CN1055256A

CN1055256A - Sealing apparatus for electron gun of cathode ray tube

Info

Publication number: CN1055256A
Application number: CN91101528A
Authority: CN
Inventors: 朴武夫
Original assignee: Samsung Electron Devices Co Ltd
Current assignee: Samsung SDI Co Ltd
Priority date: 1990-03-24
Filing date: 1991-03-09
Publication date: 1991-10-09
Also published as: KR910017344U; GB9104669D0; GB2243019A; KR920004303Y1

Abstract

Sealing apparatus for electron gun of cathode ray tube comprises the heater of framework, support bar, band nozzle.Checkout gear detects the cathode ray tube size, makes nozzle ejection go out different flames through regulating; Fuel and oxygen line all have main feed and send pipeline and subsidiary conduit, and are connected to the nozzle of heater, so that by control device control fuel and Oxygen Flow.

Description

Sealing apparatus for electron gun of cathode ray tube

The present invention relates to a kind of electron gun load module is sealed to sealing apparatus for electron gun on the CRT neck regularly.

Usually, electron gun sealed sealing apparatus to CRT neck is constituted as follows.The framework that loads cathode ray tube rotatably is installed on the top edge of a circular dividing table.So when circular dividing table rotated, the cathode ray tube that is installed on the framework also rotated.Around circular dividing table, lay some heaters corresponding to the minute of angle of circular dividing table, they and circular dividing table be a preset distance at interval, is used for the CRT neck and the stem stem sealing-in mutually of inserting the electron gun load module in the neck regularly that are contained on the framework.The heater that sealing-in is used utilizes flame incrementally the heat of setting to be applied on the stem stem.

Because this sealing apparatus provides the stem stem of electron gun load module that heat fixes ground seal glass system and the neck of cathode ray tube, the heat that is added to cathode ray tube in each respective stage changes along with the residing corresponding indexing position of cathode ray tube of circular dividing table loading, bursts because of heating and cooling rapidly with the parts that prevent cathode ray tube.As mentioned above, the state that is added to the flame of on the cathode ray tube neck and indexing position associated cathode ray tube is one of key factor of decision cathode ray tube quality.

The structure of conventional sealing apparatus will describe in detail as follows.As shown in Figure 1, the framework 13 that loads cathode ray tube rotatably is installed to the edge of the circular dividing table 11 that angle in accordance with regulations turns over.With reference to figure 2A, heater is placed near cathode ray tube, with the neck 1a of sealing-in with the cathode ray tube 1 of framework 13 rotations.Become two pairs of whole nozzles 16 to be placed in the both sides of the neck 1a of cathode ray tube 1 with heater, to spray heat supply flame.Shown in Fig. 2 B, these nozzles 16 jointly are connected to fuel supply pipe 16c and oxygen supply pipe 16d.Therefore, nozzle 16 is designed to spray sealing-in flame with fixation pressure, like this, with nozzle 16 can only a kind of size of sealing-in CRT electrom gun.This just is not suitable for carrying out the sealing-in work to the cathode ray tube of different size compatiblely.In addition because nozzle 16 all the time with the fixation pressure jet flames no matter be loaded in the situation of the cathode ray tube on the framework 13, therefore just wasted fuel.

The present invention will overcome the above-mentioned shortcoming in the routine techniques.

Therefore, the purpose of this invention is to provide a kind of sealing apparatus of CRT electrom gun, make this equipment can carry out the damage of cathode ray tube in the sealing-in work of the cathode ray tube of different size, fuel saving consumption and the minimizing sealing-in process.

In order to reach this target, a kind of sealing apparatus of CRT electrom gun is provided, it comprises the circular dividing table that periodically turns over predetermined angular; Be installed in the circular dividing table edge, be used for loading a plurality of frameworks of cathode ray tube; Be arranged at a plurality of support bars under the framework, that be used for supporting the electron gun load module in the insertion cathode ray tube; And have a plurality of nozzles and come a plurality of heaters of sealing-in CRT neck part with jet flames, the flame that these nozzle ejection are different is to heat the neck of the cathode ray tube of two or more size by the heat supply value of regulating flame; This equipment also comprises:

Be connected respectively to a plurality of compound supply of fuel pipeline of the nozzle of heater, they have the trunk line of feed fuel and oxygen and the fuel of presenting and the amount of oxygen subsidiary conduit littler than trunk line feed quantity;

Be installed in a plurality of valve gears on trunk line and the subsidiary conduit respectively, be used for closing and opening the flow of fuel and oxygen line and control fuel and oxygen;

Near the checkout gear that the circular dividing table path circumscribed is settled, be loaded in the size of the cathode ray tube on the framework with detection; And

Be used for controlling the control device of closing and opening of the above-mentioned valve gear that is installed on the supply line, the signal that it detects in response to above-mentioned detection device is regulated the size by the flame of nozzle ejection.

