JPH0236415B2 - RITORAKUTABURUHETSUDORAITOKUDOSEIGYOSOCHI - Google Patents

Abstract

PURPOSE:To prevent careless or erroneous operation which is against the operator's intention, by limiting the feed of an operation instructing signal for moving headlights up and down to a motor drive circuit when the use of a timer means. CONSTITUTION:A retractable headlight drive control device provided with a motor drive means 1 including a motor for moving headlights up and down, comprises an operation instructing signal forming means 2 for forming operation instructing signals composed of rising and lowering instructing signals U, D, and a connecting path forming means 3 operated in synchronization with the drive of a motor 10, for delivering either one of these operation instructing signals to a drive means 1 in accordance with the position of the headlights. Both means 1, 3 are connected with each other through the intermediary of a switch means 4. Further, when the above-mentioned forming means 2 forms either one of the operation instructing signals, a timer means 5 allows the switch means 4 to be turned on for a predetermined time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a so-called retractable headlight in a vehicle, particularly an automobile, in which the headlight can be raised from the vehicle body or lowered and stored within the vehicle body. The present invention relates to a retractable headlight drive control device that controls the raising and lowering operations of a retractable headlight to prevent it from being unintended by the operator.

(Prior Art) FIG. 4 shows a conventional retractable headlight drive control device. For example, a similar device is disclosed in Japanese Patent Application Laid-open No. 130753/1983. In the figure, reference numeral 401 indicates various operation switch contacts related to the light, and 1A is for turning on and off the headlight. When the light is turned on, the headlight rises, and when the light is turned off, the headlight is lowered. 1B is for turning on and off an auxiliary light (so-called small lamp, etc.). 1C
The switch switches the beam direction of the headlight, and generally, when the contact is off, it is a low beam, and when the contact is on, it is a high beam. 1D responds to a so-called passing operation; if the headlight is lowered, the light will rise and the light will turn on for a predetermined short time. Reference numeral 402 denotes a unit that gives operation commands to the headlight based on these switch operations, and sends out various command signals 1a, 1b, 1c through a control circuit (not shown). It also has a contact point 2A for commanding the rise and fall of the headlight. This contact 2A is activated by the operation of the headlight lighting operation switch 1A and the passing operation switch 1D, and commands the headlight to be lowered on the terminal d side and to be raised on the terminal u side. Reference numeral 10 denotes a motor for raising and lowering the headlight, and according to this conventional example, it rotates in only one direction and forms part of a motor mechanism that, in combination with a link mechanism, raises and lowers the headlight.
7 is a retractable operation switch placed in the vehicle interior, and is a manual switch for raising or lowering the headlight regardless of whether the light is on or off; terminal d lowers the headlight;
From the side, command the hetdrite to rise. 8 and 9 are
This is a diode that allows the rising command signal U or the falling command signal D formed by the contact 2A or the switch 7 to pass through, and is for blocking reverse current and protecting the circuit. 3 is a connecting device for forming a connection path for the ascending command signal U and the descending command signal D.
This connecting device 3 is arranged 180 degrees apart from a disc 30 made of a conductive material and having a notch 30A that rotates in synchronization with the drive motor 10, and receives an ascending command signal U and a descending command signal D, respectively. It has contacts 31 and 32 and a contact 33 for forming a conductive path to the motor side. 11 is a relay for driving the motor 10, and a contact piece 12
When is on the u side, the motor 10 is energized and the light goes up, but when it is on the d side, the motor 10 is energized and the light goes up.
is not activated and the light is in the lowered position.

Next, the operation of this conventional device will be explained.

