JPH0747252Y2 - Vehicle handle device - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a vehicle handle device in which a control circuit is provided in a handle portion.

[Prior art]

Depending on the vehicle, the handle portion of the vehicle handle device is provided with various switch circuits other than the horn switch circuit, a transmission circuit for the vehicle load control device, and a control circuit such as a control circuit including a microcomputer. is there. FIG. 2 shows a first conventional example of such a vehicle handle device. In this example, the handle is provided with a microcomputer control circuit. In FIG. 2, 1 is a battery, 2 is a key switch, 3,
4 and 5 are fuses, 6 is horn, 7,8 and 9 are sliding contacts, 7a is slip contact, 7b is slip ring,
Reference numeral 10 is a steering shaft, 11 is a horn switch, 12 is a microcomputer control circuit, B is a backup power supply terminal, E is a ground terminal, IG is an ignition signal terminal, and H is a handle portion. The sliding contact 7 is a general term for a slip contact 7a on the steering post (not shown) side and a slip ring 7b on the handle H side. Key switch 2
When the horn switch 11 is turned on while the power is on, the battery 1 → key switch 2 → fuse 3
-> Horn 6-> Sliding contact 7-> Horn switch 11-> Steering shaft 10 A current flows through the route, and the horn 6 blows. The diode 13 is for preventing the current flowing at this time from flowing backward to the microcomputer control circuit 12. In order to retain the memory contents, the microcomputer control circuit 12
It is necessary to supply power to the backup power source terminal B regardless of whether the key switch 2 is on or off. Therefore, a sliding contact 9 is provided, through which the battery 1 constantly supplies power to the backup power supply terminal B. Further, since the microcomputer control circuit 12 is set to the operating state when the key switch 2 is turned on, a sliding contact for transmitting a signal for turning on the key switch 2 is also required. Therefore, the sliding contact 8 is provided, and the signal for turning on the key switch 2 is passed through the ignition signal terminal IG.
Tell. Therefore, in the case of this example, the handle portion H and the steering post must be designed to have three sliding contacts including the sliding contact 7 for the horn. The case where the control circuit provided in the handle portion H is the microcomputer control circuit has been described above. However, in the case of a control circuit different from this, the number of required sliding contacts may be different. Further, if no circuit requiring power supply is provided outside the horn switch circuit, only one sliding contact is required. As described above, the number of sliding contacts required varies depending on whether the handle portion H is provided with a control circuit or what the control circuit is configured to have. Therefore, the handle part and the sliding contact part of the steering post must be individually designed according to the number of sliding contacts, resulting in cost increase, lack of compatibility, and complicated parts management. It was Therefore, the following proposal has been made to take in the power supply to the control circuit by using the sliding contact 7 for the horn (Japanese Patent Laid-Open No. 57-7736). FIG. 3 shows a second conventional example of a vehicle handle device. Reference numerals correspond to those in FIG. 2, L is a horn relay, L1 is a relay coil, and L2 is a relay contact. When the horn switch 11 is turned on, a current flows through the relay coil L1 and the relay contact L2 is turned on. Then, an electric current flows through the horn 6 and is blown. Power to the control circuit 12 is constantly supplied via the relay coil L1 of the horn relay L and the sliding contact 7. Therefore, it is not necessary to provide a dedicated sliding contact. However, the current flowing through the relay coil L1 to the control circuit 12 is not large enough to activate the horn relay L (that is, it does not energize the relay coil L1 to turn on the relay contact L2). Consideration is given to staying in a size that does not exist.

In the above-described conventional example, the control circuit provided in the handle portion is entirely powered by the battery including the backup power source. Therefore, there is a problem in that the wiring becomes long, a failure (for example, disconnection, contact failure at the sliding contact, etc.) is likely to occur on the wiring, and power supply to the control circuit may be interrupted. The present invention aims to solve such problems.

[Means for Solving the Problems]

In order to solve the above problems, in a vehicle handle device of the present invention, a horn switch having a first fixed contact and a second fixed contact for blowing a horn, a parallel connection body of a control circuit and a capacitor, and A current limiting resistor and a reverse current blocking diode connected in series between the first fixed contact and the parallel connection body are provided in the handle portion.

[Action]

With the above-described configuration, current is supplied to the control circuit and the capacitor in the handle portion through the first fixed contact while the horn switch is not pressed. In this case, the current from the battery is supplied by using the sliding contact for supplying the current for blowing the horn. This current is made smaller than the amount of sounding the horn due to the current limiting resistance. Even if some trouble occurs in the wiring from the battery to the handle part and the power supply to the control circuit is stopped,
Since the capacitor connected in parallel with the control circuit has been charged by then, the control circuit is immediately powered by the discharge current from this capacitor. Note that when the horn switch is pressed, the current from the battery to the control circuit is cut off, but in the same manner as above, power is immediately supplied from the capacitor to the control circuit, so there is no interruption in power supply to the control circuit. Absent.

