JP5076712B2 - Sheet structure - Google Patents

Description

  The present invention relates to a sheet structure. More specifically, the present invention relates to a seat structure having a seat back that serves as a backrest for a seated person and a headrest that serves as a headrest.

2. Description of the Related Art Conventionally, some rear seats of a vehicle have a retractable structure in order to make the installation space available as a cargo space.
Here, Patent Document 1 below discloses a technique in which a headrest is fitted into an upper portion of a seatback so that the seatback can be compactly stored in a configuration in which the seatback has a retractable structure. In this disclosure, the headrest has an inverted L shape, and the headrest can be stored in a compact manner so that the upper corner portion of the seat back contacts the inner corner portion of the inverted L shape. Therefore, when the seat back is brought down, the seat back can be brought down with a small turning miracle by keeping the headrest in the retracted state described above.
Here, when the headrest is in its retracted state, the support portion for receiving the back of the seated occupant is located on the front side of the seat back and protrudes from the seat back, and prevents the seat occupant from leaning on the seat back. It is the composition to do. As a result, the seat back is configured such that the seated person cannot normally lean without the headrest being pulled out to the use position.
Therefore, in the headrest having the above-described configuration, the lower end portion of the support portion extending in a hanging shape comes to a position where it can easily interfere with the back of the seated person, so that the seated person can easily feel a foreign object. Therefore, in this disclosure, the headrest is configured to be hingedly connected to a stay that becomes a support column at the upper end position thereof, and the support portion is configured to be released to the rear side by being pushed against the back of the seated person. Thereby, the foreign object feeling which a seated person receives by interference with a support part can be relieved.

JP 2004-229969 A

  However, in the related art disclosed above, the headrest is configured to swing the entire support portion backward by being pushed by the back of the seated person, so that the manner of supporting the back of the head by the support portion changes.

  The present invention has been devised to solve the above-described problems, and the problem to be solved by the present invention is to provide a headrest with a blocking structure that prevents seating when the headrest is in the retracted position. Even when the headrest is provided, when the headrest is in the use position state, it is intended to prevent the seated person from feeling a foreign object due to interference with the blocking structure without changing the support mode of the head.

In order to solve the above problems, the sheet structure of the present invention takes the following means.
A first invention is a seat structure having a seat back that serves as a backrest for a seated person and a headrest that serves as a headrest. The headrest is assembled to the upper part of the seat back through a stay as a support column so as to be movable up and down. As a result, the headrest is movable between a use position where the head of the seated person can be received at a position on the rear side of the headrest and a storage position deviated downward from the use position. The headrest is connected to a seating prevention member that is positioned on the backrest surface of the seatback when the seatrest is in the retracted position and can prevent the seated person's back from leaning on the seatback. The seating prevention member is coupled to the headrest so that it can take an avoidance posture that is out of an interference position that interferes with the back of the seated person when the headrest is in the use position state by a variable structure that makes the posture relative to the headrest variable.
According to the first aspect of the present invention, when the headrest is lowered to the retracted position, the seating preventing member is positioned on the backrest surface of the seatback and prevents the seated person's back from leaning on the seatback. To do. When the headrest is raised to the use position, the seating prevention member can take an avoidance posture deviating from an interference position that interferes with the back of the seated person due to the variable structure. Therefore, the posture state of the headrest remains unchanged, and the seating prevention member does not give the seated person a foreign object feeling due to interference.

Next, according to a second aspect of the present invention, in the first aspect described above, when the headrest is in the retracted position, the seating prevention member is in the position of the interference position extending below the headrest, and the back of the seated person is the seat It has an abutment prevention structure that stops the movement of the back on the way.
According to the second aspect of the invention, the seating prevention member abuts against the back of the seat occupant at a position below the headrest by the structure extending below the headrest, and prevents the seat occupant from moving around.

