JP3582080B2 - Spotlight - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a spotlight capable of turning a lamp in an arbitrary direction.
[0002]
[Prior art]
Conventionally, by attaching a lamp using a joint that allows rotation in a plane substantially parallel to the construction surface and in a plane substantially perpendicular to the construction surface, the lamp can be oriented in any direction. Spotlights have been proposed. At present, in this type of spotlight, an electric path between the base mounted on the construction surface and the lamp is formed by an electric wire connecting the base and the lamp. The electric wire forming the electric path is exposed outside between the base and the lamp.
[0003]
[Problems to be solved by the invention]
In the above-described related art, since the electric wire is used to form the electric path to the lamp, the movable range of the lamp is restricted by the length of the electric wire. Therefore, in order to prevent disconnection of the electric wire, it is necessary to provide a stopper for regulating the movable range of the lamp in the joint. As a result, when adjusting the direction of the lamp near both ends of the movable range, if the desired position is on the opposite side with respect to the position restricted by the stopper, if the stopper does not exist, the desired position can be set at a small rotation angle. In spite of the fact that the lamp can be adjusted in a short time, the rotation angle to the desired position becomes large due to the presence of the stopper, which causes a problem that the operation of adjusting the direction of the lamp becomes troublesome.
[0004]
In addition, since the electric wires are exposed to the outside, there is a problem that the appearance is impaired, and the tension stopper provided to prevent the tension of the electric wires from acting on the electrical connection portion with the lamp or the like is provided. A fixing tool such as a screw is required for fixing, and there is a problem that the number of parts increases.
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, and to facilitate adjustment of the direction of a lamp by preventing the rotation range of a joint from being restricted, and to form an electric path to the lamp without using an electric wire. By doing so, it is intended to provide a spotlight in which the appearance is improved and the number of components is reduced by eliminating the need for components used for stopping the tension of electric wires.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 includes a base attached to a construction surface, a lamp for holding a lamp, an arm interposed between the base and the lamp, and a base and the arm. A first joint for connecting between the two, and a second joint for connecting between the arm and the lamp; one of the first joint and the second joint connects the two members to be connected substantially in parallel with the construction surface; The first joint and the second joint are respectively rotatably connected to each other in a plane substantially perpendicular to the construction surface. A pair of rotating members, and a pair of contacts made of conductive metal plates fixed to each of the rotating members and slidably in contact with each other over the entire circumference of the rotating range of the rotating members. through the electric path is contact of each joint through an arm and a lamp At least one of the joints includes a cylindrical body having an inner cylinder and an outer cylinder formed coaxially about a center of rotation, and two pairs of contacts, each pair of contacts being a center of rotation. Are arranged coaxially with respect to the center, and each sliding contact portion of the pair of contacts is located with the inner cylinder of the cylinder interposed therebetween .
[0006]
According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of first contacts are coaxially disposed around a center of rotation on one of the rotating members constituting each joint, and the other is provided on the other. A plurality of second contacts respectively contacting the first contacts are disposed on the rotating member, and an electric path formed between the base, the arm, and the lamp includes a base, an arm, and a lamp. It is characterized by being built in.
[0007]
[Action]
According to the first aspect of the present invention, the contacts made of a conductive metal plate are respectively fixed to the pair of rotating members forming the joint, and the contacts provided on both the rotating members are fixed to the entire rotating range of the rotating members. Since they are slid on each other over the circumference, it is possible to rotate both rotating members of the joint indefinitely. That is, as compared with the conventional configuration using an electric wire for the electric path to the lamp, there is no need to restrict the rotation range by providing a stopper in order to prevent the disconnection of the electric wire. As a result, it is easy to adjust the direction of the lamp.
[0008]
According to the second aspect of the invention, the first contact provided on one of the rotating members is coaxially arranged about the center of rotation, and the second contact provided on the other rotating member is provided on the first rotating member. By making elastic contact with the contacts, both contacts can be brought into sliding contact over the entire circumference of the rotation range of the rotation member. In addition, since the electric path formed between the base, the arm, and the lamp is built in the base, the arm, and the lamp, the electric circuit can be finished without exposing the electric path to the outside. As described above, since there is no need to provide an electric wire that is exposed to the outside as an electric path, there is no need to provide a member for stopping the tension of the electric wire, which leads to a reduction in the number of components.
[0009]
【Example】
FIG. 2 shows the external shape of the present invention. A base 1 is fixed to a construction surface 6 such as a ceiling surface, and a lamp 3 is coupled to the base 1 via an arm 2. The base 1 and the arm 2 are formed in a substantially cylindrical shape, and are connected via a first joint 4 that allows the base 1 and the arm 2 to be rotatable in a plane substantially parallel to the construction surface 6. . Further, the lamp 3 includes a cylindrical housing 31 having an open surface, and a lamp socket 32 for holding a lamp (not shown) is built in the housing 31. The lamp 3 is connected to the arm 2 via a second joint 5 that is rotatable in a plane substantially perpendicular to the construction surface 6.
