CN211139089U - Unlocking mechanism of truck seat - Google Patents

Abstract

The utility model relates to a car seat technical field's an unlocking mechanism of truck seat, including the seat base, seat frame board and seat body, be equipped with the guide rail on the seat base, be equipped with the slide rail on the seat frame board, be provided with the rack on the slide rail, be equipped with the stopper on the guide rail, the stopper rotates through pivot and guide rail to be connected, be equipped with first spacing pinion rack in the pivot, be equipped with the pull rod on the stopper, be equipped with first drive assembly on the pull rod, be provided with the revolving stage on the seat body, be provided with the fluted disc on the revolving stage, the hole has been seted up on the seat frame board, inlay the downthehole spacing pinion rack of second that is equipped with, inlay still be equipped with second drive assembly in the hole, the seat base is equipped with the controller, be equipped with control switch on the seat. The unlocking mechanism of the designed truck seat has the advantages that the seat body can be unlocked when rotating and sliding, convenience and practicability in adjustment of the seat body are improved, and the operation is simple.

Description

Unlocking mechanism of truck seat

Technical Field

The utility model belongs to the technical field of car seat technique and specifically relates to an unlocking mechanism of truck seat is related to.

Background

At present, the user is more and more high to the performance requirement of car, and is also more and more high to the requirement of car comfort level simultaneously, and car seat is as the most audio-visual embodiment of car comfort level, and is more and more high to its required performance, and a good seat can not only improve user's comfort level, can also let navigating mate's flexibility ratio by a wide margin improve to a certain extent car, nevertheless at the driving process, and navigating mate needs adjust the seat according to individual requirement and custom, improves the comfort level.

Chinese patent No. CN107361732B discloses an unlocking mechanism for a car seat, which includes a handle housing, the handle housing is hollow and has a locking side and an unlocking side which are oppositely arranged, and a curved groove which is bent downward from the locking side to the unlocking side is arranged at the upper part of the sidewall of the handle housing between the locking side and the unlocking side; the unlocking handle is arranged in the handle shell, the upper part of the unlocking handle is provided with a sliding piece, and the sliding piece is arranged in the curved groove in a sliding manner and is provided with the unlocking handle to move along the curved groove; the wire harness head of the unlocking wire harness is connected with the unlocking handle and moves to the unlocking side along with the unlocking handle to trigger the unlocking device; the handle shell is provided with a through hole for the unlocking wire harness to penetrate 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 pivoted with the pivot at the lower part of the unlocking handle; the reset element is arranged between the crank and the unlocking handle and applies reset force for separating the crank and the unlocking handle from each other when the crank and the unlocking handle rotate in opposite directions and approach each other.

This car seat release mechanism during operation promotes the unblock handle, the sliding part is along curving groove downstream, the sliding part in-process that slides, the unblock handle can exert a decurrent effort to the crank, the crank can be along round pin axle around handle housing downwardly rotating, the contained angle between the lower part of unblock handle and the crank second end will diminish gradually this moment, the crank draws close together with the unblock handle in opposite directions promptly, reset element receives the extrusion force of crank and unblock handle this moment, the unblock handle is outwards tensile at the motion in-process unblock pencil simultaneously, complete unblock position department when the sliding part moves to curving groove leftmost end promptly, the unblock pencil is in complete stretching state, car seat is in complete unblock state this moment.

Above-mentioned technical scheme is at the during operation, and this car seat only is provided with the regulation of sliding of horizontal direction, only carries out the unblock to the regulation of sliding, and the practicality is lower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an unlocking mechanism of truck seat can realize the rotatory and gliding unblock in time of seat body, improves convenience and the practicality that the seat body was adjusted, and its easy operation.

