Gravity self-adapting adjustment mechanism for chair seat and back

Abstract

The utility model discloses a gravity self -adaptation adjusting mechanism for chair seat chair back, including seat base and with the rotation cooperation of chair seat, the end of seat base is provided with the chair back, is provided with the self -adaptation adjusting mechanism and position locking mechanism in seat base cavity, the self -adaptation adjusting mechanism is used for chair seat and chair back linkage cooperation, and position locking mechanism is used for the position locking of self -adaptation adjusting mechanism in the stroke, and the bottom of seat base is provided with feedback adjusting mechanism, and feedback adjusting mechanism is cooperated with the self -adaptation adjusting mechanism, the utility model discloses the self -adaptation adjusting mechanism of linkage chair seat and chair back, can realize the position locking of position locking mechanism in its stroke, and feedback adjusting mechanism is cooperated with the self -adaptation adjusting mechanism, has the significant advantages of self -adaptation adjusting precision, position locking nimble, feedback adjusting intelligence, greatly promotes the remarkable advantage of seat use comfort and convenience.

Description

TECHNICAL FIELD

[0001] The utility model belongs to chair technical field especially relates to a gravity self -adaptation adjusting mechanism for chair seat back. BACKGROUND

[0002] In modern office and home environment, as the core carrier of human engineering, the dynamic adjustment performance of the chair directly affects the health and work efficiency of the user, according to the ergonomics research, the ideal chair should be able to sense the change of human body gravity in real time, and realize the dynamic distribution of supporting force through the coordinated movement of mechanical structure, however, the current mainstream chair adjusting mechanism still has the following deep technical contradictions in mechanical response characteristics and man-machine interaction mechanism.

[0003] In detail, first, the adjusting mechanism between the traditional chair seat and back adopts the support mode of preset spring or air pressure rod, cannot sense the real-time change of human dynamic pressure distribution, causes the supporting force of lumbar vertebra and chair surface to be unable to form dynamic balance when sitting for a long time, especially in the complex action of user leaning forward, leaning back, the linkage angle of chair seat and back cannot be matched with the human body gravity transfer track synchronously, second, the existing position locking device is mostly dependent on ratchet tooth groove or friction plate structure, the locking precision is limited by the tooth gap, and the unlocking operation needs to be realized through a complex lever system, the positioning deviation problem caused by tooth surface wear is prone to occur after high-frequency use.

[0004] Therefore, in order to optimize the function of the adjusting mechanism of the chair, the practitioner designs a gravity self-adaptive adjusting mechanism for chair seat back. INVENTION CONTENTS

[0005] The utility model aims at solving the adjusting mechanism between the traditional chair seat and back, cannot match human dynamic pressure in real time, and the position locking device has the problems of limited precision and easy wear and offset, and provides a gravity self-adaptive adjusting mechanism for chair seat back.

[0006] The utility model realizes the above-mentioned purpose through the following technical scheme: a gravity self-adaptive adjusting mechanism for chair seat back, including chair base and the chair seat that is rotationally cooperated with it, the end of chair base is rotationally provided with chair back, the cavity of chair base is provided with adaptive adjusting mechanism and position locking mechanism, the adaptive adjusting mechanism is used for linkage cooperation of chair seat and chair back, the position locking mechanism is used for locking at any position in the stroke of adaptive adjusting mechanism, the bottom of chair base is provided with feedback adjusting mechanism, and the feedback adjusting mechanism is matched with adaptive adjusting mechanism.

[0007] Further, the chair back connecting rod is rotationally arranged in the cavity of chair back, and the other end of the chair back connecting rod is connected to the chair base through a rotating shaft.

[0008] Further, the self-adapting adjusting mechanism comprises a pressing tooth and a following translation piece, and the pressing tooth and the following translation piece are connected through a linkage rod.

[0009] Further, the end of the following translation piece penetrates through the seat base sidewall and is connected with the chair back, and an arc-shaped slot for guiding the movement of the following translation piece is arranged on the seat base sidewall.

[0010] Further, the position locking mechanism comprises a locking tooth matched with the pressing tooth, and a handle for driving the rotation of the locking tooth is arranged on the locking tooth, and the handle penetrates through the seat base and is arranged outside the seat base.

