Seat and back sliding and waist jacking device thereof

Abstract

The utility model relates to the field of seats, in particular to a seat and a back sliding and waist jacking device thereof. The utility model relates to a back sliding and waist propping device which comprises a sliding base directly or indirectly arranged on a chair back support frame in a sliding manner, and a backrest framework arranged on the sliding base, the waist rest assembly is connected to the sliding base below the backrest framework through a waist jacking mechanism, and an interference component is arranged below the waist jacking mechanism. And in the descending process of the waist jacking mechanism along with the sliding base, an interference component acts on the waist jacking mechanism to enable the waist jacking mechanism to forwards support the waist leaning assembly. According to the scheme, the sliding back and the waist supporting structure are linked, so that the waist is effectively supported while the sliding back is used, and the sitting comfort of the seat is improved.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to a seat and a sliding back and waist supporting device thereof. Background Art

[0002] In existing office chairs, the backrest is usually connected by a backrest and a backrest support frame. The backrest is used to set a mesh or leather cover cloth, and is the component that directly supports the human back; the backrest frame is used to connect the seat chassis and the backrest to effectively fix the backrest. Usually, the backrest and the backrest frame are fixedly connected. In addition, in order to improve comfort, some chairs also have a hinged connection between the backrest and the backrest frame, so that the backrest can rotate relative to the backrest frame. The existing connection method between the backrest and the backrest frame has the following shortcomings: when the user's back is leaning on the backrest, if the user leans back hard, the back of the human body will slide downward relative to the backrest. At the same time, the relative movement between the human body and the backrest will cause the user's clothes to be pulled up, thus causing discomfort.

[0003] In order to solve this technical problem, the Chinese invention patent publication with the publication number "CN116602516A" describes a sliding chair back, including a chair back support frame whose lower end is connected to the tilt tray, and a chair back frame that is longitudinally slidably arranged on the front end of the chair back support frame through a sliding back assembly; the sliding back assembly includes a sliding base; the front end surface of the sliding base is slidably connected to the rear end of the chair back frame, or the rear end surface of the sliding base is slidably connected to the front end of the chair back support frame, and then in order to enable the chair back frame to automatically reset when the external force is removed after relative sliding, it is necessary to provide an elastic reset member that can support the chair back frame upward. The sliding chair back retains the sliding back function of the seat and avoids relative movement between the human body and the chair back. On this basis, this solution further takes into account that the seat using the above-mentioned sliding back assembly will lack effective support for the waist during use, and thus further improves it. Summary of the Invention

[0004] In order to solve the above problems, the first purpose of the present invention is to provide a sliding back and waist support device. This solution links the sliding back with the waist support structure, thereby achieving effective waist support while sliding the back, thereby improving the seat comfort.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A sliding back and lumbar support device includes a sliding base that is directly or indirectly slidably arranged on a chair back support frame, and a backrest frame arranged on the sliding base; it is characterized in that: the lumbar support assembly is connected to the sliding base below the backrest frame through a lumbar support mechanism, and an interference component is arranged below the lumbar support mechanism; when the lumbar support mechanism descends with the sliding base, the interference component acts on the lumbar support mechanism to make the lumbar support mechanism support the lumbar support assembly forward.

[0007] The present invention adopts the above-mentioned technical solution, which relates to a sliding back lumbar support device. The sliding back lumbar support device sets the backrest frame on a sliding base. The sliding base can be directly slidably mounted on the chair back support frame, or it can be indirectly connected to the chair back support frame using a fixed plate as described below. This allows the backrest frame to slide relative to the chair back support frame, thereby preventing relative movement between the human body and the chair back, and improving user comfort.

[0008] On this basis, the sliding base in this solution is equipped with a lumbar support mechanism, which is located below the backrest frame and connected to the lumbar support assembly at the front end. During use, the lumbar support mechanism slides longitudinally with the sliding base. When passing through the interfering member, the lumbar support mechanism is acted upon by the interfering member, causing the lumbar support mechanism to push forward to support the lumbar support assembly. In this way, when the seat reclines, the backrest frame and the sliding base connected to it slide downward relative to the chair back support frame due to the friction of the human back. At this time, the lumbar support mechanism pushes out the lumbar support assembly to support the occupant's waist. In other words, this solution links the sliding back with the lumbar support structure, thereby achieving effective lumbar support while sliding back, improving seat comfort.

