CN113431938B

CN113431938B - Seat height control valve and car seat

Info

Publication number: CN113431938B
Application number: CN202110720034.8A
Authority: CN
Inventors: 孙国; 张晓锋
Original assignee: Hebei Goldrare Automobile Parts Co ltd
Current assignee: Hebei Goldrare Automobile Parts Co ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2022-09-13
Anticipated expiration: 2040-09-08
Also published as: CN112096947A; CN113431938A; CN112096947B

Abstract

The invention relates to a seat height control valve and an automobile seat, wherein the seat height control valve comprises a valve body and a valve rod, a valve chamber is arranged in the valve body, the valve rod can axially reciprocate in the valve chamber, three sealing rings are arranged on the inner wall of the valve chamber, a first airflow cavity and a second airflow cavity are separated in the valve chamber, two air passage interfaces are arranged on the valve body and are respectively communicated with the first airflow cavity and the second airflow cavity, a groove is arranged on the outer wall of the valve rod, the valve rod moves to different positions in the valve chamber, and the grooves are respectively communicated with the first airflow cavity, the second airflow cavity and the outside. According to the technical scheme provided by the invention, the seat can be quickly lowered to the lowest height from the height in use, a driver can conveniently get on or off the vehicle, and when the vehicle needs to run again, the seat can be quickly restored to the original height position memorized from the lowest height state.

Description

Seat height control valve and car seat

Technical Field

The invention belongs to the technical field of automobile seats, and particularly relates to a seat height control valve and an automobile seat.

Background

In order to improve the riding comfort of a driver's seat in a vehicle, a pneumatic type seat height adjusting device is generally provided, which can adjust the height of the seat according to the driver's demand and also play a role of shock absorption during driving, and when encountering a bumpy road surface, the device is inflated or exhausted adaptively to maintain the predetermined height of the seat.

The seat height adjusting apparatus in the related art generally includes an air bag, a hinge lever, a driving mechanism, an on-off valve, and the like. The air bag is a supporting device of the seat, an inflation body of the air bag is derived from an inflator pump or an air storage tank in an automobile, high-pressure gas in the air bag can enter the air bag through a switch valve, a driving mechanism drives the switch valve to be switched on and off, and the air bag is inflated or exhausted, so that the height of the seat is adjusted.

The height adjusting process of the seat is divided into a manual adjusting process and an automatic adjusting process, when a driver initially sits on the seat, the air bag needs to be manually controlled to be inflated, and when the seat is lifted to an ideal height, the inflation is stopped. During the running of the vehicle, the driving mechanism automatically controls the air bag to be inflated or exhausted so as to maintain the height set during the manual height adjustment.

However, the height of the seat is difficult to change instantly by the existing seat height adjusting device, for example, when a driver needs to get off the vehicle, the seat is difficult to be quickly reduced to the minimum height from the height during use, when the driver needs to drive again, the seat cannot be quickly restored to the original height position from the minimum height, the seat needs to be adjusted again, and the operation process is inconvenient.

Disclosure of Invention

In order to solve all or part of the above problems, an object of the present invention is to provide a seat height control valve, which can rapidly adjust the height of a seat, achieve rapid ascending and descending, and improve the operation convenience of a seat height adjusting device.

The invention also aims to provide an automobile seat, and the seat height control valve is installed on the automobile seat.

The invention provides a seat height control valve, which comprises a valve body and a valve rod, wherein a valve chamber is arranged in the valve body, the valve rod can axially reciprocate in the valve chamber, three sealing rings are arranged on the inner wall of the valve chamber, a first airflow cavity and a second airflow cavity are partitioned in the valve chamber, two air passage interfaces are arranged on the valve body and are respectively communicated with the first airflow cavity and the second airflow cavity, a groove is arranged on the outer wall of the valve rod, the valve rod moves to different positions in the valve chamber, and the groove is respectively communicated with the first airflow cavity and the second airflow cavity, the second airflow cavity and the outside.

Optionally, the valve further comprises a valve seat, the valve body is arranged adjacent to the valve seat and is axially parallel, the valve rod comprises a first parallel rod and a second parallel rod, the first parallel rod and the second parallel rod are axially parallel and can move synchronously, the first parallel rod is inserted into the valve chamber, the upper end and the lower end of the first parallel rod are both positioned outside the valve chamber, the groove is arranged on the outer wall of the first parallel rod, the second parallel rod is arranged in the valve seat, and an elastic element is arranged in the valve seat and is elastically connected with the second parallel rod.

Optionally, the valve further comprises a pressing rod and a rotating disk, the pressing rod and the rotating disk are arranged at the upper end of the valve seat, the rotating disk is pressed at the upper end of the second parallel rod, the upper end of the elastic element pushes the second parallel rod, a limiting structure is arranged on the inner wall of the valve seat, the pressing rod is pressed to drive the rotating disk to slide in the limiting structure, and the rotating disk, the elastic element and the limiting structure are matched to maintain the second parallel rod at different depths in the valve seat, so that the first parallel rod is moved to different positions in the valve chamber.

Optionally, a plurality of first inclined planes are uniformly distributed at the bottom of the pressing rod, a plurality of first guide blocks extending radially are uniformly distributed on the side wall, a plurality of second inclined planes are uniformly distributed at the top of the rotating disc, and a plurality of second guide blocks extending radially are uniformly distributed on the side wall.

Optionally, the limiting structure includes a plurality of groups of continuous third inclined planes, fourth inclined planes and guide grooves which are uniformly distributed, a limiting groove is arranged between the third inclined planes and the fourth inclined planes, the first guide block slides in the guide groove, and the second guide block slides in the limiting groove and the guide groove in a switching manner.

