need to produce shielding devices with different reserved heights at the factory. It can be adjusted automatically according to different window frames.

[0061] Among them, the adjusting part 133 is further provided with an elastic element 135, a shifting part 138, a first engaging hole 136 and a second engaging hole 137, the first engaging hole 136 faces the connecting shaft 37 of the positioning device 20 or the engaging shaft 432 of the buffer device 40, the second engaging hole 137 faces the adjusting knob 131, the shifting part 138 extends radially outward from the adjusting part 133 in a ring shape, the elastic element 135 is sleeved on the outer ring of the adjusting part 133, the elastic element 135 is arranged between the shifting part 138 and the inner ring part 132, when the inner ring part 132 approaches the shifting part 138, the elastic element 135 generates an elastic force to push the inner ring part 132 and the adjusting knob 131 to reset.

[0062] The fabric of the curtain 2 is PVC fabric with glass fiber, which is light-shielding, flame-retardant and UV-proof.

[0063] During installation, firstly adjust the connected positioning device 20 or the buffer device 40 through the adjusting knob 131 of the support 13. When adjusting the positioning device 20, confirm whether the curtain 2 can be pulled down. If it cannot be pulled down, press the adjusting knob 131 inwardly so that the inner ring portion 132 approaches the shifting portion 138, so that the convex tooth portion 134 connects to the adjusting knob 131, rotate the adjusting knob 131, drive the adjusting portion 133 to rotate, and then drive the connecting shaft 37 to rotate, and the positioning member 34 moves relative to the locking pin 32 through the internal connection member 35, so that the locking pin 32 moves relatively from the third positioning area 345 to the first positioning area 343, so that the curtain 2 can be pulled down, and then release the adjusting knob 131, the elastic element 135 pushes the inner ring portion 132 to return to its original position, and the adjusting knob 131 deviates from the convex tooth portion 134.

[0064] Determine the height of the window cover, keep the reserved height of the operating member 3 in the storage state, adjust the buffer device 40, such as changing the reserved height from 2 inches to 4 inches, first fully unfold the curtain 2, pull the operating member 3 to the bottom, the buffer nut 42 reaches the farthest distance from the static contact part 412, and then press the adjusting knob 131 inward so that the convex tooth part 134 connects to the adjusting knob 131, rotate the adjusting knob 131, drive the adjusting part 133 to rotate, and then drive the buffer shaft 41 to rotate clockwise or counterclockwise through the coupling shaft 432, so that The buffer nut 42 moves toward the static contact portion 412, shortening the maximum preset distance between the buffer nut 42 and the static contact portion 412 (wherein the rotation amplitude and the corresponding reserved height of the adjusting knob 131 can be determined according to numerical conversion, such as referring to the product description). After adjustment, the adjusting knob 131 is released, and the elastic element 135 pushes the inner ring portion 132 to reset. The adjusting knob 131 deviates from the convex tooth portion 134. If it changes from 4 inches to 2 inches, reverse adjustment is performed to expand the preset distance between the buffer nut 42 and the static contact portion 412.

[0065] When in use, the positioning device 20 and the buffer device 40 operate accordingly with the rotation of the outer tube 11. First, for the positioning device 20, the curtain 2 is pulled down by the operating member 3, and the curtain 2 moves downward and unfolds. The outer tube 11 drives the outer shell 31, the driving member 224 and the oil pressure damper 223 to rotate counterclockwise. The main spring 221 is tightened to generate elastic force. The locking pin 32 of the outer shell 31 drives the positioning member 34 to rotate. The locking pin 32 moves relatively from the second positioning area 344 to the first positioning area 343. In the first positioning area 343, the locking pin 32 drives the positioning member 34 to keep rotating counterclockwise. Fig.11A As shown;

[0066] When the lock pin 32 is unfolded to the desired height, such as halfway, the pull-down action is stopped, and the outer shell 31, the driving member 224 and the oil pressure damper 223 stop rotating counterclockwise. Due to the elastic force of the main spring 221, the outer shell 31 drives the locking pin 32 to rotate slightly clockwise. At the same time, the positioning member 34 continues to rotate counterclockwise due to inertia, so that the locking pin 32 moves relatively from the first positioning area 343 to the third positioning area 345. Fig. 12BAs shown, the positioning member 34 slides axially and approaches the check member 33 until the protrusion 348 self-locks with the check member 331, thereby locking the positioning member 34 and the locking pin 32. After releasing the hand, the locking force between the positioning member 34 and the check member 33 offsets the elastic force of the main spring 221, so that the curtain 2 is kept at the stop position, and a quick stop at any height is achieved;

[0067] When the lock pin 32 is pulled down again, it rotates counterclockwise, driving the positioning member 34 to rotate, and the lock pin 32 relatively moves from the third positioning area 345 to the first positioning area 343. Fig. 12C As shown, the positioning member 34 moves axially away from the non-return member 33 until the protrusion 348 is disengaged from the non-return member 331, the locking pin 32 and the positioning member 34 are in an unlocked state, and the outer tube 11 rotates again;

[0068] After letting go, the curtain 2 automatically rises. Through the release of elastic force, the main spring 221 pushes the outer tube 11 to rotate clockwise, and the oil pressure damper 223 reduces the rising speed of the curtain 2, so that the curtain 2 rises slowly. The locking pin 32 relatively moves from the first positioning area 343 to the second positioning area 344. In the second positioning area 344, the locking pin 32 drives the positioning member 34 to keep rotating clockwise. Fig.12D shown.

