Backrest lifting mechanism and seat

Abstract

The application discloses a back lifting mechanism and a seat, and the back lifting mechanism comprises a supporting seat, a lifting assembly and a supporting assembly, the two sides of the supporting seat are provided with connecting arms; the lifting assembly comprises a back support and a telescopic gas rod, the back support is provided with rotatable first linkage rods and second linkage rods, the first linkage rods are rotatably connected to the connecting arms, the second linkage rods are rotatably connected to the supporting seat, one end of the telescopic gas rod is rotatably connected to the supporting seat, and the other end of the telescopic gas rod is rotatably connected to the back support; a control assembly is used for controlling the telescopic gas rod; the telescopic gas rod can be controlled by the control assembly, the telescopic gas rod can be telescoped, the first linkage rods can be rotated up and down relative to the connecting arms, the second linkage rods can be rotated up and down relative to the supporting seat, and the first linkage rods and the second linkage rods can drive the back support to be lifted by cooperation, and the back lifting mechanism provided by the application can realize stepless adjustment of the height of the back support by cooperation of the telescopic gas rod and the first linkage rods and the second linkage rods.

Description

Technical Field

[0001] This invention relates to the field of seating manufacturing technology, and in particular to a backrest lifting mechanism and a seat. Background Technology

[0002] The structure of chairs on the market includes a seat cushion, armrests, and backrest. The backrest can provide support for the back of the human body and can improve user comfort. However, in related technologies, the position of the backrest is generally fixed to the seat, or the height of the backrest can only be adjusted in preset steps. However, users of different heights have different requirements for the backrest height. The backrest that is fixed to the seat cannot be adjusted in height, and the limitation of the backrest that can only be adjusted in preset steps is also quite large, which cannot meet the needs of users. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a backrest lifting mechanism that utilizes a telescopic gas spring in conjunction with a first and a second linkage rod to achieve stepless adjustment of the backrest height, thus meeting the needs of different users.

[0004] Secondly, the present invention also proposes a seat that utilizes the aforementioned backrest lifting mechanism.

[0005] According to a first aspect of the present invention, a backrest lifting mechanism includes: a support base, a lifting assembly, and a support component. Connecting arms are provided on both sides of the support base. The lifting assembly includes a back support frame and a telescopic gas spring. Rotatable first linkage rods are provided on both sides of the middle portion of the back support frame, and a rotatable second linkage rod is provided at the lower end. The first linkage rods are rotatably connected to the connecting arms, and the second linkage rod is rotatably connected to the rear side of the support base. One end of the telescopic gas spring is rotatably connected to the rear side of the support base, and the other end is rotatably connected to the lower end of the back support frame. A control component is used to control the telescopic gas spring. By controlling the telescopic gas spring through the control component, the telescopic gas spring can extend and retract. The first linkage rod can rotate vertically relative to the connecting arms, and the second linkage rod can rotate vertically relative to the support base. The first linkage rod and the second linkage rod cooperate to drive the back support frame to lift and lower.

[0006] The backrest lifting mechanism provided in the first aspect embodiment of the present invention has at least the following beneficial effects: When the backrest lifting mechanism is applied to a seat, users of different heights can unlock the telescopic gas spring through the control component. When it is necessary to raise the backrest, controlling the extension of the telescopic gas spring can drive the first linkage rod and the second linkage rod to rotate upward, thereby raising the height of the backrest; controlling the retraction of the telescopic gas spring can drive the first linkage rod and the second linkage rod to rotate downward, thereby lowering the height of the backrest. Once the height of the backrest is adjusted to a suitable position, the user can lock the telescopic gas spring through the control component to lock the backrest, thereby realizing the adjustment of the height of the backrest. The backrest lifting mechanism provided in this embodiment of the present invention can realize stepless adjustment of the height of the backrest by using the telescopic gas spring in cooperation with the first linkage rod and the second linkage rod, which can meet the needs of different users.

[0007] According to a first aspect embodiment of the present invention, the back support is connected to two second linkage rods, the two second linkage rods are respectively placed on both sides of the lower end of the back support, and the telescopic air rod is located between the two second linkage rods.

[0008] According to a first aspect of the present invention, the first linkage rod and the second linkage rod located on the same side of the support base are parallel to each other in the back lifting mechanism.

[0009] According to a first aspect embodiment of the present invention, the back lifting mechanism includes a control component that is rotatable relative to the back support, the control component being located on one side of the back support, and rotating the control component can trigger the control component to unlock the telescopic gas spring.

