JP2004306642A - Vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve wearing workability of a seat belt, and to simplify a device. <P>SOLUTION: In the vehicular seat, a drawing-out port 27A for drawing out an outer belt 38 is opened to an upper part side of a vehicular outside portion 27 of a seat back 25, and a storing recessed portion 50 is formed thereunder. In the storing recessed portion 50, a bellows-shaped expanding/contracting cylinder 81 attached with a moving piece 77 at a tip end thereof is provided. The expanding/contracting cylinder 81 is expanded by air supply to push out the moving member 77, thereby lifting the outer belt 38 from the vehicular outside portion 27 of the seat back 25. When air in the expanding/contracting cylinder 81 released while the outer belt 38 is lifted, the expanded expanding/contracting cylinder 81 automatically returns the moving member 77 into the storing recessed portion 50 so as to return to a contracted natural state. Therefore, the expanding/contracting cylinder 81 can have both of a function expanding by storing air inside and a function returning the moving member 77, and the structure is simplified. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle seat integrated with a seat belt.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is known a vehicle in which a seat belt is provided integrally with a seat provided in a vehicle (for example, Patent Document 1).
In this device, a seat body including a seat back and a seat cushion is provided, and a retractor for rewinding a belt is incorporated in the seat back, and a leading end portion of the seat belt is provided on an upper side of the seat back. It is pulled out from the mouth (opening).
On the other hand, a belt fixing device (lower anchor) is provided on the seat cushion side, and a leading end portion of the pulled out seat belt is fixed here. Thus, the seat belt is disposed vertically on the front side of the seat back side.
[0003]
[Patent Document 1]
Japanese Utility Model Application Laid-Open No. 5-76913 [0004]
[Problems to be solved by the invention]
According to the above-mentioned structure, the seat belt is always made to conform to the surface of the seat back in consideration of the appearance when not in use, getting on and off, and the like. Therefore, the seat belt is difficult to grasp, and the workability at the time of wearing (particularly, the operation of pulling out the seat belt from the outlet) has not been sufficiently improved.
The present invention has been completed based on the above-described circumstances, and has as its object to improve seat belt mounting workability.
[0005]
[Means for Solving the Problems]
As means for achieving the above object, the invention according to claim 1 comprises a seat back and a seat cushion, and an upper portion of one of the left and right sides of the seat back has a passenger restraint. While a shoulder belt support for suspending the seat belt is provided, a lap belt support for fixing the tip of the suspended seat belt is attached to the seat cushion side below the side portion, and these are attached. A seat belt-integrated vehicle seat in which the seat belt is stretched up and down along the surface of the side shoulder by both supports, and the seat belt is provided between the shoulder belt support and the lap belt support. A seat recess is provided in the seat back, and a movable member having a contact surface with the seat belt is provided therein, And a cylindrical body in which air can be stored is disposed therein, and the cylindrical body is extended by supply of air to push the movable member outward from a standby position in the housing concave portion, thereby causing the seat belt to While the air is evacuated while the air is released, the movable member is returned to the standby position by the elasticity of the cylinder itself.
[0006]
According to a second aspect of the present invention, in the first aspect, the seat back or the seat cushion includes an air supply unit that supplies air to the cylindrical body, and a detection unit that detects a seating state of a passenger. And a control unit for operating the air supply unit based on a detection signal from the detection unit.
[0007]
Function and effect of the present invention
<Invention of claim 1>
According to the first aspect of the present invention, the seat belt is always in a state of being along the surface of the side portion of the seat back, so that it has an excellent appearance and does not become an obstacle when getting on and off. In addition, when the seatbelt is worn, if air is supplied, the bellows-shaped cylinder expands and the seatbelt can be lifted from the side. For this reason, the seat belt can be easily grasped by hand, and the wearing property is excellent.
On the other hand, if the air is removed, the movable member automatically returns to the standby position due to the elasticity of the bellows-shaped cylinder. As described above, the cylindrical body has a function of extending the movable member by accumulating the air therein and pushing out the movable member, and a function of returning the movable member.
