Patent Description:
Embodiments of the present application relate to the technical field of fastening accessories, and in particular, to a belt buckle and a belt.

A belt buckle generally refers to a connecting apparatus in which a pair of male buckle and female buckle connected to each other are mounted at connection belts of a canvas bag or handbag or at end portions of a belt, and is commonly used in the fields such as belts and straps. For the most commonly used belt buckle available in the market, as shown in <FIG>, a male buckle <NUM> thereof is provided with two elastic jaws <NUM>, and a female buckle <NUM> is provided with an insertion slot matching the elastic jaws <NUM>. An inner wall of the insertion slot is provided with clamping holes <NUM> in communication with the outside. When the male buckle <NUM> and the female buckle <NUM> cooperate in use, the jaws only need to be aligned with and inserted into the insertion slot. The elastic jaws <NUM> are pressed by the inner wall of the insertion slot and shrink to the middle. After front ends of the elastic jaws <NUM> move to the clamping holes, the elastic jaws <NUM> are restored from the deformation and are clamped to the clamping holes <NUM> to realize the fastening of the male buckle <NUM> and the female buckle <NUM>. When the fastening state of the male buckle <NUM> and the female buckle <NUM> needs to be released, the front ends of the elastic jaws <NUM> need to be pressed at the same time, so that the front ends of the elastic jaws <NUM> shrink into the insertion slot, and can the male buckle <NUM> be drawn out. However, when one of the elastic jaws <NUM> is broken by an external force, the male buckle <NUM> still cooperates with the female buckle <NUM> and swings in the insertion slot, and the phenomenon of disengagement may even occur, which is more inconvenient to use. A buckle according to the preamble of claim <NUM> is disclosed in <CIT>.

In order to solve the above technical problems, embodiments of the present application embodiment provide a belt buckle and a belt that are easy in use.

The embodiments of the present application adopt the following technical solutions to solve the technical problems thereof:.

A belt buckle, including: a female buckle, including a base and a cover plate, an insertion slot being provided in the base, the cover plate being mounted on the base, the cover plate being provided with a protrusion, the cover plate being rotatable relative to the base, and the female buckle being used to connect to one end of a lace; a male buckle, including an insertion block and a male buckle main body, the male buckle main body being connected to the insertion block, a recess being provided in the end of the insertion block facing towards the cover plate, the male buckle being used to connect to the other end of the lace; wherein when the insertion block is inserted into the insertion slot, and the protrusion extends into the recess, the female buckle and the male buckle are fastened together; and an elastic member arranged on the end of the cover plate away from the male buckle; wherein when the cover plate is pressed, one end of the cover plate moves towards the base, the elastic member presses the base, and the other end of the cover plate lifts in the direction away from the base, so as to cause the protrusion to separate from the recess.

The base includes a bottom plate, a first side plate, a second side plate, and a connecting piece; two sides of the bottom plate are respectively connected to the first side plate and the second side plate to form the insertion slot, two ends of the connecting piece are respectively connected to the first side plate and the second side plate, the connecting piece and the bottom plate are arranged at an interval, and the connecting piece is used for winding the lace.

Optionally, the first side plate and the second side plate are in a round arch shape, and when the cover plate covers the base, the ends of the first side plate and the second side plate away from the male buckle are arranged at a distance from the cover plate, the cover plate is pressed, and the cover plate is movable in a direction close to the bottom plate, so as to press the elastic member.

The base further includes a guard rod, the first side plate and the second side plate extend outward towards one end away from the bottom plate and are connected to both ends of the guard rod, and the guard rod is located on one side of the base away from the male buckle.

Optionally, the first side plate partially extends in a direction towards the second side plate to form a first supporting plate, the second side plate partially extends in a direction towards the first side plate to form a second supporting plate, the first supporting plate and the second supporting plate are arranged symmetrically at an interval, and the first supporting plate and the second supporting plate are both located on one side of the base away from the insertion block.

Optionally, an end face of the cover plate facing the base is partially stretched to form a first guide block and a second guide block, and the first guide block and the second guide block are arranged at an interval so that a channel is formed between the first guide block and the second guide block; and the insertion block extends into the channel so that the protrusion is extendable into the recess.

Optionally, the cover plate is further provided with a supporting block, the supporting block is accommodated in the channel, and two ends of the supporting block are connected to the first guide block and the second guide block, respectively.

