Turnover mechanism and table board device thereof

Abstract

The utility model discloses a turnover mechanism and a table board device thereof, the turnover mechanism comprises: a connecting rod assembly, the connecting rod assembly is used for connecting a movable part and a fixed part so as to enable the movable part to turn over between a folding position and an opening position relative to the fixed part, and the movable part is provided with an accommodating groove; one end of the shielding assembly is movably connected to the connecting rod assembly, the other end of the shielding assembly is movably connected to the movable part, and the connecting rod assembly can drive the shielding assembly to move relative to the movable part; when the movable part is located at the folding position, the connecting rod assembly and the shielding assembly are folded and drawn close, and the shielding assembly is contained in the containing groove of the movable part. When the movable part is in the opening position, the connecting rod assembly and the shielding assembly are unfolded, at least part of the connecting rod assembly and the shielding assembly can shield the containing groove, and foreign matter can be prevented from falling into the containing groove.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, and in particular to a flipping mechanism and its table device. Background Technology

[0002] With the development of the automotive industry, the installation of table devices behind car seats has become increasingly common. These table devices provide rear passengers with a temporary desktop for work, dining, and other purposes. When not in use, the table devices can be folded down and placed close to the front seatbacks, reducing space occupation and leaving ample room for rear passengers to move around.

[0003] However, in the related technology, when the tabletop device is opened, there is a gap between the flipping mechanism and the tabletop, which not only affects the normal use of the tabletop, but also makes it difficult to clean when foreign objects fall into the gap. Utility Model Content

[0004] One objective of this invention is to provide a flipping mechanism that allows a movable part to flip relative to a fixed part, and when the movable part is in the open position, the receiving groove on the movable part is covered.

[0005] Another objective of this invention is to provide a tabletop device having the aforementioned flipping mechanism.

[0006] To achieve at least one of the above objectives, the present invention adopts the following technical solution: a flipping mechanism, comprising: a linkage assembly connecting a movable member and a fixed member, such that the movable member flips relative to the fixed member between a folded position and an open position, the movable member having a receiving groove; and a blocking assembly, one end of which is hinged to a first linkage, the other end of which is movably connected to the movable member, the first linkage driving the blocking assembly to move relative to the movable member; when the movable member is in the folded position, the first linkage and the blocking assembly fold and approach each other, the blocking assembly being accommodated within the receiving groove of the movable member; when the movable member is in the open position, the first linkage and the blocking assembly unfold, at least a portion of the first linkage and the blocking assembly blocking the receiving groove.

[0007] As a preferred embodiment, the linkage assembly includes a first linkage, one end of which is hinged to the fixed member, and the other end of which is hinged to the movable member; the shielding assembly includes a first shielding member and a second shielding member, the first shielding member having a first end and a second end disposed opposite to each other, and the second shielding member having a third end and a fourth end disposed opposite to each other, wherein the first end is hinged to the first linkage, the second end is hinged to the third end, and the fourth end is hinged to the movable member; when the movable member is in the folded position, the first linkage and the second shielding member are folded together and close to the same side of the first shielding member; when the movable member is in the open position, the first linkage, the first shielding member, and the second shielding member are unfolded to shield the receiving groove.

[0008] As a preferred embodiment, the first link includes a connecting section, a blocking section, and a first receiving section arranged sequentially. The connecting section and the first receiving section extend to opposite sides of the blocking section. The connecting section is hinged to the fixed member, the first receiving section is hinged to the movable member, and the first end of the first blocking member is hinged to the first receiving section. The first link can drive the first blocking member to move relative to the movable member. The first receiving section has a first receiving groove with an opening facing the first blocking member. When the movable member is in the open position, the blocking section can cover the receiving groove, and the first receiving section is accommodated in the receiving groove. A portion of the first blocking member is located above the first receiving section, thus covering the first receiving section. When the movable member is in the folded position, the first link and the first blocking member fold together, and a portion of the first blocking member is accommodated in the first receiving groove.

[0009] As a preferred embodiment, the first receiving section includes a main body and a connecting portion. The main body extends curvedly from the blocking section to form the first receiving groove. The end of the main body away from the blocking section has a first hinge structure for hinged connection with the movable member. The connecting portion is connected to the end of the main body away from the blocking section and extends toward the blocking section. The end of the connecting portion away from the main body has a second hinge structure for hinged connection with the first blocking member. When the movable member is in the folded position, a portion of the first blocking member is accommodated in the first receiving groove and abuts against the connecting portion.

