Safety buckle, strap assembly and safety helmet

Abstract

The present application discloses a safety buckle, a strap assembly and a safety helmet. The safety buckle includes: a male buckle, including a plug-in portion; and a female buckle, including a slot, wherein the slot is configured to be able to move relative to the plug-in portion along a first direction to be plugged and matched with the plug-in portion so that the male buckle and the female buckle are mutually locked; at least one of the plug-in portion and the slot is configured to be able to elastically deform when the safety buckle is subjected to an external force within a set range, so that the slot in a plug-in and matched state can continue to move relative to the plug-in portion along the first direction to be separated from the plug-in portion. When the force applied to the safety buckle is within a set range, the male buckle and the female buckle are separable. When the safety buckle is used for the chin strap of a safety helmet, it can meet both the reuse requirements of the safety helmet and the standard requirements.

Description

Technical Field

[0001] The present invention relates to safety buckle technology, and more particularly to a safety buckle, a belt assembly including the safety buckle, and a safety helmet including the belt assembly. Background Art

[0002] In the existing safety helmets, the two ends of the chin strap are usually directly connected to the two anchor points of the cap lining. In order to meet the safety requirements, the chin strap needs to be able to be destroyed. According to the requirements of relevant standards, the force value when the chin strap is destroyed should be between 150N and 250N. However, in the existing safety helmets, when the external force reaches the above force value, the anchor points and / or related connecting parts on the cap lining often undergo destructive deformation, and this destructive deformation will cause the safety helmet to be unable to be reused. In practice, the external force reaching the destructive force value is not necessarily due to the occurrence of an incident that endangers safety. It may also be an external force applied by the user due to irregular operation, such as using the safety helmet as a carrying container for other construction tools, and may also be carried by hand and shaken vigorously. These irregular or inadvertent actions can also cause the external force value to reach the set range. If there is an irregular operation or inadvertent action, the chin strap-related parts of the safety helmet will be destructively deformed and cannot be used, which not only leads to material waste, but also delays on-site construction. Summary of the invention

[0003] An embodiment of the present application provides a safety buckle, whose male buckle and female buckle can be separated when the force applied to the safety buckle is within a set range. When the safety buckle is used for the chin strap of a safety helmet, it can meet both the standard requirements for the destructive force value and the requirements for the reuse of the safety helmet.

[0004] Regarding the above-mentioned reusable safety buckle structure design, a further improvement of the embodiment of the present application also includes providing a safety buckle that prevents accidental detachment.

[0005] For the safety buckle that needs to prevent accidental detachment, further improvements of the embodiments of the present application also include providing a safety buckle that can make the anchoring component not only play an anchoring role, but also play a stop role, thereby achieving the effect of reducing injection molded parts.

[0006] Regarding the reusable safety buckle structure design, further improvements of the embodiments of the present application also include providing a safety buckle structure that can easily adjust and fine-tune the destructive force value over a large range and has a simple manufacturing process. This structure makes it easy to adjust the destructive force value of safety buckles of different materials and sizes by adjusting the mold to achieve a destructive force value that meets the requirements.

[0007] For a safety buckle that needs to be prevented from accidental detachment, a further improvement of the embodiment of the present application also includes providing a safety buckle that can prevent the female buckle from being accidentally detached due to displacement of the female buckle relative to the male buckle in a direction perpendicular to the first supporting surface of the male buckle body.

[0008] For the strap assembly using a safety buckle, further improvements of the embodiments of the present application also include that the lengths of the two parts of the first strap located on both sides of the fixed plate are adjustable to meet the length requirements and reduce the accuracy requirements for the lengths of the two parts of the first strap.

[0009] Regarding the above-mentioned strip assembly in which the two parts of the first strip are adjustable in length, a further improvement of the embodiment of the present application also includes limiting the maximum length of the two parts of the first strip by providing a limiting portion on the first strip.

[0010] For a safety helmet using a safety buckle, further improvements of the embodiments of the present application also include that when a cap lining is used to fix the safety buckle, even if external force is applied to the safety buckle, the cap lining is not easily deformed, the anchor used to fix the safety buckle is not easily destructively deformed, and the safety helmet is not easily tilted forward or backward.

[0011] The embodiment of the present application provides a safety buckle, comprising:

[0012] A male buckle, including a plug portion; and

[0013] A female buckle, comprising a slot, wherein the slot is configured to be movable relative to the plug-in portion along a first direction to be plugged and matched with the plug-in portion so that the male buckle and the female buckle are locked with each other;

[0014] At least one of the plug-in portion and the slot is configured to be elastically deformable when the safety buckle is subjected to an external force within a set range, so that the slot in a plug-in mating state can continue to move along the first direction relative to the plug-in portion to separate from the plug-in portion.

[0015] In some exemplary embodiments, the male buckle also includes a male buckle body, the plug-in portion includes an elastic arm connected to the male buckle body at one end and a plug-in protrusion arranged at the other end of the elastic arm, the plug-in protrusion is arranged to be able to be plugged into and cooperate with the slot, and the elastic arm is arranged to be able to be elastically deformed so that the slot can be separated from the plug-in protrusion.

[0016] In some exemplary embodiments, the female buckle includes a female buckle body and a plug-in fitting portion disposed at one end of the female buckle body, and the slot is disposed at the plug-in fitting portion.

[0017] In some exemplary embodiments, the plug-in parts are provided with two and are respectively arranged on opposite sides of the male buckle body, and the plug-in protrusions of the two plug-in parts protrude toward each other; and

[0018] The slots are provided on both sides of the plug-in mating portion, and the slots on both sides are configured to be plug-fitted with the plug-in protrusions of the two plug-in portions respectively.

[0019] In some exemplary embodiments, a slide groove is formed between the two plug-in parts, and the plug-in mating part is configured to be able to slide in the slide groove relative to the plug-in part along the first direction, so that the plug-in protrusion is plug-fitted with the slot.

[0020] In some exemplary embodiments, the male buckle is provided with a first guide portion, and the female buckle is provided with a second guide portion, and the first guide portion and the second guide portion are slidably matched to guide the movement of the slot relative to the plug-in portion along the first direction.

[0021] In some exemplary embodiments, the first guide portion is disposed on the male buckle body, the second guide portion is disposed at one end of the female buckle close to the plug-in mating portion, and one of the first guide portion and the second guide portion includes at least one guide groove, and the other of the first guide portion and the second guide portion includes at least one guide protrusion that corresponds one-to-one with at least one of the guide grooves.

[0022] In some exemplary embodiments, the male buckle is provided with a first stop portion, and the female buckle is provided with a second stop portion, and the first stop portion and the second stop portion are configured to be able to stop and mate when the slot and the plug-in portion are plugged in and out, so as to prevent the slot in the plug-in and out state from moving relative to the plug-in portion in a second direction opposite to the first direction.

[0023] In some exemplary embodiments, the first stop portion includes a step surface provided on the male buckle body, and the second stop portion includes a stop surface formed by an end surface of the plug-in fitting portion away from one end of the female buckle body.

[0024] In some exemplary embodiments, one of the male buckle and the female buckle is provided with a mounting groove, and the mounting groove is configured to be installed and matched with a first anchor to fix one of the male buckle and the female buckle to the first anchor, and the other of the male buckle and the female buckle is provided with an abutment surface, and the abutment surface is configured to abut with the first anchor when the slot is plugged into the plug-in portion to prevent the slot in the plug-in state from moving relative to the plug-in portion along a second direction opposite to the first direction.

[0025] In some exemplary embodiments, the shape of the mounting groove is configured to match the shape of the first anchor, the mounting groove is an elongated groove, and the width of the mounting groove along the first direction is smaller than the length of the mounting groove along a third direction perpendicular to the first direction; and

[0026] One of the male buckle and the female buckle is configured to rotate relative to the first anchor by a first set angle to cooperate with the first anchor stop after the first anchor passes through the installation slot, and the abutment surface is configured to be able to abut and cooperate with the first anchor when the slot is plugged into the plug-in portion.

[0027] In some exemplary embodiments, the male buckle body is provided with the mounting groove, and the end surface of the plug-in fitting portion away from one end of the female buckle body forms the abutment surface.

[0028] In some exemplary embodiments, the male buckle is provided with a plurality of guide protrusions, the female buckle is provided with a plurality of guide grooves, and the plurality of guide protrusions and the plurality of guide grooves are slidably matched one by one to guide the movement of the slot relative to the plug-in portion along the first direction; and

[0029] A spacing convex portion is provided between any two adjacent guide grooves among the plurality of guide grooves, and at least one of the spacing convex portions is configured to abut against the first anchoring member when the slot is plugged into and matched with the plug-in portion.

[0030] In some exemplary embodiments, the male buckle body is provided with the installation groove, and the spacing between the plug-in protrusion and the installation groove along the first direction is set to be no less than the width of the plug-in mating portion along the first direction.

[0031] In some exemplary embodiments, the plug-in protrusion is wedge-shaped, and the height of the plug-in protrusion protruding from the elastic arm gradually increases along the first direction, and the shape of the slot is set to be a wedge-shaped slot that matches the shape of the plug-in protrusion, and

[0032] The elastic arm and the male buckle body are integrally formed, and a connecting rib is provided between one end of the elastic arm away from the plug-in protrusion and the male buckle body.

[0033] In some exemplary embodiments, the plug-in protrusion is wedge-shaped, and the height of the plug-in protrusion protruding from the elastic arm gradually increases along the first direction, and the shape of the slot is set to be a wedge-shaped groove that matches the shape of the plug-in protrusion; and / or

[0034] The connection portion between the elastic arm and the male buckle body is provided with a rounded chamfer; and / or

[0035] A connecting rib is connected between the middle portion of the elastic arm and the male buckle body; and / or

[0036] The wall thickness of the elastic arm is greater than the wall thickness of the male buckle body.

[0037] In some exemplary embodiments, the male buckle body has a first supporting surface, and the first supporting surface is configured to contact a portion of the female buckle when the slot is plugged into the plug-in portion; and

[0038] The male buckle is provided with a third stop portion, and the female buckle is provided with a fourth stop portion. The third stop portion and the fourth stop portion are configured to be able to stop and cooperate to prevent the plug-in fitting portion from moving in a direction perpendicular to the first supporting surface in a direction away from the male buckle body.

[0039] In some exemplary embodiments, the male buckle body has a first supporting surface, the first supporting surface is configured to contact a portion of the female buckle when the slot is plugged into the plug-in portion, the male buckle is provided with a third stop portion, and the female buckle is provided with a fourth stop portion, the third stop portion and the fourth stop portion are configured to be able to stop and cooperate to prevent the plug-in mating portion from moving in a direction perpendicular to the first supporting surface in a direction away from the male buckle body, wherein:

[0040] The third stop portion includes a stop protrusion provided on the end surface of the elastic arm away from the male buckle body, and the fourth stop portion includes a stop surface formed by the end surface of the plug-in mating portion away from the male buckle body; or

[0041] The third stop portion includes a stop protrusion arranged on the elastic arm, the stop protrusion and the plug-in protrusion are arranged on the same end surface of the elastic arm, and the stop protrusion is located on a side of the plug-in protrusion away from the male buckle body, and the fourth stop portion includes a stop groove arranged on an end surface of the plug-in mating portion away from the male buckle body; or

[0042] The third stop portion is arranged on the first guide portion, the fourth stop portion is arranged on the second guide portion, and one of the third stop portion and the fourth stop portion is a stop hook, and the other of the third stop portion and the fourth stop portion is a hook matching portion; or

[0043] The third stop portion is arranged on the male buckle body, the fourth stop portion is arranged on the plug-in fitting portion, and one of the third stop portion and the fourth stop portion is a stop hook, and the other of the third stop portion and the fourth stop portion is a hook fitting portion.

[0044] In some exemplary embodiments, the male buckle body has a first supporting surface, which is configured to contact a portion of the female buckle when the slot is plugged into the plug-in portion, and the female buckle body includes a protruding portion protruding from the male buckle body along the first direction, and the length of the first supporting surface along the first direction is greater than the length of the protruding portion of the female buckle along the first direction.

