CN201123561Y - chair structure - Google Patents

Abstract

The utility model relates to a chair structure, belonging to furniture. It comprises a support leg; a base supporting the legs; a back support mounted on the back; a seat support mounted on the seat; a first swing central shaft which inclines backwards and is connected with the chair back support body is arranged on the base; a second swing central shaft located at the same height or above the front of the first swing central shaft, the seat support body being connected to the base in a swing manner; a third rocking center shaft which is located between the first and second rocking center shafts and is connected to the upper side of the first and second rocking center shafts, wherein the back support body is vertically rocking-connected to the seat support body, and is linked to the back support body to be tilted backward and lifted up, and the third rocking center shaft is connected to the second rocking center shaft. Has the advantages that: simple structure, convenient to use, it is with low costs, the chair is sat up more comfortablely, and the practicality is strong.

Description

chair structure

technical field

The utility model relates to furniture, in particular to a chair structure, in particular to a chair structure in which the chair seat rises in conjunction with the backward inclination of the chair back.

Background technique

As we all know, for chairs with a synchronous rocking structure that is linked to the rocking of the seat back and moves the seat, chairs that are linked to the reclining of the seat back and sink the seat are becoming more and more popular. , but on the contrary, there are also chairs that move with the back of the chair and make the seat rise;

For the chair of the type that is linked with the reclining of the back of the chair and the seat is raised, as shown in Figure 37, this chair has the following structure: includes a leg 101, a base supported by the leg 101 102, the chair back pole 104 installed on the chair back 103, the seat support body 106 installed on the seat seat 105 and the connecting shaft 107 that can make the chair back pole 104 tilt backward on the base 102, the base 102, link the chain link 108 of the seat support body 106, the extension part 112 of the seat back pole 104, and the connecting shaft 109 that is connected with the seat support body 106; 109 is rising; in addition, through the rising of the shaft 109, the chain lever 108 that falls forward can be raised; the above structure is linked with the backward tilt of the seat back 103, and the seat 105 becomes rising; In this chair, the force that makes the seat 105 sink becomes the force that makes the seat back 103 stand up. Therefore, the weight of the occupant sitting on the seat 105 produces resistance to the reclining of the seat back 103; Therefore, if a person with a heavier body weight wants to make the seat back 103 tilt backward, a greater force is required, so that the reaction force of the force of the chair back 103 tilting backward obtains a corresponding power according to the weight of the occupant;

But above-mentioned chair structure still has following problem when using:

When the seat 105 is raised, the chain lever 108 is rotated at the center by the shaft 110 on the lower side, and from the state of falling forward, it becomes the state of standing up; At the stage when the seat back starts to tilt backward, the seat 105 becomes the state where it can be lifted up to the maximum. When the occupant tilts the seat back 103 backward, the reaction force that occurs at this initial stage becomes the largest. After that, the reaction force becomes the largest. Power is reduced again; This type of chair needs greater power when the chair back 103 begins to topple over, and the occupant also must firmly lean on the chair back 103; yet, if the chair back 103 falls to a certain degree, The reaction force will be weakened suddenly, thereby making the chair back 103 easy to topple over suddenly, therefore, the setting of its reaction force may not be said to be appropriate; The chain rod 108 between the upper part and the base 102, so the number of parts also becomes more. In other words, the chain rod 108 becomes a necessary accessory, and also needs to be arranged on the shafts 110, 111 up and down the chain rod 108, so As a result, the number of parts increases, the manufacturing cost increases, and the structure becomes complicated, which needs to be improved.

Utility model content

The purpose of the utility model is to provide a chair structure, which solves the problems of complex structure, high cost, inappropriate setting of reaction force and poor comfort of commonly used chairs.

The technical solution of the utility model is: including the legs; the base supporting the legs; the back support body installed on the back of the chair; the seat support body installed on the seat; The first rocking central axis of the chair back support; located at the same height or above the front of the first rocking central axis, the second rocking central axis of the seat support rockingly connected to the base; positioned at the first and second rocking centers Between the shafts, at the position above the connection line connecting the first and second rocking central axes, the back support body and the seat support body are swingingly connected in the up and down direction, and the second movement of the seat back support body moves backward and rises. Three oscillating central shafts, the third oscillating central shaft is connected to the second oscillating central shaft; and a sliding structure that guides the second oscillating central shaft backward and obliquely upward; wherein, the sliding structure is in a straight line or is located on the lower side and is convex. arc-shaped way to guide the second rocking central axis; the base has a locking structure for fixing the back support body; In the operation structure of the locking lever, when the swing of the oscillating body connected to the lock lever is restricted, when the operation structure is operated, it will elastically deform and absorb the displacement of the oscillating body, and at the same time accumulate force, it can make the oscillating body move. The elastic deformation part of the force that shakes and shakes the rocking body.

