JPH1181020A - Buckle for stretchable belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a belt to tighten an object with a constant force at all times even if the periphery of a worn site is stretched/contracted. SOLUTION: In a stretchable belt composed of a band and a buckle with function to stretch/contract, an axial core 18a projecting inside the spring case 3a of the buckle is revolvably mounted with a constant force spring 5 wound around a reel 19, and the constant force spring 5 is connected to an engagement body 8a with an engagement pin 6a on the upper part; the holding hole 25a of an upper cap 2a is revolvably fitted with the band setting part 23a of the spring case 3a; one end of the band is inserted into a band fixing part 23a followed by fitting and fixing a holding projection and a holding recess 17a with each other to assemble the spring case 3a and the upper cap 2a and the engagement pin 6a is slidably projecting out through the guide hole 4a of the upper cap 2a and the band is firmly held on the buckle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buckle for an elastic belt, which relates to a buckle for a belt fastened to an object to be mounted. The present invention relates to a buckle of a telescopic belt that expands and contracts in accordance with a buckle.

[0002]

2. Description of the Related Art In order to provide a telescopic function, a conventional telescopic belt of this type uses a rubber for part or all of a band, or has a buckle equipped with a coil spring or a leaf spring. I have. (June 55-142
(See No. 47)

[0003]

These conventional elastic belts use elastic rubber, coil springs, or leaf springs in order to achieve the elastic function, thereby reducing the pressure applied to the mounting site. The effect was obtained.
However, these elastic bodies increase in tension in accordance with the stroke of towing, and when worn around a person's waist, they can sit down or squat down during normal life and sports, after meals, , And when the abdominal and back muscles are stressed, the girth expands, and the tension of the telescopic belt expands according to the degree of the expansion, and the pressure that presses the girth increases unnecessarily, causing a feeling of pressure. The effect of softening was insufficient. As a result, the smoothness and rhythm of sports play may be impaired, the abdomen, spine and back muscles in contact with the belt may be prolonged and locally compressed, causing low back pain, and further exacerbating the symptoms of those who already have low back pain. Or was.

Further, in order to obtain the minimum tension necessary for fastening clothes in the initial state before the belt is stretched, these conventional telescopic belts require rubber, coil springs or leaf springs to reach a position where the tension is reached. Must be installed in a stretched state, and to obtain a long telescopic stroke,
As a result, the entire structure became longer, and the compactness, which is an important element of the buckle, was lost. Further, even when the belt was not worn, the elastic body was loaded so that the elastic body was quickly set and the life of the elastic function was short.

The buckle for a telescopic belt of the present invention has been made in response to such a problem of the prior art.
Achieving a long stretch stroke with a compact buckle without tightening the part to be worn more than the pressure required for tightening clothes, which is one of the original purposes of the belt, to the body to be mounted. It is an object of the present invention to provide a buckle for an elastic belt that can be extended and has a long life of an elastic function.

[0006]

Means for Solving the Problems In order to achieve the above object, a buckle for an elastic belt according to the present invention has a constant load spring attached to the buckle as means for providing an elastic function. In other words, one end of the band is fastened to the rear end of the buckle, the end of the constant load spring is connected to the slidably provided engaging body inside the buckle, and the other end of the constant load spring is inserted inside the spring case. The band is fixed, and the band is wrapped around the body, and the other end of the band is engaged with the engaging body and fastened to the body before the mounted portion of the body is enlarged. Things.

[0007] The above-mentioned constant load spring refers to a spring having a characteristic that its tension hardly changes even when the elongation of the spring increases.

The constant load spring is preferably wound around a reel and attached to a shaft provided in a buckle in order to keep the movement of the constant load spring stable.

Also, a rotating body is attached to the front end of the engaging body that comes into contact with the spring case to reduce the frictional resistance when the engaging body slides, so that the engaging body slides smoothly, and the present elastic belt Is effective in obtaining a constant tension from the constant load spring.

