CN1319109C - Flat glass cone for CRT - Google Patents
Flat glass cone for CRT Download PDFInfo
- Publication number
- CN1319109C CN1319109C CNB2005100073376A CN200510007337A CN1319109C CN 1319109 C CN1319109 C CN 1319109C CN B2005100073376 A CNB2005100073376 A CN B2005100073376A CN 200510007337 A CN200510007337 A CN 200510007337A CN 1319109 C CN1319109 C CN 1319109C
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- CN
- China
- Prior art keywords
- flat glass
- glass cone
- cone
- rectangular aperture
- glass
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The present invention relates to a flat glass cone for a CRT. The present invention comprises a main body part, a tube diameter part and a deflecting coil part positioned between the main body part and the tube diameter part, wherein One end of the main body part has a rectangular opening end, and the other end of the main body part is connected with the deflecting coil part. The tube diameter part is connected to the free end of the deflecting coil part in a sealing way, and the main body part of the flat glass cone is composed of a trochiformis part which is smoothly connected by an arc part, and four arc face parts. The trochiformis part is formed by the roatation around a central axis by a curve. The curvature radius of each point on the curve is larger (4H<2>+D<2>/8H), and the curvature radiuses are not equal to each other. The curvature radiuses can be equal to each other when the curvature radius of each point on the curve is infinite. According to the present invention, the size along the depth direction of the glass cone and the weight of the glass cone can be evident, and the stress in the glass cone can not be exquisitely increased. The glass cone has sufficient vacuum resistant strength, and the reliability of the present invention in use are enhanced.
Description
Technical field
The present invention relates to the bulb for cathode-ray tube production field, more specifically, relate to the flat glass cone of the bulb for cathode-ray tube that is used for television set and display.
Background technology
Traditional bulb for cathode-ray tube as shown in Figure 1, it is to be made of cone portion and neck two parts, its shape resemble one the band rectangular opening funnel.With the segmentation of glass awl, then as shown in Figure 1, position corresponding to deflecting coil is called deflecting coil part 1, it links to each other with neck 4, along this deflecting coil part is main part 2 downwards, the downside rectangular aperture end of this main part is sealing-in border area 3, and main part 2 is by this sealing-in border area 3 and the sealing-in of glass screen.
In recent years, along with the appearance of various image display apparatus such as PDP, LCD, representing image display device to develop to ultra-thin and lightweight direction.What conventional cathode ray tube had becomes serious obstruction on the conventional cathode ray tube road for development than great depth degree and big weight.Shorten the longitudinal degree of cathode ray tube and weight reduction and make the glass bulb flattening become the conventional cathode ray tube urgent problem.
Realize the flattening of cathode ray tube, the glass awl structurally exists very big space, that is to say, the flattening of glass awl occupies bigger leading role in the flattening of whole cathode ray tube.In the prior art, increasing deflection angle is a kind of flattening mode of traditional, the simplest glass awl, yet, along with the increase of deflection angle, in the longitudinal degree that shortens the glass awl, the asymmetry of glass wimble structure can be aggravated, and the intensity of glass awl reduces, thus at the more strain energy of distortion of the inner generation of glass awl, cause the maximum tensile stress in sealing-in border area also to become big gradually, or even increase exponentially, thereby may substantially exceed the true fracture strength that glass is bored, reduced the coefficient of safety of glass awl.So the longitudinal degree that shortens the glass awl in the mode that increases deflection angle in the prior art has existed very large limitation.The increase of stress in the glass awl must increase the wall thickness of glass awl, has so just increased the weight that glass is bored inevitably.
How to obtain a kind ofly neither to increase the weight of glass awl weight (being glass awl thickness), can bear destructive intensity and realize the glass wimble structure of flattening again, be the long-term problem demanding prompt solutions of those skilled in the art always.
Summary of the invention
The object of the present invention is to provide and a kind ofly can reduce glass awl longitudinal size and glass awl weight but can acutely not increase the flat glass cone that is used for cathode ray tube of stress in the glass awl.
According to the present invention, a kind of flat glass cone that is used for cathode ray tube is provided, comprise main part, caliber part and the deflecting coil part between main part and caliber part, described main part has the rectangular aperture end at the one end, the other end of described main part partly is connected with deflecting coil, described caliber part is connected the free end of described deflecting coil part hermetically, and the main part of described flat glass cone partly is made of coniform part and four arcwall faces by the smooth connection of circular arc portion; This coniform part is to be rotated around central shaft by a curve to form, and the radius of curvature of the every bit on the wherein said curve is all greater than (4H
2+ D
2)/8H and all unequal, in the formula, D is the maximum gauge of the rectangular aperture end of glass awl, H is the height of the reference line of glass awl.
