CN113660881B - Belt buckle - Google Patents

Abstract

The invention provides a buckle capable of mutually connecting and disconnecting various parts, which comprises plugs (12, 76) and sockets (14, 78). The plug (12, 76) includes a pair of elastically deformable tabs (32, 80). The socket (14, 78) includes a tab (66, 82) that is compressible against a pair of tabs (32, 80). The pair of protruding pieces (32, 80) are arranged in the left-right direction intersecting the insertion direction of the plug (12, 76). Base portions (66 b, 82 b) of the projections (66, 82) on the opposite side of the insertion opening (40 a) of the receptacle (14, 78) protrude in the left-right direction from tip portions (66 c, 82 c) near the insertion opening (66, 82). When the plug (12, 76) is engaged with the socket (14, 78), the protruding pieces (32, 80) are in contact with the base portions (66, 82) of the protruding strips (66, 82) and elastically deformed, and play in the engagement between the plug (14, 78) and the socket (14, 78) can be suppressed.

Description

buckle

technical field

The present invention relates to a buckle capable of connecting and disconnecting various parts such as a belt or a webbing.

Background technique

Conventionally, as a buckle for detachably connecting two connection objects, there is a buckle disclosed in Patent Document 1, for example. The buckle includes a buckle main body and an insertion body, and the buckle main body has a receiving space for the insertion body to be inserted and engaged. A protrusion protruding toward an insertion opening into which the buckle main body is inserted is provided in the accommodation space. The insertion body is provided with a pair of operation levers which are inserted into the accommodation space of the buckle main body for engagement, and a pair of protruding pieces sandwiching the protruding part are provided between the pair of operation levers. According to this buckle, when inserting the insert body into the buckle main body, since the protruding piece is along both sides of the protruding part, the guiding performance of the inserting action is good, and the rattling during insertion can be eliminated. Stablize.

The buckle disclosed in Patent Document 2 includes a plug and a receptacle. In the receptacle, a triangular pressing member protruding toward the insertion port is provided in a housing space into which the plug is inserted and engaged. The pressing member expands and contracts toward the insertion port. installed with coil springs. The plug is provided with a pair of legs inserted into and engaged with the housing space of the socket, and a pair of protruding pieces are provided between the pair of legs. The top ends of the pair of protruding pieces are open so as to gradually move away from each other toward the outside, and when the plug and the socket are engaged, the top ends of the pressing member of the socket are biased between the pair of protruding pieces so as to be held elastically. approach. According to this buckle, when the plug is engaged with the socket, the pressing member elastically abuts against it, so that it is stable without rattling.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2000-125910

Patent Document 2: US Patent No. 5,845,376

Contents of the invention

In any of the aforementioned background arts, the buckle is integrally molded from resin, and the resin shrinks slightly after molding. The shrinkage rate of this shrinkage is slightly different due to material changes caused by changes in the color of the resin of the buckle, etc. In particular, in the case of the socket of the buckle, it shrinks as a whole and the thicker part shrinks more, Therefore, it is difficult to accurately predict the deformation caused by shrinkage in the design stage. Furthermore, the dimensional error between the plug and the socket has a great influence on the vibration and operability during engagement, so it is necessary to minimize the dimensional error due to the shrinkage, and the mold for the socket with the shrinkage is estimated to be Manufacturing is difficult to do with one design.

In order to eliminate rattling when the plug is engaged with the socket, the buckle in Patent Document 1 elastically abuts a part of the legs of the plug against the side wall of the socket and clamps the protruding part inside the socket between a pair of tabs of the plug. Hold to eliminate shaking. However, when the molding material or conditions are changed as described above, it is difficult to predict how the amount of shrinkage will change, so a large number of trial productions are required every time the molding material or conditions are changed, and the design and manufacture of molds and even the mass production of products require Lots of man hours. In addition, in order to keep within the dimensional tolerance, it is necessary to process the molded buckle.

In the buckle of Patent Document 2, since the pressing member is biased by the coil spring, even if the contraction amount changes, it can be stabilized without rattling. However, a coil spring or a pressing member is required, resulting in a large number of parts, a complicated structure, many assembly steps, and high cost.

The present invention has been made in view of the background art described above, and an object of the present invention is to provide a buckle that is easy to design and manufacture, and can suppress rattling when a plug and a receptacle are engaged, thereby enabling stable engagement.

