Head lock structure of safety helmet

Abstract

The utility model relates to a helmet head lock structure in the technical field of head locks, which comprises a knob adjusting component, a left bridle and a right bridle, the knob adjusting component comprises an adjusting knob, a transmission part and a support, two ends of the support are respectively provided with a channel for accommodating the left bridle and the right bridle, and the transmission part is mounted in the support. A first annular tooth part and a second annular tooth part are arranged at the two ends of the transmission part respectively, the first annular tooth part is matched with the rack in an embedded mode, the adjusting knob is installed in the middle of the support in a telescopic mode, and a third annular tooth part used for being matched with the second annular tooth part is arranged in the adjusting knob. According to the safety helmet, the telescopic adjusting knob is adopted, so that when the safety helmet is used, the left bridle and the right bridle can be loosened by pulling the adjusting knob outwards, the rotating action is omitted, a user can conveniently and rapidly unfasten the safety helmet in an emergency, it is guaranteed that the safety helmet can be rapidly responded in the emergency, and rapid disassembly of the helmet is achieved; and the wearing comfort and safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of head locks, and particularly to a head lock structure for a safety helmet. Background Art

[0002] When performing relatively intense or physical-contact sports, such as ice skating, roller skating, cycling, or sports like baseball and hockey, once a collision occurs, it is often easy to cause physical injuries, especially the impact of head injuries is the most serious. Therefore, generally when performing relatively intense or physical-contact sports, most people will wear a safety protection helmet to reduce the impact force.

[0003] The structure of the head lock of a traditional safety helmet can be understood from a safety helmet head lock disclosed in the utility model of Chinese Patent Application No. CN204245261U. Existing safety helmets generally use a forward and reverse rotation button to achieve the tightening and loosening adjustment of the head lock of the helmet. However, in actual application, it is not convenient to reverse the button to loosen the head lock. Therefore, the utility model proposes a head lock structure for a safety helmet that is convenient for quick disassembly. Summary of the Invention

[0004] The utility model provides a head lock structure for a safety helmet to solve the problems mentioned in the above background art.

[0005] The purpose of the utility model is achieved in the following way:

[0006] The head lock structure for a safety helmet includes a knob adjustment component, and a left strap and a right strap respectively arranged at both ends of the knob adjustment component. One end of each of the left strap and the right strap is provided with a rack for cooperating with the knob adjustment component. The knob adjustment component includes an adjustment knob, a transmission member, and a bracket. Both ends of the bracket are respectively provided with channels for accommodating the left strap and the right strap. The transmission member is rotatably installed inside the bracket. Both ends of the transmission member are respectively provided with a first annular tooth portion and a second annular tooth portion. The first annular tooth portion is engaged and cooperated with the rack. The adjustment knob is telescopically installed in the middle of the bracket, and a third annular tooth portion for cooperating with the second annular tooth portion is arranged inside the adjustment knob.

[0007] Further, a fixing member is installed on one side of the bracket, and a cavity for the adjustment knob to telescopically move is formed between the bracket and the fixing member.

[0008] Further, the fixing member is fixedly connected to the bracket through a buckle.

[0009] Further, a return spring is arranged between the adjustment knob and the fixing member.

[0010] Further, a fourth annular tooth portion is integrally formed on the bracket, a gear member rotatable along the fourth annular tooth portion is installed between the adjusting knob and the bracket, the adjusting knob is provided with a clamping position for cooperating with the gear member, so that the gear member can be driven to rotate by the adjusting knob, and the gear member is provided with a tooth position for cooperating with the fourth annular tooth portion.

[0011] Further, the tooth position is integrally formed on the gear member through a cantilever, and the cantilever is spaced from the gear member.

[0012] Further, the second annular tooth portion, the third annular tooth portion and the fourth annular tooth portion are all made of ratchet teeth.

[0013] Further, the bracket is composed of a main body and a mesh belt, and the mesh belt is clamped on the main body through an integrally formed fixing portion.

