WO2022222422A1

WO2022222422A1 - Chair seat mechanism

Info

Publication number: WO2022222422A1
Application number: PCT/CN2021/128696
Authority: WO
Inventors: 郑彬; 孟振林; 潘文原; 杨堃; 谢秋平
Original assignee: 安吉德卡办公系统有限公司
Priority date: 2021-04-22
Filing date: 2021-11-04
Publication date: 2022-10-27
Also published as: CN113229655A; CN113229655B

Abstract

A chair seat mechanism, comprising a fixed base (2) and a chair seat (3). The fixed base (2) is provided with a rotation shaft (41), which extends in a front-back direction and penetrates a front side wall and a rear side wall of the fixed base; the chair seat (3) is located above the fixed base (2), and front and rear ends of the chair seat are respectively fixedly connected to front and rear ends of the rotation shaft (41); the rotation shaft (41) is connected to swing structures (42), which extend in the radial direction of the rotation shaft and are located on two sides of the rotation shaft; a space, which allows the swing structures (42) to swing up and down from a horizontal state, is provided in the fixed base (2); a damping structure (5) made of an elastic material is arranged in the fixed base (2), and can be pressed by the swing structures (42) to generate damping when the swing structures (42) swing, the damping being enhanced along with the increase of the swinging amplitude; and the damping structure (5) is provided with an adjustment structure (6), which is used for adjusting the magnitude of initial damping, generated by the damping structure (5), for the swing structures (42).

Description

a seat mechanism

technical field

The invention relates to a seat mechanism, which is mainly used in the technical field of office chairs or leisure chairs.

Background technique

In the prior art, for most chairs with trays (including office chairs and leisure chairs), the function of the seat to swing left and right is achieved by the tray, and some chairs can also be tilted back and forth, which is also achieved by the tray. That is, the functions of the chair swinging left and right and tilting back and forth are all integrated into the tray.

technical problem

For example, a patent application with publication number CN110313742A discloses a seat support structure, including a tray bracket and a seat plate arranged on the tray bracket, and a swing assembly is provided between the tray bracket and the seat plate, characterized in that: the swing assembly It includes an upper base plate and a lower base plate arranged up and down, the upper base plate is fixedly connected to the bottom of the seat plate, the lower base plate is fixedly connected to the top of the tray support, an elastic piece and a plurality of connecting pieces are arranged between the upper base plate and the lower base plate, and the upper end of the connecting piece is The lower end of the connecting piece penetrates through the lower base plate and restricts the downward movement of the lower base plate, and the plurality of connecting pieces are arranged in a straight line, and the elastic piece is arranged around the connecting piece. The swing component of the seat support structure is provided with a plurality of connecting pieces, and the plurality of connecting pieces are arranged in a straight line in the front and rear, so that the seat can swing left and right, and the front and rear swing of the seat can be restrained to reduce the front and rear swing of the seat. The support structure disclosed in this patent can realize the left and right swing of the seat (seat plate). Although the amplitude of the front and rear swing can be reduced by the arrangement of the connecting piece, it will still cause the instability of the seat seat to swing left and right, resulting in poor user experience. , and a small swing in the front and rear directions will produce a jittery feeling, which makes the user easily feel frightened.

For example, the patent application with publication number CN110710815A discloses a dynamic tray, including: a first base; a second base that is rotatably connected to the first base; a first crank, one end of the first crank is hinged to the first base ; The other end of the first crank is hinged with an elastic relay connection, and the elastic relay connection is used to connect the support of the base; the second crank, the two ends of the second crank are respectively hinged with the second base and the receiving part, and the receiving part is Rigid, and the receiving member is used to connect the seat support member, and the receiving member is located at the upper end of the second base; the rocker is configured to connect the seat back assembly, and the rocker is integrated with the second crank; the elastic reset device is used to make After the rocker moves the second crank, the second crank can be restored to its original position.

The patent application is constructed on the principle of four-bar linkage. The gravity exerted by the human body on the receiving part forms an antagonistic relationship with the driving force of the rocker and achieves a relative balance; It also has the function of tilting and swinging left and right, which can automatically adapt to the changes of the user's sitting posture when tilting back and forth and swinging left and right. In this patent application, the functions of swinging left and right and tilting back and forth are all integrated into the dynamic tray. Limited by the size of the tray, the seat support, the second base, the receiving member and the second crank that can swing left and right are spatially arranged. Due to the large limitation, the amplitude of left and right swing is limited. The strength of these components and the overall strength after assembly are also relatively weak under the limitation of the tray volume. After long-term use, it is prone to structural damage such as bending deformation. .