[0009] In a specific embodiment, it also includes a fixed plate for fixing to the chair back support frame, and the sliding base is slidably set up and down on the fixed plate; the end of the fixed plate extending downward to the bottom of the lumbar support mechanism is constructed with an interference member, or an interference member is set on the chair back support frame below the lumbar support mechanism. In this solution, the fixed plate is used as an installation transition piece between the chair back support frame and the chair back frame, and the sliding base is slidably set up and down on the fixed plate. In this way, the sliding back lumbar support device assembled by the fixed plate and the sliding base can be pre-assembled at the factory, and the user only needs to assemble the sliding back lumbar support device and the chair back support frame. The provision of the fixed plate allows the backrest frame, lumbar support assembly and chair back frame to be packed separately, thereby saving packaging and storage packing space and reducing transportation costs.

[0010] Furthermore, the sliding base and the backrest support frame or fixed plate to which it is slidably connected are connected via a first elastic return element. The elastic deformation direction of the first elastic return element is arranged along the sliding direction of the sliding base, and the elastic force of the first elastic return element supports or pulls the sliding base upward. The first elastic return element is provided in this solution to ensure that the backrest frame can automatically return to its original position after relative sliding and the removal of external force.

[0011] Furthermore, in order to improve the smoothness of the sliding base sliding up and down, rollers or balls are rolled on the seat back support frame or the fixed plate, and the sliding base rolls relative to the seat back support frame or the fixed plate based on the rollers or balls.

[0012] In a specific embodiment, the waist-supporting mechanism is constructed as a scissor frame fixed to a sliding base, the scissor frame including a fixed platform, a movable platform, and a scissor assembly disposed between the fixed and movable platforms; the waist support assembly is disposed on the movable platform of the scissor frame; the interference member is constructed as a block on the downward path of the movable end of one of the scissor arms of the scissor assembly; when the waist-supporting mechanism descends with the sliding base, the block reacts on the end of the scissor arm of the scissor frame, driving the scissor frame to expand and prop up the waist support assembly. In this solution, the waist-supporting mechanism is configured as a scissor frame. When the sliding base descends, the block blocks the end of the scissor arm of the scissor frame, thereby causing the scissor frame to expand and push the movable platform and the waist support assembly thereon forward.

[0013] Furthermore, the scissor assembly includes an inner scissor arm and an outer scissor arm, each hinged at its center. The outer scissor arm is located outside the edges of the fixed and movable platforms, with a first end hinged to the movable platform and a second end slidably mounted on the fixed platform and rotatable about the sliding axis. The interference member is constructed as a stopper on the downward path of the second end of the outer scissor arm. In this solution, the outer scissor arm is located outside the fixed and movable platforms, and the stopper is located on the downward path of the second end of the outer scissor arm, so it will not interfere with the downward movement of the fixed and movable platforms.

[0014] In a specific embodiment, the outer scissor arms are two, located on either side of the fixed platform and the movable platform, and connected by a connecting rod. The interference member is constructed as two blocks, and the lower end of the sliding base and the scissor frame thereon slide between the two blocks. In this way, when the sliding base and the scissor frame thereon slide downward between the two blocks, the outer scissor arms on both sides can be simultaneously acted upon by the two blocks, ensuring that the scissor assembly is stably opened.

[0015] In a further solution, the waist support mechanism is further provided with a second elastic reset member that drives the scissors frame to retract; the second elastic reset member is used to drive the scissors frame to retract, that is, to drive the waist support assembly to return to its original position, so that it can automatically reset when the external force is removed. Specifically, the following solutions can be adopted: Solution 1 is that the second elastic reset member is constructed as a tension spring, and the two ends of the tension spring are respectively connected to the fixed platform and movable platform of the scissors frame. Solution 2 is that the outer end of the tension spring is connected to the fixed platform or the movable platform, and the inner end is connected to the end of one of the scissors arms. The elastic force of the tension spring is used to push the scissors arms outward.

