JP2014032870A - Plug and luminaire and illumination system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug capable of suppressing an arc discharge occurring between the plug blade and a duct conductor when the plug is attached or removed, thereby making it possible to prevent overheating and other trouble, and a luminaire and illumination system using the plug.SOLUTION: Provided is a plug 1 for supplying the power received from a conductor 22 of a duct 2 to a load, wherein a plug blade 13a is inserted into the duct 2 via an opening 21d and touches the conductor 22 as it moves rotationally. Further in the plug 1, a switch unit 5 establishes and breaks continuity of a power supply path via the plug blade 13a to the load, and an option unit 14 is incapable of changing over from a cut off position to a conducting position because it interferes with the duct 2 until the plug blade 13a inserted into the duct 2 reaches a prescribed attachment complete position after it started moving rotationally, and is capable of changing over from the cut off position to the conducting position when the plug blade 13a is located at the attachment complete position.

Description

  The present invention relates to a plug attached to a duct, a lighting fixture using the plug, and a lighting system.

  Conventionally, as shown in FIG. 17, a power supply duct system is known in which a plug 100 is attached to a duct 200 and power is supplied from the duct 200 to the load via the plug 100 (see, for example, Patent Documents 1 and 2). A lamp 300 is attached to the plug 100 by an arm 400 to constitute a spotlight.

  The lamp 300 includes a shade 302 in which an annular front frame 301 is disposed at one end, and a case 303 disposed on the opposite side of the front frame 301 with the shade 302 interposed therebetween. A light source (not shown) such as an LED element is accommodated. A lighting device (not shown) is accommodated in the case 303.

  The arm 400 includes a pair of holding pieces 401 that sandwich the lamp 300 and an arm rotation shaft 402 that couples the pair of holding pieces 401 together. The lamp 300 is rotatably supported on the arm 400 by shaft screws attached to a pair of holding pieces 401, for example.

  The plug 100 includes a hollow cylindrical plug body 101. One end surface of the plug body 101 is attached to the arm rotation shaft 402 of the arm 400 so as to be rotatable and detachable.

  As shown in FIG. 18, a plug attachment portion 102 is provided on the other end surface of the plug body 101, and the plug attachment portion 102 is attached to the duct 200.

  The plug mounting portion 102 has a flat mounting plate 102b protruding from both side surfaces of a rectangular columnar column body portion 102a. That is, the pair of mounting plates 102b protrude in opposite directions.

  Further, the plug attachment portion 102 accommodates a pair of conductor plates 103 made of a conductor. A plug blade 103 a is provided at each end of the conductor plate 103. The pair of plug blades 103a are exposed from a pair of openings 102c provided on the front end face of the column body portion 102a, and each of the plug blades 103a extends in the same direction as the protruding direction of the mounting plate 102b, It protrudes from both side surfaces of 102a. That is, the pair of plug blades 103a protrude in opposite directions. The plug blade 103a is electrically connected to the lamp 300 via a power supply path including an electric circuit including a conductor plate 103 accommodated in the plug body 101, an electric wire, and the like.

  As shown in FIG. 18, the duct 200 forms an opening 201 d in the longitudinal direction of the long hollow case 201, and holds a conductor 202 along the longitudinal direction inside the case 201. FIG. 18 shows a cross section of FIG. 17 taken along a plane H100.

  The case 201 is formed in an elongated hollow shape having a substantially rectangular cross section, and the rear wall portion 201a is attached to a structural surface such as a ceiling surface or a wall surface. Side wall portions 201b extend substantially vertically from both side edges (that is, longitudinal edges) of the rear wall portion 201a, and a pair of front walls extend in a direction facing each other from the edge edges of the both side wall portions 201b. Wall part 201c is extended. An opening 201d along the longitudinal direction of the case 201 is formed between the pair of front wall portions 201c.

  In addition, insertion grooves 201e and 201f are formed along the longitudinal direction of the case 201 on each inner surface of the both side walls 201b. Further, a long conductor 202 is attached to the bottom surface of the insertion groove 201f.

  The plug mounting portion 102 of the plug 100 can be inserted into the opening 201 d of the duct 200 with the protruding direction of the mounting plate 102 b (the protruding direction of the plug blade 103 a) aligned with the longitudinal direction of the duct 200. The plug attachment portion 102 inserted into the opening 201d slides while the attachment plate 102b is sandwiched between the insertion grooves 201e when the plug 100 rotates. Then, when the plug mounting portion 102 rotates approximately 90 degrees, the plug mounting portion 102 is placed on the surface of the duct 200 on the front wall portion 201c side in a state in which the protruding direction of the mounting plate 102b matches the short direction of the duct 200. It is attached.

  At this time, when the plug mounting portion 102 inserted into the opening 201d rotates, the plug blade 103a also slides while being sandwiched in the insertion groove 201f from a state in which the protruding direction coincides with the longitudinal direction of the duct 200. To do. When the plug mounting portion 102 rotates approximately 90 degrees, the tip of the plug blade 103 a is in contact with the conductor 202, and the conductor plate 103 can receive DC power from the conductor 200. Thus, the plug 100 supplies DC power to the lamp 300 through the power supply path including the conductor plate 103.

Japanese Patent Laid-Open No. 2-142005 JP 2003-333727 A

  When the plug attachment portion 102 inserted into the opening 201d is rotated 90 degrees, the attachment completion position (the tip surface of the plug blade 103a is sufficiently in contact with the surface of the conductor 202 to suppress arc discharge). To the point of contact by area).

  However, as shown in FIG. 18, a halfway contact state in which the distal end surface of the plug blade 103 a is not sufficiently in contact with the surface of the conductor 202 occurs until the plug mounting portion 102 rotates 90 degrees. In this state, when power supply to the lamp 300 is started, arc discharge may occur between the plug blade 103a and the conductor 202, which may cause problems such as overheating.

