CN107307497B

CN107307497B - Helmet buckle

Info

Publication number: CN107307497B
Application number: CN201610380556.7A
Authority: CN
Inventors: 金成光
Original assignee: HJC Corp
Current assignee: HJC Corp
Priority date: 2016-04-26
Filing date: 2016-05-31
Publication date: 2020-04-28
Anticipated expiration: 2036-05-31
Also published as: KR101791655B1; CN107307497A; EP3238558A1; EP3238558B1; ES2774907T3

Abstract

Disclosed is a helmet buckle, comprising: a belt unit having a first tooth portion; a base unit for guiding sliding of the belt unit when the belt unit is introduced or retracted; a locking unit pivotably secured to one side of the base unit and having a second tooth on one surface thereof facing the belt unit to correspond to the first tooth, the second tooth being pushed toward the belt unit; and an operating unit fastened to the other side of the base unit to be movable toward the locking unit, the operating unit for pivoting the locking unit such that the second tooth portion moves away from the belt unit when the operating unit moves toward the locking unit to apply pressure to the locking unit.

Description

Helmet buckle

Technical Field

The invention relates to a helmet buckle.

Background

Helmet buckles are used for sports helmets (including motorcycle helmets, ski helmets, etc.) and are means for fastening/unfastening, length adjustment, etc. of a strap provided to the helmet. As such, the helmet buckle needs to firmly fix the band fastened thereto and to achieve easy manipulation of the buckle at the time of fastening/unfastening or length adjustment of the band.

As disclosed in the following prior art patent documents, there is an invention named "Buckle device for Length Adjustment" in the prior art. This prior art discloses a configuration for fastening or unfastening the strap 110 or adjusting the length of the strap 110 using the lever 230. Specifically, according to the prior art, when the lever 230 is pulled in the direction opposite to the introduction direction of the strap 110, the lever 230 rotates about the shaft together with the catch 220, so that the teeth 221 of the catch 220 are disengaged from the gear teeth 111 of the strap 110. Thus, the fastening of the catcher 220 and the strap 110 is released.

However, since the related art relates to a pull type device for pulling the lever 230, the user may have difficulty in operating while riding a motorcycle or enjoying sports (e.g., skiing).

Documents of the prior art

Patent document

Patent document 1: KR 10-1430435B 1

Disclosure of Invention

Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a push-type helmet buckle in which a locking unit pivots as a user pushes an operating unit, so that fastening of the locking unit and a belt unit can be released.

In accordance with one aspect of the present invention to achieve the above and other objects, there is provided a helmet buckle comprising: a belt unit having a first tooth comprising one or more teeth and a recess; a base unit for guiding sliding of the belt unit when the belt unit is introduced or retracted; a locking unit pivotably fastened to one side of the base unit, the locking unit having a second tooth portion on one surface thereof facing the belt unit, the second tooth portion including one or more teeth and recesses to correspond to the first tooth portion, the second tooth portion being pushed toward the belt unit; and an operating unit fastened to the other side of the base unit to be movable toward the locking unit, the operating unit for pivoting the locking unit such that the second tooth portion moves away from the belt unit when the operating unit moves toward the locking unit to apply pressure to the locking unit.

Further, the locking unit may have a first slope on an end thereof facing the operating unit, the operating unit may have a second slope on an end thereof facing the locking unit, and the second slope may slide on the first slope when the operating unit moves toward the locking unit, thereby pushing one surface of the locking unit so that the locking unit pivots.

Further, a first one of the teeth and recesses of the first tooth portion, which first meets the teeth and recesses of the second tooth portion when the belt unit is introduced into the base unit, may have a width smaller than a width of a first one of the teeth and recesses of the second tooth portion, which first meets the teeth and recesses of the first tooth portion when the belt unit is introduced into the base unit, and may have a width equal to or greater than a width of a second one of the teeth and recesses of the second tooth portion, which second meets the teeth and recesses of the first tooth portion when the belt unit is introduced into the base unit.