[0010] As a preferred embodiment, the first shielding member includes a first branch segment and a main segment connected in sequence. A fifth hinge structure is provided between the first branch segment and the main segment, so as to be hinged with the second hinge structure of the first connecting rod. A first rotation axis is defined between the fifth hinge structure and the second hinge structure. The distance from the end of the first branch segment away from the main segment to the first rotation axis is denoted as L1. At least a portion of the wall of the first receiving groove is arc-shaped, and the center of the first virtual circle is located at the first rotation axis. The radius of the first virtual circle is denoted as R1, where R1 > L1.

[0011] As a preferred embodiment, the second shielding member includes a connected covering section and a second receiving section. The end of the covering section away from the second receiving section has a third hinge structure, which is hinged to the movable member. The second receiving section is hinged to the second end of the first shielding member. The first shielding member can drive the second shielding member to move relative to the movable member. The second receiving section has a second receiving groove with an opening facing the first shielding member. When the movable member is in the open position, the covering section can cover the receiving groove, and a portion of the first shielding member is located above the receiving section, thus covering the receiving section. When the movable member is in the folded position, the first shielding member and the second shielding member fold and close together, and a portion of the first shielding member is accommodated in the second receiving groove, and the second shielding member is accommodated in the receiving groove.

[0012] As a preferred embodiment, the second receiving section includes a base portion and an extension portion. The base portion extends curvedly from the covering section to form the second receiving groove. The extension portion is connected to one end of the base portion away from the covering section and extends toward the covering section. The end of the extension portion away from the base portion has a fourth hinge structure so as to be hinged to the first blocking member. When the movable member is in the folded position, a portion of the first blocking member is accommodated in the second receiving groove so as to approach the extension portion.

[0013] As a preferred embodiment, the first shielding member includes a main section and a second branch section connected in sequence. A sixth hinge structure is provided between the main section and the second branch section, which can be hinged to the fourth hinge structure of the second shielding member. A second rotation axis is defined between the sixth hinge structure and the fourth hinge structure. The distance from the end of the second branch section away from the main section to the first rotation axis is denoted as L2. At least a portion of the wall of the second receiving groove is arc-shaped, and the center of the second virtual circle is located at the second rotation axis. The radius of the second virtual circle is denoted as R2, where R2 > L2.

[0014] As a preferred embodiment, the first shielding member includes a first branch, a main branch, and a second branch arranged sequentially. The length of the first branch is denoted as X1, the length of the main branch is denoted as X2, and the length of the second branch is denoted as X3, wherein X2 > X1 > X3.

[0015] To achieve at least one of the above objectives, the technical solution adopted by this utility model is as follows: a tabletop device, comprising: a tabletop having opposing first and second sides; at least two flipping mechanisms as described above, wherein a movable member of one flipping mechanism is fixed to the first side of the tabletop, and a movable member of the other flipping mechanism is fixed to the second side of the tabletop; the fixing member of the flipping mechanism is adapted to be fixed at the installation location, so that the tabletop is folded or opened opposite the installation location.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] When the movable part is in the folded position, the shielding assembly can fold and approach the linkage assembly, and the shielding assembly is accommodated in the receiving groove, so that the structure of the flipping mechanism is more compact; when the movable part is in the open position, at least part of the linkage assembly and the shielding assembly can cover the receiving groove, which helps to prevent foreign objects from falling into the receiving groove. Attached Figure Description

[0018] Figure 1 This is a side view of a tabletop device in a folded state according to some embodiments of this application.

[0019] Figure 2 This is an exploded view of a tabletop device in the open state according to some embodiments of this application.

[0020] Figure 3 This is a schematic diagram of a flipping mechanism according to other embodiments of this application with the movable part in a folded position and an open position.

[0021] Figure 4 This is a perspective view of the flipping mechanism according to some embodiments of this application with the movable part in the folded position.

[0022] Figure 5 This is a side view of the flipping mechanism according to some embodiments of this application with the movable part in the folded position.

[0023] Figure 6 This is a side view of the first link and the blocking assembly in the folded position according to some embodiments of this application.

[0024] Figure 7 This is a schematic diagram of the trajectory of the first link and the blocking assembly in the folded position according to some embodiments of this application.

[0025] Figure 8 This is a perspective view of the flipping mechanism according to some embodiments of this application with the movable part in the open position.

[0026] Figure 9 This is a side view of a flipping mechanism according to some embodiments of this application with the movable part in the open position.

[0027] Figure 10 This is a side view of the first link and the blocking assembly in the open position according to some embodiments of this application.

[0028] Figure 11 This is a schematic diagram of the trajectory of the first link and the blocking component in the open position according to some embodiments of this application.

