JPH0743999Y2 - Electronic ballast - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to an electronic ballast.

[Conventional technology]

The terminals of discharge lamp ballasts, especially electronic ballasts for converting commercial AC voltage into high-frequency voltage, are usually stop terminals. Normally, only one lead wire can be connected to the female terminal, so that when the feed wiring is performed, for example, another female terminal is required for the lead wire for feeding.

Therefore, conventionally, as shown in FIG. 17 and FIG. 18, an input terminal 53 and a feed terminal 54 are provided on the end face 52a side of one end of the printed circuit board 52 of the electronic ballast 51 of the lighting fixture 50. ing. 55 is a commercial power supply, 56 is a discharge lamp, 57 is a lead wire that serves as a power supply wire, 57a to 57c are lead wires that are feed wires and serve as power supply wires, 57d is a lead wire that serves as a feed wire, and 58 is a printed circuit board 52. A metal case having a U-shaped cross section covering the pattern wiring side, and 59 are patterns on the pattern wiring side of the printed board 52.

However, there is a drawback in that the lead wires 57, 57a to 57d are erroneously wired or the lead wires 57, 57a to 57d are twisted and unsightly when the device is assembled. Further, since the terminals 53 and 54 are provided with an insulating space, respectively, the width of the printed circuit board 52 is increased as a whole, which makes it difficult to make a thin printed board, which is a design limitation.

On the other hand, as shown in FIG. 19, it is conceivable that a printed board 60 is provided with an input terminal 61 and a feed terminal 62 on both sides of one end thereof. According to this, since the lead wire 57 that serves as a power supply line and the lead wire 57a that serves as a feed line are pulled in from the side portion of the printed circuit board 60, wiring with an adjacent block can be performed smartly, and misconnection can be prevented. In terms of shape, a thin block design is possible.

Even when a terminal to which two or more lead wires can be connected is used, the same configuration as above may be taken for the sake of clear wiring.

[Problems to be solved by the device]

However, as shown in FIG. 20, the charging portion 64 of the lead wire 57a is
And the side edge 65 of the case 64 are in contact with each other, the outer cover of the lead wire 57 is damaged by the edge of the side edge 66 of the case 64, and the side edge 66 and the charging portion 63 of the lead wire 57 are in contact with each other, resulting in poor insulation. There was a risk of causing.

Therefore, an object of the present invention is to provide an electronic ballast that can prevent misconnection of the input wire and the insulation of the input wire and the case.

[Means for Solving the Problems]

The electronic ballast of the present invention is a substantially rectangular parallelepiped electronic ballast in which the feed lines of input lines are connected in parallel with a plurality of straight tube lamps arranged side by side, and one end of the ballast is connected. A rectangular printed circuit board having a wide width portion and terminals on both sides of the wide width portion; and an inner width wider than the lateral width of the printed wiring board and narrower than the width of the wide width portion and having the wide width. A case in which a notch for supporting a portion is formed on both side plates of one end of the case, and both side edges of the wide portion are formed as the notches with the pattern wiring side of the printed circuit board facing the inner bottom surface of the case. The printed circuit board is supported and attached to the case.

[Action]

According to the configuration of the present invention, since the pattern wiring side of the wide portion is supported by the notch of the case having a substantially U-shaped cross section, the end portion of the notch of the case is covered with the wide portion, and the side opposite to the pattern wiring side. Since the lead wire that is connected to the terminal of and is drawn out in the width direction of the wide width portion does not contact the edge portion of the notch of the case, the outer cover of the lead wire is not damaged by the notch and the insulation failure with the case does not occur. Further, the printed circuit board is formed in a rectangular shape, and the wide portion thereof does not need to be wide as compared with the conventional case because it may be widened by a length corresponding to the thickness of the case. Also, when multiple electronic ballasts are arranged in parallel with straight tube lamps, the feed line can be connected to the terminals of the electronic ballast in a substantially straight line, which simplifies wiring and prevents misconnection. At the same time, the straight tube lamp and the feed line can be orthogonal to each other, and the portion where the straight tube lamp and the feed line are parallel can be minimized, so that the superposition of noise can be avoided.

