Chair with waist rest adjusting device

Abstract

A chair with a waist rest adjusting device is characterized in that an adjusting bin is arranged in a chair seat, a waist rest is installed at the upper end of a supporting rod, the lower end of the supporting rod is connected with an adjusting rod, the adjusting rod extends into the adjusting bin and is connected with a sliding block, and when the waist rest needs to be adjusted, a lead screw is driven by a driver to rotate, and the lead screw drives the sliding block to move in the setting direction of the adjusting bin through an adjusting nut; therefore, the supporting rod and the waist rest are sequentially driven to move, and adjustment is achieved. The chair with the waist rest adjusting device is stable in adjustment, high in precision and capable of effectively ensuring the riding comfort, reducing the cost and prolonging the service life.

Description

Technical Field

[0001] The utility model relates to a chair, in particular to a device for driving a waist support on the chair to adjust its position. Background Art

[0002] Traditional chairs include a seat for sitting, legs installed at the bottom of the seat, and a backrest installed at the back of the seat; with the continuous development of technology and the improvement of people's usage requirements, the design of chairs needs to be more ergonomic to improve the comfort of use. These chairs are generally also equipped with headrests, shoulder pillows, lumbar supports and other components to support different parts of the human body. The lumbar support is installed on the backrest or seat of the chair. Although it can provide support for the human waist, the fixed installation makes it unsuitable for different user groups, which seriously affects the comfort of use; some chairs are equipped with adjustable lumbar supports, but they need to be supported by the backrest, and the adjustment range is limited. Utility Model Content

[0003] The utility model aims to provide a lumbar support adjusting device which has a large adjustment range and is convenient to adjust.

[0004] The chair with a lumbar support adjustment device described in the utility model comprises a chair back, a lumbar support, a seat and a support rod; the lumbar support and the chair back are arranged separately, and the seat is provided with an adjustment compartment; one end of the support rod is connected to the lumbar support, and the other end is inserted into the adjustment compartment, and an adjustment mechanism for driving the support rod to move is provided in the adjustment compartment.

[0005] Furthermore, the support rod comprises a rod body and a rod seat, the rod body is in a C-shape with the middle portion bent backwards; a guide groove is opened on the back side of the seat, the rod seat is placed in the guide groove and moves along the guide groove.

[0006] Furthermore, the upper and lower ends of the rod body are hinged to the lumbar support and the rod seat respectively; the end of the rod seat away from the rod body is connected to an adjustment rod, and the end of the adjustment rod away from the rod seat passes through the outer wall of the seat and extends into the adjustment chamber to be fixedly connected to the slider.

[0007] Furthermore, the adjustment chamber is arranged inside the seat; the adjustment mechanism includes a screw rod, a driver for controlling the rotation of the screw rod, and an adjustment nut cooperating with the screw rod, the adjustment nut is fixedly arranged on the slider, and the slider is connected to the support rod.

[0008] Furthermore, an adjustment box with a top opening is fixedly installed in the adjustment compartment of the seat, a slider is arranged in the adjustment box, two adjustment rods are respectively arranged on both sides of the adjustment box, and there is an adjustment plate that simultaneously connects the two adjustment rods and the slider, and the adjustment plate is provided with guide grooves that limit and guide each other with the two side edges of the top surface of the adjustment box.

[0009] Furthermore, the horizontal height of the two adjustment rods is lower than the top edge of the adjustment box, the adjustment plate is located at the opposite sides of the outer walls of the adjustment box, bent downward and connected to the adjustment rods, and the bending position of the adjustment plate is a guide groove.

[0010] Furthermore, a guide hole is provided in the sliding block, and a guide rod is fixedly installed in the seat, and the middle part of the guide rod passes through the guide hole.

[0011] Furthermore, a rod sleeve or a linear bearing is provided in the guide hole of the slider, and the guide rod is arranged through the rod sleeve.

[0012] Furthermore, the driver includes a motor installed in the seat and connected to the screw rod, and a controller installed on the side of the outer wall of the seat, and the controller controls the operation of the motor through circuits or wireless signals.