The present invention provides a buckle capable of connecting and disconnecting parts to each other. The receptacle is formed with a protrusion pressed against the pair of protrusions so as to protrude toward the plug. The pair of protruding pieces are arranged side by side in a left-right direction intersecting with an insertion direction of the plug. A base portion of the protruding ridge on a side opposite to the insertion opening of the socket is formed so as to protrude in the left-right direction compared with a top end portion closer to the insertion opening. In a state where the plug is engaged with the receptacle, the protruding piece elastically deforms in contact with the base of the protruding ridge, and becomes an engaged state in which rattling in the left-right direction is suppressed. The pair of protrusions and the protrusion may be such that the protrusion is formed on the plug and the pair of protrusions are formed on the socket.

The protrusion is inserted between the pair of protrusions, and the base protrudes in the left and right directions on the outer surfaces of the pair of left and right sides of the protrusion, and is thicker than the inner side of the pair of protrusions. If the interval is thick, the pair of protruding pieces abut against the base to elastically deform and press against the base.

A pair of the protruding lines are installed along the outer sides of the pair of protruding pieces in the left-right direction, and the base portion protrudes in the left-right direction on the inner surfaces of the pair of left-right protruding pieces than the one of the protruding pieces. The width between the outer surfaces in the left-right direction of the pair of protruding pieces is narrow, and the pair of protruding pieces come into contact with the base to be elastically deformed and pressed against the base.

The distance between a pair of tabs becomes larger as the tips of the tabs are approached. Therefore, in the engaged state, the plug receives a force directed away from the socket, but the plug engages with the socket so that it cannot be separated, and engages so as to suppress movement in the front-back direction.

The upper surface portion and the lower surface portion of the socket are arranged facing each other with a predetermined interval therebetween, forming a fitting portion into which the plug is inserted, and the insertion portion for inserting the plug is provided at a certain depth. The port communicates with the linear guide groove along the insertion direction of the plug. When the plug is inserted into the receptacle, the protruding piece is securely fitted so that a part of the protruding piece fits into the guide groove of the upper surface portion and the guide groove of the lower surface portion. Enter along the direction of insertion. The protrusion is provided in the guide groove of the lower surface, and the protrusion may be connected to the upper surface, but is preferably in a shape that does not come into contact with the upper surface.

In the protruding line, a stepped portion in which the thickness of the protruding line changes is provided between the protruding line and the thinner tip portion on the protruding side than the base portion. The top end portion and the base portion are formed by a continuous tapered surface.

Invention effect

The buckle of the present invention can be efficiently designed and manufactured, and can suppress rattling of the plug and the receptacle during engagement, thereby enabling stable engagement. Furthermore, at the time of engagement, the plug is reliably guided in the insertion direction toward the socket by the protrusions of the plug and the protrusions of the socket, thereby enabling smooth engagement.

Description of drawings

Fig. 1 is a longitudinal sectional view showing a disengaged state of a buckle according to a first embodiment of the present invention.

Fig. 2 is a longitudinal sectional view showing an engaged state of the buckle according to the first embodiment of the present invention.

Fig. 3(a) is a front view showing an engaged state of the buckle according to the first embodiment of the present invention.

Fig. 3(b) is a right side view showing the engaged state of the buckle according to the first embodiment of the present invention.

Fig. 3(c) is a rear view showing an engaged state of the buckle according to the first embodiment of the present invention.

Fig. 4(a) is a plan view of the socket of the buckle according to the first embodiment of the present invention.

Fig. 4(b) is a front view of the socket with a buckle according to the first embodiment of the present invention.

Fig. 4(c) is a right side view of the buckle socket according to the first embodiment of the present invention.

Fig. 4(d) is a rear view of the buckle socket according to the first embodiment of the present invention.

Fig. 5 is a perspective view of a plug with a buckle according to the first embodiment of the present invention.

6 is a longitudinal sectional view showing a disengaged state of the buckle according to the second embodiment of the present invention.

7 is a longitudinal sectional view showing an engaged state of a buckle according to a second embodiment of the present invention.

Fig. 8(a) is a plan view of the socket of the buckle according to the second embodiment of the present invention.

Fig. 8(b) is a front view of a socket with a buckle according to a second embodiment of the present invention.

Fig. 8(c) is a right side view of a socket with a buckle according to a second embodiment of the present invention.

Fig. 8(d) is a rear view of a socket with a buckle according to a second embodiment of the present invention.

