JP2659151C - - Google Patents

Description

Description: 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 that can be inserted into a key cylinder, and a transmitting device including a power supply for the circuit. 2. Description of the Related Art For example, some automobiles have recently been 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 can automatically lock and unlock the door simply by pressing an operation button to cause the transmission circuit to perform a transmission operation, so that it is very convenient in use. is there. [0004] However, in the above-described configuration, when the power source of the transmission circuit is depleted and the power is exhausted, a radio signal cannot be emitted. Lock operation and unlock 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] The present invention SUMMARY OF THE INVENTION is the key that can be inserted into the key cylinder, the oscillator having a transmission circuit and which power emit airborne signal, the front portion of the key cylinder ,
Detecting means for detecting insertion of a key into the key cylinder; and a primary coil which is energized based on the detection of the detecting means, wherein a change in a current flowing through the primary coil when the key is inserted into the key cylinder is provided. , A secondary coil generating an induced electromotive force is provided, and the transmitting operation of the transmission circuit is performed based on the induced electromotive force generated in the secondary coil. When the power of the power supply is normal, an airborne signal can be generated by causing the transmission circuit to perform a transmission operation. However, when the power of the power supply runs out, the transmission circuit transmits the signal. An airborne signal cannot be emitted even if it is operated. 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 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. The electric operation mechanism 2 that electrically operates the lock mechanism 1 includes an electromagnet 3 for locking and an electromagnet 4 for unlocking as an electric actuator. Then, the door lock / unlock switch 5 shown in FIG.
When the lock electromagnet 3 is energized, a movable iron core (not shown) is attracted and displaced by the lock electromagnet 3 to apply a lock displacement to the lock mechanism 1 to lock the door in a closed state. When the door unlocking / unlocking switch 5 is energized to the unlocking electromagnet 4, the movable iron core (not shown) is attracted to the unlocking electromagnet 4 and displaced in a direction opposite to that at the time of locking. The door is unlocked by giving a release displacement. 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. A rotor 9 is rotatably provided in a rotor case 8 of the key cylinder 7, 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. Upper rod 14 and lower rod 1 provided to be connected
5 is provided. 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,
This is to prevent transmission to the lower rod 15. In FIG. 8, which shows a specific configuration of the inhibit mechanism 16, reference numeral 17 denotes a sleeve. Ends of the upper rod 14 and the lower rod 15 are slidably inserted inside both ends of the sleeve 17. Large diameter portions 14a and 15a are formed at the ends of both rods 14 and 15, and the large diameter portions 14a and 15a are locked to the ends of the sleeve 17, so that both rods 14 and 15 are formed. Fifteen
Is configured not to fall out of the sleeve 17. At the center of the sleeve 17, there is disposed a biaxial motor 18, which is configured as an electric actuator so as to be rotatable forward and backward, and screw rods 19 and 20 are fixed to both ends of the rotating shaft 18 a. Have been. The external threads of both threaded rods 19 and 20 are formed so that the winding directions are opposite to each other, and nut members 21 slidably fitted to the threaded rods 19 and 20 on both axial sides in the sleeve 17. And 22 are screwed. The nut members 21 and 22 are prevented from rotating by engaging protrusions 21a and 22a protruding from the outer peripheral portion with grooves 17a formed in the inner peripheral surface of the sleeve 17 so as to extend in the axial direction. Has become. 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, both nut members 21 and 22 are connected to the large diameter portions 14 of the upper rod 14 and the lower rod 15.
The large diameter portions 14a and 15a are pressed against both ends of the sleeve 17 by contacting the large rods 14a and 15a, and the upper rod 14 and the lower rod 15 are connected. In this connection state, when the upper rod 14 moves in the pushing direction indicated by the arrow D, the movement displacement is reduced through the nut member 21, the screw rod 19, the rotating shaft 18a, the screw rod 20, and the nut member 22 in this order. The lower rod 15 is transmitted to the rod 15 and moves in the same direction. By the movement of the lower rod 15 in the pushing direction, 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, the nut members 21 and 22 slide in the closing directions opposite to the arrows E and F, respectively. Then, as shown in FIG. 9, a gap is generated between the nut members 21 and 22 and the large-diameter portions 14a and 15a of the rods 14 and 15, and the connection between the upper rod 14 and the lower rod 15 is interrupted. Becomes In this blocking 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 not transmitted to the lower rod 15. Therefore, even if the rotor 9 rotates in the unlocking direction,
The link mechanism 11 does not give the lock mechanism 1 an unlocking displacement. As described above, only when the inhibit mechanism 16 is in the connected state, the link mechanism 11 releases the lock by giving the lock mechanism 11 an unlocking displacement based on the rotation of the rotor 9 in the unlocking direction. Will be done. The inhibit mechanism 16 is configured to be in a shut-off state when the lock mechanism 1 is in a locked state. Incidentally, since the moving direction of the upper rod 14 when the rotor 9 is rotated in the locking direction indicated by the arrow A is the pulling direction, even if the inhibit mechanism 16 is in either the connected state or the closed state. The upper rod 14 is moved in the pulling direction by the sleeve 17.