Further, providing a band cover on the engaging pin protruding from the upper lid prevents the wearer from touching the engaging pin to cause injury and the band from coming off the engaging pin. It is effective.

Further, two constant load springs having the same tension are juxtaposed, and both outer ends thereof are extended from the inside or the outside, and connected to the engaging body at the center thereof. The engaging body obtains an equal tension from the right and left constant load springs when sliding, and has an effect of sliding stably without rotating in the guide hole.

Further, when the outer end of the constant load spring is extended from the outside and coupled to the engaging member, an arc-shaped spring supporting plate is interposed to provide the spring when the constant load spring is extended. It has the effect of preventing deformation.

[0013] Further, it is effective to form a thin buckle by using a plurality of strip-shaped, narrow-width, low-tension constant-load springs to obtain the desired tension by overlapping the side surfaces of each other. It is.

Further, a pair of constant load springs having the same tension are arranged side by side, and a pair of slides provided in parallel with the outer ends extended from the outside of the pair of constant load springs by sliding inside the spring case. An annular band insertion part is formed by connecting the front ends of the pair of sliding bars to the rear ends of the moving bars, and connecting the front ends of the pair of sliding bars with connecting arms that project the engaging pins backward. The buckle is not formed.

In the buckle, a bridge is formed on the buckle so as to prevent the engagement pin protruding backward from contacting the object to be mounted at the time of sliding so as not to hinder the sliding. It is effective to lift the entire buckle.

When the elastic belt to which the present buckle for an elastic belt is attached is fastened to an object to be attached, the periphery of the attached portion expands and contracts at the same time.
It works so as to be always fastened to the object to be mounted with a constant tension within the range of the set expansion / contraction stroke.

Further, since the constant load spring can obtain a constant tension set from the beginning of the expansion / contraction stroke, it is not necessary to extend and mount the spring to obtain the necessary initial tension, and the constant load spring is long in a limited space. An expansion stroke can be obtained. Further, when the elastic belt is removed and stored, the spring is in a no-load state, so that the spring has little set-up and the life of the spring is kept long.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a buckle for an elastic belt according to the present invention will be described with reference to the drawings based on an example.

In FIGS. 1, 5, 6, 7, 8 and 9, the first
The following shows an example. A band cover 14 is formed above the upper lid 2a of the buckle A, an elongated guide hole 4a is formed in the center in the longitudinal direction, and the edge of the tip is bent and raised inward.
A fastening projection 16a is formed at the center thereof, and both side edges behind the upper lid 2a are bent inward to form a pair of opposed locking holes 25a.

On the spring case 3a, both side edges are bent inward, and a fastening recessed piece 17a projecting inward at the tip is formed to face the fastening projection 16a of the upper lid 2a. The rear end of the spring case 3a is provided with a wave-toothed edge formed by being bent and raised inward, and locking projections 21a are provided at both ends thereof to form a band stopper 23a. Further, a pair of shaft cores 18a and stoppers 15 are protruded on the rear portion of the inner surface of the spring case 3a.

Two pairs of fixing holes 7a opposed to each other are formed at the outer ends of a pair of constant load springs 5 wound around the reel 19 and having the same tension.
Is provided. The engaging body 8a is provided with a fixing hole 7b corresponding to the fixing hole 7a and penetrating therethrough, and an engaging pin 6a is provided on an upper portion thereof. Further, a rotating body mounting portion 9 having a shaft hole is provided at a front portion of the engaging body 8a.

A rotating body 10 having rotating shafts on both sides is rotatably mounted in a shaft hole of a rotating body mounting portion 9, and a pair of constant load springs 5 are provided.
The U-shaped fixing screw 11 having a single shaft threaded through the corresponding fixing holes 7a, 7b is communicated with the engaging body 8a by the outer surface thereof, and the outer end of the engaging portion 8a is interposed therebetween. The washer 12 is inserted into the portion, and the nut 13 is screwed on the screwed one shaft.

