A retractable door guard

Abstract

The application discloses a telescopic protective door fence, which is provided with a supporting part extending into a winding pipe at one of a first support and a second support, a damper is installed on the supporting part, and the damper is connected with a winding shaft through a transmission structure; when the winding shaft rotates in a direction of winding a roller blind assembly, the damper can generate a movement resistance to the winding shaft and consume the elastic potential energy of a first torsional spring, so as to reduce the rotating speed of the winding shaft, thereby avoiding the situation that a person or other objects are hurt in the process of winding the roller blind assembly, and also avoiding the damage of the roller blind assembly and the winding shaft.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of protective articles, in particular to a telescopic protective door guard. BACKGROUND

[0002] In order to prevent infants, pets and the like from walking out of the room and causing accidents such as getting lost or being injured, people often set telescopic protective door guards at the positions of doors, staircases or corridors in the room. Such protective door guards mainly include upper and lower supports, a roller shutter assembly, a roller shaft and the like. The roller shaft is pivotally installed between the upper and lower supports. A torsion spring is arranged in the roller shaft to provide elastic torsion force to drive the roller shaft to rotate and wind the roller shutter assembly. The roller shutter assembly is installed on the roller shaft and can be pulled out for use. When not in use, the roller shaft is driven to rotate and recover the roller shutter by the elastic torsion force of the spring. However, since the spring torsion force is usually large, the recovery speed of the roller shutter is fast, and the fast-recovering roller shutter is prone to collide with people or other objects during the recovery process, and the roller shutter assembly itself and the roller shaft are also more likely to be damaged. SUMMARY

[0003] The main purpose of the present application is to provide a telescopic protective door guard to improve the safety and service life of the telescopic protective door guard.

[0004] To achieve the above-mentioned purpose, the present application provides a telescopic protective door guard, which comprises a roller shaft pivotally installed between a first support and a second support, a roller shutter assembly arranged on the roller shaft, and a first torsion spring arranged in the roller shaft to provide elastic force to drive the roller shaft to rotate and wind the roller shutter assembly. One of the first support and the second support is provided with a support member extending into the winding pipe. A damper is arranged on the support member. The roller shaft is connected to the damper through a transmission structure. The damper is used to provide movement resistance and reduce the rotation speed of the roller shaft when the roller shaft rotates in the direction of winding the roller shutter assembly.

[0005] The telescopic protective door guard of the present application is provided with a support member extending into the winding pipe at one of the first support and the second support. A damper is arranged on the support member. The damper is connected to the roller shaft through a transmission structure. When the roller shaft rotates in the direction of winding (i.e. recovering) the roller shutter assembly, the damper can generate movement resistance to the roller shaft and consume the elastic potential energy of the first torsion spring to reduce the rotation speed of the roller shaft, thereby avoiding the situation that the roller shutter assembly collides with people or other objects during the recovery process, and also avoiding damage to the roller shutter assembly itself and the roller shaft. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 It is a perspective view of the present application;

[0007] Figure 2 It is a partial sectional view of the present application;

[0008] Figure 3 Assembly view of the follower, damper, support and first seat;

[0009] Figure 4 Transverse sectional view of the present application;

[0010] Figure 5 Assembly view of the one-way clutch, damper, joint and support, etc;

[0011] Figure 6 Exploded view of the one-way clutch, damper, joint and support, etc;

[0012] Figure 7 Perspective view of the cover;

[0013] Figure 8 Exploded view of the first seat and torsion adjustment mechanism;

[0014] Figure 9 Perspective view of the driver;

[0015] Figure 10 Top view of the second torsion spring;

[0016] Figure 11 Perspective view of the follower. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0018] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, top, bottom, inner, outer, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings). If the certain posture changes, the directional indications also change accordingly.

[0019] In addition, if the description of "first" or "second" or the like is involved in the embodiments of the present application, the description of "first" or "second" or the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0020] The present application provides a telescopic protective door fence.

