CN209498785U - Magnetic chest button - Google Patents

Abstract

The utility model discloses a magnetism chest is detained, it includes pin thread, box, first magnetic structure, second magnetic structure and bullet arm. One of the male and female buckles has a mating plug, and the other of the male and female buckles has a mating cavity matching the mating plug. The elastic arm comprises a fixed end fixed on the counter plug and a movable end which is selectively elastically deformed relative to the fixed end and is arranged in a suspended manner, the movable end is provided with a clamping part, a male buckle or a female buckle with a plug cavity is provided with a matching and clamping part used for being clamped with the clamping part, and the movable end always has the tendency of enabling the clamping part to be clamped with the matching and clamping part. The first magnetic structure is arranged on the male buckle, and the second magnetic structure is arranged on the female buckle; in the process of mutually buckling the male buckle and the female buckle, the plug is inserted into the opposite insertion cavity, so that the clamping part is clamped with the matching and clamping part under the elastic action of the movable end, and the first magnetic structure and the second magnetic structure are mutually magnetically attracted or magnetically repelled. Therefore, the magnetic chest buckle of the utility model is convenient to lock or unlock and has compact structure.

Description

Magnetic chest buckle

technical field

The utility model relates to the field of daily buckles, in particular to a magnetic chest buckle.

Background technique

With the continuous development of the economy and the continuous progress of science and technology, extremely rich material consumer goods are provided for people's lives, and infant vehicles are one of many material consumer goods.

As we all know, in infant carriers, the use of braided belts is inseparable, for example, through the combined use of braided straps, infants can be stabilized on infant carriers to achieve the purpose of ensuring the personal safety of infants; in order to make different The braided straps can be assembled and disassembled at any time to meet the needs of infants and young children on the infant carrier, so the use of buckles is inseparable.

Among them, for the breast buckle in the existing buckle, it includes a male buckle, a female buckle for selectively engaging or disengaging the male buckle, and a button for operating the male buckle and the female buckle to release the buckle ;When the male buckle and the female buckle are fastened and fixed, different braided belts are assembled together at this time; Separation between different braids.

However, the traditional chest buckle has the defects of cumbersome operation and complex structure.

Therefore, there is an urgent need for a convenient and compact magnetic chest buckle to overcome the above-mentioned defects.

Utility model content

The purpose of the utility model is to provide a magnetic breast clasp with convenient operation and compact structure.

To achieve the above purpose, the magnetic chest buckle of the present invention includes a male buckle, a female buckle, a first magnetic structure, a second magnetic structure and an elastic arm. One of the male buckle and the female buckle has a pair of plugs, and the other of the male buckle and the female buckle has a mating cavity for matching the pair of plugs. The elastic arm includes a fixed end fixed on the pair of plugs and a movable end that is selectively elastically deformed relative to the fixed end and arranged in the air. The movable end is provided with a locking part, and the male buckle or the female buckle with the mating cavity is provided with a function. For the matching part that engages with the engaging part, the movable end always has a tendency to keep the engaging part engaged with the matching part. The first magnetic structure is set on the male buckle, and the second magnetic structure is set on the female buckle ; During the interlocking process of the male buckle and the female buckle, the plug is inserted into the mating cavity so that the engaging part is engaged with the matching part under the elastic action of the movable end, and the first magnetic structure and the second magnetic structure are mutually magnetic attract or repel magnetically.

Preferably, the movable end is elastically deformed in a direction intersecting with the direction in which the plug is inserted into the mating chamber during the process of inserting the mating plug into the mating chamber, thereby allowing the engaging portion to slide to a position engaged with the mating portion.

Preferably, when the mating plug is inserted into the mating cavity, the engaging portion is pushed by the wall of the mating cavity to drive the movable end to elastically deform away from the wall of the mating cavity.

Preferably, the engaging portion has an inclined guide surface, and the inclined guide surface is inclined outward along the direction in which the plug is pulled out of the mating cavity.

Preferably, the mouth of the mating cavity has an inclined matching guide surface matching the inclined guiding surface.

Preferably, the engaging part is formed on the cavity wall of the mating cavity.

Preferably, the engaging part is a hook structure, and the engaging part is a slot structure communicating with the mating cavity.

Preferably, the engaging part is a slotted hole structure, and the engaging part is a protruding structure formed on the upper cavity wall of the mating cavity and protruding downward.

