Chassis and seat

Abstract

The chassis comprises a fixing plate, a tail plate, a transmission assembly and an elastic assembly, the tail plate is rotationally connected with one end of the fixing plate so as to rotate around the fixing plate, one end of the elastic assembly is rotationally connected to the fixing plate, and the other end of the elastic assembly is rotationally connected to the tail plate through the transmission assembly so as to achieve indirect transmission connection with the tail plate. The other end of the elastic assembly does not need to be directly connected to the tail plate, so that the size of the elastic assembly is reduced, the installation space needed by the elastic assembly is correspondingly reduced, the overall size of the chassis is reduced, and the cost of the elastic assembly is correspondingly reduced. The chair is applied to the field of chairs.

Description

Technical Field

[0001] The utility model relates to the field of chairs, in particular to a chassis and a seat. Background Art

[0002] An ergonomic chair is a chair designed based on the curves of the human body. An ergonomic chair can be adjusted in a variety of ways to meet the needs of the user. For example, the seat cushion of an ergonomic chair can be extended forward and backward, and the backrest of an ergonomic chair can be adjusted backward to a certain angle.

[0003] In the related art, the angle adjustment method of the ergonomic chair backrest has the following defects: 1. Torsion springs are mostly used for large-angle adjustment. The structure of the torsion spring is complex, which makes the design of the torsion spring difficult. The complex design and manufacturing process will also cause the cost of the torsion spring to further increase, and the service life of the torsion spring is limited; 2. When a straight spring is used for drive, the adjustment angle of the ergonomic chair backrest is limited, and large-angle adjustment cannot be achieved. In addition, the straight spring occupies a large space, which increases the size of the chassis and increases the manufacturing cost. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a chassis that can reduce costs and meet the requirements of large-angle adjustment.

[0005] A seat having the chassis is also provided.

[0006] The chassis according to the first embodiment of the utility model comprises:

[0007] The fixed plate comprises a first rotating shaft, a second rotating shaft and a third rotating shaft in sequence along a first direction;

[0008] a tailgate, rotatably connected to the first rotating shaft and capable of rotating around the first rotating shaft, the tailgate comprising a fourth rotating shaft, the fourth rotating shaft being capable of rotating around the first rotating shaft;

[0009] A transmission assembly, rotatably connected to the third rotating shaft, the transmission assembly comprising a fifth rotating shaft capable of rotating around the third rotating shaft, the fifth rotating shaft being transmission-connected to the fourth rotating shaft and capable of rotating around the third rotating shaft driven by the fourth rotating shaft;

[0010] Wherein, the axes of the first rotating shaft, the second rotating shaft, the third rotating shaft, the fourth rotating shaft and the fifth rotating shaft are all arranged along the second direction, and the second direction is perpendicular to the first direction;

[0011] An elastic component capable of elastically deforming in a linear direction, one end of the elastic component being rotatably connected to the second rotating shaft, and the other end of the elastic component being rotatably connected to the fifth rotating shaft;

[0012] Wherein, the tail plate is configured such that when an external force acts thereon, the tail plate and the fourth rotating shaft rotate about the first rotating shaft, the fourth rotating shaft drives the fifth rotating shaft to rotate about the third rotating shaft through the transmission assembly, and the elastic assembly stores elastic potential energy; when the external force is removed, the elastic assembly drives the tail plate to reset.

[0013] The chassis according to the first aspect embodiment of the present utility model has at least the following beneficial effects:

[0014] 1. One end of the elastic assembly is rotatably connected to the second rotating shaft, the second rotating shaft is located between the first rotating shaft and the third rotating shaft, and the other end of the elastic assembly is rotatably connected to the fifth rotating shaft and is indirectly connected to the tail plate through the transmission assembly, shortening the distance between the other end of the elastic assembly and the tail plate, making the size of the elastic assembly smaller and the occupied space smaller, and the overall size of the chassis can be optimized to reduce the cost of the chassis;

[0015] 2. The other end of the elastic assembly is indirectly connected to the tail plate through the transmission assembly, and the elastic assembly and the tail plate exist independently. The elastic assembly has less restriction on the rotation angle of the tail plate, the tail plate can have a larger rotation angle, the backrest can have a larger rotation angle, the backrest can be adjusted at a large angle, and it can better meet the usage needs of users.

[0016] According to some embodiments of the present utility model, the transmission assembly includes:

[0017] A rotating pressing plate, rotatably connected to the third rotating shaft and capable of rotating about the third rotating shaft, the rotating pressing plate includes the fifth rotating shaft, and the fifth rotating shaft is capable of rotating about the third rotating shaft;

[0018] A linkage plate, drivingly connected to the fourth rotating shaft and the fifth rotating shaft to drive the fifth rotating shaft to rotate about the third rotating shaft under the drive of the fourth rotating shaft.

[0019] According to some embodiments of the present utility model, the rotating pressing plate further includes a sixth rotating shaft, and the axis of the sixth rotating shaft is arranged along the second direction;

[0020] The linkage plate is rotatably connected to the fourth rotating shaft, and the linkage plate is rotatably connected to the sixth rotating shaft to drive the fifth rotating shaft to rotate about the third rotating shaft through the sixth rotating shaft under the drive of the fourth rotating shaft;

[0021] Or,

[0022] The linkage plate is rotatably connected to the fourth rotating shaft, and the linkage plate is rotatably connected to the fifth rotating shaft.

[0023] According to some embodiments of the present utility model, the tail plate is rotationally and limit-connected to the fixed plate to limit the rotation of the tail plate around the first rotating shaft within a preset angle range.

[0024] According to some embodiments of the present utility model, the fixed plate includes a first bottom plate portion and first side plate portions connected to opposite sides of the first bottom plate portion. The two first side plate portions are opposite and spaced apart along the second direction. The first side plate portions are connected with the first rotating shaft. The first side plate portions are provided with first limiting holes along the second direction. The fourth rotating shaft passes through the first limiting holes and is limited in the rotation angle by the first limiting holes so as to rotate around the first rotating shaft within the preset angle range.

