JP2819138B2 - Headrest control method, headrest control device, and headrest drive mechanism - Google Patents

Description

The present invention relates to a headrest control method for moving a headrest of a rear seat to a storage position by a drive control of a motor by a manual switch operation to secure a rear view of a driver, The present invention relates to a headrest control device and a headrest drive mechanism.

[Conventional technology]

For example, as typified by passenger car seats, headrests are provided at the upper ends of the seat backs of various types of automobile seats. Such a headrest supports the head of the occupant, and in the event of a collision of an automobile, etc., restricts the relative backward movement of the occupant's head with respect to the torso, thereby reducing obstacles at the neck. It has a secure function. Also, in normal times, the headrest keeps the seated person's head safe, thereby helping to ensure an optimal posture without giving a feeling of fatigue.

The headrest is formed integrally with the seatback at the upper end of the seatback and may not be movable,
Generally, through two support rods called stays,
It is movably attached to the upper end of the seat back.

When such a headrest is mounted on, for example, a rear seat, the headrest of the rear seat does not hinder the vehicle during normal traveling. But,
When the vehicle is backed, the headrest at the upper end of the rear seat of the rear seat blocks the driver's rear view and hinders the back running.

In other words, when the driver turns backwards for back traveling, a rear view is obtained with a rear view line connecting the driver's line of sight to the lower edge of the rear window or the edge of the rear hood. However, since the rear seat headrest is located above the rear line of sight,
The rear view is narrowed by the headrest, which makes it difficult to drive safely in reverse.

For this reason, a headrest control method is known in which a driver operates a manual switch, for example, to move the headrest from a support position to a position below a rear line of sight and to store the headrest. According to such a headrest, by operating the manual switch, the headrest of the rear seat is stored below the rear line of sight, so that the backrest does not interfere with the headrest of the rear seat during back traveling.
You can back the car.

[Problems to be solved by the invention]

As described above, in the known headrest control method, when the headrest of the rear seat is stored below the rear line of sight by the driver's manual switch operation during back traveling, the driver can secure the rear field of view.
However, the headrest only rotates between the support position and the storage position, and does not consider the comfort of the occupant in the rear seat. That is, since the seated person on the rear seat cannot adjust the position of the headrest, the desired position cannot be set arbitrarily, and a comfortable sitting posture cannot be obtained.

Further, when the manual switch is operated, the headrest of the rear seat is immediately moved regardless of the presence or absence of a seated person on the rear seat. Therefore, if the headrest moves irrespective of the intention of the occupant of the rear seat due to an erroneous operation of the driver or the like, the occupant may be injured unexpectedly.

The present invention relates to a headrest control method and a headrest control method in which storage and return of a headrest are controlled by storage switch means, and a desired vertical support position and a front-back support position of the headrest can be arbitrarily set by operating a manual switch by a rear seat occupant. It is intended to provide a device and a headrest drive mechanism.

[Means for solving the problem]

In order to achieve this object, according to the headrest control method of the present invention, the headrest is controlled by the forward or reverse rotation of the rotary motor under a one-touch operation of the storage switch means so that the headrest can be viewed from behind the driver. And the support position for supporting the head of the occupant from one side to the other, and rotates together with the stay. Then, the front / rear position of the headrest is adjusted by an arbitrary amount of forward rotation and reverse rotation of the rotation motor in accordance with the manual operation of the corresponding adjustment switch means, and the up / down position of the headrest which can be raised and lowered with respect to the stay is adjusted by the adjustment switch Each is adjusted arbitrarily by the forward and reverse rotations of the lift motor by an arbitrary amount associated with the corresponding manual operation of the means.

〔Example〕

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

As shown in FIG. 1, a headrest control device 10 according to the present invention includes a rotation motor 12, a lifting motor 14, a storage switch device 16, an adjustment switch device 18, and a central processing unit 22, The headrest 24 is configured to be able to store, return, or control the front / rear position and the vertical position of the headrest at the support position.

