Fireproof helmet lens locking structure

Abstract

The utility model discloses a fire helmet lens locking structure, including helmet, lens, buckle, fixed base and locking mechanism, and lens rotation is installed on the helmet, and buckle is set up in the front end of lens, and fixed base sets up in the front end of helmet, and the fixed base is equipped with locking mechanism, and locking mechanism includes guide seat, locking piece, pressing piece, inclined pressing plate, spring etc, and is equipped with the positioning hole on the buckle, when lens closes, the lock tongue is under the spring effect and is inserted into the positioning hole and realizes automatic locking, when opening, presses pressing piece, and inclined pressing plate drives locking piece to move and makes the lock tongue to exit, realizes lens to be unlocked. The structure is through the locking mode of multiple point guidance and automatic reset, and the stability and the impact resistance of safety lock make the lens be in the closed state when the helmet collides, protect the face of the rider from being hurt by other objects. The wearing safety and the use convenience of fire helmet in complex environment are improved greatly.

Description

Technical Field

[0001] This utility model belongs to the field of protective equipment technology, specifically relating to a locking structure for fireproof helmet lenses. Background Technology

[0002] Most existing fire helmets are equipped with visors to provide effective facial protection in fires, high temperatures, or other hazardous environments. However, in actual use, problems arise such as the visor automatically opening after a violent impact, failing to adequately protect the wearer's face. On one hand, some visors rely on simple mechanical locking mechanisms for fixation, which are prone to loosening under vibration or impact, causing the visor to detach without tampering, posing a significant safety hazard. On the other hand, some fire helmets neglect ease of operation in their design, making it difficult for wearers wearing gloves or in emergency situations to quickly open or close the visor, thus affecting practical application efficiency.

[0003] Especially during the lens closing process, traditional locking methods lack automatic reset and reliable positioning functions, causing the locking component to fail to be stably inserted into the positioning hole, or to shift and malfunction during wear. Simultaneously, without a smooth unlocking guide structure when opening the lens, jamming can easily occur, affecting emergency response speed. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a fireproof helmet lens locking structure. It can realize a fireproof helmet lens locking structure that is easy to operate and has automatic locking and unlocking guidance functions, so as to solve the problems of unreliable lens locking and unsmooth opening in the prior art, and improve the practicality and safety of helmet lenses in special environments.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A fireproof helmet lens locking structure includes a helmet and a lens, the lens is rotatably mounted on the helmet, the front end of the lens is connected to a fastener, the front end of the helmet is connected to a fixing seat, and the fixing seat is provided with a locking mechanism;

[0007] When the lens is fastened, the locking mechanism will lock the position of the fastener.

[0008] The fastener has a through-hole for positioning;

[0009] The mounting base includes a base plate connected to the helmet, a guide seat fixedly connected to the base plate, and a locking mechanism provided inside the guide seat;

[0010] The locking mechanism includes a pressing member that presses down and a locking member located in the guide seat. The locking member has a spring inside for resetting. When the pressing member is pressed down, the locking member will move in the direction of the axis of the pressing member. When the pressing member is released, the locking member will move away from the axis of the pressing member.

[0011] Furthermore, one end of the fastener is symmetrically provided with connecting holes, which are used to install screws that connect the fastener to the lens;

[0012] The other end of the fastener is fixedly connected to a handle plate, the cross-section of which is L-shaped, and reinforcing plates are symmetrically fixedly connected to the sides of the handle plate.

[0013] Furthermore, the back of the base plate is fixedly connected with two insertion pins. When the base plate is connected to the helmet, the insertion pins are inserted into the corresponding grooves on the helmet.

[0014] Furthermore, a limit ring is connected to the top of the guide seat by screws, and the limit ring is fitted onto the pressing member.

[0015] Furthermore, the guide seat is provided with a first guide groove, the number of which is set to three, and the three first guide grooves are distributed at equal intervals around the central axis of the guide seat;

[0016] The locking element is located within the first guide groove;

[0017] The bottom of the pressing component is fixedly connected to a guide post, and the top of the guide seat is provided with a second guide groove corresponding to the guide post.

