KR102075042B1 - Folding apparatus for headrest and seat sinking system - Google Patents

Abstract

The present invention relates to a head rest folding device and a seat sinking system that can easily fold the head rest in the seat direction when necessary to increase the internal space utilization of the vehicle, the fixing frame which can be installed on the seat; A rotatable frame rotatably installed on the fixed frame and installed on the head rest; A folding elastic spring having a restoring force formed in a direction in which the rotating frame is folded based on the sheet; And a locking device for selectively locking the unfolded state of the rotatable frame with respect to the seat, so that the restoring force acting on the rotatable frame in the locked state of the rotatable frame can be uniformly distributed to the left and right sides. The locking device may be installed at the center of the rotating shaft of the rotating frame.

Description

Headrest folding device and seat sinking system {Folding apparatus for headrest and seat sinking system}

The present invention relates to a head rest folding device and a seat sinking system, and more particularly, to a head rest folding device and a seat sinking system that can be used to easily fold the head rest in the seat direction to increase the internal space utilization of the vehicle. will be.

In general, the vehicle seat may be composed of a seat cushion for supporting the buttocks when seating the passenger, a seat back for supporting the back of the passenger, and a head rest for supporting the neck and head of the passenger.

On the other hand, the car seat is basically equipped with various functions such as the seat back angle adjustment function (recliner), the seat cushion height adjustment function, and the seat back and forth position adjustment function (slide device) in order to provide appropriate comfort according to the seated passenger. can do.

In addition, in the case of a vehicle having two or three rows or more seats, in addition to the basic functions of the seats described above, an additional function may be variously modified for the position and shape of the seats for the convenience of passengers or to secure a cargo loading space. It may be provided with more.

One of these functions is a tip up function. Tip-up seats can be used, for example, by folding seat backs and seat cushions upright against unused vehicle seats and folding the headrests for this purpose, thereby increasing the space utilization of passengers entering or leaving the rear seats in the vehicle or It may be provided for the purpose of increasing utilization.

There is also a sinking function which is another function. This sinking function is to create a loading space by folding the seat back on the seat cushion or to store the bottom of the body, which also requires folding the head rest for sinking.

In general, the folding device of the conventional head rest is as described in Korean Patent Registration No. 10-1404478, when the rotating cam is rotated with a wire in a locked state where the fixed cam and the rotating cam are engaged with each other, the locking is released and the head rest frame is folded. Can be.

On the other hand, in the conventional head rest folding device, the locking position of the locking device for locking the rotating frame such as the fixed cam and the rotating cam is generally located at the left end or the right end of the rotating shaft of the rotating frame in order to simplify assembly or parts. Can be installed biased.

However, such a head rest folding device with the conventional locking device eccentric is that the restoring force of the elastic spring is biased to one side during locking, and in general, the load is not evenly distributed to the head support supporting the user's head. One side of the head support can easily break parts due to the load, the other side becomes loose and the other side becomes loose, causing noise during vibration of the vehicle, or breakage of the part where the load is concentrated in case of an accident. There were problems.

The present invention is to solve a number of problems, including the above problems, the restoring force of the folding elastic spring during locking is evenly distributed on both sides, the load is evenly distributed on the head support for supporting the user's head, the life of the parts Head, which improves the durability and durability, and prevents the parts from loosening, lowers the noise level when the vehicle vibrates, and distributes the user's head load in the event of an accident to prevent damage to the product and greatly improve the safety of the product. It is an object to provide a rest folding device and a seat sinking system. However, these problems are exemplary, and the scope of the present invention is not limited thereby.

Head rest folding device according to the idea of the present invention for solving the above problems, the fixing frame which can be installed on the seat; A rotatable frame rotatably installed on the fixed frame and installed on the head rest; A folding elastic spring having a restoring force formed in a direction in which the rotating frame is folded based on the sheet; And a locking device for selectively locking the unfolded state of the rotatable frame with respect to the seat, so that the restoring force acting on the rotatable frame in the locked state of the rotatable frame can be uniformly distributed to the left and right sides. The locking device may be installed at the center of the rotating shaft of the rotating frame.