  The present invention has been made in view of the above-described reasons, and its purpose is to suppress arc discharge generated between the plug blade of the plug and the conductor of the duct when the plug is attached and detached, thereby preventing occurrence of problems such as overheating. An object of the present invention is to provide a plug that can be prevented, a lighting apparatus using the plug, and a lighting system.

  The plug of the present invention has an opening in the longitudinal direction on one surface of a long hollow case, and is attached to the one surface side of a duct that holds the conductor along the longitudinal direction inside the case. A plug for supplying received power to a load, which is inserted into the case through the opening in a predetermined direction and rotated to turn the plug blade in contact with the conductor, and through the plug blade An opening / closing unit that conducts / cuts off the power supply path to the load, a conduction position that conducts the power supply path by the opening / closing unit, and an operation unit that displaces between a blocking position that shuts off the power supply path by the opening / closing unit. The operation unit is configured to switch from the blocking position to the conduction position from the time when the plug blade inserted into the case starts to rotate until reaching a predetermined mounting completion position. The duck It is impossible by interfering with, if the plug pins are in said fully applied position, characterized in that the said shut-off position can be switched to the conducting position.

  In this invention, the operation part is configured to be movable in the normal direction of the one surface of the case, and reaches the attachment completion position after the plug blade inserted into the case starts to rotate. Until the end face of the operation part switched to the blocking position is located opposite to one surface of the duct, and the plug blade is in the attachment completion position, the operation part switched to the conduction position is It is preferable to fit in the opening of the case.

  In this invention, it is preferable that the operation portion also serves as a positioning portion that fixes the plug blade at the attachment completion position.

  In this invention, the operation unit is configured to be displaceable in a rotation direction or a normal direction of the one surface of the case, and the attachment after the plug blade inserted into the case starts to rotate. Before reaching the completion position, when the end face of the operation unit switched to the blocking position is located opposite to one surface of the duct and the plug blade is in the attachment completion position, the operation section is switched to the conduction position. It is preferable that at least a part of the operation unit is positioned to face the longitudinal side surface of the duct.

  In this invention, it is preferable to provide a positioning portion that fits into the opening of the case when the plug blade is in the attachment completion position.

  In this invention, it is preferable that the opening / closing part moves the plug blade through an elastic body in conjunction with the displacement of the operation unit, thereby bringing the plug blade into contact with and separating from the conductor.

  In this invention, the opening / closing portion has a rotating plate that rotates in conjunction with the displacement of the operating portion, and has elasticity, and is bent when the rotating plate comes into contact with the plug blade so as to It is preferable to include a terminal plate that conducts and blocks the supply path.

  The luminaire of the present invention is a book that forms an opening in the longitudinal direction on one surface of a long hollow case, is attached to a duct that holds a conductor along the longitudinal direction inside the case, and receives power from the conductor. It is characterized by comprising the plug of the invention and a lamp supplied with electric power from the plug.

  The illumination system of the present invention includes a duct that forms an opening in a longitudinal direction on one surface of a long hollow case and holds a conductor along the longitudinal direction inside the case, and one or more illuminations of the present invention. And an instrument.

  As described above, according to the present invention, since the switching from the blocking position of the operation portion to the conducting position is impossible until the plug blade reaches a predetermined installation completion position, the plug blade and duct of the plug are attached to and detached from the plug. This has the effect of suppressing the arc discharge generated between the conductors and preventing the occurrence of problems such as overheating.

(A) (b) It is a perspective view which shows the structure of the plug of Embodiment 1. FIG. (A) (b) It is a perspective view which shows the external appearance of a plug same as the above. It is a perspective view which shows the structure of a conductor board same as the above. (A) (b) It is a perspective view which shows the structure of the opening / closing part same as the above. It is a perspective view which shows a part of illumination system same as the above. It is a perspective view which shows the concept of the opening / closing part of Embodiment 2. FIG. (A) (b) It is a perspective view which shows the external appearance of a plug same as the above. (A) (b) It is a fracture | rupture figure which shows a part of inside of a plug same as the above. It is sectional drawing which shows the structure of a duct same as the above. It is a perspective view which shows the outline of the opening / closing part of Embodiment 3. FIG. It is a perspective view which shows the outline of an opening / closing part same as the above. It is the partially broken top view which shows the structure at the time of attachment / detachment of a plug and a duct same as the above. It is the partially broken top view which shows the structure at the time of attachment / detachment of a plug and a duct same as the above. It is the partially broken top view which shows the structure at the time of attachment / detachment of a plug and a duct same as the above. It is the partially broken top view which shows the structure at the time of attachment / detachment of a plug and a duct same as the above. It is the schematic which shows the structure of the lighting fixture of Embodiment 4, and a lighting system. It is a perspective view which shows the structure of the conventional illumination system. It is the partially broken perspective view which shows a part of conventional lighting system.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 5 schematically shows an illumination system in which the plug 1 of this embodiment is attached to the duct 2 and DC power is supplied from the duct 2 to the lamp 3 via the plug 1.

  A lamp 3 is attached to the plug 1 by an arm 4 to constitute a spotlight (lighting device of the present invention). However, the load supplied with DC power from the plug 1 is not limited to the lamp 3.

  The lamp 3 includes a shade 32 in which an annular front frame 31 is disposed at one end, and a case 33 disposed on the opposite side of the front frame 31 with the shade 32 interposed therebetween. A light source (not shown) such as an LED element is accommodated. A lighting device (not shown) is accommodated in the case 33.

  The arm 4 includes a pair of holding pieces 41 that sandwich the lamp 3 and an arm rotation shaft 42 that couples the pair of holding pieces 41 to each other. The lamp 3 is rotatably supported on the arm 4 by shaft screws attached to a pair of holding pieces 41, for example.

  The structure of the plug 1 is shown in FIGS. In the following description, the vertical direction is defined in FIGS. 2 (a) and 2 (b).