[0008]
<Invention of Claim 2>
According to the invention of claim 2, when the passenger is seated, the detection means detects this, and the control unit automatically operates (extends and contracts) the air supply means and eventually the cylinder based on the detection signal. As described above, since the moving operation of the movable member is automatically performed, there is no need to perform a dedicated operation manually, and the usability is good.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view of a vehicle seat 20 that is integrally movable with an outer belt applied to the present embodiment. The vehicle seat 20 is applied to, for example, a seat of an automobile (ordinary automobile, van-type vehicle, etc.), and mainly includes a seat cushion 21, a seat back 25, and a slide mechanism 40 that movably supports the entire seat. . In the following description, the front side of the figure is the outside of the vehicle (left side), the opposite side is the inside of the vehicle (right side), and the traveling direction of the vehicle is the front side.
[0010]
In the present embodiment, the seat back 25 integrally forms a headrest 26. The width of the seat back 25 is set wider than that of a normal seat back, and the height of the upper surface is different between the left and right sides of the headrest 26. (Hereinafter, referred to as the vehicle outside portion 27) is higher than the vehicle inside. The retractor 34 is built in the vehicle outside portion 27. The retractor 34 has a built-in winding means therein, and when the outer belt (the seat belt of the present invention) is pulled out, the outer belt 38 is urged in the winding direction against it.
[0011]
A draw-out opening 27A is opened on the upper side of the vehicle outer side portion 27, while a resin cover 23 is attached to the side of the seat cushion 21 and a draw-in opening 23A is opened on the upper surface side. The outer belt 38 drawn out from the drawer port 27A is arranged vertically along the surface of the vehicle outer side portion 27, and the leading end side is drawn into the resin cover 23 through the drawer port 23A.
A metal fitting 39 is loosely inserted into the outer belt 38, while an inner belt 48 is arranged on the side of the seat cushion 21 (on the right side in the figure). The inner belt 48 is provided with a buckle 48B having a receiving portion (not shown) which can be locked with a locking metal member 39 at the tip side of a metal stay 48A, and a lower portion of the stay 48A is a slide described below. It is bolted to the mechanism 40.
[0012]
Next, the skeletal structure of the vehicle seat 20 and the slide mechanism 40 will be described. As shown in FIG. 3, a flat floor-shaped floor base 41 is arranged below the seat cushion 21. The floor base 41 is fixed to a floor panel on the body side, and a pair of parallel fixed rails 42 are arranged on both left and right sides along the front-rear direction. Each of the left and right fixed rails 42 has a fitting groove 42A formed along the longitudinal direction. The fitting groove 42A is formed to penetrate upward and forward and backward, and movable rails 43 and 44 each having a plate shape are slidably fitted in each fitting groove 42A. Both the movable rails 43 and 44 are formed to have the same width from the front end portion to the central portion, and are formed so that the rear portion projects upward from the central portion (hereinafter referred to as overhang portions 43A and 44A). ). The overhanging portions 43A and 44A are for supporting the structural portion of the seat cushion 21, which will be described later in detail.
[0013]
A lap belt support 46 is bolted to the overhanging portion 43A of the movable rail 43 on the outer side of the vehicle between the two movable rails 43 and 44, and the distal end side of the outer belt 38 drawn into the resin cover 23 is fixed. It has become. On the other hand, the stay 48A of the inner belt 48 described above is attached to the overhang portion 44A of the movable rail 44 inside the vehicle. The two movable rails 43 are bridged between the front ends thereof and between the rear ends thereof by connecting pipes 45, and the whole constitutes a support frame.
On the other hand, the back frame 31 forming the skeleton of the seat back 25 is formed by bending a metal pipe into a U-shape, and one end of the back frame 31 is connected to the overhanging portion 43A of the movable rail 43 on the outside of the vehicle via the connecting member 32. The other end is connected to the projecting portion 44A of the movable rail 44 on the indoor side via the connecting member 32 in the same manner. A not-shown reclining mechanism is provided between the connecting member 32 and the overhang portions 43A and 44A, and can adjust the inclination angle of the seat back 25 with respect to the vehicle.
