CN102860685A - Chair - Google Patents

Abstract

A chair, which belongs to the field of furniture articles, comprises a chair back, a stool and an armrest arranged on the stool, and a hinge part is arranged on the chair back, which is hinged with the armrest; the hinge part includes a rotating shaft and the The armrest is provided with a through hole corresponding to the position of the rotating shaft, the lower end of the chair back is provided with a blocking part, and the armrest is provided with a blocking part matched with the blocking part for limiting the rotation angle of the chair back. In the present invention, the chair back is hinged with the armrest, and a blocking part is arranged on the armrest, so that the chair back can be folded and can be kept horizontal with the stool at the maximum rotation angle. In this way, there is no need to install other transmission parts such as bearing seats, which reduces the weight and cost of the chair, and because the main parts are installed on the armrest, it is easy to manufacture, easy to install, easy to maintain, and convenient to transport and reduce storage space. .

Description

a chair

technical field

The present invention relates to an article of furniture, especially for chairs.

Background technique

There are many kinds of chairs on the market now. There is a kind of chair whose back can be turned over. Its advantage is that it can suit the preferences of different people, freely adjust the angle of the back of the chair, and reduce storage space during storage and transportation. The chair also has a problem: the structure is complex, especially the transmission parts are many, the cost is high, and it will be troublesome to maintain in the future.

Such as patent CN200510078651.3, a seat with a seat back synchronous coordination system, the base of this patent is hinged with the seat back by extending the column above the seat cushion, and the hinge point is located at the greater trochanter point of the human body (the center point of the hip joint) ) place. The seat sets the hinge point of the chair back and the base on the large rotor point when the human body tilts, so that when the chair back rotates (tilts or tilts) and the pivot of the human body rotates (tilts or tilts) on the same straight line, so no matter what angle the back of the chair is adjusted to, the contact surface between the back of the human body and the back of the chair will not change, so that the back of the chair can provide sufficient support for the waist at any angle, so that the seated person There will be no discomfort. In this way, the back of the chair can indeed provide a good supporting force, but the transmission parts of the back of the chair are too complicated, and under the comparison of the market economy, this kind of seat lacks aesthetic feeling, and there are too many parts arranged outside the chair, which affects the performance of the chair. overall aesthetics.

Contents of the invention

The object of the present invention is to solve the above technical problems and provide a seat with a freely rotatable back, a simple structure and easy installation.

The technical solution of the present invention is: a chair, including a chair back, a stool and an armrest arranged on the stool, a hinge part is arranged on the chair back, and is hinged with the armrest; the hinge part includes a rotating shaft With the through hole provided on the armrest corresponding to the position of the rotating shaft, the lower end of the chair back is provided with a blocking part, and the armrest is provided with a blocking part matched with the blocking part for limiting the rotation angle of the chair back.

The back of the chair does not need to be hinged with the stool, as long as it is hinged with the armrest. Like this just do not need to set hinge parts such as bearing seat again on the stool, directly set rotating shaft on armrest, the bearing point of chair back is just at the rotating shaft position of chair back. The armrest is also equipped with blocking parts, which makes the whole structure very simple and can provide a good supporting force, and the parts can be directly connected to the armrest in one piece, so that the production is relatively simple, as long as the design of the mold can be done. The improvement of the armrest is completed, and no other parts need to be changed.

Preferably, the armrest is provided with a fixing area for fixing the armrest on the stool and a blocking area for limiting the rotation angle of the chair back. Since the main stress point of the chair is on the armrest, it is necessary to strengthen the fixation between the armrest and the stool, and set up a special fixing area.

Preferably, a tubular reinforcement is arranged in the through hole of the armrest, and tubular fins are arranged on both ends of the reinforcement in the radial direction. Since the place where the rotating shaft is connected to the handrail is the place with the greatest bearing force, it is necessary to set a reinforcement at this place, preferably a reinforcement. Because the handrail will have a through hole, the through hole is equipped with a rotating shaft, so the tubular fins at both ends of the reinforcement can strengthen the strength of the through hole surface of the handrail, preventing the through hole from being broken due to the disturbance of the rotating shaft.

As a further preference, the reinforcing member is provided with a stopper for preventing the rotating shaft from passing out of the reinforcing member.

Preferably, it also includes a fixing device and a switch device for controlling the fixing device; the fixing device is used to fix the chair back on the armrest when the chair back turns to a certain angle. In order to prevent the chair back from rotating after the user stops applying force to the chair back, a fixing device is used to fix the position of the chair back.

