Chair pillow mounting structure and chair

Abstract

According to the chair pillow mounting structure and the chair, a headrest and a shoulder pillow which are independent are arranged, the headrest is mounted at the top of a lifting adjusting rod, the shoulder pillow is mounted in the middle of the lifting adjusting rod, and the bottom of the lifting adjusting rod is mounted on a back frame with a backrest, so that the headrest, the shoulder pillow and the backrest are sequentially arranged from top to bottom to correspond to different body parts of a human body; the shoulder pillow is installed in the middle of the lifting adjusting rod in a lifting mode. Meanwhile, the back frame is divided into a fixed base and a lifting seat capable of moving up and down, and the lifting adjusting rod is installed on the lifting seat in a lifting mode. The height of the headrest, the height of the shoulder pillow and the height of the backrest can be adjusted respectively, the height of the headrest, the height of the shoulder pillow and the height of the backrest can also be adjusted at the same time, and therefore the adjusting range and the application range of the chair pillow are widened, and use requirements of more people are met.

Description

Technical Field

[0001] This utility model relates to furniture, and in particular to the installation structure of a cushion on a chair. Background Technology

[0002] Traditional chairs consist of three parts: seat, backrest, and legs. To improve user comfort, modern ergonomic chairs typically include a headrest. As user needs have evolved, some ergonomic chairs extend the top of the backrest forward and to the sides as shoulder rests to support the shoulders, providing even more comfortable support. Furthermore, to meet the needs of different users, headrests are generally height-adjustable, but shoulder rests cannot be adjusted in the same way, limiting their applicability. In other chairs, shoulder rests are height-adjustable in a similar way to headrests, but the shoulder and headrests are adjusted independently. This not only makes the structure complex but also requires separate adjustment of the headrest and shoulder rest, making it cumbersome and inconvenient to operate. Utility Model Content

[0003] The purpose of this utility model is to provide a chair cushion mounting structure that can adjust the height of the headrest and shoulder pillow separately or simultaneously, and a chair using this chair cushion mounting structure, so as to improve the applicability and ease of operation and meet the needs of more people.

[0004] The chair cushion installation structure of this utility model includes a back frame for mounting the backrest, a lifting and adjusting rod with a headrest mounted on top, and a shoulder pillow for supporting the human shoulder. The shoulder pillow is located below the headrest and above the backrest, and is vertically and adjustablely mounted in the middle of the lifting and adjusting rod.

[0005] The chair described in this utility model is equipped with the chair cushion mounting structure as described above.

[0006] The chair cushion installation structure and chair described in this utility model have a headrest installed at the top, a shoulder pillow in the middle, and a backrest frame at the bottom of the lifting adjustment rod, so that the headrest, shoulder pillow, and backrest are arranged sequentially from top to bottom to correspond to different body parts. The bottom of the lifting adjustment rod is mounted on the backrest frame in a height-adjustable manner, allowing the headrest and shoulder pillow to move up and down to adjust to different heights. The shoulder pillow, which supports the shoulders, is an independent cushion rather than being fixed to the top of the backrest, thus meeting the adjustment needs of different users. The shoulder pillow can be positioned on the lifting adjustment rod, so that the headrest and shoulder pillow are raised and lowered synchronously by raising and lowering the lifting adjustment rod, which can maintain the distance between the headrest and shoulder pillow and improve the ease of operation. At the same time, the shoulder pillow can be adjusted relative to the lifting adjustment rod, thereby changing the distance between the shoulder pillow and the headrest. This achieves independent adjustment of the headrest and shoulder pillow, and also allows for easy adjustment of the relative distance between the three cushions (headrest, shoulder pillow, and backrest), thereby increasing the adjustment range and applicability of the chair cushion and meeting the needs of more users.

[0007] Preferably, the back frame includes a fixed base and a lifting seat that moves up and down relative to the base. The backrest is mounted on the lifting seat, and the lifting adjustment rod is mounted on the lifting seat in a height-adjustable manner.

[0008] Preferably, the back of the lifting seat is provided with baffles on both sides, and guide plates are provided on the inner sides of the two baffles respectively. The lifting adjustment rod is located between the two baffles, and lifting guide grooves are provided on both sides of the lifting adjustment rod respectively. The lifting guide grooves and guide plates can be inserted into each other in a relatively movable manner.

[0009] Preferably, the shoulder pillow is installed in front of the lifting adjustment rod, and an adjustment seat is provided on the back of the shoulder pillow. A baffle plate is installed on the adjustment seat, and guide plates are respectively provided on the inner side of the two baffle plates. The guide plates are inserted into the guide grooves on the lifting adjustment rod. Several ball grooves are provided vertically along the upper edge of the lifting adjustment rod. The adjustment seat is provided with ball grooves and balls installed in the ball grooves and cooperating with the ball grooves of the lifting adjustment rod. A ball spring is provided between the bottom of the ball groove and the ball. The lifting adjustment rod moves up and down and drives different ball grooves to cooperate with the balls.

[0010] Preferably, the back of the lifting seat is provided with a ball groove and a ball installed in the ball groove. A ball spring is provided between the bottom of the ball groove and the ball. Several ball groove points are provided vertically along the upper edge of the lifting adjustment rod. The lifting adjustment rod moves up and down and drives different ball groove points to cooperate with the ball.

