JPH0426768B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high voltage capacitor mounting device used in flyback transformers and the like.

Conventional technology Most recent flyback transformers have a rectifier diode 2 and a high-voltage capacitor 3 connected to the output side of the transformer 1, as shown in Figure 6, to reduce image distortion due to screen load fluctuations. . That is, it is intended to eliminate image distortion by storing high voltage in the high voltage capacitor 3, increasing the rectification effect, and reducing ripple voltage.

The specific structure of such a flyback transformer is shown in FIGS. 7 and 8, in which a low voltage bobbin 5 around which a low voltage coil 4 is wound is combined with a high voltage bobbin 7 around which a high voltage coil 6 is wound. A magnetic core is incorporated into this to form a transformer 1, an insulating plate 8 is attached to one side of this transformer 1, a high voltage capacitor 3 made of a film capacitor is attached to the outer side of this insulating plate 8, and a lead wire 9 of this high voltage capacitor 3 is attached. ,1
0 was connected to the high voltage lead 11 of the transformer 1 and also to the terminal 12 of the low voltage bobbin 5. The leads 9 and 10 were hooked onto protrusions 13 provided at the upper and lower ends of the insulating plate 8 and connected to the high voltage leads 11 and terminals 12.

Problems to be Solved by the Invention In the above configuration, the mounting position of the high voltage capacitor 3 is easily misaligned, and the high voltage capacitor 3 made of a film capacitor has a high voltage at the center and a ground side at the outer periphery. If the wire 9 is routed without maintaining a sufficient creepage distance a between it and the ground side on the outer periphery, creepage leakage will occur, and if the lead wire 10 on the ground side is also routed toward the center, creepage leakage will likely occur. There was a problem in which the quality became extremely unstable.

The present invention has been made to eliminate the above-mentioned conventional drawbacks, and aims to provide a high-voltage capacitor mounting device that securely holds the high-voltage capacitor and does not cause creepage leakage in the routing of lead wires. It is something to do.

Means for Solving the Problems In order to solve the above problems, the present invention provides a bottom plate having several holding pieces for elastically holding the outer peripheral surface of a high-voltage capacitor and a projection on the bottom surface for hooking a lead wire. A lead wire hooking plate is provided on the top of the holder with a protrusion or notch that protrudes above the upper end surface of the high voltage capacitor held by the holder and has a protrusion or notch on the upper end surface for hooking the lead wire. be.

Effects With the above configuration, the high voltage capacitor can be held reliably, the lead wires can be routed reliably, insulation can be ensured, and the device can be highly reliable.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 to 4, 14 is a holder made of synthetic resin, and this holder 14 has a plurality of holding pieces 16a to 16f that hold the outer peripheral surface of a high voltage capacitor 15 made of a film capacitor.
It has a structure with a bottom plate 17 at the lower end, and this high plate 1
Protrusions 19 and 20 are provided on the lower surface of the high-voltage capacitor 15 for hooking a ground-side lead wire 18 drawn out from the lower end surface of the high-voltage capacitor 15.

Furthermore, a lead wire hooking plate 22 is integrally provided at the upper end of one side of the holder 14 to hook a high voltage side lead wire 21 that protrudes upward from the upper surface of the high voltage capacitor 15 attached to the holder 14. A protrusion 23 for hooking the lead wire 21 is provided at the upper end of the hook plate 22.

Furthermore, a lead wire guide piece 24 having an L-shaped cross section is provided on the opposite surface of the lead wire hooking plate 22 from the mounting surface of the high voltage capacitor 15 so as to protrude outward. Also provided is a lead wire hooking protrusion 25 for hooking the lead wire 21, and a guide protrusion 26 for preventing the lead wire from falling off.

Note that the lead wire hooking plate 22 may be provided with a protrusion 23 or a notch 23a for hooking the lead wire 21, as shown in FIGS. 4a and 4b.

