CN113475886A - Seat forward-leaning air spring mounting structure and air spring model selection method - Google Patents
Seat forward-leaning air spring mounting structure and air spring model selection method Download PDFInfo
- Publication number
- CN113475886A CN113475886A CN202110983600.4A CN202110983600A CN113475886A CN 113475886 A CN113475886 A CN 113475886A CN 202110983600 A CN202110983600 A CN 202110983600A CN 113475886 A CN113475886 A CN 113475886A
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- gas spring
- seat
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- cushion
- mounting seat
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- 238000010187 selection method Methods 0.000 title abstract description 7
- 238000009434 installation Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 14
- 230000005484 gravity Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims 2
- 238000011161 development Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 241001456553 Chanodichthys dabryi Species 0.000 description 1
- 206010023230 Joint stiffness Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 210000000629 knee joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
- A47C7/025—Springs not otherwise provided for in A47C7/22 - A47C7/35
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/002—Chair or stool bases
Abstract
The invention relates to the technical field of ergonomic chairs, in particular to a forward-inclined gas spring mounting structure of a chair, which comprises: the first mounting seat, the second mounting seat and the gas spring are arranged on the base; the first mounting seat is arranged at the bottom of the cushion, the second mounting seat is arranged at the top of the supporting seat, and the first mounting seat and the second mounting seat are hinged to the front side of the cushion; a first mounting part is arranged at one end, far away from the hinge point, of the first mounting seat, a second mounting part is arranged at one end, close to the hinge point, of the second mounting seat, the air spring is obliquely arranged, one end of the air spring is rotatably connected to the first mounting part, and the other end of the air spring is rotatably connected to the second mounting part; when the first mounting seat is at the maximum inclination angle relative to the second mounting seat, the thrust of the gas spring is tangent to the circumference taking the hinge point as the circle center, and the tangent point is the rotating connection point of the second mounting part and the gas spring. The invention provides a seat forward-inclined air spring mounting structure and a type selection method of an air spring, which improve the accuracy of type selection of the air spring and reduce the development cost of products.
Description
Technical Field
The invention relates to the technical field of ergonomic chairs, in particular to a forward-inclined gas spring mounting structure of a chair.
Background
After the chair is worked for a long time, the spine of the human body is in a pressed state, and the knee joints are inactive for a long time, so that the joints of the human body are uncomfortable, and therefore, the kneeling and sitting integrated chair is designed, the knee naturally leans against the kneeling cushion through forward leaning of the cushion, the upper part of the human body is passively straightened, and the effect of stretching the spine is achieved. In the high-strength office process, the problem of human joint stiffness is solved, the problems of humpback, forward neck inclination and the like are prevented, and the function of human plasticity is achieved.
However, the effect of the gas spring on the forward tilting of the cushion cannot be guaranteed, the installation and the type selection of the gas spring for the forward tilting of the cushion are determined according to empirical estimation, no accurate method can be used for reference, and in order to ensure that the thrust of the gas spring meets the requirement of the required bearing load, the gas spring with overlarge thrust is selected, so that the development cost of the product is high.
In view of the above problems, the present inventors have actively studied and innovated based on practical experience and professional knowledge that is abundant over many years in engineering applications of such products, and have intended to create a mounting structure of a forward tilting gas spring for a seat, so that the mounting structure has higher practicability.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the seat forward-inclined air spring mounting structure and the air spring type selection method are provided, accuracy of type selection of the air spring is improved, and development cost of products is reduced.
