Hat hoop applied to safety helmet and safety helmet

Abstract

The invention is suitable for the technical field of safety helmets, and provides a helmet hoop applied to a safety helmet and the safety helmet.The helmet hoop comprises an annular belt, an adjusting belt and an adjusting buckle, and the adjusting belt and the adjusting buckle are connected to the two ends of the annular belt respectively; a plurality of positioning holes are formed in the adjusting belt in the length direction of the adjusting belt; the adjusting buckle comprises a buckle body connected with the ring belt, a positioning column arranged on the surface of the buckle body and two ejection mechanisms distributed on the two sides of the buckle body. A channel which penetrates through the two sides and is used for allowing the adjusting belt to pass through is formed in the buckle body, the positioning column is provided with a guide inclined face used for allowing the adjusting belt to be inserted on the inlet side of the channel, the positioning column is provided with a clamping face matched with the positioning hole and used for being embedded into the positioning hole on the outlet side of the channel, and the ejection mechanism is used for synchronously lifting the adjusting belt to enable the positioning hole to be separated from the positioning column when pressed and stressed. The safety helmet solves the problem that an existing safety helmet is poor in wearing comfort and operation convenience.

Description

Technical Field

[0001] The present invention relates to the technical field of safety helmets, and particularly relates to a headband and a safety helmet applied to a safety helmet. Background Art

[0002] A safety helmet is a protective gear for preventing impact objects from hurting the head, and is widely used in various industries such as construction, metallurgy, mining, electric power, oil factories, chemical industry, transportation, forestry, etc. It is an important equipment for protecting the personal safety of operators. A safety helmet can effectively reduce the impact of falling objects and other external forces on the head, reduce injuries, and ensure the life safety of operators.

[0003] The structure of a safety helmet mainly includes a helmet shell, a helmet liner, etc. Among them, the helmet liner is the part that directly contacts the wearer's head, and mainly plays the roles of buffering, fixing and adjusting. The helmet liner usually includes a top band, a headband, a chin strap, etc. Among them, the headband is an adjustable band that surrounds the head circumference. Its main function is to firmly fix the safety helmet on the wearer's head and prevent the safety helmet from shifting or falling off during use. In order to improve wearing comfort, a sweat-absorbing band is usually added to the headband to absorb the sweat generated by the wearer's head and prevent the sweat from flowing into the eyes and affecting the line of sight.

[0004] At present, the common headband size adjustment methods on the market mostly adopt a gear adjustment structure. This structure realizes the change of the headband circumference by rotating a gear to drive a ratchet or a buckle, so as to adapt to wearers with different head circumferences. Although the gear adjustment structure can achieve relatively precise adjustment and the operation is relatively simple, there are also some obvious defects:

[0005] 1. Weight load problem: The gear adjustment structure needs to additionally install metal or hard plastic components such as a gear plate and a rack, which will significantly increase the overall weight of the safety helmet. For operators who need to wear a safety helmet for a long time, the additional weight will increase the neck burden, reduce the wearing comfort, and may even cause fatigue, affecting work efficiency and safety.

[0006] 2. Inconvenient operation: Since the safety helmet is worn on the head, the position of the headband is in the blind area of the line of sight after wearing, and the wearer cannot directly see the adjustment mechanism of the headband. The adjustment of the gear adjustment structure usually requires one-handed operation to complete the rotation and unlocking of the gear knob. The steps are cumbersome and difficult to accurately control, and it completely relies on touch for "blind disassembly". For wearers who use it for the first time or are not familiar with this structure, the operation is relatively difficult, and it is easy to have misoperations, and may even cause the safety helmet to be worn incorrectly, affecting the protection effect. Especially in an emergency, this blind disassembly operation may delay time and pose a safety hazard.

[0007] 3. Structure and maintenance limitations: The clearance of the gear adjustment assembly is prone to accumulating sweat and dust. Prolonged use may cause the gears to jam and wear, affecting their lifespan. In addition, the frequent contact between the rigid adjustment components and the head may form local pressure points, violating the principles of ergonomic design.

[0008] In summary, although the existing gear adjustment method for the cap hoop can achieve the function of size adjustment, it has obvious deficiencies in terms of weight, operation convenience, and adjustment reliability, affecting the comfort and safety of the wearer. Therefore, it is necessary to develop a new type of cap hoop adjustment structure to solve the above problems existing in the prior art. Summary of the Invention

[0009] Based on this, the purpose of the present invention is to provide a cap hoop and a safety helmet applied to a safety helmet, so as to fundamentally solve the problems of insufficient comfort and operation convenience of existing safety helmets.