The utility model has the advantages that: when the chair back is tilted backward, the chair seat can be prevented from rising greatly and then rising slightly in the stage of inclination; therefore, the chair back can be prevented from toppling to a certain extent Afterwards, because the reaction force weakens quickly and it is easy to fall over, the comfort of the chair can be improved; in addition, through the relationship between the sliding structure and the structure that guides the third shaking central axis, the structure of the chair can be simplified and the chair can be lowered. Manufacturing cost; when the back of the seat is tilted backward, the rise of the seat is uniform, or the rise of the seat is gradually increased; therefore, when the occupant leans on the back of the seat, the back of the seat is tilted backward It can maintain a certain reaction force, or maintain a moderate reaction force due to the angle of the chair back, so that the chair is more comfortable to sit on; the base has a locking structure for fixing the seat back support, so it can be The back of the chair is fixed at the initial position, and the chair can be used more freely; it is easy to use, low in cost, and strong in practicability.

Description of drawings:

Fig. 1 is the side view schematic diagram of the chair back of the present utility model not tilted backward;

Fig. 2 is a schematic side view of the chair back of the present invention in a backward tilted state;

Fig. 3 is a schematic cross-sectional view of the chair back support body of the present invention not tilted backward;

Fig. 4 is a schematic cross-sectional view of the back support body of the utility model leaning backward;

Fig. 5 is a schematic plan view of the seat back support body assembled on the base of the utility model;

Fig. 6 is a V-V sectional schematic diagram of Fig. 4;

Fig. 7 is an enlarged cross-sectional schematic diagram of the installation part of the operating rod of the present invention;

Fig. 8 is a schematic side view of another embodiment of the utility model;

Fig. 9 is a schematic cross-sectional view of an unfixed chair back support body of the present invention;

Fig. 10 is a schematic cross-sectional view of a fixed chair back support body of the present invention;

Figure 11 is a schematic plan view of the locking structure of the present utility model;

Fig. 12 is a schematic diagram of the unfixed chair back support body of the rotating body with the locking structure of the utility model;

Fig. 13 is a schematic diagram of the fixed seat back support body of the rotating body with the locking structure of the utility model;

Fig. 14 is a schematic diagram of the installation of the swing bar with the locking structure on the base of the utility model;

Fig. 15 is a schematic diagram of the seat mounting parts of the present invention being fixed on the seat support body;

Figure 16 is a schematic diagram of the utility model armrest installation parts fixed on the seat support body;

Figure 17 is a schematic side view of the utility model except for the sliding structure;

Figure 18 is a schematic side view of the utility model except the reaction force mechanism;

Figure 19 is the utility model reaction force mechanism

Fig. 20 is a schematic diagram of an embodiment of the bottom surface of the seat of the utility model;

Fig. 21 is a schematic cross-sectional view of A-A of Fig. 20;

Figure 22 is a schematic cross-sectional view of B-B in Figure 20;

Fig. 23 is a schematic diagram of another embodiment of the bottom surface of the seat of the utility model;

Fig. 24 is a schematic cross-sectional view of A-A of Fig. 23;

Fig. 25 is a schematic diagram of another embodiment of the bottom surface of the seat of the utility model;

Fig. 26 is a schematic side view of the installation structure shown in Fig. 25;

Fig. 27 is a schematic front view of the installation structure shown in Fig. 25;

Fig. 28 is a schematic diagram of yet another embodiment of the bottom surface of the seat of the utility model;

Fig. 29 is a schematic cross-sectional view of A-A of Fig. 28;

Fig. 30 is an implementation sectional view of the operating rod of the height adjustment structure of the present utility model;

Fig. 31 is a schematic cross-sectional view of an unfixed seat back support in the locking structure of the utility model;

Fig. 32 is a schematic cross-sectional view of the locking structure shown in Fig. 31 and the fixed seat back support body;

Fig. 33 is a schematic plan view of the locking structure shown in Fig. 32;

Figure 34 is a schematic cross-sectional view of X-X in Figure 33;

Fig. 35 is a Y-Y sectional schematic diagram of Fig. 34;

Fig. 36 is a Z-Z sectional schematic diagram of Fig. 34;

Fig. 37 is a schematic side view of a conventional chair with the back of the chair not tilted backward.

