KR102284666B1 - Device for adjusting incline of seat cushion of car - Google Patents

Abstract

The present invention relates to a seat cushion inclination adjustment apparatus for an automobile. According to the present invention, a front pivoting link and a cushion panel are connected by first and second interlocking links, so that when a cushion frame inclination is adjusted, an inclination of the cushion panel is interlocked. Therefore, since a length of a hinge hole (guide hole) for adjusting the cushion frame inclination can be reduced, it is possible to alleviate a lifting phenomenon of a cushion in an event of a collision accident. An inclination adjustment motor is installed on a front pipe side connecting the cushion frames on both sides. The seat cushion inclination adjustment apparatus for the automobile of the present invention comprises: a front pivot link and a rear pivot link; a motor mounting bracket; a motor; a cushion frame bracket; and a push rod.

Description

Device for adjusting incline of seat cushion of car

The present invention relates to an apparatus for adjusting the inclination of a seat cushion of a vehicle, and more particularly, to an apparatus for adjusting the inclination of a seat cushion of a vehicle in which the inclination adjustment of a cushion frame and a cushion panel are interlocked.

The inclination of the car seat cushion can be adjusted in two ways: by rotating the cushion frame directly or by rotating the cushion panel mounted on the upper surface of the cushion frame.

First, the method of rotating the cushion frame is made in a manner of increasing the inclination by rotating the front end of the cushion frame upward around the hinge point of the rear end of the cushion frame. Since this method rotates the back frame connected to the cushion frame together, the entire seat is tilted. In recent seats, by tilting the entire seat at a predetermined angle to the rear and placing the seat in the so-called 'relax position', the 'relaxation' that relieves seat fatigue by evenly distributing the load concentrated on the passenger's hips to the thighs and back 'Or a 'zero gravity seat' function is added.

Meanwhile, the method of rotating the cushion panel is as follows. The cushion panel is an approximately plate-shaped part that covers the upper part of the first half of the cushion frame, and it receives the weight transmitted through the cushion pad and distributes and transmits it to the cushion frame. The rear end of the cushion panel is hinged to the cushion frame so that the front end can rotate up and down. In other words, when the cushion panel is in close contact with the cushion frame, the surface of the seat cushion maintains an approximately flat normal state. will be.

In the conventional seat cushion inclination adjustment device as described above, each driving motor is separately provided for the operation of the cushion frame and the cushion panel. Therefore, the configuration of the seat cushion inclination adjusting device is complicated, the manufacturing cost is high, and there are problems in that the weight of the seat is increased.

On the other hand, in order to adjust the height of the seat, the front and rear ends of the cushion frame are connected to the seat rail (upper movable rail) via the front and rear pivoting links, respectively (4-section link structure), and provided on the rear pivoting link. The used sector gear was rotated by a motor installed on the cushion frame side (a pinion gear installed on the motor rotating shaft meshed with the sector gear) and driven.

However, in order to be able to adjust the inclination of the cushion frame in the seat in which the height adjustment device is installed as described above, the position of the hinge point of the cushion frame and the front pivoting link must be variable. That is, the hinge hole to which the front pivot link is connected is formed in an arc shape having a predetermined length in the vertical direction, so that the front end of the cushion frame can be rotated up and down around the rear end hinge point even when the height of the seat cushion is fixed. .

However, since the hinge hole of the front pivoting link is formed in an arc shape as described above, when a shock load is applied to the seat rearwardly in a rear collision, the seat cushion rotates rapidly rearward by the length of the hinge hole. Accordingly, there is a problem in that the possibility of injury to passengers increases.

Republic of Korea Patent Publication No. 1014456 (registered on Feb. 7, 2011) Republic of Korea Patent Publication No. 2018-0002271 (published on Aug. 8, 2018)

Accordingly, the present invention has been devised to solve the above problems, and it is possible to operate both the cushion frame and the cushion panel with one motor, and adjust the inclination of the seat cushion of a vehicle to alleviate the lifting phenomenon of the seat cushion in a collision accident. The purpose is to provide a device.