In the illustrated state, the light is in the lowered position, and at this time, the notch 30A of the disc 30 of the connecting device 3 is at the position of the contact 32. Therefore, the descending command signal D
cannot pass through the connecting device 3. Further, the ascending command signal U is transmitted to the disk 30, the contactor 31,
33 are electrically connected to each other, the signal U can pass through the connecting device 3, but the signal U is not generated by either the contact 2A or the switch 7. Therefore, the motor 10 does not rotate and the headlight maintains its lowered state. Here, if you operate the manual switch 7 and connect to the u side, the ascending command signal U
is formed, and this ascending command signal U is transmitted to the disk 30,
Since the contacts 31 and 33 are electrically connected to each other, they pass through the connecting device 3. The ascending command signal U that has passed through the connecting device 3 energizes the relay 11 and switches the contact piece 12 to the u side. Therefore, the motor 10 begins to rotate and the light begins to rise. At this time, since the disc 30 of the connecting device 3 also rotates in the direction of arrow R, the notch 30A of the disc 30 reaches the position of the contact 31 at a position rotated 180 degrees from the position shown in the drawing, and the ascending command signal U is Be cut off. That is, the light has completed its ascent and is in a state of waiting for the descending command signal D. The operation when the descending command signal D is generated is the same as described above and can be easily understood.

(Problems to be Solved by the Invention) Such retractable headlights generally have an operating knob in the engine room, and the light may become unable to rise due to a motor circuit failure or freezing. It is now possible to raise and lower the light by manually operating the knob (for example, in the 1980s).
146549 etc.). However, in the conventional device as described above, when this type of operation knob is rotated, the disc 30 of the connecting device 3 also rotates. Furthermore, when the power is on, the disk 30 comes into contact with any of the contacts, so the motor 10 starts rotating. In this case, if the disk 30 rotates in the opposite direction to the arrow R direction by operating the knob, there is a possibility that the motor 10 is energized and starts rotating in the arrow R direction. Furthermore, even if the disk 30 is rotated in the direction of arrow R by operating the knob, there is a possibility that the motor 10 will be energized and start rotating in the direction of arrow R. but,
The person who operated the knob did not intend for the motor to rotate in this manner, and it is undesirable for unexpected motor operation to place a burden on the motor and cause malfunctions such as damage to the motor. Further, although there is no problem if the power is turned off when operating the knob, it is desirable for safety to be able to deal with forgetting to turn off the power.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a retractable headlight drive control device that does not cause any careless operation contrary to the operator's intention even if the power is not turned off.

(Means and effects for solving the problem) In order to achieve this object, the retractable headlight drive control device according to the present invention uses a motor drive having a motor mechanism that rotates in one direction to move the headlight up and down. means 1; actuation command signal forming means 2 for forming an actuation command signal consisting of a rise command signal U or a fall command signal D for raising or lowering the headlight; connection path forming means 3 for supplying any of the actuation command signals to the motor driving means 1 in response to the position;
This connection path forming means 3 and the motor driving means 1
a switch means 4 that is connected between the two and opens and closes the passage of the actuation signal; and when the actuation command signal forming means 2 forms any of the actuation command signals, the switch means 4 is turned on for a certain period of time. The operation of the light is terminated by the time-limiting means when an operation command signal is supplied to the motor driving means through the connecting path forming means which rotates in one direction as the headlight moves up and down. Allow only a certain amount of time to pass. With this configuration, the light drive motor operates only for a necessary fixed period of time, and as long as an operation command signal is not generated, even if the connection state of the connection path forming means is changed,
The light drive motor is no longer energized.

In addition, hereinafter, in this specification, "ascending" and "descending" include all cases where the headlight is protruded from the vehicle body and when it is retracted into the vehicle body, respectively, and whether the operation of the headlight is due to rotational movement or not, It does not matter whether it is due to parallel movement or not. In addition, the headlight is fixed,
For convenience, even when only the headlight cover opens or closes, this is considered to be the raising or lowering of the "headlight." Furthermore, the storage of the headlight into the vehicle body by "lowering" includes cases where a portion of the headlight is exposed during storage.

(Embodiments of the invention) Examples of the invention will be described below with reference to the accompanying drawings. Note that the same reference numerals in each figure indicate similar objects.

