CN211391026U

CN211391026U - Automatic unlocking device of seat and seat

Info

Publication number: CN211391026U
Application number: CN201921596944.4U
Authority: CN
Inventors: 管国朋; 武帅京; 崔崇桢; 李建平
Original assignee: Zhengzhou Yutong Bus Co Ltd
Current assignee: Yutong Bus Co Ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-09-01
Anticipated expiration: 2029-09-24

Abstract

The utility model relates to a vehicle seat technical field, in particular to automatic unlocking device of seat and seat. The seat comprises a seat body, a front and back adjusting handle and an automatic seat unlocking device, wherein the front and back adjusting handle is used for controlling the seat to be switched between a locking state and a free state; when the electromagnetic driving device is started, the sliding block moves along the installation seat in a guiding way under the action of a magnetic field force, and the sliding block drives the front and back adjusting handle to move through the flexible traction body so as to enable the seat to be switched to a free state. The seat is used for solving the problem that the existing danger avoiding device is complex in structure.

Description

Automatic unlocking device of seat and seat

Technical Field

The utility model relates to a vehicle seat technical field, in particular to automatic unlocking device of seat and seat.

Background

In a traffic accident, the living space of a driver is easy to change due to the deformation of a vehicle body, the driver is easy to be extruded and seriously injured, the living space of the driver is increased when the traffic accident happens, and the injury degree of the driver can be reduced to a certain degree.

The utility model patent document with the publication number of CN207257445U describes an active danger avoiding device for a driver seat of a passenger car, which comprises a sensor for judging whether a traffic accident occurs, a plurality of retractors fixed on a front axle frame, and a plurality of furling webbings with one end connected with the retractors and the other end connected with different positions of the seat, wherein the furling webbings comprise a first furling webbings connected with a handle for adjusting the seat, a second furling webbings connected with a seat back and a third furling webbings connected with a seat slide rail; the retractor comprises a gas generator, a pipeline, steel balls, a steel ball baffle groove, a braid reel and a rotor, wherein the braid reel and the rotor are coaxially arranged and in transmission connection; this keep away dangerous ware when using, when the vehicle takes place the traffic accident when the sensor is sensed to the vehicle, to controller transmission signal, the gunpowder in the gas generator in the coiler that controller control and first roll-up meshbelt are connected explodes, the high-pressure gas that the explosion produced promotes the steel ball and moves in the pipeline, and then striking steel ball catch groove and promote rotor and meshbelt spool and rotate, thereby realize the roll-up of roll-up meshbelt, the in-process of roll-up meshbelt roll-up drives the handle action, realize the unblock of seat, the coiler action that links to each other with third roll-up meshbelt simultaneously, third roll-up meshbelt roll-up, the pulling seat removes backward, thereby realize increase driver's living space.

After the danger avoiding device in the patent document controls the seat to move backwards, the seat is prevented from rebounding forwards through the self-locking function of the retractor, and the structure of the whole danger avoiding device is complex due to the self-locking structure arranged in the retractor; in addition, high-pressure gas generated by a gas generator of the retractor acts on the steel balls firstly, then the steel balls are pushed to collide with the steel ball retaining grooves, and the rotor is further pushed to rotate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automatic unlocking device for a seat, which is used for solving the problem that the existing danger avoiding device has a complex structure; the utility model also provides an use above-mentioned automatic unlocking device of seat's seat.

In order to achieve the above object, the utility model provides an automatic unlocking device of seat adopts following technical scheme:

the automatic seat unlocking device comprises a mounting seat and an electromagnetic driving device, wherein the mounting seat is used for being fixed on a seat, the electromagnetic driving device is arranged on the mounting seat, a movable part of the electromagnetic driving device is a sliding block, the sliding block is connected with a flexible traction body which cannot be elastically stretched, and the other end of the flexible traction body is used for being connected with a front-back adjusting handle for controlling the seat to be switched between a locking state and a free state; when the electromagnetic driving device is started, the sliding block moves along the installation seat in a guiding way under the action of a magnetic field force, and the sliding block drives the front-back adjusting handle to move through the flexible traction body so as to enable the seat to be switched to a free state.

