CN101361616B

CN101361616B - Backstrap

Info

Publication number: CN101361616B
Application number: CN2008101349758A
Authority: CN
Inventors: 柳泽正明
Original assignee: Nikon Corp
Current assignee: Nikon Corp
Priority date: 2007-08-10
Filing date: 2008-08-07
Publication date: 2012-08-29
Anticipated expiration: 2028-08-07
Also published as: US20090065537A1; JP2009039415A; US20120205407A1; CN101361616A

Abstract

The invention provides braces which can adjust length handily. The braces (20) is constructed to include; a body section (21) which is formed in a strip shape and which includes a first turning end section (21a) formed by turning back a middle portion in a long side direction; a locking mechanism (24) which includes a first support section (25) that glidingly supports a region at one side of the body section from the first turning end section, and which includes a section support section (25a) that supports the end section of a region on the other side of the body section, included by an opposite side of the first turning end section, the locking mechanism can be switched between a free state that allows for the gliding of the region on one side with the first support section and a locking state that restricts the gliding.

Description

Braces

Technical field

The present invention relates to a kind of braces.

Background technology

As being assemblied in camera or hoping the braces on the glasses etc., known in the past have a braces that can carry out length adjustment easily.

Patent documentation 1: TOHKEMY 2006-87470 communique

Above-mentioned braces in the past for example but is difficult under the state that is hung on neck etc., to carry out length adjustment.

Summary of the invention

Problem of the present invention is to provide a kind of braces that can carry out length adjustment easily.

The present invention solves above-mentioned problem through following solution.In addition, understand for ease, describe corresponding to embodiment label symbol of the present invention, but not limited thereto.

The invention of technical scheme 1 provides a kind of braces, possesses: main part (21) is formed band shape and possesses the mid portion of long side direction formed first end (21a) of turning back of turning back; Locking mechanism (24); It has from above-mentioned first end of turning back sees first support (25) that the zone of a side of aforementioned body portion is slidably supported; And with the zone of the opposite side of aforementioned body portion, above-mentioned first turn back the end second support (25a) that supports of the end that opposition side possessed, change between free state that this locking mechanism can slide with above-mentioned first support in the zone that allows an above-mentioned side mutually and the lock-out state that limits this slip.

The invention of technical scheme 2; On the basis of the braces that technical scheme 1 is put down in writing; A kind of braces (1) is provided, wherein, on the zone of above-mentioned opposite side, be arranged on above-mentioned first turn back end (21b) the above-mentioned end of opposition side; Under the state that relatively moving of long side direction is restricted, be supported in above-mentioned second support at above-mentioned relatively second support of aforementioned body portion (21) (25a).

The invention of technical scheme 3 on the basis of the braces that technical scheme 1 or 2 is put down in writing, provides a kind of braces (1), wherein, also possesses: be formed band shape, and around the health that is hung on the user use around extension portion (10); Above-mentioned first end (21) of turning back is supported slidably; And with above-mentioned the 3rd support (22) that is connected around the end of extension portion; In the aforementioned body portion (21); With on the zone of an above-mentioned side, above-mentioned first turn back the end the end that opposition side possessed be connected in assembling object (100), above-mentioned locking mechanism (24) is set as and can above-mentioned relatively the 3rd support relatively moves along the long side direction of aforementioned body portion.

The invention of technical scheme 4 on the basis of the braces that technical scheme 1 is put down in writing, provides a kind of braces (2), wherein, also possesses: be formed band shape, and around the health that is hung on the user use around extension portion (10); Above-mentioned first end (41b) of turning back is supported slidably; And with above-mentioned the 3rd support (42) that is connected around the end of extension portion; Above-mentioned second support (45a) supports second end (41c) of turning back slidably; This second end of turning back is to form through the mid portion of the long side direction in the zone of the above-mentioned opposite side of aforementioned body portion is turned back; In the aforementioned body portion (41); Will the zone of above-mentioned opposite side, from above-mentioned second turn back the end see above-mentioned first turn back the end the end that opposition side possessed, be supported in above-mentioned the 3rd support, and with the zone of an above-mentioned side, be arranged at above-mentioned first turn back the end the end of opposition side; Be connected in assembling object (100), above-mentioned locking mechanism (44) is set to and can above-mentioned relatively the 3rd support relatively moves along the long side direction of aforementioned body portion.