Detailed ways:

As shown in accompanying drawing 1 to accompanying drawing 7, the chair of the utility model comprises leg 1; The base 2 of supporting leg 1; The back supporting body 4 that is installed on the chair back 3; The seat supporting body that is installed on the seat 5 6. Connected to the base 2, the first rocking central axis 7 that enables the seat back support body 4 to tilt backward; connected to the base 2, the second rocking central axis 8 that enables the seat support body 6 to swing upward and downward ; link the back support body 4 and the seat support body 6, so that it can shake in the up and down direction, and the third rocking central axis 9 that is linked with the backward tilt of the chair back support body 4 and rises; and the third shaking central shaft 9 The rising linkage of the second rocking center shaft 8 guides the sliding structure 10 obliquely upwards backward;

The base 2 is embedded on the top of the leg 1; the bottom plate 2a of the base 2 is provided with a cylindrical portion 2b that gradually shrinks in diameter upwards; the leg 1 is provided with an air spring 18 for height adjustment, and the air spring 18 The top protrudes from the upper end of the leg 1; the upper peripheral surface of the gas spring 18 presents an inclined surface that gradually shrinks in diameter from bottom to top; therefore, by inserting the top of the gas spring 18 into the cylindrical portion 2b from below, The base 2 is installed on the top of the foot 1; the rear half of the left and right side plates 2c, 2d of the base 2 are provided with a perforation that passes through the first rocking central axis 7, and on the front half, a second rocking shaft is provided. The perforation of the central shaft 8; in the present embodiment, the perforation of the second rocking central shaft 8 is regarded as a long hole as a sliding structure 10; in addition, this long hole is expressed as a sliding structure 10 below;

The seat support body 6 supports the seat seat 5, so it can be freely rocked and slidably installed on the base 2; A pair of left and right side plates 6b, 6c hanging down from both side edges are formed, and these parts are formed by bending a sheet; taking the seat 5 as an example, the seat 5 is installed on the upper plate 6a by screws, and the left and right side plates 6b, 6c are configured on the outside of the side plates 2c, 2d of the base 2; the central parts of the left and right side plates 6b, 6c of the seat support body 6 are provided with perforations passing through the third rocking central axis 9, and on the front half Then be provided with the perforation that passes through the second rocking central axis 8;

The effect of the back support body 4 is to support the chair back 3, so it can be installed on the base 2 freely; A pair of left and right side plates 4a, 4b disposed between the side plates 6b, 6c of 6, and a support plate 4c disposed between the left and right side plates 4a, 4b; the front half and the rear half of the support plate 4c form The gap between height and height, wherein the front half is high and the rear half is low; the rear half of the support plate 4c carries the load 4d arranged on the rear half of the left and right side plates 4a, 4b, and is fixed by welding or the like; In this way, it is integrated with the left and right side plates 4a, 4b, and the support plate 4c; the mounting plate 11 fixed on the seat back 3 is fixed on the support plate 4c by means of welding or the like. On the rear half of the back support body 4, the front half of the support plate 4c extends to a position higher than the rear half, and is arranged above the base 2. The perforation through the first rocking central axis 7, while the first half is provided with the perforation through the third rocking central axis 9;

The first rocking central axis 7 passes through the perforation provided on the base 2 and the perforation at the seat back support body 4, the chair back support body 4 is connected to the base 2, and can be tilted backward; the first rocking central axis 7 The front end of the front end is embedded with a pull-out device 12; the second rocking central axis 8 passes through the sliding structure 10 provided on the base 2, and the perforation in the seat support body 6, and connects the base 2 so that the seat support body 6 may shake in the up and down direction; the front end of the second rocking central shaft 8 is embedded with a pull-out device 12; the third rocking central shaft 6 passes through the perforation provided on the seat support body 6, and is located on the seat back support body 4, connect the seat support body 6 and the chair back support body 4, and make it shakeable; the front end of the third shaking central axis 9 is embedded with the pull-out device 12;

The push button 13 made of polyacetal is embedded in the periphery of the sliding structure 10, so that the sliding of the second rocking central axis 8 is in a smooth state; the angle of the sliding structure 10 is preferably obliquely upward and rearward, for example, about 40 degrees to 70 degrees Inclination, wherein it is best to incline at about 55 degrees incline upwards and backwards in the past; moreover, the length of the sliding structure 10 is 25 mm if it is inclined at 55 degrees inclines upwards and backwards in the past. Taking the second shaking central axis 8 as an example, The rise is about 20mm;

