JP3032744B2 - Method of manufacturing high voltage resistance pack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a CRT (Cathode
The present invention relates to a method for manufacturing a high-voltage resistance pack in which a variable resistor for adjusting a focus voltage of a ray tube (cathode ray tube) is housed in an insulating case.

[0002]

2. Description of the Related Art Conventionally, a so-called focus pack, which is provided with a variable resistor for adjusting a focus voltage of a CRT and has a capacitor, also accommodates a capacitor in a case. The lead wire on the ground side was attached to a ground terminal connected to a variable resistor for adjusting the focus voltage. The method of connecting the lead wire from the capacitor is described in Japanese Utility Model Laid-Open No. 61-657.
As disclosed in FIG. 1 of Japanese Patent Publication No. 15 (1999), the lead wire from the capacitor is extended linearly, and without being held at any point in the middle, the lead wire is directly connected to the terminal protruding from the substrate on the variable resistor side. It was the one that was attached. The space where the lead wire is stretched is filled with an insulating resin.

[0003]

In the case of the above-mentioned prior art, when the insulating resin is injected into the lead wire extending linearly from the capacitor or when the insulating resin solidifies, the temperature of the insulating resin changes. Unnecessary force is applied to the lead wire due to the expansion and contraction of the lead wire, and there is a problem that the wire is disconnected at the mounting portion at the weak end, the connection portion with the terminal is detached, or a contact failure occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional technology, and has a high lead wire mounting strength, a large force does not act on a connection portion of a lead wire, and a high reliability of the connection portion has high reliability. It is an object of the present invention to provide a method for producing the same.

[0005]

According to the present invention, there is provided a circuit board provided with a variable resistor used for adjusting a focus voltage of a CRT, a resin case accommodating the circuit board,
An electronic component such as a capacitor housed in the case in parallel with the circuit board, a partition dividing the inside of the case into the circuit board housing portion side and the electronic component housing portion side, and an edge of the partition wall. There is provided a groove-shaped lead wire retaining portion for holding a lead wire extending from the electronic component, the circuit board in the case is embedded in resin, and the terminal protruding from the circuit board is This is a high voltage resistance pack that protrudes from the resin surface and has the terminals wound around the terminals and electrically connected thereto.

[0006] Both ends of the terminal are fixed, and a protruding piece around which the lead wire is wound is formed therebetween, and the lead wire is wound around the protruding piece.

According to the present invention, a circuit board provided with a variable resistor used for adjusting a focus voltage of a CRT and the like and a resin case accommodating the circuit board are provided, and terminals are attached to the circuit board. A method for manufacturing a high-voltage resistance pack in which the circuit board is accommodated in a case, the circuit board is embedded in a resin, and the lead wire is wound around the terminal.

According to another aspect of the present invention, there is provided a circuit board provided with a variable resistor used for adjusting a focus voltage of a CRT, and a resin case housing the circuit board. And a partition which is divided into an accommodating portion side of an electronic component such as a capacitor, and a plurality of groove-shaped lead wire locking portions which are formed on the edge of the partition and hold lead wires extending from the electronic component, After attaching the terminals to the circuit board and housing the circuit board in the case, the circuit board is embedded in resin, the electronic components are housed in the housing portion of the case, and the lead wires are connected to the lead wires. A method of manufacturing a high-voltage resistance pack in which the lead wire is wound around the terminal while being held at a stop portion. Lead wire above
Are bent in an S-shape by the plurality of lead wire locking portions and are retained.
It is what you have.

In the high-voltage resistance pack according to the present invention, the lead wire is wired so that the lead wire can be locked to the partition wall of the case. This is to prevent the tension or the like from directly acting on the lead wire itself by receiving the force, so that unnecessary force is not applied to both ends of the lead wire.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show an embodiment of the present invention. A high-voltage resistor pack according to this embodiment is a so-called focus pack for adjusting a focus voltage and a screen voltage of a CRT.
In the case 1, the capacitor 2 as an electronic component and the resistor substrate 15 are accommodated. The case 1 is partitioned into a capacitor accommodating portion 1c and a circuit board accommodating portion 1d by a partition wall 20 at a central portion. The resistor substrate 15 is provided with a ground terminal 3, a capacitor input terminal 4, and a focus and screen voltage output terminal 5 protruding therefrom.

The side of the resistor substrate 15 from which the terminals 3 to 5 protrude is mounted in the case 1 and an epoxy resin is poured into the case 1 from the opening side of the case 1 to completely seal the inside. The layer 6 is formed to ensure inner and outer insulation. On the opposite side, a space is formed, and a brush 16 for adjusting a resistance value described later is slidable on the resistor.

