Butterfly watch buckle and watch

Abstract

The utility model provides a butterfly watch buckle and a watch, the butterfly watch buckle comprises a frame making assembly, a first core making assembly and a second core making assembly, and the butterfly watch buckle is connected with a watchband through the first core making assembly and the second core making assembly respectively; the first core making assembly comprises a first core making main body, a fixing piece and a watchband connecting piece, the watchband connecting piece is provided with a plurality of mounting positions, the mounting positions are distributed in the length direction of the watchband connecting piece, and the distance between every two adjacent mounting positions is smaller than the distance between every two adjacent buckle holes in a watchband; the watchband connecting piece is assembled on the first core making main body through a fixing piece penetrating through one mounting position, and when the watchband connecting piece and the first core making main body are assembled together through different mounting positions, the connecting position of the watchband and the first core making assembly correspondingly changes in the length direction of the frame making main body of the frame making assembly. According to the utility model, the watch wearing length can be finely adjusted.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of watches, and more specifically, to a butterfly clasp and a watch. Background Art

[0002] Currently, the butterfly clasps used in the watch industry are usually composed of a frame and a core connected by a rotating shaft. When the watch needs to be removed, the core is driven to flip away from the frame, increasing the overall length of the watch band so that the watch can be taken off the wrist.

[0003] In watches using the above butterfly clasps, the wearing length is usually adjusted by means of buckle holes provided on the watch band. However, due to the relatively large spacing between the buckle holes on the watch band, it is impossible to meet the adjustment of smaller lengths. Summary of the Utility Model

[0004] The technical problem to be solved by the present utility model is to provide a new butterfly clasp and a watch for the problem that the watch band using a butterfly clasp cannot achieve the adjustment of a smaller wearing length.

[0005] The technical solution of the present utility model to solve the above technical problems is to provide a butterfly clasp, including a frame assembly, a first core assembly, and a second core assembly, and the butterfly clasp is respectively connected to the watch band through the first core assembly and the second core assembly; the frame assembly includes a frame body, the first core assembly includes a first core body, the second core assembly includes a second core body, and the tails of the first core body and the second core body are respectively hinged to both ends of the frame body;

[0006] The first core assembly further includes a fixing member and a watch band connecting member for connecting the watch band. The watch band connecting member has a plurality of mounting positions, and the plurality of mounting positions are distributed along the length direction of the watch band connecting member, and the spacing between adjacent mounting positions is smaller than the spacing between adjacent buckle holes on the watch band; the watch band connecting member is assembled on the first core body through a fixing member passing through one of the mounting positions, and when the watch band connecting member is assembled with the first core body through different mounting positions, the connection position of the watch band and the first core assembly changes correspondingly along the length direction of the frame body.

[0007] As a further improvement of the present utility model, the first core body includes a hinge portion, a first arm, and a second arm, and the first core body is hinged to the frame body through the hinge portion. The first arm and the second arm are respectively connected to the hinge portion and form a U-shaped notch at the front end of the hinge portion;

[0008] The strap connecting member includes a slider portion, and a plurality of the mounting positions are respectively constituted by a plurality of first through holes penetrating through two side walls perpendicular to the width direction of the strap in the slider portion, and the plurality of first through holes are distributed along the length direction of the slider portion; the fixing member is constituted by a steel pin, and the steel pin passes through any one of the first through holes to hinge and fix the slider portion at the U-shaped notch.

[0009] As a further improvement of the present utility model, the steel pin includes an intermediate section inserted into the first through hole of the slider portion, and the outer peripheral surface of the intermediate section has a first concave portion axially provided;

[0010] The diameter of the first through hole is adapted to the diameter of the intermediate section of the steel pin, and the plurality of first through holes are sequentially communicated in the radial direction, and the width of the communication position between two adjacent first through holes is smaller than the diameter of the intermediate section of the steel pin and larger than the distance between the bottom wall of the first concave portion and the tangent plane parallel to the bottom wall.

[0011] As a further improvement of the present utility model, the inner side wall of the first arm has a first blind hole, and the second arm has a second through hole, and one end of the steel pin is inserted into the first blind hole and the other end is inserted into the second through hole;

[0012] The outer peripheral surface of the portion of the steel pin inserted into the second through hole has an axial second concave portion, and the second concave portion and the first concave portion are radially offset on the steel pin; the outer side wall of the second arm has a second blind hole radially communicated with the second through hole, and when the steel pin is inserted into the second through hole, the second concave portion faces the second blind hole and cooperates with the steel nail inserted into the second blind hole to prevent the steel pin from rotating.

