Chassis mechanism and backrest adjustable seat

Abstract

This invention provides a backrest mechanism and an adjustable backrest seat. The chassis mechanism includes a chassis, a connecting seat, and an adjustment assembly. The adjustment assembly includes an adjustment block, a rotating wheel, a driving component, and a transition component. The chassis has a sliding groove, in which the adjustment block is slidably disposed, and the adjustment block is connected to the driving component. The driving component surrounds the rotating wheel and the transition component. The rotating wheel can rotate relative to the chassis to pull the driving component, thereby causing the adjustment block to slide along the sliding groove. The sliding of the adjustment block can change the angle of the connecting seat relative to the chassis, thereby changing the angle of the backrest relative to the seat cushion. The chassis mechanism and adjustable backrest seat provided by this invention enable both forward and reverse adjustment of the seat back angle to have good precision.

Description

Technical Field

[0001] This invention relates to the field of seating technology, and more particularly to a chassis mechanism and an adjustable backrest seat. Background Technology

[0002] To improve comfort and usability, some chairs on the market offer adjustable backrest angles relative to the seat cushion. However, current backrest tilt adjustment mechanisms struggle to achieve precise forward and reverse angle adjustments simultaneously. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a chassis mechanism that enables good accuracy in both forward and reverse adjustment of the seat back angle.

[0004] The present invention also provides an adjustable backrest seat including the aforementioned chassis mechanism.

[0005] A chassis mechanism according to a first aspect of the present invention includes: a chassis for connection to a seat cushion, the chassis having a sliding groove; a connecting seat for connection to a backrest, the connecting seat being rotatably connected to the chassis; and an adjustment assembly including an adjustment block, a rotating wheel, a transition member, and a driving member, the adjustment block being slidably disposed in the sliding groove, the driving member surrounding the rotating wheel and the transition member, and both ends of the adjustment block along its sliding direction being connected to the driving member; the rotating wheel being rotatable relative to the chassis to pull the driving member, thereby causing the adjustment block to slide along the sliding groove, the sliding of the adjustment block being able to change the angle of the chassis relative to the connecting seat.

[0006] The chassis mechanism according to embodiments of the present invention has at least the following beneficial effects: because the driving member surrounds the rotating wheel and the transition member, regardless of whether the rotating wheel rotates clockwise or counterclockwise, the driving member can pull the adjusting block to move, thereby changing the angle of the backrest. Therefore, the adjustable backrest seat of the present invention has high stability and accuracy in both forward and reverse adjustment of the backrest.

[0007] According to some embodiments of the present invention, the chassis mechanism further includes a retaining block, the retaining block being fixed relative to the connecting seat, the adjusting block having a plurality of retaining surfaces on the side facing away from the chassis, one end of the retaining block being able to abut against the retaining surfaces to prevent the connecting seat from rotating relative to the chassis; the plurality of retaining surfaces are distributed along the sliding direction of the adjusting block, and adjacent retaining surfaces are spaced apart along the rotation direction of the connecting seat.

[0008] According to some embodiments of the present invention, the chassis has a plurality of positioning grooves distributed along the sliding direction of the adjusting block, the adjusting assembly further includes a positioning member and an elastic member, the two ends of the elastic member being connected to the adjusting block and the positioning member respectively; the elastic force of the elastic member is used to drive the positioning member away from the adjusting block and to make the positioning member enter the positioning groove, the groove wall of the positioning groove being able to abut against the positioning member to prevent the adjusting block from sliding.

[0009] According to some embodiments of the present invention, the adjusting block has a receiving cavity, the elastic member is received in the receiving cavity, a portion of the positioning member is disposed in the receiving cavity, and one end of the elastic member away from the positioning member is connected to the wall of the receiving cavity.

[0010] According to some embodiments of the present invention, the driving member includes: a first rope body, with both ends connected to the rotating wheel and the adjusting block respectively; a second rope body, separately disposed from the first rope body, with both ends of the second rope body connected to the rotating wheel and the adjusting block respectively, and both ends of the adjusting block along its own sliding direction connected to the first rope body and the second rope body respectively; a portion of the first rope body surrounds the transition member, a portion of the first rope body and a portion of the second rope body surround the rotating wheel, and the directions of the first rope body and the second rope body surrounding the rotating wheel are opposite.

