CN103167816A

CN103167816A - Chair with armrest

Info

Publication number: CN103167816A
Application number: CN2011800502869A
Authority: CN
Inventors: 益永浩; 小田洋一郎; 五十岚僚
Original assignee: Okamura Manufacturing Co Ltd
Current assignee: Okamura Corp; Okamura Manufacturing Co Ltd
Priority date: 2010-10-19
Filing date: 2011-10-07
Publication date: 2013-06-19
Also published as: WO2012053381A1; EP2630894A4; EP2630894A1; US20130207427A1; KR20130133763A

Abstract

The present invention relates to a chair with an armrest. In one embodiment, the chair with an armrest comprises a support base (5) supported by a leg, a seat (6) that is pivotally mounted to the support base (5) using an axle (9) extending in the lateral direction, the rear part of the seat being able to rotate in the vertical direction, an impelling means (10) that is provided at the support base (5) and upwardly impels the seat (6) at the rear of the axle (9), and an armrest (14) provided to the support base (5). When the rear part of the seat (6) rotates in the vertical direction the height of the armrest (14) does not change and therefore arms or other body parts are not squeezed between the top board of a desk and the armrest (14).

Description

The chair of Armrest

Technical field

The present invention relates to a kind of chair of Armrest, relate in particular to a kind of chair of following Armrest, it is under not use state, lift at the rear portion of seat support, when the person of taking a seat took a seat, seat support turned to the approximate horizontal position together with buttocks with the person's of taking a seat buttocks butt, guide thus to take a seat, when the person of taking a seat stood, the rear portion of seat support was lifted with auxiliary and is stood up.

Background technology

As this chair, known have a following type, be about to chair base supporting for the not use location that can tilt towards the back upper place at the substructure body with respect to chair with respect to rotating between the substructure body level of chair or the use location that tilts towards the back lower place, and be provided with seat support to the force application mechanism of the use location application of force not, be provided with the chair back (for example with reference to patent documentation 1) at the rear portion of seat support.

On the other hand, also known have a chair (for example with reference to patent documentation 2) that handrail is linked to seat support.

[formerly technical literature]

[patent documentation]

[patent documentation 1] TOHKEMY 2010-104463 communique

No. 3156115 communique of [patent documentation 2] Japan Patent

Summary of the invention

The summary of invention

The problem that invention will solve

Handrail is wished to arrange not using for the chair that rotates between state and use state in the rear portion of this seat support of putting down in writing for patent documentation 1.But, the such chair of patent documentation 1 is being installed handrail as patent documentation 2 in the situation that on seat support, as the person of taking a seat when taking a seat at seat support and handrail is put into state under desk and stood, along with rotate upward at the rear portion of seat support, handrail also is moved upward, and handrail might be connected to the panel of desk.

The present invention puts in view of the above problems and makes, and its purpose is to provide a kind of chair that can use safely the Armrest of handrail when the posterior rotation of seat support.

Be used for solving the means of problem

According to the present invention, above-mentioned problem is following to be solved.

(1) a kind of chair of Armrest, it possesses: supporting base, it is supported by the chair leg; Seat support, it is pivotally connected to described supporting base by the pivot towards left and right directions, and rotate at the rear portion of this seat support direction up and down; Force application mechanism, it is located at described supporting base, and to the described pivot of ratio in seat support by the rear portion at the rear application of force that makes progress; Handrail, its underpart and described supporting base link, and top erects from the outer side of described seat support.

According to this structure, though the rear portion of seat support up and down direction rotate, the height of the handrail that links with supporting base can not change yet.Therefore, when the person of taking a seat stood from seat support, handrail can not connect with the panel of desk etc., therefore can use safely chair.

(2) on the basis of above-mentioned (1), described supporting base forms the shape that expands towards the place ahead under observation overlooking, and tilts towards the front upper place under side-looking is observed, and the side of the front portion of described handrail and described supporting base links.

According to this structure, seat person in handrail is shorter by the distance with respect to the horizontal direction between the linking part of supporting base of the part of elbow and handrail owing to making, therefore, when effect on handrail when the load of being brought by the person of taking a seat is arranged, the bending moment on the linking part that links with supporting base that can reduce to act on handrail.Thereby handrail is come off from supporting base.In addition, because the top front portion, ratio rear portion of handrail and supporting base links, therefore, compare with the situation that rear portion with handrail and supporting base links, can shorten the length of the above-below direction of handrail.