[0016] Preferably, the lumbar support assembly includes a lumbar support adjustment seat and a lumbar support body. The lumbar support adjustment seat is disposed on the movable platform of the scissor frame, and the rear end of the lumbar support body is longitudinally slidably mounted on the lumbar support adjustment seat. In this embodiment, the lumbar support assembly utilizes the lumbar support adjustment seat and the lumbar support body to achieve lumbar support height adjustment. For details, please refer to the lumbar support sliding adjustment device described in Chinese Utility Model Patent Publication No. "CN220174783U."

[0017] The second object of the present invention is to provide a chair, characterized by comprising the sliding back and waist supporting device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the lumbar support on the sliding back lumbar support device in the un-ejected state.

[0019] Figure 2 It is a schematic diagram of the side structure of the sliding back waist support device.

[0020] Figure 3 This is a schematic diagram of the lumbar support on the sliding back lumbar support device in the ejected state.

[0021] Figure 4 Schematic diagram of the explosion structure of the sliding back and waist device Figure 1 .

[0022] Figure 5 Schematic diagram of the explosion structure of the sliding back and waist device Figure 2 .

[0023] Figure 6 This is a schematic diagram of the structure of the sliding back lumbar support device with the backrest frame and lumbar support assembly omitted.

[0024] Figure 7 It is a structural diagram of the top waist mechanism. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0028] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] Example 1:

[0031] like Figures 1 to 7As shown, this embodiment relates to a sliding back lumbar support device, comprising a sliding base 3 that slides directly or indirectly on a backrest support frame 1, and a backrest frame 2 mounted on the sliding base 3. The sliding back lumbar support device mounts the backrest frame 2 on the sliding base 3. The sliding base 3 can slide directly on the backrest support frame 1, or it can be indirectly connected to the backrest support frame 1 using a fixed plate as described below. This allows the backrest frame 2 to slide relative to the backrest support frame 1, thereby preventing relative movement between the human body and the chair back, and improving user comfort.

[0032] On this basis, the lumbar support assembly 6 in this solution is connected to the sliding base 3 below the backrest frame 2 via a lumbar support mechanism 5. An interference member 7 is located below the lumbar support mechanism 5. As the lumbar support mechanism 5 descends with the sliding base 3, the interference member 7 acts on the lumbar support mechanism 5, causing it to propel the lumbar support assembly 6 forward. In this solution, the lumbar support mechanism 5 is located on the sliding base 3, below the backrest frame 2 and connected to the lumbar support assembly 6 at its front end. During use, the lumbar support mechanism 5 slides longitudinally with the sliding base 3. As it passes by the interference member 7, it is acted upon by the interference member 7, causing it to propel the lumbar support assembly 6 forward. Thus, when the seat reclines, the backrest frame 2 and its connected sliding base 3 slide downward relative to the backrest support frame 1 due to friction from the back. At this point, the lumbar support mechanism 5 pushes the lumbar support assembly 6 outward to support the occupant's waist. This solution effectively links the sliding and lumbar support mechanisms, providing effective lumbar support during both sliding and resting, enhancing seating comfort.

[0033] exist Figure 4 and 5 The specific implementation scheme shown also includes a fixed plate 4 for fixing to the chair back support frame 1, and the sliding base 3 is set on the fixed plate 4 for sliding up and down. The fixed plate 4 extends downward to the end below the lumbar support mechanism 5, and an interference member 7 is constructed on the end, or an interference member 7 is set on the chair back support frame 1 below the lumbar support mechanism 5. In the scheme here, the fixed plate 4 is used as an installation transition piece between the chair back support frame 1 and the chair back frame, and the sliding base 3 is set on the fixed plate 4 for sliding up and down. In this way, the sliding back lumbar support device assembled by the fixed plate 4 and the sliding base 3 can be pre-assembled at the factory, and the user only needs to assemble the sliding back lumbar support device and the chair back support frame 1. By providing the fixed plate 4, the backrest frame 2, the lumbar support assembly 6 and the chair back frame can be packed separately, thereby saving packaging and storage packing space and reducing transportation costs.

