Back supporting device and seat

Abstract

The back supporting device comprises a back support, a backrest and an adjusting assembly, the backrest is arranged on the front side of the back support and comprises a waist supporting part and a back supporting part which are connected with each other, the upper end of the back supporting part is connected to the upper portion of the back support, and the lower end of the back supporting part is connected to the lower portion of the back support. The lower end of the waist supporting part is connected to the lower portion of the back support through an adjusting assembly. The adjusting assembly comprises a fixing cylinder, a telescopic sleeve and a buckle, the telescopic sleeve is connected to the rear side of the back supporting part and provided with a containing cavity, the buckle is connected to the telescopic sleeve and located in the containing cavity, the fixing cylinder is rotationally connected to the front side of the back support and extends into the containing cavity, and a plurality of gear grooves are formed in the side wall, facing the buckle, of the fixing cylinder. The buckling piece is clamped into the gear groove; when the waist supporting part moves back and forth, the waist supporting part can drive the lower end of the back supporting part to move back and forth and drive the telescopic sleeve and the buckle part to move back and forth, and the buckle part can be clamped into the gear grooves in different positions when moving back and forth.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sitting device technical field, especially a back supporting device and a seat. BACKGROUND

[0002] The structure of the seat comprises a cushion, a backrest and an armrest and a waist rest, the waist rest can provide support for the human waist, and the comfort can be improved better, in the related art, the waist rest of part of the seat can be adjusted forward and backward relative to the backrest, but when the waist rest is adjusted forward, the excessive face difference between the waist rest and the backrest is large, so that the backrest cannot be better fitted to the back of the user, and the user experience is affected. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art is solved, for this, the utility model provides a back supporting device, can realize the cooperation of waist support part and back supporting part.

[0004] Secondly, the utility model further provides a seat using the above-mentioned back supporting device.

[0005] According to the back supporting device provided by the first aspect of the utility model, comprising:

[0006] Back support frame;

[0007] Backrest, located on the front side of the back support frame, the backrest comprises a forwardly extending waist support part and a backwardly extending back support part, the upper end of the waist support part is connected with the lower end of the back support part, the upper end of the back support part is connected to the upper part of the back support frame, and the lower end of the waist support part is connected to the lower part of the back support frame through an adjusting assembly;

[0008] The adjusting assembly comprises a fixed cylinder, a telescopic sleeve and a buckle, the telescopic sleeve is connected to the back side of the back support part and has a receiving cavity, the buckle is connected to the telescopic sleeve and located in the receiving cavity, the fixed cylinder is rotationally connected to the front side of the back support frame and extends into the receiving cavity, the side wall of the fixed cylinder towards the buckle is provided with a plurality of gear grooves arranged in the front-back direction, and the buckle is clamped into the gear grooves.

[0009] When the waist support part moves forward and backward, the waist support part can drive the lower end of the back support part to move forward and backward, and drive the telescopic sleeve and the buckle to move forward and backward, and the buckle can be clamped into the gear grooves at different positions when moving forward and backward.

[0010] The back support device provided according to the first aspect of this utility model has at least the following beneficial effects: When the user pulls the lumbar support part back and forth, not only does the position of the lumbar support part itself change, but it also drives the lower end of the back support part to move back and forth accordingly. This significantly reduces the drop difference between the transition surface of the lumbar support part and the back support part, allowing the backrest to better fit the user's back, thereby effectively improving the user experience and allowing the user to enjoy a more comfortable and fitting back support effect when using the chair. At the same time, the setting of the telescopic sleeve and the buckle, together with the multiple slots on the fixing cylinder, makes the adjustment position of the lumbar support part more precise and stable. The user can adjust the lumbar support part to the most suitable position according to their own needs and fix it firmly, further improving the comfort and practicality of the chair.

[0011] According to the back support device provided in the first aspect embodiment of the present utility model, the adjustment component further includes a load-bearing rib, one end of which is connected to the telescopic sleeve, and the other end is bent upward and extended in contact with the rear side of the waist support and the back support, and then rotatably connected to the upper part of the back bracket.

