JP2019014445A - Seat belt retractor - Google Patents

Abstract

To provide a seat belt retractor which can reduce manufacturing costs.SOLUTION: A seat belt retractor comprises a spool for winding a seat belt, a motor for rotating the spool, a driving control circuit 43 for controlling driving of the motor, and a substrate 40A with the driving control circuit 43 mounted thereon. The substrate 40A comprises a first substrate terminal group connected to the driving control circuit 43 and a second substrate terminal group connected to the driving control circuit 43. The first substrate terminal group is positioned so that an insertion port of a first connector 41 faces the vehicle interior side with the seat belt retractor installed at a vehicle right side when the first connector 41 is attached to the first substrate terminal group, and the second substrate terminal group is positioned so that an insertion port of a second connector 42 faces the vehicle interior side with the seat belt retractor installed at a vehicle left side when the second connector 42 is attached to the second substrate terminal group.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a seat belt retractor.

  2. Description of the Related Art Conventionally, a seat belt retractor including a spool that winds up a seat belt, a motor that rotates the spool, an ECU board that drives and controls the motor, and a connector that is connected to the ECU board so that the insertion port faces the inside of the vehicle. It is known (see, for example, Patent Document 1).

JP 2009-46097 A

  The position and shape of the place where the seat belt retractor (hereinafter simply referred to as “retractor”) is installed in the vehicle are substantially symmetrical on the right side and the left side of the vehicle. Therefore, when retractors with the same configuration are installed on both the left and right sides of the vehicle so that the connector insertion holes face the inside of the vehicle on both the right and left sides of the vehicle, the position where the seat belt is pulled out from the retractor is It may shift in the front-rear direction.

  For example, FIG. 1 is a diagram schematically illustrating an example in which two retractors 3 having the same configuration are respectively installed on the right side of the vehicle 1 and the left side of the vehicle 1 from a viewpoint from above the vehicle 1. is there. The retractor 3 includes a spool 2 that rotates around a rotation shaft 7 and winds up a seat belt, a board 4 on which a circuit that controls driving of a motor that rotates the spool 2 is mounted, and a connector 5 that is connected to the board 4. With. A connector 5R wired to the right side of the vehicle is connected to the connector 5 of the retractor 3 on the right side of the vehicle, and a vehicle side connector 8L wired to the left side of the vehicle is connected to the connector 5 of the retractor 3 on the left side of the vehicle. Is done. FIG. 1 shows that the center line 6 passing through the position where the seat belt is pulled out from the retractor 3 is shifted in the vehicle front-rear direction between the vehicle right side and the vehicle left side.

  Therefore, in order to prevent the position where the seat belt is pulled out from the retractor in the vehicle front-rear direction between the right side and the left side of the vehicle, the retractor configuration may be different between the right side and the left side of the vehicle.

  For example, FIG. 2 is a diagram schematically illustrating an example in which two retractors 3R and 3L having different configurations are installed on the right side and the left side of the vehicle, respectively, from the viewpoint of the vehicle 1 from above. The retractor 3R on the right side of the vehicle is connected to the spool 2R that winds up the seat belt, the substrate 4R on which a circuit that controls the drive of the motor that rotates the spool 2R is mounted, and the substrate 4R so that the insertion port faces the inside of the vehicle. Connector 5R. The retractor 3R is configured such that the substrate 4R is disposed on the right side of the spool 2R when viewed from the viewpoint facing the insertion port of the connector 5R. On the other hand, the retractor 3L on the left side of the vehicle has a spool 2L that winds up the seat belt, a substrate 4L on which a circuit that controls driving of a motor that rotates the spool 2L is mounted, and a substrate 4L that has an insertion port facing the inside of the vehicle. And a connected connector 5L. The retractor 3L is configured such that the substrate 4L is disposed on the left side of the spool 2L when viewed from the viewpoint facing the insertion port of the connector 5L.

  However, since two types of boards are manufactured, the board 4R designed so that the insertion port of the connector 5R faces the inside of the vehicle and the board 4L designed so that the insertion port of the connector 5L faces the inside of the car, Manufacturing costs may increase.

  Therefore, in the present disclosure, a seat belt retractor capable of reducing the manufacturing cost is provided.

In one aspect of the present disclosure,
A spool that winds up the seat belt;
A motor for rotating the spool;
A drive control circuit for controlling the drive of the motor;
A seat belt retractor comprising a substrate on which the drive control circuit is mounted,
The board includes a first board terminal group connected to the drive control circuit, and a second board terminal group connected to the drive control circuit,
When the first connector is attached to the first board terminal group, the first connector is arranged so that the insertion port of the first connector faces the vehicle inner side in a state where the seat belt retractor is installed on the right side of the vehicle. The board terminal group of
When the second connector is attached to the second board terminal group, the second connector is arranged so that the insertion port of the second connector faces the vehicle inner side in a state where the seat belt retractor is installed on the left side of the vehicle. A seat belt retractor is provided in which the board terminal groups are arranged.

  According to the present disclosure, a common substrate can be used for both the seat belt retractor installed on the right side of the vehicle and the seat belt retractor installed on the left side of the vehicle, thereby reducing the manufacturing cost of the substrate, and thus the manufacturing cost of the seat belt retractor. can do.