[0011] Preferably, the ball springs installed on the adjusting seat and the lifting seat exert the same or different elastic forces on the lifting adjusting rod.

[0012] Preferably, the bottom of the shoulder pillow is provided with a headrest slot, and the top of the lifting seat is provided with a positioning block that can be inserted into the headrest slot.

[0013] Preferably, the bottom end of the lifting adjustment rod is provided with limiting hooks on both sides that can abut against the baffle plate, and a deformation groove is provided between the middle part of the bottom end of the lifting adjustment rod and the limiting hooks on both sides.

[0014] Preferably, a locking mechanism is installed between the back frame and the shoulder pillow to lock or unlock them.

[0015] Preferably, the locking mechanism includes a locking plate hinged to the shoulder pillow, a locking spring installed between one end of the locking plate and the shoulder pillow, a locking hook at the other end of the locking plate, and a locking block on the back frame that locks with the locking hook; the back frame also has a stop block that abuts against one end of the locking plate, and the locking spring and the stop block are respectively located on both sides of the locking plate; and the bottom surface of the locking hook and the top surface of the locking block are both inclined.

[0016] Preferably, a protective cover is provided on the outside of the locking mechanism.

[0017] Preferably, the locking mechanism includes a pressing block fixedly installed on the shoulder pillow and a lifting adjustment block rotatably installed on the shoulder pillow in the middle. A locking spring is installed between the top of the lifting adjustment block and the pressing block. A locking hook is provided on the side of the bottom of the lifting adjustment block facing the back frame, and the bottom of the locking hook is inclined. A locking groove is provided on the back frame to engage with the locking hook. A pressing part protruding from the surface of the shoulder pillow is also provided on the lifting adjustment block.

[0018] Preferably, the shoulder pillow is provided with an arc-shaped groove, the lifting adjustment block is provided with a rotating column placed in the arc-shaped groove, and the pressing block is provided with a pressing part that abuts against the rotating column.

[0019] Preferably, the headrest is rotatably mounted on the top of the lifting adjustment rod via a rotating adjustment rod.

[0020] Preferably, the top of the lifting adjustment rod has recessed adjustment truncated cones on both sides, the ends of the rotating adjustment rod are located on both sides of the adjustment truncated cones, and the tops of the rotating adjustment rod and the lifting adjustment rod have through holes that are arranged opposite to each other. The through holes of the rotating adjustment rod are equipped with a rotating adjustment block and a rotating pressure block. The bottom of the adjustment truncated cone contacts the side of the rotating adjustment block and is provided with mutually interlocking adjustment teeth along the circumference. The rotating adjustment block and the rotating pressure block are provided with headrest springs. Bolts pass through the rotating pressure block, the headrest springs and the rotating adjustment block and are screwed to the nut.

[0021] Preferably, the backrest includes a left backrest and a right backrest arranged opposite to each other, and a spinal backrest disposed between the left backrest and the right backrest.

[0022] The above-mentioned chair cushion installation structure allows for better use of headrests and shoulder pillows, improving their comfort. Attached Figure Description

[0023] Figure 1 , 2This is a schematic diagram of the first embodiment of the chair cushion installation structure.

[0024] Figure 3 This is a schematic diagram showing the adjustment state of the chair cushion installation structure.

[0025] Figure 4 This is a schematic diagram of the connection structure of the base, lifting seat, lifting adjustment rod and shoulder pillow of the chair cushion installation structure.

[0026] Figure 5 , 6 This is a structural diagram of the back frame.

[0027] Figure 7 This is a schematic diagram of the exploded structure of the back frame.

[0028] Figure 8 This is a schematic diagram of the connection structure between the lifting seat and the positioning block.

[0029] Figure 9 This is a schematic diagram of the connection and lifting adjustment structure of the base and positioning block.

[0030] Figure 10-12 This is a schematic diagram of the connection structure between the backrest and the shoulder pillow.

[0031] Figure 13 , 14 This is a structural diagram of the headrest and the height adjustment rod.

[0032] Figure 15 , 16 This is a schematic diagram of the locking mechanism in Embodiment 2 of the chair cushion installation structure.

[0033] Figure 17 This is a partial structural schematic diagram of Embodiment 2.

[0034] Figure 18 This is a structural diagram of the shoulder pillow, locking mechanism, and protective cover.

[0035] Figure 19 This is a schematic diagram showing the lifting and adjusting rod at its top position.

[0036] Figure 20 This is a schematic diagram of the connection structure between the lifting adjustment rod and the lifting seat.

[0037] Figure 21 This is a schematic diagram of the third embodiment of the chair cushion installation structure.

[0038] Figure 22 This is a partial cross-sectional structural diagram of Embodiment 3.

[0039] Figure 23 , 24 This is a schematic diagram of the exploded structure of Example 3.

[0040] Figure 25 , 26 This is a schematic diagram of the connection structure between the clamping block and the lifting adjustment block.

[0041] Figure 27 This is a schematic diagram of the locking mechanism for locking and unlocking the shoulder pillow.