[0012] According to the back support device provided in the first aspect of the present invention, the front side of the load-bearing rib is provided with a plurality of deformation grooves, and the plurality of deformation grooves are located on the rear side of the waist support.

[0013] According to the back support device provided in the first aspect embodiment of the present invention, the load-bearing rib and the telescopic sleeve are integrally formed.

[0014] According to the back support device provided in the first aspect of the present invention, the upper end of the load-bearing rib is provided with an arc-shaped boss, and the front side of the upper part of the back support is provided with an arc-shaped groove, the arc-shaped boss is inserted into the arc-shaped groove and can rotate.

[0015] According to the back support device provided in the first aspect embodiment of the present utility model, one end of the buckle is provided with a fixing post and the other end is provided with a snap-fit ​​post. The inner wall of the receiving cavity is provided with a fixing boss. The fixing post is fixed to the fixing boss and the snap-fit ​​post is snap-fitted into the gear slot.

[0016] According to the back support device provided in the first aspect embodiment of the present invention, the rear side of the fixing cylinder is provided with a rearwardly extending fixing piece, and the fixing piece is rotatably connected to the back bracket through a connecting shaft.

[0017] According to the back support device provided in the first aspect of the present invention, the front side of the telescopic sleeve is provided with a connecting part, the middle part of the connecting part is provided with a threaded hole, and the back is connected with a stud, the stud passing through the threaded hole.

[0018] According to the back support device provided by the first aspect of the present application, the lower end of the waist support part is connected to the lower part of the back support frame through two groups of the adjusting assemblies.

[0019] The seat provided by the second aspect of the present application has all the beneficial effects of the first aspect of the present application.

[0020] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application will be further described below in combination with the drawings and embodiments, in which:

[0022] Figure 1 The overall schematic view of the back support device provided by the embodiment of the present application is shown in the figure;

[0023] Figure 2 The exploded schematic view of the back support device provided by the embodiment of the present application is shown in the figure;

[0024] Figure 3 The sectional view of the adjusting assembly provided by the embodiment of the present application is shown in the figure;

[0025] Figure 4 The exploded schematic view of the adjusting assembly provided by the embodiment of the present application is shown in the figure;

[0026] Figure 5 The structural schematic view of the fixing cylinder and the buckle part provided by the embodiment of the present application is shown in the figure.

[0027] The figure reference numbers are as follows:

[0028] Back support frame 100; arc-shaped groove 101;

[0029] Backrest 200; waist support part 210; back support part 220;

[0030] Adjusting assembly 300; fixing cylinder 310; gear slot 311; fixing sheet 312; telescopic sleeve 320; containing cavity 321; connecting part 322; fixing boss 323; buckle part 330; fixing column 331; clamping column 332; force bearing rib 340; deformation slot 341; arc-shaped boss 342. DETAILED DESCRIPTION

[0031] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0032] In the description of the present application, it should be understood that, if the orientation description, such as the upper, lower, left, right and other indications of the orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0033] In the description of the present application, if the first, second is described for the purpose of distinguishing technical features, it cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features or implying the sequence of the indicated technical features.

[0034] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application according to the specific content of the technical scheme.

[0035] The embodiment of the present application provides a back supporting device applied to a seat, and the specific structure and function of the back supporting device provided by the embodiment of the present application will be further explained below by combining with the drawings.

[0036] Referring to Figure 1 and Figure 2 According to the back supporting device provided by the first aspect of the present application, the back supporting device comprises a back support 100, a backrest 200 and an adjusting assembly 300, the back support 100 is made of plastic, and the whole is a vertical rectangular frame structure; the backrest 200 is arranged on the front side of the back support 100, the backrest 200 comprises a waist supporting part 210 and a back supporting part 220, the waist supporting part 210 extends forward and is in an arc convex shape, which can well fit the human waist curve; the back supporting part 220 extends backward and is smoothly connected with the upper end of the waist supporting part 210, and the upper end is fixedly connected to the upper part of the back support 100 through screws and other fasteners. The upper end of the waist supporting part 210 is connected with the lower end of the back supporting part 220, the upper end of the back supporting part 220 is connected to the upper part of the back support 100, and the lower end of the waist supporting part 210 is connected to the lower part of the back support 100 through the adjusting assembly 300.

