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EP0082664A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

An automatic seat positioning device for a vehicle driver seat

Assignee: Nissan Motor Co Ltd
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Filing: 1982-12-14
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Granted: —
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Expires: 2002-12-14
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Abstract

Abstract An automatic seat positioning device for a vehicle driver's seat wherein a reversible motor (10) is engaged with one of a plurality of electro-magnetic clutches (11a to 11f) and rotates so that an associated seat member actuating mechanism moves one of the seat members to a desired position for a specific driver from an initial position upto a maximum position. In such an automatic seat positioning device of the construction described above, a seat position detector (101a to 101f) corresponding to the seat member detects that the seat member has arrived at a specific position at which the detector is located and a preset control circuit presets a counter, which normally provides an indication of the position of the seat member by counting the number of rotations of the motor, to a value corresponding to the number of rotations of the motor by which the seat member is moved from an initial starting position to the specific position. In this errors of the counter due to slip i which occurs whenever the motor is started and stopped, and engaged with the electromagnetic clutch will be cancelled. In addition, the automatic seat positioning device stores the positional data of the seat member set at the desired position from the counted value of the counter in a memory provided therewith in order to return the current set position of the seat member to an originally set position on a basis of the stored data. A memory correction circuit (104, Figure 3) may be provided which corrects an erroneous stored data to an accurate value corresponding to the actual poisition in response to the setting of a counter (103) according to the number of times by which a manual switch which energizes the motor in a normal or reverse direction is operated. Therefore, the seat member can be more accurately returned to the originally set position.

Inventors

  • 👤 Hitoshi Takeda
  • 👤 Hidetaka Suzuki
  • 👤 Ken Kamijo
  • 👤 Hideyuki Nagashima

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 16:52
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/02; B60N2/0224; B60N2/02246; B60N2/0244; B60N2/0248

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 357 words
An automatic seat positioning device for a vehicle driver's seat, comprising: (a) a seat actuating mechanism including a reversible motor, a plurality of actuators each located within corresponding seat member of said seat for actuating associated seat member of said seat to move to a desired position in a normal or reverse direction within an adjustable range specified depending on the associated seat member, a plurality of electromagnetic clutches each operatively engageable with the motor for transmitting a rotating force of the motor to the corresponding seat member toward the desired position, and a motor drive circuit, having a plurality of manual reversible switches each provided for the adjustable direction of the individual seat members, which engages one of said electromagnetic clutches with said motor depending on which of said manual reversible switches is activated to specify the adjustable direction of the associated seat member; (b) a seat position control circuit connected to the reversible motor and motor drive circuit of said seat actuating mechanism having a plurality of reversible counters each counting the number of rotations of said reversible motor for detecting the position of the associated seat member, along the corresponding adjustable direction, storage means operatively storing the counted value of each reversible counter and actuating means .operatively actuating said motor drive circuit to rotate in the normal or reverse direction on a basis of the stored seat positional data when the seat position is changed to return to an originally set position; (c) a preset control means which operatively clears and presets each of the counted values of said reversible counters of said seat position control circuit to a preset value so that the corresponding reversible counter indicates an actual position of the associated seat member; and (d) a plurality of absolute position detection means each located at a position between a maximum adjustable limit and initial position from which the corresponding seat member is moved in one adjustable direction which notifies said preset control means that the associated seat member arrives at the installed position thereof so that said preset control means clears and presets the corresponding reversible counter to the preset value.
Claim 2
Dependent Claim 357 words
An automatic seat positioning device for a vehicle driver's seat, comprising: (a) a seat actuating mechanism including a reversible motor, a plurality of actuators each located within corresponding seat member of said seat for actuating associated seat member of said seat to move to a desired position in a normal or reverse direction within an adjustable range specified depending on the associated seat member, a plurality of electromagnetic clutches each operatively engageable with the motor for transmitting a rotating force of the motor to the corresponding seat member toward the desired position, and a motor drive circuit, having a plurality of manual reversible switches each provided for the adjustable direction of the individual seat members, which engages one of said electromagnetic clutches with said motor depending on which of said manual reversible switches is activated to specify the adjustable direction of the associated seat member; (b) a seat position control circuit connected to the reversible motor and motor drive circuit of said seat actuating mechanism having a plurality of reversible counters each counting the number of rotations of said reversible motor for detecting the position of the associated seat member, along the corresponding adjustable direction, storage means operatively storing the counted value of each reversible counter and actuating means .operatively actuating said motor drive circuit to rotate in the normal or reverse direction on a basis of the stored seat positional data when the seat position is changed to return to an originally set position; (c) a preset control means which operatively clears and presets each of the counted values of said reversible counters of said seat position control circuit to a preset value so that the corresponding reversible counter indicates an actual position of the associated seat member; and (d) a plurality of absolute position detection means each located at a position between a maximum adjustable limit and initial position from which the corresponding seat member is moved in one adjustable direction which notifies said preset control means that the associated seat member arrives at the installed position thereof so that said preset control means clears and presets the corresponding reversible counter to the preset value.
Claim 3
Dependent Claim 44 words
The automatic seat positioning device of claim 1, wherein said preset value of said preset control means is a rotational number of said reversible motor which takes for the corresponding seat member to arrive at the installed position along the corresponding adjustable direction thereof.
Claim 4
Dependent Claim 105 words
' 3. The automatic seat positioning device of claim 1, which further comprises: (a) a plurality of unidirectional counters each connected to said corresponding manual reversible switch and each of which counts the number of times the associated manual switch has been activated in the normal or reverse direction; and (b) a memory correction means which corrects the stored counted value from each reversible counter in said storage means according to the counted value of said unidirectional counter which corresponds to the adjustable direction of the associated seat member in response to the preset of said reversible counter by means of said preset control means.
Claim 5
Dependent Claim 117 words
The automatic seat positioning device of claim 3, wherein the counted value of each of said unidirectional counter is stored into the same address of said storage means as the counted value of said corresponding reversible counter for each of the adjustable directions of the seat members and wherein said memory correction means calculates a first difference between the current counted value of said corresponding unidirectional counter and the stored counted value, calculates a second difference between the current counted value of said corresponding reversible counter and preset value of said preset control means, and corrects the stored counted value according to the magnitude of said first difference result on a basis of said second difference result.
Claim 6
Dependent Claim 56 words
The automatic seat positioning device of claim 4, wherein said memory correction means corrects the stored counted value of said corresponding, reversible counter so that a correction amount according to said second difference result becomes decreased stepwise as said first difference result becomes larger by dividing the magnitude of said first difference result into four classes.

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