It is a figure which shows typically an example at the time of the vehicle from the viewpoint from the upper direction of two retractors with the same structure each installed in the vehicle right side and the vehicle left side. It is a figure which shows typically an example at the time of installing two retractors from which the structure differs in the vehicle right side and the vehicle left side respectively from the viewpoint from the upper direction of a vehicle. It is a figure which shows an example of a structure of a seatbelt apparatus. It is a side view which shows an example of a structure of a seatbelt retractor. It is a rear view which shows an example of a structure of a seatbelt retractor. It is a top view which shows typically the 1st structural example of a board | substrate. An example of the state which the insertion port of a connector has faced the vehicle inner side in the state in which the retractor was installed in the vehicle right side is shown. An example of the state which the insertion port of a connector has faced the vehicle inner side in the state in which the retractor was installed in the vehicle left side is shown. It is a top view which shows typically the 2nd structural example of a board | substrate. It is a top view which shows the 3rd structural example of a board | substrate typically. It is a top view which shows the 3rd structural example of a board | substrate typically.

  Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings.

  FIG. 3 is a diagram illustrating an example of the configuration of the seat belt device. A seat belt device 101 shown in FIG. 3 is an example of a seat belt device mounted on a vehicle. The seat belt device 101 includes, for example, a seat belt 104, a retractor 103, a shoulder anchor 106, a tongue 107, and a buckle 108.

  The seat belt 104 is an example of a seat belt that restrains an occupant 111 sitting on the seat 102 of the vehicle, and is a belt-like member that is wound around the retractor 103 so as to be drawn out. The seat belt is also referred to as webbing. The belt anchor 105 at the front end of the seat belt 104 is fixed to the seat 102 or a vehicle body near the seat 102.

  The retractor 103 is an example of a seat belt retractor that enables the seat belt 104 to be retracted or pulled out. The retractor 103 restricts the seat belt 104 from being pulled out of the retractor 103 when an acceleration / deceleration or a vehicle angle greater than or equal to a predetermined value is detected during a vehicle collision or the like. The retractor 103 is fixed to the seat 102 or a vehicle body near the seat 102. The retractor 103 is an example of a seat belt retractor.

  The retractor 103 may have a function of winding the seat belt 104 around the spool by the power of the motor 103a. For example, before the vehicle collision, the retractor 103 operates the motor 103a based on a signal from a sensor such as a millimeter wave radar to wind the seat belt 104 around the spool, and applies pre-tension to the seat belt 104 to give the seat belt 104 The occupant restraint by is quickly performed. For example, when the connection between the tongue 107 and the buckle 108 is released, the retractor 103 operates the motor 103a to wind the seat belt 104 with a spool. For example, the retractor 103 operates the motor 103a and adjusts the tension of the seat belt 104 according to the driving situation (the state of the vehicle), thereby restraining the passenger by the seat belt 104 and comfort when the seat belt 104 is worn. Improve each sex.

  The state of the vehicle includes, for example, whether the seat belt 104 is pulled out, whether the occupant 111 is present, the traveling speed of the vehicle, the acceleration of the vehicle, the steering operation, the accelerator operation, the brake operation, the operation of the buckle 108, the door operation, and the occupant operation. This refers to a state that represents a possible operation input of an on-vehicle selection switch.

  The shoulder anchor 106 is an example of a belt insertion tool through which the seat belt 104 is inserted, and is a member that guides the seat belt 104 pulled out from the retractor 103 toward the shoulder portion of the occupant 111. The shoulder anchor 106 is fixed to the seat 102 or the vehicle body near the seat 102.

  The tongue 107 is an example of a belt insertion tool through which the seat belt 104 is inserted, and is a component that is slidably attached to the seat belt 104 guided by the shoulder anchor 106.

  The buckle 108 is a part into which a flat engaging portion of the tongue 107 attached to the seat belt 104 is inserted and removed, and the tongue 107 is detachably connected thereto. The buckle 108 is fixed to the floor of the vehicle body or the seat 102, for example.

  In a state where the tongue 107 is connected to the buckle 108, the portion of the seat belt 104 between the shoulder anchor 106 and the tongue 107 is a shoulder belt portion 109 that restrains the chest and shoulders of the occupant 111. In a state where the tongue 107 is connected to the buckle 108, the portion of the seat belt 104 between the belt anchor 105 and the tongue 107 is a lap belt portion 110 that restrains the waist of the occupant 111.

  FIG. 4 is a side view showing an example of the configuration of the seat belt retractor. FIG. 5 is a rear view showing an example of the configuration of the seat belt retractor. A retractor 103R shown in FIGS. 4 and 5 is an example of the retractor 103 (see FIG. 3), and is a seat belt retractor installed on the right side of the vehicle with respect to the center line in the longitudinal direction of the vehicle.

  Next, the configuration of the retractor 103R will be described with reference to FIGS. The retractor 103 </ b> R includes a frame 17, a spool 20, a spring mechanism 15, a motor 24, a power transmission mechanism 26, a lock mechanism 14, a substrate case 18, a retainer 16, and a substrate 40.

  The frame 17 is a housing that rotatably accommodates the spool 20 and forms a skeleton of the retractor 103R. The frame 17 includes, for example, a pair of side surface portions 17b and 17c facing each other and a back surface portion 17a connecting the side surface portions 17b and 17c. A substrate 40, a substrate case 18, a retainer 16, a spring mechanism 15, a power transmission mechanism 26, and a motor 24 are disposed outside the side surface portion 17b. A lock mechanism 14 is disposed outside the side surface portion 17c.