  The plug 1 includes a hollow cylindrical plug body 11. The lower surface of the plug body 11 is attached to the arm rotation shaft 42 of the arm 4 so as to be rotatable and detachable. A plug attachment portion 12 is provided on the upper surface of the plug body 11, and the plug attachment portion 12 is attached to the duct 2.

  The plug mounting portion 12 has a flat mounting plate 12b projecting from both side surfaces of the rectangular columnar column body portion 12a. That is, the pair of mounting plates 12b protrude in opposite directions.

  Further, the plug attachment portion 12 accommodates a pair of conductor plates 13 made of a conductor. As shown in FIG. 3, the conductor plate 13 includes a connecting piece 13b, a plug blade 13a bent at one end side of the connecting piece 13b at a substantially right angle, and a substantially U-shape provided at the other end side of the connecting piece 13b. The fixed piece 13c.

  The plug blade 13a is exposed from both side surfaces of the column body portion 12a, and each of the plug blades 13a extends in the same direction as the protruding direction of the mounting plate 12b and protrudes from both side surfaces of the column body portion 12a. That is, the pair of plug blades 13a protrude in opposite directions. And this conductor plate 13 is electrically connected to the lamp 3 through the electric power supply path comprised with the electric circuit, electric wire, etc. which are not shown in figure.

  The fixed piece 13c is formed in a substantially U-shape, and is composed of opposed pieces 13d and 13e facing each other, and a central piece 13f that connects the opposed pieces 13d and 13e to each other, and the central piece 13f is the connected piece 13b. It is continuous in one. Further, the central piece 13f has an opening 13g formed substantially at the center, and an annular protrusion 13h is provided on the periphery of the opening 13g on the side sandwiched between the opposing pieces 13d and 13e.

  A groove 11a having an open upper surface is formed on one side of the plug body 11 in a direction perpendicular to the protruding direction of the mounting plate 12b, so that the plate-like operation unit 14 can be displaced in the vertical direction. It is attached to the groove 11a. The surface of the operation unit 14 is configured by a curved surface so as to be continuous with the surface of the columnar plug body 11, and a plurality of ridges 14a formed along the circumferential direction are formed. In addition, the up-down direction in which the operation part 14 is displaced is a normal direction of the lower surface of the case 21 described later of the duct 2.

  The operation unit 14 is connected to the opening / closing unit 5 shown in FIGS. 4A and 4B in the plug main body 11, and the plug blade 13 a is linked to the vertical displacement of the operation unit 14 to form a columnar body. Go in and out of the side of the part 12a.

  The opening / closing part 5 includes an operation piece 51, a pair of plug blade holding pieces 52, and a pair of springs 53 (elastic body) as main elements.

  The operation piece 51 is formed in a trapezoidal cross-sectional plate shape in which slopes 51a that widen from the upper surface toward the lower surface are formed at both end portions. The operation piece 51 is attached to the back surface of the operation unit 14 and is displaced in the vertical direction in conjunction with the operation unit 14.

  The stopper blade holding piece 52 is formed in a plate shape that is long in the vertical direction, and the lower surface of the stopper blade holding piece 52 is formed with an inclined surface 52a facing the inclined surface 51a, and is placed on the inclined surface 51a of the operation piece 51. The In other words, the pair of blade holding pieces 52 are provided to face both sides of the operation piece 51.

  A rectangular protruding piece 52b protrudes from the outer surface of each blade holding piece 52, and the fixed piece 13c of the conductor plate 13 is fixed to the protruding piece 52b. The opposing pieces 13d and 13e of the fixed piece 13c sandwich the protruding piece 52b from above and below, and the protruding portion 13h is fixed by caulking or the like through a circular opening provided in the protruding piece 52b.

  Furthermore, one end of the spring 53 is fixed to the outer surface of the plug blade holding piece 52, and the other end of the spring 53 is an inner peripheral surface of the plug main body 11 (or a structure (not shown) provided on the inner peripheral surface of the plug main body 11). Body).

  Hereinafter, the operation of the plug 1 will be described with reference to FIGS. 2 (a) and 2 (b) and FIGS. 4 (a) and 4 (b).

  First, as shown in FIGS. 2A and 4A, when the operation unit 14 is displaced upward, the slope 51a of the operation piece 51 is also displaced upward, and the slope 52a of the plug blade holding piece 52 is displaced. Slides on the inclined surface 51 a, and the pair of blade holding pieces 52 move away from each other while compressing the spring 53 against the spring force of the spring 53. Accordingly, the pair of plug blades 13a also move away from each other, and the plug blades 13a protrude from both side surfaces of the columnar portion 12a. At this time, the operating portion 14 is held at the upper limit position by a holding means (not shown) (for example, a locking structure), and the spring 53 maintains a compressed state, and the fitting portion 14b formed at the upper end of the operating portion 14 Projecting upward from the open end of the groove 11a. Here, the state in which the operation unit 14 is displaced upward as shown in FIG. 2A is a conduction position where the power supply path to the lamp 3 is conducted by the opening / closing unit 5.

  Next, as shown in FIGS. 2B and 4B, when the operation unit 14 is displaced downward, the slope 51 a of the operation piece 51 is also displaced downward, and the slope of the plug blade holding piece 52 is moved. 52a slides on the inclined surface 51a, and the pair of blade holding pieces 52 move in a direction approaching each other by the spring force of the compressed spring 53. Therefore, the pair of plug blades 13a also move in a direction approaching each other, and the plug blades 13a are accommodated in the column body portion 12a through the openings 12c provided on both side surfaces of the column body portion 12a. At this time, the fitting portion 14b formed at the upper end of the operation portion 14 is accommodated below the open end of the groove portion 11a, and the spring 53 returns to the equilibrium position. Here, the state in which the operation unit 14 is displaced downward as shown in FIG. 2B is a blocking position where the power supply path to the lamp 3 is blocked by the opening / closing unit 5.

  An operation when the plug 1 is attached to and detached from the duct 2 will be described below with reference to FIGS.

