KR200147993Y1 - Device of inserting spacer in the beading jig of the crt - Google Patents

Abstract

The present invention discloses a novel apparatus for injecting a spacer onto an electrode in a bidding jig of an electron gun.

The device is designed to horizontally insert the spacer supported and guided to the support block, with a recess and a spring pin corresponding to each other in the spacer and the support block to be placed on the electrode in the state that the tip is lifted up to be seated on the electrode surface This prevented interference with the electrode due to sag and the like.

Description

Spacer input device of electron gun bead jig

1 is a side view showing a general configuration of an electron gun.

2 is an exploded side view showing the configuration of a conventional bidding jig.

3 is a perspective view showing a conventional electrode and spacer assembly process.

Figure 4 is an exploded side view showing the configuration of the bidding jig of the applicant of the same applicant.

5 and 6 are schematic cross-sectional views showing the configuration of the spacer input device of the present applicant also applied to the same person.

Figure 7 is a schematic cross-sectional view showing the configuration of the spacer inserting apparatus of the present invention.

8 is a sequential cross sectional view showing its operation.

* Explanation of symbols for main parts of the drawings

G: electrode 251: spacer

253: support block 254: guide groove

257: recess recess 258: spring-pin

The present invention relates to the manufacture of an electron gun of a CRT, and more particularly, to an apparatus for putting a spacer into a beading jig for temporarily holding an electrode.

An electron gun which emits an electron beam for emitting a fluorescent surface is provided with a plurality of electrodes (G; G1; G2,...) That focus and accelerate the hot electrons emitted from a cathode (K) as shown in FIG. 1. ) Are arranged at predetermined intervals, respectively.

In order to support the plurality of electrodes G at predetermined intervals, bead glass B is used, which is pressed by the outside of the electrodes G in a softened state by heating and thus enters the plurality of electrodes G. G) are combined into one electron gun assembly.

At the top of the combined electron gun assembly, a convergence cup (C) is bonded to the final electrode to prevent penetration of the deflection magnetic field, and a stem having a stem pin (P) and an exhaust pipe (X) at the bottom thereof. ; T) is combined.

Here, the stem pin P is bonded to each of the electrodes G and the bead glass B directly with the lugs L embedded with the electrode G or through a ribbon R. At the same time it is electrically connected to support the electron gun.

As described above, a process of assembling the electron gun integrally by combining the bead glass B is referred to as a beading process. In this beading process, the electrodes G are aligned at a predetermined interval and temporarily suspended. The device for fixing is a biding jig.

2 shows the configuration of the bidding jig most commonly used for the assembly of an in-line type color gun. The bidding jig is divided into an upper jig 3 and a lower jig 4, and the lower jig 4 has two supporting rods 42 for coupling with the upper jig 3, and an electrode G therebetween. Three assembly rods G are provided in which the spacers S are inserted alternately with the spacers S.

On the other hand, the upper jig 3 is provided with a substrate 31 into which the upper part of the supporting rod 42 of the lower jig 4 is inserted into the coupling holes 31a on both sides. A protrusion 421 protrudes from the upper side of the support bar 42 to insert and rotate the fixing cap 32 having the slot 32a to move the substrate 31 of the upper jig 3 to the lower jig 4. It is locked to the assembly rod (42).

On the other hand, the two extension rods 36 into which the pressure springs 36a are inserted are extended upwards, so that both ends of the pressure block 33 are coupled to the two extension rods 36, and the extension rods 36 are formed. A pressing cam 37 with a handle 37a is hinged between the two ends of the end.

On the other hand, the lug support part 34 is installed below the substrate 31, and the three cathode support bars 35a constituting the cathode support part 35 extend upwards, and the spring 35c and the operation handle 35b) is installed.

In the conventional bidding jig, the electrodes G; G1, G2, ... are inserted into the assembly rod 44 of the lower jig 4 alternately with the spacer S from the final electrode.

Meanwhile, the lug L is coupled to the lug support part 34 of the upper jig 1 and the cathode K is inserted into the cathode support part 35, and then the upper jig 3 is placed on the lower jig 4. Put on.

Then, the tip of the supporting rod 42 of the lower jig 4 protrudes upward through the coupling hole 31a of the substrate 31 of the upper jig 3. At this time, the projection 421 is covered with the fixing cap 32. The upper and lower jigs 3 and 4 are integrally engaged by the slots 32a of the fixing cap 32.

Then, by operating the operation handle 35b of the cathode support rod 35a up and down to adjust the relative position between the cathode K and the electrode G, pressurizing by rotating the pressure cam 37 by turning the handle 37a. The block 33 descends and the three cathode support rods 35a are elastically pressed to complete the assembly of the bidding jig.