  The spool 20 is supported by the frame 17 so as to be rotatable about a rotation shaft 117. The spool 20 is a rotating member that winds up the seat belt 104 that restrains the occupant 111. The rotating shaft 117 is parallel (including substantially parallel) to the longitudinal direction of the vehicle.

  The spring mechanism 15 is an example of an urging mechanism. The spring mechanism 15 constantly urges the spool 20 so that the spool 20 rotates in a direction in which the seat belt 104 is wound around the spool 20 (winding direction of the seat belt). The spring mechanism 15 is fixed to the frame 17. For example, the spring mechanism 15 is accommodated in a retainer 16 fixed to the side surface portion 17 b of the frame 17 together with the substrate case 18.

  The motor 24 is an example of a motor that rotates the spool 20. The motor 24 is, for example, the above-described motor 103a. The driving of the motor 24 is controlled by a drive control circuit mounted on the substrate 40.

  The power transmission mechanism 26 changes the power of the motor 24 and transmits it to the spool 20. The power transmission mechanism 26 is fixed to the frame 17, and is fixed to the side surface portion 17 b of the frame 17 together with the retainer 16, for example.

  The locking mechanism 14 performs a locking operation that locks the rotation of the spool 20 in the pulling-out direction of the seat belt 104 by operating at least one of the vehicle sensor and the webbing sensor. The webbing sensor operates by detecting that the seat belt 104 is suddenly pulled out from the spool 20 at a pulling speed that exceeds a predetermined threshold in the direction in which the seat belt 104 is pulled out from the spool 20 (the direction in which the seat belt is pulled out). This is a first detection mechanism. The vehicle sensor is a second detection mechanism that operates by detecting that the vehicle has undergone a behavior change in which a deceleration or a vehicle angle that is greater than or equal to a predetermined value occurs, such as when a vehicle collides.

  The substrate case 18 is fixed to the frame 17 and accommodates and holds the substrate 40. The substrate case 18 is fixed to the side surface portion 17b of the frame 17, for example.

  The retainer 16 is fixed to the frame 17 together with the substrate case 18. The retainer 16 covers part or all of the substrate 40 between the retainer 16 and the substrate case 18. A substrate 40 and a substrate case 18 are sandwiched between the retainer 16 and the frame 17. The retainer 16 is formed so that the insertion port 41a of the connector 41 connected to the substrate 40 is exposed. A plurality of connector terminals 46 (eight connector terminals in the case of illustration) are arranged inside the insertion opening 41a.

  The board 40 and the connector 41 are located on the rear side of the vehicle with respect to the center line 116 passing through the position where the seat belt is pulled out from the retractor 103R. A center line 116 represents the center of the seat belt 104 wound around the spool 20 in the belt width direction.

  The substrate 40 is arranged such that the normal direction of the substrate 40 is parallel to the rotation axis 117 of the spool 20. Thereby, since the external dimension of the retractor 103R in the vehicle front-rear direction can be reduced, the size of the retractor 103R and the mountability on the vehicle are improved.

  The substrate 40 has a first substrate surface 44 on the spool 20 side and a second substrate surface 45 on the opposite side of the spool 20. The connector 41 is attached to the board 40 from the second board surface 45 side so that the insertion port 41a faces the vehicle interior side.

  The substrate 40 is disposed between the spool 20 and the spring mechanism 15. Thus, even when an impact force is applied to the retractor 103R from the outside on the spring mechanism 15 side, the substrate 40 can be protected by the retainer 16 that houses the spring mechanism 15. In the illustrated form, the substrate 40 is particularly disposed between the frame 17 and the spring mechanism 15. Thus, even when an external impact force is applied to the retractor 103 </ b> R, the substrate 40 can be protected by the frame 17 and the retainer 16 that houses the spring mechanism 15.

  FIG. 6 is a circuit diagram schematically illustrating a first configuration example of the substrate. A substrate 40 </ b> A illustrated in FIG. 6 is an example of the substrate 40.

  A drive control circuit 43 that controls the drive of the motor 24 is mounted on the substrate 40A. The drive control circuit 43 includes, for example, a power supply circuit, a processor such as a CPU (Central Processing Unit), a memory, a motor drive circuit, and the like. Each control function (for example, a function for controlling the drive of the motor 24) included in the drive control circuit 43 is realized by a program processed by the processor. Programs for realizing each control function are stored in the memory. The drive control circuit 43 may be configured by an application specific integrated circuit (ASIC) or a field-programmable gate array (FPGA).

  The board 40 </ b> A has a first board terminal group connected to the drive control circuit 43 and a second board terminal group connected to the drive control circuit 43.

  The first board terminal group includes a plurality of board terminals (eight board terminals 51 to 58 in the illustrated form) to which the connector 41 is attached. The connector 41 is an example of a first connector. The plurality of connector terminals provided on the connector 41 are respectively connected to corresponding board terminals among the plurality of board terminals included in the first board terminal group. The second board terminal group includes a plurality of board terminals (eight board terminals 61 to 68 in the illustrated form) to which the connector 42 is attached. The connector 42 is an example of a second connector. The plurality of connector terminals provided on the connector 42 are respectively connected to corresponding board terminals among the plurality of board terminals included in the second board terminal group.

