JPH0512276U - Signal converter for optical axis adjustment - Google Patents

Abstract

(57) [Abstract] [Purpose] When the leveling mechanism 21 having the motor M for tilting the headlight 22 up and down is remotely controlled by the operation signal output by the manual operation switch, the manual operation switch SW and the leveling mechanism 21 are used. (EN) Provided is a signal conversion device capable of increasing the number of wirings connecting between and. [Configuration] Manual operation switch SW and leveling mechanism 21
And the control circuit section 7a and the semiconductor switch circuit section 7b, which are operated by the signal from the comparison circuit section 8, are connected between and.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved device for converting an operation signal in a mechanism for sending an operation signal from a manual operation switch to an electric remote control type leveling mechanism to simplify wiring.

[0002]

[Prior Art]

 As a general rule, a headlight for an automobile is installed on the vehicle body with its optical axis leveled. For this reason, the headlights for automobiles are provided with a manual adjustment mechanism (aiming mechanism) for vertically adjusting the optical axis direction, so that the optical axis direction can be adjusted correctly in an automobile manufacturing factory or an automobile maintenance factory. Adjusted. However, even if the optical axis direction is horizontal in the standard state, if the state of the load changes, the suspension spring bends and the vehicle body tilts, causing the adjustment state to go wrong. For this reason, in addition to the above-mentioned manual aiming mechanism, an electric remote control type optical axis adjusting mechanism (leveling mechanism) is provided in the vehicle headlamp. For the reasons described above, the vehicle headlamp optical axis adjuster is equipped with a manual (mostly lead screw type) aiming mechanism and an electric (remote control type) leveling mechanism. FIG. 2 is a wiring diagram showing a conventional example of a system for operating the electric remote control type leveling mechanism 21. The indoor switch 4 has a four-position operation stage, switches the voltage Vcc of the battery BT, and supplies it to the leveling mechanism 21 via the 6p connector 6 by wiring corresponding to each position. The motor M is supplied with power from the battery BT via the relay RYD and the relay RYE. The relays RY D and RYE receive the signal sent from the indoor switch 4 through the position sensor 5 and cause the motor M to rotate forward and backward. The headlight 22 is tilted up and down about the pivot fulcrum 23 by the forward and reverse rotations of the motor M. The rotation patterns 5a and 5b of the position sensor 5 rotate in conjunction with the tilting. Each position of the indoor switch 4 and each electric wire for sending a signal output from 0, 1, 2, 3 is a diode D.₁, D₂, D₃, D_FourThrough the contact K₁, K₂, K₃, K_FourIt is connected to the. As shown in the drawing, when the indoor switch 4 is in the 0 position, the position sensor 5 is rotated counterclockwise all the way as shown in the drawing. Contact K in this state₁Is separated from the rotation pattern 5b, and when the rotation pattern 5b rotates clockwise from the position shown in the drawing, the contact K₁Comes into contact with the rotating pattern 5b and conducts electricity. Contact K in this state₂Is in contact with and electrically connected to the rotation pattern 5a, and the rotation pattern 5a is rotated together with the rotation pattern 5a in the clockwise direction in the figure to rotate the contact K.₂Is relatively disengaged from the rotation pattern 5a when it reaches the position B, and further contacts with the rotation pattern 5b when it further rotates. Contact K in this state₃Is in contact with and electrically connected to the rotation pattern 5a, and the rotation pattern 5a rotates together with the rotation pattern 5b in the clockwise direction in the figure, and the contact K₃Is relatively disengaged from the rotating pattern 5a when it reaches the C position, and is further contacted with the rotating pattern 5b so as to be electrically connected. Contact K in this state_FourIs in contact with and electrically connected to the rotation pattern 5a, and the rotation pattern 5a rotates in the clockwise direction in the figure together with the rotation pattern 5a and the contact K_FourWhen it reaches the D position relatively, it is disengaged from the rotation pattern 5a, and even if it is further rotated, it does not come into contact with the rotation pattern 5b and conduct. In the state of FIG. 2, the indoor switch 4 is in the 0 position, and the headlight 22 is tilted to the corresponding downward posture. When tilted upward from this downward state, the rotation patterns 5a and 5b of the position sensor 5 are interlocked so as to rotate clockwise. In the state of FIG. 2, the voltage Vcc of the battery BT is switched by the indoor switch 4 and the diode D₁Through the contact K₁To the contact K ₁ Is separated from the rotation pattern 5b and is not conducted, the motor M is not energized. That is, since neither the electromagnetic coil of the relay RYD nor the electromagnetic coil of the relay RYE is energized, neither the terminal d of the relay RYD nor the terminal e of the relay RYE is conducted to the battery BT, the motor M is stopped, and the headlight 22 is turned off. Do not tilt. When the indoor switch 4 is operated to the 1 position from this state, the voltage Vcc of the battery BT is changed to the diode D. ₂ Through the contact K₂To the negative side of the battery BT through the electromagnetic coil of the relay RYE via the rotation pattern 5a. As a result, the relay RYE is activated, the voltage Vcc of the battery BT is supplied to the terminal e, the motor M is activated, the headlamp 22 is tilted upward, and the position sensor 5 is rotated clockwise in the figure. Be done. This rotation causes contact K₂Contact the contact point K when the B moves relative to the rotation pattern 5a and reaches the B position.₂Is deviated from the rotation pattern 5a, the terminal e of the relay RYE is cut off from the supply of the voltage Vcc of the battery BT, the motor M is stopped, and the headlight 22 is stopped in the tilted posture corresponding to the position 1. When the indoor switch 4 is operated to the 2 position from this state, the voltage Vcc of the battery BT is changed to the diode D₃Through the contact K₃To the minus side of the battery BT through the electromagnetic coil of the relay RYE via the rotation pattern 5a. As a result, the relay R YE operates, the voltage Vcc of the battery BT is supplied to the terminal e, the motor M operates, the headlight 22 is tilted upward, and the position sensor 5 rotates clockwise in the figure. Can be moved. This rotation causes contact K₃Is moved relative to the rotation pattern 5a and reaches the position B, the contact K₃Is deviated from the rotation pattern 5a, the terminal e of the relay RYE is cut off from the supply of the voltage Vcc of the battery BT, the motor M is stopped, and the headlight 22 is stopped in the tilted posture corresponding to the position 2. When the indoor switch 4 is operated to the 3 position from this state, the voltage Vcc of the battery BT is changed to the diode D._FourThrough the contact K_FourTo the minus side of the battery BT through the electromagnetic coil of the relay RYE via the rotation pattern 5a. As a result, the relay RYE is activated, the voltage Vcc of the battery BT is supplied to the terminal e, the motor M is activated, the headlamp 22 is tilted upward, and the position sensor 5 is rotated clockwise in the figure. Be punished. This rotation causes contact K_FourIs moved relative to the rotation pattern 5a and reaches the position B, the contact K_FourIs deviated from the rotation pattern 5a, the terminal e of the relay RYE is cut off from the supply of the voltage Vcc of the battery BT, the motor M is stopped, and the headlight 22 is stopped in the tilted posture corresponding to the position 3. The thermistor TH shown in the figure is for preventing an excessive current when there is a possibility that an excessive current will flow through the motor M and burn the motor due to some circumstances.