FIG. 1 is a system diagram of a retractable headlight drive control device according to an embodiment of the present invention. In the figure, 1 is a motor drive means having a light drive motor 10 and a relay 11 for energizing this motor 10.
It has a contact piece 12 that controls energization. Contact piece 12
When is on the a side, the motor 10 is energized, and when it is on the b side, both ends of the drive terminals of the motor 10 are commonly connected to the ground side. Therefore, when the contact piece 12 switches to the b side while the motor 10 is rotating,
The motor 10 rapidly enters a stopped state due to dynamic braking. 2 is an operation command signal forming means, which is a contact point 2A of the operation command unit similar to that explained in the conventional device.
and a light operation switch 7 in the vehicle interior, and can generate an up command signal U and a down command signal D. 3 is a connection path forming means for supplying either the operation command signal U or D to the motor drive means 1 side. This connection path forming means 3 is connected to the drive motor 1
A conductive plate 30 that rotates in synchronization with 0 and has a notch 30A in a part, a first contact 31 that supplies an ascending command signal U, and a second contact 32 that supplies a descending command signal D, The contactor 33 is connected to the relay 11 side of the motor drive means 1.

Reference numeral 4 denotes a switch means interposed in a passage path 40 for an actuation command signal that connects the conductive path forming means 3 and the relay 11, and opens and closes this signal passage 40 to control the motor driving means 1 for actuation command signals U and D. control the supply cutoff to This switching means 4 includes a signal path 4
PNP with its emitter and collector connected to 0
A type transistor 41, and an NPN type transistor 42 whose emitter is grounded, which drives the base of the transistor 41.

Reference numeral 5 denotes a time limit control means for controlling the ON time of the switch means 4. This time limit control means 5 comprises a multivibrator 51 whose input side is connected to a signal path 21 for supplying a rise command signal U, an AND gate 55, and an OR gate 57 connected between these two elements 51 and 55. 1, a multivibrator 52 whose input side is connected to the signal path 22 for supplying the descending command signal D, an AND gate 56, and an OR gate 58 connected between these two elements 52, 56. It consists of a system. The multivibrators 51 and 52 are monostable multivibrators, and output logic 1 only for a certain period of time after the arrival of the operation command signals U and D. This certain period of time is longer than the time required for the light to start and finish its rising or falling motion (generally 1 to 2 seconds), for example 3 seconds.
Seconds. The outputs of the multivibrators 51 and 52 are connected to one input end of AND gates 55 and 56, respectively, via diodes 57A and 58A forming OR gates 57 and 58, respectively.
The other inputs of the AND gates 55 and 56 are common to the inputs of the multivibrators 51 and 52, respectively, and are actuation command signals U and D, respectively. Also,
The anodes of the other diodes 57B, 58B constituting the OR gates 57, 58 are commonly connected to the signal path 40 between the relay 11 of the motor drive means 1 and the transistor 41 of the switch means 4.

Next, the operation of this embodiment will be explained.

In the illustrated state, the contact 2A of the operation command signal forming means 2 and the operation switch 7 are both located on the d side, and the contact 32 of the connection path forming means 3 for supplying the lowering command signal D is connected to the conductive plate 30. not in contact with. Therefore, neither of the multivibrators 51 and 52 is activated, the switch means 4 is in an OFF state, and the motor 5 does not rotate. That is, the connection path forming means 3 also remains stationary at the illustrated position, and the light is in a lowered state. Here, the contact 2A of the operation command signal forming means 2 or the switch 7 is
to the side, and generate the ascending command signal U. This ascending command signal U is supplied to the contactor 31 of the conductive path forming means 3 and the multivibrator 51 via the signal path 21. Multivibrator 5
1 is turned on by the rise of this signal U. Therefore, both of the two inputs of the AND gate 55 become a logic 1, and the output of the AND gate 55 becomes a time logic 1 determined by the time constant of the multivibrator 51. Therefore, during this time, the transistors 42 and 41 are in the on state, and the rising command signal U
However, via the connection path forming means 3 and the signal path 40,
Activate relay 11. For this reason, relay contact 1
2 switches to the a side, the motor 10 is energized and starts rotating, and the light starts rising. At the same time, the conductive plate 3 of the connection path forming means 3
0 is also rotated in the direction of arrow R, and when rotated 180 degrees, the notch 30A is located at the contact 31. For this reason,
Although the supply of the raising command signal U to the relay 11 side is cut off and the rotation of the motor 10 is stopped, at this time the raising of the light has been completed and the state of raising the light is maintained. Notch 30 of this conductive plate 30
The multi-vibrator 51 continues to be in the on state during the time when A reaches from the contact 32 to the contact 31,
It is set to turn off immediately after that.
Therefore, when the light has finished rising and the motor 10 has stopped, the switch means 4 is also turned off.
Therefore, even if the conductive plate 30 of the connection path forming means 3 is rotated by operating a knob or the like, the signal path 40 is blocked by the switch means 4, so the relay 11 is energized and the motor 10 is activated. It never starts.

