Safety helmet with adjustable helmet belt

Abstract

The utility model relates to a safety helmet with an adjustable helmet strap, which belongs to the technical field of safety helmets and comprises a safety helmet main body and a helmet strap main body, a locking component for adjusting the helmet strap main body is mounted at the bottom of the safety helmet main body, and a chin support component is mounted on the outer side of the helmet strap main body. The locking assembly comprises two placement shells fixed to the bottom of the safety helmet body, a winding rod rotationally connected to the inner sides of the placement shells through bearings, a fixing shell fixed to the front faces of the placement shells, a worm gear arranged on the outer side of the winding rod in a sleeving mode, and a worm rotationally connected to the inner side of the fixing shell through a bearing. The knob is fixedly mounted at the end part of the worm; the two ends of the hat belt body are wound around the outer sides of the two winding rods correspondingly, and the two rotary knobs are distributed in a bilateral symmetry mode. According to the safety helmet with the adjustable helmet strap, the helmet strap can be conveniently adjusted, and the chin support can be conveniently and easily moved to the bottom of the chin, so that the safety helmet can meet the wearing requirements of different users on different head lengths.

Description

Technical Field

[0001] The present application relates to the technical field of safety helmets, and in particular to a safety helmet with an adjustable chin strap. Background Art

[0002] A safety helmet is a hat that protects the human head from injuries caused by falling objects and other specific factors. When wearing a safety helmet, the head and the helmet need to be tied and positioned with a chin strap so that the helmet can be worn stably on the user's head.

[0003] According to a safety helmet strap that can be easily adjusted and locked disclosed in Chinese patent publication number CN219845214U, the patent provides a rotating block, a rotating shaft, a strap body, a bolt, a mounting hole and a mounting block. When the hand is placed on the rotating block and rotated, the rotating shaft also rotates. While the rotating shaft rotates, the strap body can be reeled or unreeled, and the length of the strap body can be adjusted. The position of the mounting block can be fixed by the bolts and the mounting hole. At this time, the position of the rotating block is fixed, and the purpose of adjustment and locking can be achieved.

[0004] However, during the actual adjustment process of the chin strap, it is necessary to connect the bolts and the mounting holes to achieve positioning, which is very inconvenient during operation. Moreover, when manually adjusting it, it is difficult to ensure that the position of the chin rest is in the middle part, resulting in the need for repeated adjustments to make the chin rest located at the bottom of the chin. The operation is not very convenient. In this regard, the present application provides a safety helmet with an adjustable chin strap to solve the above problems. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the present application provides a safety helmet with an adjustable chin strap, which has the advantages of being able to easily adjust the chin strap and easily move the chin rest to the bottom of the chin, thereby solving the shortcoming that the chin strap of the existing safety helmet is inconvenient to position through simple operations during the adjustment process.

[0006] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a safety helmet with an adjustable chin strap, comprising a safety helmet body and a chin strap body, wherein a locking assembly for adjusting the chin strap body is installed at the bottom of the safety helmet body, and a chin rest assembly is installed on the outer side of the chin strap body;

[0007] The locking assembly includes two placement shells fixed to the bottom of the safety helmet body, a winding rod rotatably connected to the inner side of the placement shell through a bearing, a fixed shell fixed to the front of the placement shell, a worm gear sleeved on the outer side of the winding rod, a worm rotatably connected to the inner side of the fixed shell through a bearing, and a knob fixedly installed on the end of the worm; the two ends of the hat strap body are respectively wrapped around the outer sides of the two winding rods, and the two knobs are symmetrically distributed on the left and right.

[0008] By adopting the above technical solution, the hat strap can be easily adjusted and the chin rest can be easily moved to the bottom of the chin.

[0009] The chin support assembly includes two sliding rings slidably connected to the outside of the hat strap body, a chin support plate fixed between the tops of the two sliding rings, a positioning box fixed to the bottom of the chin support plate, an anti-sliding block fixed to the top wall of the positioning box, two telescopic rods fixedly installed on the bottom wall of the positioning box, a pressure plate fixed between the tops of the two telescopic rods, a trapezoidal fixed block fixed to the bottom of the pressure plate, a sliding hole opened at the bottom of the positioning box, a trapezoidal sliding block slidably connected to the inside of the sliding hole, a limiting piece fixedly installed on the left side wall of the sliding hole, a limiting groove opened on the left side of the trapezoidal sliding block, a sliding plate fixed to the bottom of the trapezoidal sliding block, a push block fixed to the bottom of the sliding plate, two limiting sliding blocks respectively fixed to the front and back sides of the trapezoidal sliding block, and two limiting sliding cavities opened in the positioning box and connected to the inside of the sliding hole.

