CN211075625U

CN211075625U - High-low sliding rail for automobile seat

Info

Publication number: CN211075625U
Application number: CN201921409152.1U
Authority: CN
Inventors: 俞龙生; 李党生; 朱伟荣
Original assignee: Zhejiang Longsheng Auto Parts Technology Co Ltd
Current assignee: Zhejiang Longsheng Auto Parts Technology Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-07-24
Anticipated expiration: 2029-08-28

Abstract

The utility model relates to a car seat is with high low slide rail, it is a part in the car seat. The utility model is provided with a silencing spring, a shifting fork and a shifting fork groove; the steel balls are arranged between the upper sliding rail and the lower sliding rail, the upper parts of a low-side steel ball connecting line and a high-side steel ball connecting line are inclined towards the direction of the perpendicular bisector, the lower outer side of the high side of the lower sliding rail and the upper part of a steel ball side wrapping edge of the high side of the lower sliding rail are also inclined towards the direction of the perpendicular bisector, the included angle between the upper part of the lower outer side of the high side of the lower sliding rail and the perpendicular bisector is 3-6 degrees, the included angle between the upper part of the low-side steel ball connecting line and the perpendicular bisector is 5-10 degrees, and the included angle between the upper part of the steel ball. The utility model has better anti-stripping strength, better supporting force and stability and strong anti-pressure capability; the novel unlocking device has the advantages of no abnormal sound, small friction force, small operating force, light use, reliability and safety, no idle stroke during unlocking, and more convenience and reliability in process and installation.

Description

High-low sliding rail for automobile seat

Technical Field

The invention relates to a slide rail, in particular to a high-low slide rail for an automobile seat, which is a component in the automobile seat.

Background

In the high-low slide rail for the automobile seat in the prior art, the position relationship between the upper slide rail and the lower slide rail and the steel ball is shown in fig. 14, and generally, the high-low slide rail has the following defects that an included angle α 2 ' between the upper part of a connecting line a ' of the upper steel ball and the lower steel ball at the lower end and the perpendicular bisector C ' is larger than 90 degrees or equal to 90 degrees, an included angle α 1 ' between the upper part of the lower outer side of the high edge of the lower slide rail and the perpendicular bisector C ' is larger than 90 degrees or equal to 90 degrees, and the supporting force and the stability are poor, an included angle α 3 ' between the upper part of a steel ball side wrapping edge at the high edge of the lower slide rail and the perpendicular bisector C ' is larger than 90 degrees or equal to 90 degrees, the peeling strength is poor, the retainer is of a split structure, the upper slide rail and the lower slide rail are easy to be dislocated, the stroke is shortened, the sliding cannot be in place, the upper slide rail and the lower slide rail and the middle blocking points are more than 4, the upper rail and the lower rail are easy to support the sliding rail, otherwise, the two ends of the slide rail are not.

U.S. patent application No. US006059248A discloses an invention patent application of "dual slide rail sliding device for car seat", which is the positional relationship between the upper and lower slide rails and the steel balls as described in fig. 14, wherein the angle between the upper part of the connecting line of the upper and lower steel balls at the lower end and the perpendicular bisector is greater than 90 °, the slide rails are liable to generate side sway, and the supporting force and the stability are poor, and the pressure resistance is weak; the included angle between the upper part of the lower outer side of the high edge of the lower sliding rail and the perpendicular bisector is equal to 90 degrees, the lower sliding rail is easy to deform outwards when in use, and the supporting force and the stability are poor; the included angle between the upper part of the steel ball side edge covering of the high edge of the lower slide rail and the perpendicular bisector is more than 90 degrees, and the anti-stripping strength is weak in the using process.

