Waist supporting device and seat

Abstract

The utility model discloses a waist supporting device and a seat. The waist supporting device comprises a back support, a waist supporting assembly and a control assembly. The waist supporting assembly comprises a fixing cylinder, a telescopic sleeve and a waist rest, the fixing cylinder is connected to the back support and provided with a containing cavity, the telescopic sleeve is arranged in the containing cavity and can slide, the waist rest is arranged on the front side of the telescopic sleeve, and a plurality of gear grooves are formed in the side wall of the telescopic sleeve; the control assembly comprises a control rod, a gear clamping piece and a first elastic piece, the fixing cylinder is provided with a mounting table, the mounting table is provided with a mounting groove, the bottom wall of the mounting groove is provided with a through hole communicating with the containing cavity, the gear clamping piece is provided with clamping teeth and is arranged in the mounting groove, and the first elastic piece is arranged in the mounting groove and can push the gear clamping piece; and the control rod is connected to the mounting table and can drive the gear clamping piece to move, so that the clamping teeth are separated from the gear grooves. According to the waist supporting device, the functions of adjusting the position of the waist rest and automatically locking the waist rest are achieved.

Description

TECHNICAL FIELD

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

[0002] The structure of the seat comprises a cushion, a backrest, an armrest and a waist rest, the waist rest can provide support for the human waist and can improve the comfort, but in the related technology, the waist rest of part of the seat is fixed on the back support, cannot be adjusted according to the use demand of the user, and influences the use experience of the user. SUMMARY

[0003] The utility model discloses at least solve one of the technical problems in the prior art. To this end, the utility model provides a waist support device, realize the adjustable and automatic locking function of waist rest position, improve comfort and user experience significantly.

[0004] In a second aspect, the utility model further provides a seat applying the above-mentioned waist support device.

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

[0006] A back support;

[0007] A waist support assembly, comprising a fixed cylinder, a telescopic sleeve and a waist rest, the fixed cylinder is connected to the back support and has a containing cavity with an opening forward, the telescopic sleeve is arranged in the containing cavity and can slide forward and backward, the waist rest is arranged on the front side of the telescopic sleeve, and the side wall of the telescopic sleeve is spaced apart and provided with a plurality of gear grooves along the front and back directions;

[0008] A control assembly, comprising a control rod, a gear clamping piece and a first elastic piece, the fixed cylinder is provided with a mounting table close to the side wall of the plurality of gear grooves, the inside of the mounting table is provided with a mounting groove, the bottom wall of the mounting groove is provided with a through hole communicating with the containing cavity, the gear clamping piece is provided with a clamping tooth and arranged in the mounting groove, the clamping tooth is arranged in the through hole and can move towards or away from the gear groove, the first elastic piece is arranged in the mounting groove, the first elastic piece is configured to push the gear clamping piece to make the clamping tooth clamped into the gear groove, and the control rod is connected to the mounting table and is configured to drive the gear clamping piece to move in the direction away from the gear groove to make the clamping tooth separate from the gear groove.

[0009] The waist support device has the following beneficial effects: the telescopic sleeve in the waist support assembly can slide forward and backward in the accommodating cavity of the fixed cylinder, thereby driving the waist rest to move forward and backward, and meeting the waist support requirements of users in different scenes.

[0010] The control lever is rotationally connected to the mounting table, the control lever is provided with a cam, the gear clamping piece is provided with a clamping groove, and the cam is arranged in the clamping groove.

[0011] The waist support assembly comprises a second elastic piece, the second elastic piece is arranged in the accommodating cavity and abuts against the bottom wall of the accommodating cavity and the telescopic sleeve at both ends, and the second elastic piece is configured to be capable of pushing the telescopic sleeve forward.

[0012] The telescopic sleeve is provided with a guide column arranged in the front-rear direction, the bottom wall of the accommodating cavity is provided with an abutment table, and the second elastic piece is sleeved on the guide column and abuts against the abutment table at an end.