[0021] As shown in Figures 1 to 11 The telescopic protective door fence comprises a reel 3 pivotally installed between a first support 1 and a second support 2, a roller blind assembly arranged on the reel 3, and a first torsion spring 31 arranged in the reel 3, wherein the first torsion spring 31 is used to provide an elastic force for driving the reel 3 to rotate and wind the roller blind assembly. The first support 1 is provided with a support 32 extending into the reel 3, and the support 32 is in the form of a circular rod or a circular tube, of course, it can also be in the form of a square, triangular or elliptical tube or rod, and a damper 4 is arranged on the support 32. The reel 3 is connected with the damper 4 through a transmission structure, and the damper 4 is used to provide a movement resistance and reduce the rotation speed of the reel 3 when the reel 3 rotates in the direction of winding the roller blind assembly. Thus, the situation of hitting people or other objects during the winding process of the roller blind assembly can be avoided, and the damage to the roller blind assembly itself and the reel 3 can also be avoided.

[0022] Specifically, the damper 4 is a rotary damper, and has a rotating part 41. The transmission structure comprises a follower 5 arranged on the rotating part 41 of the damper 4, and the follower 5 is connected with the reel 3. When the reel 3 rotates in the direction of winding the roller blind assembly, the reel 3 drives the rotating part 41 of the damper 4 to rotate through the follower 5, and the rotation of the rotating part 41 provides resistance to the rotation of the reel 3.

[0023] In the embodiment of the present application, the transmission structure can be a part of the reel 3 or the damper 4, or a structure independent of the reel 3 and the damper 4. When the transmission structure is independent of the reel 3 and the damper 4, there are various embodiments, which are mainly selected according to the type, mode of action and structure of the damper 4. Taking the case that the damper 4 is a rotary damper, the rotary damper has a rotating part 41, the transmission structure includes a follower 5 arranged on the rotating part 41 of the damper, the follower 5 is connected with the reel 3, when the reel 3 rotates in the direction of winding (i.e. recycling) the roller assembly, the reel 3 drives the rotating part 41 of the damper to rotate through the follower 5, the rotation of the rotating part 41 provides resistance to the rotation of the reel 3 and consumes the elastic potential energy of the first torsional spring 31, thereby reducing the rotation speed of the reel 3.

[0024] It should be noted that the rotary damper has various embodiments in the prior art, the rotary damper has a fixed part and a rotating part 41, the rotating part 41 is rotatably inserted or sleeved in the fixed part, the fixed part and the rotating part 41 generally have an energy dissipation medium (such as oil), the fixed part is fixedly arranged on the support 32, the rotating part 41 is rotatable relative to the fixed part and provides external motion resistance, as to how to provide motion resistance, it is well known to those skilled in the art, which will not be described here.

[0025] Specifically, the side surface of the follower 5 has a first clamping groove 50, the reel 3 has a first protrusion 33 matched with the first clamping groove 50, after the first protrusion 33 is clamped into the first clamping groove 50, the reel 3 can drive the follower 5 to rotate, thereby when the reel 3 rotates in the direction of winding the roller assembly, the reel 3 drives the rotating part 41 of the damper to rotate through the follower 5, and the rotation of the rotating part 41 provides resistance to the rotation of the reel 3.

[0026] It should be noted that the first protrusion 33 can also be arranged on the follower 5, and the first clamping groove 50 matched with the first protrusion 33 can be arranged on the reel 3. Alternatively, other connection modes (such as connecting rod connection) can be used, which will not be described here.

[0027] Specifically, in order to make the damper not to generate movement resistance to the reel 3 when the reel 3 rotates in the direction of unrolling the roller blind assembly, the transmission structure further comprises a one-way clutch 6, the follower 5 is pivotally installed on the damper 4, the follower 5 defines an accommodating space inside, the one-way clutch 6 is accommodated in the accommodating space and forms transmission connection with the rotating part 41 of the damper 4, when the reel 3 rotates in the direction of rolling the roller blind assembly, the one-way clutch 6 enters the locking state, the damper 4 provides movement resistance to the rotation of the reel 3 through the one-way clutch 6 (and consumes the elastic potential energy of the first torsional spring 31, thereby reducing the rotation speed of the reel 3); when the reel 3 rotates in the direction of unrolling the roller blind assembly, the one-way clutch 6 enters the non-locking state, at this time, the follower 5 can rotate relative to the rotating part 41 of the damper 4, the damper 4 does not generate movement resistance to the rotation of the reel 3, thereby facilitating the user to unroll the roller blind assembly with relatively small force.

