JP2730428B2 - High voltage generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high voltage generator for supplying a high voltage to an anode electrode of a cathode ray tube of a television receiver or a display device.

[0002]

2. Description of the Related Art A conventional high voltage generator is shown in FIGS.
As shown in FIG. 7, the low voltage coil 3 in which the primary coil 2 is wound around the low voltage bobbin 1 and the high voltage coil 6 in which the secondary coil 5 is wound around the high voltage bobbin 4 in at least three layers are fitted. The secondary coil 5 is provided at both ends of the high-pressure bobbin 4.
17a is connected to a terminal 4b embedded in the terminal 4a, and a high voltage diode 7, a resistor 8 and a high voltage diode 7 are connected to the terminal 4b.
It is configured by connecting in series like the circuits of (a) and (b).

[0003] Inside the high-voltage coil 6, there is provided an engagement stop 4d in which at least one of the plurality of divided flanges 1a of the low-voltage coil 3 is engaged with a convex rib 1b. The low-voltage coil 3 is fitted inside.

A high voltage lead wire 10 is connected to the input lead 15a of the focus block 15 connected to the last end of the high voltage diode 7 and the high voltage diode 7 at the last end. A resistor 8 or a high-voltage diode 7 is connected to one end of the first layer of the secondary coil 5, and is wired by a jumper wire 14 to a terminal 1 c planted on a flange of the low-voltage bobbin 1.

These are housed in an insulating case 9, and an epoxy resin 19 is injected into the insulating case 9 and hardened to be insulated. That is, at the time of assembling, the high voltage diode 7 is soldered to the terminals at both ends of the wound high voltage coil 6, the low voltage coil 3 is fitted thereto, and the final end of the high voltage diode 7 attached to the high voltage coil 6 is The bushing 11 and the high-voltage lead wire 10 inserted into the insulating case 9 are entangled and soldered and housed in the insulating case 9, and the bushing 11 is fitted to the lead outlet 9 e of the insulating case 9. Further, the input lead 15a of the focus block 15 which is processed into a U-shaped tip is connected to the lead wire 7 of the high voltage diode 7 at the final end.
The focus block 15 is fitted into the concave groove 9a around the opening of the insulating case 9.

Here, the depth of the concave groove 9a is adjusted to the length of the fitting rib 15b of the insulating case of the focus block 15. Further, in order to prevent leakage at the time of vacuum injection of the epoxy resin 19, a leakage preventing agent 20 is applied to the periphery of the fitting portion of the focus block 15.

[0007] If the application of the leak preventing agent 20 is incomplete, there is a problem in that the appearance of the epoxy resin 19 oozes out from the fitting portion, resulting in poor appearance. Then, the magnetic core 12 is assembled, and the magnetic core 12 is fixed by the fastening fitting 13, thereby forming a high voltage generator.

[0008]

In the configuration of the high-voltage generator as described above, poor lead-out of the lead wire makes contact with the inner wall of the insulating case 9 resulting in poor dielectric breakdown. It is difficult to assemble, lacks certainty,
There is a problem that the quality is not stable and the cost is not reduced, for example, the appearance defect occurs due to leakage of the insulating resin such as the epoxy resin 19.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and enables assembly by unit fitting, improves the workability of assembly, achieves high quality with high stability, and enables introduction of automation to reduce the cost. An object is to provide a high quality high voltage generator.

[0010]

In order to achieve the above object, the present invention provides an insulating case having an open end face, a coil unit contained in the insulating case, and a holding unit engaging with the coil unit. A focus block having a fitting end face fitted to an open end face of the insulating case, and an insulating resin filling the insulating case fitted to the focus block, wherein the insulating case is provided with a through hole. A high-voltage lead wire is inserted into the insulating case, and the coil unit winds the high-voltage coil and winds a high-pressure bobbin having a hollow hole and a low-voltage coil fitted into the hollow hole of the high-pressure bobbin. A low-pressure bobbin; the holding component unit includes a holding molded product; and a terminal fitting mounted on the holding molded product. Has an input terminal of the block, the terminal fitting of the holding arrangement unit has an input terminal and thereby the gas connection conductive connection portion and the focus block terminal and the high voltage lead of the high-pressure bobbin, before
The input terminals of the focus block are electrically conductive rubber
And electrically connected.

