A rigid fastener

Abstract

The utility model discloses a rigid fastener, including fastener base and detachable lock catch. The fastener base is equipped with the base recess of opening, and the back groove wall sets up back wall draw -in groove, the detachable lock catch is equipped with recess plug and is inserted into the base recess, and the plug rear end lower part is equipped with the hook part that cooperates with back wall draw -in groove. Its innovation lies in: when buckling, the interval space is equipped between the base back groove wall and recess plug, and the width size of interval space is less than the convex size of hook part. This structure makes when the tension towards the base front groove wall, the hook part can not get out, prevents misunderstanding lock, and when the lock catch front end is added the unlocking tension of specific direction, and interval space provides the lifting and transverse movement space that the hook part needs to exit back wall draw -in groove, realizes smooth unlocking. The utility model realizes reliable locking and directional unlocking through rigid structure, avoids the fatigue problem of elastic element, and the structure is simple, and the reliability is high, is especially suitable for pet traction rope and other products.

Description

Technical Field

[0001] This utility model relates to pet supplies, and more particularly to a rigid fastener. Background Technology

[0002] With social development and improved living standards, pets (such as dogs) have become important members of many families. In public places such as elevators, parks, and streets, using pet leashes to restrain pets and others has become a common consensus and a necessary measure to ensure the safety of pets and others.

[0003] A typical pet leash usually consists of two main parts: one is the pet harness or collar (collectively referred to as the wearer), which the pet needs to wear; the other is the leash, which is connected to the wearer at one end and is a grip end for the user to hold and lead the pet.

[0004] Some manufacturers have introduced buckle assemblies at the connection between the traction cord and the wearable part to enable quick connection and separation. Currently, the most widely used type on the market is a plastic snap-on buckle (also known as a side-press snap-on buckle or side-opening buckle). The male buckle has elastic latches (or snaps, elastic arms) on both sides. When the female buckle is inserted, the latches on both sides are compressed and retract, then elastically return to their original position and lock into the slot. To unlock, the release part of the latches must be pressed to disengage them from the slot.

[0005] However, these widely used plastic buckles have inherent technical flaws. Their locking and unlocking functions rely heavily on the elasticity of the latch, which, under frequent insertion and removal operations, is subjected to cyclic stress over a long period, making it prone to metal fatigue (if a metal spring is present) or plastic deformation (if the elasticity is inherent in the plastic itself), leading to weakened elasticity or even breakage. More importantly, plastic materials are prone to aging, embrittlement, and decreased strength after prolonged exposure to sunlight, temperature differences, and humidity outdoors, further accelerating the failure of the buckle. Once the locking function of the buckle fails, it will directly lead to pets accidentally getting out of control in public places, causing serious safety hazards such as getting lost, frightening others, or traffic accidents.

[0006] Therefore, given the problems of easy damage, easy aging, and insufficient safety of the plastic buckles commonly used in existing pet leashes, there is an urgent need for a more durable and reliable connection solution.

[0007] The information disclosed in this background section is included only to enhance the understanding of the context of this disclosure, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0008] One objective of this invention is to provide a rigid buckle that can solve the problem that existing elastic buckles for pet leashes are prone to failure due to fatigue and aging.

[0009] To achieve the above objectives, this utility model provides a rigid fastener, comprising:

[0010] The fastener base has an open base groove, the base groove has a front base groove wall and a rear base groove wall that are arranged opposite to each other, wherein the rear base groove wall has a rear wall slot.

[0011] The detachable latch has a recessed insert that is inserted into the recess of the base through the opening of the recess of the base. The lower part of the rear end face of the recessed insert near the rear wall slot has a hook that protrudes toward the rear wall slot.