Optionally, a fifth inclined plane is further disposed between the adjacent first inclined planes, the fifth inclined plane and the first inclined plane are continuously disposed in opposite directions, and the inclined lengths of the fifth inclined plane and the first inclined plane are the same, or the inclined length of the fifth inclined plane is greater than the inclined length of the first inclined plane.

Optionally, the first inclined surface has an inclined length equal to or less than an inclined length of the second inclined surface.

Optionally, the third inclined surface has an inclined length smaller than an inclined length of the fourth inclined surface.

Optionally, the first inclined plane, the second inclined plane, the third inclined plane, the fourth inclined plane and the fifth inclined plane have the same inclination angle.

Optionally, a first connecting rod is arranged in the middle of the pressing rod, a second connecting rod is arranged in the middle of the rotating disc, a central hole is arranged in the middle of the first connecting rod, the second connecting rod is inserted into the central hole, and the rotating disc and the pressing rod can rotate relatively;

the upper end of the first connecting rod is connected with the upper end of the first parallel rod through a fourth connecting rod, and the fourth connecting rod prevents the first connecting rod from moving randomly.

Optionally, a central groove is formed in the middle of the second parallel rod, the upper end of the elastic element penetrates into the central groove to push the second parallel rod, and the lower end of the elastic element abuts against the bottom of the valve seat;

the lower end of the first parallel rod is connected with the lower end of the second parallel rod through a third connecting rod, an opening is formed in one side of the valve seat, and the third connecting rod moves in the opening in a reciprocating mode.

Optionally, an end cap is provided at an upper end of the valve chamber, and the first parallel rod is inserted into the valve chamber through the end cap.

Optionally, more than two grooves are arranged on the outer wall of the first parallel rod.

Optionally, a sealing groove is formed in the inner wall of the valve chamber, and the sealing ring is mounted on the inner wall of the valve chamber, or a support ring is arranged between the adjacent sealing rings.

Optionally, the air path interface is respectively an air inlet and an air bag connector from top to bottom, the air inlet is communicated with the first air flow cavity, and the air bag connector is communicated with the second air flow cavity.

Optionally, the lateral wall of the valve seat is provided with a mounting plate, and the mounting plate is provided with a connecting structure.

Optionally, the lower end of the valve seat is provided with a mounting for supporting the elastic element, and the mounting and the valve seat are detachably combined.

Optionally, the upper end of the valve seat is provided with an inwardly protruding edge limiting the upward moving height of the pressing rod.

Optionally, a button is arranged at the upper end of the pressing rod, and the pressing rod is driven to lift by manually pressing the button; or the upper end of the pressing rod is connected with a motor, and the motor drives the pressing rod to lift.

In another aspect, the invention provides a vehicle seat comprising a seat height adjusting device and further comprising the seat height control valve described above.

According to the technical scheme, the seat height control valve provided by the invention has the following advantages:

the seat height control valve of the invention reconstructs an inflation and exhaust path for the air bag, and on the premise of not influencing the function of the original seat height adjusting device, the air bag is quickly inflated and exhausted, so that the height of the seat in use can be quickly reduced to the lowest height, a driver can conveniently get on or off the vehicle, and when the driver needs to drive again, the seat can be quickly restored to the original height position memorized from the lowest height.

The seat height control valve integrates all parts into a module, and is convenient to install and high in assembly efficiency.

The seat height control valve has the advantages of reasonable structural design, quick and quick start and high operation reliability.

Drawings

FIG. 1 is a front view of a seat height control valve in an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a perspective view of a seat height control valve in an embodiment of the present invention;

FIG. 4 is a perspective view of a button of the seat height control valve in an embodiment of the present invention;

FIG. 5 is a perspective view of a press lever of the seat height control valve in the embodiment of the present invention;

FIG. 6 is a perspective view of the rotary disk of the seat height control valve in an embodiment of the present invention;

FIG. 7 is a perspective view of a valve stem of a seat height control valve in an embodiment of the present invention;

FIG. 8 is a front view of a valve stem of a seat height control valve in an embodiment of the present invention;

FIG. 9 is a perspective view of a valve body and valve seat of a seat height control valve in an embodiment of the present invention;

FIG. 10 is a cross-sectional view of a valve body and valve seat of a seat height control valve in an embodiment of the present invention.

Description of reference numerals: 1. a pressing lever; 1-1, a first connecting rod; 1-2, a first guide block; 1-3, a first inclined plane; 1-4, a central hole; 1-5, a fifth bevel; 2. rotating the disc; 2-1, a second connecting rod; 2-2, a second guide block; 2-3, a second inclined plane; 3. a valve seat; 3-1, mounting a plate; 3-2, a guide groove; 3-3, a third inclined plane; 3-4, a fourth bevel; 3-5, gap; 3-6, clamping holes; 4. a valve stem; 4-1, a groove; 4-2, a central groove; 4-3, a first parallel bar; 4-4, a third connecting rod; 4-5, a second parallel rod; 5. a spring; 6. an end cap; 7. a valve body; 7-1, an air inlet; 7-2 and an air bag connecting port; 8. a bottom support; 9. a first seal ring; 10. a second seal ring; 11. a third seal ring; 12. a fourth connecting rod; 12-1, a body; 12-2, clamping jaws; 12-3, trepanning.

Detailed Description

For a better understanding of the objects, structure and function of the invention, a seat height control valve and a vehicle seat of the present invention will be described in further detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1, 2, and 3, an embodiment 1 of the present invention discloses a seat height control valve, which includes a valve body 7 and a valve rod 4, wherein a valve chamber is disposed in the valve body 7, the valve rod 4 is axially and reciprocally movable in the valve chamber, three seal rings are disposed on an inner wall of the valve chamber, a first airflow chamber and a second airflow chamber are partitioned in the valve chamber, two air passage ports are disposed on the valve body 7 and respectively communicated with the first airflow chamber and the second airflow chamber, a groove 4-1 is disposed on an outer wall of the valve rod 4, the valve rod 4 moves to different positions in the valve chamber, and the groove 4-1 is respectively communicated with the first airflow chamber and the second airflow chamber, and the outside.