  For example, the plurality of substrate terminals are through holes formed in the substrate. A plurality of connector terminals (for example, connector lead terminals) provided on the connector are respectively inserted into corresponding through holes and soldered. Thereby, each of the plurality of connector terminals is connected to the corresponding board terminal.

  The connector 41 is not mounted on the board 40A when the board 40A is mounted on a retractor installed on the left side of the vehicle, and is mounted on the board 40A when the board 40A is mounted on a retractor installed on the right side of the vehicle. . On the other hand, the connector 42 is not mounted on the board 40A when the board 40A is mounted on the retractor installed on the right side of the vehicle, and is mounted on the board 40A when the board 40A is mounted on the retractor installed on the left side of the vehicle. Is done. That is, when the board 40A is mounted on a retractor installed on the right side of the vehicle, the connector 42 is not attached to the second board terminal group, but the connector 41 is attached to the first board terminal group. On the other hand, when the board 40A is mounted on a retractor installed on the left side of the vehicle, the connector 41 is not attached to the first board terminal group, but the connector 42 is attached to the second board terminal group.

  When the connector 41 is attached to the first board terminal group, the first board terminal group is arranged so that the insertion port of the connector 41 faces the vehicle inner side with the retractor installed on the right side of the vehicle. On the other hand, when the connector 42 is attached to the second board terminal group, the second board terminal group is arranged so that the insertion port of the connector 42 faces the vehicle inner side with the retractor installed on the left side of the vehicle. Yes.

  FIG. 7 shows an example of a state in which the connector insertion port faces the vehicle inner side with the retractor installed on the right side of the vehicle. FIG. 7 shows the retractor 103R installed on the right side of the vehicle from the viewpoint from the inside of the vehicle. On the other hand, FIG. 8 shows an example of a state in which the insertion port of the connector faces the vehicle inner side with the retractor installed on the left side of the vehicle. FIG. 8 shows the retractor 103L installed on the left side of the vehicle from the viewpoint from the inside of the vehicle.

  For example, as shown in FIG. 7, the vehicle right side retractor 103 </ b> R is installed on the right pillar provided on the right side of the vehicle. The retractor 103R is disposed in the installation space sandwiched between the wall surface 9RF on the vehicle front side and the wall surface 9RR on the vehicle rear side in the right pillar. On the other hand, as shown in FIG. 8, the retractor 103L for the left side of the vehicle is installed on the left pillar provided on the left side of the vehicle. In the left pillar, the retractor 103L is disposed in an installation space sandwiched between a wall surface 9LF on the front side of the vehicle and a wall surface 9LR on the rear side of the vehicle.

  The position and shape of the installation space where the retractor is installed in the vehicle are substantially symmetrical between the vehicle right side shown in FIG. 7 and the vehicle left side shown in FIG. However, the installation space may not be symmetrical with respect to the center line 116.

  For example, the center line 116 that passes through the retracted position of the seat belt from the retractor is aligned in the vehicle front-rear direction on the right side of the vehicle shown in FIG. 7 and the left side of the vehicle shown in FIG. However, in the installation space on the right side of the vehicle in FIG. 7, the shortest distance D1 in the direction of the rotation axis 117 between the center line 116 and the vehicle front wall 9RF is between the center line 116 and the vehicle rear wall 9RR. Unlike the shortest distance D2 in the direction of the rotation axis 117, D1 is shorter than D2. Similarly, in the installation space on the left side of the vehicle in FIG. 8, the shortest distance D1 in the direction of the rotation axis 117 between the center line 116 and the vehicle front wall surface 9LF is between the center line 116 and the vehicle rear wall surface 9LR. Unlike the shortest distance D2 in the direction of the rotation axis 117, D1 is shorter than D2.

  Therefore, in the retractor 103R on the right side of the vehicle, the spring mechanism 15, the motor 24, the board 40, and the connector 41 are disposed on the vehicle rear side with respect to the center line 116, and the lock mechanism 14 is disposed on the vehicle front side with respect to the center line 116. ing. Thereby, the unit including the spring mechanism 15, the motor 24, the substrate 40, and the connector 41 can be positioned in a relatively wide installation space. Similarly, in the retractor 103L on the left side of the vehicle, the spring mechanism 15, the motor 24, the board 40, and the connector 41 are disposed on the vehicle rear side with respect to the center line 116, and the lock mechanism 14 is disposed on the vehicle front side with respect to the center line 116. Has been. Thereby, the unit including the spring mechanism 15, the motor 24, the substrate 40, and the connector 41 can be positioned in a relatively wide installation space.

  As described above, in order to prevent the position of the seat belt from being retracted from the vehicle right and left sides of the vehicle in the vehicle front-rear direction, the retractor configuration may be different between the right side and the left side of the vehicle.

  In this embodiment, as shown in FIG. 6, the substrate 40 </ b> A includes a first substrate terminal group connected to the drive control circuit 43 and a second substrate terminal group connected to the drive control circuit 43. Are formed in advance. When the connector 41 is attached to the first board terminal group, the first board terminal group is arranged so that the insertion port of the connector 41 faces the vehicle inner side with the retractor installed on the right side of the vehicle. Yes. On the other hand, when the connector 42 is attached to the second board terminal group, the second board terminal group is arranged so that the insertion port of the connector 42 faces the vehicle inner side with the retractor installed on the left side of the vehicle. Yes.

