JP2005268163A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize conduction of a lamp pin connected to a socket. <P>SOLUTION: A luminaire is provided with a lamp holding unit 7 with holders for housing sockets arranged at both ends of a cylinder 2 for housing a straight-tube fluorescent lamp 1; and the lamp 1 is connected to the sockets in the holders by mounting the lamp 1 from the lamp replacement side at one end of the lamp holding unit 7 toward the closing side at the other end thereof. The socket disposed in the holder on the lamp replacement side is of an insertion type to be connected by inserting a lamp pin; and the socket 4 disposed in the holder 6 on the closing side is of a rotary type to be connected by rotating the lamp pin after inserting it. Reliability of conduction is improved by thus changing the contact method of the lamp pin of the socket on the closing side from a conventional butt type to the rotary type. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention mainly relates to a lighting fixture for a lamp socket such as an explosion-proof lighting fixture.

2. Description of the Related Art Conventionally, in an explosion-proof illuminator that uses a socket body and a lamp in a sealed cylinder, lamp replacement is performed by opening and closing one end of a lamp holding unit including a cylinder and holders and sockets at both ends of the cylinder. At this time, since the lamp held in the socket is taken out by taking out the socket, the lamp replacement socket must hold the lamp sufficiently. Further, since the lamp cannot be taken out if the lamp holding force of the other closing side socket is larger than the lamp replacement side, the contact with the lamp pin of the closing side socket is generally performed by using a contact method (for example, Patent Document 1).
JP-A-11-53930

  However, in the contact method such as the lighting fixture of the above-described conventional example, the conductive plate of the socket and the tip of the lamp pin are in point contact, and there is a possibility that conduction may become unstable. Further, since the lamp is exchanged by holding the end of the lamp from one end of the lamp holding unit, it is difficult to bring it to the center of the socket receiving surface due to the weight of the lamp on the closed side. For this reason, the socket receiving surface is provided with a taper that guides the lamp pin to the center of the receiving plate. This may interfere with contact with the camera and cause inconvenience and overheating.

  Therefore, an object of the present invention is to provide a luminaire that can stabilize the conduction of a lamp pin connected to a socket.

  In order to solve the above-mentioned problems, a lighting apparatus according to claim 1 of the present invention includes a lamp holding unit in which holders for receiving sockets are arranged at both ends of a cylinder for storing a straight tube fluorescent lamp, and is provided at one end of the lamp holding unit. In the lighting fixture in which the lamp is mounted from the lamp replacement side toward the closing side at the other end, and the lamp and the socket are connected in the holder, a lamp pin is inserted into the socket arranged in the holder on the lamp replacement side The socket disposed in the holder on the closing side is a rotary type that is connected by rotating after inserting the lamp pin.

  The lighting fixture according to claim 2 is the lighting fixture according to claim 1, wherein the socket disposed in the holder on the lamp replacement side is inserted into the holder and rotated to conduct with the contact on the holder side. I made it.

  The lighting fixture according to claim 3 is the lighting fixture according to claim 1 or 2, wherein the socket disposed in the holder on the closing side is configured such that the rotor in which the lamp pin insertion groove is formed is rotatable with respect to the socket body. And a guide portion for guiding the lamp pin is provided at both ends of the lamp pin insertion groove.

  According to a fourth aspect of the present invention, in the luminaire according to the third aspect, the lamp pin insertion groove is inserted in a state where two lamp pins are arranged vertically.

  According to the lighting apparatus of the first aspect of the present invention, the socket arranged in the holder on the lamp replacement side is a plug-in system connected by inserting the lamp pin, and the socket arranged in the holder on the closing side has the lamp pin. Since it is a rotary type that is connected by being rotated after being inserted, the reliability of conduction is improved by changing the contact method of the lamp pin of the socket on the closed side from the conventional butt to the rotary type. That is, by making the socket rotary, contact is possible on the side surface of the lamp pin, so that conduction can be stabilized.

  According to the second aspect of the present invention, since the socket disposed in the lamp replacement side holder is inserted into the holder and rotated to conduct with the contact on the holder side, wiring is not required in the holder, thereby improving workability. To do.