[0011] According to some embodiments of the present invention, the first rope body includes a first rope and a first connector, the first connector being connected to the end of the first rope near the spool; the second rope body includes a second rope and a second connector, the second connector being connected to the end of the second rope near the spool; the first rope and the second rope surround the spool; the spool has a first mounting groove and a second mounting groove, the first connector being accommodated in the first mounting groove, the second connector being accommodated in the second mounting groove, the groove wall of the first mounting groove being able to abut against the first connector so that the first connector can rotate synchronously with the spool, and the groove wall of the second mounting groove being able to abut against the second connector so that the second connector can rotate synchronously with the spool.

[0012] According to some embodiments of the present invention, the outer periphery of the spool has a third mounting groove and a fourth mounting groove, the third mounting groove communicating with the first mounting groove and the fourth mounting groove communicating with the second mounting groove; both the third mounting groove and the fourth mounting groove are arranged along the circumference of the spool, the third mounting groove accommodating a portion of the first rope and the fourth mounting groove accommodating a portion of the second rope.

[0013] According to some embodiments of the present invention, along the sliding direction of the adjusting block, the two ends of the adjusting block respectively have a fifth mounting groove and a sixth mounting groove; the first rope further includes a third connector, the third connector being connected to the end of the first rope away from the rotating wheel, the third connector being accommodated in the fifth mounting groove, and the groove wall of the fifth mounting groove being able to abut against the third connector, so that the first rope pulls the adjusting block to move; the second rope further includes a fourth connector, the fourth connector being connected to the end of the second rope away from the rotating wheel, the fourth connector being accommodated in the sixth mounting groove, and the groove wall of the sixth mounting groove being able to abut against the fourth connector, so that the second rope pulls the adjusting block to move.

[0014] According to some embodiments of the present invention, the chassis has cable management grooves, and a portion of the drive member is disposed in the cable management grooves.

[0015] According to a second aspect of the present invention, a seat includes: a chassis mechanism according to a first aspect of the present invention; a seat cushion connected to the chassis; and a backrest connected to the connecting seat.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a side view of an adjustable backrest seat according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A diagram illustrating another angle of the adjustable backrest seat;

[0020] Figure 3 for Figure 2 A partial schematic diagram of the sliding block of the structure shown;

[0021] Figure 4 This is a schematic diagram illustrating the relationship between the rotating wheel and the knob in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the adjustment block in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram illustrating the cooperation relationship between the adjusting block, the positioning element, and the elastic element in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram illustrating the movement principle of the adjusting block in an embodiment of the present invention;

[0025] Figure 8 for Figure 7 A schematic diagram showing the adjustment block moving in opposite directions;

[0026] Figure 9 This is a diagram showing the backrest reclining at the first angle.

[0027] Figure 10 This is a diagram showing the backrest reclining at the second angle.

[0028] Figure 11 This is a diagram showing the backrest reclining at the third angle.

[0029] Figure 12 This is a diagram showing the backrest reclining at the fourth angle.

[0030] Figure 13 This is a schematic diagram of the driving component;

[0031] Figure 14 for Figure 13 Enlarged view of region A in the middle;

[0032] Figure 15 for Figure 13 Enlarged view of region B in the middle;

[0033] Figure 16 This is a schematic diagram of the rotating wheel;

[0034] Figure 17 for Figure 16 A schematic diagram of the rotating wheel from another angle;

[0035] Figure 18 This is a schematic diagram illustrating the movement principle of the adjusting block when the driving component includes a first rope and a second rope.

[0036] Reference numerals: 100-Seat, 101-Seat cushion, 102-Bracket, 103-Fixing box, 104-Drive component, 105-Chassis, 107-Backrest, 108-Connecting seat, 201-Transition component, 202-Mounting seat, 203-Adjusting block, 204-Knob, 301-Shaft, 302-Supporting block, 303-Cable management block, 304-Main body, 401-Protective cover, 402-Cable management channel, 403-Sliding channel, 404-Seventh mounting slot, 405-Eighth mounting slot, 501-Sixth mounting slot, 502-Fifth mounting slot, 503- Receiving cavity, 504-supporting surface, 508-wheel part, 509-shaft part, 510-rotating wheel, 511-anti-slip groove, 601-elastic element, 602-positioning element, 803-positioning groove, 1501-fourth connector, 1502-second rope, 1503-third connector, 1504-first rope, 1505-second connector, 1506-first connector, 1601-fourth mounting groove, 1602-third mounting groove, 1603-first mounting groove, 1604-second mounting groove, 1701-first rope body, 1702-second rope body. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below. Examples of these 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 the present invention, and should not be construed as limiting the present invention.