The above object of the present invention can be achieved by the following technical solutions:

an unlocking mechanism of a truck seat comprises a seat base, a seat frame plate and a seat body, wherein the seat frame plate is positioned above the seat base, the seat body is positioned on the seat frame plate, guide rails which are positioned on the seat base and along the length direction of the seat base are arranged on the two sides close to the seat base, a slide rail capable of sliding along the guide rails is arranged on the seat frame plate, a rack is arranged on one side of the two slide rails close to each other, the rack is arranged along the length direction of the slide rail, limit blocks are arranged on the two guide rails, the limit blocks are rotationally connected with the guide rails through a rotating shaft, a first limit toothed plate capable of being meshed with the rack is arranged at one end, away from the limit blocks, of the rotating shaft, a pull rod is arranged between the two limit blocks, a first driving assembly for driving the pull rod to rotate is arranged on the pull rod, a rotary table is, the fluted disc sets up with the revolving stage is concentric, the confession has been seted up on the seat frame board the hole of inlaying of revolving stage gomphosis, inlay the downthehole setting can with the spacing pinion rack of fluted disc meshed second, still be provided with the drive in the inlay hole the spacing pinion rack pivoted second drive assembly of second, the seat base is provided with the controller, be provided with control switch on the seat body, control switch, controller, first drive assembly pass through line connection with the second drive assembly.

Through the implementation of the technical scheme, when the truck seat is unlocked, the control switch is adjusted, the control switch transmits signals to the controller through a circuit, the controller sends signals to the first driving assembly and the second driving assembly, the first driving assembly works, the first driving assembly pushes the pull rod to rotate, the pull rod drives the limiting block to rotate, the limiting block drives the rotating shaft to rotate, the rotating shaft drives the limiting second limiting toothed plate to rotate, so that the limiting second limiting toothed plate is separated from the rack, sliding unlocking of the truck seat is realized, when the second driving assembly works, the second driving assembly drives the second limiting toothed plate to rotate, so that the second limiting toothed plate is separated from the fluted disc, and rotary unlocking of the truck seat is realized; the unlocking mechanism of the designed truck seat can realize the unlocking of the seat body when the seat body rotates and slides, improves the convenience and the practicability of the adjustment of the seat body, and is simple to operate.

The utility model discloses further set up to, the pull rod is the U-shaped setting, just the pull rod includes integrative first horizontal section, vertical section and the horizontal section of second that sets up and connect gradually, vertical section is connected with first drive assembly.

Through implementing above-mentioned technical scheme, be the pull rod that the U type set up, be convenient for pull rod and stopper and first drive assembly's connection.

The utility model discloses further set up to, two the stopper is close to one side each other and has seted up the open slot, first horizontal section is worn to locate in the open slot with the horizontal section of second.

Through implementing above-mentioned technical scheme, the stopper of opening design can carry out spacingly to first horizontal section and second horizontal section, realizes pull rod and rack simultaneous movement.

The utility model discloses further set up to, first drive assembly is including being located first cylinder or a driving motor on the seat deckle board, the cylinder axle of first cylinder with first driving motor's drive shaft is all perpendicular along the axis direction seat deckle board diapire sets up, the cylinder axle of first cylinder with first driving motor's drive shaft is connected through first connecting piece and vertical section intermediate position department, first connecting piece rotates with vertical section to be connected.

Through the implementation of the technical scheme, the first air cylinder or the first driving motor is adjusted, the air cylinder shaft of the first air cylinder or the motor shaft of the first driving motor drives the first connecting piece to move, the first connecting piece drives the pull rod to move along the vertical direction and simultaneously drives the pull rod to rotate, the pull rod drives the limiting block to rotate, the limiting block drives the rotating shaft to rotate, the rotating shaft drives the first limiting toothed plate to rotate, and the sliding unlocking of the truck seat is realized; the designed first driving assembly is convenient for driving the pull rod to rotate and provides driving force for sliding unlocking of the truck seat.

The utility model discloses further set up to, the second drive assembly is including being located inlay second cylinder or second driving motor on the hole diapire, the cylinder shaft of second cylinder and second driving motor's drive shaft is all perpendicular along the axis direction seat frame board diapire sets up, it has the support frame to inlay downthehole support, the spacing pinion rack of second with the support frame rotates to be connected, the spacing pinion rack of second keep away from with the fluted disc rotate be connected one end pass through the second connecting piece with the cylinder shaft of second cylinder or second drive the driving point and connect, the second connecting piece rotates with the spacing pinion rack of second and is connected.

Through the implementation of the technical scheme, the second cylinder or the second driving motor is driven, the cylinder shaft of the second cylinder or the driving shaft of the second driving motor drives the second connecting piece to move, and the second connecting piece drives the second limiting toothed plate to rotate, so that the meshing part of the second limiting toothed plate and the toothed plate is separated from the toothed plate, and the rotary unlocking of the truck seat is realized; the second drive assembly of design is convenient for provide drive power to the second limit tooth plate for the second limit tooth plate rotates, and then realizes the rotatory unblock of truck seat.