For example, a DC geared motor can be used as the rotation motor 12 and the lifting motor 14, and the headrest 24 is driven by driving the motors in the forward rotation direction and the reverse rotation direction.
It pivots between the support position and the storage position, or moves up and down at the support position (see FIGS. 3, 4, and 5). The headrest 24 supports, for example, the head of the occupant at the support position shown in FIG. 3, and prevents the head from moving backward in a collision or the like.
In the storage position shown in FIG. 4, the headrest 24 is
It is located below a so-called rear view line 26, which connects the driver's line of sight to the lower edge of the rear window or the edge of the rear hood, and the headrest moves to the storage position to secure the rear view.

As shown in FIG. 1, the storage switch means 16 is provided at a position operable by a driver, for example, an armrest 28 formed integrally with the inner wall of the front door 27, and controls the driving of the rotary motor 12. The storage position and the support position of the headrest 24 can be set with one touch. However, the storage switch means 16 is not limited to the armrest 28, and may be provided on another member, for example, a console box or the like. As the manual switch 17 of the storage switch means 16, for example, an automatic reset type seesaw switch having a neutral position and a contact at two positions can be used. As shown in FIG. Through the connection to the central processing unit 22. When the manual switch 17 is operated, the signal is processed by the interface 29 and output to the central processing unit 22.

The central processing unit 22 is formed with a microcomputer (microcomputer) 30, which processes inputs according to stored programs and generates appropriate control signals. As shown in FIG. 2 in addition to FIG. 1, the control signal is output to, for example, the rotation motor drive circuit 32 to control the driving of the rotation motor 12. For example, when the manual switch 17 is turned on in the storage direction at the support position of the headrest 24, a signal in the storage direction is input to the central processing unit 22. Then, a rotation (reverse rotation) signal in the storage direction of the headrest 24 is output from the central processing unit 22 to the rotation motor drive circuit 32, the rotation motor 12 is driven, and the headrest is rotated from the support position to the storage position. And stored (see FIG. 4).

Here, the manual switch 17 of the storage switch means 16
Are configured in a one-touch manner. That is, for example, when the manual switch 17 is turned on in the storage direction at the position where the headrest 24 is supported, the manual switch holding mechanism (not shown) is activated, and the switch operation is stored. Then, even if the manual switch 17 is turned off while the rotating motor 12 is being driven, the driving of the rotating motor is connected by the holding mechanism. In such a configuration, it is sufficient to turn on the manual switch 17 once, so that the manual switch can be easily operated.

Further, the adjustment switch means 18 is formed, for example, having a front / rear adjustment switch 19 and an up / down adjustment switch 20 (see FIG. 2), and is provided at a position where a seated person can operate the rear seat.
For example, as shown in FIG. 1, it is disposed on an armrest 36 formed integrally with the inner wall of the rear door 34. As the front / rear adjustment switch 19 and the up / down adjustment switch 20, for example,
Like the manual switch 17 of the storage switch means 16,
An automatic return type seesaw switch having a neutral position and a 2-position contact point can be used. However, the present invention is not limited to this. For example, a manual switch 17 of the storage switch means, a front / rear adjustment switch 19 of the adjustment switch means, using an automatic return type push button switch that returns to the initial position when the pressing force is released, Up / down adjustment switch
20 may be configured respectively.

As shown in FIG. 2, for example, the front / rear adjustment switch 19 and the up / down adjustment switch 20 of the adjustment switch means are respectively connected to the central processing unit 22 via an interface 29, and are operated by a person sitting on the rear seat 37. .
When the front / rear adjustment switch 19 and the up / down adjustment switch 20 are operated, respective signals are processed by the interface 29 and output to the central processing unit 22.

For example, when the front / rear adjustment switch 19 is turned on in the front position at the position where the headrest 24 is supported, a signal for forward adjustment is input to the central processing unit 22. Then, a rotation signal in the forward direction of the headrest, that is, a reverse rotation signal is output from the central processing unit 22 to the rotation motor drive circuit 32, and the rotation motor 12 is driven. When the occupant turns off the front / rear adjustment switch 19 at an arbitrary position, the signal is cut off and the rotation motor 12 is stopped, and the headrest between the support position shown in FIG. 24 preferred support positions in the front-back direction are set arbitrarily.

