JP2574397Y2 - Vehicle seat device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat device provided with a child seat in a seat back portion so as to be retractable and removable, and a seat belt for restraining an occupant sitting in the child seat.

[0002]

2. Description of the Related Art In recent years, in a vehicle seat apparatus, a child seat is provided in a seat back portion of a fixed rear seat so as to be stored in the seat back side when not in use and to be taken out from the seat back to a seat cushion side in use. Attempts have been made to provide a seat belt for a child seat while being fixed to the seat back (for example, see Japanese Utility Model Publication No. Sho 54-17924 and Japanese Utility Model Publication No. Sho 54-17925).

[0003]

When the seat back is of a fixed type as in this known example, the load applied to the seat belt is always directly supported by the vehicle body via the seat back. The use of the seat belt is not limited by the condition of the seat back, and the seat belt and the child seat can be used whenever necessary.

[0004] However, when the seat back into which the child seat is incorporated is of a retractable type, the use of the child seat and the child seat belt is restricted depending on whether the seat back is fixed to the vehicle body by a seat lock device. . That is, in the case of a retractable seat back, the seat back is fixed or released to the vehicle body side by a seat lock device, and the child seat belt is fixed to the retractable seat back side. Therefore, the load applied to the seat belt is supported from the seat back to the vehicle body via the seat lock device. Therefore, it is necessary to prevent the use of the child seat and the child seat belt when the seat lock device is locked off.

[0005] However, as far as the inventor of the present application knows, there is no child seat incorporated in a retractable seat back and a seat belt for a child seat is further provided therein. No useful proposal has been made with respect to means for ensuring safety in use of a child seat and a child seat belt in a vehicle seat device provided with a vehicle seat.

SUMMARY OF THE INVENTION The present invention has been made to secure safety in use of a child seat and a seat belt in a vehicle seat device provided with a retractable seat back incorporating a child seat.

[0007]

According to the present invention, as a specific means for solving the above-mentioned problem, a position between a use position which is substantially in an upright state and a falling position which is inclined forward of the vehicle body from the use position is described. In the front of the seat back that can be turned upside down, a storage position where the child seat is buried and stored in the seat storage section formed on the front of the seat back, and when the child seat is taken out of the seat back and placed on the seat cushion Between the lock-on state in which the seat back is fixed to the vehicle body in the use position and the lock-off state in which the seat back is detached from the vehicle body to allow the tilting operation. A seat lock device equipped with a striker hook that operates with the seat back, and a belt fixed to the back side of the seat back frame on the seat back In a vehicle seat device provided with a seat belt which is extended from a tractor and one end of which bypasses an upper portion of the seat back frame and is fixed to a lower end portion of the seat back frame through a front of the seat storage portion, An operation restricting mechanism for permitting or preventing a tractor seat belt extending operation, and a seat belt of the belt retractor when the striker hook is set to a lock-on position by displacement of the striker hook of the seat lock device. When the striker hook is set at the lock-off position, the operation restricting mechanism is controlled in accordance with the operation state of the seat lock device so as to restrict the seat belt extending operation of the belt retractor when the striker hook is set at the lock-off position. Interlock mechanism to control It is characterized in that was.

[0008]

According to the present invention, when the seat lock device is in the lock-on state, the restricting mechanism allows the belt retractor to extend the seat belt when the seat lock device is in the lock-on state. It is made possible to use it by pulling it out and using a child seat. On the other hand, when the seat lock device is in the lock-off state, the belt retractor prevents the seat belt from being extended by the regulating mechanism, so that the seat belt can be taken out from the belt retractor and used. Therefore, the child seat cannot be used.

