KR20040092065A - Car seat reclining device and method - Google Patents

Abstract

PURPOSE: A reclining device of a seat for a vehicle and a reclining method are provided to enable fine control of an angle and to make the controlled state become a firmly fixed state. CONSTITUTION: A reclining device of a seat for a vehicle is arranged between connection parts(11,21) to which a cushion frame(10) and a seat back frame(20) are connected. The reclining device comprises a central fixed shaft penetrating the connection parts and an operating lever(40) rotating at a predetermined angle in a state of being supported on the central fixed shaft. The reclining device comprises an installation-uneven part(22) of a circular shape arranged to the connection part of the seat back frame; at least one working pin(41) arranged to the operating lever; an expansion cam(50) installed to the inner center of the installation-uneven part; expansion blocks(60) installed to the outer periphery of the operating lever; and circular friction balls(80) of a roller or ball shape installed in more than two rows between the expansion blocks and the inside of the installation-uneven parts. The working pin is projected toward the installation-uneven part of the seat back frame through the connection part of the cushion frame. The expansion cam has at least two cam-curved surfaces(51) to the outer puerperal surface. The expansion blocks are divided in more than two in a close contact state with the cam-curved surfaces of the expansion cam.

Description

Car seat reclining device and method

The present invention relates to a seat reclining apparatus for a vehicle, and more particularly, to a reclining apparatus for adjusting a seat back of a car to a desired angle in a forward and backward direction in order to fit a body of a rider, the configuration being simple and at any angle. The present invention relates to a reclining apparatus and a reclining method of a new method, which allow stepless control.

As is well known, by installing a reclining device to allow the backrest to be angled forward and backward on the seat in which the driver and the occupant of the vehicle are seated, the occupant's riding position can be maintained to be suitable for driving or adjusted to any required angle. This reclining device is installed at the part where the cushion frame on which the seat plate is installed and the seat back frame on which the backrest is installed, and when the operating lever projecting to the side is operated, the backrest of the seat becomes movable and when the lever is released It is configured to be fixed at an adjusted angle.

Looking at the conventional reclining apparatus that performs this function briefly, after forming a circular recess in the connection portion of the seat back frame to which the backrest is connected, but a small size and uniformly formed irregularities (gear or tooth) on the entire inner surface, The connection portion of the cushion frame coupled thereto constitutes an operating plate configured at the distal end, which can be engaged with the uneven portion of the seat back frame, and is configured to expand or contract the operating plate in the radial direction by the action of the operating lever. .

As a result of this action, in the state where the seat of the vehicle is fixed, the operation plate is extended inside the circular groove, and the uneven portions of each other are engaged so that the backrest cannot be rotated, and in this state, the angle of the backrest is adjusted. To this end, when the operating lever is folded, the operating plate contracts in the center direction, so that the uneven portions are spaced apart from each other so that the backrest can rotate.

After adjusting the angle to the desired angle, release the operating lever and the operating plate will expand again to engage the uneven part and thus fix the backrest.

The problem with the conventional reclining device is that it is difficult to finely adjust at a desired angle because the unevenness is fixed at the desired position first, and the unevenness formed at the tip of the operating plate or the inside of the circular unevenness is precisely interlocked with each other at any angle. Since the irregularities should be formed very precisely, according to the disadvantage that the manufacturer is very difficult and expensive.

In addition, such irregularities may be formed with a small number while increasing the size thereof, but in this case, it is difficult to fix the angle of the backrest precisely at a desired position. There is a problem that must be formed as many numbers.

As described above, when the uneven portion for fixing is formed with a small number and a large number, the angle to be adjusted may be relatively fine, but the uneven portion may be worn or the uneven portion may be inadvertently engaged during use, resulting in a risk that the backrest may accidentally fall during operation. There was also.

In order to prevent this, the reclining apparatus requires a strong heat treatment to the uneven portion and has a problem that requires a thorough inspection, as well as a cumbersome operation such as paying attention to the cleanliness in order to prevent the inflow of foreign substances.