Preferably, the fixing device includes a latch arranged in the back of the chair, a slot arranged on the armrest corresponding to the position of the latch, a spring A sleeved on the latch, and a card for preventing the spring A from going out of the chair back; The above-mentioned latch can pass through the outside of the chair back.

As a further preference, the latch is divided into a left latch and a right latch arranged on the left and right sides of the chair back, and the switch device includes a dial fixedly connected to the right latch, a fixed shaft connected to the dial in rotation, and one end of the dial The connecting rod is fixedly connected. The connecting rod is connected to the rotating shaft through the upper rotating piece. The lower rotating piece is also arranged on the rotating shaft. Limit the position of the spring A sleeved on the left pin. Through such a transmission structure, a single dial can control the expansion and contraction of the latches on both sides of the seat back.

Preferably, the blocking part on the armrest includes a limiting device and an adjusting device; the limiting device includes a baffle plate, a compression spring connected to the baffle plate, and a fixed block fixedly connected with the compression spring; the fixed block and The armrest is fixedly connected, and the adjustment device is used to adjust the position of the baffle; the adjustment device includes a threaded rod, a pressing piece, and a knob that cooperates with the threaded rod; the threaded rod is fixedly connected with the baffle, and the pressing piece is fixed to the knob connect. By adjusting the position of the baffle to change the position of the baffle, the maximum rotation angle of the chair back can be changed. Therefore, the user can adjust the angle of the chair back according to their own comfort level. This design is more humane, and because there is a pressure spring to give the baffle a force, this force is just opposite to the force of the user on the chair back. direction. Therefore, when the user exerts too much pressure on the backrest, the fixing force of the adjustment device to the baffle is not enough, and the rebound force produced by the compression spring can also prevent the movement of the baffle.

Preferably, the blocking part on the armrest is a baffle, and a buckle is provided on the seat back corresponding to the position of the baffle, and the buckle is hinged to the fixed plate through a hinge shaft, and a spring B is connected between the fixed plate and the buckle, and the buckle Driven by the transmission rod, the transmission rod is connected to the rotating seat through the swing arm, and the driving arm is set on the rotating seat; the driving arm can be turned over to the state perpendicular to the armrest after the back of the chair is folded, so as to prevent the back of the chair from being turned into the use state . The driving arm can not only drive the movement of the buckle, but also prevent the seat back from being turned up after the seat back is folded.

Preferably, a guide track is provided between the chair back and the stool. The guide rail is divided into an inner rail connected to the back of the chair and an outer rail connected to the stool. The inner rail moves along the track of the outer rail contour, and a positioning plate is arranged inside the outer rail, and the side of the positioning plate that moves toward the inner rail Fixed connection elastic. The guide track can give the back of the chair a certain amount of support. The elastic device is to produce a buffer force to the back of the chair, reducing the force on the rotating shaft of the armrest.

The beneficial effect of the invention is that: the chair is hinged with the armrest and the blocking part is arranged on the armrest, so that the chair back can be folded and can be kept horizontal with the stool at the maximum rotation angle. In this way, there is no need to install other transmission parts such as bearing seats, which reduces the weight and cost of the chair, and because the main parts are installed on the armrest, it is easy to manufacture, easy to install, easy to maintain, and convenient to transport and reduce storage space. .

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of Embodiment 1 of the present invention;

Fig. 2 is the connection relationship diagram of chair back and armrest;

Fig. 3 is an enlarged view of part A in Fig. 2;

Figure 4 is a three-dimensional schematic diagram of the rear side of the chair;

Fig. 5 is a partial sectional view of the chair back;

Fig. 6 is a schematic diagram of the three-dimensional structure of Embodiment 2 of the present invention;

Fig. 7 is an enlarged view of part B in Fig. 6;

Fig. 8 is a schematic cross-sectional view of C-C plane in Fig. 6;

Fig. 9 is a partial schematic view of the side of the chair of embodiment 3;

Fig. 10 is a schematic diagram of embodiment 3 after the chair back is turned over;

Fig. 11 is the side schematic view of embodiment 4 chair;

FIG. 12 is an enlarged view of part D in FIG. 11 .