The second rocking center shaft 8 is arranged in front of the first rocking center shaft 7 at a higher position than the first rocking center shaft 7; the second rocking center shaft 8 is guided along with the displacement of the third rocking center shaft 9 1. Displacement to the sliding structure 10; the range of its displacement is ahead of the first shaking central axis 7 and above the first shaking central axis 7; but if the second shaking central axis 8 is arranged on the first shaking central axis 7 and the position is at the same height as the first rocking central shaft 7, and from this position, it can be guided to the sliding structure 10 and moved obliquely upwards backward; in addition, even in this state, the second rocking central shaft 8 The position in front of the first rocking central axis 7 is displaced; moreover, the third rocking central axis 9 is arranged between the first and second rocking central axes 7 and 8, and is positioned at a position higher than that connecting the first and second rocking central axes 7. , 8 above the connecting line L; the third rocking central axis 9 is displaced with the reclining of the seat back support body 4, and the range of displacement is between the first and second rocking central axes 7 and 8, and is larger than the first , The connecting line L formed by the second shaking central axis 7, 8 is at the upper position;

In addition, when the second rocking central axis 8 is in the range below the first rocking central axis 7, there will be no displacement. Therefore, the second rocking central axis 8 can be moved along with the reclining of the seat back support 4. to rise smoothly;

Between the base 2 and the back support body 4, a reaction force structure 14 is provided. The reaction force structure 14 can press the seat back when the seat back support body 4 tilts backward by giving the seat back support body 4 an upper force. The support body 4 is restored to its original state and returned to its original position; taking the accompanying drawings 3 and 4 as examples, it is composed of a coil spring 15 and a spring plate 16 arranged at both ends of the coil spring 15, and the spring plate 16 on the upper side , fold the surrounding surface of the shaft center 17 embedded in the spring plate 16 on the lower side, and follow the expansion and contraction of the coil spring 15, so that the distance between it and the spring plate 16 on the lower side is changed; There is a concave portion 16a, and the upper spring plate 16 is provided with a convex portion 16b; the reaction force structure 14 embeds the concave portion 16a in the convex portion 2g of the base 2, and inserts the convex portion 16b into the seat back support 4. The concave portion 4g of the seat back support body 4 is arranged between the base 2 and the seat back support body 4; the reaction force structure 14 is arranged behind the first rocking central axis 7, and once the seat back support body 4 tilts backward, the coil is compressed. Spring 15, and reaction force takes place;

The gas spring 18 for height adjustment is operated by a height adjustment structure 19; the height adjustment structure 19 is composed of, for example, an operating rod 20 and an installation tool 21 installed on the base 2 in a rocking manner; the operating rod 20 The composition includes the joystick bent into a crank shape, that is, the extension part 20a extending from the width direction of the chair and installing the operation panel 22, the shaft support part 20b extending backward from the extension part 20a, and the shaft support part The front end of 20b extends to the operation part 20c of the width direction of the chair; the shaft support part 20b and the operation part 20c are accommodated in the base 2, and are extended from the long perforation 2h provided on the right side plate 2c of the base 2. The out portion 20a protrudes from the outside of the base 2; the shaft support portion 20b is supported by the two ribs 2i arranged on the base 2, and the installation device 21 of the rib 2j provided between the ribs 2i. In other words, the recesses of the two rib arches 2i and the recesses of the installation tool 21 clamp the shaft support part 20b from top to bottom, and constitute the bearing part; the operation part 20c is inserted into the convex part of the gas spring 18 18a, to form an operable state; the long perforation 2h of the base 2 forms a shakeable shape of the operating rod 20; the operating rod 20 makes the extension part 20a downward by its own weight, and lifts the operating part 20c;

Once the occupant leans against the back of the seat 3, he compresses the coil spring 15 of the reaction force structure 14, and at the same time makes the seat back 3 and the seat back supporting body 4 tilt backward with the first rocking central axis 7 as the center; The three rocking central shafts 9 go up; moreover, in conjunction with the rise of the third rocking central shaft 9, the second rocking central shaft 8 is guided to the sliding structure 10 and moves obliquely upwards backward; in other words, because the second rocking As the central axis 8 and the third rocking central axis 9 rise, the seat support body 6 and the seat 5 also rise; , becomes the reaction force;

In this embodiment, the sliding structure 10 guides the second rocking central axis 8 linearly to the rear obliquely upward; the third rocking central axis 9 will be displaced to the upper rear side on the circumference centered on the first rocking central axis 7, so that The relationship between the increasing part of the reclining angle of the seat back 3 and the rising distance of the second rocking central axis 8 is constant. The rate of rise of the central axis 8 is uniform; in other words, the positional relationship between the first, second, and third rocking central axes 7, 8, and 9, and the inclination angle of the sliding structure 10, when the seat back support 4 is tilted backward , the rate of rise of the second rocking central axis 8 becomes uniform; therefore, when the seat back 3 is tilted backward by the occupant, the reaction force will not change greatly in the middle, and the seat back can be moved with almost the same force. 3 Continue to fall backwards to improve the comfort of the chair;

