JPH0119220B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a device for controlling loads such as lamps and motors in automobile direction indicating devices, automatic windshield lifting devices, and the like. Conventionally, for example, in order to turn on a turn signal lamp (hereinafter simply referred to as a lamp) for direction indication in a direction indication device for a car, a turn signal switch provided on the handlebar post is operated to make the turn signal lamp blink. Furthermore, in order to turn off the light, a so-called cancel mechanism was required to mechanically reset the turn signal switch by rotating the handle in the opposite direction after operating the turn signal switch. However, with the diversification of designs within automobiles, it has become necessary to arrange the turn signal switch at a location other than the handle post, and in this case, for example, a circuit as shown in FIG. 1 may be considered. In Fig. 1, 1 and 2 are latch circuits, 3 and 4 are electromagnetic relays, and 5 and 6 are latch circuits.
are right and left turn signal lamps, respectively, 7 is a flasher circuit, 8 and 9 are right and left turn signal switches, respectively, and 10 and 11 are right and left turn signal lamps turned on by left and right rotation of the steering wheel, respectively. It is a cancel sensor and is installed around the steering wheel. 12 is a cancel switch. In the case of turning right, turning on turn signal switch 8 activates latch circuit 1.
is set, the relay 3 is turned on, and the lamp 5 blinks due to the output of the flasher 7. After the right turn is completed, the right cancel sensor 10 is turned on by turning the steering wheel to the left, the latch circuit 1 is reset, the relay 3 is turned off, and the lamp 5 is turned off. The same applies to the case of a left turn.
The cancel switch 12 performs the same function as the cancel sensors 10 and 11, respectively, and is turned on to reset the latch circuit 1 or 2 when the lamps 5 and 6 are manually turned off. The reason why the cancel switch 12 is provided is that after operating the turn signal switch 8 or 9 to change lanes, when the steering wheel is rotated in the opposite direction, the rotation angle is small and the cancel switch 10 is
Alternatively, if the lamp 5 or 6 cannot be turned off because the lamp 11 is not turned on, the lamp 5 or 6 can be turned off manually. Further, the turn signal switches 8 and 9 are usually formed with instantaneous contacts and configured to be operated by the same knob, and the cancel switch 12
is set up separately. When using the turn signal control circuit with the configuration shown in Figure 1, the switch part can be separated from the handle part, but it requires two latch circuits and two electromagnetic relays, making it expensive. At the same time, the number of parts and the number of contacts for controlling large currents are increased, so there is a drawback that reliability is worse than when the switch is provided directly on the handle post. In addition, manual cancel operation cannot be performed on the same knob, and the operator must sometimes judge whether to use the cancel operation or to turn on the turn signal switch in the opposite direction, which does not provide good operability. There were flaws. Further, by providing the cancel switch and the turn signal switch separately, the structure of the switch becomes complicated, resulting in lower reliability, troublesome operation, and high price. The present invention has been made in view of the above, and an object of the present invention is to provide a load control device that has a simple structure, can be manufactured at low cost, and has good operability. In particular, it is an object of the present invention to provide a load control method that can separate a cancel mechanism and a turn signal switch in a direction indicating device to provide a device with a simple configuration. The present invention will be explained below using examples. FIG. 2 is a block diagram of a direction indicating circuit according to an embodiment of the present invention. A control circuit for controlling the right and left signal lamps 5 and 6, a flasher circuit 7, a turn signal switch 14 that conducts an intermittent current through the flasher circuit 7 to the right or left signal lamp 5 or 6, and a control circuit for controlling the flasher circuit 7. (hereinafter also referred to as a latch circuit) 15, a latch set switch 16 for self-holding the control circuit 15, and a reset condition determination circuit 17 for releasing the self-holding of the control circuit 15. FIG. 3 is an example of a specific circuit of the block diagram shown in FIG. In this specific example, the control circuit 1
5 uses a latch relay, the latch relay coil is shown as 15-1, and the latch relay contact is shown as 15-2.The latch relay contact 15-2 and the set switch 16 are connected in parallel and connected between the power supply 13 and the flasher 7. Connect to. Further, the reset condition determination circuit 17 is connected to a reset switch 18 that switches in conjunction with the turn signal switch 14, and fixed contacts R _R and R _L of the reset switch 18, and connects the fixed contacts R _R and R _L to ground separately. It consists of right and left rotation detection switches 19 and 20 (hereinafter also referred to as latch detection contacts). Now, when the set switch 16 is turned on, a current flows through the latch coil 15-1, and the latch relay contact 15-2 maintains the on state, so that the latch relay coil 15-1 is self-held. Also,
The handle clockwise rotation detection switch 19 detects when the handle is rotated to the right and switches on switch 1.