[0069] For the buffer device 40, when the curtain 2 is pulled down, the buffer nut 42 moves away from the static contact portion 412 as the outer tube 11 rotates until the outer tube 11 stops moving; when the curtain 2 rises, the buffer nut 42 approaches the static contact portion 412 as the outer tube 11 rotates in the opposite direction until the buffer nut 42 abuts against the static contact portion 412, causing the outer tube 11 to stop rotating, and according to the preset spacing of the buffer nut 42, the operating member 3 rises to a reserved height and stops running.

[0070] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A shielding device, characterized in that: The invention comprises a control system, a curtain and an operating member, wherein the operating member is arranged at the bottom of the curtain, and the control system is capable of controlling the lifting and lowering of the curtain. The control system comprises a supporting device, a positioning device and a buffering device, and the curtain can be connected to the supporting device in a winding manner, and the positioning device is installed in the supporting device. The positioning device comprises a positioning member and a driving member, and the positioning member can selectively lock or release the driving member so that the driving member adjusts the curtain to a preset height, wherein the supporting device comprises an outer tube, a bracket and a pair of supports, and the curtain can be connected to the outer tube in a winding manner, and the positioning device is axially installed in the outer tube, and the supports are symmetrically arranged at both ends of the outer tube, and the bracket is used to install the shielding device on a carrier, and the outer tube is longitudinally provided with a limiting portion, and the limiting portion protrudes radially inwardly, and the driving member comprises a main spring, a spring shaft, a driving member and an oil pressure damper, and the main spring sleeve is placed in the spring shaft. The oil pressure damper is coaxially aligned with the driving member, and the driving member and the oil pressure damper rotate synchronously. The oil pressure damper is used to slow down the rotation speed of the driving member. The driving member and the oil pressure damper are both provided with a first limit groove, and the limit part is engaged with the first limit groove. The buffer device includes a buffer shaft, a buffer nut and a coupling member, and the coupling member connects the buffer shaft and the support. The buffer shaft is provided with a threaded portion and a static contact portion, and the static contact portion is adjacent to the coupling member. The buffer nut can be spirally movably sleeved on the threaded portion of the buffer shaft, so as to be able to reciprocate axially along the threaded portion, approaching or deviating from the static contact portion, wherein a preset distance is provided between the buffer nut and the static contact portion. When the curtain is unfolded, the maximum distance between the buffer nut and the static contact portion is the preset distance. The preset distance is suitable for retaining the automatic rising height of the operating member. When the operating member automatically rises, the buffer nut axially approaches the static contact portion outward.

2. The shielding device according to claim 1, characterized in that: The positioning component includes an outer shell, a locking pin, a check piece, a positioning piece and a connecting shaft. The check piece is fixed to the outer side of the connecting shaft, the positioning piece is slidably connected to the connecting shaft, the positioning piece can axially slide close to or deviate from the check piece, the positioning piece is provided with a positioning track, and the locking pin extends from the outer shell to the positioning track to push the positioning piece.

3. The shielding device according to claim 2, characterized in that: The positioning member is provided with a guide block, an inner wall and a plurality of positioning areas. The closed loop formed between the guide block and the inner wall forms the positioning track. The positioning areas are distributed at the turning points of the inner wall. A first positioning area is provided on one transverse side of the inner wall, and a second positioning area and a third positioning area are provided on the other transverse side of the inner wall, so that the locking pin can move relatively around the guide block.

4. The shielding device according to claim 3, characterized in that: The check member is provided with an inner disk surface and a plurality of check portions, wherein the check portions extend from the inner disk surface toward the positioning member at intervals, and the positioning member is further provided with a plurality of protrusions, wherein the protrusions protrude axially outward at intervals and face the check portions, so that the check portion can selectively lock the protrusions.

5. The shielding device according to claim 4, characterized in that: The distance between the third positioning area and the check piece is greater than the distance between the second positioning area and the check piece. When the locking pin moves relatively to the third positioning area, the positioning piece approaches the check piece, and the check piece locks the protrusion. When the locking pin moves relatively to the first positioning area or the third positioning area, the positioning piece deviates from the check piece, so that the protrusion disengages from the check piece.

6. The shielding device according to claim 5, characterized in that: The number of the protrusions is twice that of the non-return portions, and the positioning member is provided with a gap formed between the non-return portion and an adjacent protrusion, and the width of the gap is suitable for the protrusion to rotate and slide out of the non-return portion.

7. The shielding device according to claim 6, characterized in that: The positioning member further includes an internal connecting member and a pair of gaskets. The positioning member is provided with a pair of grooves, and the grooves are symmetrically formed in the inner cavity of the positioning member. The gaskets are symmetrically installed between the internal connecting member and the grooves of the positioning member. The connecting shaft is provided with a protruding sliding rail, and the internal connecting member can be axially slidably connected to the sliding rail.

8. The shielding device according to any one of claims 2 to 7, characterized in that: The connecting shaft and the driving member are respectively installed at two ends of the spring shaft.

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