[0038] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0039] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0040] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0041] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] This invention provides a chassis mechanism. Figure 1 and Figure 2 The figure shows an adjustable backrest seat (hereinafter referred to as the seat, corresponding to reference numeral "100") with the chassis mechanism. The seat 100 includes a seat cushion 101, a backrest 107, and a chassis mechanism, wherein the chassis mechanism is used to realize the connection between the seat cushion 101 and the backrest 107 and the angle adjustment function between the two. (See reference...) Figure 1 The backrest 107 is located behind the seat cushion 101, and at least a portion of the backrest 107 is positioned above the seat cushion 101. The front side of the backrest 107 is designed to contact the user's back for support. Figures 1 to 4 The chassis mechanism includes a chassis 105, a connecting seat 108, and an adjustment component, wherein the adjustment component includes an adjustment block 203, a rotating wheel 510, a transition piece 201, and a driving piece 104.

[0043] The chassis 105 is used to connect with the seat cushion 101, for example, by combining Figure 1 and Figure 2 The chassis 105 is connected to the underside of the seat cushion 101. A connecting seat 108 is rotatably connected to the chassis 105 and is used to connect to the backrest 107. When the connecting seat 108 rotates relative to the chassis 105, the backrest 107 rotates relative to the seat cushion 101. For example, in combination... Figure 1 and Figure 2 In some embodiments, the chassis mechanism further includes a pivot 301, and the chassis 105 and the connecting seat 108 are both connected to the pivot 301. The connecting seat 108 is fixedly connected to the pivot 301, and the chassis 105 can rotate around the pivot 301. The end of the connecting seat 108 away from the pivot 301 is connected to the backrest 107.

[0044] The adjustment assembly includes an adjustment block 203, a rotating wheel 510, a transition piece 201, and a drive piece 104. For example... Figure 3 As shown, the chassis 105 has a sliding groove 403, and the adjusting block 203 is slidably disposed in the sliding groove 403; combined with Figure 3 , Figure 7 and Figure 8The driving component 104 surrounds the transition component 201 and the rotating wheel 510, and the adjusting block 203 is connected to the driving component 104 at both ends along its sliding direction. The installation positions of the rotating wheel 510 and the transition component 201 are relatively flexible. (Refer to...) Figure 2 In some embodiments, the chassis mechanism further includes a bracket 102 and a mounting box 103. The bracket 102 is mounted on the bottom of the seat cushion 101, the transition piece 201 can be mounted on the chassis 105, the mounting box 103 is mounted on the bracket 102, and the wheel 510 is mounted on the mounting box 103 (a portion of the wheel 510 is accommodated in the mounting box 103). Figure 2 (The rotating wheel 510 is not shown in the diagram). In other embodiments, it is also possible to mount both the rotating wheel 510 and the transition piece 201 on the chassis 105.

[0045] When the adjusting block 203 slides to different positions in the sliding groove 403, the angle between the connecting seat 108 and the chassis 105 changes, and correspondingly, the angle between the backrest 107 and the seat cushion 101 also changes. For example, refer to Figure 2 In some embodiments, the chassis mechanism further includes a support block 302, through which a rotating shaft 301 passes. The support block 302 is fixedly connected to the rotating shaft 301, and one end of the support block 302 can abut against an adjusting block 203. Figures 9 to 12 When the adjusting block 203 slides to different positions in the sliding groove 403, the angle between the connecting seat 108 and the chassis 105 changes when the abutting block 302 abuts against the adjusting block 203 at different positions.

[0046] Reference Figure 3 In some embodiments, the chassis 105 includes a main body 304 and a mounting base 202. The main body 304 is used to connect with the rotating shaft 301 and the seat cushion 101. The mounting base 202 protrudes from the bottom of the main body 304, and a sliding groove 403 is provided on the mounting base 202. The mounting base 202 can be fixed to the main body 304 with screws, or it can be integrally injection molded with the main body 304.