Further, a locking projection 21a of the spring case 3a is rotatably fitted in a locking hole 25a of the upper lid 2a, and
a, the constant load spring 5 wound around the reel 19
Is rotatably mounted on the shaft core 18a. At this time, the rear end of the engagement body 8a is fixed by the stopper 15. Further, one end of the band 1 is inserted into the band stopper 23a, and the upper cover 2a and the spring case 3a are fitted with the fastening projection 16a and the fastening recessed piece 17a, so that the engaging pin 6a is brought into the guide hole. The band 1 is slidably projected on the upper lid 2a through the upper cover 4a, and one end of the band 1 is fixed to the band stopper 23a.

In the thus constructed elastic belt, the other end of the band 1 provided with the engagement hole 33 is inserted from the band insertion hole 34, and the band before the band is enlarged. By engaging the engagement hole 33 with the engagement pin 6a in this state, the engagement hole 33 is fastened to the mounting portion with a constant tension.

FIGS. 7 and 9 show a state in which the telescopic belt is stretched to the maximum, and an engaging hole 33 at one end of the band 1 is
a, the telescopic belt is fastened to the object to be mounted, and the band 1
a, and the outer end of the constant load spring 5 is pulled out and pulled out through the engaging body 8a, during which the belt is fastened with a constant tension. At this time, while the rotating body 10 rotates, the engaging body 8a slides in the spring case 3a, and the engaging pin 6a receives an equal tension from the right and left constant load springs 5 and stably without rotating. It slides in the guide hole 4a.

In the first embodiment, since the engaging member 8a can be provided in parallel with the pair of constant load springs 5 in the initial state of the expansion / contraction stroke, the main expansion / contraction with the minimum length and the maximum expansion / contraction stroke is achieved. A buckle for a belt can be achieved, and there is no change in the length of the buckle A even when the present elastic belt is stretched, so that the buckle A can be formed most compactly in the longitudinal direction.

FIGS. 10, 11, 12 and 13 show a second embodiment. This shows a case where the pair of constant load springs 5 are used in a state where the outer ends thereof are extended from the outside and connected continuously. A fixed hole is provided in the center of the outside of the connected pair of constant load springs 5, a fixed screw hole is provided in the engagement body 8 b, and a fixed hole is provided in the center of the arc-shaped spring support plate 27. Fixing screw 3
2 is connected to the fixing hole of the constant load spring 5 from the fixing hole of the spring support plate 27 and screwed into the fixing screw hole of the engaging body 8b. Other structures are the same as in the first embodiment.

FIGS. 11 and 13 show a second embodiment.
This shows a state in which the telescopic belt is stretched to the maximum, and shows a state in which the band 1 pulls the engaging pin 6b and at the same time the outer end of the constant load spring 5 is extended from the outside. Further, the spring support plate 27 prevents the belt-shaped constant load spring 5 from being bent or bent when being extended.

FIG. 14 shows a third embodiment of the present invention, in which one constant load spring 5 is used. Engagement body 8c
On the upper surface of the guide hole 4a, a rectangular parallelepiped rotation preventing protrusion 2 whose two surfaces are parallel to the longitudinally opposed parallel surface of the guide hole 4a.
0 is provided. One shaft core 18a is projected at the center of the rear part of the spring case 3a, and a fixing hole is provided at the outer end of the constant load spring 5. Other structures are the same as in the second embodiment.

In the second and third embodiments, the engagement member 8
Since b and 8c are provided in front of the constant load spring 5, the length of the buckle A is longer than that of the first embodiment, but the number of parts is small and the price is advantageous.