[0018] Furthermore, the lower end face of the pressing member is fixedly connected with an inclined pressure plate, the number of inclined pressure plates corresponds to the locking member, the top of the locking member is provided with a guide groove, and the bottom end of the inclined pressure plate is located in the guide groove;

[0019] A locking tongue is provided on the top side of the locking component.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention utilizes the cooperation between a fastening component located at the front of the lens and a locking mechanism located in the front fixing seat of the helmet. This allows the lens to be precisely positioned and securely locked in the closed state through a mechanical structure, effectively solving the problems of unstable lens closure and easy loosening and falling off in existing fire helmets, and improving the protective reliability of the helmet in complex environments such as high temperature and high pressure.

[0022] This utility model is provided with a guide seat, a first guide groove and a locking member, so that the locking member has clear trajectory control during the sliding process. Combined with the meshing method between the locking tongue and the positioning hole, the locking action during the lens closing process has automatic guidance and accurate insertion function, effectively overcoming the problems of locking offset, positioning difficulty and loose locking in traditional structures.

[0023] This invention optimizes the lens opening operation by setting the inclined force transmission relationship between the pressing component, the inclined pressure plate, and the guide groove. This allows the operator to simply press the pressing component to forcefully unlock the locking component, avoiding the jamming and inability to open smoothly caused by the lack of an unlocking guide structure in traditional structures. This improves the response efficiency and convenience of the lens opening operation.

[0024] This invention utilizes a spring to provide a restoring force to the locking component, enabling the locking tongue to automatically return to its initial locking position after the unlocking action is completed. This ensures that the locking action can be automatically completed when the lens recloses, effectively solving the technical problems of the locking structure's inability to automatically reset and its poor stability during repeated use in the prior art. It also enhances the long-term reliability and ease of maintenance of the entire locking structure.

[0025] This invention sets the locking component in the first guide groove and uses a multi-point distributed locking tongue structure to engage with the positioning holes on the lens fastener. In the locked state, it forms a uniformly distributed multi-point support force. Combined with the continuous pre-tension of the spring, the locking tongue is firmly inserted and remains stable during the lens closing process. When the helmet is subjected to severe collision or high-intensity impact, this structure can effectively resist the loosening or displacement of the locking tongue caused by external force, ensuring that the lens and the helmet maintain a tight fit, and significantly improving the safety protection performance of the entire helmet structure in extreme environments. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of the helmet of this utility model;

[0027] Figure 2 This is a schematic diagram of the lens structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the fastening component of this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the fixing base of this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the guide seat of this utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the base plate of this utility model;

[0032] Figure 7 This is a schematic diagram of the locking mechanism of this utility model. Figure 1 ;

[0033] Figure 8 This is a schematic diagram of the locking mechanism of this utility model. Figure 2 ;

[0034] Figure 9 This is a schematic diagram of the locking component of this utility model;

[0035] Figure 10 This is a schematic diagram of the pressing component of this utility model.

[0036] The attached diagram lists the components represented by each number as follows:

[0037] 1. Helmet;

[0038] 2. Lenses;

[0039] 3. Fasteners;

[0040] 31. Connecting hole; 32. Positioning hole; 33. Handle plate; 331. Reinforcing plate;

[0041] 4. Fixing base; 41. Base plate; 411. Insertion post; 42. Guide seat; 421. First guide groove; 422. Second guide groove; 43. Limiting ring;

[0042] 5. Locking mechanism;

[0043] 51. Locking element; 511. Guide groove; 512. Locking tongue;

[0044] 52. Pressing component; 521. Inclined pressure plate; 522. Guide post; 53. Spring. Detailed Implementation

[0045] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0046] See Figure 1-10A fireproof helmet visor locking structure includes a helmet 1 and a visor 2, with the visor 2 rotatably mounted on the helmet 1. A fastening element 3 is connected to the front end of the visor 2. A fixing seat 4 is connected to the front end of the helmet 1. A locking mechanism 5 is provided on the fixing seat 4. The locking mechanism 5 is positioned corresponding to the closing trajectory of the visor 2, and is used to lock the fastening element 3 when the visor 2 is closed, thereby improving the reliability and anti-detachment capability of the visor closure in dangerous environments such as fire and high temperatures. When the visor 2 is fastened, the locking mechanism 5 locks the position of the fastening element 3, ensuring that the visor 2 can stably adhere to the front of the helmet 1, preventing the visor from loosening due to collision or external force. A positioning hole 32 is provided through the fastening element 3, which cooperates with the locking tongue structure in the locking mechanism 5 to achieve precise positioning and mechanical locking, ensuring a stable and reliable locking state. 4 includes a base plate 41 connected to the helmet 1, and a guide seat 42 is fixedly connected to the base plate 41; a locking mechanism 5 is provided inside the guide seat 42; the locking mechanism 5 includes a pressing member 52 that presses down and a locking member 51 located inside the guide seat 42, and a spring 53 for resetting is provided inside the locking member 51; the spring 53 is used to automatically push the locking member 51 back to its original position after the pressing member 52 is released, so as to realize the rapid reset and relocking of the locking tongue structure; when the pressing member 52 is pressed down, the locking member 51 will move in the direction of the axis of the pressing member 52, compressing the elastic force of the spring 53, so that the locking tongue is disengaged from the positioning hole 32, realizing the unlocking function; when the pressing member 52 is released, the locking member 51 will move in the direction away from the axis of the pressing member 52, and re-enter the positioning state under the pushing action of the spring 53, completing the locking of the fastener 3.

