Buffer mechanism of seat cushion and seat

Abstract

The utility model discloses a buffering mechanism of a seat cushion and a seat. The buffering mechanism of the seat cushion comprises a cushion supporting frame, a base, a first connecting rod, a second connecting rod and an elastic air rod. The first connecting rod and the second connecting rod are both located between the cushion supporting frame and the base and are parallel to each other; the bottoms of the first connecting rod and the second connecting rod are hinged to the base, and the tops are hinged to the cushion supporting frame; the elastic air rod is arranged between the cushion supporting frame and the base and gradually inclines backwards from top to bottom, the upper end of the elastic air rod is hinged to the cushion supporting frame, the lower end of the elastic air rod is hinged to the base, and when the elastic air rod extends to the longest state, the first connecting rod and the second connecting rod are in the state of gradually inclining backwards from bottom to top. The seat cushion of the seat can move backwards while moving downwards in a self-adaptive manner, so that a user is prevented from perceiving relatively stiff impact from the seat cushion, and the sitting comfort is improved.

Description

Technical Field

[0001] This utility model relates to the field of seat technology, specifically to a cushioning mechanism for a seat cushion and a seat. Background Technology

[0002] Traditional chairs have a fixed structure where the seat cushion, legs, or base are fixed together. This structure cannot provide cushioning or dynamic support when the user sits down or changes posture, resulting in poor chair comfort. When bearing the weight of the human body, the chair cannot provide cushioning, and the user feels a relatively harsh impact when sitting down. It cannot adapt to the user's body shape and posture, which can easily lead to user fatigue with long-term use and make it difficult to provide a comfortable sitting experience. Utility Model Content

[0003] The purpose of this utility model is to provide a cushioning mechanism for a seat cushion and a seat, which can adapt to the user's body shape and improve comfort when the user sits down or changes sitting posture.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The cushioning mechanism of the seat cushion includes a seat cushion support frame, a base, a first link, a second link, and an elastic gas spring. The seat cushion is mounted on the seat cushion support frame.

[0006] The first link and the second link are both located between the seat support frame and the base, and they are parallel to each other, with the second link located behind the first link; the bottom of the first link and the second link are both hinged to the base, and the top of the first link and the second link are both hinged to the seat support frame.

[0007] The elastic gas spring is positioned between the seat support frame and the base and is gradually tilted backward from top to bottom. The upper end of the elastic gas spring is hinged to the seat support frame and the lower end is hinged to the base. When the elastic gas spring is extended to its longest state, both the first link and the second link are in a state of gradually tilting backward from bottom to top.

[0008] Preferably, an upper bracket is installed on each of the bottom two sides of the seat support frame, and both upper brackets extend in the front-to-back direction. A lower bracket is installed on each of the two sides of the base, and both lower brackets extend in the front-to-back direction. The two lower brackets correspond one-to-one with the two upper brackets and are located below the two upper brackets respectively. A first connecting rod and a second connecting rod are provided between the corresponding upper and lower brackets. The bottom of the first connecting rod is hinged to the front end of the lower bracket and the top is hinged to the front end of the upper bracket. The bottom of the second connecting rod is hinged to the rear end of the lower bracket and the top is hinged to the rear end of the upper bracket.

[0009] Preferably, one of the base, seat support frame, upper bracket, and lower bracket is provided with a limiting component for limiting the forward and backward swing angle of the first link and the second link. The limiting component includes a first limiting block placed on the rear side of the first link and a second limiting block placed on the front side of the second link.

[0010] Preferably, the lower support includes a bottom wall and two side walls. The two side walls are located on both sides of the bottom wall and together with the bottom wall form an upward-facing groove. The bottoms of the first connecting rod and the second connecting rod are both placed in the groove and are hinged to the lower support through pivots that pass through the two side walls. The first limiting block extends upward from the upper surface of the bottom wall, and the top surface of the first limiting block forms a first limiting surface, which gradually slopes upward from front to back.

[0011] Preferably, the lower support is provided with a support platform extending upward from the upper surface of the bottom wall, and the second limiting block extends from the rear side of the support platform toward the second connecting rod. The rear end face of the second limiting block forms a second limiting surface, which gradually tilts upward from front to back.

[0012] Preferably, one of the upper supports is provided with an inwardly extending upper connecting arm, and the lower support corresponding to the one of the upper supports is provided with an inwardly extending lower connecting arm, wherein the upper end of the elastic gas rod is hinged to the upper connecting arm and the lower end is hinged to the lower connecting arm.

