JPH1125746A - Mechanism for turn regulating range of turning shaft and lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To turn, by a specific angle, beyond the specific angle if necessary by turning a turn angle regulating body within a first prescribed angle range by a first turn regulating means between a supporting body and a turn angle regulating body, and rotating a turn shaft within a second prescribed angle range by a second turn regulating means, between the turning angle regulating means. SOLUTION: When turning shaft 1 is turned against a supporting frame 2, first turn regulating means 6 and a second turn regulating means 7 turn within each prescribed angle range, in the order of ease of turning, or simultaneously. When the first prescribed angle range by the first turn regulating means 6 is set as A, and the second prescribed angle range by the second turn regulating means 7 is set as B, a maximum allowable turning angle at which the turning shaft 1 can turn against the supporting frame 2 is A+B. Thus, the maximum allowable turning angle can be set as 360 deg., and the turn beyond 360 deg. is possible if necessary, because the first prescribed angle range can be set as 60 deg., even if the second prescribed angle range B is about 300 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for restricting the rotation range of a rotation shaft and an illumination device using the same.

[0002]

2. Description of the Related Art FIG. 12 is an exploded perspective view showing a main part of a conventional mounting device for a lighting device.

[0003] This conventional mounting device for a lighting device is disclosed in Japanese Utility Model Publication No. 4-245665.

In the figure, 101 is a mount, 102 is a locking ring, 103 is a rotating shaft, and 104 is an arm.

[0005] The mount 101 comprises half-pieces 101a, 10
1b is connected by a screw or the like, and a partition plate 101c is formed at a lower portion thereof. A storage chamber 101e is formed between the lower wall 101d of the mount 101 and the partition plate 101c. A positioning rib (not shown) is formed on the lower wall 101d of the mount 101.

The locking ring 102 has a pair of cutouts 102a, 102a formed on the periphery thereof, and a locking piece 10 formed on the inner periphery.
2b is formed. And the locking ring 102
The storage chamber 101 is configured such that the pair of cutouts 102a engage with the positioning ribs on the lower wall 101d of the mount 101.
e. 101f is an insertion hole.

The rotating shaft 103 has a flange 103b at a lower end of the shaft portion 103a, and a thread groove 10 on an upper peripheral surface of the shaft portion 103a.
3c is formed, and a flange 103 is formed below the shaft portion 103a.
A stopper 103d is formed at a position separated from b. Further, a groove 103e is formed on the peripheral surface of the shaft portion 103a at a position where the stopper 103d is formed.
Further, the shaft portion 103a has a D-shaped cross section.

The arm 104 is connected to the shaft 10 of the rotating shaft 103.
A through hole 104a conforming to the cross-sectional shape of 3a is formed.

Then, the rotating shaft 103 is inserted through the through hole 104a of the arm 104 from below, and then into the locking ring 102, and the partition plate 101 is inserted into the thread groove 103c of the rotating shaft 103.
What is necessary is just to screw-engage the nut 105 via the washer 106 on the upper surface side of c. After insertion, the rotation shaft is prevented from coming off. When the shaft 103a is inserted into the locking ring 102, if the locking piece 102b is aligned with a part other than the arc, the rotating shaft 103 is rotated with respect to the locking ring 102, and the locking piece 102b is The rotation shaft 103 is rotatable with respect to the locking ring 102 by being introduced into the ring 103e.
The rotation range depends on the locking piece 102b and the stopper 1
03d is restricted to a range of 360 ° or less.

[0010]

However, in the above-described conventional structure, only the angle obtained by subtracting the rotation angle by 360 ° from the sum of the widths of the stopper 103d and the locking piece 102b can be rotated. During the rotation operation of the rotating shaft 103, the stopper 103d and the locking piece 102b
, A large torque acts on them, so that their width cannot be reduced in terms of strength.

[0011] Therefore, since it is possible to rotate only about 300 ° at most, there is no problem with respect to the IEC standard contents that the electric wire inserted into the rotating shaft must not be twisted more than 360 °. There is a problem that an unirradiable area occurs in a horizontal plane.

