Self-adaptive pressure-adjustable chassis

Abstract

The utility model discloses a self-adaptive pressure adjustable chassis, which relates to the technical field of seats and comprises a cushion mounting tray, a backrest mounting tray, a rotating shaft III, a rotating shaft I, a connecting plate, a fixed block I, an elastic piece I, a fixed block II, a rotating shaft II, a pressure adjusting handle, a gear block and a fixing mechanism. Through the arrangement of the connecting plate, the first fixing block, the first elastic piece, the second fixing block and the gear block, the gear block can be rotated to enable the first elastic piece to elastically deform, the rotation angles of the gear block are different, the deformation degrees of the first elastic piece are different, and therefore the initial pressure applied to the backrest by users with different body types can be adjusted, and the user experience is improved. The backrest is prevented from being quickly toppled when a large-size user topples the backrest, and meanwhile, the backrest is prevented from being difficultly toppled by a small-size user.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to an adaptive pressure-adjustable chassis. Background Art

[0002] A chair is a piece of furniture with a backrest and sometimes armrests.

[0003] The backrests of existing seats on the market can be tilted to meet the needs of different user groups. However, due to the different body shapes of users, the forces applied to the backrests by users when they tilt the backrests are different. The existing technology is unable to adjust the initial anti-tilting force of the backrest according to the different body shapes of users and the different applied forces. Therefore, there is an urgent need for an adaptive pressure-adjustable chassis to solve the above problems. Utility Model Content

[0004] The purpose of the embodiments of the present utility model is to provide an adaptive pressure adjustable chassis to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An adaptive pressure adjustable chassis, comprising a seat cushion mounting tray and a backrest mounting tray, wherein the bottom of one end of the seat cushion mounting tray is rotatably connected to a third rotating shaft, and the third rotating shaft is rotatably connected to the bottom of the backrest mounting tray, and further comprising:

[0007] A rotating shaft 1 is rotatably connected to the other end of the seat cushion mounting tray;

[0008] A connecting plate connected to the rotating shaft;

[0009] A fixing block 1 connected to the connecting plate;

[0010] An elastic member 1, one end of which is connected to a fixing block 1;

[0011] A second fixing block connected to the other end of the first elastic member;

[0012] A second rotating shaft is rotatably connected to the second fixing block and is rotatably connected to the top of the backrest mounting tray, and the second rotating shaft and the third rotating shaft are located at the same end;

[0013] The pressure regulating handle is rotatably connected to the seat cushion mounting tray;

[0014] A shift block is connected to the pressure regulating handle, the shift block is located at the bottom of the connecting plate and abuts against it, and is used to adjust the inclination angle of the connecting plate;

[0015] The fixing mechanism has one end connected to the seat cushion mounting tray and the other end connected to the second rotating shaft, and is used to fix the rotation angle of the backrest mounting tray.

[0016] As a further solution of the utility model: the fixing mechanism includes:

[0017] A locking plate, rotatably connected to the second rotating shaft and the third rotating shaft;

[0018] A clamping hole is provided on the locking plate, and the clamping hole is provided in a plurality of groups;

[0019] Press the handle to slide and connect with the seat cushion mounting tray;

[0020] A sliding rod connected to the pressing handle;

[0021] A sliding sheet connected to the sliding rod;

[0022] A clamping rod connected to the sliding sheet, wherein the diameter of the clamping rod matches the diameter of the clamping hole;

[0023] The second elastic member is sleeved on the clamping rod, one end of which is connected to the sliding sheet, and the other end of which is in contact with the seat cushion mounting tray;

[0024] The limiting component has one end connected to the bottom of the seat cushion mounting tray and the other end connected to the sliding rod, and is used to limit the position of the sliding rod.

