Folding helmet

Abstract

The utility model belongs to the technical field of helmets, and particularly relates to a folding helmet which comprises a helmet body and a helmet cover which can be folded relatively, an inner cavity penetrating through the upper side and the lower side of the helmet body is formed in the helmet body, the helmet cover can be installed on the helmet body and covers the upper end of the inner cavity, and a connecting rod is arranged on the side face of the helmet body. The connecting rod is rotationally connected with the helmet body and the helmet cover, a first locking piece is movably arranged on the helmet body or the helmet cover, and the first locking piece can control the helmet cover to be fixed to the upper end of the helmet body; the helmet cover can be overturned towards the lower end of the helmet main body through the connecting rod, the upper end of the helmet cover penetrates into the inner cavity from the lower end of the inner cavity, a second locking piece is movably arranged on the helmet main body or the helmet cover, and the second locking piece can control the helmet cover to be stored at the lower end of the helmet main body; the folding helmet is simple in structure, convenient to unfold and fold and small in size after being folded.

Description

Technical Field

[0001] This utility model belongs to the field of helmets, and specifically relates to a folding helmet. Background Technology

[0002] A helmet is a device to protect the head and is an indispensable tool when riding electric bikes and motorcycles. For the safety of the user, the user needs to wear a helmet at all times while riding.

[0003] Traditional helmets mostly consist of a one-piece shell with an inner cavity for installing the liner and housing the user's head. However, these helmets are relatively large in size, and the raised top makes them inconvenient to store and transport. To solve these problems, some people have invented foldable helmets, such as the flip-up folding helmet disclosed in Chinese utility model patent CN 202020920962.X, which includes a helmet body and a helmet cover that covers the upper part of the helmet body. The raised surface of the helmet cover faces upward, the front end of the helmet cover is rotatably engaged with the helmet body, and the rear end is detachably engaged with the helmet body. When the helmet is in the storage state, the raised surface of the helmet cover faces downward and is fastened into the middle cavity of the helmet body.

[0004] Although the helmet canopy can be flipped and stored inside the helmet body in the above structure, reducing the volume and making it easier to store, the helmet body and helmet canopy need to be bent and separated during the folding and unfolding process, which is inconvenient for the helmet to unfold and fold quickly. In addition, the cavity in this structure gradually increases from top to bottom, which results in a small height of the raised surface penetrating into the cavity when folding, making the helmet taller after folding. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a folding helmet that is simple in structure, easy to unfold and fold, and has a small volume after folding.

[0006] The purpose of this utility model is achieved as follows:

[0007] A folding helmet includes a helmet body and a helmet cover that can be folded relative to each other. The helmet body has an inner cavity that runs through the upper and lower sides of the helmet body. The helmet cover can be installed on the helmet body and cover the upper end of the inner cavity. A connecting rod is provided on the side of the helmet body. The connecting rod is rotatably connected to the helmet body and the helmet cover respectively. A first locking member is movably provided on the helmet body or the helmet cover. The first locking member can control the helmet cover to be fixed at the upper end of the helmet body.

[0008] The helmet cover can be flipped towards the lower end of the helmet body via a connecting rod, and the upper end of the helmet cover can be inserted into the inner cavity from the lower end of the inner cavity. A second locking member is movably provided on the helmet body or the helmet cover, and the second locking member can control the helmet cover to be stored at the lower end of the helmet body.

[0009] The present invention is further configured such that: a first abutting wall and a second abutting wall are respectively provided on the helmet body and the helmet cover, and the helmet body and the helmet cover are connected by a first locking member, and the connecting rod can be abutted against the first abutting wall and the second abutting wall respectively to prevent the connecting rod from rotating relative to the helmet body and the helmet cover.

[0010] The present invention is further configured such that: the upper end of the helmet body is provided with a support wall and a positioning groove, and the helmet cover is provided with a third abutting wall adapted to the support wall and a positioning protrusion adapted to the positioning groove; the helmet cover is fixed to the upper end of the helmet body by the first locking member, the third abutting wall abuts against the support wall, and the positioning protrusion and the positioning groove are kept in cooperation.

[0011] The present invention is further configured such that: a pressing surface is provided in the inner cavity, the lower end of the pressing surface is inclined toward the outer periphery of the helmet body, and the upper end of the helmet cover is inserted into the inner cavity and pressed against the pressing surface.