In order not to generate an unirradiable area on the horizontal plane of the lighting equipment, it is preferable to be as close as possible to 360 °,
If possible, it is necessary to secure a pivotable angle up to just 360 °.

The present invention is applicable to 360 °, if necessary, 360 °.
An object of the present invention is to provide a rotation range restricting mechanism of a rotation shaft that can be manufactured so as to be able to rotate more than ゜ and an illumination device using the same.

[0014]

According to the first aspect of the present invention, there is provided a rotation range regulating mechanism for a rotation shaft, the rotation shaft having a peripheral step formed in the vicinity of one end; A support frame for rotatably receiving and supporting an end of the rotation shaft; an end portion of the rotation shaft being inserted into the ring, and the support frame being cooperated between the outer peripheral portion and the support frame. A first rotation restricting means for enabling rotation only within a first predetermined angle range, and a second predetermined rotation restricting means which cooperates between an end portion and an inner peripheral portion of the rotation shaft. A second rotation restricting means for relatively rotating only within an angle range; a rotation angle restriction body disposed in the support frame; and an end of the rotation shaft with respect to the support body. And a holding body for supporting while applying an appropriate frictional force.

In the present invention and each of the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified.

First, the rotating shaft will be described.

The term "rotation" is used to mean that even if the axis is 360 ° or more, it rotates within an angle range of less than 2 rotations. The rotation shaft may be hollow or solid inside. The length of the shaft is arbitrary.

The peripheral step near one end of the rotating shaft may be formed by reducing the diameter of one end of the rotating shaft.
It can be formed by providing a flange-shaped portion having a diameter larger than the shaft diameter.

Further, a thread groove and a non-circular cross-section for attaching a pressing body to the rotating shaft can be formed at one end of the rotating shaft as required.

At the end of the rotation shaft, a plurality of projections or grooves, for example, two as required, which constitute the second rotation restriction means in cooperation with the inner peripheral portion of the rotation angle restriction body, are equally distributed. Formed.

Next, the bearing frame will be described.

The support frame is sandwiched between a peripheral step portion of the rotation shaft and a pressing body to support the rotation shaft. And preferably, it can be formed in a box shape so as to be able to accommodate the rotation angle regulating body and the holding body in order to improve the appearance.

Further, the support frame can have other functions according to the use of the rotating shaft. For example, when the rotating shaft is used as an arm for supporting a lamp body in the lighting device, the support frame can be provided with a function of a power supply end.

Further, in order to make the support frame support the rotation shaft, the support frame can be divided into two parts, and the rotation shaft can be held between them. However, if necessary, the rotating shaft can be supported even if an indivisible piece such as a flange is used.

The turning angle regulating body will be described.

The rotation angle regulating body provides a first rotation regulating means formed between the outer peripheral portion and the support frame, and also has a structure between the inner peripheral portion and the projection or groove of the rotating shaft. A second rotation restricting means is provided.

That is, the first rotation restricting means includes a projection or a groove formed on the support frame and a groove or a groove formed on the outer peripheral portion of the rotation angle restrictor and engaging with the protrusion or the groove of the support frame. It is composed of projections. If necessary, a plurality of, for example, two first rotation restricting means may be arranged around the rotation axis, preferably evenly.

Thus, the rotation angle regulating body can rotate within a range of the first predetermined angle with respect to the support frame by the first rotation regulating means.

The second rotation restricting means engages with a projection or groove formed at an end of the rotation shaft and an inner periphery of the rotation angle restriction body and engages with the projection or groove of the rotation shaft. Groove or projection. A plurality of, for example, two second rotation restricting means can be disposed around the rotation axis, if necessary, preferably evenly.

Thus, the rotating shaft can be rotated by the second rotation restricting means within the second predetermined angle range relative to the rotation angle restricting body. Here, the term “relative” means that the angle range in which the rotation axis can rotate is relative to the rotation angle regulating body, and is not an absolute rotation with respect to the support frame.

Further, the pressing member will be described.

The holding body may have any structure as long as it can support the rotating shaft by applying an appropriate frictional force to the bearing frame. Further, the frictional force may act indirectly via the rotation angle regulating body or may act directly on the bearing frame.

