Self-locking base and retractable door fence with same

Abstract

According to the self-locking base and the retractable door fence with the self-locking base, a pivoting piece fixedly connected with a rotary drum is arranged on a base body of the self-locking base in a pivoting mode, a self-locking mechanism is arranged on the self-locking base, and when the pivoting piece pivots towards a rolling shutter body to reach or exceed a preset speed, the pivoting piece is locked through the self-locking base, so that the rolling shutter body is rolled up. Compared with the prior art, a self-locking function is added on the basis of the prior art, when the rotating drum pivots towards the rolling shutter body, the torsion spring releases compression and releases elastic force, so that the rotating drum and the pivoting piece reach or exceed the preset speed, the self-locking mechanism is triggered to lock the pivoting piece, and automatic rolling of the shutter body is stopped; the situation that the curtain body hits a human body and hits the human body in the automatic rolling process is effectively avoided, or the situation that the curtain body is damaged due to the fact that the curtain body collides with hard objects and sharp objects in the swinging process is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of door rails, in particular to a self-locking base and a telescopic door rail having the same. Background Art

[0002] Retractable gates are mostly used indoors or in courtyards. Retractable gates are used to separate indoor spaces or courtyard spaces so as to form different temporary activity spaces indoors or in the courtyard for infants and young children to move around. Specifically, the retractable gate includes a lock, a base, a rotating drum and a curtain body. The rotating drum can be pivotally installed between the lock and the base, and one end of the curtain body is arranged on the rotating drum. A torsion spring is arranged in the rotating drum. The rotational elastic force of the torsion spring can cause the rotating drum to rotate in one direction around its own axis, so that the rotating drum can retract the curtain body. When the rotating drum pivots in the direction of unfolding the curtain body, it can drive the torsion spring to compress and accumulate force. When the rotating drum pivots in the direction of rolling up the curtain body, the torsion spring is decompressed and releases the elastic force to accelerate the pivoting speed of the rotating drum. When in use, it is mainly achieved by grasping the end of the curtain body and pulling it, so as to unfold the curtain body to an appropriate length and then fix the end of the curtain body.

[0003] There are some shortcomings in the above-mentioned prior art: when the curtain body is unfolded and the end is not fixed, loosening the end of the curtain body will cause the curtain body to automatically roll up, and due to the influence of the release of the elastic force of the torsion spring, the curtain body automatically rolls up at a faster speed, causing the curtain body to swing during the automatic rolling process. Especially when the free end of the curtain body is connected to a hard object, it is easy to hit the human body and cause injury to the human body when swinging, or the curtain body collides with hard or sharp objects during the swinging process, causing damage to the curtain body. Utility Model Content

[0004] The main purpose of the utility model is to provide a self-locking base and a telescopic door rail having the same, aiming to solve the deficiencies mentioned in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides a self-locking base, comprising:

[0006] seat body;

[0007] A pivoting member, the pivoting member can be pivotally mounted on the base body and can pivot relative to the base body toward the direction of unfolding the curtain body or toward the direction of rolling up the curtain body;

[0008] A self-locking mechanism is arranged on the seat body and is used to lock the pivoting member when the pivoting member pivots toward the rolling curtain body and reaches or exceeds a predetermined pivoting speed.

[0009] Preferably, the seat body is provided with a receiving cavity with an open top, the self-locking mechanism is arranged in the receiving cavity, and the bottom of the pivoting member can be pivotally mounted on the receiving cavity and close the top opening of the receiving cavity.

[0010] Preferably, the self-locking mechanism includes a first ratchet groove, a first pawl, and a first elastic member disposed in the accommodation cavity;

[0011] The first pawl is pivotally mounted on the bottom wall of the pivot member corresponding to the position of the first ratchet groove, and the first pawl can swing relative to the pivot member between a position engaged with the first ratchet groove and a position away from it;

[0012] One end of the first elastic member is fixed, and the other end is connected to the free end of the first pawl. When the pivot member pivots towards the direction of winding the curtain body to reach or exceed a predetermined pivoting speed, the centrifugal force generated exceeds the load of the first elastic member, causing the first pawl to swing to engage with the first ratchet groove to limit the pivoting of the pivot member towards the direction of winding the curtain body. At the same time, it forces a part of the first elastic member to deform and remain deformed, and generates an elastic force for applying a swing force to the first pawl in the direction away from the ratchet groove.

[0013] Preferably, a pair of the first pawls are pivotally mounted on the bottom wall of the pivot member.

[0014] Preferably, an avoidance groove is provided at the position between the two ends of the first pawl, and a clamping seat is provided on the bottom wall of the pivot member corresponding to the avoidance groove. One end of the first elastic member is connected to the clamping seat, and the other end is connected to the free end of the first pawl.

[0015] Preferably, a pressing portion is further provided on the bottom wall of the pivot member corresponding to the avoidance groove. The clamping seat is L-shaped, and two sides of the first elastic member are in contact with the clamping seat and the pressing portion respectively to fix the first elastic member.

[0016] Preferably, a clamping slot is provided at the free end of the first pawl for the end portion of the first elastic member to be movably inserted.

[0017] Preferably, the first elastic member is a strip-shaped sheet structure.

