Active pre-tightening mechanism and protective door barrier with same

Abstract

The utility model discloses a kind of active pre-tightening mechanism and the protective door bar with it, by operating exposed operating element, it can be directly pre-tightened to internal torsion spring independent of rotary drum, the core problem of modularization door bar field installation is solved, operation is safe and simple, greatly improves installation efficiency and user experience, structure design is flexible, with the double advantages of simplification low cost and high efficiency reliable, strong universality.In addition, the mechanism can be ingeniously integrated with the original locking mechanism of the door bar in space, realize function concentration and structure optimization, and show excellent industrial design practicability.

Description

Technical Field

[0001] This utility model relates to the field of safety protection products technology, and in particular to an active pre-tensioning mechanism and a protective door railing having the same. Background Technology

[0002] Roller shutter security gates are a common home security product that uses a rotating drum to roll up or unroll the curtain to block or open passageways. To ensure automatic curtain retraction, the product typically incorporates a torsion spring as a reset mechanism. This torsion spring is pre-tensioned before leaving the factory to ensure sufficient rebound torque.

[0003] For traditional safety gates, the preload of the torsion springs is completed before leaving the factory. However, with the emergence of detachable, modular roller shutter gates, the products are transported in component form and require on-site assembly. This presents a new technical challenge: how to conveniently and effectively apply the necessary preload to the torsion springs located inside the rotating drum at the final installation location.

[0004] Currently, there is a lack of mature mechanisms specifically designed to solve this problem. If traditional methods are used, it often requires specialized tools and complex operations, which demand a high level of expertise from the installers. Furthermore, these methods are inconvenient to operate, pose safety hazards, and significantly impact the user experience and market promotion of the product.

[0005] Therefore, there is an urgent need in this field for a dedicated mechanism that can facilitate the pre-tensioning of assembled protective gate torsion springs on-site. Utility Model Content

[0006] The main purpose of this utility model is to propose an active pre-tensioning mechanism and a protective gate with the same, aiming to provide a special mechanism that can facilitate the pre-tensioning of the torsion spring of the assembled protective gate on site.

[0007] To achieve the above objectives, this utility model proposes an active pre-tensioning mechanism and a protective gate having the same, comprising:

[0008] An operating element, at least partially exposed outside the roller blind assembly, to form an operating section;

[0009] The operating element is directly or indirectly connected to one end of the torsion spring for transmission.

[0010] By operating the operating part, the operating member can be driven to rotate, thereby applying or releasing preload force to the torsion spring independently of the rotating drum of the roller blind assembly.

[0011] Preferably, the operating element is an adjusting rod, and the lower end of the adjusting rod is directly fixedly connected to the end of the torsion spring.

[0012] Preferably, the upper end wall of the adjusting rod has a groove.

[0013] Preferably, it further includes a first transmission component, wherein one end of the operating member is fixedly connected to one end of the torsion spring through the first transmission component.

[0014] Preferably, it further includes a second transmission component, which is rotatably sleeved outside the first transmission component, and the second transmission component is also connected to the rotating drum of the roller blind assembly.

[0015] This utility model also proposes a protective door railing, including an upper seat, a lower seat, a rotating cylinder, a curtain, a torsion spring that provides a restoring force to the rotating cylinder, and the aforementioned active pre-tensioning mechanism;

[0016] The torsion spring is housed inside the rotating cylinder, and the upper end of the torsion spring is connected to the rotating cylinder;

[0017] The operating member is inserted into the torsion spring, the lower end of the torsion spring is fixedly connected to the lower end of the operating member, and the upper end of the operating member extends to the outside of the upper seat to form the operating part.

[0018] Preferably, the upper seat is further provided with a locking mechanism for locking the rotating drum, the locking mechanism including a ratchet fixedly connected to the upper end of the rotating drum;

[0019] The operating element moves movably through the axis of the ratchet.

