JP2016199066A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat capable of alerting a seating person with simple structure without causing deterioration of seating comfort.SOLUTION: A vehicle seat 1 comprises: a bag body disposed on a peripheral edge part of a body contact part of a seating person D seated on the vehicle seat 1 on a surface of a seat cushion 2 or seat back 10; a danger detection part 50 putting out a signal when detecting danger in vehicle movement; and a feeding part 40 feeding a fluid into the bag body when receiving the signal. The bag body has a first site fixed to the peripheral edge part, and a second site folded and overlapped on the first site in a normal state, and is configured so that the second site expands to contact the body of the seating person D when the feeding part 40 feeds the fluid to the bag body.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle seat.

  2. Description of the Related Art There is known a vehicle seat that gives a predetermined stimulus to a seated person and alerts the seated person when a danger associated with movement of the vehicle such as a seated person's sleep is detected. In the invention disclosed in Patent Document 1, on the lower side of the thinned portion of the cushion pad of the automobile seat, a bag body that extends upward by being supplied with air from the pump and inflated, and an upper end portion of the bag body And a vibration element attached to the. In a normal state, the bag body is contracted and the vibration element is separated from the lower surface portion of the cushion pad. For this reason, the sitting comfort of the seat cushion in the normal state can be ensured. In the state where the danger of moving the vehicle such as the occupant's sleep is detected, the bag body that is supplied with air by the operation of the pump extends upward, and the vibration element is placed on the lower surface of the cushion pad. Abut. At the same time, the vibration element is operated, and the vibration stimulus of the vibration element is transmitted to the body of the seated person via the cushion pad, so that the seated person can be alerted.

JP 2009-248631 A

  In the invention disclosed in Patent Document 1, as described above, not only air is supplied to the bag body but also the vibration element needs to be operated in order to alert the seated person. For this reason, in addition to the mechanism for supplying air to the bag body, a power supply for supplying power to the vibration element, and a member such as a cable for connecting the power supply and the vibration element are separately required, which complicates the structure of the apparatus. There was a risk of inviting. In view of such a problem, an object of the present invention is to provide a vehicle seat that has a simple structure and can draw attention of a seated person without deteriorating sitting comfort.

  1st invention of this invention is a vehicle seat, Comprising: It arrange | positions in the peripheral part of the said body contact part of the said seated person when a seated person seats on the said vehicle seat on the surface of a seat cushion or a seat back. A bag detecting body, a danger detecting section that emits a signal when a danger in moving the vehicle is detected, and a supply section that receives a signal from the danger detecting section and supplies fluid to the bag body. The bag body has a first part fixed to the peripheral edge part and a second part folded and superimposed on the first part in a normal state, and the supply part is When the fluid is supplied to the bag body, the second portion expands and comes into contact with the body of the seated person.

  According to the first invention, when the supply unit supplies the fluid to the bag body, the second part of the bag body attached to the surface of the seat cushion or the seat back expands, without using the cushion material or the skin material, Directly touching the seated person's body. For this reason, a seated person's attention can be alerted only by the irritation | stimulation which the bag contact | abutted, without requiring the mechanism for operating a vibration element etc. FIG. Further, since the bag body is disposed at the peripheral edge portion of the body contact portion of the seated person seated on the vehicle seat, it is difficult to adversely affect the sitting comfort of the vehicle seat. Therefore, it is possible to alert the seated person with a simple structure and without causing deterioration in sitting comfort.

  According to a second aspect of the present invention, in the first aspect, the bag body is folded in half with respect to the first portion in a normal state, and the fold portion is in the direction of the seated person. The supply part is connected to the first part, and when the fluid is supplied from the supply part to the first part, the second part causes the fold part to be connected to the first part. It is characterized by being configured so as to rotate and deploy at the center and come into contact with the body of the seated person.

  According to the second invention, the second part contacts the seated person's body in a state where the second part rotates and unfolds and the centrifugal force acts. As a result, the second part comes into contact with the body of the seated person in a vigorous state, so that it is possible to increase the stimulus for alerting the seated person.

