JP6284273B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat that can correct a seating posture of a seat belt wearer and cope with a submarine phenomenon.

As a seat belt, a three-point holding type (three-point seat belt) that holds a seat occupant at three positions of either the left or right shoulder of the seat occupant and the waist on the left and right is widely used for vehicle seats and the like.
If the seated person wears a three-point seat belt, the upper half webbing (shoulder webbing) is passed from the shoulder of the seated person to the seated person, and the lower half webbing (wrapped webbing) The seated person is restrained by the seat.

  In an emergency such as a frontal collision of the vehicle, sudden deceleration, or sudden stop, an inertial force that moves the seated person forward acts on the seated person. For this reason, a seat belt (for example, a buckle) is pulled by a pretensioner (for example, a buckle pretensioner) in an emergency, the seat belt is tightened without causing the seat belt to sag, and a seated person is restrained to the seat. There is known a configuration that prevents a seated person from moving forward due to the inertial force (for example, Japanese Unexamined Patent Application Publication No. 2009-173103).

  In a vehicle seat, when sitting for a long time, due to fatigue or vibration on the seat, the pelvis of the seated person tilts backward, causing a front slip, and sits before the seating position where the seat back is seated deeply, There is a possibility of so-called “sitting”. If you are seated in a state of sitting, even if you are wearing a seat belt, the butt slip phenomenon, the so-called submarine phenomenon, where the butt of the seated person moves forward while sinking into the seat cushion due to the inertial force in an emergency On the other hand, it has been pointed out that the seat belt cannot sufficiently exhibit restraint performance and may not function effectively.

  Japanese Patent Application Laid-Open No. 2007-210351 discloses a seat that moves the seat cushion rearward and swings the seat cushion so that the front end is lifted and the rear end sinks. In this seat, the seat cushion includes a cushion frame and a cushion seat that can move backward and swing relative to the seat frame. When the pretensioner is activated in an emergency, the cushion seat moves backward with respect to the seat frame while leaving the seat back in its original position, and swings so that the front end is lifted and the rear end sinks. It has become.

There is also known a seat that corrects the sitting posture of a seated stool by moving a seated stool in a sitting state backward.
A seat that has a sensor (pressure sensor) for detecting the seated person's pressure and detects the seated person's shallow sitting from the pressure distribution is a seat that drives the seat slide device to move the seat cushion backward. It is described in the publication. In this seat, the seat cushion is arranged on a seat slide device that can move relative to the seat back, and when the sensor detects a seated position, the seat slide mechanism is driven and the seat cushion moves backward. Is done.

As is well known, a seat cushion and a seat back of a seat are formed by placing a seat pad made of a foam molding material such as urethane foam on a frame serving as a skeleton and covering the seat pad with a breathable trim cover.
Japanese Patent Application Laid-Open No. 2008-018801 discloses a seat that pulls the trim cover backward instead of moving the seat cushion backward. In this seat, the trim cover of the seat cushion is pulled backward, and the seated person is moved backward together with the seat cover to correct the sitting posture. Here, the rear end of the trim cover is fixed to the take-up shaft via a tension roller, and the take-up shaft can be rotated under the driving force of the motor. When an emergency such as sudden deceleration, sudden stop, or front collision of the vehicle is detected or predicted, the motor is driven, the winding shaft rotates, the rear end of the trim cover is wound around the winding shaft, and the trim cover is It is pulled backwards.

JP 2009-173103 A JP 2007-210351 A Japanese Utility Model Publication No. 03-019355 JP 2008-018801 A

  In the seat described in JP 2009-173103 A, the pretensioner is driven in an emergency, and the seat belt is tightened without causing slack. However, if the seated person is seated in a shallow state, even if the seat belt is tightened to eliminate the slack of the seat belt, the seat belt cannot sufficiently exert the restraining performance against the submarine phenomenon and does not function effectively. The fear cannot be wiped out.

  In the seat described in Japanese Patent Application Laid-Open No. 2007-210351, the seat belt is tightened without causing slack, the seat cushion seat is moved backward, and the seat cushion seat is swung so that the front end is lifted. Yes. Therefore, even when seated in a sitting state, the seat belt can sufficiently exhibit restraint performance against the submarine phenomenon and functions effectively.

  Further, the seat described in Japanese Utility Model Laid-Open No. 03-019345 is disposed on a seat slide mechanism that is movable relative to the seat back, and when the sensor detects a forward slip, the seat slide mechanism is driven. The seat cushion is moved backward. For this reason, even if sitting in a shallow sitting state, the seating position is set to be seated deeply on the seat back side, the sitting posture is corrected, and the seat belt can sufficiently exhibit the restraining performance against the submarine phenomenon and functions effectively.

  Further, in the seat disclosed in Japanese Patent Application Laid-Open No. 2008-018801, if the rear end of the trim cover is pulled backward, the seat occupant moves rearward together with the trim cover. Is corrected. Therefore, the seat belt can sufficiently exhibit the restraining performance against the submarine phenomenon and functions effectively.

  However, in the configuration in which the seat cushion itself is moved backward as described in Japanese Patent Application Laid-Open No. 2007-210351 and Japanese Utility Model Laid-Open No. 03-019345, the configuration for correcting the sitting posture tends to increase. On the other hand, as described in Japanese Patent Application Laid-Open No. 2008-018801, the configuration of the seat that pulls the trim cover and moves the occupant backward together with the trim cover can be reduced in size.

  Here, in the sheet described in Japanese Patent Application Laid-Open No. 2008-018801, the rear end of the trim cover is fixed to the winding shaft. However, in order to increase the tension by pulling the trim cover to which the rear end is fixed rearward, it is also necessary to fix the front end of the trim cover. And if the front end of the trim cover is fixed, the rear end of the trim cover can only be pulled backwards within the range of slack and extension of the trim cover, the trim cover pulling distance is small, and the trim cover pulling is limited Is done. Therefore, the seated person may not be moved rearward together with the trim cover by a distance that corrects the sitting posture in the sitting state and sits deeply on the seat back side.