The invention of technical scheme 5; On the basis of the braces that technical scheme 4 is put down in writing; A kind of braces (4) is provided; Wherein, above-mentioned second support (65a) possesses can be around first roller (65a) of the axis parallel with the width of aforementioned body portion (61) rotation, and above-mentioned second of the aforementioned body portion end (61c) of turning back is wound in the outer peripheral face of above-mentioned first roller.

The invention of technical scheme 6; In technical scheme 3 to 5 on the basis of any braces of being put down in writing; A kind of braces (4) is provided; Wherein, above-mentioned the 3rd support (62) possesses can be around second roller (62d) of the axis parallel with the width of aforementioned body portion (61) rotation, and above-mentioned first of the aforementioned body portion end (61b) of turning back is wound in the outer peripheral face of above-mentioned second roller.

In addition, label symbol and the formation that describes also can suitably improve also can replace to other with at least a portion in addition and constitute thing.

According to the present invention, the braces that can carry out length adjustment easily can be provided.

Description of drawings

Fig. 1 is the figure that makes one of use-case of the braces of expression first embodiment, representes by braces the state of camera around the neck that is hung on the user.

Fig. 2 is the figure of expression first pars contractilis that braces possessed shown in Figure 1.

Fig. 3 is the figure of the braces of expression second embodiment.

Fig. 4 is the figure of the braces of expression the 3rd embodiment.

Fig. 5 is the figure of the braces of expression the 4th embodiment.

Symbol description: 1-braces; 10-is around extension portion; 20-first pars contractilis; The 21-main part; The 21a-end of turning back; The 22-connecting portion; 24-second adjuster.

The specific embodiment

First embodiment:

Below, will describe the embodiment that is suitable for braces of the present invention with reference to accompanying drawing.And, in following embodiment, be to describe as example with the braces that camera uses as braces.

Fig. 1 is the figure that makes one of use-case of braces of expression first embodiment, expression be to use braces with camera around the state that is hung on user's neck.Among above-mentioned Fig. 1, (a) expression is the state that the total length of braces has been extended with respect to (b).

The whole shape of braces 1 is made into band shape, and an end of long side direction is connected in the side of a side of camera 100, the other end of long side direction is connected in the side of the opposite side of camera 100.Among Fig. 1, the mid portion of the long side direction of braces 1 branch uses around the neck that is hung on the user, but also can for example use around other parts of the healths such as shoulder that are hung on user 200.

Braces 1 possesses: around extension portion 10, will be somebody's turn to do first pars contractilis 20 that is connected with camera 100 around an end of extension portion 10 and second pars contractilis 30 that will be connected with camera 100 around the other end of extension portion 10.

For example be parts around extension portion 10 by formed band shapes such as chemical fibre materials, as shown in Figure 1, the summary central portion of long side direction waited around the neck that is hung on user 200 use.

On an end of extension portion 10, the end 11 of turning back of turning back and forming that is provided with as shown in Figure 2 with the mode facial respect to one another of one of which side.For the end 11 of turning back, its relative face for example fixes through stitching, thereby will form ring-type around the end of extension portion 10.Though omitted diagram, also possessed the end of turning back of the ring-type of being formed around extension portion 10 in its other end.

Then, the structure to first pars contractilis 20 describes.

Fig. 2 (a)～(d) is vertical view and the cutaway view that first pars contractilis that braces possessed shown in Fig. 1 is amplified expression.Among this Fig. 2, (a) and (b) expression is the state of with (c) and (d) comparing the total length of the pars contractilis that extended.In addition, among Fig. 2, (a) reaching (c) is vertical view, and (b) reaching (d) is the cutaway view of width middle body.

First pars contractilis 20 is like Fig. 1 and shown in Figure 2, and the one of which end connects to camera 100, and the other end is connected in the end (end 11 of turning back) around extension portion 10.

First pars contractilis 20 possesses main part 21, connecting portion 22, first adjuster 23 and second adjuster 24.

Main part 21 for example is the parts by formed band shapes such as chemical fibre materials.

On one end of main part 21 (camera 100 sides), be provided with the end 21a that turns back that face with a side of main part 21 (below, be called back side portion) mode respect to one another is turned back and formed.Thus, the end with main part 21 forms ring-type.

The side of camera 100 is provided with the endless member that is called as suspension ring 101, and this suspension ring 101 are inserted leads in the end 21b that turns back of the above-mentioned main part 21 that is formed ring-type.