[0013] Preferably, a first mounting arm is provided on each of the two front sides of the base, and a second mounting arm is provided on each of the two rear sides of the base. The two lower brackets are located on the upper sides of the base respectively. On the same side of the base, the front and rear parts of the lower brackets are respectively mounted on the first mounting arm and the second mounting arm.

[0014] Preferably, the base includes a front base and a rear base, the rear base being hinged to the front base so that the rear base can swing up and down relative to the front base; a first mounting arm is connected to the front base and is provided with a first shaft head extending outward; a second mounting arm is connected to the rear base and is provided with a second shaft head extending outward; the lower bracket is provided with a sliding groove extending forward and backward and a shaft hole, the first shaft head passing through the sliding groove so that the first shaft head can slide along the extension direction of the sliding groove and rotate relative to the lower bracket, and the second shaft head passing through the shaft hole to hinge the second mounting arm to the lower bracket.

[0015] Preferably, the upper bracket is detachably fixed to the seat cushion support frame.

[0016] Seats, including the cushioning mechanism of the aforementioned seat cushion.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] In this invention, a parallel four-bar linkage is formed by the first link, the second link, the seat cushion support frame, and the base. An elastic gas spring provides elastic support between the seat cushion support frame and the base. When the seat cushion support frame senses the user's weight, it can adaptively move backward while moving downward, providing cushioning when the user contacts the seat cushion and avoiding a harsh impact. Simultaneously, as the seat cushion moves backward with the seat cushion support frame, the user's back moves towards the seat back, providing support to the user's back and allowing the user to feel a certain push-back sensation, thus significantly improving seating comfort. Attached Figure Description

[0019] Figure 1 This is an assembly diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the usage state of this utility model;

[0022] Figure 4 for Figure 1 A schematic diagram showing the connection between the two connecting rods and the upper and lower supports;

[0023] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 6 for Figure 2 A magnified view of point B in the middle.

[0025] The components are as follows: 10, seat support frame; 20, base; 21, front base; 22, rear base; 23, first mounting arm; 231, first shaft head; 24, second mounting arm; 241, second shaft head; 30, elastic gas spring; 40, upper bracket; 41, upper connecting arm; 50, lower bracket; 501, bottom wall; 502, side wall; 51, slide groove; 52, shaft hole; 53, lower connecting arm; 54, support platform; 61, first connecting rod; 62, second connecting rod; 71, first limiting block; 711, first limiting surface; 72, second limiting block; 721, second limiting surface. Detailed Implementation

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0027] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] like Figure 1 , 2As shown in Figures 3, 4, 5, and 6, this utility model discloses a cushioning mechanism for a seat cushion. It includes a seat cushion support frame 10, a base 20, a first connecting rod 61, a second connecting rod 62, and an elastic gas spring 30. The base 20 serves as the bottom support component of the entire seat. The seat cushion support frame 10 is located above the base 20, and the seat cushion is mounted on the seat cushion support frame 10. The seat cushion support frame 10 and the base 20 are vertically spaced a certain distance apart. The first connecting rod 61 and the second connecting rod 62 are both located between the seat cushion support frame 10 and the base 20, and are parallel to each other. The second connecting rod 62 is located behind the first connecting rod 61, so that the second connecting rod 62 and the first connecting rod 61 are offset by a certain distance. The first connecting rod 61... The top of the first link 61 is hinged to the front of the seat support frame 10, and the bottom of the second link 62 is hinged to the front of the base 20. The top of the second link 62 is hinged to the rear of the seat support frame 10, and the bottom of the second link 62 is hinged to the rear of the base 20. Thus, the seat support frame 10, the first link 61, the base 20, and the second link 62 form a parallel four-bar linkage. The elastic gas spring 30 is placed between the seat support frame 10 and the base 20, and it is gradually tilted backward from top to bottom. The upper end of the elastic gas spring 30 is hinged to the seat support frame 10, and the lower end is hinged to the base 20. When the elastic gas spring 30 is extended to its longest state, it pulls the seat support frame 10 and the base 20, so that both the first link 61 and the second link 62 are in a state of gradually tilting backward from bottom to top.

