vehicle

Abstract

To improve safety of an infant or child seated on a child seat attached to a rear seat.SOLUTION: A vehicle 10 includes: a front seat 16 which has a position adjustment part 20 for adjusting a position relative to a vehicle body 14 electrically; a rear seat 18 to which a child seat 34 can be attached; a child seat sensor which detects an attachment state of the child seat 34 to the rear seat 18; and a control ECU which limits position adjustment of the front seat 16 to the rear seat 18 side by the position adjustment part 20 when the child seat sensor detects the attachment state.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vehicle in which the position of the front seat can be adjusted and a child seat can be installed in the rear seat. [Background technology]

[0002] The vehicle seat device disclosed in the following Patent Document 1 determines the presence or absence of a rear seat occupant by a seating sensor installed in the rear seat and an infrared sensor installed and aimed at the rear seat to detect the temperature of an object seated in the rear seat, and restricts the adjustment of the front and rear position of the front seat if there is an occupant in the rear seat. This prevents the rear seat occupant from feeling uncomfortable or being injured when the front seat is moved significantly toward the rear of the vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-11884 A Summary of the Invention [Problem to be solved by the invention]

[0004] In some cases, child seats are installed in the rear seats of vehicles. Since infants and small children seated in child seats are small, there is a risk that the above-mentioned seating sensors and infrared sensors may not be able to detect them adequately. In particular, there are cases where it is not possible to warn front seat occupants when adjusting the position of the front seat for infants and small children, so there is room for improvement in terms of improving safety.

[0005] SUMMARY OF THE PRESENT EMBODIMENT In consideration of the above, an object of the present invention is to provide a vehicle that can improve the safety of infants and small children seated in child seats attached to the rear seat. [Means for solving the problem]

[0006] The vehicle of the present invention comprises a front seat having a position adjustment unit for electrically adjusting its position relative to the vehicle body, a rear seat in which a child seat can be attached, a detection unit for detecting the attachment state of the child seat to the rear seat, and a control unit for restricting adjustment of the position of the front seat toward the rear seat by the position adjustment unit when the detection unit detects the attachment state. Effect of the Invention

[0007] According to the present invention, the front seat has a position adjustment unit for electrically adjusting the position relative to the vehicle body, and the rear seat is capable of mounting a child seat. The detection unit detects the mounting state of the child seat in the rear seat. When the detection unit detects the mounting state, the control unit restricts the adjustment of the position of the front seat toward the rear seat by the position adjustment unit. This can increase the safety of babies and small children seated in the child seat mounted in the rear seat. [Brief description of the drawings]

[0008] [Figure 1] 1 is a side view showing a configuration of a vehicle interior of a vehicle according to an embodiment. [Diagram 2] FIG. 2 is a side view showing a front seat of the vehicle according to the embodiment. [Diagram 3] 1 is a block diagram showing an example of a hardware configuration of a rear seat occupant entrapment prevention system provided in a vehicle according to an embodiment. [Figure 4] 2 is a perspective view showing a child seat fixing portion and a connector portion of the child seat included in the vehicle configuration according to the embodiment. FIG. [Diagram 5] 5 is a cross-sectional view corresponding to a cut surface taken along line F5-F5 in FIG. 4. [Figure 6] 6 is a cross-sectional view corresponding to FIG. 5, showing a state in which a connector portion of the child seat is fixed to a chamber seat fixing portion. FIG. [Figure 7] FIG. 11 is a side view for explaining a range in which the position of the front seat can be adjusted. [Figure 8] FIG. 11 is a side view for explaining a limited range of position adjustment of the front seat. [Figure 9] 5 is a flowchart showing an example of a control process executed by a control ECU of the rear seat occupant entrapment prevention system. [Figure 10] 1 is a perspective view for explaining a case where the attachment state of a child seat is detected by a load sensor provided near a connection portion of the rear seat to the vehicle body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A vehicle 10 according to an embodiment of the present invention will be described below with reference to Figs. 1 to 9. In each drawing, some of the reference symbols may be omitted to make the drawing easier to see. The arrows FR, LH, and UP shown in each drawing indicate the forward direction (traveling direction), leftward direction, and upward direction of the vehicle, respectively. In the following description, when the directions of front / rear, left / right, and up / down are simply used, they indicate directions relative to the vehicle, unless otherwise specified.