In consideration of the problems of the conventional reclining apparatus described above, the angle adjustment, which is the basic function of the reclining, is made without permission, so that the adjustment to the desired angle can be made very finely, and the adjusted state is very firm. It is an object of the present invention to provide a reclining apparatus of a new concept completely different from the conventional one, such as being fixed.

1 is a front view of the reclining apparatus according to the present invention (seen in A-A of FIG. 2)

2 is an assembled cross-sectional view of the reclining apparatus according to the present invention.

Figure 3 is a front view of the cushion frame of the reclining apparatus according to the present invention

4A and 4B are front and side views of the expansion cam of the reclining apparatus according to the present invention.

5a and 5b is an extended block front and side view of the reclining apparatus according to the present invention

6 is a cam plate front view of the reclining apparatus according to the present invention.

Figure 7 is another embodiment of the expansion block action of the present invention

Figure 8 is another embodiment of the action of the expansion block of the present invention

Figure 9 is another embodiment of the expansion block outer surface of the present invention

*** Description of the symbols for the main parts of the drawings ***

10: cushion frame 11: connection portion

12: guide protrusion 13: guide protrusion

20: Seat back frame 21: Connection part

22: installation recess 30: center fixed shaft

40: operating lever 41: action pin

50: extended cam 51: cam curved surface

52: pin hole 53: return pin

60: expansion block 61: guide pin

62: guide passage 63: support pin

70: cam plate 71: return pin hole

72: long hole 80: circular friction ball

80 ': Fixed circular friction ball

The present invention has an installation recess in the connection portion of the seat back frame and inserts two or more circular friction spheres in the inner edge of the seat back frame, and in the center of the circular friction sphere inside the installation recess, the expansion cam rotates by the action of the operation lever The expansion block acts by pressing the circular friction sphere as it is opened outward by the cam, and the expansion cam is operated by the operation lever, and the expansion block is opened so that the circular friction sphere is in close contact with the inner side of the circular groove. It is characterized by being fixed.

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

1 and 2 are front and side cross-sectional views of the overall assembly configuration of the reclining apparatus according to the present invention.

Reclining apparatus of the present invention is configured between the cushion frame 10, the seat plate of the vehicle seat is installed, and each connecting portion 11, 21 to which the seat back frame 20 is installed, the backrest is connected, as described above, The center fixing shaft 30 penetrating through the connecting portions 11 and 12 and the operating lever 40 is supported by the center fixing shaft 30 to rotate a certain angle.

First, the connecting portion 21 of the seat back frame 20 constitutes an installation recess 22. The installation recess 22 is based on a circular shape with a little depth, and a slight irregularity in such a circle, or Applying regular fine bends or giving more than eight angles as shown in the drawing can achieve a more clear action.

In addition, one or more action pins 41 are installed in the operation lever 40 to protrude in the direction of the installation recess 22 of the seat back frame 20 while penetrating the connection portion 11 of the cushion frame 10. An expansion cam 50 having two or more cam curved surfaces 51 whose diameters are gradually increased on the outer circumferential surface of the inner center 22 and a pin hole 52 into which the action pins 41 of the operating lever 40 are inserted. When the operating lever 40 is rotated by inserting), the expansion cam 50 is rotated by the action pin 41.

The configuration of the expansion cam 50 is shown well in FIGS. 5A and 5B.

In addition, when the expansion cam 50 rotates by inserting two or more expansion blocks 60 in close contact with the cam curved surface 51 of the expansion cam 50 on the outer circumference of the operating lever 40, the cam curved surface 51 The expansion block 60 is configured to open as a whole by the friction with).

The configuration of the expansion block 60 is shown in detail in FIGS. 5A and 5B.

A circular friction ball 80 of two or more rows is inserted between the expansion block 60 and the installation recess 22. The circular friction ball 80 may be configured in the form of a roller or ball form as shown in the figure.

The circular friction ball 80 may be inserted in a state in which the whole is movable, but in order to obtain a more powerful fixing force, the fixed circular friction ball 80 'which is fixed to the connection part 11 of the cushion frame 10 is fixed. It can also be configured.