Optionally, the insertion block is provided with an inclined surface, one end of the insertion block is partially recessed to form the recess, and the first guide block and the second guide block are both higher than the protrusion; and when the insertion block is inserted towards the channel, the protrusion moves along the inclined surface, one end of the cover plate moves towards the bottom plate and compresses the elastic member, and after the protrusion extends into the recess, the elastic member is restored from the deformation.

Optionally, side walls of the first guide block and the second guide block are respectively provided with a first position-limiting block and a second position-limiting block, and the first side plate and the second side plate are respectively provided with a first position-limiting slot and a second position-limiting slot. When the cover plate covers the base, the first position-limiting block extends into the first position-limiting slot, the second position-limiting block extends into the second position-limiting slot, one end of the cover plate is pressed, and the first position-limiting block and the second position-limiting block rotate in the first position-limiting slot and the second position-limiting slot, respectively, so that the other end of the cover plate lifts in the direction away from the base.

Optionally, the male buckle main body includes an opening frame, and the opening frame includes a main frame block, a first sub-frame block, and a second sub-frame block. Two ends of the main frame block are respectively connected to ends of the first sub-frame block and the second sub-frame block, respectively. The other ends of the first sub-frame block and the second sub-frame block respectively extend towards a middle closing direction to form a first extension block and a second extension block. Two side surfaces of the insertion block are respectively connected to the first extension block and the second extension block. When the insertion block is inserted into the insertion slot, end portions of the first sub-frame block and the second sub-frame block both abut against the base.

Optionally, the male buckle main body further includes a connecting rod, and the first sub-frame block and the second sub-frame block extend in a direction away from the base to form a first abutting block and a second abutting block. Two ends of the connecting rod are respectively connected to the first abutting block and the second abutting block.

Optionally, one surface of the insertion block facing the base is a bottom surface of the insertion block, end faces of the first sub-frame block and the second sub-frame block away from the bottom surface of the insertion block are higher than the bottom surface of the insertion block, and one end of the base close to the male buckle extends outward to form a guide piece. When the insertion block is inserted into the female buckle, one end face of the guide piece and the bottom surface of the insertion block slide relative to each other, and the guide piece is embedded between the first extension block and the second extension block.

Optionally, ends of the first side plate and the second side plate facing the male buckle extend outward, respectively forming a first extension portion and a second extension portion, and when the female buckle and the male buckle are fastened together, the first extension portion and the second extension portion respectively abut against the first sub-frame block and the second sub-frame block.

A belt includes the above belt buckle and a lace, one end of the lace is connected to the female buckle, and the other end of the lace is connected to the male buckle.

The beneficial effects of the embodiments of the present application are: the belt buckle provided by the embodiments of the present application includes: a female buckle, including a base and a cover plate, an insertion slot being provided in the base, the cover plate being mounted on the base, the cover plate being provided with a protrusion, the cover plate being rotatable relative to the base, and the female buckle being used to connect to one end of a lace; a male buckle, including an insertion block and a male buckle main body, the male buckle main body being connected to the insertion block, a recess being provided in the end of the insertion block facing towards the cover plate, the male buckle being used to connect to the other end of the lace; wherein when the insertion block is inserted into the insertion slot, and the protrusion extends into the recess, the female buckle and the male buckle are fastened together; and an elastic member arranged on the end of the cover plate away from the male buckle. Therefore, when the cover plate is pressed, one end of the cover plate moves towards the base, the elastic member presses the base, and the other end of the cover plate lifts in the direction away from the base, so as to cause the protrusion to separate from the recess, which is more convenient in use.

One or more embodiments are exemplified by pictures in corresponding accompanying drawings, these exemplifications do not constitute limitations of the embodiments, and elements with identical reference numerals in the accompanying drawings are denoted as similar elements. Unless otherwise stated, figures in the accompanying drawings do not constitute a scale limitation.

In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as being "fixed to" another element, it may be directly on the other element, or one or more intervening elements may exist therebetween. When an element is expressed as being "connected" to another element, it may be directly connected to the other element, or one or more intervening elements may exist therebetween. Orientation or position relationships indicated by terms such as "up," "down," "inside," "outside," "vertical," and "horizontal" used in this specification are based on the orientation or position relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field belonging to this application. The terms used in the specification of the present application are only for the purpose of describing specific embodiments, and are not used for limiting the present application. As used in this specification, the term "and/or" includes any and all combinations of one or more of associated listed items.