Preferably, the length direction of the elastic arm is the same as the length direction or width direction of the male buckle or the female buckle with the plug.

Preferably, the mating plug is inserted into the mating cavity along the length direction or the width direction of the male buckle or the female buckle of the mating plug.

Preferably, after the mating plug is inserted into the mating cavity, the male buckle and the female buckle are mutually butted and extended in the length direction or the width direction.

Preferably, at least a part of the movable end is exposed after the mating plug is inserted into the mating cavity.

Preferably, the movable end includes a trigger section and a middle section connected between the trigger section and the fixed end, the engaging part is located at the middle section, and the trigger section is exposed after the plug is inserted into the mating cavity.

Preferably, the trigger section protrudes outward relative to the middle section and forms a step with the middle section, the engaging part is located in front of the step along the direction in which the mating plug is inserted into the mating cavity, and the step has a Resist and limit the male buckle or female buckle of the socket.

Preferably, the first magnetic structure is opposite to the second magnetic structure along the direction in which the mating plug is inserted into the mating cavity.

Preferably, the first magnetic structure or the second magnetic structure is located at the pair of plugs.

Preferably, the first magnetic structure or the second magnetic structure is built in the mating plug, and the first magnetic structure or the second magnetic structure is also adjacent to the end surface of the mating plug facing the mating cavity.

Preferably, the plug is provided with a movable space for elastic deformation of the movable end, and the movable space runs through the side of the plug facing away from the engaging portion.

Preferably, the magnetic chest buckle of the present utility model also includes a limit cover, which is combined with the plug cover to cover the movable space, and the limit cover limits the range of elastic deformation of the movable end.

Preferably, the male buckle and the female buckle are provided with piercing holes for braiding.

Preferably, the piercing holes on the male buckle are arranged along the length direction of the male buckle and are located at the side wall of the male buckle in the length direction, and the piercing holes on the female buckle are arranged along the length direction of the female buckle and are located on the side wall of the female buckle. at the side walls in the length direction.

Compared with the prior art, since the elastic arm has a movable end which is fixed on the fixed end of the plug and elastically deforms relative to the fixed end, the movable end is provided with an engaging part, and the male buckle or the female buckle with the insertion cavity is useful. The engaging part is engaged with the engaging part, and the movable end keeps the engaging part in a tendency to engage with the engaging part. Therefore, during the process of inserting the plug into the mating cavity, the engaging part is in the position of the movable end. Under the action of elasticity, it can quickly engage with the matching part, so that the fastening operation between the male buckle and the female buckle is more convenient; and because the first magnetic structure is set on the male buckle, the second magnetic structure is set on the female buckle Therefore, during the process of inserting the plug into the mating cavity, the first magnetic structure and the second magnetic structure magnetically attract or repel each other, so that the mating or pulling operation between the male buckle and the female buckle is very convenient. And when the first magnetic structure and the second magnetic structure are magnetically attracted to each other, the fastening between the male buckle and the female buckle after the mating is made more stable, further increasing the reliability of the fastening between the male buckle and the female buckle . In addition, the combination of the first magnetic structure, the second magnetic structure and the elastic arm can realize the convenience of the plug-in operation between the male buckle and the female buckle, so the structure of the magnetic chest buckle of the present invention is more compact.

Description of drawings

Fig. 1 is a three-dimensional structure diagram of the magnetic chest buckle of the present invention when the male buckle and the female buckle are engaged with each other and viewed from the front.

Fig. 2 is a three-dimensional schematic view of the magnetic chest buckle of the present invention when the male buckle and the female buckle are engaged with each other and viewed from the back.

Fig. 3 is a three-dimensional schematic diagram of the disassembled magnetic chest buckle shown in Fig. 1 .

Fig. 4 is a three-dimensional schematic diagram of the disassembled magnetic chest buckle shown in Fig. 2 .

Fig. 5 is a three-dimensional structure diagram of the magnetic chest buckle of the present invention when the male buckle and the female buckle are not fastened and viewed from the front.

Fig. 6 is a three-dimensional structure diagram of the magnetic chest buckle of the present invention when the male buckle and the female buckle are not fastened and viewed from the back.

Fig. 7 is a schematic diagram of the internal structure of the magnetic chest buckle of the present invention after the male buckle and the female buckle are fastened and cut along the longitudinal direction.

FIG. 8 is a partially enlarged view at D in FIG. 7 .