The left and right swing of the patent application is realized by a four-link structure, and by setting a swing reset mechanism with a spring, the elasticity generated during the swing gradually increases the resistance and plays a role of reset, but the elastic modulus of the swing reset mechanism is What cannot be changed, that is, the overall flexibility of the swing reset mechanism cannot be adjusted by adjusting the overall hardness of the swing reset mechanism, which is defective in optimizing the user's experience.

Although the patent does not mention the armrest of the chair, it can be known from the context of the patent and the accompanying drawings that the armrest of the chair can only be fixedly connected with the tray or the seat. Therefore, when the seat swings left and right, the armrest of the chair also swings in the same range. Since the overall flexibility cannot be adjusted when swaying left and right, the arm is usually supported on the armrest when the user sits upright. In addition, the overall center of gravity of the user's upper body will deviate from the range of the seat, which is easy to cause the user to fall, so there is a certain safety hazard.

In addition, the front and rear tilting of the patent is realized through the seat back, and the seat does not have the function of tilting back and forth.

Another example is the patent application of publication number CN111904196A, which discloses a chair and its swing tray, including a second swing mechanism and a first swing mechanism. The first swing mechanism includes a first base, two first spring assemblies and a first swing mechanism. connecting shaft, the first base is fixedly connected with the seat, one end of the first spring assembly is connected with the first base and the other end is connected with the second swing mechanism, the first connecting shaft is fixedly connected with the first base, the first connecting shaft It is distributed along the X direction and is rotatably mounted on the second swing mechanism, and the first base is mounted on the second swing mechanism through the first connecting shaft so as to swing left and right. In this patent application, a first swing mechanism that can swing left and right is added to the original second swing mechanism that can be tilted back and forth, and the added first swing mechanism does not interfere with the internal structure of the second swing mechanism. The functions of front and rear tilting are all integrated in the tray, resulting in a more complex structure in the tray and a more compact space layout, which compresses the amplitude of the left and right swing and the front and rear tilt, and also affects the first swing mechanism and the second swing mechanism. Structural strength. The first swing mechanism of this application that realizes the left-right swing also has the problems mentioned in the above-mentioned CN110710815A.

The technical problem to be solved by the present invention is to provide a seat that can swing left and right, which can better control the swing amplitude, and can adjust the overall flexibility of the seat seat to swing left and right.

technical solutions

The present invention is achieved through the following technical solutions.

A seat mechanism includes a fixed seat and a seat, the fixed seat is provided with a rotating shaft extending in the front-rear direction and passing through its front and rear side walls; the seat is located above the fixed seat, and its front and rear ends are respectively connected with the rotating shaft. The front and rear ends are fixedly connected; the rotating shaft is connected with a swing structure extending along its radial direction and located on both sides thereof, and the fixed seat has a space for allowing the swing structure to swing up and down from a horizontal state; the fixed seat is provided with The damping structure of elastic material can be squeezed to produce damping when the swinging structure swings, and the damping is enhanced with the increase of the swinging amplitude; the damping structure is provided with an adjusting structure for adjusting the initial The size of the damping.

The compression of the damping structure will apply elastic force to the swing structure, thereby producing damping to the swing structure, and as the swing amplitude of the swing structure increases, the damping also increases, and the flexibility of the swing is inversely proportional to the swing amplitude, so that the user can The swinging amplitude of the seat can be better controlled, and the swinging speed can be braked before the swinging structure abuts against the stopping structure, so that the process of stopping the seat after swinging to the maximum amplitude is more stable.

The size of the initial damping of the damping structure is adjusted by adjusting the structure. Since the damping generated by the damping structure increases with the increase of the swing amplitude, the overall flexibility of the left and right swing of the seat seat can be adjusted after the initial damping is adjusted.

As a further improvement of the present invention, the adjustment structure is made of rigid material, a part of which is located outside the damping structure, and the other part is embedded inside the damping structure; the damping structure defines a package wrapped in the adjustment structure and its diffusion affected by the package. The formed hard part with enhanced hardness and the flexible part with unenhanced hardness; the ratio of the two parts inside and outside the adjusting structure located in the damping structure can be adjusted.