  Therefore, when the board 40A is mounted on the retractor 103R installed on the right side of the vehicle (FIG. 7), the connector 41 is attached to the first board terminal group from the second board surface 45 side, whereby the connector 41 is inserted. 41a can be directed to the inside of the vehicle. By directing the insertion port 41a of the connector 41 toward the inside of the vehicle, the work of connecting the vehicle-side connector 8R (see FIG. 2) to the connector 41 is facilitated.

  On the other hand, when the board 40A is mounted on the retractor 103L installed on the left side of the vehicle (FIG. 8), the connector 42 is attached to the second board terminal group from the second board surface 45 side, thereby inserting the connector 42 into the connector 42L. 42a can be directed to the inside of the vehicle. By directing the insertion port 42a of the connector 42 toward the inside of the vehicle, the work of connecting the vehicle-side connector 8L (see FIG. 2) to the connector 42 is facilitated.

  Therefore, since the common substrate 40A can be used for both the retractor 103R installed on the right side of the vehicle and the retractor 103L installed on the left side of the vehicle, the manufacturing cost of the substrate 40A and consequently the manufacturing cost of the retractors 103R, 103L can be reduced. it can.

  In FIG. 6, the substrate 40 </ b> A has a plurality of wirings (eight wirings 71 to 78 in the illustrated form) connected to the drive control circuit 43.

  The substrate terminals 51 and 61 are power supply terminals VB connected to each other by a wiring 71, and are connected to a power supply circuit in the drive control circuit 43 through the wiring 71. The substrate terminals 52 and 62 are ground terminals GND connected to each other by the wiring 72, and are connected to the ground portion in the drive control circuit 43 through the wiring 72.

  When the connector 41 is mounted, the power supply circuit generates the internal power supply voltage based on the power supply voltage input from the vehicle side connector 8R via the board terminal 51 because the vehicle side connector 8R is coupled to the connector 41. it can. Alternatively, when the connector 42 is mounted, the vehicle-side connector 8L is connected to the connector 42, so that the internal power supply voltage is based on the power supply voltage input from the vehicle-side connector 8L via the board terminal 61. Can be generated.

  The substrate terminals 53 and 63 are communication terminals CAN + connected to each other by a wiring 73 and are connected to a communication circuit in the drive control circuit 43 via the wiring 73. The substrate terminals 54 and 64 are communication terminals CAN− connected to each other by a wiring 74, and are connected to a communication circuit in the drive control circuit 43 through the wiring 74. CAN (Controller Area Network) communication is an example of a communication standard.

  When the connector 41 is mounted on the communication circuit, the vehicle-side connector 8R is connected to the connector 41, so that predetermined information can be transmitted and received via the board terminals 53 and 54. Alternatively, when the connector 42 is mounted on the communication circuit, the vehicle-side connector 8L is connected to the connector 42, so that predetermined information can be transmitted and received via the board terminals 63 and 64. For example, the communication circuit can receive information representing the state of the vehicle (for example, information on the presence / absence of an occupant on the seat) from the outside of the retractor, and can transmit information held by the retractor to the outside of the retractor.

  The substrate terminals 55 and 65 are buckle signal input terminals BUKL connected to each other by a wiring 75, and are connected to a buckle signal detection circuit in the drive control circuit 43 through the wiring 75.

  In the buckle signal detection circuit, when the connector 41 is mounted, the vehicle-side connector 8R is connected to the connector 41. Therefore, based on the buckle signal input via the board terminal 55, the buckle and tongue on the vehicle right-side seat Can be obtained. Alternatively, in the buckle signal detection circuit, when the connector 42 is mounted, the vehicle-side connector 8L is coupled to the connector 42, so that the buckle in the seat on the left side of the vehicle is based on the buckle signal input via the board terminal 65. It is possible to obtain information indicating the connection state between the tang and the tongue.

  The board terminals 56 and 66 are courtesy signal input terminals DOR connected to each other by a wiring 76, and are connected to the courtesy signal detection circuit in the drive control circuit 43 through the wiring 76.

  In the courtesy signal detection circuit, when the connector 41 is mounted, the vehicle-side connector 8R is connected to the connector 41, so the open / close state of the door on the right side of the vehicle is determined based on the courtesy signal input via the board terminal 56. The information to represent can be acquired. Alternatively, in the courtesy signal detection circuit, when the connector 42 is mounted, the vehicle-side connector 8L is connected to the connector 42, so that the door on the left side of the vehicle is opened and closed based on the courtesy signal input via the board terminal 66. Information indicating the state can be acquired.

  The substrate terminals 57 and 67 are motor drive terminals MOT + connected to each other by wiring 77, and are connected to the motor drive unit in the drive control circuit 43 through the wiring 77. The substrate terminals 58 and 68 are motor drive terminals MOT− connected to each other by a wiring 78, and are connected to the motor drive circuit in the drive control circuit 43 through the wiring 78.