In addition, the technical features involved in the different embodiments of the present application described below may be combined with each other as long as there is no conflict with each other.

As shown in <FIG>, a belt buckle <NUM> provided by one of the embodiments of the present application includes a female buckle <NUM> and a male buckle <NUM>. The female buckle <NUM> may be fastened to the male buckle <NUM>, and the female buckle <NUM> is used to connect to one end of a lace. The male buckle <NUM> is used to connect to the other end of the lace.

The female buckle <NUM> includes a base <NUM>, a cover plate <NUM>, and an elastic member <NUM>. The base <NUM> is mounted to fit the cover plate <NUM>, and the elastic member <NUM> is arranged on one side of the cover plate <NUM> facing towards the base <NUM>, wherein the cover plate <NUM> can swing relative to the base <NUM>. One end of the cover plate <NUM> is pressed so that the elastic member <NUM> and the base <NUM> press each other, and the other end of the cover plate <NUM> swings in a direction away from the base <NUM>.

According to <FIG>, the base <NUM> includes a bottom plate <NUM>, a first side plate <NUM>, a second side plate <NUM>, and a connecting piece <NUM>. Both sides of the bottom plate <NUM> are connected to the first side plate <NUM> and the second side plate <NUM> respectively to form the insertion slot <NUM>. Two ends of the connecting piece <NUM> are respectively connected to the first side plate <NUM> and the second side plate <NUM>, end portions of the connecting piece <NUM> and the bottom plate <NUM> are arranged at an interval, and the connecting piece <NUM> is used for winding the lace.

In some embodiments, the first side plate <NUM> and the second side plate <NUM> are in a round arch shape, and when the cover plate <NUM> covers the base <NUM>, the ends of the first side plate <NUM> and the second side plate <NUM> away from the male buckle <NUM> are arranged at a distance from the cover plate <NUM>, the cover plate <NUM> is pressed, and the cover plate <NUM> is movable in a direction close to the bottom plate <NUM>, so as to press the elastic member <NUM>.

In some embodiments, the side walls of the first side plate <NUM> and the second side plate <NUM> are respectively provided with a first position-limiting slot <NUM> and a second position-limiting slot <NUM>, and the first position-limiting slot <NUM> and the second position-limiting slot <NUM> are symmetrically arranged. It is understandable that the first position-limiting slot <NUM> and the second position-limiting slot <NUM> may be in a circular shape or an arch shape, and of course, may also be in other shapes. Preferably, the first position-limiting slot <NUM> and the second position-limiting slot <NUM> are in an arch shape.

In some embodiments, ends of the first side plate <NUM> and the second side plate <NUM> close to the male buckle <NUM> extend outward to form a first extension portion <NUM> and a second extension portion <NUM>, respectively.

In some embodiments, one end of the bottom plate <NUM> close to the male buckle <NUM> extends outward and forms a guide piece <NUM>.

In some embodiments, in order to enhance the strength of the female buckle <NUM>, the first side plate <NUM> partially extends in a direction towards the second side plate <NUM> to form a first supporting plate <NUM>, and the second side plate <NUM> partially extends in a direction towards the first side plate <NUM> to form a second supporting plate <NUM>, the first supporting plate <NUM> and the second supporting plate <NUM> are arranged symmetrically at an interval, and the first supporting plate <NUM> and the second supporting plate <NUM> are both located on one side of the base <NUM> away from the male buckle <NUM>. It is understandable that when the cover plate <NUM> is subjected to an external force, it swings towards the bottom plate <NUM> and presses the elastic member <NUM>. After the cover plate <NUM> swings by a certain angle, the cover plate <NUM> abuts against the first supporting plate <NUM> and the second supporting plate <NUM>, so as to prevent the cover plate <NUM> from breaking the elastic member <NUM> after subjected to the force.

According to the invention, the base <NUM> further includes a guard rod <NUM>, the first side plate <NUM> and the second side plate <NUM> extend outward towards one end away from the bottom plate <NUM> and are connected to both ends of the guard rod <NUM>, and the guard rod <NUM> is located on one side of the base <NUM> away from the male buckle <NUM>.