Further, for example, when the up / down adjustment switch 20 is turned on in the support position of the headrest 24 in the upward direction, a signal for the upward adjustment is input to the central processing unit 22. Then, an upward rotation (reverse rotation) signal of the headrest is output from the central processing unit 22 to the lifting motor drive circuit 38, and the lifting motor 14 is driven. When the occupant turns off the up / down adjustment switch 20 at an arbitrary position, the signal is cut off and the elevating motor 14 is stopped, and the up / down movement of the headrest 24 between the support position in FIG. 3 and the adjustment upper limit position in FIG. A preferred support position in the direction is set arbitrarily.

Here, the central processing unit 22, the rotating motor drive circuit 3
2. As shown in FIGS. 1 and 2, the lifting motor drive circuit 38 is connected to a power supply circuit 42 having a constant voltage circuit 40, and is connected to a positive electrode of a battery 46 through an ignition switch 44. It is connected to the.

Further, as shown in FIG. 1, the headrest control device 10 of the present invention is provided with seating detecting means 48 for detecting the presence or absence of a seated person on the rear seat 37. As the seat detection means 48, for example, a seat switch 50 including a pressure sensor can be used, and the seat switch is provided on a seat cushion 52 of the rear seat. And the seat switch 50
Is connected, for example, to the central processing unit 22 via an interface 54 (see FIG. 2).

When the seat switch 50 detects pressure, a signal is output to the central processing unit 22 via the interface 54, thereby detecting the presence of a occupant of the rear seat 37. Then, when a signal from the seat switch 50 is input to the central processing unit 22 and the central processing unit detects seating on the rear seat 37, the signal from the manual switch 17 is shut off as described later, and Only the adjustment switch 19 and the up / down adjustment switch 20 can be operated. In other words, when sitting on the rear seat 37,
Even if a signal is output from the storage switch unit 16 to the central processing unit 22, the headrest 24 is not stored, and the front-back position adjustment or the vertical position adjustment of the headrest at the support position can be performed.

If the seat switch 50 does not detect the pressure, the signals of the front and rear adjustment switch 19 and the up and down adjustment switch 20 are cut off,
Only the operation of the manual switch 17 becomes possible. That is, when there is no occupant in the rear seat 37, even if signals are output from the front / rear adjustment switch 19 and the up / down adjustment switch 20 of the adjustment switch means to the central processing unit 22, the headrest 24 is not adjusted, and the headrest is stored. Only the return to the support position is possible. Here, the seat detection means
The switch 48 is not limited to the seat switch 50 including a pressure sensor, and may be configured by using, for example, a photo sensor.

The headrest drive mechanism 56 for rotating and raising and lowering the headrest 24 is generally configured as follows.

The headrest 24 is connected to the seat back 60 via a pair of stays 58, as can be seen from FIGS. The stay 58 is formed, for example, of a pipe or the like, and the lower end thereof is inserted into a pair of stay holders 64 fixed to the shaft 62. For example, the stay holder, a substantially Ω-shaped snap 66 to a cut groove 65 of the stay are formed. The stay is fixed to the stay holder by the fitting. The shaft 62 is rotatably mounted between a pair of brackets 68 fixed to the seat back 60. For example, one end is connected to the output shaft of the drive motor 12 that rotates the headrest 24. . The rotation motor 12 is fixed to the seat back 60 via a motor bracket 69, for example. Further, a slit 70 through which the stay 58 is inserted and which allows the stay to move in the front-rear direction is provided at the upper end of the skin of the seat back 60 over the range of movement of the stay.

In such a configuration, the rotation motor 12 drives
The shaft 62 is rotated, and the headrest is moved together with the shaft.
24 is rotated. For example, when a reverse rotation signal is output from the central processing unit 22 to the rotation motor drive circuit 32 at the support position of the headrest 24 as shown in FIG.
The rotation motor 12 is driven in the reverse rotation direction with the shaft 62. Then, the headrest 24 is tilted forward by the rotation of the shaft 62, and as shown in FIG. 4, the headrest 24 is rotated below the driver's rear line of sight 26 and retracted.

In addition, when the central processing unit 22 outputs a forward rotation signal to the rotation motor drive circuit 32 in the storage position shown in FIG. 4, the rotation motor 12 is driven in the forward rotation direction. Then, by the driving of the rotation motor 12, the headrest 24 is rotated clockwise together with the shaft 62, and as shown in FIG. 3, the headrest 24 is rotated to a supporting position where the head of the seated person can be supported.

