Angle adjusting mechanism, table plate assembly, seat and vehicle

Abstract

The utility model relates to an angle adjusting mechanism, a table board assembly, a seat and a vehicle. The angle adjusting mechanism comprises a connecting mechanism and a locking mechanism. The connecting mechanism is used for being connected with a to-be-adjusted part, and the to-be-adjusted part can drive the connecting mechanism to rotate. The locking mechanism comprises a rotating part and a locking part, the connecting mechanism is in transmission connection with the rotating part to drive the rotating part to rotate, the rotating part is provided with a plurality of locking parts at intervals in the rotating direction, and the locking part is in sliding fit with the rotating part and can be clamped with any one of the locking parts to limit the spatial position of the rotating part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of angle adjustment, in particular to an angle adjustment mechanism, a table board assembly, a seat and a vehicle. BACKGROUND

[0002] The requirement for the comfort of the automobile cabin is rapidly increasing, and the requirement for the functional components in the cabin is also increasing. A small table board as a product for placing articles in the vehicle has high practicability, and the loading rate in the vehicle is increasing. However, the angle of the existing seat small table board is not adjustable, and because the seat small table board is assembled on the front row backrest, the angle of the table board is limited by the use angle of the front row backrest. The angle of the table board cannot be adjusted to adapt to the requirements of users, for example, dining, writing, placing electronic devices and the like, and the use experience is poor. CONTENT OF THE UTILITY MODEL

[0003] The present application provides an angle adjustment mechanism, a table board assembly, a seat and a vehicle.

[0004] In a first aspect, the present application provides an angle adjustment mechanism. The angle adjustment mechanism comprises a connecting mechanism and a locking mechanism. The connecting mechanism is used for connecting a to-be-adjusted member. The to-be-adjusted member can drive the connecting mechanism to rotate. The locking mechanism comprises a rotating member and a locking member. The connecting mechanism is in transmission connection with the rotating member to drive the rotating member to rotate. The rotating member is spaced apart from the locking member along a rotating direction and is provided with a plurality of locking portions. The locking member is in sliding cooperation with the rotating member and can be in clamping connection with any one of the plurality of locking portions to limit the spatial position of the rotating member.

[0005] In some optional examples, the rotating member comprises a driving wheel, a driven wheel and a ratchet wheel. The driving wheel is in transmission connection with the connecting mechanism. The driven wheel is in meshing connection with the driving wheel. The number of teeth of the driven wheel is less than the number of teeth of the driving wheel. The ratchet wheel is coaxially connected with the driven wheel. The locking portions are arranged on the ratchet wheel. The locking member is in sliding cooperation with the ratchet wheel and can be in clamping connection with any one of the plurality of locking portions.

[0006] In some optional examples, the locking mechanism further comprises a mounting shell. The mounting shell is fixedly connected with the to-be-adjusted member. The rotating member and the locking member are rotatably arranged in the mounting shell.

[0007] In some optional examples, the ratchet wheel has a plurality of ratchet teeth. The locking portions are formed between adjacent two ratchet teeth. The locking member comprises a pawl. One end of the pawl is rotatably connected with the mounting shell. The other end of the pawl is movably limited between the adjacent two ratchet teeth.

[0008] In some optional examples, the locking member further comprises a first reset spring. The first reset spring comprises a deformation portion, a first end and a second end. The deformation portion is connected between the first end and the second end. The first end is connected with the pawl. The second end is connected with the mounting shell. The first reset spring is used for keeping the pawl in contact with the ratchet wheel.

[0009] In some optional examples, the outer peripheral wall of the ratchet wheel is provided with a reset portion, the reset portion is spaced apart from the ratchet teeth, the minimum radius of the circumference where the reset portion is located is greater than the maximum radius of the circumference where the ratchet teeth are located; the reset portion is used to push the pawl to rotate, the first reset spring is used to keep the pawl and the reset portion in contact; when the rotation axis, the first end and the second end of the pawl are on the same straight line, the first reset spring is in a balanced state, in the balanced state, one part of the pawl and the reset portion are in contact; when the reset portion pushes the pawl to rotate and makes the first reset spring deviate from the balanced state, the pawl and the ratchet wheel are spaced apart.

[0010] In some optional examples, the locking mechanism further comprises a reset member and a second reset spring, the reset member is rotatably connected to the mounting shell, one end of the second reset spring is connected to the reset member, and the other end of the second reset spring is connected to the mounting shell, the second reset spring is used to keep the position of the reset member to block the rotation of the pawl when the first reset spring deviates from the balanced state.

[0011] In some optional examples, the locking mechanism further comprises a lever, the lever is connected to the driving wheel, the reset member has opposite input and output ends, the input end is located on the path of rotation of the lever, the lever can drive the reset member to rotate relative to the mounting shell when the lever rotates, one end of the pawl is located on the rotation path of the output end, and the reset member can drive the pawl to rotate to contact the ratchet wheel when the reset member rotates.

