JPH07111102A - Circuit for controlling direction of illumination of lamp - Google Patents

Abstract

PURPOSE:To allow a lamp to return to its original position when power is interrupted in a lamp unit, in which the lamp is turned by a motor so that its direction of illumination is varied. CONSTITUTION:A circuit for controlling the direction of illumination of a lamp is provided with a turning-direction setting means 90 for setting the direction of turning of the lamp 44, a power interruption detection means 88 for detecting the interruption from a power source 79, a lamp-turning-position detection means 91 for detecting the turning position of the lamp, and a current-carrying polarity switching means 89 for switching current-carrying polarities to motors 14, 54; when the power interruption detection means 88 detects that power is interrupted, the current-carrying polarity switching means 89 selects the current- carrying polarity to the motors in accordance with the turning position of the lamp which is detected by the lamp turning position detection means 91, thereby setting the direction of turning of the lamp to that in which the lamp will return to its original position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel lamp irradiation direction control circuit. More specifically, in a lamp device in which a motor rotates a lamp to change its irradiation direction, it is intended to provide a novel lamp irradiation direction control circuit that returns the lamp to its original position when the power is cut off. To do.

[0002]

2. Description of the Related Art A lamp device is known in which a lamp is rotated by a motor to change its irradiation direction.

For example, using two motors, one motor rotates the lamp in the left-right direction, and the other motor rotates the lamp in the vertical direction.
There is one that can change the irradiation direction of the lamp vertically and horizontally.

[0004]

However, in the conventional lamp device, when the power is cut off while the lamp is rotated in a certain direction, the lamp remains stopped at the rotated position. I was in a state.

Therefore, when the lamp is next turned on,
There was a problem that I was surprised because it lights up at an unexpected position.

The power is cut off intentionally, that is, when the operator turns off the power with the intention of turning it off, or unintentionally, that is, against the intention of the operator. May be cut off.

When the power is intentionally shut off,
It is possible for the operator to return the lamp to the home position by himself, but if the power is cut off unintentionally, the operator can return the lamp to the home position by himself. Since it does not exist, the next time the lamp is turned on, the lamp may turn on at an unexpected position.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a lamp irradiation direction control circuit according to the present invention has a rotating direction setting means for setting a rotating direction of a lamp and a power source for detecting a power cutoff. The power cutoff detection means includes a cutoff detection means, a lamp rotation position detection means for detecting the rotation position of the lamp, and a conduction polarity switching means for switching the conduction polarity to the motor. At this time, the energizing polarity switching means selects the energizing polarity to the motor in accordance with the lamp rotating position detected by the lamp rotating position detecting means to return the rotating direction of the lamp to the original position. It is designed to be oriented.

[0009]

Therefore, in the irradiation direction control circuit of the lamp of the present invention, when the power source is cut off, the lamp is controlled whether it is intentional or unintentional. Since it always returns to the origin position, at the next lighting, the lighting will always start at the origin position, and there will be no surprise when lighting at an unexpected position.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the irradiation direction control circuit of the lamp of the present invention will be described below with reference to the illustrated embodiments.

In the illustrated embodiment, the present invention is applied to a lamp irradiation direction control circuit in a movable lighting device in which a lamp is rotated by a motor to change the irradiation direction.

In the figure, reference numeral 1 is a movable lighting device to which the present invention is applied to the irradiation direction control circuit of the lamp.

Reference numeral 2 denotes a base plate, which is fixed to a portion to which the movable lighting device 1 is attached, such as a roof of an automobile.

The base plate 2 has a circular shape in a plan view, and a peripheral wall 2a is formed in an upright shape on the outer peripheral edge thereof.

Reference numeral 3 is a sleeve fixed on the base plate 2, and has a concentric center hole 4 and an outer peripheral surface 5. A gear portion 5a is formed on the outer peripheral surface 5 along the entire circumference thereof.

A cam groove 6 is formed on the upper surface of the sleeve 3 between the central hole 4 and the outer peripheral surface 5. The cam groove 6 is formed in a range that makes a substantially complete circle around the upper surface of the sleeve 3, and has a right position detecting portion 6a along an arc that makes a semicircle around the outer peripheral surface 5 of the upper surface around the center of the center hole 4. ,
A left position detecting portion 6b, which is along a circular arc substantially half around a position near the center hole 4 on the upper surface at a position deviated from the right position detecting portion 6a, a right position detecting portion 6a and a left position. The position detecting portion 6b is composed of a linear transition portion 6c connecting between the ends that are close to each other.

Reference numeral 7 denotes a cylindrical shaft, which is rotatably fitted in the central hole 4 of the sleeve 3.

Reference numeral 8 is a cord that bundles harnesses for supplying power to a light source of a lamp body, a motor, etc., which will be described later, and for connecting a switch and a control circuit. The cord is fitted in the center hole of the shaft 7. The bush 9 is inserted.