The present invention for achieving the above object is a seat rail and a cushion frame, and a front pivoting link and a rear pivoting link whose both ends are rotatably connected to the front and rear parts thereof, and the front part of the cushion frame on both sides of the seat. A motor mounting bracket fixed to a front pipe rotatably installed on the cushion frame, a motor mounted on the motor mounting bracket, a cushion frame bracket mounted on the cushion frame, retractably installed in the gearbox of the motor and one end of the It is rotatably connected to the cushion frame bracket and includes a push rod for rotating the cushion frame upward while protruding from the gearbox when the motor is operated.

A hinge hole into which a hinge pin connecting the upper end of the front pivoting link and the cushion frame is inserted is formed in an arc shape centered on the front pipe.

A cushion panel having a rear end rotatably connected to the cushion frame is installed, and a front end of the cushion panel is installed to interlock with the upper end of the front pivot link.

One end of the first interlocking link is rotatably connected to the upper end of the front rotating link, the other end is welded to the front pipe, one end of the second interlocking link is welded to the front pipe, and the other end is fixed to the front lower surface of the cushion panel. It is rotatably connected to the cushioned panel bracket.

The hinge hole of the cushion frame to which the rear end of the cushion panel is connected is formed in the form of a long slot in the front-rear direction of the seat.

A pipe hole is formed at the other end of the first interlocking link, a front pipe is inserted into the pipe hole, and the first interlocking link and the front pipe are welded along the circumference of the pipe hole.

The motor mounting bracket may be integrally formed at a lower portion of the pipe hole of the first interlocking link.

According to the present invention as described above, since the cushion frame and the cushion panel have an interlocking structure, it is possible to operate both the cushion frame and the cushion panel with one motor, thereby simplifying the configuration of the seat cushion inclination adjusting device, reducing the number of parts, There is an effect that not only the sheet weight is reduced, but also the manufacturing cost is reduced.

In addition, after the cushion frame is operated, the cushion panel is operated to adjust the inclination of the seat cushion surface, so even if the maximum adjustable inclination angle of the cushion frame is reduced, the required inclination angle can be secured by the cushion panel, so the length of the hinge hole of the cushion frame can be reduced. Accordingly, the lift amount of the seat cushion is reduced during a collision accident, thereby reducing the degree of injury to the occupant.

1 is a bottom perspective view of a seat cushion inclination adjustment device according to the present invention.
Figure 2 is a top perspective view of Figure 1;
Figure 3 is a front view (cushion panel removed state) of the seat cushion inclination adjustment device according to the present invention.
4 is a view of a state in which the motor, the push rod, and the cushion frame bracket in FIG. 3 are removed.
FIG. 5 is a top perspective view of FIG. 4 in a state in which the second pivoting link and the cushion panel bracket are removed.
6 is a view of a state in which the front rotation link and the motor mounting bracket are removed in FIG.
7 is a perspective view of a cushion panel;
Figure 8 (a), (b), (c) is an operation explanatory view showing the height adjustment and inclination adjustment state of the seat cushion.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. The thickness of the lines or the size of the components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or precedent of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 4, the cushion frame 30 is installed on the seat rail 10 via the front pivoting link 21 and the rear pivoting link 22, and on the upper side of the cushion frame 30. A cushion panel 40 is installed.

The cushion panel 40 is a substantially plate-shaped part supporting the first half of the seat cushion, and both ends extending rearwardly are connected to the cushion frame 30 in a rotatable state (H is a hinge pin or a hinge bolt). Accordingly, the cushion panel 40 is rotatable at the front end of the hinge pin (H) in the vertical direction.

A front hinge bracket 61 and a rear hinge bracket 62 are fixed to the upper rail of the seat rail 10 (rail that moves in the front-rear direction with respect to the lower rail fixed to the floor), and these front and rear hinge brackets 61 , 62), the lower ends of the front pivoting link 21 and the rear pivoting link 22 are rotatably connected to each.