  Since the motor 24 is connected to the connector 41 when the connector 41 is mounted, the motor driving circuit can supply a driving current for driving the motor 24 to the motor 24 via the board terminals 57 and 58. Or, since the motor 24 is connected to the connector 42 when the connector 42 is mounted, the motor driving circuit can supply the motor 24 with a driving current for driving the motor 24 via the board terminals 67 and 68.

  The number of connectors 41 is not limited to one and may be plural. For example, vehicle body side connectors are attached to the board terminals 51 to 56, and motor side connection connectors are attached to the board terminals 57 and 58. Similarly, the number of connectors 42 is not limited to one and may be plural. For example, vehicle body side connectors are attached to the board terminals 61 to 66, and motor side connection connectors are attached to the board terminals 67 and 68. A vehicle side connector routed from the vehicle interior side is connected to the vehicle body side connection connector, and a motor side connector routed from the motor 24 is connected to the motor side connection connector.

  The board terminals 51 to 56 are each provided with a 6-pole input connector (vehicle body side connector), and the board terminals 67 and 68 are each provided with a 2-pole output connector (motor side connection connector). Also good. In this case, neither the board terminals 57 and 58 nor the board terminals 61 to 66 are attached with connectors.

  It is preferable to insulate a substrate terminal to which a connector is not attached (an unused substrate terminal) by coating or potting.

  The first board terminal group and the second board terminal group are connected to a plurality of wirings 71 to 78 in the same arrangement. The first board terminal group includes power supply terminal VB, ground terminal GND, communication terminal CAN +, communication terminal CAN-, buckle signal input terminal BUKL, courtesy signal input terminal DOR, motor drive terminal MOT +, and motor drive terminal MOT-. Are arranged in the first arrangement direction 47. The second board terminal group includes power supply terminal VB, ground terminal GND, communication terminal CAN +, communication terminal CAN-, buckle signal input terminal BUKL, courtesy signal input terminal DOR, motor drive terminal MOT +, and motor drive terminal MOT-. Are arranged in the second arrangement direction 48. That is, the second board terminal group is arranged in the second arrangement direction 48 in the same order as the first board terminal group. The directions in which the first board terminal group and the second board terminal group are arranged in the same arrangement are opposite to each other. That is, the second arrangement direction 48 is opposite to the first arrangement direction 47.

  Thus, in the case of FIG. 6, the second board terminal group is arranged in the second arrangement direction 48 in the same order as the first board terminal group, and the second arrangement direction 48 is The direction is opposite to the first arrangement direction 47. Thereby, the terminal arrangement of the first mating connector coupled to the connector 41 and the terminal arrangement of the second mating connector coupled to the connector 42 can be made the same. That is, connectors having the same terminal arrangement can be used for both the first mating connector and the second mating connector.

  FIG. 9 is a circuit diagram schematically illustrating a second configuration example of the substrate. A substrate 40 </ b> B shown in FIG. 9 is an example of the substrate 40. Description of the same configuration and effects as those of the above-described configuration example in the second configuration example is omitted or simplified by using the above description.

  Similar to the first configuration example, when the board 40B is mounted on the retractor installed on the right side of the vehicle, the connector 42 is not attached to the second board terminal group, but the connector 41 is attached to the first board terminal group. It is attached. On the other hand, when the board 40B is mounted on a retractor installed on the left side of the vehicle, the connector 41 is not attached to the first board terminal group, but the connector 42 is attached to the second board terminal group.

  The substrate terminals 51 and 68 are power supply terminals VB connected to each other by a wiring 81, and are connected to a power supply circuit in the drive control circuit 43 through the wiring 81. The substrate terminals 52 and 67 are ground terminals GND connected to each other by the wiring 82, and are connected to the ground portion in the drive control circuit 43 through the wiring 82.

  The substrate terminals 53 and 66 are communication terminals CAN + connected to each other by a wiring 83 and are connected to a communication circuit in the drive control circuit 43 via the wiring 83. The substrate terminals 54 and 65 are communication terminals CAN− connected to each other by a wiring 84, and are connected to a communication circuit in the drive control circuit 43 through the wiring 84.

  The substrate terminals 55 and 64 are buckle signal input terminals BUKL connected to each other by a wiring 85, and are connected to a buckle signal detection circuit in the drive control circuit 43 through the wiring 85.

  The board terminals 56 and 63 are courtesy signal input terminals DOR connected to each other by a wiring 86, and are connected to the courtesy signal detection circuit in the drive control circuit 43 through the wiring 86.

  The substrate terminals 57 and 62 are motor drive terminals MOT + connected to each other by a wiring 87, and are connected to a motor drive unit in the drive control circuit 43 through the wiring 87. The substrate terminals 58 and 61 are motor drive terminals MOT− connected to each other by a wiring 88, and are connected to the motor drive circuit in the drive control circuit 43 through the wiring 88.

  The number of connectors 41 is not limited to one and may be plural. For example, vehicle body side connectors are attached to the board terminals 51 to 56, and motor side connection connectors are attached to the board terminals 57 and 58. Similarly, the number of connectors 42 is not limited to one and may be plural. For example, vehicle body side connectors are attached to the board terminals 63 to 68, and motor side connection connectors are attached to the board terminals 61 and 62. A vehicle side connector routed from the vehicle interior side is connected to the vehicle body side connection connector, and a motor side connector routed from the motor 24 is connected to the motor side connection connector.

