Waist support assembly and seat

Abstract

The utility model discloses a waist support assembly and a seat, the waist support assembly comprises a support, a back plate, a flexible support block and an adjusting mechanism, the back plate is hinged on the support; the adjusting mechanism comprises an air spring, a switch and a shifting piece, the air spring comprises a cylinder body, a piston rod and a button arranged on the piston rod, and the button is used for enabling the piston rod and the cylinder body to move relatively when being pressed and enabling the piston rod and the cylinder body to be fixed relatively when being loosened; the cylinder body is hinged to the back plate. The piston rod is hinged to the support. The shifting piece is movably connected to a piston rod of the gas spring, and the switch is used for driving the shifting piece to move relative to the piston rod between a first position where the button is pressed and a second position where the button is released. According to the utility model, stepless adjustment can be carried out, so that the position of the flexible supporting block can be accurately adjusted to a required position, and the flexible supporting block has a relatively large adjustment stroke.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seat, specifically relates to a waist support subassembly and seat. BACKGROUND

[0002] The existing office seats, epro seats and the like are usually provided with a waist support subassembly, and an adjustable waist support is arranged on the waist support subassembly, which is used to provide support to the waist of a user at different positions, so that the seat can adapt to users of different heights and different sitting postures. When adjusting the position of the waist support of the existing seat, the waist support is kept fixed through the way of clamping cooperation to provide stable support to the waist of the user, but the way of clamping cooperation needs to be spaced apart by a certain distance between adjacent gears, which results in that the position of the waist support cannot be adjusted steplessly, and it is difficult for the user to adjust the waist support to a better support position; and the size of the internal adjusting structure of the waist support subassembly is limited due to the size limitation of the waist support subassembly, which results in a small adjusting stroke and a limited application range of the seat. SUMMARY

[0003] The utility model aims at providing a waist support subassembly and seat, which can realize stepless adjustment of the waist support and have a relatively large adjusting stroke.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The waist support subassembly comprises a support fixedly connected to a seat back or a seat cushion, a back plate located at the front side of the support, a flexible support block connected to the front side of the back plate, and an adjusting mechanism. The back plate is hinged to the support so that the back plate can rotate relative to the support about a first axis.

[0006] The adjusting mechanism comprises an air spring, a switch, and a shifting piece. The air spring comprises a cylinder, a piston rod, and a button arranged on the piston rod. The button is used to make the piston rod and the cylinder relatively movable when being pressed, and relatively fixed when being released. The cylinder is hinged to the back plate so that the cylinder can rotate relative to the back plate about a second axis. The second axis is parallel to the first axis and staggered with the first axis. The piston rod is hinged to the support. The shifting piece is movably connected to the piston rod of the air spring. The switch is used to drive the shifting piece to move relative to the piston rod between a first position of pressing the button and a second position of releasing the button.

[0007] Preferably, the piston rod of the air spring is provided with a mounting seat, and the shifting piece is pivoted to the mounting seat so that the shifting piece can rotate relative to the piston rod between the first position and the second position.

[0008] Preferably, the piston rod of the gas spring extends downward from the bottom of the cylinder body, and the button is arranged on the lower end face of the piston rod; the mounting seat is provided with a receiving cavity and a connecting hole, the actuating member is arranged in the receiving cavity, the connecting hole extends downward from the top face of the mounting seat to the receiving cavity, the piston rod of the gas spring is connected in the connecting hole from top to bottom to fix the piston rod and the mounting seat together, and the button on the lower end face of the piston rod extends into the receiving cavity through the mounting hole and is arranged above the actuating member.

[0009] Preferably, the bracket is fixedly connected with a lower connecting seat, and the mounting seat is connected with the lower connecting seat through the first pair of lock screws to pivotally connect the piston rod and the bracket together.

[0010] Preferably, the actuating member comprises a pivoting end pivotally connected with the mounting seat and a connecting end opposite to the pivoting end, and a part of the actuating member between the pivoting end and the connecting end forms a pressing part matched with the button; the adjusting mechanism further comprises a pull rope, one end of the pull rope is connected with the connecting end of the actuating member, and the other end of the pull rope is connected with the switch.

[0011] Preferably, the actuating member is arranged below the button, the connecting end is a hook, one end of the pull rope passes through the hook from top to bottom, and the one end of the pull rope is connected with a connecting column clamped below the hook.

