CN115144082A - Getter self-adaptive packaging structure and mounting method - Google Patents

Abstract

The invention relates to the technical field of infrared detector Dewar, in particular to a getter self-adaptive packaging structure and a mounting method, which comprises the following steps: a retaining ring, comprising: the annular part is provided with an opening, and two end parts are respectively formed at the opening of the annular part; the two connecting parts are respectively connected with one end of the two end parts of the annular part; the first leg part and the second leg part are respectively connected with the other ends of the two connecting parts; wherein the two end portions are arranged in an overlapping manner, or the two connecting portions are arranged in an overlapping manner, or the first leg portion and the second leg portion are arranged in an overlapping manner. The fixing ring is optimized into an elastic self-adaptive structure, so that the fixing ring can fix the getter more conveniently and firmly, and one end of the support sheet is optimized into an arc structure, so that the support sheet can be well matched with the limiting groove of the Dewar shell.

Description

Getter self-adaptive packaging structure and mounting method

Technical Field

The invention relates to the technical field of infrared detector dewars, in particular to a getter structure of a dewar and an installation method of the structure.

Background

In the research and manufacture of the existing refrigeration infrared detector, when the chip works in a Dewar cavity, a high vacuum environment is needed, the vacuum service life is an important index of product performance, and the high vacuum inside the Dewar cavity is usually realized and maintained by adopting a high vacuum exhaust and getter installation mode.

The omega-shaped fixing ring adopted in the prior art is usually processed by adopting a wire cutting mode, the elasticity is small, when the columnar getter is clamped by the omega-shaped fixing ring, the fixing ring needs to be slightly expanded and then fixed, and the fixing mode can not firmly fasten the getter; meanwhile, when the fixing ring and the L-shaped supporting sheet are fixed on the inner wall of the Dewar shell by direct spot welding, the fixing ring and the supporting sheet are easy to slide, cannot be positioned and are inconvenient to operate.

Disclosure of Invention

The invention also aims to provide a getter self-adaptive packaging structure and a mounting method, which solve the technical problems;

a retaining ring, comprising:

the annular part is provided with an opening, and two end parts are respectively formed at the opening of the annular part;

the two connecting parts are respectively connected with one end of the two end parts of the annular part; the first leg part and the second leg part are respectively connected with the other ends of the two connecting parts;

wherein, the two end parts are arranged in an overlapping way, or the two connecting parts are arranged in an overlapping way, or the first leg part and the second leg part are arranged in an overlapping way.

A getter adaptive packaging structure, comprising:

the inner side wall of the shell is provided with a first limiting groove;

the fixing ring is the fixing ring in the above content, and the first leg part and/or the second leg part of the fixing ring are/is arranged in the first limiting groove.

Preferably, wherein,

a second limiting groove is formed in the inner side wall of the shell;

further comprising: the support sheet comprises a fixing part and a support part which are connected with each other, the support sheet is L-shaped, and the fixing part of the support sheet is arranged in the second limiting groove.

Preferably, the first limiting groove and the second limiting groove are both annular, and the first limiting groove and the second limiting groove are arranged in parallel.

Preferably, the first leg portion and the second leg portion each have a curvature that is adapted to an inner side wall of the housing.

Preferably, the fixing portion has a curvature adapted to an inner wall of the housing.

Preferably, the cross section of the fixing ring is circular.

Preferably, the method further comprises the following steps:

the insulator is arranged on the inner side wall of the shell;

the getter is provided with a first getter electrode and a second getter electrode, wherein the first getter electrode is connected with the insulator, and the second getter electrode is connected with the supporting part of the supporting sheet.

Preferably, the getter is a cylindrical structure, and the axis of the getter is parallel to the axis of the housing.

A method for installing a getter adaptive packaging structure, which is suitable for the getter adaptive packaging structure, comprises the following steps:

step S1: providing a shell with a first limit groove and a second limit groove;

step S2: welding an insulator to a side wall of the housing;

s3, clamping a getter in the annular part of the fixing ring;

s4, fixing the first leg part and/or the second leg part of the fixing ring in the first limiting groove;

s5, fixing the fixing part of the support sheet to the second limiting groove;

and S6, welding the first getter electrode of the getter with the insulator, and welding the second getter electrode of the getter with the support sheet.

The invention has the beneficial effects that: by adopting the technical scheme, the fixing ring is optimized into the elastic self-adaptive structure, so that the getter can be fixed more conveniently and firmly, and meanwhile, the fixing ring and the supporting sheet can be accurately arranged in the limiting groove by arranging the limiting groove on the Dewar shell, thereby being beneficial to improving the welding yield, the product consistency and the reliability of the product.

Drawings

FIG. 1 is a schematic view of a retaining ring according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of a getter adaptive package structure in accordance with the present invention;

FIG. 3 is a schematic view of a support sheet according to an embodiment of the present invention;

fig. 4 is a process diagram of a method for mounting a getter adaptive package structure according to an embodiment of the present invention.

In the drawings: 1. a housing; 11. a first limit groove; 12. a second limit groove; 2. an insulator; 3. a getter; 31. a first getter electrode; 32. a second getter electrode; 4. a fixing ring; 41. an annular portion; 42. an end portion; 43. a connecting portion; 44. a first leg portion; 45. a second leg portion; 5. a support sheet; 51. a fixed part; 52. a support portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

A retaining ring, as shown in fig. 1, comprising:

a ring portion 41, the ring portion 41 having an opening, the ring portion 41 forming two end portions 42 at the opening;

two connecting portions 43, wherein the two connecting portions 43 are respectively connected with one end of the two end portions 42 of the annular portion 41;

a first leg part 44 and a second leg part 45, the first leg part 44 and the second leg part 45 being connected to the other ends of the two connecting parts 43, respectively;

wherein, the two end portions 42 are overlapped, or the two connecting portions 43 are overlapped, or the first leg portion 44 and the second leg portion 45 are overlapped; preferably, an omega-shaped fixing ring 4 with adjustable size is formed, so that the fixing mode of the fixing ring 4 is more convenient and firm.

