BAND LENGTH-ADJUSTABLE HOOK-FIXING TYPE BELT BUCKLE

Abstract

A band length-adjustable hook-fixing type belt buckle according to the present disclosure comprises a band having a plurality of fixing holes formed in a surface thereof and configured to extend in a longitudinal direction; a pushing member provided at one end of the band and including a pushing portion fixing part extending in a width direction of the band and having a fitting groove perforated therein along the extension direction, a spring inserted into the fitting groove to give elasticity, and pushing portions provided at both ends of the fitting groove to be pushed from an inner side of the fitting groove to an outer side by means of the spring; and a buckle provided at the other end of the band and having a slide groove perforated therein and extending along the longitudinal direction so that the pushing portion slides therein.

Description

TECHNICAL FIELD

[0001] The present application claims priority to Korean Utility Model Application No. 20-2018-0001277 filed on Mar. 23, 2018 in the Republic of Korea, the disclosures of which are incorporated herein by reference.

[0002] The present disclosure relates to a belt buckle that allows detailed length adjustment and fixation of a belt string. More specifically, the present disclosure relates to a band length-adjustable hook-fixing type belt buckle for relieving the inconvenience of a belt that is adjusted using only a hook and fixing holes, which have been used for thousands of years, and also for freely adjusting the length of a belt string according to body change of a user and preventing loosening of the belt string.

BACKGROUND ART

[0003] Generally, the conventional belt applies a pressure at a right angle to the vertical direction along which the stomach and intestine move, and thus disturbs the movement of the digestive system. Since a user wearing a belt feels the pain by compression applied to the abdomen when the wearer sits down while standing or when the abdomen is bloated due to eating, the user is reluctant to wear the belt and uses suspenders instead. If pressure is applied to the abdomen as described above, the user wearing the belt must loosen the belt and then adjust the length of the belt again to relieve the pressure.

[0004] In other words, since the conventional belt is not structurally stretched, if a feeling of pressure is applied to the abdomen after eating (especially after overeating) due to a body posture where the abdomen is bloated or the abdomen is pressed, the user wearing the belt must manually loosen the belt in order to solve this problem, which reduces the convenience of the user.

[0005] Therefore, various belt buckles that may solve this problem have been developed.

[0006] First, Korean Utility Model Registration No. 20-0470117, entitled `a length adjustable belt buckle`, discloses a length adjustable belt buckle in which a hook or protrusion used in the existing buckle, namely a hook-type buckle, is coupled to a sliding-type buckle having a saw-teeth shape for pressing and fixing a band with saw-teeth to solve the problems of the hook-type buckle and the sliding-type buckle simultaneously, so that a user wearing the buckle may adjust the length of the belt to adapt to the change in the body, and at the same time, the belt is prevented from being naturally loosened, thereby allowing the wearer to adjust the length according to the situation and preventing the buckle from being loosened.

[0007] Even though the above buckle allows the length of the belt to be adjusted to adapt to the change of the body of the wearer, the buckle may not be finely adjusted because the buckle is movable only to a designated position, so it is difficult for the wearer to properly adjust the belt in a customized form.

[0008] In addition, Korean Utility Model Registration No. 20-0292972, entitled `a variable buckle`, discloses a variable buckle whose length is adjustable according to the change in an abdominal pressure of a wearer, which may be used conveniently. For this purpose, the buckle adjustable according to the change in abdominal pressure of a wearer includes a waist band and a buckle. Here, a fixed clamp 100 to which one end of the waist band is fixed and a movable clamp 200 into which the other end of the waist band is inserted to be adjusted suitable for the size of the waist are coupled by a connection bar 150 formed from the fixed clamp, and an elastic member 151 is inserted into the connection bar so that the fixed clamp 100 moves along the connection bar 150 according to the abdominal pressure of the wearer. Thus, the length of the variable buckle is automatically adjusted according to the change of the abdomen before/after meals.

[0009] In this configuration, since the buckle must be configured doubly to extend the belt string, the buckle production cost is increased and thus the thickness of the buckle is unnecessarily increased.

[0010] Therefore, in order to solve the above problems, there is a need to develop a band length-adjustable hook-fixing type belt buckle, which may allow the length of the belt string to be freely adjusted according to the change of the wearer body and also prevent the belt string from loosening.

DISCLOSURE

Technical Problem

[0011] The present disclosure is designed to solve the problems of the related art, and therefore the present disclosure is directed to adjusting the length of a band inserted into a buckle through a simple pushing operation.