(3) on the basis of above-mentioned (2), the ratio top side's in rear portion of described seat support and described supporting base is anterior pivotally connected, and the described pivot of ratio in described handrail and described supporting base links by the position at rear.

According to this structure, due to the position of leaving pivot that handrail can be linked to supporting base, therefore the large parts of the enough heavy walls of energy consist of linking part and improve intensity.Can avoid thus handrail to come off from supporting base.

(4) in above-mentioned (1)～(3) on the basis of any one, described handrail possesses at the main handrail post of the L font that is inside under observation and the elbow pad member that arranges in the upper surface of handrail post looked, and described handrail post erects by the below of described seat support and above the lateral direction of described seat support from described supporting base.

According to this structure, due to the handrail that links with supporting base is left from lower surface and the side of seat support, therefore, handrail can not hinder the rotation of seat support.

(5) either party at the installation portion of installing to the described section of being mounted of the section that is mounted of the chair that the handrail of the side that is arranged in described seat support is installed and handrail establishes forked fitting projection, establish forked chimeric recess described the opposing party in being mounted section and described installation portion, width between the lateral surface of described fitting projection is along with towards the front end of fitting projection and narrow down gradually, and the width between the medial surface of described chimeric recess is along with towards the inboard of chimeric recess and narrow down gradually, described a pair of fitting projection and at the recess between a pair of fitting projection and described a pair of chimeric recess and the teat tabling between a pair of chimeric recess, by retention mechanism with described installation portion with described to be mounted section fastening from the chimeric direction of described fitting projection and described chimeric recess.

According to this structure, the medial surface of the lateral surface of a pair of fitting projection of the bifurcated in one side of the section that is mounted of chair or the installation portion of handrail and a pair of chimeric recess of the bifurcated in the opposing party forms to the taper of same direction inclination, therefore, fitting projection and chimeric recess are with the large tracts of land butt.Thereby, being mounted can not produce between section and rocking of the installation portion of handrail and chair, when effect has the load of being brought by the person of taking a seat on handrail, can reduce the shear stress that the installation portion at handrail produces.

(6) on the basis of above-mentioned (5), the section of being mounted of described chair is located in the part of overlooking under observation towards the place ahead or the width of the structure member that the rear width broadens broadens.

According to this structure, can shorten the distance of the horizontal direction of the part of the load effect that is brought by the person of taking a seat of the handrail that is arranged in the seat support side and installation portion, therefore when acting on when the load of being brought by the person of taking a seat is arranged, can reduce to act on the bending moment on the installation portion of handrail on handrail.

(7) on the basis of above-mentioned (5) or (6), be provided with screwed hole from the front end face of the teat between described a pair of chimeric recess towards the base portion of teat, bottom surface in the female section is provided with screw insertion hole, is screwed together in described screwed hole and the installation portion of described handrail is anchored on the section that is mounted of described chair by the screw that will pass screw insertion hole.

According to this structure, can increase the installation portion of handrail and the section of being mounted of chair are carried out the length that is screwed into of fastening screw, thereby can strengthen the fastening force of screw.

(8) on the basis of above-mentioned (5), be provided with around the installation portion in described handrail with described chair in the section that is mounted around the flange part that connects of part.

According to this structure, can prevent the excessive situation of inlay resultant force of the section that is mounted of the installation portion of handrail and chair.

The invention effect

According to the present invention, when direction was rotated up and down the rear portion of seat support, the height of the handrail that links with supporting base did not change, and therefore can use safely handrail.

Description of drawings

Fig. 1 is the front view that does not use state of an embodiment of the chair of Armrest of the present invention.

Fig. 2 is the side view of the chair of Armrest shown in Figure 1.

Fig. 3 is the side view of use state of the chair of Armrest shown in Figure 1.

Fig. 4 is the side view when making chair back hypsokinesis under the use state of the chair of Armrest shown in Figure 1.

Fig. 5 is the amplification plan view that the link structure of the supporting base observed from the V-V line of Fig. 2 and handrail is shown.

Fig. 6 is the VI-VI line amplification view of Fig. 2.

Fig. 7 is the amplification stereogram from the section that is mounted of the installation portion of the handrail of oblique rear observation Fig. 2 and supporting base.

