JPH0455374Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lighting fixture installed on a study desk or the like.

[Conventional technology]

For study desks, etc., a main lighting fixture using a straight tube fluorescent lamp as a light source is attached to a bookshelf installed upright in front of the desk board, and this main lighting fixture illuminates the entire surface of the desk board. ing. However, in order to illuminate a local area on the desk board, apart from such a main lighting fixture, a spotlight lighting fixture using an incandescent light bulb as a light source may be installed as an option.

The spotlight lighting equipment using the above-mentioned incandescent light bulb as a light source, which is used as an auxiliary lamp, is configured to be able to swing freely so that the irradiation position on the partially illuminated desk can be arbitrarily changed.

The conventional structure of such a lighting fixture will be explained based on FIGS. 6 and 7.

In the figure, 50 is a fixed arm, which is fixed to a bookshelf of a study desk (not shown). The fixed arm 50 is made of synthetic resin and has a bellows tube shape, and is provided with an arm holder portion 51 at the tip. An instrument main body 54 is connected to this arm holder portion 51. The main body 54 of the device is made up of synthetic resin covers 55 and 56 that are divided into upper and lower halves and are abutted against each other. A reflector serving as a lamp housing is provided, and an incandescent light bulb is housed in the reflector by being attached to a socket.

The arm holder portion 51 is integrally molded at the tip of the bellows tube-shaped fixed arm 50.
0 is in the shape of a bellows tube, so it is flexible and deformable, and therefore, this arm holder portion 51 can be rotated in the left and right directions as shown by arrow A in FIG. 6 with respect to the fixed arm 50. It's summery.

The tip of the arm holder portion 51 is formed into a substantially T-shape and constitutes a hinge shaft portion 57 . One end of this hinge shaft portion 57 is rotatably accommodated in a bearing portion 58 formed in a lower cover 56 constituting the instrument main body 54. The other end of the hinge shaft portion 57 is rotatably supported by a metal band 59 with a predetermined frictional force. The metal band 59 is attached to the lower cover 56 via a fixing screw 60 and a friction force adjusting screw 61.

Therefore, the arm holder portion 51 and the instrument body 5
4 is relatively rotatable via a hinge shaft portion 57, and the instrument body 54 is rotatable in the vertical direction with respect to the arm holder portion 51, as shown by arrow B in FIG. .

A metal regulating rod 62 is inserted into the bellows tube-shaped fixed arm 50 to maintain a predetermined rigidity since the fixed arm 50 is flexible and deformable. One end of the regulating rod 62 is fixed to the fixed base plate 50a of the fixed arm 50, and the other end is guided into the hinge shaft portion 57. Regulation rod 62
The end portion guided into the hinge shaft portion 57 is the seventh
As shown in the figure, it is bent into a substantially L-shape, and this bent portion serves as a rotation restriction stopper 63. In other words, a gap is formed in the hinge shaft portion 57 in which the rotation regulating stopper 63 can rotate within a predetermined rotation angle range, and the side surfaces of this gap are formed on the stopper surfaces 64, 64.
It is becoming. Therefore, the hinge shaft portion 57 is rotatable within the range where the rotation regulating stopper 63 contacts the stopper surfaces 64, 64. In other words, the amount of rotation of the instrument body 54 shown in the direction of arrow B in FIG. The rotation is restricted by a rotation restriction stopper 63 and stopper surfaces 64, 64.

In a lighting fixture with such a configuration, the fixture body 54 housing the incandescent light bulb is attached to the fixed arm 50.
It is possible to rotate in the horizontal direction indicated by arrow A in FIG. 6 and in the vertical direction indicated by arrow B, so that the partial illumination position can be freely selected and adjusted.

[Problem that the invention attempts to solve]

However, in the case of the above-mentioned conventional structure, the swinging rotation of the instrument body 54 in the left and right direction indicated by the arrow A is
This method relies on the bending deformation of the fixed arm 50 in the shape of a bellows tube, and since the shape of the fixed arm 50 in the shape of a bellows tube is complicated, the molding die is expensive and the number of processing steps is large, but it cannot be used. There are also restrictions on synthetic resin materials.