In order to achieve the purpose, the invention adopts the technical scheme that: a seat forward tilting gas spring mounting structure comprising: the first mounting seat, the second mounting seat and the gas spring are arranged on the base;
the first mounting seat is arranged at the bottom of a cushion of the seat, the second mounting seat is arranged at the top of a supporting seat of the seat, and the first mounting seat and the second mounting seat are hinged to the front side of the cushion;
a first mounting part is arranged at one end, far away from the hinge point, of the first mounting seat, a second mounting part is arranged at one end, close to the hinge point, of the second mounting seat, the air spring is arranged obliquely, one end of the air spring is rotatably connected to the first mounting part, and the other end of the air spring is rotatably connected to the second mounting part;
when the first mounting seat is at the maximum inclination angle relative to the second mounting seat, the thrust of the gas spring to the first mounting seat is tangent to the circumference taking a hinge point as a circle center, and the tangent point is a rotation connection point of the second mounting part and the gas spring.
Further, first mount pad orientation one side of cushion is equipped with a plurality of fixing bases, and is a plurality of the fixing base is followed air spring length direction equipartition sets up.
Further, the fixing base sets up 2 at least, the fixing base is bridge type structure, just the cavity orientation of bridge type the cushion.
Furthermore, the first installation part is a U-shaped groove, the gas spring is arranged in the U-shaped groove, and the opening of the U-shaped groove faces downwards; the one end that first mount pad kept away from the pin joint is equipped with T type shrouding, first installation department sets up T type shrouding department.
Further, the second mounting portion comprises two supports which are symmetrically arranged on a middle vertical plane where the axis of the gas spring is located, and the gas spring is rotatably arranged between the two supports;
when the air spring enables the first mounting seat to incline to the maximum inclination angle, the axis of the air spring is perpendicular to a connecting line of the rotating point of the second mounting part and the hinge point.
Furthermore, the gas spring is provided with a switch needle valve, and the switch needle valve controls the expansion and contraction of the gas spring through the action of external force;
the cushion bottom sets up the switch assembly, the switch assembly is right through line body structure the switch needle valve carries out the application of force.
Further, the gas spring pushes the first mounting seat to rotate around the hinge point relative to the second mounting seat;
in the process that the first installation seat rotates to the maximum inclination angle of the seat cushion from the horizontal state, the inclination angle between the first installation seat and the second installation seat is smaller than the included angle between the gas spring and the second installation seat.
The present invention also provides a method of shaping a gas spring to which the seat forward-tilting gas spring mounting structure according to any one of claims 1 to 7 is applied, the shaping of the gas spring including the steps of:
determining the position of a first mounting part of the gas spring on the first mounting seat;
when the first mounting seat is lifted to the maximum inclination angle, determining the position of the gas spring on a second mounting part of the second mounting seat;
when the cushion is horizontal to the maximum inclination angle, carrying out stress analysis on the air spring to obtain the maximum thrust F of the air spring;
and selecting the type of the gas spring according to the maximum thrust F of the gas spring.
Further, obtaining the maximum thrust F of the gas spring comprises the following steps:
when the first mounting seat is in a horizontal position, the load borne by the cushion and the air spring are subjected to stress analysis, and a first thrust F of the air spring is obtained1；
When the first mounting seat is gradually lifted, the load borne by the cushion and the air spring are subjected to stress analysis to obtain a second thrust F of the air spring2；
When the first mounting seat is lifted to the maximum inclination angle, carrying out stress analysis on the load borne by the cushion and the air spring to obtain a third thrust F of the air spring3；
Comparison F1、F2And F3To obtain the maximum thrust F of the gas spring when the first mounting seat is in the horizontal position.
Further, obtaining the thrust F of the gas spring further comprises:
according to the formula:
wherein: g represents that the cushion bears the gravity; l represents the distance from the center of gravity of the seat cushion to the hinge point; b represents the arm of the thrust; n represents the number of gas springs; k represents a safety factor, and k is 1.1;
wherein the thrust force F1Arm of force of b1Thrust force F2Arm of force b2Thrust force F3Arm of force of b3，
When the cushion is in the process of being horizontal to the maximum inclination angle, b1＜b2＜b3；
Thus, F1＞F2＞F3Thereby obtaining the maximum thrust force F.