[0012] Preferably, the switch comprises a base fixed on the bracket and a wrench pivotally connected with the base, and the other end of the pull rope is connected with the wrench; an outer flexible sleeve is arranged on the pull rope, and two ends of the flexible sleeve are fixedly connected with the piston rod of the gas spring and the base of the switch respectively.

[0013] Preferably, the bracket is fixedly connected with an upper connecting seat, the back face of the back plate is fixedly connected with a rotating seat, the rotating seat is pivotally connected with the upper connecting seat through a rotating shaft to hinge the back plate and the bracket together, and the central axis of the rotating shaft is a first axis; the top of the cylinder body of the gas spring is connected with the rotating seat through a second pair of lock screws to hinge the back plate and the cylinder body together, and the central axis of the second pair of lock screws is a second axis.

[0014] Preferably, the piston rod of the gas spring is provided with the mounting seat, the mounting seat is provided with a sliding groove extending in a straight line, and the actuating member is arranged in the sliding groove to enable the actuating member to move relative to the piston rod between the first position and the second position.

[0015] The seat comprises the waist support assembly.

[0016] Compared with the prior art, the seat has the beneficial effects that:

[0017] The utility model discloses, because the piston rod of gas spring can be fixed with cylinder body in any position in the process of moving relative to cylinder body, thereby, when the angle of backboard is adjusted, backboard can be fixed in any position, thereby realizing stepless adjustment of flexible support block position, thereby can accurately adjust the position of flexible support block to the position required, when using seat, flexible support block does not appear abnormal backward shift because of being pressed, in addition, gas spring is placed between backboard and support, is not influenced by the size of backboard and support, and gas spring can drive backboard to rotate relative to support in a larger angle range, thereby making flexible support block have larger adjustment stroke. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure schematic diagram of the utility model;

[0019] Figure 2 It is Figure 1 It is the structure schematic diagram of the adjusting mechanism in the utility model;

[0020] Figure 3 It is the working state schematic diagram of the utility model;

[0021] Figure 4 It is another working state schematic diagram of the utility model;

[0022] Figure 5 It is Figure 1 It is the structure schematic diagram of the switch.

[0023] Wherein: 10, support;11, upper connecting seat;12, lower connecting seat;20, backboard;21, rotating seat;30, flexible support block;400, adjusting mechanism;40, gas spring;41, cylinder body;42, piston rod;43, button;50, mounting seat;51, containing cavity;52, connecting hole;53, shaft hole;60, knob;61, connecting end;62, pivot joint end;63, pressing part;70, pull rope;71, flexible sleeve;72, connecting column;80, switch;81, base;82, spanner. DETAILED DESCRIPTION

[0024] Below, combining the drawings and specific implementation, the utility model is described further, need explaining, under the premise of not conflicting, the following described each embodiment or each technical feature between can be any combination and form new embodiment. Except the special explanation, the material and equipment that the embodiment adopts in the embodiment can be bought from the market. The example of the embodiment is shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar function throughout. The embodiment described below by referring to the drawings is exemplary, and is only used to explain the application, and cannot be understood as the limitation of the application.

[0025] In the description of the application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise specifically specified and limited.

[0026] In the description of the application, it should be noted that unless otherwise expressly specified and limited, the terms "connected", "communicated", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or connected through an intermediate medium, or the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0027] As Figure 1 , 2, 3, 4, 5, it is a kind of seat waist support assembly of the utility model, it includes support 10, backplate 20, flexible support block 30 and adjusting mechanism 400, support 10 is fixed on the backrest of seat, backplate 20 is located at the front side of support 10, flexible support block 30 is connected at the front side of backplate 20, flexible support block 30 can be the shaped cotton of cortex or cotton cloth wrapping, for directly contacting with the waist of user, backplate 20 is hinged on support 10, so that backplate 20 can drive flexible support block 30 rotate relative to support 10 around first axis, adjusting mechanism 400 can be used to adjust the rotation angle of backplate 20 relative to support 10, and after adjusting angle, make backplate 20 and support 10 keep relative fixed, to meet the sitting posture requirement of user;Adjusting mechanism 400 includes gas spring 40, switch 80, dialing piece 60, gas spring 40 includes cylinder body 41, piston rod 42 and button 43, gas spring 40 is located between backplate 20 and support 10 and extends up and down, piston rod 42 extends downward from the lower end surface of cylinder body 41, button 43 is installed on piston rod 42, when button 43 is pressed, piston rod 42 and cylinder body 41 can be relatively movable, when button 43 is released, piston rod 42 and cylinder body 41 keep relative fixed;The cylinder body 41 of gas spring 40 is hinged with backplate 20, so that cylinder body 41 can rotate relative to backplate 20 around second axis, the second axis is parallel with first axis and is overlapped with a certain distance, piston rod 42 is hinged on support 10, dialing piece 60 is movably connected on piston rod 42 of gas spring 40, switch 80 can drive dialing piece 60 move relative to piston rod 42 of gas spring 40, so that dialing piece 60 can move relative to piston rod 42 between the first position of pressing button 43 and the second position of releasing button 43.