〔Example〕

A first embodiment of the present invention will be described with reference to FIGS. That is, this electronic ballast is a printed circuit board 3 having a rectangular shape and a wide portion 7 at one end 5 and terminals 1 and 2 for connecting lead wires 9a and 9b to both ends of the wide portion 7 in the wide direction. And a case 4 having a substantially U-shaped cross section in which the pattern wiring side 6 of the printed circuit board 3 is fitted and inserted toward the inner bottom surface and having an inner width narrower than the width of the wide width portion 7, and supports the wide width portion 7. Notches 4a 'are formed in both side plates of the one end 5 of the case 4.

The terminals 1 and 2 are, for example, female terminals.

The case 4 has a notch 4a 'formed at one end 5 of each side plate 4a,
The wide end 7 of the printed circuit board 3 is supported by the cutout end surface 4b. Further, a recess 8 is formed at a corner adjacent to the notched end surface 4b of the case 4, and the end of the wide width portion 7 is locked in the recess 8 to prevent the printed circuit board 3 from floating. The printed circuit board 3 is inserted from the notch 4a 'side of the case 4, and the printed circuit board 3 is supported by the cut-and-raised pieces (not shown) for supporting and retaining the printed circuit board 3 without using screws. And the side plate 4a of the case 4 is formed higher than the printed circuit board 3.

In FIG. 4, 9b to 9d are lead wires that also serve as a feed line and a power supply line, 9e is a lead wire that serves as a feed line, 10 is a device body, and 11
Is a commercial power source, 12 is a discharge lamp ballast to which the embodiment of the present invention is applied, 13 is a discharge lamp, and 17 is a pattern on the pattern wiring side of the printed circuit board 3.

According to this embodiment, since the pattern wiring side 6 of the wide portion 7 is supported by the notch 4a 'of the case 4 having a substantially U-shaped cross section, the end of the notch 4a' of the case 4 is covered with the wide portion 7. Since the lead wires 9a to 9e connected to the terminals 1 and 2 on the side opposite to the pattern wiring side 6 and drawn in the wide width direction of the wide width portion 7 do not come into contact with the edge of the notch 4a 'of the case, the lead wire 9a It is possible to secure the insulation between the lead wires 9a to 9e and the case 4 without causing the outer sheathes of 9e to 9e to be damaged by the notch 4a 'and causing insulation failure with the case 4. Further, the wide portion 7 of the printed circuit board 3 may be widened by a length corresponding to the thickness of the case 4, so that it is not wider than the conventional one.

In addition, the wiring of the lead wires 9a to 9e, which are the power supply line and the feed line, in the instrument body 10 having the plurality of discharge lamp ballasts 13 is neat, and misconnection can be prevented. Furthermore, since the feed line is wired in a direction orthogonal to the longitudinal direction of each lamp, it is possible to avoid noise from being superimposed on the feed line (power supply line) from each lamp due to high frequency induction.

A second embodiment of this invention is shown in FIGS. 5 and 6.
That is, in this electronic ballast, holes 14 are formed by notches between a pair of terminals 1 and 2 on both sides of the wide portion 7, and insulating feet 15 and lead wires inserted into the holes 14 are inserted. Department
The surface of the connecting portion of the lead wires 9a to 9e of the printed circuit board 3 is covered with the charging portion protection cover 16 of the molded product having 18. In this case, the insulating foot 15 also serves as insulation between each pair of terminals 1 and 2. The charging part protection cover 16 may be supported on the printed circuit board 3 by the insulating feet 15 or may be held by the case 4.

