JPH07113814A - Direction detector - Google Patents

Abstract

PURPOSE:To provide an inexpensive, highly reliable and novel direction detector. CONSTITUTION:This is an apparatus for detecting a direction of a movable part 10 supported in a rotatable fashion to a fixed base part 3. An arc-shaped first groove 6a, a second groove 6b like an arc of a smaller diameter than that of the first groove 6a, and a third groove 6c connecting a gap between the first and second grooves straight are provided on an upper surface of the base part 3. An engaging pin 31 projecting at a position closer to a rotary end of a switch lever 30 rotatably provided at the movable part 10 is slidably engaged with the groove 6. Two switches 33R, 33L are arranged via a part 30b closer to the rotary end of the switch lever 30 of the movable part 10. When the engaging pin 31 is inside the third groove 6c, two switches are in the same state. When the engaging pin 31 is in the first or second groove 6a or 6b, the two switches 33R, 33L are turned ON and OFF or OFF and ON, i.e., in the opposite states.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a novel direction detecting device. More specifically, it is intended to provide a novel direction detecting device that is inexpensive and highly reliable.

[0002]

2. Description of the Related Art Conventionally, there is a rotary encoder as a means for detecting the direction of a movable part.

[0003]

However, although the rotary encoder is suitable for performing fine position detection and control based on it, it is expensive, and too expensive for simple direction detection. And again
There is a problem that it is not suitable when the movable part is rotated by 360 ° or more.

[0004]

The direction detecting device of the present invention comprises:
In order to solve the above-mentioned problems, a direction detecting device for detecting the direction of a movable portion rotatably supported by a fixed base portion, wherein the base portion has an arc-shaped first groove, A second arc-shaped member having a diameter smaller than that of the first groove.
And a third groove that linearly connects the first groove and the second groove with each other.
, And an engaging pin projecting at a position near the turning end of a switch lever rotatably provided on the movable portion is slidably engaged with the groove to provide a switch lever for the movable portion. Place the two switches in a position sandwiching the part near the rotation end of
When the engagement pin is in the third groove, the two switches are in the same state, and when the engagement pin is in the first groove or the second groove, the two switches are on and off, respectively. It was made to become.

[0005]

Therefore, in the direction detecting device of the present invention, by detecting the state of the two switches, for example, the engaging pin is set to the neutral position in the third groove, and the position in the first groove is set. The movable part faces to the right in the state of, and the movable part faces to the left in the state of the second groove,
As a result, the direction of the movable portion can be easily detected.

Further, since the first groove and the second groove have different diameters, they can be formed by duplicating them, and even when the movable portion rotates in a range exceeding 360 °. It is possible to detect which side the movable part is rotating from the neutral position.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the direction detecting device of the present invention will be described below with reference to the illustrated embodiments. In the illustrated embodiment, the present invention is applied as a direction detecting device for detecting the lateral direction of rotation of the lamp body in the movable lighting device.

In the figure, reference numeral 1 is a movable lighting device.

Reference numeral 2 denotes a base plate, which is fixed to a portion to which the movable lighting device 1 is attached, for example, 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 a rising shape on the outer peripheral edge thereof.

Reference numeral 3 denotes a sleeve fixed on the base plate 2 and having a center hole 4 and an outer peripheral surface 5 which are concentrically formed. 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 the right position detecting portion 6a along an arc that makes a semicircle around the outer surface 5 of the upper surface around the center of the center hole 4.
And a left position detecting portion 6b along a circular arc that makes a half turn around a position near the center hole 4 on the upper surface at a position displaced from the right position detecting portion 6a, and a right position detecting portion. 6a and a linear transition portion 6c connecting between the end portions of the left position detecting portion 6b which are close to each other.

A cylindrical shaft 7 is rotatably fitted in the center 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, and is fitted in the center hole of the shaft 7. The bush 9 is inserted.

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

.., which extend vertically downward, are formed at the left and right ends of the front and rear edges of the main chassis 10, and are raised upward from the 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 entire center 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 rotary shaft 14a protruding downward from the main chassis 10 of the left-right rotation motor 14 is inserted into the coupling hole 15a of the clutch shaft 15 from the flange 17 side, and the screw shaft of the clutch shaft 15 is screwed 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 shape 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.

The 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 are formed at equal intervals on one circumference centered on the center of the central hole 19a.・
.. are formed so as to extend in the axial direction. The storage holes 19b, 19b, ... Are formed as screw holes.

Reference numeral 21 denotes 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 denotes 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 30b of the switch lever 30. The tip ends of the pressed blades 34 and 34 are the switch lever 30. It is elastically attached to the turning end of the.

When the main chassis 10 is in the neutral 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 3
The turning end 30b of 0 has two micro switches 33R,
Located in the middle of 33L, two micro switches 3
Both 3R and 33L are in the off state.

When the main chassis 10 rotates to the right 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. 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 downward cross-sectional shape, the outer diameter of which is the lower end 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). ).