[0034] Furthermore, the sliding base 3 is connected to the backrest support frame 1 or fixed plate 4 to which it is slidably connected via a first elastic reset member 31. The elastic deformation direction of the first elastic reset member 31 is set along the sliding direction of the sliding base 3, and the elastic force of the first elastic reset member 31 supports or pulls the sliding base 3 upward. The first elastic reset member 31 is provided in this solution so that the backrest frame 2 can automatically reset when the external force is removed after relative sliding. The first elastic reset member 31 shown in the figure is a tension spring, the upper end of which is connected to the backrest support frame 1 or fixed plate 4, and the lower end is connected to the sliding base 3; the elastic force of the tension spring is used to pull the sliding base 3 upward. In addition, to improve the smoothness of the sliding base 3's up and down sliding, a roller 32 or ball bearing is provided on the backrest support frame 1 or fixed plate 4, and the sliding base 3 rolls relative to the backrest support frame 1 or fixed plate 4 based on the roller 32 or ball bearing.

[0035] In such Figures 1 to 3 , in the specific embodiments shown in 6 and 7, the waist-supporting mechanism 5 is constructed as a scissors frame fixed to the sliding base 3, and the scissors frame includes a fixed platform 51, a movable platform 52, and a scissors assembly arranged between the fixed platform 51 and the movable platform 52. The waist support assembly 6 is arranged on the movable platform 52 of the scissors frame. The interference member 7 is constructed as a block on the downward path of the moving end of one of the scissors arms of the scissors assembly. When the waist-supporting mechanism 5 descends with the sliding base 3, the block reacts on the end of the scissors arm of the scissors frame, driving the scissors frame to expand and support the waist support assembly 6 forward. In the scheme here, the waist-supporting mechanism 5 is set as a scissors frame. When the sliding base 3 descends, the block blocks the end of the scissors arm of the scissors frame, so that the scissors frame is expanded, and the movable platform 52 and the waist support assembly 6 thereon are pushed forward.

[0036] Furthermore, the scissor assembly includes an inner scissor arm 53 and an outer scissor arm 54 that are mutually hinged in the middle. The outer scissor arm 54 is located outside the edge of the fixed platform 51 and the movable platform 52. The first end 541 of the outer scissor arm 54 is hinged on the movable platform 52, and the second end 542 is slidably set on the fixed platform 51 and can rotate about the sliding axis. The interference member 7 is constructed as a stopper on the downward path of the second end 542 of the outer scissor arm 54. In the scheme here, the outer scissor arm 54 is on the outside of the fixed platform 51 and the movable platform 52, and the stopper is set on the downward path of the second end 542 of the outer scissor arm 54, so it will not interfere with the downward movement of the fixed platform 51 and the movable platform 52.

[0037] In this specific embodiment, there are two external scissor arms 54, one on each side of the fixed platform 51 and the other on the movable platform 52, connected by a connecting rod 55. The interference member 7 is constructed as two blocks, and the lower end of the sliding base 3 and the scissor frame thereon slide between the two blocks. As a result, when the sliding base 3 and the scissor frame thereon slide downward between the two blocks, the external scissor arms 54 on both sides can be simultaneously acted upon by the two blocks, ensuring the stable expansion of the scissor assembly.

[0038] In a further solution, the waist support mechanism 5 is further provided with a second elastic reset member 56 for driving the scissors frame to retract. The second elastic reset member 56 is used to drive the scissors frame to retract, that is, to drive the waist support assembly 6 to return to its position backward, so that it can automatically reset when the external force is removed. Specifically, the following solutions can be adopted: Solution 1 is as follows: Figure 6 and 7 In the illustrated embodiment, the second elastic return member 56 is constructed as a tension spring, with its ends connected to the fixed platform 51 and the movable platform 52 of the scissor frame, respectively. In the second embodiment, the outer end of the tension spring is connected to the fixed platform 51 or the movable platform 52, and the inner end is connected to the end of one of the scissor arms. The elastic force of the tension spring is used to open the scissor arms outward.

[0039] Finally, the lumbar support assembly 6 includes a lumbar support adjustment seat 61 and a lumbar support body 62. The lumbar support adjustment seat 61 is mounted on the movable platform 52 of the scissor frame, and the rear end of the lumbar support body 62 is longitudinally slidably mounted on the lumbar support adjustment seat 61. In this embodiment, the lumbar support assembly 6 utilizes the lumbar support adjustment seat 61 and the lumbar support body 62 to achieve adjustable lumbar support height. For details, please refer to the lumbar support sliding adjustment device described in Chinese Utility Model Patent Publication No. "CN220174783U."