U.S. patent application No. US007722006B2 discloses an invention of a "locking device for a vehicle seat length adjustment mechanism having two pairs of slide rails", in which two kinds of locking structures are listed, and in a closer type of locking device, despite the provision of a lock pin assembly, the following problems remain in structure: 1) no support plate is arranged, so that the process is complex during assembly, or the bending strength is greatly reduced; meanwhile, when the locking device is used, the locking spring cannot be pressed, and only the upper sliding rail can be used for limiting the upward movement, so that the locking pin can be only made into a split structure, namely the locking pin is divided into a flange and an upper locking pin body; 2) The lock pin guide plate is a flat plate, namely a piece 72, the bending resistance of the lock pin when the slide rail is stressed in the front-back direction in a locking state is mainly supported by the piece 72, and the piece 72 is only a flat plate piece, so that the strength of the piece is insufficient, the contact area of the piece 72 and the upper slide rail is small, and the connection strength of the piece and the upper slide rail is also insufficient; 3) the pressing plate is not provided with a pressing plate corner, a pre-pressing block and a pressing plate bushing, and meanwhile, a silencing spring is not arranged, so that the problems of handle movement, abnormal sound, large operating force, possibility of idle stroke and the like exist; 4) the shifting fork is not provided with a shifting fork groove, a turning tongue and a pre-hanging hook, so that the shifting fork cannot be limited during unlocking and the like; 5) the single side has two steel balls, the other side has a roller structure, and the adaptability to rail shapes is poor, namely the requirement on the size of a slide rail is high, and the process is complex; meanwhile, the sliding capability of the roller structure is poor; 6) it also has the disadvantage that the angles described in fig. 14 are all 90 °.

U.S. patent application No. US006231022B1 discloses an invention patent application of "longitudinal slide rail of motor vehicle seat with locking device" which is similar to the locking structure of US007722006B2, but has more unlocking structures, so the locking problem of US007722006B2 exists, and the same exists; namely: no silencing spring or similar device for eliminating bumping and trembling noise of the unlocking mechanism is arranged, namely, noise is generated between the unlocking handle rod 42 and the unlocking area 40 due to repeated bumping and trembling collision contact, so that the unlocking idle stroke existing in the unlocking process cannot be eliminated.

In the prior art, in order to ensure that the locking mechanism is reliably locked when the silencing spring is added, the force application direction of the silencing spring is always in force application along the locking direction, that is, in a comparison document, the unlocking handle rod 42 and the unlocking area 40 are always not in contact during locking, and a certain gap exists, so that a process of firstly eliminating the gap during unlocking, that is, an unlocking idle stroke, exists. In the unlocking process, the force of the silencing spring is only overcome before the unlocking handle rod 42 contacts the unlocking area 40, the force of the silencing spring and the force of a return spring (a main spring 46 in a comparison document) need to be overcome simultaneously after the unlocking handle rod contacts the unlocking area 40, the spring force is increased, and a force mutation process exists in the middle of the unlocking process and the unlocking process, namely, the idle stroke is caused.

Chinese patent No. 2014203795951 discloses a utility model patent of "high-low slide rail of platformized structure", and its structurally existing problem is: 1) the whole structure and the locking mode are not reasonable enough, and the small step distance cannot be realized by locking the locking claw on the side surface; 2) the high side is at the inner side of the seat, and the low side is at the outer side, so that the anti-peeling strength is weak; 3) the high side is at the inner side of the seat, the handle turning center can not be arranged on the side surface of the upper slide rail, but a windowing flanging is additionally arranged, so that the strength is poor; 4) it also has the disadvantage that the angles described in fig. 14 are all 90 °.

Chinese patent application No. 2017104810957 discloses an invention patent application of "high-low slide rail structure for car seat", which has the structural problems that: the structural design and the working principle are not reasonable enough, the sliding rail of the device is an inner unlocking structure, the roller is used in the rail shape, and the sliding capability is poor; the small step distance cannot be realized because the locking claws are locked downwards; meanwhile, the unlocking mode can be realized only through conversion.

The above patent applications are different in their object and technical problem to be solved, and therefore their technical solutions include different structures, which cannot be simply combined for the present patent application, otherwise the structural design is more unreasonable, or the upper and lower sliding rails are not smooth, or the pressure resistance is weak, or the process is more complicated, or the cost is higher, etc.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a high-low slide rail for an automobile seat, which has more reasonable position design of an upper slide rail, a lower slide rail and a steel ball and is simultaneously provided with a silencing spring and a shifting fork which are matched with each other.