Detailed ways

In order to describe the technical content and structural features of the present utility model in detail, further description will be made below in conjunction with the embodiments and accompanying drawings.

Please refer to FIG. 1 to FIG. 4 , the magnetic chest buckle 100 of the present invention includes a male buckle 1 , a female buckle 2 , a first magnetic structure 3 , a second magnetic structure 4 and an elastic arm 5 . The male buckle 1 has a pair of plugs 11, and the female buckle 2 has a mating cavity 21 that matches the pair of plugs 11, so as to facilitate the interlocking operation between the male buckle 1 and the female buckle 2. Of course, according to actual needs, the mating cavity 21 can be formed by What the male buckle 1 has, correspondingly, the plug 11 is what the female buckle 2 has, so it is not limited thereto. The elastic arm 5 includes a fixed end 51 fixed on the mating plug 11 and a movable end 52 that is selectively elastically deformed relative to the fixed end 51 and is suspended in the air. There is a matching portion 211 for engaging with the engaging portion 521 , and the movable end 52 always has a tendency to keep the engaging portion 521 engaged with the engaging portion 211 . The first magnetic structure 3 is set on the male buckle 1, and the second magnetic structure 4 is set on the female buckle 2. Preferably, both the first magnetic structure 3 and the second magnetic structure 4 are magnets, but not limited thereto. . Wherein, during the interlocking process of the male buckle 1 and the female buckle 2, the mating plug 11 is inserted into the mating cavity 21 so that the engaging portion 521 engages with the mating portion 211 under the elastic action of the movable end 52, and the first The magnetic structure 3 and the second magnetic structure 4 are magnetically attracted to each other, so that the fastening of the magnetic chest buckle 100 of the present invention is more convenient and more stable. It can be understood that, according to the needs of actual situations, when the unlocking of the magnetic chest buckle 100 of the present invention is required to be more convenient, the first magnetic structure 3 and the second magnetic structure 4 are magnetically repelled from each other, so it is not limited thereto; When the male buckle 1 has the mating cavity 21 and the female buckle 2 has the mating plug 11 , the matching portion 211 is provided on the male buckle 1 , so it is not limited thereto. More specifically, as follows:

Please refer to Fig. 3, Fig. 5, Fig. 7 and Fig. 8, during the process of inserting the mating plug 11 into the mating cavity 21, the movable end 52 is elastically deformed in a direction staggered with the mating plug 11 inserted into the mating cavity 21, thereby allowing snap-in The part 521 slides to the position engaged with the card matching part 211; preferably, in this embodiment, the movable end 52 is formed along the height direction of the male buckle 1 during the process of inserting the plug 11 into the mating cavity 21 Elastic deformation, so that the movable end 52 can more reliably drive the engagement or disengagement of the engagement portion 521 and the engagement portion 211 during the elastic deformation process, but the invention is not limited thereto. Specifically, when the mating plug 11 is inserted into the mating chamber 21, the engaging portion 521 is pushed by the chamber wall 212 of the mating chamber 21 to drive the movable end 52 to elastically deform away from the chamber wall 211 of the mating chamber 21. At the same time, And because the movable end 52 always has a tendency to engage the engaging portion 521 with the engaging portion 211, so when the engaging portion 521 slides to the position of the engaging portion 211, the movable end 52 elastically recovers to make the engaging portion 521 and the matching part 211 engage with each other, so that the fastening between the male buckle 1 and the female buckle 2 is more convenient and quick. When the male buckle 1 and the female buckle 2 need to be released, press the movable end 52 of the spring arm 5 to make the movable end 52 elastically deform in a direction away from the mating cavity 21, thereby driving the engaging part 521 on the movable end 52 to disengage Engagement with the matching part 211 allows the mating plug 11 to be pulled out from the mating cavity 21 , so as to achieve the purpose of releasing the lock between the male buckle 1 and the female buckle 2 .