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a vehicle handle device according to an embodiment of the present invention. Here again, an example in which a microcomputer control circuit is provided as the control circuit will be described. The reference numerals correspond to those in FIG. And 11A, 11
B is a fixed contact, 14 and 15 are diodes, 16 is a resistor, 17
Is a switch, 18 is a capacitor, and 19 is a solar cell. Since the capacitor 18 is for use as a backup power source, it is desired to be a small-sized and large-capacity capacitor. One such example is an electric double layer capacitor. As the horn switch 11, one having two fixed contacts is used. When the horn switch 11 is pressed to blow the horn 6, the fixed contact 11B is turned on. When the horn switch 11 is not pressed, it is on to the fixed contact 11A side. This state corresponds to OFF in the case of the conventional horn switch. The diode 15 is for absorbing surge. The key switch 2 is turned on and the horn switch
While 11 is off (on the fixed contact 11A side), current is supplied from the battery 1 to the backup power supply terminal B of the microcomputer control circuit 12, and the charging current is also supplied to the capacitor 18. The current to the backup power supply terminal B is battery 1 → key switch 2 → fuse 3 → horn 6 → sliding contact 7 → fixed contact 11A → resistor 16 → diode 14 → backup power supply terminal B (microcomputer control circuit 12) → diode 13 → Supplied via the steering shaft 10. The contents of the memory in the microcomputer control circuit 12 are retained by this current. The charging current to the capacitor 18 is battery 1 → key switch 2 → fuse 3 → horn 6 → sliding contact 7 → fixed contact 11
A → resistor 16 → diode 14 → capacitor 18 → diode 1
3 → Steering shaft 10 is supplied. The resistor 16 is a current limiting resistor for preventing the horn 6 from being blown by these currents. Also, the signal current when the key switch 2 is turned on is
When the ignition signal terminal IG of the microcomputer control circuit 12 is flown, the microcomputer control circuit 12 is put into an operating state. This signal current flows in the route of battery 1 → key switch 2 → fuse 3 → horn 6 → sliding contact 7 → fixed contact 11A → ignition signal terminal IG → diode 13 → steering shaft 10. In such a vehicle handle device, if, for example, the wiring is cut in the middle of the wiring from the battery 1 to the handle portion H, the current from the battery 1 to the backup power supply terminal B is cut off, but immediately from the capacitor 18 to the backup power supply. It is possible to prevent the contents of the memory from being lost due to the discharge current flowing through the terminal B. Although not disconnection, the discharge current from the capacitor 18 is also supplied when the voltage supplied to the backup power supply terminal B is lowered due to a contact failure or the like. When the horn 6 sounds, the horn switch 11 is turned on to the fixed contact 11B side. Then, a current flows through the battery 1, the key switch 2, the fuse 3, the horn 6, the sliding contact 7, the fixed contact 11B, and the steering shaft 10, and the horn 6 blows. However, if the switch is turned on to the fixed contact 11B side due to the horn blowing, the current from the fixed contact 11A to the backup power supply terminal B via the resistor 16 and the diode 14 is cut off, but the discharge current from the capacitor 18 is immediately released from the backup power supply. Terminal B
The contents of the memory are never lost because they flow to. Further, although the fixed contact 11A is turned off, the current from the battery 1 to the ignition signal terminal IG is cut off, but at the same time, the switch 17 is turned on and the current is supplied from the capacitor 18 to the ignition signal terminal IG. Therefore, the operating state of the microcomputer control circuit 12 does not stop. In the above, the case where the capacitor 18 is charged and the microcomputer control circuit 12 is powered only by the battery 1 is exclusively used.
It is also possible to install the solar cell 19 on the handle portion H so that the current from the solar cell 19 is also used. The present invention can be similarly applied to a vehicle handle device having a control circuit other than the microcomputer control circuit.

[Effect of device]

As described above, according to the present invention, the capacitor is connected in parallel with the control circuit in the handle portion, and the power is supplied from the capacitor when the power supply from the battery is interrupted. Even if a failure such as disconnection occurs, the operation of the control circuit is no longer damaged.

[Brief description of drawings]

1 ... Vehicle handle device according to an embodiment of the present invention FIG. 2 ... First conventional example of vehicle handle device FIG. 3 ... Second conventional example of vehicle handle device In the drawings, 1 is a battery and 2 is a key Switch, 3, 4 and 5 are fuses, 6 is horn, 7, 8 and 9 are sliding contacts, 7a is slip contact, 7b is slip ring, 10
Is a steering shaft, 11 is a horn switch, 12 is an electric circuit, 13, 14 and 15 are diodes, 16 is a resistor, 17 is a switch, 18 is a capacitor, 19 is a solar cell, L is a horn relay, L1 is a relay coil, L2 is a relay contact and H is a handle part.

Claims (1)

[Scope of utility model registration request] 1. A horn switch having a first fixed contact and a second fixed contact for blowing a horn, a parallel connection body of a control circuit and a capacitor, the first fixed contact and the parallel connection body. A vehicle handle device characterized in that a resistor for current limiting and a diode for preventing reverse current, which are connected in series between and, are provided in the handle portion.