FIGS. 15 and 16 show a fourth embodiment, in which a constant load spring 5 wound around a reel 19 is mounted on an engaging body 8d which slides in a spring case 3b.
Shaft core 1 protruding below engagement body 8d in spring case 3b
The constant load spring 5 wound around the reel 19 is rotatably mounted on 8b. The outer end of the constant load spring 5 is attached to the spring support plate 2 on the spring fixing portion 43 protruding from the rear center of the spring case 3b.
7 and fixed with a fixing screw 32. At the upper part of the engaging body 8d, there are provided an engaging pin 6c and a rectangular anti-rotation convex part 20 whose two surfaces are parallel to each other in the longitudinal direction of the guide hole 4a. Is equipped with a rotating body 10. A band stopper 23 provided by rotatably fitting a locking projection 21a of a spring case 3b to a locking hole 25a of the upper lid 2a.
a, the upper end 2a and the spring case 3b are fitted with the fastening projections 16a and the fastening recesses 17a, so that the engaging pin 6c and the rotation preventing projection 20a are fitted. Are slidably projected on the upper cover 2a through the elongated guide hole 4a of the upper cover 2a, and one end of the band 1 is fixed to the band stopper 23a.

In the buckle A of the fourth embodiment, the engaging body 8d can be provided at a position overlapping with the constant load spring 5, so that the length of the buckle A is made compact as in the first embodiment. It is a form that can be done.

FIGS. 2, 17 and 18 show a fifth embodiment. A pair of shaft cores 18c protrude on the inner surface of the upper lid 2b at the rear portion inside the spring case 3c of the buckle B. Engagement body 8e
The connecting column 42 is connected to the upper part of the, and the rotating body 10 is mounted on the front part thereof. A pair of constant load springs 5 wound around a reel 19 are rotatably mounted on a pair of shaft cores 18c, and the upper lid 2b
A connecting column 42 is slidably penetrated through the elongated guide hole 4b provided at the upper part of the upper cover 2b and protrudes above the upper lid 2b. At this time, the portion of the connecting post 42 that slides in the guide hole 4b is a rectangular body whose two surfaces are parallel to the longitudinally opposed parallel surface of the guide hole 4b so that the connecting post 42 does not rotate. Further, the engaging body 8e and the outer ends of the pair of constant load springs 5 are connected in the same manner as in the first embodiment.

Further, an annular buckle body 41 for detachably engaging the band 1 is rotatably connected to an upper portion of a connecting column 42 protruding above the upper lid 2b. An engagement pin 6d is rotatably connected above the buckle main body 41 to a rear end portion of the center of the buckle main body 41. The upper lid 2b and the spring case 3c are fitted in the same manner as in the first embodiment, and at this time, the band stopper 23a provided at the rear of the buckle B is
One end of the band 1 is fixed. In the thus constructed telescopic belt, the other end of the band 1 provided with the engaging hole 33 is inserted into the hollow portion of the annular buckle body 41 from the back to the front, and the belt is Before the mounting portion is enlarged, the engaging hole 33 is engaged with the engaging pin 6d and fastened to the body to be mounted.

It can be easily understood that the shape and number of the constant load springs 5 and the method of coupling with the engaging members according to the fifth embodiment also apply to the embodiments in the second and third embodiments. It is.

The fifth embodiment is similar to the first, second, third and fourth embodiments.
Since the band cover 14 that covers the upper part of the buckle A is not required as compared with the embodiment of the present invention, the structure is high in safety so that the wearer's body or clothes are not hurt by the band cover 14 and hurt.

FIGS. 3, 19, 20, 21, 22 and 23 show a sixth embodiment. Buckle C top lid 2c
At the rear end, form a wavy edge bent inward,
Locking projections 21b are provided at both ends thereof to form band stoppers 23b.
To form The front side edges of the upper lid 2c are bent inward to form a pair of opposed fastening projections 22.