[0025] According to some embodiments of the present utility model, the first side plate portion is provided with an installation notch communicating with the inner wall of the first limiting hole and the top wall of the first side plate portion. The installation notch is used for installing the fourth rotating shaft in the first limiting hole.

[0026] According to some embodiments of the present utility model, the tail plate includes a second bottom plate portion and second side plate portions connected to opposite sides of the second bottom plate portion. The two second side plate portions are opposite and spaced apart along the second direction. The second side plates are rotatably connected to the first rotating shaft. One of the second side plate portions is provided with a plurality of locking holes sequentially and spaced apart along the circumferential direction of the first rotating shaft. The locking holes are used for locking the rotation angle of the tail plate relative to the fixed plate.

[0027] According to some embodiments of the present utility model, a locking control structure is further included. The locking control structure includes:

[0028] A first substrate and a second substrate that are opposite and spaced apart. Both the first substrate and the second substrate are connected to the fixed plate;

[0029] A locking pin, one end of which is located between the first substrate and the second substrate, and the other end passes through the first substrate and faces the locking hole. The locking pin can move relative to the first substrate and has a locking position where it can insert into the locking hole and an unlocking position where it can escape from the locking hole;

[0030] A first elastic member, which is arranged between the locking pin and the first substrate and is used for driving the locking pin to move towards the second substrate;

[0031] A control member, one end of which is located between the first substrate and the second substrate and abuts against one end of the locking pin;

[0032] A second elastic member, which is arranged between the control member and the second substrate and is used for driving the control member to move towards the first substrate;

[0033] Wherein, the locking pin is configured such that when no external force acts on the control member, the elastic force exerted by the second elastic member is greater than or equal to the elastic force exerted by the first elastic member, and the locking pin is located at the locking position; when an external force acts on the control member and compresses the second elastic member, the locking pin is driven by the elastic force of the first elastic member, and the locking pin moves from the locking position to the unlocking position.

[0034] According to some embodiments of the present invention, the elastic assembly includes a first rotating sleeve sleeved on the second rotating shaft, a second rotating sleeve sleeved on the fifth rotating shaft, and a third elastic member disposed between the first rotating sleeve and the second rotating sleeve, and the third elastic member can elastically deform in a linear direction.

[0035] According to some embodiments of the present invention, the third elastic member includes at least two compression springs parallel to each other.

[0036] According to some embodiments of the present invention, a locking structure is further included;

[0037] The fixing plate is provided with a mounting hole for mounting one end of the lifting rod with a valve.

[0038] The locking structure includes a mounting seat and a control rod. The mounting seat is connected to the fixing plate, and the control rod is rotatably connected to the mounting seat and is used to rotate toward the side where the mounting hole is located to open or close the valve;

[0039] The mounting seat includes a main seat portion and a control shaft connected to the main seat portion. A plane perpendicular to the axis of the control shaft is defined as a projection plane, and the projection of the control shaft on the projection plane can be regarded as a large cutting circle, and the large cutting circle has at least one secant line that does not pass through the center of the circle and completely divides the circle;

[0040] The control rod includes a main rod portion, a first rotating hole provided at one end of the main rod portion, and a mounting channel communicating the inner wall of the first rotating hole and the outer wall of the main rod portion. The main rod portion is rotatably connected to the control shaft through the first rotating hole. The mounting channel forms a projection channel on the projection plane. The projection channel can allow the large cutting circle to pass through and can block the corresponding complete circle of the large cutting circle from passing through. The control rod can sequentially rotate around the control shaft to a first position, a second position, and a third position;

[0041] Wherein, the control rod is configured to: rotate around the control axis. When rotating to the first position, within the projection plane, the projection channel allows the large cutting circle to pass through, and the control axis enters or exits the first rotation hole through the installation channel; when rotating to the second position, the third position, and between the second position and the third position without passing through the first position, within the projection plane, the projection channel blocks the complete circle corresponding to the large cutting circle from passing through; when rotating to the second position, the control rod closes the valve; when rotating to the third position, the control rod opens the valve.

[0042] A seat according to a second aspect embodiment of the present invention includes:

[0043] A base and a backrest;

[0044] The chassis according to the first aspect embodiment, the bottom of the fixing plate is connected to the base, and the tail plate is connected to the backrest.

[0045] The seat according to the first aspect embodiment of the present invention has at least the following beneficial effects: By adopting the chassis in the first aspect embodiment, the size of the chassis is reduced, the manufacturing cost of the chassis is saved, the overall cost of the seat is reduced, and the large-angle adjustment requirements are met.

[0046] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0047] The following further describes the present invention in conjunction with the drawings and embodiments, where:

[0048] Figure 1 Structural schematic diagrams of the tail plate of the chassis before and after rotation in an embodiment of the present invention;

[0049] Figure 2 Exploded view of the chassis in an embodiment of the present invention;

[0050] Figure 3 Exploded structural schematic diagram of the chassis in an embodiment of the present invention;

[0051] Figure 4 Structural schematic diagram of the chassis in an embodiment of the present invention;

[0052] Figure 5 Structural schematic diagram of the locking control structure in the chassis in an embodiment of the present invention;

[0053] Figure 6Schematic diagram of the locking structure in the chassis of an embodiment of the present utility model.

[0054] Reference numerals in the attached drawings:

[0055] Fixed plate 100; First rotating shaft 110; Second rotating shaft 120; Third rotating shaft 130; First limiting hole 140; Mounting hole 150;

[0056] Tail plate 200; Fourth rotating shaft 210; Locking hole 220;

[0057] Transmission assembly 300; Fifth rotating shaft 310; Rotating pressing plate 320; Linking plate 330;

[0058] Elastic assembly 400; First rotating sleeve 410; Second rotating sleeve 420; Third elastic member 430;

[0059] Locking control structure 500; First substrate 510; Second substrate 520; Locking pin 530; Pin rod part 531; Rod cap part 532; First elastic member 540; Control member 550; Main body part 551; First guiding part 552; Second elastic member 560;

[0060] Locking structure 600; Mounting seat 610; Main seat part 611; Control shaft 612; Control rod 620; Main rod part 621; First rotating hole 622; Mounting channel 623. Detailed implementation manners