[0010] By adopting the above technical solution, the chin support plate can be easily moved and positioned.

[0011] Furthermore, the top of the chin support is arc-shaped, and a soft pad is bonded to the top of the chin support. The left and right sides of the positioning box are provided with through holes for the chin strap body to pass through, and the chin strap body is located between the anti-sliding block and the opposite side of the pressure plate.

[0012] By adopting the above technical solution, the user can wear the hat band comfortably, so that the hat band body can be squeezed and limited between the pressure plate and the opposite side of the anti-sliding block.

[0013] Furthermore, the telescopic rod is composed of a sleeve and a sleeve rod slidably connected to the inner side of the sleeve. The opposite sides of the trapezoidal sliding block and the trapezoidal fixed block are both inclined surfaces, and the two fit together.

[0014] By adopting the above technical solution, the pressing plate can move up and down smoothly under the action of the cooperative sliding limit between the two telescopic rods, and the trapezoidal sliding block can push the trapezoidal fixed block to move during the movement.

[0015] Furthermore, the limiting member includes a square plate, two plastic plates and two arc blocks; the two arc blocks are respectively fixed to the opposite sides of the two plastic plates, and the left side of the plastic plate and the right side of the square plate are fixedly connected.

[0016] By adopting the above technical solution, the two plastic plates can undergo appropriate elastic deformation and position offset.

[0017] Further, the limiting groove can be used for inserting two plastic plates and two arc-shaped blocks at the same time, and two limiting sliding cavities are respectively used for sliding two limiting sliding blocks.

[0018] By adopting the above technical scheme, the arc-shaped block can normally enter the inside of the limiting groove, and then the arc-shaped block and the inside of the limiting groove are clamped under the elastic recovery of the plastic plate, thereby achieving the limiting effect, so that the trapezoidal sliding block can normally slide under the cooperation between the two limiting sliding blocks and the limiting sliding cavities.

[0019] Further, the bottom of the placing shell is provided with a movable hole for the cap band body to penetrate, the front end of the winding rod penetrates the front surface of the corresponding placing shell and is rotationally connected through a bearing and the inner front side wall of the corresponding fixed shell, and the worm gear is located in the inside of the corresponding fixed shell.

[0020] By adopting the above technical scheme, the cap band body can normally extend or retract, and the worm gear and the winding rod can normally and stably rotate.

[0021] Further, the outside of the worm gear and the outside of the corresponding worm gear are mutually engaged, and the output shaft of the knob penetrates the outside of the corresponding fixed shell and is fixedly connected with the end portion of the corresponding worm gear.

[0022] By adopting the above technical scheme, the knob can normally drive the corresponding worm gear to rotate, and then the worm gear drives the corresponding worm gear to rotate.

[0023] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0024] The adjustable safety cap can conveniently adjust the cap band and easily move the chin support to the bottom of the chin, so that the entire safety cap can be conveniently worn, can meet the wearing needs of different users with different head lengths, and can also conveniently move the chin support while simply abutting and limiting it, so that it can be kept at a fixed position for the operator's chin to be placed, thereby improving the overall comfort and effectively improving the practicality of the safety cap. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of the present application;

[0026] Figure 2 is a structure of the present application Figure 1 is a top view of the placing shell connection structure in the present application;

[0027] Figure 3 is a structure of the present application Figure 1 is a sectional view of the positioning box connection structure in the present application;

[0028] Figure 4 For the structure of the present application Figure 3 A partial enlarged view of the A part in the structure of the present application;

[0029] Figure 5 For the structure of the present application Figure 4 A perspective view of the trapezoidal sliding block connecting structure in the structure of the present application.

