JPS6233209Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a dimmer for discharge lamps, and simplifies the fixing structure of the chassis housed in the case.
The purpose is to improve workability when connecting with external circuits.

Some discharge lamp dimmers have a chassis with electrical components for the dimmer circuit installed inside the case, but when this chassis is fixed inside the case,
Conventionally, the chassis was fixed to the case with screws or the like, which required a separate fixing structure for the chassis.
Furthermore, when connecting the dimmer circuit inside the case to an external circuit, it is normal to remove the chassis and make the connection, and after that connection, it is necessary to fit the chassis into the case, which has the disadvantage of lacking workability. It was hot.

The present invention is designed to solve these conventional problems, and its features are as follows:
A chassis with a U-shaped cross section to which electrical components for a dimming circuit are attached is stored in a case, and a back cover is attached to the opening side of the case so as to hug the chassis between it and the case, on the side wall of the chassis;
The present invention is characterized in that a bent part is formed which is bent inward, a terminal block is attached to this bent part, and a cutout part is provided in the case opposite to this terminal block.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 shows a dimmer circuit for a discharge lamp, and this dimmer circuit 1 includes a stationary yoke 2, a control element 3 such as a triax, a variable resistor 4, an SBS, etc. It consists of a trigger element 5 and a capacitor 6, and is interposed between an AC power source 7 and a discharge lamp 8. 9 is a switch, and 10 is a glow switch. Note that this dimming circuit 1 may be connected as shown in FIG. Reference numeral 11 is a noise prevention chiyoke.

3 to 6 show a dimmer incorporating the dimmer circuit 1 described above. In the figure, reference numeral 12 denotes a chassis, which is made by bending a conductive metal plate into a U-shaped cross section. A terminal block 15 is attached to each bent portion 14, and a printed circuit board 16 is attached to each bent portion 14. That is, as shown in FIG. 7, screw holes 17 are formed at both longitudinal ends of the bent portion 14, and the terminal block 15 is fixed by screws 18 that are screwed into the screw holes 17. Further, each screw 18 protrudes through the bent portion 14, and the printed circuit board 16 is attached to the protruding portion side via a spacer 19 and a nut 20 that are fitted or screwed together. It is supported across a pair of bent portions 14. The trigger element 5, capacitor 6, etc. of the dimming circuit 1 are attached to the printed circuit board 16, and the control element 3 and variable resistor 4 are attached to the inner surface of the top plate 21 of the chassis 12. The variable resistor 4 is fixed to a mounting bracket 22, and the mounting bracket 22 has a protrusion 24 that engages with a hole 23 in the top plate 21.
It is fixed to the chassis 12 by screws 26 screwed into screw holes 25. 27 is Chiyok 2 2
The yoke portion 27 is a divided yoke portion, which is formed by winding a coil 29 around an iron core 28 and storing it in a case 30. The yoke portion 27 is fixed to the side plate 13 of the chassis 12 with screws 31, and a ventilation passage 32 for convection is formed between the two yoke portions 27.

A case 33 has an opening on one side and is made of a suitable material such as a conductive material or an insulating material.
A chassis 12 is built into the chassis 3. Case 3
3, a notch 34 facing the terminal block 15 on the chassis 12 side is formed extending from the top plate 35 to each side plate 36, and a large number of ventilation holes 38 are formed in the side plates 37 at both ends in the longitudinal direction. . Also case 3
In the left and right side plates 36 of 3, engagement holes 39 are formed in pairs near the opening edges, respectively, and engagement claws 41 of the fixture 40 engage with each engagement hole 39. There are four fixtures 40, and each fixture 40 is fixed to a mounting member 43 with a screw 42.
Reference numeral 44 denotes a back cover, which has reinforcing bent edges 45 at both ends in the width direction, and is configured to be narrower than the opening of the case 33 so as not to interfere with the engaging claws 41 of the fixture 40. Attachment parts 47 having screw holes 46 are provided at both upper and lower ends of the back cover 44, and the back cover 44 is attached to the side plate 37 of the case 33 by screws 48 that are screwed into the screw holes 46 of the attachment parts 47. Ori,
The top plate 35 of the case 33 comes into contact with the top plate 27 of the case 33.
The chassis 12 is clamped and fixed between the sides. Note that a notch 50 is formed in each side plate 13 of the chassis 12, leaving a protrusion 49 so that the end edge thereof does not interfere with the engaging pawl 41. Reference numerals 51 and 52 are operation holes formed opposite to the rotating shaft 53 of the variable resistor 4.

