CN201091371Y

CN201091371Y - Seat adjusting backrest inclination angle

Info

Publication number: CN201091371Y
Application number: CNU200720052741XU
Authority: CN
Inventors: 蔡国良
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-09
Filing date: 2007-06-09
Publication date: 2008-07-30
Anticipated expiration: 2017-06-09

Abstract

The utility model relates to a chair, the backrest inclination angle of which can be adjusted, comprising a backrest and a chair seat, the two sides of the backrest are pivotally connected at the two sides of the seat, the bottom of the seat is provided with a mounting bracket, and an elastic angle adjusting device is arranged between the backrest and the mounting bracket and comprises a shaft pin, a positioning cap, an offsetting spring, a telescopic link, a knob and a lead screw, wherein, the telescopic link has a movable bar, a fixed link and a shaft pin switch port; one end of the lead screw is connected with the mounting bracket, and the other end is connected with the movable bar; the knob is in hollow structure and is provided with internal thread on the inner wall of one end and a positioning step in the middle, the thread at the internal thread end of the knob is connected on the lead screw; the offsetting spring and the positioning cap are sheathed and connected on the fixed link end of the telescopic link, one end of the offsetting spring is positioned in the knob and leans against the positioning step, the other end of the offsetting spring leans against the head face of the positioning cap; the shaft pin passes through the shaft pin switch port of the telescopic link to be mounted and fixed on the backrest. By adopting the structure, the elastic angle adjusting device of the chair bears less force, has stable elastic coefficient and adjustable elasticity.

Description

The seat that the backrest inclination angle is adjustable

Technical field

The utility model belongs to technical field of furniture manufacturing, relates to a kind of seat, is specifically related to the adjustable seat of a kind of backrest inclination angle.

Background technology

The present adjustable seat of backrest inclination angle, mainly form by backrest and seat support, backrest is installed on the seat support by an elastic connecting device, during use, main back by human body applies a power backward to backrest, make the elastic connecting device between backrest and the seat support produce strain, thereby change the angle of inclination of backrest.Existing this class seat, the support of its backrest mainly relies on elastic connecting device, requires elastic connecting device need have bigger support strength and coefficient of elasticity good stability, and is therefore very high to manufacturing technique requirent, must increase the production cost of seat.In addition, the elastic force of seat elastic connecting device is a fixed value, in real life, seat may be by not people's use of consubstantiality bone, Different Weight, if the elastic force of elastic connecting device is fixed value, in the time of above an individual bone athlete is sitting in, the back may be leaned on toward backrest one, under self gravitation, backrest has just backed tilt to maximum angle, backrest can't be controlled at the angle of the most comfortable; Otherwise women that stature is comparatively petite or child are sitting in when top, and the back need apply a very large power to backrest could be with the backrest hypsokinesis to maximum angle.And the elastic force that does not also have a kind of elastic connecting device of seat in the market is adjustable, and the people that can't satisfy various not consubstantiality bones uses.

Summary of the invention

The purpose of this utility model is to provide that a kind of elastic angle adjusting device load is less, coefficient of elasticity is stable and the elastic force adjustable seat, when the people of various not consubstantiality bones is used, can both better control the hypsokinesis angle of backrest.

The purpose of this utility model is achieved in that the adjustable seat of a kind of backrest inclination angle, comprise backrest, seat support, the backrest both sides are articulated in the both sides of seat support, and seat bottom is provided with a mounting bracket, are provided with the elastic angle adjusting device between backrest and the mounting bracket.

Described elastic angle adjusting device comprises pivot pin, positioning cap, back-moving spring, expansion link, knob and screw mandrel, wherein expansion link has a motion bar, a fixed bar and is positioned at the pivot pin connecting hole of fixed bar end, motion bar can be in fixed bar elastic moving; Described screw mandrel one end is connected on the mounting bracket, and the other end is connected with the motion bar of expansion link; Described knob is a hollow structure, and at one end inwall offers internal thread, and the centre is provided with a location step, and the female end of knob is threaded on the screw mandrel; Described back-moving spring, positioning cap are socketed in the fixedly rod end of expansion link, and an end of back-moving spring is positioned at knob and is resisted against on the positioning step, and the other end is resisted against the end face of positioning cap; Described pivot pin is positioned at the outside of positioning cap, and the pivot pin connecting hole that passes expansion link is fixed on the backrest.

Be provided with damping pad between the fixed bar of described expansion link and the motion bar.

Described knob lateral wall has the friction striped.

Good effect of the present utility model: the both sides that the backrest both sides are articulated in seat support, be provided with a mounting bracket in seat bottom, one elastic angle adjusting device is installed between backrest and the mounting bracket, adopt this connected mode, back rest supports is supported by the elastic angle adjusting device no longer separately, its both sides pivoting point can be born the power of major part, reduced requirement like this to the support strength of elastic angle adjusting device, therefore, production technology can significantly reduce, reduce production cost, and the stability of coefficient of elasticity can be better.

As further improvement of the utility model, the elastic angle adjusting device is made up of pivot pin, positioning cap, back-moving spring, expansion link, knob and screw mandrel etc., relative position by adjusting knob and screw mandrel, can regulate back-moving spring collapsing length, thereby change the elastic force size, satisfy not consubstantiality bone human needs to reach.

Contracting is provided with damping pad between the fixed bar of bar and the motion bar, reduces hard impact, and by sitting to lying when changing, stable action feels comfortable.

The knob lateral wall has the friction striped, the friction of increase and hand during adjusting, and hand is difficult for skidding in adjustment process.

