Vehicle-mounted movable table board ratchet wheel adjusting mechanism
The ratchet adjustment mechanism for the vehicle-mounted mobile table solves the problem of the inability to adjust the table longitudinally, achieving reliable locking and stability of the table's front and rear positions, adapting to the position requirements of different carriages, and improving the flexibility and safety of the vehicle-mounted table.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YUQIU MOLD PLASTICS CO LTD OF KUNSHAN
- Filing Date
- 2025-12-23
- Publication Date
- 2026-05-12
AI Technical Summary
Existing vehicle-mounted tables cannot be adjusted longitudinally according to the user's position in the front or back of the vehicle, and require independent pillars and guide rails when moving, resulting in instability during vehicle movement.
The vehicle-mounted mobile table adopts a ratchet adjustment mechanism. Through the cooperation of the ratchet locking mechanism and the linear rack, the front and rear positions of the table can be adjusted, and it can be reliably locked after adjustment to ensure the stability of the table during vehicle operation.
It enables reliable adjustment and stable locking of the table's front and rear positions, adapting to the positioning needs of different carriages and improving the flexibility and safety of the onboard table.
Smart Images
Figure CN122008993A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of vehicle-mounted tables, specifically to a ratchet adjustment mechanism for a vehicle-mounted mobile table. Background Technology
[0002] To address urgent work or entertainment needs while driving, in-car tables have emerged, instantly transforming the vehicle's interior into an efficient workspace or relaxation area. During long drives, rear passengers can easily place laptops for video conferencing or document editing; or, during breaks, they can place electronic devices on the table for entertainment.
[0003] However, existing vehicle-mounted tables are generally fixed in position, adjustable only in terms of tilt or rotation angle. They cannot be adjusted longitudinally to fit the user's position within the vehicle. This is because the interior space of a vehicle is relatively small, and moving the table requires a separate support column with a guide rail at its base. Furthermore, to handle sudden braking or other emergencies while the vehicle is moving, the table needs to be reliably locked to the guide rail when not in use. Therefore, existing forward / backward adjustment mechanisms are not suitable for vehicle-mounted tables. Consequently, there is an urgent need to develop an adjustment mechanism suitable for moving vehicle-mounted tables, allowing for forward / backward adjustment as needed. Summary of the Invention
[0004] To address the aforementioned issues, this invention provides a ratchet adjustment mechanism for a vehicle-mounted mobile table. This mechanism allows the operator to adjust the front and rear positions of the table according to usage requirements, and ensures that the entire table is reliably locked in place after adjustment, thus ensuring the table's position remains stable and reliable during vehicle operation.
[0005] A ratchet adjustment mechanism for a vehicle-mounted mobile table, characterized in that it comprises: Two guide rails, each guide rail including a guide cavity in the middle of the width direction and downward sheet metal pressure strips on both sides of the width direction, with a locking gap between the downward sheet metal pressure strips on the outer side and the bottom of the guide rail; Table rails; Tabletop; A horizontal connecting seat includes a base plate and a cover, wherein the cover is fitted onto the base plate to form a cavity area; One ratchet; Ratchet locking mechanism; And two sets of linear racks, each set of linear racks is provided with a locking block at the outer end, and the lower part of the locking block protrudes downward and is provided with a side-protruding locking pressure tooth; The bottom of the base plate has locking block guide grooves at both ends along its length. The bottom of the table rod has a lower protrusion. The cover has a through positioning hole in the middle along its length. The ratchet is located in the cavity area. The bottom of the table rod passes through the positioning hole and is fixed to the ratchet. The table rod rotates to drive the ratchet to rotate. The ratchet locking mechanism is located on the side of the ratchet and is located in the cavity area. Two sets of linear racks are arranged at the front and rear positions of the cavity area, and the racks of each set of linear racks are engaged with the ratchet. The locking blocks of each set of linear racks pass through the locking block guide grooves, and the locking pressure teeth on the corresponding side are set towards the guide gap of the guide rail on the corresponding side. When the ratchet locking mechanism locks the ratchet, the locking teeth are fixed in position relative to the guide gap. When the ratchet locking mechanism does not lock the ratchet, the table rod rotates to drive the ratchet to rotate, completing the action of inserting the locking teeth into or away from the guide gap.