[0014]
A base plate 33 for supporting a movable member 77 to be described later is arranged on the left side of the upper end of the back frame 31. The base plate 33 is formed in a U-shape by providing a pair of opposed mounting walls (the front side is a front wall 33A and the rear side is a rear wall 33B), and is inserted into the back frame 31 from the side. As shown in FIG. 6, the back frame 31 is fixed so as to sandwich the back frame 31 between both walls 33A and 33B.
[0015]
At the lower end of the base plate 33, the above-described retractor 34 for the outer belt is attached. The retractor 34 is provided with an upward belt entrance 34A, and the outer belt 38 is drawn upward from the entrance 34A along the rear wall 33B of the base plate 33. (See Fig. 10)
On the other hand, a shoulder belt support 36 is attached to the upper portion of the rear wall 33B, and the outer belt 38 passes through the shoulder belt support 36. That is, the shoulder belt support 36 has a horizontally long slit 36A formed at a position protruding from above the rear wall 33B. Therefore, the outer belt 38 is turned to the front by passing through the slit 36A, and is thereafter drawn out to the surface side of the vehicle outside portion 27 through the outlet 27A.
[0016]
By the way, as shown in FIG. 4, a through hole 27B having a depth reaching the base plate 33 is formed below the outlet 27A of the seat back 25, and is formed by a front wall 33A of the base plate 33 and a hole wall of the through hole 27B. An accommodation recess 50 is formed. In the housing recess 50, a movable member 77 which can be brought into contact with the outer belt 38 is retracted into the housing recess 50 as shown in FIGS. 6 and 7, and as shown in FIGS. An extruding means 80 for displacing the outer belt 38 between an extruding position where the outer belt 38 is raised above the surface of the vehicle outer side portion 27 and is advanced from the standby position is attached.
[0017]
More specifically, referring to FIGS. 4, 5 and 6, the movable member 77 is provided with a rearward flange 77 </ b> B on the entire edge of a board 77 </ b> A formed in a size that can be fitted into the accommodation recess 50. It is fitted to the accommodation recess 50 so as to be able to advance and retreat with a slight gap. A resin pad 78 is attached to the front surface of the substrate 77A. The surface side of the pad 78 is formed with a gentle curvature, and the left and right sides are formed higher than the center. This is to prevent the belt from shifting when the outer belt 38 is lifted.
[0018]
An annular mounting ring 83 is fixed to the back surface of the substrate 77A by welding. On the other hand, a support bracket 84 integrally formed with a mounting ring 84A having the same shape as the mounting ring 83 on the movable member 77 side is also mounted on the front wall 33A of the base plate 33, so as to bridge between the two rings 83 and 84A. A bellows-shaped hollow telescopic cylinder (corresponding to the cylinder of the present invention) 81 is disposed.
[0019]
The telescopic cylinder 81 is made of, for example, a synthetic resin such as soft vinyl chloride or rubber, and is elastically displaceable. One end of the telescopic cylinder 81 is fitted to the outer surface of the mounting ring 84A of the support bracket 84, and the other end is fitted to the outer surface of the mounting ring 83 of the movable member 77. It is set slightly smaller than the diameter. For this reason, at the time of assembling, the telescopic cylinder 81 is attached to the outer periphery of the mounting rings 83 and 84A by slightly expanding the end of the telescopic cylinder 81 and mounting. The telescopic cylinder 81 is retained by a pair of fasteners 86 attached to both ends thereof. The fastener 86 is formed by bending a metal plate material and has an annular clamp portion 86A that can be fitted into the mounting rings 83 and 84A, and a telescopic cylinder 81 is provided between the mounting ring and each of the clamp portions 86A. Are sandwiched, and the opposite end portions 86B are bolted to each other.