Please refer to Fig. 1, Fig. 3, Fig. 5, Fig. 7 and Fig. 8, the card matching part 211 is formed on the cavity wall 212 of the mating cavity 21, preferably, the card matching part 211 is formed on the mating cavity 21 At the cavity wall, correspondingly, the fixed end 51 is fixed on the upper surface of the mating plug 11, so that the arrangement of the matching part 211 on the female buckle 2 and the arrangement of the engaging part 521 on the male buckle 1 are more reasonable and compact, but not This is the limit. Specifically, the engaging part 521 is a hook structure, and the matching part 211 is a slot structure communicating with the mating cavity 21, and the engaging part 521 and the matching part are engaged by the hook structure and the slot structure. The engagement between the locking parts 211 is more reliable, but not limited thereto. For example, the engaging portion 521 has an inclined guiding surface 521a, and the inclined guiding surface 521a is inclined outward along the direction in which the mating plug 11 is pulled out of the mating cavity 21. By virtue of the inclined guiding surface 521a, the engaging portion 521 During the process of inserting the mating plug 11 into the mating chamber 21, it is more easily pushed inward by the end of the chamber wall 212 of the mating chamber 21, and enters into the mating chamber 21 by the elastic deformation of the movable end 52, thereby reducing the The resistance to inserting the plug 11 into the mating cavity 21 makes the mating process smoother, but it is not limited thereto; preferably, the mouth 213 of the mating cavity 21 has an inclined guide that matches the inclined guide surface 521a Surface 213a, through the cooperation of inclined matching guide surface 213a and inclined guiding surface 521a, makes it easier for plug 11 to be inserted into mating cavity 21, thereby making the fastening between male buckle 1 and female buckle 2 more smooth and More convenient and time-saving. It can be understood that, according to needs, the engaging part 521 is a slot structure, and the matching part 211 is a protruding structure formed on the upper cavity wall of the mating cavity 21 and protruding downwards. The structures are engaged with each other, so that the engaging portion 521 and the engaging portion 211 are engaged with each other. In another embodiment, the engaging part 211 may be formed on the side cavity wall of the mating cavity 21 , and correspondingly, the fixed end 51 is fixed on the side surface of the mating plug 11 , but not limited thereto.

Please refer to Fig. 3 and Fig. 5, the length direction of elastic arm 5 is the same as the length direction of male buckle 1, of course, according to actual needs, the length direction of elastic arm 5 can be made the same as the width direction of male buckle 1, so it is not necessary to It can be understood that when the female snap 2 has a pair of plugs, the length direction of the elastic arm 5 at this time is the same as the length direction or width direction of the female snap 1, so it is not limited thereto. Specifically, the elastic arm 5 is a sheet structure, and the elastic arm 5 of the sheet structure is combined with the length direction of the elastic arm 5 to be consistent with the length direction of the male buckle 1, so that the structure of the male buckle 1 is more compact; The arm 5 is not easily damaged during the process of plugging the plug 11 into the plug cavity 21 .

Simultaneously, the mating plug 11 is inserted into the mating chamber 21 along the length direction of the male buckle 1, of course, according to actual needs, the mating plug 11 can also be inserted into the mating chamber 21 along the width direction of the male buckle 1, so it is not limited thereto; It is understood that when the female snap 2 has the mating plug 11, correspondingly, the mating plug 11 is inserted into the mating cavity 21 along the length direction or the width direction of the female snap 2, so it is not limited thereto. Specifically, after the mating plug 11 is inserted into the mating cavity 21, the male buckle 1 and the female buckle 2 extend in the length direction. Of course, in other embodiments, the mating plug 11 is inserted into the mating plug 1 along the width direction Behind the cavity 21, the male buckle 1 and the female buckle 2 are butted and extended in the width direction, so it is not limited thereto.

Please refer to FIG. 1 , FIG. 7 and FIG. 8 , at least a part of the movable end 52 is exposed after the mating plug 11 is inserted into the mating cavity 21 , and the exposed part is convenient for manual operation by the user. Specifically, the movable end 52 includes a trigger section 52a and an intermediate section 52b connected between the trigger section 52 and the fixed end 51. The engaging portion 521 is located at the intermediate section 52b. It is exposed, so that when the male buckle 1 and the female buckle 2 need to be released, the user only needs to press the trigger section 52a to make the engaging part 521 away from the mating cavity 21. The direction of the cavity wall 212 is disengaged from the engaging portion 211 , so that the male buckle 1 and the female buckle 2 can be pulled out from each other. The middle section 52b is stored in the mating cavity 21 after the mating plug 11 is inserted into the mating cavity 21 and is in contact with the cavity wall 212. Since the engaging part 521 is located at the middle segment 52b, the engaging part 521 is inserted into the mating plug 11. During the process of mating the cavity 21 , it interferes with the cavity wall 212 until the engaging portion 521 slides to the position of the engaging portion 211 . More specifically, the trigger section 52a protrudes outward relative to the middle section 52b and forms a step with the middle section 52b. The engaging portion 521 is located in front of the step along the direction in which the mating plug 11 is inserted into the mating cavity 21, and the step is in front of the mating plug 11. After being inserted into the mating cavity 21, it resists and limits the position with the male buckle 1, as shown in Figure 7 or 8; since the trigger section 52a protrudes outward relative to the middle section 52b, after the mating plug 11 is inserted into the mating cavity 211, it is The release space provided by the trigger section 52a is increased, which is more convenient for the user to release the lock; preferably, the trigger section 52a is flush with the side wall 22 of the female buckle 2 after the plug 11 is inserted into the mating cavity 21, and the trigger The section 52a is also flush with the side wall 12 of the male buckle 1, so that the magnetic chest buckle 100 of the present invention is more elegant, compact in structure and reasonable in space layout, but not limited thereto.