[0018] The present utility model further provides a telescopic door barrier, which includes a lock head, a rotating cylinder provided with a torsion spring therein, and a curtain body connected to one end of the rotating cylinder. The telescopic door barrier further includes a self-locking base. The self-locking base is the above-mentioned self-locking one. The rotating cylinder is pivotally mounted between the lock head and the self-locking base and can drive the pivot member to perform a pivoting action synchronously. The torsion spring can be compressed and store energy as the rotating cylinder pivots towards the direction of unfolding the curtain body, and can be decompressed as the rotating cylinder pivots towards the direction of winding the curtain body, and can release the stored energy when decompressed to make the pivoting speed of the pivot member reach or exceed the predetermined pivoting speed.

[0019] Preferably, a first ratchet wheel and a swing member are pivotally provided at the bottom of the seat body. The first ratchet wheel is connected to one end of a torsion spring and can pivot relative to the seat body in the direction of compressing the torsion spring or in the direction of releasing the compression of the torsion spring. The swing member is pivotally mounted at the bottom of the seat body and can swing between a position in cooperation with the first ratchet wheel and a position away from it. When the swing member cooperates with the first ratchet wheel, it can limit the first ratchet wheel from pivoting in the direction of releasing the elastic force of the torsion spring. Additionally, a first top spring is provided to apply an elastic force to the swing member in the direction of swinging towards cooperation with the first ratchet wheel. When the first ratchet wheel pivots in the direction of compressing the torsion spring, it can overcome the elastic force applied by the first top spring and force the swing member to swing away from the first ratchet wheel.

[0020] Preferably, an adjustment hole is provided on one side of the first ratchet wheel away from the pivot member.

[0021] Preferably, the swing member is further provided with a driving arm, and the swing member can be driven to swing away from the first ratchet wheel through the driving arm.

[0022] Preferably, an installation space for accommodating the first ratchet wheel, the swing member, and the first top spring is provided at the bottom of the seat body. The first ratchet wheel is formed with a frustum having the adjustment hole, and a cover plate is installed on the seat body to enclose the installation space. The cover plate is open at positions corresponding to the frustum and the driving arm.

[0023] Preferably, a positioning member is fixed at a position inside the rotating cylinder corresponding to above the pivot member. The positioning member is pivotally sleeved with a kit, and the kit is fixedly connected to the rotating cylinder. The two ends of the torsion spring are respectively fixedly connected to the positioning member and the pivot member.

[0024] Preferably, the seat body is provided with a positioning rod that can be inserted into the rotating cylinder. One end of the positioning rod on the seat body is fixed with the positioning member, and the end of the positioning rod away from the positioning member is fixedly connected to the first ratchet wheel.

[0025] Preferably, a vertical rod is further provided. The upper end of the vertical rod is connected to the lock head, the lower end of the vertical rod is connected to the self-locking base, the vertical rod is movably sleeved with a sliding seat, and a first plug board for fixedly connecting to a position to be installed is detachably inserted at the back of the sliding seat.

[0026] Preferably, the lock head includes a housing, a connecting head pivotally mounted at the bottom, and a locking mechanism for locking the connecting head. The connecting head is fixedly connected to the upper end of the rotating cylinder. The locking mechanism includes a knob pivotally mounted on the housing, a second ratchet wheel fixedly connected to the connecting head, a second pawl pivotally mounted on the housing, and a second top spring. The second pawl can swing relative to the housing between a position in cooperation with the second ratchet wheel to lock the second ratchet wheel and a position away from it. The second top spring is used to apply an elastic force to the second pawl in the direction of swinging towards cooperation with the second ratchet wheel. The knob is provided with a driving portion, and the driving portion can swing between a position away from the second pawl and a position forcing the second pawl away from the second ratchet wheel as the knob pivots.

[0027] Preferably, a second plug board for fixedly connecting with the position to be installed is detachably plugged on the back of the lock head. A moving block is movably installed on the lock head. The moving block can move relative to the lock head between a position far from the second plug board and a position where the moving block is plugged into the second plug board to limit the second plug board from detaching from the lock head. A third top spring is further provided, and the third top spring is used to apply an elastic force to the moving block in the direction of moving towards the second plug board for plugging.

[0028] Preferably, a fixing structure is further provided. The fixing structure includes a snap ring connected to the free end of the curtain body and a hook fixedly connected to the position to be installed. After the curtain body is unfolded, the free end of the curtain body can be fixed through the hooking cooperation between the snap ring and the hook.

[0029] In the technical solution of the present utility model, a pivot member fixedly connected to the rotating cylinder is pivotally arranged on the seat body of the self-locking base, and a self-locking mechanism is arranged on the self-locking base. When the pivot member pivots towards the direction of winding the curtain body to reach or exceed a predetermined speed, the pivot member is locked by the self-locking base. Compared with the traditional one, the present utility model adds a self-locking function on the basis of the existing technology. When the rotating cylinder pivots towards the direction of winding the curtain body, the torsion spring is released from compression to release elastic force, so that the rotating cylinder and the pivot member reach or exceed the predetermined speed, triggering the self-locking mechanism to lock the pivot member, thereby aborting the automatic winding of the curtain body. Pivoting towards the direction of unfolding the curtain body can cancel the aborting, effectively avoiding the situation that the curtain body swings and hits a person during the automatic winding process, causing injury to the person, or the curtain body collides with hard objects or sharp objects during the swinging process, resulting in damage to the curtain body. Description of the Drawings

