CN109774433B

CN109774433B - Double-track shielding device and application method thereof

Info

Publication number: CN109774433B
Application number: CN201811454045.0A
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: 2021-04-09
Anticipated expiration: 2038-11-30
Also published as: CN109774433A

Abstract

The invention provides a double-rail shielding device and an application method thereof, and the double-rail shielding device comprises two groups of shielding devices and a support, wherein the shielding devices are arranged on the support in a laminating manner, each shielding device comprises a control system, a curtain cloth and an operating piece, the operating piece is arranged at the bottom of the curtain cloth, the control system can control the curtain cloth to lift, the control system comprises a supporting device and a buffer device, the supporting device comprises an outer pipe and a pair of supporting seats, the supporting seats are arranged on two sides of the support, the outer pipe is arranged between the supporting seats, the outer pipe is connected with the control system and the curtain cloth, and the buffer device is adjustably connected with the supporting seats so as to adjust the reserved height of each operating piece. Therefore, the light ray adjustability of the device is improved through the two groups of shielding devices, the installation is convenient, the use is simple and convenient, the overlapping performance is good, and the space occupied by the installation of the multilayer curtain cloth is reduced.

Description

Double-track shielding device and application method thereof

Technical Field

The invention relates to the technical field of shading, in particular to a double-rail shielding device suitable for vehicles and an application method thereof.

Background

The use of curtains has evolved from traditional indoor to fast moving outdoor, such as in high-speed rail, passenger ships, buses, and motor homes. The vehicle has the characteristics of small space and continuous movement, has higher requirements on the curtain, is convenient to store and expand, and also needs to adjust the expansion height of the curtain randomly according to different sunlight and use requirements, so that the vehicle is not limited to fully expanding the curtain to shield the window and block light.

The tracks are arranged on two sides of the frame of the curtain for the vehicle on the high-speed rail, the curtain can be opened and closed by manually pushing and pulling the pull-down handle, the curtain can be randomly stopped at any position, and the use stability and reliability of the curtain are improved.

On the other hand, in the conventional curtain, the curtain is often lifted to the top during the automatic lifting process, and a pull-down member is attached to the winding pipe. However, in an actual vehicle model, if a window wrap is attached to the roof of a motor home, and a window curtain is attached to the inside of the window wrap, the stored window curtain cannot be seen from the outside, which increases the appearance, but also makes it difficult to touch a pull-down handle. More importantly, the heights of window coverings of each vehicle type are different according to the design of the vehicle type, and the curtain with the specific pull-down handle cannot be produced according to each height, so that unnecessary production cost and use cost are increased. Meanwhile, the curtains on the existing vehicles are basically single-rail curtains, and only one curtain cloth is used for light adjustment, so that the using requirements of customers cannot be met.

Disclosure of Invention

The invention mainly aims to provide a double-track shielding device which overcomes the defects of the prior art, and the double-track shielding device has the advantages of increasing the light regulation performance, being convenient to install, simple and convenient to use, good in overlapping performance and reducing the space occupied by the installation of multilayer curtain cloth.

Another objective of the present invention is to provide a dual-rail shielding device, which reduces direct radiation of ultraviolet rays while maintaining light in a carriage by adjusting a double-layer curtain cloth, and the curtain cloth that completely shields light at night is convenient for blocking interference of external light, thereby being beneficial to creating a sleeping environment.

Another objective of the present invention is to provide a dual-rail shielding device, which can adjust the reserved length of the operating member through the buffering device, so as to facilitate the curtain cloth to be pulled down in the storage state, thereby meeting the height requirements of different window coverings, and at the same time, reduce the abrasion of the operating member when the operating member is lifted to the top, so that two groups of curtain cloth can be reserved at different heights, which is not only convenient for operation, but also does not affect the appearance.

The invention also aims to provide the double-rail shielding device, which is convenient for the curtain cloth to be unfolded and stored through the adjustment and setting of the control system, the unfolding height of the curtain cloth is adjusted at will, the ascending and descending of the curtain cloth are effectively mediated, and the installation requirements of different types of vehicles are met.