With such a configuration, lead wires 18 and 21 are connected at both ends.
The high-voltage capacitor 15 is held between the holding pieces 16a to 16f of the holder 14 by the elasticity of the holding pieces 16a to 16f. At this time, the lower end of the high voltage capacitor 15 is held in a state slightly raised above the bottom plate 17, and the ground side lead wire 18 drawn out from the lower end surface of the high voltage capacitor 15 is hooked onto the protrusion 19 from the side surface of the bottom plate 17. A high-voltage side lead wire 2 is wound around a protrusion 20 at the center of the bottom of the bottom plate 17 and drawn out, and is drawn out from the upper end surface of the high-voltage capacitor 15.
1 is hooked onto the protrusion 23 of the lead wire hooking plate 22 and fixed so as to maintain a sufficient distance from the peripheral edge of the high voltage capacitor 15, and is drawn out along the lead wire guide piece 24.

A case in which such a high voltage capacitor mounting device is used in a flyback transformer will be explained with reference to FIG.

A low voltage bobbin 28 around which a low voltage coil 27 is wound,
A transformer 31 is constructed by combining a high voltage bobbin 30 around which a high voltage coil 29 is wound and incorporating a magnetic core therein.
A high voltage lead 33 is connected to the rectifier diode 32 connected to the high voltage side of the high voltage lead 33, the tip of the lead wire guide piece 24 is connected to the extraction side of the high voltage lead 33, and the tip of the lead wire 21 of the high voltage capacitor 15 is connected to the high voltage lead 33. Connect to the connected rectifier diode 32,
The ground-side lead wire 18 of the high-voltage capacitor 15 is connected to a terminal 34 provided on the low-voltage bobbin 28 for use.

With this configuration, a sufficient creepage distance between the lead wires 18 and 21 of the high voltage capacitor 15 and the high voltage side or the ground side can be maintained, and the reliability can be significantly improved.

In the above embodiments, a flyback transformer has been described as its application, but it can also be similarly used in electronic equipment using high-voltage capacitors, such as a power supply for a copying machine, a power supply for a projector, and the like.

Effects of the Invention As described above, the high-voltage capacitor mounting device of the present invention elastically holds the high-voltage capacitor with several holding pieces, so the mounting position is stable, and the lead wires are attached to the lead wire hooking plate or the bottom plate. It is possible to accurately maintain a sufficient insulation distance between a part with a large potential difference by hooking it on a protrusion, preventing creepage leakage, and greatly improving reliability and ease of assembly. It has the advantage of being able to improve productivity and improve productivity, and is of great industrial value.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the high-voltage capacitor mounting device of the present invention, Fig. 2 is a top view of the same, Fig. 3 is a bottom view of the same, and Fig. 4 a and b are lead wire hooks of the mounting device. Fig. 5 is a front view of the same high voltage capacitor mounting device applied to a flyback transformer, Fig. 6 is an electrical circuit diagram of a general flyback transformer, and Fig. 7 is a side view showing an example of the plate part. FIG. 8 is a front view of the flyback transformer, and FIG. 8 is a side view of the high voltage capacitor mounting portion of the flyback transformer. 14...Holder, 15...High voltage capacitor,
16a-16f...Holding piece, 17...Bottom plate, 18
...Lead wire, 19, 20...Protrusion, 21...Lead wire, 22...Lead wire hooking plate, 23...Protrusion, 24...Lead wire guide piece, 25...Lead wire hooking protrusion, 26 ...Guide protrusion.

Claims (1)

[Claims] 1 The high-voltage capacitor is held on top of a holder that has several holding pieces that elastically hold the outer circumferential surface of the high-voltage capacitor, and a bottom plate with a protrusion on the bottom for hooking the lead wire pulled out from the bottom of the high-voltage capacitor. protrudes upward from the upper end surface of the high voltage capacitor,
A high-voltage capacitor mounting device comprising a lead wire hooking plate having a protrusion or notch on its upper end surface for hooking the lead wire pulled out from the top surface of the high-voltage capacitor.