In addition, according to the present invention, the fixing frame may include a first bracket comprising a first rear wall portion fixed to one side of the sheet and a first side wall portion formed on the first rear wall portion; And a second bracket including a second rear wall portion fixed to the other side of the sheet and a second side wall portion formed with the first side wall portion and the first space in the second rear wall portion.

In addition, according to the present invention, the rotating frame, the head support is formed in an inverted U-shape as a whole to support the head rest; And a cam shaft connected to both ends of the head support and formed on the rotation shaft through which the first side wall portion and the second side wall portion rotate freely so as to be foldable.

In addition, according to the present invention, the locking device, a cam member is formed in the center of the cam shaft of the rotating frame, the engaging groove is formed on one side; And a hook member which is formed at the center of the hinge shaft installed in the fixing frame, and the engaging portion is engaged with the locking groove in the forward direction of the hinge shaft on one side thereof.

Further, according to the present invention, the foldable elastic spring, between the first side wall portion and one end of the cam shaft so that the restoring force acting on the rotating frame in the locked state of the rotating frame can be evenly distributed to the left and right sides. A first elastic spring installed in the; And a second elastic spring disposed between the second side wall portion and the other end of the camshaft, wherein the first elastic spring and the second elastic spring are substantially the same distance apart from each other about the cam member. Is installed in, the restoring force of the first elastic spring and the second elastic spring may be substantially the same.

In addition, according to the present invention, the camshaft, the camshaft body to facilitate assembly of the camshaft, the first elastic spring and the second elastic spring; A first camshaft end that can be assembled to one end of the camshaft body, penetrates the first sidewall, and the first elastic spring is installed; And a second camshaft end which may be assembled to the other end of the camshaft body and penetrates the second sidewall, and on which the second elastic spring is installed.

The head rest folding apparatus according to the present invention may further include a locking release device that reversely rotates the hinge shaft to detach the locking portion from the locking groove.

In addition, according to the present invention, the latch release device, one end is fixed to the hinge shaft, the wire bracket is formed in the wire ball receiving groove in the multi-stage; And a wire member comprising a wire ball accommodated in a wire ball receiving groove of the wire bracket and a wire connected to the wire ball.

On the other hand, the seat sinking system according to the spirit of the present invention for solving the above problems, the sheet; A seat sinking device for sinking the seat into an accommodation space of an indoor floor of the vehicle; And a head rest folding device for folding the head rest of the seat when the sheet is sinking, wherein the head rest folding device comprises: a fixed frame which can be installed on the seat; A rotatable frame rotatably installed on the fixed frame and installed on the head rest; A folding elastic spring having a restoring force formed in a direction in which the rotating frame is folded based on the sheet; And a locking device for selectively locking the unfolded state of the rotatable frame with respect to the seat, so that the restoring force acting on the rotatable frame in the locked state of the rotatable frame can be uniformly distributed to the left and right sides. The locking device may be installed at the center of the rotating shaft of the rotating frame.

According to some embodiments of the present invention made as described above, the restoring force of the folding elastic spring is evenly distributed on both sides when the rotating frame is locked around the rotating frame, and the load is evenly applied to the head support for supporting the user's head. It is distributed to improve the life and durability of parts, and to prevent parts from becoming loose, which can lower the noise level when the vehicle is vibrated.In the event of an accident, the user's head load is dispersed to prevent damage to the product and greatly improve the safety of the product. It has an effect that can be made. Of course, the scope of the present invention is not limited by these effects.