In this embodiment, the positional relationship of the first, second, and third rocking central axes 7, 8, and 9 is taken as an example with the inclination angle of the sliding structure 10. When the seat back support body 4 is tilted backward, the second rocking central axis The rising rate of 8 becomes uniform; in other words, when the chair back support body 4 is not tilted backward, viewed from the side of the chair, it is about 40 degrees in front of the first rocking central axis 7 obliquely , configure the third rocking central axis 9, and configure the second central axis 8 at a position about 7 degrees obliquely forward; moreover, viewed from the side of the chair, it is about On the position of 10 degrees, configure the third rocking central axis 9; moreover, from the side of the chair, the sliding structure 10 is tilted upward and backward about 55 degrees; from this state, once the chair back support 4 moves backward Tilting, the third rocking central axis 9 is displaced to within about 60 degrees of the obliquely upward front of the first rocking central axis 7, and the second rocking central axis 8 is displaced to about 15 degrees obliquely upward and forward of the first rocking central axis 7. Location;

On the other hand, once the occupant stops leaning against the seat back 3 and gets up, the coil spring 15 of the reaction force structure 14 is extended, so that the seat back support 4 stands forward;

The chair is constructed by guiding the third rocking central axis 9 through the sliding structure 10, which can simplify the composition of the chair and further control the cost increase;

When adjusting the height of the seat 5, when the operating lever 20 is not operated due to the relationship of the occupant, the operating lever 20 will lower the extension part 20a and raise the operating part 20c due to its own weight; therefore, the convex part of the gas spring 18 will 18a is not operated, and its length cannot be changed, the length of the leg 1 is kept constant, and the height of the seat 5 is also kept constant;

Once the occupant lifts the operating plate 22 of the operating lever 20, the operating lever 20 is shaken around the shaft support 20b, and the operating part 20c is pressed down to press into the convex portion 18a of the air spring 18; therefore, the length of the air spring 18 is adjusted. That is possible, but the length of leg 1 can be changed, the height of seat 5 is adjusted, and then after the occupant's hand releases operating lever 20, operating lever 20 promptly gets back to the unoperated state due to its own weight.

As shown in accompanying drawing 8 to accompanying drawing 16, it is another embodiment of the present utility model, and chair has the locking structure 23 of fixing back support body 4 on base 2, and locking structure 23 is equipped with fixing back support body 4, the rocking body 45, and the chain lever 46 that rocks the rocking body 45, and the operation structure that makes the displacement of the chain rod 46; A rod is also available; an operating panel 47 for operating the rotating body 44 is provided;

The rotator 44 is disposed between the side plate 2d and the wall plate 2n on the left side of the base 2, embedded in the axis 48, and cannot rotate relatively; The spring 49 pressed by the wall plate 2n; the axis 48 is supported on the side plate 2d of the base 2 in a freely rotatable manner, protruding from the left side plate 2d, and the operating panel 47 is installed on this protruding part;

The rotating body 44 is provided with an arm bar 44a and a stopper 44b, so that the rotating body 44 turns from the initial position toward the locked position. In this way, the rotating body 44 allows the arm bar 44a to move toward the inclined surface 51 of the wall plate 2n. , while turning; at this time, the inclined surface 51 protrudes toward the side plate 2d side from the part contacted by the arm bar 44a at the initial position, and the part contacted by the arm bar 44a at the locked position, so that the spring is compressed while pressing the rotating body 44. 49, while moving toward the side plate 2d side; the arm bar 44a is connected with the rockable chain lever 46, once the rotary body 44 returns to the initial position from the locked position, the brake 44b is fine-tuned to the side plate 2d to prevent the rotary body 44 from turning over;

The swing body 45 includes left and right side plates 45a, 45b, and a connecting plate 45c connecting the two. The left and right side plates 45a, 45b are provided with a shaft portion 45d, and the shaft portion 45d is inserted into the concave portion 2p provided on the base 2. The cover plate 52 is covered on the upper part, and the cover plate 52 is fixed on the base 2 by screws 53. The oscillating body 45 is centered on the shaft portion 45d and is installed on the pedestal 2 in a shakeable manner. The upper end of the oscillating body 45, Therefore, when the rocking body 45 rocks in the rear, the upper end of the rocking body 45 rises and fits into the recess 4h of the seat back support body 4. In this state, the upper end of the rocking body 45 Enter the range where the chair back support body 4 is tilted backward;

As shown in accompanying drawing 9, when the rotating body 44 returns to the initial position, the chain lever 46 pulls the rocking body 45 forward, and the upper ends of the side plates 45a, 45b move out from the recess 4h of the seat back support body 4. In other words, because the side plates 45a, 45b are moved out of the reclining range of the chair back support 4, the chair back support 4 can be tilted backward; in other words, the chair back 3 will not be locked;