[0010] As shown in Fig. 1, the vehicle 10 according to this embodiment is, for example, a sedan type, and includes a front seat 16 disposed at the front of the vehicle interior 12 and a rear seat 18 disposed at the rear of the vehicle interior 12. As shown in Figs. 1 and 2, the front seat 16 has a slide mechanism 22 for adjusting the position of the front seat 16 in the front-rear direction relative to the vehicle body 14 (see arrow S in Fig. 2), a lifter mechanism 24 for adjusting the position of the front seat 16 in the up-down direction relative to the vehicle body 14 (see arrow L in Fig. 2), and a reclining mechanism 26 for adjusting the reclining position of the seat back 16B relative to the seat cushion 16A (see arrow R in Fig. 2). The slide mechanism 22, the lifter mechanism 24, and the reclining mechanism 26 constitute a position adjustment unit 20 for electrically adjusting the position of the front seat 16 relative to the vehicle body 14.

[0011] 3, the slide motor 22A which is the drive source of the slide mechanism 22, the lifter motor 24A which is the drive source of the lifter mechanism 24, and the reclining motor 26A which is the drive source of the reclining mechanism 26 are each electrically connected to a control ECU 28 which is a control unit. The control ECU 28 is configured to include a CPU (Central Processing Unit) 28A, a ROM (Read Only Memory) 28B, a RAM (Random Access Memory) 28C, a storage 28D, and an input / output interface (I / F) 28E. The CPU 28A, the ROM 28B, the RAM 28C, the storage 28D, and the input / output interface 28E are connected to each other so as to be able to communicate with each other via a bus 28F.

[0012] The CPU 28A is a central processing unit, and executes various programs and controls each part. That is, the CPU 28A reads out the programs from the ROM 28B, and executes the programs using the RAM 28C as a working area. In this embodiment, the programs are stored in the ROM 28B. The input / output interface 28E is electrically connected to the slide motor 22A, the lifter motor 24A, the reclame motor 26A, the slide switch 22B, the lifter switch 24B, the reclame switch 26B, the slide sensor 22C, the lifter sensor 24C, the reclame sensor 26C, the child seat sensor 30 as a detection unit, and the vehicle power source 32. In FIG. 3, the child seat sensor is described as a "CRS sensor." The front seat 16, the rear seat 18, the control ECU 28, and the child seat sensor 30 constitute a rear seat occupant entrapment prevention system.

[0013] The slide switch 22B, the lifter switch 24B and the reclining switch 26B are provided, for example, on the front seat 16 and can be operated by an occupant P1 seated in the front seat 16. A CPU 28A of the control ECU 28 (hereinafter simply referred to as "control ECU 28") is configured to operate the slide motor 22A when the slide switch 22B is operated, to operate the lifter motor 24A when the lifter switch 24B is operated, and to operate the reclining motor 26A when the reclining switch 26B is operated.

[0014] The slide sensor 22C is provided in the slide mechanism 22 and detects the front-rear position of the front seat 16 relative to the vehicle body 14. The lifter sensor 24C is provided in the lifter mechanism 24 and detects the up-down position of the front seat 16 relative to the vehicle body 14. The reclining sensor 26C is provided in the reclining mechanism 26 and detects the reclining position of the seat back 16B relative to the seat cushion 16A. The control ECU 28 is capable of detecting the position of the front seat 16 relative to the vehicle body 14 based on outputs from the slide sensor 22C, the lifter sensor 24C and the reclining sensor 26C.

[0015] The child seat sensor 30 is provided in the rear seat 18 to which an ISOFIX type child seat 34 can be attached. As shown in Fig. 1 and Fig. 4, the rear seat 18 has a child seat fixing part 36 (see Fig. 1 and Fig. 4) to which the left and right connector parts 34B of the child seat 34 are fixed.

[0016] The child seat fixing part 36 is disposed at the rear end of the seat cushion 18A of the rear seat 18 and below the seat back 18B of the rear seat 18. The seat cushion 18A and the seat back 18B are directly fixed to the vehicle body 14, and the child seat fixing part 36 has a pair of left and right fixing metal fittings 40 fixed to a frame 38 of the seat cushion 18A. The left and right fixing metal fittings 40 are, for example, made by bending a metal wire, and are substantially U-shaped with an open rear side when viewed in the vertical direction. The rear ends of the left and right fixing metal fittings 40 are fixed to the frame 38.

[0017] The left and right connector parts 34B of the child seat 34 extend rearward from the lower end of the main body part 34A of the child seat 34. Grooves 35 into which the left and right fixing metal fittings 40 can be inserted are formed at the rear end (tip) of the left and right connector parts 34B. As shown in FIG. 6, when the left and right fixing metal fittings 40 are inserted into the respective grooves 35 of the left and right connector parts 34B, latches (not shown) provided on the left and right connector parts 34B are caught by the left and right fixing metal fittings 40, preventing the left and right fixing metal fittings 40 from slipping out of the respective grooves 35. This fixes the child seat 34 to the child seat fixing part 36.

[0018] The movable member 30B of the child seat sensor 30 is engaged with the left fixing metal fitting 40, which is one of the left and right fixing metal fittings 40. The movable member 30B is supported on the frame 38 so as to be slidable in the front-rear direction within a predetermined range, and is biased forward by a compression coil spring 30C, which is a biasing member. The movable member 30B has a groove 31 into which the left fixing metal fitting 40 is inserted. Two wires 30D and 30E are arranged in the movable member 30B. One wire 30D is electrically connected to the vehicle power supply 32 and the sensor main body 30A of the child seat sensor 30, and the other wire 30E is connected to the vehicle body 14 and grounded. The sensor main body 30A is electrically connected to the input / output interface 28E of the control ECU 28.

[0019] As shown in Fig. 4 and Fig. 5, when the left connector part 34B is not fixed to the left fixing metal fitting 40, the wirings 30D, 30E are electrically connected via the left fixing metal fitting 40, and a current flows through the wirings 30D, 30E. When this current is detected by the sensor main body 30A, the control ECU 28 determines that the child seat 34 is not attached to the rear seat 18, i.e., the child seat 34 is not attached to the rear seat 18. On the other hand, as shown in Fig. 6, when the left fixing metal fitting 40 is inserted into the groove 35 of the left connector part 34B, the moving member 30B is slid rearward by the left connector part 34B. This releases the connection between the wirings 30D, 30E via the left fixing metal fitting 40, and no current flows through the wirings 30D, 30E. In this manner, when the sensor main body 30A detects that no current is flowing through the wirings 30D, 30E, the control ECU 28 determines that the child seat 34 is attached to the rear seat 18, that is, the "attached state."

[0020] When the control ECU 28 determines that the seat is not attached, it is configured not to restrict the range in which the front-rear position of the front seat 16 can be adjusted by the slide mechanism 22, the range in which the front-rear position of the front seat 16 can be adjusted by the lifter mechanism 24, and the range in which the reclining position of the seat back 16B can be adjusted by the reclining mechanism 26. In this case, the range in which the front-rear position and the range in which the up-down position of the front seat 16 can be adjusted are the position adjustable range X1 indicated by the solid line in FIG.

[0021] On the other hand, when the control ECU 28 determines that the child seat 34 is installed, the control ECU 28 is configured to limit the range of the front and rear position adjustment of the front seat 16 by the slide mechanism 22, the range of the front and rear position adjustment of the front seat 16 by the lifter mechanism 24, and the range of the reclining position adjustment of the seat back 16B by the reclining mechanism 26. In this case, the front and rear position adjustment range and the up and down position adjustment range of the front seat 16 are the position adjustment range X2 shown by the solid line in FIG. 8, and the front and rear position adjustment limit range and the up and down position adjustment limit range of the front seat 16 are the position adjustment limit range Y shown by the dashed line in FIG. 8. In this position adjustment limit range Y, the position adjustment of the front seat 16 is limited. The position adjustment range X2 and the position adjustment limit range Y are set for each reclining position of the seat back 16B. In this way, in this embodiment, when the child seat sensor 30 detects the installation state of the child seat 34 to the rear seat 18, the position adjustment of the front seat 16 by the position adjustment unit 20 toward the rear seat 18 is limited.

[0022] An example of the control process performed by the control ECU 28 will be described below with reference to Fig. 9. In Fig. 9, the child seat is indicated as "CRS" and the switch is indicated as "SW". For example, when the ignition switch of the vehicle is turned on, the control ECU 28 starts the control process shown in Fig. 9. First, in step S1, the control ECU 28 determines whether the child seat 34 is attached to the rear seat 18. If this determination is affirmative, the process proceeds to step S2, and if this determination is negative, the process proceeds to step S3.

[0023] In step S2, the control ECU 28 changes the adjustable range of the position of the front seat 16, thereby restricting the position adjustment of the front seat 16. When the process in step S2 is completed, the process proceeds to the next step S3.

[0024] In step S3, the control ECU 28 judges whether any of the seat adjustment switches, the slide switch 22B, the lifter switch 24B, and the reclining switch 26B, is turned ON. If the judgment is affirmative, the control ECU 28 proceeds to the next step S4, and if the judgment is negative, the control ECU 28 returns to step S1 and repeats the above-mentioned process.

[0025] In step S4, the control ECU 28 activates the motor corresponding to the switch that has been turned ON among the slide motor 22A, the lifter motor 24A, and the recliner motor 26A. The front seat 16 is moved in response to the activation of the motor. When the process in step S4 is completed, the process proceeds to the next step S5.

[0026] In step S5, the control ECU 28 determines whether the position of the front seat 16 is within the position adjustable range. If the determination is affirmative, the control ECU 28 proceeds to the next step S6, and if the determination is negative, the control ECU 28 proceeds to step S7.

[0027] In step S6, the control ECU 28 judges whether any of the seat adjustment switches, the slide switch 22B, the lifter switch 24B, and the reclining switch 26B, has changed from ON to OFF. If the judgment is affirmative, the control ECU 28 proceeds to the next step S7, and if the judgment is negative, the control ECU 28 returns to step S4 and repeats the above-mentioned process.

[0028] In step S7, the control ECU 28 stops the motor corresponding to the switch that has been turned from ON to OFF among the slide motor 22A, the lifter motor 24A, and the recliner motor 26A, thereby stopping the movement of the front seat 16. When the process in step S7 is completed, the process proceeds to the next step S8.

[0029] In step S8, the control ECU 28 judges whether the ignition switch of the vehicle is turned off. If the judgment is affirmative, the control process by the control ECU 28 is terminated, and if the judgment is negative, the process returns to step S1 to repeat the above-mentioned process.

[0030] As described above, according to this embodiment, when the child seat sensor 30 detects that the child seat 34 is attached to the rear seat 18, the control ECU 28 restricts the position adjustment of the front seat 16 by the position adjustment unit 20 toward the rear seat 18. This makes it possible to prevent the rear seat 18 from interfering with an occupant P2, such as an infant or a child, seated in the child seat 34 (see the front seat 16 indicated by the two-dot chain line in FIG. 1). As a result, the safety of the occupant P2, such as an infant or a child, can be improved.

[0031] In the above embodiment, the child seat sensor 30 provided on the child seat fixing portion 36 of the rear seat 18 is the detection portion, but the present invention is not limited to this. The configuration of the detection portion can be changed as appropriate. For example, as shown in FIG. 10, when the rear seat 18' is connected to the vehicle body via a slide mechanism 18C, a load sensor provided near the connection portion of the rear seat 18' to the vehicle body (the area marked with the symbol LS in FIG. 10) may serve as the detection portion. In this case, the load of the child seat on the rear seat 18' is detected by the load sensor, thereby detecting the installation state of the child seat on the rear seat 18'.

[0032] In addition, the present invention can be implemented in various modifications without departing from the spirit and scope of the present invention. Furthermore, the scope of the present invention is not limited to the above-described embodiment. [Explanation of symbols]

[0033] 10 Vehicles 14 Body 16 Front seats 18 Rear seat 20 Position adjustment section 28 Control ECU (control unit) 30 Child seat sensor (detection unit) 34 Child seats

Claims

[Claim 1] a front seat having a position adjustment unit for electrically adjusting a position of the front seat relative to a vehicle body; A rear seat that can accommodate a child seat, A detection unit that detects the installation state of a child seat in the rear seat; a control unit that limits the position adjustment of the front seat toward the rear seat by the position adjustment unit when the detection unit detects the attached state; and A vehicle equipped with.

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