[0030] Figure 1 Is a perspective view of the self-locking base;

[0031] Figure 2 Is the first schematic diagram of the first embodiment of the self-locking mechanism;

[0032] Figure 3 Is the second schematic diagram of the first embodiment of the self-locking mechanism;

[0033] Figure 4 Is the first schematic diagram of the second embodiment of the self-locking mechanism;

[0034] Figure 5 Is the second schematic diagram of the second embodiment of the self-locking mechanism;

[0035] Figure 6 Is the third schematic diagram of the second embodiment of the self-locking mechanism;

[0036] Figure 7 Is the first schematic diagram of the third embodiment of the self-locking mechanism;

[0037] Figure 8 Is the second schematic diagram of the third embodiment of the self-locking mechanism;

[0038] Figure 9 It is an assembly drawing of the first ratchet wheel and the swing member;

[0039] Figure 10 It is a three-dimensional view of the retractable door bar;

[0040] Figure 11 It is a sectional view of the retractable door bar;

[0041] Figure 12 It is a partial exploded view of the lock head. Specific embodiments

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0043] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0044] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, then the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0045] The present invention provides a self-locking base.

[0046] In the embodiments of the present invention, as Figures 1 to 12 shown, the self-locking base includes a base body 11, a pivoting member 12, and a self-locking mechanism.

[0047] Wherein, the pivot member 12 is pivotally mounted on the seat body 11 and can pivot relative to the seat body 11 in the direction of unfolding the curtain body or in the direction of retracting the curtain body; the self-locking mechanism is arranged on the seat body 11 and is used for locking the pivot member 12 when the pivot member 12 pivots in the direction of retracting the curtain body to reach or exceed a predetermined pivoting speed.

[0048] Specifically, the seat body is provided with a receiving cavity with an open top, the self-locking mechanism is arranged in the receiving cavity, and the bottom of the pivot member 12 is pivotally mounted in the receiving cavity and closes the top opening of the receiving cavity.

[0049] Specifically, the receiving cavity is circular, and the bottom of the pivot member 12 is provided with a circular plate 13 adapted to the shape of the receiving cavity.

[0050] Specifically, regarding the self-locking mechanism, in the present utility model, three embodiments are provided. In the first embodiment, as Figure 2 and Figure 3 shown, the self-locking mechanism includes a first ratchet groove 101, a first pawl 102 and a first elastic member 103 arranged in the receiving cavity;

[0051] The first pawl 102 is pivotally mounted on the bottom wall of the pivot member 12 corresponding to the position of the first ratchet groove 101, and the first pawl 102 can swing relative to the pivot member 12 between a position where it cooperates with the first ratchet groove 101 and a position away from it;

[0052] One end of the first elastic member 103 is fixed, and the other end is connected to the free end of the first pawl 102. When the pivot member 12 pivots in the direction of retracting the curtain body to reach or exceed a predetermined pivoting speed, the centrifugal force generated exceeds the load of the first elastic member 103, causing the first pawl 102 to swing to cooperate with the first ratchet groove 101 to limit the pivot member 12 from pivoting in the direction of retracting the curtain body. At the same time, it forces a part of the first elastic member 103 to deform and remain deformed and generates an elastic force for applying a swing force to the first pawl 102 in the direction away from the ratchet wheel groove.

[0053] When the pivot member 12 slowly and uniformly pivots in the direction of retracting the curtain body, no centrifugal force is generated or a relatively small centrifugal force is generated, which is not enough to exceed the load of the first elastic member 103 and is not enough to cause the first pawl 102 to swing, so that the curtain body can be smoothly retracted.

[0054] When the pivot member 12 pivots in the direction of unfolding the curtain body, the first pawl 102 follows and disengages from the cooperation with the first ratchet groove 101, causing the first elastic member 103 to reset and relieve the deformation. When resetting, it releases the elastic force and forces the first pawl 102 to swing in the direction away from the first ratchet groove 101 until the elastic force generated by the first elastic member 103 disappears, thereby realizing the reset of the first pawl 102.

[0055] Specifically, a pair of the first pawls 102 can be pivotally mounted on the bottom wall of the pivot member 12 to increase the locking strength.

[0056] An avoidance groove 104 is formed at a position between the two ends of the first pawl 102. A clamping seat 105 is provided at the position of the bottom wall of the pivot member 12 corresponding to the avoidance groove 104. One end of the first elastic member 103 is connected to the clamping seat 105, and the other end is connected to the free end of the first pawl 102.

[0057] Specifically, a pressing portion 106 is further provided at the position of the bottom wall of the pivot member 12 corresponding to the avoidance groove 104. The clamping seat 105 is L-shaped, and two surfaces of the first elastic member 103 are respectively in contact with the clamping seat 105 and the pressing portion 106 to fix the first elastic member 103.

[0058] Specifically, a clamping slot into which the end of the first elastic member 103 can be movably inserted is provided at the free end of the first pawl 102.

[0059] Specifically, the first elastic member 103 is a strip-shaped sheet structure. It is preferably made of metal.

[0060] Specifically, a first annular member with the first ratchet groove 101 is further provided. The first annular member is locked by screws or fixed in the receiving cavity through a snap structure. Alternatively, a plurality of first limiting strips for inserting into the first annular member are annularly and spacedly provided in the receiving cavity to prevent the first annular member from pivoting relative to the receiving cavity, resulting in the failure of the cooperation between the first pawl 102.

