JP2005268162A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and surely connect a lamp to a socket even when the diameter of the lamp is different without needing another member for positioning the lamp to the socket. <P>SOLUTION: A luminaire is provided with a lamp holding unit 5 with holders 4 for housing the sockets 3 arranged at both ends of a cylinder 2 for housing a straight-tube fluorescent lamp 1; and is so structured that the lamp 1 is inserted from one end side of the lamp holding unit 5. The lamp holding unit 5 has an opening/closing part 7a at least on one of the holders 4; the lamp 1 with the sockets 3 mounted at both its ends can be attached and detached through the opening/closing part 7a; and connection parts 9 respectively brought into a conductive state to both the sockets 3 with the lamp attached are formed on the holder sides. Thereby, the lamp 1 can surely be connected to the sockets 3 even if the diameter of the lamp 1 is different. That is to say, since the sockets 3 are mounted to both the ends of the lamp 1 before inserting it in the cylinder 2, the need of a member and a guide for positioning them is obviated. <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.

  Conventionally, in an explosion-proof lighting fixture that uses a socket body and a lamp in a sealed cylinder, a suitable lamp is determined for each fixture, and a fixture and cylinder design that matches the thickness of each lamp is required. It was made. However, when trying to share a cylinder, the thickness of the cylinder is designed to match the thickest lamp diameter, so when using the lamp with the narrowest diameter, the gap between the lamp and the cylinder becomes large. End up.

  That is, FIG. 7 is a cross-sectional view of the main part showing the problems of the conventional lighting fixture. In this way, in the lamp holding unit comprising the cylinder 51 and the holders 52 and sockets 53 at both ends thereof, the lamp 50 is inserted from the back side of one socket and fits into the other socket 53 through the cylinder 51. I have to let it. In this lamp mounting operation, since the work is performed with only one end of the lamp 50, it is difficult to insert the lamp 50 with the other end floating (particularly when the lamp length is long). In that case, the ramp 50 is tilted by gravity due to a gap between the cylinder 51 and the tip of the ramp is inserted in contact with the inner surface of the cylinder.

  Since the socket 53 is arranged at the center of the cylinder 51, the lamp 50 cannot be fitted into the socket 53 in a state where the tip of the lamp is in contact with the inner surface of the cylinder.

  In view of this, a method has been devised in which a ring part is used that is mounted on the lamp and elastically contacts the inner surface of the cylinder so that the lamp can be inserted with the center in the cylinder horizontal (for example, Patent Document 1).

  Moreover, there exists a lighting fixture which attaches or detaches a lamp | ramp from the end of a lamp holding unit in the state which mounted | wore with one socket (for example, patent document 2). In this case, in order to take out the lamp together with 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 method with the lamp pin of the closing side socket is generally used.

In addition, there is a lighting fixture that is inserted into the cylinder in a state where the lamp has already been connected (for example, Patent Document 3). In this case, the socket is connected to both ends of the lamp, and the sockets are inserted into the cylinder in a state where the sockets are connected by a conductive wire.
Japanese Utility Model Publication No. 63-85807 JP-A-11-53930 Noboru No.-3068726

  However, in the case of using the ring component in the conventional lighting fixture, the cost for the ring component is increased, and the ring component is behind the lamp, and the light distribution and appearance are deteriorated.

  In the mating method, 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.

  Further, when the connection of the lamp is completed in advance, it takes time to insert the conductive wire connected to the socket in the cylinder. Further, there is a problem that a space for arranging the conducting wire in the cylinder is required and the conducting wire portion is shaded.

  Therefore, the object of the present invention is that no other member for aligning the lamp and the socket is required, and the lamp and the socket can be easily and reliably connected even when the diameter of the lamp is different, and the cylinder is shaded. There is no lighting fixture to provide.

  In order to solve the above-described problem, 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 fluorescent lamp, and one end side of the lamp holding unit. In the lighting fixture to which the lamp is mounted, the lamp holding unit has an opening / closing part in at least one of the holders, and the lamp is attachable / detachable with sockets attached to both ends from the opening / closing part. A connection portion that is electrically connected to both sockets in the mounted state is provided on the holder side.

  The lighting fixture according to claim 2 is the lighting fixture according to claim 1, wherein the socket has a portion whose outer diameter is substantially the same as the inner diameter of the holder.

  According to the lighting apparatus of the first aspect of the present invention, the holding unit has an opening / closing part in at least one holder, the lamp is attachable / detachable with the sockets attached to both ends from the opening / closing part, and the lamp mounting In this state, since the connection portion that is in a conductive state with both sockets is provided on the holder side, the lamp and the socket can be reliably connected even when the lamp diameter is different. That is, since the sockets are attached to both ends of the lamp before being inserted into the cylinder, no alignment member or guide is required. Along with this, both sockets can be plugged in, so the contact is stable. Further, since the connecting portion and the socket are brought into a conducting state simply by inserting the lamp together with the socket, wiring in the cylinder is unnecessary. For this reason, the attachment workability | operativity of a lighting fixture improves and a cylinder does not have a shade.

