WO2007129455A1

WO2007129455A1 - Vehicle seat

Info

Publication number: WO2007129455A1
Application number: PCT/JP2007/000434
Authority: WO
Inventors: Akihiko Okimura; Yoshiteru Igarashi
Original assignee: Oiles Corporation
Priority date: 2006-04-24
Filing date: 2007-04-20
Publication date: 2007-11-15
Also published as: JP4940744B2; JP2007290466A

Abstract

A vehicle seat (1) comprises a seat cushion (3) so installed on the floor (2) of a vehicle that its forward and backward positions and tilting positions can be adjusted, a backrest (4) so installed on the seat cushion (3) that its tilting position can be adjusted, a headrest (5) so supported on the backrest (4) as to be forwardly movable, and in this example, rotatable in the forward direction R1, a rotatingly biasing means (6) for rotatingly biasing the headrest (5) in the forward direction R1, a prohibition mechanism (7) for prohibiting the rotation of the headrest (5) in the forward direction R1, and a releasing means (8) for releasing the prohibition of the movement of the headrest (5) in the forward direction R1 by the prohibition mechanism (7) at an acceleration more than a predetermined level which is applied to the backrest (4) toward the rear side of the vehicle.

Description

Specification

Vehicle seat

Technical field

[0001] The present invention relates to a headrest that supports a seated person's head by moving forward when the rear seater moves rearward due to inertia when subjected to a rear-end collision in a vehicle. The present invention relates to a vehicular seat rod having a rod.

Background art

[0002] Patent Document 1: Japanese Patent Laid-Open No. 10-180 1 4 03

Patent Document 2: Japanese Patent Laid-Open No. 10_1 1 9 6 1 9

Patent Document 3: Japanese Patent Laid-Open No. 11-2 6 8 5 6 6

Patent Document 4: Japanese Patent Laid-Open No. 2 0 0 3 _ 8 1 0 4 4

Patent Document 5: Japanese Patent Laid-Open No. 2 0 0 5 _ 2 2 5 3 3 4

Patent Document 6: Japanese Patent Laid-Open No. 2 0 0 6 — 8 2 7 7 2

Patent Document 7: Japanese Unexamined Patent Publication No. 2 0 0 6 _ 8 8 8 7 5

[0003] In a vehicle, a vehicle seat has been proposed in which a headless rod is moved forward in order to restrain a seated person's head when a rear-end collision occurs.

Disclosure of the invention

Problems to be solved by the invention

[0004] By the way, such a vehicular seat is inadvertently pressed during normal driving.

If the dress is moved forward, the seated person will bend forward and the maneuverability will deteriorate and the ride comfort will be worsened. Although it is necessary to move the headless bag forward, it has not yet been proposed that such an identification mechanism can be installed compactly on the back of a vehicle seat.

[0005] The present invention has been made in view of the above-described points, and the object of the present invention is to accurately identify the time when a rear-end collision is performed and the time when the rear-end collision is not performed and move the headrest forward only when the rear-end collision is performed. It is possible to move it to The object is to provide a vehicle seat that can be installed in a park.

Means for solving the problem

[0006] A vehicle seat according to the present invention includes a backrest of a vehicle, a headless rod that is supported by the backrest so as to be movable forward of the vehicle, and a movement that urges the headless rod to move forward. The urging means, the prohibition mechanism that prohibits the headrest from moving forward, and the prohibition mechanism that releases the prohibition of moving the headless heel forward by releasing the vehicle with a certain acceleration beyond the backrest. Here, the releasing means has a transmission mechanism for transmitting a force based on a certain acceleration or more to the rear of the vehicle applied to the backrest to the prohibiting mechanism.

[0007] According to the vehicle seat rod of the present invention, the release means for releasing the prohibition of the forward movement of the headless rod by the prohibiting mechanism at a certain acceleration beyond the vehicle applied to the backrest is backrested. Since it has a transmission mechanism that transmits force based on acceleration beyond a certain level to the rear of the applied vehicle to the mechanism, it is only when the rear-end collision is accurately identified and rear-end collision, etc. The headless paddle can be moved forward reliably.

