Turnover mechanism and turnover table top

Abstract

The application discloses a turnover mechanism and a turnover table board, and relates to the field of vehicle accessories. The turnover mechanism comprises a supporting arm assembly and an elastic traction assembly. The supporting arm assembly comprises a first supporting arm and a second supporting arm, and the second supporting arm can rotate relative to the first supporting arm in a first rotation direction and a second rotation direction, wherein the first rotation direction is opposite to the second rotation direction. The elastic traction assembly is connected to the first supporting arm and the second supporting arm, and the elastic traction assembly comprises a traction rope, which is tensioned under the elastic force of the elastic traction assembly, so that the second supporting arm has a tendency to rotate in the second rotation direction. In the application, the second supporting arm will not suddenly accelerate rotation due to the influence of the idle stroke and the change of the direction of the gravity torque, so that the nodding phenomenon can be eliminated, and the use experience of the user is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle parts technology, and more specifically, to a flipping mechanism and a flip-type table. Background Technology

[0002] In related technologies, flip-up tabletops use a drive assembly to rotate the horizontal support arm. However, there is a certain assembly gap within the drive assembly or between the drive shaft and the horizontal support arm, creating a certain amount of free travel. This causes a change in the direction of the gravitational torque when the center of gravity of the horizontal support arm rotates past directly above the horizontal axis of rotation. Due to this free travel, the horizontal support arm experiences a sudden acceleration under gravity when the direction of the gravitational torque changes, resulting in a "nodding" phenomenon. Although the free travel is often short, this phenomenon is amplified when the horizontal support arm has a certain length, leading to a decreased user experience. Utility Model Content

[0003] The purpose of this application is to provide a flipping mechanism and a flipping tabletop, which can improve the nodding phenomenon of the support arm of the flipping mechanism when rotating, so as to improve the user experience.

[0004] The embodiments of this application can be implemented as follows: In a first aspect, this application provides a flipping mechanism, comprising: The outrigger assembly includes a first outrigger and a second outrigger, the second outrigger being rotatably connected to the first outrigger, and the second outrigger being rotatable relative to the first outrigger in a first rotational direction and a second rotational direction, the first rotational direction being opposite to the second rotational direction; An elastic traction assembly is connected to a first arm and a second arm. The elastic traction assembly includes a traction rope, which is tensioned under the elastic force of the elastic traction assembly to give the second arm a tendency to rotate in a second direction of rotation.

[0005] In an optional embodiment, a winding section is provided on the first or second arm, and the traction rope is wound around the winding section and changes its extension direction through the winding section.

[0006] In an optional embodiment, the winding portion has an abutment surface, which is an arcuate surface extending about the rotation axis of the second arm.

[0007] In an optional embodiment, the rotation axis of the second arm passes through the winding portion, or the winding portion is spaced apart from the rotation axis of the second arm.

[0008] In an optional embodiment, the first arm includes two sidewalls spaced apart, the second arm includes two mating parts spaced apart, the two sidewalls are located between the two mating parts, the rotation axis of the second arm passes through the two sidewalls and the two mating parts, and the winding part is disposed on one of the sidewalls.

[0009] In an alternative embodiment, the winding portion is disposed on one side of one sidewall away from the other sidewall.

[0010] In an optional embodiment, one of the sidewalls has a notch at its edge, and the end of the traction rope has a limiting part, which is inserted into the notch and abuts against the sidewall.

[0011] In an optional embodiment, the elastic traction assembly further includes an elastic element, to which the traction rope is connected, and the elastic element is connected to a first arm or a second arm. The elastic element is used to provide an elastic force to tension the traction rope.

[0012] In an optional embodiment, the elastic element is connected to the second arm, one end of the traction rope is connected to the elastic element, and the other end of the traction rope is connected to the first arm.

[0013] In an optional implementation, the elastic element is a tension spring.

[0014] In an optional embodiment, the traction rope is an elastic rope, with its two ends connected to the first arm and the second arm, respectively.

[0015] In an optional embodiment, the tilting mechanism further includes a drive assembly, the drive shaft of which is connected to the second arm in a transmission manner, and the drive assembly is used to drive the second arm to rotate.

[0016] In an optional embodiment, a winding section is provided on the first or second arm, the traction rope is wound around the winding section and changes its extension direction through the winding section, the winding section has a clearance groove, and the drive shaft of the drive assembly passes through the clearance groove and is connected to the second arm.

[0017] In an optional implementation, the drive assembly includes a motor, the output shaft of which is drive-connected to the second arm.

[0018] In an optional implementation, the drive assembly includes a motor and a gear set, with the motor's output shaft connected to the second arm via the gear set.

[0019] In an optional embodiment, the output shaft of the motor is perpendicular to the rotation axis of the second arm, and the gear set includes a first gear and a second gear, which are two meshing bevel gears.

