JPH022741B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an angle adjustment device for setting the irradiation angle of a lamp, and particularly to an angle adjustment device for an on-vehicle headlamp.

(Prior Art) For example, in a car, the front or rear of the car body rises or falls depending on the position and amount of load to be loaded, and the illumination angle of the headlamp relative to the road surface changes in front of the car. The higher the irradiation, the more dangerous it is because it dazzles the driver of an oncoming vehicle.

Therefore, we have developed an automatic lamp inclination angle adjustment device that automatically adjusts the lamp inclination angle according to the inclination angle of the vehicle body (fully automatic inclination angle adjustment), and a device that stretches a wire between the driver's seat and the lamp. Conventionally, manual lamp inclination angle adjustment devices for manually adjusting the lamp inclination angle (manual drive inclination angle adjustment) have been proposed.

However, the fully automatic tilt angle adjustment system is expensive because it is equipped with a sensor that detects the tilt angle of the vehicle body and is also equipped with a sophisticated arithmetic control system. It is also necessary to take sufficient measures to protect the electrical circuit elements. In addition, in the case of a manual drive inclination angle adjustable type, it is difficult to route the wire, and the wire is likely to break due to improper arrangement. Many mechanical elements are required to transmit the wire driving force. Also, sometimes only coarse adjustments can be made.

Therefore, an irradiation angle adjustment device that automatically sets the specified tilt angle, although the tilt angle is instructed by a person, is an intermediate method between the fully automatic adjustment and manual drive adjustment described above. It is proposed in the Publication No.

In the irradiation angle adjusting device disclosed in Japanese Patent Application Laid-Open No. 55-36152, a relay energizing circuit is constituted by the angle indication switch means 6 and the actual angle feedback switch means 7, and the relays 4 and 5 for forward and reverse energization are is inserted between the electric motor and the power source, and when the angle instruction switch means 6 differs from the actual angle, the electric motor is automatically energized in the forward/reverse direction to automatically change the actual angle to the indicated angle. I try to match it.

(Problem to be Solved by the Invention) When automatically setting the illumination angle of the lamp to the indicated position quickly, an electric circuit is required to drive the electric motor in the forward and reverse directions.
In the irradiation angle adjustment device disclosed in the publication, two relays 4 and 5 are used to selectively apply forward/reverse voltage to the electric motor.

By the way, the lamp driving load is relatively small.
Furthermore, since the rotation of the output shaft of the electric motor is decelerated by a reducer and applied to the tilting mechanism, the required torque of the electric motor is extremely small, allowing the use of a very small electric motor, and it does not take up much space around the lamp. Therefore, a small electric motor is preferable. It is therefore preferable for the electric motor energizing current to be small and for the electrical circuit to be as simple as possible and to have few electrical components, especially complex and expensive active components.

An object of the present invention is to provide an irradiation angle adjustment device that has a simple structure, does not substantially require active electric circuit elements such as relays, transistors, and ICs, and can adjust the inclination angle of a lamp with a light operation of an operator. purpose.

[Structure of the invention]

(Means for solving the problem) In the present invention, two terminals of the power supply (+12V, earth)
Intermediate voltage generating means R1, R2 consisting of resistors R1, R2 connected between the two terminals (+12 V, ground) and having an output end that outputs a voltage (+6 V) substantially intermediate between the voltages between the two terminals (+12 V, ground); Lamp support mechanisms 2 to 8 that are movably supported and change the inclination of the lamp 1 by mechanical displacement; electric motors that have one end connected to the output ends of intermediate voltage generation means R1 and R2 and that apply mechanical displacement to the lamp support mechanisms 2 to 8; 10; a plurality of contacts (N, 2 ₁ to 2 ₄ ) of a first set; and a first set of contacts (N, 2 ₁ to 2 ₄ ) electrically contacting at least one of the contacts (N, 2 1 to 2 4 ); 1 selector 9a and a contactor (N, 2
₁ to 2 ₄ ) and a first switch device 9 whose contact is switched by moving one 9a of the first selector 9a relative to the other (N, 2 ₁ to 2 ₄ ); and the first switch device A plurality of contacts (42n, 42n, 4) of a second set and a third set electrically connected to the plurality of contacts (N, 2 ₁ to 2 ₄ ) of the first set of 9;
2 ₁ to 42 ₄ and 44n, 44 ₁ to 44), a second selector 43 that can contact the second set of contacts (42n, 42 ₁ to 42 ₄ ), and a third set of contacts (44
n, 44 ₁ to 44 ₄ ), and electrical contact is switched by moving one of the second and third sets of contacts and selectors relative to the other. second switch device 40;
The contacts (N, 2 ₁ to 2 ₄ ) of one of the first switch device and the second switch device 9, 40 and the moving side 9a of the selector 9a are connected to the electric motor 10. The contacts (42
n, 42 ₁ to 42 ₄ ; 44 n, 44 ₁ to 44 ₄ ) and the moving side 43, 44 of the selectors 43, 44
A manually operated knob 41 is connected to the first selector 9a of the first switch device 9 to the other end of the electric motor 10, and a manual operation knob 41 is connected to the second switch device 40.
the second and third selectors (43 and 4
4) to each of the two terminals (+12V, ground) of the power supply.