Finally, the operation will be described.

When the rotating shaft is rotated with respect to the support frame against the frictional force given by the pressing body, the first and second rotation restricting means are rotated. Of these, the one that rotates easily or both simultaneously rotate within a predetermined angle range at the same time. That is, the first rotation restricting means permits rotation within the first predetermined angle range. Further, the second rotation restricting means allows rotation within the second angle range.

Therefore, the first predetermined angle range by the first rotation restricting means is defined as A, and the second rotation restricting means
It can be understood from the above description that when the predetermined angle range of B is B, the maximum allowable rotation angle at which the rotation shaft can rotate with respect to the support frame is A + B.

Therefore, even if the second predetermined angle range B
However, even if the angle is at most about 300 °, the first predetermined angle range can be set to 60 °, so that it is possible to easily realize the maximum allowable rotation angle of just 360 °.

If necessary, it is also possible to set a maximum allowable rotation angle exceeding 360 °.

Of course, it is of course possible to set a maximum allowable rotation angle of less than 360 °.

When the user releases his / her hand from the rotated rotation shaft within the range of the maximum allowable rotation angle described above, the rotation shaft generates a certain amount of torque due to the frictional force applied by the pressing body. Can be maintained still.

According to a second aspect of the invention, there is provided a rotation range regulating mechanism according to the first aspect.
Is characterized by comprising a projection provided on one of the support frame and the rotation restricting body and a groove provided on one of the other and engaging with the projection.

The present invention defines a specific structure of the first rotation restricting means.

When a projection is formed on the support frame, a groove is formed on the rotation angle restricting means. Conversely, when forming a groove in the support frame, a protrusion is formed in the rotation angle regulating body.

The two are in a relative relationship, and the function of regulating the rotation angle is the same in any case.

According to a third aspect of the present invention, there is provided the turning range regulating mechanism according to the first or second aspect, wherein the second turning restricting means comprises an end portion of the turning shaft and It is characterized by comprising a projection formed on one of the rotation restricting bodies and a groove formed on one of the other and engaging with the projection.

The present invention specifies a specific structure of the second rotation restricting means.

When a groove is formed in the rotation angle regulating body, a projection is formed on the rotation shaft. Conversely, when a projection is formed on the rotation angle regulating body, a groove is formed on the rotation shaft.

The two are in a relative relationship, and the function of regulating the rotation angle does not change in any case.

According to a fourth aspect of the present invention, there is provided a rotation angle regulating mechanism according to any one of the first to third aspects, wherein the pressing member is fixed to an end of the rotating shaft. And a washer non-rotatably mounted on the rotation shaft between the nut, the rotation restricting body, and the nut.

The present invention specifies a specific structure of the holding member.

In order to mount the nut on the rotating shaft, it is necessary to form a thread groove in a required portion of the rotating shaft in advance.

In order to mount the washer on the rotation shaft so as not to rotate, the shaft section of the mounting portion may be formed in a non-circular shape such as a D-shape or a drum shape.

Further, a partition plate can be integrally formed in the support frame to form a storage chamber for storing the rotation angle regulating body. In such a case, the holding body is applied to the partition plate. You only need to make contact.

In addition, in addition to the above, a nylon washer or the like can be attached.

According to a fifth aspect of the present invention, there is provided a turning range regulating mechanism for a rotating shaft according to any one of the first to fourth aspects, wherein the rotating shaft is hollow. An insulating coated conductor inserted inside the rotating shaft;

In the present invention, since the rotating shaft is hollow and the insulated conductor is inserted therein, the rotating angle range is about 3
By setting the angle to 60 °, the IEC standard is satisfied, and there is no possibility that the insulated wire is twisted and disconnected. In addition, since one rotation is possible, a non-rotatable range does not occur.