Next, according to a third aspect, in the first or second aspect described above, the seating prevention member is formed of a resin material and is configured to be harder than the headrest.
According to the third aspect of the present invention, the seating prevention member is formed of a resin material so that the seating prevention member is relatively lightweight and can appropriately prevent the backrest movement of the seated person.

Next, according to a fourth aspect of the present invention, in any one of the first to third aspects of the invention described above, the seating prevention member is always a back portion of the seated person by the biasing force of the biasing member provided between the headrest and the seating prevention member. Is held at the interference position where it interferes. This seating prevention member is moved away from the position on the backrest surface of the seat back when the headrest is in the use position state, and is pushed to the seated person's back against the biasing force of the biasing member. Rotate to the position.
According to the fourth aspect of the present invention, the seating prevention member is always held in the interference position by the urging force of the urging member in the free state. Therefore, when the headrest is lowered from the use position to the storage position, the seating prevention member is returned to the interference position, so that the movement of the headrest to the storage position is smoothly performed.

Next, according to a fifth aspect, in any one of the first to fourth aspects described above, the seating prevention member avoids interference with the stay of the headrest when moving from the interference position toward the avoidance posture. It is formed in an avoidable shape.
According to the fifth aspect of the present invention, the seating prevention member can move while avoiding interference with the stay due to its avoidance shape. Thereby, the seating prevention member can be moved to the avoidance posture position that is further away from the interference position that interferes with the back of the seated person.

Next, according to a sixth invention, in any one of the first to fifth inventions described above, the headrest is formed in a reverse L-shape in a side view having a head receiving surface on an upper surface and a front surface thereof. . In the upper part of the seat back, a storage recess is formed that can store the headrest lowered to the storage position over the upper surface and the backrest surface. When the headrest is in the use position state, the seating prevention member provided to extend below the headrest is configured to be able to avoid and move in the space of the storage recess.
According to the sixth aspect of the present invention, the headrest having an inverted L shape is housed in the housing recess formed in the upper surface portion of the seat back in the retracted position state. When the headrest is in the use position state, the seating prevention member provided to extend below the headrest is in a state in which it can avoid and move in the space of the storage recess. Therefore, even if the seating prevention member is not raised to a position exceeding the height of the seatback, the seating prevention member can avoid and move backward.

The present invention can obtain the following effects by taking the above-described means.
First, according to the first aspect of the present invention, the seat restraining member capable of avoiding movement is provided on the headrest, so that when the headrest is in the retracted position, the seating restraining member can prevent seating. Then, when the headrest is in the use position state, the seating prevention member can be avoided and moved without changing the support mode of the head, so that a foreigner feeling due to interference with the seating prevention member can be prevented from being given to the seated person. .
Furthermore, according to the second invention, the seat blocking member extends below the headrest and has a contact blocking structure that prevents the seated person from moving back at a position below the headrest. The configuration of the invention can be embodied.
Furthermore, according to the third invention, since the seating preventing member is made of a resin material, the seating prevention member is relatively lightweight and can be configured to appropriately prevent the seated person from moving back.
Furthermore, according to the fourth aspect of the invention, by providing the urging member that urges the seating prevention member to the interference position, the movement of lowering the headrest from the use position to the storage position is smoothly prevented without being obstructed by the seating prevention member. Can be done.
Furthermore, according to the fifth invention, the seating prevention member is formed in an avoidance shape that can avoid interference with the stay during the avoidance movement, thereby preventing the seating prevention member from interfering with the back of the seated person. It is possible to move to a further avoidance posture position.
Furthermore, according to the sixth invention, the storage recess capable of storing the inverted L-shaped headrest is formed in the upper portion of the seat back, so that the headrest can be stored at a lower position with respect to the seat back. it can. When the headrest is brought into the use position, the seating prevention member can be avoided and moved backward in the space of the storage recess without raising the seating prevention member to a position exceeding the height of the seat back. Therefore, since the seating preventing member can be formed to extend long below the headrest, it is possible to favorably prevent the seated person from moving back on the position below the headrest.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

