WO2023276474A1 - Buckle, determination system, and determination method - Google Patents

Buckle, determination system, and determination method Download PDF

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Publication number
WO2023276474A1
WO2023276474A1 PCT/JP2022/020551 JP2022020551W WO2023276474A1 WO 2023276474 A1 WO2023276474 A1 WO 2023276474A1 JP 2022020551 W JP2022020551 W JP 2022020551W WO 2023276474 A1 WO2023276474 A1 WO 2023276474A1
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WIPO (PCT)
Prior art keywords
seat
buckle
detected
sensor
tension
Prior art date
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PCT/JP2022/020551
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French (fr)
Japanese (ja)
Inventor
友紀 妹尾
秀之 冨部
博士 小川
Original Assignee
Ｊｏｙｓｏｎ Ｓａｆｅｔｙ Ｓｙｓｔｅｍｓ Ｊａｐａｎ合同会社
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Application filed by Ｊｏｙｓｏｎ Ｓａｆｅｔｙ Ｓｙｓｔｅｍｓ Ｊａｐａｎ合同会社 filed Critical Ｊｏｙｓｏｎ Ｓａｆｅｔｙ Ｓｙｓｔｅｍｓ Ｊａｐａｎ合同会社
Priority to CN202280046024.3A priority Critical patent/CN117615943A/en
Publication of WO2023276474A1 publication Critical patent/WO2023276474A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/26—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts with push-button fastenings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/90—Details or parts not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness

Definitions

  • the present disclosure relates to buckles, determination systems, and determination methods.
  • the present disclosure provides a buckle, determination system, and determination method that can accurately determine whether an object on the seat is an occupant or a child seat.
  • This disclosure is a main body connectable to a tongue attached to a seat belt of a vehicle; a buckle switch for detecting whether or not the tongue and the main body are connected; a sensor for detecting changes in tension of the seat belt; a detection unit that detects vital signs such as respiration or pulse based on changes in tension detected by the sensor; a determination unit that determines whether an object on the seat of the vehicle is an occupant or a child seat based on the detection state of the buckle switch and the detection state of the vital signs.
  • This disclosure also provides a buckle connectable to a tongue attached to a seat belt of a vehicle; a determination device that determines an object on the seat of the vehicle;
  • the buckle is a buckle switch for detecting whether or not the tongue and the buckle are connected; a sensor for detecting changes in tension of the seat belt; a detection unit that detects vital signs such as respiration or pulse based on changes in tension detected by the sensor;
  • the determination device provides a determination system for determining whether the object is an occupant or a child seat based on the detection state of the buckle switch and the detection state of the vital signs.
  • This disclosure also provides Detects the presence or absence of connection between the tongue attached to the seat belt of the vehicle and the buckle, detecting a change in tension of the seat belt; Detecting vital signs such as respiration or pulse based on the detected tension change, A determination method is provided for determining whether an object on the seat of the vehicle is an occupant or a child seat based on the detection state of the connection and the detection state of the vital sign.
  • the technology of the present disclosure it can be determined with high accuracy whether an object on the seat is an occupant or a child seat.
  • FIG. 4 shows a flow chart showing a first example of a determination method by a determination unit; It is a table
  • 9 is a flow chart showing a second example of a determination method by a determination unit; It is a table
  • 9 is a flow chart showing a third example of a determination method by a determination unit; FIG.
  • FIG. 11 is a table showing a fourth example of a determination method by a determination unit;
  • FIG. 11 is a flowchart showing a fourth example of a determination method by a determination unit;
  • FIG. It is an appearance front view of a buckle concerning this embodiment.
  • FIG. 2 is a cross-sectional view of the buckle according to the present embodiment, taken along the line AA. It is an exploded perspective view of a buckle concerning this embodiment. It is an exploded perspective view of some parts of the buckle concerning this embodiment.
  • FIG. 4 is a cross-sectional view for explaining a seat belt tension detection mechanism;
  • FIG. 4 is a cross-sectional view for explaining a seat belt tension detection mechanism;
  • FIG. 4 is a cross-sectional view for explaining a seat belt tension detection mechanism;
  • FIG. 4 is a cross-sectional view for explaining a seat belt tension detection mechanism;
  • It is a block diagram which shows an example of a structure of the buckle which concerns on 2nd Embodiment.
  • FIG. 1 is a diagram showing an example of the configuration of a seatbelt device.
  • the seatbelt device 1 is an example of an in-vehicle system mounted in a vehicle.
  • the seatbelt device 1 includes, for example, a seatbelt 4 , a retractor 3 , a shoulder anchor 6 , a tongue 7 and a buckle 8 .
  • the seat belt 4 is an example of a seat belt that restrains the occupant 11 sitting on the seat 2 of the vehicle, and is a belt-shaped member that is retractably wound around the retractor 3 .
  • a seat belt is also called webbing.
  • a belt anchor 5 at the tip of the seat belt 4 is fixed to the seat 2 or the vehicle body near the seat 2 .
  • the retractor 3 is an example of a retractor capable of retracting or retracting the seat belt 4, and the seat belt 4 is retracted from the retractor 3 when deceleration equal to or greater than a predetermined value is applied to the vehicle at the time of a vehicle collision or the like. limit
  • the retractor 3 is fixed to the seat 2 or the vehicle body near the seat 2 .
  • the shoulder anchor 6 is an example of a belt passer through which the seat belt 4 passes, and is a member that guides the seat belt 4 pulled out from the retractor 3 toward the shoulder of the occupant 11 .
  • the shoulder anchor 6 is fixed to the seat 2 or the vehicle body near the seat 2 .
  • the tongue 7 is an example of a belt passer through which the seat belt 4 passes, and is a component slidably attached to the seat belt 4 guided by the shoulder anchor 6 .
  • the buckle 8 is a part to which the tongue 7 is detachably connected, and is fixed to the seat 2 or the vehicle body near the seat 2, for example.
  • the buckle 8 has a body portion 8a and a stay 8b.
  • the body portion 8a is a portion to which the tongue 7 is detachably connected.
  • the stay 8b is an example of a support member that supports the main body portion 8a of the buckle 8. As shown in FIG. The stay 8 b is fixed to the seat 2 or the vehicle body near the seat 2 .
  • a portion of the seat belt 4 between the shoulder anchor 6 and the tongue 7 while the tongue 7 is connected to the buckle 8 is the shoulder belt portion 9 that restrains the chest and shoulders of the occupant 11 .
  • a portion of the seat belt 4 between the belt anchor 5 and the tongue 7 in a state where the tongue 7 is connected to the buckle 8 is a lap belt portion 10 that restrains the waist of the occupant 11 .
  • FIG. 2 is a block diagram showing an example of the configuration of the buckle according to the first embodiment.
  • the buckle 8 shown in FIG. 2 includes a buckle switch 13, a sensor 20, a detection section 30, a determination section 70 and an output section 80. As shown in FIG.
  • the buckle switch 13 is an example of connection detection means for detecting connection between the tongue 7 and the main body portion 8a of the buckle 8.
  • the buckle switch 13 detects whether or not the seat belt 4 is worn by detecting whether or not the tongue 7 and the body portion 8a are connected.
  • the buckle switch 13 detects a state in which the tongue 7 and the body portion 8a are not connected as a state in which the seat belt 4 is not worn (seat belt 4 non-wearing state).
  • the buckle switch 13 detects the state in which the tongue 7 and the main body portion 8a are connected as the state in which the seat belt 4 is worn (the state in which the seat belt 4 is worn).
  • the sensor 20 detects the tension generated in the seat belt 4 (hereinafter also referred to as "tension F”) and outputs an output signal that changes according to the detected tension F.
  • tension F the tension generated in the seat belt 4
  • the tension F of the seat belt 4 changes because the movement of the occupant's 11 chest and abdomen caused by body movement and breathing of the occupant 11 is transmitted to the seat belt 4.
  • - ⁇ A change in the tension F of the seat belt 4 is transmitted to the tongue 7 and transmitted to the buckle 8 via the tongue 7 .
  • the sensor 20 may be provided on the main body portion 8 a of the buckle 8 or may be provided on the stay 8 b of the buckle 8 .
  • the sensor 20 detects deformation or displacement caused by a change in the tension F of the seat belt 4 as the tension F of the seat belt 4, for example.
  • the sensor 20 may be a strain sensor that detects changes in the load input to the buckle 8 from the seat belt 4 via the tongue 7, or it detects changes in capacitance caused by changes in the tension F of the seat belt 4. It may be a capacitive sensor that Further, when the tension F of the seat belt 4 changes, the buckle 8 itself connected to the seat belt 4 via the tongue 7 is displaced. Therefore, the sensor 20 may be a device that detects the displacement of the buckle 8 itself as a change in the tension F of the seat belt 4 . For example, there is a non-contact sensor that detects the relative distance to a reflecting object by transmitting and receiving light or radio waves.
  • the detection unit 30 detects vital signs such as respiration or pulse based on changes in tension detected by the sensor 20 .
  • the detection unit 30 detects the periodicity of signal components representing changes in tension F from the output signal of the sensor 20, thereby detecting vital signs such as respiration or pulse. This is because, if there is periodicity, it is estimated that the periodic movement of breathing or pulse of the occupant 11 wearing the seatbelt 4 is detected by the sensor 20 as a change in tension.
  • the detection unit 30 detects vital signs by extracting frequency components corresponding to vital signs from signal components representing changes in the tension F detected by the sensor 20 using a predetermined filter.
