JPH08316U - High voltage resistor pack - Google Patents

Abstract

(57) [Abstract] [Purpose] To form a lead wire connecting portion that has high connection strength, is easy to manufacture, and has high reliability even with high voltage. [Structure] A circuit board and a variable resistor are provided in an insulating resin case 10. A lead wire holding member 20 in which a slit 22 is formed in a polygonal metal plate is provided on a side lead wire fixing portion 18 in the resin case 10, and the lead wire holding member 20 is connected to a circuit board 28. Are integrally formed. Lead wire fixing part 1 in the resin case 10
The lead wire holding member 20 is fixed to 8, and the tip end portion 26 of the lead wire 24 having an outer diameter larger than the gap of the slit 22 is inserted into the slit 22, and the peripheral edge of the slit of the metal plate is slightly bent in the insertion direction. , The inserted lead wire 2
The divided pieces 36 to 39 of the lead wire holding member 20 are elastically pressed against the side surface of the distal end portion 26 of No. 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high-voltage resistance pack in which a high-voltage resistor such as a CRT (Cathode-ray tube) bleeder resistor is housed in an insulating case.

[0002]

[Prior art]

 Conventionally, in a high-voltage resistor pack that has a built-in variable resistor for adjusting the focus voltage of a CRT, a ceramic circuit board with resistors printed is housed in an insulating resin case such as Noryl resin. The slider of the variable resistor is slidably provided on the resistor on the circuit board. Since a high voltage is applied to the lead wire connected to this high voltage resistance pack, as shown in FIG. 6, the tip portion 2 of the lead wire 1 and the connection protruding from the insulating resin 7 provided on the circuit board 3 are connected. In order to securely solder the terminal 4 to the terminal 4, the tip portion 2 of the lead wire 1 was inserted through the through hole 5 of the terminal 4, and the tip portion 2 was covered and fixed with the clip 6.

Further, as disclosed in Japanese Utility Model Laid-Open No. 64-48875 and Japanese Utility Model Laid-Open No. 1-155670, when the lead wire and the terminal connecting portion are electrically connected, the lead wire and the like are connected to a metal plate. There are also those that are sandwiched and connected by a spring. In this case, the portion that holds the lead wire, etc. is held by the antinode portion of the spring member.

[0004]

[Problems to be solved by the device]

 In the case of the above-mentioned conventional soldering, there is a problem that it takes a lot of man-hours for soldering and causes defective soldering, which hinders cost reduction. In addition, in the case of the one disclosed in the above publication, the lead wire is held only by the elastic force of the antinode portion of the spring member, which has the drawback that the holding force is weak and the lead wire is easily pulled out by pulling. is there. Moreover, since the contact pressure is weak, the reliability of electrical connection is low, and it cannot be used for a lead wire to which a high voltage is applied. In addition, the shape is complicated and the cost of parts increases.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and has a high-voltage resistance pack having a lead wire connection portion having high connection strength and high reliability against high voltage. The purpose is to provide.

[0006]

[Means for Solving the Problems]

 In this invention, a lead wire holding member having a slit formed on a predetermined metal plate is provided, and a lead wire having an outer shape thicker than the gap of the slit is inserted into the slit, and the peripheral portion of the metal plate on which the slit is formed is inserted. Is a high-voltage resistance pack formed by bending in the insertion direction and pressing the tip of the inserted lead wire.

Further, in the present invention, the slits are formed in a radial shape, the side portions of the metal plate in which the slits are formed are bent to form a box-shaped portion, and the tip portion of the lead wire is solidified to form the slit portion. It is a high-voltage resistor pack that is inserted in the central part and is surrounded by the box-shaped part.

[0008]

[Action]

 In the high voltage resistance pack of the present invention, the tip of the lead wire is fixed by being obliquely sandwiched in the insertion direction by the edge portion of the slit formed in the metal plate of the lead wire holding member, so that the It is possible to quickly fix the lead wire and make electrical connection.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The high voltage resistance pack of this embodiment is a so-called focus pack for adjusting the focus voltage of a CRT, and a ceramic circuit board (not shown) in which a resistor is printed and formed in an insulating resin case 10 such as Noryl resin and The variable resistor etc. are stored. This circuit board is formed with two types of resistors, that is, a resistor for a focus voltage adjusting variable resistor and a resistor for a screen voltage adjusting variable resistor, and a resistor associated therewith. The variable resistor (not shown) includes a slider (not shown) that slides on the variable resistor resistors and an operating shaft thereof. These circuit board and variable resistor are provided in the variable resistor housing portion 12 of the resin case 10, and the insulating resin 14 such as epoxy resin is poured into the variable resistor housing portion 12 to open the opening. Parts are sealed and insulated. The operation shaft of each variable resistor is coaxially fixed to the operation knob 15.

