A structure for synchronous lifting and chasing

Abstract

The present invention relates to a synchronous lifting and chasing back structure, which relates to the field of seats. It includes: a base; a seat arranged on the base; a backrest arranged on the seat; a one-button lifter is arranged between the base and the seat, the one-button lifter is provided with a switch, and the lifting and lowering of the seat can be controlled by the switch and the lifting process can be stopped at any time; a linkage mechanism is arranged at the back of the backrest, the linkage mechanism is pivotally connected to the seat and the base, the backrest is supported behind the seat by the linkage mechanism and can be synchronously moved longitudinally forward or backward relative to the seat during the lifting and lowering process of the seat by the linkage mechanism. The present invention combines the one-button lifter with the linkage mechanism, so that the synchronous lifting and chasing back structure can synchronously adjust the height and seat depth of the seat through the operating lever when the user is sitting on the seat. This is very convenient and avoids the tediousness of adjusting the height and seat depth separately, and there is no need to repeatedly adjust the height and seat depth.

Description

Technical Field

[0001] The invention discloses a synchronous lifting and chasing back structure, which relates to the field of seats. Background Art

[0002] A chair typically consists of a seat and a backrest. Generally, the seat height is adjustable, but the seat depth is fixed. However, this design presents a problem: children of different ages have different body shapes. For younger children, the seat height should be lower to allow their feet to touch the ground, while the seat depth should also be shallow to allow their back to rest against the backrest. However, for older children, the seat height should be higher and deeper.

[0003] Therefore, a seat that has both seat height adjustment and seat depth adjustment functions is a good seat suitable for children of different ages. Such a seat can grow with the child and be used for a long time.

[0004] In response to this demand, an existing patent document has disclosed a chair with adjustable seat depth. The publication number of the patent document is CN204635607U. In the specification of the patent document, paragraphs 0005 to 0007 disclose the following solution: "A chair with adjustable seat depth, comprising a backrest support part, a seat cushion support part and a bottom support part; further comprising an axis movement system that can move the backrest support part and the seat cushion support part relative to the bottom support part; the axis movement system functionally includes a first axis system that allows the backrest support part to move along the direction of the upper extension of the lumbar curve of the human spine, and a second axis system that allows the seat cushion support part to move along the direction of the lower extension of the lumbar curve of the human spine and / or along the length direction of the thigh part of the human body when sitting." That is, this solution is to adjust the height and seat depth by allowing the seat cushion support part and the backrest support part to move along two axis systems. However, because they move in one direction, they are equipped with locking devices to fix the position after movement. Therefore, for the user, there must be an unlocking operation before adjustment, which makes the solution too cumbersome, and the seat depth and height must be adjusted separately, which increases the cumbersomeness. Usually, the user needs to sit on the seat to experience the appropriate seat depth and height, so one adjustment cannot directly adjust to the appropriate seat depth and height. Therefore, the repeated adjustment process makes the cumbersomeness problem more serious. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a synchronous lifting and chasing structure.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A synchronous lifting and chasing structure, comprising:

[0008] base;

[0009] a seat set on a base;

[0010] a backrest provided on a seat;

[0011] It is characterized in that a one-button lifter is provided between the base and the seat, and the one-button lifter is provided with a switch, by which the lifting of the seat can be controlled and the lifting process can be stopped at any time; and

[0012] A linkage mechanism is provided on the back of the backrest, the linkage mechanism being pivotally connected to the seat and the base. The backrest is supported behind the seat through the linkage mechanism and can be synchronously moved longitudinally forward or backward relative to the seat through the linkage mechanism during the process of raising and lowering the seat.

[0013] Furthermore, the one-button lifter includes a pneumatic rod and a chassis, the pneumatic rod is fixed on the base, the chassis is sleeved on the lifting shaft of the pneumatic rod and is fixed under the seat, and an operating rod is provided on the chassis as a switch for the one-button lifter.

[0014] Furthermore, the operating rod extends outward from the chassis.

[0015] Furthermore, the linkage mechanism includes a fixed frame fixed under the seat, the fixed frame extends to the rear of the seat, and the linkage mechanism also includes a support frame for supporting the backrest, the tail end of the support frame is provided with a first pivot point, and the support frame is provided with a second pivot point extending outward adjacent to the tail end, the second pivot point is pivotally connected to the protruding end of the fixed frame, and a pull rod is provided between the first pivot point and the base, and the two ends of the pull rod are respectively pivotally connected to the first pivot point and the base; when the seat is raised or lowered, the fixed frame under the seat will pull the support frame, and through the constraint of the pull rod, the support frame gradually rotates forward or backward to move the backrest.