Note that the symbols inside the brackets are attached to corresponding elements in the embodiments described later.

(Function) According to this, an intermediate voltage (+6V) is always applied to one end of the electric motor 10, and the first switch device 9 and its first set of contacts (N, 2 ₁ -
2 ₄ ) of the second set of contacts (42n, 42 ₁ to 42 ₄ ) of the second switch device 40 electrically connected to
and the electric motor 1 via the second selector 43
0, one voltage (ground) of the two terminals (+12V, ground) of the power supply is applied to the other end of the electric motor 10, that is, an intermediate voltage (+6V) of a certain polarity (for example, positive polarity) is applied to the electric motor 10. The motor 10 can be rotated in a certain direction (for example, in the forward direction).
Further, a third set of contacts (44n, 44) of the second switch device 40 electrically connected to the first switch device 9 and its contacts (N, 2 ₁ to 2 ₄ )
₁ to 44 ₄ ) and the other end of the electric motor 10 via the third selector 44, the other voltage (+12V) of the two terminals (+12V, ground) of the power supply is applied, that is, the electric motor 10 has a reverse polarity. By applying a (negative polarity) intermediate voltage (-6V), the electric motor 10 can be rotated in the opposite direction (negative direction).

In this way, the voltage is practically half of the power supply voltage of 12V.
The electric motor 10 will be driven by 6V, but as mentioned above, the electric motor may be small and low torque, so the electric motor 10 can be sufficiently driven with half the voltage. intermediate voltage generating means R1,
R2 is composed of resistors R1 and R2, and resistors R1 and R
2 causes power consumption, but since the value of the current flowing to the electric motor 10 is small, this power consumption is small. Resistors R1 and R2 need only withstand the current value required to energize the electric motor 10, and are extremely simple and inexpensive. Of course, they do not require an IC for energization control, and they do not require energization of the electric motor. Active elements such as switching transistors and relays can be omitted, and a lamp irradiation angle adjusting device can be obtained which is simple and inexpensive and is equipped with electric circuits for forward and reverse energization of the electric motor.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

(Embodiment) FIG. 1 shows the configuration of the lamp side of an embodiment of the present invention. The lamp 1 is arranged on the right side of the front part of the car, facing forward. This is the right head line. The substrate of the lamp 1 is supported below by a joint 2,
It is supported by joint 3 above.

A threaded rod 4 is fixed to the ball bearing of the joint 3, and a female thread 5 with an arm is attached to this threaded rod 4.
are screwed together. Link 6 is attached to the arm of female screw 5.
One end of the link 6 is connected, and the other end of the link 6 is connected to one end of the arm 7. The other end of the arm 7 is fixed to the output shaft of a reduction gear unit 8. This output shaft also has a feedback switch device 9.
The rotating shaft is fixed. Reduction gear unit 8
A rotating shaft of an electric motor 10 is coupled to an input shaft of the electric motor 10 .

The feedback switch device (first switch device) 9 and the motor 10 are connected to a tilt angle indicating switch device (second switch device) 40 equipped with a manually operated knob.

In the above configuration, the joints 2 and 3, the threaded rod 4, the female thread 5, the link 6, and the arm 7 are the lamp support mechanism, and the motor 10 is the actuator. When the motor 10 rotates forward, for example, the arm 7 and the link 6 rotate, the female screw 5 and the threaded rod 4 move to the left, and the inclination angle (angle with respect to the horizontal plane) of the lamp 1 becomes smaller. When the motor 10 reverses, the female screw 5 and the threaded rod 4 move to the right, and the angle of inclination of the lamp 1 increases.

