CN109552012B

CN109552012B - A shielding device

Info

Publication number: CN109552012B
Application number: CN201811453046.3A
Authority: CN
Inventors: 伊清
Original assignee: Ningbo Baiyi Automotive Parts Co ltd
Current assignee: Ningbo Baiyi Automotive Parts Co ltd
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2025-03-04
Anticipated expiration: 2038-11-30
Also published as: CN109552012A

Abstract

The present invention provides a shielding device including 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

Shielding device

Technical Field

The invention relates to the technical field of shading, in particular to a shading device suitable for a vehicle.

Background

The use of curtains has evolved from traditional indoor to fast moving outdoor, such as in high-speed rail, passenger ships, buses, motor homes. Because the vehicle is small in space and continuously moves, the requirements on the curtain are high, the curtain is convenient to store and unfold, the unfolding height of the curtain is required to be adjusted randomly according to different sun rays and use requirements, and the curtain is not limited to be unfolded completely to shield the window, so that light is blocked.

The window curtain on the high-speed rail is provided with the tracks on two sides of the frame, the opening and closing of the curtain can be realized by manually pushing and pulling the pull-down handle, the curtain can be stopped at any position at will, and the use stability and reliability of the curtain are improved.

On the other hand, most of the existing curtains are lifted to the top in the automatic lifting process, and the pull-down parts are attached to the scrolling pipe. However, in an actual vehicle type, such as a car as a house, a window wrap is installed at the top of the car as a window curtain is installed inside the window wrap, and the received window curtain is not seen from the outside, so that the aesthetic property is improved, but the pull-down handle is difficult to touch. More importantly, the heights of the window coverings are often different according to the design of each vehicle type, and the curtain with a specific pull-down handle cannot be produced according to each height, so that unnecessary production cost and use cost are increased.

Disclosure of Invention

The invention mainly aims to provide a shielding device which overcomes the defects of the prior art, is convenient for unfolding and containing the curtain cloth by adjusting and setting a control system, can randomly adjust the unfolding height of the curtain cloth, effectively regulates the ascending and descending of the curtain cloth and meets the installation requirements of different types of traffic tools.

Another object of the present invention is to provide a shielding device, which is capable of adjusting a reserved length of an operating member through a buffer device, so as to facilitate a pulling-down operation of a curtain fabric in a storage state, meet the height requirements of different window coverings, and reduce the abrasion of the curtain fabric when the operating member is lifted to the top.

Another object of the present invention is to provide a shielding device, which has a compact structure, is convenient to assemble, is convenient to replace parts, is stable and reliable to use, and reduces production cost and use cost.

The invention further aims to provide a shielding device which is matched with a check piece and a positioning piece, so that the high self-locking of the curtain cloth when the curtain cloth is unfolded is realized, the operation is convenient, the use requirements of most users are met, and the shielding device is suitable for being installed on vehicles such as a motor home, a ship and a high-speed rail.

In order to achieve the purpose, the shielding device comprises a control system, a curtain cloth and an operating piece, wherein the operating piece is arranged at the bottom of the curtain cloth, the control system can control lifting of the curtain cloth, the control system comprises a supporting device and a positioning device, the curtain cloth is connected to the supporting device in a winding mode, the positioning device is arranged in the supporting device and comprises a positioning component and a driving component, and the positioning component can selectively lock or release the driving component to enable the driving component to adjust the curtain cloth to a preset height.

According to an embodiment of the present invention, the positioning member includes an outer housing, a lock pin, a check member, a positioning member, and a connecting shaft, wherein the check member is fixedly connected to an outer side of the connecting shaft, the positioning member is slidably connected to the connecting shaft, the positioning member is axially slidably near or offset from the check member, the positioning member is provided with a positioning track, and the lock pin extends from the outer housing to the positioning track to push the positioning member.

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

According to an embodiment of the present invention, the check member is provided with an inner disk surface and a plurality of check portions extending from the inner disk surface toward the positioning member at intervals, the positioning member is further provided with a plurality of protruding portions protruding axially outwardly at intervals, facing the check portions, so that the check portions selectively lock the protruding portions.

According to an embodiment of the present invention, a distance from the third positioning area to the check member is larger than a distance from the second positioning area to the check member, the positioning member is close to the check member when the lock pin is relatively moved to the third positioning area, the check portion locks the protruding portion, and the positioning member is deviated from the check member when the lock pin is relatively moved to the first positioning area or the third positioning area, so that the protruding portion is separated from the check portion.