The utility model provides an automatic unlocking device of seat's beneficial effect is: the automatic seat unlocking device generates magnetic field force when the electromagnetic driving device is started, the sliding block is magnetized firstly and then moves along the installation base in a guiding mode under the action of the magnetic field force, the flexible traction body can be pulled to move in the moving process of the sliding block, and then the front and back adjusting handles are pulled to move so that the seat is switched from a locking state to a free state; the automatic seat unlocking device can reasonably set the starting time of the electromagnetic driving device, when the magnetic field force disappears, the sliding block loses the power for moving to the fixed part far away from the electromagnetic driving device, at the moment, the front and back adjusting handle can act under the action of the self resilience force to enable the seat to be switched to a locking state, or the length of the mounting seat can be reasonably set, so that the sliding block can be separated from the mounting seat in the moving process, at the moment, the effect of the magnetic field force generated by the electromagnetic driving device on the sliding block is weakened, and the front and back adjusting handle can act under the action of the self resilience force to enable the seat to be switched to the locking state; in a word, the seat automatic unlocking device can control the seat to be switched from the locking state to the free state, and can also realize the switching of the seat from the free state to the locking state by utilizing the front-back adjusting handle and the self-locking structure of the seat.

Further, the mount pad has the removal passageway that supplies the slider to remove, and the slider receives magnetic field force to do all can the guide to move in removal passageway, and the mount pad is seted up along removal passageway length extending direction with the uncovered that removal passageway corresponds, and flexible traction body passes uncovered and slider fixed connection. The installation seat is provided with the moving channel, and the sliding block is guided to move in the moving channel, so that the structure is simple and easy to realize; set up uncovered on the mount pad, can reduce the slider and remove the resistance that the in-process flexible traction body received, and then guarantee that the front and back adjustment handle can be pulled smoothly.

Further, the slider is a magnetic slider. Set up like this, can strengthen the magnetic field force that the slider received for it is more reliable that the front and back regulation handle is pulled.

Furthermore, the flexible traction body is a woven belt. The ribbon has good flexibility and light texture.

The utility model provides a seat adopts following technical scheme:

the seat comprises a seat body, a front and back adjusting handle and an automatic seat unlocking device, wherein the front and back adjusting handle is used for controlling the seat to be switched between a locking state and a free state; when the electromagnetic driving device is started, the sliding block moves along the installation seat in a guiding way under the action of a magnetic field force, and the sliding block drives the front-back adjusting handle to move through the flexible traction body so as to enable the seat to be switched to a free state.

The utility model provides a beneficial effect of seat is: the automatic seat unlocking device of the seat generates magnetic field force when the electromagnetic driving device is started, the sliding block is magnetized firstly and then moves along the installation seat in a guiding mode under the action of the magnetic field force, the flexible traction body can be pulled to move in the moving process of the sliding block, and then the front and back adjusting handle is pulled to move so that the seat is switched from a locking state to a free state; the automatic seat unlocking device can reasonably set the starting time of the electromagnetic driving device, when the magnetic field force disappears, the sliding block loses the power for moving to the fixed part far away from the electromagnetic driving device, at the moment, the front and back adjusting handle can act under the action of the self resilience force to enable the seat to be switched to a locking state, or the length of the mounting seat can be reasonably set, so that the sliding block can be separated from the mounting seat in the moving process, at the moment, the effect of the magnetic field force generated by the electromagnetic driving device on the sliding block is weakened, and the front and back adjusting handle can act under the action of the self resilience force to enable the seat to be switched to the locking state; in a word, the seat automatic unlocking device can control the seat to be switched from the locking state to the free state, and can also realize the switching of the seat from the free state to the locking state by utilizing the front-back adjusting handle and the self-locking structure of the seat.

Further, when the mounting seat is provided with the moving channel, the moving channel is obliquely arranged from bottom to top, from front to back when the mounting seat is fixed with the seat body. The arrangement is convenient for pulling the front and back adjusting handle, the space occupied in the vertical direction is reduced, and the arrangement of the automatic seat unlocking device is convenient.

