CN111683558B

CN111683558B - Belt buckle

Info

Publication number: CN111683558B
Application number: CN201880088315.2A
Authority: CN
Inventors: 伊藤直幸; 金子仁
Original assignee: YKK Corp
Current assignee: YKK Corp
Priority date: 2018-03-26
Filing date: 2018-03-26
Publication date: 2022-05-31
Anticipated expiration: 2038-03-26
Also published as: CN111683558A; TWI659704B; TW201940097A; CN113508965B; CN113508965A; WO2019186665A1

Abstract

Provided is a buckle with improved freedom of attachment/detachment operation. The buckle comprises a male member and a female member, wherein the male member has a protrusion, the female member has a recess capable of engaging with the male member, the female member has an inclined surface for connecting the surface of the second plate-like base and the recess and guiding the protrusion to the recess, the protrusion has a claw portion, the recess has a claw receiving portion capable of engaging with the claw portion, the contour of the claw receiving portion when the female member is viewed from the front surface side is polygonal or curved, and is projected toward the opposite side of the second belt mounting portion, a magnet is embedded in one of the protrusion and the recess, and a magnet oriented to attract the magnet or a metal attracted to the magnet is embedded in the other.

Description

Belt buckle

Technical Field

The present invention relates to a buckle using a magnet.

Background

Conventionally, in order to connect end portions of belts attached to various articles such as bags, backpacks, clothes, shoes, helmets, sporting goods, and packaging tools to each other in addition to the waist belt, a buckle has been used in which a male member and a female member are detachably engaged with each other. In such a buckle, on the one hand, it is required to be easy to operate for attachment and detachment, and on the other hand, it is required to avoid accidental detachment in an unintended case. In order to satisfy such required characteristics, various buckle structures have been proposed.

Japanese unexamined patent publication No. 62-119815 (patent document 1) discloses a buckle including a 1 st coupling member and a 2 nd coupling member that is engageable with and disengageable from the 1 st coupling member, wherein a belt attachment portion is provided at the rear ends of the 1 st coupling member and the 2 nd coupling member, wherein the 1 st coupling member and the 2 nd coupling member have opposing surfaces that overlap each other, the opposing surfaces are formed to be magnetically attracted, and an engagement mechanism for preventing the 1 st coupling member and the 2 nd coupling member from sliding in a direction in which the coupling members are separated from each other due to pulling of the belt is provided on the opposing surfaces. This document describes, as an engaging mechanism, a locking hole formed in one of the opposing surfaces and a locking projection inserted into the locking hole.

Buckle structures similar to the above buckle structure are also described in U.S. patent No. 7,506,419 (patent document 2), chinese utility model No. 205795061 (patent document 3), and chinese utility model No. 205214395 (patent document 4).

Documents of the prior art

Patent document

Patent document 1: japanese Kokai publication Sho-62-119815

Patent document 2: specification of U.S. Pat. No. 7,506,419

Patent document 3: chinese utility model No. 205795061 specification

Patent document 4: chinese utility model No. 205214395 specification

Disclosure of Invention

However, in the conventional buckle structure, there is no degree of freedom in the operation for engaging and disengaging the male member with and from the female member, and it is necessary to relatively operate both the male member and the female member by a predetermined set of method. Therefore, the accuracy of the operation of attaching and detaching the buckle is required, and the user needs to exert much effort in the operation of attaching and detaching the buckle. While various demands are expected for buckles depending on the applications, buckles have not been developed in the past which focus on facilitating the attachment and detachment operations.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a buckle in which the degree of freedom of the attaching and detaching operation is improved.

The present inventors have made intensive studies to solve the above problems, and as a result, have created the following exemplary invention in which the characteristics of the magnet are utilized favorably.

[1] A buckle comprises a male member and a female member engageable with the male member,

the male member includes: a first plate-like base having a front surface and a back surface; a protrusion portion protruding from the back surface of the first plate-like base; and a first belt mounting portion provided extending from one end of the first plate-like base portion and having at least one opening extending in the belt width direction,

the female member includes: a second plate-like base having a front surface and a back surface; a recessed portion recessed in the surface of the second plate-like base portion and engageable with the protruding portion; a second belt mounting portion extending from one end of the second plate-like base portion and having at least one opening extending in a belt width direction; and an inclined surface connecting the surface of the second plate-like base and the recessed portion and guiding the protruding portion to the recessed portion,

the protrusion has a claw portion protruding at least toward the first tape mounting portion side,

the recessed portion has a claw receiving portion engageable with the claw portion,

the contour of the claw receiving portion when the female member is viewed from the front surface side is polygonal or curved and is convex toward the opposite side of the second belt mounting portion,

a magnet is embedded in one of the protrusion and the recess, and a magnet having a magnetic pole oriented so as to be attracted by the magnet or a metal attracted by the magnet is embedded in the other.

[2] In the buckle according to [1], an outline of the pawl receiving portion as viewed from a front surface side of the female member is substantially コ -shaped or substantially U-shaped with the second belt mounting portion side open.

