Unlocking mechanism for truck seat

Abstract

The present invention relates to an unlocking mechanism of a truck seat in the technical field of automobile seats, comprising a seat base, a seat frame and a seat body, wherein the seat base is provided with a guide rail, the seat frame is provided with a slide rail, the slide rail is provided with a rack, the guide rail is provided with a limit block, the limit block is rotatably connected with the guide rail through a rotating shaft, the rotating shaft is provided with a first limit tooth plate, the limit block is provided with a pull rod, the pull rod is provided with a first drive assembly, a turntable is provided on the seat body, a toothed disc is provided on the turntable, an embedded hole is provided on the seat frame, a second limit tooth plate is provided in the embedded hole, a second drive assembly is also provided in the embedded hole, a controller is provided on the seat base, a control switch is provided on the seat body, and the control switch, the controller, the first drive assembly and the second drive assembly are connected through a line. The designed unlocking mechanism of the truck seat has the function of realizing simultaneous unlocking of the seat body while rotating and sliding, improving the convenience and practicality of adjusting the seat body, and is simple to operate.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, in particular to an unlocking mechanism for a truck seat. Background Art

[0002] At present, users have higher and higher requirements for car performance and car comfort. Car seats, as the most intuitive embodiment of car comfort, have higher and higher performance requirements. A good seat can not only improve the user's comfort, but also greatly improve the driver's flexibility to a certain extent. However, during driving, the driver needs to adjust the seat according to personal requirements and habits to improve comfort.

[0003] A Chinese patent with authorization announcement number CN107361732B discloses a car seat unlocking mechanism, including a handle shell, the handle shell is hollow inside and has a locking side and an unlocking side arranged oppositely, and the upper part of the side wall of the handle shell between the locking side and the unlocking side is provided with a curved groove bending downward from the locking side to the unlocking side; the unlocking handle is placed inside the handle shell, and the upper part of the unlocking handle is provided with a sliding member, which is slidably arranged in the curved groove and moves along the curved groove with the unlocking handle; the wiring harness head of the unlocking harness is connected to the unlocking handle and triggers the unlocking device as the unlocking handle moves toward the unlocking side; the handle shell is provided with a through hole for the unlocking harness to pass through; the first end of the crank is hinged to the unlocking side of the handle shell, and the second end of the crank is pivotally connected to the lower pivot of the unlocking handle; the reset element is arranged between the crank and the unlocking handle and applies a reset force to separate the crank and the unlocking handle away from each other when the crank and the unlocking handle rotate towards each other and approach each other.

[0004] When the car seat unlocking mechanism is working, the unlocking handle is pushed and the sliding part moves downward along the curved groove. During the sliding process of the sliding part, the unlocking handle will exert a downward force on the crank, and the crank will rotate downward along the pin shaft around the handle housing. At this time, the angle between the lower part of the unlocking handle and the second end of the crank will gradually decrease, that is, the crank and the unlocking handle will move closer to each other. At this time, the reset element is squeezed by the crank and the unlocking handle, and the unlocking harness is stretched outward during the movement of the unlocking handle. When the sliding part moves to the leftmost end of the curved groove, that is, the fully unlocked position, the unlocking harness is in a fully stretched state, and the car seat is in a fully unlocked state.

[0005] When the above technical solution is in operation, the car seat is only provided with a sliding adjustment in the horizontal direction, and only the sliding adjustment is unlocked, so the practicality is low. Summary of the invention

[0006] The purpose of the present invention is to provide an unlocking mechanism for a truck seat, which can realize simultaneous unlocking of a seat body while rotating and sliding, thereby improving the convenience and practicality of adjusting the seat body and being simple to operate.

[0007] The above object of the present invention is achieved through the following technical solutions:

[0008] A truck seat unlocking mechanism comprises a seat base, a seat frame plate located above the seat base and a seat body located on the seat frame plate, guide rails located on the seat base and along the length direction of the seat base are arranged near both sides of the seat base, slide rails that can slide along the guide rails are arranged on the seat frame plate, racks are arranged on the sides of the two slide rails close to each other, the racks are arranged along the length direction of the slide rails, limiting blocks are arranged on the two guide rails, the limiting blocks are rotatably connected to the guide rails through a rotating shaft, a first limiting tooth plate that can mesh with the rack is arranged at one end of the rotating shaft away from the limiting block, and the two limiting blocks A pull rod is arranged between the seats, and a first driving component for driving the pull rod to rotate is arranged on the pull rod, a turntable is arranged under the seat body, a gear plate is arranged on the turntable on the side away from the seat body, the gear plate and the turntable are arranged concentrically, an embedding hole for the turntable to be engaged is opened on the seat frame plate, a second limiting gear plate that can mesh with the gear plate is arranged in the embedding hole, and a second driving component for driving the second limiting gear plate to rotate is also arranged in the embedding hole, a controller is arranged on the seat base, and a control switch is arranged on the seat body, and the control switch, the controller, the first driving component and the second driving component are connected through lines.