[0013] The waist support assembly further comprises a connecting seat and a third elastic piece, the connecting seat is arranged on the front side of the telescopic sleeve, the middle part of the waist rest is provided with a connecting boss, the upper end of the connecting seat is provided with a rotating shaft, the upper end of the connecting boss is rotationally connected to the rotating shaft, and the third elastic piece is arranged between the connecting seat and the connecting boss and located on the lower side of the rotating shaft.

[0014] The rear side of the connecting boss is provided with a positioning column, the front side of the connecting seat is provided with a positioning groove, one end of the third elastic piece is sleeved on the positioning column, and the other end abuts against the bottom wall of the positioning groove.

[0015] The two sides of the back support are provided with support arms extending towards the waist rest, and a buffer assembly is arranged between the waist rest and the support arms.

[0016] According to the waist support device provided by the first aspect of the utility model, the buffer assembly comprises a telescopic rod and a fourth elastic member, two ends of the telescopic rod are connected with the waist rest and the support arm respectively, and the fourth elastic member is a spring and is sleeved on the telescopic rod.

[0017] According to the waist support device provided by the first aspect of the utility model, the mounting table and the fixed cylinder are in an integrated structure.

[0018] 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.

[0019] The additional aspects and advantages of the utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described below in combination with the drawings and embodiments, wherein:

[0021] Figure 1 The overall schematic view of the waist support device provided by the embodiment of the utility model is shown in the figure;

[0022] Figure 2 The exploded schematic view of the waist support device provided by the embodiment of the utility model is shown in the figure;

[0023] Figure 3 The sectional view of the waist support device provided by the embodiment of the utility model is shown in the figure;

[0024] Figure 4 The structure schematic view of the telescopic sleeve of the waist support device provided by the embodiment of the utility model is shown in the figure.

[0025] The reference signs are as follows:

[0026] Back support 100; support arm 110;

[0027] Waist support assembly 200; fixed cylinder 210; accommodating cavity 211; mounting table 212; abutting table 213; telescopic sleeve 220; gear slot 221; guide column 222; waist rest 230; connecting boss 231; second elastic member 240; third elastic member 250; connecting seat 260;

[0028] Control assembly 300; control rod 310; cam 311; gear clamping member 320; clamping tooth 321; clamping groove 322; first elastic member 330;

[0029] Buffer assembly 400. DETAILED DESCRIPTION

[0030] 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 reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0031] In the description of the present application, it should be understood that, if the orientation description, such as the upper, lower, left, right and the like, is described, the orientation or position relationship shown in the drawings is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

[0032] 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 technical features or implicitly indicating the number of the technical features indicated or the sequence of the technical features indicated.

[0033] 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 in combination with the specific content of the technical solution.

[0034] The embodiment of the present application provides a waist support device applied to a seat, and the specific structure and functions of the waist support device provided by the embodiment of the present application will be further described below in combination with the drawings.

[0035] Referring to Figures 1 to 4 According to the waist support device provided by the first aspect of the present application, the waist support device comprises a back support 100, a waist support assembly 200 and a control assembly 300, the back support 100 is used as a support base of the whole device, and is stable in structure and can be connected with other seat parts (such as a seat cushion, a bottom plate and the like).

[0036] The waist support assembly 200 comprises a fixed cylinder 210, a telescopic sleeve 220 and a waist rest 230. The fixed cylinder 210 is connected to the back support 100 and has an accommodation cavity 211 with an opening forward. The telescopic sleeve 220 is closely arranged in the accommodation cavity 211 and can freely slide along the front-rear direction of the accommodation cavity 211. The waist rest 230 is fixed to the front side of the telescopic sleeve 220 and moves forward and backward along with the sliding of the telescopic sleeve 220, thereby providing the waist support of different positions for the user. A plurality of gear grooves 221 are arranged on the side wall of the telescopic sleeve 220 and spaced along the front-rear direction, and the plurality of gear grooves 221 are used for cooperating with the gear clamping piece 320 in the control assembly 300, so as to realize the locking and unlocking of the position of the waist rest 230.