[0012] In some optional examples, the connecting mechanism comprises a connecting seat, a first connecting rod and a second connecting rod, the connecting seat is used to be mounted on the target carrier, the first connecting rod is rotatably connected to the connecting seat and drivingly connected to the rotating member, and the second connecting rod is used to be rotatably connected between the to-be-adjusted member and the connecting seat.

[0013] In the second aspect, the application further provides a table board assembly, comprising a table board body and the angle adjusting mechanism, the connecting mechanism is connected to the table board body, and the table board body can drive the connecting mechanism to rotate.

[0014] In the third aspect, the application further provides a seat, comprising a seat cushion, a chair back and the table board assembly, the chair back is connected to the seat cushion, and the table board assembly is movably connected to the chair back.

[0015] In the fourth aspect, the application further provides a vehicle, comprising a vehicle body and the seat, and the seat is arranged in the vehicle body.

[0016] The angle adjusting mechanism provided by the application is applied to a table board assembly. When in use, a user can manually control the rotation of a to-be-adjusted part, and the to-be-adjusted part drives the connection mechanism to rotate synchronously. The connection mechanism drives the rotating part to rotate, and the locking part can be clamped with any one of the plurality of locking portions during the rotation of the rotating part to limit the spatial position of the rotating part, i.e., to limit the spatial position of the to-be-adjusted part. Each locking portion corresponds to a spatial position after being clamped with the locking part. The plurality of locking portions can limit the to-be-adjusted part at different spatial positions, so that the to-be-adjusted part is adjusted to different angles. The angle adjusting mechanism can adjust the angle of the table board assembly relative to the back of the chair, so that the table board assembly is not limited by the use angle of the back of the chair, and the user experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a structural schematic view of a table board assembly provided by an embodiment of the present application.

[0019] Figure 2 is a simplified structural schematic view of a seat provided by an embodiment of the present application.

[0020] Figure 3 is a simplified structural schematic view of a vehicle provided by an embodiment of the present application.

[0021] Figure 4 is Figure 1 is a structural schematic view of the skeleton and the angle adjusting mechanism of the table board assembly.

[0022] Figure 5 is Figure 4 is a structural schematic view of the locking mechanism of the angle adjusting mechanism.

[0023] Figure 6 is Figure 5 is a structural schematic view of the rotating part and the locking part of the locking mechanism.

[0024] Figure 7 is Figure 5 is a structural schematic view of the mounting shell of the locking mechanism.

[0025] Figure 8 is Figure 1 is a structural schematic view of the rotating part and the locking part when the table board assembly is at the lowest position.

[0026] Figure 9 is Figure 1The diagram shows the structure of the rotating and locking components when the tabletop assembly is in the first position.

[0027] Figure 10 yes Figure 1 The diagram shows the structure of the rotating and locking components when the tabletop assembly is in the second position.

[0028] Figure 11 yes Figure 1 The diagram shows the structure of the rotating and locking components when the tabletop assembly is in the fifth position.

[0029] Figure 12 yes Figure 6 The diagram shows the structure when the pawl is about to contact the reset component.

[0030] Figure 13 yes Figure 6 The diagram shows the structure of the pawl and ratchet when the first return spring is out of balance. Reference numerals: 100, Tabletop assembly; 10, Tabletop body; 12, Panel; 121, Clearance groove; 14, Frame; 141, Horizontal connecting frame; 143, Vertical connecting frame; 16, Drive shaft; 20, Angle adjustment mechanism; 30, Connecting mechanism; 32, Connecting seat; 34, First connecting rod; 36, Second connecting rod; 50, Locking mechanism; 51, Lever; 5201, Second rotating shaft; 5202, Fixed post; 5203, First rotating shaft; 5205, Return component rotating shaft; 521, Mounting shell; 5212, Peripheral wall; 5214, Side wall; 52 16. Cover plate; 523. Rotating component; 5232. Locking part; 524. Ratchet; 5241. Racket tooth; 5243. Reset part; 527. Driving wheel; 528. Driven wheel; 54. Locking component; 541. Pad; 5412. Limiting part; 56. First reset spring; 562. Deformation part; 564. First end; 566. Second end; 58. Reset component; 581. Input end; 583. Output end; 59. Second reset spring; 200. Seat; 201. Seat cushion; 203. Seat back; 300. Vehicle; 301. Vehicle body. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0032] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function. For example, the term "comprising" used throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem and basically achieve the technical effect within a certain margin of error.

[0033] Please also refer to Figure 1 and Figure 2 This application provides a tabletop assembly 100 for installation on a target carrier. This specification does not limit the specific type of the target carrier; for example, the target carrier can be a building wall, or it can be the backrest of a chair. In this embodiment, the tabletop assembly 100 is applied to a chair 200, and the target carrier is the backrest of the chair 200.