[0013] As a further improvement of the present utility model, when the steel pin is assembled to the first core body, the included angle between the first concave portion and the length direction of the slider portion is greater than 20° and less than 70°.

[0014] As a further improvement of the present utility model, the lower surface of the first core body has a groove, the groove is arranged along the length direction of the first core body and extends from the hinge portion to the lower sides of the first arm and the second arm, and the width of the groove is greater than the width of the U-shaped notch;

[0015] The slider part includes two first side walls perpendicular to the width direction of the watch band, and the distance between the two first side walls is less than the width of the U-shaped notch; two prominent first flat positions are respectively provided on the two first side walls, and the two first flat positions are respectively located in the middle of the length direction of the slider part and adjacent to the lower surface of the slider part. The distance between the outer side surfaces of the two first flat positions is adapted to the width of the groove, and when the first flat position and the slider part are hinged and fixed in the U-shaped notch, the angle of rotation of the slider part around the steel needle is limited by the cooperation between the first flat position and the bottom wall of the groove.

[0016] As a further improvement of the present invention, two prominent second flat positions are provided on the two first side walls, and the two second flat positions are respectively located at the tail ends of the length direction of the slider part. The distance between the outer side surfaces of the two second flat positions is adapted to the width of the groove, and when the slider part is hinged and fixed in the U-shaped notch, the cooperation between the second flat position and the bottom wall of the groove prevents the head end of the slider part from flipping downward towards the first core body.

[0017] As a further improvement of the present invention, the watch band connecting member includes a head connected to the upper surface of the head end of the slider part, and when the slider part is assembled in the U-shaped notch, the head protrudes above the upper surfaces of the first arm and the second arm; the head has a third through hole, and the watch band is connected to the first core assembly through a screw group passing through the third through hole;

[0018] The slider part further includes a fourth through hole located below the head and a spring wave nail inserted in the fourth through hole, and the slider part prevents the head end of the slider part from flipping upward towards the first core body through the spring wave nail.

[0019] As a further improvement of the present invention, the frame body is in an H shape; the first core body and the second core body respectively include two second side walls perpendicular to the width direction of the watch band, and each second side wall has a countersunk hole; the frame assembly further includes a button installed on the frame body and a telescopic needle head driven by the button to expand and contract, and the frame assembly locks the first core body and the second core body to the frame body by inserting the telescopic needle head into the countersunk holes of the first core body and the second core body;

[0020] The second core assembly includes a face cover hinged to the head end of the second core body, and the face cover has a locking bolt for connecting to the watch band.

[0021] The present invention also provides a watch, including a watch head, a watch band and the butterfly watch buckle as described above.

[0022] The utility model has the following beneficial effects: By providing a plurality of mounting positions on the strap connecting member that are distributed along the length direction of the first core body, the strap connecting member can be assembled to the first core body by passing a fixing member through different mounting positions to adjust the wearing length of the strap, thereby realizing fine adjustment of the wearing length of the watch. Description of the Drawings

[0023] Figure 1 FIG. 6 is a schematic structural view of the butterfly buckle provided by an embodiment of the utility model.

[0024] Figure 2 FIG. 10 is an exploded structural view of the butterfly buckle provided by an embodiment of the utility model.

[0025] Figure 3 FIG. 14 is a partial exploded structural view of the butterfly buckle provided by an embodiment of the utility model.

[0026] Figure 4 FIG. 18 is a schematic connection structure view of the strap connecting member and the first core body in the butterfly buckle provided by an embodiment of the utility model.

[0027] Figure 5 FIG. 22 is a schematic view of the butterfly buckle provided by an embodiment of the utility model in a fine adjustment state.

[0028] Figure 6 FIG. 26 is a schematic view of the butterfly buckle provided by an embodiment of the utility model for fine adjustment of the wearing length. Detailed Embodiment

[0029] In order to make the purpose, technical solutions and advantages of the utility model more clear and understandable, the following further details the utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0030] As Figures 1 - 3 shown, FIG. 36 is a schematic view of the butterfly buckle provided by an embodiment of the utility model. The butterfly buckle of the utility model can be applied to a watch, especially a watch with a leather strap. Specifically, the butterfly buckle of this embodiment includes a frame assembly 10, a first core assembly 20 and a second core assembly 30, and the butterfly buckle is respectively connected to the strap through the first core assembly 20 and the second core assembly 30. The above-mentioned frame assembly 10 includes a frame body 11, the first core assembly 20 includes a first core body 21, the second core assembly 30 includes a second core body 31, and the tail ends of the first core body 21 and the second core body 31 are respectively hinged to both ends of the frame body 11 and can rotate relative to the frame body 11 and be buckled to the frame body 11. The hinge connection method of the first core body 21, the second core body 31 and the frame body 11 can adopt the conventional structure in the art and will not be elaborated herein.