[0037] Referring to Figures 2 to 5In some embodiments, the adjusting assembly 300 comprises a fixed cylinder 310, a telescopic sleeve 320 and a buckle 330. The fixed cylinder 310 is a cylindrical structure, the rear end of which is connected to the back support 100 and can rotate up and down relative to the back support 100. The telescopic sleeve 320 is a cylindrical sleeve, the inside of which forms a containing cavity 321, and the rear side of the back support part 220 is fixedly connected by clamping or screwing and the like. One end of the buckle 330 is fixedly connected to the inner wall of the telescopic sleeve 320, and the other end extends inwardly and forms a clamping hook structure, which can be clamped into the gear slot 311 on the side wall of the fixed cylinder 310. The gear slots 311 are uniformly arranged in the front-rear direction along the axial direction of the fixed cylinder 310, and the spacing between each gear slot 311 is set according to the actual adjustment requirement.

[0038] When the user needs to adjust the position of the waist support part 210, first hold the waist support part 210 with your hand and apply a forward or backward pulling force. Since the waist support part 210 is connected to the back support part 220, the lower end of the back support part 220 will move forward and backward accordingly with the movement of the waist support part 210, thereby reducing the drop of the transition surface between the two. At the same time, the telescopic sleeve 320 will drive the buckle 330 to move forward and backward in the containing cavity 321 of the fixed cylinder 310, the buckle 330 will be separated from the current clamped gear slot 311, and will be clamped into the next gear slot 311 during the movement, realizing the fixation of the position of the waist support part 210. In this way, the user can easily adjust the position of the waist support part 210, so that the backrest 200 can closely fit the back of the user, and good support effect can be obtained, effectively relieving the waist fatigue caused by long-time sitting posture.

[0039] According to the back support device provided by the first aspect of the present application, when the user pulls the waist support part 210 to move forward and backward, not only the position of the waist support part 210 itself will change, but also the lower end of the back support part 220 will move forward and backward accordingly. This makes the drop of the transition surface between the waist support part 210 and the back support part 220 significantly reduced, so that the backrest 200 can better fit the back of the user, thereby effectively improving the user experience, allowing the user to enjoy more comfortable and fit back support effect when using the seat. At the same time, the telescopic sleeve 320 and the buckle 330 are provided, cooperating with the multiple gear slots 311 on the fixed cylinder 310, so that the adjustment position of the waist support part 210 is more accurate and stable, and the user can adjust the waist support part 210 to the most suitable position according to the actual demand and fix it stably, further improving the comfort and practicality of the seat.

[0040] Reference Figures 1 to 3, the back support device provided by the first aspect of the utility model, the adjusting assembly 300 further includes a force bearing rib 340, the force bearing rib 340 is made of material with certain elasticity, can allow certain degree of bending and deformation while providing support, to adapt to the adjusting requirement of the backrest 200. One end of the force bearing rib 340 is fixedly connected to the outer side wall of the telescopic sleeve 320, the other end is bent upwards along the rear side of the waist support part 210 and the back support part 220 from the connecting place of the telescopic sleeve 320, and is attached to the curved surface of the backrest 200. The other end of the force bearing rib 340 is connected to the upper connecting part 322 of the back support frame 100 through a rotating connecting piece such as a pivot or a hinge.

[0041] When the user pulls the waist support part 210 for forward and backward adjustment, the force bearing rib 340 can bend or stretch along with the movement of the waist support part 210, provide additional support force, and ensure that the waist support part 210 and the back support part 220 remain stable and smooth during the adjustment process. The force bearing rib 340 not only enhances the structural strength of the backrest 200, but also effectively disperses the stress generated during the adjustment process of the waist support part 210 and the back support part 220, prolonging the service life of the back support device.