[3] In the buckle according to [1] or [2], the male member is rotatable about the projection as a rotation axis while maintaining the engagement state in which the claw portion is engaged with the claw receiving portion.

[4] In the buckle according to [3], when a position where the male member is engaged with the female member so that the first strap attaching part and the second strap attaching part are positioned on opposite sides of each other is set as a central position, the male member can be turned within a limited angle range of 90 ° or less in both directions from the central position with a protruding direction of the protruding part as a rotation axis in an engaged state where the pawl part is engaged with the pawl receiving part.

[5] In the buckle according to any one of [1] to [4], a length of the recessed portion in the belt width direction viewed from the front surface side of the female member is gradually increased as approaching the second belt attaching portion, or is fixed to a middle portion of the second belt attaching portion and is further gradually increased as approaching the second belt attaching portion.

[6] The buckle according to any one of [1] to [5], wherein a maximum length of the recessed portion in a belt width direction when the female member is viewed from a front side is longer than a maximum length of the protruding portion in the belt width direction when the male member is viewed from a rear side by 2mm or more.

[7] The buckle according to any one of [1] to [6], wherein the recessed portion has a groove-shaped end portion that opens to the second strap attaching portion side.

[8] In the buckle according to any one of [1] to [7], the recessed portion has a first bottom surface disposed inside a region formed by a polygonal or curved contour of the pawl receiving portion when the female member is viewed from the front surface side and a straight line connecting both ends of the polygonal or curved line, and a slope that is connected to the first bottom surface and rises toward the second strap attaching portion.

[9] In the buckle according to item [8] of item [7], the recessed portion has a second bottom surface extending from an end portion of the slope on the second strap attaching portion side to the groove-shaped end portion.

[10] In the buckle according to any one of [1] to [9], the protrusion has a top surface and a slope connected to the top surface and descending toward the opposite side of the first strap attaching part.

[11] In the buckle according to any one of [1] to [10], the inclined surface is formed along a contour of the pawl receiving portion when the female member is viewed from a front surface side.

[12] The buckle according to any one of [1] to [11], wherein the length of the inclined surface is 0.5mm or more.

[13] The buckle according to any one of [1] to [12], wherein the protrusion has a claw portion protruding only toward the first strap attaching portion.

[14] An article having the buckle according to any one of [1] to [13 ].

Effects of the invention

According to one embodiment of the buckle of the present invention, the female member (150) has an inclined surface (180) that connects the surface (161) of the second plate-like base (160) and the recessed portion (170) and guides the protruding portion (120) to the recessed portion (170), and magnets are embedded in the protruding portion (120) and the recessed portion (170) so as to attract each other. Therefore, high-precision alignment is not required, and when a user approaches the protrusion (120) and the recess (170), the male member (100) and the female member (150) are easily and automatically engaged at an appropriate position. Therefore, the user does not need to exert much effort on the engagement operation of the buckle.

According to one embodiment of the buckle, the protrusion part (120) is provided with a claw part (126) protruding at least to the first belt mounting part (130), and the outline of the claw receiving part (176) seen when the female member (150) is seen from the surface (161) side is polygonal or curved and protrudes to the opposite side of the second belt mounting part (190). Therefore, the male member (100) is relatively rotated in a direction away from the surface of the second plate-shaped base (160) with the pawl receiving portion (176) as a fulcrum in a direction in which the back surface of the first plate-shaped base (110) is away from the surface of the second plate-shaped base (160) from a state in which the male member (100) is engaged with the female member (150), so that the operation of releasing the engagement in a manner of turning the male member (100) open can be realized. Conversely, the operation of engaging the male member (100) with the female member (150) can also be achieved by tilting the male member (100) relative to the female member (150) from a state in which the male member (100) is separated from the female member (150) and bringing the claw portion (126) into contact with the claw receiving portion (176), and rotating the male member (100) about the claw receiving portion (176) as a fulcrum in a direction in which the back surface of the first plate-shaped base portion (110) of the male member (100) approaches the surface of the second plate-shaped base portion (160) of the female member (150).

According to one embodiment of the buckle of the present invention, the male member is rotatable relative to the female member while maintaining the engagement state in which the claw portion of the male member is engaged with the claw receiving portion of the female member. In the conventional buckle structure, once engaged, the buckle is not movable, and therefore, an object may collide with the buckle and break. However, the rotation in the engaged state provides a special effect that the force is released even when an object collides in a severe environment such as a field, and thus the force is hardly broken.

As described above, according to the one embodiment of the buckle of the present invention, since the degree of freedom is provided in the relative manipulation manner of the male member and the female member required for engaging and disengaging the male member and the female member, the operation of attaching and detaching the buckle becomes easier. Therefore, since there is no need for excessive attention in the operation of the buckle, the user can easily perform the operation of attaching and detaching the buckle even during other operations such as walking or cycling.