[0045] In some exemplary embodiments, the male buckle further comprises a first connecting portion connected to the male buckle body, wherein the first connecting portion is configured to be connected to a strip; and / or

[0046] The female buckle further includes a second connection portion connected to the female buckle body, and the second connection portion is configured to be connected to a strap.

[0047] An embodiment of the present application also provides a strap assembly, including a first strap and a safety buckle, wherein one end of the safety buckle is configured to be connected to one of a male buckle and a female buckle of the safety buckle.

[0048] In some exemplary embodiments, the other end of the first strap is configured to be connected to the other of the male buckle and the female buckle of the safety buckle.

[0049] In some exemplary embodiments, the strip assembly further comprises a fixing plate, wherein the fixing plate is configured to be fixed to the second anchor, and the fixing plate is provided with two through holes, and the middle portion of the first strip passes through the two through holes in sequence.

[0050] In some exemplary embodiments, the first strip includes a first portion located between the male buckle and the fixing plate, and a second portion located between the female buckle and the fixing plate, and the first strip is configured to slide along the through hole to adjust the lengths of the first portion and the second portion.

[0051] In some exemplary embodiments, the through hole penetrates the first plate surface and the second plate surface that are oppositely disposed on the fixing plate, and the portion of the first strip located between the two through holes faces the second plate surface;

[0052] The second plate surface is provided with a supporting convex rib, and the supporting convex rib is located between the two through holes and supports the first strip.

[0053] In some exemplary embodiments, the fixing plate is provided with a fixing hole, the fixing hole passes through the first plate surface and the second plate surface, the fixing hole is an elongated slot, and the shape of the fixing hole is configured to match the shape of the second anchor;

[0054] The fixing plate is configured to rotate relative to the second anchor by a second set angle to engage with the second anchor stop after the second anchor passes through the fixing hole in a direction from the first plate surface to the second plate surface;

[0055] The height of the supporting rib protruding from the second plate surface is set to be greater than the height of the second anchor piece cooperating with the fixing plate stopper protruding from the second plate surface.

[0056] In some exemplary embodiments, the first strip is provided with a limiting portion, the limiting portion is located on a side of one of the through holes away from the other through hole, and the limiting portion is configured to cooperate with the through hole to stop and limit the first strip.

[0057] In some exemplary embodiments, a portion of the first strip is folded and fixed to form the limiting portion.

[0058] In some exemplary embodiments, the first strip is a single continuous strip; or

[0059] The first strip includes two sub-strips, namely a first sub-strip and a second sub-strip, one end of the first sub-strip is connected to the male buckle, one end of the second sub-strip is connected to the female buckle, and the other end of the second sub-strip passes through the two through holes in sequence and is connected to the other end of the first sub-strip, wherein the limiting portion is formed at the connection between the first sub-strip and the second sub-strip.

[0060] In some exemplary embodiments, the strap assembly further includes a fixing plate, the other end of the first strap is connected to the fixing plate, and the fixing plate is configured to be fixed to the second anchor.

[0061] An embodiment of the present application also provides a safety helmet, including a safety helmet body and a strap assembly, the safety helmet body is provided with a first anchor and a second anchor, one of a male buckle and a female buckle of a safety buckle of the strap assembly is fixed to the first anchor, and a fixing plate of the strap assembly is fixed to the second anchor.

[0062] In some exemplary embodiments, one of the first portion and the second portion of the first strap is arranged to pass around the top of the wearer's head, and the other of the first portion and the second portion is arranged to pass around the wearer's chin; or

[0063] The first strap is arranged to pass around the chin of the wearer.

[0064] In some exemplary embodiments, the safety helmet further comprises at least one second strap, both ends of the second strap are connected to the safety helmet body, and the second strap is configured to pass around the top of the wearer's head.

[0065] In some exemplary embodiments, the safety helmet body includes a helmet shell and a cap lining fixed to the helmet shell, and the first anchor and the second anchor are provided on the cap lining and are spaced 180 degrees apart.

[0066] The safety buckle of the embodiment of the present application, the male buckle and the female buckle of the plug-in fitting can maintain a stable and reliable connection when not subjected to external force or subjected to external force less than a set range, and when subjected to external force within a set range, at least one of the plug-in part and the slot undergoes elastic deformation, so that the male buckle and the female buckle are separated. That is, under normal use, the male buckle and the female buckle can play a connecting role like the conventional male buckle and the female buckle; when encountering a larger external force, the male buckle and the female buckle can separate by themselves. When the safety buckle is used for the chin strap of the helmet, the chin strap can be disconnected at the safety buckle when subjected to external force within a set range, protecting the wearer from injury; in addition, when the safety buckle is subjected to external force within a set range, the male buckle and the female buckle are separated by elastic deformation of at least one of the plug-in part and the slot, and the male buckle and the female buckle do not undergo destructive deformation, so that the safety buckle can be reused, and then the chin strap of the helmet and the helmet can be reused. Therefore, this connection method of the male buckle and the female buckle is simple in structure, convenient in operation, stable and reliable in connection, and highly safe to use and reusable.

[0067] Other features and advantages of the present application will be set forth in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0069] Figure 1 A schematic diagram of the structure of a safety buckle according to an embodiment of the present application;

[0070] Figure 2 for Figure 1 The schematic diagram of the exploded structure of the safety buckle shown;

[0071] Figure 3 for Figure 1 A schematic cross-sectional structure diagram of a safety buckle shown;

[0072] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the male buckle of the safety buckle shown;

[0073] Figure 5 for Figure 1 A schematic diagram of the main structure of the male buckle of the safety buckle shown;

[0074] Figure 6 for Figure 1A schematic diagram of the three-dimensional structure of the female buckle of the safety buckle shown;

[0075] Figure 7 for Figure 1 The schematic diagram of the front view structure of the female buckle of the safety buckle shown;

[0076] Figure 7a-7g Schematic diagrams of different structures of safety buckles in other embodiments of the present application;

[0077] Figure 8 for Figure 1 A schematic cross-sectional structure diagram of a female buckle of a safety buckle shown;

[0078] Fig. 9 This is a structural schematic diagram of the separation process of the male buckle and the female buckle of a safety buckle according to an embodiment of the present application;

[0079] Fig.10 It is a partial cross-sectional structural schematic diagram of the plugging process of the male buckle and the female buckle of the safety buckle according to one embodiment of the present application;

[0080] Fig.11a This is a schematic diagram of the assembly process of the safety buckle and the first anchor member according to another embodiment of the present application;

[0081] Fig.11b This is a schematic structural diagram of another embodiment of the present application after the safety buckle and the first anchor are assembled;

[0082] Fig.12 A schematic structural diagram of a male buckle of a safety buckle according to another embodiment of the present application;

[0083] Fig.13 This is a structural schematic diagram of the male buckle and the female buckle of a safety buckle in an insertion state according to another embodiment of the present application;

[0084] Fig.13a for Fig.13 Schematic diagram of the structure of the Zhonggong buckle;

[0085] Fig.14 This is a structural schematic diagram of the male buckle and the female buckle of a safety buckle in a plugged connection state according to another embodiment of the present application;

[0086] Fig.14a for Fig.14 Schematic diagram of the structure of the Zhonggong buckle;

[0087] Fig.14b for Fig.14 Schematic diagram of the structure of the middle female buckle;

[0088] Fig.14c This is a schematic structural diagram of a male buckle of a safety buckle according to another embodiment of the present application;

[0089] Fig.14dThis is a schematic structural diagram of a female buckle of a safety buckle according to another embodiment of the present application;

[0090] Fig.14e A schematic structural diagram of a male buckle of a safety buckle according to yet another embodiment of the present application;

[0091] Fig.14f This is a schematic structural diagram of a female buckle of a safety buckle according to yet another embodiment of the present application;

[0092] Fig.15 This is a schematic diagram of the principle of the plugging state of the male buckle and the female buckle of a safety buckle according to another embodiment of the present application;

[0093] Fig.16 This is a schematic diagram of the structure of the strip assembly of an embodiment of the present application;

[0094] Fig.17a Another schematic diagram of the structure of a strip assembly according to an embodiment of the present application;

[0095] Fig.17b for Fig.17a An exploded structural schematic diagram of the strip assembly is shown;

[0096] Fig.18 This is a schematic diagram of the structure of a fixing plate of a strip assembly according to an embodiment of the present application;

[0097] Fig.19 It is a schematic diagram of the partial assembly structure of the strip assembly and the second anchor member of the embodiment of the present application;

[0098] Fig. 20 A schematic diagram of the three-dimensional structure of a safety helmet according to an embodiment of the present application;

[0099] Fig.21 A schematic side view of the structure of a safety helmet according to an embodiment of the present application;

[0100] Fig. 22 It is a schematic diagram of the three-dimensional structure of the strap assembly, the second strap and the cap lining of the safety helmet of the embodiment of the present application;

[0101] Fig.23 It is a schematic diagram of a top view of the structure of the strap assembly, the second strap and the cap lining of the safety helmet of an embodiment of the present application;

[0102] Fig.24 A schematic diagram of the three-dimensional structure of the cap lining of the safety helmet according to an embodiment of the present application;

[0103] Fig.25 Another three-dimensional structural schematic diagram of the headgear lining of the safety helmet according to an embodiment of the present application.

[0104] 100-safety buckle, 200-strap assembly, 300-helmet;

[0105] 1-male buckle, 11-insertion part, 12-male buckle body, 13-slide groove, 14-first guide part, 16-installation groove, 17-first connecting part, 18-first stopper, 19-first supporting surface, 110-third stopper, 111-elastic arm, 112-insertion protrusion, 113-round chamfer, 114-connecting rib, 115-connecting rib;

[0106] 2-female buckle, 21-female buckle body, 22-insertion fitting portion, 221-slot, 23-second guide portion, 25-contact surface, 26-spacer convex portion, 27-second connecting portion, 28-second stop portion, 29-protruding portion, 210-fourth stop portion;

[0107] 3- first anchor;

[0108] 41-fixing plate, 411-perforation, 412-first plate surface, 413-second plate surface, 414-supporting ribs, 415-fixing holes, 42-first part, 43-second part, 44-limiting part, 45-first sub-strip, 46-second sub-strip;

[0109] 5-second anchor, 6-hat shell, 7-hat lining, 8-second strip. DETAILED DESCRIPTION

[0110] like Figure 1-Figure 9 As shown, the exemplary embodiment of the present application provides a safety buckle 100, including: a male buckle 1 and a female buckle 2, the male buckle 1 includes a plug-in portion 11, the female buckle 2 includes a slot 221, and the slot 221 is arranged to be able to move relative to the plug-in portion 11 along a first direction ( Figure 1 The movement is downward in the middle) to engage with the plug-in portion 11 (such as Figure 1 and Figure 3 As shown in FIG. 1 ), the male buckle 1 and the female buckle 2 can be plugged together and locked with each other (i.e., the safety buckle 100 is in a locked state at this time). At least one of the plug-in portion 11 and the slot 221 is configured to be elastically deformed when the safety buckle 100 is subjected to an external force within a set range, so that the slot 221 in the plug-in state (i.e., the locked state) can continue to move relative to the plug-in portion 11 along the first direction until it is separated from the plug-in portion 11 (as shown in FIG. 1 ). Fig. 9 ), without damaging the structure of the safety buckle 100 itself or the structure of the component to which the safety buckle 100 is attached (e.g., a strap, a helmet, etc.).

[0111] The slot 221 of the female buckle 2 is configured so that when the safety buckle 100 in the locked state is subjected to an external force within a set range, such as Fig. 9As shown, it can have a tendency to move along the first direction relative to the plug-in portion 11 under the drive of the external force. At this time, the slot 221 of the female buckle 2 and the plug-in portion 11 of the male buckle 1 can be squeezed against each other, so that at least one of the plug-in portion 11 of the male buckle 1 and the slot 221 of the female buckle 2 is elastically deformed, so that the female buckle 2 can move along the first direction relative to the male buckle 1, and the plug-in portion 11 of the male buckle 1 and the slot 221 of the female buckle 2 can be gradually separated, thereby separating the male buckle 1 and the female buckle 2.