Explanation of reference signs

10, 74 Buckle

12, 76 plug

14, 78 sockets

20 legs

22 Engagement protrusion

24, 42 Ribbon piercing part

30 bridge

32, 80 tabs

34 1st shot

36 2nd shot

40 Fitting part

40a Insertion port

44 connecting rod

46 upper surface

48 lower surface

58, 64 guide groove

66, 82 protruding strips

66a, 82a steps

66b, 82b base

66c, 82c top end

Detailed ways

Embodiments of the present invention will be described below based on the drawings. 1 to 5 show a first embodiment of the present invention. A buckle 10 of this embodiment includes a plug 12 and a receptacle 14 engaged with the plug 12, and they are attached to each other to be connected and released arbitrarily. Parts such as belts or ribbons that are connected. In the following description, the extending direction of a pair of legs 20 described later of the plug 12 is referred to as the front-rear direction, and the direction perpendicular to the front-rear direction and in which the pair of legs 20 face each other is referred to as the left-right direction. The direction perpendicular to the front and rear directions is called the front and back direction or the thickness direction.

The plug 12 is formed integrally with a synthetic resin such as acetal, polyamide, or polypropylene, for example. As shown in FIG. 5 , the plug 12 includes: a belt pass-through 24, which is a base for mounting belts or belts and the like; a pair of legs 20, which extend away from the belt pass-through 24; and The engagement protrusion 22 is integrally provided at a position close to the tip end 20a of the leg portion 20 .

The direction in which the pair of leg parts 20 extend from the base end part 20b continuous with the webbing through part 24 toward the top end part 20a is parallel to each other and has the same length as each other. In each leg part 20, the intermediate part 20c located in the approximate middle of the front-end|tip part 20a and the base end part 20b bends and bulges to the outer side of the left-right direction so that it may mutually separate. The outer surfaces of the pair of leg portions 20 that do not face each other serve as the operation portion 19 having a shape that bulges outward. The opposing inner surfaces of the pair of leg portions 20 are also separated from each other so as to bend outward in the vicinity of the intermediate portion 20c. At the center of each leg portion 20, a slit 21 penetrating in the front-back direction is provided. The slit 21 passes through the center of the leg portion 20 and is formed in a thin curved shape along the extending direction of the leg portion 20 to facilitate elastic deformation of the leg portion 20 .

The engagement protrusions 22 are respectively provided in such a manner as to protrude to both sides in the front and rear directions of the position close to the top end portion 20a of the leg portion 20, and the engagement protrusions 22 are formed so as to be able to be accommodated with the locked portion 50 or the socket 14 described later. The concave portion 62 is engaged.

The base end portion 20b of the pair of leg portions 20 is integrally provided with one bridge portion 30 in the shape of a linear bar, and the bridge portion 30 connects the pair of leg portions 20 . The bridging portion 30 is formed to be long in the left-right direction, and a pair of protruding pieces 32 protruding parallel to the protruding direction of the leg portion 20 are provided on the inner surface 30 a continuous with the pair of leg portions 20 . The protruding piece 32 has a linear rod shape protruding along the leg portion 20 , and a cross-sectional shape intersecting the protruding direction is a rectangle long in the front-back direction. Of the side surfaces in the left-right direction of the pair of protruding pieces 32 , the side surfaces on the opposite side are slightly inclined so as to move away from each other as they get closer to the top ends of the protruding pieces 32 . Taper surfaces 32 a that are separated from each other as the tip approaches the tip are formed at tip end portions of the side surfaces facing each other of the protruding piece 32 . In addition, it is preferable that a pair of protruding pieces 32 have the same shape which is line-symmetric to each other, but it does not necessarily need to be line-symmetric, and may be an asymmetric shape.

The ribbon passing portion 24 is provided with: a first rod 34 formed parallel to the bridging portion 30 and long in the left-right direction; side, parallel to the first rod 34. Both ends of the first rod 34 and the second rod 36 are connected to each other by side parts 38 . A ribbon insertion hole 24 a is formed between the first rod 34 and the second rod 36 . A space is also provided in the portion surrounded by the first rod 34 and the bridge portion 30, and a belt insertion hole 24b is formed.

Next, the thickness in the front-back direction of each part of the plug 12 will be described. The thickness in the front-back direction of the leg portion 20 is formed thinner than the side portion 38 of the belt piercing portion 24 , and the bridging portion 30 is formed in substantially the same thickness in the front-back direction as the leg portion 20 . The portion of the tip portion 20 a of the leg portion 20 slightly away from the engagement protrusion 22 is thinner than the peripheral portion thereof. The protruding surface of the engaging protrusion 22 is relatively flat and has the same thickness as other parts of the leg portion 20 . The protruding piece 32 is formed thicker than the leg part 20, and protrudes from the leg part 20 in the front-back direction when viewed from the left-right direction.

