Backrest linkage chassis and seat
By designing a backrest linkage chassis, the coordinated adjustment of the seat back and seat cushion is achieved through linkage mechanism and elastic components, solving the problem that the existing seat back and seat cushion cannot be adjusted in sync, thus improving user comfort and adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN SIHOO INTELLIGENT FURNITURE CO LTD
- Filing Date
- 2026-03-04
- Publication Date
- 2026-04-14
AI Technical Summary
The backrest and seat cushion of the existing seats cannot be adjusted in tandem, resulting in insufficient user comfort.
Design a backrest linkage chassis that connects the backrest connection mechanism and the seat cushion connection mechanism through a linkage mechanism to achieve coordinated movement of the backrest and the seat cushion. The chassis includes a base, a backrest connection mechanism, a first linkage part, and a linkage mechanism. Power is transmitted through an elastic component, so that the power of the backrest is transmitted to the seat cushion connection mechanism to achieve coordinated adjustment of the seat backrest and the seat cushion.
By coordinating the adjustment of the backrest and seat cushion, the user experience is improved, adapting to the needs of users with different body types and postures, and enhancing the comfort and flexibility of the seat.
Smart Images
Figure CN121845367A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of seating technology, and more specifically, to a backrest linkage chassis and a seat. Background Technology
[0002] Seats are a type of equipment used daily. To meet user needs, seat backs can recline, seat height can be adjusted, and so on. However, the inventors discovered that in existing technologies, the adjustments of the seat back and seat cushion often cannot be coordinated, and adjusting the position of the seat back or seat cushion alone cannot meet the user's comfort requirements.
[0003] The content of the background section is merely technology known to the public and does not necessarily represent existing technology in the field. Summary of the Invention
[0004] This application aims to provide a backrest linkage chassis and seat to solve at least one of the above-mentioned technical problems.
[0005] According to an embodiment of this application, a backrest linkage chassis is provided. The backrest linkage chassis includes a base, a backrest connecting mechanism, a first linkage part, and a linkage mechanism; wherein, the base includes a base plate, two support plates, and a connecting shaft, the two support plates are disposed opposite to each other on the base plate and are a certain distance apart, and the connecting shaft is disposed between the two support plates; the first end of the backrest connecting mechanism is connected to the backrest, and the second end is rotatably connected to the base; the first linkage part is fixedly disposed at the second end of the backrest connecting mechanism; the linkage mechanism is disposed between the two support plates, and the linkage mechanism includes a second linkage part and an elastic component; the second linkage part is rotatably connected to the base, engages with the first linkage part, and is also movably connected to a seat cushion connecting mechanism; the elastic component is rotatably connected to the second linkage part; wherein, when the backrest connecting mechanism is rotated under the action of a force, the first linkage part can drive the second linkage part to rotate, and then the second linkage part drives the seat cushion connecting mechanism to move in the horizontal direction.
[0006] According to the technical solution of this application, the linkage mechanism is rotatably connected to the backrest connecting mechanism and the seat cushion connecting mechanism, respectively, and can transmit the power of the backrest connecting mechanism to the seat cushion connecting mechanism. With this solution, when a user sits in the seat and leans back, the backrest experiences a downward force, which is transmitted to the backrest connecting mechanism. The backrest connecting mechanism rotates under this downward force, causing the first linkage part, which is fixedly connected to the second end of the backrest connecting mechanism, to rotate along with the rotation of the backrest connecting mechanism, and in turn, drives the second linkage part to rotate. Therefore, the second linkage part can drive the seat cushion connecting mechanism and the seat cushion connected above the seat cushion connecting mechanism to move horizontally, achieving coordinated movement of the seat back and seat cushion, and improving the user experience.
[0007] According to some embodiments of this application, the backrest connection mechanism has two oppositely arranged sidewalls, one of which is provided with a plurality of gear holes, and the other is provided with a protruding structure; there are two second linkage parts, which are arranged opposite to each other, and a gear adjustment member is passed through between the two second linkage parts; one end of the gear adjustment member is slidably connected to the protruding structure, and the other end of the gear adjustment member can be inserted into any one of the plurality of gear holes.