When the groove 4-1 is communicated with the first airflow cavity and the second airflow cavity, the air bag can be rapidly inflated, when the groove 4-1 is communicated with the second airflow cavity and the outside, the air bag can be rapidly exhausted, and the outside can be atmosphere or a recycling air storage tank. The seat height control valve in this embodiment reconstructs an inflation and deflation path for the air bag, enabling rapid raising and lowering of the vehicle seat, and the reciprocating movement of the valve stem 4 may be driven manually, e.g. by manual depression, or in an automatic drive mode, e.g. by an electric motor.

As shown in fig. 2 and 3, the seat height control valve further includes a valve seat 3, and the valve body 7 is disposed adjacent to and axially parallel to the valve seat 3, so that the overall length of the seat height control valve can be reduced, and the seat height control valve is suitable for being installed in a small space. The valve body 7 and the valve seat 3 may be integrally formed or separately formed together, preferably integrally formed, and the valve body 7 and the valve seat 3 share a section of side wall.

Accordingly, the valve rod 4 includes a first parallel rod 4-3 and a second parallel rod 4-5, the first parallel rod 4-3 and the second parallel rod 4-5 are axially parallel and synchronously movable, the first parallel rod 4-3 is inserted into the valve chamber and both of the upper end and the lower end thereof are located outside the valve chamber, the groove 4-1 is provided on the outer wall of the first parallel rod 4-3, the second parallel rod 4-5 is provided in the valve seat 3, and the elastic member is provided in the valve seat 3 to elastically connect with the second parallel rod 4-5. The elastic element can be a spring, a silica gel column, or other suitable elastic elements, and a cylindrical spring 5 is preferably used.

In a preferred embodiment, the length of the valve body 7 is smaller than that of the valve seat 3, and the valve body 7 is connected with the upper part of the valve seat 3 with the top ends of the valve body and the valve seat being flush. The length of the first parallel rod 4-3 is larger than that of the valve body 7, and a part of the rod body of the first parallel rod 4-3 is always positioned in the valve chamber during the reciprocating movement of the first parallel rod 4-3. The length of the first parallel rod 4-3 is larger than that of the second parallel rod 4-5, and the lower end of the first parallel rod 4-3 is connected with the lower end of the second parallel rod 4-5 through a third connecting rod 4-4.

As shown in fig. 2, the three sealing rings are respectively a first sealing ring 9, a second sealing ring 10 and a third sealing ring 11, because the valve chamber inner wall, the first parallel rod 4-3 and the three sealing rings are in tight fit relation, on the premise that the groove 4-1 does not participate in communication, the first airflow cavity and the second airflow cavity, the second airflow cavity and the outside are isolated, when the groove 4-1 crosses the second sealing ring 10, the first airflow cavity and the second airflow cavity are communicated through the groove 4-1, the second airflow cavity and the outside are still in a blocking state, when the groove 4-1 crosses the third seal ring 11, the lower end of the groove 4-1 has now protruded from the lower end of the valve chamber, and the groove 4-1 extends out by a proper length, the second airflow cavity is communicated with the outside through the groove 4-1, and the first airflow cavity and the second airflow cavity are restored to the isolated state.

The sealing ring is made of rubber, and the section of the sealing ring can be in a circular shape, a rectangular shape or a groove shape and the like. At least the second sealing ring 10 and the third sealing ring 11 need to have a section diameter (or a section height) smaller than the length of the groove 4-1, and do not affect the communication of the groove 4-1 with the separated chambers. The length of the groove 4-1 needs to be at least smaller than the height of the second airflow chamber, so that the first airflow chamber, the second airflow chamber and the outside are prevented from being communicated simultaneously.

As shown in FIG. 3, the air path interface comprises an air inlet 7-1 and an air bag connector 7-2 from top to bottom, the air inlet 7-1 is communicated with the first air flow cavity, and the air bag connector 7-2 is communicated with the second air flow cavity. The air inlet 7-1 is externally connected with an inflator pump or an air storage tank arranged in an automobile, the air bag connecting port 7-2 is externally connected with an air bag below an automobile seat, when the first airflow cavity and the second airflow cavity are communicated through the groove 4-1, the air inlet 7-1 is communicated with the air bag connecting port 7-2, and the inflator pump or the air storage tank can inflate the air bag, so that the automobile seat is quickly lifted and is restored to the preset highest height; when the second airflow cavity is communicated with the outside through the groove 4-1, the air bag connecting port 7-2 is communicated with the outside, at the moment, the air bag cannot be inflated by the inflator pump or the air storage tank, the air bag is under the action of the pressure of the automobile seat, and the air in the air bag can be rapidly discharged to the atmosphere through the air outlet 7-3 or the air storage tank is recycled, so that the automobile seat is rapidly lowered to the preset minimum height.

In the embodiment, the seat height control valve further comprises a pressing rod 1 and a rotating disk 2, the pressing rod 1 and the rotating disk 2 are arranged at the upper end of the valve seat 3, the rotating disk 2 is pressed at the upper end of the second parallel rod 4-5, the upper end of the spring 5 pushes the second parallel rod 4-5, a limiting structure is arranged on the inner wall of the valve seat 3, the pressing rod 1 is pressed to drive the rotating disk 2 to slide in the limiting structure, the rotating disk 2, the spring 5 and the limiting structure are matched to keep the second parallel rod 4-5 at different depths in the valve seat 3, and therefore the first parallel rod 4-3 is moved to different positions in the valve chamber.