In addition, on the other end of main part 21 (around extension portion 10 sides), also be provided with the end 21b that turns back that turns back and form respect to one another of back side portion of main part 21.Thus, the other end with main part 21 also forms ring-type.

Connecting portion 22 is with main part 21 and the parts that are connected around extension portion 10, is for example formed the ring-type of rectangle by the synthetic resin material.This connecting portion 22 is inserted the end 21b that turns back that leads in being formed ring-type respectively around the turn back end 11 and the main part 21 of extension portion 10.Connecting portion 22 props up the end 21b that turns back of the turn back end 11 and the main part 21 of winding extension portion 10 slidably.

First adjuster 23 is the parts of size that are used for regulating the long side direction of (adjust) first pars contractilis 20, is set at zones first pars contractilis 20, camera 100 sides.

First adjuster 23 possesses: be formed rectangle ring-type the main frame 23a of portion and cross over relative limit portion among the main frame 23a of portion and the bar-like portion that is the support 23b that are provided with.Support 23b is configured to the approximate width that is parallel to braces 1.

First adjuster 23 for example is by the formed moulding article of synthetic resin material, forms main frame 23a of portion and support 23b.

Here, in the zone of camera 100 sides of main part 21, form folding zone (label symbol A1 among Fig. 2) through the formation end 21a that turns back.The regional A1 that should fold is wrapped in the support 23b of first adjuster 23.First pars contractilis 20 can change its total length through the length that changes this folding regional A1.

If to the tension force on the long side direction of first adjuster, 23 effect main parts 21, main frame 23a of portion and support 23b can push above-mentioned folding regional A1 towards mutually different direction.First pars contractilis 20 utilizes the frictional force that between the one of the back side of main part 21, produces this moment, can prevent that main part 21 from detaching from first adjuster 23.

Second adjuster 24 and first adjuster 23 are the parts of size that are used to regulate the long side direction of main part 21 equally, be set at main part 21, around the zone of extension portion 10 sides.

Second adjuster 24 possesses base portion 25 and lever portion 26.

Base portion 25 is relative rectangular plate shape parts that dispose with the back side portion of main part 21.Base portion 25 possesses slotted hole portion, and main part 21 can pass through this slotted hole portion and arrive near the end of extension portion 10 sides, and is provided with in the end around extension portion 10 sides and forms bar-shaped support 25a.

Lever portion 26 forms rectangular plate shape, and the distolateral two sides of one of which are supported on the base portion 25 via axial region 26a axle.Lever portion 26 can and base portion 25 relative to latched position and move between the free position that axial region 26a has rotated from this latched position.Be represent the lever portion 26 of free position with solid line among Fig. 2, and be represented by dotted lines the lever portion 26 of latched position.

Aforementioned body portion 21 is through between base portion 25 and the lever portion 26, and base portion 25 is brought into play the effect of first support.

Lever portion 26 possesses claw 26b, its be arranged on axial region 26a neighbouring, relative with base portion 25 facial and side-prominent towards base portion 25.Claw 26b is under free state, and from coming out through the path yielding of main part 21, the main part 21 and second adjuster 24 can relatively move along the long side direction of main part 21.Relative with it, claw 26b under lock-out state, be projected into main part 21 through the path, towards base portion 25 pushing main parts 21.Under this lock-out state, claw 26b snaps onto in the main part 21, and by feat of the frictional force between main part 21 and the claw 26b, makes main part 21 relative base portion 25 be in the lock-out state of locking (fastening).

Here, as stated, the end around extension portion 10 sides of main part 21 is provided with the end 21b that turns back, and it forms turns back the long side direction mid portion of main part 21.

In the main part 21, the zone (Fig. 2, being labeled as symbol B1) of a side of seeing from the end 21b that turns back; Pass through as stated between base portion 25 and the lever portion 26; The zone of opposite side (among Fig. 2, being labeled as symbol B2) is with the area B 1 of this side camera 100 sides of turning back abreast.

The area B 2 of this opposite side, the mid portion of long side direction twined the support 25a of base portion 25 again, connecting portion 22 sides of turning back back (the end 21b side of turning back), and support 25a plays the effect of second support.Below; In the area B 2 of opposite side; To be called zone C 1 from the zone that the end 21b that turns back plays the part that the portion 25a of being supported turns back; And will be called zone C 2 from the zone that is supported till the cephalic par of main part 21 that part that the 25a of portion turns back plays the area B 2 that is present in opposite side, describe (referring to Fig. 2 (b)).

