JPH03267710A - Gravitational inclination detector and seat surface adjusting device for vehicle seat using the same detector - Google Patents

Abstract

PURPOSE:To prevent a crew on the seat from feeling uncomfortable by providing a gravitational inclination detector, detecting the inclination of the vehicle, and slanting only the rear part of a seat surface formation part. CONSTITUTION:The seat surface formation part 4 faces the seat surface of a seat in the vehicle, its front part is fixed to a base 3, and the rear part is fitted to the base 3 through a coupling material 5. The interval between the lower parts of the coupling material 5 is made wire than the interval between the upper parts and the detector 6 is installed nearby the seat surface formation part 4. The detector 6 is constituted by charging colored liquid 6f in a hollow tube 6b which is coupled endlessly and fitting a sensor 6c to left and right longitudinal tube 6d and 6e, and the sensor 6c detects the gravitational inclination by a light emission part 6j and a light reception part 6k which face each other and transmits the inclination to a controller 10. Then the controller 10 controls a driving means 7 according to the output signal of the detector 6 and the driving means 7 is coupled with the seat surface formation part 4 to slant only the rear part of the seat surface by 90 deg. to composite acceleration.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a gravitational tilt detector and a seat adjustment device for a vehicle seat using this detector, and its purpose is when a vehicle such as an automobile is traveling around a curve, etc. Or, when changing course, if the posture or position of an occupant or object changes due to centrifugal force or rapid acceleration or deceleration of the vehicle, the seat should be placed so that the posture or position of the occupant or object is not affected by the resultant acceleration. The present invention provides a gravity tilting detector for tilting a surface and a seat adjustment device for a vehicle seat using this detector.

In addition, in this specification, gravitational force is the resultant acceleration,
A force that is a combination of the centrifugal acceleration that a vehicle receives in the lateral direction while driving and the gravitational acceleration of the vehicle.

(Prior Art) Conventionally, vehicle seats are usually fixed to a floor panel.

Therefore, for example, when a car changes course or turns a curve while the car is running, the centrifugal force applied causes the car body to lean to one side in the width direction, and the seat surface of the seat also leans.

To explain in detail, when the vehicle is stopped, only the gravitational acceleration acts on the seat, and when the vehicle is moving, the seat receives the resultant acceleration, which is the centrifugal acceleration in the left and right direction combined with the gravitational acceleration, based on the change of course of the vehicle, etc. will be working. At this time, the attractive force tilts toward the centrifugally accelerated coal from a substantially vertical downward direction.

This resultant acceleration also acts on people and objects on the seats.

For example, if a moving car changes course to the left,
Gravitational acceleration (G) and centrifugal acceleration (ΔG) to the right act on the car (see Figure 17 (A)), and the car body is affected by either these two accelerations or the combined acceleration (g) (gravitational force). It hangs in the lower right direction (see FIG. 17(B)).

Therefore, people and objects on the seats are pulled toward the lower right.

At the same time, the tires and springs that support the car body contract, causing the car body to tilt to the lower right.

The seats inside the car are integrated with the car body, so if you tilt the car body toward the bottom right, the seat will also tilt in the same direction.

Therefore, people and objects on the seat are pulled further toward the lower right on the seat surface that is tilted toward the lower right.

The person inside the car tries to use a knife to correct the tilting of the body to the lower right side, and tries to take an unreasonable posture and loses the freedom of the body. It may sway in one direction or another.

Furthermore, lateral swaying may induce car sickness.

Additionally, objects on the seat may fall off and be damaged due to the inclination of the seat surface.

As a technique for preventing such adverse effects caused by the resultant acceleration (g), there is a vehicle seat disclosed in, for example, Japanese Utility Model Application Publication No. 1-73427.

As shown in FIGS. 18(A) and 18(B), the main components of this vehicle seat include a seat cushion (a), cross link legs (b), and springs (C).

The horizontal width of the lower ends of the cross link legs (b) is wider than the horizontal width of the seat cushion (a).

In this vehicle seat, when the vehicle receives a composite acceleration (g) including lateral acceleration, the seat also tilts in the direction of the composite acceleration (g) through the elastic deformation of the spring (C).

However, the left-right width of the seat cushion (a) is narrower than the left-right width of the lower ends of the cross-link legs (b), so even if the seat is tilted, the seat surface receives the resultant acceleration (g). (See FIG. 18(B)).

(Problems to be Solved by the Invention) However, the above-mentioned vehicle seat also had the following problems.