[0016] Optionally, a backrest holding mechanism is provided, which can ensure that the angle between the backrest and the seat remains unchanged during the rotation of the support frame.

[0017] Furthermore, the backrest holding mechanism includes a remote rod, one end of which is pivotally connected to the top of the supporting frame, and the other end is fixed to the back of the backrest. A top rod is provided between the remote rod and the fixed frame, and both ends of the top rod are pivotally connected to the remote rod and the fixed frame respectively. The top rod can drive the remote rod to rotate in the opposite direction when the supporting frame rotates, so that the angle between the backrest and the seat always remains unchanged.

[0018] Optionally, the pull rod is a length-variable structure.

[0019] Furthermore, the pull rod is a gas spring.

[0020] Beneficial effects:

[0021] 1. The present invention combines a one-button operation lifter with a linkage mechanism, so that the synchronous lifting and chasing back structure can synchronously adjust the height and seat depth of the seat through the operating lever when the user is sitting on the seat. When the appropriate seat depth and / or height is reached, the operating lever can be immediately released, so that the height and seat depth are fixed. This structure is very convenient because it is a one-button operation, and avoids the tediousness of adjusting the height and seat depth separately, and there is no need to repeatedly adjust the height and seat depth. This is the outstanding contribution made by the present invention compared with the prior art.

[0022] 2. The present invention also includes a backrest retention mechanism that maintains the angle between the backrest and seat during rotation of the support frame. This mechanism eliminates the need for seat depth adjustment limited by the backrest angle. Its greatest advantage is that the backrest consistently conforms to the human spine, providing excellent back support.

[0023] 3. The present invention optimizes the fixed-length pull rod in the linkage mechanism to a variable-length pull rod. By changing the length of the pull rod, the support frame can be driven to rotate, thereby independently moving the backrest and adjusting the seat depth, making the chair more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the maximum seat height when the backrest cannot be adjusted individually;

[0025] Figure 2 This is a schematic diagram of the lowest seat height where the backrest cannot be adjusted individually;

[0026] Figure 3 This is an exploded view of the synchronous lifting and chasing structure;

[0027] Figure 4 This is a schematic diagram of the maximum seating depth when the backrest can be adjusted individually via a pull rod;

[0028] Figure 5 This is a schematic diagram of the minimum seating depth when the backrest can be adjusted individually by the pull rod;

[0029] Description of reference numerals:

[0030] Base 100, seat 200, backrest 300, one-button lifter 400, gas pressure rod 401, chassis 402, operating rod 403, linkage mechanism 500, fixed frame 501, support frame 502, first pivot point 5021, pull rod 503, second pivot point 5022, backrest holding mechanism 600, remote control rod 601, and push rod 602. DETAILED DESCRIPTION

[0031] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1 、 Figure 3As shown, the synchronous lifting and chasing back structure includes a base 100, on which is mounted a one-touch operation lifter 400. A seat 200 is mounted on top of the one-touch operation lifter 400. The seat 200 can be raised and lowered relative to the base 100 by the one-touch operation lifter 400. The one-touch operation lifter 400 is provided with a switch, which can be used to control the raising and lowering of the seat 200 and stop the raising and lowering process at any time. In this embodiment, the one-touch operation lifter 400 uses a pneumatic rod 401 commonly used in seats and a matching chassis 402. The chassis 402 can be mounted on the lifting shaft of the pneumatic rod 401 and can be fixed below the seat 200. The chassis 402 is provided with an operating rod 403 as a switch for the one-touch operation lifter 400. The pneumatic rod 401 has the following characteristics: when the operating rod 403 is pulled to open the valve switch on the lifting shaft, the user sitting on the seat 200 applies pressure to the lifting shaft, and the lifting shaft can slowly descend. If there is no external force acting on the lifting shaft, the lifting shaft can quickly rebound to the highest point. When the operating rod 403 is released, the lifting shaft cannot move. The biggest advantage of using this one-button operation lifter 400 is that it is easy to operate, and the user can sit on the seat 200. When the lifting shaft reaches a suitable height during the slow descent, the operating rod 403 can be immediately released, so that the lifting shaft cannot move, thereby fixing the height. Of course, other implementations of the one-button operation lifter 400, such as electric poles and hydraulic poles, can also achieve the above functions.

