JPH057696Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a back terminal type discharge lamp ballast used in a discharge lamp such as a fluorescent lamp.

[Background technology]

In discharge lamp ballasts that use terminals on the surface that is not attached to the discharge lamp body, the terminals are higher than the discharge lamp body, so the wiring that connects each component within the discharge lamp body is flat. It cannot reach the top and passes through the top, bottom, left and right of the discharge lamp ballast and other parts. As a result, the wiring becomes unsightly and long, and a cover is required to protect the live parts of the discharge lamp ballast. Since this cover is attached to the surface, it is necessary to use mounting screws or the like to prevent it from being easily removed, which poses problems such as an increase in the number of parts and a complicated structure.

Therefore, a back terminal type discharge lamp ballast shown in FIGS. 4 and 5 is used. This discharge lamp ballast has a back plate 6 which is a mounting surface of the ballast exterior 61.
A terminal 64 is provided near the inner surface of the back plate 62a, and a cutout hole 65 used for soldering wiring to the terminal 64 is formed in the back plate 62a.
The ballast exterior 61 consists of a base plate 62 and a cover 63, and the bottom wall of the base plate 62 is connected to the back plate 62a.
becomes. The terminal 64 is an insulating base material 6 such as a coil bobbin.
It protrudes from the side end surface of 6. The base plate 62 is attached to the discharge lamp main body 67 with attachment screws or the like. The discharge lamp main body 67 is provided with a floating portion 68 consisting of a countersink to ensure an insulating distance between the terminal 64 and the solder etc. connected to the terminal 64 and the discharge lamp main body 67.

However, this structure requires the provision of a floating portion 68, which complicates the machining of the discharge lamp main body 67. Also, the mounting position of the discharge lamp ballast is 6
8, and furthermore, the floating portion 6
8, there is a problem in that attachment of other parts is restricted.

[Purpose of invention]

The purpose of this invention is to provide a back terminal type discharge lamp ballast that has a simple structure and does not require the processing of a raised part for ensuring insulation distance on the discharge lamp apparatus body.

[Disclosure of invention]

The discharge lamp ballast of this invention has a pair of terminals located near the inner surface of both ends of the back plate, which is the mounting surface of the ballast exterior, and a pair of terminals for wiring work with the pair of terminals exposed on the back plate. In a discharge lamp ballast provided with notched holes and a pair of insulating covers covering the pair of terminals in the pair of notched holes,
the pair of terminals protrude from the insulating base material in the ballast exterior toward the ends in the longitudinal direction of the back plate, and are arranged near both ends of the back plate so as to be offset to one side in the width direction of the back plate; The pair of notch holes are provided on the back surface of the insulating base material so as to expose portions near the pair of terminals and are offset in the same direction as the pair of terminals, and the pair of notch holes on the back surface of the insulating base material are provided so as to expose portions near the pair of terminals. A mounting hole is provided in the exposed portion, the pair of insulating covers are made to have the same shape, each forming a pair of mounting claws arranged in the longitudinal direction of the back plate, and one of the pair of mounting claws is mounted. The pair of insulating covers are attached by fitting the claws into the attachment holes of the insulating base material.

According to the structure of this invention, an insulating cover that covers the terminal is provided in the notch hole for wiring work on the ballast exterior, so even though it is a back terminal type with the terminal near the back plate, there is no insulation on the discharge lamp body. There is no need to provide a floating part to ensure distance. Since the insulating cover is interposed between the discharge lamp apparatus main body and a part of the discharge lamp ballast, the mounting claw alone can provide enough mounting strength to prevent the discharge ballast from falling off when it is not attached.
Therefore, unlike the case where the ballast is provided on the surface of the discharge lamp ballast, it is possible to prevent the ballast from falling off with a simple mounting structure without using screws or the like. Further, since the insulating cover does not protrude to the back side from the back plate, the height of the discharge lamp ballast does not change when it is attached to the discharge lamp apparatus body. In addition, the terminals are offset so that the wiring connected to the terminals can come out from one side of the discharge lamp ballast, a pair of mounting claws are provided on the insulating cover, and the same shape is used for the pair of insulating covers. Therefore, the number of types of parts can be reduced.

Embodiment An embodiment of this invention will be described based on FIGS. 1 to 3. This discharge lamp ballast has a pair of terminals 4 arranged near the inner surface of both ends of a back plate 2a, which is the mounting surface of the ballast exterior 1, and a pair of terminals 4 for wiring work exposed on the back plate 2a. A pair of notch holes 5 are provided, and a pair of insulating covers 6 made of resin or the like are provided in the pair of notch holes 5 to cover the pair of terminals 4. The ballast exterior 1 is formed of a base plate 2 having a substantially hat-shaped cross section and a front cover 3, and the bottom wall of the base plate 2 serves as a back plate 2a. Base plate 2 and front cover 3
and are crimped together in a rolled-up state at a crimped portion 7. The ballast exterior 1 houses a coil bobbin in which a coil is wound around an insulating base material 8, and the terminals 4 protrude from both ends of the insulating base material 8. That is, terminals 4 are provided near both ends in the longitudinal direction of the back plate 2a so as to protrude toward the ends. These terminals 4 are offset to one side in the width direction of the back plate 2a so that the wiring can be led out to one side of the discharge lamp ballast, and the notch holes 5 are also offset in the same direction accordingly. . The notch hole 5 is sized so as to expose a portion of the back surface of the insulating base material 8 near the terminal 4, and a mounting hole 9 is formed in the insulating base material 8 at this exposed portion.