In the figure, 1-chair back, 11-hinge section, 12-blocking section, 13-through hole, 14-drive arm, 141-rotating seat, 142-swing arm, 143-transmission rod, 144-hinge shaft, 145- Fixed plate, 146-spring B, 2-armrest, 21-fixed area, 22-blocking area, 3-stool, 4-limiting device, 41-baffle plate, 42-pressure spring, 43-fixed block, 44- Groove, 45-Threaded Rod, 46-Pressure Sheet, 47-Knob, 48-Through Hole, 5-Fixer, 51-Clip, 52-Slot, 511-Pin, 5111-Left Pin, 5112-Right Pin , 512-card, 513-spring A, 514-slot, 6-switch device, 61-dial plate, 62-fixed shaft, 63-connecting rod, 64-upper rotating piece, 65-rotating shaft, 66-lower rotating piece , 67-block, 7-rotating shaft, 8-reinforcement, 81-block, 82-wing, 9-adjusting device, 10-guiding track, 101-inner rail, 102-outer rail, 1011-positioning plate , 1012-elasticator,

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

Embodiment 1, as shown in Figure 1-5, a kind of chair comprises chair back 1, stool 3 and the armrest 2 that is fixedly connected on the stool 3, and described chair back 1 is provided with hinged part 11, and described The armrests 2 are hinged; the hinged part 11 includes a rotating shaft 7 and a through hole 13 provided on the armrest 2 at a position corresponding to the rotating shaft 7 . The rotating shaft 7 is arranged at the middle and lower part of the chair back 1, and is fixedly connected to the chair back 1. The most preferred position of the rotating shaft 7 is lower than the position where the user exerts force on the chair back. This can prevent the user from directly exerting force on the rotating shaft 7, causing damage to the rotating shaft or the joint between the handrail and the rotating shaft. The lower end of the chair back 1 is provided with a blocking portion 12, and the blocking portion 12 may be the body of the chair back. In addition to the connection area between the armrest 2 and the chair back 1 , there are also a fixing area 21 for fixing the armrest 2 on the stool 3 and a blocking area 22 for limiting the rotation angle of the chair back 1 . Since the armrest 2 of the chair is the main force-bearing part, the armrest 2 needs a large area specially fixed with the stool 3. The fixed area in this embodiment is a strip-shaped connecting plate, and the stool 3 is passed through bolts and other fixed connections together. In the blocking area 22 on the armrest 2 is provided a blocking part 23 that cooperates with the blocking part 12 and is used to limit the rotation angle of the seat back 1 . The chair back 1 is directly hinged with the armrest 2, turning the armrest 2 into a bearing seat, which can greatly improve the utilization rate of the armrest 2, simplify the structure of the chair, reduce the cost, and achieve the purpose of turning the chair back 1, and It has good support for the user's back. The blocking part 23 in the figure is exactly a raised piece fixed on the armrest 2, which is used to block the maximum angle of the chair back rotation. This is the simplest embodiment, but the effect of this structure is also very good, and can reduce the cost.

It can be seen from Fig. 2-3 that the inner surface of the armrest 2 is welded with a reinforcing member 8 on the inner surface of the through hole 13, and the seat back 1 is inserted into the reinforcing member 8 through the rotating shaft 7. The two ends of the reinforcing member 8 are radially provided with tubular The fins 82, the fins 82 can protect the end surfaces at both ends of the through hole 13, preventing the through hole from being broken due to the disturbance of the rotating shaft. The reinforcing member 8 is integrally connected with a block 81 for preventing the rotating shaft 7 from going out of the reinforcing member 8 . The stopper 81 can be made of the same material as the reinforcing member 8 . After assembling like this, the chair back 1 is just fixed between two armrests 2, can not shake left and right.

As can be seen from Figures 4-5, the chair also includes a fixing device 5 and a switch device 6 for controlling the fixing device 5; The slot 514, the spring A513 set on the latch 511 and the card 512 used to prevent the spring A513 from going out of the seat back 1; an area inside the seat back 1 is hollow, and is specially used to place the components and switches in the fixing device 5 In the device 6 , the side of the chair back 1 has an opening, and the latch 511 can pass through the opening to go out of the chair back 1 .

The latch 511 is specifically divided into a left latch 5111 and a right latch 5112 arranged on the left and right sides of the chair back 1. The switch device 6 includes a dial 61 welded to the right latch 5112, and a fixed shaft 62 connected to the dial 61 in rotation. , the dial 61 rotates around the fixed shaft 62, and the connecting rod 63 fixedly connected to one end of the dial 61, the connecting rod 63 is connected to the rotating shaft 65 through the upper rotating piece 64, and the lower rotating piece 66 is also arranged on the rotating shaft 65, The lower rotating piece 66 is connected with the left latch 5111, and the left latch 5111 is covered with a rectangular catch 67. The blocking piece 67 is integrally connected with the seat back 1 to limit the position of the spring A513 sleeved on the left latch 5111 . The upper rotating piece 66 is located on the upper side of the rotating shaft 65, and the lower rotating piece 66 is located on the lower side of the rotating shaft 65, and the angle between the two is between 90°-270°. By moving the dial 61 left and right, it is possible to control whether the latch 511 extends out of the seat back, and as long as one dial 61 is controlled, the latches 511 on both sides can be controlled simultaneously.