According to a sixth aspect of the present invention, there is provided a lighting device for a rotating shaft, wherein: a hollow rotating shaft having a peripheral step formed in the vicinity of one end; A supporting frame rotatably housed and supported; a first supporting frame cooperating with the supporting frame;
The first rotation restricting means that enables rotation only within the predetermined angle range and the end of the rotation shaft is inserted and cooperates with the protrusion of the rotation shaft to relatively move the rotation shaft to the second. A second rotation restricting means for relatively rotating only within a predetermined angle range is provided, and a rotation angle restriction body disposed in a support frame; A presser body for supporting while applying an appropriate frictional force thereto; a feeding end integrally formed with the support frame; an insulated conductor inserted into the rotating shaft and having one end connected to the feeding end; A lamp mounted on the other end of the rotating shaft and connected to the other end of the insulated conductor.

The power supply terminal is a terminal having a power receiving function for a power supply in order to supply power to the lamp body via the insulated conductor. Specifically, a terminal block as a connection function for a power supply line, a plug for a wiring duct, and the like are applicable.

According to the present invention, the rotation range regulating mechanism for the rotation shaft according to the first aspect is applied to a lighting device.

The configuration of the lamp body is not particularly limited because it changes depending on the type of the lighting device. But including the lamp,
A reflector, a socket, a translucent cover, and the like are provided as necessary.

The lamp body may be directly mounted on the other end of the rotating shaft, or may be indirectly mounted such that the arm is fixed to the other end of the rotating shaft and mounted on the other end of the arm. May be performed.

The lighting device can be applied to a spotlight, a lighting stand, a floodlight, and the like.

A lighting device according to a seventh aspect of the present invention is the lighting device according to the sixth aspect, wherein the power supply end is a plug for a wiring duct.

The wiring duct plug is used to receive power from the wiring duct. The plug is connected to a hook portion that mechanically hooks the wiring duct, a contact blade that presses against a conductor in the wiring duct, and connects the insulating coated conductor. It has terminals for connection.

The present invention is suitable for a spotlight connected to a wiring duct.

The lighting device according to an eighth aspect of the present invention is the lighting device according to the sixth aspect, wherein the power supply end is a flange.

The flange is used for fixing the position on a mounting surface such as a ceiling and mounting the lighting device. A terminal or a terminal block for connecting the power supply line and the insulated wire on the load side is provided inside the dish-shaped frame.

The present invention is suitable for a spotlight fixed to a ceiling.

According to a ninth aspect of the present invention, in the illuminating device according to any one of the sixth to eighth aspects, the lamp body comprises:
At the other end of the rotating shaft, a main body rotatable in a vertical plane, a socket mounted on the main body, a reflector arranged so that a top opening is located near the socket, and a lamp mounted on the socket. It is characterized by having.

The present invention specifies a configuration of a lamp suitable for a spotlight.

The main body is made of metal such as synthetic resin or aluminum die cast, and the structure differs depending on the desired design and function.

The required socket is used depending on the type of lamp used.

As the reflector, a reflector having a heat ray transmitting / visible light reflecting film composed of a multilayer interference film on the inner surface of a metal or glass substrate, an aluminum reflecting surface, or the like can be used.

As the lamp, a halogen bulb, a reflection type shield beam bulb, a reflection type bulb, a small high-intensity discharge lamp or the like with or without a visible light transmission / heat ray reflection film is mainly used.

[0074]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an enlarged sectional view of a main part showing a first embodiment of a rotation range restricting mechanism of a rotation shaft and an illumination device according to the present invention.

FIG. 2 is a sectional view taken along the line II-II 'of FIG.

In each figure, 1 is a rotating shaft, 2 is a support frame,
Reference numeral 3 denotes a rotation angle regulating body, 4 denotes a pressing body, and 5 denotes a wiring duct plug.

The rotation shaft 1 will be described.

The rotating shaft 1 has a peripheral step portion 1a near the end, and a first small-diameter portion 1b, a second small-diameter portion 1c, a projection 1d, and a thread groove 1e formed at the end portion. A hollow portion 1f is formed along the line.

The peripheral portion 1a is formed by the first small diameter portion 1b.

One projection 1d is formed on the second small diameter portion 1c.

Other structures of the rotating shaft 1 are shown in FIGS.
This will be described with reference to FIG.

FIG. 3 is a front view showing a rotation axis in the first embodiment of the rotation range regulating mechanism and the illumination device of the rotation axis of the present invention.