The technical scheme adopted by the invention for solving the technical problems is as follows: this car seat is with high low slide rail includes last slide rail and lower slide rail that handle subassembly, holder, locking mechanism and height distribute, and upper and lower slide rail passes through holder sliding fit, its characterized in that:

the handle assembly is internally provided with a pressure plate and a silencing spring, the pressure plate comprises a prepressing block matched with the silencing spring and a pressure plate corner, the silencing spring simultaneously comprises a spring front part, a spring rear part, a spring front bending point, a spring rear bending point and a spring hole, the spring hole is positioned in the middle of the silencing spring, the spring front part, the spring front bending point and the spring rear bending point are positioned on one side of the spring hole, and the spring rear part is positioned on the other side of the spring hole;

a shifting fork is arranged in the locking mechanism, and a communicated shifting fork groove is formed in the shifting fork;

one end of the handle assembly penetrates through a spring hole of the silencing spring, a front bending point of the spring is matched with a shifting fork groove, the rear part of the spring is arranged in a corner of the pressing plate, the front bending point of the spring is always in contact with the shifting fork, the front bending point of the spring slides at a small distance with the contact point of the shifting fork groove along with the rotation of the shifting fork, and no idle stroke exists during unlocking;

the technical scheme ensures that the handle assembly cannot move and has no abnormal sound; the friction is little during the use, and operating force is little, uses lightly, and does not have idle stroke between clamp plate and the shift fork during the locking.

A high-side steel ball and a high-side lower steel ball are arranged between the high-side upper sliding rail and the high-side lower sliding rail, and a low-side steel ball and a low-side lower steel ball are arranged between the low-side upper sliding rail and the low-side lower sliding rail;

the upper portion of low limit steel ball line and high limit steel ball line is to perpendicular bisector direction slope simultaneously, and the high limit of lower slide rail is outside down and the high limit of lower slide rail's the upper portion of borduring of steel ball side also is to perpendicular bisector direction slope simultaneously, wherein: the included angle between the upper part of the lower outer side of the high side of the lower slide rail and the perpendicular bisector is 3-6 degrees, the included angle between the upper part of the connecting line of the steel balls at the low side and the perpendicular bisector is 5-10 degrees, and the included angle between the upper part of the steel ball side wrapping edge of the high side of the lower slide rail and the perpendicular bisector is 10-15 degrees.

The technical scheme ensures that the upper sliding rail and the lower sliding rail have better anti-peeling strength, better supporting force and stability and strong pressure resistance.

Preferably, the locking mechanism is further provided with a lock pin guide plate, a support plate, a pin shaft and a lock pin with a lock pin flange, the lock pin guide plate is welded on the upper sliding rail, the lock pin is inserted into the support plate, and the pin shaft penetrates through the support plate and the shifting fork simultaneously, so that the strength is better in use.

Preferably, the lock pin comprises a lock pin groove, a lock pin flange and a lock pin lower part, the lock pin groove is positioned in the middle of the lock pin, the diameters of the upper part and the lower part of the lock pin groove are the same, and the whole lock pin is of an integrated structure.

Preferably, the diameter of the lower end of the locking spring is smaller than that of the upper end of the locking spring, and the lower end of the locking spring is positioned in the locking pin groove, so that the locking spring is conveniently installed from bottom to top.

Preferably, the shifting fork is further provided with a turning tongue and a pre-hanging hook, the turning tongue is provided with an unlocking limiting surface for limiting the shifting fork during unlocking, and the service life is long; the turning tongue, the pre-hook and the shifting fork groove are all positioned on the back of the shifting fork.

Preferably, the head of the shifting fork is inserted between the lock pin flange and the support plate, and the shifting fork is connected with the support plate through the pin shaft, so that the use strength is better.

Preferably, the shifting fork and the support plate are respectively provided with a shifting fork lug and a support lug which are provided with holes, the support plate is also provided with a lock pin hole and a rivet hole, and the pin shaft penetrates through the support lug and the shifting fork lug.

Preferably, two sides of the lock pin guide plate are provided with a first flanging and a second flanging which are connected into a whole and in the same direction, and the first flanging and the second flanging are welded with the upper sliding rail through the outer side surface of the first flanging, so that the contact area is large, and the strength is good.

Preferably, the handle assembly is further provided with a pressure plate bushing, the pressure plate bushing is fixed at one end of the pressure plate and matched with the shifting fork, and friction force between the pressure plate and the shifting fork is reduced.

Preferably, the pre-pressing block is provided with a pressing block groove, the pressing block groove is matched with the rear bending point of the spring, the corner of the pressing plate is provided with a corner groove, and the notch of the corner groove faces downwards and is matched with the rear part of the spring.

Preferably, when the corner of the pressure plate is operated in the opposite direction, the corner of the pressure plate can collide with the upper plane of the lower edge of the lower slide rail, so that misoperation is prevented.

