Helmet head circumference rapid adjusting system

Abstract

The utility model discloses a helmet head circumference fast adjusting system which comprises a top cover, an upper chuck, a lower chuck, a wire wheel, a shell and a supporting frame, a bottom plate is fixed to the middle of the shell, a clamping shaft is integrally formed in the middle of the bottom plate, the lower end of the lower chuck is clamped to the wire wheel, a spring is connected between the lower chuck and the wire wheel, and a lower clamping block is formed at the upper end of the lower chuck in a surrounding mode. An upper clamping block is formed at the lower end of the upper chuck in a surrounding mode, the upper clamping block and the lower clamping block are connected in a clamped mode, a check piece is installed on the upper chuck, teeth are arranged on the inner side of the upper end of the shell, the check piece makes elastic contact with the teeth, the top cover is clamped on the upper chuck, the shell is connected to the middle of the supporting frame in a clamped mode, and an installation nail is arranged at the upper end of the supporting frame. The helmet head circumference rapid adjusting system has the functions of rotating for locking, rotating for loosening, separating and loosening the upper disc and the lower disc and closing and tightening the upper disc and the lower disc, time and labor are saved, and the use feeling of customers is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of adjustment structures, and in particular to a helmet head circumference quick adjustment system. Background Technology

[0002] Most head circumference adjusters on the market only have the function of rotating to lock or separating and relaxing the upper and lower plates, which is not very effective and the user experience is not good. Utility Model Content

[0003] One objective of this invention is to provide a helmet head circumference quick adjustment system that can be rotated to lock, rotated to loosen, and also allows for the separation and loosening of the upper and lower plates.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A helmet head circumference quick adjustment system includes a top cover, an upper chuck, a lower chuck, a reel, a shell, and a support frame. A base plate is fixed to the middle of the shell, and a locking shaft is integrally formed in the middle of the base plate. The reel is located inside the shell. The lower end of the lower chuck is engaged with the reel, and a spring connects the lower chuck and the reel. A lower locking block is formed around the upper end of the lower chuck, and an upper locking block is formed around the lower end of the upper chuck. The upper and lower locking blocks are engaged with each other. The locking shaft passes through the middle of the reel and the middle of the lower chuck in sequence and engages with the middle of the upper chuck. A return stop is installed on the upper chuck. Teeth are provided on the inner side of the upper end of the shell, and the return stop elastically contacts the teeth. The top cover is engaged with the upper chuck, and the shell is engaged with the middle of the support frame. A mounting pin is provided at the upper end of the support frame.

[0006] As a preferred technical solution, the outer side of the top cover is provided with anti-slip texture.

[0007] As a preferred technical solution, the lower outer side of the top cover is provided with an inner buckle, and the upper side of the outer shell is provided with an outer buckle, with the inner buckle fastened to the lower end of the outer buckle.

[0008] As a preferred technical solution, the top cover is provided with a first card seat and a second card seat inside. The outer side of the return stop is elastically provided with a first card strip. The first card strip swings on the upper chuck. One side of the first card seat presses against the outer side of the first card strip, and the other side of the first card seat abuts against the outer edge of the upper chuck. The outer side of the upper chuck is elastically formed with a second card strip. The second card strip and the middle of the upper chuck are provided with a movable groove, and the second card seat moves within the movable groove.

[0009] As a preferred technical solution, the upper block has a first vertical surface and a first arc-shaped inclined surface on both sides, and the lower block has a second vertical surface and a second arc-shaped inclined surface on both sides, with the first vertical surface and the second vertical surface in contact with each other, and the first arc-shaped inclined surface and the second arc-shaped inclined surface in contact with each other.

[0010] As a preferred technical solution, the lower end of the lower chuck is formed with a buckle, and the inner side of the reel is provided with a slot, and the buckle is fastened in the slot.

[0011] As a preferred technical solution, the base plate has a plurality of alignment holes arranged in a ring, and the lower end of the reel has a plurality of alignment protrusions, which are engaged in the alignment holes.

[0012] As a preferred technical solution, the slotting shaft has a cavity inside, and a magazine is placed inside the cavity, with the magazine extending outward.

[0013] As a preferred technical solution, the device includes a connecting wire, wherein the outer casing is provided with a first outer wire hole and a second outer wire hole, the reel is provided with a first inner wire hole and a second inner wire hole, the support frame is provided with a first limiting hole, a second limiting hole and a third limiting hole, the middle part of the connecting wire passes through the first limiting hole and the second limiting hole, and the end of the connecting wire passes through the third limiting hole, the first outer wire hole, the first inner wire hole and the second inner wire hole in sequence and is then snapped onto the reel.

