JP3974548B2 - Electric lock control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric lock control device that performs failure diagnosis of an electric lock.
[0002]
[Prior art]
Conventionally, an electric lock control device for locking / unlocking an electric lock has been provided with a position detecting means for detecting the position of a locking rod that slides between a locked position and an unlocked position. A number of position detection means are provided on the rocking rod, and it is determined whether or not the position detection means is out of order depending on whether or not all the position detection means match.
[0003]
[Patent Document 1]
JP-A-9-254266
[Problems to be solved by the invention]
However, in the above-described conventional electric lock control device, the reliability is ensured by increasing the number of position detecting means, so the number of parts is increased, resulting in an increase in the size of the entire device and an increase in manufacturing cost. .
[0005]
Therefore, an object of the present invention is to provide an electric lock control device capable of detecting a failure without increasing the size of the entire device and increasing the manufacturing cost.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 comprises a reed switch having a transfer contact made up of a common contact, a normal open contact, and a normal close contact, and a pull-up circuit made up of a pull-up resistor and a pull-up power source. And a control means for controlling a locking rod that slides between a locked position and an unlocked position, the common contact is connected to the control means, the normal / close contact is grounded, and the control means One end side of the pull-up resistor is connected between the pull-up resistor and the common contact, and a pull-up power source is connected to the other end side of the pull-up resistor. One reed switch is connected in parallel to the control means, and this reed switch closes the circuit in the reed switch when this reed switch is OFF. The lead switch is connected so as to open the circuit in the reed switch in the ON state, and the other reed switch opens the circuit in the reed switch when the reed switch is OFF, and closes the circuit in the reed switch when the reed switch is ON. It is characterized by being connected in this way.
[0007]
According to a second aspect of the present invention, in the electric lock control device according to the first aspect, the electric steering lock device is controlled by the electric lock control device, and a failure detection signal of the control means is output to the vehicle body side control device. It is characterized by that.
[0008]
【The invention's effect】
According to the first aspect of the present invention, since it is possible to determine whether or not the position detection means has failed with the two sets of position detection means, the size of the entire apparatus is increased, and the manufacturing cost is increased. Failure can be detected.
[0009]
According to the second aspect of the present invention, an effect similar to that of the first aspect can be obtained in the control device for the electric steering lock device.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An electric lock control device of an electric steering lock device as one embodiment of the present invention will be described in detail with reference to the drawings.
[0011]
1 is a front sectional view of the steering lock device of the present embodiment, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a circuit diagram of the electric lock control device of the present embodiment, and FIG. It is a logic matrix of the electric lock control device of this embodiment.
[0012]
The steering lock device 100 of the present embodiment is installed on a steering column (not shown) of a vehicle.
[0013]
As shown in FIGS. 1 and 2, the steering lock device 100 includes a lock mechanism 110 and an electric lock control device 1. The lock mechanism 110 is connected to a motor 111 that supplies a driving force, a cam mechanism 112 that is connected to a drive shaft of the motor 111, and converts rotational motion into reciprocating motion. The lock mechanism 110 is connected to the cam mechanism 112, and has an unlocking position and a locking position. It is comprised from the rocking rod 113 which slides between. Further, the lock mechanism 110 is provided with an unlock holding means 120 so that the unlocked locking rod 113 is not locked inadvertently.
[0014]
The unlocking holding means 120 includes a slider 122 in which a locking portion 123 at the tip slides in an engagement portion 121 provided on the locking rod 113 so that the locking portion 123 can be engaged and released, and a solenoid 124 that slides the slider 122 by magnetic force. Has been.
[0015]
The electric lock control device 1 includes a control means 10 and a position detection means 11. The control means 10 drives the motor 111 according to the unlocking command and the locking command issued from the occupant, and determines whether or not the locking rod 113 is held at a predetermined position from the output of the position detection means 11. When the command issued from the occupant is different from the position of the locking rod 113, and when it is determined that the position detecting means 11 is out of order, a failure detection signal is output to the vehicle body side control device (not shown). . The position detection means 11 recognizes whether the locking rod 113 is in the locked position or the unlocked position by detecting whether the slider 122 is engaged with or released from the locking rod 113.
[0016]
When the locking rod 113 is in the locked position, the leading end of the slider 122 is not engaged with the engaging portion 121 and is in contact with the side surface of the locking rod 113. Therefore, the reed switches S1 and S2 constituting the position detecting means 11 are used. Is in an OFF state. When the locking rod 113 is in the unlocked position, the tip of the slider 122 engages with the engaging portion 121. Therefore, when the slider 122 slides to the engaging position, the reed switches S1 and S2 are turned on. .
[0017]
As shown in FIG. 3, the electric lock control device 1 includes reed switches S1 and S2 having transfer contacts including common contacts 12a and 12b, normal / open contacts 13a and 13b, and normal / close contacts 14a and 14b. , Controls two sets of position detecting means 11 composed of pull-up resistors 15a, 15b and pull-up circuits 17a, 17b comprising a pull-up power supply 16, and a locking rod 113 that slides between a locked position and an unlocked position. And two sets of position detection means 11 are connected in parallel to the control means 10.
[0018]