  • the respiratory signal has a period of about 3 to 6 seconds
  • the pulse signal has a period of about 0.5 to 1 second.
  • the detection unit 30 may detect the magnitude of the signal component representing the change in the tension F from the output signal of the sensor 20 .
  • the detection unit 30 detects the magnitude of the tension F by detecting the magnitude of the signal component representing the change in the tension F. This is because the magnitude of the signal component corresponds to the magnitude of the tension F.
  • the determination unit 70 determines whether the object on the seat 2 of the vehicle is an occupant or a child seat based on the detection state of the buckle switch 13 and the detection state of the vital signs by the detection unit 30 . A detailed determination method will be described later.
  • a child seat is also called a CRS (Child Restraint System) and is one of child restraint systems. Child seats are not limited to those for infants, and may be for school children.
  • the detection unit 30 and the determination unit 70 are, for example, integrated circuits including one or more computers (specifically, microcomputers).
  • the detection unit 30 and the determination unit 70 may be implemented by different integrated circuits, or may be integrated into one integrated circuit.
  • a computer has a processor such as a CPU (Central Processing Unit) and a memory.
  • Each function of the detection unit 30 and the determination unit 70 is realized by the processor operating according to the program stored in the memory.
  • Each function of the detection unit 30 and the determination unit 70 may be implemented by an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit).
  • the output unit 80 outputs the result of determination by the determination unit 70 (determination result as to whether it is an occupant or a child seat) to an external device of the buckle 8 by wire or wirelessly.
  • the external device executes predetermined control based on the determination result. For example, if the object on the seat 2 is determined to be an occupant, the external device determines that the airbag needs to be deployed, and if the object on the seat 2 is determined to be a child seat, the external device determines that the airbag is deployed. It is determined that deployment is unnecessary.
  • the output unit 80 outputs, for example, the determination result of the determination unit 70 to the outside of the buckle 8 in the form of a signal, light, sound, vibration, or any combination thereof.
  • FIG. 3 is a table showing a first example of the determination method by the determination unit.
  • FIG. 4 is a flow chart showing a first example of the determination method by the determination unit. "Empty" represents a state in which there is no object on the seat 2, and "CRS" represents a child seat.
  • step S11 the determination unit 70 determines whether or not the connection between the tongue 7 and the main body 8a is detected by the buckle switch 13. If the connection is not detected by the buckle switch 13, the determination unit 70 determines that the buckle 8 is unused (step S15). On the other hand, when the connection is detected by the buckle switch 13, the determination unit 70 determines whether or not the vital signs are detected by the detection unit 30 (step S12).
  • the determination unit 70 determines that the object on the seat 2 is an occupant when the vital signs are detected by the detection unit 30 (step S13). On the other hand, when the vital signs are not detected by the detection unit 30, the determination unit 70 determines that the object on the seat 2 is a child seat (step S14).
  • the determination unit 70 determines whether the connection between the tongue 7 and the main body 8a is detected by the buckle switch 13 and the vital signs are detected by the detection unit 30. , the object is determined to be an occupant. On the other hand, when the connection between the tongue 7 and the body portion 8a is detected by the buckle switch 13 and the vital signs are not detected by the detection section 30, the determination section 70 determines that the object is a child seat. Thus, by using the vital signs to determine whether the object on the seat 2 is an occupant or a child seat, it can be determined with high accuracy whether the object on the seat 2 is an occupant or a child seat.
  • FIG. 5 is a table showing a second example of the determination method by the determination unit.
  • FIG. 6 is a flow chart showing a second example of the determination method by the determination unit. In the second example, descriptions of the same parts as in the first example are omitted.
  • the determination unit 70 determines whether vital signs are detected by the detection unit 30 (step S12). When the vital sign is not detected by the detection unit 30, the determination unit 70 determines whether or not the magnitude of the seat belt tension F detected by the detection unit 30 using the sensor 20 is equal to or greater than a predetermined threshold value (step S16).
  • step S16 the determination unit 70 determines that the object on the seat 2 is a child seat when the magnitude of the tension F is equal to or greater than a predetermined threshold (step S14). This is because the tension F is relatively large when the child seat is correctly fixed to the seat 2 by the seat belt 4 connected to the buckle 8 . On the other hand, when the magnitude of the tension F is less than the predetermined threshold value, the determination unit 70 determines that the seat belt is in an improper use state (step S17). This is because if the child seat is not properly secured to the seat 2 by the seat belt 4 connected to the buckle 8, the tension F will be relatively small.
  • the improper use states in step S17 include, for example, a state in which the child seat is not properly fixed, a state in which an object other than the child seat is fixed to the seat 2, a state in which the dummy tongue 7 is connected to the buckle 8, There is a state where the seat belt 4 is clipped and the seat belt 4 is loose.
  • the output unit 80 may output an alarm when the determination unit 70 determines in step S17 that the seat belt is in an improper use state. As a result, it is possible to make the occupant aware of the improper use state and to encourage the occupant to eliminate the improper use state.
  • FIG. 7 is a table showing a third example of the determination method by the determination unit.
  • FIG. 8 is a flow chart showing a third example of the determination method by the determination unit. In the third example, descriptions of the same parts as in the first and second examples will be omitted.
  • step S ⁇ b>18 the determination unit 70 determines whether or not the presence of an object on the seat 2 has been detected by the seat sensor 90 provided on the seat 2 .
  • a seat sensor 90 detects the presence of an object on the seat 2 and outputs the detection result.
  • the seat sensor 90 is provided on, for example, a cushion (seat portion) of the seat 2 or a seat rail.
  • a result of detection by the seat sensor 90 is input to the determination section 70 in the buckle 8 via a wired or wireless connection.
  • the sheet sensor 90 outputs an output signal that changes according to the presence or absence of an object on the sheet 2 .
  • the seat sensor 90 is, for example, a load sensor that detects the load applied to the seat 2 by distortion or capacitance. If there is no object on the sheet 2 or if the object on the sheet 2 is a relatively light article, the load applied to the sheet 2 will be less than the predetermined load value, so the absence of the object is detected. When an occupant or a child seat is present on the seat 2, the load applied to the seat 2 is greater than or equal to the predetermined load value, so the existence of the object is detected.
  • step S18 of FIG. 8 if the presence of an object is not detected by the seat sensor 90, the determination unit 70 determines that the seat 2 is vacant (step S19). On the other hand, when the presence of an object is detected by the seat sensor 90, the determination unit 70 determines whether the object on the seat 2 is an occupant or a child seat (steps S11 to S15). By using the detection result of the seat sensor 90, it is possible to determine whether or not the seat is vacant.
  • FIG. 9 is a table showing a fourth example of the determination method by the determination unit.
  • FIG. 10 is a flow chart showing a fourth example of the determination method by the determination unit.
  • a fourth example is a method in which steps S18 and S19 of the third example (FIGS. 7 and 8) are added to the second example (FIGS. 5 and 6). According to the fourth example, the effects of both the second example and the third example are obtained.
  • the scale of each part in the drawings may differ from the actual scale. In directions such as parallel, right angle, orthogonal, horizontal, vertical, up and down, left and right, misalignment to the extent that the effects of the embodiment are not impaired is allowed.
  • the shape of the corners is not limited to right angles, and may be arcuately rounded.
  • the X-axis direction, Y-axis direction, and Z-axis direction represent directions parallel to the X-axis, directions parallel to the Y-axis, and directions parallel to the Z-axis, respectively.
  • the X-axis direction, the Y-axis direction, and the Z-axis direction are orthogonal to each other.
  • the XY plane, YZ plane, and ZX plane are virtual planes parallel to the X-axis direction and Y-axis direction, virtual planes parallel to the Y-axis direction and Z-axis direction, and virtual planes parallel to the Z-axis direction and X-axis direction, respectively.
  • FIG. 11 is an external front view of the buckle according to the first embodiment.
  • FIG. 12 is a cross-sectional view of the buckle according to the present embodiment, taken along the line AA.
  • the X-axis direction represents the width direction of the buckle 8 .
  • the Y-axis direction represents the height direction of the buckle 8 when mounted on the vehicle.
  • the Z-axis direction represents the thickness direction of the buckle 8 .
  • FIG. 13 is an exploded perspective view of the buckle according to this embodiment.
  • FIG. 14 is an exploded perspective view of some parts of the buckle according to this embodiment.
  • the buckle 8 (body portion 8a) includes a buckle body 8c, a circuit board 16, an upper cover 12, a lower cover 14, a lever 40 and a leaf spring 50.
  • FIGS. 13 and 14 the buckle 8 (body portion 8a) includes a buckle body 8c, a circuit board 16, an upper cover 12, a lower cover 14, a lever 40 and a leaf spring 50.
  • the buckle body 8c is a subassembly that can be connected to the tongue attached to the seat belt.
  • the buckle main body 8c has, for example, a button 31 that receives a push operation for releasing the connection between the tongue and the buckle from the occupant's fingers, and a buckle base 37 that holds the components of the buckle main body 8c such as the button 31.
  • the buckle main body 8c is formed with an insertion opening 15 into which the metal plate of the tongue is inserted.
  • the upper cover 12 is a resin part that covers the buckle body 8c so that the button 31 is exposed.
  • the upper cover 12 and the lower cover 14 sandwich and hold the buckle main body 8c.
  • a lever 40 is attached to the upper cover 12 in this embodiment.
  • the lever 40 has a pivot 41 projecting in the X-axis direction and is rotatably supported by the upper cover 12 around the pivot 41 .