The utility model discloses further set up to, install the bearing in the embedded hole, the inner circle cover of bearing is located the revolving stage periphery and with revolving stage interference fit, bearing inner race and embedded hole pore wall interference fit.

Through implementing above-mentioned technical scheme, the bearing of design can reduce the frictional force between revolving stage and the hole wall of inlaying, and the seat body of the truck seat of being convenient for is rotatory.

The utility model discloses further set up to, be provided with the messenger on the first limit tooth plate with the rack tends to the first reed of meshing, first reed one end with first limit tooth plate is connected, the other end with sliding connection.

Through implementing above-mentioned technical scheme, the first reed of design can be to first spacing pinion rack application of force, makes first spacing pinion rack and rack toothing under the normality, realizes the locking that slides of truck seat.

The utility model discloses further set up to, be provided with the messenger on the spacing pinion rack of second with the fluted disc tends towards the engaged second reed, second reed one end with the spacing pinion rack of second is connected, the other end with the seat frame board is connected.

Through implementing above-mentioned technical scheme, the second reed of design can be to the spacing pinion rack application of force of second, makes the spacing pinion rack of second mesh with the fluted disc under the normality, realizes the rotation locking of truck seat.

To sum up, the utility model discloses following beneficial effect has:

the unlocking mechanism of the truck seat is designed, so that the seat body can be unlocked while rotating and sliding, the convenience and the practicability of the adjustment of the seat body are improved, and the operation is simple;

the unlocking mechanism of the truck seat is characterized in that a first reed is designed, and can apply force to a first limiting toothed plate, so that the first limiting toothed plate is normally meshed with a rack, and the sliding locking of the truck seat is realized; the second reed of design can be to the spacing pinion rack application of force of second, makes the spacing pinion rack of second mesh with the fluted disc under the normality, realizes the rotation locking of truck seat.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is another schematic view of the overall structure of the embodiment of the present invention.

Fig. 3 is a sectional view taken along the plane a-a of fig. 2.

Fig. 4 is an enlarged schematic view of a portion B of fig. 3.

Fig. 5 is a cross-sectional view taken along plane C-C of fig. 2.

Fig. 6 is an enlarged schematic view of a portion D of fig. 5.

Fig. 7 is a schematic partial structural diagram of an embodiment of the present invention, which is intended to illustrate a second driving cylinder in a second driving assembly and a second connecting member thereof.

Fig. 8 is a schematic partial structural diagram of an embodiment of the present invention, which is intended to illustrate a first driving motor in a first driving assembly and a first connecting member thereof.

Reference numerals: 1. a seat base; 11. a guide rail; 12. a rack; 2. a seat frame plate; 21. a slide rail; 22. a bearing; 23. embedding holes; 24. a fluted disc; 3. a seat body; 31. a turntable; 4. a pull rod; 41. a first transverse segment; 42. a longitudinal segment; 43. a second transverse segment; 5. a first drive assembly; 51. a first connecting member; 511. a first threaded rod; 512. a connecting plate; 513. a second sliding groove; 52. a support plate; 53. a first sliding groove; 54. a limiting block; 55. an open slot; 56. a first limit toothed plate; 57. a first reed; 58. a first cylinder; 59. a first drive motor; 6. a second drive assembly; 61. a second connecting member; 611. connecting columns; 612. a second threaded rod; 62. a second limit toothed plate; 63. a second sliding groove; 64. a second reed; 65. a second cylinder; 66. a second drive motor; 67. a support frame; 68. rotating the column; 69. a first sliding groove; 7. a controller; 71. and controlling the switch.