[0028] In the embodiment of the present application, the one-way clutch 6 has various embodiments, for example, the prior art is adopted. Alternatively, the following embodiment is adopted: the one-way clutch 6 comprises an inner race 61 and an outer race 62, the opposite end faces of the inner race 61 and the outer race 62 are formed with wedge blocks 60 matched with each other, the inner race 61 is connected with the rotating part 41 of the damper 4 and can drive the rotating part 41 to rotate, the outer race 62 is axially movably inserted into the follower 5 and can rotate with the follower 5. When the reel 3 rotates in the direction of rolling the roller blind assembly, the wedge blocks of the inner race 61 and the wedge blocks of the outer race 62 enter the locking state (that is, at this time, the one-way clutch 6 enters the locking state), the damper 4 provides movement resistance to the rotation of the reel 3 through the one-way clutch 6 and consumes the elastic potential energy of the first torsional spring 31, thereby reducing the rotation speed of the reel 3; when the reel 3 rotates in the direction of unrolling the roller blind assembly, the wedge blocks of the inner race 61 and the wedge blocks of the outer race 62 enter the non-locking state (that is, the wedge blocks of the inner race 61 and the wedge blocks of the outer race 62 are separated, and the one-way clutch 6 enters the non-locking state), at this time, the follower 5 can rotate relative to the rotating part 41 of the damper 4, the damper 4 does not generate movement resistance to the rotation of the reel 3, thereby facilitating the user to unroll the roller blind assembly with relatively small force.

[0029] Specifically, the rotating part 41 has a non-circular segment 422 which can be inserted into the inner race 61, the inner wall of the inner race 61 has a limiting part 611 matched with the non-circular segment 422, the non-circular segment 422 and the limiting part 611 are matched to prevent the inner race 61 and the rotating part 41 from rotating relative to each other, meanwhile, the end of the non-circular segment 422 away from the support 32 is spaced apart from the elastic arm which axially protrudes from the inner race 61, the number of the elastic arm is one or more, for example, Figure 5 、 6The two elastic arms are symmetrically arranged. The part of the elastic arm extending out of the inner race 61 extends out of the hook portion 421. When the hook portion 421 is not subjected to lateral force, the hook portion 421 can be hooked on the end face of the inner race 61 away from the support 32 to prevent the rotating portion 41 from moving axially relative to the inner race, and further lock the rotating portion 41 and the inner race 61, so that the inner race 61 can drive the rotating portion 41 to rotate synchronously. When the hook portion 421 is subjected to lateral force, the hook portion 421 can be elastically deformed in the direction of the ring of the inner race 61 under the action of the lateral force, so as to release the axial restriction between the inner race 61 and the rotating portion 41. The rotating portion and the inner race 61 are convenient to disassemble. Preferably, the non-circular section 422 is formed by cutting the surface of a circular rod.

[0030] Specifically, the follower 5 comprises a cover 51 and a base 52, and the cover 51 and the base 52 cooperatively form the accommodating space. The end face of the outer race 62 away from the support 32 is provided with a concave guide surface 53, the guide surface 53 comprises a horizontal section 531 and an inclined section 532 extending upward in the rolling direction of the roller shutter assembly, and the bottom end of the inclined section 532 is connected with the horizontal section 531. The cover 51 is provided with a driving member 511 which can move along the guide surface 53. When the driving member 511 is located at the top end position of the inclined section 532, the wedge block 60 of the outer race 62 and the wedge block 60 of the inner race 61 are in the locked state. When the driving member 511 is located at the horizontal section 531, the wedge block 60 of the outer race 62 and the wedge block 60 of the inner race 61 are in the unlocked state. Further, when the roller shaft 3 drives the follower 5 to rotate in the direction of rolling the roller shutter assembly, the driving member is located at the top end position of the inclined section 532, the wedge block 60 of the outer race 62 and the wedge block 60 of the inner race 61 are in the locked state, so that the follower 5 can drive the outer race 62 to rotate the inner race 61, thereby driving the rotating portion 41 of the damper 4 to rotate, and providing the movement resistance for the rotation of the roller shaft. When the roller shaft rotates in the direction of unfolding the roller shutter assembly, the wedge block 60 of the inner race 61 drives the wedge block 60 of the outer race 62 to rotate upward, and the driving member 511 of the cover 51 moves from the top end position of the inclined section 532 to the horizontal section 531, so as to move the outer race 62 to the position where the wedge block 60 of the outer race 62 and the wedge block 60 of the inner race 61 are in the unlocked state.

