Heat preservation cushion

Abstract

A positioning cloth cover is mounted at two folded corners at the top of a backrest of an office chair for fixation, and a connecting part is wound for multiple times under the deformation of the backrest to penetrate through a long-strip-shaped hole, so that the height of the backrest is adjusted, and the height of the backrest is matched with the height of the backrest of the office chair of a corresponding model; the cushion is fixed on the office chair by matching with a binding belt, so that the purpose of preventing the heat-preservation cushion from loosening and slipping in the use process is finally achieved; meanwhile, the connecting part is wound for multiple times under the deformation of the back cushion to penetrate through the long-strip-shaped hole to form a supporting protruding area used for supporting the back, the waist of the user can be well supported, and the user experience is improved; in addition, due to the fact that the rest part of the back cushion is too long or too short in the winding process, the cushion can be flatly laid on the chair surface of the office chair through the deformation of the extending part which extends upwards in cooperation with the tightness degree in the winding process at the moment.

Description

Technical Field

[0001] The invention relates to the technical field of household products, in particular to a thermal insulation cushion. Background Art

[0002] Thermal cushions are seat accessories designed to provide warmth and comfort, usually used in car seats, home seats or office chairs. Thermal cushions are usually made of memory foam, and their main function is to provide warmth and reduce the impact of cold environments on the human body.

[0003] The structure of the heat preservation seat cushion with backrest function includes a seat cushion, a backrest connected to the seat cushion, a first binding belt arranged on the seat cushion, and a second binding belt arranged on the backrest. When the heat preservation seat cushion is installed on an office chair with a backrest, it is bound to the office chair by the first binding belt and the second binding belt, so as to be fixed.

[0004] However, when the thermal insulation cushion is only fixed by some binding straps, the seat cushion and back cushion of the thermal insulation cushion are prone to become loose and slippery during use, which has a great impact on the user experience. Summary of the invention

[0005] The purpose of the present invention is to provide a thermal insulation cushion, which can prevent the thermal insulation cushion from becoming loose and slipping during use and can provide good support for the user's waist.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a thermal insulation cushion, comprising a seat cushion and a back cushion connected to the seat cushion, the rear side of the seat cushion being provided with an extension portion extending upward and having a long strip hole, the lower end of the back cushion being provided with a connecting portion connected to the extension portion and having a width less than the length of the strip mounting hole, the connecting portion being wound through the long strip hole multiple times under the deformation of the back cushion to form a supporting protruding area for supporting the back, positioning cloth covers being provided on both sides of the top of the back cushion for respectively being sleeved on the two corners of the top of the backrest of the office chair, and binding straps for binding to the office chair being provided on both sides of the seat cushion.

[0007] By adopting the above technical solution, first, since the heights of the backrests of office chairs of different models are different, when proposing a fixing method for installing the positioning cloth cover at the two folding corners at the top of the backrest of the office chair, it is necessary to make the height of the cushion adjustable to avoid the situation where the length of the cushion is too short, resulting in the separation of the seat cushion from the seat surface of the office chair, or the length of the cushion is too long. Further, when solving the function of the adjustable height of the cushion, an extension part that extends upward and has a long strip-shaped hole is provided at the rear side of the seat cushion, and a connecting part is provided at the lower end of the cushion. The connecting part winds through the long strip-shaped hole multiple times under the deformation of the cushion to adjust the height of the cushion so as to match the height of the backrest of the corresponding model of office chair. The seat cushion is fixed on the office chair with the cooperation of the binding belt, and finally the purpose of preventing the heat preservation seat cushion from slipping during use is achieved; at the same time, the connecting part winds through the long strip-shaped hole multiple times under the deformation of the cushion to form a supporting protrusion area for supporting the back, which can also provide good support for the user's waist and improve the user experience; in addition, during the winding process, the remaining part of the cushion may be too long or too short. At this time, with the cooperation of the tightness during winding and the deformation of the upward extending extension part, when the positioning cloth cover is installed at the two folding corners at the top of the backrest of the office chair, the seat cushion can be laid flat on the seat surface of the office chair.