First, the structure of the sheet structure of Example 1 will be described with reference to FIGS.
This seat structure constitutes the vehicle seat 1 disposed as a rear seat of the vehicle. As shown in FIG. 1, the vehicle seat 1 includes a seat back 2 that serves as a backrest, a seat cushion 3 that serves as a seating portion, and a headrest 4 that serves as a headrest.
Here, the seat back 2 has a configuration in which lower end portions on both sides thereof are pivotally connected to rear end portions on both sides of the seat cushion 3 so as to be unlockable. As a result, as shown in FIG. 4, the seat back 2 can change its posture into a seating use position in a standing posture indicated by a virtual line and a forward position in a folded posture indicated by a solid line. It has a foldable structure.

Returning to FIG. 1, the above-described headrest 4 is assembled to the upper portion of the seat back 2 through two rod-like stays 4 </ b> S and 4 </ b> S serving as support columns so as to be vertically movable.
Specifically, the upper ends of the stays 4S and 4S are fixed to the headrest 4 by rigidly connecting them integrally. Then, as shown in FIG. 3, the stays 4S and 4S are inserted into the cylinders of the cylindrical supports 2S and 2S that are fixedly installed inside the shape of the seat back 2, as shown in FIG. The posture state with respect to the seat back 2 is maintained.

The stays 4S and 4S are inserted into the supports 2S and 2S so as to be movable in the insertion / removal direction. However, the stays 4S and 4S are respectively inserted into and removed from the supports 2S and 2S at the height position (insertion position) when the headrest 4 is in the storage position shown in FIG. 2 or the use position shown in FIG. The movement in the direction is locked so as to be releasable. Thereby, the headrest 4 can be adjusted in two steps in height between the storage position and the use position.
The use position of the headrest 4 shown in FIG. 3 described above is a height position at which the headrest Ph of the seated person P can be received by the headrest 4 at the rear side position. The storage position of the headrest 4 shown in FIG. 2 is a height position in which the headrest 4 is lowered to a position where the upper surface of the headrest 4 and the seat back 2 are flush with each other.

Here, the headrest 4 is formed in an inverted L-shaped bent plate shape having a head receiving surface on the upper surface and the front surface, as well shown in FIG. And the upper end part of each stay 4S and 4S mentioned above is penetrated by the lower surface side at the top-plate part 4R which makes the upper surface of this headrest 4, and is rigidly coupled integrally.
On the other hand, as shown in FIG. 1, the seat back 2 is formed with a storage recess 2 </ b> U having a shape that is partially recessed across the upper surface and the backrest surface (front surface) of the seat back 2. As shown in FIG. 2, the storage recess 2U has a configuration in which the top plate portion 4R of the inverted L-shaped headrest 4 lowered to the storage position can be stored inside the recess. Yes.

Therefore, in the storage position state of the headrest 4 in which the top plate portion 4R is stored in the storage recess 2U, the headrest 4 is stored in a state where the upper surface of the headrest 4 and the seat back 2 are flush with each other. At this time, the front plate portion 4H forming the front surface of the headrest 4 is placed on the backrest surface of the seat back 2. Thereby, the front plate portion 4H is arranged in a state in which a partial protrusion is formed with respect to the backrest surface shape of the seat back 2.
Returning to FIG. 1, the lower end of the front plate portion 4 </ b> H of the headrest 4 can be seated so that the back portion Pb of the seated person P can be prevented from leaning on the seat back 2 when the headrest 4 is in the retracted position. The blocking member 5 is connected.