Further, the automatic seat unlocking device is installed at the bottom of the seat body and is positioned above the front-back adjusting handle. Set up like this, can reduce the length of flexible traction body, and then make the fore-and-aft regulation handle pulled comparatively rapidly.

Furthermore, the seat also comprises a backward moving device which is used for pulling the seat body to the back when the seat body is controlled by the automatic unlocking device of the seat and is in a free state, and the backward moving device is arranged on the vehicle body when in use. By the arrangement, when a traffic accident occurs and the automatic seat unlocking device enables the seat to be switched to the free state, the backward moving device can pull the seat backward, so that the living space of a driver is increased.

Further, the backward movement device comprises a fixing seat and a movement part arranged on the fixing seat, the movement part moves along the guide of the fixing seat, the movement part is connected with a flexible traction body which cannot be elastically stretched, the other end of the flexible traction body is fixedly connected with the seat body, the backward movement device further comprises a backward movement driving device used for driving the movement of the movement part, and when the backward movement driving device is started, the movement part moves backward along the fixing seat to pull the seat body to move backward. The backward moving device is simple in structure and convenient to install.

Furthermore, the fixed seat is a rectangular cylinder, the inner cavity of the rectangular cylinder extends along the front-back direction to form a movement channel for the movement of the moving part, the front end of the rectangular cylinder is provided with a sealing plate for sealing the inner cavity, and the sealing plate is provided with a channel for the flexible traction body to pass through; the moving part, the inner cavity wall of the rectangular cylinder and the sealing plate form a closed cavity together; the backward moving driving device is a gas generator, a communicating opening is formed in the rectangular cylinder body corresponding to the closed cavity, and a gas outlet of the gas generator is in sealed communication with the inner cavity of the rectangular cylinder body through the communicating opening. The high-pressure air pressure generated by the gas generator is very high, and can quickly act on the moving part, so that the moving part can quickly respond, the living space of a driver is quickly increased, and the probability of injury to the driver is reduced; in addition, the high-pressure air generated by the gas generator directly acts on the moving piece, the moving piece drives the seat body to move backwards through the flexible traction body, an additional transmission structure is not arranged in the middle, and the energy waste is reduced.

Furthermore, clamping pieces with one ends fixed on the side walls and the other ends extending backwards and inwards are arranged on the left side wall and the right side wall of the rectangular cylinder body, positioning blocks are further arranged on the bottom plate and/or the top plate of the rectangular cylinder body, and the moving piece is restrained by the positioning blocks and the clamping pieces on the two side walls before being acted by the gas generator and is relatively fixed with the rectangular cylinder body. Thus, the noise generated by the free movement of the moving part in the rectangular cylinder can be prevented.

Furthermore, the left side surface and the right side surface of the moving piece are provided with convex ribs extending along the vertical direction, and the outer surfaces of the convex ribs are arc-shaped. The arrangement is convenient for the moving piece to move backwards through the clamping piece.

Further, on the basis that the fixing base is the technical scheme of rectangle barrel, the flexible traction body is the meshbelt, and the meshbelt has certain width in the left and right directions, is equipped with the guide structure who is used for leading the meshbelt in the passageway on the shrouding, and guide structure has the guide channel who extends along the fore-and-aft direction. The pliability of meshbelt is higher, and the texture is lighter, sets up guide structure and can prevent that the meshbelt from fold in the width direction and lead to the resistance increase between meshbelt and the shrouding, guarantees that the meshbelt can pass through the shrouding smoothly.

Furthermore, on the basis of the technical scheme that the fixing seat is a rectangular cylinder, a sealing plate for sealing the inner cavity is arranged at the rear end of the rectangular cylinder. The arrangement can prevent foreign matters from entering the inner cavity of the rectangular cylinder body to block the moving piece from smoothly moving backwards.