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

Another object of the present invention is to provide a shielding device, which realizes height self-locking when the curtain cloth is unfolded by the cooperation of the check member and the positioning member, is convenient to operate, meets the use requirements of most users, and is suitable for being installed on vehicles such as motor homes, ships, high-speed rails, etc.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: the double-rail shielding device comprises two groups of shielding devices and a support, wherein the shielding devices are mounted on the support in a stacking mode, each shielding device comprises a control system, a curtain cloth and an operating piece, the operating pieces are arranged at the bottom of the curtain cloth, the control system can control the curtain cloth to lift, the control system comprises a supporting device and a buffering device, the supporting device comprises an outer pipe and a pair of supporting seats, the supporting seats are mounted on two sides of the support, the outer pipe is arranged between the supporting seats, the outer pipe is connected with the control system and the curtain cloth, and the buffering device is adjustably connected to the supporting seats to adjust the reserved height of each operating piece.

According to an embodiment of the present invention, the buffer device includes a buffer shaft, a buffer nut, and an engaging member, the engaging member connects the buffer shaft and the support, the buffer shaft is provided with a threaded portion and a stationary contact portion, the stationary contact portion is adjacent to the engaging member, and the buffer nut is threadedly movably fitted on the threaded portion of the buffer shaft so as to axially reciprocate along the threaded portion, and approaches or deviates from the stationary contact portion.

According to an embodiment of the present invention, the shielding apparatus includes a first control system, a second control system, a first curtain group and a second curtain group, the first control system and the second control system are mounted in the bracket in a stacked manner, the first control system is located above the second control system, the first curtain group is windably connected to the first control system, the second curtain group is windably connected to the second control system, and a buffer device in each control system is capable of adjusting a reserved height of the corresponding curtain.

According to an embodiment of the invention, a preset distance is arranged between the buffer nut and the static contact part, when the curtain cloth is unfolded, the maximum distance between the buffer nut and the static contact part is the preset distance, and the preset distance is suitable for keeping the lifting height of the operating element.

According to an embodiment of the present invention, the outer tube is longitudinally provided with a limiting portion, the limiting portion protrudes radially inward, the cushion nut is provided with an outer disc, a second limiting groove, and a hexagonal nut, the hexagonal nut is internally disposed in the cushion nut and connects the cushion shaft and the cushion nut, and the second limiting groove is disposed on the outer disc and is coupled to the limiting portion of the outer tube.

According to an embodiment of the present invention, the cushion nut is provided with an inner concave portion and a plurality of protruding points, the inner concave portion is recessed from the second limiting groove radially inward, and the protruding points are distributed on the outer periphery of the outer disc at intervals, wherein the joint member includes a joint housing and a joint shaft, the joint shaft connects the stationary contact portion and the support, and the joint housing is clamped to the outer end of the outer tube.

According to an embodiment of the present invention, the holder includes an adjustment knob, an inner ring portion provided between the adjustment knob and the adjustment portion, and an adjustment portion provided with a toothed portion elastically selectively connecting the inner ring portion or the adjustment knob, wherein the adjustment portion is further provided with an elastic member, a stopper portion facing the connection shaft of the positioning device or the engagement shaft of the damper, a first engagement hole annularly extending outward from the adjustment portion, and a second engagement hole facing the adjustment knob, the elastic member being fitted over an outer ring of the adjustment portion, and the elastic member being provided between the stopper portion and the inner ring portion.

According to an embodiment of the invention, the cords of the first cord fabric group are made of a semi-shading fabric or a sunlight fabric, and the cords of the second cord fabric group are made of a full-shading fabric.

According to an embodiment of the present invention, each of the control systems further includes a positioning device, the positioning device is mounted on the other side of the outer tube relative to the buffering device, the positioning device includes a positioning member and a driving member, the positioning member selectively locks or releases the driving member, so that the driving member adjusts the curtain cloth to a preset height, the positioning member includes an outer shell, a lock pin, a check member, a positioning member and a connecting shaft, 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 close to or offset from the check member, the positioning member is provided with a positioning track, and the lock pin extends from the outer shell to the positioning track to push the positioning member.