[0008] A further setting of the present invention is that: a strip-shaped connecting sleeve is provided at the connection between the extension part and the connecting part, a connecting shaft is penetrated through the connecting sleeve, and adjusting mechanisms for fixing on the backrest of the office chair and realizing the adjustment of the distance from the backrest are provided at both ends of the connecting shaft; the adjusting mechanism includes two symmetrically arranged "U"-shaped fastening sleeves for fixing on the two side edges of the backrest of the office chair, locking pieces provided on the fastening sleeves for pressing against the backrest of the office chair, two connecting sleeves installed at both ends of the connecting shaft, and a distance adjusting structure provided between the fastening sleeve and the connecting sleeve for realizing the adjustment of the distance between the two.

[0009] By adopting the above technical solution, the connection between the extension part and the connecting part is close to the winding center of the supporting protrusion area formed by the connecting part. At this time, by providing the connecting shaft, hard and flexible support for the user's waist can be realized, and the support performance can be improved; and adjusting mechanisms for fixing on the backrest of the office chair and realizing the adjustment of the distance from the backrest are provided at both ends of the connecting shaft, so that the position of the supporting protrusion area can be adjusted to better provide good support for the user's waist; at the same time, through the setting of the adjusting mechanism, the connecting shaft can be connected to the office chair, further preventing the heat preservation seat cushion from slipping after installation.

[0010] The present invention is further configured as follows: the spacing adjustment structure includes a first wedge-shaped block arranged on the snap-fit ​​sleeve and having a first inclined surface, and a second wedge-shaped block arranged on the connecting sleeve and having a second inclined surface, wherein a sliding groove is arranged on the first inclined surface, and a sliding block slidably connected in the sliding groove is arranged on the second inclined surface, and the lower end of the first wedge-shaped block extends downwardly in an inclined direction close to the connecting sleeve.

[0011] By adopting the above technical solution, the connection between the snap-fit ​​sleeve and the connecting sleeve is achieved by setting the first wedge block and the second wedge block. Since the height positions of the connecting shaft and the connecting sleeve are relatively fixed, the installation height of the snap-fit ​​sleeve on the edges of the backrest of the office chair can be adjusted. At this time, the front and rear position of the connecting shaft can be adjusted (that is, the spacing between the snap-fit ​​sleeve and the connecting sleeve can be adjusted) by cooperating with the first inclined surface of the first wedge block and the second inclined surface of the second wedge block.

[0012] The present invention is further configured as follows: a plug-in sleeve in the form of a regular polygon is provided on the snap-fit ​​sleeve, and the spacing adjustment structure includes a first threaded shaft with one end fixed on the connecting sleeve, a second threaded shaft with one end plugged into the plug-in sleeve and with a thread direction opposite to that of the first threaded shaft, and a bidirectional threaded sleeve with two ends respectively threadedly connected to the first threaded shaft and the second threaded shaft.

[0013] By adopting the above technical solution, when adjusting the spacing between the snap-fit ​​sleeve and the connecting sleeve, the first threaded shaft and the second threaded shaft can be moved closer to or farther away from each other by rotating the bidirectional threaded sleeve, thereby adjusting the overall length of the spacing adjustment structure, thereby adjusting the spacing between the snap-fit ​​sleeve and the connecting sleeve; in addition, the design of the second threaded shaft and the plug-in sleeve of the snap-fit ​​sleeve being plugged in facilitates assembly and disassembly.

[0014] The present invention is further configured as follows: the spacing adjustment structure includes a first telescopic tube arranged on the buckle sleeve, a first telescopic rod with one end arranged on the connecting sleeve and the other end telescopically arranged in the first telescopic tube, and a limiting member arranged between the first telescopic tube and the first telescopic rod; a mounting hole is arranged on the top of the first telescopic tube, a telescopic hole corresponding to the mounting hole is arranged on the bottom of the first telescopic tube, a waist-shaped hole is arranged on the first telescopic rod, and the limiting member includes a limiting tooth block embedded in the mounting hole, a limiting shaft arranged on the lower surface of the limiting tooth block and passing through the waist-shaped hole and the telescopic hole, a locking nut threadedly connected to the lower end of the limiting shaft, and a rack arranged on the first telescopic rod and located on both sides of the waist-shaped hole, and the limiting tooth block is meshed with the rack.

[0015] By adopting the above technical solution, when adjusting the spacing between the snap-fit ​​sleeve and the connecting sleeve, first loosen the locking nut so that the limiting tooth block and the limiting shaft can move upward, thereby separating the limiting tooth block and the rack. At this time, the length of the first telescopic rod in the first telescopic tube can be adjusted. After adjustment, tighten the locking nut so that the limiting tooth block and the rack are re-engaged, thereby achieving limited fixation of the first telescopic rod.