  The present invention relates to a vehicle seat in which the trim cover is pulled backward without limiting the distance, the seating posture of the seated person is corrected, and the seat belt can sufficiently exert the restraining performance against the submarine phenomenon. The purpose is to provide.

In the present invention, the trim cover of the seat cushion is wound around the seat pad in the front-rear direction, and can be pulled on the seat pad without being limited in distance.
In other words, according to the first aspect of the present invention, the seat pad is provided on the frame serving as the skeleton, the seat cushion is formed by covering the seat pad with the trim cover, and the seat back is restrained by the seat belt. In the vehicle seat, the trim cover of the seat cushion is separated from the left and right side portions, and has a belt-like central piece wound around the seat pad in the front-rear direction, the belt-like central piece of the trim cover, the seat It is placed between the pads to isolate the strip-shaped central strip of the trim cover from the seat pad, and is connected to the strip-shaped central strip of the trim cover and the isolated skin that allows the strip central strip of the trim cover to slide on the seat pad When driven, the upper surface of the strip cover center piece of the trim cover by sliding the strip cover center piece on the seat pad through the isolation skin It is provided with a traction means for pulling backwards.
According to the fourth aspect of the present invention, the seat pad is provided on the frame serving as the skeleton, the seat cushion is formed by covering the seat pad with the trim cover, and the seat back is restrained. In the vehicle seat, the trim cover of the seat cushion is separated from the left and right side portions, and has a belt-like central piece wound around the seat pad in the front-rear direction, and the trim cover on the seat pad The belt-like central piece can be slid, connected to the belt-like central piece of the trim cover, and when driven, the belt-like central piece of the trim cover slides on the seat pad to pull the upper surface of the belt-like central piece of the trim cover backward And traction means.

  In the present invention according to claims 1 and 4, the belt-like central piece of the trim cover of the seat cushion is isolated by the isolation skin and wound around the seat pad, or is slidable. Under the drive of the means, it is pulled backwards without limiting the distance. Therefore, the seated person can be quickly moved backward, and the sitting posture in the sitting state can be easily corrected. When the seating posture is corrected and seated deeply on the seat back side, the seat belt can sufficiently exhibit the restraining performance against the submarine phenomenon and function effectively.

1 is a schematic perspective view of a vehicle seat according to one embodiment (first embodiment) of the present invention. (A) is a plan view of a seat cushion in one embodiment (Example 1) of the present invention separated from a seat, and (B-1) to (B-3) have an isolated skin, 1) to (C-3) are schematic views of specific examples in which the traction means in one embodiment (Example 1) of the present invention is different when no isolated skin is interposed. The schematic block diagram of the control system of a vehicle seat is shown. Fig. 2 shows a side view of a seat cushion comprising traction means with a pretensioner. Fig. 4 shows a bottom view of a seat cushion comprising traction means with a pretensioner. The side view of the seat cushion which comprises the traction means provided with the solenoid and the tension coil spring is shown. The bottom view of the seat cushion which comprises the traction means provided with the solenoid and the tension coil spring is shown. The side view of the partial fracture | rupture of the seat cushion which comprises the traction means provided with the solenoid and the tension coil spring is shown. The side view of the traction means provided with the motor and the drive roller is shown. (A) is a plan view of a seat cushion in another embodiment (Example 2) of the present invention separated from the seat, (B) is a case where an isolated skin is interposed, and (C) is a case where no isolated skin is interposed. The schematic diagram of each is shown. (A) is a plan view of a seat cushion in another embodiment of the present invention (Example 3) separated from the seat, (B) when an isolated skin is interposed, (C) when no isolated skin is interposed The schematic diagram is shown respectively.

  In a vehicle seat that includes a seat cushion, a seat back formed by covering a seat pad with a trim cover and covering the seat pad with a trim cover, and restraining a seated person with a seat belt, the trim cover of the seat cushion is: It has a strip-shaped central piece that is separated from the left and right sides and wound around the seat pad in the front-rear direction. The seat is arranged between the strip-shaped central piece of the trim cover and the seat pad to isolate the strip-shaped central piece of the trim cover from the seat pad, and allows the strip-shaped central piece of the trim cover to slide on the seat pad. When connected to the isolated skin and the strip-shaped central strip of the trim cover, when driven, the central strip of the trim cover is slid on the seat pad through the isolated skin and the upper surface of the central strip of the trim cover is pulled backward. And traction means.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view of a vehicle seat according to one embodiment (first embodiment) of the present invention. 2A is a plan view of the seat cushion in one embodiment (Example 1) of the present invention separated from the seat, and (B-1) to (B-3) are cases where an isolated skin is interposed. , (C-1) to (C-3) are schematic views of specific examples in which the traction means in one embodiment (Example 1) of the present invention is different when no isolated skin is interposed.
The front and rear directions refer to the directions viewed from the driver seated on the driver seat, and are appropriately indicated by Fr and Rr. The left-right direction refers to a direction orthogonal to the front-rear direction.

  As shown in FIG. 1, the vehicle seat 10 includes a seat cushion 12 and a seat back 14 provided at the rear end of the seat cushion, and a headrest 14h is provided at the upper end of the seat back. . A seat belt 15, for example, a three-point seat belt is mounted on the seat 10, and a seated person is restrained by the seat belt. Reference numeral 12s denotes a bank portion (swelled portion; left and right side portions) on the side portion of the seat cushion.