[0020]
The movable member 77, the support bracket 84, and the telescopic cylinder 81 form a closed air storage space capable of storing air therein. In addition, the telescopic cylinder 81 is in a contracted state in which adjacent peaks and valleys are in close contact with each other in a natural state, and urges the movable member 77 in the retracting direction (toward the accommodation recess 50).
[0021]
Next, the stopper pin 65 for regulating the position of the movable member 77 will be described with reference to FIGS.
A rod-shaped stopper pin 65 is attached to the center of the back surface of the substrate 77A of the movable member 77. The stopper pin 65 has a first flange portion 65A and a second flange portion 65B at its distal end portion and central portion, respectively, in addition to a positioning flange portion 65C provided at the base end side. On the other hand, a stopper bracket 67 having a U-shaped cross section is attached to the front wall 33A of the base plate 33 so as to close to the base plate 33 side. The stopper bracket 67 has a through hole sized to penetrate the shaft of the stopper pin 65, and the base plate 33 has a relief hole 33D sized to penetrate the first flange 65A of the stopper pin 65. It is formed penetrating both walls 33A, 33B. Then, when the movable member 77 is pulled into the housing recess 50, the second flange portion 65B is set to abut on the upper surface of the stopper bracket 67, whereby the movable member 77 is stopped at the standby position.
[0022]
As shown in FIGS. 6 and 7, in this standby position, the entire movable member 77 is housed in the housing recess 50, and the front surface of the pad 52 is substantially flush with the vehicle outside portion 27 of the seat back 25, Further, the outer belt 38 extends along the center of the surface of the pad 52.
Although not shown, a rubber seal ring is attached to the through hole of the stopper bracket 67 so as to secure airtightness in the telescopic cylinder 81.
[0023]
Further, when air is supplied into the telescopic cylinder 81 from this state by the air supply means described later, the telescopic cylinder 81 is filled with air, whereby the telescopic cylinder 81 expands and moves the movable member 77 into the housing recess 50. It is more extruded. As shown in FIG. 8, when the movable member 77 reaches the pushing position, the first flange 65A of the stopper pin 65 abuts on the back surface side of the stopper bracket 67 to regulate the position of the movable member 77. Has become. In this pushed-out position, the distal end side of the telescopic cylinder 81 projects from the housing recess 50 so that the movable member 77 and thus the outer belt 38 as a whole are lifted from the surface of the vehicle outer side portion 27.
[0024]
Next, as shown in FIG. 10, the air supply means, that is, the air pump 70, is provided below the base plate 33 with the drive motor 70A attached. On the other hand, an introduction port is opened at one end side (the base plate 33 side) of the telescopic cylinder 81, and the air pump 70 and the telescopic cylinder 81 are connected by a tube 71. Thus, when the drive motor 70 </ b> A is driven, air is supplied from the air pump 70 into the telescopic cylinder 81 via the tube 71.
[0025]
Further, the pushing means 80 includes a control device 72 shown in FIG. In the present embodiment, the control device 72 is mainly composed of an occupant detection pressure sensor (corresponding to detection means of the present invention) 74, a solenoid valve 75, and a control unit 73. 80 is configured to operate automatically. Specifically, as the occupant detection pressure sensor 74, for example, a sheet material made of a piezoelectric element is built in the center portion of the seat cushion 21, and the seat material is set to be distorted by the pressure when the occupant sits. It is good. As a result, an electric signal (electromotive force) corresponding to the amount of distortion is obtained from the piezoelectric element, and the boarding of the occupant can be detected. On the other hand, the solenoid valve 75 is provided along with the tube 71 at the end of the telescopic cylinder 81 and is a normally open type so that air in the telescopic cylinder 81 is always evacuated.
[0026]
Each drive circuit (not shown) of the solenoid valve 75 and the drive motor 70A is provided with an electromagnetic relay, and both the electromagnetic relay and the pressure sensor 74 are connected to the control unit 73 via signal lines. The control section 73 is set so as to activate each electromagnetic relay and energize each drive circuit based on a detection signal (occupant detection) from the pressure sensor 74. Thus, when the occupant is detected, the solenoid valve 75 is closed, and the air pump 70 starts supplying air.
