CN217447127U

CN217447127U - Self-adaptive back-pursuing kneeling chair

Info

Publication number: CN217447127U
Application number: CN202221538496.4U
Authority: CN
Inventors: 戴龙飞; 丁晓强; 詹慧娟; 魏涛
Original assignee: Hangzhou Damonguan Smart Home Technology Co ltd
Current assignee: Hangzhou Damonguan Smart Home Technology Co ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-09-20
Anticipated expiration: 2032-06-20

Abstract

The utility model relates to a self-adaptive back-tracing kneeling chair, which comprises a base, wherein a chair back frame is rotatably connected on the side wall of the base, a chair back is connected on the chair back frame, a switching frame is arranged between the base and the chair back frame, a fixed rotating shaft and a movable rotating shaft are connected between the end part of the switching frame and the base, the fixed rotating shaft is relatively fixed with the base in the length direction of the base, and the movable rotating shaft can relatively slide in the length direction of the base; the base is also internally provided with an elastic pressing piece; in a standing state, the elastic pressing piece presses the movable rotating shaft so that the chair back frame inclines towards the front side; under the leaning state, the generated leaning force enables the chair back frame to rotate around the fixed rotating shaft and incline backwards so as to drive the movable rotating shaft to move together, the elastic force generated by the elastic pressing piece can be used for pressing against the acting force generated when people lean on the chair back, so that the chair back always has the tendency of inclining forwards, and the chair back can also be always attached to the waist and back of a human body under the action of the elastic force when the sitting posture is changed.

Description

Self-adaptive back-pursuing kneeling chair

Technical Field

The utility model belongs to the technical field of the thing to sit on, especially, relate to a self-adaptation chases after one's back kneels chair.

Background

Kneeling chairs, also called correction chairs, were originally designed and formed by Norwegian designers, overturned the traditional chairs, and are suitable for people who have low back pain, have humpbacked due to poor sitting posture and need to develop correct sitting posture, so the kneeling chairs have been widely accepted in the market.

In order to improve the comfort when sitting, chinese patent No. CN201810386175.9 discloses a kneeling chair with a convenient inclination angle adjustment, which can adjust the angle of the seat cushion bracket and the reclining bracket respectively to meet the requirement, wherein the bottom end of the reclining bracket is hinged to the rear end of the seat cushion bracket through a first threaded shaft, the first threaded shaft is provided with a first adjusting handle, and the reclining bracket can be rotated by rotating the first adjusting handle to meet the requirement for use.

Although the regulation that can realize the angle satisfies different crowds ' demand, nevertheless because the back frame behind the angle regulation is relatively immobile, and human position of sitting changes constantly, consequently the back frame can't keep laminating human back always, can lead to user's experience to be felt relatively poorly, if want to keep the state of laminating human back always, then need one to adjust very trouble through first regulation handle.

Disclosure of Invention

In order to solve the technical problem, the utility model aims at providing a self-adaptation kneels the chair with the back, elasticity contact part can support and press the activity pivot and make the back of the chair be in the state that leans forward all the time, and elasticity that elasticity contact part produced to the support of activity pivot can be used to the effort that produces when resisting anti human dependence to make the back of the chair can adapt to laminating waist back all the time automatically.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a self-adaptive back-pursuing kneeling chair comprises a base with an opening on the top surface, wherein a chair back frame is rotatably connected to the side wall of the base, a chair back is connected to the chair back frame, a switching frame for supporting the chair back frame is arranged between the base and the chair back frame, a fixed rotating shaft and a movable rotating shaft are connected between the end part of the switching frame and the base, the fixed rotating shaft is relatively fixed with the base in the length direction of the base, and the movable rotating shaft can relatively slide in the length direction of the base; an elastic pressing piece used for pressing the movable rotating shaft is further arranged in the base; in a standing state, the elastic pressing piece presses the movable rotating shaft so that the chair back frame inclines towards the front side; under the leaning state, the generated leaning force enables the chair back frame to rotate around the fixed rotating shaft and tilt backwards so as to drive the movable rotating shaft to move together, and the elastic force of the elastic pressing piece resists the leaning force so as to enable the chair back to be always attached to the back of a human body.