[0061] Specifically, the first annular member is a sheet, preferably made of metal.

[0062] In the second embodiment, as Figures 4 to 6 shown, the self-locking mechanism includes a second ratchet groove 201, a moving piece 202, and a driving ring 203 with a partially open structure provided in the receiving cavity;

[0063] The driving ring 203 is provided on the bottom wall of the pivot member 12 and is coaxial with the pivot member 12;

[0064] A plurality of teeth 204 for cooperating with the second ratchet groove 201 are formed on the outer edge of the moving piece 202. The moving piece 202 is movably disposed in the second ratchet groove 201 and can move between positions where the teeth 204 cooperate with and are away from the second ratchet groove 201. The moving piece 202 is further provided with a groove into which the driving ring 203 can extend. An arc-shaped portion 205 that can pass through the opening of the driving ring 203 is provided in the groove. Two ends of the arc-shaped portion 205 are respectively in cooperation with the inner wall of the groove to form a first clamping position 206 and a second clamping position 207;

[0065] As shown Figure 4 in FIG.

[0065] , when the pivot member 12 pivots in the direction of unfolding the curtain body, one end of the two ends of the driving ring 203 can be driven to enter the first clamping position 206 and keep in contact with each other, so as to drive the moving piece 202 to move in the direction of withdrawing from the second ratchet groove 201 of the locking teeth 204, and cooperate with the partial outer wall of the driving ring 203 to be in contact with the partial groove, so that the moving piece 202 can pivot in the direction of unfolding the curtain body together with the pivot member 12 when the locking teeth 204 are not engaged with the second ratchet groove 201;

[0066] As shown Figure 5 in FIG. , when the pivot member 12 pivots slowly and uniformly in the direction of retracting the curtain body, the other end of the two ends of the driving ring 203 can be driven to move to contact with the arc portion 205 and make the partial outer wall of the driving ring 203 contact with the partial groove, so that the moving piece 202 can pivot in the direction of retracting the curtain body together with the pivot member 12 when the locking teeth 204 are not engaged with the second ratchet groove 201;

[0067] As shown Figure 6 in FIG. Figure 5 , when the pivot member 12 pivots in the direction of retracting the curtain body and reaches or exceeds the predetermined pivot speed, the centrifugal force generated forces the moving piece 202 to move in the direction of passing through the opening of the driving ring 203 by the arc portion 205, and the locking teeth 204 move with the movement of the moving piece 202 to be engaged with the second ratchet groove 201, thereby stopping the pivot of the pivot member 12.

[0068] Specifically, the moving piece 202 is oval-shaped. It is preferably made of metal.

[0069] Specifically, there is also a second ring-shaped member having the second ratchet groove 201. The second ring-shaped member is fixed in the receiving cavity by screw locking or by a snap structure. Alternatively, a plurality of second limiting strips for inserting into the second ring-shaped member are annularly and spaced in the receiving cavity, so as to fix the second ring-shaped member in the receiving cavity through the insertion fit of the plurality of second limiting strips and the second ring-shaped member.

[0070] Specifically, the second ring-shaped member is a sheet body. It is preferably made of metal.

[0071] In the third embodiment, as shown Figure 7 in FIGS. Figure 7 Figure 8 and Figure 8 , the self-locking mechanism includes a plurality of clamping grooves 301 annularly and spaced in the receiving cavity, a counterweight 302, a claw 303, and a second elastic member 304;

[0072] The counterweight 302 is pivotally mounted in the receiving cavity and is coaxial with the pivot member 12;

[0073] The jaw 303 can be pivotally mounted at a position on the bottom wall of the pivot member 12 corresponding to one side of the counterweight 302, and can swing relative to the pivot member 12 between a position where it cooperates with the card slot 301 to limit the pivotal movement of the pivot member 12 in the direction of winding up the curtain body and a position where it abuts against one end of the counterweight 302. The pivot member 12 is further provided with a pushing portion 305 for abutting against the other end of the counterweight 302;

[0074] The second elastic member 304 is used to apply an elastic force to the jaw 303 in the direction of moving towards the counterweight 302;

[0075] As Figure 7 shown, when the pivot member 12 pivots in the direction of deploying the curtain body, the counterweight 302 is pushed by the pushing portion 305 to pivot synchronously (the jaw 303 can move away from the counterweight 302 as the pivot member 12 pivots, so the jaw 303 and the counterweight 302 remain relatively stationary);

[0076] As Figure 7 shown, when the pivot member 12 pivots slowly and uniformly in the direction of winding up the curtain body, the jaw 303 can push the counterweight 302 to pivot synchronously without exceeding the load of the second elastic member 304;

[0077] As Figure 8 shown, when the pivot member 12 pivots in the direction of winding up the curtain body and reaches or exceeds a predetermined pivot speed, the centrifugal force generated exceeds the load of the second elastic member 304, making it insufficient for the jaw 303 to push the counterweight 302 to pivot synchronously. Instead, due to the blockage of the counterweight 302, the jaw 303 swings to cooperate with the card slot 301, thereby aborting the pivotal movement of the pivot member 12.