  According to the second aspect of the present invention, since the socket has a portion whose outer diameter is substantially the same as the inner diameter of the holder, the socket can be positioned in a direction perpendicular to the lamp axial direction.

  A first embodiment of the present invention will be described with reference to FIGS. 1 is an exploded perspective view of a lighting apparatus according to a first embodiment of the present invention, FIG. 2 is a sectional view of the lamp mounted state, and FIG. 3 is an overall perspective view.

  As shown in FIG. 1 and FIG. 2, a lamp holding unit 5 in which holders 4 for storing sockets 3 are arranged at both ends of a cylinder 2 for storing a straight tube fluorescent lamp 1, and the lamp 1 is mounted from one end side of the lamp holding unit 5. It is a configuration to be mounted.

  In the straight tube fluorescent lamp 1, a lamp pin protruding from a lamp base is connected to a socket 3. The cylinder 2 is formed of a cylindrical light-transmitting member that is larger than the diameter of the lamp 1 and has a length substantially the same as that of the lamp 1. The sockets 3 are both plug-in types, and contain connection terminals for connecting lamp pins of the lamp 1 (not shown). Further, a pair of conductive plates 6 that are electrically connected to the connection terminals are attached to the upper surface of the socket 3. The conductive plate 6 is an elastic piece that is long in the lamp axis direction and curved in a direction protruding from the upper surface of the socket 3. Further, the socket 3 has a portion whose outer diameter is substantially the same as the inner diameter of the holder 4. In this case, the receiving surface portion 3a of the socket 3 that receives the lamp cap is formed so as to protrude from the upper surface and fit to the inner surface of the holder. Further, a projecting piece 3b is provided on the surface of the socket 3 opposite to the receiving surface portion 3a. The holder 4 has a cylindrical shape having an inner diameter that is substantially the same as the outer diameter of the metal receiving surface portion 3 a of the socket 3. One of the holders 4 is opened, and a holder cover 7 is attached to the other. A fitting portion 4 a for fitting the end portion of the cylinder 2 is formed in the opening of the holder 4. In this case, the inner diameter of the holder 4 and the inner diameter of the cylinder 2 are substantially the same. A contact unit 8 is mounted in a hole opened in the upper surface of the holder 4. On the inner surface side of the holder 4 of the contact unit 8, a pair of connection portions 9 that are in contact with the conductive plate 6 of the socket 3 are provided. Of the holders 4 at both ends of the cylinder 2, the holder cover 7 a of one holder 4 is an opening / closing portion, and the holder cover 7 b of the other holder 4 is closed. A spring 10 for biasing the socket 3 is provided on the inner surface of the closed holder cover 7b.

  Further, as shown in FIG. 3, both holders 4 are attached to an instrument main body 12 having a built-in lighting circuit, and the instrument main body 12 is suspended by a ceiling attaching portion 13.

  Next, the construction procedure of the lighting fixture will be described. As shown in FIG. 1, sockets 3 are attached to both ends of the lamp 1. The lamp pin contact is pluggable as described above and holds the lamp pin firmly. The holder cover 7a of one of the holders 4 is opened, and the lamp 1 with the sockets 3 attached to both ends is inserted from the holder 4 into the both ends. Since the inner surface of the lamp holding unit 5 has no projection from the holder 4 to the cylinder 2, the socket 3 can move freely. When the lamp is mounted, the lamp 1 is arranged so as to correspond to the cylinder 2, and both the sockets 3 are accommodated in the holder 4. At this time, in both sockets 3, the conductive plate 6 and the connecting portion 9 are pressed by elasticity and become conductive. Thereafter, when the holder cover 7a is closed, the other socket 3 is pressed in the lamp axis direction by the spring 10, and the projecting piece 3b of the one socket 3 comes into contact with the inner side surface of the holder cover 7a to be positioned. If there is no gap between the projecting piece 3b of the other socket 3 and the holder cover 7b, the spring 10 is not necessary. In this case, the lamp 1 can be similarly inserted from the other holder 4 side. As a result, the lamp can be exchanged from both sides, so that the installation of the instrument is not affected. That is, a space for taking out the lamp is necessary on the lamp replacement side, and when the lamp can be replaced only from one side, the direction is limited at the difference between the walls.