[0010]
As shown in FIG. 1, the first joint 4 includes a friction ring 41 held at an end of the base 1, a cylindrical holding base 42 inserted through the friction ring 41, and a holding base 42. And a cylindrical tightening ring 44 screwed into the friction ring 41. The holding base 42 and the holding shaft 43 are formed of an insulating material such as a synthetic resin.
[0011]
The base 1 is formed in a cylindrical shape, and an inner flange piece 11 is formed on an inner peripheral side of a lower end. A circular through-hole 12 is formed in the center of the inner flange piece 11, and an annular rib 13 having a smaller projecting dimension than the inner flange piece 11 is formed on the inner peripheral surface of the base 1 above the inner flange piece 11. It is protruded. The friction ring 41 has a cylindrical portion 41 a inserted into the through-hole 12, and a disk-shaped portion protruding from an outer peripheral surface of an upper end portion of the cylindrical portion 41 a and having a peripheral portion sandwiched between the inner flange piece 11 and the annular rib 13. , A disc-shaped mounting plate 41c protruding from the outer peripheral surface of the lower end of the cylindrical portion 41a and facing the friction plate 41a with the inner flange piece 11 interposed therebetween, and a cylindrical peripheral edge of the mounting plate 41c. And a screw cylinder 41e having a male screw portion 41d formed on the outer peripheral surface thereof. In order to mount the friction ring 41 having such a shape on the base 1, for example, the base 1 may be formed by connecting a pair of half bodies. A female screw portion 44 a formed on the inner peripheral surface of the tightening ring 44 is screwed into a male screw portion 41 d provided on the screw cylinder 41 e of the friction ring 41. Engagement pieces 44b project radially inward from the entire periphery of the lower end edge of the tightening ring 44, and the lower end side of the flange 21 formed on the upper end edge of the arm 2 contacts the engagement piece 44b. The upward movement of the tightening ring 44 with respect to the arm 2 is restricted. Here, the inner diameter of the fastening ring 44 is set smaller than the outer diameter of the base 1.
[0012]
With the above-described configuration, the base 1 and the arm 2 are connected via the friction ring 41 and the tightening ring 44, and the arm 2 is connected to the base 1 with the friction ring 41 as a rotation axis. In a plane substantially parallel to. When the tightening ring 44 is tightened, the friction ring 41 is pulled toward the arm 2 by the pressing of the tightening ring 44 against the base 1, and the contact pressure between the friction plate 41 b and the inner flange piece 11 increases. As a result, the frictional force between the friction ring 41 and the base 1 increases, and the arm 2 becomes difficult to rotate with respect to the base 1. Conversely, if the fastening ring 44 is loosened, the arm 2 can be easily rotated with respect to the base 1.
[0013]
The holding base 42 includes an inner cylinder 42a inserted into the cylindrical portion 41a of the friction ring 41, a connecting plate 42b protruding along the lower surface of the mounting plate 41c on an outer peripheral surface of an intermediate portion of the inner cylinder 42a, and a connecting plate. An outer cylinder 42c projecting from the lower surface of the peripheral part of the inner cylinder 42b and surrounding the outer periphery of the lower end of the inner cylinder 42a is formed continuously and integrally (see FIG. 3). Terminal pieces 45a, 46a of two contacts 45, 46 formed of a conductive metal plate are inserted into the inner cylinder 42a in a form separated from each other. As shown in FIG. 4, the contact 45 is formed in a shape in which a terminal piece 45a is continuously and integrally protruded from one location on the periphery of a ring-shaped contact ring 45b. The contact ring 45b is arranged along the inner peripheral surface of the outer cylinder 42c, and the terminal piece 45a is arranged along the lower surface of the connecting plate 42b and penetrates the partition of the inner cylinder 42a to be introduced into the inner cylinder 42a. Is done. Further, as shown in FIG. 5, the contact 46 is formed in a shape in which a contact piece 46c is continuously and integrally provided at a lower end of a terminal piece 46a via a substantially rectangular spring portion 46b. A notch 42d is formed at the upper end of the holding base 42 to expose the upper ends of the terminal pieces 45a and 46a. The terminal pieces 45a and 46a are fixed to the holding base 42 by being sandwiched between the outer peripheral surface of the holding shaft 43 inserted into the inner cylinder 42a of the holding base 42 and the inner peripheral surface of the inner cylinder 42a. You. Further, a flange-shaped locking piece 43a is formed integrally and continuously at the upper end portion of the holding shaft 43, and the locking piece 43a abuts on the upper end surface of the inner cylinder 42a of the holding base 42, so that the holding base 42 is The holding shaft 43 is positioned accordingly. The contact piece 46c of the contact 46 is located below the lower end surface of the holding shaft 43.