Detailed Description

The technical solution of the embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, an unlocking mechanism for a truck seat comprises a seat base 1, a seat frame plate 2 located above the seat base 1, and a seat body 3 located on the seat frame plate 2, wherein 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 capable of sliding along the guide rails 11 are installed on the seat frame plate 2, a rack 12 is fixedly connected to one side of each of the two slide rails 21 near to each other, the rack 12 is arranged along the length direction of the slide rails 21, referring to fig. 3 and 4, a limiting block 54 is installed on each of the two guide rails 11, the limiting block 54 is rotatably connected with the guide rails 11 through a rotating shaft, a first limiting toothed plate 56 capable of meshing with the rack 12 is fixedly connected to one end of the rotating shaft far away from the limiting block 54, a first spring plate 57 enabling the first limiting toothed plate 56 and the rack 12 to tend to mesh is installed on the first limiting toothed plate 56, one, the other end of the connecting rod is connected with the sliding rail 21, a pull rod 4 is arranged between the two limit blocks 54, a first driving component 5 for driving the pull rod 4 to rotate is arranged on the pull rod 4, referring to fig. 5 and 6, a rotary table 31 is fixedly connected below the seat body 3, a fluted disc 24 is fixedly connected to one side of the rotary table 31 far away from the seat body 3, the fluted disc 24 and the rotary table 31 are concentrically arranged, an embedding hole 23 for embedding the rotary table 31 is formed in one side of the seat frame plate 2 close to the seat body 3, a bearing 22 is installed in the embedding hole 23, an inner ring of the bearing 22 is sleeved on the periphery of the rotary table 31 and is in interference fit with the rotary table 31, an outer ring of the bearing 22 is in interference fit with the hole wall of the embedding hole 23, a second limit toothed plate 62 capable of being meshed with the fluted disc 24 is installed in the embedding hole 23, a second driving component 6 for driving the second limit toothed plate 62 to rotate is also installed in the embedding, one end of the second reed 64 is connected with the second limit toothed plate 62, the other end of the second reed is connected with the seat frame plate 2, the seat base 1 is provided with the controller 7, the seat body 3 is provided with the 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 circuit.

As shown in fig. 3 and 4, the pull rod 4 is U-shaped, 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 sequentially connected, the longitudinal section 42 is connected with the first driving component 5, an open slot 55 is formed on one side of the two limit blocks 54 which are close to each other, and the first transverse section 41 and the second transverse section 43 are arranged in the open slot 55 in a penetrating manner.

As shown in fig. 6, the first driving assembly 5 preferably has two types, one of the two types is a first air cylinder 58 located on the seat frame plate 2, an air cylinder shaft of the first air cylinder 58 is arranged perpendicular to the bottom wall of the seat frame plate 2 along the axial direction, an air cylinder shaft end of the first air cylinder 58 is rotatably connected with the middle position of the longitudinal section 42 through a first connecting member 51, the first connecting member 51 includes a supporting plate 52, a first sliding groove 53 for the longitudinal section 42 to slide is formed in the supporting plate 52, and the first sliding groove 53 is arranged along the length direction of the supporting plate 52; referring to fig. 8, the second is the first driving motor 59 located on the seat frame plate 2, the driving shaft of the first driving motor 59 is provided with a first connecting member 51, when the first cylinder 58 and the first driving 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 mounted on the driving shaft of the first driving motor 59 and a connecting plate 512 in threaded connection with the first threaded rod 511, the first threaded rod 511 is arranged perpendicular to the surface of the connecting plate 512 along the axial direction, the first threaded rod 511 penetrates through the connecting plate 512, the connecting plate 512 is arranged parallel to the seat frame plate 2, the longitudinal section 42 is rotatably connected with the connecting plate 512, the connecting plate 512 is provided with a second sliding groove 513 for the longitudinal section 42 to slide, and the second sliding groove 513 is arranged along the length direction of the connecting plate 512.

