JP2008273445A - Vehicular headrest tilting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress a displacement amount of a head part of an occupant in rear end collision of a vehicle with a comparatively simple composition. <P>SOLUTION: In a rear seat 10 of the vehicle, a seat back 12 capable of supporting the occupant C's back is elastically supported to be able to tilt backward. The backward tilting movement performed by the seat back 12 pushed backward by the occupant C is used for forward tilting the headrest 13 capable of supporting a rear head part Ca of the occupant C. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle headrest tilting device.

  2. Description of the Related Art Conventionally, there is a vehicle seat device having a so-called active headrest function in which a headrest is moved forward at the time of a rear collision of a vehicle and an occupant's head is pressed earlier by the headrest (Patent Document 1).

  In the vehicle seat device of Patent Document 1, a headrest support arm is provided at the upper side of the seatback frame so as to be rotatable, and a lower portion of the headrest support arm extends downward and is disposed inside the seatback. And while attaching a headrest to the upper end part of a headrest support arm, when the load from a passenger | crew receives a load between the lower part of a headrest support arm and the seat back frame, the connection part extended backward is provided.

In this vehicle seat device, when the occupant is pressed against the seat back during a rear-end collision of the vehicle, the connecting portion at the lower part of the headrest support arm extends rearward, and the headrest support arm rotates to move the headrest forward of the vehicle. It is pushed out by seesaw movement. In the vehicle seat having such a structure, it is possible to suppress the occupant's head from being largely displaced rearward at the time of a rear-end collision of the vehicle.
Japanese Patent Laid-Open No. 7-291005 (page 3, FIG. 6)

  However, in such a conventional vehicle seat device, there is a problem that the cost increases because the adjustment of the mechanism of the connecting portion that moves the headrest forward under the load from the occupant is complicated.

  In view of the above, an object of the present invention is to make it possible to suppress the displacement amount of the head of an occupant during a rear-end collision of a vehicle with a relatively simple configuration.

  The vehicle headrest tilting device of the present invention elastically supports a seat back that can support the back of the occupant so that the seat back can be tilted backward, and uses the rear tilt performed by the entire seat back that is pushed backward by the occupant. A headrest capable of supporting the back of the occupant tilts forward.

  A vehicle headrest tilting device according to the present invention includes a seat back that can be tilted rearward and can support the back of an occupant, a seatback support that elastically supports the seatback so that it can tilt backward, and an upper end of the seatback A headrest that can be tilted forward and can support the rear head of the occupant, a biasing member that biases the headrest in the rearward tilt direction, and the seat back that is provided on the vehicle body and pushed backward by the occupant. And a headrest support portion that tilts the headrest forward by moving a portion of the headrest above the tilting center of the headrest forward using forward tilting.

  According to the present invention, the headrest tilts forward at the time of rear collision of the vehicle, so that the displacement amount of the head of the occupant can be suppressed at the time of rear collision of the vehicle. Further, according to the present invention, the entire seat back elastically supported so as to be able to tilt rearward functions as a pressure receiving portion that receives a load from the occupant in order to move the headrest forward in the event of a rear surface collision of the vehicle. There is no need to particularly provide a complicated connecting portion inside, and the displacement amount of the head of the occupant can be suppressed at the time of a rear collision of the vehicle with a relatively simple configuration.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing an arrangement state of a vehicle seat device installed in a vehicle interior in the present embodiment, FIG. 2 is a side view showing a state in which a seat back of a rear seat is tilted forward, and FIG. 4 is an exploded perspective view showing a vehicle body side portion of the rear seat locking mechanism, FIG. 5 is a perspective view showing the headrest of the rear seat as seen obliquely from the rear, and FIG. FIG. 7 is a side view illustrating the relationship between the seat back and the headrest of the rear seat in the driving state and at the time of the rear collision, in order, FIG. It is a side view which shows the behavior of the headrest at the time in order from (a) to (c). In the following description, the front means the front in the vehicle front-rear direction, the rear means the rear in the vehicle front-rear direction, and the left-right direction means the vehicle width direction.