The seating prevention member 5 is formed in a plate shape having the same width and thickness as the front plate portion 4H so that the shape thereof is a continuous shape from the front plate portion 4H. However, the seating prevention member 5 is formed in a shape in which the center portion on the tip side is tapered in a tapered shape in such a manner that the both sides are thinned toward the lower end portion on the tip side. Here, the tapered shape of the seating prevention member 5 corresponds to the avoidance shape of the present invention.
Here, as shown in FIG. 3, the seating prevention member 5 is pivotally connected to the lower end portion of the front plate portion 4 </ b> H on the back side by a hinge 6 so as to be rotatable. As a result, the seating prevention member 5 is located between the interference position that interferes with the back portion Pb of the seated person P indicated by the phantom line in the figure and the position of the avoidance posture that is rotated and moved to the rear side indicated by the solid line. You can change your posture. Here, the hinge 6 corresponds to the variable structure of the present invention.

Here, when the seating prevention member 5 moves toward the avoidance posture position, the seating prevention member 5 moves so as to avoid the interference with the stays 4S and 4S by the thin tapered shape. Can be done. Thereby, the seating prevention member 5 can be moved from the interference position where it interferes with the back portion Pb of the seated person P to a further avoidance posture position.
The seating prevention member 5 is normally urged to rotate in the clockwise direction in the figure by the urging force of the torsion spring 7 assembled at the location where the hinge 6 is disposed. As a result, the seating prevention member 5 is held at the interference position (virtual line position) rotated forward by the above urging force in the free state. Here, the torsion spring 7 corresponds to the biasing member of the present invention.

In a state in which the seating prevention member 5 is in the interference position, the seating prevention member 5 and the front plate portion 4H have a continuous shape relationship in which the front and rear surfaces of each other extend straight and in a straight line. It has become. The stopper structure in which the seating prevention member 5 is locked at the interference position is constituted by a contact structure in which the upper surface of the seating prevention member 5 and the lower surface of the front plate portion 4H are in surface contact.
Therefore, when the headrest 4 is lowered from the use position to the storage position in the free state, the seating prevention member 5 is always in the posture state in which it is returned to the interference position. Thereby, the movement of the headrest 4 to the storage position can be performed smoothly without being obstructed by the seating prevention member 5.

Then, as shown in FIG. 2, when the headrest 4 is lowered to the retracted position, the seating prevention member 5 is positioned on the backrest surface of the seatback 2, and the back portion Pb of the seated person P is placed on the seatback 2. The movement which drowns in is stopped.
Specifically, the seating prevention member 5 comes into contact with the waist portion Pw of the seated person P who is about to lean on the seat back 2 and stops the backrest movement. At this time, the seating prevention member 5 is supported by the backrest surface of the seat back 2 located behind the seatback preventing member 5 so that the backrest movement of the waist portion P of the seated person P can be fixed without rotating backward. It is possible to properly stop at the position.
Here, the seating prevention member 5 is formed of a resin material so that the support rigidity thereof is higher (harder) than the support rigidity of the headrest 4. As a result, the backrest movement of the waist Pw of the seated person P can be suitably prevented without being submerged into the seating prevention member 5.

In a state where the backrest movement of the seated person P is stopped by the seating preventing member 5, the seated person P can feel a foreign object feeling due to contact with the seating preventing member 5 on the back part Pb. At this time, the posture angle (torso angle) of the back portion Pb of the seated person P is usually raised more than the angle position (see FIG. 3) when the seating posture is about the seat back 2. The posture angle is changed. In the present embodiment, the arrangement and dimensions of the seating prevention member 5 are set so that the posture angle of the back portion Pb of the seated person P is raised 13 degrees forward compared to the angle in the normal seating posture. Is set.
Thus, when the headrest 4 is in the retracted position and the head Ph of the seated person P cannot be supported, the seated person P is prevented from moving back and the seated person P is in the vehicle. The seat 1 cannot be seated in a normal seating posture.

However, the seating blocking state by the seating blocking member 5 can be released by pulling up the headrest 4 to the use position shown in FIG. That is, when the headrest 4 is pulled up to the use position, the seating prevention member 5 is also moved upward. As a result, the seating prevention member 5 is pulled up to a height position that interferes with the vicinity of the shoulder portion of the seated person P who is leaning on the seatback 2, and the seated person P is allowed to move backrest to the seatback 2. It becomes a state to do.
Therefore, when the seated person P leans on the seat back 2 with the headrest 4 in the use position, the back part Pb of the seated person P interferes with the seating preventing member 5. As a result, the seating prevention member 5 is pushed by the back portion Pb of the seated person P and rotates backward against the urging force of the torsion spring 7 so that the seating person P does not feel a foreign object due to interference. It becomes a position state.