[0027]
The drive motor 70A is controlled by the control unit 73 so as to stop after the movable member 77 reaches the pushing position, and the solenoid valve 75 is automatically turned on when a predetermined time elapses after the valve is closed. Is controlled to open. The reason for performing such control is to automatically return the movable member 77 at the push-out position to the standby position after the passenger completes wearing the outer belt 38.
The control method of the drive motor 70A is such that the operation is switched (on / off) by detecting the pressure of the telescopic cylinder 81, the on-time is controlled in advance, and the power is automatically turned off after a lapse of a predetermined time. It may be of a type that switches to a state.
[0028]
Next, the operation and effect of the present embodiment will be described while describing the procedure in which the passenger gets on the vehicle and fastens the seat belt.
First, when the passenger is not in the vehicle, as shown in FIGS. 6 and 10, the movable member 77 is in the standby position in the accommodation recess 50 and is further urged by the retractor 34 in the winding direction. Thus, the outer belt 38 is in a state of being attached to the surface of the outer side portion 27 of the seat back 25 with a slight tension. In this standby position, the solenoid valve 75 is open, the telescopic cylinder 81 is in a contracted state in which adjacent peaks and valleys are in close contact with each other, and biases the movable member 77 in the retracting direction (toward the accommodation recess 50). It is in a state of having done.
[0029]
When the user gets into the vehicle and sits on the vehicle seat 20 from this state, the seat cushion 21 is pushed by the weight of the passenger, and the central portion of the seat cushion 21 is depressed. This causes distortion in the built-in pressure sensor 74, which is detected as an electric signal and transmitted to the control unit 73. Then, the control unit 73 closes the electromagnetic relay, energizes the motor drive circuit to operate the drive motor 70A, and closes the solenoid valve 75. As a result, air is supplied from the air pump 70 into the telescopic cylinder 81, so that the telescopic cylinder 81 gradually expands forward and pushes the movable member 77 out of the housing recess 50.
[0030]
Eventually, when the movable member 77 reaches the pushing position shown in FIGS. 8 and 11, the forward movement of the movable member 77 is restricted by the second flange 65 </ b> B of the stopper pin 65 abutting against the back surface of the stopper bracket 67. Is done. Then, when the pressure of the telescopic cylinder 81 reaches a predetermined value, the control unit 73 cuts off the power supply to the drive motor 70A and stops the air supply. At this time, since the solenoid valve 75 is in a closed state, the inside of the telescopic cylinder 81 is in a state of being filled with air, and the movable member 77 is held at the same position by the tension of the telescopic cylinder 81.
[0031]
In this pushed-out position, the outer belt 38 is pushed forward by the movable member 77, and is entirely floating above the surface of the vehicle outer portion 27, that is, a state in which a finger easily enters the rear surface side of the outer belt 38. Therefore, the passenger can easily grasp the outer belt 38 by hand without feeling troublesome. Thereafter, the outer belt 38 is pulled out from the outlet 27A, and the locking fitting 39 is locked to the buckle 48B of the inner belt 48. With this, the wearing of the seat belt is completed.
[0032]
When a predetermined time elapses after the supply of the air into the telescopic cylinder 81 is interrupted (a time sufficient for the passenger to wear the belt), the control unit 73 cuts off the power supply to the solenoid valve 75 side. The dripping solenoid valve 75 is opened. As a result, the air in the telescopic cylinder 81 is released. Then, the telescopic cylinder 81 having lost the tension urges the movable member 77 in the retracting direction by its own spring force, and stores the movable member 77 at the standby position in the accommodation recess 50.
[0033]
As described above, according to the present embodiment, the seat belts (the outer belt 38 and the inner belt 48) for restraining the passenger are all completed in the vehicle seat 20. Therefore, regardless of the sliding position of the seat, the passenger can be restrained under the same conditions, and the safety is excellent.
Further, when the outer belt 38 is mounted, if the air is supplied to the telescopic cylinder 81, the outer belt 38 can be floated from the seat back 25, so that the mounting operation can be easily performed. On the other hand, if the air is released, the movable member 77 is automatically returned to the standby position in order to return the telescopic cylinder 81 to the contracted natural state. In this manner, the telescopic cylinder 81 has a function of extending the movable member 77 by accumulating air therein and pushing out the movable member 77, and a function of pulling the movable member 77 into the housing recess 50 by its spring force, so that the structure is simple.
[0034]
The mechanism for moving the movable member 77 in and out is exposed from the surface of the sheet at the push-out position. However, since the mechanism is constituted by the telescopic cylinder 81, cushioning can be provided. Therefore, even if an external force is applied, it is strong against impact and also prevents harm to passengers.
Further, the pushing means 80 is provided with a control device 72, which detects the occupant's occupancy and automatically performs the movement of the movable member 77 in and out, which is convenient.
[0035]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and furthermore, besides the following, within the scope not departing from the gist. Can be implemented with various modifications.
[0036]
(1) In the present embodiment, the present invention is applied to the seat provided with the slide mechanism 40, but may be applied to a fixed seat.
[0037]
(2) In the present embodiment, the return from the push-out position to the standby position is performed by using the elasticity of the telescopic cylinder 81. In addition, a spring or the like may be additionally provided. In this case, For example, as shown in FIGS. 13 and 14, the coil spring 90 may be arranged coaxially inside the telescopic cylinder 81.
[0038]
(3) In the present embodiment, the position of the movable member 77 is mechanically controlled, but may be controlled by the control device 72.
[Brief description of the drawings]
FIG. 1 is a perspective view of a vehicle seat according to an embodiment of the present invention. FIG. 2 is a perspective view of the vehicle seat showing a state in which a seat belt is lifted from an outer side of the vehicle. FIG. FIG. 4 is a perspective view showing a relationship between the pushing means and the seat back. FIG. 5 is an exploded perspective view of the pushing means. FIG. 6 is a horizontal sectional view showing a standby position of the movable member. FIG. FIG. 8 is a vertical sectional view showing a pushing position of a movable member. FIG. 9 is a vertical sectional view showing a pushing position of a movable member. FIG. 10 is a longitudinal sectional view of a vehicle seat. Shows the state at the standby position)
FIG. 11 is a vertical cross-sectional view of the vehicle seat (showing a state where the movable member is in the pushing position).
FIG. 12 is a block diagram of a control device; FIG. 13 is a horizontal sectional view showing a state where a movable member is at a standby position (other embodiment);
FIG. 14 is a horizontal cross-sectional view showing a state where the movable member is at the pushing position (another embodiment).
[Explanation of symbols]
Reference Signs List 20 vehicle seat 21 seat cushion 25 seat back 27 vehicle exterior part 36 shoulder belt support 38 outer belt (seat belt)
46: lap belt support 50: accommodation recess 77: movable member 81: telescopic cylinder (tubular body)

Claims (2)

While comprising a seat back and a seat cushion, a shoulder belt support for suspending a passenger restraint seat belt is provided on an upper side of one of the left and right sides of the seat back,
A lap belt support for fixing the tip of a suspended seat belt is attached to the seat cushion side below the side portion, and the seat belt is fixed to the surface of the side shoulder portion by these two support devices. A seat belt integrated vehicle seat that is stretched up and down along
A storage recess is provided in the seat back between the shoulder belt support and the lap belt support, and
A movable member having a contact surface with the seat belt;
A bellows-shaped cylinder with air stored inside is arranged,
The cylinder body is extended by supply of air to push the movable member outward from a standby position in the accommodation recess to float the seat belt from the side portion, and when the air is removed, the cylinder body itself is removed. A vehicle seat, wherein the movable member is returned to the standby position by elasticity. In the seat back or the seat cushion,
Air supply means for supplying air to the cylinder,
Detecting means for detecting a sitting state of the passenger;
The vehicle seat according to claim 1, further comprising a control unit that operates the air supply unit based on a detection signal from the detection unit.

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