  • the circuit board 16 in this embodiment has the configuration shown in FIG.
  • the lower cover 14 is an example of a buckle cover having an inner surface to which the circuit board 16 is fixed.
  • the lower cover 14 is a resin component that covers the circuit board 16 .
  • the upper cover 12 and the lower cover 14 are outer covers of the buckle 8, and are housings that house the buckle main body 8c, the circuit board 16, the lever 40 and the leaf spring 50.
  • the outer cover of the buckle 8 is composed of two parts, the upper cover 12 and the lower cover 14, in order to accommodate these parts, but it may be composed of three or more parts.
  • the upper cover 12 faces the side opposite to the occupant wearing the seat belt connected to the buckle 8 via the tongue, and the lower cover 14 faces the occupant. .
  • FIG. 15 is cross-sectional views for explaining a seat belt tension detection mechanism.
  • the tip of the tongue 7 contacts the ejector 33 .
  • the ejector 33 pushed by contact with the tip of the tongue 7 moves in the direction in which the tongue 7 is inserted, the latch 34 rotates, and the slider 32 descends. Rotation of the latch 34 causes the latch 34 to engage the tongue 7 and the slider 32 to enter under the lock pin 35 (see FIG. 16).
  • the insertion slot 15 is a gap between the button 31 and the lever 40.
  • the opening height e (see FIG. 15) of the insertion port 15 is determined by the height of the gap.
  • the lever 40 and leaf spring 50 are formed so that the opening height e of the insertion port 15 in the initial position state of the lever 40 is slightly narrower than the plate thickness d of the tongue 7 . Therefore, in FIG. 16, when the tongue 7 is inserted into the insertion opening 15, the lever 40 is pushed by the tongue 7 at the point of action P2 to slightly rotate clockwise about the pivot 41. As shown in FIG. Leaf spring 50 is pushed in by slightly rotating lever 40 . The elastic force of the leaf spring 50 pushed by the lever 40 suppresses rattling of the tongue 7 between the button 31 and the lever 40 . As a result, minute changes in the tension F of the seat belt are accurately transmitted to the sensor 20 via the tongue 7 , the lever 40 and the leaf spring 50 . As a result, the sensor 20 can detect minute changes in the tension F with high accuracy.
  • FIG. 18 is a block diagram showing an example of the configuration of the buckle according to the second embodiment.
  • descriptions of the same configurations, actions, and effects as in the first embodiment are omitted or simplified by citing the above descriptions.
  • a determination system 100 shown in FIG. 18 includes a buckle 8 , a determination section 70 and an output section 80 , and may further include a seat sensor 90 .
  • the buckle 8 includes the buckle switch 13, the sensor 20 and the detection section 30.
  • the determination unit 70 and the output unit 80 are implemented by, for example, a determination device such as an electronic control unit (so-called ECU) mounted on the vehicle. According to the second embodiment, whether an object on the seat 2 of the vehicle is an occupant or a child seat can be determined with high accuracy by the determination device (determination section 70) outside the buckle 8.
  • ECU electronice control unit
  • the seat 2 may be the front seat or the rear seat of the vehicle.
  • the detection unit 30 may be provided in another device arranged at a location different from the buckle 8 , and the another device may be the same device as or different from the determination unit 70 .

Abstract

A buckle comprising: a body which can be linked to a tongue attached to a seat belt of a vehicle; a buckle switch which detects whether or not the tongue and the body are linked to each other; a sensor which detects changes in tension in the seat belt; a detection unit which detects a vital sign, which is respiration or pulse, on the basis of the changes in tension detected by the sensor; and a determination unit which determines, on the basis of a detection state of the buckle switch and a detection state of the vital sign, whether an object on a seat of the vehicle is an occupant or a child seat.

Description

バックル、判定システム及び判定方法Buckle, judging system and judging method
　本開示は、バックル、判定システム及び判定方法に関する。 The present disclosure relates to buckles, determination systems, and determination methods.
　従来、シートベルトに設けられたタングプレートがバックルに挿入され、且つ、シートベルトが所定張力以上で締め込まれた状態を検出した場合、チャイルドシートがシートに装着されていると判定する技術が知られている（例えば、特許文献１参照）。 Conventionally, there is known a technique for determining that a child seat is attached to a seat when a tongue plate provided on the seat belt is inserted into a buckle and the seat belt is tightened with a predetermined tension or more. (See, for example, Patent Document 1).
特開２００３－９５０６０号公報JP-A-2003-95060
　しかしながら、チャイルドシートが所定張力以上で取り付けられなかった場合、チャイルドシートの判定を誤るおそれがある。 However, if the child seat cannot be attached with a predetermined tension or more, there is a risk of misjudgment of the child seat.
　本開示は、シート上の物体が乗員かチャイルドシートかを高精度に判定できる、バックル、判定システム及び判定方法を提供する。 The present disclosure provides a buckle, determination system, and determination method that can accurately determine whether an object on the seat is an occupant or a child seat.
　本開示は、
　車両のシートベルトに取り付けられたタングと連結可能な本体部と、
　前記タングと前記本体部との連結の有無を検知するバックルスイッチと、
　前記シートベルトの張力変化を検知するセンサと、
　前記センサにより検知された張力変化に基づいて、呼吸又は脈拍であるバイタルサインを検知する検知部と、
　前記バックルスイッチの検知状態と前記バイタルサインの検知状態に基づいて、前記車両のシート上の物体が乗員かチャイルドシートかを判定する判定部と、を備える、バックルを提供する。 This disclosure is
a main body connectable to a tongue attached to a seat belt of a vehicle;
a buckle switch for detecting whether or not the tongue and the main body are connected;
a sensor for detecting changes in tension of the seat belt;
a detection unit that detects vital signs such as respiration or pulse based on changes in tension detected by the sensor;
a determination unit that determines whether an object on the seat of the vehicle is an occupant or a child seat based on the detection state of the buckle switch and the detection state of the vital signs.
　また、本開示は、
　車両のシートベルトに取り付けられたタングと連結可能なバックルと、
　前記車両のシート上の物体を判定する判定装置と、を備え、
　前記バックルは、
　前記タングと前記バックルとの連結の有無を検知するバックルスイッチと、
　前記シートベルトの張力変化を検知するセンサと、
　前記センサにより検知された張力変化に基づいて、呼吸又は脈拍であるバイタルサインを検知する検知部と、を有し、
　前記判定装置は、前記バックルスイッチの検知状態と前記バイタルサインの検知状態に基づいて、前記物体が乗員かチャイルドシートかを判定する、判定システムを提供する。 This disclosure also provides
a buckle connectable to a tongue attached to a seat belt of a vehicle;
a determination device that determines an object on the seat of the vehicle;
The buckle is
a buckle switch for detecting whether or not the tongue and the buckle are connected;
a sensor for detecting changes in tension of the seat belt;
a detection unit that detects vital signs such as respiration or pulse based on changes in tension detected by the sensor;
The determination device provides a determination system for determining whether the object is an occupant or a child seat based on the detection state of the buckle switch and the detection state of the vital signs.
　また、本開示は、
　車両のシートベルトに取り付けられたタングと、バックルとの連結の有無を検知し、
　前記シートベルトの張力変化を検知し、
　検知された張力変化に基づいて、呼吸又は脈拍であるバイタルサインを検知し、
　前記連結の検知状態と前記バイタルサインの検知状態に基づいて、前記車両のシート上の物体が乗員かチャイルドシートかを判定する、判定方法を提供する。 This disclosure also provides
Detects the presence or absence of connection between the tongue attached to the seat belt of the vehicle and the buckle,
detecting a change in tension of the seat belt;
Detecting vital signs such as respiration or pulse based on the detected tension change,
A determination method is provided for determining whether an object on the seat of the vehicle is an occupant or a child seat based on the detection state of the connection and the detection state of the vital sign.
　本開示の技術によれば、シート上の物体が乗員かチャイルドシートかを高精度に判定できる。 According to the technology of the present disclosure, it can be determined with high accuracy whether an object on the seat is an occupant or a child seat.
シートベルト装置の構成の一例を示す図である。It is a figure which shows an example of a structure of a seatbelt apparatus. 第１実施形態に係るバックルの構成の一例を示すブロック図である。It is a block diagram showing an example of the structure of the buckle concerning a 1st embodiment. 判定部による判定方法の第１例を示す表である。It is a table|surface which shows the 1st example of the determination method by a determination part. 判定部による判定方法の第１例を示すフローチャートである。4 is a flow chart showing a first example of a determination method by a determination unit; 判定部による判定方法の第２例を示す表である。It is a table|surface which shows the 2nd example of the determination method by a determination part. 判定部による判定方法の第２例を示すフローチャートである。9 is a flow chart showing a second example of a determination method by a determination unit; 判定部による判定方法の第３例を示す表である。It is a table|surface which shows the 3rd example of the determination method by a determination part. 判定部による判定方法の第３例を示すフローチャートである。9 is a flow chart showing a third example of a determination method by a determination unit; 判定部による判定方法の第４例を示す表である。FIG. 11 is a table showing a fourth example of a determination method by a determination unit; FIG. 判定部による判定方法の第４例を示すフローチャートである。FIG. 11 is a flowchart showing a fourth example of a determination method by a determination unit; FIG. 本実施形態に係るバックルの外観正面図である。It is an appearance front view of a buckle concerning this embodiment. 本実施形態に係るバックルの断面Ａ－Ａにおける断面図である。FIG. 2 is a cross-sectional view of the buckle according to the present embodiment, taken along the line AA. 本実施形態に係るバックルの分解斜視図である。It is an exploded perspective view of a buckle concerning this embodiment. 本実施形態に係るバックルの一部の部品の分解斜視図である。It is an exploded perspective view of some parts of the buckle concerning this embodiment. シートベルトの張力の検知機構を説明するための断面図である。FIG. 4 is a cross-sectional view for explaining a seat belt tension detection mechanism; シートベルトの張力の検知機構を説明するための断面図である。FIG. 4 is a cross-sectional view for explaining a seat belt tension detection mechanism; シートベルトの張力の検知機構を説明するための断面図である。FIG. 4 is a cross-sectional view for explaining a seat belt tension detection mechanism; 第２実施形態に係るバックルの構成の一例を示すブロック図である。It is a block diagram which shows an example of a structure of the buckle which concerns on 2nd Embodiment.