[0029] Figure 12 This is a side view of the first link according to some embodiments of this application.

[0030] Figure 13 This is a side view of a first shielding member according to some embodiments of this application.

[0031] Figure 14 This is a side view of a second shielding member according to some embodiments of this application.

[0032] In the figure: 1. Flipping mechanism; 10. Linkage assembly; 11. First link; 111. First fixed end; 112. First movable end; 113. Connecting section; 114. Covering section; 115. First receiving section; 1151. First receiving groove; 1152. Main body; 1153. First hinge structure; 1154. Connecting part; 1155. Second hinge structure; 12. Second link; 121. Second fixed end; 122. Second movable end; 20. Covering assembly; 21. First cover; 211. First end; 212. Second end; 213. First support section; 2 14. Main section; 215. Second branch section; 216. Fifth hinge structure; 217. Sixth hinge structure; 22. Second shielding member; 221. Third end; 222. Fourth end; 223. Covering section; 224. Third hinge structure; 225. Second receiving section; 2251. Second receiving groove; 2252. Base part; 2253. Extension part; 2254. Fourth hinge structure; 30. Fixing member; 40. Moving part; 41. Receiving groove; 2. Tabletop device; 50. Tabletop; 51. First side part; 52. Second side part; 53. Outer shell; 54. Mounting frame. Detailed Implementation

[0033] The present invention will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. They should not be construed as limiting the specific protection scope of this utility model.

[0035] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0036] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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, a contact connection, or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] A flipping mechanism 1, such as Figures 1-14As shown, the mechanism includes a linkage assembly 10 and a blocking assembly 20. The linkage assembly 10 connects the movable member 40 and the fixed member 30, allowing the movable member 40 to flip relative to the fixed member 30 between a folded position and an open position. Furthermore, the movable member 40 has a receiving groove 41. One end of the blocking assembly 20 is movably connected to the linkage assembly 10, and the other end is movably connected to the movable member 40, allowing the linkage assembly 10 to drive the blocking assembly 20 to move relative to the movable member 40. Thus, when the movable member 40 is in the folded position, the linkage assembly 10 and the blocking assembly 20 fold together, and the blocking assembly 20 is housed within the receiving groove 41 of the movable member 40, making the structure of the flipping mechanism 1 more compact. When the movable part 40 is in the open position, the linkage assembly 10 and the blocking assembly 20 are unfolded, and at least part of the linkage assembly 10 and the blocking assembly 20 can cover the receiving groove 41, which helps to prevent foreign objects from falling into the receiving groove 41 and reduces the risk that the flipping mechanism 1 will be stuck or even unable to be used normally due to foreign objects falling in.

[0039] In some embodiments, such as Figures 4-14 As shown, the linkage assembly 10 includes a first link 11, one end of which is hinged to the fixed member 30, and the other end of which is hinged to the movable member 40, so that the movable member 40 is adapted to rotate relative to the fixed member 30 between a folded position and an open position. Further, the blocking assembly 20 includes a first blocking member 21 and a second blocking member 22. The first blocking member 21 has a first end 211 and a second end 212 disposed opposite to each other, and the second blocking member 22 has a third end 221 and a fourth end 222 disposed opposite to each other. The first end 211 is hinged to the first link 11, the second end 212 is hinged to the third end 221, and the fourth end 222 is hinged to the movable member 40. That is, the first link 11 is adapted to rotate relative to the movable member 40, and the second blocking member 22 is also adapted to rotate relative to the movable member 40. The first blocking member 21 is connected between the first link 11 and the second blocking member 22 to be adapted to rotate and / or translate relative to the movable member 40.

[0040] Specifically, such as Figures 4-7 As shown, when the movable part 40 is in the folded position, the first connecting rod 11 and the second blocking member 22 are folded and close together on the same side of the first blocking member 21. Specifically, the first blocking member 21 and the second blocking member 22 are accommodated in the receiving groove 41, with the first connecting rod 11 and the second blocking member 22 folded and close together on the side of the first blocking member 21 facing the fixing member 30, and the second blocking member 22 located between the first connecting rod 11 and the second blocking member 22. It should be understood that, compared to the first connecting rod 11 and the second blocking member 22 being folded and close together on opposite sides of the first blocking member 21 respectively, in this embodiment, the first connecting rod 11 and the second blocking member 22 being folded and close together on the same side of the first blocking member 21 helps to reduce the depth of the receiving groove 41.