According to an embodiment of the invention, the number of the protruding portions is twice that of the non-return portions, and the positioning portion is provided with a gap formed between the non-return portions and the adjacent protruding portions, the width of the gap being adapted for the protruding portions to rotationally slide out of the non-return portions.

According to an embodiment of the present invention, the positioning member further includes an inner connector provided with a pair of grooves symmetrically formed in the inner cavity of the positioning member, and a pair of shims symmetrically mounted between the inner connector and the grooves of the positioning member, the connecting shaft is provided with a protruding slide rail, and the inner connector is axially slidably connected to the slide rail.

According to an embodiment of the present invention, the driving member includes a main spring, a spring shaft, a driving element, and an oil pressure damper, the main spring is sleeved in the spring shaft, the connecting shaft and the driving element are respectively mounted at two ends of the spring shaft, the oil pressure damper is coaxially aligned with the driving element, the driving element and the oil pressure damper synchronously rotate, and the oil pressure damper is used for slowing down the rotation speed of the driving element.

According to an embodiment of the present invention, the supporting device includes an outer tube, a bracket, and a pair of brackets, the curtain is windably connected to the outer tube, the positioning device is axially installed in the outer tube, the brackets are symmetrically disposed at two ends of the outer tube, the bracket is used for installing the shielding device on a carrier, the outer tube is longitudinally provided with a limiting portion, the limiting portion protrudes radially inwards, the driving member and the hydraulic damper are both provided with a first limiting groove, and the limiting portion is engaged with the first limiting groove.

According to an embodiment of the present invention, the control system further includes a buffer device including a buffer shaft, a buffer nut, and a joint member connecting the buffer shaft and the support, the buffer shaft being provided with a threaded portion and a stationary contact portion adjacent to the joint member, the buffer nut being threadably engaged with the threaded portion of the buffer shaft so as to reciprocate axially along the threaded portion to approach or deviate from the stationary contact portion, wherein a preset interval is provided between the buffer nut and the stationary contact portion, a maximum distance between the buffer nut and the stationary contact portion is the preset interval when the curtain cloth is spread, the preset interval is adapted to retain a rising height of the operation member, wherein the buffer nut is provided with an outer disk, a second limiting groove, and a hexagonal nut, the hexagonal nut is arranged in the buffer nut, connects the buffer shaft and the buffer nut, the second limit groove is arranged on the outer disc and is connected with the limit part of the outer tube, the buffer nut is provided with an inner concave part and a plurality of protruding points, the inner concave part is recessed inwards from the second limit groove in the radial direction, the protruding points are distributed on the periphery of the outer disc at intervals, the connecting piece comprises a connecting shell and a connecting shaft, the connecting shaft is connected with the static contact part and the support, the connecting shell is clamped at the other end of the outer tube and can rotate along with the rotation of the outer tube, the support comprises 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, the convex tooth part is elastically and selectively connected with the inner ring part or the adjusting knob, the adjusting part is further provided with an elastic element, a gear part, a first joint hole and a second joint hole, the first joint hole faces to a connecting shaft of the positioning device or a joint shaft of the buffer device, the second joint hole faces to the adjusting knob, the gear part annularly extends outwards from the adjusting part in the radial direction, the elastic element is sleeved on an outer ring of the adjusting part, the elastic element is arranged between the gear part and the inner ring part, and the fabric of the curtain cloth is PVC fabric with glass fibers.

Drawings

Fig. 1A is a schematic view of a screening arrangement according to the invention.

Fig. 1B is a side view of a screening arrangement according to the invention.

Fig. 2A is a schematic diagram of a control system according to the present invention.

Fig. 2B is a cross-sectional view of a control system according to the present invention.

Fig. 3A is a side view of a mount according to the present invention.

Fig. 3B is an exploded view of a mount according to the present invention.

Fig. 4 is a perspective view of a positioning device according to the present invention.

Fig. 5 is an exploded view of a positioning device according to the present invention.

Fig. 6 is a perspective view of a positioning member according to the present invention.

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

Fig. 7B is a top view of a positioning member according to the present invention.

Fig. 8A is a perspective view of a check according to the present invention.

Fig. 8B is a front view of the check according to the present invention.

Fig. 9 is a perspective view of a connecting shaft according to the present invention.

Fig. 10A is a perspective view of a buffer device according to the present invention.

