JP2659151B2 - Transmitter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitting circuit for transmitting an airborne signal to a key which can be inserted into a key cylinder, and a transmitting device provided with the power supply.

[0002]

2. Description of the Related Art Recently, for example, some automobiles are equipped with a so-called wireless door lock device. This is because when a transmission circuit and a battery as a power supply for the transmission circuit are provided at the base of an ignition key that can be inserted into the ignition key cylinder and the door key cylinder, the driver emits a radio signal by transmitting the transmission circuit. The reception signal discriminating means provided on the vehicle body decodes the radio signal, and when the radio signal is a specific signal set for the vehicle, the electric actuator is operated to automatically lock the door. Or the lock is automatically released.

[0003] Such a wireless door lock device is
The door can be automatically locked or unlocked simply by pressing the operation button to cause the transmission circuit to perform a transmission operation, which is very convenient in use.

[0004]

However, in the above configuration, when the power source of the transmission circuit is depleted and the battery is depleted, the radio signal cannot be emitted. Lock release operation cannot be performed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a transmitting device capable of performing a transmitting operation of a transmitting circuit even when the power of the transmitting circuit is exhausted and the power runs out. To be.

[0006]

According to the present invention, there is provided an oscillator having a transmitting circuit for transmitting an airborne signal to a key which can be inserted into a key cylinder, and an oscillating device having a power supply therefor. Detecting means for detecting insertion of a key; and a primary coil which is energized based on the detection of the detecting means, wherein the key generates an induced electromotive force based on a change in a current flowing through the primary coil when the key is inserted into a key cylinder. And a transmitting operation of the transmitting circuit based on an induced electromotive force generated in the secondary coil.

[0007]

When the power of the power supply is normal, an airborne signal can be generated by activating the transmission circuit. However, when the power of the power supply runs out, the transmission circuit will perform the transmission operation. In this case, an airborne signal cannot be emitted.

In such a case, the key is inserted into the key cylinder. Then, the insertion of the key is detected by the detection means on the key cylinder side, and the primary coil is energized accordingly. Based on the change in the current of the primary coil, an induced electromotive force is generated in the secondary coil on the key side, and the transmission circuit on the key side performs an emission operation using the induced electromotive force as a power supply, and emits an airborne signal. Will be able to

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a transmitting device in a wireless door lock device of an automobile will be described below with reference to the drawings.

First, in FIG. 6 showing a lock mechanism portion of a door, reference numeral 1 denotes a lock mechanism provided on a door (not shown). When a lock displacement is given, the lock mechanism 1 engages with a locking portion on the vehicle body side. Then, the door is locked in a closed state, and when a lock release displacement in the opposite direction to the lock displacement is given, the lock is released. The lock mechanism 1 can be operated both electrically and manually.

An electric operation mechanism 2 for electrically operating the lock mechanism 1 includes an electromagnet 3 for locking and an electromagnet 4 for unlocking as electric actuators. And
When the lock electromagnet 3 is energized by the door lock / unlock switch 5 shown in FIG. 7 provided on the driver's seat side door, the movable iron core (not shown) is attracted to the lock electromagnet 3 and displaced, so that the lock mechanism 1 is displaced. The door is configured to be locked in a closed state by giving a lock displacement to the door. Also,
When the unlocking electromagnet 4 is energized by the door lock / unlock switch 5, the movable iron core (not shown) is attracted to the unlocking electromagnet 4 and displaced in the opposite direction to the lock state, and the lock mechanism 1 disengages the unlocking displacement. To unlock the door.

A manual operation mechanism 6 for manually operating the lock mechanism 1 uses a key cylinder 7 provided on a door (not shown) as a manual operation source. This key cylinder 7
A rotor 9 is rotatably provided in the rotor case 8, and an ignition key 10 can be inserted into the rotor 9 from a key insertion opening 9a. The rotor 9 is rotated by a key 10 from a neutral position in a lock direction indicated by an arrow A and in a lock release direction indicated by an arrow B opposite thereto. The rotational movement of the rotor 9 in the locking direction and the unlocking direction is given to the lock mechanism 1 via the link mechanism 11 as a lock displacement and an unlock displacement.