[0011]

According to this configuration, no jumper wire is required, no soldering of the input lead of the focus block is performed, the high voltage lead wire and the input lead of the focus block are regulated, and a dielectric breakdown failure due to contact with the inner wall of the insulating case is eliminated. In addition, it is possible to improve the assembling workability, stabilize the quality, and introduce automatic assembly.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. A low-voltage coil 3 and a high-voltage coil 6 having the same configuration as in the related art, and a lead wire of a high-voltage diode 7 or a resistor 8 connected to one end of the first layer of the secondary coil 5 is directly connected to a low-voltage terminal 1c. Thus, the coil unit 27 is configured.

As shown in FIG. 2, a high-voltage lead wire 10, a conductive rubber 18, and a terminal fitting 17 are engaged and connected to the holding molded product 16. As shown in FIGS. 4A to 4C, the terminal fitting 17 is inserted into the groove 16b of the holding molded product 16, and the engaging piece 17a of the terminal fitting 17 is engaged with the engaging hole 16g of the groove 16b. It is held by the holding molded product 16. Further, the conductive rubber 18 is press-fitted into a sharp piece 17b having a sharp end at one end of the terminal fitting 17. Here, the conductive rubber 18 is held on the holding molded product 16 by the cylindrical wall 16 c where the conductive rubber 18 is regulated and the terminal fitting 17.

The high-voltage lead wire 10 is inserted into a semicircular groove 16a as shown in FIG.
Constitute the holding unit 28 engaged and fixed.

The connection of the high-voltage lead wire 10 is performed by using terminal fittings 17.
Is soldered to the high-voltage lead connection portion 17d at the other end.
Incidentally, transmural high pressure lead 10 from the pre-insulated casing 9
It passes through the through hole and the bushing 11.

As shown in FIGS. 3A and 3B, a fitting hole 16d of the holding unit 28 is fitted to a fitting projection 4c of the high-pressure bobbin 4 of the coil unit 27, and is held and fixed by an engaging rib 16e. Is done. Coil unit 27 and holding unit 2
Reference numeral 8 indicates that the coil connection piece 17c of the terminal fitting 17 is soldered to the terminal 4b of the high voltage coil 6.

Furthermore, the fitting product of the coil unit 27 and the holding unit 28 is placed in the insulating case 9, and the focus block 15 is used to fit the focus block of the insulating case 9 as shown in FIGS. 5 (a) and 5 (b). In the U-shaped groove 9b, and is fixed by an engaging piece 9d in the U-shaped groove 9b, thereby preventing detachment or floating. Here, the focus block 15
The tip of one end of the input terminal 21 is sharply formed, and the input terminal 21 is press-fitted into the conductive rubber 18 to make an electrical connection.

A magnetic core (ferrite core) 12 is incorporated in the low-voltage coil 3, and a clamp 13 is assembled to a magnetic core leg opposite to the coil side to fix the magnetic core 12. A magnetic gap 22 is provided at both magnetic core legs of the magnetic core 12 or at the butting portion of the magnetic core legs in the coil.

According to the unit fitting assembly having the above structure, since the wiring is not routed at the time of assembling, the insulation distance is reliably ensured, the routing is poor, there is no insulation breakdown, and the assembling workability is improved. Automation is easy.