[0012] in,

[0013] When the detachable latch and the buckle base are engaged, the hook portion is accommodated in the rear wall slot, and there is a gap between the rear slot wall of the base and the recessed block;

[0014] The space is used to provide clearance for the hook to fully exit the rear wall slot when the front end of the detachable latch is lifted upward by an unlocking pull parallel to the opening orientation of the base groove;

[0015] Furthermore, the width of the interval space is smaller than the protrusion of the hook portion, so as to prevent the hook portion from completely exiting the rear wall slot when the detachable latch is subjected to a pulling force toward the front groove wall of the base.

[0016] Optionally, the recessed insert is provided with a magnetic insert component inside, and the bottom of the base recess is provided with a base magnetic insert component for magnetically connecting with the magnetic insert component;

[0017] The base magnetic suction component is located directly below the opening of the base groove and biased towards the side of the rear wall slot. It is used to apply a magnetic force towards the rear and downward to the insertion block magnetic suction component during the fastening process, so that the upper part of the rear end face of the groove insertion block close to the upper edge of the rear wall slot is tightly attached to the upper edge of the rear wall slot, so as to maintain the fastening state of the detachable lock and the fastener base.

[0018] Optionally, one of the insert magnetic component and the base magnetic component is a first magnet, and the other is an iron block or a second magnet with the opposite polarity to the first magnet.

[0019] Optionally, the front groove wall of the base is an inclined surface, and the width dimension from the front groove wall of the base to the rear groove wall of the base gradually decreases from top to bottom.

[0020] Optionally, the detachable latch also includes a latch body located above the recessed insert, the latch body extending rearward to form a rear protrusion for connecting the traction rope.

[0021] Optionally, the latch body protrudes forward to form a forward protrusion for connecting the unlocking pull cord.

[0022] Optionally, the height of the rear wall slot is greater than the height of the hook portion, and the height dimension is parallel to the depth direction of the base groove.

[0023] Optionally, the bottom surface of the hook portion is an inclined surface that slopes upward away from the interval space.

[0024] Optionally, the top surface of the hook portion is an inclined surface that slopes downward away from the gap space.

[0025] Optionally, the upper part of the front end face of the recessed insert near the front groove wall of the base is provided with a front protrusion protruding towards the front groove wall of the base, so that the gap between the upper part of the front end face and the front groove wall of the base is smaller than the gap between the lower part of the front end face and the front groove wall of the base.

[0026] The beneficial effects of this utility model are as follows: It provides a rigid fastener, the working process of which is as follows:

[0027] S10: Snap-fit ​​operation. The user inserts the recessed block into the base recess at a slightly tilted angle, aligning the hook with the rear wall slot. Then, the recessed block is placed into the base recess, gradually shifting from an tilted position to a horizontal position during insertion. Simultaneously, the depth of the hook insertion into the rear wall slot gradually increases. The snap-fit ​​is complete when the bottom surface of the recessed block is flush with the bottom of the base recess. At this point, a gap is formed between the front end of the recessed block near the front wall of the base and the rear wall of the base.

[0028] S20: Unlocking Operation. When it is necessary to separate the detachable latch, the user applies an unlocking pull parallel to the opening of the base recess to the front of the detachable latch (e.g., by pulling the unlocking cord connected to the front of the detachable latch). Due to the existence of the gap space, the recessed block gains lateral movement space during the lifting process, allowing the hook to partially disengage laterally from the rear wall slot. As the lifting continues, the hook gradually disengages from the rear wall slot, and finally the hook completely disengages from the rear wall slot, achieving unlocking.

[0029] S30: Anti-misunderstanding lock mechanism.

[0030] (1) When the pet walks in front of the owner, causing the leash to be straightened (equivalent to the owner pulling the detachable buckle backward through the leash), the hook protrudes backward and inserts into the slot on the back wall. Therefore, in this state, regardless of whether the gap is large or small, the more the pet walks forward, the less likely the detachable buckle will be to come off the buckle base, thus avoiding the buckle detachment problem.