Here, the rotation range of the headrest 2 is limited, and the rotation motor
It is preferable to provide a rotation limit switch 72 for stopping the 12 (see FIG. 6). As the rotation limit switch 72, for example, a push-type switch can be used. The rotation limit switch is fixed to, for example, a bracket 68, and can be pressed at a supporting position of the headrest 24 or at a storage limit position. Pins 74a and 74b are provided on the shaft 62. Then, as can be seen from FIG. 2, the rotation limit switch 72 is, for example,
It is connected to the central processing unit 22 via an interface 76.

The rotation limit switch 72 is normally turned off, and when either of the pressing pins 74a, 74b is pressed, the limit switch is turned on, and the signal is output to the central processing unit 22. Then, a stop signal is output from the central processing unit 22 to the rotation motor drive circuit 32, and the rotation motor 12 is immediately stopped, so that excessive rotation of the headrest 24 is prevented. The rotation limit switch 72 is not limited to a push-type switch, and may be configured using other various switches.

As shown in FIG. 3 to FIG.
14 is built into the headrest 24. Lifting motor 14
Is fixed via a motor bracket 80 to a base bracket 78 fixed to the upper end of the stay 58, for example. The base bracket 78 is formed, for example, in a substantially U-shape, and one end of a pair of parallel links 82, 84 is rotatably supported on both sides by, for example, a rotation pin 86. The rotation pin 86 is attached by an E-ring or the like. For example, the parallel link 82 is formed to have, at one end, a sector gear 90 that meshes with a pinion gear 88 of the output shaft of the elevating motor 14. The other ends of the parallel links 82 and 84 are
The connecting pipe 92 is fixedly connected to both ends of the connecting pipe 92 so as to be interlocked therewith, and is rotatably attached to the front bracket 96 by a connecting pin 94. As can be clearly seen from FIG.
Has a head 94a, from one side of the front bracket 96, through the insertion holes 97, 98, is inserted into the connection pipe 92, and to the extension portion that extends outward on the other side, for example, The E-ring 100 is fitted through the washer 99 and is supported so that it cannot be removed.

Then, the front half 10 of the cover forming the main body of the headrest 24 is attached to the mounting method 102 of the front bracket.
4. The rear half 106 is fixed with screws or the like, and the headrest body is covered with the pad 108 and the skin 110 to form a headrest. (See FIG. 3). Here, the rear half 106 is
A notch 107 is provided at the lower part to prevent the headrest 24 from coming into contact with the stay 58 when the headrest 24 moves up and down. Also,
The electric wiring of the elevating motor 14 is protected by a protection member such as a harness, and is inserted into the stay 58 and wired.

In such a configuration, when the elevating motor 14 is driven, the parallel links 82 and 84
6 and the front bracket 96, that is, the headrest
24 is raised and lowered with respect to the stay 58. For example, when a reverse rotation signal is output from the central processing unit 22 to the lift motor drive circuit 38 at the support position below the headrest 24 as shown in FIG. 3, the lift motor 14 is driven in the reverse rotation direction. You. Then, the pinion gear 88 rotates counterclockwise with the driving of the elevating motor 14, and the sector gear 90
At the same time, the parallel links 82 and 84 are rotated clockwise, and the headrest 24 is raised with respect to the stay 58 as shown in FIG.

When a positive rotation signal is output from the central processing unit 22 to the lifting motor drive circuit 38 at a position above the headrest 24 as shown in FIG. 5, the lifting motor 14 is driven in the forward rotation direction. Then, the pinion gear 88 rotates clockwise with the driving of the elevating motor 14, and the parallel links 82, 84 are rotated counterclockwise via the sector gear 90, so that the headrest 24 moves relative to the stay 58. Descended.

Here, it is preferable to provide a lifting / lowering limit switch 112 for limiting the lifting / lowering range of the headrest 24 in the same manner as the rotation limit switch 72 (see FIG. 6). The lifting / lowering limit switch 112 is provided at the upper limit position and the lower limit position of the headrest 24, for example, at the upper and lower mounting pieces 10 of the front bracket 96.
2 is fixed to the base bracket 78 so that the limit switch can be pressed. However, the present invention is not limited to this, and a configuration in which the lifting / lowering limit switch 112 can be pressed by another member may be adopted. And the lifting limit switch 11
2 is connected to the central processing unit 22 via the interface 114, for example, and
When it is turned on by being pressed by 2, a stop signal is output from the central processing unit to the lift motor drive circuit 38. Then
The elevating motor 14 is immediately stopped to prevent the headrest 24 from being excessively raised and lowered with respect to the stay 58.