[0030] In the figure: 1, safety helmet main body; 200, locking assembly; 201, placing shell; 202, winding rod; 203, fixed shell; 204, worm gear; 205, worm; 206, knob; 3, hat band main body; 400, chin rest assembly; 401, sliding ring; 402, chin rest plate; 403, positioning box; 404, anti-skid block; 405, telescopic rod; 406, pressing plate; 407, trapezoidal fixed block; 408, sliding hole; 409, trapezoidal sliding block; 410, limiting piece; 411, limiting groove; 412, sliding plate; 413, push block; 414, limiting sliding block; 415, limiting sliding cavity. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0032] Please refer to Figures 1 to 5 The present application provides a technical solution: a safety helmet with adjustable hat band, comprising a safety helmet main body 1 and a hat band main body 3, the bottom of the safety helmet main body 1 is provided with a locking assembly 200 for adjusting the hat band main body 3, and the outer side of the hat band main body 3 is provided with a chin rest assembly 400; through the cooperation between the locking assembly 200 at the bottom of the safety helmet main body 1, the hat band main body 3 and the chin rest assembly 400, the hat band can be conveniently adjusted, and the chin rest can be easily moved to the bottom of the chin, so that the entire safety helmet can be conveniently worn, which can meet the wearing needs of different users with different head lengths, and the chin rest can be conveniently moved while being simply abutted and limited, so that it can be kept at a fixed position for the operator's chin to be placed, thereby improving the overall comfort and effectively improving the practicality of the safety helmet.

[0033] The locking assembly 200 in the present embodiment is a structure for positioning and locking the hat band main body 3 so that it can be well wrapped around the outer circle of the user's head.

[0034] As Figure 1 and Figure 2As shown, the locking assembly 200 comprises two placing shells 201 fixed at the bottom of the safety cap body 1, two winding rods 202 rotatably connected to the inner side of the placing shells 201 through bearings, two fixed shells 203 fixed at the front of the placing shells 201, two worm gears 204 sleeved outside the winding rods 202, two worm rods 205 rotatably connected to the inner side of the fixed shells 203 through bearings, and two knobs 206 fixedly installed at the end of the worm rods 205. The two ends of the cap band body 3 are wound outside the two winding rods 202, and the two knobs 206 are symmetrically distributed left and right.

[0035] It should be noted that the bottom of the placing shell 201 is provided with a movable hole for the cap band body 3 to pass through, so that the cap band body 3 can normally extend or retract. The front end of the winding rod 202 penetrates the front of the corresponding placing shell 201 and is rotatably connected through a bearing and the inner front side wall of the corresponding fixed shell 203. The worm gear 204 is located in the inside of the corresponding fixed shell 203, so that the worm gear 204 and the winding rod 202 can normally and stably rotate.

[0036] In addition, the outer side of the worm rod 205 and the outer side of the corresponding worm gear 204 are meshed with each other, the output shaft of the knob 206 penetrates the outer side of the corresponding fixed shell 203 and is fixedly connected with the end of the corresponding worm rod 205, so that the knob 206 can normally drive the corresponding worm rod 205 to rotate, and then the worm rod 205 drives the corresponding worm gear 204 to rotate. Specifically, the two knobs 206 are located on the opposite sides of the two fixed shells 203, so that after wearing, the knob 206 can be located outside the face, facilitating the user to adjust.

[0037] The chin support assembly 400 in the embodiment is a structure for easily adjusting and positioning the position of the chin support.

[0038] As Figure 3 , Figure 4 and Figure 5As shown, the chin support assembly 400 comprises two sliding rings 401 slidably connected to the outer side of the hat band body 3, a chin support plate 402 fixed between the top of the two sliding rings 401, a positioning box 403 fixed to the bottom of the chin support plate 402, an anti-skid block 404 fixed to the inner top wall of the positioning box 403, two telescopic rods 405 fixedly installed in the inner bottom wall of the positioning box 403, a pressing plate 406 fixedly installed between the top ends of the two telescopic rods 405, a trapezoidal fixed block 407 fixed to the bottom of the pressing plate 406, a sliding hole 408 opened in the bottom of the positioning box 403, a trapezoidal sliding block 409 slidably connected to the inner side of the sliding hole 408, a limiting piece 410 fixedly installed in the left side wall of the sliding hole 408, a limiting slot 411 opened in the left side of the trapezoidal sliding block 409, a sliding plate 412 fixed to the bottom of the trapezoidal sliding block 409, a push block 413 fixed to the bottom of the sliding plate 412, two limiting sliding blocks 414 fixed to the front and back of the trapezoidal sliding block 409 respectively, and two limiting sliding cavities 415 opened in the interior of the positioning box 403 and communicating with the interior of the sliding hole 408.