[0037] The control assembly 300 comprises a control lever 310, a gear clamping piece 320 and a first elastic piece 330. The fixed cylinder 210 is provided with a mounting table 212 on the side wall close to the gear slot 221, and the mounting table 212 is internally provided with a mounting groove. The bottom wall of the mounting groove is provided with a through hole communicating with the containing cavity 211, so that the gear clamping piece 320 can be arranged in the through hole and move towards or away from the gear slot 221. The gear clamping piece 320 is provided with a clamping tooth 321, and when the clamping tooth 321 is clamped into the gear slot 221, the position of the lumbar support 230 is locked. The first elastic piece 330 is arranged in the mounting groove, and the elastic force of the first elastic piece 330 can push the gear clamping piece 320 to stably clamp the clamping tooth 321 into the gear slot 221. The control lever 310 is connected to the mounting table 212 and extends out of the surface of the seat, facilitating user operation. When the user needs to adjust the position of the lumbar support 230, the control lever 310 is only needed to be operated to drive the gear clamping piece 320 to move away from the gear slot 221, so that the clamping tooth 321 is separated from the gear slot 221. At this time, the telescopic sleeve 220 can freely slide in the containing cavity 211, and the user can adjust the position of the lumbar support 230 forward or backward according to needs. When the user releases the control lever 310, the clamping tooth 321 of the gear clamping piece 320 can be clamped into the gear slot 221 on the telescopic sleeve 220 under the pushing of the first elastic piece 330, so as to realize automatic locking after adjustment.

[0038] According to the lumbar support device provided by the first aspect of the utility model, the telescopic sleeve 220 in the lumbar support assembly 200 can slide forward and backward in the containing cavity 211 of the fixed cylinder 210, thereby driving the lumbar support 230 to move forward and backward, so as to meet the lumbar support needs of the user in different scenes. The user only needs to simply operate the control lever 310 of the control assembly 300 to realize unlocking and adjustment of the position of the lumbar support 230. When adjusted to a suitable position, the gear clamping piece 320 is automatically clamped into the gear slot 221 at different positions under the pushing of the first elastic piece 330, so as to realize automatic locking of the position of the lumbar support 230, without the need for additional locking operation by the user, greatly improving the convenience of use and being beneficial to improving the user experience.

[0039] With reference to Figures 1 to 3 According to the lumbar support device provided by the first aspect of the utility model, the control lever 310 is rotationally connected to the mounting table 212 and penetrates the mounting groove in the left-right direction, and the middle part of the control lever 310 is provided with a cam 311, which has a specific profile shape and can be matched with the gear clamping piece 320. The gear clamping piece 320 is provided with a clamping groove 322 for accommodating the cam 311. When the control lever 310 is in the initial position, the clamping tooth 321 of the gear clamping piece 320 is tightly clamped into the gear slot 221 under the pushing of the first elastic piece 330, so as to realize locking of the position of the lumbar support 230.

[0040] When the user needs to adjust the position of the lumbar support 230, the user only needs to rotate the control rod 310, and the cam 311 will rotate accordingly. Due to the cooperation between the cam 311 and the clamping groove 322, the rotation of the cam 311 will drive the gear clamping piece 320 to move in a direction away from the gear slot 221. This makes the clamping teeth 321 gradually separate from the gear slot 221, thereby releasing the locking of the telescopic sleeve 220. At this time, the user can freely slide the telescopic sleeve 220 forward and backward, thereby adjusting the position of the lumbar support 230.