The basic structures of the seat cushion 12 and the seat back 14 are well known. For example, as shown in FIGS. 2 (A), (B-1), and (C-1), the seat cushion is seated on a seat frame 12f serving as a skeleton. The pad (cushion member) 12p is placed and the seat pad is covered with a trim cover (skin) 12c. For example, a substantially rectangular spring assembly 12f ′ made of an S spring is constructed between the left and right side frames of the seat frame to form a part of the seat frame, and a seat pad is placed on the spring assembly. The seat back 14 has the same configuration.
Since the three-point seat belt (seat belt) 15 is a well-known one and is not a main part of the present invention, its details are omitted.

  The seat cushion trim cover 12c has a central piece 12c 'separated from the left and right side portions 12s of the seat cushion, and the central piece is formed in a belt-like shape wound around the seat pad 12p in the front-rear direction. Yes. As shown in FIGS. 2 (B-1) to (B-3), the isolation skin 16 is disposed between the strip-shaped center piece (strip-shaped center piece) 12c ′ of the trim cover and the seat pad 12p, and its front end 16f. The rear end 16r is fixed. In the embodiment, the front end 16f of the isolation skin is fixed to the lower surface of the seat pad 12p, and the rear end 16r is fixed to the lower surface of the spring assembly 12f '. However, the configuration for fixing the front end and the rear end is not limited to this.

The isolation skin 16 isolates the strip-shaped central piece 12c ′ of the trim cover from the seat pad 12p, and allows the strip-shaped central piece to slide on the seat pad through the isolation skin. The isolation skin 16 is formed from a cloth material having a low frictional resistance, for example, a cloth material having a smooth surface on the surface (upper surface) contacting the strip-shaped central piece of the trim cover. The isolation skin 16 may be formed from a cloth material in which a friction reducing agent such as silicon spray or a powder lubricant is applied or infiltrated on the surface of the trim cover that is in contact with the strip-shaped central piece 12c ′.
Since the strip-shaped central piece 12c ′ is isolated from the seat pad 12p by the isolation skin 16, when the strip-shaped central piece is pulled, the strip-shaped central piece is slid (moved) on the seat pad. On the other hand, since the front end 16f and the rear end 16r of the isolation skin are fixed, the isolation skin 16 cannot move and does not slide integrally with the strip-shaped central piece of the trim cover on the seat pad.

  Further, a friction reducing agent such as silicon spray may be applied or infiltrated into the surface of the seat pad 12p in contact with the strip-shaped central piece 12c 'of the trim cover. In this case, as shown in FIGS. 2C-1 to 2C-3, the isolation skin 16 is omitted, and the strip-shaped central piece 12c ′ of the trim cover slides on the seat pad without passing through the isolation skin. .

FIG. 3 shows a schematic block diagram of a control system for a vehicle seat.
As shown in FIG. 3, the seat 10 includes traction means 20, pressure detection means 22, collision detection means 24, collision detection means 26, and central control means 28.
The traction means 20 includes, for example, (1) a pretensioner, (2) a solenoid, a tension coil spring, (3) a motor, a driving roller, and the like. The piece 12c ′ is pulled.

2 (B-1) to (B-3) with the isolation skin 16 interposed, and FIGS. 2 (C-1) to (C-3) with the isolation skin omitted, the traction means 20 are different. .
That is, in FIGS. 2 (B-1) and (C-1), the pretensioner is used as the traction means, and in FIGS. 2 (B-2) and (C-2), the combination of the solenoid and the tension coil spring is used as the traction means. B-3) In (C-3), the combination of the motor and the driving roller is used as the traction means. Details of the traction means including a pretensioner will be described later.

For example, as shown in FIG. 2A, the pressure detection means 22 is composed of a series of pressure sensors distributed on the front and rear, left and right and arranged on the seat pad 12p, and detects the pressure distribution of the seated person applied to the seat pad. To do.
The collision detection unit 24 includes, for example, an acceleration sensor provided on the front portion of the vehicle such as a front grille of the vehicle and a seat back, and detects an emergency such as a frontal collision, sudden deceleration, or sudden stop of the vehicle from a change in acceleration.
The collision detection means 26 is composed of, for example, an optical sensor provided at the front of the vehicle such as a front grille, and measures a distance from a front obstacle (including a preceding vehicle) with a laser beam and collides with a front obstacle. Predict the danger of.

The central control means 28 is an ECU (Engine Control Unit) composed of, for example, a CPU (Central Processing Unit), an MPU (Micro Processing Unit), and the like. The traction means 20, the pressure detection means 22, the collision detection means 24, The operation of the collision detection means 26 is controlled.
For example, data (pressure data, acceleration data, distance data) detected and measured by a pressure sensor (pressure detection means) 22, an acceleration sensor (collision detection means) 24, and an optical sensor (collision detection means) 26 are stored in the central control means 28. Is output. Then, when the central control means 28 recognizes and recognizes a shallow seat from the pressure data, an emergency situation such as a frontal collision, a sudden deceleration, and a sudden stop of the vehicle from the acceleration data, and the danger of a collision with a front obstacle from the distance data, Perform the corresponding control immediately. That is, the central control means 28 drives the pulling means 20, pulls the strip-shaped central piece 12c ′ of the trim cover backward, moves the seated person back to the seating position where he sat deeply on the seat back side, and sat down. Correct the sitting posture of the condition.

(1) The pretensioner, (2) the solenoid, the tension coil spring, (3) the traction means including the motor and the driving roller will be described below.
4 and 5 show a side view and a bottom view, respectively, of a seat cushion having a traction means equipped with a pretensioner.

  In the embodiment, the seat 10 is stacked on the seat slide device 122 and is slidable in the front-rear direction, and the connecting rod 122b is installed on the left and right movable rails 122a of the seat slide device. And the traction means 20-1 provided with the pretensioner 120 is attached to the connecting rod along the connecting rod 122b. Reference numeral 122c indicates a fixed rail of the seat slide device.