[0009]

Therefore, according to the vehicle seat device of the present invention, the seat belt can be used only when the support performance is secured, that is, when the seat lock device is in the lock-on state. Correspondingly, the child seat can also be used only when the seat lock device is in the lock-on state, whereby the support of the seat belt load when the child seat and the seat belt are used can be ensured, and the child seat can be used. In addition, despite the configuration in which the seat belt is provided on the retractable seat back side, high safety when using the child seat and the seat belt is ensured.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vehicle seat device according to the present invention will be described in detail with reference to an embodiment. FIGS. 1 and 2 show a main portion of a rear seat 1 for a vehicle according to an embodiment of the present invention. ing. The rear seat 1 is composed of a seat cushion 2 and a seat back 3. The seat back 3 further includes a pair of left and right seat back sides 33, 33 located at both ends in the vehicle width direction and fixed to the vehicle body. The vehicle back-and-forth direction (in the direction of arrows AB) with the lower end portions as fulcrums on the inside of the seat back sides 33, 33 in the vehicle width direction.
The first tiltable seat back 31 and the second tiltable seat back 32 are configured to be capable of tilting. The first retractable seat back 31 and the second retractable seat back 32
Is fixed to the vehicle body side by a seat lock device 50 (see FIG. 4) described later, which is operated by operation buttons 53 arranged on the shoulders thereof (hereinafter, referred to as lock-on state)
Alternatively, it is released (hereinafter referred to as lock-off state),
In the lock-on state, it is set to the use position in a substantially upright state as shown in solid lines in FIGS. 1 and 2, and in the lock-off state, it tilts forward in the vehicle body as shown in a dashed line in FIG. It is set to the lying down position.

Further, in this embodiment, the first
Of the retractable seat back 31 and the second retractable seat back 32, the child seat 4 is provided on the first retractable seat back 31 side.
Is provided so that it can be stored and removed. That is, in the center of the front surface 31a of the first retractable seat back 31, a substantially rectangular recessed sheet storage portion 34 having an upper end inclined is formed. A child seat 4 composed of a first seat portion 41 and a second seat portion 42 continuously and bendably provided at an upper end of the first seat portion 41 is provided on a vehicle body using the lower end portion of the first seat portion 41 as a fulcrum. It is attached so that it can be tilted in the front-rear direction (the direction of arrows AB).

In the storage position, the child seat 4 has a first seat portion 41 as shown in FIG.
The second seat portion 42 is stored in the seat storage portion 34 in a state of being linearly extended, and in this state, the rear surface 4a of the child seat 4 forms the front surface 31a of the first retractable seat back 31. On the other hand, in the use position, as shown in FIG. 2, the second seat portion 42 is placed on the seat cushion 2 in a state where the second seat portion 42 is folded under the first seat portion 41. In, the back surface 41a of the first seat portion 41 is a seating surface for a child. In the storage position, the child seat 4 is provided with the magic tape 23 provided on the sheet storage section 34 side.
The storage state is maintained by bonding the magic tape (not shown) provided on the second sheet portion 42 side with the magic tape.

As shown in FIG. 2, a pair of left and right seat belts (described later) extend between the first retractable seat back 31 and the child seat 4 so as to extend vertically in the seat accommodating portion 34. 5A, 5A are arranged. The seat belts 5A, 5A are attached to the buckle 6 extending from the first seat portion 41 so as to be detachably connected to the tongues 7, 7 provided at the intermediate portions thereof, so as to be stretched to the front side of the seat storage portion 34. Thus, a predetermined holding space is formed between the sheet holding portion 34 and the bottom surface.

On the other hand, the child seat 4 always uses the seat belts 5A, 5A when it is used, and supports the load applied to the seat belts 5A, 5A in the use state of the child seat 4. It is also necessary to ensure the function and to ensure the safety of the occupant child. From this point of view, in this embodiment, even if the child seat 4 can be set to the use position, if the seat lock device 50 is in the lock-off state, the seat belts 5A, 5A themselves are prevented from being pulled out and substantially. The use of the child seat 4 can be prevented, the lock-on or lock-off state of the seat lock device 50 can be directly visually recognized, and a warning is issued to the child seat 4 withdrawal operation in the lock-off state. The use of the child seat 4 is allowed only when the seat lock device 50 is securely in the lock-on state and the belt load of the seat belts 5A, 5A can be reliably supported on the vehicle body side. Specifically, the seat lock device 5
The operation of the belt retractor 8 is mechanically controlled according to the operation state of 0, and a predetermined display is performed.

