JP2017154650A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide relaxation effect to a sitting occupant by providing a plurality of combined vibration to a vehicular seat so as to generate "wave phenomenon" based on difference in vibration cycle of them.SOLUTION: The vehicular sheet comprises a plurality of seat position adjusting means A, B respectively performing positional adjustment of a plurality of part in a seat 1 constituting a seat and a cycle adjusting means C which periodically adjusts the plurality of seat position adjusting means A, B using each criterion position as center at a predetermined change range and in which each adjustment cycle of each of the seat position adjusting means A, B is made to be different from each other. In addition, adjustment cycle between each seat position adjusting means A, B has a relationship generating "wave phenomenon" by the difference.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a passenger seat for mounting on a vehicle such as an automobile, an airplane, a ship, and a train.

  In Patent Document 1 below, a seat position for a vehicle that is used to achieve an appropriate seating posture is used as a reference position, and the seat position is periodically adjusted with a predetermined change width around the reference position, so that an occupant An apparatus for reducing the fatigue of the body is shown.

Japanese Patent No. 2768089

  Recently, there is a demand for a vehicle occupant to be able to go to sleep in a short time in a situation where he wants to take a nap in the vehicle. Even if the vehicle seat of Patent Document 1 is effective in reducing fatigue, it cannot be expected to induce the passenger to sleep.

  In view of such problems, an object of the present invention is to provide a relaxing effect to a seated occupant by applying a combination of a plurality of vibrations to a vehicle seat and causing a “beating phenomenon” based on the difference between the vibration periods. There is.

  A vehicle seat according to a first aspect of the present invention includes a plurality of seat position adjusting means for adjusting the positions of a plurality of portions in a seat constituting the seat, and the plurality of seat position adjusting means with a predetermined change width centered on each reference position. And a period adjusting means in which each adjusting period of each sheet position adjusting means is made different from each other. The adjustment periods of the respective seat position adjusting means have a relationship that causes a “beating phenomenon” due to the difference.

  In the first invention, the plurality of sheet position adjusting means are ones in which mutual adjustment operations directly or indirectly affect each other, and various combinations of sheet positions can be applied. For example, it can be a combination of a lifter that adjusts the height of the seat cushion that forms the seat and a tilt adjusting means that adjusts the height of the front end of the seat cushion. Further, the tilt adjusting means and the recliner for adjusting the inclination angle of the seat back with respect to the seat cushion can be used. Furthermore, a combination of an ottoman and a recliner that supports the leg portion of the seated occupant in front of the seat cushion so that the height thereof can be adjusted is possible. However, the plurality of sheet position adjusting means is not limited to these combinations.

  In the first invention, a motor, a fluid pressure actuator, or the like can be applied as a driving source for adjusting each seat position. Further, the adjustment period in the period adjustment unit may be arbitrarily changed. Furthermore, the adjustment amplitude in the period adjusting means may be constant at all times, or may be changed in a certain period. Furthermore, the adjustment amplitude in the period adjusting means may be arbitrarily changed.

  According to the first aspect of the present invention, the plurality of sheet position adjusting means are periodically adjusted with a predetermined change width around the reference position at different periods, thereby causing a “beating phenomenon” between the plurality of sheet positions. Therefore, a plurality of seat positions vibrate at the same time, and at the same time, a “beating phenomenon” occurs between the plurality of seat positions, and a seating occupant can be relaxed. In addition, the occurrence of the “beat phenomenon” can be performed using existing sheet position adjusting means without adding a new device.

  According to a second invention, in the first invention, the plurality of sheet position adjusting means includes a motor as a drive source for adjusting the sheet position.

  According to the second invention, the sheet can be moved in a wide range, not locally, by the motor. Therefore, the stimulus to the seated occupant becomes gentle and the relaxation effect can be enhanced.

  According to a third aspect, in the first aspect, the plurality of seat position adjusting means includes an air bag that is inflated and deflated by air pressure as a driving source for adjusting the seat position.