On the other hand, as shown in accompanying drawing 10, once the rotating body 44 turns back to the locked position, the chain lever 46 promptly makes the rocking body 45 swing backward, therefore, the upper ends of the side plates 45a, 45b are embedded in the seat back support body 4. In the recess 4h; in other words, the side plates 45a, 45b enter the reclining range of the seat back support 4, so that the reclining of the seat back support 4 is prohibited; in other words, the seat back 3 is locked;

In addition, in this embodiment, the support plate 4c of the seat back support body 4 is divided into a front half 4ca and a rear half 4cb. 4b is integrally formed; in other words, the rear half 4cb and the side plates 4a, 4b are formed by bending a sheet; the front half 4ca takes the left and right side plates 4a, 4b as an example, and is fixed as a whole by means of welding or the like.

As shown in accompanying drawing 7 and accompanying drawing 30, the shaft support portion 20b of the operating rod 20 of the height adjustment structure 19 is dropped into the depressions of the two rib arches 2i, and the position between the rib arches 2i is set with a planar shape. The installation device 21 is clipped in from above, and supports the joystick 20 in a rotatable manner;

On the seat support body 6, take the seat mounting part 37 as an example, fix by means such as welding; take the seat mounting part 37 as an example, be located at two places before and after the seat, and seat the thin shell 38 with the seat mounting part 37 is fixed, for example, seat base 5 is installed on the seat support body 6 with screws; moreover, on the top of seat support body 6, there are armrest mounting accessories 39 for installing armrest usefulness, such as fixing with methods such as welding; In addition, Even if handrail installation accessories 39 are arranged, handrails may not be installed;

As shown in Figure 17, the sliding structure 10 can be guided non-linearly and guided to the lower side in a convex arc shape; in other words, the sliding structure 10 of the base 2 can also be shaped as a convex arc on the lower side shape; in this case, the rising rate of the second rocking central axis 8 gradually increases with the reclining of the seat back 3; There will be a feeling of peace of mind, and the comfort level during the ride will be improved; at this time, the positional relationship of the first, second, and third shaking central shafts 7, 8, and 9 and the shape and curvature of the sliding structure 10 will make the seat back support body 4 When tilting backward, as long as the rising rate of the second rocking central axis 8 can gradually increase, there is no special limit;

As shown in accompanying drawing 18 and accompanying drawing 19, in the above description, if the reaction force structure 14 cannot adjust the strength of the reaction force that takes place, but as long as it can be adjusted; , by changing the protruding amount of the front end of the adjusting screw 40, adjusting the preload of the coil spring 15 of the reaction force structure 14, and adjusting the strength of the reaction force that occurs, this method is also possible; in this case, on the top of the handle 41, set There is an adjusting screw 40, through the rotary operation of the handle 41, the protrusion of the adjusting screw 40 can be adjusted steplessly, that is, the strength of the reaction force can be adjusted; or, at the base end of the joystick 42, an adjusting screw 40 is provided. , through the shaking operation of the joystick 42, adjust the protrusion amount of the adjustment screw 40, that is, the strength of the reaction force, in a three-stage manner, for example; in addition, on the bottom plate 2a of the base 2, weld The bottom plate 43 with the screw hole 43a is fixed; the adjusting screw 40 is embedded in the screw hole 43a, protruding from the hole 2m of the bottom plate 2a to the spring plate 16 on the lower side of the reaction force structure 14;

As shown in accompanying drawing 31 to accompanying drawing 36, locking structure 23 also can adopt the type that is provided with spring part in the mechanism, and can keep self-function; When the structure 44 is operated, it is elastically deformed to absorb and accumulate the force that makes the oscillating body 45 oscillate and displace. At the same time, once the oscillating body 45 is shaken, it is also possible to design an elastically deformable portion that exerts the oscillating force of the oscillating body 45, that is, the spring portion 56 In the present embodiment, the form of setting is that the middle of the chain rod 46 is bent into a U-shape, and the elastic deformation portion 56 is provided; but the shape of the elastic deformation portion 56 can absorb the displacement and the accumulation force of the rocking body 45 as long as it can be absorbed. And make the accumulated oscillating body 45 exert its oscillating power;