The link mechanism 11 includes a swing arm 12 fixed to the rear end of the rotor 9 of the key cylinder 7, a swing arm 13 provided on the lock mechanism 1 side, and a link between the swing arms 12 and 13. An upper rod 14 and a lower rod 15 are provided so as to be connected. Then, when the rotor 9 is turned in the lock direction indicated by the arrow A and the turning arm 12 turns in the same direction, the upper rod 14 is moved in the pulling direction indicated by the arrow C. Also, when the rotor 9 is rotated in the unlocking direction indicated by the arrow B and the turning arm 12 turns in the same direction, the upper rod 14 is moved in the pushing direction indicated by the arrow D opposite to the arrow C. It is configured.

An inhibit mechanism 16 is provided between the upper rod 14 and the lower rod 15. The inhibit mechanism 16 transmits the displacement of the upper rod 14 in the pushing direction when the rotor 9 is rotated in the unlocking direction to the lower rod 15 or prevents the displacement from being transmitted to the lower rod 15. is there.

In FIG. 8, which shows a specific configuration of the inhibit mechanism 16, reference numeral 17 denotes a sleeve, and the upper rod 14 and the lower rod 15 are provided inside both ends of the sleeve 17.
Is slidably inserted. Large diameter portions 14a and 15a are formed at the ends of both rods 14 and 15, and large diameter portions 14a and 1a are formed.
By locking 5 a to the end of the sleeve 17, the rods 14 and 15 are configured not to come off the sleeve 17.

At the center of the sleeve 17, there is provided a biaxial motor 18 which is rotatable forward and backward as an electric actuator, and threaded rods 19 and 20 are fixed to both ends of the rotary shaft 18a. Have been. The external threads of these two threaded rods 19 and 20 are formed so that the winding directions are opposite to each other. And 22 are screwed. In addition,
The nut members 21 and 22 are protruded from the outer periphery.
By engaging the grooves 1a and 22a with the grooves 17a formed in the inner peripheral surface of the sleeve 17 so as to extend in the axial direction, the rotation is stopped.

When the motor 18 rotates in the forward direction, the nut members 21 and 22 slide in the opening directions indicated by arrows E and F, respectively. Then, as shown in FIG. 8, the two nut members 21 and 22 abut against the large-diameter portions 14a and 15a of the upper rod 14 and the lower rod 15, and press the large-diameter portions 14a and 15a against both ends of the sleeve 17, and The rod 14 and the lower rod 15 are connected.

In this connection state, the upper rod 14 is
, The displacement is transmitted to the lower rod 15 via the nut member 21, the screw rod 19, the rotating shaft 18a, the screw rod 20, and the nut member 22 in order,
The lower rod 15 moves in the same direction. This lower rod 1
By the movement in the pushing direction of 5, the turning arm 13 is turned in the direction of arrow G in FIG. 6 to give the lock mechanism 1 an unlocking displacement.

When the motor 18 rotates in the reverse direction,
Both nut members 21 and 22 are indicated by arrows E and F, respectively.
Slides in the opposite closing direction. Then, as shown in FIG. 9, both nut members 21 and 22 and both rods 14
A gap is formed between the large-diameter portions 14a and 15a of the upper and lower rods 15 and 15, and the connection between the upper rod 14 and the lower rod 15 is interrupted. In this interrupted state, even if the upper rod 14 moves in the pushing direction shown by the arrow D, the upper rod 14 only slides alone, and the movement displacement is lower rod 15
Is not transmitted to Therefore, even if the rotor 9 rotates in the unlocking direction, the link mechanism 11 does not apply the unlocking displacement to the lock mechanism 1.

As described above, only when the inhibit mechanism 16 is in the connected state, the link mechanism 11 is rotated based on the rotation of the rotor 9 in the unlocking direction.
The lock is released by giving the lock an unlocking displacement. The inhibit mechanism 16 is a lock mechanism 1
Is configured to be in a cut-off state when is in a locked state.