Further, according to one embodiment of the buckle of the present invention, the male member and the female member are guided to a predetermined engagement position by magnetic force, and the effect that the engagement and disengagement are not easily caused unexpectedly is obtained. Therefore, according to one embodiment of the buckle of the present invention, it is possible to easily perform the operation of attaching and detaching the buckle while ensuring the basic buckle performance that the male member and the female member are not accidentally engaged and disengaged by using the magnetic force, for example.

Drawings

Fig. 1-1 is a perspective view of a male member of a buckle according to a first embodiment of the present invention, as viewed from the front side.

Fig. 1-2 are perspective views of a male member of a buckle according to a first embodiment of the present invention, as viewed from the back side.

Fig. 2-1 is a perspective view of the female member of the buckle according to the first embodiment of the present invention as viewed from the front surface side.

Fig. 2-2 is a perspective view of the female member of the buckle according to the first embodiment of the present invention as viewed from the back side.

Fig. 3 is a perspective view of the buckle according to the first embodiment of the present invention when the male member is engaged with the female member.

Fig. 4-1 shows an example of a state in the middle of engaging a male member and a female member of a buckle according to a first embodiment of the present invention, wherein fig. 4-1 (a) is a side view and fig. 4-1 (b) is a cross-sectional view showing an internal structure thereof.

Fig. 4-2 shows another example of a state in the middle of engaging the male member and the female member of the buckle according to the first embodiment of the present invention, wherein fig. 4-2 (a) is a side view and fig. 4-2 (b) is a cross-sectional view showing the internal structure thereof.

Fig. 5 is a perspective view of the male member (100) of the buckle according to the second embodiment of the present invention, as viewed from the back side.

Fig. 6 is a perspective view of a female member (150) of a buckle according to a second embodiment of the present invention, as viewed from the front surface side.

Fig. 7 is a perspective view of a female member of a buckle according to a third embodiment of the present invention as viewed from the front surface side.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments.

< 1. first embodiment >

Fig. 1-1 shows a perspective view of a male member (100) of a buckle (10) according to a first embodiment of the present invention, as viewed from a front surface (111) side. Fig. 1-2 show a perspective view of a male member (100) of a buckle (10) according to a first embodiment of the present invention, as viewed from the rear surface (112) side. Fig. 2-1 shows a perspective view of the female member (150) of the buckle (10) according to the first embodiment of the present invention, as viewed from the front surface (161) side. Fig. 2-2 show a perspective view of the female member (150) of the buckle (10) according to the first embodiment of the present invention, as viewed from the rear surface (162) side. Fig. 3 is a perspective view showing a state where the male member (100) of the buckle (10) according to the first embodiment of the present invention is engaged with the female member (150).

(1-1. integral Structure)

A male member (100) of a buckle (10) according to the present embodiment is provided with: a first plate-like base (110) having a front surface (111) and a back surface (112); a protrusion (120) that protrudes from the back surface (112) of the first plate-like base (110); and a first band attachment part (130) extending from one end of the first plate-like base part (110) and having at least one opening (131) extending in the band width direction.

A female member (150) of a buckle (10) according to the present embodiment is provided with: a second plate-like base (160) having a front surface (161) and a back surface (162); a recessed part (170) which is recessed on the surface (161) of the second plate-shaped base (160) and can be engaged with the protrusion part (120); a second belt mounting portion (190) extending from one end of the second plate-like base portion (160) and having at least one opening (191) extending in the belt width direction; and an inclined surface (180) that connects the surface (161) of the second plate-like base (160) and the recessed portion (170) and guides the protruding portion (120) to the recessed portion (170).

In the female member (150) of the buckle (10) according to the present embodiment, a magnet (128) is embedded in one of the protrusion (120) and the recess (170), and a magnet having its magnetic pole oriented so as to be attracted by the magnet or a metal (128) to be attracted by the magnet is embedded in the other. According to the buckle (10) of the present embodiment, a magnet embedded in the male member (100) or a metal (128) attracted by the magnet and a magnet embedded in the female member (150) or a metal (128) attracted by the magnet can be attracted to each other via the first bottom surface (172) of the recess (170) of the female member (150).

The material of the male member (100) and the female member (150) is not particularly limited, and for example, other than metal, synthetic resin such as Polyacetal (POM), nylon, polybutylene terephthalate (PBT) and the like may be used. The male member (100) and the female member (150) can be manufactured by injection molding, die casting, or the like.

In the present embodiment, the protrusion (120) of the male member (100) has a claw portion (126) that protrudes at least toward the first tape attaching portion (130). From the viewpoint of improving the freedom of movement of the male member (100), the pawl portion (126) preferably protrudes only toward the first tape attaching portion (130). On the other hand, an upright wall (129) that vertically descends from the top surface (122) toward the rear surface (112) is formed on the side portion of the protrusion (120) opposite to the first tape mounting portion (130).