At this time, as shown in FIG. 3, the seating prevention member 5 is pulled up to a position where the space of the storage recess 2 </ b> U is disposed on the rear side, even if it is not raised to a position exceeding the height of the seatback 2. By doing so, it is possible to avoid the movement backward.
Accordingly, since the seating prevention member 5 can be formed in a shape extending long downward so as to come into contact with a position closer to the waist Pw of the seated person P, the backrest movement is prevented without increasing the plate thickness. It can be set as the structure which can be suitably performed. Then, since it is not necessary to increase the thickness of the seating prevention member 5, as shown in FIG. 4, when the seatback 2 is moved forward, the seatback 2 is seated without causing the seating prevention member 5 to become an obstacle. 3 can be suitably folded.

Then, the usage method of a present Example is demonstrated.
That is, as shown in FIG. 2, in the state where the headrest 4 is lowered to the retracted position, the movement of the seated person P leaning on the seat back 2 is caused by the seating prevention member 5 coming into contact with the waist Pw of the seated person P. Is prevented by. Accordingly, when the headrest 4 is in the retracted position, the seated person P cannot be seated in the normal seating posture on the vehicle seat 1.
Therefore, in order to cancel the seating blocking state by the seating blocking member 5, the headrest 4 is pulled up to the use position shown in FIG. As a result, the seated person P can sit on the vehicle seat 1 in a normal seating posture. Then, when the seated person P sits on the vehicle seat 1 and leans on the seat back 2, the seating preventing member 5 is pushed away by the back part Pb of the seated person P, and the interference position indicated by the phantom line in FIG. To the position of the avoidance posture indicated by the solid line. At this time, since the posture state of the headrest 4 does not change in the use position, the head Ph can be supported without changing the support mode of the head Ph of the seated person P.
Then, when the seated person P leaves the vehicle seat 1, the seating prevention member 5 described above is rotationally moved forward by the urging of the torsion spring 7 and returned to the interference position. Therefore, by lowering the height position of the headrest 4 in this state, the headrest 4 can be smoothly lowered to the retracted position without being obstructed by the seating prevention member 5.

Thus, according to the seat structure of the present embodiment, the seat restraining member 5 capable of avoiding movement is provided on the headrest 4 so that the seat restraining member 5 can be seated when the headrest 4 is in the retracted position. Can be prevented. Then, when the headrest 4 is in the use position state, the seating prevention member 5 is avoided and moved without changing the support mode of the head Ph so as not to give the seated person P a foreign object feeling due to interference with the seating prevention member 5. Can be.
Furthermore, since the seating prevention member 5 is made of a resin material, the seating prevention member 5 can be configured to be relatively lightweight and to prevent the seated person P from moving back.
Further, by providing the torsion spring 7 that urges the seating prevention member 5 to the interference position, the movement of lowering the headrest 4 from the use position to the storage position can be performed smoothly without being obstructed by the seating prevention member 5. it can.
Furthermore, the seating prevention member 5 is formed in a tapered avoidance shape that can avoid interference with the stays 4S and 4S during the avoidance movement, so that the seating prevention member 5 and the back portion Pb of the seated person P can be avoided. It is possible to move to an avoidance posture position that is further away from the interference position where the interference occurs.
Furthermore, by forming the storage recess 2U capable of storing the inverted L-shaped headrest 4 at the upper portion of the seat back 2, the headrest 4 can be stored at a lower position with respect to the seat back 2. Then, when the headrest 4 is in the use position, the seating prevention member 5 is moved backward in the space of the housing recess 2U without raising the seating prevention member 5 to a position exceeding the height of the seat back 2. Can be made. Therefore, since the seating prevention member 5 can be formed to extend long below the headrest 4, the backrest movement of the seated person P can be suitably stopped at the position below the headrest 4.