Through the lower rod 15. 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 lock direction, regardless of whether the inhibit mechanism 16 is in the connected state or the shut-off state,
The locking mechanism 1 can perform a locking operation. Now, as shown in FIG. 4, the rotor 9 of the key cylinder 7 has a key insertion port 9.
A shutter 23 which is opened in response to the insertion of the key 10 is provided on the rear side of the shutter a. The shutter 23 is rotatable about shaft portions 23a at both ends and is urged in a closing direction by a spring (not shown). Side plates 23b (only one side is shown) are integrated on both sides. It is provided in. A permanent magnet 24 is provided on a side portion inside the rotor 9, and the permanent magnet 24
When the shutter 23 is rotated in the opening direction, it is covered by the shutter 23. A reed switch 2 is provided at a front part outside the rotor 9 (a front part of the key cylinder 7).
5, the reed switch 25 is held in the off state by the magnetic force of the permanent magnet 24 when the shutter 23 is closed, while the shutter 23 is pushed by the insertion of the key 10 to open. When rotated (see the two-dot chain line in FIG. 4), the permanent magnet 24 is covered by the shutter 23 so that the lines of magnetic force of the permanent magnet 24 pass through the shutter 23 side. The passing magnetic force is reduced to turn on. The reed switch 25 constitutes detecting means for detecting insertion of the key 10 into the key cylinder 7. A primary coil 26 is mounted on the front of the key cylinder 7. As shown in FIG. 5, when the reed switch 25 is turned on, the primary coil 26 is energized via an inverter device 27. Note that 28
Is a battery on the vehicle body side. On the other hand, as shown in FIGS. 1 and 2, a main body 29 of the transmitting device is integrally provided at the base of the key 10. 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 includes a printed circuit board 34 having a transmission circuit 33 (see FIG. 3), a push-button lock switch 35 and an unlock switch 36 for causing the transmission circuit 33 to perform a transmission operation, and a transmission circuit 33. A secondary battery 37 as a power source, a secondary coil 38 corresponding to the primary coil 26 on the key cylinder 7 side, and the like are provided. Here, an electrical configuration 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 series circuit of the reverse current blocking diodes 43 and 44 and the secondary battery 37 is connected in parallel with the capacitor 42. The cathode of the diode 43 is connected to the positive power supply input terminal 33 a of the transmission circuit 33. The negative terminal 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, and 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 33 a and 33 b of the transmitting circuit 33, and a capacitor 47 and a 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, a common connection point between the unlocking switch 36 and the resistor 46 is connected to the anode of the diode 43 via the backflow preventing diode 50.
The resistor 51 is connected to the base of an NPN transistor 52. 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 backflow prevention diode 55 are connected in series between the anode of the diode 43 and the positive terminal of the secondary battery 37, thereby constituting a charging circuit 56. Thus, in a normal case where the power of the secondary battery 37 is high, the lock switch 3
5 is turned on, the positive and negative power input terminals 33a, 33
The DC voltage of the secondary battery 37 is applied during the period b, 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, and the unlock switch 36 When the transistor 52 is turned on, the positive and negative power supply input terminals 33a,
The DC voltage of the secondary battery 37 is applied between 33b, and the signal at the signal input terminal 33c becomes high level. Based on this, the transmission circuit 33 outputs an unlock signal from the antenna 45. The radio signal emitted from the transmission 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 unlock the lock mechanism 1 and the motor 18 of the inhibit mechanism 16 is rotated in the forward direction to inhibit the lock. The mechanism 16 is configured to be connected. 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 transmission circuit 33 performs a transmission operation, and a lock 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 discrimination circuit 58. The code discriminating circuit 58 energizes the lock electromagnet 3 of the electric operation 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 to drive 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 determining circuit 58 determines whether 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. Let it be in a connected state (see FIG. 8). By the energization of the unlocking electromagnet 4, the lock mechanism 1 is given an unlocking displacement, and the door is unlocked. If 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. By the way, when the door is locked, it is assumed that a person other than the driver tries to unlock the door and inserts a foreign object into the rotor 9 of the key cylinder 7 and turns it 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, 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. The sliding movement is not transmitted to the lower rod 15. For this reason, even if the rotor 9 is rotated in the unlock direction, the lock mechanism 1 remains locked and the door cannot be opened. Therefore, unless the radio signal emitted from the transmission 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, The operation mechanism 6 cannot illegally unlock the door, 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 lock release direction. Then, since the turning arm 12 rotates in the same direction to move the upper rod 14 in the pushing direction, the displacement in the pushing direction is transmitted to the lower rod 15 via the inhibit mechanism 16 in the connected state, and The 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 is turned in the direction of the arrow G 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. Further, when the secondary battery 37 serving as the power supply of the transmission circuit 33 is exhausted due to long-term use, the transmission operation of the transmission circuit 33 cannot be performed. In this case, since the radio signal cannot be emitted, the door lock cannot be released by the electric operating mechanism 2 and the inhibit mechanism 16 cannot be brought into the connected state. The door cannot be unlocked even by the manual operation mechanism 6. In such a case, the key 10 is inserted into the key insertion port 9 a of the key cylinder 7. Then, the shutter 23 is rotated in the opening direction by being pressed by the key 10 (FIG. 4).