[0016] The present invention is further configured as follows: the connecting sleeve is threadedly connected to the end of the connecting shaft; a reinforcing structure located on the rear side of the backrest of the office chair is arranged between the rear sides of the two snap-fit ​​sleeves, mounting grooves are symmetrically arranged on the two snap-fit ​​sleeves, and notches communicating with the mounting grooves are symmetrically arranged on the two snap-fit ​​sleeves, and the reinforcing structure includes two embedded blocks embedded and tightly arranged in the two mounting grooves, a second telescopic tube arranged on one of the embedded blocks and passing through the notch, a second telescopic rod arranged on the other embedded block and passing through the notch, and a fixing bolt, one end of the second telescopic tube is telescopically arranged on the second telescopic tube, and the fixing bolt is arranged at one end of the second telescopic tube close to the second telescopic rod and is used to press tightly against the peripheral side of the second telescopic rod.

[0017] By adopting the above technical solution, when the two snap-fitting sleeves are installed, since the backrest widths of office chairs of different models are different, the connecting sleeve is threadedly connected to the end of the connecting shaft, so as to adjust the overall length of the two connecting sleeves and the connecting shaft to adapt to the installation of the two snap-fitting sleeves; at the same time, after the two snap-fitting sleeves are installed, the front sides of the two snap-fitting sleeves are reinforced by the setting of the adjustment mechanism and the connecting shaft, and the rear sides of the two snap-fitting sleeves are reinforced by the reinforcing structure, so as to increase the structural stability after the two snap-fitting sleeves are installed.

[0018] The present invention is further configured as follows: the locking member includes a locking bolt threadedly connected to the front side of the snap-fit ​​sleeve, a pressing plate rotatably arranged at the end of the locking bolt and located in the snap-fit ​​sleeve, and a rubber buffer plate arranged on the pressing plate and used to be pressed against the backrest of the office chair, and the locking bolt drives the pressing plate to move to be pressed against the edge of the backrest of the office chair.

[0019] By adopting the above technical solution, the locking member includes a locking bolt threadedly connected to the front side of the snap-fit ​​sleeve, and a pressing plate rotatably arranged at the end of the locking bolt and located in the snap-fit ​​sleeve. The locking bolt drives the pressing plate to move and is pressed against the edge of the backrest of the office chair. At the same time, the locking bolt is arranged on the front side of the snap-fit ​​sleeve. Compared with being arranged on the rear side of the snap-fit ​​sleeve, the locking bolt can be avoided from protruding and exposed on the rear side of the backrest of the office chair. In addition, there is an adjustment mechanism on the front side of the snap-fit ​​sleeve, which provides an accommodation space for the locking bolt.

[0020] The present invention is further configured as follows: the extension portion is provided with a zipper extending to the side surface and the elongated hole to open the elongated hole.

[0021] By adopting the above technical solution, when the connecting part is wound multiple times, the deformation of the cushion each time it passes through the long hole is large, which makes it inconvenient to wind it. By additionally arranging a zipper that can open the long hole, after the zipper is opened, it is convenient to complete multiple winding operations on the connecting part.

[0022] The present invention is further configured as follows: the thickness of the connecting portion is less than the thickness of the cushion, and the connecting portion is provided with a plurality of partition stitching lines arranged along the height direction of the connecting portion.

[0023] By adopting the above technical solution, the connecting part is used to be rolled up to form a supporting protruding area for supporting the back. At this time, a plurality of partitioning stitching lines are arranged along the height direction of the connecting part on the connecting part. At this time, the connecting part is partitioned along its height direction (length direction), so that the connecting part is more convenient to roll up.