[0008] According to some embodiments of this application, the gear adjusting component includes a sliding rod, a sliding sleeve, a first elastic member, and a second elastic member; wherein, the sliding rod passes through two second linkage portions; the sliding sleeve is sleeved on the outer side of the middle portion of the sliding rod and is capable of sliding relative to the sliding rod; the first elastic member is sleeved on a portion of the outer side of the sliding rod and is disposed near one of the two second linkage portions; the second elastic member is sleeved on a portion of the outer side of the sliding rod, with one end disposed near the other of the two second linkage portions and the other end abutting against the sliding sleeve; a stop member is disposed between the first elastic member and the sliding sleeve and is connected to the sliding rod.
[0009] According to some embodiments of this application, a sliding sleeve is connected to a control rod, which can drive the sliding sleeve to move along the extension direction of the sliding rod; wherein, the control rod is subjected to a force that drives the sliding sleeve to move in a direction away from the middle of the sliding rod, the sliding sleeve compresses the second elastic member, and the second elastic member changes from an extended state to a compressed state; and the force that compresses the first elastic member is released, the first elastic member changes from a compressed state to an extended state, the first elastic member pushes the stop member and the sliding rod connected to the stop member to move, and the sliding rod exits from the stop hole.
[0010] According to some embodiments of this application, a first clearance groove is provided on the second linkage part, and the first clearance groove can accommodate the sliding rod.
[0011] According to some embodiments of this application, the elastic component includes a third elastic element, an elastic adjustment seat, an adjustment tooth, an adjustment worm, and an adjustment handle; wherein, the third elastic element is rotatably connected to the second linkage part and also rotatably connected to the base; the elastic adjustment seat abuts against one end of the third elastic element and is relatively stationary relative to the third elastic element; the adjustment tooth is connected to the end of the elastic adjustment seat away from the third elastic element; one end of the adjustment worm is meshed with the adjustment tooth; the adjustment handle is connected to the other end of the adjustment worm; wherein, rotating the adjustment handle can cause the adjustment worm to drive the adjustment tooth to rotate, the elastic adjustment seat and the adjustment tooth to rotate relative to each other, and thus the elastic adjustment seat can move in the extension direction of the third elastic element, so as to stretch or compress the third elastic element.
[0012] According to some embodiments of this application, the elastic component further includes a guide rod; the guide rod passes through the adjusting tooth and the elastic adjustment seat in sequence along the extension direction of the third elastic member, and at least a portion of its structure extends into the interior of the third elastic member.
[0013] According to some embodiments of this application, the elastic component further includes a connecting rod; one end of the connecting rod is rotatably connected to the base, and the other end is rotatably connected to the cushion connecting mechanism.
[0014] According to some embodiments of this application, the end of the third elastic member near the connecting rod is rotatably connected to the base via a connecting shaft; the connecting rod is provided with a second clearance groove, which can accommodate the connecting shaft.
[0015] According to another embodiment of this application, a seat is also provided. The seat includes a backrest and a backrest linkage chassis as described above; the backrest is connected to a backrest connection mechanism.
[0016] According to the technical solution of this application, the backrest is connected to the backrest connecting mechanism. This solution enables coordinated movement of the seat backrest, the seat cushion connecting mechanism, and the seat cushion connected above the seat cushion connecting mechanism, thus improving the user experience. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This diagram shows a structural schematic of a seat according to an embodiment of the present application; Figure 2 A schematic diagram of the internal structure of a backrest linkage chassis according to an embodiment of this application is shown; Figure 3 This diagram shows a structural schematic of a linkage mechanism according to an embodiment of the present application; Figure 4 A schematic diagram of the structure of a base according to an embodiment of this application is shown; Figure 5 A schematic diagram of the structure of an elastic component according to an embodiment of this application is shown; Figure 6 This diagram shows a structural schematic of a backrest connection mechanism according to an embodiment of the present application; Figure 7 A schematic diagram of the gear adjustment component according to an embodiment of this application is shown.
[0019] Explanation of reference numerals in the attached figures: 1. Base; 11. Base plate; 12. Support plate; 13. Connecting shaft; 2. Backrest connecting mechanism; 21. First end; 22. Second end; 23. Side wall; 231. Stop hole; 232. Protruding structure; 3. First linkage unit; 4. Linkage mechanism; 41. Elastic component; 411. Elastic adjustment seat; 412. Adjustment gear; 413. Third elastic element; 414. Adjustment worm; 415. Adjustment handle; 416. Guide rod; 417. Connecting rod; 4171. Second clearance groove; 42. Second linkage part; 421. First clearance groove; 5. Seat cushion connecting mechanism; 6. Gear adjustment component; 61. First elastic component; 62. Second elastic component; 63. Sliding rod; 64. Sliding sleeve; 65. Stop component; 66. Control rod; 7. Backrest. Detailed Implementation
[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.