1 is an external perspective view of a headrest folding device according to some embodiments of the present invention.
FIG. 2 is an enlarged perspective view of the head rest folding device of FIG. 1. FIG.
3 is a front view of the headrest folding device of FIG.
4 is an exploded front perspective view of a part of the headrest folding device of FIG. 2;
FIG. 5 is an exploded back perspective view of the component of the head rest folding device of FIG. 2; FIG.
6 is a cross-sectional view illustrating a locked state of the head rest folding device of FIG. 2.
FIG. 7 is a cross-sectional view illustrating a unlocking state of the head rest folding device of FIG. 2. FIG.
8 is a cross-sectional view showing a folded state of the head rest folding device of FIG. 2.
FIG. 9 is a perspective view illustrating a folded state of the head rest folding apparatus of FIG. 8. FIG.
10 is a perspective view illustrating a deployed state of a seat sinking system according to some embodiments of the present invention.
FIG. 11 is a side view illustrating the seat sinking system of FIG. 10.
FIG. 12 is a perspective view illustrating an unfolded state of the seat sinking system of FIG. 10.
FIG. 13 is a side view illustrating the seat sinking system of FIG. 12.
FIG. 14 is a perspective view illustrating a sinking state of the sheet sinking system of FIG. 10.
FIG. 15 is a side view illustrating the seat sinking system of FIG. 14.

Hereinafter, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, and the following examples can be modified in many different forms, and the scope of the present invention is as follows. It is not limited to an Example. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In addition, the thickness or size of each layer in the drawings are exaggerated for convenience and clarity of description.

Throughout the specification, when referring to one component, such as a film, region or substrate, being positioned on, "connected", "stacked" or "coupled" to another component, said one configuration It may be interpreted that an element may be in direct contact with, or “coupled to”, “stacked” or “coupled” another component, or that there may be further components interposed therebetween. On the other hand, when one component is said to be positioned on another component "directly on", "directly connected", or "directly coupled", it is interpreted that there are no other components intervening therebetween. do. Like numbers refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various members, parts, regions, layers, and / or parts, these members, parts, regions, layers, and / or parts are defined by these terms. It is obvious that not. These terms are only used to distinguish one member, part, region, layer or portion from another region, layer or portion. Thus, the first member, part, region, layer or portion, which will be discussed below, may refer to the second member, component, region, layer or portion without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "bottom" or "bottom" may be used herein to describe the relationship of certain elements to other elements as illustrated in the figures. It may be understood that relative terms are intended to include other directions of the device in addition to the direction depicted in the figures. For example, if the device is turned over in the figures, elements depicted as present on the face of the top of the other elements are oriented on the face of the bottom of the other elements. Thus, the example "top" may include both "bottom" and "top" directions depending on the particular direction of the figure. If the device faces in the other direction (rotated 90 degrees with respect to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. Also, as used herein, "comprise" and / or "comprising" specify the shapes, numbers, steps, actions, members, elements and / or presence of these groups mentioned. It is not intended to exclude the presence or addition of one or more other shapes, numbers, operations, members, elements and / or groups.

Embodiments of the present invention will now be described with reference to the drawings, which schematically illustrate ideal embodiments of the present invention. In the drawings, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, embodiments of the inventive concept should not be construed as limited to the specific shapes of the regions shown herein, but should include, for example, changes in shape resulting from manufacture.

1 is an external perspective view of a headrest folding device 100 according to some embodiments of the present invention, FIG. 2 is an enlarged perspective view of the headrest folding device 100 of FIG. 1, and FIG. 3 is a headrest of FIG. 1. 4 is an exploded front perspective view of a part of the headrest folding device 100 of FIG. 2, and FIG. 5 is an exploded rear perspective view of a part of the headrest folding device 100 of FIG. 2.

First, as shown in FIGS. 1 to 5, the head rest folding apparatus 100 according to some embodiments of the present invention includes a fixing frame 10, a rotating frame 20, and a folding elastic spring E. ) And locking device 30.

For example, as shown in Figs. 1 to 5, the fixing frame 10 can be fixed to the seat side by screws, bolts, rivets, welding, adhesive or various fasteners, etc. More specifically, for example 4, the fixing frame 10 may include a first rear wall part 11-1 fixed to one side of the sheet and a first side wall formed on the first rear wall part 11-1. The first side wall portion 11 to the first bracket 11 formed of the portion 11-2 and the second rear wall portion 12-1 and the second rear wall portion 12-1 fixed to the other side of the sheet. The second bracket 12 may include a second sidewall part 12-2 formed at −2) and the first space A.

Here, the first rear wall portion 11-1 and the second rear wall portion 12-1 are portions fixed to the sheet, and the first side wall portion 11-1 and the second side wall portion ( 12-2) may serve to freely rotate the rotating frame 20 to be described later.