  As shown in FIGS. 1 and 2, an automobile that is a vehicle includes a rear seat 10 that is a vehicle seat and a front seat 20 that is a vehicle seat positioned in front of the rear seat 10. The automobile also includes a vehicle headrest tilting device 17 that functions as an active headrest in the rear seat 10.

  The rear seat 10 and the front seat 20 are mounted on seat cushions 11 and 21 that can support the buttocks of the occupant C, seat backs 12 and 22 that can support the back of the occupant C, and upper ends of the seat backs 12 and 22, respectively. And headrests 13 and 23 capable of supporting the rear head Ca of the occupant C. A back panel 1 constituting the rear wall of the passenger compartment is disposed at a distance behind the seat back 12 of the rear seat 10, and the upper end of the back panel 1 is a rear parcel shelf 2. The back panel 1 constitutes a vehicle body.

  The seat back 12 of the rear seat 10 is pivotable back and forth around a pivot shaft 14 provided at the lower portion of the seat back 12 with the left-right direction as the axial direction. With this structure, the seat back 12 can be tilted back and forth with the pivot shaft 14 as the center of tilting.

  As shown in FIG. 3, a seat back support portion 18 is provided between the seat back 12 and the back panel 1. The seat back support portion 18 elastically supports the seat back 12 so that it can tilt backward.

  The seat back support portion 18 includes a lock mechanism 31 that detachably engages the seat back 12 with respect to the back panel 1, and a compression spring 30 that is an elastic member incorporated in the lock mechanism 31. .

  The lock mechanism 31 includes a latch 33 as an engaging member provided on the seat back 12, and a striker 32 provided on the back panel 1 and detachable from the latch 33. The lock mechanism 31 functions as a holding member that holds the seat back 12 in the use position.

  The striker 32 is bent in a U shape, and both ends thereof are coupled to the fixed plate 32a. As shown in FIGS. 3 and 4, the striker 32 is attached to the back panel 1 by a base plate 34 and a cover 35. The base plate 34 is formed by a rectangular flat plate. The cover 35 has a rectangular shape along the outer shape of the base plate 34, and a bulging portion 35 a that houses the striker 32 and the compression spring 30 is formed at the center.

  In this structure, the striker 32 is inserted into the opening 35b formed in the bulging portion 35a so as to be relatively movable from the inside of the cover 35, and the compression spring 30 is interposed between the fixed plate 32a of the striker 32 and the base plate 34. Then, screws 36 inserted into mounting holes 34a and 35c formed at the four corners of the base plate 34 and the cover 35 are fastened and fixed to the back panel 1.

  On the other hand, as shown in FIG. 3, the latch 33 includes a latch plate 37 formed with a notch 37 a that is fixed to the frame 12 a of the seat back 12 and that fits the U-shaped bent portion of the striker 32. Engagement that is rotatably attached to the plate 37, engages (locks) and releases (unlocks) the striker 32 fitted in the notch 37a, and is urged to rotate in the engagement direction. A piece 38 and a pull wire 39 for rotating the engagement piece 38 in the disengagement direction are provided.

  In the lock mechanism 31, the compression spring 30 elastically supports the striker 32 to elastically support the seat back 12 so that it can tilt backward. The spring force of the compression spring 30 is set so that the load on the passenger C acting on the seat back 12 can be elastically supported. The compression spring 30 is compressed when a dynamic load on the rear of the vehicle due to inertia acting on the occupant C acts on the seat back 12, that is, when the seat back 12 is pushed rearward by the occupant C, The rear tilt of the seat back 12 is allowed.

  Then, by releasing the locking of the back panel 1 by the lock mechanism 31, the seat back 12 can be tilted forward from the use position as shown in FIG. 2, and the seat back 12 overlaps the upper surface of the seat cushion 11. So that it can be folded.