[0061] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the attached drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the attached drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0062] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0063] In the description of the present utility model, several means one or more, and multiple means two or more. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0064] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0065] Referring to Figures 1 to 6 As shown, an embodiment of the first aspect of the present utility model provides a chassis, including: a fixing plate 100, a tail plate 200, a transmission assembly 300, and an elastic assembly 400. The tail plate 200 is rotatably connected to one end of the fixing plate 100 to rotate around the fixing plate 100. One end of the elastic assembly 400 is rotatably connected to the fixing plate 100, and the other end is rotatably connected to the tail plate 200 through the transmission assembly 300 to achieve indirect transmission connection with the tail plate 200. The other end of the elastic assembly 400 does not need to be directly connected to the tail plate 200, so that the size of the elastic assembly 400 is reduced, the installation space required for the elastic assembly 400 is correspondingly reduced, the overall size of the chassis is reduced, and the cost of the elastic assembly 400 is also correspondingly reduced.

[0066] In this embodiment, the fixing plate 100 includes a first rotating shaft 110, a second rotating shaft 120, and a third rotating shaft 130 in sequence along a first direction; the fixing plate 100 includes a first bottom plate portion and first side plate portions connected to opposite sides of the first bottom plate portion. The two first side plate portions are opposite and spaced apart along a second direction, and the second direction is perpendicular to the first direction. Both ends of the first rotating shaft 110 are respectively connected to the two first side plate portions, both ends of the second rotating shaft 120 are respectively connected to the two first side plate portions, and both ends of the third rotating shaft 130 are respectively connected to the two first side plate portions. The first rotating shaft 110, the second rotating shaft 120, and the third rotating shaft 130 are all detachably connected to the two first side plate portions. Among them, along the first direction, the first rotating shaft 110 is arranged at one end of the fixing plate 100, the third rotating shaft 130 is arranged at the other end of the fixing plate 100, and the second rotating shaft 120 is arranged between the first rotating shaft 110 and the third rotating shaft 130.

[0067] The tail plate 200 is rotatably connected to the first rotating shaft 110 and can rotate around the first rotating shaft 110. The tail plate 200 includes a fourth rotating shaft 210, and the fourth rotating shaft 210 can rotate around the first rotating shaft 110; the tail plate 200 includes a second bottom plate portion and second side plate portions connected to opposite sides of the second bottom plate portion. The two second side plate portions are opposite and spaced apart along the second direction, and a part of the second side plate portion extends out of the second bottom plate portion along the first direction. The extended parts of the two second side plates are respectively rotatably connected to both ends of the first rotating shaft 110, and the second bottom plate portion is spaced apart from the first bottom plate portion, so that the tail plate 200 can rotate around the first rotating shaft 110.

[0068] The transmission assembly 300 is rotatably connected to the third rotating shaft 130. The transmission assembly 300 includes a fifth rotating shaft 310 that can rotate around the third rotating shaft 130. The fifth rotating shaft 310 is drivingly connected to the fourth rotating shaft 210 and can rotate around the third rotating shaft 130 under the drive of the fourth rotating shaft 210.

[0069] Among them, the axes of the first rotating shaft 110, the second rotating shaft 120, the third rotating shaft 130, the fourth rotating shaft 210, and the fifth rotating shaft 310 are all arranged along the second direction, and the second direction is perpendicular to the first direction; all the rotating shafts are cylindrical.

[0070] The elastic component 400 can undergo elastic deformation in a linear direction. One end of the elastic component 400 is rotatably connected to the second rotating shaft 120, and the other end is rotatably connected to the fifth rotating shaft 310; in this embodiment, the elastic component 400 undergoes elastic deformation in a linear direction through a compression spring. As another implementation manner, the elastic component 400 can also undergo elastic deformation in a linear direction through a tension spring.

[0071] Among them, the tail plate 200 is configured to: when subjected to an external force, the tail plate 200 and the fourth rotating shaft 210 rotate around the first rotating shaft 110, the fourth rotating shaft 210 drives the fifth rotating shaft 310 to rotate around the third rotating shaft 130 through the transmission assembly 300, and the elastic component 400 stores elastic potential energy; when the external force is removed, the elastic component 400 drives the tail plate 200 to reset.

[0072] It should be understood that one end of the elastic component 400 is rotatably connected to the second rotating shaft 120. The second rotating shaft 120 is located between the first rotating shaft 110 and the third rotating shaft 130. The other end of the elastic component 400 is rotatably connected to the fifth rotating shaft 310 and is indirectly drivingly connected to the tail plate 200 through the transmission assembly 300, shortening the distance between the other end of the elastic component 400 and the tail plate 200, making the size of the elastic component 400 smaller and the occupied space smaller, and the overall size of the chassis can be optimized to reduce the cost of the chassis; the other end of the elastic component 400 is indirectly connected to the tail plate 200 through the transmission assembly 300. The elastic component 400 and the tail plate 200 exist independently, and the elastic component 400 has less restriction on the rotation angle of the tail plate 200. The tail plate 200 can have a larger rotation angle, the backrest can have a larger rotation angle, the backrest can be adjusted at a large angle, and it can better meet the usage needs of users.

[0073] Refer to Figure 3As shown, in some specific embodiments of the present utility model, the transmission assembly 300 includes a rotating pressing plate 320 and a linkage plate 330. The rotating pressing plate 320 is rotatably connected to the third rotating shaft 130 and can rotate around the third rotating shaft 130. The rotating pressing plate 320 includes a fifth rotating shaft 310, and the fifth rotating shaft 310 can rotate around the third rotating shaft 130; the linkage plate 330 is drivingly connected to the fourth rotating shaft 210 and the fifth rotating shaft 310 to drive the fifth rotating shaft 310 to rotate around the third rotating shaft 130 under the drive of the fourth rotating shaft 210.

[0074] It should be understood that the fifth rotating shaft 310 is both rotatably connected to the other end of the elastic component 400 and connected to the linkage plate 330. The elastic component 400 and the linkage plate 330 share the same rotating shaft, which saves material costs more, simplifies the design, and is more convenient for installation.