[0031] Specifically, the bottom of the cover 51 is open, the inner circumferential wall of the cover 51 is provided with an annular groove 512, the base 52 is a plate-shaped or sheet-shaped member matched with the bottom opening of the cover 51, and the edge of the base 52 is provided with a clamping strip 521 which can be clamped into the groove 512. The base 52 can be fixed to the bottom of the cover 51 by the clamping and fitting of the clamping strip 521 and the groove 512, and the bottom opening of the cover 51 is closed.

[0032] Specifically, the cover 51 and the base 52 are provided with an escape hole 54 corresponding to the position of the barb 421, so that the barb 421 can pass through the escape hole 54.

[0033] It can be understood that, in use, the first torsion spring 31 is generally fixed at one end and rotatable at the other end, and when the reel 3 rotates in the direction of unfolding the roller blind assembly, the elastic force of the first torsion spring 31 gradually increases, that is, the energy storage process; and when the reel 3 rotates in the direction of winding the roller blind assembly, the elastic force of the first torsion spring 31 gradually decreases, that is, the energy release process. As for how to install the first torsion spring 31, there are various embodiments, for example, one end of the first torsion spring 31 can be fixedly connected with the first support 1 or the second support 2 or the support member 32, and the other end is connected with the reel 3 directly or through the linkage 35.

[0034] In a preferred embodiment, the support member 32 is fixedly provided with a connector 34 at one end close to the damper 4, the fixed part of the damper 4 is fixedly provided on the connector 34, the first torsion spring 31 is sleeved on the support member 32, and one end is fixedly connected with the connector 34. Thus, the first torsion spring 31 is fixedly installed at one end. Specifically, the connector 34 is sleeve-shaped, and the support member 32, the connector 34 and the damper 4 are mutually sleeved and fixedly connected together by screws.

[0035] Preferably, the support member 32 is rotatably sleeved with the linkage 35, the other end of the first torsion spring 31 is connected with the linkage 35 and can rotate synchronously with the linkage 35 relative to the support member 32, and the linkage 35 is connected with the reel 3, so that the reel 3 can drive the other end of the first torsion spring 31 to rotate synchronously through the linkage 35.

[0036] Specifically, the outer side of the linkage 35 is provided with a second clamping groove 351, the reel 3 has a second protrusion matched with the second clamping groove 351, after the second protrusion is clamped into the second clamping groove 351, the reel 3 can drive the linkage 35 to rotate, and thus the linkage 35 can drive the other end of the first torsion spring 31 to rotate when the reel 3 rotates, and this connection mode is simple in structure and convenient to assemble.

[0037] Specifically, the first protrusion 33 and the second protrusion are spaced apart and provided on two relatively independent structures on the reel 3, or can be an integral structure. Similarly, the second protrusion can be provided on the linkage 35, and the reel 3 is provided with a second clamping groove 351 matched with the second protrusion. Alternatively, other connection modes (such as connecting rods) can be used, which will not be described here.

[0038] Specifically, the torsion adjusting mechanism is arranged on the first support 1, the supporting member 32 is arranged on the torsion adjusting mechanism, and the torsion adjusting mechanism is used to drive the supporting member 32 to rotate relative to the first support 1, so that the supporting member 32 drives the other end of the first torsion spring 31 to rotate, the elastic force of the first torsion spring 31 is adjusted, and the first torsion spring 31 can provide a more suitable elastic force for the outer pulling and rolling of the roller blind assembly.

