Waist support supporting structure capable of adjusting waist chasing angle

Abstract

The utility model discloses a waist support supporting structure capable of adjusting a waist chasing angle, which is characterized in that a waist support cross beam is connected with a sliding block through a rotating shaft and a nut, a cam shaft penetrates through the waist support cross beam and then is sleeved with an adjusting knob, a compression spring is arranged between the waist support cross beam and the sliding block, and the waist support cross beam rotates and inclines backwards by taking the rotating shaft as an axis after being stressed; the angle limit of rotation and retroversion of the waist support cross beam can be adjusted by rotating the adjusting knob. According to the technical scheme, the angle limit of rotation and backward inclination of the waist support cross beam can be adjusted through the adjusting knob, and the problems that the angle adjusting range of a waist support capable of performing passive angle adjustment of an existing seat cannot be adjusted, and adjustment is difficult to perform according to self requirements for a user are solved.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to a lumbar support structure capable of adjusting the chasing waist angle. Background Art

[0002] A lumbar support, also often referred to as a lumbar support or lumbar cushion, is an auxiliary device designed to support the human lumbar region and is usually used on chairs. The functions of the lumbar support are: supporting the spine, reducing muscle tension, and improving sitting posture. The existing connection and adjustment structures of lumbar supports can only be adjusted up and down with the backrest to adapt to the position of the lumbar region, and cannot passively adjust the angle according to the lumbar dimensions and shapes of users with different body types, making it difficult to provide full-wrap support for the user's lumbar region. The adjustable angle range of the lumbar support that can make passive angle adjustment is not adjustable, and it is difficult for users to make adjustments according to their own needs. Content of the Utility Model

[0003] The utility model discloses a lumbar support structure capable of adjusting the chasing waist angle, wherein a lumbar support cross beam and a sliding block are connected by a rotating shaft and a nut, a camshaft passes through the lumbar support cross beam and is sleeved with an adjusting knob, and a compression spring is arranged between the lumbar support cross beam and the sliding block. After the lumbar support cross beam is stressed, it will rotate and tilt backward with the rotating shaft as the axis, and rotating the adjusting knob can adjust the angle limit of the rotation and backward tilt of the lumbar support cross beam. The technical solution of the utility model that the angle limit of the rotation and backward tilt of the lumbar support cross beam can be adjusted by the adjusting knob solves the problem that the adjustable angle range of the lumbar support of the existing seat that can make passive angle adjustment is not adjustable, and it is difficult for users to make adjustments according to their own needs.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A lumbar support structure capable of adjusting the chasing waist angle, wherein a lumbar support cross beam and a sliding block are connected by a rotating shaft and a nut, including: a compression spring, a camshaft, and an adjusting knob. The camshaft passes through the lumbar support cross beam and is sleeved with the adjusting knob. The compression spring is arranged between the lumbar support cross beam and the sliding block. After the lumbar support cross beam is stressed, it will rotate and tilt backward with the rotating shaft as the axis, and rotating the adjusting knob can adjust the angle limit of the rotation and backward tilt of the lumbar support cross beam.

[0006] Further setting, the lumbar support cross beam is provided with: a spring installation groove, a rotating shaft hole one, a camshaft hole one, a limiting groove one, a camshaft hole two, a limiting boss one, a limiting rib one, a limiting rib two, and a column hole. One end of the compression spring is arranged in the spring installation groove, a ball spring is arranged in the column hole, and an elastic ball head is arranged on the end face of the ball spring.

[0007] Further setting, the sliding block is provided with: a rotating shaft hole two, a limiting step one, a limiting step two, a limiting step three, a dovetail groove, and a spring installation position. The other end of the compression spring is arranged in the spring installation position.

[0008] Further, the rotating shaft passes through the first rotating shaft hole and the second rotating shaft hole and then is connected to the nut.

[0009] Further, one end of the camshaft is the tail of the camshaft, the other end of the camshaft is the end of the camshaft, and a cam is provided in the middle section of the camshaft. The cam is provided with: a fourth limiting step.

[0010] Further, the end face of the adjusting knob connected to the camshaft is provided with: a second limiting groove, a third limiting groove, and a ball head positioning pit. The elastic ball head can be snapped into the ball head positioning pit for positioning. The end of the camshaft passes through the first camshaft hole and the second camshaft hole in sequence and then is embedded in the third limiting groove and connected to the screw. The first limiting boss is embedded in the second limiting groove, and the outer end face of the adjusting knob is connected to the knob plug.