Example 2, as shown in Figures 6-8, the main parts of the chair are still the chair back 1, the armrest 2 and the stool 3, mainly the blocking part 23 is another embodiment, the blocking part 23 includes a limiting device 4 and an adjusting device 9. A rectangular groove 44 is provided on the inner side of the armrest 2, and a through hole 48 is provided in the groove 44. The limiting device 4 includes a baffle 41, the width of the baffle 41 is greater than the depth of the groove 44, and it is connected to the baffle. The compression spring 42 on 41, the fixed block 43 that is fixedly connected with the compression spring 42, and the fixed block 43 is fixedly connected with the handrail 2. The adjusting device 9 includes a threaded rod 45 , a pressing piece 46 and a knob 47 threadedly connected with the threaded rod 45 ; the threaded rod 45 is fixedly connected with the baffle 41 , and the pressing piece 46 is fixedly connected with the knob 47 . Baffle plate 41, stage clip 42 and fixed block 43 in the limiting device 4 all are arranged in the groove 44, offer through hole 48 in the groove 44, and threaded rod 45 passes through hole 48 and is connected with baffle plate 41, and pressing piece 46 and knob 47 are all arranged outside the armrest. By rotating the knob 47, the pressing piece 46 on the knob 47 will gradually generate a pressure on the armrest, and the position of the baffle plate 41 is fixed by the friction force generated by this pressure. The upper side of the baffle plate 41 is also provided with a draw-in groove 52, which is matched with the buckle 51 on the chair back 1, so that the chair back 1 can be fixed on the baffle plate 41 by the cooperation of the buckle 51 and the draw-in groove 52. Even if the user leaves the chair back 1 and does not apply force to the chair back 1, the chair back 1 will not rotate. In this way, the user can manually adjust the rotation angle of the chair back 1 . When the chair does not need to be used or transported, the knob 47 can be loosened, the buckle 51 and the slot 52 can be loosened, and then the chair back 1 can be turned down so that it can be stored close to the stool 3 at most.

Embodiment 3, as shown in FIGS. 9-10 , the chair is provided with a buckle 51 on the back of the chair, which is used to engage with the blocking part 23 on the armrest 2 , that is, the baffle 41 . Buckle 51 has hinged fixed plate 145 by hinge shaft 144, and spring B146 is connected between fixed plate 145 and buckle 51, and fixed plate 145 is fixedly connected in chair back 1 inside, and can only see buckle 51 from outside the chair. Buckle 51 is driven by transmission rod 143, and transmission rod 143 is connected to rotating base 141 through swing arm 142, and driving arm 14 is arranged on rotating base 141; Rotating base 141 here can be a universal joint. The drive arm 14 swings left and right, driving the rotation of the inner shaft of the rotating seat 141, thereby driving the rotation of the swing arm 141, and the swing arm 141 can drive the buckle 141 to rotate around the hinge shaft 144 within a certain range. The spring B146 can make the buckle 141 reset automatically.

After the chair back 1 is folded, the driving arm 14 can be turned over to a state perpendicular to the armrest 2, and the driving arm 14 will intersect with the armrest 2 to prevent the seat back 1 from being turned over to the use state.

Embodiment 4, as can be seen from FIGS. 11-12 , a guide track 10 is provided between the chair back 1 and the stool 3 . The guide rail 10 is divided into an inner rail 101 hinged with the chair back 1 and an outer rail 102 fixedly connected with the stool 3, the inner rail 101 and the outer rail 102 are arc-shaped, the inner rail 101 moves in the outer rail 102, and the outer rail 102 A positioning plate 1011 is welded inside 102, and the side moving toward the inner rail 101 on the positioning plate 1011 is fixedly connected with an elastic device 1012. The elastic device 1012 described here can be a spring, and one end of the spring is fixedly connected with the positioning plate 1011. One end is also fixedly connected with a movable plate, and the movable plate is in contact with the inner rail 101 . When the chair back 1 was rotated to the angle of use, the inner rail 101 was just in contact with the movable plate or had produced some pressure on the spring, and the elastic device 1012 produced a buffer force to the chair back 1, so that the user would feel that the chair back 1 was like a In the rocking chair, the chair back 1 can swing along with the user's exertion.