[0047] See Figure 1-3 One end of the fastener 3 has symmetrical through-holes 31 for installing screws that connect the fastener 3 to the lens 2. The screw connection ensures the stable installation of the fastener 3 at the end of the lens 2 and prevents loosening during long-term use. The other end of the fastener 3 is fixedly connected to a handle plate 33. The handle plate 33 has an L-shaped cross-section, which is convenient for users to grip and move, improving the ease of operation. The sides of the handle plate 33 are symmetrically fixedly connected to reinforcing plates 331. The reinforcing plates 331 enhance the structural rigidity of the handle plate 33 when opening the lens, preventing deformation or breakage of the handle plate due to uneven force during unlocking.

[0048] See Figure 6 The back of the base plate 41 is fixedly connected with two plug-in pins 411. The outer diameter of each plug-in pin 411 matches the mounting groove on the helmet 1. When the base plate 41 is connected to the helmet 1, the plug-in pin 411 is inserted into the corresponding groove on the helmet 1. The fixing seat 4 can be stably installed on the surface of the helmet 1 through the plug-in method, while avoiding displacement of the fixing seat 4 due to vibration or impact.

[0049] See Figure 4-5 The top of the guide seat 42 is connected to a limit ring 43 by screws. The limit ring 43 is sleeved on the pressing member 52. The limit ring 43 is used to limit the maximum pressing depth of the pressing member 52, so as to avoid the inclined pressure plate 521 from being inserted too deeply due to excessive pressing, which would damage the guide groove or interfere with the normal movement path of the locking member 51, thereby improving the durability and service life of the locking mechanism 5.

[0050] See Figure 5-8 The guide seat 42 has three first guide grooves 421, which are evenly distributed around the central axis of the guide seat 42. The three-point symmetrical arrangement helps to form a balanced locking force in multi-point locking, improving the shock resistance stability of the lens 2 in the locked state. The locking member 51 is located in the first guide groove 421 and can move axially along a set trajectory inside the guide groove to ensure that the locking tongue 512 can be accurately aligned and inserted into the positioning hole 32 on the fastener 3. The bottom of the pressing member 52 is fixedly connected to the guide post 522, which extends vertically downward to provide a guiding and positioning function during the pressing process. The top of the guide seat 42 has a second guide groove 422 corresponding to the guide post 522. The second guide groove 422 guides the movement trajectory of the guide post 522 in the vertical direction, making the pressing action smoother and preventing the structure from jamming.

[0051] See Figure 8-10 A slanted pressure plate 521 is fixedly connected to the lower end face of the pressing member 52. The number of slanted pressure plates 521 corresponds to the number of locking members 51. Each slanted pressure plate 521 is inclined and is used to insert into the guide groove 511 at the top of the locking member 51 when the pressing member 52 moves down. The inclined structure applies an axial thrust to the locking member 51, thereby realizing the disengagement and reset control of the locking tongue 512. A guide groove 511 is provided at the top of the locking member 51, which provides a channel for the insertion force of the slanted pressure plate 521. The bottom end is located in the guide groove 511. After the wedge-shaped structure of the inclined pressure plate 521 is inserted into the guide groove 511, it presses the locking member 51 against one side of the first guide groove 421, so that the locking tongue 512 quickly exits the positioning hole 32. The top side of the locking member 51 is provided with a locking tongue 512, which is used to engage with the positioning hole 32 on the fastener 3 to complete the automatic locking function of the lens 2. When the inclined pressure plate 521 is withdrawn, the locking tongue 512 is pushed back into the positioning hole 32 by the spring 53, thereby realizing the re-locking of the lens.