[0112] The male buckle 1 and the female buckle 2 of the embodiment of the present application can maintain a stable and reliable connection when not subjected to external force or subjected to external force less than a set range. When subjected to external force within a set range, at least one of the plug-in portion 11 and the slot 221 undergoes elastic deformation, so that the male buckle 1 and the female buckle 2 are separated. That is, in normal use, the male buckle 1 and the female buckle 2 can play a connecting role like the conventional male buckle 1 and the female buckle 2; in the case of a larger external force, the male buckle 1 and the female buckle 2 can separate by themselves without damaging the structure of the safety buckle 100 itself or the structure of the components to which the safety buckle 100 is attached (such as straps, helmets, etc.). For example, when the safety buckle 100 is used for the chin strap of a safety helmet, the chin strap can be disconnected at the safety buckle 100 when subjected to an external force within a set range, so that the chin strap meets the standard or requirement of the destructive force value to protect the wearer from injury; in addition, when the safety buckle 100 is subjected to an external force within a set range, at least one of the plug-in portion 11 and the slot 221 undergoes elastic deformation to separate the male buckle 1 and the female buckle 2, and the male buckle 1 and the female buckle 2 do not undergo destructive deformation, so that the safety buckle 100 can be reused, and the chin strap of the safety helmet and the safety helmet can also be reused because they will not be damaged. Therefore, this connection method of the male buckle 1 and the female buckle 2 of the present application has a simple structure, convenient operation, stable and reliable connection, high safety in use, and can be reused.

[0113] In an embodiment of the present application, the slot 221 moves along a first direction relative to the plug-in portion 11. The plug-in portion 11 may be stationary and the slot 221 moves along the first direction (e.g., the male buckle 1 is stationary and the female buckle 2 moves along the first direction); or, the slot 221 may be stationary and the plug-in portion 11 moves along a second direction opposite to the first direction (e.g., the female buckle 2 is stationary and the male buckle 1 moves along the second direction); or, both the slot 221 and the plug-in portion 11 may move, and the slot 221 moves along the first direction and the plug-in portion 11 moves along the second direction opposite to the first direction (e.g., the female buckle 2 moves along the first direction and the male buckle 1 moves along the second direction).

[0114] In some exemplary embodiments, one end of the slot 221 (such as the lower end) is provided with an opening for inserting the plug-in portion 11 to achieve plug-in cooperation between the slot 221 and the plug-in portion 11, and the wall surrounding the opening is arranged to be able to interfere with the plug-in portion 11 plugged into the slot 221 to prevent the plug-in portion 11 from moving in a direction opposite to the first direction and accidentally detaching from the opening at one end of the slot 221 (such as the lower end), so that the male buckle 1 and the female buckle 2 can be locked with each other.

[0115] Of course, the wall surface surrounding the opening can also be set not to interfere with the plug-in portion 11 inserted in the slot 221, but to prevent the plug-in portion 11 from moving in the second direction opposite to the first direction and accidentally detaching from the opening at one end (such as the lower end) of the slot 221 by setting other stop structures (such as the first stop portion 18 and the second stop portion 28 described below, or the first anchor 3 and the abutment surface 25 described below). Alternatively, on the basis of the interference fit between the wall surface surrounding the opening and the plug-in portion 11 inserted in the slot 221, other stop structures (such as the first stop portion 18 and the second stop portion 28 described below, or the first anchor 3 and the abutment surface 25 described below) can be combined to jointly prevent the plug-in portion 11 from moving in the second direction opposite to the first direction and accidentally detaching from the opening at one end (such as the lower end) of the slot 221.

[0116] In some exemplary embodiments, Figure 5 and Fig. 9 As shown, the male buckle 1 also includes a male buckle body 12, and the plug-in portion 11 includes one end (such as Figure 5 The elastic arm 111 connected to the male buckle body 12 and the other end of the elastic arm 111 (such as Figure 5 The lower end of the plug-in protrusion 112. Figure 3 As shown, the plug-in protrusion 112 is configured to be plug-fitted with the slot 221 of the female buckle 2; Fig. 9 As shown, the elastic arm 111 is configured to be elastically deformable so that the slot 221 can be separated from the insertion protrusion 112 .

[0117] The elastic arm 111 can be connected to the male buckle body 12 at the upper end, and a plug-in protrusion 112 is provided at the lower end of the elastic arm 111. The male buckle body 12 and the elastic arm 111 can be integrally formed, and / or the plug-in protrusion 112 and the elastic arm 111 can be integrally formed. That is, the male buckle body 12, the elastic arm 111, and the plug-in protrusion 112 can be integrally formed, or two of the three that are connected to each other can be selectively integrally formed. When the safety buckle 100 is subjected to an external force within a set range, under the mutual squeezing action of the plug-in protrusion 112 and the slot 221, the elastic arm 111 is elastically deformed, and the plug-in protrusion 112 is displaced as the elastic arm 111 is deformed, so that the slot 221 of the female buckle 2 can move relative to the plug-in protrusion 112 of the male buckle 1 along the first direction, until the slot 221 of the female buckle 2 is separated from the plug-in protrusion 112 of the male buckle 1, so that the male buckle 1 and the female buckle 2 are separated. After the male buckle 1 and the female buckle 2 are separated, the elastic arm 111 returns to its original shape, and the safety buckle 100 does not undergo destructive deformation. Therefore, products including the safety buckle 100, such as safety helmets, can also be reused.

[0118] In this exemplary embodiment, the elastic arm 111 of the plug-in portion 11 is elastically deformed, so that when the safety buckle 100 is subjected to an external force within a set range, the plug-in portion 11 can be separated from the slot 221. Of course, it can also be configured that the slot 221 can be elastically deformed, or the plug-in portion 11 and the slot 221 can be elastically deformed at the same time, so that when the safety buckle 100 is subjected to an external force within a set range, the plug-in portion 11 can be separated from the slot 221.

[0119] In some exemplary embodiments, Figure 6-Figure 8 As shown, the female buckle 2 includes a female buckle body 21 and a plug-in fitting portion 22 arranged at one end of the female buckle body 21 , and a slot 221 is arranged in the plug-in fitting portion 22 .

[0120] like Figure 6-Figure 8 As shown, the plug-in fitting portion 22 can be arranged at the upper end of the female buckle body 21, and the plug-in fitting portion 22 can be integrally formed with the female buckle body 21. The plug-in fitting portion 22 is provided with a slot 221 for plugging and fitting with the plug-in portion 11 of the male buckle 1.

[0121] In some exemplary embodiments, Figure 4 and Figure 5 As shown, two plug-in parts 11 are provided, and are respectively arranged on opposite sides of the male buckle body 12, and the plug-in protrusions 112 of the two plug-in parts 11 protrude toward each other; Figure 6 and Figure 8 As shown, both sides of the plug-in mating portion 22 are provided with slots 221; Figure 3 As shown, the slots 221 on both sides are configured to be plugged and matched with the plug-in protrusions 112 of the two plug-in parts 11 respectively.

[0122] like Figure 5 As shown, both sides of the male buckle body 12 may be provided with a plug-in portion 11, and the plug-in portions 11 on both sides may be symmetrically arranged, and the plug-in protrusion 112 of one plug-in portion 11 may be arranged on a side of the elastic arm 111 of the plug-in portion 11 close to the other plug-in portion 11, such as: the plug-in protrusion 112 of the left plug-in portion 11 may be arranged on the right side of the elastic arm 111, and the plug-in protrusion 112 of the right plug-in portion 11 may be arranged on the left side of the elastic arm 111, so that the plug-in protrusions 112 of the two plug-in portions 11 protrude toward each other; Figure 8 As shown, the left and right sides of the plug-in mating portion 22 may be symmetrically provided with slots 221; Figure 3 As shown, the two slots 221 can be plugged into and matched with the two plug-in protrusions 112 to balance the forces on the left and right sides of the male buckle 1 and the female buckle 2.

[0123] In some exemplary embodiments, Figure 4 As shown, a slide groove 13 is formed between the two plug-in parts 11; the plug-in mating part 22 is configured to slide in the slide groove 13 relative to the plug-in part 11 along a first direction, so that the plug-in protrusion 112 is plugged and matched with the slot 221, as shown in FIG. Figure 1 and Figure 3 shown.

[0124] In the process of realizing the plug-in fit of the plug-in protrusion 112 and the slot 221, the plug-in fit portion 22 can be received in the vertically extending slide groove 13 between the two plug-in portions 11. The slide groove 13 can guide the movement of the plug-in fit portion 22 to prevent the plug-in fit portion 22 from deflecting relative to the first direction when sliding along the first direction relative to the plug-in portion 11, so that the plug-in protrusion 112 can be smoothly plugged into the slot 221.

[0125] When installing the female buckle 2 to the male buckle 1, the plug-in fitting portion 22 of the female buckle 2 can be first placed into the slide groove 13 between the two plug-in portions 11 of the male buckle 1, and then external force is applied by hand to make the plug-in fitting portion 22 of the female buckle 2 slide along the slide groove 13 along the first direction until the slot 221 and the plug-in protrusion 112 of the plug-in portion 11 abut against each other, so that the slot 221 and the plug-in protrusion 112 of the plug-in portion 11 are in a plug-in fitting state.

[0126] In some exemplary embodiments, Figure 7g and Fig.10 As shown, the male buckle 1 is provided with a first stop portion 18, and the female buckle 2 is provided with a second stop portion 28. The first stop portion 18 and the second stop portion 28 are configured to be able to stop and mate when the slot 221 is plugged into and mated with the plug-in portion 11, so as to prevent the slot 221 in the plug-in mating state from moving relative to the plug-in portion 11 in a second direction opposite to the first direction.

[0127] For example: In one embodiment, Figure 7g and Fig.10 As shown, the first stopper 18 includes a step surface provided on the male buckle body 12, and the second stopper 28 includes a stopper surface formed by the end surface of the plug-in mating portion 22 away from the female buckle body 21. When the slot 221 and the plug-in portion 11 are in a plug-in mating state, the step surface of the male buckle body 12 blocks the end surface of the plug-in mating portion 22 away from the female buckle body 21 from moving in a second direction opposite to the first direction (such as Fig.10 upward direction) movement, such as Fig.10 As shown in state (b) in the figure, the female buckle 2 is prevented from moving upward relative to the male buckle 1, so that the male buckle 1 and the female buckle 2 are in a stable plug-in mating state and will not accidentally disengage from each other in the upward direction.

[0128] like Figure 7g and Fig.10 As shown, the male buckle body 12 is provided with a step surface, and the step surface can form a first stopper 18. The thickness of the portion of the male buckle body 12 located on the upper side of the step surface can be greater than the thickness of the portion of the male buckle body 12 located on the lower side of the step surface. The plug-in fitting portion 22 can be located at the upper end of the female buckle body 21, and the upper end surface of the plug-in fitting portion 22 can form a stopper surface, and can be matched with the step surface of the male buckle body 12.

[0129] When the slot 221 slides relative to the plug-in portion 11 along the first direction to achieve plug-in engagement, Fig.10 As shown in the state (a), under the extrusion of the portion of the male buckle body 12 located on the upper side of the step surface and the plug-in mating portion 22 of the female buckle 2, the male buckle body 12 can move backward ( Fig.10 The female buckle 2 is elastically deformed in the left direction until the plug-in mating portion 22 of the female buckle 2 slides into place so that the plug-in portion 11 and the slot 221 are plugged in and mated. Fig.10 As shown in state (b), the plug-in mating portion 22 moves to the lower side of the step surface, and the male buckle body 12 rebounds forward to the state before deformation (initial state). When the slot 221 and the plug-in portion 11 are in the plug-in mating state, the step surface of the male buckle body 12 can abut against the stop surface formed by the upper end surface of the plug-in mating portion 22 of the female buckle 2, as shown in FIG. Fig.10 As shown in state (b) in the figure, the plug-in mating part is blocked from moving in a second direction opposite to the first direction, i.e., upward movement, so that the female buckle 2 is prevented from moving upward relative to the male buckle 1, so that the male buckle 1 and the female buckle 2 are in a stable plug-in mating state and will not accidentally disengage from each other in the upward direction.

