A sports helmet with convenient size adjustment

Abstract

The application discloses a sports helmet with convenient size adjustment, which comprises a rear cap shell, a front cap shell capable of moving forward and backward relative to the rear cap shell is arranged in the rear cap shell, accommodating grooves are arranged on both sides of the rear cap shell, and extension connecting parts are arranged at positions corresponding to the accommodating grooves of the front cap shell, characterized in that a waist-shaped slot hole is arranged on the extension connecting part, an adjusting rack is arranged in the waist-shaped slot hole, the adjusting rack is fixed on both sides of the waist-shaped slot hole, adjusting seats corresponding to the waist-shaped slot hole are arranged on the rear cap shell, the adjusting seats are arranged in the waist-shaped slot hole, the adjusting rack is arranged in the adjusting seat, a driving mechanism capable of driving the adjusting rack to move step by step is arranged in the adjusting seat, and a locking mechanism capable of locking the adjusting rack is arranged in the adjusting seat. The application has the advantages of simple structure, convenient adjustment, step-by-step adjustment and effective locking after adjustment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of helmets, in particular to a sports helmet with convenient size adjustment. BACKGROUND

[0002] Ice hockey is a fast-paced and physically demanding sport, and therefore also has a certain degree of danger. In such an environment, head protection is particularly critical. For ice hockey players, concussions are one of the biggest threats. Therefore, it is crucial to choose the right helmet, only in this way can the head be effectively protected and head injuries can be prevented. A helmet that is not the right size not only cannot provide adequate protection, but may even be more dangerous than not wearing a helmet. A helmet that is too small will put pressure on the head when blood supply to the head increases after warming up, causing head pain and discomfort, and in severe cases may even cause nausea and fainting. A helmet that is too large not only affects the player's vision, but also may be unstable during intense activity, deviating or sliding abnormally, not only failing to provide effective protection, but also causing serious injury to the neck and collarbone, especially for teenagers and children.

[0003] Chinese utility model patent publication No. CN218073693U discloses a helmet with adjustable head size, comprising: a cap shell body, the cap shell body includes a front cap shell and a rear cap shell; two sides of the outer part of the front cap shell are provided with flaps, one end of the flap is fixedly connected with the front cap shell, the other end of the flap is provided with a clamping block, the rear cap shell is provided with a clamping groove, and the clamping groove is provided with a clamping opening portion matched with the clamping block along the length direction. By arranging the clamping opening portion in the clamping groove, the clamping block can cooperate with the clamping opening portion, so that the clamping block can be positioned and limited in the clamping opening portion, thereby achieving the purpose of adjusting the size of the helmet.

[0004] The above patent document introduces a design that can be adjusted in the length direction of the helmet. However, the structure is relatively complex and the adjustment is not convenient.

[0005] Therefore, the existing sports helmet with adjustable size needs to be further improved. SUMMARY

[0006] The purpose of the present application is to overcome the deficiencies in the prior art, and to provide a sports helmet with simple structure, convenient adjustment, step-by-step adjustment, and effective locking after adjustment.

[0007] In order to achieve the above-mentioned purposes, the present application adopts the following scheme for the sports helmet with convenient size adjustment. The sports helmet with convenient size adjustment comprises a rear cap shell, a front cap shell movably arranged in the rear cap shell, and a receiving groove arranged on each side of the rear cap shell. An extension connecting part is arranged on the front cap shell and the receiving groove. A waist-shaped slot hole is arranged on the extension connecting part. An adjustment rack is arranged in the waist-shaped slot hole. The adjustment rack is fixed on both sides of the waist-shaped slot hole. An adjustment seat is arranged on the rear cap shell and the waist-shaped slot hole. The adjustment seat is arranged in the waist-shaped slot hole. The adjustment rack is arranged in the adjustment seat. A driving mechanism is arranged in the adjustment seat. The driving mechanism can drive the adjustment rack to move in steps. A locking mechanism is arranged in the adjustment seat. The locking mechanism can lock the adjustment rack.

[0008] As another improvement of the sports helmet with convenient size adjustment, the adjustment rack comprises a rack body. A long groove is arranged in the upper end surface of the rack body along the length direction. A plurality of one-way teeth are uniformly arranged in the long groove.