At the center of the rear end of the sliding plate 28 of the engaging body 8f,
The edge provided with the fixing screw hole 7e is bent and raised inward to form a spring fixing portion 26, and a side edge portion having a projection is bent in front to form a toothed band fixing plate 29. The outer ends of the pair of constant load springs 5 around which the pair of reels 19 are wound are extended from the outside and connected at the center, and a fixing hole 7f is provided at the center. A fixing hole 7g is provided in the center of the arcuate spring support plate 27, and the fixing screw 32 is connected to the fixing holes 7g and 7f and is screwed into the fixing screw hole 7e, so that the sliding plate 28 and a pair of constant load springs are provided. And 5.

The rear side edges of the spring case 3d are bent and raised inward to provide a pair of opposed locking holes 25b.
A pair of shaft cores 18d protrude from the rear portion inside the spring case 3d.
Both side edges of the front part of the spring case 3d are bent inward to form a pair of fixing concave pieces 17c facing the pair of fixing convex pieces 22 of the upper lid 2c. Furthermore, a pair of fastening concave pieces 17c
The side plates 30 at the both side edges provided at the front of are bent inward.

At the same time, a pair of constant load springs 5 wound around a pair of reels 19 are rotatably mounted on the shaft core 18d, and at the same time, a sliding plate 28 is mounted in the spring case 3d.
The side plate 30 is bent inward so as to cover the slide plate 28 to form a pair of opposed side guide grooves 31, and the slide plate 28 is slidably provided in the side guide grooves 31.

Further, the locking projection 21b of the upper lid 2c is rotatably fitted in the locking hole 25b of the spring case 3d, and the band 1
Is inserted into the band stopper 23b, the fastening convex piece 22 and the fastening concave piece 17c are fitted to each other, so that the spring case 3d and the upper lid 2c are fitted, and at the same time, the band 1 is fastened to the buckle C. Be worn. Further, the other end of the band 1 is fastened by a front toothed band fixing plate 29.

FIG. 22 shows a state in which the present stretchable belt in the sixth embodiment is stretched to the maximum, and the band 1 is
At the same time, the constant load spring 5 is extended from the outside, and the engaging body 8f slides in the side guide groove 31 and jumps out from the tip of the spring case 3d.
6 abuts against the side plate 30, and the engaging body 8f
It is prevented from deviating from d. During this time, the band 1 is pulled by the constant load spring 5 with a constant tension.
Further, the band-shaped constant load spring 5 is prevented from being bent or bent by the spring support plate 27.

Further, the mounting method of the constant load spring 5 is similar to the first and third embodiments, and the outer ends of the pair of constant load springs 5 are extended from the inside, and one constant load spring 5 is used. (Example of FIG. 23) can also be easily understood.

The buckle C of the sixth embodiment is connected to another buckle that allows the band 1 to be easily attached and detached, and the buckle C is attached to another buckle in a state before the mounted portion of the mounted body is enlarged. The buckle and the band 1 are engaged to fasten the mounted body with a constant tension. For example, it is effective to use a suspender type belt.

FIGS. 4, 24, 25, 26, 27 and 28 show a seventh embodiment. A pair of constant load springs 5 wound around a pair of reels 19 are rotatably mounted on a pair of shaft cores 18e protruding from a rear portion inside the spring case 3e of the buckle D. The front ends of a pair of sliding bars 40 provided in parallel are bent in the front direction and connected by a connecting arm 37, and an engaging pin 6e is protruded in the center of the connecting arm in the rear direction. A locking pin 24 is projected outward from a rear portion of the sliding bar 40, and a stopper 3 is provided outwardly in front of the locking pin 24.
By protruding the 6a, an engaging body 8e is formed.

Further, projecting forward of the spring case 3e,
At the same time, a pair of sliding bars 40 are inserted into a pair of side guide grooves 35 having a space formed therebetween, and a pair of constant load springs 5 having locking holes 7h corresponding to the locking pins 24 at the outer ends.
Is engaged with the locking pin 24. A pair of side guide grooves 35
Is bent inward, and the slide bar 40 is slidably mounted in the side guide groove 35. Further, a stopper 36b facing the stopper 36a is formed inside the distal ends of the pair of side guide grooves 35. Further, a bridge 38 is provided that connects the outer side walls of the pair of side guide grooves 35 and protrudes rearward.