[0006] Its further features are: The ratchet locking mechanism is used to perform three locking modes on the ratchet: single right-hand rotation, single left-hand rotation, and bidirectional locking. In the single right-hand rotation state, the table arm can only rotate to the right, thereby driving the ratchet to rotate to the right; in the single left-hand rotation state, the table arm can only rotate to the left, thereby driving the ratchet to rotate to the left; in the bidirectional locking state, the table arm cannot rotate, thereby completely locking the ratchet. The ratchet locking mechanism includes a locking seat, two sets of locking foot mechanisms, and a locking foot drive switching mechanism. Each set of locking foot mechanisms includes a locking foot and a spring. The spring locking seat is a U-shaped block. The spring locking seat is arranged in the cavity area, and the U-shaped notch faces the ratchet. The two sides of the U-shaped block of the spring locking seat and the front and rear end walls of the cavity area form a guide groove for guiding the linear rack, thereby ensuring the linear movement of the linear rack and reliable engagement with the ratchet. Each set of latches includes a mounting end and a latch end. The latch ends of the two sets of latches face different directions. The latch ends of each set of latches are latched behind the ratchet teeth, allowing the ratchet to rotate in only one direction. This enables the entire mechanism to perform three control operations: single left turn, single right turn, and two-way locking. The locking foot drive switching mechanism includes an adapter block, a drive knob, and two limit spring mechanisms. The top of the cover is provided with a rotating shaft clearance hole and two spring clearance holes. The rotating shaft end of the drive knob passes through the rotating shaft clearance hole and is fixed to the adapter block. Corresponding locking feet are installed on both sides of the adapter block. The outer ends of the two sets of locking feet are pressed tightly against the corresponding outer periphery of the adapter block by springs. The telescopic columns of the two sets of limit spring mechanisms protrude outward from the spring clearance holes, and in the bidirectional locking state, the drive end of the drive knob is located in the area between the two sets of telescopic columns. The adapter block is specifically a cam block structure. After the protruding part of the adapter block is pressed onto the locking foot on one side, the locking foot end of the corresponding side lock foot disengages from the ratchet and forms a single left-hand or single right-hand rotation state. When the protruding part of the adapter block is not pressed onto the locking feet on both sides, the locking foot ends of the locking feet on both sides are engaged with the teeth of the ratchet, completing the bidirectional locking. The base plate has a protruding table corner on each side along its length. The protruding table corner is used to support the entire table rod and table board, ensuring that the table board is stable and reliable. The top of the table rod is provided with a rotating support frame, the lower protruding rod of the rotating support frame is inserted into the inner cavity of the table rod, and the rotating output end of the rotating support foot is fixedly mounted with the table board, which allows the table board to rotate at an angle and change position according to actual needs, and makes the support of the table board stable and reliable. The rotating support frame is equipped with locking mechanisms for the rotating parts of the table arm and tabletop, respectively. The locking mechanisms are used to ensure that the tabletop is in a stable and reliable position during use.
[0007] After adopting the above technical solution, guide blocks are fixed at both ends of the base plate in the length direction where they do not conflict with the locking teeth. The guide blocks are embedded in the central guide cavity. When the locking teeth on both sides move away from the guide gap, external force drives the integrated mechanism formed by the table, table rod, and horizontal connecting seat to move along the two guide rails. When the table moves to the appropriate front-back position, the ratchet locking mechanism does not lock the ratchet, and the table rod rotates, driving the ratchet to rotate, completing the action of inserting the locking teeth into the guide gap, thereby completing the locking in the height direction and the front-back position, and the ratchet locking mechanism locks the ratchet, ensuring the front of the table... The rearward position is stable and reliable. When the table needs to be moved back and forth, the ratchet locking mechanism does not lock the ratchet. The table rod rotates, causing the ratchet to rotate, completing the action of locking the pressure tooth away from the guide gap. Then, the table is moved to the appropriate back and forth position again, and the ratchet locking mechanism is used again to lock the ratchet. This allows the operator to adjust the back and forth position of the table according to the usage requirements, and ensures that the entire table is reliably locked after the table is adjusted to the correct position, ensuring that the table position is stable and reliable during operation. Moreover, the entire mechanism can be reasonably assembled according to the position requirements inside the carriage, and has good versatility. Attached Figure Description