[0009] As another improvement of the sports helmet with convenient size adjustment, the driving mechanism comprises a first shaft seat symmetrically arranged on one side of the upper end of the adjustment seat. A waist-shaped inclined hole is arranged in the first shaft seat. The angle between the axis of the waist-shaped inclined hole and the movement direction of the adjustment rack is an acute angle. A first hinge shaft is arranged in the waist-shaped inclined hole. A first hinge seat is movably arranged in the first hinge shaft. A driving wrench is arranged on the side of the first hinge seat pointing to the movement direction of the adjustment rack. A driving piece is arranged on the other side of the first hinge seat opposite to the driving wrench. When the driving wrench is turned over, the driving piece can drive the one-way teeth to move in steps. A first torsion spring is arranged between the first hinge seat and the adjustment seat. The first torsion spring can drive the driving piece and the one-way teeth to separate from each other. A hollow slot hole is arranged in the middle of the driving wrench. When the driving piece and the one-way teeth completely separate from each other, the locking mechanism is arranged in the hollow slot hole.

[0010] As another improvement of the sports helmet with convenient size adjustment, a long slot is arranged on the first hinge seat on the upper side of the dial, the long slot is in communication with the shaft hole arranged in the first hinge seat, a positioning plate is arranged on the upper side of the long slot, the first torsion spring comprises a first torsion spring body and a second torsion spring body arranged at intervals, an outward protruding limiting transverse part is arranged between the first torsion spring body and the second torsion spring body, the limiting transverse part is in abutment with the positioning plate, a first clamping rod is arranged on the end of the first torsion spring body, a first positioning seat is arranged on the inner wall of one side of the adjusting seat, the first clamping rod is in abutment with the upper end surface of the first positioning seat, a second positioning seat is arranged on the inner arm of the other side of the adjusting seat, and a second clamping rod is arranged on the end of the second torsion spring body, the second clamping rod is in abutment with the clamping groove of the second positioning seat.

[0011] As another improvement of the sports helmet with convenient size adjustment, the locking mechanism comprises a second shaft seat arranged on the upper end of the adjusting seat, a second hinge seat is hinged in the second shaft seat through a second hinge shaft, an oblique locking piece is arranged on the side of the second hinge seat opposite to the movement direction of the adjusting rack, the oblique locking piece is in abutment with the one-way tooth, a pressing head capable of driving the oblique locking piece to rotate is arranged on the second hinge seat, a containing groove is arranged on at least one side of the second hinge seat, a second torsion spring is sleeved on the outer wall of the second hinge shaft, one end of the second torsion spring is clamped in the containing groove, and the other end of the second torsion spring is in abutment with the first positioning seat on the inner wall of the adjusting seat.

[0012] As another improvement of the sports helmet with convenient size adjustment, a positioning tooth corresponding to the one-way tooth is arranged in the long groove on at least one side of the one-way tooth, a vertical through hole is arranged at the position corresponding to the positioning tooth of the adjusting seat, a positioning column is arranged in the vertical through hole, the upper end of the positioning column penetrates through the adjusting seat and is arranged on an end head, a pressing spring is sleeved on the positioning column between the end head and the adjusting seat, and a pressing seat is arranged at the position corresponding to the end head of the dial.

[0013] As another improvement of the sports helmet with convenient size adjustment, a locking mechanism capable of preventing the adjusting rack from moving to both sides is arranged between the bottom of the adjusting rack and the adjusting seat, and an unlocking mechanism capable of synchronously unlocking the locking mechanism when the locking mechanism is pressed is arranged in the adjusting seat.

[0014] As another improvement of the sports helmet with convenient size adjustment according to the application, the locking mechanism comprises a through long slot hole arranged in the middle of the adjustment rack along the axial direction, a plurality of positioning transverse slots arranged at the bottom of the adjustment rack and perpendicular to the axial direction of the adjustment rack, a clamping groove arranged on at least one side of the bottom of the adjustment rack and communicating with the positioning transverse slots, a vertical through slot arranged at the corresponding position of the adjustment seat and the actuating mechanism, a plug-in slot hole arranged on both sides of the upper part of the vertical through slot, a straight spring piece arranged in the plug-in slot hole, a clamping convex part arranged at the corresponding position of the straight spring piece and the clamping groove, the clamping convex part being clamped in the clamping groove, a connecting piece arranged at the corresponding position of the straight spring piece and the through long slot hole, the upper end of the connecting piece extending into the through long slot hole, arc-shaped spring pieces arranged on both sides of the connecting piece along the axial direction of the adjustment rack, the lower part of the arc-shaped spring pieces pressing against the inner wall of the adjustment seat, and a driving head arranged at the corresponding position of both sides of the actuating piece and the arc-shaped spring pieces.