  The configuration of the pretensioner 120 is known, and its basic configuration will be briefly described. A high-pressure gas is generated by an inflator, the high-pressure gas is supplied to the cylinder, the piston is drawn into the cylinder, and the wire connected to the piston It is configured to pull 120a. In the embodiment, the pretensioner wire 120a is connected to the strip-shaped central piece 12c 'of the trim cover on the back side of the seat cushion 12. Therefore, when the pretensioner 120 is driven and the wire 120a is pulled, the upper surface of the band-shaped central piece 12c ′ is pulled backward as shown by arrows (FIGS. 2B-1 and 2C-1 and FIG. 4). reference).

A configuration for connecting the pretensioner wire 120a to the strip-shaped central piece 12c ′ of the trim cover will be described in detail below with reference to FIGS.
In the embodiment, the front and rear ends 12c′-fe and 12c′-re of the strip-shaped central piece 12c ′ of the trim cover are connected to the wire 120a of the pretensioner via the connecting plate 30.
For example, the connecting plate 30 has an asymmetrical chevron shape having a top portion on the front side and a flange portion on the rear side, and the top portion is shifted to the left and right sides. It is formed larger than the width. Of course, the connection plate 30 may be formed in a mountain shape that is not asymmetrical and symmetrical in the left-right direction, or may have a shape other than the mountain shape.

  A long groove 30a in the left-right direction that is longer than the width of the strip-shaped central piece 12c 'is formed in the flange portion of the connecting plate 30, and the rear end 12c'-re of the strip-shaped central piece is inserted through the long groove 30a of the connecting plate and folded back. The overlapping portions are stitched together. Further, the plurality of hooks 30b are attached to the front end 12c′-fe of the belt-shaped central piece and locked to the long groove 30a, whereby the front and rear ends of the belt-shaped central piece are connected via the connecting plate 30, A strip-shaped central piece 12c 'is formed.

A connector 120b with a hole is attached to the tip of the wire 120a of the pretensioner. Further, a locking hole 30c is formed at the top of the connecting plate 30, and a connecting piece 120c, for example, a tie wrap is inserted through the hole of the connecting tool and the locking hole of the connecting plate, so that the pretensioner wire 120a and the belt-like central piece 12c are formed. 'Is connected via a connecting plate.
Of course, the connecting piece 120c for connecting the wire 120a of the pretensioner and the strip-shaped central piece 12c ′ is not limited to the tie wrap.

  In FIG. 4, reference numeral 16a indicates a hook attached to the rear end 16r of the isolated skin, and the rear end of the isolated skin is fixed to the spring assembly by locking the hook to the spring assembly 12f ′. ing.

  From the pressure data detected by the pressure sensor 22, the seat control and the central control means 28 recognize, and further, from the data (acceleration data, distance data) detected and measured by the acceleration sensor 24 and the optical sensor 26, the front collision of the vehicle, the sudden When recognizing an emergency situation such as deceleration, sudden stop, or danger of collision with a front obstacle, the central control means drives the pretensioner 20-1.

  When the pretensioner 120 is driven, the inflator is activated and high pressure gas is generated to pull the wire 120a. When the pretensioner wire 120a is pulled, the upper surface of the strip-shaped central piece 12c 'is pulled backward under a strong tensile force (traction force). When the upper surface of the belt-shaped central piece 12c 'is pulled backward, the seated person who sits on the seat cushion 12 on the belt-shaped central piece moves backward as the belt-shaped central piece is pulled.

As described above, the belt-shaped central piece 12c ′ of the seat cushion trim cover is isolated by the isolation skin 16 and wound around the seat pad 12p as shown in FIG. 2 (B-1). The pretensioner 120 is smoothly pulled backward without limiting the distance.
Alternatively, as shown in FIG. 2 (C-1), the belt-shaped central piece is wound around the seat pad 12p coated with or penetrating a friction reducing agent on the surface facing the belt-shaped central piece 12c ′ of the trim cover. Therefore, it is pulled backward smoothly without limiting the distance.

  Therefore, the seated person can be quickly moved backward until he / she sits at a position deeply seated on the seat back side, and the sitting position in the shallow sitting state is easily corrected. Then, the seat belt 15 is satisfactorily seated on the seat back side after the seating posture is corrected, and the seat belt 15 effectively functions with sufficient restraint performance against the submarine phenomenon.

The seated person who sinks in the seat cushion 12 by his / her own weight is lifted by the strip-shaped central piece 12c ′ of the trim cover which is pulled and increased in tension, and moves backward.
In particular, in the configuration in which the pretensioner 120 is the traction means 20-1, a strong traction force is applied to the strip-shaped central piece 12c ′ by driving the pretensioner, and a large tension acts on the strip-shaped central piece 12c ′. Therefore, even a heavy seated person can be lifted from the sinked state and smoothly moved backward.

In the embodiment, the front and rear ends 12c′-fe and 12c′-re of the strip-shaped central piece 12c ′ are connected via the long groove 30a of the connecting plate longer than the width of the strip-shaped central piece 12c ′. Further, the wire 120a of the pretensioner and the strip-shaped central piece 12c ′ are connected via the connecting plate 30. Therefore, when the pretensioner 20-1 is driven and the wire 120a is pulled, the belt-like central piece 12c ′ is pulled under uniform tension in the width direction, and the seated person moves deeply from the seated position of the shallow seat to the toeback side. It moves smoothly to the seated position.
Further, since the trim cover 12c (to be precise, the belt-like central piece 12c ′ of the trim cover) is merely pulled, the configuration for correcting the sitting posture can be reduced in size.

  6, 7, and 8 show a side view, a bottom view, and a partially broken side view of a seat cushion having a pulling means including a solenoid and a tension coil spring, respectively. 6 and 7, the tension coil spring is held in the extended state, and in FIG. 8, the extension state is released and the tension coil spring is degenerated.