Next, the socket 14 will be described. The socket 14 is also integrally formed using synthetic resin such as polyacetal, polyamide, or polypropylene, for example. The socket 14 includes: a fitting portion 40 into which the leg portion 20 of the plug 12 is inserted; and a belt passing portion 42 used for installing a belt or a belt or the like. The belt passing portion 42 is provided with a belt insertion hole 42a for inserting the belt member, etc., and a connecting rod 44 connecting the belt member, etc. A pair of longer side parts 45 are connected.

On the side opposite to the connecting rod 44 of the side surface portion 45 , the upper surface portion 46 and the lower surface portion 48 are arranged facing each other in the front-to-back direction with a predetermined interval therebetween, and form the fitting portion 40 into which the plug 12 is inserted. . The upper surface portion 46 is a drum-shaped plate body, which becomes slightly thinner as it moves away from the side surface portion 45 in the front-rear direction, and gradually becomes larger in width when approaching the end portion on the opposite side of the strip-through portion 42, becoming It is the same as the width between the pair of side parts 45 . The lower surface portion 48 is a plate having substantially the same shape as the upper surface portion 46 , and the locked portion 50 is provided by cutting the corners of the peripheral edge of the belt insertion hole 42 a into rectangles.

The upper surface portion 46 and the lower surface portion 48 face each other with a predetermined interval therebetween, and a side surface portion 52 connecting the upper surface portion 46 and the lower surface portion 48 is provided at an end portion opposite to the belt passing portion 42 . A pair of side parts 52 are provided in the left-right direction and have a predetermined length in the front-back direction. The opposite side of the accommodation space 40b to the ribbon passing portion 42 serves as an insertion opening 40a into which the plug 12 is inserted, surrounded by a pair of side surfaces 52 , and an upper surface portion 46 and a lower surface portion 48 . The side part 52 has a predetermined length from the insertion port 40a, and a slit 56 is opened between the side part 52 and the side part 45 .

The respective outer surfaces of the upper surface portion 46 and the lower surface portion 48 are formed flat. On the inner surfaces facing each other of the upper surface part 46, as shown in FIG. The guide groove 58 is formed so as to pass through the center of the upper surface portion 46 in the left-right direction, one end reaches the insertion port 40a, and the other end reaches the belt passing portion slightly closer to the center of the upper surface portion 46 in the front-rear direction. 42 positions. When the plug 12 is engaged with the receptacle 14, the front-back end of the protruding piece 32 of the plug 12 is inserted into the guide groove 58, and the guide groove 58 guides the plug 12 in the insertion direction, that is, the front-back direction.

A pair of guide protrusions 60 are provided in the left-right direction on the side edge portion of the slit 56 close to the belt-through portion 42 . Regarding the guide protrusion 60, as shown in FIG. 60 is formed with a guide surface 60a toward the center of the upper surface portion 46 as it goes from the insertion opening 40a toward the belt through portion 42 , and an inner wall surface 60b facing the belt through portion 42 in the left-right direction. The space on the inner wall surface 60 b on the side of the belt passing portion 42 serves as a receiving recess 62 for receiving the engagement protrusion 22 of the leg portion 20 . The accommodating recess 62 accommodates the engaging protrusion 22 of the plug 12 when the plug 12 is engaged with the receptacle 14 , and a part of the engaging protrusion 22 faces the inner wall surface 60 b and cannot be pulled out. The opposing guide surfaces 60 a of the pair of guide protrusions 60 elastically deform the legs 20 , and the pair of legs 20 inserted into the insertion opening 40 a elastically deforms so as to approach each other along the guide protrusions 60 as the insertion amount increases. Then, the elastic deformation returns to the receiving recess 62 , and the engaging protrusion 22 is inserted into the receiving recess 62 and cannot be pulled out. In addition, the receiving recessed portion 62 is located at a position facing the locked portion 50 of the lower surface portion 48 , and has substantially the same shape as the locked portion 50 . In a portion of the guide protrusion 60 that is continuous with the side edge portion of the slit 56 , a notch portion 63 into which a thicker portion near the lower end of the operation portion 19 of the leg portion 20 fits is formed.

On the inner surface of the lower surface portion 48 , a guide groove 64 is provided with a constant depth similarly to the guide groove 58 of the upper surface portion 46 . The guide groove 64 is formed so as to pass through the center of the lower surface portion 48 in the left-right direction, one end reaches the insertion opening 40 a, and the other end reaches the vicinity of the locked portion 50 . When the plug 12 is engaged with the receptacle 14 , the front-back end of the protruding piece 32 of the plug 12 is inserted into the guide groove 64 , and the guide groove 64 guides the plug 12 in the insertion direction, that is, in the front-rear direction.