Reference numeral 10 is a main chassis made of a metal plate.

.. are formed vertically downward on both left and right ends of the front and rear edges of the main chassis 10, and are raised upward from both left and right edges. Side walls 12, 12 are formed, and the side walls 12, 1 are formed.
Mounting pieces 13, 13 are horizontally projected so as to approach each other at substantially the center of the upper edge of the second edge 2.

The substantially central portion of the main chassis 10 is fixed to the upper end of the shaft 7, whereby the main chassis 10 is rotatably supported by the base plate 2.

Reference numeral 14 is a motor for left / right rotation.

The motor 14 is fixed to the upper surface of the main chassis 10 at a position closer to one side so that the rotation shaft 14a thereof projects below the main chassis 10.

Reference numeral 15 is a clutch shaft, and the fitting shaft 1
6 and a flange 1 protruding laterally from one end of the fitting shaft 16
7 and a screw shaft 18 that is connected to the other end of the fitting shaft 16 and has a diameter smaller than that of the fitting shaft 16 are integrally formed of metal, and a connecting hole 15a that penetrates the center of the whole is formed. There is.

A screw hole 16a is formed in the fitting shaft 16 so as to connect the side surface of the fitting shaft 16 with the connecting hole 15a.
Further, the flange 17 has a plurality of, for example, eight clutch holes 1 at equal intervals on the same circumference centered on the connecting hole 15a.
7a, 17a, ... Are formed.

A rotating shaft 14a protruding downward from the main chassis 10 of the left / right rotating motor 14 is inserted into the coupling hole 15a of the clutch shaft 15 from the flange 17 side, and a screw hole of the clutch shaft 15 is inserted from the outside. A set screw 16b screwed to 16a is fastened to the rotary shaft 14a of the motor 14, whereby the clutch shaft 15 is fixed to the rotary shaft 14a of the motor 14.

Reference numeral 19 is a clutch ring in the form of a wide ring having a planar shape, and the inner diameter of the center hole 19a thereof is formed to be substantially the same as the outer diameter of the fitting shaft 16 of the clutch shaft 15. The size of the clutch ring 19 in the axial direction is formed to be substantially the same as the length of the fitting shaft 16 of the clutch shaft 15.

A gear portion 2 is provided on the outer peripheral surface of the clutch ring 19.
0 is formed.

Further, in a portion between the central hole 19a and the outer peripheral surface, a plurality of, for example, four accommodating holes 19b, 19b, ... Is formed so as to extend in the axial direction. These storage holes 1
9b, 19b, ... Are formed in screw holes.

Reference numeral 21 is a ball plunger, which is composed of a cylindrical body, a ball and a coil spring.

Reference numeral 22 is a cylindrical body, which comprises a main portion 23 and a lid body 24. The main portion 23 has a cylindrical shape, and a toe edge 23a projects toward the center at one end thereof. Also, the main part 2
The length of 3 is the same as the axial length of the clutch ring 19, and a thread 23b is formed on the outer peripheral surface thereof. The lid 24 is fixed to the other end of the main portion 23 to close it.

Reference numeral 25 denotes a ball, which is housed in the cylindrical body 22 and partially protruded from one end of the cylindrical body 22 in a state where it is prevented from coming off by the tongue 23a.

Reference numeral 26 is a coil spring, which is a cylindrical body 22.
It is housed inside and is compressed between the ball 25 and the lid body 24, whereby the ball 25 is urged with a moving force so that a part thereof projects from one end of the cylindrical body 22.

The ball plungers 21, 21, ...
.. are the respective storage holes 19b, 19b of the clutch ring 19,
Are housed by being screwed into the clutch ring 19 one by one, and a part of the balls 25, 25 ,.

As described above, the ball plungers 21, 2
The clutch ring 19 in which 1, ...
.. are rotatably fitted onto the fitting shaft 16 of the clutch shaft 15 so as to face the flange 17. Then, this state is held by fastening the nut 27 to the screw shaft 18 of the clutch shaft 15. Reference numeral 28 is a washer that is positioned between the nut 27 and the end surface of the fitting shaft 16 of the clutch shaft 15. This prevents the clutch ring 19 from coming off the fitting shaft 16 of the clutch shaft 15.

As described above, the clutch ring 19 is rotatably supported by the clutch shaft 15 so that the gear portion 20 formed on the outer peripheral surface of the clutch ring 19 is formed on the outer peripheral surface 5 of the sleeve 3. Is engaged with the gear portion 5a.

Further, the clutch shaft 15, the clutch ring 19, and the ball plungers 21, 21, ...
The clutch mechanism 29 is configured by. That is, normally, the ball 2 of the ball plungers 21, 21, ...
... are coil springs 26, 2 in clutch holes 17a, 17a ,.
The clutch shaft 15 and the clutch ring 19 are connected by being engaged by the forces of 6, ...
The clutch ring 19 is rotated via the. When a load larger than a predetermined value is applied to the clutch ring 19 side, the coil springs 26, 26, ... Are compressed by the load, and the balls 25, 25 ,.
a, 17a, ... Get out of the clutch shaft 15
Is disengaged from the clutch ring 19 and the motor 1
4 and clutch shaft 15 idle.