The upper end of the pressing rod 1 can be provided with a button to meet the requirement of manual pressing, and can also be connected with a motor to meet the requirement of automatic driving. The valve seat 3 not only plays a role in assembling a plurality of components including the pressing rod 1, the rotating disk 2, the second parallel rods 4-5 and the spring 5, but also can provide an installation structure for the seat height control valve, so that the seat height control valve is installed and fixed in an automobile.

As shown in fig. 5 and 6, a plurality of first inclined planes 1-3 are uniformly distributed at the bottom of the pressing rod 1, a plurality of first guide blocks 1-2 which radially extend are uniformly distributed on the side wall, a plurality of second inclined planes 2-4 are uniformly distributed at the top of the rotating disc 2, a plurality of second guide blocks 2-3 which radially extend are uniformly distributed on the side wall, and when the pressing rod 1 is pressed, the first inclined planes 1-3 drive the second inclined planes 2-4 to move and drive the rotating disc 2 to slide in the limiting structure under the elastic force of the spring 5.

The first inclined plane 1-3 and the second inclined plane 2-4 have the same inclination angle, so that the driving of the facing surface can be realized, the lengths of the first inclined plane and the second inclined plane can be the same, or the inclination length of the first inclined plane 1-3 is smaller than that of the second inclined plane 2-4, and the phenomenon that the top end of the second inclined plane 2-4 of the rotating disc 2 is contacted with the lower end of the first inclined plane 1-3 of the pressing rod 1 to cause blockage in the rotating process is avoided. The radial extension lengths of the first guide block 1-2 and the second guide block 2-3 are the same.

In order to optimize the structure, inclined planes are also arranged between the adjacent first inclined planes 1-3, namely fifth inclined planes 1-5 shown in fig. 5, the fifth inclined planes 1-5 can adopt opposite continuous design with the first inclined planes 1-3, the inclination directions are different, and the inclination lengths of the fifth inclined planes 1-5 and the first inclined planes 1-3 are the same or the inclination length of the fifth inclined planes 1-5 is larger than that of the first inclined planes 1-3. The fifth inclined plane 1-5 is arranged to facilitate the second guide block 2-3 to slide out from the rear of the first inclined plane 1-3, and rotation of the rotating disc 2 is facilitated. In addition, the fifth inclined plane 1-5 is arranged, so that the phenomenon that the top end of the second inclined plane 2-4 of the rotating disc 2 is contacted with the lower end of the first inclined plane 1-3 of the pressing rod 1 in the rotating process to cause blocking can be avoided, and the second inclined plane 2-4 is smoothly attached to the first inclined plane 1-3 again in the inflating process of the air bag, so that the first guide block 1-2 and the second guide block 2-3 slide in the guide groove 3-3 again.

As a preferred embodiment, eight first inclined planes 1-3 are uniformly distributed at the bottom of the pressing rod 1, four first guide blocks 1-2 which radially extend are uniformly distributed on the side wall, wherein four first inclined planes 1-3 are respectively arranged corresponding to the four first guide blocks 1-2 and extend to the lower ends of the first guide blocks 1-2, and the other four first inclined planes 1-3 are respectively arranged at positions between the first guide blocks 1-2; in addition, eight fifth inclined planes 1-5 are uniformly distributed at the bottom of the pressing rod 1, the fifth inclined planes 1-5 and the first inclined planes 1-3 are symmetrically and continuously designed, and the fifth inclined planes 1-5 and the first inclined planes 1-3 have the same inclination length, the same inclination angle and the axisymmetric inclination direction; four second inclined planes 2-4 are uniformly distributed at the top of the rotating disc 2, four second guide blocks 2-3 which radially extend are uniformly distributed on the side wall, and the second inclined planes 2-4 are respectively arranged at the upper ends of the second guide blocks 2-3. The top edge of the second inclined plane 2-4 can be processed into a fillet, which is beneficial to the matching of the second inclined plane 2-4 and the limiting structure.

As shown in fig. 10, the limiting structure comprises a plurality of groups of continuous third inclined planes 3-3, fourth inclined planes 3-4 and guide grooves 3-2 which are uniformly distributed, a limiting groove is arranged between the third inclined planes 3-3 and the fourth inclined planes 3-4, the first guide block 1-2 slides in the guide groove 3-2, and the second guide block 2-3 slides between the limiting groove and the guide groove 3-2 in a switching manner.

The downward inclination length of the third inclined plane 3-3 is less than the downward inclination length of the fourth inclined plane 3-4, and the rotation angle of the rotating disk 2 when the second guide block 2-3 enters the limiting groove from the guide groove 3-2 through the fourth inclined plane 3-4 is greater than the rotation angle of the rotating disk 2 when the second guide block 2-3 is separated from the limiting groove and enters the guide groove 3-2 through the third inclined plane 3-3. For example, when the second guide block 2-3 enters the limiting groove from the guide groove 3-2 through the fourth inclined surface 3-4, the air bag is in a deflation state; when the second guide block 2-4 is separated from the limit groove and enters the guide groove 3-2 through the third inclined surface 3-3, the air bag is in an inflation state, and the downward movement distance of the pressing rod 1 is shorter when the air bag is started to inflate than that when the air bag is started to exhaust, so that the air bag is restored to the original memory height through a shorter pressing stroke of a passenger, the pressing pressure degree of the passenger is reduced, and the user experience is improved. In addition, the downward inclination length of the third inclined surface 3-3 is smaller than that of the fourth inclined surface 3-4, so that the pressing rod 1 is ensured to drive the rotating disc 2 to normally rotate, and the phenomenon of jamming is avoided.