As a further improvement of the present invention, a concave accommodating groove is formed on the bottom plate of the fixed seat below one end of the swing structure away from the rotating shaft, and the damping structure is placed in the accommodating groove; the groove bottom of the accommodating groove is opened There is a through hole, the damping structure has a plug channel that communicates with the through hole and extends upward, and the adjustment structure is rod-shaped and inserted into the plug channel through the through hole.

As a further improvement of the present invention, the accommodating groove has a ring of flange structures extending upward along the periphery of the through hole, and the plug channel is formed with a step structure abutting on the top of the flange structure; the adjustment The structure threadedly mates with the flange structure.

As a further improvement of the present invention, the left and right side surfaces of the damping structure are inclined slope surfaces, and the two side surfaces are gathered at the top of the damping structure to form a chamfered portion that is in contact with the swing structure and is squeezed.

As a further improvement of the present invention, the bottom surface of the swing structure has a straight groove formed inwardly and extending in the front-rear direction; when the swing structure swings, the chamfered portion of the damping structure is embedded in the straight groove.

As a further improvement of the present invention, the bottom surface of the swing structure also has a circular groove formed inwardly concave and communicated with the linear groove; the inwardly concave depth of the circular groove is greater than that of the linear groove; the insertion channel of the damping structure When fully inserted by the adjustment structure, the portion of the chamfered portion supported by the top end of the adjustment structure is embedded in the circular groove when the swing structure swings.

As a further improvement of the present invention, the plug channel penetrates the top end of the damping structure and forms an opening, and the damping structure extends along the periphery of the opening and has a closing structure that contracts toward the center of the opening and has a compression amount in the vertical direction; damping structure When the plug channel is completely inserted by the adjusting structure, the closing structure is supported on the top end of the adjusting structure.

As a further improvement of the present invention, the damping structure is coated with an adhesive layer on the surface of the accommodating groove and the flange structure.

As a further improvement of the present invention, the bottom end of the adjusting structure is provided with a screw cap.

beneficial effect

1. When the damping structure is squeezed, it damps the swing structure, making the swing more stable;

2. According to the proportion of the adjustment structure inserted into the damping structure, the overall hardness of the damping structure can be adjusted, and then the initial damping can be adjusted, so that the flexibility of the seat seat can be controlled.

Description of drawings

The preferred embodiments of the present invention will be described in detail below through the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

Fig. 1 is the structural schematic diagram of the chair that can swing left and right in implementation case 1;

Fig. 2 is the structural schematic diagram of the top plate of the fixed seat in the implementation case 1;

Fig. 3 is the structural schematic diagram of the rotating shaft of implementation case 1;

Fig. 4 is the structural schematic diagram of the seat frame of the implementation case 1;

FIG. 5 is a schematic cross-sectional view of a fixed seat in implementation case 2;

FIG. 6 is a schematic cross-sectional view of the damping structure and the adjustment structure of the implementation case 2;

Fig. 7 is the structural schematic diagram of the damping structure of implementation case 2;

FIG. 8 is a schematic diagram of the bottom surface of the swing structure in Example 2. FIG.

Embodiments of the present invention

The present invention will be further described in detail below according to the accompanying drawings and implementation examples.

Orientation terms such as upper, lower, left, right, front, rear, front, back, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to the configurations shown in the drawings, the word "" "Inner" and "outer" refer to directions toward or away from the geometric center of a particular component, respectively, and they are relative concepts, so they may vary accordingly according to their different positions and different states of use. Therefore, these and other terms of orientation should not be construed as limiting.

Implementation case 1:

1-4, a chair that can swing left and right includes a chair foot frame 12 supported on the ground, a tray 11 connected to the top of the chair foot frame 12, and a seat back 13 connected to the rear end of the tray 11, fixed on the tray 11. The fixed seat 2 at the top, the seat 3 whose front and rear ends are hinged on the front and rear side walls of the fixed seat 2 respectively, the armrest frame 14 that is fixedly connected to the left and right sides of the fixed seat 2 and extends upward, and is arranged at the top of the armrest frame 14 and is high. on the armrest structure 141 of the seat 3 .

The fixed seat 2 presents a boxed structure with a certain thickness, and its specific hinge connection with the seat 3 is as follows: the fixed seat 2 is provided with a rotating shaft 41 extending in the front-rear direction and passing through the front and rear side walls of the fixed seat 2. The above-mentioned front and rear direction And the left and right directions described later are all taking the chair as a reference object, and the direction facing the chair is defined as the front, and the direction facing the back is defined as the rear; The two ends are fixedly connected, and the seat 3 can be rotated around the rotating shaft 41 to realize its function of swinging left and right.