[0009] By implementing the above technical scheme, when unlocking the truck seat, the control switch is adjusted, and the control switch transmits the signal to the controller through the line. The controller sends a signal to the first drive component and the second drive component. The first drive component works, the first drive component pushes the pull rod to rotate, the pull rod drives the limit block to rotate, the limit block drives the rotating shaft to rotate, the rotating shaft drives the second limit tooth plate to rotate, so that the second limit tooth plate is separated from the rack, and the sliding unlocking of the truck seat is realized. When the second drive component works, the second drive component drives the second limit tooth plate to rotate, so that the second limit tooth plate is separated from the gear plate, and the rotation unlocking of the truck seat is realized. The designed unlocking mechanism of the truck seat can realize the simultaneous unlocking of the seat body while rotating and sliding, thereby improving the convenience and practicality of adjusting the seat body, and its operation is simple.

[0010] The present invention is further configured such that the pull rod is U-shaped and comprises a first transverse section, a longitudinal section and a second transverse section which are integrally provided and sequentially connected, and the longitudinal section is connected to the first driving assembly.

[0011] By implementing the above technical solution, the pull rod is arranged in a U-shape, which facilitates the connection between the pull rod, the limit block and the first drive assembly.

[0012] The present invention is further configured such that an open groove is provided on one side of the two limit blocks close to each other, and the first transverse section and the second transverse section are inserted into the open groove.

[0013] By implementing the above technical solution, the limit block with an open design can limit the first transverse section and the second transverse section, thereby realizing synchronous movement of the pull rod and the rack.

[0014] The present invention is further configured such that the first drive component includes a first cylinder or a first drive motor located on the seat frame plate, the cylinder shaft of the first cylinder and the drive shaft of the first drive motor are both arranged perpendicular to the bottom wall of the seat frame plate along the axial direction, the cylinder shaft of the first cylinder and the drive shaft of the first drive motor are connected to the middle position of the longitudinal section through a first connecting member, and the first connecting member is rotationally connected to the longitudinal section.

[0015] By implementing the above technical scheme, the first cylinder or the first drive motor is adjusted, the cylinder shaft of the first cylinder or the drive shaft of the first drive motor drives the first connecting member to move, the first connecting member drives the pull rod to move in the vertical direction, and at the same time drives the pull rod to rotate, the pull rod drives the limit block to rotate, the limit block drives the rotating shaft to rotate, and the rotating shaft drives the first limit gear plate to rotate, thereby realizing the sliding unlocking of the truck seat; the designed first drive assembly is convenient for driving the pull rod to rotate, thereby providing driving force for the sliding unlocking of the truck seat.

[0016] The present invention is further configured such that the second drive assembly includes a second cylinder or a second drive motor located on the bottom wall of the embedding hole, the cylinder shaft of the second cylinder and the drive shaft of the second drive motor are both arranged perpendicular to the bottom wall of the seat frame along the axial direction, a support frame is supported in the embedding hole, the second position limiting tooth plate is rotatably connected to the support frame, the second position limiting tooth plate is connected to the cylinder shaft or the second drive point of the second cylinder through a second connecting member at one end away from the rotational connection with the gear plate, and the second connecting member is rotatably connected to the second position limiting tooth plate.

[0017] By implementing the above technical solution, the second cylinder or the second drive motor is driven, the cylinder shaft of the second cylinder or the drive shaft of the second drive motor drives the second connecting member to move, and the second connecting member drives the second limiting gear plate to rotate, so that the meshing part of the second limiting gear plate and the gear plate is separated from the gear plate, thereby realizing the rotational unlocking of the truck seat; the designed second drive assembly is convenient for providing driving force to the second limiting gear plate, so that the second limiting gear plate rotates, thereby realizing the rotational unlocking of the truck seat.