[0025] As a further solution of the utility model: the limit assembly includes:

[0026] A card slot is provided at the bottom of the sliding rod, and the card slot is provided in two groups;

[0027] A fixing cylinder connected to the bottom of the cushion mounting tray;

[0028] The telescopic rod is arranged inside the fixed tube, and the bottom end of the telescopic rod is connected to the bottom of the fixed tube;

[0029] A card ball connected to the top of the telescopic rod and card-engaged with a group of the card slots;

[0030] The elastic member three is sleeved on the telescopic rod, and the top end is connected with the card ball, and the bottom end is connected with the bottom of the fixed tube.

[0031] As a further solution of the utility model: the shift block is composed of a plurality of cams with the pressure regulating handle as the axis, and the shift block is an integrally formed structure.

[0032] As a further solution of the utility model: the rotation radius of the plurality of groups of cams gradually increases along the rotation direction.

[0033] Compared with the prior art, the beneficial effects of the utility model are:

[0034] The utility model provides a connecting plate, a fixing block 1, an elastic member 1, a fixing block 2 and a shift block, and the shift block can be rotated to make the elastic member 1 elastically deformed. The deformation degree of the elastic member 1 is different with the rotation angle of the shift block, so that the initial pressure applied to the backrest by users of different body sizes can be adjusted, so that the backrest can be prevented from tipping over quickly when a large user tips over the backrest, and at the same time, it can be prevented from being difficult for a small user to tip over the backrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of an adaptive pressure adjustable chassis in an embodiment of the utility model.

[0036] Figure 2 It is a schematic diagram of the internal structure of the seat cushion mounting tray in an embodiment of the utility model.

[0037] Figure 3 It is a structural schematic diagram of the fixing mechanism in the embodiment of the utility model.

[0038] Figure 4 It is a schematic diagram of the structure of the limit assembly in the embodiment of the utility model.

[0039] Figure 5 It is a structural schematic diagram of the gear block in the embodiment of the utility model.

[0040] Figure 6 It is a cross-sectional view of the limiting component in the embodiment of the utility model.

[0041] Figure 7 It is a structural schematic diagram of a fixing block 1 in an embodiment of the utility model.

[0042] In the figure: 1. seat cushion mounting tray; 2. rotating shaft 1; 3. connecting plate; 4. fixing block 1; 5. elastic member 1; 6. fixing block 2; 7. rotating shaft 2; 8. backrest mounting tray; 9. rotating shaft 3; 10. pressure regulating handle; 11. gear block; 12. locking plate; 13. clamping hole; 14. pressing handle; 15. sliding rod; 16. sliding plate; 17. clamping rod; 18. elastic member 2; 19. clamping slot; 20. fixing cylinder; 21. telescopic rod; 22. clamping ball; 23. elastic member 3; 24. fixing sleeve. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] In the present utility model embodiment, please refer to Figures 1 to 7 , an adaptive pressure adjustable chassis, comprising a seat cushion mounting tray 1 and a backrest mounting tray 8, wherein the bottom of one end of the seat cushion mounting tray 1 is rotatably connected to a rotating shaft 3 9, and the rotating shaft 3 9 is rotatably connected to the bottom of the backrest mounting tray 8, and further comprising:

[0045] A rotating shaft 2 is rotatably connected to the other end of the seat cushion mounting tray 1;

[0046] A connecting plate 3 is connected to the rotating shaft 2, and the connecting plate 3 is in a U shape;

[0047] A fixing block 4 connected to the connecting plate 3;

[0048] An elastic member 5, one end of which is connected to a fixed block 4;

[0049] The fixing block 2 6 is connected to the other end of the elastic member 1 5;

[0050] The second rotating shaft 7 is rotatably connected to the second fixing block 6 and is rotatably connected to the top of the backrest mounting tray 8, and the second rotating shaft 7 and the third rotating shaft 9 are located at the same end;

[0051] The pressure regulating handle 10 is rotatably connected to the seat cushion mounting tray 1;

[0052] The shift block 11 is connected to the pressure regulating handle 10. The shift block 11 is located at the bottom of the connecting plate 3 and abuts against it. The shift block 11 is composed of a plurality of cams with the pressure regulating handle 10 as the axis. The rotation radius of the plurality of cams gradually increases along the rotation direction. The shift block is an integrally formed structure.