Referring to <FIG>, one end face of the cover plate <NUM> is partially stretched outward to form a protrusion <NUM>, a first guide block <NUM>, and a second guide block <NUM>. The first guide block <NUM> and the second guide block <NUM> are arranged at an interval so that a channel is formed between the first guide block <NUM> and the second guide block <NUM>. The protrusion <NUM> is located between the first guide block <NUM> and the second guide block <NUM>. Preferably, one side of the protrusion <NUM> transitions from the end portion of the cover plate <NUM> to the side where the elastic member <NUM> is located, so as to form an arc surface <NUM>.

In some embodiments, both the first guide block <NUM> and the second guide block <NUM> are higher than the protrusion <NUM>. Of course, the first guide block <NUM> and the second guide block <NUM> may also be as high as the protrusion <NUM>. In this embodiment, both the first guide block <NUM> and the second guide block <NUM> are higher than the protrusion <NUM>.

Further, the cover plate <NUM> is further provided with a supporting block <NUM>, the supporting block <NUM> is accommodated in the channel, two ends of the supporting block are respectively connected to the first guide block <NUM> and the second guide block <NUM>, and the supporting block <NUM> is located between the protrusion <NUM> and the elastic member <NUM>.

Further, the cover plate <NUM> is further provided with a plurality of ribbed plates <NUM>, one side of the ribbed plate <NUM> is connected to one side of the supporting block <NUM>, and the other side of the ribbed plate <NUM> is connected to an end face of the cover plate <NUM>.

In some embodiments, one side of the first guide block <NUM> away from the second guide block <NUM> is provided with a first position-limiting block <NUM>, one side of the second guide block <NUM> away from the first guide block <NUM> is provided with a second position-limiting block <NUM>, and the first position-limiting block <NUM> and the second position-limiting block <NUM> are symmetrically arranged.

The elastic member <NUM> is arranged at one end of the cover plate <NUM> and is located at one end of the first guide block <NUM> or the second guide block <NUM> away from the protrusion <NUM>. In this embodiment, the elastic member <NUM> is an elastic sheet bent in a direction away from the protrusion <NUM>, one end of the elastic sheet is connected to the cover plate <NUM>, and the other end is used for abutting against the base <NUM>. In other embodiments, the elastic member <NUM> may also be a spring, one end of the spring is fixedly connected to the cover plate <NUM>, and the other end of the spring is used for abutting against the base. Of course, the elastic member may also be another structure, as long as when the cover plate <NUM> is pressed, one end of the cover plate <NUM> may press the elastic member <NUM> and the other end of the cover plate <NUM> is lifted.

When the base <NUM> is mounted to fit the cover plate <NUM>, the first position-limiting block <NUM> and the second position-limiting block <NUM> extend into the first position-limiting slot <NUM> and the second position-limiting slot <NUM>, respectively. The first position-limiting block <NUM> and the second position-limiting block <NUM> rotate synchronously in the first position-limiting slot <NUM> and the second position-limiting slot <NUM> respectively, so that the two ends of the cover plate <NUM> swing relative to the base <NUM>. The other end of the elastic member <NUM> abuts against the bottom plate <NUM>. When the cover plate <NUM> is pressed to close to one side of the elastic member, the elastic member <NUM> presses the bottom plate <NUM>, and the side of the cover plate <NUM> away from the elasticity lifts in a direction away from the bottom plate <NUM>, so that the position of the protrusion <NUM> changes accordingly.

Referring to <FIG>, in some embodiments, the male buckle <NUM> includes an insertion block <NUM> and a male buckle main body <NUM>. The male buckle main body <NUM> is connected to the insertion block <NUM>. One end of the insertion block <NUM> is recessed inward to form a recess <NUM>, and the insertion block <NUM> is provided with an inclined surface <NUM>. Specifically, when the male buckle <NUM> is fitted with the female buckle <NUM>, the insertion block <NUM> is inserted into the insertion slot <NUM>, and the protrusion <NUM> extends into the recess <NUM>, so that the female buckle <NUM> and the male buckle <NUM> are fastened together.