Fig. 1 is the perspective view that is used for the conventional sealing apparatus major part of CRT electrom gun;

Fig. 2 A is an end view, has shown the nozzle of sealing apparatus shown in Figure 1 and the relative position relation of the electron gun that inserts CRT neck;

Fig. 2 B is a horizontal sectional view, has shown the nozzle of sealing apparatus shown in Figure 1 and the relative position relation of the electron gun that inserts CRT neck;

Fig. 3 is the perspective view that is used for the sealing apparatus major part of CRT electrom gun according to of the present invention; And

Fig. 4 has shown the situation that is connected of nozzle with supply of fuel pipeline according to the sealing apparatus that is used for CRT electrom gun of the present invention shown in Figure 3.

Description is described most preferred embodiment of the present invention in detail.

As shown in Figure 3, a plurality of frameworks 13 that are used for loading cathode ray tube are rotatably installed in the edge of circular dividing table 11 in spaced mode regularly.Here, only illustrate a framework, make to demonstrate detailed condition.Steady arm 12 is positioned under the framework 13, is used for supporting being inserted into the electron gun load module 2 in the neck of cathode ray tube 1.Settle a plurality of heaters around circular dividing table 11, be used for fusing the neck 1a that is loaded in the cathode ray tube 1 on the framework 13 with sealing-in.Shown in Fig. 3 and 4, heater comprise round CRT neck 1a, with neck with isolated two the relative nozzles 15 of preset distance and 15, and two

relative nozzles

16 and 16, also have round circular dividing table 11

eyelid retractor

14a and 14b that settle, that be used for support nozzle.Four nozzles are paired, the first pair of

nozzle

15 and 15, the second pairs of

nozzles

16 and 16 are settled toward each other, and the gas (being fuel and oxygen) of the different amounts of burning makes energy fuse the neck of cathode ray tube with the heat of regulation according to the size that is contained in the cathode ray tube 1 on the framework 13.These nozzles are connected to a pair of supply of

fuel pipeline

15a and 16a respectively to 15,15 and 16,16, and a pair of oxygen line 15b and 16b.Supply of

fuel pipeline

15a and 16a and

oxygen supply line

15b and 16b branch into

trunk line

15c, 16c, 15d and 16d respectively to present relatively large fuel and oxygen.Branch into subsidiary conduit 15c ', 16c ', 15d ' and 16d ' simultaneously, in a small amount fuel and oxygen are provided.Trunk

line

15c, 16c, 15d and 16d and subsidiary conduit 15c ', 16c ', 15d ' and 16d ' dispose electromagnetically operated valve S1a, S2a, S3a and S4a respectively to open and close these supply lines; And be equipped with hand control valve S1b, S2b, S3b and S4b respectively and preestablish the gas flow that flows through each bar pipeline.Be installed in

trunk line

15c, 16c, 15d and 16d and electromagnetically operated valve S1a, S2a, S3a and S4a on subsidiary conduit 15c ', 16c ', 15d ' and 16d ', that be used for the control gaseous supply are connected to (not shown) on the control device, their are according to being loaded in the size of the cathode ray tube on the framework and being operated selectively.Control device is linked (not shown) on the checkout gear of locating setting around circular dividing table, and receives the relevant detection signal of size of the cathode ray tube that loads with circular dividing table 11.

The work of the sealing apparatus for electron gun of cathode ray tube of the present invention that constitutes by aforementioned manner will be described below.

In the starting stage of work, in the

oxygen line

15b and 16b of first and second nozzles of settling regularly around circular dividing table 11 with support bar 14 15 and 16, control device cuts out all electromagnetically operated valve S1a and S3a of each

bar trunk line

15c, 16c, 15d and 16d, and open electromagnetically operated valve S2a and the S4a of each bar subsidiary conduit 15c ', 16c ', 15d ' and 16d ' simultaneously, make and from each

nozzle

15,15 and 16,16, eject the countersunk head flame that is in standby condition, be i.e. pilot flame.

Eject under the condition that is in the pilot flame under the standby condition at first and

second nozzles

15 and 16, if cathode ray tube 1 and the electron gun load module 2 that will insert cathode ray tube 1 are loaded by framework 13 and supported and when periodically turning over predetermined angular with circular dividing table 11 by the support bar under the framework 12, the checkout gear that carries on the line at element detects the state of loading member and the size of cathode ray tube 1, gives control device thereby send detection signal.