By the way, when the rotor 9 is rotated in the locking direction indicated by the arrow A, the moving direction of the upper rod 14 is the pulling direction, and therefore, regardless of whether the inhibit mechanism 16 is in the connected state or the closed state. The movement of the upper rod 14 in the pulling direction is transmitted to the lower rod 15 via the sleeve 17. Then, when the lower rod 15 moves in the pulling direction shown by the arrow C, the turning arm 13 is turned in the direction opposite to the arrow G to give the lock mechanism 1 a lock displacement. Therefore, when the rotor 9 is rotated in the locking direction,
Even when the inhibit mechanism 16 is in either the connected state or the cut-off state, the lock mechanism 1 can be locked.

As shown in FIG. 4, the rotor 9 of the key cylinder 7 is provided with a shutter 23 which is opened at the back of the key insertion slot 9a when the key 10 is inserted. This shutter 23 has shaft portions 23a at both ends.
, And is urged in the closing direction by a spring (not shown), and side plates 23b (only one side is shown) are integrally provided on both sides.

A permanent magnet 24 is provided on a side portion of the rotor 9 and is covered by the shutter 23 when the shutter 23 is rotated in the opening direction.

A reed switch 25 is provided outside the rotor 9. The reed switch 25 is held off by the magnetic force of the permanent magnet 24 when the shutter 23 is closed, while the key 10 is turned off. When the shutter 23 is pushed and rotated in the opening direction (see the two-dot chain line in FIG. 4) with the insertion of the shutter, the permanent magnet 24 is covered by the shutter 23 and the magnetic force lines of the permanent magnet 24 pass through the shutter 23 side. As a result, the magnetic force passing through the reed switch 25 decreases, and the reed switch 25 is turned on.
The reed switch 25 is used to connect the key 10 to the key cylinder 7.
This constitutes a detecting means for detecting insertion of an image.

A primary coil 26 is mounted at the front of the key cylinder 7. This primary coil 26
As shown in FIG. 5, when the reed switch 25 is turned on, the power is supplied through the inverter device 27. Reference numeral 28 denotes a battery on the vehicle body side.

On the other hand, at the base of the key 10, as shown in FIGS. 1 and 2, a main body 29 of the transmitting device is integrally provided. The main body 29 includes a first case portion 30 formed by insert molding with the key 10, and a second case portion 32 attached with screws 31 so as to cover an opening of the first case portion 30. ing.

The main body 29 has a transmission circuit 33 (see FIG. 3).
, A push button-type lock switch 35 and an unlock switch 36 for causing the transmission circuit 33 to perform a transmission operation, a secondary battery 37 as a power source of the transmission circuit 33, and a primary of the key cylinder 7 side. Coil 2
A secondary coil 38 and the like corresponding to 6 are provided.

Here, the electrical structure of the key 10 on the main body 29 side will be described with reference to FIG. The full-wave rectifier circuit 39 is configured by bridge-connecting diodes 39a to 39d, a parallel circuit of the secondary coil 38 and the capacitor 40 is connected between its AC input terminals, and a constant voltage diode is connected between its DC output terminals. A parallel circuit of a capacitor 41 and a capacitor 42 is connected. Further, a reverse current blocking diodes 43 and 44 and a series circuit of the secondary battery 37 are connected in parallel with the capacitor 42.
Is connected to the positive power input terminal 33a of the transmission circuit 33, and the negative terminal of the secondary battery 37 is connected to the negative power input terminal 33b of the transmission circuit 33 via the lock switch 35.

The transmission circuit 33 has a signal input terminal 33c in addition to the positive and negative power supply input terminals 33a and 33b. When a DC voltage is applied between the positive and negative power supply input terminals 33a and 33b. When the signal at the signal input terminal 33c is at a low level, an aerial propagation signal is output from the antenna 45, in this case, a lock signal is output by a radio signal. When the signal at the signal input terminal 33c is at a high level, an unlock signal is output from the antenna 45. Output.