Fig. 10B is an exploded view of a buffering device according to the present invention.

Fig. 11A is a perspective view of a buffer nut according to the present invention.

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

Fig. 12A is a schematic view of the detent and keeper positions (pull-down state) according to the present invention.

Fig. 12B is a schematic view of the detent and keeper positions according to the present invention (locked state).

Fig. 12C is a schematic view of the detent and keeper positions according to the present invention (unlocked state).

Fig. 12D is a schematic view of the detent and keeper positions according to the present invention (raised state).

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.

As shown in fig. 1A to 11B, a shielding device suitable for being installed on a vehicle such as a motor home, a ship or a high-speed railway for shielding sunlight and adjusting light, the shielding device comprises a control system 1, a curtain 2 and an operating piece 3, wherein the operating piece 3 is arranged at the bottom of the curtain 2, the control system 1 controls the curtain 2 to lift, the control system 1 comprises a supporting device 10 and a positioning device 20, the curtain 2 is windably connected with the supporting device 10, the positioning device 20 is installed in the supporting device 10, the positioning device 20 comprises a positioning member 30 and a driving member 22, and 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, the curtain cloth 2 is conveniently unfolded and stored through the adjustment setting of the control system 1, the unfolded height of the curtain cloth 2 is randomly adjusted, the rising and the falling of the curtain cloth 2 are effectively regulated, and the installation requirements of different types of vehicles are met.

The positioning member 30 includes an outer housing 31, a lock pin 32, a check member 33, a positioning member 34, and a connecting shaft 37, where the check member 33 is fixedly connected to the outer side of the connecting shaft 37, the positioning member 34 is slidably connected to the connecting shaft 37, the positioning member 34 is axially slidably near or deviates from the check member 33, the positioning member 34 is provided with a positioning track 341, and the lock pin 32 extends from the outer housing 31 to the positioning track 341, so as to push the positioning member 34 to rotate or slide axially while rotating, and when the positioning member 34 and the check member 33 are interlocked, the outer housing 31 is locked by the lock pin 32, thereby locking the driving member 22.

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, each positioning area is distributed at a turning position of the inner wall 347, a first positioning area 343 is arranged at one lateral side of the inner wall 347, a second positioning area 344 and a third positioning area 345 are arranged at the other lateral side of the inner wall 347, so that the locking pin 32 relatively moves around the guide block 342, wherein the relative movement of the locking pin 32 refers to the locking pin 32 being fixed relative to the positioning member 34 in a radial direction, and the positioning member 34 relatively moves axially along with the rotation of the locking pin 32, so that the movement of the positioning member 34 can be more intuitively understood by using the relative movement of the locking pin 32 on the positioning track 341.

Wherein, 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 in the counterclockwise direction 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 are the unfolding direction corresponding to the curtain 2, when the curtain 2 is unfolded in the counterclockwise direction, the locking pin 32 pushes the positioning member 34 to rotate in the counterclockwise direction, when the curtain 2 is unfolded in the clockwise direction, the locking pin 32 pushes the positioning member 34 to rotate clockwise, and when the curtain 2 is unfolded in the counterclockwise direction, the reverse direction is uniformly understood.

Wherein the check member 33 is provided with an inner disc surface 334 and a plurality of check portions 331, the check portions 331 extend from the inner disc surface 334 to the positioning member 34 at intervals, the positioning member 34 is further provided with a plurality of protruding portions 348, the protruding portions 348 protrude outwards at intervals and face the check portions 331, the number of the protruding portions 348 is twice as large as that of the check portions 331, so that the check portions 331 selectively lock the protruding portions 348, and when the check portions 331 are engaged between the protruding portions 348, self-locking of the positioning member 34 is achieved, and the outer housing 31 is locked, so that the supporting device 10 cannot rotate.

Wherein the distance from the third positioning area 345 to the check member 33 is larger than the distance from the second positioning area 344 to the check member 33, when the lock pin 32 moves relatively to the third positioning area 345, the positioning member 34 approaches to the check member 33, the check portion 331 locks the protruding portion 348, when the lock pin 32 moves relatively to the first positioning area 343 or the third positioning area 345, the positioning member 34 deviates from the check member 33, so that the protruding portion 348 is separated from the check portion 331, the release of the positioning member 34 is realized, and the outer housing 31 is released, so that the outer housing 31 rotates along with the supporting device 10.