In the use of the kneeling chair, a user often leans forwards to enable knees and shanks to be supported on kneeling cushions, so that the user can sit more comfortably. The chair back frame is connected to the side wall of the base through the fixed rotating shaft and the movable rotating shaft, so that the chair back frame and the chair back can rotate around the fixed rotating shaft, and the movable rotating shaft is driven to rotate together; therefore, when the elastic pressing piece is arranged in the base to press the movable rotating shaft, the chair back frame and the chair back can also be driven to rotate around the fixed rotating shaft; under the state of stewing, back of the chair frame and back of the chair are in the state that leans forward all the time, can produce the leaning force when someone leans on and drive back of the chair and back of the chair frame and rotate the slope backward, and this leaning force can be resisted to the elasticity that elasticity pressing piece had this moment for back of the chair frame and back of the chair still have the trend of leaning forward, thereby the human back of laminating. When the body of a user leans forward to reduce the leaning force or does not lean, the elastic force can continuously press the movable rotating shaft to drive the chair back frame and the chair back to continuously lean forward, so that the action of tracing the back of the human body is realized, and the chair back can be tightly attached to the waist and the back of the human body.

Preferably, the adapter rack is a U-shaped frame structure formed by connecting and enclosing three connecting plates, the whole chair back rack is arc-shaped, the bottom end of the chair back rack is provided with an installation cavity matched with the adapter rack, and the adapter rack can extend into the installation cavity and is detachably connected with the side wall corresponding to the installation cavity through a bolt.

The connecting frame plays a role in connection on one hand, so that the connection between the chair back frame and the base is more stable, if the bottom end of the chair back frame is directly connected with the base, the connection point position and the contact area are not enough, a person can be easily damaged when leaning on the chair back frame, the connecting frame can extend into the mounting cavity to support the chair back frame, the connection stress area is increased, and the stability of the connection of the chair back frame is greatly improved; on the other hand, the switching frame can also reduce abrasion caused by friction between the rotation of the chair back frame and the base, and if the chair back frame is directly connected with the base, the loose abrasion condition is easy to occur under the rotation of long-term use.

Preferably, the fixing of the fixed rotating shaft relative to the base in the length direction of the base means that: the fixed rotating shaft is rotatably connected to the side wall of the base and extends to the outer side of the base, and two ends of the fixed rotating shaft extending out are also rotatably connected with the switching frame respectively; the movable rotating shaft can slide relatively in the length direction of the base, and the movable rotating shaft refers to the following steps: the two side walls of the base are provided with arc-shaped strip-shaped holes corresponding to the positions, the movable rotating shaft is arranged in the strip-shaped holes, and the two ends of the movable rotating shaft also extend out of the outer side of the base to be rotatably connected with the switching frame.

The fixed rotating shaft is connected with the chair back frame and the base, a point position capable of relatively rotating between the chair back frame and the base is provided, the movable rotating shaft can move in the arc-shaped strip-shaped hole under the pressing of the elastic pressing piece, and the effect of chair back tracing is achieved through the pressing rotation of the movable rotating shaft.

Preferably, the elastic pressing piece is a torsion spring which is sleeved on the fixed rotating shaft, one of two end heads of the torsion spring presses the bottom surface of the base, and the other end head of the torsion spring presses the top end of the movable rotating shaft.

The torsion spring is simple in structure and convenient to install, and the space inside the base cannot be occupied when the torsion spring is sleeved on the fixed rotating shaft.

Preferably, the base is further movably connected with a limiting mechanism for limiting deflection of the seat back frame, the limiting mechanism comprises a drawing rod vertically and slidably connected to a side wall of the base, the drawing rod extends to the outer side of the other side wall of the base, a protruding portion extending obliquely downwards is arranged at the top of the connecting plate located at the end where the drawing rod extends out, and the protruding portion abuts against the upper portion of the drawing rod.

In the specific use process, if the back tracing effect of the chair back is not needed, the chair back can always keep the same inclination angle through the limiting of the limiting mechanism, and only the pulling rod is required to be pushed to enable one end of the pulling rod to be clamped with the protruding part, so that the rotation of the switching frame and the chair back frame connected with the switching frame is limited. The back-tracing effect is recovered, and the pulling rod is pulled outwards to be separated from the protruding part to be clamped.

Preferably, a spring is sleeved on the part, inside the base, of the pull rod, an insertion hole is formed in the position, where the end part of the spring is located, of the pull rod, and a plug pin used for limiting the movement of the spring is arranged inside the insertion hole; two ends of the spring are respectively abutted against the bolt and the side wall of the base.

The function of the spring can enable the drawing rod to have the function of resetting, and when the function of back pursuing needs to be closed, only the drawing rod needs to be pushed, and one end of the drawing rod is clamped with the protruding part; when the function is closed, the drawing rod is pulled reversely, so that the end part of the drawing rod is separated from the protruding part, and the back-tracing function is recovered; when the device needs to reset, the device is tilted backwards to the position where the drawing rod is exposed, and the drawing rod is touched by hand to be matched with the elastic force of the spring, so that the drawing rod is reset.