[0013] The chair with a lumbar support adjustment device described in the utility model has an adjustment chamber set in the seat, and the parts required to drive the lumbar support are hidden in the adjustment chamber to protect the parts. At the same time, the space in the seat can be more fully utilized, and the aesthetics of the chair can be improved. The lumbar support is installed on the upper end of the support rod, and the lower end is inserted into the adjustment chamber and connected to the adjustment mechanism. The adjustment mechanism drives the support rod to move forward and backward, and then drives the lumbar support to achieve forward and backward adjustment. This chair with a lumbar support adjustment device can not only better protect the parts, but also the position and size of the adjustment chamber can be more conveniently adjusted, thereby achieving more stable and larger range of adjustment, and can also better ensure the comfort of riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a chair with a lumbar adjustment device.

[0015] Figure 2 , 3 It is a schematic diagram of the connection structure of the lumbar support, the support rod and the seat.

[0016] Figure 4 It is a schematic diagram of the structure of the back of the seat.

[0017] Figure 5-8 It is a schematic diagram of the internal structure of a chair with a lumbar adjustment device. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] If there are descriptions involving "first" or "second" in the embodiments of the utility model, the descriptions of "first" or "second" are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0021] The utility model provides a chair with a lumbar support adjusting device.

[0022] The chair with a lumbar support adjustment device of this embodiment includes a support rod 2 with a lumbar support 1 installed and a seat 3 for sitting; a hollow adjustment chamber is provided in the seat, one end of the support rod is connected to the lumbar support, and the other end is inserted into the adjustment chamber, and an adjustment mechanism for driving the support rod to move is provided in the adjustment chamber.

[0023] The adjusting chamber is provided with a driver and a movable slider 5, the driver is connected with a screw rod 6, and an adjusting nut 7 screwed with the screw rod is fixedly mounted on the slider; an adjusting rod 8 is connected to the support rod, and one end of the adjusting rod passes through the outer wall of the seat and extends into the adjusting chamber to be connected with the slider.

[0024] The chair with a lumbar support adjustment device is provided with an adjustment chamber in the seat, and the components required to drive the lumbar support are hidden in the adjustment chamber to protect the components. At the same time, the space in the seat can be more fully utilized and the aesthetics of the chair can be improved. The lumbar support is installed on the upper end of the support rod and the lower end is connected to the adjustment rod. The adjustment rod extends into the adjustment chamber and is connected to the slider. When the lumbar support needs to be adjusted, the driver drives the lead screw to rotate, and the lead screw drives the slider to move along the setting direction of the adjustment chamber through the adjustment nut, thereby driving the support rod and the lumbar support to move in turn, thereby achieving adjustment.

[0025] The chair with a lumbar adjustment device, the support rod 2 includes a rod body 21 connected to the lumbar support 1, and a rod seat 22 connected to the adjustment rod 8, the upper and lower ends of the rod body are respectively hinged to the lumbar support and the rod seat, so that the lumbar support can be better adapted to the human body when the position is changed. The rod body 21 is a C-shaped rod with the middle part bent backward, which has a more technological sense and can also avoid obstruction to the human body; at the same time, a guide groove 31 is opened on the back side of the seat 3, and the rod seat 22 is arranged in the guide groove and moves along the guide groove, which can form a limit and guide, improve the stability of the adjustment and the structural strength between the components, and can also better hide the rod seat and improve the aesthetics.

[0026] In the chair with lumbar adjustment device, an adjustment box 9 with a top opening is fixedly installed in the adjustment chamber of the seat 3, a slider 5 is arranged in the adjustment box, two adjustment rods 8 are arranged on both sides of the adjustment box, and an adjustment plate 10 is connected to the two adjustment rods and the slider at the same time. The adjustment plate is provided with guide grooves for limiting and guiding the two sides of the top surface of the adjustment box; the adjustment box can place and protect the moving parts on the one hand, and cooperate with the adjustment plate with the top edge as a guide rail on the other hand, so as to improve the structural stability and adjustment accuracy. In addition, a box cover 11 covering the top opening of the adjustment box 9 is installed in the seat 3 to further protect the parts. In addition, the horizontal height of the two adjustment rods 8 is lower than the top edge of the adjustment box 9, and the adjustment plate 10 is located at the opposite sides of the outer wall of the adjustment box and is bent downward and connected to the adjustment rod. The bending position of the adjustment plate is the guide groove. The structure of this type of adjustment plate is simpler and can more effectively utilize the space in the seat.

