JP2001090409A - Door lock timer circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly safe and highly reliable door lock timer circuit which does not change the locked state of the doors of a vehicle even when the vehicle meets with an unlikely car crash and harnesses are damaged. SOLUTION: In a door lock timer circuit in which a door locking motor 2 controls the locked state of the doors of a vehicle based on the output value of a door lock timer 1 under a prescribed running condition, the control of the circuit of the timer 1 is performed by impressing a voltage from a plus power supply input. When the doors are broken by an unlikely car crash and harnesses A wired in the doors short-circuit with the body of the vehicle, nothing happens except the blowing off of a fuse 4 before the timer 1 is affected. Therefore, not only the safety but also the reliability of the door lock timer circuit are improved, because a door lock switch 3 is not affected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for controlling the opening and closing of a door of an automobile, and more particularly to a door lock timer circuit in which a door lock state is controlled by a door lock motor based on an output value of a timer under predetermined driving conditions. About.

[0002]

2. Description of the Related Art Normally, a control unit body of a door lock timer for controlling a door lock state is disposed inside a vehicle compartment, and harnesses of switches are passed from a room through a door hinge portion at a lower portion of a pillar to a door portion. To the door lock switch. Conventionally, the input circuit of the door lock timer is generally, for example, disclosed in Japanese Patent Laid-Open No. 9-679.
As disclosed in Japanese Unexamined Patent Application Publication No. 64-64 and Japanese Unexamined Patent Application Publication No. 9-273342, an input method by ground control is adopted.

FIG. 6 illustrates an example disclosed in Japanese Patent Application Laid-Open No. Hei 9-273342, which will be briefly described. A process for detecting that a vehicle has received an impact, and a case where the impact value is equal to or more than a reference value. Processing for determining whether or not the shock value is less than or equal to the reference value, and processing for outputting an unlock signal when the shock value is equal to or less than
A process of monitoring the vibration of the vehicle by a detection signal from the vibration sensor 59 when the impact value is equal to or more than the reference value, a process of continuously outputting a door lock signal while the vibration is detected by the vibration sensor 59, A process of outputting an unlock signal when vibration is no longer detected by the vibration sensor 59 is performed. In the door lock control method, a vibration sensor 59 provided in the PDU 51 is used instead of the conventional timer or the like.
Is used to determine the time until the vehicle stops.

[0004]

In the input circuit in such a control method, the wiring portion B between the microcomputer 53 and the lock switch and the unlock switch passes from the room through the door hinge at the lower part of the pillar, and the door B is connected to the door. In the event of a side collision in the event of a side collision, the wiring harness can be pulled out by adopting a ground-controlled input method in which the common side of each switch is grounded. There is a risk that the wire portion may break or break through the grommet or the corrugated tube, and may be damaged by the rib surface of the vehicle body penetrating portion or the like, and may come into contact with the vehicle body to cause a short circuit. As a result, the unlocked state may be locked without permission, or the reverse operation may occur.

Therefore, the present invention solves the above-mentioned problems of the conventional door lock timer circuit, and may cause a change in the door lock state even if a harness is damaged due to a collision accident. It is an object of the present invention to provide a safe and reliable door lock timer circuit without any problem.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a door lock timer circuit in which a door lock state is controlled by a door lock motor based on an output value of a timer under predetermined driving conditions. It is characterized in that the control is voltage application control by positive power supply input. Further, according to the present invention, in a door lock timer circuit in which a door lock state is controlled by a door lock motor based on an output value of a timer under predetermined traveling conditions, and the circuit control of the timer is an earth control input method,
The invention is characterized in that a ground application is converted into a voltage application judgment by applying a voltage application control mechanism by a plus power supply input via a relay to the earth control input section. Further, the present invention is characterized in that a transistor is used to convert the earth judgment into the voltage application judgment instead of the relay. Further, the present invention is characterized in that a resistor, a current limiting circuit or a fuse is provided in the voltage application primary circuit. Further, the present invention is characterized in that a power supply passed through a resistor or a current limiting circuit or a fuse in the voltage application primary side circuit is also used as an input signal power supply in other various units,
These are the means for solving the problem.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of a door lock timer circuit according to the present invention. As shown in FIG.
A door lock timer circuit according to the present invention is a door lock timer circuit in which a door lock state is controlled by a door lock motor based on an output value of a timer under a predetermined traveling condition. It is characterized in that voltage application control is performed. That is, in the door lock timer 1, based on the output value of the timer under predetermined driving conditions, the door lock motor 2,
The door lock state is controlled by 2..., For example, the door lock state at a predetermined speed or more, the unlock state after a predetermined time after the traveling is stopped, or a predetermined time after the predetermined acceleration is detected and the airbag is activated. After the lapse of time, control to enter an unlocked state is performed. The door switch 3 controlled in this way is installed inside the door, and is generally operated even manually. In this embodiment, the door lock timer 1 is controlled to apply a voltage by a positive power supply input, and is connected to a positive pole of the power supply via a fuse 4.