Drawings

Fig. 1 is a schematic structural view of an embodiment of a seat provided by the present invention;

fig. 2 is a front view of an embodiment of a seat provided by the present invention;

fig. 3 is a schematic structural diagram of an automatic unlocking device in an embodiment of a seat provided by the present invention;

fig. 4 is an exploded view of an automatic unlocking device in an embodiment of a seat provided by the present invention;

fig. 5 is a schematic structural diagram of a mounting seat of an automatic unlocking device in an embodiment of a seat provided by the present invention;

fig. 6 is a schematic structural view of a rearward moving device in an embodiment of the seat provided by the present invention;

fig. 7 is an exploded view of a rearward translation device in an embodiment of a seat provided by the present invention;

fig. 8 is a schematic view showing the cooperation of the backward moving webbing, the front sealing plate, and the moving block in the backward moving device according to the embodiment of the present invention;

FIG. 9 is a top view of the structure of FIG. 8;

fig. 10 is a partial schematic structural view of a fixing seat in an embodiment of the seat provided by the present invention;

fig. 11 is a top view of a portion of the main structure of the fixing base in an embodiment of the seat provided by the present invention;

fig. 12 is a schematic view illustrating the engagement between the movable block and the fixed seat in the embodiment of the seat provided by the present invention;

fig. 13 is a schematic view of the motion block being stopped by the clamping piece in an embodiment of the seat provided by the present invention.

In the drawings: 1-seat body, 2-front and back adjusting handle, 3-automatic unlocking device, 4-backward moving device, 5-sensor, 31-installation seat, 32-electromagnetic driving device, 33-handle braid, 41-fixing seat, 42-moving block, 43-backward moving braid, 44-fixing block, 45-gas generator, 311-coil part, 312-slider part, 313-limiting block, 321-coil, 322-slider, 411-rectangular cylinder, 412-front sealing plate, 413-back sealing plate, 421-convex rib, 3121-moving channel, 3122-opening, 4111-main body structure, 4112-cover plate, 4121-guide structure, 41111-inner cavity, 41112-communication port, 41113-positioning block and 41114-clamping piece.

Detailed Description

The following describes the present invention with reference to the accompanying drawings.

The utility model provides an embodiment of seat:

as shown in fig. 1 and 2, the seat includes a seat body 1 and a front-rear adjusting handle 2 for controlling the seat to switch between a locked state and a free state, and further includes an automatic unlocking device 3 installed at the bottom of the seat body 1 and located above the front-rear adjusting handle 2, a rearward moving device 4, and a sensor 5 for sending signals to control units of the automatic unlocking device 3 and the rearward moving device 4, and both the rearward moving device 4 and the sensor 5 are installed on a vehicle body when in use. The sensor 5 may detect whether a vehicle using the seat collides, and when the collision of the vehicle is detected, may transmit a signal to the control units of the automatic unlocking device 3 and the rearward moving device 4 to operate the automatic unlocking device 3 and the rearward moving device 4.

As shown in fig. 1-5, the automatic unlocking device 3 includes a mounting seat 31 and an electromagnetic driving device 32 installed in the mounting seat 31, the mounting seat 31 is in a state of inclining from bottom to top and from front to back when installed on the seat body 1, and the length direction thereof is inclining from bottom to top and from front to back, the mounting seat 31 is a rectangular parallelepiped structure and includes two parts of a coil part 311 and a slider part 312, wherein the coil part 311 is located at the front and the slider part 312 is located at the back, the electromagnetic driving device 32 includes a coil 321 fixed on the coil part 311 and a slider 322 capable of moving relative to the coil 321, a moving channel 3121 for moving the slider 322 is provided in the slider part 312, the moving channel 3121 extends along the length direction of the mounting seat 31, the slider 322 is capable of moving relative to the slider part 312 in the moving channel 3121, a stopper 313 is provided at the end of the moving channel 3121 of the slider part 312 close to the coil, the stopper 313 may prevent the slider 322 from moving downward at the front end of the moving passage 3121; the slider 322 in this embodiment is a magnetic slider, after the coil 321 of the electromagnetic driving device 32 is energized, the coil 321 can generate a magnetic field, and the slider 322 can move in the moving channel 3121 under the action of the magnetic field force, i.e., move upward and rearward.