[0012] The present invention is further configured such that: the first locking member is movably disposed on the helmet body, and the helmet body is provided with an elastic member for driving the first locking member to reset; the first locking member includes a button part and a hook part; a locking part adapted to the hook part is movably disposed on the helmet cover; the locking part can move towards the lower end of the helmet cover and cooperate with the hook part; the elastic member drives the hook part to cooperate with the locking part to prevent the hook part from accidentally disengaging from the locking part.

[0013] The present invention is further configured such that: the locking member is slidably disposed on the helmet body, the first locking member is provided with a driving surface, the driving surface is inclined to the sliding direction of the first locking member, and the snap-fit ​​part can abut against the driving surface and drive the first locking member to slide.

[0014] The present invention is further configured such that: a movable cavity is provided in the helmet cover, a second locking member is slidably disposed in the movable cavity, and a slot adapted to the second locking member is provided on the inner side wall of the cavity. The second locking member can pass through the movable cavity and cooperate with the slot, thereby so that the helmet cover is stably stored at the lower end of the helmet body.

[0015] The present invention is further configured such that: a lever is rotatably provided on the helmet cover, and a groove adapted to the lever is provided on the second locking member. The lever can drive the second locking member to slide relative to the helmet cover through the groove and cause the second locking member to pass through the movable cavity, thereby enabling the second locking member to engage with the slot.

[0016] The present invention is further configured such that: a limiting groove is provided on the helmet cover, and a limiting part adapted to the limiting groove is provided on the lever; the limiting part cooperates with the limiting groove to restrict the relative rotation between the lever and the helmet cover, and to keep the second locking member engaged with the slot.

[0017] The present invention is further configured such that: the lever is provided with a latching part that can extend toward the helmet body, the latching part can cooperate with the first locking member to fix the helmet cover relative to the helmet body, and the lever can drive the second locking member to be stored in the movable cavity; by controlling the lever to rotate, the latching part can be flipped and close toward the helmet cover.

[0018] The advantages of this utility model compared to the prior art are:

[0019] 1. In this utility model, the connecting rod always rotates and connects the helmet body and the helmet cover during the helmet unfolding and folding process, which facilitates the quick positioning, unfolding and folding of the helmet body and the helmet cover. The user can control the helmet unfolding and folding with one hand. The structure is simple and convenient for the helmet to unfold and fold. In addition, since the upper end of the helmet cover enters the inner cavity from the lower end of the inner cavity, it is beneficial to increase the depth of the upper end of the helmet cover entering the inner cavity, which is beneficial to reduce the volume of the helmet after folding and facilitates the storage and transportation of the helmet.

[0020] 2. The first and second abutting walls in this invention facilitate the stable unfolding of the helmet body and the helmet cap, preventing relative movement between the helmet body and the helmet cap during unfolding and folding, thus improving the safety and comfort of the helmet. The support wall and the third abutting wall facilitate the stable unfolding of the helmet body and the helmet cap, while the positioning protrusion and positioning groove improve the connection strength between the helmet body and the helmet cap during folding, preventing misalignment of the helmet body and the helmet cap during use, thus improving the safety of the helmet. The abutting surface helps the helmet cap to be stably stored in the inner cavity, reducing shaking of the helmet cap during storage and transportation, and facilitating the storage and transportation of the helmet cap.

[0021] 3. The elastic element in this invention facilitates a stable connection between the first locking element and the helmet cover, preventing the connection between the first locking element and the latching part from loosening during helmet use, thus improving helmet safety. The movable latching part not only facilitates the connection between the first locking element and the helmet, making it easy to unfold the helmet, but also prevents the latching part from being accidentally damaged when the helmet is folded, thus extending the service life of the helmet. The driving surface facilitates the automatic engagement of the first locking element and the automatic latching part of the helmet cover during helmet unfolding, allowing the helmet body and helmet cover to unfold quickly and making it convenient for the user.

[0022] 4. In this utility model, the slot is set on the inner cavity side wall, which is simple in structure and convenient for production and processing. Since the second locking member is slidably set in the movable cavity, it is not exposed during the helmet unfolding process, which is conducive to improving the safety of the helmet and avoiding damage to the second locking member by impact, thus extending the service life of the helmet. The setting of the lever and the slot makes it convenient for the user to control the second locking member and facilitates the user's use.