[0021] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of these specific details, or other methods, components, materials, devices, etc. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.
[0022] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.
[0023] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order.
[0024] In this embodiment, linkage refers to the connection of two or more components to achieve coordinated movement or action; that is, when one component or structure moves, one or more other components or structures also move accordingly. Preload refers to the force applied to a spring before it bears any working load. Elastic modulus is a physical quantity relating the elastic deformation of an object to the external force it is subjected to. A larger elastic modulus means the object is less prone to deformation; a smaller elastic modulus means the object is more prone to deformation.
[0025] In existing technologies, the backrest and seat cushion of a seat can often only be adjusted individually and not in conjunction. For example, the backrest can be adjusted to recline or tilt forward independently, while the seat cushion can be adjusted to move forward or backward independently.
[0026] To address this issue, this application provides a backrest linkage chassis and a seat equipped with the backrest linkage chassis. According to an embodiment of this application, the linkage mechanism is movably connected to both the backrest connecting mechanism and the seat cushion connecting mechanism. This enables coordinated movement between the backrest connecting mechanism and the seat cushion connecting mechanism, thereby achieving coordinated movement between the backrest and the seat cushion. This technical solution solves the problem in the prior art where the backrest and seat cushion of a seat can only be adjusted individually and not in a coordinated manner.
[0027] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0028] Please refer to the above. Figures 1 to 4 , Figure 1 A structural schematic diagram of a seat according to an embodiment of this application is shown; Figure 2 A schematic diagram of the internal structure of a backrest linkage chassis according to an embodiment of this application is shown; Figure 3 A schematic diagram of the linkage mechanism according to an embodiment of this application is shown; Figure 4 A schematic diagram of the structure of a base according to an embodiment of this application is shown.
[0029] According to an example embodiment, this application provides a backrest linkage chassis. The backrest linkage chassis includes a base 1, a backrest connecting mechanism 2, a first linkage part 3, and a linkage mechanism 4.
[0030] The base 1 serves to support or mount other components. In the embodiments of this application, the base 1 is used to support and mount the backrest 7, the backrest connecting mechanism 2, the first linkage part 3, and the linkage mechanism 4.
[0031] Specifically, the base 1 includes a base plate 11, two support plates 12, and a connecting shaft 13. The two support plates 12 are disposed opposite each other on the base plate 11 and are spaced a certain distance apart; the connecting shaft 13 is disposed between the two support plates 12 and is used to connect other structures or components. In the embodiments of this application, the two support plates 12 are disposed opposite each other on the base plate 11, including but not limited to the following implementation methods.
[0032] In the first embodiment, two support plates 12 are disposed opposite to and perpendicular to the base plate 11.
[0033] In the second embodiment, two support plates 12 are disposed opposite to each other on the base plate 11, and the distance between the two support plates 12 decreases in the vertical upward direction, so that the two support plates 12, the base plate 11 and the cushion connecting mechanism 5 together form a frame with a trapezoidal cross section, which has better stability than a frame with a rectangular cross section.
[0034] In the third embodiment, two support plates 12 are disposed opposite to each other on the base plate 11, and the distance between the two support plates 12 increases in the vertical upward direction, so that the two support plates 12, the base plate 11 and the cushion connecting mechanism 5 together form a frame with a trapezoidal cross section, which has better stability than a frame with a rectangular cross section.
[0035] In addition, the backrest connecting mechanism 2 has a first end 21 and a second end 22. Specifically, the first end 21 is connected to the backrest 7, and the second end 22 is rotatably connected to the base 1. The backrest 7 serves to support the back of a person sitting on the seat.
[0036] In the embodiments of this application, the function of the first linkage part 3 is to achieve linkage with other components or structures. The first linkage part 3 only needs to be able to achieve linkage with other structures or components; the specific structure is not limited in the embodiments of this application. For example, the first linkage part 3 can be a circular gear, a sector gear, a linkage rod, a toothed linkage rod, etc. In the embodiments of this application, a toothed linkage rod is used as an example for illustration.
[0037] Specifically, the first linkage part 3 is fixedly installed at the second end 22 of the backrest connecting mechanism 2, and can rotate with the rotation of the backrest connecting mechanism 2.
[0038] refer to Figure 5 , Figure 5 A schematic diagram of the structure of an elastic component according to an embodiment of this application is shown.
