JP2013103033A - Buckle provided with lock mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight buckle provided with lock mechanism, which is easily manufactured and can prevent engagement release to pressing force directly acting on an operation plate.SOLUTION: A sliding piece which is movable on an upper part of the operation plate of the buckle is mounted on the buckle body. When the sliding piece exists on a connecting shaft, an end of the sliding piece is fit with a notch part arranged on a top frame and a band can freely approach but cannot retreat from the buckle in such a state. In a state that the fitting is released and the sliding piece is moved to one end side of the operation plate, the sliding of the operation plate is restricted. In a state that the sliding piece is moved to the other end side of the operation plate, the fitting is released.

Description

The present invention relates to a buckle for locking a band or belt having an engagement groove, and particularly for products that require a relatively strong fastening force, such as athletic shoes, competition shoes, snowboard shoes, and protector locking belts. For the buckle.

Conventionally, a buckle is known in which an engagement groove is provided in a band (or belt), a hook of a buckle is elastically engaged with the groove, and the locked state can be released at any time.
In Japanese Patent No. 3989555 (Patent Document 1), the inventors of the present invention are an easy-to-manufacture and lightweight synthetic resin buckle that includes an opposing bottom plate, a ceiling frame, and both side plates that connect the two, and the interior is related. A buckle body which is a space for inserting a band having a mating groove, an engagement claw which is horizontally installed on the inner side of the ceiling frame and can be engaged with the engagement groove of the band on the lower surface of the one end, and the other end An operation plate having an upper surface as a pressing portion, and connecting the operation plate to two opposite sides of the ceiling frame at the intermediate point between the engaging claw and the pressing portion. A synthetic resin buckle that is freely swingable as a synthetic resin provided with a pair of hooking projections on the outer surface of the band and the ceiling frame, and the band can be pulled to the buckle body with a fingertip of one hand. Proposed buckle made.

  The synthetic resin buckle is very excellent in function and is optimal as a headband buckle for helmets, but in order to improve the operability in engagement / release of the operation plate, a connecting shaft that supports the operation plate is used. When it is thinned, when this is applied to a product that requires a relatively strong fastening force, such as athletic shoes, a strong force acts in the direction of pulling the band away from the buckle when the band and the buckle are locked. There was a possibility that the connecting shaft was damaged.

  In addition, in the patent No. 4005109 (Patent Document 2), the present inventors have a light and simple configuration as a band and buckle slide adjuster particularly suitable for use as clothing and the like, and the buckle portion is not conspicuous. As a slide adjuster having an appearance, a band and a buckle that engage with a hook-like engagement claw formed in a serrated engagement groove formed on the outer surface of the band and in which the band is accessible to the buckle but cannot be retracted. In the slide adjuster of the present invention, the buckle comprises a bottom plate, a ceiling frame, and both side plates connecting the two, and a buckle main body having a band insertion space inside, and is horizontally installed inside the ceiling frame, and has a bottom surface at one end. And an operation plate having an engaging claw engageable with the engaging groove of the band and having the other end as a pressing portion for releasing the engagement. And the support plate is supported by a connecting shaft that connects the both side plates at an intermediate point between the engaging claw and the pressing portion, thereby allowing the operation point to swing around the intermediate point, and the outer surface of the band. The pressing portion is provided with a pair of latching projections capable of pulling the buckle and the band with the fingertips of one hand, and the latching projections with respect to the operation plate extending from the connecting shaft to the latching projections The member which provided the member which regulates that the pressing force of a perpendicular direction acts directly on a part other than is proposed in the buckle main part.

  Since this slide adjuster is provided with a regulating member, there is no risk of inadvertent or sudden unlocking, but it is not necessary to unlock the pressing force that acts directly on the pressing part or the latching protrusion. It cannot be prevented. Further, when pulling out the buckle from the band, there is a problem that the operation is complicated because the buckle has to be pulled out while pressing the pressing portion.

Japanese Patent No. 3982955 Japanese Patent No. 4005109

It is an object of the present invention to provide a buckle with a lock mechanism that can prevent disengagement even against a pressing force that directly acts on the operation plate, in addition to being lightweight and easy to manufacture. Is.
It is another object of the present invention to realize reliable operability by providing a mechanism that enables easy engagement locking and disengagement only by operating the slide piece and that determines the position of the slide piece. Is.