  According to the third invention, the seat position can be adjusted by the air bag.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, a relationship between one of the plurality of sheet position adjusting means and the other one is adjusted by one sheet position adjusting means. As a whole, a portion of the sheet that is adjusted by another sheet position adjusting means is a part of the whole.

  In the fourth invention, when one seat position adjusting means is a lifter for adjusting the height of the seat cushion constituting the seat, the other one seat position adjusting means adjusts the height of the front end portion of the seat cushion. Tilt adjusting means can be used. When one seat position adjusting means is a slider for adjusting the front and rear position of the seat cushion, the other one seat position adjusting means can be a lifter. Furthermore, when one seat position adjustment means is a recliner that adjusts the inclination angle of the seat back of the seat back that forms the backrest, the other seat position adjustment means adjusts the pressing strength to the waist of the seated occupant. Can be lumbar support. However, the plurality of sheet position adjusting means is not limited to these combinations.

  According to the fourth aspect of the invention, the part of the sheet adjusted by one sheet position adjusting unit is vibrated as a whole at the adjustment cycle of one sheet position adjusting unit. Further, the part of the sheet adjusted by the other sheet position adjusting unit is combined with the adjustment cycle of one sheet position adjusting unit and the other sheet position adjusting unit, and vibrates with the combined cycle and amplitude. As a result, a “beat phenomenon” occurs. For this reason, the seated crew is given a relaxing effect due to the “beating phenomenon”.

  According to a fifth invention, in any one of the first to fourth inventions, one of the plurality of seat position adjusting means is a lifter for adjusting a height of a seat cushion constituting the seat portion, and the other one is The tilt adjusting means adjusts the height of the front end of the seat cushion. And the adjustment period of the tilt adjusting means is made longer than that of the lifter.

  According to the fifth aspect of the invention, the rear portion of the seat cushion is vibrated at the lifter adjustment cycle. Further, the front end portion of the seat cushion is combined with the adjustment periods of the lifter and the tilt adjusting means, and is vibrated with the combined period and amplitude, thereby generating a “beating phenomenon”. Therefore, while the seated occupant is subjected to vibrations of a relatively small period, the front part is vibrated at a relatively large period due to the “beating phenomenon” around the rear part of the whole body, and a relaxing effect is given.

It is a block diagram of a 1st embodiment of the present invention. It is an electric circuit diagram of a 1st embodiment. It is a flowchart which shows the program content of the microcomputer of 1st Embodiment. It is a time chart for demonstrating adjustment of 1st Embodiment. It is explanatory drawing explaining operation | movement of the seat position adjustment of 1st Embodiment. It is a schematic diagram explaining the operation | movement of sheet position adjustment of 1st Embodiment. It is a time chart for demonstrating operation | movement of 1st Embodiment. 3 is a time chart for explaining a “beat phenomenon” of the first embodiment. It is an electric circuit diagram of a 2nd embodiment of the present invention.

  FIG. 1 shows a first embodiment of the present invention. This embodiment shows an example in which the present invention is applied to an automobile seat (hereinafter simply referred to as a seat). The seat 1 is formed by fixing a seat back forming a backrest to a rear end portion of a seat cushion 2 forming a seat portion.

  As shown in FIG. 5, the position of the seat cushion 2 can be adjusted in the front-rear direction (indicated by the arrow SL) with respect to the automobile floor by a slider. Further, the position of the seat cushion 2 can be adjusted in the vertical direction (indicated by an arrow LF) by a lifter. Further, the front end portion of the seat cushion 2 can be adjusted in the vertical direction (indicated by the arrow TL) by the tilt adjusting means. Although not shown, an ottoman that lifts and supports the legs of the seated occupant may be provided at the front end of the seat cushion 2.

  Note that when the seat cushion 2 is moved back and forth by the slider, the entire seat cushion 2 is moved back and forth. Further, the vertical movement of the seat cushion 2 by the lifter moves only the upper part of the seat cushion 2 up and down. Further, the vertical movement by the tilt adjusting means moves only the front end portion of the upper part of the seat cushion 2 up and down.