[0034] Please also refer to Figure 2 and Figure 3 This specification does not limit the application environment of seat 200. For example, seat 200 can be a seat in a public place such as a cinema or theater, or a seat in a means of transportation such as a vehicle or airplane. In this embodiment, seat 200 is applied to vehicle 300, and seat 200 can serve as the front seat of vehicle 300. Vehicle 300 may include vehicle body 301 and the aforementioned seat 200. Vehicle 300 may have multiple seats, which may include front seats and rear seats, and seat 200 can serve as the front seat of vehicle 300. Seat 200 may include seat cushion 201, seat back 203, and the aforementioned table assembly 100 (e.g., Figure 1 (As shown). The seat cushion 201 is located inside the vehicle body 301, the seat back 203 is connected to one side of the seat cushion 201, and the table assembly 100 is movably connected to the seat back 203. The table assembly 100 is located on the seat back 203 of the front seat 200, facilitating use by rear passengers within the vehicle 300, providing convenience and enhancing comfort for rear passengers.

[0035] As an example, the seat cushion 201 can be movably, for example, slidably, attached to the vehicle body 301, thereby facilitating passenger adjustment of seating space. The seat back 203 can be rotatably attached to the seat cushion 201, thereby facilitating passenger adjustment of the angle of the seat back 203 according to individual needs, enhancing the riding experience.

[0036] Please also refer to Figure 1 , Figure 4 and Figure 5In this embodiment, the tabletop assembly 100 may include a tabletop body 10 and an angle adjustment mechanism 20. The angle adjustment mechanism 20 may include a connecting mechanism 30 and a locking mechanism 50. The connecting mechanism 30 is used to connect the component to be adjusted, and the component to be adjusted can drive the connecting mechanism 30 to rotate. In this embodiment, the component to be adjusted is the tabletop body 10; in other embodiments, the component to be adjusted may be other structures that require angle adjustment. The tabletop body 10 has a drive shaft 16, and the connecting mechanism 30 is used to connect the drive shaft 16 and the target carrier (in this embodiment, the target carrier is the aforementioned chair back 203). The locking mechanism 50 and the connecting mechanism 30 are connected via the drive shaft 16, such as... Figure 6 As shown, the locking mechanism 50 may include a rotating member 523 and a locking member 54. The connecting mechanism 30 is connected to the rotating member 523 to drive the rotating member 523 to rotate. The rotating member 523 is fixedly connected to the drive shaft 16 to rotate with the drive shaft 16. The rotating member 523 is provided with a plurality of locking parts 5232 at intervals along the rotation direction. The locking member 54 is slidably engaged with the rotating member 523 and can engage with any one of the plurality of locking parts 5232 to limit the spatial position of the rotating member 523, that is, to limit the spatial position of the tabletop body 10. Each locking part 5232, after engaging with the locking member 54, corresponds to limiting a spatial position. By providing a plurality of locking parts 5232, the tabletop body 10 can be limited to different spatial positions, allowing the tabletop body 10 to be adjusted to different angles.

[0037] The tabletop body 10 is movably connected to the chair back 203 via an angle adjustment mechanism 20. During use, the user can manually control the movement of the tabletop body 10 relative to the chair back 203. When the tabletop body 10 moves, it drives the drive shaft 16 to rotate synchronously. The rotation of the drive shaft 16 drives the rotating component 523 to rotate. During the rotation of the rotating component 523, the locking component 54 can engage with any one of the multiple locking parts 5232 to limit the spatial position of the rotating component 523, thus limiting the spatial position of the tabletop body 10. Each locking part 5232, after engaging with the locking component 54, corresponds to a specific spatial position. By providing multiple locking parts 5232, the tabletop body 10 can be limited to different spatial positions, allowing it to be adjusted to different angles. The adjustable angle of the tabletop assembly 100 relative to the chair back 203 prevents it from being limited by the chair back 203's operating angle, thus improving the user experience.

[0038] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] Please refer to it again. Figure 1 and Figure 4 In this embodiment, the tabletop body 10 may include a plate 12, a frame 14, and the aforementioned drive shaft 16. The plate 12 is fixedly connected to the frame 14, the frame 14 is movably connected to the connecting mechanism 30, and the drive shaft 16 is rotatably connected to the frame 14. The plate 12 is plate-shaped and is used for users to place items. The plate 12 may be made of lightweight, high-strength composite materials, such as polycarbonate or polypropylene. The edges of the plate 12 may have a rounded transition, and it may also be provided with anti-overflow grooves or other structures to further improve the user experience.