[0047] Reference Figure 7 , Figure 8 The movement of the adjusting block 203 is driven by the movement of the driving member 104, which in turn is driven by the rotation of the rotating wheel 510. The rotating wheel 510 can be rotated by the user's hand or by a driving component such as a motor. (See reference...) Figure 7 and Figure 8 The driving component 104 is connected to the adjusting block 203. The driving component 104 surrounds the rotating wheel 510 and the transition component 201. When the rotating wheel 510 rotates, the rotating wheel 510 pulls the driving component 104, thereby pulling the adjusting block 203 to slide along the sliding groove 403.

[0048] The drive component 104 can be specifically configured as a rope, belt, chain, etc. If the drive component 104 is configured as a belt, it can also be configured as a timing belt; if the drive component 104 is configured as a timing belt or chain, the outer periphery of the pulley 510 and the outer periphery of the transition component 201 need to have teeth for engaging with the timing belt or chain, and correspondingly, the transition component 201 needs to be rotatably connected to the chassis 105. Furthermore, when the drive component 104 is configured as a rope, the transition component 201 can be relatively stationary with respect to the chassis 105 (not rotating relative to the chassis 105), for example, the transition component 201 can be configured as a fixed shaft. Of course, the transition component 201 can also be configured to be rotatably connected to the chassis 105 to reduce the resistance encountered when the drive component 104 moves; for example, the drive component 104 can be configured as a roller, a shaft, etc.

[0049] For reference Figure 7 When the rotating wheel 510 rotates counterclockwise, the driving component 104 rotates counterclockwise as a whole, and the driving component 104 pulls the adjusting block 203 to move to the left; refer to Figure 8 When the rotating wheel 510 rotates clockwise, the driving component 104 rotates clockwise, and the driving component 104 pulls the adjusting block 203 to move to the right.

[0050] Since the drive member 104 surrounds the rotating wheel 510 and the transition member 201, regardless of whether the rotating wheel 510 rotates forward or backward, the drive member 104 can pull the adjusting block 203 to move, thereby changing the angle of the backrest 107. Therefore, the adjustable backrest seat of the present invention has high stability and accuracy in both forward and reverse adjustment of the backrest 107.

[0051] As mentioned above, in some embodiments, the abutment block 302 abuts against different parts of the adjusting block 203, thereby placing the backrest 107 at different reclining angles. Correspondingly, see [reference needed]. Figure 5 The adjusting block 203 has multiple abutment surfaces 504 on the side facing away from the chassis 105, and the multiple abutment surfaces 504 are distributed along the sliding direction of the adjusting block 203 (corresponding to...). Figure 5 Then it is distributed along the left and right direction), and, combined with Figure 2 , Figure 3 and Figure 5 Multiple abutment surfaces 504 are spaced apart along the rotation direction of the backrest 107 (or along the circumference of the pivot 301).

[0052] To ensure the stability of the reclining angle of the backrest 107 after adjustment, the position of the adjusting block 203 needs to be fixed after the position of the adjusting block 203 changes. For example, refer to... Figure 7 and Figure 8 In some embodiments, the chassis 105 has a plurality of positioning grooves 803, which are distributed along the sliding direction of the adjusting block 203; refer to Figure 6 The adjustment assembly includes a positioning element 602 and an elastic element 601. Both ends of the elastic element 601 are connected to the adjustment block 203 and the positioning element 602, respectively. When the adjustment block 203, positioning element 602, and elastic element 601 are assembled, the elastic element 601 is in a compressed state. The elastic force of the elastic element 601 drives the positioning element 602 to move away from the adjustment block 203, thereby causing the positioning element 602 to enter a positioning groove 803. Figures 6 to 8 When the positioning element 602 enters the positioning groove 803, the groove wall of the positioning groove 803 abuts against the positioning element 602, preventing the adjustment block 203 from sliding; this can fix the position of the adjustment block 203 and prevent the adjustment block 203 from shaking after the adjustment is completed, which would cause the backrest 107 to change its reclining angle.