[0012] The present disclosure is also directed to securely fixing the band inserted into the buckle.

[0013] The present disclosure is also directed to providing a physical coupling configuration that prevents the band fixed to the buckle from loosening by continuously maintaining a fixed position of the band.

[0014] The present disclosure is also directed to providing a configuration that allows the band to be easily detached from the buckle when releasing the fixed state.

Technical Solution

[0015] In one aspect of the present disclosure, there is provided a band length-adjustable hook-fixing type belt buckle, comprising: a band having a plurality of fixing holes formed in a surface thereof and configured to extend in a longitudinal direction; a pushing member provided at one end of the band and including a pushing portion fixing part extending in a width direction of the band and having a fitting groove perforated therein along the extension direction, a spring inserted into the fitting groove to give elasticity, and pushing portions provided at both ends of the fitting groove to be pushed from an inner side of the fitting groove to an outer side by means of the spring; and a buckle provided at the other end of the band and having a slide groove perforated therein and extending along the longitudinal direction so that the pushing portion slides therein.

[0016] In addition, the buckle includes a base portion having a hook fastened to the fixing hole, a pair of sidewall portions respectively formed upright at both widthwise sides of the base portion, and a cover portion supported by the pair of sidewall portions to form a band insert space between the cover portion and the base portion so that the band is inserted therein, and the slide groove extending along the longitudinal direction is formed at the sidewall portion.

[0017] Moreover, the belt buckle may include a band extension between the other end of the band and the buckle, the band extension including: a pair of fixing portions configured to respectively contact an upper surface and a lower surface of the band and fixed to the band by means of a fastener; and a pushing fixing portion configured to connect ends of the pair of fixing portions and form a placing space between the fixing portion and the other end of the band so that the pushing portion fixing part is inserted therein.

[0018] Further, the buckle may be configured to be divided into a first buckle piece located above and a second buckle piece located below based on the slide groove at the sidewall portion.

Advantageous Effects

[0019] The band length-adjustable hook-fixing type belt buckle according to the present disclosure provides:

[0020] 1) a configuration that may adjust the length of a band inserted into a buckle through a simple pushing operation,

[0021] 2) a configuration that may securely fix the band inserted into the buckle,

[0022] 3) a physical coupling configuration that allows the band to maintain its state fixed to the buckle, and

[0023] 4) a configuration that allows the band to be easily detached from the buckle when releasing the fixed state in spite of the presence of the above configurations.

DESCRIPTION OF DRAWINGS

[0024] FIG. 1 is a perspective view showing a basic configuration of a belt according to the present disclosure.

[0025] FIG. 2 is a perspective view showing a basic configuration of a buckle and a pushing member according to the present disclosure.

[0026] FIG. 3 is an exploded perspective view showing a pushing member according to the present disclosure.

[0027] FIG. 4 is a perspective view showing an embodiment of the buckle and the pushing member according to the present disclosure.

[0028] FIG. 5 is a perspective view for illustrating an operation process of the pushing member according to the present disclosure.

[0029] FIG. 6 is an exploded perspective view showing another embodiment of the pushing member according to the present disclosure.

BEST MODE

[0030] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Prior to the description, it should be understood that the terms used in the specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present disclosure on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Therefore, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the disclosure, so it should be understood that other equivalents and modifications could be made thereto without departing from the scope of the disclosure.

[0031] Hereinafter, a preferred embodiment of the present disclosure will be described in detail with reference to the accompanying drawings. The accompanying drawings are not depicted by scale, and like reference signs in each drawing refer to like elements.

[0032] FIG. 1 is a perspective view showing a basic configuration of a belt according to the present disclosure.

[0033] Referring to FIG. 1, a belt buckle 300 of the present disclosure extends along a longitudinal direction, and basically includes a band 100 having a plurality of fixing holes perforated at predetermined intervals along the extension direction, and a buckle 300 mounted at one end of the band 100 and having a hook 331 fastened to the fixing hole and a hooking ring to which a remaining region of the band 100 passing therethrough and caught by the hook 331 is fixed.

[0034] The band 100 may be made of vinyl material, synthetic resin, leather, cloth, or the like and is characterized by extending with a sufficient length and width to fix the pants by surrounding the waist.