[0030] See Figure 2 As shown, when the seat is not in use, the seat cushion support frame 10 is not subjected to pressure from the user, and the elastic gas spring 30 is in its longest extended state. Restricted by the elastic gas spring 30, both the first link 61 and the second link 62 are gradually tilted backward from bottom to top. At this time, the angle between the first link 61, the second link 62, and the base 20 is a relatively large acute angle. When the seat is in use, the user's weight is applied to the seat cushion, generating downward pressure on the seat cushion support frame 10. The elastic gas spring 30 contracts, and simultaneously the first link 61 and the second link 62 swing, as... Figure 2As shown, the increasing thrust of the elastic gas spring 30 as it contracts balances the downward pressure from the user on the seat support frame 10, keeping the seat support frame 10 stationary relative to the base 20. The angle between the first link 61, the second link 62 and the base 20 is a relatively small acute angle. Thus, as the user sits on the seat, the seat support frame 10 moves backward as the tops of the first link 61 and the second link 62 move downward relative to the base 20. In this invention, a parallel four-bar linkage is formed by the first link 61, the second link 62, the seat cushion support frame 10, and the base 20. An elastic support is formed between the seat cushion support frame 10 and the base 20 through the elastic gas spring 30. When the seat cushion support frame 10 senses the user's own weight, it can adaptively move backward while moving downward, providing cushioning when the user contacts the seat cushion and avoiding the user feeling a relatively hard impact from the seat cushion. At the same time, as the seat cushion moves backward with the seat cushion support frame 10, the user's back moves towards the seat back, using the backrest to support the user's back so that the user can feel a certain push-back feeling, thereby significantly improving the comfort of sitting.

[0031] In a preferred embodiment, an upper bracket 40 is installed on each of the bottom sides of the seat support frame 10. Both upper brackets 40 are strip-shaped and extend in the front-to-back direction. A lower bracket 50 is installed on each of the two sides of the base 20. Both lower brackets 50 are strip-shaped and extend in the front-to-back direction. The two lower brackets 50 are arranged in a one-to-one correspondence with the two upper brackets 40. The lower bracket 50 is located directly below its corresponding upper bracket 40. A first link 61 and a second link 62 are provided between the corresponding upper brackets 40 and lower brackets 50. That is, on both sides where the seat support frame 10 and the base 20 cooperate, a parallel four-bar linkage is formed by the first link 61, the second link 62, the upper bracket 40 and the lower bracket 50 to ensure the stability of the movement of the seat support frame 10. The bottom of the first link 61 is hinged to the front end of the lower bracket 50 and the top is hinged to the front end of the upper bracket 40. The bottom of the second link 62 is hinged to the rear end of the lower bracket 50 and the top is hinged to the rear end of the upper bracket 40. During assembly, the upper support 40, lower support 50, first connecting rod 61, and second connecting rod 62 can be assembled into a single component, which is then installed between the seat cushion support frame 10 and the base 20. Alternatively, a single elastic gas spring 30 can be installed on one of the components, or one elastic gas spring 30 can be configured on each component. To prevent damage to the elastic gas spring 30 due to excessive force, a limiting component is provided on one of the base 20, seat cushion support frame 10, upper support 40, or lower support 50. This limiting component limits the angle range of the forward and backward swing of the first connecting rod 61 and the second connecting rod 62. The limiting component includes a first limiting block 71 and a second limiting block 72. The first limiting block 71 is located behind the first connecting rod 61, and the second limiting block 72 is located in front of the second connecting rod 62. Alternatively, the first limiting block 71 and the second limiting block 72 can be installed on the lower support 50. Specifically, the lower support... The frame 50 includes a bottom wall 501 and two side walls 502. The two side walls 502 extend upward from both sides of the bottom wall 501, thus forming an upward-opening groove together with the bottom wall 501. Therefore, the lower support 50 has a U-shaped cross-section. The bottoms of the first connecting rod 61 and the second connecting rod 62 are placed within the groove and are hinged to the lower support 50 via pivots passing through the two side walls 502. When the first connecting rod 61 and the second connecting rod 62 swing back and forth, the groove on the lower support 50 provides clearance for the first connecting rod 61 and the second connecting rod 62 to avoid interference with the lower support 50. The first limiting block 71 extends upward from the upper surface of the bottom wall 501. The top surface of the first limiting block 71 forms a first limiting surface 711, which is an inclined structure that gradually slopes upward from front to back. When the first connecting rod 61 swings to... Figure 3In the indicated state, the rear side of the first connecting rod 61 is in contact with and abuts against the first limiting surface 711. The first limiting surface 711 supports the first connecting rod 61. Because the first limiting surface 711 is designed with an inclined structure, its inclination angle can be adapted to the angle of the first connecting rod 61, so that there is a relatively large force-bearing area between the first connecting rod 61 and the first limiting block 71, avoiding stress concentration. Figure 3 In the shown state, the first limiting block 71 supports the first connecting rod 61. The downward pressure on the seat cushion support frame 10 is transmitted to the base 20 through the first connecting rod 61, the first limiting block 71, and the lower bracket 50, thereby preventing the elastic gas spring 30 from still being under force when it is retracted to its shortest state. This not only limits the downward and backward movement of the seat cushion but also protects the elastic gas spring 30. A support platform 54 extending upward from the bottom wall 501 is provided on the lower bracket 50. The second limiting block 72 extends from the rear side of the support platform 54 toward the second connecting rod 62. The rear end face of the second limiting block 72 forms a second limiting surface 721, which gradually slopes upward from front to back. Figure 2 In the illustrated state, the second limiting surface 721 abuts against the front side of the second connecting rod 62. The second limiting surface 721 is configured with an inclined structure, and the second connecting rod 62 has a relatively large contact area with the second limiting surface 721. The first limiting block 71 and the second limiting block 72, as described above, together define the swing angle range of the first connecting rod 61 and the second connecting rod 62. In other embodiments, the first limiting block 71 and the second limiting block 72 may also be disposed on the upper bracket 40, the base 20, or the seat cushion support frame 10, or the first limiting block 71 and the second limiting block 72 may be disposed on both sides of the first connecting rod 61, or the first limiting block 71 and the second limiting block 72 may be disposed on both sides of the second connecting rod 62.