[0023] 5. The limiting part in this utility model helps the second locking part to cooperate with the slot, preventing the helmet body and helmet cover from accidentally unfolding during the movement and transportation process, and facilitating the storage and transportation of the helmet; the locking part set on the lever helps to simplify the structure of the helmet, and this structure can prevent the second locking part from passing through the movable cavity during the helmet unfolding process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model in its unfolded state;

[0025] Figure 2 This is a cross-sectional view of the present invention in its unfolded state;

[0026] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0027] Figure 4 This is a schematic diagram of the structure of this utility model in its folded state;

[0028] Figure 5 This is a cross-sectional view of the present invention in its folded state;

[0029] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle;

[0030] Figure 7 This is an exploded view of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the helmet body in this utility model;

[0032] Figure 9 This is a sectional view of the helmet body in this utility model;

[0033] Figure 10 This is a schematic diagram of the helmet cover structure in this utility model;

[0034] Figure 11 This is a sectional view of the helmet cover in this utility model;

[0035] Figure 12 This is a cross-sectional view of the connection structure between the first locking member and the elastic member in this utility model;

[0036] Figure 13 This is a schematic diagram of the connection structure of the first locking member, the lever, and the second locking member in this utility model;

[0037] Figure 14 This is a cross-sectional view of the connection structure between the lever and the second locking member in the unfolded state of this utility model;

[0038] Figure 15This is a cross-sectional view of the connection structure between the lever and the second locking member in the folded state of this utility model;

[0039] Figure 16 This is a schematic diagram of the structure of the second shell in this utility model;

[0040] Figure 17 This is a schematic diagram of the lever structure in this utility model.

[0041] The labels in the diagram mean: 1-Helmet body; 11-Inner cavity; 12-Firming surface; 13-Slot; 14-Support wall; 15-Positioning groove; 16-Pressure block; 17-First fixing groove; 18-First mating wall; 19-Fourth mating wall; 2-Helmet cover; 21-Cover body; 22-Second mounting base; 23-Third mating wall; 24-Positioning protrusion;

[0042] 25-Second abutting wall; 26-Fifth abutting wall; 211-Second fixing groove; 221-Moving cavity; 222-Sliding groove; 223-Hinge groove; 224-Limiting groove; 3-Connecting rod; 4-First locking element; 41-Button part; 42-Hook part; 43-Drive surface; 44-First limiting wall; 5-Elastic element; 51-First mounting base; 511-Mounting cavity; 512-Second limiting wall; 6-Second locking element; 61-Toggle groove; 7-Toggle lever; 71-Snap-fit ​​part; 711-Sloping surface; 72-Drive part; 73-Hinge part; 74-Limiting part. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0044] See Figures 1 to 17 As shown, a folding helmet includes a helmet body 1 and a helmet cover 2 that can be folded relative to each other. The helmet body 1 has an inner cavity 11 that runs through the upper and lower sides of the helmet body 1. The helmet cover 2 can be installed on the helmet body 1 and cover the upper end of the inner cavity 11. A connecting rod 3 is provided on the side of the helmet body 1. The connecting rod 3 is rotatably connected to the helmet body 1 and the helmet cover 2 respectively. A first locking member 4 is movably provided on the helmet body 1 or the helmet cover 2. The first locking member 4 can control the helmet cover 2 to be fixed at the upper end of the helmet body 1. The helmet cover 2 can be flipped to the lower end of the helmet body 1 through the connecting rod 3, and the upper end of the helmet cover 2 can pass into the inner cavity 11 from the lower end. A second locking member 6 is movably provided on the helmet body 1 or the helmet cover 2. The second locking member 6 can control the helmet cover 2 to be stored at the lower end of the helmet body 1.

[0045] In the above structure, the connecting rod 3 always rotates and connects the helmet body 1 and the helmet cover 2 during the helmet unfolding and folding process, which facilitates the quick positioning, unfolding and folding of the helmet body 1 and the helmet cover 2. The user can control the unfolding and folding of the helmet with one hand. The structure is simple and convenient for unfolding and folding the helmet. In addition, since the upper end of the helmet cover 2 enters the inner cavity 11 from the lower end of the inner cavity 11, it is beneficial to increase the depth of the upper end of the helmet cover 2 entering the inner cavity 11, which is beneficial to reduce the volume of the helmet after folding and facilitates the storage and transportation of the helmet.