In a seat cushion having a traction means including a solenoid and a tension coil spring, members common to the seat cushion having a pretensioner as a traction means are denoted by the same reference numerals, description thereof is omitted, and different configurations are mainly described. To do.
In the embodiment in which the combination of the solenoid 222 and the tension coil spring 224 is the traction means 20-2, the tension coil spring is installed in an extended state between the strip-shaped central piece 12c ′ of the trim cover and the connecting lot 122b of the seat slide device. The belt-shaped central piece can be pulled under the restriction of the solenoid.

That is, the hole 120b′-1 of the connector 120b ′ is formed larger than the hole of the connector 120b so that the solenoid plunger 222a is inserted.
The solenoid 222 is attached to the lower surface of the seat frame 12f on the back side of the seat cushion 12. The solenoid 222 incorporates a spring, and the biasing force of the solenoid 222 protrudes from the solenoid 222. The solenoid 222 is inserted into the hole 120b′-1 of the connector, and is locked to the hole of the connector, that is, the connector 120b ′. . In addition, the tension coil spring 224 is pulled and sufficiently stretched to generate a tensile force, and one end of the tension coil spring 224 is opposite to the connection piece 120c on the side of the connection hole 120b′-1, that is, the connection tool 120b ′. The other end is locked to a connecting rod 122b between the left and right movable rails 122a. Needless to say, since both ends of the tension coil spring 224 are hook-shaped, they can be easily locked to the connecting tool 120b ′ and the connecting rod 122b.
In addition, in FIG. 7, since the hole shape of connecting tool 120b 'is hidden, the connecting tool is taken out and the hole shape of the connecting tool is clarified as shown by an arrow.

For example, the extended tension coil spring 224 is set as follows.
First, one end of the tension coil spring 224 is locked to the connecting rod 122b, and the plunger 222a is inserted through the hole 120b′-1 of the connecting tool. Then, if the tension coil spring is pulled and stretched, the other end is inserted through the hole 120b'-1 of the connector, whereby the tension coil spring 224 in the stretched state is set.
6 and 7, the plunger 222a of the solenoid is inserted through the hole 120b'-1 of the connector, and the tension coil spring 224 is held in the extended state.

  As described above, since the plunger 222a is projected by the biasing force of the spring built in the solenoid, the plunger 222a is inserted into the hole 120b′-1 of the connector against the tensile force of the tension coil spring 224. Is maintained and there is no risk of being pushed back.

  When the central control means 28 recognizes that the seated person is in a sitting state, and further recognizes an emergency situation such as a frontal collision of the vehicle, a sudden deceleration, a sudden stop, or a collision with a front obstacle, the central control means An energization signal is output to the solenoid 222, the solenoid is energized in response to the signal, and the plunger 222a is attracted from its protruding position against the biasing force of the spring under the generated magnetic force.

  When sucked from the protruding position, the plunger 222a comes out of the hole 120b'-1 of the connector and is detached. Then, the tension coil spring 224 is contracted as shown by an arrow in FIG. 8, and the tensile force acts on the connecting plate 30 via the connecting tool 120b ′ to pull the strip-shaped central piece 12c ′ of the trim cover, thereby The upper surface of the piece is pulled backward as indicated by arrows in FIGS. 2 (B-2) and (C-2) and FIG.

A structure (see FIG. 2B-2) in which the isolation skin 16 is interposed between the strip-shaped central piece 12c ′ of the trim cover and the seat pad 12p (see FIG. 2 (B-2)), and a friction reducing agent is applied or penetrated on the surface of the seat pad. In any configuration in which the isolated skin is omitted (see FIG. 2C-2), the belt-like central piece is smoothly pulled backward without limiting the distance.
Therefore, in any configuration, the belt-like central piece 12c ′ that has been pulled and increased in tension has moved up to a position where the seated person is lifted from a state where it is sunk under its own weight and seated at a position where it is seated deeply on the seat back side, The sitting posture in the sitting state is corrected. Therefore, the seat belt 15 functions effectively by sufficiently exhibiting the restraining performance against the submarine phenomenon.

  In the configuration in which the combination of the solenoid 222 and the tension coil spring 224 is the traction means 20-2, the extension state of the tension coil spring is set again by inserting the plunger 222a protruding from the solenoid into the hole 120b'-1 of the connector. The traction means can be used repeatedly.

Here, the solenoid 222 restricts the tension coil spring 224 to restrict the pulling of the belt-shaped central piece 12c ′ by the tension coil spring, and functions as a regulating member. However, the restricting member normally restrains the tension coil spring 224 to restrict the pulling of the belt-shaped central piece 12c ′, and in the emergency that recognizes the emergency situation of the vehicle in addition to the sitting state, It is sufficient that the restraint is released and the belt-shaped central piece can be pulled, and the invention is not limited to the solenoid.
For example, instead of projecting the plunger 222a of the solenoid 222, the piston may be projected from the cylinder to restrict the pulling of the belt-shaped central piece 12c ′. That is, when the piston is protruded from the cylinder by hydraulic pressure, pneumatic pressure, or the like, inserted into the hole 120b'-1 of the connector and restrained by the tension coil spring 224, the state of shallow sitting, vehicle emergency, etc. is recognized. It is good also as a structure which makes it detach | leave from the hole of a connector.
However, if the solenoid 222 is used as a restricting member, the configuration can be simplified and reduced in size as compared with the configuration in which the piston is protruded by hydraulic pressure, pneumatic pressure, or the like.

FIG. 9 shows a side view of the traction means provided with a motor and a drive roller.
The traction means 20-3 including the motor 322 and the driving roller 324 is also disposed on the back side of the seat cushion 12. The motor 322 has a built-in speed reduction mechanism, a drive roller 324 is fixed to the motor shaft 322a, and a high torque driving force decelerated by the speed reduction mechanism is output to the drive roller. The driving roller 324 is pressed against and contacts the back surface of the strip-shaped central piece 12c ′ of the trim cover on the back side of the seat cushion 12. For example, the drive roller 324 is aligned with the center in the left-right direction of the strip-shaped central piece 12c ′.