[0010] A cap hoop applied to a safety helmet according to an embodiment of the present invention includes a ring band, and an adjustment band and an adjustment buckle respectively connected to both ends of the ring band;

[0011] A plurality of positioning holes are provided on the adjustment band along its length direction;

[0012] The adjustment buckle includes a buckle body connected to the ring band, a positioning post provided on the surface of the buckle body, and two ejecting mechanisms distributed on both sides of the buckle body;

[0013] A channel for the adjustment band to pass through is provided inside the buckle body and penetrates both sides. The positioning post is provided with a guiding inclined surface for the adjustment band to insert at the entrance side of the channel, and a locking surface matching the positioning hole for embedding the positioning hole at the exit side of the channel. The ejecting mechanism is used to synchronously lift the adjustment band when pressed to make the positioning hole disengage from the positioning post.

[0014] In addition, a cap hoop applied to a safety helmet according to the above embodiment of the present invention may further have the following additional technical features:

[0015] Further, the ejecting mechanism includes a pressing part with both ends connected to the buckle body and the middle part capable of deforming along the center of the buckle body under pressure, and a jacking part connected to the inner wall of the middle part of the pressing part and having an upward inclined surface or arc surface;

[0016] The jacking part is used to synchronously contact and lift the edge of the adjustment band through the inclined surface or arc surface when the pressing part deforms under pressure.

[0017] Further, the ejecting mechanism further includes a linkage part respectively connected to the pressing part and the jacking part and forming a sliding fit with the buckle body;

[0018] On one side of the buckle body close to the linkage part, there is a guiding inclined surface for guiding the linkage part to slide towards the center of the buckle body, and the linkage part is provided with a sliding inclined surface that slidably cooperates with the guiding inclined surface of the buckle body;

[0019] The linkage part is used to jack up the inner surface of the adjusting belt by sliding on the guiding inclined surface when the pressing part is deformed by pressing.

[0020] Further, the buckle body includes a first guiding and limiting part connected to the annular belt, a main body part connected to the first guiding and limiting part and bearing the positioning column, and a second guiding and limiting part connected to the main body part;

[0021] The first guiding and limiting part is located on the side of the channel outlet and allows the adjusting belt to pass through, and the second guiding and limiting part is located on the side of the channel inlet and allows the adjusting belt to pass through.

[0022] Further, the first guiding and limiting part includes two first connecting pieces respectively connected to both sides of the buckle body and the ejecting mechanism, and a first limiting piece, a second limiting piece and a third limiting piece that are parallel and are sequentially arranged in a staggered manner from one side of the main body part and are respectively connected to the two first connecting pieces; the second limiting piece is substantially in the same plane as the main body part;

[0023] The second guiding and limiting part includes two second connecting pieces respectively connected to both sides of the buckle body and the ejecting mechanism, and a fourth limiting piece and a fifth limiting piece that are parallel and are sequentially arranged in a staggered manner from one side of the main body part and are respectively connected to the two second connecting pieces; the fifth limiting piece is substantially in the same plane as the main body part.

[0024] Further, the outer edge of the middle part of the pressing part is in an arc shape that bends away from the buckle body.

[0025] Further, the positioning holes and the positioning columns are both evenly distributed, and the distance between two adjacent positioning columns is a multiple of the distance between two adjacent positioning holes.

[0026] Further, the adjusting belt and the adjusting buckle respectively branch out from the opposite ends of the annular belt.

[0027] Further, the annular belt is provided with ventilation holes, anti-collision columns, fixing columns for connecting and fixing the top belt and the chin strap of the safety helmet, and fixing protrusions for connecting and fixing the sweat-absorbing belt of the safety helmet along its length direction.

[0028] Another object of an embodiment of the present invention is also to provide a safety helmet, including a helmet shell, a top belt fixedly connected to the helmet shell, a cap band for a safety helmet as described above fixedly connected to the top belt, and a chin strap and a sweat-absorbing belt fixedly connected to the cap band.

[0029] The cap band applied to a safety helmet provided by an embodiment of the present invention can precisely adjust the perimeter of the cap band by setting the cooperation of an adjustment strap and an adjustment buckle; through the ejection mechanism arranged on the adjustment buckle, the wearer can easily unlock the adjustment strap and adjust the perimeter of the cap band by simply pressing both sides of the adjustment buckle with one hand. Thus, it is more convenient and faster than the traditional gear adjustment (usually requiring two hands to operate); and through the cooperation mode of the positioning posts and positioning holes arranged on the adjustment buckle, the adjustment process is very fast. Just pull the adjustment strap to the appropriate position and release the pressure to fix it. At the same time, by respectively arranging a guiding inclined surface and a locking surface on both sides of the positioning post, the guiding inclined surface can facilitate the insertion of the adjustment strap, and the matching of the locking surface and the positioning hole ensures that the cap band can be firmly fixed after adjustment and will not accidentally loosen during use; and the arranged adjustment buckle part is lighter than the traditional gear adjustment mechanism, which helps to reduce the overall weight of the safety helmet, thereby improving the wearing comfort; at the same time, compared with the traditional gear adjustment mechanism, the designed parts of the adjustment strap and the adjustment buckle are fewer, and the structure is simpler, reducing the risk of failure. It solves the problems of insufficient wearing comfort and operation convenience of the existing safety helmet. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an exploded view of one of the cap bands applied to a safety helmet in the first embodiment of the present invention from the first perspective;