The recessed part (170) of the female member (150) has a claw receiving part (176) that can be engaged with the claw part (126). The contour of the pawl receiving portion (176) when the female member (150) is viewed from the surface (161) side can be polygonal or curved so as to project toward the opposite side of the second strap attaching portion (190). In the present embodiment, the outline of the claw receiving portion (176) is polygonal, and is formed in a substantially コ shape by three line segments and two corner portions. The outline of the claw receiving portion (176) may be polygonal, which is formed by more corner portions and line segments than in the present embodiment.

The first belt mounting portion (130) has at least one opening (131) extending in the belt width direction, and preferably has two openings (131). The length of the strap can be adjusted by inserting the strap into the opening and winding the strap (not shown) around the first strap attaching part (130). The second belt mounting part (190) also has at least one opening (191), preferably two openings (191), extending in the belt width direction. The length of the strap can be adjusted by inserting the strap into the opening and winding the strap (not shown) around the second strap attaching part (190).

(1-2. inclined plane)

A female member (150) of a buckle (10) according to the present embodiment has an inclined surface (180) that connects a surface (161) of a second plate-like base (160) and a recessed portion (170) and guides a protrusion (120) to the recessed portion (170). When the protrusion (120) is brought close to the recess (170) and the two are engaged with each other, even if the position of the protrusion (120) is slightly shifted from the position of the recess (170), the protrusion (120) is guided to the recess (170) due to the presence of the inclined surface (180). Therefore, the degree of freedom of the operation of engaging the protrusion (120) with the recess (170) is improved.

For example, as shown in fig. 4-1, it can be understood that even if the position of the protrusion (120) of the male member (100) is slightly shifted and the claw portion (126) comes into contact with the inclined surface (180) of the female member (150), the male member (100) is guided to the recessed portion (170) while sliding on the inclined surface (180).

Preferably, the inclined surface (180) is formed along the contour of the pawl receiving portion (176) when the female member (150) is viewed from the surface (161) side. More preferably, the inclined surface (180) is formed along the entire contour of the pawl receiving portion (176) when the female member (150) is viewed from the surface (161) side. Thus, the area for guiding the protrusion (120) to the recess (170) is increased, and the degree of freedom of the operation for engaging the protrusion (120) with the recess (170) is further improved.

The inclined surface defined in the present invention is different from the chamfer in that it has a function of guiding the protrusion to the recess. Conventionally, although a chamfer is formed for improving the touch feeling, the chamfer is not intended for guiding the protrusion and does not have a function of guiding the protrusion to the recess.

Since the male member (100) is more easily and smoothly guided if the length of the inclined surface (180) is long, the length of the inclined surface (180) is preferably 0.5mm or more, more preferably 1mm or more, and still more preferably 1.5mm or more. However, if the inclined surface (180) is too long, the inclination angle tends to be small, and the guiding effect of the projection (120) is reduced. Therefore, the length of the inclined surface (180) is preferably 10mm or less, more preferably 9mm or less, and still more preferably 8mm or less.

In the present specification, the length of the inclined surface (180) is measured as the length in the normal direction of the tangent to the boundary line between the surface (161) of the second plate-like base (160) of the female member (150) and the inclined surface (180). The starting point of the inclined surface (180) is a point where the inclination toward the recessed portion (170) with respect to the surface (161) of the second plate-like base (160) is started. The end point of the inclined surface (180) is a point where the inclination angle of the inclined surface (180) is 90 DEG with respect to the surface (161) of the second plate-like base (160). When the inclined surface (180) reaches the bottom surfaces (172, 173) of the recessed portions (170) or the slope (174) before the inclination angle of the inclined surface (180) becomes 90 DEG with respect to the surface (161) of the second plate-like base (160), the end point of the inclined surface (180) is a point reaching the bottom surface or the slope. When the inclined surface (180) reaches the pawl receiving portion (176) before the inclination angle of the inclined surface (180) becomes 90 DEG with respect to the surface (161) of the second plate-like base (160), the end point of the inclined surface (180) is the point of reaching the pawl receiving portion (176).

In order to easily guide the protrusion (120) of the male member (100) to the recess (170), the average inclination angle of the inclined surface (180) of the second plate-like base (160) with respect to the surface (161) is preferably 10 to 80 °, more preferably 20 to 70 °, and still more preferably 30 to 60 °. The average inclination angle of the inclined surface (180) is an angle formed by a straight line connecting the starting point of the inclined surface (180) and the end point of the inclined surface (180) and the surface (161) of the second plate-like base (160).

(1-3. mounting and dismounting operations)

The operation of attaching and detaching the buckle (10) according to the present embodiment will be described.

First, the protrusion (120) is moved in the protruding direction and inserted into the recess (170), and the claw portion (126) of the protrusion (120) can be engaged with the claw receiving portion (176) of the recess (170). By performing this operation in the reverse direction, the operation of releasing the engagement can be performed.