FIG. 4 is a left side view of the same.

FIG. 5 is a plan view of the same.

At the end of the rotating shaft 1, a non-circular section 1g is further formed. The non-circular section 1g has a second shape.
The small diameter portion 1c is formed.

The other end of the rotating shaft 1 has a short cylindrical portion 1
h are integrally formed. And the hollow part 1f is formed penetrating the short cylindrical part 1h.

The bearing frame 2 will be described.

The support frame 2 has a cylindrical box shape divided into two along the axis, and has an insertion hole 2a, a storage chamber 2b, and a projection 2c.

The insertion hole 2a is formed on the lower surface straddling the split seam, and the first small diameter portion 1b of the rotating shaft 1 is inserted therethrough. Then, the peripheral step portion 1 a of the rotating shaft 1 contacts the lower surface of the support frame 2.

The storage chamber 2b is formed adjacent to the insertion hole 2a, and stores the rotation angle regulating body 3.

The projection 2c is, as shown in FIG.
b.

The turning angle regulating body 3 will be described.

FIG. 6 is a front view showing a rotation angle regulating body in the first embodiment of the rotation range regulating mechanism of the pivot shaft and the lighting device according to the present invention.

The rotation angle restricting body 3 has an annular shape, and has a pair of arc-shaped grooves 3a, 3a formed on an outer peripheral portion, and a substantially annular groove 3b formed on an inner peripheral portion.

The rotation angle regulating body 3 is housed in the storage chamber 2b of the support frame 2 by engaging the groove 3a of the rotation angle regulating body 3 with the projection 2c.

On the other hand, the projection 1d of the rotation shaft 1 is engaged with the groove 3b, and the end of the rotation shaft 1 is inserted into the ring of the rotation angle regulating body 3.

The projection 2c of the support frame 2 and the rotation angle regulating body 3
Groove 3a constitutes first rotation restricting means 6.

The protrusion 1d of the rotating shaft 1 and the groove 3d in the inner peripheral portion of the rotating angle regulating body 3 constitute the second rotating regulating means 7.

The holding body 4 will be described.

The holding member 4 includes a nut 4a and a washer 4b.
And a washer 4c.

The nut 4a is screwed into a thread groove 1e formed at the end of the rotating shaft 1.

FIG. 7 is a front view showing the washer in the first embodiment of the rotation range regulating mechanism and the illumination device of the rotation shaft according to the present invention.

The washer 4b has a non-circular hole 4b1 formed in the center thereof, and the hole 4b1 is mounted on a non-circular section 1g formed in the second small diameter portion 1c at the end of the rotating shaft 1.

Then, the pressing body 4 is placed on the rotation angle regulating body 3 by the wave washer 4c, the washer 4b and the nut 4a.
, And tighten the nut 4a.
The elastic force c is transmitted to the support frame 2 via the rotation angle regulating body 3 and acts as a frictional force between the rotation shaft 1 and the support frame 2.

The plug 5 for the wiring duct will be described.

As shown in FIG. 1, the wiring duct plug 5
Are integrally formed with the bearing frame 1. And it is provided with hook part 5a, a pair of contact blades 5b, and terminal 5c.

The hook 5a is formed integrally with the support frame 1 and protrudes upward from the support frame 1.

Each of the pair of contact blades 5b has a tip protruding left and right from the hook 5a in the drawing, and a base constituting a terminal 5c inside the support frame 1.

The other configuration will be described. Reference numeral 8 denotes an insulated conductor, which is inserted into the hollow portion 1f of the rotating shaft 1 and connected to the terminal 5c.

The operation will be described.

The rotating shaft 1 is pressed against the support frame 2
2, the second rotation restricting means 7 rotates the maximum angle A between the protrusion 1d of the rotation shaft 1 and the rotation angle restricting body 3 in FIG. Can be.

On the other hand, the first rotation restricting means 6 allows the rotation of the maximum angle B between the groove 3a of the rotation angle restricting body 3 and the projection 2c of the support frame 2.

As a result, between the rotating shaft 1 and the support frame 2, the maximum angle A + B can be rotated.