  According to a third aspect of the present invention, in the second aspect of the present invention, a weight body is attached to the second portion to increase an impact when contacting the occupant's body.

  According to the 3rd invention, the centrifugal force which acts on a 2nd site | part by a weight body can be strengthened. Thereby, the stimulus for alerting a seated person can be strengthened rather than the structure where the weight body is not attached.

  According to a fourth aspect of the present invention, in any one of the first aspect to the third aspect, in the normal state, the second part is folded and superimposed on the first part. An elastic member is disposed between the first part and the second part.

  According to the 4th invention, the 2nd site | part of the bag body after expansion | deployment can be returned to the state automatically folded by the elastic restoring force of the elastic member.

1 is a perspective view of an automobile seat according to a first embodiment of the present invention. It is an enlarged view of the alerting mechanism which concerns on the said embodiment. It is a disassembled perspective view of the bag part of the alerting mechanism which concerns on the said embodiment. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 1, illustrating a folded state of the bag body. It is a figure which shows the state by which the bag body main body of the alerting mechanism which concerns on the said embodiment was expand | deployed corresponding to FIG. It is a wiring block diagram of the alerting mechanism which concerns on the said embodiment. It is a figure which shows one of the modifications of the alerting mechanism which concerns on the said embodiment corresponding to FIG. It is a figure which shows another one of the modification of the alerting mechanism which concerns on the said embodiment corresponding to FIG. It is a figure which shows another one of the modifications of the alerting mechanism which concerns on the said embodiment corresponding to FIG.

  1 to 6 show an embodiment of the present invention. This embodiment shows an example in which the present invention is applied to the left side surface of a seat back of an automobile seat. In each figure, each direction of the automobile when the automobile seat is attached to the automobile is indicated by an arrow. In the following description, the description regarding the direction is made based on this direction.

  As shown in FIG. 1, the vehicle seat 1 includes a seat cushion 2 that serves as a seating portion, a seat back 10 that serves as a backrest, and a headrest 3 that supports the head. Since the seat cushion 2 and the headrest 3 have a known configuration, description thereof will be omitted, and the seat back 10 will be described. The seat back 10 has a urethane foam back pad 12 as a cushioning material placed on a metal back frame (not shown) forming a skeleton, and a back cover 13 as a skin material from above. It has a covered structure.

  As shown in FIG. 4, the back pad 12 is disposed on both the left and right sides of the main part 121 and mainly supports the body side part of the seated person D. Left and right side portions 122. The surface of the back pad 12 includes a seating surface 12A and side surfaces 12B located on the left and right sides of the seating surface 12A. The seating surface 12A includes a front surface portion 121A of the main portion 121, a seat width direction inner side surface 122A of the side portion 122 that extends from the end of the front surface portion 121A on the outer side in the seat width direction so as to incline toward the outer front in the seat width direction. , Is composed of. In the seating surface 12 </ b> A, a longitudinal groove portion 124 is provided at a boundary portion between the main portion 121 and the side portion 122. Further, in the seating surface 12A, a lateral groove portion 125 (see FIG. 1) extending in the seat width direction from a design requirement is provided in the middle portion of the main portion 121 in the vertical direction. The side surface 12B extends from the front end portion of the inner side surface 122A in the seat width direction of the side portion 122 to incline toward the rear outside in the seat width direction. Since the side surface 12B has a symmetrical structure, only the left side surface 12BL is shown as a representative in FIG.