[0042] Specifically, when the user pulls the waist support part 210 forward, the waist support part 210 moves the lower end of the back support part 220 forward, and the force bearing rib 340 bends and provides a reverse support force during this process, preventing excessive displacement difference between the waist support part 210 and the back support part 220. When the user pushes the waist support part 210 backward, the force bearing rib 340 stretches and provides a corresponding support force, ensuring the stability of the adjustment process.

[0043] Referring to Figure 2 , according to the back support device provided by the first aspect of the utility model, a plurality of deformation grooves 341 are provided on the front side of the force bearing rib 340, and the plurality of deformation grooves 341 are located on the rear side of the waist support part 210. Each deformation groove 341 has a longitudinal strip structure and is uniformly distributed along the length direction of the force bearing rib 340. The depth and width of the deformation groove 341 are designed according to the material properties of the force bearing rib 340 and the expected deformation requirement. For example, the depth of the deformation groove 341 can be 1 / 3 to 1 / 2 of the thickness of the force bearing rib 340, and the width can be 1 centimeter, etc., which can not only ensure that the force bearing rib 340 has sufficient strength during normal use, but also disperse stress through the deformation of the deformation groove 341 during the adjustment process of the waist support part 210, avoiding damage to the force bearing rib 340 due to local stress concentration.

[0044] When the waist support part 210 is adjusted forward, the load-bearing rib 340 is subjected to a forward pulling force, at which time the deformation groove 341 will expand to both sides, enabling the load-bearing rib 340 to bend more flexibly, thereby better adapting to the forward movement of the waist support part 210. Conversely, when the waist support part 210 is adjusted backward, the deformation groove 341 will contract, and the load-bearing rib 340 will correspondingly stretch, providing stable support force for the waist support part 210. Through the design of the deformation groove 341, the load-bearing rib 340 can more evenly distribute stress during adjustment, improving the overall stability and reliability of the back support device, while also prolonging the service life of the device, providing users with a more comfortable and reliable use experience.

[0045] With reference to Figures 2 to 4 According to the back support device provided by the first aspect of the present application, the load-bearing rib 340 and the telescopic sleeve 320 are integrally formed, and the load-bearing rib 340 and the telescopic sleeve 320 can be made of the same material and formed by injection molding. This integrally formed structure not only ensures the connection strength between the load-bearing rib 340 and the telescopic sleeve 320, avoiding malfunctions caused by loose or detached connections, but also ensures that the two can deform cooperatively when subjected to force, better adapting to the adjustment requirements of the waist support part 210.

[0046] With reference to Figure 2 According to the back support device provided by the first aspect of the present application, the upper end of the load-bearing rib 340 is provided with an arc-shaped boss 342, and the front side of the upper part of the back support frame 100 is provided with an arc-shaped groove 101 matched therewith. The arc-shaped boss 342 is in the shape of a smooth arc surface structure, and its size is slightly smaller than that of the arc-shaped groove 101, so as to be able to be smoothly inserted therein and realize rotation.

[0047] During assembly, the arc-shaped boss 342 of the load-bearing rib 340 is aligned with the arc-shaped groove 101 of the upper part of the back support frame 100, and then the arc-shaped boss 342 is inserted into the arc-shaped groove 101, and a connecting column or other connecting member is used for connection. Due to the arc surface design of the arc-shaped boss 342 and the arc-shaped groove 101, the load-bearing rib 340 can realize flexible rotation on the upper part of the back support frame 100. This enables the load-bearing rib 340 to adaptively rotate according to different force directions and angles during the adjustment of the waist support part 210, thereby better dispersing stress and improving the stability and comfort of the back support device.

