Helmet lens adjusting and clamping structure

Abstract

The utility model relates to a helmet lens adjusting and clamping structure which comprises a connecting piece, and the connecting piece is provided with at least two first arc-shaped guide grooves and second arc-shaped guide grooves which are distributed in a fan shape. The pair of glasses further comprises a lens, a first buckle and a second buckle are correspondingly arranged at the connecting end of the lens, the first buckle and the second buckle are buckled with the first arc-shaped guide groove and the second arc-shaped guide groove correspondingly and can move in a reciprocating mode along the first arc-shaped guide groove and the second arc-shaped guide groove respectively, and a positioning protruding block is arranged on the lens. The corresponding connecting piece is further provided with arc-shaped positioning teeth, and the positioning protruding blocks are meshed with the arc-shaped positioning teeth. The deflector rod abuts against the second buckle of the lens, the clamping force on the lens is increased through the deflector rod when the lens is opened, and the lens is more stable when being opened.

Description

Technical Field

[0001] The utility model relates to the technical field of helmets, in particular to a helmet lens adjusting and clamping structure. Background Art

[0002] The lenses of helmets are mostly made of transparent materials, which can not only ensure that the wearer has a better field of vision, but also effectively prevent the intrusion of harmful particles such as sand, dust, rain, and smoke, as well as raindrops, from causing harm to the face. The lenses are usually rotatably mounted on the shell. Generally, transparent lenses are provided on the front side of the helmet, and both sides of the rear end of the lens are rotatably connected to the helmet respectively. At present, the fixed seat is fixedly connected to the helmet body through the installation groove, and the lens is rotatably connected to the fixed seat. This opening and closing state is not easy to control, and the lens may sometimes open and sometimes close. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the defects existing in the prior art and provide a helmet lens adjusting and clamping structure.

[0004] To achieve the above purpose, the technical solution of the utility model is to design a helmet lens adjusting and clamping structure, which includes a connecting piece, and at least two first arc-shaped guide grooves and second arc-shaped guide grooves distributed in a fan shape are provided on the connecting piece;

[0005] The structure further includes a lens. First buckles and second buckles are correspondingly provided at the connecting end of the lens. The first buckles and the second buckles are respectively buckled with the corresponding first arc-shaped guide grooves and second arc-shaped guide grooves and can reciprocate along the first arc-shaped guide grooves and the second arc-shaped guide grooves. A positioning convex block is provided on the lens, and an arc-shaped positioning tooth is further provided on the corresponding connecting piece. The positioning convex block meshes with the arc-shaped positioning tooth.

[0006] A further preferred technical solution is that, the structure further includes a fixed seat, the arc-shaped positioning tooth is fixedly arranged on the fixed seat, and the connecting piece is elastically installed on the fixed seat.

[0007] A further preferred technical solution is that, a first slider and a second slider are provided on the fixed seat, a guiding hole slidably matched with the first slider is provided on the connecting piece, and a guiding rib is further provided on one side of the connecting piece and is slidably matched with the second slider.

[0008] A further preferred technical solution is that, a first spring seat is provided on the inner side of the guiding hole close to the end of the lens, a spring connecting column is provided on the corresponding first slider, and a second spring is provided on the spring connecting column and abuts against the first spring seat; a guiding groove is provided on the side of the second slider away from the arc-shaped positioning tooth, and a protruding guiding rib is provided on the corresponding connecting piece and is slidably matched with the guiding groove.

[0009] A further preferred technical solution is that a lever is provided between the fixing seat and the connecting member, one end of the lever is pressed against the second buckle of the lens, and the other end of the lever is elastically abutted against the connecting member.

[0010] A further preferred technical solution is that the connecting member is provided with a receiving groove adapted to the outer contour of the lever, one end of the lever is elastically abutted against the connecting member through a first spring, and the other end is located at an end of the second arc guide groove of the connecting member away from the first spring, and when the lens is in an open state, the end of the lever located in the second arc guide groove elastically abuts against the second buckle.

[0011] A further preferred technical solution is that a first clamping edge is provided at the end of the lever, and a second clamping edge is also provided on the second clamping buckle of the lens to cooperate with the first clamping edge and the second clamping edge is connected through the clamping buckle.

[0012] A further preferred technical solution is that the connecting member is provided with a toggle handle, the outer periphery of the toggle handle has a cam edge, the connecting member is provided with a placement groove to cooperate with the toggle handle, an elastic positioning rib is also provided in the placement groove, and the corresponding toggle handle is provided with a positioning protrusion, and the toggle handle can be rotatably buckled in the placement groove of the connecting member.