[0031] (2) When the owner walks in front of the pet, causing the leash to be straightened (the owner pulls the detachable buckle forward with the leash), if the width of the gap is too large (for example, the width of the gap is greater than the protrusion of the hook), then the entire hook will be pulled forward out of the rear wall slot, and the detachable buckle will be disengaged from the buckle base; therefore, the width of the gap is smaller than the protrusion of the hook.

[0032] In summary, the rigid buckle provided by this utility model achieves reliable fastening and unlocking through a rigid limiting structure, avoiding the use of elastic components. Therefore, it can solve the problem that existing elastic buckles for pet leashes are prone to failure due to fatigue and aging. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the structure in which the wearable part and the traction rope are connected by a rigid buckle, as provided in the embodiment;

[0035] Figure 2 A schematic diagram of the structure for disassembling the wearable part and the traction rope via a rigid fastener, as provided in the embodiment;

[0036] Figure 3 A schematic diagram of the buckle base and detachable latch provided in the embodiment, viewed from the rear to the front.

[0037] Figure 4 A schematic diagram of the buckle base and detachable latch provided in the embodiment, viewed from front to back;

[0038] Figure 5 This is a cross-sectional schematic diagram of the buckle base and the detachable locking buckle provided in the embodiment.

[0039] In the picture:

[0040] 100a1, Wearing part; 100a2, Traction rope; 100a3, Rigid fastener;

[0041] 1. Buckle base; 101. Base groove; 1011. Front groove wall of base; 1012. Rear groove wall of base; 1012a. Rear wall slot; 102. Base magnetic component;

[0042] 2. Detachable latch; 201. Grooved insert; 2011. Hook; 2012. Front protrusion; 202. Unlocking pull cord; 203. Latch body; 2031. Rear protrusion; 2032. Front protrusion; 204. Magnetic insert.

[0043] 3. Spacing. Detailed Implementation

[0044] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0045] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0046] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0047] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0048] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0049] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0050] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0051] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0052] The direct drive mechanism in this invention can be a linear motor, a cylinder, a hydraulic cylinder, or a motor lead screw and slider assembly, etc.; the rotary drive mechanism can be a servo motor, a stepper motor, or a rotary cylinder, etc.

[0053] This utility model provides a rigid buckle, which mainly achieves reliable fastening and unlocking through a rigid limiting structure, avoiding the use of elastic components, thereby solving the problem of traditional plastic buckles failing due to fatigue and aging. The core lies in the ingenious setting of the interval space, which makes unlocking necessary to be completed in a specific direction, while the pulling force in other directions is effectively limited to prevent accidental locking.

[0054] See Figures 1-5 The rigid fastener 100a3 provided in this embodiment includes:

[0055] The fastener base 1 has a base groove 101 with an open structure. The base groove 101 has a base front groove wall 1011 and a base rear groove wall 1012 that are arranged opposite to each other. The base rear groove wall 1012 has a rear wall slot 1012a.

[0056] The detachable latch 2 is provided with a grooved insert 201 that is inserted into the base groove 101 through the opening of the base groove 101. The grooved insert 201 has a hook portion 2011 protruding toward the rear wall slot 1012a at the lower part of the rear end face of the grooved insert 201 near the rear wall slot 1012a.

[0057] in,

[0058] When the detachable latch 2 and the fastener base 1 are fastened together, the hook part 2011 is accommodated in the rear wall slot 1012a, and a gap space 3 is left between the rear slot wall 1012 of the base and the groove insert 201;

[0059] The interval space 3 is used to provide clearance space for the hook part 2011 to completely exit the rear wall slot 1012a to achieve unlocking when the front end of the detachable latch 2 is lifted upward by an unlocking pull parallel to the opening direction of the base groove 101.

[0060] Furthermore, the width of the interval space 3 is smaller than the protrusion of the hook portion 2011, so as to restrict the hook portion 2011 from completely exiting the rear wall slot 1012a when the detachable latch 2 is subjected to a pulling force toward the front groove wall 1011 of the base.