  As shown in FIGS. 1 and 2, the headrest 13 is pivotable back and forth around a pivotal support shaft 15 provided in the lower portion of the headrest 13 with the vehicle width direction as an axial direction. With this structure, the headrest 13 can be tilted back and forth with the pivot shaft 15 as the center of tilting. Here, the rotation support shaft 15 is supported by a pair of left and right stays 19 (see FIG. 5) provided on the frame 12 a of the seat back 12. As shown in FIG. 3, the headrest 13 is urged in the rearward tilt direction by a spring 16 that is an urging member that is externally attached to the rotation support shaft 15.

  As shown in FIG. 5, the headrest 13 includes a headrest main body 13a and a reinforcing plate 13b as a reinforcing portion provided on the rear surface of the headrest main body 13a. And the rotation spindle 15 (FIG. 3) is attached to the headrest main body 13a. The reinforcing plate 13b faces the headrest support portion 4 described later.

  The headrest 13 is formed with a long hole 13c through which the stay 19 is inserted. The long hole 13c escapes the stay 19 so that the headrest 13 can be rotated back and forth.

  Here, as shown in FIG. 3, the portion corresponding to the headrest 13 in the parcel trim 3 covering the surface of the rear parcel shelf 2 protrudes forward from the back panel 1 and the headrest 13 is used (FIG. 1). The headrest support part 4 to be positioned at is formed. In the headrest support portion 4, the headrest 13 above the pivot shaft 15 whose tip portion 4 a is the tilting center of the headrest 13 in a state where the seatback 12 is located at a predetermined use position (FIGS. 1 and 3). Abutting on the rear surface 13d, the rear tilt of the headrest 13 is restricted. Thereby, when the seat back 12 is locked by the lock mechanism 31 and is located at the use position, the headrest 13 is located at the use position.

  When the seat back 12 is tilted forward and the headrest 13 is separated from the headrest support 4, the headrest 13 is rotated rearward by the urging force of the spring 16 as shown in the solid line in FIG. On the other hand, it is in a falling state (backward falling state).

  The vehicle headrest tilting device 17 includes a seatback 12, a seatback support portion 18, a headrest 13, a spring 16, and a headrest support portion 4. The vehicle headrest tilting device 17 elastically supports the seatback 12 by a spring 16 so that the seatback 12 can be tilted backward, and the headrest 13 is moved by using the rear tilting performed by the entire seatback 12 pushed backward by the occupant C. It comes to tilt forward.

  In such a configuration, the operation of the vehicle headrest tilting device 17 will be described together with the state of the rear seat 10. As shown in FIG. 1, in the normal operation state, the seat back 12 of the rear seat 10 is erected (use position). At this time, as shown in FIG. 3 and FIG. 6A, the lock mechanism 31 has the striker 32 engaged with the notch 37 a of the latch plate 37 and the engagement piece 38 engaged with the striker 32. The seat back 12 is prevented from being tilted forward.

  In the normal operation state, the seat back 12 of the rear seat 10 is kept elastically supported by the compression spring 30 and maintains a gap with the back panel 1. At this time, the headrest 13 of the rear seat 10 urged to rotate backward by the spring 16 is in contact with the headrest support portion 4 and is located at the use position.

  Next, as shown in FIG. 6 (b), when the automobile collides rearward and a dynamic load acting on the seat back 12 of the rear seat 10 acts on the seat back 12 of the rear seat 10 by the inertial force I generated in the occupant C, Tilts backward while compressing the compression spring 30. At this time, the upper body of the occupant C moves rearward together with the seat back 12, but the headrest 13 of the rear seat 10 is in contact with the headrest support 4 and the rearward movement is restricted. The headrest 13 tilts forward with respect to the seat back 12. That is, the headrest support portion 4 uses the rearward tilt performed by the seat back 12 pushed backward by the occupant C to move the portion of the headrest 13 above the tilt center of the headrest 13 forward. The headrest 13 is tilted forward. Specifically, the headrest support 4 moves the portion of the headrest 13 above the tilt center of the headrest 13 forward while in contact with the rear surface 13 d of the headrest 13 above the tilt center of the headrest 13.