In other words, this vehicle seat is designed to physically adjust the seat surface or respond to the resultant acceleration of the vehicle, so it is sensitive to minute vibrations that do not require the seat to be held horizontally. Therefore, the seat may be tilted to the left or right more than necessary, resulting in poor riding comfort for the occupants.

In addition, this vehicle seat has a seat cushion (a
), the unbalanced weight of the occupant would generate a lateral force within the internal link mechanism, resulting in the seat cushion (a) remaining tilted and not returning to its original position.

Moreover, in this vehicle seat, the entire seat cushion tilts when the vehicle rolls, so even the front part of the seat surface also tilts from side to side.

For this reason, the occupant's legs (thighs) are forced to move up and down each time the seat is tilted, and the occupant feels very uncomfortable when the legs are forced up and down in this way.

(Means for Solving the Problems) The present invention includes a hollow tube and a sensor, the hollow tubes are connected in an endless manner, the vertical tubes are bilaterally symmetrical, and a liquid is contained inside. is enclosed, and sensors are installed in the left and right tubes in the vertical direction, and the installation positions of the sensors are near the liquid surface, and when the left and right tubes are upright, the tilt detection target part is horizontal and the liquid is in the horizontal direction. A gravity tilting detector, a base, a seat forming part, and a connecting member, characterized in that a line connecting the sensors and the tilting detection target part are substantially parallel when the sensor is not subjected to acceleration. It has a detector, a controller, and a driving means, and the seat surface forming part corresponds to the seat surface of the seat in the vehicle, and the front part is fixed to the base and the rear part is connected to the base via a connecting member. The connecting member is installed between the base and the seat forming part so that the seat forming part can be tilted freely, and the interval between the lower parts of the connecting member is wider than the interval between the upper parts, and the detector is The sensor is installed near the seat forming part to detect the tilting of gravity and transmits this to the controller, and the controller controls the driving means in accordance with the output signal from the detector, and the driving means is connected to the seat forming part. The above-mentioned seat surface adjustment device for a vehicle seat is characterized in that when a tilting force of gravity is detected by the detector, a part of the seat surface is tilted in a direction of 90 degrees with respect to the gravity force under the control of the controller. Solve traditional issues.

(Embodiment) Hereinafter, a first embodiment of a gravitational tilting detector according to the present invention and a seat adjustment device for a vehicle seat using this detector will be described.

FIG. 1 shows a state in which a seat surface adjustment device (1) according to the present invention is installed inside a seat (2).

This seat adjustment device (1) is as shown in Figs. 2 and 3.
It has a base (3), a seat forming part (4), a connecting member (51 (51), a detector (6), a driving means (7), and a controller aω, and in this embodiment, the back plate (23 ) is provided.

The base (3) fixes the front part of the seat forming part (4) and supports the connecting member (5) (51), and is plate-shaped in this embodiment.

The shape of the base (3) is not limited as long as it has the structure described above, and may be frame-shaped, for example, or may be provided in advance within the seat.

The seat surface forming part (4) is a part corresponding to the seat surface of the seat, and in this embodiment, the spring part (4a) and the side rod (
4b) (4b) and the rear part (4c) are separated, and a plurality of springs are stretched in the lateral direction, and the side ends of these springs are connected to the side rod (4b) (4b) made of a metal rod or the like.

The rear ends of the side rods (4b) (4b) are connected to each other by a rear part (4C).

The front part (4d) of this seat forming part (4) is connected to the side rod (4b).
) (4b) is attached to the fixed frame (4b) attached to the base (3).
8).

The front end of the side rod (4b) (4b) and the fixed frame (8) may be connected, for example, by a universal joint.

In this embodiment, the connecting member (5) is an L-shaped bar, and the lower end is connected to the hole (9) of the fixing member (9) fixed to the base (3).
a) so as to be freely rotatable left and right, and the upper end portion is fixed to or integrated with the side rod (4b).

The lower end of this connecting member (5) (5) is connected to the side rod (4b)
(4b), and therefore, when the seat forming part (4) is not tilted, the upper surface of the base (3) and the left and right connecting members +5) (4)
The shape formed by the rear part of the body is said to be an isosceles trapezoid with the lower base longer than the upper base.

The detector (6) is attached near the seat forming part (4), in this embodiment, on the back of the back plate (23), but between the rear of the seat forming part (4) and the base (3). It may be installed at the rear (4c) between the two.

This detector (6) consists of a hollow tube (6b) and an optical sensor (6c) (
6c) is installed inside.

The hollow tube (6b) is made up of transparent glass tubes or plastic tubes connected in an endless manner, and the left and right tubes (6d) and (6e), which are vertical tubes, are symmetrically raised. .