Thus, 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 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 denotes a peripheral wall which is integrally raised from the peripheral edge of the support plate 40 excluding the front end thereof. 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 constituting the front end portion and a cover portion 43 connected to the rear portion of the frame portion 42 and is made of synthetic resin. The frame portion 42 has a horizontally long rectangular frame shape when viewed from the front. The front end and the lower end of the cover portion 43 are open, and the opening 43 at the front end is opened.
The frame portion 42 is connected and fixed to a. And the opening 4 at the lower end
Through 3b, the upper end of the underbody 36 is the cover 4
It is located within 3.

Reference numeral 44 denotes a lamp body, which is defined by a lamp body 45 having a concave portion opening forward, a lens 46 attached to the lamp body 45 so as to cover the front opening thereof, the lamp body 45 and the lens 46. And a light bulb (not shown) arranged in the closed space.

Reference numeral 47 denotes 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, 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 protruding 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 raised upward in a direction extending substantially in the front-rear direction at a substantially central portion of the main chassis 10.

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 connecting 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 denotes a clutch ring in the shape 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 are provided at equal intervals on one circumference centered on the center of the central hole 59a.・
.. are formed so as to extend in the axial direction. The storage holes 59b, 59b, ... Are formed as 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 comprises 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 is 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 has an insertion hole 70 passing 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.
Both end portions 70b, 70b are arranged so as to be located on the same circumference.

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 that 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 rotated up and down via the connecting link 66. Therefore, the lamp body 44 supported by the lamp body bracket 47 is moved up and down. It is rotated.

76U is an upper position detecting microswitch, and 76D is a lower position detecting microswitch.
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.

Therefore, the vertically rotating motor 54 causes the lamp body 4 to
4 is driven to rotate upward, the clutch shaft 55 rotates clockwise in FIG.
As a result, the tip end of the pressing piece 73 of the first link 67 causes the pressed blade 7 of the upper position detecting microswitch 76U to move.
7 is pressed (see FIG. 15), the microswitch 76U
Is turned on, and it is detected that the lamp body 44 is rotated upward. On the contrary, the vertical rotation motor 54
4 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 moves to the lower position. The pressed blade 77 of the detection micro switch 76D is pressed (see FIG. 16), and the micro switch 7
6D is turned on, and it is detected that the lamp body 44 is rotated downward.

Reference numeral 78 denotes a waterproof boot made of rubber in a bellows shape, 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 body 35 is rotated together with the main chassis 10 to rotate the lamp body 44 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.

[0080]

As is clear from the above description, the direction detecting device of the present invention is a direction detecting device for detecting the direction of a movable part rotatably supported by a fixed base part. , A first groove having an arc shape on the base portion,
An arc-shaped second groove having a diameter smaller than that of the first groove and a third groove linearly connecting the first groove and the second groove are provided, and the third groove is connected to the movable portion. An engaging pin projectingly provided at a position near the turning end of a switch lever provided movably is slidably engaged with the groove to sandwich the part of the movable part near the turning end of the switch lever. Position two switches, the two switches are in the same state when the engagement pin is in the third groove, and the two switches are when the engagement pin is in the first groove or the second groove Is turned on and off, respectively.

Therefore, in the direction detecting device of the present invention,
By detecting the state of the two switches, for example, with the engagement pin in the third groove, the neutral position,
The movable part moves to the right while it is in the first groove, and the second part
It is possible to easily detect the direction of the movable section, assuming that the movable section faces the leftward direction while being in the groove.

Further, since the first groove and the second groove have different diameters, they can be formed by being doubled, and even when the movable portion is rotated in a range exceeding 360 °. It is possible to detect which side the movable part is rotating from the neutral position.

It should be noted that the shapes and structures of the respective parts shown in the above embodiments are merely examples of the embodiment for carrying out 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 of an embodiment of the direction detecting device of the present invention, which is a front view.

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.

[Explanation of symbols]

 3 Sleeve (base part) 6 Cam groove (groove) 6a Right position detection part (first groove) 6b Left position detection part (second groove) 6c Transition part (third groove) 10 Main chassis (movable part) 30 Switch Lever 31 Engagement Pin 33R Right Position Detection Micro Switch (Switch) 33L Left Position Detection Micro Switch (Switch)

Claims (1)

[Claims] 1. A direction detecting device for detecting the direction of a movable part rotatably supported by a fixed base part, wherein the base part has an arc-shaped first groove and the first groove. An arc-shaped second groove having a diameter smaller than the arc of the groove and a third groove that linearly connects the first groove and the second groove are provided, and the movable section is rotatably provided. The engaging pin projectingly provided at the position near the turning end of the switch lever is slidably engaged with the groove, and two engaging pins are provided at positions sandwiching the part near the turning end of the switch lever of the movable part. The switch is arranged so that the two switches are in the same state when the engaging pin is in the third groove, and the two switches are on and off when the engaging pin is in the first groove or the second groove. A direction detecting device characterized in that they are set in opposite states.