[0020] Preferably, the inner wall of the rotating drum is provided with a retaining strip extending along the length of the rotating drum;

[0021] When the active pretensioning mechanism includes a second transmission component, a first locking position is provided on the outer side of the second transmission component, and a portion of the locking bar is engaged in the first locking position.

[0022] Preferably, a connecting seat is fixed to the upper end of the torsion spring, and the upper end of the operating member moves through the connecting seat;

[0023] The outer side of the connector is provided with a second locking position, and a portion of the locking strip is inserted into the second locking position.

[0024] Preferably, the bottom of the ratchet is provided with a insertion position for the upper end of the rotating drum to be inserted, and a third locking position is provided in the insertion position. Part of the locking bar is inserted into the third locking position to realize the transmission connection between the ratchet and the rotating drum.

[0025] This utility model's technical solution allows for independent pre-tensioning of the internal torsion spring via the exposed operating component, solving a core challenge in the on-site installation of modular gates. It offers safe and convenient operation, significantly improving installation efficiency and user experience. The flexible structural design combines simplification and low cost with high efficiency and reliability, making it highly versatile. Furthermore, this mechanism can be cleverly integrated with the existing locking mechanism of the gate, achieving functional centralization and structural optimization, demonstrating excellent industrial design practicality. Attached Figure Description

[0026] Figure 1 This is a partial sectional view of the protective gate.

[0027] Figure 2 An exploded view of the protective gate;

[0028] Figure 3 This is a schematic diagram showing the assembly of the ratchet, adjusting rod, and torsion spring. Detailed Implementation

[0029] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0030] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0032] This utility model proposes an active pre-tensioning mechanism.

[0033] In this embodiment of the utility model, such as Figures 1 to 3 As shown, this embodiment of the active pretensioning mechanism provides an active pretensioning mechanism, the core of which is that it can independently of the rotating drum of the roller shutter assembly to directly perform pretensioning or release operations on the torsion spring that provides the rebound force.

[0034] Specifically, the active pretensioning mechanism includes an operating element 1. A portion of this operating element 1 protrudes outside the roller shutter assembly, typically outside the upper seat 2 of the safety gate, forming an operating section 11 that can be operated by a user or tool. The operating element 1 is internally connected to one end of a torsion spring via a direct or indirect transmission.

[0035] When the torsion spring needs to be preloaded via this mechanism, the user operates the external operating unit 11 to drive the operating component 1 to rotate. Since the operating component 1 is independently driven, its rotation does not cause the large rotating drum and curtain 5 to rotate together, thus enabling efficient and precise application or release of preload on the torsion spring with minimal operating force. This is particularly suitable for scenarios requiring adjustment or maintenance at the final installation location of the product.

[0036] Specifically, as a further refinement, this embodiment provides a preferred solution with the simplest structure: the operating component 1 is a vertically arranged adjusting rod. The lower end of the adjusting rod is directly fixedly connected to the end of the torsion spring. This direct connection method eliminates intermediate transmission components, resulting in a compact structure and high transmission efficiency.

[0037] Specifically, for ease of operation, a groove 12, such as a slotted slot, a Phillips head slot, or an internal hexagonal hole, can be formed in the upper end wall of the adjusting rod, that is, the surface wall of the operating part 11. This groove 12 can be easily used with common tools such as screwdrivers and wrenches to easily rotate the adjusting rod.

[0038] Specifically, this embodiment provides another preferred implementation method, which is suitable for scenarios that require more complex coordination with the internal structure of the rotating drum.

[0039] In this scheme, the active pre-tensioning mechanism also includes a first transmission component 13; the operating component 1 is preferably an adjusting rod, one end of which is fixedly connected to one end of a torsion spring through the first transmission component 13. Specifically, the first transmission component 13 can be a seat, the lower end of the adjusting rod is fixed to the seat, and the end of the torsion spring is also fixed to the seat.