[0018] The present invention is further configured such that a bearing is installed in the embedded hole, an inner ring of the bearing is sleeved on the outer periphery of the turntable and has an interference fit with the turntable, and an outer ring of the bearing has an interference fit with the wall of the embedded hole.

[0019] By implementing the above technical solution, the designed bearing can reduce the friction between the turntable and the wall of the embedded hole, making it easier for the seat body of the truck seat to rotate.

[0020] The present invention is further configured such that a first spring sheet is provided on the first limiting tooth plate to enable the first limiting tooth plate to mesh with the rack, one end of the first spring sheet is connected to the first limiting tooth plate, and the other end is connected to the slide rail.

[0021] By implementing the above technical solution, the designed first spring can apply force to the first limiting tooth plate, so that the first limiting tooth plate is engaged with the rack under normal conditions, thereby achieving sliding locking of the truck seat.

[0022] The present invention is further configured such that a second spring sheet is provided on the second position limiting tooth plate to enable the second position limiting tooth plate to mesh with the toothed disc, one end of the second spring sheet is connected to the second position limiting tooth plate, and the other end is connected to the seat frame plate.

[0023] By implementing the above technical solution, the designed second spring can apply force to the second limiting tooth plate, so that the second limiting tooth plate is engaged with the toothed disc under normal conditions, thereby realizing the rotation locking of the truck seat.

[0024] In summary, the present invention has the following beneficial effects:

[0025] 1. The unlocking mechanism of the truck seat is designed to realize the unlocking of the seat body while rotating and sliding, thereby improving the convenience and practicality of adjusting the seat body, and its operation is simple;

[0026] 2. The unlocking mechanism of the truck seat is designed with a first spring leaf that can apply force to the first limit tooth plate, so that the first limit tooth plate is engaged with the rack under normal conditions, thereby achieving sliding locking of the truck seat; the second spring leaf that is designed can apply force to the second limit tooth plate, so that the second limit tooth plate is engaged with the gear disc under normal conditions, thereby achieving rotational locking of the truck seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0028] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention from another viewing angle.

[0029] Figure 3 yes Figure 2 AA section view.

[0030] Figure 4 yes Figure 3 An enlarged schematic diagram of part B.

[0031] Figure 5 yes Figure 2 CC surface section view.

[0032] Figure 6 yes Figure 5 An enlarged schematic diagram of part D of FIG.

[0033] Figure 7 It is a partial structural schematic diagram of an embodiment of the present invention, and is intended to illustrate the second driving cylinder and the second connecting member in the second driving assembly.

[0034] Figure 8 It is a partial structural schematic diagram of an embodiment of the present invention, and is intended to illustrate the first drive motor and the first connecting member in the first drive assembly.

[0035] Figure numerals: 1, seat base; 11, guide rail; 12, rack; 2, seat frame; 21, slide rail; 22, bearing; 23, embedded hole; 24, toothed disc; 3, seat body; 31, turntable; 4, pull rod; 41, first transverse section; 42, longitudinal section; 43, second transverse section; 5, first drive assembly; 51, first connecting member; 511, first threaded rod; 512, connecting plate; 513, second sliding groove; 52, support plate; 53, first sliding groove; 54, limit Position block; 55, opening slot; 56, first limit tooth plate; 57, first spring; 58, first cylinder; 59, first drive motor; 6, second drive assembly; 61, second connecting member; 611, connecting column; 612, second threaded rod; 62, second limit tooth plate; 63, second sliding slot; 64, second spring; 65, second cylinder; 66, second drive motor; 67, support frame; 68, rotating column; 69, first sliding slot; 7, controller; 71, control switch. DETAILED DESCRIPTION

[0036] The technical solution of the embodiment of the present invention will be described below in conjunction with the accompanying drawings.