[0039] In the embodiments of this application, the linkage mechanism 4 functions to enable two or more components or structures to move or act in a coordinated manner.
[0040] Specifically, the linkage mechanism 4 is disposed between the two support plates 12, and the linkage mechanism 4 includes a second linkage part 42 and an elastic component 41.
[0041] The second linkage part 42 can be linked with other structures or components, and the specific structure is not limited in the embodiments of this application. For example, the second linkage part 42 can be a circular gear, a sector gear, a linkage rod, a toothed linkage rod, etc. In the embodiments of this application, the specific structure of the second linkage part 42 is described as a toothed linkage rod.
[0042] Specifically, the second linkage part 42 is rotatably connected to the base 1; the second linkage part 42 is engaged with the first linkage part 3; the second linkage part 42 is also movably connected to the cushion connecting mechanism 5 to realize the linkage between the first linkage part 3 and the cushion connecting mechanism 5. There are various ways for the second linkage part 42 to be rotatably connected to the base 1, such as: the second linkage part 42 is rotatably connected to the base plate 11 of the base 1 via a shaft, or the second linkage part 42 is rotatably connected to the support plate 12 of the base 1 via a connecting shaft 13. In this embodiment, the example of the second linkage part 42 being rotatably connected to the support plate 12 of the base 1 via a connecting shaft 13 is used for illustration.
[0043] Furthermore, the elastic component 41 is rotatably connected to the second linkage part 42. Specifically, the elastic component 41 and the second linkage part 42 are rotatably connected via a shaft.
[0044] During the operation of the backrest linkage chassis, when the backrest connecting mechanism 2 is rotated by the force, the first linkage part 3 can drive the second linkage part 42 to rotate, and then the second linkage part 42 drives the seat cushion connecting mechanism 5 to move in the horizontal direction.
[0045] In the above embodiments of this application, the second linkage part 42 in the linkage mechanism 4 is connected to the seat cushion connecting mechanism 5. The second linkage part 42 in the linkage mechanism 4 is also connected to the first linkage part 3, which is fixedly connected to the second end 22 of the backrest connecting mechanism 2. Therefore, when a user sits on the seat and leans back, causing the backrest to be subjected to a downward force, this downward force can be transmitted to the backrest connecting mechanism 2. The backrest connecting mechanism 2 rotates under the downward force, and the first linkage part 3, which is fixedly connected to the second end 22 of the backrest connecting mechanism 2, rotates along with the rotation of the backrest connecting mechanism 2. Since the first linkage part 3 and the second linkage part 42 are engaged, the first linkage part 3 can drive the second linkage part 42 to rotate, and the second linkage part 42 can drive the seat cushion connecting mechanism 5 and the seat cushion connected above the seat cushion connecting mechanism 5 to move horizontally, realizing the coordinated movement of the seat backrest 7 and the seat cushion, and improving the user experience.
[0046] Please refer to the above. Figure 6 and Figure 7 , Figure 6 A schematic diagram of the backrest connection mechanism according to an embodiment of this application is shown; Figure 7 A schematic diagram of the gear adjustment component according to an embodiment of this application is shown.
[0047] In the embodiments of this application, the backrest connection mechanism 2 has two oppositely arranged sidewalls 23. One of the two sidewalls 23 is provided with a plurality of stop holes 231, and the other is provided with a protruding structure 232.
[0048] The multiple gear shift holes 231 allow other structures to be inserted into different gear shift holes 231, thereby adjusting the other structures to different gear positions. In this embodiment, multiple gear shift holes 231 specifically refer to two or more gear shift holes 231, such as two, three, four, five, or six gear shift holes 231. This embodiment uses three gear shift holes 231 as an example for illustration.
[0049] The stop hole 231 can allow other structures to be inserted into or withdrawn from the hole structure, and its specific shape is not limited in the embodiments of this application. For example, the stop hole 231 can be a rectangular hole, a circular hole, an elliptical hole, a diamond-shaped hole, etc. In the embodiments of this application, a rectangular hole is used as an example for illustration.
[0050] Furthermore, there are two second linkage parts 42, which are arranged opposite to each other, and a gear adjustment member 6 passes through the two second linkage parts 42. In this embodiment of the application, the gear adjustment member 6 specifically refers to a component that can realize gear positioning or gear switching function.
[0051] Specifically, one end of the gear adjustment member 6 is slidably connected to the protruding structure 232, and the other end of the gear adjustment member 6 can be inserted into any one of the multiple gear holes 231.