In some embodiments, the male buckle main body <NUM> includes an opening frame <NUM>, and the opening frame <NUM> includes a main frame block <NUM>, a first sub-frame block <NUM>, and a second sub-frame block <NUM>. Two ends of the main frame block <NUM> are respectively connected to ends of the first sub-frame block <NUM> and the second sub-frame block <NUM>, respectively. The other ends of the first sub-frame block <NUM> and the second sub-frame block <NUM> respectively extend towards a middle closing direction to form a first extension block <NUM> and a second extension block <NUM>. Two side surfaces of the insertion block <NUM> are respectively connected to the first extension block <NUM> and the second extension block <NUM>.

Further, the male buckle main body <NUM> further includes a connecting rod <NUM>, and the first sub-frame block <NUM> and the second sub-frame block <NUM> extend to one end to form a first abutting block <NUM> and a second abutting block <NUM>. Two ends of the connecting rod <NUM> are respectively connected to the first abutting block <NUM> and the second abutting block <NUM>.

Specifically, during use, when the insertion block <NUM> is inserted into the female buckle <NUM> towards the channel, the protrusion <NUM> abuts against the inclined surface <NUM> and moves along the inclined surface <NUM>. The protrusion <NUM> is gradually lifted by the insertion block <NUM>. Limited by the first position-limiting slot <NUM> and the second position-limiting slot <NUM>, the first position-limiting block <NUM> and the second position-limiting block <NUM> rotate in the slot. The side of the cover plate <NUM> close to the elastic member <NUM> downward-presses the elastic member <NUM> towards the bottom plate <NUM>. After the protrusion <NUM> extends into the recess <NUM>, the elastic member is restored from the deformation. The side of the cover plate <NUM> close to the male buckle <NUM> moves in the direction towards the base <NUM>, and the cover plate <NUM> returns to its original position, thereby realizing fastening together of the male buckle <NUM> and the female buckle <NUM>.

It is understandable that, in order to facilitate the docking of the female buckle <NUM> and the male buckle <NUM>, when the insertion block <NUM> extends into the insertion slot <NUM>, the guide piece <NUM> slides tightly close to a bottom surface of the insertion block <NUM> away from the inclined surface <NUM>. When the first extension block <NUM> and the second extension block <NUM> respectively abut against end portions of the first side plate <NUM> and the second side plate <NUM>, the protrusion <NUM> is exactly embedded in the recess <NUM>. At this moment, the two ends of the guide piece <NUM> respectively abut against the first extension block <NUM> and the second extension block <NUM>. The first abutting block <NUM> abuts against the first extension portion <NUM> and the end portion of the cover plate <NUM>, and the second abutting block <NUM> abuts against the second extension portion <NUM> and the end portion of the cover plate <NUM>. The above structure guarantees the tight fit between the female buckle <NUM> and the male buckle <NUM>.

On the other hand, when the cover plate <NUM> is pressed to close to one side of the elastic member <NUM>, the elastic member <NUM> and the base <NUM> press each other, and the other side of the cover plate <NUM> will be lifted in the direction away from the bottom plate <NUM>. After the elastic member <NUM> is pressed to a certain degree, the protrusion <NUM> is released from the recess <NUM>, and at this moment, the male buckle <NUM> is pulled in the direction away from the female buckle <NUM>, and the fastening relationship of the male buckle <NUM> and the female buckle <NUM> is released.

Through the structure, the male buckle <NUM> only needs to use the insertion block <NUM> inserted into the insertion slot in the female buckle <NUM>, and the fitted mounting of the female buckle <NUM> and the male buckle <NUM> can be quickly realized. When it is necessary to release the fastening relationship between the female buckle <NUM> and the male buckle <NUM>, the separation of the two may be achieved by pressing the cover plate <NUM> and drawing and pulling the male buckle <NUM>. Therefore, the docking and separation of the female buckle <NUM> and the male buckle <NUM> are convenient and fast.