The insulating covers 6 provided in both notch holes 5 have the same shape, and each insulating cover 6 has the same shape as that provided in both notch holes 5.
It has a pair of attachment claws 10 arranged in the longitudinal direction of a. The insulating cover 6 is mounted by fitting one of the pair of mounting claws 10 into the mounting hole 9 of the insulating base material 8. The other mounting claw 10
is located on the tip end side of the terminal 4 and is loosely fitted into the notch hole 5. As shown in FIG. 3, the mounting claw 10 consists of a pair of non-return elastic split claws 10a.

As shown in FIG. 2, the base plate 2 is attached to the discharge lamp main body 11 with mounting screws or the like.

According to this configuration, since the insulating cover 6 that covers the terminal 4 is provided in the notch hole 5, although it is a back terminal type having the terminal 4 near the back plate 2a, there is a floating surface on the discharge lamp main body 11 to ensure an insulation distance. Sufficient dielectric strength can be obtained even without providing a ridge. Also, even if the solder connecting the wire to terminal 4 comes off in an abnormal situation,
Because of the insulation cover 6, the wiring is connected to the discharge lamp fixture body 11.
It is safe and does not come into contact with. Since the insulating cover 6 is interposed between the insulating base material 8 and the discharge lamp apparatus main body 11, it is only necessary that the insulating cover 6 has enough mounting strength to prevent it from falling off when the discharge lamp ballast is not attached, and the mounting claws 10 are sufficient. Provides mounting strength. Therefore,
No screws are required, and design and manufacture are easy. Since the insulating cover 6 does not protrude further back than the back plate 2a, the height of the discharge lamp ballast does not change when it is attached to the discharge lamp apparatus body 11.

Furthermore, in this embodiment, the terminals 4 are arranged at one side so that the wiring connected to the terminals 4 can be brought out from one side of the discharge lamp ballast. Although the insulating covers 6 are arranged on one side, the same shape can be used for the insulating covers 6 on both sides, thereby reducing the number of types of parts. This will be explained. Back plate 2
It is desirable that a has a large contact area with the discharge lamp main body 11 so that heat conduction to the discharge lamp apparatus main body 11 can be improved and heat dissipation from the discharge lamp ballast can be performed well.
Therefore, it is desirable that the notch hole 5 is small, and if the terminal 4 is biased to one side, the notch hole 5 must also be biased to one side of the back plate 2a. However, if the notch hole 5 is shifted to one side in this way, it becomes impossible to provide the attachment hole 9 at the center of the notch hole 5 in the width direction. Therefore, one mounting claw 10 is attached to the insulating cover 6.
If only the above is provided, two types of insulating covers 6 provided in the notch holes 5 on both the left and right sides, each having a mounting claw 10 in a different position, will be required. Therefore, in this embodiment, two mounting claws 10 are provided on the insulating cover 6, and mounting claws 10 that are opposite to each other are used for the notch hole 5 on the left and the notch hole 5 on the right in the figure. 9
The same insulating cover 6 can be used for the asymmetric cutout hole 5. Although the mounting claw 10 loosely fitted on the outside of the terminal 4 has some play, it prevents the wiring from hitting the base plate 2 when the solder comes off, improving safety.

[Effect of idea]

The discharge lamp ballast of this invention has an insulating cover that covers the terminal in the notch hole for wiring work on the ballast exterior, so although it is a back terminal type with the terminal near the back plate, it can be attached to the main body of the discharge lamp device. There is no need to provide a floating part to ensure insulation distance. Since the insulating cover is interposed between the lamp fixture main body and a part of the discharge lamp ballast, the mounting claw alone can provide enough mounting strength to prevent the discharge lamp ballast from falling off when it is not attached. Therefore, unlike the case where it is provided on the surface of the discharge lamp ballast, it is possible to prevent it from falling off with a simple mounting structure without using screws or the like. Furthermore, since the insulating cover does not protrude further back than the back plate, the height of the discharge lamp ballast does not change when it is attached to the discharge lamp apparatus body. In addition, the terminals are placed on one side so that the wiring connected to the terminals can come out from one side of the discharge lamp ballast.
Since a pair of mounting claws are provided on the insulating cover and the same shape is used for the pair of insulating covers, the number of types of parts can be reduced.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the first embodiment of this invention, Fig. 2 is a front view thereof, Fig. 3 is a partially enlarged perspective view thereof, Fig. 4 is a front view of the conventional example, and Fig. 5 is a front view thereof. It is a back view. 1... Ballast exterior, 2... Base plate, 2a...
Back plate, 3... Front cover, 4... Terminal, 5, 5',
5″……Notch hole, 6,6′,6″……Insulating cover,
9...Mounting hole, 10...Mounting claw, 11...Discharge lamp body.

Claims (1)

[Claims for Utility Model Registration] A pair of terminals are provided near the inner surface of both ends of a back plate serving as a mounting surface for the ballast exterior, and a pair of notches for wiring work are provided in the back plate with the pair of terminals exposed. In a discharge lamp ballast provided with a hole and a pair of insulating covers covering the pair of terminals in the pair of notched holes, the pair of terminals are inserted from the insulating base material in the ballast exterior to the longitudinal direction of the back plate. The pair of notch holes are arranged in the vicinity of both ends of the back plate to one side in the width direction of the back plate, and the pair of notch holes are formed on the back side of the insulating base material near the pair of terminals. are exposed and offset in the same direction as the pair of terminals, a mounting hole is provided in the exposed portion of the pair of notch holes on the back surface of the insulating base material, and the pair of insulating covers are made to have the same shape as each other. a pair of mounting claws arranged in the longitudinal direction of the back plate, respectively, and one of the pair of mounting claws is fitted into the mounting hole of the insulating base material to attach the pair of insulating covers. A discharge lamp ballast characterized in that it is adapted to be installed.