JP2015039901A - Heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve comfortable heating while reducing power consumption in a heating element placed in webbing.SOLUTION: A heating device 40 includes: a heating element (a heater member 310) placed in webbing 31 of a seat belt device 20 of a vehicle 10; a control part 50 capable of heating the heating element; a door opening/closing detection part 51 which detects opening/closing of a door of the vehicle; and a buckle attachment detection part 37 which detects the attachment state of the webbing. The control part 50 controls a temperature of the heating element on the basis of a detection result of the door opening/closing detection part 51 and/or a detection result of the buckle attachment detection part 37.

Description

  The present invention relates to a heating device that controls the temperature of a heating element disposed on a webbing of a seat belt device of a vehicle.

  For example, Patent Document 1 discloses a technique related to a seat belt device that can efficiently warm an occupant via webbing. According to the technique disclosed in Patent Document 1, the control unit determines which body part of the occupant and the part of the webbing are in contact with the occupant from the arrangement of the seat and the amount of the webbing pulled out, and follows the determination result. By heating the part of the webbing that contacts the predetermined part of the occupant, the heating part can be made small and the occupant can be warmed efficiently.

JP 2008-37326 A

  However, according to the technique disclosed in Patent Document 1, the heating unit 40 (FIG. 1) is disclosed as a heating element disposed on the webbing, but there is no disclosure about the timing of heating or stopping, and how to warm the webbing. Is constant and warms even when not necessary, so there is a risk that power consumption will be high. In addition, since the way of warming is determined by the pull-out amount of the webbing after the occupant is seated on the seat, for example, in winter, when wearing the webbing, the cold feeling of the synthetic fiber that is the material of the webbing makes the occupant feel cold Giving and therefore not necessarily a comfortable way to warm up.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a heating device that realizes a comfortable warming method while suppressing power consumption with respect to a heating element arranged on a webbing. To do.

  In order to solve the above problems, the present invention provides a heating element disposed on a webbing of a vehicle seat belt device, a control unit capable of heating the heating element, and door opening / closing detection for detecting opening / closing of the door of the vehicle. And a buckle mounting detection unit that detects a mounting state of the webbing, and the control unit is configured to detect the heating element based on a detection result of the door opening / closing detection unit and / or a detection result of the buckle mounting detection unit. It is a heating device characterized by controlling the temperature of.

  In the present invention, the control unit starts heating the heating element when the door opening / closing detection unit detects a change in the state of the door from the closed state to the open state.

  In the present invention, the control unit starts the heating of the heating element so that the temperature of the heating element becomes a first predetermined value, and the buckle attachment detection unit changes the state from off to on. When detected, the heating of the heating element is controlled so that the temperature of the heating element becomes a second predetermined value higher than the first predetermined value.

  In the present invention, after the first predetermined time has elapsed after the state change from off to on is detected by the buckle attachment detection unit, the control unit detects that the temperature of the heating element is the first predetermined value. The heating of the heating element is controlled to be a third predetermined value that is higher than the value and lower than the second predetermined value.

  In the present invention, the control unit detects the temperature of the heating element after the second predetermined time has elapsed after the buckle wearing detection unit detects a change in state from on to off. The heating of the heating element is controlled to be a fourth predetermined value lower than the value.

  In the present invention, the control unit detects the temperature of the heating element until the second predetermined time elapses after the buckle wearing detection unit detects a change in state from on to off. The heating of the heating element is controlled to be a predetermined value of 1.

  In the present invention, the control unit starts heating the heating element when a change in state from off to on is detected by the buckle wearing detection unit.

  In the present invention, it further includes a drive state detection unit that detects a drive state of the drive unit of the vehicle, and the control unit detects a change in the state of the vehicle drive unit from on to off in the drive state detection unit. When detected, heating of the heating element is stopped, and as long as the drive unit is in the on state, heating of the heating element is continued after a change in state from on to off is detected by the buckle mounting detection unit. It is characterized by doing.

  ADVANTAGE OF THE INVENTION According to this invention, the heating apparatus which implement | achieves the comfortable warming method can be provided, suppressing power consumption with respect to the heat generating body arrange | positioned at webbing.