It is preferable that the headrests 24 having the above-described configurations are separately formed on the left and right sides of the rear seat 37, and the left and right headrests are individually controlled by the individual headrest control devices 10. However, the present invention is not limited to this, and the left and right headrests may be integrally moved. Further, in the headrest control device 10 having the above configuration, for example, the central processing unit 22, the rotating motor drive circuit 32, and the elevating motor drive circuit 38 are housed in the control box 116, and the control box is, for example, a seat back 60 of a rear seat. (See FIG. 1).

A headrest control method by the headrest control device 10 having the above configuration will be described in detail with reference to the flowchart of FIG.

First, the main switch of the headrest control device 10 is turned on. Normally, the ignition switch 44 also functions as a main switch. When the driver sits down and turns on the ignition switch, the main switch is automatically turned on (120). Then, it is determined whether the seating switch 50 of the seating detecting means is ON (121).

Here, for example, assuming that there is a occupant in the rear seat 37, the occupant switch 50 of the occupant detection means detects the pressure of the occupant and turns on. Then, since the seat switch 50 is on, it is determined YES in (121). And the up / down adjustment switch of the adjustment switch means 18
It is determined whether the upward direction of 20 is on (122) and the downward direction is on (123). At this time, when one is turned on, the other is turned off. Next, it is determined whether or not the front direction of the front / rear adjustment switch 19 is ON (12
4), it is determined whether or not the rear direction is ON (125).

For example, assuming that the up / down adjustment switch 20 is turned on upward and the front / rear adjustment switch 19 is not operated in order to adjust the up / down position of the headrest 24 at the support position,
(122) is determined as YES, and the elevation limit switch
It is determined whether 112 is on in the reverse rotation direction of the lifting motor 14 (126). Then, in (126), if it is determined that the drivable motor 14 is drivable in an off state, that is, if NO, the elevating motor is driven in the reverse rotation direction (127).
Here, since the front / rear adjustment switch 19 is not operated,
In (124) and (125), both are determined to be NO.
Further, since the rotation motor 14 is not driven and the holding mechanism is not operated, both are determined to be NO (128), (1)
29).

Then, when the elevating motor 14 is driven in the reverse rotation direction, the headrest 24 is raised to the upper limit position, and the elevating limit switch 112 is turned on, YES is determined in (126). Then, it is determined whether or not the elevating motor 14 is driven (130). Since the elevating motor is driven, YES is determined, and the elevating motor is stopped (131). If the occupant turns off the vertical adjustment switch 20 at an arbitrary position before the elevation limit switch 112 is turned on, (12
Since NO is determined in 2) and YES is determined in (130), the elevating motor 14 is stopped (131), so that the headrest 24 can be set to an arbitrary supporting position in the vertical direction.

When the up / down adjustment switch 20 is turned on downward,
YES is determined in (123). Then, if NO is determined while the lifting / lowering limit switch 112 is off (13)
2) The lifting motor 14 is driven in the forward rotation direction until the lifting limit switch is turned on and YES is determined (13).
3). The headrest 24 is lowered to the lower limit position, and the lifting / lowering limit switch 112 is turned on. When (YES) is determined in (132), the driving of the lifting / lowering motor 14 is determined in (130). Is stopped (131). Also, before the lifting / lowering limit switch 112 is turned on, the occupant
If 20 is turned off, NO is determined in (123) and YES is determined in (130). Then, the elevating motor 14 is stopped (131), so that the headrest 24 can be set at an arbitrary supporting position in the vertical direction.

For example, assuming that the front / rear adjustment switch 19 is turned on and the up / down adjustment switch 20 is not operated to adjust the front / rear position of the headrest 24 at the support position, (122), (123), (130) ) Are determined to be NO. Then, YES is determined in (124),
It is determined whether the rotation limit switch 72 is turned on in the reverse rotation direction of the rotation motor 12 (134). And (13
If NO is determined in 4), the rotation motor 12 is driven in the reverse rotation direction until the limit switch is turned on and YES is determined (135).