[0024] The present invention is further configured as follows: the steps for installing the thermal insulation cushion on the office chair are as follows: (S1) First, measure the height of the backrest of the office chair, open the zipper, pass the connecting shaft through the connecting sleeve, wind the connecting part along the connecting shaft, close the zipper, and when the overall length of the extension part and the cushion is close to the height of the backrest of the office chair, respectively put the two positioning cloth covers on the top of the cushion on the two corners of the top of the backrest of the office chair; (S2) adjusting the tightness of the connection portion when it is rolled up and the deformation of the extension portion extending upward so that the seat cushion is laid flat on the seat surface of the office chair and is tied with a binding belt; (S3) Install snap-fit ​​sleeves on both sides of the backrest of the office chair and fix them with locking pieces, reinforce them with reinforcing structures, install connecting sleeves on both ends of the connecting shaft, and adjust the distance between the snap-fit ​​sleeves and the connecting sleeves through the distance adjustment structure between the snap-fit ​​sleeves and the connecting sleeves to provide a suitable back support effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of Example 1; Figure 2 is a structural schematic diagram of another viewing angle of Example 1; Figure 3 yes Figure 2 A partial schematic diagram of Figure 4 is a partial enlarged view of the adjustment mechanism in Example 1; Figure 5 is a side view of Example 2; Figure 6 It is a partial enlarged view of the adjustment mechanism in Example 2; Figure 7 is a partial enlarged view of the adjustment mechanism in Example 3; Figure 8 It is a structural schematic diagram of the snap-fit ​​sleeve, the connecting sleeve and the spacing adjustment structure in Example 3.

[0026] Reference numerals: 1, seat cushion; 11, extension portion; 111, long strip hole; 12, binding belt; 13, zipper; 2, cushion; 21, connection portion; 211, partition suture line; 22, positioning cloth cover; 3, connection sleeve; 4, connection shaft; 5, adjustment mechanism; 51, snap-fit ​​sleeve; 511, plug-in sleeve; 512, installation groove; 513, notch; 52, locking piece; 521, locking bolt; 522, pressing piece; 523, rubber buffer sheet; 53, connection sleeve; 54, spacing adjustment structure; 541, first wedge block; 5412, sliding groove; 542. Second wedge block; 5422. Sliding block; 543. First threaded shaft; 544. Second threaded shaft; 545. Bidirectional threaded sleeve; 546. First telescopic tube; 5461. Mounting hole; 5462. Telescopic hole; 547. First telescopic rod; 5471. Waist-shaped hole; 548. Limiting piece; 5481. Limiting tooth block; 5482. Limiting shaft; 5483. Locking nut; 5484. Rack; 55. Reinforcement structure; 551. Embedded block; 552. Second telescopic tube; 553. Second telescopic rod; 554. Fixing bolt. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0028] Embodiment 1: A heat-insulating cushion, such as Figure 1 and Figure 2 As shown, it includes a seat cushion 1 and a back cushion 2 connected to the seat cushion 1. The rear side of the seat cushion 1 is provided with an extension portion 11 extending upward and having a long strip hole 111. The lower end of the back cushion 2 is provided with a connection portion 21 connected to the extension portion 11 and having a width less than the length of the strip mounting hole 5461. The connection portion 21 is wound through the long strip hole 111 multiple times under the deformation of the back cushion 2 to form a supporting protruding area for supporting the back. At the same time, positioning cloth covers 22 for respectively covering the two corners of the top of the backrest of the office chair are provided on both sides of the top of the back cushion 2. Binding belts 12 for binding on the office chair are provided on both sides of the seat cushion 1. The binding belts 12 can be provided at the four corners of the seat cushion 1, and two are provided at each corner to achieve binding on the chair legs of the office chair.

[0029] like Figure 1 As shown, the extension portion 11 is provided with a zipper 13 extending to the side and the elongated hole 111 to open the elongated hole 111. The thickness of the connecting portion 21 is less than the thickness of the cushion 2, and the connecting portion 21 is provided with a plurality of partition stitching lines 211 arranged along the height direction of the connecting portion 21.

[0030] As shown Figures 1 to 3 in FIGS. 1 and 2, a strip-shaped connecting cloth sleeve 3 is provided at the connection between the extension part 11 and the connecting part 21. A connecting shaft 4 is penetrated through the connecting cloth sleeve 3. Adjusting mechanisms 5 for fixing on the backrest of the office chair and realizing the adjustment of the distance from the backrest are provided at both ends of the connecting shaft 4. The adjusting mechanism 5 includes two symmetrically arranged "U"-shaped fastening sleeves 51 for fixing on the two side edges of the backrest of the office chair, locking members 52 provided on the fastening sleeves 51 and used for pressing against the backrest of the office chair, two connecting sleeves 53 mounted at both ends of the connecting shaft 4, and a distance adjusting structure 54 provided between the fastening sleeve 51 and the connecting sleeve 53 and realizing the adjustment of the distance between the two.