In the prior art, for most chairs with a tray 11, the seat 3, the armrest frame 14, and the seat back 13 are directly fixed on the tray 11, and the tray 11 can be rotated relative to the chair foot frame 12, back and forth, left and right, thereby driving The seat 3, the armrest frame 14, and the seat back 13 tilt forward and backward and swing left and right. In the present application, when the seat 3 swings left and right, the leg frame 12 , the tray 11 , the armrest 14 and the seat back 13 are all stationary, that is, the rest of the chair except the seat 3 is stationary. moveable.

First of all, if the damping of the left and right swing of the seat 3 is small, the flexibility of the swing will be relatively high. The user end sits on the seat 3, as long as the seat 3 is slightly shaken to the left or right, the seat 3 will swing rapidly. The armrest frame 14 and the seat back 13 will also swing rapidly accordingly. The user's arm is supported on the armrest frame 14, so the entire upper body of the user will be quickly inclined to the left or right side, which will not only make the user There is a sense of panic caused by the instability of the center of gravity. In addition, there will also be potential safety hazards. If the user's attention is not fully focused on controlling the amplitude of the swing, the swing amplitude is too large, which will cause the user's upper body center of gravity to shift too much, and it is easy to fall. In the present application, the armrest 14 is stationary when the seat 3 swings left and right, even if the seat 3 has a high degree of flexibility and a large swing range, as long as the user's arm is supported on the armrest structure 141, Then, the overall center of gravity of the upper body of the user can still be limited within the range of the seat 3, which can avoid a sense of shock, and there is no potential safety hazard.

Secondly, in the prior art, the chair's functions of tilting back and forth and rocking left and right depend on the tray 11, and the structure for realizing the function of tilting back and forth and the structure for realizing the function of rocking left and right are integrated in the tray 11, and there is no interference in the structure. Under the premise that the two structures are relatively complex; in addition, limited by the small volume of the tray 11, the structural strength and structural stability of the two structures are also defective, and structural deformation is prone to occur after long-term use. Two kinds of problems may arise, one is that the front and rear tilting, the amplitude and flexibility of the left and right swing are problematic, and even cannot be executed; the other is that the two structures interfere with each other, so that the front and rear tilting and the left and right swing cannot be performed at the same time. In the present application, the structure for swinging the seat 3 from side to side is separated from the tray 11 and arranged in the fixed seat 2, and the structure for tilting back and forth can only be provided in the tray 11, which not only saves the structure for rocking left and right, The structure in the tray 11 is simplified, and the space in the tray 11 is more abundant, so that the strength and stability of the front and rear tilting structure can be further enhanced. In addition, the separation of the fixed seat 2 and the rotating shaft 41 from the tray 11 not only allows for simultaneous tilting and swinging, but also there is no risk of mechanical interference at all.

Furthermore, in the prior art, since the tray 11 integrates the two functions of tilting forward and backward and swinging left and right, these two actions have four directions, that is, during these two actions, four front and rear, left, right, and four directions are applied to the chair leg 12 during these two actions. Therefore, the fixed connection strength between the tray 11 and the chair leg 12 is required to be high. In the present application, on the premise that the tray 11 does not have the function of swinging from side to side, the chair leg frame 12 can only exert a force in the front and rear directions at most, so the requirements for the connection strength between the tray 11 and the chair leg frame 12 are also corresponding. been lowered.

The seat 3 includes a seat frame 31 and a seat surface 32. The front frame portion 31-1 and the rear frame portion 31-2 of the seat frame 31 are arc-shaped and both sides are raised upward, and are naturally curved to the left and right. The two side frame parts 31-3, the two side frame parts 31-3 are arched to avoid the armrest frame 14, and the apex formed by the arches is close to the front frame part 31-1. The edge of the seat surface 32 is connected to the seat frame 31 and presents an ergonomic curved surface. When sitting upright, it is more suitable for the physiological curve of the buttocks, and also has a certain sense of wrapping in the left and right directions; the seat surface 32 is an arched surface along the left and right side frame parts 31-3 in the front and rear directions, and the arched The apex is close to the front side, and when the user sits on the seat surface 32 , the buttocks can be brought closer to the seat back 13 , so that the center of gravity of the overall structure formed by the user's upper body, the rotating shaft 41 and the swing structure 42 described later is basically coincident, so that the left and right sides of the seat 3 are substantially overlapped. The swing is smoother. In addition, the length of the front frame portion 31-1 is slightly longer than that of the rear frame portion 31-2, so that the width of the front portion of the seat surface 32 is larger than the rear portion, which allows the user to naturally slightly open his legs when sitting, which is more comfortable.

