Head circumference adjusting assembly and helmet

Abstract

The utility model belongs to the technical field of head protection devices, and particularly relates to a head circumference adjusting assembly and a helmet with the head circumference adjusting assembly. The head circumference adjusting assembly comprises an adjuster arranged at the rear end of the helmet body, an adjusting support, a connecting belt arranged at the front end of the helmet body, a first adjusting rope and a second adjusting rope. One ends of the first adjusting rope and the second adjusting rope are respectively connected to the adjuster, and the other ends of the first adjusting rope and the second adjusting rope respectively penetrate through a guide pipe pre-embedded in the helmet body, penetrate through the corresponding end of the connecting belt and are connected with the corresponding end of the adjusting bracket; the adjuster adjusts the lengths of the first adjusting rope and the second adjusting rope at the same time so as to drive the adjusting support to generate corresponding deformation to achieve the purpose of adjusting the size of the head circumference. According to the helmet, the rope is adjusted to be wound or unwound through the adjuster to drive the adjusting support to generate symmetrical deformation to finally achieve the purpose of adjusting the size of the head circumference through the adjusting support, the wearing comfort degree is high after adjustment, the helmet does not need to be taken down during adjustment, and adjustment is rapid and convenient.

Description

Technical field:

[0001] The utility model belongs to the technical field of head protection devices, in particular to a head circumference adjustment component and a helmet with the head circumference adjustment component. Background technology:

[0002] Helmets can be used to protect the head. They are required in riding, security, firefighting, electricity and other occasions. Usually, the size of the helmet is fixed, but the head circumference of the wearer is large or small. In order to enable each wearer to wear a helmet of the right size, helmets with head circumference adjustment components have appeared on the market. The structure of the head circumference adjustment component includes a loop fixed on the helmet body. When the size needs to be adjusted, the helmet needs to be removed, the two ends of the loop are disassembled, and then the two ends are brought close and snapped together according to the actual size, which is very inconvenient to use. Summary of the invention:

[0003] The utility model aims to provide a head circumference adjustment component and a helmet which can be adjusted quickly and conveniently without taking off the helmet.

[0004] The utility model is achieved in this way:

[0005] One of the purposes of the utility model is to provide a helmet and a head circumference adjustment component, comprising an adjuster arranged at the rear end of the helmet body, an adjustment bracket, a connecting belt arranged at the front end of the helmet body, and a first adjustment rope and a second adjustment rope. One end of the first adjustment rope and the second adjustment rope are respectively connected to the adjuster, and the other ends respectively pass through a conduit pre-buried in the helmet body, pass through the corresponding ends of the connecting belt and are connected to the corresponding ends of the adjustment bracket. The adjuster simultaneously adjusts the lengths of the first adjustment rope and the second adjustment rope, thereby driving the adjustment bracket to produce corresponding deformation to achieve the purpose of adjusting the head circumference size.

[0006] In the above-mentioned head circumference adjustment assembly, the adjuster includes a winding wheel, a toothed disc, a ratchet and a knob, a connecting shaft is arranged in the center of the knob, the ratchet and the winding wheel are sequentially mounted on the connecting shaft and are axially limited by a limit piece, and the ratchet is connected to the knob and the winding wheel, a toothed disc is mounted on the outside of the winding wheel, the ratchet is located on one end face of the toothed disc and meshes with a gear ring on the toothed disc, the geared disc is connected to the base of the adjuster, the knob drives the ratchet to rotate, the ratchet pawl meshes with the gear ring for transmission, and drives the winding wheel to rotate for winding or releasing the line.

[0007] In the above-mentioned head circumference adjustment component, the adjuster base is a structure with a bottom plate at the bottom and an opening at the upper end. A plurality of arc-shaped protrusions are distributed circumferentially inside the adjuster base. The arc-shaped protrusions are distributed in a circular shape. A clamping protrusion is provided on the inner wall of at least two arc-shaped protrusions. An annular convex edge is provided on the toothed disc. The annular convex edge is limited between the bottom plate of the adjuster base and the clamping protrusion to realize the positioning of the toothed disc in the adjuster base.