A protrusion 66 is formed at the center of the guide groove 64 . The protrusion 66 has a plate shape that is long in the front-rear direction and has a small width in the left-right direction. One end in the front-rear direction reaches the locked portion 50 , and the other end reaches the vicinity of the insertion port 40 a. In the front-back direction, it protrudes from the bottom of the guide groove 64 toward the upper surface portion 46 and approaches the upper surface portion 46 with a gap therebetween. The width of the protrusion 66 in the left-right direction gradually becomes thinner as it approaches the insertion opening 40a. On a pair of left and right outer surfaces of the protrusion 66 , a stepped portion 66 a having a wider width along the left-right direction is provided at a position slightly closer to the locked portion 50 than the center in the front-back direction. The portion closer to the locked portion 50 than the stepped portion 66a is the base portion 66b, and the portion closer to the insertion opening 40a than the stepped portion 66a is the tip portion 66c, which is thinner than the base portion 66b. The stepped portion 66a is formed of a continuous tapered surface from a wide base portion 66b to a narrow top end portion 66c, and the base portion 66b and the top end portion 66c become slightly thinner in the left and right directions as they approach the insertion port 40a. The protrusion 66 is inserted between the pair of protrusions 32 of the plug 12 , the tip 66 c is formed thinner than the distance between the pair of protrusions 32 , and the base 66 b is formed slightly thicker than the distance between the pair of protrusions 32 . In addition, the front end portion 66c preferably narrows in the left-right direction as it gets closer to the insertion port, but may have the same thickness as long as it is narrower than the width between the pair of protruding pieces 32 .

A pair of guide protrusions 68 are provided in the left-right direction at the side edge portion of the slit 56 of the lower surface portion 48 close to the ribbon passing portion 42 . The shape of the guide protrusion 68 viewed from the front and back as shown in FIG. The end portion of 40a is formed in a triangular shape, and the guide protrusion 68 is formed with: a guide surface 68a that goes toward the center of the lower surface portion 48 as it goes from the insertion port 40a toward the belt through portion 42 , and a guide surface 68a facing the belt through portion 42 . And the inner wall surface 68b located in the left-right direction. The inner wall surface 68b coincides with the edge portion of the locked portion 50, and when the engaging protrusion 22 of the leg portion 20 is accommodated in the locked portion 50 when the plug 12 is engaged with the socket 14, the inner wall surface 68b is aligned with the locked portion 50. The engaging protrusions 22 face each other. The mutually opposing guide surfaces 68 a of the pair of guide protrusions 68 elastically deform the leg portion 20 similarly to the guide surface 60 a of the guide protrusion 60 . Then, the elastic deformation is restored at the locked portion 50 , and the engaging protrusion 22 is inserted into the locked portion 50 and cannot be pulled out. In a portion of the guide protrusion 68 that is continuous with the side edge portion of the slit 56 , a notch portion 63 for fitting a thicker portion near the lower end of the operation portion 19 of the leg portion 20 is formed.

Next, the engaging operation and usage method of the buckle 10 of this embodiment will be described below. First, a method of attaching the belt members 70 and 72 to the plug 12 of the buckle 10 will be briefly described. The first rod 34 and the second rod 36 are provided at the ribbon passing portion 24 of the plug 12, and the ribbon member 70 for connection is inserted into the ribbon insertion hole 24b from the back side of the plug 12, and passes through the first rod. 34, is inserted into the ribbon insertion hole 24a from the front side to the back side of the ribbon insertion hole 24a, overlaps with its own ribbon member, and is pulled out in a freely adjustable length. On the other hand, the belt member 72 attached to the socket 14 is connected to one connecting rod 44 in an unadjustable manner.

Regarding the engaging operation of the plug 12 and the socket 14 , the leg portion 20 of the plug 12 faces the insertion opening 40 a of the socket 14 , and the plug 12 is pushed into the socket 14 . When the leg portion 20 is inserted into the receiving space 40b, it is surrounded by the guide protrusions 60, 68 up and down, left and right, and as the plug 12 is inserted, the left-right distance between the guide surfaces 60a, 68a becomes narrower, so the leg portion 20 approaches each other. Elastic deformation occurs. Then, when the engagement protrusion 22 of the leg portion 20 reaches the receiving recess 62 of the upper surface portion 46 or the locked portion 50 of the lower surface portion 48, the elastic deformation recovers, and the engagement protrusion 22 of the leg portion 20 and the receiving recess 62 or are locked The locking part 50 is fitted. The engagement protrusion 22 abuts against the inner wall surface 60b and the inner wall surface 68b of the guide protrusions 60, 68, and cannot be pulled out and engaged. The plug 12 and the socket 14 are reliably connected, and become the engaged state shown in FIGS. 2 and 3 .