[0020] In an optional embodiment, the second arm has a first position and a second position during its rotational stroke relative to the first arm. The second arm is capable of rotating from the first position to the second position along a first rotational direction, or rotating from the second position to the first position along a second rotational direction. At least one of the first arm and the second arm is provided with a stop portion, which is used to prevent the second arm from continuing to rotate along the first rotational direction from the second position.

[0021] In an optional implementation, when the second arm is in the second position, the first arm is perpendicular to the second arm.

[0022] In an optional embodiment, the drive assembly includes a first motor and a second motor, the flipping mechanism also includes a base, the first arm is rotatably connected to the base, the output shaft of the first motor is drive-connected to the first arm, the first motor is used to drive the first arm to rotate relative to the base, the output shaft of the second motor is drive-connected to the second arm, and the second motor is used to drive the second arm to rotate relative to the first arm.

[0023] In an optional implementation, the rotation axis of the first arm is perpendicular to the rotation axis of the second arm.

[0024] Secondly, this application provides a flip-up tabletop, including a cutting board and a flipping mechanism as described in any of the first aspects above, wherein the cutting board is connected to a second support arm.

[0025] The beneficial effects of the flipping mechanism and flipping tabletop provided in this application embodiment include: The tilting mechanism provided in this application includes a support arm assembly and an elastic traction assembly. The support arm assembly includes a first arm and a second arm, with the second arm rotatably connected to the first arm. The second arm is capable of rotating relative to the first arm in a first rotational direction and a second rotational direction, the first rotational direction being opposite to the second rotational direction. The elastic traction assembly is connected to the first and second arms and includes a traction rope. The traction rope is tensioned under the elastic force of the elastic traction assembly, causing the second arm to tend to rotate along the second rotational direction. By providing the elastic traction assembly, the tensioned traction rope can provide a torque to the second arm along the second rotational direction. This torque is greater than the torque generated by the weight of the second arm, ensuring that even if the direction of the gravitational torque changes when the center of gravity of the second arm passes directly above the rotation axis, the direction of the total torque provided by gravity and the elastic traction assembly remains unchanged. In this case, the second arm will not experience sudden acceleration due to idle travel and changes in the direction of the gravitational torque, thus eliminating the nodding phenomenon and improving the user experience.

[0026] The flip-top tabletop provided in this application includes a cutting board and the aforementioned flipping mechanism, with the cutting board connected to the second arm. In this application, the second arm and cutting board of the flip-top tabletop do not exhibit any nodding phenomenon, resulting in a better user experience. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram showing the second arm of the flip-top table and the center of gravity of the table on the left side of the axis of rotation; Figure 2 A schematic diagram showing that the center of gravity of the second arm of the flip tabletop and the cutting board is directly above the axis of rotation; Figure 3 A schematic diagram showing the second arm of the flip-top table and the center of gravity of the table on the right side of the axis of rotation; Figure 4 This is a schematic diagram showing the changes in the mating surfaces of the first and second transmission parts before and after the sudden change in the direction of the gravitational torque. Figure 5 This is a schematic diagram of a flip-up tabletop in one embodiment of this application; Figure 6 This is an exploded view of a flip-up tabletop in one embodiment of this application; Figure 7 for Figure 5 A cross-sectional view along the AA direction; Figure 8 This is a first schematic diagram of the power-off portion of the outrigger assembly in one embodiment of this application; Figure 9 This is a second schematic diagram of the power-off portion of the outrigger assembly in one embodiment of this application; Figure 10 This is a schematic diagram of the winding portion arrangement in another embodiment of this application; Figure 11 This is a schematic diagram of the first installation of the traction rope in one embodiment of this application; Figure 12 This is a schematic diagram of the second installation of the traction rope in one embodiment of this application; Figure 13 This is a schematic diagram of the second arm after it has rotated to the second position in one embodiment of this application; Figure 14 This is a schematic diagram of a flip-up tabletop in another embodiment of this application; Figure 15 This is an exploded view of a flip-up tabletop in another embodiment of this application; Figure 16 This is a schematic diagram of a flip-up tabletop in another embodiment of this application; Figures 17 to 20 This is a schematic diagram of the various stages in the unfolding process of the flip-up tabletop in one embodiment.