  The back cover 13 is formed by sewing pieces such as fabric and genuine leather into a three-dimensional shape. The back cover 13 is attached to the back pad 12 in a state where the back cover 13 is put on the back pad 12 and a portion corresponding to the vertical groove portion 124 or the horizontal groove portion 125 of the back pad 12 is fixed to the back pad 12. That is, as shown in FIG. 4, the back cover 13 follows the shape of the seating surface 12 </ b> A of the back pad 12 and covers the seating surface cover portion 13 </ b> A covering the same and the shape of the side surface 12 </ b> B of the backpad 12. It is comprised from the side cover part 13B etc. which cover. When the occupant D is seated on the vehicle seat 1, the vicinity of the body contact portion of the seat occupant D in the seating surface cover portion 13A and the vicinity of the front end portion of the side cover portion 13B are the body contact portion of the seat occupant D. It becomes the peripheral part. A bag body 30 (to be described later) of the alerting mechanism 20 is disposed near the upper front end of the left side cover portion 13BL in the side cover portion 13B.

  As shown in FIG. 1, the alerting mechanism 20 includes a bag body portion 30, a supply portion 40 that is connected to the bag body portion 30 and disposed inside the vehicle seat 1, and controls the supply portion 40 that will be described later. A danger detection unit 50 that sends an operation signal to the unit 42.

  As shown in FIG. 3, the bag body 30 includes a bag body 31, a string-like elastic member 32, a weight body 33, and a blindfold 35. The bag body 31 is manufactured by superimposing films made of urethane resin on the left and right sides and integrating the front and rear and upper and lower peripheral edges 31A by heat welding. For this reason, the bag body 31 is configured as a space in which the inside of the central portion 31B can hold air. In the normal state, the bag body 31 is in a state where the front portion of the fold portion 313 is folded back leftward and folded in two at the fold portion 313 that is the central portion in the longitudinal direction of the bag body 31. Yes. In a normal state, a portion on the right side (in the sheet width direction) of the fold portion 313 of the bag body 31 is set as the fixed portion 311, and a portion on the left side (outside in the sheet width direction) is set as the rotation portion 312. Yes. The fixed portion 311 is fixed to the left side cover portion 13BL by two upper and lower L-shaped regions S of the peripheral portion 31A being sewn together in the vicinity of the front end portion of the surface portion of the left side cover portion 13BL. . As shown in FIG. 4, the rotating part 312 is overlapped in a state of being in contact with the left side surface of the fixed part 311. The opposing portions of the fixed portion 311 and the rotating portion 312 are connected by a string-like elastic member 32 as shown in FIG. The rotating part 312 is urged to rotate counterclockwise by the elastic restoring force of the string-like elastic member 32 as viewed from above with the fold part 313 as the center. A weight body 33, which is a metal weight having a substantially rectangular surface that is long in the vertical direction, is attached to a portion slightly rearward of the central portion in the front-rear direction of the left side surface of the rotation portion 312 in the normal state. Further, a blindfold material 35 is attached to the left side surface of the rotation part 312 in the normal state so as to cover the left side surface of the rotation part 312 and the weight body 33 from the left side. The blindfold 35 covers the bag body 31 so that it is difficult to see from the left side of the automobile seat 1, and may be manufactured using the same material as the back cover 13 in order to make it look uniform. it can. In FIG. 4, the string-like elastic member 32 is omitted for easy understanding of the drawing. The bag body 31 corresponds to a “bag body” in the claims. The fixing part 311 corresponds to a “first part” in the claims. The rotating part 312 corresponds to a “second part” in the claims. The string-like elastic member 32 corresponds to an “elastic member” in the claims.