Preferably, a seat is arranged on the base, an installation beam extending obliquely downwards is further arranged on the front side of the base, kneelers are arranged at the end portions of the installation beam, support rods extending upwards are arranged on the installation beam, and chest supports are arranged at the tops of the support rods.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the elastic force generated by the elastic pressing piece can be used for pressing the acting force generated by the anti-human leaning, so that the chair back always has the tendency of forward inclination, and therefore, when the sitting posture changes, the chair back can always fit the waist and back of the human body under the action of the elastic force;

2. the setting up of switching frame can improve the fastness that back of the chair frame and base are connected on the one hand, also can avoid the wearing and tearing of the lug connection of back of the chair frame and base when rotating, and on the other hand switching frame also is convenient for make the back of the chair have with stop gear cooperation and pursue back of the body and relatively fixed two kinds of states.

Drawings

FIG. 1 is a schematic view of the overall structure of the chair for pursuing back and kneeling in accordance with the present invention;

FIG. 2 is a first schematic diagram of an exploded structure of the back-kneeling chair of the present invention;

FIG. 3 is a schematic diagram of an exploded structure of the back-kneeling chair of the present invention;

fig. 4 is a third schematic diagram of the explosion structure of the back-kneeling chair of the present invention.

Description of the drawings: 1. a base; 2. a back of chair frame; 201. installing a chamber; 3. a transfer rack; 301. a connecting plate; 302. a protrusion; 4. fixing the rotating shaft; 5. a movable rotating shaft; 6. an elastic pressing member; 7. a chair back; 8. a strip-shaped hole; 9. a pull rod; 10. a spring; 11. a jack; 12. a chair seat; 13. mounting a beam; 14. a kneeling pad; 15. a stay bar; 16. and (5) chest support.

Detailed Description

The following describes in detail an embodiment of the present invention with reference to the drawings.

In the embodiment, a self-adaptive back-pursuing kneeling chair is specifically disclosed, as shown in fig. 1-4, the self-adaptive back-pursuing kneeling chair specifically comprises a base 1 with an opening on the top surface, a back frame 2 is further rotatably connected to the side wall of the base 1, a back 7 is connected to the back frame 2, a switching frame 3 for supporting the back frame 2 is arranged between the base 1 and the back frame 2, a fixed rotating shaft 4 and a movable rotating shaft 5 are connected between the end of the switching frame 3 and the base 1, the fixed rotating shaft 4 is relatively fixed with the base 1 in the length direction of the base 1, and the movable rotating shaft 5 can relatively slide in the length direction of the base 1; an elastic pressing piece 6 for pressing the movable rotating shaft 5 is further arranged in the base 1; in a standing state, the elastic pressing piece 6 presses the movable rotating shaft 5 to enable the backrest frame 2 to incline towards the front side; in the leaning state, the generated leaning force enables the chair back frame 2 to rotate around the fixed rotating shaft 4 and tilt backwards so as to drive the movable rotating shaft 5 to move together, and the elastic force of the elastic pressing piece 6 resists the leaning force so as to enable the chair back 7 to be always attached to the back of a human body.

In addition, a seat 12 is arranged on the base 1, an installation beam 13 extending obliquely downwards is further arranged on the front side of the base 1, a kneeler 14 is arranged at the end part of the installation beam 13, a support rod 15 extending upwards is arranged on the installation beam 13, and a chest support 16 is arranged at the top of the support rod 15.

When a user uses the kneeling chair, the user usually puts or supports knees or shanks on the kneeling cushions 14 to improve the sitting comfort, but the back of the user inevitably inclines forwards and falls off from the joint of the back of the chair 7, and the comfort is also reduced.

In this embodiment, the back frame 2 is connected to the base 1 through the adapting frame 3, the adapting frame 3 is connected to the base 1 through the fixed rotating shaft 4 and the movable rotating shaft 5, the movable rotating shaft 5 can move in the length direction of the base 1, and the fixed rotating shaft 4 can only rotate at the connection point, so that the back frame 2 can drive the movable rotating shaft 5 to correspondingly move when rotating, or the movable rotating shaft 5 can also drive the back frame 2 to rotate when moving. An elastic pressing piece 6 is arranged in the base 1, so that the elastic force generated by the elastic pressing piece always presses the movable rotating shaft 5; in a standing state, when the chair back 7 does not lean, the elastic pressing piece 6 presses the movable rotating shaft 5 to the lowest position, and the chair back 7 is in a forward tilting state; when a user sits and leans, leaning force can be generated to enable the chair back 7 to be inclined backwards, and the elastic force can resist the leaning force to enable the chair back frame 2 and the chair back 7 to always have the tendency of being inclined forwards, namely the tendency of being attached to the waist and the back; when the user removes the leaning force or the leaning force is reduced, the elastic pressing piece 6 continuously presses the movable rotating shaft 5, so that the chair back frame 2 rotates and continuously rotates towards the waist and back of the human body, and the function of back tracing is realized.