As shown in fig. 6 and 7, the second driving assembly 6 preferably has two types, one of the two types is a second cylinder 65 located on the bottom wall of the embedding hole 23, a cylinder shaft of the second cylinder 65 is arranged perpendicular to the bottom wall of the seat frame plate 2 along the axial direction, a support frame 67 is fixedly connected to the bottom wall of the embedding hole 23, the second limit toothed plate 62 is rotatably connected to the support frame 67, one end of the second limit toothed plate 62, which is far away from the end engaged with the toothed plate 24, is connected to the cylinder shaft of the second cylinder 65 through a second connecting member 61, the second connecting member 61 is provided as a rotating column 68, the rotating column 68 is rotatably connected to the second limit toothed plate 62, and a first sliding groove 69 for sliding the rotating column 68 along the length direction of the second limit toothed plate 62 is formed on the second limit toothed plate 62; secondly, be located the second driving motor 66 on the bottom wall of the embedding hole 23, be provided with the second connecting piece 61 in the drive shaft of second driving motor 66, when selecting for use second cylinder 65 and second driving motor 66, the structure of second connecting piece 61 is different, second connecting piece 61 is including installing the second threaded rod 612 on the motor shaft of second driving motor 66 and the spliced pole 611 with second threaded rod 612 threaded connection, the perpendicular seat frame board 2 diapire setting of axis direction of second threaded rod 612, and second threaded rod 612 runs through the spliced pole 611 setting, spliced pole 611 rotates with the spacing pinion rack 62 of second and is connected, and set up the second sliding groove 63 that just supplies the spliced pole 611 to slide along the spacing pinion rack 62 length direction of second on the spacing pinion rack 62 of second.

The utility model discloses a theory of operation is: the control switch 71 is adjusted, the control switch 71 transmits signals to the controller 7 through a circuit, the controller 7 sends signals to the first driving assembly 5 and the second driving assembly 6, the first driving assembly 5 works, the first driving assembly 5 pushes the pull rod 4 to rotate, the pull rod 4 drives the limiting block 54 to rotate, the limiting block 54 drives the rotating shaft to rotate, the rotating shaft drives the limiting second limiting toothed plate 62 to rotate, so that the second limiting toothed plate 62 is separated from the rack 12, and the sliding unlocking of the truck seat is realized; meanwhile, the second driving assembly 6 is driven to work, and the second driving assembly 6 drives the second limiting toothed plate 62 to rotate, so that the second limiting toothed plate 62 is separated from the fluted disc 24, and the rotary unlocking of the truck seat is realized.

The utility model discloses the working process of first drive assembly 5 does: when the first air cylinder 58 is selected to provide driving force, the first air cylinder 58 is adjusted, an air cylinder shaft of the first air cylinder 58 drives the supporting plate 52 to move in the vertical direction, the supporting plate 52 drives the pull rod 4 to move, the pull rod 4 slides along the first sliding groove 53 and simultaneously drives the pull rod 4 to rotate, the pull rod 4 drives the limiting block 54 to rotate, the limiting block 54 drives the rotating shaft to rotate, and the rotating shaft drives the first limiting toothed plate 56 to rotate, so that the sliding unlocking of the truck seat is realized; when selecting for use first driving motor 59 to provide drive power, adjust first driving motor 59, the first threaded rod 511 of the drive shaft of first driving motor 59 rotates, first threaded rod 511 drives connecting plate 512 and moves along vertical direction, connecting plate 512 drives pull rod 4 and rotates, pull rod 4 slides along second sliding tray 513, drive pull rod 4 simultaneously and rotate, pull rod 4 drives stopper 54 and rotates, stopper 54 drives the pivot and rotates, the pivot drives first limit toothed plate 56 and rotates, realize the slip unblock of truck seat.

