JPS6023915Y2 - cathode ray tube socket board - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cathode ray tube socket board that is attached to a cathode ray tube in a receiver or the like.

Generally, a color TV receiver uses a socket board in which a color output circuit and a screen voltage extraction circuit are constructed on an insulating board to which a cathode ray tube socket is glued.

However, the circuits connected to the cathode ray tube include not only the color output circuit and the screen voltage extraction circuit, but also, for example, a focus voltage extraction circuit connected to the focus electrode of the cathode ray tube.

This focus voltage extraction circuit is normally configured to be extracted from the high voltage winding of a flyback transformer via a high voltage variable resistor, and inside the TV receiver/image set, it is installed upright on the chassis body. For installation, a high-voltage variable resistor is attached to the plate, and the lead wire from this resistor is connected to a predetermined pin terminal of a cathode ray tube socket attached to the socket board.

Therefore, in conventional TV receivers, a large space is required to install the high-voltage variable resistor, and the presence of the lead wire from the resistor may cause problems such as induction. It is something.

The present invention has been made to eliminate these various disadvantages, and it is an object of the present invention to provide a cathode ray tube socket board that also integrates a high-voltage variable resistor for extracting the focus voltage.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a cross-sectional side view of the main part of the cathode ray tube socket board, and FIGS. 2 and 3 are partial plan views showing the main part of the board surface.
FIG. 2 shows the front side, and FIG. 3 shows the back side.

In these figures, 1 is an insulating substrate such as alumina, 2.
3.4.5.6 are film resistors connected to one end of the insulating substrate, of which 2 and 4.6 each form a fixed resistor, and 3 is a high voltage resistor for extracting the focus voltage. 5 forms a resistor part of a variable resistor, and 5 forms a resistor part of a high-voltage variable resistor for extracting a screen voltage.

7 and 8 are film resistors 3 forming the resistor part of the variable resistor.
, 5 are the center electrodes, and 9, 10, 11, 12 are terminal electrodes connected to each film resistor and the center electrode, and through holes 13°, 14.
15 is provided.

Reference numerals 16, 17, 18, 19, 20, 21, and 22 are through holes arranged in an arc shape in the center of the board 1, into which the pin terminals of the cathode ray tube socket are inserted. Electrodes 23, 24, 25, 26, 27, 28, 29 and 3 are provided on each of the front and back surfaces of the substrate 1 so as to surround it.
0, 31, 32, 33 degrees, 34, 35, 36 degrees are provided.

Here, a pin terminal for grounding is inserted into the through hole 19, and the electrode 26 on the surface of the substrate is integrally connected to the terminal voltage 12 of the film resistor 6, and the electrode 33 on the back surface of the substrate is connected to the terminal voltage 12 of the film resistor 6.
is connected to a ring-shaped electrode 37 provided at the center of the substrate surrounded by the through holes 16 to 22.

3B, 39, 40, 41, 42.43 are electrodes 30, 31, 32° 34, 35, 36 on the back surface of the substrate 1, respectively;
These are through holes that form a discharge gap provided in the substrate between the ring-shaped electrodes 37, and opposing discharge electrode portions protrude from each electrode across these through holes.

44 forms a discharge gap provided on the substrate between the ring-shaped electrode 37 and the electrode 45 provided on the back side of the substrate 1 of the through hole 14 of the terminal electrode 10 connected to the center electrode 7 of the film resistor 3. It is a through hole that connects the electrode 45 and the ring-shaped electrode 37.
A discharging electrode portion is made to protrude from the through hole to face the other side.

Although not shown, electronic components such as transistors, resistors, and capacitors constituting necessary cathode ray tube peripheral circuits such as color output circuits are arranged on the insulating substrate 1, and the respective required outputs are connected to the insertion of the pin terminals of the cathode ray tube socket. is connected to the electrode of the through hole.

46 is a film resistor 2, 3, 4, 5 on the surface of the insulating substrate 1.
．． An insulating case 47 provided to cover the insulating case 46 is a rotary shaft projected from the upper surface of the insulating case 46, and is used to rotate the film resistor 3 of the high-voltage variable resistor for extracting the focus voltage to the center electrode 7 of the insulating case 47. It is connected to a flange portion 49 provided with a slider 48 that slides around the center.

Reference numeral 50 denotes a rotating shaft configured similarly to the rotating shaft 47, which constitutes a high-voltage variable resistor for extracting the screen voltage.

Note that the insulating case 46 has hook-shaped pieces 51 and 52 provided at both longitudinal ends thereof, and a through hole 53 provided in the substrate 1.
54 and is elastically attached to the substrate 1.

55 is a through hole 13 provided in the terminal electrode 9 of the film resistor 2
This is a terminal board that is inserted into the board 1 and pulled out to the back side of the board 1, and is connected to the output end of the rectifier circuit connected to the high voltage winding of the flyback transformer.