[0053] The fixing mechanism has one end connected to the seat cushion mounting tray 1 and the other end connected to the second rotating shaft 7, and is used to fix the rotation angle of the backrest mounting tray 8.

[0054] The bottom of the seat cushion mounting tray 1 is mounted on the top of the telescopic rod of the seat, the top of the seat cushion mounting tray 1 can be mounted with a seat cushion, and the backrest mounting tray 8 can be mounted with a seat backrest.

[0055] In the initial state, the fixing mechanism does not fix the backrest mounting tray 8. When the angle of the backrest needs to be adjusted, the user leans back against the backrest to change the inclination angle of the backrest, thereby causing the backrest mounting tray 8 to rotate around the rotation axis 3 9. At the same time, the backrest mounting tray 8 drives the fixing block 2 6 to move, causing the elastic member 1 5 to stretch and deform. The deformation force generated by the stretching of the elastic member 1 5 is opposite to the direction of the pressure applied by the user on the backrest, thereby preventing the backrest from suddenly tilting backwards under the pressure applied by the user. When the backrest tilts to a certain angle, the user applies an external force to the fixing mechanism to move the fixing mechanism to fix the backrest mounting tray 8, thereby fixing the backrest.

[0056] Due to the different body shapes of users, the pressure applied to the backrest is different. In order to meet the needs of people of different body shapes, the user can first rotate the pressure regulating handle 10, and the pressure regulating handle 10 drives the shift block 11 to rotate. Due to the different rotation radius of the shift block 11, the shift block 11 can drive the connecting plate 3 to rotate around the rotating shaft 2 when rotating, and the connecting plate 3 drives the fixed block 4 to move, so that the distance between the fixed block 4 and the fixed block 2 6 changes, so that the elastic member 15 is elastically deformed, so that the initial pressure applied by the user to the backrest changes, and because the shift block 11 is composed of a plurality of groups of cams with the pressure regulating handle 10 as the axis, and the rotation radius gradually increases along the rotation direction, the initial deformation force of the elastic member 15 can be adjusted to meet the needs of people of different body shapes, and the shift block 11 is an integrated structure with higher strength to avoid damage to the shift block 11 during use. The elastic member 15 can be a spring, a spring, etc.

[0057] In the embodiment of the utility model, the fixing block 4 is arranged inside the connecting plate 3, and the fixing block 4 is connected to the connecting plate 3 through an axle rod, and the two ends of the axle rod are respectively connected to the two sides of the connecting plate 3, and the axle rod passes through the fixing block 4 and is rotatably connected thereto.

[0058] In the present utility model embodiment, please refer to Figure 7 The fixed block 1 4 and the fixed block 2 6 have the same shape, and both the fixed block 1 4 and the fixed block 2 6 are provided with a spiral groove matching the elastic member 1 5. The two ends of the elastic member 1 5 are respectively connected to the spiral grooves provided on the fixed block 1 4 and the fixed block 2 6, so as to fix the elastic member 1 5 and improve the connection strength between the elastic member 1 5 and the fixed block 1 4 and the fixed block 2 6.

[0059] In the present utility model embodiment, please refer to Figure 6 A fixing sleeve 24 is provided at both ends of the shift block 11, and the fixing sleeve 24 is connected to the pressure regulating handle 10, and is used to fix the shift block 11 and limit the position of the shift block 11 to improve the connection strength between the shift block 11 and the pressure regulating handle 10.

[0060] As an embodiment of the present invention, please refer to Figures 1 to 4 , Figure 6 , the fixing mechanism comprises:

[0061] The locking piece 12 is rotatably connected to the second rotating shaft 7 and the third rotating shaft 9;

[0062] A locking hole 13 is provided on the locking piece 12, and the locking hole 13 is provided in a plurality of groups;

[0063] Press the handle 14 to slide into connection with the cushion mounting tray 1;

[0064] A sliding rod 15 connected to the pressing handle 14;

[0065] A sliding sheet 16 connected to the sliding rod 15;