[0078] Specifically, the second elastic member 304 is a strip-shaped sheet structure. The middle of the second elastic member 304 abuts against the outer wall of the jaw 303, and both ends are respectively connected to the free end of the jaw 303 and the side of the pushing portion 305 away from the counterweight 302.

[0079] Specifically, a connection groove 306 with a pin portion 307 is formed at the free end of the jaw 303. One end of the second elastic member 304 extends into the connection groove 306 and is sleeved on the pin portion 307 to realize the connection with the free end of the jaw 303, and the other end of the second elastic member 304 remains in abutment with the pushing portion 305.

[0080] Specifically, a plurality of ratchet teeth are formed at intervals in a ring shape in the accommodating cavity, and the interval space between two adjacent ratchet teeth is the card slot 301.

[0081] Specifically, the pivot member 12 is further formed with a limiting block 308. The claw 303 can swing relative to the pivot member 12 between positions in contact with and away from the limiting block 308, so as to prevent the claw 303 from swinging excessively through the limiting block 308.

[0082] The present utility model further provides a telescopic door barrier, which includes a lock head, a rotating cylinder provided with a torsion spring inside, and a curtain body connected to one end of the rotating cylinder. The telescopic door barrier further includes the above-mentioned self-locking base. For other specific contents of the self-locking base, reference can be made to the above embodiments. Since this telescopic door barrier adopts all the technical solutions of all the above embodiments of the self-locking base, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0083] The rotating cylinder can be pivotally installed between the lock head and the self-locking base and can drive the pivot member 12 to perform a pivoting action synchronously. The torsion spring can be compressed and store energy as the rotating cylinder pivots in the direction of unfolding the curtain body, and can be decompressed as the rotating cylinder pivots in the direction of retracting the curtain body, and can release the stored force when decompressed to make the pivoting speed of the pivot member 12 reach or exceed the predetermined pivoting speed, so as to cooperate with the self-locking mechanism to lock the pivot member 12 and the rotating cylinder, thereby aborting the retraction of the curtain body.

[0084] Specifically, a first ratchet wheel 21 and a swinging member 22 are pivotally provided at the bottom of the seat body 11. The first ratchet wheel is connected to one end of the torsion spring and can pivot relative to the seat body 11 in the direction of compressing the torsion spring or in the direction of releasing the compression of the torsion spring. The swinging member 22 can be pivotally installed at the bottom of the seat body 11 and can swing between positions in cooperation with and away from the first ratchet wheel. When the swinging member 22 cooperates with the first ratchet wheel, it can limit the first ratchet wheel from pivoting in the direction of releasing the elastic force of the torsion spring. In addition, a first top spring 23 is provided to apply an elastic force to the swinging member 22 in the direction of swinging in cooperation with the first ratchet wheel. When the first ratchet wheel pivots in the direction of compressing the torsion spring, it can overcome the elastic force applied by the first top spring 23 and force the swinging member 22 to swing away from the first ratchet wheel.

[0085] Specifically, an adjustment hole 24 is formed on one side of the first ratchet wheel away from the pivot member 12. A tool can be inserted into the adjustment hole 24 to drive the first ratchet wheel to pivot in the direction of compressing the torsion spring, thereby adjusting the compression degree of the torsion spring.

[0086] Specifically, the swinging member 22 is further provided with a driving arm 25, and the swinging member 22 can be driven to swing away from the first ratchet wheel through the driving arm 25.

[0087] Specifically, an installation space for accommodating the first ratchet wheel, the swinging member 22 and the first top spring 23 is formed at the bottom of the seat body 11. The first ratchet wheel is formed with a frustum 26 having the adjustment hole 24, and a cover plate 27 is installed on the seat body 11 to close the installation space. The cover plate 27 is open at positions corresponding to the frustum 26 and the driving arm 25.

[0088] The compression degree of the torsion spring can be reduced by directly driving the first ratchet wheel to pivot in the direction of releasing the compression of the torsion spring through the adjustment hole 24 .

[0089] When the compression degree of the torsion spring needs to be increased, the driving arm 25 is first moved through the open position of the cover plate 27 to drive the swing member 22 away from the first ratchet, and then a tool is inserted into the adjustment hole 24 to drive the first ratchet to pivot in the direction of compressing the torsion spring.

[0090] Specifically, a positioning member 31 is fixed inside the rotating drum at a position corresponding to the position above the pivot member 12. The positioning member 31 is pivotably sleeved with a sleeve 32. The sleeve 32 is fixedly connected to the rotating drum. Both ends of the torsion spring are fixedly connected to the positioning member and the pivot member 12 respectively.

[0091] Specifically, the seat body 11 is provided with a positioning rod 33 which can be inserted into the rotating drum, one end of the seat body 11 of the positioning rod 33 is fixed with the positioning member 31 , and one end of the positioning rod 33 away from the positioning member 31 is fixedly connected to the first ratchet.

[0092] Specifically, a vertical rod 34 is provided, the upper end of which is connected to the lock head, the lower end of which is connected to the self-locking base, and a slide seat 35 is provided on the movable sleeve of the vertical rod 34. The back of the slide seat 35 is detachably plugged with a first plug plate for fixed connection to the installation position.

[0093] It should be noted that the locations to be installed described here are mainly walls.