[0035] Further, the buckle 300 is provided at one end of the band 100. The fixing holes formed in the band 100 may be provided over the entire length of the band 100 at regular intervals along the longitudinal direction. However, commonly, 5 to 10 fixing holes formed at one end of the band 100, and the buckle 300 is generally provided at the other end of the band 100, which is opposite to the end where the fixing holes are formed.

[0036] The buckle 300 includes a hook 331. The hook 331 is inserted into one of the fixing holes and fixed thereto. The hook 331 and the fixing hole are used to fix the band 100 by a suitable length after the band 100 is put around the waist of a user.

[0037] In addition, the buckle 300 may further include a hooking ring (not shown) in addition to the hook 331. The hooking ring is configured such that a remaining region of the band 100 is inserted and fixed therein after the hook 331 is inserted into one of the fixing holes of the band 100, and gives a so-called harnessing function.

[0038] FIG. 2 is a perspective view showing a basic configuration of a buckle 300 and a pushing member 200 according to the present disclosure.

[0039] The configuration of the buckle 300 will be described in more detail with reference to FIG. 2.

[0040] First, the buckle 300 basically includes a band portion 310, a pair of sidewall portions 320 formed upright at both widthwise sides of the base portion 310, and a cover portion supported by the sidewall portions 320 to form a band insert space between the cover portion and the base portion 310 so that the band 100 is inserted therein. The sidewall portion 320 further has a slide groove 321 extending therethrough along the longitudinal direction, and a hook 331 (and a hooking ring) is provided at one side of the cover portion.

[0041] The buckle 300 is generally shaped like a hexahedron at which front and rear surfaces are perforated, except for the hook 331 (and the hooking ring). Most preferably, the band 100 is inserted through at least one of the perforated surfaces, and the hook 331 is located at a side opposite thereto.

[0042] In addition, the buckle 300 may be configured to be divided into at least two buckle 300 pieces. Here, the buckle 300 pieces may include a first buckle piece 301 located above and a second buckle piece 302 located below. At this time, the sidewall portion 320 may be configured to be separated up and down, and further, a separate fastener (not shown) for coupling the buckle 300 pieces and a fastener coupling groove (not shown) to which the fastener is coupled may be further provided so that the two buckle 300 pieces may be easily coupled.

[0043] Moreover, both sidewall portions 320 of the buckle 300 may respectively have a slide groove 321 extending therethrough in the longitudinal direction. Each pushing member 200, explained later, may be inserted into the slide groove 321 to move along the slide groove 321.

[0044] FIG. 3 is an exploded perspective view showing the pushing member 200 according to the present disclosure, and FIG. 4 is a perspective view showing an embodiment of the buckle 300 and the pushing member 200 according to the present disclosure.

[0045] The pushing member 200 will be described with reference to FIGS. 3 and 4 as follows.

[0046] The pushing member 200 is used when the band 100 is fixed to the buckle 300 as described above, and one end of the band 100 must be fixed to the buckle 300. However, in the case of an existing buckle 300, once a part of the buckle 300 for fixing the band 100 is coupled once by saw-tooth coupling or male-female coupling, the existing buckle 300 is not easily taken off. In other words, once the band 100 is fixed to the buckle 300, the length of the entire band 100 is fixed. However, the fixing holes provided in the band 100 are perforated at regular intervals, and the interval between the existing fixing holes is usually 2 cm to 1 inch, which is relatively wide, so it is undesirable to change the length of the band 100 in a range smaller than the interval between the existing fixing holes described above according to the degree of expansion of the abdomen just by changing the location of the fixing hole.

[0047] Therefore, in order to finely adjust the length of the band 100, the following configuration should be further included in the pushing member 200.

[0048] First, a band extension 230 may be further provided at one end of the band 100. The band extension 230 is inserted into the end of the band 100 and includes two fixing portions 231 and a pushing fixing portion 232 that connects ends of the fixing portions 231 in a `.OR right.` shape. Here, the band extension 230 is fixed by a separate locking means (or, a fastener) in a state where the end of the band 100 is inserted into an inlet of the `.OR right.` shape. Therefore, a placing space may be further formed inside the `.OR right.` shape except for the fixed portion. The pushing portion fixing part 210 may be inserted into the placing space, and in some cases, a bar-shaped extension fixing part (not shown) may be located separately from the pushing portion fixing part 210. The extension fixing part is an extended configuration for inserting the pushing portion fixing part 210 into the seating space, and both ends of the extension fixing part may be coupled to both ends of the pushing portion fixing part 210 again. At this time, the pushing portion fixing part 210 may be formed to protrude toward the front of the band 100 when compared to the extension fixing part, and the pushing portion fixing part 210 extends by a shorter length than the extension fixing part.