FIGS. 6A and 6B show the high-voltage lead connection portion 1 of the terminal fitting 17 engaged with the holding molded product 16.
7d is made to have elasticity, and the high-voltage lead wire 10 is held and molded.
6 is inserted into the semicircular groove 16a.
The high-voltage lead connection portion 17d is configured so as to be pressed against the soldering lead portion 10a at the tip of the terminal by the elasticity of the high-voltage lead connection portion 17d of the elastic body of the terminal fitting 17. The high-voltage lead connecting portion 17d is provided with a semicircular groove 17e having a diameter slightly larger than the diameter of the soldering lead portion 10a at the tip of the high-voltage lead wire 10, and a high-pressure groove 17e is provided in the semicircular groove 17e. Since the soldering lead portion 10a at the tip of the lead wire 10 is soldered in a press-contact state, the soldering is performed reliably. In addition, since the holding molded product 16 is provided with the regulating wall 16h, the inner wall of the insulating case 9 and the insulating distance 25h are surely provided.
And a high-voltage generating apparatus free from insulation failure is constructed, thereby improving quality.

In the embodiment shown in FIGS. 7A and 7B, the connection between the coil unit 27 and the holding unit 28 is performed by the terminal fitting 17.
The elastic coil connection piece 17c has elasticity so that the terminal 4b of the high voltage bobbin 4 presses the lead wire 7a of the high voltage diode 7, and escape of the lead wire 7a of the diode 7 due to heat during soldering. It is configured to prevent and securely connect.

In the embodiment shown in FIG. 8, a reinforcing projection 16i is provided on the holding molding 16 and the focus block 1 is attached to the conductive rubber 18.
5 when the input terminal 21 connected to the input terminal 21 is inserted.
, The input terminal 21 is inserted into the conductive rubber 18 by a specified dimension, the gap between the insulating case 9 and the holding molded product 16 is maintained, and the insulation distance 25 is reliably maintained.

The embodiments of FIGS. 9 and 10 (a) to 10 (c)
The input terminal 21 of the focus block 15 is connected to one end of the bleeder resistor 23.

The input terminal 21 is inserted into a concave rib 24 a of a groove larger than the diameter of the input terminal 21 on the back surface of the holder 24 of the bleeder resistor 23, and one end of the input terminal 21 is connected to the other end of the bleeder resistor 23. Here, the input terminal 21
The groove is bent so as to prevent rotation, and the concave groove is similarly configured.

The holder 24 is also provided with an engaging rib 24b provided with a slit 24c smaller than the diameter of the input terminal 21 so that the input terminal 21 can be temporarily fixedly engaged.
The bottom of 4b is slightly larger than the diameter of the input terminal 21. Also, in order to facilitate the insertion of the input terminal 21,
A rib gap 24d is provided to provide a gap for the insertion jig.

Further, the rib between the bent portion 21b on the conductive rubber insertion side of the input terminal 21 and the concave groove 24a is released without providing a rib within 1 mm, and the input terminal 21 is provided with a clearance in the concave groove 24a so that the input terminal 21 has a clearance. 21 has a degree of freedom. Therefore, even if there is an assembly variation when the terminal tip is inserted into the conductive rubber 18, the terminal is reliably guided and inserted into the conductive rubber 18 within the degree of freedom of the input terminal 21.

Note that the rotation of the input terminal 21 is prevented as shown in FIG.
It goes without saying that the same effects can be obtained by the processing of (a) and (b).

In the embodiment shown in FIGS. 12A and 12B, a protective wall 24e longer than the sharp tip 21a of the input terminal 21 for protecting the sharp tip 21a of the input terminal 21 of the focus block 15 is provided. The safety measures such as the bending of the input terminal 21 and the sticking of the hand during work are taken into consideration.

The embodiment shown in FIG.
A U-shaped groove 9b deeper than the fitting rib 15b at the outer peripheral end of the fitting end face 5 is provided on the outer peripheral end of the open end face for fitting the focus block of the insulating case 9, and the insulating case 9 is fitted to the focus block 15. A gap of 1 mm or more is provided between the end face of the fitting rib 15b and the bottom of the U-shaped groove 9b. Note that the U-shaped groove width is set to be the same as or slightly smaller than the width of the fitting rib 15b of the focus block 15, and the focus block 15 and the insulating case 9 are strongly fitted to prevent leakage of the epoxy resin 19.

If the gap is less than 1 mm, the fitting is too strong and the workability of the fitting is poor. In addition, the pinch by the U-shaped groove 9b hits the corner of the end face of the fitting rib 15b of the focus block 15, resulting in point contact, and leakage of the epoxy resin 19 occurs. Therefore, the fitting portion is configured so that a wide contact can be obtained on the wall surface.