[0130] In some exemplary embodiments, one of the male buckle 1 and the female buckle 2 is provided with a mounting groove 16, and the mounting groove 16 is configured to be installed and cooperated with the first anchor 3 to fix one of the male buckle 1 and the female buckle 2 provided with the mounting groove 16 to the first anchor 3.

[0131] like Fig.11bAs shown, the male buckle 1 may be provided with a mounting groove 16, and the mounting groove 16 may penetrate the male buckle 1 along the thickness direction (front-back direction), so that the male buckle 1 can be fixed to the first anchor 3. When the male buckle 1 is fixed to the first anchor 3, the mounting groove 16 of the male buckle 1 can be fixedly matched with the first anchor 3, and then the female buckle 2 can be moved relative to the male buckle 1 to achieve the plug-in fit between the plug-in portion 11 and the slot 221.

[0132] Of course, the mounting groove can also be provided on the female buckle 2 , so that the female buckle 2 can be fixed to the first anchor 3 , and the male buckle 1 can move relative to the female buckle 2 to achieve the plug-in fit between the plug-in portion 11 and the slot 221 .

[0133] In addition to the first stopper 18 and the second stopper 28 cooperating to prevent the slot 221 in the plug-in state from moving relative to the plug-in portion 11 in the second direction opposite to the first direction, the male buckle 1 and the female buckle 2 can also be realized in other ways. For example, in other exemplary embodiments, one of the male buckle 1 and the female buckle 2 can be provided with a mounting groove 16 fixedly matched with the first anchor 3, and the other of the male buckle 1 and the female buckle 2 is provided with an abutment surface 25, which is configured to abut against the first anchor 3 when the slot 221 is plug-in-matched with the plug-in portion 11, so as to prevent the slot 221 in the plug-in state from moving relative to the plug-in portion 11 in the second direction opposite to the first direction.

[0134] like Fig.11b As shown, the male buckle 1 may be provided with a mounting groove 16, and the female buckle 2 may be provided with an abutment surface 25. After the male buckle 1 is fixed to the first anchor 3, and the plug-in portion 11 of the male buckle 1 is plugged and matched with the slot 221 of the female buckle 2, the abutment surface 25 of the female buckle 2 abuts against the first anchor 3, which can prevent the slot 221 from moving relative to the plug-in portion 11 in a second direction opposite to the first direction, so as to prevent the slot 221 from accidentally disengaging from the plug-in portion 11. Therefore, the abutment surface 25 of the female buckle 2 abuts against the first anchor 3, which can effectively prevent the male buckle 1 and the female buckle 2 from separating in the second direction, making the connection between the male buckle 1 and the female buckle 2 more stable and reliable.

[0135] The first anchor 3 for fixing the male buckle 1 is used to realize the stopping effect on the female buckle 2, so as to prevent the male buckle 1 and the female buckle 2 from separating along the second direction, without adding an additional stopping structure on the male buckle 1 to stop the female buckle 2. The structure is simple, the operation is convenient, and the stopping is reliable.

[0136] In some exemplary embodiments, Figure 5 , Fig.11a and Fig.11b As shown, the shape of the mounting groove 16 is configured to match the shape of the first anchor 3, the mounting groove 16 is an elongated groove, and the width W1 of the mounting groove 16 along the first direction or the second direction (eg Figure 5) is smaller than the length L0 of the mounting groove 16 along the third direction perpendicular to the first direction and the second direction (as shown in Figure 5 One of the male buckle 1 and the female buckle 2 is configured to rotate relative to the first anchor 3 by a first set angle after the first anchor 3 passes through the mounting slot 16 to engage with the first anchor 3, and the abutment surface 25 is configured to engage with the first anchor 3 when the slot 221 is engaged with the plug-in portion 11.

[0137] like Fig.11a and Fig.11b As shown, the middle part of the first anchor 3 is set as a cylinder that can extend through the installation groove 16, and the upper and lower ends of the cylinder are symmetrically provided with fan-shaped parts, which can be set on the front part of the cylinder. Figure 5 , Fig.11a and Fig.11b As shown, the shape of the mounting groove 16 of the male buckle 1 is adapted to the shape of the first anchor 3. The middle part of the mounting groove 16 can be a cylindrical groove matching the cylindrical shape of the first anchor 3, and the left and right ends of the cylindrical groove are symmetrically provided with fan-shaped grooves matching the fan-shaped part of the first anchor 3. The width of the mounting groove 16 along the first direction or the second direction (i.e., along the Figure 5 and Fig.11b The width W1 in the vertical direction is smaller than the length of the mounting groove 16 along the third direction (i.e., along Figure 5 and Fig.11b The length in the left-right direction) L0.

[0138] When the mounting groove 16 is provided on the male buckle 1, in the fixing operation between the male buckle 1 and the first anchor 3, as shown in FIG. Fig.11a As shown, the mounting groove 16 of the male buckle 1 can be firstly made to coincide with the first anchor 3, and the first anchor 3 can be made to overlap with the first anchor 3 from behind ( Fig.11a in the direction perpendicular to the paper facing inward or perpendicular to the paper facing away from the reader) forward ( Fig.11a The first anchor 3 is passed through the mounting groove 16 in a direction perpendicular to the paper plane outward or perpendicular to the paper plane toward the reader, so that the fan-shaped portion of the first anchor 3 passes through the mounting groove 16 from the front side; then the male buckle 1 can be rotated relative to the first anchor 3 along the first rotation direction by a first set angle (such as 90° clockwise), so that the fan-shaped portion of the first anchor 3 is rotated to be misaligned with the fan-shaped groove of the mounting groove 16, and can cooperate with the male buckle 1 stopper, such as Fig.11b As shown, the first anchor 3 is prevented from accidentally detaching from the mounting groove 16 of the male buckle 1, thereby achieving the fixation of the male buckle 1 and the first anchor 3. On the basis of the fixation of the male buckle 1 and the first anchor 3, the abutment surface 25 of the female buckle 2 can be abutted and matched with the first anchor 3 to prevent the male buckle 1 and the female buckle 2 from separating along the second direction; or, the first stopper 18 can be matched with the second stopper 28 to prevent the male buckle 1 and the female buckle 2 from separating along the second direction.

[0139] like Fig.11b As shown, after the slot 221 of the female buckle 2 is plugged into the plug-in portion 11 of the male buckle 1, the abutment surface 25 of the female buckle 2 can be abutted against a fan-shaped portion of the first anchor 3 to which the male buckle 1 is fixed, and the first anchor 3 has a stopping effect on the abutment surface 25 to prevent the male buckle 1 and the female buckle 2 from separating along the second direction.

[0140] The insertion and cooperation between the slot 221 of the female buckle 2 and the plug-in portion 11 of the male buckle 1 can be carried out before the male buckle 1 is rotated to a first set angle relative to the first anchor 3, such as: the insertion and cooperation between the slot 221 of the female buckle 2 and the plug-in portion 11 of the male buckle 1 can be carried out before the male buckle 1 and the first anchor 3 are installed and fixed, or, it can be carried out after the first anchor 3 passes through the installation groove 16 of the male buckle 1 and before the male buckle 1 is rotated relative to the first anchor 3.

[0141] When the male buckle 1 and the female buckle 2 are separated, the male buckle 1 mounted on the first anchor 3 can be first rotated in a second rotation direction opposite to the first rotation direction by a first set angle so that the mounting groove 16 coincides with the first anchor 3 (such as Fig.11a As shown), at this time, the abutment surface 25 no longer abuts the first anchor 3, but is at a certain distance from the first anchor 3, so the female buckle can be moved along the second direction to separate the male buckle 1 and the female buckle 2.

[0142] When the safety buckle 100 of the embodiment of the present application is used for a safety helmet, when an irregular or inadvertent action as described in the background art occurs, resulting in the external force value possibly reaching the set range, the male buckle 1 and the female buckle 2 of the safety buckle 100 can be detached without causing destructive deformation of the chin strap-related parts of the safety helmet and making them unreusable. After the male buckle 1 and the female buckle 2 of the safety buckle 100 are detached, the male buckle 1 and the female buckle 2 can be re-locked and matched, so that the safety helmet can be reused. The steps for re-locking the male buckle 1 and the female buckle 2 are generally as follows:

[0143] First, rotate the male buckle 1 in a second rotation direction opposite to the first rotation direction. Fig.11a The status shown;

[0144] Then, the plug-in mating portion 22 of the female buckle 2 is placed into the slide groove 13 of the male buckle 1, and the plug-in mating portion 22 is slid along the first direction so that the plug-in protrusion 112 of the male buckle 1 can be plugged into the slot 221 of the female buckle 2;

[0145] Finally, rotate the male buckle 1 and the female buckle 2 along the first rotation direction to Fig.11b In the state shown, the first anchor 3 abuts against the abutment surface 25 of the female buckle 2, thereby achieving mutual locking of the male buckle 1 and the female buckle 2.

[0146] In some exemplary embodiments, Fig.11a and Fig.11b As shown, the male buckle body 12 is provided with a mounting groove 16, and the mounting groove 16 penetrates the male buckle body 12 along the thickness direction (front-back direction). The end surface of the plug-in fitting portion 22 away from the female buckle body 21 forms an abutment surface 25.

[0147] When connecting the female buckle 2 to the male buckle 1, Fig.11a As shown, the mounting groove 16 of the male buckle 1 can be firstly made to coincide with the first anchor 3; then the female buckle 2 can be plugged into the male buckle 1, at which time the first anchor 3 and the abutting surface 25 of the female buckle 2 are a certain distance apart; then the male buckle 1 (together with the female buckle 2 plugged into the male buckle 1) is rotated around the center of the first anchor 3 along the first rotation direction by a first set angle (e.g., 90° clockwise), so that the first anchor 3 abuts against the abutting surface 25 of the female buckle 2, at which time the safety buckle 100 is in Fig.11b Normal use status as shown. Fig.11b As shown, in normal use, the male buckle 1 and the female buckle 2 are in a vertical position, and the abutment surface 25 is arranged at the top of the plug-in fitting portion 22 of the female buckle 2. The abutment surface 25 can abut against the fan-shaped portion of the lower part of the first anchor 3. Due to the stopping effect of the fan-shaped portion of the first anchor 3 on the abutment surface 25 of the female buckle 2, the female buckle 2 will not move upward and be accidentally separated from the male buckle 1.

[0148] When the female buckle 2 is separated from the male buckle 1, it is also necessary to rotate the male buckle 1 (together with the female buckle 2 plugged into the male buckle 1) from the normal use position to a first set angle (such as 90° counterclockwise) in a second rotation direction opposite to the first rotation direction, so that the mounting groove 16 coincides with the first anchor 3. Since the first anchor 3 is at a certain distance from the abutting surface 25 of the female buckle 2 at this time, the female buckle 2 can be moved relative to the male buckle 1 in the second direction to separate the female buckle 2 from the male buckle 1.

[0149] The installation buckle of the embodiment of the present application can separate the female buckle 2 from the male buckle 1 only by rotating the male buckle 1 from the normal use position to a first set angle in a second rotation direction opposite to the first rotation direction (such as 90° counterclockwise), which greatly improves the reliability of the connection between the male buckle 1 and the female buckle 2, reduces accidental detachment, and thereby improves the safety of the safety buckle 100.

[0150] In some exemplary embodiments, Figure 4-7f As shown, the male buckle 1 may also be provided with a first guide portion 14, and the female buckle 2 may be provided with a second guide portion 23, and the first guide portion 14 and the second guide portion 23 are slidably matched to guide the movement of the slot 221 relative to the plug-in portion 11 along the first direction. Figure 4-7f As shown, the first guide portion 14 and the second guide portion 23 may extend in the vertical direction.

[0151] When the safety buckle 100 is subjected to an external force and the female buckle 2 moves relative to the male buckle 1 along the first direction, a guide structure is added between the male buckle 1 and the female buckle 2 due to the first guide portion 14 and the second guide portion 23. Compared with the safety buckle without a guide structure (such as Figure 7g As shown in the figure, the first guide portion 14 and the second guide portion 23 are provided to enhance the stability of the slot 221 when sliding relative to the plug-in portion 11 along the first direction, and effectively prevent the elastic arms 111 on both sides from being subjected to uneven forces, which causes the female buckle 2 to deflect relative to the first direction, resulting in accidental detachment. Since the elastic arms 111 on both sides can be subjected to balanced forces and prevent deflection, the possibility of destructive deformation of the safety buckle 100 is further reduced.