  First, the duct 2 forms an opening 21d in the longitudinal direction of the long hollow case 21 (see FIG. 5), and holds a pair of conductors 22 along the longitudinal direction inside the case 21. For example, a DC voltage of 24 V is applied between the pair of conductors 22.

  The case 21 is formed in an elongated hollow shape having a substantially rectangular cross section, and the rear wall portion 21a is attached to a structural surface such as a ceiling surface or a wall surface. Side wall portions 21b extend substantially vertically from both side edges (that is, longitudinal edges) of the rear wall portion 21a, and a pair of front walls extend in a direction facing each other from the edge edges of the both side wall portions 21b. Wall part 21c is extended. An opening 21d along the longitudinal direction of the case 21 is formed between the pair of front wall portions 21c.

  A protruding wall 21e having a substantially H-shaped cross section stands on each inner surface of the side wall portions 21b. An insertion groove 21f is formed along the longitudinal direction of the case 21 between the protruding wall 21e and the front wall portion 21c. Further, an insertion groove 21g is formed at the tip of the protruding wall 21e along the longitudinal direction of the case 21, and a long conductor 22 is attached to the bottom surface of the insertion groove 21g.

  First, when the plug 1 is attached to the duct 2, the plug attachment portion 12 of the plug 1 opens the duct 2 in a state where the protruding direction of the mounting plate 12 b (the protruding direction of the plug blade 13 a) is aligned with the longitudinal direction of the duct 2. It is inserted into the part 21d. At this time, the upper end of the fitting portion 14b of the operation portion 14 contacts (interferences) with the outer surface of the front wall portion 21c of the duct 2, and the operation portion 14 is displaced downward. Therefore, the plug blade 13a is accommodated in the columnar portion 12a. Then, the plug mounting portion 12 inserted into the opening 21d slides while the mounting plate 12b is sandwiched between the insertion grooves 21f as the plug 1 rotates in one direction.

  FIG. 1A shows the state of the rotating plug 1 and duct 2, and while the plug 1 is rotating in one direction, the upper end of the fitting portion 14 b of the operation portion 14 is the duct. 2 is in contact (interference) with the outer surface of the front wall 21c. Therefore, since the operation part 14 is displaced downward and maintains the state of sliding on the outer surface of the front wall part 21c, the plug blade 13a is accommodated in the column body part 12a, and the plug blade 13a is There is no contact with the conductor 22. That is, since the power supply to the lamp 3 is not started while the plug 1 is rotated in one direction, it is possible to suppress the occurrence of arc discharge between the plug blade 13a and the conductor 22. it can.

  Then, as shown in FIG. 1B, when the plug mounting portion 12 rotates approximately 90 degrees in one direction, a notch portion 11 b provided on a part of the outer periphery of the upper surface of the plug body 11 is formed on the lower surface of the case 21. Locks to the convex portion 21h provided at one side edge. At this time, the plug attachment portion 12 is in a state in which the protruding direction of the attachment plate 12b coincides with the short direction of the duct 2, and the fitting portion 14b of the operation portion 14 is positioned facing the opening portion 21d of the duct 2. . And when a user puts a finger on the protrusion 14a of the operation part 14 and pushes up the operation part 14, the fitting part 14b of the operation part 14 is displaced upward, and the opening part 21d of the duct 2 is carried out. Fit into. When the operation portion 14 is displaced upward, the plug blade 13 a protrudes from both side surfaces of the column body portion 12 a, and the tip of the plug blade 13 a contacts the conductor 22.

  That is, a halfway contact state in which the distal end surface of the plug blade 13a is not sufficiently in contact with the surface of the conductor 22 does not occur until the plug mounting portion 12 rotates 90 degrees in one direction. Further, at the mounting completion position where the plug mounting portion 12 is rotated 90 degrees in one direction, the distal end surface of the plug blade 13a is sufficiently in contact with the surface of the conductor 22 when the operation portion 14 is displaced upward. The occurrence of discharge is suppressed. Therefore, when attaching the plug 1 to the duct 2, arc discharge generated between the plug blade 13a and the conductor 22 can be suppressed, and problems such as overheating can be prevented.

  The attachment completion position is a rotation position at which the distal end surface of the plug blade 13a can come into contact with the surface of the conductor 22 with a sufficient contact area capable of suppressing arc discharge.

  Further, when the fitting portion 14b of the operation portion 14 is fitted into the opening 21d of the duct 2 at the attachment completion position, the operation portion 14 sets the rotation position of the plug 1 (the plug blade 13a) to the attachment completion position. It is also used as a positioning part to be fixed to. Therefore, the structure can be simplified.

  Next, when the plug 1 is removed from the duct 2, the user places a finger on the protrusion 14 a of the operation unit 14 and pushes down the operation unit 14, whereby the fitting unit 14 b of the operation unit 14 is moved downward. Displacement and the fitting state with the opening part 21d of the duct 2 are cancelled | released. When the operation portion 14 is displaced downward, the plug blade 13 a is accommodated in the column body portion 12 a, and the tip of the plug blade 13 a is separated from the conductor 22. At this time, the plug blade 13a moves quickly due to the spring force of the compressed spring 53, so that even if arc discharge occurs, it is quickly cut off.

  The plug mounting portion 12 slides while the mounting plate 12b is sandwiched between the insertion grooves 21f as the plug 1 rotates in the other direction.

  While the plug 1 is rotating in the other direction, the upper end of the fitting portion 14 b of the operation portion 14 is in contact (interference) with the outer surface of the front wall portion 21 c of the duct 2. Therefore, the operation part 14 is displaced downward, and the upper end of the fitting part 14b maintains a state of sliding on the outer surface of the front wall part 21c of the duct 2. Therefore, the plug blade 13 a is accommodated in the column body portion 12 a, and the plug blade 13 a does not contact the conductor 22. That is, since the power supply to the lamp 3 is not started while the plug 1 is rotated in the other direction, it is possible to suppress the occurrence of arc discharge between the plug blade 13a and the conductor 22. it can.