[0052] In existing technology, the backrest and seat cushion of a chair cannot move in tandem or be adjusted to different positions. As a result, the chair can only make users of a certain height and body type relatively comfortable in a specific posture. If the user's body type deviates from the design standard of the chair or the usage scenario changes from office to rest, the user will experience discomfort when sitting in the chair because the user's body type or posture is not compatible with the design standard of the chair.
[0053] In the above embodiments of this application, by providing a gear adjustment member 6, the gear adjustment member 6 can be inserted into any one of the multiple gear holes 231 during the downward pressing process of the seat back 7. This achieves multiple fixed height positions for the seat back 7 during the downward pressing process. Since the seat back 7 and the seat cushion connecting mechanism 5 under the seat cushion move in coordination, the seat cushion connecting mechanism 5 and the seat cushion also have multiple fixed horizontal positions during horizontal movement. This allows the user to adjust different reclining angles and move the seat cushion forward different distances to accommodate users of different body types and different postures while sitting in the seat.
[0054] In the embodiments of this application, the gear adjustment member 6 includes a sliding rod 63, a sliding sleeve 64, a first elastic member 61, a second elastic member 62, and a stop member 65.
[0055] Among them, the sliding rod 63 passes through two second linkage parts 42.
[0056] The sliding sleeve 64 is fitted onto the outer side of the middle portion of the sliding rod 63. Specifically, in this embodiment, the sliding sleeve 64 being fitted onto the outer side of the middle portion of the sliding rod 63 means that it is positioned at any point between the two ends of the sliding rod 63.
[0057] The sliding sleeve 64 is capable of sliding relative to the sliding rod 63. Specifically, the sliding sleeve 64 slides relative to the sliding rod 63 along the extension direction of the sliding rod 63.
[0058] Furthermore, the first elastic element 61 only needs to have the ability to elastically deform; the specific structure is not limited in the embodiments of this application. For example, the first elastic element 61 can be a spring, a rubber sleeve, etc. In the embodiments of this application, a spring is used as an example for illustration.
[0059] Specifically, the first elastic element 61 is sleeved on part of the outer side of the sliding rod 63 and is located close to one of the two second linkage parts 42.
[0060] Furthermore, the length of the first elastic member 61 along the extension direction of the sliding rod 63 is less than the length of the sliding rod 63 along its own direction, and the first elastic member 61 is sleeved on the end of the sliding rod 63 near one of the two second linkage parts 42.
[0061] The second elastic element 62 only needs to have the ability to elastically deform; the specific structure is not limited in the embodiments of this application. For example, the second elastic element 62 can be a spring, a rubber sleeve, etc. In the embodiments of this application, a spring is used as an example for the specific structure of the second elastic element 62.
[0062] Specifically, the second elastic element 62 is sleeved on a portion of the outer side of the sliding rod 63, with one end positioned close to the other of the two second linkage parts 42, and the other end abutting against the sliding sleeve 63. Alternatively, the second elastic element 62 can directly abut against the end of the sliding sleeve 63, or a baffle or stop can be provided on the sliding sleeve 63, with the second elastic element 62 abutting against the baffle or stop.
[0063] Furthermore, the length of the second elastic member 62 along the extending direction of the sliding rod 63 is less than the length of the sliding rod 63 along its own direction, and the second elastic member 62 is sleeved on the end of the sliding rod 63 near the other of the two second linkage parts 42. The other end of the second elastic member 62 abuts against the sliding sleeve 63.
[0064] The stop 65 is disposed between the first elastic member 61 and the sliding sleeve 64, and is connected to the sliding rod 63. The stop 65 and the sliding rod 63 can be connected in various ways, such as threaded connection, snap-fit, or welding. The appropriate connection method can be selected as needed.
[0065] In the embodiments of this application, the sliding sleeve 64 is connected to a control rod 66. The control rod 66 can drive the sliding sleeve 64 to move along the extension direction of the sliding rod 63.
[0066] During the operation of the gear shifting component 6, the control lever 66 is driven by a force to move the sliding sleeve 64 away from the center of the sliding rod 63. The sliding sleeve 64 compresses the second elastic element 62, causing the second elastic element 62 to change from an extended state to a compressed state. Simultaneously, the force compressing the first elastic element 61 is released, causing the first elastic element 61 to change from a compressed state to an extended state. The first elastic element 61 pushes the stop 65 and the sliding rod 63 connected to the stop 65 to move, causing the sliding rod 63 to retract from the gear shift hole 231.