The series circuit of the unlocking switch 36 and the resistor 46 is connected between the positive and negative power supply input terminals 33a and 33b of the transmitting circuit 33, and the capacitor 47 and the resistor 47 are connected in parallel with the resistor 46. A series circuit of the resistor 48 and the diode 49 is connected, and a common connection point of the resistor 48 and the diode 49 is connected to the signal input terminal 33c.

Further, the common connection point of the unlocking switch 36 and the resistor 46 is connected to the anode of the diode 43 via the reverse current blocking diode 50 and the base of the NPN transistor 52 via the resistor 51. It is connected to the. The emitter and the collector of the transistor 52 are connected to both terminals of the lock switch 35, and a resistor 53 is connected between the base and the emitter of the transistor 52.

The resistor 54 and the reverse current blocking diode 55 are connected in series between the anode of the diode 43 and the positive terminal of the secondary battery 37, thereby forming a charging circuit 56.

When the lock switch 35 is turned on in a normal case where the power of the secondary battery 37 is high, the positive and negative power supply input terminals 33a, 33a of the transmission circuit 33 are turned on.
The DC voltage of the secondary battery 37 is applied between 33b and the signal at the signal input terminal 33c becomes low level. Based on this, the transmission circuit 33 outputs a lock signal from the antenna 45, while the unlock switch 36 When the transistor 52 is turned on, the positive and negative power input terminals 33a and 33b of the transmission circuit 33 are turned on based on the turning on of the transistor 52.
In the meantime, the DC voltage of the secondary battery 37 is applied, and the signal at the signal input terminal 33c becomes high level. Based on this, the transmitting circuit 33 outputs an unlock signal from the antenna 45.

The radio signal emitted from the transmitting circuit 33 is received by the automobile antenna 57 shown in FIG. The radio signal is configured as a code signal of several tens of bits, and the contents of the code are different between the lock signal and the unlock signal, and the lock signal and the unlock signal are respectively set to specific codes for each vehicle. .

The radio signal received by the antenna 57 is transmitted to a code discriminating circuit 58 as a received signal discriminating means. The code discriminating circuit 58 discriminates whether the code of the received radio signal is a specific code specified for the vehicle and whether the code is a lock signal or an unlock signal. When the code is a specific code, the lock electromagnet 3 of the electric operation mechanism 2 is energized to lock the lock mechanism 1 in response to the lock signal. In response to the unlock lock signal, the unlocking electromagnet 4 of the electric operating mechanism 2 is energized to cause the lock mechanism 1 to perform the unlock operation, and the inhibit mechanism 1 is operated.
6 is configured to rotate the motor 18 in the forward direction to bring the inhibit mechanism 16 into a connected state.

Next, the operation of the above configuration will be described. Now, it is assumed that the driver operates the lock switch 35 of the key 10 to lock the door when leaving the car. Then, the transmitting circuit 33 performs transmitting operation and the antenna 45
Generates a lock signal as a radio signal, and the radio signal is received by the antenna 57 on the automobile side and transmitted to the code discrimination circuit 58.

The code discriminating circuit 58 energizes the locking electromagnet 3 of the electric operating mechanism 2 only when the radio signal is a specific code. As a result, a lock displacement is given to the lock mechanism 1 to lock the door in the closed state, and the motor 18 of the inhibit mechanism 16 rotates in the opposite direction in conjunction with the locking operation of the lock mechanism 1, thereby causing the inhibit mechanism to rotate. 16 is turned off (see FIG. 9).

On the other hand, to unlock the door for driving the automobile, the unlock switch 36 of the key 10 is operated. Then, the transmitting circuit 33 performs a transmitting operation, and an unlock signal is transmitted as a radio signal from the antenna 45, and the radio signal is received by the antenna 57 on the automobile side and transmitted to the code discriminating circuit 58.

The code discriminating circuit 58 discriminates whether or not the radio signal is a specific code. If the radio signal is a signal of a specific code, the unlocking electromagnet 4 of the electric operating mechanism 2 is energized, and the motor 18 of the inhibit mechanism 16 is rotated in the forward direction to activate the inhibit mechanism 16. The connection state (see FIG. 8) is set. By the energization of the unlocking electromagnet 4, the lock mechanism 1 is given an unlocking displacement, and the door is unlocked.