The cushion frames 30 on both sides of the seat cushion are connected by a front pipe 51 and a rear pipe 52 that are arranged in parallel to each other in the transverse direction of the vehicle, so that the whole behaves as one body.

The upper end of the rear pivot link 22 is rotatably installed with respect to the rear side of the cushion frame 30 by the rear pipe 52 .

A sector gear is coupled to a non-illustrated rear rotation link among the rear rotation links 22 on both sides of the seat cushion, and a motor for adjusting the seat height installed in the cushion frame drives the sector gear through a pinion, so that the rear rotation link is rearward. It rotates around the hinge bracket, and the entire cushion frame assembly is moved up and down to adjust the seat cushion, that is, the height of the seat.

The front pivoting link 21 is a part having an obtuse-angled gentle curve shape, and the upper end thereof is installed in a rotatable state on one side of the front part of the cushion frame 30 .

In addition, one end of the first interlocking link 110 is rotatably connected to the upper end of the front pivoting link 21 . The other end (the front end of the seat) of the first interlocking link 110 is welded and fixed to the front pipe 51 .

A pipe hole 111 (refer to FIG. 5 ) is formed at the other end of the first interlocking link 110 , and a front pipe 51 is inserted into the pipe hole 111 , and a front pipe is formed along the circumference of the pipe hole 111 . 51 and the first interlocking link 110 are welded to each other.

The upper end of the front pivoting link 21 and one end of the first interlocking link 110 are connected with a hinge pin, and the hinge pin does not fall into the hinge hole 31 formed on one side of the front part of the cushion frame 30. installed, and at this time, the hinge hole 31 has a predetermined length in the vertical direction as an arc shape centered on the front pipe 51 as shown in FIG. 6 . The hinge hole 31 serves as a 'guide hole' for guiding the movement of the hinge pin connecting the front pivoting link 21 and the first interlocking link 110 . Therefore, the connecting portion of the front pivoting link 21 and the first interlocking link 110 can be rotated relative to each other and can move along the hinge hole 31 .

In addition, the second interlocking link 120 is welded and fixed to the front pipe 51 so that the first interlocking link 110 is located on the same line as the first interlocking link 110 on the opposite side of the welded position. The angle between the first interlocking link 110 and the second interlocking link 120 is the cushion frame 30, the cushion panel 40, the front rotating link 21, the first interlocking link 110 and the second interlocking link. Of course, it may be appropriately changed according to mechanical conditions such as the dimensions of parts such as 120 and the set value of the maximum inclination angle of the cushion panel 40 with respect to the cushion frame 30 .

The front pipe 51 is installed in a rotatable state with respect to the cushion frame 30 . Therefore, as the first interlocking link 110 and the front rotating link 21 connecting portion moves in the hinge hole 31, the first interlocking link 110, the front pipe 51, and the second interlocking link 120 are front It rotates integrally around the pipe 51 .

The other end of the second interlocking link 120 is connected to the cushion panel bracket 130 fixed to the lower surface of the front end of the cushion panel 40 in a rotatable state.

As shown in FIG. 4 , a motor mounting bracket 70 on which a motor 80 for tilting and relaxing operation of the cushion frame 30 is mounted is installed under the front pipe 51 .

The motor mounting bracket 70 is mounted on the first bracket 71 and the first bracket 71 forming a support surface in an inclined state in the inner space of the cushion frame 30 (the space between the cushion frames on both sides). It includes a second bracket 72 of a fork shape (= 'C' shape) opened downward. Accordingly, the gearbox of the motor 80 may be inserted between the second brackets 72 to be mounted. The motor 80 may be connected to the gearbox from the outside of the second bracket 72 through an opening formed in the side surface of the second bracket 72 .