[0067] When the force acting on the control lever 66 is released, the second elastic element 62 changes from a compressed state to an extended state. The second elastic element 62 presses the sliding sleeve 64 and the stop 65 and moves them closer to the first elastic element 61. Since the stop 65 is connected to the sliding rod 63 and is located between the first elastic element 61 and the sliding sleeve 64, the first elastic element 61 changes from an extended state to a compressed state after being pressed by the stop 65, and the sliding rod 63 is inserted into any one of the multiple gear holes 231.
[0068] It should be noted that the elastic coefficient of the second elastic element 62 is greater than that of the first elastic element 61.
[0069] In the above embodiments, by setting the specific structure of the gear adjustment component 6 to include a sliding rod 63, a sliding sleeve 64, a first elastic element 61, a second elastic element 62, a stop element 65, and a control rod 66, the sliding rod 63 in the gear adjustment component 6 can be inserted into any one of the multiple gear holes 231, and can also be withdrawn from the gear hole 231, realizing the function of changing gears of the gear adjustment component 6, improving the user experience, and being able to adapt to users of different body types and different postures of users sitting in the seat.
[0070] In the embodiments of this application, a first clearance groove 421 is provided on the second linkage part 42, and the first clearance groove 421 can accommodate the sliding rod 63.
[0071] In the prior art, fixed components or structures may block or interfere with the angle or range of rotation of other components or structures.
[0072] In the above embodiments of this application, the second linkage part 42 is provided with a first clearance groove 421 capable of accommodating the sliding rod 63. During the rotation of the second linkage part 42, the interference of the sliding rod 63 on the second linkage part 42 is reduced, the rotation angle of the second linkage part 42 is expanded, and thus the range of coordinated movement between the seat cushion connecting mechanism 5 and the backrest connecting mechanism 2 is increased.
[0073] like Figure 3 and Figure 5 As shown, in the embodiments of this application, the elastic component 41 includes a third elastic element 413, an elastic adjustment seat 411, an adjustment tooth 412, an adjustment worm 414, and an adjustment handle 415.
[0074] The third elastic element 413 only needs to have the ability to elastically deform; its specific structure is not limited in the embodiments of this application. For example, the third elastic element 413 can be a spring, a rubber sleeve, etc. In the embodiments of this application, a spring is used as an example to illustrate the specific structure of the third elastic element 413. Specifically, the third elastic element 413 is rotatably connected to the second linkage part 42, and the third elastic element 413 is also rotatably connected to the base 1. The third elastic element 413 and the second linkage part 42 can be rotatably connected via a connecting shaft 13, and the third elastic element 413 and the base 1 can be rotatably connected via a rotating shaft.
[0075] The elastic adjustment seat 411 abuts against one end of the third elastic member 413 and is relatively stationary with respect to the third elastic member 413.
[0076] The adjusting tooth 412 is connected to the end of the elastic adjusting seat 411 away from the third elastic element 413. Specifically, there are various ways to connect the adjusting tooth 412 and the elastic adjusting seat 411, such as threaded connection, snap-fit, etc. In the embodiment of this application, the adjusting tooth 412 and the elastic adjusting seat 411 are connected by a threaded connection.
[0077] Additionally, one end of the adjusting worm 414 is engaged with the adjusting gear 412. The adjusting handle 415 is connected to the other end of the adjusting worm 414.
[0078] During the operation of the elastic component 41, the rotation of the adjusting handle 415 causes the adjusting worm 414 to drive the adjusting gear 412 to rotate. Since the elastic adjusting seat 411 is threadedly connected to the adjusting gear 412, the elastic adjusting seat 411 can move in the extension direction of the third elastic element 413, so that the third elastic element 413 is stretched or compressed.
[0079] In the prior art, elastic components often cannot adjust the preload, that is, the initial stiffness of the elastic element in the elastic component cannot be adjusted, which causes the elastic component to decrease in stiffness, deform and wear over time.
[0080] In the above embodiments of this application, the third elastic element 413 in the elastic component 41 can be stretched or compressed under the combined action of the adjusting worm gear 414, the elastic adjustment seat 411, and the adjusting gear 412, allowing the user to adjust the preload of the third elastic element 413, thereby adjusting the initial stiffness of the third elastic element 413; simultaneously, it can also adjust the initial restoring force of the backrest linkage chassis. In reciprocating motion or vibration environments, adjusting the preload can reduce the gaps at the mechanical structure connection points, improve the impact between structures, and reduce the noise generated.