[0040] Furthermore, a second transmission component 14 is also included. The second transmission component 14 is rotatably sleeved on the outside of the first transmission component 13, i.e., the seat. The second transmission component 14 is used for transmission connection with the rotating drum of the roller blind assembly. In this way, the operating member 1 / first transmission component 13 is responsible for driving the torsion spring, while the second transmission component 14 is responsible for connecting the rotating drum. The two can rotate relative to each other, thus perfectly realizing the core function of independent force exerted on the torsion spring by the rotating drum.

[0041] Specifically, this embodiment provides a protective gate product that integrates the above-mentioned active pre-tensioning mechanism.

[0042] The protective gate includes an upper seat 2, a lower seat 3, a rotating cylinder 4, a curtain 5, and a torsion spring 6 that provides restoring force to the rotating cylinder 4. The torsion spring 6 is housed inside the rotating cylinder 4. Its innovation lies in the fact that it is equipped with the aforementioned active pretensioning mechanism.

[0043] The operating element 1 is inserted into the torsion spring 6. The upper end of the torsion spring 6 is connected to the rotating cylinder 4, and its lower end is directly or fixedly connected to the lower end of the operating element 1 through the first transmission component 13. The upper end of the operating element 1 extends upward and passes through the upper seat 2, ultimately forming the operating part 11 on its exterior. In this way, the user can directly adjust the preload of the internal torsion spring 6 from the outside without disassembling the product.

[0044] Specifically, in this embodiment, the internal structure of the upper seat 2 of the protective gate has been optimized and integrated.

[0045] The upper seat 2 is also equipped with a locking mechanism for locking the rotating cylinder 4. This locking mechanism is a conventional knob-type structure, including a ratchet 7 fixedly connected to the upper end of the rotating cylinder 4. It should be noted that the ratchet 7 has the same function as the ratchet 7 in a conventional knob-type locking mechanism, and is also rotatably mounted inside the upper seat 2.

[0046] The ingenious aspect of this invention lies in the fact that the operating component 1 of the active pre-tensioning mechanism movably passes through the axis of the ratchet 7. This means that the adjusting rod and the ratchet 7 are two independent moving parts: rotating the adjusting rod can pre-tension the torsion spring 6 without affecting the ratchet 7 and the rotating drum 4; conversely, the rotation of the ratchet 7 will not drive the adjusting rod. The two are spatially integrated but functionally separate, and do not interfere with each other.

[0047] A preferred connection method is as follows: the bottom of the ratchet 7 has a insertion slot for the upper end of the rotating cylinder 4 to be inserted. A third locking position is provided on the inner wall of this insertion slot. Simultaneously, a locking strip 41 extending along the length of the rotating cylinder 4 is provided on its inner wall. During assembly, the upper end of the rotating cylinder 4 is inserted into the insertion slot of the ratchet 7, and the locking strip 41 inside partially engages with the third locking position, thereby achieving reliable torque transmission between the ratchet 7 and the rotating cylinder 4.

[0048] Specifically, as mentioned above, the inner wall of the rotating drum 4 is provided with one or more axially extending retaining strips 41.

[0049] When the active pre-tensioning mechanism adopts a scheme with a second transmission component 14, a first locking position 100 is provided on the outer side of the second transmission component 14. After assembly, the locking strip 41 on the inner wall of the rotating drum 4 partially engages in this first locking position 100, thereby realizing synchronous rotation between the rotating drum 4 and the second transmission component 14.

[0050] Meanwhile, a connecting seat 61 is fixed to the upper end of the torsion spring 6. The upper end of the operating member 1 moves through this connecting seat 61, and the two can rotate relative to each other. A second locking position 200 is provided on the outer side of the connecting seat 61. The same locking strip 41 or another corresponding locking strip 41 on the inner wall of the rotating drum 4 is also partially locked into this second locking position 200. In this way, when the rotating drum 4 rotates, the connecting seat 61 can be driven through the locking strip 41, thereby driving the upper end of the torsion spring 6 to rotate synchronously, forming a complete power closed loop.

[0051] Specifically, the operating part 11 is integrally formed with the adjusting rod, or the operating part 11 is at least one independent part that is pulsatorically connected to the adjusting rod.