Further, the hinge shaft portion 57 formed at the tip of the arm holder portion 51 is rotatably attached to the lower cover 56 via a metal band 59, a fixing screw 60, and a friction force adjusting screw 61, so that the number of parts is reduced. There are many parts, and it takes time and effort to assemble.

Further, the amount of vertical rotation of the instrument body 54 indicated by arrow B is regulated by a rotation restriction stopper 63 and stopper surfaces 64, 64. Since it is formed on the metal regulating rod 62 which is inserted through the metal regulating rod 62, the number of parts increases and the metal regulating rod 62 causes an increase in weight.

For this reason, the conventional structure has a large number of parts as a whole, which requires time and effort to assemble, resulting in high costs.

The present invention aims to provide a lighting fixture that has a small number of parts, has a simple structure, requires no assembly effort, and is inexpensive.

[Means for solving problems]

In the present invention, the fixed arm has a rigid structure, and a connecting tool is provided between the fixed arm and the instrument body, and one end of the connecting tool is connected to the fixed arm via a hinge so that it can rotate in the vertical direction. At the same time, the other end is rotatably connected to the device main body by being rotatably sandwiched between the abutting surfaces of the divided cover, and the connecting tool and the fixed arm are In between, a stopper protrusion is provided on one side, and a recess into which the stopper protrusion is inserted rotatably within a predetermined angular range is provided on the other side.
The amount of vertical rotation of this connector with respect to the fixed arm is restricted, and protrusions that collide with each other when a predetermined rotation angle range is reached are provided between the connector and the device body. It is characterized by regulating the amount of rotation of the instrument body in the left and right direction.

[Function] According to the configuration of the present invention, vertical rotation of the instrument body is allowed by the hinge formed between one end of the coupling device and the fixed arm, and horizontal rotation of the instrument body is allowed by the coupling. The other end of the tool is rotatably sandwiched between the abutting surfaces of the split cover, so that the main body of the tool can be rotated in either the vertical or horizontal direction with respect to the fixed arm, Light can be irradiated in any direction. Moreover, the amount of rotation in the vertical direction is regulated by a stopper protrusion and recess provided between the connector and the fixed arm, and the amount of rotation in the left and right direction is regulated by the stopper protrusion and recess provided between the connector and the device body. Each is regulated by a protrusion, so excessive rotation is prevented.

〔Example〕

The present invention will be explained below based on an embodiment shown in FIGS. 1 to 5.

FIGS. 1, 2, and 3 are a sectional view, a perspective view, and a bottom view, respectively, showing the overall structure of the lighting fixture.

In the figure, reference numeral 1 denotes a fixed arm, which is made of synthetic resin and has a rigid hollow tube shape with a predetermined hardness. A mounting base 2 is provided at one end of this fixed arm 1, and this mounting base 2 is fixed to a bookshelf of a study desk (not shown). A connecting tool 3 is connected to the other end of the fixed arm 1 so as to be rotatable in the vertical direction, as will be described later, and an instrument main body 4 is connected to this connecting tool 3.

The instrument main body 4 is constructed by abutting against each other upper and lower synthetic resin covers 5 and 6.
The upper cover 5 has a large number of heat dissipation holes 7 formed on its upper surface, and presser ribs 8 protruding from its inner surface.

The lower cover 6 is provided with a large number of heat radiation holes 9 and a light transmitting window 10 on the lower surface thereof.
Supporting ribs 11... are provided around the periphery.

These upper and lower covers 5 and 6 are abutted against each other, and connecting ribs 12..., 1 are provided on each of the upper and lower covers.
3 are connected by screws 14 to form the instrument main body 4.

A reflector 15 serving as a lamp housing is provided within the instrument body 4. Reflector 1
Reference numeral 5 has an inverted box shape with a reflective surface on the inner surface, and the opening part is fitted into the supporting rib 11 provided around the light transmission window 10 of the lower cover 6, and the ceiling part is connected to the upper cover part 5. Presser rib 8 protruding from the inner surface of 5
..., and is therefore pressed between the upper and lower covers 5 and 6.

This reflector 15 accommodates an incandescent light bulb 16. An incandescent light bulb 16 is attached to a socket 17 fixed to the lower cover 6. In addition,
The socket 17 is connected to a power cord (not shown) that is passed through the instrument body 4, the connector 3, and the fixed arm 1.