In the above configuration, during assembly, the chassis 12
After attaching each electrical component to the case 33, insert the chassis 12 into the case 33, set the back cover 44 on the opening side, and screw the screws 48 into the screw holes 46 of the mounting parts 47 at both ends. Then, the back cover 44 is fixed to the pair of side plates 37 of the case 33. At this time,
Since the back cover 44 is in contact with the pair of yoke parts 27 of the yoke 2, the chassis 12 is held between it and the top plate 35 of the case 33, and the chassis 12 is fixed at the same time as the back cover 44 is attached. can.

Furthermore, when attaching the terminal block 15 and the printed circuit board 16 to the bent portion 14 of the chassis 12,
The terminal block 15 is set on the terminal block 4, and the screw 18 inserted therein is screwed into the screw hole 17 of the bent part 14 and fixed. Next, after fitting the spacer 19 onto the protruding portion side of the screw 18 and setting the printed circuit board 16, screw the nuts 20 onto each screw 18 to attach the printed circuit board 1.
Fix 6. Therefore, the terminal block 15 and the printed circuit board 16 can be fastened together to the bent portion 14 with the screws 18, and moreover, they can be fixed in sequence.

When attaching the case 33 incorporating the chassis 12 etc. to the mounting member 43, insert the engaging claw 41 of the mounting tool 40 into the engagement hole 39, and fix each mounting tool 40 to the mounting member 43 with the screw 42. do. In this way, the case 33 is pressed and fixed to the mounting member 43 via the mounting tool 40, and therefore, the case 33 can be easily mounted even though the mounting portion is not bent.

When connecting a lead wire of an external circuit to each terminal fitting of the terminal block 15, it is sufficient to insert the lead wire through the notch 34 of the case 33 and connect it to the terminal fitting in that state. There is no need to remove the chassis 12 from the chassis. After connection, case 3
A protective cover may be attached to the notch 34 of No. 3.

Note that the back cover 44 not only presses the front yoke portion 27, but also has a raised claw 53 facing the bent edge 45 as shown in FIG. The yoke portion 27 may be gripped and held by the operator. The yoke 2 does not necessarily have to be divided into two yokes 27, and one large yoke may be incorporated.

According to the present invention, since the chassis housed in the case is held between the case back and the case back, the chassis can be fixed by fixing the back cover, and a fixing structure for the chassis is not required and can be simplified. In addition, a bent part is provided on the chassis to attach the terminal block, and a notch is formed in the case opposite to this terminal block, so when connecting to an external circuit, the terminal block can be connected from the notch, and the case can be opened. There is no need to remove it, and workability is good.

[Brief explanation of the drawing]

1 and 2 are circuit diagrams showing an embodiment of the present invention, FIG. 3 is an exploded perspective view of the main parts, FIG. 4 is a cross-sectional side view, and FIG. 6 is a view taken along the - arrow in FIG. 4, FIG. 7 is an enlarged view of the same essential parts, and FIG. 8 is a sectional view showing a modification. DESCRIPTION OF SYMBOLS 1...Dimmer circuit, 2...Chiyoke, 3...Control element, 4...Variable resistor, 5...Trigger element, 1
2... Chassis, 14... Bent part, 15... Terminal block, 16... Printed circuit board, 27... Chiyoke part, 33... Case, 34... Notch, 38...
Ventilation hole, 39... Engagement hole, 40... Mounting tool, 43
...Mounting member, 44...Back cover.

Claims (1)

[Scope of utility model registration request] A chassis with a U-shaped cross section to which electrical components for a dimming circuit are attached is stored in a case, and a back cover is attached to the opening side of the case so as to hug the chassis between it and the case, A bent part bent inward is formed on the side wall of the chassis, a terminal block is attached to the bent part, and a cutout part is provided in the case opposite to the terminal block. Dimmer for discharge lamps.