[0031] Figure 2 It is a structural view of another cap band applied to a safety helmet in the first embodiment of the present invention from the second perspective;

[0032] Figure 3 It is a structural view of another cap band applied to a safety helmet in the first embodiment of the present invention from the third perspective;

[0033] Figure 4 It is Figure 1 an enlarged view of part II in the circle;

[0034] Figure 5 It is Figure 2 an enlarged view of part III in the circle;

[0035] Figure 6 It is Figure 3 an enlarged view of part IV in the circle;

[0036] Figure 7 It is an exploded view of the safety helmet in the fourth embodiment of the present invention from the fourth perspective.

[0037] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. SPECIFIC EMBODIMENTS

[0038] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant accompanying drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0039] It should be noted that when an element is referred to as being "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] Embodiment 1

[0042] Please refer to Figures 1 - 6 , which shows the headband applied to a safety helmet in the first embodiment of the present invention. For the convenience of description, only the parts related to the embodiments of the present invention are shown. The headband applied to a safety helmet provided by the embodiments of the present invention includes an annular band 31, and an adjustment band 32 and an adjustment buckle 33 respectively connected to both ends of the annular band 31;

[0043] A plurality of positioning holes 321 are provided on the adjustment band 32 along its length direction;

[0044] The adjustment buckle 33 includes a buckle body 331 connected to the annular band 31, a positioning post 332 provided on the surface of the buckle body 331, and two ejecting mechanisms 333 distributed on both sides of the buckle body 331;

[0045] A channel for the adjustment band 32 to pass through is provided inside the buckle body 331 and penetrates both sides. The positioning post 332 is provided with a guiding inclined surface 3321 for the adjustment band 32 to insert at the entrance side of the channel, and the positioning post 332 is provided with a locking surface 3322 at the exit side of the channel that matches the positioning hole 321 for embedding into the positioning hole 321. The ejecting mechanism 333 is used to synchronously lift the adjustment band 32 when pressed to make the positioning hole 321 disengage from the positioning post 332.

[0046] Among them, in an embodiment of the present invention, the annular band 31 has an open annular structure, that is, it is not a closed circular ring, but an arc-shaped band with an opening. The annular band 31 is made of plastic with a certain elasticity and can adapt to the head circumferences of different users. Specifically, the annular band 31 is usually made of engineering plastics with good elasticity and toughness, such as high-strength polypropylene (PP), modified ABS resin, or polycarbonate (PC), etc. These materials can withstand a certain degree of bending and stretching, and at the same time have good durability and impact resistance. The two ends of the annular band 31 (that is, the two ends of the open annular structure) are respectively connected to the adjustment band 32 and the adjustment buckle 33. One end of the annular band 31 is usually fixedly connected to the adjustment band 32 (for example, permanently fixed by in-mold injection or snap structure). The other end is fixedly connected to the adjustment buckle 33, allowing the adjustment buckle 33 to slide along the length direction of the annular band 31 to achieve the adjustment of the circumference of the cap band. Further, ventilation holes 311, anti-collision columns 312, fixing columns 313 for connecting and fixing the top band and the chin strap of the safety helmet, and fixing protrusions 314 for connecting and fixing the sweatband of the safety helmet are provided along the length direction of the annular band 31. The ventilation holes 311 are used to increase the ventilation and heat dissipation of the annular band 31 and disperse stress. The anti-collision columns 312 are used to disperse the impact force, avoid direct contact between the cap shell and the wearer's head, reduce the impact of the cap shell's force deformation on the top of the wearer's head, and prevent head injuries. The fixing columns 313 are used to cooperate with the fixing holes on the top band and the chin strap of the safety helmet for fixation. Specifically, in this embodiment, the fixing columns 313 are T-shaped columns, and the corresponding fixing holes on the top band and the chin strap are T-shaped holes. The fixing protrusions 314 are used to pass through the fixing through holes of the sweatband to fix the sweatband.