The utility model discloses second drive assembly 5's working process does: when the second cylinder 65 is selected to provide driving force, the second cylinder 65 is driven, a cylinder shaft of the second cylinder 65 is driven to drive the support frame 67 to move along the vertical direction, the support frame 67 slides along the first sliding groove 69, and meanwhile, the support frame 67 drives the second limit toothed plate 62 to rotate, so that the meshing part of the second limit toothed plate 62 and the toothed disc 24 is separated from the toothed disc 24, and the rotary unlocking of the truck seat is realized; when the first air cylinder 58 is selected to provide driving force, the second driving motor 66 is driven, the driving shaft of the second driving motor 66 drives the second threaded rod 612 to rotate, the second threaded rod 612 drives the connecting column 611 to move in the vertical direction, the connecting column 611 slides along the second sliding groove 63, and meanwhile the connecting column 611 drives the second limiting toothed plate 62 to rotate, so that the meshing part of the second limiting toothed plate 62 and the toothed plate 24 is separated from the toothed plate 24, and the rotary unlocking of the truck seat is realized.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The unlocking mechanism of the truck seat comprises a seat base (1), a seat frame plate (2) and a seat body (3), wherein the seat frame plate (2) is located above the seat base (1), the seat body (3) is located on the seat frame plate (2), the unlocking mechanism is characterized in that guide rails (11) are arranged on the seat base (1) and along the length direction of the seat base (1) and close to the two sides of the seat base (1), slide rails (21) capable of sliding along the guide rails (11) are arranged on the seat frame plate (2), racks (12) are arranged on one sides, close to one side, of the slide rails (21), the slide rails (21) are arranged in the length direction, limit blocks (54) are arranged on the guide rails (11), the limit blocks (54) are rotatably connected with the guide rails (11) through rotating shafts, one end, far away from the limit blocks (54), of the rotating shafts is provided with a first limit toothed plate (56) capable of being meshed with the racks, two be provided with pull rod (4) between stopper (54), be provided with the drive on pull rod (4) pivoted first drive assembly (5), seat body (3) below is provided with revolving stage (31), revolving stage (31) are kept away from seat body (3) one side is provided with fluted disc (24), fluted disc (24) and revolving stage (31) concentric setting, set up on seat frame board (2) and supply inlay hole (23) of revolving stage (31) gomphosis, set up in inlay hole (23) can with fluted disc (24) meshing second limit teeth board (62), still be provided with drive in inlay hole (23) second drive assembly (6) that second limit teeth board (62) rotated, seat base (1) is provided with controller (7), be provided with control switch (71) on seat body (3), the control switch (71), the controller (7), the first driving assembly (5) and the second driving assembly (6) are connected through lines.

2. The unlocking mechanism of a truck seat according to claim 1, wherein the pull rod (4) is provided in a U-shape, and the pull rod (4) comprises a first transverse section (41), a longitudinal section (42) and a second transverse section (43) which are integrally and sequentially connected, and the longitudinal section (42) is connected with the first driving assembly (5).

3. The unlocking mechanism for the truck seat as claimed in claim 2, wherein an open slot (55) is formed at a 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 open slot (55).

4. The unlocking mechanism for the truck seat as recited in claim 2, wherein the first driving assembly (5) comprises a first air cylinder (58) or a first driving motor (59) which is positioned on the seat frame plate (2), the cylinder shaft of the first air cylinder (58) and the driving shaft of the first driving motor (59) are both arranged perpendicular to the bottom wall of the seat frame plate (2) along the axial direction, the cylinder shaft of the first air cylinder (58) and the driving shaft of the first driving motor (59) are connected with the longitudinal section (42) at the middle position through a first connecting piece (51), and the first connecting piece (51) is rotatably connected with the longitudinal section (42).

5. The unlocking mechanism of the truck seat as recited in claim 1, wherein the second driving assembly (6) comprises a second cylinder (65) or a second driving motor (66) which is located on the bottom wall of the embedding hole (23), a cylinder shaft of the second cylinder (65) and a driving shaft of the second driving motor (66) are both arranged perpendicular to the bottom wall of the seat frame plate (2) along an axial direction, a supporting frame (67) is supported in the embedding hole (23), the second limit toothed plate (62) is rotatably connected with the supporting frame (67), one end of the second limit toothed plate (62) away from the end rotatably connected with the toothed plate (24) is connected with the cylinder shaft of the second cylinder (65) or the second driving motor (66) through a second connecting piece (61), and the second connecting piece (61) is rotatably connected with the second limit toothed plate (62).

6. The unlocking mechanism of the truck seat as claimed in claim 1, wherein a bearing (22) is installed in the embedding hole (23), an inner ring of the bearing (22) is sleeved on the periphery of the turntable (31) and is in interference fit with the turntable (31), and an outer ring of the bearing (22) is in interference fit with a hole wall of the embedding hole (23).

7. An unlocking mechanism for a truck seat according to claim 1, characterized in that the first limit tooth plate (56) is provided with a first spring plate (57) tending to engage the first limit tooth plate (56) with the rack (12), the first spring plate (57) being connected at one end to the first limit tooth plate (56) and at the other end to the slide rail (21).

8. The unlocking mechanism of a truck seat according to claim 1, characterized in that the second limit toothed plate (62) is provided with a second spring plate (64) which tends to mesh the second limit toothed plate (62) with the toothed plate (24), and one end of the second spring plate (64) is connected with the second limit toothed plate (62) and the other end is connected with the seat frame plate (2).

Images