CN2040736U - Folding chair with movable back-rest - Google Patents

Abstract

The utility model discloses a folding chair with movable back-rest. The chair seat of the folding chair with movable back-rest is separated from chair legs, and the chair seat is hung over the chair legs by a backrest and two connecting handles. The folding chair with movable back-rest is provided with feet supports, and the feet supports are connected with the chair seat; both sides of the feet support and both sides of the backrest are connected by two transmission handles, and the transmission handles are divided into plurality sections. Because the structure is adopted, the included angle between the backrest of the folding chair with movable back-rest and the chair seat can be randomly adjusted without levels, and the adjustment is automatically finished with the bending backward and bending forward of the upper body of the user. The feet supports are not supported in general situation, but the feet supports are supported when the bending backward and bending forward of the upper body of the user are reached the limitation.

Description

Folding chair with movable back-rest

The utility model relates to the movable folding seat of a kind of backrest, and the angle of this back and seat can change.

Mostly the movable chair of our seen backrests at present, its backrest activity are that handrail finishes by pulling.The iron plate on the handrail is equipped with one vertically, is vertically fixed on below the handrail of this class chair, have many sulculuses on the iron plate, formed a series of that be arranged in order, each other the causing hooked tooth of space and intercommunication arranged, the screw hook on these causing hooked tooth and chair leg top has just formed the angle of backrest and seat, the causing hooked tooth of different order and the hook of chair leg screwing, just formed different angles, the conversion of angle is by pulling handrail and change the order of causing hooked tooth and screw hook and realizing.Like this, every conversion is angle once, will pull handrail, and is cumbersome; In addition, because the arrangement of causing hooked tooth is the one-level one-level, the conversion of angle only is confined on several fixed positions, and the position between level and the level all becomes the dead angle, and this has just limited the function of chair; In addition, this class chair does not have foot support, and seat person's pin is leant on the ground for a long time, is unfavorable for having a rest better.In addition, the movable chair of a kind of backrest is arranged, the exchange of the angle of its backrest and seat is on the contrary stepless, the foot support the sort of chair of lying and can sit of barber shop (as be common in) is also arranged, but the conversion of its backrest and seat is the mutual coordinative role by backrest and foot support to be realized: become mitre, seat person palpus lean forward from the waist, shank presses down, quite like the seesaw in park, therefore, the amplitude of angle conversion is difficult to control for its motion principle and form, the swing of backrest always slides into another limit from a limit, can not regulated at will, as want to allow backrest pause at intermediate range, probably seat person's muscle will keep certain tensity.In addition, because the cooperation of the action need foot support of backrest, those lower limb are incomplete to have the disease patient just to be difficult to use with some lower limb.

The purpose of this utility model be for angle that a kind of backrest and seat are provided can be arbitrarily in the limit, step-less adjustment and have the folding seat of foot support.The conversion of its backrest and seat angle does not need plate to move any office, be not subjected to the restriction of foot support yet, only need leaning forward or swing back and just can regulating automatically of seat person upper body, its foot support is not propped up in the big portion scope of backrest activity, and just props up when backrest is swung back the limit.

Its solution is: seat separates with the chair leg, by two connection handles that are connected seat two middle side parts and the backrest that is connected in the seat rear end seat is hung on the chair pin, make seat resemble the swing can before and after stepless swing; Be flexible connection between foot support and the seat; Be connected by two transfer handles between foot support and the backrest, to transmit merit from backrest; For fear of foot support at any time with backrest swing be convenient to fold, every transfer handle be divided into be connected with each other, can tortuous three movable joints, last joint is connected foot support two side lower parts, back one joint is connected backrest two side lower parts, one joint transfer handle top, back has an elbow that bends towards backrest, plays barrier effect, so that when making backrest run to a certain degree backward, back one joint transfer handle is done the one motion with backrest, promotes the transfer handle operation of front; An elbow that bends towards foot support is arranged at the top of last joint transfer handle, works to prop up foot support and makes it to prop up; Among last joint transfer handle and the middle joint transfer handle either party has one to clamp the other side, U-lag or the elbow that Open Side Down in both junctions, to limit both scopes of activities, both are fused when backrest is swung back to a certain degree become support bar, the feet support.

Owing to adopted above-mentioned structure, the movement characteristic of this chair is at unusual a bit, general backrest tip-up seat, and the conversion of its backrest and seat angle all is that the activity by the backrest folk prescription realizes, and the conversion of this chair back and seat angle, then activity is by both party finished.Its motion forms and plays on a swing that some is similar, plays on a swing but be different from, and swing ends the person of taking advantage of just can reduce amplitude of fluctuation after doing work gradually, drops to plumbness at last.And this chair is after the seat person stops acting, and seat and backrest can keep original gradient, can not change angle, downward ripple slip.This be because the structure applications of this chair the principle of mechanics.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is the side view of the utility model one embodiment.