Further, the buckle may further include an elastic member provided between the base unit and the locking unit, the elastic member for providing an elastic force to allow the second tooth portion to be pushed toward the belt unit.

Further, the elastic member may be a torsion spring, and one end of the torsion spring may be caught by the elastic support portion of the base unit and the other end of the torsion spring is caught by the locking unit.

Further, the base unit may include: a bottom wall extending in a plate shape to correspond to the belt unit; and a pair of side walls extending from opposite sides of the bottom wall to face each other, a locking unit being pivotably secured to one end of each of the side walls and an operating unit being movably secured to the other end of the side walls.

Further, the side wall may have a first fastening hole formed in one end thereof, the locking unit may have a second fastening hole formed at a position corresponding to the first fastening hole therein, and the first fastening pin may be inserted through the first and second fastening holes.

Further, the side wall may have a third fastening hole formed in the other end thereof, the operation unit may have a fourth fastening hole formed therein at a position corresponding to the third fastening hole, and the second fastening pin may be inserted through the third and fourth fastening holes. Further, the width of the fourth fastening hole in the given direction may be larger than the diameter of the second fastening pin to allow the operation unit to be movable relative to the base unit toward the locking unit.

Further, the side wall may have a guide groove formed in the other end thereof to be recessed toward the locking unit, and the operation unit may have a guide protrusion inserted into the guide groove to move along the guide groove.

Further, the base unit may further include a guide member extending from an end of the bottom wall into which the belt unit is introduced, and the guide member may be inclined from the end of the bottom wall in a direction opposite to a direction in which the side wall extends from the bottom wall.

The features and advantages of the present invention will become more apparent from the following detailed description, which proceeds with reference to the accompanying drawings.

The terms or words used in the specification and claims of the present invention should not be interpreted in an exemplary or dictionary-limited sense, and should be construed as meanings and concepts conforming to the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the terms in order to best explain the present invention.

Drawings

The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

fig. 1 is a perspective view illustrating a helmet buckle according to one embodiment of the present invention;

fig. 2 is an exploded perspective view illustrating a helmet buckle according to an embodiment of the present invention;

fig. 3 is a plan view illustrating a helmet buckle according to an embodiment of the present invention;

fig. 4A and 4B are sectional views illustrating a helmet buckle according to an embodiment of the present invention;

fig. 5A to 5C are plan views illustrating an initial process of fastening a helmet buckle according to an embodiment of the present invention;

fig. 6 to 10 are sectional views illustrating the operation of the helmet buckle according to the embodiment of the present invention; and

fig. 11 is a side view illustrating a helmet buckle according to another embodiment of the present invention.

Detailed Description

The objects, specific advantages and novel features of the invention will become apparent from the following detailed description of illustrative embodiments when considered in conjunction with the drawings. In the specification, with reference to reference numerals added to constituent elements shown in respective drawings, it should be noted that the same constituent elements are denoted by the same reference numerals even though they are depicted in different drawings. In addition, the terms "first", "second", "one end", "the other end", and the like are only used to distinguish any one element from other elements, and the elements are not limited by the terms. In the following description of the present invention, a detailed description of known functions incorporated herein will be omitted when it may make the subject matter of the present disclosure rather unclear.

Basically, the helmet buckle according to the embodiment of the present invention is used in sports helmets (including motorcycle helmets, ski helmets, etc.) and is a device for fastening/unfastening, length adjustment, etc. of a strap provided in the helmet.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a perspective view illustrating a helmet buckle according to an embodiment of the present invention, and fig. 2 is an exploded perspective view illustrating a helmet buckle according to an embodiment of the present invention.

As shown in fig. 1 and 2, a helmet buckle according to an embodiment of the present invention, which is denoted by reference numeral 100, includes a band unit 300, a base unit 400, a locking unit 500, and an operating unit 600, wherein the band unit 300 has a first tooth portion 340 including one or more teeth and recesses; the base unit 400 serves to guide the sliding of the belt unit 300 when the belt unit 300 is introduced or retracted; the locking unit 500 is pivotably fastened to one side of the base unit 400 and has a second tooth part 540 on one surface thereof facing the belt unit 300, the second tooth part 540 including one or more teeth and recesses to correspond to the first tooth part 340 and adapted to be pushed toward the belt unit 300; the operating unit 600 is fastened to the other side of the base unit 400 so as to be movable toward the locking unit 500, and the operating unit 600 is configured to pivot the locking unit 500 such that the second tooth 540 moves away from the belt unit 300 when the operating unit 600 moves toward the locking unit 500 to apply pressure to the locking unit 500.