  As shown in FIG. 1, the supply unit 40 includes a tube 41, a control unit 42, a pressurized tank 44, and a pump 45. The tube 41 is formed in a hollow shape so that air can pass through the inside thereof. As shown in FIG. 4, the tube 41 passes through the back cover 13 from the outside of the automobile seat 1 and passes through the inside of the back pad 12. Has been. As shown in FIG. 2, one end portion of the tube 41 is welded to the terminal portion of the fixing portion 311 of the bag body 31, and the other end portion is connected to the pressurized tank 44. A controller 42 is provided in the middle of the tube 41. The control unit 42 includes a first valve 421 and a second valve 422. The first valve 421 is a so-called two-way valve that opens the ventilation of the tube 41 in the open state and blocks the ventilation of the tube 41 in the closed state. The second valve 422 is a so-called three-way valve, and the ventilation of the tube 41 is always open. When the second valve 422 is open, the ventilation between the outside air path G communicating with the outside air of the seat and the inside of the tube 41 is released, and the second valve 422 is closed. Sometimes, the ventilation between the outside air path G and the inside of the tube 41 is blocked. The open / closed states of the first valve 421 and the second valve 422 are controlled by an ECU 51 described later of the danger detection unit 50. The pressurizing tank 44 is attached to a back frame (not shown), and the inside thereof is filled with air under pressure. The pressurized tank 44 is monitored so that the internal air pressure becomes a predetermined value by a pressure detector (not shown). More specifically, when the air pressure inside the pressurized tank 44 decreases and the internal pressure falls below a predetermined value, the pressure detector sends an operation signal to the pump 45 connected to the pressurized tank 44 and operates. Air is replenished inside the pressurized tank 44 by the pump 45. When the amount of air inside the pressurized tank 44 is supplemented and the internal pressure reaches a predetermined value, the pressure detector sends a stop signal to the pump 45 to stop the pump 45.

  The danger detection unit 50 is electrically connected to an indoor camera (not shown) that captures a seated person D seated on the vehicle seat 1 and the first valve 421 and the second valve 422 of the control unit 42 as shown in FIG. ECU51 which is carrying out. As shown in FIG. 6, the ECU 51 processes information such as the movement and posture of the eyeball of the seated person D captured by the indoor camera, and transmits a predetermined operation signal to the control unit 42. The open / close state of the first valve 421 and the second valve 422 can be switched.

  The operation of the alerting mechanism 20 will be described. As described above, when the alerting mechanism 20 is in the normal state, the rotating part 312 of the bag body 31 is folded on the fixed part 311 as shown by the solid lines in FIGS. It is in the state. At this time, as shown in FIG. 6, the ECU 51 transmits a signal for holding both the first valve 421 and the second valve 422 to the control unit 42. When the ECU 51 determines that the seated person D is asleep based on the information captured by the indoor camera, the ECU 51 switches the first valve 421 to the open state with respect to the control unit 42 and closes the second valve 422. Send a signal to keep. Thereby, the ventilation path from the pressurized tank 44 shown in FIG. 2 to the bag body 31 through the first valve 421 and the second valve 422 is opened, so that the compressed air inside the pressurized tank 44 is stored in the bag. It flows into the fixing part 311 of the body body 31 vigorously. The air that has flowed into the fixed part 311 swells the fixed part 311 as indicated by a two-dot chain line in FIG. When the crease part 313 and the rotation part 312 are inflated by the air that is about to flow into the rotation part 312, the rotation part 312 rotates clockwise around the crease part 313 as viewed from above. As a result, as shown by the solid line in FIG. 5, the rotating portion 312 comes into contact with the left shoulder of the seated person D and can generate a stimulating stimulus.

  When the rotation part 312 is fully expanded and the expansion of the bag body 31 is completed, the ECU 51 transmits a signal for switching the first valve 421 to the closed state and switching the second valve 422 to the open state to the control unit 42. . Accordingly, the ventilation path from the pressurized tank 44 to the first valve 421 shown in FIG. 2 is blocked from the ventilation path from the first valve 421 to the bag body 31, and the second valve 422 is connected from the bag body 31 to the first valve 421. Since the ventilation path that passes through to the outside air path G is opened, the air inside the bag body 31 is discharged to the seat outside air through the second valve 422 and the outside air path G. At this time, as shown by the solid line in FIG. 5, since the string-like elastic member 32 is in the stretched state, the fixing portion 311 and the rotating portion 312 are crushed together by the elastic restoring force, and the bag body The air inside 31 is quickly discharged. When the rotation part 312 rotates counterclockwise around the crease part 313 and overlaps with the fixing part 311, the bag body 31 returns to the folded state as shown in FIG. When the bag body 31 returns to the folded state, the ECU 51 transmits a signal for switching the second valve 422 to the closed state while keeping the first valve 421 closed to the control unit 42. Thereby, the rotation part 312 will be in the state which completed the rotation deployment of the 1st time. Next, the ECU 51 again transmits a signal for switching the first valve 421 to the open state and holding the second valve 422 in the closed state to the control unit 42 to repeat the above operation. That is, the alerting mechanism 20 once hits the left shoulder of the seated person D multiple times (twice in the present embodiment) at the rotating portion 312 of the bag body 31 once it is determined that the seated person D is asleep. It is configured. Thereby, the alerting mechanism 20 can directly give the stimulus of hitting the left shoulder with a human palm a plurality of times continuously to the body of the seated person D. When the rotation part 312 completes the second rotation and deployment, the ECU 51 transmits a signal for holding both the first valve 421 and the second valve 422 to the control unit 42, so as to alert the attention mechanism. 20 returns to the normal state.