[0029] Icons: 100-First arm; 101-First housing; 102-First cover; 110-Side wall; 111-Assembly slot; 112-Notch; 120-Winding part; 121-Abutting surface; 122-Allowing groove; 130-Stop part; 200-Second arm; 201-Second housing; 202-Second cover; 210-Matching part; 300-Traction rope; 310-Elastic element; 320-Limiting part; 400-Motor; 401-First transmission part; 402-Second transmission part; 410-Drive shaft; 420-First gear; 430-Second gear; 440-Motor bracket; 500-Cutting board; 600-Base. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0035] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0036] Figure 1 A schematic diagram showing that the center of gravity of the second support arm 200 and the cutting board 500 of the flip-top table is on the left side of the rotation axis; Figure 2 A schematic diagram showing that the center of gravity of the second support arm 200 and the cutting board 500 of the flip tabletop is directly above the axis of rotation; Figure 3 This is a schematic diagram showing that the center of gravity of the second support arm 200 and the cutting board 500 of the flip-top table is on the right side of the rotation axis. (See diagram below.) Figures 1 to 3 As shown, the flip-up tabletop in the related technology includes a first arm 100, a second arm 200, and a cutting board 500. During the process of the cutting board 500 and the second arm 200 changing from a vertical state to a horizontal state, the center of gravity of the cutting board 500 and the second arm 200 will shift from one side of the rotation axis (e.g., ...). Figure 1 Rotate the left side (as shown) to directly above the axis of rotation (e.g., the left side) Figure 2 As shown), then rotate to the other side of the rotation axis (as shown). Figure 2 (As shown on the right). During this process, the direction of the torque provided by gravity changes. For example, in Figure 1 In the state shown, the direction of the gravitational torque is counterclockwise; Figure 2 In the state shown, the gravitational torque is zero; Figure 3 In the state shown, the direction of the gravitational torque is clockwise. When the second arm 200 is driven to rotate by the drive assembly, the sudden change in the direction of the gravitational torque will cause a nodding phenomenon. Figure 4 This diagram illustrates the change in the mating surfaces of the first transmission unit 401 and the second transmission unit 402 before and after a sudden change in the direction of gravitational torque. Along the transmission direction from the motor 400 to the second support arm 200, the second transmission unit 402 is located downstream of the first transmission unit 401. The first transmission unit 401 and the second transmission unit 402 can be any two components with a mating clearance in the entire transmission chain, such as two transmission units within a drive assembly; the first transmission unit 401 and the second transmission unit 402 can also be mating shafts on the drive shaft 410 of the drive assembly and the second support arm 200, respectively. Figure 4 It can be seen that there is a clearance between the first transmission part 401 and the second transmission part 402. When the center of gravity of the second support arm 200 and the cutting board 500 is located on the left side of the rotation axis (corresponding to...) Figure 1 The second transmission unit 402 has a counterclockwise rotational tendency relative to the first transmission unit 401, and when the center of gravity of the second support arm 200 and the cutting board 500 is located on the right side of the rotation axis (corresponding to...). Figure 3The second transmission part 402 has a clockwise rotational tendency relative to the first transmission part 401. With the first transmission part 401 almost stationary, the second transmission part 402 rotates clockwise by a certain angle under the influence of gravity. Correspondingly, the second support arm 200 experiences a certain degree of bouncing, i.e., a nodding phenomenon. This nodding phenomenon affects the user experience. Using a damping hinge to overcome the nodding problem is costly, involves many parts, and is difficult to repair individually after a failure; often, the entire component needs to be replaced, thus increasing maintenance costs.

[0037] Therefore, this application provides a flipping mechanism and a flipping table including the flipping mechanism. By setting an elastic traction component in the flipping mechanism, a torque in a fixed direction is generated on the second support arm 200, so that the rotation trend of the second support arm 200 relative to the first support arm 100 remains unchanged, thereby eliminating the head-nodding phenomenon, improving the user experience, and at a lower cost.

[0038] Figure 5 This is a schematic diagram of a flip-up tabletop in one embodiment of this application; Figure 6 This is an exploded view of a flip-up tabletop in one embodiment of this application; Figure 7 for Figure 5 A cross-sectional view along the AA direction. (e.g.) Figures 5 to 7 As shown, the flip-up tabletop includes a flipping mechanism and a worktable 500 disposed on the flipping mechanism. The flipping mechanism includes a support arm assembly and an elastic traction assembly. The support arm assembly includes a first support arm 100 and a second support arm 200, the second support arm 200 being rotatably connected to the first support arm 100. The second support arm 200 is capable of rotating relative to the first support arm 100 in a first rotational direction and a second rotational direction, the first rotational direction being opposite to the second rotational direction. The worktable 500 is disposed on the second support arm 200. The elastic traction assembly is connected to the first support arm 100 and the second support arm 200, and provides torque to the second support arm 200 through its own elastic force, causing it to tend to rotate in the second direction. In this embodiment, the flipping mechanism also includes a drive assembly, the drive shaft 410 of which is drively connected to the second support arm 200, and the drive assembly is used to drive the second support arm 200 to rotate.