[0031] As shown Figure 3 and Figure 4 in FIGS. 3 and 4, the locking member 52 includes a locking bolt 521 threadedly connected to the front side of the fastening sleeve 51, a pressing piece 522 rotatably arranged at the end of the locking bolt 521 and located inside the fastening sleeve 51, and a rubber buffer piece 523 provided on the pressing piece 522 and used for pressing against the backrest of the office chair. After the locking bolt 521 drives the pressing piece 522 to move, it presses against the edge of the backrest of the office chair.

[0032] As shown Figure 3 and Figure 4 in FIGS. 5 and 6, the distance adjusting structure 54 includes a first wedge-shaped block 541 provided on the fastening sleeve 51 and having a first inclined surface, a second wedge-shaped block 542 provided on the connecting sleeve 53 and having a second inclined surface. A sliding groove 5412 is provided on the first inclined surface, and a sliding block 5422 slidably connected in the sliding groove 5412 is provided on the second inclined surface. The lower end of the first wedge-shaped block 541 extends obliquely downward in the direction close to the connecting sleeve 53.

[0033] As shown Figure 2 and Figure 3 in FIGS. 7 and 8, the connecting sleeve 53 is threadedly connected to the end of the connecting shaft 4. A reinforcing structure 55 located at the rear side of the backrest of the office chair is provided between the rear sides of the two fastening sleeves 51. Mounting grooves 512 are symmetrically provided on the two fastening sleeves 51, and notches 513 communicating with the mounting grooves 512 are symmetrically provided on the two fastening sleeves 51. The reinforcing structure 55 includes two embedding blocks 551 embedded and tightly arranged in the two mounting grooves 512, a second telescopic tube 552 provided on one of the embedding blocks 551 and passing through the notch 513, a second telescopic rod 553 provided on the other embedding block 551 and passing through the notch 513, and a fixing bolt 554. One end of the second telescopic tube 552 is telescopically arranged on the second telescopic tube 552. The fixing bolt 554 is provided at one end of the second telescopic tube 552 close to the second telescopic rod 553 and used for pressing against the periphery of the second telescopic rod 553.

[0034] The steps for installing the thermal insulation cushion on the office chair are as follows: (S1) first measure the height of the backrest of the office chair, open the zipper 13, pass the connecting shaft 4 through the connecting cloth cover 3, and wind the connecting part 21 along the connecting shaft 4, close the zipper 13, and when the overall length of the extension part 11 and the cushion 2 is close to the height of the backrest of the office chair, respectively put the two positioning cloth covers 22 on the top of the cushion 2 on the two corners of the top of the backrest of the office chair; (S2) adjust the tightness of the connecting part 21 when winding and the deformation of the extension part 11 extending upward, so that the cushion 1 is laid flat on the seat surface of the office chair, and is tied with the binding belt 12; (S3) Install the buckle sleeve 51 on the edges of both sides of the backrest of the office chair, fix it with the locking piece 52, and reinforce it with the reinforcing structure 55, install the connecting sleeve 53 at both ends of the connecting shaft 4, and adjust the distance between the buckle sleeve 51 and the connecting sleeve 53 through the distance adjustment structure 54 between the buckle sleeve 51 and the connecting sleeve 53 to provide a suitable back support effect.

[0035] Implementation effect: First, because the heights of the backrests of different types of office chairs are different, when proposing a method for fixing the positioning cloth cover 22 at the two corners at the top of the backrest of the office chair, it is necessary to make the height of the cushion 2 adjustable to avoid the cushion 2 being too short, causing the seat cushion 1 to separate from the seat surface of the office chair, or the cushion 2 being too long. In order to further solve the problem of the height adjustment function of the back cushion 2, an extension portion 11 extending upward and having an elongated hole 111 is provided on the rear side of the seat cushion 1, and a connecting portion 21 is provided at the lower end of the back cushion 2. The connecting portion 21 is wound through the elongated hole 111 for multiple times under the deformation of the back cushion 2 to adjust the height of the back cushion 2 so as to match the height of the backrest of the corresponding model of the office chair. The seat cushion 1 is fixed to the office chair with the binding belt 12, and finally the purpose of preventing the thermal insulation seat cushion 1 from becoming loose and slipping during use is achieved; at the same time, the connecting portion 21 is wound through the elongated hole 111 for multiple times under the deformation of the back cushion 2 to form a supporting protruding area for supporting the back, which can also provide good support for the user's waist and improve the user experience; in addition, since the remaining part of the back cushion 2 may be too long or too short during the winding process, at this time, the elasticity during the winding and the deformation of the extension portion 11 extending upward are combined, so that when the positioning cloth cover 22 is installed at the two corners at the top of the backrest of the office chair, the seat cushion 1 can be laid flat on the seat surface of the office chair.