It is the side view which showed the mounting state of the seatbelt apparatus which mounts the heating apparatus of embodiment of this invention. It is the front view which showed the mounting state of the seatbelt apparatus carrying the heating apparatus of embodiment of this invention. It is an internal block diagram of the lap belt of FIG. 1, FIG. It is a block diagram which shows the periphery structure of the control part of the heating apparatus of embodiment of this invention. It is a figure which shows the state transition of the temperature control by the heating apparatus of embodiment of this invention. It is a timing diagram which shows the specific example of the temperature control by the heating apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the heating apparatus of embodiment of this invention.

  Hereinafter, a heating apparatus according to an embodiment of the present invention (hereinafter simply referred to as the present embodiment) will be described in detail with reference to the drawings.

(Configuration of the embodiment)
FIG. 1 shows a seat 20 and a seat belt device 30 provided in the vehicle 10 as viewed from the side. FIG. 2 shows the seat 20 and the seat belt device 30 installed in the passenger compartment 11 as viewed from the front. The seat 20 shown in FIGS. 1 and 2 is exemplified as a driver seat where a driver Mn (occupant Mn) sits. Moreover, the seat belt apparatus 30 has illustrated the apparatus for driver | operator Mn.

  The seat 20 includes a seat cushion 21, a seat back 22, and a headrest 23. The seat belt device 30 restrains an occupant Mn seated on the seat 20 with a webbing 31 (also referred to as a seat belt), and includes a retractor 41. According to the seat belt device 30, the webbing 31 that simultaneously restrains one shoulder and waist of the occupant Mn can be wound up by the retractor 41.

  The seat belt device 30 has a three-point support structure in which the webbing 31 is supported by three anchors, that is, an upper anchor 32, a center anchor 33, and a lower anchor 34. The upper anchor 32 is provided on the upper side of the side of the vehicle body 12. The center anchor 33 is provided at a lower portion on the opposite side of the seat 20 from the upper anchor 32. The lower anchor 34 is provided at the lower part on the upper anchor 32 side.

  The webbing 31 includes a shoulder belt 31a that restrains one shoulder of the occupant Mn and a lap belt 31b that restrains the waist of the occupant Mn. A tongue 35 is provided between the shoulder belt 31a and the lap belt 31b (folded portion 31c) so as to be able to pass through and move the webbing 31. The tongue 35 is configured to be detachably attached to the buckle 36 fixed to the center anchor 33 with one touch.

  The buckle 36 has a built-in buckle switch 37. The buckle switch 37 is configured to turn off when the tongue 35 is attached to the buckle 36 and to reverse from the off state to the on state when the tongue 35 is released from the buckle 36. That is, the buckle switch 37 emits an off (off) signal when the webbing 31 is attached, and emits an on (on) signal when the webbing 31 is not attached (disengaged). Such a buckle switch 37 corresponds to a buckle attachment detection unit that detects the attachment state of the belt 31.

  As shown in FIG. 2, the center anchor 33 is connected to the belt retracting portion 38. The belt retracting portion 38 is attached to the vehicle body 12, and retracts the center anchor 33 toward the floor 12 a of the vehicle body 12 and also returns it so as to return to the original state, and is driven by the actuator 39. Is done. Such a belt retracting portion 38 is constituted by, for example, a rack and pinion mechanism, and when the pinion is rotationally driven by the actuator 39, the center anchor 33 connected to the rack can be slid in the vertical direction of the vehicle body. The actuator 39 is made of an electric motor, for example.

  Here, the operation of the belt retracting portion 38 in a state where the tongue 35 is attached to the buckle 36 will be described. When the actuator 39 pulls in and drives the belt retracting portion 38, the belt retracting portion 38 retracts the center anchor 33 toward the floor 12a (in the direction of arrow Re). For this reason, the tongue 35 and a part 31c (folded portion 31c) of the webbing 31 are drawn to the floor 12a side. As a result, the shoulder belt 31a and the lap belt 31b are drawn to the floor 12a side. In this way, the slack of the lap belt 31b with respect to the waist of the occupant Mn (see FIG. 1) can be eliminated. Thereafter, when the actuator 39 stops, the belt retracting portion 38 maintains the stopped state. As a result, the shoulder belt 31a and the lap belt 31b maintain the retracted state.

  Thereafter, the actuator 39 drives the belt retracting portion 38 to return, so that the belt retracting portion 38 returns the center anchor 33 to the side opposite to the floor 12a (the side opposite to the arrow Re). For this reason, the tongue 35 and the folding | returning part 31c return to the original position. As a result, the shoulder belt 31a and the lap belt 31b are loosened. In this way, the slack of the lap belt 31b with respect to the waist of the occupant Mn can be provided. Thereafter, when the actuator 39 stops, the belt retracting portion 38 maintains the stopped state at the original position. As a result, the shoulder belt 31a and the lap belt 31b maintain the loosened state.