In this embodiment, the rotating body 44 of the operating structure is disposed between the left side plate 2d and the wall plate 2n of the base 2, embedded in the axis 48, so that it cannot rotate; The convex portion 48a of 48 is inserted into the concave portion 44d of the perforation 44c of the rotary body 44, and the rotary body 44 is embedded in the shaft center 48 in a relatively non-rotatable manner; between the rotary body 44 and the bottom plate 2a of the base 2, there is The fixed member 57 is molded with elastic resin and the like, and the convex part 57d between the concave parts 57a and 57b can be pressed down by setting the perforation 57c; The convex part 44e of the fixed member 57 is fitted into the concave part 57a or concave part 57b, in this way, the rotary body 44 is fixed at the initial position or at the locked position; by pressing the convex part 57d, the rotary body can be turned The convex part 44e of the body 44 moves between the concave parts 57a, 57b, therefore, the rotary body 44 may rotate between the initial position and the locked position; the fixing member 57 is embedded in the concave part 2t of the base plate 2a ;

The arm bar 44a is arranged on the top of the rotating body 44, and the chain link 46 is connected near the front end of the arm bar 44a in a rockable manner; 45b;

The axis 48 is inserted into the perforation 58 provided on the side plate 2d of the base 2 and the perforation 61 provided on the wall plate 2n, and the wall plate 2w and the operating rod 20 are supported in a freely rotatable manner by swinging the installation tool 21 This inboard end; The top of axle center 48 is provided with convex portion 48b, and convex portion 48b is inserted into the concave portion 58a of the perforation 58 of side plate 2d, thereby makes the rotation angle of shaft center 48, convex portion 48b from one side of concave portion 58a The range to the other side is the range where the rotating body 44 is restricted from rotating from the initial position to the locked position; the base 2 is made of metal, for example, and the force that exceeds the rotating range to make it barely rotate is input to the shaft Center 48, perforation 58 or recess 58a still can not expand, and can limit the angle of rotation of axle center 48, not only can prevent the revolution excessive of rotating body 44 or prevent shaking body 45 from shaking excessively, and can prevent the installation of the inner side end of axle center 48 part etc. cause load;

As shown in accompanying drawing 36, the inner end of the axis 48 is loaded on the top of the section 59 of the wall plate 2w; near the inner end of the axis 48, a groove 48c is formed, and on this groove 48c, the mounting device 21 The fixed piece 21a is inserted from above, and in this way, the inner side of the shaft center 48 is supported by the wall plate 2w and the installation tool 21 in a manner that can be rotated; moreover, by inserting the fixed piece 21a into the groove 48c, and It can prevent the axis 48 from being pulled out; the operating rod 20 can be installed in a rocking manner, and the installation device 21 supports the axis 48, which can not only reduce the number of parts, but also reduce the assembly process, thereby reducing the manufacturing cost;

The operating handle 60 is fixed on the outer end of the shaft center 48, and the operating handle 60 is held to make it rotate, so that the operating rotary body 44 can be rotated; It is also possible to operate the rotary body 44 with a lever;

On the top of the chair back support body 4 of this embodiment, a convex portion 4i is provided. When the chair back support body 4 is not tilted backward, the convex portion 4i is located outside the rocking range. Once the chair back support body 4 Tilt backward, and the rocking body 45 enters the rocking range;

As shown in accompanying drawing 31, when the rotating body 44 returns to the state of the initial position, the chain lever 46 guides the rocking body 45 back to the front, and the upper ends of the side plates 45a, 45b are separated from the recess 4h of the seat back support body 4, Therefore, the seat back support body 4 can be tilted backward, in other words, the seat back 3 is in an unlocked state;

As shown in Figure 32, on the other hand, once the rotating body 44 is turned to the locked position, the chain lever 46 will cause the rocking body 45 to rock backward. Therefore, the upper ends of the side plates 45a, 45b are embedded in the recess 4h of the seat back support body 4. Among them, in this state, when the chair back support body 4 is wanted to tilt backward, the chair back support body 4 promptly touches the rocking body 45, and the chair back support body 4 is prohibited from tilting backward. is locked;

When the revolving body 44 is in the initial position, the rocking body 45 is pulled back to the front, and when the chair back supporting body 4 is tilted backward, the convex portion 4i of the chair back supporting body 4 enters the rocking range of the rocking body 45; In this state, control the operation handle 60 to make the rocking body 45 shake backwards, and the rocking body 45 will touch the convex part 4i, and then the rocking body 45 will not be able to rock backward; in this state, further control the operating handle The handle 60 makes the rotating body 44 turn further, and the elastic deformation part 56 of the chain lever 46 is elastically deformed, absorbing the displacement and accumulating operating force intended to make the rocking body 45 rock. Once the supporting body 4 is erected, the convex portion 4i will break away from the swinging range of the swinging body 45, which may cause the swinging body 45 to swing backward, and the originally elastically deformed elastic deformation portion 56 will return to its original shape and play its role. The originally accumulated operating force causes the rocking body 45 to rock backward; in this way, in a state where the seat back 3 cannot be locked, even if the locking operation is performed, the rocking body 45 cannot be forced to rock, therefore, it is possible to prevent the seat back 3 from being locked. Moreover, even if the rocking body 45 is in a state that cannot be shaken, it is still possible to perform the operation of making the rotating body 44 rotate, and at the stage where it becomes possible to shake, the rocking body 45 automatically shakes, so it is not necessary to care whether The chair back support body 4 is tilted backward for operation; therefore, the chair can be used more freely;