Wherein the positioning portion is provided with a gap 300, the gap 300 is formed between the non-return portion 331 and the adjacent protruding portion 348, the width of the gap 300 is suitable for the protruding portion 348 to rotationally slide out of the non-return portion 331, when the lock pin 32 relatively moves from the third positioning region 345 to the first positioning region 343.

The positioning member 30 further includes an inner connector 35 and a pair of shims 36, the positioning member 34 is provided with a pair of grooves 349, the grooves 349 are symmetrically formed in the inner cavity of the positioning member 34, the shims 36 are symmetrically mounted between the inner connector 35 and the grooves 349 of the positioning member 34, the connecting shaft 37 is provided with a protruding sliding rail 371, the inner connector 35 is axially slidably connected to the sliding rail 371, so that the positioning member 34 rotates relative to the inner connector 35, or the positioning member 34 rotates relative to the inner connector 35 and drives the inner connector 35 to axially move.

The connecting shaft 37 is in a flat structure, the inner connector 35 is internally arranged in the positioning member 34, and is connected with the positioning member 34 and the connecting shaft 37, so that the positioning member 34 can reciprocate along the sliding rail 371, slipping of the positioning member 34 in the spiral moving process is prevented, and adjustment of the directions of the connecting shaft 37 and the non-return member 33 is facilitated.

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

The driving member 22 comprises a main spring 221, a spring shaft 222, a driving piece 224 and an oil pressure damper 223, wherein the main spring 221 is sleeved in the spring shaft 222, the connecting shaft 37 and the driving piece 224 are respectively installed at two ends of the spring shaft 222, the driving piece 224 is coaxially aligned with the oil pressure damper 223, the driving piece 224 and the oil pressure damper 223 synchronously rotate, and the oil pressure damper 223 is used for slowing down the rotation speed of the driving piece 224, so that the curtain cloth 2 slowly rises when rising.

The supporting device 10 comprises an outer tube 11, a bracket 12 and a pair of supports 13, the curtain cloth 2 is windably connected to the outer tube 11, the positioning device 20 is axially installed in the outer tube 11, the supports 13 are symmetrically arranged at two ends of the outer tube 11, the bracket 12 is used for installing the shielding device on a carrier, the outer tube 11 is longitudinally provided with a limiting part 111, the limiting part 111 protrudes inwards in a radial direction, the driving part 224 and the hydraulic damper 223 are both provided with a first limiting groove 225, the limiting part 111 is jointed to the first limiting groove 225, the outer shell 31 is clamped to one end of the outer end, and when the outer tube 11 rotates, the driving part 224, the hydraulic damper 223 and the outer shell 31 are driven to rotate.

The control system 1 further comprises a buffer device 40, the buffer device 40 comprises a buffer shaft 41, a buffer nut 42 and a joint piece 43, the joint piece 43 connects the buffer shaft 41 and the support 13, the buffer shaft 41 is provided with a threaded portion 411 and a static contact portion 412, the static contact portion 412 abuts against the joint piece 43, the buffer nut 42 is sleeved on the threaded portion 411 of the buffer shaft 41 in a spiral movable manner, so that the buffer nut can axially reciprocate along the threaded portion 411, and is close to or deviated from the static contact portion 412, when the curtain 2 descends, the buffer nut 42 is deviated from the static contact portion 412, and when the curtain 2 ascends, the buffer nut 42 is close to the static contact portion 412 until the buffer nut 42 abuts against the static contact portion 412, and the curtain 2 cannot ascend. Therefore, the reserved length of the operating piece 3 is adjusted through the buffer device 40, the curtain cloth 2 is convenient to pull down in the accommodating state, the height requirements of different window coverings are met, and meanwhile, the abrasion to the curtain cloth 2 when the operating piece 3 rises to the top is reduced.

The distance between the buffer nut 42 and the static contact portion 412 is preset, and when the curtain cloth 2 is unfolded, the maximum distance between the buffer nut 42 and the static contact portion 412 is the preset distance, and the preset distance is suitable for keeping the rising height of the operating member 3, so as to meet the requirements of different window coverings. Thus, by adjusting the preset interval of the buffer nuts 42, the elevation height of the operating member 3 can be adjusted. For example, the height of the operating member 3 to be reserved is 3 inches, the preset distance between the buffer nuts 42 is reduced, when the curtain cloth 2 is unfolded, the maximum distance between the buffer nuts 42 and the static contact portion 412 is reduced, and the adjustment is fast and convenient, and the assembly is convenient.