[0027] The chair with a lumbar adjustment device, the slider 5 includes two slider bodies that are arranged opposite to each other and detachably connected to each other to facilitate assembly and disassembly; the adjusting nut 7 is fixedly installed in the slider 5, that is, at the opposite sides of the two slider bodies, and the screw rod 6 passes through the slider and is threadedly connected to the adjusting nut. This structure can improve the connection strength and adjustment stability; at the same time, a guide hole is also provided in the slider 5, and the guide hole is formed by the semicircular grooves on the opposite sides of the two slider bodies, and there is a guide rod 12 fixedly installed in the seat 3, and the middle part of the guide rod passes through the guide hole, thereby providing a more stable guide for the movement of the slider; and a rod sleeve 13 or a linear bearing can also be provided in the guide hole of the slider 5, and the guide rod 12 is arranged through the rod sleeve, thereby reducing the friction of relative movement.

[0028] The driver of the chair with lumbar adjustment device includes a motor 41 installed in the seat 3 and connected to the screw rod 6, and a controller 42 installed on the side of the outer wall of the seat. The controller controls the operation of the motor through circuits or wireless signals to improve the convenience of operation.

[0029] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A chair with a lumbar support adjustment device, comprising a chair back, a lumbar support (1) and a chair seat (3), characterized in that: The chair also includes a support rod; the lumbar support and the chair back are arranged separately, and an adjustment chamber is arranged on the seat (3); one end of the support rod is connected to the lumbar support (1), and the other end is inserted into the adjustment chamber, and an adjustment mechanism for driving the support rod to move is arranged in the adjustment chamber; the adjustment mechanism includes a screw rod (6), a driver for controlling the rotation of the screw rod (6), and an adjustment nut (7) matched with the screw rod (6), and the adjustment nut (7) is fixedly arranged on a slider (5), and the slider (5) is connected to the support rod.

2. The chair with a lumbar adjustment device according to claim 1, characterized in that: The adjustment chamber is arranged inside the seat (3).

3. The chair with a lumbar adjustment device according to claim 1, characterized in that: The support rod comprises a rod body (21) and a rod seat (22), the upper and lower ends of the rod body (21) being hinged to the lumbar support (1) and the rod seat (22) respectively; one end of the rod seat (22) away from the rod body (21) is connected to an adjustment rod (8), and one end of the adjustment rod (8) away from the rod seat (22) passes through the outer wall of the seat (3) and extends into the adjustment chamber to be fixedly connected to the slider (5).

4. The chair with a lumbar adjustment device according to claim 3, characterized in that: The rod body (21) is in a C-shape with the middle portion bent backwards.

5. The chair with a lumbar adjustment device according to claim 3, characterized in that: A guide groove (31) is formed on the back side of the seat (3), and the rod seat (22) is arranged in the guide groove (31) and moves along the guide groove (31).

6. The chair with a lumbar adjustment device according to any one of claims 1 to 5, characterized in that: An adjustment box (9) with a top opening is fixedly installed in the adjustment chamber of the seat (3), a slider (5) is arranged in the adjustment box (9), two adjustment rods (8) are respectively arranged on both sides of the adjustment box (9), and an adjustment plate (10) is also provided which is connected to the two adjustment rods (8) and the slider (5), and the adjustment plate (10) is provided with guide grooves which are mutually limited and guided with the two side edges of the top surface of the adjustment box (9).

7. The chair with a lumbar adjustment device according to claim 5, characterized in that: The horizontal heights of the two adjustment rods (8) are lower than the top edge of the adjustment box (9); the adjustment plate (10) is located at opposite positions of the outer walls of both sides of the adjustment box (9), is bent downward and is connected to the adjustment rods (8); and the bending position of the adjustment plate (10) is a guide groove.

8. The chair with a lumbar adjustment device according to claim 7, characterized in that: A guide hole is provided in the slider (5), and a guide rod (12) is fixedly installed in the seat (3), and the middle part of the guide rod (12) passes through the guide hole.

9. The chair with a lumbar adjustment device according to claim 8, characterized in that: A rod sleeve (13) or a linear bearing is arranged in the guide hole of the slide block (5), and the guide rod (12) is arranged through the rod sleeve (13).

10. The chair with a lumbar adjustment device according to claim 2, characterized in that: The driver comprises a motor (41) installed in the seat (3) and connected to the screw rod (6), and a controller (42) installed on the side of the outer wall of the seat (3). The controller (42) controls the operation of the motor (41) through a circuit or a wireless signal.

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