[0008] The releasing means may have a load-displacement conversion mechanism that is displaced by a load applied to the backrest portion of the backrest, and the transmission mechanism is a resistance force that generates a speed-dependent resistance force. In this case, the load-displacement conversion mechanism includes a load receiving plate that is rotatably supported by the backrest frame and is arranged in the backrest portion of the backrest. The resistance generator may be connected on the one hand to the load-displacement conversion mechanism and on the other hand to the prohibiting mechanism.

[0009] The resistance force generator is interposed between one rotating body, the other rotating body rotatable relative to the one rotating body, and the other rotating body. At least two spaces whose volumes increase or decrease complementarily by the relative rotation of the other rotating body with respect to the body, the liquid contained in the at least two spaces, and the other rotating body with respect to the one rotating body. In addition to or in combination with an orifice means for generating a resistance force having a magnitude corresponding to the flow velocity of the liquid flowing into and out of at least two spaces that increase or decrease by relative rotation, One of the linear motion and The other linear moving body that is relatively movable relative to the one linear moving body, and the other linear moving body that is interposed between the two linear moving bodies and that is complementary to the relative linear movement of the other linear moving body Outflow to at least two spaces whose volume increases or decreases, the liquid contained in the at least two spaces, and the relative movement of the other linear moving body relative to one linear moving body. Orifice means for generating a resistance force having a magnitude corresponding to the flow rate of the incoming liquid may be provided.

[0010] In the present invention, the headless rod is supported so as to be pivotable or linearly movable forward on the backrest, and the moving urging means is configured to pivot or linearly urge the headrest forward. In addition, the prohibiting mechanism may prohibit the headrest from rotating forward or linearly.

The invention's effect

[0011] According to the present invention, the headless rod can be reliably moved forward only when a rear-end collision is made by accurately identifying when the rear-end collision or the like is not, and the back. It is possible to provide a vehicle seat that can be installed in a compact space for drowning.

[0012] Next, the present invention and its embodiments will be described in more detail based on preferred examples shown in the drawings. The present invention is not limited to these examples.

Brief Description of Drawings

FIG. 1 is a side cross-sectional explanatory view of a preferred example of an embodiment according to the present invention.

2 is an explanatory front sectional view of the example shown in FIG.

Fig. 3 is a cross-sectional explanatory view of the resistance force generator shown in Fig. 1. (a) is a cross-sectional view taken along line a_a shown in (b), and (b) is b_ shown in (a). b line arrow cross-sectional explanation diagram,

Fig. 4 is a diagram for explaining the operation of the example shown in Fig. 1.

FIG. 5 is a side cross-sectional explanatory view of a preferred example of the embodiment according to the present invention, and FIG. 6 is a cross-sectional explanatory view of the resistance force generator shown in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION In FIGS. 1 to 3, the vehicle seat 1 of the present example includes a seat seat 3 that is attached to the floor 2 of the vehicle so that the front and rear positions and the tilt position can be adjusted, and the tilt and position of the seat seat 3 can be adjusted. The backrest 4 of the vehicle mounted on the headrest 4 is movable forward in the backrest 4. In this example, the headrest 5 supported so as to be rotatable in the forward R1 direction, and the headrest 5 in the forward R1 direction Rotating biasing means 6 that urges to rotate in the direction of the head, ban mechanism 1 that prohibits the rotation of headless 回動 5 in the R 1 direction, and R 1 direction in front of headless 卜 5 by ban mechanism 7 And release means 8 for releasing the prohibition of movement to the back 4 with a certain acceleration beyond the rear of the vehicle.

[0015] A mounting mechanism for mounting the seat 3 on the floor 2 so that the front-rear position and tilt position can be adjusted.

Since the attachment mechanism 10 for attaching the 9 and the backrest 4 to the seat seat 3 so as to be adjustable in tilting position is well known, detailed description thereof will be omitted.