A third embodiment of the present invention is shown in FIGS. 7 to 16.
That is, this electronic ballast has three terminals (not shown) for connecting the two lead wires whose terminals 1 and 2 are power supply wires and one lead wire which is a dimming signal wire, respectively. At the edge of the wide portion 7 of the printed circuit board 3 which is configured, the recesses 19 are formed between the three terminals and on both sides by notches. On the other hand, lead wire insertion portions 18 corresponding to the three terminals are formed on the side plate of the charging portion protection cover 16, and the insulating legs 20 between them are passed through the recesses 19. Then, as shown in FIG. 12 and FIG. 13, a recess 21 is formed on the outer surface of the insulating foot 20 to be inserted inside the end surface 5 of the case 4, and locking claws are provided in the recesses 21 of the two inner insulating feet 20. The locking portion 22 according to the embodiment is formed, and the locking portion 22 is locked to the locking receiving portion 23 formed on the case 4 to fix the charging portion protection cover 16 to the case 4.

In addition, partition plates 24 and 25 for partitioning the terminals 1 and 2 into unit terminals are formed inside the filling portion protection cover 16 to ensure mutual insulation. Reference numeral 26 is a case lid attached to the case 4 by an engaging portion 26a formed by a claw, 27 is an output portion, and 28 is an attachment hole.

The terminals 1 and 2 of this invention are not limited to the female terminals.

[Effect of device]

According to the electronic ballast of the present invention, since the pattern wiring side of the wide end is supported by the notch of the case having a substantially U-shaped cross section,
Since the end of the notch of the case will be covered with the wide portion, the lead wire connected to the terminal on the side opposite to the pattern wiring side and extending in the wide direction of the wide portion does not contact the edge of the notch of the case, It is possible to secure insulation between the lead wire and the case without causing damage to the outer cover of the lead wire due to the notch and causing insulation failure with the case. Further, the printed circuit board is formed in a rectangular shape, and the wide portion thereof may be widened by a length corresponding to the thickness of the case. When electronic ballasts are arranged in parallel with multiple straight tube lamps, it is possible to connect the feed line to the terminals of the electronic ballast in a substantially straight line, which simplifies wiring and prevents misconnection. Since the straight tube lamp and the feed line can be orthogonalized, and the part where the straight tube lamp and the feed line are parallel can be minimized, it is possible to avoid noise superposition and also possible to design a thin block. There is an effect that.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a side view, FIG. 4 is a plan view of a luminaire, and FIG.
FIG. 6 is a side view of the second embodiment, FIG. 6 is its plan view, and FIG.
FIG. 7 is a front view of the third embodiment, FIG. 8 is a plan view, FIG. 9 is a bottom view, FIG. 10 is a left side view of FIG. 7, and FIG. 11 is a right side view of FIG. FIG. 12 is a front view of the charging section protection cover, FIG. 13 is its right side view, FIG. 14 is a left side view, and FIG. 15 is a plan view.
FIG. 16 is a bottom view, FIG. 17 is a plan view of a lighting fixture to which a conventional example is applied, FIG. 18 is a plan view of a conventional example, FIG. 19 is a plan view of another conventional example, and FIG. It is a figure. 1,2 …… Terminals, 3 …… Printed circuit boards, 4 …… Cases, 4
a '... notch, 5 ... one end, 6 ... pattern wiring side,
7 ... Wide part, 9a-9e ... Lead wire

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-54-134902 (JP, A) Actually opened 52-158851 (JP, U) Actually opened 60-153586 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A substantially rectangular parallelepiped electronic ballast, which is arranged in parallel with a plurality of straight tube lamps arranged side by side and has a feed line of an input line connected to be orthogonal to the straight tube lamp, wherein a wide portion is provided at one end. A rectangular printed circuit board having terminals on both sides of the wide portion, and an inner width that is substantially U-shaped in cross section and is wider than the lateral width of the printed circuit board and narrower than the width of the wide portion and that supports the wide portion. A case in which notches are formed on both side plates at one end, and both side edges of the wide portion are supported by the notches with the pattern wiring side of the printed circuit board facing the inner bottom surface of the case. An electronic ballast, wherein the electronic ballast is attached to the case.