JPH0334826Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cathode ray tube built-in resistor holding device that holds a built-in resistor that is incorporated together with an electron gun assembly in the tube of a color cathode ray tube.

BACKGROUND OF THE INVENTION Some color cathode ray tubes used in color television receivers require a relatively high voltage to be supplied to focus electrodes, convergence electrodes, etc. in addition to the anode voltage. . In such a cathode ray tube, in order to divide the anode voltage to obtain respective high voltages, a voltage dividing resistor is incorporated as a built-in resistor in the network together with the electron gun assembly.

Built-in resistors used in this way are e.g.
A high voltage electrode terminal to which an anode voltage is applied, a convergence electrode terminal to which a convergence voltage is obtained, and a ground electrode terminal to be grounded directly or through a predetermined adjustment resistor are formed on the insulating substrate. A voltage dividing resistor layer is arranged between the terminal and the convergence electrode terminal and between the convergence electrode terminal and the ground electrode terminal, respectively, and these voltage dividing resistor layers are covered with an insulating coating made of glass material or the like. composed of Then, such a built-in resistor is attached to the electron gun assembly, but in that case, for example, the portion of the insulating substrate of the built-in resistor where the high voltage electrode terminal is provided, the portion where the convergence electrode terminal is provided, and the ground electrode terminal A holding device is used that holds the built-in resistor by engaging with each of the portions provided with the built-in resistor, and the built-in resistor is supported by the electron gun assembly via this holding device. The holding device that holds these built-in resistors is
Each of them is made of a conductive material such as a metal material, and serves to hold a built-in resistor and at the same time make electrical contact with each of the high voltage electrode terminal, convergence electrode terminal, and ground electrode terminal.

5A and 5B partially show a state in which the built-in resistor is attached to the electron gun assembly within the neck portion of the cathode ray tube using the previously proposed holding device as described above. In FIGS. 5A and 5B, an electron gun assembly including a grid electrode G5 and a convergence means 2 is arranged inside the neck portion 1a of the tube body 1 of the cathode tube. The convergence means 2 includes an inner deflection plate 2a connected to the grid electrode G5 and an outer deflection plate 2b facing the inner deflection plate 2a. and,
In such an electron gun structure, a built-in resistor 7 configured by disposing a convergence electrode terminal 4 and a voltage dividing resistor layer 5 on an insulating substrate 3 and covering them with an insulating coating 6 is attached to a holding device 8. It is held by and attached via this holding device 8.

The holding device 8 is formed of a metal material and includes a flat plate part 9, a pressing part 10 consisting of pressing pieces 10a and 10b facing the flat plate part 9, and a connecting part 11 connecting the flat plate part 9 and the pressing part 10. , and mounting portions 12 extending from both ends of the flat plate portion 9. The flat plate part 9 is in contact with the surface 3a of the insulating substrate 3 of the built-in resistor 7, which is the side facing the electron gun assembly, and each of the pressing pieces 10a and 10b of the pressing part 10 is connected to the built-in resistor. The insulating substrate of the built-in resistor 7 is configured to elastically press the convergence electrode terminal 4 disposed on the side facing the inner wall surface of the neck portion 1a of the insulating substrate 3 at one end of the insulating substrate 7. 3 is held between the flat plate part 9 and the pressing part 10 to hold the built-in resistor 7, and its mounting part 12 is placed on the outer deflection plate 2b of the convergence means 2, and spot welded at positions 12a and 12b. and is fixed to the outer deflection plate 2b.

In this way, the built-in resistor 7 is connected to the holding device 8
The convergence electrode terminal 4 and the outer deflection plate 2b of the convergence means 2 are electrically connected by the holding device 8. As a result, the anode voltage applied to the built-in resistor 7 is divided by the voltage dividing resistor layer 5, and the convergence voltage obtained at the convergence electrode terminal 4 is transferred to the outer deflection plate of the convergence means 2 through the holding device 8. 2b.

In FIGS. 5A and 5B, the grid electrode G5 has a graphite conductive film 1c extending from the inner wall surface of the funnel portion 1b of the tube body 1 to the inner wall surface of the neck portion 1a via the contact 13. The applied anode voltage is supplied to the inner deflection plate 2a of the convergence means 2.
An anode voltage is also applied to the

Although not shown, the insulating substrate 3 of the built-in resistor 7 is held between the high-voltage electrode terminal and the ground electrode terminal provided on the built-in resistor 7 by a holding device similar to the holding device 8. A grid electrode G5 is attached to the electrode terminal through a holding device.
The anode voltage of the cathode ray tube is supplied from the terminal, and the ground potential is applied to the ground electrode terminal through the holding device, either directly or via an adjustment resistor.