[0010] According to a first aspect embodiment of the present invention, the back lifting mechanism includes a control component comprising a cable holder, a pull rope, and a trigger. The cable holder is fixed to the back support, the control plate is rotatably connected to the cable holder, and the trigger is rotatably connected to the telescopic gas spring. One end of the pull rope is connected to the control plate, and the other end is connected to the trigger. Rotating the control plate can pull the pull rope, thereby driving the trigger to unlock the telescopic gas spring.

[0011] According to the back lifting mechanism provided in the first aspect embodiment of the present invention, the control component further includes a locking seat, a locking member, and a locking buckle. The locking seat is fixedly connected to the back support, the locking member is connected to the pull rope and slidably connected to the locking seat, one end of the locking buckle is fixed to the locking seat, and the other end extends to the locking buckle. When the pull rope pulls the locking member to slide, the locking buckle engages with the locking member, and the trigger member can keep the telescopic air rod unlocked.

[0012] According to a first aspect embodiment of the present invention, the control component further includes a reset member, one end of which abuts against the locking seat and the other end of which abuts against the locking member. The locking member has a buckling boss in the middle, and a first sliding groove and a second sliding groove connected end to end are provided around the buckling boss. The buckling boss has a buckling groove communicating with the first sliding groove and the second sliding groove. The end of the locking buckle is located in the first sliding groove. When the pull rope is pulled, the end of the locking buckle can be inserted into the buckling groove along the first sliding groove. When the pull rope is pulled again, the end of the locking buckle separates from the buckling groove. The reset member pushes the locking member to reset, and the locking buckle can slide along the second sliding groove to return to the first sliding groove.

[0013] According to the back lifting mechanism provided in the first aspect embodiment of the present invention, the locking member is further provided with a guide block, which can guide the end of the locking buckle to slide into the second sliding groove when the end of the locking buckle is separated from the buckle groove.

[0014] According to a first aspect embodiment of the present invention, the back lifting mechanism is provided with a torsion spring for driving the control plate to reset.

[0015] The seat provided according to a second aspect embodiment of the present invention includes a backrest lifting mechanism as described in the first aspect embodiment of the present invention.

[0016] The seat provided according to a second aspect embodiment of the present invention has at least the following beneficial effects: users of different heights can unlock the telescopic gas spring through the control component. When it is necessary to raise the backrest, controlling the extension of the telescopic gas spring can drive the first linkage rod and the second linkage rod to rotate upward, thereby raising the height of the backrest; controlling the retraction of the telescopic gas spring can drive the first linkage rod and the second linkage rod to rotate downward, thereby lowering the height of the backrest. After the height of the backrest is adjusted to a suitable position, the user can lock the telescopic gas spring through the control component to lock the backrest, thereby realizing the adjustment of the height of the backrest.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Additional aspects and advantages of the invention will become apparent and readily understood in conjunction with the following description of the embodiments, in which:

[0019] Figure 1 This is an overall schematic diagram of the back lifting mechanism provided in the first aspect embodiment of the present invention;

[0020] Figure 2 A side view of the back lifting mechanism provided in the first aspect embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the lifting assembly provided in the first aspect embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the back support and control assembly provided in the first aspect embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the control assembly and telescopic pneumatic rod provided in the first aspect embodiment of the present invention;

[0024] Figure 6 for Figure 5 Enlarged diagram of the circled area.

[0025] The attached icons are numbered as follows:

[0026] Support base 100; Connecting arm 110;

[0027] Lifting assembly 200; back support 210; telescopic air column 220; first linkage rod 230; second linkage rod 240;

[0028] Control component 300; control plate 310; wire seat 320; pull rope 330; trigger 340; locking seat 350; locking element 360; buckle boss 361; first slide groove 362; second slide groove 363; buckle groove 364; guide block 365; locking buckle 370; reset element 380. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0031] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0032] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0033] The structure of chairs on the market includes a seat cushion, armrests, and backrest. The backrest can provide support for the back of the human body and can improve user comfort. However, in related technologies, the position of the backrest is generally fixed to the seat, or the height of the backrest can only be adjusted in preset steps. However, users of different heights have different requirements for the backrest height. The backrest that is fixed to the seat cannot be adjusted in height, and the limitation of the backrest that can only be adjusted in preset steps is also quite large, which cannot meet the needs of users.