[0003]

[Problems to be solved by the device]

 According to the conventional optical axis adjusting mechanism (leveling mechanism) shown in FIG. 2, the indoor switch 4 can remotely control the motor M to vertically tilt (level) the headlight 22. The indoor switch 4 is connected to the motor M through six wires via a 6p connector 6. Generally, one car is equipped with two headlights, so the number of leveling wires per car is 6 × 2 = 12, which not only increases the wiring cost but also reduces the weight of the car body. This is one of the causes of increasing the fuel consumption rate by increasing it. The present invention has been made in view of the above circumstances, and a signal converter for optical axis adjustment that can significantly reduce the number of wires by converting a signal of a manually operated switch given to a leveling motor of a headlight. The purpose is to provide.

[0004]

[Means for Solving the Problems]

 In order to achieve the above purpose (signal conversion for simplification of wiring), the signal conversion device according to the present invention is provided with a manually operated switch having a plurality of voltage divider output terminals and a tilted headlight. For automobiles, which includes a position sensor that rotates with opening and closing a plurality of sets of contacts, a motor that tilts the headlamp up and down, and a relay unit that controls the operation of the motor according to the output signal of the position sensor. In the optical axis adjusting device for a headlight, between the position sensor and the manual operation switch, a comparison circuit unit that determines an output signal of the manual operation switch, and a control circuit unit that is operated by the comparison circuit, A semiconductor switch circuit section that is turned on / off by an output signal of the control circuit section is connected via an interconnection, and the control circuit section is an inverter circuit that controls the signal of the comparison circuit section. Characterized in that the more and Exclusive NOR circuit.