[0039] In this embodiment, the second support arm 200 has a first position and a second position during its rotational stroke relative to the first support arm 100. The second support arm 200 can rotate from the first position to the second position along a first rotational direction, or from the second position to the first position along a second rotational direction. In this embodiment, the ends of the first support arm 100 and the second support arm 200 are rotatably connected. Optionally, when the first support arm 100 is in the second position, the extension directions of the first support arm 100 and the second support arm 200 are approximately the same, and the support arm assembly is in a straight line shape; when the first support arm 100 is in the second position, the first support arm 100 is perpendicular to the second support arm 200. The center of gravity of the second support arm 200 and the cutting board 500 will rotate from one side to the other in the horizontal direction of the rotation axis of the second support arm 200 when the second support arm 200 rotates from the first position to the second position (or from the second position to the first position). In one application scenario, when the second arm 200 is in the first position, the flip-top tabletop can be stored; when the second arm 200 is in the second position, the workbench 500 is horizontal, and the flip-top tabletop can be used. It should be understood that in other optional embodiments, when the second arm 200 is in the second position, the first arm 100 and the second arm 200 may also form an obtuse angle or an acute angle.

[0040] In this embodiment, the elastic traction component provides a torque to the second arm 200 that rotates in the second direction. Furthermore, when the torque provided by the elastic traction component to the second arm 200 (hereinafter referred to as the elastic torque) is opposite to the gravitational torque of the second arm 200, the elastic torque can overcome the gravitational torque, ensuring that the resultant torque of the elastic torque and the gravitational torque always maintains the same direction, i.e., always the second direction of rotation. Therefore, by providing the elastic traction component, the nodding phenomenon caused by gravity and idle travel can be overcome.

[0041] In this embodiment, the elastic traction assembly includes a traction rope 300. The traction rope 300 is tensioned under the elastic force of the elastic traction assembly, causing the second arm 200 to tend to rotate along a second direction of rotation. Further, a winding portion 120 is provided on the first arm 100 or the second arm 200. The traction rope 300 is wound around the winding portion 120 and its extension direction is changed through the winding portion 120. In this embodiment, the contact surface 121 of the winding portion 120 is spaced apart from the rotation axis of the second arm 200. Therefore, after the traction rope 300 winds around the winding portion 120 and abuts against the contact surface 121, it is tensioned. The extension line of the tension on the traction rope 300 does not pass through the rotation axis, thus generating a torque relative to the rotation axis. This torque is the elastic torque applied by the elastic traction assembly to the second arm 200.

[0042] In this embodiment, the elastic traction assembly further includes an elastic element 310. The traction rope 300 is connected to the elastic element 310, which is connected to either the first support arm 100 or the second support arm 200. The elastic element 310 provides an elastic force to tension the traction rope 300. In this embodiment, the elastic force of the elastic traction assembly is provided by the elastic element 310, and the traction rope 300 is also able to be tensioned due to the elastic force of the elastic element 310. In this embodiment, the elastic element 310 is a tension spring; in other optional embodiments, the elastic element 310 can also be a rubber component or other elastic part.

[0043] Optionally, the winding portion 120 is disposed at the rotational connection between the first support arm 100 and the second support arm 200, i.e., the joint of the support arm assembly, with the rotation axis of the second support arm 200 passing through the winding portion 120. It can be understood that in this embodiment, the traction rope 300 in the elastic traction assembly is located near the joint of the support arm assembly and cooperates with the winding portion 120, while the elastic element 310 is located away from the shutdown portion of the support arm assembly relative to the traction rope 300. The traction rope 300 has a smaller size than the elastic element 310 (e.g., a tension spring), and its arrangement at the joint of the support arm assembly does not occupy too much space at the joint, leaving more space for other components (such as the drive assembly and its related transmission components). Therefore, the elastic traction assembly provided in this application embodiment, by winding the slender traction rope 300 around the winding portion 120, can reduce the space occupied at the joint of the support arm assembly. This is advantageous compared to the solution of using a torsion spring to provide elastic torque, because a torsion spring occupies more space in the extension direction of the rotation axis of the second support arm 200.

[0044] In this embodiment, the elastic element 310 is connected to the second support arm 200, the winding portion 120 is connected to the first support arm 100, one end of the traction rope 300 is connected to the elastic element 310, and the other end of the traction rope 300 is connected to the first support arm 100. Figures 5 to 7 As can be seen, even if the elastic element 310 has a large size, it can be located in the second support arm 200 while avoiding the joint portion of the support arm assembly. It should be understood that in other optional embodiments, the elastic element 310 can also be located in the first support arm 100, and the winding portion 120 can also be located in the second support arm 200; for example, the second support arm 200 is provided with a shaft, the axis of which coincides with the rotation axis of the second support arm 200, and the traction rope 300 abuts against the outer peripheral surface of the shaft, which serves as the abutment surface 121.