  When the plug mounting portion 12 is rotated approximately 90 degrees in the other direction, the protruding direction of the mounting plate 12b (the protruding direction of the plug blade 13a) coincides with the longitudinal direction of the duct 2, and the plug mounting portion 12 is opened to the opening of the duct 2. It can be removed from the part 21d.

  That is, a halfway contact state in which the tip surface of the plug blade 13a is not sufficiently in contact with the surface of the conductor 22 until the plug mounting portion 12 is rotated 90 degrees in the other direction does not occur. Therefore, when removing the plug 1 from the duct 2, arc discharge generated between the plug blade 13a and the conductor 22 can be suppressed, and problems such as overheating can be prevented.

  In particular, in the DC power supply, unlike the AC power supply, the arc discharge tends to continue. However, in this embodiment, the blade 13a and the conductor 22 are used even during the DC power supply while the plug 1 is attached to and detached from the lighting duct 2. Arc discharge occurring between the two can be suppressed.

(Embodiment 2)
FIG. 6 shows the concept of the opening / closing part 6 of this embodiment, and FIGS. 7A and 7B show the appearance of the plug 1 of this embodiment. In addition, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, and description is abbreviate | omitted.

  First, in the plug body 11, the operating part 14 is connected to the pair of conductor plates 13, and the plug blade 13 a moves in the vertical direction in conjunction with the vertical displacement of the operating part 14 in the plug body 11. Consists of. In addition, the connection structure of the operation part 14 and a pair of conductor plates 13 is realizable using well-known techniques, such as a connection member by a resin molded product, and detailed description is abbreviate | omitted.

  Further, on the back surface of the operation portion 14, a spring accommodating portion 62 that opens the lower surface and accommodates the spring 61 is formed, the upper end of the spring 61 abuts the bottom surface of the spring accommodating portion 62, and the lower end of the spring 61 is It contacts a structure (not shown) provided in the plug body 11. And when the operation part 14 is located in an upper limit, the spring 61 exists in an equilibrium position, and when the operation part 14 is displaced below, the spring 61 is comprised so that it may compress.

  Furthermore, as shown to Fig.7 (a), the rectangular opening 12d is formed in each location where the plug blade 13a protrudes in the pillar part 12a of the plug attachment part 12. FIG. The vertical dimension of the opening 12d is formed such that the plug blade 13a can move in the vertical direction.

  When a downward force is applied to the operation unit 14 and the operation unit 14 is displaced downward, the operation unit 14 moves downward while compressing the spring 61 against the spring force of the spring 61. To do. At this time, the pair of conductor plates 13 connected to the operation unit 14 also move downward, and the plug blade 13a is positioned below the opening 12d. And the fitting part 14b formed in the upper end of the operation part 14 is settled below from the open end of the groove part 11a, and the spring 61 will be in a compression state. Here, the state in which the operation unit 14 is displaced downward as shown in FIG. 7A is a blocking position where the power supply path to the lamp 3 is blocked by the opening / closing unit 6.

  Next, when the downward force applied to the operation unit 14 is released, the operation unit 14 moves upward by the extension force of the spring 61 in the compressed state, as shown in FIG. 7B. At this time, the pair of conductor plates 13 connected to the operation unit 14 also moves upward, and the plug blade 13a is positioned above the opening 12d. And the fitting part 14b formed in the upper end of the operation part 14 protrudes upwards from the open end of the groove part 11a. Here, the state in which the operation unit 14 is displaced upward as shown in FIG. 7B is a conduction position where the power supply path to the lamp 3 is conducted by the opening / closing unit 6.

  The operation when the plug 1 is attached to and detached from the duct 2 will be described below with reference to FIGS. 7 (a) and 7 (b), FIGS. 8 (a) and 8 (b), and FIG.

  First, as shown in FIG. 9, projecting walls 21 i and 21 j are erected along the longitudinal direction of the duct 2 on each inner surface of the both side walls 21 b of the duct 2 of the present embodiment. An insertion groove 21k is formed along the longitudinal direction of the case 21 between the protruding wall 21i and the front wall portion 21c. Further, an insertion groove 21m is formed along the longitudinal direction of the case 21 between the protruding walls 21i and 21j. A long conductor 22 is buried in the upper surface of the insertion groove 21m (the lower surface of the protruding wall 21j) with its lower surface exposed.

  First, when the plug 1 is attached to the duct 2, the plug attachment portion 12 of the plug 1 opens the duct 2 in a state where the protruding direction of the mounting plate 12 b (the protruding direction of the plug blade 13 a) is aligned with the longitudinal direction of the duct 2. It is inserted into the part 21d. At this time, the upper end of the fitting portion 14b of the operation portion 14 contacts (interferences) with the outer surface of the front wall portion 21c of the duct 2, and the operation portion 14 is displaced downward. Therefore, as shown in FIG. 7A, the plug blade 13a moves downward in the opening 12d. Then, the plug mounting portion 12 inserted into the opening 21d slides while the mounting plate 12b is sandwiched between the insertion grooves 21k as the plug 1 rotates in one direction.

  While the plug 1 is rotating in one direction, the upper end of the fitting portion 14 b of the operation portion 14 is in contact (interference) with the outer surface of the front wall portion 21 c of the duct 2. Therefore, since the operation part 14 is displaced downward and maintains the state of sliding on the outer surface of the front wall part 21c, the plug blade 13a is positioned inside the insertion groove 21m while being positioned below the insertion groove 21m. Moving. At this time, as shown in FIG. 8A, the substantially hemispherical contact portion 13 i provided on the plug blade 13 a is separated from the conductor 22. That is, since the power supply to the lamp 3 is not started while the plug 1 is rotated in one direction, it is possible to suppress the occurrence of arc discharge between the plug blade 13a and the conductor 22. it can. 8A shows a state in which the operation unit 14 is displaced downward in a state where the plug 1 is rotated 90 degrees in one direction so that it can be easily compared with FIG. 8B described later. Yes.