The seat frame 31 is formed with a top frame surface 31-A for connecting the edge of the seat surface 32, a slope surface 31-B formed by the inner edge of the top frame surface 31-A extending inward and allowing the seat surface 32 to sag, the seat surface 32 Multi-layer mesh cloth with certain elasticity is selected, and the edges are glued and fixed on the top frame surface 31-A of the seat frame 31 by adhesive. The seat surface 32, which is breathable and has a certain elasticity, can make the user more comfortable.

The rotating shaft 41 is integrally connected with a swinging structure 42 extending along its radial direction and located on both sides thereof. The fixing base 2 is provided with a stopping structure 21 under one end of the swinging structure 42 away from the rotating shaft 41. When the swing structure 42 swings downward to a certain extent, its end away from the rotating shaft 41 abuts against the stop structure 21, preventing the swing structure 42 from continuing to swing downward, thus limiting the seat 3 to the left and right. The amplitude of the swing. The swing structure 42 is connected to the position of the rotating shaft 41 close to the rear side wall, so the overall structure formed by the rotating shaft 41 and the swing structure 42 is relatively close to the seat back 13, which is consistent with the overall center of gravity when the user sits on the seat 3, reducing the number of pairs of rotating shafts. The radial effect of 41 makes the left and right swing of the seat 3 more stable.

The swinging structure 42 includes a flat swinging plate 42-1 extending radially along the rotating shaft 41, and upright reinforcing ribs 42-2 extending from two sides of the swinging plate 42-1. The rear fixing plate 44 and the two swing structures 42 are connected with a reinforcing column 45 extending in the front-rear direction. The rear side wall of the fixed seat 2 is provided with an escape groove 2-1 extending in the vertical direction and allowing the reinforcing column 45 to pass through. The reinforcing column 45 Pass through the reinforcing rib 42 - 2 close to the rear fixing plate 44 and be fixedly connected to the reinforcing rib 42 - 2 far away from the rear fixing plate 44 . On the one hand, the reinforcement column 45 can strengthen the overall structural strength of the rotating shaft 41, the rear fixing plate 44 and the swing structure 42, and distribute the force load to avoid the occurrence of bending deformation. On the other hand, it can also play the role of counterweight. The overall center of gravity is close to the seat back 13, which enhances the stability of the seat 3 swinging from side to side.

The front and rear ends of the rotating shaft 41 are respectively provided with a front fixing plate 43 and a rear fixing plate 44 extending along the left-right direction. The fixed connection of the rear frame portion 31-2 strengthens the fixed connection strength of the rotating shaft 41 and the seat 3, reduces the force load of the rotating shaft 41, and avoids structural damage.

The rear fixing plate 44 and the front fixing plate 43 are arc-shaped panels that fit the arc shapes of the rear frame portion 31-2 and the front frame portion 31-1, wherein the rear fixing plate 44 is attached to the rear frame portion 31-2, and passes The rear fixing plate 44 and the rear frame portion 31-2 are fixedly connected by a plurality of fasteners in the front-rear direction, and the top edge of the front fixing plate 43 is horizontally extended forward to form an extension fixing plate 431, the extension fixing plate 431 and the front fixing plate 43 It is fastened to the front frame portion 31-1, and the extending fixing plate 431 and the front frame portion 31-1 are fixedly connected in the up-down direction through a plurality of fasteners. And these two ways of being fixedly connected with the seat 3 in different directions make the seat 3 have relatively firm connection strength with the rotating shaft 41 in the front-rear direction and the up-down direction, so that the user sits in different positions of the seat 3 with In the case of different centers of gravity, the seat 3 will not be deformed or the front and rear ends will be lifted.

Both ends of the rotating shaft 41 are sleeved with a shaft sleeve 411 , and the outer end of the shaft sleeve 411 has a ring of flanges 411 - 1 protruding in the radial direction. The flange 411 - 1 abuts against the front side wall of the fixed seat 2 /rear side wall, so that the movement of the rotating shaft 41 along its axial direction can be avoided, so the seat 3 will not be loosened in the front-rear direction.