[0047] Further, in an embodiment of the present invention, referring to Figures 1 - 3As shown, the adjustment strap 32 and the adjustment buckle 33 respectively branch out and extend from the opposite ends of the loop strap 31, and the lengths of the branched connection parts between the adjustment strap 32 and the adjustment buckle 33 and the loop strap 31 are both greater than the length of the end point of the loop strap 31. Since the fixing posts 313 provided on the loop strap 31 are connected to the top strap and the chin strap of the safety helmet, providing stable support and bearing impact force, these connection points need to remain relatively stable and cannot move randomly. At this time, if the adjustment buckle 33 and the adjustment strap 32 are directly arranged at the two ends of the loop strap 31, then when adjusting the circumference of the cap band, the connection points of the fixing posts 313 will also move accordingly, resulting in affecting the stress states of the top strap and the chin strap and reducing the protective performance of the safety helmet. In the embodiment of the present invention, by respectively branching out and extending the adjustment strap 32 and the adjustment buckle 33 from the opposite ends of the loop strap 31, the "adjustment functional area" (the adjustment buckle 33 and the adjustment strap 32) and the "connection functional area" (the fixing posts 313 and the fixing holes on the top strap and the chin strap) can be spatially separated from each other, so that they do not interfere with each other and independently complete their functions. At the same time, the design of respectively branching out and extending the adjustment strap 32 and the adjustment buckle 33 from the opposite ends of the loop strap 31 makes the pulling force exerted by the adjustment strap 32 on the loop strap 31 more evenly distributed on a longer arc length of the cap band, rather than concentrated at the end point of the loop strap 31, so that stress concentration can be avoided, and the overall strength and durability of the cap band can be improved. At the same time, the design of respectively branching out and extending the adjustment strap 32 and the adjustment buckle 33 from the opposite ends of the loop strap 31 can extend the effective length of the adjustment strap 32, so that a larger adjustment range can be provided, and the cap band can adapt to a wider range of head circumference sizes.

[0048] Furthermore, in an embodiment of the present invention, the adjustment strap 32 is a flat strip structure and has a certain flexibility. The adjustment strap 32 is usually made of the same or similar material as the loop strap 31 to ensure the overall strength and durability. A series of positioning holes 321 are provided along the length direction of the adjustment strap 32, and specifically, they are usually set as a plurality of equally spaced positioning holes 321. The shapes, sizes and spacings of these positioning holes 321 are precisely designed to match the positioning posts 332 on the adjustment buckle 33. One end of the adjustment strap 32 is fixedly connected to one end of the loop strap 31 (permanently fixed by in-mold injection or snap structure as described above). The other end of the adjustment strap 32 passes through the adjustment buckle 33 and cooperates with the positioning posts 332 on the adjustment buckle 33 through the positioning holes 321 to achieve fixation of different lengths, thereby adjusting the circumference of the cap band.

[0049] Further, in an embodiment of the present invention, the adjustment buckle 33 is the core component of the cap band, used to achieve quick adjustment and locking of the circumference of the cap band. The adjustment buckle 33 includes a buckle body 331 connected to the annular band 31, a positioning post 332 provided on the surface of the buckle body 331, and two ejecting mechanisms 333 distributed on both sides of the buckle body 331. Specifically, the buckle body 331 is the main part of the adjustment buckle 33, usually injection molded from high-strength engineering plastics.

[0050] Further, in an embodiment of the present invention, a channel running through both sides is provided inside the buckle body 331 for the adjustment belt 32 to pass through. The buckle body 331 includes a first guiding and limiting portion 3311 connected to the annular band 31, a main body portion 3312 connected to the first guiding and limiting portion 3311 and carrying the positioning post 332, and a second guiding and limiting portion 3313 connected to the main body portion 3312; the first guiding and limiting portion 3311 is located on the outlet side of the channel and allows the adjustment belt 32 to pass out, and the second guiding and limiting portion 3313 is located on the inlet side of the channel and allows the adjustment belt 32 to pass in. Therefore, when the adjustment belt 32 passes through the buckle body 331 for fixation, the adjustment belt 32 passes into the second guiding and limiting portion 3313 located on the inlet side of the channel, then the positioning hole 321 of the adjustment belt 32 cooperates with the positioning post 332 on the main body portion 3312, and then the adjustment belt 32 passes out from the first guiding and limiting portion 3311 located on the outlet side of the channel. Further, the buckle body 331 is generally slightly bent towards the center direction of the wearer, and arc-shaped curved surfaces facilitating the passage of the adjustment belt 32 are provided on both side walls of the main body portion 3312, so that when the adjustment belt 32 passes into the second guiding and limiting portion 3313, it can be slightly inclined upward without touching the positioning post 332 on the main body portion 3312. In one type of cap band in this embodiment, referring to Figure 4 as shown, its first guiding and limiting portion 3311 and second guiding and limiting portion 3313 are directly connected to both ends of the side wall of the main body portion 3312. Further, in another type of cap band in this embodiment, referring to Figure 5 and Figure 6 as shown, a curved arc-shaped transition region is provided at the connection between the first guiding and limiting portion 3311 and the second guiding and limiting portion 3313 and both ends of the side wall of the main body portion 3312. At this time, the arc bending design of this transition region can disperse the stress to a larger area and avoid fatigue fracture at the connection. At the same time, when the buckle body 331 is suddenly subjected to the pulling force of the adjustment belt 32, the bent portion of the transition region can provide a certain buffer to reduce the direct impact on the connection.