[0081] In the embodiments of this application, the elastic component 41 further includes a guide rod 416. The guide rod 416 serves to provide axial guidance for other components or structures. The guide rod 416 can extend in one direction, and its specific structure is not limited in the embodiments of this application. For example, the guide rod 416 can be a cylinder extending in one direction, a cuboid extending in one direction, etc. In the embodiments of this application, the specific structure of the guide rod 416 is described as a cylinder extending in one direction.
[0082] Specifically, the guide rod 416 passes through the adjusting tooth 412 and the elastic adjusting seat 411 in sequence along the extension direction of the third elastic member 413, and at least part of its structure extends into the interior of the third elastic member 413.
[0083] In the prior art, elastic components often do not have guide rods 416. Therefore, during the process of adjusting the preload of the elastic element in the elastic component, the elastic element may bend laterally, which may lead to damage to the elastic element and friction between the elastic element and other structures or components.
[0084] In the above embodiments of this application, the guide rod 416 passes sequentially through the adjusting tooth 412 and the elastic adjustment seat 411 along the extending direction of the third elastic member 413, and at least a portion of its structure extends into the interior of the third elastic member 413. This allows the guide rod 416 to provide axial guidance and lateral restraint for the third elastic member 413 during tension or compression. This improves the situation where the third elastic member 413 undergoes lateral bending during tension or compression, which could lead to damage to the third elastic member 413 or friction with other structures or components.
[0085] In the embodiments of this application, the elastic component 41 further includes a connecting rod 417. The connecting rod 417 serves to transmit the power of one component or assembly to other structures or components of the device to achieve coordinated movement.
[0086] Specifically, one end of the connecting rod 417 is rotatably connected to the base 1, and the other end is rotatably connected to the seat cushion connecting mechanism 5.
[0087] In the above embodiment, one end of the connecting rod 417 is rotatably connected to the base 1, and the other end is rotatably connected to the seat cushion connecting mechanism 5. This allows the backrest connecting mechanism 2 and the seat cushion connecting mechanism 5 to move in tandem. When the backrest connecting mechanism 2 rotates under a downward force, the first linkage part 3 rotates along with the backrest connecting mechanism 2, and the first linkage part 3 drives the second linkage part 42 to rotate. Therefore, the second linkage part 42 can drive the seat cushion connecting mechanism 5 and the seat cushion to move in the horizontal direction, realizing the coordinated movement of the seat back and the seat cushion. At the same time, the base 1 and the seat cushion connecting mechanism 5 connected to the connecting rod 417 also achieve coordinated movement, improving the user experience.
[0088] In the embodiments of this application, the end of the third elastic member 413 near the connecting rod 417 is rotatably connected to the base 1 via the connecting shaft 13.
[0089] The connecting rod 417 is provided with a second clearance groove 4171, which can accommodate the connecting shaft 13.
[0090] In the prior art, fixed components or structures may block or interfere with the angle or range of rotation of other components or structures.
[0091] In the above embodiments of this application, the connecting rod 417 is provided with a second clearance groove 4171 that can accommodate the connecting shaft 13, so that during the rotation of the connecting rod 417, the interference of the connecting shaft 13 on the connecting rod 417 is reduced, the rotation angle of the connecting rod 417 is expanded, and thus the range of coordinated movement of the seat cushion connecting mechanism 5 and the backrest connecting mechanism 2 is increased.
[0092] According to another example embodiment of this application, this application provides a seat; the seat includes a backrest 7 and a backrest linkage chassis of any of the above embodiments.
[0093] Specifically, the backrest 7 is connected to the backrest connecting mechanism 2 in the backrest linkage chassis. There are multiple ways to connect the backrest 7 and the backrest connecting mechanism 2, such as: rotatable connection, fixed connection, and detachable connection.
[0094] In the above embodiments of this application, the backrest 7 is connected to the backrest connecting mechanism 2. When a user sits on the seat and leans back, causing the backrest to be subjected to a downward force, this downward force can be transmitted to the backrest connecting mechanism 2. The backrest connecting mechanism 2 rotates under the downward force, and the first linkage part 3, which is fixedly connected to the second end 22 of the backrest connecting mechanism 2, rotates along with the rotation of the backrest connecting mechanism 2. Since the first linkage part 3 is engaged with the second linkage part 42, the first linkage part 3 can drive the second linkage part 42 to rotate, and the second linkage part 42 can drive the seat cushion connecting mechanism 5 and the seat cushion connected above the seat cushion connecting mechanism 5 to move horizontally, realizing the coordinated movement of the seat backrest 7 and the seat cushion, and improving the user experience.