Preferably, the retainer is of an integrated structure, the two ends of the upper slide rail are respectively provided with an upper slide rail high edge stop point and an upper slide rail low edge stop point, and the two ends of the lower slide rail are respectively provided with a lower slide rail high edge stop point and a lower slide rail low edge stop point, so that the upper steel ball and the lower steel ball are better in synchronism, less in stop points and simple in process.

Compared with the prior art, the invention has the following advantages and effects: 1. the structural design is more reasonable, the position design of the upper and lower sliding rails and the steel ball is novel, the anti-peeling strength is better, the supporting force and the stability are better, and the pressure resistance is strong; 2. the silencing spring, the shifting fork and the shifting fork groove are arranged, abnormal sound is avoided during use, friction force is small, operating force is small, use is convenient, reliable and safe, idle stroke is avoided during unlocking, and the process and installation are more convenient and reliable; 3. the handle component can not move, has no abnormal sound, and is more comfortable and safe to use; 4. the installation of the locking mechanism is more convenient, no idle stroke is ensured between a shifting fork and a handle assembly in the locking mechanism, no unlocking idle stroke is ensured in the unlocking process, the friction force is small during unlocking, and the operating force is not increased; 5. the retainer is of an integrated structure, the upper sliding rail and the lower sliding rail are in sliding fit through the steel balls, the upper steel balls and the lower steel balls are good in synchronism, the number of arranged stop points is small, and the process is simple.

Drawings

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

Fig. 2 is an enlarged schematic view of the middle structure of fig. 1.

Fig. 3 is a right-side view of the locking structure of fig. 1.

Fig. 4 is a right-side view structural schematic diagram of fig. 1 when unlocked.

Fig. 5 is a schematic expanded perspective view of the structure of fig. 1.

Fig. 6 is a schematic perspective view of the rear surface of the fork of fig. 5.

FIG. 7 is a schematic view of the position structure of the shifting fork turnover tongue and the unlocking limit surface when the invention is locked.

Fig. 8 is a schematic view of the position structure of the shifting fork turnover tongue and the unlocking limit surface during unlocking.

FIG. 9 is a schematic diagram of the position of a stop point at one end of the upper and lower slide rails (containing steel balls) according to the present invention.

Fig. 10 is a perspective view illustrating a stop position at one end of the upper rail according to the present invention.

Fig. 11 is a schematic perspective view of a stop position at one end of the lower slide rail according to the present invention.

FIG. 12 is a schematic diagram of the position layout of the upper and lower slide rails and the steel balls according to the present invention.

Fig. 13 is a schematic perspective view of the handle assembly of the present invention in case of malfunction.

Fig. 14 is a schematic diagram of the position layout of the upper and lower slide rails and the steel balls in the prior art.

In the figure: upper slide 1, upper slide hole 11, upper slide lock pin hole 12, upper slide bushing 13, upper slide rivet hole 14, upper slide high edge stop 151, upper slide low edge stop 152, lower slide 2, lock window 20, lower slide high edge stop 21, lower slide low edge stop 22, lower slide hole 23, lower slide high edge lower outer side 24, lower slide high edge steel ball side wrap 25, lower slide corner 26, upper edge 27 of lower slide high edge, lower slide upper flat surface 28, handle assembly 3, pressure plate 31, pressure plate corner 311, corner groove 3111, pre-press block 312, pressure plate groove 3121, noise reduction spring 32, spring front 321, spring rear 322, spring front bending point 323, spring rear bending point 324, spring hole 325, pressure plate bushing 33, retainer 4, high edge steel ball 41, high edge steel ball 42, low edge steel ball 43, low edge steel ball 44, lock mechanism 5, lock pin guide plate 51, guide hole 511, the locking device comprises a first flanging 512, a second flanging 513, a locking pin 52, a locking pin groove 521, a locking pin flange 522, a locking pin lower portion 523, a locking spring 53, a spring lower end 531, a shifting fork 54, a shifting fork groove 541, a head 542, a tail 543, a shifting fork ear 544, a shifting fork hole 5441, a turning tongue 548, an unlocking limiting surface 5481, a pre-hanging hook 5482, a torsion spring 55, a support plate 56, a locking pin hole 561, a rivet hole 562, a support lug 563, a support hole 5631, a pin shaft 57, a rivet 6, a low-side steel ball connecting line A, a high-side steel ball connecting line B and a perpendicular bisector C.