  For this reason, the headrest 13 is moved in a direction close to the occipital head Ca of the occupant C that moves backward together with the seat back 12, and the distance L between the occipital head Ca of the occupant C and the headrest 13 is shortened. The head Cb can be prevented from moving backward greatly. Therefore, in the present embodiment, it is possible to suppress the displacement amount of the head Cb of the occupant C at the time of the rear collision of the vehicle.

  In the present embodiment, the entire seat back 12 of the rear seat 10 that is elastically supported so as to be able to tilt backward functions as a pressure receiving portion that receives a load from the occupant C in order to move the headrest 13 forward during a rear-end collision of the vehicle. Therefore, it is not necessary to provide a special mechanism inside the seat back 12, and an increase in cost can be suppressed. That is, according to the present embodiment, the amount of displacement of the head Cb of the occupant C can be suppressed at the time of a rear collision of the vehicle while suppressing an increase in cost with a relatively simple configuration.

  Further, as described above, in the present embodiment, the headrest support portion 4 protrudes forward from the back panel 1 as the rear wall of the passenger compartment, and the front end portion 4a of the headrest support portion 4 is the rear surface of the headrest 13. 13d is contacted. Therefore, since the rear surface of the headrest 13 does not need to protrude rearward in order for the headrest support 4 and the headrest 13 to come into contact with each other, the structure of the headrest 13 can be further simplified.

  In the present embodiment, the seat back support portion 18 is a lock mechanism 31 that is a holding member, and an elastic member that elastically supports the lock mechanism 31 so that the seat back 12 can be tilted backward from the use position. A compression spring 30. Therefore, since the seat back support portion 18 is configured using the lock mechanism 31, the configuration of the vehicle headrest tilting device 17 is simplified as compared with the case where the seat back support portion and the lock mechanism are provided separately. can do.

  In this embodiment, since the reinforcing plate 13b is provided in the rear portion of the headrest 13 of the rear seat 10 that faces the headrest support portion 4, the headrest 13 receives a large reaction force from the headrest support portion 4 due to the large biasing force of the spring 16. Even when it is received, the reaction force can be received by the reinforcing plate 13b, so that the deformation of the headrest 13 can be prevented and the function as an active headrest can be reliably exhibited.

  Further, in the present embodiment, the seat back 12 of the rear seat 10 can be tilted forward, so that the folded seat is obtained by folding the seat back 12 so as to overlap the upper surface of the seat cushion 11 as shown in FIG. The upper surface of the back 12 can be effectively used as a luggage placement surface. At this time, the lock mechanism 31 is provided on the back surface of the seat back 12 so that the standing seat back 12 can be prevented from being naturally tilted forward. The compression spring 30 is connected to the striker 32 of the lock mechanism 31. Since it arrange | positions between the back panels 1, the compression spring 30 can be accommodated compactly using the locking mechanism 31. FIG.

  Further, in the present embodiment, as shown in FIG. 2, when the seat back 12 of the rear seat 10 is tilted forward, the headrest 13 is rotated backward as shown by the arrow K and automatically set to the backward tilted state. Is done. Here, in this embodiment, each part is set so that the headrest 13 can move the seat back 12 of the rear seat 10 forward without interfering with the back surface of the seat back 22 of the front seat 20. For this reason, it is possible to save the trouble of removing the headrest 13 each time the seat back 12 is moved forward.

  Further, in the present embodiment, when the seat back 12 of the rear seat 10 is raised from the forward-turned state, when the seat back 12 is raised to the vicinity of the back panel 1, first, as shown in FIG. The upper end portion of the headrest 13 that has fallen into contact with the headrest support portion 4. When the seat back 12 is further rotated rearward from the state, the headrest 13 is moved by the urging force of the spring 16 (see FIG. 3) while being restricted by the headrest support 4 as shown in FIG. 7B. Rotate forward against it. As the seat back 12 is further rotated backward, as shown in FIG. 7C, the seat back 12 is locked to the lock mechanism 31 and set to the normal operation state, and the headrest 13 is also moved to the headrest support 4. Wake up and set to use position. Therefore, the operation for setting the headrest 13 to the use position is easy.

  Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof is also omitted. FIG. 8 is a side view showing the headrest of the rear seat in the present embodiment, and FIG. 9 is a perspective view showing the headrest of the rear seat as seen from the oblique rear side.

  The rear seat 10 of the present embodiment is different from the first embodiment in the reinforcing portion of the headrest 113. The reinforcing part of the headrest 113 of this embodiment is a U-shaped reinforcing material 113b provided in the headrest body 13a.

  As shown in FIGS. 8 and 9, the U-shaped reinforcing material 113 b is formed in a substantially inverted U shape as a whole, and is curved along the vicinity of the rear surface 13 d of the headrest 113. As shown in FIG. 9, the U-shaped reinforcing member 113 b has an open lower end portion connected to the rotation support shaft 15.

  In such a configuration, the U-shaped reinforcing member 113b, when the headrest 113 receives a large reaction force from the headrest support portion 4 as well as the reinforcing plate 13b of the first embodiment, Since it can be received by the reinforcing material 113b, deformation of the headrest 113 can be prevented and the function as an active headrest can be reliably exhibited.

  Next, a third embodiment of the present invention will be described with reference to FIGS. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof is also omitted. FIG. 10 is a side view showing the rear seat in the present embodiment, and FIG. 11 is a side view showing the rear seat at the time of a rear collision.

  In the present embodiment, the headrest 213 of the rear seat 10 constituting the vehicle headrest tilting device 17 and the headrest support portion 204 are different from those of the first embodiment.

  The headrest 213 of the rear seat 10 is provided with a headrest protrusion 213e that protrudes rearward at a portion above the center of tilting of the headrest 213. On the other hand, a portion facing the headrest 213 in the back panel 1 is a headrest support portion 204. The headrest support part 204 is formed in a planar shape. The headrest support portion 204 is configured to abut the tip portion 213f of the headrest protrusion 213e in the headrest 213.

  In such a configuration, in the normal operation state, as shown in FIG. 10, the headrest 213 of the rear seat 10 is in contact with the headrest support portion 204 and is located at the use position. On the other hand, when the vehicle collides rearward, as shown in FIG. 11, the headrest 213 that is in contact with the headrest support portion 204 and is restricted from moving backward is occupant C ( The vehicle is tilted forward with respect to the seat back 12 by the inertial force I generated in FIG. Therefore, even in the present embodiment, similarly to the first embodiment, the displacement amount of the head Cb of the occupant C (refer to FIG. 6) can be suppressed at the time of a rear collision of the automobile.

  As described above, in the present embodiment, the headrest 213 is provided with the headrest protrusion 213e, and the tip 213f of the headrest protrusion 213e is in contact with the headrest support 204. Therefore, there is no need to project the headrest support portion 204 forward for contact between the headrest support portion 204 and the headrest 213, so that the structure of the headrest support portion 204 can be simplified.

  In addition, although this invention was demonstrated taking the example to said each embodiment, it is not restricted to these embodiment, Various embodiments can be employ | adopted in the range which does not deviate from the summary of this invention. For example, the present invention is applied to the rear seat 10 of a vehicle including the front seat 20 and the rear seat 10, but the present invention can also be applied to the front seat 20, and only the front seat 20 is used as a seat. For example, the present invention may be applied to a vehicle such as a sports car or a truck.

  Moreover, in the said embodiment, although the compression spring 30 was provided in the back panel 1, this invention is not limited to this. For example, a plate projecting to the side of the seat back 12 is provided on the side of the seat back 12, and one end of the spring is fixed to the plate, and the other end of the spring is brought into contact with the back panel 1, so that the plate and the back A spring may function as a compression spring between the panel 1 and the seat back 12 may be elastically supported by this spring.