The invention has the beneficial effects that: the invention provides a seat forward-tilting air spring mounting structure, which ensures that the air spring achieves the best effect on forward tilting of a cushion.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded view of a forward gas spring mounting structure for a seat in accordance with an embodiment of the present invention;
FIG. 2 is a front view of the mounting structure of the embodiment of the present invention with the seat cushion in a horizontal position;
FIG. 3 is a front view of the mounting structure of the embodiment of the present invention with the seat cushion in a forward tilted position;
FIG. 4 is a schematic diagram illustrating the variation of the moment of the gas spring thrust during forward tilting of the seat cushion according to the embodiment of the present invention;
FIG. 5 is a flowchart of a gas spring model selection method according to an embodiment of the present invention.
Reference numerals: 1. a first mounting seat; 2. a second mounting seat; 3. a gas spring; 4. a first mounting portion; 5. a second mounting portion; 6. a fixed seat 7 and a switch needle valve; 8. a switch assembly; 9. the hinge point.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The seat forward-tilting gas spring mounting structure shown in fig. 1 to 4 includes: the device comprises a first mounting seat 1, a second mounting seat 2 and a gas spring 3; the first installation seat 1 is arranged at the bottom of a cushion of the seat, the second installation seat 2 is arranged at the top of a supporting seat of the seat, and the first installation seat 1 and the second installation seat 2 are hinged to the front side of the cushion; a first mounting part 4 is arranged at one end of the first mounting seat 1 far away from the hinge point 9, a second mounting part 5 is arranged at one end of the second mounting seat 2 close to the hinge point 9, the gas spring 3 is obliquely arranged, one end of the gas spring is rotatably connected to the first mounting part 4, and the other end of the gas spring is rotatably connected to the second mounting part 5;
when the first mounting seat 1 is at the maximum inclination angle relative to the second mounting seat 2, the thrust of the gas spring 3 to the first mounting seat 1 is tangent to the circumference using the hinge point 9 as the center of circle, and the tangent point is the rotation connection point of the second mounting part 5 and the gas spring 3.
The invention provides a mounting structure of a seat forward-inclined gas spring 3 and an optimal type selection method of the gas spring 3, which improve the type selection accuracy of the gas spring 3 and reduce the development cost of products.
In order to guarantee the stability of cushion at the in-process that leans forward, one side of first mount pad 1 orientation cushion is equipped with a plurality of fixing bases 6, and a plurality of fixing bases 6 have improved along 3 length direction equipartitions of air spring setting
On the basis of the embodiment, the fixing seat 6 is at least provided with 2 fixing seats, the fixing seat 6 is of a bridge-shaped structure, the cavity of the bridge faces the cushion, the firmness of fixing the cushion is improved, and the cushion is stably inclined forwards under the thrust of the gas spring 3.
In a preferred embodiment of the present invention, the first mounting portion 4 is a U-shaped groove, the gas spring 3 is disposed in the U-shaped groove, the opening of the U-shaped groove faces downward, a T-shaped sealing plate is disposed at one end of the first mounting base 1 away from the hinge point 9, and the first mounting portion 4 is disposed at the T-shaped sealing plate.
When the first mounting part 4 tilts forward to the maximum inclination angle, in order to ensure that the air spring 3 can tilt the seat cushion forward, the thrust of the air spring 3 is far greater than the load borne by the seat cushion, therefore, the axis of the air spring 3 is tangent to a circle taking the distance between the second mounting part 5 and the hinge point 9 as a radius, specifically, the second mounting part 5 comprises two fixed seats 6 symmetrically arranged on a vertical plane where the axis of the air spring 3 is located, and the air spring 3 is rotatably arranged between the two fixed seats 6; when the gas spring 3 tilts the first mounting base 1 to the maximum tilt angle, the axis of the gas spring 3 is perpendicular to the line connecting the rotation point of the second mounting portion 5 and the hinge point 9.