  Then, when the plug mounting portion 12 rotates approximately 90 degrees in one direction, the notch portion 11 b of the plug body 11 is locked to the convex portion 21 h of the case 21. At this time, the plug attachment portion 12 is in a state in which the protruding direction of the attachment plate 12b coincides with the short direction of the duct 2, and the fitting portion 14b of the operation portion 14 is positioned facing the opening portion 21d of the duct 2. . Then, as shown in FIG. 7B, the operation unit 14 moves upward by the extension force of the spring 61 in the compressed state. At this time, as shown in FIG. 8B, the pair of conductor plates 13 connected to the operation portion 14 also moves upward, the plug blade 13a moves above the insertion groove 21m, and the contact portion 13i serves as the conductor 22. To touch.

  That is, a halfway contact state in which the plug blade 13a is not sufficiently in contact with the surface of the conductor 22 does not occur until the plug mounting portion 12 rotates 90 degrees in one direction. In addition, at the attachment completion position where the plug attachment portion 12 is rotated 90 degrees in one direction, the contact portion 13i of the plug blade 13a quickly and sufficiently contacts the surface of the conductor 22 due to the extension force of the spring 61. The occurrence of discharge is suppressed. Therefore, when attaching the plug 1 to the duct 2, arc discharge generated between the plug blade 13a and the conductor 22 can be suppressed, and problems such as overheating can be prevented.

  The attachment completion position is a rotation position at which the contact portion 13i of the plug blade 13a can sufficiently come into contact with the surface of the conductor 22.

  Further, at the attachment completion position, the fitting portion 14b of the operation portion 14 is displaced upward and fitted into the opening portion 21d of the duct 2, so that the operation portion 14 is connected to the plug 1 (the plug blade 13a). It also serves as a positioning part that fixes the rotation position to the attachment completion position. Therefore, the structure can be simplified.

  Next, when the plug 1 is removed from the duct 2, the user places a finger on the protrusion 14 a of the operation unit 14 and pushes down the operation unit 14, whereby the fitting unit 14 b of the operation unit 14 is moved downward. Displacement and the fitting state with the opening part 21d of the duct 2 are cancelled | released. Then, when the operation portion 14 is displaced downward, the plug blade 13a is also moved downward in the opening 12d, and the contact portion 13i is separated from the conductor 22.

  The plug mounting portion 12 slides while the mounting plate 12b is sandwiched between the insertion grooves 21k as the plug 1 rotates in the other direction.

  While the plug 1 is rotating in the other direction, the upper end of the fitting portion 14 b of the operation portion 14 is in contact (interference) with the outer surface of the front wall portion 21 c of the duct 2. Therefore, the operation part 14 is displaced downward, and the upper end of the fitting part 14b maintains a state of sliding on the outer surface of the front wall part 21c of the duct 2. Therefore, the plug blade 13a moves in the insertion groove 21m while being positioned below the insertion groove 21m. At this time, the substantially hemispherical contact portion 13 i provided on the plug blade 13 a is separated from the conductor 22. That is, since the power supply to the lamp 3 is not started while the plug 1 is rotated in the other direction, it is possible to suppress the occurrence of arc discharge between the plug blade 13a and the conductor 22. it can.

  When the plug mounting portion 12 is rotated approximately 90 degrees in the other direction, the protruding direction of the mounting plate 12b (the protruding direction of the plug blade 13a) coincides with the longitudinal direction of the duct 2, and the plug mounting portion 12 is opened to the opening of the duct 2. It can be removed from the part 21d.

  That is, after the operation unit 14 is moved downward, the halfway contact state in which the plug blade 13a is not sufficiently in contact with the surface of the conductor 22 until the plug mounting portion 12 is rotated 90 degrees in the other direction. It does not occur. Therefore, when removing the plug 1 from the duct 2, arc discharge generated between the plug blade 13a and the conductor 22 can be suppressed, and problems such as overheating can be prevented.

  In particular, in the DC power supply, unlike the AC power supply, the arc discharge tends to continue. However, in this embodiment, the blade 13a and the conductor 22 are used even during the DC power supply while the plug 1 is attached to and detached from the lighting duct 2. Arc discharge occurring between the two can be suppressed.

(Embodiment 3)
In the present embodiment, two operation units “operation unit 7” and “operation unit 14” are provided. And the operation part 7 is equivalent to the "operation part which displaces between the conduction | electrical_connection position which makes an electric power supply path conduct by an opening-and-closing part, and the interruption | blocking position which interrupts | blocks an electric power supply path by an opening / closing part" of this invention. Further, the operation unit 14 corresponds to a “positioning unit that fixes the plug blade at the attachment completion position” of the present invention.

  10 and 11 show an outline of the opening / closing unit 8 using the operation unit 7 of the present embodiment (corresponding to the operation unit of the present invention), and FIGS. 12 to 14 show one of the plugs 1 of the present embodiment. The structure which partly fractured is shown. In addition, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, and description is abbreviate | omitted.

  The operation unit 7 is connected to the opening / closing unit 8 in the plug body 11.

  First, the operation unit 7 is provided on the side surface of the plug body 11 so as to be rotatable at a position approximately 90 degrees apart from the operation unit 14 (corresponding to the positioning unit of the present invention). The operation portion 7 is formed in a substantially rectangular flat plate shape, and a substantially rectangular operation piece 7a operated by a user, and a bearing portion 7b formed biased to one side in the longitudinal direction of the substantially rectangular operation piece 7a. It consists of.

  The opening / closing part 8 includes a rotating shaft 81, a pair of rotating plates 82, and a pair of terminal plates 83 as main elements.