[0075] It should be noted that the first rotating shaft 110, the fourth rotating shaft 210, the fifth rotating shaft 310, and the third rotating shaft 130 are sequentially connected to form a parallelogram linkage structure. The first rotating shaft 110 and the third rotating shaft 130 are fixed fulcrums. When the fourth rotating shaft 210 rotates, it will drive the fifth rotating shaft 310 to rotate around the third rotating shaft 130, causing the elastic component 400 between the second rotating shaft 120 and the fifth rotating shaft 310 to undergo elastic deformation and store elastic potential energy.

[0076] In this embodiment, the rotating pressing plate 320 includes a third bottom plate portion and two third side plate portions provided on opposite sides of the third bottom plate portion. The two ends of the fifth rotating shaft 310 are respectively connected to the two third side plate portions, and the end portion of the fifth rotating shaft 310 penetrates through the third side plate portion. Among them, the portion of the fifth rotating shaft 310 located between the two third side plate portions is rotatably connected to the other end of the elastic component 400. The linkage plate 330 includes a fourth bottom plate portion and two fourth side plate portions provided on opposite sides of the fourth bottom plate portion. The two fourth side plate portions are respectively rotatably connected to the portions of the two ends of the fifth rotating shaft 310 extending out of the third side plate portion. In addition, the linkage plate 330 is connected to the seat frame. When the tail plate 200 rotates and the seat backrest tilts backward, the linkage plate 330 will also tilt backward by a certain angle, causing the seat frame to tilt backward by a certain angle, and the posture between the seat frame and the backrest is more conformable to the lying posture of the human body, making the user more comfortable when sitting or lying.

[0077] In some other embodiments of the present utility model, the rotating pressing plate 320 further includes a sixth rotating shaft, and the axis of the sixth rotating shaft is arranged along the second direction; the linkage plate 330 is rotatably connected to the fourth rotating shaft 210, and the linkage plate 330 is rotatably connected to the sixth rotating shaft to drive the fifth rotating shaft 310 to rotate around the third rotating shaft 130 through the sixth rotating shaft under the drive of the fourth rotating shaft 210; or, the linkage plate 330 is rotatably connected to the fourth rotating shaft 210, and the linkage plate 330 is rotatably connected to the fifth rotating shaft 310.

[0078] It should be understood that the fifth rotating shaft 310 is rotatably connected to the other end of the elastic component 400, the sixth rotating shaft is rotatably connected to the linkage plate 330, and the rotating pressing plate 320 is connected to the linkage plate 330 through a separate sixth rotating shaft, so that the range of the designed position of the fifth rotating shaft 310 is larger, and the fifth rotating shaft 310 and the sixth rotating shaft can be respectively arranged at appropriate positions on the rotating pressing plate 320, and the design of the fifth rotating shaft 310 is more diverse.

[0079] Referring to Figure 2 and Figure 3 As shown, in some other embodiments of the present invention, the tail plate 200 is rotationally and limit-connected to the fixed plate 100 to limit the rotation of the tail plate 200 around the first rotating shaft 110 within a preset angle range.

[0080] In some specific embodiments of the present invention, the fixed plate 100 includes a first bottom plate portion and first side plate portions connected to opposite sides of the first bottom plate portion. The two first side plate portions are opposite and spaced apart along the second direction. The first side plate portions are connected with the first rotating shaft 110, and the first side plate portions are provided with first limiting holes 140 along the second direction. The fourth rotating shaft 210 is inserted through the first limiting holes 140 and is restricted in its rotation angle by the first limiting holes 140 to rotate around the first rotating shaft 110 within a preset angle range.

[0081] It should be understood that by restricting the rotation angle of the fourth rotating shaft 210 through the first limiting holes 140, the tail plate 200 rotates around the first rotating shaft 110 within a preset angle range, and the rotation of the tail plate 200 is restricted and reliable within the preset angle range.

[0082] In this embodiment, the first limiting holes 140 are arc-shaped holes in an arc segment shape along the circumferential direction of the first rotating shaft 110. The angle corresponding to the arc-shaped holes is the angle at which the tail plate 200 can rotate relative to the fixed plate 100, that is, the preset angle range. The angle of the arc-shaped holes along the circumferential direction of the first rotating shaft 110 can be designed as required.

[0083] Referring to Figure 2 and Figure 3 As shown, in some specific embodiments of the present invention, the first side plate portion is provided with an installation notch communicating with the inner wall of the first limiting hole 140 and the top wall of the first side plate portion. The installation notch is used for installing the fourth rotating shaft 210 in the first limiting hole 140.

[0084] It should be understood that when the tail plate 200 and the fixed plate 100 are installed, the fourth rotating shaft 210 can be directly inserted into the first limiting hole 140 through the installation notch, saving the installation steps, and the installation efficiency of the tail plate 200 is higher and the installation is more convenient.

[0085] Referring to Figure 2As shown, in some specific embodiments of the present utility model, the tail plate 200 includes a second bottom plate portion and second side plate portions connected to opposite sides of the second bottom plate portion. The two second side plate portions are opposite and spaced apart along the second direction. The second side plate is rotatably connected to the first rotating shaft 110. A plurality of locking holes 220 are arranged at intervals in the circumferential direction of the first rotating shaft 110 on one second side plate portion. The locking holes 220 are used to lock the rotation angle of the tail plate 200 relative to the fixed plate 100.

[0086] It should be understood that the locking holes 220 are used in cooperation with the locking pins on the fixed plate 100. When the locking pins are inserted into the locking holes 220, the tail plate 200 and the fixed plate 100 remain relatively fixed. When the locking pins are disengaged from the locking holes 220, the tail plate 200 rotates relative to the fixed plate 100 around the first rotating shaft 110. Moreover, the plurality of locking holes 220 enable the tail plate 200 and the fixed plate 100 to remain relatively fixed at different included angles. There are more choices for the included angle between the tail plate 200 and the fixed plate 100, the adjustment range of the tail plate 200 by the user is wider, and it is easier for the user to find a suitable included angle for themselves, improving the comfort of use.