In addition, in the conventional bidding jig, since the electrode G and the spacer S are alternately inserted into the assembly rod 44 in the lower jig 4, the insertion of the bidding jig is cumbersome and after completion of the bidding, Difficult to separate

In addition, since the cathode support part 35 does not completely fix the cathode K in the upper jig 3, the cathode K is detached well when the upper jig 3 is placed on the lower jig 4, so that a great care is taken. In addition, the coupling of the upper and lower jig (3,4) is also very troublesome because it is configured to rotate after the fixing cap 32 to match the projection 421 position.

In addition, the maintenance of the assembled state of the electrodes (G) is also a hassle to rotate the pressure cam 37.

In addition, the upper jig (3) has a large number of protrusions above and below the substrate (31) can not stand or fixed independently can not proceed even manual assembly without a separate jig.

In short, although the conventional bidding jig has a very complicated configuration, the assembling work of the electrode and the like is very cumbersome, and in particular, the automation of the electron gun assembly is impossible at all.

Accordingly, the applicant has developed a biding jig of an electron gun as shown in FIG. 4 and filed the same as the present application (patent application number later revised).

The beading jig has a locking rod 23 and a guide rod 23 extending from the substrate 21 of the lower jig 2 where the assembly rod 24 into which the electrode G is to be inserted is installed. Is coupled to the sleeve 12 provided on both sides of the substrate 11 of the upper jig 1 by the weight of the upper jig 1 and locked by the locking unit 16. On the other hand, the pressure plate 13 having the lug support part 14 and the cathode support part 15 at the lower side thereof is guided to the sleeve 12 at both ends to be elastically supported by the substrate 11 of the upper jig 1, and the lower jig The spacer support part 25 is provided in the guide rod 23 of (2) (refer the correspondence application for the remainder details).

In order to solve such a problem of the conventional spacer assembly method, the present applicant filed the spacer inserting device of the electron gun bead jig as shown in Figures 5 and 6 as the same (utility model registration application number later revised) have.

The input device is provided with a plurality of spacers 251 in the support block 253 provided on the outer periphery of the guide rod 23 of the lower jig 2 at required intervals, and the electrode G is inserted into the assembly rod 24. After the 251 is inserted one by one in the horizontal direction, when the coupling of the electron gun is completed by the bead glass B indentation, the spacers 251 are separated at once.

Such a spacer input device is easy to insert and remove the spacer 251 and has various advantages suitable for automation.

However, since the spacer 251 has a relatively long length in this configuration, and the spacer tip 252 at the tip thereof has a thin thickness depending on the distance of the electrode G, the electrode G is in contact with the horizontal direction when it is pushed in the horizontal direction. There is a risk of interference. This problem is not a big problem in manual work, but it can be a cause of failure in the construction of the automation line.

Accordingly, an object of the present invention is to provide a spacer inserting device whose tip does not interfere with the electrode when the spacer enters.

Spacer input device according to the present invention for achieving the above object, characterized in that the insertion groove of the predetermined length is formed on the lower surface of the body of the spacer and the spring-pin is installed on the corresponding guide surface of the support block.

According to this configuration, because the inlet groove has to pass over the spring pin during the movement of the spacer, its tip is lifted up, and when it passes through the spring pin, it falls back horizontally and lies on the electrode surface.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 7, the spacer 251 horizontally supported and guided to the guide groove 254 of the support block 253 is formed with a recessed groove 257 having a predetermined length in a lower portion thereof according to the present invention. The counterpart of 253 is provided with a spring pin 258 consisting of a ball 259 and a spring 260.

Here, the relative position between the length of the inlet groove 257 and the spring pin 258 is the middle of the retraction (separation) stroke and the forward (input) stroke of the spacer 251 is the spring pin (258). It is set to meet with).

Accordingly, when the spacer 251 is pushed toward the electrode G side, the inlet groove 257 meets the spring pin 258 and the tip of the spacer 251 is lifted up as shown in FIG. 8 (a). .

After the inlet groove 257 of the spacer 251 passes through the spring pin 258, the spacer 251 is returned to the horizontal state again as shown in FIG. 8 (b) and is seated on the electrode G.

Accordingly, since the spacer 251 does not cause interference with the electrode G when the spacer 251 is inserted, damage does not occur in the spacer 251 or the electrode G, and thus does not cause any problem in implementing the automation line.

Claims (1)

In the device for horizontally introducing a spacer guided to the guide groove of the support block on the electrode inserted into the assembly rod of the bidding jig, an inlet groove 257 is formed on the bottom surface of the spacer 251, the support block 253 is provided with a spring pin (258) selectively caught in the inlet groove (257) spacer inserting apparatus of the electron gun bead jig.