Second, according to the buckle (10) of the present embodiment, when the female member (150) is viewed from the front surface (161) side, the pawl receiving portion (176) spreads into a polygonal line shape protruding toward the opposite side of the second strap attaching portion (190) (even a curved line shape can obtain the same effect), so the pawl receiving portion (176) does not exist on the second strap attaching portion (190) side. Therefore, the male member (100) can be easily disengaged by turning over the male member (100) by relatively rotating the male member (100) in a direction in which the rear surface of the first plate-shaped base portion (110) is separated from the front surface of the second plate-shaped base portion (160) with the pawl receiving portion (176) as a fulcrum from a state in which the male member (100) is engaged with the female member (150). In addition, the operation of engaging the male member (100) with the female member (150) can also be performed by bringing the claw portion (126) into contact with the claw receiving portion (176) in a state in which the male member (100) is tilted relative to the female member (150) and relatively rotating the male member (100) about the claw receiving portion (176) as a fulcrum in a direction in which the back surface of the first plate-shaped base portion (110) of the male member (100) approaches the front surface of the second plate-shaped base portion (160) of the female member (150).

Preferably, in order to facilitate the entry of fingers into the back surface (112) side of the end portion of the first plate-like base portion (110) on the side opposite to the first tape attaching portion (130) when the male member (100) is turned by hand, a curved portion (114) protruding toward the front surface (111) side of the male member (100) is provided at the end portion.

In the present embodiment, the recessed portion (170) has a groove-shaped end portion (178) that opens toward the second belt attachment portion (190). Thus, by sliding the protrusion (120) engaged with the recess (170) in the direction of the second belt attachment section (190), the protrusion (120) can be disengaged from the recess (170), and the protrusion (120) can pass through the groove-shaped end section (178) and come out of the recess (170). In addition, the protrusion (120) can slide from the groove-shaped end (178) to the opposite direction of the second belt mounting part (190), move into the recess (170), and engage with the recess (170).

(1-4. mobility in engaged state)

In the buckle (10) of the present embodiment, the male member (100) can rotate within a limited angle range around the protrusion (120) as a rotation axis while maintaining the engagement state in which the claw portion (126) is engaged with the claw receiving portion (176). Specifically, according to the buckle (10) of the present embodiment, the pawl portion (126) protrudes toward the first strap attaching portion (130), while the pawl receiving portion (176) expands in a protruding polygonal shape toward the opposite side of the second strap attaching portion (190). Thus, when the male member (100) is engaged with the female member (150) so that the first belt mounting portion (130) and the second belt mounting portion (190) are farthest from each other, in other words, are located on opposite sides of each other, the male member (100) can be rotated in both directions within the extension range of the claw receiving portion (176) with the protruding direction of the protruding portion (120) as the rotation axis, while maintaining the engaged state in which the claw portion (126) is engaged with the claw receiving portion (176).

The angle at which the male member (100) can be rotated is preferably 30 ° or more, more preferably 45 ° or more, and still more preferably 60 ° or more in both directions from the center position. The angle at which the male member (100) can be rotated is preferably 90 DEG or less in both directions from the center position. From this viewpoint, the outline of the pawl receiving portion (176) viewed from the surface (161) side of the female member (150) is preferably in a substantially コ shape or a substantially U shape with the second tape attaching portion (190) side open. Thus, the range of angles in which the claw portion (126) can be rotated is increased, and the claw portion can be rotated approximately 90 DEG in both directions from the center position.

(1-5. workability)

In the buckle (10) of the present embodiment, the length of the recessed portion (170) in the belt width direction, as viewed from the front surface (161) side of the female member (150), is constant up to halfway along the second belt attachment portion (190), and gradually increases as the second belt attachment portion (190) approaches. In other words, the length of the recessed portion (170) in the tape width direction becomes shorter as it becomes farther from the second tape mounting portion, and becomes constant from the middle. Thus, the protrusion (120) can be easily inserted into the recess (170). After the protrusion (120) is inserted into the recess (170), the male member (100) and the female member (150) are manipulated in a direction to separate from each other, whereby the protrusion (120) can be easily guided to an appropriate engagement position of the recess (170).

In a preferred embodiment, the maximum length of the recessed portion (170) in the width direction when the female member (150) is viewed from the front surface (161) side is longer than the maximum length of the protruding portion (120) in the width direction when the male member (100) is viewed from the rear surface (112) side by 2mm or more. When the difference between the maximum length of the recess (170) in the width direction and the maximum length of the protrusion (120) in the width direction is large, the protrusion (120) can be more easily inserted into the recess (170). However, if the difference in length is too large, the protrusion (120) is easily disengaged from the recess (170). The optimum value of the length difference varies depending on the size of the buckle, and is preferably 2 to 300mm, more preferably 10 to 200mm in the case of a normal-size buckle (the length in the belt width direction is about 200 to 500 mm).