Fig. 8 is from the elbow pad installation portion of oblique forward observation handrail and the amplification exploded perspective view of elbow pad.

Fig. 9 is the amplification stereogram from the installation portion of the oblique beneath elbow pad at rear.

Figure 10 decomposes the amplification vertical profile side view that handrail and elbow pad are shown.

Figure 11 illustrates the elbow pad is loaded in the amplification vertical profile side view of the state in slightly the place ahead of elbow pad installation portion.

Figure 12 illustrates the amplification vertical profile side view that the elbow pad is installed on the state of elbow pad installation portion.

Figure 13 is the XIII-XIII line amplification view of Figure 12.

Figure 14 is the XIV-XIV line amplification view of Figure 12.

The specific embodiment

Below, one embodiment of the present invention is described with reference to the accompanying drawings.

As Fig. 1 and shown in Figure 2, the chair of this Armrest possesses chair leg body 3, and this chair leg body 3 has at leading section and possesses castor 1 and radial five chair leg bars 2.At vertical the possess air spring telescopic chair leg post 4 of (omitting diagram) of being provided with of the central authorities of chair leg body 3, be fixed in the upper end of chair leg post 4 towards the rear portion of the supporting base 5 in the place ahead.

Supporting base 5 forms towards overlooking of the place ahead expansion and is leg-of-mutton pateriform (with reference to Fig. 5), and as shown in Figure 2, tilts towards the front upper place under side-looking.In addition, as shown in Figure 1, supporting base 5 forms up from forward observation " コ " shape and opening forwards, therefore, when carrying out the installation exercise that parts are installed to supporting base 5, not only easily from the side or rear insertion parts or instrument etc., also easily from the place ahead insertion parts or instrument etc.

As shown in Figure 2, seat support 6 comprises plastic chair seat board 7 and is arranged on the bolster 8 of the upper surface of chair seat board 7, utilization is pivotally connected to the front end both sides of chair seat board 7 respectively the front end both sides of supporting base 5 towards the pivot 9 of left and right directions, can make thus seat support 6 centered by pivot 9 to the not use location that tilts towards the back upper place and level shown in Figure 3 or the use location that tilts towards the back lower place rotate.This slewing area is preferably roughly about 15 degree.

Seat support 6 is biased mechanism 10 application of force that makes progress towards use location not when flat.

As shown in Figure 2, the front portion of the part that the forwards bending of both sides, bottom of the chair back 11 is formed is by being pivotally connected to respectively the both sides, rear portion of chair seat board 7 towards the bolster 12 of left and right directions, the chair back 11 can be to Fig. 2 and shown in Figure 3 roughly rotating towards the set-up positions of top and reclined position shown in Figure 4 centered by bolster 12.Need to prove, therefore the concrete structure of this chair back 11 and pivotally connected part thereof omits its diagram and explanation in detail owing to there is no direct relation with the present invention.

As shown in Figure 2, link by the pressure rod that can carry out elastic telescopic 13 towards fore-and-aft direction than above-mentioned bolster 12 part on the lower in the rear portion of supporting base 5 and the chair back 11.

When seat support 6 never the use location towards the use location (with reference to Fig. 3) and when rotating, the bottom of the chair back 11 is rearward pressed by this pressure rod 13, make the chair back 11 keep the state of erecting, and, when elastic shrinkage occured for pressure rod 13, the chair back 11 can overcome the elastic-restoring force of this pressure rod 13 and hypsokinesis as shown in Figure 4.

As Fig. 2 and shown in Figure 5, the ratio pivot 9 of the two sides 5a in the front portion that expands of handrail 14 and supporting base 5 links by the position at rear.As shown in Figure 1, this handrail 14 comprises handrail post 15 and soft elbow pad (elbow pad member) 16, described handrail post 15 erects by the below of seat support 6 and above the lateral direction of seat support 6 from supporting base 5, be inside L font under main looking, elbow pad 16 is fixed in the upper end of handrail post 15.

As shown in Figure 2, the part that erects of the side from seat support 6 in handrail post 15 width that forms fore-and-aft direction under side-looking is observed towards above become gradually the loop-like of large general triangular.The rear surface, top of handrail post 15 under side-looking is observed to tilt to the back upper place with the roughly the same curved surface of the sidepiece front surface of the chair back 11.Need to prove, the top of handrail 14 is not limited to be loop-like under side-looking is observed, and can form the shape arbitrarily such as the L font that is downward under side-looking is observed.