[0011] Further, the feedback adjusting mechanism comprises an adjusting sleeve arranged on the bottom of the pressing tooth, and an elastic piece is arranged in the cavity of the adjusting sleeve, and an adjusting bolt is arranged at the bottom of the seat base, and the end of the adjusting bolt abuts against the adjusting sleeve.

[0012] Beneficial effects: the self-adapting chair has the following beneficial effects due to the reasonable design and simple and stable structure and strong practicability:

[0013] 1. self-adapting and precise fitting: the self-adapting adjusting mechanism composed of the unique pressing tooth, the following translation piece and the linkage rod can sensitively capture the human body movement, precisely link the chair seat and the chair back, perfectly match the center of gravity shift when the user performs complex actions such as leaning forward and leaning backward, and keep the user comfortable and balanced at all times;

[0014] 2. flexible and reliable position locking: the position locking mechanism utilizes the cooperation of the locking tooth and the pressing tooth, and is matched with the external handle, so that the operation is convenient, the stepless and precise locking can be realized within the stroke of the self-adapting adjusting mechanism, and the positioning deviation is not prone to occurring after high-frequency use, and the stability is excellent;

[0015] 3. intelligent and efficient feedback adjusting: the feedback adjusting mechanism cooperates with the adjusting sleeve, the elastic piece and the adjusting bolt, optimizes the adjusting process in real time, greatly improves the adjusting effect, makes the seat continuously provide the best support feedback feeling according to the different demand states of the user, and comprehensively improves the overall performance of the seat and the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of the utility model;

[0017] Figure 2 is a schematic view of the utility model;

[0018] Figure 3 is a schematic view of the utility model;

[0019] Figure 4 is an enlarged schematic view of part A of the utility model.

[0020] In the figure: 1 - seat base, 2 - seat, 3 - backrest, 4 - adaptive adjustment mechanism, 5 - position locking mechanism, 6 - feedback adjustment mechanism, 7 - backrest connecting rod;

[0021] 101 - arc-shaped groove, 401 - pressing tooth, 402 - following translation, 403 - linkage rod, 501 - locking tooth, 502 - handle, 601 - adjustment sleeve, 602 - elastic member, 603 - adjustment bolt. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0023] Embodiment one:

[0024] In combination Figures 1-4 As shown in a gravity adaptive adjustment mechanism for a chair seat and backrest, mainly composed of multiple key parts in cooperation, the basic structure includes a seat base 1, which is connected to the seat 2 in a rotating manner, and the seat 2 can rotate freely relative to the seat base 1. At the end of the seat base 1, a backrest 3 is also installed in a rotating manner to provide back support for the user. An adaptive adjustment mechanism 4 and a position locking mechanism 5 are provided in the cavity of the seat base 1. The adaptive adjustment mechanism 4 plays a key role and is used to realize the linkage between the seat 2 and the backrest 3. When the user sits on the seat 2 and changes the posture, the adaptive adjustment mechanism 4 can automatically adjust the angle of the seat 2 and the backrest 3 according to the change of gravity, so that they always maintain a coordinated state that meets the ergonomic requirements, providing the best comfort for the user. The position locking mechanism 5 is an important part to ensure the stability of the seat, which can lock the seat 2 and the backrest 3 at any position within the travel range of the adaptive adjustment mechanism 4. This means that after the user adjusts to a comfortable position, the seat can be fixed at this position by the position locking mechanism 5 to prevent the seat from changing the angle further. In addition, a feedback adjustment mechanism 6 is also provided at the bottom of the seat base 1. The feedback adjustment mechanism 6 cooperates with the adaptive adjustment mechanism 4 to adjust the feedback information of the adjustment process of the adaptive adjustment mechanism 4, further optimizing the linkage effect of the seat 2 and the backrest 3, and realizing more precise and intelligent gravity adaptive adjustment function.