[0028] The waist support assembly in the utility model is used in the process, the switch 80 is used to drive the shift piece 60 to move, the air spring 40 can be controlled, when the adjustment is needed, the user operates the switch 80, the shift piece 60 is moved to the first position of the press button 43, the piston rod 42 can move relative to the cylinder body 41, the overall length of the air spring 40 can be changed, so that the back plate 20 can rotate relative to the support 10 around the first axis, so that the angle of the flexible support block 30 on the back plate 20 is adjusted, when the flexible support block 30 is adjusted to the angle suitable for the user's sitting posture and body shape, the switch 80 is operated, the shift piece 60 is moved to the second position of the release button 43, at this time, the piston rod 42 is fixed with the cylinder body 41, the overall length of the air spring 40 is in the state of fixedly not changing, so that the air spring 40 can provide stable support for the back plate 20, and the user can normally use the seat.The piston rod 42 of the air spring 40 can be fixed relative to the cylinder body 41 at any position in the process of moving relative to the cylinder body 41, so that when the angle of the back plate 20 is adjusted, the back plate 20 can be fixed at any position, the stepless adjustment of the position of the flexible support block 30 is realized, so that the flexible support block 30 can be accurately adjusted to the required position, and when the seat is used, the flexible support block 30 will not abnormally move back due to pressure.In addition, the air spring 40 is arranged between the back plate 20 and the support 10, is not affected by the size of the back plate 20 and the support 10, the air spring 40 can drive the back plate 20 to rotate relative to the support 10 within a large angle range, so that the flexible support block 30 has a large adjustment stroke.

[0029] In a preferred embodiment, the lower end of the piston rod 42 of the gas spring 40 is provided with a mounting base 50, and the toggle 60 is pivoted on the mounting base 50, so that the toggle 60 has the freedom of rotation relative to the piston rod 42, and in turn, the toggle 60 can be rotated relative to the piston rod 42 between the first position and the second position. When the toggle 60 is rotated to the first position, it can press the button 43 on the piston rod 42, and when the toggle 60 is rotated to the second position, it can release the piston rod 42. The toggle 60 is provided to be rotatable, which can facilitate the operation of the switch 80. The piston rod 42 of the gas spring 40 extends downward from the bottom of the cylinder 41, and the button 43 is arranged on the lower end face of the piston rod 42. The mounting base 50 is provided with a receiving cavity 51 and a connecting hole 52. The toggle 60 is placed in the receiving cavity 51, and the internal space of the receiving cavity 51 is configured to enable the toggle 60 to swing up and down inside it. The connecting hole 52 extends downward from the top surface of the mounting base 50 to the receiving cavity 51, and the piston rod 42 of the gas spring 40 is inserted into the connecting hole 52 from top to bottom, so that the piston rod 42 and the mounting base 50 are fixedly connected together. Specifically, external threads can be arranged on the surface of the piston rod 42, and internal threads are arranged inside the connecting hole 52. The piston rod 42 is inserted into the connecting hole 52, so that the mounting base 50 and the piston rod 42 are screwed together. Of course, in other embodiments, the piston rod 42 can be fixedly connected to the mounting base 50 by clamping, welding or other connection methods. After the piston rod 42 is inserted into the connecting hole 52, the button 43 on the lower end face of the piston rod 42 extends into the position at the top of the receiving cavity 51 through the connecting hole 52, and in turn, the button 43 is located above the toggle 60. When the toggle 60 swings upward inside the receiving cavity 51, the button 43 can be pressed, and when the toggle 60 swings downward inside the receiving cavity 51, the button 43 can be released.