[0095] Finally, it should be noted that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions of the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A backrest linkage chassis, characterized in that, include: The base includes a base plate, two support plates and a connecting shaft. The two support plates are disposed opposite to each other on the base plate and are a certain distance apart. The connecting shaft is disposed between the two support plates. The backrest connection mechanism has a first end connected to the backrest and a second end rotatably connected to the base. The first linkage part is fixedly installed at the second end of the backrest connecting mechanism; A linkage mechanism is disposed between the two support plates, and the linkage mechanism includes: The second linkage part is rotatably connected to the base, engages with the first linkage part, and is also movably connected to the cushion connecting mechanism. The elastic component is rotatably connected to the second linkage part; When the backrest connecting mechanism is rotated by a force, the first linkage part can drive the second linkage part to rotate, and then the second linkage part drives the seat cushion connecting mechanism to move in the horizontal direction.
2. The backrest linkage chassis according to claim 1, characterized in that, The backrest connecting mechanism has two oppositely arranged sidewalls, one of which is provided with a plurality of stop holes, and the other is provided with a protruding structure. There are two second linkage parts, which are arranged opposite to each other, and a gear adjustment component is passed between the two second linkage parts; One end of the gear adjustment component is slidably connected to the protruding structure, and the other end of the gear adjustment component can be inserted into any one of the plurality of gear holes.
3. The backrest linkage chassis according to claim 2, characterized in that, The gear adjustment component includes: A sliding rod, through which two second linkage parts are inserted; A sliding sleeve is fitted onto the outer side of the middle part of the sliding rod and is able to slide relative to the sliding rod; The first elastic element is sleeved on a portion of the outer side of the sliding rod and is disposed near one of the two second linkage parts; The second elastic element is sleeved on a portion of the outer side of the sliding rod, with one end located close to the other of the two second linkage parts, and the other end abutting against the sliding sleeve. A stop is disposed between the first elastic member and the sliding sleeve, and is connected to the sliding rod.
4. The backrest linkage chassis according to claim 3, characterized in that, The sliding sleeve is connected to a control rod, which can drive the sliding sleeve to move along the extension direction of the sliding rod; The control lever, under the influence of a force, causes the sliding sleeve to move away from the center of the sliding rod. The sliding sleeve compresses the second elastic element, causing the second elastic element to change from an extended state to a compressed state. When the force compressing the first elastic element is released, the first elastic element changes from a compressed state to an extended state. The first elastic element pushes the stop and the sliding rod connected to the stop to move, and the sliding rod exits from the gear hole.
5. The backrest linkage chassis according to claim 3, characterized in that, The second linkage is provided with a first clearance groove, which can accommodate the sliding rod.
6. The backrest linkage chassis according to claim 1, characterized in that, The elastic component includes: The third elastic element is rotatably connected to the second linkage part and also rotatably connected to the base; The elastic adjustment seat abuts against one end of the third elastic element and remains stationary relative to the third elastic element; The adjusting tooth is connected to the end of the elastic adjusting seat away from the third elastic element; The adjusting worm gear has one end meshing with the adjusting gear. An adjusting handle is connected to the other end of the adjusting worm gear; The adjustment handle can be rotated to cause the adjustment worm to drive the adjustment tooth to rotate, and the elastic adjustment seat can rotate relative to the adjustment tooth. In this way, the elastic adjustment seat can move in the extension direction of the third elastic element so that the third elastic element is stretched or compressed.
7. The backrest linkage chassis according to claim 6, characterized in that, The elastic component also includes a guide rod; The guide rod passes through the adjusting tooth and the elastic adjusting seat in sequence along the extension direction of the third elastic element, and at least part of its structure extends into the interior of the third elastic element.
8. The backrest linkage chassis according to claim 6, characterized in that, The elastic component also includes a connecting rod; One end of the connecting rod is rotatably connected to the base, and the other end is rotatably connected to the cushion connecting mechanism.
9. The backrest linkage chassis according to claim 8, characterized in that, The third elastic element is rotatably connected to the base via the connecting shaft at one end near the connecting rod. The connecting rod is provided with a second clearance groove, which can accommodate the connecting shaft.
10. A type of seat, characterized in that, Includes a backrest and a backrest linkage chassis as described in any one of claims 1-9; The backrest is connected to the backrest connecting mechanism.