  Accordingly, the front end portion of the seat cushion 2, which is a portion that is moved up and down by the tilt adjusting means, is moved in the respective directions by both the back-and-forth movement by the slider and the up-and-down movement by the lifter. Further, the upper portion of the seat cushion 2, which is a portion that is moved up and down by the lifter, is also moved in that direction by forward and backward movement by the slider.

  The ottoman has a structure in which the front end portion of the seat cushion 2 is lifted, and a structure in which the ottoman is provided separately from the seat cushion 2 in front of the seat cushion 2. In any case, the part lifted by the ottoman is moved in that direction by at least the back-and-forth movement by the slider.

  As shown in FIG. 5, the seat back 3 can be adjusted in inclination in the front-rear direction (indicated by an arrow RC) with respect to the seat cushion 2 by a recliner. In addition, the seat back 3 can be adjusted in position in the front-rear direction (indicated by an arrow LB) by a lumbar support at a portion corresponding to the waist of the seated occupant of the seat back 3. In addition, the back-and-forth movement accompanying the angle change of the seat back 3 by the recliner moves the entire seat back 3 back and forth. Further, when the seat back 3 is moved back and forth by the lumbar support, only the portion of the seat back 3 corresponding to the waist of the seated occupant is moved back and forth. Therefore, the part moved back and forth by the lumbar support is also moved in that direction by the back and forth movement by the recliner.

  In the embodiment of FIG. 1, the lifter of the seat cushion 2 corresponds to the seat position adjusting means A, and the tilt adjusting means of the seat cushion 2 corresponds to the seat position adjusting means B. Each sheet position adjusting means A, B is periodically adjusted by a period adjusting means C with a predetermined change width around each reference position of each sheet position adjusting means A, B. In addition, the adjustment cycles are made different for each of the sheet position adjusting means A and B, and the respective adjustment cycles have a relationship that causes a “beating phenomenon” due to the difference. For example, the adjustment of the sheet position adjusting means A (lifter) is set to a period of 3.6 seconds, and the adjustment of the sheet position adjusting means B (tilt adjusting means) is set to a period of 4 seconds. In this case, the period of the “beat phenomenon” is 36 seconds, which is the least common multiple of each period of the sheet position adjusting means A and B. In general, the period in which seasickness is most likely to occur is 6 seconds. In this case, the period of the “beating phenomenon” is sufficiently longer than that, so there is no concern that a passenger sitting on the seat 1 will have seasickness. In addition, these periods are examples and are not limited to these.

  FIG. 2 shows an electric circuit in the above embodiment. The motors 20L and 20T as drive sources in the sheet position adjusting means A and B are connected so as to be driven and controlled by motor drive circuits 10L and 10T, respectively. The motor drive circuits 10L and 10T are connected to the terminals 42 to 45 of the microcomputer 40 so as to be command-controlled by the microcomputer 40. An on / off signal of the operation switch 50 is supplied to the microcomputer 40 via its terminal 41. The operation switch 50 is turned on when the microcomputer 40 functions as the above-described period adjusting means C. A constant voltage is supplied from the power supply circuit 30 to the microcomputer 40. Further, power is supplied to the motor drive circuits 10L and 10T and the power supply circuit 30.

  The motor drive circuits 10L and 10T are obtained by connecting FETs (field effect transistors) 17 as switching elements to a general motor drive circuit, and switching relay contacts 11 and 12 are connected to both ends of the motors 20L and 20T. ing. Relay coils 13 and 14 for switching and adjusting the relay contacts 11 and 12 are connected to a power source via switching transistors 15 and 16. That is, the relay coils 13 and 14 are connected in parallel to each other via the transistors 15 and 16. The relay contacts 11 and 12 are always in contact with a contact connected to the ground via the FET 17 (shown by a solid line). When excited by the relay coils 13 and 14, the relay contacts 11 and 12 are in contact with the contact connected to the power source ( (Shown with a broken line). FIG. 2 shows the detailed internal configuration of the motor drive circuit 10L, but the motor drive circuit 10T has the same configuration as the motor drive circuit 10L, and is not shown.