Further, the edge of the rear end of the lower lid 2d is formed in a wave-tooth shape, and locking projections 21c are provided on both edges to bend and raise inward to form a band stopper 23c. The locking projection 21c is rotatably fitted in the locking hole 25c. Further, a fastening recessed piece 17b is formed at the front end of the lower lid 2d, and a fastening projection 16b facing the fastening recessed piece 17b is provided on a side portion provided by bending the front end of the spring case 3e inward. Is provided. One end of the band 1 is inserted into the band stopper 23c, and the fastening recess 17b is fitted to the fastening protrusion 16b to fasten the band 1 to the buckle D. In the present elastic belt configured as described above, the other end of the band 1 provided with the engagement hole 33 is inserted into the space between the pair of side guide grooves 35 from the back to the front, and is covered. The engaging hole 33 is engaged with the engaging pin 6e in a state before the mounted portion of the mounted body is enlarged, and is fastened to the mounted body with a constant tension.

FIGS. 27 and 28 show a state in which the belt is stretched in the seventh embodiment. At the same time that the band 1 pulls the engaging body 8g, the outer end of the constant load spring 5 is extended,
The band 1 is pulled with a constant tension. At this time, the stoppers 36a and 36b prevent the slide bar 40 from coming off the spring case 3e. Further, the bridge 38 raises the entire buckle D from the mounting portion, thereby forming the engaging body 8.
g can smoothly slide without touching the mounted body. Further, since the constant load spring 5 is mounted on the inner side of the locking pin 24, the tension of the outer end portion of the constant load spring 5 acting on the inside of the constant load spring 5 causes the outward of the locking pin 2.
4 is stably engaged.

The seventh embodiment realizes the same form as a general annular buckle of the prior art and has a function of expanding and contracting at a constant tension.

Further, in all the embodiments described above, as shown in FIG. 29, the side surfaces of a plurality of constant load springs (5a, 5b) having a small tension and a small width are overlapped with each other to reduce the necessary tension. By using the obtained constant load spring 5, a buckle for the present elastic belt having a thin structure can be achieved.

In all of the above-described embodiments, in order to maintain the tension characteristics of the constant load spring, the portion where the constant load spring is extended in the spring case has its side surface contacting anywhere in the spring case. It is attached so that it does not.

[0052]

The buckle for a telescopic belt of the present invention has the following effects by being configured as described above.

When the above-described elastic belt with the elastic belt buckle attached to a band is worn to fasten clothing to a body to be attached, the minimum tension required for fastening the clothing is determined. By setting the tension of the load spring, the tightening force of this telescopic belt is always constant within the range of the set telescopic stroke regardless of the degree of expansion of the part to be mounted, and the function for tightening clothes is maintained. However, the pressure on the abdomen, spine and back muscles can always be kept at a minimum and constant.

According to the above-described operation, the telescopic belt equipped with the present telescopic belt buckle can be used when a person wears it around his or her waist, sitting down or squatting in normal life or sports, after eating, The abdomen, spine, and back muscles are tightened with a minimum and constant tension against waist expansion and contraction that occurs when force is applied to the abdominal muscles and back muscles. It can minimize long-term, instantaneous, and local pressure on the back and back muscles, maintain the smoothness and rhythm of sports play, and help prevent spinal and spinal back pain. It does not make the symptoms of back pain worse.

Further, the constant load spring and the engaging pin are provided in parallel, and the set constant tension is set from the initial stage in which the engaging pin is pulled and slid without pulling out the spring to set the initial tension. As a result, it is possible to achieve a long telescopic stroke within a limited length, and to achieve a smaller buckle.

Further, a constant-width spring having a small width and a small tension is used in a superposed manner to obtain a constant-force spring having a small width. It can be built.