[0034] To address this issue, the first aspect of this invention provides a backrest lifting mechanism. By utilizing the telescopic pneumatic rod 220 in conjunction with the first linkage rod 230 and the second linkage rod 240, stepless adjustment of the height of the backrest 210 can be achieved, meeting the needs of different users. The specific structure and function of the backrest lifting mechanism provided in this embodiment will be further described below with reference to the text and accompanying drawings.

[0035] Reference Figures 1 to 4 According to a first aspect embodiment of the present invention, a back lifting mechanism includes: a support base 100, a lifting assembly 200, and a support component. Connecting arms 110 are provided on both sides of the support base 100. The lifting assembly 200 includes a back support 210 and a telescopic gas spring 220. Rotatable first linkage rods 230 are provided on both sides of the middle portion of the back support 210, and a rotatable second linkage rod 240 is provided at the lower end. The first linkage rods 230 on both sides of the back support 210 are rotatably connected to the connecting arms 110 on both sides of the support base 100, and the second linkage rod 240 is rotatably connected to the rear side of the support base 100. One end of the telescopic gas spring 220 is rotatably connected to the rear side of the support base 100, and the other end is rotatably connected to the lower end of the back support 210. The telescopic gas spring 220 has an unlocked state and... In the locked state, when the telescopic air rod 220 is in the unlocked state, it can extend and retract freely; when it is in the locked state, it is fixed and cannot extend or retract. The control component 300 is used to control the telescopic air rod 220 to unlock or lock it. When the telescopic air rod 220 is unlocked by the control component 300, it can extend and retract. The first linkage rod 230 can rotate up and down relative to the connecting arm 110, and the second linkage rod 240 can rotate up and down relative to the support base 100. The first linkage rod 230 and the second linkage rod 240 work together to drive the back support 210 to rise and fall. When the user adjusts the back support 210 to a suitable height, the telescopic air rod 220 can be locked again by controlling the control component 300.

[0036] According to the first aspect embodiment of the present invention, the backrest lifting mechanism is applied to a seat. Users of different heights can unlock the telescopic gas spring 220 through the control component 300. When it is necessary to raise the backrest 210, controlling the extension of the telescopic gas spring 220 can drive the first linkage rod 230 and the second linkage rod 240 to rotate upward, raising the height of the backrest 210. Controlling the retraction of the telescopic gas spring 220 can drive the first linkage rod 230 and the second linkage rod 240 to rotate downward, lowering the height of the backrest 210. Once the height of the backrest 210 is adjusted to a suitable position, the user can lock the telescopic gas spring 220 through the control component 300 to lock the backrest 210, thereby achieving the adjustment of the height of the backrest 210. The backrest lifting mechanism provided by the present invention can achieve stepless adjustment of the height of the backrest 210 by using the telescopic gas spring 220 in cooperation with the first linkage rod 230 and the second linkage rod 240, which can meet the needs of different users.

[0037] It should be noted that the control component 300 can control the telescopic gas spring 220 to remain in the unlocked state so that the telescopic gas spring 220 can extend and retract freely. When the user leans back against the back support 210, the back support 210 will automatically adjust according to the force transmitted from the user's back, so that the back support 210 fits the user's back better, thereby reducing the back-rubbing sensation caused by the back support 210 on the user's back and improving the user experience.

[0038] Reference Figure 1 and Figure 3 According to the back lifting mechanism provided in the first aspect embodiment of the present invention, the lower end of the back support 210 is connected to two rotatable second linkage rods 240. The two second linkage rods 240 are respectively placed on both sides of the lower end of the back support 210. The provision of two second linkage rods 240 is beneficial to improving the stability of the connection between the lower end of the back support 210 and the support base 100. By setting the telescopic air rod 220 between the two second linkage rods 240, the compactness of the structure is improved.

[0039] Reference Figures 1 to 3 According to the backrest lifting mechanism provided in the first aspect embodiment of the present invention, the first linkage rod 230 and the second linkage rod 240 located on the same side of the support base 100 are parallel to each other. That is, the connection points between the chair back, the first linkage rod 230, the second linkage rod 240 and the connecting arm 110 are connected to form a structure similar to a parallelogram. In actual use, the chair back can be raised and lowered in the vertical direction, which not only helps to prevent the position of the chair back from shifting during the raising and lowering process, but also helps to improve the stability of the connection between the chair back, the first linkage rod 230, the second linkage rod 240 and the connecting arm 110.

[0040] Reference Figure 2 and Figure 4According to the first aspect embodiment of the present invention, the back lifting mechanism includes a control component 300 that is rotatable relative to the back support 210. The control component 310 is located on one side of the back support 210. Rotating the control component 310 can trigger the control component 300 to unlock the telescopic gas spring 220. In actual use, the user can adjust the lifting of the back support 210 by rotating the control component 310 located on one side of the back support 210. The operation is simple and convenient.