The buffer nut 42 is provided with an outer disc 422, a second limiting groove 425 and a hexagonal nut, the hexagonal nut is arranged in the buffer nut 42 and is connected with the buffer shaft 41 and the buffer nut 42, the second limiting groove 425 is arranged on the outer disc 422 and is connected with the limiting part 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.

The buffer nut 42 is provided with an inner concave portion 423 and a plurality of protruding points 424, the inner concave portion 423 is recessed radially inwards from the second limiting groove 425, the protruding points 424 are distributed on the outer periphery of the outer disc 422 at intervals, the inner concave portion 423 is helpful to increase the elastic deformation force of the outer disc 422 of the buffer nut 42, so that the second limiting groove 425 can be connected to the outer tube 11 in a relatively sliding manner, the buffer nut 42 and the outer tube 11 are prevented from being excessively loosened or excessively tightened, when the outer tube 11 is excessively loosened, the buffer nut 42 is difficult to be effectively driven to synchronously rotate, when the outer tube 11 is excessively loosened, the buffer nut 42 is difficult to slide along the limiting portion 111 of the outer tube 11, the friction resistance is large, and the protruding points 424 are helpful to increase the wear resistance between the buffer nut 42 and the outer tube 11, so that the buffer nut 42 can relatively slide back and forth.

The engaging member 43 includes an engaging housing 431 and an engaging shaft 432, the engaging shaft 432 connects the stationary contact portion 412 and the support 13, and the engaging housing 431 is clamped to the other end of the outer tube 11, so as to rotate along with the rotation of the outer tube 11.

The positioning device 20 is mounted on one side of the outer tube 11, and the buffer device 40 is mounted on the other side of the outer tube 11.

Each support 13 is adjustably connected to a connecting shaft 37 of the positioning device 20 and to an engagement shaft 432 of the damping device 40, respectively. The support 13 includes an adjusting knob 131, an inner ring portion 132 and an adjusting portion 133, the inner ring portion 132 is disposed between the adjusting knob 131 and the adjusting portion 133, the adjusting portion 133 is provided with a tooth portion 134, the tooth portion 134 is elastically and selectively connected with the inner ring portion 132 or the adjusting knob 131, when the tooth portion 134 is connected with the adjusting knob 131, the adjusting knob 131 is adjusted to rotate the adjusting portion 133, when the tooth portion 134 is connected with the inner ring portion 132, the tooth portion 134 is separated from the adjusting knob 131, and the tooth portion 134 and the adjusting knob 131 cannot be interlocked to rotate. Therefore, the buffer device 40 is adjusted after being assembled through the adjusting knob 131 of the support 13, the preset distance between the buffer nut 42 and the static contact part 412 is set, the operation is simple, the control system 1 is not required to be disassembled for adjustment, shielding devices with different reserved heights are not required to be produced when the window is shipped, and the window is automatically adjusted according to different window coverings.

The adjusting portion 133 is further provided with an elastic element 135, a gear portion 138, a first engagement hole 136 and a second engagement hole 137, the first engagement hole 136 faces the connecting shaft 37 of the positioning device 20 or the engagement shaft 432 of the buffer device 40, the second engagement hole 137 faces the adjusting knob 131, the gear portion 138 extends radially outwards from the adjusting portion 133 in a ring shape, the elastic element 135 is sleeved on an outer ring of the adjusting portion 133, the elastic element 135 is disposed between the gear portion 138 and the inner ring portion 132, and when the inner ring portion 132 approaches the gear portion 138, the elastic element 135 generates an elastic force to push the inner ring portion 132 and the adjusting knob 131 to reset.

The fabric of the curtain cloth 2 is PVC fabric with glass fibers, so that the curtain cloth is light-shielding, flame-retardant and ultraviolet-proof.

During installation, the positioning device 20 or the buffer device 40 which are connected with each other is firstly adjusted through the adjusting knob 131 of the support 13, when the positioning device 20 is adjusted, whether the curtain 2 can be pulled down is confirmed, if the curtain 2 cannot be pulled down, the adjusting knob 131 is pressed inwards, the inner ring portion 132 approaches the gear portion 138, the convex tooth portion 134 is connected with the adjusting knob 131, the adjusting knob 131 is rotated to drive the adjusting portion 133 to rotate, the connecting shaft 37 is driven to rotate, the positioning piece 34 moves relative to the lock pin 32 through the inner connector 35, the lock pin 32 relatively moves from the third positioning area 345 to the first positioning area 343, the curtain 2 is pulled down, then the adjusting knob 131 is released, the elastic element 135 pushes the inner ring portion 132 to reset, and the adjusting knob 131 deviates from the convex tooth portion 134.