  According to a third aspect of the present invention, the socket disposed in the holder on the closing side is provided with a rotor having a lamp pin insertion groove formed so as to be rotatable with respect to the socket body, and provided with guide portions for guiding the lamp pin at both ends of the lamp pin insertion groove. Therefore, by carrying out the replacement work while holding one end side of the lamp, even if the lamp shaft on the other end side of the lamp is displaced from the center, the lamp pin can be guided to the center by the guide portion and inserted into the lamp insertion groove.

  According to the fourth aspect of the present invention, the lamp pin insertion groove is inserted in a state in which the two lamp pins are lined up and down. Even if it is displaced in the direction, the lamp pin is guided from the bottom to the top by the guide portion. In addition, even if the lamp pin position is shifted downward due to the change of the lamp tube diameter, the lamp pin is similarly guided by the guide portion, so that the difference in the lamp tube diameter can be dealt with.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of the lamp holding unit of the lighting apparatus according to the first embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. 3A is a partially broken perspective view showing a state before the socket connection on the lamp replacement side of the lamp holding unit of the first embodiment of the present invention, and FIG. 3B shows a state after the socket connection. FIG. 4 is a partially broken perspective view, and FIG. 4 is an exploded perspective view thereof.

  As shown in FIGS. 1 to 4, a lamp holding unit 7 in which holders 5 and 6 for storing sockets 3 and 4 are arranged at both ends of a cylinder 2 for storing a straight tube fluorescent lamp 1 is provided. The lamp 1 is mounted from the lamp replacement side at one end of the lamp holding unit 7 toward the closing side at the other end, and the lamp 1 and the sockets 3 and 4 are connected in the holders 5 and 6. Further, the socket 3 disposed in the lamp replacement side holder 5 is connected by inserting a lamp pin, and the socket 4 disposed in the closing side holder 6 is connected by rotating after inserting the lamp pin. Is rotary.

  On the closed side, as shown in FIGS. 1 and 2, the socket 4 is provided with a rotor 11 in which a lamp pin insertion groove 10 is formed so as to be rotatable with respect to the socket body 12, and lamp pins are provided at both ends of the lamp pin insertion groove 10. A guide portion 13 for guiding is provided. The socket body 12 is formed with an opening 14 for receiving the rotor 11 in a receiving surface portion 12a for receiving a lamp cap. Guide portions 13 are formed on the metal receiving surface portion 12 a located at the edge of the opening portion 14 so as to align with both ends of the lamp pin insertion groove 10. The guide portion 13 is tapered so as to be inclined from the metal receiving surface portion 12 a to the lamp pin insertion groove 10. In this case, since the two lamp pins are inserted in the lamp pin insertion groove 10 in a state where they are aligned vertically, the guide portion 13 is disposed vertically. A pair of connection terminals 15 for connecting the lamp pins are fixed inside the socket body 12. The connection terminal 15 can hold two lamp pins from the side in a state where the connection terminal 15 is rotated 90 degrees after the lamp is inserted. Further, the conductive plate 16 and the connection terminal 15 disposed on the upper surface of the socket body 12 are integrally formed. The conductive plate 16 is an elastic piece that is long in the lamp axis direction and is curved in a direction protruding from the upper surface of the socket body 12, and is in contact with a fixed contact on the holder 6 side. Further, the outer peripheral surface excluding the metal receiving surface portion 12 a and the upper surface of the socket body 12 is formed so as to be fitted to the inner peripheral surface of the holder 6.

  A stopper portion 17 is formed on the inner peripheral surface on the lamp side of the holder 6, and the metal receiving surface portion 12 a of the socket body 12 abuts against the stopper portion 17 and is positioned. The holder 6 has a hole 18 for mounting a terminal unit (not shown) on the upper surface. The terminal unit has a fixed contact of the output terminal A from the ballast of the instrument body. A holder cover 19 is attached to the holder 6 on the side opposite to the lamp 1. A spring 20 that biases the socket body 12 is provided on the inner surface of the holder cover 19. The holder cover 19 is closed when the lamp is mounted.