When the left / right rotation motor 14 is driven to rotate the clutch ring 19, the gear portion 20 of the clutch ring 19 is rotated.
Gear part 5a of the sleeve 3 fixed to the base plate 2
The clutch ring 19 engages with the sleeve 3
The main chassis 10 on which the motor 14 is fixed is revolved around the outer peripheral surface 5 of the vehicle.
However, depending on the rotation direction of the motor 14, the motor rotates to the right or left.

Reference numeral 30 is a switch lever, which is located on the upper surface side of the main chassis 10 and has one end rotatably supported by the main chassis 10 by a shaft 30a.
Reference numeral 31 is an engaging pin, which is provided so as to project downward from the center of the switch lever 30 at a position closer to the pivotal rotation end. The portion 30b of the switch lever 30 between the position where the engaging pin 31 is formed and the rotation end is formed to have a smaller width than the other portions.

Then, the engaging pin 31 passes through the long hole 32 formed in the main chassis 10, and the main chassis 1
0, and is slidably engaged with the cam groove 6 formed on the upper surface of the sleeve 3.

Reference numerals 33R and 33L denote microswitches arranged on the upper surface of the main chassis 10 so as to sandwich the rotating end portion 30b of the switch lever 30. The tips of the pressed blades 34 and 34 are the switch lever 30. It is elastically attached to the turning end of the.

However, when the main chassis 10 is in the neutral position, that is, the origin position (see FIG. 6), the engagement pin 31 is engaged with the intermediate portion of the transition portion 6c of the cam groove 6, and the switch lever is engaged. The rotating end portion 30b of 30 is located exactly in the middle of the two micro switches 33R and 33L, and both of the two micro switches 33R and 33L are in the off state.

When the main chassis 10 rotates rightward from the neutral position (see FIG. 7), the engaging pin 31 moves into the right position detecting portion 6a of the cam groove 6 and the switch lever 30.
The rotation end portion 30b of the
The rotating end portion 30b presses the pressed blade 34 of the micro switch 33R, whereby the micro switch 33R is pressed.
R is turned on. As a result, it is detected that the main chassis 10 has been rotated rightward.

When the main chassis 10 rotates leftward from the neutral position (see FIG. 8), the engaging pin 31 moves into the left position detecting portion 6b of the cam groove 6, and the rotation of the switch lever 30 is changed. The moving end 30b rotates so as to be displaced inward, and the rotating end 30b presses the pressed blade 34 of the micro switch 33L, whereby the micro switch 33L is turned on. As a result, it is detected that the main chassis 10 is rotated leftward.

Reference numeral 35 is a body, and underbody 36
And upper body 37.

The underbody 36 is made of synthetic resin, has a substantially cylindrical shape, and has a large diameter at the lower end and a small diameter at the upper end. The inner diameter of the lower end portion is formed in a circular shape that is slightly larger than the outer diameter of the base plate 2.

Reference numeral 38 denotes a seal body made of synthetic resin, which has a substantially annular shape and is in the shape of a rectangular groove having a cross-sectional shape that opens downward. The outer diameter of the seal body is equal to that of the lower end portion of the underbody 36. It is formed slightly smaller than the inner diameter and is fixed inside the lower end of the underbody 36.

Then, the leg piece 1 of the main chassis 10
Are fixed to the upper surface of the seal body 38. In addition, the peripheral wall 2a of the base plate 2 is a seal body 3
8 is located in a groove 38a opened downward.

Reference numeral 39 is an airtight material called "pile weather seal" (trade name), and raised from one surface of a belt-shaped synthetic resin base 39a to raised hairs 39b, 39b, ....
Are provided in an infinite number, and the base 39a is fixed to one surface of the peripheral wall 2a of the base plate 2, and
The ends of b, 39b, ... Are grooves 38 of the seal body 38.
It is in contact with one inner surface of a. Incidentally, such an airtight material 39 may be fixed to both surfaces of the peripheral wall 2a (see FIG. 12).
Alternatively, the tips of the naps 39b, 39b, ... May be fixed to one or both surfaces of the groove 38a of the seal body 38 so as to contact the peripheral wall 2a of the base plate 2 (see FIG. 13). ).

Therefore, the airtight material 39 maintains the airtightness between the base plate 2 on the fixed side and the seal body 38 on the movable side, and water or dust may enter from the lower end of the underbody 36. To be prevented.

A support plate 40 which is horizontally arranged is integrally formed on the upper end of the underbody 36. And
The mounting pieces 13 of the main chassis 10 are the support plates 4
It is fixed to the bottom surface of 0.