A lead wire fixing portion 18 for fixing the lead wire 24 is formed on a side of the variable resistor housing portion 12 of the resin case 10, and a lead wire formed of a metal plate is formed on the lead wire fixing portion 18. The holding member 20 is attached. The lead wire holding member 20 is held and fixed on both sides by locking pieces 19 projecting from the lead wire fixing portion 18. As shown in FIGS. 1 and 2, the lead wire holding member 20 has a cross-shaped slit 22 cut in the center thereof, and a lead wire 24 is inserted in the center of the slit. As shown in FIG. 5, the thickness of the tip portion 26 of the conductor portion of the lead wire 24 is thicker than the gap of the slit 22, and the tip portion 26 is inserted by slightly expanding the slit 22. There is. Further, since the conductor portion of the tip portion 26 is a stranded wire, the solder 34 is impregnated to solidify the tip portion 26 so that the tip portion 26 can be easily inserted into the slit 22.

The lead wire insertion surface 35 of the lead wire holding member 20 on which the slit 22 is formed is divided by the slit 22 into triangular divided pieces 36, 37, 38, 39. The lead wire insertion surface 35 has a box-shaped portion 30 surrounding the tip portion 26 of the lead wire 24 formed by bending a metal plate at the four side portions at the tip end portion in the insertion direction of the lead wire 24 at a right angle. There is. Then, a portion forming one side surface of the box-shaped portion 30 is extended to form a connecting portion 28, which extends over the partition wall 32 of the resin case 10 and extends into the variable resistor storage portion 12. In the variable resistor accommodating portion 12, a tip portion of the connecting portion 28 is connected to an electrode portion of a circuit board (not shown), and the tip portion is embedded in the insulating resin 14.

A capacitor housing portion 13 is formed in the resin case 12 of this high voltage resistance pack. A holding piece 40 for holding a film capacitor (not shown) is formed in the capacitor housing portion 13, and lead wire locking portions 42 are provided on both sides of the holding piece 40. Further, another lead wire locking portion 42 is also formed on one side edge portion of the resin case 10. Further, the base end portion of the connection terminal 44 is projected on the circuit board covered with the insulating resin 14, and the central portion of the connection terminal 44 is fixed to one side edge portion of the resin case 10.

In the method of manufacturing the high voltage resistance pack of this embodiment, the circuit board and the like are housed in the resin case 10, the lead wire holding member 20 is attached to the lead wire fixing portion 18, and the opening of the resin case 10 is insulated. Seal with resin 14. At this time, the tip of the connecting portion 28 of the lead wire holding member 20 is also fixed by the insulating resin 14. The lead wire holding member 20 has its tip embedded in the insulating resin 14 while being bent by the connecting portion 28 before being attached to the lead wire fixing portion 18 and being held by the locking piece 19. It is securely fixed by the connecting portion 28 and the locking piece 19, and there is no need for adhesion or the like.

Then, the lead wire 24 having the tip portion 26 previously hardened with the solder 34 is inserted into the slit 22 of the lead wire holding member 20. At this time, the slit 22 is spread by the tip portion 26 of the lead wire 24, and the triangular divided pieces 36, 37, 38, 39 are slightly deformed in the insertion direction of the lead wire 24, and the tip portion 26 is removed. Hold it elastically. Even if the lead wire 24 once inserted into the slit 22 is to be pulled out from here, the edge portions of the triangular divided pieces 36, 37, 38, 39 that have digged into the tip portion 26 have two points in FIG. As indicated by the chain line, even if the tip end portion 26 of the lead wire 24 is obliquely contacted and the tip end portion 26 is pulled out from this state, a force in the direction of narrowing the gap between the slits 22 acts and Since the gap between the slits 22 cannot be narrowed any further, the lead wire 24 does not move at all. In the focus pack of this embodiment, a voltage of about 1 kV to 50 kV is applied and various lead wires are connected. However, in a later process, a hard resin such as epoxy resin is integrated with the flyback transformer to form a gap. It is vacuum-molded in such a manner as to prevent external discharge from being generated from the lead wire holding member 20 and the capacitor housing portion 13.

