Waist rest adjusting device

Abstract

The utility model provides a waist rest adjusting device which comprises a waist rest support and an elastic waist rest assembly, a sliding piece is arranged between the waist rest support and the elastic waist rest assembly, and the sliding piece is matched with an adjusting assembly. According to the device, the sliding piece is driven by the adjusting assembly to longitudinally slide on the waist rest support, so that the distance between the upper end and the lower end of the elastic waist rest assembly is changed, the forward arch degree of the elastic waist rest assembly is adjusted, and the adjusted elastic waist rest assembly can effectively support waists at different front and back positions.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to a lumbar support adjusting device. Background Art

[0002] Since the human waist is in a curve that bends forward, some office chairs have an elastic lumbar support at the backrest that can support the waist. The lumbar support is set at the lower end of the chair back and protrudes forward to support the natural curvature of the waist, preventing the waist from bending outward due to fatigue, thereby ensuring the health of the waist of office workers.

[0003] However, in actual use, users have different requirements on the degree of support of the elastic lumbar support under different usage conditions; for example, when the user is working, the body is relatively straight, and the elastic lumbar support needs to be pushed forward a little more to maintain a correct sitting posture; while when the user is lying down to rest, he leans back on the chair back, and at this time, the elastic lumbar support that protrudes forward needs to be retracted partially backward so that the elastic lumbar support can again support the waist that moves backward.

[0004] Therefore, based on the above problems, a lumbar support adjustment device is needed, which can adjust the degree of forward protrusion of the elastic lumbar support according to the needs of the user, so that the lumbar support can always provide stable support for the waist. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide a lumbar support adjustment device, which drives the sliding part to slide longitudinally on the lumbar support bracket through the adjustment component, so that the distance between the upper and lower ends of the elastic lumbar support component is changed, and then the forward arch degree of the elastic lumbar support component is adjusted, so that the adjusted elastic lumbar support component can form effective support for the waist in different front and rear positions.

[0006] The technical solution of the utility model is achieved in this way:

[0007] A lumbar support adjusting device, comprising:

[0008] a lumbar support configured as a support member of the adjustment device;

[0009] An elastic waist support component is arranged at the front end of the waist support bracket, the middle position of the elastic waist support component protrudes forward, and the upper end of the elastic waist support component is connected to the waist support bracket;

[0010] A sliding member is arranged between the lower end of the elastic waist support component and the waist support bracket, the sliding member is longitudinally slidably connected to the waist support bracket, and the sliding member is connected to the lower end of the elastic waist support component;

[0011] The adjusting component can act on the sliding part, so that the sliding part stays at the corresponding position after sliding longitudinally, so as to adjust the front arch degree of the elastic waist support component at the same time.

[0012] Preferably, the adjustment assembly includes a slider that can slide left and right, and a driving member that drives the slider to slide left and right is connected to the slider; a linkage structure is provided between the slider and the sliding member, and the linkage structure can link the sliding member to slide longitudinally on the lumbar support bracket;

[0013] The driving member can drive the slider to slide left and right while triggering the linkage structure, so that the slider can adjust the distance between the upper and lower ends of the elastic lumbar support component by sliding longitudinally, thereby adjusting the degree of the front arch of the elastic lumbar support component itself.

[0014] Preferably, the linkage structure is a slide groove group arranged between the slider and the sliding member, and a slide rod assembly slidably connected in the slide groove group; the slide groove group includes at least two left-right spaced oblique slide grooves on the sliding member, and the slide rod assembly includes at least two left-right spaced slide rods protruding backward from the slider; the slider can slide left-right by itself, driving the slide rod to slide in the oblique slide groove, thereby causing the sliding member to slide longitudinally on the lumbar support bracket; the slide rod can apply an upward component force to the sliding member by squeezing the inner wall of the oblique slide groove, so that the sliding member has a tendency to slide longitudinally.

[0015] Preferably, a longitudinally extending lifting guide groove is provided on the lumbar support bracket, and the sliding member is slidably connected in the lifting guide groove; the lifting guide groove plays a guiding role, allowing the sliding member to slide longitudinally on the lumbar support bracket.