The gearbox is mounted on the output side of the motor 80 to reduce the output rotation speed and also serves to guide the operating path of the push rod 90 provided in the gearbox. The push rod 90 is disposed in a direction perpendicular to the rotational axis of the motor 80 and is capable of moving in the front-rear direction through the gearbox. Since the gearbox is installed in an inclined state on the second bracket 72, the push rod 90 is operated to protrude upward and downward in an inclined direction.

If it is possible to mount the motor 80 and its gearbox so that the push rod 90 is connected to the cushion frame bracket 100 to be described below and pushes it upward, the first bracket 71 and the second bracket The two brackets 72 may be manufactured as one bracket, and there is no particular limitation on the structure and shape thereof.

Meanwhile, the motor mounting bracket 70 may be integrally formed with the first interlocking link 110 . That is, as shown in FIG. 5 , the first bracket 71 is integrally formed on the lower portion of the pipe hole 111 of the first interlocking link 110 , and the second bracket 72 is formed on the lower surface of the first bracket 71 . ) will be installed. As described above, since the first bracket 71 and the second bracket 72 can be integrally formed, the entire first interlocking link 110 and the motor mounting bracket 70 can be manufactured as a single part, of course. am.

In this way, when the first interlocking link 110 and the motor mounting bracket 70 are manufactured as one integral part, each individual part (the first interlocking link 110 , the first bracket 71 , the second bracket 72 ) ))), since there is no assembly tolerance between parts compared to the case of separately manufacturing and assembling, it becomes possible to always install the motor 80 at the correct position.

Since the motor 80 has to push up the cushion frame 30 by protruding the push rod 90 obliquely upward, the size of the operating force required to rotate the cushion frame 30 upward may vary depending on the position thereof. Therefore, since the motor 80 can always be mounted at a designed predetermined position as described above, it is possible to more efficiently push the cushion frame 30 upward in terms of operating efficiency of the device.

One end (upper end) of the push rod 90 is rotatably connected to the cushion frame bracket 100 fixed to the cushion frame 30 . The cushion frame bracket 100 is mounted on the side of the cushion frame 30 firmly enough to transmit the pushing force of the push rod 90 to the cushion frame 30 against the load caused by the weight of the occupant.

The cushion frame bracket 100 is from the position of the working surface of the first interlocking link 110 and the front rotating link 21 so that the push rod 90 does not interfere with the first interlocking link 110 and the front rotating link 21 . A connection portion of the push rod 90 is formed at a position sufficiently spaced apart in the sheet inner direction. That is, the cushion frame bracket 100 has a structure protruding from the inner surface of the cushion frame 30 in the inner direction of the seat.

Meanwhile, as shown in FIG. 7 , the hinge hole 41 formed at the rear end of the cushion panel 40 is formed in a long slot shape in the front-rear direction of the seat. That is, when the cushion panel 40 is rotated about the hinge pin (H) (the position of the hinge pin (H) is fixed to the cushion frame 30), the length of the hinge hole 41 in the front-back direction position change is possible.

The operation of the seat cushion inclination adjustment device for a vehicle according to the present invention will now be described.

8 (a) and (b) show the operating state when adjusting the height of the general seat. (a) is a state in which the front pivoting link 21 and the rear pivoting link 22 are rotated up to the maximum and the cushion frame 30 is maximally farther from the seat rail 10, so the height of the seat is the highest. . (b) is a state in which the front pivoting link 21 and the rear pivoting link 22 are maximally rotated downward and laid down, and the seat rail 10 and the cushion frame 30 approach the maximally and the height of the seat is the lowest. am.

When the height of the seat is adjusted as described above, the seat cushion is maintained in a horizontal state, and at this time, the upper hinge pin of the front pivoting link 21 is located at the upper end of the corresponding hinge hole 31 . Naturally, the connection part of the front rotation link 21 and the first interlocking link 110 is also located at the upper end of the hinge hole 31, and thus the first interlocking link 110 and the second interlocking link 120 are approximately horizontal. is positioned, the cushion panel 40 also maintains an approximately horizontal state in contact with the front upper surface of the cushion frame 30 . That is, when only the height adjustment of the seat is made as in (a) and (b), there is no change in the distance L1 between the end of the cushion frame 30 and the end of the cushion panel 40.