Inside this hollow tube (6b) is a colored liquid (6f) (this colored liquid preferably has an appropriate viscosity and an appropriate frictional force with the hollow tube (6b), and in this embodiment, Contains a black water-soluble dye (a mixture of soap and water).

The left and right liquid levels (6g) (6h) of this liquid (6f) are:
When the lower tube (61) is substantially horizontal and is not subjected to lateral acceleration, the lower tubes (61) are at substantially the same height.

When the lower tube (61) tilts to one side, the liquid level in the upwardly inclined tube will decrease, and the liquid level in the downwardly inclined tube will rise (Fig. 4 (B) )reference).

When the seat adjustment device (1) is not in operation, this lower tube (61) is approximately parallel to the upper surface of the base (3).

When the lower tube (61) is not linear, for example, circular, the straight line connecting the ends of the circular arc is parallel to the top surface of the base (3).

In other words, the upper surface of the base (3) is substantially horizontal, the rear part of the seat forming part (4) is not tilted, and the detector (6) is not subjected to lateral acceleration (hereinafter referred to as normal). ) at the left and right liquid levels (6g) (6h) in the detector (6)
) is substantially parallel to the top surface of the base (3).

Optical sensors (6c) (6c) are provided in the left and right tubes (6d) (6e) of this hollow tube (6b).

The installation position is near the liquid level (6g) (6h), and the tilt detection target part (for example, the rear part of the seat) and the optical sensor (6c).
) (6c) It is a position where the lines connecting them are almost parallel,
In this embodiment, the left and right tubes (6d) and (6e) are approximately the same.
Mounted in a high position.

Therefore, the line connecting the optical sensors (6c) (6c) and the line connecting the left and right liquid levels (6g) (6h) are also substantially parallel.

This optical sensor (6c) has a light emitting part (6j) and a light receiving part (6j).
In this example, a groove (6 m) is formed in the center, and a light emitting part (6j) and a light receiving part (6k) are provided facing each other with this groove (6 m) in between. , light receiving section (6
k) is a photointerrupter configured to generate an output signal upon receiving the light beam from the light emitting section (6j).

This optical sensor (6c) is connected to the hollow tube (6m) in the groove (6m).
b) is attached to this hollow tube (6b) by pinching it.

A light beam is always emitted from the light emitting portion (6j) of this optical sensor (6c).

In this embodiment, the optical sensor (6C) is installed at a position such that the liquid levels (6g) (6h) of the left and right tubes (6d) (6e) are approximately at the center of the optical sensor (6c) in normal times. In other words, the amount of light received is approximately 1/2.

Therefore, in normal times, both the left and right optical sensors (6c) are in an equilibrium state in which the amount of light rays from the light emitting part (6j) to the light receiving part (6k) is approximately the same.

(6n) is an amplifier for amplifying the power generated in the light receiving section (6k).

In addition to the above configuration, the detector (6) may also include, for example, the liquid sealed in the hollow tube (6b) such as mercury or salt water, and the left and right tubes (6d) (6e) instead of the optical sensor.
), and detect the difference using a proximity switch or the like, or by floating a float in transparent water or oil and detecting its movement using an optical sensor. Alternatively, a structure in which detection is performed using a proximity switch or the like may be adopted.

As shown in FIGS. 5 and 6, the drive means (7) includes a drive source such as a motor (II) capable of forward and reverse rotation, and a housing 051.
The output signal generated by the optical sensor (6c) (6c) is transmitted to the next controller (10) and the next controller (101). is driven by the output signal of

In addition to the motor, the driving source may include a hydraulic cylinder, an air cylinder, etc.

When the shaft of the motor Ql) rotates, a driving gear (12a) integrated with this shaft rotates, and a driven gear (12b) meshing with this driving gear (12a) rotates.

One end of a drive rod 03 is connected to the center of the driven gear (12b).

The other end of this drive rod σ3 is the rear part (
4c) is loosely fitted into the protruding member aΦ attached to the substantially central portion.

In this embodiment, a bolt is used as the protruding member.

Therefore, by operating the motor aD, the drive rod 0e
or left or right, and the rear part of the seat forming part (4) moves to the left or right via the protruding member (2) loosely fitted to the other end of the drive rod G3.

Since the connecting members (5) (5) are rotatably attached as described above, the connecting members (51) (51) are also rotated in the direction of movement of the seat forming portion (4).

Here, the base (3), the seat forming part (4) and the connecting member (5)
The shape of (5) is considered to be an isosceles trapezoid in peacetime, so
When the seat forming part (4) is moved to one side, one of the connecting members (5) stands up and the other connecting member (5) falls down.