Here, with reference to Fig. 6 and Fig. 7, an example of the installation constitution of the handrail 14 in the chair of this Armrest (handrail post 15) is described.As Fig. 6 and shown in Figure 7, being provided with for the installation portion 17 to supporting base 5 installations towards interior side's bottom front end of handrail post 15 in handrail 14 is provided with the section that is mounted 18 that the installation portion 17 of handrail 14 is installed on the anterior side 5a that expands of supporting base 5.

Installation portion 17 at handrail 14 is established forked a pair of

fitting projection

17a, 17b along fore-and-aft direction, is provided with recess 17c between a pair of fitting projection 17a,

17b.Fitting projection

17a, 17b form the quadrangular of inswept.And the width between the width between the lateral surface of the up and down of

fitting projection

17a, 17b and the lateral surface of front and back is along with narrowing down gradually towards the front end of

fitting projection

17a, 17b, and the lateral surface of up and down and front and back forms taper.

Width between the medial surface of the front and back of the recess 17c between

fitting projection

17a, 17b is along with towards inboard and narrow down gradually, and the medial surface of front and back forms the back taper opposite with the lateral surface of fitting projection 17a, 17b.The outstanding size of the maximum of recessed depth ratio fitting projection 17a, the 17b of recess 17c is shallow.

Width between the up and down of

chimeric recess

18a, 18b and the medial surface of front and back is along with towards the inboard of

chimeric recess

18a, 18b and narrow down gradually, and the width between the lateral surface of the front and back of the teat 22 between

chimeric recess

18a, 18b is along with towards the front end of teat 22 and narrow down gradually.The lateral surface of teat 22 forms the back taper opposite with the medial surface of

chimeric recess

18a, 18b.

As shown in Figure 6, the outstanding size of teat 22 is less than the recessed size of the maximum of recess 18a, 18b.Be provided with towards the base portion of teat 22 and be through to the screwed hole 23 of the medial surface of supporting base 5 at the front end face of teat 22.

Downside at the installation portion 17 of handrail post 15 is provided with recess 19, is provided with the screw insertion hole 20 that connects to the bottom surface of recess 17c in the bottom surface of this recess 19.In addition, be provided with flange part 24 with peripheral part butt of the section that is mounted 18 of supporting base 5 around installation portion 17.

When the installation portion 17 of handrail 14 is installed to the section that is mounted 18 of supporting base 5, a pair of

chimeric recess

18a, 18b and the teat 22 of a pair of fitting projection 17a, the 17b of handrail post 15 and recess 17c and supporting base 5 is chimeric, the screw 21 that will pass from the recess 19 that the spot-facing of handrail 14 is used afterwards screw insertion hole 20 is screwed together in the screwed hole 23 of the teat 22 of supporting base 5, thus with installation portion 17 be mounted section 18 and carry out fastening from the chimeric direction of

fitting portion

17a, 17b and

chimeric recess

18a, 18b.

Constitute the chair of Armrest of said structure under not use state shown in Figure 2, active force by force application mechanism 10 lifts the rear portion of seat support 6 upward, seat support 6 is positioned at the not use location that tilts to the back upper place, and the elongation of the chair back 11 by pressure rod 13 is held in roughly the set-up positions towards the top.

In addition, under the not use state of Fig. 2, rearward can not clip the gap of this degree of hand during mobile hand as the person of taking a seat being provided with between the sidepiece front surface of the rear surface, top of the handrail post 15 of handrail 14 and the chair back 11 to overlook under observation.As shown in Figure 1, the handrail 14 of left and right, 14

handrail post

15,15 and the lower surface of seat support 6 and side between also be provided with the gap.Thereby handrail 14 can not hinder the rotation of seat support 6.

Under this state, when the person of taking a seat took a seat, seat support 6 overcame the active force of force application mechanism 10 and turns to use location shown in Figure 3, thereby making the person of taking a seat can obtain rapidly the suitable posture that takes a seat under the effect of the person's of taking a seat weight.At this moment, the chair back 11 that is installed on seat support 6 also overcomes the active force of pressure rod 13 and moves to the back lower place.The rear surface of handrail 14 tilts towards the back upper place, therefore, when the chair back 11 moves to the back lower place, the bottom of the handrail 14 that often approaches the closer to the person's of taking a seat hand and clothes, just wider with the interval of the chair back 11.Thereby can reduce, hand or article are sandwiched danger in this gap.