Turn off contact 9. Further, regarding the handlebar counterclockwise rotation detection switch 20, the switch 19
It works in the same way, only the right side of is changed to the left side. Here, the movable contact of the turn signal switch 14 is T _B , the right fixed contact is T _R , the left fixed contact is T _L , the reset switch 18's movable contact is R _C , the right fixed contact is R _R , and the right fixed contact is T L . Let R _L be the fixed contact on the left side, S _B be the movable contact of the set relay 16, and S _R be the fixed contact. Next, the operation will be explained. (a) Movable contact T _B of turn signal switch 14
is located on the fixed contact T _R or T _L side, but let us now assume that it is on the fixed contact T _R side, for example.
Therefore, the movable contact R _C of the reset switch 18 is also located on the fixed contact R _R side. Further, the steering wheel right or left rotation detection switches 19 and 20 are both in the on state unless the steering wheel is rotated to the right or left. Further, the set switch 16 is in the off state, and the voltage of the power supply 13 is not applied to the flasher 7, and the turn signal lamps 5 and 6 are not applied.
is off. (b) From the above state, turn on the set switch 16 momentarily. When the set switch 16 is turned on, the latch relay coil 15-
1, the latch relay contact 15-2 turns on, and the latch relay coil 15-1
Current flows through the latch relay contact 15-2, and the latch relay coil 15-1 is self-held. At the same time, the voltage of the power supply 13 is applied to the flasher circuit 7 through the latch relay contact 15-2, the flasher circuit 7 oscillates, and the turn signal lamp 5 starts blinking. This state indicates a right turn. (c) Next, when the handle is rotated to the right, the handle clockwise rotation detection switch 19 is momentarily turned off, but the current in the latchley coil 15-1 is passed through the contacts R _C and R _R of the reset switch 18 and the handle counterclockwise rotation detection switch. 20, the latch relay coil 15-1 remains energized and the turn signal lamp 5 continues to blink. (d) When the car finishes turning right and turns the steering wheel to the left, the left steering wheel rotation detection switch 20
turns off for a moment. When the left-handle rotation switch 20 is turned off, the current in the latch relay coil 15-1 is cut off, and the latch relay contact 15-2 is turned off. Therefore, the voltage of the power supply 13 to the flasher circuit 7 is cut off, the oscillation of the flasher circuit 7 is stopped, and the turn signal lamp 5 is turned off. (E) When the lane change is completed from the state of (C) above, or if you want to turn off the lamp 5 for some reason, turn the turn signal switch 14.
If you switch the contact T B to the T _L side and bring the contacts T _B and T _L into contact, the reset switch 1
Contact R _C of No. 8 also switches from contact R _R to R _L. During this switching, the latch relay coil 15-
1 current is cut off and the latch relay contact 15-
2 is turned off, the connection between the flasher circuit 7 and the power supply 13 is cut off, the oscillation of the flasher 7 is stopped, and the turn signal lamp 5 is turned off. Also, in this state, the latch relay coil 15
Since the self-holding of -1 is once released, the signal lamp 6 does not start blinking. After this, if you want to display a left turn, press the set switch 1.
6 should be turned on momentarily. The above description deals with a right turn, but the same applies to a left turn, so a detailed explanation thereof will be omitted. Next, a control switch S in which the turn signal switch 14, reset switch 18 and set switch 16 are integrated and can be operated by one lever will be described. 4 and 5 are an exploded perspective view and a sectional view showing the structure of a control switch according to an embodiment of the present invention.