[0053] When the reclining angle of the backrest 107 needs to be adjusted, the pulling force of the drive member 104 serves as the power to drive the positioning member 602 to disengage from the positioning groove 803. When the drive member 104 pulls the adjusting block 203, the wall of the positioning groove 803 presses against the positioning member 602, and the compression degree of the elastic member 601 gradually increases until the positioning member 602 disengages from the current positioning groove 803. Specifically, the elastic member 601 can be set as a spring, and the connection between the positioning member 602 and the elastic member 601 can be set as an abutment. The connection between the adjusting block 203 and the elastic member 601 can also be set as an abutment.

[0054] Reference Figure 7 and Figure 8 In order to appropriately reduce the resistance of the positioning member 602 disengaging from the positioning groove 803, the groove wall of the positioning groove 803 can be set as an arc surface, and the surface of the positioning member 602 that contacts the groove wall of the positioning groove 803 can be set as an arc surface.

[0055] In addition, in order to improve the structural compactness of seat 100, refer to Figure 5 and Figure 6 The adjusting block 203 may have a receiving cavity 503 inside, and the elastic member 601 is disposed in the receiving cavity 503. One end of the elastic member 601 is connected to the wall of the receiving cavity 503. A part of the positioning member 602 is accommodated in the receiving cavity 503 and connected to the other end of the elastic member 601. The other part of the positioning member 602 is exposed outside the receiving cavity 503. The part of the positioning member 602 exposed outside the receiving cavity 503 can be used to be inserted into the positioning groove 803.

[0056] Reference Figure 4 The rotating wheel 510 includes a wheel portion 508 and a shaft portion 509. One end of the shaft portion 509 along its own axial direction is connected to the wheel portion 508. The wheel portion 508 is disposed in a cavity inside the fixed box 103. A portion of the driving member 104 extends into the interior of the fixed box 103, and the wheel portion 508 is wound around the driving member 104. (See reference...) Figure 4A portion of the shaft 509 extends beyond the mounting box 103. If the wheel 510 rotates under the user's rotation, the user can directly grasp the exposed portion of the shaft 509 and rotate the wheel 510. Alternatively, to facilitate the user's rotation of the wheel 510, the seat 100 also includes a knob 204 for direct user contact. The knob 204 is fitted around the shaft 509 and can rotate synchronously with the shaft 509. The outer circumference of the knob 204 has multiple anti-slip grooves 511 to prevent the user's fingers from slipping on the knob 204. If the wheel 510 rotates under the drive of a motor, the exposed portion of the shaft 509 can be connected to the motor via a coupling.

[0057] The following section will describe in detail the connection relationship between the drive component 104 and other components when the drive component 104 is configured as a rope.

[0058] Reference Figure 7 and Figure 8 In some embodiments, the drive member 104 surrounding the wheel 510 and the transition member 201 can be equivalent to a rope simultaneously surrounding both the wheel 510 and the transition member 201. The two ends of the adjusting block 203 along its sliding direction are respectively connected to the two ends of this rope. In this configuration, to prevent the drive member 104 from slipping and affecting the adjustment of the backrest 107, the material between the drive member 104 and the wheel 510 needs to be appropriately selected to avoid excessive friction between them.

[0059] Combination Figures 13 to 15 In other embodiments, the drive member 104 includes a first rope 1701 and a second rope 1702 that are separately disposed from each other. The two ends of the first rope 1701 are connected to the rotating wheel 510 and the adjusting block 203, respectively, and the two ends of the second rope 1702 are also connected to the rotating wheel 510 and the adjusting block 203, respectively. A portion of the first rope 1701 wraps around the outer periphery of the transition member 201, and portions of both the first rope 1701 and the second rope 1702 wrap around the outer periphery of the rotating wheel 510 (more specifically, around the outer periphery of the wheel portion 508), with the first rope 1701 and the second rope 1702 wrapping around the rotating wheel 510 in opposite directions. Figure 13 For example, the left part of the first rope 1701 surrounds the transition piece 201, and the right part of the first rope 1701 and the right part of the second rope 1702 surround the rotating wheel 510. Combined with... Figure 18 The first rope 1701 can rotate counterclockwise around the wheel 510, and the second rope 1702 can rotate clockwise around the wheel 510.