[0008] In the above-mentioned head circumference adjustment component, two wire protrusions are radially arranged on the outer cylindrical surface of the toothed disk, a wire groove is arranged on the wire protrusion, a wire protrusion mounting groove is arranged on the adjuster base, the wire protrusion is arranged in the wire protrusion mounting groove, a catheter joint is arranged on the adjuster base corresponding to the wire protrusion mounting groove, a wire hole connecting the wire groove and the inner hole of the catheter is arranged on the catheter joint, and the catheter is connected to the catheter joint.

[0009] In the above-mentioned head circumference adjustment assembly, a connecting groove is arranged at the center of the winding wheel, an avoidance hole is arranged at the center of the toothed disc, and a connecting protrusion is arranged at the center of the ratchet wheel. The connecting protrusion passes through the avoidance hole and is arranged on the connecting groove.

[0010] In the above-mentioned head circumference adjustment assembly, more than two driving holes are distributed on the end surface of the knob, and bosses extending into the driving holes are arranged at corresponding positions on the ratchet, and the knob drives the ratchet to move through the bosses.

[0011] In the above-mentioned head circumference adjustment component, the winding wheel includes a wheel body, and a first annular groove and a second annular groove are provided on the wheel body, which are respectively used for winding two adjustment ropes; a first thread end limiting groove is provided on one end face of the wheel body, and the first thread end limiting groove is connected with the first annular groove through a first through hole; a first limiting head is provided at one end of the first adjustment rope, the first limiting head is limited in the first thread end limiting groove, and the first adjustment rope passes through the first through hole and is located in the first annular groove; a second thread end limiting groove is provided on the other end face of the wheel body, and the second limiting head limiting groove is connected with the second annular groove through the first through hole; a second limiting head is provided at one end of the second adjustment rope, the second limiting head is limited in the second thread end limiting groove, and the second adjustment rope passes through the second through hole and is located in the second annular groove.

[0012] In the above-mentioned head circumference adjustment component, winding rings are provided on the outer surfaces of both ends of the connecting belt, and extension plates extending radially outward are provided on the winding rings. The extension plates are spaced apart from the outer side walls of the connecting belt. The adjustment rope is wound around the winding rings and limited by the outer side walls of the connecting belt and the extension plates.

[0013] In the above-mentioned head circumference adjustment component, the adjustment bracket has three fulcrums, and the three fulcrums are distributed in an isosceles triangle, wherein the fulcrum corresponding to the vertex is fixedly connected to the helmet body, and the other two fulcrums are adjustment rope connection fulcrums, and the adjustment rope connection fulcrums are provided with connecting grooves, and limiting protrusions are staggered on the two groove walls of the connecting groove. The distance from the limiting protrusion to the bottom wall of the connecting groove is smaller than the size of the limiting head on the adjusting rope, so that the corresponding limiting head of the adjusting rope is limited in the connecting groove.

[0014] Another object of the utility model is to provide a helmet, comprising the above-mentioned head circumference adjustment component.

[0015] The outstanding advantages of the utility model compared with the prior art are:

[0016] The utility model uses an adjuster to adjust the rope winding or releasing, thereby driving the adjustment bracket to produce symmetrical deformation, and finally achieves the purpose of adjusting the head circumference by the adjustment bracket. After adjustment, the wearing comfort is high, and there is no need to remove the helmet during adjustment, so the adjustment is fast and convenient. Description of the drawings:

[0017] Figure 1 It is a schematic diagram of the head circumference adjustment component of the utility model;

[0018] Figure 2 It is a schematic diagram of the head circumference adjustment component of the utility model being arranged on the helmet body;

[0019] Figure 3 It is a schematic diagram of the utility model in which one end of the first adjustment rope and the second adjustment rope are connected to the regulator and the other ends are extended out of the corresponding conduits respectively;