　以下、実施形態を説明する。 The embodiment will be described below.
　図１は、シートベルト装置の構成の一例を示す図である。シートベルト装置１は、車両に搭載された車載システムの一例である。シートベルト装置１は、例えば、シートベルト４と、リトラクタ３と、ショルダーアンカー６と、タング７と、バックル８とを備える。 FIG. 1 is a diagram showing an example of the configuration of a seatbelt device. The seatbelt device 1 is an example of an in-vehicle system mounted in a vehicle. The seatbelt device 1 includes, for example, a seatbelt 4 , a retractor 3 , a shoulder anchor 6 , a tongue 7 and a buckle 8 .
　シートベルト４は、車両のシート２に座る乗員１１を拘束するシートベルトの一例であり、リトラクタ３に引き出し可能に巻き取られる帯状部材である。シートベルトは、ウェビングとも称される。シートベルト４の先端のベルトアンカー５は、シート２又はシート２の近傍の車体に固定される。 The seat belt 4 is an example of a seat belt that restrains the occupant 11 sitting on the seat 2 of the vehicle, and is a belt-shaped member that is retractably wound around the retractor 3 . A seat belt is also called webbing. A belt anchor 5 at the tip of the seat belt 4 is fixed to the seat 2 or the vehicle body near the seat 2 .
　リトラクタ３は、シートベルト４の巻き取り又は引き出しを可能にする巻き取り装置の一例であり、車両衝突時等の所定値以上の減速度が車両に加わると、シートベルト４がリトラクタ３から引き出されることを制限する。リトラクタ３は、シート２又はシート２の近傍の車体に固定される。 The retractor 3 is an example of a retractor capable of retracting or retracting the seat belt 4, and the seat belt 4 is retracted from the retractor 3 when deceleration equal to or greater than a predetermined value is applied to the vehicle at the time of a vehicle collision or the like. limit The retractor 3 is fixed to the seat 2 or the vehicle body near the seat 2 .
　ショルダーアンカー６は、シートベルト４が挿通するベルト挿通具の一例であり、リトラクタ３から引き出されたシートベルト４を乗員１１の肩部の方へガイドする部材である。ショルダーアンカー６は、シート２又はシート２の近傍の車体に固定される。 The shoulder anchor 6 is an example of a belt passer through which the seat belt 4 passes, and is a member that guides the seat belt 4 pulled out from the retractor 3 toward the shoulder of the occupant 11 . The shoulder anchor 6 is fixed to the seat 2 or the vehicle body near the seat 2 .
　タング７は、シートベルト４が挿通するベルト挿通具の一例であり、ショルダーアンカー６によりガイドされたシートベルト４にスライド可能に取り付けられた部品である。 The tongue 7 is an example of a belt passer through which the seat belt 4 passes, and is a component slidably attached to the seat belt 4 guided by the shoulder anchor 6 .
　バックル８は、タング７が着脱可能に連結される部品であり、例えば、シート２又はシート２の近傍の車体に固定される。 The buckle 8 is a part to which the tongue 7 is detachably connected, and is fixed to the seat 2 or the vehicle body near the seat 2, for example.
　バックル８は、本体部８ａと、ステー８ｂとを有する。本体部８ａは、タング７が着脱可能に連結される部位である。ステー８ｂは、バックル８の本体部８ａを支持する支持部材の一例である。ステー８ｂは、シート２又はシート２の近傍の車体に固定される。 The buckle 8 has a body portion 8a and a stay 8b. The body portion 8a is a portion to which the tongue 7 is detachably connected. The stay 8b is an example of a support member that supports the main body portion 8a of the buckle 8. As shown in FIG. The stay 8 b is fixed to the seat 2 or the vehicle body near the seat 2 .
　タング７がバックル８に連結された状態で、シートベルト４のうちショルダーアンカー６とタング７との間の部分が、乗員１１の胸部及び肩部を拘束するショルダーベルト部９である。タング７がバックル８に連結された状態で、シートベルト４のうちベルトアンカー５とタング７との間の部分が、乗員１１の腰部を拘束するラップベルト部１０である。 A portion of the seat belt 4 between the shoulder anchor 6 and the tongue 7 while the tongue 7 is connected to the buckle 8 is the shoulder belt portion 9 that restrains the chest and shoulders of the occupant 11 . A portion of the seat belt 4 between the belt anchor 5 and the tongue 7 in a state where the tongue 7 is connected to the buckle 8 is a lap belt portion 10 that restrains the waist of the occupant 11 .
　図２は、第１実施形態に係るバックルの構成の一例を示すブロック図である。第１実施形態では、図２に示すバックル８は、バックルスイッチ１３、センサ２０、検知部３０、判定部７０及び出力部８０を備える。 FIG. 2 is a block diagram showing an example of the configuration of the buckle according to the first embodiment. In the first embodiment, the buckle 8 shown in FIG. 2 includes a buckle switch 13, a sensor 20, a detection section 30, a determination section 70 and an output section 80. As shown in FIG.
　バックルスイッチ１３は、タング７とバックル８の本体部８ａとの連結を検知する連結検知手段の一例である。バックルスイッチ１３は、タング７と本体部８ａとの連結の有無を検知することによって、シートベルト４の装着の有無を検知する。バックルスイッチ１３は、タング７と本体部８ａとが連結されていない状態を、シートベルト４が装着されていない状態（シートベルト４の非装着状態）として検知する。一方、バックルスイッチ１３は、タング７と本体部８ａとが連結されている状態を、シートベルト４が装着されている状態（シートベルト４の装着状態）として検知する。 The buckle switch 13 is an example of connection detection means for detecting connection between the tongue 7 and the main body portion 8a of the buckle 8. The buckle switch 13 detects whether or not the seat belt 4 is worn by detecting whether or not the tongue 7 and the body portion 8a are connected. The buckle switch 13 detects a state in which the tongue 7 and the body portion 8a are not connected as a state in which the seat belt 4 is not worn (seat belt 4 non-wearing state). On the other hand, the buckle switch 13 detects the state in which the tongue 7 and the main body portion 8a are connected as the state in which the seat belt 4 is worn (the state in which the seat belt 4 is worn).
　センサ２０は、シートベルト４に生ずる張力（以下、「張力Ｆ」とも称する）を検出し、検出された張力Ｆに応じて変化する出力信号を出力する。シートベルト４が乗員１１に装着されていると、乗員１１の体動や呼吸によって生ずる乗員１１の胸や腹の動きがシートベルト４に伝わるため、シートベルト４の張力Ｆが変化する。シートベルト４の張力Ｆの変化は、タング７に伝達し、タング７を介してバックル８に伝達する。センサ２０は、バックル８の本体部８ａに設けられてもよいし、バックル８のステー８ｂに設けられてもよい。 The sensor 20 detects the tension generated in the seat belt 4 (hereinafter also referred to as "tension F") and outputs an output signal that changes according to the detected tension F. When the seat belt 4 is attached to the occupant 11, the tension F of the seat belt 4 changes because the movement of the occupant's 11 chest and abdomen caused by body movement and breathing of the occupant 11 is transmitted to the seat belt 4. - 特許庁A change in the tension F of the seat belt 4 is transmitted to the tongue 7 and transmitted to the buckle 8 via the tongue 7 . The sensor 20 may be provided on the main body portion 8 a of the buckle 8 or may be provided on the stay 8 b of the buckle 8 .
　センサ２０は、例えば、シートベルト４の張力Ｆの変化によって生ずる変形又は変位を、シートベルト４の張力Ｆとして検出する。例えば、センサ２０は、シートベルト４からタング７を介してバックル８に入力される荷重の変化を検出するひずみセンサでもよいし、シートベルト４の張力Ｆの変化によって生ずる静電容量の変化を検出する静電容量センサでもよい。また、シートベルト４の張力Ｆが変化すると、シートベルト４にタング７を介して接続されるバックル８自体が変位する。そのため、センサ２０は、バックル８自体の変位をシートベルト４の張力Ｆの変化として検出するデバイスでもよい。例えば、光又は電波の送受によって反射対象物との相対距離を検出する非接触センサなどが挙げられる。 The sensor 20 detects deformation or displacement caused by a change in the tension F of the seat belt 4 as the tension F of the seat belt 4, for example. For example, the sensor 20 may be a strain sensor that detects changes in the load input to the buckle 8 from the seat belt 4 via the tongue 7, or it detects changes in capacitance caused by changes in the tension F of the seat belt 4. It may be a capacitive sensor that Further, when the tension F of the seat belt 4 changes, the buckle 8 itself connected to the seat belt 4 via the tongue 7 is displaced. Therefore, the sensor 20 may be a device that detects the displacement of the buckle 8 itself as a change in the tension F of the seat belt 4 . For example, there is a non-contact sensor that detects the relative distance to a reflecting object by transmitting and receiving light or radio waves.