[0040] The frame 14 connects the plate 12 and the connecting mechanism 30. The frame 14 serves two purposes: firstly, it supports the installation of the connecting mechanism 30 and the locking mechanism 50, and strengthens the connection between the plate 12 and the backrest 203; secondly, it acts as a load-bearing reinforcement device for the plate 12, improving its load-bearing capacity. The frame 14 is generally rectangular and may include two horizontal connecting frames 141 and two vertical connecting frames 143. The two horizontal connecting frames 141 and the two vertical connecting frames 143 are spaced apart, and both vertical connecting frames 143 are connected between the two horizontal connecting frames 141. Together, the two horizontal connecting frames 141 and the two vertical connecting frames 143 form a rectangular frame. The plate 12 can be fixedly connected to the two horizontal connecting frames 141 and the two vertical connecting frames 143 using bolts or other fasteners. The rectangular frame-like frame 14 improves both the connection strength between the plate 12 and the frame 14, and the uniformity of stress on the plate 12 during use. In some embodiments, the frame 14 may further include reinforcing ribs, which may be connected to two transverse connecting frames 141 and located between two longitudinal connecting frames 143. The reinforcing ribs may further improve the structural strength of the frame 14.

[0041] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," and "inside," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and are not intended to 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 limitations on this application. For example, "horizontal" and "vertical" in "horizontal connecting frame 141 and vertical connecting frame 143" can be understood as the orientation from the user's perspective when using the tabletop assembly 100, with the tabletop assembly 100 located in front of the user, from left to right (or from right to left) is "horizontal," and from front to back (or from back to front) is "vertical."

[0042] In this embodiment, the drive shaft 16 is rotatably connected between two longitudinal connecting frames 143, and can be parallel to the transverse connecting frame 141. The drive shaft 16 is used to drive the locking mechanism 50 to move and restrict the spatial position of the table body 10. The drive shaft 16 is located on the side of the frame 14 near the backrest 203, and the drive shaft 16 is also connected to the connecting mechanism 30. The connecting mechanism 30 may include a connecting seat 32, a first connecting rod 34 and a second connecting rod 36. The connecting seat 32 is used to install on the backrest 203. The first connecting rod 34 is fixedly connected to the drive shaft 16 and rotatably connected to the connecting seat 32. The second connecting rod 36 is rotatably connected between the table body 10 and the connecting seat 32. The connecting seat 32, the first connecting rod 34, the table body 10 and the second connecting rod 36 together form a planar linkage mechanism.

[0043] When the user controls the tabletop body 10 to rotate relative to the chair back 203, the first link 34 and the second link 36 move in coordination and rotate relative to the connecting seat 32. The coordinated movement of the first link 34 and the second link 36 enables the tabletop body 10 to achieve flexible and stable unfolding and folding functions. The planar linkage mechanism (connecting mechanism 30) can provide rigid support for the tabletop body 10, reducing the possibility of the tabletop body 10 wobbling during use.

[0044] The connecting seat 32 can be a bent sheet metal part, and it can be fixedly connected to the reserved connection point of the chair back 203 by bolts or other fasteners. The edge of the connecting seat 32 can be bent to facilitate the connection of the first connecting rod 34 and the second connecting rod 36. One end of the first connecting rod 34 is rotatably connected to the connecting seat 32, and the other end is fixedly connected to the drive shaft 16. The first connecting rod 34 is rotatably connected to the longitudinal connecting frame 143 through the drive shaft 16. One end of the second connecting rod 36 is rotatably connected to the connecting seat 32, and the other end is rotatably connected to the longitudinal connecting frame 143. The connection points of the first connecting rod 34 and the connecting seat 32, and the connection points of the second connecting rod 36 and the connecting seat 32 are arranged at intervals along the extension direction of the chair back 203. For example, when the chair back 203 is vertically arranged, the connection points of the first connecting rod 34 and the connecting seat 32, and the connection points of the second connecting rod 36 and the connecting seat 32 are arranged at intervals along the vertical direction. The connections between the first link 34 and the longitudinal connecting frame 143, and between the second link 36 and the longitudinal connecting frame 143, are spaced apart along the extending direction of the longitudinal connecting frame 143. The length of the first link 34 is shorter than the length of the second link 36. When the tabletop body 10 is unfolded, the second link 36 is located above the first link 34. The cooperation of the first link 34 and the second link 36 improves the stability of the tabletop assembly 100 angle adjustment.

[0045] In this embodiment, the plate 12 may be provided with a clearance groove 121 for the first link 34 and / or the second link 36 to pass through, so as to avoid interference with the first link 34 and / or the second link 36 when the table body 10 moves.

[0046] The number of connecting mechanisms 30 can be two, with the two connecting mechanisms 30 located on both sides of the frame 14 and connected to the two longitudinal connecting frames 143 respectively. The two connecting mechanisms 30 improve the connection stability between the table body 10 and the chair back 203, while ensuring the adjustment stability of the table body 10 relative to the chair back 203 when adjusting the angle.