The third inclined plane 3-3 and the fourth inclined plane 3-4 can be formed by a convex block on the inner wall of the valve seat 3, and the lower end edges of the third inclined plane 3-3 and the fourth inclined plane 3-4 can be processed by a fillet, so that the second guide block 2-3 can conveniently pass through the fillet.

In a preferred embodiment, the limiting structure comprises four sets of consecutive third inclined surfaces 3-3, fourth inclined surfaces 3-4 and guide grooves 3-2 which are uniformly distributed, the guide grooves 3-2 extend axially, the first guide blocks 1-2 slide in the guide grooves 3-2 all the time, when the rotary disk 2 is pressed downwards by the pressing rod 1, the first inclined surfaces 1-3 press the second inclined surfaces 2-4, in addition to the downward pressure, a circumferential rotating force is generated, when the second guide blocks 2-3 pass the lower ends of the fourth inclined surfaces 3-4, the second guide blocks 2-3 slide upwards along the fourth inclined surfaces 3-4 to enter the lower parts of the limiting grooves, at the moment, the pressing force of the pressing rod 1 disappears, and the second guide blocks 2-3 enter the limiting grooves under the elastic force of the reset elements, when the groove 4-1 of the valve rod 4 crosses the third sealing ring 11, the second airflow cavity is communicated with the outside through the groove 4-1 to realize quick exhaust. When the rotary disc 2 is pressed downwards again by the pressing rod 1, the first inclined plane 1-3 extrudes the second inclined plane 2-4, the second guide block 2-3 can slide downwards along the side wall of the limiting groove, when the second guide block 2-3 crosses the lower end of the third inclined plane 3-3, the second guide block 2-3 can slide upwards along the third inclined plane 3-3 to enter the lower part of the guide groove 3-2, at the moment, the pressing force of the pressing rod 1 disappears, the second guide block 2-3 enters the guide groove 3-2 under the elastic force of reset, the rotary disc 2 ascends, and when the groove 4-1 of the valve rod 4 crosses the second sealing ring 10, the first airflow cavity and the second airflow cavity are communicated through the groove 4-1 to realize quick inflation.

When the pressing rod 1 presses the rotating disc 2 downwards for the third time, the first inclined surface 1-3 presses the second inclined surface 2-4, and the first guide block 1-2 and the second guide block 2-3 move downwards at the same time and are driven by circumferential rotating force; when the second guide block 2-3 reaches the lower end of the fourth inclined surface 3-4, the second guide block can slide upwards along the fourth inclined surface 3-4 and can enter the limiting groove again, and rapid exhaust is realized. When the seat height control valve is actually used, the second guide block 2-3 may be first located in the limiting groove, or may be first located in the guide groove 3-2, and the switching between the limiting groove and the guide groove 3-2 is performed according to actual needs.

In the embodiment, when viewed from the top view of the seat height control valve, the rotating disc 2 slides in the limiting structure, and rotates clockwise. The rotating disc 2 may also assume a counter clockwise rotation if the direction of inclination of the second ramp 2-4, the third ramp 3-3, the fourth ramp 3-4 is changed. Since the circumferential rotational force applied to the second inclined surfaces 2-4 by the first inclined surfaces 1-3 is fixed in direction (e.g., clockwise rotation or counterclockwise rotation), the rotational direction of the rotary plate 2 in the limit structure is fixed during the cyclic pressing of the pressing lever 1 to drive the rotary plate 2 to rotate.

As shown in fig. 5 and 6, the pressing rod 1 is provided at the middle thereof with a first connecting rod 1-1, the rotating disc 2 is provided at the middle thereof with a second connecting rod 2-1, the first connecting rod 1-1 is provided at the middle thereof with a central hole 1-4, and the second connecting rod 2-1 is inserted into the central hole 1-4, allowing the rotating disc 2 to rotate relative to the pressing rod 1 and to move axially by a predetermined distance (the distance is an axial driving distance of the first inclined surface 1-3 and the second inclined surface 2-4).

The upper end of the first connecting rod 1-1 can be provided with a clamping hole or a thread, so that a button can be conveniently installed or the first connecting rod is connected with a motor.

As a preferred embodiment, the upper end of the first connecting rod 1-1 is connected with the upper end of the first parallel rod 4-3 through a fourth connecting rod 12, and the fourth connecting rod 12 prevents the first connecting rod 1-1 from moving arbitrarily.

The structure of the fourth connecting rod 12 is as shown in fig. 4, and includes a body 12-1, two ends of the body 12-1 are provided with connecting structures respectively connecting the upper end of the first connecting rod 1-1 and the upper end of the first parallel rod 4-3, the fourth connecting rod 12 may be made of a material with weak structural strength, such as silica gel, and a weak connection is formed between the upper end of the first connecting rod 1-1 and the upper end of the first parallel rod 4-3, when the rotating disc 2 is pressed downward by the pressing rod 1, the pressing rod 1 does not first drive the valve rod 4 to move downward, so as to prevent the rotating disc 2 from being effectively driven, but the fourth connecting rod 12 still prevents the pressing rod 1 from being separated from the rotating disc 2. Or the fourth connecting rod 12 may be made of a material with a stronger structural strength, such as plastic, and at this time, the structure of the fourth connecting rod 12 needs to be changed adaptively, for example, the clamping jaw 12-2 may be arranged to connect the upper end of the first parallel rod 4-3, the sleeve hole 12-3 may be arranged to connect the upper end of the first connecting rod 1-1, specifically, the sleeve hole 12-3 may be slidably connected to the outer surface of the upper end of the first connecting rod 1-1, the upper end of the first connecting rod 1-1 is provided with a diameter-variable section, the outer circumference of the diameter-variable section is smaller than the inner circumference of the sleeve hole 12-3, and the step below the diameter-variable section may hold the fourth connecting rod 12 upward. When the rotating disc 2 is pressed downwards by the pressing rod 1, the diameter-variable section of the first connecting rod 1-1 slides in the sleeve hole 12-3, the rotating disc 2 drives the second parallel rod 4-5 to move downwards in the rotating process, so that the valve rod 4 integrally moves downwards, and the first parallel rod 4-3 drives the sleeve hole 12-3 of the fourth connecting rod 12 to slide on the outer surface of the diameter-variable section of the first connecting rod 1-1. It can be seen that when the pressing rod 1 presses the rotating disk 2 downwards, the valve rod 4 is not first driven to move downwards, so that the rotating disk 2 cannot be effectively driven. When the fourth connecting rod 12 adopts any one of the above structures, if the rotating disk 2 is limited, the valve rod 4 and the fourth connecting rod 12 are also limited, and are blocked by the fourth connecting rod 12, the pressing rod 1 cannot move freely, and the pressing rod 1 can be prevented from moving upwards and moving freely and the rotating disk 2 is prevented from having too large distance.