[0061] Specifically, when applied to pet leashes:

[0062] The buckle base 1 of the rigid buckle 100a3 is fixed on the wearing part 100a1 of the pet leash, and the front groove wall 1011 of the base is close to the head of the pet.

[0063] The detachable locking buckle 2 of the rigid fastener 100a3 is fixed to one end of the traction rope 100a2;

[0064] After the pet wears the wearing part 100a1, fasten the detachable lock 2 onto the buckle base 1, and then the pet can be led by the leash 100a2.

[0065] The design of the interval space 3 is one of the core innovations of this utility model. The width of the interval space 3 is designed to simultaneously achieve reliable locking and convenient unlocking. Specifically, the width of the interval space 3 is smaller than the protrusion of the hook portion 2011. Therefore, when the detachable latch 2 is subjected to a pulling force toward the front groove wall 1011 of the base (such as the pulling force generated when a pet moves forward), the hook portion 2011 cannot completely exit the rear wall groove 1012a, effectively avoiding accidental locking. On the other hand, when unlocking is required, the user applies an unlocking pulling force parallel to the opening of the base groove 101 (such as a roughly vertically upward pulling force). The front end of the detachable latch 2 lifts upward and moves in an oblique upward manner. The interval space 3 provides the necessary lateral movement and lifting space for the hook portion 2011, allowing the hook portion 2011 to completely exit the rear wall groove 1012a.

[0066] The working process of rigid fastener 100a3 is as follows:

[0067] S10: Snap-fit ​​operation. The user inserts the recessed block 201 into the base recess 101 at a slightly tilted angle, aligning the hook portion 2011 with the rear wall slot 1012a. Then, the recessed block 201 is placed into the base recess 101. During insertion, the recessed block 201 gradually changes from an tilted state to a horizontal state, and simultaneously, the depth of the hook portion 2011 inserted into the rear wall slot 1012a gradually increases. When the bottom surface of the recessed block 201 finally adheres to the bottom of the base recess 101, the snap-fit ​​is complete. At this point, a gap space 3 is formed between the front end face of the recessed block 201 near the front wall 1011 of the base and the rear wall 1012 of the base.

[0068] Optionally, the recessed insert 201 is provided with an insert magnetic 204 inside, and the bottom of the base recess 101 is provided with a base magnetic 102 for magnetically connecting with the insert magnetic 204.

[0069] The base magnetic 102 is located directly below the opening of the base groove 101 and biased towards the side of the rear wall slot 1012a. It is used to apply a magnetic attraction force towards the rear and downward to the insert block magnetic 204 during the fastening process, so that the upper part of the groove insert block 201 near the rear end face of the rear wall slot 1012a is in close contact with the upper edge of the rear wall slot 1012a, so as to maintain the fastening state of the detachable lock 2 and the fastener base 1.

[0070] Because there is a magnetic attraction between the recessed insert 201 and the fastener base 1 towards the rear and downward, the recessed insert 201 is automatically attracted to the horizontal position during the fastening process by the magnetic attraction. Moreover, after the fastening is completed, the upper part of the rear end face is close to the upper edge of the rear wall slot 1012a, thereby ensuring that the entire hook part 2011 is fully inserted into the rear wall slot 1012a, and minimizing the possibility of mis-locking.

[0071] Furthermore, one of the insert magnetic absorbing member 204 and the base magnetic absorbing member 102 is a first magnet, and the other is an iron block or a second magnet with the opposite polarity to the first magnet.

[0072] S20: Unlocking Operation. When it is necessary to separate the detachable latch 2, the user applies an unlocking pull force parallel to the opening of the base groove 101 to the front end of the detachable latch 2 (e.g., by pulling the unlocking pull rope 202 connected to the front of the detachable latch 2). Due to the presence of the gap space 3, the groove insert 201 gains lateral movement space during the lifting process, allowing the hook part 2011 to partially exit laterally from the rear wall slot 1012a. As the lifting continues, the hook part 2011 gradually exits the rear wall slot 1012a, and finally the hook part 2011 completely disengages from the rear wall slot 1012a, thus achieving unlocking.