In the buckle (10) according to the present embodiment, the recessed portion (170) includes: a first bottom surface (172) which is disposed inside a region formed by a polygonal line-shaped (curved line-shaped can also obtain the same effect) outline of the pawl receiving section (176) when the female member (150) is viewed from the surface (161) side and a straight line connecting both ends of the polygonal line; and a slope (174) connected to the first bottom surface (172) and rising toward the second belt mounting portion (190). As shown in fig. 4-2, when the protrusion (120) of the male member (100) is brought into contact with the slope (174), the male member (100) is guided toward the recess (170) while sliding on the slope (174). Therefore, the structure is helpful for sliding the claw part (126) of the protrusion part (120) to the opposite direction of the second belt mounting part (190) and simultaneously smoothly moving to the direction of the claw receiving part (176) of the recess part (170).

Since the relative sliding operation between the male member and the female member can be smoothly performed if the inclination angle of the slope (174) with respect to the first bottom surface (172) is small, the inclination angle of the slope (174) with respect to the first bottom surface (172) is preferably 70 ° or less, more preferably 60 ° or less. However, if the inclination angle of the slope (174) with respect to the first bottom surface (172) is too small, the male member and the female member are likely to be accidentally engaged and disengaged, and therefore, the inclination angle is preferably 20 ° or more, and more preferably 30 ° or more.

In the buckle (10) according to the present embodiment, the recessed portion (170) has a second bottom surface (173) that extends from the end of the ramp (174) on the second belt attachment portion (190) side to the groove-shaped end (178). The presence of the second bottom surface (173) enables the protrusion (120) to slide through the groove-shaped end (178) and allows smooth engagement and disengagement with the recess (170).

(1-6. magnet)

In the buckle (10) of the present embodiment, a magnet (128) is embedded in one of the protrusion (120) and the recess (170), and a magnet oriented so as to be attracted to the magnet or a metal (128) attracted to the magnet is embedded in the other. In the figure, a magnet or metal (128) that is attracted to the magnet is shown in dashed lines. According to this configuration, when the male member (100) and the female member (150) approach each other to a certain extent, even if the positional relationship is slightly shifted, the both can be automatically guided to the appropriate engagement position by the magnetic force. In addition, since the male member (100) and the female member (150) are attracted together by the magnetic force, an effect that the engagement and disengagement are not easily caused unexpectedly can be obtained.

As described above, the buckle (10) according to the present embodiment has a degree of freedom in the operation of attaching and detaching the buckle, and a high degree of accuracy is not required for the operation. Further, by using the magnet, the male member and the female member are less likely to be accidentally engaged and disengaged, and the male member and the female member are automatically guided to appropriate engagement positions.

There is no particular limitation on the method of embedding a magnet or a metal (128) that is attracted to the magnet (hereinafter, both will be collectively referred to as "magnet or the like" for simplicity) in the protrusion (120) of the male member (100). Referring to fig. 1-1, in the present embodiment, a cylindrical bottomed hole extending from the top surface (122) of the protrusion (120) in the direction of the root of the protrusion (120) is formed before embedding the magnet or the like. Before embedding the magnet or the like, an opening (123) communicating with the bottomed hole is formed in a side portion of the protrusion (120). When molten resin is caused to flow into the bottomed hole from the top surface (122) side of the protrusion (120) in a state where a cylindrical magnet or the like is disposed in the bottomed hole, a gap between the magnet or the like and the bottomed hole is filled with the resin. In addition, the side of the protrusion (120) is provided with an opening (123), so that the resin reaches the opening (123). When the resin is cured in this state, the resin is hooked to the opening (123) like a hook, so that the projection (120) is less likely to come off from the cured resin, and the magnet (128) is less likely to be pulled out.

There is no limitation on the method of embedding the magnet or the like in the recess (170) of the female member (150). Referring to fig. 2-2, in the present embodiment, a bulging portion (164) is formed on the back surface (162) of the female member (150) at a position corresponding to the first bottom surface (172) of the recessed portion (170). A bottom hole is formed in the top surface (165) of the bulging portion (164) before embedding the magnet or the like. Before embedding the magnet, an opening (163) communicating with the bottomed hole is formed at the side of the bulging portion (164). When molten resin is caused to flow into the bottomed hole from the top surface (165) side of the bulging portion (164) in a state where a cylindrical magnet or the like is disposed in the bottomed hole, a gap between the magnet or the like and the bottomed hole is filled with the resin. Further, since the side portion of the bulging portion (164) has the opening (163), the resin reaches the opening (163). When the resin is cured in this state, the resin is hooked to the opening (163) like a hook, and therefore the cured resin is less likely to come off the bulging portion (164), and the magnet (128) is less likely to be pulled out.

Examples of the resin suitable for embedding the magnet and the like include epoxy resin, polyvinyl acetate resin, vinyl acetate resin, acrylic resin, and the like.