In the traction means 20-3 that combines the motor and the driving roller, it is recognized that the seated person is in a sitting state, and further, an emergency such as a frontal collision of the vehicle, a sudden deceleration, a sudden stop, or a collision with a front obstacle. Is recognized, the motor 322 is driven under the control of the central control means 28, and the drive roller 324 is driven to rotate.
As shown in FIGS. 2 (B-3) and (C-3), when the driving roller 324 is rotated in the clockwise direction, the upper surface of the belt-like central piece is caused by the frictional force between the driving roller and the belt-like central piece 12c ' Pulled backwards as seen.

As shown in FIG. 2 (B-3), the strip-shaped central piece 12c ′ of the seat cushion trim cover is isolated by the isolation skin 16 and wound around the seat pad 12p. Under the rotational drive, it is smoothly pulled backward without limiting the distance.
Alternatively, as shown in FIG. 2 (C-3), the belt-shaped central piece is wound around the seat pad 12p coated with or penetrating a friction reducing agent on the surface facing the belt-shaped central piece 12c ′ of the trim cover. Therefore, it is pulled backward smoothly without limiting the distance.

  Therefore, the belt-like central piece 12c ′ pulled rearward and increased in tension is lifted from the state of sinking under its own weight and moved to a position where it is seated deeply on the seat back side, and is in a sitting state. The sitting posture is corrected. Therefore, the seat belt 15 functions effectively by sufficiently exhibiting the restraining performance against the submarine phenomenon.

  In the pulling means 20-3 in which the motor and the driving roller are combined, the front and rear ends of the strip-shaped central piece 12c ′ may be connected by the connecting plate 30 or may be directly stitched and connected without using the connecting plate. Good. However, if the connection plate 30 is connected, the band-shaped central piece 12c ′ is less likely to be wrinkled in the portion adjacent to the connection plate, and the belt-shaped central piece can be pulled smoothly under the pressure of the driving roller 324. .

In the traction means 20-1 having the pretensioner 120, the solenoid 222, and the traction means 20-2 having the tension coil spring 224, the central control means 28 does not drive just by recognizing the shallow sitting, but it recognizes the shallow sitting. In addition, when an emergency such as a frontal collision, sudden deceleration, or sudden stop of a vehicle or a danger of a collision with a front obstacle is recognized, the traction means is driven.
On the other hand, in the traction means 20-3 including a motor and a driving roller, when the seated position is recognized, the motor 320 is immediately driven to pull the upper surface of the belt-shaped central piece backward, and the seat back It may be moved to a position where it is seated deeply to the side, and the sitting posture in the shallow sitting state may be corrected. In other words, in addition to recognizing shallow sitting, when recognizing an emergency situation such as a frontal collision, sudden deceleration, or sudden stop of a vehicle or the danger of a collision with a front obstacle, not only driving towing means but also recognizing shallow sitting In this case, the traction means may be driven immediately.

  The belt-like central piece 12c 'is pulled under the frictional force that acts between the drive roller and the belt-like central piece when the drive roller 324 is driven to rotate. For this reason, it is preferable to apply an anti-slip process between the drive roller and the strip-shaped central piece 12c ', for example, by adhering an anti-slip sheet to the surface of the drive roller 324 so that a large frictional force is generated.

In the configuration in which the combination of the motor and the drive roller is the traction means 20-3, the traction of the belt-like central piece, that is, the movement distance of the seated person can be controlled by controlling the rotational drive of the drive roller 324.
That is, the central control unit 28 recognizes the sitting position from the pressure data detected by the pressure sensor 22, that is, the pressure distribution, and an ON signal is sent from the central control unit to the motor 322 to start rotation of the motor. The pressure distribution (pressure data) detected by the pressure sensor 22 is output from the pressure sensor 22 to the central control means 28 during the backward movement of the seated person. When the central control means 28 determines from the pressure distribution that the seated person has moved backward to the position where the seated person corrects the sitting position in the seated state, that is, the seat back side, the motor is turned off and a motor-off signal is output. 322 stops, the pulling of the belt-shaped central piece is finished, and the movement distance of the seated person is controlled.

  If the driving roller 324 is rotationally driven counterclockwise, the strip-shaped central piece 12c 'of the trim cover can be returned to the initial position before towing. In other words, if the central control means 28 recognizes that the seated person is away from the pressure distribution detected by the pressure sensor 22, the motor 322 is driven in the reverse direction under the control of the central control means. Then, if the driving roller 324 is driven to rotate counterclockwise, the upper surface of the strip-shaped central piece 12c 'is pulled forward, and the strip-shaped central piece is returned to the initial position before towing. Therefore, the belt-like central piece 12c 'always stands by in the same state and does not give a sense of incongruity.

FIG. 10 (A) is a plan view of a seat cushion in another embodiment (Example 2) of the present invention separated from the seat, and FIGS. 10 (B) and 10 (C) show a case where an isolated skin is interposed and an isolated skin is not interposed. The schematic diagram is shown respectively.
In the above embodiment (embodiment 1), the seat pad 12p is integrally formed in the front-rear direction, whereas in another embodiment (embodiment 2), the seat pad is divided into three in the front-rear direction. It differs in the point currently shape | molded and the other structure is common in Example 1,2.

  In the second embodiment, the seat pad 12p is divided into three parts in the front-rear direction, and the strip-shaped central piece 12c 'of the trim cover is also divided into three parts in the front-rear direction corresponding to the seat pad. Then, the front piece 12c′-f, the central piece 12c′-c, and the rear piece 12c′-r of the belt-shaped central piece correspond to the front part 12p-f, the central part 12p-c, and the rear part 12p-r of the corresponding seat pad. It is wound around.