Determining the height of the window wrap, reserving the reserved height of the operating piece 3 in the accommodating state, adjusting the buffer device 40, if the reserved height is changed from 2 inches to 4 inches, fully expanding the curtain cloth 2, pulling the operating piece 3 to the bottommost end, enabling the buffer nut 42 to reach the farthest distance from the static contact part 412, then pressing the adjusting knob 131 inwards, enabling the convex tooth part 134 to be connected with the adjusting knob 131, rotating the adjusting knob 131, driving the adjusting part 133 to rotate, further driving the buffer shaft 41 to rotate clockwise or anticlockwise through the joint shaft 432, enabling the buffer nut 42 to move towards the static contact part 412, shortening the maximum preset distance between the buffer nut 42 and the static contact part 412, (wherein the rotation amplitude and the corresponding reserved height of the adjusting knob 131 can be determined according to numerical conversion, as described by reference products), after adjusting, loosening the adjusting knob 131, enabling the elastic element 135 to push the inner ring part 132 to reset, and enabling the buffer nut 42 to move towards the static contact part 412 to be moved towards the largest preset distance between the buffer nut 42 and the static contact part 412 if the buffer nut 412 is enlarged from 4 inches to the preset distance between the static contact part 134.

In use, the positioning device 20 and the buffer device 40 correspondingly operate along with the rotation of the outer tube 11, firstly, for the positioning device 20, the curtain 2 is pulled down by the operation member 3, the curtain 2 moves down and expands, the outer tube 11 drives the outer housing 31, the driving member 224 and the hydraulic damper 223 to rotate anticlockwise, the main spring 221 tightens to generate elastic force, the lock pin 32 of the outer housing 31 drives the positioning member 34 to rotate, the lock pin 32 relatively moves from the second positioning region 344 to the first positioning region 343, and in the first positioning region 343, the lock pin 32 drives the positioning member 34 to rotate anticlockwise as shown in fig. 11A;

If the outer housing 31, the driving member 224 and the hydraulic damper 223 are unfolded to a desired height, such as half of the unfolding, the pulling-down action is stopped, the outer housing 31 drives the lock pin 32 to slightly rotate clockwise due to the elastic force of the main spring 221, and meanwhile, the positioning member 34 continues to rotate counterclockwise due to inertia, so that the lock pin 32 relatively moves from the first positioning area 343 to the third positioning area 345, as shown in fig. 12B, the positioning member 34 slides axially and approaches the check member 33 until the protrusion 348 is self-locked to the check portion 331, thereby locking the positioning member 34 and the lock pin 32, and after the hand is released, the locking force between the positioning member 34 and the check member 33 counteracts the elastic force of the main spring 221, so that the curtain 2 is kept at a stop position, and a rapid stop at any height is realized;

When the locking pin 32 is pulled down again, the locking pin 32 rotates anticlockwise, and simultaneously, the locking pin 32 relatively moves from the third locating area 345 to the first locating area 343, as shown in fig. 12C, the locking pin 32 moves away from the check member 33 axially, until the protruding part 348 is separated from the check part 331, the locking pin 32 and the locking pin 34 are in an unlocked state, and the outer tube 11 rotates again;

After the hand is loosened, the curtain 2 is automatically lifted, the main spring 221 pushes the outer tube 11 to rotate clockwise by releasing the elastic force, the oil pressure damper 223 reduces the lifting speed of the curtain 2, so that the curtain 2 is slowly lifted, the locking pin 32 relatively moves from the first positioning area 343 to the second positioning area 344, and in the second positioning area 344, the locking pin 32 drives the positioning piece 34 to rotate clockwise, as shown in fig. 12D.