[0014] The present utility model adopts a telescopic adjusting knob, so that when in use, by pulling the adjusting knob outwards, the left strap and the right strap can be loosened, thereby omitting the rotation action, facilitating the user to quickly untie the safety helmet in an emergency, ensuring a quick response in an emergency, realizing the quick disassembly of the helmet, and improving the wearing experience and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the safety helmet head lock structure of the present utility model;

[0016] Figure 2 is a first exploded view of the safety helmet head lock structure of the present utility model;

[0017] Figure 3 is a schematic diagram of the use of the transmission member in the present utility model;

[0018] Figure 4 is a first partial cross-sectional view of the safety helmet head lock structure of the present utility model;

[0019] Figure 5 is a second partial cross-sectional view of the safety helmet head lock structure of the present utility model;

[0020] Figure 6 is a second exploded view of the safety helmet head lock structure of the present utility model;

[0021] Figure 7 is a schematic structural diagram of the gear member in the present utility model;

[0022] The reference numerals in the figures are respectively: 1 - left strap, 2 - right strap, 3 - rack, 4 - adjustment knob, 401 - third annular tooth portion, 5 - transmission member, 501 - first annular tooth portion, 502 - second annular tooth portion, 6 - bracket, 6A - main body, 61A - fourth annular tooth portion, 6B - mesh belt, 61B - fixing portion, 7 - fixing member, 8 - gear position member, 801 - tooth position, 802 - cantilever, 9 - return spring. Detailed implementation mode

[0023] The following further describes the present utility model in detail in conjunction with the drawings and the specific implementation mode.

[0024] In this embodiment, referring to Figure 1 - Figure 7 The head lock structure of the safety helmet implemented specifically includes a knob adjustment assembly and a left strap 1 and a right strap 2 respectively arranged at both ends of the knob adjustment assembly. One ends of the left strap 1 and the right strap 2 are both provided with a rack 3 for cooperating with the knob adjustment assembly. The knob adjustment assembly includes an adjustment knob 4, a transmission member 5 and a bracket 6. Both ends of the bracket 6 are respectively provided with channels for accommodating the left strap 1 and the right strap 2. The transmission member 5 is rotatably installed in the bracket 6. The two ends of the transmission member 5 are respectively provided with a first annular tooth portion 501 and a second annular tooth portion 502. The first annular tooth portion 501 is in engagement and cooperation with the rack 3. The adjustment knob 4 is telescopically installed in the middle of the bracket 6. A third annular tooth portion 401 for cooperating with the second annular tooth portion 502 is arranged inside the adjustment knob 4.

[0025] When the head lock structure of this embodiment is actually applied, the head circumference of the safety helmet can be reduced and tightened by rotating the adjustment knob 4 clockwise. When it is necessary to unlock the safety helmet, pull the adjustment knob 4 outwards so that the third annular tooth portion 401 of the adjustment knob 4 can be disengaged from the second annular tooth portion 502 of the transmission member 5, allowing the transmission member 5 to rotate freely. Through the force of pulling outwards, the left strap 1 and the right strap 2 can be sent out of the channel, expanding the head circumference of the safety helmet. Thus, through a simple action of pulling outwards, the rapid disassembly of the safety helmet is realized, ensuring the wearing safety.

[0026] Furthermore, a fixing member 7 is installed on one side of the bracket 6. A cavity for the telescopic movement of the adjustment knob 4 is formed between the bracket 6 and the fixing member 7. The fixing member 7 is fixedly connected to the bracket 6 through an integrally formed buckle. The assembly method using the buckle can reduce the assembly difficulty and improve the maintenance efficiency.

[0027] Furthermore, a return spring 9 is arranged between the adjustment knob 4 and the fixing member 7. The function of the return spring 9 is to press the adjustment knob 4 to prevent the left strap 1 and the right strap 2 from loosening during use. After the adjustment knob 4 is pulled out to complete the unlocking action, the return spring 9 can also push it back to its original position.

[0028] Furthermore, the bracket 6 is integrally formed with a fourth annular tooth portion 61A. A gear member 8 that can rotate along the fourth annular tooth portion 61A is installed between the adjusting knob 4 and the bracket 6. The adjusting knob 4 is provided with a clamping position for cooperating with the gear member 8, so that the gear member 8 can be driven to rotate by the adjusting knob 4. The gear member 8 is provided with a tooth position 801 for cooperating with the fourth annular tooth portion 61A. When the adjusting knob 4 is rotated clockwise, the left strap 1 and the right strap 2 will be driven by the transmission member 5 to move into the channel, reducing the head circumference of the safety helmet, thereby adapting to different head shapes. Moreover, the adjusting knob 4 will synchronously drive the gear member 8 to rotate through the clamping position. During this process, the tooth position 801 on the gear member 8 will sequentially cooperate with the teeth of the fourth annular tooth portion 61A, thereby realizing quantitative adjustment of the head circumference of the safety helmet, meeting the needs of different users for adjusting the tightness of the safety helmet, and improving the comfort and safety of wearing. And the fourth annular tooth portion 61A is composed of ratchet teeth, which can effectively prevent the gear member 8 from rotating in the reverse direction, facilitating improving the stability of adjustment.