[0045] Alternatively, the traction rope 300 can be made of organic materials or metals, such as nylon or stainless steel. The traction rope 300 can be made of smooth threads or a chain.

[0046] In alternative embodiments, the elastic traction assembly may include two elastic elements 310, which are respectively connected to the two ends of the traction rope 300 and respectively connected to the first support arm 100 or the second support arm 200. Alternatively, the elastic traction assembly may not include the elastic elements 310, and the traction rope 300 itself may be elastic, for example, the traction rope 300 may be a rubber band.

[0047] In this embodiment, the first support arm 100 includes a first housing 101 and a first cover 102, which are fastened together to form a cavity. A drive assembly is disposed within the cavity between the first housing 101 and the first cover 102. Further, the second support arm 200 includes a second housing 201 and a second cover 202, which are fastened together to form a cavity. An elastic member 310 is disposed within the cavity between the second housing 201 and the second cover 202.

[0048] Figure 8 This is a first schematic diagram of the joint portion of the outrigger assembly in one embodiment of this application; Figure 9 This is a second schematic diagram of the joint portion of the outrigger assembly in one embodiment of this application. Figure 8 and Figure 9 As shown, the first support arm 100 includes two spaced-apart sidewalls 110, and the second support arm 200 includes two spaced-apart mating portions 210. The two sidewalls 110 are located between the two mating portions 210, and the rotation axis of the second support arm 200 passes through the two sidewalls 110 and the two mating portions 210. A winding portion 120 is disposed on one of the sidewalls 110. In this embodiment, the two mating portions 210 of the second support arm 200 can rotate relative to the two sidewalls 110 of the first support arm 100, and the second support arm 200 can be limited by the two sidewalls 110 in the extension direction of the rotation axis, thereby improving the reliability of the connection with the first support arm 100. In this embodiment, the drive shaft 410 of the drive assembly can pass through the sidewalls 110 and be drively connected to the second support arm 200, thereby driving the second support arm 200 to rotate.

[0049] In this embodiment, the winding portion 120 is disposed on the side of one sidewall 110 opposite to the other sidewall 110, that is, between one sidewall 110 and a mating portion 210. In this embodiment, there is only a narrow space between the sidewall 110 and the mating portion 210, and the slender traction rope 300 can fit into this narrow space and cooperate with the winding portion 120.

[0050] In this embodiment, the rotation axis of the second arm 200 passes through the winding portion 120, and the contact surface 121 of the winding portion 120 is an arc surface (i.e., a cylindrical surface) extending around the rotation axis of the second arm 200. By setting the contact surface 121 as an arc surface, the traction rope 300 can turn smoothly at the winding portion 120, having a larger contact area with the contact surface 121, avoiding excessive stress concentration on the traction rope 300 by the winding portion 120, thereby reducing the risk of the traction rope 300 breaking. The larger the distance between the contact surface 121 and the rotation axis (i.e., the radius of curvature of the contact surface 121 in this embodiment), the larger the contact area between the contact surface 121 and the traction rope 300, the less likely the traction rope 300 is to break due to stress concentration. Furthermore, the lever arm will be longer, and the elastic torque provided by the elastic traction component to the second arm 200 will be greater, which can better prevent the second arm 200 from jumping.

[0051] In this embodiment, a mounting groove 111 is provided on the side wall 110. The mounting groove 111 extends through the side wall 110 along the rotation axis and forms an opening at the edge of the side wall 110, through which the drive shaft 410 of the drive assembly can be inserted. Furthermore, the winding portion 120 has a clearance groove 122, which communicates with the mounting groove 111 in the extension direction of the rotation axis, allowing the drive shaft 410 of the drive assembly to pass through the clearance groove 122 and connect to the second support arm 200. In this embodiment, the clearance groove 122 also has an opening, and the opening of the clearance groove 122 faces the same direction as the opening of the mounting groove 111, allowing the drive shaft 410 to be inserted.

[0052] In this embodiment, the winding portion 120 is a boss structure on the side wall 110, with a cylindrical surface around the rotation axis as an abutment surface 121. In other embodiments, the structure of the winding portion 120 can be adjusted as needed. For example, the winding portion 120 can be a shaft provided on the first support arm 100, parallel and spaced from the rotation axis, with the traction rope 300 passing around and tensioned; as long as the winding portion 120 can provide a fulcrum for the traction rope 300 and enable the tensioned traction rope 300 to provide torque to the second support arm 200. Figure 10 This is a schematic diagram illustrating the arrangement of the winding portion 120 in another embodiment of this application. For example... Figure 10As shown, the winding section 120 is a column mounted on the first support arm 100 and parallel to the rotation axis of the second support arm 200 (point O in the figure). The traction rope 300 changes its extension direction by passing around the winding section 120. When the traction rope 300 is taut, it provides tension to the second support arm 200 (as shown by F in the figure). The extension direction of the traction rope 300 between the winding section 120 and the second support arm 200 is the direction of tension. The distance between this section of the traction rope 300 and the rotation axis O is the lever arm (as shown by L in the figure). Therefore, when the traction rope 300 is taut, it can generate torque on the second support arm 200. This torque drives the second support arm 200 along... Figure 10 The torque is F×L when it rotates clockwise.