The shutter 23 covers the permanent magnet 24 and the permanent magnet 2
Most of the magnetic lines of force 4 pass through the shutter 23, and the magnetic force passing through the reed switch 25 decreases, so that the reed switch 25 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 current flowing through the primary coil 26 is controlled by the inverter device 27, and when the current flowing through the primary coil 26 changes, the secondary coil 3
8, an induced electromotive force is generated. With the generation of the induced electromotive force, the transistor 52 is turned on, and based on this, the positive and negative power supply input terminals 33a, 33
A DC voltage is applied between the terminals b, and the signal at the signal input terminal 33c becomes high level. Based on this, the transmission circuit 33 outputs an unlock signal from the antenna 45 for a certain period. 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 transmission circuit 33 in this manner, the radio signal is received by the antenna 57 on the automobile side as described above, and the code discrimination circuit 58
Is transmitted to The code discriminating circuit 58 discriminates whether or not the radio signal is a specific code. If the radio signal is a signal of the specific code, the electric operation mechanism 2
And the motor 18 of the inhibit mechanism 16 is energized.
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 serving as the power supply of the transmission circuit 33 in the key 10 is consumed and the transmission operation of the transmission circuit 33 cannot be performed,
When the key 10 is inserted into the key cylinder 7, an induced electromotive force is generated in the secondary coil 38 on the key 10 side based on the energization of the primary coil 26 on the key cylinder 7 side. An unlock signal is transmitted, and the door can be unlocked. In the above-described embodiment, the case in which the inhibit mechanism 16 is provided in the manual operation mechanism 6 is exemplified. However, the present invention can be applied to a configuration without the inhibit mechanism 16. The aerial propagation 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 and can be implemented. As is apparent from the above description, the transmitting device of the present invention includes a transmitting circuit for transmitting an airborne signal to a key that can be inserted into a key cylinder, and a power supply for the transmitting circuit. Detecting means for detecting insertion of a key into the key cylinder, and a primary coil which is energized based on the detection of the detecting means, wherein the key is inserted into the key cylinder in a state where the key is inserted into the key cylinder. A secondary coil in which an induced electromotive force is generated based on a change in current flowing through the coil is provided, and the transmitting operation of the transmitting circuit is performed based on the induced electromotive force generated in the secondary coil. Even if power is lost due to power loss, the transmission operation of the transmission circuit can be performed based on the insertion of the key into the key cylinder. That. Ma
Further, a detecting means for detecting insertion of a key into the key cylinder is provided by a key cylinder.
At the front of the key so that key insertion can be detected quickly,
There is an advantage that becomes possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a key showing an embodiment of the present invention. FIG. 2 is a vertical cross-sectional view of a key. FIG. 3 is an electrical configuration diagram of a key side. FIG. 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 the lock mechanism. FIG. 9 is an enlarged vertical cross-sectional view showing the inhibit mechanism in a connected state. FIG. 9 is an enlarged vertical cross-sectional view showing the inhibit mechanism in a cut-off state. DESCRIPTION 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), 26 is a primary coil, 33 is a transmission circuit, 35 is a lock switch, 36 is an unlock switch, 37 is two Battery (Power), 38 secondary coil,
58 is a code discrimination circuit.

Claims (1)

Claims: 1. A key insertable into a key cylinder, comprising a transmitting circuit for transmitting an airborne signal and a power supply for the transmitting circuit, wherein at a front portion of the key cylinder,
Detecting means for detecting insertion of a key into the key cylinder; and a primary coil which is energized based on the detection of the detecting means, wherein a change in a current flowing through the primary coil when the key is inserted into the key cylinder is provided. A secondary coil in which an induced electromotive force is generated based on the secondary coil, and a transmitting operation of the transmitting circuit is performed based on the induced electromotive force generated in the secondary coil.