[0042] Figure 28-31 These are schematic diagrams of four different embodiments. Detailed Implementation

[0043] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0044] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," "equipped with," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] If the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "several" means one or more, "multiple" means two or more, and "above," "below," and "within" are all understood to include the stated number. Furthermore, the technical features of each embodiment can be arbitrarily combined. For the sake of brevity, not all possible combinations of the technical features in the embodiments are described; however, as long as these combinations of technical features do not contradict each other, they should be considered within the scope of this specification.

[0047] This utility model proposes a chair pillow installation structure.

[0048] Example 1, as Figure 1-14 As shown.

[0049] The chair cushion mounting structure of this embodiment includes a backrest frame 1 for mounting the backrest, a lifting adjustment rod 30 with a headrest 20 mounted on the top, and a shoulder pillow 40 for supporting the human shoulder; the shoulder pillow is located below the headrest and above the backrest, and is vertically mounted in the middle of the lifting adjustment rod.

[0050] like Figure 1-3 As shown, the headrest is installed at the top of the height adjustment rod, the shoulder pillow in the middle, and the backrest at the bottom, so that the headrest, shoulder pillow, and backrest are arranged sequentially from top to bottom to correspond to different parts of the human body. The bottom of the height adjustment rod is mounted on the backrest, allowing it to move the headrest and shoulder pillow up and down to adjust to different heights. The shoulder pillow, which supports the shoulders, is an independent cushion, not fixed to the top of the backrest, thus meeting the adjustment needs of different users. The shoulder pillow can be positioned on the height adjustment rod, so that the headrest and shoulder pillow are raised and lowered synchronously by raising and lowering the rod, which can maintain the distance between the headrest and shoulder pillow and improve the ease of operation. At the same time, the shoulder pillow can be adjusted relative to the height adjustment rod, thereby changing the distance between the shoulder pillow and the headrest. This allows for independent adjustment of the headrest and shoulder pillow, and also makes it easy to change the relative distance between the three cushions. In addition, the headrest can also be raised and lowered independently, thereby increasing the adjustment range and applicability of the chair cushions and meeting the needs of more users.

[0051] like Figure 4As shown, the backrest frame 1 includes a fixed base 11 and a lifting seat 12 that moves up and down relative to the base. The backrest is mounted on the lifting seat, and the lifting adjustment rod 30 is movably mounted on the lifting seat, allowing the backrest to move up and down with the lifting seat. This allows the headrest, shoulder pillow, and backrest to be adjusted to the desired height. Furthermore, the lifting of the backrest can simultaneously lift the headrest and shoulder pillow, further increasing the adjustment range. Figure 5-9 As shown, the base is provided with a vertically arranged guide groove, and several positioning slots 13 are provided on both sides of the guide groove along the vertical direction, and the positioning slots are inclined upward; the lifting seat is equipped with two horizontally opposite positioning blocks 14, one end of the two positioning blocks is rotatably installed on the lifting seat, and the other end of the two positioning blocks is a clamping part 15. Between the middle of the two positioning blocks, there are respectively a clamping component 16 and a positioning elastic element 17 that are mutually clamped and fixed. The positioning elastic element applies a force to the positioning blocks pointing towards the positioning slots; the top of the guide groove is a clamping guide part 18 that applies relative movement to the two positioning blocks and drives the clamping component to clamp and fix them together, and the bottom of the guide groove is provided with an unlocking guide block 19 that is inserted between the two positioning blocks and drives the clamping component to disengage from each other. The two positioning blocks can be locked into the positioning slots by the positioning elastic element. Because the positioning slots are tilted upwards, the lifting seat and its left and right backrests are fixed at a specific height to meet the needs of people of different builds. When the user needs to adjust the backrest height upwards, pulling the lifting seat upwards will move the positioning blocks to the uppermost positioning slots. Figure 9 As shown, when the height needs to be adjusted downwards, the lifting seat moves the positioning blocks to the locking guide. The two positioning blocks, under the action of the locking guide, move relative to each other until the locking assembly between the two positioning blocks is fixed, preventing them from springing back into the positioning slots. At this point, the lifting seat descends to the bottom of the guide slot, and the locking assembly is unlocked by unlocking the guide block. The two positioning blocks spring back open under the action of the positioning elastic element. Then, the user can adjust the lifting seat and backrest to the desired height using the aforementioned method. This type of backrest frame has a simple and compact adjustment structure, allowing for easy setup and installation. It is also simple and convenient to use, and can stably position the backrest at the desired height. The positioning elastic element 17 can be as follows... Figure 7-9 The compression spring shown can also be an elastic coil or an elastic sheet, or other elastic device. Additionally, the engaging assembly 16 includes a slot and a block portion respectively disposed on the two positioning blocks 14. The slot portion has a concave groove, and the end of the block portion can be inserted and fixed into the slot, thereby facilitating engaging and fixing. Furthermore, as... Figure 7The base 11 has a lifting limit groove 101, and a liftable lifting limit plate 102 is also installed on the base. A lifting limit component 103 is installed in the lifting limit groove and connects the lifting limit plate and the lifting seat 12, thereby improving the stability and accuracy of the lifting seat's movement and preventing the lifting seat from falling off or swaying back and forth during lifting. Two vertically arranged guide bars 10 are arranged side-by-side on the base 11. The lifting limit plate 102 and the middle of the lifting seat 12 are both located between the two guide bars, thus limiting and guiding the lifting seat laterally through the guide bars, preventing the lifting seat from swaying left and right during lifting. Figure 7-9 As shown, a vertically arranged guide component is provided between the base 11 and the lifting seat 12, such as a groove and a convex strip that fit together, or a limiting convex strip provided on both sides of the lifting seat, so as to improve the accuracy of lifting and adjustment.