　検知部３０は、センサ２０により検知された張力変化に基づいて、呼吸又は脈拍であるバイタルサインを検知する。例えば、検知部３０は、センサ２０の出力信号から、張力Ｆの変化を表す信号成分の周期性を検出することで、呼吸又は脈拍であるバイタルサインを検知する。周期性がある場合、シートベルト４を着用する乗員１１の呼吸又は脈拍の周期的動作が、張力変化として、センサ２０により検出されていると推定されるからである。検知部３０は、センサ２０により検知された張力Ｆの変化を表す信号成分から、バイタルサインに相当する周波数成分を所定のフィルタにより抽出することで、バイタルサインを検知する。呼吸信号は、３秒から６秒程度の周期を有し、脈拍信号は、０．５秒～１秒程度の周期を有する。 The detection unit 30 detects vital signs such as respiration or pulse based on changes in tension detected by the sensor 20 . For example, the detection unit 30 detects the periodicity of signal components representing changes in tension F from the output signal of the sensor 20, thereby detecting vital signs such as respiration or pulse. This is because, if there is periodicity, it is estimated that the periodic movement of breathing or pulse of the occupant 11 wearing the seatbelt 4 is detected by the sensor 20 as a change in tension. The detection unit 30 detects vital signs by extracting frequency components corresponding to vital signs from signal components representing changes in the tension F detected by the sensor 20 using a predetermined filter. The respiratory signal has a period of about 3 to 6 seconds, and the pulse signal has a period of about 0.5 to 1 second.
　検知部３０は、センサ２０の出力信号から、張力Ｆの変化を表す信号成分の大きさを検出してもよい。検知部３０は、張力Ｆの変化を表す信号成分の大きさを検出することで、張力Ｆの大きさを検知する。当該信号成分の大きさは、張力Ｆの大きさに対応するからである。 The detection unit 30 may detect the magnitude of the signal component representing the change in the tension F from the output signal of the sensor 20 . The detection unit 30 detects the magnitude of the tension F by detecting the magnitude of the signal component representing the change in the tension F. This is because the magnitude of the signal component corresponds to the magnitude of the tension F.
　判定部７０は、バックルスイッチ１３の検知状態と検知部３０によるバイタルサインの検知状態に基づいて、車両のシート２上の物体が乗員かチャイルドシートかを判定する。詳細な判定方法については後述する。チャイルドシートとは、ＣＲＳ（Child Restraint System）とも称され、幼児用拘束装置の一つである。チャイルドシートは、幼児用に限られず、学童用でもよい。 The determination unit 70 determines whether the object on the seat 2 of the vehicle is an occupant or a child seat based on the detection state of the buckle switch 13 and the detection state of the vital signs by the detection unit 30 . A detailed determination method will be described later. A child seat is also called a CRS (Child Restraint System) and is one of child restraint systems. Child seats are not limited to those for infants, and may be for school children.
　検知部３０及び判定部７０は、例えば、一又は複数のコンピュータ（具体的には、マイクロコンピュータ）を含む集積回路である。検知部３０及び判定部７０は、それぞれ異なる集積回路によって実現されてもよいし、一の集積回路に一体化されてもよい。コンピュータは、ＣＰＵ（Central Processing Unit）等のプロセッサ及びメモリを有する。検知部３０及び判定部７０の各機能は、メモリに記憶されたプログラムによってプロセッサが動作することにより実現される。検知部３０及び判定部７０の各機能は、ＦＰＧＡ（Field Programmable Gate Array）又はＡＳＩＣ（Application Specific Integrated Circuit）によって実現されてもよい。 The detection unit 30 and the determination unit 70 are, for example, integrated circuits including one or more computers (specifically, microcomputers). The detection unit 30 and the determination unit 70 may be implemented by different integrated circuits, or may be integrated into one integrated circuit. A computer has a processor such as a CPU (Central Processing Unit) and a memory. Each function of the detection unit 30 and the determination unit 70 is realized by the processor operating according to the program stored in the memory. Each function of the detection unit 30 and the determination unit 70 may be implemented by an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit).
　出力部８０は、判定部７０による判定結果（乗員かチャイルドシートかの判定結果）を、バックル８の外部装置に有線又は無線で出力する。外部装置は、当該判定結果に基づいて、所定の制御を実行する。例えば、外部装置は、シート２上の物体が乗員であるとの判定結果の場合、エアバッグの展開要と判定し、シート２上の物体がチャイルドシートであるとの判定結果の場合、エアバッグの展開不要と判定する。 The output unit 80 outputs the result of determination by the determination unit 70 (determination result as to whether it is an occupant or a child seat) to an external device of the buckle 8 by wire or wirelessly. The external device executes predetermined control based on the determination result. For example, if the object on the seat 2 is determined to be an occupant, the external device determines that the airbag needs to be deployed, and if the object on the seat 2 is determined to be a child seat, the external device determines that the airbag is deployed. It is determined that deployment is unnecessary.
　出力部８０は、例えば、判定部７０による判定結果を、信号、光、音、振動又はそれらのいずれかの組み合わせによりバックル８の外部に出力する。 The output unit 80 outputs, for example, the determination result of the determination unit 70 to the outside of the buckle 8 in the form of a signal, light, sound, vibration, or any combination thereof.
　図３は、判定部による判定方法の第１例を示す表である。図４は、判定部による判定方法の第１例を示すフローチャートである。なお、「Ｅｍｐｔｙ」とは、物体がシート２上にない状態を表し、「ＣＲＳ」とは、チャイルドシートを表す。 FIG. 3 is a table showing a first example of the determination method by the determination unit. FIG. 4 is a flow chart showing a first example of the determination method by the determination unit. "Empty" represents a state in which there is no object on the seat 2, and "CRS" represents a child seat.
　ステップＳ１１において、判定部７０は、タング７と本体部８ａとの連結がバックルスイッチ１３により検知されているか否かを判定する。判定部７０は、当該連結がバックルスイッチ１３により検知されていない場合、バックル８の未使用状態と判定する（ステップＳ１５）。一方、判定部７０は、当該連結がバックルスイッチ１３により検知されている場合、バイタルサインが検知部３０により検知されているか否かを判定する（ステップＳ１２）。 In step S11, the determination unit 70 determines whether or not the connection between the tongue 7 and the main body 8a is detected by the buckle switch 13. If the connection is not detected by the buckle switch 13, the determination unit 70 determines that the buckle 8 is unused (step S15). On the other hand, when the connection is detected by the buckle switch 13, the determination unit 70 determines whether or not the vital signs are detected by the detection unit 30 (step S12).
　判定部７０は、バイタルサインが検知部３０により検知されている場合、シート２上の物体は乗員と判定する（ステップＳ１３）。一方、判定部７０は、バイタルサインが検知部３０により検知されていない場合、シート２上の物体はチャイルドシートと判定する（ステップＳ１４）。 The determination unit 70 determines that the object on the seat 2 is an occupant when the vital signs are detected by the detection unit 30 (step S13). On the other hand, when the vital signs are not detected by the detection unit 30, the determination unit 70 determines that the object on the seat 2 is a child seat (step S14).
　このように、図３及び図４に示す方法では、判定部７０は、タング７と本体部８ａとの連結がバックルスイッチ１３により検知され、且つ、バイタルサインが検知部３０により検知されている場合、物体は乗員と判定する。一方、判定部７０は、タング７と本体部８ａとの連結がバックルスイッチ１３により検知され、且つ、バイタルサインが検知部３０により検知されていない場合、物体はチャイルドシートと判定する。このように、シート２上の物体が乗員かチャイルドシートかの判定にバイタルサインを利用することで、シート２上の物体が乗員かチャイルドシートかを高精度に判定できる。 As described above, in the method shown in FIGS. 3 and 4 , the determination unit 70 determines whether the connection between the tongue 7 and the main body 8a is detected by the buckle switch 13 and the vital signs are detected by the detection unit 30. , the object is determined to be an occupant. On the other hand, when the connection between the tongue 7 and the body portion 8a is detected by the buckle switch 13 and the vital signs are not detected by the detection section 30, the determination section 70 determines that the object is a child seat. Thus, by using the vital signs to determine whether the object on the seat 2 is an occupant or a child seat, it can be determined with high accuracy whether the object on the seat 2 is an occupant or a child seat.
　図５は、判定部による判定方法の第２例を示す表である。図６は、判定部による判定方法の第２例を示すフローチャートである。第２例において、第１例と同様の箇所については、その説明を省略する。 FIG. 5 is a table showing a second example of the determination method by the determination unit. FIG. 6 is a flow chart showing a second example of the determination method by the determination unit. In the second example, descriptions of the same parts as in the first example are omitted.
　判定部７０は、ステップＳ１１においてタング７と本体部８ａとの連結がバックルスイッチ１３により検知されている場合、バイタルサインが検知部３０により検知されているか否かを判定する（ステップＳ１２）。判定部７０は、バイタルサインが検知部３０により検知されていない場合、センサ２０を用いて検知部３０により検知されたシートベルトの張力Ｆの大きさが所定の閾値以上か否かを判定する（ステップＳ１６）。 When the connection between the tongue 7 and the main body 8a is detected by the buckle switch 13 in step S11, the determination unit 70 determines whether vital signs are detected by the detection unit 30 (step S12). When the vital sign is not detected by the detection unit 30, the determination unit 70 determines whether or not the magnitude of the seat belt tension F detected by the detection unit 30 using the sensor 20 is equal to or greater than a predetermined threshold value ( step S16).