The band unit 300 may be fastened to the locking unit 500 and may, for example, include a body 310, a mounting member 320, and a third fastening pin 330. Here, the main body 310 may take the form of a bent plate to be introduced into or withdrawn from the base unit 400 under the guidance of the base unit 400, and may include, for example, an introduction part 313, an extension part 315, and a stopper part 317. At this time, the introduction part 313 is located at one end of the main body 310 and thus is a portion initially introduced into the base unit 400. Further, in order to allow the belt unit 300 to be easily introduced into the base unit 400, both corners of the introduction part 313 may be rounded. Further, the extension part 315 extends from the introduction part 313 to the stopper part 317, and has a first tooth part 340 on one surface (i.e., an upper surface) thereof facing the locking unit 500. Here, the first tooth portion 340 includes one or more teeth and depressions. That is, the first tooth portion 340 includes the teeth 343 and the depressions 341 arranged in combination in this order. At this time, the first teeth 340 may be engaged with the second teeth 540 of the locking unit 500. Meanwhile, the stopper 317 may extend obliquely from the extension 315 and may serve to restrict the introduction of the band unit 300 into the base unit 400. Specifically, when the inclined portion of the stopper portion 317 comes into contact with the elastic support portion 440 of the base unit 400 as the extension portion 315 is introduced into the base unit 400, the introduction of the band unit 300 into the base unit 400 is restricted. Further, the mount 320 is configured to be connected to, for example, a strap or a belt, so as to be mounted to the helmet. The mounting member 320 may be pivotably fastened to the stopper 317 of the main body 310 using the third fastening pin 330.

The base unit 400 serves to guide the sliding of the belt unit 300 when the belt unit 300 is introduced or retracted, and also serves to support the locking unit 500 and the operating unit 600. Here, the base unit 400 may include a bottom wall 410 and a side wall 420. At this time, the bottom wall 410 may extend to have a plate shape to correspond to the belt unit 300, and the sidewalls 420 may extend in pairs from opposite sides (i.e., longitudinal edges) of the bottom wall 410 to face each other. The locking unit 500 is pivotably fastened to one of the side walls 420 (in the introduction direction of the belt unit 300), and the operating unit 600 is movably fastened to the other of the side walls 420 (in the direction opposite to the introduction direction of the belt unit 300). More specifically, a first fastening hole 421 is formed in one end of each of the sidewalls 420, and a second fastening hole 521 is formed in the locking unit 500 at a position corresponding to the first fastening hole 421, and the first fastening pin 423 is inserted through the first and second fastening holes 421 and 521. In this way, the locking unit 500 may be pivotably fastened to one end of the corresponding sidewall 420 using the first fastening pin 423 as a rotation axis. Further, a third fastening hole 425 is formed in the other end of each of the sidewalls 420, while a fourth fastening hole 625 is formed in the operation unit 600 at a position corresponding to the third fastening hole 425, and a second fastening pin 427 is inserted through the third fastening hole 425 and the fourth fastening hole 625. At this time, although the diameter of the third fastening hole 425 may correspond to the diameter D of the second fastening pin 427 as shown in fig. 3 and 4, the width W4 of the fourth fastening hole 625 in a given direction (i.e., the introduction direction of the belt unit 300) may be greater than the diameter of the second fastening pin 427. When the width W4 of the fourth fastening hole 625 in a given direction is greater than the diameter D2 of the second fastening pin 427 as described above, the operation unit 600 may be fastened to the other sidewall 420 to be linearly moved toward the locking unit 500 with respect to the base unit 400. Further, as shown in fig. 1, a guide groove 429 is formed in the other end of each of the side walls 420 (i.e., the end located in the direction opposite to the introduction direction of the belt unit 300) to be recessed toward the lock unit 500 (in the introduction direction of the belt unit 300), and a guide protrusion 629 may be formed on the operation unit 600 to be inserted into the guide groove 429 and linearly moved along the guide groove 429. In summary, when the operation unit 600 is linearly moved toward the lock unit 500 with respect to the base unit 400, the operation unit 600 may be guided by the guide groove 429 into which the guide protrusion 629 is inserted and the second fastening pin 427 inserted into the fourth fastening hole 625.