Detailed Description

Referring to fig. 1-8, the invention comprises an upper slide rail 1, a lower slide rail 2, a handle assembly 3, a retainer 4 and a locking mechanism 5, wherein the upper and

lower slide rails

1 and 2 are in sliding fit through the retainer 4, the retainer 4 is of an integrated structure, a steel ball 41 is arranged on the retainer 4, the handle assembly 3 and the locking mechanism 5 are both connected with the upper slide rail 1, and the handle assembly 3 is matched with the locking mechanism 5.

An upper sliding rail hole 11, an upper sliding rail locking pin hole 12 and an upper sliding rail rivet hole 14 are formed in the upper sliding rail 1, and an upper sliding rail bushing 13 is installed; the lower slide rail 2 is provided with a locking window 20.

In the present embodiment, the handle assembly 3 mainly includes a handle shaft 30, a pressure plate 31, a noise reduction spring 32 and a pressure plate bushing 33, wherein the pressure plate bushing 33 is fixed at one end of the pressure plate 31; the locking mechanism 5 mainly includes a lock pin guide plate 51, a lock pin 52, a locking spring 53, a shift fork 54, a shift fork groove 541, a torsion spring 55, a bracket plate 56 and a pin 57.

The pressing plate 31 is composed of a pressing plate corner 311 and a pre-pressing block 312 which are connected into a whole, a pressing block groove 3121 is formed on the pre-pressing block 312, the pressing block groove 3121 is matched with the spring rear bending point 324, a corner groove 3111 is formed on the pressing plate corner 311, and the notch of the corner groove 3111 faces downwards.

The silencing spring 32 must be composed of a spring front part 321, a spring rear part 322, a spring front bending point 323, a spring rear bending point 324 and a spring hole 325, wherein the spring hole 325 is positioned in the middle of the silencing spring 32; the spring front 321, spring front inflection point 323, and spring back inflection point 324 are located on one side of the spring aperture 325, and the spring back 322 is located on the other side of the spring aperture 325.

The lock pin guide plate 51 is provided with a guide hole 511, two sides of the lock pin guide plate 51 are provided with a first flanging 512 and a second flanging 513 which are connected into a whole and have the same direction, and the outer side surface of the first flanging 512 is welded with the upper slide rail 1, so that the contact area is large.

The lock pin guide plate 51 is welded on the upper slide rail 1, and ensures that the guide hole 511 is vertically concentric with the lock pin hole 12 of the upper slide rail, the lock pin 52 is inserted into the lock pin hole 561 of the bracket plate 56, the locking spring 53 is sleeved on the lock pin 52 from the lower part until the spring lower end 531 of the locking spring 53 is clamped in the lock pin groove 521 of the lock pin 52, wherein the diameter of the spring lower end 531 is smaller than that of the lock pin 52 but larger than that of the lock pin groove 521.

The lock pin 52 comprises a lock pin groove 521, a lock pin flange 522 and a lock pin lower part 523, wherein the lock pin groove 521 is positioned in the middle of the lock pin 52, the lock pin flange 522 is positioned at the top, the diameters of an upper part 524 and a lower part 525 of the lock pin groove 521 are the same, and the diameter of the lock pin lower part 523 is gradually reduced, namely the lock pin lower part 523 is in a conical shape without a sharp top; the entire latch 52 is of unitary construction.

In this embodiment, the number of the lock pins 52 is three, and a plurality of the lock pins can be alternately and independently pinned, so that the reliability is good, a small step pitch can be realized, that is, the distance between two adjacent locking positions in the sliding direction of the upper and lower sliding

rails

1 and 2 can be adjusted to be less than 10mm, and the strength is good. Meanwhile, the lower portion 523 of the lock pin 52 has a taper, so that the locking spring 53 can be conveniently sleeved in the lower portion and can be matched with the locking window of the lower slide rail 2 for locking.

The locking spring 53 is a circular wound spring matching the lock pin 52, and the diameter of the lower end 531 of the spring is smaller than that of the upper end, so that the locking spring 53 can be compressed to store energy along with the upward movement of the lock pin 52.