When the person of taking a seat leaned on back in the chair back 11, back rearward to be lied down from the state of taking a seat shown in Figure 3, the chair back 10 made pressure rod 13 elastic shrinkage and centered by bolster 12 and turn to reclined position shown in Figure 4.

When the person's of taking a seat back returned to the place ahead, the chair back 11 forwards rotated centered by bolster 12 and is back to initial set-up positions under the effect based on the elongation of elastic-restoring force of pressure rod 13.

When the person of taking a seat will stand from the state of taking a seat shown in Figure 3, seat support 6 was biased mechanism's 10 application of forces in the mode of upwards rotating towards use location not, thereby can assist standing up of the person of taking a seat.

At this moment, although seat support 6 and the chair back 11 move to the so not use location of Fig. 2, because handrail 14 is linked to supporting base 5, so it is highly constant.

Thereby, even for example the person of taking a seat from the situation that the state that seat support 6 takes a seat and make handrail 14 to enter under the panel of desk begin to stand, interval between the panel of handrail 14 and desk can not change yet, handrail 14 not can with the panel butt, can use safely handrail 14.

Need to prove, also can fitting projection be set in the section that is mounted 18 of chair 5, at the installation portion 17 of handrail 14, chimeric recess is set.In addition, handrail 14 is not limited to be installed on supporting base 5, and seat support, the chair back or the chair back cramp bar etc. that also can be installed on chair are structure member arbitrarily.In this case, when handrail 14 is installed to the parts of overlooking under observation towards the place ahead or the rear width broadens, preferably be installed on the part that width broadens.

Next, with reference to Fig. 8～Figure 14, an example of the installation constitution of the elbow pad 16 in the chair of this Armrest is described.As shown in Figure 8, between the top part on the loop-like top of handrail post 15 and the first section and be respectively equipped with

bend

15a, 15b between top part and back part.

Be provided with recess 25 in the upper end of handrail post 15, this recess 25 has the aperture area with elbow pad 16 same size, and front end arrives bend 15a midway, these recess 25 formation elbow pad installation portions 26.

Elbow pad 16 forms elongated lamellar of fore-and-aft direction, and forwardly is provided with the bend 16a to the bending of oblique below.In addition, as shown in figure 10, elbow pad 16 is by soft parts 16b and the integrated parts of hard part 16c are consisted of.

As Fig. 8 and shown in Figure 10, above being provided with on the left and right medial surface at the rear end of the recess 25 of handrail post 15 and rear portion and the rear by inaccessible and towards the place ahead and the hook-type of interior side's opening be stuck sheet 26a～26c (with reference to Figure 13), above being provided with on the left and right medial surface of the front portion of recess 25 and fore-and-aft direction by inaccessible and towards recess (connecting hole) 26d, the 26e (with reference to Figure 14) of interior side's opening, in addition, be provided with recess 26f towards upper opening at the leading section of recess 25.Recess 26f is due to the bend 15a in the front portion that is arranged on handrail post 15, therefore be stuck sheet 26a～26c and compare and be positioned at the below.

As Fig. 9 and shown in Figure 10, be provided with the hook-type snap-latch piece 27a～27c (with reference to Figure 13) outstanding towards the rear in the rear end of the peripheral part 27 of elbow pad 16 and the both sides at rear portion, left and right sides section in the front portion of the peripheral part 27 of elbow pad 16 is provided with elasticity snap-latch piece 27d, the 27e (with reference to Figure 14) of the elastically deformable outstanding towards the left and right directions outside, in addition, leading section be provided with towards below outstanding protuberance 27f.Protuberance 27f is due to the bend 16a that is arranged on elbow pad 16, therefore compares with snap-latch piece 27a～27c to be positioned at the below.

When elbow pad 16 is installed to handrail post 15, as shown in figure 11, with elbow pad 16 with than with elbow pad installation portion 26 over against position mode slightly on the front load in the upper end of handrail post 15.Then, if elbow pad 16 is rearward slided, as Figure 12 and shown in Figure 13, the snap-latch piece 27a～27c of elbow pad 16 engages with the sheet 26a～26c that is stuck of handrail post 15 from the place ahead.