At this time, the pair of protrusions 32 of the plug 12 are along the left and right outer sides of the protrusion 66 of the socket 14, and the protrusion 66 is inserted between the pair of protrusions 32. When the plug 12 is inserted, the pair of protrusions The sheet 32 is guided along the insertion direction. Since the tapered surface 32a of the protruding piece 32 is formed so as to open toward the insertion port 40a side, the protrusion 66 is reliably inserted inside. The protruding piece 32 securely enters along the insertion direction so that a part of the protruding piece 32 fits into the guide groove 58 of the upper surface portion 46 and the guide groove 64 of the lower surface portion 48 . Since the tip portion 66c of the protrusion 66 is formed thinner than the distance between the pair of protrusions 32, the protrusions 32 enter without being elastically deformed, and since the base portion 66b is formed thicker than the distance between the pair of protrusions 32, there When the tip of the protruding piece 32 reaches the stepped portion 66a of the protrusion 66, the protruding piece 32 is pressed by the stepped portion 66a, elastically deformed and widened, and enters while being pressed against the base portion 66b. In the engaged state, the protruding piece 32 is pressed against the base portion 66b, and engages without rattling in the left-right direction. The opposite sides of the pair of protruding pieces 32 are slightly inclined so as to move away from each other as they get closer to the top ends of the protruding pieces 32. Therefore, in the engaged state, the plug 12 receives a little force in a direction away from the socket 14. The engaging protrusion 22 of the plug 12 engages with the locked portion 50 and the receiving recessed portion 62 of the socket 14 so as not to be separated, and engages so as to suppress movement in the front-back direction. In addition, the operation portion 19 of the plug 12 protrudes outward from the slit 56 of the socket 14 , and is partly accommodated in the cutout portion 63 of the guide protrusions 60 , 68 .

In order to release the connection between the plug 12 and the receptacle 14, a pair of operating parts 19 are pressed in from the outside, so that the legs 20 of the plug 12 are elastically deformed until the engaging protrusion 22 is not in contact with the guide protrusions 60, 68 of the receptacle 14. The position where the wall surfaces 60b, 68b face each other. In this state, when the plug 12 and the receptacle 14 are relatively moved slightly in directions away from each other, the engagement is easily released.

According to the buckle 10 of the present embodiment, when the plug 12 is engaged with the receptacle 14 , the leg portion 20 of the plug 12 is guided along the insertion direction and enters reliably, enabling smooth engagement. During engagement, the protruding piece 32 of the plug 12 is pressed against the base portion 66b of the protrusion 66 of the socket 14, so there is no rattle and the engagement is stable. The plug 12 and the receptacle 14 are molded integrally with resin. Even if the resin shrinks after molding, the base portion 66b of the protruding strip 66 can be easily set to a size that is estimated to have a shrinkage error. Since the protruding piece 32 elastically deforms and is pressed against The base portion 66b of the protruding strip 66 does not shake. Therefore, the dimensional tolerance of the shape of the plug 12 and the socket 14 can be set relatively large, and when changing the molding material or conditions, it is not necessary to conduct a large number of experiments to test how the shrinkage changes, and no design or trial production is required, and no processing is required. working hours, high efficiency. Since shaking can be suppressed by the elastic deformation of the protruding piece 32, the dimensional tolerance on the side of the socket 14 can be made larger, thereby facilitating design and manufacture. Moreover, the structure is simple, and parts such as springs will not be added. During engagement, the protruding piece 32 of the plug 12 is reliably aligned in the insertion direction so that a part of the protruding piece 32 fits into the guide groove 58 of the upper surface portion 46 and the guide groove 64 of the lower surface portion 48 of the receptacle 14 . Enter, can reach the engagement position smoothly. The overall structure is simple, compact and easy to use. In the socket 14 of the present embodiment, the ridges 66 do not reach the upper surface portion 46, so even if the resin of the molding material shrinks, the upper surface portion 46 has no sink marks, and the surface can be made smoother. In addition, although it is more preferable that the protrusion 66 does not reach the upper surface part 46, the protrusion 66 may be the shape which reaches the upper surface part 46 and is connected thereto.

Next, a second embodiment of the present invention will be described based on FIGS. 6 to 8 . In addition, here, the same code|symbol is attached|subjected to the same member as the above-mentioned embodiment, and description is abbreviate|omitted. The buckle 74 of this embodiment includes a plug 76 and a socket 78 .