The shifting fork 54 is provided with a shifting fork groove 541, a head 542, a tail 543 and two shifting fork lugs 544, the shifting fork groove 541 is a communicated groove, the front part of the shifting fork 54 is designed into a tooth shape to form a plurality of heads 542, the tail 543 is bent upwards, the two shifting fork lugs 544 are respectively provided with a shifting fork hole 5441, and the connecting line of the two shifting fork holes 5441 forms the rotation center of the shifting fork 54.

The shifting fork 54 is also provided with a turning tongue 548 and a pre-hanging hook 5482, and the turning tongue 548 is provided with an unlocking limiting surface 5481 for limiting the shifting fork 54 during unlocking (see fig. 8); the turning tongue 548, the pre-hanging hook 5482 and the shifting fork groove 541 are all positioned on the back of the shifting fork 54.

The bracket plate 56 is provided with a bracket ear 563 matched with the shifting fork ear 544, the bracket ear 563 is provided with a bracket hole 5631, and the bracket plate 56 is also provided with a lock pin hole 561 and a rivet hole 562.

In this embodiment, the upper rail bushing 13 is located in the upper rail hole 11, and the handle shaft 30 at one end of the handle assembly 3 passes through the spring hole 325 of the noise reduction spring 32 and then passes through the upper rail bushing 13; the front spring bending point 323 is matched with the shifting fork groove 541, the rear spring 322 is hung in the corner groove 3111 of the corner 311 of the pressure plate, the front spring bending point 323 is always in contact with the shifting fork 54, and along with the rotation of the shifting fork 54, the contact point of the front spring bending point 323 and the shifting fork groove 541 slides by a small distance, generally 3-5mm, and in the embodiment, the small distance slides by 4 mm.

One end of a torsion spring 55 is hung on the shifting fork 54, and the other end is fixed on the upper slide rail 1; the bracket plate 56 is riveted with the upper slide rail 1, the pin shaft 57 penetrates through the bracket lug 563 of the bracket plate 56 and the shifting fork lug 544 of the shifting fork 54, namely, the shifting fork 54 is connected with the bracket plate 56 through the pin shaft 57 and can rotate; the head 542 of the fork 54 is inserted between the locking pin flange 522 and the bracket plate 56, and then the entire locking pin 52 is inserted into the upper rail locking pin hole 12 and the guide hole 511, and fixed to the upper rail 1 by the rivet 6 through the upper rail rivet hole 14.

In the present embodiment, the silencing spring 32 functions as: attached to the handle assembly 3 during pre-tightening to prevent play and rattle of the handle assembly 3, and must be engaged with the fork 54.

The effect of the spring front bend point 323 is: the noise reduction spring 32 and the shift fork groove 541 are ensured to be in point contact, and the sliding friction force between the two is small.

The effect of the spring back bend point 324 is: can be matched with the briquetting groove 3121 of the pre-briquetting 312, so that the pre-briquetting can be attached to the pressure plate 31 during pre-tensioning.

The effect that the front bending point 323 of the spring is always contacted with the shifting fork 54 is as follows: and no idle stroke between the pressure plate 31 and the shifting fork 54 is ensured during locking.

The fork groove 541 functions as: must cooperate with the noise reduction spring 32, because the shifting fork groove 541 is different from the motion track of the noise reduction spring 32, the noise reduction spring 32 can only slide in the shifting fork groove 541 and can not fall out.

The platen bushing 33 functions to: when the pressing plate 31 presses the shifting fork 54, a sliding motion exists between the pressing plate and the shifting fork, and the pressing plate bushing 33 can reduce the friction force between the pressing plate 31 and the shifting fork 54 and reduce abnormal sound.

The function of the bracket plate 56 is: 1) the bending strength of the upper sliding rail 1 is increased; 2) the shifting fork 54, the torsion spring 55, the lock pin 52, the locking spring 53, the pin shaft 57 and other parts in the locking mechanism 5 can be combined in advance and then integrally mounted on the upper slide rail 1, so that the assembly is convenient, and the labor is saved; 3) as the center of rotation of the shift fork 54; 4) when the lock spring 53 is compressed, the lock spring 53 can be pressed, and the lock spring 53 can be attached from the bottom to the top.

The function of the flap 548 is: when the unlocking limiting surface 5481 touches the side surface of the upper slide rail 1, the head 542 of the shifting fork 54 cannot be lifted upwards continuously, and the head is used for limiting the shifting fork 54 during unlocking.