Then, when the rotation motor 12 is driven in the reverse rotation direction, the headrest 24 is rotated to the front end position for front-rear adjustment, and the rotation limit switch 72 is turned on in the reverse rotation direction, (13)
4) is determined as YES. Then, in (128), it is determined whether or not the rotation motor 12 is being driven.
If YES is determined in (128), the rotary motor is stopped (136). Further, before the turning limit switch 72 is turned on, the occupant can move the front-rear adjustment switch 19 at an arbitrary position.
Is turned off, NO is determined in (124), and (12)
8) is determined to be YES, and the rotation motor 12 is stopped (136), so that the headrest 24 can be set to an arbitrary supporting position in the front-rear direction.

When the front / rear adjustment switch 19 is turned on backward,
NO is determined in (124) and YES is determined in (125). Then, when the rotation limit switch 72 is turned off in the normal rotation direction, that is, when it is determined to be NO (137), the rotation limit switch is turned on and until it is determined to be YES.
The rotation motor 12 is driven in the forward rotation direction (138). The headrest 24 rotates to the rear limit position, the rotation limit switch 72 is turned on, and if YES is determined in (137), the drive of the rotation motor 12 is determined in (128), and Y
It is determined as ES, and the rotation motor is stopped (136). Also, if the occupant turns off the vertical adjustment switch 19 at an arbitrary position before the rotation limit switch 72 is turned on,
Since NO is determined in (125) and YES is determined in (128), and the rotation motor 12 is stopped (136), the headrest 24 can be set to any supporting position in the front-rear direction.

When there is no occupant in the rear seat 37, the seating switch 50 is turned off, and the determination at (121) is NO, so that the control signals from the front / rear adjustment switch 19 and the up / down adjustment switch 20 are cut off, and The front and rear position adjustment and the vertical position adjustment of the headless 24 cannot be performed. Then, it is determined whether the manual switch 17 of the storage switch means is ON in the storage direction (139) and whether it is ON in the return direction (140). For example, when the manual switch 17 is turned on in the storage direction, YES is determined in (139), and the holding mechanism is turned on in the storage direction (141). Then (134)
It is determined whether or not the rotation limit switch 72 is turned on in the reverse rotation direction. If the rotation limit switch 72 is turned off, that is, if NO, the rotation motor is turned on until the rotation limit switch is turned on.
12 is driven in the reverse rotation direction (135).

With the continuous drive of the rotation motor 12 in the reverse rotation direction, the headrest 24 is rotated to the storage position, the rotation limit switch 72 is turned on, and if YES is determined in (134), then YES is determined in (128). Is determined, the driving of the rotating motor 12 is stopped (136). Then, since the holding mechanism is turned on in (141), YES is determined in (129) and the holding mechanism is turned off (142).

Here, if the manual switch 17 is turned on and the rotary motor 12 is driven, and then the manual switch is turned off, the determination in (139) is NO. However, since the holding mechanism is operating, YES is determined in (143), and the rotating motor 12 is continuously driven.

Also, when the manual switch 17 is turned on in the return direction for return in the storage position of the headrest 24,
It is determined to be YES in (140), and the holding mechanism is turned on in the return direction (144). Then, in (137), it is determined whether or not the rotation limit switch 72 is on in the forward rotation direction. If the rotation limit switch 72 is off, that is, if it is determined as NO, the rotation motor 12 is turned on until the rotation limit switch is turned on. Are continuously driven in the forward rotation direction (138). The headrest 24 is rotated to the support position, the rotation limit switch 72 is turned on, and if YES is determined in (137), YES is determined in (128) and the driving of the rotation motor 12 is stopped. (136). Then, since the holding mechanism is turned on in (144), YES is determined in (129), and the holding mechanism is turned off (142).

Here, if the manual switch 17 is turned on and the rotary motor 12 is driven, and then the manual switch is turned off, the determination in (140) is NO. However, since the holding mechanism is operating, YES is determined in (145), and the rotating motor 12 is continuously driven.