[0046] The helmet body 1 and the helmet cover 2 described in this utility model are respectively provided with a first abutting wall 18 and a second abutting wall 25. The helmet body 1 and the helmet cover 2 are connected by a first locking member 4. The connecting rod 3 can be abutted against the first abutting wall 18 and the second abutting wall 25 respectively and prevents the connecting rod 3 from rotating relative to the helmet body 1 and the helmet cover 2. The arrangement of the first abutting wall 18 and the second abutting wall 25 is conducive to the stable unfolding of the helmet body 1 and the helmet cover 2, and avoids the influence of relative movement of the helmet body 1 and the helmet cover 2 when the helmet is unfolded, which is conducive to improving the safety and comfort of the helmet.

[0047] Preferably, the helmet body 1 and the helmet cover 2 are respectively provided with a fourth abutment wall 19 and a fifth abutment wall 26. When the helmet body 1 and the helmet cover 2 are connected by the second locking member 6, the connecting rod 3 can be pressed against the fourth abutment wall 19 and the fifth abutment wall 26 respectively to prevent the connecting rod 3 from rotating relative to the helmet body 1 and the helmet cover 2. The provision of the fourth abutment wall 19 and the fifth abutment wall 26 is conducive to the stable folding of the helmet body 1 and the helmet cover 2, and avoids the relative movement of the helmet body 1 and the helmet cover 2 when the helmet is folded, which is conducive to improving the safety and comfort of the helmet.

[0048] The helmet body 1 has a support wall 14 and a positioning groove 15 at its upper end. The helmet cover 2 has a third abutting wall 23 adapted to the support wall 14 and a positioning protrusion 24 adapted to the positioning groove 15. The helmet cover 2 is fixed to the upper end of the helmet body 1 by the first locking member 4. The third abutting wall 23 abuts against the support wall 14 and the positioning protrusion 24 is engaged with the positioning groove 15. The support wall 14 and the third abutting wall 23 are conducive to the stable unfolding of the helmet body 1 and the helmet cover 2. The positioning protrusion 24 and the positioning groove 15 are conducive to improving the connection strength of the helmet body 1 and the helmet cover 2 when unfolded, avoiding misalignment of the helmet body 1 and the helmet cover 2 during use, and improving the safety of the helmet.

[0049] In this invention, the inner cavity 11 is provided with a pressing surface 12. The lower end of the pressing surface 12 is inclined towards the outer periphery of the helmet body 1. The upper end of the helmet cover 2 is inserted into the inner cavity 11 and pressed against the pressing surface 12. The setting of the pressing surface 12 is conducive to the stable storage of the helmet cover 2 in the inner cavity 11, reducing the shaking of the helmet cover 2 during storage and transportation, and facilitating the storage and transportation of the helmet cover 2.

[0050] The first locking member 4 is movably mounted on the helmet body 1, and the helmet body 1 is provided with an elastic member 5 for driving the first locking member 4 to reset. The first locking member 4 includes a button part 41 and a hook part 42. The helmet cover 2 is movably provided with a locking part 71 adapted to the hook part 42. The locking part 71 can move towards the lower end of the helmet cover 2 and cooperate with the hook part 42. The elastic member 5 drives the hook part 42 to maintain cooperation with the locking part 71 to prevent the hook part 42 from accidentally disengaging from the locking part 71. The setting of the elastic member 5 is conducive to the stable connection between the first locking member 4 and the helmet cover 2, and prevents the connection between the first locking member 4 and the locking part 71 from loosening during the use of the helmet, which is conducive to improving the safety of the helmet. The movable hook part 42 not only facilitates the connection between the first locking member 4 and the helmet and makes it convenient for the helmet to unfold, but also prevents the hook part 42 from being accidentally damaged when the helmet is folded, which is conducive to extending the service life of the helmet.

[0051] In this embodiment, the helmet body 1 is provided with a first fixing groove 17, and a first mounting seat 51 is provided in the first fixing groove 17. The pressure block 16 presses the first mounting seat 51 against the first fixing groove 17, thereby fixing the first mounting seat 51 to the helmet body 1. The first mounting seat 51 is provided with a mounting cavity 511. The elastic member 5 and the first locking member 4 are both provided in the mounting cavity 511. The mounting cavity 511 is provided with a second limiting wall 512. The first locking member 4 is provided with a first limiting wall 44. The first limiting wall 44 can abut against the second limiting wall 512 and prevent the first locking member 4 from disengaging from the first mounting seat 51.