  The transistors 15 and 16 are switched by receiving the direction signals LD and TD from the terminal 42 of the microcomputer 40. Here, the transistor 15 is an NPN type, and the transistor 16 is a PNP type. The FET 17 is switched by receiving PWM (pulse width modulation) signals LS and TS from the terminal 43 of the microcomputer 40.

  The motor 20L and the motor drive circuit 10L receive signals from the microcomputer 40 and can function as general lifters. In addition, the motor 20T and the motor drive circuit 10T can function as general tilt adjusting means upon receiving a signal from the microcomputer 40.

  The reference position when the motors 20L and 20T start the period adjustment in response to the signal from the microcomputer 40 is a position stored in advance by the microcomputer 40. The height position of the seat cushion 2 and the height position of the front end portion of the seat cushion 2 at that time are the reference positions of the lifter constituting the seat position adjusting means A and the tilt adjusting means constituting the seat position adjusting means B.

  FIG. 3 shows a program for operating the microcomputer 40. When the program is activated, it is determined in step S1 whether or not the operation switch 50 has been turned on. At this time, if the operation switch 50 is not turned on, a negative determination is made in step S1, and the processing of the program ends. On the other hand, if the operation switch 50 is turned on, an affirmative determination is made in step S1, and a lifter direction signal LD is output to the terminal 42 in step S2. At the same time, a tilt direction signal TD is output to the terminal 44. As shown in FIG. 4, the lifter direction signal LD and the tilt direction signal TD are signals in which the polarity of the signal is periodically changed.

  In the next step S 3, the lifter PWM signal LS is output to the terminal 43. At the same time, the tilt PWM signal TS is output to the terminal 45. As shown in FIG. 4, the lifter PWM signal LS and the tilt PWM signal TS are signals whose duty ratio gradually increases from 0 to 100% and then gradually decreases. Further, the lifter PWM signal LS and the tilt PWM signal TS are set so that the duty ratio becomes 0% at the timing when the polarity of the lifter direction signal LD and the tilt direction signal TD is switched. It is synchronized with the use direction signal TD. In FIG. 4, the lifter PWM signal LS and the tilt PWM signal TS have the vertical axis as the magnitude of the duty ratio, and are different from the actual signal waveforms. However, the signal periods of the lifter direction signal LD and the tilt direction signal TD are different from each other as described above. That is, the cycle of the lifter direction signal LD is 3.6 seconds, and the cycle of the tilt direction signal TD is 4 seconds.

  When the direction signals LD and TD are output to the terminals 42 and 44 of the microcomputer 40, the transistors 15 and 16 of the motor drive circuits 10L and 10T are alternately turned on and off. That is, when the direction signals LD and TD are forward, the transistor 15 is turned on and the transistor 16 is turned off. When the direction signals LD and TD are backward, the transistor 15 is turned off and the transistor 16 is turned off. Turned on. When the transistor 15 is turned on and the transistor 16 is turned off, the relay coil 13 is energized and the relay contact 11 is switched to the power supply side as shown by the broken line, and the relay coil 14 is deenergized and the relay contact 12 is shown as a solid line. As shown in Fig. 4, the contact is kept in contact with the ground side. As a result, current flows through the motors 20L and 20T in the direction indicated by the solid arrows, and the motors 20L and 20T are operated in one direction. Therefore, the lifter and tilt adjusting means are moved by a predetermined amount from the reference position in one direction. On the other hand, when the transistor 15 is turned off and the transistor 16 is turned on, the relay coil 14 is energized and the relay contact 12 is switched to the power supply side as indicated by a broken line, and the relay coil 13 is deenergized and the relay contact 11 is turned off. Is in contact with the ground side as indicated by the solid line. As a result, current flows through the motors 20L and 20T in the direction indicated by the dashed arrows, and the motors 20L and 20T are operated in the other direction. Therefore, the lifter and tilt adjusting means are moved by a predetermined amount from the reference position in the other direction.