  On the lamp replacement side, as shown in FIGS. 3 and 4, the socket 3 has a lamp pin insertion hole 25 formed in the receiving surface portion 3 a that receives the lamp cap, and an opening 26 formed in the upper surface. A pair of connection terminals 27 for connecting lamp pins are fixed inside the socket 3. The connection terminal 27 has a lamp pin holding portion 27a that holds the lamp pins one by one. Further, the conductive plate 28 and the connection terminal 27 disposed on the upper surface of the socket 3 are integrally formed. The conductive plate 28 is an elastic piece that is long in a direction perpendicular to the lamp axis direction and curved in a direction protruding from the opening 26 on the upper surface of the socket 3. A terminal unit 29 is mounted in a hole opened on the upper surface of the holder 5. The terminal unit 29 has a pair of contacts 29a. Then, by inserting the socket 3 into the holder 5 and rotating it, the conductive plate 28 and the contact point 29a are electrically connected. Further, the outer peripheral surface excluding the metal receiving surface portion 3 a and the upper surface of the socket 3 is formed so as to be fitted to the inner peripheral surface of the holder 5. A pair of fitting projections 30 project from the periphery of the metal receiving surface portion 3a in a direction perpendicular to the direction in which the lamp pin insertion holes 25 are arranged. The fitting protrusions 30 have different widths and the same thickness. Moreover, the handle 31 is formed in the surface on the opposite side to the receiving surface part 3a.

  A pair of insertion guide grooves 32 into which the fitting protrusions 30 are inserted are formed in the lamp axis direction of the inner peripheral surface of the holder 5. The width of the insertion guide groove 32 is different depending on the width of the fitting protrusion 30. This restricts the socket insertion angle and prevents reverse insertion of the socket 3 into the insertion guide groove 32. The end of the insertion guide groove 32 on the lamp side is continuous with the fitting groove 33. The fitting groove 33 is formed in the circumferential direction of the inner peripheral surface of the holder 5, and the width thereof is approximately equal to the thickness of the fitting protrusion 30. The fitting groove 33 is fitted with the fitting projection 30 to position and fix the socket 3. Since the insertion guide groove 32 is provided in two places, the guide property is high. A detachable holder cover is attached to the side of the holder 5 opposite to the lamp 1 (not shown).

  FIG. 5 is an overall perspective view of the lighting fixture according to the first embodiment of the present invention. As shown in FIG. 5, the cylinder 2 is formed of a cylindrical light-transmitting member larger than the diameter of the lamp 1, and is fitted and fixed to the lamp-side end portions of both holders 5 and 6. Both holders 5 and 6 are attached to an appliance main body 35 having a built-in lighting circuit, and the appliance main body 35 is suspended by a ceiling attaching portion 36.

  Next, the construction procedure of the lighting fixture will be described. As shown in FIG. 1, the socket 4 is inserted into the holder 6 on the closing side, and the holder cover 19 is attached. The socket 4 is pressed by the spring 20 and is fixed in contact with the stopper portion 17. In this state, the lamp pin insertion groove 10 is vertically oriented so as to align with the guide portion 13. Next, as shown in FIG. 3A, the lamp pin at one end of the lamp 1 is inserted into the lamp pin insertion hole 25 of the socket 3 on the lamp replacement side, and is inserted into the lamp pin holding portion 27a. In this state, the socket 3 is inserted from the holder 5 together with the lamp 1 so as to hold the handle 31 and the lamp pins are arranged vertically. When inserting the socket 3 into the holder 5, after inserting the fitting protrusion 30 into the insertion guide groove 32, the socket 3 is inserted into the fitting groove 33 as shown in FIG. Rotate. Thereby, the electrically conductive plate 28 and the contact 29a contact.

  On the closed side, as shown in FIG. 1, when the fitting protrusion 30 is inserted into the insertion guide groove 32, the lamp pins at the other end of the lamp 1 are inserted into the lamp pin insertion groove 10 in a vertically aligned state. At this time, even if the lamp pin is displaced from the lamp shaft, it is guided by the guide portion 13. Note that when the lamp pin is mounted from side to side, the lamp shaft cannot be displaced. Further, the lamp pin and the connection terminal 15 come into contact with each other by rotating the lamp 1 together with the socket 3 by 90 degrees. Thus, since the socket 4 on the closed side is a rotary type, the lamp pin is not held at all when the lamp is attached and detached, so that the lamp 1 can be pulled out.