[0008] Figure 1 This is a perspective view of a specific embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the AA cross-section structure; Figure 3 for Figure 1 Schematic diagram of the BB cross-section; Figure 4 This is a schematic diagram of the ratchet locking mechanism and ratchet assembly in the single left-hand rotation state of the present invention (with the cover removed). Figure 5 This is a schematic diagram of the ratchet locking mechanism and ratchet assembly in the single right-hand rotation state of the present invention (with the cover removed). Figure 6 This is a schematic diagram of the assembly of the ratchet locking mechanism and the ratchet in the bidirectional locking state of the present invention (with the cover removed). Figure 7 for Figure 2 A magnified schematic diagram of the structure at point C; Figure 8 for Figure 6 A magnified schematic diagram of the structure at point D; The names corresponding to the serial numbers in the diagram are as follows: 10. Guide rail 11. Mid-width guide cavity 12. Downward sheet metal pressure strip 13. Locking gap 14. Table rod 20. Lower protrusion 21. Tabletop 30. Horizontal connecting seat 40. Base plate 41. Locking block guide groove 411. Cover 42. Positioning hole 421. Rotation shaft clearance hole 422. Spring clearance hole 423. Cavity area 43. Lower protruding table corner 44. Ratchet 50. Ratchet locking mechanism 60. Linear rack 70. 71. Locking block, 72. Locking pressure tooth, 80. Locking seat, 90. Clamping foot mechanism, 91. Mounting end, 912. Clamping foot end, 92. Spring, 100. Clamping foot drive switching mechanism, 101. Adapter block, 102. Drive knob, 1021. Rotating shaft end, 1022. Drive end, 103. Limiting spring mechanism, 1031. Telescopic column, 110. Rotating support frame, 111. Lower protruding rod, 112. Rotating output end. Locking mechanism 1. Detailed Implementation
[0009] See the ratchet adjustment mechanism for the vehicle-mounted mobile table. Figures 1-8 It includes two guide rails 10, table rods 20, tabletop 30, horizontal connecting seat 40, a ratchet 50, a ratchet locking mechanism 60, and two sets of linear racks 70; Each guide rail 10 includes a central guide cavity 11 in the width direction and downward sheet metal pressure strips 12 on both sides in the width direction. The downward sheet metal pressure strips 12 on the outer side and the bottom of the guide rail 10 are provided with a locking gap 13. The horizontal connecting seat 40 includes a base plate 41 and a cover 42. After the cover 42 is installed on the base plate 41, it forms a cavity area 43. Each set of linear racks 70 has a locking block 71 at its outer end, and the lower part of the locking block 71 protrudes downward and is provided with a side-protruding locking pressure tooth 72. The bottom of the base plate 41 has locking block guide grooves 411 at both ends along its length. The bottom of the table rod 20 has a lower protrusion 21. The cover 42 has a through positioning hole 421 in the middle along its length. The ratchet 50 is located in the cavity area 43. The bottom of the table rod 20 passes through the positioning hole 421 and is fixed to the ratchet 50. The table rod 20 rotates and drives the ratchet 50 to rotate. A ratchet locking mechanism 60 is provided on the side of the ratchet 50. The ratchet locking mechanism 60 is located in the cavity area 43. Two sets of linear racks 70 are arranged in front and behind the cavity area 43, and are arranged laterally. The racks of each set of linear racks 70 are meshed with the ratchet 50. The locking block 71 of each set of linear racks 70 passes through the locking block guide groove 411, and the locking pressure teeth 72 on the corresponding side are set towards the guide gap 13 of the guide rail 10 on the corresponding side. When the ratchet locking mechanism 60 locks the ratchet 50, the locking tooth 72 is fixed relative to the guide gap 13. When the ratchet locking mechanism 60 does not lock the ratchet 50, the table arm 20 rotates, driving the ratchet 50 to rotate, completing the action of inserting the locking tooth 72 into the guide gap 13 or away from the guide gap 13.
[0010] In practice, the ratchet locking mechanism 60 is used to perform three locking modes on the ratchet 50: single right-hand rotation, single left-hand rotation, and bidirectional locking. In the single right-hand rotation state, the table arm 20 can only rotate to the right, thereby driving the ratchet 50 to rotate to the right; in the single left-hand rotation state, the table arm 20 can only rotate to the left, thereby driving the ratchet 50 to rotate to the left; in the two-way locking state, the table arm 20 cannot rotate, thereby making the ratchet 20 completely locked. The ratchet locking mechanism 60 includes a locking seat 80, two sets of locking foot mechanisms 90, and a locking foot drive switching mechanism 100. Each set of locking foot mechanisms 90 includes a locking foot 91 and a spring 92. The spring locking seat 80 is a U-shaped block. The spring locking seat 80 is arranged in the cavity area 43, and the U-shaped notch 81 is set towards the ratchet 50. The two sides of the U-shaped block of the spring locking seat 80 and the front and rear end walls of the cavity area 43 form a guide groove for guiding the linear rack 70, thereby ensuring the linear movement of the linear rack 70 and reliable engagement with the ratchet 50.