[0036] The connection between the extension portion 11 and the connection portion 21 is close to the winding center of the support protrusion area formed by the connection portion 21. At this time, by setting the connecting shaft 4, it is possible to provide rigid and flexible support for the user's waist to improve the support; and at both ends of the connecting shaft 4, there are provided adjustment mechanisms 5 for fixing on the backrest of the office chair and adjusting the distance with the backrest, so that the position of the support protrusion area can be adjusted to achieve better support for the user's waist; at the same time, through the setting of the adjustment mechanism 5, the connecting shaft 4 can be connected to the office chair, further preventing the thermal insulation cushion 1 from slipping after installation.

[0037] The connection between the snap-fit ​​sleeve 51 and the connecting sleeve 53 is achieved by setting the first wedge block 541 and the second wedge block 542. Since the height positions of the connecting shaft 4 and the connecting cloth sleeve 3 are relatively fixed, the installation height of the snap-fit ​​sleeve 51 on the edges of both sides of the backrest of the office chair is adjusted. At this time, the front and rear position of the connecting shaft 4 can be adjusted (that is, the distance between the snap-fit ​​sleeve 51 and the connecting sleeve 53 can be adjusted) by cooperating with the first inclined surface of the first wedge block 541 and the second inclined surface of the second wedge block 542.

[0038] The locking member 52 includes a locking bolt 521 threadedly connected to the front side of the buckle sleeve 51, and a pressing piece 522 rotatably arranged at the end of the locking bolt 521 and located in the buckle sleeve 51. The locking bolt 521 drives the pressing piece 522 to move and presses on the edge of the backrest of the office chair. At the same time, the locking bolt 521 is arranged at the front side of the buckle sleeve 51. Compared with being arranged at the rear side of the buckle sleeve 51, it can avoid that the back side of the backrest of the office chair has a protruding and exposed locking bolt 521. The existence of the adjustment mechanism 5 at the front side of the buckle sleeve 51 provides a space for the locking bolt 521. When the connecting part 21 is wound multiple times, the deformation of the cushion 2 each time it passes through the long strip hole 111 is large, which makes it inconvenient to wind. By additionally setting a zipper 13 that can open the long strip hole 111, after the zipper 13 is opened, it is convenient to complete multiple winding operations on the connecting part 21. The connecting portion 21 is used for winding to form a supporting protruding area for supporting the back. At this time, a plurality of partitioning stitching lines 211 are arranged along the height direction of the connecting portion 21 on the connecting portion 21. At this time, the connecting portion 21 is partitioned along its height direction (length direction), making it more convenient to wind the connecting portion 21.

[0039] Embodiment 2: A heat-insulating cushion, such as Figures 3 to 6As shown, the difference from Example 1 lies in the difference in the spacing adjustment structure 54. In this embodiment, a plug-in sleeve 511 in the form of a regular polygon is provided on the snap-fit ​​sleeve 51, and the spacing adjustment structure 54 includes a first threaded shaft 543 with one end fixed on the connecting sleeve 53, a second threaded shaft 544 with one end plugged into the plug-in sleeve 511 and with a thread direction opposite to that of the first threaded shaft 543, and a bidirectional threaded sleeve 545 with two ends respectively threadedly connected to the first threaded shaft 543 and the second threaded shaft 544.

[0040] Implementation effect: When adjusting the spacing between the snap-fit ​​sleeve 51 and the connecting sleeve 53, by rotating the bidirectional threaded sleeve 545, the first threaded shaft 543 and the second threaded shaft 544 can be moved closer to or farther away from each other, thereby adjusting the overall length of the spacing adjustment structure 54, thereby adjusting the spacing between the snap-fit ​​sleeve 51 and the connecting sleeve 53; in addition, the design of the second threaded shaft 544 and the plug-in sleeve 511 of the snap-fit ​​sleeve 51 are plugged in, which is convenient for assembly and disassembly.