[0011] Further, rotate the adjusting knob to the position where the fourth limiting step contacts the first limiting groove. At this time, the minimum diameter of the cam abuts against the third limiting step. At this time, the included angle between the first limiting rib and the first limiting step is α°. Therefore, the rotatable angle of the lumbar support cross beam and the sliding block around the rotating shaft at this time is α°.

[0012] Further, rotate the adjusting knob until the middle diameter of the cam abuts against the third limiting step. At this time, the included angle between the first limiting rib and the first limiting step is 1 / 2α°. At this time, the rotatable angle of the lumbar support cross beam and the sliding block around the rotating shaft is 1 / 2α°.

[0013] Further, rotate the adjusting knob until the maximum diameter of the cam abuts against the third limiting step. At this time, the first limiting rib contacts the first limiting step. At this time, the rotatable angle of the lumbar support cross beam and the sliding block around the rotating shaft is 0°.

[0014] Further, the dovetail groove is connected to the circulating lifting base, and the sliding block can perform lifting movement within the range of the circulating lifting base; the lumbar support cross beam is connected to the lumbar support main body through an adaptive elastic member.

[0015] The technical solution of the present utility model can adjust the angle limit of the backward rotation of the lumbar support cross beam through the adjusting knob, which solves the problem that the adjustable range of the lumbar support angle of the existing seat that can perform passive angle adjustment is not adjustable, and it is difficult for the user to adjust according to their own needs. Brief Description of the Drawings

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

[0017] Figure 2 is an exploded view of the present utility model;

[0018] Figure 3 is a perspective view of the lumbar support cross beam of the present utility model Figure 1 ;

[0019] Figure 4 is the three-dimensional view of the waist support crossbeam of the present utility model Figure 2 ;

[0020] Figure 5 is the three-dimensional view of the camshaft of the present utility model Figure 1 ;

[0021] Figure 6 is the three-dimensional view of the camshaft of the present utility model Figure 2 ;

[0022] Figure 7 is the three-dimensional view of the adjusting knob of the present utility model Figure 1 ;

[0023] Figure 8 is the three-dimensional view of the adjusting knob of the present utility model Figure 2 ;

[0024] Figure 9 is the three-dimensional view of the sliding block of the present utility model;

[0025] Figure 10 is the side view of the present utility model in the state of maximum chasing waist tilting angle;

[0026] Figure 11 is the sectional view of the present utility model in the state of maximum chasing waist tilting angle;

[0027] Figure 12 is the side view of the present utility model in the state of half chasing waist tilting angle;

[0028] Figure 13 is the sectional view of the present utility model in the state of half chasing waist tilting angle;

[0029] Figure 14 is the side view of the present utility model in the state of chasing waist tilting angle of 0°;

[0030] Figure 15 is the sectional view of the present utility model in the state of chasing waist tilting angle of 0°;

[0031] Figure 16 is the three-dimensional view of the assembled state of the present utility model with the waist support and the lifting base;

[0032] Figure 17 is Figure 16 exploded view of;

[0033] In the figure: lumbar support cross beam 1, spring installation groove 11, first rotation shaft hole 12, first camshaft hole 13, first limiting groove 14, second camshaft hole 15, first limiting boss 16, first limiting rib 17, second limiting rib 18, column hole 19, sliding block 2, second rotation shaft hole 21, first limiting step 22, second limiting step 23, third limiting step 24, dovetail groove 25, spring installation position 26

[0034] Compression spring 31, rotation shaft 32, nut 33

[0035] Camshaft 4, camshaft tail 41, cam 42, camshaft end 43, fourth limiting step 44, ball bead spring 5, elastic ball head 51

[0036] Adjusting knob 6, second limiting groove 61, third limiting groove 62, ball head positioning pit 63, screw 71, knob plug 72, circulating lifting base 81, lumbar support main body 82, adaptive elastic member 83 Detailed implementation manners

[0037] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings.

[0038] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific implementation manners disclosed below.

[0039] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When detailing the implementation manners of the present utility model, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0040] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following will further describe in detail the implementation manners of the present utility model with reference to the accompanying drawings.

[0041] According to the content of the claims and the specification, the specific implementation manners are as follows:

[0042] As Figure 1-17As shown: An adjustable lumbar support structure for chasing the lumbar angle, in which the lumbar support cross beam 1 and the sliding block 2 are connected by a rotating shaft 32 and a nut 33. The support structure includes: a compression spring 31, a camshaft 4, and an adjustment knob 6. The camshaft 4 passes through the lumbar support cross beam 1 and is sleeved with the adjustment knob 6. The compression spring 31 is arranged between the lumbar support cross beam 1 and the sliding block 2. When the lumbar support cross beam 1 is stressed, it will rotate and tilt backward with the rotating shaft 32 as the axis. Rotating the adjustment knob 6 can adjust the angle limit of the rotation and backward tilt of the lumbar support cross beam 1.

[0043] In the technical solution of the present utility model, the angle limit of the rotation and backward tilt of the lumbar support cross beam 1 can be adjusted by the adjustment knob 6, which solves the problem that the adjustable angle range of the lumbar support of the existing seat that can make passive angle adjustment is not adjustable, and it is difficult for the user to make adjustments according to their own needs.

[0044] Preferably, the lumbar support cross beam 1 is provided with: a spring installation groove 11, a rotating shaft hole one 12, a camshaft hole one 13, a limit groove one 14, a camshaft hole two 15, a limit boss one 16, a limit rib one 17, a limit rib two 18, a column hole 19. One end of the compression spring 31 is arranged in the spring installation groove 11. A ball spring 5 is arranged in the column hole 19, and an elastic ball head 51 is arranged on the end face of the ball spring 5.

[0045] Preferably, the sliding block 2 is provided with: a rotating shaft hole two 21, a limit step one 22, a limit step two 23, a limit step three 24, a dovetail groove 25, a spring installation position 26. The other end of the compression spring 31 is arranged in the spring installation position 26. The compression spring 31 is compressed when the lumbar support cross beam 1 is pressed, and expands when the lumbar support cross beam 1 is not pressed.

[0046] Preferably, the rotating shaft 32 passes through the rotating shaft hole one 12 and the rotating shaft hole two 21 and is then connected to the nut 33.

[0047] Preferably, one end of the camshaft 4 is a camshaft tail 41, the other end of the camshaft 4 is a camshaft end 43, and a cam 42 is arranged in the middle section of the camshaft 4. The cam 42 is provided with: a limit step four 44.

[0048] Preferably, the end face of the adjustment knob 6 connected to the camshaft 4 is provided with: a limit groove two 61, a limit groove three 62, a ball head positioning pit 63. The elastic ball head 51 can be snapped into the ball head positioning pit 63 for positioning. The elastic ball head 51 can be snapped into different ball head positioning pits 63 with the rotation of the adjustment knob 6 for positioning, which is convenient for the user to accurately position the adjustment of the chasing lumbar angle. The camshaft end 43 passes through the camshaft hole one 13 and the camshaft hole two 15 in sequence and is then embedded in the limit groove three 62 and connected to the screw 71. The limit boss one 16 is embedded in the limit groove two 61, and the outer end face of the adjustment knob 6 is connected to the knob cover 72.

[0049] Preferably, as Figure 10-11As shown: Rotate the adjustment knob 6 to the position where the limiting step four 44 contacts the limiting groove one 14. At this time, the minimum diameter of the cam 42 abuts against the limiting step three 24. At this time, the included angle between the limiting rib one 17 and the limiting step one 22 is α°. Therefore, the rotatable angle of the lumbar support crossbeam 1 and the sliding block 2 around the rotating shaft 32 at this time is α°. It is suitable for users who need a large-stroke lumbar tracking function.

[0050] Preferably, as Figure 12-13 shown: Rotate the adjustment knob 6 until the middle diameter of the cam 42 abuts against the limiting step three 24. At this time, the included angle between the limiting rib one 17 and the limiting step one 22 is 1 / 2α°. At this time, the rotatable angle of the lumbar support crossbeam 1 and the sliding block 2 around the rotating shaft 32 is 1 / 2α°. It is suitable for users who need a small-stroke lumbar tracking function.

[0051] Preferably, as Figure 14-15 shown: Rotate the adjustment knob 6 until the maximum diameter of the cam 42 abuts against the limiting step three 24. At this time, the limiting rib one 17 contacts the limiting step one 22. At this time, the rotatable angle of the lumbar support crossbeam 1 and the sliding block 2 around the rotating shaft 32 is 0°. It is suitable for users who do not need a lumbar tracking function.

[0052] Preferably, as Figure 16-17 shown: The dovetail groove 25 is connected to the circulating lifting base 81, and the sliding block 2 can move up and down within the range of the circulating lifting base 81; the lumbar support crossbeam 1 is connected to the lumbar support main body 82 through the adaptive elastic member 83. When the lumbar support main body 82 is stressed, it will conduct to the lumbar support crossbeam 1, and the lumbar tracking function of the lumbar support structure is activated.

[0053] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A lumbar support structure with adjustable waist tracking angle, wherein a lumbar support beam (1) and a sliding block (2) are connected via a rotating shaft (32) and a nut (33), characterized in that: include: A compression spring (31), a cam shaft (4), and an adjusting knob (6); the cam shaft (4) penetrates the lumbar support beam (1) and is sleeved with the adjusting knob (6); the compression spring (31) is arranged between the lumbar support beam (1) and the sliding block (2); the lumbar support beam (1) rotates and tilts backwards around the rotating shaft (32) when a force is applied; and the adjusting knob (6) can be rotated to adjust the angle limit of the lumbar support beam (1) rotating and tilting backwards.

2. The lumbar support structure with adjustable waist tracking angle according to claim 1, characterized in that: The waist support cross beam (1) is provided with: a spring installation groove (11), a rotating shaft hole (12), a cam shaft hole (13), a limiting groove (14), a cam shaft hole (15), a limiting boss (16), a limiting rib (17), a limiting rib (18), and a column hole (19); one end of a compression spring (31) is arranged in the spring installation groove (11); a wave ball spring (5) is arranged in the column hole (19); and an elastic ball head (51) is arranged on the end surface of the wave ball spring (5).

3. The lumbar support structure with adjustable waist tracking angle according to claim 2, characterized in that: The sliding block (2) is provided with: a second rotating shaft hole (21), a first limiting step (22), a second limiting step (23), a third limiting step (24), a dovetail groove (25), and a spring installation position (26); the other end of the compression spring (31) is arranged in the spring installation position (26).

4. The lumbar support structure with adjustable waist tracking angle according to claim 3, characterized in that: The rotating shaft (32) passes through the first rotating shaft hole (12) and the second rotating shaft hole (21) and is connected with the nut (33).

5. The lumbar support structure with adjustable waist tracking angle according to claim 3, characterized in that: One end of the camshaft (4) is a camshaft tail (41), the other end of the camshaft (4) is a camshaft end (43), a cam (42) is arranged in the middle section of the camshaft (4), and the cam (42) is provided with a limiting step four (44).

6. The lumbar support structure with adjustable waist tracking angle according to claim 5, characterized in that: The end surface of the adjusting knob (6) connected to the camshaft (4) is provided with: a second limiting groove (61), a third limiting groove (62), and a ball head positioning pit (63); the elastic ball head (51) can be snapped into the ball head positioning pit (63) for positioning; the camshaft end (43) passes through the first camshaft hole (13) and the second camshaft hole (15) in sequence and then is embedded in the third limiting groove (62) and connected to the screw (71); the first limiting boss (16) is embedded in the second limiting groove (61); and the outer end surface of the adjusting knob (6) is connected to the knob cover (72).

7. The lumbar support structure with adjustable waist tracking angle according to claim 6, characterized in that: The adjusting knob (6) is rotated to a position where the limiting step 4 (44) contacts the limiting groove 1 (14). At this time, the smallest diameter of the cam (42) contacts the limiting step 3 (24). At this time, the angle between the limiting rib 1 (17) and the limiting step 1 (22) is α°. Therefore, the rotatable angle between the waist support beam (1) and the sliding block (2) about the rotating shaft (32) is α°.

8. The lumbar support structure with adjustable waist tracking angle according to claim 6, characterized in that: The adjusting knob (6) is rotated until the middle of the diameter of the cam (42) touches the limiting step 3 (24). At this time, the angle between the limiting rib 1 (17) and the limiting step 1 (22) is 1 / 2α°. At this time, the rotatable angle between the waist support beam (1) and the sliding block (2) about the rotating shaft (32) is 1 / 2α°.

9. The lumbar support structure with adjustable waist tracking angle according to claim 6, characterized in that: The adjusting knob (6) is rotated until the cam (42) with the largest diameter contacts the limiting step 3 (24). At this time, the limiting rib 1 (17) contacts the limiting step 1 (22). At this time, the rotatable angle between the waist support beam (1) and the sliding block (2) about the rotating shaft (32) is 0°.

10. The lumbar support structure with adjustable waist tracking angle according to claim 3, characterized in that: The dovetail groove (25) is connected to the cyclic lifting base (81), and the sliding block (2) can perform lifting movement within the range of the cyclic lifting base (81); the waist support cross beam (1) is connected to the waist support body (82) through an adaptive elastic member (83).

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