The pre-hook 5482 has the following functions: in order to fit and rivet the support plate 56 with the upper slide rail 1, the spring force is not overcome during riveting, one end of the torsion spring 55 is hung on the turning tongue 548 of the shifting fork 54, during assembly, the torsion spring 55 loses effect temporarily, and after assembly, one end of the torsion spring is separated from and hung on the upper slide rail 1 to play a role of the spring.

Referring to fig. 9-11, the two ends of the upper sliding rail 1 of the present invention are respectively provided with two stopping points, fig. 9 and 10 show two stopping points at one end, namely, an upper sliding rail high edge stopping point 151 and an upper sliding rail low edge stopping point 152. similarly, two stopping points are respectively provided at two end portions of the lower sliding rail 2, fig. 9 and 11 show two stopping points at one end portion, namely, a lower sliding rail high edge stopping point 21 and a lower sliding rail low edge stopping point 22. the present invention has the advantage that the stopping points at two end portions of the lower sliding rail 2 of ① can be simultaneously punched without module support, and the stopping points can be directly sealed or punched from the lower sliding rail hole 23, and the upper sliding rail 1 of ② can be sealed or punched in advance before assembly, and the sealing frequency is low, as long as two stopping points are sealed at two ends.

Referring to fig. 12, the steel ball 41 on the high side, the steel ball 42 on the low side, the steel ball 43 on the low side and the steel ball 44 on the low side are arranged between the upper and lower sliding

rails

1, 2 of the invention, and the positional relationship is as follows:

an included angle α between the upper portion of the lower outer side 24 of the high side of the lower slide rail and a perpendicular bisector C is 3-6 degrees, in the embodiment, α is 5 degrees, an included angle α between the upper portion of a connecting line A of the steel balls at the high side of the lower slide rail and the perpendicular bisector C is 5-10 degrees, in the embodiment, α is 6 degrees, in the embodiment, because the upper portion of the lower outer side 24 of the high side of the lower slide rail and the upper portion of the connecting line A of the steel balls at the low side of the lower slide rail are inclined towards the perpendicular bisector C, namely the arrangement of the angles α and α 2 enables the compression resistance of the slide rail to be strong, specifically, ① two sides are compressed and good in supporting force and stability, α high side steel ball bearing force F generates moment on a corner 26 of the lower slide rail, α inclined towards the perpendicular bisector C is small in rotating force arm and not prone to deform outwards, 634 enables the lower slide rail 2 to deform slightly when a safety belt is pulled, namely F is reversed, namely F, α 2 α 2 enables the connecting line A of the steel.

The included angle α 3 between the upper part of the steel ball side wrapping edge 25 of the lower slide rail high edge and the perpendicular bisector C is 10-15 degrees, in the embodiment, α 3 degrees is 13 degrees, because the upper part of the steel ball side wrapping edge 25 of the lower slide rail high edge inclines towards the perpendicular bisector C direction, the α 3 arrangement enables the anti-stripping capability of the slide rail to be better, namely when the slide rail is subjected to stripping force, the interference amount between the top edge 27 of the lower slide rail high edge and the upper slide rail 1 is increased when the top edge 27 of the lower slide rail high edge is outwards opened and deformed, or when the upper slide rail 1 and the lower slide rail 2 are separated, the steel ball wrapping angle α 4 on the high edge of the lower slide rail 2 is deformed, the steel ball wrapping angle is inwards stripped, and the anti-stripping strength of.

In this embodiment, the steel ball wrap angle α 4 on the high side of the lower rail 2 is 90 ° or less than 90 °, and the strength is better.

Referring to fig. 1-5, in use, noise dampening spring 32 is fitted over handle shaft 30, with spring rear portion 322 hanging in corner groove 3111 of platen corner 311, and spring front portion 321 hanging on preload block 312 with spring rear bend point 324.

When locking is to be performed, the handle shaft 30 is inserted into the upper slide rail bushing 13, the front spring bending point 323 is in contact with the shift fork groove 541, and the shift fork 54 is in contact with the pressure plate bushing 33; the front spring portion 321 is pressed downward to separate the front spring portion 321 from the platen bushing 33, and at this time, the tail portion 543 of the fork 54 is just inserted between the front spring portion 321 and the platen bushing 33, and the upper and

lower slide rails

1, 2 are locked.