Therefore, by setting the maximum angles A and B as desired, it is possible to rotate to an arbitrary angle before and after 360 °.

FIG. 8 is a sectional view similar to FIG. 2 showing a second embodiment of the rotation range limiting mechanism of the rotation shaft according to the present invention.

In the figure, the same parts as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

The present embodiment differs from the first embodiment in the first rotation restricting means 6 '. That is, the groove 2c is formed in the support frame, and the projection 3c is formed in the rotation angle regulating body 3.

FIG. 9 is a partial center sectional side view of a spotlight which is an embodiment of the illumination device of the present invention.

In the figure, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. 9 is a main body, 10 is a socket, 11 is a reflector, 12 is a lamp, and 13 is a light shielding cylinder.

The main body 9 is made of aluminum die-cast, and is rotatably mounted on the short cylindrical portion 1h of the rotary shaft 1 in a vertical plane.

The socket 10 is provided in the main body 9 and is connected to the other end of an insulated conductor (not shown).

The reflector 11 has the top opening 11a located near the socket 10.

The lamp 12 is mounted on the socket 10,
The light emission center is located substantially at the focal point of the reflector 11.

The light-shielding tube 13 is attached to the main body 9 so as to face the reflector 11 and supports a light-shielding cap 13a that covers the head of the lamp 12. In addition, a protective glass can be mounted on the front surface of the light shielding tube 13.

FIG. 10 is a side view showing a flange in another embodiment of the lighting device of the present invention.

FIG. 11 is a front view of the same.

In the figure, reference numeral 14 denotes a flange main body, which is provided with a rotation angle restricting body and a holding body at an end of the rotation shaft inserted therein through an insertion hole 14a formed in the center of the lower surface, thereby rotating the rotation shaft. It is rotatably supported within a predetermined angle.

The flange body 14 houses a terminal block and the like.

[0130]

According to the first to fifth aspects of the present invention, the rotation angle regulating body can be rotated between the support body and the bearing within the range of the first predetermined angle by the first rotation regulating means. In addition, the rotation axis can be rotated between the rotation angle regulating body and the rotation angle regulating body within the range of the second predetermined angle by the second rotation regulating means.
It is possible to provide a rotation range restricting mechanism of the rotation shaft that can rotate to an arbitrary angle before and after ゜.

According to the second aspect of the present invention, since the first rotation restricting means is constituted by the projection and the groove engaged therewith, the rotation range restricting mechanism of the rotation shaft having a simple structure is provided. Can be provided.

According to the third aspect of the present invention, since the second rotation restricting means is constituted by the projection and the groove engaged with the projection, the rotation range restricting mechanism of the rotation shaft having a simple structure is provided. Can be provided.

According to the fourth aspect of the present invention, the holding body includes the nut, the washer, and the corrugated washer, so that it is possible to provide a mechanism for restricting the rotation range of the rotating shaft which is easy to assemble. .

According to the fifth aspect of the present invention, in addition to the fact that the rotating shaft is hollow and the insulated conductor is inserted therein, the insulated covered conductor is not twisted, so that the rotating shaft is hard to be disconnected. A regulatory mechanism can be provided.

According to each of the sixth to ninth aspects of the present invention, it is possible to provide an illuminating device in which the insulated conductor inserted into the rotating shaft is not easily twisted due to kinks and has no angle range in which irradiation is impossible in a horizontal plane. it can.

According to the seventh aspect of the present invention, in addition to the provision of the wiring duct plug, it is possible to provide a lighting device that can be mounted on the wiring duct.

According to the eighth aspect of the present invention, the provision of the flange in addition to the above makes it possible to provide a lighting device which can be directly mounted on the ceiling.

According to the ninth aspect of the present invention, it is possible to provide a lighting device suitable for a spotlight.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of a main part showing a first embodiment of a rotation range restricting mechanism and a lighting device of a rotation shaft according to the present invention.

FIG. 2 is a sectional view taken along the line II-II ′ of FIG.

FIG. 3 is a front view showing the rotation axis in the rotation range regulating mechanism and the illumination device according to the first embodiment of the present invention;

FIG. 4 is a left side view of the same.