[0052] like Figure 2 , Figure 4-6 As shown in Figures 10-12, the base 11 and the lifting seat 12 are arranged opposite each other front and rear. The lifting adjustment rod 30 is installed on the inner side of the lifting seat. This effectively prevents the headrest and the lifting adjustment rod from protruding from the rear side of the back frame, allowing the back frame or the base of the back frame to protect the lifting adjustment rod, thereby greatly reducing the probability of pedestrian collisions. This makes the headrest and the lifting adjustment rod more stable and allows them to be closer to the user, making them more convenient to use. Furthermore, the distance from the rear side of the back frame further reduces the probability of collisions with pedestrians and improves the chair's aesthetics. Compared to some chairs without a back frame that directly place the lifting adjustment rod on the backrest, or chairs with a back frame that directly place the lifting adjustment rod on the back frame, this obviously avoids collisions, making it safer and more stable. Also, as... Figure 4 and Figure 10-13 As shown, the lifting seat 12 has baffles 122 on both sides of its back, and guide plates 123 on the inner sides of the two baffles. The lifting adjustment rod 30 is positioned between the two baffles to ensure aesthetic appearance. Lifting guide grooves 301 are provided on both sides of the lifting adjustment rod. The lifting guide grooves and guide plates can be inserted into each other in a relatively movable manner, thus providing guidance and limiting functions. The back of the lifting seat has ball grooves 504 and balls 501 installed in the ball grooves. A ball spring 502 is provided between the bottom of the ball groove and the ball. Several ball groove points 50 are vertically arranged along the upper edge of the lifting adjustment rod. The ball springs press the balls onto the ball groove points to form a lock. When the lifting adjustment rod moves up and down, it presses the balls into the ball grooves and drives the different ball groove points to cooperate with the balls for repositioning, thereby realizing the lifting and fixing adjustment of the headrest. Figure 4 and Figure 10-13As shown, the shoulder pillow 40 is installed in front of the lifting adjustment rod 30. An adjustment seat is provided on the back of the shoulder pillow, and the adjustment seat is equipped with a cover plate 122 identical to the rear side of the lifting seat 12. Guide plates 123 are also provided on the inner sides of the two cover plates, so that the tops of the shoulder pillow's adjustment seat and the lifting seat are opposite each other. This satisfies the adjustment needs while maintaining the chair's aesthetics. The guide plates on the shoulder pillow are inserted into the guide grooves on the lifting adjustment rod. Simultaneously, the adjustment seat also has a ball groove 504 and a ball 501. A ball spring 502 is provided between the bottom of the ball groove and the ball. The ball spring presses the ball against the ball groove point of the lifting adjustment rod to form a lock, allowing the shoulder pillow to move up and down relative to the lifting adjustment rod and be fixed, thus achieving adjustment. Alternatively, a positioning ball assembly with its own spring can be directly placed in the ball groove of the lifting seat 12 or the adjustment seat, including a ball cylinder 503 with a ball 501 for holding the ball, and a ball spring 502 inside the ball cylinder, which can also achieve the same function.

[0053] It is understandable that in some other embodiments, the ball spring may not be installed in the ball groove; instead, the ball itself may be installed in the ball groove. The elasticity of the plastic material itself can then be used to pull the lifting adjustment rod, causing the ball groove on the lifting adjustment rod to align with the ball and form a lock. Obviously, in other embodiments, the ball, ball spring, or positioning ball can be placed on the lifting adjustment rod, while the ball groove is located on the lifting seat 12 and the shoulder pillow's adjustment seat, thus achieving the same lifting adjustment and fixing functions.