The fixed seat 2 is provided with a beam structure 22 extending in the left and right direction and passing through its left and right side walls. The weighing structure is passed through the lower part of the rotating shaft 41 and is fixed on the bottom plate of the fixed seat 2. The two ends of the beam structure 22 are respectively connected with the two handrail frames 14 The bottom end of the armrest is fixedly connected, the user's arm is supported on the armrest structure 141, and a downward force will be applied to the armrest frame 14, and the force load of the connection point between the armrest frame 14 and the fixed seat 2 is relatively large, and the long time Problems such as bending deformation are prone to occur after use, and the beam structure 22 can improve the strength of the connection point.

Implementation case 2:

Referring to FIGS. 5-8 , on the basis of the implementation case 1, two damping structures 5 corresponding to the swing structure 42 are arranged in the fixed seat 2 . The damping structure 5 is made of elastic material, and the swing structure 42 rotates with the rotation shaft 41 When swinging, the damping structure 5 will be squeezed by the swinging structure 42 to generate damping, and the damping increases with the increase of the swinging amplitude. The damping structure 5 is further provided with an adjusting structure 6 for adjusting the magnitude of the initial damping generated by the damping structure 5 to the swing structure 42 .

The damping structure 5 made of elastic material is squeezed by the oscillating structure 42 when it oscillates, and the compression of the damping structure 5 will exert an elastic force that prevents the oscillating structure 42 from continuing to oscillate, thereby producing damping to the oscillating structure 42, and with the swinging amplitude of the oscillating structure 42 When the seat 3 swings left and right, the flexibility of the swing is inversely proportional to the amplitude of the swing, so that the user can better control the seat 3 The swing amplitude can be stopped before the swing structure 42 abuts against the stop structure 21, so that the process of stopping the seat 3 after swinging to the maximum amplitude is more stable, reducing the frustration and making the customer more comfortable.

According to different user experience requirements, there are also different requirements for the overall flexibility of the seat 3 to swing left and right. Therefore, an adjustment structure 6 is provided on the damping structure 5, and the initial damping of the damping structure 5 is adjusted by the adjustment structure 6. Since The damping generated by the damping structure 5 increases as the swinging amplitude increases, so the overall flexibility of the left and right swinging of the seat 3 can be adjusted after the initial damping is adjusted.

The adjusting structure 6 is a rigid material, a part of which is located outside the damping structure 5, and the other part is embedded in the damping structure 5, and the adjusting structure 6 of this part is tightly wrapped by the damping structure 5, so that the adjusting structure 6 The effect of support is produced, the hardness is enhanced, and the hardness of the damping structure 5 affected by the wrapping is also enhanced, so that the position and size of the damping structure 5 embedded by the adjusting structure 6 limit the wrapping in the adjusting structure 6 and its size. The hard part 5-1 with increased hardness formed by diffusion under the influence of the encapsulation, and the flexible part 5-2 whose hardness is not reinforced. Although the hardness of the rigid portion 5-1 decreases with the increase of the distance adjustment structure 6, the hardness of the rigid portion 5-1 is still enhanced compared with the flexible portion 5-2. The flexible portion 5-2 and the damping structure The elasticity of the initial state of the damping structure 5 is basically the same, so when the adjusting structure 6 is partially embedded in the damping structure 5, the overall stiffness of the damping structure 5 is enhanced. The proportion of the adjustment structure 6 located in the inner and outer parts of the damping structure 5 can be adjusted. By adjusting the proportion of the adjustment structure 6 embedded in the damping structure 5, the overall hardness of the damping structure 5 can be adjusted, that is, the initial damping of the damping structure 5 can be adjusted, so as to realize the chair The overall flexibility of seat 3 swinging from side to side.

Further, a concave accommodating groove 23 is formed on the bottom plate of the fixed seat 2 below the end of the swing structure 42 away from the rotating shaft 41 , and the damping structure 5 is placed in the accommodating groove 23 , and its length in the front-rear direction is slightly larger than that of the swing structure 42 The width of the swing structure 42 has a margin in the front-rear direction. The bottom of the accommodating groove 23 is provided with a through hole 23-A through which the upper line passes through, and the damping structure 5 is provided with an upwardly extending insertion channel 5-A from the bottom end. The through holes 23-A communicate with each other, and the adjustment structure 6 is a rod-shaped structure and its length is longer than the insertion channel 5-A.