As shown in fig. 2, 7 and 8, a central groove 4-2 is formed in the middle of the second parallel rod 4-5, a spring 5 can be used as an elastic element in the valve seat 3, the upper end of the spring 5 extends into the central groove 4-2 to push the second parallel rod 4-5, and the lower end of the spring 5 abuts against the bottom of the valve seat 3. The bottom of the valve seat 3 can be provided with a spring seat fixing spring 5, and the spring seat can adopt the structural characteristics of a bulge or a groove.

In order to reduce the weight, the first parallel bar 4-3 can be provided as a hollow structure, and the depth of the groove 4-1 must be smaller than the wall thickness of the first parallel bar 4-3 to avoid penetrating the side wall of the first parallel bar 4-3. The first parallel bar 4-3 may be provided with a solid structure at the position where the groove 4-1 is provided, as shown in fig. 8, and then the depth of the groove 4-1 may be appropriately deepened.

As shown in fig. 2, the upper end of the valve chamber is provided with an end cap 6, and the first parallel rod 4-3 is inserted into the valve chamber through the end cap 6. The end cap 6 provides dust and a certain sealing function for the valve chamber and also provides a guide function for the first parallel rod 4-3. The lower end of the valve chamber may be provided with an inwardly projecting rim which also serves the same function as the end cap 6.

As a preferred embodiment, more than two grooves 4-1 are arranged on the outer wall of the first parallel rod 4-3 to ensure that the isolation chambers can be reliably communicated, and the heights of the more than two grooves 4-1 on the outer wall of the first parallel rod 4-3 are the same.

In order to fix the sealing ring, the sealing ring is arranged on the inner wall of the valve chamber and is arranged in the sealing groove, and the sealing ring can be kept at a preset position and cannot move along with the first parallel rod 4-3. Or, set up the lock ring between the adjacent sealing washer, realize keeping the sealing washer in preset position, can not follow valve rod 4 and remove, the thickness of lock ring needs to be less than the cross-sectional diameter (or the cross-sectional height) of sealing washer, promptly, the internal diameter of lock ring is greater than the internal diameter of sealing washer, makes things convenient for valve rod 4 to reciprocate, and the inner wall of lock ring does not contact the face of cylinder of valve rod 4. In addition, a step needs to be arranged on the inner wall of the valve chamber below the third sealing ring 11, as shown in fig. 2, the step can prevent the third sealing ring 11 from moving downwards, the end cover 6 at the upper end of the valve chamber can prevent the first sealing ring 9 from moving upwards, and the two support rings can keep the three sealing rings at preset positions and cannot move along with the valve rod 4 under the action of upper and lower limit functions of the end cover 6 and the step.

As shown in fig. 9, two air passage ports radially extend from the side wall of the valve body 7, and the two air passage ports are in a pagoda shape and are not easily separated from the pipeline when the pipeline is connected. The air inlet 7-1 is connected with an inflator pump or an air storage tank of the automobile through a pipeline, and the air bag connecting port 7-2 is connected with an air bag through a pipeline.

The upper end of the valve seat 3 is provided with an edge protruding inwards to limit the upward moving height of the pressing rod 1, the pressing rod 1 cannot be separated from the valve seat 3 when moving to the edge, at the moment, the spring 5 still has elastic force on the second parallel rod 4-5, the rotating disc 2 and the pressing rod 1, and the three components cannot shake.

The side wall of the valve seat 3 is provided with a mounting plate 3-1, the mounting plate 3-1 is provided with a connecting structure, such as a mounting hole, and the seat height control valve can be mounted and fixed in an automobile through the mounting plate 3-1. Reinforcing ribs can also be provided between the mounting plate 3-1 and the side walls of the valve seat 3 to enhance structural strength.

The lower end of the valve seat 3 is provided with a bottom support 8 supporting spring 5, the bottom support 8 and the valve seat 3 can be detachably combined, for example, clamping and threaded connection are adopted, and the pressing rod 1, the rotating disk 2, the second parallel rods 4-5 and the spring 5 are convenient to assemble. The pressing rod 1, the rotating disk 2, the second parallel rods 4-5 and the spring 5 can be installed into the valve seat 3 from the lower end opening of the valve seat 3, and then the bottom support 8 is combined, so that the assembly of the seat height control valve is realized.