The pair of lead wires 7 extending from the capacitor 2 has one of the lead wires 7 formed in the lead wire retaining portion 8 of the capacitor accommodating portion 1c, and is bent at that portion to form a circuit. It is connected to the terminal 4 of the substrate housing portion 1d. The other lead wire 7 is locked at two places by a lead wire locking portion 8 of a partition wall 20 formed at the center of the case 1, bent into an S shape, and connected to the terminal 3. The connection between the lead wire 7 and each of the terminals 3 and 4 is further soldered. Here, a lead wire 7 is inserted into a through hole (not shown) and connected to the terminal 4, and the lead wire 7 is wound around and connected to a protruding piece 10 to be described later.

The case 1 is provided with adjustment knobs 9 for a focus voltage and a screen voltage. At the lower end of the adjustment knob 9, a brush 16 which is in sliding contact with a resistor on a resistor substrate 15 is attached. And adjustment of the screen voltage.

The ground terminal 3 is connected to a terminal body 3a, which is an intermediate part of the terminal 3 and protrudes from the resistor substrate 15,
The protruding piece 10 is bent at a right angle and protrudes. The protruding piece 10 is formed with an L-shaped engaging portion 11. The lead wire 7 is wound around the projecting piece 10 so as not to come off the engaging portion 11 and is further soldered. In addition, the terminal body 3 a
An intermediate portion thereof is sandwiched between holding portions 1b formed at the end edge 1a, a part of the holding portion 1b is melted and fixed, and the tip of the terminal protrudes from the case 1.

In the focus pack of this embodiment, since a pair of lead wires 7 of the condenser 2 are locked and bent by the lead wire locking portion 8, an external force is applied to the lead wire 7. Is applied, no unnecessary force acts on both ends of the lead wire 7, and the mounting portion on the capacitor 2 side or the terminals 3 and 4 side does not break or a contact failure does not occur. Furthermore, it is unlikely that a large force is applied to the lead wire 7 itself and the lead wire 7 is disconnected in the middle. Also, the protruding piece 1 having the engaging portion 11
Since 0 is provided, the attachment of the lead wire 7 becomes extremely easy, and the attachment strength can be increased.

The high-voltage resistor pack according to the present invention may have a capacitor or a built-in other electronic component. Further, a device having an adjustment device other than the focus adjustment may be used, or a device integrated with the flyback transformer may be used.

[0017]

According to the high-voltage resistance pack of the present invention, a groove-shaped lead wire locking portion is formed in a partition provided in a case, and the lead wire can be locked, thereby facilitating the processing of the lead wire. In addition to reducing man-hours, the lead wire can be securely held, and even if unnecessary force is applied to the lead wire, the lead wire mounting portion is not easily affected and the contact failure does not occur. It is. Further, an excessive force hardly acts on the lead wire itself. Therefore, even at the connection portion of the lead wire to which a high voltage is applied, a reliable connection is made, and the expansion and contraction force of the resin after the connection portion of the lead wire is embedded in the resin cannot be applied to the lead wire and its connection portion. High force does not act, and high reliability can be maintained.

In the method of manufacturing a high-voltage resistance pack according to the present invention, terminals are mounted on a circuit board, the circuit board is housed in a case, and the circuit board is embedded in a resin.
Since the lead wire is wound around the terminal, the work of winding the lead wire becomes easy, the winding strength is high, and the electrical reliability is high.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a high-voltage resistance pack according to the present invention.

FIG. 2 is a partially cutaway right side view of the high-voltage resistance pack according to the embodiment.

FIG. 3 is a bottom view of the high-voltage resistance pack according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Capacitor (electronic component) 3, 4, 5 Terminal 7 Lead wire 8 Lead wire latching part 15 Circuit board 20 Partition wall

Claims (2)

(57) [Claims] 1. A circuit board provided with a variable resistor used for voltage adjustment of a CRT, a resin case accommodating the circuit board, a circuit board accommodating side of the case, and an accommodating section for the electronic component. And a plurality of groove-shaped lead wire locking portions formed on an edge of the partition and holding lead wires extending from the electronic component, and terminals are attached to the circuit board. After the circuit board is housed, the circuit board is embedded in a resin, the electronic component is housed in the housing part of the case, and the lead wire is bent and held by the plurality of lead wire locking parts. And a method of manufacturing a high-voltage resistance pack in which the lead wire is wound around the terminal. 2. The method according to claim 2, wherein the lead wire is a plurality of the lead wires.
The method for manufacturing a high-voltage resistance pack according to claim 1, wherein the locking portion is bent and held in an S-shape .