[0011] In a specific embodiment, each set of latches 91 includes a mounting end 911 and a latch end 912. The latch ends 912 of the two sets of latches 91 face different directions. The latch ends 912 of each set of latches 91 are latched behind the teeth of the ratchet 50, which can only make the ratchet 50 rotate in one direction, thereby enabling the entire mechanism to perform three control operations: single left rotation, single right rotation, and bidirectional locking. The locking foot drive switching mechanism 100 includes an adapter block 101, a drive knob 102, and two limit spring mechanisms 103. The top of the cover 42 is provided with a rotating shaft clearance hole 422 and two spring clearance holes 423. The rotating shaft end 1021 of the drive knob 102 passes through the rotating shaft clearance hole 422 and is fixed to the adapter block 101. Corresponding locking feet 91 are installed on both sides of the adapter block 101. The outer ends of the two sets of locking feet 91 are pressed against the corresponding outer periphery of the adapter block 101 by springs 92. The telescopic columns 1031 of the two sets of limit spring mechanisms 103 protrude out of the spring clearance holes 423, and the drive end 1022 of the drive knob 102 is located in the area between the two sets of telescopic columns 1031 in the bidirectional locking state. The adapter block 101 is specifically a cam block structure. After the protruding part of the adapter block 101 is pressed onto the latch 91 on one side, the latch end 912 of the corresponding latch 91 disengages from the ratchet 50 and forms a single left-hand or single right-hand rotation state. When the protruding part of the adapter block 101 is not pressed onto the latches 91 on both sides, the latch ends 912 of the latches 91 on both sides are embedded in the gear teeth of the ratchet 50, completing the bidirectional locking.
[0012] In a specific embodiment, a protruding table corner 44 is provided on both sides of the base plate 42 along its length. The protruding table corner 44 is used to support the entire table rod 20 and table board 30, ensuring that the table board 30 is stable and reliable.
[0013] In a specific embodiment, a rotating support frame 110 is provided at the top of the table rod 20. The lower protruding rod 111 of the rotating support frame 110 is inserted into the inner cavity of the table rod 20. The rotating output end 112 of the rotating support foot 110 is fixedly mounted with a table board 30, which allows the table board 30 to rotate at an angle and change position according to actual needs, and makes the support of the table board 30 stable and reliable. The rotating support frame 110 is equipped with locking mechanisms 1 for the rotating parts of the table rod 20 and the table board 30, respectively. The locking mechanisms 1 are used to ensure that the table board 30 is in a stable and reliable position during use.
[0014] In a specific embodiment, the lateral length of the linear rack 70 is less than the lateral length of the spatial region 43. The inner ends of the two sets of linear racks 70 move towards each other horizontally in sync, thereby enabling the locking teeth 72 and the guide gap 13 on both sides to lock or move away synchronously.
[0015] In practice, the table arm 20 and the table board 30 can rotate synchronously or asynchronously according to the user's needs. When they rotate asynchronously, the table arm 20 can include internal and external structures or separate upper and lower structures, depending on the actual situation of the vehicle.
[0016] In practice, the locking pin 91 at the front end is used for left-hand locking, and the locking pin 91 at the rear end is used for right-hand locking.
[0017] In a specific embodiment, the locking seat 80 and the base plate 41 are integrally formed, which results in high dimensional accuracy and reduces assembly errors.
[0018] Its working principle is as follows: Guide blocks are fixed at both ends of the base plate at positions that do not conflict with the locking teeth. The guide blocks are embedded in the central guide cavity. When the locking teeth on both sides move away from the guide gap, external force drives the integrated mechanism formed by the table, table rod, and horizontal connecting seat to move along the two guide rails. When the table moves to the appropriate front-back position, the ratchet locking mechanism does not lock the ratchet. The table rod rotates, driving the ratchet to rotate, completing the action of inserting the locking teeth into the guide gap. This completes the locking in the height and front-back directions, and the ratchet locking mechanism locks the ratchet, ensuring the front-back position of the table. The mechanism ensures stable and reliable positioning. When the table needs to be moved again, the ratchet locking mechanism does not lock the ratchet. The table lever rotates, causing the ratchet to rotate and completing the locking action of moving the locking teeth away from the guide gap. Afterward, the table is moved to the appropriate position, and the ratchet locking mechanism is used again to lock the ratchet. This allows the operator to adjust the table's position according to usage needs, and ensures that the table is reliably locked after adjustment, ensuring stable and reliable positioning of the table during operation. The entire mechanism can be reasonably assembled according to the position requirements inside the carriage, making it highly versatile.