The pair of leg portions 20 of the plug 76 are provided integrally with a straight bar-shaped bridging portion 30 similarly to the above-mentioned embodiment, and on the inner surface 30a of the bridging portion 30 intersecting with the protruding direction of the pair of leg portions 20, a There is a pair of tabs 80 protruding toward the protruding direction of the legs 20 . The protruding piece 80 is a linear rod shape protruding along the extending direction of the leg portion 20, and the cross-sectional shape intersecting the protruding direction is a rectangle long in the front and back directions, and the width in the left-right direction is smaller than that of the protruding piece of the buckle 10 of the above-mentioned embodiment. 32 fine. The opposing side surfaces of the pair of protruding pieces 80 are slightly inclined so as to get away from each other as they approach the top ends of the protruding pieces 80 , and the distance between the pair of protruding pieces 82 is narrower than the distance between the protruding pieces 32 of the buckle 10 of the above embodiment. In addition, a pair of protruding piece 80 has the same shape mutually line-symmetric, but does not necessarily need to be line-symmetric, and may be an asymmetric shape. The protruding piece 80 is formed thicker than the leg part 20 in the front-back direction, and protrudes from the leg part 20 in the front-back direction when viewed from the left-right direction.

A guide groove 58 is provided at a certain depth on the inner surface of the upper surface portion 46 of the socket 78 . A pair of guide protrusions 60 are provided in the left-right direction on the side edge portion of the slit 56 close to the belt-through portion 42 . Like the guide groove 58 of the upper surface portion 46 , a guide groove 64 is provided at a constant depth on the inner surface of the lower surface portion 48 .

Protrusions 82 are respectively formed at positions adjacent to the left and right of the guide groove 64 . The protrusion 82 is a plate shape long in the front-rear direction and small in width in the left-right direction, and is formed along the side edge of the guide groove 64. One end in the front-rear direction reaches the locked portion 50, and the other end reaches the locked portion 50. near the insertion port 40a. Preferably, it is continuous with the inner surface of the lower surface portion 48 and the inner surface of the upper surface portion 46 in the front-back direction, and separates the inner space of the upper surface portion 46 and the lower surface portion 48 . The width of the protrusions 82 in the left-right direction gradually becomes thinner as the insertion opening 40a is approached, and the distance between the protrusions 82 gradually increases as the insertion opening 40a approaches, and is far away from the guide groove 64 in the vicinity of the insertion opening 40a.

On the opposing surfaces of the pair of protrusions 82 , a step portion 82 a having a variable width is provided so as to protrude in the left-right direction at a position slightly closer to the engaged portion 50 than the center in the front-rear direction. The portion closer to the locked portion 50 than the stepped portion 82a is the base portion 82b, and the portion closer to the insertion port 40a than the stepped portion 82a is the tip portion 82c, and the distance between the tip portions 82c is larger than that of the base portion 82b. The step portion 82a is formed of a continuous tapered surface from a tip portion 82c having a large distance between them to a base portion 82b having a narrow width. Preferably, the base portion 82b and the tip portion 82c are slightly inclined so as to be separated from each other as they approach the insertion port 40a. The outer surfaces of the pair of protrusions 82 that do not face each other are parallel to each other. In addition, the protrusions 82 are attached along the outer sides of the pair of protruding pieces 80 of the plug 76, the distance between the tip parts 82c is formed larger than the distance between the outer surfaces of the pair of protruding pieces 80, and the distance between the base parts 82b is formed larger than that of the outer surfaces of the pair of protruding pieces 80. The distance between the outer surfaces of the pair of protrusions 80 is slightly narrower.

Next, the engaging operation of the plug 76 and the receptacle 78 of the buckle 74 of the present embodiment will be described below. The plug 76 is pressed into the socket 78 so that the leg part 20 of the plug 76 faces the insertion opening 40 a of the socket 78 . When the leg part 20 is inserted into the accommodation space 40b, it is surrounded by the guide protrusion 60, 68 up and down, left and right, and elastically deforms so that the leg part 20 may approach mutually. Then, when the engagement protrusion 22 of the leg portion 20 reaches the receiving recess 62 of the upper surface portion 46 or the locked portion 50 of the lower surface portion 48, the elastic deformation recovers, and the engagement protrusion 22 of the leg portion 20 and the receiving recess 62 or are locked The locking portion 50 is fitted to be in the engaged state shown in FIG. 7 .