[0025] The chair back connecting rod 7 is rotatably arranged in the cavity of the chair back 3, and has good rotation flexibility, so that the chair back connecting rod 7 can still work stably and reliably during long-term and frequent rotation. The other end of the chair back connecting rod 7 is connected to the seat base 1 through a high-precision rotating shaft, so that the chair back connecting rod 7 can rotate very smoothly, reduces the jamming phenomenon, and improves the stability of the whole structure during operation, thereby providing a solid foundation for the normal operation of the gravity self-adaptive adjusting mechanism of the seat 2 and the chair back 3.

[0026] The adaptive adjusting mechanism 4 is the key component of the gravity self-adaptive adjusting system of the seat 2 and the chair back 3, and is composed of a downward pressing tooth piece 401, a follow-up translation piece 402, and a linkage rod 403. The surface of the downward pressing tooth piece 401 is precisely processed to form uniformly distributed teeth. The shape and spacing of the teeth are carefully designed to ensure the accuracy and stability of transmission. When the user sits on the seat 2, the seat 2 generates a downward pressing action due to gravity, and the downward pressing tooth piece 401 will first bear this pressure and convert the vertical pressure into a force in a specific direction. The follow-up translation piece 402 is an important part of the adaptive adjusting mechanism 4 responsible for performing the translation action. It is installed on a specific guide system, which allows the follow-up translation piece 402 to maintain a straight trajectory during movement, effectively avoiding deviation and jamming. The downward pressing tooth piece 401 and the follow-up translation piece 402 are connected by the linkage rod 403, which allows the components to rotate flexibly within a certain angle range, ensuring that the force transmission is not affected by the change in relative motion angle. When the downward pressing tooth piece 401 is driven by gravity to displace, the linkage rod 403 accurately transmits the movement to the follow-up translation piece 402, causing the follow-up translation piece 402 to smoothly translate along the predetermined horizontal direction, and finally realizing the adaptive linkage adjustment between the seat 2 and the chair back 3 according to the change in gravity.

[0027] The end of the follow-up translation piece 402 penetrates the side wall of the seat base 1, and is stably connected with the chair back 3, ensuring that the force can be stably and accurately transmitted during the gravity self-adaptive adjustment of the seat 2 and the chair back 3. An arc-shaped groove 101 is specially provided on the side wall of the seat base 1 to guide the movement of the follow-up translation piece 402. The arc-shaped groove 101 is accurately designed according to the required movement trajectory of the follow-up translation piece 402 in various possible adjustment states of the chair back 3 and the seat 2, thereby improving the adjustment efficiency and sensitivity of the adaptive adjusting mechanism 4 as a whole, and ensuring the long-term stable operation of the whole seat adjusting system.

[0028] The position locking mechanism 5 in this embodiment mainly consists of a locking tooth piece 501 closely matched with the pressing tooth piece 401 and a handle 502 for controlling the rotation of the locking tooth piece 501. The shape and spacing of the teeth of the locking tooth piece 501 are accurately matched with the teeth of the pressing tooth piece 401. When the two are engaged, a strong and stable locking force can be provided to ensure that the pressing tooth piece 401 and the chair seat 2 and the chair back 3 associated therewith are fixed in position and will not change due to the actions of the user or external forces. A handle 502 is specially provided on the locking tooth piece 501 to drive its rotation. The handle 502 has a shape that conforms to the habits of human hands and the surface is treated to prevent slipping, for example, using a frosted process or wrapping a soft and frictional rubber material, so that the user can easily and comfortably operate it. One end of the handle 502 is closely connected to the locking tooth piece 501 through a strong connecting shaft to ensure that when the handle 502 is rotated, the locking tooth piece 501 can be efficiently and stably driven to rotate accordingly. The other end penetrates the seat base 1 and is accurately placed outside the seat base 1, making it convenient for the user to operate the handle 502 outside the seat to control the position locking mechanism 5, thereby locking or unlocking the adjustment position of the chair seat 2 and the chair back 3 at any time according to individual needs.