[0016] The headless 卜 5 is fixed to the headless 卜 main body 15 and the frame (not shown) of the backrest 4 on the headless 卜 main body 15 in the R 1 direction via the shaft 16. The support member 1 7 is rotatably supported, and the support member 17 does not rotate in the direction opposite to the R 1 direction by the stopper 18 fixed to the frame of the backrest 4. It is like that.

[0017] The rotation urging means 6 as the movement urging means includes a coil spring 19 having one end fixed to the frame of the backrest 4 and the other end fixed to the support member 17. Thanks to the elastic force of the coil spring 19, the headrest 5 is always urged to rotate in the R 1 direction.

The prohibiting mechanism 7 is supported by the frame of the backrest 4 so as to be rotatable in the R 2 direction via the shaft 21, and abuts and engages with the tip of the support member 17 to support the support member 1.鉤 member 2 2 that prohibits rotation of R 7 in the direction of 7, and a stagger 2 2 and a coil spring 2 4 that set the heel member 2 2 to the front end of the support member 1 7 and set the engagement position. It has.

[0019] The release means 8 includes a load-displacement conversion mechanism 3 2 that is displaced by a load applied to the back support 3 1 of the backrest 4 from the occupant seated in the seat 3 and the back support 3 1 of the backrest 4 The force based on the acceleration beyond a certain level applied to the rear of the vehicle is transmitted to the prohibit mechanism 7. On the other hand, it has a transmission mechanism 33 that does not transmit force to the prohibition mechanism 1 based on the acceleration below a certain level applied to the back support 3 1 of the backrest 4.

[0020] The load-displacement conversion mechanism 3 2 is fixed to the cylindrical member 3 6 rotatably mounted in the R 3 direction on the shaft 3 5 fixed to the frame of the backrest 4 and the cylindrical member 3 6 And a load receiving plate 3 7 disposed on the back support portion 3 1 of the backrest 4, and is rotatably supported by the frame of the backrest 4 via the cylindrical member 3 6 and the shaft 3 5. The load receiving plate 37 is embedded in a cushion in the back receiving portion 3 1 of the backrest 4.

[0021] The transmission mechanism 3 3 includes an arm 41 fixed to the cylindrical member 36 at one end, a sleeve 4 2 attached to the other end of the arm 41, and a sleeve 4 2 slidably passing therethrough. At the same time, the wire 4 3 connected to the flange member 2 2 at one end, the resistance force generator 4 4 that generates a speed-dependent resistance force, and the resistance force generator 4 4 are set to the initial state position by elasticity. Coil springs 4 and 5 are provided.

[0022] The resistance force generator 44 has a fixed shaft 50, an inner member 51 as one rotating body fixed to the fixed shaft 50, and a fixed shaft 50 to the inner member 51. The housing 52 as the other rotating body which is relatively rotatable in the R4 direction as a center, and is interposed between the inner member 51 and the housing 52 and of the housing 52 with respect to the inner member 51 At least two of which the volume increases and decreases complementarily by rotation in the R4 direction relative to the fixed axis 50, in this example, four spaces 5 3, 5 4, 5 5 and 5 6, and space 5 3, 5 4, 5 5 and 5 6 and a liquid 5 7 having an appropriate viscosity and a relative relative to the inner member 51 in the R 4 direction around the fixed shaft 50 of the housing 5 2. Space that increases and decreases by rotation 5 3, 5 4, 5 5 and 5 6 Orifice means 60.

[0023] The fixed shaft 50 is fixed to the frame of the backrest 4, and the wire 4 3 is wound around the housing 5 2 so that it is unwound when pulled, and the housing 5 at the other end. The coil spring 45 is fixed to the housing 52 at one end and to the backrest 4 frame at the other end. 5 2 is provided around.