[0019] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0020] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A ratchet adjustment mechanism for a vehicle-mounted mobile table, characterized in that, It includes: Two guide rails, each guide rail including a guide cavity in the middle of the width direction and downward sheet metal pressure strips on both sides of the width direction, with a locking gap between the downward sheet metal pressure strips on the outer side and the bottom of the guide rail; Table rails; Tabletop; A horizontal connecting seat includes a base plate and a cover, wherein the cover is fitted onto the base plate to form a cavity area. One ratchet; Ratchet locking mechanism; And two sets of linear racks, each set of linear racks is provided with a locking block at the outer end, and the lower part of the locking block protrudes downward and is provided with a side-protruding locking pressure tooth; The bottom of the base plate has locking block guide grooves at both ends along its length. The bottom of the table rod has a lower protrusion. The cover has a through positioning hole in the middle along its length. The ratchet is located in the cavity area. The bottom of the table rod passes through the positioning hole and is fixed to the ratchet. The table rod rotates to drive the ratchet to rotate. The ratchet locking mechanism is located on the side of the ratchet and is located in the cavity area. Two sets of linear racks are arranged at the front and rear positions of the cavity area, and the racks of each set of linear racks are engaged with the ratchet. The locking blocks of each set of linear racks pass through the locking block guide grooves, and the locking pressure teeth on the corresponding side are set towards the guide gap of the guide rail on the corresponding side. When the ratchet locking mechanism locks the ratchet, the locking teeth are fixed in position relative to the guide gap. When the ratchet locking mechanism does not lock the ratchet, the table rod rotates, causing the ratchet to rotate, thus completing the action of inserting the locking teeth into or away from the guide gap.
2. The ratchet adjustment mechanism for the vehicle-mounted mobile table according to claim 1, characterized in that: The ratchet locking mechanism is used to perform three locking modes on the ratchet: single right-hand rotation, single left-hand rotation, and bidirectional locking.
3. The ratchet adjustment mechanism for the vehicle-mounted mobile table according to claim 2, characterized in that: In the single right-hand rotation state, the table arm can only rotate to the right, thereby driving the ratchet to rotate to the right; In the single left-hand rotation state, the table arm can only rotate to the left, thereby driving the ratchet to rotate to the left; in the two-way locking state, the table arm cannot rotate, thereby making the ratchet completely locked.
4. The ratchet adjustment mechanism for the vehicle-mounted mobile table according to claim 3, characterized in that: The ratchet locking mechanism includes a locking seat, two sets of locking foot mechanisms, and a locking foot drive switching mechanism. Each set of locking foot mechanisms includes a locking foot and a spring. The spring locking seat is a U-shaped block. The spring locking seat is arranged in the cavity area, and the U-shaped notch faces the ratchet. Guide grooves for linear rack guidance are formed between the two sides of the U-shaped block of the spring locking seat and the front and rear end walls of the cavity area.
5. The ratchet adjustment mechanism for the vehicle-mounted mobile table according to claim 4, characterized in that: Each set of latches includes a mounting end and a latching end. The latching ends of the two sets of latches face different directions. The latching ends of each set of latches are engaged with the teeth of the ratchet, allowing the ratchet to rotate in only one direction.
6. The ratchet adjustment mechanism for the vehicle-mounted mobile table according to claim 4, characterized in that: The locking foot drive switching mechanism includes an adapter block, a drive knob, and two limit spring mechanisms. The top of the cover is provided with a rotating shaft clearance hole and two spring clearance holes. The rotating shaft end of the drive knob passes through the rotating shaft clearance hole and is fixed to the adapter block. Corresponding locking feet are installed on both sides of the adapter block. The outer ends of the two sets of locking feet are pressed tightly against the corresponding outer periphery of the adapter block by springs. The telescopic columns of the two sets of limit spring mechanisms protrude outward from the spring clearance holes, and in the bidirectional locking state, the drive end of the drive knob is located in the area between the two sets of telescopic columns.
7. The ratchet adjustment mechanism for the vehicle-mounted mobile table according to claim 6, characterized in that: The adapter block is specifically a cam block structure.
8. The ratchet adjustment mechanism for the vehicle-mounted mobile table according to claim 1, characterized in that: The base plate has protruding table corners on both sides along its length.
9. The ratchet adjustment mechanism for the vehicle-mounted mobile table according to claim 1, characterized in that: The top of the table rod is provided with a rotating support frame, the lower protrusion of the rotating support frame is inserted into the inner cavity of the table rod, and the rotating output end of the rotating support foot is fixedly mounted with the table board.
10. The ratchet adjustment mechanism for the vehicle-mounted mobile table according to claim 9, characterized in that: The rotating support frame is equipped with locking mechanisms for the rotating parts of the table arm and table board, respectively.