[0030] In other embodiments, the toggle 60 can also be arranged to move linearly relative to the piston rod 42. For example, a sliding groove extending linearly can be arranged on the mounting base 50, and the toggle 60 is installed in the sliding groove so that the toggle 60 can move between the first position and the second position.

[0031] The bracket 10 is fixedly connected to a lower connecting base 12. Specifically, the main body of the bracket 10 is plate-shaped, and the lower connecting base 12 is fixedly connected to the bracket 10 and protrudes from the front side of the bracket 10. An axle hole 53 is arranged on the bottom of the mounting base 50, the mounting base 50 is placed at the lower connecting base 12, a set of locking screws are used to pass through the axle holes 53 on the lower connecting base 12 and the mounting base 50, the mounting base 50 is connected to the lower connecting base 12, so that the mounting base 50 can rotate relative to the lower connecting base 12, and in turn, the piston rod 42 and the bracket 10 are pivoted together.

[0032] The toggle member 60 comprises a pivot end 62, a connecting end 61 opposite to the pivot end 62, and a pressing portion 63 formed between the pivot end 62 and the connecting end 61, the pressing portion 63 is matched with the button 43 to press or release the button 43, and the pivot end 62 is pivotally matched with the mounting seat 50. The adjusting mechanism 400 further comprises a pull rope 70, one end of the pull rope 70 is connected to the connecting end 61 of the toggle member 60, and the other end of the pull rope 70 is connected to a switch 80, the pull rope 70 can be pulled by operating the switch 80, and then the toggle member 60 is swung relative to the mounting seat 50. For example, after the toggle member 60 is placed in the accommodating cavity 51 of the mounting seat 50, the toggle member 60 is located below the button 43, the connecting end 61 is provided as a hook, one end of the pull rope 70 is passed through the hook from top to bottom, and a connecting column 72 is connected to the one end of the pull rope 70, the connecting column 72 is clamped below the hook, and the connecting end 61 is swung upward by pulling the pull rope 70 upward, and then the pressing portion 63 presses the button 43 while moving upward by a certain stroke. That is, when the switch 80 is operated, the pull rope 70 is pulled upward by the switch 80, the toggle member 60 is swung upward to press the button 43, and when the switch 80 is released, the pull rope 70 is no longer stressed, and the toggle member 60 can be swung downward according to the weight. Of course, in order to ensure that the toggle member 60 can move downward to a state of being separated from the button 43, a resilient member can also be arranged between the toggle member 60 and the mounting seat 50, and the resilient member applies an elastic stress to the toggle member 60, and the toggle member 60 is swung downward to reset when the switch 80 is released. The switch 80 comprises a base 81 fixed on the support 10 and a wrench 82 pivotally connected to the base 81, the other end of the pull rope 70 is connected to the wrench 82, the pull rope 70 is externally sleeved with a flexible sleeve 71, one end of the flexible sleeve 71 is fixedly matched with the piston rod 42 of the gas spring 40, for example, the one end of the flexible sleeve 71 can be connected to the mounting seat 50 or the piston rod 42, and the other end of the flexible sleeve 71 is fixedly matched with the base 81, for example, the other end of the flexible sleeve 71 is directly connected to the base 81 or the support 10, and the pull rope 70 can be pulled by rotating the wrench 82, and then the toggle member 60 is moved.

[0033] It should be noted that in other embodiments, the gas spring 40 can be arranged such that the piston rod 42 faces upward and the cylinder body 41 faces downward, and the button 43 is located at the top of the gas spring 40, based on which the toggle member 60 can be arranged above the piston rod 42.

[0034] The support 10 is fixedly connected with an upper connecting seat 11, the back plate 20 is fixedly connected with a rotating seat 21 in the back, the rotating seat 21 is pivotally connected with the upper connecting seat 11 through a rotating shaft, thus, the back plate 20 and the support 10 are hinged together, and the central axis of the rotating shaft is the first axis; the cylinder body 41 of the gas spring 40 is connected with the rotating seat 21 through a set of locking screws in the top, and the cylinder body 41 and the back plate 20 are hinged together, and the central axis of the locking screw is the second axis.