Further, when the present elastic belt is removed from the object to be stored and stored, the constant load spring is in a no-load state, and the set of the spring occurs only during the wearing time. The life of the buckle for the telescopic belt is extended, and the buckle for the telescopic belt has a long life of the telescopic function.

As described above, the elastic belt in which the buckle for the present elastic belt is attached to the band is different from the conventional elastic belt using rubber, a coil spring or a leaf spring.
This has the effect of resolving the disadvantages significantly.

[Brief description of the drawings]

FIG. 1 is a perspective view of a buckle A.

FIG. 2 is a perspective view of a buckle B.

FIG. 3 is a perspective view of a buckle C.

FIG. 4 is a perspective view of a buckle D;

FIG. 5 is an exploded view of the buckle A.

FIG. 6 is a front view of the inside of the spring case of the buckle A (the pair of constant load springs and the positions of the engagement bodies are in an initial state).

FIG. 7 is a front view of the inside of the spring case of the buckle A (in a state where the pair of constant load springs and the engagement body have moved to the maximum).

FIG. 8 is a vertical cross-sectional view of the buckle A (the pair of constant load springs and the positions of the engagement bodies are in an initial state).

FIG. 9 is a vertical cross-sectional view of the buckle A (in a state where the pair of constant load springs and the engagement body have moved to the maximum).

FIG. 10 is a front view of the inside of the spring case of the buckle A (the connected constant load spring and the engagement body are in an initial state).

FIG. 11 is a front view of the inside of the spring case of the buckle A (in a state where the connected constant load spring and the engagement body have moved to the maximum).

FIG. 12 is a vertical cross-sectional view of the buckle A (the connected constant load spring and the position of the engagement body are in an initial state).

FIG. 13 is a vertical cross-sectional view of the buckle A (in a state where the connected constant load spring and the engaging body have moved to the maximum).

FIG. 14 is a front view of the inside of the spring case of the buckle A (one constant load spring).

FIG. 15 is a front view of the inside of the spring case of the buckle A (one constant load spring, and mounting of the constant load spring via the reel to the engaging body).

FIG. 16 is a longitudinal sectional view of the buckle A (one constant load spring,
And attachment of a constant load spring to the engaging body via a reel)

FIG. 17 is a front view of a buckle B;

FIG. 18 is a longitudinal sectional view of a buckle B (a pair of constant load springs,
And the position of the engagement body is in the initial state)

FIG. 19 is an exploded view of a buckle C.

FIG. 20 is a front view showing the inside of the spring case of the buckle C;

FIG. 21 is a longitudinal sectional view of the buckle C (the connected constant load spring and the position of the engagement body are in an initial state).

FIG. 22 is a vertical cross-sectional view of the buckle C (in a state where the connected constant load spring and the engagement body have moved to the maximum).

FIG. 23 is a front view of the inside of the spring case of the buckle C (one constant load spring and an engagement body are in an initial state).

FIG. 24 is an exploded view of the buckle D (as viewed from the back).

FIG. 25 is a perspective view of a buckle D (as viewed from the back).

FIG. 26 is a front view of the inside of a spring case of the buckle D (a pair of constant load springs and an engagement body are in an initial state).

FIG. 27 is a front view of the inside of the spring case of the buckle D (in a state where the pair of constant load springs and the engagement body have moved).

FIG. 28 is a longitudinal sectional view of a buckle D (a pair of constant load springs,
And the engaging body has moved)

FIG. 29 is a perspective view in which constant load springs are superimposed.