Claims (10)

1. chair, comprise the chair back (1), bench (3) and be arranged on handrail (2) on the bench (3), it is characterized in that: articulated section (11) is set on the described chair back (1), be hinged with described handrail (2), described articulated section (11) comprise the through hole (13) that turning cylinder (7) and upper corresponding turning cylinder (7) position of described handrail (2) arrange; The lower end of the described chair back (1) arranges stop part (12), the upper stop member (23) that is used for the restriction chair back (1) rotational angle that matches with stop part (12) that arranges of described handrail (2).

2. by a kind of chair claimed in claim 1, it is characterized in that: described handrail (2) is upper arrange in order to handrail (2) is fixed on the bench (3) fixed area (21) and in order to limit the Resistance (22) of the chair back (1) rotational angle.

3. by a kind of chair claimed in claim 2, it is characterized in that: the reinforcement (8) of tubulose is set in the through hole (13) of described handrail (2), and the footpath at the two ends of described reinforcement (8) upwards arranges tubulose fin (82).

4. by a kind of chair claimed in claim 3, it is characterized in that: be provided on the described reinforcement (8) preventing that turning cylinder (7) from passing the outer block (81) of reinforcement (8).

5. by a kind of chair claimed in claim 1, it is characterized in that: the switching device (6) that also comprises fixture (5) and control fixture (5); Described fixture (5) is used for the chair back (1) when turning to certain angle, and the chair back (1) is fixed on the handrail (2).

6. by a kind of chair claimed in claim 5, it is characterized in that: described fixture (5) comprises the latch (511), the groove (514) that is arranged on upper corresponding described latch (511) position of handrail (2) that are arranged in the chair back (1), is enclosed within the spring A(513 on the latch (511)) and be used for preventing spring A(513) pass the outer card (512) of the chair back (1); Described latch (511) can pass outside the chair back (1).

7. by a kind of chair claimed in claim 6, it is characterized in that: described latch (511) is divided into left latch (5111) and the right pin (5112) that is arranged on the chair back (1) left and right sides, described switching device (6) comprises the plate (61) that is fixedly connected with right pin (5112), the fixed axis (62) that is rotationally connected with plate (61), the connecting rod (63) that is fixedly connected with plate (61) one ends, described connecting rod (63) is connected on the rotating shaft (65) by upper rotatable lamella (64), lower rotatable lamella (66) also is set on the rotating shaft (65), lower rotatable lamella (66) is connected with left latch (5111), left latch (5111) cover has catch (67), and described catch (67) is enclosed within spring A(513 on the left latch (5111) in order to restriction) the position.

8. by a kind of chair claimed in claim 1, it is characterized in that: the stop member (23) on the described handrail (2) comprises stopping means (4) and adjusting device (9); Described stopping means (4) comprises baffle plate (41), is connected to the stage clip (42) on the baffle plate (41), the fixed block (43) that is fixedly connected with stage clip (42); Described fixed block (43) is fixedly connected with handrail (2), and described adjusting device (9) is used for the position of controllable register (41); Described adjusting device (9) comprises threaded rod (45), compressing tablet (46) and the knob (47) that is connected with threaded rod (45); Described threaded rod (45) is fixedly connected with baffle plate (41), and compressing tablet (46) is fixedly connected with knob (47).

9. by a kind of chair claimed in claim 1, it is characterized in that: the stop member (23) on the described handrail (2) is baffle plate (41), upper corresponding baffle plate (41) position of the described chair back (1) arranges buckle (51), buckle (51) is by the hinged fixed head of jointed shaft (144) (145), linking springs B(146 between fixed head (145) and the buckle (51)), buckle (51) is driven by drive link (143), drive link (143) arranges actuating arm (14) by swing arm (142) connection of rotating seat (141) on the rotation seat (141); Described actuating arm (14) can be turned to the state with handrail (2) vertical interlaced after the chair back (1) is folding, get back to the use state in order to stop that the chair back (1) overturns again.

10. by claim 5 or 8 or 9 described a kind of chairs, it is characterized in that: between the described chair back (1) and the bench (3) guide rail (10) is set, described guide rail (10) is divided into the interior rail (101) that is connected with the chair back (1) and the outer rail (102) that is connected with bench (3), interior rail (101) is along the orbiting motion of outer rail (102) profile, outer rail (102) inside arranges location-plate (1011), and a side of rail (101) motion inwardly is fixedly connected with Billiard apparatus (1012) on the location-plate (1011).

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