[0013] The advantages and beneficial effects of the utility model are as follows: when the lens is in the open state, one end of the lever located in the second arc-shaped guide groove elastically abuts against the second buckle; thus, when the lens is opened, the positioning protrusion of the lens is meshed and positioned with the arc-shaped positioning teeth of the fixing seat, and at the same time, the lever abuts against the second buckle of the lens, and the clamping force of the lens when it is opened is increased by the lever, so that the lens is more stable when it is opened;

[0014] By providing a toggle handle on the mask connector near the guide rib, the guide rib of the mask connector is offset from the second guide seat of the fixing seat, so that the airtightness of the mask can be fine-tuned to increase the air intake. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the axonometric drawing of the utility model;

[0016] Figure 2 This is an axonometric diagram of the connection between the connector and the lens of the utility model;

[0017] Figure 3 This is an axonometric diagram of the elastic connection between the connector and the fixing seat of the utility model;

[0018] Figure 4 This is the axonometric drawing of the lever connection of the utility model;

[0019] Figure 5 This is an isometric view of the toggle handle connecting shaft of the present utility model.

[0020] In the figure: 10, lens; 11, first buckle; 12, second buckle; 13, second card edge; 14, positioning bump; 20, connecting piece; 21, guiding hole; 22, first spring seat; 23, first arc-shaped guiding groove; 24, accommodating groove; 241, first hollow groove; 242, second hollow groove; 25, second arc-shaped guiding groove; 26, second spring seat; 27, guiding rib; 28, placing groove; 29, elastic positioning rib; 30, second spring; 40, lever; 41, first card edge; 50, first spring; 60, toggle handle; 61, cam edge; 62, positioning protrusion; 70, fixed seat; 71, arc-shaped positioning teeth; 72, second slider; 73, first slider; 74, spring connecting column; 75, guiding groove. Specific embodiments

[0021] The following combines the drawings and embodiments to further describe the specific embodiments of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0022] Referring to Figure 1-2 , a helmet lens adjustment and clamping structure includes a connecting piece 20. The lens 10 of the helmet can be movably installed on the connecting piece 20 and can be flipped open or closed relative to the connecting piece 20. The connecting piece 20 is provided with two first arc-shaped guiding grooves 23 and second arc-shaped guiding grooves 25 distributed in a fan shape. Two connecting ends of the lens 10 are respectively provided with a matching first buckle 11 and second buckle 12. The first buckle 11 can be buckled in the first arc-shaped guiding groove 23 and move along the first arc-shaped guiding groove 23. At the same time, the second buckle 12 can be buckled in the second arc-shaped guiding groove 25 and move along the second arc-shaped guiding groove 25. When the first buckle 11 and the second buckle 12 move along the first arc-shaped guiding groove 23 and the second arc-shaped guiding groove 25 respectively, the lens 10 is flipped open or closed relative to the connecting piece 20, and the detachable connection between the lens 10 and the connecting piece 20 can be realized through the cooperation of the first buckle 11, the second buckle 12 and the first arc-shaped guiding groove 23, the second arc-shaped guiding groove 25.

[0023] Referring to Figure 2-3After the lens 10 is moved and installed on the connecting member 20, it can be opened and closed along the first arc guide groove 23 and the second arc guide groove 25, but this opening and closing state is not easy to control, which may cause the lens 10 to be sometimes opened and sometimes closed. In order to achieve that the lens 10 moves to a position along the first arc guide groove 23 and the second arc guide groove 25 and remains in this position, a positioning protrusion 14 is provided at the inner side of the connecting end of the lens 10, and a corresponding arc positioning tooth 71 is provided on the connecting member 20. The positioning protrusion 14 abuts against the arc positioning tooth 71. Under the action of external force, when the lens 10 is moved along the first arc guide groove 23 and the second arc guide groove 25, the positioning protrusion 14 moves across to the adjacent position along the arc positioning tooth 71 and forms a positioning state; thereby, the pop-up angle (opening degree) of the lens 10 relative to the helmet body can be controlled.

