JPS5816939A - Power source circuit for vehicle - Google Patents

Abstract

PURPOSE:To supply power to a load, normally required with a power feed, even at replacement of a battery, by feeding power from a power source circuit to the load, normally required with a power feed in no relation to an on-off state of an ignition switch, and removably connecting separately an auxiliary power source to said power source circuit. CONSTITUTION:The first power source circuit C1, comprising an ignition circuit I, feeding power to a drive computer 2, radio 3 and miscellaneous accessory loads and ignition load 6 at turning on of an ignition switch 5, and a lighting circuit L, connected with each lamp to a lighting switch 8, is equipped in a power source circuit for a vehicle. While the second power source circuit C2, feeding power to the computer 2 and the like in no relation to an on-off state of the above described switch 5, is provided. Here to supply power to the computer 2 even at replacement of a battery 1, the second power source circuit C2 is provided with an auxiliary terminal 21, and power can be fed from an auxiliary power source 20 connected to the terminal 21 when the battery 1 is replaced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle power supply circuit that supplies power to various loads, and particularly to a vehicle power supply circuit that includes loads such as a drive computer and a clock that must be constantly connected to a power source. Regarding circuit improvement.

Conventionally, such a vehicle power supply circuit includes, for example, a first power supply circuit C1 connected to a load all-battery power supply (hereinafter referred to as power supply) 1 through various switches, as shown in FIG. , and a second power supply circuit C2 formed by directly connecting a load to the power supply 1 to which a voltage must always be applied. In this quiz, the first power supply circuit C1 includes a drive computer 2, an electronic tuner radio 6 (excluding each memory), and other accessories.
The ignition circuit (I) is formed by connecting the loads 4 to the accessory position 5a of the ignition switch 5, and connecting the drive computer 2 and other ignition loads 6 to the on-position 5b of the ignition switch 50, the drive computer 2, and the electronic The second power supply circuit C2 includes a lighting circuit (G) in which lamps for illuminating the tuner radio 6, clock 7, etc. are connected to a lighting switch 8, and the second power supply circuit C2 does not depend on whether the ignition switch 5 is turned on or off. First, power is constantly supplied to the drive computer 2, part of the third memory of the electronic tuner radio, the clock 7, etc., and the memory of the drive computer 2 and the electronic tuner radio 6 is maintained.
t 7 k It is designed to operate at all times to completely prevent time errors. In FIG. 1, reference numeral 9 indicates battery loads connected to the power source 1 via a predetermined switch 10;
Reference numeral 12 indicates an accessory switch for the accessory loads 4, and 12 indicates a shikarator switch 160 connected to the accessory position 5a of the ignition switch 5, which is operated by turning on/off the shikalighter switch 160.

However, when using such a conventional 111-car J4-1 as a source circuit, the second power supply circuit 02 is used for loads that need to be operated at all times, such as the drive computer 2, electronic tuner, and part of the third memory. For example, when servicing a vehicle, one terminal of the battery must be removed to ensure safety, or when replacing the battery, it is necessary to connect the drive computer 2, electronic tuner radio 6, etc. A situation occurs in which power is not supplied to the load, and the drive computer 2 and the third memory of the electronic tuner are erased, or the time on the clock 7 becomes incorrect. As a result, after installing the power supply 1 again, it is essential to adjust the newly set PL or time 7 in the memory of the drive computer 2, etc. I had to do some extra work.

The present invention has been made from the above point of view, and its object is to provide a power supply circuit with a terminal for connecting an auxiliary power supply to a power supply circuit equipped with a load that requires constant operation. During vehicle maintenance and battery replacement, the auxiliary power source can supply power to loads that require constant operation, thereby improving work efficiency during vehicle maintenance and battery replacement by eliminating the need for any work associated with stopping the operation of the load. An object of the present invention is to provide a power supply circuit for a vehicle.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

In the embodiment shown in FIG. 2, the vehicle power supply circuit is composed of a first power supply circuit C1 and a second power supply circuit C2 as in the conventional case. The power supply circuit C2 is provided with a terminal 21 for connecting the auxiliary power supply 20.

In this embodiment, the deer lighter 2 and the deer lighter switch 16 are connected to the accessory position 5a of the ignition switch 5 via the cutoff switch 10, and are connected to the drive computer 8 memory which is the load of the second power supply circuit C2. Part of it is connected in parallel with part of the memory of the IT child tuner radio 6 and the clock 7. A safety switch S2 is interposed between each load of the second power supply circuit C2 and the power supply 1, and this safety switch S2 is normally closed and can be turned on and off manually. There is.

Further, in this embodiment, the terminal 21 is configured as a power supply terminal to the Shika lighter 12, as shown in FIGS. 2 and 3, for example, and this power supply terminal is connected to the instrument panel 27. Shikaraita 12 installed in etc.
It is fixed to the outside of the storage case 22 via a support member 23, and a heat insulating Y (S material 24) is installed inside the storage case 22.
It is connected to a shikaraita receiver 25 which is supported and fixed via.

For this reason, when the shikarai lighter switch 16 is turned on by pushing the shikarai lighter 12 into the storage case 22, the shikarai lighter 12 is held in the shikarai lighter holder 25, and power is supplied to the shikarai lighter 12 through the power supply terminal. It has become.