[0015] As another improvement of the sports helmet with convenient size adjustment according to the application, the unlocking mechanism comprises an extrusion inclined plate arranged in the adjustment seat, a waist-shaped through hole arranged in the middle of the extrusion inclined plate and perpendicular to the axial direction, a connecting shaft arranged in the adjustment seat and penetrating through the waist-shaped through hole, a limiting column arranged on both sides of the lower part of the extrusion inclined plate, a third tension spring arranged between the limiting column and the connecting shaft, a first clearance slot hole arranged in the middle of the arc-shaped spring piece, a second clearance slot hole arranged in the middle of the connecting piece, the lower end of the extrusion inclined plate penetrating through the second clearance slot hole and the first clearance slot hole, a limiting rod arranged in the adjustment seat and abutting against the lower end surface of the extrusion inclined plate, and a clearance notch arranged at the corresponding position of the actuating piece and the extrusion inclined plate.

[0016] As another improvement of the sports helmet with convenient size adjustment according to the application, a hand hole is arranged on the outer side of the actuating wrench to facilitate actuation.

[0017] In summary, the application has the following advantages over the prior art: the adjustment seat is arranged on the rear cap shell, the adjustment rack is arranged in the waist-shaped slot hole of the extension connecting part, the actuating mechanism and the locking mechanism are arranged in the adjustment seat, the front cap shell can be gradually contracted to the rear cap shell by actuating the actuating mechanism, and the adjustment is convenient and fast; the locking mechanism is arranged between the bottom of the adjustment rack and the adjustment seat, the unlocking mechanism is arranged in the adjustment seat, the adjustment rack can be locked, the front cap shell and the rear cap shell are prevented from suddenly loosening during the adjustment process or the use process, the helmet is prevented from being misaligned or separated, and accidents are prevented. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1A perspective view of the present application.

[0019] Figure 2 A perspective view of the toggle mechanism and the locking mechanism in the first embodiment of the present application.

[0020] Figure 3 A perspective view of Figure 2 A partial structural view of

[0021] Figure 4 A cross-sectional view of Figure 2 A cross-sectional view of

[0022] Figure 5 A cross-sectional view of Figure 2 A cross-sectional view of

[0023] Figure 6 A perspective view of the second embodiment of the present application.

[0024] Figure 7 A cross-sectional view of Figure 6 A cross-sectional view of

[0025] Figure 8 A perspective view of the third embodiment of the present application.

[0026] Figure 9 A cross-sectional view of Figure 8 A cross-sectional view of

[0027] Figure 10 A cross-sectional view of Figure 8 A cross-sectional view of

[0028] Figure 11 An exploded view of Figure 8 An exploded view of

[0029] In the figure: 1, rear cap shell; 2, front cap shell; 3, accommodating groove; 4, extension connection; 5, waist-shaped slot hole; 6, adjusting rack; 61, rack body; 62, long groove; 63, one-way tooth; 64, back-shaped boss; 7, adjusting seat; 71, limiting protrusion; 8, pulling mechanism; 81, first shaft seat; 82, waist-shaped inclined hole; 83, first hinged shaft; 84, first hinged seat; 85, pulling wrench; 86, pulling piece; 87, first torsional spring; 871, first torsional spring body; 872, second torsional spring body; 873, limiting transverse part; 874, first clamping rod; 875, second clamping rod; 88, hollow slot hole; 9, locking mechanism; 91, second shaft seat; 92, second hinged shaft; 93, second hinged seat; 94, oblique locking piece; 95, pressing head; 96, accommodating slot hole; 97, second torsional spring; 10, positioning plate; 11, first positioning seat; 12, second positioning seat; 13, long slot; 14, positioning tooth; 15, vertical through hole; 16, positioning column; 17, end head; 18, locking mechanism; 181, through long slot hole; 182, positioning transverse slot; 183, clamping groove; 184, vertical through slot; 185, insertion slot hole; 186, straight elastic piece; 187, clamping protrusion; 188, connecting piece; 189, arc-shaped elastic piece; 1810, driving head; 19, unlocking mechanism; 191, extrusion inclined plate; 192, waist-shaped through hole; 193, connecting shaft; 194, limiting column; 195, third tension spring; 196, first allowance slot hole; 197, second allowance slot hole; 198, limiting rod; 199, allowance slot; 1910, matching inclined surface; 20, hand hole; 21, top pressing spring; 22, extrusion seat. DETAILED DESCRIPTION

[0030] The above and other technical features and advantages of the present application will be more apparent from the following description in conjunction with the accompanying drawings.