As a result, the rear portion (4c) will tilt relative to the base (3).

In addition, in this embodiment, the side rod (4b) on the base (3)
A limit switch 0 connected to the motor within the movement trajectory of
Q is installed (see Figure 3).

The motor 01) of the driving means (7) is controlled by the following controller Go.
) is connected by wiring.

The controller 00) connects the detector (6) and the motor O
D and the limit switch 000■ are connected by wiring, and the motor (11) is electrically controlled by the output signal from the detector (6) and the limit switch 000■.

This controller α0) is connected to the vehicle (
For example, it is connected to a power source for a cigarette (for example, a car).

Note that (24) in FIG. 2 is a connector between the detector (6) and the controller Go+, and between the controller 00)' and the driving means (7).

In this embodiment, a cushion material 0 is inserted between the base (3) and the seat forming part (4), and the seat forming part (4)
Even if the weight of the occupant is placed on the cushion member Gη, the load is borne by the cushioning material Gη, and the driving means (7) aims to reduce the force required for driving.

The state of use of the above-mentioned vehicle seat surface adjustment device will be explained as follows with reference to the flowchart shown in FIG.

Insert the power plug of the seat surface adjustment device (1) of the vehicle seat into a 12V power source in the vehicle and start it (Step 1).

When the vehicle is running, the detector (6) detects the seat (2).
) is detected (step 2).

Assuming that the vehicle is currently traveling on an oil road, the occupants and objects are subjected to a resultant acceleration (g) in the downward direction opposite to the curve direction of the oil road, as described above.

If the road surface is not perpendicular to this resultant acceleration (g), the vehicle will also receive the resultant acceleration (g) in the same direction as the occupants and tilt.
The seats inside the car also tilt accordingly.

Then, the detector (6) of the seat adjustment device (1) detects the tilting of this resultant acceleration (g) with respect to the seat (in other words, the tilt angle (ΔF) between the seat and the gravitational force acting on it).

In other words, the hollow tube (6b) tilts in the direction in which it receives the resultant acceleration (g), and the liquid (6f) inside it tilts at its liquid level (6g).
) (6h) is always deformed so that it is approximately perpendicular to the resultant acceleration (g), so the liquid level (6g) (6
In h), the liquid level (6g) of the tube on the side in the direction of action of the resultant acceleration (g) (for example, the left tube (6d)) rises, and conversely, the liquid level (6g) of the tube on the opposite side (for example, the right tube (6e)) rises. The liquid level (6h) decreases (see Figure 4(B)).

If this liquid level (6h) is below the mounting position of the optical sensor (6c), the light emitting part (6") of the optical sensor (6c)
The light beam is received by the light receiving section (6k), and the light receiving section (6k) is turned on.

At this time, the liquid level (6g) in the left tube (6d) rises, so the liquid (6f) causes the optical sensor (6c) on the left tube (6d) side to rise.
)'s light emitting part (6'') is blocked, and the light receiving part (6k)
is turned off.

Optical sensors (6c) for the left and right tubes (6d) (6e)
Controller (10) as a signal or difference in the output of (6c)
can be conveyed to.

If the road surface is perpendicular to the resultant acceleration (g), the inclination of the lower tube (61) in the detector (6) and the liquid (6f) in the detector (6) are parallel; Therefore, the tilting lock state is maintained at the height of the liquid level (6g) (6h) (step 3).

Here, the tilting lock refers to a state in which the seat forming part (4) does not tilt, and in this embodiment, the seat forming part (4) does not tilt due to the meshing of the teeth of the worm gear 0z, and due to the unbalance of the weight of the occupant, etc. It is recommended not to do so.

The tilting lock may be any mechanism that mechanically maintains the seat forming part (4) in a stopped state, and other than a worm gear, a motor with a brake, a hydraulic cylinder, a pneumatic cylinder, etc. can be used.

In the controller 00), when one of the liquid levels (6h) falls, for example, when the seat forming part (4) tilts to the upper right side, the signal from the detector (6) is regarded as greater than 0,
In order to confirm whether a signal is sent to the driving means to tilt the seat forming part (4) to the upper left, or whether or not the tilting of the seat forming part (4) to the upper left has reached its limit. The limit switch 00 is activated (step 4).

When it is confirmed that the tilting of the seat forming part (4) has not reached its limit, the tilting lock is turned OFF, and the driving means (7) drives the seat forming part (4) to tilt upward and to the left.