[0037] like Figure 1 and Figure 2 As shown, an unlocking mechanism for a truck seat comprises a seat base 1, a seat frame 2 located above the seat base 1, and a seat body 3 located on the seat frame 2. Guide rails 11 located on the seat base 1 and along the length direction of the seat base 1 are installed near both sides of the seat base 1. Slide rails 21 that can slide along the guide rails 11 are installed on the seat frame 2. A rack 12 is fixedly connected to one side of the two slide rails 21 close to each other. The rack 12 is arranged along the length direction of the slide rail 21. Figure 3 and Figure 4, a limit block 54 is installed on the two guide rails 11, and the limit block 54 is rotatably connected to the guide rail 11 through a rotating shaft. A first limit tooth plate 56 that can mesh with the rack 12 is fixedly connected to the end of the rotating shaft away from the limit block 54. A first spring 57 that makes the first limit tooth plate 56 tend to mesh with the rack 12 is installed on the first limit tooth plate 56. One end of the first spring 57 is connected to the first limit tooth plate 56, and the other end is connected to the slide rail 21. A pull rod 4 is arranged between the two limit blocks 54, and a first driving component 5 that drives the pull rod 4 to rotate is arranged on the pull rod 4. See Figure 5 and Figure 6 A turntable 31 is fixedly connected to the bottom of the seat body 3, a toothed disc 24 is fixedly connected to the turntable 31 on the side away from the seat body 3, the toothed disc 24 is concentrically arranged with the turntable 31, an embedding hole 23 for the turntable 31 to be embedded is opened on the side of the seat frame 2 close to the seat body 3, a bearing 22 is installed in the embedding hole 23, the inner ring of the bearing 22 is sleeved on the outer periphery of the turntable 31 and has an interference fit with the turntable 31, the outer ring of the bearing 22 has an interference fit with the hole wall of the embedding hole 23, and a second limiting toothed plate that can mesh with the toothed disc 24 is installed in the embedding hole 23 62, a second driving assembly 6 for driving the second limiting tooth plate 62 to rotate is also installed in the embedding hole 23, and a second spring leaf 64 is connected to the second limiting tooth plate 62 to make the second limiting tooth plate 62 tend to mesh with the toothed disc 24, one end of the second spring leaf 64 is connected to the second limiting tooth plate 62, and the other end is connected to the seat frame plate 2, the seat base 1 is provided with a controller 7, and the seat body 3 is provided with a control switch 71, and the control switch 71, the controller 7, the first driving assembly 5 and the second driving assembly 6 are connected through a line.

[0038] like Figure 3 and Figure 4 As shown, the pull rod 4 is arranged in a U shape, and the pull rod 4 includes a first transverse section 41, a longitudinal section 42 and a second transverse section 43 which are integrally arranged and connected in sequence, the longitudinal section 42 is connected to the first driving component 5, and an opening groove 55 is opened on one side of the two limit blocks 54 close to each other, and the first transverse section 41 and the second transverse section 43 are inserted into the opening groove 55.

[0039] like Figure 6 As shown, the first driving assembly 5 is preferably of two types, one of which is a first cylinder 58 located on the seat frame 2, the cylinder shaft of the first cylinder 58 is arranged along the axial direction perpendicular to the bottom wall of the seat frame 2, the cylinder shaft end of the first cylinder 58 is rotatably connected to the middle position of the longitudinal section 42 through a first connecting member 51, the first connecting member 51 includes a support plate 52, the support plate 52 is provided with a first sliding groove 53 for the longitudinal section 42 to slide, and the first sliding groove 53 is arranged along the length direction of the support plate 52; see Figure 8The second is a first drive motor 59 located on the seat frame 2. A first connecting member 51 is arranged on the drive shaft of the first drive motor 59. When the first cylinder 58 and the first drive motor 59 are selected, the structure of the first connecting member 51 is different. The first connecting member 51 includes a first threaded rod 511 installed on the drive shaft of the first drive motor 59 and a connecting plate 512 threadedly connected to the first threaded rod 511. The first threaded rod 511 is arranged perpendicular to the surface of the connecting plate 512 in the axial direction, and the first threaded rod 511 is arranged to penetrate the connecting plate 512. The connecting plate 512 is arranged parallel to the seat frame 2. The longitudinal section 42 is rotatably connected to the connecting plate 512, and a second sliding groove 513 for the longitudinal section 42 to slide is opened on the connecting plate 512. The second sliding groove 513 is arranged along the length direction of the connecting plate 512.