[0054] In some embodiments, by appropriately setting or adjusting the magnitude of the interaction forces between the components, for example, the elastic force of the ball springs 502 installed on the adjusting seat and the lifting seat 12 acting on the lifting adjusting rod 30 can be the same or different, thereby meeting different adjustment needs. Some specific examples include ball springs installed on the lifting seat 12 having greater deformation strength, and the elastic force acting on the lifting adjusting rod being greater than the elastic force acting on the lifting adjusting rod by the ball springs installed on the shoulder pillow. This makes the ball springs on the lifting seat 12 more difficult to deform, allowing the shoulder pillow to rise and fall more easily independently, while pulling the shoulder pillow makes it difficult or impossible to drive the headrest to rise and fall. Conversely, it makes it more difficult or impossible for the shoulder pillow to rise and fall directly and independently, making it easy to drive the headrest to rise and fall synchronously when the shoulder pillow is pulled, or easy to drive the shoulder pillow to rise and fall synchronously when the headrest is pulled. When it is necessary for the headrest and shoulder pillow to rise and fall relatively independently, the headrest or shoulder pillow can be pressed down or the shoulder pillow locked, thereby allowing the headrest and shoulder pillow to rise and fall relatively independently. It is understandable that changing the elastic force of the ball spring acting on the lifting adjustment rod 30 can be achieved by changing the depth of the ball groove 504 or ball cylinder 503 of the adjusting seat or lifting seat 12, or the ball groove point of the lifting adjustment rod; or by changing the distance between the adjusting seat or lifting seat and the lifting adjustment rod, thereby making the compression of the ball spring on the ball different; or by changing the number, length, number of coils, material, etc. of the ball spring to achieve a change in the deformation strength of the ball spring, ultimately making the elastic force of the ball spring 502 of the adjusting seat and lifting seat 12 acting on the lifting adjustment rod 30 the same or different. In addition, in some other embodiments, the above-mentioned structure and principle of achieving different adjustment needs by changing the elastic force of the ball spring, the depth of the ball groove point, the distance between the components, etc., can be applied not only to back frames with lifting seats, but also to fixed back frames or backrests, to relatively adjust the headrest and shoulder pillow, making the headrest and shoulder pillow easier to lift independently or more inclined to lift in conjunction.

[0055] Similarly, in some embodiments, the magnitude of the interaction force between the components can be appropriately set or adjusted so that the required force to drive the headrest, shoulder pillow, and lifting seat to rise and fall are different. For example, the elasticity of the ball springs on the shoulder pillow and the lifting seat, as well as the elasticity of the positioning elastic element on the lifting seat, can be adjusted. Alternatively, the weight of the lifting seat and / or the backrest connected to the lifting seat can be increased so that the force required to pull the lifting seat 12 relative to the base 11 to rise and fall is greater than the force required to pull the lifting adjustment rod 30 relative to the lifting seat 12 to rise and fall. In this case, when the headrest or shoulder pillow is pulled to rise and fall, the lifting seat 12 is more difficult or will not rise and fall, thus making it more difficult or even impossible for the headrest or shoulder pillow to rise and fall, thereby making the headrest, shoulder pillow, and backrest more inclined to independently adjust their height. Conversely, the force required to raise or lower the lifting seat 12 relative to the base 11 can be less than the force required to raise or lower the lifting adjustment rod 30 relative to the lifting seat 12. When the headrest or shoulder pillow is pulled, it is easier to raise or lower the lifting seat or backrest, making it easier to achieve linkage lifting and lowering adjustment of two or all three of the headrest, shoulder pillow, and backrest.

[0056] like Figure 10-12 As shown, the bottom of the shoulder pillow 40 is provided with a headrest slot 401, and the top of the lifting seat 12 is provided with a positioning block 121 that can be inserted into the headrest slot. When the shoulder pillow moves down to the top of the lifting seat, the headrest slot is fitted onto the positioning block, thereby achieving mutual positioning and making the shoulder pillow and the lifting seat form an almost integrated structure, thereby improving the support function of the shoulder pillow.

[0057] In addition, in some embodiments, such as Figure 10 and Figure 13 The back of the lifting seat 12 is provided with a vertically recessed lifting limit groove 124. The lifting adjustment rod 30 is provided with a lifting limit block 302 located in the lifting limit groove and moving along the lifting limit groove, so as to improve the limitation of the stroke of the lifting adjustment rod and avoid excessive lifting movement of the headrest. Of course, in some other embodiments, there may be no lifting limit block, allowing for more free adjustment. When maintenance is required, the entire headrest and shoulder pillow can be pulled out separately for repair, cleaning or replacement.

[0058] like Figure 1 , 2As shown, the headrest 20 is rotatably mounted on the top of the lifting adjustment rod 30 via a rotating adjustment rod 60. This allows for increased adjustment range through rotation and also brings the headrest closer to the user for easier use. The backrest includes a left backrest 2 and a right backrest 3 arranged opposite each other, and a spinal backrest 8 positioned between the left and right backrests. The spinal backrest is vertically positioned and opposite the human spine. The left backrest, spinal backrest, and right backrest are each independently configured. Dividing the backrest into three parts—left, middle, and right—corresponds to the left side, middle of the spine, and right side of the human back, respectively. When the user sits back in the chair, the left and right backrests support the left and right sides of the user's back, while the spinal backrest supports the middle of the spine, providing necessary support for different parts of the body and creating a better support effect. The use of the spinal backrest also better conforms to the curve of the human spine, thereby improving user comfort. The spinal backrest can be installed on the back frame via the spinal elastic element 9. Different numbers of spinal backrests can be set as needed to form one or more spinal backrests. Each spinal backrest can be connected to only one spinal elastic element 9, or more than two spinal elastic elements can be installed as needed to meet various needs for fitting and supporting the spine. The left backrest 2 and right backrest 3 are rotatably installed on the back frame via the elastic mechanism 4. They have horizontal or diagonal brackets. One end of the bracket is rotatably connected to the left backrest 2 or right backrest 3 via the elastic mechanism, and the other end of the bracket is rotatably connected to the back frame via the elastic mechanism, so that the left and right backrests can better rotate to fit and support the back or waist.