[0024] On the one hand, the resistance connected to the load-displacement conversion mechanism 3 2 via the wire 4 3, the sleeve 4 2 and the arm 4 1, and the other connected to the prohibition mechanism 7 via the wire 4 3 The force generator 44 has a relative rotation in the R4 direction around the fixed shaft 50 of the housing 52 with respect to the inner member 51. The liquid 5 7 is moved from the spaces 5 3 and 5 4 to the spaces 5 5 and 5 6 or vice versa depending on the relative rotational speed in the R 4 direction around the fixed axis 50 of the housing 5 2 relative to the inner member 51 when entering and exiting through the pores 58 and 59. That is, when the speed is high, a large resistance force is applied, and when the speed is low, a small resistance force is applied to the rotation of the housing 52 relative to the inner member 51 relative to the fixed shaft 50 in the R4 direction. However, it is generated.

[0025] In the vehicle seat 1 described above, when an occupant's normal load on the back of the vehicle is applied to the backrest 4 when the occupant is seated on the seat seat 3 or seated on the seat seat 3 In the case of the addition of occupant loads behind the vehicle to the backrest 4 due to the normal acceleration of the vehicle to the occupant, these loads on the backrest 4 are slowed down as a result of such a load on the occupant The load receiving plate 37 that receives the rotation is slowly rotated clockwise about the shaft 35 in the R 3 direction. With this slow rotation of the load receiving plate 37, the arm 41 is also slowly rotated clockwise in FIG. 1 in the direction R3 and engaged with the tip of the arm 41 via the sleeve 42. When the wire 4 3 is bent, the housing 5 2 rotates counterclockwise in FIG. 1 in the R 4 direction with respect to the inner member 51 with the fixed shaft 50 as the center via the other end of the wire 43. Try to be. This rotation creates a slow and steady flow of the liquid 5 7 through the pores 5 8 and 5 9 from the spaces 5 3 and 5 4 to the spaces 5 5 and 5 6 resulting in a large resistance. Thus, the tension member that causes the clockwise rotation in FIG. 1 in the R 2 direction of the flange member 2 2 that abuts on the tip of the support member 17 and releases the engagement is performed. No force is generated on the wire 43, and the prohibiting mechanism 7 prohibits the rotation in the R1 direction in front of the headless 、 5 and the headless 卜 5 is maintained in the normal position. [0026] Also, in the vehicle seat 1, a large rearward acceleration is generated in the passenger seated in the seat seat 3 after the rear-end collision, and the load receiving plate 3 7 is suddenly shown in the R 3 direction around the axis 3 5. When it is rotated clockwise in 1, the wire 43 is rapidly bent, and the housing 52 is fastened with respect to the inner member 51 with the fixed shaft 50 as the center through the other end of the wire 43. Thus, it tries to rotate counterclockwise in Fig. 1 in the R4 direction. This rotation causes a rapid flow of the liquid 5 7 from the spaces 5 3 and 5 4 to the spaces 5 5 and 5 6, resulting in a large resistance and the housing 52 and the inner member 51 are Thus, as shown in FIG. 4, the tension member 22 is pivotally connected to the tip of the support member 17, and the hook member 22 is rotated so as to release the engagement. Force is generated in the wire 43, and the saddle member 2 2 of the prohibit mechanism 7 is in contact with the tip of the support member 17 7 and released from the engagement in the direction of R 2 around the shaft 21 so that the clock in FIG. The headrest 5 is rotated in the R1 direction so as to be biased by the coil spring 19 and hold the occupant's head.

As described above, in the vehicle seat 1, the release mechanism that releases the prohibition of the rotation of the headrest 5 in the R 1 direction in front of the headrest 5 by the prohibiting mechanism 7 at a certain acceleration beyond the back of the vehicle applied to the backrest 4. A force prohibiting mechanism based on acceleration below the vehicle applied to the backrest 4 below a certain force applied to the backrest 4 while a force based on a certain acceleration beyond the vehicle rearward applied to the backrest 4 is transmitted to the prohibiting mechanism 7. Since it has a transmission mechanism 3 that does not transmit to the head, the headrest 5 can be securely attached to the front R 1 only when it is rearranged by accurately distinguishing between when it is impacted and when it is not. It can be moved in the direction.