  The rotation shaft 81 has the axial direction as a parallel arrangement direction of the pair of conductor plates 13 (projection direction of the plug blade 13 a), and one end of the rotation shaft 81 is connected to the bearing portion 7 b of the operation unit 7. A pair of rotating plates 82 are attached to the rotating shaft 81 at substantially the same interval as the arrangement interval of the pair of conductor plates 13. The rotating plate 82 includes a shaft passing portion 82 a through which the rotating shaft 81 is inserted, and a plate-like blade portion 82 b provided integrally with the shaft passing portion 82 a and extending in the radial direction of the rotating shaft 81. . Then, when the operation unit 7 rotates about the rotation shaft 81, the rotation plate 82 also rotates about the rotation shaft 81. The blade portion 82b of the rotary plate 82 is attached along the longitudinal direction of the substantially rectangular operation piece 7a. The direction of the operation piece 7a and the direction of the blade part 82b are opposite to each other.

  The pair of terminal plates 83 are arranged in the axial direction of the rotating shaft 81, arranged below the pair of rotating plates 82, and face the central piece 13 f of the fixed piece 13 c provided on the conductor plate 13. The terminal plate 83 is formed of a conductive member having elasticity, and includes a rod-like bent portion 83a and a contact portion 83b obtained by bending one end of the bent portion 83a into an L shape. The other end of the bending portion 83 a is electrically connected to the lamp 3 and constitutes a part of the power supply path that reaches the lamp 3.

  And as shown in FIG. 10, when it exists in the position (blocking position) where the longitudinal direction of the operation piece 7a becomes a horizontal direction, the blade | wing part 82b has also faced the horizontal direction. At this time, the blade portion 82b is separated from the bent portion 83a of the terminal plate 83, and the contact portion 83b of the terminal plate 83 is not in contact with the central piece 13f of the fixed piece 13c. That is, the opening / closing unit 8 blocks the power supply path to the lamp 3.

  Next, as shown in FIG. 11, when the operation piece 7 a is rotated to a position where the longitudinal direction of the operation piece 7 a is upward (conduction position), the rotating plate 82 rotates and the blade portion 82 b faces downward, and the blade portion 82b abuts on the bending portion 83a of the terminal board 83. The bending portion 83a is bent toward the fixed piece 13c by the rotational force of the blade portion 82b, and the contact portion 83b of the terminal plate 83 is in contact with the central piece 13f of the fixed piece 13c. That is, the opening / closing part 8 makes the power supply path to the lamp 3 conductive.

  An operation when the plug 1 is attached to and detached from the duct 2 will be described below with reference to FIGS.

  First, as shown in FIG. 12, when the plug 1 is attached to the duct 2, the plug attaching portion 12 of the plug 1 matches the protruding direction of the mounting plate 12 b (the protruding direction of the plug blade 13 a) with the longitudinal direction of the duct 2. In the state, it is inserted into the opening 21d of the duct 2. At this time, the operation piece 7a is a blocking position where the longitudinal direction is the horizontal direction. Therefore, in the opening / closing part 8, the blade part 82b is separated from the bending part 83a of the terminal plate 83, and the contact part 83b of the terminal plate 83 is not in contact with the central piece 13f of the fixed piece 13c. That is, the opening / closing part 8 blocks the power supply path to the lamp 3 (see FIG. 10).

  Then, the plug mounting portion 12 inserted into the opening 21d slides while the mounting plate 12b is sandwiched between the insertion grooves 21f as the plug 1 rotates in one direction. At this time, the plug blade 13a also slides while being sandwiched in the insertion groove 21g from a state in which the protruding direction coincides with the longitudinal direction of the duct 2. A halfway contact state occurs in which the tip end surface of the plug blade 13a is not sufficiently in contact with the surface of the conductor 22 until the plug mounting portion 12 rotates approximately 90 degrees. Since the power supply path to is interrupted, no arc discharge occurs.

  In addition, while the plug 1 is rotating in one direction, even if the operation piece 7a is switched from the blocking position where the longitudinal direction is horizontal to the conduction position where the longitudinal direction is vertical, the operation piece 7a is It interferes with the outer surface of the front wall 21c of the duct 2. Therefore, since the rotation position of the operation piece 7a cannot be switched from the blocking position to the conduction position during the rotation, the power supply path to the lamp 3 is not conducted.

  Then, as shown in FIG. 13, when the plug mounting portion 12 rotates approximately 90 degrees in one direction, the cutout portion 11 b of the plug body 11 is locked to the convex portion 21 h of the case 21. At this time, the plug attachment portion 12 is in a state in which the protruding direction of the attachment plate 12b coincides with the short direction of the duct 2, and the fitting portion 14b of the operation portion 14 is positioned facing the opening portion 21d of the duct 2. . And when a user puts a finger on the protrusion 14a of the operation part 14 and pushes up the operation part 14, the fitting part 14b of the operation part 14 is displaced upward, and the opening part 21d of the duct 2 is carried out. Fit into. When the fitting portion 14b is fitted into the opening 21d of the duct 2, the plug 1 (the plug blade 13a) is fixed at the attachment completion position. That is, the operation unit 14 constitutes a positioning unit of the present invention.

  At the attachment completion position, the protruding direction of the plug blade 13a also coincides with the short direction of the duct 2, and the distal end surface of the plug blade 13a sufficiently contacts the surface of the conductor 22. And as shown in FIG. 14, when the user switches the rotation position of the operation piece 7a from the interruption position to the conduction position, the power supply path to the lamp 3 is conducted by the opening / closing part 8 (see FIG. 11). At this time, since the front end surface of the plug blade 13a is sufficiently in contact with the surface of the conductor 22, arc discharge generated between the plug blade 13a and the conductor 22 can be suppressed, and problems such as overheating can be prevented. it can.

  The attachment completion position is a rotation position at which the distal end surface of the plug blade 13a can sufficiently come into contact with the surface of the conductor 22.

  Next, when the plug 1 is removed from the duct 2, first, the user switches the rotation position of the operation piece 7 a from the conduction position to the cutoff position, whereby the power supply path to the lamp 3 is blocked by the opening / closing unit 8. . At this time, the contact portion 83b is quickly separated from the central piece 13f of the fixed piece 13c by the spring force of the bending portion 83a, so that even if arc discharge occurs, it is quickly cut off.