[0031] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0032] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship terms based on the direction or positional relationship shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] Moreover, it needs to be explained that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] As shown in Figures 1-11 A sports helmet with convenient size adjustment, comprising a rear cap shell 1, a front cap shell 2 capable of moving forward and backward relative to the rear cap shell 1 is arranged in the rear cap shell 1, a containing groove 3 is arranged on both sides of the rear cap shell 1 respectively, an extension connection part 4 is arranged at the corresponding position of the front cap shell 2 and the containing groove 3, a waist-shaped slot hole 5 is arranged on the extension connection part 4, an adjustment rack 6 is arranged in the waist-shaped slot hole 5, the two ends of the adjustment rack 6 are fixed on both sides of the waist-shaped slot hole 5 respectively, an adjustment seat 7 is arranged at the corresponding position of the rear cap shell 1 and the waist-shaped slot hole 5, the adjustment seat 7 is arranged in the waist-shaped slot hole 5, the adjustment rack 6 is arranged in the adjustment seat 7, a driving mechanism 8 capable of driving the adjustment rack 6 to move step by step is arranged in the adjustment seat 7, and a locking mechanism 9 capable of locking the adjustment rack 6 is arranged in the adjustment seat 7. When the size of the sports helmet needs to be adjusted, the locking mechanism 9 can be pressed to be unlocked first. At this time, the front cap shell 2 and the rear cap shell 1 can be moved in opposite directions relative to each other, so that the size between the front cap shell 2 and the rear cap shell 1 is adjusted to be larger, and the locking mechanism 9 is released. The front cap shell 2 and the rear cap shell 1 cannot move in opposite directions relative to each other. After the user wears it, the adjustment rack 6 can be driven to move step by step in the adjustment seat 7 by driving the driving mechanism 8, so that the front cap shell 2 and the rear cap shell 1 move in the same direction relative to each other, the size is gradually reduced, and the size is adjusted to the size suitable for the user. During the process that the front cap shell 2 and the rear cap shell 1 move in the same direction relative to each other, the locking mechanism 9 will jump with the step-by-step movement of the adjustment rack 6, so as to constantly switch between unlocking and locking, and make a click sound, which is convenient for the user to adjust. The present application has the advantages of simple structure and convenient and fast adjustment. In the present application, the middle part of the adjustment rack 6 is separated from the waist-shaped slot hole 5, and the adjustment rack 6 can be a hard rack or a soft rack.

[0035] Referring to Figures 1-5 , the adjustment rack 6 comprises a rack body 61, a long groove 62 is arranged in the length direction of the upper end surface of the rack body 61, and a plurality of one-way teeth 63 are uniformly distributed in the long groove 62. Under the action of the locking mechanism 9, the driving mechanism 8 can only drive the adjustment rack 6 to move in one direction.

[0036] The knob mechanism 8 comprises a first shaft seat 81 symmetrically arranged on one side of the upper end of the adjusting seat 7, a waist-shaped inclined hole 82 is arranged in the first shaft seat 81, the angle between the axis of the waist-shaped inclined hole 82 and the movement direction of the adjusting rack 6 is an acute angle, a first hinged shaft 83 is arranged in the waist-shaped inclined hole 82, a first hinged seat 84 is movably arranged in the first hinged shaft 83, a knob wrench 85 is arranged on the side of the first hinged seat 84 which points to the movement direction of the adjusting rack 6, a knob piece 86 which can stepwise move the one-way tooth 63 when the knob wrench 85 is turned over is arranged on the other side of the first hinged seat 84 opposite to the knob wrench 85, a first torsion spring 87 which can drive the knob piece 86 and the one-way tooth 63 to separate from each other is arranged between the first hinged seat 84 and the adjusting seat 7, a hollow slot hole 88 is arranged in the middle of the knob wrench 85, and the locking mechanism 9 is arranged in the hollow slot hole 88 when the knob piece 86 and the one-way tooth 63 completely separate from each other.

[0037] In the initial state of the present application, the knob wrench 85 is buckled on the adjusting seat 7 on one side of the locking mechanism 9 under the action of the first torsion spring 87, at this time, the knob piece 86 and the one-way tooth 63 completely separate from each other; when adjustment is needed, the user only needs to move the knob wrench 85 with hand to make it rotate outward around the first hinged shaft 83, and the knob piece 86 can be synchronously rotated; under the action of the waist-shaped inclined hole 82, the first hinged shaft 83 will move downward with the first hinged seat 84 during the rotation of the knob wrench 85, so that the knob piece 86 can move the one-way tooth 63 in the adjusting rack 6 to move step by step. By arranging the waist-shaped inclined hole 82, the knob piece 86 can be shorter, so that the knob piece 86 will not be broken during the moving process.