[0020] Figure 4 It is a schematic diagram showing that the regulator of the utility model is arranged on the regulator base, and a conduit is arranged on the regulator base;

[0021] Figure 5 It is one of the schematic diagrams of the connection between the adjuster of the utility model and one end of the first adjusting rope and the second adjusting rope;

[0022] Figure 6 This is the second schematic diagram of the connection between the regulator of the utility model and one end of the first regulating rope and the second regulating rope;

[0023] Figure 7 It is a schematic diagram of the utility model in which one end of the first adjustment rope and the second adjustment rope are connected to the winding wheel;

[0024] Figure 8 It is an exploded schematic diagram of the regulator of the utility model;

[0025] Fig. 9 It is a top view of the regulator of the utility model arranged on the regulator base;

[0026] Fig.10 yes Fig. 9 AA section view;

[0027] Fig.11 It is a schematic diagram of the regulator base of the utility model;

[0028] Fig.12 It is a schematic diagram of the toothed disc of the utility model;

[0029] Fig.13It is a schematic diagram of the winding wheel of the utility model;

[0030] Fig.14 It is a schematic diagram of the ratchet of the utility model;

[0031] Fig.15 It is a schematic diagram of the knob of the utility model;

[0032] Fig.16 It is a schematic diagram of the connecting belt of the utility model;

[0033] Fig.17 It is a schematic diagram of the adjustment bracket of the utility model;

[0034] Fig.18 yes Fig.17 A partial enlarged schematic diagram of .

[0035] In the figure: 1, helmet body; 2, adjuster; 3, adjustment bracket; 4, connecting belt; 5, first adjustment rope; 6, second adjustment rope; 7, guide tube; 8, winding wheel; 9, toothed disc; 10, ratchet; 11, knob; 12, connecting shaft; 13, end screw; 14, gear ring; 15, adjuster base; 16, bottom plate; 17, arc-shaped protrusion; 18, clamping protrusion; 19, annular protrusion; 20, wire protrusion; 21, wire groove; 22, wire protrusion Mounting groove; 23. Conduit joint; 24. Wire hole; 25. Connection groove; 26. Avoidance hole; 27. Connection protrusion; 28. Drive hole; 29. ​​Boss; 30. Wheel body; 31. First annular groove; 32. Second annular groove; 33. First wire end limiting groove; 34. First limiting head; 35. Second wire end limiting groove; 36. Second limiting head; 37. Winding ring; 38. Extension plate; 39. Connection groove; 40. Limiting protrusion; 41. Surface cover. Specific implementation method:

[0036] The present invention is further described below with specific embodiments:

[0037] Example 1: See Figure 1 —18:

[0038] The present embodiment provides a head circumference adjustment component, which includes an adjuster 2 arranged at the rear end of a helmet body 1, an adjustment bracket 3, a connecting belt 4 arranged at the front end of the helmet body 1, and a first adjustment rope 5 and a second adjustment rope 6. One end of the first adjustment rope 5 and the second adjustment rope 6 are respectively connected to the adjuster 2, and the other ends respectively pass through a conduit 7 pre-buried in the helmet body 1, and are connected to the corresponding ends of the connecting belt 4 and the corresponding ends of the adjustment bracket 3. The adjuster 2 simultaneously adjusts the length of the first adjustment rope 5 and the second adjustment rope 6, thereby driving the adjustment bracket 3 to produce corresponding deformation to achieve the purpose of adjusting the head circumference size.

[0039] The utility model achieves the purpose of adjusting the size of the head circumference through the adjuster, has high comfort in use, does not need to take off the helmet during adjustment, has fast and convenient adjustment, and is suitable for various helmets.