Problems to be Solved by the Invention However, in the previously proposed built-in resistor holding device as described above, the insulating substrate of the built-in resistor is placed in the neck portion of the cathode ray tube so as to face the inner wall surface of the neck portion. The pressing piece that forms the pressing part that presses elastically from the side facing It has a shape that is curved away from the side facing the inner wall surface of the neck part, so that the free end of the pressing piece faces outward from the electron gun assembly with the built-in resistor attached. It will stand out. For this reason, during handling or transportation of the electron gun assembly to which the built-in resistor is attached, the free end of the presser piece may undesirably engage with another object, causing the presser piece to be deformed. There is a problem in that the insulating substrate cannot be reliably held. Further, as shown in FIGS. 5A and 5B, the pressing piece forming the pressing part elastically presses the electrode terminal disposed on the side facing the inner wall surface of the neck part of the insulating substrate of the built-in resistor. When the pressing piece also serves as an electrical connection, if the pressing piece is deformed as described above, the contact with the electrode terminal becomes incomplete, and the anode voltage supplied to the built-in resistor or the voltage supplied from the built-in resistor becomes insufficient. cause a decrease in the convergence voltage, etc.
Alternatively, contact with the electrode terminals may be lost, leading to inconveniences such as the anode voltage not being supplied to the built-in resistor or the convergence voltage being supplied from the built-in resistor, and the normal operation of the cathode ray tube being disrupted. There is a risk that it will not be carried out. Furthermore,
There is also a possibility that the free end of the deformed pressing piece will be close to the inner wall surface of the neck portion, and a leakage current will flow between it and the inner wall surface of the neck portion.

In view of these points, the present invention is designed to hold a built-in resistor by sandwiching its insulating substrate within the network of a cathode ray tube, and to sandwich the insulating substrate of the built-in resistor when used to support an electron gun structure. Undesirable deformation of the part is extremely difficult to occur, the built-in resistor can be held securely, and the required electrical connection state with the built-in resistor can be properly maintained as necessary. An object of the present invention is to provide a holding device for a built-in resistor in a cathode ray tube.

Means for Solving the Problems A holding device for a built-in resistor of a cathode ray tube according to the present invention, which is intended to achieve the above-mentioned object, holds a built-in resistor that is used by being attached to an electron gun assembly within a neck portion of a cathode ray tube. It is configured to include a clamping part that clamps the board of the built-in resistor, and a mounting leg part extending from the clamping part. And the clamping part is
A flat plate-shaped portion extending along the first surface facing the inner wall of the neck portion of the board of the built-in resistor and supporting the board from the first surface side; It is formed of a pressing part disposed to elastically press the substrate of the built-in resistor and its second surface facing the electron gun assembly, and a connecting part connecting the flat plate-shaped part and the pressing part. , the board of the built-in resistor is held between the flat plate portion and the pressing portion.

In the holding device for a cathode ray tube built-in resistor according to the present invention constructed as described above, the flat plate portion of the holding portion and the pressing portion are arranged such that the pressing portion is attached to the electron gun structure of the substrate of the built-in resistor. A second surface side, which is an opposing side, is disposed to clamp the board of the built-in resistor, and a mounting leg extending from the clamping part is fixed to the electron gun structure,
The built-in resistor held by the holding part is attached to the electron gun structure. In this way, the flat plate-shaped portion, which does not have a protrusion and is along the first surface of the substrate of the built-in resistor, is placed on the outside of the built-in resistor attached to the electron gun assembly, and the pressing portion By disposing it between the built-in resistor and the electron gun assembly, that is, inside the built-in resistor, the possibility that the clamping part will be undesirably deformed is significantly reduced.

Example Examples of the present invention will be described below.

1A, B and C show an example of a holding device for a built-in resistor in a cathode ray tube according to the present invention. This example includes, for example, a clamping part 20 that clamps an insulating substrate of a built-in resistor as shown in FIGS. 5A and B, and a clamping part 20 extending from both ends of this clamping part 20, It is made of an elastic metal material and includes a mounting leg part 21 that is fixed to an electron gun assembly disposed within the neck part of a cathode ray tube as shown in FIG.

The clamping part 20 is a flat plate-like part 2 extending along a first surface of the insulating substrate of the built-in resistor to be clamped, which is the side facing the inner wall of the neck part of the cathode ray tube.
2, a pressing portion 23 provided at a position facing the flat plate portion 22 to elastically press the insulating substrate of the built-in resistor from a second surface side facing the electron gun assembly; It is composed of a connecting portion 24 that connects a flat plate-like portion 22 and a pressing portion 23. The flat plate portion 22 is provided with three protrusions 22a that protrude toward the pressing portion 23 in order to support the insulating substrate of the built-in resistor from its first surface side. are press pieces 23b, 23c, and 23 disposed corresponding to the peripheral flat plate 23a and the protrusion 22a of the flat plate-like portion 22, respectively.
It is composed of d. Pressing pieces 23b and 23d
is bent so as to protrude toward the flat portion 22, and the pressing piece 23c extends diagonally toward the flat portion 22. In detail, the projection 22a of the flat portion 22 and the pressing portion 23 Pressing piece 23
b, 23c and 23d sandwich the insulating substrate of the built-in resistor.

Note that the mounting leg portion 21 is provided with a protrusion 21a that comes into contact with the electron gun structure.

Figure 2 A and B are such Figure 1 A, B and C.
An example of the holding device shown in FIG. 5 is applied to the built-in resistor and electron gun assembly shown in FIGS. 5A and 5B. In these FIGS. 2A and 2B, parts corresponding to those shown in FIGS. 5A and 5B are designated by the same reference numerals as in FIGS. 5A and 5B.

As shown in Figures 2A and B, Figures 1A and B
and the mounting leg 21 of the example retaining device shown in C.
The protrusion 21a is brought into contact with the outer deflection plate 2b constituting the convergence means 2 of the electron gun assembly, and is fixed by spot welding, for example. Then, the flat plate portion 2 constituting the clamping portion 20
2, the protrusion 22a thereof is brought into contact with the convergence electrode terminal 4 disposed at one end of the surface of the insulating substrate 3 of the built-in resistor 7 facing the inner wall surface of the network portion 1a of the cathode ray tube, Further, the pressing pieces 23b, 23c and 2 constituting the pressing portion 23
3d elastically presses the surface 3a of the insulating substrate 3 of the built-in resistor 7 on the side facing the electron gun structure.

In this way, the insulating substrate 3 of the built-in resistor 7 is held by the holding part 20, and the mounting leg part 21
is fixed to the outer deflection plate 2b constituting the convergence means 2, and the built-in resistor 7 is attached to the electron gun structure. The outer deflection plate 2b constituting the sensing means 2 is electrically connected through the example of the holding device shown in FIGS. 1A, B and C.

In a state where the built-in resistor 7 is attached to the electron gun assembly in this way, the flat plate portion 22 of the clamping portion 20 is located outside the built-in resistor 7, and the built-in resistor 7
Since the pressing pieces 23b, 23c, and 23d of the clamping part 20 are located inside the clamping part 20,
Since the built-in resistor 7 does not have a protruding portion to the outside, the possibility of undesired deformation is extremely small. Therefore, in the case of the example shown in FIGS. 2A and B, the example of the holding device shown in FIGS.
An outer deflection plate 2 that can securely hold the built-in resistor 7 and attach it to the electron gun structure, and that constitutes the convergence means 2 from the built-in resistor 7.
The supply state of the convergence voltage to b can be maintained appropriately.

3A, B and C show other examples of the holding device for the built-in resistor of a cathode ray tube according to the present invention. This example also
For example, a clamping part 30 that clamps an insulating substrate of a built-in resistor as shown in FIGS. 5A and B, and a cathode ray tube extending from the clamping part 30 as shown in FIGS. 5A and B, for example. It is made of an elastic metal material and has a mounting leg part 31 that is fixed to the electron gun structure disposed in the neck part of the electron gun body.

The clamping part 30 is a flat plate-shaped part 3 extending along a first surface of the insulating substrate of the built-in resistor to be clamped, which is the side facing the inner wall of the neck part of the cathode ray tube.
2, a pressing portion 33 provided at a position facing the flat plate portion 32 to elastically press the insulating substrate of the built-in resistor from a second surface side facing the electron gun assembly; It is composed of a connecting portion 34 that connects a flat plate-like portion 32 and a pressing portion 33. The flat plate portion 32 is provided with two protrusions 32a that protrude toward the pressing portion 33 in order to support the insulating substrate of the built-in resistor from its first surface side. is composed of pressing pieces 33a and 33b arranged corresponding to the projections 32a of the flat plate-like portion 32, respectively. The pressing pieces 33a and 33b are bent so as to protrude toward the flat plate portion 32. Specifically, the protrusion 32a of the flat plate portion 32 and the pressing pieces 33a and 33b of the pressing portion 33 are bent to protrude toward the flat plate portion 32. It will hold the insulating substrate.

The mounting leg portion 31 is a plate-shaped body extending from the clamping portion 30 in an L-shape, and has a portion 31 that comes into contact with the electron gun structure.
A is provided.

Figures 4A and B are such Figures 3A, B and C.
An example of the holding device shown in FIG. 5 is applied to the built-in resistor and electron gun assembly shown in FIGS. 5A and 5B. In these FIGS. 4A and 4B, parts corresponding to those shown in FIGS. 5A and B are given the same reference numerals as in FIGS. 5A and 5B.

As shown in Figures 4A and B, Figures 3A and B
and the mounting leg 31 of the example retaining device shown in C.
The portion 31a is brought into contact with the grid electrode G5 of the electron gun assembly and fixed by, for example, spot welding. The flat plate portion 32 constituting the clamping portion 30 has a protrusion 32a that connects to the cathode ray tube's neck portion 1 on the insulating substrate 3 of the built-in resistor 7.
The press pieces 33a and 33b constituting the press portion 33 are brought into contact with a high-voltage electrode terminal 40 to which an anode voltage is supplied, which is disposed on the side of the surface facing the inner wall surface of the ,,Built-in resistor 7
The surface 3a of the insulating substrate 3 on the side facing the electron gun assembly is elastically pressed.

In this way, the insulating substrate 3 of the built-in resistor 7 is held by the holding part 30, and the mounting leg part 31
is fixed to the grid electrode G5, and the built-in resistor 7
is attached to the electron gun structure, and in this example, the high voltage electrode terminal 40 of the built-in resistor 7 and the grid electrode G5 are electrically connected through the example of the holding device shown in FIGS. 3A, B and C. connected.

In the state where the built-in resistor 7 is attached to the electron gun assembly in this way, the flat plate portion 32 of the clamping portion 30 is located outside the built-in resistor 7, and the built-in resistor 7
Since the pressing pieces 33a and 33b of the clamping part 30 are positioned inside the clamping part 30, the clamping part 30 does not have a part that protrudes to the outside of the built-in resistor 7, so there is no possibility of it being undesirably deformed. This is extremely small. Therefore, in the case of the example shown in FIGS. 4A and 4B, the example of the holding device shown in FIGS. The attachment to the gun body can be ensured, and the state of supply of anode voltage from the grid electrode G5 to the built-in resistor 7 can be maintained appropriately.

Effects of the Device As is clear from the above description, the device for holding a built-in resistor in a cathode ray tube according to the present invention holds the built-in resistor in the neck of the cathode ray tube by sandwiching its insulating substrate. When supporting the structure, the pressing part that elastically presses the insulating substrate of the built-in resistor may undesirably engage with other objects during handling or transportation of the electron gun structure to which the built-in resistor is attached. Therefore, there is almost no risk of deformation due to the insulating substrate of the built-in resistor, and therefore, undesired deformation of the clamping portion that clamps the insulating substrate of the built-in resistor is extremely unlikely to occur.
The built-in resistor can be held securely.

In addition, when the clamping part also serves to elastically press the electrode terminal arranged on the insulating substrate of the built-in resistor to establish an electrical connection with the electrode terminal, it is necessary to maintain proper contact with the electrode terminal. Therefore, the anode voltage supplied to the built-in resistor, the convergence voltage supplied from the built-in resistor, etc. can be maintained normally.

Furthermore, there is an advantage that there is no possibility that the pressing portion constituting the clamping portion is deformed and comes close to the inner wall surface of the neck portion of the cathode ray tube, causing a leakage current to flow between the inner wall surface of the neck portion and the like.

[Brief explanation of the drawing]

FIGS. 1A, B, and C are side views, front views, and plan views showing an example of a holding device for a built-in resistor in a cathode ray tube according to the present invention, and FIGS. 2A and B are similar to FIGS. 1A, B, and C. A side view and a plan view showing an example in which the shown example is applied to attaching a built-in resistor to an electron gun structure in a cathode ray tube, and FIGS. A side view, a front view, and a plan view showing other examples of the device; FIGS. 4A and 4B show the example shown in FIGS. A side view and a plan view showing an applied example, and FIGS. 5A and 5B are a side view and a plan view showing a state in which a built-in resistor in a cathode ray tube is attached to an electron gun assembly using a conventionally proposed holding device. It is a diagram. In the figure, 1 is the tube body of the cathode ray tube, 1a is the neck part of the cathode ray tube, 7 is the built-in resistor, 20 and 30 are the clamp parts, 21 and 31 are the mounting legs, 22 and 32 are the flat parts, 23 and 33 is the pressing part, 24 and 3
4 is a connecting part.

Claims (1)

[Scope of utility model registration request] extending along a first surface of a substrate of a built-in resistor attached to the electron gun assembly and disposed within the network of the cathode ray tube, which is the side facing the inner wall of the network;
A flat plate-shaped portion that supports the substrate of the built-in resistor from the first surface side, and a plate-shaped portion that supports the substrate of the built-in resistor from the first surface side; It is formed of a pressing part disposed to elastically press from the second surface side, and a connecting part connecting the flat plate-shaped part and the pressing part,
a clamping portion configured to clamp the substrate of the built-in resistor between the flat plate portion and the pressing portion;
A holding device for a cathode ray tube built-in resistor, comprising a mounting leg portion extending from the holding portion.