Control device for the nozzle that two couple who is regulated flame size by fuel supply control valve respectively settles relatively, is handled the wherein electromagnetically operated valve of a pair of nozzle in response to the signal that checkout gear produced.Thereby selected this just ejects powerful flame to nozzle in the nozzle that is in the pilot flame under the standby condition by ejecting, and makes the neck of cathode ray tube and the stem stem of the electron gun load module in the neck of packing into seal securely.

In more detail, for example, if the powerful flame of the selected injection of the first nozzle controlled device, being connected to the supply of fuel pipeline 15a of first nozzle 15 and each subsidiary conduit 15c ' of oxygen line 15b and the electromagnetically operated valve S4a of the middle installation of 15d ' just is closed, and the electromagnetically operated valve S3a that installs in each

trunk line

15c and 15d just is opened, and sprays the flame of the neck 1a through regulating, be enough to heated cathode ray tube 1.

Therefore, first nozzle 15 ejects flame and fixes the ground sealing-in by circular dividing table 11 periodically the neck part 1a of the cathode ray tube 1 of delivery and the stem stem of electron gun load module 2.

Simultaneously, second nozzle 16 continues to keep injection to be in the pilot flame of standby condition and not spray powerful flame.Subsequently, if loaded the cathode ray tube and the electron gun load module of another different size on the framework, the electromagnetically operated valve S3a that installs among corresponding trunk line 15c that checkout gear and control device are just closed at supply of fuel pipeline 15a that is connected to first nozzle 15 and oxygen line 15b and the 15d, and open electromagnetically operated valve S4a among subsidiary conduit 15c ' and the 15d '.This can make

first nozzle

15 and 15 pilot flames that eject under the standby condition, the jet flames and

second nozzle

16 and 16 is subjected to according to the such control of aforesaid operating procedure, make heat be enough to the neck and the electron gun load module of heated cathode ray tube, thereby the neck of cathode ray tube and electron gun load module are sealed.

Because the advantage of sealing apparatus for electron gun of cathode ray tube of the present invention is, it can regulate nozzle according to the size of cathode ray tube, thereby sealing-in electron gun selectively, so just can carry out the sealing-in of CRT electrom gun compatiblely, and then, the defect rate of fuel consumption and cathode ray tube is reduced greatly, and the result has improved productivity ratio.

Claims

1, a kind of sealing apparatus of CRT electrom gun comprises the circular dividing table 11 that periodically turns over predetermined angular; Be installed in above-mentioned circular dividing table 11 edges, be used for loading a plurality of frameworks 13 of cathode ray tube 1; Be positioned under the said frame, be used for supporting a plurality of support bars 12 of the electron gun load module 2 of inserting cathode ray tube 1; And a plurality of heaters that a plurality of nozzles 15,15,16 and 16 are arranged, be used for the neck part 1a of jet flames with sealing-in cathode ray tube 1; It is characterized in that:

Said nozzle 15,15,16 can eject different flame with 16, thereby heats the CRT neck 1a of two or more size by the heat supply value of regulating flame, and this sealing apparatus also comprises:

Be connected respectively to the nozzle 15,15,16 of above-mentioned heater and 16 a plurality of supply of fuel pipeline 15a and 16a and a plurality of oxygen line 15b and 16b, they have trunk line 15c, 16c, 15d and the 16d of feed fuel and oxygen, and fuel of presenting and amount of oxygen subsidiary conduit 15c ', 16c ', 15d ' and the 16d ' littler than above-mentioned trunk line 15c, 16c, 15d and 16d feed quantity;

Be installed in trunk line 15c, 16c, 15d and the 16d of said nozzle 15,15,16 and 16 and a plurality of valve gear S1a, S2a, S3a and the S4a among subsidiary conduit 15c ', 16c ', 15d ' and the 16d ' respectively, be used for closing and open above-mentioned hybrid fuel supply line 15a, 16a, 15b and 16b, and the flow of control fuel and oxygen;

Near the checkout gear that the path circumscribed of circular dividing table 11 is settled, be used for detecting the size of the cathode ray tube 1 that is loaded on the said frame 13; And

Control device, be used for controlling the open and close situation that is installed in above-mentioned valving S1a, S2a, S3a and S4a on the above-mentioned supply line, to regulate size in response to the detected signal of above-mentioned detection device by said nozzle 15,15,16 and 16 flames that spray.