 As is clear from the above description, the belt retracting portion 38 has a portion 31c (turned back) in the reverse direction Re with respect to the direction Di in which the webbing 31 is wound by the belt reel 42 so as to restrain the occupant Mn. Part 31c).

  The controller 50 controls the operation of the retractor 41 by controlling the energization amount of the drive current supplied to the electric motor. The retractor 41 controlled by the control unit 50 is configured as an electric pretensioner for maintaining the posture of the occupant Mn. The occupant 11 who gets on the seat 20 is protected and restrained by the webbing 31 when the vehicle is in an emergency or when the running state is unstable, and changes in posture and position are suppressed, and the desired safe state is maintained. Further, the controller 50 also controls the temperature of the heater member 310 accommodated in a position corresponding to the abdomen of the occupant of the lap belt 31b when the webbing is attached.

  As shown in FIG. 3, the lap belt 31b has a double structure in which synthetic fibers are stitched or bonded, and a flexible film-like heater member 310 is embedded therein as a heating element. . As a result, the wearability is not changed from the conventional lap belt. One end of the lap belt 31b is fixed to a vehicle body portion at the lower part of the passenger compartment by a lower anne 34.

  FIG. 4 shows a configuration around the control unit 50 as the heating device 40 of the present embodiment. The heating device 40 of the present embodiment has a control unit 50 as a control center, a heater member 310 accommodated in a webbing 31 (lap belt 31b) that is a heating element, a buckle attachment detection unit 37 (buckle switch), and a door opening / closing. A detection unit 51 and a drive state detection unit 52 are included.

  As shown in FIG. 4, a door open / close detection unit 51, a drive state detection unit 52, and a buckle attachment detection unit 37 are connected to the control unit 50 via a CAN (Controller Area Network) bus 53. The door opening / closing detection unit 51 indicates an on / off (open / close) state of a door switch installed in the vicinity of the door of the vehicle, the driving state detection unit 52 indicates an on / off state of an ignition switch, and the buckle mounting detection unit 37 The wearing state of the buckle 36 (on / off of the buckle switch 37) is detected, and the control unit 50 recognizes this as a state change (event).

  The control unit 50 controls the temperature of the heater member 310 that is a heating element based on the detection result of the door opening / closing detection unit 51 and / or the detection result of the buckle attachment detection unit 37. FIG. 5 shows a state transition related to the temperature control of the control unit 50, and FIG. 6 shows a specific example of the temperature control in a timing diagram.

  When the door opening / closing detection unit 51 detects a state change (event) from closing to opening of the door, the control unit 50 starts heating the heater member 310. At this time, the control unit 50 starts heating the heater member 310 so that the temperature of the heater member 310 becomes a first predetermined value (for example, a low temperature operation of 20 ° C. in FIG. 6). When a change in state from OFF to ON is detected (event), the temperature of the heater member 310 becomes a second predetermined value higher than the first predetermined value (for example, a high temperature operation at 60 ° C. in FIG. 6). Thus, the heating of the heater member 310 is controlled.

  After the first predetermined time (for example, 500 [ms]) elapses after the buckle attachment detection unit 37 detects the state change (event) from off to on, the control unit 50 determines the temperature of the heater member 310 to The heating of the heater member 310 is controlled to be a third predetermined value that is higher than the first predetermined value and lower than the second predetermined value (for example, an intermediate temperature state of 40 ° C. in FIG. 6).

  After the second predetermined time (for example, 5 [s]) elapses after the buckle attachment detection unit 37 detects the change in the state from on to off, the control unit 50 determines that the temperature of the heater member 310 is the first. The heating of the heater member 310 is controlled so as to be a fourth predetermined value lower than the predetermined value (for example, an ultra-low temperature operation at 10 ° C. in FIG. 4).

  The controller 50 detects that the temperature of the heater member 310 is the first predetermined value until the second predetermined time elapses after the buckle attachment detection unit 37 detects a change in state (event) from on to off. The heating of the heater member 310 is controlled so that

  The control unit 50 starts heating the heater member 310 when the buckle wearing detection unit 37 detects a state change (event) from off to on.