[0041] like Figures 8-11 As shown, when the movable part 40 is in the open position, the first connecting rod 11, the first blocking member 21, and the second blocking member 22 unfold to cover the receiving groove 41. That is, at least a portion of the first connecting rod 11, the first blocking member 21, and the second blocking member 22 are arranged sequentially in the receiving groove 41, and the upper surfaces of at least a portion of the first connecting rod 11, the first blocking member 21, and the second blocking member 22 are all flush with or nearly flush with the upper surface of the movable part 40, which helps to prevent foreign objects from falling into the receiving groove 41.

[0042] In some embodiments, such as Figures 4-12 As shown, the first link 11 includes a first fixed end 111 and a first movable end 112 disposed opposite to each other, wherein the first fixed end 111 is hinged to the fixing member 30, and the first movable end 112 is hinged to the movable member 40. Further, the first link 11 from the first fixed end 111 to the first movable end 112 includes a connecting section 113, a blocking section 114, and a first receiving section 115 disposed sequentially. The connecting section 113 and the first receiving section 115 extend to opposite sides of the blocking section 114, respectively. The connecting section 113 is hinged to the fixing member 30, and the first receiving section 115 is hinged to the movable member 40, so that when the movable member 40 is in the open position, the movable member 40 is disposed at an angle to the fixing member 30; when the movable member 40 is in the folded position, the movable member 40 is disposed parallel to or nearly parallel to the fixing member 30. The first end 211 of the first blocking member 21 is hinged to the first receiving section 115, so that the first link 11 can drive the first blocking member 21 to move relative to the movable member 40.

[0043] Furthermore, the first receiving section 115 has a first receiving groove 1151 with an opening facing the first blocking member 21. When the movable member 40 is in the open position, such as Figures 4-7 As shown, the blocking section 114 covers the receiving groove 41; the connecting section 113 extends from the blocking section 114 toward the fixing member 30 and is hinged to the fixing member 30; the first receiving section 115 is housed in the receiving groove 41, and a portion of the first blocking member 21 is located above the first receiving section 115, thus covering the first receiving section 115. It should be understood that a portion of the first blocking member 21 is located at the opening of the first receiving groove 1151, such that the upper surface of the first blocking member 21 is flush with or nearly flush with the upper surface of the blocking section 114 of the first connecting rod 11, thereby covering the receiving groove 41 and reducing the gap between the blocking section 114 of the first connecting rod 11 and the first blocking member 21.

[0044] When the movable part 40 is in the folded position, such as Figures 8-11As shown, the first connecting rod 11 and the first blocking member 21 are folded together, and a portion of the first blocking member 21 is accommodated in the first receiving groove 1151. That is, during the process of the movable member 40 flipping from the open position to the folded position, a portion of the first blocking member 21 is adapted to move from the opening of the first receiving groove 1151 into the first receiving groove 1151, and at the same time, the first blocking member 21 moves from the opening of the receiving groove 41 to the bottom of the receiving groove 41, until the movable member 40 is in the folded position, at which point a portion of the first blocking member 21 is accommodated at the bottom of the first receiving groove 1151, and the first blocking member 21 is accommodated in the receiving groove 41. This makes the structure between the first connecting rod 11, the first blocking member 21 and the movable member 40 more compact, which is conducive to the movable member 40 moving closer to the fixed member 30 and reducing the distance between the movable member 40 and the fixed member 30.

[0045] In some embodiments, such as Figure 6 , Figure 10 and Figure 12 As shown, the first receiving section 115 includes a main body 1152 and a connecting portion 1154. The main body 1152 extends and bends from the blocking section 114 to form a first receiving groove 1151. The end of the main body 1152 away from the blocking section 114 has a first hinge structure 1153, which can be hinged to the movable member 40. Furthermore, the connecting portion 1154 is connected to the end of the main body 1152 away from the blocking section 114 and extends toward the blocking section 114. The end of the connecting portion 1154 away from the main body 1152 has a second hinge structure 1155, which can be hinged to the first blocking member 21.

[0046] This should be understandable, such as Figure 10 As shown, the main body 1152 extends downward from the blocking section 114 toward the first blocking member 21, and the connecting part 1154 extends toward the blocking section 114, so that the second hinge structure 1155 is positioned close to the opening of the first receiving groove 1151. Thus, when the movable member 40 is in the open position, the first receiving section 115 is accommodated in the receiving groove 41, and part of the first blocking member 21 covers the opening of the first receiving groove 1151, i.e., covers the receiving groove 41, thereby reducing the gap between the blocking section 114 of the first connecting rod 11 and the first blocking member 21. When the movable member 40 is in the folded position, as... Figure 5 and Figure 6 As shown, a portion of the first shield 21 is housed in the first receiving groove 1151, allowing it to approach the connecting portion 1154. At the same time, at least a portion of the first shield 21 and the first receiving section 115 are housed in the receiving groove 41, which facilitates the moving part 40 to be closer to the fixed part 30.