[0066] A clamping rod 17 connected to the sliding sheet 16, wherein the diameter of the clamping rod 17 matches the diameter of the clamping hole 13;

[0067] The second elastic member 18 is sleeved on the clamping rod 17, and one end of the elastic member 18 is connected to the sliding sheet 16, and the other end of the elastic member 18 is in contact with the seat cushion mounting tray 1;

[0068] A limit assembly, one end of which is connected to the bottom of the cushion mounting tray 1 and the other end of which is connected to the sliding rod 15, is used to limit the position of the sliding rod 15. The limit assembly includes:

[0069] A card slot 19 is provided at the bottom of the sliding rod 15, and the card slot 19 is provided in two groups;

[0070] The fixing cylinder 20 is connected to the bottom of the cushion mounting tray 1;

[0071] The telescopic rod 21 is disposed inside the fixed tube 20, and the bottom end thereof is connected to the bottom of the fixed tube 20;

[0072] A card ball 22 is connected to the top of the telescopic rod 21 and is card-engaged with a group of the card slots 19;

[0073] The elastic member 3 23 is sleeved on the telescopic rod 21 , and the top end is connected to the card ball 22 , and the bottom end is connected to the bottom of the fixed tube 20 .

[0074] In the initial state, the locking ball 22 is engaged with the locking groove 19 near the side of the pressing handle 14 to fix the sliding rod 15. At this time, the locking rod 17 is not engaged with the locking hole 13, and the angle of the backrest mounting tray 8 can be adjusted, so that the angle of the backrest can be adjusted. The backrest mounting tray 8 drives the locking piece 12 to rotate around the rotating shaft 3 9. After the adjustment is completed, the pressing handle 14 is pressed, so that the pressing handle 14 drives the sliding rod 15 and the sliding piece 16 to move horizontally, and then drives the locking rod 17 to move horizontally, so that the locking rod 17 is engaged with the locking hole 13, thereby fixing the locking piece 12. At this time, the locking ball 22 is engaged with another group of the locking grooves 19 to fix the position of the sliding rod 15. The elastic member 2 18 and the elastic member 3 23 can be springs, springs, etc.

[0075] In this embodiment, the deformation force provided by the elastic member three 23 is greater than the deformation force provided by the elastic member two 18 .

[0076] The working principle of the utility model is as follows: in the initial state, the card ball 22 is engaged with the card slot 19 close to the side of the pressing handle 14 to fix the sliding rod 15. At this time, the card rod 17 is not engaged with the card hole 13, and the angle of the backrest mounting tray 8 can be adjusted, so that the angle of the backrest can be adjusted. The backrest mounting tray 8 drives the locking piece 12 to rotate around the rotating shaft 3 9. After the adjustment is completed, the pressing handle 14 is pressed, so that the pressing handle 14 drives the sliding rod 15 and the sliding piece 16 to move horizontally, and then drives the card rod 17 to move horizontally, so that the card rod 17 is engaged with the card hole 13, thereby fixing the locking piece 12. At this time, the card ball 22 is engaged with another set of card slots 19 to fix the position of the sliding rod 15;

[0077] Due to the different body shapes of users, the pressure applied to the backrest is different. In order to meet the usage needs of people of different body shapes, the user can first rotate the pressure regulating handle 10, and the pressure regulating handle 10 drives the shift block 11 to rotate. Due to the different rotation radius of the shift block 11, the shift block 11 can drive the connecting plate 3 to rotate around the rotating shaft 2 when it rotates, and the connecting plate 3 drives the fixed block 4 to move, so that the distance between the fixed block 4 and the fixed block 2 6 changes, thereby causing the elastic member 5 to undergo elastic deformation, thereby changing the initial pressure applied by the user to the backrest. Moreover, since the shift block 11 is composed of a plurality of groups of cams with the pressure regulating handle 10 as the axis, and the rotation radius gradually increases along the rotation direction, the initial deformation force of the elastic member 5 can be adjusted to meet the needs of people of different body shapes.