According to an embodiment of the present invention, the positioning element is provided with a guiding block, an inner wall, and a plurality of positioning areas, the closed loop formed between the guiding block and the inner wall forms the positioning track, each positioning area is distributed at a turning point 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 relatively moves around the guiding block.

According to an embodiment of the present invention, the check member is provided with an inner disc surface and a plurality of check portions extending from the inner disc surface to the check member at intervals, and the check member is further provided with a plurality of protrusions protruding axially outward at intervals to face the check portion, so that the check portion selectively locks the protrusions.

According to an embodiment of the present invention, a distance between the third positioning area and the non-return member is greater than a distance between the second positioning area and the non-return member, when the lock pin relatively moves to the third positioning area, the positioning member is close to the non-return member, the non-return portion locks the protrusion, and when the lock pin relatively moves to the first positioning area or the third positioning area, the positioning member deviates from the non-return member, so that the protrusion is disengaged from the non-return portion.

A method of application of a dual rail shading device, comprising the steps of:

s100, determining the height of a window sleeve, adjusting the reserved heights of the first curtain cloth group and the second curtain cloth group, and adjusting the buffer devices of all the control systems through adjusting knobs of the support;

s200, when the curtain cloth is used, the first curtain cloth group and/or the second curtain cloth group are/is pulled down, and the pulling-down height of each curtain cloth is adjusted;

s300, when the curtain cloth is stored, the operating piece is loosened, the curtain cloth automatically rotates and contracts until a buffer nut of the buffer device is abutted to the static contact part, and the curtain cloth rises to a reserved height.

According to an embodiment of the present invention, the step S100 includes the steps of:

s110, the operating piece is pulled to the lowest end, the curtain cloth is unfolded, and the maximum distance is achieved between the buffer nut and the static contact part;

s120, pressing the adjusting knob inwards to enable the convex tooth part in the support to be elastically connected to the adjusting knob, and rotating the adjusting knob to drive the buffer shaft to rotate clockwise or anticlockwise;

s130, determining reserved heights of the first curtain cloth group and the second curtain cloth group, respectively adjusting, if the reserved heights are increased, adjusting and moving the buffer nut towards the direction of the static contact part to shorten the maximum preset distance between the buffer nut and the static contact part, and if the reserved heights are reduced, reversely adjusting and moving the buffer nut to enlarge the maximum preset distance between the buffer nut and the static contact part.

According to an embodiment of the present invention, the step S200 includes the steps of:

s210, pulling the curtain cloth downwards, moving the curtain cloth downwards to unfold, driving an outer tube to drive an outer shell, a driving piece and an oil pressure damper to rotate anticlockwise, tightening a main spring to generate elastic force, driving a positioning piece to rotate by a lock pin of the outer shell, moving the lock pin to a first positioning area from a second positioning area of the positioning piece relatively, and driving the positioning piece to keep rotating anticlockwise in the first positioning area by the lock pin;

s220 if the curtain cloth is unfolded to the expected height, the downward pulling action is stopped, the outer shell, the driving piece and the oil pressure damper stop rotating anticlockwise, the lock pin relatively moves from the first positioning area to the third positioning area, the positioning piece axially slides to be close to the check piece until the protruding portion is self-locked on the check portion, and the positioning piece and the lock pin are locked, so that the curtain cloth is kept at the stopping position.

According to an embodiment of the present invention, the step S300 includes the steps of:

s310, pulling down the curtain again, rotating the lock pin anticlockwise to drive the positioning piece to rotate, moving the lock pin to the first positioning area from the third positioning area relatively, axially deviating the non-return piece to move by the positioning piece until the protruding part is separated from the non-return part, and enabling the lock pin and the positioning piece to be in an unlocked state and the outer pipe to rotate again;

after S320 hands are loosened, the curtain cloth automatically rises, through the release of elastic force, the main spring pushes the outer tube to rotate clockwise, the oil pressure damper reduces the rising speed of the curtain cloth, the lock pin relatively moves from the first positioning area to the second positioning area, in the second positioning area, the lock pin drives the positioning piece to keep rotating clockwise, the buffer nut is close to the static contact part along with the reverse rotation of the outer tube until the buffer nut supports against the static contact part, so that the outer tube stops rotating.