[0041] When the user adjusts to a suitable position of the lumbar support 230, the control rod 310 is released, and under the push of the first elastic member 330, the gear clamping piece 320 will move again in the direction of the gear slot 221 until the clamping teeth 321 are re-clamped into the gear slot 221. During the movement of the gear clamping piece 320 in the direction of the gear slot 221, the cam 311 will be pushed to drive the control rod 310 to reset, thereby realizing the automatic locking of the position of the lumbar support 230 and the automatic resetting of the control rod 310.

[0042] Referring to Figure 2 and Figure 3 , according to the lumbar support device provided by the first aspect of the present application, the lumbar support assembly 200 comprises a second elastic member 240, which is arranged in the accommodating cavity 211 of the fixed cylinder 210 and abuts against the bottom wall of the accommodating cavity 211 and the telescopic sleeve 220 at both ends. This makes the second elastic member 240 able to push the telescopic sleeve 220 forward in a natural state, thereby providing a certain pre-tightening force for the lumbar support 230. When the user needs to adjust the lumbar support 230 backward, the user only needs to overcome the elastic force of the second elastic member 240 to move the telescopic sleeve 220 backward. When the user releases the control rod 310 and the gear slot 221 and the clamping teeth 321 of the gear clamping piece 320 are misaligned, the second elastic member 240 will automatically push the telescopic sleeve 220 (and the lumbar support 230) to move forward until the gear clamping piece 320 is aligned with the gear slot 221, so that the gear clamping piece 320 can be automatically clamped into the gear slot 221.

[0043] Referring to Figure 3 and Figure 4According to the waist support device provided by the first aspect of the utility model, the telescopic sleeve 220 is internally provided with a guide column 222 arranged in the front-rear direction, the bottom wall of the accommodating cavity 211 is provided with an abutting table 213, and the second elastic member 240 is sleeved on the guide column 222 and abuts against the abutting table 213 at the end. The guide column 222 not only provides accurate guidance for the front-rear sliding of the telescopic sleeve 220, but also serves as the mounting base of the second elastic member 240. The bottom wall of the accommodating cavity 211 is provided with the abutting table 213, the position of the abutting table 213 corresponds to that of the guide column 222, and the abutting table 213 is used for supporting one end of the second elastic member 240. One end of the second elastic member 240 is sleeved on the guide column 222, and the other end abuts against the abutting table 213 tightly, which ensures that the second elastic member 240 can always maintain a stable compression or stretching state during the sliding of the telescopic sleeve 220, thereby continuously providing a forward pushing force for the telescopic sleeve 220.

[0044] With reference to Figure 2 and Figure 3 According to the waist support device provided by the first aspect of the utility model, the waist support assembly 200 further comprises a connecting seat 260 and a third elastic member 250, and the connecting seat 260 is mounted on the front side of the telescopic sleeve 220. The middle part of the waist rest 230 is provided with a connecting boss 231, and the upper end of the connecting boss 231 is rotationally connected with the upper end of the connecting seat 260 through a rotating shaft. This enables the waist rest 230 to rotate relative to the connecting seat 260 (i.e. the telescopic sleeve 220) within a certain range.

[0045] The third elastic member 250 is arranged between the connecting seat 260 and the connecting boss 231 and located on the lower side of the rotating shaft. The third elastic member 250 can adopt a spring, a spring sheet or other structure forms with elastic restoring force. When the waist of the user abuts against the waist rest 230, if a certain lateral force or torsional force is exerted on the waist rest 230 by the waist, the waist rest 230 will rotate around the rotating shaft. In this process, the third elastic member 250 will be compressed or stretched, thereby absorbing and buffering the impact force between the waist and the waist rest 230.

[0046] When the waist of the user leaves the waist rest 230 or the lateral force or the torsional force disappears, the third elastic member 250 will push the waist rest 230 back to the initial position by virtue of the elastic restoring force thereof. In this way, not only the stable support effect of the waist rest 230 is ensured, but also the direct impact between the waist of the user and the waist rest 230 is reduced through the rotation buffering function, thereby improving the comfort of the seat and the use experience of the user.