[0051] Specifically, in an embodiment of the present invention, the first guiding and limiting portion 3311 includes two first connecting pieces respectively connected to both sides of the buckle body 331 and the ejecting mechanism 333, and a first limiting piece, a second limiting piece, and a third limiting piece that are parallel and are sequentially arranged in a staggered manner outward from one side of the main body portion 3312 and are respectively connected to the two first connecting pieces; the second limiting piece is substantially in the same plane as the main body portion 3312; the second guiding and limiting portion 3313 includes two second connecting pieces respectively connected to both sides of the buckle body 331 and the ejecting mechanism 333, and a fourth limiting piece and a fifth limiting piece that are parallel and are sequentially arranged in a staggered manner outward from one side of the main body portion 3312 and are respectively connected to the two second connecting pieces; the fifth limiting piece is substantially in the same plane as the main body portion 3312. Specifically, the two first connecting pieces connect both sides of the buckle body 331 on the channel outlet side and the ejecting mechanism 333, and the first limiting piece, the second limiting piece, and the third limiting piece are sequentially arranged in a staggered manner outward (in the direction away from the inside of the buckle body 331) from one side of the main body of the buckle body 331 (the part carrying the positioning post 332). Among them, the second limiting piece is substantially in the same plane as the main body portion 3312 of the buckle body 331, and the first limiting piece and the third limiting piece located on both sides of the second limiting piece are parallel to the second limiting piece but are offset in the direction away from the main body portion 3312, forming a staggered space. At this time, the first limiting piece, the second limiting piece, and the third limiting piece are not completely connected, and a slit for the adjusting belt 32 to pass through is formed between the three, and the slit gap between the three is slightly larger than the thickness of the adjusting belt 32. Correspondingly, the two second connecting pieces connect both sides of the buckle body 331 on the channel inlet side and the ejecting mechanism 333, and the fourth limiting piece and the fifth limiting piece are sequentially arranged in a staggered manner outward (in the direction away from the inside of the buckle body 331) from one side of the main body of the buckle body 331 (the part carrying the positioning post 332). Among them, the fifth limiting piece away from the main body portion 3312 is substantially in the same plane as the main body portion 3312 of the buckle body 331, and the fourth limiting piece close to the main body portion 3312 is parallel to the fifth limiting piece but is offset in the direction away from the main body portion 3312, forming a staggered space. At this time, the fourth limiting piece and the fifth limiting piece are not completely connected, and a slit for the adjusting belt 32 to pass through is formed between the two, and the slit gap between the two is slightly larger than the thickness of the adjusting belt 32. The first guiding and limiting portion 3311 and the second guiding and limiting portion 3313 are mainly used for facilitating manufacturing and assembly, facilitating the limiting and guiding of the adjusting belt 32, facilitating material saving and weight reduction, and avoiding jamming by setting a plurality of limiting piece structures that are parallel and arranged in a staggered manner, rather than a completely enclosed cylindrical structure. Specifically, the adjusting buckle 33 of the safety helmet usually adopts an injection molding process. Among them, the staggered limiting piece structure is easier to demold than the completely enclosed cylindrical structure, reducing the complexity of mold design and manufacturing cost. And the staggered structure allows the adjusting belt 32 to be inserted from the side, making assembly more convenient.The simultaneously and alternately arranged limiting piece structures can effectively restrict the movement of the adjusting strap 32 in the vertical direction (i.e., the thickness direction), preventing the adjusting strap 32 from being distorted or flipped during use. Meanwhile, the slits between multiple limiting pieces play a guiding role in the horizontal direction, ensuring that the adjusting strap 32 passes through along the correct path. At the same time, compared with a completely enclosed cylinder, the alternately arranged structure can save materials and reduce the weight of the adjusting buckle 33, thereby improving the overall wearing comfort of the safety helmet. At the same time, when the adjusting strap 32 cooperates with the positioning hole 321, a section of the adjusting strap 32 bulges slightly due to being embedded by the positioning post 332, while the alternately arranged limiting piece structure can avoid the embedding of the positioning post 332 without hindering the passage of the adjusting strap 32.