[0052] The locking element is slidably mounted on the helmet body 1. The first locking element 4 is provided with a driving surface 43. The driving surface 43 is inclined to the sliding direction of the first locking element 4. The latching part 71 can abut against the driving surface 43 and drive the first locking element 4 to slide. The setting of the driving surface 43 facilitates the automatic engagement of the first locking element 4 and the automatic latching part 71 of the helmet cover 2 during the helmet unfolding process, which facilitates the quick unfolding of the helmet body 1 and the helmet cover 2 and makes it convenient for the user to use. Preferably, the driving surface 43 is provided on the hook part 42. The latching part 71 is provided with an inclined surface 711 adapted to the driving surface 43. The inclined surface 711 slides along the driving surface 43 so that the latching part 71 passes over the hook part 42.

[0053] The helmet cover 2 described in this utility model is provided with a movable cavity 221, and the second locking member 6 is slidably disposed in the movable cavity 221. The inner cavity 11 has a slot 13 adapted to the second locking member 6 on its side wall. The second locking member 6 can pass through the movable cavity 221 and cooperate with the slot 13, so that the helmet cover 2 is stably stored at the lower end of the helmet body 1.

[0054] A lever 7 is rotatably mounted on the helmet cover 2, and a groove 61 adapted to the lever 7 is provided on the second locking member 6. The lever 7 can drive the second locking member 6 to slide relative to the helmet cover 2 through the groove 61 and make the second locking member 6 pass through the movable cavity 221, so that the second locking member 6 cooperates with the slot 13. The slot 13 is set on the side wall of the inner cavity 11. The structure is simple and convenient for production and processing. Since the second locking member 6 is slidably mounted in the movable cavity 221, the second locking member 6 is not exposed during the helmet unfolding process, which is conducive to improving the safety of the helmet and avoiding damage to the second locking member 6 from impacts, which is conducive to extending the service life of the helmet. Preferably, the lever 7 is provided with a driving part 72 adapted to the groove 61.

[0055] In this embodiment, the helmet cover 2 includes a cover body 21 and a second mounting base 22. The cover body 21 is provided with a second fixing groove 211 for mounting the second mounting base 22. The movable cavity 221 is provided in the second mounting base 22. The movable cavity 221 is provided with a sliding groove 222 adapted to the second locking member 6. The second mounting base 22 is provided with a hinge groove 223. The lever 7 is provided with a hinge part 73 adapted to the hinge groove 223.

[0056] The helmet cover 2 is provided with a limiting groove 224, and the lever 7 is provided with a limiting part 74 that is adapted to the limiting groove 224. The limiting part 74 cooperates with the limiting groove 224 to restrict the relative rotation of the lever 7 and the helmet cover 2, and keeps the second locking member 6 in cooperation with the slot 13. The setting of the limiting part 74 is conducive to the second locking member 6 in cooperation with the slot 13, preventing the helmet body 1 and the helmet cover 2 from being accidentally unfolded during the movement and transportation, and facilitating the storage and transportation of the helmet.

[0057] Preferably, the lever 7 is provided with a locking part 71 that can extend toward the helmet body 1. The locking part 71 can cooperate with the first locking member 4 to fix the helmet cover 2 relative to the helmet body 1. The lever 7 can drive the second locking member 6 to be stored in the movable cavity 221. By controlling the lever 7 to rotate, the locking part 71 can be flipped and close toward the helmet cover 2. The locking part 71 provided on the lever 7 helps to simplify the helmet structure, and this structure can prevent the second locking member 6 from passing through the movable cavity 221 during the helmet unfolding process.

[0058] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A foldable helmet, comprising a helmet body (1) and a helmet cover (2) which are foldable relative to each other, an inner cavity (11) being provided in the helmet body (1) and extending through both upper and lower sides of the helmet body (1), and the helmet cover (2) being mountable on the helmet body (1) and covering an upper end of the inner cavity (11), characterized in that: The helmet body (1) is provided with a connecting rod (3) on the side, the connecting rod (3) is rotatably connected with the helmet body (1) and the helmet cover (2) respectively, and the first locking piece (4) is movably arranged on the helmet body (1) or the helmet cover (2), and the first locking piece (4) can control the helmet cover (2) to be fixed on the upper end of the helmet body (1); The helmet cover (2) can be turned to the lower end of the helmet body (1) through the connecting rod (3), and the upper end of the helmet cover (2) is inserted into the inner cavity (11) from the lower end of the inner cavity (11), and the second locking piece (6) is movably arranged on the helmet body (1) or the helmet cover (2), and the second locking piece (6) can control the helmet cover (2) to be stored in the lower end of the helmet body (1).