[0028] Although a rotary type was used as the resistance force generator 44, a direct acting type may be used instead, as shown in FIGS. The resistance force generator 44 shown in FIGS. 5 and 6 includes a cylinder 61 as one linear moving body, and a biston 62 as the other linear moving body relatively movable relative to the cylinder 61. Two spaces 6 3 and 6 4 which are interposed between cylinder 6 1 and biston 6 2 and whose volume is complementarily increased or decreased by the relative linear motion of piston 6 2 with respect to cylinder 61 The viscous liquid 5 7 contained in the two spaces 6 3 and 6 4 and the two spaces 6 3 and 6 4 that increase or decrease due to the relative linear motion of the biston 6 2 with respect to the cylinder 61 Orifice means 6 6 consisting of through-holes 6 5 that generate a resistance force corresponding to the flow velocity of the liquid 5 7, one end connected to the piston 6 2, and the other end connected to one end of the wire 4 3. In order to form an air chamber 6 8 between the cylinder 6 1 and the cylinder 61 so that the volume of the piston rod 6 7 and the volume of the piston rod 6 7 entering and exiting the cylinder 61 can be corrected. Free viston 69.

[0029] When the resistance force generator 4 4 shown in FIGS. 5 and 6 is used, the other end of the wire 4 3 is fixed to the frame of the backrest 4 and the cylinder 61 is connected to another wire. 7 Coil spring 4 5 connected to rod member 2 2 via 5 and setting resistance force generator 4 4 to the initial state surrounds piston rod 6 7 in cylinder 6 1 and cylinder 6 Between 1 and Biston 6 2.

[0030] In the vehicular seat 1 using the resistance force generator 4 4 shown in FIGS. 5 and 6, the passenger's seat on the seat 3 has a backrest 4 and the normal passenger load on the rear of the vehicle In the case of the addition of occupant loads behind the vehicle to the backrest 4 due to the normal acceleration of the vehicle to the occupants seated in the seat seat 卜 3 As a result of the slow load, the load receiving plate 37 that receives the load of the occupant is slowly rotated about the shaft 35. This slow rotation of the load receiving plate 3 7 causes the arm 4 1 to rotate slowly and the wire 4 3 engaged with the end of the arm 4 1 via the sleeve 4 2 to bend. Piston 6 2 tends to be moved directly with respect to cylinder 6 1 through one end of 3 and Biston rod 6 7. This linear motion is performed without causing a large resistance force as a result of the slow flow of the liquid 5 7 from the space 63 to the space 64 via the through-hole 65. Thus, the pulling force that causes the pivot of the hook member 2 2 to come into contact with the tip of the support member 1 7 and release the engagement does not occur on the wire 43, and the prohibiting mechanism 7 of the headless hook 5 Front R1 direction is prohibited and headless 卜 5 is maintained in the normal position. [0031] Further, in the vehicle seat 1 shown in FIGS. 5 and 6, a large rearward acceleration occurs to the occupant seated on the seat seat 3 after the rear-end collision, and the load receiving plate 3 7 suddenly centers on the shaft 3 5 As a result, the wire 43 is rapidly bent, and the biston 6 2 tends to be linearly moved with respect to the cylinder 61 through the one end of the wire 4 3 and the biston rod 6 7. This linear motion causes a rapid flow of the liquid 5 7 from the space 6 3 to the space 6 4, resulting in a large resistance force, and the piston 6 2 and the cylinder 61 are rigidly connected to each other. Thus, the pulling force that causes the abutment member 2 2 to rotate and the contact member 1 7 to come into contact with the tip of the support member 17 and release the engagement is generated in the wire 43, and the prohibiting mechanism 7 The eaves member 2 2 is rotated around the shaft 21 so as to abut and disengage the support member 17 from the tip, and the headrest 5 is held in the R 1 direction so as to hold the head of the occupant. Even in such a vehicle seat 1, there is a release means 8 for releasing the prohibition of the rotation of the headrest 5 in the R 1 direction in front of the headrest 5 by the prohibition mechanism 7 with a certain acceleration applied to the backrest 4. A force based on a certain acceleration beyond the back of the vehicle applied to the backrest 4 is transmitted to the prohibition mechanism 7, while the backrest 4 Prohibition mechanism of force based on rearward acceleration of the vehicle below a certain level Since it has a transmission mechanism 3 3 that does not transmit to the vehicle 7, it accurately discriminates when it is collided and when it is not Thus, the headrest 5 can be reliably moved in the forward R1 direction only when the rear-end collision occurs.