Reference numeral 41 designates a peripheral wall integrally raised from the peripheral edge of the support plate 40 excluding the front end thereof. The peripheral wall is highest at the rear end, and its upper end turns to a position corresponding to the approximate center of the support plate 40 in the front-rear direction. The side surface is inclined so that its upper edge is flush with the upper surface of the support plate 40 at the front end.

The upper body 37 is composed of a frame portion 42 forming a front end portion and a cover portion 43 connected to the rear portion of the frame portion 42 made of synthetic resin. The frame portion 42 has a horizontally long rectangular frame shape when viewed from the front. Cover part 4
3, the front end and the lower end are open, and the frame portion 42 is connected and fixed to the opening 43a at the front end. Then, the upper end portion of the underbody 36 is positioned inside the cover portion 43 through the opening 43b at the lower end.

Reference numeral 44 denotes a lamp body serving as a lamp, which has a lamp body 45 having a recessed portion open to the front and a lens 4 attached to the lamp body 45 so as to cover the front opening thereof.
6, a lamp body 45, and a lens 46 are provided in a space defined by a lens 46, which will be described later.

Reference numeral 47 is a lamp bracket, which comprises a frame portion 48 and arm portions 49 provided on both left and right sides of the frame portion 48.

The frame portion 48 is formed of a metal plate, has a horizontally long rectangular frame shape, and is fixed to the front end portion of the lamp body 45 of the lamp body 44 in an externally fitted state.

The arm portion 49 is also formed of a metal plate, and has vertically long plate-shaped base portions 49a and 49a fixed to the left and right side surfaces of the frame portion 48 by welding, and a position slightly above the lower ends of the base portions 49a and 49a. From the upper end of the base 49a, 49a and the connecting piece 49c connecting between the rear ends of the two arm pieces 49b, 49b, and the spring hook projecting rearward. Piece 49d, 4
9d is integrally formed.

Reference numeral 50 denotes an upper chassis fixed to the upper surface of the support plate 40 of the underbody 36. The upper chassis 50 is formed of a metal plate in a horizontally long rectangular shape as viewed from above, and the front end portions of the left and right side edges are viewed from the side. L-shaped support pieces 50a, 50a are provided so as to project upward, and spring hooking pieces 50b, 50b are also provided so as to project upward at the rear end portions of both left and right edges.

Then, the support piece 50 of the upper chassis 50
The lower ends of the bases 49a and 49a of the arm portion 49 of the lamp bracket 47 are rotatably supported at the front ends of the a and 50a, and the spring hooking pieces 49d and 49d of the arm portion 49 are also supported.
And tension coil springs 51, 51 are stretched between the spring hooking pieces 50b, 50b of the upper chassis 50.

Reference numeral 52 denotes a connecting arm, which is formed by integrally forming a plate-shaped fixing piece 52a and a connecting portion 52b projecting rearward from one side edge of the fixing piece 52a by a metal plate, and fixing the same. The piece 52a is fixed to a position near the center of the connecting piece 49c of the arm portion 49 of the lamp bracket 47.

Reference numeral 53 is a motor bracket fixed to the upper surface of the main chassis 10, and is in a state of being erected upward at a substantially central portion of the main chassis 10 in a direction extending substantially in the front-rear direction.

Reference numeral 54 is a vertically rotating motor, which is fixed to one surface side of the motor bracket 53, and its rotation shaft 54a is projected to the other surface side of the motor bracket 53.

Reference numeral 55 is a clutch shaft, and the fitting shaft 5
6 and a flange 5 protruding laterally from one end of the fitting shaft 56
7 and a screw shaft 58, which is connected to the other end of the fitting shaft 56 and has a diameter smaller than that of the fitting shaft 56, are integrally formed of metal, and a connecting hole 55a is formed through the center of the whole. There is.

The fitting shaft 56 has a substantially oval cross section, and a screw hole 56a is formed so as to connect the side surface of the fitting shaft 56 with the connection hole 55a. A plurality of, for example, eight clutch holes 57a, 57a, ...
Are formed.

The rotating shaft 5 of the vertical rotating motor 54 described above.
4a is inserted into the coupling hole 55a of the clutch shaft 55 from the flange 57 side, and the set screw 56b is screwed into the screw hole 56a of the clutch shaft 55 from the outside.
Are fastened to the rotary shaft 54a of the motor 54, so that the clutch shaft 55 is rotated by the rotary shaft 54a of the motor 54.
It is fixed to a.

Reference numeral 59 is a clutch ring in the form of a wide ring having a planar shape, and the inner diameter of the center hole 59a thereof is formed to be substantially the same as the outer diameter of the fitting shaft 56 of the clutch shaft 55 in the major axis direction. Also, the clutch ring 5
The axial size of 9 is the fitting shaft 5 of the clutch shaft 55.
It is slightly smaller than the length of 6.

Further, in the portion between the central hole 59a and the outer peripheral surface, a plurality of, for example, four accommodating holes 59b, 59b, ... Is formed so as to extend in the axial direction. These storage holes 5
9b, 59b, ... Are formed in screw holes.