[0032] An inwardly extending upper connecting arm 41 is provided on one of the upper supports 40, and an inwardly extending lower connecting arm 53 is provided on the corresponding lower support 50. The upper end of the elastic gas spring 30 is hinged to the upper connecting arm 41, and the lower end is hinged to the lower connecting arm 53. In other embodiments, the two ends of the elastic gas spring 30 may be hinged to the seat support frame 10 and the base 20 respectively.

[0033] A first mounting arm 23 is provided on each of the two front sides of the base 20, and a second mounting arm 24 is provided on each of the two rear sides of the base 20. That is, on one side of the base 20, a first mounting arm 23 is provided on the front side and a second mounting arm 24 is provided on the rear side. Two lower brackets 50 are located on the upper sides of the base 20 respectively. On the same side of the base 20, the front and rear parts of the lower brackets 50 are respectively mounted on the first mounting arm 23 and the second mounting arm 24. In a preferred embodiment, the base 20 includes a front base 21 and a rear base 22, the rear base 22 being hinged to the front base 21, allowing the rear base 22 to swing up and down relative to the front base 21. A first mounting arm 23 is connected to the front base 21, and a first shaft head 231 extending outward is provided on the first mounting arm 23. A second mounting arm 24 is connected to the rear base 22, and a second shaft head 241 extending outward is provided on the second mounting arm 24. A sliding groove 51 extending forward and backward is provided on the lower bracket 50, the sliding groove 51 passing through the inner side to the outer side of the lower bracket 50. A shaft hole 52 is also provided on the lower bracket 50, passing through the inner side to the outer side of the lower bracket 50. The first shaft head 231 is... The first shaft head 231 slides along the extension direction of the slide groove 51, allowing it to slide relative to the lower support 50 in the front-rear direction. At the same time, the first shaft head 231 can rotate within the slide groove 51, meaning the first shaft head 231 can rotate relative to the lower support 50. The second shaft head 241 passes through the shaft hole 52 to hinge the second mounting arm 24 to the lower support 50. During seat use, since the lower support 50 is hinged to the rear base 22 and slides with the front base 21, when the rear base 22 swings downward relative to the front base 21, it can drive the lower support 50 to move backward and swing downward, thereby realizing different shape changes of the seat cushion to adapt to different body shapes and sitting posture requirements of users.

[0034] The upper bracket 40 is detachably fixed to the seat support frame 10 to facilitate the assembly of the components formed by the lower bracket 50, the upper bracket 40, the first connecting rod 61, the second connecting rod 62 and the elastic gas spring 30 with the seat support frame 10. Specifically, the upper bracket 40 and the seat support frame 10 can be fixed together with bolts.