With this configuration, even if the door is damaged due to a collision accident (particularly a side collision) and the harness A portion wired inside the door is short-circuited with the vehicle body, the door is not damaged. It is only necessary to blow the fuse 4 before the lock timer 1 is affected. For example, the door lock switch 3 at the lock position does not change at all, so that the safety is improved and the reliability is improved. It will be expensive.

FIG. 2 shows a door lock timer circuit according to a second embodiment of the present invention. According to the present embodiment, a door lock state is controlled by a door lock motor based on an output value of a timer under predetermined traveling conditions, and the circuit control of the timer 1 is a conventional ground control input type. By applying a voltage application control mechanism to the ground control input section via a positive power supply input via relays R1 and R2, the ground determination is converted into a voltage application determination.
That is, one end of the exciting coil of each of the relays R1, R2 is connected to the door lock switch 3, and the other end of the exciting coil is grounded. With this configuration, when the door lock switch 3 is pressed, for example, to the lock side, the relay R1 is turned on and the contact side is set to GND (earth).
As a result, the same circuit judgment as the lock of the conventional circuit is made,
A locking operation is performed. The same applies to unlocking.

[0010] With such a configuration, the existing control circuit can be used as it is, and the door is damaged due to a collision accident (particularly a side collision), and the harness A portion wired inside the door is damaged. Even if a short circuit occurs with the vehicle body, only the relays R1 and R2 are turned off and the state of the door lock switch 3 does not change, so that safety is improved and reliability is improved.

FIG. 3 shows a door lock timer circuit according to a third embodiment of the present invention. In the present embodiment, instead of the relay in the second embodiment, the conversion of the ground determination to the voltage application determination is performed by transistors T1 and T2.
Characterized in that it is configured to perform the following. That is, the bases of the transistors T1 and T2 are connected to the door lock switch 3 via the resistor, the collector is connected to the timer 1, and the emitter is grounded. With this configuration, the existing control circuit can be used as it is as in the above-described embodiment, and the door is damaged due to an accident (particularly a side collision), and the harness wired inside the door is damaged. Even if the class A section is short-circuited with the vehicle body, the transistor T1,
At T2, the door lock switch 3 does not change state only because it is non-conductive, so that the safety is improved and the reliability is high.

FIG. 4 shows a fourth embodiment of the door lock timer circuit according to the present invention. The present embodiment is characterized in that a resistor or a current limiting circuit or a fuse 4 is provided between the voltage application primary side circuit, that is, the door lock switch 3 and the positive pole of the power supply. A voltage application primary side circuit, that is, a resistor or a current limiting circuit or a fuse 4 between the door lock switch 3 and the positive pole of the power supply in the first to third embodiments.
Particularly, in the present embodiment, a current limiting circuit such as a fuse 4 is built in the circuit of the door lock timer 1.

[0013] With this configuration, usually,
Although one fuse in an indoor fuse box is often used in a plurality of circuits and systems, unnecessary functions can be prevented from deteriorating by providing a dedicated current limiting circuit. Further, it is not preferable from the viewpoint of safety that an excessive current continues to flow until the large-capacity fuse is blown. However, since an input circuit of a control signal of a control unit such as a door lock timer has a relatively small current, Safety when the harness is broken is improved. In addition, the wire diameter of the harness is usually set to a diameter that can withstand the current flowing through the fuse capacity of the power source. However, in the present embodiment, the harness with the minimum necessary wire diameter can be used, and the harness is narrow. This is advantageous for door harnesses where necessary parts are routed.