In addition, as shown in Figure 4, the fixed frame 10 is shown in the form of a separate two-piece consisting of the first bracket 11 and the second bracket 12, in addition to the integral one-piece form, other As a variety of shapes such as three pieces, four pieces can be applied, it is not necessarily limited to the drawings.

Therefore, the headrest can be firmly fixed to the seat by folding the headrest using the fixing frame 10.

Also, for example, as shown in FIGS. 1 to 5, the rotation frame 20 is rotatably installed on the fixed frame 10 and may be installed on the head rest side, more specifically. For example, as shown in Figure 4, the rotating frame 20, the head support 21 is formed in an inverted U shape as a whole to support the head rest, and the head support 21 The cam shaft 22 and the head support are formed on the rotating shaft through which the first side wall portion 11-2 and the second side wall portion 12-2 are freely rotated so as to connect both ends and to allow the folding rotation. It may include a reinforcing bracket (23) for connecting by connecting both ends of the (21).

Here, the shape of the head support 21 is not necessarily limited to the inverted U-shape, all of the head support shape of a variety of forms can be applied.

In addition, the cam shaft 22 may be formed long in the longitudinal direction to install the cam member 31 to be described later.

In addition, the reinforcing bracket 23 is a plate that can be welded to the head support 21 or fixed with various fasteners, and may be formed in a wide variety of shapes or omitted if necessary.

Therefore, the rotation frame 20 is freely rotated to enable a folded state that is folded in the sheet direction or the unfolded state that is developed from the seat, with the cam shaft 22 as the rotation axis with respect to the fixed frame 10. Can be installed.

For example, as illustrated in FIGS. 1 to 5, the folding elastic spring E is a kind of coil spring in which a restoring force is formed in a direction in which the rotating frame 20 is folded based on the sheet. In addition to the coil springs, various types of springs such as various leaf springs, wire springs, and springs can be applied.

Therefore, a restoring force may be applied to the rotary frame 20 to always be folded in the sheet direction by the folding elastic spring E. FIG.

In addition, for example, as shown in FIGS. 1 to 5, the locking device 30 is a device for selectively locking the unfolded state of the rotation frame 20 based on the seat, more specifically, as an example. For example, as shown in FIG. 4, the locking device 30 is formed at a central portion of the cam shaft 22 of the rotating frame 20 and has a cam member 31a formed at one side thereof. 31) is formed in the center of the hinge shaft (H) installed on the fixed frame 10, the engaging portion (T) when the forward rotation of the hinge shaft (H) on one side is engaged with the locking groove (31a) The hook member 32 and the locking portion T may include a locking elastic spring E3 to which a restoring force acts in a direction in which the locking portion T is engaged with the locking groove 31a.

Here, as shown in Figure 4, so that the restoring force acting on the rotating frame 20 in the locked state of the rotating frame 20 can be evenly distributed to the left and right sides of the rotation axis of the rotating frame 20 The locking device 30, that is, the cam member 31 may be installed at the center thereof.

Accordingly, the cam member 31 is provided at the center of the cam shaft 22 so that the restoring force is concentrated, and the hook member 32 is formed to correspond to the cam member 31 at the center of the hinge shaft H. Can be formed.

Therefore, the restoring force of the folding elastic spring E is evenly distributed to both sides when the rotating frame 20 is locked around the rotating frame 20, so that the head support 21 supporting the user's head is loaded. It is evenly distributed to improve the life and durability of parts, and to prevent parts from becoming loose, which can lower the noise level when the vehicle is vibrated.It also distributes the user's head load in the event of an accident to prevent damage to the product and improve the safety of the product. It can greatly improve.

On the other hand, as shown in Figure 4, the folding elastic spring (E) to the rotation frame 20 in the locked state of the rotation frame 20 so as to distribute the restoring force of the folding elastic spring (E). In order to distribute the acting restoring force uniformly to the left and right sides, the first elastic spring E1 and the second side wall portion (1) installed between the first side wall portion 11-2 and one end of the camshaft 22 12-2) and a second elastic spring E2 installed between the other end of the cam shaft 22.