Among the front piece 12c'-f, the central piece 12c'-c, and the rear piece 12c'-r of the belt-like central piece, the central piece of the belt-like central piece that wraps around and winds the central portion 12p-c of the seat pad However, only the traction means can be slid (movable) on the seat pad.
That is, as shown in FIG. 10 (B), the isolated skin 16 with its front and rear ends fixed is disposed between the center portion 12p-c of the seat pad and the central portion 12c'-c of the belt-shaped central piece, and is pulled The means is connected to the central piece of the strip-shaped central piece so that the central piece of the strip-shaped central piece can slide on the seat pad. Alternatively, as shown in FIG. 10C, a friction reducing agent such as silicon spray is applied to the surface of the central portion 12p-c of the seat pad that is in contact with the central portion 12c′-c of the strip-shaped central piece of the trim cover. Infiltrated, the traction means is connected to the central piece of the strip-shaped central piece, so that the central piece of the strip-shaped central piece can slide on the seat pad.

For example, the pressure detection means 22 including a series of pressure sensors is disposed in the center portion 12p-c of the seat pad as shown in FIG.
As in the first embodiment, the traction means 20-1 made of a pretensioner is disposed on the back side of the seat back and is connected to the central piece 12c′-c of the belt-shaped central piece to pull the central piece of the belt-shaped central piece. It is configured to be possible.
Except for the point that the pretensioner pulls the central piece 12c′-c of the strip-shaped central piece 12c ′, the second embodiment has the same configuration as the first embodiment. And the structure (refer FIG. 10 (B)) which interposed the isolation | separation skin 16 between the center part 12c'-c of the strip | belt-shaped center piece of a trim cover, and the center part 12p-c of a seat pad, In any of the configurations (see FIG. 10C) in which a friction reducing agent is applied or penetrated on the surface and the isolation skin is omitted (see FIG. 10C), the central portion 12c′-c of the belt-shaped central piece limits the distance by driving the pretensioner. It is pulled smoothly backward without doing.
Therefore, in any of the configurations shown in FIGS. 10B and 10C, the central piece 12c′-c of the belt-like central piece that has been pulled and increased in tension lifts the seat occupant from the state of sinking under its own weight, and the seat back It moves to the position where it sits deeply to the side, and the sitting posture in the sitting state is corrected.

FIG. 11A is a plan view of a seat cushion in another embodiment (Example 3) of the present invention separated from the seat, FIG. 11B is a case where an isolated skin is interposed, and FIG. The schematic diagram in the case where it is not allowed is shown respectively.
The seat pad 12p is integrally molded in the front-rear direction in the above-described embodiment (embodiment 1), and is divided into three in the front-rear direction in another embodiment (embodiment 2), while the other This example (Example 3) is different in that it is divided into two parts in the front-rear direction, and the other configurations are common to Examples 1-3.

  That is, in the third embodiment, the seat pad 12p is formed by being divided into two in the front-rear direction (front half part and rear half part), and there are also two strip-shaped central pieces 12c ′ of the trim cover in the front-rear direction corresponding to the seat pad. It is divided into (first half piece, second half piece). Then, the front half piece 12c′-f ′ and the rear half piece 12c′-r ′ of the belt-shaped central piece are wound around the front half part 12p-f ′ and the latter half part 12p-r ′ of the corresponding seat pad. Yes. The rear half 12p-r 'of the seat pad is longer than the front half 12p-f', for example, 1.5 to 2.0 times as long as the front half.

  Only the rear half portion 12c'-r 'of the belt-like central piece that wraps around and wraps around the rear half portion 12p-r' of the seat pad is slidable on the seat pad by pulling of the pulling means. As shown in FIG. 11A, the pressure detection means 22 including a series of pressure sensors is disposed in the rear half 12p-r ′ of the seat pad.

Also in the third embodiment, for example, the pulling means 20-1 made of a pretensioner is disposed on the back side of the seat back and is connected to the rear half piece 12c′-r ′ of the belt-like central piece so as to be the latter half of the belt-like central piece. The piece can be pulled.
The third embodiment has the same configuration as the first embodiment except that the pretensioner pulls the second half piece 12c′-r ′ of the belt-shaped central piece 12c ′. And the structure (refer FIG. 11 (B)) which interposed the isolation | separation epidermis 16 between the latter half part 12c'-r 'of a strip | belt-shaped center piece, and the latter half part 12p-r' of a seat pad, and the latter half of a seat pad In any of the configurations in which the frictional reducing agent is applied or infiltrated into the surface of the part and the isolation skin is omitted (see FIG. 11C), the second half part 12c′-r ′ of the belt-like central piece is driven by the pretensioner. Is smoothly pulled backward without limiting the distance.
Therefore, in any of the configurations shown in FIGS. 11B and 11C, the rear half portion 12c′-r ′ of the belt-like central piece that is pulled and increased in tension lifts the seat occupant from the state where it sinks under its own weight, It moves to the position where it is seated deeply on the seat back side, and the sitting posture in the sitting state is corrected.

  10B, 11C, and 11C, traction means 20-1 including a pretensioner is illustrated. However, similarly to the first embodiment, a restricting member such as a solenoid, a pulling means 20-2 having a tension coil spring, and a pulling means 20-3 having a motor and a drive roller can also be adopted in the second and third embodiments. Needless to say.

  As described above, according to the present invention, the belt-like central piece of the trim cover of the seat cushion is pulled rearward without limitation of the distance under the driving of the traction means, and the belt-like central piece is pulled and increased in tension. The seat moves to a position where a seated person is seated deeply on the seat back side, and the sitting posture in the shallow sitting state is corrected. The seat belt 15 can satisfactorily exhibit the restraining performance against the submarine phenomenon and function effectively by correcting the seated posture of the shallow seat and sitting deeply on the seat back side.

  The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention. All modifications, alterations, etc. within the technical scope of the present invention are included in the present invention. Needless to say.