This drive continues until the liquid level (6g) (6h) of the detector (6) becomes equal to or equal to the liquid level (6g) (6h).
h) and the line connecting the optical sensor (6c) (6c) is continued until the line connecting the optical sensor (6c) becomes substantially parallel.

Here, the optical sensor (6c) (6c) is connected to the seat forming part (
4) is attached substantially parallel to the rear part (tilt detection target part).

In other words, the tilting angle (ΔF) between the seat surface and the gravitational force acting on it, which occurs due to the tilting of the resultant acceleration (g) with respect to the seat surface, becomes 0 (as a result, the rear part of the seat surface forming part (4) (step 5).

The worm gears σ are driven by the rotation of the shaft of the motor αD, and the drive rod a3 is rotated (in this case, the detector (
6)) The rear part of the seat forming part (4) is also moved to the left.

When the seat forming part (4) is moved, the connecting member (5) (5)
In this case, the connecting member (5) on the left side gradually rises and the connecting member (5) on the right side gradually falls down.

Since the interval between the lower parts of the connecting member (5) (5) is wider than the interval between the upper pipes, the seat forming part (4) is connected to the connecting member (5).
) becomes lower on the side that rotates inward, and becomes higher on the side that rotates the connecting member (5) outward.

As a result, the side (left side) of the seat forming part (4) receiving the resultant acceleration (g) moves upwards, and the opposite side (right side) lowers, so that the vehicle and the seat (2) receive the resultant acceleration (g). Even though it is tilted in the direction in which it receives g), the seat surface is at an angle that does not receive the tilting angle (ΔF) between the seat surface and the gravitational force acting on it, which occurs due to the tilting of the resultant acceleration (g) against the seat surface. It is tilted like this.

Here, the part of the seat forming part (4) that tilts is the seating reference point (P) (JISD46
As described above, only the rear part of the seat including the position of the crotch joint of the human body model stipulated in 2007-1970 is fixed and does not tilt as described above.

The reason for this is that if the front part of the seat also tilts, the occupant's thighs will be forced to move up and down, causing discomfort for the occupant. It is sufficient if only the portion including the bearing reference point (P) is in the direction perpendicular to the direction of the resultant acceleration (g).

Resultant acceleration (g) of at least the rear part of the seat forming part (4)
When the direction is perpendicular to the direction of , the detector (6) installed approximately parallel to this seat forming part (4) also becomes in the same direction, and the liquid level (6g) in the hollow tube (6b) ( 6h) also return to approximately the same height as each other.

When the controller 00) confirms that the signal from the detector (6) has become 0, the tilting lock is turned on.
The drive means (7) are stopped.

In addition, if the seat forming part (4) is at the tilting limit position (i.e., when one side lever (4b) of the seat forming part (4) is in contact with the base (3)) in step 4. is the tilting angle (ΔF ), the tilting lock is ON.
It is said that

The reason for this is that if the motor αD is driven even after the seat forming portion (4) reaches the tilting limit position, this will cause damage to the tilting mechanism or seizure of the motor 01).

In addition, if the other liquid level (6g) drops, contrary to the above, the signal from the controller 00) or the detector (6) will be interpreted as being smaller than O, and the signal will be used to tilt the seat forming part (4) upward and to the right. Or sent.

Furthermore, if the traveling route of the vehicle changes from, for example, an oil road to a horizontal straight road, the centrifugal acceleration (ΔG) applied to the vehicle body, occupants, etc. no longer exists, and the vehicle body and seats naturally become horizontal.

Here, if the seat surface is held at right angles to the direction of the resultant acceleration (g) when traveling on the oil road, then when the road enters a straight road, this seat surface will be Even though the direction changes directly downward, it does not immediately tilt in a direction perpendicular to that direction, so it remains tilted.

However, in this case as well, there is a discrepancy in the height of the liquid level on the left and right sides of the hollow tube (6b), and an output signal is generated at the detector (6), which is transmitted to the controller (101).
Motor αD is the light receiving part (6k) of the detector (6) (6k)
As a result, the seat surface has a resultant acceleration (G) that is only the gravitational acceleration (G) of the vehicle.
g) is gradually tilted in a direction perpendicular to

The same applies when the speed of the vehicle is reduced or stopped while traveling on four roads.

In addition, the seat surface adjustment device (1
) works, please refer to the hollow tube (6b)
The amount of liquid (6f) inside or the attachment of the optical sensor (6C) can be arbitrarily set by adjusting the height, etc.

That is, the liquid level (6g) (6h) and the optical sensor (6C
), or the lower pipe (6j) is shortened, the accuracy of the tilt angle detection of the detector (6) becomes rougher. The resolution becomes smaller, and the tilting angle when the seat adjustment device (1) initially operates becomes larger.