One side of the valve seat 3 is provided with an opening 3-5, the third connecting rod 4-4 reciprocates in the opening 3-5, and the length of the opening 3-5 limits the moving stroke of the valve rod 4. When the valve rod 4 moves downwards, the third connecting rod 4-4 is blocked by the bottom support 8 when moving to the position of the bottom support 8, and reaches the lowest position. When the valve rod 4 moves upwards, the third connecting rod 4-4 is blocked by the side wall between the valve body 7 and the valve seat 3 when moving to the lower end of the valve body 7, and reaches the highest position.

The seat height control valve in the embodiment reconstructs an inflation and exhaust path for the air bag, the air bag is rapidly inflated and exhausted on the premise of not influencing the function of the original seat height adjusting device, the height of the seat in use can be rapidly reduced to the lowest height, a driver can conveniently get on or off the vehicle, and when the vehicle needs to run again, the seat can be rapidly restored to the original memory height position from the lowest height.

The seat height control valve in the embodiment integrates all parts into a module, and is convenient to install and high in assembly efficiency.

The seat height control valve in the embodiment has the advantages of reasonable structural design, quick and quick start and high running reliability.

Example 2

The embodiment discloses an automobile seat, which comprises a seat height adjusting device and a seat height control valve in the embodiment 1.

The seat height adjusting device comprises components such as an air bag, a hinged rod piece, a driving mechanism, an on-off valve and the like, and the specific structure and the connection relation between the seat height adjusting device and the automobile seat can refer to the prior art.

The seat height control valve may be installed inside the car seat cover, for example, on the inner wall of the car seat cover through the installation plate 3-1, and then the piping for connecting the inflator or the air tank and the piping for connecting the air bag are appropriately arranged. The control button can be arranged on the seat cover shell, so that the driver can conveniently control the seat cover shell.

The automobile seat behind the seat height control valve can realize rapid speed-up and speed-down, and particularly, when a driver needs to get off the automobile, the height of the seat is rapidly lowered to the minimum height from the using height, when the driver needs to go again, the seat is rapidly restored to the original memory height position from the minimum height, and the control process is very convenient.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and encompass, for example, both fixed and removable connections; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

The invention discloses A1 and a seat height control valve, which comprises a valve body and a valve rod, wherein a valve chamber is arranged in the valve body, the valve rod can axially reciprocate in the valve chamber, three sealing rings are arranged on the inner wall of the valve chamber, a first airflow cavity and a second airflow cavity are separated in the valve chamber, two air passage interfaces are arranged on the valve body and are respectively communicated with the first airflow cavity and the second airflow cavity, a groove is arranged on the outer wall of the valve rod, the valve rod moves to different positions in the valve chamber, and the groove is respectively communicated with the first airflow cavity, the second airflow cavity, the outside.

A2, the seat height control valve according to a1, further comprising a valve seat, the valve body being disposed adjacent to and axially parallel to the valve seat, the valve stem comprising a first parallel rod and a second parallel rod, the first and second parallel rods being axially parallel and synchronously movable, the first parallel rod being inserted into the valve chamber and having both upper and lower ends located outside the valve chamber, the groove being provided on an outer wall of the first parallel rod, the second parallel rod being disposed in the valve seat, an elastic member being provided in the valve seat to elastically connect with the second parallel rod.

The seat height control valve A3 as defined in A2, further comprising a pressing rod and a rotating disk, wherein the pressing rod and the rotating disk are arranged at the upper end of the valve seat, the rotating disk is pressed at the upper end of the second parallel rod, the upper end of the elastic element pushes the second parallel rod, a limiting structure is arranged on the inner wall of the valve seat, the pressing rod is pressed to drive the rotating disk to slide in the limiting structure, and the rotating disk, the elastic element and the limiting structure are matched to keep the second parallel rod at different depths in the valve seat, so that the first parallel rod is moved to different positions in the valve chamber.

A4, the seat height control valve of A3, the bottom evenly distributed of according to the depression bar has a plurality of first inclined planes, evenly distributed has a plurality of first guide blocks that radially stretch out on the lateral wall, evenly distributed has a plurality of second inclined planes at the top of rotary disk, evenly distributed has a plurality of second guide blocks that radially stretch out on the lateral wall, when pressing according to the depression bar, first inclined plane drive the second inclined plane removes and under the spring action of elastic element drive the rotary disk slide in limit structure.

A5, seat height control valve as in A4, limit structure includes a plurality of continuous third inclined plane of group, fourth inclined plane and the guide way of evenly distributed setting, be provided with the spacing groove between third inclined plane and the fourth inclined plane, first guide block slide in the guide way, the second guide block be in the spacing groove with switch between the guide way slides.

A6, the seat height control valve according to A5, wherein a fifth inclined plane is further arranged between the adjacent first inclined planes, the fifth inclined plane and the first inclined plane are oppositely and continuously arranged, the inclined length of the fifth inclined plane is the same as that of the first inclined plane, or the inclined length of the fifth inclined plane is greater than that of the first inclined plane.

A7, the seat height control valve of A4, the inclined length of the first inclined plane is equal to or less than the inclined length of the second inclined plane.

A8, the seat height control valve of A5, the third ramp having a shorter slope length than the fourth ramp.

A9, the seat height control valve of A6, the first, second, third, fourth and fifth ramps being inclined at the same angle.

A10, the seat height control valve according to A3, wherein a first connecting rod is provided at the center of the pressing rod, a second connecting rod is provided at the center of the rotating disc, a center hole is provided at the center of the first connecting rod, the second connecting rod is inserted into the center hole, and the rotating disc and the pressing rod are rotatable relative to each other;

A11, the seat height control valve according to A2, wherein a central groove is arranged in the middle of the second parallel rod, the upper end of the elastic element penetrates into the central groove to push the second parallel rod, and the lower end of the elastic element is pressed against the bottom of the valve seat;

A12, the seat height control valve of a2, wherein an end cap is provided at an upper end of the valve chamber, and the first parallel rod is inserted into the valve chamber through the end cap.