[0078] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0079] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An adaptive pressure adjustable chassis, comprising a seat cushion mounting tray and a backrest mounting tray, wherein the bottom of one end of the seat cushion mounting tray is rotatably connected to a third rotating shaft, and the third rotating shaft is rotatably connected to the bottom of the backrest mounting tray, characterized in that: Also includes: A rotating shaft 1 is rotatably connected to the other end of the seat cushion mounting tray; A connecting plate connected to the rotating shaft; A fixing block 1 connected to the connecting plate; An elastic member 1, one end of which is connected to a fixing block 1; A second fixing block connected to the other end of the first elastic member; A second rotating shaft is rotatably connected to the second fixing block and is rotatably connected to the top of the backrest mounting tray, and the second rotating shaft and the third rotating shaft are located at the same end; The pressure regulating handle is rotatably connected to the seat cushion mounting tray; A shift block connected to the pressure regulating handle, the shift block is located at the bottom of the connecting plate and abuts against it, and is used to adjust the inclination angle of the connecting plate; The fixing mechanism has one end connected to the seat cushion mounting tray and the other end connected to the second rotating shaft, and is used to fix the rotation angle of the backrest mounting tray.

2. The adaptive pressure adjustable chassis according to claim 1, characterized in that: The fixing mechanism comprises: A locking plate, rotatably connected to the second rotating shaft and the third rotating shaft; A clamping hole is provided on the locking plate, and the clamping hole is provided in a plurality of groups; Press the handle to slide and connect with the seat cushion mounting tray; A sliding rod connected to the pressing handle; A sliding sheet connected to the sliding rod; A clamping rod connected to the sliding sheet, wherein the diameter of the clamping rod matches the diameter of the clamping hole; The second elastic member is sleeved on the clamping rod, one end of which is connected to the sliding sheet, and the other end of which is in contact with the seat cushion mounting tray; The limiting component has one end connected to the bottom of the seat cushion mounting tray and the other end connected to the sliding rod, and is used to limit the position of the sliding rod.

3. The adaptive pressure adjustable chassis according to claim 2, characterized in that: The limiting component comprises: A card slot is provided at the bottom of the sliding rod, and the card slot is provided in two groups; A fixing cylinder connected to the bottom of the cushion mounting tray; The telescopic rod is arranged inside the fixed tube, and the bottom end of the telescopic rod is connected to the bottom of the fixed tube; A card ball connected to the top of the telescopic rod and card-engaged with a group of the card slots; The elastic member three is sleeved on the telescopic rod, and the top end is connected with the card ball, and the bottom end is connected with the bottom of the fixed tube.

4. The adaptive pressure adjustable chassis according to claim 1, characterized in that: The shift block is composed of a plurality of cams with the pressure regulating handle as the axis, and the shift block is an integrally formed structure.

5. The adaptive pressure adjustable chassis according to claim 4, characterized in that: The rotation radius of the plurality of groups of cams gradually increases along the rotation direction.

6. The adaptive pressure adjustable chassis according to claim 1, characterized in that: The connecting plate is in a U shape.

7. The adaptive pressure adjustable chassis according to claim 6, characterized in that: The fixing block 1 is arranged inside the connecting plate, and the fixing block 1 is connected to the connecting plate through a shaft rod, and the two ends of the shaft rod are respectively connected to the two sides of the connecting plate, and the shaft rod passes through the fixing block 1 and is rotatably connected thereto.

8. The adaptive pressure adjustable chassis according to claim 1, characterized in that: The fixed block 1 and the fixed block 2 have the same shape, and are both provided with a spiral groove matching the elastic member 1. Both ends of the elastic member 1 are respectively connected to the spiral grooves provided on the fixed block 1 and the fixed block 2, so as to improve the connection strength between the elastic member 1 and the fixed block 1 and the fixed block 2.

9. The adaptive pressure adjustable chassis according to claim 1, characterized in that: Both ends of the shift block are provided with fixing sleeves, which are connected to the pressure regulating handle and are used to fix the shift block and limit the position of the shift block to improve the connection strength between the shift block and the pressure regulating handle.

Images