[0005]

[Action]

 According to the above configuration, one wire for positive power supply and one wire for negative power supply (two wires in total) are provided between the manually operated switch and the comparison circuit section, and one wire for transmitting a plurality of types of partial pressure extraction signals And a total of 3 is enough. The divided voltage output signal is selected into a plurality of signals by the comparison circuit section, and the motor M is remotely controlled via the control circuit section and the semiconductor switch circuit section.

[0006]

【Example】

 FIG. 1 is a wiring diagram of a leveling mechanism equipped with an embodiment of a signal converter according to the present invention. FIG. 1 shows an example in which the present invention is applied to the conventional example shown in FIG. 2 described above. The left part of the 6p connector 6 in FIG. 2 and the left part of the 6p connector 6 in FIG. The part has the same configuration. The operation switch section 9 shown in FIG. 1 is connected to the comparison circuit section 8 via a 3p connector 10, and three wirings 12, 13 and 14 are connected between them. The wiring 12 is a positive wiring of the battery BT, and the wiring 13 is a negative wiring. The switch SW is provided with voltage dividing output terminals 0, 1, 2 and 3, and a voltage dividing resistor R is provided between these terminals.₃, R₂, R₁Is connected, and a voltage signal divided according to the operation position of the switch SW is output. Output voltage at 0 position of this switch is V₀And the output voltage at 1 position is V₁, 2 position output voltage is V₂, Output voltage of 3 position is V₃Then, V₀= 0, V₁= R₃・ Vcc / (R_Four+ R₃), V₂= (R₂+ R₃) ・ Vcc / (R_Four+ R₂+ R₃), V₃= (R₁+ R₂+ R₃) ・ Vcc / (R_Four+ R₁+ R₂+ R₃ ). However, Vcc is the power supply voltage of the battery BT. The output voltage V divided by the switch SW as described above₀, V₁, V₂, V₃Is input to the three comparators CMP1, CMP2, CMP3 that form the comparison circuit unit 8. The reference voltages of these comparators are respectively set to Vth₁, Vth₂, Vth₃Then, Vth₁= R₈・ Vcc / (R_Five+ R₆+ R₇+ R₈), Vth₂= (R₇+ R₈) ・ Vcc / (R_Five+ R₆+ R₇+ R₈), Vth₃= (R₆+ R₇+ R₈) ・ Vcc / (R _Five + R₆+ R₇+ R₈). Where V₀<Vth₁<V₁<Vth₂<V₂<Vth₃<V₃Each reference voltage and output voltage are set in advance so that EXN1 and EXN2 are exclusive NOR gates. The output of the comparator CMP3 is to the input side pin B'of EXN2, the output of the comparator CMP2 is to pin A'of EXN2 and the pin B'of EXN1, and the output of comparator CMP1 is to the pin A'of EXN1. Is entered. INV is an inverter, and Q1 to Q4 are transistors, respectively. Hereinafter, the positive voltage Vcc of the battery BT may be represented by H and the negative potential may be represented by L. Next, the operation in each operation state will be described. (When the switch SW is in the 0 position) V as described above₀<Vth₁<Vth₂ <Vth₃Therefore, the outputs of the comparators CMP1 to CMP3 are all H, and H is transmitted to all inputs of INV, EXN1, and EXN2. Therefore, the outputs of EXN1 and EXN2 become H as shown in Table 1 below.

[0007]

[Table 1]

Therefore, H is transmitted to the bases of the transistors Q2 and Q3, respectively. Since these transistors Q2 and Q3 are PNP type transistors, when the potential between the base and the emitter is equipotential, it is turned off between the collector and the emitter, and when the potential difference is Vbe or more, it is turned on. Therefore, since H is transmitted to the bases of the transistors Q2 and Q3, both Q2 and Q3 are OFF. Similarly, since the output of the comparator CMP3 is also H, the transistor Q4 is also OFF. On the other hand, the output of INV is L as shown in Table 2 below, because the comparator CMP1 is at H, and this is given to the base of the transistor Q1.