[Description of sign]

 A, B, C, D Buckle 1 Band 2a, 2b, 2c Upper lid 2d Lower lid 3a, 3b, 3c, 3d, 3e Spring case 4a, 4b Guide hole 5, 5a, 5b Constant load spring 6a, 6b, 6c, 6d 6e engaging pin 7a, 7b, 7f, 7g fixing hole 7e fixing screw hole 7h locking hole 8a, 8b, 8c, 8d, 8e, 8f, 8g engaging body 9 rotating body mounting part 10 rotating body 11 U-shaped fixing screw Reference Signs List 12 washer 13 nut 14 band cover 15, 36a, 36b stopper 16a, 16b fastening projection 17a, 17b, 17c fastening recess 18a, 18b, 18c, 18d, 18e shaft core 19 reel 20 rotation preventing projection 21a, 21b Locking protrusion 22 Locking projection 23a, 23b, 23c Band stopper 24 Locking pin 25a, 25b, 25c Locking hole 27 Spring support plate 28 Sliding Plate 29 Toothed band fixing plate 30 Side plate 31, 35 Side guide groove 32 Fixing screw 33 Engagement hole 34 Band insertion hole 37 Connection arm 38 Bridge 40 Sliding bar 41 Buckle body 42 Connection support 43 Spring fixing part

Claims (9)

[Claims] 1. A band (1) and a buckle (A, B, C, D) with one end of the band (1) fixed thereto, which is fastened around a body to be mounted, and A belt that expands and contracts at the same time when the periphery of the mounted portion of the body expands and contracts, wherein a fastening force applied to the mounted portion becomes constant when the periphery of the mounted portion expands and contracts. For buckle. 2. A shaft core (1) projecting into a spring case (3a, 3c, 3d, 3e) of the buckle (A, B, C, D).
8a, 18c, 18d, 18e), a constant load spring (5) wound around a reel (19) is rotatably mounted, and an engaging body that slides in the spring case (3a, 3c, 3d, 3e). (8a, 8b, 8c, 8e, 8f, 8g), the outer end of the constant load spring (5) is connected to the buckle (A, B,
C, D) Band stoppers (23a, 23b, 2)
The buckle for an elastic belt according to claim 1, wherein 3c) is provided. 3. A spring case (3b) for said buckle (A).
Shaft core (18b) provided on engagement body (8d) sliding inside
, A constant load spring (5) wound around a reel (19) is rotatably mounted, and an outer end of the constant load spring (5) is attached to a spring fixing portion (43) in the spring case (3b). The buckle for an elastic belt according to claim 1, characterized in that a band stopper (23a) is provided at a rear end of the buckle (A). 4. An engaging pin (6a, 6b, 6c) slidably provided through an elongated guide hole (4a) provided in an upper lid (2a) of the buckle (A). Merging (8a, 8
4. The buckle for an elastic belt according to claim 2, wherein the buckle is provided on top of b, 8c, 8d). 5. A connecting post (42) slidably provided through an elongated guide hole (4b) provided in an upper lid (2b) of the buckle (B), and is connected to the engaging body (8e). A buckle body (41) for removably connecting the band (1) is rotatably connected to an upper part of a connecting column (42) protruding from the upper lid (2b). The buckle for an elastic belt according to claim 2 or 3. 6. A front part of the engaging body (8a, 8b, 8c, 8d, 8e) in the spring case (3a, 3b, 3c).
The buckle for an elastic belt according to claim 4 or 5, wherein the rotator (10) is rotatably mounted. 7. The spring case (3) of the buckle (C).
d) into the side guide groove (31) provided therein.
4. The buckle for an elastic belt according to claim 2, wherein f) is slidably provided. 8. The spring case (3) of the buckle (D).
e), a pair of side guide grooves (35) are provided side by side with a space provided therebetween, and a pair of slides whose distal ends are connected by a connecting arm (37) provided with an engaging pin (6e). The buckle for an elastic belt according to claim 2, wherein the engaging body (8g) constituted by a moving bar (40) is slidably mounted in the side guide groove (35). 9. A plurality of belt-shaped constant load springs (5a, 5b).
The buckle for an elastic belt according to claim 4, 5, 6, 7, or 8, wherein the constant load spring (5) wound around the reel (19) with its side surfaces overlapped with each other is used. .