Drawings

Fig. 1 is a schematic view of a dual rail shading arrangement according to the present 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 cradle according to the present invention.

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

Figure 7A is a side view of a spacer 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 a check according to the present disclosure.

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 cushioning device according to the present invention.

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

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

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

Fig. 12B is a schematic view of the positions of the lock pin and the positioning member according to the present invention (locked state).

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

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

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

As shown in fig. 1 to 11B, a double-track shielding device is adapted to be mounted on a vehicle such as a motor home, a ship or a high-speed rail for blocking sunlight and adjusting light, and includes two sets of shielding devices and a bracket 12, the shielding devices are mounted on the bracket 12 in a stacked manner, each of the shielding devices includes a control system 1, a curtain fabric 2 and an operating member 3, the operating member 3 is disposed at the bottom of the curtain fabric 2, the control system 1 is capable of controlling the curtain fabric 2 to ascend and descend, the control system 1 includes a support device 10 and a buffer device 40, the support device 10 includes an outer tube 11 and a pair of supports 13, the supports 13 are mounted at two sides of the bracket 12, the outer tube 11 is disposed between the supports 13, the outer tube 11 connects the control system 1 and the curtain fabric 2, and the buffer device 40 is adjustably connected to the supports 13, the reserve height of each of the operating members 3 is adjusted. Thereby through two sets of shielding devices, increase its light regulation nature, simple to operate, it is simple convenient to use, the overlap nature is good, reduces the space that multilayer curtain cloth 2 installation occupy.

The shielding device comprises a first control system 101, a second control system 102, a first curtain group 201 and a second curtain group 202, wherein the first control system 101 and the second control system 102 are mounted in the bracket in a stacked manner, the first control system 101 is located above the second control system 102, the first curtain group 201 is windably connected to the first control system 101, the second curtain group 202 is windably connected to the second control system 102, and the buffer device 40 in each control system 1 can adjust the reserved height of the corresponding curtain 2.

The curtain cloth of the first curtain cloth group 201 is made of a semi-shading type fabric or a sunlight fabric, and the curtain cloth of the second curtain cloth group 202 is made of a full-shading type fabric.

The control system 1 further comprises a positioning device 20, the curtain 2 is windably connected to the support device 10, the positioning device 20 is mounted in the support device 10, the positioning device 20 comprises a positioning member 30 and a driving member 22, the positioning member 30 selectively locks or releases the driving member 22, so that the driving member 22 adjusts the curtain 2 to a preset height. Therefore, the curtain cloth 2 can be conveniently unfolded and stored through the adjustment and setting of the control system 1, the unfolding height of the curtain cloth 2 can be adjusted at will, the curtain cloth 2 can be effectively stopped from ascending and descending, and the installation requirements of different types of vehicles can be 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, 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 slidable to approach or deviate from the check member 33, the positioning member 34 is provided with a positioning track 341, the lock pin 32 extends from the outer housing 31 to the positioning track 341 to push the positioning member 34 to axially slide while rotating or 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 to further lock 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, a closed loop formed between the guide block 342 and the inner wall 347 forms the positioning track 341, each of the positioning areas is distributed at a turning point of the inner wall 347, one lateral side of the inner wall 347 is provided with a first positioning area 343, and the other lateral side of the inner wall 347 is provided with a second positioning area 344 and a third positioning area 345, so that the lock pin 32 relatively moves around the guide block 342, wherein the relative movement of the lock pin 32 refers to the lock pin 32 being fixed in a radial direction relative to the positioning member 34, and the positioning member 34 relatively moves in an axial direction along with the rotation of the lock pin 32, and in order to be more intuitively understood, the relative movement of the lock pin 32 on the positioning track 341 is used herein to describe the movement of the positioning member 34.