[0059] like Figure 14As shown, the top of the lifting adjustment rod 30 has two recessed adjustment truncated cones on its two sides. The ends of the rotating adjustment rod 60 are located on both sides of the adjustment truncated cones. The tops of the rotating adjustment rod and the lifting adjustment rod have through holes that are arranged opposite to each other. The through holes of the rotating adjustment rod are fitted with a rotating adjustment block 70 and a rotating pressure block 90. ​​The bottom of the adjustment truncated cone contacts the side of the rotating adjustment block and has mutually convex and concave adjustment teeth 303 and 701 arranged in the circumferential direction. The rotating adjustment block and the rotating pressure block are fitted with headrest compression springs 100. The bolt 200 passes through the rotating pressure block, the headrest compression spring and the rotating adjustment block and is screwed to the nut 400 (or a matching threaded sleeve or other existing screw connection structure), thereby pressing the rotating adjustment block against the adjustment truncated cone. The angle of the rotating adjustment rod and the headrest is adjusted by their rotation along the contact surface. The outer wall of the end of the rotating adjustment rod 60 is provided with a rotation limiting groove 61 along the rotation direction. A rotation limiting block 304 protrudes from the lifting adjustment rod 30 and is located in the rotation limiting groove, thereby limiting the rotation amplitude of the rotating adjustment rod and preventing excessive rotation. Of course, in some other embodiments, the limiting block may be omitted to allow for more flexible rotation or a larger rotation angle. In addition, mounting limiting blocks 62 and 702 are provided between the inner wall of the through hole of the rotating adjustment rod 60 and the rotating adjustment block 70 to limit their relative circumferential rotation, so as to transmit the interaction force. When the user pulls the headrest to rotate, the rotating adjustment rod will drive the rotating adjustment block to rotate through the interaction of the mounting limiting blocks. A decorative cover 300 is also installed at the through hole to improve the aesthetics and protect the internal components.

[0060] The chair cushion installation structure described above, such as Figure 2 The back frame 1 is equipped with a clothes rod 80 for hanging clothes.

[0061] It is understood that in some other embodiments, the end of the lifting adjustment rod 30 may also be integrally or detachably connected to a fixed headrest, or connected to a headrest with other rotating structures, or connected to a headrest with other adjustment functions, such as a headrest with front and rear adjustment and locking functions, or a headrest with both front and rear and rotation adjustment and locking functions, or a headrest with two or more sets of front and rear rotating shafts, so that the headrest can be lifted, rotated and adjusted front and back.

[0062] Example 2, as Figure 15-20 As shown.

[0063] The chair cushion mounting structure described above allows for the installation of a locking mechanism between the back frame 1 and the shoulder pillow 40, enabling them to lock or unlock each other. Figure 15-17As shown, the device includes a locking plate 601 hinged to the shoulder pillow 40. A locking spring 602 is installed between one end of the locking plate and the shoulder pillow, and a locking hook 603 is provided at the other end of the locking plate. A locking block 604, which locks against the locking hook, is provided on the back frame. The top surface of the locking block is inclined so that when the shoulder pillow is lowered, the locking hook can move along the inclined surface and automatically hook onto the bottom surface of the locking block. The locking spring applies a pushing force to one end of the locking plate, causing the locking hook at the other end of the locking plate to lock against the locking block, thereby fixing the shoulder pillow and back frame relatively. At this time, pulling... Moving the headrest or adjusting lever will not raise or lower the shoulder pillow, making it easier to adjust the headrest independently. When it is necessary to adjust the shoulder pillow simultaneously or separately, the locking plate can be pressed to disengage the locking hook of the locking plate from the locking block of the back frame. Additionally, the back frame 1 can be equipped with a stop 605 that abuts against one end of the locking plate 601. The locking spring and the stop are respectively located on both sides of the locking plate. The locking spring pushes the locking plate and presses it against the stop, thereby increasing the locking strength and preventing the locking plate from falling off. Furthermore, the bottom surface of the locking hook 603 and the top surface of the locking block 604 are both inclined, allowing the locking hook to automatically engage with the locking block when the shoulder pillow descends, thus improving operational convenience. Furthermore, as... Figure 18 As shown, a protective cover 606 is provided outside the locking mechanism to protect the components of the locking mechanism, and the top of the locking plate 601 extends out of the protective cover for operation.

[0064] In some embodiments, such as Figure 16 , 19 As shown, the bottom of the lifting adjustment rod 30 has two limiting hooks 305 on both sides that can abut against the baffle plate 122, forming a limiting structure for the lifting adjustment rod when it is raised to its highest point, preventing the lifting adjustment rod from rising excessively and falling off; at the same time, a deformation groove 306 is provided between the middle of the bottom of the lifting adjustment rod 30 and the limiting hooks 305 on both sides. Furthermore, the bottom of the limiting hook 305 is inclined, so that the lifting adjustment rod can be inserted between the two baffle plates during installation, and the limiting hook is bent towards the deformation groove by inward pressing until the limiting hook passes over the baffle plate and completes the insertion before popping out, thus forming a limit; when disassembling, the limiting hook is compressed towards the middle and disengaged from the baffle plate, at which point the lifting adjustment rod can be pulled out from the back frame, as shown. Figure 20 As shown, this facilitates the assembly, disassembly, and maintenance of components. Of course, if it is desired to pull out the headrest or shoulder pillow directly for easy maintenance or replacement, the structure of the limit hook 305 and deformation groove 306 can be omitted.