When the radio signal is not a specific code, the code discriminating circuit 58 does not energize the unlocking electromagnet 4 and does not rotate the motor 18 of the inhibit mechanism 16 in the forward direction. Therefore, the lock mechanism 1 remains locked and the door cannot be opened.

When the door is locked, it is assumed that a person other than the driver attempts to unlock the door and inserts foreign matter into the rotor 9 of the key cylinder 7 and rotates the same in the unlocking direction. Then, the turning arm 12 turns in the unlocking direction indicated by the arrow B, and moves the upper rod 14 in the pushing direction indicated by the arrow D.

However, since the inhibit mechanism 16 is in the shut-off state shown in FIG. 9 and there is a gap between the upper rod 14 and the nut member 21,
Slides alone with respect to the sleeve 17, and its displacement is not transmitted to the lower rod 15. Therefore, even if the rotor 9 is rotated in the unlocking direction, the lock mechanism 1
Remains locked and the door cannot be opened.

Therefore, unless the radio signal emitted from the transmitting circuit 33 of the key 10 is a specific code, the inhibit mechanism 16 cannot be switched to the connected state, so that even if the manual operation mechanism 6 is provided, Operation mechanism 6
Therefore, the door cannot be unlocked illegally, and the effect of preventing theft is extremely large.

On the other hand, the lock release electromagnet 4 of the electric operation mechanism 2 may break down due to long-term use. Then, the lock of the lock mechanism 1 cannot be released by the lock release electromagnet 4. In such a case, the door is unlocked by the manual operation mechanism 6.
To do so, first unlock the key 10 with the switch 3
By operating 6, the unlock signal is emitted from the transmission circuit 33 as a radio signal. Then, in the same manner as described above, the motor 18 of the inhibit mechanism 16 rotates in the forward direction to bring the inhibit mechanism 16 into a connected state.

Then, the key 10 is inserted into the rotor 9 and rotated in the unlocking direction. Then, the swing arm 1
2 rotates in the same direction to move the upper rod 14 in the pushing direction, so that the displacement in the pushing direction is transmitted to the lower rod 15 via the inhibit mechanism 16 in the connected state.
The lower rod 15 is moved in the pushing direction. Due to the movement of the lower rod 15 in the pushing direction, the turning arm 13
To give the lock mechanism 1 an unlocking displacement. As a result, the lock mechanism 1 performs an unlock operation to unlock the door.

Therefore, even if the electric operation mechanism 2 breaks down,
The lock mechanism 1 can be unlocked by the manual operation mechanism 6.

When the secondary battery 37, which is the power supply of the transmission circuit 33, is consumed by long-term use, the transmission operation of the transmission circuit 33 cannot be performed. In such a case, since the radio signal cannot be emitted, the door cannot be unlocked by the electric operation mechanism 2,
In addition, since the inhibit mechanism 16 cannot be brought into the connected state, the lock of the door cannot be released even by the manual operation mechanism 6.

In such a case, the key 10 is inserted into the key insertion port 9a of the key cylinder 7. Then, the shutter 23 is rotated in the opening direction by being pressed by the key 10 (see a two-dot chain line in FIG. 4), and the permanent magnet 24 is covered by the shutter 23, and most of the magnetic force lines of the permanent magnet 24 are , The magnetic force passing through the reed switch 25 decreases, and the reed switch 2
5 is turned on. When the reed switch 25 is turned on, the power supply of the primary coil 26 is controlled via the inverter device 27.

The primary coil 26 is driven by the inverter device 27.
When the current flowing through the primary coil 26 changes, an induced electromotive force is generated in the secondary coil 38 on the key 10 side based on this. The transistor 52 is turned on with the generation of the induced electromotive force, and based on this, the positive and negative power supply input terminals 33a and 33b of the transmission circuit 33 are turned on.
A DC voltage is applied between the input terminal and the signal input terminal 33c.
Becomes high level, and based on this, the transmission circuit 33
Outputs an unlock signal from the antenna 45 for a certain period of time. In addition, at this time, as an induced electromotive force is generated in the secondary coil 38, electric charge is stored in the capacitor 42, and the secondary battery 37 is charged.