Wherein, when the lock pin 32 pushes the positioning member 34 to rotate in the counterclockwise direction, the lock pin 32 relatively moves from the second positioning area 344 to the first positioning area 343, when the positioning member 34 continuously rotates in the counterclockwise direction with respect to the lock pin 32, the lock pin 32 relatively moves from the first positioning area 343 to the third positioning area 345, when the lock pin 32 pushes the positioning member 34 to rotate in the clockwise direction, the lock pin 32 relatively moves from the third positioning area 345 to the first positioning area 343, wherein, the clockwise direction and the counterclockwise direction correspond to the deployment direction of the curtain 2, when the curtain 2 is deployed in the counterclockwise direction, the lock pin 32 pushes the positioning member 34 to rotate in the counterclockwise direction, when the curtain 2 is deployed in the clockwise direction, the opposite direction is that the lock pin 32 pushes the positioning member 34 to rotate in the clockwise direction, it is assumed here that the deployment of the curtain 2 is counterclockwise, and vice versa.

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

When the lock pin 32 relatively moves to the third positioning region 345, the positioning element 34 approaches the check element 33, the check element 331 locks the protrusion 348, and when the lock pin 32 relatively moves to the first positioning region 343 or the third positioning region 345, the positioning element 34 deviates from the check element 33, so that the protrusion 348 is disengaged from the check element 331, the positioning element 34 is released, and the outer housing 31 rotates along with the support device 10.

Wherein the positioning part is provided with a gap 300, the gap 300 is formed between the check part 331 and the adjacent protrusion 348, the width of the gap 300 is suitable for the protrusion 348 to rotatably slide out of the check part 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 comprises an inner member 35 and a pair of gaskets 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 gaskets 36 are symmetrically installed between the inner member 35 and the grooves 349 of the positioning member 34, the connecting shaft 37 is provided with convex sliding rails 371, the inner member 35 is axially slidably connected to the sliding rails 371, so that the positioning member 34 is opposite to the rotation of the inner member 35, or the positioning member 34 is opposite to the rotation of the inner member 35 and simultaneously drives the axial movement of the inner member 35.

The connecting shaft 37 is of a flat structure, the inner connecting piece 35 is arranged in the positioning piece 34 to connect the positioning piece 34 and the connecting shaft 37, so that the positioning piece 34 can move back and forth along the sliding rail 371, the positioning piece 34 is prevented from slipping in the spiral moving process, and the connecting shaft 37 and the check piece 33 can be adjusted in direction.

Wherein, the non-return piece 33 is further provided with a connecting hole 332 and a clamping part 333, the connecting hole 332 is arranged in the middle of the inner disk surface 334, the outer end of the connecting shaft 37 penetrates through the connecting hole 332, and the clamping part 333 clamps the outer side of the connecting shaft 37.

The driving member 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 two 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, and the oil pressure damper 223 is used for slowing down the rotation speed of the driving member 224, so that the curtain fabric 2 rises slowly when rising.

Support arrangement 10 includes outer tube 11 and a pair of support 13, curtain 2 can connect with convoluteing outer tube 11, positioner 20 axially install in outer tube 11, support 13 set up symmetrically in the both ends of outer tube 11, outer tube 11 vertically is equipped with spacing 111, spacing 111 is radially inwards protruding, driving piece 224 with oil pressure damper 223 all is equipped with first spacing groove 225, spacing 111 joint in first spacing groove 225, outer shell 31 joint in the one end of outer end, when outer tube 11 is rotatory, drive driving piece 224, oil pressure damper 223 and outer shell 31 are rotatory.

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 43, the joint 43 is connected with the buffer shaft 41 and the support 13, the buffer shaft 41 is provided with a thread part 411 and a static contact part 412, the static contact part 412 is adjacent to the joint 43, the buffer nut 42 is sleeved on the thread part 411 of the buffer shaft 41 in a spirally movable manner, so as to axially reciprocate along the thread part 411 and approach or deviate from the static contact part 412, when the curtain cloth 2 descends, the buffer nut 42 deviates from the static contact part 412, when the curtain cloth 2 ascends, the buffer nut 42 approaches the static contact part 412, until the buffer nut 42 abuts against the static contact part 412, and the curtain cloth 2 cannot ascend. Thereby can adjust the reserve length of operating part 3 through buffer 40, be convenient for curtain cloth 2 and carry out the pull-down operation under the state of accomodating, satisfy the high demand of different window casings, reduce simultaneously operating part 3 rises to the top, to the wearing and tearing of curtain cloth 2.