In addition, in this embodiment, the left and right tubes (ad) (6e) of the hollow tube (6b) are used to prevent vibrations in the longitudinal and vertical directions of the vehicle.
The liquid level (6g) (6h) of the liquid (6f) inside moves in almost the same way, so in this case, the optical sensor (6c)
(6c) is maintained in equilibrium.

Finally, after the tilt lock is turned on (step 3), it is determined whether or not to stop the seat adjustment device (1).

For example, when you finish driving the vehicle, the seat adjustment device (
If the operation of 1) is not required, the answer is "YES", and the plug is removed from the vehicle and stopped.

If the seat adjustment device (1) needs to be operated while driving, etc., the status will be "NOo" and the seat will be adjusted repeatedly.

Next, another embodiment of the seat surface adjustment device for a vehicle seat according to the present invention will be described.

A second embodiment is shown in FIGS. 9(A) and 9(B). In this example, a triangular raised portion (3a) that slopes upward toward the front is formed on the side of the base (3). The front part of this base (3) is also raised.

Then, a side rod (4b) is constructed across the upper end of the connecting member (5) and the top of the raised portion (3a) of the base (3), and the side rod (4b) is constructed between the connecting member (5) and the raised portion (3a). The upper edge and side rods (4b) form a triangle.

A third embodiment is shown in FIGS. 10(A) and 10(B), and in this example, both sides and the front part of the base (3) are raised up, which is the same as in the second embodiment. In this embodiment, a triangular plate is used as the connecting member (5).

In this embodiment, the lower edge of the plate is rotatable or the upper edge of the raised portion (3a), and a spring portion (4a) is connected to the upper edge of the plate.

FIG. 11 shows a fourth embodiment, in which the base (3
) is raised up, or a fixing member is attached to the front part of the base (3), and there is no side rod (4b), and the seat forming part (4) is formed only by the spring part (4a). There is.

FIG. 12 shows a fifth embodiment, in which a telescopic spring or the like is used as the throwing shuttle (4c) of the seat forming part (4), and the center of the rear edge of the base (3) is used. Seat forming part (4)
A movable rod is installed between the rear ends of both sides of the
The lower end of the movable rod 0g of the book is connected to a roller 09, and a structure is adopted in which this roller 09 rolls on a rail (not shown) at the rear edge of the base (3).

Roller a9 is rolled in the left and right direction by an appropriate driving source,
The drive source, like the motor αD, is driven under the control of the controller 00) which receives a signal from the detector (6).

When the roller 09 rolls and shifts, the movable rod αeqg is rotated in the left and right directions, thereby causing the connecting member +5) (5) to be rotated in one direction left and right, and the seat forming portion (4) to be tilted. Ru.

In the second to fifth embodiments described above, the cushion material q'?
) is not inserted, but in these examples as well, the cushioning material aη can be freely inserted between the base (3) and the seat forming part (4). The configuration of the seat adjustment device (1) according to these modified embodiments other than the above is the same as that of the first embodiment.

In addition to the gravity tilting detector (6), the seat adjustment device (1) is equipped with one or all of a tilting angle detector (2), a traveling speed detector (21), and a vehicle traveling direction angle detector (22). can be used.

In FIG. 13, the gravity tilting detector (6) is attached to the rear edge of the base (3), and the tilting angle detector (2) is attached to the housing 09 of the drive means (7).

Seat adjustment device (1) when using this tilt angle detector
The usage status of is explained in a flowchart (14th
(see figure).

In this figure, in step 2 (see Figure 7), the tilt angle (△T) between the seat and the gravitational force acting on it is detected, and
In parallel with this, the tilt angle detector■ detects the tilt angle of the seat (
A) is detected.

Then, in the controller 00), not only the direction of the tilting angle (ΔT) of the seat and the gravitational force acting on it, but also the specific value f(ΔT ).

Furthermore, the tilt angle (A) of the seat detected by the tilt angle detector (2) is subtracted from the f(ΔT) obtained here, and the difference is calculated.

Then, depending on whether this value is larger or smaller than 0, whether the tilt is upward to the left or upward to the right is transmitted to the driving means (7), and the driving means (7) drives accordingly.

In parallel with this, the tilt angle detector ■ detects the tilt angle of the seat surface (
The detection of A) continues, and this slope (A) and the f(8T
) The seat forming portion (4) is tilted by the driving means (7) until the difference between the value and the value determined by the method (4) becomes zero.