When the unlock signal is transmitted from the transmitting circuit 33 in this way, the radio signal is received by the antenna 57 on the automobile side and transmitted to the code discriminating circuit 58 as described above. The code discriminating circuit 58 discriminates whether the radio signal is a specific code, and if the radio signal is a signal of a specific code, energizes the unlocking electromagnet 4 of the electric operating mechanism 2. At the same time, the motor 18 of the inhibit mechanism 16 is rotated in the forward direction to bring the inhibit mechanism 16 into a connected state. By the energization of the unlocking electromagnet 4, the lock mechanism 1 is given an unlocking displacement, and the door is unlocked.

As described above, according to the present embodiment, when the secondary battery 37, which is the power supply of the transmitting circuit 33 in the key 10, is exhausted and the transmitting circuit 33 cannot transmit, the key 10 is moved to the key cylinder. 7, when the primary coil 26 of the key cylinder 7 is energized, an induced electromotive force is generated in the secondary coil 38 of the key 10, and based on this, an unlock signal is automatically transmitted from the transmission circuit 33. Thus, the door can be unlocked.

In the above-described embodiment, the case where the inhibit mechanism 16 is provided in the manual operation mechanism 6 is exemplified. However, the present invention can also be applied to a structure without the inhibit mechanism 16.

The airborne signal is not limited to a radio signal, but may be an ultrasonic signal or an infrared signal.

Further, the present invention can be applied to a device other than a wireless door lock device of an automobile.

[0055]

As is apparent from the above description, the transmitting device of the present invention has a key that can be inserted into a key cylinder,
In a circuit provided with a transmitting circuit that emits an airborne signal and a power supply for the transmitting circuit, the key cylinder includes a detecting unit that detects insertion of a key into the key cylinder, and a primary coil that is energized based on the detection of the detecting unit. The key is provided with a secondary coil in which an induced electromotive force is generated based on a change in current flowing through the primary coil in a state of being inserted into a key cylinder, and the transmitting circuit of the transmitting circuit is generated based on the induced electromotive force generated in the secondary coil. By adopting the configuration to perform the transmission operation, even if the power of the transmission circuit is exhausted and the power is exhausted, the transmission operation of the transmission circuit can be performed based on the insertion of the key into the key cylinder. Play.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a key showing one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a key.

FIG. 3 is an electrical configuration diagram of a key side.

FIG. 4 is a cutaway side view of the key cylinder.

FIG. 5 is an electrical configuration diagram of the key cylinder side.

FIG. 6 is a schematic configuration diagram of a lock mechanism portion.

FIG. 7 is a block diagram showing mechanical and electrical connections related to a lock mechanism.

FIG. 8 is an enlarged longitudinal sectional view showing the inhibit mechanism in a connected state.

FIG. 9 is an enlarged longitudinal sectional view showing the inhibit mechanism in a cut-off state.

[Explanation of symbols]

1 is a lock mechanism, 2 is an electric operation mechanism, 6 is a manual operation mechanism, 7 is a key cylinder, 10 is a key, 16 is an inhibit mechanism, 18 is a motor, 25 is a reed switch (detection means), and 26 is a primary coil. 33, a transmission circuit, 35, a lock switch, 36, an unlock switch, 37, a secondary battery (power supply), 38, a secondary coil, and 58, a code discrimination circuit.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-107646 (JP, A) JP-A 64-30982 (JP, U) JP-A 3-121982 (JP, U)

Claims (1)

(57) [Claims] 1. A key which can be inserted into a key cylinder,
A transmission circuit for transmitting an airborne signal and a power supply for the transmission circuit, wherein the key cylinder detects a key inserted into the key cylinder, and a primary current supplied based on the detection of the detection means. And a secondary coil in which an induced electromotive force is generated based on a change in current flowing through the primary coil when the key is inserted into a key cylinder. A transmitting device having a configuration for performing a transmitting operation of a circuit.