[0073] S30: Anti-misunderstanding lock mechanism.

[0074] (1) When the pet walks in front of the owner, causing the leash 100a2 to be straightened (equivalent to the owner pulling the detachable buckle 2 backward through the leash 100a2), since the hook part 2011 protrudes backward and inserts into the rear wall slot 1012a, in this state, regardless of whether the interval space 3 is large or small, the more the pet walks forward, the less likely the detachable buckle 2 can be separated from the buckle base 1, thereby avoiding the buckle problem;

[0075] (2) When the owner walks in front of the pet, causing the leash 100a2 to be straightened (the owner pulls the detachable lock 2 forward through the leash 100a2), the size design of the gap space 3 reflects the trade-off between "preventing accidental unlocking" and "facilitating unlocking".

[0076] If the width of the interval space 3 is too large (for example, the width of the interval space 3 is greater than the protrusion of the hook part 2011), then the entire hook part 2011 will be pulled forward out of the rear wall slot 1012a, and the detachable lock 2 will disengage from the fastener base 1; therefore, the width of the interval space 3 is smaller than the protrusion of the hook part 2011.

[0077] However, the gap space 3 cannot be too small. If the gap space 3 is too small, when the front end of the detachable latch 2 is pulled upward, there will not be enough space in front of the grooved insert 201 for the grooved insert 201 to be lifted upward. That is, the front end face and the front groove wall 1011 of the base will interfere due to insufficient gap. This will not only prevent unlocking, but also prevent successful locking (the detachable latch 2 will interfere with the front groove wall 1011 of the base during the process of switching from tilt to horizontal, and ultimately cannot be locked).

[0078] Furthermore, the key to unlocking lies in whether the front end of the recessed insert 201 can be successfully lifted to the slot position of the base recess 101. The feasibility of this lifting action is essentially a geometric problem, involving the following parameters:

[0079] (1) Width dimension (A) of the space 3: It determines how much room for movement the front end of the grooved insert 201 can have when the detachable latch 2 is lifted upward.

[0080] (2) The height dimension of the groove insert 201 (H, the height dimension is parallel to the depth direction of the base groove 101): It determines how much activity space the front end of the groove insert 201 needs to be able to be smoothly lifted to the slot position of the base groove 101 when the detachable latch 2 is lifted upward.

[0081] (3) The protrusion dimension (P) of the hook part 2011: This directly determines whether the hook part 2011 can easily disengage when subjected to forward pulling force (i.e., P must be greater than A).

[0082] (4) The height difference between the rear wall slot 1012a and the hook part 2011 (∆H, the height of the rear wall slot 1012a is greater than the height of the hook part 2011, and the height is parallel to the depth direction of the base groove 101): This determines whether the hook part 2011 has sufficient vertical space to move upward during the unlocking process, and does not reflect off the top edge of the rear wall slot 1012a, causing it to jam.

[0083] Because of the existence of the interval space 3, the unlocking pull force does not necessarily have to be completely vertical and upward, providing an allowable unlocking pull force angle deviation. Furthermore, the larger the width of the interval space 3, the smaller the height of the groove insert 201, the smaller the protrusion of the hook part 2011, and the greater the difference in height between the rear wall groove 1012a and the hook part 2011, the greater the allowable unlocking angle deviation, but correspondingly, the higher the risk of mis-locking.