[0014] As a preferred technical solution, a nail body is provided on the outer side of the support frame, a slot is opened in the middle of the nail body, the connecting line passes through the slot, a fixing position is provided on the nail body, and two nail bodies are respectively provided on both sides of the support frame.

[0015] The beneficial effects of this utility model are as follows: It provides a helmet head circumference quick adjustment system. By rotating the top cover forward, the connecting cable can be tightened in the reel. By rotating the top cover backward, the connecting cable is slowly loosened. When the top cover is pulled up, the upper chuck and the lower chuck separate, and the loosening reel can directly pull out the connecting cable, saving time and effort and improving the user experience. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of the helmet head circumference quick adjustment system described in the embodiment;

[0018] Figure 2 This is a perspective view of the knob structure described in the embodiment;

[0019] Figure 3This is a cross-sectional view of the knob structure described in the embodiment;

[0020] Figure 4 This is a first exploded view of the knob structure described in the embodiment;

[0021] Figure 5 This is a second exploded view of the knob structure described in the embodiment;

[0022] Figure 6 This is a perspective view of the nail body described in the embodiment.

[0023] Figures 1 to 6 middle:

[0024] 1. Top cover; 2. Upper chuck; 3. Lower chuck; 4. Thread pulley; 5. Outer shell; 6. Support frame; 7. Base plate; 8. Positioning shaft; 9. Spring; 10. Lower locking block; 11. Upper locking block; 12. Return stop; 13. Tooth; 14. Inner snap; 15. Outer snap; 16. First locking seat; 17. Second locking seat; 18. First locking bar; 19. Second locking bar; 20. Buckle; 21. Locking groove; 22. Alignment hole; 23. Alignment protrusion; 24. Magazine; 25. Connecting wire; 26. First outer wire hole; 27. Second outer wire hole; 28. First inner wire hole; 29. ​​Second inner wire hole; 30. First limiting hole; 31. Second limiting hole; 32. Third limiting hole; 33. Nail body; 34. Groove; 35. Fixing position; 36. Mounting nail. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 6 As shown in this embodiment, a helmet head circumference quick adjustment system includes a top cover 1, an upper chuck 2, a lower chuck 3, a spool 4, a housing 5, and a support frame 6. A base plate 7 is fixed to the middle of the housing 5, and a locking shaft 8 is integrally formed in the middle of the base plate 7. The spool 4 is located inside the housing 5. The lower end of the lower chuck 3 is engaged with the spool 4. A spring 9 connects the lower chuck 3 and the spool 4. A lower locking block 10 is formed around the upper end of the lower chuck 3. The lower end of the upper chuck 2... The upper chuck 11 is formed around the end, and the upper chuck 11 and the lower chuck 10 are engaged with each other. The chuck shaft 8 passes through the middle of the spool 4 and the middle of the lower chuck 3 in sequence and then engages with the middle of the upper chuck 2. A return stop 12 is installed on the upper chuck 2. Teeth 13 are provided on the inner side of the upper end of the outer shell 5. The return stop 12 and the teeth 13 are in elastic contact. The top cover 1 is engaged on the upper chuck 2. The outer shell 5 is engaged in the middle of the support frame 6. The upper end of the support frame 6 is provided with mounting nails 36.

[0027] The top cover 1, upper chuck 2, lower chuck 3, thread wheel 4, and outer shell 5 form a knob structure, which is independently installed on the support frame 6. When the knob is pulled up, the upper and lower plates separate, releasing the function; when the knob is pressed down, the upper and lower plates close, tightening the function.

[0028] When the top cover 1 is pressed down, it rotates clockwise. The top cover 1 pulls the upper chuck 2 clockwise. Under the linkage of the upper chuck block 11 and the lower chuck block 10, the lower chuck 3 also rotates clockwise. The lower chuck 3 drives the reel 4 to rotate clockwise, winding up the connecting wire 25. When the top cover 1 is pulled up, the upper chuck 2 is pulled up in conjunction. Under the action of the spring 9, the lower chuck 3 is lifted. However, a gap appears between the upper chuck 2 and the lower chuck 3, and the upper chuck block 11 and the lower chuck block 10 are no longer connected. The rotation of cover 1 at this time will not affect the rotation of lower chuck 3, so the spool 4 will not be affected by top cover 1. Also, because lower chuck 3 is lifted by spring 9, lower chuck 3 is at the high end relative to chuck shaft 8, so chuck shaft 8 shrinks and no longer restricts the middle of upper chuck 2. The rotation of top cover 1 will not affect the rotation of base plate 7 where chuck shaft 8 is located. Therefore, base plate 7 and spool 4 are relatively fixed. In addition, under the action of mounting nail 36, it can be connected to the embedded part at the rear of the helmet.