Reference numeral 21 denotes a switch outer case, and the switch outer case 21 is provided with a recess 21', and a stable point A is provided in the center of the recess 21, and a first one is placed at a symmetrical position across the stable point A.
and second nodal points B and C are provided.
On the other hand, a lever 23 is provided on the lid 22 of the outer box 21, passing through the lid 22 and being supported and rotatable.
A ball 24 is attached to the tip of the lever 23, and the ball 24 is configured to always come into contact with the recess 21' by a spring 25 inserted into the tip of the lever 23. On the other hand, a fixed contact plate 26 is fixed inside the outer case 21.
The bottom surface has contacts S _B , S _R , T _R , as shown in Figure 6a.
T _L , T _B , R _R , R _L , and R _C are provided. On the other hand, a movable contact plate 27 is provided close to the lower surface of the fixed contact plate 26 so as to be movable relative to the fixed contact plate 26 by a lever 23. The surface of the movable contact plate 27 has a sixth
As shown in figures b to e, contacts V ₁ to V ₆ are provided,
The movable contact plate 27 is configured to switch the contact group of the fixed contact plate 26 by the movable contact group by moving the movable contact plate 27. Note that 28 is a spring that supports the movable contact plate 27. Further, the fixed contact plate 26 is provided with an elongated hole 29 so that the lever 23 can freely rotate, and the movable contact plate 27 is also provided with an elongated hole 30 through which the lever 23 passes. However, long hole 30
When the lever 23 is swung and the ball 24 is moved from the stable point A to the nodal point B and from the stable point A to the nodal point C, the movable contact plate 27 moves to the positions shown in FIGS. 6b and 6c, and the lever 23 When the movable contact plate 27 moves beyond the nodal point B to the nodal point D and beyond the nodal point C to the nodal point E, the movable contact plate 27 moves as shown in FIG.
It is designed to move to the position of Furthermore, holes 31 and 32 are provided in the movable contact plate 27, and a pair of a spring 33 and a moderation ball 34 and a pair of a spring 35 and a moderation ball 36 are inserted into the holes 31 and 32, respectively. On the other hand, the outer case 21 on which the movable contact plate 27 is placed has concave portions B' and C' that form moderate ridges. Therefore, when the ball 24 is facing the stable point A, the lever 23 is in a vertical state and the movable contact plate 27
does not move, but remains at the position when the ball 24 hits the nodal point B or C depending on the direction in which it reaches the stable point A. In other words, when the lever 23 is rotated from the moderation point B side to the stable point A side, the ball 3
4 and 36 are located in the recess B', the movable contact plate 27 is in the position shown in the R position in FIG. 6b. Then, move the lever 23 from the stable point A to the node C side.
When the contact plate 27 is rotated, the movable contact plate 27 is moved and the balls 34 and 36 are located in the recess C', so that the movable contact plate 27 is fixed at the position L shown in FIG. 6c. Furthermore, as is clear from FIGS. 4 and 5, the distance between the center of rotation of the lever 23 and the stable point A is the maximum, and the natural position of the lever 23 is when the ball 24 is at the stable point A. Lever 2
3 is configured so that the ball 24 returns to the stable point A. Further, by rotating the lever 23 to the right from the state shown in FIG. 5, the moderation balls 34 and 36 come out of the recess B', and the movable contact plate 27 is moved in the same direction as the lever 23 to the position shown in FIG. 6d.