A ball plunger 60 is composed of a cylindrical body, a ball and a coil spring.

Reference numeral 61 is a cylindrical body, which is composed of a main portion 62 and a lid 63. The main portion 62 has a cylindrical shape, and a toe edge 62a projects toward the center at one end thereof. Also, the main part 6
The length of 2 is the same as the axial length of the fitting shaft 56 of the clutch shaft 55, and the thread 62 is provided on the outer peripheral surface thereof.
b is formed. The lid 63 is fixed to the other end of the main portion 62 to close it.

Reference numeral 64 denotes a ball, which is housed in the cylindrical body 61 and partially protruded from one end of the cylindrical body 61 in a state where it is prevented from coming off by the tongue 62a.

Reference numeral 65 is a coil spring, which is a cylindrical body 61.
It is housed inside and is compressed between the ball 64 and the lid 63, whereby the ball 64 is urged with a moving force so that a part thereof projects from one end of the cylindrical body 61.

The ball plungers 60, 60, ...
.. are the storage holes 59b, 59b of the clutch ring 59,
... are respectively screwed and housed, and the ball plungers 60, 60, ... from one end surface of the clutch ring 59.
One end of the ball plungers 60, 60, ... Is protruded by a difference in axial length between the clutch ring 59 and the ball plungers 60, 60 ,.
A part of the balls 64, 64, ...

Reference numeral 66 denotes a connecting link, which is the first link 6
7 and a second link 68.

The base portion 69 of the first link 67 is formed in a large disc shape, and an insertion hole 70 is formed through the center portion thereof and extending in the axial direction. A central portion 70a of the insertion hole 70 is formed to have substantially the same cross-sectional shape as the fitting shaft 56 of the clutch shaft 55, and both end portions 70b, 70 are formed.
b is formed in such a size that the ball plunger 60 can be inserted therethrough. Further, another circular insertion hole 71 is formed at one position of the base portion 69, which is positioned with the central portion 70a of the insertion hole 70 interposed therebetween, and a notch 72 is formed at the other. The insertion hole 71 and the cutout 72 are formed in the ball plunger 6 described above.
The insertion hole 70 is formed in a size that allows 0 to be inserted therethrough.
Are arranged so as to be located on the same circumference centered on the center of the base 69 together with both ends 70b, 70b.

Reference numeral 73 is a pressing piece extending from one end of the notch 72 in an arc shape centered on the center of the base portion 69, and the arc of the pressing piece 73 is along a circle slightly larger than the basic outer diameter of the base portion 69. The size, that is, the size along a circle slightly larger than the outer diameter circle of the clutch ring 59.

As described above, the ball plungers 60, 6
The clutch ring 59 to which 0, ...
Are externally fitted to the fitting shaft 56 of the clutch shaft 55 in a direction facing the flange 57. And
This state is maintained by fastening the nut 74 to the screw shaft 58 of the clutch shaft 55. Then, at this time, the base portion 69 of the first link 67 is provided between the flange 57 of the clutch shaft 55 and the clutch ring 59.
Are fixed in a sandwiched manner. That is, the central portion 70a of the insertion hole 70 of the base portion 69 of the first link 67 is the clutch shaft 5
5, the portion of the ball plungers 60, 60, ... That protrudes from one end surface of the clutch ring 59 has the insertion hole 7 of the base portion 69 of the first link 67.
The two ends 70b, 70b, the insertion hole 71, and the cutout 72 are inserted. Then, the ball plungers 60, 60, ...
A part of balls 64, 64, ... Protruding from one end surface of cylindrical bodies 61, 61, ... Is engaged with clutch holes 57a, 57a ,.

Reference numeral 75 is a washer which is positioned between the nut 74 and the end surface of the fitting shaft 56 of the clutch shaft 55. This prevents the clutch ring 59 from coming off the fitting shaft 56 of the clutch shaft 55.

The second link 68 extends vertically above and below the support plate 40 by passing through the through holes 40a and 50c formed in the support plate 40 of the underbody 36 and the upper chassis 50, respectively. The lower end is rotatably connected to the rotating end of the first link 67, and the upper end of the support plate 40 is rotatably connected to the connecting part 52b of the connecting arm 52. Be connected.

When the vertical rotation motor 54 is driven, the lamp body bracket 47 is vertically rotated through the connecting link 66, and thus the lamp body 44 supported by the lamp body bracket 47 is vertically moved. It is rotated.

Reference numeral 76U is an upper position detecting micro switch, and 76D is a lower position detecting micro switch.
These micro switches 76U and 76D are fixed to the motor bracket 53, and each pressed blade 77,
77 is the pressing piece 7 of the first link 67 in a so-called neutral position in which the lamp body 44 is not tilted vertically.
It is located so as to face each other at the both ends of 3 (Fig. 3).
reference). In this state, which micro switch 76
U and 76D are also in the off state.
It is detected that 4 is in the neutral position, that is, the origin position.