Next, if the front portion of elbow pad 16 is pressed downwards, as Figure 12 and shown in Figure 14, the protuberance 27f of elbow pad 16 is chimeric from the recess 26f of top and handrail post 15.In addition, elasticity snap-latch piece 27d, the 27e of elbow pad 16 move downwards in inside side's strain, engage with recess 26d, the 26e of handrail post 15 by elastic-restoring force.Thus, elbow pad 16 is installed on handrail post 15 reliably under the state of the recess 25 of inaccessible handrail post 15.

Under this state, because

recess

26d, 26e form top and fore-and-aft direction by inaccessible and towards the shape of interior side's opening, therefore, even the front portion of anconad pad 16 effect has the power of above-below direction and fore-and-aft direction, the front portion that also can effectively suppress elbow pad 16 is the situation of direction and fore-and-aft direction dislocation up and down.

In the installation constitution of this elbow pad, only the snap-latch piece 27a～27c by making the rear portion in elbow pad 16 and anterior protuberance 27f be sticked in handrail post 15 elbow pad installation portion 26 be stuck sheet 26a～26c and recess 26f, just can easily elbow pad 16 be installed on handrail post 15.In this case, can make towards the opposite enforcement the in front and back of handrail post 15 and elbow pad 16.In addition, also can with the recess 25 of handrail post 15, be stuck that the identical parts such as sheet 26a～26c and recess 26d～26f spin upside down and the lower surface that is arranged on elbow pad 16, and will the parts identical with snap-latch piece 27a～27c, elasticity snap-

latch piece

27d, 27e and the protuberance 27f etc. of the lower surface of elbow pad 16 spin upside down and be arranged on the elbow pad installation portion 26 of handrail post 15.

namely, in the installation constitution of this elbow pad, at the elbow pad installation portion 26 of the upper end of handrail 14 and the either party's in elbow pad 16 rear portion or anterior arrange towards the place ahead or the hook-type of rear opening is stuck sheet 26a, and in the elbow pad installation portion 26 of the upper end of handrail 14 and the either party's in elbow pad 16 front portion or the rear portion recess 26f towards the above-below direction opening is set, the opposing party in elbow pad installation portion 26 and elbow pad 16 be stuck sheet 26a opposed position and arrange towards the rear or the hook-type snap-latch piece 27a of front openings, and the arranging towards the outstanding protuberance 27f of above-below direction with recess 26f opposed position of the opposing party in elbow pad installation portion 26 and elbow pad 16, by making snap-latch piece 27a and being stuck sheet 26a and engaging, and protuberance 27f is engaged with recess 26f, thus elbow pad 16 is installed on the upper end of handrail 14.

thus, only the upper hook-type snap-latch piece 27a that arranges of the elbow pad installation portion 26 by making handrail 14 and the either party in elbow pad 16 is sticked in the upper hook-type that arranges of the opposing party and is stuck sheet 26a, and make the upper protuberance 27f that arranges of either party in elbow pad installation portion 26 and elbow pad 16 be embedded in the recess 26f that the opposing party arranges from the top, just can in the situation that do not make elbow pad 16 significantly strain it is installed on the section that is mounted of handrail 14 reliably, thereby need to not make elbow pad 16 etc. by the thick parts of softness, can not be subjected to the restriction of material and the shape of elbow pad 16, improve the design freedom of handrail 14.

And then, by arranging recess 26f and protuberance 27f than being stuck sheet 26a and snap-latch piece 27a on the lower, can make protuberance 27f be embedded in recess 26f after being stuck sheet 26a snap-latch piece 27a is sticked in thus, therefore can make the installation exercise of elbow pad 16 easier.At this moment, by the front portion at the elbow pad installation portion 26 of handrail 14 arrange towards below crooked bend 15a, and at bend 15a, recess 26f or protuberance 27f are set, can arrange recess 26f and protuberance 27f than being stuck sheet 26a and snap-latch piece 27a on the lower with simple structure thus.