  When the PWM signals LS and TS are output to the terminals 43 and 45 of the microcomputer 40, the FETs 17 of the motor drive circuits 10L and 10T are turned on at the duty ratio of the PWM signals LS and TS. As a result, the motors 20L and 20T are energized with the duty ratios of the PWM signals LS and TS. Therefore, the motors 20L and 20T are driven at a speed proportional to the duty ratio of each PWM signal LS and TS.

  FIG. 6 schematically shows the movement of the seat cushion 2 by the lifter and the tilt adjusting means. As shown in FIG. 6, the entire cushion frame 21 constituting the seat cushion 2 is moved in the vertical direction with respect to the floor by the operation of the lifter. That is, it is moved between the position of 21A and the position of 21B. Further, the front end portion of the cushion frame 21 is moved in the vertical direction with respect to the rear end portion by the operation of the tilt adjusting means. That is, it is moved between the position 21C and the position 21D.

  FIG. 7 shows individual movements in a state where the lifter and the tilt adjusting means are simultaneously adjusted. As shown in FIG. 7, the lifter is operated at a 3.6 second cycle as described above, and the tilt adjusting means is operated at a 4 second cycle as described above. Therefore, there is a difference of 0.4 seconds between the adjustment periods.

  FIG. 8 shows an adjustment locus of the rear portion 21F of the cushion frame 21 and an adjustment locus of the front end portion 21E of the cushion frame 21 when the lifter and the tilt adjusting means are simultaneously adjusted as described with reference to FIG. ing. 8 shows the time axis in a shortened manner compared to FIG. 7, and one cycle of the lifter in FIG. 7 and one cycle of the adjustment locus of the rear portion 21F of the cushion frame 21 in FIG. 8 are the same time. is there.

  As shown in FIG. 8, the front end portion 21E of the cushion frame 21 is a combined movement of the lifter movement and the tilt adjustment means, and vibrates at a 4-second period, which is the adjustment period of the tilt adjustment means. Causes a “beating phenomenon” that moves slowly up and down.

  According to the first embodiment, the rear portion 21F of the seat cushion 2 is vibrated at the adjustment period of the lifter. Further, the front end portion 21E of the seat cushion 2 is combined with the adjustment periods of the lifter and the tilt adjustment means, and is vibrated with the combined period and amplitude, thereby generating a “beat phenomenon”. Therefore, while the seated occupant is subjected to vibrations of a relatively small period, the front part is vibrated at a relatively large period due to the “beating phenomenon” around the rear part of the whole body, and a relaxing effect is given.

  In the first embodiment, each of the sheet position adjusting means A and B corresponds to “a plurality of sheet position adjusting means” of the present invention, and the sheet position adjusting means A is a lifter drive such as a motor 20L and a link mechanism. It is configured including the mechanism. The seat position adjusting means B includes a motor 20T and a tilt driving mechanism such as a link mechanism.

  Moreover, in the said 1st Embodiment, the electric circuit except the motors 20L and 20T of FIG. 2 is corresponded to the period adjustment means of this invention.

  FIG. 9 shows a second embodiment of the present invention. A feature of the second embodiment over the first embodiment is that the seat position adjusting means A is constituted by a driving unit 70L including an air bladder 80L and a pump 71, and the seat position adjusting means B is constituted by an air bladder 80T and a pump. It is the point comprised by the drive part 70T containing 71. FIG. The other points are the same, and the description of the same part is omitted.

  The air bag 80L is built in the seat cushion 2. When the air bag 80L is inflated, the height of the seat cushion 2 is increased, and when it is contracted, the height of the seat cushion 2 is decreased. The air bag 80T is built in the front end portion of the seat cushion 2. When the air bag 80T is inflated, the height of the front end portion of the seat cushion 2 is increased, and when it is contracted, the height of the front end portion of the seat cushion 2 is increased. Reduce the height.