　ステップＳ１６において、判定部７０は、張力Ｆの大きさが所定の閾値以上の場合、シート２上の物体はチャイルドシートと判定する（ステップＳ１４）。バックル８に連結されたシートベルト４によってチャイルドシートがシート２に正しく固定されている場合、張力Ｆは比較的大きくなるからである。一方、判定部７０は、張力Ｆの大きさが所定の閾値未満の場合、シートベルトの不適正使用状態と判定する（ステップＳ１７）。バックル８に連結されたシートベルト４によってチャイルドシートがシート２に正しく固定されていなければ、張力Ｆは比較的小さくなるからである。 In step S16, the determination unit 70 determines that the object on the seat 2 is a child seat when the magnitude of the tension F is equal to or greater than a predetermined threshold (step S14). This is because the tension F is relatively large when the child seat is correctly fixed to the seat 2 by the seat belt 4 connected to the buckle 8 . On the other hand, when the magnitude of the tension F is less than the predetermined threshold value, the determination unit 70 determines that the seat belt is in an improper use state (step S17). This is because if the child seat is not properly secured to the seat 2 by the seat belt 4 connected to the buckle 8, the tension F will be relatively small.
　ステップＳ１７での不適正使用状態には、例えば、チャイルドシートが正しく固定されていない状態、チャイルドシート以外の物体がシート２に固定されている状態、ダミーのタング７がバックル８と連結されている状態、シートベルト４がクリップで留められてシートベルト４が弛んでいる状態などがある。 The improper use states in step S17 include, for example, a state in which the child seat is not properly fixed, a state in which an object other than the child seat is fixed to the seat 2, a state in which the dummy tongue 7 is connected to the buckle 8, There is a state where the seat belt 4 is clipped and the seat belt 4 is loose.
　出力部８０は、判定部７０がシートベルトの不適正使用状態とステップＳ１７で判定した場合、警報を出力してもよい。これにより、乗員に対して、不適正使用状態を認知させ、不適正使用状態の解消を促すことができる。 The output unit 80 may output an alarm when the determination unit 70 determines in step S17 that the seat belt is in an improper use state. As a result, it is possible to make the occupant aware of the improper use state and to encourage the occupant to eliminate the improper use state.
　図７は、判定部による判定方法の第３例を示す表である。図８は、判定部による判定方法の第３例を示すフローチャートである。第３例において、第１例及び第２例と同様の箇所については、その説明を省略する。 FIG. 7 is a table showing a third example of the determination method by the determination unit. FIG. 8 is a flow chart showing a third example of the determination method by the determination unit. In the third example, descriptions of the same parts as in the first and second examples will be omitted.
　ステップＳ１８において、判定部７０は、シート２上の物体の存在が、シート２に設けられたシートセンサ９０により検知されたか否かを判定する。 In step S<b>18 , the determination unit 70 determines whether or not the presence of an object on the seat 2 has been detected by the seat sensor 90 provided on the seat 2 .
　シートセンサ９０（図１及び図２参照）は、シート２上の物体の存在を検出し、その検出結果を出力する。シートセンサ９０は、例えば、シート２のクッション（座部）又はシートレールに設けられる。シートセンサ９０による検出結果は、有線又は無線を介して、バックル８内の判定部７０に入力される。シートセンサ９０は、シート２上の物体の存在の有無に応じて変化する出力信号を出力する。 A seat sensor 90 (see FIGS. 1 and 2) detects the presence of an object on the seat 2 and outputs the detection result. The seat sensor 90 is provided on, for example, a cushion (seat portion) of the seat 2 or a seat rail. A result of detection by the seat sensor 90 is input to the determination section 70 in the buckle 8 via a wired or wireless connection. The sheet sensor 90 outputs an output signal that changes according to the presence or absence of an object on the sheet 2 .
　シートセンサ９０は、例えば、シート２に加わる荷重を歪み又は静電容量などにより検出する荷重センサである。物体がシート２上に存在しない、又は、シート２上の物体が比較的軽い物品の場合、シート２の加わる荷重は所定荷重値未満になるので、物体の存在なしと検出される。乗員又はチャイルドシートがシート２上に存在する場合、シート２に加わる荷重は所定荷重値以上になるので、物体の存在ありと検出される。 The seat sensor 90 is, for example, a load sensor that detects the load applied to the seat 2 by distortion or capacitance. If there is no object on the sheet 2 or if the object on the sheet 2 is a relatively light article, the load applied to the sheet 2 will be less than the predetermined load value, so the absence of the object is detected. When an occupant or a child seat is present on the seat 2, the load applied to the seat 2 is greater than or equal to the predetermined load value, so the existence of the object is detected.
　図８のステップＳ１８において、判定部７０は、物体の存在がシートセンサ９０により検出されていない場合、シート２は空席と判定する（ステップＳ１９）。一方、判定部７０は、物体の存在がシートセンサ９０により検出されている場合、シート２上の物体が乗員かチャイルドシートかを判定する（ステップＳ１１～Ｓ１５）。シートセンサ９０の検出結果を利用することで、空席か否かを判定することができる。 In step S18 of FIG. 8, if the presence of an object is not detected by the seat sensor 90, the determination unit 70 determines that the seat 2 is vacant (step S19). On the other hand, when the presence of an object is detected by the seat sensor 90, the determination unit 70 determines whether the object on the seat 2 is an occupant or a child seat (steps S11 to S15). By using the detection result of the seat sensor 90, it is possible to determine whether or not the seat is vacant.
　図９は、判定部による判定方法の第４例を示す表である。図１０は、判定部による判定方法の第４例を示すフローチャートである。第４例は、第２例（図５及び図６）に、第３例（図７及び図８）のステップＳ１８，Ｓ１９の処理が追加された方法である。第４例によれば、第２例と第３例の両方の効果が得られる。 FIG. 9 is a table showing a fourth example of the determination method by the determination unit. FIG. 10 is a flow chart showing a fourth example of the determination method by the determination unit. A fourth example is a method in which steps S18 and S19 of the third example (FIGS. 7 and 8) are added to the second example (FIGS. 5 and 6). According to the fourth example, the effects of both the second example and the third example are obtained.
　次に、本実施形態に係るバックルの具体例について説明する。なお、理解の容易のため、図面における各部の縮尺は、実際とは異なる場合がある。平行、直角、直交、水平、垂直、上下、左右などの方向には、実施形態の効果を損なわない程度のずれが許容される。角部の形状は、直角に限られず、弓状に丸みを帯びてもよい。Ｘ軸方向、Ｙ軸方向、Ｚ軸方向は、それぞれ、Ｘ軸に平行な方向、Ｙ軸に平行な方向、Ｚ軸に平行な方向を表す。Ｘ軸方向とＹ軸方向とＺ軸方向は、互いに直交する。ＸＹ平面、ＹＺ平面、ＺＸ平面は、それぞれ、Ｘ軸方向及びＹ軸方向に平行な仮想平面、Ｙ軸方向及びＺ軸方向に平行な仮想平面、Ｚ軸方向及びＸ軸方向に平行な仮想平面を表す。 Next, a specific example of the buckle according to this embodiment will be described. For ease of understanding, the scale of each part in the drawings may differ from the actual scale. In directions such as parallel, right angle, orthogonal, horizontal, vertical, up and down, left and right, misalignment to the extent that the effects of the embodiment are not impaired is allowed. The shape of the corners is not limited to right angles, and may be arcuately rounded. The X-axis direction, Y-axis direction, and Z-axis direction represent directions parallel to the X-axis, directions parallel to the Y-axis, and directions parallel to the Z-axis, respectively. The X-axis direction, the Y-axis direction, and the Z-axis direction are orthogonal to each other. The XY plane, YZ plane, and ZX plane are virtual planes parallel to the X-axis direction and Y-axis direction, virtual planes parallel to the Y-axis direction and Z-axis direction, and virtual planes parallel to the Z-axis direction and X-axis direction, respectively. represents
　図１１は、第１実施形態に係るバックルの外観正面図である。図１２は、本実施形態に係るバックルの断面Ａ－Ａにおける断面図である。Ｘ軸方向は、バックル８の幅方向を表す。Ｙ軸方向は、車両に搭載された状態でのバックル８の高さ方向を表す。Ｚ軸方向は、バックル８の厚さ方向を表す。 FIG. 11 is an external front view of the buckle according to the first embodiment. FIG. 12 is a cross-sectional view of the buckle according to the present embodiment, taken along the line AA. The X-axis direction represents the width direction of the buckle 8 . The Y-axis direction represents the height direction of the buckle 8 when mounted on the vehicle. The Z-axis direction represents the thickness direction of the buckle 8 .
　図１３は、本実施形態に係るバックルの分解斜視図である。図１４は、本実施形態に係るバックルの一部の部品の分解斜視図である。図１３及び図１４に示すように、バックル８（本体部８ａ）は、バックル本体８ｃ、回路基板１６、アッパーカバー１２、ロアカバー１４、レバー４０及び板バネ５０を備える。 FIG. 13 is an exploded perspective view of the buckle according to this embodiment. FIG. 14 is an exploded perspective view of some parts of the buckle according to this embodiment. As shown in FIGS. 13 and 14, the buckle 8 (body portion 8a) includes a buckle body 8c, a circuit board 16, an upper cover 12, a lower cover 14, a lever 40 and a leaf spring 50. As shown in FIGS.
　バックル本体８ｃは、シートベルトに取り付けられたタングと連結可能なサブアッセンブリ品である。バックル本体８ｃは、例えば、タングとバックルとの連結を解除するプッシュ操作を乗員の手指から受けるボタン３１と、ボタン３１等のバックル本体８ｃの構成部品を保持するバックルベース３７とを有する。バックル本体８ｃには、タングの金属プレートが挿入される挿入口１５が形成されている。 The buckle body 8c is a subassembly that can be connected to the tongue attached to the seat belt. The buckle main body 8c has, for example, a button 31 that receives a push operation for releasing the connection between the tongue and the buckle from the occupant's fingers, and a buckle base 37 that holds the components of the buckle main body 8c such as the button 31. The buckle main body 8c is formed with an insertion opening 15 into which the metal plate of the tongue is inserted.
　アッパーカバー１２は、ボタン３１が露出するようにバックル本体８ｃを覆う樹脂部品である。アッパーカバー１２は、ロアカバー１４との間にバックル本体８ｃを挟んで保持する。この実施形態では、レバー４０がアッパーカバー１２に取り付けられている。レバー４０は、Ｘ軸方向に突出するピボット４１を有し、ピボット４１を中心に回転可能にアッパーカバー１２に支持されている。 The upper cover 12 is a resin part that covers the buckle body 8c so that the button 31 is exposed. The upper cover 12 and the lower cover 14 sandwich and hold the buckle main body 8c. A lever 40 is attached to the upper cover 12 in this embodiment. The lever 40 has a pivot 41 projecting in the X-axis direction and is rotatably supported by the upper cover 12 around the pivot 41 .
　回路基板１６は、この実施形態では、図２に示す構成（センサ２０、バックルスイッチ１３のホールセンサ１３ａ、検知部３０、判定部７０及び出力部８０）を備える。 The circuit board 16, in this embodiment, has the configuration shown in FIG.
　ロアカバー１４は、回路基板１６が固定される内側表面を有するバックルカバーの一例である。ロアカバー１４は、回路基板１６を覆う樹脂部品である。 The lower cover 14 is an example of a buckle cover having an inner surface to which the circuit board 16 is fixed. The lower cover 14 is a resin component that covers the circuit board 16 .
　アッパーカバー１２及びロアカバー１４は、バックル８の外形カバーであり、バックル本体８ｃ、回路基板１６、レバー４０及び板バネ５０を収める筐体である。本実施形態では、これらの部品を収めるため、バックル８の外形カバーは、アッパーカバー１２とロアカバー１４の二つの部品によって構成されているが、三つ以上の部品によって構成されてもよい。 The upper cover 12 and the lower cover 14 are outer covers of the buckle 8, and are housings that house the buckle main body 8c, the circuit board 16, the lever 40 and the leaf spring 50. In this embodiment, the outer cover of the buckle 8 is composed of two parts, the upper cover 12 and the lower cover 14, in order to accommodate these parts, but it may be composed of three or more parts.
　バックル８が車両に取り付けられた状態で、アッパーカバー１２は、バックル８にタングを介して連結されるシートベルトを着用する乗員とは反対側に面し、ロアカバー１４は、当該乗員側に面する。 With the buckle 8 attached to the vehicle, the upper cover 12 faces the side opposite to the occupant wearing the seat belt connected to the buckle 8 via the tongue, and the lower cover 14 faces the occupant. .
　図１５，１６，１７は、シートベルトの張力の検知機構を説明するための断面図である。タング７がバックル８に挿入されると（図１５参照）、タング７の先端部はエジェクタ３３に接触する。タング７の先端部との接触により押されたエジェクタ３３は、タング７が挿し込まれる方向に移動して、ラッチ３４が回転するとともに、スライダ３２が下がる。ラッチ３４の回転により、ラッチ３４はタング７に係合し、スライダ３２がロックピン３５の下に入り込む（図１６参照）。 15, 16, and 17 are cross-sectional views for explaining a seat belt tension detection mechanism. When the tongue 7 is inserted into the buckle 8 (see FIG. 15), the tip of the tongue 7 contacts the ejector 33 . The ejector 33 pushed by contact with the tip of the tongue 7 moves in the direction in which the tongue 7 is inserted, the latch 34 rotates, and the slider 32 descends. Rotation of the latch 34 causes the latch 34 to engage the tongue 7 and the slider 32 to enter under the lock pin 35 (see FIG. 16).
　挿入口１５は、ボタン３１とレバー４０との間にある隙間である。挿入口１５の開口高さｅ（図１５参照）は、その隙間の高さによって決まる。レバー４０の初期位置状態での挿入口１５の開口高さｅがタング７の板厚ｄよりも僅かに狭くなるように、レバー４０及び板バネ５０は形成されている。そのため、図１６において、タング７を挿入口１５に挿入すると、レバー４０は、タング７により作用点Ｐ２で押されることでピボット４１を中心に時計周りに僅かに回転する。板バネ５０は、僅かに回転するレバー４０によって押し込まれる。レバー４０により押し込まれた板バネ５０の弾性力によって、ボタン３１とレバー４０との間でのタング７のがたつきが抑えられる。これにより、シートベルトの張力Ｆの微小な変化は、タング７、レバー４０及び板バネ５０を介して、センサ２０に精度良く伝わる。その結果、センサ２０は、張力Ｆの微小な変化を高精度に検知できる。 The insertion slot 15 is a gap between the button 31 and the lever 40. The opening height e (see FIG. 15) of the insertion port 15 is determined by the height of the gap. The lever 40 and leaf spring 50 are formed so that the opening height e of the insertion port 15 in the initial position state of the lever 40 is slightly narrower than the plate thickness d of the tongue 7 . Therefore, in FIG. 16, when the tongue 7 is inserted into the insertion opening 15, the lever 40 is pushed by the tongue 7 at the point of action P2 to slightly rotate clockwise about the pivot 41. As shown in FIG. Leaf spring 50 is pushed in by slightly rotating lever 40 . The elastic force of the leaf spring 50 pushed by the lever 40 suppresses rattling of the tongue 7 between the button 31 and the lever 40 . As a result, minute changes in the tension F of the seat belt are accurately transmitted to the sensor 20 via the tongue 7 , the lever 40 and the leaf spring 50 . As a result, the sensor 20 can detect minute changes in the tension F with high accuracy.
　図１７において、タング７の力点Ｐ１にかかる荷重（張力Ｆ）により、タング７は、バックルベース３７の上壁３７ａを支点Ｐ３として、レバー４０の上面を作用点Ｐ２で押し込む。作用点Ｐ２でタング７に押し込まれたレバー４０は、ピボット４１を中心に時計回りに回転し、板バネ５０を押し込む。板バネ５０は、荷重を受け、それ自身がたわみながら、センサ２０へ力を伝達する。バックルベース３７の下壁３７ｂは、下壁３７ｂ側へのタング７の移動を規制するメカニカルストッパを有する。タング７はメカニカルストッパに接触することで、下壁３７ｂ側へのタング７の移動は止まる。メカニカルストッパにより、レバー４０及び板バネ５０を介してセンサ２０に加わる力を制限することができ、センサ２０を衝突などによる大荷重から保護できる。 In FIG. 17, due to the load (tension F) applied to the force point P1 of the tongue 7, the tongue 7 pushes the upper surface of the lever 40 at the action point P2 with the upper wall 37a of the buckle base 37 as the fulcrum P3. The lever 40 pushed into the tongue 7 at the action point P2 rotates clockwise about the pivot 41 and pushes the leaf spring 50.例文帳に追加Leaf spring 50 receives a load and transmits force to sensor 20 while bending itself. A lower wall 37b of the buckle base 37 has a mechanical stopper that restricts movement of the tongue 7 toward the lower wall 37b. The movement of the tongue 7 toward the lower wall 37b stops when the tongue 7 comes into contact with the mechanical stopper. The mechanical stopper can limit the force applied to the sensor 20 via the lever 40 and leaf spring 50, and can protect the sensor 20 from a large load due to collision or the like.
　図１８は、第２実施形態に係るバックルの構成の一例を示すブロック図である。第２実施形態のうち第１実施形態と同様の構成、作用及び効果についての説明は、上述の説明を援用することで省略又は簡略する。 FIG. 18 is a block diagram showing an example of the configuration of the buckle according to the second embodiment. In the second embodiment, descriptions of the same configurations, actions, and effects as in the first embodiment are omitted or simplified by citing the above descriptions.
　第１実施形態（図２参照）では、判定部７０及び出力部８０は、バックル８に設けられているのに対し、第２実施形態（図１８参照）では、判定部７０及び出力部８０は、バックル８とは異なる箇所に配置された別のデバイスに設けられている。図１８に示す判定システム１００は、バックル８、判定部７０及び出力部８０を備え、更に、シートセンサ９０を備えてもよい。 In the first embodiment (see FIG. 2), the determination unit 70 and the output unit 80 are provided in the buckle 8, whereas in the second embodiment (see FIG. 18), the determination unit 70 and the output unit 80 are , on a separate device located at a different location than the buckle 8 . A determination system 100 shown in FIG. 18 includes a buckle 8 , a determination section 70 and an output section 80 , and may further include a seat sensor 90 .