[0009]

[Table 2]

Since the transistor Q1 is a PNP type transistor, the collector-emitter is turned on when a potential difference of Vbe or more is generated between the base-emitter. Thus the transistor Q1 is turned ON, but Vcc is transmitted to the emitter → the collector → the diode D ₁ → contact K ₁ of the transistor Q1, since said contact K ₁ is not in contact with any of the rotating pattern 5a, 5 b The relays RYD and RYE are not reached. Therefore, the motor M does not operate. In this state, the headlight 22 is tilted downward. The output voltage of the switch SW becomes V ₁ (when the switch SW is operated from the 0 position to the 1 position). As described above, since V ₁ > Vth ₁ , the output of the comparator C MP1 becomes L. Since V ₁ <Vth ₂ <Vth ₃ as described above, the outputs of the comparators CMP2 and CMP3 remain H. Then, since the output of CMP1 becomes L, the output of INV becomes H as shown in Table 2 above, and the transistor Q1 is turned off. On the other hand, since the outputs of the comparators CMP2 and CMP3 remain H, the output of EXN2 does not change, the transistor Q3 remains OFF, and the transistor Q4 remains OFF. Further, the B'pin input of EXN1 is the output H of the comparator CMP2. The A'pin input of EXN1 becomes L because the output of the comparator CMP1 becomes L (see Table 1), and the transistor Q2 turns ON. Transistor Q2 is turned ON Vcc is electrically connected to the rotation pattern 5a through the emitter → collector → the diode D ₂ → contact K ₂ of the transistor Q2, the electromagnetic coil of the relay RYE is created dynamic, contact e of the relay RYE within NO side Switch. As a result, one end of the motor M 1 is conducted to the plus side of the power source BT via the contact e, and the other end is conducted to the minus side of the power source BT via the contact point d and the thermistor TH. In this way, the motor M is energized to tilt the illumination lamp 22 in the upward direction, and the position sensor 5 rotates in the clockwise direction in the drawing. Contact K ₂ is moved from a relatively A position to the B position by the rotation, the motor M said contact K ₂ when it becomes B position becomes relay RYE off the rotating pattern 5a is inoperative is energized Shut off and stop. As a result, the headlight 22 stops at the optical axis angle position corresponding to one position of the switch SW. (When the switch SW is operated from the 1-position to the 2-position), the output voltage of the switch SW becomes V ₂ , and since V ₂ > Vth ₂ > Vth ₁ , the output of the comparator CMP2 becomes L. The output of the same CMP1 has already become L, and the output of the same CMP3 remains H (since V ₂ <Vth ₃ ). Then, since the output of CMP1 is L, the transistor Q1 remains OFF, and since the output of CMP3 is H, the transistor Q4 remains OFF. On the other hand, since both the A'pin and B'pin inputs of EXN1 become L, its output becomes H (see Table 1). Therefore, the transistor Q2 is turned off. In this state (position 1), the B'pin input of EXN2 remains H, but the output of EXN2 becomes L (see Table 1) because L is input to the A'pin input, and transistor Q3 is turned on. To do. Transistor Q3 is O N Then Vcc is the relay RYE is created dynamic is conducted to the relay RYE via emitter → collector → the diode D ₃ → Proximity K ₃ → rotation pattern 5a of the transistors Q3, contact e is switched to the NO side .. For this reason, the motor M is operated, the headlight 22 is further tilted upward, and the position sensor 5 is rotated clockwise. When the position sensor 5 rotates clockwise, the contact K ₃ moves counterclockwise relative to the rotation pattern 5a, and when the position C is reached, the contact K ₃ is disengaged from the rotation pattern 5a and the power supply is cut off. The contact point e is switched to the NC side when it is not activated, and the power supply to the motor M is cut off. The motor M that has been cut off from the power supply is stopped, and accordingly, the headlight 22 is stopped at the optical axis angle position corresponding to the two positions of the operation switch SW. (When the switch SW is operated from the 2 position to the 3 position) The output voltage of the switch becomes V ₃ , and since V ₃ > Vth ₃ > Vth ₂ > Vth ₁ , the output of the comparator C MP3 becomes L. Since the outputs of the comparators CMP1 and CMP2 have already become L, the transistors Q1 and Q2 remain off. Further, when the output of the comparator CMP3 becomes L, both the A'pin and B'pin of EXN2 become L, so the output of the EXN2 becomes H (see Table 1) and the transistor Q3 is turned off. At the same time, the base of the transistor Q4 connected to the B'pin becomes L and the transistor Q4 is turned on. When Q4 is turned on, Vcc is conducted to the relay RYE via the emitter of the transistor Q4 → collector → diode D ₄ → contact K ₄ → rotation pattern 5a. In this way, the relay RYE operates to energize the motor M, the headlight 22 is tilted upward, and the rotation pattern 5a rotates clockwise. Along with this, the contact K ₄ moves counterclockwise relative to the rotation pattern 5a, and when it reaches the position D, it comes off the rotation pattern 5a. Therefore, the relay RYE is deactivated, the contact e is switched to the NC side, the power supply to the motor M is cut off, and the headlamp 22 stops at the optical axis angle position corresponding to the three positions of the operation switch SW. In this example, the optical axis angle position corresponding to the 3 position is the position tilted to the uppermost position. (When the switch SW is operated from the 3 position to the 0 position) The output voltage of the switch SW is V ₀ , and V ₀ <Vth ₁ <Vth ₂ <Vth ₃ is satisfied. Therefore, the outputs of the comparators CMP1 to CMP3 are all H. Become. As a result, the transistors Q2 to Q4 are turned off and the transistor Q1 is turned on. In this way, Vcc is transmitted to the relay RYD through the transistor Q 1 → diode D ₁ → contact K ₁ → rotation pattern 5b, the relay RYD operates, and the contact d is switched to the NO side. As a result, the plus voltage Vcc of the power source is conducted to the motor M. In this case, compared to the case where the relay RYE operates as in the above-described operation states, when the relay RYD operates like this time, the energizing direction of the motor M becomes opposite, and the motor M reverses. Tilt the headlight 22 downward. Along with this, the position sensor 5 and the rotation patterns 5a and 5b rotate counterclockwise. Rotation pattern 5a, the counterclockwise rotation of 5b, the contact K ₁ ~K ₄ is equivalent to moving in the clockwise direction with respect to the rotation pattern 5a, 5b. By this clockwise movement, when the contact K ₁ reaches the position A as shown in the figure, it disengages from the rotation pattern 5b and the conduction to the relay RYD is cut off. Therefore, the contact point d is switched to the NC side, the power supply to the motor M is cut off, and the motor M stops. In this way, the headlight 22 stops at the optical axis angle position corresponding to the 0 position of the operation switch SW. In this way, in this embodiment, the signal emitted from the operation switch section 9 is sent to the comparison circuit section 8 through the 3p connector 10 through the three wirings 12, 13, and 14. To identify the signal and operate the control circuit section 7a and the semiconductor switch circuit section 7b to correspond to each of the four positions 0 to 3 of the manual operation switch SW, and the optical axis of the headlight 22. You can adjust the direction.