[0094] Specifically, the lock head includes a shell 41, a connecting head 42 pivotally mounted on the bottom, and a locking mechanism for locking the connecting head 42, the connecting head 42 is fixedly connected to the upper end of the drum, the locking mechanism includes a knob 43 pivotally mounted on the shell 41, a second ratchet 44 fixedly connected to the connecting head 42, a second pawl 45 pivotally mounted on the shell 41, and a second top spring 46, the second pawl 45 can swing relative to the shell 41 between a position of cooperating with the second ratchet to lock the second ratchet and a position away from the second ratchet, the second top spring 46 is used to apply an elastic force to the second pawl 45 to swing in a direction of cooperating with the second ratchet, the knob 43 is provided with a driving portion 47, the driving portion 47 can swing between a position away from the second pawl 45 and a position forcing the second pawl 45 to move away from the second ratchet as the knob 43 pivots.

[0095] Specifically, the shell 41 and the knob 43 are limited by a limiting structure to limit the pivoting movement of the knob 43 relative to the shell 41. The knob 43 can move upward relative to the shell 41 to escape the restriction, or move downward to restore the restriction. A tension spring 48 is also provided. The tension spring 48 is used to apply an elastic force to the knob 43 to move in the direction of restoring the restriction. When the second ratchet needs to be released, the knob 43 is first lifted to release the limiting cooperation, and then the knob 43 is turned to unlock the second ratchet. When the knob 43 is pivoted to the position to lock the second ratchet, the tension spring 48 can be used to make the knob 43 automatically move downward to restore the restriction.

[0096] It should be noted that the limiting structure can refer to the prior art, and its specific structure will not be described in detail here.

[0097] Specifically, the back of the lock is detachably connected with a second plug plate 51 for fixed connection with the installation position, and the lock is movably installed with a moving block 52. The moving block 52 can move relative to the lock between a position away from the second plug plate 51 and a position connected with the second plug plate 51 to limit the second plug plate 51 from being separated from the lock. A third top spring 53 is also provided. The third top spring 53 is used to apply an elastic force to the moving block 52 to move in the direction of connection with the second plug plate 51.

[0098] It should be noted that the location to be installed described here is mainly a wall.

[0099] Specifically, a fixing structure is also provided, which includes a clamping ring 61 connected to the free end of the curtain body and a hook 62 fixedly connected to the installation position. After the curtain body is unfolded, the free end of the curtain body can be fixed by hooking the clamping ring 61 and the hook 62.

[0100] The technical solution of the utility model is that a pivot piece fixedly connected to the rotating drum is pivotally arranged on the seat body of the self-locking base, and a self-locking mechanism is arranged on the self-locking base. When the pivot piece pivots in the direction of the rolling curtain body and reaches or exceeds a predetermined speed, the pivot piece is locked by the self-locking base. Compared with the traditional one, the utility model adds a self-locking function on the basis of the prior art. When the rotating drum pivots in the direction of the rolling curtain body, the torsion spring is decompressed and releases the elastic force, so that the rotating drum and the pivot piece reach or exceed the predetermined speed, triggering the self-locking mechanism to lock the pivot piece, thereby suspending the automatic winding of the curtain body, and the suspension can be released by pivoting in the direction of unfolding the curtain body, effectively preventing the curtain body from swinging and hitting the human body and causing injury to the human body during the automatic winding process, or the curtain body collides with hard or sharp objects during the swinging process, causing damage to the curtain body.

[0101] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A self-locking base, characterized in that: include: base(11); A pivoting member (12), wherein the pivoting member (12) can be pivotally mounted on the base (11) and can pivot relative to the base (11) in a direction of unfolding the curtain body or in a direction of rolling up the curtain body; A self-locking mechanism is provided on the seat body (11) and is used to lock the pivoting member (12) when the pivoting member (12) pivots toward the rolling curtain body and reaches or exceeds a predetermined pivoting speed.

2. The self-locking base according to claim 1, characterized in that: The seat body is provided with a receiving cavity with an open top, the self-locking mechanism is arranged in the receiving cavity, and the bottom of the pivoting member (12) can be pivotally mounted on the receiving cavity and close the top opening of the receiving cavity.

3. The self-locking base according to claim 2, characterized in that: The self-locking mechanism comprises a first ratchet groove (101), a first ratchet pawl (102) and a first elastic component (103) arranged in the accommodating cavity; The first pawl (102) can be pivotally mounted on the bottom wall of the pivot member (12) at a position corresponding to the first ratchet groove (101), and the first pawl (102) can swing relative to the pivot member (12) between a position of being in cooperation with the first ratchet groove (101) and a position of being away from the first ratchet groove (101); One end of the first elastic member (103) is fixed, and the other end is connected to the free end of the first pawl (102). When the pivoting member (12) pivots toward the rolling curtain body and reaches or exceeds a predetermined pivoting speed, the centrifugal force generated exceeds the load of the first elastic member (103), causing the first pawl (102) to swing to cooperate with the first ratchet groove (101) to limit the pivoting member (12) from pivoting toward the rolling curtain body, while forcing a part of the first elastic member (103) to undergo and maintain deformation and generate an elastic force for applying a swing to the first pawl (102) in a direction away from the ratchet groove.

4. The self-locking base according to claim 3, characterized in that: A pair of the first pawls (102) are pivotally mounted on the bottom wall of the pivot member (12).