[0024] Reference Figure 3 If the arc-shaped positioning tooth 71 and the first arc-shaped guide groove 23 and the second arc-shaped guide groove 25 are simultaneously arranged on the connecting member 20, then when the lens 10 is opened and closed along the first arc-shaped guide groove 23 and the second arc-shaped guide groove 25, the positioning protrusion 14 will rigidly abut the arc-shaped positioning tooth 71. When opened and closed for a long time, one or both of the components will be worn out and fail, thereby reducing the service life. In order to solve this problem, the arc-shaped positioning tooth 71 is arranged on an object that can move relative to the connecting member 10, so that the positioning protrusion 14 on the lens 10 elastically abuts against the arc-shaped positioning tooth 71. In this way, the positioning protrusion 14 moves along the arc-shaped positioning tooth 71 to the adjacent position, and the arc-shaped positioning tooth 71 can be elastically retracted relative to the connecting member 20. For this purpose, a fixing seat 70 is also included, and the arc-shaped positioning tooth 71 is fixedly arranged on the fixing seat 70. The fixing seat 70 is used to be installed on a helmet, and the connecting member 20 is elastically installed on On the fixing seat 70, specifically, the fixing seat 70 is an ear-shaped structure, and a pair of sliders are provided on the fixing seat 70, wherein the first slider 73 is located on the fixing seat 70 corresponding to the end of the lens 10, and the second slider 72 is located on the fixing seat 70 corresponding to the inner side of the end of the lens 10, and the arc-shaped positioning tooth 71 is arranged between the first slider 73 and the second slider 72, and the connecting member 20 is buckled on the fixing seat 70 and elastically moves along the front and rear direction of the helmet. The connecting member 20 is also an ear-shaped structure, and the upper auricle position of the connecting member 20 is provided with two fan-shaped distributed first arc guide grooves 23 and second arc guide grooves 25 as the starting point, and a guide hole 21 slidably matched with the first slider 73 is provided on the connecting member 20 between the first arc guide groove 23 and the second arc guide groove 25, and a guide rib 27 slidably matched with the second slider 72 is also provided on the side of the connecting member 20 corresponding to the second slider 72.

[0025] Reference Figure 3, Further, a first spring seat 22 is provided inside the guiding hole 21 near the end of the lens 10. A spring connecting post 74 is provided on the corresponding first slider 73. A second spring 30 is provided on the spring connecting post 74 and abuts against the first spring seat 22. On the side of the second slider 72 away from the arc-shaped positioning teeth 71, a guiding groove 75 is provided. A protruding guiding rib 27 is provided on the corresponding connecting member 20 and is slidably matched with the guiding groove 75, so that the connecting member 20 is buckled on the first slider 73 through the guiding hole 21 and is buckled on one side of the second slider 72 through the guiding rib 27. The fixing seat 70 and the connecting member 20 can perform relative elastic telescopic movement. The positioning convex block 14 of the lens 10 moves across to the adjacent position along the arc-shaped positioning teeth 71 and forms a positioning state. Thus, the bouncing angle (opening degree) of the lens 10 relative to the helmet body can be adjusted.

[0026] Referring to Figure 4 , in order to keep the lens 10 in a stable state after being opened, a lever 40 is further provided between the fixing seat 70 and the connecting member 20. The lever 40 presses against the second buckle 12 of the lens 10, increasing the clamping force when the lens 10 is opened. Specifically, a receiving groove 24 adapted to the outer contour of the lever 40 is provided on the connecting member 20. One end of the lever 40 is elastically abutted against the connecting member 20 through a first spring 50, and the other end is located at the end of the second arc-shaped guiding groove 25 of the connecting member 20 away from the first spring 50. When the lens 10 is in the opened state, one end of the lever 40 located in the second arc-shaped guiding groove 25 elastically abuts against the second buckle 12. In this way, when the lens 10 is opened, the positioning convex block 14 of the lens 10 meshes and positions with the arc-shaped positioning teeth 71 of the fixing seat 70. At the same time, the lever 40 presses against the second buckle 12 of the lens 10, and the clamping force when the lens 10 is opened is increased through the lever 40, so that the lens 10 maintains a more stable state when opened.

[0027] In order to make the lever 40 stably press against the second buckle 12, further, a first hollow groove 241 is provided on the connecting member 10 corresponding to the end of the lever 40 near the first spring 50. The end of the corresponding lever 40 is a hollow end protruding in the first hollow groove 241. A second hollow groove 242 is provided on the connecting member 20 corresponding to the other end of the lever 40 and is communicated with one side of the second arc-shaped guiding groove 25. A first clamping edge 41 protruding in the second hollow groove 242 and extending into the second arc-shaped guiding groove 25 is provided at the end of the corresponding lever 40. A second clamping edge 13 is also provided on the second buckle 12 of the lens 10 for cooperation. Through the snap connection between the first clamping edge 41 and the second clamping edge 13, the lever forms a stable pressing force on the second buckle 13. The structure of the lever 40 can not only reduce the weight of the lever 40 but also increase the strength of the lever 40, facilitating the transmission of the elastic force by the lever 40.