[0040] like Figure 6 and Figure 7 As shown, the second driving assembly 6 preferably has two types, one of which is a second cylinder 65 located on the bottom wall of the embedding hole 23, the cylinder shaft of the second cylinder 65 is arranged along the axial direction perpendicular to the bottom wall of the seat frame plate 2, a support frame 67 is fixedly connected to the bottom wall of the embedding hole 23, the second limit tooth plate 62 is rotatably connected to the support frame 67, the second limit tooth plate 62 is connected to the cylinder shaft of the second cylinder 65 through a second connecting member 61 away from the end engaged with the toothed disc 24, the second connecting member 61 is arranged as a rotating column 68, the rotating column 68 is rotatably connected to the second limit tooth plate 62, and a first sliding groove 69 is provided on the second limit tooth plate 62 along the length direction of the second limit tooth plate 62 and for the sliding of the rotating column 68; the second is located on the bottom wall of the embedding hole 23 A second drive motor 66 is provided, and a second connecting member 61 is provided on the drive shaft of the second drive motor 66. When the second cylinder 65 and the second drive motor 66 are selected, the structure of the second connecting member 61 is different. The second connecting member 61 includes a second threaded rod 612 installed on the drive shaft of the second drive motor 66 and a connecting column 611 threadedly connected to the second threaded rod 612. The second threaded rod 612 is arranged perpendicular to the bottom wall of the seat frame plate 2 along the axial direction, and the second threaded rod 612 passes through the connecting column 611. The connecting column 611 is rotatably connected to the second limiting tooth plate 62, and a second sliding groove 63 is opened on the second limiting tooth plate 62 along the length direction of the second limiting tooth plate 62 for the sliding of the connecting column 611.

[0041] The working principle of the present invention is: adjust the control switch 71, the control switch 71 transmits the signal to the controller 7 through the line, the controller 7 sends a signal to the first drive component 5 and the second drive component 6, the first drive component 5 works, the first drive component 5 pushes the pull rod 4 to rotate, the pull rod 4 drives the limit block 54 to rotate, the limit block 54 drives the rotating shaft to rotate, the rotating shaft drives the second limit tooth plate 62 to rotate, so that the second limit tooth plate 62 is separated from the rack 12, thereby realizing the sliding unlocking of the truck seat; at the same time, the second drive component 6 is driven to work, the second drive component 6 drives the second limit tooth plate 62 to rotate, so that the second limit tooth plate 62 is separated from the gear plate 24, thereby realizing the rotation unlocking of the truck seat.

[0042] The working process of the first driving assembly 5 of the present invention is as follows: when the first cylinder 58 is selected to provide the driving force, the first cylinder 58 is adjusted, and the cylinder shaft of the first cylinder 58 drives the support plate 52 to move in the vertical direction, and the support plate 52 drives the pull rod 4 to move, and the pull rod 4 slides along the first sliding groove 53, and at the same time drives the pull rod 4 to rotate, and the pull rod 4 drives the limit block 54 to rotate, and the limit block 54 drives the rotating shaft to rotate, and the rotating shaft drives the first limit tooth plate 56 to rotate, so as to realize the sliding unlocking of the truck seat; when the first driving motor 59 is selected to provide the driving force, the first driving motor 59 is adjusted, and the first threaded rod 511 of the driving shaft of the first driving motor 59 rotates, and the first threaded rod 511 drives the connecting plate 512 to move in the vertical direction, and the connecting plate 512 drives the pull rod 4 to rotate, and the pull rod 4 slides along the second sliding groove 513, and at the same time drives the pull rod 4 to rotate, and the pull rod 4 drives the limit block 54 to rotate, and the limit block 54 drives the rotating shaft to rotate, and the rotating shaft drives the first limit tooth plate 56 to rotate, so as to realize the sliding unlocking of the truck seat.

[0043] The working process of the second driving component 5 of the present invention is as follows: when the second cylinder 65 is selected to provide the driving force, the second cylinder 65 is driven, and the cylinder shaft of the second cylinder 65 drives the support frame 67 to move in the vertical direction, and the support frame 67 slides along the first sliding groove 69, and at the same time, the support frame 67 drives the second limiting tooth plate 62 to rotate, so that the meshing part of the second limiting tooth plate 62 and the toothed disc 24 is separated from the toothed disc 24, thereby realizing the rotation unlocking of the truck seat; when the first cylinder 58 is selected to provide the driving force, the second driving motor 66 is driven, and the driving shaft of the second driving motor 66 drives the second threaded rod 612 to rotate, and the second threaded rod 612 drives the connecting column 611 to move in the vertical direction, and the connecting column 611 slides along the second sliding groove 63, and at the same time, the connecting column 611 drives the second limiting tooth plate 62 to rotate, so that the meshing part of the second limiting tooth plate 62 and the toothed disc 24 is separated from the toothed disc 24, thereby realizing the rotation unlocking of the truck seat.