[0031] In addition to the core-making main body 21, the first core-making assembly 20 described above further includes a fixing member and a watchband connecting member 22 for connecting the watchband. The watchband connecting member 22 has a plurality of mounting positions, which are distributed along the length direction of the watchband connecting member 22, and the distance between adjacent mounting positions is smaller than the distance between adjacent buckle holes on the watchband. The watchband connecting member 22 is assembled on the first core-making main body 21 through a fixing member passing through one of the mounting positions. When the watchband connecting member 22 is assembled with the first core-making main body 21 through different mounting positions, the connection position of the watchband and the first core-making assembly 20 changes correspondingly along the length direction of the frame main body 11, so that the wearing length of the watch also changes correspondingly.

[0032] For the above-mentioned butterfly buckle, by providing a plurality of mounting positions distributed along the length direction of the first core-making main body 21 on the watchband connecting member 22, the wearing length of the watchband can be adjusted by passing the fixing member through different mounting positions to assemble the watchband connecting member 22 to the first core-making main body 21. And since the distance between adjacent mounting positions is smaller than the distance between adjacent buckle holes on the watchband, fine adjustment of the wearing length of the watch can be achieved (for example, the adjusted length is less than the distance between two buckle holes on the watchband).

[0033] In an embodiment of the present invention, the above-mentioned first core-making main body 21 includes a hinge portion 213, a first arm 211, and a second arm 212. The hinge portion 213 is located at the tail end of the first core-making main body 21, and the first core-making main body 21 is hinged to the frame main body 11 through the hinge portion 213. The first arm 211 and the second arm 212 are respectively connected to the hinge portion 213 and form a U-shaped notch 214 at the front end of the hinge portion 213, that is, the hinge portion 213, the first arm 211, and the second arm 212 are connected in a U shape.

[0034] Correspondingly, the above-mentioned watchband connecting member 22 includes a slider portion 221. Those skilled in the art can understand that the slider portion 221 is in the shape of a strip arranged along the length direction of the watchband. The plurality of mounting positions are respectively constituted by a plurality of first through holes 2211 penetrating through two side walls perpendicular to the width direction of the watchband of the slider portion 221, and the plurality of first through holes 2211 are distributed along the length direction of the slider portion 221. The fixing member is constituted by a steel needle 231, and the steel needle 231 passes through one of the first through holes 2211 to hinge and fix the slider portion 221 at the U-shaped notch 214. That is, the above-mentioned slider portion 221 can slide at the U-shaped notch 214 to adjust the first through hole 2211 that cooperates with the steel needle 231, so as to realize fine adjustment of the wearing length of the watch.

[0035] Realizing the fine adjustment of the wearing length of the watch through the matching structure of the steel needle 231 and the first through hole 2211 not only has a simple structure, but also makes the connection between the watchband connecting member 22 and the first core-making main body 21 stable and reliable.

[0036] Combined with Figure 4 、 Figure 5 As shown, in an embodiment of the present utility model, the above-mentioned steel needle 231 includes an intermediate section inserted into the first through hole 2211 of the slider portion 221. An axially arranged first recess 2311 is provided on the outer peripheral surface of the intermediate section. Correspondingly, the diameter of the first through hole 2211 is adapted to the diameter of the intermediate section of the steel needle 231 (for example, the diameter of a through hole 2211 is equal to or slightly larger than the diameter of the intermediate section), so as to facilitate the insertion of the steel needle 231 into the first through hole 2211 without relative shaking. A plurality of first through holes 2211 are sequentially communicated in the radial direction, and the width of the communication position between two adjacent first through holes 2211 is smaller than the diameter of the intermediate section of the steel needle 231 and larger than the distance between the bottom wall of the first recess 2311 and a section parallel to the bottom wall. That is, only when the bottom wall of the first recess 2311 is parallel to the length direction of the slider portion 221, the steel needle 231 can move from one first through hole 2211 to an adjacent first through hole 2211.