Further, the base unit 400 is connected to, for example, a band or a strap, thereby being mounted to the helmet. For this purpose, the base unit 400 may include a connection portion 430 for connecting a strap or a belt. Here, the connection part 430 may extend from the other end (i.e., one end located in the opposite direction to the introduction direction of the belt unit 300) of each of the sidewalls 420 to be distant from the operation unit 600 (i.e., downward from the operation unit 600). Further, the base unit 400 may include an elastic support portion 440, by which one end of an elastic member 510 for providing an elastic force to the locking unit 500 is clamped by the elastic support portion 440. Here, the elastic support portion 440 may extend to connect the ends of the sidewalls 420 (i.e., the ends located in the introduction direction of the belt unit 300) to each other.

The locking unit 500 is used to fix the belt unit 300 or to accomplish introduction or withdrawal of the belt unit 300. As described above, the locking unit 500 is pivotably fastened to one side of the base unit 400 using the first fastening pin 423. Here, since the locking unit 500 is disposed so as to be spaced apart from the bottom wall 410 of the base unit 400 (see fig. 4A), the belt unit 300 may be introduced or retracted through a gap between the bottom wall 410 of the base unit 400 and the locking unit 500. Further, the locking unit 500 has a second tooth 540 on a surface thereof facing the belt unit 300 (i.e., a lower surface), the second tooth corresponding to the first tooth 340 of the belt unit 300. Here, the second tooth 540 includes one or more teeth and depressions. That is, as shown in fig. 2, the second tooth portion 540 includes a tooth 543 and a recess 541 arranged in combination in this order. At this time, as shown in fig. 4A, since the elastic member 510 of the locking unit 500 applies an elastic force to the belt unit 300 via the first fastening pin 423 as a rotation axis, the second tooth 540 of the locking unit 500 may be pushed toward the belt unit 300 so as to be engaged with the first tooth 340 of the belt unit 300. Meanwhile, the teeth 543 of the second tooth part 540 and the teeth 343 of the first tooth part 340 may be inclined to correspond to each other. Accordingly, when the user attempts to introduce the belt unit 300 into the base unit 400, the locking unit 500 pivots about the first fastening pin 423 as a rotation axis by a predetermined angle to allow the belt unit 300 to move into the base unit 400. However, when the user attempts to withdraw the belt unit 300 from the base unit 400, the locking unit 500 cannot pivot about the first fastening pin 423, and thus the first and

second teeth portions

340 and 540 remain fastened to each other, so that the belt unit 300 cannot move outward from the base unit 400. It should be noted that the belt unit 300 may be moved outward from the base unit 400 while pivoting the belt unit 300 using the operating unit 600 to release the fastening of the first and

second teeth

340 and 540. As will be described in detail below.

Meanwhile, an elastic member 510 may be disposed between the base unit 400 and the locking unit 500 to apply an elastic force required to push the second tooth 540 toward the belt unit 300. Here, the elastic member 510 may be, for example, a torsion spring. At this time, the torsion spring 510 may be located in a recess 530 (see fig. 2) such that the first fastening pin 423 is inserted through the torsion spring 510, wherein the recess 530 is formed in a side surface of the locking unit 500 facing each of the sidewalls 420. One end of the torsion spring 510 may be clamped by the elastic support portion 440 of the base unit 400 and the other end of the torsion spring 510 may be clamped by one end of the recess 530 of the locking unit 500. As such, the torsion spring 510 may provide an elastic force to pivot the locking unit 500 such that the second tooth 540 is pushed toward the belt unit 300.

