JPH052987A - Getter device - Google Patents

Abstract

PURPOSE:To suppress the costs for manufacturing a getter through perfect selection of the front and rear surfaces and to enhance the flashing effect by furnishing a flange protrusive at the end of the opening of a getter vessel; and eliminate risk of exfoliation and slipping-off of the getter material by enhancing the resistance against deformation of the vessel. CONSTITUTION:The vessel of a getter device is composed of an outer wall 1 and inner wall 2 having vertical surfaces and a bottom 3, wherein a flange 61 is provided protrusive outward relative to the vertical surface over that whole peripheral area of the outer wall 1 situated on the side opposite the bottom 3, and a getter material 5 is put fully in this vessel. Accordingly the vessel fed from a parts feeder can incline owing to this flange 61 but will hot tumble. and the vessel is left standing with its center of gravity positioned in the neighborhood of the bottom 3. Thereby it is easy and sure to make front-rear selection without dropping the getter material retaining force, getter powder compactness, and the vessel shaping property, and further the vessel is prevented from deformation and the getter material precluded from risk of exfoliation and slipping-off. Therein the protrusion amount of the flange 61 shall be 0.05-0.5 times as large as the height, while the longer/shorter side ratio of the vessel shall range 1:1 to 4:1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a getter device used for an electron tube or the like.

[0002]

2. Description of the Related Art A getter device is mounted in an electron tube in order to maintain the vacuum degree in the tube. The getter device types include an evaporation type getter device that uses evaporated Ba or Mg and Zr.
There is a non-evaporable getter device that heats and uses a metal such as Ti or Ti. With the widespread application of getter devices, the shape of the getter container is not limited to the conventional annular shape, but is also oval such as a track or an ellipse. This is because, for example, when it is used in a color cathode ray tube, a getter device having a large capacity is required in spite of the small neck diameter, and a getter device having a more appropriate shape was considered in accordance with the needs.

The manufacturing process of the getter device will be described in detail below.

The getter device can be obtained by the following steps.

First, a getter container is obtained by pressing a stainless thin plate with a press die. This getter container is washed with trichloroethylene or the like, and hydrogen treatment is further performed at a temperature of 900 to 1000 ° C. to complete the preparation of the getter container.

Next, the getter container is filled with getter powder,
In the crimping, the getter container is transferred and sorted by the parts feeder, inserted into the mold of the getter filling machine, and then the getter powder is evenly filled, and the getter device is obtained by pressurizing and pressing. The getter is generally produced continuously by a rotary getter filling machine, but the getter container must always be fed to the filling machine with the opening facing upward in order to store the getter powder.

Conventionally, for example, a track-shaped oval getter has a shape having an arc portion (R) and a straight portion (S) when viewed from a plane as shown in FIG. Fill getter powder into the U-shaped groove
It is crimped. In order to select the obverse and reverse sides of such an oval getter container, the getter container was erected vertically on a passage transferred by a parts feeder, and the getter container was turned upside down by using the deviation of the center of gravity of the getter container so that the opening was directed upward. However, the contact between the upright getter container and the parts feeder is a surface contact, so that the center of gravity of the getter container is in the contact surface even if it is slightly deviated in the bottom direction, and it has considerable stability.

In order to select the opening of the getter container in this state upward, the stability of the upright getter container is destroyed by the vibration of the parts feeder, and the fall of the center of gravity is promoted by the action of the center of gravity. Due to the presence and slight deviation, it may be 100 due to the influence of vibration of other getter containers.
It was difficult to obtain a front / back sort of%.

On the other hand, as a shape of the getter container for facilitating front / back sorting, a V-shaped cross section as shown in FIG. 5 may be considered, but the moldability of the getter container, the pressure bonding property of the getter powder, and the retention force of the getter agent. Is inferior to the U-shape, so it is difficult to put it into practical use.

Although the track-shaped oval getter device has been described above by way of example, the same applies to an elliptical or perfect circle, that is, an annular getter device.

[0011]

As described above, it has been difficult for the conventional getter device to easily and reliably perform front / back surface selection.

In view of the above problems, it is an object of the present invention to provide a getter device having a structure that facilitates front and back sorting in the getter device.

[0013]

A getter device according to the present invention comprises an outer wall having a vertical surface, an inner wall having a vertical surface and extending substantially parallel to the outer wall, the outer wall and the inner wall. In a getter device comprising a getter container formed of a bottom surface portion that closes one side of an open end formed between the getter container and a getter agent filled in the getter container, the bottom surface portion of the outer wall is It is characterized in that it has a flange projecting outward with respect to the vertical surface over the entire circumference of the opposite end.

At this time, if the protrusion amount of the brim from the vertical surface is in the range of 0.05 to 0.5 times the height of the vertical surface of the outer wall, it is formed on the outer wall. The flanged portion is suitable because it can sufficiently maintain the strength of the getter container. The amount of protrusion is 0.0 of the height of the vertical surface of the outer wall.
If it is less than 5 times, sufficient getter container strength cannot be obtained,
When it exceeds 0.5 times, the collar portion becomes too heavy and an extra force is applied to the boundary portion with the outer wall, which is not preferable.