As shown in fig. 1 to 4, the lower side of the slider portion 312 is provided with an open port 3122 extending along the length direction of the moving channel 3121 corresponding to the moving channel 3121, i.e., a part of the structure of the slider 322 is exposed during the movement of the slider portion within the moving channel 3121; the slider 322 is connected to the fore-and-aft adjustment handle 2 by a piece of handle webbing 33, the handle webbing 33 is not tensioned before the slider 322 moves as the slider 322 moves within the opening 3122 of the slider portion 312 during movement of the slider 322; because the slider 322 moves upward and rearward under the action of the magnetic field force, the handle webbing 33 is tensioned during the movement of the slider 322, and the forward and rearward adjustment handle 2 is pulled upward, so that the seat is switched to the free state; the handle webbing 33 constitutes a flexible traction body in the automatic unlocking device 3.

The end portion of the moving channel 3121 departing from the coil portion 311 is open, the slider 322 can be separated from the moving channel 3121 when moving to the end portion of the moving channel 3121 in the moving process, the slider 322 separated from the moving channel 3121 can fall downwards under the action of self gravity, at the moment, the upward pulling force applied to the handle webbing 33 by the slider 322 gradually disappears, the upward pulling force applied to the front and back adjusting handle 2 by the handle webbing 33 also disappears, the front and back adjusting handle 2 rebounds under the action of the rebounding structure of the front and back adjusting handle 2, and the seat is switched from the free state to the locked state.

As shown in fig. 6-13, the backward moving device 4 includes a fixed base 41, the fixed base 41 is a rectangular parallelepiped structure, and includes a rectangular cylinder 411, after the backward moving device 4 is fixed on the vehicle body, the length of the rectangular cylinder 411 extends along the front-rear direction, the rectangular cylinder 411 includes a main body structure 4111 and a cover plate 4112, the main body structure 4111 is surrounded by a bottom plate and two side wall plates, the whole is U-shaped, the cover plate 4112 is used to close the opening above the main body structure 4111 and surround the main body structure 4111 into the rectangular cylinder 411, an inner cavity 41111 of the rectangular cylinder 411 penetrates through the rectangular cylinder 411 along the length direction, a front sealing plate 412 and a rear sealing plate 413 are respectively fixed at the front end and the rear end of the rectangular cylinder 411, the front sealing plate 412 and the rear sealing plate 413 surround the inner cavity 41111 into a closed cavity, and.

As shown in fig. 6-13, the moving device 4 further includes a moving block 42 movably installed in the inner cavity 41111 of the rectangular cylinder 411, and the moving block 42 is installed in the inner cavity 41111 and encloses a closed cavity together with the front sealing plate 412 and the cavity wall of the inner cavity 41111; the moving block 42 is connected with the base body 1 through a backward moving woven belt 43, one end of the backward moving woven belt 43 is fixedly connected with the moving block 42, the other end of the backward moving woven belt 43 is connected with a fixed block 44, and the fixed block 44 is fixedly connected with the base body 1; the backward moving woven belt 43 passes through the front sealing plate 412 to be connected with the inside and the outside of the inner cavity 41111, a guide structure 4121 for guiding the backward moving woven belt 43 is arranged on the front sealing plate 412, the backward moving woven belt 43 has a certain width in the left-right direction, the guide structure 4121 is provided with a guide channel extending along the front-back direction, and the width dimension of the guide channel in the left-right direction is matched with the width dimension of the backward moving woven belt 43; the pull-back webbing 43 constitutes a flexible traction body in the pull-back device 4.

As shown in fig. 6, 7 and 10, the rearward movement means 4 further comprises a rearward movement driving means, in this embodiment a gas generator 45. A communication port 41112 is arranged on a side wall plate of the main body structure 4111 corresponding to a closed chamber defined by the moving block 42, the front sealing plate 412 and the cavity wall of the inner cavity 41111, the gas generator 45 is fixedly mounted on the main body structure 4111, and a gas outlet of the gas generator 45 is in sealed communication with the closed chamber through the communication port 41112; when the seat is used, the gas generator 45 is ignited and rapidly generates high-pressure gas, the high-pressure gas is sprayed into the closed cavity, the high-pressure gas pushes the moving block 42 to move backwards, and the moving block 42 drives the seat body 1 to move backwards through the backward moving woven belt 43 in the moving process (at the moment, the automatic unlocking device 3 enables the seat to be in a free state).