[0152] like Figure 4-7f As shown, the male buckle 1 and the female buckle 2 can guide the movement of the slot 221 relative to the plug-in portion 11 along the first direction through the cooperation between the plug-in protrusion 112 and the slide groove 13, and can also guide the movement of the slot 221 relative to the plug-in portion 11 along the first direction through the cooperation between the first guide portion 14 and the second guide portion 23. Among them, the first guide portion 14 and the second guide portion 23 can play a major guiding role, and the slide groove 13 can play an auxiliary guiding role, or in other words, the slide groove 13 is used for rough guidance, and the first guide portion 14 and the second guide portion 23 are used for fine guidance.

[0153] In some exemplary embodiments, Figure 4-7f As shown, the first guide portion 14 is arranged on the male buckle body 12, and the second guide portion 23 is arranged at one end of the female buckle 2 close to the plug-in mating portion 22, and one of the first guide portion 14 and the second guide portion 23 includes at least one guide groove, and the other includes at least one guide protrusion that corresponds one-to-one with the at least one guide groove.

[0154] The first guide portion 14 and the second guide portion 23 can be provided together with the stopper formed by the first stopper portion 18 and the second stopper portion 28 (eg, Figure 7a-7e Alternatively, it can also be provided without the first stopper 18 and the second stopper 28 forming a stopper cooperation but with the first anchor 3 acting as a stopper for the female buckle 2 (as shown in FIG. Figure 4-Figure 7 and Figure 7f In addition, the number of each of the first guide portion 14 and the second guide portion 23 may be one (as shown in FIG. Figure 7a-7c as shown) or more (as Figure 4-Figure 7 and Figure 7d-7f shown).

[0155] For example, in one embodiment, Figure 7aAs shown, in the case of the stopper formed by the first stopper 18 and the second stopper 28, a first guide portion 14 and a second guide portion 23 may also be provided. The first guide portion 14 may be provided at the middle position of the lower end of the male buckle body 12, and the second guide portion 23 may be provided at the middle position of the plug-in fitting portion 22 of the female buckle 2. The first guide portion 14 and the second guide portion 23 may be provided vertically, and the second stopper 28 formed on the upper end surface of the female buckle 2 may abut against the first stopper 18 formed on the step surface of the male buckle body 12. The first guide portion 14 may be a guide protrusion, and the second guide portion 23 may be a guide groove; and vice versa.

[0156] In one embodiment, if Figure 7b As shown, relative to Figure 7a In the embodiment shown, the first stopper 18 of the male buckle 1 is closer to the mounting groove 16 that is mounted and matched with the first anchor 3, and the first stopper 18 can be substantially flush with the bottom of the first anchor 3, so that the lengths of the first guide portion 14 and the second guide portion 23 can be increased, so that the guiding performance of the male buckle 1 and the female buckle 2 is better. An avoidance recess can be provided at the top of the female buckle 2 to prevent the top of the female buckle 2 from contacting the bottom of the first anchor 3.

[0157] In one embodiment, if Figure 7c As shown, relative to Figure 7b In the embodiment shown, no avoidance recess is provided on the top of the female buckle 2, so that the lower part of the first anchor 3 contacts the top of the female buckle 2, thereby giving the female buckle 2 a certain pre-tightening force to prevent the female buckle 2 from shaking during use.

[0158] In one embodiment, if Figure 7d As shown, relative to Figure 7c In the embodiment shown, the male buckle body 12 may be provided with two first guide portions 14 (e.g., two guide protrusions) spaced apart and parallel to each other, and the two guide protrusions are symmetrically arranged along the vertical direction. The female buckle 2 may be provided with two second guide portions 23 (e.g., two guide grooves) spaced apart accordingly. Figure 7c In the embodiment shown, since the guide groove passes through the contact point between the lower portion of the first anchor 3 and the top of the female buckle 2, the contact line (or contact surface) between the lower portion of the first anchor 3 and the top of the female buckle 2 along the front-to-back direction is relatively short. Figure 7d In the embodiment shown, since two guide portions 14 are arranged at intervals, the guide groove does not pass through the contact point between the lower portion of the first anchor 3 and the top of the female buckle 2, Figure 7d In the embodiment shown, the contact line between the first anchor 3 and the female buckle 2 is Figure 7c In the illustrated embodiment, the contact line (or contact surface) between the first anchor 3 and the female buckle 2 along the front-to-back direction is long, thereby being able to improve the pre-tightening performance of the first anchor 3 on the female buckle 2.

[0159] In one embodiment, if Figure 7e As shown, relative to Figure 7d In the embodiment shown, the spacing between the two guide protrusions and the two guide grooves along the left-right direction is larger, so that the effective width of the contact line (or contact surface) between the lower part of the first anchor 3 and the top of the female buckle 2 along the left-right direction is wider, thereby improving the pre-tightening performance of the first anchor 3 on the female buckle 2, thereby improving the reliability of the safety buckle 100. In some exemplary embodiments, such as Figure 4-Figure 7 and Figure 7f As shown, the male buckle 1 is provided with two first guide portions 14 (such as two guide protrusions), and the female buckle 2 is provided with two second guide portions 23 (such as two guide grooves), and the two guide protrusions and the two guide grooves are slidably matched one by one to guide the movement of the slot 221 relative to the plug-in portion 11 along the first direction. A spacing protrusion 26 is provided between two adjacent guide grooves, and the spacing protrusion 26 is configured to abut against the first anchor 3 when the slot 221 is plugged into the plug-in portion 11. In addition, in some exemplary embodiments, the number of each of the guide protrusions and guide grooves can also be three or more, and a spacing protrusion is provided between any two adjacent guide grooves, and at least one spacing protrusion is configured to abut against the first anchor when the slot is plugged into the plug-in portion. Figure 7a-7e Compared to the embodiment shown, Figure 4-Figure 7 and Figure 7f In the embodiment shown, the male buckle 1 is not provided with a first stopper, but the first anchor 3 serves as a stopper for the female buckle 2. This design can provide a guide portion to prevent deflection while utilizing the structure of the first anchor 3 itself to play a stopper role to prevent accidental detachment. In addition, utilizing the structure of the first anchor 3 itself to play a stopper role avoids providing a first stopper on the male buckle 1, which is conducive to simplifying the structure of the male buckle 1. When the male buckle 1 is formed by injection molding, the simplified structure of the male buckle 1 can make the injection mold simpler; and because the structure of the first anchor 3 itself is utilized to play the above-mentioned stopper role, it is possible to avoid the need to provide a separate stopper structure, which is conducive to reducing the number of injection molded parts.

[0160] In some exemplary embodiments, Figure 5 and Figure 8 As shown, the male buckle body 12 is provided with a mounting groove 16 , and the spacing S between the plug-in protrusion 112 and the mounting groove 16 along the first direction is set to be no less than the width W2 of the plug-in mating portion 22 along the first direction.

[0161] When the female buckle 2 is installed in the male buckle 1, after the mounting groove 16 of the male buckle 1 coincides with the first anchor 3 and the first anchor 3 passes through the mounting groove 16 of the male buckle 1, since the vertical spacing S between the plug-in protrusion 112 and the mounting groove 16 is not less than the vertical width W2 of the plug-in fitting portion 22, the plug-in fitting portion 22 of the female buckle 2 can be inserted between the plug-in protrusion 112 and the mounting groove 16, and then slide along the first direction to the plug-in fitting state with the male buckle 1; then the male buckle 1 can be rotated so that the first anchor 3 and the male buckle 1 are stop-fitted, and the first anchor 3 abuts against the abutment surface 25 of the female buckle 2.

[0162] In some exemplary embodiments, according to relevant standards, the release force when the safety buckle 100 is released (i.e., the female buckle 2 in the plugged state moves relative to the male buckle 1 along the first direction to separate the male buckle 1 and the female buckle 2) should be between 150N and 250N, and the middle value of 200N can be taken as the target release force. The design parameters of the safety buckle 100 can be adjusted to adjust the release force value of the safety buckle 100 to an embodiment as close as possible to the target release force of 200N. Among them, the way to adjust the release force value of the safety buckle 100 includes: Figure 5 and Figure 8 As shown, the plug-in protrusion 112 may be wedge-shaped, and along the first direction, the height of the plug-in protrusion 112 protruding from the elastic arm 111 gradually increases, and the shape of the slot 221 is set to be a wedge-shaped groove that matches the shape of the plug-in protrusion 112; and / or, as Fig.12 As shown, the connection portion between the elastic arm 111 and the male buckle body 12 is provided with a rounded chamfer 113; and / or, as shown Fig.12 As shown, a connecting rib 114 may be connected between the middle of the elastic arm 111 and the male buckle body 12; and / or, the wall thickness of the elastic arm 111 is greater than the wall thickness of the male buckle body 12; and / or, as shown Figure 5 As shown, the elastic arm 111 and the male buckle body 12 are integrally formed, and a connecting rib 115 is provided between the end of the elastic arm 111 away from the plug-in protrusion 112 and the male buckle body 12 .

[0163] In one embodiment of the safety buckle 100, the material used for the male buckle 1 is adjusted, such as a raw material with greater strength, so that the release force of the safety buckle 100 when released approaches the target release force. In another embodiment of the safety buckle 100, the thickness of the elastic arms 111 on both sides of the male buckle 1 is adjusted, such as increasing the thickness of the elastic arms 111 to change the ease of elastic deformation of the elastic arms 111, so that the release force of the safety buckle 100 when released approaches the target release force. Fig.12The safety buckle 100 of the illustrated embodiment is provided with rounded chamfers 113 at the two connecting parts between the upper ends of the two elastic arms 111 and the male buckle body 12, so that the release force of the safety buckle 100 when released approaches the target release force. The safety buckle 100 of another embodiment increases the size of the plug-in protrusion 112, such as increasing the height of the wedge-shaped plug-in protrusion 112 protruding from the elastic arm 111, so that the release force of the safety buckle 100 when released approaches the target release force. The safety buckle 100 of another embodiment can adjust the length of the elastic arm 111, such as shortening the length of the elastic arm 111, so that the release force of the safety buckle 100 when released approaches the target release force. Fig.12 In the safety buckle 100 of the illustrated embodiment, one end of the two elastic arms 111 are connected to the male buckle body 12, and the other end is provided with an insertion protrusion 112. Connecting ribs 114 are respectively connected between the middle parts of the two elastic arms 111 located between the two ends and the male buckle body 12, so that the release force of the safety buckle 100 when released approaches the target release force. Figure 5 The safety buckle 100 of the illustrated embodiment is provided with a connecting rib 115 between the end of the elastic arm 111 away from the plug-in protrusion 112 and the male buckle body 12, so that the connecting rib 115 partially fills the gap between the elastic arm 111 and the male buckle body 12, and the effective length of the elastic arm 111 can be adjusted by adjusting the dimension of the connecting rib 115 along the first direction (the effective length of the elastic arm 111 can be the length of the elastic arm 111 on the side of the connecting rib 115 close to the plug-in protrusion 112, which can be equal to the length of the elastic arm 111 along the first direction minus the length of the connecting rib 115 along the first direction), thereby changing the length of the gap between the elastic arm 111 and the male buckle body 12, so that the release force when the safety buckle 100 is released approaches the target release force.

[0164] Among them, if the release force value of the safety buckle 100 is less than the target release force, the length of the connecting rib 115 can be increased to shorten the effective length of the elastic arm 111, thereby increasing the magnitude of the release force value of the safety buckle 100, so that the release force of the safety buckle 100 approaches the target release force; conversely, if the release force value of the safety buckle 100 is greater than the target release force, the length of the connecting rib 115 can be reduced to increase the effective length of the elastic arm 111, thereby reducing the magnitude of the release force value, so that the release force of the safety buckle 100 approaches the target release force. By controlling the length of the connecting rib 115, the effective length of the elastic arm 111 and the value of the release force of the safety buckle 100 can be adjusted, and therefore, the connecting rib 115 can be called a release force value adjustment unit.

[0165] use Figure 5In the embodiment, by controlling the length of the connecting rib 115, the release force value can be conveniently fine-tuned, and the release force value can also be adjusted over a large range. Therefore, the connecting rib 115 is set at this specific position, so that by simply adjusting the length of the connecting rib 115, the destructive force value of the safety buckle 100 with different sizes, materials, and safety standards can be adjusted to meet specific standards or requirements; and the adjustment of the length of the connecting rib 115 can be easily achieved by adjusting the mold. Therefore, the structure and process are relatively simple to implement.

[0166] On the basis that the abutting surface 25 of the female buckle 2 abuts and cooperates with the first anchor 3 to prevent the male buckle 1 and the female buckle 2 from separating along the second direction, or the first stopper 18 cooperates with the second stopper 28 to prevent the male buckle 1 and the female buckle 2 from separating along the second direction, as Figure 13-14f As shown, the male buckle body 12 has a first supporting surface 19, and the first supporting surface 19 is configured to contact a portion of the female buckle 2 when the slot 221 is plugged into the plug-in portion 11. The male buckle 1 may also be provided with a third stop portion 110, and the female buckle 2 may also be provided with a fourth stop portion 210. The third stop portion 110 and the fourth stop portion 210 are configured to be able to stop and cooperate to prevent the plug-in mating portion 22 from moving in a direction perpendicular to the first supporting surface 19 in a direction away from the male buckle body 12 (i.e., Fig.13 and Fig.14 The paper may move outward perpendicular to the paper surface or in the direction perpendicular to the paper surface toward the reader), resulting in accidental detachment.

[0167] When the external force on the female buckle 2 has a component in the direction away from the male buckle body 12, the plug-in mating portion 22 may move in the direction away from the male buckle body 12 (along the Fig.13 The female buckle 2 may move in a direction perpendicular to the paper plane outward or in a forward direction perpendicular to the paper plane toward the reader), thereby accidentally detaching from the male buckle 1. For this purpose, a third stopper 110 and a fourth stopper 210 are provided to prevent the female buckle 2 from moving in a direction away from the male buckle body 12 and accidentally detaching from the male buckle 1.

[0168] In some exemplary embodiments, Figure 13-Figure 13a As shown, the third stop portion 110 includes a stop protrusion arranged on the end surface of the elastic arm 111 away from the male buckle body 12, and the fourth stop portion 210 includes a stop surface formed by the end surface of the plug-in mating portion 22 away from the male buckle body 12.

[0169] like Figure 13-Figure 13a As shown, the front end faces of the two elastic arms 111 are provided with stop protrusions, and the front end face of the plug-in mating portion 22 forms a stop surface. When the plug-in mating portion 22 and the plug-in portion 11 are in a plug-in mating state, the two stop protrusions of the male buckle 1 abut against the stop surface of the female buckle 2 from the front side of the stop surface of the female buckle 2 to prevent the female buckle 2 from accidentally detaching from the male buckle 1 from the front side.

[0170] In some other exemplary embodiments, Figure 14-14b As shown, the third stop portion 110 includes a stop protrusion arranged on the elastic arm 111, the stop protrusion and the plug-in protrusion 112 are arranged on the same end face of the elastic arm 111, and the stop protrusion is located on the side of the plug-in protrusion 112 away from the male buckle body 12, and the fourth stop portion 210 includes a stop groove arranged on the end face of the plug-in mating portion 22 away from the male buckle body 12.

[0171] like Figure 14-14b As shown, one stop protrusion can be provided on the right side surface of the elastic arm 111 of the left plug-in portion 11, and the other stop protrusion can be provided on the left side surface of the elastic arm 111 of the right plug-in portion 11, and the left and right sides of the front end surface of the plug-in mating portion 22 of the female buckle 2 are provided with stop grooves to respectively cooperate with the two stop protrusions. When the plug-in mating portion 22 and the plug-in portion 11 are in a plug-in mating state, the stop protrusion of the male buckle 1 abuts against the stop groove of the female buckle 2 from the front side of the stop groove of the female buckle 2 to prevent the female buckle 2 from accidentally detaching from the male buckle 1 from the front side.

[0172] In some exemplary embodiments, Figure 14c-14d As shown, the third stop portion 110 is arranged on the first guide portion 14 of the male buckle 1, and the fourth stop portion 210 is arranged on the second guide portion 23 of the female buckle 2, and one of the third stop portion 110 and the fourth stop portion 210 is a stop hook, and the other is a hook matching portion.

[0173] The third stopper 110 of the male buckle 1 and the fourth stopper 210 of the female buckle 2 are respectively a stopper hook and a hook matching part, for example, the third stopper 110 can be set as a stopper hook, and the fourth stopper 210 can be set as a hook matching part. When the plug-in matching part 22 and the plug-in part 11 are in a plug-in matching state, the stopper hook and the hook matching part hook each other to prevent the female buckle 2 from accidentally detaching from the male buckle 1 from the front side.

[0174] In some further exemplary embodiments, Figure 14e-Figure 14f As shown, the third stop portion 110 is disposed on the male buckle body 12, and the fourth stop portion 210 is disposed on the plug-in mating portion 22, and one of the third stop portion 110 and the fourth stop portion 210 is a stop hook, and the other is a hook mating portion.

[0175] The third stopper 110 is disposed on both sides of the male buckle body 12, and the fourth stopper 210 is disposed on both sides of the plug-in mating portion 22, and the third stopper 110 and the fourth stopper 210 can be a stopper hook and a hook mating portion, respectively. When the plug-in mating portion 22 is in a plug-in mating state with the plug-in portion 11, the stopper hook and the hook mating portion hook each other to prevent the female buckle 2 from accidentally detaching from the male buckle 1 from the front side.

[0176] In addition to using the third stopper 110 and the fourth stopper 210 to prevent the female buckle 2 from moving away from the male buckle body 12 and accidentally disengaging from the male buckle 1, other methods can also be used to achieve this. For example, in other exemplary embodiments, Figure 5 and Fig.15 As shown, the male buckle body 12 has a first support surface 19, which is configured to contact a portion of the female buckle 2 when the slot 221 is plugged into the plug-in portion 11, and the female buckle body 21 includes a protruding portion 29 protruding from the male buckle body 12 along a first direction. Fig.15 As shown in the middle solution (b), the length L1 of the first supporting surface 19 along the first direction is greater than the length L2 of the protruding portion 29 of the female buckle 2 along the first direction.

[0177] and Fig.15 In the safety buckle shown in the middle scheme (a), the length of the first support surface 19 of the male buckle body 12 along the first direction is L1', and the length of the protruding portion 29 of the female buckle 2 along the first direction is L2', that is, the vertical length of the first support surface 19 is L1', and the vertical length of the protruding portion 29 of the female buckle 2 is L2', and L2' is greater than L1'. When an external force F is applied to the lower end surface of the female buckle 2, a lever structure with the contact point O between the lower end of the first support surface 19 and the female buckle 2 as the fulcrum can be formed between the male buckle 1 and the female buckle 2, and the lever structure can be a force-saving lever, resulting in the risk of the female buckle 2 accidentally detaching from the male buckle 1 from the front side after the lower end of the female buckle 2 is subjected to the external force F.

[0178] and Fig.15 Compared with the safety buckle shown in the middle scheme (a), Fig.15 The safety buckle shown in the middle scheme (b) has the same female buckle 2, and increases the length of the first support surface 19 of the male buckle body 12 along the first direction, that is, increases the vertical length of the first support surface 19 of the male buckle body 12, so that the vertical length of the first support surface 19 increases from L1' to L1. Fig.15 As shown in the middle scheme (b), the first support surface 19 with a length of L1 increases the support area of ​​the male buckle 1 to the female buckle 2, so that the length L1 of the first support surface 19 along the first direction is greater than the length L2 of the protruding portion 29 of the female buckle 2 along the first direction, that is, the vertical support length L1 of the first support surface 19 to the female buckle 2 is greater than the vertical length L2 of the unsupported protruding portion 29 of the female buckle 2. The increase of the first support surface 19 causes the contact point O of the lower end of the male buckle body 12 to the female buckle 2 to move (move downward). According to the principle of lever, since the distance L2 from the lower end of the female buckle 2 protruding from the male buckle body 12 to the fulcrum O becomes smaller than L2', and the distance L1 from the upper end face of the female buckle 2 supported on the first support surface 19 to the fulcrum O increases compared to L1', the lever formed between the male buckle 1 and the female buckle is Fig.15 The labor-saving lever shown in solution (a) becomes Fig.15The forceful lever shown in the middle solution (b) can prevent the female buckle 2 from accidentally detaching from the male buckle 1 from the front side after the lower end of the female buckle 2 is subjected to force.

[0179] In some exemplary embodiments, Figure 4 and Figure 5 As shown, the male buckle 1 further comprises a first connection portion 17 connected to the male buckle body 12, and the first connection portion 17 is configured to be connected to the strip. The first connection portion 17 may be provided with a connection hole for the strip to pass through.

[0180] In some exemplary embodiments, Figure 6 and Figure 7 As shown, the female buckle 2 also includes a second connecting portion 27 connected to the female buckle body 21, and the second connecting portion 27 is configured to be connected to the strip. The second connecting portion 27 may be provided with a connecting hole for the strip to pass through.

[0181] The first connection portion 17 of the male buckle 1 and the second connection portion 27 of the female buckle 2 can be connected to a strap (such as the first strap of the strap assembly 200 described below), so that the straps can be detachably connected together through the male buckle 1 and the female buckle 2.

[0182] The safety buckle 100 described in the above embodiment can be applied to many occasions, such as safety helmets, baby strollers, safety seats, work badges, etc.

[0183] like Fig.16 and Fig.17a As shown, an embodiment of the present application also provides a strap assembly 200, comprising a first strap and a safety buckle 100 described in any one of the aforementioned embodiments, one end of the first strap being configured to be connected to one of the male buckle 1 and the female buckle 2 of the safety buckle 100.

[0184] Among them, when the strap assembly 200 is used for a safety helmet, one end of the first strap can be connected to one of the male buckle 1 and the female buckle 2 that is not provided with the installation groove 16, and the other one of the male buckle 1 and the female buckle 2 that is provided with the installation groove 16 can be fixed to the first anchor 3 of the safety helmet.

[0185] In some exemplary embodiments, Fig.16 and Fig.17a As shown, the other end of the first strap is configured to be connected to the other of the male buckle 1 and the female buckle 2 of the safety buckle 100 , that is, the two ends of the first strap are respectively connected to the male buckle 1 and the female buckle 2 of the safety buckle 100 . Fig.16 In the embodiment, the male buckle 1 and the female buckle 2 respectively connected to the two ends of the first belt are in a plug-in state; Fig.17a In the embodiment, the male buckle 1 and the female buckle 2 respectively connected to the two ends of the first belt are in a separated state.

[0186] The two ends of the first strap are detachably connected together through the male buckle 1 and the female buckle 2 of the safety buckle 100, which can not only meet the use requirements of the strap assembly 200, but also can separate the male buckle 1 and the female buckle 2 when the first strap is subjected to a certain tension, thereby meeting safety requirements.

[0187] Of course, the strap assembly 200 can also be used in other situations besides safety helmets, such as: when the strap assembly 200 is used to hang a work badge, the two ends of the first strap can be respectively connected to the male buckle 1 and the female buckle 2 of the safety buckle 100, and the male buckle 1 and the female buckle 2 of the mounting buckle 100 do not need to be provided with a mounting groove 16 to be fixed to the first anchor 3.

[0188] In some exemplary embodiments, Fig.17a , Fig.18 and Fig.19 As shown, the strip assembly 200 further includes a fixing plate 41 , which is configured to be fixed to the second anchor 5 , and the fixing plate 41 is provided with two through holes 411 , through which the middle portion of the first strip passes in sequence.

[0189] like Fig.18 As shown, the fixing plate 41 is roughly rectangular; Fig.17a and Fig.19 As shown, the middle portion of the first strap can pass through the two through holes 411 of the fixing plate 41 and can slide in the through holes 411 .

[0190] In some exemplary embodiments, Fig.17a As shown, the first strip includes a first portion 42 located between the male buckle 1 and the fixing plate 41, and a second portion 43 located between the female buckle 2 and the fixing plate 41. The first strip is configured to slide along the through hole 411 to adjust the length of the first portion 42 and the second portion 43.

[0191] When the strap assembly 200 can be used for a helmet, the mounting groove 16 of the male buckle 1 of the safety buckle 100 can be fixed to the first anchor 3 of the helmet, the fixing plate 41 can be fixed to the second anchor 5 of the helmet, and one of the first part 42 and the second part 43 can pass over the top of the wearer's head, and the other of the first part 42 and the second part 43 is configured to pass over the wearer's chin, so that the first anchor 3 is simultaneously subjected to the upward and downward pulling forces applied by the first part 42 and the second part 43, and the two pulling forces are almost equal. Since the above two pulling forces offset each other, even when the first strap is subjected to a large external force, the cap lining 7 with the first anchor 3 installed is not easy to deform, and the first anchor 3 with the safety buckle 100 installed is not easy to be destructively deformed.

[0192] By sliding the first strap along the perforation 411, the lengths of the first portion 42 and the second portion 43 can be adjusted, so that the first portion 42 and the second portion 43 are at an ideal length to meet the needs of practical applications. For example, when the strap assembly 200 can be used for a safety helmet, the lengths of the first portion 42 and the second portion 43 can be adjusted so that the first portion 42 can completely cover the top of the wearer's head, that is, the first portion 42 can completely fit the top of the head.

[0193] In some exemplary embodiments, Fig.18 and Fig.19 As shown, the through hole 411 passes through the first plate surface 412 and the second plate surface 413 which are arranged opposite to each other of the fixed plate 41, and the portion of the first strip located between the two through holes 411 faces the second plate surface 413; the second plate surface 413 is provided with a supporting rib 414, which is located between the two through holes 411 and supports the first strip.

[0194] The supporting ribs 414 support the first strip so that the first strip is at a certain distance from the second plate surface 413 to avoid the protruding structure (such as the second anchor 5) protruding from the second plate surface 413 and located between the supporting ribs 414, thereby preventing the strip from rubbing against the protruding structure.

[0195] In some exemplary embodiments, Fig.18 and Fig.19 As shown, the fixing plate 41 is provided with a fixing hole 415, the fixing hole 415 passes through the first plate surface 412 and the second plate surface 413, the fixing hole 415 is an elongated slot, and the shape of the fixing hole 415 is configured to match the shape of the second anchor 5. The shape of the second anchor 5 can be the same as that of the first anchor 3, and the shape of the fixing hole 415 can be the same as that of the mounting slot 16 of the male buckle 1 of the safety buckle 100.

[0196] like Fig.19 As shown, the fixing plate 41 is configured to rotate relative to the second anchor 5 by a second set angle to engage with the second anchor 5 after the second anchor 5 passes through the fixing hole 415 in the direction from the first plate surface 412 to the second plate surface 413 .

[0197] The fixing operation process of the fixing plate 41 and the second anchor 5 is similar to the aforementioned process of installing the male buckle 1 to the first anchor 3, and will not be described in detail here.

[0198] like Fig.19 As shown, the height of the supporting rib 414 protruding from the second plate surface 413 is set to be greater than the height of the second anchor 5 protruding from the second plate surface 413 that cooperates with the stopper of the fixing plate 41, so that the first strip supported by the supporting rib 414 does not interfere with the second anchor 5.

[0199] In some exemplary embodiments, Fig.16 and Fig.17a As shown, the first strip is provided with a limiting portion 44, which is located on a side of a through hole 411 away from another through hole 411, and the limiting portion 44 is configured to cooperate with the through hole 411 to stop and limit the first strip.

[0200] The limiting portion 44 has sufficient thickness, so it cannot pass through the perforation 411, thereby limiting the maximum length of the first portion 42 and the second portion 43, avoiding the first portion 42 and the second portion 43 being too long or too short to affect the aesthetics, and avoiding the time-consuming process of adjusting the too long or too short first portion 42 and the second portion 43 to the ideal length. In addition, based on the structural setting of the strip assembly of the embodiment of the present application, it can be achieved that when performing a release force value test, the first portion 42 of the first strip can be regarded as rigid, which is conducive to improving the stability of the release force value.

[0201] In some exemplary embodiments, a portion of the first strip is folded and fixed to form the stopper 44 .

[0202] like Fig.17a As shown, a portion of the first strip is folded and the folded portion is fixed (e.g., sewn) to form a stopper 44. The stopper 44 can be formed by a first portion 42 between the fixing plate 41 and the male buckle 1. Of course, the stopper 44 can also be formed by a second portion 43 between the fixing plate 41 and the female buckle 2.

[0203] This solution realizes the stop and limit function of the first belt in a simple manner without adding additional components, and has a simple structure and is easy to implement.

[0204] In some exemplary embodiments, the first strip is a single strip that is continuous and integrated.

[0205] In some other exemplary embodiments, Fig.17a and Fig.17b As shown, the first strip includes two sub-strips, namely a first sub-strip 45 and a second sub-strip 46. One end of the first sub-strip 45 is connected to the male buckle 1, one end of the second sub-strip 46 is connected to the female buckle 2, and the other end of the second sub-strip 46 passes through the two through holes 411 of the fixing plate 41 in sequence and is connected to the other end of the first sub-strip 45, wherein a limiting portion 44 is formed at the connection position between the first sub-strip 45 and the second sub-strip 46.

[0206] The first strip includes two sub-strips, one end of the first sub-strip 45 and the second sub-strip 46 are connected to the male buckle 1 and the female buckle 2 respectively, and the other end of the second sub-strip 46 is connected to the other end of the first sub-strip 45 after passing through the two through holes 411 of the fixing plate 41 in sequence, and a stopper 44 can be formed at the connection position of the first sub-strip 45 and the second sub-strip 46. The other end of the first sub-strip 45 can overlap with the other end of the second sub-strip 46, and they are connected and fixed by sewing, and the overlapped position of the other end of the first sub-strip 45 and the other end of the second sub-strip 46 can form a stopper 44. Alternatively, the other end of at least one of the first sub-strip 45 and the second sub-strip 46 can be folded, and the first sub-strip 45 and the second sub-strip 46 are connected and fixed by sewing at the folded position, and the folded position can form a stopper 44.

[0207] In the first strip including two sub-strips, the first sub-strip 45 as a whole and the portion between the other end of the second sub-strip 46 and the fixed plate 41 can jointly form the first portion 42 of the first strip, and the portion between the one end of the second sub-strip 46 and the fixed plate 41 can form the second portion 43 of the first strip.

[0208] The two sub-strips of the first strip may have different appearances and / or materials to meet the aesthetic or other requirements (such as strength requirements, low cost requirements, etc.) according to actual needs. Alternatively, the two sub-strips of the first strip may have the same appearance and / or material to meet actual needs.

[0209] It should be understood that the first strap is not limited to the perforations that can pass through the fixing plate in the above-mentioned embodiments, and the two ends are respectively connected to the male buckle and the female buckle. For example, in some other exemplary embodiments, the strap assembly further includes a fixing plate, one end of the first strap can be connected to one of the male buckle and the female buckle that is not provided with a mounting groove, and the other end of the first strap is connected to the fixing plate, and the fixing plate is configured to be fixed to the second anchor. In this embodiment, one end of the first strap can be connected to one of the male buckle and the female buckle that is not provided with a mounting groove, and the other end can be connected to the fixing plate, and one of the male buckle and the female buckle that is provided with a mounting groove, and the fixing plate can be respectively fixed to the first anchor and the second anchor. When the strap assembly is used for a safety helmet, the first strap can be used as a chin strap that passes around the wearer's chin.

[0210] like Figure 20-Figure 25 As shown, an embodiment of the present application also provides a safety helmet, comprising a safety helmet body and the strap assembly 200 as described in any of the aforementioned embodiments, the safety helmet body is provided with a first anchor 3 and a second anchor 5, one of the male buckle 1 and the female buckle 2 of the safety buckle 100 of the strap assembly 200 is fixed to the first anchor 3, and the fixing plate 41 of the strap assembly 200 is fixed to the second anchor 5.

[0211] In the helmet, the male buckle 1 of the safety buckle 100 can be fixed to the first anchor 3, the fixing plate 41 can be fixed to the second anchor 5, and the first strap can slide relative to the through hole 411 of the fixing plate 41 to adjust the length of the first part 42 and the second part 43, so that the strap is more suitable for the user's head and more comfortable for the user to wear. When the first strap of the strap assembly 200 is subjected to an external force greater than a certain value, the male buckle 1 and the female buckle 2 of the safety buckle 100 will automatically disengage, so that the first strap is automatically disconnected, thereby avoiding the first strap tightening the wearer's neck to cause physical damage, and ensuring the wearer's safety.

[0212] In some exemplary embodiments, Figure 20-Figure 25 As shown, the helmet body includes a helmet shell 6 and a cap lining 7 fixed to the helmet shell 6, and the first anchor 3 and the second anchor 5 are provided on the cap lining 7 and are spaced 180 degrees apart.

[0213] When the wearer wears the safety helmet, the first anchor 3 and the second anchor 5, which are 180 degrees apart, can be located on the left and right sides of the wearer's head, so that the safety helmet can be stably worn on the wearer's head, avoiding the problem of the safety helmet tilting forward due to the forward position of the first anchor 3 and the second anchor 5, or the problem of the safety helmet tilting backward due to the rearward position of the first anchor 3 and the second anchor 5.

[0214] In some exemplary embodiments, the middle portion of the first strip of the strip assembly 200 may pass through the through hole 411 of the fixing plate 41, and the two ends of the first strip are respectively connected to the male buckle 1 and the female buckle 2. Fig. 22 and Fig.23 As shown, one of the first portion 42 and the second portion 43 of the first strap is arranged to pass around the top of the wearer's head, and the other of the first portion 42 and the second portion 43 of the first strap is arranged to pass around the chin of the wearer.

[0215] Among them, Fig. 22 and Fig.23 As shown, the helmet may further include at least one second strap 8, both ends of which are connected to the helmet body, one of the first portion 42 and the second portion 43 of the first strap, and the second strap 8 are arranged to pass around the top of the wearer's head, and the other of the first portion 42 and the second portion 43 of the first strap is arranged to pass around the chin of the wearer.

[0216] like Fig. 22 and Fig.23As shown, the second strips 8 may be provided with two or other numbers, and the two ends of the second strips 8 are respectively connected to the cap lining 7 of the helmet body. The second strips 8 may be a top strip, and the two second strips 8 and the first portion 42 of the first strip may be passed around the top of the wearer's head, and the second portion 43 of the first strip may be passed around the chin of the wearer. Since the lengths of the first portion 42 and the second portion 43 are adjustable, the lengths of the two second strips 8 and the first portion 42 may be matched, and both may contact the top of the wearer's head, so that the helmet can be firmly worn on the wearer's head.

[0217] The second strap 8 cooperates with the first strap to make the helmet more secure and comfortable to wear and better fit the user's head.

[0218] In other exemplary embodiments, one end of the first strap of the strap assembly 200 can be connected to one of the male buckle 1 and the female buckle 2 that is not provided with the mounting groove 16, and the other end can be connected to the fixing plate 41, and the other one of the male buckle 1 and the female buckle 2 that is provided with the mounting groove, and the fixing plate 41 can be respectively fixed to the first anchor 3 and the second anchor 5 of the cap lining 7. At this time, the first strap is configured to be able to pass around the wearer's chin, that is, the first strap can be used as a chin strap.

[0219] The helmet may further include at least one (such as two, three or more) second straps, both ends of which may be connected to the cap lining 7 of the helmet body, and the second straps may be arranged to pass over the head of the wearer. The second straps cooperate with the first straps to make the helmet more secure to wear.