Further, in the case where the inner wall has a brim projecting inward with respect to the vertical surface over the entire circumference of the end portion on the side opposite to the bottom surface portion, a more sufficient strength for the getter container. Can be given.

Further, if the ratio of the long diameter side to the short diameter side of the getter container is between 1: 1 and 4: 1, the flange portion is formed on the outer wall over the entire circumference, so that the strength of the getter container is sufficient. Yes preferred.

[0017]

By virtue of the above-mentioned constitution, it becomes possible to easily and surely perform front / back sorting without deteriorating the moldability of the getter container, the pressure bonding property of the getter powder, and the holding power of the getter agent.

[0018]

EXAMPLES Examples of the present invention will be described below.

FIG. 1 shows a getter device according to a first embodiment of the present invention.

The container of the getter device of the first embodiment comprises an outer wall (1) having a vertical surface, an inner wall (2) and a bottom part (3), and the bottom part (3) of the outer wall (1). ) And a flange (6
1). The getter agent (5) is filled in this container. The getter container transferred from the parts feeder is tilted by the protruding collar (61) as shown in FIG.
Designed to not fall. The getter device for a color cathode-ray tube is about 27 m on the major axis side (a) in the shape of FIG.
m, the minor diameter side (b) is about 14 mm, and the vertical height (h) of the outer wall is about 2.5 mm. In the getter container, the flange (61) protruding to the end of the outer wall is a getter container. The size is 0.3 mm so that the center of gravity of the getter container when it is self-supporting and is self-supporting is close to the bottom part (3) of the getter container. The dimension is preferably 0.05 to 0.5 times the vertical height (h) of the outer wall. Here, the major axis side (a) is about 27 mm,
The minor diameter side (b) was about 14 mm, but if the major diameter side (a) is up to about four times the minor diameter side (b), the strength of the getter device is improved by providing the collar portion. It is practical without causing problems such as deformation.

FIG. 3 shows a getter device according to a second embodiment of the present invention. In this embodiment, the collar (62) is also provided on the entire inner wall. In this case, as compared with the first embodiment, it is easier to make a getter container and it is easier to perform uniform heating,
It also has effects such as little thermal deformation.

[0022]

As described above in detail, by providing the projecting brim at the end of the opening of the getter container, the front side and the back side can be perfectly sorted, and the getter cost can be reduced and the getter can be flushed. In particular, the deformation resistance of the getter container, which is considered to be the effect of the brim, is improved, and the peeling and dropping of the getter agent are improved.

The shape of the brim projecting outward and inward is preferably right-angled with respect to the side wall, but needless to say, the function can be sufficiently fulfilled even if it is not necessarily right-angled.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a first embodiment of a getter device according to the present invention.

FIG. 2 is a diagram showing a state in which the getter device of the present invention is self-supporting.

FIG. 3 is a diagram illustrating a second embodiment of the getter device of the present invention.

FIG. 4 is a diagram illustrating a conventional getter device.

FIG. 5 is a diagram illustrating a conventional getter device.

[Explanation of symbols]

1 ... Outer wall 2 ... Inside wall 3 ... Bottom part 5 ... Getter agent 61,62 ... Tsuba

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 16, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

At this time, if the protrusion amount of the brim from the vertical surface is in the range of 0.05 to 0.5 times the height of the vertical surface of the outer wall, it is formed on the outer wall. The flanged portion is suitable because it can sufficiently maintain the strength of the getter container. The amount of protrusion is 0.0 of the height of the vertical surface of the outer wall.
If it is less than 5 times, sufficient getter container strength cannot be obtained,
When it exceeds 0.5 times, the collar portion becomes too heavy, and an extra force is applied to the boundary portion with the vertical surface , which is not preferable.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

FIG. 1 is a diagram illustrating a getter device according to a first embodiment of the present invention.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

FIG. 2 is a view showing a state in which the getter device of the first embodiment of the present invention is self-supporting.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

FIG. 3 is a diagram illustrating a getter device according to a second embodiment of the present invention.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

FIG. 5 is a diagram for explaining another conventional getter device.

Claims (5)

[Claims] 1. An outer wall having a vertical surface, an inner wall having a vertical surface and extending substantially parallel to the outer wall, and an opening end formed between the outer wall and the inner wall. In a getter device comprising a getter container consisting of a bottom part that closes the side, and a getter agent filled in the getter container, the vertical surface is provided over the entire circumference of the end of the outer wall opposite to the bottom part. On the other hand, a getter device having a flange protruding outward. 2. The amount of protrusion of the collar from the vertical surface is in the range of 0.05 to 0.5 times the height of the vertical surface of the outer wall. Getter device. 3. The getter device according to claim 1, wherein the getter container is inclined without falling when it stands upside down with the outer side of the outer wall facing down. 4. The collar according to claim 1, further comprising a collar projecting inwardly with respect to the vertical surface over an entire circumference of an end portion of the inner wall opposite to the bottom surface portion. Getter device. 5. The getter device according to claim 1, wherein the ratio of the long diameter side to the short diameter side of the getter container is between 1: 1 and 4: 1.