[0047] In some embodiments, such as Figure 6 and Figure 10As shown, the first blocking member 21 includes a first branch segment 213 and a main branch segment 214 connected in sequence. A fifth hinge structure 216 is provided between the first branch segment 213 and the main branch segment 214, so as to be hinged to the second hinge structure 1155 of the first connecting rod 11. In at least one embodiment, both the second hinge structure 1155 and the fifth hinge structure 216 are implemented as holes and connected by a pivot pin, thereby reducing the processing difficulty of the first blocking member 21 and the first connecting rod 11, and reducing the production cost of the flipping mechanism 1.

[0048] Furthermore, such as Figure 7 and Figure 11 As shown, the first axis of rotation is defined between the fifth hinge structure 216 and the second hinge structure 1155. It should be understood that when the first link 11 rotates relative to the movable member 40, the first axis of rotation moves along the virtual circle O4 in the figure, while the first segment 213 of the first blocking member 21 rotates about the first axis of rotation. Figure 13 As shown, the distance from the end of the first branch 213 furthest from the main branch 214 to the first axis of rotation is denoted as L1; Figure 11 As shown, at least a portion of the wall of the first receiving groove 1151 is arc-shaped, and the center of the first virtual circle O1 is located on the first rotation axis. The radius of the first virtual circle O1 is denoted as R1, where R1 > L1. This helps to avoid interference between the first branch 213 and the wall of the first receiving groove 1151, thereby allowing the first branch 213 to move smoothly within the first receiving groove 1151.

[0049] In some embodiments, such as Figures 4-11 ,as well as Figure 14 As shown, the second blocking member 22 includes a covered section 223 and a receiving section 225 connected together. The end of the covered section 223 away from the second receiving section 225 has a third hinge structure 224, allowing it to be hinged to the movable member 40. Furthermore, the second receiving section 225 is hinged to the second end 212 of the first blocking member 21, thereby allowing the first blocking member 21 to drive the second blocking member 22 to move relative to the movable member 40.

[0050] Furthermore, the second receiving section 225 has a second receiving groove 2251 with an opening facing the first blocking member 21. When the movable member 40 is in the open position, such as Figures 4-7 As shown, the covering section 223 covers the receiving groove 41; a portion of the first blocking member 21 is located above the second receiving section 225, thus covering the second receiving section 225. It should be understood that a portion of the first blocking member 21 is located at the opening of the second receiving groove 2251, such that the upper surface of the first blocking member 21 is flush with or nearly flush with the upper surface of the covering section 223 of the second blocking member 22, thereby covering the receiving groove 41 and reducing the gap between the covering sections 223 of the first blocking member 21 and the second blocking member 22.

[0051] When the movable part 40 is in the folded position, such as Figures 8-11 As shown, the first shield 21 and the second shield 22 are folded together, with a portion of the first shield 21 being housed in the second receiving groove 2251 and the second shield 22 being housed in the receiving groove 41. In other words, during the process of the movable part 40 flipping from the open position to the folded position, a portion of the first blocking member 21 is adapted to move from the opening of the second receiving groove 2251 into the second receiving groove 2251. At the same time, the first blocking member 21 moves from the opening of the receiving groove 41 to the bottom of the receiving groove 41, and the second blocking member 22 rotates around the third hinge structure 224 from the opening of the receiving groove 41 to the bottom of the receiving groove 41. Until the movable part 40 is in the folded position, a portion of the first blocking member 21 is accommodated at the bottom of the second receiving groove 2251. Both the first blocking member 21 and the second blocking member 22 are accommodated in the receiving groove 41, making the structure between the first blocking member 21, the second blocking member 22 and the movable part 40 more compact, which is conducive to the movable part 40 moving closer to the fixed member 30 and reducing the distance between the movable part 40 and the fixed member 30.

[0052] In some embodiments, such as Figure 6 , Figure 10 and Figure 14 As shown, the second receiving section 225 includes a base portion 2252 and an extension portion 2253. The base portion 2252 extends bently from the covering section 223 to form a second receiving groove 2251. Furthermore, the extension portion 2253 is connected to one end of the base portion 2252 away from the covering section 223 and extends toward the covering section 223. The end of the extension portion 2253 away from the base portion 2252 has a fourth hinge structure 2254, allowing it to be hinged to the first blocking member 21.