Zone C 2 is configured between the area B 1 of a zone C 1 and a side, for example can fix through sewing up with respect to zone C 1.Thus, the area B 2 of the opposite side of main part 21 under the limited state that relatively moves of the long side direction of the braces 1 of relative second adjuster 24, is supported in the base portion 25 of second adjuster 24.

Second pars contractilis 30 is as shown in Figure 1, possesses the formation same with first pars contractilis 20 (main part 31, connecting portion 32, first adjuster 33 (omitting diagram), second adjuster 34), omits the explanation to it here.

Next, will the method for using of the braces 1 of first embodiment be described.

The braces 1 of this embodiment is that the total length that can set braces 1 is that length is used arbitrarily at the state shown in Fig. 1 (a) (state of lengthening braces total length) with between the state (shortening the state of the total length of braces) (b).

Below, will the operation of first pars contractilis 20 be described, also can carry out the operation same to second pars contractilis 30 with the operation of first pars contractilis 20.

From the long state of the total length of the braces shown in Fig. 1 (a), when shifting the state to the total length of the shortening braces shown in Fig. 1 (b), remove the lock-out state of second adjuster 24, second adjuster 24 that makes this disarm state (photograph pusher side) downwards moves.This operation only pinches second adjuster 24 and moves downwards, and do not touch camera 100 or braces 1 around extension portion 10.

Main part 21 at second adjuster 24 under connecting portion 22 situation that (camera 100 sides) move downwards; Its end 21b that turns back slides into connecting portion 22; The total length of the area B 2 of the opposite side of seeing from the end 21b that turns back is elongated; Relative with it, the total length of the area B 1 of the opposite side of seeing from the end 21b that turns back shortens.Thus, the area B 1 of a side is extracted to area B 2 sides of opposite side, the area B 2 of area B of a side 1 and opposite side overlapping length lengthening, the total length of first pars contractilis 20 shortens (referring to Fig. 2 (c), (d)).

The total length of first pars contractilis 20 shortens, and makes the total length of braces 1 reach under the situation of required length, and the user operates the lever portion 26 of second adjuster 24, makes second adjuster 24 be in blocked state.Under the lock-out state of second adjuster 24, because the slip of 24 in main part 21 and second adjuster is limited, so the total length of braces 1 maintains above-mentioned required length.

In addition; At the state of lacking from the total length of the braces shown in Fig. 1 (b); Transfer is removed the lock-out state of second adjuster 24 when the state of the total length of the lengthening braces shown in Fig. 1 (a), second adjuster 24 of this disarm state is moved to top (around extension portion 10 sides).Afterwards, after the total length of braces 1 reached required length, operating lever portion 26 was in the lock state second adjuster 24.

Braces 1 according to this embodiment of above explanation can obtain following effect.

(1), can switch free state and lock-out state in position (position arbitrarily of the long side direction of main part 21) arbitrarily, so user 200 can be for example wait arbitrarily the length of adjustment braces 1 to go forward side by side to exercise according to physique to use because second adjuster 24.

(2) operation of length of adjustment braces 1, the operation of second adjuster 24 carries out owing to only pinch, and do not make hand touch main part 21, camera 100 around extension portion 10 or pars contractilis (first pars contractilis 20 and second pars contractilis 30), so operation is easy.

(3) first pars contractilis 20 (second pars contractilis 30) around the end of extension portion 10 sides, owing to there is not free end, even if therefore shorten the length of braces 1, do not produce yet and contain free-ended remainder, regain braces 1 well.

Second embodiment:

Then, describe for second embodiment that is suitable for braces of the present invention.This second embodiment and after in other embodiment of stating, for the part that plays with the first above-mentioned embodiment same function, the mark prosign or at the end the unified symbol of mark, suitably omit the explanation or the accompanying drawing of repetition.

Fig. 3 (a)～(d) is the figure of the pars contractilis that possessed in the braces of expression second embodiment.

The braces 2 of second embodiment, connecting, different with the braces 1 of first embodiment around aspect the structure of the structure of the connecting portion 42 of the extension portion 10 and first pars contractilis 40 and the locking mechanism that is second adjuster 44.To describe its difference below.