The adapter rack 3 is a U-shaped frame structure formed by connecting three connecting plates 301, the whole back of the chair frame 2 is arc-shaped, the bottom end of the back of the chair frame is provided with an installation cavity 201 matched with the adapter rack 3, and the adapter rack 3 can extend into the installation cavity 201 and is detachably connected with the side wall corresponding to the installation cavity 201 through bolts.

The adapter rack 3 improves the stability of the connection between the chair back rack 2 and the base 1 on one hand, and reduces the abrasion caused by the direct connection between the chair back rack 2 and the base 1 on the other hand, if the chair back rack 2 is directly connected with the base 1, the connection point positions are not enough, the contact area is smaller, and further the chair back rack is easy to damage in the subsequent use; meanwhile, under long-term use, the abrasion between the backrest frame 2 and the base 1 is also serious, and further, the connection is unstable, so that damage is caused. The adapting frame 3 can directly extend into the mounting chamber 201 to support the bottom end of the chair back frame 2, thereby increasing the connecting area of the chair back frame 2 and avoiding the abrasion between the chair back frame 2 and the base 1.

The fixed rotating shaft 4 is fixed relative to the base 1 in the length direction of the base 1, and the fixed rotating shaft means that: the fixed rotating shaft 4 is rotatably connected to the side wall of the base 1 and extends to the outer side of the base 1, and two ends of the fixed rotating shaft 4 extending outwards are also rotatably connected with the switching frame 3 respectively; the relative sliding of the movable rotating shaft 5 in the length direction of the base 1 means that: arc-shaped strip-shaped holes 8 are formed in the two side walls of the base 1 at corresponding positions, the movable rotating shaft 5 is arranged in the strip-shaped holes 8, two ends of the movable rotating shaft also extend out of the base 1 and are rotatably connected with the switching frame 3.

The fixed rotating shaft 4 provides a point position for the rotation connection of the back frame 2, and the movable rotating shaft 5 can move in the arc-shaped strip-shaped hole 8 around the fixed rotating shaft 4 when being pressed by the elastic pressing piece 6 to drive the back frame 2 to rotate correspondingly.

The elastic pressing piece 6 is a torsion spring which is sleeved on the fixed rotating shaft 4, one of two end heads of the torsion spring presses the bottom surface of the base 1, and the other end head of the torsion spring presses the top end of the movable rotating shaft 5.

The torsional spring chooses for use on the one hand simple structure, simple to operate only need cup joint it to fixed rotating shaft 4 on, with two ends respectively support press base 1 bottom surface and 5 tops of activity pivot simultaneously can, on the other hand also need not occupy too much space for base 1's whole volume can reduce, and then improves holistic aesthetic property.

In the actual use process, the user does not need to trace back under any circumstances, and if the user wants to close the function, the user only needs to open or close the limiting mechanism, and the structure of the device includes a pull rod 9 vertically and slidably connected to the side wall of the base 1, the pull rod 9 extends to the outside of the other side wall of the base 1, the top of the connecting plate 301 at the end where the pull rod 9 extends out is provided with a protrusion 302 extending obliquely downwards, and the protrusion 302 abuts against the upper part of the pull rod 3.

When the back tracing function needs to be closed, the pulling rod 9 is pushed to extend to the other side of the base 1, so that the pulling rod is clamped with the protruding part 302, and the rotation of the adapter rack 3 and the chair back rack 2 connected with the adapter rack is limited. When the back tracing function needs to be reused, the back tracing effect can be achieved again only by pulling the pull rod 9 outwards to separate the pull rod from the clamping connection with the protruding part 302.

In order to prevent the drawing rod 9 from being drawn out too long or prevent the drawing rod 9 from sliding out to obstruct the experience of a user in the using process, a spring 10 is sleeved on the part of the drawing rod 9 in the base 1, an insertion hole 11 is formed in the position of the end part of the spring 10 of the drawing rod 9, and a bolt for limiting the movement of the spring 10 is arranged in the insertion hole 11; two ends of the spring 10 are respectively abutted against the bolt and the side wall of the base 1.