The side view which shows the arrangement | positioning state of the vehicle seat apparatus installed in the vehicle interior in the 1st Embodiment of this invention. FIG. 3 is a side view showing a state in which the rear seat back in the first embodiment of the present invention is tilted forward. The side view which shows the internal structure of the backseat in the 1st Embodiment of this invention. The disassembled perspective view which shows the vehicle body side part of the locking mechanism of the rear seat in the 1st Embodiment of this invention. The perspective view which shows the headrest of the rear seat in the 1st Embodiment of this invention seeing from diagonally back. The side view which shows the relationship between the seat back of a backseat and a headrest in order of (a) and (b) in order in the normal driving | running state and the time of a rear collision in the 1st Embodiment of this invention. The side view which shows the behavior of the headrest in order from (a) to (c) when the seat back of the rear seat in the first embodiment of the present invention is erected from the front-down state. The side view which shows the headrest of the rear seat in the 2nd Embodiment of this invention. The perspective view which shows the headrest of the rear seat in the 2nd Embodiment of this invention seeing from diagonally back. The side view which shows the backseat in the 3rd Embodiment of this invention. The side view which shows the rear seat at the time of the rear surface collision in the 3rd Embodiment of this invention.

Explanation of symbols

1 Back panel (rear wall)
4 Headrest Support 4a Tip 12 Seatback 13 Headrest 13d Rear 13b Reinforcement Plate (Reinforcement)
16 Spring (biasing member)
17 Vehicle headrest tilting device 18 Seat back support 30 Compression spring (elastic member)
31 Locking mechanism (holding member)
32 striker 33 latch (engagement member)
113b U-shaped reinforcement (reinforcement part)
204 Headrest support part 213 Headrest 213e Headrest protrusion part 213f Tip part C Crew Crew Rear part of head

Claims (9)

  A headrest that can support the back of the occupant is supported by elastically supporting the seat back that can support the back of the occupant so that the seat back can be tilted backward, and using the back tilt performed by the entire seat back that is pushed backward by the occupant. A vehicle headrest tilting device characterized by tilting. A seat back that can tilt backward and support the back of the occupant;
A seat back support portion that elastically supports the seat back so as to tilt backward;
A headrest that is mounted on the upper end of the seat back so as to be tiltable forward and can support the back of the occupant;
A biasing member that biases the headrest in the backward tilt direction;
The headrest is moved forward by moving a portion of the headrest above the tilting center of the headrest using a rearward tilt performed by the seat back that is provided on the vehicle body and pushed backward by an occupant. Tilting headrest support,
A vehicle headrest tilting device comprising:   The headrest support part moves forward a portion of the headrest above the tilt center of the headrest in a state in contact with the rear surface of the headrest above the tilt center of the headrest. Item 3. The vehicle headrest tilting device according to Item 2.   4. The vehicle headrest tilting device according to claim 3, wherein the headrest support portion protrudes forward from a rear wall of the passenger compartment, and a front end portion of the headrest support portion abuts against a rear surface of the headrest. The headrest is provided with a headrest protruding portion protruding rearward at a portion above the tilt center of the headrest,
The vehicular headrest tilting device according to claim 3, wherein a distal end portion of the headrest protruding portion is in contact with the headrest support portion. The seat back support is
A holding member for holding the seat back in a use position;
An elastic member that elastically supports the holding member so that the seat back can be tilted backward from the use position;
The vehicle headrest tilting device according to any one of claims 2 to 5, wherein the vehicle headrest tilting device is provided. The seat back can be tilted forward from the use position,
The holding member includes an engagement member provided on the seat back, and a striker provided on a vehicle body and detachable from the engagement member.
The vehicle headrest tilting device according to claim 6, wherein the striker is elastically supported by the elastic member.   When the seat back is tilted forward and the headrest is separated from the headrest support portion, the headrest is rotated backward with respect to the vehicle by the urging force of the urging member, and is in a state of being tilted with respect to the seatback. The vehicle headrest tilting device according to claim 7.   The vehicle headrest tilting device according to any one of claims 3 to 5, wherein the headrest has a reinforcing portion at a rear portion facing the headrest support portion.

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