[0014]
On the upper end surface of the arm 2, a cylindrical positioning projection 22 inserted into the inner cylinder 42 a of the holding base 42 and a cylindrical partition cylinder 23 surrounding the outer periphery of the inner cylinder 42 a are protruded. . A pair of electric circuit boards 7 formed of a conductive metal plate is inserted into the arm 2, and the upper end of each electric circuit board 7 protrudes from the upper end surface of the arm 2 and is integrally connected to the contacts 47 and 48, respectively. I do. The contact 47 resiliently contacts the inner peripheral surface of the contact ring 45b of the contact 45, as shown in FIG. Here, the electric circuit board 7 continuing to the contact 47 penetrates the partition wall of the partition tube 23, and the contact 47 is arranged along the outer peripheral surface of the partition tube 23, and the upper end of the contact 47 is Has an elasticity in a direction away from the outer peripheral surface. As shown in FIG. 5, the contact 48 is formed in a substantially L shape so as to extend along the side surface from the upper surface of the positioning protrusion 22. A contact piece 46c of the contact 46 elastically contacts the contact 48.
[0015]
As described above, the contact ring 45b and the contact piece 46c are coaxially arranged, the contact 47 resiliently contacts the contact ring 45b, and the contact piece 46c resiliently contacts the contact 48. Therefore, when the arm 2 is rotated with respect to the base 1, the contact state between the contact ring 45b and the contact 47 and between the contact piece 46c and the contact 48 is maintained at any position. The base 1 and the arm 2 can be rotated without limitation. Since the rotation range of the arm 2 with respect to the base 1 is not limited, it is easy to rotate the arm 2 in a desired direction.
[0016]
As shown in FIG. 6, the second joint 5 for connecting the lower end of the arm 2 and the lamp 3 includes a protruding plate 51 projecting from the upper surface of one end of the lamp main body 31 formed in a cylindrical shape. The projecting plate 51 is sandwiched between a pair of half members 2a and 2b constituting the arm 2. Each of the half members 2a and 2b has a notch 52 on the surface facing the protruding plate 51. When the half members 2a and 2b abut each other, a groove opened at the lower surface and both side surfaces of the arm 2 at the notch 52. Is formed. The projecting plate 51 is inserted into this groove. Through holes 52a are formed in each of the half members 2a and 2b so as to correspond to the through holes 51a formed near the center of the protruding plate 51. A shaft screw 53 is inserted into the through holes 51a and 52a, and the shaft screw 53 passes through the two half members 2a, the protruding plate 51, and the half member 2b, and then around the through hole 52a on the outer surface of the half member 2b. It is screwed into a nut 54 fitted in the formed recess 52b. In addition, a knob nut 55 whose peripheral portion is in contact with the outer surface of the half member 2b is screwed into the distal end portion of the shaft screw 53.
[0017]
In the joint 5 having the above configuration, the nut 54 is tightened so that the shaft screw 53 is not loosened, and if the screwing amount of the thumb nut 55 with respect to the shaft screw 53 is adjusted, the head of the shaft screw 53 and the thumb nut 55 can be connected. By adjusting the distance, the contact pressure between the half members 2a and 2b and the protruding plate 51 can be adjusted, and as a result, the frictional force between the protruding plate 51 and the arm 2 is adjusted. . As a result, if the knob nut 55 is loosened, the lamp 3 can be easily rotated with respect to the arm 2, and if the knob nut 55 is tightened, the lamp 3 is not easily rotated with respect to the arm 2. It can be fixed.
[0018]
On the inner peripheral surface of the notch 52, there is exposed a contact 56 having a spring force that is continuous with the lower end portion of the electric circuit board 7 that is continuous with the contacts 47 and 48 and has a direction of moving away from the inner peripheral surface of the notch 52, Each of the contacts 56 resiliently contacts an annular contact 57 formed around the through hole 51a on both side surfaces of the protruding plate 51. Since the contact 57 is annular, the contact 56 comes into contact with the arm 2 at any position in the rotation range of the lamp 3.
[0019]
The contact 57 is formed integrally with the electric circuit board 8 by a conductive metal plate. The electric circuit board 8 electrically connects the contact 57 to the lamp socket 32 provided in the lamp body 31. The lamp socket 32 is formed integrally with the lamp body 31. The lamp socket 32 holds a lamp having a screw-type base such as an incandescent lamp. Further, a cover plate 33 is coupled to a surface of the lamp body 31 opposite to the opening side of the lamp socket 32. A pair of projections 33a are formed on the cover plate 33 on both sides of the projection plate 51 so as to fit into the grooves 31a formed in the lamp body 31, respectively. The protruding plate 51 is also extended inside the lamp body 31 and separates the two electric circuit boards 8 so that the two electric circuit boards 8 do not come into contact with each other. Thus, the electric circuit board 8 is fixed without rattling.