In this case, the circular friction sphere 80 is pushed toward the fixed circular friction sphere 80 'when a force is applied to move the backrest while the backrest is fixed at an adjusted angle by releasing the operating lever 40. (80) In close contact with each other, the expansion block 60 and the installation recess 22 have an effect of being more closely adhered to the inner surface, and thus a more powerful fixing action may be made.

As another means for obtaining a strong fastening force, as shown in Figure 9 may be formed on the outer surface of the expansion block 60, as shown in the mounting recess 22, or may form regular or irregular fine bends. This structure also obtains the effect that the circular friction ball 80 is tightly sandwiched between the expansion block 60 and the installation recess 22 without clouds or slipping.

In addition, when the expansion block 60 is expanded by the action of the expansion cam 50 while the backrest is fixed, the operation of the expansion block 60 is smoothly made when the operating lever 40 is wetted for adjustment. As a configuration for holding, as shown in Figures 4 to 6, the cam plate 70 is installed on the expansion cam 50 and the expansion block 60, protruding the return pin 53 on the expansion cam 50 The cam plate 70 has a return pin hole 71 into which the return pin 53 is inserted.

In addition, an arc-shaped long hole 72 is formed at the edge of the return pin hole 71, but the center of the beginning and end of the long hole 72 is configured to have a deviation of the distance that the expansion block 60 extends. The upper surface of the 60 was formed with a guide pin 61 to be inserted into the long hole (72).

Therefore, when the operation lever 40 is not moved, as shown in FIG. 1, the expansion cam 50 expands the expansion block 60 so that the seat back frame 20 is fixed. In this case, the guide pin 61 is Located in the distant part of the center of the long hole 72, when the operating lever 40 in this state, the expansion cam 50 removes the force pushing the expansion block 60, the circular friction ball 80 is the seat back frame ( Since 20) is not pressed, the seat back frame 20 is free to move.

That is, the cam hole 70 is rotated by the expansion cam 50 and the long hole 72 pulls the guide pin 61 due to the above configuration for contracting the expansion block 60 to create a more reliable free state. The expansion block 60 is quickly contracted because it acts to lower.

When the operation lever 40 is released in such a state, the operation lever 40 is returned by the known operation lever return spring 49, restoring the expansion cam 50, and thus applying a force to push the expansion block 60 again. Since the circular friction ball 80 is tightly sandwiched between the expansion block 60 and the inner surface of the installation recess 22, the seat back frame 20 is to be fixed.

In addition, the expansion block 60 may add a configuration for guiding the movement in the radial direction accurately in the process of contraction and expansion, by which the expansion block 60 has a more clear action.

First, such a configuration in Figures 1 to 3, by forming a guide protrusion 12 in the cushion frame 10 connection portion 11 of the portion corresponding to the space between each expansion block 60, such a guide protrusion By extension 12, the expansion block 60 has the correct movement.

In another configuration, as shown in FIG. 7, the guide passage 62 is formed on one surface of the expansion block 60, and the guide protrusion 13 is formed on the connection portion 11 of the cushion frame 10. The block 60 is guided to move smoothly in a straight line.

In another embodiment, in the process of moving the expansion block 60, as shown in the above example, instead of moving in a straight line in the radial direction, an arc-shaped movement is performed based on any one point. As can be seen, when one end of the expansion block 60 is fixed by the support pin 63, and the expansion cam 50 is operated, the expansion block 60 performs circular arc movement around the support pin 63 while circular friction It is to press the sphere (80).

In the drawings, reference numeral 14 denotes a fixed shaft hole, 15 a working pin through hole, 28 a spring-loading protrusion of the seat back frame, and 29 a backrest return spring.

It looks at the operation of the present invention having the configuration as described above.

First, when the backrest of the seat is fixed, the expansion cam 50 is in a state pushing the expansion block 60. Therefore, since the expansion block 60 pushes the circular friction sphere 80, the circular friction sphere 80 is in close contact with each other on the inner surface of the installation recess 22 of the seatback frame 20, so the seatback frame 20 can move. It is in a state without.