[0047] Please also refer to Figure 4 , Figure 5 and Figure 6In this embodiment, the locking mechanism 50 is disposed on the frame 14 and driven by the drive shaft 16, and is used to lock the spatial position of the table body 10 relative to the backrest 203. A rotating member 523 is disposed on the horizontal connecting frame 141 near the connecting mechanism 30, and the drive shaft 16 is located on one side of the horizontal connecting frame 141. The locking mechanism 50 may also include a mounting housing 521, which is fixedly connected to the table body 10. The rotating member 523 is rotatably disposed within the mounting housing 521 and driven by the drive shaft 16. A locking part 5232 is disposed on the rotating member 523, and a locking member 54 is disposed within the mounting housing 521. The rotating member 523 is mounted to the table body 10 via the mounting housing 521. The rotation of the drive shaft 16 drives the rotating member 523 to rotate, and the rotating member 523 is limited in space by the locking part 5232 cooperating with the locking member 54.

[0048] The mounting housing 521 can be fixedly connected to the transverse connecting frame 141 by bolts. The mounting housing 521 may include a peripheral wall 5212, a side wall 5214, and a cover plate 5216. The peripheral wall 5212 is connected to the side wall 5214 around its periphery and is fixedly connected to the transverse connecting frame 141. The cover plate 5216 is connected to the side of the peripheral wall 5212 opposite to the side wall 5214. The drive shaft 16 is rotatably passed through the side wall 5214 and the cover plate 5216 in sequence and is fixedly connected to the rotating member 523. It should be understood that the "fixed connection" between the rotating member 523 and the drive shaft 16 should be understood as the rotating member 523 being relatively fixed to the drive shaft 16, and the rotating member 523 being able to rotate with the rotation of the drive shaft 16. In some embodiments, the cover plate 5216 may cover only one side of the peripheral wall 5212 near the drive shaft 16, so that part of the space inside the peripheral wall 5212 is exposed to the outside through the other side, which facilitates the installation of other structures of the rotating member 523.

[0049] The rotating member 523 is rotatably connected within the mounting housing 521, and can be rotatably engaged with the side wall 5214 and / or the cover plate 5216 via a rotating shaft. This specification does not limit the specific limiting method between the locking part 5232 and the locking member 54 of the rotating member 523. For example, the locking part 5232 can be a limiting groove formed on the rotating member 523, and the locking member 54 can be a snap-fit ​​structure, a spring pin structure, etc. In this embodiment, the rotating member 523 includes a ratchet 524, and the locking member 54 includes a pawl 541. The ratchet 524 has multiple ratchet teeth 5241, and the aforementioned locking part 5232 is formed between two adjacent ratchet teeth 5241. The pawl 541 slides with the ratchet 524 and can engage with any one of the multiple ratchet teeth 5241. One end of the pawl 541 is rotatably connected to the mounting housing 521, and the other end is movably limited to the locking part 5232. The ratchet 524 and pawl 541 have a simple structure and stable operation. The pawl 541 can effectively prevent the ratchet 524 from flipping, ensuring that the drive shaft 16 remains in a fixed position when stopped, preventing accidental movement. The cooperation between the ratchet 524 and pawl 541 improves the rotational reliability of the table assembly 100 and its stability during fixed use.

[0050] In this embodiment, the rotating component 523 may further include a driving wheel 527 and a driven wheel 528. The driving wheel 527 is rotatably connected to the mounting housing 521 and fixedly connected to the drive shaft 16, i.e., the driving wheel 527 is drive-connected to the connecting mechanism 30. The driven wheel 528 is coaxially connected to the ratchet 524 and meshes with the driving wheel 527. The number of teeth on the driven wheel 528 is less than the number of teeth on the driving wheel 527. By setting the driving wheel 527 and the driven wheel 528 between the drive shaft 16 and the ratchet 524, the rotation angle of the table body 10 relative to the chair back 203 can be amplified, increasing the adjustment range.

[0051] As one example, the two ends of the shaft of the drive wheel 527 are rotatably inserted through the side wall 5214 and the cover plate 5216, respectively. The drive shaft 16 may include two coaxial branch shafts, which are fixedly connected to the two ends of the drive wheel 527, respectively. In another example, the drive shaft 16 and the shaft of the drive wheel 527 may be integrally formed, with the drive shaft 16 passing through the mounting housing 521 and fixedly connected to the drive wheel 527. The driven wheel 528 is fixedly connected to one side of the ratchet 524, and the diameter of the driven wheel 528 is smaller than the diameter of the ratchet 524.