  As described above, according to this embodiment, the lamp 1 and the socket 3 can be reliably connected even when the diameter of the lamp 1 is different. That is, since the sockets 3 are attached to both ends of the lamp 1 before being inserted into the cylinder 2, no alignment member or guide is required. As a result, both sockets 3 can be plugged in, so that the contact is stable. Moreover, since the connecting portion 9 and the conductive plate 6 of the socket 3 are brought into conduction only by inserting the lamp 1 together with the socket 3, wiring in the cylinder 2 is unnecessary. For this reason, the attachment workability | operativity of a lighting fixture improves, and a shade does not arise in the cylinder 2. FIG. The conductive plate 6 may be fixed, and the connecting portion 9 may be a movable member having elasticity.

  A second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cutaway perspective view of the main part of the second embodiment of the present invention.

  As shown in FIG. 4, the structure of the holder 15 on the closing side and the socket 16 accommodated in the holder 15 are different from those of the first embodiment. The holder 15 has no holder cover and is completely closed, and there is no spring. Further, a pair of elastic contact pieces 17 are arranged instead of the terminal unit mounted in the hole opened on the upper surface of the holder 15. The tip of the elastic contact piece 17 is bent so as to face the inner surface of the end portion of the holder 15 to form a connection portion 17a. The socket 16 has a pair of fixed contacts 18 which are connected to the connection terminal instead of the conductive plate and project from the surface opposite to the metal receiving surface 16a, and have no projecting piece. The connection part 17a of the fixed contact 18 and the elastic contact piece 17 is arranged so as to be in contact and in a conductive state in the lamp mounted state. In addition, the elastic contact piece 17 serves as a spring, and the lamp 1 can be positioned as in the first embodiment. Other configurations are the same as those of the first embodiment.

  A third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cutaway perspective view of the main part of the third embodiment of the present invention.

  As shown in FIG. 5, as in the second embodiment, a pair of elastic contact pieces 17 is disposed in a hole opened on the upper surface of the holder 15, and a fixed contact 18 is disposed on the socket 16 on the side opposite to the metal receiving surface portion 16a. Projected on the surface. In this case, the tip of the elastic contact piece 17 is bent so as to face the inner surface of the end portion of the holder 15, and a sandwiching portion 17 b serving as a connection portion is formed. In the lamp mounted state, the fixed contact 18 is sandwiched by the sandwiching portion 17b of the elastic contact piece 17 and becomes conductive. Other configurations are the same as those in the first and second embodiments.

  A fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a fragmentary perspective view of a fourth embodiment of the present invention.

  As shown in FIG. 6, the structure of the holder 15 on the closing side and the socket 20 accommodated in the holder 15 are different from those of the first embodiment. The holder 15 has no holder cover and is completely closed, and there is no spring. Further, the pair of connection portions 9 of the terminal unit 8 mounted in the hole opened on the upper surface of the holder 15 slides up and down. The socket 20 is formed in a cylindrical shape so as to be inserted with a little play in the radial direction inside the holder 15. A pair of conductive plates 21 are arranged on the entire circumference of the socket 20 so as to correspond to the connection portion 9. Further, the connecting portion 9 slides up and down to give a contact force to the conductive plate 21.

  Further, the configuration other than the holder cover of the holder on the insertion side and the socket may be the same as the configuration of the holder 15 and the socket 20 on the closing side. In this case, since the electrical conduction is performed regardless of the angle around the lamp axis when inserted, the lamp can be replaced without worrying about the angle of the lamp, and the operability is good. Thereby, even when the lamp pin is inclined with respect to the lamp axis, the lamp can be reliably connected. Other configurations are the same as those of the first embodiment.

It is a disassembled perspective view of the lighting fixture of the 1st Embodiment of this invention. It is sectional drawing of the lamp mounting state of the 1st Embodiment of this invention. It is a whole perspective view of the lighting fixture of embodiment of this invention. It is a principal part fracture perspective view of the 2nd Embodiment of this invention. It is a principal part fracture perspective view of the 3rd Embodiment of this invention. It is a principal part fracture perspective view of the 4th Embodiment of this invention. It is principal part sectional drawing which shows the problem of the conventional lighting fixture.

Explanation of symbols

1 Lamp 2 Cylinder 3 Socket 4 Holder 5 Lamp holding unit 9 Connection

Claims (2)

  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 holding unit is attached to the lamp from one end side of the lamp holding unit. The holder has an opening / closing part, the lamp can be attached and detached from the opening / closing part with a socket attached to both ends, and a connecting part is provided on the holder side that is electrically connected to both sockets when the lamp is attached. A lighting apparatus characterized by that.   The lighting apparatus according to claim 1, wherein the socket has a portion whose outer diameter is substantially the same as the inner diameter of the holder.

Images