Please refer to FIG. 7 and FIG. 8, the first magnetic structure 3 is opposite to the second magnetic structure 4 along the direction in which the pair of plugs 11 are inserted into the mating cavity 21, so that the first magnetic structure 3 and the second magnetic structure 4 The magnetic force is more concentrated and effective, so that the fastening between the male buckle 1 and the female buckle 2 in the magnetic chest buckle 100 of the present invention is more reliable. Specifically, the first magnetic structure 3 is located at the mating plug 11, and the second magnetic structure 4 is located in the mating cavity 21; when the male snap 1 has the mating cavity 21 and the female snap 2 has the mating plug 11, the second magnetic structure at this time The magnetic structure 4 is located at the mating plug 11, and the first magnetic structure 3 is located in the mating cavity 21; preferably, the first magnetic structure 3 is built in the mating plug 11, which is conducive to saving space; and the first magnetic structure 3 is also Adjacent to the pair of plugs 11 facing the end face of the mating cavity 21, so that during the process of inserting the pair of plugs 11 into the mating cavity 21, the first magnetic structure 3 and the second magnetic structure 4 are more closely attached, so that the first magnetic structure 3 The magnetic force between the second magnetic structure 4 is more concentrated and effective, and the fastening speed of the male buckle 1 and the female buckle 2 is accelerated, but not limited thereto.

Referring to Fig. 4, Fig. 6, Fig. 7 and Fig. 8, the plug 11 is provided with an active space 111 for the elastic deformation of the movable end 52, by means of the active space 111, it is beneficial for the movable end 52 to be inserted into the plug 11. The cavity 21 is elastically deformed, or elastically deformed when the male buckle 1 and the female buckle 2 are released. Specifically, the movable space 111 runs through a side of the pair of plugs 11 facing away from the engaging portion 521 . In order to limit the elastic deformation range of the movable end 52, the magnetic chest buckle 100 of the present invention also includes a limit cover 6, and the limit cover 6 and the plug 11 are combined to cover the movable space 111; of course, when the limit cover 6 is not needed To limit the elastic deformation range of the movable end 52, the limit cover 6 can be deleted at this time, so it is not limited thereto.

Please refer to Figures 1 to 6, the male buckle 1 and the female buckle 2 are respectively provided with piercing holes 13 and 23 for braiding, and the piercing holes 13 on the male buckle 1 are arranged along the length direction of the male buckle 1 and located at The male button 1 is at the side wall 12 in the length direction, and the piercing hole 23 on the female button 2 is arranged along the length direction on the female button 2 and is located at the side wall 22 of the female button 2 in the length direction, so that the braid can be worn through There are more diverse ways of setting. It can be understood that, in order to adapt to other occasions where the braid is placed, the piercing holes 13 on the male buckle 1 can also be arranged along the width direction of the male buckle 1 and located at the side wall 12 of the male buckle 1 in the width direction. The piercing hole 23 on the buckle 2 can also be arranged along the width direction of the female buckle 2 and located at the side wall 22 of the female buckle 2 in the width direction, so it is not limited thereto.