When the curtain cloth 2 is pulled down by the buffer device 40, the buffer nut 42 moves away from the static contact part 412 along with the rotation of the outer tube 11 until the outer tube 11 stops moving, and when the curtain cloth 2 is lifted up, the buffer nut 42 approaches the static contact part 412 along with the reverse rotation of the outer tube 11 until the buffer nut 42 abuts against the static contact part 412, so that the outer tube 11 stops rotating, and the operating element 3 is lifted up to a reserved height according to the preset interval of the buffer nut 42 to stop operation.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a shielding device, characterized by, including control system, curtain cloth and operating piece, the operating piece sets up in the bottom of curtain cloth, control system gets control the lift of curtain cloth, control system includes strutting arrangement, positioner and buffer unit, the curtain cloth can windingly connect in strutting arrangement, positioner installs in strutting arrangement, positioner includes locating element and actuating element, the locating element can selectively lock or release actuating element, make actuating element adjusts the curtain cloth to the preset height, wherein, strutting arrangement includes the outer tube, support and a pair of support, the curtain cloth can windingly connect in the outer tube, positioner installs axially in the outer tube, the support sets up symmetrically in the both ends of outer tube, the support is used for installing in the support, the outer tube vertically is equipped with the limit part, the limit part radially inwards protrudes, actuating element includes main spring, spring axle, actuating element and oil pressure buffer, the pivot, the spring axle is equipped with in the drive axle, the pivot joint is equipped with in the limit part, the pivot joint is equipped with in the drive axle, the pivot joint is equipped with in the limit part, the oil pressure buffer, the pivot joint is equipped with the damping part is equipped with in the pivot joint, the pivot joint is equipped with in the limit part, the oil pressure buffer, the damping part is equipped with the oil pressure damper is equipped with the pivot joint, the damping device is connected with the pivot, and the damping device is in the pivot joint is used for the damping, the damping device is rotated to the pivot, and the damping device is used for the damping, and the damping device, and is rotated, and is just in the damping, and is rotated to be rotated to, and is to the control to, and is characterized by the control to, and is to. The buffer nut can be sleeved on the threaded part of the buffer shaft in a spiral moving manner, can axially reciprocate along the threaded part and is close to or deviated from the static contact part, a preset interval is arranged between the buffer nut and the static contact part, after the curtain cloth is unfolded, the maximum distance between the buffer nut and the static contact part is the preset interval, the preset interval is suitable for retaining the automatic rising height of the operating piece, and when the operating piece automatically rises, the buffer nut axially outwards approaches the static contact part.

2. A screening arrangement according to claim 1, wherein the positioning member comprises an outer housing, a locking pin, a non-return element, a positioning element and a connecting shaft, the non-return element being fixedly connected to the outer side of the connecting shaft, the positioning element being slidably connected to the connecting shaft, the positioning element being axially slidably adjacent to or offset from the non-return element, the positioning element being provided with a positioning track, the locking pin extending from the outer housing towards the positioning track for pushing the positioning element.

3. The shielding device according to claim 2, wherein the positioning member is provided with a guide block, an inner wall and a plurality of positioning areas, a closed loop formed between the guide block and the inner wall forms the positioning track, each positioning area is distributed at a turning position of the inner wall, a first positioning area is arranged on one lateral side of the inner wall, and a second positioning area and a third positioning area are arranged on the other lateral side of the inner wall, so that the lock pin can relatively move around the guide block.

4. A screening arrangement according to claim 3, wherein the check member is provided with an inner disc surface and a plurality of check portions extending from the inner disc surface towards the positioning member at intervals, the positioning member being further provided with a plurality of protruding portions protruding axially outwards at intervals, facing the check portions, such that the check portions selectively lock the protruding portions.

5. The shade device of claim 4, wherein a spacing of the third location area from the check is greater than a spacing of the second location area from the check, the location being proximate to the check when the latch is moved relatively to the third location area, the check locking the tab, the location being offset from the check when the latch is moved relatively to the first location area or the third location area such that the tab is disengaged from the check.

6. The shielding device according to claim 5, wherein the number of the protruding portions is twice that of the non-return portions, the positioning member is provided with a gap formed between the non-return portions and the adjacent protruding portions, and a width of the gap is adapted to allow the protruding portions to rotationally slide out of the non-return portions.

7. The shielding apparatus as set forth in claim 6, wherein the positioning member further includes an inner connector provided with a pair of grooves symmetrically formed in the inner cavity of the positioning member and a pair of shims symmetrically mounted between the inner connector and the grooves of the positioning member, the connecting shaft being provided with a protruding slide rail, the inner connector being axially slidably connected to the slide rail.

8. A screening arrangement according to any one of claims 2-7, wherein the connecting shaft and the driving member are mounted at both ends of the spring shaft, respectively.