Hereinafter, first, the specific structure of the first retractable seat back 31 and the child seat 4 will be described with reference to FIG. 3, and then the seat lock device 50 will be described with reference to FIGS. The configuration and operation of each mechanism related thereto will be described.

[0016] First Allowed credit seat back 31 and the like Figure 3, the overall configuration of the first accepted credit seat back 31 and the child seat 4 and the seat belt 5 is shown. The first retractable seat back 31 is formed in a rectangular frame shape with a pipe body, and a substantially rectangular plate body is attached to the seat back frame 10 to which a rectangular frame frame plate 11 is attached on the back side. A pad 13, a trim 14 for enclosing the pad 13, and a putting 15 are sequentially attached to a frame to which a backrest plate 16 is attached. The first retractable seat back 31 is capable of tilting in the vehicle front-rear direction by pivotally supporting both lower ends of the seat back frame 10 toward the vehicle body.

The child seat 4 is formed by connecting brackets 17a, 17a formed at the base end of a rectangular booster plate 17 to brackets 20, 20 provided on both lower ends of the backrest plate 16 with bolts 21, 21. The backrest plate 16 can be tilted in the direction of contact and separation. Then, the first pad 18 a and the second pad 1, which can be bent mutually, are provided on the booster plate 17.
8b and trim 19 for enclosing the same
And the child seat 4 is configured.

The seat belts 5A, 5A have one ends fastened to the brackets 20, 20 of the backrest plate 16 together with the booster plate 17 by means of the bolts 21, 21 via belt anchors 9, 9, respectively. The other end is connected to a seat belt 5B which is pulled out from a belt retractor 8, which will be described later, after being pulled out to the upper end side of the seat back frame 10 through the trim 14 and the pad 13 and pulled out as necessary. The belt is retracted by the belt retractor 8. The tongues 7, 7 attached to the seat belts 5A, 5B are detachably connected to the buckle 6 extending from the booster plate 17 side.

As shown in FIGS. 5 and 6, the belt retractor 8 winds the seat belt 5B around a winding shaft 8b constantly urged in a belt winding direction by a spring (not shown). The bracket 8a is attached to the backrest plate 16 by bolting the brackets 8a to bosses 22 formed on the lower rear surface of the backrest plate 16. The winding shaft 8
A latch mechanism 45 is attached to the end of b. The latch mechanism 45 constitutes an operation restricting mechanism in the scope of claims for utility model registration.
And a latch claw 47 pivotally supported by the bracket 8a side so as to be swingable and constantly urged by a spring 48 in a direction to mesh with the latch gear 46. One end of a first cable 25A, the other end of which is connected to the seat lock device 50 as described later, is connected to the latch claw 47. The latch mechanism 45 applies a tension to the first cable 25A. In a state where it is not performed, the latch pawl 47 meshes with the latch gear 46 by the urging force of the spring 48 to restrict the rotation of the winding shaft 8b in the belt pull-out direction (that is,
The seat belt 5B is restricted from being pulled out).
When the cable 25A is pulled, the engagement between the latch claw 47 and the latch gear 46 is released, and the winding shaft 8 is disengaged.
a is allowed to rotate (that is, the seat belt 5B can be pulled out). The first cable 25A is pushed and pulled in accordance with an operation state of a seat lock device 50 described later.

The seat lock device 50 such as the seat lock device 50 is mounted on the lock mounting base plate 12 fixed to the shoulder of the seat back frame 10 as described above.
As shown in FIG. 5, a catch mechanism 51 described later is attached to a catch bracket 60 fixed to the lock mounting base plate 12 with the receiving groove 55 opened toward the seat rear side.
It is configured by incorporating.