5. The self-locking base according to claim 3, characterized in that: An escape groove (104) is provided between the two ends of the first pawl (102); a clamping seat (105) is provided at a position of the bottom wall of the pivot member (12) corresponding to the escape groove (104); one end of the first elastic member (103) is connected to the clamping seat (105), and the other end is connected to the free end of the first pawl (102).

6. The self-locking base according to claim 5, characterized in that: A pressing portion (106) is also provided at a position of the bottom wall of the pivoting member (12) corresponding to the avoidance groove (104); the clamping seat (105) is L-shaped; two sides of the first elastic component (103) are respectively in contact with the clamping seat (105) and the pressing portion (106) to fix the first elastic component (103).

7. The self-locking base according to claim 5, characterized in that: The free end of the first pawl (102) is provided with a slot into which the end of the first elastic component (103) can be movably inserted.

8. The self-locking base according to claim 3, characterized in that: The first elastic component (103) is a long strip-shaped sheet structure.

9. The self-locking base according to claim 2, characterized in that: The self-locking mechanism comprises a second ratchet groove (201) provided in the accommodating cavity, a moving sheet (202), and a partially open driving ring (203); The driving ring (203) is arranged on the bottom wall of the pivot member (12) and is coaxial with the pivot member (12); The outer edge of the movable sheet (202) is formed with a plurality of latching teeth (204) for cooperating with the second ratchet groove (201); the movable sheet (202) is movably arranged in the second ratchet groove (201) and can move between positions where the latching teeth (204) and the second ratchet groove (201) are engaged and separated; the movable sheet (202) is also provided with a groove into which the drive ring (203) can extend; the groove is provided with an arc-shaped portion (205) which can pass through the opening of the drive ring (203); the two ends of the arc-shaped portion (205) respectively cooperate with the inner wall of the groove to form a first latching position (206) and a second latching position (207); When the pivoting member (12) pivots in the direction of unfolding the curtain body, it can drive one of the two ends of the driving ring (203) to enter the first locking position (206) and keep abutting against each other, so as to drive the moving piece (202) to move in the direction of the locking teeth (204) exiting the second ratchet groove (201), and cooperate with the local outer wall of the driving ring (203) to abut against the part of the groove, so that the moving piece (202) can be pivoted in the direction of unfolding the curtain body together with the pivoting member (12) in the state that the locking teeth (204) are not engaged with the second ratchet groove (201); When the pivoting member (12) slowly and uniformly pivots in the direction of the rolling curtain body, it can drive the other end of the driving ring (203) to move to abut against the arc-shaped portion (205) and make the local outer wall of the driving ring (203) abut against the part of the groove, so that the moving plate (202) can pivot in the direction of the rolling curtain body together with the pivoting member (12) when the latching teeth (204) are not engaged with the second ratchet groove (201); When the pivoting member (12) pivots toward the rolling curtain body and reaches or exceeds a predetermined pivoting speed, the centrifugal force generated forces the moving plate (202) to move in the direction in which the arc portion (205) passes through the opening of the driving ring (203), and the latching tooth (204) moves with the movement of the moving plate (202) to cooperate with the second ratchet groove (201), thereby stopping the pivoting of the pivoting member (12).

10. The self-locking base according to claim 9, characterized in that: The movable sheet (202) is oval in shape.

11. The self-locking base according to claim 2, characterized in that: The self-locking mechanism comprises a plurality of slots (301) annularly spaced apart in the accommodating cavity, a counterweight (302), a claw (303) and a second elastic member (304); The counterweight block (302) can be pivotally mounted in the accommodating cavity and is coaxial with the pivot member (12); The clamping claw (303) can be pivotally mounted on the bottom wall of the pivoting member (12) at a position corresponding to one side of the counterweight (302), and can swing relative to the pivoting member (12) between a position where it cooperates with the clamping groove (301) to limit the pivoting member (12) from pivoting in the direction of the rolling curtain body and a position where it abuts against one end of the counterweight (302). The pivoting member (12) is also provided with a pushing portion (305) for abutting against the other end of the counterweight (302); The second elastic member (304) is used to apply an elastic force to the claw (303) to move in a direction against the counterweight block (302); When the pivoting member (12) pivots in the direction of unfolding the curtain body, the counterweight block (302) is pushed by the pushing portion (305) to pivot synchronously; When the pivoting member (12) slowly and evenly pivots in the direction of the rolling curtain body, the claw (303) can push the counterweight block (302) to pivot synchronously without exceeding the load of the second elastic member (304); When the pivoting member (12) pivots toward the rolling curtain body and reaches or exceeds a predetermined pivoting speed, the centrifugal force generated exceeds the load of the second elastic member (304), so that the claw (303) is insufficient to push the counterweight block (302) to pivot synchronously. Instead, due to the obstruction of the counterweight block (302), the claw (303) swings to cooperate with the clamping groove (301), thereby stopping the pivoting of the pivoting member (12).

12. The self-locking base according to claim 11, characterized in that: The second elastic member (304) is a long strip-shaped sheet structure, the middle part of the second elastic member (304) is against the outer wall of the claw (303), and the two ends are respectively connected to the free end of the claw (303) and the side of the push part (305) away from the counterweight (302).