[0041] Reference Figure 4 and Figure 5 According to the first aspect of the present invention, the back lifting mechanism includes a control component 300 comprising a cable holder 320, a pull rope 330, and a trigger 340. The cable holder 320 is fixed to the back support 210 by fasteners. A control plate 310 is rotatably connected to the cable holder 320. The trigger 340 is rotatably connected to the telescopic air rod 220. The telescopic air rod 220 has an unlocking post. The trigger 340 has a connecting part and a pressing part. Rotating the trigger 340 causes the pressing part of the trigger 340 to press down the unlocking post, thereby unlocking the telescopic air rod 220. One end of the pull rope 330 is connected to the control plate 310, and the other end is connected to the connecting part of the trigger 340. Rotating the control plate 310 causes the pull rope 330 to be pulled, thereby causing the pressing part of the trigger 340 to press down to the unlocking post of the telescopic air rod 220 to unlock the telescopic air rod 220. The trigger 340 and the control plate 310 of the control component 300 are connected by the pull rope 330. The power transmission during operation is stable, which is beneficial to improving the stability of the structure.

[0042] It should be noted that the pull rope 330 has a structure similar to a brake cable or accelerator cable, specifically including an outer shell and a force line. The force line is set inside the outer shell and can move. The connection between the pull rope 330 and the control plate 310 can be understood as follows: the outer shell of the pull rope 330 is fixed on the line seat 320, and the end of the force line is connected to the control plate 310. Rotating the control plate 310 can pull the force line.

[0043] Reference Figures 4 to 6According to the backrest lifting mechanism provided in the first aspect embodiment of the present invention, the control assembly 300 further includes a locking seat 350, a locking member 360, and a locking buckle 370. The locking seat 350 is fixedly connected to the back support 210 by fasteners. The locking member 360 is connected to the pull rope 330 and slidably connected to the locking seat 350. When the control piece 310 rotates to drive the pull rope 330, the locking member 360 can slide on the locking seat 350. One end of the locking buckle 370 is fixed to the locking seat 350, and the other end extends to... Locking buckle 370: When the pull cord 330 pulls the locking member 360 to slide, the end of the locking buckle 370 is fastened to the locking member 360. The trigger member 340 can keep the telescopic air rod 220 unlocked. At this time, the telescopic air rod 220 can extend and retract freely. When the user leans back against the back support 210, the back support 210 will automatically adjust according to the force transmitted from the user's back, so that the back support 210 fits the user's back better, thereby reducing the back-rubbing sensation caused by the back support 210 on the user's back and improving the user experience.

[0044] Reference Figures 4 to 6 According to the back lifting mechanism provided in the first aspect embodiment of the present invention, the control component 300 further includes a reset member 380. One end of the reset member 380 abuts against the locking seat 350, and the other end abuts against the locking member 360. The locking member 360 has a buckling boss 361 in the middle. The buckling boss 361 has a first sliding groove 362 and a second sliding groove 363 connected end to end around its periphery. The buckling boss 361 has a buckling groove 364 communicating with the first sliding groove 362 and the second sliding groove 363. The end of the locking buckle 370 is located in the first sliding groove 362. When the user rotates the control piece 310 to pull the pull rope 330, the locking member 360 engages with the lock. When the fixed seat 350 slides relative to the locking buckle 370, the end of the locking buckle 370 can be engaged and fixed in the fastening groove 364 along the first slide groove 362. At this time, the trigger member 340 can keep the unlocking pin of the telescopic gas rod 220 pressed down so that the telescopic gas rod 220 remains unlocked. When the user pulls the pull rope 330 again, the end of the locking buckle 370 separates from the fastening groove 364, the reset member 380 pushes the locking member 360 to reset, and the locking buckle 370 can slide along the second slide groove 363 to return to the first slide groove 362. In actual use, the locking and unlocking cycle of the telescopic gas rod 220 can be adjusted by pulling the control piece 310 by hand, which is simple and convenient to operate.

[0045] Reference Figure 6 According to the back lifting mechanism provided in the first aspect embodiment of the present invention, the locking member 360 is further provided with a guide block 365. When the end of the locking buckle 370 is separated from the buckle groove 364, the guide block 365 can guide the end of the locking buckle 370 to slide into the second slide groove 363, so that the end of the locking buckle 370 can slide into the second slide groove 363 more smoothly, and prevent the end of the locking buckle 370 from getting stuck between the locking member 360 during the pulling of the pull rope 330.