  The air bags 80L and 80T are connected to the pump 71 in parallel via the drive units 70L and 70T. The drive unit 70L is formed by connecting an electromagnetic switching valve 72L, a check valve 73L, and a pump 71 in series, and the drive unit 70T is formed by connecting an electromagnetic switching valve 72T, a check valve 73T, and a pump 71 in series. When the electromagnetic switching valves 72L and 72T are energized, the air bags 80L and 80T are inflated by supplying air from the pump 71 via the check valves 73L and 73T and the electromagnetic switching valves 72L and 72T. When the electromagnetic switching valves 72L and 72T are de-energized, the electromagnetic switching valves 72L and 72T are opened to the atmosphere, and the air bags 80L and 80T are evacuated through the electromagnetic switching valves 72L and 72T. Shrinked.

  The electromagnetic switching valves 72L and 72T are turned on / off via the electromagnetic switching valve drive circuits 60L and 60T. The electromagnetic switching valve driving circuits 60L and 60T include a switching transistor 61. The transistor 61 performs a switching operation in response to the lifter direction signal LD and the tilt direction signal TD of the microcomputer 40.

  When the lifter direction signal LD and the tilt direction signal TD are positive, the transistor 61 is turned on to energize the electromagnetic switching valves 72L and 72T. When the lifter direction signal LD and the tilt direction signal TD are in the opposite directions, the transistor 61 is turned off and the electromagnetic switching valves 72L and 72T are deenergized.

  Accordingly, the air bags 80L and 80T are inflated and deflated based on the lifter direction signal LD and the tilt direction signal TD, and the lifter and the tilt adjusting means are operated in the same manner as in the first embodiment. In the second embodiment, the lifter PWM signal LS and the tilt PWM signal TS are not used. The reason is that when the lifter and tilt adjusting means are operated by the air bags 80L and 80T, the air bags 80L and 80T are inflated and contracted without adjusting the amount of air taken in and out through the electromagnetic switching valves 72L and 72T. This is because the process is gradually performed on the original operation characteristics. In the above description, the lifter direction signal LD and the tilt direction signal TD are alternately output in the forward direction and the reverse direction, but the output signal is only the forward direction signal and the reverse direction signal is output. The signal may not be output during the period in which the signal is output. In other words, the lifter direction signal LD and the tilt direction signal TD may be signals that are output intermittently with an equal interval between the forward signal and the reverse signal.

  As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example, in the above embodiment, the present invention is applied to an automobile seat, but may be applied to a seat mounted on an airplane, a ship, a train, or the like. In the above-described embodiment, the plurality of sheet position adjusting units are the lifter and the tilt adjusting unit, but may be a combination of other sheet position adjusting units.

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat cushion 21 Cushion frame 3 Seat back 10L, 10T Motor drive circuit 11, 12 Relay contact 13, 14 Relay coil 15, 16 Transistor 17 FET
20L, 20T Motor 30 Power supply circuit 40 Microcomputer 41-45 Terminal 50 Operation switch 60L, 60T Electromagnetic switching valve drive circuit 70L, 70T Drive unit 71 Pump 80L, 80T Air bag

Claims (5)

A plurality of seat position adjusting means for respectively adjusting the position of a plurality of parts in the seat constituting the seat;
A plurality of sheet position adjusting means, each of which is periodically adjusted with a predetermined change width around each reference position, and each adjustment period of each sheet position adjusting means is different from each other.
A vehicle seat in which the adjustment cycle of each of the seat position adjusting means has a relationship of generating a “beating phenomenon” due to the difference. In claim 1,
The plurality of seat position adjusting means is a vehicle seat configured to include a motor as a drive source for adjusting the seat position. In claim 1,
The plurality of seat position adjusting means is a vehicle seat configured to include an air bag inflated and deflated by air pressure as a drive source for adjusting the seat position. In any of claims 1 to 3,
The relationship between one of the plurality of sheet position adjusting means and the other is as follows: a sheet portion adjusted by one sheet position adjusting means as a whole, and a sheet adjusted by the other one sheet position adjusting means. A vehicle seat that is part of the whole. In any of claims 1 to 4,
One of the plurality of seat position adjusting means is a lifter that adjusts the height of the seat cushion forming the seat portion,
The other one is a tilt adjusting means for adjusting the height of the front end portion of the seat cushion,
A vehicle seat in which the adjustment period of the tilt adjusting means is longer than that of the lifter.

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