[0065] Example 3, as Figure 21-27 As shown.

[0066] The locking mechanism of this embodiment includes a pressing block 611 fixedly installed on the shoulder pillow 40 and a lifting adjustment block 612 rotatably installed on the shoulder pillow in the middle. A locking spring 602 is installed between the top of the lifting adjustment block and the pressing block. A locking hook 603 is provided on the side of the bottom of the lifting adjustment block facing the back frame 1, and the bottom of the locking hook is inclined. The back frame is provided with a locking groove 613 that engages with the locking hook. The lifting adjustment block is also provided with a pressing part 614 protruding from the surface of the shoulder pillow. When the shoulder pillow is raised, the horizontal height of the locking hook is higher than the locking groove, and the two will not engage with each other. When it is necessary to fix the shoulder pillow to the back frame, the shoulder pillow is moved downward, and the bottom of the locking hook abuts against the top of the back frame and compresses the locking spring until the locking hook moves to the locking groove and engages with each other. The shoulder pillow is then fixed to the back frame and will not be adjusted in height with the headrest. The clamping block is detachably mounted on the shoulder pillow 40 by screws 615, and the shoulder pillow is provided with an arc-shaped groove 616. The lifting adjustment block 612 is provided with a rotating column 617 placed in the arc-shaped groove, and the clamping block 611 is provided with a clamping part 618 abutting against the rotating column. Figure 27 (a) When the locking hooks are engaged with each other in the locking slots, the shoulder pillow is secured to the back frame. For example... Figure 27 (b) When the pressing part 614 is pressed, the lifting adjustment block rotates around the rotating column, thereby disengaging the locking hook 603 from the locking groove 613. At this time, the shoulder pillow is raised upwards so that the locking hook is higher than the locking groove, thus unlocking the shoulder pillow. Furthermore, the bottom of the locking hook 603 is a slope, and the top of the lifting seat is an arc surface. When the shoulder pillow is moved downwards, the bottom of the locking hook abuts against the top of the lifting seat, causing the lifting adjustment block to automatically rotate under the action of the locking spring until the locking hook and the locking groove are locked together.

[0067] The shoulder pillow using the chair cushion mounting structure described in this utility model can be a single, complete shoulder pillow, such as... Figure 28 Multiple pillows can also be installed on the frame of a shoulder pillow. These pillows can be spaced apart as needed, or they can be placed close together to form two or more shoulder pillow structures, such as... Figure 29 Two shoulder pillows and Figure 30 The shoulder pillows can be three or more. The shoulder pillows can also consist of multiple relatively independent shoulder pillow frames and cushions mounted on each frame. The individual shoulder pillows can be connected to each other integrally or detachably via a shoulder pillow connecting mechanism 700, such as plastic, elastic sheets, or other elastic mechanisms. Figure 31 .

[0068] This utility model also proposes a chair equipped with the chair cushion mounting structure described above. This allows it to be applied to chairs, thereby providing support for different parts of the user's body such as the head, shoulders, and back, and achieving the beneficial effects of the chair cushion mounting structure described above.

[0069] The following uses a chair with the aforementioned cushion mounting structure as an example to illustrate some specific operations and usage methods, including but not limited to: Figure 3 As shown, by pulling the backrest, the adjustable seat is activated, which in turn raises the headrest and shoulder pillows together; or by pulling the headrest, the shoulder pillows are raised together; or by pulling the shoulder pillows, the headrest is raised independently by holding the shoulder pillows down or by locking them with the locking mechanism. This provides better shoulder support. Furthermore, these functional parts can be used individually or in combination to meet different user support needs.

[0070] The above description is merely a preferred embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the content of this specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model. In the description of this utility model, the terms "one embodiment," "some embodiments," "embodiment," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Those skilled in the art will understand, explicitly and implicitly, that, without conflict, the embodiments described herein can be combined with other embodiments, and the embodiments of this utility model and the features within those embodiments can be combined with each other.

Claims

1. A chair cushion mounting structure, comprising a backrest frame (1) for mounting the backrest and a lifting adjustment rod (30) with a headrest (20) mounted on top, characterized in that: There is a shoulder pillow (40) for supporting the human shoulder. The shoulder pillow is located below the head pillow and above the backrest, and is installed in the middle of the lifting adjustment rod (30) in a height-adjustable manner.

2. The chair cushion installation structure according to claim 1, characterized in that: The backrest (1) includes a fixed base (11) and a lifting seat (12) that moves up and down relative to the base. The backrest is installed on the lifting seat, and the lifting adjustment rod (30) is installed on the lifting seat in a lifting manner.

3. The chair cushion installation structure according to claim 2, characterized in that: The lifting seat (12) has two shielding plates (122) on the back side, and guide plates (123) are provided on the inner side of the two shielding plates respectively. The lifting adjustment rod (30) is located between the two shielding plates, and lifting guide grooves (301) are provided on both sides of the lifting adjustment rod respectively. The lifting guide grooves and guide plates can be inserted into each other in a relatively movable manner.