FIG. 5 shows a fifth embodiment of the door lock timer circuit of the present invention. The present embodiment is characterized in that a power supply through a resistor or a current limiting circuit or a fuse in the voltage application primary side circuit is also used as an input signal power supply in other various units. . That is, the current limiting function 4 is set at a position close to the power supply source, and its output is used as a power source for input signals of the door lock timer and other units. With such a configuration, by using a small-capacity power supply as a power supply for input signals of the door lock timer and various units, unnecessary routing of a current circuit is reduced, and safety is improved.

Although the embodiments of the present invention have been described above, the types of the door lock timer, the type of the door lock motor, the type of the door lock switch, the types of the relay and the transistor are included within the scope of the present invention. The type of wiring and the type of current limiting circuit such as a fuse can be selected as appropriate.

[0016]

As described above in detail, the present invention relates to a door lock timer circuit in which a door lock state is controlled by a door lock motor based on an output value of a timer under predetermined driving conditions. Since the timer circuit is controlled by applying voltage with positive power input, the door lock timer can be used even if the door is damaged due to a collision accident and the harnesses wired inside the door may short-circuit with the vehicle body. In this case, the fuse only needs to be blown in a stage before affecting the door lock, and the door lock switch is not changed at all. Therefore, safety is improved and reliability is improved.

In the door lock timer circuit, a door lock state is controlled by a door lock motor based on an output value of a timer under predetermined traveling conditions, and a circuit control of the timer is an earth control input system. If the control input unit is configured to convert the ground judgment into the voltage application judgment by applying a voltage application control mechanism by positive power input via a relay, the relay on the switching side of the door lock switch is turned on. Since the contact side is grounded and the same circuit judgment as switching of the conventional circuit is made, using the existing control circuit as it is, even if the harness etc. is short-circuited with the vehicle body due to a collision accident, the relay will be Just turning off does not cause a state change in the door lock switch, improving safety and increasing reliability. Further, when the transistor is configured to convert the ground determination to the voltage application determination in place of the relay, higher reliability can be secured.

Furthermore, if a resistor or a current limiting circuit or a fuse is provided in the voltage application primary side circuit, a harness or the like wired inside the door may be short-circuited with the vehicle body due to a collision accident. In addition, the fuse is merely blown before the door lock timer is affected, so that the door lock circuit is not damaged. By providing a dedicated current limiting circuit, unnecessary functions can be prevented from lowering. When the power supply through the resistor or the current limiting circuit or the fuse in the voltage application primary side circuit is also used as the input signal power supply in other various units, the door lock timer is provided with a small-capacity power supply. And the use as a power source for input signals of various units reduces unnecessary routing of a current circuit, thereby improving safety. As described above, according to the present invention, even if a collision accident occurs and the harnesses are damaged, the door lock timer circuit which is excellent in safety and has no risk of changing the door lock state is provided. Is provided.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a door lock timer circuit of the present invention.

FIG. 2 shows a second embodiment of the door lock timer circuit of the present invention.

FIG. 3 shows a third embodiment of the door lock timer circuit of the present invention.

FIG. 4 shows a fourth embodiment of the door lock timer circuit of the present invention.

FIG. 5 shows a fifth embodiment of the door lock timer circuit of the present invention.

FIG. 6 is a diagram showing a conventional door lock control method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 door lock timer 2 door lock motor 3 door lock switch 4 current limiting circuit (fuse, resistor, etc.) A door wiring inside harnesses R relay T transistor

Claims (5)

[Claims] 1. A door lock timer circuit in which a door lock state is controlled by a door lock motor based on an output value of a timer under predetermined traveling conditions, wherein the timer circuit control includes a voltage application control by a plus power supply input. And a door lock timer circuit. 2. The door lock timer circuit according to claim 1, wherein a door lock state is controlled by a door lock motor based on an output value of a timer under predetermined driving conditions, and a circuit control of the timer is an earth control input system. A door lock timer circuit, wherein a ground application is converted into a voltage application judgment by applying a voltage application control mechanism by a positive power supply input via a relay to a control input unit. 3. The door lock timer circuit according to claim 2, wherein a transistor is used to convert grounding judgment into voltage application judgment in place of said relay. 4. The door lock timer circuit according to claim 1, wherein a resistor, a current limiting circuit, or a fuse is provided in the voltage application primary side circuit. 5. The apparatus according to claim 4, wherein a power supply passed through a resistor or a current limiting circuit or a fuse in said voltage application primary side circuit is also used as an input signal power supply in other various units. A door lock timer circuit as described.