The connecting portion 22 of first embodiment is the ring-type of rectangle; The i.e. ring in a hole; Relative therewith, the connecting portion 42 of second embodiment possesses two hole portions of arranging along the long side direction of braces 2, and bar-shaped part is set to three on the long side direction of braces 1.Below, will be to these bar-shaped parts, from being called the first support 42a, the second support 42b, the 3rd support 43c around extension portion 10 sides and describing.

Be arranged at the end 11 of turning back, twine the first support 42a in connecting portion 42 around extension portion 10.

The set end 41b that turns back between the area B 1 of the side on the main part 41 and the area B 2 of opposite side twines in the second support 42b.

Here; In the first embodiment, be included in the zone C 2 of another area B 2, fixed with respect to the first area C1 of relative configuration; But in this second embodiment; Another area B 2 after the support 45a of second adjuster 44 turns back connecting portion 42 sides, twines in the 3rd support 42c of connecting portion 42 and second adjuster 44 of turning back back (camera 100 sides) once more.

Below; Among the area B 2 of the opposite side of main part 41; The zone that the end 41b that will turn back certainly plays till the part that the portion 45a of being supported turns back is called first area C1; To be supported the zone that part that the 45a of portion turns back plays till the part of being turned back by the 3rd support 42c certainly and be called zone C 2, will be called zone C 3 from the zone till the part of being turned back by the 3rd support 42c plays the cephalic par of main part 41 and describe.Zone C 3 is configured between zone C 1 and the zone C 2, and opposed area C2 for example can fix through sewing up.

The braces of the second embodiment also braces 1 with first embodiment is identical, through with second adjuster 44 downwards (camera 100 sides) move, thus from the state transitions shown in Fig. 3 (a) and (b) to the state shown in Fig. 3 (c), (d) (referring to Fig. 1 (b)).

Here, during to camera 100 side shiftings, connecting portion 42 self is not moved at second adjuster 44, and second adjuster 44 moves relative to connecting portion 42.If the distance that the connecting portion 42 and second adjuster are 44 increases; Then the end 41b that turns back of main part 41 correspondingly slides into the second support 42b of connecting portion 42, is formed on the support 45a that the end 41c that turns back between zone C 2 and the zone C 3 slides into base portion 45 in addition.Thus, the area B 1 of a side is extracted to area B 2 sides of opposite side, the distance lengthening of zone C 1 and zone C 2, and the reduced distances of area B 1, and the total length of first pars contractilis 40 shortens.

In the braces 1 of first embodiment shown in Figure 2; Second adjuster 24 to the variable quantity of the length of the amount of movement of connecting portion 22 and first pars contractilis 20 much at one; But in the braces 2 of this second embodiment; With respect to the amount of movement of second adjuster 44, first pars contractilis 40 has elongated or shortened length with the variable quantity of twice approximately.

Therefore, can change the total length of braces 2, so can earlier change the operation of the length of braces 2 through operational ton seldom.

The 3rd embodiment:

Below, will the 3rd embodiment that be suitable for braces of the present invention be described.

Fig. 4 is the figure of the braces of expression the 3rd embodiment.

The braces 3 of the 3rd embodiment is the mode of texturing of the braces of first embodiment, wherein, with first pars contractilis 50 and the connecting portion that is connected around extension portion 10 52, possesses roller 52a in the part of the end 51b that turns back of support body portion 51 slidably.The rotation of this roller 52a is parallel with the width of braces 3, and the end 51b that turns back of main part 51 is wrapped in the outer peripheral face of roller 52a.

The braces 3 of the 3rd embodiment, main part 51 can reduce the frictional force that results from therebetween with connecting portion 52 when sliding, can more easily carry out the length adjustment of braces 3, has improved ease of use.

The 4th embodiment:

Then, will the 4th embodiment that be suitable for braces of the present invention be described.

Fig. 5 is the figure of the braces of expression the 4th embodiment.

The braces 4 of the 4th embodiment is the mode of texturing of the braces 2 of second embodiment, and is identical with above-mentioned the 3rd embodiment, and connecting portion 62 possesses the slidably roller 62d of the end 61b that turns back of support body portion 61.In addition, braces 4 is in the base portion 65 of second adjuster 64, and is provided with roller 65a in the part of the end 61c that turns back of support body portion 61.

The braces 4 of the 4th embodiment is also identical with the 3rd embodiment, can change the length of braces 4 through littler power.

Mode of texturing:

The present invention is not limited to embodiment discussed above, can carry out various distortion or change, and they are all within technical scope of the present invention.