As described above, according to the headrest control method of the present invention, in addition to storing and returning the headrest 24 by operating the manual switch 17 of the storage switch means, operating the front / rear adjustment switch 19 and the up / down adjustment switch 20 of the adjustment switch means , The front and rear position adjustment and the vertical position adjustment of the headrest at the support position can be arbitrarily performed. As a result, the driver's rear view is secured and the rear seats 37
For the occupant, the front / rear adjustment switch 19 and the up / down adjustment switch
By the manual operation of 20, the desired supporting position of the headrest 24 can be set arbitrarily, a good sitting posture can be easily obtained, and the safety and comfort are sufficiently improved.

In the configuration provided with the seating detecting means 48, the presence or absence of a seated person on the rear seat 37 is detected by the seating switch 50 of the seating detecting means, and the manual switch is
17, the signals of the front / rear adjustment switch 19 and the up / down adjustment switch 20 are controlled. In other words, if there is a occupant in the rear seat 37, the signal from the manual switch 17 is shut off, and only the front / rear position adjustment and the vertical position adjustment of the headrest 24 in the support position by operating the front / rear adjustment switch 19 and the up / down adjustment switch 20 It is possible. If there is no occupant in the rear seat 37, the signals from the front / rear adjustment switch 19 and the up / down adjustment switch 20 are cut off, and only the storage and return of the headrest 24 by operating the manual switch 17 are enabled. Therefore, even if the driver mistakenly operates the manual switch 17 when there is a seated person in the rear seat 37, the headrest 24 is not retracted, and the seated person does not feel uneasy.

Although the embodiment is embodied as a four-door type vehicle having a rear door, the invention is not limited to this. For example, the headrest 24 of the present invention is mounted on a rear seat of a two-door type vehicle, It may be configured to be controlled by the control device 10.

Further, in the embodiment, the headrest 24 mounted on the passenger car is controlled by the headrest control device 10. However, although it is suitable for a passenger car, the present invention is not limited to this. For example, it may be mounted on a van or the like.

In the case of a vehicle such as a van, which frequently places luggage on the rear seat 37, a switch means that allows the driver to set the on / off state of the seat detection means arbitrarily besides the detection by the seat detection means 48 of the rear seat. For example, the storage switch means 16 may be provided. In such a configuration,
For example, even if the seating detecting means 48 detects a load placed on the rear seat 37 and turns on, if the driver turns off the switch means, the headrest 24 can be stored. Then, in this case, when the driver operates the switch means to arbitrarily turn off the seat detection means 48 and the seated person sits on the rear seat 37, the detection operation by the seat detection means is performed. It is preferable that switch means for the seated person to turn on the seat detection means be provided in the adjustment switch means 18, for example.

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

〔The invention's effect〕

As described above, according to the headrest control method according to the present invention, in addition to storing and returning the headrest by one-touch operation of the storage switch means, adjustment of the front / rear position of the headrest at the support position by operation of the adjustment switch, vertical position Adjustment is possible. As a result, the driver's rear view can be smoothly and easily secured without complicating the operation, and the operability is improved, and the occupant of the rear seat can manually support the headrest by manually operating the adjustment switch means. The position can be set arbitrarily, and a good sitting posture excellent in safety and comfort can be easily obtained.

In addition, if the possible operation of the headrest can be switched appropriately according to the presence or absence of the occupant of the rear seat, the occupant of the rear seat does not feel uneasy. Comfort and driver operability are improved.

And according to the headrest control device of the present invention,
The above-described headrest control method can be appropriately performed, and the headrest can be stored and returned by one-touch operation, and any adjustment of the front and rear support position and the vertical support position of the headrest can be performed. Operability and operability are improved.

Further, in the configuration in which the left and right headrests can be individually operated, the left and right occupants can arbitrarily adjust the support positions of the headrests, respectively, and the optimal support position of each occupant can be easily obtained.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a headrest control device according to the present invention, FIG. 2 is a detailed block diagram centering on a central processing unit, FIG. 3, FIG. 4, and FIG. position,
FIG. 6 is a partially exploded perspective view of the drive mechanism of the headrest, partially broken away, at the storage position and the support upper limit position, and FIG. 7 is a flowchart of a headrest control method according to the present invention. 10: headrest control device, 12: rotating motor, 14: elevating motor, 16: retract switch means, 17: manual switch,
18: adjustment switch means, 19: front / rear adjustment switch, 20: up / down adjustment switch, 22: central processing unit, 24: headrest, 26: rear view line, 30: microcomputer, 32: rotating motor drive circuit, 38: lifting motor drive circuit, 48: seat detection means, 50: seat switch, 56: headrest drive mechanism, 62: shaft, 72: rotation limit switch, 82, 84: parallel link, 88: pinion gear, 90: sector gear , 112: lifting limit switch.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-119706 (JP, A) JP-A-62-128842 (JP, A) JP-A-63-115837 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) B60N 2/48