By applying a screwdriver to the right end of the threaded rod 4 and turning the threaded rod 4, the threaded rod 4 moves to the left or right with respect to the female thread 5, and the inclination angle of the lamp 1 changes. This adjustment is performed when the lamp 1 is installed, repaired, etc.

In addition to the above-mentioned right light, the head light includes a left light, and the left light is also equipped with a similar lamp support mechanism, gear unit, feedback switch device, and electric motors 18-20.

FIG. 2 shows the connection relationship between the above-mentioned equipment of the left and right lights and a tilt angle indicating switch device 40 provided with a manually operated knob.

A manual knob 41 is fixed to the rotation shaft of the tilt angle indicating switch device 40 . The switch device 40 is installed around the driver's seat in the vehicle, and a knob 41 for manual operation is placed in an exposed manner inside the vehicle. A power supply voltage line and a ground line are connected to the tilt angle indicating switch device 40, and these lines and a second
Seven wires including the five selection connection wires connected to the five contacts 42n, ₄₂₁ to ₄₂₄ of the set are connected to the feedback switch device 9 of the right light and the motor via the connectors 51 and 52. 10.

Each of the five contacts 44n, ₄₄₁ to ₄₄₄ of the third set is also commonly connected to the five selection connection lines.

The second selector 43 has a shape that allows it to simultaneously contact only four of the second set of five contacts 42n, 42 ₁ to 42 ₄ , and similarly, the third selector 44 also contacts the third A set of five contacts 44n, 44 ₁ ~
₄₄ It has a shape that allows it to contact only four of the four at the same time.

Similarly, the second set of five contacts 4 for the left light.
5n, 45 ₁ to 45 ₄ , 3rd set of 5 contacts 47
n, 47 ₁ to 47 ₄ and second and third selectors 46 and 47.

second and third selectors 43 for the right light;
44 and the second and third selectors 46 and 47 for the left light are fixed to the same rotating shaft, and the manually operated knob 41 is fixed to the rotating shaft. The second selectors 43 and 46 are commonly connected to the ground line, and the third selectors 44 and 47 are connected to the power supply voltage (+
12V). However, the second selectors 43, 46 and the third selectors 44, 47
For example, focusing on the second selector 43 and the third selector 44, when the knob 41 indicates N, the second selector 43 is moved clockwise in front of the contact 42n. The third selector 44 does not contact the contact 44n but does not contact it or any of the other contacts 42 ₁ to 42 ₄ , and the third selector 44 does not contact the contact 44n but contacts all the other contacts 44 _{1 to} 42 4 . 44 ₄
It is shaped and arranged so that it makes contact with the Picker 4
When 1 indicates "3", the second selector 43 contacts the contacts 42n, 42 ₁ and 42 ₂ , and the third selector 44 contacts only the contact 44 ₄ .

Contactor 45n, 45 ₁ to 45 ₄ , 4 for left light
The combination of 7n, 47 ₁ to 47 ₄ and the second and third selectors 46, 47 is also exactly the same as that for the right right.

In addition, although four sets of contacts and four selectors are shown distributed on a plane in FIG. 3, there are four sets of contacts and four selectors each in contact with
The four drawer contacts are formed on the same printed circuit board concentrically and on the same plane with different radii, and each selector has a brush that contacts the four contacts and one drawer connection brush. The brush for connecting the drawer is always in contact with one of the ring-shaped drawer contacts (printed electrodes). Connect this lead-out contact to the ground wire (in the case of the second selector) or +
The 12v power supply voltage line (for the third selector) is connected.

With the above configuration, by operating one knob 41, 4
The selectors 43, 44, 46, and 47 rotate simultaneously in the same direction with respect to each of the four sets of contacts in the relationship shown in FIG. The forward/reverse rotation of the motor and the tilting of the left and right lamps corresponding to the operation of the operating knob 41 are exactly the same and are performed at the same time.
Hereinafter, only the illumination angle adjustment system and adjustment operation of the lamp 1 of the right light will be explained.

The second set of contacts 42n, 42 ₁ to 42 ₄ and the third set of contacts 44n, 44 ₁ to 44 ₄ are connected in common to correspond to each other. One set of contacts 2n, 2 ₁ ~
2 Connected to ₄ .