Move it to the position shown in R _M. The ball 24 of the lever 23 is now at the nodal point D, and by releasing the lever 23 it returns to the stable position A. However, in this case, the movable contact plate 27 will only return to the moderation point B due to the moderation peak B'. Also, by rotating the lever 23 in the opposite direction, the other end of the elongated hole 30 of the rotary contact plate 27 is pushed by the lever 23, the movable contact plate 27 slides in the opposite direction, and the moderation balls 34 and 36 are moved into the recessed portions. It enters C' and becomes the other moderation, becoming the moderation point C. Furthermore lever 2
3 in the same direction, the moderation balls 34 and 36 will come out of the recess C' and move the movable contact plate 27 to the position shown in position L _M in FIG. 6e. This is the nodal point E, and by releasing the lever 23, the lever 23 returns to the position corresponding to the stable point A. However, at this time, the movable contact plate 27 returns only to the position of the moderation point C due to the moderation peak C'.

[Table] Therefore, the contact state between the contacts of the fixed contact plate at the stable point A and the nodal points B, C, D, and E is as shown in the table above. Note that at stable point A, the node remains at the position of node B or C, so in reality, the contact state between the contacts at point B or C is maintained, but this is shown blank in the table. be. Also, the numbers in parentheses in the switching position column indicate the positions of the stability point and the nodal point. Note that FIG. 6f shows the position of the lever 23, and the broken line indicates an unstable position.
Further, the arrow indicates the direction from the unstable position to the stable position. The operation of the direction indicator control circuit using the control switch S configured in this way will be explained. First, it is assumed that the lever 23 is at the stable point A, but returns from the moderation point B side. In this state, the contact relationship of the contact group of the fixed contact plate 26 is at the switching position R shown in the table.
(B) is in contact state. This state is the same as the state shown in FIG. 3, and this case corresponds to case (a) in the operation description of FIG. 3, and the same effect as in case (a) is obtained. Next, when the lever 23 is moved beyond the nodal point B to the nodal point D, the contact group of the fixed contact plate 26 will be in the contact state at the switching position R _M (D) shown in the table. Once this nodal point D is reached, the lever 23 is released and returned to the stable position A. In this state, the operation is the same as in case (b) of the operation description in FIG. 3, which corresponds to the case where the set switch 16 is momentarily turned on. Next, when the handle is operated and the handle is rotated clockwise, or when the handle is rotated clockwise and then counterclockwise, cases (c) and (d) in the operation explanation in Figure 3 correspond to cases (c) and (d) described above. (
D)
It will have the same effect as in the case of . Then the third
In order to carry out the operation (e) in the explanation of the operation shown in the figure, the lever 23 may be rotated to the moderation point C from the above-mentioned state. If the lever 23 is now moved from the above state to the moderation point C, the movable contact plate 27
moves to the L position shown in FIG. 6C, and during this time all the contacts of the fixed contact plate 26 are temporarily turned off, so that the operation (e) in the operation description of FIG. 3 is performed. Although the case of right turn has been described above, the same applies to the case of left turn, and detailed explanation thereof will be omitted. According to the control switch S as described above, the lever 2
There is an effect that the switch can be operated with one action of 3. The case where the latch relay is used in the control circuit of the direction indicator has been described above, but next, an example in which the latch relay is configured electronically will be described. FIG. 7 is a circuit diagram of an example of the present invention in which the latch relay is electronic. In FIG. 7, the latch circuit 15 is composed of a transistor Tr ₁ and a transistor Tr _2. When a set switch 16 connected to the base of the transistor Tr ₁ is turned on, the transistors Tr ₁ and Tr ₂ are turned on, and the base of the transistor Tr ₂ is turned on. The transistors Tr ₁ and Tr ₂ are turned off when the connected reset condition determination circuit 17 is turned on. On the other hand, 40 is a transistor Tr ₃ , Tr ₄ ,
A flash signal generation circuit consisting of Tr ₅ and relay 40'', in which relay contact 4 of relay 40''
0', and the voltage of the power supply 13 is applied to the turn signal lamps 5 and 6 through the turn signal switch 14. By turning on the set switch 16 momentarily, the transistor Tr ₁ is turned on, and as the transistor Tr ₁ is turned on, the transistors Tr ₂ and Tr ₃ are turned on, and the transistors Tr ₁ , Tr ₂ , and Tr ₃ are turned on. It remains on. When the transistor Tr ₃ is turned on, the transistors Tr ₄ and Tr ₅ are repeatedly turned on and off due to the time constant of the discharge circuit consisting of the capacitor C and the resistor R ₂ , and the relay 40'' turns on and off the relay contact 40' to generate a turn signal. Power supply 13 applied to lamp 5 or 6
Turns the voltage on and off. Furthermore, by turning on the reset condition determination circuit 17, transistors Tr ₂ and Tr ₃ are turned off.