[0049] However, as seen in the drawings, since both the band 100 and the pushing portion fixing part 210 must be configured to be inserted into the band insert space of the buckle 300, the width or length of each component should be adjusted in consideration of this configuration. The drawings are depicted based on the configuration that is most suitable and easy to manufacture and use. Therefore, the present disclosure should be implemented based on the drawings as much as possible, and if there are any necessary changes, it would be desirable to utilize such changes.

[0050] Here, the pushing portion fixing part 210 may have a fitting groove 250 formed therethrough to connect both ends thereof along the width direction, and are fitted to inlets at both sides of the fitting groove 250, respectively. For this, two pushing portions 220 are provided.

[0051] As seen in the drawing, the pushing portion 220 has a structure similar to a screw or a nail, and may include a pillar 221 inserted into the inlet of the fitting groove 250 described above, and a head 222 provided at the end of this pillar 221 with a greater diameter than the pillar 221 and configured to extend greater than the diameter of the inlet of the fitting groove 250.

[0052] The pillar 221 is inserted into the fitting groove 250, and the extended length of the pillar 221 is preferably less than half of the length of the fitting groove 250 (because one pillar must be inserted into a front side and a rear side of the fitting groove 250, respectively). Therefore, the pillars 221 of the pushing portion 220 are inserted through both inlets of the fitting groove 250, and a spring 240 may be further embedded in the fitting groove 250 to elastically support the two pillars 221. At this time, the spring 240 preferably has a cylindrical shape into which the pillar 221 is inserted, and an end of the spring 240 has a smaller diameter than the head 222 so that the spring 240 may be caught and fixed by the head 222. Therefore, by means of the springs 240, both of the pushing portions 220 receive a force of protruding out of the fitting groove 250.

[0053] At this time, seeing the configuration of the head 222 again, the head 222 may include two recess parts 223 recessed inward along an outer circumference thereof and a fixing projection 224 protrusively extending at a side surface of the recess part 223 toward the pillar 221.

[0054] The fixing projection 224 may be used in correspondence with the slide groove 321 described above. For this, the slide groove 321 will be described again with reference to FIG. 5 as follows.

[0055] FIG. 5 is a perspective view for illustrating an operation process of the pushing member 200 according to the present disclosure.

[0056] First, seeing the structure of the slide groove 321, the slide groove 321 is formed to be perforated in a straight line along the longitudinal direction of the sidewall portion 320, and the slide groove 321 has a plurality of protrusions 322 protrusively extending at regular intervals from a location of the slide groove 321 at the sidewall portion 320 to a boundary with the base portion 310 or a boundary with the cover portion 330. The fixing projection 224, explained above, is inserted between the protrusions 322. Therefore, when the pushing portion 220 is moved by the spring 240, the fixing projection 224 of the pushing portion 220 is simultaneously pushed toward the sidewall portion 320 at which the protrusions 322 are formed, and as a result, the fixing projection 224 may be fitted into any one of the spaces formed between the plurality of protrusions 322.

[0057] Therefore, if a user presses the head 222 of the pushing member 200 protruding from the buckle 300 through the slide groove 321 and pulls out the fixing projection 224 of the pushing portion 220 from the space between the protrusions 322, the pushing member 200 may be moved. Therefore, if the pushing member 200 is pushed or pulled, the length of the band 100 is changed. If the user adjusts the length through the above operation and then inserts the fixing projection 224 of the pushing portion 220 between any space between the protrusions 322 again, the location of the pushing member 200 is fixed, thereby allowing the overall length of the band 100 to be adjusted.

[0058] In addition, both ends of the slide groove 321 may be configured to be rounded. Due to the rounded shape, the slide groove 321 has no sharp edge. Thus, even if the pushing portion 220 moves to an extreme end of the slide groove 321, it is possible to prevent the pushing portion 220 from being damaged.

[0059] In addition to the basic structure of the buckle 300 as above, the operation and fixation of the buckle 300 will be described as follows.

[0060] First, as described above, the buckle 300 may be divided into two pieces, namely the first buckle piece 301 and the second buckle piece 302.

[0061] Here, in the structure for connecting the buckle 300 pieces, basically, a fastener coupling groove (not shown) is formed to cross both the buckle 300 pieces, and a thread is provided along an inner circumference of the fastener coupling groove so that the fastener (not shown) is coupled to the groove to fix the two pieces.