[0052] The working principle of this utility model is as follows:

[0053] When it is necessary to close the lens 2, press down on the fastening part 3 on the lens 2. When the fastening part 3 contacts the locking part 51 on the locking mechanism 5, it will squeeze the locking tongue 512 on the locking part 51. As the locking tongue 512 is squeezed, the locking part 51 will move in the direction of the pressing part 52 in the first guide groove 421, so that the locking tongue 512 on the locking part 51 passes through the positioning hole 32. When the locking tongue 512 passes through the positioning hole 32, the locking part 51 will automatically reset its position under the elastic force of the spring 53. After the locking part 51 resets, the locking tongue 512 will lock the position of the fastening part 3, so that the lens 2 fits tightly against the helmet 1.

[0054] When it is necessary to open the lens 2, press the pressing member 52 downwards with your hand. As the pressing member 52 moves downwards, the inclined pressure plate 521 at the bottom of the pressing member 52 will be inserted into the guide groove 511. As the inclined pressure plate 521 extends in, the locking member 51 moves in the direction of the pressing member 52. When the locking tongue 512 retracts into the first guide groove 421, the latch plate 33 can be pulled upwards with your hand to separate the fastening member 3 from the locking mechanism 5, thereby realizing the opening operation of the lens 2.

[0055] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A fireproof helmet lens locking structure, comprising a helmet (1) and a lens (2), wherein the lens (2) is rotatably mounted on the helmet (1), characterized in that: The front end of the lens (2) is connected to a fastener (3), and the front end of the helmet (1) is connected to a fixing seat (4), and a locking mechanism (5) is provided on the fixing seat (4); When the lens (2) is fastened, the locking mechanism (5) will lock the position of the fastening part (3); The fastener (3) has a through-hole (32); The fixed seat (4) includes a base plate (41) connected to the helmet (1), a guide seat (42) is fixedly connected to the base plate (41), and a locking mechanism (5) is provided in the guide seat (42); The locking mechanism (5) includes a pressing member (52) for pressing down and a locking member (51) located in the guide seat (42). The locking member (51) is provided with a spring (53) for resetting. When the pressing member (52) is pressed down, the locking member (51) will move in the direction of the axis of the pressing member (52). When the pressing member (52) is released, the locking member (51) will move in the direction away from the axis of the pressing member (52).

2. The fireproof helmet lens locking structure according to claim 1, characterized in that: One end of the fastener (3) is symmetrically provided with a connecting hole (31), which is used to install a screw that connects the fastener (3) to the lens (2); The other end of the fastener (3) is fixedly connected to a handle plate (33), the cross section of the handle plate (33) is set to L-shape, and the side of the handle plate (33) is symmetrically fixedly connected to a reinforcing plate (331).

3. The fireproof helmet lens locking structure according to claim 1, characterized in that: The back of the base plate (41) is fixedly connected with a plug post (411). The number of plug posts (411) is set to two. When the base plate (41) is connected to the helmet (1), the plug post (411) is inserted into the corresponding groove on the helmet (1).

4. The fireproof helmet lens locking structure according to claim 1, characterized in that: The top of the guide seat (42) is connected to a limit ring (43) by screws, and the limit ring (43) is sleeved on the pressing member (52).

5. The fireproof helmet lens locking structure according to claim 4, characterized in that: The guide seat (42) is provided with a first guide groove (421), and the number of the first guide grooves (421) is set to three, and the three first guide grooves (421) are distributed at equal intervals around the central axis of the guide seat (42); The locking element (51) is located in the first guide groove (421); The bottom of the pressing member (52) is fixedly connected to a guide post (522), and the top of the guide seat (42) is provided with a second guide groove (422) corresponding to the guide post (522).

6. The fireproof helmet lens locking structure according to claim 5, characterized in that: The lower end face of the pressing member (52) is fixedly connected with a slanted pressure plate (521). The number of slanted pressure plates (521) corresponds to the number of locking members (51). The top of the locking member (51) is provided with a guide groove (511), and the bottom end of the slanted pressure plate (521) is located in the guide groove (511). A locking tongue (512) is provided on one side of the top of the locking member (51).

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