When the drawing rod 9 is pulled outwards, the spring 10 is compressed under the blocking of the bolt, and if the drawing rod 9 is loosened, the drawing rod 9 can return to the original position under the action of elasticity theoretically; but the pulling rod 9 is in a reset ready state due to the blocking of the connecting plate, and the pulling rod 9 is always in a back-chasing state when unlocked because the elasticity of the torsion spring is large enough, so that the pulling rod is difficult to reach the final backward-leaning position in general; when the back tracing function needs to be closed, the back reaches the final backward bending state by force backward bending, namely the movable rotating shaft 5 is arranged at the rear upper end of the strip-shaped hole 8, and at the moment, the spring 10 resets to enable the pull rod to be pushed out of the base and to be abutted against the connecting plate again.

The above description in this specification is merely illustrative of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The self-adaptive back-pursuing kneeling chair comprises a base (1) with an opening in the top surface, wherein a chair back frame (2) is rotatably connected to the side wall of the base (1), and a chair back (7) is connected to the chair back frame (2), and is characterized in that a switching frame (3) for supporting the chair back frame (2) is arranged between the base (1) and the chair back frame (2), a fixed rotating shaft (4) and a movable rotating shaft (5) are connected between the end part of the switching frame (3) and the base (1), the fixed rotating shaft (4) is relatively fixed with the base (1) in the length direction of the base (1), and the movable rotating shaft (5) can relatively slide in the length direction of the base (1); an elastic pressing piece (6) used for pressing the movable rotating shaft (5) is further arranged in the base (1); in a standing state, the elastic pressing piece (6) presses the movable rotating shaft (5) to enable the chair back frame (2) to incline towards the front side; under the leaning state, the generated leaning force enables the chair back frame (2) to rotate around the fixed rotating shaft (4) and tilt backwards so as to drive the movable rotating shaft (5) to move together, and the elastic force of the elastic pressing piece (6) resists the leaning force so as to enable the chair back (7) to be attached to the back of a human body all the time.

2. The adaptive back-pursuing kneeling chair according to claim 1, wherein the adapter frame (3) is a U-shaped frame structure formed by connecting and enclosing three connecting plates (301), the whole chair back frame (2) is arc-shaped, the bottom end of the chair back frame is provided with a mounting chamber (201) matched with the adapter frame (3), and the adapter frame (3) can extend into the mounting chamber (201) and is detachably connected with the side wall corresponding to the mounting chamber (201) through a bolt.

3. The adaptive kneeling and kneeling chair according to claim 1, wherein the fixation of the fixed shaft (4) to the base (1) in the length direction of the base (1) is: the fixed rotating shaft (4) is rotatably connected to the side wall of the base (1) and extends to the outer side of the base (1), and two ends, extending out, of the fixed rotating shaft (4) are also rotatably connected with the switching frame (3) respectively; the movable rotating shaft (5) can slide relatively in the length direction of the base (1) and is characterized in that: arc-shaped strip-shaped holes (8) are formed in the two side walls of the base (1) at corresponding positions, the movable rotating shaft (5) is arranged in the strip-shaped holes (8), and the two ends of the movable rotating shaft also extend out of the outer side of the base (1) to be rotatably connected with the switching frame (3).

4. The self-adaptive back-following kneeling chair according to claim 1, wherein the elastic pressing piece (6) is a torsion spring which is sleeved on the fixed rotating shaft (4), one of two ends of the torsion spring presses the bottom surface of the base (1), and the other end of the torsion spring presses the top end of the movable rotating shaft (5).

5. The adaptive back-pursuing kneeling chair according to claim 2, characterized in that the base (1) is also movably connected with a limiting mechanism for limiting the deflection of the back frame (2), the limiting mechanism comprises a drawing rod (9) vertically and slidably connected to the side wall of the base (1), the drawing rod (9) extends to the outer side of the other side wall of the base (1), the top of the connecting plate (301) at the end from which the drawing rod (9) extends out is provided with a projection (302) extending obliquely downwards, and the projection (302) abuts on the drawing rod (9).

6. The adaptive back-pursuing kneeling chair according to claim 5, characterized in that the part of the drawing rod (9) in the base (1) is sleeved with a spring (10), the drawing rod (9) is provided with a jack (11) at the position of the end of the spring (10), the jack (11) is provided with a bolt for limiting the movement of the spring (10); two ends of the spring (10) are respectively abutted against the bolt and the side wall of the base (1).

7. The adaptive kneeling and kneeling chair as claimed in claim 1, wherein the base (1) is provided with a seat (12), the front side of the base (1) is further provided with a mounting beam (13) extending obliquely downwards, the end of the mounting beam (13) is provided with a kneeler (14), the mounting beam (13) is provided with a stay bar (15) extending upwards, and the top of the stay bar (15) is provided with a chest support (16).