[0032] In the resistance generator 4 4 shown in FIGS. 5 and 6, the cylinder 6 1 is connected to another wire.

The cylinder 6 1 may be directly connected to the flange member 2 2 so as to be freely rotatable. Alternatively, the other wire 75 may be connected to the sleeve 4 2. On the other hand, the biston rod 67 may be pivotally connected to the back 4 frame.

[0033] In any of the above examples of the vehicle seat 卜 1, after moving the headless 卜 5 in the R 1 direction forward, the headrest 5 is forcibly rotated in the direction opposite to the R 1 direction. The tip of the support member 17 is brought into contact with the flange member 2 2 by sliding the tip of the support member 17 on the inclined guide surface 8 1 of the flange member 2 2 and reversing the flange member 2 2. Can be restored. In the above example, wire 4 3 and Z or However, instead of this, a gear mechanism, a rack and pinion mechanism, or the like may be used.

Claims

The scope of the claims

[1] A backrest of the vehicle, a headless rod that is supported by the backrest so as to be movable in front of the vehicle, a moving urging means that urges the headless rod to move forward, and a headless rod A prohibiting mechanism for prohibiting the forward movement of the vehicle and a release means for releasing the prohibition of the forward movement of the headless bag by the prohibiting mechanism at a certain acceleration beyond the back of the vehicle applied to the backrest. The release means is a vehicle seat that has a transmission mechanism that transmits a force based on an acceleration of a certain level or more to the back of the vehicle applied to the backrest to the prohibition mechanism.

[2] The release means has a load-to-displacement conversion mechanism that is displaced by the load applied to the backrest of the backrest, and the transmission mechanism generates a resistance force that generates a speed-dependent resistance force. 2. The vehicle seat according to claim 1, further comprising a living device, wherein the resistance generator is connected to the load-displacement conversion mechanism on one side and to the prohibiting mechanism on the other side.

[3] The vehicle according to claim 2, wherein the load-displacement conversion mechanism includes a load receiving plate that is rotatably supported by the backrest frame and is disposed on the backrest portion of the backrest. Oka · For sea bream.

[4] The resistance generator is disposed between one rotating body, the other rotating body that is rotatable relative to the one rotating body, and one rotating body. At least two spaces whose volumes increase or decrease complementarily by the relative rotation of the other rotating body with respect to the body, the liquid contained in the at least two spaces, and the other rotating body with respect to the one rotating body. 4. The vehicle according to claim 2, further comprising orifice means for generating a resistance force having a magnitude corresponding to the flow velocity of the liquid flowing into and out of at least two spaces that increase or decrease by relative rotation. Sheet.

[5] The resistance force generator is interposed between one of the linear motion bodies, the other linear motion body that is relatively movable relative to the one of the linear motion bodies, and one of the linear motion bodies. At least two spaces whose volumes increase or decrease complementarily by relative movement of the other linear moving body with respect to the moving body, the liquid contained in the at least two spaces, and the other linear moving body with respect to the one moving body At least two spaces that increase or decrease with relative linear motion The vehicle seat according to any one of claims 2 to 4, further comprising an orifice means for generating a resistance force having a magnitude corresponding to the flow velocity of the liquid flowing into and out of the vehicle.

The headrest is supported so that it can rotate or move forward in the backrest, and the moving urging means is designed to rotate or urge the headless rod forward, 6. The vehicle seat according to any one of claims 1 to 5, wherein the headrest is prohibited from rotating or moving linearly forward.