[0039] Specifically, the first support 1 defines a pivot space, the torsion adjusting mechanism comprises a driven member 71, a second torsion spring 72 and a driving member 73, the driven member 71, the second torsion spring 72 and the driving member 73 are sequentially arranged in the pivot space from the direction close to the supporting member 32 to the direction away from the supporting member 32, the driven member 71 is connected with the supporting member 32 (and can control the supporting member 32 to rotate synchronously or remain stationary), and the driving member 73 has an operation part 731 for being controlled by a user to control the driving member 73 from outside.

[0040] Specifically, the operation part 731 can be a torsion head extending out of the first support 1, so that the user controls the driving member 73 to rotate by twisting the torsion head from outside; or the operation part 731 can be a non-circular hole (for example, a Phillips screw hole, a cross screw hole or a hexagonal countersunk hole) formed on the end of the driving member 73 away from the supporting member 32, and the first support 1 has a through hole 11 opposite to the non-circular hole, so that the user drives the driving member 73 to rotate by a tool (for example, a Phillips screwdriver, a cross screwdriver or a hexagonal wrench) from outside. The outer periphery of the second torsion spring 72 abuts against the inner wall of the pivot space, when the driving member 73 is driven to rotate by the operation part 731, the driving member 73 drives the second torsion spring 72 to contract radially and drives the driven member 71 to rotate at the same time.

[0041] It should be noted that when the outer periphery of the second torsion spring 72 abuts against the inner wall of the pivot space, the inner wall of the pivot space and the outer periphery of the second torsion spring 72 form a friction force that prevents the second torsion spring 72 from rotating relative to the pivot space, and when the driving member 73 rotates and drives the second torsion spring 72 to contract radially, the outer periphery of the second torsion spring 72 no longer abuts against the inner wall of the pivot space, and the inner wall of the pivot space and the outer periphery of the second torsion spring 72 no longer form a friction force that prevents the second torsion spring 72 from rotating or the friction force has been reduced to a range that does not prevent the second torsion spring 72 from rotating, so that the driving member 73 can drive the second torsion spring 72 to drive the driven member 71 to rotate, and the driven member 71 drives the supporting member 32 to rotate, so as to adjust the elastic force of the first torsion spring 31.

[0042] Specifically, the two ends of the second torsion spring 72 extend inwardly, and divide the inner periphery of the second torsion spring 72 into a superior arc region 721 (i.e. in this region, the arc between the two ends of the second torsion spring 72 is greater than 180 degrees) and an inferior arc region 722 (i.e. in this region, the arc between the two ends of the second torsion spring 72 is less than 180 degrees), the driving member 73 has a driving portion 732 extending into the inferior arc region 722, when the driving member 73 rotates, the driving portion 732 pushes one end of the second torsion spring 72 in the circumferential direction, and drives the second torsion spring 72 to contract radially, so that the driving member 73 can drive the second torsion spring 72 to rotate the driven member 71, thereby driving the support member 32 to rotate, to adjust the elastic force of the first torsion spring 31, the driven member 71 has a forcing portion 711 extending into the superior arc region 721.

[0043] Further, the driving member 73 and / or the driven member 71 is provided with a limiting ring 733, 713 extending towards the other, the limiting ring 733 of the driving member 73 can be used for the forcing portion 711 to extend into, and can guide and limit the rotation of the forcing portion 711, the limiting ring 713 of the driven member 71 can be used for the driving portion 732 of the driving member 73 to extend into, and can guide and limit the rotation of the driving portion 732, and improve the stability of the cooperation between the driven member 71 and the driving member 73.