[0052] Furthermore, at the entrance side of the channel, a fifth limiting piece away from the main body 3312 is arranged substantially in the same plane as the main body 3312 of the buckle body 331, while a fourth limiting piece close to the main body 3312 is parallel to the fifth limiting piece but offset in a direction away from the main body 3312, the main purpose of which is to allow a smooth transition when the adjustment belt 32 is inserted. If the fifth limiting piece located on the outside is offset in a direction away from the main body 3312, while the fourth limiting piece located on the inside is flush with the main body 3312, then the adjustment belt 32 will first hit the edge of the fourth limiting piece when inserted, and will conflict with the positioning column 332 of the main body 3312 when inserted flush, which may cause jamming, obstruction, or even damage to the adjustment belt 32. By offsetting the fourth limiting piece in a direction away from the main body 3312, and the fifth limiting piece being flush with the main body 3312, even if the adjusting belt 32 is slightly deflected during insertion, it can be guided to the correct direction and enter the slit between the fourth limiting piece and the fifth limiting piece. The adjusting belt 32 is allowed to have a certain angle deviation during insertion, thereby improving the insertion tolerance. At the same time, when the adjusting belt 32 enters the main body 3312, the adjusting belt 32 can be slightly raised upwards instead of downwards, thereby ensuring that no bending occurs during insertion. At the same time, the offset of the inner limiting piece can also play a certain role in preventing the adjusting belt 32 from slipping off. When the adjusting belt 32 is fully inserted, the inner fourth limiting piece can block the movement of the adjusting belt 32 to the outside (i.e., the direction of disengagement). Correspondingly, on the channel exit side, the middle second limiting piece is arranged to be substantially in the same plane as the main body 3312 of the buckle body 331, while the first limiting piece and the third limiting piece on both sides are parallel to the second limiting piece, but offset in the direction away from the main body 3312, which is mainly used to limit the adjustment belt 32 in both directions. In other words, whether the adjustment belt 32 is pulled inward or outward, it can be effectively restricted in the slit formed by the three limiting pieces to prevent it from being offset or twisted in the vertical direction. At the same time, after the adjustment belt 32 passes out, it cooperates with the positioning hole 321. When the positioning column 332 is embedded in the positioning hole 321, the part of the adjustment belt 32 will have a certain bulge. Therefore, the first limiting piece and the third limiting piece are offset in the direction away from the main body 3312, which can avoid the cooperation between the positioning column 332 and the positioning hole 321, so as not to affect the passage of the adjustment belt 32.

[0053] Further, in an embodiment of the present invention, positioning posts 332 (usually elastic protrusion structures) are provided on the surface of the buckle body 331. Specifically, they are usually arranged as a plurality of positioning posts 332 distributed at equal intervals. When the adjustment belt 32 passes through the adjustment buckle 33, the positioning posts 332 will snap into the positioning holes 321 on the adjustment belt 32, thereby fixing the adjustment belt 32 at a specific position. A guiding inclined surface 3321 is provided on the positioning post 332 on the channel entrance side. The guiding inclined surface 3321 is used to guide the adjustment belt 32 to effectively slide and insert on the positioning post 332, so that the adjustment belt 32 will not be continuously locked by the positioning posts 332 when the adjustment belt 32 is continuously inserted into the adjustment buckle 33 to adjust the circumference of the adjustment cap. A locking surface 3322 is provided on the positioning post 332 on the channel exit side. The locking surface 3322 matches the positioning hole 321 and is substantially perpendicular to the moving direction of the adjustment belt 32, and is used to embed into the positioning hole 321 to fix the adjustment belt 32. At this time, when the adjustment belt 32 is inserted and adjusted to a proper position, the locking surface 3322 can be embedded into the positioning hole 321 to achieve locking. Further, the positioning holes 321 and the positioning posts 332 are both distributed at equal intervals, and the distance between two adjacent positioning posts 332 is a multiple of the distance between two adjacent positioning holes 321. So that during the adjustment process, each positioning post 332 can be completely snapped into the positioning hole 321 at a specific position, thereby achieving fixation. By adjusting the spacing of the positioning holes 321, the adjustment step can be controlled, so that the number of positioning posts 332 can be reduced and only a larger number of positioning holes 321 with shorter spacing can be provided to effectively achieve fine adjustment.

[0054] Further, in an embodiment of the present invention, an ejection mechanism 333 is provided on each side of the buckle body 331. When it is necessary to loosen the cap hoop, the adjustment band 32 is ejected by pressing, so that the positioning hole 321 is disengaged from the positioning post 332. The ejection mechanism 333 includes a pressing portion 3331 whose two ends are connected to the buckle body 331 and the middle part of which can be deformed by pressing along the center of the buckle body 331, and a jacking portion 3332 connected to the inner wall of the middle part of the pressing portion 3331 and having an upward inclined surface or arc surface; the jacking portion 3332 is used to synchronously contact and lift the edge of the adjustment band 32 through the inclined surface or arc surface when the pressing portion 3331 is pressed and deformed. The pressing portion 3331 is the operable part of the ejection mechanism 333, and it is generally a C-shaped cantilever structure extending from the side surface (top surface and bottom surface) of the buckle body 331. At this time, the wearer can press the pressing portion 3331 inward to cause elastic deformation. That is, the two ends of the pressing portion 3331 are connected to the buckle body 331, and the middle part can be deformed by pressing along the center direction of the buckle body 331. Further, the outer edge of the middle part of the pressing portion 3331 is in an arc shape bent away from the buckle body 331, which is convenient for finger pressing. At the same time, the bent arc shape can also increase the structural strength of the edge of the pressing portion 3331 to prevent accidental breakage. The jacking portion 3332 is connected to the inner wall of the middle part of the pressing portion 3331 and has an upward inclined surface or arc surface. When the pressing portion 3331 is pressed, the inclined surface or arc surface of the jacking portion 3332 will synchronously contact and lift the edge of the adjustment band 32 to assist the adjustment band 32 to disengage from the positioning post 332.