[0053] This should be understandable, such as Figure 10 As shown, the base portion 2252 bends and extends downward from the covering section 223 toward the lower part of the first blocking member 21. The extension portion 2253 extends toward the covering section 223, such that the fourth hinge structure 2254 is located at the opening of the second receiving groove 2251. Therefore, when the movable member 40 is in the open position, the second receiving section 225 is accommodated in the receiving groove 41, and part of the first blocking member 21 covers the opening of the second receiving groove 2251, i.e., covers the receiving groove 41, thereby reducing the gap between the covering sections 223 of the first blocking member 21 and the second blocking member 22. When the movable member 40 is in the folded position, as... Figure 5 and Figure 6 As shown, part of the first shield 21 is housed in the second receiving groove 2251, so that it can approach the extension 2253. At the same time, the first shield 21 and the second shield 22 are housed in the receiving groove 41, so that the movable member 40 is closer to the fixed member 30.

[0054] In some embodiments, such as Figure 6 and Figure 10 As shown, the first blocking member 21 includes a main section 214 and a second branch section 215 connected in sequence. A sixth hinge structure 217 is provided between the main section 214 and the second branch section 215, so as to be hinged to the fourth hinge structure 2254 of the second blocking member 22. In at least one embodiment, both the fourth hinge structure 2254 and the sixth hinge structure 217 are implemented as holes and connected by a pivot pin, thereby reducing the processing difficulty of the first blocking member 21 and the second blocking member 22, and reducing the production cost of the flipping mechanism 1.

[0055] Furthermore, such as Figure 7 and Figure 11 As shown, the second axis of rotation is defined between the sixth hinge structure 217 and the fourth hinge structure 2254. It should be understood that when the second blocking member 22 rotates relative to the movable member 40, the second axis of rotation moves along the virtual circle O5 in the figure, while the second segment 215 of the first blocking member 21 rotates about the second axis of rotation. Figure 13 As shown, the distance from the end of the second branch 215 furthest from the main branch 214 to the first axis of rotation is denoted as L2; Figure 11 As shown, at least a portion of the wall of the second receiving groove 2251 is arc-shaped, and the center of the second virtual circle O2 is located on the second rotation axis. The radius of the second virtual circle O2 is denoted as R2, where R2 > L2. This helps to avoid interference between the second branch 215 and the wall of the second receiving groove 2251, thereby allowing the second branch 215 to move smoothly within the second receiving groove 2251.

[0056] In some embodiments, such as Figure 13 As shown, the first shielding member 21 includes a first branch 213, a main branch 214, and a second branch 215 arranged sequentially. The length of the first branch 213 is denoted as X1, the length of the main branch 214 is denoted as X2, and the length of the second branch 215 is denoted as X3, where X2 > X1 > X3. It should be understood that the main branch 214 is longer, while the first branch 213 and the second branch 215 are shorter. This helps to avoid the first receiving groove 1151 and the second receiving groove 2251 becoming too large in order to avoid the first branch 213 and the second branch 215. That is, it helps to avoid R1 and R2 becoming too large, thereby reducing the space occupied by the first receiving section 115 and the second receiving section 225 in the receiving groove 41.

[0057] Furthermore, such as Figure 11As shown, during the process of the movable part 40 flipping from the open position to the folded position, the first connecting rod 11 rotates clockwise around the center of the virtual circle O4, that is, the first connecting rod 11 rotates outward from the receiving groove 41, while the second blocking member 22 rotates counterclockwise around the center of the virtual circle O5, that is, the second blocking member 22 rotates inward from the receiving groove 41. Therefore, the main factor affecting the depth of the receiving groove 41 is the size of the second blocking member 22. Specifically, as... Figure 11 As shown, the farthest distance from the rotation axis of the second blocking member 22 relative to the movable member 40 to the second blocking member 22 is denoted as R3. That is, the second blocking member 22 moves within a virtual circle O3 with a radius of R3. It should be understood that the depth of the receiving groove 41 needs to be greater than R3. However, in this embodiment, the length X3 of the second branch 215 is relatively small, thereby reducing R3 and further reducing the depth of the receiving groove 41.

[0058] In other embodiments, such as Figure 3 As shown, the blocking assembly 20 is implemented as a single unit, with one end hinged to the first connecting rod 11 and the other end adapted to move along a groove on the movable member 40. In other words, the movement trajectory of the blocking assembly 20 is restricted through the cooperation of the first connecting rod 11 and the groove. It should be understood that by implementing the blocking assembly 20 as a single unit, the number of parts in the flipping mechanism 1 is reduced, thereby lowering the production cost and assembly difficulty of the flipping mechanism 1.