In both reed switches S1 and S2, the common contacts 12a and 12b are connected to the terminals M1 and M2 of the control means 10, respectively, and the normal / close contacts 14a and 14b are grounded. One end side of the pull-up resistors 15a and 15b is connected between the terminals M1 and M2 and the common contacts 12a and 12b, and the pull-up power source 16 is connected to the other end side of the pull-up resistors 15a and 15b. .
[0019]
One reed switch S1 is connected so that the circuit in the reed switch is closed in the locked state (reed switch S1 is OFF) and the circuit in the reed switch is opened in the unlocked state (reed switch S1 is ON). Has been. As a result, in the normal state where there is no failure, the terminal M1 is grounded in the locked state, so that the LOW voltage is input to the control means 10, and the voltage of the pull-up power supply 16 is applied to the terminal M1 in the unlocked state. Therefore, the HI voltage is input to the control means 10.
[0020]
The other reed switch S2 is wired so that the circuit in the reed switch is opened in the locked state and the circuit in the reed switch is closed in the unlocked state. As a result, in the normal state with no failure, the voltage of the pull-up power supply 16 is applied to the terminal M2 in the locked state, so that the HI voltage is input to the control means 10, and the terminal M2 is grounded in the unlocked state. Therefore, a LOW voltage is input to the control means 10.
[0021]
A logic matrix as shown in FIG. 4 is recorded in the control means 10, and failure detection of the reed switches S 1 and S 2 is performed based on the voltage input to the terminals M 1 and M 2, and the control means 10 includes the locking rod 113. Faults are detected by detecting the voltages input to the terminals M1 and M2 before and after the operation.
[0022]
In a normal state in which the reed switches S1 and S2 are not malfunctioning, the LOW voltage is input to the terminal M1 in the locked state, the HI voltage is input to the terminal M2, and the HI voltage is input to the terminal M1 in the unlocked state. And the LOW voltage is input to the terminal M2.
[0023]
However, when the reed switch S1 is opened and cannot be closed, the HI voltage is input to the terminal M1 in the locked state, so that it is determined that there is a failure. However, in the unlocked state, the HI voltage is applied to the terminal M1 even in the normal state. Therefore, the failure cannot be detected as it is. However, since the voltage input to the terminal M1 does not change when shifting from the locked state to the unlocked state or when shifting from the unlocked state to the locked state, it is determined that the reed switch S1 has failed. The
[0024]
When the reed switch S1 is closed and cannot be opened, a voltage similar to that in the normal state is input to the terminal M1 in the locked state, so that a failure cannot be detected in this state, but the state shifts from the locked state to the unlocked state. Alternatively, when changing from the unlocked state to the locked state, the voltage input to the terminal M1 does not change, so it is determined that the reed switch S1 has failed.
[0025]
In addition, when the reed switch S2 is opened and cannot be closed, a voltage similar to that in the normal state is input to the terminal M2 in the locked state, so that a failure cannot be detected in this state, but the state shifts from the locked state to the unlocked state. When the operation is performed or when the unlocked state is shifted to the locked state, the voltage input to the terminal M2 does not change, so that it is determined that the reed switch S2 is out of order.
[0026]
When the reed switch S2 is closed and cannot be opened, a LOW voltage is input to the terminal M2 in the locked state, so it is determined that there is a failure. In the unlocked state, a LOW voltage is input to the terminal M2 even in a normal state. Therefore, the failure cannot be detected as it is. However, since the voltage input to the terminal M2 does not change when shifting from the locked state to the unlocked state or when shifting from the unlocked state to the locked state, it is determined that the reed switch S2 has failed. The
[0027]
Further, when the terminals M1 and M2 are short-circuited, the voltages input to both terminals M1 and M2 are always the same, so it is determined that a failure has occurred.
[0028]
With the above configuration, it is possible to determine whether or not the position detection means is out of order by providing the electric steering lock apparatus with the electric lock control device 1 including the control means 10 and the two sets of position detection means 11. A failure can be detected without increasing the size of the entire apparatus and increasing the manufacturing cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view taken along a center line in a longitudinal direction of a steering lock device in which an electric lock device of the present embodiment is incorporated.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a circuit diagram of the electric lock device of the present embodiment.
FIG. 4 is a logic matrix of the electric lock device of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Electric lock control apparatus 10 ... Control means 11 ... Position detection means 12a, 12b ... Common contact 13a, 13b ... Open contact 14a, 14b ... Close contact 15a, 15b ... Pull-up resistor 16 ... Pull-up power supply 17a, 17b ... Pull Up circuit 113 ... Rocking rod S1, S2 ... Reed switch

Claims (2)

A reed switch with a transfer contact consisting of a common contact, a normal open contact and a normal close contact;
A position detection means comprising a pull-up resistor and a pull-up circuit comprising a pull-up power supply;
Control means for controlling a locking rod that slides between a locked position and an unlocked position;
The common contact is connected to the control means,
The normally closed contact is grounded,
One end of the pull-up resistor is connected between the control means and the common contact,
An electric lock control device in which a pull-up power source is connected to the other end of the pull-up resistor,
Two sets of the position detection means are connected in parallel to the control means,
One reed switch is connected to close the circuit in the reed switch when this reed switch is OFF, and open the circuit in the reed switch when this reed switch is ON,
The other reed switch is connected to open the circuit in the reed switch when the reed switch is in the OFF state, and close the circuit in the reed switch when the reed switch is in the ON state. In the electric lock control device according to claim 1,
The electric steering lock device is controlled by the electric lock control device,
An electric lock control device, wherein a failure detection signal of the control means is output to a vehicle body side control device.

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