(1) formation of braces of the present invention, the situation that is not limited in the embodiment to be put down in writing can be carried out suitable distortion.For example, the braces of embodiment is provided with pars contractilis at the both ends around extension portion, but not limited thereto, also can only possess pars contractilis in the end around extension portion.

In addition, also can braces self be made as the formation of pars contractilis with embodiment.For example, in the braces of first embodiment, be connected with the suspension ring of a side of camera, be connected with around extension portion, but also can connect the suspension ring of opposite side at its other end at the other end at an end of main part.In addition, can also an end of main part be connected in suspension ring, and not carry out any connection at the other end.

(2) though the braces of embodiment is assembled on the camera, conduct is equipped with the assembling object of braces of the present invention, and is not limited thereto.For example, both can be the optical device of hoping glasses etc., also can be the mobile electronic device of portable phone etc.In addition, the assembling object also can be the article of suitcase etc., can also use on the shoulder belt of the suspender belt of back porch etc. or knapsack etc. etc. being suitable for braces of the present invention.

(3) locking mechanism of embodiment is to form lock-out state in the braces through claw is snapped onto, but the structure of locking mechanism is not limited thereto.

Claims

1. braces is characterized in that possessing:

Main part is formed band shape and possesses the mid portion of long side direction formed first end of turning back of turning back;

Locking mechanism; Have from above-mentioned first end of turning back and see first support that the zone of a side of aforementioned body portion is supported slidably; With above-mentioned first of aforementioned body portion second support that the end in zone that opposition side possessed, opposite side of end supports of turning back; And lever portion; This lever portion is arranged on the opposition side of above-mentioned first support across aforementioned body portion, and can and limit between the lock-out state of this slip and change in the free state of the slip between zone of allowing an above-mentioned side and above-mentioned first support

Above-mentioned locking mechanism forms above-mentioned lock-out state through the zone that utilizes above-mentioned first support and the above-mentioned side of above-mentioned lever portion clamping.

2. braces according to claim 1; It is characterized in that; Be arranged at above-mentioned first turn back the end the above-mentioned end in zone opposition side, above-mentioned opposite side, above-mentioned relatively second support is supported in above-mentioned second support under the state that relatively moving of long side direction is restricted in aforementioned body portion.

3. braces according to claim 1 is characterized in that,

Above-mentioned lever portion forms: under above-mentioned free state, can regulate the length of the long side direction of the main part in the zone of an above-mentioned side.

4. according to each described braces in the claim 1 to 3, it is characterized in that also possessing:

Be formed band shape, and around the health that is hung on the user use around extension portion; And

Above-mentioned first end of turning back is supported slidably, and with above-mentioned the 3rd support that is connected around the end of extension portion,

In the aforementioned body portion, with above-mentioned first turn back the end the end in zone that opposition side possessed, an above-mentioned side be connected in the assembling object,

Above-mentioned locking mechanism is set as and can above-mentioned relatively the 3rd support relatively moves along the long side direction of aforementioned body portion.

5. braces according to claim 1 is characterized in that also possessing:

Above-mentioned second support supports second end of turning back slidably, and this second end of turning back is formed through the mid portion of the long side direction in the zone of the above-mentioned opposite side of aforementioned body portion is turned back,

In the aforementioned body portion; To see that above-mentioned first turns back the overhang bracket in zone that opposition side possessed, above-mentioned opposite side of end in above-mentioned the 3rd support from above-mentioned second end of turning back; And with the zone of an above-mentioned side, be arranged at above-mentioned first turn back the end the end of opposition side be connected in the assembling object

Above-mentioned locking mechanism is set to and can above-mentioned relatively the 3rd support relatively moves along the long side direction of aforementioned body portion.

6. braces according to claim 5 is characterized in that,

Above-mentioned second support possesses can be around first roller of the axis parallel with the width of aforementioned body portion rotation,

Above-mentioned second of the aforementioned body portion end of turning back is wound in the outer peripheral face of above-mentioned first roller.

7. braces according to claim 4 is characterized in that,

Above-mentioned the 3rd support possesses can be around second roller of the axis parallel with the width of aforementioned body portion rotation,

Above-mentioned first of the aforementioned body portion end of turning back is wound in the outer peripheral face of above-mentioned second roller.

8. according to claim 5 or 6 described braces, it is characterized in that,