[0041] Embodiment 3: A heat-insulating cushion, such as Figure 3 , Figure 4 and Figure 7 As shown, the difference from the first embodiment lies in the difference in the spacing adjustment structure 54. The spacing adjustment structure 54 of this embodiment includes a first telescopic tube 546 arranged on the buckle sleeve 51, a first telescopic rod 547 with one end arranged on the connecting sleeve 53 and the other end telescopically arranged in the first telescopic tube 546, and a stopper 548 arranged between the first telescopic tube 546 and the first telescopic rod 547. The top of the first telescopic tube 546 is provided with a mounting hole 5461, the bottom of the first telescopic tube 546 is provided with a telescopic hole 5462 corresponding to the mounting hole 5461, and the first telescopic rod 547 is provided with a waist-shaped hole 5471. The limiting member 548 includes a limiting tooth block 5481 embedded in the mounting hole 5461, a limiting shaft 5482 arranged on the lower surface of the limiting tooth block 5481 and passing through the waist-shaped hole 5471 and the telescopic hole 5462, a locking nut 5483 threadedly connected to the lower end of the limiting shaft 5482, and a rack 5484 arranged on the first telescopic rod 547 and located on both sides of the waist-shaped hole 5471. The limiting tooth block 5481 is meshed with the rack 5484.

[0042] Implementation effect: When adjusting the spacing between the snap-fit ​​sleeve 51 and the connecting sleeve 53, first loosen the locking nut 5483 so that the limiting tooth block 5481 and the limiting shaft 5482 can move upward, thereby separating the limiting tooth block 5481 and the rack 5484. At this time, the length of the first telescopic rod 547 in the first telescopic tube 546 can be adjusted. After adjustment, tighten the locking nut 5483 to make the limiting tooth block 5481 and the rack 5484 re-engage, thereby achieving the limiting fixation of the first telescopic rod 547.

[0043] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A heat-insulating cushion, comprising a cushion (1) and a back cushion (2) connected to the cushion (1), characterized in that: The rear side of the seat cushion (1) is provided with an extension part (11) that extends upward and has a long strip-shaped hole (111). The lower end of the back cushion (2) is provided with a connecting part (21) that is connected to the extension part (11) and has a width smaller than the length of the strip-shaped mounting hole (5461). The connecting part (21) is wound through the long strip-shaped hole (111) multiple times under the deformation of the back cushion (2) to form a support protruding area for supporting the back. On both sides of the top of the back cushion (2), there are positioning cloth sleeves (22) for respectively sleeving on two corners at the top of the backrest of the office chair. On both sides of the seat cushion (1), there are binding straps (12) for binding on the office chair.

2. A thermal insulation cushion according to claim 1, characterized in that: At the connection between the extension part (11) and the connecting part (21), there is a long strip-shaped connecting cloth sleeve (3). A connecting shaft (4) is penetrated through the connecting cloth sleeve (3). At both ends of the connecting shaft (4), there is an adjusting mechanism (5) for fixing on the backrest of the office chair and realizing the adjustment of the distance from the backrest; the adjusting mechanism (5) includes two symmetrically arranged "U"-shaped fastening sleeves (51) for fixing on the two side edges of the backrest of the office chair, a locking part (52) arranged on the fastening sleeve (51) and used for pressing against the backrest of the office chair, two connecting sleeves (53) installed at both ends of the connecting shaft (4), and a distance adjusting structure (54) arranged between the fastening sleeve (51) and the connecting sleeve (53) and realizing the adjustment of the distance between the two.

3. A thermal insulation cushion according to claim 2, characterized in that: The distance adjusting structure (54) includes a first wedge-shaped block (541) arranged on the fastening sleeve (51) and having a first inclined surface, and a second wedge-shaped block (542) arranged on the connecting sleeve (53) and having a second inclined surface. A sliding groove (5412) is arranged on the first inclined surface, and a sliding block (5422) that is slidably connected in the sliding groove (5412) is arranged on the second inclined surface. The lower end of the first wedge-shaped block (541) extends obliquely downward towards the direction close to the connecting sleeve (53).

4. The thermal insulation cushion according to claim 2, characterized in that: The fastening sleeve (51) is provided with a regular polygon-shaped plug-in sleeve (511). The distance adjusting structure (54) includes a first threaded shaft (543) with one end fixed on the connecting sleeve (53), a second threaded shaft (544) with one end inserted into the plug-in sleeve (511) and having a thread direction opposite to that of the first threaded shaft (543), and a bidirectional threaded sleeve (545) with both ends respectively threadedly connected to the first threaded shaft (543) and the second threaded shaft (544).