That is, in this embodiment, it is checked whether the actual tilt of the rear part of the seat forming part (4) is as per the value of f(8T) calculated by a microcomputer or the like.

FIG. 15 is a flowchart explaining an embodiment in which a vehicle speed detector (21) and a vehicle traveling direction angle detector (22) are used in combination in addition to the gravitational force tilt detector (6).

In this embodiment, the drive means (7 ) is driven or driven.

In the first stage, the gravitational force tilt detector (6), vehicle speed detector (21), and vehicle traveling direction angle detector (22) are operated in parallel, or in the flowchart, from the tilt lock state to f(θ) ■The seat is tilted relative to the tilt angle (ΔF) between the seat and the gravitational force acting on it, which is detected by the gravitational force tilt detector (6), only when the gravitational force is greater than or equal to a predetermined value (k). Become.

The f(θ)・■2 is the velocity (V) detected by the vehicle speed detector (21) and the change angle (θ) of the vehicle traveling direction detected by the vehicle traveling direction angle detector (22). This is the formula for calculating the centrifugal force applied to .

Specifically, M, ・V2/L-sin(θ) and M2-
It is conceivable that V2/L -tan(θ) (M+, M
2 is a coefficient and L is the wheelbase).

In the above embodiment, both the vehicle speed detector (21) and the vehicle traveling direction angle detector (22) are operated to detect the gravity tilting detector (
6) The gravitational force and tilt detector (
6) may be activated.

In addition, the tilt angle detector or the vehicle traveling direction angle detector (2
Examples of 2) include variable resistors and encoders.

By employing the vehicle speed detector (21) and vehicle heading angle detector (22) in this way, it is possible to make the vehicle appear as if the vehicle was traveling momentarily over slight tilting or uneven road surfaces that would not cause any discomfort to the occupants. In such cases, the seat adjustment device (1) may not be operated.

The reason for this is that if the seat adjustment device (1) is activated every time there is a slight or instantaneous tilting, it may cause discomfort to the occupants, especially when riding on a bumpy road. This is because the seat adjustment device (11) reacts when the vehicle passes through the circuit, and conversely, the seat surface tilts even further in the concave direction when passing over the circuit.

Figure 16 shows the gravity tilting detector (6) and the tilting angle detector ■
, vehicle speed detector (21), vehicle traveling direction angle detector (2
The usage state of the seat surface adjustment device (1) in which all of 2) are adopted is explained with a flowchart.

In this case, the gravitational force tilt detector (6) detects the tilt angle (8T) between the seat and the gravitational force acting on it, as in the embodiment described in FIG.

In the embodiment described above, the seat adjustment device! ! The structure (1) is designed to cope with the tilting of the seat in the left and right direction, but in order to cope with the tilting of the seat in the front and back direction (during rapid acceleration/deceleration), the present invention has been proposed. A gravitational tilt detector (6) can also be appropriately installed on the seat.

Moreover, the seat surface adjustment device (1) according to the present invention can be installed in advance in the vehicle seat, or it can be installed separately from the seat.
When a person such as an elderly person or a child who is vulnerable to vibrations of the vehicle gets on the vehicle, the seat adjustment device (1) may be placed on the existing seat and the person may sit on the seat.

(Effects of the Invention) The present invention comprises a hollow tube and a sensor, the hollow tubes are connected in an endless manner, the vertical tubes are bilaterally symmetrical, and a liquid is sealed inside. Sensors are installed on the left and right tubes in the vertical direction, and the sensors are installed near the surface of the liquid, and when the left and right tubes are upright, the tilt detection target is horizontal and the liquid is subject to acceleration in the horizontal direction. A gravitational tilting detector, a base, a seat forming part, a connecting member, a detector, and a controller, characterized in that the line connecting the sensors and the tilting detection target part are substantially parallel when the sensor is not in use. and a driving means, the seat forming part is a part corresponding to the seat surface of the seat in the vehicle, and the front part is fixed to the base and the rear part is attached to the base via a connecting member, A connecting member is provided between the base and the seat forming part so that the seat forming part can be tilted freely, and the interval between the lower parts of the connecting member is wider than the interval between the upper parts, and the detector is connected to the seat forming part. is installed near the seat forming part to detect the tilting of gravity and transmit it to the controller, and the controller controls the driving means according to the output signal from the detector, and the driving means is connected to the seat forming part and transmits it to the controller. This seat adjustment device for a vehicle seat is characterized in that when a tilting force is detected, a part of the seat is tilted in a direction of 90 degrees with respect to the gravitational force under the control of the controller, so that the following effects can be achieved. play.