[0016] Preferably, the lumbar support bracket is provided with an avoidance groove extending in the left-right direction, the bottom of the avoidance groove is connected with the lifting guide groove front and back through an avoidance opening, and the two sliding rods at the rear end of the slider pass through the avoidance opening and are inserted into the two oblique sliding grooves of the sliding member; the avoidance groove includes a starting end and an ending end opposite to each other on the left and right, and the driving member can drive the slider to slide between the starting end and the ending end, so that the sliding member can adjust the distance between the upper and lower ends of the elastic lumbar support assembly through longitudinal sliding, and then adjust the degree of the front arch of the elastic lumbar support assembly itself; the avoidance groove and the avoidance opening can provide space for the installation of the slider, and the avoidance groove can also limit the sliding area of ​​the slider, thereby limiting the sliding range of the slider on the lumbar support bracket.

[0017] Preferably, a screw hole is provided on the slider, and the axial direction of the screw hole is the same as the sliding direction of the slider; the driving member is a screw rod spirally fitted in the screw hole, and a handle is connected to the end of the screw rod away from the slider, and the handle drives the screw rod to rotate in place under the action of external force, thereby driving the slider to slide in the left and right directions; the handle controls the screw rod to rotate in place, which is simple and labor-saving, and can make the slider slide quickly to a predetermined position.

[0018] Preferably, the screw includes an outer spiral sleeve spirally fitted in the screw hole, a transmission rod is passed through the outer spiral sleeve, and the handle is connected to the end of the transmission rod; the outer spiral sleeve includes a transmission groove inside itself, and the transmission rod is passed through the transmission groove to drive the outer spiral sleeve to rotate circumferentially; the screw can realize transmission through the plug-in fit of the transmission rod and the transmission groove, with a simple structure and good transmission effect.

[0019] Preferably, the cross-sectional shape of the transmission groove is polygonal, cross-shaped or elliptical, and the cross-sectional shape of the transmission rod matches the cross-sectional shape of the transmission groove; after the transmission rod is inserted into the transmission groove, the two remain relatively fixed in the circumferential direction, thereby achieving effective transmission.

[0020] Preferably, the left and right ends of the lumbar support bracket are provided with shaft holes, and the transmission rod is rotatably connected in the shaft holes to limit the slide bar assembly from escaping from the slide groove group, so that the slide bar and the oblique slide groove cooperate stably.

[0021] Preferably, the inclined sliding groove has an inclination angle of 45° relative to the horizontal plane, so that the left-right sliding distance of the slider and the longitudinal sliding distance of the sliding member are the same, so that the adjustment efficiency of the elastic lumbar support assembly is higher.

[0022] Preferably, the adjustment component includes a gear block connected to the sliding member, and the lumbar support bracket is provided with a plurality of gear slots evenly distributed along the longitudinal direction. The gear block is provided with a limiting member that can elastically extend and retract toward the gear slot, and the limiting member is stuck in one of the gear slots; the gear block can drive the sliding member to slide longitudinally under the action of external force, and the limiting member can switch from one of the gear slots to another gear slot while elastically extending and retracting, so that the sliding member stays in the corresponding position after sliding longitudinally.

[0023] The principle and beneficial effects of the utility model using the above technical solution are:

[0024] The utility model provides a lumbar support adjustment device, which drives a sliding part to slide longitudinally on a lumbar support bracket through an adjustment component, so that the distance between the upper and lower ends of the elastic lumbar support component is changed, thereby adjusting the forward arch degree of the elastic lumbar support component; when the waist of the seated person moves forward or backward, the adjustment component can adjust the forward arch degree of the elastic lumbar support component, so that the elastic lumbar support component can always fit the waist of the seated person and form effective support for the waist whose front and rear position changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an enlarged view of the adjustment component on the lumbar adjustment device;

[0026] Figure 2 An exploded view of the lumbar support adjustment device;

[0027] Figure 3 This is an exploded view of the lumbar support adjustment device from another angle;

[0028] Figure 4 It is a schematic diagram of the structure of the lumbar support bracket, the sliding member and the slider;

[0029] Figure 5a A side view showing the middle portion of the elastic waist support assembly protruding forward;

[0030] Figure 5b A side view showing the middle portion of the elastic waist support assembly being pushed forward further;

[0031] Figure 6 It is a schematic diagram of the structure of the transmission rod and the outer spiral sleeve;

[0032] Figure 7 It is a schematic diagram of the structure of the adjustment component in Example 2;

[0033] The figures are marked as follows: 1-lumbar support bracket, 2-elastic lumbar support assembly, 3-sliding member, 4-sliding block, 5-outer spiral sleeve, 6-screw, 7-protective cover, 8-back support, 9-limiting member, 10-spring, 11-lifting guide groove, 12-avoidance groove, 12a-avoidance mouth, 13-rotating shaft hole, 21-lumbar support plate, 22-lumbar support mounting frame, 31-oblique slide groove, 32-bending end, 41-screw hole, 42-spiral groove, 43-sliding rod, 51-transmission groove, 61-transmission part, 62-handle, 71-gear groove, 72-gear block, 73-accommodating groove, 121-starting end, 122-ending end. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0036] like Figure 1-7 As shown, the utility model has multiple implementation modes, and the specific implementation modes are as follows:

[0037] Example 1: Figure 1-6 As shown, the utility model provides a lumbar adjustment device, which is installed at the front end of the back support 8 and includes:

[0038] A lumbar support bracket 1, configured as a support member of the adjustment device;

[0039] The elastic waist support component 2 is arranged at the front end of the waist support bracket 1, the middle position of the elastic waist support component 2 protrudes forward, and the upper end of the elastic waist support component 2 is connected to the waist support bracket 1; the elastic waist support component 2 includes a waist support mounting frame 22 and two waist support plates 21 symmetrically mounted on the waist support mounting frame 22;

[0040] The sliding member 3 is arranged between the lower end of the elastic waist support component 2 and the waist support bracket 1. The sliding member 3 is longitudinally slidably connected to the waist support bracket 1, and the sliding member 3 is connected to the lower end of the elastic waist support component 2;

[0041] The adjusting component can act on the sliding member 3 to make the sliding member 3 stay at the corresponding position after sliding longitudinally, so as to adjust the front arch degree of the elastic waist support component 2 at the same time.

[0042] Furthermore, the sliding member 3 includes a bending end 32 extending forward and downward from its lower end, and the elastic lumbar support component 2 is connected to the bending end 32; the upper end of the elastic lumbar support component 2 is fixedly connected to the upper end of the sliding member 3, and the lower end of the elastic lumbar support component 2 is rotationally connected to the bending end 32 along the front-to-back direction. When the sliding member 3 slides, the rotationally connected bending end 32 can drive the elastic lumbar support component 2 to produce elastic deformation along the longitudinal direction. The rotational connection method can also avoid the elastic lumbar support component 2 and the bending end 32 from generating large concentrated stress during elastic deformation, thereby allowing the elastic lumbar support component 2 to maintain good structural strength.

[0043] Furthermore, the adjustment assembly includes a slider 4 that can slide left and right, and a driving member that drives the slider 4 to slide left and right is connected to the slider 4; a linkage structure is provided between the slider 4 and the sliding member 3, and the linkage structure can link the sliding member 3 to slide longitudinally on the lumbar support bracket 1;

[0044] The driving member can drive the slider 4 to slide left and right while triggering the linkage structure, so that the slider 3 can adjust the distance between the upper and lower ends of the elastic lumbar support component 2 by sliding longitudinally, thereby adjusting the degree of the front arch of the elastic lumbar support component 2 itself.

[0045] Furthermore, the linkage structure is a slide groove group arranged between the slider 4 and the sliding member 3, and a slide rod assembly slidably connected in the slide groove group; the slide groove group includes at least two left-right spaced oblique slide grooves 31 on the sliding member 3, and the slide rod 43 assembly includes at least two left-right spaced slide rods 43 protruding backward from the slider 4; the slider 4 can slide left-right by itself, driving the slide rod 43 to slide in the oblique slide groove 31, so that the sliding member 3 slides longitudinally on the lumbar support bracket 1; the slide rod 43 can apply an upward moving component force to the sliding member 3 by squeezing the inner wall of the oblique slide groove 31, so that the sliding member 3 has a tendency to slide longitudinally.

[0046] Furthermore, a longitudinally extending lifting guide groove 11 is provided on the lumbar support bracket 1, and the sliding member 3 is slidably connected in the lifting guide groove 11; the lifting guide groove 11 plays a guiding role, allowing the sliding member 3 to slide longitudinally on the lumbar support bracket 1.

[0047] Further, if Figure 4As shown, in order to facilitate the installation and sliding limit of the slider 4, an avoidance groove 12 extending in the left and right directions is provided on the lumbar support bracket 1. The bottom of the avoidance groove 12 is connected to the lifting guide groove 11 front and back through an avoidance opening 12a. The two slide rods 43 at the rear end of the slider 4 pass through the avoidance opening 12a and are inserted into the two oblique slide grooves 31 of the sliding member 3; the avoidance groove 12 includes a starting end 121 and an ending end 122 opposite to each other on the left and right. The driving member can drive the slider 4 to slide between the starting end 121 and the ending end 122, so that the sliding member 3 can adjust the distance between the upper and lower ends of the elastic lumbar support component 2 through longitudinal sliding, and then adjust the size of the front arch of the elastic lumbar support component 2 itself; the avoidance groove 12 and the avoidance opening 12a can provide space for the installation of the slider 4. The avoidance groove 12 can also limit the sliding area of ​​the slider 4 and the sliding range of the sliding member 3 on the lumbar support bracket 1, so that the sliding member 3 is always in the lifting guide groove 11 to prevent the sliding member 3 from sliding out of the lifting guide groove 11.

[0048] Further, if Figure 1-3 As shown, a screw hole 41 is provided on the slider 4, and a spiral groove 42 is provided in the screw hole 41. The axial direction of the screw hole 41 is the same as the sliding direction of the slider 4. The driving member is a screw rod 6 which is spirally fitted in the screw hole 41. The end of the screw rod 6 which is away from the slider 4 is connected with a handle 62. The handle 62 drives the screw rod 6 to rotate in situ under the action of an external force, so as to drive the slider 4 to slide in the left and right directions. The way in which the handle 62 controls the screw rod 6 to rotate in situ is simple and labor-saving, and the slider 4 can slide quickly to a predetermined position. After the slider 4 slides to the predetermined position in the left and right directions, the screw rod 6 can limit the reverse sliding of the slider 4 which is spirally fitted with the screw rod 6, so that the elastic lumbar support assembly 2 stops elastic deformation and remains stable.

[0049] Furthermore, the screw 6 includes an outer spiral sleeve 5 spirally fitted in the screw hole 41, a transmission rod 61 is passed through the outer spiral sleeve 5, and a handle 62 is connected to the end of the transmission rod 61; the transmission rod 61 is passed through the transmission groove 51 to drive the outer spiral sleeve 5 to rotate circumferentially; the screw 6 can realize transmission through the plug-in fit of the transmission rod 61 and the transmission groove 51, with a simple structure, easy installation and good transmission effect.

[0050] Furthermore, the outer spiral sleeve 5 includes a transmission groove 51 inside itself. In order to enable the transmission rod 61 and the outer spiral sleeve 5 to be circumferentially fixed to achieve effective transmission, the cross-sectional shape of the transmission groove 51 is polygonal (not shown) or cross-shaped or elliptical (not shown), and the cross-sectional shape of the transmission rod 61 matches the cross-sectional shape of the transmission groove 51.

[0051] Furthermore, the slide bar 43 is inserted into the oblique slide groove 31 along the front-to-back direction. Therefore, in order to limit the separation of the slide bar 43 from the oblique slide groove 31, the left and right ends of the lumbar support bracket 1 are provided with a shaft hole 13, and the transmission rod 61 is rotatably connected in the shaft hole 13; when the transmission rod 61 rotates along its own axis, the slide bar assembly can be limited from escaping from the slide groove group.

[0052] Furthermore, both ends of the transmission rod 61 are rotatably connected in the shaft hole 13, and the handle 62 is exposed at the side end of the lumbar support bracket 1. A protective cover 7 is provided in the shaft hole 13 on the side opposite to the handle 62. The protective cover 7 can cover the end of the transmission rod 61, so that the appearance of the entire lumbar support adjustment device is simple and coordinated.

[0053] Furthermore, the slide rod 43 applies a longitudinal sliding force to the sliding member 3 by squeezing the inner wall of the oblique slide groove 31, so that the sliding member 3 slides longitudinally. Therefore, the inclination angle of the oblique slide groove 31 relative to the horizontal plane should be maintained within a reasonable range. In this embodiment, the angle of the oblique slide groove 31 is 45°. Therefore, the ratio of the lateral sliding length of the slider 4 and the longitudinal sliding length of the sliding member 3 is one. That is to say, when the slide rod 43 squeezes the inner wall of the 45° oblique slide groove 31, the longitudinal displacement of the sliding member 3 and the lateral displacement of the slider 4 are the same. At this time, when the handle 62 is turned to drive the slider 4 to slide, the elastic deformation of the elastic lumbar support assembly 2 is faster, so that the elastic lumbar support assembly 2 can be quickly adjusted into place.

[0054] Example 2: Figure 7 As shown, the difference between this embodiment and embodiment 1 is that another structure of an adjustment component is provided in this embodiment, the adjustment component includes a shift block 72 connected to the sliding member 3, a plurality of shift grooves 71 evenly distributed along the longitudinal direction are provided on the lumbar support bracket 1, the shift groove 71 is a hemispherical groove, the shift block 72 is provided with a receiving groove 73, the receiving groove 73 is provided with a limiting member 9 that can elastically extend toward the shift groove 71, the limiting member 9 is a ball, the ball includes a hemispherical surface that exposes the opening of the receiving groove 73, the receiving groove 73 is provided with a spring 10 that abuts against the limiting member 9, and the spring 10 can be the limiting member 9 Provide elastic force for elastic expansion and contraction; the hemispherical surface of the limit member 9 is stuck in one of the hemispherical gear slots 71; the gear block 72 can drive the sliding member 3 to slide longitudinally under the action of external force, and make the limit member 9 elastically expand and contract while switching from one of the gear slots 71 to another gear slot 71, so that the sliding member 3 stays in the corresponding position after longitudinal sliding; in this embodiment, the gear block 72 is manually acted on to make the sliding member 3 slide longitudinally, so that the elastic lumbar support component 2 produces elastic deformation, and the degree of the front arch of the elastic lumbar support component 2 is adjusted, thereby achieving the same adjustment effect as in Example 1.

[0055] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A lumbar support adjustment device, characterized in that: include: A lumbar support bracket (1) configured as a support member of the adjustment device; An elastic waist support component (2) is arranged at the front end of the waist support bracket (1), the middle position of the elastic waist support component (2) protrudes forward, and the upper end of the elastic waist support component (2) is connected to the waist support bracket (1); A sliding member (3) is arranged between the lower end of the elastic lumbar support component (2) and the lumbar support bracket (1), the sliding member (3) is longitudinally slidably connected to the lumbar support bracket (1), and the sliding member (3) is connected to the lower end of the elastic lumbar support component (2); The adjusting component can act on the sliding member (3) to make the sliding member (3) stay at a corresponding position after sliding longitudinally, so as to simultaneously adjust the forward arch degree of the elastic waist support component (2).

2. A lumbar support adjustment device according to claim 1, characterized in that: The adjustment component comprises a slider (4) which can slide leftward and rightward, and a driving member which drives the slider (4) to slide leftward and rightward is connected to the slider (4); a linkage structure is provided between the slider (4) and the sliding member (3), and the linkage structure can link the sliding member (3) to slide longitudinally on the lumbar support bracket (1); The driving member can drive the slider (4) to slide left and right and trigger the linkage structure at the same time, so that the slider (3) can adjust the distance between the upper and lower ends of the elastic waist support component (2) by sliding longitudinally, thereby adjusting the degree of the front arch of the elastic waist support component (2).

3. A lumbar support adjustment device according to claim 2, characterized in that: The linkage structure comprises a slide groove group arranged between the slider (4) and the sliding member (3), and a slide rod assembly slidably connected in the slide groove group; the slide groove group comprises at least two oblique slide grooves (31) spaced apart from each other on the sliding member (3); the slide rod (43) assembly comprises at least two oblique slide rods (43) protruding backward from the slider (4) and spaced apart from each other; the slider (4) can slide left and right by itself, thereby driving the slide rod (43) to slide in the oblique slide groove (31), thereby causing the sliding member (3) to slide longitudinally on the lumbar support bracket (1).

4. A lumbar support adjustment device according to claim 3, characterized in that: A longitudinally extending lifting guide groove (11) is provided on the lumbar support bracket (1), and the sliding member (3) is slidably connected in the lifting guide groove (11).

5. A lumbar support adjustment device according to claim 4, characterized in that: The lumbar support bracket (1) is provided with an avoidance groove (12) extending in the left-right direction. The groove bottom of the avoidance groove (12) is connected to the lifting guide groove (11) front-to-back through an avoidance opening (12a). Two slide bars (43) at the rear end of the slider (4) pass through the avoidance opening (12a) and are inserted into two oblique slide grooves (31) of the sliding member (3). The avoidance groove (12) includes a starting end (121) and an ending end (122) opposite to each other on the left and right. The driving member can drive the slider (4) to slide between the starting end (121) and the ending end (122), thereby causing the sliding member (3) to drive and adjust the distance between the upper and lower ends of the elastic lumbar support component (2) through longitudinal sliding, thereby adjusting the degree of the front arch of the elastic lumbar support component (2).

6. A lumbar support adjustment device according to claim 3, characterized in that: The slider (4) is provided with a screw hole (41), and the axial direction of the screw hole (41) is the same as the sliding direction of the slider (4); the driving member is a screw rod (6) screwed into the screw hole (41), and the end of the screw rod (6) away from the slider (4) is connected to a handle (62), and the handle (62) drives the screw rod (6) to rotate in place under the action of an external force, thereby driving the slider (4) to slide in the left-right direction.

7. A lumbar support adjustment device according to claim 6, characterized in that: The screw rod (6) comprises an outer screw sleeve (5) screwed into the screw hole (41), a transmission rod (61) is inserted into the outer screw sleeve (5), and a handle (62) is connected to the end of the transmission rod (61); the outer screw sleeve (5) comprises a transmission groove (51) inside the outer screw sleeve, and the transmission rod (61) is inserted into the transmission groove (51) to drive the outer screw sleeve (5) to rotate in a circumferential direction.

8. A lumbar support adjustment device according to claim 7, characterized in that: The cross-sectional shape of the transmission groove (51) is polygonal, cross-shaped or elliptical, and the cross-sectional shape of the transmission rod (61) matches the cross-sectional shape of the transmission groove (51).

9. The lumbar support adjustment device according to claim 7, characterized in that: The left and right ends of the lumbar support bracket (1) are provided with rotating shaft holes (13), and the transmission rod (61) is rotatably connected in the rotating shaft holes (13) to prevent the slide bar assembly from falling out of the slide groove group.

10. The lumbar support adjustment device according to claim 2, characterized in that: The inclined chute (31) has an inclination angle of 45° relative to the horizontal plane.

11. The lumbar support adjustment device according to claim 1, characterized in that: The adjustment component comprises a shift block (72) connected to the sliding member (3); the lumbar support bracket (1) is provided with a plurality of shift slots (71) evenly distributed in the longitudinal direction; the shift block (72) is provided with a limiter (9) which can elastically extend and retract toward the shift slots (71); the limiter (9) is stuck in one of the shift slots (71); the shift block (72) can drive the sliding member (3) to slide longitudinally under the action of an external force, and the limiter (9) can be elastically extended and retracted while switching from one of the shift slots (71) to another of the shift slots (71), thereby causing the sliding member (3) to stay at a corresponding position after sliding longitudinally.

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