[0060] by Figure 18For example, when the wheel 510 rotates counterclockwise, the length of the first rope 1701 around the outer circumference of the wheel 510 increases, while the length of the second rope 1702 around the outer circumference of the wheel 510 decreases. The adjusting block 203 is pulled to the left by the first rope 1701. Conversely, when the wheel 510 rotates clockwise, the length of the second rope 1702 around the outer circumference of the wheel 510 increases, while the length of the first rope 1701 around the outer circumference of the wheel 510 decreases. The adjusting block 203 is pulled to the right by the second rope 1702.

[0061] Reference Figure 15 The first rope body 1701 may include a first rope 1504 and a first connector 1506, and the second rope body 1702 may include a second rope 1502 and a second connector 1505. (See reference...) Figure 16 and Figure 17 The rotating wheel 510 has a first mounting groove 1603 and a second mounting groove 1604. A first connector 1506 is disposed in the first mounting groove 1603, and a second connector 1505 is disposed in the second mounting groove 1604.

[0062] When the wheel 510 rotates, the wall of the first mounting groove 1603 abuts against the first connector 1506, which can rotate synchronously with the wheel 510, thereby moving the first rope 1504. Similarly, when the wheel 510 rotates, the wall of the second mounting groove 1604 abuts against the second connector 1505, which can rotate synchronously with the wheel 510, thereby moving the second rope 1502. In this configuration, the movement of the drive member 104 does not depend on the friction between the drive member 104 and the wheel 510, and the drive member 104 is less prone to slippage during movement, which helps to improve the smoothness of adjusting the reclining angle of the backrest 107.

[0063] Reference Figure 16 and Figure 17 To prevent the first rope 1504 and the second rope 1502 from moving axially along the pulley 510 and disengaging from the pulley 510, in some embodiments, the outer periphery of the pulley 510 has a third mounting groove 1602 and a fourth mounting groove 1601. (Refer to...) Figure 16 and Figure 17The third mounting groove 1602 and the fourth mounting groove 1601 are both arranged circumferentially along the pulley 510. The third mounting groove 1602 communicates with the first mounting groove 1603, and the second mounting groove 1604 communicates with the fourth mounting groove 1601. The third mounting groove 1602 is used to accommodate a portion of the first rope 1504, and the fourth mounting groove 1601 is used to accommodate a portion of the second rope 1502. The groove wall of the third mounting groove 1602 can prevent the first rope 1504 from moving axially along the pulley 510, and the groove wall of the fourth mounting groove 1601 can prevent the second rope 1502 from moving axially along the pulley 510. Therefore, providing the third mounting groove 1602 and the fourth mounting groove 1601 can prevent the first rope 1504 and the second rope 1502 from detaching from the pulley 510.

[0064] In some embodiments, in order for the adjusting block 203 to move synchronously with the first rope 1701 or the second rope 1702, refer to Figure 14 The first rope 1701 also includes a third connector 1503, and the second rope 1702 also includes a fourth connector 1501, as shown in the reference. Figure 5 The adjusting block 203 has a fifth mounting groove 502 and a sixth mounting groove 501 at its two ends along its sliding direction.

[0065] Combination Figures 13 to 15 The third connector 1503 is connected to the end of the first rope 1504 furthest from the pulley 510, meaning the first connector 1506 and the third connector 1503 are respectively located at both ends of the first rope 1504. Combined with... Figure 5 , Figure 7 and Figure 8 The third connector 1503 is disposed in the fifth mounting groove 502, and the groove wall of the fifth mounting groove 502 can abut against the third connector 1503.

[0066] Combination Figures 13 to 15 The fourth connector 1501 is connected to the end of the second rope 1502 furthest from the pulley 510, meaning the second connector 1505 and the fourth connector 1501 are respectively located at both ends of the second rope 1502. Combined with... Figure 5 , Figure 7 and Figure 8 The fourth connector 1501 is disposed in the sixth mounting groove 501, and the groove wall of the sixth mounting groove 501 can abut against the fourth connector 1501.

[0067] Reference Figure 18When the wheel 510 rotates and the length of the first rope 1504 wrapped around the wheel 510 increases, the third connector 1503 moves away from the wheel 510. The third connector 1503 abuts against the left end wall of the fifth mounting groove 502, and the force exerted by the third connector 1503 on the adjusting block 203 drives the adjusting block 203 to move to the left. Correspondingly, at this time, the right end wall of the sixth mounting groove 501 abuts against the fourth connector 1501, and the force exerted by the adjusting block 203 on the fourth connector 1501 drives the second rope 1502 to move, reducing the length of the second rope 1502 wrapped around the wheel 510.