  The present invention relates to a buckle in which an engagement claw of a buckle can be engaged with a serrated engagement groove formed on the outer surface of the band, and the buckle includes a bottom plate, a ceiling frame, and both side plates that connect the both. And a control body having an engaging claw that is horizontally installed inside the ceiling frame and engageable with the engaging groove of the band. A buckle that is swingable about the intermediate point by supporting the operation plate with a connecting shaft that connects the two side plates at the intermediate point, and a slide piece that is movable on the upper part of the operation plate is the buckle. A notch in which a slide guide that guides movement of the slide piece is provided inside the buckle, and an end portion of the slide piece is provided in the ceiling frame when the slide piece is on the connecting shaft. In this state, the band is accessible to the buckle but cannot be retracted. In the state where the fitting is released and the slide piece is moved to the one end side of the operation plate, the operation plate is swung. The movement is restricted, and the engagement is released when the operation plate is moved to the other end side of the operation plate.

It is preferable that the slide piece has elasticity, and the fitting and releasing can be performed by its own elastic deformation.
When the slide piece moves from the connection shaft to one end side or the other end side of the operation plate, the slide guide is inclined to the slide guide so that the slide piece is lowered from the ceiling frame side toward the bottom plate side. It is preferable to form.

The end surface of the notch portion is opposed to the opposite side of the slide piece with an inclined surface, and the gap between the notch portion and the slide piece is formed so that the angle of the inclined surface approaches the bottom plate. Is preferred.
The end surface of the slide piece is opposed to the opposite side of the notch with an inclined surface, and the gap between the slide piece and the notch is narrowed as the angle of the inclined surface approaches the bottom plate. preferable.

It is preferable that a slide operation unit is provided on the slide piece.
It is preferable that the slide operation unit also serves as a latching unit capable of pulling the band and buckle with a fingertip of one hand.

The buckle of the present invention can prevent disengagement even against a pressing force that directly acts on the operation plate. Further, the engagement lock and the engagement release can be easily performed only by operating the slide piece, and the slide piece can be fixed at a desired position. In addition, when the slide piece is on the connecting shaft, the band can be accessed to the buckle but cannot be retracted by the action of the slide piece. Therefore, the connecting shaft can be made of an elastic material or a spring can be attached to the connecting shaft. There is no need to use a material, and it is possible to provide a buckle with higher strength by freely selecting the material of the connecting shaft.
Therefore, this buckle is optimally applied to products that require a relatively strong fastening force such as athletic shoes.

1 is a perspective view of a buckle 10. FIG. 3 is a longitudinal sectional side view of a main part showing an engaged state of a buckle 10 and a band 30. It is a perspective view which shows other embodiment of the buckle. It is a principal part vertical side view which shows another embodiment of the buckle. It is a principal part vertical side view which shows another embodiment of the buckle.

Hereinafter, embodiments of a buckle with a lock mechanism according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a buckle 10. In these drawings, the buckle 10 is a flat plate comprising a bottom plate 11, a ceiling frame 12 facing the bottom plate 11, and side plates 13 and 13 connecting the bottom plate 11 and the ceiling frame 12. The main body is constituted by the cylindrical buckle body 14. The buckle body 14 is opened in the band sliding direction as insertion holes 15, 15, and the inside thereof becomes an insertion space 16 of the band 30 having an engagement groove described later.

  In the present embodiment, the length of the bottom plate 11 in the longitudinal direction (the sliding direction of the band) is made longer than the length of the ceiling frame 12 in the longitudinal direction, whereby the connected body of the buckle 10 (that is, an athletic shoe band or the like). The band can be easily inserted and the band can be inserted smoothly. Moreover, the same effect can be acquired also by comprising the ceiling frame 12 with a flat board.

  On the inner side of the ceiling frame 12, an operation plate 20 having a size that fits in the ceiling frame 12 is horizontally installed. An engaging claw 21 (see FIG. 2 to be described later) that can engage with the engaging groove of the band 30 protrudes from the lower surface of the one end portion 20 </ b> A of the operation plate 20. By making the operation plate 20 slightly lower than the ceiling frame 12, it is possible to prevent the one end portion 20A or the other end portion 20B of the operation plate 20 from being inadvertently pushed down.