The hard part 5-1 and the flexible part 5-2 are roughly divided by the horizontal line at the top of the adjustment structure 6, and the part between the damping structure 5 from the bottom to the horizontal line at the top of the adjustment structure 6 is the hard part 5-1, the damping structure The part between the horizontal line from the top to the top of the adjustment structure 6 is the flexible part 5-2. The depth of the adjustment structure 6 inserted into the insertion channel 5-A determines the height of the horizontal line at the top of the adjustment structure 6. Therefore, by adjusting the insertion depth of the adjustment structure 6, the overall hardness of the damping structure 5 can be adjusted, and the initial damping of the damping structure 5 can be adjusted.

It is worth noting that the damping structures 5 located on both sides of the rotating shaft 41 are independent of each other, so the initial damping of the two damping structures 5 is also set independently. Some users have special requirements for left and right swinging, such as the left and right small joints of the spine. Dislocated users need high swing flexibility in one direction and low flexibility in the other direction.

The accommodating groove 23 has a ring of flange structures 231 extending upward along the periphery of the through hole 23-A. Correspondingly, the plug channel 5-A is formed with a step structure 51 abutting on the top of the flange structure 231, so that the flange The structure 231 and the plug channel 5-A are extensible, and the inner diameters of the two are approximately the same. The adjustment structure 6 is threaded with the flange structure 231, so that the adjustment structure 6 can accurately control the depth of the insertion channel 5-A, and also The adjustment structure 6 can be prevented from sliding or even slipping off in the axial direction. In addition, the upper part of the adjustment structure 6, that is, the part inserted into the plug channel 5-A, can be processed with some anti-skid lines or anti-skid bumps on its surface to enhance the friction coefficient with the damping structure 5, thereby improving the resistance to the hard part 5-A. The hardness enhancement of 1 expands the adjustment range of the initial damping; however, it will increase the strength required to adjust the position of the adjustment structure 6 in the axial direction. Therefore, the anti-skid pattern or anti-skid bump needs to be comprehensively considered to reasonably set its coverage and radial direction of the adjustment structure 6. bulge thickness.

The damping structure 5 extends in the front-rear direction, and its section is basically triangular, that is, the left and right sides 5-L of the damping structure 5 are inclined slopes, and the two sides 5-L are gathered at the top of the damping structure 5 to form a The chamfered portion 52 that the rocking structure 42 contacts and is squeezed may have a circular arc transition or a polygonal shape with corners. The shape setting of the damping structure 5 has two main functions. A space is reserved between the damping structure 5 with a triangular cross-section and the accommodating groove 23. When the swing structure 42 squeezes the damping structure 5, the damping structure 5 is deformed and gradually becomes flat and wider, so the reserved space can allow Deformation of the damping structure 5 . The chamfered portion 52 is pressed by the swing structure 42 to form a belt-shaped contact surface extending in the front-rear direction. The width of the contact surface increases with the swing amplitude. On the one hand, the chamfered portion 52 can reduce the contact surface with the swing structure 42 . The contact area makes the damping on the swing structure 42 more concentrated. On the other hand, the damping also increases with the swing amplitude, and the area of the contact surface also increases synchronously with the swing amplitude, which can make the damping structure 5 bear the force. The load is relatively uniform, avoiding excessive compression of the top to prolong its service life.

The bottom surface of the swing structure 42 has a linear groove 42-A formed inwardly and extending in the front-rear direction. The side faces 5-L are matched, and the chamfered portion 52 of the damping structure 5 is embedded in the straight groove 42-A when the swing structure 42 swings, which plays a role in positioning the chamfered portion 52 and can avoid the chamfered portion 52 and the swing structure 42. The frictional sliding in the left-right direction reduces the frictional loss to the damping structure 5 .

When the adjustment structure 6 pushes against the top of the insertion channel 5-A, the adjustment structure 6 on both sides of the rotating shaft 41 bears against the two swing structures 42 of the rotating shaft 41, thereby locking the seat 3 so that it cannot swing left and right, The top of the adjustment structure 6 will support the top of the damping structure 5 . The bottom surface of the rocking structure 42 has a circular groove 42-B formed inwardly and communicating with the linear groove 42-A. The circular groove 42-B is recessed inwardly deeper than the linear groove 42-A. The portion of the corner portion 52 supported by the top end of the adjustment structure 6 is inserted into the circular groove 42-B, thereby preventing slippage.