The feedback switch device 9 has 2×(5−
1) It includes a number of contacts N, 1 ₁ to 1 ₃ , 2 ₁ to 2 ₄ and a first selector 9a that contacts only one of the contacts. Among these contacts, among the contacts of the tilt angle indicating switch device 40, the contact N corresponds to the contacts 42n and 44n that indicate the maximum angle.
The contacts 2 4 corresponding to the contacts 42 ₄ , 44 ₄ that indicate the minimum angle have contacts 42 n and 44 ₄ , respectively.
The common connection line of 44n and the common connection line of contacts 42 ₄ and 44 ₄ are connected, and are not commonly connected to other contacts. However, the contacts between these contacts N and 2 ₄ are connected in common, and the contacts located symmetrically with respect to the line connecting N-2 ₄ are connected to the corresponding contacts of the tilt angle indicating switch device 40. Commonly connected to children. That is, the contacts 1 ₁ and 2 ₁ of the feedback switch device 9 are connected in common,
The contact 42 ₁ of the tilt angle indicating switch device 40 is connected to 44 ₁ , and the contacts 1 ₂ and ₂ 2 of the feedback switch device 9 are connected in common, so that the contact of the tilt angle indicating switch 40 is connected to the contact 42 1 of the tilt angle indicating switch device 40 . Children 42 ₂ and 44 ₂
The contacts 1 ₃ and 2 ₃ of the feedback switch device 9 are connected in common, and are connected to the contacts 42 ₃ and 44 ₃ of the tilt angle indicating switch device 40.

Now, when the manual operation knob 41 of the tilt angle indicating switch device 40 is in the N position and the lamp 1 is set to the indicated position, the selector of the feedback switch device 9 is turned on as shown in FIG. 9a is in contact with the contactor N. In this state, the second and third selectors 43 and 44 of the tilt angle indicating switch device 40 are connected to the contacts 42n and 44.
n, so the resistor R1 connected to the forward rotation energizing terminal of the motor 10 is applied with ground potential, and the resistor R2 connected to the reverse rotation energizing terminal is applied with +12V. Since the selector connected to the common terminal is floating, the motor 10 is not energized and is stopped.

Here, when the knob 41 is rotated one step clockwise, the second selector 43 of the tilt angle indicating switch device 40 contacts the contact 42n, and the third selector 44 contacts the contacts 44 ₂ to 44 ₃ . . In the feedback switch device 9, since the first selector 9a is in contact with the contact N, it is connected to the ground by the second selector 43, and +12V is added to the resistor R1. , the motor 10 rotates normally. This causes the first selector 9a of the feedback switch device 9 to rotate clockwise and come into contact with the contactor ₂₁ . Contactor ₂₁ is electrically floating because the third selector 44 is farther away than contactor ₄₄₁ , so while the first selector 9a is in contact with both contacts N and ₂₁ , , the motor 10 continues to rotate in the normal direction, and the first selector 9a continues to rotate in the clockwise direction. When the first selector 9a separates from the contact N, the first selector 9a becomes in a floating state, and the motor 10 is de-energized and the motor 10 stops.

Similarly, each time the knob of the tilt angle indicating switch device 40 is rotated one step clockwise, the motor 1
0 rotates the first selector 9a of the feedback switch device 9a one step clockwise and then stops.

Contrary to the above, for example, when the knob 41 of the tilt angle indicating device 40 is in the "3" position, the second selector 43 contacts the contacts 42n, 41 ₁ and 42 ₂ , and the third selector 44 is in contact with only the contactor ₄₄₄ , and in the feedback switch device 9, the knob 41 is turned counterclockwise with the first selector 9a correspondingly in contact with the contactor ₂₃ . When rotated one step, the second selector 43
contacts only contacts 42n and ₄₂₁ ;
A selector 44 contacts contacts 44 ₃ and 44 ₄ . Then, the selector 9a changes to the third selector 4.
4 is connected to +12V, the common terminal of the motor 10 becomes +12V, current flows through the motor 10-resistor R2, the motor 10 rotates in reverse, and the first selector 9a rotates counterclockwise. Since the contact 2 ₂ is electrically floating when it leaves the first selector 9a contact 2 ₃ , the motor 10 is de-energized and the motor 10 stops.

In the operation described above, the contacts 1 ₁ -1 ₃ of the feedback switch device 9 have no meaning. However, if we connect resistor R1 to ground potential and resistor R2
When connected to +12V, the rotation direction of the motor 10 is reversed to that described above, and in the feedback switch device 9, the contacts N and 1 ₁ to 1 ₃ , 2
Only ₄ is meaningful. In this way, in the feedback switch device 9, two sets of contacts (2 ₁ to 2 ₃ , 1 ₁ to 1 ₃ ) are arranged symmetrically between the contacts (N, 2 ₄ ) corresponding to the maximum angle and the minimum angle. and the rotation direction of the motor 10 and the first selector 9a.
The reason why the rotation direction of the parts can be set in either the same direction or the opposite direction is to prevent malfunction or damage caused by incorrect connections during assembly. This is based on the consideration that the relationship between the rotational direction of the tilt angle indicating switch device 40 and the increase or decrease of the tilt angle of the lamp 1 can be selectively set.