2. A foldable helmet according to claim 1, characterized in that: The helmet body (1) and the helmet cover (2) are respectively provided with a first abutting wall (18) and a second abutting wall (25), the helmet body (1) and the helmet cover (2) are connected through the first locking piece (4), the connecting rod (3) can abut on the first abutting wall (18) and the second abutting wall (25) respectively and avoid relative rotation of the connecting rod (3) with the helmet body (1) and the helmet cover (2).

3. A foldable helmet according to claim 1 or 2, characterized in that: The upper end of the helmet body (1) is provided with a supporting wall (14) and a positioning groove (15), the helmet cover (2) is provided with a third abutting wall (23) matched with the supporting wall (14) and a positioning protrusion (24) matched with the positioning groove (15); the helmet cover (2) is controlled to be fixed on the upper end of the helmet body (1) through the first locking piece (4), the third abutting wall (23) abuts on the supporting wall (14), and the positioning protrusion (24) is matched with the positioning groove (15).

4. A foldable helmet according to claim 3, characterized in that: The inner cavity (11) is provided with an abutting surface (12), the lower end of the abutting surface (12) is inclined to the outer periphery of the helmet body (1), the upper end of the helmet cover (2) is inserted into the inner cavity (11) and abuts on the abutting surface (12).

5. A foldable helmet according to claim 1 or 2 or 4, wherein: The first locking piece (4) is movably arranged on the helmet body (1), and the helmet body (1) is provided with an elastic member (5) for driving the first locking piece (4) to reset, the first locking piece (4) comprises a button part (41) and a hook part (42), the helmet cover (2) is movably provided with a clamping part (71) matched with the hook part (42), the clamping part (71) can move to the lower end of the helmet cover (2) and cooperate with the hook part (42), and the elastic member (5) drives the hook part (42) and the clamping part (71) to match to avoid accidental disengagement of the hook part (42) and the clamping part (71).

6. A foldable helmet according to claim 5, characterized in that: The locking piece is slidably arranged on the helmet body (1), the first locking piece (4) is provided with a driving surface (43), the driving surface (43) is inclined to the sliding direction of the first locking piece (4), and the clamping part (71) can abut on the driving surface (43) and drive the first locking piece (4) to slide.

7. A foldable helmet according to claim 1 or 2 or 4 or 6, wherein: The helmet cover (2) is provided with a movable cavity (221), the second locking piece (6) is slidably arranged in the movable cavity (221), the inner cavity (11) is provided with a clamping groove (13) matched with the second locking piece (6), and the second locking piece (6) can be inserted out of the movable cavity (221) and matched with the clamping groove (13), so that the helmet cover (2) is stably stored in the lower end of the helmet body (1).

8. A foldable helmet according to claim 7, characterized in that: The knob (2) is provided with a rotatingly arranged lever (7), the second locking member (6) is provided with a lever groove (61) matched with the lever (7), the lever (7) can drive the second locking member (6) to slide relative to the knob (2) through the lever groove (61) and make the second locking member (6) pass out of the movable cavity (221), so that the second locking member (6) cooperates with the clamping groove (13).

9. A foldable helmet according to claim 8, characterized in that: The knob (2) is provided with a limiting groove (224), the lever (7) is provided with a limiting part (74) matched with the limiting groove (224), the limiting part (74) cooperates with the limiting groove (224) to limit the relative rotation of the lever (7) and the knob (2), and make the second locking member (6) keep cooperating with the clamping groove (13).

10. A foldable helmet according to claim 8 or 9, characterized in that: The lever (7) is provided with a clamping part (71) which can extend to the helmet body (1), the clamping part (71) can cooperate with the first locking member (4) to make the knob (2) relatively fixed with the helmet body (1), and the second locking member (6) can be accommodated in the movable cavity (221) through the lever (7); the lever (7) is controlled to rotate, and the clamping part (71) can be turned to close to the knob (2).

Images