According to flat glass cone of the present invention, the asymmetrical type main body of traditional glass awl can be become the symmetric form main body, the glass awl is reduced on its longitudinal degree greatly, simultaneously corresponding glass awl weight also reduces greatly.In addition, stress transfer on the glass awl main part on the highly firm main part near on the diagonal axis on sealing-in limit, improve the stretch-proof stress of glass awl sealing-in limit part, made the glass awl have sufficient vacuum-resistant intensity, improved its safety in utilization and reliability.
Description of drawings
Fig. 1 is the schematic diagram that conventional cathode ray tube is bored with glass in the prior art;
Fig. 2 is the forward schematic diagram of conical flat glass cone of the present invention;
Fig. 3 is the stereogram of conical flat glass cone of the present invention;
Fig. 4 is the generalized section that is used to make the mould of the conical flat glass cone of the present invention.
Embodiment
Fig. 1 shows the schematic diagram of traditional glass bulb for cathode-ray tube, wherein corresponding deflecting coil position is a deflecting coil part 1, it links to each other with tube neck 4, along deflecting coil part 1 is main part 2 downwards, the rectangular aperture end of main part 2 downsides is a sealing-in limit portion 3, by sealing-in limit portion 3 and the sealing-in of glass screen.
With reference to Fig. 3, show the flat glass cone that is used for cathode ray tube of the present invention, wherein corresponding deflecting coil position is a deflecting coil part 1, the free end and the tube neck 4 of this deflecting coil part are tightly connected, along deflecting coil part 1 is the main part of funneling downwards, wherein main part is made of coniform part 2 and four arcwall face parts 3, this coniform part 2 and arcwall face part 3 both by 5 smooth connections of circular arc portion.
Shown in Fig. 2 and 3, a side of four arcwall face parts 3 and coniform part 2 be by circular arc portion 5 smooth connections, opposite side form jointly a general rectangular openend, be the sealing-in limit of glass awl.In the present invention, the mark to size has carried out as giving a definition:
Angle [alpha] is the normal direction angulation on arcwall face part 3 and plane, rectangular aperture end place;
Wall thickness T H is the wall thickness of glass awl;
The maximum dimension D of rectangular aperture end is cornerwise length of glass awl rectangular aperture end;
The maximum height Ha of arcwall face part constitutes glass to bore the maximum height that the arcwall face part of main part is counted from plane, rectangular aperture end place, and the mid point that just constitutes the circular arc of arcwall face part is bored the distance on plane, place, sealing-in limit to glass;
The diameter d 2 of tip circle is the formed diameter of a circle of deflector and main part junction of glass awl;
Reference line diameter of a circle d1 is glass awl plane, reference line place and the formed diameter of a circle of glass awl deflector;
Tip circle height β is half of glass awl deflection angle; H is the distance of plane, tip circle place to glass awl plane, place, sealing-in limit;
The reference line height H of glass awl is the distance of glass awl plane, reference line place to glass awl plane, place, sealing-in limit, and it satisfies relational expression H=h+ (d2-d1) ctg (β)/2.
Shown in Fig. 2 and 3, the normal direction on this arcwall face part 3 and plane, the rectangular aperture end place α that has a certain degree, the span of this angle [alpha] is 0 °≤α＜90 °.Preferably, the arcwall face part 3 that constitutes this main part is along extending and intersect with circular arc portion 5 and to form towards this flat glass cone other end with the direction of the angled α of normal direction on this plane, rectangular aperture end place from the outline line of rectangular aperture end.Preferably, the span of arcwall face part 3 and the normal direction angulation α on plane, rectangular aperture end place is 15 °≤α＜45 °.
Preferably, the relation between the maximum dimension D (mm) of the wall thickness T H (mm) of glass awl and glass awl rectangular aperture end satisfies relational expression: 2mm≤TH≤D/4.If the thickness of glass awl is less than 2mm, the insufficient strength of glass awl then.And if the thickness of glass awl is blocked up, then glass awl quality is too heavy, and waste material increases moulding cooling time, and machining stresses such as thermal stress are difficult for eliminating.