The catch mechanism 51 has a striker receiving groove 63 having a U-shape and a striker hook 61 pivotally supported by a pin 71 so as to be rotatable with respect to the catch bracket 60 in the directions of arrows ab. One end of the catch bracket 60 is rotatably supported via a pin 72 and engages with the engaging portion 61 a formed on the striker hook 61 to thereby form the striker hook 6.
1 is provided with a stopper claw 62 for holding the posture at a lock-on position shown by a solid line in FIG. Further, the first stopper claw 62 is moved by a spring 64 as shown in FIG.
And the pin 73 provided thereon is connected to the operating rod 52 disposed vertically in the first retractable seat back 31, and the stopper pawl is provided. The operation rod 52 is forcibly rotated in the disengagement direction by depressing the operation rod 52 by a pressing operation of an operation button 53 (see FIG. 3) provided at the upper end thereof, and the striker hook 61 is shown in dashed lines in FIG. Set to the lock-off position. The rotation of the striker hook 61 from the lock-off position to the lock-on position means that the striker hook 61 comes into contact with the striker 54 when the first retractable seat back 31 is operated from its lying position to the use position side. This is automatically performed by the above operation, and the posture is held at the lock-on position by the stopper claw 62.

On the other hand, since the striker hook 61 is rotationally displaced between the lock-on position and the lock-off position as described above, the rotational displacement of the striker hook 61 is controlled by the operation of the latch mechanism 45 and the like. In order to use the same, the striker hook 61 is formed with a cable hooking portion 66 protruding to the side thereof, and the cable hooking portion 66 has two cables of a first cable 25A and a second cable 25B. One end is connected to each.

The two cables 25A, 25
B, the other end of the first cable 25A is connected to the latch claw 47 of the latch mechanism 45. Therefore, when the seat lock device 50 is in the lock-on state, the first cable 25A is pulled and the latch claw 47 is disengaged from the latch gear 46, so that the seat belt 5B can be pulled out. When the seat lock device 50 is in the lock-off state, no tension acts on the first cable 25A, so that the latch pawl 47 meshes with the latch gear 46, thereby preventing the seat belt 5B from being pulled out.

For this reason, after taking out the child seat 4, the occupant first pulls out the seat belts 5A, 5A, and if it can be pulled out, the child seat 4 may be set to the use position and used as it is. Conversely, if the seat belts 5A, 5A cannot be pulled out, the child seat 4 may be used after the lock-on operation of the seat lock device 50 is performed. When the lock-on / off-state of the seat lock device 50 is confirmed based on whether or not the pull-out operation of the seat belts 5A and 5B is performed, the child seat 4 is used in the lock-off state of the seat lock device 50. Safety is ensured. In this embodiment, the first cable 2
5A corresponds to the interlocking mechanism in the claims for utility model registration.

On the other hand, the other end of the second cable 25B is connected to a display mechanism 36 described later. This display mechanism 36
As shown in FIGS. 1 and 7, the operating rod 52 protrudes from the shoulder of the first retractable seat back 31.
And a case 37 attached to the shoulder so as to guide the head. The case 37 has a display window 37a of a predetermined size formed on the side surface on the front side of the seat, and a fixing plate 38 colored green, for example, inside the display window 37a, and a red plate colored red, for example. The movable plate 39 is connected to the display window 3.
It is arranged so as to be located near 7a. Further, the movable plate 39 is constantly urged upward by a spring 40 contracted between the movable plate 39 and a bracket 35 fixed to the lock mounting base plate 12, and one end of the second cable 25B is connected thereto. I have.