Although the embodiment of the present invention has been described with respect to one example, the present invention can be implemented in various forms in addition to the above-described example.
For example, as shown in FIG. 5, the seating prevention member can be moved by avoiding the sliding movement to the rear side instead of the rotational movement as shown in the above embodiment. Further, the avoidance movement of the seating prevention member is not limited to the backward movement, but may be performed by movement in another direction such as a side.
Further, if the seating prevention member is provided with a variable structure such as the hinge shown in the above embodiment between the headrest and the movement to the avoidance posture position is possible, the thickness of the seating prevention member is increased. It is also possible. Therefore, by increasing the thickness of the seating prevention member, it is possible to prevent seating by raising the posture angle of the back of the seated person more forward.
In addition, the seating prevention member may be formed of a metal part. In this case, however, the seating prevention member can be made hard, but the weight may be increased.
Moreover, the avoidance shape which can avoid interference with the stay of a seating prevention member is not limited to the taper shape shown in the said Example. For example, the avoidance shape can also be formed by providing the seating prevention member with a slit that can avoid interference with the stay.

1 is a perspective view illustrating a schematic configuration of a sheet structure of Example 1. FIG. It is a side view showing the state where the headrest was made into the storage position. It is a side view showing the state by which the headrest was made into the use position. It is the side view showing the state where the seat back was brought forward and it was made into the folding posture. It is a side view showing the variable structure of the seating prevention member as a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2S Support 2U Storage recessed part 3 Seat cushion 4 Headrest 4R Top plate part 4H Front plate part 4S Stay 5 Seating prevention member 6 Hinge (variable structure)
7 Torsion spring (biasing member)
P seated person Ph head Pb back Pw waist

Claims (5)

A seat structure having a seat back as a seat back and a headrest as a headrest,
The headrest is assembled to the upper part of the seat back via a stay as a support so that the headrest can be moved up and down, and the use position and the use position where the head of the seated person can be received at the position on the rear side. It is possible to move between the storage position deviated downward from the
The headrest is connected to a seating prevention member that is positioned on the backrest surface of the seatback when the seatrest is in the retracted position and can prevent the seated person's back from leaning on the seatback.
The seating prevention member is connected to the headrest so that it can take an avoidance posture that deviates from an interference position that interferes with the back of the seated person when the headrest is in a use position state by a variable structure that makes the posture relative to the headrest variable. And
The seat structure is characterized in that the seating prevention member is formed of a resin material harder than the headrest . The seat structure according to claim 1,
When the headrest is in the retracted position, the seating blocking member has a contact blocking structure in which the back of the seated person sits on the seat back in the interference position that extends downward from the headrest. A sheet structure characterized by that. The seat structure according to claim 1 or 2,
The seating prevention member is normally held at an interference position that interferes with the back of the seated person by the biasing force of the biasing member provided between the headrest and the headrest is in the use position state by sheet structure characterized that you rotational movement to the position of aversion by out from a position on the backrest surface of the seat back is pushed to the back of the seated person against the biasing force of the biasing member. The seat structure according to any one of claims 1 to 3,
The seating blocking member, the sheet structure characterized that you have been formed to avoid the shape capable of avoiding interference with the stay of the headrest when moving towards the aversion from the interference position. The seat structure according to any one of claims 1 to 4,
The headrest is formed in a reverse L-shaped shape in side view having a head receiving surface on the upper surface and the front surface thereof,
The upper portion of the seat back is formed with a storage recess capable of storing therein the headrest lowered to the storage position across the upper surface and the backrest surface, and the headrest is in the use position state. A seat structure characterized in that the seating prevention member, which sometimes extends below the headrest, is configured to be able to avoid and move in the space of the storage recess .

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