[0011]

[Effect of the device]

 As described above, when the present invention is applied, a plurality of voltage signals output from the manual operation switch can be transmitted by three wires, and the optical axis of the headlight can be adjusted in multiple stages. By simplifying (reducing the number of vehicles), manufacturing costs can be reduced and the weight of automobiles can be reduced.

[Brief description of drawings]

FIG. 1 is a wiring diagram of an optical axis adjusting mechanism equipped with an embodiment of a signal converter according to the present invention.

FIG. 2 is a wiring diagram of a conventional optical axis adjusting mechanism.

[Explanation of symbols]

4 ... Indoor switch, 5 ... Position sensor, 5a, 5b ... Rotation pattern, 6 ... 6p connector, 7 ... Relay circuit section, 8 ...
Comparing circuit section, 9 ... Operation switch section, 10 ... 3p connector, 12, 13, 14 ... Wiring, 21 ... Leveling mechanism,
22 ... headlight, 23 ... pivot fulcrum.

Claims (1)

[Scope of utility model registration request] 1. A manual operation switch having a plurality of partial pressure output terminals, a position sensor that opens and closes a plurality of sets of contacts by rotating with the vertical tilt of the headlight, and tilts the headlight up and down. In the optical axis adjusting device for a vehicle headlamp, which comprises a motor for controlling the motor and relay means for controlling the operation of the motor according to the output signal of the position sensor, between the position sensor and the manual operation switch, A comparison circuit section that determines the output signal of the manually operated switch, a control circuit section that is operated by the comparison circuit, and a semiconductor switch circuit section that is turned on and off according to the output signal of the control circuit section are inserted and connected. Further, the control circuit section comprises an inverter circuit for controlling the signal of the comparison circuit section and an exclusive NOR circuit, and a signal conversion signal for optical axis adjustment. Apparatus.