  In the present embodiment configured as described above, the following operational effects can be obtained. When the supply unit 40 supplies air to the bag body 31, the rotating portion 312 of the bag body 31 attached to the surface of the seat back 10 expands and sits directly without using a cushion material or a skin material. It touches like hitting the body of person D. For this reason, without requiring a mechanism for operating the vibration element or the like, the seated person D can be alerted only by the stimulus with which the bag body 31 abuts. Further, since the bag body 31 is disposed at the peripheral edge of the body contact portion of the seated person D who is seated on the automobile seat 1, it is difficult to adversely affect the sitting comfort of the automobile seat 1. Therefore, it is possible to alert the seated person D with a simple structure and without causing deterioration in sitting comfort. In addition, the rotating part 312 rotates and unfolds and comes into contact with the body of the seated person D in a state where centrifugal force acts. Thereby, since the rotation part 312 will contact | abut to the body of the seated person D in the state with the momentum, the stimulus for alerting the seated person D can be strengthened. Further, the centrifugal force acting on the rotating portion 312 can be increased by the weight body 33. Thereby, the stimulus for calling attention of seated person D can be strengthened rather than the structure where weight body 33 is not attached. Moreover, the rotation site | part 312 of the bag main body 31 after expansion | deployment can be automatically returned to the state folded by the elastic restoring force of the string-like elastic member 32. FIG.

  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 present embodiment, a structure is shown in which only one weight body 33 is attached to a slightly rear portion of the central portion of the left side surface of the rotation portion 312 in the normal state. However, the position and the number of weights are not limited to this. That is, for example, as shown in FIG. 7, a plurality of weight bodies 60 (first weight body 61, second weight body 62, first weight body 60 in FIG. A structure in which a total of six weight bodies 63, a fourth weight body 64, a fifth weight body 65, and a sixth weight body 66 are attached may be used. In this structure, for example, the first weight body 61, the second weight body 62, the third weight body 63,... Thus, the rotational speed of the terminal portion is amplified. Thereby, since the moment when the rotation part 312 hits a seated person's left shoulder part further strengthens, the irritation | stimulation for alerting the seated person D can be strengthened more.

  In the present embodiment, an example in which the bag body 31 is disposed on the left side surface of the automobile seat 1 is shown. However, the disposition position of the bag body 31 is not limited to this, and may be a structure disposed on the seating surface of the automobile seat 1, for example. That is, a structure in which the fixing portion 311 of the bag body 31 is sewn to a portion corresponding to the seat width direction inner side surface 122A of the side portion 122 in the seating surface cover portion 13A may be employed.

  Moreover, in this embodiment, the bag main body 31 which becomes a shape like the stick | rod extended to the front right side as shown in FIG. However, the shape of the bag body 31 after deployment is not limited to this. That is, for example, as shown in FIG. 8, when deployed, the front end portion 812A of the rotating part 812 has a structure using a P-shaped bag body body 81 that protrudes to the right side (in the sheet width direction) from the rear end portion 812B. There may be. In this structure, the seated person D is a seated person DS having a smaller physique than the standard body, and even if the left shoulder of the seated person DS cannot sufficiently approach the left side of the seat, Can be brought into contact with the front end 812 </ b> A of the rotation part 812 of the bag body 81.