In conjunction with the accompanying drawings, the working principle of the magnetic chest buckle 100 of the present invention is explained: when the male buckle 1 and the female buckle 2 need to be fastened together, the user holds the male buckle 1 with one hand and the other Hold the female buckle 2 with your hand, and then insert the mating plug 11 of the male buckle 1 into the mating cavity 21 of the female buckle 2; wherein, during the process of inserting the mating plug 11 into the mating cavity 21, the movable end 52 is locked by the engaging part 521 The wall of the mouth 213 of the mating chamber 21 is pushed to elastically deform away from the wall 212 of the mating chamber 21, so that the engaging portion 521 enters into the mating chamber 21 and moves along the wall of the mating chamber 21. 212 slides to the matching part 211, and the elastically deformed movable end 52 keeps the engaging part 521 in elastic contact with the cavity wall 212 of the mating cavity 21 until the engaging part 521 slides to match the matching part 211. Engagement position; when the engaging portion 521 slides to the position engaging with the engaging portion 211, the movable end 52 is elastically reset at this time to achieve the purpose of engaging the engaging portion 521 with the engaging portion 211; When it is necessary to release the lock between the male buckle 1 and the female buckle 2, press down the trigger section 52a of the elastic arm 5, so that the engaging part 521 is disengaged from the engaging part 211 and allows the mating plug 11 to be pulled out from the mating cavity 21 . When the first magnetic structure 3 and the second magnetic structure 4 are magnetically attracted to each other, the mating plug 11 can be inserted into the mating cavity 21 more quickly; when the first magnetic structure 3 and the second magnetic structure 4 are magnetically repelling each other, so that It is easier to separate the mating plug 11 from the mating cavity 21 .

Compared with the prior art, since the elastic arm 5 is fixed on the fixed end 51 of the plug 11 and the movable end 52 elastically deformed relative to the fixed end 51, the movable end 52 is provided with an engaging portion 521, which has a mating cavity 21 The male buckle 1 or the female buckle 2 has a matching part 211 for engaging with the engaging part 521, and the movable end 52 always makes the engaging part 521 have a tendency to keep engaging with the engaging part 211, so when pairing When the plug 11 is inserted into the mating cavity 21, the engaging part 521 is quickly engaged with the matching part 211 under the elastic action of the movable end 52, so that the buckling operation between the male buckle 1 and the female buckle 2 More convenient; and because the first magnetic structure 3 is arranged on the male button 1, and the second magnetic structure 4 is arranged on the female button 2, so in the process of inserting the pair of plugs 11 into the mating chamber 21, the first magnetic structure 3 and the second The two magnetic structures 4 are mutually magnetically attracted or magnetically repelled, so that the plug-in or pull-out operation between the male buckle 1 and the female buckle 2 is very convenient, and the first magnetic structure 3 and the second magnetic structure 4 are magnetically attracted to each other At the same time, the fastening between the male buckle 1 and the female buckle 2 after mating is made more stable, and the reliability of the fastening between the male buckle 1 and the female buckle 2 is further increased. In addition, the combination of the first magnetic structure 3, the second magnetic structure 4 and the elastic arm 5 can realize the convenience of the plug-in operation between the male buckle 1 and the female buckle 2, so the magnetic chest buckle 100 of the present utility model The structure is more compact.

It should be noted that the direction in which the plug 11 is inserted into the mating cavity 21 is the direction indicated by the arrow A in Figure 5; the direction in which the plug 11 is pulled out of the mating cavity 21 is the opposite direction indicated by the arrow A in Figure 5 ; The length direction of the male buckle 1 and the female buckle 2 is the direction indicated by the arrow A in Figure 5 and the opposite direction; the width direction of the male buckle 1 and the female buckle 2 is the double arrow B in Figure 5 direction; the height direction of the male buckle 1 and the female buckle 2 is the direction indicated by the double arrow C in Figure 5 or Figure 7 .

The above disclosures are only preferred examples of the utility model, and cannot limit the scope of rights of the utility model. Therefore, equivalent changes made according to the claims of the utility model all belong to the scope covered by the utility model.

Claims (21)