More specifically, for example, the first elastic spring E1 and the second elastic spring E2 are installed at substantially the same distance from opposite sides with respect to the cam member 31, and the first elastic spring The restoring force of E1 and the second elastic spring E2 may be substantially the same.

Therefore, the restoring force or load of the user's head acting on the rotating frame 20 can be substantially equally distributed to the left and right sides of the rotating frame 20.

In addition, as shown in Figure 4, the assembly of the camshaft 22, the first elastic spring (E1) and the second elastic spring (E2) to facilitate the assembly of such evenly distributed components more easily. The camshaft 22 may be assembled to the camshaft body 22-1 and one end of the camshaft body 22-1 to penetrate the first side wall portion 11-2 to improve the efficiency. It may be assembled to the other end of the first camshaft end 22-2 and the camshaft body 22-1 in which the first elastic spring E1 is installed, and penetrates through the second side wall portion 12-2. It may include a second camshaft end 22-3 on which the second elastic spring E2 is installed.

Therefore, as shown in FIG. 4, the assembler prepares the cam member 31 by assembling the cam shaft body 22-1, and then prepares the first side wall portion 11-2 and the second side wall portion ( The first camshaft end 22-2 and the second camshaft end 22-3, in which the first elastic spring E1 and the second elastic spring E2 are pre-assembled, are respectively reserved in 12-2). After assembly, the previously prepared camshaft body 22-1 can be easily assembled with the ends 22-2 and 22-3, and welded to make it more robust.

On the other hand, as shown in Figures 1 to 5, the head rest folding device 100 in accordance with some embodiments of the present invention, the locking portion (T) from the locking portion (T) to be separated It may further include a locking release device 40 for rotating the hinge shaft (H) in reverse.

For example, as shown in Figure 4, the latch release device 40, one end is fixed to the hinge shaft (H), the wire bracket 41 is formed in the wire ball receiving groove (B) in multiple stages, Wire member 42 and the wire (W) consisting of a wire ball (WB) accommodated in the wire ball receiving groove (B) of the wire bracket 41 and a wire (W) connected to the wire ball (WB). It may include a wire tube (WT) to protect. Therefore, the user can easily fold the head rest by pulling the wire.

The folding operation of the head rest folding apparatus 100 according to some embodiments of the present invention will be described.

6 is a cross-sectional view illustrating a locked state of the head rest folding apparatus 100 of FIG. 2, FIG. 7 is a cross-sectional view illustrating a unlocked state of the head rest folding apparatus 100 of FIG. 2, and FIG. 8 is a head of FIG. 2. It is sectional drawing which shows the folded state of the rest folding apparatus 100, and FIG. 9 is a perspective view which shows the folded state of the headrest folding apparatus 100 of FIG.

First, as shown in FIG. 6, the locked state of the head rest folding device 100 according to some embodiments of the present invention is a state in which tension is not applied to the wire W, and the locking elastic spring The locking portion T of the hook member 32 is engaged with the locking groove 31a of the cam member 31 by the restoring force of E3 to support the head support 21 of the rotation frame 20. ) Can remain deployed.

At this time, the restoring force applied to the head support 21 of the rotating frame 20 or the support load of the user's head is uniformly distributed left and right around the cam member 31 to improve durability and load of the parts, It can improve safety in case of an accident.

Subsequently, as shown in FIG. 7, the release state of the head rest folding device 100 according to some embodiments of the present invention is that when the tension is applied to the wire W by the user, the locking elastic spring ( The locking portion T may be separated from the locking groove 31a of the cam member 31 while the hook member 32 is rotated to overcome the restoring force of E3). At this time, the cam member 31 may be freed from the hook member 32, and thus the head support 21 of the rotating frame 20 may also be freed.

Subsequently, as shown in FIGS. 8 and 9, the head support 21 of the freely rotatable rotating frame 10 may be folded in the sheet direction by the restoring force of the folding elastic spring E described above. .

At this time, the restoring force of the folding elastic spring (E) is also uniformly distributed to the left and right sides of the head support 21 of the rotary frame 10 to improve the durability and load of the parts, and improve the operability during folding Can be.