  Further, a 6-pole input connector (vehicle body side connector) is attached to the board terminals 51 to 56, and a 2-pole output connector (motor side connection connector) is attached to the board terminals 61 and 62. Also good. In this case, neither the board terminals 57 and 58 nor the board terminals 63 to 68 are attached with connectors.

  It is preferable to insulate a substrate terminal to which a connector is not attached (an unused substrate terminal) by coating or potting.

  The first board terminal group and the second board terminal group are connected to a plurality of wirings 81 to 88 in the same arrangement. The second board terminal group is arranged in the third arrangement direction 49 in the same order as the first board terminal group. The directions in which the first board terminal group and the second board terminal group are arranged in the same arrangement are the same directions. That is, the third arrangement direction 49 is the same direction as the first arrangement direction 47.

  Even in the arrangement as shown in FIG. 9, the same substrate 40B can be used for both the retractor 103R installed on the right side of the vehicle and the retractor 103L installed on the left side of the vehicle, as in the first configuration example (FIG. 6). . Therefore, it is possible to reduce the manufacturing cost of the substrate 40B and consequently the manufacturing costs of the retractors 103R and 103L.

  10 and 11 are circuit diagrams schematically showing a third configuration example of the substrate. A substrate 40 </ b> C shown in FIGS. 10 and 11 is an example of the substrate 40. Description of the same configuration and effects as those of the above-described configuration example in the third configuration example is omitted or simplified by using the above description.

  FIG. 10 shows a circuit diagram when the board 40C is mounted on a retractor on the right side of the vehicle, and FIG. 11 shows a circuit diagram when the board 40C is mounted on a retractor on the left side of the vehicle.

  The board 40 </ b> C includes a first board terminal group connected to the drive control circuit 43 and a second board terminal group connected to the drive control circuit 43.

  The first board terminal group includes a plurality of board terminals (two board terminals 151 and 152 in the illustrated form) to which the connector 141 is attached. The plurality of connector terminals provided on the connector 141 are respectively connected to corresponding board terminals among the plurality of board terminals included in the first board terminal group. The second board terminal group includes a plurality of board terminals (two board terminals 161 and 162 in the illustrated form) to which the connector 142 is attached. The plurality of connector terminals provided on the connector 142 are respectively connected to corresponding board terminals among the plurality of board terminals included in the second board terminal group.

  In the third configuration example, when the board 40C is mounted on a retractor installed on the right side of the vehicle, the connector 141 is attached to the first board terminal group, and the connector 142 is also attached to the second board terminal group. When the board 40C is mounted on a retractor installed on the left side of the vehicle, the connector 141 is attached to the first board terminal group, and the connector 142 is also attached to the second board terminal group.

  When the connector 141 is attached to the first board terminal group, the first board terminal group is arranged so that the insertion port of the connector 141 faces the vehicle inner side with the retractor installed on the right side of the vehicle. On the other hand, when the connector 142 is attached to the second board terminal group, the second board terminal group is arranged so that the insertion port of the connector 142 faces the vehicle inner side with the retractor installed on the left side of the vehicle. Yes.

  Of the connector 141 attached to the first board terminal group and the connector 142 attached to the second board terminal group, the connector whose insertion port faces the vehicle interior side is a vehicle side connector routed from the vehicle interior side. It is configured to be connectable. On the other hand, the connector whose insertion port faces the vehicle exterior is configured to be connectable to a motor-side connector routed from the motor 24.

  For example, when the board 40C is mounted on a retractor installed on the right side of the vehicle (FIG. 10), the connector 141 attached to the first board terminal group is a vehicle-side connector 8R (FIG. 2) routed from the vehicle interior side. Link). The connector 142 attached to the second board terminal group is connected to the motor side connector 140 routed from the motor 24. The insertion port of the connector 142 is directed to the motor 24 side, for example.

  On the other hand, when the board 40C is mounted on the retractor installed on the left side of the vehicle (FIG. 11), the connector 141 attached to the first board terminal group is connected to the motor-side connector 140 routed from the motor 24. The The insertion port of the connector 141 is directed to the motor 24 side, for example. And the connector 142 attached to the 2nd board | substrate terminal group is connected with the vehicle side connector 8L (refer FIG. 2) routed from the vehicle inner side.

  The substrate 40 </ b> C has a plurality of wirings (four wirings 91 to 94 in the illustrated example) connected to the drive control circuit 43.

  The first board terminal group includes a board terminal 151 that is an example of a first board terminal, and the second board terminal group includes a board terminal 161 that is an example of a second board terminal. The substrate 40C includes jumper elements 157 and 167. The jumper element 157 is an example of a first connection switching unit, and connects the substrate terminal 151 to one of the wiring 91 and the wiring 92. The jumper element 167 is an example of a second connection switching unit, and connects the board terminal 161 to one of the wiring 91 and the wiring 92. The wiring 91 is an example of a first wiring, and the wiring 92 is an example of a second wiring.

  When the board 40C is mounted on the retractor installed on the right side of the vehicle (FIG. 10), the board terminal 151 and the end 153 of the wiring 91 are connected by the jumper element 157, and the board terminal 161 and the end 164 of the wiring 92 are connected. Are connected by a jumper element 167. On the other hand, when the board 40C is mounted on a retractor installed on the left side of the vehicle (FIG. 11), the board terminal 151 and the end 154 of the wiring 92 are connected by a jumper element 157, and the board terminal 161 and the end of the wiring 91 are connected. 163 is connected by a jumper element 167.