[0062] However, at surfaces of the sidewall portions 320 of the first and second buckle 300 pieces that contact each other, first projections 303 eccentrically protruding toward the band insert space and second projections 304 eccentrically protruding opposite to the band insert space are provided so that any one of the first and second protrusions intersect with each other. As seen in the drawings, if the first projection 303 is formed at the first buckle piece 301, the second projection 304 is formed at the second buckle piece 302. Alternatively, if the second projection 304 is formed at the first buckle piece 301, the first projection 303 is formed at the second buckle piece 302. Therefore, since the first projection 303 or second projection 304 formed at the first buckle piece 301 and the second projection 304 or the first projection 303 formed at the second buckle piece 302 are coupled to intersect with each other, the two buckle 300 pieces may have a more robust coupling structure.

[0063] Furthermore, the base portion 310 and the cover portion 330 may further include pushing portion guides 350 protrusively extending in the longitudinal direction at a location spaced apart from the sidewall portion 320 inward by a predetermined interval, and at this time, the pushing portion fixing part 210 may further include an extension fixing part 211 fitted into the space between the pushing portion guides 350.

[0064] As seen in the drawings, this configuration allows the extension fixing part 211 to be moved between the pushing portion guides 350, and further, the pushing portion guide 350 may also have a structure capable of preventing the head 222 of the pushing member 200 from excessively moving into the buckle 300 as the head 222 is caught by the pushing portion guide 350.

[0065] In addition, a tapered inclined section 351 may be provided at an end of the inlet of the pushing portion guide 350 at which the pushing member 200 is introduced to the buckle 300. Accordingly, the pushing portion fixing part 210 may further have a guide section (not shown) formed by recessing a part thereof that comes into contact with the inclined section 351. Thus, by means of the guide section (not shown), the pushing portion fixing part 210 may have a structure that slows the wear or the like occurring when the pushing portion fixing part 210 contacts the pushing portion guide 350.

[0066] FIG. 6 is an exploded perspective view showing another embodiment of the pushing member 200 according to the present disclosure.

[0067] Further, the configuration of the pillar 221 in the pushing portion 220 will be described in more detail as follows.

[0068] First, the pillar 221 is classified into first, second and third regions along the extension direction (these regions are named in the order close to the inlet 212 of a fitting groove 250 into which the pillar 221 is inserted), and may include a friction ring 225 surrounding an outer circumference of the first region and a stopper ring 226 surrounding an outer circumference of the third region. In particular, as explained later, the second region may further have a pillar recess 227 recessed inward so that a stopper projection 213 for fixing the stopper ring 226 located at the third region may be easily moved (because the stopper projection 213 should not affect other components as much as possible except for being caught by the stopper ring 226).

[0069] Here, the friction ring 225 may include a first structure layer 228 made of a flexible material and a second structure layer 229 stacked on the first structure layer 228 and coated with a material having a higher friction coefficient than the other region of the pillar 221. At this time, when the first structure layer 228 is formed, the entire diameter of the first structure layer 228 is made to be almost the same as the diameter of the fitting groove 250, so that the second structure layer 229 is pushed to come into contact with the inner circumference of the fitting groove 250 by means of the diameter and elasticity of the first structure layer 228. At this time, since the second structure layer 229 has a large friction coefficient, the second structure layer 229 may be used to fix the location of the pillar 221 in contact with the inner circumference of the fitting groove 250.

[0070] Further, as described above, the stopper ring 226 may be configured to have a flat surface toward the inlet 212 of the fitting groove 250, and at this time, a stopper projection 213 may be provided at a location spaced apart from the inlet 212 of the fitting groove 250 by a predetermined interval so that the flat surface of the stopper ring 226 is caught and fixed by the stopper projection 213. As seen in the drawings, the friction ring 225 and the second region, which are parts other than the stopper ring 226, may pass without being caught by the stopper projection 213 (the friction ring 225 may easily pass due to its elasticity), the stopper ring 226 located at the third region is caught by the stopper projection 213, thereby giving a configuration that prevents the pillar 221 from being separated from the fitting groove 250 any more.

[0071] As described above, the band length-adjustable hook-fixing type belt buckle according to the present disclosure is expressed in the description and drawings, but this is just an example, and the idea of the present disclosure is not limited to the description and drawings, and various changes and modifications can be made within the scope of the technical idea of the present disclosure.