FIG. 10 is a perspective view illustrating an expanded state of the seat sinking system 1000 according to some embodiments of the present disclosure, and FIG. 11 is a side view illustrating the seat sinking system 1000 of FIG. 10.

First, as shown in FIGS. 10 and 11, the seat sinking system 1000 according to some embodiments of the present invention may include a seat 1 and the seat 1 of the interior floor 2 of the vehicle. A seat sinking device 200 for sinking into the accommodation space S and a head rest folding device 100 for folding the head rest HR of the sheet 1 when the sheet 1 is sinking. Can be.

Here, the seat sinking device 200, the sinking lever 210 is installed on the sheet, the interlocking wire (not shown) connected to the sinking lever and interlocked with the wire (W) of the headrest folding device 100 And a plurality of foldable links 220 installed between the sheet 1 and the accommodation space S.

For example, the head rest folding apparatus 100 may have the same configuration and role as the head rest folding apparatus 100 according to some embodiments of the present invention illustrated in FIGS. 1 to 9. Therefore, detailed description is omitted.

Therefore, the seat sinking system 1000 according to some embodiments of the present invention, as shown in FIGS. 10 and 11, in the standby state of the sinking lever 210, may be connected to the headrest folding device 100. By the said sheet sinking apparatus 200, an expanded state can be maintained.

FIG. 12 is a perspective view illustrating an unfolded state of the seat sinking system 1000 of FIG. 10, and FIG. 13 is a side view illustrating the seat sinking system 1000 of FIG. 12.

Subsequently, as shown in FIGS. 12 and 13, when the user operates by pulling or pressing the sinking lever 210, the locking of the headrest folding device 100 and the seat sinking device 200 is performed. As the state is released, the free sheet 1 may be folded by the folding link 220.

At this time, the headrest HR is also folded to the seat 1 by the headrest folding device 100 interlocked with the sinking lever 210 and the interlocking wire, and the accommodating space S and the receiving space when sinking. You can avoid interference.

FIG. 14 is a perspective view illustrating a sinking state of the sheet sinking system 1000 of FIG. 10, and FIG. 15 is a side view illustrating the sheet sinking system 1000 of FIG. 14.

Subsequently, as shown in FIG. 14 and FIG. 15, the freed sheet 1 can be stored in the accommodation space S. FIG.

Accordingly, the seat sinking system 1000 according to some embodiments of the present invention can sink the seat 1 into the accommodation space S of the vehicle interior floor, wherein the head rest HR is also Can be folded so as not to interfere with the accommodation space (S) can improve the user's convenience.

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

10: fixed frame
11: first bracket
11-1: 1st rear wall part
11-2: first side wall portion
12: second bracket
12-1: 2nd rear wall part
12-2: second side wall portion
20: rotating frame
21: Head Support
22: camshaft
22-1: camshaft body
22-2: first camshaft end
22-3: second camshaft end
23: reinforcement bracket
30: locking device
31: cam member
32: no hook
E: folding elastic spring
E1: first elastic spring
E2: second elastic spring
E3: Locking Elastic Spring
40: Jam release device
41: wire bracket
42: wire member
100: headrest folding device
1000: sheet sinking system

Claims (9)