[0035] It should be explained that the support 10 of the utility model is not limited to being connected with the back of the seat, and can also be connected with the cushion of the seat, in any case, as long as the flexible supporting block 30 can support the waist of the user.

[0036] The seat of the utility model comprises the above-mentioned waist support assembly, other structures of the seat are the same as those of the prior art, and will not be described in detail here.

[0037] Finally, it should be explained that: the above-mentioned embodiments are only optional embodiment modes of the utility model, and cannot be used to limit the scope of protection of the utility model, and any non-substantial changes and replacements made by the person skilled in the art on the basis of the utility model all belong to the scope of protection required by the utility model.

Claims

1. A lumbar support assembly, characterized by, The backrest is hinged to the support to enable the backrest to rotate relative to the support about a first axis; The adjusting mechanism comprises a gas spring, a switch, and a knob. The gas spring comprises a cylinder, a piston rod, and a button arranged on the piston rod. The button is used to enable the piston rod and the cylinder to move relative to each other when the button is pressed, and to keep the piston rod and the cylinder fixed relative to each other when the button is released. The cylinder is hinged to the backrest to enable the cylinder to rotate relative to the backrest about a second axis, which is parallel to and offset from the first axis. The piston rod is hinged to the support. The knob is movably connected to the piston rod of the gas spring. The switch is used to drive the knob to move relative to the piston rod between a first position in which the button is pressed and a second position in which the button is released.

2. The lumbar support assembly of claim 1, wherein, The piston rod of the gas spring is provided with a mounting seat. The knob is pivoted to the mounting seat to enable the knob to rotate relative to the piston rod between the first position and the second position.

3. The lumbar support assembly of claim 2, wherein, The piston rod of the gas spring extends downward from the bottom of the cylinder. The button is arranged on the lower end face of the piston rod. The mounting seat is provided with a receiving cavity and a connecting hole. The knob is arranged in the receiving cavity. The connecting hole extends downward from the top face of the mounting seat to the receiving cavity. The piston rod of the gas spring is inserted into the connecting hole from top to bottom to fix the piston rod and the mounting seat together. The button arranged on the lower end face of the piston rod extends into the receiving cavity through the mounting hole and is arranged above the knob.

4. The lumbar support assembly of claim 3, wherein, The support is fixedly connected with a lower connecting seat. The mounting seat is connected to the lower connecting seat by a first pair of lock screws to pivot the piston rod and the support together.

5. The lumbar support assembly of claim 2, wherein, The knob comprises a pivoting end that is pivoted to the mounting seat, and a connecting end that is opposite to the pivoting end. A portion of the knob between the pivoting end and the connecting end forms a pressing part that is matched with the button. The adjusting mechanism further comprises a pull rope. One end of the pull rope is connected to the connecting end of the knob. The other end of the pull rope is connected to the switch.

6. The lumbar support assembly of claim 5, wherein, The knob is arranged below the button. The connecting end is a hook. One end of the pull rope passes through the hook from top to bottom. A connecting column that is clamped below the hook is arranged at the one end of the pull rope.

7. The lumbar support assembly of claim 6, wherein, The switch comprises a base that is fixed to the support, and a wrench that is pivoted to the base. The other end of the pull rope is connected to the wrench. The pull rope is externally sleeved with a flexible sleeve. The two ends of the flexible sleeve are fixedly matched with the piston rod of the gas spring and the base of the switch, respectively.

8. The lumbar support assembly of claim 1, wherein, The support is fixedly connected with an upper connecting seat. The back of the backrest is fixedly connected with a rotating seat. The rotating seat is pivoted to the upper connecting seat by a rotating shaft to hinge the backrest and the support together. The central axis of the rotating shaft is the first axis. The top of the cylinder of the gas spring is connected to the rotating seat by a second pair of lock screws to hinge the backrest and the cylinder together. The central axis of the second pair of lock screws is the second axis.

9. The lumbar support assembly of claim 1, wherein, The piston rod of the gas spring is provided with a mounting seat. The mounting seat is provided with a sliding groove that extends along a straight line. The knob is arranged in the sliding groove to enable the knob to move relative to the piston rod between the first position and the second position.

10. A seat, characterized by The lumbar support assembly comprises the lumbar support assembly according to any one of claims 1-9.

Images