[0036] In this embodiment, the operating rod 403 extends outward from the chassis 402 and is designed to be easily touched by a user sitting on the seat 200. Of course, in addition to lever switches such as the operating rod 403, a wire-controlled switch or an electric-controlled switch can also be used.

[0037] In this embodiment, Figure 1 、 Figure 3 As shown, the synchronous lifting and chasing back structure includes a backrest 300 linked to the seat 200, and a linkage mechanism 500 is provided on the back of the backrest 300. The linkage mechanism 500 is pivotally connected to the seat 200 and the base 100. The backrest 300 is supported behind the seat 200 through the linkage mechanism 500 and can be synchronously moved forward or backward along the longitudinal direction during the lifting and lowering process of the seat 200 through the linkage mechanism 500, thereby changing the seat depth of the seat 200. The combination of the one-button operation lifter 400 and the linkage mechanism 500 enables the synchronous lifting and chasing back structure to synchronously adjust the height and seat depth of the seat 200 through the operating rod 403 when the user sits on the seat 200. When the appropriate seat depth and / or height is reached, the operating rod 403 can be immediately released, so that the height and seat depth are fixed. This structure is very convenient because it is a one-button operation, and avoids the tediousness of adjusting the height and seat depth separately, and there is no need to repeatedly adjust the height and seat depth. This is the outstanding contribution made by the present invention compared with the prior art.

[0038] Specifically, such as Figure 1 、 Figure 3 As shown, the linkage mechanism 500 includes a fixed frame 501 fixed below the seat 200. In this embodiment, the fixed frame 501 is fixed to the chassis 402 and extends to the rear of the seat 200. The linkage mechanism 500 also includes a support frame 502 for supporting the backrest 300. The tail end of the support frame 502 is provided with a first pivot point 5021. The support frame 502 is provided with a second pivot point 5022 extending outward near the tail end. The second pivot point 5022 is pivotally connected to the extended end of the fixed frame 501. A pull rod 503 is provided between the first pivot point 5021 and the base 100. The two ends of the pull rod 503 are pivotally connected to the first pivot point 5021 and the base 100 respectively. Figure 1 and Figure 2 As can be seen, when the seat 200 is lowered, the fixed frame 501 below the seat 200 pulls the support frame 502, and through the constraint of the pull rod 503, the support frame 502 gradually rotates forward, thereby moving the backrest 300 and reducing the seat depth. Conversely, when the seat is raised, the support frame 502 and the pull rod 503 cooperate to move the backrest 300, increasing the seat depth.

[0039] If the above mechanism is used, the backrest 300 moves by rotating the support frame 502. While this can change the seat depth, the angle between the backrest 300 and the seat 200 will also change continuously during this process. The angle of the backrest 300 will gradually increase as the seat depth increases, and will gradually decrease as the seat depth decreases. The angle between the backrest 300 and the seat 200 is typically set based on the shape of the human spine, typically between 100 and 120 degrees. Therefore, if the above mechanism is used, the seat depth adjustment range must be greatly limited due to the limited angle.

[0040] Therefore, in this embodiment, a backrest holding mechanism 600 is further provided. The backrest holding mechanism 600 can ensure that the angle between the backrest 300 and the seat 200 remains unchanged during the rotation of the support frame 502. The backrest holding mechanism 600 includes a remote control rod 601, one end of which is pivotally connected to the top of the support frame 502 and the other end is fixed to the back of the backrest 300. A top rod 602 is provided between the remote control rod 601 and the fixed frame 501. The two ends of the top rod 602 are respectively pivotally connected to the remote control rod 601 and the fixed frame 501. The top rod 602 can drive the remote control rod 601 to rotate in the opposite direction when the support frame 502 rotates, thereby ensuring that the angle between the backrest 300 and the seat 200 remains unchanged (refer to FIG. 1 ). Figure 1 and Figure 2). By setting the backrest holding mechanism 600, the adjustment range of the seat depth is no longer limited by the angle of the backrest 300. And the biggest advantage is that the backrest 300 always fits the shape of the human spine and provides good support for the back. Figure 1-2 , attached Figure 4-5 Although the middle backrest 300 is approximately at a 90-degree angle to the seat 200 , in actual products, the front side of the backrest 300 is provided with a curved cushion arranged according to the shape of the human spine.