In the preferred embodiment of the invention, the gas spring 3 is provided with a switch needle valve 7, and the switch needle valve 7 controls the expansion and contraction of the gas spring 3 through the action of external force; the bottom of the cushion is provided with a switch assembly 8, and the switch assembly 8 applies force to the switch needle valve 7 through a line body structure.
On the basis of the above embodiment, the gas spring 3 pushes the first mounting seat 1 to rotate around the hinge point 9 relative to the second mounting seat 2;
in the process that the first installation seat 1 rotates to the maximum inclination angle of the cushion from the horizontal state, the inclination angle between the first installation seat 1 and the second installation seat 2 is smaller than the included angle between the air spring 3 and the second installation seat 2, and the included angle exists between the initial thrust direction and the horizontal direction of the air spring 3, so that the feasibility of the thrust of the air spring 3 in the horizontal state of the cushion is ensured, the phenomenon that the thrust of the initial position of the air spring is too large, the air spring 3 is damaged due to the fact that the thrust of the air spring 3 is too large is avoided, and the best thrust of the air spring 3 for applying force to the cushion is ensured.
The invention provides a model selection method of a seat forward-inclined gas spring 3, and the model selection of the gas spring 3 shown in figure 5 comprises the following steps:
because the moment arm of the gas spring 3 to the hinge point 9 is far smaller than the moment arm of the load to the hinge point 9, the cushion can be lifted only by the thrust of the gas spring 3 being far larger than the load, the cushion is an ideal homogeneous model, and the gravity center of the cushion is the geometric center position;
the position of a first mounting part 4 of the gas spring 3 on the first mounting seat 1 is determined, so that the first mounting part 4 is arranged at the end part of the first mounting seat 1, the gas spring 3 is ensured to have the maximum extension arm length around a second mounting part 5 in the process of applying thrust to the cushion, and when the cushion is lifted in a horizontal state, the instant moment of the gas spring 3 on a hinge point 9 is more than or equal to the instant moment of the cushion on the hinge point 9 due to the bearing of gravity, so that the cushion is tilted forwards by the gas spring 3;
when the first mounting seat 1 is lifted to the maximum inclination angle, determining the position of the gas spring 3 on the second mounting part 5 of the second mounting seat 2; when the first mounting seat 1 of the gas spring 3 is lifted to the maximum inclination angle, the moment arm of the thrust of the gas spring 3 is the distance between the second mounting seat 2 and the hinge point 9, the axis of the gas spring 3 is tangent to a circle taking the moment arm as the radius, and the tangent point is the second mounting part 5;
when the cushion is horizontal to the maximum inclination angle, carrying out stress analysis on the gas spring 3 to obtain the maximum thrust F of the gas spring 3;
the model of the gas spring 3 is selected according to the maximum thrust F of the gas spring 3, and the maximum thrust satisfies that the gas spring 3 pushes the cushion to the maximum inclination angle from the horizontal direction, so that accurate model selection of the gas spring 3 is ensured, and the research and development design cost is reduced;
as a preference of the above embodiment, in order to ensure reliability and accuracy of the maximum thrust force, it comprises the following steps:
when the first mounting seat 1 is in a horizontal position, the load borne by the cushion and the gas spring 3 are subjected to stress analysis, and a first thrust F1 of the gas spring 3 is obtained;
when the first mounting seat 1 is gradually lifted up, the load borne by the cushion and the gas spring 3 are subjected to stress analysis, and a second thrust F2 of the gas spring 3 is obtained;
when the first mounting seat 1 is lifted to the maximum inclination angle, the load borne by the cushion and the gas spring 3 are subjected to stress analysis, and a third thrust F3 of the gas spring 3 is obtained;
the magnitudes of F1, F2, and F3 are compared to find that the thrust force F of the gas spring 3 obtained is the largest when the first mount 1 is in the horizontal position.