[0038] The first hinge seat 84 on the upper side of the dial 86 is provided with a long slot 13 which is in communication with the shaft hole arranged in the first hinge seat 84, and a positioning plate 10 is arranged on the upper side of the long slot 13. The first torsion spring 87 comprises a first torsion spring body 871 and a second torsion spring body 872 which are arranged at intervals, and a limiting horizontal part 873 which is outwardly protruded and arranged between the first torsion spring body 871 and the second torsion spring body 872. The limiting horizontal part 873 is in abutment with the positioning plate 10. A first clamping rod 874 is arranged on the end of the first torsion spring body 871. A first positioning seat 11 is arranged on the inner wall of one side of the adjusting seat 7. The first clamping rod 874 is in abutment with the upper end surface of the first positioning seat 11. A second positioning seat 12 is arranged on the inner arm of the other side of the adjusting seat 7. A second clamping rod 875 is arranged on the end of the second torsion spring body 872. The second clamping rod 875 is in abutment with the clamping groove of the second positioning seat 12. The first hinge seat 84 is in a C-shaped body in the present application. The long slot 13 is arranged on one side of the C-shaped body. The dial 86 is arranged on the lower side of the long slot 13 and is inclined downward. The positioning plate 10 is arranged on the upper side of the long slot 13. The long slot 13 facilitates the assembly of the first torsion spring 87.

[0039] The locking mechanism 9 comprises a second shaft seat 91 arranged on the upper end of the adjusting seat 7. A second hinge seat 93 is hingedly arranged in the second shaft seat 91 through a second hinge shaft 92. An oblique locking piece 94 is arranged on the side of the second hinge seat 93 which is opposite to the movement direction of the adjusting rack 6. The oblique locking piece 94 is in abutment with the one-way tooth 63. A pressing head 95 is arranged on the second hinge seat 93 and can drive the oblique locking piece 94 to rotate. A containing groove 96 is arranged on at least one side of the second hinge seat 93. A second torsion spring 97 is sleeved on the outer wall of the second hinge shaft 92. One end of the second torsion spring 97 is clamped in the containing groove 96. The other end of the second torsion spring 97 is in abutment with the first positioning seat 11 of the inner wall of the adjusting seat 7. The one-way tooth has a vertical straight surface and an inclined surface in the present application. Under the action of the second torsion spring 97, the lower end of the oblique locking piece 94 is in abutment with the lower part of the inclined surface and the lower part of the vertical straight surface, so that the adjusting rack 6 can only move in one direction. When the adjusting rack 6 moves in the other direction, the lower end of the oblique locking piece 94 moves along the inclined surface, so that the oblique locking piece 94 is forced to rotate, thereby unlocking the oblique locking piece 94 and the one-way tooth 63. In the present application, the oblique locking piece 94 can be separated from the adjusting rack 6 by pressing the pressing head 95. At this time, the front cap shell 2 and the rear cap shell 1 can be adjusted at will.

[0040] Referring to Figures 6-7The second embodiment of the present application is based on the first embodiment, and additionally, a positioning tooth 14 corresponding to the one-way tooth 63 is arranged in the long groove 62 on at least one side of the one-way tooth 63, a vertical through hole 15 is arranged at a position corresponding to the positioning tooth 14 on the adjusting seat 7, a positioning column 16 is arranged in the vertical through hole 15, the upper end of the positioning column 16 penetrates through the adjusting seat 7 and is arranged at an end head 17, a pressing spring 21 is arranged outside the positioning column 16 between the end head 17 and the adjusting seat 7, and a pressing seat 22 is arranged at a position corresponding to the end head 17 on the turning wrench 85.

[0041] When the turning wrench 85 is folded on the adjusting seat 7 in the present application, the pressing seat is pressed on the end head 17, so that the positioning column 16 is inserted between the positioning teeth 14. The pressing seat of the turning wrench 85, the positioning column 16 and the pressing spring are matched with each other, so that the adjusting rack 6 can be effectively locked, reverse movement is prevented, the front cap shell 2 and the rear cap shell 1 can be relatively locked, and relative displacement will not occur even if front side collision or rear side collision occurs. The safety performance of the whole is greatly improved.

[0042] Referring to Figures 8-11 The third embodiment of the present application can be based on the first embodiment or the second embodiment, and additionally, a locking mechanism 18 preventing the adjusting rack 6 from moving to both sides is arranged between the bottom of the adjusting rack 6 and the adjusting seat 7, and an unlocking mechanism 19 is arranged in the adjusting seat 7 and can synchronously unlock the locking mechanism 18 when the locking mechanism 9 is pressed. In the present application, the adjusting rack 6 can be effectively locked in the adjusting seat 7 through the locking mechanism 18, so that double locking is realized, and the safety performance of the sports helmet is further improved. In addition, the locking mechanism 18 can also prevent the locking mechanism 9 from being pressed by mistake and causing the adjusting rack to be completely unlocked.