[0059] It is worth mentioning that, such as Figure 6 As shown, the blocking assembly 20 is implemented as a first blocking member 21 and a second blocking member 22. The second blocking member 22 not only cooperates with the first connecting rod 11 to limit the movement trajectory of the first blocking member 21, but also the covering section 223 of the second blocking member 22 can cover the receiving groove 41. In addition, when the movable member 40 is in the folded position, the first connecting rod 11 and the second blocking member 22 fold and approach each other on the same side of the first blocking member 21, making the structure of the flipping mechanism 1 more compact, thereby reducing the depth and length of the receiving groove 41.

[0060] In some embodiments, such as Figure 4 and Figure 8 As shown, the linkage assembly 10 also includes a second linkage 12. The second linkage 12 includes a second fixed end 121 and a second movable end 122 disposed opposite to each other. The second fixed end 121 is hinged to the fixing member 30 and spaced apart from the first fixed end 111 of the first linkage 11. The second movable end 122 is hinged to the movable member 40 and spaced apart from the first movable end 112 of the first linkage 11. Figure 4 and Figure 5 As shown, when the movable part 40 is in the folded position, the first link 11 and the second link 12 can be brought side by side so that the movable part 40 is close to the fixed part 30; as Figure 8 and Figure 9 As shown, when the movable part 40 is in the open position, the second movable end 122 of the second link 12 abuts against the lower part of the blocking section 114 of the first link 11, thereby supporting and positioning the movable part 40 through the cooperation of the first link 11 and the second link 12.

[0061] A tabletop device 2, such as Figure 1 and Figure 2 As shown, the device includes a tabletop 50 and at least two of the aforementioned flipping mechanisms 1. Specifically, the tabletop 50 has opposing first side portions 51 and second side portions 52, wherein a movable member 40 of one flipping mechanism 1 is fixed to the first side portion 51 of the tabletop 50, and a movable member 40 of the other flipping mechanism 1 is fixed to the second side portion 52 of the tabletop 50. Further, the fixing member 30 of the flipping mechanism 1 is adapted to be fixed at the installation location so that the tabletop 50 is folded or opened relative to the installation location. It should be understood that the upper surface of the movable member 40 is flush with or nearly flush with the upper surface of the tabletop 50. When the tabletop 50 is opened relative to the installation location, at least a portion of the linkage assembly 10 of the flipping mechanism 1 and the blocking assembly 20 can cover the receiving groove 41 of the movable member 40, making the usable surface of the tabletop device 2 flatter and more aesthetically pleasing, and helping to prevent foreign objects from falling into the receiving groove 41, reducing the risk of the tabletop device 2 becoming stuck or even unable to function properly due to foreign objects falling in.

[0062] In at least one embodiment, such as Figure 2 As shown, the tabletop 50 includes a housing 53 and a mounting bracket 54 housed within the housing 53. The movable part 40 of the flipping mechanism 1 is fixed to the mounting bracket 54, which helps to improve the reliability of the connection between the flipping mechanism 1 and the tabletop 50.

[0063] It is worth mentioning that the installation location includes, but is not limited to, the back of a car seat; this application does not impose specific restrictions on this.

[0064] The basic principles, main features, and advantages of this utility model have been described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A turnover mechanism, characterized in that The utility model relates to a folding screen, comprising: a linkage assembly connecting a movable part and a fixed part to enable the movable part to flip between a folded position and an unfolded position relative to the fixed part, the movable part being provided with a receiving slot; a shielding assembly movably connected to the linkage assembly at one end and movably connected to the movable part at the other end, the linkage assembly being configured to drive the shielding assembly to move relative to the movable part; when the movable part is in the folded position, the linkage assembly and the shielding assembly are folded together, and the shielding assembly is accommodated in the receiving slot of the movable part; when the movable part is in the unfolded position, the linkage assembly and the shielding assembly are unfolded, and at least part of the linkage assembly and the shielding assembly shield the receiving slot.

2. The turnover mechanism according to claim 1, characterized in that The linkage assembly comprises a first linkage, one end of the first linkage being hingedly connected to the fixed part and the other end being hingedly connected to the movable part; the shielding assembly comprises a first shielding part and a second shielding part, the first shielding part being provided with oppositely arranged first and second ends, and the second shielding part being provided with oppositely arranged third and fourth ends, wherein the first end is hingedly connected to the first linkage, the second end is hingedly connected to the third end, and the fourth end is hingedly connected to the movable part; when the movable part is in the folded position, the first linkage and the second shielding part are folded together on the same side of the first shielding part, and when the movable part is in the unfolded position, the first linkage, the first shielding part and the second shielding part are unfolded to shield the receiving slot.