[0040] Example 2:

[0041] The second object of the present invention is to provide a chair comprising the sliding back and waist supporting device as described in Example 1.

[0042] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A sliding back support device, comprising a sliding base (3) directly or indirectly slidably mounted on a chair back support frame (1), and a backrest frame (2) mounted on the sliding base (3); characterized in that: The lumbar support assembly (6) is connected to the sliding base (3) below the backrest frame (2) through a lumbar support mechanism (5), and an interference member (7) is provided below the lumbar support mechanism (5); when the lumbar support mechanism (5) moves downward along with the sliding base (3), the interference member (7) acts on the lumbar support mechanism (5) so that the lumbar support mechanism (5) supports the lumbar support assembly (6) forward.

2. A sliding back support device according to claim 1, characterized in that: It also includes a fixing plate (4) for fixing to the chair back support frame (1), and the sliding base (3) is slidably arranged on the fixing plate (4) up and down; the fixing plate (4) extends downward to the end below the lumbar support mechanism (5) and is constructed with an interference member (7).

3. A sliding back support device according to claim 1 or 2, characterized in that: The sliding base (3) and the chair back support frame (1) or the fixed plate (4) to which it is slidably connected are connected via a first elastic reset member (31); the elastic deformation direction of the first elastic reset member (31) is set along the sliding direction of the sliding base (3); and the elastic force of the first elastic reset member (31) supports or pulls the sliding base (3) upward.

4. A sliding back support device according to claim 1 or 2, characterized in that: A roller (32) or a ball is provided on the chair back support frame (1) or the fixed plate (4) for rolling, and the sliding base (3) is subjected to rolling friction relative to the chair back support frame (1) or the fixed plate (4) based on the roller (32) or the ball.

5. A sliding back support device according to claim 1 or 2, characterized in that: The waist-supporting mechanism (5) is constructed as a scissor frame fixed on the sliding base (3), and the scissor frame includes a fixed platform (51), a movable platform (52), and a scissor assembly arranged between the fixed platform (51) and the movable platform (52); the waist support assembly (6) is arranged on the movable platform (52) of the scissor frame; the interference member (7) is constructed as a stopper on the downward path of the moving end of one of the scissor arms of the scissor assembly; when the waist-supporting mechanism (5) descends with the sliding base (3), the stopper reacts to the end of the scissor arm of the scissor frame, driving the scissor frame to expand and support the waist support assembly (6) forward.

6. The sliding back support device according to claim 5, characterized in that: The scissor fork assembly comprises an inner scissor fork arm (53) and an outer scissor fork arm (54) which are mutually hinged in the middle; the outer scissor fork arm (54) is located outside the edges of the fixed platform (51) and the movable platform (52); the first end (541) of the outer scissor fork arm (54) is hinged to the movable platform (52), and the second end (542) is slidably arranged on the fixed platform (51) and can rotate about the sliding axis; the interference member (7) is constructed as a stopper on the downward path of the second end (542) of the outer scissor fork arm (54).

7. The sliding back support device according to claim 6, characterized in that: There are two outer scissor arms (54), which are respectively located on both sides of the fixed platform (51) and the movable platform (52) and are connected by a connecting rod (55); the interference member (7) is constructed as two blocks, and the lower end of the sliding base (3) and the scissor frame thereon are slidably arranged between the two blocks.

8. The sliding back support device according to claim 5, characterized in that: The waist-supporting mechanism (5) is also provided with a second elastic reset member (56) for driving the scissors frame to retract; the second elastic reset member (56) is constructed as a tension spring, and the two ends of the tension spring are respectively connected to the fixed platform (51) and the movable platform (52) of the scissors frame; or the outer end of the tension spring is connected to the fixed platform (51) or the movable platform (52), and the inner end is connected to the end of one of the scissors arms, and the elastic force of the tension spring is used to push the scissors arms outward.

9. The sliding back support device according to claim 5, characterized in that: The lumbar support assembly (6) comprises a lumbar support adjustment seat (61) and a lumbar support body (62). The lumbar support adjustment seat (61) is arranged on a movable platform (52) of the scissor frame, and the rear end of the lumbar support body (62) is longitudinally slidably arranged on the lumbar support adjustment seat (61).

10. A chair, characterized in that: The invention comprises the sliding back supporting waist device according to any one of claims 1 to 9.

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