  As described above, according to this embodiment, the reliability of conduction is improved by changing the contact method of the lamp pin of the socket 4 on the closing side from the conventional butt to the rotary type. That is, by making the socket rotary, contact is possible on the side surface of the lamp pin, so that conduction can be stabilized. In addition, the lamp pin is guided from the bottom to the top by the guide portion 13 even when the lamp shaft on the other end side of the lamp 1 is shifted downward from the center by exchanging with one end side of the lamp 1. Even if the position of the lamp pin is shifted downward due to the change in the tube diameter of the lamp 1, the lamp pin is similarly guided by the guide portion 13, so that the difference in the lamp tube diameter can be dealt with.

  Further, since the lamp replacement side socket 3 can be fixed by a rotating operation, an operation of pushing the socket 3 with a holder cover becomes unnecessary, and the operability is good.

  A second embodiment of the present invention will be described with reference to FIG. FIG. 6A is a perspective view of the lamp holding unit according to the second embodiment of the present invention, and FIG. 6B is an exploded perspective view thereof. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 6, the holder 6 on the closing side and the socket 4 may be integrally formed in the first embodiment. In this case, a socket main body 40 provided with a rotatable rotor 11 is formed on the inner peripheral surface of the holder 6. Moreover, the connection terminal 15 is fixed in the holder 6, and the connection method with the instrument side of the conductive plate 41 formed integrally with the connection terminal 15 is arbitrary. In this case, the holder 6 is bent so as to come into contact with a connection portion (not shown) on the instrument side inserted into the hole 18 opened on the upper surface of the holder 6. In this embodiment, since the socket body 40 and the conductive plate 41 do not move, the connection is stable. Further, since the socket body 40 and the holder 6 can be integrated, the number of parts can be reduced and the cost can be reduced. Further, since the socket 4 does not move back and forth, a spring or the like is not necessary, and the size can be reduced.

  In addition, the guide part 13 can also be provided in the rotor 11 side. The socket 4 may be configured without a rotor.

It is a perspective view by the side of a closure of a lamp holding unit of a lighting fixture of a 1st embodiment of the present invention. FIG. 2 is an exploded perspective view of FIG. 1. (A) is a partially broken perspective view showing a state before the socket connection on the lamp replacement side of the lamp holding unit of the first embodiment of the present invention, (b) a partially broken perspective view showing the state after the socket connection. It is. FIG. 4 is an exploded perspective view of FIG. 3. It is a whole perspective view of the lighting fixture of the 1st Embodiment of this invention. (A) is the perspective view by the side of the closure of the lamp holding unit of the 2nd embodiment of the present invention, and (b) is the exploded perspective view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lamp 2 Cylinder 3 Lamp replacement side socket 4 Closure side socket 5 Lamp replacement side holder 6 Closure side holder 7 Lamp holding unit 10 Lamp pin insertion groove 11 Rotor 12 Socket body 13 Guide part 29 Terminal unit

Claims (4)

  A lamp holding unit in which holders for receiving sockets are arranged at both ends of a cylinder for storing a straight tube fluorescent lamp, and the lamp is mounted from the lamp replacement side at one end of the lamp holding unit toward the closing side at the other end, In the luminaire in which the lamp and the socket are connected in the holder, the socket arranged in the holder on the lamp replacement side is a plug-in type connected by inserting a lamp pin, and is arranged in the holder on the closed side. The socket is a rotary type connected by rotating after inserting a lamp pin.   The lighting fixture according to claim 1, wherein a socket disposed in the holder on the lamp replacement side is inserted into the holder and rotated to conduct with the contact on the holder side.   The socket disposed in the holder on the closing side is provided with a rotor in which a lamp pin insertion groove is formed so as to be rotatable with respect to the socket body, and guide portions for guiding the lamp pin are provided at both ends of the lamp pin insertion groove. The lighting fixture of 1 or 2.   The lighting fixture according to claim 3, wherein the lamp pin insertion groove is inserted in a state where two lamp pins are arranged vertically.

Images