[0046] Reference Figure 5 According to the back lifting mechanism provided in the first aspect embodiment of the present invention, the cable holder 320 is provided with a torsion spring (not shown in the figure) for driving the control plate 310 to reset. When the user pulls the control plate 310 and releases it, the control plate 310 can automatically reset under the action of the torsion spring, so as to facilitate the user's next operation.

[0047] The seat provided according to a second aspect of the present invention includes a backrest lifting mechanism as described in the first aspect of the present invention.

[0048] According to the second aspect embodiment of the present invention, users of different heights can unlock the telescopic gas spring 220 through the control component 300. When it is necessary to raise the backrest 210, controlling the extension of the telescopic gas spring 220 can drive the first linkage rod 230 and the second linkage rod 240 to rotate upward, thereby raising the height of the backrest 210. Controlling the retraction of the telescopic gas spring 220 can drive the first linkage rod 230 and the second linkage rod 240 to rotate downward, thereby lowering the height of the backrest 210. Once the height of the backrest 210 is adjusted to a suitable position, the user can lock the telescopic gas spring 220 through the control component 300 to lock the backrest 210, thereby achieving the adjustment of the height of the backrest 210.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. The present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A back lift mechanism characterized by, include: The support base has connecting arms on both sides; The lifting assembly includes a back support and a telescopic gas spring. The back support has rotatable first linkage rods on both sides of the middle part and a rotatable second linkage rod at the lower end. The first linkage rods are rotatably connected to the connecting arm, and the second linkage rods are rotatably connected to the rear side of the support base. One end of the telescopic gas spring is rotatably connected to the rear side of the support base, and the other end is rotatably connected to the lower end of the back support. Control components for controlling the telescopic air spring; The telescopic air rod is controlled by the control component, and the telescopic air rod can extend and retract. The first linkage rod can rotate up and down relative to the connecting arm, and the second linkage rod can rotate up and down relative to the support base. The first linkage rod and the second linkage rod cooperate to drive the back support to rise and fall. The control component includes a control plate that can rotate relative to the back support. The control plate is located on one side of the back support. Rotating the control plate can trigger the control component to unlock the telescopic air rod. The control component includes a cable holder, a pull cord, and a trigger. The cable holder is fixed to the back support. The control plate is rotatably connected to the cable holder. The trigger is rotatably connected to the telescopic air rod. One end of the pull cord is connected to the control plate, and the other end is connected to the trigger. Rotating the control plate can pull the pull cord, thereby driving the trigger to unlock the telescopic air rod. The control component also includes a locking seat, a locking member, and a locking buckle. The locking seat is fixedly connected to the back support. The locking member is connected to the pull rope and slidably connected to the locking seat. One end of the locking buckle is fixed to the locking seat, and the other end extends to the locking member. When the pull rope pulls the locking member to slide, the locking buckle engages with the locking member. The trigger can keep the telescopic air rod unlocked.

2. The back lift mechanism of claim 1, wherein, The back support is connected to two second linkage rods, which are located on both sides of the lower end of the back support, and the telescopic air rod is located between the two second linkage rods.

3. The back lifting mechanism according to claim 2, characterized in that, The first linkage rod and the second linkage rod, located on the same side of the support base, are parallel to each other.

4. The back lifting mechanism according to claim 1, characterized in that, The control component further includes a reset member, one end of which abuts against the locking seat and the other end against the locking member. The locking member has a latching boss in the middle, and a first sliding groove and a second sliding groove connected end to end are provided around the latching boss. The latching boss has a latching groove communicating with the first sliding groove and the second sliding groove. The end of the locking buckle is located in the first sliding groove. When the pull rope is pulled, the end of the locking buckle can be inserted into the latching groove along the first sliding groove. When the pull rope is pulled again, the end of the locking buckle separates from the latching groove. The reset member pushes the locking member to reset, and the locking buckle can slide along the second sliding groove to return to the first sliding groove.

5. The back lifting mechanism according to claim 4, characterized in that, The locking element is also provided with a guide block. When the end of the locking buckle is separated from the buckle groove, the guide block can guide the end of the locking buckle to slide into the second groove.

6. The back lifting mechanism according to claim 1, characterized in that, The connector is equipped with a torsion spring for driving the control plate to reset.

7. A type of seat, characterized in that, Includes the back lifting mechanism as described in any one of claims 1 to 6.

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