　第２実施形態では、バックル８は、バックルスイッチ１３，センサ２０及び検知部３０を備える。判定部７０及び出力部８０は、例えば、車両に搭載された電子制御装置（いわゆる、ＥＣＵ）のような判定装置によって実現される。第２実施形態によれば、車両のシート２上の物体が乗員かチャイルドシートかを、バックル８の外部の判定装置（判定部７０）により高精度に判定することができる。 In the second embodiment, the buckle 8 includes the buckle switch 13, the sensor 20 and the detection section 30. The determination unit 70 and the output unit 80 are implemented by, for example, a determination device such as an electronic control unit (so-called ECU) mounted on the vehicle. According to the second embodiment, whether an object on the seat 2 of the vehicle is an occupant or a child seat can be determined with high accuracy by the determination device (determination section 70) outside the buckle 8. FIG.
　以上、実施形態を説明したが、本発明は上記実施形態に限定されない。他の実施形態の一部又は全部との組み合わせや置換などの種々の変形及び改良が可能である。 Although the embodiments have been described above, the present invention is not limited to the above embodiments. Various modifications and improvements such as combination or replacement with part or all of other embodiments are possible.
　例えば、シート２は、車両の前側座席でもよいし、後部座席でもよい。また、図１８において、検知部３０は、バックル８とは異なる箇所に配置された別のデバイスに設けられてもよく、当該別のデバイスは、判定部７０と同じデバイスでも異なるデバイスでもよい。 For example, the seat 2 may be the front seat or the rear seat of the vehicle. Further, in FIG. 18 , the detection unit 30 may be provided in another device arranged at a location different from the buckle 8 , and the another device may be the same device as or different from the determination unit 70 .
　本国際出願は、２０２１年６月３０日に出願した日本国特許出願第２０２１－１０９３３０号に基づく優先権を主張するものであり、日本国特許出願第２０２１－１０９３３０号の全内容を本国際出願に援用する。 This international application claims priority based on Japanese Patent Application No. 2021-109330 filed on June 30, 2021, and the entire content of Japanese Patent Application No. 2021-109330 is to refer to.
　１　シートベルト装置
　４　シートベルト
　７　タング
　８　バックル
　８ａ　本体部
　８ｂ　ステー
　８ｃ　バックル本体
　１２　アッパーカバー
　１３　バックルスイッチ
　１３ａ　ホールセンサ
　１４　ロアカバー
　１５　挿入口
　１６　回路基板
　２０　センサ
　３０　検知部
　４０　レバー
　４１　ピボット
　５０　板バネ
　７０　判定部
　８０　出力部
　９０　シートセンサ
　１００　判定システム 1 seatbelt device 4 seatbelt 7 tongue 8 buckle 8a main body 8b stay 8c buckle main body 12 upper cover 13 buckle switch 13a hall sensor 14 lower cover 15 insertion opening 16 circuit board 20 sensor 30 detector 40 lever 41 pivot 50 leaf spring 70 judgment Section 80 Output Section 90 Sheet Sensor 100 Judgment System

Claims (10)

  1. 　車両のシートベルトに取り付けられたタングと連結可能な本体部と、
    　前記タングと前記本体部との連結の有無を検知するバックルスイッチと、
    　前記シートベルトの張力変化を検知するセンサと、
    　前記センサにより検知された張力変化に基づいて、呼吸又は脈拍であるバイタルサインを検知する検知部と、
    　前記バックルスイッチの検知状態と前記バイタルサインの検知状態に基づいて、前記車両のシート上の物体が乗員かチャイルドシートかを判定する判定部と、を備える、バックル。     a main body connectable to a tongue attached to a seat belt of a vehicle;
    a buckle switch for detecting whether or not the tongue and the main body are connected;
    a sensor for detecting changes in tension of the seat belt;
    a detection unit that detects vital signs such as respiration or pulse based on changes in tension detected by the sensor;
    a determination unit that determines whether an object on the seat of the vehicle is an occupant or a child seat based on the detection state of the buckle switch and the detection state of the vital signs.
  2. 　前記判定部は、前記連結が前記バックルスイッチにより検知され、且つ、前記バイタルサインが前記検知部により検知されている場合、前記物体は乗員と判定し、前記連結が前記バックルスイッチにより検知され、且つ、前記バイタルサインが前記検知部により検知されていない場合、前記物体はチャイルドシートと判定する、請求項１に記載のバックル。 The determination unit determines that the object is an occupant when the connection is detected by the buckle switch and the vital sign is detected by the detection unit, the connection is detected by the buckle switch, and 2. The buckle according to claim 1, wherein said object is determined to be a child seat when said vital sign is not detected by said detection unit.
  3. 　前記判定部は、前記連結が前記バックルスイッチにより検知され、且つ、前記バイタルサインが前記検知部により検知されず、且つ、前記センサを用いて検知された前記シートベルトの張力が閾値以上の場合、前記物体はチャイルドシートと判定する、請求項２に記載のバックル。 When the connection is detected by the buckle switch, the vital signs are not detected by the detection unit, and the tension of the seat belt detected by the sensor is equal to or greater than a threshold, 3. Buckle according to claim 2, wherein the object is determined to be a child seat.
  4. 　前記判定部は、前記連結が前記バックルスイッチにより検知され、且つ、前記バイタルサインが前記検知部により検知されず、且つ、前記センサを用いて検知された前記シートベルトの張力が閾値未満の場合、前記シートベルトの不適正使用状態と判定する、請求項３に記載のバックル。 When the connection is detected by the buckle switch, the vital signs are not detected by the detection unit, and the tension of the seat belt detected by the sensor is less than a threshold, 4. The buckle according to claim 3, wherein the seat belt is determined to be in an improper use state.
  5. 　前記不適正使用状態は、チャイルドシートが正しく固定されていない状態である、請求項４に記載のバックル。 The buckle according to claim 4, wherein the improper use state is a state in which the child seat is not properly secured.
  6. 　前記判定部は、前記物体の存在が、シートに設けられたシートセンサにより検出されている場合、前記物体が乗員かチャイルドシートかを判定する、請求項１に記載のバックル。 The buckle according to claim 1, wherein the determination unit determines whether the object is an occupant or a child seat when presence of the object is detected by a seat sensor provided on the seat.
  7. 　前記判定部は、前記物体の存在が前記シートセンサにより検出されていない場合、前記シートは空席と判定する、請求項６に記載のバックル。 The buckle according to claim 6, wherein the determination unit determines that the seat is vacant when the existence of the object is not detected by the seat sensor.
  8. 　車両のシートベルトに取り付けられたタングと連結可能なバックルと、
    　前記バックルとは異なる箇所に配置された判定装置と、を備え、
    　前記バックルは、
    　前記タングと前記バックルとの連結の有無を検知するバックルスイッチと、
    　前記シートベルトの張力変化を検知するセンサと、
    　前記センサにより検知された張力変化に基づいて、呼吸又は脈拍であるバイタルサインを検知する検知部と、を有し、
    　前記判定装置は、前記バックルスイッチの検知状態と前記バイタルサインの検知状態に基づいて、前記車両のシート上の物体が乗員かチャイルドシートかを判定する、判定システム。     a buckle connectable to a tongue attached to a seat belt of a vehicle;
    and a determination device arranged at a location different from the buckle,
    The buckle is
    a buckle switch for detecting whether or not the tongue and the buckle are connected;
    a sensor for detecting changes in tension of the seat belt;
    a detection unit that detects vital signs such as respiration or pulse based on changes in tension detected by the sensor;
    The determination system, wherein the determination device determines whether an object on the seat of the vehicle is an occupant or a child seat based on the detection state of the buckle switch and the detection state of the vital sign.
  9. 　シートに設けられ、前記物体の存在を検出するシートセンサを有し、
    　前記判定装置は、前記物体の存在が前記シートセンサにより検出されている場合、前記物体が乗員かチャイルドシートかを判定する、請求項８に記載の判定システム。     a seat sensor provided on the seat for detecting the presence of the object;
    9. The determination system according to claim 8, wherein said determination device determines whether said object is an occupant or a child seat when presence of said object is detected by said seat sensor.
  10. 　車両のシートベルトに取り付けられたタングと、バックルとの連結の有無を検知し、
    　前記シートベルトの張力変化を検知し、
    　検知された張力変化に基づいて、呼吸又は脈拍であるバイタルサインを検知し、
    　前記連結の検知状態と前記バイタルサインの検知状態に基づいて、前記車両のシート上の物体が乗員かチャイルドシートかを判定する、判定方法。     Detects the presence or absence of connection between the tongue attached to the seat belt of the vehicle and the buckle,
    detecting a change in tension of the seat belt;
    Detecting vital signs such as respiration or pulse based on the detected tension change,
    A determination method for determining whether an object on a seat of the vehicle is an occupant or a child seat based on the detection state of the connection and the detection state of the vital signs.
PCT/JP2022/020551 2021-06-30 2022-05-17 Buckle, determination system, and determination method WO2023276474A1 (en)

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JP2021109330A JP2023006626A (en) 2021-06-30 2021-06-30 Buckle, determination system, and method

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Citations (5)

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JP2019122652A (en) * 2018-01-18 2019-07-25 Ｊｏｙｓｏｎ Ｓａｆｅｔｙ Ｓｙｓｔｅｍｓ Ｊａｐａｎ株式会社 Buckle, arousal state determination system, and arousal state determination method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003095060A (en) * 2001-09-25 2003-04-03 Aisin Seiki Co Ltd Occupant judgement device
JP2008522883A (en) * 2004-12-07 2008-07-03 アイイーイー インターナショナル エレクトロニクス アンド エンジニアリング エス．エイ． Child seat detector
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