[0053] Figure 11 This is a first installation diagram of the traction rope 300 in one embodiment of this application; Figure 12 This is a second installation schematic diagram of the traction rope 300 in one embodiment of this application. Figure 11 and Figure 12 As shown, in this embodiment, a notch 112 is provided on the edge of one sidewall 110 of the first support arm 100, and a limiting part 320 is provided at the end of the traction rope 300. The traction rope 300 is embedded in the notch 112, and the limiting part 320 abuts against the sidewall 110. Since the size of the limiting part 320 is larger than the width of the notch 112, when the traction rope 300 is tensioned, the limiting part 320 cannot pass through the notch 112, thereby fixing the end of the traction rope 300. In other optional embodiments, the end of the traction rope 300 can also be fixed to the first support arm 100 in other ways, such as by binding, fixing the end of the traction rope 300 to a hole or column on the first support arm 100; or, by using fasteners such as screws to fix the end of the traction rope 300.

[0054] Optionally, the second position of the second arm 200 can be one of the rotational limit positions of the second arm 200. In this case, optionally, at least one of the first arm 100 and the second arm 200 is provided with a stop 130, which prevents the second arm 200 from continuing to rotate in the first direction of rotation from the second position. Figure 11 and Figure 12In the illustrated embodiment, a stop 130 is disposed on the first support arm 100. When the second support arm 200 rotates from the first position to the second position along the first rotation direction, the stop 130 can abut against the second support arm 200, thereby preventing the second support arm 200 from continuing to rotate along the first rotation direction and stopping at the second position. At this time, the user can use the cutting board 500 on the second support arm 200. Optionally, a mechanical limit switch or proximity switch is disposed on the first support arm 100. When the stop 130 abuts against the second support arm 200, the mechanical limit switch or proximity switch is triggered, and the drive component stops driving according to the trigger signal; or, the current value of the drive component (specifically the motor 400) is monitored in real time. When the current value exceeds a preset stall current threshold for a continuous period of time, it is determined that the second support arm 200 has abutted against the stop 130, and the drive component stops driving at this time.

[0055] Figure 13 This is a schematic diagram of the second arm 200 after it has rotated to the second position in one embodiment of this application. Figure 13 As shown, when the second support arm 200 rotates to the second position, the first support arm 100 is perpendicular to the second support arm 200. When the first support arm 100 is vertically positioned, the second support arm 200 and the cutting board 500 can be horizontal for user use. Optionally, the first position of the second support arm 200 can also be another rotational limit position of the second support arm 200. Similarly, a blocking structure can be provided to limit the second support arm 200 from continuing to rotate in the second direction from the first position.

[0056] exist Figure 5 and Figure 6 In the illustrated embodiment, the drive assembly includes a motor 400, the output shaft of which is drively connected to the second arm 200. In other words, in... Figure 5 and Figure 6 In this embodiment, the second arm 200 is directly driven by the motor 400, and the output shaft of the motor 400 is the drive shaft 410 of the drive assembly. This drive assembly has high transmission efficiency, good reliability, and a small overall size. However, it requires the axis of the output shaft of the motor 400 to coincide with the rotation axis of the second arm 200, which limits the flexibility in selecting the installation position of the motor 400.

[0057] Figure 14 This is a schematic diagram of a flip-up tabletop in another embodiment of this application; Figure 15 This is an exploded view of a flip-up tabletop according to another embodiment of this application. Figure 14 and Figure 15As shown, in an optional embodiment, the drive assembly includes a motor 400 and a gear set, with the output shaft of the motor 400 connected to the second support arm 200 via the gear set. The gear set transmits torque, changing the direction of rotation, allowing the output shaft of the motor 400 and the rotation axis of the second support arm 200 to be non-coincident and non-parallel, thus improving the flexibility of the motor 400's placement.

[0058] Optionally, such as Figure 14 , 15 As shown, the output shaft of the motor 400 is perpendicular to the rotation axis of the second support arm 200. The gear set includes a first gear 420 and a second gear 430, which are two meshing bevel gears. The second gear 430 is connected to the second support arm 200 via a drive shaft 410. Figure 14 , Figure 15 In the embodiment shown, a motor bracket 440 is also provided between the first housing 101 and the first cover 102 of the first arm 100 for fixing the motor 400.