1. A magnetic chest buckle, comprising a male buckle and a female buckle, one of the male buckle and the female buckle has a pair of plugs, and the other of the male buckle and the female buckle has a pair of plugs that match the pair of plugs Inserting cavity, characterized in that the magnetic chest buckle also includes a first magnetic structure, a second magnetic structure and an elastic arm, and the elastic arm includes a fixed end fixed on the pair of plugs and is selectively fixed relative to the The movable end is elastically deformed and suspended in the air. The movable end is provided with a locking part, and the male buckle or the female buckle with the mating cavity is provided with a matching part for engaging with the locking part. , the movable end always has a tendency to keep the engaging part engaged with the engaging part, the first magnetic structure is arranged on the male buckle, and the second magnetic structure is arranged on the On the female buckle; during the interlocking process of the male buckle and the female buckle, the pair of plugs are inserted into the mating cavity so that the engaging part is in contact with the matching part under the elastic action of the movable end engaged, and the first magnetic structure and the second magnetic structure are magnetically attracted or repulsed to each other. 2. The magnetic chest buckle according to claim 1, wherein the movable end is staggered in the direction in which the pair of plugs are inserted into the mating chamber during the insertion of the pair of plugs into the mating chamber Elastic deformation is produced, thereby allowing the engaging portion to slide to a position engaged with the engaging portion. 3. The magnetic chest buckle according to claim 2, characterized in that, when the pair of plugs are inserted into the mating chamber, the engaging part is pushed by the wall of the mating chamber to drive the The movable end is elastically deformed away from the cavity wall of the insertion cavity. 4. The magnetic chest buckle according to claim 1, wherein the engaging portion has an inclined guide surface, and the inclined guide surface is outward along the direction in which the pair of plugs are pulled out of the pair of insertion chambers tilt. 5 . The magnetic chest buckle according to claim 4 , wherein the opening of the mating cavity has an inclined matching guide surface matching the inclined guiding surface. 6 . 6 . The magnetic chest buckle according to claim 1 , wherein the engaging portion is formed at a cavity wall of the mating cavity. 7 . 7 . The magnetic chest buckle according to claim 6 , wherein the engaging portion is a hook structure, and the engaging portion is a slot structure communicating with the mating cavity. 7 . 8. The magnetic chest buckle according to claim 6, wherein the engaging part is a slotted hole structure, and the engaging part is formed on the upper cavity wall of the mating cavity and protrudes downward. raised structure. 9 . The magnetic chest buckle according to claim 1 , wherein the length direction of the elastic arm is the same as the length direction or width direction of the male buckle or the female buckle with the pair of plugs. 10 . The magnetic chest buckle according to claim 1 , wherein the pair of plugs is inserted into the mating cavity along the length direction or width direction of the male buckle or the female buckle having the pair of plugs. 11 . 11 . The magnetic chest buckle according to claim 10 , wherein the male buckle and the female buckle are mutually extended in the length direction or the width direction after the pair of plugs are inserted into the mating cavity. 12 . The magnetic chest buckle according to claim 6 , wherein at least a part of the movable end is exposed after the pair of plugs are inserted into the pair insertion cavity. 13 . 13. The magnetic chest buckle according to claim 12, wherein the movable end includes a trigger section and an intermediate section connected between the trigger section and the fixed end, and the engaging part is located in the intermediate section , the trigger segment is exposed after the pair of plugs are inserted into the mating cavity. 14. The magnetic chest buckle according to claim 13, characterized in that, the trigger section protrudes outward relative to the middle section and forms a step with the middle section, and the engaging portion is along the pair of The direction in which the plug is inserted into the mating cavity is located in front of the step, and the step resists and limits the position with the male buckle or the female buckle having the mating cavity after the pair of plugs are inserted into the mating cavity. 15 . The magnetic chest buckle according to claim 1 , wherein the first magnetic structure is opposite to the second magnetic structure along the direction in which the pair of plugs are inserted into the mating cavity. 16. The magnetic chest buckle according to claim 15, wherein the first magnetic structure or the second magnetic structure is located at the pair of plugs. 17. The magnetic chest buckle according to claim 16, characterized in that, the first magnetic structure or the second magnetic structure is built into the pair of plugs, and the first magnetic structure or the second magnetic structure is also adjacent to The mating plug faces the end surface of the mating cavity. 18. The magnetic chest buckle according to claim 1, wherein the pair of plugs is provided with an activity space for the elastic deformation of the movable end, and the activity space runs through the pair of plugs and faces away from the engaging side of the department. 19. The magnetic chest buckle according to claim 18, further comprising a limit cover, the limit cover is combined with the pair of plug covers to cover the activity space, and the limit cover limits the movement The range of elastic deformation of the end. 20. The magnetic chest buckle according to claim 1, wherein each of the male buckle and the female buckle is provided with a piercing hole for braiding. 21. The magnetic chest buckle according to claim 20, characterized in that, the piercing holes on the male buckle are arranged along the length direction of the male buckle and are located at the side wall of the male buckle in the length direction, so that The piercing holes on the female buckle are arranged along the length direction of the female buckle and are located at the side wall of the female buckle in the length direction.