[0047] With reference to Figure 3According to the waist support device provided by the first aspect of the utility model, the rear side of the connecting boss 231 is provided with a positioning column (not shown in the figure), which can be cylindrical, square or other suitable shapes, and its main function is to serve as a fixing point of one end of the third elastic member 250. The front side (i.e. the side facing the connecting boss 231) of the connecting seat 260 is provided with a positioning groove (not shown in the figure), one end of the third elastic member 250 is sleeved on the positioning column, and the other end abuts against the bottom wall of the positioning groove. When the waist rest 230 rotates, the third elastic member 250 will be compressed or stretched under the constraint of the positioning column and the positioning groove, thereby absorbing and buffering the impact force between the waist and the waist rest 230. Through this design, the installation and positioning of the third elastic member 250 are more stable and reliable, and will not be displaced or fall off due to the rotation of the waist rest 230. At the same time, the positioning column and the positioning groove also simplify the installation process of the third elastic member 250, improving the production efficiency. In addition, this structure also makes the replacement of the third elastic member 250 more convenient. When the third elastic member 250 fails due to long-term use, it can be easily taken out from the positioning column and the positioning groove and replaced with a new third elastic member 250.

[0048] With reference to Figures 1 to 3 According to the waist support device provided by the first aspect of the utility model, the back support 100 serves as the main support structure of the seat, and the support arms 110 are extended from both sides thereof. The support arms 110 can be straight arms, bent arms or other shapes, and the main purpose is to provide a stable support point for the waist rest 230. Between the waist rest 230 and the support arms 110, the buffer assembly 400 is arranged. The buffer assembly 400 can adopt various forms, such as springs, air bags, elastic material blocks, etc., and its main function is to absorb and disperse the impact between the waist and the waist rest 230, and to provide a soft support feeling. When the user sits on the seat and the waist abuts against the waist rest 230, the buffer assembly 400 will be compressed, thereby absorbing the impact force of the waist and providing continuous support for the waist through the elastic restoring force of itself. Through this design, the waist rest 230 not only can stably support the user's waist, but also can reduce the direct impact between the waist and the waist rest 230 through the action of the buffer assembly 400, thereby improving the comfort and protection of the seat. At the same time, the arrangement of the support arms 110 also enhances the stability of the waist rest 230, preventing the waist rest 230 from shaking or shifting when subjected to force.

[0049] With reference to Figures 1 to 3According to the waist support device provided by the first aspect of the utility model, the buffer assembly 400 comprises a telescopic rod, and the two ends of the telescopic rod are connected to the waist rest 230 and the support arm 110 respectively. The telescopic rod can be designed as a multi-section type or a telescopic sleeve 220 cylinder type, so as to ensure that the telescopic rod can be elongated or shortened as required when the waist applies pressure to the waist rest 230, thereby adapting to the dynamic change of the waist. The two ends of the telescopic rod can be connected to the waist rest 230 and the support arm 110 respectively through hinging, insertion or other movable connection modes, so as to ensure that the waist force and movement can be flexibly transmitted.

[0050] On the telescopic rod, a fourth elastic member is sleeved, and the fourth elastic member is a spring. The spring can be closely sleeved on the outside of the telescopic rod. When the waist applies pressure to the waist rest 230, the telescopic rod and the spring can absorb and store the impact force of the waist. When the waist pressure decreases or disappears, the spring will push the telescopic rod to shorten by virtue of the elastic restoring force, and then drive the waist rest 230 to return to the initial position. Through this design, the buffer assembly 400 can not only effectively absorb and disperse the impact of the waist on the waist rest 230, but also provide continuous and soft support for the waist through the elastic restoring force of the spring. This not only improves the comfort of the seat, but also protects the waist of the user from excessive impact and reduces the risk of waist injury.