[0041] This embodiment takes into account that in some cases, the leg growth rate and the upper body growth rate are inconsistent. However, since the backrest 300 and the seat 200 of the present invention are synchronized, the seat may still not be suitable for the user after adjustment. For example, if the legs grow very quickly over a period of time, but the upper body does not change much, after the seat 200 is raised a certain distance, the backrest 300 will also move back a certain distance, increasing the seat depth. This will make it difficult for the user's back to rest against the backrest 300. Therefore, the backrest 300 needs to have an independent adjustment function based on this.

[0042] Based on this, refer to Figure 3 In this embodiment, the fixed-length pull rod 503 is optimized to a variable-length pull rod 503. The pull rod 503 can be directly an electric pole, a gas pole, etc. The implementation method provided in this embodiment is to use a controllable and lockable gas spring. The gas spring has the advantages of being easy to operate and can stop the stroke at any position without the need for electricity. Under normal circumstances, the length of the pull rod 503 or the gas spring is fixed, and the backrest 300 and the seat 200 keep moving synchronously. If necessary, the pull rod 503 or the gas spring can be extended and retracted to change the length to drive the support frame 502 to rotate so that the backrest 300 moves separately to adjust the seat depth (refer to Figure 4 and Figure 5 ).

[0043] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A synchronous lifting and chasing structure, comprising: base(100); A chair seat (200) disposed on the base (100); A backrest (300) provided on the seat (200); The invention is characterized in that a one-button operation lifter (400) is provided between the base (100) and the seat (200), and the one-button operation lifter (400) is provided with a switch, and the lifting of the seat (200) is controlled by the switch and the lifting process can be stopped at any time; as well as A linkage mechanism (500) is provided on the back of the backrest (300), the linkage mechanism (500) being pivotally connected to the seat (200) and the base (100), the backrest (300) being supported behind the seat (200) via the linkage mechanism (500) and being able to synchronously move longitudinally forward or backward relative to the seat (200) during the process of raising and lowering the seat (200) via the linkage mechanism (500); The one-button operation lifter (400) comprises a gas pressure rod (401) and a chassis (402), wherein the gas pressure rod (401) is fixed on the base (100), and the chassis (402) is sleeved on the lifting shaft of the gas pressure rod (401) and fixed below the seat (200), and an operating rod (403) is provided on the chassis (402) as a switch for the one-button operation lifter (400); The linkage mechanism (500) includes a fixed frame (501) fixed below the seat (200), the fixed frame (501) extending toward the rear of the seat (200), and the linkage mechanism (500) further includes a support frame (502) for supporting the backrest (300), the rear end of the support frame (502) is provided with a first pivot point (5021), and the support frame (502) is provided with a second pivot point (5022) extending outward near the rear end, and the second pivot point (5022) is connected to the fixed frame. The extended end of (501) is pivotally connected, and a pull rod (503) is provided between the first pivot point (5021) and the base (100), and the two ends of the pull rod (503) are pivotally connected to the first pivot point (5021) and the base (100) respectively; when the seat (200) is raised or lowered, the fixed frame (501) below the seat (200) pulls the supporting frame (502), and through the constraint of the pull rod (503), the supporting frame (502) is gradually rotated forward or backward, thereby moving the backrest (300); A backrest holding mechanism (600) is provided, and the backrest holding mechanism (600) can ensure that the angle between the backrest (300) and the seat (200) remains unchanged during the rotation of the support frame (502).

2. The synchronous lifting and chasing structure according to claim 1, characterized in that: The operating rod (403) extends outward from the chassis (402).

3. The synchronous lifting and chasing structure according to claim 1, characterized in that: The backrest holding mechanism (600) includes a remote rod (601), one end of the remote rod (601) is pivotally connected to the top of the support frame (502), and the other end is fixed to the back of the backrest (300). A push rod (602) is provided between the remote rod (601) and the fixed frame (501), and the two ends of the push rod (602) are pivotally connected to the remote rod (601) and the fixed frame (501), respectively. When the support frame (502) rotates, the push rod (602) drives the remote rod (601) to rotate in the opposite direction, so that the angle between the backrest (300) and the seat (200) always remains unchanged.

4. The synchronous lifting and chasing structure according to claim 1, characterized in that: The pull rod (503) is a length-variable structure.

5. The synchronous lifting and chasing structure according to claim 4, characterized in that: The pull rod (503) is a gas spring.

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