Further, as shown in FIG. 14, the outer wall 9c of the U-shaped groove 9b of the insulating case 9 which sandwiches the fitting rib 15b is formed to be at least twice as long as the fitting rib 15b.
In addition, at the time of initial fitting in which the focus block 15 is fitted to the insulating case 9, the focus block 15 is configured to have a gap 26 between the conductive rubber 18 and the sharp tip 21 a of the input terminal 21.

In order to firmly sandwich the fitting rib 15b of the focus block 15 by the hinge effect of the U-shaped groove 9b,
The focus block 15 is tightly fitted to the insulating case 9 so as to prevent the epoxy resin 19 from leaking without applying the leak preventing agent 20 of the epoxy resin 19. When the focus block 15 is fitted into the insulating case 9, the outer wall 9c of the U-shaped groove 9b serves as a guide wall, and the input terminal 21 is smoothly inserted into the conductive rubber 18. Therefore, when the focus block 15 is placed in the outer wall of the U-shaped groove 9b at the opening of the insulating case 9 and pressed into the fitting portion, the input terminal 21 is automatically inserted into the conductive rubber 18, so that the assembly can be automated. Easy.

The worst case of leakage of epoxy resin is that the outer wall 9c of the U-shaped groove 9b is
5 is longer than the fitting rib 15b, the leakage of the epoxy resin 19 stops in the wall 9c, and the appearance does not deteriorate.

[0034]

As described above, according to the structure of the present invention, dielectric breakdown due to poor wiring due to conventional work, deterioration of workability due to soldering of leads, and application of a leak-proof agent of epoxy resin. This makes it possible to introduce a high-voltage generator with stable quality and good workability without epoxy resin leakage due to imperfections, and to be able to introduce automatic assembly.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a high voltage generator according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the holding unit.

FIG. 3A is an explanatory view showing the fitting between the coil unit and the holding unit. FIG. 3B is a cross-sectional view of a fitting portion between the coil unit and the holding unit.

FIG. 4A is a front view showing an engagement portion to be attached to the holding unit. FIG. 4B is a plan view showing a state where lead wires of the holding unit are engaged. FIG. Figure

FIG. 5A is an exploded perspective view showing the fitting of the focus block. FIG. 5B is a cross-sectional view showing the fitting of the focus block.

FIG. 6A is an explanatory diagram illustrating a lead wire soldering portion of the terminal fitting. FIG. 6B is an explanatory diagram illustrating a relationship between a lead wire soldering portion of the terminal fitting and an insulating case.

FIG. 7A is a perspective view showing the connection between the terminal fitting and the coil. FIG. 7B is a side view showing the connection between the terminal fitting and the coil.

FIG. 8 is an explanatory view showing a reinforcing protrusion of the holding unit.

FIG. 9 is a perspective view of the focus block.

10A is a configuration diagram of the folder and the input terminal. FIG. 10B is a side view showing an engagement state of the holder and the input terminal. FIG. 10C is a cross-sectional view of the holder when the input terminal is engaged.

11A is an explanatory view showing processing of the input terminal. FIG. 11B is an explanatory view showing processing of an input terminal of another embodiment.

12A is a side view of the same focus block. FIG. 12B is a perspective view of the same focus block.

FIG. 13 is a sectional view of a fitting portion between the focus block and an insulating case.

FIG. 14 is a sectional view of the focus block and an insulating case at the time of initial fitting.

FIG. 15 is a sectional view of a conventional high voltage generator.

FIG. 16 is an enlarged sectional view of a main part of a conventional high voltage generator.