[0039] It should be noted that the top of the chin support plate 402 is arc-shaped, and a soft pad is bonded to the top of the chin support plate 402. Specifically, the soft pad can be a rubber pad, which can allow the user to wear comfortably. The left and right sides of the positioning box 403 are provided with through holes for the hat band body 3 to penetrate. The hat band body 3 is located between the opposite side of the anti-skid block 404 and the pressing plate 406, so that the hat band body 3 can be pressed and limited between the opposite side of the pressing plate 406 and the anti-skid block 404. Specifically, the bottom of the anti-skid block 404 is provided with irregular pattern grooves, which can increase the friction and thus achieve the effect of anti-skid.

[0040] In addition, the telescopic rod 405 is composed of a sleeve and a sleeve rod slidably connected to the inner side of the sleeve, so that the pressing plate 406 can smoothly move up and down under the cooperation of the sliding limiting action of the two telescopic rods 405. Specifically, the inner side of the telescopic rod 405 is also fixed with a limiting structure for limiting the sleeve rod, which can be a limiting block or other blocking limiting structure. The telescopic rod 405 is a prior art, so it will not be described in detail. The opposite side of the trapezoidal sliding block 409 and the trapezoidal fixed block 407 is a slope, and the two are in close contact, so that the trapezoidal sliding block 409 can push the trapezoidal fixed block 407 to move during movement.

[0041] At the same time, the limiting piece 410 comprises a square plate, two plastic plates and two arc-shaped blocks. The two arc-shaped blocks are fixed to the opposite sides of the two plastic plates, and the left side of the plastic plate is fixedly connected to the right side of the square plate, so that the two plastic plates can be elastically deformed and positionally offset appropriately.

[0042] In addition, the limiting groove 411 can be used for the insertion of two plastic plates and two arc-shaped blocks at the same time, and after the two plastic plates drive the two arc-shaped blocks to move, the arc-shaped blocks can normally enter the inside of the limiting groove 411, and then the arc-shaped blocks are clamped with the inside of the limiting groove 411 under the elastic recovery of the plastic plates, thereby achieving the limiting effect. The two limiting sliding cavities 415 are respectively used for the sliding of two limiting sliding blocks 414, so that the trapezoidal sliding block 409 can normally slide under the cooperation between the two limiting sliding blocks 414 and the limiting sliding cavities 415.

[0043] The working principle of the above embodiment is as follows:

[0044] When wearing, the safety helmet body 1 is worn on the head of the user, the hat band body 3 is moved to the outside of the head, the two knobs 206 are rotated, the worm 205 drives the worm wheel 204 to rotate, and then the winding rod 202 winds or releases the hat band body 3, so that the head can be normally located in the inner ring of the hat band body 3, the chin support plate 402 is abutted at the chin, and the tightness is adjusted. Under the action of the two sliding rings 401, the limiting of the chin support plate 402 by the chin allows the chin support plate 402 to slide outside the hat band body 3, so that the chin support plate 402 can be kept at the chin of the user, after the adjustment is completed, the push block 413 is pushed, the trapezoidal sliding block 409 moves to the side close to the limiting piece 410 under the limiting and sliding actions between the limiting sliding block 414 and the corresponding limiting sliding cavity 415, and the positioning of the trapezoidal sliding block 409 is completed through the clamping between the limiting piece 410 and the limiting groove 411, thereby stable wearing can be achieved.

[0045] Compared with the prior art, the adjustable hat band of the safety helmet can be conveniently adjusted by the cooperation between the locking assembly 200 at the bottom of the safety helmet body 1, the hat band body 3 and the chin support assembly 400, and the chin support can be easily moved to the bottom of the chin, so that the entire safety helmet can be conveniently worn, and the wearing requirements of different users with different head lengths can be met. In addition, the chin support can be conveniently moved and simply abutted and limited at the same time, so that it can be kept at a fixed position for the placement of the chin of the operator, thereby improving the overall comfort, effectively improving the practicality of the safety helmet, and solving the problem that the hat band of the existing safety helmet is not convenient to position through simple operation during adjustment.