[0059] It should be understood that, in alternative embodiments, the flipping mechanism may not include a drive assembly driven by the motor 400, but instead the second arm 200 may be driven to rotate manually.

[0060] The flip-up table provided in this application embodiment can be applied to vehicles, such as being installed next to the seats. In one application scenario, when the flip-up table is not in use, the second arm 200 is in the first position and can be stored in the armrest box; when the flip-up table needs to be used, it can be taken out of the armrest box, and then the drive assembly is controlled to flip the second arm 200 to a horizontal position, after which the passenger can use the table 500.

[0061] Figure 16 This is a schematic diagram of a flip-up tabletop in another embodiment of this application; Figures 17 to 20 This is a schematic diagram illustrating the various stages of the unfolding process of the flip-up tabletop in one embodiment. Figures 16 to 20As shown, in an optional embodiment, the driving assembly includes a first motor and a second motor (not shown in the figure), and the flipping mechanism also includes a base 600. The first arm 100 is rotatably connected to the base 600, and the output shaft of the first motor is driveably connected to the first arm 100. The first motor drives the first arm 100 to rotate relative to the base 600. The output shaft of the second motor is driveably connected to the second arm 200, and the second motor drives the second arm 200 to rotate relative to the first arm 100. Specifically, the first motor can be fixed to the base 600, and the output shaft of the first motor can be directly connected to the first arm 100, or it can be driven by a gear or other transmission component. The configuration of the second motor can refer to the motor 400 in the aforementioned embodiment, and will not be repeated here.

[0062] In this embodiment, the rotation axis of the first arm 100 is perpendicular to the rotation axis of the second arm 200.

[0063] In this embodiment, the flip-top table includes two cutting boards 500, allowing simultaneous use by two users. Therefore, the base 600 is equipped with two first motors, each driving one of the two first support arms to rotate. In other embodiments, the flip-top table may include only one cutting board 500.

[0064] In practical use cases, when the flip-top table is in an idle, stored state, such as Figure 17 As shown. The flip-up table can then be stored in the car's armrest compartment. When needed, the first motor can be used to drive the first support arm 100 to the upright position, as shown. Figure 18 As shown; then the second motor is used to drive the second arm 200 to a horizontal position, as shown. Figure 19 As shown; then unfold the cutting board 500 (it can be electrically driven or manually), as shown. Figure 20 As shown. After this, the user can then use the cutting board 500.

[0065] It should be understood that the flipping mechanism provided in this application can be applied not only to flip-up tables, but also to other devices that require a flipping mechanism, such as flip-up chairs.

[0066] In summary, this application provides a tilting mechanism, including a support arm assembly and an elastic traction assembly. The support arm assembly includes a first support arm 100 and a second support arm 200, with the second support arm 200 rotatably connected to the first support arm 100. The second support arm 200 is capable of rotating relative to the first support arm 100 in a first rotational direction and a second rotational direction, the first rotational direction being opposite to the second rotational direction. The elastic traction assembly is connected to the first support arm 100 and the second support arm 200, and includes a traction rope 300. The traction rope 300 is tensioned under the elastic force of the elastic traction assembly, causing the second support arm 200 to tend to rotate along the second rotational direction. By providing the elastic traction assembly, the tensioned traction rope 300 can provide a torque along the second rotational direction to the second support arm 200. This torque is greater than the torque provided by the gravity of the second support arm 200, so that even if the direction of the gravitational torque changes when the center of gravity of the second support arm 200 passes directly above the rotation axis, the direction of the total torque provided by gravity and the elastic traction assembly will not change. In this situation, the second arm 200 will not be affected by the free travel and the change in the direction of the gravitational torque, resulting in sudden acceleration and rotation. Therefore, the nodding phenomenon can be eliminated, thereby improving the user experience.

[0067] This application also provides a flip-up tabletop, including a cutting board 500 and the aforementioned flipping mechanism, with the cutting board 500 connected to the second support arm 200. In this application, the second support arm 200 and the cutting board 500 of the flip-up tabletop do not exhibit any nodding phenomenon, resulting in a better user experience.

[0068] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A flipping mechanism, characterized in that, include: The arm assembly includes a first arm (100) and a second arm (200), the second arm (200) being rotatably connected to the first arm (100), and the second arm (200) being rotatable relative to the first arm (100) in a first rotation direction and a second rotation direction, the first rotation direction being opposite to the second rotation direction; An elastic traction assembly is connected to the first arm (100) and the second arm (200). The elastic traction assembly includes a traction rope (300), which is tensioned under the elastic force of the elastic traction assembly to give the second arm (200) a tendency to rotate along the second direction of rotation.