[0068] Similarly, when the wheel 510 rotates and the length of the second rope 1502 wrapped around the wheel 510 increases (at this time) Figure 18 (The rotating wheel 510 should rotate clockwise), the fourth connector 1501 moves toward the rotating wheel 510, the fourth connector 1501 abuts against the right end wall of the sixth mounting groove 501, and the force applied by the fourth connector 1501 to the adjusting block 203 drives the adjusting block 203 to move to the right; correspondingly, at this time, the left end wall of the fifth mounting groove 502 abuts against the third connector 1503, and the force applied by the adjusting block 203 to the third connector 1503 drives the first rope 1504 to move, reducing the length of the first rope 1504 wrapped around the rotating wheel 510.

[0069] Reference Figure 3 In some embodiments, along the sliding direction of the adjusting block 203, the two ends of the mounting base 202 also have a seventh mounting groove 404 and an eighth mounting groove 405, respectively, both of which are connected to the sliding groove 403. A portion of the first rope 1504 can be disposed in the seventh mounting groove 404, and a portion of the second rope 1502 can be disposed in the eighth mounting groove 405. The seventh mounting groove 404 is used to position the first rope 1504, facilitating its arrangement, and the eighth mounting groove 405 is used to position the second rope 1502, facilitating its arrangement.

[0070] To facilitate the constraint of the position and orientation of the drive component 104, the chassis 105 may also have a cable management groove 402 for accommodating the drive component 104. For example, see reference Figure 3 The chassis 105 includes a cable management block 303, which protrudes from the lower side of the main body 304 and has a cable management groove 402. Multiple cable management blocks 303 can be provided, and each cable management block 303 can have only one or two cable management grooves 402.

[0071] Reference Figure 3The chassis mechanism may also include a protective sleeve 401. The protective sleeve 401 is fitted over a portion of the drive member 104 and is stationary relative to the chassis 105 (meaning that the protective sleeve 401 does not move with the drive member 104 when it moves), while the drive member 104 can move inside the protective sleeve 401. For example, two protective sleeves 401 may be provided, one of which is fitted over the first rope 1504. One end of this protective sleeve 401 abuts against the mounting base 202, and the other end abuts against the outer surface of the fixing box 103. When the first rope 1504 moves, although the frictional force exerted by the first rope 1504 on the protective sleeve 401 tends to drive the protective sleeve 401 to move, the mounting base 202 and the fixing box 103 abut against both ends of the protective sleeve 401, thereby hindering the movement of the protective sleeve 401. Another protective sleeve 401 is fitted over the outside of the second rope 1502. One end of the protective sleeve 401 abuts against the cable management block 303, and the other end abuts against the outer surface of the fixing box 103. The fixing box 103 and the cable management block 303 abut against the two ends of the protective sleeve 401 respectively, thereby preventing the protective sleeve 401 from moving with the second rope 1502.

[0072] Without the protective cover 401, the moving drive component 104 is prone to getting tangled in nearby objects (such as the hem of a user's clothing), which could prevent it from moving smoothly and affect the angle adjustment of the backrest 107. With the protective cover 401, the moving drive component 104 moves within the protective cover 401, while the protective cover 401, which is fitted over the moving drive component 104, remains stationary, preventing it from getting tangled in nearby objects. In other words, with the protective cover 401, the drive component 104 is less likely to get tangled and unable to move, its movement is less obstructed, and the angle adjustment of the backrest 107 is smoother.

[0073] Additionally, it should be noted that since the sliding groove 403, cable management groove 402, fifth mounting groove 502, sixth mounting groove 501, seventh mounting groove 404 and eighth mounting groove 405 mentioned above have downward openings, baffles can be installed to cover the bottom of the grooves to prevent the components inside the grooves from falling out.