  The present invention is not limited to ordinary vehicle seats such as buses, passenger cars, and aircraft, except for a configuration for detecting and detecting an emergency situation such as a frontal collision of a vehicle and a collision with a front obstacle. It can be applied to a wide range of seats, for example, seats used in office work (office chairs), seats installed in public halls, theaters, movie theaters, sports facilities, and the like.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 12 Seat cushion 12c Trim cover 12c 'Strip-shaped center piece 12c'-f, c, r Trim cover front piece, center piece, rear piece 12c'-f', r 'Strip-shaped center Front half piece, rear half piece 12p Seat pad 12p-f, c, r Seat pad front, center, rear 12p-f ', r' Front half of seat pad, rear half 12f Seat frame 12s Left and right Side (bank)
16 Isolation skin 16f, 16r Front and rear ends of isolation skin 20 (20-1, 20-2, 20-3) Traction means 22 Pressure detection means 24 Collision detection means 26 Collision detection means 28 Central control means 30 Connecting plate 120 Pre Tensioner 120a Wire 222 Solenoid (regulating member)
222a Plunger 224 Tension coil spring 322 Motor 324 Driving roller

Claims (14)

In a vehicle seat that includes a seat cushion, a seat back formed by covering a seat pad with a trim cover and covering the seat pad with a trim cover, and restraining a seated person with a seat belt,
The trim cover of the seat cushion is separated from the left and right sides, and has a belt-like central piece wound around the seat pad in the front-rear direction.
The strip cover central piece of the trim cover, an isolation skin disposed between the seat pad to isolate the strip cover central strip from the seat pad, and to allow the strip cover central strip to slide on the seat pad;
Towing means connected to and driven by the strip-shaped central piece of the trim cover to slide the trim-covered central piece of the trim cover on the seat pad through the isolation skin and pull the upper surface of the strip-shaped central piece of the trim cover backward ,
A vehicle seat comprising:   2. The vehicle seat according to claim 1, wherein the front and rear ends of the isolated skin are fixed to prevent sliding integrally with the strip-shaped central piece of the trim cover.   The vehicle seat according to claim 1, wherein the isolation skin is a smooth surface that is in contact with the strip-shaped central piece of the trim cover. In a vehicle seat that includes a seat cushion, a seat back formed by covering a seat pad with a trim cover and covering the seat pad with a trim cover, and restraining a seated person with a seat belt,
The trim cover of the seat cushion is separated from the left and right sides, and has a belt-like central piece wound around the seat pad in the front-rear direction.
Enables sliding of the strip-shaped central piece of the trim cover on the seat pad,
A vehicle having a traction means that is coupled to and driven by the belt-like central piece of the trim cover and that slides the belt-like central piece of the trim cover on the seat pad to pull the upper surface of the belt-like central piece of the trim cover backward. Sheet.   A friction reducing agent is applied or infiltrated into a surface of the trim cover strip-shaped central piece that is in contact with the seat pad or the surface of the seat pad to allow the strip central strip of the trim cover to slide on the seat pad. 4. The vehicle seat according to 4.   The vehicle seat according to any one of claims 1 to 5, wherein the strip-shaped central piece of the trim cover is wound around the seat pad from the front end to the rear end of the seat pad. The seat pad is divided into a front part, a center part, and a rear part in the front-rear direction, and molded.
The vehicle seat according to any one of claims 1 to 5, wherein traction means is connected to a central piece of a belt-like central piece of a trim cover that wraps around the central portion of the seat pad. The seat pad is divided into the first half and the second half in the front-rear direction,
The vehicle seat according to any one of claims 1 to 5, wherein a traction means is connected to the rear half of the belt-like central piece of the trim cover that wraps around the latter half of the seat pad.   The vehicle seat according to any one of claims 1 to 8, wherein the traction means includes a pretensioner connected to a belt-like central portion of the trim cover and is disposed on the back side of the seat cushion.   The pulling means has one end fixed, and the other end is connected to the belt-like central portion of the trim cover and extended between the belt-like central portion of the trim cover. A tension coil spring that can pull the tension coil and a regulating member that restricts the pulling of the belt-shaped central part by restraining the movement of the tension coil spring and is arranged on the back side of the seat cushion, and releases the restraint of the tension coil spring by the regulating member The vehicle seat according to claim 1, wherein the belt-like central portion is pulled under a tensile force of the tension coil spring.   11. The vehicle seat according to claim 10, wherein the restricting member is a solenoid attached to the frame of the seat cushion on the back side of the seat cushion, and the tension coil spring is restrained by a plunger protruding from the solenoid by a biasing force of a spring built in the solenoid. .   The traction means includes a motor and a driving roller that is pressed against the belt-like central portion of the trim cover from the back side and is driven to rotate to pull the upper surface of the belt-like central portion backward when the motor is driven. The vehicular seat according to any one of claims 1 to 8 arranged on the back side. A pressure sensor that is disposed on the seat cushion and detects sitting in a shallow state from the detected pressure distribution of the seated person;
Collision detection means for detecting frontal collision, sudden deceleration, sudden stop from acceleration;
Further comprising
When the pressure sensor detects seating in a sitting state, and when the collision detection means detects a front collision, sudden deceleration, or sudden stop, the traction means is driven to pull the upper surface of the belt-like central portion of the trim cover backward. Item 13. The vehicle seat according to any one of Items 1 to 12. A pressure sensor that is disposed on the seat cushion and detects sitting in a shallow state from the detected pressure distribution of the seated person;
A collision prediction means for measuring the distance to the obstacle in front and predicting the danger of collision with the obstacle in front;
The vehicle seat according to any one of claims 1 to 12, wherein when the collision prediction means predicts the danger of a collision with a front obstacle, the traction means is driven to pull the upper surface of the belt-shaped central portion of the trim cover backward.

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