When the descending command signal D is generated from the rising state of the light, the multi-vibrator 52 remains on for a certain period of time, and the motor 1
Rotate 0 and the light will descend.

Here, let us consider the operation when the light switch is improperly operated, for example, when commands to raise, lower, and raise are repeated before the light is fully raised from the illustrated state. FIG. 2 shows the case where the ascending command is finally given as U, and FIG. 3 shows the case when the descending command is finally given. In each figure, a is the operation command signal U, D, and for convenience, the descending command is set to negative polarity, but it has nothing to do with the actual polarity. Also, drawing b
indicates the output of the multivibrator 51 with the output duration T0, c indicates the output of the AND gate 55, d indicates the output of the multivibrator 52 with the output duration T0, and e indicates the output of the AND gate 56. The signs of the output signals are the same. As will be explained in detail below, it should be noted that the motor 10 operates only when the outputs of the AND gates 55 and 56 are present (logic 1).

First, in the case of FIG. 2, the multi-vibrator 51 is activated by the first raising command U at time T1, and the light starts to rise as described above. At this time, the conductive plate 30 also begins to rotate in the R direction.
In the middle of this (while the multi-vibrator 51 is on)
Assuming that the descending command D is generated at time T2, the output of the AND gate 55 becomes logic 0 because the ascending command signal U disappears, and the motor 10 stops midway. On the other hand, the multivibrator 52 of duration T0 is activated. For this reason, the AND gate 56
The output becomes logic 1 and the motor 10 rotates, but
Since the rising command U is further generated at time T3, the output of the AND gate 56 becomes logic 0. For this reason,
At time T3, the multivibrator 51 is restarted (indicated by the signal 51-2), so that the output of the AND gate 55, indicated by the signal 55-2 in FIG. 2b, is generated again. Therefore, in the end, AND gates 55, 56
The time during which the switch means 4 is in the ON state due to the output of is the total time of the signals 55, 55-2 in FIG. 2c and the signal 56 in FIG. 2e. This time is sufficiently longer than the time it takes for the conductive plate 30 to rotate 180 degrees. Therefore, the connection path forming means 3 stops supplying the ascending command signal U at the position where the conductive plate 30 has rotated 180 degrees, and the light completes its ascending. Next, in the case of FIG. 3, the first ascending command U at time T1
As a result, the multi-vibrator 51 is activated, and the light begins to rise as described above. At this time,
The conductive plate 30 also begins to rotate in the R direction. If the descending command D is generated at time T2 during this period (while the multi-vibrator 51 remains on), the AND gate 55
The output becomes logic 0 and the motor 10 stops midway. On the other hand, multivibrator 5 with connection time T0
2 starts. Therefore, the output of the AND gate 56 becomes logic 1 and the motor 10 rotates. Since the lowering command D continues thereafter, the output of the AND gate 56 continues for the duration time T0 of the multivibrator 52, and the motor 10 rotates. Therefore, the time during which the switch means 4 is in the ON state due to the outputs of the AND gates 55 and 56 is the total time of the signal 55 shown in FIG. 3c and the signal 56 shown in FIG. 3e. This time is sufficiently longer than the time for the conductive plate 30 to rotate 180 degrees, and the operation command signal changes from the ascending command U to the descending command D during this period. Therefore, in order to deal with such situations,
If the duration of the multivibrators 51 and 52 is set to one rotation (360 degrees) of the conductive plate 30, the light once rises, then enters a descending state and completes its descent.