2. The flipping mechanism according to claim 1, characterized in that, The first arm (100) or the second arm (200) is provided with a winding part (120), and the traction rope (300) is wound around the winding part (120) and changes its extension direction through the winding part (120).

3. The flipping mechanism according to claim 2, characterized in that, The winding portion (120) has an abutment surface (121), which is an arc surface extending about the rotation axis of the second arm (200).

4. The flipping mechanism according to claim 2, characterized in that, The rotation axis of the second arm (200) passes through the winding portion (120), or the winding portion (120) is spaced apart from the rotation axis of the second arm (200).

5. The flipping mechanism according to claim 2, characterized in that, The first arm (100) includes two sidewalls (110) spaced apart, and the second arm (200) includes two mating parts (210) spaced apart. The two sidewalls (110) are located between the two mating parts (210). The rotation axis of the second arm (200) passes through the two sidewalls (110) and the two mating parts (210). The winding part (120) is disposed on one of the sidewalls (110).

6. The flipping mechanism according to claim 5, characterized in that, The winding portion (120) is disposed on one side of one of the sidewalls (110) away from the other sidewall (110).

7. The flipping mechanism according to claim 5, characterized in that, One of the sidewalls (110) has a notch (112) on its edge, and the end of the traction rope (300) has a limiting part (320). The traction rope (300) is inserted into the notch (112), and the limiting part (320) abuts against the sidewall (110).

8. The flipping mechanism according to claim 1, characterized in that, The elastic traction assembly further includes an elastic element (310), to which the traction rope (300) is connected. The elastic element (310) is connected to the first support arm (100) or the second support arm (200). The elastic element (310) is used to provide an elastic force to tension the traction rope (300).

9. The flipping mechanism according to claim 8, characterized in that, The elastic element (310) is connected to the second support arm (200), one end of the traction rope (300) is connected to the elastic element (310), and the other end of the traction rope (300) is connected to the first support arm (100).

10. The flipping mechanism according to claim 8, characterized in that, The elastic element (310) is a tension spring.

11. The flipping mechanism according to claim 1, characterized in that, The traction rope (300) is an elastic rope, and the two ends of the traction rope (300) are respectively connected to the first support arm (100) and the second support arm (200).

12. The flipping mechanism according to claim 1, characterized in that, The flipping mechanism further includes a drive assembly, the drive shaft (410) of which is connected to the second arm (200) for transmission, and the drive assembly is used to drive the second arm (200) to rotate.

13. The flipping mechanism according to claim 12, characterized in that, The first arm (100) or the second arm (200) is provided with a winding part (120), the traction rope (300) is wound around the winding part (120) and changes its extension direction through the winding part (120), the winding part (120) has a clearance groove (122), the drive shaft (410) of the drive assembly passes through the clearance groove (122) and is connected to the second arm (200).

14. The flipping mechanism according to claim 12, characterized in that, The drive assembly includes a motor (400), the output shaft of which is connected to the second arm (200) in a transmission manner.

15. The flipping mechanism according to claim 12, characterized in that, The drive assembly includes a motor (400) and a gear set, wherein the output shaft of the motor (400) is connected to the second support arm (200) via the gear set.

16. The flipping mechanism according to claim 15, characterized in that, The output shaft of the motor (400) is perpendicular to the rotation axis of the second support arm (200). The gear set includes a first gear (420) and a second gear (430), wherein the first gear (420) and the second gear (430) are two bevel gears that mesh with each other.

17. The flipping mechanism according to any one of claims 1-16, characterized in that, The second arm (200) has a first position and a second position during its rotational stroke relative to the first arm (100). The second arm (200) is capable of rotating from the first position to the second position along the first rotational direction, or rotating from the second position to the first position along the second rotational direction. At least one of the first arm (100) and the second arm (200) is provided with a stop (130) for preventing the second arm (200) from continuing to rotate along the first rotational direction from the second position.

18. The flipping mechanism according to claim 17, characterized in that, When the second arm (200) is in the second position, the first arm (100) is perpendicular to the second arm (200).

19. The flipping mechanism according to claim 12, characterized in that, The drive assembly includes a first motor and a second motor. The flipping mechanism also includes a base (600). The first support arm is rotatably connected to the base (600). The output shaft of the first motor is driven to the first support arm (100). The first motor is used to drive the first support arm (100) to rotate relative to the base (600). The output shaft of the second motor is driven to the second support arm (200). The second motor is used to drive the second support arm (200) to rotate relative to the first support arm (100).

20. The flipping mechanism according to claim 19, characterized in that, The rotation axis of the first arm (100) is perpendicular to the rotation axis of the second arm (200).

21. A flip-up tabletop, characterized in that, It includes a cutting board (500) and a flipping mechanism according to any one of claims 1-20, wherein the cutting board (500) is connected to the second support arm (200).

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