The belt buckle <NUM> provided by the embodiments of the present application includes: a female buckle <NUM>, including a base <NUM> and a cover plate <NUM>, an insertion slot <NUM> being provided in the base <NUM>, the cover plate <NUM> being mounted on the base <NUM>, the cover plate <NUM> being provided with a protrusion <NUM>, the cover plate <NUM> being rotatable relative to the base <NUM>, and the female buckle <NUM> being used to connect to one end of a lace; a male buckle <NUM>, including an insertion block <NUM> and a male buckle main body <NUM>, the male buckle main body <NUM> being connected to the insertion block <NUM>, a recess <NUM> being provided in the end of the insertion block <NUM> facing towards the cover plate <NUM>, the male buckle <NUM> being used to connect to the other end of the lace, wherein when the insertion block <NUM> is inserted into the insertion slot <NUM>, and the protrusion <NUM> extends into the recess <NUM>, the female buckle <NUM> and the male buckle <NUM> are fastened together; and an elastic member <NUM> arranged on the end of the cover plate <NUM> away from the male buckle <NUM>. Therefore, when the cover plate <NUM> is pressed, one end of the cover plate <NUM> moves towards the base <NUM>, the elastic member <NUM> presses the base <NUM>, and the other end of the cover plate <NUM> lifts in the direction away from the base <NUM>, so as to cause the protrusion <NUM> to separate from the recess <NUM>, which is more convenient in use. Meanwhile, after a front end portion of the insertion block <NUM> is broken, as long as the recess <NUM> still exists, the female buckle <NUM> and the male buckle <NUM> can still fit each other.

As shown in <FIG>, a belt (not shown) provided by another embodiment of the present application includes the belt buckle <NUM> of the above embodiment and a lace (not shown), one end of the lace is connected to the female buckle, and the other end of the lace is connected to the male buckle.

It is understandable that one end of the lace may be tied to the connecting piece <NUM> of the female buckle <NUM>, and of course may also be tied to other positions of the female buckle <NUM>. In this embodiment, the lace is tied to the connecting piece <NUM>. Similarly, the other end of the lace may be tied to the connecting rod <NUM> or other positions of the male buckle <NUM>, such as the main frame block <NUM>. Preferably, the other end of the lace is tied to the connecting rod <NUM>.

Claim 1:
A belt buckle (<NUM>), comprising:
a female buckle (<NUM>), comprising a base (<NUM>) and a cover plate (<NUM>), an insertion slot (<NUM>) being provided in the base (<NUM>), the cover plate (<NUM>) being mounted on the base (<NUM>), the cover plate (<NUM>) being provided with a protrusion (<NUM>), the cover plate (<NUM>) being rotatable relative to the base (<NUM>), and the female buckle (<NUM>) being used to connect to one end of a lace;
a male buckle (<NUM>), comprising an insertion block (<NUM>) and a male buckle main body (<NUM>), the male buckle main body (<NUM>) being connected to the insertion block (<NUM>), a recess (<NUM>) being provided in the end of the insertion block facing towards the cover plate, the male buckle (<NUM>) being used to connect to the other end of the lace; wherein when the insertion block (<NUM>) is inserted into the insertion slot (<NUM>), and the protrusion (<NUM>) extends into the recess (<NUM>), the female buckle (<NUM>) and the male buckle (<NUM>) are fastened together; and
an elastic member (<NUM>) arranged on the end of the cover plate (<NUM>) away from the male buckle (<NUM>);
wherein when the cover plate (<NUM>) is pressed, one end of the cover plate (<NUM>) moves towards the base (<NUM>), the elastic member (<NUM>) presses the base (<NUM>), and the other end of the cover plate (<NUM>) lifts in the direction away from the base (<NUM>), so as to cause the protrusion to separate from the recess (<NUM>);
wherein the base (<NUM>) comprises a bottom plate (<NUM>), a first side plate (<NUM>), a second side plate (<NUM>), and a connecting piece (<NUM>);
two sides of the bottom plate (<NUM>) are respectively connected to the first side plate (<NUM>) and the second side plate (<NUM>) to form the insertion slot (<NUM>), two ends of the connecting piece (<NUM>) are respectively connected to the first side plate (<NUM>) and the second side plate (<NUM>), the connecting piece (<NUM>) and the bottom plate (<NUM>) are arranged at an interval, and the connecting piece (<NUM>) is used for winding the lace;
characterized in that the base (<NUM>) further comprises a guard rod (<NUM>), the first side plate (<NUM>) and the second side plate (<NUM>) extend outward towards one end away from the bottom plate (<NUM>) and are connected to both ends of the guard rod (<NUM>), and the guard rod (<NUM>) is located on one side of the base (<NUM>) away from the male buckle (<NUM>).