Accordingly, when the seat lock device 50 is in the lock-off position, no tension acts on the second cable 25B, so that the movable plate 39 is urged upward by the spring force of the spring 40, and 3
The movable plate 3 colored in red is displayed on the display window 37a of FIG.
9 faces. On the other hand, when the seat lock device 50 is set to the lock-on position, the second cable 25
Since B is pulled, the movable plate 39 is pulled down, and the fixed plate 38 colored green faces the display window 37a. That is, the window 37a of the case 37
When the seat lock device 50 is in the lock-on position, a green display is provided, and when the seat lock device 50 is in the lock-off position, a red display is provided. The seat lock device 50 is locked on by visually checking the color display of the window 37a.
(That is, the child seat 4 can be used)
, Or in a lock-off state (that is, a state in which the use of the child seat 4 is prohibited) .For example, in the case of red display, if you want to use the child seat 4, After setting the seat lock device 50 to the lock-on position, the operation shifts to the operation of the child seat 4, whereby the use of the child seat 4 in the lock-off state is prevented beforehand and reliably.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a vehicle seat device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where a child seat is taken out in the vehicle seat device shown in FIG. 1;

FIG. 3 is an exploded perspective view of a main part of the vehicle seat device shown in FIG. 1;

FIG. 4 is an enlarged front view of the seat lock device shown in FIG. 3;

FIG. 5 is an enlarged perspective view of a seat belt portion shown in FIG.

FIG. 6 is an explanatory diagram of an internal structure of a belt retractor shown in FIG. 5;

FIG. 7 is an enlarged perspective view of a display mechanism shown in FIG. 3;

[Explanation of symbols]

1 is a rear seat, 2 is a seat cushion, 3 is a seat back, 4 is a child seat, 5 is a seat belt, 6 is a buckle, 7 is a tongue, 8 is a belt retractor, 9 is a belt anchor, 10 is a seat back frame, and 11 is a seat back frame. Frame-shaped plate, 12 is a lock mounting base plate, 13
Is a pad, 14 is a trim, 15 is a putting, 16 is a back plate, 17 is a booster plate, 18 is a pad, 19 is a trim, 20 is a bracket, 21 is a bolt,
23 is a magic tape, 25 is a cable, 31 is a first retractable seat back, 32 is a second retractable seat back, 33 is a seat back side, 34 is a sheet storage section, and 41 is a first retractable seat back.
A seat portion, 42 is a second seat portion, 45 is a latch mechanism, 4
6 is a latch gear, 47 is a latch claw, 48 is a spring,
50 is a seat lock device, 51 is a catch mechanism, 52 is an operation rod, 53 is an operation button, 54 is a striker,
55 is a receiving groove, 60 is a catch bracket, 61 is a striker hook, 62 is a stopper claw, 63 is a striker receiving groove, 64 and 65 are springs, 66 is a cable hook, and 71 and 72 are pins.

Claims (1)

(57) [Scope of request for utility model registration] A child seat is provided on a front surface of a seat back which can be turned between a use position which is substantially in a standing state and a fall position which leans forward from the use position. The seat back is attached so that the posture can be changed between a storage position where the seat back is buried and stored in the seat storage portion and a use position where the seat back is taken out of the seat back and placed on the seat cushion. A seat lock device provided with a striker hook that operates between a lock-on state fixed to the vehicle body side in a use position and a lock-off state detached from the vehicle body side and allowing its tilting operation, and further provided on the seat back. Is pulled out from the belt retractor fixed to the back side of the seat back frame, and one end of the A seat belt fixed to a lower end portion of the seat back frame through a front of the seat storage portion so as to bypass the seat portion, wherein a seat belt extending operation of the belt retractor is allowed or prevented. When the striker hook is set to the lock-on position in response to the displacement of the striker hook of the seat lock device, the seat retractor of the belt retractor is allowed, and the striker hook is moved. An interlocking mechanism that controls the operation restricting mechanism in accordance with the operation state of the seat lock device so as to restrict the seat belt feeding operation of the belt retractor when the belt retractor is set at the lock-off position. Characteristic vehicle seat device.