[0052] It should be noted that the rebound force of the torsion spring is insufficient to overcome the maximum static friction between the first and second transmission components and between the operating part and the upper seat. Therefore, after applying a preload to the torsion spring, the rebound force of the torsion spring will not cause the first transmission component to rotate relative to the second transmission component, thereby maintaining the preload of the torsion spring.

[0053] This utility model's technical solution allows for independent pre-tensioning of the internal torsion spring via the exposed operating component, solving a core challenge in the on-site installation of modular gates. It offers safe and convenient operation, significantly improving installation efficiency and user experience. The flexible structural design combines simplification and low cost with high efficiency and reliability, making it highly versatile. Furthermore, this mechanism can be cleverly integrated with the existing locking mechanism of the gate, achieving functional centralization and structural optimization, demonstrating excellent industrial design practicality.

[0054] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An active pre-tensioning mechanism for applying pre-tension force to the torsion spring of a roller blind assembly, characterized in that, include: An operating element (1) is at least partially exposed outside the roller blind assembly to form an operating section (11). The operating element (1) is directly or indirectly connected to one end of the torsion spring; By operating the operating part (11), the operating member (1) can be driven to rotate, thereby applying or releasing preload force to the torsion spring independently of the rotating drum of the roller blind assembly.

2. The active pre-tensioning mechanism as described in claim 1, characterized in that: The operating component (1) is an adjusting rod, the lower end of which is directly fixedly connected to the end of the torsion spring.

3. The active pre-tensioning mechanism as described in claim 2, characterized in that: The upper end wall of the adjusting rod has a groove (12).

4. The active pre-tensioning mechanism as described in claim 1, characterized in that: It also includes a first transmission component (13), one end of the operating component (1) is fixedly connected to one end of the torsion spring through the first transmission component (13).

5. The active pre-tensioning mechanism as described in claim 4, characterized in that: It also includes a second transmission component (14), which is rotatably sleeved outside the first transmission component (13), and the second transmission component (14) is also connected to the rotating drum of the roller blind assembly.

6. A protective gate, characterized in that: It includes an upper seat (2), a lower seat (3), a rotating drum (4), a curtain (5), a torsion spring (6) that provides a restoring force to the rotating drum (4), and an active pretensioning mechanism as described in any one of claims 1 to 5; The torsion spring (6) is housed inside the rotating cylinder (4), and the upper end of the torsion spring (6) is connected to the rotating cylinder (4); The operating member (1) is inserted into the torsion spring (6), the lower end of the torsion spring (6) is fixedly connected to the lower end of the operating member (1), and the upper end of the operating member (1) extends to the outside of the upper seat (2) to form the operating part (11).

7. The protective gate as described in claim 6, characterized in that: The upper seat (2) is also provided with a locking mechanism for locking the rotating drum (4), the locking mechanism including a ratchet (7) fixedly connected to the upper end of the rotating drum (4). The operating element (1) moves through the axis of the ratchet (7).

8. The protective gate as described in claim 7, characterized in that: The inner wall of the rotating cylinder (4) is provided with a retaining strip (41) extending along the length of the rotating cylinder (4). When the active pre-tightening mechanism includes a second transmission component (14), a first locking position (100) is provided on the outer side of the second transmission component (14), and a portion of the locking strip (41) is locked into the first locking position (100).

9. The protective gate as described in claim 8, characterized in that: The upper end of the torsion spring (6) is fixed with a connecting seat (61), and the upper end of the operating member (1) moves through the connecting seat (61). The outer side of the connecting seat (61) is provided with a second locking position (200), and a portion of the locking strip (41) is inserted into the second locking position (200).

10. The protective gate as described in claim 8, characterized in that: The bottom of the ratchet (7) is provided with a slot for the upper end of the rotating drum (4) to be inserted. The slot is provided with a third locking position. The locking bar (41) is partially locked into the third locking position to realize the transmission connection between the ratchet (7) and the rotating drum (4).

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