[0044] When the support member 32 attempts to rotate under the elastic force of the first torsion spring 31, the forcing portion 711 will move one end of the second torsion spring 72 in a direction to drive the second torsion spring 72 to expand radially, at this time, the contact pressure between the outer wall of the second torsion spring 72 and the pivot space increases, and the friction force resisting the rotation of the second torsion spring 72 relative to the pivot space further increases, thereby preventing the support member 32 from rotating without the driving of the driving member 73, that is, the rotation of the support member 32 needs to be operated by rotating the driving member 73, and will not occur under the elastic force of the first torsion spring 31, thereby ensuring that the support member 32 will not rotate during the process of pulling out and unfolding or winding the roller blind assembly, and further ensuring that the pulling out and unfolding or winding operation of the roller blind assembly can be smoothly carried out.

[0045] Specifically, the second torsion spring 72 is spirally bent from a metal or plastic wire, and the cross section of the wire can be circular, oval or square, and is preferably square, when the second torsion spring 72 is square, the contact area between the outer periphery of the second torsion spring 72 and the inner wall of the pivot space is larger, and a larger friction force can be generated.

[0046] Specifically, the first support 1 (specifically, the side of the first support 1 facing the second support 2) is fixedly provided with a sleeve-shaped surrounding member 74, the inner periphery of the surrounding member 74 and the first support 1 form the pivot space, and one end of the driven member 71 close to the support member 32 passes through the surrounding member 74 and is connected with the support member 32, so that the driven member 71 can drive the support member to rotate when the driven member 71 rotates.

[0047] Specifically, the bottom wall of the surrounding member 74 extends outward to form a flange 741, and the surrounding member 74 is fixedly connected with the first support 1 at the flange 741 through screw or buckle structure or other connecting structure.

[0048] Specifically, the first support 1 is provided with a mounting groove 12 corresponding to the position of the surrounding member 74, which is suitable for the bottom of the surrounding member 74, the flange 741 is fixed in the mounting groove 12, and the mounting groove 12 is provided with the through hole 11 corresponding to the position of the operating part 731, so that the operating part 731 (when the operating part 731 is a torsion head) can extend out of the first support 1 or the operating tool (when the operating part 731 is a non-circular hole) can pass through and extend into to drive the driving part 73 to rotate.

[0049] Specifically, the driven part 71 and the supporting part 32 are integrally formed or are a split structure, when being a split structure, the driven part 71 is provided with an insertion part 712 with a non-circular cross section, the bottom of the supporting part 32 is provided with an insertion hole 751 suitable for the insertion part 712, and the insertion part 712 can be inserted into the insertion hole 751 after passing through the pivot space.

[0050] Specifically, the bottom of the supporting part 32 is provided with a sleeve 75, and the insertion hole 751 is formed at the lower end of the sleeve 75. Optionally, the sleeve 75 and the supporting part 32 are integrally formed or are a split structure fixedly connected together, when being fixedly connected together, the supporting part 32 is inserted into the sleeve 75, and the supporting part 32 and the sleeve 75 are fixedly connected through screws, rivets or buckles or other connecting structures.

[0051] Specifically, it further includes a pressing part 76, which is sleeved on the surrounding member 74 and is fixedly connected with the first support 1 through screws, so as to tightly press and fix the flange 741 of the surrounding member 74 in the mounting groove 12, thereby fixing and installing the surrounding member 74 in the mounting groove 12. Preferably, the pressing part 76 is annular.

[0052] Specifically, the edge of the pressing part 76 extends towards the supporting part 32 to form a surrounding edge 761 which can partially surround the linkage 35, one end of the linkage 35 close to the mounting groove 12 has an outwardly extending flange 352, the flange 352 is in contact with one end of the reel 3 close to the first support 1, so as to axially limit the flange, thereby making the linkage 35 only be able to rotate with the reel 3 and unable to axially move relative to the reel 3, at the same time, the surrounding member 74 and the sleeve 75 cover the linkage 35, and the sleeve 75 is axially limited in the linkage 35, thereby making the sleeve 75 and the supporting part 32 unable to axially move relative to the first support 1.