The buffer nut 42 and the static contact part 412 are provided with a preset interval, when the curtain cloth 2 is unfolded, the maximum distance between the buffer nut 42 and the static contact part 412 is the preset interval, and the preset interval is suitable for keeping the lifting height of the operating part 3, so that the requirements of different window sleeves are met. Thus, by adjusting the preset pitch of the cushion nut 42, the rising height of the operating element 3 is adjusted. For example, the height of the operating element 3 to be reserved is 3 inches, the preset distance between the buffer nuts 42 is reduced, and when the curtain fabric 2 is completely unfolded, the maximum distance between the buffer nuts 42 and the static contact part 412 is reduced, so that the adjustment is quick 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 hexagon nut, the hexagon nut is arranged in the buffer nut 42 and 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 jointed 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 to and fro along the buffer shaft 41.

The cushion nut 42 is provided with an inner recess 423, which is recessed radially inward from the second retaining groove 425, the protruding points 424 are spaced apart from the outer circumference of the outer disc 422, the inner recesses 423 help increase the elastic deformation force of the outer disc 422 of the cushion nut 42, so that the second limiting groove 425 is relatively slidably coupled to the outer tube 11, preventing the coupling between the buffer nut 42 and the outer tube 11 from being too loose or too tight, when the outer pipe 11 is too loose, the buffer nut 42 is difficult to be driven to rotate synchronously by the outer pipe 11, and when the outer pipe is too tight, the cushion nut 42 is hard to slide along the stopper portion 111 of the outer tube 11, the frictional resistance is large, the protruding points 424 help to increase the wear resistance between the cushion nut 42 and the outer tube 11, facilitating the relative reciprocal sliding of the cushion nut 42.

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

The positioning device 20 is installed at one side of the outer tube 11, and the buffering device 40 is installed at the other side of the outer tube 11.

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 damping device 40. The holder 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 protruding tooth portion 134, the protruding tooth portion 134 is elastically and selectively connected to the inner ring portion 132 or the adjusting knob 131, when the protruding tooth portion 134 is connected to the adjusting knob 131, the adjusting knob 131 is adjusted to rotate the adjusting portion 133, when the protruding tooth portion 134 is connected to the inner ring portion 132, the protruding tooth portion 134 is separated from the adjusting knob 131, and the protruding tooth portion 134 and the adjusting knob 131 cannot be rotated in an interlocking manner. Thereby through adjust knob 131 of support 13, can adjust after assembling buffer 40 sets up buffer nut 42 with the preset interval between the quiet portion 412, easy operation need not to unpack control system 1 adjusts, also need not to produce different shield devices of reserving the height when dispatching from the factory, according to different window wrap, can adjust by oneself.

Wherein the adjusting portion 133 is further provided with an elastic element 135, a shift portion 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 damping device 40, the second engaging hole 137 faces the adjusting knob 131, the shift portion 138 annularly extends from the adjusting portion 133 in a radial direction, the elastic element 135 is sleeved on an outer ring of the adjusting portion 133, the elastic element 135 is disposed between the shift portion 138 and the inner ring portion 132, and when the inner ring portion 132 approaches the shift portion 138, the elastic element 135 generates an elastic force to push the inner ring portion 132 and the adjusting knob 131 to return.

The fabric of the cord fabric 2 of the first cord fabric 201 is a PVC fabric with glass fibers, so that the cord fabric can shield light, resist flame and prevent ultraviolet rays, and can be a yarn curtain, so that the cord fabric is suitable for being used in the daytime, and the second cord fabric 202 is a full-light-shielding fabric, so that the cord fabric is suitable for being used at night.