Meanwhile, fig. 5A to 5C are plan views illustrating an initial process of fastening a helmet buckle according to an embodiment of the present invention. As shown in fig. 5A to 5C, the first recess 342 of the teeth and recesses of the first tooth portion 340, which first meets the teeth and recesses of the second tooth portion 540 when the belt unit 300 is introduced into the base unit 400, may have a width W1, and the width W1 may be smaller than the width W2 of the first tooth 544 of the teeth and recesses of the second tooth portion 540, which first meets the teeth and recesses of the first tooth portion 340 when the belt unit 300 is introduced into the base unit 400 (W1< W2). Further, the width W1 of the first recess 342 may be equal to or greater than the width W3 of the second tooth 545 in the teeth and recesses of the second tooth 540, which second tooth meets the teeth and recesses of the first tooth 340 when the belt unit 300 is introduced into the base unit 400 (W1 — W3 or W1> W3). That is, the first recess 342 located at the most forward position of the first tooth portion 340 may have a width W1(W1< W2) smaller than the width W2 of the first tooth 544 located at the most forward position of the second tooth portion 430, may have a width W1(W1 ═ W3) equal to the width W3 of the second tooth 545 next to the first tooth 544, or may have a width W1(W1> W3) larger than the width W3 of the second tooth 545. With this configuration, the first tooth 544 is not engaged with the first recess 342 (see fig. 5B), but the second tooth 545 is engaged with the first recess 342 (see fig. 5C). Accordingly, since the belt unit 300 and the locking unit 500 are fastened to each other using two recesses and two teeth (see fig. 5C) instead of using only one recess and one tooth (see fig. 5B), it is possible to achieve firm fastening between the belt unit 300 and the locking unit 500. At this time, various configurations may be employed to achieve that the width of the first recess 342 is smaller than the width of the first tooth 544 (W1< W2), the width of the first recess 342 is equal to the width of the second tooth 545 (W1 ═ W3), or the width of the first recess 342 is larger than the width of the second tooth 545 (W1> W3). For example, as shown in fig. 5, in order to limit the width W1 of the first recess 342, protrusions 342a may protrude from both widthwise ends of the first recess 342. At this time, the distance W1 between the protrusions 342a may be smaller than the width W2 of the first teeth 544, or may be equal to or larger than the width W3 of the second teeth 545. It should be noted that this configuration is given by way of example, and the scope of the present invention should not be limited to this configuration.

The operating unit 600 (see fig. 1) serves to pivot the locking unit 500 to release the engagement of the first and

second tooth portions

340 and 540. As described above, the operation unit 600 is fastened to the other side of the base unit 400, for example, via the second fastening pin 427 and the guide protrusion 629, to be linearly moved toward the locking unit 500. Here, since the operating unit 600 is disposed to be spaced apart from the bottom wall 410 of the base unit 400 (see fig. 4A), the belt unit 300 may be introduced or retracted through a gap between the bottom wall 410 of the base unit 400 and the operating unit 600. Further, as shown in fig. 4B, when the operating unit 600 moves toward the locking unit 500 to apply pressure to the locking unit 500, the second tooth 540 of the locking unit 500 may pivot the locking unit 500 away from the belt unit 300. Specifically, the operation unit 600 and the locking unit 500 may be arranged in substantially the same plane. Here, a first slope 550 may be formed on an end of the locking unit 500 facing the operating unit 600, and a second slope 650 may be formed on an end of the operating unit 600 facing the locking unit 500 to correspond to the first slope 550. At this time, the first slope 550 of the locking unit 500 may face the bottom wall 410 of the base unit 400, and the second slope 650 of the operating unit 600 may face a direction opposite to the bottom wall 410 of the base unit 400. In this way, when the user pushes the operating unit 600 to linearly move toward the locking unit 500, the second slope 650 of the operating unit 600 slides on the first slope 550 of the locking unit 500, thereby pushing one surface (i.e., the lower surface having the second teeth 540) of the locking unit 500, thereby pivoting the locking unit 500 away from the band unit 300. When the locking unit 500 pivots away from the belt unit 300 as described above, the first tooth portions 340 of the belt unit 300 are disengaged from the second tooth portions 540 of the locking unit 500, and thus the belt unit 300 can freely move. However, when the user no longer applies pressure to the operating unit 600, as shown in fig. 4A, the locking unit 500 pivots closer to the belt unit 300 due to the elastic force provided to the locking unit 500, and thus the first slope 550 of the locking unit 500 pushes the second slope 650 of the operating unit 600, so that the operating unit 600 can linearly move in the opposite direction to the locking unit 500. When the locking unit 500 pivots closer to the belt unit 300 as described above, the first tooth portion 340 of the belt unit 300 and the second tooth portion 540 of the locking unit 500 are engaged with each other again, so that the belt unit 300 can be fixed.