Figure 8 (c) shows a state in which the inclination of the seat cushion is maximally increased by the operation of the seat cushion inclination adjusting device according to the present invention. (c) shows a state in which the inclination of the seat cushion is adjusted in a state where the height of the seat is the lowest, but the inclination of the seat cushion is adjusted so that the height of the seat is any height within the range of (a) to (b). Everything is possible in the state of having.

When the motor 80 is operated in a state where the cushion frame 30 is horizontal (the operation button is preferably installed on the outer surface of the seat cushion so that the occupant can adjust it), the push rod 90 protrudes upward and the cushion The cushion frame 30 is pushed upward through the frame bracket 100 . Accordingly, the cushion frame 30 is rotated upwardly around the rear pipe 52, and the inclination is gradually increased. Therefore, by controlling the operation of the motor 80 to adjust the upward protrusion amount of the push rod 90, the inclination of the cushion frame 30 can be adjusted to adjust the inclination of the seat cushion as desired.

On the other hand, as the push rod 90 protrudes to increase the inclination of the cushion frame 30 , the upper hinge point of the front rotation link 21 , that is, the connection part of the front rotation link 21 and the first interlocking link 110 is a hinge It gradually moves downward from the upper part of the hole 31 . As the upper end of the front pivoting link 21 moves downward of the hinge hole 31 , one end of the first interlocking link 110 connected thereto also moves downward of the hinge hole 31 .

Therefore, the front pipe 51 to which the other end of the first interlocking link 110 is welded is rotated in the same direction, and thus the second interlocking link 120 having one end welded to the front pipe 51 is connected to the front pipe 51 and the front pipe 51 . rotated together in the same direction. Therefore, the other end of the second interlocking link 120 pushes the cushion panel bracket 130 upward, and the cushion panel 40 is rotated upward around the hinge point (hinge pin (H)) of the rear end. The slope is increased. Accordingly, the distance L2 between the cushion frame 30 side end and the cushion panel 40 side end is increased (L1 < L2).

When the inclination of the cushion panel 40 is increased, 'the hinge point of the second interlocking link 120 and the cushion panel bracket 130' and the 'cushion frame 30 and The distance between the hinge points of the cushion panel 40 is reduced. For this purpose, as described above, the hinge hole 41 at the rear end of the cushion panel 40 is formed in the form of a long slot in the front-rear direction, and accordingly, the cushion panel As the 40 rises, the hinge hole 41 moves backward within the length range to absorb the structural change as described above.

As described above, when the push rod 90 protrudes by the operation of the motor 80 and pushes the cushion frame 30 (to be precise, the cushion frame bracket 100), the motor 80 is mounted by the reaction reaction thereof. 70 is subjected to a force directed toward the front of the seat. That is, the motor mounting bracket 70 receives a force rotating in the clockwise direction in the drawing centering on the front pipe 51 , and at this time, the motor mounting bracket 70 and the first interlocking link 110 are welded to the front pipe 51 . Since it is made or integrally manufactured and operates as a single part, the force rotated clockwise around the front pipe 51 also acts on the first interlocking link 110 .

Accordingly, the connecting portion of the first interlocking link 110 and the front pivoting link 21 can be moved downward of the hinge hole 31 more easily. That is, as described above, the motor mounting bracket 70 can be rotated integrally with the first interlocking link 110, so that it is possible to rotate the cushion frame 30 upward with a smaller force, and accordingly, a small capacity motor It has the advantage of being able to use it, thereby reducing the manufacturing cost.