Reference numeral 56 denotes a cathode ray tube socket attached to the back side of the board 1, with each pin terminal inserted into a predetermined hole in the board 1, and fixed by soldering to each electrode around the hole. .

In addition, bra, 4. The pin terminal of the focus electrode part of the tube socket is inserted into the through hole 14 of the terminal electrode 10 connected to the center electrode 7, which is the focus voltage extraction part, at the same time as the other pin terminals are inserted into the respective through holes, It is connected and fixed to the electrode 10.

In addition, the terminal electrode 11 which is the extraction part of the screen voltage
is connected to the pin terminal position electrode of the screen electrode portion of the cathode ray tube socket on the back side of the substrate through the through hole 15.

Reference numeral 57 denotes an insulating sleeve provided to cover the terminal plate 55, and is formed integrally with the cathode ray tube socket 56.

After the output end of the rectifier circuit is connected to the terminal plate 55, the insulating sleeve 57 is covered with an insulating backing (not shown) to prevent discharge from the tip of the terminal plate 55.

Although the cathode ray tube socket board of the present invention is constructed as described above, it is not necessarily limited to that of the above embodiment.

For example, the position of the film resistor constituting the high-voltage variable resistor on the insulating substrate, the position of the through hole into which the pin terminal of the cathode ray tube socket is inserted, etc. are completely arbitrary and may be determined as appropriate depending on the overall circuit configuration. It is something that

Further, in the above embodiment, two types of high-voltage variable resistors for taking out the focus voltage and the screen voltage are provided on the substrate 1, but the variable resistor for taking out the screen voltage is configured separately from the substrate 1. You may also use something.

Even in this case, no problem occurs because the screen voltage has a sufficiently lower value than the focus voltage.

Further, a resistor made of a film resistor is formed between the center electrode 7 of the film resistor 3 constituting the variable resistor for extracting the focus voltage and the terminal electrode 10 connected thereto. You can also do it.

Furthermore, it goes without saying that the cathode ray tube socket board of the present invention cannot necessarily be used only for TV receivers, but can also be used for other cathode ray tube display devices such as black and white TV receivers. .

For example, when used in a black and white TV receiver, there is no color output circuit in the cathode ray tube peripheral circuit, so a normal video output circuit and other appropriate cathode ray tube peripheral circuits are integrated on the substrate 1.

The cathode ray tube socket board of the present invention can be modified in various other ways, but the point is that when a high-voltage variable resistor for taking out the focus voltage is integrated with the board, the electrode part for taking out the focus voltage can be modified. The pin terminal for the focus electrode of the cathode ray tube socket may be inserted into the provided through hole, and the pin terminal may be connected to the focus voltage extraction electrode.

Since the cathode ray tube socket board of the present invention is constructed as described above, the high-voltage variable resistor for extracting the focus voltage can be integrated into the socket board in an extremely compact manner, making it unnecessary to install it inside a set such as a TV receiver. Does not require a lot of space.

In addition, since there is no need for a focus voltage lead line as in the prior art, there is no risk of interference such as induction, and various effects are achieved, such as being extremely advantageous in terms of cost.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of a main part of a cathode ray tube socket board according to an embodiment of the present invention, and FIGS. 2 and 3 are partial plan views showing main parts of an insulating substrate used in a cathode ray tube socket board of the present invention. FIG. 2 shows the front side, and FIG. 3 shows the back side. 1...Insulating substrate, 2. 3. 4.5. 6.
... Film resistor, 7, 8 ... Center electrode,
9,10,11゜12...Terminal voltage, 13,1
4, 15, 16, 17. 18, 19, 20, 21, 22
,38,39.40,41,42,43,44,45,
53.54...Through hole, 23, 24, 25, 26
,27.28,29,30,31,32,33,34,
35. 36. 37. 45... Electrode, 4
6... Insulation case, 47, 50... Rotating shaft, 48... Slider, 49... Flange portion, 51, 52... ...Hook-shaped piece, 55...
...Terminal board, 56...Cathode ray tube socket, 5
7...Insulating sleeve.

Claims (1)

[Scope of utility model registration request] an insulating substrate; a cathode ray tube socket in which pin terminals are inserted into a plurality of through holes provided at predetermined positions of the insulating substrate and connected to electrodes provided around the through holes;
A cathode ray tube comprising at least a predetermined cathode ray tube peripheral circuit configured on a front insulating substrate and connected to a pin terminal of the cathode ray tube socket, and a high voltage variable resistor provided on the insulating substrate for taking out a focus voltage. The socket substrate is provided with a film resistor forming a resistor portion of the high-voltage variable resistor and its necessary terminal electrodes on the insulating substrate, and a focus voltage extraction electrode portion of the terminal electrodes. A through hole is provided in the insulating board,
A cathode ray tube socket board, characterized in that a pin terminal for a focus electrode of the cathode ray tube socket is inserted into the through hole and connected to the focus voltage extraction electrode.