FIG. 5 is a plan view of the same.

FIG. 6 is a front view showing a rotation angle restricting body of the first embodiment of the rotation range restricting mechanism and the illumination device of the present invention.

FIG. 7 is a front view showing a washer in the first embodiment of the rotation range limiting mechanism of the rotation shaft of the present invention.

FIG. 8 is a cross-sectional view similar to FIG. 2, showing a second embodiment of a rotation range restricting mechanism and a lighting device of the rotation shaft according to the present invention;

FIG. 9 is a partial central cross-sectional side view of a spotlight which is an embodiment of the illumination device of the present invention.

FIG. 10 is a side view showing a flange in another embodiment of the lighting device of the present invention.

FIG. 11 is a front view of the same.

FIG. 12 is an exploded perspective view of a main part showing a conventional mounting device for a lighting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotating shaft 1f ... Hollow part 1g ... Non-circular section 2 ... Bearing frame 2b ... Storage chamber 2c ... Projection 3 ... Rotation angle regulating body 3a ... Groove 3b ... Groove 6 ... First rotation regulating means 7 ... Second rotation restricting means A: first predetermined angle range B: second predetermined angle range

Claims (9)

[Claims] A rotating shaft having a peripheral step formed near one end;
A supporting frame in which the peripheral step abuts on the outer surface and rotatably accommodates and supports the end of the rotating shaft; an annular portion having the end of the rotating shaft inserted into the ring, the outer peripheral portion and the bearing; First rotation restricting means for enabling rotation only within a first predetermined angle range with respect to the support frame by cooperation between the frames, and cooperation between the end portion and the inner peripheral portion of the rotation shaft. A second rotation restricting means for relatively rotating the rotation axis only within a second predetermined angle range, and a rotation angle restriction body disposed in the support frame; A holding body for supporting the end of the shaft while applying an appropriate frictional force to the bearing body; and a rotation range regulating mechanism for the rotation shaft. The first rotation restricting means comprises a projection provided on one of the support frame and the rotation restriction body and a groove provided on one of the other and engaging with the projection. The mechanism for restricting a rotation range of a rotation shaft according to claim 1. The second rotation restricting means comprises a projection formed on one of the end of the rotation shaft and the rotation restriction body and a groove formed on one of the other and engaging with the projection. 3. A mechanism for restricting the rotation range of a rotation shaft according to claim 1, wherein: 4. The holding body includes a nut fixed to an end of the rotating shaft, a washer non-rotatably mounted on the rotating shaft between the rotation restricting body and the nut, and a wave washer. The rotation range restricting mechanism for a rotation shaft according to any one of claims 1 to 3. 5. The rotating shaft according to claim 1, wherein the rotating shaft is hollow; and the insulating shaft conductor is inserted into the rotating shaft. Shaft rotation range regulating mechanism. 6. A hollow rotary shaft having a peripheral step formed in the vicinity of one end thereof; and a supporting frame for supporting the end of the rotary shaft rotatably received by the peripheral step abutting against the outer surface. First rotation restricting means for cooperating with the support frame and allowing rotation only within a first predetermined angle range with respect to the support frame, and the end of the rotation shaft being inserted into the projection of the rotation shaft; A second rotation restricting means for cooperating with the rotation shaft to relatively rotate the rotation shaft only within a second predetermined angle range, and the rotation provided in the support frame is provided. An angle regulating body; a holding body for supporting the end of the rotating shaft while applying an appropriate frictional force to the bearing body; a power supply end formed integrally with the bearing frame; And a lamp body attached to the other end of the rotating shaft and connected to the other end of the insulated conductor. Lighting apparatus according to symptoms. 7. The lighting device according to claim 6, wherein the power supply end is a plug for a wiring duct. 8. The lighting device according to claim 6, wherein the power supply end is a flange. 9. A lamp body comprising: a main body rotatable in a vertical plane at the other end of the rotary shaft; a socket mounted on the main body; and a reflector arranged such that a top opening is located near the socket. The lighting device according to any one of claims 6 to 8, further comprising a lamp mounted on the body and the socket.