At this time, the pair of protrusions 80 of the plug 76 are inserted between the pair of protrusions 82 of the receptacle 78 , and the pair of protrusions 80 are guided along the insertion direction when the plug 76 is inserted. The protruding piece 80 securely enters along the insertion direction so that a part of the protruding piece 80 fits into the guide groove 58 of the upper surface portion 46 and the guide groove 64 of the lower surface portion 48 . The distance between the tip portion 82c of the protrusion 82 is formed larger than that of the pair of protrusions 80, so that the protrusion 80 enters without elastic deformation, and the base portion 82b is formed narrower than the pair of protrusions 80, so that the distance between the protrusions 80 When the tip reaches the step portion 82a of the protruding bar 82, the protruding piece 80 is pressed by the step portion 82a, elastically deformed and thinned, and enters while being pressed against the base portion 82b. In the engaged state, the protruding piece 80 is pressed against the base portion 82b, and engages without rattling in the left-right direction. Since the distance between the pair of protrusions 82 becomes larger as the top of the protrusions 82 approaches, the plug 76 bears a force in a direction away from the receptacle 78 in the engaged state. The locked portion 50 of the socket 78 engages with the receiving recessed portion 62 so as not to be separated, and engages so as to suppress movement in the front-back direction.

According to the buckle 74 of this embodiment, it has the same effect as the above-mentioned embodiment, and can suppress the rattling of the plug 76 and the receptacle 78 at the time of engagement, and can engage stably. In addition, at the time of engagement, the plug 76 is guided along the insertion direction toward the socket 78, and engagement can be performed smoothly.

In addition, the buckle of this invention is not limited to the said embodiment, The shape of a protruding piece and a protrusion can be changed freely as long as it is a shape which can be pressed reliably. The shape of the legs of the plug may be any shape that can be reliably engaged with the socket and can be easily attached and detached. The item to which the buckle is installed can be any item such as a bag, clothing or winter gear.

Claims (6)

1. A buckle capable of interconnecting and uncoupling each part, comprising a plug (12, 76) and a socket (14, 78), the buckle (10, 74) being characterized in that: One part of the plug (12, 76) and the socket (14, 78) is formed with a pair of elastically deformable protrusions (32, 80) protruding toward the other part. The member is formed with protrusions (66, 82) pressed against the pair of protrusions (32, 80) so as to protrude toward the one member, The pair of protruding pieces (32, 80) are arranged side by side in a left-right direction intersecting with an insertion direction of the plug (12, 76), In the state where the plug (12, 76) is engaged with the socket (14, 78), the protrusion (32, 80) and the base (66b, 82b) of the protrusion (66, 82) elastically deformed by abutting against each other, and becomes an engaged state in which rattling is suppressed. 2. The buckle according to claim 1, characterized in that: The protrusions (66) are inserted between the pair of protrusions (32), and the bases (66b) protrude in the left and right directions on the left and right outer sides of the protrusions (66) and become thicker. , and is thicker than the inner interval of the pair of protruding pieces (32), the pair of protruding pieces (32) abut against the base (66b) to elastically deform and press against the base (66b). 3. The buckle according to claim 1, characterized in that: A pair of the protrusions (82) are installed along the outer sides of the pair of protrusions (80) in the left-right direction, and on the inner surfaces of the pair of left and right sides of the protrusions (82), the base (82b) protrudes in the left-right direction and is narrower than the width between the outer surfaces in the left-right direction of the pair of protrusions (80), and the pair of protrusions (80) contacts the base (82b) to generate Elastically deformed and pressed against the base (82b). 4. The buckle according to claim 1, characterized in that: The distance between a pair of the protruding pieces (32) becomes larger as the top ends of the protruding pieces (32) are approached. 5. The buckle according to claim 1, characterized in that: The upper surface portion (46) and the lower surface portion (48) of the socket (14) are arranged opposite to each other with a predetermined distance therebetween, forming a fitting portion (40) into which the plug (12) is inserted, so that A certain depth is provided with linear guide grooves (58, 64) communicating with the insertion port (40a) for the insertion of the plug (12) and along the insertion direction of the plug (12), When the plug (12) is inserted into the socket (14), the protruding piece (32) is connected with the guide groove (58) of the upper surface part (46) by a part of the protruding piece (32) Fitted with the guide groove (64) of the lower surface portion (48), it is reliably guided along the insertion direction and enters, The protrusion (66) is provided in the guide groove (64) of the lower surface portion (48), and the protrusion (66) has a shape that does not reach the upper surface portion (46). 6. The buckle of claim 1, wherein: In the protrusion (66, 82), between the front base (66b, 82b) and the thinner tip (66c, 82c) on the protruding side than the front base (66b, 82b) A step portion (66a, 82a) in which the thickness of the protrusions (66, 82) changes is provided between them, and the step portion (66a, 82a) is combined with the top end portion (66c, 82c) and the base portion ( 66b, 82b) Continuous tapered surfaces are formed.

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