In addition, satisfy relational expression: Ha/H≤0.5 between the reference line height H (mm) that the maximum height Ha (mm) counted from plane, rectangular aperture end place of the arcwall face part 3 that constitutes glass awl main part and this glass are bored.If the maximum height Ha (mm) that arcwall face part 3 is counted from plane, rectangular aperture end place bores reference line height H (mm) half greater than glass, then shortened the coniform part in the glass awl main part, increased the height of arcwall face, also just increase the overall height of glass awl, do not realized flattening.
According to the present invention, the coniform part that constitutes glass awl main part is to be rotated around central axis by a curve as bus to form, and the radius of curvature of the every bit on this curve is all greater than (4H
2+ D
2)/8H, and all unequal, have only when the radius of curvature of the every bit on this curve all is infinity and could equate.Help under the situation that does not increase glass awl overall height, increasing the circular cone drift angle of glass awl like this.In addition, also be convenient to adjust the stress distribution of glass awl main part, increase the anti-vacuum strength of glass awl.
The value of circular cone vertex angle theta that constitutes the coniform part of flat glass cone main part has determined the flattening degree of glass awl, and according to the present invention, the span of circular cone vertex angle theta is 90 °≤θ≤180 °.If this circular cone drift angle is too little, then do not realize the flattening requirement of glass awl.
According to the preferred embodiments of the invention, referring to shown in Figure 2, the relation between the maximum height Ha (mm) that the radius R (mm) of the circular arc portion 5 of described coniform part 2 of smooth connection and arcwall face part 3 and this arcwall face part 3 are counted from plane, described rectangular aperture end place is 3mm≤R＜Ha.If R is too small, be easy to generate the stress concentration phenomenon.And if R 〉=Ha then can reduce arcwall face height partly, weaken of the supporting role of arcwall face part to glass awl main part, can cause the curvature at glass awl place, diagonal angle to reduce in addition, the vacuum stress that bears reduces, and the intensity that causes glass to bore reduces.
Following table 1 shows the preferred embodiment of glass awl of the present invention and bores the stress ratio of comparative example when having identical glass awl reference line height, rectangular aperture end maximum gauge and glass awl wall thickness with traditional glass.As can be seen, by adopting the present invention, the maximum stress that produces in the glass awl main part and the maximum stress on sealing-in limit all have significant decline.
Table 1
| Embodiment 1 | Comparative example | |
| The wall thickness T H (mm) of glass awl | 10.3 | 10.3 |
| The maximum dimension D of rectangular aperture end (mm) | 718.9 | 718.9 |
| The reference line height H (mm) of glass awl | 110.5 | 110.5 |
| The maximum stress that produces in the main part (Mpa) | 15.26 | 20.71 |
| Sealing-in limit maximum stress (Mpa) | 8.65 | 11.78 |
Conical flat glass cone of the present invention is formed by mould molding.With reference to Fig. 6, die set is made up of punch 1, die 2 and mould circle 3 three parts, and punch is used for the negative camber of moulding glass awl, and die is used for the positive camber of moulding glass awl, and the mould circle is used for the sealing-in limit part of moulding glass awl.The molding mode of glass awl is: the glass solution of the fusion form with gob is splashed in the open containers that is made of die, mould circle, and punch descends with certain speed then, the glass gob in the Extruding die.Along with punch constantly descends, glass gob constantly flows to the direction of mould circle along punch and die surface, and after to a certain degree, punch stops to descend, at this moment the full die cavity that is formed by punch, die and mould circle of glass gob complete filling.Carry out pressurize subsequently, during pressurize, the cooling duct and the low ambient temperature of the cooling system of punch inside, die outside cool off the glass awl together, are frozen into the glass awl up to glass gob, and so complete glass awl finishes with regard to moulding.In addition, because the glass awl is in forming process, very big distortion has taken place and has crossed over huge temperature difference in the glass gob that constitutes the glass awl, can have bigger thermal stress and distortional stress in the glass awl, so after moulding is finished, still need the glass awl is carried out the stress relief annealing operation.
According to the present invention, the main part of glass awl partly is made of coniform part and four arcwall faces, coniform part has realized that the asymmetrical type main body with traditional glass awl is the symmetric form main body, ambassador's glass awl that adds of coniform part drift angle reduces on its longitudinal degree greatly, and simultaneously corresponding glass awl weight also reduces greatly.In addition, arcwall face partly make stress transfer on the glass awl main body on the highly firm main part near on the diagonal axis on sealing-in limit, improved the stretch-proof stress of glass awl sealing-in limit part.