[0051] Referring to Figures 1 to 3 According to the waist support device provided by the first aspect of the utility model, the outer wall of the fixing cylinder 210 protrudes with a surrounding edge to surround the mounting table 212, and the surrounding edge forming the mounting table 212 is integrally formed with the fixing cylinder 210, which is beneficial to enhancing the structural strength between the mounting table 212 and the fixing cylinder 210.

[0052] 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.

[0053] 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 lumbar support device, characterized by, The lumbar support device comprises a back support, a lumbar support assembly, a control assembly, and a buffer assembly. The lumbar support assembly comprises a fixed cylinder, a telescopic sleeve, and a lumbar support. The fixed cylinder is connected to the back support and has a forward-facing accommodating cavity. The telescopic sleeve is arranged in the accommodating cavity and can slide forward and backward.

2. The lumbar support device of claim 1, wherein, The lumbar support is arranged on the front side of the telescopic sleeve.

3. The lumbar support device of claim 1, wherein, The side wall of the telescopic sleeve is spaced apart in the front-rear direction and has a plurality of gear slots.

4. The lumbar support device of claim 3, wherein, The control assembly comprises a control rod, a gear clamping piece, and a first elastic piece.

5. The lumbar support device of claim 1, wherein, The fixed cylinder is provided with a mounting table near the side wall of the plurality of gear slots.

6. The lumbar support device of claim 5, wherein, The inside of the mounting table is provided with a mounting slot.

7. The lumbar support device of claim 1, wherein, The bottom wall of the mounting slot is provided with a through hole communicating with the accommodating cavity.

8. The lumbar support device of claim 7, wherein, The gear clamping piece is arranged in the mounting slot and has a clamping tooth.

9. The lumbar support device of claim 1, wherein, The clamping tooth passes through the through hole and can move towards or away from the gear slot.

10. A seat, characterized by The first elastic piece is arranged in the mounting slot and is configured to push the gear clamping piece so that the clamping tooth is clamped into the gear slot. The control rod is connected to the mounting table and is configured to drive the gear clamping piece to move away from the gear slot so that the clamping tooth is separated from the gear slot. The control rod is rotationally connected to the mounting table. The control rod is provided with a cam. The gear clamping piece is provided with a clamping slot. The cam is arranged in the clamping slot. Rotating the control rod, the cam can drive the gear clamping piece to move so that the clamping tooth is separated from the gear slot. The lumbar support assembly comprises a second elastic piece. The second elastic piece is arranged in the accommodating cavity and abuts the bottom wall of the accommodating cavity and the telescopic sleeve at both ends. The second elastic piece is configured to push the telescopic sleeve forward. The telescopic sleeve is provided with a guide column arranged in the front-rear direction. The bottom wall of the accommodating cavity is provided with an abutting table. The second elastic piece is sleeved on the guide column and abuts the abutting table at the end. The lumbar support assembly further comprises a connecting seat and a third elastic piece. The connecting seat is arranged on the front side of the telescopic sleeve. The middle part of the lumbar support is provided with a connecting boss. The upper end of the connecting seat is provided with a rotating shaft. The upper end of the connecting boss is rotationally connected to the rotating shaft. The third elastic piece is arranged between the connecting seat and the connecting boss and is located on the lower side of the rotating shaft. The rear side of the connecting boss is provided with a positioning column. The front side of the connecting seat is provided with a positioning slot. One end of the third elastic piece is sleeved on the positioning column. The other end abuts the bottom wall of the positioning slot. The back support is provided with a support arm extending towards the lumbar support on both sides. The lumbar support and the support arm are provided with a buffer assembly therebetween. The buffer assembly comprises a telescopic rod and a fourth elastic piece. The telescopic rod is connected to the lumbar support and the support arm at both ends. The fourth elastic piece is a spring and is sleeved on the telescopic rod. The mounting table and the fixed cylinder are integrally formed. The lumbar support device comprises any one of claims 1 to 9. The lumbar support device comprises any one of claims 1 to 9.

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