JPH0723923Y2 - High voltage resistor pack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a high voltage resistor pack in which a variable resistor for adjusting a focus voltage of a CRT (Cathode Ray Tube) is housed in an insulating case.

[Prior Art] Conventionally, a so-called focus pack, which is a high voltage resistor pack provided with a variable resistor for adjusting a focus voltage of a CRT,
To match various types of CRTs, as shown in Figure 10,
The terminal 10 protruding from the case 1 may be retrofitted at an appropriate place. The post-installed terminal 10 is sandwiched between the terminal holding portions 1b at the edge 1a of the case and a part thereof is melted and fixed.

[Problems to be Solved by the Invention] In the case of the above-mentioned conventional technique, the post-installed terminal 10 is likely to move with respect to an external force, and the misaligned terminal causes defects and a reduction in yield in the subsequent assembly work. Especially in automatic assembly, even a slight deviation causes a defect, and the positional deviation of terminals is a serious problem.

This invention was made in view of the above-mentioned conventional technology,
An object of the present invention is to provide a high-voltage resistance pack in which the attachment strength of the post-installed terminals is high and the positional displacement does not occur.

[Means for Solving the Problem] The present invention provides a pair of holding portions for holding a post-installed terminal on an end surface of a case in which a circuit board having a variable resistor used for adjusting a focus voltage of a CRT is housed. The post-installed terminal is clamped in the holding part of the device, and the pair of holding parts are melted to fix the post-installed terminal to the edge of the case. A piece is formed, and a locking portion for locking the convex piece is formed on the terminal fixing portion of the outer wall edge of the case, and the convex piece is locked to the locking portion to hold and fix the terminal. It is a voltage resistance pack.

[Operation] In the high-voltage resistance pack of the present invention, the holding terminal at the edge of the case holds the post-installed terminal, and the engaging edge is provided at the edge of the case. The terminal does not move with respect to external force, and the position of the terminal does not shift.

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

FIG. 1 to FIG. 8 show an embodiment of the present invention. The high voltage resistor pack of this embodiment is a so-called focus pack for adjusting the focus voltage and screen voltage of the CRT. The capacitor 2 and the resistor substrate 15 are housed. On the resistor substrate 15,
A ground terminal 3, a capacitor input terminal 4, a focus and screen voltage output terminal 5 are provided in a protruding manner. The side of the resistor substrate 15 on which the terminals 3 to 5 connected to the coil such as the flyback transformer protrude is the case 1
It is attached to the inside of the case 1 such that it is on the opening side.
An epoxy resin is poured into the opening of the case 1 to form an insulating resin layer 6 that covers the resistor substrate 15 and seals the inside of the case 1. This ensures internal insulation, but resin does not flow inside the resistor substrate 15, and a brush described later can be slidably contacted with the resistor.

Then, one lead 7 of the capacitor 2 is locked to the lead locking portion 8 and is inserted into a through hole (not shown) at the tip of the terminal 4 and soldered. The other lead 7
Is connected to and soldered to a locking projection 11 of a post-installed terminal 10 which is attached by being sandwiched between holding portions 1b formed on the edge 1a of the case 1.

As shown in FIGS. 4 to 6, the retrofit terminal 10 is provided with a lead locking projection 11 at the base end and a pair of projections 12 provided in the opposite direction. A slight bulge 13 is formed on the side surface of the. In this post-installed terminal 10, the protruding piece 12 is fitted in the groove portion 1c formed in the edge 1a of the case 1 shown in FIG. 7, both side portions are held by the holding portion 1b, and further, one portion of the holding portion 1b. The part is melted and the post-installed terminal 10 is securely held. The holding portion 1b and the groove portion 1c are
They are provided on the edge 1a of the case 1 at positions displaced inward and outward.

Further, the case 1 is provided with focus voltage and screen voltage adjustment knobs 9, and the adjustment knob 9 is provided with a brush 16 which is in sliding contact with a resistor on the resistor substrate 15 so that focus and screen voltage can be adjusted. I have to.

The high voltage resistance pack of this embodiment has a convex piece on the retrofit terminal 10.
Since the protrusion 12 is provided and the protrusion 12 is fitted into the groove 1c of the case terminal 1a to be locked and held and fixed, the protrusion 12 is securely fixed in addition to being held by the holding portion 1b.