[0040] Further, the regulator 2 includes a winding wheel 8, a toothed disc 9, a ratchet 10 and a knob 11. A connecting shaft 12 is arranged at the center of the knob 11. The ratchet 10 and the winding wheel 8 are sequentially mounted on the connecting shaft 12 and axially limited by a limiting member. In this embodiment, the limiting member adopts an end screw 13. Of course, it can also be achieved by a retaining spring, a retaining ring, etc. The ratchet 10 is connected to the knob 11 and the winding wheel 8. A toothed disc 9 is mounted on the outside of the winding wheel 8. The ratchet 10 is located on one end face of the toothed disc 9 and meshes with a toothed ring 14 on the toothed disc 9. The toothed disc 9 is connected to the regulator base 15. The knob 11 drives the ratchet 10 to rotate, and the ratchet 10 meshes with the toothed ring 14 for transmission, and drives the winding wheel 8 to rotate for winding or unwinding. Due to the structure of the ratchet 10 and the toothed ring 14, after the ratchet 10 rotates a certain angle, it can be self-locked with the toothed ring 14. Among them, the regulator base 15 is also formed integrally with the helmet body 1.

[0041] Specifically, the regulator base 15 is a structure with a bottom plate 16 at the bottom and an opening at the top. A plurality of arc-shaped protrusions 17 are circumferentially distributed inside the regulator base 15. The arc-shaped protrusions 17 are distributed in a circumferential shape. A clamping protrusion 18 is provided on the inner wall of at least two arc-shaped protrusions 17. The toothed disc 9 is provided with an annular convex edge 19. The annular convex edge 19 is limited between the bottom plate 16 of the regulator base 15 and the clamping protrusion 18 to realize the positioning of the toothed disc 9 in the regulator base 15. The structure of the plurality of arc-shaped protrusions 17 facilitates the clamping of the annular convex edge 19. In this embodiment, the clamping protrusions 18 are provided on four arc-shaped protrusions 17, and the clamping protrusions 18 are evenly distributed in the circumferential direction.

[0042] The ratchet 10 rotates, and the toothed disc 9 does not rotate. In this embodiment, two wire protrusions 20 are radially arranged on the outer cylindrical surface of the toothed disc 9, and a wire groove 21 is arranged on the wire protrusion 20. A wire protrusion mounting groove 22 is arranged on the regulator base 15, and the wire protrusion 20 is arranged in the wire protrusion mounting groove 22. A catheter joint 23 is arranged on the regulator base 15 corresponding to the wire protrusion mounting groove 22, and a wire hole 24 is arranged on the catheter joint 23 to connect the wire groove 21 and the inner hole of the catheter 7, and the catheter 7 is connected to the catheter joint 23.

[0043] Through the above structure, the positioning of the toothed disc 9 in the axial direction and the circumferential direction is achieved.

[0044] In addition, it should be noted that the specific structure of the connection between the winding wheel 8 and the ratchet 10 is as follows: a connection groove 25 is provided at the center of the winding wheel 8, a avoidance hole 26 is provided at the center of the toothed disc 9, and a connection protrusion 27 is provided at the center of the ratchet 10, and the connection protrusion 27 passes through the avoidance hole 26 and is provided on the connection groove 25. After the connection, the rotation of the ratchet 10 can drive the winding wheel 8 to rotate.

[0045] The structure of the connection between the knob 11 and the ratchet 10 is as follows: the end surface of the knob 11 is provided with more than two driving holes 28, and in this embodiment, the driving holes 28 are triangular. A boss 29 extending into the driving hole 28 is provided at a corresponding position on the ratchet 10, and the boss 29 is located on the outer end of the pawl of the ratchet 10. The knob 11 drives the ratchet 10 to move through the boss 29.

[0046] Generally speaking, a surface cover 41 is provided on the end surface of the knob 11 to block all the driving holes 28 .