[0074] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A chassis mechanism, characterized in that, include: A chassis for connection with a seat cushion, the chassis having a sliding groove; A connecting seat for connecting to the backrest, the connecting seat being rotatably connected to the chassis; An adjustment assembly includes an adjustment block, a rotating wheel, a transition member, and a driving member. The adjustment block is slidably disposed in the sliding groove. The driving member surrounds the rotating wheel and the transition member. Both ends of the adjustment block along its sliding direction are connected to the driving member. The side of the adjustment block facing away from the chassis has multiple abutment surfaces, which are distributed along the sliding direction of the adjustment block and spaced apart along the rotation direction of the connecting seat. A retaining block is fixed relative to the connecting seat, and one end of the retaining block can abut against one of the retaining surfaces to prevent the connecting seat from rotating relative to the chassis; The rotating wheel can rotate relative to the chassis to pull the drive member, thereby causing the adjusting block to slide along the sliding groove. The sliding of the adjusting block can change the abutting surface that abuts against the abutting block, thereby changing the angle of the chassis relative to the connecting seat.

2. The chassis mechanism according to claim 1, characterized in that, The chassis has multiple positioning grooves, which are distributed along the sliding direction of the adjusting block. The adjusting assembly also includes a positioning element and an elastic element, with both ends of the elastic element connected to the adjusting block and the positioning element, respectively. The elastic force of the elastic element is used to drive the positioning element away from the adjusting block and to make the positioning element enter the positioning groove. The groove wall of the positioning groove can abut against the positioning element to prevent the adjusting block from sliding.

3. The chassis mechanism according to claim 2, characterized in that, The adjusting block has a receiving cavity, the elastic element is received in the receiving cavity, a part of the positioning element is disposed in the receiving cavity, and the end of the elastic element away from the positioning element is connected to the wall of the receiving cavity.

4. The chassis mechanism according to claim 1, characterized in that, The driving component includes: The first rope is connected at both ends to the rotating wheel and the adjusting block, respectively. The second rope is separate from the first rope. The two ends of the second rope are respectively connected to the wheel and the adjusting block, and the two ends of the adjusting block along its own sliding direction are respectively connected to the first rope and the second rope. A portion of the first rope surrounds the transition member, and a portion of the first rope and a portion of the second rope surround the reel, with the direction of the first rope surrounding the reel being opposite to the direction of the second rope surrounding the reel.

5. The chassis mechanism according to claim 4, characterized in that, The first rope includes a first rope and a first connector, the first connector being connected to the end of the first rope near the spool; the second rope includes a second rope and a second connector, the second connector being connected to the end of the second rope near the spool; the first rope and the second rope surround the spool. The rotating wheel has a first mounting groove and a second mounting groove. The first connector is accommodated in the first mounting groove, and the second connector is accommodated in the second mounting groove. The groove wall of the first mounting groove can abut against the first connector so that the first connector can rotate synchronously with the rotating wheel. The groove wall of the second mounting groove can abut against the second connector so that the second connector can rotate synchronously with the rotating wheel.

6. The chassis mechanism according to claim 5, characterized in that, The outer periphery of the wheel has a third mounting groove and a fourth mounting groove, the third mounting groove is connected to the first mounting groove, and the fourth mounting groove is connected to the second mounting groove; Both the third mounting slot and the fourth mounting slot are arranged along the circumference of the reel. The third mounting slot accommodates the first rope, and the fourth mounting slot accommodates the second rope.

7. The chassis mechanism according to claim 5, characterized in that, Along the sliding direction of the adjusting block, the two ends of the adjusting block respectively have a fifth mounting groove and a sixth mounting groove; The first rope also includes a third connector, which is connected to the end of the first rope away from the wheel. The third connector is accommodated in the fifth mounting groove, and the groove wall of the fifth mounting groove can abut against the third connector so that the first rope pulls the adjusting block to move. The second rope also includes a fourth connector, which is connected to the end of the second rope away from the wheel. The fourth connector is accommodated in the sixth mounting groove, and the groove wall of the sixth mounting groove can abut against the fourth connector so that the second rope pulls the adjusting block to move.

8. The chassis mechanism according to claim 1, characterized in that, The chassis has cable management grooves, and a portion of the drive unit is disposed in the cable management grooves.

9. An adjustable backrest seat, characterized in that, include: Chassis mechanism as described in any one of claims 1 to 8; The seat cushion is connected to the chassis; The backrest is connected to the connecting seat.

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