Further, since the bulging portion 13 is formed on the convex piece 12, the bulging portion 13 is securely held when fitted into the groove portion 1c.

Next, another embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, instead of the groove, a ridge 1d is formed on the inner surface of the outer wall of the case 1 as a locking portion. And ridge
A pair of convex pieces 12 is fitted and fixed in 1d.

According to this embodiment, since the protruding piece 12 is fitted into the protruding strip 1d, the work is easier than inserting it in the groove. Also, the edge 1a of the case 1
Can be provided regardless of the wall thickness, and the strength of the case edge 1a can be increased without lowering.

The high-voltage resistor pack of the present invention may be any one as long as the protruding piece of the post-installed terminal is locked to the locking portion at the edge of the case, and the number and shape of locking portions and locking means are not limited. . The retrofit terminal may be any terminal to which leads of a capacitor or other electronic component are connected, and the type of electronic component and the method of connecting the leads are not limited.

[Effects of the Invention] The high-voltage resistor pack of the present invention is provided with a projecting piece on the post-installed terminal fixed to the edge of the case, and the projecting piece is locked to the engaging part of the edge of the case to hold the post-installed terminal Since it is fixed, the mounting strength of the post-installed terminal is very high, and the terminal position does not change even when the holding part is melted or in the post process, and the installation accuracy is high. Moreover, the number of steps for assembling the retrofit terminal does not increase at all, and the cost of the product does not increase. Further, in the post-installed terminal of the high voltage resistance pack of the present invention, since the pair of holding portions are melted from both sides and fixed to the edge of the case, when the pair of holding portions are melted, the pair of holding portions are melted. Even a slight gap between the post-installed terminal and the post-installed terminal is filled with the molten resin, and the post-installed terminal is firmly fixed to the edge of the case without slight rattling.

Further, by providing the holding portion and the locking portion at different positions in the inner and outer directions on the edge of the case, the post-installed terminal may rattle against the force in the plane including the edge of the case. Instead, it is possible to extremely firmly fix the post-installed terminal to the edge of the case.

Therefore, no defects are generated even when the high voltage resistance pack is assembled, which greatly contributes to the improvement of the yield particularly in the automatic assembly.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the high voltage resistance pack of the present invention, FIG. 2 is a partially cutaway right side view of this embodiment, FIG. 3 is a bottom view of this embodiment, and FIG. FIG. 5 is a plan view of the retrofit terminal of the example, and FIG. 5 is a front view of the retrofit terminal of this embodiment.
FIG. 6 is a right side view of the post-installed terminal of this embodiment, FIG. 7 is a perspective view showing a case edge portion of this embodiment, and FIG. 8 is a plan view showing a state of use of the post-installed terminal of this embodiment. FIG. 9 is a perspective view showing a case edge portion of another embodiment of the present invention,
FIG. 10 is a plan view showing a usage state of a conventional post-installed terminal. 1 ... Case, 1a ... Case edge, 1b ... Holding part, 1c ... Groove, 1d
… Ridges, 3,4,5… Terminals, 7… Leads, 10… Post-installed terminals, 1
2 ... convex piece,

Claims (3)

[Scope of utility model registration request] 1. A pair of holding parts for holding a post-installed terminal are provided on an end face of a case having a variable resistor used for adjusting a focus voltage of a CRT, and a circuit board on which the variable resistor is provided. The retrofit terminal is sandwiched between the pair of holding portions, and the pair of holding portions are melted to fix the retrofit terminal to the end edge of the case. And forming a locking portion for locking the convex piece on the terminal fixing portion on the outer wall edge of the case, and holding and fixing the terminal by locking the convex piece on the locking portion. Characteristic high voltage resistance pack. 2. The locking portion is a groove formed at an edge of the outer wall of the case at a position different from a position where the terminal holding portion is formed on the terminal mounting surface, and the groove is formed in the groove. 2. The high voltage resistance pack according to claim 1, wherein the convex piece is fitted into the case and the post-installed terminal is held and fixed to the case. 3. The engaging portion is a ridge formed inside the outer wall of the case, and is provided at a position different from the place where the terminal holding portion is formed on the terminal mounting surface. 2. The high-voltage resistor according to claim 1, wherein the piece is composed of a pair of opposed projecting pieces, and the pair of projecting pieces are engaged with the projecting strips so that the retrofit terminal is held and fixed to the case. pack.