[0052] Please also refer to Figure 6 and Figure 7The mounting housing 521 may further include a first rotating shaft 5203 and a second rotating shaft 5201. A rotating member 523 is rotatably connected to the first rotating shaft 5203, and a locking member 54 is rotatably connected to the second rotating shaft 5201. Both the first rotating shaft 5203 and the second rotating shaft 5201 are fixedly connected to the side wall 5214 and spaced apart. The second rotating shaft 5201 is located on the side of the first rotating shaft 5203 opposite to the drive wheel 527. A ratchet 524 (driven wheel 528) is rotatably connected to the first rotating shaft 5203. The locking member 54 is rotatably connected to the second rotating shaft 5201, with one end of the locking member 54 confined to the locking portion 5232. The locking member 54 includes a pawl 541, and the locking portion 5232 is the space between two adjacent ratchet teeth 5241. One end of the pawl 541 is rotatably connected to the second rotating shaft 5201, and the other end is a pointed tip for engaging with the ratchet teeth 5241. To ensure a reliable engagement between the tip of the pawl 541 and the ratchet 524, in this embodiment, the locking member 54 may further include a first return spring 56. The first return spring 56 includes a deformation portion 562, a first end 564, and a second end 566. The deformation portion 562 is connected between the first end 564 and the second end 566. The first end 564 is connected to the pawl 541, and the second end 566 is connected to the mounting housing 521. The first return spring 56 is used to keep the locking member 54 in contact with the locking part 5232, ensuring that the locking member 54 can be engaged in one of the locking parts 5232 during the rotation of the rotating member 523.

[0053] As an example, the first return spring 56 is generally U-shaped, and the deformable portion 562 includes an arcuate segment and straight extensions connecting the two ends of the arcuate segment. The first end 564 and the second end 566 are respectively connected to the pawl 541 and the side wall 5214. When the pawl 541 rotates, the first return spring 56 stores energy through torsion to provide a restoring force to the pawl 541. To facilitate the installation of the first return spring 56, the mounting housing 521 may also include a fixing post 5202, which is fixedly connected to the side wall 5214. The first end 564 is fixedly connected to the pawl 541, located between the two ends of the pawl 541 and close to the second pivot 5201. The second end 566 is fixedly connected to the fixing post 5202, located between the two ends of the pawl 541 and close to the tip of the pawl 541.

[0054] When the second shaft 5201, the first end 564, and the second end 566 are aligned on the same straight line, the first return spring 56 is in a balanced state. When the pawl 541 rotates around the second shaft 5201, the first return spring 56 twists, generating a restoring torque opposite to the direction of rotation. In this embodiment, when the first return spring 56 is in a balanced state, the tip of the pawl 541 contacts the ratchet 524. Please refer to [link / reference]. Figure 8When the ratchet 524 rotates counterclockwise, it pushes the tip of the pawl 541 to rotate clockwise, causing the first return spring 56 to twist and generate a restoring torque that makes the pawl 541 rotate counterclockwise, thereby causing the tip of the pawl 541 to fall into the locking part 5232 to achieve locking.

[0055] As an example, the number of locking parts 5232 can be set to 5. In use, when the user pulls the table body 10 down to its lowest position from the backrest 203, the first link 34 and the second link 36 prevent the table body 10 from rotating further downwards. When the user adjusts the table, they slightly lift the table body 10 upwards. (See [reference needed]). Figure 8 and Figure 9 The drive wheel 527 moves along with the drive shaft 16 (such as...) Figure 4 (As shown) Rotating clockwise causes the driven wheel 528 to drive the ratchet 524 to rotate counterclockwise, and the first return spring 56 causes the tip of the pawl 541 to engage with the first locking part 5232 (as shown). Figure 9 As shown), this is the first position of the tabletop assembly 100. If the user needs to continue adjusting, continue to slightly raise the tabletop body 10, the ratchet 524 continues to rotate counterclockwise, and the tip of the pawl 541 engages with the second locking part 5232 (as shown). Figure 10 As shown), this is the second position of the tabletop assembly 100. The user can continue to lift the tabletop body 10, causing the pawl 541 to engage with the third, fourth, and fifth locking parts 5232 in sequence, thereby achieving five angle adjustments to the tabletop assembly 100. Figure 11 As shown, when the pawl 541 is engaged with the fifth locking part 5232, the tabletop body 10 is in its highest position. When the locking member 54 engages with the locking part 5232, the rotating member 523 cannot rotate clockwise, but can only continue to rotate counterclockwise to make the locking member 54 engage with the next locking part 5232, thereby realizing the angle adjustment and position locking of the tabletop body 10.

[0056] Please also refer to Figure 11 and Figure 12 In this embodiment, the outer peripheral wall of the ratchet 524 is provided with a reset portion 5243, which is spaced apart from the ratchet 5241. The minimum radius of the circumference where the reset portion 5243 is located is greater than the maximum radius of the circumference where the ratchet 5241 is located. The reset portion 5243 is used to push the pawl 541 to rotate. When the first return spring 56 is in a balanced state, a portion of the pawl 541 and the reset portion 5243 are in contact. The distance between the rotation centers of the reset portion 5243 and the ratchet 524 gradually changes. During rotation, the reset portion 5243 contacts and pushes the pawl 541, causing the first return spring 56 to disengage from the balanced state, and the pawl 541 and the ratchet 524 to become spaced apart (e.g., ...). Figure 13 (As shown).