[0044] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An unlocking mechanism for a truck seat, comprising a seat base (1), a seat frame (2) located above the seat base (1), and a seat body (3) located on the seat frame (2), characterized in that: Guide rails (11) are arranged on both sides of the seat base (1) and are located on the seat base (1) and along the length direction of the seat base (1); a slide rail (21) that can slide along the guide rail (11) is arranged on the seat frame plate (2); a rack (12) is arranged on one side of the two slide rails (21) close to each other; the rack (12) is arranged along the length direction of the slide rail (21); a limit block (54) is arranged on the two guide rails (11); the limit block (54) is rotatably connected to the guide rail (11) through a rotating shaft; a first limit tooth plate (56) that can mesh with the rack (12) is arranged at one end of the rotating shaft away from the limit block (54); a pull rod (4) is arranged between the two limit blocks (54); and a first driving member (56) for driving the pull rod (4) to rotate is arranged on the pull rod (4). The seat body (3) comprises a turntable (31) disposed below the seat body (3), a toothed disc (24) disposed on the side of the turntable (31) away from the seat body (3), the toothed disc (24) and the turntable (31) being arranged concentrically, an embedding hole (23) for the turntable (31) to be embedded, a second position-limiting toothed plate (62) that can mesh with the toothed disc (24) is disposed in the embedding hole (23), a second driving component (6) for driving the second position-limiting toothed plate (62) to rotate is also disposed in the embedding hole (23), a controller (7) is disposed on the seat base (1), a control switch (71) is disposed on the seat body (3), and the control switch (71), the controller (7), the first driving component (5) and the second driving component (6) are connected via a line; The pull rod (4) is arranged in a U shape, and comprises a first transverse section (41), a longitudinal section (42) and a second transverse section (43) which are arranged integrally and connected in sequence, and the longitudinal section (42) is connected to the first driving assembly (5); The first driving assembly (5) comprises a first cylinder (58) or a first driving motor (59) located on the seat frame (2); the cylinder shaft of the first cylinder (58) and the driving shaft of the first driving motor (59) are both arranged perpendicular to the bottom wall of the seat frame (2) along the axial direction; the cylinder shaft of the first cylinder (58) and the driving shaft of the first driving motor (59) are connected to the middle position of the longitudinal section (42) through a first connecting member (51); and the first connecting member (51) is rotationally connected to the longitudinal section (42); The second driving assembly (6) comprises a second cylinder (65) or a second driving motor (66) located on the bottom wall of the embedding hole (23); the cylinder shaft of the second cylinder (65) and the driving shaft of the second driving motor (66) are both arranged perpendicular to the bottom wall of the seat frame (2) along the axial direction; a support frame (67) is supported in the embedding hole (23); the second position-limiting tooth plate (62) is rotatably connected to the support frame (67); the end of the second position-limiting tooth plate (62) away from the rotatably connected to the toothed disc (24) is connected to the cylinder shaft of the second cylinder (65) or the second driving motor (66) through a second connecting member (61); the second connecting member (61) is rotatably connected to the second position-limiting tooth plate (62); The first position-limiting tooth plate (56) is provided with a first spring leaf (57) for causing the first position-limiting tooth plate (56) to mesh with the rack (12); one end of the first spring leaf (57) is connected to the first position-limiting tooth plate (56), and the other end is connected to the slide rail (21); The second position-limiting tooth plate (62) is provided with a second spring leaf (64) for causing the second position-limiting tooth plate (62) to mesh with the toothed disc (24); one end of the second spring leaf (64) is connected to the second position-limiting tooth plate (62), and the other end is connected to the seat frame plate (2).

2. The unlocking mechanism of a truck seat according to claim 1, characterized in that: An opening groove (55) is provided on one side of the two limit blocks (54) close to each other, and the first transverse section (41) and the second transverse section (43) are inserted into the opening groove (55).

3. The unlocking mechanism of a truck seat according to claim 1, characterized in that: A bearing (22) is installed in the embedded hole (23); the inner ring of the bearing (22) is sleeved on the outer periphery of the turntable (31) and is interference fit with the turntable (31); the outer ring of the bearing (22) is interference fit with the hole wall of the embedded hole (23).

Images