According to the high voltage resistance pack of this embodiment, the lead wire 24 can be securely and electrically connected to the terminals of the circuit board without soldering the lead wire 24, and the manufacturing process is improved. Man-hours can also be significantly reduced. Further, since the tip end portion 26 of the lead wire 24 is located surrounded by the box-shaped portion 30 of the metal plate, it is highly safe against high voltage. Further, the tip end portion 26 of the lead wire 24 is formed such that the stranded wire is solidified with the solder 34 and is easily and surely inserted into the slit 22.

The slits of the lead wire holding member of the high voltage resistance pack of the present invention have a cross shape as well as three or more slits in a radial shape to hold one lead wire. Is also good. Further, the shape of the box-shaped portion may be a conical shape or the like as long as it surrounds the tip portion of the lead wire. The tip of the lead wire may be hardened with solder, other metal brazing, or the tip may be hardened with conductive paint. In addition, a part of the tip may be hardened with insulating resin so that the conductor behind the cured resin part contacts the lead wire holding member, not the stranded wire but the core of the lead wire. It goes without saying that a single wire may be used for.

[0017]

[Effect of device]

 In the high voltage resistance pack of this invention, the tip end of the lead wire is inserted into the slit of the metal plate forming the lead wire holding member, so that the lead wire can be made strong without soldering to the terminal. It can be electrically and reliably connected to the circuit of the insulating board, and the connection can be completed simply by inserting the tip of the lead wire into the slit of the lead wire holding member, and the number of manufacturing steps can be greatly reduced. You can Also, since the connection and fixing can be done simply by inserting the tip of the lead wire into the slit, regardless of the thickness of the lead wire, lead wires of various thickness can be inserted into the slit of the lead wire holding member of the same structure. Can be inserted.

Furthermore, by forming the slits radially and inserting the tip of the lead wire into the center of the slit, and by solidifying the tip of the lead wire, it is possible to easily insert between the slits. At the same time, it firmly resists pulling out of the lead wire and secures the fixing. In addition, by enclosing the tip of the lead wire with the box-shaped part of the lead wire holding member, the contact part between the lead wire and the edge of the slit is surrounded by the conductor, ensuring high safety against discharge. The reliability and safety of this high-voltage resistor pack and the device to which it is attached can also be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a lead wire holding member of a high voltage resistance pack according to an embodiment of the present invention.

FIG. 2 is a front view of a lead wire holding member of this embodiment.

FIG. 3 is a plan view of a high voltage resistance pack according to this embodiment.

FIG. 4 is a partially cutaway front view of the high voltage resistance pack according to this embodiment.

FIG. 5 is a vertical cross-sectional view of a lead wire holding member of the high voltage resistance pack according to this embodiment.

FIG. 6 is a vertical cross-sectional view of a conventional lead wire holding portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Resin case 20 Lead wire holding member 22 Slit 24 Lead wire 26 Tip part 30 Box-shaped part 34 Solder

Claims (2)

[Scope of utility model registration request] 1. In a high voltage resistance pack, wherein a circuit board and a variable resistor are provided in an insulating resin case, and a high voltage is applied to the circuit board, a lead wire holding member having a slit formed in a metal plate of a predetermined shape. The lead wire holding member is fixed in the resin case, a lead wire having an outer shape thicker than the gap of the slit is inserted into the slit, and the peripheral edge of the slit of the metal plate is slightly bent in the inserting direction. And a high-voltage resistance pack which is elastically pressed against the side surface of the tip of the inserted lead wire. 2. A circuit board and a variable resistor are provided in an insulative resin case, and in a high voltage resistance pack in which a high voltage is applied to the circuit board, radial slits are formed in a metal plate of a predetermined shape, and A metal plate around the portion where the slit is formed is bent to one side to provide a lead wire holding member in which a box-shaped portion is formed, and this lead wire holding member is fixed in the resin case, The tip of the lead wire whose outer shape is thicker than the gap in the central portion is solidified, and this is inserted from the slit central portion in the bending direction of the box-shaped portion, and the slit forming portion of the metal plate is slightly in the insertion direction. A high-voltage resistance pack, which is bent and elastically pressure-contacted with a side surface of a tip portion of the inserted lead wire.