[0087] In this embodiment, the two second side plate portions are located between the two first side plate portions. A plurality of locking holes 220 in the circumferential direction of the first rotating shaft 110 are provided on one second side plate portion. A locking structure is arranged on the first bottom plate portion between the two second side plate portions, and the locking of the tail plate 200 is realized through a retractable locking pin. Among them, when the locking pin extends, the locking pin is inserted into a locking hole 220 to lock the tail plate 200, so that the tail plate 200 cannot rotate relative to the fixed plate 100; when the locking pin contracts, the locking pin disengages from the locking hole 220 to release the locking of the tail plate 200, so that the tail plate 200 can rotate relative to the fixed plate 100.

[0088] Refer to Figure 4 And Figure 5As shown, in some specific embodiments of the present utility model, the chassis further includes a locking control structure 500. The locking control structure 500 includes: a first substrate 510 and a second substrate 520 that are opposite and spaced apart, a locking pin 530, a first elastic member 540, a control member 550, and a second elastic member 560. The locking pin 530 and the control member 550 are in contact with each other between the first substrate 510 and the second substrate 520. The side of the locking pin 530 away from the control member 550 is the first substrate 510. The first elastic member 540 is disposed between the locking pin 530 and the first substrate 510. The second elastic member 560 is disposed between the control member 550 and the second substrate 520. And the first elastic member and the second elastic member 560 are in a dynamic balance state through the abutting locking pin 530 and control member 550. When an external force acts on the control member 550 and the control member 550 moves towards the second substrate 520 and compresses the second elastic member 560, the first elastic member 540 releases an elastic force to drive the locking pin 530 to move towards the second substrate 520, so that the locking pin 530 can maintain an abutting state with the control member 550. At the same time, the position of the locking pin 530 relative to the first substrate 510 changes to achieve the locking or unlocking function.

[0089] In this embodiment, the first substrate 510 and the second substrate 520 are opposite and spaced apart. The first substrate 510 and the second substrate 520 are fixed to the fixing plate 100 of the chassis. Specifically, the first substrate 510 and the second substrate 520 can be connected to the fixing plate 100 in the same connection manner. For example, the first substrate 510 and the second substrate 520 can be integrally formed with the fixing plate 100, or welded together, or locked and connected by fasteners, or snapped onto the fixing plate 100 by a snap; the first substrate 510 and the second substrate 520 can also be connected to the fixing plate 100 in different connection manners. For example, the first substrate 510 is welded to the fixing plate 100, and the second substrate 520 is integrally formed with the fixing plate 100.

[0090] One end of the locking pin 530 is located between the first substrate 510 and the second substrate 520, and the other end passes through the first substrate 510. The locking pin 530 can move relative to the first substrate 510 and has a locking position and an unlocking position. Specifically, the locking pin 530 includes a pin rod portion 531 and a rod cap portion 532 connected to one end of the pin rod portion 531. The first elastic member 540 is sleeved on the pin rod portion 531, and one end abuts against the pin rod portion 531, and the other end abuts against the first substrate 510. The pin rod portion 531 guides the first elastic member 540 so that the first elastic member 540 undergoes elastic deformation along its own axis direction, providing a suitable working condition for the first elasticity and improving the service life of the first elastic member 540. The pin rod portion 531 is cylindrical or rectangular columnar or other geometric columnar, and the rod cap portion 532 can also be cylindrical or rectangular columnar or other geometric columnar. The shapes of the pin rod portion 531 and the rod cap portion 532 can be the same or different. For example, both the pin rod portion 531 and the rod cap portion 532 are cylindrical, or the pin rod portion 531 is cylindrical and the rod cap portion 532 is rectangular columnar.

[0091] The first elastic member 540 is a compression spring. The first elastic member 540 is arranged between the locking pin 530 and the first substrate 510 in a pre-compressed state. The elastic potential energy stored by the pre-compression of the first elastic member 540 is used to drive the locking pin 530 to move towards the second substrate 520.

[0092] One end of the control member 550 is located between the first substrate 510 and the second substrate 520 and abuts against one end of the locking pin 530. The end face of one end of the control member 550 is circular and covers the end face of one end of the locking pin 530, so that the end face of the locking pin 530 is in complete abutment with the end face of the control member 550, and the abutment is more reliable. Specifically, the control member 550 includes a main body portion 551 and a first guiding portion 552 connected to one end of the main body portion 551 away from the first substrate 510. The first guiding portion 552 is inserted into the second elastic member 560. One end of the main body portion 551 away from the first substrate 510 stops one end of the second elastic member 560. The main body portion 551 can be cylindrical or rectangular columnar or other geometric columnar. The first guiding portion 552 limits the second elastic member 560 so that the second elastic member 560 undergoes elastic deformation along its own axis direction. The first guiding portion 552 provides a suitable working condition for the second elasticity and improves the service life of the second elastic member 560. At the same time, the second elastic member 560 is not easily separated from the main body portion 551, and the use is more reliable.

[0093] The second elastic member 560 is also a compression spring. The second elastic member 560 is disposed between the control member 550 and the second substrate 520 in a pre-compressed state. The elastic potential energy stored by the pre-compression of the second elastic member 560 is used to drive the control member 550 to move towards the first substrate 510. Among them, the elastic coefficient of the second elastic member 560 is greater than that of the first elastic member 540. The elastic coefficient of the compression spring is related to the wire diameter of the compression spring, the diameter of the compression spring, and the effective number of turns of the compression spring.

[0094] Among them, after the installation is completed, the second elastic member 560 and the first elastic member 540 are in a dynamic equilibrium state. When the control member 550 is not subjected to an external force, the elastic force exerted by the second elastic member 560 is greater than or equal to the elastic force exerted by the first elastic member 540, so that the locking pin 530 can maintain the state of being inserted into the locking hole 220 and is not easily disengaged from the locking hole 220; and because one end of the locking pin 530 inserted into the locking hole 220 abuts against the fixing plate 100, when the elastic force exerted by the second elastic member 560 is greater than the elastic force exerted by the first elastic member 540, the elastic force of the second elastic member 560 can drive the locking pin 530 to abut against the fixing plate 100, making the locking pin 530 even less likely to disengage from the locking hole 220. The locking pin 530 can continuously remain in the locking position, improving the reliability of the use of the locking pin 530. When the control member 550 is subjected to an external force and compresses the second elastic member 560, the locking pin 530 is driven by the elastic force of the first elastic member 540, and the locking pin 530 moves from the locking position to the unlocking position, realizing the switching of the position of the locking pin 530, and further realizing inserting into or disengaging from the locking hole 220.