According to glass awl of the present invention, significantly the glass awl can not increase the stress in the glass awl simultaneously tempestuously along the size of longitudinal degree direction and the weight of glass awl, makes the glass awl have sufficient vacuum-resistant intensity, has improved its safety in utilization and reliability.
In addition, flat glass cone of the present invention can be general with the deflecting coil that uses in the present television set, can utilize the size of existing picture tube that deflecting coil is set, and need not carry out the design of new deflecting coil.Utilize this glass awl can save cost, accelerate the listing of new product, reduced the cycle of new product development.
Claims (7)
1. flat glass cone that is used for cathode ray tube, comprise main part, caliber part and the deflecting coil part between main part and caliber part, described main part has the rectangular aperture end at the one end, the other end of described main part partly is connected with deflecting coil, described caliber part is connected the free end of described deflecting coil part hermetically, and the main part of described flat glass cone partly is made of coniform part and four arcwall faces by the smooth connection of circular arc portion; This coniform part is to be rotated around central shaft by a curve to form, and the radius of curvature of the every bit on the wherein said curve is all greater than (4H
2+ D
2)/8H and all unequal, in the formula, D is the maximum gauge of the rectangular aperture end of glass awl, H is the height of the reference line of glass awl.
2. the described flat glass cone that is used for cathode ray tube of claim 1, it is characterized in that, the arcwall face that constitutes described flat glass cone main part partly is to extend and form to the other end of this flat glass cone angledly with the normal direction on this plane, rectangular aperture end place from the outline line edge that constitutes the rectangular aperture end, the normal direction on this arcwall face part and plane, rectangular aperture end place is α at angle, and the span of this angle is 0 °≤α＜90 °.
3. the described flat glass cone that is used for cathode ray tube of claim 2 is characterized in that, the span of described arcwall face part and the normal direction angulation α on plane, described rectangular aperture end place is 15 °≤α＜45 °.
4. each described flat glass cone that is used for cathode ray tube in the claim 1 to 3 is characterized in that, the span of circular cone vertex angle theta that constitutes the coniform part of described flat glass cone main part is 90 °≤θ≤180 °.
5. each described flat glass cone that is used for cathode ray tube in the claim 1 to 3, it is characterized in that the relation between the maximum height Ha that the radius R of the described circular arc portion of the described coniform part of smooth connection and arcwall face part and this arcwall face are partly counted from plane, described rectangular aperture end place is 3mm≤R＜Ha.
6. each described flat glass cone that is used for cathode ray tube in the claim 1 to 3, it is characterized in that the relation between the maximum height Ha that the arcwall face part that constitutes described flat glass cone main part is counted from plane, described rectangular aperture end place and the reference line height H of described flat glass cone is Ha/H≤0.5.
7. each described flat glass cone that is used for cathode ray tube in the claim 1 to 3 is characterized in that the relation between the maximum dimension D of the wall thickness T H of described flat glass cone and described rectangular aperture end satisfies 2mm≤TH≤D/4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100073376A CN1319109C (en) | 2005-02-06 | 2005-02-06 | Flat glass cone for CRT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100073376A CN1319109C (en) | 2005-02-06 | 2005-02-06 | Flat glass cone for CRT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632904A CN1632904A (en) | 2005-06-29 |
| CN1319109C true CN1319109C (en) | 2007-05-30 |
Family
ID=34853091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100073376A Expired - Fee Related CN1319109C (en) | 2005-02-06 | 2005-02-06 | Flat glass cone for CRT |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1319109C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000133170A (en) * | 1998-10-29 | 2000-05-12 | Nippon Electric Glass Co Ltd | Funnel-and-neck sealing body |
| CN1255727A (en) * | 1998-11-16 | 2000-06-07 | 三星电管株式会社 | Cathode ray tube |
| US6392336B1 (en) * | 1998-10-06 | 2002-05-21 | Asahi Glass Company Ltd. | Glass funnel for a cathode ray tube and cathode ray tube |
-
2005
- 2005-02-06 CN CNB2005100073376A patent/CN1319109C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6392336B1 (en) * | 1998-10-06 | 2002-05-21 | Asahi Glass Company Ltd. | Glass funnel for a cathode ray tube and cathode ray tube |
| JP2000133170A (en) * | 1998-10-29 | 2000-05-12 | Nippon Electric Glass Co Ltd | Funnel-and-neck sealing body |
| CN1255727A (en) * | 1998-11-16 | 2000-06-07 | 三星电管株式会社 | Cathode ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1632904A (en) | 2005-06-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070530 Termination date: 20120206 |