Therefore, the vertically rotating motor 54 is used for the lamp body 4.
When driven to rotate 4 upward, the clutch shaft 55 rotates clockwise in FIG. 3, whereby the tip end of the pressing piece 73 of the first link 67 moves upward. Pressed blade 77 of switch 76U
Is pressed (see FIG. 15), the micro switch 76U is turned on, and it is detected that the lamp body 44 is rotated upward. Conversely, the vertical rotation motor 54 causes the lamp body 44 to
When the clutch shaft 55 is driven to rotate downward, the clutch shaft 55 rotates counterclockwise in FIG. 3, whereby the base end portion of the pressing piece 73 of the first link 67 detects the lower position. Pressed blade 77 of micro switch 76D
Is pressed (see FIG. 16), the micro switch 76D is turned on, and it is detected that the lamp body 44 is rotated downward.

Reference numeral 78 is a waterproof boot formed of rubber in a bellows shape, and one end of which is the support plate 4 of the underbody 36.
The upper surface of 0 is fixed by adhesion so as to cover the insertion hole 40a, and the other end is externally fitted to the second link 68 in a crimped manner.
Then, the motors 14, 54 and the micro switch 33
The space where R, 33L, 76U, and 76D are arranged, that is,
The space between the lower end of the underbody 36 defined by the main chassis 10 and the upper end defined by the support plate 40 is waterproof. That is, the lower end of the space is waterproofed by the airtight material 39, and the upper end is waterproofed by the waterproof boot 78.

When the left / right rotation motor 14 is driven, the main chassis 10 is rotated together with the body 35, and the lamp body 44 is rotated in the left / right direction. When the vertical rotation motor 54 is driven, the lamp body 44 rotates in the vertical direction with respect to the underbody 36 together with the upper body 37.

FIG. 17 is a circuit diagram showing a lamp irradiation direction control circuit.

Reference numeral 79 denotes a power source, which is the main power source line 8 grounded.
During 0, the power switch 81, the light switch 82, and the coil 83l of the relay 83 are connected in series.

A normally open contact 83a of a relay 83 is inserted on a power supply line 85 of the lamp body 44 to the electric bulb 84. Then, when both the power switch 81 and the light switch 82 are closed, the relay coil 83l is energized, the relay contact 83a is closed, and the light bulb 84 is turned on.

Reference numeral 86 denotes a display circuit, which is a light emitting diode 8
7P and 87L are connected in parallel, the cathodes of these light emitting diodes are grounded, and the anode of the light emitting diode 87P for power display is between the power switch 81 and the light switch 82 and the light emitting diode 87L for light display.
The anode of the light switch 82 is an anti-power switch 8
1 is connected to each side. Therefore, when the power switch 81 is closed, the light emitting diode 87P emits light, and when the power switch 81 and the light switch 82 are both closed, the light emitting diodes 87P and 87L both emit light.

Reference numeral 88 is a relay which constitutes a power cutoff detecting means. One terminal of the coil 88l is connected between the power switch 81 and the light switch 82, and the other terminal is grounded.

89 is an energization polarity switching means, which is composed of four relays 89R, 89L, 89U, 89D, one terminal of each relay coil 89Rl, 89Ll, 89Ul, 89Dl is connected to the power source 79, The other terminal of 89Rl is connected to the movable contact 88Rc of the relay 88 and the coil 8
The other terminal of 9Ll is the movable contact 88Lc of the relay 88.
The other terminal of the coil 89Ul is connected to the movable contact 88Uc of the relay 88, and the other terminal of the coil 89Dl is connected to the relay 8Uc.
8 movable contacts 88Dc, respectively.

Then, the relays 89R, 89L, 89U,
89D normally open contacts 89Ra, 89La, 89Ua, 8
9 Da is connected to a power supply 79, and normally closed contacts 89Rb, 89Lb, 89Ub, 89Db of these relays are grounded.

One terminal 14R of the left-right rotation motor 14
Is connected to the movable contact 89Rc of the relay 89R and the other terminal 14
L is connected to the movable contact 89Lc of the relay 89L.

Further, one terminal 54U of the vertically rotating motor 54 is connected to the movable contact 89Uc of the relay 89U, and the other contact 54D is connected to the movable contact 89Dc of the relay 89D.

Reference numeral 90 denotes a turning direction setting means, which is composed of four switches 90R, 90L, 90U, and 90D, and each switch is configured to be closed individually by, for example, remote control operation. One of the contacts of these switches is grounded, the other contact of the switch 90R is a normally open contact 88Ra of the relay 88, the other contact of the switch 90L is a normally open contact 88La of the relay 88, and the other contact of the switch 90U is Relay 88 normally open contact 88Ua
The other contact of the switch 90D is connected to the normally open contact 88Da of the relay 88.