[0095] It is worth understanding that when the locking pin 530 is disengaged from the locking hole 220 by an external force, such as removing the external force, the control member 550 drives the locking pin 530 to move towards the inside of the locking hole 220 under the action of the second elastic member 560. The first elastic member 540 is compressed during this process to store the elastic potential energy released by the second elastic member 560, and at the same time plays a buffering role, reducing the impact force of the locking pin 530 moving towards the locking hole 220 direction, reducing noise, and avoiding damage caused by long-term collision of the locking pin 530, improving the service life of the locking pin 530.

[0096] Refer to Figure 2 and Figure 3 As shown, in some specific embodiments of the present invention, the elastic component 400 includes a first rotating sleeve 410 sleeved on the second rotating shaft 120, a second rotating sleeve 420 sleeved on the fifth rotating shaft 310, and a third elastic member 430 disposed between the first rotating sleeve 410 and the second rotating sleeve 420. The third elastic member 430 can elastically deform along a straight line direction.

[0097] It should be understood that the third elastic member 430 is rotatably connected to the second rotating shaft 120 through the first rotating sleeve 410 and rotatably connected to the fifth rotating shaft 310 through the second rotating sleeve 420. The first rotating sleeve 410 and the second rotating sleeve 420 fix and guide the third elastic member 430 to elastically deform in a linear direction, improving the reliability of the third elastic member 430 during use. At the same time, the third elastic member 430 is guided so that the third elastic member 430 elastically deforms in the designed linear direction to approach the maximum theoretical life cycle, thereby improving the service life of the third elastic member 430 during long-term use.

[0098] In this embodiment, a first abutting seat is provided on the outer peripheral surface of the first rotating sleeve 410. The seat surface of the first abutting seat is circular and larger than the radial cross-section of the third elastic member 430. A guiding shaft is provided in the middle of the first abutting seat. The guiding shaft is inserted into one end of the third elastic member 430 and is limited and guided by the guiding shaft. A second abutting seat is provided on the outer peripheral surface of the second rotating sleeve 420. The seat surface of the second abutting seat is circular and larger than the radial cross-section of the third elastic member 430. A guiding shaft sleeve is provided in the middle of the second abutting seat. The guiding shaft sleeve is inserted into the other end of the third elastic member 430, and the guiding shaft is inserted into the guiding shaft sleeve. The third elastic member 430 is limited and guided by the guiding shaft and the guiding shaft sleeve, so that the third elastic member 430 elastically deforms in the designed linear direction.

[0099] Refer to Figure 3 As shown, in some specific embodiments of the present utility model, the third elastic member 430 includes at least two parallel compression springs.

[0100] It should be understood that the number of the third elastic members 430 is multiple. A greater supporting force is provided by the multiple third elastic members 430 to support the pressure of the human body rotating the backrest, improving the reliability of use. Moreover, when the number of the third elastic members 430 increases, the pressure received by a single third elastic member 430 decreases, which is beneficial to improving the service life of the third elastic member 430.

[0101] In this embodiment, the number of the third elastic members 430 is two, and they are two compression springs. The first rotating sleeve 410 is provided with two first abutting seats spaced apart along the second direction. The second rotating sleeve 420 is provided with two second abutting seats spaced apart along the second direction. Each first abutting seat is aligned with a second abutting seat, and a compression spring is arranged between the aligned two.

[0102] Refer to FIG. Figure 4 And Figure 6 As shown, in some specific embodiments of the present utility model, the chassis further includes a locking structure 600;

[0103] The fixing plate 100 is provided with an installation hole 150 for installing the end of the lifting rod having a valve;

[0104] The locking structure 600 is used to control the valve of the lifting rod. The locking structure 600 includes: a mounting seat 610 and a control rod 620. The control rod 620 can directly insert the first rotating hole 622 from the outer peripheral surface of the control shaft 612 through the mounting channel 623, so that the installation is simpler and more convenient. In the process of the control rod 620 rotating around the control shaft 612 through the first rotating hole 622, the control rod 620 cannot be separated from the control shaft 612 through the mounting channel 623, and the use of the control rod 620 is reliable. The control rod 620 rotates around the control shaft 612 toward the mounting hole 150, so that the control rod 620 can control the valve in the mounting hole 150.

[0105] In this embodiment, the mounting seat 610 includes a main seat portion 611 and a control shaft 612 connected to the main seat portion 611. The mounting seat 610 is installed on the upper surface of the fixed plate 100. The control shaft 612 is connected to the main seat portion 611 and remains suspended to install the control rod 620 and avoid the rotation range of the control rod 620. The plane along the axis perpendicular to the control shaft 612 is defined as the projection plane. The projection of the control shaft 612 on the projection plane can be regarded as a large cut circle, and the large cut circle has at least one cut line that does not pass through the center of the circle and completely divides the circle.

[0106] It should be noted that, first, the formation of the great cut circle includes the following two situations: when a complete circle is divided by a cut line, the complete circle is divided into a circle with a larger area and a circle with a smaller area, wherein the circle with a larger area is called the great cut circle, such as Figure 4 As shown in Figure Ⅰ; when a complete circle is divided by multiple secants, the complete circle is divided into multiple secants. There are two points on the arc of one secant, and the line between the two points forms the diameter line of the complete circle. This part of the secant is the large secant. For example, a complete circle is divided into three secants by two secants that are parallel to each other and do not pass through the center of the circle. Among them, the large secant has two secants that are parallel to each other and do not pass through the center of the circle, such as Figure 4 As shown in Figure II.