[0053] Specifically, the reel 3 is tubular in whole, the first and second convex portions 33 and 34 are formed by local inner arching of the tube wall of the reel 3, and the first and second convex portions 33 and 34 can be independent individuals arranged at intervals or can be integrated. When the first and second convex portions 33 and 34 are an integrated inner arching structure, the inner arching structure forms an axial slot with a lateral gap 331 on the outer periphery of the reel 3. The roller blind assembly includes a blind body 100, and a mounting end (i.e., an end connected with the reel 3) of the blind body 100 is fixedly provided with a connecting piece 101 matched with the axial slot, the connecting piece 101 is inserted into the slot, and the blind body 100 extends out of the slot through the gap 331. In this way, the roller blind assembly and the reel can be easily disassembled.

[0054] It can be understood that the roller blind assembly has various embodiments in the prior art and is well known to those skilled in the art, and the specific components and specific structures of the components will not be described here. For the same reason, the retractable protective door barrier can also include other structures, such as a safety lock arranged on the second support 2, a connecting rod arranged between the first support 1 and the second support 2 to connect the two, and the like. These structures have various embodiments in the prior art, and will not be described here.

[0055] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation based on the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A telescopic protective door barrier, comprising a reel (3) pivotally mounted between a first support (1) and a second support (2), a rolling shutter assembly disposed on the reel (3), and a first torsion spring (31) disposed within the reel (3), wherein the first torsion spring (31) is used to provide an elastic force for driving the reel (3) to rotate and retract the rolling shutter assembly; characterized in that: The first support (1) is provided with a support member (32) extending into the reel (3); the support member (32) is a round rod or a round tube structure as a whole; a damper (4) is provided on the support member (32); the reel (3) is connected to the damper (4) via a transmission structure; the damper (4) is used to provide movement resistance and reduce the rotation speed of the reel (3) when the reel (3) rotates in the direction of the reeling curtain assembly; The damper (4) is a rotary damper having a rotating portion (41). The transmission structure comprises a follower (5) provided on the rotating portion (41) of the damper (4). The follower (5) is connected to the reel (3). When the reel (3) rotates in the direction of the rolling curtain assembly, the reel (3) drives the rotating portion (41) of the damper (4) to rotate via the follower (5), and the rotation of the rotating portion (41) provides resistance to the rotation of the reel (3). The transmission structure further comprises a one-way clutch (6), wherein the one-way clutch (6) comprises an inner race (61) and an outer race (62); The rotating portion (41) has a non-circular section (422) that can be inserted into the inner seat ring (61), and the inner wall of the inner seat ring (61) has a limiting portion (611) that cooperates with the non-circular section (422). The inner seat ring (61) and the rotating portion (41) are prevented from rotating relative to each other through the cooperation between the non-circular section (422) and the limiting portion (611). At the same time, an elastic arm that axially extends out of the inner seat ring (61) is spaced apart at one end of the non-circular section (422) away from the support member (32). The part of the elastic arm that extends out of the inner seat ring (61) extends out of the hook portion (421). When the hook portion (421) is not subjected to a lateral force, the hook portion (421) can be hooked on the end surface of the inner seat ring (61) away from the support member (32); A joint (34) is fixedly provided at one end of the support member (32) close to the damper (4), a fixed portion of the damper (4) is fixedly provided at the joint (34), and a first torsion spring (31) is sleeved on the support member (32), and one end is fixedly connected to the joint (34).

2. The telescopic protective gate according to claim 1, characterized in that: A first slot (50) is provided on the side of the follower (5), and the reel (3) has a first convex portion (33) adapted to the first slot (50). After the first convex portion (33) is engaged with the first slot (50), the reel (3) can drive the follower (5) to rotate.

3. The telescopic protective gate according to claim 1, characterized in that: The follower (5) is pivotally mounted on the damper (4), and an accommodating space is defined inside the follower (5). The one-way clutch (6) is mounted in the accommodating space and forms a transmission connection with the follower (5) and the rotating portion (41) of the damper (4). When the reel (3) rotates in the direction of winding the roller blind assembly, the one-way clutch (6) enters a locked state, and the damper (4) provides motion resistance for the rotation of the reel (3) through the one-way clutch (6); and when the reel (3) rotates in the direction of unfolding the roller blind assembly, the one-way clutch (6) enters an unlocked state.