[0048] With reference to Figures 3 to 5According to the back supporting device, one end of the buckle piece 330 is provided with a fixed column 331, and the other end is provided with a clamping column 332; the inner wall of the accommodating cavity 321 is provided with a fixed boss 323; the shape of the fixed column 331 is a columnar structure with a circular or square shape, and the size is matched with the fixed boss 323 on the inner wall of the telescopic sleeve 320. When assembling, the fixed column 331 is inserted into the corresponding hole position or clamping groove on the fixed boss 323, and the fixed column 331 is fixed on the fixed boss 323 in a mode of adhesion, interference fit or threaded connection. This not only ensures the stable installation of the buckle piece 330 in the telescopic sleeve 320, but also provides reliable support for the buckle piece 330 during the adjustment process of the waist supporting part 210, so as to prevent displacement or shaking of the buckle piece 330 in the telescopic sleeve 320.

[0049] The clamping column 332 is located at the other end of the buckle piece 330, and has a columnar structure with an elastic clamping hook. The elastic clamping hook of the clamping column 332 can be clamped into the gear groove 311 on the side wall of the fixed cylinder 310 flexibly. When the user pulls the waist supporting part 210 to move forward and backward, the clamping column 332 will slide forward and backward in the telescopic sleeve 320 with the buckle piece 330, and when reaching the corresponding position, the elastic clamping hook is automatically clamped into the corresponding gear groove 311, so as to realize the fixation of the position of the waist supporting part 210. At the same time, when it is necessary to adjust the position of the waist supporting part 210 again, only a certain force is applied to make the elastic clamping hook of the clamping column 332 be separated from the current gear groove 311, and then the adjustment can be continued.

[0050] With reference to Figures 2 to 4 According to the back supporting device, the rear side of the fixed cylinder 310 is provided with a fixed sheet 312 extending rearward, the fixed sheet 312 is a plate-shaped structure with a certain thickness and strength, and the shape is matched with the rear side of the fixed cylinder 310 and extends horizontally rearward from the rear side of the fixed cylinder 310. The length and width of the fixed sheet 312 are designed according to the structure of the back support 100 and the rotation requirement of the fixed cylinder 310, so as to ensure that the fixed sheet 312 can be stably connected with the back support 100 and does not hinder the normal rotation of the fixed cylinder 310. The rear end of the fixed sheet 312 is provided with a connecting hole, and the central axis of the connecting hole is perpendicular to the axis of the fixed cylinder 310. The back support 100 is provided with a connecting shaft at a corresponding position, and the shape and size of the connecting shaft are matched with the connecting hole. When assembling, the connecting hole of the fixed sheet 312 is aligned with the connecting shaft on the back support 100, and then the fixed sheet 312 is sleeved on the connecting shaft, so as to realize the rotary connection of the fixed cylinder 310 and the back support 100.

[0051] With reference to Figure 2 and Figure 3According to the back support device provided by the first aspect of the utility model, the front side of the telescopic sleeve 320 is provided with a connecting part 322, the connecting part 322 is an annular structure protruding outward from the front side of the telescopic sleeve 320, the shape of the connecting part 322 matches the outer contour of the telescopic sleeve 320, and the connecting part 322 is integrally formed with the telescopic sleeve 320, thereby ensuring the connection strength and integrity between the connecting part 322 and the telescopic sleeve 320. The middle part of the connecting part 322 is provided with a threaded hole, and the internal thread specification of the threaded hole is designed according to the stud size on the backrest 200 to ensure good cooperation between the two. The stud on the backrest 200 is an external thread structure, one end of the stud is fixedly connected to the backrest 200, the other end of the stud passes through the threaded hole of the connecting part 322 of the telescopic sleeve 320 and is fastened by a nut. Therefore, the backrest 200 and the telescopic sleeve 320 can be firmly connected together, and the backrest 200 is convenient to install and disassemble, thereby facilitating the user to maintain or replace the backrest 200.