Claims (6)

(57) [Claims] 1. The method according to claim 1, wherein one of a rotation of the rotary motor under a one-touch operation of the storage switch means a forward rotation or a reverse rotation.
The headrest continues to rotate in one direction from one of the storage position to secure the driver's rear view and the support position to support the seated person's head from one side to the other, and the front and rear positions of the headrest are The vertical position of the headrest, which can be raised and lowered with respect to the stay, is changed by the corresponding manual operation of the adjustment switch means by the arbitrary rotation of the rotation motor in the normal rotation and reverse rotation accompanying the manual operation of the corresponding adjustment switch means. A headrest control method in which each of the headrest control is arbitrarily adjusted by an arbitrary amount of forward rotation and reverse rotation of the lifting motor. 2. A headrest is moved together with a stay in one direction from one of the storage position and the support position by operating the storage switch means only when there is no occupant in the rear seat. The headrest is rotated forward and backward, and the headrest is moved up and down with respect to the stay by operating the adjustment switch means only when there is a seated person. The headrest control method according to claim 1, wherein the positions can be adjusted arbitrarily. 3. A stay provided at an upper end of a seat back of a rear seat via a stay, and is rotatable together with the stay between a support position for supporting a seated person's head and a storage position below a rear view line of a driver. A headrest that can move up and down with respect to the stay at the support position; a rotation motor that rotates the stay together with the headrest; an elevating motor that moves the headrest up and down with respect to the stay; A rotation motor drive circuit, a lift motor drive circuit for a lift motor, and a driver drive operable position. The headrest is supported and stored by continuously rotating the rotation motor in a corresponding direction. One-touch retract switch that continuously rotates in one direction from one side to the other, and allows the occupant to operate the rear seat Adjustment switch means for controlling the driving of a rotation motor and a lifting / lowering motor, respectively, for manual adjustment of the front / rear position and the vertical position of the headrest at the support position, and rotation for limiting the rotation range of the headrest A limit switch, an elevating / lowering limit switch for limiting an elevating range of the headrest, processing input information according to a predetermined program, outputting a control signal to a rotating motor driving circuit, an elevating motor driving circuit, A central processing unit for controlling the drive of the elevating motor, wherein the headrest moves the storage position and the support position by either forward rotation or reverse rotation of the rotating motor under one-touch operation of the storage switch means. Continue to rotate with the stay to the corresponding position, and rotate the motor with the manual operation of the adjustment switch. ,
The forward / backward rotation of the headrest with the stay and the lifting / lowering of the headrest with respect to the stay are performed by an arbitrary amount of normal rotation and reverse rotation of the lifting / lowering motor, whereby the front / back position and the vertical position of the headrest can be adjusted arbitrarily. Headrest control device. 4. A headrest storage position and a support position setting by a storage switch corresponding to presence / absence of a seated person by a seating detection unit for detecting presence / absence of a seated person in the rear seat. 4. The headrest control device according to claim 3, wherein one of an operation and an operation of adjusting a support position of the headrest by the adjustment switch means is enabled. 5. The headrest control device according to claim 3, wherein the left and right headrests are individually operable. 6. A headrest provided with a pair of stays at a lower end thereof, and a pair of stay holders into which the stays of the headrest are inserted, and are rotatably mounted between a pair of brackets fixed to the seat back. A shaft driven by a rotating motor, a sector gear disposed in the headrest and meshable with a pinion gear of the elevating motor at one end, and the other end is operably connected by a connecting shaft to one end. A pair of parallel links having the other end rotatably attached to the base bracket fixed to the stay, respectively, and a headrest by rotating the shaft.
A headrest drive mechanism that is configured to be rotatable in the front-rear direction with respect to a seat back, and is configured to be able to move up and down with respect to a stay by rotating a parallel link.