[0084] In this embodiment, to reduce design complexity, the width of the interval space 3 can be determined first based on the protrusion dimension of the hook portion 2011. For example, the width dimension A of the interval space 3 can be set to be greater than 1 / 4 of the protrusion dimension of the hook portion 2011. Then, the height dimension H of the groove insert 201 is designed to be a smaller value, significantly lower than the maximum height of the groove insert 201 allowed by A. Similarly, ∆H is also directly set to a larger value to avoid vertical interference when the hook portion 2011 is raised. At this point, only the protrusion dimension of the hook portion 2011 and the width dimension of the interval space 3 need to be specified. Of course, in some other embodiments, the width dimension of the interval space 3 can also be set to be greater than 1 / 3 or 1 / 2 of the protrusion dimension of the hook portion 2011, etc. The specific value can be weighed and chosen according to design needs, and this utility model does not limit this. This can achieve good fastening to avoid accidental unlocking and also have a more suitable unlocking pull angle, reducing the difficulty of unlocking.

[0085] Therefore, the rigid buckle 100a3 provided by this utility model achieves reliable fastening and unlocking through a rigid limiting structure, avoiding the use of elastic components, thus solving the problem that existing elastic buckles for pet leashes are prone to failure due to fatigue and aging.

[0086] In this embodiment, the front groove wall 1011 of the base is an inclined surface, and the width from the front groove wall 1011 to the rear groove wall 1012 of the base gradually decreases from top to bottom, thus forming a space 3 that is narrower at the bottom and wider at the top.

[0087] (1) Enhanced reliability of anti-mislocking ("narrower bottom effect"): When the detachable latch 2 is engaged, the recessed insert 201 is located at the bottom of the base recess 101. At this time, due to the presence of the inclined surface, the gap between the lower part of the front end face of the recessed insert 201 and the front groove wall 1011 of the base is in the smallest "narrow area". When subjected to an unexpected pulling force towards the front groove wall 1011 of the base, the recessed insert 201 contacts the inclined surface almost immediately, and the pulling force is directly transmitted as a normal pressure on the groove wall, rather than being converted into a torque that lifts the front end of the recessed insert 201 upward, thereby greatly suppressing the unfavorable rotation with the hook part 2011 as the fulcrum and effectively preventing accidental disengagement.

[0088] (2) Optimized unlocking action ("wider upper effect"): During intentional unlocking, when the front end of the detachable latch 2 is pulled upward, the front end of the recessed insert 201 is lifted upward. As the lifting height increases, the width of the gap space 3 in front of the recessed insert 201 gradually increases due to the inclined surface design (entering the "wide zone"). The recessed insert 201 will not interfere with or get stuck on the front groove wall 1011 of the base during the lifting process. The inclined surface provides increasingly ample space for rotation, making the unlocking action very smooth and effortless. Once the front end of the recessed insert 201 rotates to a sufficient angle, the latch 2011 can smoothly disengage from the rear wall slot 1012a, completing the unlocking.

[0089] In summary, the inclined surface design of the front groove wall 1011 of the base, in conjunction with the interval space 3, creates an intelligent, non-uniform accommodating environment: the "narrow space" at the bottom suppresses unfavorable rotation to ensure safety; and the "wide space" on the unlocking path guides favorable rotation for easy operation.

[0090] In this embodiment, the detachable latch 2 further includes a latch body 203 disposed above the recessed insert 201. The latch body 203 protrudes rearward to form a rear protrusion 2031 for connecting the leash 100a2. When the pet walks in front of the owner, the leash 100a2 applies a rearward pulling force to the rear protrusion 2031. This pulling force generates a torque that, with the hook portion 2011 as the instantaneous fulcrum, drives the upper part of the rear end face of the recessed insert 201 to press tightly against the periphery of the rear wall slot 1012a. This torque effectively resists rotation in the unlocking direction, ensuring absolute stability of the latch when the pet lunges forward.

[0091] The latch body 203 protrudes forward to form a forward protrusion 2032 for connecting the unlocking pull rope 202. This design places the unlocking operation point in the front, providing a clear ergonomic interface, allowing users to directly and effortlessly apply a vertically upward unlocking force to the front end of the detachable latch 2 by pulling the unlocking pull rope 202, making the operation very convenient.

[0092] In this embodiment, the bottom surface of the hook portion 2011 is an inclined surface that slopes upward away from the interval space 3, and the top surface of the hook portion 2011 is an inclined surface that slopes downward away from the interval space 3. These two inclined surfaces together optimize the movement trajectory of the hook portion 2011 within the rear wall slot 1012a. Specifically, the inclined bottom surface of the hook portion 2011 primarily serves a guiding function during the fastening process, guiding the hook portion 2011 to smoothly slide into the rear wall slot 1012a; while the inclined top surface of the hook portion 2011 primarily serves a clearance function during the unlocking process, providing necessary space for the hook portion 2011 to rotate upward and exit the rear wall slot 1012a, avoiding interference with the upper edge of the rear wall slot 1012a. These two opposing inclined surfaces together ensure the smoothness and reliability of the fastening and unlocking actions.

[0093] In this embodiment, the upper part of the front end face of the recessed insert 201 near the front groove wall 1011 of the base is provided with a protruding boss 2012 protruding towards the front groove wall 1011 of the base, so that the gap between the upper part of the front end face and the front groove wall 1011 of the base is smaller than the gap between the lower part of the front end face and the front groove wall 1011 of the base. This creates a two-stage unlocking mechanism, which greatly improves the smoothness of unlocking and user experience without weakening the anti-mislocking capability. The unlocking action sequence is as follows:

[0094] (1) High-angle start-up phase. When the user applies the unlocking pull force, due to the presence of the front protrusion 2012, the initial contact point between the grooved insert 201 and the front groove wall 1011 of the base is located at the upper protrusion. This design ensures that in the initial stage of unlocking, the grooved insert 201 must start to rotate with a nearly vertical upward pure upward pull force with minimal angular deviation. This high-precision angle requirement is a key safety guarantee to avoid accidental disengagement due to oblique pulling force during daily traction.

[0095] (2) Low-resistance completion stage. Once the front protrusion 2012 is slightly lifted under the pulling force and disengages from the front groove wall 1011 of the base, the unlocking process immediately enters the second stage. At this time, the force contact point of the grooved insert 201 instantly changes from "point contact (protrusion)" to "surface contact (the entire lower front surface)", and because the lower gap is much larger than the upper gap, the front end of the grooved insert 201 instantly gains a huge rotation space. This makes the subsequent unlocking action extremely smooth and effortless, and the user only needs a small pulling force to easily complete the entire lifting and separation action.

[0096] Therefore, the 2012 front-protruding boss structure cleverly combines "highly secure activation conditions" with "low-operational-load completion processes." It ensures that the unlocking procedure is only initiated when a pulling force with a very clear direction and intention is applied; and once initiated, unlocking can be easily completed, achieving a high degree of unity between safety and ease of use.

[0097] In summary, the rigid fastener 100a3 provided in this embodiment has the following advantages:

[0098] ① By using a rigid limiting structure in conjunction with the interval space 3, reliable fastening and unlocking of non-elastic components is achieved, solving the problem of traditional plastic buckles failing due to fatigue and aging.

[0099] ② By designing the width of the interval space 3 to be smaller than the protrusion size of the hook part 2011, the unlocking pull force in a specific direction can be successfully unlocked, while the pull force in other directions is restricted, effectively preventing accidental locking.

[0100] ③ By setting a magnetic attraction element between the grooved insert 201 and the fastener base 1, the magnetic attraction force is used to assist in guiding and maintaining the fastening state, thereby improving the smoothness of the fastening process and the reliability of locking.

[0101] ④ By designing the front groove wall 1011 of the base as an inclined surface, a space 3 that is narrow at the bottom and wide at the top is formed. This can suppress unfavorable rotation at the bottom to prevent accidental unlocking, and provide ample space at the top for unlocking and lifting.

[0102] ⑤ By setting a protruding boss 2012 on the upper part of the front end face of the grooved insert 201, a two-stage unlocking mechanism is created, which not only ensures the high-security starting conditions, but also achieves smooth separation with low resistance in the later stage of unlocking.

[0103] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A rigid fastener, characterized in that, include: The fastener base (1) is provided with a base groove (101) with an open structure. The base groove (101) has a base front groove wall (1011) and a base rear groove wall (1012) arranged opposite to each other. The base rear groove wall (1012) is provided with a rear wall slot (1012a). The detachable latch (2) is provided with a groove insert (201) that is inserted into the base groove (101) through the opening of the base groove (101). The groove insert (201) has a hook portion (2011) protruding toward the rear wall slot (1012a) at the lower part of the rear end face of the groove insert (201) near the rear wall slot (1012a). in, When the detachable latch (2) and the buckle base (1) are engaged, the hook part (2011) is accommodated in the rear wall slot (1012a), and there is a gap space (3) between the rear slot wall (1012) of the base and the groove insert (201). The space (3) is used to provide clearance space for the hook (2011) to fully exit the rear wall slot (1012a) to achieve unlocking when the front end of the detachable latch (2) is lifted upward by an unlocking pull parallel to the opening orientation of the base groove (101). Furthermore, the width of the space (3) is smaller than the protrusion of the hook (2011) so as to restrict the hook (2011) from completely exiting the rear wall slot (1012a) when the removable latch (2) is subjected to a pulling force toward the front groove wall (1011) of the base.

2. The rigid fastener according to claim 1, characterized in that, The recessed insert (201) is provided with an insert magnetic member (204) inside, and the bottom of the base recess (101) is provided with a base magnetic member (102) for magnetic connection with the insert magnetic member (204). The base magnetic chuck (102) is located directly below the opening of the base groove (101) and biased towards the side of the rear wall slot (1012a). It is used to apply a magnetic attraction force toward the rear and downward to the insert magnetic chuck (204) during the fastening process, so that the upper part of the groove insert (201) near the rear end face of the rear wall slot (1012a) is close to the upper edge of the rear wall slot (1012a) to maintain the fastening state of the detachable lock (2) and the fastener base (1).

3. The rigid fastener according to claim 2, characterized in that, One of the insert magnetic connector (204) and the base magnetic connector (102) is a first magnet, and the other is an iron block or a second magnet with the opposite polarity to the first magnet.

4. The rigid fastener according to claim 1, characterized in that, The front groove wall (1011) of the base is an inclined surface, and the width dimension from the front groove wall (1011) of the base to the rear groove wall (1012) of the base gradually decreases from top to bottom.

5. The rigid fastener according to claim 1, characterized in that, The detachable latch (2) also includes a latch body (203) located above the groove insert (201), the latch body (203) extending rearward to form a rear protrusion (2031) for connecting the traction rope (100a2).

6. The rigid fastener according to claim 5, characterized in that, The latch body (203) protrudes forward to form a forward protrusion (2032) for connecting the unlocking pull rope (202).

7. The rigid fastener according to claim 1, characterized in that, The height dimension of the rear wall slot (1012a) is greater than the height dimension of the hook portion (2011), and the height dimension is parallel to the depth direction of the base groove (101).

8. The rigid fastener according to claim 1, characterized in that, The bottom surface of the hook part (2011) is an inclined surface that slopes upward away from the interval space (3).

9. The rigid fastener according to claim 1, characterized in that, The top surface of the hook (2011) is an inclined surface that slopes downward toward the space (3) away from the space.

10. The rigid fastener according to claim 1, characterized in that, The groove insert (201) has a front protrusion (2012) protruding towards the front groove wall (1011) of the base on the upper part of the front end face, so that the gap between the upper part of the front end face and the front groove wall (1011) of the base is smaller than the gap between the lower part of the front end face and the front groove wall (1011) of the base.

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