Description of drawings

Fig. 1 is the seat stereogram;

Fig. 2 is the explosive view of elastic angle adjusting device;

Fig. 3 is the knob structure schematic diagram.

The specific embodiment

Below in conjunction with accompanying drawing the utility model specific embodiment is described in further detail.

The specific embodiment: as Figure 1-3, the adjustable seat of backrest inclination angle described in the utility model, comprise backrest 1, seat support 2, backrest 1 supported on both sides frame 10 is articulated in 20 places, two side ends limit of seat support 2, seat support 2 bottoms are provided with a mounting bracket 3, be provided with elastic angle adjusting device 4 between backrest 1 and the mounting bracket 3, this elastic angle adjusting device 4 is mainly by pivot pin 40, positioning cap 41, back-moving spring 42, expansion link 43, parts such as knob 44 and screw mandrel 45 are formed, wherein expansion link 43 has a motion bar 430, one fixed bar 431 and be positioned at the pivot pin connecting hole 432 of fixed bar end, motion bar 430 1 ends are positioned at fixed bar 431, and can move forward and backward in fixed bar 431, expansion link 43 can adopt cylinder, oil cylinder etc.; Described screw mandrel 43 1 ends are connected on the mounting bracket 3, and the other end is connected with the motion bar 430 of expansion link 43; Described knob 44 is a hollow structure, and at one end inwall offers internal thread 440, and the centre is provided with a location step 441, and the female end of knob 44 is threaded on the screw mandrel 45; Described positioning cap 41, back-moving spring 42 are socketed in fixed bar 431 ends of expansion link 43, and an end of back-moving spring 42 is positioned at knob 44 and is resisted against on the positioning step 441, and the other end is against the end face of positioning cap 41; Described pivot pin 40 is positioned at the outside of positioning cap 41, and the pivot pin connecting hole 432 that passes expansion link 43 is fixed on the backrest 1.Installation process is as follows: at first motion bar 430 ends with expansion link 43 are connected with screw mandrel 45, can adopt screw to connect, welding or connected mode such as be threaded, female end screw thread with knob 44 is tightened on the screw mandrel 45 then, other end opening is towards fixed bar 431, again positioning cap 41, back-moving spring 42 be socketed in fixed bar 431 on, positioning cap 41 is applied the pressure towards screw mandrel 45 ends, back-moving spring 42 length shorten certain distance a little, make positioning cap 41 be positioned at the right-hand member of pivot pin connecting hole 432, be located in pivot pin 40 on the pivot pin connecting hole 432 of expansion link 43 this moment, at last pivot pin 40 is installed on the backrest 1, screw mandrel 45 ends are installed in promptly to assemble on the mounting bracket 3 and finish.During use, go adjusting knob 44 to be positioned at position on the screw mandrel 45 according to different users's build, when women that stature is petite or child use, knob 44 is screwed to the right-hand member of screw mandrel 45, the collapsing length of back-moving spring 42 is transferred to than long status, this moment, back-moving spring 42 elastic force were less, only need during use that backrest 1 is applied less power and just can apply a pressure that is enough to make back-moving spring 42 generation compressions by 1 pair of back-moving spring 42 of backrest, after back-moving spring 42 compressions, the motion bar 430 of compressing expansion link 43 moves to fixed bar 431 ends, the total length of expansion link 43 is changed, thereby change the backrest inclination angle.And when using for the stature athlete, then knob 44 is transferred to the left end of screw mandrel, make the collapsing length of back-moving spring 42 shorter, at this moment, back-moving spring 42 elastic force are bigger, need the back that backrest 1 is applied certain strength during use equally and could allow back-moving spring 42 further compress, the total length of expansion link 43 is changed, go to control the optimum tilt angle of backrest 1.In order to make backrest 1 switching motion steady, between the fixed bar 431 of expansion link 43 and motion bar 430, be provided with damping pad 433, in addition, regulate rotation 44 for convenience, have friction striped 442 at its lateral wall, hand skids when preventing to regulate.

Claims

1. the seat that the backrest inclination angle is adjustable comprises backrest, seat support, it is characterized in that: the backrest both sides are articulated in the both sides of seat support, and seat bottom is provided with a mounting bracket, are provided with the elastic angle adjusting device between backrest and the mounting bracket.

2. the adjustable seat of backrest inclination angle according to claim 1, it is characterized in that: described elastic angle adjusting device comprises pivot pin, positioning cap, back-moving spring, expansion link, knob and screw mandrel, wherein expansion link has a motion bar, a fixed bar and is positioned at the pivot pin connecting hole of fixed bar end, motion bar can be in fixed bar elastic moving; Described screw mandrel one end is connected on the mounting bracket, and the other end is connected with the motion bar of expansion link; Described knob is a hollow structure, and at one end inwall offers internal thread, and the centre is provided with a location step, and the female end of knob is threaded on the screw mandrel; Described back-moving spring, positioning cap are socketed in the fixedly rod end of expansion link, and an end of back-moving spring is positioned at knob and is resisted against on the positioning step, and the other end is resisted against the end face of positioning cap; Described pivot pin is positioned at the outside of positioning cap, and the pivot pin connecting hole that passes expansion link is fixed on the backrest.

3. the adjustable seat of backrest inclination angle according to claim 2 is characterized in that: be provided with damping pad between the fixed bar of described expansion link and the motion bar.

4. the adjustable seat of backrest inclination angle according to claim 2 is characterized in that: described knob lateral wall has the friction striped.