17A and 17B are circuit diagrams of a conventional high voltage generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-voltage bobbin 1a Dividing flange 1b Convex rib 2 Primary coil 3 Low-voltage coil 4 High-voltage bobbin 4a Terminal flange 4b Terminal 4c Fitting protrusion 4d Non-engagement stop 5 Secondary coil 6 High-voltage coil 7 High-voltage diode 7a Lead wire 8 Resistance 9 Insulation case 9a concave groove 9b U-shaped groove 9c U-groove outer wall 9d engaging piece 9e lead outlet 10 high-voltage lead wire 10a high-voltage lead soldering section 11 bushing 12 magnetic core 13 fastening fitting 14 jumper wire 15 focus block 15a input lead 15b fitting Mating rib 16 Holding molded product 16a Semicircular groove 16b Groove 16c Cylindrical wall 16d Fitting hole 16e Engaging rib 16f Lead engaging piece 16g Engaging hole 16h Restriction wall 16i Reinforcement protrusion 17 Terminal fitting 17a Engagement piece 17b Sharp piece 17c Coil connection piece 17d Lead wire soldering part 17e Semicircular groove 18 Electrorubber 19 Epoxy resin 20 Leak preventer 21 Input terminal of focus block 21a Sharp tip 21b Bending portion of conductive rubber insertion side 22 Magnetic gap 23 Bleeder resistance 24 Holder 24a Concave rib 24b Engagement rib 24c Slit 24d Rib gap 25 Insulation distance 26 gap between conductive rubber and input terminal tip 27 coil unit 28 holding unit

Claims (5)

(57) [Claims] 1. An insulating case having an open end face, a coil unit included in the insulating case, a holding component unit engaged with the coil unit, and a fitting end face fitted to the open end face of the insulating case. Having a focus block, and an insulating resin filling the insulating case fitted with the focus block, wherein the insulating case is
A high-voltage lead wire is inserted into the insulating case by providing a through-hole, and the coil unit winds a high-voltage coil, and a high-pressure bobbin having a hollow hole and a low-pressure bobbin fitted into the hollow hole of the high-pressure bobbin. A low-pressure bobbin for winding a coil, the holding component unit includes a holding molded product, and a terminal fitting attached to the holding molded product, and the focus block includes an input terminal of the focus block. The terminal fitting of the holding component unit is electrically connected to a terminal of the high-voltage bobbin, a connection portion of the high-voltage lead wire, and an input terminal of the focus block, and the input terminal of the focus block is electrically conductive. High-voltage generator electrically connected via rubber. 2. The input terminal of the focus block has one end formed with a sharp piece, and the terminal fitting also has one end formed with a sharp piece.
A cylindrical wall is provided around the sharp piece of the terminal fitting, and the focus block is provided with a protective wall for protecting the sharp piece of the input terminal around the sharp piece of the input terminal of the focus block, 2. The height according to claim 1, wherein the sharp piece at one end of the terminal fitting and the sharp piece at the input terminal of the focus block are pierced into a conductive rubber for electrical connection, and the conductive rubber is inserted into the cylindrical wall. Voltage generator. 3. The terminal fitting has one end electrically connected to an input terminal of the focus block and the other end electrically connected to a connection portion of a high-voltage lead wire. The other end of the terminal fitting is connected to an elastic body. And a groove is provided at the other end,
2. The high voltage generator according to claim 1, wherein a side surface of a connecting portion of the high voltage lead wire is elastically pressed against the groove of the terminal fitting. 4. A diode for electrically connecting to a terminal of the high-voltage bobbin is provided, and a coil unit connecting a connection portion of the diode and a terminal of the high-voltage bobbin is provided, and an elastic body is connected to a terminal fitting of the holding component unit. A connection piece of the terminal fitting, the diode and the terminal of the high-voltage bobbin are electrically connected, and the connection piece of the terminal fitting elastically presses the diode to the terminal of the high-pressure bobbin. The high voltage generator according to claim 1. 5. The insulating case is provided with a U-shaped groove at an outer peripheral end of an open end surface thereof. The focus block is provided with a fitting rib at an outer peripheral end of the fitting end surface thereof. The fitting rib of the block is inserted, and the fitting rib is sandwiched by the U-shaped groove.
2. The high voltage generator according to claim 1, wherein the depth of the groove is greater than the insertion length of the fitting rib.