As described above, the helmet buckle 100 according to the present embodiment may be of a push type such that a user simply releases the fastening of the locking unit 500 and the band unit 300 by applying pressure to the operating unit 600, and thus may advantageously allow the user who is riding a motorcycle or enjoying skiing to easily operate the buckle 100.

Fig. 6 to 10 are sectional views illustrating operations performed on the helmet buckle according to the embodiment of the present invention. The operation of the helmet buckle 100 according to an embodiment of the present invention will now be described with reference to fig. 6 to 10.

First, fig. 6 to 8 illustrate a process of introducing the belt unit 300 to the base unit 400. When the introduction portion 313 of the belt unit 300 passes through the gap between the bottom wall 410 of the base unit 400 and the elastic support portion 440 to be inserted into the gap between the bottom wall 410 of the base unit 400 and the locking unit 500 and the gap between the bottom wall 410 of the base unit 400 and the operation unit 600, the second tooth portion 540 of the locking unit 500 is engaged with the first tooth portion 340 formed on the body 310 of the belt unit 300, thereby moving the belt unit 300 into the base unit 400. At this time, when the first teeth 340 of the belt unit 300 passes over the second teeth 540 of the locking unit 500, the locking unit 500 pivots about the first fastening pin 423. More specifically, the locking unit 500 may be repeatedly pivoted away from the belt unit 300 (see fig. 7) and then may be pivoted toward the belt unit 300 by the elastic force of the elastic member 510 (see fig. 8).

Next, fig. 9 and 10 illustrate a process of retracting the belt unit 300 from the base unit 400. As shown in fig. 9, when the user pushes the operating unit 600 toward the locking unit 500, the operating unit 600 is linearly moved toward the locking unit 500 such that the second slope 650 of the operating unit 600 slides on the first slope 550 of the locking unit 500, thereby pushing one surface (i.e., the lower surface having the second teeth 540) of the locking unit 500, so that the locking unit 500 can be pivoted away from the belt unit 300 about the first fastening pin 423. When the locking unit 500 pivots as described above, the fastening between the first tooth portion 340 of the belt unit 300 and the second tooth portion 540 of the locking unit 500 may be released. Thereafter, as shown in fig. 10, when the belt unit 300 is pushed, the belt unit 300 may sequentially pass through the gap between the bottom wall 410 of the base unit 400 and the operating unit 600 and the gap between the bottom wall 410 of the base unit 400 and the locking unit 500, thereby being retracted through the gap between the bottom wall 410 of the base unit 400 and the elastic support portion 440.

Fig. 11 is a side view illustrating a helmet buckle according to another embodiment of the present invention. As shown in fig. 11, a helmet buckle according to another embodiment of the present invention, which is denoted by reference numeral 200, may include a guide member 700 provided on the base unit 400. Here, the guide member 700 extends from an end of the bottom wall 410 of the base unit 400, into which the belt unit 300 is introduced. At this time, the guide member 700 is inclined from one end of the bottom wall 410 in a direction (i.e., downward) opposite to a direction (upward direction) in which the side wall 420 extends from the bottom wall 410. That is, the guide member 700 may extend so as to be inclined downward from one end of the bottom wall 410. By providing the guide member 700, the user can more easily introduce the belt unit 300 into the base unit 400.