Reference numeral 91 is a lamp rotation position detecting means, which is constituted by the microswitches 33R, 33L, 76U and 76D. One contact of these micro switches is grounded, the other contact of the micro switch 33R is a normally closed contact 88Lb of the relay 88, the other contact of the micro switch 33L is a normally closed contact 88Rb of the relay 88, and the micro switch 76U. The other contact of the relay 88 is a normally closed contact 88Db of the relay 88, and the other contact of the microswitch 76D is a normally closed contact 88U of the relay 88.
b, respectively.

Reference numeral 92 denotes an origin return prohibiting switch, which is closed when it is not desired to perform origin return at the time of power off, and is inserted between one terminal of the coil 88l of the relay 88 and the power supply 79. Has been done.

The operation of the circuit shown in FIG. 17 will be described.

First, when the power switch 81 is closed, the light emitting diode 87P of the display circuit 86 emits light, and the coil 88l of the relay 88 is excited to move the movable contacts 88Rc, 88Lc, 88Uc, 88D of the relay 88.
c is a normally open contact 88Ra, 88La, 88Ua, 88Da
Switch to the side.

Further, when the light switch 82 is closed, the light emitting diode 87L of the display circuit 86 emits light, and the coil 83l of the relay 83 is excited and its contact 8
3a is closed and the light bulb 84 of the lamp body 44 is turned on.

Therefore, for example, when it is desired to rotate the lamp body 44 to the right, the switch 90R of the rotation direction setting means 90 is used.
Close.

Then, while the switch 90R is closed, the other terminal of the relay coil 89Rl is connected to the relay 8
8 movable contact 88Rc, normally open contact 88Ra, switch 9
It is excited by being grounded via 0R, and the movable contact 89Rc of the relay 89R is switched to the normally open contact 89Ra side. As a result, one terminal 14R of the left-right rotation motor 14 is connected to the power supply 79, and the power supply 79-motor 1
4 terminal 14R-motor 14-other terminal 14L of motor 14-grounded circuit
Is rotated in one direction, and the lamp body 44 is rotated in the right direction.

Similarly, when the switch 90L is closed,
The movable contact 88Lc of the relay 88 is on the normally open contact 88La side, and the movable contact 89Lc of the relay 89L is on the normally open contact 89L side.
Switching to the a side, the motor 14 is rotated in the other direction, and the lamp body 44 is rotated in the left direction.

Similarly, when the switch 90U is closed, the lamp body 44 is rotated upward, and when the switch 90D is closed, the lamp body 44 is rotated downward.

Next, the case where the power supply is cut off when the lamp body 44 is at a position other than the origin position will be described.

A case where the lamp body 44 is rotated rightward from the origin position will be described.

When the left / right rotation motor 14 rotates in one direction, the main chassis 10 rotates to the right, and the lamp body 44 supported by the main chassis 10 via the underbody 36 rotates to the right.

When the main chassis 10 rotates to the right, the engaging pin 31 supported by the switch lever 30 comes into engagement with the right position detecting portion 6a of the cam groove 6, whereby the switch lever 30 rotates. Then, the rotating end portion 30b presses the pressed blade 34 of the right position detecting micro switch 33R, and the contact of the micro switch 33R is closed. As a result, the normally-closed contact 88L of the relay 88
b is grounded.

In this state, when the power supply 79 is cut off, that is, the power switch 81 is opened, the relay coil 88l
Is demagnetized and the movable contacts 88Rc, 88L of the relay 88 are demagnetized.
c, 88Uc, 88Dc are normally closed contacts 88Rb, 88L
The relay coil 89Rl is demagnetized by switching to the b, 88Ub, and 88Db sides. At the same time, since the normally closed contact 88Lb of the relay 88 is grounded, the relay coil 8
9Ll is excited. As a result, the demagnetized relay 8
The movable contact 89Rc of 9R is switched to the normally closed contact 89Rb side, and the movable contact 89Lc of the excited relay 89L is switched to the normally open contact 89La side.

Therefore, the other terminal 14L of the left / right rotation motor 14 is connected to the power source 79 and one terminal 14R is grounded, whereby the motor 14 is rotated in the other direction and the main chassis 10 is rotated counterclockwise. Rotate to. Then, when the main chassis 10 returns to the original position, the engagement pin 31 of the switch lever 30 moves the transition portion 6c of the cam groove 6.
Therefore, the micro switch 33R is opened and the motor 14 is stopped.

When the switch 90L is closed while the power switch 81 is closed, the relay coil 8
9Ll is excited, the motor 14 is rotated in the other direction, the main chassis 10 is rotated leftward, and when the main chassis 10 is facing leftward, the micro switch 33L is closed. Therefore, when the power switch 81 is opened and the power supply 79 is shut off, the motor 14 is rotated in one direction, and when the main chassis 10 returns to the original position, the motor 14 is stopped.