< 2. second embodiment >

Fig. 5 shows a perspective view of the male member (100) of the buckle according to the second embodiment of the present invention, as viewed from the back side. Fig. 6 shows a perspective view of a female member (150) of a buckle according to a second embodiment of the present invention, as viewed from the front surface side. In fig. 5 and 6, the components denoted by the same reference numerals as those in the first embodiment denote the same components as those in the first embodiment, and detailed description thereof will be omitted. The following description deals with differences between the second embodiment and the first embodiment.

In the buckle (10) according to the present embodiment, the protrusion (120) has a top surface (122) and a slope (124) that is connected to the top surface (122) and that descends toward the opposite side of the first belt attachment portion (130). Similarly to the slope (174) of the recessed portion (170) described in the first embodiment, the slope (124) also contributes to smooth movement of the claw portion (126) of the protrusion (120) in the direction of the claw receiving portion (176) of the recessed portion (170) while sliding in the opposite direction of the second tape mounting portion (190). In addition, the protrusion (120) engaged with the recess (170) slides in the direction of the second belt mounting part (190) to facilitate the operation of releasing the engagement.

Since the relative sliding operation between the male member and the female member can be performed more smoothly if the inclination angle of the slope (124) with respect to the top surface (122) is small, the inclination angle of the slope (124) with respect to the top surface (122) is preferably 70 ° or less, more preferably 60 ° or less. However, if the inclination angle of the slope (124) with respect to the top surface (122) is too small, the male member and the female member are likely to be accidentally engaged and disengaged, and therefore the inclination angle of the slope (124) with respect to the top surface (122) is preferably 20 ° or more, and more preferably 30 ° or more.

The slope may be formed only on one of the protrusion (120) and the recess (170), but may be formed on both of the protrusion (120) and the recess (170).

In the buckle (10) of the present embodiment, the contour of the pawl receiving portion (176) when the female member (150) is viewed from the front surface (161) side is curved so as to protrude toward the opposite side of the second strap attaching portion (190). The curved line shape may be, for example, a substantially U-shape.

In the buckle (10) of the present embodiment, the male member (100) can be rotated within a limited angular range about the protrusion (120) as a rotation axis while maintaining the engagement state in which the claw portion (126) is engaged with the claw receiving portion (176). Since the claw receiving portion (176) is curved in outline, the male member (100) can be rotated more smoothly.

In the buckle (10) of the present embodiment, the length of the recessed portion (170) in the belt width direction when the female member (150) is viewed from the front surface (161) side gradually increases as it approaches the second belt attachment portion (190). In other words, the length of the recessed portion (170) in the tape width direction becomes shorter as it goes away from the second tape mounting portion. According to this configuration, as in the first embodiment, the protrusion (120) can be easily inserted into the recess (170). After the protrusion (120) is inserted into the recess (170), the male member (100) and the female member (150) are manipulated in a direction to separate from each other, whereby the protrusion (120) can be easily guided to an appropriate engagement position of the recess (170).

< 3. third embodiment >

Fig. 7 shows a perspective view of a female member (150) of a buckle according to a third embodiment of the present invention, as viewed from the front surface side. In fig. 7, the components denoted by the same reference numerals as those in the first embodiment denote the same components as those in the first embodiment, and detailed description thereof will be omitted. The male member (100) of the buckle according to the third embodiment is the same as that of the first embodiment, and therefore, the description thereof is omitted.

The female member (150) of the third embodiment is different from the female member of the second embodiment in that the ramps (124, 174) are not present, and is otherwise identical in construction to the female member of the second embodiment. In the female member (150) of the buckle according to the third embodiment, an upright wall (175) that stands upright relative to the first bottom surface (172) is connected to the end of the first bottom surface (172) on the second belt attachment section (190) side, in place of the slope (174). The upper end of the upright wall (175) is connected to the second bottom surface (173).

According to the buckle of the present embodiment, even when the male member (100) and the female member (150) are intended to move relatively in the approaching direction, the upright wall (129) formed on the projection (120) of the male member (100) and the upright wall (175) formed on the recess (170) of the female member (150) abut against each other and hinder the movement. In the buckle of the present embodiment, in order to perform an operation of sliding the protrusion (120) engaged with the recess (170) in the direction of the second belt attachment portion (190) to release the engagement, it is necessary to cause the top surface (122) of the protrusion (120) of the male member (100) to pass over the upright wall (175) of the female member (150). As described above, in the present embodiment, it is difficult to slide the male member (100) and the female member (150) in the direction of approaching each other, and the effect of preventing the both members from being accidentally engaged and disengaged is high.

Industrial applicability

The buckle of the present invention can be applied to various articles requiring the operation of joining and separating the ends of the belt. For example, the present invention can be applied to a belt portion of various articles such as clothes, PFD (life jacket), helmets, sporting goods, and shoes, in addition to belt products such as bags, backpacks, key chains, packaging devices, waistbands, shoulder straps, and military belts (battle belts).