[0072] In addition, since various substitutions, modifications and changes can be made within the scope of the technical idea of the present disclosure by those skilled in the art, the present disclosure is not limited by the above embodiments and the attached drawings.

Claims

1. A band length-adjustable hook-fixing type belt buckle, comprising: a band having a plurality of fixing holes formed in a surface thereof and configured to extend in a longitudinal direction; a pushing member provided at one end of the band and including a pushing portion fixing part extending in a width direction of the band and having a fitting groove perforated therein along the extension direction, a spring inserted into the fitting groove to give elasticity, and pushing portions provided at both ends of the fitting groove to be pushed from an inner side of the fitting groove to an outer side by means of the spring; and a buckle provided at the other end of the band and having a slide groove perforated therein and extending along the longitudinal direction so that the pushing portion slides therein, wherein the buckle includes a base portion having a hook fastened to the fixing hole, a pair of sidewall portions respectively formed upright at both widthwise sides of the base portion, and a cover portion supported by the pair of sidewall portions to form a band insert space between the cover portion and the base portion so that the band is inserted therein, wherein the slide groove extending along the longitudinal direction is formed at the sidewall portion, wherein the sidewall portion has a plurality of protrusions protrusively extending at regular intervals along the longitudinal direction from a location of the slide groove toward a boundary of the base portion and the cover portion, and wherein the pushing member includes a fixing projection protrusively extending with a width corresponding to the interval between the protrusions and inserted between the protrusions.

2. The band length-adjustable hook-fixing type belt buckle according to claim 1, wherein the belt buckle includes a band extension between the other end of the band and the buckle, the band extension including: a pair of fixing portions configured to respectively contact an upper surface and a lower surface of the band and fixed to the band by means of a fastener; and a pushing fixing portion configured to connect ends of the pair of fixing portions and form a placing space between the fixing portion and the other end of the band so that the pushing portion fixing part is inserted therein.

3. The band length-adjustable hook-fixing type belt buckle according to claim 1, wherein the buckle is configured to be divided into a first buckle piece located above and a second buckle piece located below based on the slide groove at the sidewall portion.

4. The band length-adjustable hook-fixing type belt buckle according to claim 3, wherein at surfaces where the sidewall portions of the first and second buckle pieces are in contact, first projections eccentrically protruding toward the band insert space and second projections eccentrically protruding opposite to the band insert space are provided such that any one of the first and second protrusions intersect with each other.

5. The band length-adjustable hook-fixing type belt buckle according to claim 1, wherein both ends of the slide groove are rounded.

6. The band length-adjustable hook-fixing type belt buckle according to claim 1, wherein the pushing portion includes: a pillar inserted into the fitting groove to move by means of the spring; and a head having a greater diameter than the pillar to protrude out of the fitting groove and having a recess part formed by recessing a part of an outer circumference thereof, wherein the recess part is fitted into the slide groove to slide therein.

7. The band length-adjustable hook-fixing type belt buckle according to claim 6, wherein the base portion and the cover portion include pushing portion guides protrusively extending along the longitudinal direction at locations spaced apart from the sidewall portion inward by a predetermined interval, and wherein the pushing portion fixing part further includes an extension fixing part fitted into a space between the pushing portion guides.

8. The band length-adjustable hook-fixing type belt buckle according to claim 7, wherein the pushing portion guide has a tapered inclined section provided at an inlet end thereof at which the pushing member is inserted into the buckle, and wherein the pushing portion fixing part has a guide section formed by recessing a part thereof, which contacts the inclined section, inward.

9. The band length-adjustable hook-fixing type belt buckle according to claim 6, wherein the pillar is classified into first, second and third regions along the extension direction, wherein the pillar includes: a friction ring configured to surround an outer circumference of the first region; and a stopper ring configured to surround an outer circumference of the third region.

10. The band length-adjustable hook-fixing type belt buckle according to claim 9, wherein the friction ring includes: a first structure layer made of a flexible material; a second structure layer stacked on the first structure layer and coated with a material having a greater friction coefficient than the other region of the pillar, wherein the first structure layer presses the second structure layer so that the second structure layer comes into contact with an inner circumference of the fitting groove.

11. The band length-adjustable hook-fixing type belt buckle according to claim 9, wherein the stopper ring has a flat surface formed toward an inlet of the fitting groove, and wherein a stopper projection is provided at a location spaced apart from the inlet of the fitting groove by a predetermined interval so that the flat surface of the stopper ring is caught by and fixed by the stopper projection.