[0043] The locking mechanism 18 comprises a through long slot hole 181 arranged in the middle of the adjusting rack 6 along the axial direction, a plurality of positioning horizontal slots 182 arranged at the bottom of the adjusting rack 6 and spaced uniformly and perpendicularly to the axial direction of the adjusting rack 6, a clamping groove 183 arranged at the bottom of the adjusting rack 6 on at least one side of the through long slot hole 181, the clamping groove 183 and the positioning horizontal slot 182 being in communication with each other, a vertical through slot 184 arranged at the corresponding position of the adjusting seat 7 and the actuating mechanism 8, an insertion slot hole 185 arranged at the upper two sides of the vertical through slot 184, a straight spring 186 arranged in the insertion slot hole 185, a clamping convex part 187 arranged at the corresponding position of the straight spring 186 and the clamping groove 183, the clamping convex part 187 being clamped in the clamping groove 183, a connecting piece 188 arranged at the corresponding position of the straight spring 186 and the through long slot hole 181, the upper end of the connecting piece 188 extending into the through long slot hole 181, arc-shaped springs 189 arranged symmetrically on the two sides of the connecting piece 188 along the axial direction of the adjusting rack 6, the lower part of the arc-shaped spring 189 being pressed against the inner wall of the adjusting seat 7, and a driving head 1810 arranged at the corresponding position of the arc-shaped spring 189 and the two sides of the actuating piece 86.

[0044] In the present application, the straight spring 186 is inserted into the insertion slot hole 185 on the two sides of the adjusting seat 7, the vertically arranged connecting piece 188 and the arc-shaped spring 189 pass through the through long slot hole 181 and protrude from the bottom of the inner wall of the adjusting seat 7, the upper end of the arc-shaped spring 189 is substantially flush with the upper end of the one-way tooth 63, and can be slightly higher or slightly lower than the upper end of the arc-shaped spring 189 by 0.1 cm. When the actuating wrench 85 is turned under force, the driving head 1810 on the lower side of the actuating piece 86 first presses the arc-shaped spring 189, drives the connecting piece 188 to move downward with the straight spring 186, and the clamping convex part 187 is separated from the clamping groove 183. At this time, the locking mechanism 18 is released, but the locking mechanism 9 still functions, the actuating piece 86 actuates the one-way tooth 63 to move, so that the adjusting rack 6 can only move one-way relative to the adjusting seat 7 by one position of the one-way tooth 63. When the driving head 1810 on the lower side of the actuating piece 86 passes the upper end of the arc-shaped spring 189, the arc-shaped spring 189 drives the connecting piece 188 and the straight spring 186 to move upward, the clamping convex part 187 is clamped into the clamping groove 183 on the rear side, and the adjusting process always effectively locks the adjusting rack 6. When the actuating wrench 85 is released, the driving head 1810 on the upper side of the actuating piece 86 drives the arc-shaped spring 189, the connecting piece 188 and the straight spring 186 to move downward in the opposite direction, the locking mechanism 18 is unlocked, but the locking mechanism 9 still functions, effectively preventing the front cap shell 2 and the rear cap shell 1 from being suddenly released, preventing the helmet from being misaligned or separated, and preventing accidents from happening.

[0045] The unlocking mechanism 19 comprises a pressing inclined plate 191 arranged in the adjusting seat 7, a waist-shaped through hole 192 is arranged in the middle of the pressing inclined plate 191 along the direction perpendicular to the axis, a connecting shaft 193 is arranged in the adjusting seat 7, the connecting shaft 193 is arranged in the waist-shaped through hole 192, limiting columns 194 are arranged at the lower sides of the pressing inclined plate 191, third tension springs 195 are arranged between the limiting columns 194 and the connecting shaft 193, a first accommodating slot hole 196 is arranged in the middle of the arc-shaped elastic sheet 189, second accommodating slot holes 197 are arranged in the middle of the connecting sheets 188, the lower end of the pressing inclined plate 191 is arranged in the second accommodating slot holes 197 and the first accommodating slot hole 196, a limiting rod 198 is arranged in the adjusting seat 7, the lower end surface of the pressing inclined plate 191 abuts against the limiting rod 198, and accommodating slot gaps 199 are arranged at the corresponding positions of the pressing inclined plate 191 and the pressing handle 95.