As shown in fig. 8 to 13, in order to prevent the movement of the moving block 42 in the inner cavity 41111 before the gas generator 45 is driven, two clamping tabs 41114 are respectively provided at positions close to the front ends on the inner sides of the two side wall plates of the main body structure 4111, the two clamping tabs 41114 are arranged at intervals in the front-rear direction, one side of each clamping tab 41114 is fixed to the corresponding side wall plate, the other side thereof is cantilevered inward toward the rear, and the clamping tabs 41114 are made of plastic and are deformed to abut against the side wall plates when subjected to a large pressure; a positioning block 41113 is arranged on the bottom plate of the main body structure 4111, the positioning block 41113 is arranged on the front side of the two clamping tabs 41114, before the moving block 42 is driven by the gas generator 45, the moving block 42 is fixed by the positioning block 41113, the clamping tabs 41114 and the cavity wall of the cavity at the corresponding position, and when the moving block 42 is fixed, the backward moving webbing 43 is not tensioned; the positioning block 41113 blocks the moving block 42 at the front side thereof, the cover plate 4112 and the base plate block the moving block 42 at the upper and lower sides thereof, and the locking piece 41114 blocks the moving block 42 at both sides thereof while limiting the backward movement of the moving block 42. The left side and the right side of the motion block 42 are respectively provided with two convex ribs 421 extending along the up-down direction, the two convex ribs 421 respectively correspond to one clamping piece 41114 on one side wall plate, and the matching between the clamping piece 41114 and the convex ribs 421 is used for blocking the motion block 42 from moving backwards, of course, after the gas generator 45 generates high-pressure gas, the high-pressure gas pushes the motion block 42 to move backwards, so that the blocking of the clamping piece 41114 can be overcome; the outer circumferential surface of the rib 421 is formed in an arc shape, and the arc-shaped outer circumferential surface facilitates the backward movement by the grip tab 41114 when the gas generator 45 drives the moving block 42 to move backward.

When the seat is used, when the sensor 5 detects that a vehicle collides, a signal is sent to the control unit of the automatic unlocking device 3, the coil 321 of the electromagnetic driving device 32 in the automatic unlocking device 3 is electrified to generate a magnetic field, so that the sliding block 322 is pushed to move backwards and upwards, and the front-back adjusting handle 2 is pulled to move to realize that the seat is switched to a free state; meanwhile, the sensor 5 also sends a signal to the control unit of the backward movement device 4, after the seat is switched to the free state, the control unit of the backward movement device 4 controls the gas generator 45 to ignite and generate high-pressure gas, the high-pressure gas pushes the motion block 42 to overcome the clamping sheet 41114 and move backward, and further pulls the seat body 1 to move backward, so that the living space of a driver is increased; the time for the sliding block 322 to move in the moving channel 3121 of the installation seat 31, that is, the time for controlling the seat to be in the free state, is reasonably set, when the seat body 1 is pulled to the rear setting position by the rearward movement device 4, the sliding block 322 is separated from the moving channel 3121, the front and rear adjusting handle 2 rebounds, and the seat is switched to the locking state. During the backward movement of the moving block 42 in the rearward moving device 4, the moving block 42 breaks the rear sealing plate 413 and is separated from the fixed seat 41.

In the above embodiment, the pulling force on the handle webbing is gradually removed after the slider is disengaged from the moving channel, and the fore-and-aft adjustment handle begins to rebound. In other embodiments, the slider also can move in the removal passageway all the time, when needs seat switch to the locking state, can control the coil outage, perhaps the coil communicates reverse electricity, and under this kind of circumstances, the fore-and-aft regulation handle loses the ascending power of pulling of slider, kick-backs under the effect of its self resilience power, can realize that the seat switches to the locking state.