[0055] Further, in another embodiment of the present invention, the ejection mechanism 333 further includes a linkage portion 3333 that is respectively connected to the pressing portion 3331 and the jacking portion 3332 and forms a sliding fit with the buckle body 331; a guiding inclined surface 3321 for guiding the linkage portion 3333 to slide towards the center of the buckle body 331 is provided on one side of the buckle body 331 close to the linkage portion 3333, and a sliding inclined surface that slidably cooperates with the guiding inclined surface 3321 of the buckle body 331 is provided on the linkage portion 3333; it is used to jack up the inner surface of the adjusting belt 32 by sliding on the guiding inclined surface 3321 when the pressing portion 3331 is pressed and deformed. The linkage portion 3333 is respectively connected to the pressing portion 3331 and the jacking portion 3332, and forms a sliding fit with the buckle body 331. The length of the linkage portion 3333 is greater than the distance between the pressing portion 3331 and the adjusting belt 32, so that in the normal state, the end of the linkage portion 3333 away from the pressing portion 3331 is located below the adjusting belt 32. A sliding inclined surface is provided on the linkage portion 3333, and a guiding inclined surface 3321 for guiding the linkage portion 3333 to slide towards the center of the buckle body 331 is provided on one side of the buckle body 331 close to the linkage portion 3333. The sliding inclined surface cooperates with the guiding inclined surface 3321. When the pressing portion 3331 is pressed, the linkage portion 3333 will slide along the guiding inclined surface 3321 to jack up the inner surface of the adjusting belt 32, further facilitating the separation of the adjusting belt 32 from the positioning post 332.

[0056] When adjusting the circumference of the cap hoop, the adjusting belt 32 is inserted from the channel entrance side of the adjusting buckle 33. At this time, the positioning post 332 starts to be stuck into the positioning hole 321 of the adjusting belt 32, and due to the guiding inclined surface 3321 of the positioning post 332, the adjusting belt 32 can continue to be inserted. When the adjustment is completed, due to the engagement between the locking surface 3322 of the positioning post 332 and the positioning hole 321, the loosening of the adjusting belt 32 is prevented, so the adjusting belt 32 can be effectively fixed, and at this time the circumference of the cap hoop remains unchanged. When it is necessary to adjust the size of the cap hoop, the wearer presses the pressing portions 3331 on both sides of the adjusting buckle 33 with fingers at the same time. At this time, the pressing force is transmitted through the jacking portion 3332 and the linkage portion 3333 to jack up the adjusting belt 32, so that the positioning post 332 is disengaged from the positioning hole 321. At this time, the adjusting belt 32 can slide freely, and the wearer can adjust the circumference of the cap hoop or loosen it as needed. When the wearer releases the pressing portion 3331, the positioning hole 321 of the adjusting belt 32 is re-stuck into the positioning post 332 or taken out from the channel entrance side of the adjusting buckle 33.

[0057] In summary, for the cap band applied to a safety helmet in the above embodiments of the present invention, by setting the cooperation of the adjustment strap and the adjustment buckle, the perimeter of the cap band can be accurately adjusted; by means of the ejection mechanism provided on the adjustment buckle, the wearer only needs to press both sides of the adjustment buckle with one hand to easily unlock the adjustment strap and adjust the perimeter of the cap band. Thus, it is more convenient and faster than the traditional gear adjustment (usually requiring two hands to operate); and through the cooperation mode of the positioning posts and positioning holes provided on the adjustment buckle, the adjustment process is very rapid. Just pull the adjustment strap to the appropriate position and release the pressure to fix it. At the same time, by respectively arranging a guiding inclined surface and a locking surface on both sides of the positioning post, the guiding inclined surface can facilitate the insertion of the adjustment strap, and the matching of the locking surface and the positioning hole ensures that the cap band can be firmly fixed after adjustment and will not accidentally loosen during use; and the adjustment buckle part provided is lighter than the traditional gear adjustment mechanism, which helps to reduce the overall weight of the safety helmet, thereby improving the wearing comfort; at the same time, compared with the traditional gear adjustment mechanism, the adjustment strap and the adjustment buckle are designed with fewer components and a simpler structure, reducing the risk of failure. It solves the problems of insufficient wearing comfort and operation convenience of the existing safety helmet.