Furthermore, considering the fact that if a voltage of about 5 to 6 V is applied to a part of the memory of the drive computer 2 etc. as the auxiliary voltage A20, the memory of the drive computer 2 etc. will not be erased. This auxiliary power supply 20 is connected to the terminal 2 through a plug 26 that fits inside the storage case 22 of the Shikalighter 12.
1 can be connected. Note that the auxiliary power source 20 may be a 12V power source using dry batteries.

Therefore, vehicle power supply i+I! according to this embodiment! When replacing the power supply 1 in the circuit, first turn off the cutoff switch S.
At the same time, the cigarette lighter 12 is completely turned off, the cigarette lighter 12 is removed from its storage case 22, the plug 26 connected to the auxiliary power source 20 is inserted into the storage case 22, and the auxiliary power source 20 is connected to the terminal 21. In this state, power is supplied from the auxiliary power source 20 to the memory section of the drive combination coater 2, the memory section of the electronic tuner radio 6, and the timer 1t17, which are loads of the second power supply circuit c2. Next, when the safety switch 82 is completely turned off and the power source 1 is removed, the work of removing the power source 1 is completed. At this time, each load of the second power supply circuit C2 is supplied with power from the auxiliary power source 20, so the drive computer 2 and the electronic controller 30th memory are not erased; The door never stops working. Also, since the cutoff switch Sl is turned off, the power from the auxiliary power supply 20 is transferred to the 1vL source circuit C for the ignition circuit (I), etc.
It is not supplied to the I side, and the ignition circuit (I
) There is no risk of wasted power being consumed by loads such as.

On the other hand, after installing the new power supply 1 in a predetermined position, first turn on the safety switch Sz'5 to fully supply power to the second power supply circuit C2VC, and then turn on the cutoff switch S1 to turn on the auxiliary power supply. Just remove 20 pieces.

In the above embodiment, the cutoff switch S1 may be provided at any location in the engine room or the passenger compartment, but for example, as shown in FIG.
2) A cut-off switch of the type SL gold film is applied to the power,
The plug 26 may be provided with a protruding piece 28 for fully suppressing the push button of the cutoff switch S1. In this case, plug 26'f! When the rainbow lighter 12 is inserted into the housing coove 22, the cutoff switch s is simultaneously opened by the protruding piece 28.
Since the cut-off switch 811 can be turned on by pressing the push button S1 fully, the cut-off switch S1 can be operated with one touch, making it extremely easy. Moreover, the above-mentioned cutoff switch S1 is
It is not absolutely necessary and does not need to be provided.

In that case, if there is no battery, the power from the auxiliary power supply 20 will be supplied not only to the second power supply circuit C2 but also to the first power supply circuit CI. It is necessary to keep ~. Further, it goes without saying that the safety switch S2 may be provided at any arbitrary location like the cutoff switch Sl, but this safety switch S2 is not essential to the present invention. Further, in the above embodiment, the terminal 21 for connecting the auxiliary power source 20 also serves as the power supply terminal for the cigarette lighter 12, but it is not necessarily limited to this, and can be used regardless of whether it is in the engine room or the passenger compartment. It can be installed at any location.

As explained above, according to the vehicle power supply circuit according to the present invention, the terminal for connecting the auxiliary power supply is connected to the power supply circuit (second power supply circuit) in which the load is biased to which it is necessary to constantly apply voltage. Since this is provided, when the battery power supply is removed during vehicle maintenance or battery replacement, it is possible to connect an auxiliary power supply to the above terminal and supply power to a load that needs to be constantly operated. It is possible to eliminate situations in which the memory of a drive computer, etc. is erased, or the clock's time is incorrect. Therefore, there is no need to reset the operation of the load to the normal state after installing the power supply, which reduces unnecessary work during vehicle maintenance and battery replacement, improving work efficiency. be able to.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an example of a conventional power supply circuit for a vehicle, Fig. 2 is a circuit diagram showing an embodiment of a power supply circuit for a vehicle according to the present invention, and Fig. 3 is a circuit diagram showing an example of a power supply circuit for a vehicle according to the present invention. A partially cutaway diagram showing the specific configuration, Figure 4 shows the installation of the cut-off switch Sl.
li! FIG. 3 is a perspective view showing an example of an if location. CI...First power supply circuit C2...Second power supply circuit Sl...Cutoff switch S2...Safety switch 7f1
...Battery power supply (power supply) 2...Dry mites 1Number 6...Electronic tuner radio 7...Time n1
12... Cigarette lighter 20... Source of assistance 21.
...Terminal 22...Storage case 25...
・Cigarette lighter receiver 26... Plug patent applicant Nissan Motor Co., Ltd.

Claims (1)

[Claims] 1) A first power supply circuit that connects a load to a power supply through various switches, and a second power supply circuit that connects a load directly to a power supply that requires full voltage application at all times. 1. A vehicle power supply circuit comprising a second power supply circuit, wherein the second power supply circuit is provided with a terminal for connecting to an auxiliary power supply. 2) The terminal is a terminal for supplying power to a cigarette lighter.'f: %, rF. The vehicle power supply circuit according to claim 1.