5. The thermal insulation cushion according to claim 2, characterized in that: The spacing adjustment structure (54) comprises a first telescopic tube (546) arranged on the buckle sleeve (51), a first telescopic rod (547) having one end arranged on the connection sleeve (53) and the other end telescopically arranged in the first telescopic tube (546), and a stopper (548) arranged between the first telescopic tube (546) and the first telescopic rod (547); a mounting hole (5461) is arranged on the top of the first telescopic tube (546), a telescopic hole (5462) corresponding to the mounting hole (5461) is arranged on the bottom of the first telescopic tube (546), and the first telescopic rod (547) is provided with a plurality of holes (5461) and a plurality of holes (5462) corresponding to the mounting hole (5461) are provided on the bottom of the first telescopic tube (546). ) is provided with a waist-shaped hole (5471), the limiting member (548) comprises a limiting tooth block (5481) embedded in the mounting hole (5461), a limiting shaft (5482) provided on the lower surface of the limiting tooth block (5481) and passing through the waist-shaped hole (5471) and the telescopic hole (5462), a locking nut (5483) threadedly connected to the lower end of the limiting shaft (5482), and a rack (5484) provided on the first telescopic rod (547) and located on both sides of the waist-shaped hole (5471), and the limiting tooth block (5481) is meshed with the rack (5484).

6. A thermal insulation cushion according to any one of claims 3 to 5, characterized in that: The connecting sleeve (53) is threadedly connected to the end of the connecting shaft (4); a reinforcing structure (55) located at the rear side of the backrest of the office chair is arranged between the rear sides of the two buckling sleeves (51); the two buckling sleeves (51) are symmetrically provided with mounting grooves (512); the two buckling sleeves (51) are symmetrically provided with notches (513) communicating with the mounting grooves (512); the reinforcing structure (55) comprises two embedded card blocks (551) embedded and tightly arranged in the two mounting grooves (512); A second telescopic tube (552) embedded in one of the clamping blocks (551) and passing through the notch (513), a second telescopic rod (553) disposed on the other of the clamping blocks (551) and passing through the notch (513), and a fixing bolt (554); one end of the second telescopic tube (552) is telescopically disposed on the second telescopic tube (552); and the fixing bolt (554) is disposed at one end of the second telescopic tube (552) close to the second telescopic rod (553) and is used to press against the circumference of the second telescopic rod (553).

7. The thermal insulation cushion according to claim 6, characterized in that: The locking member (52) comprises a locking bolt (521) threadedly connected to the front side of the snap-fit ​​sleeve (51), a pressing piece (522) rotatably arranged at the end of the locking bolt (521) and located in the snap-fit ​​sleeve (51), and a rubber buffer sheet (523) arranged on the pressing piece (522) and used for pressing against the backrest of the office chair, wherein the locking bolt (521) drives the pressing piece (522) to move so as to press against the edge of the backrest of the office chair.

8. The thermal insulation cushion according to claim 7, characterized in that: The extension portion (11) is provided with a zipper (13) extending to the side and the elongated hole (111) to open the elongated hole (111).

9. The thermal insulation cushion according to claim 8, characterized in that: The thickness of the connecting portion (21) is smaller than the thickness of the cushion (2), and the connecting portion (21) is provided with a plurality of partitioning stitching lines (211) arranged along the height direction of the connecting portion (21).

10. The thermal insulation cushion according to claim 9, characterized in that: The installation steps of the thermal insulation cushion on the office chair are as follows: (S1) firstly measure the height of the backrest of the office chair, open the zipper (13), pass the connecting shaft (4) through the connecting sleeve (53), wind the connecting portion (21) along the connecting shaft (4), close the zipper (13), and when the overall length of the extension portion (11) and the cushion (2) is close to the height of the backrest of the office chair, respectively put the two positioning cloth sleeves (22) on the top of the cushion (2) on the two folded corners of the top of the backrest of the office chair; (S2) adjusting the tightness of the connection portion (21) when it is rolled up and the deformation of the upwardly extending extension portion (11) so that the seat cushion (1) is laid flat on the seat surface of the office chair and is tied up with a binding belt (12); (S3) Snap-fit ​​sleeves (51) are installed on both side edges of the backrest of the office chair and fixed by means of locking members (52), reinforced by means of a reinforcing structure (55), connecting sleeves (53) are installed on both ends of the connecting shaft (4), and the spacing between the snap-fit ​​sleeves (51) and the connecting sleeves (53) is adjusted by means of a spacing adjustment structure (54) between the snap-fit ​​sleeves (51) and the connecting sleeves (53) to provide a suitable back support effect.

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