[0029] The outer side of the top cover 1 is provided with anti-slip texture, which makes the knob top cover 1 more stable and convenient.

[0030] An inner buckle 14 is provided at the lower outer side of the top cover 1, and an outer buckle 15 is provided around the upper end of the outer shell 5. The inner buckle 14 is fastened to the lower end of the outer buckle 15. Under the mutual restriction of the inner buckle 14 and the outer buckle 15, the top cover 1 will not detach from the outer shell 5 when it is pulled up, and it will still be within the restriction range of the outer shell 5 when it is pressed down.

[0031] The top cover 1 has a first card seat 16 and a second card seat 17 inside. The outer side of the return stop 12 is elastically provided with a first card strip 18. The first card strip 18 swings on the upper chuck 2. One side of the first card seat 16 presses against the outer side of the first card strip 18, and the other side of the first card seat 16 presses against the outer edge of the upper chuck 2. The outer side of the upper chuck 2 is elastically formed with a second card strip 19. The second card strip 19 and the middle of the upper chuck 2 are provided with a movable groove. The second card seat 17 moves in the movable groove. The two sides of the upper card block 11 are a first vertical surface and a first arc-shaped inclined surface, respectively. The two sides of the lower card block 10 are a second vertical surface and a second arc-shaped inclined surface, respectively. The first vertical surface fits into the second vertical surface, and the first arc-shaped inclined surface fits into the second arc-shaped inclined surface.

[0032] During the forward rotation of the top cover 1, the first card holder 16 restricts the upper chuck 2 from rotating forward. The first vertical surface and the second vertical surface are in contact. The first card strip 18 elastically locks outward onto the teeth 13 of the outer shell 5 to prevent retraction. When the lower chuck 3 and the connecting line 25 wheel 4 rotate forward, the connecting line 25 is wound and tightened. When the top cover 1 is reversed, the first card holder 16 presses the first card strip 18 inward. After the first card strip 18 is no longer locked onto the teeth 13, the top cover 1 can rotate along the outer shell 5. At this time, the upper card holder rotates in reverse under the push of the second card holder 17. However, after the first arc-shaped inclined surface contacts the second arc-shaped inclined surface, it pushes the lower card block 10 to move downward. The spring 9 begins to tighten, so that the upper chuck 2 and the lower chuck 3 can disengage from each other. The lower chuck 3 moves slightly within its rotatable range, so that the connecting line 25 is slowly loosened.

[0033] The lower end of the lower chuck 3 is formed with a buckle 20, and the inner side of the spool 4 is provided with a groove 21. The buckle 20 is fastened in the groove 21. Under the action of the buckle 20, the position between the lower chuck 3 and the spool 4 can only move in the up and down direction, which is achieved in conjunction with the spring 9.

[0034] The base plate 7 has a number of alignment holes 22 distributed in a ring, and the lower end of the spool 4 has a number of alignment protrusions 23. The alignment protrusions 23 are inserted into the alignment holes 22. When the connecting line 25 is tightened and loosened by rotation, the alignment protrusions 23 and the alignment holes 22 are aligned to the current position.

[0035] The locking shaft 8 has a cavity inside, in which a magazine 24 is placed. The magazine 24 expands outward, which enhances the upper part of the locking shaft 8 to engage with the upper chuck 2.

[0036] The system also includes a connecting wire 25. The outer casing 5 is provided with a first outer wire hole 26 and a second outer wire hole 27. The spool 4 is provided with a first inner wire hole 28 and a second inner wire hole 29. The support frame 6 is provided with a first limiting hole 30, a second limiting hole 31 and a third limiting hole 32. The middle part of the connecting wire 25 passes through the first limiting hole 30 and the second limiting hole 31. The end of the connecting wire 25 passes through the third limiting hole 32, the first outer wire hole 26, the first inner wire hole 28 and the second inner wire hole 29 in sequence and is then snapped onto the spool 4. During the wire pulling process, the end of the connecting wire 25 emerges from the second inner wire hole 29, appears through the second outer wire hole 27, and is knotted to prevent the connecting wire 25 from detaching from the wire pulley 4.