[0028] Referring to Figure 5 , in order to finely adjust the airtightness of the lens, air intake can be increased. Further, a toggle handle 60 is provided on the connecting member 20. The outer periphery of the toggle handle 60 has a section of cam edge 61. A placement groove 28 is provided on the connecting member 20 to cooperate with the toggle handle 60. The placement groove 28 is provided with a guiding portion adapted to the cam edge 61. An elastic positioning rib 29 is further provided in the placement groove 28. A corresponding positioning protrusion 62 is provided on the toggle handle 60. The toggle handle 60 can be rotatably fastened in the placement groove 28 of the connecting member 20. The elastic positioning rib 29 is an arc rib protruding from the inner peripheral surface of the placement groove 28. The guiding portion is provided on the connecting member 20 at one end of the elastic positioning rib 29 close to the second spring seat 26. The initial position of the toggle handle 60 makes the positioning protrusion 62 located on the side of the elastic positioning rib 29 close to the second spring seat 26. At the same time, the cam edge 61 is located outside the guiding portion. When the toggle handle 60 is toggled, due to the shape limitation of the placement groove 28, the toggle handle 60 can only rotate between the two sides of the elastic positioning rib 29. The positioning protrusion 62 squeezes the elastic positioning rib 29 from one side of the elastic positioning rib 29 to the other side of the elastic positioning rib 29. At the same time, the cam edge 61 is squeezed into the guiding portion and squeezes the guiding rib 27 of the connecting member 20, resulting in deformation of the connecting member 20 at this place, causing the connecting member 20 to be misaligned with the fixed seat 70. In this way, when the lens 10 is closed on the helmet, a gap is formed between the bottom edge of the lens 10 and the helmet, and the airtightness of the lens 10 can be finely adjusted to increase air intake and ventilation.

[0029] An installation groove is provided on the outer side of the ear part of the shell of the helmet. The fixed seat 70 is embedded in the installation groove and is fixedly connected to the helmet by screws passing through the connection holes on the fixed seat 70, meeting the requirements of the compact design. The fixed seat 70 can reliably support the remaining components, and can also completely cover the fixed seat 70 and its accessories at the connection end of the lens 10, making the appearance of the helmet neater and more beautiful.

[0030] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A helmet lens adjustment and clamping structure, characterized in that It comprises a connecting piece, on which at least two first arc-shaped guide grooves and a second arc-shaped guide groove are provided in a fan-shaped distribution; It also includes a lens, and the connecting ends of the lens are correspondingly provided with a first buckle and a second buckle, the first buckle and the second buckle are respectively buckled with the corresponding first arc guide groove and second arc guide groove and can reciprocate along the first arc guide groove and the second arc guide groove, the lens is provided with a positioning protrusion, and the corresponding connecting member is also provided with an arc positioning tooth, and the positioning protrusion is meshed with the arc positioning tooth.

2. The adjustable clamping structure for a helmet lens according to claim 1, wherein, It also includes a fixing seat, the arc-shaped positioning teeth are fixedly arranged on the fixing seat, and the connecting piece is elastically installed on the fixing seat.

3. The adjustable clamping structure for a helmet lens according to claim 2, characterized in that, The fixing seat is provided with a first slider and a second slider, the connecting member is provided with a guide hole which is slidably matched with the first slider, and one side of the connecting member is further provided with a guide rib which is slidably matched with the second slider.

4. The adjustable clamping structure of a helmet lens according to claim 3, wherein A first spring seat is provided on the inner side of the guide hole near the end of the lens, and a spring connecting column is provided on the corresponding first slider, and a second spring is provided on the spring connecting column to abut against the first spring seat; a guide groove is provided on the side of the second slider away from the arc-shaped positioning tooth, and a protruding guide rib is provided on the corresponding connecting piece to slide in cooperation with the guide groove.

5. The adjustable clamping structure for a helmet lens according to claim 2, characterized in that, A lever is further provided between the fixing seat and the connecting member, one end of the lever is pressed against the second buckle of the lens, and the other end of the lever is elastically abutted against the connecting member.

6. The adjustable clamping structure for a helmet lens according to claim 5, characterized in that, The connecting member is provided with a receiving groove adapted to the outer contour of the lever, one end of the lever is elastically abutted against the connecting member through a first spring, and the other end is located at an end of the second arc-shaped guide groove of the connecting member away from the first spring. When the lens is in an open state, the end of the lever located in the second arc-shaped guide groove elastically abuts against the second buckle.

7. The adjustable clamping structure for a helmet lens according to claim 6, characterized in that, The end of the lever is provided with a first clamping edge, and the second clamping buckle of the lens is also provided with a second clamping edge for matching, and the first clamping edge is connected with the second clamping edge through the clamping buckle.

8. The adjustable clamping structure for a helmet lens according to claim 1, wherein, The connecting member is provided with a toggle handle, the outer periphery of which has a cam edge, the connecting member is provided with a placement groove to cooperate with the toggle handle, an elastic positioning rib is also provided in the placement groove, and the corresponding toggle handle is provided with a positioning protrusion, and the toggle handle can be rotatably buckled in the placement groove of the connecting member.

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