[0037] With the above structure, the position of the slider portion 221 relative to the steel needle 231 can be adjusted by making the length direction of the slider portion 221 parallel to the bottom wall of the first recess 2311 on the steel needle 231. As Figure 4 shown, it greatly facilitates the position adjustment of the slider portion 221, that is, it facilitates the fine-tuning operation of the wearing length of the watch.

[0038] As Figure 3 shown, in an embodiment of the present utility model, a first blind hole 2111 (the first blind hole 2111 can also be a through hole) is provided on the inner side wall of the above-mentioned first arm 211, and a second through hole 2121 is provided on the second arm (it can be understood that the above-mentioned first blind hole 2111 and the second through hole 2121 are coaxial). One end of the steel needle 231 is inserted into the first blind hole 2111, and the other end is inserted into the second through hole 2121. Moreover, an axial second recess 2312 is provided on the outer peripheral surface of the part of the steel needle 231 inserted into the second through hole 2121, and the second recess 2312 and the first recess 2311 are radially offset on the steel needle 231. A second blind hole 2122 radially communicated with the second through hole 2121 is provided on the outer side wall of the second arm 212. When the steel needle 231 is inserted into the second through hole 2121, the second recess 2312 faces the second blind hole 2122 and cooperates with the steel nail 232 inserted into the second blind hole 2122 to prevent the steel needle 231 from rotating. Specifically, the steel nail 232 can be tightly fitted with the second blind hole 2122 or fixed in the second blind hole 2122 by a threaded connection method.

[0039] During assembly, the slider portion 221 can be first placed in the U-shaped notch 214 of the first core body 21, and at least one first through hole 2211 is coaxial with the second through hole 2121. Then, one end of the steel pin 231 is inserted into the second through hole 2121 from the outside of the second arm 212. One end of the steel pin 231 sequentially passes through the second through hole 2121, the first through hole 2211 and then is inserted into the first blind hole 2111. Then, the steel nail 232 is inserted into the second blind hole 2122 to fix the steel pin 231. With the above structure, the rotation of the steel pin 231 can be effectively avoided, and at the same time, the structure and assembly operation of the steel pin 231 are relatively simple.

[0040] In an embodiment of the present utility model, when the steel pin 231 hinges and fixes the slider portion 221 in the U-shaped notch 214, the included angle between the first concave portion 2311 and the length direction of the slider portion 221 is greater than 20° and less than 70°, so as to facilitate the rotation of the slider portion 221, so that the steel pin 231 can be switched from one of the first through holes 2211 of the slider portion 221 to other first through holes 2211 to realize the adjustment of the wearing length. In particular, the included angle between the first concave portion 2311 and the length direction of the slider portion 221 is about 40°.

[0041] To realize the rotation limit of the slider portion 221, in an embodiment of the present utility model, the lower surface of the above-mentioned first core body 21 has a groove 215, which is arranged along the length direction of the first core body 21 and extends from the hinge portion 213 to the lower sides of the first arm 211 and the second arm 212, and the width of the groove 215 is greater than the width of the U-shaped notch 214. Correspondingly, the slider portion 221 includes two first side walls perpendicular to the width direction of the watch band, and the distance between the two first side walls is less than the width of the U-shaped notch 214. The two first side walls are respectively provided with protruding first flat positions 2215, and the two first flat positions 2215 are respectively located in the middle of the length direction of the slider portion 221 and adjacent to the lower surface of the slider portion 221. The distance between the outer sides of the two first flat positions 2215 is adapted to the width of the groove 215, and when the first flat position 2215 and the slider portion 221 are hinged and fixed in the U-shaped notch 214, the rotation angle of the slider portion 221 around the steel pin 231 is limited by the cooperation between the first flat position 2215 and the bottom wall of the groove 215. That is, when the first flat position 2215 abuts against the bottom wall of the groove 215, the rotation angle of the slider portion 221 is the largest. The position of the first flat position 2215 on the first side wall of the slider portion 221 can be designed according to the predetermined maximum rotation angle of the slider portion 221. Of course, in practical applications, other structures can also be used to limit the rotation angle of the slider portion 221, but the solution of this embodiment has a relatively simple structure.