In more detail, the circular friction sphere 80 is pressed against the inner surface of the installation recess 22 by the pressure of the expansion block 60 is point contact (when the circular friction sphere is a ball) or line contact (circular friction sphere) Is a roller), but since the number of circular friction spheres 80 is a large number, multiplying one friction force by the number of circular friction spheres 80 by the number of circular friction spheres 80 yields a very strong friction force so that it is firmly fixed. There is a number.

In addition, since the circular friction ball 80 is arranged in two or more rows, it is possible to apply a uniform pressure to the inner surface of the installation recess 22 while finding an empty space between each other.

When the inner surface of the installation recess 22 forms a garden, when the seatback frame 20 is strongly applied to rotate, the circular friction sphere 80 may generate a cloud or slip between the inner surface of the installation recess 22. There is concern.

Therefore, in order to more clearly prepare for this configuration, the inner surface of the installation recess 22 is applied with regular or irregular and fine bends or blocks the rolling action of the circular friction ball 80 when forming an angle of 8 or more angles. It is possible to maintain a firm fixed state. Even in this case, since the circular friction sphere 80 is two rows or more, the uniform friction force is applied as a whole without the circular friction sphere 80 flowing while finding empty spaces therebetween.

When the operating lever 40 is tilted to adjust the backrest in the fixed state as described above, the action pin 41 rotates the expansion cam 50 and thus the cam curved surface 51 rotates toward the smaller diameter, thereby expanding the expansion block ( The force pushing 60) is removed. This means that the circular friction ball 80 is sandwiched between each other and the force used to fix the connecting portion 21 of the seat back frame 20 is removed, and thus the seat back frame 20 is rotated about the center fixed shaft 30. This will be possible.

When the occupant leans backwards, the backrest is pushed backwards to adjust to the desired angle, and when the backrest is released from the backrest, the seatback frame 20 installed with the backrest rotates forward with the force of the backrest return spring 29, and the adjustment is completed. After the operation lever 40 is released, the seat back frame 20 in which the backrest is installed is fixed as it is.

That is, the actuating lever 40 returns to its original state by the force of the actuating lever return spring 49, and the expansion cam 50 exerts a force to expand the expansion block 60, and again the circular friction ball 80 ) Is sandwiched between the inner surface of the installation recess (22).

In the above release action, that is, the action of enabling the adjustment of the seat back frame 20 by flipping the operation lever 40, the expansion block 60 is connected to the circular friction sphere 80 by the expansion cam 50. The pushing force is removed, but if the expansion block 60 is contracted so quickly it will be able to adjust more accurately and easily.

As a result of this, when the seat back frame 20 is fixed, the guide pin 61 of the expansion block 60 is located at a distance far from the center of one side of the long hole 72 formed in the cam plate 70. Then, when the operating lever 40 is flipped for adjustment, the return pin 53 of the expansion cam 50 rotates the cam plate 70, so that the inclined long hole 72 of the cam plate 70 is extended to the expansion block 60. Guide pin 61 of the) is drawn into the inner end is that the expansion block 60 is contracted. Therefore, the expansion cam 50 during the adjustment action to remove the force applied to the expansion block 60 and at the same time to quickly contract the expansion block 60 can be smoothed release action.

And looks at the embodiment for the action of guiding the expansion and contraction of the expansion block 60.

1 to 3, the expansion and contraction of the expansion block 60 is guided by the guide protrusions 12 formed in the cushion frame 10 at positions between the expansion blocks 60, and FIG. 7. According to the embodiment of the guide passage 62 formed in the expansion block 60 to the guide protrusion 13 formed on the connection portion 11 of the cushion frame 10 is guided by expansion and contraction of the expansion block 60 It is to guide smoothly.

In addition, according to the embodiment of Figure 8 by supporting the expansion block 60 with the support pin 63 to push the circular block 80 by causing the expansion block 60 to rotate about the support pin 63, In this case, a separate guide configuration is not necessary.