When the seat back 3 is in the locked state by using the locking structure 23, once the occupant is behind the seat back, the rocker 45 is immediately rocked backward, and the upper ends of the side plates 45a, 45b are fitted into the recesses of the seat back support 4. In the state of 4h, when the seat back support body 4 is intended to be tilted backward, the support plate 4c of the seat back support body 4 hits the rocking body 45, so the support plate 4c promptly becomes the form of pressing the rocking body 45, and cannot The swinging body 45 is pulled back to the front, and in this state, the control handle 60 is controlled to rotate the rotating body 44 to the initial position, the elastic deformation part 56 of the chain lever 46 is elastically deformed, and the suction core intends to shake the swinging body 45. Therefore, in this state, once the occupant stops leaning against the seat back 3, the support plate 4c will leave the oscillating body 45, and the oscillating body 45 will be pulled back to the front. Therefore, the original elastic deformation The deformation part 56 exerts the operating force originally accumulated while returning to the original shape, and pulls the swing body 45 back to the front; in the locked state where the seat back 3 cannot be released, even if the lock release operation is performed, it still cannot be forced to move. The oscillating body 45 is shaken, so the damage of the constituent parts can be prevented; moreover, even if the oscillating body 45 is in a state that cannot be shaken, it is still possible to perform the operation of making the rotary body 44 rotate, and when it becomes possible to shake, the oscillating body 45 automatically Therefore, it is not necessary to care about whether the chair back support body 4 is tilted backward for operation, therefore, the chair can be used more freely.

As shown in accompanying drawings 20 to 22, on the seat fittings of the seat support body 6, the seat shell 38 can also be fixed with screws. 6. Use screws 54 to fix both;

As shown in accompanying drawing 23 and accompanying drawing 24, on the seat fitting of the seat support body 6, while fixing the thin shell 38 of the seat seat with screws, the armrest mounting fitting 39 can also be fixed on the seat by means of welding or the like. Seat support 6; in other words, above the recess 38a of the thin shell 38 of the seat, the seat support is configured, and when the two are fixed with screws 54, an armrest installation accessory 39 can also be provided to install the armrest;

As shown in accompanying drawings 25 to 27, the seat fittings of the seat support body 6 can also be welded to fix the seat mounting part 37, and at the same time, the seat plate 55 is fixed to the seat mounting part with screws. 37;

As shown in accompanying drawing 28 and accompanying drawing 29, it is also possible to extend the second oscillating central axis 8 and the third oscillating central axis 9, and utilize the seat reinforcement fittings of the seat support body 6 to connect the second oscillating central axis 8 and the third oscillating central axis. The three rocking central shafts 9 form hooks 38 b hooked on the second rocking central shaft 8 and the third rocking central shaft 9 on the top of the seat shell 38 , and the seat shell 38 is assembled on the seat support body 6 .

Claims (4)

1, a kind of Chair structure is characterized in that: comprise leg; Support the pedestal of leg; Be installed in the back support body on the chair back; Be installed in the seat support supporter on the seat support; Being provided with on pedestal retreats and link first of chair back supporter shakes central shaft; The position first shake central shaft the place ahead equal height or above, the seat support supporter shakes and is attached at second of pedestal and shakes central shaft; The position first and second shake between the central shaft, link this first and second shake the position of central shaft above more, back support body and seat support supporter are upper and lower to shaking binding, shake central shaft with the 3rd of the hypsokinesis interlock of back support body, rising, the 3rd shakes central shaft is linked to second and shakes central shaft; And make second sliding structure of shaking central shaft oblique upper guiding backward.

2, Chair structure according to claim 1 is characterized in that: described sliding structure is to shake central shaft with second, guides second structure that shakes central shaft with the mode of straight line or the circular-arc mode that is positioned at downside.

3, Chair structure according to claim 1 is characterized in that: described pedestal has the fixedly last Lock structure of back support body.

4, Chair structure according to claim 3 is characterized in that: the described Lock structure of going up has the fixedly rock body of back support body, is linked to the latch lever of this rock body, is linked to the operative configuration of this latch lever, and latch lever is provided with strain portion.

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