When the unlocking is required, the handle shaft 30 rotates anticlockwise, the pressure plate bushing 33 presses the shifting fork 54, the tail part 543 of the shifting fork 54 is downward, the head part 542 of the shifting fork 54 is upward, the lock pin 52 is lifted upward, and the upper sliding rail 1 and the lower sliding rail 2 are unlocked.

Referring to fig. 13, when the operator carelessly malfunctions, that is, when the handle shaft 30 rotates counterclockwise, the pressing plate bushing 33 is independent of the shifting fork 54, and does not work, the pressing plate corner 311 of the pressing plate 31 is limited by the lower slide rail 2, that is: because the press plate corner 311 is arranged, when the press plate corner touches the lower slide rail upper plane 28 at the lower side of the lower slide rail 2, the press plate corner is limited by the lower slide rail upper plane 28, and the result of misoperation is prevented.

The above description is within the reach of a person skilled in the art.

All the above-mentioned components are given different names in the present specification, and all the equivalent or simple changes made according to the structure, characteristics and principle of the present invention are included in the protection scope of the present invention.

Claims

1. The utility model provides a car seat is with high low slide rail, includes handle subassembly, holder, locking mechanism and the last slide rail and the lower slide rail that height distributes, and upper and lower slide rail passes through holder sliding fit, and is provided with steel ball, steel ball under the high limit, low edge steel ball and the steel ball under the low limit simultaneously between upper and lower slide rail, its characterized in that on the high edge:

one end of the handle assembly penetrates through a spring hole of the silencing spring, a front bending point of the spring is matched with a shifting fork groove, the rear part of the spring is arranged in a corner of the pressing plate, and the front bending point of the spring is always in contact with the shifting fork;

the position relation between the upper and lower slide rails and the steel ball is as follows:

2. The high-low slide rail for the automobile seat according to claim 1, wherein: the locking mechanism is also provided with a lock pin guide plate, a support plate, a pin shaft, a locking spring and a lock pin with a lock pin flange, the lock pin guide plate is welded on the upper sliding rail, the lock pin is inserted into the support plate, and the pin shaft penetrates through the support plate and the shifting fork.

3. The high-low slide rail for the automobile seat according to claim 2, characterized in that: the lock pin comprises a lock pin groove, a lock pin flange and a lock pin lower part, the lock pin groove is positioned in the middle of the lock pin, the diameters of the upper part and the lower part of the lock pin groove are the same, and the whole lock pin is of an integrated structure.

4. The high-low slide rail for the automobile seat according to claim 2, characterized in that: the diameter of the lower end of the locking spring is smaller than that of the upper end, and the lower end of the locking spring is positioned in the lock pin groove.

5. The high-low slide rail for the automobile seat according to claim 1, wherein: the shifting fork is also provided with a turning tongue and a pre-hanging hook, and the turning tongue is provided with an unlocking limiting surface; the turning tongue, the pre-hook and the shifting fork groove are all positioned on the back of the shifting fork; the head of the shifting fork is positioned between the lock pin flange and the support plate, and the shifting fork is connected with the support plate through a pin shaft.

6. The high-low slide rail for the automobile seat according to claim 2, characterized in that: the shifting fork and the support plate are respectively provided with a shifting fork lug and a support lug which are provided with holes, the support plate is also provided with a lock pin hole and a rivet hole, and the pin shaft penetrates through the support lug and the shifting fork lug.

7. The high-low slide rail for the automobile seat according to claim 2, characterized in that: two sides of the lock pin guide plate are provided with a first flanging and a second flanging which are connected into a whole and in the same direction, and the first flanging and the second flanging are welded with the upper sliding rail through the outer side surface of the first flanging.

8. The high-low slide rail for the automobile seat according to claim 1, wherein: the handle assembly is also provided with a pressure plate bushing which is fixed at one end of the pressure plate and is matched with the shifting fork.

9. The high-low slide rail for the automobile seat according to claim 1, wherein: the pre-pressing block is provided with a pressing block groove which is matched with the rear bending point of the spring, the corner of the pressing plate is provided with a corner groove, and the notch of the corner groove faces downwards and is matched with the rear part of the spring.

10. The high-low slide rail for the automobile seat according to claim 1, wherein: the retainer is of an integrated structure, an upper slide rail high-edge stop point and an upper slide rail low-edge stop point are respectively arranged at two ends of the upper slide rail, and a lower slide rail high-edge stop point and a lower slide rail low-edge stop point are respectively arranged at two ends of the lower slide rail.