Description of the reference numerals

10 Belt buckle

100 male part

110 first plate-like base

111 surface of a first plate-like base

112 back of the first plate-like base

114 bending part

120 projection

122 top surface

123 opening

124 slope

126 claw part

128 magnet or metal to be magnetized

129 upright wall

130 first belt mounting part

131 opening

150 female part

160 second plate-like base

161 surface of second plate-like base

162 back of the second plate-like base

163 opening

164 bulge out

165 top surface

170 concave part

172 first bottom surface

173 second bottom surface

174 ramp

175 upright wall

176 claw receiving part

178 slotted end

180 inclined plane

190 second belt mounting part

191 open.

Claims

1. A buckle comprising a male member (100) and a female member (150) engageable with the male member,

the male member (100) is provided with: a first plate-like base (110) having a front surface (111) and a back surface (112); a protrusion (120) that protrudes from the back surface (112) of the first plate-like base (110); and a first band attaching part (130) extending from one end of the first plate-like base part (110) and having at least one opening (131) extending in the band width direction,

the female member (150) is provided with: a second plate-like base (160) having a front surface (161) and a back surface (162); a recessed part (170) which is recessed in the surface (161) of the second plate-like base (160) and can be engaged with the protruding part (120); a second belt mounting portion (190) extending from one end of the second plate-like base portion (160) and having at least one opening (191) extending in the belt width direction; and an inclined surface (180) for connecting the surface (161) of the second plate-like base (160) and the recessed portion (170) and guiding the protruding portion (120) to the recessed portion (170),

the protrusion (120) has a claw portion (126) protruding at least toward the first belt mounting portion (130),

the recessed part (170) has a claw receiving part (176) capable of engaging with the claw part (126),

the contour of the pawl receiving portion (176) when the female member (150) is viewed from the surface (161) side is polygonal or curved and protrudes toward the opposite side of the second strap attaching portion (190),

a magnet (128) is embedded in one of the protrusion (120) and the recess (170), and a magnet having a magnetic pole oriented so as to be attracted by the magnet or a metal (128) attracted by the magnet is embedded in the other of the protrusion (120) and the recess (170).

2. The buckle according to claim 1,

the contour of the pawl receiving portion (176) viewed from the surface (161) side of the female member (150) is approximately コ -shaped or approximately U-shaped with the second tape mounting portion (190) side opened.

3. The buckle according to claim 1 or 2,

the male member (100) is rotatable about the protrusion (120) as a rotation axis while maintaining the engagement state in which the claw section (126) is engaged with the claw receiving section (176).

4. The buckle according to claim 3,

when the position where the male member (100) and the female member (150) are engaged so that the first belt mounting portion (130) and the second belt mounting portion (190) are positioned on opposite sides of each other is set as a central position, the male member (100) can be rotated within a limited angle range of 90 DEG or less in both directions from the central position with the protruding direction of the protruding portion (120) as a rotation axis, while maintaining the engaged state where the pawl portion (126) is engaged with the pawl receiving portion (176).

5. The buckle according to any one of claims 1 to 4,

the length of the recessed portion (170) in the belt width direction when the female member (150) is viewed from the surface (161) side is gradually increased as it approaches the second belt attachment portion (190), or is fixed to the middle of the second belt attachment portion (190) and is further gradually increased as it approaches the second belt attachment portion (190).

6. The buckle according to any one of claims 1 to 5,

the maximum length of the recessed portion (170) in the width direction when the female member (150) is viewed from the front surface (161) side is longer than the maximum length of the protruding portion (120) in the width direction when the male member (100) is viewed from the rear surface (112) side by 2mm or more.

7. The buckle according to any one of claims 1 to 6,

the recessed portion (170) has a groove-shaped end portion (178) that opens toward the second belt attachment portion (190).

8. The buckle according to any one of claims 1 to 7,

the recessed section (170) has a first bottom surface (172) and a slope (174), the first bottom surface (172) is disposed inside a region formed by a polygonal or curved contour of the pawl receiving section (176) when the female member (150) is viewed from the surface (161) side and a straight line connecting both ends of the polygonal or curved line, and the slope (174) is connected to the first bottom surface (172) and rises toward the second tape attachment section (190).

9. The buckle according to claim 8, as dependent on claim 7,

the recessed portion (170) has a second bottom surface (173) extending from the end of the slope (174) on the second tape mounting portion (190) side to the groove-like end (178).

10. The buckle according to any one of claims 1 to 9,

the protrusion (120) has a top surface (122) and a slope (124), and the slope (124) is connected to the top surface (122) and descends toward the opposite side of the first belt attachment section (130).

11. The buckle according to any one of claims 1 to 10,

the inclined surface (180) is formed along the contour of the pawl receiving portion (176) as viewed from the surface (161) side of the female member (150).

12. The buckle according to any one of claims 1 to 11,

the length of the inclined surface (180) is more than 0.5 mm.

13. The buckle according to any one of claims 1 to 12,

the protrusion (120) has a claw portion (126) protruding only toward the first tape mounting portion (130).

14. An article having the buckle of any one of claims 1-13.