[0220] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0221] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme defined by the claims. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0222] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

Claims

1. A safety buckle, characterized in that: include: A male buckle, including a plug portion; and A female buckle, comprising a slot, wherein the slot is configured to be movable relative to the plug-in portion along a first direction to be plugged and matched with the plug-in portion so that the male buckle and the female buckle are locked with each other; At least one of the plug-in portion and the slot is configured to be elastically deformable when the safety buckle is subjected to an external force within a set range, so that the slot in a plug-in mating state can continue to move along the first direction relative to the plug-in portion to separate from the plug-in portion.

2. The safety buckle according to claim 1, characterized in that: The male buckle also includes a male buckle body, and the plug-in portion includes an elastic arm connected to the male buckle body at one end and a plug-in protrusion arranged at the other end of the elastic arm, the plug-in protrusion is arranged to be able to be plugged into and cooperate with the slot, and the elastic arm is arranged to be able to be elastically deformed so that the slot can be separated from the plug-in protrusion.

3. The safety buckle according to claim 2, characterized in that: The female buckle comprises a female buckle body and a plug-in fitting portion arranged at one end of the female buckle body, and the slot is arranged at the plug-in fitting portion.

4. The safety buckle according to claim 3, characterized in that: The plug-in parts are provided with two and are respectively arranged on two opposite sides of the male buckle body, and the plug-in protrusions of the two plug-in parts protrude toward each other; and The slots are provided on both sides of the plug-in mating portion, and the slots on both sides are configured to be plug-fitted with the plug-in protrusions of the two plug-in portions respectively.

5. The safety buckle according to claim 4, characterized in that: A slide groove is formed between the two plug-in parts, and the plug-in matching part is configured to be able to slide in the slide groove relative to the plug-in part along the first direction, so that the plug-in protrusion is plug-matched with the slot.

6. The safety buckle according to claim 3, characterized in that: The male buckle is provided with a first guide portion, and the female buckle is provided with a second guide portion, and the first guide portion and the second guide portion are slidably matched to guide the movement of the slot relative to the plug-in portion along the first direction.

7. The safety buckle according to claim 6, characterized in that: The first guide portion is arranged on the male buckle body, and the second guide portion is arranged at one end of the female buckle close to the plug-in mating portion, and one of the first guide portion and the second guide portion includes at least one guide groove, and the other of the first guide portion and the second guide portion includes at least one guide protrusion that corresponds one-to-one with at least one of the guide grooves.

8. The safety buckle according to claim 3, characterized in that: The male buckle is provided with a first stop portion, and the female buckle is provided with a second stop portion. The first stop portion and the second stop portion are configured to be able to stop and cooperate when the slot and the plug-in portion are plugged in and matched, so as to prevent the slot in the plug-in and matched state from moving relative to the plug-in portion in a second direction opposite to the first direction.

9. The safety buckle according to claim 8, characterized in that: The first stop portion includes a step surface provided on the male buckle body, and the second stop portion includes a stop surface formed by an end surface of the plug-in fitting portion away from one end of the female buckle body.

10. The safety buckle according to claim 3, characterized in that: One of the male buckle and the female buckle is provided with a mounting groove, and the mounting groove is configured to be installed and matched with the first anchor to fix one of the male buckle and the female buckle to the first anchor, and the other of the male buckle and the female buckle is provided with an abutment surface, and the abutment surface is configured to abut against the first anchor when the slot is plugged into the plug-in portion to prevent the slot in the plug-in state from moving relative to the plug-in portion along a second direction opposite to the first direction.

11. The safety buckle according to claim 10, characterized in that: The shape of the mounting groove is configured to match the shape of the first anchor, the mounting groove is an elongated groove, and the width of the mounting groove along the first direction is smaller than the length of the mounting groove along a third direction perpendicular to the first direction; and One of the male buckle and the female buckle is configured to rotate relative to the first anchor by a first set angle to cooperate with the first anchor stop after the first anchor passes through the installation slot, and the abutment surface is configured to be able to abut and cooperate with the first anchor when the slot is plugged into the plug-in portion.

12. The safety buckle according to claim 11, characterized in that: The male buckle body is provided with the installation groove, and the end surface of the plug-in fitting portion away from one end of the female buckle body forms the abutment surface.

13. The safety buckle according to claim 11, characterized in that: The male buckle is provided with a plurality of guide protrusions, and the female buckle is provided with a plurality of guide grooves, and the plurality of guide protrusions and the plurality of guide grooves are slidably matched one by one to guide the movement of the slot relative to the plug-in portion along the first direction; and A spacing convex portion is provided between any two adjacent guide grooves among the plurality of guide grooves, and at least one of the spacing convex portions is configured to abut against the first anchoring member when the slot is plugged into and matched with the plug-in portion.

14. The safety buckle according to claim 11, characterized in that: The male buckle body is provided with the installation groove, and the spacing between the plug-in protrusion and the installation groove along the first direction is set to be no less than the width of the plug-in fitting portion along the first direction.

15. The safety buckle according to any one of claims 2 to 14, characterized in that: The plug-in protrusion is in a wedge shape, and the height of the plug-in protrusion protruding from the elastic arm gradually increases along the first direction, and the shape of the slot is set to be a wedge-shaped slot that matches the shape of the plug-in protrusion; and The elastic arm and the male buckle body are integrally formed, and a connecting rib is provided between one end of the elastic arm away from the plug-in protrusion and the male buckle body.

16. The safety buckle according to any one of claims 2 to 14, characterized in that: The plug-in protrusion is wedge-shaped, and the height of the plug-in protrusion protruding from the elastic arm gradually increases along the first direction, and the shape of the slot is set to be a wedge-shaped groove that matches the shape of the plug-in protrusion; and / or The connection portion between the elastic arm and the male buckle body is provided with a rounded chamfer; and / or A connecting rib is connected between the middle portion of the elastic arm and the male buckle body; and / or The wall thickness of the elastic arm is greater than the wall thickness of the male buckle body.

17. The safety buckle according to any one of claims 3 to 14, characterized in that: The male buckle body has a first supporting surface, and the first supporting surface is configured to contact a portion of the female buckle when the slot is plugged into the plug-in portion; and The male buckle is provided with a third stop portion, and the female buckle is provided with a fourth stop portion. The third stop portion and the fourth stop portion are configured to be able to stop and cooperate to prevent the plug-in fitting portion from moving in a direction perpendicular to the first supporting surface in a direction away from the male buckle body.

18. The safety buckle according to claim 6 or 7, characterized in that: The male buckle body has a first supporting surface, and the first supporting surface is configured to contact a part of the female buckle when the slot is plugged into the plug-in portion. The male buckle is provided with a third stopper, and the female buckle is provided with a fourth stopper. The third stopper and the fourth stopper are configured to be able to stop and cooperate with each other to prevent the plug-in and fitting portion from moving in a direction perpendicular to the first supporting surface in a direction away from the male buckle body, wherein: The third stop portion includes a stop protrusion provided on the end surface of the elastic arm away from the male buckle body, and the fourth stop portion includes a stop surface formed by the end surface of the plug-in mating portion away from the male buckle body; or The third stop portion includes a stop protrusion arranged on the elastic arm, the stop protrusion and the plug-in protrusion are arranged on the same end surface of the elastic arm, and the stop protrusion is located on a side of the plug-in protrusion away from the male buckle body, and the fourth stop portion includes a stop groove arranged on an end surface of the plug-in mating portion away from the male buckle body; or The third stop portion is arranged on the first guide portion, the fourth stop portion is arranged on the second guide portion, and one of the third stop portion and the fourth stop portion is a stop hook, and the other of the third stop portion and the fourth stop portion is a hook matching portion; or The third stop portion is arranged on the male buckle body, the fourth stop portion is arranged on the plug-in fitting portion, and one of the third stop portion and the fourth stop portion is a stop hook, and the other of the third stop portion and the fourth stop portion is a hook fitting portion.

19. The safety buckle according to any one of claims 3 to 14, characterized in that: The male buckle body has a first supporting surface, which is configured to contact a portion of the female buckle when the slot is plugged into the plug-in portion. The female buckle body includes a protruding portion protruding from the male buckle body along the first direction, and the length of the first supporting surface along the first direction is greater than the length of the protruding portion of the female buckle along the first direction.

20. The safety buckle according to any one of claims 3 to 14, characterized in that: The male buckle further comprises a first connection portion connected to the male buckle body, the first connection portion being configured to be connected to a strap; and / or The female buckle further includes a second connection portion connected to the female buckle body, and the second connection portion is configured to be connected to a strap.

21. A strip assembly, characterized in that: The invention comprises a first strap and the safety buckle according to any one of claims 1 to 20, wherein one end of the first strap is configured to be connected to one of a male buckle and a female buckle of the safety buckle.

22. The strap assembly according to claim 21, characterized in that The other end of the first strap is configured to be connected to the other of the male buckle and the female buckle of the safety buckle.

23. The strap assembly according to claim 22, characterized in that The strip assembly also includes a fixing plate, which is configured to be fixed to the second anchoring piece. The fixing plate is provided with two through holes, and the middle portion of the first strip passes through the two through holes in sequence.

24. The strap assembly according to claim 23, characterized in that The first strip includes a first portion located between the male buckle and the fixing plate, and a second portion located between the female buckle and the fixing plate, and the first strip is configured to slide along the through hole to adjust the lengths of the first portion and the second portion.

25. The strap assembly of claim 23, wherein: The through hole penetrates the first plate surface and the second plate surface which are oppositely arranged on the fixing plate, and the portion of the first strip located between the two through holes faces the second plate surface; and The second plate surface is provided with a supporting convex rib, and the supporting convex rib is located between the two through holes and supports the first strip.

26. The strap assembly of claim 25, wherein: The fixing plate is provided with a fixing hole, the fixing hole passes through the first plate surface and the second plate surface, the fixing hole is an elongated slot, and the shape of the fixing hole is configured to match the shape of the second anchoring piece; The fixing plate is configured to rotate relative to the second anchor by a second set angle to engage with the second anchor stop after the second anchor passes through the fixing hole in a direction from the first plate surface to the second plate surface; and The height of the supporting rib protruding from the second plate surface is set to be greater than the height of the second anchor piece cooperating with the fixing plate stopper protruding from the second plate surface.

27. A strap assembly according to any one of claims 23 to 26, characterised in that The first strip is provided with a limiting portion, the limiting portion is located on a side of one of the through holes away from the other through hole, and the limiting portion is configured to cooperate with the through hole to stop and limit the first strip.

28. The strap assembly of claim 27, wherein: A portion of the first strip is folded and fixed to form the limiting portion.

29. The strap assembly of claim 27, wherein: The first strip is a single continuous strip; or The first strip includes two sub-strips, namely a first sub-strip and a second sub-strip, one end of the first sub-strip is connected to the male buckle, one end of the second sub-strip is connected to the female buckle, and the other end of the second sub-strip passes through the two through holes in sequence and is connected to the other end of the first sub-strip, wherein the limiting portion is formed at the connection between the first sub-strip and the second sub-strip.

30. The strap assembly of claim 21, wherein: The strap assembly further comprises a fixing plate, to which the other end of the first strap is connected, and the fixing plate is configured to be fixed to the second anchor.

31. A safety helmet, characterized in that: It comprises a safety helmet body and the strap assembly according to any one of claims 23 to 30, the safety helmet body is provided with a first anchor and a second anchor, one of a male buckle and a female buckle of a safety buckle of the strap assembly is fixed to the first anchor, and a fixing plate of the strap assembly is fixed to the second anchor.

32. The safety helmet according to claim 31, characterized in that: The strap assembly is the strap assembly according to any one of claims 23 to 28, wherein one of the first portion and the second portion of the first strap is arranged to pass around the top of the wearer's head, and the other of the first portion and the second portion is arranged to pass around the wearer's chin; or The strap assembly is the strap assembly according to claim 29, and the first strap is arranged to pass around the chin of the wearer.

33. The safety helmet according to claim 32, characterized in that: The safety helmet further comprises at least one second strap, both ends of which are connected to the safety helmet body, and the second strap is arranged to pass around the top of the wearer's head.

34. A safety helmet according to any one of claims 31 to 33, characterized in that: The helmet body includes a helmet shell and a cap lining fixed to the helmet shell, and the first anchor and the second anchor are provided on the cap lining and are spaced 180 degrees apart.

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