A connecting shaft 25 is formed at an intermediate portion in the longitudinal direction of the operation plate 20, and this connecting shaft 25 is supported on the upper inner walls of the side plates 13 and 13.
In this embodiment, the cross section of the connecting shaft 25 is rectangular, but it can be circular, elliptical, or other various cross sectional shapes. It is desirable that the connecting shaft 25 pivotally supports the operation plate 20 and is made as thin as possible in order to ensure smooth operability. Just do it.

The buckle body 14 is provided with an elastic slide piece 40 that can move in the horizontal direction on the upper portion of the operation plate 20. In the present embodiment, the slide piece has a rectangular shape, but it does not have to be rectangular.
On the surface of the slide piece 40, a slide operation unit 42 is provided so as to protrude upward. There is no particular limitation on the shape of the slide operation unit 42, and any shape that can hook the fingertip of one hand may be used. The slide operation unit 42 is not necessarily provided on the slide piece 40. However, by providing this, the slide operation of the slide piece 40 can be facilitated, and the band 30 and the buckle 10 are drawn with one hand as will be described later. It can also serve as a latching part.

  Further, slide guides 18 and 18 for guiding the movement of the slide piece 40 are provided inside the buckle 10. In the present embodiment, the slide guides 18 and 18 are formed as shelves extending horizontally from the side plates 13 and 13 of the buckle 10 to the inside of the buckle 10. However, any slide guide can be used as long as it can guide the smooth movement of the slide piece 40. There are no particular restrictions on the shape of the 18 or the like.

Next, the operation of the buckle 10 will be described with reference to FIG. FIG. 2A is a longitudinal sectional side view of the main part showing an engaged state of the buckle 10 and the band 30.
In FIG. 2A, the band 30 is inserted into the insertion space 16 of the buckle 10, and the engagement claw 21 of the buckle 10 is engaged with the engagement groove 31 formed on the outer surface of the band 30. The engagement groove 31 has a sawtooth cross-sectional shape in the sliding direction, that is, a tapered surface that gradually becomes deeper in the traveling direction of the band 30 and a wall surface that rises substantially perpendicularly from the deepest position.

  When the slide piece 40 is positioned on the connecting shaft 25, the slide piece 40 bends upward due to its elasticity, and both ends in the longitudinal direction of the slide piece 40 are notched portions 17 provided in the ceiling frame 12. 17 is fitted. As a result, the position of the slide piece 40 is fixed, and it is possible to prevent malfunction due to inadvertent movement of the slide piece 40 and to provide the buckle 10 excellent in safety. Further, since the position of the slide piece 40 is in a fixed state, the slide operation unit 42 on the slide piece 40 can also serve as a hook for pulling the band and buckle with the fingertip of one hand. . In the present embodiment, the two notch portions 17 are provided symmetrically in the left-right direction, but the two notch portions 17 are not necessarily required, and any one of them may be provided.

In this state, when the band 30 is inserted into the insertion space 16 from the insertion port 15 on the other end 20B side (left side in FIG. 2) of the operation plate 20, the upper surface of the band 30 is engaged with the engaging claws 21 of the operation plate 20. And the one end portion 20A of the operation plate 20 is pushed up and moved forward (see FIG. 2B), and the approach / separation position of the band 30 with respect to the buckle 10 is adjusted.
In this state, as shown in FIG. 2 (1), since the engaging claw 31 is engaged with and locked with the predetermined engaging groove 12, the band 30 can be advanced with respect to the buckle 10, but is retracted. It is impossible.

Next, the lock mechanism by the slide piece of this invention is demonstrated.
As described above, FIG. 2 (1) shows the locked state of the engaging groove 31 of the band 30 and the engaging claw 21 of the buckle 10. At this time, the slide piece 40 is positioned on the connecting shaft 25. When the vertical pressing force acts on the other end 20B of the operation plate 20, the engagement is released.
Here, as shown in FIG. 1 (2), when the slide piece 40 is pressed vertically from above to make it horizontal, the slide piece 40 and the notch 17 are disengaged, and the slide piece 40 It becomes possible to move below the ceiling frame 12. Subsequently, as shown in FIG. 1 (3), if the slide piece 40 is moved along the slide guides 18, 18 toward the one end portion 20 </ b> A of the operation plate 20, the rotation of the operation plate 20 is restricted by the slide piece 40. In this state, the other end 20B does not move even if it is pushed. Further, the elasticity of the slide piece 40 causes a force that the upper surface of the slide piece 40 pushes up the lower surface of the ceiling frame 12, so that the position of the slide piece 40 is fixed and the other end portion 22B is kept locked (see FIG. 2 (3).)