  Further, when the user puts a finger on the protrusion 14a of the operation unit 14 and pushes the operation unit 14 downward, the fitting unit 14b of the operation unit 14 is displaced downward, and the opening 21d of the duct 2 and The fitting state is released.

  The plug mounting portion 12 slides while the mounting plate 12b is sandwiched between the insertion grooves 21f as the plug 1 rotates in the other direction. While the plug 1 is rotating in the other direction, the operation piece 7a interferes with the outer surface of the front wall portion 21c of the duct 2 even if the operation piece 7a is switched from the blocking position to the conduction position. Therefore, since the rotation position of the operation piece 7a cannot be switched from the blocking position to the conduction position during the rotation, the power supply path to the lamp 3 is not conducted.

  When the plug mounting portion 12 is rotated approximately 90 degrees in the other direction, the protruding direction of the mounting plate 12b (the protruding direction of the plug blade 13a) coincides with the longitudinal direction of the duct 2, and the plug mounting portion 12 is opened to the opening of the duct 2. It can be removed from the part 21d.

  That is, the power supply path to the lamp 3 does not conduct until the plug mounting portion 12 rotates 90 degrees in the other direction. Therefore, when removing the plug 1 from the duct 2, arc discharge generated between the plug blade 13a and the conductor 22 can be suppressed, and problems such as overheating can be prevented.

  In particular, in the DC power supply, unlike the AC power supply, the arc discharge tends to continue. However, in this embodiment, the blade 13a and the conductor 22 are used even during the DC power supply while the plug 1 is attached to and detached from the lighting duct 2. Arc discharge occurring between the two can be suppressed.

  Further, when the plug 1 is attached to the duct 2 in a state where the operation portion 7 is in the conduction position, the operation piece 7a of the operation portion 7 is fitted into the opening 21d of the duct 2 as shown in FIG. Therefore, the plug 1 cannot be rotated, and the power supply path to the lamp 3 is not conducted.

(Embodiment 4)
FIG. 16 shows an illumination system using the plug 1 and the duct 2 according to any one of the first to third embodiments. Moreover, the lighting fixture K is comprised by attaching the lamp 3 to the plug 1 via the arm 4. In addition, the same code | symbol is attached | subjected to the structure similar to any of Embodiment 1 thru | or 3, and description is abbreviate | omitted.

  The duct 2 is attached to the ceiling surface, and the DC power supply device PS is disposed on the back of the ceiling. The DC voltage output by the DC power supply device PS is input to the feed-in portion FD provided at the end of the duct 2 via the wiring W. The DC voltage input to the feed-in part FD is applied to the conductor 22 of the duct 2.

  One or more lighting fixtures K (three in FIG. 16) are attached to the duct 2, and each of the lighting fixtures K is supplied with a DC voltage from the duct 2 and lights up.

  Also in the lighting fixture K and lighting system of this embodiment, the arc discharge generated between the plug blade of the plug and the conductor of the duct when the plug is attached and detached can be suppressed, and the occurrence of problems such as overheating can be prevented.

DESCRIPTION OF SYMBOLS 1 Plug 2 Duct 5 Opening / closing part 13a Plug blade 14 Operation part 21 Case 21d Opening part 22 Conductor

Claims (9)

An opening is formed in a longitudinal direction on one surface of a long hollow case, and is attached to the one surface side of a duct that holds a conductor along the longitudinal direction inside the case, and the power received from the conductor is supplied to a load. A plug to supply,
A plug blade in contact with the conductor by being inserted into the case through the opening and rotating in a predetermined direction, and
An open / close unit that conducts / cuts off the power supply path to the load via the plug blade;
An operation unit that displaces between a conduction position for conducting the power supply path by the opening and closing unit, and a blocking position for blocking the power supply path by the opening and closing unit;
With
In the operation unit, the switching from the blocking position to the conducting position interferes with the duct from when the plug blade inserted in the case starts to rotate until reaching a predetermined mounting completion position. When the plug blade is in the attachment completion position, the plug can be switched from the blocking position to the conduction position. The operation unit is configured to be movable in a normal direction of the one surface of the case,
The end face of the operation unit switched to the blocking position is positioned to face one surface of the duct from the start of rotation of the plug blade inserted into the case to the attachment completion position. ,
2. The plug according to claim 1, wherein when the plug blade is in the attachment completion position, the operation unit switched to the conduction position is fitted into the opening of the case.   The plug according to claim 2, wherein the operation unit also serves as a positioning unit that fixes the plug blade at the attachment completion position. The operation unit is configured to be displaceable in a rotation direction or a normal direction of the one surface of the case,
The end face of the operation unit that has been switched to the blocking position is positioned so as to face one surface of the duct until the stopper blade inserted into the case starts rotating and before reaching the attachment completion position. And
The said operation part switched to the said conduction | electrical_connection position is located facing the said side surface of the said longitudinal direction of the said duct when the said plug blade exists in the said installation completion position. Plug.   The plug according to claim 4, further comprising a positioning portion that fits into the opening of the case when the plug blade is in the attachment completion position.   6. The open / close section moves the plug blade through an elastic body in conjunction with displacement of the operation section, thereby bringing the plug blade into and out of contact with the conductor. Or the described plug. The opening / closing part is
A rotating plate that rotates in conjunction with the displacement of the operation unit;
6. A terminal plate having elasticity and comprising a terminal plate that conducts and cuts off a power supply path to the plug blade by bending when the rotating plate comes into contact. The plug described. 8. The power supply device according to claim 1, wherein an opening is formed in a longitudinal direction on one surface of a long hollow case, and is attached to a duct that holds a conductor along the longitudinal direction inside the case and receives power from the conductor. With a plug of
A lighting fixture that is supplied with electric power from the plug. A duct that forms an opening in the longitudinal direction on one surface of a long hollow case, and holds a conductor along the longitudinal direction inside the case;
An illumination system comprising one or more illumination fixtures according to the eighth embodiment.

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