4. The chair cushion installation structure according to claim 3, characterized in that: The shoulder pillow (40) is installed in front of the lifting adjustment rod (30). The back of the shoulder pillow is provided with an adjustment seat. The adjustment seat is equipped with a baffle plate (122). The inner sides of the two baffle plates are respectively provided with guide plates (123). The guide plates are inserted into the guide groove on the lifting adjustment rod. The lifting adjustment rod is provided with several ball grooves (50) along the vertical direction. The adjustment seat is provided with ball grooves (504) and balls (501) installed in the ball grooves and cooperating with the ball grooves of the lifting adjustment rod. A ball spring (502) is provided between the bottom of the ball groove and the ball. The lifting adjustment rod moves up and down and drives different ball grooves to cooperate with the balls.

5. The chair cushion installation structure according to claim 2, 3 or 4, characterized in that: The back of the lifting seat (12) is provided with a ball groove (504) and a ball (501) installed in the ball groove. A ball spring (502) is provided between the bottom of the ball groove and the ball. Several ball groove points (50) are provided vertically along the upper edge of the lifting adjustment rod. The lifting adjustment rod moves up and down and drives different ball groove points to cooperate with the ball.

6. The chair cushion installation structure according to claim 5, characterized in that: The ball springs (502) installed on the adjusting seat and the lifting seat (12) exert the same or different elastic forces on the lifting adjusting rod (30).

7. The chair cushion installation structure according to claim 2, characterized in that: The bottom of the shoulder pillow (40) is provided with a headrest slot (401), and the top of the lifting seat (12) is provided with a positioning block (121) that can be inserted into the headrest slot.

8. The chair cushion mounting structure according to claim 3 or 4, characterized in that: The bottom of the lifting adjustment rod (30) is provided with limit hooks (305) on both sides that can abut against the baffle plate (122), and a deformation groove (306) is provided between the middle of the bottom of the lifting adjustment rod and the limit hooks on both sides.

9. The chair cushion mounting structure according to any one of claims 1-4 and 7, characterized in that: A locking mechanism is installed between the back frame (1) and the shoulder pillow (40) to lock or unlock them.

10. The chair cushion mounting structure according to claim 9, characterized in that: The locking mechanism includes a locking plate (601) hinged to the shoulder pillow (40), a locking spring (602) between one end of the locking plate and the shoulder pillow, a locking hook (603) at the other end of the locking plate, and a locking block (604) on the back frame that locks with the locking hook; a stop block (605) abutting against one end of the locking plate is also provided on the back frame (1), the locking spring and the stop block are respectively provided on both sides of the locking plate; and the bottom surface of the locking hook and the top surface of the locking block are both inclined.

11. The chair cushion mounting structure according to claim 10, characterized in that: A protective cover (606) is provided on the outside of the locking mechanism.

12. The chair cushion installation structure according to claim 9, characterized in that: The locking mechanism includes a pressing block (611) fixedly installed on the shoulder pillow (40) and a lifting adjustment block (612) rotatably installed on the shoulder pillow in the middle. A locking spring (602) is installed between the top of the lifting adjustment block and the pressing block. A locking hook (603) is provided on the side of the bottom of the lifting adjustment block facing the back frame (1), and the bottom of the locking hook is inclined. A locking groove (613) is provided on the back frame to engage with the locking hook. A pressing part (61) protruding from the surface of the shoulder pillow is also provided on the lifting adjustment block.

13. The chair cushion mounting structure according to claim 12, characterized in that: The shoulder pillow is provided with an arc-shaped groove (616), the lifting adjustment block (612) is provided with a rotating column (617) placed in the arc-shaped groove, and the pressing block (611) is provided with a pressing part (618) that abuts against the rotating column.

14. The chair cushion mounting structure according to any one of claims 1-4 and 7, characterized in that: The headrest (20) is rotatably mounted on the top of the lifting adjustment rod (30) via the rotating adjustment rod (60).

15. The chair cushion mounting structure according to claim 14, characterized in that: The top of the lifting adjustment rod (30) has recessed adjustment truncated cones on both sides. The ends of the rotating adjustment rod (60) are located on both sides of the adjustment truncated cones. The tops of the rotating adjustment rod and the lifting adjustment rod have through holes that are arranged opposite to each other. The through holes of the rotating adjustment rod are equipped with a rotating adjustment block (70) and a rotating pressure block (90). The bottom of the adjustment truncated cone contacts the side of the rotating adjustment block and is provided with mutually concave and convex adjustment teeth (303, 701) along the circumference. The rotating adjustment block and the rotating pressure block are provided with headrest springs (100). The bolt (200) passes through the rotating pressure block, the headrest spring and the rotating adjustment block and is screwed to the nut (400).

16. The chair cushion mounting structure according to any one of claims 1-4 and 7, characterized in that: The backrest includes a left backrest (2) and a right backrest (3) set opposite to each other on the left and right sides, and a spinal backrest (8) set between the left backrest and the right backrest.

17. A chair, characterized in that: It is equipped with a chair cushion mounting structure as described in any one of claims 1-16.

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