13. The self-locking base according to claim 11, characterized in that: The accommodating cavity is formed with a plurality of ratchet teeth at intervals in an annular shape, and the interval space between two adjacent ratchet teeth is the clamping groove (301).

14. A telescopic door barrier, comprising a lock, a rotating drum with a torsion spring therein, and a curtain body connected to the rotating drum at one end, characterized in that: It also includes a self-locking base as described in any one of claims 1 to 13, the rotating drum can be pivotally installed between the locking head and the self-locking base and can drive the pivot member (12) to pivot synchronously, the torsion spring can be compressed and store force as the rotating drum pivots in the direction of unfolding the curtain body, and can be released from compression as the rotating drum pivots in the direction of rolling up the curtain body, and the stored force can be released when the compression is released so that the pivot speed of the pivot member (12) reaches or exceeds the predetermined pivot speed.

15. The telescopic gate according to claim 14, characterized in that: The bottom of the seat body (11) is pivotally provided with a first ratchet (21) and a swinging member (22). The first ratchet is connected to one end of the torsion spring and can be pivoted relative to the seat body (11) in a direction of compressing the torsion spring, or in a direction of releasing the compression of the torsion spring. The swinging member (22) is pivotally mounted on the bottom of the seat body (11) and can swing between a position of cooperating with the first ratchet and a position away from the first ratchet. When the swinging member (22) cooperates with the first ratchet, the first ratchet can be restricted from pivoting in a direction of releasing the elastic force of the torsion spring. A first top spring (23) is further provided for applying an elastic force to the swinging member (22) to swing in a direction of cooperating with the first ratchet. When the first ratchet pivots in a direction of compressing the torsion spring, the elastic force applied by the first top spring (23) can be overcome to force the swinging member (22) to swing in a direction away from the first ratchet.

16. The telescopic gate according to claim 15, characterized in that: An adjustment hole (24) is provided on a side of the first ratchet wheel away from the pivoting member (12).

17. The telescopic gate according to claim 16, characterized in that: The swing member (22) is also provided with a driving arm (25), and the driving arm (25) can be used to drive the swing member (22) to swing in a direction away from the first ratchet wheel.

18. The telescopic gate according to claim 17, characterized in that: The bottom of the seat body (11) is provided with an installation space for accommodating the first ratchet, the swinging member (22) and the first top spring (23); the first ratchet is formed with a round table (26) having the adjustment hole (24); a cover plate (27) is installed on the seat body (11) and closes the installation space; the cover plate (27) is open at a position corresponding to the round table (26) and the driving arm (25).

19. The telescopic gate according to claim 15, characterized in that: A positioning member (31) is fixed inside the rotating drum at a position corresponding to the position above the pivot member (12); the positioning member (31) is pivotably sleeved with a sleeve (32); the sleeve (32) is fixedly connected to the rotating drum; and two ends of the torsion spring are respectively fixedly connected to the positioning member (31) and the pivot member (12).

20. The telescopic gate according to claim 19, characterized in that: The seat body (11) is provided with a positioning rod (33) which can be inserted into the rotating drum, one end of the positioning rod (33) seat body (11) is fixed with the positioning piece (31), and one end of the positioning rod (33) away from the positioning piece (31) is fixedly connected to the first ratchet.

21. The telescopic gate according to claim 14, characterized in that: A vertical rod (34) is also provided, the upper end of the vertical rod (34) is connected to the lock head, the lower end of the vertical rod (34) is connected to the self-locking base, and the vertical rod (34) is movably sleeved with a sliding seat (35), and the back of the sliding seat (35) is detachably plugged with a first plug plate for fixed connection to the installation position.

22. The telescopic gate according to claim 14, characterized in that: The lock head comprises a housing (41), a connecting head (42) pivotally mounted on the bottom, and a locking mechanism for locking the connecting head (42); the connecting head (42) is fixedly connected to the upper end of the rotating drum; the locking mechanism comprises a knob (43) pivotally mounted on the housing (41), a second ratchet (44) fixedly connected to the connecting head (42), a second pawl (45) pivotally mounted on the housing (41), and a second top spring (46); the second pawl (45) can swing relative to the housing (41) between a position of cooperating with the second ratchet to lock the second ratchet and a position away from the housing (41); the second top spring (46) is used to apply an elastic force to the second pawl (45) to swing in a direction of cooperating with the second ratchet; the knob (43) is provided with a driving portion (47); the driving portion (47) can swing between a position away from the second pawl (45) and a position of forcing the second pawl (45) away from the second ratchet as the knob (43) pivots.

23. The telescopic gate according to claim 14, characterized in that: The back of the lock head is detachably plugged with a second plug plate (51) for fixed connection with a position to be installed, and the lock head is movably mounted with a moving block (52). The moving block (52) can move relative to the lock head between a position away from the second plug plate (51) and a position plugged with the second plug plate (51) to limit the second plug plate (51) from being separated from the lock head. A third top spring (53) is also provided. The third top spring (53) is used to apply an elastic force to the moving block (52) to move in the direction of plugging with the second plug plate (51).

24. The telescopic gate according to claim 14, characterized in that: A fixing structure is also provided, the fixing structure comprising a clamping ring (61) connected to the free end of the curtain body and a hook (62) fixedly connected to the position to be installed. After the curtain body is unfolded, the free end of the curtain body can be fixed by hooking the clamping ring (61) and the hook (62).

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