When in installation, the adjusting knob 131 of the support 13 is used to adjust the connected positioning device 20 or the buffer device 40, when the positioning device 20 is adjusted, whether the curtain cloth 2 can be pulled down is confirmed, if the curtain cloth 2 can not be pulled down, the adjusting knob 131 is pressed inwards, the inner ring portion 132 is moved toward the stop portion 138, the teeth portion 134 is connected to the adjusting knob 131, the adjusting knob 131 is rotated, and the adjusting portion 133 is rotated, thereby driving the connecting shaft 37 to rotate, the positioning member 34 moves relative to the lock pin 32 through the inner connecting member 35, so that the lock pin 32 is relatively moved from the third positioning region 345 to the first positioning region 343 to pull down the curtain 2, and then the adjusting knob 131 is released, the elastic element 135 pushes the inner ring portion 132 to return, 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 element 3 in the storage state, adjusting the buffering device 40, if the reserved height is changed from 2 inches to 4 inches, completely unfolding the curtain fabric 2, pulling the operating element 3 to the bottom end, the buffering nut 42 reaching the farthest distance from the static contact part 412, then pressing the adjusting knob 131 inwards, so that the convex tooth part 134 is connected with the adjusting knob 131, rotating the adjusting knob 131 to drive the adjusting part 133 to rotate, further driving the buffering shaft 41 to rotate clockwise or counterclockwise through the engaging shaft 432, so that the buffering nut 42 moves towards the static contact part 412, and shortening the maximum preset distance between the buffering 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 value conversion, as described in reference to the product), after adjustment, the adjusting knob 131 is released, the elastic element 135 pushes the inner ring portion 132 to return, the adjusting knob 131 deviates from the convex tooth portion 134, and if the distance is changed from 4 inches to 2 inches, reverse adjustment is performed, so that the preset distance between the cushion nut 42 and the stationary contact portion 412 is enlarged.

When in use, the positioning device 20 and the buffering device 40 operate correspondingly with the rotation of the outer tube 11, first, for the positioning device 20, the curtain 2 is pulled down by the operating device 3, the curtain 2 moves downward and unfolds, the outer tube 11 drives the outer shell 31, the driving part 224 and the oil pressure damper 223 to rotate counterclockwise, the main spring 221 is tightened to generate an elastic force, the lock pin 32 of the outer shell 31 drives the positioning member 34 to rotate, the lock pin 32 relatively moves from the second positioning area 344 to the first positioning area 343, and in the first positioning area 343, the lock pin 32 drives the positioning member 34 to rotate counterclockwise, as shown in fig. 11A;

when the vehicle is deployed to a desired height, for example, half of the deployment, the pull-down operation is stopped, the counterclockwise rotation of the outer case 31, the driver 224 and the hydraulic damper 223 is stopped, due to the elastic force of the main spring 221, the outer housing 31 carries the latch 32 to rotate clockwise slightly, at the same time, the positioning member 34 continues to rotate counterclockwise due to inertia, so that the lock pin 32 relatively moves from the first positioning region 343 to the third positioning region 345, as shown in fig. 12B, the positioning member 34 slides axially, approaching the check member 33, until the protrusion 348 self-locks with the check portion 331, the positioning element 34 and the lock pin 32 are further locked, and after the hand is released, the elastic force of the main spring 221 is offset by the locking force between the positioning element 34 and the check element 33, so that the curtain cloth 2 is kept at the stop position, and the curtain cloth 2 is quickly stopped at any height;

when the outer tube 11 is pulled down again, the lock pin 32 rotates counterclockwise, and the lock pin 32 moves relatively from the third positioning region 345 to the first positioning region 343 while driving the positioning member 34 to rotate, as shown in fig. 12C, the positioning member 34 axially deviates from the check member 33 to move until the protrusion 348 is disengaged from the check member 331, the lock pin 32 and the positioning member 34 are in the unlocked state, and the outer tube 11 rotates again;

after the hand is released, the curtain cloth 2 automatically ascends, the main spring 221 pushes the outer tube 11 to rotate clockwise by releasing the elastic force, the oil pressure damper 223 reduces the ascending speed of the curtain cloth 2, so that the curtain cloth 2 ascends slowly, the lock pin 32 relatively moves from the first positioning area 343 to the second positioning area 344, and in the second positioning area 344, the lock pin 32 drives the positioning element 34 to keep rotating clockwise, as shown in fig. 12D.

In the damping device 40, when the curtain cloth 2 is pulled down, the damping nut 42 deviates from the static contact part 412 along with the rotation of the outer tube 11 and moves until the outer tube 11 stops moving; when the curtain cloth 2 ascends, 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 ascends to a reserved height to stop operating according to the preset distance of the buffer nut 42.