In the above embodiment, the mounting seat is provided with the moving channel, and the slider is guided to move in the moving channel. In other embodiments, the mounting seat may also be provided with a guide rail, the slider may be provided with a guide groove, and the slider may be guided and moved on the mounting seat by the cooperation of the guide rail and the guide groove, and may also be used.

In the above embodiment, the mounting seat is provided with an opening corresponding to the moving channel, and the handle braid is located in the opening during the moving process of the slider. In other embodiments, the opening is not provided, only a through hole for the handle ribbon to pass through is provided at the lower side of the slider part near the coil part, and the handle ribbon firstly passes through the through hole, enters the moving channel and then is connected with the slider. May be used as well.

In the above embodiments, the slider is a magnetic slider. In other embodiments, the slider may be a non-magnetic metal block, and the slider may be magnetized when the coil is charged to generate a magnetic field, and then moved by the magnetic field, and the same may be used.

In the above embodiment, the flexible pulling body in the automatic unlocking device and the backward moving device is a woven tape. In other embodiments, the flexible pulling body can be a chain, a nylon rope, etc., and the same can be used.

In the above embodiment, the mounting seat of the automatic unlocking device is installed at the bottom of the seat body and above the front-rear adjusting handle, and the mounting seat is arranged from bottom to top, from front to back in an inclined manner. In other embodiments, the mounting seat may be disposed at other positions, such as at the rear side or the front side of the seat body, and only a transition brace rod needs to be disposed at the upper side of the front and rear adjusting handle, and the handle webbing is connected with the slider by bypassing the brace rod, so that the front and rear adjusting handle can be pulled upwards in the moving process of the slider; the mounting seat can also be fixed on the pedestal in other forms, if can arrange vertically, the slider vertical upward movement can pull the state switching that the seat was realized to the front and back regulation handle equally, can also arrange horizontally, equally can.

In the above embodiment, the backward moving device includes a fixing seat, the fixing seat is a rectangular cylinder structure, a moving block is arranged in an inner cavity of the rectangular cylinder, the moving block is connected with the seat body through a backward moving braid, the backward moving device further includes a backward moving driving device, the backward moving driving device is a gas generator, a gas outlet of the gas generator is communicated with the inner cavity of the rectangular cylinder, and after the gas generator is ignited, the high-pressure gas pushes the moving block to move backward, so as to pull the seat body to move backward. In other embodiments, the backward moving device may also be of other structures, for example, a strong magnet is disposed at the rear of the seat body, an electromagnetic device is disposed at the rear side of the seat body, when the seat body needs to be moved backward, the electromagnetic device can be powered on, the electromagnetic device generates a strong magnetic field, and the strong magnet moves backward under the action of the strong magnetic field, thereby driving the seat body to move backward; the backward movement driving device can be of other types, such as a powerful electromagnet, the moving block is arranged to be a magnetic metal block, the electromagnet is arranged at the rear side of the magnetic metal block, when the seat body needs to move backward, the electromagnet is electrified to generate a magnetic field, and the magnetic field controls the magnetic metal block to move backward so as to drive the seat body to move backward.

In the above embodiments, the positioning block is disposed on the bottom plate of the main structure. In other embodiments, the limiting block can also be arranged on the cover plate, or on both the cover plate and the bottom plate, and the same can be used.

In the above embodiment, the two sides of the motion block are provided with the convex ribs, and the outer surfaces of the convex ribs are arc-shaped. In other embodiments, the outer surface of the rib may have other shapes, for example, the rib may be a cuboid shape as a whole, and may also be used; the motion block also can be used without the convex ribs, and the clamping sheets directly act on the left side surface and the right side surface of the motion block.

The utility model provides a seat automatic unlocking device, this seat automatic unlocking device's structure is the same with the automatic unlocking device's in the embodiment of above-mentioned seat structure, and here is no longer repeated.