When the switch 90U is closed while the power switch 81 is closed, the relay coil 8
9Ul is excited, the motor 54 is rotated in one direction, the lamp body 44 is rotated upward, and the micro switch 76U is closed when the lamp body 44 is facing upward. Then, the power switch 81 opens and the power supply 79
Is cut off, the motor 54 is rotated in the other direction,
When the lamp body 44 returns to the home position, the motor 54 stops.

Furthermore, when the switch 90D is closed while the power switch 81 is closed, the relay coil 89Dl is excited, the motor 54 is rotated in the other direction, and the lamp body 44 is rotated downward. However, when the lamp body 44 faces downward, the micro switch 76D is closed. Therefore, when the power switch 81 is opened and the power supply 79 is shut off, the motor 54 is rotated in one direction, and when the lamp body 44 returns to the original position, the motor 5
4 stops.

Even when the connector between the switch box 93 and the relay unit 94 is disconnected and the power is cut off, the above origin return is performed.

If it is not desired to return the lamp body 44 to the origin even when the power switch 81 is opened, the origin return prohibiting switch 92 is closed. Then, the power switch 81
Even when the switch is opened, the relay coil 88l is kept in the excited state, so that when the switch of the lamp rotation position detecting means 90 is opened, the motor 14 or 54 is stopped at the same position.

[0114]

As is apparent from the above description, the irradiation direction control circuit of the lamp of the present invention is the irradiation direction control circuit of the lamp in the lamp device in which the motor rotates the lamp to change the irradiation direction. The rotation direction setting means for setting the rotation direction of the lamp, the power interruption detection means for detecting the interruption of the power supply, the lamp rotation position detection means for detecting the rotation position of the lamp, and the communication to the motor. An energizing polarity switching means for switching the electrode property, and when the power interruption detecting means detects interruption of the power source, the through electrode according to the rotating position of the lamp detected by the lamp rotating position detecting means. It is characterized in that the sex switching means selects the polarity of energization to the motor so that the rotating direction of the lamp is returned to the original position.

Therefore, in the irradiation direction control circuit of the lamp of the present invention, when the power source is cut off, the lamp is turned on whether it is intentional or unintentional. Since it always returns to the origin position, at the next lighting, the lighting will always start at the origin position, and there will be no surprise when lighting at an unexpected position.

The shapes and structures of the respective parts shown in the above embodiments are merely examples of the implementation of the present invention, and the technical scope of the present invention is limited thereby. Should not be construed in a definite way.

[Brief description of drawings]

FIG. 1 shows an example in which an irradiation direction control circuit of a lamp of the present invention is applied to a movable lighting device, and this figure is a front view of the movable lighting device.

FIG. 2 is a sectional view taken along line II-II in FIG.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a cross-sectional view taken along the line VV of FIG.

6 is an enlarged cross-sectional view taken along line VI-VI of FIG.

FIG. 7 is a diagram showing a state where the main chassis is rotated rightward from the state shown in FIG. 6;

FIG. 8 is a diagram showing a state where the main chassis is rotated leftward from the state shown in FIG. 6;

FIG. 9 is an exploded perspective view showing an enlarged clutch mechanism.

FIG. 10 is an enlarged vertical sectional view showing a ball plunger.

FIG. 11 is an enlarged cross-sectional view showing the waterproof mechanism at the lower end of the body.

FIG. 12 is an enlarged cross-sectional view showing a modified example of the waterproof mechanism.

FIG. 13 is an enlarged cross-sectional view showing another modified example of the waterproof mechanism.

FIG. 14 is an exploded perspective view showing an enlarged connecting mechanism of the link mechanism and the motor.

FIG. 15 is an enlarged side view of an essential part showing a state in which the lamp body is rotated upward from the state shown in FIG.

16 is an enlarged side view of a main part showing a state where the lamp body is rotated downward from the state shown in FIG.

FIG. 17 is a circuit diagram showing a lamp irradiation direction control circuit.

[Explanation of symbols]

 14 Left / right rotation motor (motor) 44 Lamp body (lamp) 54 Vertical rotation motor (motor) 79 Power supply 88 Relay (power cutoff detection means) 89 Energization polarity switching means 90 Rotation direction setting means 91 Lamp rotation position detection means

Claims (1)

[Claims] 1. A lamp irradiation direction control circuit in a lamp device, wherein a lamp is rotated by a motor to change the irradiation direction of the lamp, wherein a rotation direction setting means for setting the rotation direction of the lamp, and a power cutoff. A power cutoff detecting means for detecting a turning position of the lamp, a lamp turning position detecting means for detecting a turning position of the lamp, and an energizing polarity switching means for switching an energizing polarity to the motor. When the cutoff is detected, the energizing polarity switching means selects the energizing polarity to the motor according to the lamp rotating position detected by the lamp rotating position detecting means, and the rotating direction of the lamp is set to the origin. A lamp irradiation direction control circuit characterized in that the direction of returning to a position is set.