Note that as long as the settings are the same, the left light lamp also performs exactly the same operation as the right light lamp 1, as described above.

As described above, in the above embodiment, the resistance R
1 and R2 divide +12V in half, and apply a voltage of +6V to one end of the motor 10, and apply ground potential or +12V to the other end of the motor 10. polarity is reversed
I am trying to apply 6V. This is because +12V is easy to obtain as a power source, voltage division by resistors R1 and R2 is inexpensive, and an inexpensive small motor can be used.

In the above embodiment, the selector is driven to rotate, but the selector may be driven directly, or the selector may be fixed and the contacts may be driven. Furthermore, a switch device having the structure of the tilt angle indicating switch device 40 is coupled to a lamp driving mechanical system as a feedback switch device, and a switch device having the structure of the feedback switch device 9 is used as a tilt angle indicating switch. The device may be placed inside the vehicle.

〔Effect of the invention〕

As described above, according to the present invention, the intermediate voltage generating means R1 and R2 are constituted by the resistors R1 and R2, and the resistor R
1, R2 may be of any type as long as it can withstand the current value required to energize the electric motor 10, and is extremely simple and inexpensive. Of course, it does not require an IC for energization control, and it is suitable for energizing the electric motor. Active elements such as switching transistors and relays are omitted, and a simple and inexpensive lamp irradiation angle adjusting device equipped with electric circuits for forward and reverse energization of the electric motor is obtained.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a lamp support mechanism according to an embodiment of the present invention, and FIG. 2 is a diagram showing the connection between a tilt angle indicating switch device, a feedback switch device, and an electric motor in the embodiment. Block diagram shown,
FIG. 3 is a wiring diagram showing the configuration of the tilt angle indicating switch device and the feedback switch device. 1: lamp (lamp), 2, 3: joint,
4: Threaded rod, 5: Female thread, 6: Link, 7: Arm, 8: Reduction gear unit (2 to 3: lamp support mechanism), 9, 10: Feedback switch device (first switch device), 1 ₁ ~1 ₃ : Contact, N,
2 ₁ to _{2 4} : Contactor (first set of contacts), 9a: Selector (first selector) 10, 20: Electric motor (electric motor), 40: Switch device for inclination angle indication (second switch device), 41: knob (manually operated knob), 42n, 42 ₁ to 42 ₄ ; 45n, 4
5 ₁ to 45 ₄ : Contact (second set of contacts) 43,4
6: Selector (second selector), 44n, 44 ₁
~44 ₄ ; 47n, 47 ₁ ~47 ₄ : Contactor (third
set of contacts), 44, 47: selector (third selector).

Claims (1)

[Claims] 1. A resistor connected between two terminals of a power source,
intermediate voltage generating means having an output end that outputs a voltage substantially intermediate between the voltages between the two terminals; a lamp support mechanism that supports the lamp in a tiltable manner and changes the inclination of the lamp by mechanical displacement; the output of the intermediate voltage generating means an electric motor connected at one end to provide a mechanical displacement to the lamp support mechanism; a first set of a plurality of contacts; a first set of contacts in electrical contact with at least one of the first set of contacts; a first switch device comprising a selector and in which contact is switched by moving one of the first set of contacts and the first selector relative to the other; and a plurality of contacts of the first switch device; a second set and a third set electrically connected to the first set of contacts;
a plurality of contacts of the set, a second selector capable of contacting the second set of contacts, and a third selector capable of contacting the third set of contacts, the second set and the third set of contacts; and a second switch device in which electrical contact is switched by moving one of the first switch device and the selector relative to the other, one contact of the first switch device and the second switch device and the selector. a moving side of the electric motor is coupled to a rotating shaft of the electric motor or a rotating portion of a lamp support mechanism driven thereby, and the other contact of the first switching device and the second switching device The manually operated knob on the moving side of the selector is combined with the first
the first selector of the switch device is connected to the other end of the electric motor, and the second and third selectors of the second switch device are connected to each of the two terminals of the power source, the illumination angle of the lamp; Adjustment device.