The foregoing shows and describes the general principles, essential 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, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A double-rail shielding device comprises two groups of shielding devices and a bracket, wherein the shielding devices are arranged on the bracket in a stacking manner, each shielding device comprises a control system, a curtain and an operating part, the operating part is arranged at the bottom of the curtain, the control system can control the automatic ascending of the curtain, the control system comprises a supporting device and a positioning device, the positioning device comprises a positioning component and a driving component, the positioning component can selectively lock or release the driving component, and the driving component controls the automatic ascending of the curtain, the double-rail shielding device is characterized in that the control system further comprises a buffer device, the supporting device comprises an outer pipe and a pair of supporting seats, the supporting seats are arranged at two sides of the bracket, the outer pipe is arranged between the supporting seats, and the outer pipe is connected with the control system and the curtain, the buffer device is adjustably connected to the support to adjust the reserved height of the operating part, wherein the buffer device comprises a buffer shaft, a buffer nut and a joint part, the joint part is connected with the buffer shaft and the support, the buffer shaft is provided with a thread part and a static contact part, the static contact part is positioned on the outer side and is adjacent to the joint part, the buffer nut can be sleeved on the thread part of the buffer shaft in a spirally movable manner to axially reciprocate along the thread part and be close to or deviate 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 reserving the automatic rising height of the operating part, and when the operating part automatically rises, the buffer nut is axially outwards close to the static contact part, wherein the holder includes an adjustment knob, an inner ring portion, and an adjustment portion, the inner ring portion is disposed between the adjustment knob and the adjustment portion, the adjustment portion is provided with a tooth portion elastically selectively connecting the inner ring portion or the adjustment knob, the adjustment portion is further provided with an elastic element, a stopper portion, a first engagement hole, and a second engagement hole, the first engagement hole faces the connection shaft of the positioning device or the engagement shaft of the damping device, the second engagement hole faces the adjustment knob, the stopper portion extends radially outward from the adjustment portion in a ring shape, the elastic element is fitted over an outer ring of the adjustment portion, and the elastic element is disposed between the stopper portion and the inner ring portion.

2. The double rail shielding device according to claim 1, wherein the outer pipe is longitudinally provided with a limiting portion which protrudes radially inward, the buffer nut is provided with an outer disc, a second limiting groove, and a hexagonal nut, the hexagonal nut is disposed in the buffer nut and connects the buffer shaft and the buffer nut, the second limiting groove is formed in the outer disc and is engaged with the limiting portion of the outer pipe, wherein the buffer nut is provided with an inner recess which is recessed radially inward from the second limiting groove, and a plurality of protruding points which are distributed at intervals on the outer periphery of the outer disc, wherein the engaging member includes an engaging housing which connects the stationary contact portion and the support, and an engaging shaft which engages with an outer end of the outer pipe.

3. The dual rail shielding device as claimed in claim 2, wherein the upper curtain is made of a semi-opaque fabric or a sun fabric, and the lower curtain is made of a full-opaque fabric.

4. A method for applying the double-track shielding device according to any one of claims 1 to 3, comprising the steps of:

s100, determining the height of a window sleeve, adjusting the reserved height of each curtain cloth, adjusting the buffer devices of each control system through the adjusting knobs of the supports, wherein the static contact parts are positioned on the outer sides and adjacent to the joint parts, and the method specifically comprises the following steps:

s130, determining the reserved height of each curtain cloth, respectively adjusting, if the reserved height is increased, adjusting and moving the buffer nut towards the static contact part to shorten the maximum preset distance between the buffer nut and the static contact part, and if the reserved height is reduced, adjusting and moving the buffer nut reversely to enlarge the maximum preset distance between the buffer nut and the static contact part;

s200, when the curtain cloth is used, the curtain cloth is pulled down, and the pulling-down height of each curtain cloth is adjusted;

s300, when the curtain cloth is stored, the operating piece is loosened, the curtain cloth automatically rotates and contracts until a buffer nut of the buffer device abuts against the outer static contact part, and the curtain cloth automatically rises to a reserved height.

5. The application method according to claim 4, wherein the step S200 comprises the steps of:

6. The application method according to claim 5, wherein the step S300 comprises the steps of: