CN219515751U - Lumbar support adjusting mechanism and swivel chair - Google Patents

Abstract

The utility model belongs to the field of seating furniture, and particularly relates to a lumbar support adjusting mechanism and a swivel chair, which comprise a back connecting part with a plurality of concave-convex locking positions on the outer side, and a lumbar support with a lumbar support connecting part, wherein the lumbar support connecting part is positioned on the outer side of the back connecting part, the lumbar support adjusting mechanism also comprises an operating part which is positioned on the outer side of the lumbar support connecting part and is provided with a lock rod, and an elastic telescopic shaft which is connected with the operating part and is used for hinging the lumbar support connecting part and the back connecting part, and the lock rod penetrates through the lumbar support connecting part and is in concave-convex fit with any concave-convex locking position. The waist rest connecting part can be locked on concave-convex locking positions of different angles by controlling the control part, so that the waist rest can be fixed at a certain angle to adapt to different use requirements. And the control part is acted by the first direction spring to keep the lock rod in a locking state.

Description

Lumbar support adjusting mechanism and swivel chair

Technical Field

The utility model belongs to the field of seats, and particularly relates to a lumbar support adjusting mechanism and a swivel chair.

Background

Seats are widely used in our daily life, and are used for both work and rest, and in order to improve sitting comfort, a lumbar support with a certain elastic deformation capability is arranged at the lumbar position to support the lumbar.

The seat with the waist rest position adjusting function disclosed in the patent CN215015412U comprises a backrest, a sliding block and a waist rest, wherein the middle part of the backrest is provided with a cross beam, a panel is fixed on the cross beam, the sliding block and the panel are of a sliding structure, clamping grooves are formed in the panel along the vertical direction, each clamping groove comprises a plurality of groups of helical teeth on one side, a first storage cavity is formed in the wall surface, close to the panel, of the sliding block, a compression spring and a clamping block are contained in the first storage cavity, the clamping block is provided with a clamping part protruding and extending into the clamping groove, a second storage cavity is formed in the wall surface, far away from the panel, of the sliding block, a fixed shaft is arranged in the second storage cavity, the waist rest is sleeved on the fixed shaft through a sleeving part, a torsion spring is arranged on the fixed shaft, the upper part of the sliding block is fixed with a sealing plate for limiting the upper end of the torsion spring, and the lower end of the torsion spring is propped against the waist rest; the waist of the seat that this scheme relates to is leaned on and can be carried out height and angle regulation, and the user is adjusted according to actual demand, and the waist obtains the support that can be good, and the effect is experienced to the product, and seat waist leans on structural design ingenious, convenient assembling.

In the above scheme, the lumbar support is connected by only one shaft with certain circumferential damping, and swings along with the pressure applied to the lumbar support, but the lumbar support can present different angles along with the change of the pressure applied to the lumbar support, and in essence, the scheme only provides certain elastic support for the lumbar support, and cannot adjust the fixed angle of the lumbar support.

Disclosure of Invention

The present utility model has been made in view of the above problems, and an object of the present utility model is to provide a lumbar support locking mechanism and a lumbar support adjusting mechanism that solve the above problems.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the waist is supported the adjustment mechanism, including the outside have a plurality of unsmooth locking position lean on connecting portion to and have waist of leaning on connecting portion lean on the connecting portion and be located lean on the outside of connecting portion, its characterized in that, waist is supported adjustment mechanism still including being located waist lean on connecting portion outside and have the controlling piece of locking lever, and connect in controlling the piece and with waist lean on connecting portion with lean on connecting portion articulated elasticity telescopic shaft, the locking lever runs through waist lean on connecting portion and with arbitrary unsmooth cooperation of unsmooth locking position.

In the lumbar support adjusting mechanism, a second direction spring is arranged between the lumbar support rear side and the back support connecting part along the thickness direction of the lumbar support.

In the lumbar support adjusting mechanism, one end of the second directional spring is inserted into a second directional cylinder arranged on the backrest connecting part, and the other end of the second directional spring is abutted against the lumbar support.

In the lumbar support adjusting mechanism, the elastic telescopic shaft comprises a shaft rod, one end of the shaft rod is fixed on the operation piece, the shaft rod penetrates through the lumbar support connecting portion and the shaft hole in the back support connecting portion, a first direction spring is sleeved at one end, far away from the operation piece, of the shaft rod, one end of the first direction spring acts on the inner side of the back support connecting portion, and the other end of the first direction spring acts on the shaft rod, far away from the baffle piece at one end of the operation piece.

In the lumbar support adjusting mechanism, a first orientation cylinder is arranged at the outer side of the lumbar support connecting part, an orientation hole for the first orientation cylinder to be inserted is formed in the control part, and the shaft rod penetrates through the first orientation cylinder.

In the lumbar support adjusting mechanism, the diameter of the baffle is larger than that of the shaft hole, and the distance between the baffle and the inner side of the backrest connecting part is larger than the length of the lock rod.

In the lumbar support adjusting mechanism, a through hole for the lock rod to penetrate is arranged on the lumbar support connecting part.

In the lumbar support adjusting mechanism, a waist-shaped groove is arranged at an orifice of one end of the through hole, which is close to the control piece.

In the waist rest adjusting mechanism, the groove width of the waist rest groove is matched with the lock rod, so that one end of the lock rod can slide in an arc shape in the waist rest groove.

The utility model also provides a swivel chair, which comprises the waist rest adjusting mechanism.

The utility model has the advantages that:

the waist rest connecting part can be locked on concave-convex locking positions of different angles by controlling the control part, so that the waist rest can be fixed at a certain angle to adapt to different use requirements. Meanwhile, the operation control is acted by the first direction spring, so that the lock rod is kept in a locking state, and the lock rod is prevented from being withdrawn from the concave-convex locking position accidentally, so that the lumbar support is suddenly lost.

Because the waist-shaped groove is arranged at the position of the through hole, which is close to the orifice of one end of the control piece, the control piece can be pulled outwards and then rotated, so that the lock rod is withdrawn from the concave-convex locking position and is propped against the bottom surface of the waist-shaped groove, and at the moment, the waist rest is unlocked, and various angles can be changed by the force of pressing the waist rest.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a schematic structural view of the control member according to the present utility model.

Fig. 3 is a schematic view of the lumbar support connection structure of the present utility model.

Fig. 4 is a schematic view of the structure of the back connection part of the present utility model.

Fig. 5 is a schematic diagram of the cooperation of the operation member and the lumbar support connecting portion according to the present utility model.

FIG. 6 is a schematic view of the cooperation of the operation member and the backrest connecting portion.

Fig. 7 is a schematic view of the lumbar support and back support connection of the present utility model.

In the drawings, a back connecting part 1, a concave-convex locking position 11, a second orientation cylinder 12, a lumbar support connecting part 2, a first orientation cylinder 21, a through hole 22, a kidney-shaped groove 23, an operation piece 3, a lock rod 31, an orientation hole 32, a second orientation spring 4, a shaft lever 5, a first orientation spring 51, a blocking piece 52, a lumbar support 6 and a shaft hole 7 are shown.

Detailed Description

The following are specific embodiments of the utility model and the technical solutions of the utility model will be further described with reference to the accompanying drawings, but the utility model is not limited to these embodiments.

Example 1

As shown in fig. 1 to 7, the lumbar support adjusting mechanism includes a back support connecting portion 1 having a plurality of concave-convex locking portions 11 on the outer side thereof, and a lumbar support having a lumbar support connecting portion 2, the lumbar support connecting portion 2 being located on the outer side of the back support connecting portion 1, the lumbar support adjusting mechanism further includes an operating piece 3 having a lock lever 31 on the outer side of the lumbar support connecting portion 2, and an elastic telescopic shaft connected to the operating piece 3 and hinging the lumbar support connecting portion 2 and the back support connecting portion 1, the lock lever 31 penetrating the lumbar support connecting portion 2 and being concave-convex fitted with any one of the concave-convex locking portions 11.

That is, the operating member 3 is driven by the external force to separate the lock bar 31 from the current concave-convex locking position 11 and when the lumbar support rotates and drives the lock bar 31 to rotate to the next concave-convex locking position 11, the lock bar 31 is in concave-convex fit with the next concave-convex locking position 11 under the action of the axial restoring elastic force of the elastic telescopic shaft, so that the lumbar support can be fixed at a certain angle.

In the present embodiment, a second direction spring 4 provided along the lumbar thickness direction is provided between the lumbar rear side and the back connecting portion 1. The second direction spring 4 can actively fit the contour of the waist of the user when the waist leans against the unlocked state, thus achieving a certain supporting effect and also achieving the effect of resetting the waist rest when the waist rest angle is adjusted.

Preferably, one end of the second directional spring 4 is inserted into a second directional cylinder 12 provided on the backrest connecting part 1, and the other end of the second directional spring 4 abuts on the lumbar support. The second directional cylinder 12 can keep the second directional spring 4 in a vertical state with the lumbar support as much as possible, so that the spring force of the spring is better acted on the lumbar support, and the spring is prevented from bending when being compressed, so that the spring force cannot be transmitted to the lumbar support.

In this embodiment, the elastic telescopic shaft includes a shaft lever 5 with one end fixed on the operating member 3, the shaft lever 5 penetrates through the shaft holes on the lumbar support connecting portion 2 and the backrest connecting portion 1, a first direction spring 51 is sleeved at one end of the shaft lever 5 far away from the operating member 3, one end of the first direction spring 51 acts on the inner side of the backrest connecting portion 1, and the other end of the first direction spring 51 acts on a blocking member 52 at one end of the shaft lever 5 far away from the operating member 3.

Preferably, the first orientation cylinder 21 is disposed at the outer side of the lumbar support connecting portion 2, the control member 3 is provided with an orientation hole 32 into which the first orientation cylinder 21 is inserted, and the shaft lever 5 penetrates the first orientation cylinder 21. The first orientation cylinder 21 is used as the extension of the shaft hole, so that the shaft lever 5 can obtain a better stabilizing effect, the operation control 3 can be rotated more smoothly, and meanwhile, the first orientation cylinder is used as an abutting piece for the operation control 3 during rotation, and a positioning effect is exerted on the operation control 3.

Preferably, the diameter of the stopper 52 is larger than the diameter of the shaft hole, and the distance between the stopper 52 and the inner side of the back-rest connection portion 1 is larger than the length of the lock lever 31. The large diameter stopper 52 prevents the shaft 5 from being pulled out of the shaft hole by an improper operation, and the lumbar support is dropped, and the pulling distance of the stopper 52 is required to allow the lock lever 31 to be completely withdrawn from the lock hole.

In this embodiment, the lumbar support connecting portion 2 is provided with a through hole 22 through which the lock lever 31 passes. The lock lever 31 penetrates through the through hole 22 to lock the lumbar support at a certain angle.

Preferably, a waist-shaped groove 23 is arranged at an orifice of one end of the through hole 22 close to the control element 3. Because the waist-shaped groove is arranged at the position of the through hole, which is close to the orifice of one end of the control piece, the control piece can be pulled outwards and then rotated, so that the lock rod is withdrawn from the concave-convex locking position and is propped against the bottom surface of the waist-shaped groove, and at the moment, the waist rest is unlocked, and various angles can be changed by the force of pressing the waist rest.

Preferably, the slot width of the slot 23 is matched with the locking bar 31, so that one end of the locking bar 31 can slide in an arc shape in the slot 23. When the control piece 3 drives the lock rod 31 to rotate, the kidney-shaped groove 23 serves as a guide groove of the lock rod 31, so that the lock rod 31 rotates beside the through hole 22, and meanwhile, the kidney-shaped groove 23 can also protect the lock rod 31, so that the lock rod 31 is prevented from being knocked and damaged with the outside.

Example 2

The swivel chair is characterized in that a backrest support is connected to the seat cushion support, a backrest is movably connected to the backrest support, the backrest is movably installed at the lower end of the backrest through a lumbar support adjusting mechanism, and the control piece 3 of the lumbar support adjusting mechanism is just positioned on two sides of the lumbar support, so that a user can operate the swivel chair conveniently when sitting. The lower end of the cushion bracket is sleeved with a rotatable movable bracket, and the movable bracket also has the function of height adjustment.

When the waist rest adjusting function of the swivel chair is used, the control parts 3 at the two ends are pulled outwards to enable the lock rod 31 to withdraw from the through hole 22, at the moment, the waist rest can be adjusted freely, only the waist of a user is attached to the waist rest and adjusted to a comfortable sitting posture, and then the two-end control parts 3 are released to enable the lock rod 31 to be reinserted into the through hole 22, so that the angle of the waist rest is fixed.

After the control parts 3 at two ends are pulled out outwards, the control parts 3 are rotated to enable the lock rod 31 to rotate from the position of the through hole 22 of the kidney-shaped groove 23 to the other end of the kidney-shaped groove 23 far away from the through hole 22, so that the lumbar support adjusting mechanism is always in an unlocked state, at the moment, the lumbar support can be randomly changed in angle along with sitting postures, and the second direction spring 4 is arranged between the lumbar support and the backrest, so that the lumbar support in a free state has certain elasticity to be attached to the waist outline of a user.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims (10)

1. The lumbar support adjusting mechanism comprises a backrest connecting part (1) with a plurality of concave-convex locking positions (11) on the outer side and a lumbar support with a lumbar support connecting part (2), wherein the lumbar support connecting part (2) is positioned on the outer side of the backrest connecting part (1), and the lumbar support adjusting mechanism is characterized by further comprising an operation piece (3) which is positioned on the outer side of the lumbar support connecting part (2) and provided with a lock rod (31), and an elastic telescopic shaft which is connected with the operation piece (3) and used for hinging the lumbar support connecting part (2) with the lumbar support connecting part (1), and the lock rod (31) penetrates through the lumbar support connecting part (2) and is in concave-convex fit with any concave-convex locking position (11).

2. Lumbar support adjustment mechanism according to claim 1, characterized in that a second direction spring (4) is arranged in the lumbar support thickness direction between the lumbar support rear side and the back connection (1).

3. Lumbar support adjustment mechanism according to claim 2, characterized in that one end of the second directional spring (4) is inserted in a second directional cylinder (12) provided on the back support connection (1), the other end of the second directional spring (4) resting on the lumbar support.

4. Lumbar support adjustment mechanism according to claim 1, characterized in that the elastic telescopic shaft comprises a shaft rod (5) with one end fixed on the control piece (3), the shaft rod (5) penetrates through the shaft holes in the lumbar support connection portion (2) and the back support connection portion (1), a first direction spring (51) is sleeved at one end of the shaft rod (5) away from the control piece (3), one end of the first direction spring (51) acts on the inner side of the back support connection portion (1), and the other end of the first direction spring (51) acts on a blocking piece (52) of the shaft rod (5) away from one end of the control piece (3).

5. Lumbar support adjustment mechanism according to claim 4, characterized in that the lumbar support connection (2) is provided on its outer side with a first orientation cylinder (21), the operating member (3) is provided with an orientation hole (32) in which the first orientation cylinder (21) is inserted, the shaft (5) passing through the first orientation cylinder (21).

6. The lumbar support adjustment mechanism of claim 4, wherein the stopper (52) has a diameter greater than the shaft hole diameter, and wherein a distance between the stopper (52) and an inner side of the back connection portion (1) is greater than a length of the lock lever (31).

7. Lumbar support adjustment mechanism according to claim 1, characterized in that said lumbar support connection (2) is provided with a through hole (22) for the passage of said locking bar (31).

8. Lumbar support adjustment mechanism according to claim 7, characterized in that said through hole (22) is provided with a kidney-shaped slot (23) near an end opening of said operating member (3).

9. The lumbar support adjustment mechanism of claim 8, wherein the slot width of the kidney slot (23) is matched to the locking bar (31) such that one end of the locking bar (31) can slide arcuately within the kidney slot (23).

10. Swivel chair, characterized in that it comprises a lumbar adjustment mechanism according to any of claims 1-9.