[0107] Second, the projection of the control axis 612 on the projection plane can be regarded as a large cut circle including the following situations: a. When the line that cuts the circle in the projection of the control axis 612 is a straight line, the projection of the control axis 612 forms a large cut circle, such as Figure 4 As shown in Figure Ⅰ; b. When the line that cuts off the circle in the projection of the control axis 612 (hereinafter referred to as the cutting line) is a plurality of sequentially connected straight line segments, arcs, or a combination of the two, if the cutting line is concave inward, the line connecting the two intersection points of the cutting line and the arc of the complete circle forms a virtual cut line, and the complete circle with the cutting line concave inward can be regarded as a large cut circle cut by the virtual cut line, such as Figure 4As shown in Figures III and IV; c. If the cutting line bulges outwards, when the cutting line consists of multiple straight line segments, extend the first straight line segment or the last straight line segment until it intersects with the complete circle. The first straight line segment and its extension form a virtual cutting line, or the last straight line segment and its extension form a virtual cutting line. The complete circle with the cutting line indented outwards can be regarded as a large cutting circle cut by the virtual cutting line, as shown in Figure 4 Figure V; d. If the cutting line bulges outwards and is an arc segment, then the tangent of the arc segment forms a virtual cutting line. The complete circle with the cutting line indented outwards can be regarded as a large cutting circle cut by the virtual cutting line, as shown in Figure 4 Figure VI. Among them, the virtual cutting line needs to cut the complete circle.

[0108] The control rod 620 includes a main rod portion 621, a first rotation hole 622 provided at one end of the main rod portion 621, and an installation channel 623 communicating the inner wall of the first rotation hole 622 and the outer wall of the main rod portion 621. The main rod portion 621 is rotationally connected to the control shaft 612 through the first rotation hole 622. The installation channel 623 forms a projection channel on the projection plane. The projection channel can allow the large cutting circle to pass through and can block the corresponding complete circle of the large cutting circle from passing through. The control rod 620 can sequentially rotate around the control shaft 612 to a first position, a second position, and a third position.

[0109] In this embodiment, referring to Figures 2 to 3 as shown, the inner diameter of the first rotation hole 622 is adapted to the outer diameter of the control shaft 612, and the main rod portion 621 can rotate around the control shaft 612 through the first rotation hole 622. The large cutting circle formed by the control rod 620 on the projection plane has a minimum passing size and a maximum passing size. The maximum passing size is the diameter of the complete circle; the minimum passing size is divided into the following situations: when there is only one cutting line (including the virtual cutting line), the minimum passing size is: the length of the straight line segment perpendicular to the cutting line, passing through the center of the circle, and intersecting the arc of the large cutting circle; when there are two mutually parallel cutting lines, the minimum passing size is: the length of the straight line segment perpendicular to the two cutting lines.

[0110] The minimum passing size is smaller than the maximum passing size. When the size of the projection channel is greater than or equal to the minimum passing size and smaller than the maximum passing size, the projection channel allows the large cutting circle to pass through and can block the corresponding complete circle of the large cutting circle from passing through. When the projection channel allows the large cutting circle to pass through, the control rod 620 is in the first position. When the projection channel blocks the corresponding complete circle of the large cutting circle from passing through, the control rod 620 is in the second position or the third position.

[0111] Among them, the control rod 620 is configured such that the control rod 620 rotates around the control axis 612. When rotated to the first position, within the projection plane, the projection channel allows the large cutting circle to pass through, and the control axis 612 enters or exits the first rotation hole 622 through the installation channel 623; when rotated to the second position, the third position, and between the second position and the third position without passing through the first position, within the projection plane, the projection channel blocks the corresponding complete circle of the large cutting circle from passing through; when rotated to the second position, the control rod 620 closes the valve; when rotated to the third position, the control rod 620 opens the valve. In this embodiment, a return spring is provided between the other end of the control rod 620 and the upper surface of the chassis of the lift chair. When the control rod 620 is subjected to an external force and rotates from the second position to the third position, the return spring stores elastic potential energy; when the external force is removed, the return spring releases the elastic potential energy, causing the control rod 620 to return to the second position.

[0112] It should be understood that when the control rod 620 is adjusted to the first position, the control rod 620 is installed on the control axis 612 through the installation channel 623, and the installation steps of the control rod 620 are simpler and more convenient; at the same time, when the control rod 620 rotates between the second position and the third position without passing through the first position, the control rod 620 will not rotate to the first position. Therefore, when the control rod 620 rotates between the second position and the third position, the control rod 620 cannot escape from the rotating shaft through the installation channel 623, and the connection between the control rod 620 and the control axis 612 is reliable, meeting the requirements of normal use.

[0113] In a second aspect embodiment of the present utility model, a seat is proposed, including: a base, a backrest, and the chassis of the first aspect embodiment. The bottom of the fixing plate 100 is connected to the base, and the tail plate 200 is connected to the backrest. It should be understood that the seat adopts the chassis in the first aspect embodiment, reducing the size of the chassis, saving the manufacturing cost of the chassis, reducing the overall cost of the seat, and meeting the requirements of large-angle adjustment.

[0114] The above has described the embodiments of the present utility model in detail with reference to the drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art to which it pertains, various changes can be made without departing from the gist of the present utility model.

Claims

1. A chassis, characterized in that: include: The fixed plate comprises a first rotating shaft, a second rotating shaft and a third rotating shaft in sequence along a first direction; a tailgate, rotatably connected to the first rotating shaft and capable of rotating around the first rotating shaft, the tailgate comprising a fourth rotating shaft, the fourth rotating shaft being capable of rotating around the first rotating shaft; A transmission assembly, rotatably connected to the third rotating shaft, the transmission assembly comprising a fifth rotating shaft capable of rotating around the third rotating shaft, the fifth rotating shaft being transmission-connected to the fourth rotating shaft and capable of rotating around the third rotating shaft driven by the fourth rotating shaft; Wherein, the axes of the first rotating shaft, the second rotating shaft, the third rotating shaft, the fourth rotating shaft and the fifth rotating shaft are all arranged along the second direction, and the second direction is perpendicular to the first direction; An elastic component capable of elastically deforming in a linear direction, one end of the elastic component being rotatably connected to the second rotating shaft, and the other end of the elastic component being rotatably connected to the fifth rotating shaft; Wherein, the tail plate is configured as follows: when subjected to external force, the tail plate and the fourth rotating shaft rotate around the first rotating shaft, the fourth rotating shaft drives the fifth rotating shaft to rotate around the third rotating shaft through the transmission assembly, and the elastic assembly stores elastic potential energy; when the external force is lost, the elastic assembly drives the tail plate to reset.