4. The telescopic protective gate according to claim 3, characterized in that: The inner race (61) and the outer race (62) have mating wedges (60) formed on their opposite end faces. The inner race (61) is connected to the rotating portion (41) of the damper (4) and can drive the rotating portion (41) to rotate. The outer race (62) can be axially moved and inserted into the follower (5) and can rotate with the follower (5).

5. The telescopic protective gate according to claim 4, characterized in that: The follower (5) includes a cover (51) and a base (52), the cover (51) and the base (52) cooperate to form the accommodation space, the end surface of the outer seat (62) away from the support (32) is provided with a concave guide surface (53), the guide surface (53) includes a horizontal section (531) and an inclined section (532) extending upward in the rolling direction of the rolling shutter assembly, the bottom end of the inclined section (532) is connected to the horizontal section (531), the cover ( 51) is provided with a driving member (511) that can move along the guide surface (53), when the driving member (511) is located at the top position of the inclined section (532), the wedge block (60) of the outer seat ring (62) and the wedge block (60) of the inner seat ring (61) are in a locked state, and when the driving member (511) is located at the horizontal section (531), the wedge block (60) of the outer seat ring (62) and the wedge block (60) of the inner seat ring (61) are in an unlocked state.

6. The telescopic protective gate according to claim 1, characterized in that: The supporting member (32) is rotatably sleeved with a linkage member (35). The other end of the first torsion spring (31) is connected to the linkage member (35) and can rotate synchronously with the linkage member (35) relative to the supporting member (32). The linkage member (35) is connected to the reel (3).

7. The telescopic protective gate according to claim 6, characterized in that: A second slot (351) is provided on the outer side of the linkage member (35), and the reel (3) has a second convex portion that is compatible with the second slot (351). After the second convex portion is engaged with the second slot (351), the reel (3) can drive the linkage member (35) to rotate.

8. The telescopic protective gate according to any one of claims 1 to 7, characterized in that: It also includes a torque adjustment mechanism provided on the first support (1), the support member (32) is mounted on the torque adjustment mechanism, and the torque adjustment mechanism is used to drive the support member (32) to rotate relative to the first support (1).

9. The telescopic protective gate according to claim 8, characterized in that: The first support (1) defines a pivoting space, and the torque adjustment mechanism includes a driven member (71), a second torsion spring (72) and an active member (73). The driven member (71), the second torsion spring (72) and the active member (73) are sequentially arranged in the pivoting space from a direction close to the support member (32) to a direction away from the support member (32). The driven member (71) is connected to the support member (32). The active member (73) has an operating portion (731) for user manipulation. The outer periphery of the second torsion spring (72) abuts against the inner wall of the pivoting space. When the operating portion (731) drives the active member (73) to rotate, the active member (73) drives the second torsion spring (72) to contract radially, and at the same time drives the second torsion spring (72) to drive the driven member (71) to rotate.

10. The telescopic protective gate according to claim 9, characterized in that: Both ends of the second torsion spring (72) extend inward, and divide the inner circumference of the second torsion spring (72) into a major arc zone (721) and a minor arc zone (722). The active member (73) has a driving portion (732) extending into the minor arc zone (722), and the driven member (71) has a forcing portion (711) extending into the major arc zone (721).

11. The telescopic protective gate according to claim 9, characterized in that: The first support is fixed with a sleeve-shaped surrounding member (74), the inner periphery of the surrounding member (74) and the first support (1) enclose the pivot space, and the end of the follower (71) close to the support member (32) passes through the surrounding member (74) and is connected to the support member (32).

12. The telescopic protective gate according to claim 9, characterized in that: The driven member (71) and the supporting member (32) are of an integrally formed structure or a split structure. In the case of the split structure, the driven member (71) is provided with an inserting portion (712) having a non-circular cross section, and the bottom of the supporting member (32) is provided with an inserting hole (751) adapted to the inserting portion (712). The inserting portion (712) can be plugged into the inserting hole (751) after passing through the pivoting space.

13. The telescopic protective gate according to claim 12, characterized in that: A sleeve (75) is provided at the bottom of the support member (32), and the insertion hole (751) is opened at the lower end of the sleeve (75).

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