A13, the seat height control valve of A2, wherein more than two grooves are arranged on the outer wall of the first parallel rod.

A14, the seat height control valve according to A1, wherein the inner wall of the valve chamber is provided with a sealing groove for installing the sealing ring, or a supporting ring is arranged between the adjacent sealing rings.

A15, the seat height control valve of A1, the air path interface is an air inlet and an air bag connecting port from top to bottom, the air inlet is communicated with the first air flow cavity, and the air bag connecting port is communicated with the second air flow cavity.

A16, the seat height control valve of A2, the side wall of the valve seat is provided with a mounting plate, and the mounting plate is provided with a connecting structure.

A17, the seat height control valve according to A2, wherein the lower end of the valve seat is provided with a shoe supporting the elastic element, and the shoe is detachably combined with the valve seat.

A18, the seat height control valve of a2, wherein an upper end of the valve seat is provided with an inwardly protruding edge to limit an upward moving height of the pressing rod.

A19, the seat height control valve of any one of A3-A10, wherein the upper end of the pressing rod is provided with a button, and the pressing rod is driven to lift by manually pressing the button; or the upper end of the pressing rod is connected with a motor, and the motor drives the pressing rod to lift.

The invention also discloses A20, a car seat comprising a seat height adjusting device and further comprising a seat height control valve as claimed in any one of claims A1-A19.

Claims

1. A seat height control valve is characterized by comprising a valve body and a valve rod, wherein a valve chamber is arranged in the valve body, the valve rod can axially reciprocate in the valve chamber, three sealing rings are arranged on the inner wall of the valve chamber, a first airflow cavity and a second airflow cavity are partitioned in the valve chamber, two air passage interfaces are arranged on the valve body and are respectively communicated with the first airflow cavity and the second airflow cavity, a groove is arranged on the outer wall of the valve rod, the valve rod moves to different positions in the valve chamber, and the grooves are respectively communicated with the first airflow cavity and the second airflow cavity, the second airflow cavity and the outside;

the valve body is arranged adjacent to the valve seat and is axially parallel, the valve rod comprises a first parallel rod and a second parallel rod, the first parallel rod and the second parallel rod are axially parallel and can move synchronously, the first parallel rod is inserted into the valve chamber, the upper end and the lower end of the first parallel rod are both positioned outside the valve chamber, the groove is arranged on the outer wall of the first parallel rod, the second parallel rod is arranged in the valve seat, and an elastic element is arranged in the valve seat and is elastically connected with the second parallel rod;

an end cover is arranged at the upper end of the valve chamber, and the first parallel rod penetrates through the end cover to be inserted into the valve chamber.

2. The seat height control valve of claim 1, wherein more than two of the grooves are provided on an outer wall of the first parallel bar.

3. The seat height control valve of claim 1, wherein the side wall of the valve seat is provided with a mounting plate on which the attachment structure is provided.

4. The seat height control valve according to claim 1, wherein the lower end of the valve seat is provided with a shoe supporting the elastic member, the shoe being detachably combined with the valve seat.

5. The seat height control valve according to claim 1, further comprising a pressing rod and a rotating disk, wherein the pressing rod and the rotating disk are arranged at the upper end of the valve seat, the rotating disk is pressed at the upper end of the second parallel rod, the upper end of the elastic element pushes the second parallel rod, a limiting structure is arranged on the inner wall of the valve seat, the pressing rod is pressed to drive the rotating disk to slide in the limiting structure, and the rotating disk, the elastic element and the limiting structure are matched to keep the second parallel rod at different depths in the valve seat, so that the first parallel rod is moved to different positions in the valve chamber;

the bottom of the pressing rod is uniformly distributed with a plurality of first inclined planes, the side wall of the pressing rod is uniformly distributed with a plurality of first guide blocks which radially extend, the top of the rotating disc is uniformly distributed with a plurality of second inclined planes, the side wall of the rotating disc is uniformly distributed with a plurality of second guide blocks which radially extend, and when the pressing rod is pressed, the first inclined planes drive the second inclined planes to move and drive the rotating disc to slide in the limiting structure under the elastic action of the elastic element;

the limiting structure comprises a plurality of groups of continuous third inclined surfaces, fourth inclined surfaces and guide grooves which are uniformly distributed, a limiting groove is formed between the third inclined surfaces and the fourth inclined surfaces, the first guide block slides in the guide grooves, and the second guide block slides in a switching manner between the limiting groove and the guide grooves;

and a fifth inclined plane is further arranged between the adjacent first inclined planes, the fifth inclined plane and the first inclined planes are oppositely and continuously arranged, the inclined length of the fifth inclined plane is the same as that of the first inclined plane, or the inclined length of the fifth inclined plane is greater than that of the first inclined plane.

6. The seat height control valve according to claim 5, wherein the first slope has an inclination length equal to or less than an inclination length of the second slope;

the inclined length of the third inclined surface is smaller than that of the fourth inclined surface.

7. The seat height control valve of claim 5, wherein the first, second, third, fourth, and fifth ramps are angled at the same angle.

8. The seat height control valve according to claim 5, wherein an upper end of the valve seat is provided with an inwardly protruding edge to limit an upward moving height of the pressing rod.

9. The seat height control valve according to claim 5, wherein a button is provided at an upper end of the pressing rod, and the pressing rod is driven to lift by manually pressing the button; or the upper end of the pressing rod is connected with a motor, and the motor drives the pressing rod to lift.

10. A vehicle seat comprising a seat height adjustment arrangement, characterized by further comprising a seat height control valve as claimed in any one of claims 1-9.