[0052] With reference to Figure 1 and Figure 2 According to the back support device provided by the first aspect of the utility model, the lower end of the waist support part 210 is connected to the lower part of the back support frame 100 through two groups of adjusting assemblies 300, each group of adjusting assemblies 300 has the same structure, and the two groups of adjusting assemblies 300 are arranged on the two sides of the lower end of the waist support part 210. When the user adjusts the waist support part 210, the adjusting assemblies 300 on the two sides can work synchronously, and jointly bear the weight and adjusting force of the waist support part 210 and the back support part 220, so that the movement of the waist support part 210 is more stable and smooth. At the same time, the two groups of adjusting assemblies 300 also improve the overall structural strength of the back support device, so that the stability of the connection between the waist support part 210 and the back support frame 100 can be ensured even in the case that the user applies a larger adjusting force or uses for a long time, and problems such as uneven stress, deformation or damage that may occur in a single adjusting assembly 300 are effectively avoided, thereby providing the user with a safer, more reliable and more comfortable use experience.

[0053] According to the seat provided by the second aspect of the utility model, the seat has all the beneficial effects of the first aspect of the utility model.

[0054] Of course, the utility model is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the present application.

Claims

1. A back support device, characterized by The back support device comprises: a back support; a backrest arranged on the front side of the back support, the backrest comprising a waist support part extending forward and a back support part extending backward, the upper end of the waist support part being connected with the lower end of the back support part, the upper end of the back support part being connected with the upper part of the back support, the lower end of the waist support part being connected with the lower part of the back support through an adjusting assembly; the adjusting assembly comprising a fixed cylinder, a telescopic sleeve and a buckle, the telescopic sleeve being connected with the back side of the back support part and having a receiving cavity, the buckle being connected with the telescopic sleeve and located in the receiving cavity, the fixed cylinder being rotationally connected with the front side of the back support and extending into the receiving cavity, the side wall of the fixed cylinder facing the buckle being provided with a plurality of gear grooves arranged in the front-back direction, the buckle being capable of being clamped into the gear grooves at different positions when moving forward and backward. When the waist support part moves forward and backward, the waist support part can drive the lower end of the back support part to move forward and backward, and drive the telescopic sleeve and the buckle to move forward and backward, and the buckle can be clamped into the gear grooves at different positions when moving forward and backward.

2. The back support device of claim 1, wherein The adjusting assembly further comprises a force-bearing rib, one end of the force-bearing rib being connected with the telescopic sleeve, the other end of the force-bearing rib being bent upward after extending along the back side of the waist support part and the back support part, and the other end of the force-bearing rib being rotationally connected with the upper part of the back support.

3. The back support device of claim 2, wherein The front side of the force-bearing rib is provided with a plurality of deformation grooves, and the plurality of deformation grooves are located on the back side of the waist support part.

4. The back support device of claim 2, wherein The force-bearing rib and the telescopic sleeve are integrally formed.

5. The back support device of claim 2, wherein The upper end of the force-bearing rib is provided with an arc-shaped boss, the front side of the upper part of the back support is provided with an arc-shaped groove, the arc-shaped boss is inserted into the arc-shaped groove and is capable of rotating.

6. The back support device of claim 1, wherein One end of the buckle is provided with a fixed column, the other end of the buckle is provided with a clamping column, the inner wall of the receiving cavity is provided with a fixed boss, the fixed column is fixed to the fixed boss, and the clamping column is clamped into the gear groove.

7. The back support device of claim 1, wherein The rear side of the fixed cylinder is provided with a fixed sheet extending backward, and the fixed sheet is rotationally connected with the back support through a connecting shaft.

8. The back support device of claim 1, wherein, The front side of the telescopic sleeve is provided with a connecting part, the middle part of the connecting part is provided with a threaded hole, a threaded column is connected with the backrest, and the threaded column is arranged in the threaded hole.

9. The back support device of claim 1, wherein, The lower end of the waist support part is connected with the lower part of the back support through two groups of adjusting assemblies.

10. A seat, characterized by The back support device comprises: the back support device according to any one of claims 1 to 9.

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