Specifically, obtaining the thrust force F of the gas spring further comprises:
according to the formula:
wherein G represents that the cushion bears the gravity; l represents the distance from the center of gravity of the seat cushion to the hinge point; b represents the arm of the thrust; n represents the number of gas springs; k represents a safety factor, and k is 1.1;
thus, the thrust force F1Arm of force of b1Thrust force F2Arm of force b2Thrust force F3Arm of force of b3；
When the cushion is in the process of being horizontal to the maximum inclination angle, b1＜b2＜b3；
Thus, F1＞F2＞F3(ii) a Thus, when the cushion is in the horizontal state, the instant thrust F of forward inclination occurs when the cushion is pushed1Is the maximum thrust F.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a seat gas spring mounting structure that leans forward which characterized in that includes: the device comprises a first mounting seat (1), a second mounting seat (2) and a gas spring (3);
the first installation seat (1) is arranged at the bottom of a cushion of the seat, the second installation seat (2) is arranged at the top of a supporting seat of the seat, and the first installation seat (1) and the second installation seat (2) are hinged to the front side of the cushion;
a first mounting part (4) is arranged at one end, far away from a hinge point (9), of the first mounting seat (1), a second mounting part (5) is arranged at one end, close to the hinge point (9), of the second mounting seat (2), the air spring (3) is obliquely arranged, one end of the air spring is rotatably connected to the first mounting part (4), and the other end of the air spring is rotatably connected to the second mounting part (5);
when the first mounting seat (1) is at the maximum inclination angle relative to the second mounting seat (2), the thrust of the gas spring (3) to the first mounting seat (1) is tangent to the circumference which takes a hinge point (9) as the circle center, and the tangent point is the rotation connection point of the second mounting part (5) and the gas spring (3).
2. A seat forward-leaning gas spring mounting structure according to claim 1, wherein a plurality of fixing seats (6) are arranged on one side of the first mounting seat (1) facing the seat cushion, and the plurality of fixing seats (6) are uniformly distributed along the length direction of the gas spring (3).
3. A seat forward-leaning gas spring mounting structure according to claim 2, wherein at least 2 fixing seats (6) are provided, the fixing seats (6) are in a bridge-shaped structure, and cavities of the bridge-shaped structure face the seat cushion.
4. The seat forward-leaning gas spring mounting structure according to claim 1, wherein the first mounting portion (4) is a U-shaped groove, the gas spring (3) is arranged in the U-shaped groove, the U-shaped groove is opened downwards, a T-shaped sealing plate is arranged at one end, away from the hinge point (9), of the first mounting seat (1), and the first mounting portion (4) is arranged at the T-shaped sealing plate.
5. A seat forward-leaning gas spring mounting structure according to claim 1, wherein the second mounting portion (5) comprises two supports symmetrically arranged with respect to a vertical plane in which an axis of the gas spring (3) is located, and the gas spring (3) is rotatably arranged between the two supports;
when the gas spring (3) enables the first mounting seat (1) to incline to the maximum inclination angle, the axis of the gas spring (3) is perpendicular to a connecting line of a rotating point of the second mounting part (5) and the hinge point (9).
6. The seat forward-tilting gas spring mounting structure according to claim 1, characterized in that the gas spring (3) is provided with a switch needle valve (7), and the switch needle valve (7) controls the expansion and contraction of the gas spring (3) by an external force;
the cushion bottom sets up switch assembly (8), switch assembly (8) are right through the line body structure switch needle valve (7) carry out the application of force.
7. Seat forward tilting gas spring mounting structure according to claim 6, characterized in that the gas spring (3) urges the first mounting seat (1) to rotate relative to the second mounting seat (2) about the hinge point (9);
in the process that the first installation seat (1) rotates to the maximum inclination angle of the seat cushion from the horizontal state, the inclination angle between the first installation seat (1) and the second installation seat (2) is smaller than the included angle between the gas spring (3) and the second installation seat (2).