[0037] The support frame 6 has a nail body 33 on its outer side. The nail body 33 has a slot 34 in the middle and a fixing position 35 on its nail body 33. The support frame 6 has two nail bodies 33 on each side. The connecting wire 25 passes through the slot 34. The slot 34 serves to fix the connecting wire 35 and separate the connecting wire 35. The connecting wire 25 can be inserted into the slot 34 with both wires (serving as a guide passage for the connecting wire 25), or the end of the connecting wire 25 can be inserted into the slot 34 (single-sided force). The nail body 33 can fix the support frame 6 to the helmet through the fixing position 35, realizing the DIY function.

[0038] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles applied thereto. Within the scope of the technology disclosed in this utility model, any variations or substitutions that are easily conceived by those skilled in the art should be covered within the protection scope of this utility model.

Claims

1. A helmet headform quick adjustment system, characterized by, The device includes a top cover, an upper chuck, a lower chuck, a reel, a housing, and a support frame. A base plate is fixed to the middle of the housing, and a locking shaft is integrally formed in the middle of the base plate. The reel is located inside the housing. The lower end of the lower chuck is engaged with the reel, and a spring connects the lower chuck and the reel. A lower locking block is formed around the upper end of the lower chuck, and an upper locking block is formed around the lower end of the upper chuck. The upper and lower locking blocks are engaged with each other. The locking shaft passes through the middle of the reel and the middle of the lower chuck in sequence and then engages with the middle of the upper chuck. A return stop is installed on the upper chuck. Teeth are provided on the inner side of the upper end of the housing, and the return stop elastically contacts the teeth. The top cover is engaged with the upper chuck, and the housing is engaged with the middle of the support frame. A mounting pin is provided at the upper end of the support frame.

2. The helmet headform quick adjustment system of claim 1, wherein, The outer side of the top cover is provided with anti-slip texture.

3. The helmet headform quick adjustment system of claim 1, wherein, The lower outer side of the top cover is provided with an inner buckle, and the upper side of the outer shell is provided with an outer buckle, with the inner buckle fastened to the lower end of the outer buckle.

4. The helmet headform quick adjustment system of claim 1, wherein, The top cover is provided with a first card seat and a second card seat inside. The outer side of the return stop is elastically provided with a first card strip. The first card strip swings on the upper chuck. One side of the first card seat presses against the outer side of the first card strip, and the other side of the first card seat abuts against the outer edge of the upper chuck. The outer side of the upper chuck is elastically formed with a second card strip. The second card strip and the middle of the upper chuck are provided with a movable groove, and the second card seat moves within the movable groove.

5. The helmet headform quick adjustment system of claim 1, wherein, The upper block has a first vertical surface and a first arc-shaped inclined surface on its two sides, and the lower block has a second vertical surface and a second arc-shaped inclined surface on its two sides. The first vertical surface and the second vertical surface are in contact with each other, and the first arc-shaped inclined surface and the second arc-shaped inclined surface are in contact with each other.

6. The helmet headform quick adjustment system of claim 1, wherein, The lower end of the lower chuck is formed with a buckle, and the inner side of the reel is provided with a slot, and the buckle is fastened into the slot.

7. The helmet headform quick adjustment system of claim 1, wherein, The base plate has a plurality of alignment holes arranged in a ring, and the lower end of the reel has a plurality of alignment protrusions that engage with the alignment holes.

8. The helmet headform quick adjustment system of claim 1, wherein, The slotting shaft has a cavity inside, and a magazine is placed inside the cavity, with the magazine extending outwards.

9. The helmet headform quick adjustment system of claim 1, wherein, The device includes a connecting wire, a first outer wire hole and a second outer wire hole on the outer casing, a first inner wire hole and a second inner wire hole on the reel, a first limiting hole, a second limiting hole and a third limiting hole on the support frame, the middle part of the connecting wire passes through the first limiting hole and the second limiting hole, and the end of the connecting wire passes through the third limiting hole, the first outer wire hole, the first inner wire hole and the second inner wire hole in sequence and is then snapped onto the reel.

10. The helmet headform quick adjustment system of claim 9, wherein, The support frame has a nail body on its outer side, and a slot is opened in the middle of the nail body. The connecting line passes through the slot, and a fixing position is provided on the nail body. The support frame has two nail bodies on each side.

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