Claims

1. A safety helmet with an adjustable chin strap, comprising a safety helmet body (1) and a chin strap body (3), characterized in that: A locking assembly (200) for adjusting the chin strap body (3) is installed at the bottom of the helmet body (1), and a chin support assembly (400) is installed on the outside of the chin strap body (3); The locking assembly (200) comprises two placement shells (201) fixed to the bottom of the helmet body (1), a reeling rod (202) rotatably connected to the inner side of the placement shells (201) via a bearing, a fixed shell (203) fixed to the front of the placement shell (201), a worm wheel (204) sleeved on the outer side of the reeling rods (202), a worm (205) rotatably connected to the inner side of the fixed shell (203) via a bearing, and a knob (206) fixedly mounted on the end of the worm (205); the two ends of the hat strap body (3) are respectively wound around the outer sides of the two reeling rods (202), and the two knobs (206) are symmetrically distributed on the left and right.

2. A safety helmet with an adjustable chin strap according to claim 1, characterized in that: The chin support assembly (400) includes two sliding rings (401) slidably connected to the outside of the hat strap body (3), a chin support plate (402) fixed between the tops of the two sliding rings (401), a positioning box (403) fixed to the bottom of the chin support plate (402), an anti-sliding block (404) fixed to the inner top wall of the positioning box (403), two telescopic rods (405) fixedly installed on the inner bottom wall of the positioning box (403), a pressure plate (406) fixed between the tops of the two telescopic rods (405), a trapezoidal fixing block (407) fixed to the bottom of the pressure plate (406), and a positioning block (403) provided at the bottom of the positioning box (403). A sliding hole (408), a trapezoidal sliding block (409) slidably connected to the inner side of the sliding hole (408), a limiting member (410) fixedly mounted on the left side wall of the sliding hole (408), a limiting groove (411) opened on the left side of the trapezoidal sliding block (409), a sliding plate (412) fixed to the bottom of the trapezoidal sliding block (409), a push block (413) fixed to the bottom of the sliding plate (412), two limiting sliding blocks (414) respectively fixed to the front and back sides of the trapezoidal sliding block (409), and two limiting sliding cavities (415) opened inside the positioning box (403) and connected to the inside of the sliding hole (408).

3. A safety helmet with an adjustable chin strap according to claim 2, characterized in that: The top of the chin support plate (402) is arc-shaped, and a soft pad is bonded to the top of the chin support plate (402). The left and right sides of the positioning box (403) are both provided with through holes for the hat strap body (3) to pass through. The hat strap body (3) is located between the anti-sliding block (404) and the opposite side of the pressure plate (406).

4. The safety helmet with adjustable chin strap according to claim 2, characterized in that: The telescopic rod (405) is composed of a sleeve and a sleeve rod slidably connected to the inner side of the sleeve. The opposite sides of the trapezoidal sliding block (409) and the trapezoidal fixed block (407) are both inclined surfaces, and the two fit together.

5. The safety helmet with adjustable chin strap according to claim 2, characterized in that: The limiting member (410) comprises a square plate, two plastic plates, and two arc-shaped blocks; the two arc-shaped blocks are respectively fixed to opposite sides of the two plastic plates, and the left side of the plastic plate is fixedly connected to the right side of the square plate.

6. The safety helmet with adjustable chin strap according to claim 5, characterized in that: The limiting groove (411) allows two plastic plates and two arc-shaped blocks to be plugged in simultaneously, and the two limiting sliding cavities (415) allow two limiting sliding blocks (414) to slide respectively.

7. The safety helmet with an adjustable chin strap according to claim 1, characterized in that: The bottom of the placement shell (201) is provided with a movable hole for the cap band body (3) to pass through, and one front end of the reeling rod (202) passes through the front of the corresponding placement shell (201) and is rotatably connected to the inner front side wall of the corresponding fixed shell (203) through a bearing, and the worm gear (204) is located inside the corresponding fixed shell (203).

8. The safety helmet with an adjustable chin strap according to claim 1, characterized in that: The outer side of the worm (205) and the outer side of the corresponding worm wheel (204) are meshed with each other, and the output shaft of the knob (206) passes through the outer side of the corresponding fixed housing (203) and is fixedly connected to the end of the corresponding worm (205).

Images