[0046] The upper end of the pressing inclined plate 191 is provided with a matching inclined surface 1910, when the pressing handle 95 is pressed for a distance, the inclined surface of the pressing handle 95 abuts against the matching inclined surface 1910, so that the pressing inclined plate 191 is pressed to move obliquely downwards, the bottom surface of the pressing inclined plate 191 presses the connecting sheets 188 at the bottom of the second accommodating slot holes 197, drives the connecting sheets 188 to move downwards, so that the clamping convex parts 187 are separated from the clamping grooves 183, at this time, the oblique locking pieces 94 are separated from the one-way teeth 63, the locking mechanism 18 is unlocked at the same time, and the adjusting rack 6 can freely move relative to the adjusting seat 7. The height of the first accommodating slot hole 196 is greater than the vertical height of the pressing inclined plate 191 in the first accommodating slot hole 196, so that the arc-shaped elastic sheet 189 can be elastically deformed smoothly.

[0047] The hand hole 20 is arranged on the outer side of the pressing wrench 85, which is convenient for the user to hook the fingers to the pressing wrench 85.

[0048] The adjusting seat 7 is a U-shaped seat, and the limiting convex parts 71 are arranged on the inner side of the opening end of the U-shaped seat, the two sides of the adjusting rack 6 abut against the two side walls of the U-shaped seat, so that the movement of the adjusting rack 6 is more stable.

[0049] The basic principle and main features of the present application and the advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A sports helmet with adjustable size, comprising a rear cap shell (1), a front cap shell (2) movable relative to the rear cap shell (1) within the rear cap shell (1), receiving grooves (3) on both sides of the rear cap shell (1), and an extended connecting portion (4) at a corresponding position on the front cap shell (2) and the receiving grooves (3), characterized in that: A waist-shaped slot hole (5) is arranged on the epitaxial connection part (4), an adjusting rack (6) is arranged in the waist-shaped slot hole (5), the two ends of the adjusting rack (6) are fixed on the two sides of the waist-shaped slot hole (5) respectively, an adjusting seat (7) is arranged on the rear cap shell (1) and the waist-shaped slot hole (5) at the corresponding position, the adjusting seat (7) is arranged in the waist-shaped slot hole (5), the adjusting rack (6) is arranged in the adjusting seat (7), a driving mechanism (8) is arranged in the adjusting seat (7) and can drive the adjusting rack (6) to move by a step, a locking mechanism (9) is arranged in the adjusting seat (7) and can lock the adjusting rack (6); The adjusting rack (6) comprises a rack body (61), a long recess (62) is arranged in the length direction on the upper end surface of the rack body (61), and a plurality of one-way teeth (63) are uniformly arranged in the long recess (62); The driving mechanism (8) comprises a first shaft seat (81) which is symmetrically arranged on one side of the upper end of the adjusting seat (7), a waist-shaped inclined hole (82) is arranged in the first shaft seat (81), the angle between the axis of the waist-shaped inclined hole (82) and the movement direction of the adjusting rack (6) is an acute angle, a first hinge shaft (83) is arranged in the waist-shaped inclined hole (82), a first hinge seat (84) is movably arranged in the first hinge shaft (83), a driving wrench (85) is arranged on the side of the first hinge seat (84) which points to the movement direction of the adjusting rack (6), a driving piece (86) which can drive the one-way teeth (63) to move by a step when the driving wrench (85) is turned over is arranged on the other side of the first hinge seat (84) opposite to the driving wrench (85), a first torsional spring (87) is arranged between the first hinge seat (84) and the adjusting seat (7) and can drive the driving piece (86) and the one-way teeth (63) to separate from each other, a hollow slot hole (88) is arranged in the middle of the driving wrench (85), and the locking mechanism (9) is arranged in the hollow slot hole (88) when the driving piece (86) and the one-way teeth (63) are completely separated from each other; The locking mechanism (9) comprises a second shaft seat (91) arranged on the upper end of the adjusting seat (7), a second hinge seat (93) is hingedly connected to the second shaft seat (91) through a second hinge shaft (92), an inclined locking piece (94) is arranged on the side of the second hinge seat (93) opposite to the movement direction of the adjusting rack (6), the inclined locking piece (94) presses on the one-way teeth (63), a pressing head (95) which can drive the inclined locking piece (94) to rotate is arranged on the second hinge seat (93), a containing slot hole (96) is arranged on at least one side of the second hinge seat (93), a second torsional spring (97) is sleeved on the outer wall of the second hinge shaft (92), one end of the second torsional spring (97) is clamped in the containing slot hole (96), and the other end of the second torsional spring (97) presses on a first positioning seat (11) in the inner wall of the adjusting seat (7).