[0042] In an embodiment of the present utility model, the two first side walls further have protruding second flat positions 2213. The two second flat positions 2213 are respectively located at the tail ends in the length direction on the slider part 221. The distance between the outer side surfaces of the two second flat positions 2213 is adapted to the width of the groove 215. When the slider part 221 is hinged and fixed in the U-shaped notch, the cooperation between the second flat position 2213 and the bottom wall of the groove 215 prevents the head end of the slider part 221 from flipping downward towards the first core body 21. That is, the second flat position 2213 prevents the head end of the slider part 221 from flipping downward towards the first core body 21 by abutting against the bottom wall of the groove 215. Of course, in practical applications, other structures can also be used to prevent the head end of the slider part 221 from flipping downward towards the first core body 21, but the solution of this embodiment has a relatively simple structure.

[0043] In an embodiment of the present utility model, the above-mentioned watchband connecting member 22 includes a head 222 connected to the upper surface of the head end of the slider part 221. When the slider part 222 is fixed in the U-shaped notch 214, the head 222 protrudes above the upper surfaces of the first arm 211 and the second arm 212. The head 222 has a third through hole 2221. The watchband is connected to the first core assembly 20 through a screw group passing through the third through hole 2221. Specifically, the above-mentioned screw group can be composed of a first needle-shaped member 242 with a bolt part and a second needle-shaped member 241 with a screw hole. The slider part 221 further includes a fourth through hole 2212 located below the head 222 and a spring wave nail 25 inserted into the fourth through hole 2212. The slider part 221 prevents the head end of the slider part 221 from flipping upward towards the first core body 21 through the spring wave nail 25, so that the slider part 221 remains stable in the wearing state (that is, it will not rotate around the steel needle 231 and cause a change in the wearing length). Since the end of the spring wave nail 25 has a telescopic ball head, when the slider part 221 is not subjected to external force, the ball head at the end of the spring wave nail 25 abuts against the bottom wall of the groove 215, preventing the head end of the slider part 221 from flipping upward towards the first core body 21. When an upward thrust is applied to the head of the slider part 221, the ball head retracts under the push of the bottom wall of the groove 215, so that the head of the slider part 221 can flip upward. In practical applications, other structures can also be used to prevent the head of the slider part 221 from flipping upward towards the first core body 21, which will not be elaborated here.

[0044] In an embodiment of the present utility model, the frame body 11 is in an H shape; correspondingly, the first core body 21 and the second core body 31 respectively include two second side walls perpendicular to the width direction of the watch band, and each second side wall is provided with a countersunk hole 2124; the frame assembly 10 further includes a button 12 installed on the frame body 11 and a telescopic needle 13 driven by the button 12 to expand and contract, and the frame assembly 10 locks the first core body 21 and the second core body 31 on the frame body 11 by inserting the telescopic needle 13 into the countersunk holes 2124 of the first core body 21 and the second core body 31, so as to maintain stability during wearing. When it is necessary to take off the watch, push the button 12 so that the telescopic needle 13 retracts into the inner side wall of the frame body 11, and the locking of the first core body 21 and the second core body 31 can be released.

[0045] In addition, the second core assembly 30 further includes a face cover 32 hinged to the first end of the second core body 31, and the face cover 32 is provided with a locking bolt 321 for connecting with the watch band. The structures of the above-mentioned face cover 32, locking bolt and the assembly of the face cover 32 to the second core body 31 can all adopt the conventional structures in the art, and will not be elaborated herein.

[0046] The present utility model also provides a watch, which includes a watch head, a watch band and the butterfly buckle as described above.

[0047] As mentioned above, only the preferred specific embodiments of the present utility model are described, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A butterfly watch buckle, comprising a frame assembly, a first core assembly, and a second core assembly, and the butterfly watch buckle is connected to a watch band through the first core assembly and the second core assembly respectively; the frame assembly includes a frame body, the first core assembly includes a first core body, the second core assembly includes a second core body, and the tails of the first core body and the second core body are respectively hinged to both ends of the frame body; characterized in that: The first core assembly further includes a fixing member and a watch band connecting member for connecting the watch band. The watch band connecting member has a plurality of mounting positions, and the plurality of mounting positions are distributed along the length direction of the watch band connecting member, and the distance between adjacent mounting positions is smaller than the distance between adjacent buckle holes on the watch band; the watch band connecting member is assembled on the first core body through a fixing member passing through one of the mounting positions, and when the watch band connecting member is assembled with the first core body through different mounting positions, the connection position of the watch band and the first core assembly changes correspondingly along the length direction of the frame body.