At the same time, the transistor Tr ₁ is also turned off. Therefore, transistors Tr ₄ and Tr ₅ remain off,
The relay 40'' is de-energized and the relay contact 40' is turned off.Therefore, the turn signal lamp 5 or 6 is turned off.In this way, the latch circuit 15 is connected to the transistor _Tr1.
and an electronic circuit consisting of Tr ₂ . Next, a case where the control switch S is used as a switch for an automatic windshield lifting device of an automobile will be explained. In this case, in the circuit shown in FIG. 3, the turn signal lamp 5 is replaced by, for example, a raising circuit for a motor for raising and lowering the window glass, and the turn signal lamp 6 is replaced by, for example, a lowering circuit for the motor. Further, the turn signal flasher circuit 7 is removed and short-circuited. In addition, the handle rotation detection contacts 19 and 20 use contacts of a switch that is turned off when the window glass reaches the upper limit and a switch that is turned off when the window glass reaches the lower limit, respectively, instead of detecting the rotation of the handle. By doing this, the window glass can be raised, stopped, and lowered by operating in exactly the same way as when giving a direction indication. For example, when raising the window glass, the lever 23 is rotated until it reaches the moderation point D, and the window glass is raised and stopped at the upper limit. Moreover, if you want to stop the rise midway through, just rotate the lever 23 until it reaches the moderation point C. As explained above, the present invention has the effect of reducing the number of latch circuits and the number of relays compared to the conventional case, simplifying the circuit, and In direction indicating devices, the turn signal switch can be installed separately from the steering wheel, and for the control switch, the turn signal contact and reset (cancel) switch can be operated on the same lever, improving operability and safety. Improved sex,
In addition, the configuration is simple and inexpensive due to the clustering of the reset contact, set contact, and turn signal contact, and the next operation can be performed by returning the lever to the neutral stable position regardless of the contact position. It also has the effect of making it easier to do.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional direction indicating circuit, FIG. 2 is a block diagram of a direction indicating circuit according to an embodiment of the present invention, and FIG. 3 is a circuit diagram of a direction indicating circuit according to an embodiment of the present invention. FIG. 4 is an exploded perspective view of a control switch according to an embodiment of the present invention, FIG. 5 is a cross-sectional view of the same in an assembled state, and FIG. 6 is a configuration of an example of the contact points of the control switch shown in FIGS. 4 and 5. 7 are circuit diagrams of a direction indicating circuit according to another embodiment of the present invention. 5 and 6... Turn signal lamp, 7...
Flasher circuit, 14...Turn signal switch, 15...Latch circuit, 16...Set switch, 17...Reset condition determination circuit, 18...Reset switch, 19 and 20...Handle rotation detection switch, 21...Outer case , 23...Lever, 24...Ball, 25...Spring, 26
...Fixed contact plate, 27...Movable contact plate, V ₁ to _{V 6}
... Contacts, T _R , T _L , T _B , S _B , S _R , R _L , R _C and
R _R ...Contact.

Claims (1)

[Scope of Claims] 1. First and second positions facing each other with a neutral stable position at the center, a third position outside the first position, and a third position outside the second position. a lever that moves to a fourth position provided in the first to fourth positions and automatically returns to the first to fourth positions; first and second contacts that switch in the third or fourth position; and third and fourth contacts that switch in the third or fourth position; and the third and fourth contacts that switch in the third or fourth position by operating the lever. on-state holding means that electrically maintains the on-state when the third and fourth contacts are turned on; and when the on-state holding means is operating, the lever is operated in the opposite direction. and a release means for turning off the on-state holding means when the first or second contact is on.