[0057] If the user needs to fold up the tabletop assembly 100, they can manually lift the tabletop body 10 upwards (e.g., Figure 4 As shown), the driving wheel 527 rotates clockwise, driving the ratchet 524 to rotate counterclockwise via the driven wheel 528. As the ratchet 524 rotates, the locking member 54 slides out of the last locking part 5232 and then contacts the reset part 5243. As the ratchet 524 continues to rotate, the reset part 5243 pushes the locking member 54 to rotate clockwise until the second end 566 deviates from the second shaft 5201 and the first end 564 (as shown). Figure 6 and Figure 7 On the straight line (as shown), the first return spring 56 is disengaged from its equilibrium state. The direction of the elastic potential energy stored in the first return spring 56 changes, and it no longer drives the pawl 541 to return to its original position. Instead, it drives the pawl 541 to rotate clockwise through torsional force, so that its tip moves away from the ratchet 524 and is spaced apart from the ratchet 524. Figure 13 As shown. At this time, the table body 10 can be put down or put away at will, the pawl 541 no longer restricts the rotation of the ratchet 524, and the user can now retract the table body 10 to the chair back 203.

[0058] This specification does not limit the specific structure of the reset part 5243. For example, the reset part 5243 may be a lever, a protrusion, or other structure fixedly connected to the outer peripheral wall of the ratchet 524. Alternatively, the reset part 5243 may be a planar structure or a protruding structure integrally formed on the peripheral wall of the ratchet 524.

[0059] Please also refer to Figure 6 , Figure 7 and Figure 13 In this embodiment, the locking mechanism 50 may further include a reset member 58 and a second reset spring 59. The reset member 58 is rotatably connected to the mounting housing 521. One end of the second reset spring 59 is connected to the reset member 58, and the other end is connected to the mounting housing 521. The second reset spring 59 is used to maintain the position of the reset member 58 to prevent the pawl 541 from rotating when the first reset spring 56 is out of balance. The second reset spring 59 prevents the pawl 541 from rotating too much under the action of the first reset spring 56 when out of balance, thus affecting the reset.

[0060] To facilitate the installation of the reset member 58, the mounting housing 521 may further include a reset member shaft 5205, which is fixedly connected to the side wall 5214 and located on the side of the first shaft 5203 away from the second shaft 5201. The reset member 58 is generally shaped like a rocker arm and is rotatably connected to the reset member shaft 5205. A second reset spring 59 is connected between the reset member 58 and the side wall 5214, and is used to limit the position of the reset member 58 to prevent it from rotating spontaneously. The pawl 541 has a limiting portion 5412 located at the end of the pawl 541 away from its tip. When the second reset spring 59 is out of balance, such as... Figure 13 As shown, one end of the reset member 58 abuts against the side of the limiting part 5412 facing the ratchet 524 to restrict the pawl 541 from continuing to rotate clockwise.

[0061] In this embodiment, the locking mechanism 50 may further include a lever 51 connected to the drive wheel 527. The reset member 58 has an input end 581 and an output end 583 facing away from each other. The input end 581 is located on the rotation path of the lever 51. When the lever 51 rotates, it can drive the reset member 58 to rotate relative to the mounting housing 521. One end of the pawl 541 is located on the rotation path of the output end 583, that is, the limiting part 5412 of the pawl 541 is located on the rotation path of the output end 583. When the reset member 58 rotates, it can drive the pawl 541 to rotate so as to contact the ratchet 524. The lever 51 may be fixedly connected to the side of the drive wheel 527 facing the reset member 58. The lever 51 is arranged close to the outer edge of the drive wheel 527 so that the input end 581 can be located on the rotation path of the lever 51.

[0062] When the user needs to use the tabletop assembly 100 again, they manually pull out the tabletop body 10 and press it down. At this time, the drive shaft 16 drives the drive wheel 527 to rotate counterclockwise, and the lever 51 on the drive wheel 527 also rotates counterclockwise with the drive wheel 527. The input end 581 is located on the path of the lever 51's rotation. The lever 51 pushes the input end 581 to rotate clockwise, causing the output end 583 to press down clockwise. The output end 583 pushes the limiting part 5412, causing the pawl 541 to rotate counterclockwise. The tip of the pawl 541 contacts the ratchet 524 again. At this time, the first return spring 56 returns to the equilibrium state to maintain the contact between the pawl 541 and the ratchet 524. When the user needs to adjust the angle of the tabletop body 10, the above five-position adjustment operation is repeated. The setting of the lever 51, the reset part 58, and the second return spring 59 enables the tabletop assembly 100 to completely and repeatedly perform the process of lowering, adjusting the angle, and folding up.