[0029] As Figure 7 shown, the tooth position 801 is integrally formed on the gear member 8 through a cantilever 802. The cantilever 802 is spaced from the gear member 8. When the gear member 8 rotates clockwise, the structure of the cantilever 802 can endow the tooth position 801 with a certain elasticity, facilitating the tooth position 801 to disengage from the teeth of the fourth annular tooth portion 61A and reducing the wear of the ratchet teeth.

[0030] Furthermore, the second annular tooth portion 502, the third annular tooth portion 401, and the fourth annular tooth portion 61A are all composed of ratchet teeth. The function of the ratchet teeth is to prevent the adjusting knob 4 from rotating in the reverse direction.

[0031] Furthermore, the bracket 6 is composed of a main body 6A and a mesh belt 6B combined. The mesh belt 6B is clamped on one side of the main body 6A through an integrally formed fixing portion 61B. The mesh belt 6B can improve the wrapping of the human head, increasing the stability and comfort of wearing the safety helmet.

[0032] The present utility model adopts a telescopic adjusting knob 4, so that during use, by pulling out the adjusting knob 4 outward, the left strap 1 and the right strap 2 can be loosened, thereby omitting the rotation action, facilitating the user to quickly untie the safety helmet in an emergency situation, ensuring a quick response in an emergency situation, realizing the quick disassembly of the safety helmet, and improving the comfort and safety of wearing.

[0033] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model is disclosed above in the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art, without departing from the scope of the technical solution of the present utility model, when making some changes or modifications using the above-disclosed technical content to equivalent embodiments of equivalent changes, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. Safety helmet head lock structure, including a knob adjustment component and a left strap (1) and a right strap (2) respectively arranged at both ends of the knob adjustment component. One end of each of the left strap (1) and the right strap (2) is provided with a rack (3) for cooperating with the knob adjustment component, and it is characterized in that: The knob adjustment assembly includes an adjustment knob (4), a transmission member (5) and a bracket (6). Both ends of the bracket (6) are respectively provided with channels for accommodating the left strap (1) and the right strap (2). The transmission member (5) is rotatably installed in the bracket (6). The two ends of the transmission member (5) are respectively provided with a first annular tooth portion (501) and a second annular tooth portion (502). The first annular tooth portion (501) is engaged with the rack (3). The adjustment knob (4) is telescopically installed in the middle of the bracket (6). A third annular tooth portion (401) for cooperating with the second annular tooth portion (502) is provided in the adjustment knob (4).

2. The safety helmet head lock structure according to claim 1, wherein: A fixing member (7) is installed on one side of the bracket (6). A cavity for the adjustment knob (4) to telescopically move is formed between the bracket (6) and the fixing member (7).

3. The safety helmet head lock structure according to claim 2, wherein: The fixing member (7) is fixedly connected to the bracket (6) by a buckle.

4. The safety helmet head lock structure according to claim 2 or 3, wherein: A return spring (9) is provided between the adjustment knob (4) and the fixing member (7).

5. The safety helmet head lock structure according to claim 1, wherein: The bracket (6) is integrally formed with a fourth annular tooth portion (61A). A gear position member (8) that can rotate along the fourth annular tooth portion (61A) is installed between the adjustment knob (4) and the bracket (6). The adjustment knob (4) is provided with a clamping position for cooperating with the gear position member (8) so that the gear position member (8) can be driven to rotate by the adjustment knob (4). The gear position member (8) is provided with a tooth position (801) for cooperating with the fourth annular tooth portion (61A).

6. The safety helmet head lock structure according to claim 5, characterized in that: The tooth position (801) is integrally formed on the gear position member (8) through a cantilever (802). The cantilever (802) is spaced from the gear position member (8).

7. The safety helmet head lock structure according to claim 6, characterized in that: The second annular tooth portion (502), the third annular tooth portion (401) and the fourth annular tooth portion (61A) all adopt ratchet teeth.

8. The safety helmet head lock structure according to claim 1, wherein: The bracket (6) is composed of a main body (6A) and a mesh belt (6B). The mesh belt (6B) is clamped on the main body (6A) through an integrally formed fixing portion (61B).

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