  Moreover, in this embodiment, the bag main body 31 by which the rotation part 312 was folded in two on the fixed part 311 and was piled up in the normal state was used as a bag. However, how to fold the bag in the normal state is not limited to this, and it may be three or more. That is, for example, as shown in FIG. 9, a structure using a bag body 91 formed in a bellows shape that can be expanded and contracted by being folded a plurality of times may be used. In this structure, the fixing portion 911 that is the left rear end of the bag body 91 is fixed to the portion corresponding to the seat width direction inner side surface 122A of the side portion 122 in the seating surface cover portion 13A by an appropriate method. . As shown by the solid line in FIG. 9, the bag body 91 is folded in a state in which the fixed portion 911 and the contact portion 912 that is the right front end portion are overlapped with each other. When the bag body 91 is unfolded by the operation of the supply unit 40, the bag body 91 extends toward the front right as shown by a two-dot chain line in FIG. 9, and the contact portion 912 strikes the body of the seated person D. Abut. The fixed part 911 and the contact part 912 are connected by a string-like elastic member 92, and the developed contact part 912 is urged toward the left rear so as to return to the folded state by the elastic restoring force.

  Moreover, in this embodiment, the string-like elastic member 32 was used as an elastic member. However, the elastic member may be a leaf spring or a torsion coil spring.

  Further, in the present embodiment, the example in which the danger detection unit 50 uses the indoor camera as a means for detecting the driver's doze has been described. However, the present invention is not limited thereto. It may be the means. Further, the danger detected by the danger detection unit 50 may be other than the sleep of the seated person, and may be configured to detect, for example, excessive speed of the automobile.

  Moreover, in this embodiment, it was set as the structure which expand | deploys the bag main body 31 by supply of air. However, the structure is not limited to this, and a structure in which the bag body 31 is deployed by supplying other fluid such as gas or liquid may be used.

  In the present embodiment, the present invention is applied to the seat back 10. However, the present invention is not limited to this and may be applied to the seat cushion 2. In this structure, for example, as shown in FIG. 1, when a warning mechanism is provided on the front surface portion 2A of the seat cushion 2 and an excessive speed of the vehicle is detected, the rotating portion 312 is a leg that steps on the accelerator. It can also be configured to call attention by abutting to touch.

  In the present 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.

1 Car seat (vehicle seat)
31 Bag body (bag)
311 Fixed part (first part)
312 Rotating part (second part)
313 Crease part 32 String-like elastic member (elastic member)
33 Weight body 40 Supply unit 50 Danger detection unit

Claims (4)

A vehicle seat,
Detecting the danger of the vehicle moving when the seat is seated on the vehicle seat on the surface of the seat cushion or the seat back and the bag disposed at the periphery of the body contact portion of the seated person Then, a danger detection unit that emits a signal, and a supply unit that receives a signal from the danger detection unit and supplies fluid to the bag body,
The bag body has a first part fixed to the peripheral edge part, and a second part folded and superimposed on the first part in a normal state,
A vehicle seat configured such that, when the supply unit supplies fluid to the bag body, the second portion expands and comes into contact with the body of a seated person. In claim 1,
In the normal state, the bag body is folded in half with respect to the first part, and the fold part is arranged in the direction of the seated person,
The supply unit is connected to the first part;
A vehicle seat configured such that when a fluid is supplied to the first part from the supply unit, the second part rotates and unfolds around the fold part and contacts a seated person's body. In claim 2,
A vehicle seat having a weight attached to the second part for increasing an impact when contacting the body of a seated person. In any one of Claims 1-3,
A vehicle in which an elastic member is disposed between the first part and the second part in order to maintain the second part folded and superimposed on the first part in the normal state. Sheet.

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