  In the present embodiment, the lower surface of the slide piece 40 is set to contact the upper surface of the one end portion 20A of the operation plate 20, but the lower surface of the slide piece 40 does not necessarily contact the upper surface of the one end portion 20A of the operation plate 20. The distance between the lower surface of the slide piece 40 in the locked state and the upper surface of the one end portion 20A of the operation plate 20 is such that the rotation of the operation plate 20 is regulated so that the engagement claw 21 does not come off the engagement groove 31. Just do it.

Next, in order to retract or pull out the band 30 from the buckle 10, as shown in FIG. 1 (2), the slide piece 40 is pressed in the vertical direction from above, and both ends of the slide piece 40 and the notches are cut out. If the slide piece 40 is moved to the other end 20B side of the operation plate 20 along the slide guides 18 and 18 as shown in FIG. As shown in (4), as the operation plate 20 rotates around the connecting shaft 25, the engaging claw 21 located on the opposite side is lifted and the engaging claw 21 is disengaged from the engaging groove 31, so that the band 30 Can be slid freely. In this state, the force of the upper surface of the slide piece 40 pushing up the lower surface of the ceiling frame 12 acts due to the elasticity of the slide piece 40, so that the position of the slide piece 40 is fixed.
When the slide piece 40 is slid on the connecting shaft 25, the slide piece 40 returns to the curved state due to its elasticity, and the operation plate 20 returns to the original horizontal state.

Another embodiment of the buckle 10 will be described with reference to FIG.
In this embodiment, as shown in FIG. 3 (1), the slide operation portion 42 on the slide piece 40 is provided in a concave shape, and the surface area gradually increases as the ceiling frame 12 approaches the end side of the operation plate 20. It is set to be. Therefore, when the slide piece 40 is moved along the slide guides 18 and 18 toward the one end 20A or the other end 20B of the operation plate 20 (see FIGS. 3 (2) and 3), the ceiling frame is used. The force with which the lower surface of 12 presses the upper surface of the slide piece 40 increases.
Therefore, it becomes possible to employ the slide piece 40 having greater elasticity, and the position of the slide piece 40 can be more firmly fixed.

Another embodiment of the buckle 10 will be described with reference to FIG. FIG. 4 is a longitudinal sectional side view of an essential part showing this embodiment.
In this embodiment, as shown in FIG. 4 (1), the end surfaces of the notches 17 and 17 face the opposite sides of the slide piece 40 with the inclined surface 17A, and the angle of the inclined surface 17A approaches the bottom plate 11 as the angle approaches the bottom plate 11. The gaps between the notches 17 and 17 and the slide piece 40 are formed to be widened. For this reason, if a horizontal force is applied to the slide piece 40 from the state in which the slide piece 40 is fitted to the notches 17 and 17, the slide piece 40 moves along the inclined surface 17A from the ceiling frame 12 side to the bottom plate 11 direction. To disengage the fitting (see FIGS. 4 (2) and (3)).

  Therefore, when the slide piece 40 having elasticity is used, the slide piece 40 is moved to the one end 20A side or the other end 20B side of the operation plate 20 without pressing the slide piece 40 in the vertical direction from above. Is possible. Further, as shown in FIG. 4 (4), the end surface of the slide piece 40 faces the opposite side of the notches 17, 17 with an inclined surface 17 B, and the angle of the inclined surface approaches the bottom plate 11 as the slide piece 40 approaches. The same effect can be obtained even if the gaps between the notches 17 and 17 are narrowed.

  In this embodiment, when the slide piece 40 having elasticity is used, as the slide piece 40 moves from the connecting shaft 25 to the one end portion 20A side or the other end portion 20B side of the operation plate 20, the slide piece 40 moves from the curved state. In order to deform | transform into a horizontal state, it is preferable to make the slide guides 18 and 18 into the shape matched with the said deformation | transformation so that the slide piece 40 can move smoothly. Specifically, the distance between the two slide guides 18 and 18 may be formed so as to increase from the connecting shaft 25 toward the one end 20 side and the other end 20B of the operation plate 20.