As described above, in the vehicle seat to which the seat cushion inclination adjustment device according to the present invention is applied, the motor mounting bracket 70 is rotatably installed with the front pipe 51 or the first interlocking link 110 integrally, and the motor mounting By driving the motor 80 mounted on the bracket 70 to push the front end of the cushion frame 30 upward, the inclination can be adjusted, and at this time, the first The cushion panel 40 is interlocked through the interlocking link 110 and the second interlocking link 120 and rotated upward at the same time to obtain an additional inclination angle by the cushion panel 40 .

That is, when the inclination angle of the cushion frame 30 plus the inclination angle of the cushion panel 40 becomes the inclination of the upper surface of the seat cushion felt by the occupant, if the same inclination is aimed at, the cushion frame 30 compared to the conventional case It is possible to design a small range of motion.

Therefore, it is possible to reduce the vertical length of the hinge hole 31 that determines the movable range of the cushion frame 30, and accordingly, when the seat cushion lifting phenomenon occurs in a collision accident, the lifting amount is reduced, thereby reducing the degree of injury to the occupant. .

In other words, according to the present invention, it is possible to reduce the length of the hinge hole 31 (guide hole) of the cushion frame 30 formed for tilting while sufficiently securing the tilting amount of the seat cushion for the relaxation operation. It is possible to alleviate the lifting phenomenon of the seat cushion.

In addition, by the interlocking operation as described above, the inclination adjustment of the cushion frame 30 and the cushion panel 40 is possible with only one motor 80, so that the number of motors and the driving force transmitting parts connecting the motor and the inclination adjustment target part number is reduced Accordingly, the structure of the device is simplified, the weight is reduced, and the manufacturing cost is reduced.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and those of ordinary skill in the art can make various modifications and equivalent other embodiments therefrom. You will understand that it is possible. Therefore, the true technical protection scope of the present invention should be defined by the following claims.

10: seat rail 21: front pivot link
22: rear rotation link 30: cushion frame
40: cushion panel 51: front pipe
52: rear pipe 61: front hinge bracket
62: rear hinge bracket 70: motor mounting bracket
71: 1st bracket 72: 2nd bracket
80: motor 90: push rod
100: cushion frame bracket 110: first interlocking link
111: pipe hole 120: second interlocking link
130: cushion panel bracket H: hinge pin

Claims (7)

The seat rail and the cushion frame and the front and rear portions thereof are rotatably connected at both ends to the front and rear rotation links;
a motor mounting bracket connected to the front part of the cushion frame on both sides of the seat and fixed to the front pipe rotatably installed on the cushion frame;
a motor mounted on the motor mounting bracket;
a cushion frame bracket mounted on the cushion frame;
A push rod installed in the gearbox of the motor to retract and retract and one end is rotatably connected to the cushion frame bracket to rotate the cushion frame upward while protruding from the gearbox when the motor is operated;
A seat cushion inclination adjustment device for a vehicle, characterized in that a hinge hole into which a hinge pin connecting the upper end of the front pivoting link and the cushion frame is inserted is formed in an arc shape centered on the front pipe. delete The method according to claim 1,
A cushion panel having a rear end rotatably connected to the cushion frame is installed, and a front end of the cushion panel is installed to interlock with the upper end of the front pivot link. 4. The method according to claim 3,
One end of the first interlocking link is rotatably connected to the upper end of the front rotating link, the other end is welded to the front pipe, one end of the second interlocking link is welded to the front pipe, and the other end is fixed to the front lower surface of the cushion panel. A seat cushion inclination adjustment device for a vehicle, characterized in that it is rotatably connected to a cushion panel bracket. 4. The method according to claim 3,
The hinge hole of the cushion frame to which the rear end of the cushion panel is connected is formed in the form of a long slot in the front-rear direction of the seat. 5. The method according to claim 4,
A pipe hole is formed at the other end of the first interlocking link, a front pipe is inserted into the pipe hole, and the first interlocking link and the front pipe are welded along the circumference of the pipe hole. Device. 7. The method of claim 6,
The seat cushion inclination adjustment device for a vehicle, characterized in that the motor mounting bracket is integrally formed at a lower portion of the pipe hole of the first interlocking link.

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