As apparent from the above description, the present invention may provide a push-type helmet buckle in which a locking unit pivots when a user pushes an operating unit, so that fastening of the locking unit and a band unit can be released. This advantageously allows the user to easily operate the clasp while riding a motorcycle or enjoying sports (e.g., skiing).

Although the embodiments of the present invention have been described in detail, it is apparent that the above description is given only for the purpose of specifically describing the present invention, and the present invention is not limited thereto, and those skilled in the art can make modifications or improvements thereto within the scope of the present invention.

Simple changes and modifications of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

Claims

1. A headgear clasp, comprising:

a belt unit having a first tooth comprising one or more teeth and a recess;

a base unit for guiding sliding of the belt unit when the belt unit is introduced or retracted;

a locking unit pivotably fastened to both sides of the base unit at one end of the base unit and having a second tooth portion on one surface thereof facing the belt unit, the second tooth portion including one or more teeth and recesses to correspond to the first tooth portion, the second tooth portion being pushed toward the belt unit; and

an operating unit fastened to both sides of the base unit at the other end thereof to be movable toward the locking unit, the operating unit for pivoting the locking unit such that the second tooth portion moves away from the belt unit when the operating unit moves toward the locking unit to apply pressure to the locking unit;

wherein the locking unit has a first slope on an end thereof facing the operating unit,

wherein the operating unit has a second slope on an end thereof facing the locking unit, an

Wherein, when the operation unit moves toward the locking unit, the second slope slides on the first slope, thereby pushing one surface of the locking unit so that the locking unit pivots;

wherein the base unit comprises:

a bottom wall extending in a plate shape to correspond to the belt unit; and

a pair of side walls extending from opposite sides of the bottom wall to face each other, the locking unit being pivotably secured to one end of each side wall, and the operating unit being secured to the other end of the side wall, and the operating unit being movable toward or away from the locking unit with respect to the base unit;

wherein the side wall has a first fastening hole formed in one end thereof, the locking unit has a second fastening hole formed at a position therein corresponding to the first fastening hole, and a first fastening pin is inserted through the first and second fastening holes;

wherein the side wall has a third fastening hole formed in the other end thereof, the operation unit has a fourth fastening hole formed therein at a position corresponding to the third fastening hole, and a second fastening pin is inserted through the third and fourth fastening holes, and

wherein a width of the fourth fastening hole in a given direction is larger than a diameter of the second fastening pin to allow the operation unit to be linearly movable relative to the base unit toward the locking unit.

2. The clasp of claim 1, wherein a first one of the teeth and recesses of the first tooth portion that first meets the teeth and recesses of the second tooth portion when the band unit is introduced into the base unit has a width that is less than a width of a first one of the teeth and recesses of the second tooth portion that first meets the teeth and recesses of the first tooth portion when the band unit is introduced into the base unit, and has a width that is equal to or greater than a width of a second one of the teeth and recesses of the second tooth portion that second meets the teeth and recesses of the first tooth portion when the band unit is introduced into the base unit.

3. The buckle of claim 1, further comprising an elastic member disposed between said base unit and said locking unit, said elastic member for providing an elastic force to allow said second tooth portion to be pushed toward said belt unit.

4. The clasp of claim 3, wherein the resilient member is a torsion spring, and

wherein one end of the torsion spring is caught by the elastic support portion of the base unit, and the other end of the torsion spring is caught by the locking unit.

5. The buckle according to claim 1, wherein said side wall has a guide groove formed in the other end thereof to be recessed toward said locking unit, and

wherein the operation unit has a guide protrusion inserted into the guide groove to move along the guide groove.

6. The buckle of claim 1, wherein said base unit further comprises a guide member extending from an end of said bottom wall into which said strap unit is introduced, and

wherein the guide member is inclined from the one end of the bottom wall in a direction opposite to a direction in which the side wall extends from the bottom wall.