2. A size adjustable sports helmet according to claim 1, wherein: The first hinge seat (84) on the upper side of the dial piece (86) is provided with a long slot (13) which communicates with the shaft hole provided in the first hinge seat (84), and a positioning plate (10) is provided on the upper side of the long slot (13), the first torsion spring (87) comprises a first torsion spring body (871) and a second torsion spring body (872) which are arranged at intervals, an outward protruding limiting transverse portion (873) is arranged between the first torsion spring body (871) and the second torsion spring body (872), the limiting transverse portion (873) is in abutment with the positioning plate (10), a first clamping rod (874) is arranged on the end of the first torsion spring body (871), a first positioning seat (11) is arranged on the inner wall of one side of the adjusting seat (7), the first clamping rod (874) is in abutment with the upper end face of the first positioning seat (11), a second positioning seat (12) is arranged on the inner wall of the other side of the adjusting seat (7), and a second clamping rod (875) is arranged on the end of the second torsion spring body (872), the second clamping rod (875) is in abutment with the clamping groove of the second positioning seat (12).

3. The size adjustable sports helmet of claim 2, wherein: The long groove (62) on at least one side of the one-way tooth (63) is provided with a positioning tooth (14) corresponding to the one-way tooth (63), a vertical through hole (15) is arranged at the corresponding position of the adjusting seat (7) and the positioning tooth (14), a positioning column (16) is arranged in the vertical through hole (15), the upper end of the positioning column (16) penetrates through the adjusting seat (7) and is provided with an end head (17), a pressing spring (21) is arranged on the positioning column (16) between the end head (17) and the adjusting seat (7), and a pressing seat (22) is arranged at the corresponding position of the dialing wrench (85) and the end head (17).

4. A size adjustable sports helmet according to claim 1, wherein: The adjusting rack (6) is provided with a locking mechanism (18) between the bottom and the adjusting seat (7) which can prevent the adjusting rack (6) from moving to both sides, and the adjusting seat (7) is provided with an unlocking mechanism (19) which can simultaneously unlock the locking mechanism (18) when the locking mechanism (9) is pressed.

5. A size adjustable sports helmet according to claim 4, wherein: The locking mechanism (18) comprises a through long slot hole (181) arranged in the middle of the adjusting rack (6) along the axial direction, a plurality of positioning transverse slots (182) arranged at intervals on the bottom of the adjusting rack (6) and perpendicular to the axial direction of the adjusting rack (6), a clamping groove (183) arranged on the bottom of the adjusting rack (6) on at least one side of the through long slot hole (181), the clamping groove (183) and the positioning transverse slot (182) being in communication with each other, a vertical through slot (184) arranged at the corresponding position of the adjusting seat (7) and the actuating mechanism (8), an insertion slot hole (185) arranged on both sides of the upper part of the vertical through slot (184), a straight elastic piece (186) arranged in the insertion slot hole (185), a clamping convex part (187) arranged at the corresponding position of the straight elastic piece (186) and the clamping groove (183), the clamping convex part (187) being clamped in the clamping groove (183), a connecting piece (188) arranged at the corresponding position of the straight elastic piece (186) and the through long slot hole (181), the upper end of the connecting piece (188) extending into the through long slot hole (181), an arc-shaped elastic piece (189) arranged on both sides of the connecting piece (188) along the axial direction of the adjusting rack (6), the lower part of the arc-shaped elastic piece (189) being pressed against the inner wall of the adjusting seat (7), and a driving head (1810) arranged at the corresponding position of both sides of the actuating piece (86) and the arc-shaped elastic piece (189).

6. A size adjustable sports helmet according to claim 5, wherein: The unlocking mechanism (19) comprises an extrusion inclined plate (191) arranged in the adjusting seat (7), a waist-shaped through hole (192) arranged in the middle of the extrusion inclined plate (191) and perpendicular to the axial direction, a connecting shaft (193) arranged in the adjusting seat (7) and penetrating the waist-shaped through hole (192), a limiting column (194) arranged on both sides of the lower part of the extrusion inclined plate (191), a third tension spring (195) arranged between the limiting column (194) and the connecting shaft (193), a first clearance slot hole (196) arranged in the middle of the arc-shaped elastic piece (189), a second clearance slot hole (197) arranged in the middle of the connecting piece (188), the lower end of the extrusion inclined plate (191) penetrating the second clearance slot hole (197) and the first clearance slot hole (196), a limiting rod (198) arranged in the adjusting seat (7), the lower end surface of the extrusion inclined plate (191) abutting against the limiting rod (198), and a clearance notch (199) arranged at the corresponding position of the actuating piece (86) and the extrusion inclined plate (191).

7. A size adjustable sports helmet according to claim 1, wherein: A hand hole (20) is arranged on the outer side of the actuating wrench (85) to facilitate actuation.

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