[0047] In this embodiment, the winding wheel 8 includes a wheel body 30, which is cylindrical. A first annular groove 31 and a second annular groove 32 are provided on the wheel body 30, which are respectively used to wind two adjusting ropes. A first thread end limiting groove 33 is provided on one end face of the wheel body 30, and the first thread end limiting groove 33 is connected with the first annular groove 31 through a first through hole. A first limiting head 34 is provided at one end of the first adjusting rope 5, and the first limiting head 34 is limited in the first thread end limiting groove 33, and the first adjusting rope 5 passes through the first through hole and is located in the first annular groove 31; a second thread end limiting groove 35 is provided on the other end face of the wheel body 30, and the second thread end limiting groove 35 is connected with the second annular groove 32 through a second through hole, and a second limiting head 36 is provided at one end of the second adjusting rope 6, and the second limiting head 36 is limited in the second thread end limiting groove 35, and the second adjusting rope 6 passes through the second through hole and is located in the second annular groove 32. The sizes of the first thread end 34 and the second limit head 36 are larger than the diameters of the first adjustment rope 5 and the second adjustment rope 6 , and they are positioned in the first thread end limit groove 33 and the second thread end limit groove 35 .

[0048] In addition, in this embodiment, winding rings 37 are provided on the outer surfaces of both ends of the connecting belt 4, and extension plates 38 extending radially outward are provided on the winding rings 37. The extension plates 38 are spaced apart from the outer wall of the connecting belt 4. The adjustment rope is wound around the winding rings 37 and is limited by the outer wall of the connecting belt 4 and the extension plates 38.

[0049] It should be noted that the adjustment bracket 3 of this embodiment has three fulcrums, which are distributed in an isosceles triangle, wherein the fulcrum corresponding to the vertex is fixedly connected to the helmet body 1, and the other two fulcrums are adjustment rope connection fulcrums, which can be adjusted in both left and right directions during adjustment. A connection groove 39 is provided at the adjustment rope connection fulcrum, and limiting protrusions 40 are staggeredly provided on the two groove walls of the connection groove 39. The distance from the limiting protrusion 40 to the bottom wall of the connection groove 39 is less than the size of the limiting head on the adjustment rope, so that the corresponding limiting head of the adjustment rope is limited in the connection groove 39.

[0050] Embodiment 2:

[0051] This embodiment provides a helmet, which includes the head circumference adjustment component described in Example 1.

[0052] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A head circumference adjustment component, characterized in that: The helmet comprises an adjuster (2) arranged at the rear end of a helmet body (1), an adjustment bracket (3), a connecting belt (4) arranged at the front end of the helmet body (1), and a first adjustment rope (5) and a second adjustment rope (6); one end of the first adjustment rope (5) and the second adjustment rope (6) are respectively connected to the adjuster (2), and the other ends respectively pass through a conduit (7) pre-buried in the helmet body (1) in sequence, and the corresponding ends of the connecting belt (4) are connected to the corresponding ends of the adjustment bracket (3); the adjuster (2) simultaneously adjusts the length of the first adjustment rope (5) and the second adjustment rope (6), thereby driving the adjustment bracket (3) to produce corresponding deformation, thereby achieving the purpose of adjusting the size of the head circumference.

2. A head circumference adjustment assembly according to claim 1, characterized in that: The regulator (2) comprises a winding wheel (8), a toothed disc (9), a ratchet (10) and a knob (11). A connecting shaft (12) is arranged at the center of the knob (11). The ratchet (10) and the winding wheel (8) are sequentially mounted on the connecting shaft (12) and axially limited by a limiting member. The ratchet (10) is connected to the knob (11) and the winding wheel (8). A toothed disc (9) is mounted outside the winding wheel (8). The ratchet (10) is located on one end surface of the toothed disc (9) and meshes with a toothed ring (14) on the toothed disc (9). The toothed disc (9) is connected to a regulator base (15). The knob (11) drives the ratchet (10) to rotate. The ratchet pawl meshes with the toothed ring (14) for transmission and drives the winding wheel (8) to rotate for winding or unwinding.