The plug channel 5 -A does not completely penetrate the top of the damping structure 5 , so as to prevent the adjustment structure 6 from penetrating from the top of the damping structure 5 and colliding with the swing structure 42 rigidly. Therefore, the insertion channel 5-A penetrates the top end of the damping structure 5 and forms an opening 5-B, and the damping structure 5 extends along the periphery of the opening 5-B with a closing structure 53 that shrinks toward the center of the opening. The insertion channel 5-B of the damping structure 5- When A is completely inserted by the adjustment structure 6 , the closing structure 53 is supported on the top end of the adjustment structure 6 , thereby separating the top end of the adjustment structure 6 from the swing structure 42 . In addition, the closing structure 53 has a compression amount in the vertical direction, and presents an arch that is upwardly arched from the outer edge to the inner edge in structure, so as to have a deformation margin when being squeezed by the swing structure 42 to prevent extrusion from occurring. damaged condition.

In order to avoid the over-insertion of the adjustment structure 6 so as to push up the damping structure 5 upward, an adhesive layer is coated on the surface of the damping structure 5 that is attached to the accommodating groove 23 and the flange structure 231 , so as to bond the damping structure 5 to the accommodating groove 23 and the flange structure 231 in the accommodating groove 23 . In addition, in order to facilitate the rotation of the adjustment structure 6 , a screw cap 61 is provided at the bottom end of the adjustment structure 6 .

Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing implementation cases, those of ordinary skill in the art should understand that it can still be Modifications are made to the technical solutions recorded in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

A seat mechanism is characterized in that it includes a fixed seat and a seat, the fixed seat is provided with a rotating shaft extending in the front-rear direction and passing through its front and rear side walls; the seat is located above the fixed seat, and its front and rear ends They are respectively fixedly connected to the front and rear ends of the rotating shaft; the rotating shaft is connected with a swinging structure extending along its radial direction and located on both sides of the rotating shaft, and the fixed seat has a space for allowing the swinging structure to swing up and down from a horizontal state; the fixed The seat is provided with a damping structure of elastic material, which can be squeezed to produce damping when the swinging structure swings, and the damping is enhanced with the increase of the swinging amplitude; the damping structure is provided with an adjusting structure, which is used to adjust the damping structure to the swinging. The amount of initial damping produced by the structure.
The seat mechanism according to claim 1, wherein the adjustment structure is a rigid material, a part of which is located outside the damping structure, and the other part is embedded in the damping structure; The adjustment structure and the hard part with increased hardness and the flexible part with unenhanced hardness formed by the diffusion under the influence of the wrapping structure; the proportion of the adjustment structure located in the inner and outer parts of the damping structure can be adjusted.
The seat mechanism according to claim 2, wherein a concave accommodating groove is formed on the bottom plate of the fixed seat below one end of the swing structure away from the rotating shaft, and the damping structure is placed in the accommodating groove; A through hole is formed at the bottom of the accommodating slot, the damping structure has an insertion channel communicating with the through hole and extending upward, and the adjusting structure is rod-shaped and inserted into the insertion channel through the through hole.
The seat mechanism according to claim 3, wherein the accommodating groove has a ring of flange structures extending upward along the periphery of the through hole, and the insertion channel is formed to abut against the flange structure The step structure on the top; the adjustment structure is screwed with the flange structure.
The seat mechanism according to claim 3, wherein the left and right sides of the damping structure are inclined slopes, and the two sides are gathered at the top of the damping structure to form contact with the swing structure and be squeezed Pressed chamfer.
The seat mechanism according to claim 5, wherein the bottom surface of the swing structure has a linear groove formed inwardly and extending in the front-rear direction; when the swing structure swings, the chamfered portion of the damping structure is embedded in the straight groove.
The seat mechanism according to claim 6, wherein the bottom surface of the swing structure further has a circular groove formed inwardly and communicated with the linear groove; the depth of the inward depression of the circular groove is greater than that of the linear groove In the case that the plug channel of the damping structure is completely inserted by the adjustment structure, the part of the chamfered portion supported by the top end of the adjustment structure is embedded in the circular groove when the swing structure swings.
The seat mechanism according to claim 7, wherein the insertion channel penetrates through the top end of the damping structure and forms an opening, and the damping structure extends along the periphery of the opening and contracts toward the center of the opening and has a vertical direction. The closing structure of the compression amount; when the plug channel of the damping structure is completely inserted by the adjusting structure, the closing structure is supported on the top end of the adjusting structure.
The seat mechanism according to claim 3, wherein the damping structure is adhered to the surface of the accommodating groove and the flange structure and is coated with an adhesive layer.
The seat mechanism according to claim 3, wherein the bottom end of the adjusting structure is provided with a screw cap.