[0035] The seat of this utility model includes the cushioning mechanism of the seat cushion mentioned above. The other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0036] Finally, it should be noted that the above embodiments are only optional embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A cushioning mechanism for a seat cushion, characterized by, The seat cushion is installed on the seat cushion support frame; The first connecting rod and the second connecting rod are both located between the seat cushion support frame and the base, and are parallel to each other, with the second connecting rod located at the rear side of the first connecting rod; the bottom of the first connecting rod and the bottom of the second connecting rod are both hinged to the base, and the top of the first connecting rod and the top of the second connecting rod are both hinged to the seat cushion support frame; The elastic air rod is disposed between the seat cushion support frame and the base and gradually inclines rearward from top to bottom, with the upper end of the elastic air rod being hinged to the seat cushion support frame and the lower end of the elastic air rod being hinged to the base; when the elastic air rod is stretched to the longest state, the first connecting rod and the second connecting rod are both in a state of gradually inclining rearward from bottom to top; The bottom of the seat cushion support frame is provided with two upper supports, and the two upper supports both extend in the front-rear direction; the base is provided with two lower supports, and the two lower supports both extend in the front-rear direction; the two lower supports correspond to the two upper supports and are located below the two upper supports, respectively; the first connecting rod and the second connecting rod are both disposed between the upper support and the lower support corresponding to the upper support; the bottom of the first connecting rod is hinged to the front end of the lower support, and the top of the first connecting rod is hinged to the front end of the upper support; the bottom of the second connecting rod is hinged to the rear end of the lower support, and the top of the second connecting rod is hinged to the rear end of the upper support. One of the base, the seat cushion support frame, the upper support and the lower support is provided with a limiting component for limiting the front-rear swinging angle of the first connecting rod and the second connecting rod; the limiting component comprises a first limiting block disposed at the rear side of the first connecting rod and a second limiting block disposed at the front side of the second connecting rod.

2. The cushioning mechanism of claim 1, wherein The lower support comprises a bottom wall and two side walls, the two side walls are located at the two sides of the bottom wall and together with the bottom wall form a recess with an opening facing upward; the bottom of the first connecting rod and the bottom of the second connecting rod are both disposed in the recess and are hinged to the lower support through pivots transversely crossing the two side walls; the first limiting block extends upward from the upper surface of the bottom wall, and the top surface of the first limiting block forms a first limiting surface which gradually inclines upward from front to rear.

3. The cushioning mechanism of claim 2, wherein The lower support is provided with a support table extending upward from the upper surface of the bottom wall, and the second limiting block extends from the rear side of the support table toward the second connecting rod; the rear end surface of the second limiting block forms a second limiting surface which gradually inclines upward from front to rear.

4. The cushioning mechanism of claim 1, wherein One of the upper supports is provided with an upper connecting arm extending inward, and the lower support corresponding to the one of the upper supports is provided with a lower connecting arm extending inward; the upper end of the elastic air rod is hinged to the upper connecting arm, and the lower end of the elastic air rod is hinged to the lower connecting arm.

5. The cushioning mechanism of claim 1, wherein The front of the base is provided with a first mounting arm on each side, the rear of the base is provided with a second mounting arm on each side, and the two lower supports are located above the two sides of the base; on the same side of the base, the front of the lower support and the rear of the lower support are mounted to the first mounting arm and the second mounting arm, respectively.

6. The cushioning mechanism of claim 5, wherein The base comprises a front base and a rear base, the rear base is hinged with the front base to enable the rear base to swing up and down relative to the front base; a first mounting arm is connected on the front base, the first mounting arm is provided with a first shaft head extending outward, a second mounting arm is connected on the rear base, the second mounting arm is provided with a second shaft head extending outward; a slide groove extending front and back and a shaft hole are provided on the lower support, the first shaft head is penetrated into the slide groove to enable the first shaft head to slide along the extension direction of the slide groove and rotate relative to the lower support, the second shaft head is penetrated into the shaft hole to hinge the second mounting arm and the lower support together.

7. The cushioning mechanism of claim 1, wherein The upper support is detachably fixed on the cushion support frame.

8. A seat, characterized by The cushion mechanism comprises the seat cushion of any one of claims 1-7.

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