[0020]
According to the above configuration, two joints 4 and 5 are provided so that the lamp 3 can be oriented in an arbitrary direction with respect to the construction surface 6, and the contacts 45 to 48 and 56 are provided at the joints 4 and 5. , 57 are slidably contacted with each other in the movable range between the base 1 and the arm 2 and between the arm 2 and the lamp 3, and the members connected by the joints 4 and 5 are rotated indefinitely. Can be. Here, in the illustrated example, the projecting plate 51 projecting from the lamp body 31 is inserted into the groove formed at the lower end of the arm 2, so that the rotation range of the lamp 3 with respect to the arm 2 is limited. However, since this range is unnecessary, the rotation range is limited. If necessary, the same configuration as the first joint 4 can be adopted so that the rotation can be performed without limitation. It is.
[0021]
Further, as described above, the electric path to the lamp socket 32 is formed by using the electric circuit plates 7 and 8 made of a conductive metal plate, and the electric circuit plates 7 and 8 are provided in the base 1, the arm 2 and the lamp 3. Since the wire 8 is housed and is not exposed to the outside, it can be formed to have an excellent appearance as compared with the case where the wire exposed to the outside is used.
In the above embodiment, the base 1 is fixed to the construction surface 6, but the base 1 may be slidably attached to the wiring duct fixed to the construction surface 6. In this case, an attachment portion to be fitted to the wiring duct may be provided at the upper end portion of the base 1, and a current collector sliding in contact with an electric path provided along the longitudinal direction in the wiring duct may be provided. .
[0022]
【The invention's effect】
According to the first aspect of the present invention, a contact made of a conductive metal plate is fixed to each of a pair of rotating members forming a joint, and the contacts provided on both of the rotating members cover the entire rotating range of the rotating member. The sliding contact with each other over the circumference enables the two rotating members of the joint to rotate indefinitely. That is, as compared with the conventional configuration using an electric wire for the electric path to the lamp, there is no need to provide a stopper to prevent the disconnection of the electric wire, thereby restricting the rotation range, and the direction of the lamp can be easily adjusted. There is an advantage that.
[0023]
According to a second aspect of the present invention, the first contact provided on one of the rotating members is arranged coaxially about the center of rotation, and the second contact provided on the other rotating member is provided on the first rotating member. By making elastic contact with the contacts, the two contacts are brought into sliding contact over the entire circumference of the rotation range of the rotating member, and an electric path formed between the base, the arm and the lamp is connected to the base. Since it is built in the arm and the lamp, the electric circuit is not exposed to the outside, and it can be finished with an excellent appearance. There is no need to provide a member, which has the advantage of reducing the number of parts.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a first joint used in an embodiment.
FIG. 2 is an external perspective view showing an embodiment.
FIG. 3 is a perspective view showing a holding base used in the embodiment.
FIG. 4 is a perspective view showing a contact of a first joint used in the embodiment.
FIG. 5 is a perspective view showing a contact of a first joint used in the embodiment.
FIG. 6 is an exploded perspective view showing a second joint and a lamp used in the embodiment.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 base 2 arm 3 lamp 4 first joint 5 second joint 6 construction surface 7 electric circuit board 8 electric circuit board 45 contact 45 b contact ring 46 contact 45 c contact piece 47 contact 48 contact 56 contact 57 contact

Claims (2)

A base attached to the building surface, a lamp for holding the lamp, an arm interposed between the base and the lamp, a first joint connecting the base and the arm, and an arm and the lamp. A first joint and a second joint, wherein one of the first joint and the second joint is capable of rotating both members to be connected to each other in a plane substantially parallel to the construction surface, and the other is a member to be connected to the two joints. The member is rotatable in a plane substantially orthogonal to the construction surface, and the first joint and the second joint are respectively fixed to a pair of rotating members rotatably coupled to each other and to each rotating member. A pair of contacts made of a conductive metal plate that are in sliding contact with each other over the entire circumference of the rotation range of the rotation member, and an electric path passing through the base, the arm, and the lamp passes through the contact of each joint. At least one of the joints is rotating. A cylindrical body having an inner cylinder and an outer cylinder formed coaxially about the center, and two pairs of contacts, each pair of contacts being coaxially arranged about the center of rotation, and a pair of contacts. A spotlight , wherein each sliding contact portion of the contact is located across the inner cylinder of the cylinder . A plurality of first contacts are arranged coaxially about the center of rotation on one of the rotating members constituting each joint, and the other rotating member is in contact with each of the first contacts. A plurality of second contacts are provided, and an electric path formed between the base, the arm, and the lamp is built in the base, the arm, and the lamp. The spotlight according to 1.

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