3. The turnover mechanism according to claim 2, wherein The first linkage comprises a connecting section, a shielding section and a first receiving section arranged in sequence, the connecting section and the first receiving section extending to opposite sides of the shielding section respectively, the connecting section being hingedly connected to the fixed part, the first receiving section being hingedly connected to the movable part, the first end of the first shielding part being hingedly connected to the first receiving section, the first linkage being configured to drive the first shielding part to move relative to the movable part, and the first receiving section being provided with a first receiving slot having an opening facing the first shielding part; when the movable part is in the unfolded position, the shielding section shields the receiving slot, the first receiving section is accommodated in the receiving slot, and part of the first shielding part is positioned above the first receiving section to shield the first receiving section; when the movable part is in the folded position, the first linkage and the first shielding part are folded together, and part of the first shielding part is accommodated in the first receiving slot.

4. The turnover mechanism according to claim 3, wherein The first accommodating section comprises a main body part and a connecting part, the main body part is bently extended from the shielding section to form the first accommodating groove, the main body part has a first hinging structure at an end away from the shielding section to be hinged with the movable part, the connecting part is connected to the end of the main body part away from the shielding section and extended towards the shielding section, the connecting part has a second hinging structure at an end away from the main body part to be hinged with the first shielding part, when the movable part is in the folding position, part of the first shielding part is accommodated in the first accommodating groove to be close to the connecting part.

5. The turnover mechanism according to claim 4, wherein The first shielding part comprises a first branch section and a main trunk section connected in sequence, the first branch section and the main trunk section are provided with a fifth hinging structure to be hinged with the second hinging structure of the first connecting rod, a first rotation axis is defined between the fifth hinging structure and the second hinging structure, the distance from the end of the first branch section away from the main trunk section to the first rotation axis is L1, at least part of the groove wall of the first accommodating groove is in the form of a circular arc, and the center of a first virtual circle is located at the first rotation axis, the radius of the first virtual circle is R1, wherein R1>L1.

6. The turnover mechanism of claim 2, wherein The second shielding part comprises a shielding section and a second accommodating section connected in sequence, the shielding section has a third hinging structure at an end away from the second accommodating section to be hinged with the movable part, the second accommodating section is hinged to the second end of the first shielding part, the first shielding part drives the second shielding part to move relative to the movable part, the second accommodating section has a second accommodating groove with an opening facing the first shielding part; When the movable part is in the opening position, the shielding section shields the accommodating groove, part of the first shielding part is located above the second accommodating section to shield the second accommodating section, when the movable part is in the folding position, the first shielding part and the second shielding part are folded close to each other, part of the first shielding part is accommodated in the second accommodating groove, and the second shielding part is accommodated in the accommodating groove.

7. The turnover mechanism according to claim 6, wherein The second accommodating section comprises a main body part and an extension part, the main body part is bently extended from the shielding section to form the second accommodating groove, the extension part is connected to an end of the main body part away from the shielding section and extended towards the shielding section, the extension part has a fourth hinging structure at an end away from the main body part to be hinged with the first shielding part, when the movable part is in the folding position, part of the first shielding part is accommodated in the second accommodating groove to be close to the extension part.

8. The turnover mechanism according to claim 7, wherein The first shielding piece comprises a trunk section and a second branch section connected in sequence, a sixth hinging structure is arranged between the trunk section and the second branch section, the sixth hinging structure is hinged with a fourth hinging structure of the second shielding piece, a second rotating shaft is defined between the sixth hinging structure and the fourth hinging structure, and a distance from an end of the second branch section away from the trunk section to the first rotating shaft is L2; at least a part of a slot wall of the second receiving slot is in an arc shape, a center of a second virtual circle is located at the second rotating shaft, and a radius of the second virtual circle is R2, wherein R2>L2.

9. Turnover mechanism according to any of claims 2-8, characterized in that The first shielding piece comprises a first branch section, a trunk section and a second branch section arranged in sequence, a length of the first branch section is X1, a length of the trunk section is X2, and a length of the second branch section is X3, wherein X2>X1>X3.

10. A table board apparatus, characterized by comprising: The table comprises: a table board having opposite first and second side portions; at least two flip mechanisms as claimed in any one of claims 1-9, wherein the movable part of one of the flip mechanisms is fixed to the first side portion of the table board and the movable part of the other flip mechanism is fixed to the second side portion of the table board; and the fixed parts of the flip mechanisms are adapted to be fixed at a location to be installed so as to fold or unfold the table board relative to the location to be installed.

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