2. The butterfly watch buckle according to claim 1, characterized in that, The first core body includes a hinge portion, a first arm, and a second arm, and the first core body is hinged to the frame body through the hinge portion. The first arm and the second arm are respectively connected to the hinge portion and form a U-shaped notch at the front end of the hinge portion; The watch band connecting member includes a slider portion. The plurality of mounting positions are respectively constituted by a plurality of first through holes penetrating through two side walls perpendicular to the width direction of the watch band of the slider portion, and the plurality of first through holes are distributed along the length direction of the slider portion; the fixing member is constituted by a steel needle, and the steel needle passes through any one of the first through holes to hinge and fix the slider portion at the U-shaped notch.

3. The butterfly watch buckle according to claim 2, characterized in that, The steel needle includes an intermediate section inserted into the first through hole of the slider portion, and the outer peripheral surface of the intermediate section has an axially arranged first recess; The diameter of the first through hole is adapted to the diameter of the intermediate section of the steel needle. The plurality of first through holes are sequentially communicated in the radial direction, and the width of the communication position between adjacent two first through holes is smaller than the diameter of the intermediate section of the steel needle and larger than the distance between the bottom wall of the first recess and the tangent plane parallel to the bottom wall.

4. The butterfly watch buckle according to claim 3, characterized in that, The inner side wall of the first arm has a first blind hole, and the second arm has a second through hole. One end of the steel needle is inserted into the first blind hole and the other end is inserted into the second through hole; The outer peripheral surface of the part of the steel needle inserted into the second through hole has an axial second recess, and the radial positions of the second recess and the first recess on the steel needle are staggered; there is a second blind hole radially communicated with the second through hole on the outer side wall of the second arm, and when the steel needle is inserted into the second through hole, the second recess faces the second blind hole and cooperates with the steel nail inserted into the second blind hole to prevent the steel needle from rotating.

5. The butterfly watch buckle according to claim 4, characterized in that, When the steel needle is assembled to the first core body, the included angle between the first recess and the length direction of the slider portion is greater than 20° and less than 70°.

6. The butterfly watch buckle according to claim 5, characterized in that, The lower surface of the first core body has a groove, which is arranged along the length direction of the first core body and extends from the hinge part to the lower sides of the first arm and the second arm, and the width of the groove is greater than the width of the U-shaped notch; The slider part includes two first side walls perpendicular to the width direction of the watch band, and the distance between the two first side walls is less than the width of the U-shaped notch; two protruding first flat positions are respectively provided on the two first side walls, and the two first flat positions are respectively located in the middle of the length direction of the slider part and adjacent to the lower surface of the slider part. The distance between the outer side surfaces of the two first flat positions is adapted to the width of the groove, and when the first flat position and the slider part are hinged and fixed in the U-shaped notch, the angle of rotation of the slider part around the steel needle is limited by the cooperation between the first flat position and the bottom wall of the groove.

7. The butterfly buckle according to claim 6, characterized in that, Two protruding second flat positions are provided on the two first side walls, and the two second flat positions are respectively located at the tail ends of the length direction of the slider part. The distance between the outer side surfaces of the two second flat positions is adapted to the width of the groove, and when the slider part is hinged and fixed in the U-shaped notch, the cooperation between the second flat position and the bottom wall of the groove prevents the head end of the slider part from flipping downward towards the first core body.

8. The butterfly watch buckle according to any one of claims 2-7, characterized in that, The watch band connecting piece includes a head connected to the upper surface of the head end of the slider part, and when the slider part is assembled in the U-shaped notch, the head protrudes above the upper surfaces of the first arm and the second arm; the head has a third through hole, and the watch band is connected to the first core assembly through a screw group passing through the third through hole; The slider part further includes a fourth through hole located below the head and a spring stud inserted in the fourth through hole, and the slider part prevents the head end of the slider part from flipping upward towards the first core body through the spring stud.

9. The butterfly watch buckle according to any one of claims 1-7, characterized in that, The shown frame body is in an H shape; the first core body and the second core body respectively include two second side walls perpendicular to the width direction of the watch band, and each second side wall has a countersunk hole; the frame assembly further includes a button installed on the frame body and a telescopic needle driven by the button to expand and contract, and the frame assembly locks the first core body and the second core body on the frame body by inserting the telescopic needle into the countersunk holes of the first core body and the second core body; The second core assembly includes a face cover hinged to the head end of the second core body, and the face cover has a locking bolt for connecting to the watch band.

10. A watch, characterized in that, It includes a watch head, a watch band, and the butterfly watch buckle according to any one of claims 1-9.

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