[0029] The feedback adjusting mechanism 6 in this embodiment is the intelligent sensing and regulating part in the whole chair seat and back gravity self-adaptive adjusting system, and contains multiple key components working in cooperation. One of the core components is the adjusting sleeve 601 sleeved on the bottom of the lower pressing tooth piece 401. The adjusting sleeve 601 cooperates with the bottom of the lower pressing tooth piece 401 in a state of smooth relative movement. An elastic member 602 is carefully arranged in the cavity of the adjusting sleeve 601. The elastic member 602 is generally made of high-quality spring steel. The stiffness coefficient of the spring is accurately calculated and adjusted, aiming to provide appropriate elastic feedback force for the adjusting sleeve 601 according to the change of the gravity borne by the chair seat 2. When the user sits down or changes the sitting posture, the lower pressing tooth piece 401 is forced to move downward, and the elastic member 602 is extruded and deformed. The reverse elastic force generated by the elastic member 602 is transmitted to the lower pressing tooth piece 401 through the adjusting sleeve 601, so as to subtly correct and feedback adjust the action of the self-adaptive adjusting mechanism 4, and ensure that the linkage adjustment of the chair seat 2 and the chair back 3 is always in a comfortable and ergonomic state. At the bottom of the seat base 1, an adjusting bolt 603 is arranged. The end of the adjusting bolt 603 can accurately abut against the adjusting sleeve 601. The user can change the contact position of the end of the adjusting bolt 603 and the adjusting sleeve 601 by rotating the adjusting bolt 603. For example, when it is needed to enhance the feedback force of the elastic member 602, the adjusting bolt 603 can be appropriately tightened to press the adjusting sleeve 601 more powerfully, so as to compress the elastic member 602 and increase the pre-tightening force of the elastic member 602. Conversely, loosening the adjusting bolt 603 can reduce the pre-tightening force of the elastic member 602, so as to meet the individualized needs of different users for the feedback adjusting sensitivity and force of the seat 2, and realize more fine regulation and control of the whole chair seat 2 and chair back 3 gravity self-adaptive adjusting system.

[0030] It is apparent for those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be realized in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be deemed to limit the claims involved.

[0031] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gravity self-adapting adjusting mechanism for a chair seat back, comprising a seat base (1) and a seat (2) in rotational cooperation with the seat base (1), the seat base (1) being provided at an end portion with a backrest (3), characterized in that: The seat base (1) cavity is provided with an adaptive adjusting mechanism (4) and a position locking mechanism (5), the adaptive adjusting mechanism (4) is used for linkage cooperation of the seat (2) and the back (3), the position locking mechanism (5) is used for locking at any position in the stroke of the adaptive adjusting mechanism (4), the seat base (1) bottom is provided with a feedback adjusting mechanism (6), the feedback adjusting mechanism (6) is matched with the adaptive adjusting mechanism (4).

2. A gravity- adaptive adjustment mechanism for a chair seat and backrest according to claim 1, characterized in that: The back (3) cavity is provided with a back connecting rod (7), the other end of the back connecting rod (7) is connected to the seat base (1) through a rotating shaft.

3. A gravity adaptive adjustment mechanism for a chair seat and backrest according to claim 1, characterized in that: The adaptive adjusting mechanism (4) includes a pressing gear (401) and a follow-up translation piece (402), the pressing gear (401) and the follow-up translation piece (402) are matched through a linkage rod (403).

4. A gravity- adaptive adjustment mechanism for a chair seat and backrest according to claim 3, characterized in that: The end of the follow-up translation piece (402) is connected to the seat base (1) through the side wall and the back (3), the seat base (1) side wall is provided with an arc-shaped slot (101) for guiding the movement of the follow-up translation piece (402).

5. A gravity- adaptive adjustment mechanism for a chair seat and backrest according to claim 3, characterized in that: The position locking mechanism (5) includes a locking gear (501) matched with the pressing gear (401), the locking gear (501) is provided with a handle (502) for driving its rotation, the handle (502) penetrates the seat base (1) and is placed outside.

6. A gravity- adaptive adjustment mechanism for a chair seat and backrest according to claim 5, characterized in that: The feedback adjusting mechanism (6) includes an adjusting sleeve (601) sleeved on the bottom of the pressing gear (401), the adjusting sleeve (601) cavity is provided with an elastic element (602), the seat base (1) bottom is provided with an adjusting bolt (603), the end of the adjusting bolt (603) is in contact with the adjusting sleeve (601).

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