8. A method of shaping a gas spring, using the seat forward tilting gas spring mounting structure according to any one of claims 1 to 7, the gas spring shaping comprising the steps of:
determining the position of a first mounting part (4) of the gas spring (3) on the first mounting seat (1);
when the first mounting seat (1) is lifted to the maximum inclination angle, determining the position of the gas spring (3) on a second mounting part (5) of the second mounting seat (2);
when the cushion is horizontally lifted to the maximum inclination angle, carrying out stress analysis on the air spring (3) to obtain the maximum thrust F of the air spring (3);
and selecting the type of the gas spring (3) according to the maximum thrust F of the gas spring (3).
9. The sizing method for a gas spring as defined in claim 8, wherein obtaining a maximum thrust F of said gas spring comprises the steps of:
when the first mounting seat (1) is in a horizontal position, carrying out stress analysis on the load borne by the cushion and the gas spring (3) to obtain a first thrust F1 of the gas spring (3);
when the first mounting seat (1) is gradually lifted, the load borne by the cushion and the gas spring (3) are subjected to stress analysis, and a second thrust F2 of the gas spring (3) is obtained;
when the first mounting seat (1) is lifted to the maximum inclination angle, carrying out stress analysis on the load borne by the cushion and the gas spring (3) to obtain a third thrust F3 of the gas spring (3);
comparing the sizes of F1, F2 and F3 to find that the thrust F of the gas spring (3) is maximum when the first mounting seat (1) is in a horizontal position.
10. The method of sizing a gas spring as recited in claim 9, wherein obtaining a thrust force F of said gas spring further comprises:
according to the formula:
wherein: g represents that the cushion bears the gravity; l represents the distance from the center of gravity of the seat cushion to the hinge point; b represents the arm of the thrust;
n represents the number of gas springs; k represents a safety factor, and k is 1.1;
wherein the thrust force F1Arm of force of b1Thrust force F2Arm of force b2Thrust force F3Arm of force of b3；
When the cushion is in the process of being horizontal to the maximum inclination angle, b1＜b2＜b3；
Thus, F1＞F2＞F3Thereby obtaining the maximum thrust force F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110983600.4A CN113475886A (en) | 2021-08-25 | 2021-08-25 | Seat forward-leaning air spring mounting structure and air spring model selection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110983600.4A CN113475886A (en) | 2021-08-25 | 2021-08-25 | Seat forward-leaning air spring mounting structure and air spring model selection method |
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| CN113475886A true CN113475886A (en) | 2021-10-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0030806A2 (en) * | 1979-12-13 | 1981-06-24 | Labofa A/S | Chair with adjustable seat mechanism |
| US20070210634A1 (en) * | 2000-03-23 | 2007-09-13 | Jonathan Krehm | Ergonomic Chair |
| CN205267568U (en) * | 2015-12-15 | 2016-06-01 | 浙江安吉祥泰家具有限公司 | Chair tray structure |
| CN109717652A (en) * | 2019-03-11 | 2019-05-07 | 湖北工程学院新技术学院 | A kind of cushion tilt adjustable section office seating structure |
| CN112190056A (en) * | 2020-07-31 | 2021-01-08 | 朱彦青 | Standing-up assisting seat device and using method thereof |
-
2021
- 2021-08-25 CN CN202110983600.4A patent/CN113475886A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0030806A2 (en) * | 1979-12-13 | 1981-06-24 | Labofa A/S | Chair with adjustable seat mechanism |
| US20070210634A1 (en) * | 2000-03-23 | 2007-09-13 | Jonathan Krehm | Ergonomic Chair |
| CN205267568U (en) * | 2015-12-15 | 2016-06-01 | 浙江安吉祥泰家具有限公司 | Chair tray structure |
| CN109717652A (en) * | 2019-03-11 | 2019-05-07 | 湖北工程学院新技术学院 | A kind of cushion tilt adjustable section office seating structure |
| CN112190056A (en) * | 2020-07-31 | 2021-01-08 | 朱彦青 | Standing-up assisting seat device and using method thereof |
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