  Therefore, when the board 40C is mounted on the retractor installed on the right side of the vehicle (FIG. 10), the board terminal 151 can be used as the power supply terminal VB, and the board terminal 161 can be used as the motor drive terminal MOT +. On the other hand, when the board 40C is mounted on a retractor installed on the left side of the vehicle (FIG. 11), the board terminal 151 can be used as the motor drive terminal MOT +, and the board terminal 161 can be used as the power supply terminal VB.

  Similarly, the first board terminal group includes a board terminal 152 that is an example of a third board terminal, and the second board terminal group includes a board terminal 162 that is an example of a fourth board terminal. The substrate 40C has jumper elements 158 and 168. The jumper element 158 is an example of a third connection switching unit, and connects the board terminal 152 to either the wiring 93 or the wiring 94. The jumper element 168 is an example of a fourth connection switching unit, and connects the substrate terminal 162 to one of the wiring 93 and the wiring 94. The wiring 93 is an example of a third wiring, and the wiring 94 is an example of a fourth wiring.

  When the board 40C is mounted on the retractor installed on the right side of the vehicle (FIG. 10), the board terminal 152 and the end 155 of the wiring 93 are connected by the jumper element 158, and the board terminal 162 and the end 166 of the wiring 94 are connected. Are connected by a jumper element 168. On the other hand, when the board 40C is mounted on a retractor installed on the left side of the vehicle (FIG. 11), the board terminal 152 and the end 156 of the wiring 94 are connected by a jumper element 158, and the board terminal 162 and the end of the wiring 93 are connected. 165 is connected with a jumper element 168.

  Therefore, when the board 40C is mounted on a retractor installed on the right side of the vehicle (FIG. 10), the board terminal 152 can be used as the ground terminal GND, and the board terminal 162 can be used as the motor drive terminal MOT−. On the other hand, when the board 40C is mounted on a retractor installed on the left side of the vehicle (FIG. 11), the board terminal 152 can be used as the motor drive terminal MOT-, and the board terminal 162 can be used as the ground terminal GND.

  Therefore, the common board 40C can be used for both the retractor 103R installed on the right side of the vehicle and the retractor 103L installed on the left side of the vehicle. Therefore, it is possible to reduce the manufacturing cost of the substrate 40C and consequently the manufacturing costs of the retractors 103R and 103L.

  As mentioned above, although the seatbelt retractor was demonstrated by embodiment, this invention is not limited to the said embodiment. Various modifications and improvements such as combinations and substitutions with some or all of the other embodiments are possible within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Spool 3 Retractor 4 Board | substrate 5 Connector 7,117 Rotating shaft 14 Lock mechanism 15 Spring mechanism 16 Retainer 17 Frame 18 Board case 20 Spool 24 Motor 26 Power transmission mechanism 40, 40A, 40B, 40C Board | substrate 41, 42, 141 142 Connector 41a, 42a Slot 140 Motor side connector

Claims (7)

A spool that winds up the seat belt;
A motor for rotating the spool;
A drive control circuit for controlling the drive of the motor;
A seat belt retractor comprising a substrate on which the drive control circuit is mounted,
The board includes a first board terminal group connected to the drive control circuit, and a second board terminal group connected to the drive control circuit,
When the first connector is attached to the first board terminal group, the first connector is arranged so that the insertion port of the first connector faces the vehicle inner side in a state where the seat belt retractor is installed on the right side of the vehicle. The board terminal group of
When the second connector is attached to the second board terminal group, the second connector is arranged so that the insertion port of the second connector faces the vehicle inner side in a state where the seat belt retractor is installed on the left side of the vehicle. The board terminal group of the seat belt retractor is arranged. The substrate has a plurality of wirings connected to the drive control circuit,
The seat belt retractor according to claim 1, wherein the first board terminal group and the second board terminal group are connected to the plurality of wires in the same arrangement.   The seat belt retractor according to claim 2, wherein directions in which the first board terminal group and the second board terminal group are arranged in the same arrangement are opposite to each other. The first board terminal group includes a first board terminal,
The second board terminal group includes a second board terminal,
The substrate includes a first wiring connected to the drive control circuit, a second wiring connected to the drive control circuit, and the first substrate terminal serving as the first wiring and the second wiring. And a second connection switching unit for connecting the second board terminal to either the first wiring or the second wiring. The seat belt retractor according to claim 1, comprising:   Of the first connector attached to the first board terminal group and the second connector attached to the second board terminal group, the connector with the insertion opening facing the vehicle interior is from the vehicle interior side. The connector according to any one of claims 1 to 4, wherein the connector is configured to be connectable to the wired vehicle-side connector, and the connector having the insertion port facing outward is configured to be connectable to the motor-side connector routed from the motor. The seat belt retractor according to one item.   The seat belt retractor according to any one of claims 1 to 5, wherein the substrate is disposed such that a normal direction of the substrate is parallel to a rotation axis of the spool. An urging mechanism for urging the spool in a winding direction of the seat belt;
The seat belt retractor according to any one of claims 1 to 6, wherein the substrate is disposed between the spool and the biasing mechanism.