[0063] When in use, the tabletop assembly 100 provided in this application allows the user to manually control the movement of the tabletop body 10 relative to the chair back 203. When the tabletop body 10 moves, it drives the drive shaft 16 to rotate synchronously. The rotation of the drive shaft 16 drives the rotating component 523 to rotate. During the rotation of the rotating component 523, the locking component 54 can be movably positioned within one of the multiple locking parts 5232 to restrict the spatial position of the tabletop body 10, thereby ensuring the tabletop body 10 remains stable after the user stops manually controlling it, facilitating user operation. The angle of the tabletop assembly 100 relative to the chair back 203 is adjustable, preventing it from being limited by the usage angle of the chair back 203 and improving the user experience.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An angle adjustment mechanism, characterized in that, include: A connecting mechanism is used to connect the component to be adjusted, and the component to be adjusted can drive the connecting mechanism to rotate. The locking mechanism includes a rotating member and a locking member. The connecting mechanism is connected to the rotating member in a transmission manner to drive the rotating member to rotate. The rotating member is provided with a plurality of locking parts at intervals along the rotation direction. The locking member slides with the rotating member and can engage with any one of the plurality of locking parts to limit the spatial position of the rotating member.

2. The angle adjustment mechanism as described in claim 1, characterized in that, The rotating component includes a driving wheel, a driven wheel, and a ratchet. The driving wheel is connected to the connecting mechanism. The driven wheel meshes with the driving wheel. The number of teeth on the driven wheel is less than the number of teeth on the driving wheel. The ratchet is coaxially connected to the driven wheel. The locking part is disposed on the ratchet. The locking part slides with the ratchet and can engage with any one of the multiple locking parts.

3. The angle adjustment mechanism as described in claim 2, characterized in that, The locking mechanism further includes a mounting housing for fixed connection to the member to be adjusted, and the rotating member and the locking member are rotatably disposed within the mounting housing.

4. The angle adjustment mechanism as described in claim 3, characterized in that, The ratchet has multiple ratchet teeth, and the locking part is formed between two adjacent ratchet teeth; the locking member includes a pawl, one end of which is rotatably connected to the mounting housing, and the other end is movably limited between two adjacent ratchet teeth.

5. The angle adjustment mechanism as described in claim 4, characterized in that, The locking component further includes a first return spring, which includes a deformable portion, a first end, and a second end. The deformable portion is connected between the first end and the second end. The first end is connected to the pawl, and the second end is connected to the mounting housing. The first return spring is used to keep the pawl in contact with the ratchet.

6. The angle adjustment mechanism as described in claim 5, characterized in that, The ratchet has a reset portion on its outer peripheral wall, which is spaced apart from the ratchet teeth. The minimum radius of the circumference where the reset portion is located is greater than the maximum radius of the circumference where the ratchet teeth are located. The reset portion is used to push the pawl to rotate, and the first reset spring is used to keep the pawl and the reset portion in contact. When the pawl's axis of rotation, the first end, and the second end are on the same straight line, the first reset spring is in a balanced state. In this balanced state, the pawl and a portion of the reset portion are in contact. When the reset portion pushes the pawl to rotate and causes the first reset spring to disengage from the balanced state, the pawl and the ratchet are spaced apart.

7. The angle adjustment mechanism as described in claim 6, characterized in that, The locking mechanism further includes a reset member and a second reset spring. The reset member is rotatably connected to the mounting housing. One end of the second reset spring is connected to the reset member, and the other end is connected to the mounting housing. The second reset spring is used to maintain the position of the reset member to prevent the pawl from rotating when the first reset spring is out of the balance state.

8. The angle adjustment mechanism as described in claim 7, characterized in that, The locking mechanism further includes a lever connected to the drive wheel. The reset member has an input end and an output end facing opposite directions. The input end is located on the rotation path of the lever. When the lever rotates, it can drive the reset member to rotate relative to the mounting housing. One end of the pawl is located on the rotation path of the output end. When the reset member rotates, it can drive the pawl to rotate so as to contact the ratchet.

9. The angle adjustment mechanism as described in any one of claims 1 to 8, characterized in that, The connecting mechanism includes a connecting seat, a first connecting rod, and a second connecting rod. The connecting seat is used to install on the target carrier. The first connecting rod is rotatably connected to the connecting seat and is also drively connected to the rotating component. The second connecting rod is rotatably connected between the component to be adjusted and the connecting seat.

10. A tabletop assembly, characterized in that, It includes a tabletop body and an angle adjustment mechanism as described in any one of claims 1 to 9, wherein the connecting mechanism is connected to the tabletop body, and the tabletop body can drive the connecting mechanism to rotate.

11. A type of seat, characterized in that, The device includes a seat cushion, a backrest, and a table assembly as described in claim 10, wherein the backrest is connected to the seat cushion and the table assembly is movably connected to the backrest.

12. A vehicle, characterized in that, include: Vehicle body; And the seat as described in claim 11, wherein the seat is disposed within the vehicle body.

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