2. The chassis according to claim 1, characterized in that: The transmission assembly comprises: A rotating pressure plate, which is rotatably connected to the third rotating shaft and can rotate around the third rotating shaft, wherein the rotating pressure plate includes the fifth rotating shaft, and the fifth rotating shaft can rotate around the third rotating shaft; The linkage plate is transmission-connected to the fourth rotating shaft and the fifth rotating shaft, so as to drive the fifth rotating shaft to rotate around the third rotating shaft under the drive of the fourth rotating shaft.

3. The chassis according to claim 2, characterized in that: The rotating pressure plate further comprises a sixth rotating shaft, the axis of which is arranged along the second direction; The linkage plate is rotatably connected to the fourth rotating shaft, and the linkage plate is rotatably connected to the sixth rotating shaft, so that the fifth rotating shaft is driven to rotate around the third rotating shaft through the sixth rotating shaft under the drive of the fourth rotating shaft; or, The linkage plate is rotationally connected to the fourth rotating shaft, and the linkage plate is rotationally connected to the fifth rotating shaft.

4. The chassis according to claim 1, characterized in that: The tail plate rotation limiter is connected to the fixing plate to limit the tail plate from rotating around the first rotation axis within a preset angle range.

5. The chassis according to claim 4, characterized in that: The fixed plate includes a first bottom plate portion and a first side plate portion connected to the opposite side of the first bottom plate portion, the two first side plate portions are arranged opposite to each other and spaced apart along the second direction, the first side plate portion is connected to the first rotating shaft, the first side plate portion is provided with a first limiting hole along the second direction, the fourth rotating shaft is passed through the first limiting hole, and the rotation angle is limited by the first limiting hole so as to rotate around the first rotating shaft within the preset angle range.

6. The chassis according to claim 1, characterized in that: The tail plate includes a second bottom plate portion and a second side plate portion connected to the opposite side of the second bottom plate portion, the two second side plate portions are arranged opposite to each other and spaced apart along the second direction, the second side plate is rotatably connected to the first rotating shaft, and one of the second side plate portions is provided with a plurality of locking holes spaced apart in sequence along the circumferential direction of the first rotating shaft, the locking holes being used to lock the rotation angle of the tail plate relative to the fixed plate.

7. The chassis according to claim 6, characterized in that Also included is a locking control structure, the locking control structure comprising: A first substrate and a second substrate are opposite and spaced apart from each other, wherein the first substrate and the second substrate are both connected to the fixing plate; A locking pin, one end of which is located between the first substrate and the second substrate, and the other end of which is disposed through the first substrate and faces the locking hole, wherein the locking pin can move relative to the first substrate and has a locking position for inserting into the locking hole and an unlocking position for exiting from the locking hole; a first elastic member, disposed between the locking pin and the first substrate, and used for driving the locking pin to move toward the second substrate; A control member, one end of which is located between the first substrate and the second substrate and abuts against one end of the locking pin; a second elastic member, disposed between the control member and the second substrate, and used for driving the control member to move toward the first substrate; Wherein, the locking pin is configured as follows: when the control member is not subjected to external force, the elastic force applied by the second elastic member is greater than or equal to the elastic force applied by the first elastic member, and the locking pin is located in the locking position; when the control member is subjected to external force and the second elastic member is compressed, the locking pin is driven by the elastic force of the first elastic member, and the locking pin moves from the locking position to the unlocking position.

8. The chassis according to claim 1, characterized in that: The elastic component includes a first rotating sleeve sleeved on the second rotating shaft, a second rotating sleeve sleeved on the fifth rotating shaft, and a third elastic member arranged between the first rotating sleeve and the second rotating sleeve, and the third elastic member can be elastically deformed along a linear direction.

9. The chassis according to claim 1, characterized in that: Also includes a locking structure; The fixing plate is provided with a mounting hole for mounting one end of the lifting rod having a valve; The locking structure comprises a mounting seat and a control rod, wherein the mounting seat is connected to the fixing plate, and the control rod is rotatably connected to the mounting seat and is used to rotate toward the side where the mounting hole is located to open or close the valve; The mounting seat comprises a main seat portion and a control shaft connected to the main seat portion, a surface along an axis perpendicular to the control shaft is defined as a projection surface, the projection of the control shaft on the projection surface can be regarded as a large cut circle, and the large cut circle has at least one cut line that does not pass through the center of the circle and completely divides the circle; The control rod comprises a main rod portion, a first rotating hole provided at one end of the main rod portion, and a mounting channel communicating with an inner wall of the first rotating hole and an outer wall of the main rod portion, the main rod portion is rotatably connected to the control shaft through the first rotating hole, the mounting channel forms a projection channel on the projection surface, the projection channel can allow the large cut circle to pass through, and can block the full circle corresponding to the large cut circle from passing through, and the control rod can rotate around the control shaft to a first position, a second position, and a third position in sequence; Wherein, the control rod is configured as follows: the control rod rotates around the control axis, and when the control rod rotates to the first position, within the projection plane, the projection channel allows the large cut circle to pass through, and the control axis enters or leaves the first rotating hole through the mounting channel; when the control rod rotates to the second position, the third position, and between the second position and the third position, and does not pass through the first position, within the projection plane, the projection channel blocks the full circle corresponding to the large cut circle from passing through; when the control rod rotates to the second position, the control rod closes the valve; when the control rod rotates to the third position, the control rod opens the valve.

10. A seat, characterized in that: include: Base, backrest; The chassis according to any one of claims 1 to 9, wherein the bottom of the fixing plate is connected to the base, and the tail plate is connected to the backrest.

Images