When the incandescent bulb 16 is energized and turned on, a portion of the light emitted from the incandescent bulb 16 is directly irradiated downward through the opening of the reflector 15 and the light transmission window 10, and the remaining light is emitted by the reflector 15. After being reflected by the reflecting surface, the light is irradiated downward through the opening of the reflector 15 and the light transmitting window 10.

The connector 3 is connected to the fixed arm 1 as follows.

That is, a bifurcated hinge receiving portion 20 is formed at the tip of the fixed arm 1, and a hinge shaft portion 21 that is fitted between the bifurcated hinge receiving portions 20 is formed on the connector 3. A bearing cylinder portion 22 is formed inside the hinge shaft portion 21 . A support shaft 23 is inserted into the bifurcated hinge receiving portion 20 through the bearing cylinder portion 22 of the hinge shaft portion 21 . Therefore, the hinge shaft portion 2
1 is rotatably connected to the hinge receiving part 20 via a support shaft 23, so that the connecting tool 3 can be rotated in the vertical direction with respect to the fixed arm 1 as shown by arrow B in FIG. It's becoming possible.

Note that the support shaft 23 is a screw shaft, and has an operation knob 24 integrally at one end and is screwed into a nut body 25 at the other end, and these operation knob 24 and nut body 25 are formed into a bifurcated hinge receiving portion. 2
It is provided outside of 0. Therefore, when the operation knob 24 and the nut body 25 are tightened, the interval between the bifurcated hinge receiving portions 20 becomes narrower, and the hinge shaft portion 21
, the frictional force between the hinge receiving portion 20 and the hinge shaft portion 21 increases, thereby preventing relative rotation.

As shown in FIG. 1, a recess 26 is formed in the hinge shaft portion 21 over a predetermined range in the circumferential direction. For such a recess 26, the fixed arm 1
A stopper projection 27 is provided to protrude from the end wall 1a.

The tip of the stopper protrusion 27 enters the recess 26, so that when the connector 3 and the fixed arm 1 rotate relative to each other, the tip of the stopper protrusion 27 comes into contact with the side wall of the recess 26. . This prevents relative rotation between the connector 3 and the fixed arm 1 any further.

On the other hand, such a connector 3 is connected to the instrument body 4 as follows.

That is, as shown in FIG. 4, an engagement groove 30 continuous in the circumferential direction is formed at the tip of the connector 3. As shown in FIG. The abutting surfaces of the covers 5 and 6, which are divided into upper and lower parts of the instrument main body 4, are fitted into the engagement groove 30. That is, notches 31, 31 are formed on the abutting surfaces of the covers 5, 6 to match the engagement grooves 30 of the connector 3, and when these covers 5, 6 are abutted, these notches 31, 31 are formed. Engagement groove 3
0 is fitted. Therefore, the connector 3 is connected to the device body 4
In contrast, it is immovable in the axial direction, but is coupled to be rotatable relative to the circumferential direction of the engagement groove 30. In other words, the main body 4 of the device is the second
It is rotatable in the left and right directions indicated by arrow A in the figure.

The connector 3 is provided with stopper protrusions 32, 32 protruding from the engagement groove 30 as shown in FIG. At least one of the upper cover 5 and the lower cover 6, in this embodiment the upper cover 5, is provided with protrusions 33, 33 that come into contact when the stopper protrusions 32, 32 rotate a predetermined amount. When these stopper protrusions 32, 32 come into contact with the protrusions 33, 33, the instrument main body 4
Rotation of the connector 3 is prevented.

The operation of the embodiment with such a configuration will be explained.

Since the connector 3 can be rotated vertically relative to the fixed arm 1 as shown by arrow B in FIG. It is possible to rotate in the direction. In addition, this device main body 4 is connected to the above-mentioned connector 3 by arrow A.
Since it is rotatable in the left-right direction as shown by , the instrument main body 4 can be rotated relative to the fixed arm 1 in both the left-right direction shown by arrow A and the up-down direction shown by arrow B. , Therefore, since the head can be freely swung, the irradiation position of the partial illumination can be freely selected and adjusted.