  When the drive state detection unit 52 detects a state change (event) from ON to OFF of the drive unit (ignition switch not shown) of the vehicle 10, the control unit 50 stops heating the heater member 310. As long as is in the on state, after the state change from on to off is detected by the buckle mounting detector 37, heating of the heater member 310 is continued.

(Operation of the embodiment)
Hereinafter, operation | movement of the heating apparatus 40 of this embodiment is demonstrated in detail, referring the flowchart of FIG.

  The control unit 50 constantly monitors the outputs of the buckle attachment detection unit 37, the door opening / closing detection unit 51, and the drive state detection unit 52 via the CAN bus 53 at regular intervals. For this reason, when the control unit 50 detects an event in which the door changes from the closed state to the open state by the output of the door opening / closing detection unit 51 (step S101 “YES”), the heater member 310 accommodated in the lap belt 31b is heated. To start. At this time, the control unit 50 performs the low temperature operation control so that the temperature of the heater member 310 accommodated in the lap belt 31b is about 20 ° C., for example, as shown in FIG. 6 (step S102).

  As described above, the controller 50 starts heating the heater member 310 when the door opening / closing detection unit 51 detects a change in the state of the door from closing to opening. Can warm up. Therefore, since a cold feeling or the like is not given to the occupant when the lap belt 31b is worn, comfort is improved.

  Next, when the control unit 50 detects an event in which the output of the buckle attachment detection unit 37 changes from off to on (step S103 “YES”), the temperature of the heater member 310 housed in the lap belt 31b is 20. For example, the heating control is performed by a rapid high-temperature operation so as to reach a high temperature of about 60 ° C. in FIG. 6, for example (step S104). When the state continues for 500 [ms] (step S105 “YES”), the controller 50 starts from a high temperature state where the temperature of the heater member 310 of the lap belt 31b is about 60 ° C., for example, 40 ° C. in FIG. Heating control of the heater member 310 is performed so as to reach an intermediate temperature state (step S106).

  In this way, the control unit 50 starts heating so that the temperature of the heater member 310 that is a heating element becomes a first predetermined value (for example, a low temperature operation of 20 ° C.). When a change in state to ON is detected, heating control is performed so that the temperature of the heater member 310 becomes a second predetermined value (for example, a high-temperature operation at 60 ° C.) higher than the first predetermined value. For this reason, since the lap belt 31b is sufficiently warmed by rapid heating when the webbing 31 is mounted, the comfort is increased particularly in winter. In addition, after the first predetermined time (for example, 500 [ms]) has elapsed after the state change from the off state to the on state is detected by the buckle attachment detection unit 37, the control unit 50 determines that the temperature of the heater member 310 is Compared to the case where the high temperature operation is continued by controlling the heating so that the third predetermined value is higher than the first predetermined value and lower than the second predetermined value (for example, the medium temperature operation at 40 ° C.). Power consumption can be suppressed, and as a result, both comfort and power saving can be achieved.

  Subsequently, when the control unit 50 detects an event in which the output of the buckle mounting detection unit 37 changes from on to off (step S107 “YES”), the temperature of the heater member 310 housed inside the lap belt 31b is determined. For example, as shown in FIG. 6, the heating control by the low temperature operation is performed so as to change from the middle temperature state of 40 ° C. to the low temperature state of 20 ° C. (step S108). When the low temperature state continues for about 5 [s] (step S109 “YES”), the control unit 50 lowers the temperature of the heater member 310, for example, an ultra low temperature state of 10 ° C. in FIG. Heating control is performed (step S110).

  As described above, the control unit 50 detects the heater member until the second predetermined time (for example, 5 [s]) elapses after the buckle wearing detection unit 37 detects the state change from on to off. Heating is controlled so that the temperature of 310 becomes the first predetermined value. For this reason, since the heater member 310 is switched from the intermediate temperature operation to the low temperature operation when the occupant removes the webbing 31 and goes out of the passenger compartment, it is possible to suppress useless power and contribute to power saving. In addition, after the second predetermined time has elapsed since switching to the low temperature operation, the control unit 50 sets the temperature of the heater member 310 to a fourth predetermined value lower than the first predetermined value (for example, about 10 ° C.). Control to achieve ultra-low temperature operation. Thus, further power saving can be achieved by subdividing the low temperature operation and controlling each of them.