In addition, due to be respectively equipped with at the elbow pad installation portion 26 of handrail post 15 and elbow pad 16 towards below

crooked bend

15a, 16a, therefore, when when the elbow pad installation portion 26 that is sticked in handrail post 15 for the rear portion that makes elbow pad 16, elbow pad 16 rearward being slided, do not need significantly to lift the front portion of elbow pad 16.Namely, only by under the state that elbow pad 16 staggered positions is positioned on elbow pad installation portion 26, elbow pad 16 is rearward slided and make the rear portion of elbow pad 16 be sticked in elbow pad installation portion 26, afterwards the front portion of elbow pad 16 is pressed downwards, just can make simply the front portion of elbow pad 16 be sticked in elbow pad installation portion 26.It is easy that thereby the installation exercise that makes elbow pad 16 becomes.

And then, elasticity snap-latch piece 27d, the 27e of elbow pad 16 is as long as be sticked in recess 26d, the 26e of handrail post 15 by elastic-restoring force, therefore can reduce the width of its above-below direction, thus can whole attenuate elbow pad 16, and then elbow pad 16 can be installed on handrail 14 more reliably.

Symbol description

1 castor

2 chair leg bars

3 chair leg bodies

4 chair leg posts

5 supporting bases

The 5a side

6 seat supports

7 chair seat boards

8 bolsters

9 pivots

10 force application mechanisms

11 chair back

12 bolsters

13 pressure rods

14 handrails

15 handrail posts

15a, 15b bend

16 elbow pads

The 16a bend

The soft parts of 16b

The 16c hard part

17 fitting portions

17a, 17b fitting projection

The 17c recess

18 by fitting portion

The chimeric recess of 18a, 18b

19 recesses

20 screw insertion holes

21 screws

22 teats

23 screwed holes

24 flange parts

25 recesses

26 elbow pad installation portions

26a～26c is stuck sheet

26d～26f recess

27 installation portions

27a～27c snap-latch piece

27d, 27e elasticity snap-latch piece

The 27f protuberance

Claims

1. the chair of an Armrest, is characterized in that, possesses:

Supporting base, it is supported by the chair leg;

Seat support, it is pivotally connected to described supporting base by the pivot towards left and right directions, and rotate at the rear portion of this seat support direction up and down;

Force application mechanism, it is located at described supporting base, and to the described pivot of ratio in seat support by the rear portion at the rear application of force that makes progress;

Handrail, its underpart and described supporting base link, and top erects from the outer side of described seat support.

2. the chair of Armrest according to claim 1, wherein,

Described supporting base forms the shape that expands towards the place ahead under observation overlooking, and tilts towards the front upper place under side-looking is observed, and the side of the front portion of described handrail and described supporting base links.

3. the chair of Armrest according to claim 2, wherein,

The ratio top side's in rear portion of described seat support and described supporting base is anterior pivotally connected, and the described pivot of ratio in described handrail and described supporting base links by the position at rear.

4. the chair of the described Armrest of any one according to claim 1～3, wherein,

Described handrail possesses at the main handrail post of the L font that is inside under observation and the elbow pad member that arranges in the upper surface of handrail post looked, and described handrail post erects by the below of described seat support and above the lateral direction of described seat support from described supporting base.

5. the chair of Armrest according to claim 1, wherein,

either party at the installation portion of installing to the described section of being mounted of the section that is mounted of the chair that the handrail of the side that is arranged in described seat support is installed and handrail establishes forked fitting projection, establish forked chimeric recess described the opposing party in being mounted section and described installation portion, width between the lateral surface of described fitting projection is along with towards the front end of fitting projection and narrow down gradually, and the width between the medial surface of described chimeric recess is along with towards the inboard of chimeric recess and narrow down gradually, described a pair of fitting projection and at the recess between a pair of fitting projection and described a pair of chimeric recess and the teat tabling between a pair of chimeric recess, by retention mechanism with described installation portion with described to be mounted section fastening from the chimeric direction of described fitting projection and described chimeric recess.

6. the chair of Armrest according to claim 5, wherein,

The section of being mounted of described chair is located in the part of overlooking under observation towards the place ahead or the width of the structure member that the rear width broadens broadens.

7. the chair of according to claim 5 or 6 described Armrests, wherein,

Be provided with screwed hole from the front end face of the teat between described a pair of chimeric recess towards the base portion of teat, bottom surface at the recess between described a pair of fitting projection is provided with screw insertion hole, is screwed together in described screwed hole and the installation portion of described handrail is anchored on the section that is mounted of described chair by the screw that will pass screw insertion hole.

8. the chair of Armrest according to claim 5, wherein,

Be provided with around installation portion in described handrail with described chair in the section that is mounted around the flange part that connects of part.