Various other operations, such as when a descending command is given from a light in an ascending state, or when descending, rising, and descending are repeated in a short period of time from a light in an ascending state, are similar to the above explanation, and may cause problems. No proper action occurs.

The present invention is not limited to the above embodiments and modifications, but within the technical scope of the present invention,
Various other embodiments and variations are possible;
Also, the fact that equivalent components can be exchanged means that
It will be clear to those skilled in the art. For example, instead of a monostable multivibrator, a counter can be used which is activated by an input signal and delivers an output for a predetermined period of time defined as a preset value.

(Effects of the Invention) As described above, the present invention limits the supply of the operation command signal to the motor drive circuit by the time limit means, thereby preventing improper operation of the manual knob or light operation switch. Also, it is possible to obtain a highly reliable retractable headlight drive control device that does not cause careless operation or malfunction contrary to the operator's intention.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a retractable headlight drive control device according to an embodiment of the present invention, FIGS. 2 and 3 are operation explanatory diagrams of a retractable headlight drive control device according to an embodiment of the present invention, and FIG. 4 is an explanatory diagram of a conventional device. 1 is a motor drive means, 2 is an operation command signal forming means, 3 is a connection path forming means, 4 is a switch means, 5
is a time limit means, 10 is a drive motor, 11 is a relay,
21 and 22 are signal paths, 30 is a conductive plate, 3
1, 32, 33 are contacts, 40 is a signal path, 41,
42 is a switching element, 51 and 52 are multivibrators, 55 and 56 are AND gates, 57 and 5
8 is an OR gate, U is an ascending command signal, and D is a descending command signal.

Claims (1)

[Scope of Claims] 1. A motor drive means having a motor mechanism that rotates in one direction to move the headlight up and down, and an operation command signal consisting of a rise command signal or a fall command signal for raising or lowering the headlight. a connection path forming means that operates in synchronization with the motor mechanism and supplies one of the operation command signals to the motor drive means in response to the position of the headlight; a switch means connected between the means and the motor drive means for opening and closing a passage for the actuation command signal; and a switch means for opening and closing the passage of the actuation command signal, and switching the said switch means only for a certain period of time when the actuation command signal forming means forms any of the actuation command signals. A retractable headlight drive control device comprising: a time limit means for turning on the retractable headlight. 2. In the device according to claim 1,
A retractable headlight drive control device, wherein the motor mechanism includes a link mechanism that is driven by the motor and moves the headlight up and down. 3. The retractable headlight drive device according to claim 1 or 2, wherein the operation command signal forming means is an operation switch in the driver's seat or a connection means operated by the operation switch. Control device. 4. In the device according to claim 3,
A retractable headlight drive control device, wherein the connection means is a relay contact or a semiconductor switch. 5. In the device according to any one of claims 1 to 4, the connection path forming means comprises:
a conductive plate that rotates in synchronization with the motor and has a notch in a part; a first contact that supplies the ascending command signal; a second contact that supplies the descending command signal; A retractable headlight drive control device, characterized in that it is a rotary connection path forming unit, comprising a third contact for forming a command. 6. The device according to any one of claims 1 to 5, characterized in that the time limit means operates for a period longer than the time from the start to the completion of the raising or lowering operation of the headlight. Retractable headlight drive control device. 7. In the device according to claim 6,
A retractable headlight drive control device, wherein the time limit means is a monostable multivibrator. 8. In the device according to claim 6,
A retractable headlight drive control device, wherein the time limit means is a counter.