Claims

1. An automatic seat unlocking device is characterized by comprising a mounting seat and an electromagnetic driving device, wherein the mounting seat is used for being fixed on a seat, the electromagnetic driving device is arranged on the mounting seat, a movable part of the electromagnetic driving device is a sliding block, the sliding block is connected with a flexible traction body which cannot be elastically stretched, and the other end of the flexible traction body is used for being connected with a front-back adjusting handle which controls the seat to be switched between a locking state and a free state; when the electromagnetic driving device is started, the sliding block moves along the installation seat in a guiding manner under the action of a magnetic field force, and the sliding block drives the front and back adjusting handle to move through the flexible traction body so as to enable the seat to be switched to a free state.

2. The automatic unlocking device for the seat as claimed in claim 1, wherein the mounting seat has a moving channel for the slider to move, the slider is guided to move in the moving channel under the action of magnetic field force, the mounting seat is provided with an opening corresponding to the moving channel along the length extending direction of the moving channel, and the flexible traction body passes through the opening and is fixedly connected with the slider.

3. The automatic seat unlocking device according to claim 1 or 2, wherein the slider is a magnetic slider.

4. The automatic seat unlocking device according to claim 1 or 2, wherein the flexible traction body is a webbing.

5. A seat, comprising a seat body and a front and back adjusting handle for controlling the seat to switch between a locking state and a free state, and characterized by further comprising an automatic seat unlocking device fixed on the seat body, wherein the automatic seat unlocking device is the automatic seat unlocking device as claimed in any one of claims 1 to 4.

6. The chair of claim 5, wherein when the mounting seat has a moving channel, the moving channel is inclined from bottom to top and from front to back when the mounting seat is fixed to the seat body.

7. The seat as claimed in claim 5 or 6, wherein the automatic seat unlocking device is mounted on the bottom of the seat body above the fore-and-aft adjusting handle.

8. A seat as claimed in claim 5 or 6, further comprising rearward movement means for pulling the seat body rearwardly when the seat body is free by the automatic seat unlocking means, the rearward movement means being mounted in use on the vehicle body.

9. The chair according to claim 8, wherein the backward moving device comprises a fixed seat and a moving member disposed on the fixed seat, the moving member is guided to move along the fixed seat, the moving member is connected with a flexible traction body which is not elastically stretchable, the other end of the flexible traction body is fixedly connected with the seat body, the backward moving device further comprises a backward driving device for driving the moving member to move, and the backward driving device is activated to enable the moving member to move backward along the fixed seat to pull the seat body to move backward.

10. The chair as claimed in claim 9, wherein the fixing seat is a rectangular cylinder, an inner cavity of the rectangular cylinder extends in a front-rear direction to form a movement passage for the movement of the moving member, a sealing plate for sealing the inner cavity is provided at a front end of the rectangular cylinder, and a passage for the flexible traction body to pass through is provided on the sealing plate; the moving part, the inner cavity wall of the rectangular cylinder and the sealing plate form a closed cavity together; the backward movement driving device is a gas generator, a communicating opening is formed in the rectangular cylinder body corresponding to the closed cavity, and a gas outlet of the gas generator is in sealed communication with the inner cavity of the rectangular cylinder body through the communicating opening.

11. A seat as claimed in claim 10, wherein the rectangular cylinder has left and right side walls provided with retaining members fixed at one end to the side walls and at the other end projecting rearwardly and inwardly, and the rectangular cylinder has a bottom plate and/or a top plate provided with locating blocks, and the movable member is restrained by the locating blocks and the retaining members on the side walls before being acted upon by the gas generator so as to be fixed relative to the rectangular cylinder.

12. The chair as claimed in claim 11, wherein the moving member has ribs extending in the up-down direction on both left and right sides thereof, and the outer surfaces of the ribs are curved.

13. The seat of claim 10, wherein the flexible retractor is a webbing having a width in a left-right direction, and the channel in the sealing plate has a guide structure for guiding the webbing, the guide structure having a guide channel extending in a front-rear direction.

14. The chair according to claim 10, wherein the rectangular cylinder has a closure plate at a rear end thereof for closing the cavity.