Since the gravitational tilt detector is activated by the rise and fall of the liquid level in the hollow tube, it has a simple structure and reliably responds to a predetermined tilt of an object to be detected (for example, the rear of the seat).

In particular, when this gravity tilting detector is installed on a vehicle, it can reliably detect the tilting of the vehicle, and by adjusting the liquid level and sensor installation height, the relationship between the degree of vehicle tilting and the sensor's reaction can be freely controlled. Can be set to

The seat adjustment device for a vehicle seat that uses this detector is configured to tilt only the rear part of the seat forming part, so even if the vehicle tilts, only the rear part of the seat surface that includes the seating reference point is adjusted to the seat. The seat is tilted so that the resultant acceleration is 906, so that the front part of the seat is not forced to tilt, and the passenger's discomfort caused by tilting the entire seat as in the conventional case can be prevented.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the seat adjustment device for a vehicle seat according to the present invention installed in the seat of a vehicle, FIG. 2 is a perspective view of the same seat adjustment device, and FIG. 3 is a perspective view of the vehicle seat adjustment device. FIG. 4(A) is a rear view of the surface adjustment device, FIG. 4(A) is a rear view of the gravity tilting detector according to the present invention, and FIG. 4(B) is a state in which the same detector is tilted and a state in which lateral acceleration is applied. FIG. 5 is a partial side view of a portion of the seat adjustment device centering around the driving means, FIG. 6 is a partial rear view showing a part of the internal mechanism of the driving means, and FIG. 7 is a partial side view of the seat adjustment device according to the present invention. FIG. 8 is a flowchart illustrating the operating sequence of the seat adjustment device for a vehicle seat according to
A) and (B) are front views showing the operating state of the seat adjustment device as described above, and FIGS. 9A and 9B are perspective views showing a second embodiment of the seat adjustment device for a vehicle seat according to the present invention. Side view, FIGS. 10A and 10B are a front view and a side view showing a third embodiment of the upper seat adjustment device, and FIG. 11 is a perspective view showing a fourth embodiment of the upper seat adjustment device. Fig. 12 is a rear view showing a fifth embodiment of the seat adjustment device as above, Fig. 13 is a rear view of the seat adjustment device when a tilt angle detector is also used, and Fig. 14 is a seat surface of the same vehicle seat. 15 is a flowchart explaining the operating order of the vehicle seat seat adjustment device when a vehicle speed detector and a vehicle traveling direction angle detector are used together; FIG. 16 is a flowchart explaining the operating order of the adjustment device; FIG. 17 (A) and 17 (B) are flowcharts illustrating the operating sequence of the seat surface adjustment device of a vehicle seat when an angle detector, a vehicle speed detector, and a vehicle traveling direction angle detector are used together. FIG. 18(A) is a side view showing an example of a conventional vehicle seat, and FIG. 18(B) is a front view of the same vehicle seat. (1) Seat adjustment device (2) Seat seat (3) Base (4) Seat forming part (5) Connecting member (6) Detector (gravity tilting detector) (N (6b)...Hollow tube (6d)...Left tube (6f)...Liquid α0...Controller (6c)...Light sensor - (6e )... old pipe (7)... drive means

Claims (2)

[Claims] (1) It has a hollow tube and a sensor, the hollow tubes are connected in an endless manner, the vertical tubes are symmetrical, and a liquid is sealed inside, and the sensor is connected in the vertical direction. The sensor is installed in the left and right tubes, and the sensor is installed near the surface of the liquid, and when the left and right tubes are upright, the sensor is activated when the tilt detection target is horizontal and the liquid is not subject to acceleration in the horizontal direction. A gravity tilting detector characterized in that a line connecting the two and the tilting detection target portion are in a substantially parallel position. (2) It has a base, a seat forming part, a connecting member, a detector, a controller, and a driving means, and the seat forming part is a part corresponding to the seat of the seat in the vehicle, and the front part is a part that corresponds to the seat of the seat in the vehicle. It is fixed to the base, and the rear part is attached to the base via a connecting member, and the connecting member is provided between the base and the seat forming part so that the seat forming part can be tilted freely, and the connecting member is provided between the lower part of the connecting member. The spacing is wider than the spacing between the upper parts, and a detector is installed near the seat forming part to detect the tilting of gravity and transmit it to the controller, and the controller drives the driving means according to the output signal from the detector. and the driving means is connected to the seat forming part to tilt a part of the seat in a direction of 90 degrees with respect to the gravitational force under the control of the controller when the tilting force of the gravitational force is detected by the detector. A vehicle seat seat adjustment device characterized by: