KR900001702B1 - Color crt - Google Patents

Abstract

The colour CRT is for suppressing the deterioration of colour purity such as colour shift of picture image while to improve the shock resistance by setting specific relation between the spring constant of resilient member and the force to be applied onto a stud pin upon fitting of the resilient member and the stud pin. The displacement of electron beam when the colour CRT is subjected to shock has close relation with the spring constant K of resilient member and the force to be applied onto the corresponding stud pin.

Description

Color awards

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an enlarged sectional view of an essential part of a structure showing the structure and operation of an embodiment of a color water pipe according to the present invention.

2 is a cross-sectional view of a color water tube according to the present invention.

3 is an enlarged cross-sectional view of an essential part explaining the operation when the color water pipe according to the present invention is impacted.

4a, b, c are the change in the electron beam when subjected to the force (F) applied to the stud-pin by the elastic modulus (K) of the elastic member of the color receiving tube according to the present invention ( characteristic diagram showing δ).

5 is a view for explaining a positional relationship between a phosphor layer and an electron beam of a color receiver tube having a stripe phosphor screen.

6 is a characteristic diagram showing the displacement amount of the electron beam when subjected to an impact by the length of the movable piece of the elastic member of the color water tube of the present invention.

7 is a characteristic diagram showing the change in the amount of mis-landing by the elapsed time of operation.

8 is an enlarged cross-sectional view of an essential part showing an example of a conventional color water pipe.

9A and 9B are enlarged cross-sectional views of the principal part of the description showing the structure and operation of suppressing thermal expansion of the shadow mask by the elastic member.

10A, B, and C are enlarged cross-sectional views of principal portions showing conventional color water tubes.

* Explanation of symbols for main parts of the drawings

1 panel 4: phosphor screen

7: shadow mask 8: mask frame

10, 20: stud pin 13, 33, 33 ₁ , 33 ₂ : elastic member

13a, 13a: support piece 13b, 13b: movable piece

33d: fixed attachment part

FIELD OF THE INVENTION The present invention relates to color water tubes, and more particularly to a support structure of a shadow mask.

In general, a color receiver tube is attached to a stud pin inserted into an inner wall of a substantially rectangular panel, and an electron beam is projected at a predetermined position on the phosphor screen on the inner surface of the panel by hanging the shadow mask. It is configured to be.

In such color receivers, for example, a slit-type shadow mask with a hole passing through a rectangular electron beam typically has an effective electron beam that passes through the drilled hole or less than 1/3, and the remaining electron beams are shadowed. It is projected onto the mask and sometimes heats up the shadow mask to around 80 ° C.

As a result, when the distance between the phosphor screen and the shadow mask (hereinafter referred to as the g value) changes and the change in the gap g becomes more than the allowable value, the electron beam does not accurately land on the stripe-shaped phosphor of the phosphor screen. So-called mislanding occurs, which reduces color purity.

To prevent this, as shown in Japanese Unexamined Patent Publication No. 44-3547, the mask frame is hung on the panel side wall with the bimetal interposed therebetween, and the entire shadow mask is moved in the direction of the phosphor screen to substantially allow the change of the g value. It's a way to keep it as far as it can go.

However, the method of using such a bimetal is complicated and the number of parts tends to reduce the precision in assembling. As a result, the color purity also tends to be lowered, resulting in high quality color receiving tubes.

As a complementary structure, there is a color water pipe, which is also proposed in Japanese Unexamined Patent Publication No. 48-4104.

For example, as shown in FIG. 8, a thin spring 13 is provided between the mask frame 8 and the stud pin 10 provided in the inner wall of the panel 1.

This can obtain satisfactory correction with regard to the heating of the shadow mask 7, and thus the support piece 13a and the support are fitted with the pin 10 at an angle α of approximately 45 degrees with the tube axis 14 of the vacuum outer container. It is to prevent mis-landing of the electron beam 5 by installing a thin spring 13 having a movable piece 13b extending from the piece 13a.

According to this proposal, the movable piece 13b of the thin spring 13 rotates around the stud pin 10 according to the thermal expansion of the shadow mask 7 and the shadow mask 7 moves in the direction of the phosphor screen 4. Slightly shifted to compensate for mislanding.

That is, as shown in FIGS. 9A and 9B, when the electron beam 5 starts to reach the shadow mask 7, the shadow mask 7 expands, and one point P thereon is an outward direction point from the tube axis 14. Try to displace at (P '). The electron beam 5 passing through the point P is shown by a broken line, but when the arrow P 'is moved, the landing position of the electron beam 5 changes, which causes color shift.

In order to compensate for the effects of this heat, with the expansion of the shadow mask 7, the position of the shadow mask 7 itself is moved toward the panel 1, and the point P coincides with the position of the point Q. The electron beam 5 passing through the point P reaches the phosphor precisely.

However, the slender spring 13 having such a shape fits the hole 13c provided in the support piece 13a to the pin 10 so as to move the support piece 13a in contact with the pin 10 so as to move the panel 1. It hangs on the inside).

As a result, when the colored water pipe is shocked or vibrated, the thin spring 13 moves in contact with the pin 10, or in the extreme case, the thin spring 13 is separated from the pin 10. It may become.

One way to prevent this is to increase the spring pressure of the thin spring 13.

However, this large spring pressure is transmitted on the panel glass by the pin 10, causing the glass to twist.

Therefore, there exists a possibility that a color water pipe may be damaged during the normal heat processing performed to the color water pipe at the time of manufacture.

In addition, in such a color receiving tube, when the shadow mask 7 is attached and detached (removed) in the panel 1, it is difficult to attach and detach it by a worker's hand. It is necessary to install in a process.

Further, when attaching and detaching, a large pressure is applied to the thin spring 13 or the mask frame 8 and the shadow mask 7 fixedly attached thereto, so that the mask frame 8 or the shadow mask 7 is deformed. There is also a concern.

On the other hand, Japanese Patent Application Laid-Open No. 57-53048 (US Patent No. 4,387,321 specification) has been proposed for such inconvenience.

This is done by attaching the shadow mask 7 at the corner of the panel 1 in such a way that it hangs over and has a flat elastic element 23 having one end connected to the shadow mask 7 as shown in FIGS. 10A, 10B and 10C. It is a colored water pipe hanging in a hanging state.

It is explained that such a color receiving tube can be made to attach and detach the shadow mask 7 easily, and can also prevent the occurrence of a skew.

However, with such a structure, the elastic element 23 is simply separated from the pin 20 even if there is a slight shock or vibration.

In order to prevent this, the member 24 and the plate 25 which connect the elastic element 23 and the pin 20 by, for example, glass enamel, cement, or various welding or pull the tensions as shown in 10b and 10c. It is also limited to constitute a limiting member for the movement of the flat elastic element 23 by.

However, when the elastic element 23 and the pin 20 are fixedly attached as in this conventional example, the panel 1 or the elastic element 23 may be fixed even if the color water pipe becomes defective due to other causes in the next step. It is impossible to reuse the entirety of the shadow mask system including.

On the other hand, in the case of using the tension member 24 or the plate 25, the number of parts required for one color water pipe and the assembly time thereof are increased so that the mass productivity is very weak. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and by reducing the mislanding of the electron beam sufficiently for a long time from the beginning of operation, the color purity such as color shift of the image is suppressed and the impact resistance is improved by a simple supporting material. The aim is to provide color-rich tubes with high productivity.

f/k

2.5의 관계가 성립되도록한 것을 특징으로 한다.That is, in the present invention, the elastic modulus K (kg.f / mm) of the elastic member and the elastic member are applied to the mask frame holding the shadow mask while being attached to the stud pins provided on the inner wall of the rectangular panel. 1.8 between force F (kg.f) on stud pin

f / k

Characterized in that the relationship of 2.5 is established.

Hereinafter, the Example of the color water pipe of this invention is described in detail. 2 is a cross-sectional view of a color water tube according to the present invention. That is, the vacuum outer container is comprised by the substantially rectangular panel 1, the exposed funnel 2, and the neck 3. As shown in FIG.

The inner surface of the panel 1 is formed with a phosphor screen 4 made of a stripe phosphor layer which emits red, green and blue light respectively, and the neck 3 is arranged in a line along the horizontal axis of the panel 1. And an so-called in-line electron gun 6 which emits three electron beams 5 corresponding to red, green, and blue is installed.

In addition, the mask frame 8 includes a shadow mask 7 in which a plurality of slit-shaped holes are arranged in the vertical direction at a position opposite to the phosphor screen 4 in the vertical direction. It is supported.

The mask frame 8 is supported by the pin 10 buried in the inner wall of the skirt portion of the panel 1 via the elastic member 33.

The three in-line array electron beams 5 are deflected by a deflector 12 external to the funnel 2, scan a rectangular range corresponding to the rectangular panel 1, and also provide a shadow mask 7 It is color-coded through the punctured hole of the film to land on the stripe phosphor layer and reproduce the color image.

In addition, the electron beam may not be landed correctly on the stripe-type fluorescent material layer under the influence of an external magnetic field such as a geomagnetic field, and strong magnetic properties inside the funnel 2 to prevent the color purity of the reproduced image from being impaired. A magnetic shield 11 made of a metal plate is hung through the frame 8. In addition, it will be described in detail using the main section enlarged cross-sectional view in FIG.

The shadow mask 7 is made of a cold rolled steel sheet having a thickness of 0.2 mm and its side wall is fixed to a mask frame 8 made of a cold rolled steel sheet having a thickness of about 1.6 mm.

Stud pins 10 are provided in the skirt frame 1a at the corners of the mask frame 8 and the rectangular panel 1, and an elastic member (between the mask frame 8 and the stud pins 10) is provided. 33) is installed.

가 45도가 되도록 형광체 스크린(4)쪽에 연장되어 있는 가동편(33b)과, 이 가동편(33b)에서 전술한 지지편(33a)과 대략 평행하도록 연장되어 있으며, 마스크 프레임(8)에 고정되게 부착된 고정부착편(33d)으로 되어 있다.The elastic member 33 has a hole 33c fitted with the stud pin 10, and a support piece 33a fitted with the stud pin 10 so as to conform to the direction of the tube axis 14 and the support piece ( Angle with the tube axis (13)

The movable piece 33b extending toward the phosphor screen 4 so that the angle is 45 degrees, and the movable piece 33b extends substantially parallel to the support piece 33a described above, and fixed to the mask frame 8. The fixed attachment piece 33d is attached.

In addition, the elastic member 33 has a length l 'of about 17 mm in the tubular direction of the support piece 33a, a width of about 15 mm, and a length in the direction in which the movable piece 33b extends. It is composed of a precipitation hardening type stainless steel having a width of about 15 mm crossed at right angles and a stainless steel, for example, SUS631 (Japanese Industrial Standard JIS: G4305).

로 되도록 설정되어 있다.The force F (kg.f) applied to the stud pin 10 when the elastic modulus K (kg.f / mm) of the elastic member 33 and the elastic member 33 are fitted to the stud pin 10. )

It is set to be.

In the 28-inch type 110 degree deflection color tube having such a structure, experiments were conducted on the amount of mis-landing of the electron beam due to mechanical impact and the difficulty of peeling and pasting in the panel of the shadow mask.

First, in the color receiving tube having such a structure, it was examined whether the amount of mis-landing of the electron beam was the greatest in any direction of impact, which was perpendicular to the tube axis and perpendicular to the longitudinal direction of the stripe-shaped phosphor. In general, it has been found that the impact in the direction parallel to the elongated side of the rectangular panel represents the most significant value.

In particular, it was also confirmed that the displacement amount of the electron beam was large in the center portion of the screen. That is, when the impact is applied to the direction indicated by the arrow 40 perpendicular to the elongated direction of the phosphor layer of the tube axis 14 and the phosphor screen 4 as shown in FIG. , The shadow mask 7 moves from right to left on the ground. That is, in the screen center part, the shadow mask moves from the point C to the point C ₁ and is displaced as indicated by the electron beam arrow 42a accordingly.

However, on the right side of the screen (right above the ground), when the impact member 40 is subjected to the impact 40, the elastic member 33 ₁ has a rotational motion around the part supported by the stud pin 10 as shown by the arrow 41a. As a result, the shadow mask 7 is moved away from the phosphor screen 4.

Accordingly, since the shadow mask 7 moves from the right side to the left side and at the same time from the bottom side when the impact mask 40 is subjected to the impact 40, the right peripheral portion on the ground side of the shadow mask 7 moves from the point R to the point R '. The electron beam 5 is also displaced as indicated by the arrow 42b.

On the other hand, on the left side of the screen (left to right on the ground), when the impact member 40 is subjected to the impact 40, the elastic member 33 ₂ is rotated like the arrow 41b due to its shape, and as a result, the shadow mask 7 is applied to the phosphor screen 4 as a result. Close.

Therefore, when the shadow mask 7 is subjected to the impact 40, the shadow mask 7 moves from the right side to the left side at the same time and from the top to the bottom, so that the shadow mask 7 moves from the point L to the point L '. The electron beam 5 is also displaced as indicated by arrow 42c.

However, the displacements 42b and 42c of the electron beams on the left and right of the screen are always smaller than the displacements 42a at the center of the screen.

That is, the movement from the bottom of the shadow mask 7 on the right side of the screen to the top and the movement of the shadow mask 7 on the left side of the screen from the top to the bottom together are the movement of the shadow mask 7 from the right to the left. This is a movement in a direction to cancel the displacement of the electron beam due to this, which is one feature of the color receiving tube as the present invention.

On the other hand, the magnitude of the impact is expressed by the impact acceleration, and 40 Gm / sec ² which is slightly larger than the value that is considered to be applied during the transportation and use of the ordinary color water pipe is assumed to be added.

Various experiments have been conducted to summarize such impacts, and FIGS. 4A, 4B, and 4C are also described below in detail with reference to FIG. 1.

That is, the horizontal axis is to be separated from the pin 10 by bending the support piece 33a and the movable piece 33b of the elastic member 33 of the elastic member 33 of FIG. 1 in the direction of the frame 8. The coefficient corresponding to the force required at time is shown. The vertical axis on the left represents the displacement amount δ (maximum value in the center of the screen) of the electron beam when the color tube is impacted, and corresponds to the characteristic curves (A), (B) and (C). When the elastic member 33 is fitted to the stud pin 10, the force F that the stud pin 10 receives from the elastic member 33, that is, the elastic member holds the shadow mask 7 and the frame 8. Forces are respectively represented and correspond to characteristic curves α, β, and γ.

Moreover, the elastic modulus K was changed by changing the substantial length l of the movable piece 33b of the elastic member 33, and the length l in each experiment was shown by the numerical value in the parenthesis on the horizontal axis of an angular surface.

4, 4b, and 4c are data when the thickness t of the elastic member 33 is 0.3 mm, 0.4 mm, and 0.5 mm, respectively.

로 표시되는 스터드핀(10)에 가해지는 힘 F가 감소된다.Then, in FIG. 4A, the length l of the movable piece 33b of the elastic member 33 is increased and the elastic modulus K is reduced.

The force F applied to the stud pin 10 is reduced.

As a result, the displacement amount δ (characteristic A) of the electron beam upon impact also increases, but the elastic modulus K is 0.75 (kg.f / mm) or less, for example, the length l of the movable piece 33b is 12 mm. When the impact was applied, two of the elastic members 33 disposed at the four corners of the panel 1 were separated from the stud pins 10, so that the shadow mask 7 fell on the phosphor screen to make the measurement possible. On the contrary, when the length l of the movable piece is made small and the elastic modulus K is made large, the force F applied to the stud pin 10 increases and the displacement amount δ of the electron beam becomes small. However, when the elastic modulus K is 2.75 (kg.f / mm) or more, for example, when the length l of the movable piece 33d is 5 mm, two of the four elastic members 33 are fitted with the stud pins 10. Although it is possible, the remaining two can not be attached by the operator's hand because the mechanical strength of the elastic member 33 is too strong, this also could not be measured.

In Fig. 4a, the point a ₂ is a detachable limit point, the value of the elastic modulus K at the point a is 2.75 (kg.f / mm), and the length l of the movable piece is 6 mm.

Next, FIG. 4B shows data when the elastic member 33 is composed of SUS 631 having a thickness of 0.4 mm. The characteristic curvature B corresponds to the displacement amount δ and β corresponds to the force F. FIG. When the elastic modulus K is 1.3 (kg.f / mm) or less, for example, the length l of the movable piece 33b is 15 mm, one of the elastic members 33 is separated from the stud pin 10 when impacted. The shadow mask 7 could not be correctly supported and measurement became impossible.

On the other hand, when the elastic modulus K is 4.7 (kg.f / mm) or more, for example, the length l of the movable piece 33b is 7 mm, two of the four elastic members 33 are fitted with the stud pins 10. Although the remaining two elastic members 33 could not be attached by the operator's hand, this also became impossible to measure.

Its point b ₂ in FIG. 4b is the limit point, the value of the elastic modulus K is 4.7 (kg.f / mm), and the length l of the movable piece is 8.0 mm.

In addition, FIG. 4C shows the force F (characteristic γ) applied to the stud pin 10 with respect to the elastic modulus K when the elastic member 33 is composed of SUS 631 having a thickness of 0.5 mm, and the electron beam displacement when subjected to an impact. Data representing δ (characteristic C).

In this case, even when the elastic modulus K is 1.6 (kg.f / mm), that is, the length l of the movable piece 33b is 13 mm, the elastic member 33 is not separated from the stud pin 10.

The amount of displacement of the electron beam upon impact was very large, about 168 µm.

On the contrary, when the length l of the movable piece was made small, the thickness of the member was 0.5 mm thick, the force F applied to the elastic modulus K and the stud pin 10 was also very large, and the mechanical strength as the elastic member was also very strong.

Therefore, when the elastic modulus K exceeds 7 (kg.f / mm), for example, when the length l of the movable piece 33b is 9 mm, all four elastic members 33 can be accurately fitted to the stud pin 10. There was no measurement.

The point C ₂ in FIG. 4C is a detachable limit point, the value of the elastic modulus K is 7 (kg.f / mm), and the length l of the movable piece is 10 mm.

As a result of the above experiment, it was found that the displacement of the electron beam when the color receiving tube was impacted had a constant system with the force F applied to the elastic modulus K of the elastic member 33 and the stud pin 10 corresponding thereto.

That is, when the elastic modulus K of the elastic member 33 is large and the force F applied by the elastic member 33 to the stud pin 10 is large, the supporting ability of the elastic member 33 is large and the support piece 33a due to impact And the deformation of the movable piece 33b are small, so that the amount of electron beam displacement at the time of an impact can be reduced.

On the contrary, when the force F applied to the elastic modulus K and the stud pin 10 decreases together, the support ability of the elastic member 33 is also weakened, and at the same time, the deformation of the support piece 33a and the movable piece 33b due to impact is also large. The amount of displacement of the electron beam when subjected to an impact increases.

Next, the extent to which the amount of displacement of the electron beam when subjected to impact was practically allowed was examined.

That is, a phosphor screen with a stripe phosphor layer generally has a phosphor layer 50 of width S ₂ and a light absorption band 51 of width D ₂ , for example, of graphite, which absorbs light on both sides thereof, as shown in FIG. Is provided, and the electron beam 52 having a width B ₂ is projected onto the phosphor layer 50 so as to span the light absorption bands 51 on both sides, thereby emitting a specific color.

Therefore, even if the electron beam 52 is displaced, the color purity does not deteriorate unless the phosphor layers 50-1 and 50-2 that emit other adjacent colors are emitted.

By the way, the maximum space | interval of the next green fluorescent substance layer adjacent to the phosphor space | interval in the center part of a screen, for example, a green phosphor layer, is currently about 810 micrometers in the color picture tube currently used.

When this is applied to each dimension in FIG. 5, the width B _S of the electron beam is about 210 μm, the width S _S of the fluorescent layer is about 170 μm, and the width D ₂ of the light absorption band is about 100 μm.

로 약 80㎛로 되며, 이값이 실용화되어 있는 컬러 수상관의 화면 중앙에 있어서의 최대 여유로 볼수가 있다.Therefore, the margin amounts G up to the phosphor layers 50-1 and 50-2, which emit different colors adjacent to the electron beam 52, G =

It becomes about 80 micrometers, and can be seen with the maximum allowance in the center of the screen of the color water pipe which this value is put to practical use.

That is, in general, a color receiver tube having a small outer diameter dimension or a smaller one of the phosphor layer spacing tends to have a smaller margin G accordingly, and when the margin amount is 80 µm or more, the color purity is weakened and the number of colors can be reduced. I cannot maintain dignity as a superior.

In contrast with the data of Figs. 4a, 4b, and 4c obtained by the present inventors from the experiments, each point of the characteristic (A) (B) (C) where the displacement amount δ of the electron beam is 80 µm (a ₁ of the elastic member 33 at the respective points (α ₁ ) (β ₁ ) (γ ₁ ) of the characteristics (α), (β), and (γ) corresponding to (b ₁ ) and (c ₁ ) The relationship between the elastic modulus K and the force F applied to the stud pin 10 is (F / K) _α1 = 2.50, (F / K) _β1 = 2.59 and (F / K) _γ1 = 2.66, respectively.

Therefore, when the pressure F applied to the elastic modulus K and the stud pin 10 is selected such that the F / K is 2.5 or less, it has been found that the electron beam displacement amount is 80 µm or less, which makes it practical.

On the other hand, another factor in which the present inventors judge practicality is whether or not the shadow mask is suspended in a panel, or conversely detached from the panel by a general worker. This is a fundamental factor in the industrial production of products.

In view of the data of FIGS. 4A, 4B, and 4C from this viewpoint, the relationship between the maximum elastic modulus K that can attach the elastic member 33 to the stud pin 10 and the force F applied to the stud pin 10 is The characteristics α, β, and γ are expressed as α2, β2 and γ2, respectively, so that F / K becomes (F / K) _α2 = 1.74, (F / K) _β2 = 1.8 and (F / K) _γ2 = 1.8 respectively. Is 1.8 or more, the shadow mask in the panel can be attached and detached by the operator's hand.

In addition, in order to obtain a more practical practical dimension of the elastic member 33, the length l of the movable piece 33b of the elastic member 33 is taken on the horizontal axis using the data shown in FIGS. 4A, 4B, and 4C, and the elastic member 33 FIG. 6 shows the thickness t of the movable piece as a parameter and the displacement amount δ of the electron beam when the longitudinal axis is impacted.

That is, the characteristics (A), (B), and (C) correspond to when t is 0.3 mm, 0.4 mm, and 0.5 mm, respectively.

In this figure, the relationship between the length l and the thickness t of the movable piece of the elastic member 33 at points a ₁ , b ₁ , and c ₁ at which the displacement amount of the electron beam becomes 80 μm when subjected to an impact in this drawing. Reading the values for points (a ₁ ), (b ₁ ), (c ₁ ) in FIG. 4 indicates that point (a ₁ ) is l = 10.29 and t = 0.3, and point (bl) is l = 12.4 and t = 0.4, and the point (c1) indicates that l = 15.1 and t = 0.5, so if you find l / t in relation, (l / t) a ₁ = 34.3, (l / t) b ₁ = 31.0, (1 / t) c ₁ = 30.2.

Therefore, when l / t is 30 or less, the displacement amount δ of the electron beam due to the impact becomes 80 µm or less, thereby obtaining a practical color picture tube.

On the other hand, the limit that the operator can attach and detach the elastic member 33 in the panel 1 by hand is indicated by the points (a ₂ ), (b ₂ ), and (c ₂ ) of each characteristic. The relationship between the length l and the thickness t of the movable piece 33b of the elastic member 33 indicates that each point a ₂ in FIGS. 4a, b, and c is l = 6.0 and t = 0.3, b ₂ ) represents l = 8.0 and t = 0.4, and point c2 represents l = 10.0 and t = 0.5, so from this we find the relation lt (lt) a ₂ = 20.0, (lt) b ₂ = 20.0, (lt) c ₂ = 20.0.

Therefore, if lt is 20 or more, the operator can attach and detach the shadow mask in the panel by hand.

Moreover, it goes without saying that the length l of the movable piece is substantially a light length on the diagonal of the screen.

As described above, according to the present invention, a color receiver tube having good workability and a small change amount of the electron beam with respect to impact is obtained, but the mislanding of the electron beam over a long time from the initial operation, which is another object of the present invention, is also achieved. Could be small enough.

This will be described according to FIGS. 7 and 1. FIG. 7 shows the results of experiments using a 28-inch 110-degree deflection, that is, a color picture tube in which each β between the tube axis 14 and the electron beam 5 has a stripe fluorescent layer of 55 degrees.

First, the structure of this color water tube is substantially the same as that shown in FIG. 11, and the side wall of the shadow mask 7 made of cold rolled steel with a thickness of about 0.2 mm has a mask frame of a cold rolled steel sheet having a plate thickness of about 0.5 mm. It is fixed to 8).

The stud pin 10 provided substantially perpendicular to the mask frame 8 and the four corner skirt portions 1a of the panel 1 has a thickness of 0.4 mm of precipitation hardening stainless steel, for example, an SUS 631 elastic member. (33) is fitted.

The elastic member 33 has a hole 33c fitted with the stud pin 10, which is substantially perpendicular to the extending direction of the stud pin and has a length l 'of 17 mm in the direction along the tube axis 14, There is a support piece 33a having a width of about 15 mm in the direction perpendicular to each other. And a movable piece extending from the support piece 33a, having a length l in this extending direction of about 12 mm, a width in a direction crossing at right angles thereof l is about 15 mm, and an angle α of the tube shaft 14 being 45 degrees ( 33b) and the fixed attachment piece 33d extended in the same direction substantially parallel to the support piece 33a in this movable piece 33b, and being fixed to the mask frame 8. As shown in FIG.

로 되도록 설정되어있다.Force F (kg.f) applied to the stud pin 10 when the elastic modulus K (kg.f / mm) of the elastic member 33 and the elastic member 33 are fitted to the stud pin 10. / mm)

It is set to be.

7 shows the elapsed time (minutes) of operation on the horizontal axis and the change in the displacement amount of the electron beam, that is, the non-landing amount, on the vertical axis.

The phosphor screen was measured by measuring the displacement of the electron beam at a point diagonally 330 mm away from the center of the screen when the above-mentioned color water tube was operated with a white screen having a normal high pressure of 25 KV and a beam current of 1400 uA. The direction moving away from the center to the horizontal direction was "positive" and the movement toward the center of the screen was made "part".

As shown in Japanese Patent Application No. 44-3547, characteristic A in FIG. 7 is a change of the conventional 28-inch, 110-degree deflecting color water pipe, which has a mask frame hooked to approximately the central wall of each rectangular panel side. Indicates.

On the other hand, characteristic B shows data in the case of the 28 inch 110 degree deflection color water tube by this invention mentioned above.

As apparent from Fig. 7, the characteristic B according to the embodiment of the present invention finds that the temporal change of the mislanding is significantly reduced with respect to the conventional characteristic A.

In addition, when the shadow mask is worn in four corners of the rectangular panel as in the present embodiment, the rigidity of the mask frame as the support frame is increased, and conversely, the mask frame can be made thinner than before.

In addition, when the thickness of the mask frame is 0.5mm as in the present embodiment, the weight is reduced by about 70% compared to 1.6mm.

In other words, the conventional 1.6mm weight is 1.6Kg, 0.5mm mask frame can be very light weight of about 0.5kg, and the weight reduction of the electron beam when the color receiving tube is impacted by the weight reduction. You may also

In fact, the 28-inch, 110-degree color water tube of the present embodiment was subjected to the impact test as described above, and the displacement amount of the electron beam at the center of the screen was 64 mu m.

This is about 10% improvement compared to the displacement amount of the electron beam when the material thickness of the mask frame is 1.6 mm, that is, 71 μm represented by the point z in FIG. 4B. The displacement of the beam can be suppressed.

It goes without saying that the electron beam displacement of 63 µm is generally a quality that is smaller than the limit of 80 µm of the electron beam displacement, which causes the color purity to be weak, and has no practical problem. Moreover, although an embodiment of the present invention has been described with respect to an elastic member having a support piece fitting at right angles to the stud pin and a movable piece extending from the support piece, the present invention is not limited to the shape of such an elastic member.

For example, as proposed in Japanese Patent Application Laid-Open No. 57-53048 shown in FIG. 10A (US Pat. No. 4,387,321), the same applies to the case of the flat elastic element 23 in which the support piece and the movable piece form the same plane. If present, it is apparent that the same effect is obtained as long as the relationship between the spring constant K and the force F applied to the stud pin satisfies the relationship of the present invention.

However, the length l of the movable piece 23a in this case is the distance between the boundary of the movable piece 23a and the fixed attachment piece 23b, and the point of fitting with the stud pin 20 closest to it.

In addition, in the present embodiment, the elastic member is fixedly attached to the mask frame and indirectly attached to the shadow mask, but the elastic member is fixedly attached to the shadow mask, but does not impair the effects of the present invention.

As described above, according to the present invention, the impact resistance can be improved without using a complicated bimetallic correction device, and the amount of mislanding can be remarkably reduced from the beginning of the operation for a long time, thereby resulting in color purity such as color shift and color unevenness. It is now possible to provide a color receiving tube suitable for very industrial mass production, which can effectively improve the weakening of the product.

Claims (2)

Substantially rectangular, by means of a panel with stud pins in the skirt portion of its corners, a phosphor screen formed on the inner surface of the panel, and an elastic member having holes for fitting with the stud pins described above so as to face the phosphor screen. In the color receiving tube composed of the shadow mask which is attached to the above-described stud pin, the elastic modulus of the elastic member is set to K (kg.f / mm) and the elastic member is inserted into the stud pin. When fitted, the force actually applied to the stud pins described above is F (Kg.f).

Color award hall, characterized in that the relationship is established when. The above-mentioned elastic member is provided with the support pin with the hole which fits with the stud pin mentioned above, and the movable piece extended from this support pin, The thickness of the movable piece mentioned above shall be t (mm), When the substantial length along the direction extending from the supporting piece of the movable piece described above is l (mm)

A color award building characterized in that a relationship is established.

Images