Fig. 2 Fig. 3 is the side view of the carry-on movable folding seat of backrest when using.

Fig. 4 is the view of more piece connection handle.

As shown in Figure 1, foreleg (1) and back leg (2) are the Eight characters thirty years of age, two leg and are connected by the connection handle that is connecting handrail (3) (4) and other three joint connection handles (5), (6), (7).Like this, the chair leg promptly can be stood firm and be collapsible.About from top to bottom 2/3rds places of backrest (8) are connected the back leg upper end as tie point with screw (9), seat (10) brace (11) and screw (12), (13) link to each other with backrest (8), seat (10) both sides connect two connection handles (14), the top of connection handle (14) links to each other with preceding chair leg (1) with screw (15), foot support (16) top brace (17) and screw (18), (19) link to each other with seat (10), foot support (16) bottom links to each other with more piece transfer handle (21) with screw (20), and the other end of more piece transfer handle (21) is connected backrest (8) bottom sides that extends under the seat (10) with screw (22); More piece transfer handle (21) is divided into three joints, connects with rivet (23), (24).As shown in Figure 4, back one end that links to each other with backrest of joint transfer handle has one to play barrier effect to the curved elbow (25) of backrest direction and can move with the backrest promotion transfer handle in front that strike up partnership to guarantee back-to-back running this joint transfer handle to a certain degree the time; Front one a joint transfer handle and a middle joint transfer handle link to each other local widely goes out one side and folds back, form " U " shape groove (26) that Open Side Down, the end that the intermediate transfer handle joins is with it clamped, so both made the connection of this two joints transfer handle firm, make the limitation of activity of the two again, to guarantee that the two can be connected as a single entity when propping up at foot support (16), play a supportive role, there is one to the curved elbow (27) of foot support direction with " U " shape groove (26) adjacent on the last transfer handle, work to prop up foot support (16) and promote its rising, on the prosthomere transfer handle with the tie point of foot support near have one to the curved elbow (28) of foot support direction to limit the scope of activities of this joint transfer handle, when being convenient to the foot support landing, the reduction of more piece transfer handle.

When seat person lean back with the trunk, as shown in Figure 2, backrest (8) is that the fan-like pattern motion is done in the axle center with the tie point with chair leg (2), seat (10) is made diagonal movement to the front upper place, increasing along with motion amplitude, the angle that extends between following backrest (8) bottom of seat (10) and the back one joint transfer handle is more and more littler, elbow (25) on the one joint transfer handle of back stumbles backrest (8), at this moment back one transfer handle and backrest (8) are become one, transfer handle in the middle of promoting moves forward, when running to a certain degree, elbow (27) on the last joint transfer handle has propped up foot support (16), begins to promote foot support (16) and rises, when backrest (8) limit of swinging back, foot support (16) is propped up, as shown in Figure 3 state.

Because the utility model has adopted unique structure, make folding chair with movable back-rest have sound freely, the random characteristics of pitching, the adjusting that the angle of its backrest and seat is automatic, stepless with the pitching of human body is further improved the effect of chair, serves better people.

Claims (1)

1, a kind of folding seat of the band foot support of forming by seat, chair leg, handrail, backrest, backrest is movable with respect to seat, it is characterized in that: seat (10) separates with chair leg (1,2), is hung on the chair leg (1,2) by two connection handles (14) that link to each other with seat (10) and backrest (8); For flexibly connecting, foot support (16) two side lower parts are linked to each other by two more piece transfer handles (21) with backrest (8) two side lower parts between foot support (16) and the seat; This transfer handle is divided into three joints, connects for hinge type between three joints; The deutomerite transfer handle that links to each other with backrest (8) bottom has one towards the curved elbow (25) of backrest direction, thereby when making backrest (8) run to a certain degree, this joint transfer handle can be made one with backrest (8) and move; Prosthomere transfer handle that links to each other with foot support (16) or middle segmentum intercalaris transfer handle have one to clamp the other side, U-lag (26) or the elbow that Open Side Down at the place of being connected to each other, an elbow (27) that bends towards foot support (16) direction is arranged on the top of prosthomere transfer handle, thereby foot support when swinging back extreme position, is lifted on backrest (8), and segmentum intercalaris and prosthomere transfer handle fuse in making, and become support bar.

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