[0058] Embodiment 2

[0059] Please refer to Figure 7 , the safety helmet shown in the second embodiment of the present invention is shown. For the sake of convenience of description, only the parts related to the embodiments of the present invention are shown. The safety helmet provided by the embodiments of the present invention includes a cap shell 10, a top strap 20 fixedly connected to the cap shell 10, a cap band 30 applied to the safety helmet as described in the foregoing embodiments and fixedly connected to the top strap 20, and a chin strap 40 and a sweat-absorbing strap 50 fixedly connected to the cap band 30. The specific content in the safety helmet 10 and the cap band 30 can be referred to the foregoing embodiments. The implementation principle and the technical effects produced are the same as those of the foregoing embodiments. For a brief description, for the parts not mentioned in this embodiment, reference can be made to the corresponding content in the foregoing embodiments.

[0060] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A headband for a safety helmet, characterized in that: It includes a ring belt, and an adjustment belt and an adjustment buckle respectively connected to two ends of the ring belt; The adjusting belt is provided with a plurality of positioning holes along its length direction; The adjusting buckle comprises a buckle body connected to the ring belt, a positioning column arranged on the surface of the buckle body, and two ejection mechanisms distributed on both sides of the buckle body; The buckle body is provided with a channel running through both sides for the adjustment belt to pass through, the positioning column is provided with a guiding inclined surface for inserting the adjustment belt on the channel entrance side, and the positioning column is provided with a stop surface matching the positioning hole and used to embed in the positioning hole on the channel exit side, and the ejection mechanism is used to synchronously lift the adjustment belt when pressed to make the positioning hole detach from the positioning column.

2. The headband for a safety helmet according to claim 1, characterized in that: The ejection mechanism comprises a pressing portion whose two ends are connected to the buckle body and whose middle portion can be pressed and deformed along the center of the buckle body, and a lifting portion connected to the inner wall of the middle portion of the pressing portion and having an upward inclined surface or arc surface; The lifting portion is used to synchronously contact and lift up the edge of the adjusting belt through the inclined surface or the curved surface when the pressing portion is pressed and deformed.

3. The headband for a safety helmet according to claim 2, characterized in that: The ejection mechanism also includes a linkage part which is respectively connected to the pressing part and the lifting part and forms a sliding fit with the buckle body; A guide slope is provided on one side of the buckle body close to the linkage part for guiding the linkage part to slide toward the center of the buckle body, and the linkage part is provided with a sliding slope that slidably cooperates with the guide slope of the buckle body; The linkage portion is used to lift up the inner surface of the adjustment belt by sliding on the guide slope when the pressing portion is pressed and deformed.

4. The headband for a safety helmet according to claim 1, characterized in that: The buckle body comprises a first guide and limit portion connected to the annular belt, a main body connected to the first guide and limit portion and carrying the positioning column, and a second guide and limit portion connected to the main body; The first guide limiting portion is located at the channel exit side and is used for the adjusting belt to pass through, and the second guide limiting portion is located at the channel entrance side and is used for the adjusting belt to pass through.

5. The headband for a safety helmet according to claim 4, characterized in that: The first guide limiting portion comprises two first connecting pieces respectively connected to the two sides of the buckle body and the ejection mechanism, and a first limiting piece, a second limiting piece and a third limiting piece respectively connected to the two first connecting pieces and arranged in parallel and staggered outward from one side of the main body in sequence; the second limiting piece and the main body are substantially in the same plane; The second guide limiting portion includes two second connecting pieces respectively connected to the two sides of the buckle body and the ejection mechanism, and a fourth limiting piece and a fifth limiting piece respectively connected to the two second connecting pieces and arranged in parallel and staggered from one side of the main body to the outside in sequence; the fifth limiting piece and the main body are basically in the same plane.

6. The headband for a safety helmet according to claim 2, characterized in that: The outer edge of the middle portion of the pressing portion is in an arc shape that bends away from the buckle body.

7. The headband for a safety helmet according to claim 1, characterized in that: The positioning holes and the positioning posts are distributed at equal intervals, and the distance between two adjacent positioning posts is a multiple of the distance between two adjacent positioning holes.

8. The headband for a safety helmet according to claim 1, characterized in that: The adjusting belt and the adjusting buckle are respectively forked and extend out of opposite ends of the ring belt.

9. The headband for a safety helmet according to claim 1, characterized in that: The ring belt is provided with ventilation holes, anti-collision columns, fixing columns for connecting and fixing the top belt and the chin belt of the safety helmet, and fixing protrusions for connecting and fixing the sweat-absorbing belt of the safety helmet along its length direction.

10. A safety helmet, characterized in that: It comprises a cap shell, a top strap connected and fixed to the cap shell, a cap hoop used for a safety helmet as claimed in any one of claims 1 to 9 connected and fixed to the top strap, and a chin strap and a sweat-absorbing belt connected and fixed to the cap hoop.

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