In the embodiment of the above structure, since the connector 3 is a universal joint, there is no need to configure the fixed arm 1 to be flexible and deformable, and therefore there is no need to form it into a bellows shape, resulting in a rigid structure. can be adopted. This is not restricted by the shape or material of the fixed arm 1, making it easier to mold and cheaper.

Further, a connecting tool 3 is provided between the fixed arm 1 and the instrument body 4, and this connecting tool 3 connects the fixed arm 1 to a hinge receiving part 20 formed on the fixed arm 1.
Since the hinge shaft portion 21 formed on the connector 3 is rotatably connected via the support shaft 23, this hinge structure is simple. In addition, this connector 3 has an engagement groove 30 formed at the tip of the connector 3 with respect to the instrument body 4, and a notch in the abutting surface of the upper and lower covers 6, 7.
1 and 31 and are rotatably supported, the rotational connection structure of this part is extremely simple.

Furthermore, relative rotation between the connector 3 and the fixed arm 1 is controlled by a recess 26 formed integrally in the hinge shaft 21.
and the stopper protrusion 27 formed integrally with the fixed arm 1, so no special parts are required for this stopper structure.

The rotation of the instrument body 4 and the connector 3 is controlled by stopper protrusions 32, 32 integrally provided on the connector 3.
and protrusions 33, 33 integrally protruding from the upper cover 6.
The stopper structure at this location does not require any special parts because the stopper structure is regulated by the contact.

Therefore, the structure as a whole is simplified.

[Effect of idea]

As explained above, according to the present invention, vertical rotation of the instrument body is allowed by the hinge structure formed between one end of the connector and the fixed arm, and horizontal rotation of the instrument body is allowed. The other end of the connector is rotatably sandwiched between the abutting surfaces of the split cover, so that the main body of the device can be rotated in either the vertical or horizontal direction with respect to the fixed arm. , light can be irradiated in any direction. Moreover, the amount of rotation in the vertical direction is regulated by the stopper protrusion and recess provided between the connector and the fixed arm, and the amount of rotation in the left and right direction is regulated by the respective protrusions provided between the connector and the device body. This prevents excessive rotation.
For this reason, there are advantages such as the number of parts is small, the structure is simplified, assembly time is not required, and costs are low.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention, with Figure 1 being a cross-sectional view of the entire lighting fixture, Figure 2 being a perspective view, Figure 3 being a bottom view, and Figure 4 showing the main parts. FIG. 5 is an enlarged cross-sectional view, FIG. 5 is a view taken along the line indicated by the arrow in FIG. 4, FIGS. 7
The figure is a view taken along the line -- in FIG. 6. DESCRIPTION OF SYMBOLS 1... Fixed arm, 3... Connector, 4... Instrument body, 5... Upper cover, 6... Lower cover, 15...
... Reflector, 16 ... Lamp, 20 ... Hinge receiver, 21 ... Hinge shaft, 23 ... Support shaft, 2
6... Recessed portion, 27... Stopper protrusion, 30... Engagement groove, 31, 31... Notch, 32, 32... Stopper protrusion, 33, 33... Protrusion.

Claims (1)

[Claim for Utility Model Registration] A device formed by a fixed arm fixed to a fixed member and a cover that is attached to the fixed arm so as to be rotatable in two axes, vertically and horizontally, and is divided into upper and lower parts. In a lighting device including a main body and a lamp housed in the device body, the fixed arm has a rigid structure, and a connecting device is provided between the fixed arm and the device body, and one end of the connecting device is connected to the fixed arm. It is connected to the arm via a hinge so as to be rotatable in the vertical direction, and the other end is rotatably sandwiched between the abutting surfaces of the split cover with respect to the instrument body, so that it can be rotated in the left-right direction. The connecting tool and the fixed arm are rotatably connected, and a stopper protrusion is provided on one side, and a recess into which the stopper protrusion is rotatably inserted within a predetermined angular range is provided on the other side; The amount of vertical rotation of this connector with respect to the fixed arm is restricted, and protrusions that collide with each other when a predetermined rotation angle range is reached are provided between the connector and the device body. A lighting fixture characterized by regulating the amount of rotation of the fixture body in the left and right direction.