3. A head circumference adjustment assembly according to claim 2, characterized in that: The regulator base (15) is a structure with a bottom plate (16) provided at the bottom and an opening at the top. A plurality of arc-shaped protrusions (17) are circumferentially distributed inside the regulator base (15). The arc-shaped protrusions (17) are distributed in a circular shape. A clamping protrusion (18) is provided on the inner wall of at least two of the arc-shaped protrusions (17). The toothed disc (9) is provided with an annular convex edge (19). The annular convex edge (19) is limited between the bottom plate (16) of the regulator base (15) and the clamping protrusion (18) to realize the positioning of the toothed disc (9) in the regulator base (15).

4. A head circumference adjustment assembly according to claim 2 or 3, characterized in that: Two wire protrusions (20) are radially arranged on the outer cylindrical surface of the toothed disc (9), and a wire groove (21) is arranged on the wire protrusion (20). A wire protrusion mounting groove (22) is arranged on the regulator base (15), and the wire protrusion (20) is arranged in the wire protrusion mounting groove (22). A catheter joint (23) is arranged on the regulator base (15) at a position corresponding to the wire protrusion mounting groove (22), and a wire hole (24) is arranged on the catheter joint (23) for connecting the wire groove (21) and the inner hole of the catheter (7), and the catheter (7) is connected to the catheter joint (23).

5. A head circumference adjustment assembly according to claim 2, characterized in that: A connecting groove (25) is arranged at the center of the winding wheel (8), an avoidance hole (26) is arranged at the center of the toothed disc (9), and a connecting protrusion (27) is arranged at the center of the ratchet wheel (10). The connecting protrusion (27) passes through the avoidance hole (26) and is arranged on the connecting groove (25).

6. A head circumference adjustment assembly according to claim 2, characterized in that: The end surface of the knob (11) is provided with more than two driving holes (28), and a convex column (29) extending into the driving hole (28) is arranged at a corresponding position on the ratchet (10), and the knob (11) drives the ratchet (10) to move via the convex column (29).

7. A head circumference adjustment assembly according to claim 2, characterized in that: The winding wheel (8) comprises a wheel body (30), a first annular groove (31) and a second annular groove (32) are provided on the wheel body (30), respectively used for winding two adjustment ropes, a first thread end limiting groove (33) is provided on one end surface of the wheel body (30), the first thread end limiting groove (33) is connected to the first annular groove (31) through a first through hole, and a first limiting head (34) is provided at one end of the first adjustment rope (5), and the first limiting head (34) is limited in the first thread end limiting groove (33). The first adjusting rope (5) passes through the first through hole and is located in the first annular groove (31); a second thread end limiting groove (35) is provided on the other end surface of the wheel body (30); the second thread end limiting groove (35) is connected to the second annular groove (32) through the first through hole; a second limiting head (36) is provided at one end of the second adjusting rope (6); the second limiting head (36) is limited in the second thread end limiting groove (35); the second adjusting rope (6) passes through the second through hole and is located in the second annular groove (32).

8. The head circumference adjustment assembly according to claim 1, characterized in that: The outer surfaces of both ends of the connecting belt (4) are provided with winding rings (37), and the winding rings (37) are provided with extension plates (38) extending radially outward, and the extension plates (38) are spaced apart from the outer wall of the connecting belt (4). The adjustment rope is wound around the winding rings (37) and is limited by the outer wall of the connecting belt (4) and the extension plates (38).

9. The head circumference adjustment assembly according to claim 1, characterized in that: The adjustment bracket (3) has three fulcrums, which are distributed in an isosceles triangle, wherein the fulcrum corresponding to the vertex is fixedly connected to the helmet body (1), and the other two fulcrums are adjustment rope connection fulcrums, wherein the adjustment rope connection fulcrums are provided with connection grooves (39), and limiting protrusions (40) are alternately provided on the two groove walls of the connection groove (39), and the distance from the limiting protrusion (40) to the bottom wall of the connection groove (39) is smaller than the size of the limiting head on the adjustment rope, so that the corresponding limiting head of the adjustment rope is limited in the connection groove (39).

10. A helmet, characterized in that: It comprises a head circumference adjustment component as described in any one of claims 1-9.

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