A fixing frame that can be installed on the seat;
A rotatable frame rotatably installed on the fixed frame and installed on the head rest;
A folding elastic spring having a restoring force formed in a direction in which the rotating frame is folded based on the sheet; And
And a locking device for selectively locking the unfolded state of the rotating frame with respect to the seat.
The locking device is installed at the center of the rotating shaft of the rotating frame so that the restoring force acting on the rotating frame in the locked state of the rotating frame can be evenly distributed to the left and right sides.
The fixed frame,
A first bracket comprising a first rear wall part fixed to one side of the sheet and a first side wall part formed on the first rear wall part; And
A second bracket comprising a second rear wall portion fixed to the other side of the sheet and a second side wall portion formed with the first side wall portion and a first space in the second rear wall portion;
Including,
The rotating frame,
A head support formed in an inverted U shape so as to support the head rest; And
A cam shaft connected to both ends of the head support, the cam shaft being formed on the rotation shaft through which the first side wall portion and the second side wall portion rotate freely so as to be foldable;
Including,
The locking device,
A cam member formed at the center of the camshaft of the rotating frame and having a locking groove formed at one side thereof; And
A hook member which is formed at the center of the hinge shaft installed in the fixing frame, and the engaging portion is engaged with the locking groove part at the forward rotation of the hinge shaft on one side;
Including,
The folding elastic spring,
A first elastic spring provided between the first side wall portion and one end of the camshaft so that the restoring force acting on the rotating frame in the locked state of the rotating frame can be evenly distributed to the left and right sides; And
And a second elastic spring installed between the second side wall portion and the other end of the camshaft.
The first elastic spring and the second elastic spring are installed at substantially the same distance to the opposite side with respect to the cam member, the restoring force of the first elastic spring and the second elastic spring is substantially the same,
The camshaft is easy to assemble the camshaft, the first elastic spring and the second elastic spring,
Camshaft body;
A first camshaft end that can be assembled to one end of the camshaft body, penetrates the first sidewall, and the first elastic spring is installed; And
A second camshaft end that can be assembled to the other end of the camshaft body, penetrates the second sidewall, and the second elastic spring is installed;
Including, the head rest folding device. delete delete delete delete delete The method of claim 1,
A catch release device that reversely rotates the hinge shaft to detach the catch from the catch groove;
Further comprising a head rest folding device. The method of claim 7, wherein
The latch release device,
A wire bracket having one end fixed to the hinge shaft and having a wire ball receiving groove formed in multiple stages; And
A wire member comprising a wire ball accommodated in a wire ball receiving groove of the wire bracket and a wire connected to the wire ball;
Including, the head rest folding device. Sheet;
A seat sinking device for sinking the seat into an accommodation space of an indoor floor of the vehicle; And
And a head rest folding device for folding the head rest of the sheet when sinking the sheet.
The head rest folding device,
A fixing frame that can be installed on the seat;
A rotatable frame rotatably installed on the fixed frame and installed on the head rest;
A folding elastic spring having a restoring force formed in a direction in which the rotating frame is folded based on the sheet; And
And a locking device for selectively locking the unfolded state of the rotating frame with respect to the seat.
The locking device is installed at the center of the rotating shaft of the rotating frame so that the restoring force acting on the rotating frame in the locked state of the rotating frame can be evenly distributed to the left and right sides.
The fixed frame,
A first bracket comprising a first rear wall part fixed to one side of the sheet and a first side wall part formed on the first rear wall part; And
A second bracket comprising a second rear wall portion fixed to the other side of the sheet and a second side wall portion formed with the first side wall portion and a first space in the second rear wall portion;
Including,
The rotating frame,
A head support formed in an inverted U shape so as to support the head rest; And
A cam shaft connected to both ends of the head support, the cam shaft being formed on the rotation shaft through which the first side wall portion and the second side wall portion rotate freely so as to be foldable;
Including,
The locking device,
A cam member formed at the center of the camshaft of the rotating frame and having a locking groove formed at one side thereof; And
A hook member which is formed at the center of the hinge shaft installed in the fixing frame, and the engaging portion is engaged with the locking groove part at the forward rotation of the hinge shaft on one side;
Including,
The folding elastic spring,
A first elastic spring provided between the first side wall portion and one end of the camshaft so that the restoring force acting on the rotating frame in the locked state of the rotating frame can be evenly distributed to the left and right sides; And
And a second elastic spring installed between the second side wall portion and the other end of the camshaft.
The first elastic spring and the second elastic spring are installed at substantially the same distance to the opposite side with respect to the cam member, the restoring force of the first elastic spring and the second elastic spring is substantially the same,
The camshaft is easy to assemble the camshaft, the first elastic spring and the second elastic spring,
Camshaft body;
A first camshaft end that can be assembled to one end of the camshaft body, penetrates the first sidewall, and the first elastic spring is installed; And
A second camshaft end that can be assembled to the other end of the camshaft body, penetrates the second sidewall, and the second elastic spring is installed;
Including, sheet sinking system.

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