  Next, when the driving state detection unit 52 detects a state change (event) from ON to OFF of the driving unit (ignition switch) of the vehicle 1 (step S111 “YES”), the control unit 50 detects the lap belt 31b. Is stopped (step S112). However, as long as the engine is operating (step S111 “NO”), the control unit 50 continues the heating control by the low temperature operation (step S108) or the heating control by the ultra low temperature operation (step S110). Therefore, even if the driving state detection unit 52 remains on, that is, the engine is in a driving state, for example, even if the occupant goes out of the temporary compartment, the heater member 310 accommodated in the lap belt 13b operates at a low temperature. Alternatively, the temperature control by the super-constant temperature operation is continued, so that the comfort when the occupant returns to the passenger compartment can be continued.

  Although not shown in the flowchart of FIG. 7, the control unit 50 may start heating the heater member 310 when the buckle attachment detection unit 37 detects a state change from off to on. In this case, since the heater member 310 accommodated in the lap belt 31b is heated only after the occupant wears the webbing 31, the power consumption can be suppressed compared to the case where heating is started with the door opened. it can.

(Effect of embodiment)
As described above, according to the heating device 40 of the present embodiment, the control unit 50 controls the webbing 31 that is a heating element based on the detection result of the door opening / closing detection unit 51 and / or the detection result of the buckle attachment detection unit 37. By controlling the temperature of the heater member 310 accommodated in the lap belt 31b, it is possible to realize a comfortable warming method for the occupant while suppressing power consumption.

  In addition, according to the heating device 40 of the present embodiment, the heater member 310 that is a heating element is accommodated in the lap belt 31b, and the heater member 310 is heated and controlled to give comfort to the occupant. The body is not limited to the heater member 310, and the accommodation form is not limited to embedded mounting, and the accommodation location is not limited to the lap belt 31b.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 30 ... Seat belt apparatus, 31 ... Webbing (31a ... Shoulder belt, 31b ... Lap belt), 36 ... Buckle, 37 ... Buckle switch (buckle mounting detection part), 40 ... Heating apparatus, 50 ... Control part, DESCRIPTION OF SYMBOLS 51 ... Door opening / closing detection part, 52 ... Drive state detection part, 53 ... CAN bus, 310 ... Heater member (heating element)

Claims (8)

A heating element disposed on a webbing of a vehicle seat belt device;
A control unit capable of heating the heating element;
A door opening / closing detection unit for detecting opening / closing of the door of the vehicle;
A buckle wearing detector for detecting the wearing state of the webbing;
With
The controller is
A heating apparatus that controls the temperature of the heating element based on a detection result of the door opening / closing detection unit and / or a detection result of the buckle mounting detection unit. The controller is
The heating device according to claim 1, wherein when the door opening / closing detection unit detects a change in the state of the door from the closed state to the open state, heating of the heating element is started. The controller is
The heating of the heating element is started so that the temperature of the heating element becomes a first predetermined value, and when the state change from OFF to ON is detected by the buckle mounting detection unit, The heating apparatus according to claim 2, wherein the heating of the heating element is controlled so that the temperature becomes a second predetermined value higher than the first predetermined value. The controller is
After the first predetermined time has elapsed since the state change from OFF to ON was detected by the buckle attachment detection unit, the temperature of the heating element is higher than the first predetermined value and the second The heating apparatus according to claim 3, wherein the heating of the heating element is controlled to be a third predetermined value lower than the predetermined value. The controller is
A fourth predetermined value in which the temperature of the heating element is lower than the first predetermined value after a second predetermined time has elapsed after the buckle wearing detection unit detects a state change from on to off. The heating apparatus according to claim 4, wherein the heating of the heating element is controlled so as to become. The controller is
The temperature of the heating element is set to the first predetermined value until the second predetermined time elapses after the buckle wearing detection unit detects a change in state from on to off. The heating apparatus according to claim 1, wherein the heating of the heating element is controlled. The controller is
The heating apparatus according to claim 1, wherein heating of the heating element is started when a state change from off to on is detected by the buckle wearing detection unit. A driving state detecting unit for detecting a driving state of the driving unit of the vehicle;
The controller is
When the driving state detection unit detects a change in the state of the driving unit of the vehicle from on to off, heating of the heating element is stopped, and as long as the driving unit is in the on state, the buckle mounting detection unit The heating device according to claim 1, wherein heating of the heating element is continued after a change in state from on to off is detected.

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