Next, still another embodiment of the buckle 10 will be described with reference to FIG. FIG. 5 is a longitudinal sectional side view of an essential part showing this embodiment.
In the present embodiment, when the slide piece 40 moves from the connection shaft 25 to the one end 20A side or the other end 20B side of the operation plate, the slide piece 40 is lowered from the ceiling frame 12 side toward the bottom plate 11 side. The slide guides 18 and 18 are formed with inclined surfaces 18A. For this reason, if a horizontal force is applied to the slide piece 40 from the state in which the slide piece 40 is fitted to the notches 17, 17, the slide piece 40 moves along the inclined surface 18 </ b> A from the ceiling frame 12 side toward the bottom plate 11. To disengage the fitting.
Therefore, unlike the embodiments described so far, it is not necessary to use the slide piece 40 having elasticity, and the slide piece 40 can be made of metal.

  Although there is no special restriction | limiting in the raw material of the buckle 10, it becomes possible to provide the light weight and high intensity | strength buckle 10 by shape | molding other parts with a synthetic resin by making the connection shaft 25 metal.

  In the present invention, the ceiling frame 12 is not necessarily limited to one having four sides. The one side facing the one end portion 20A of the operation plate 20 and / or the one side facing the other end portion 20B of the operation plate 20 can be omitted when the buckle is reduced in weight and size.

The buckle 10 of the present invention can incorporate the elements disclosed in Patent Document 1 and Patent Document 2 described above. For example, instead of the connecting shaft 25, a connecting side (not shown) that connects the upper edge portion of the operation plate 20 and the upper portion of the ceiling frame 12 may be used.
Further, in order to easily restore the operation plate 20 to a horizontal state, a connection member (not shown) that connects the one end 20 </ b> A of the operation plate 20 to the ceiling frame 12 facing the operation plate 20 may be provided. Further, a band presser (not shown) for preventing the band 30 from lifting can be provided in the insertion space 16.

10 Buckle 11 Bottom plate 12 Ceiling frame 13 Side plate 14 Buckle body 16 Insertion space 17 Notch portion 18 Slide guide 20 Operation plate 20A One end portion 20B of the operation plate 21 Other end portion 21 of the operation plate 25 Engaging claw 25 Connecting shaft 30 Band 31 Engagement Groove 40 Slide piece 42 Slide operation part

Claims (7)

A buckle in which an engagement claw of a buckle can be engaged with a serrated engagement groove formed on the outer surface of the band, the buckle comprising an opposing bottom plate, a ceiling frame, and both side plates connecting both A buckle body having a band insertion space, and an operation plate that is horizontally installed on the inner side of the ceiling frame and has an engaging claw engageable with the engaging groove of the band on the lower surface of one end. In a buckle that is swingable with the intermediate point as a fulcrum by supporting the plate with a connecting shaft that connects the two side plates at the intermediate point,
A slide piece that is movable on the upper part of the operation plate is installed in the buckle body, and a slide guide that guides the movement of the slide piece is provided inside the buckle,
When the slide piece is on the connecting shaft, the end of the slide piece is fitted into a notch provided in the ceiling frame, and in this state the band is accessible to the buckle but cannot be retracted,
When the fitting is released and the slide piece is moved to one end of the operation plate, the swing of the operation plate is restricted, and when the slide piece is moved to the other end of the operation plate, the engagement is released. Buckle characterized by being made.   The buckle according to claim 1, wherein the slide piece has elasticity, and the fitting and releasing can be performed by elastic deformation of the sliding piece.   When the slide piece moves from the connection shaft to one end side or the other end side of the operation plate, the slide guide is inclined to the slide guide so that the slide piece is lowered from the ceiling frame side toward the bottom plate side. The buckle according to claim 1 formed.   An end surface of the notch portion is opposed to the opposite side of the slide piece with an inclined surface, and the gap between the notch portion and the slide piece is formed so that the angle of the inclined surface approaches the bottom plate. The buckle according to any one of Items 1 to 3.   The end face of the slide piece is opposed to the opposite side of the notch with an inclined surface, and the gap between the slide piece and the notch is narrowed as the angle of the inclined surface approaches the bottom plate. The buckle according to any one of 1 to 3.   The buckle according to claim 1, wherein a slide operation unit is provided on the slide piece.   The buckle according to claim 6, wherein the slide operation unit also serves as a latching unit capable of pulling the band and the buckle with a fingertip of one hand.