In the present invention as described above, in constructing the reclining apparatus of the seat, by eliminating the conventional method of engaging the uneven parts such as gears by implementing the adjustment using a ball or a roller, fewer failures and easy to manufacture, any angle It is to be able to adjust the angle of the backrest without permission, it is a useful invention that can be used very conveniently and safely.

Claims (8)

After the installation part is provided at the connection part of the seat back frame, two or more rows of roller or ball-type circular friction spheres are inserted into the inner edge of the seat back frame, and the circular friction sphere is moved outwardly by the return action of the operating lever at the center of the circular friction sphere. A circular friction sphere is sandwiched between each other by pushing in the direction to apply a pressure on the inner surface of the installation recess, the seat back frame is characterized in that the seat back frame is fixed. A reclining device is formed between each of the connecting parts 11 and 21 to which the cushion frame 10 on which the seat plate of the vehicle seat is installed and the seat back frame 20 on which the backrest is installed, and the connecting parts 11 and 12. In the seat reclining device for an automobile comprising a center fixed shaft 30 penetrating through and the operating lever 40 is supported by the center fixed shaft 30 to rotate a predetermined angle, The installation recess 22 formed in the connecting portion 21 of the seat back frame 20 and having a slight depth and having a circular shape, One or more action pins 41 formed on the operating lever 40 and protruding toward the installation recesses 22 of the seatback frame 20 while penetrating through the connection portion 11 of the cushion frame 10, An expansion cam 50 installed at the inner center of the installation recess 22 and having at least two cam curved surfaces 51 whose diameters gradually increase on the outer circumferential surface thereof, and the action pins 41 of the operation lever 40 are coupled; An expansion block 60 installed on an outer circumference of the operation lever 40 and in close contact with the cam curved surface 51 of the expansion cam 50; Reclining device for a car seat, characterized in that consisting of a circular friction sphere 80 of the roller or ball form installed in two or more rows between the expansion block 60 and the inner surface of the installation recess 22. The method of claim 2, The seat reclining device for a vehicle, characterized in that the inner surface of the installation recess 22 and the outer surface of the expansion block 60 to form a slight irregular or regular bending or more than 8 angles. The method of claim 2, When the expansion block 60 is expanded by the action of the expansion cam 50 while the backrest is fixed, the expansion block 60 is smoothly contracted when the operation lever 40 is flipped for adjustment. As a configuration for The cam plate 70 is installed on the expansion cam 50 and the expansion block 60, but the return pin 53 protrudes from the expansion cam 50, and the return pin 53 is inserted into the cam plate 70. Forming return pin holes 71, In addition, an arc-shaped long hole 72 is formed at the edge of the return pin hole 71, but the center of the beginning and end of the long hole 72 is configured to have a deviation of the distance that the expansion block 60 extends. The seat reclining device for a vehicle, characterized in that the upper surface of the (60) is formed with a guide pin (61) inserted into the long hole (72). The method of claim 2, The expansion block 60 is configured to guide the process of contraction and expansion, and constitutes the guide protrusion 12 on the connection portion 11 of the cushion frame 10 corresponding to the space between each expansion block 60. An automobile seat reclining apparatus, characterized in that. The method of claim 2, The expansion block 60 is configured to guide the process of contraction and expansion, the guide passage 62 is formed on one surface of the expansion block 60 and the guide protrusion 13 on the connection portion 11 of the cushion frame 10. Car seat reclining apparatus, characterized in that it forms a). The method of claim 2, The expansion block 60 is configured to perform an arc-shaped motion without the need for a guide. When the expansion cam 50 is operated by fixing one end of the expansion block 60 with the support pin 63, the expansion block 60 is Car seat reclining device, characterized in that configured to press the circular friction sphere (80) while the circular motion around the support pin (63). The method of claim 2, Car seat reclining device, characterized in that one or more of the circular friction sphere (80) is fixed to the connecting portion (11) of the cushion frame (10).