Specifically, the fixing ring 4 has an elastically adaptive structure that exhibits an increase in the inner diameter of the annular portion 41 when the first leg portion 44 and the second leg portion 45 are pressed, and the fixing ring 4 contracts after being loosened.

A getter adaptive packaging structure, as shown in fig. 2, comprising:

the device comprises a shell 1, wherein a first limiting groove 11 is formed in the inner side wall of the shell 1;

the fixing ring 4, the fixing ring 4 being the fixing ring 4 in the above embodiment, the first leg portion 44 and/or the second leg portion 45 of the fixing ring 4 being disposed in the first limiting groove 11.

In a preferred embodiment of the present invention,

the inner side wall of the shell 1 is provided with a second limit groove 12;

as shown in fig. 3, the method further includes: the supporting sheet 5, the supporting sheet 5 includes a fixing portion 51 and a supporting portion 52 that are connected to each other, the supporting sheet 5 is L-shaped, and the fixing portion 51 of the supporting sheet 5 is disposed in the second limiting groove 12.

In a preferred embodiment, the first and second limiting grooves 11 and 12 are annular, and the first and second limiting grooves 11 and 12 are disposed in parallel.

In a preferred embodiment, the first leg portion 44 and the second leg portion 45 each have a curvature that matches the inside wall of the housing 1; the fixing ring 4 can be well fitted with the first limit groove 11.

Preferably, the fixing portion of the supporting sheet in the conventional art is a straight strip structure and is directly connected to the inner sidewall of the housing 1, so that the supporting sheet is easy to slide, in a preferred embodiment, the fixing portion 51 has a radian matched with the inner sidewall of the housing 1, so that the supporting sheet 5 is well matched with the second limiting groove 12, and specifically, the fixing portion 51 of the supporting sheet 5 is attached and fixed in the second limiting groove 12, so as to effectively fix the supporting sheet 5.

Furthermore, the first limiting groove 11 and the second limiting groove 12 are formed in the inner side wall of the shell 1, so that spot welding operation is convenient and fast, and consistency of products is guaranteed.

In a preferred embodiment, the cross-section of the fixing ring 4 is circular; preferably, the circular cross section can avoid the problem that the getter 3 is easily scratched by a fixing ring with a right-angle edge in the prior art when the getter 3 is clamped.

In a preferred embodiment, please continue to refer to fig. 2, which further includes:

at least one insulator 2, wherein the insulator 2 is arranged on the inner side wall of the shell 1; preferably, the insulator 2 is disposed through a sidewall of the housing 1 and directed toward an axis of the housing 1.

At least one getter 3, the getter 3 is fixed in the annular part 41 of the fixed ring 4, the getter 3 is provided with a first getter electrode 31 and a second getter electrode 32, wherein the first getter electrode 31 is connected with the insulator 2, and the second getter electrode 32 is connected with the supporting part 52 of the supporting plate 5; in particular, the fixed ring 4 is sized to fit the getter 3, and firmly retains the getter 3.

Specifically, the present embodiment is provided with two insulators 2 and two corresponding getters 3, and in other embodiments, different numbers of insulators 2 and getters 3 may be adopted according to needs.

In a preferred embodiment, the getter 3 is of cylindrical configuration, the axis of the getter 3 being parallel to the axis of the casing 1.

A method for installing a getter 3 adaptive packaging structure, which is suitable for the getter adaptive packaging structure in any embodiment, as shown in fig. 4, the method for installing comprises:

step S1: providing a shell 1 with a first limit groove 11 and a second limit groove 12;

step S2: welding the insulator 2 on the side wall of the shell 1;

s3, clamping the getter 3 in the annular part 41 of the fixing ring 4;

step S4, fixing the first leg part 44 and/or the second leg part 45 of the fixing ring 4 in the first limiting groove 11;

step S5, fixing the fixing part 51 of the support sheet 5 in the second limit groove 12;

and S6, welding the first getter electrode 31 of the getter 3 with the insulator 2, and welding the second getter electrode 32 of the getter 3 with the support sheet 5.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims (10)

1. A retaining ring, comprising:

the annular part is provided with an opening, and two end parts are respectively formed at the opening of the annular part;

the two connecting parts are respectively connected with one end of the two end parts of the annular part; the first leg part and the second leg part are respectively connected with the other ends of the two connecting parts;

wherein, the two end parts are arranged in an overlapping way, or the two connecting parts are arranged in an overlapping way, or the first leg part and the second leg part are arranged in an overlapping way.

2. A getter adaptive packaging structure, comprising:

the inner side wall of the shell is provided with a first limiting groove;

the fixing ring of claim 1, wherein the first leg portion and/or the second leg portion of the fixing ring are disposed in the first limiting groove.

3. The getter adaptive packaging structure according to claim 2,

a second limiting groove is formed in the inner side wall of the shell;

further comprising: the support sheet comprises a fixing part and a support part which are connected with each other, the support sheet is L-shaped, and the fixing part of the support sheet is arranged in the second limiting groove.

4. The self-adaptive packaging structure for the getter according to claim 3, wherein the first limiting groove and the second limiting groove are both annular, and the first limiting groove and the second limiting groove are arranged in parallel.

5. The getter adaptive package structure according to claim 2, wherein the first leg portion and the second leg portion each have a curvature adapted to an inner sidewall of the housing.

6. The adaptive package structure for the getter according to claim 3, wherein the fixing portion has a curvature adapted to an inner sidewall of the housing.

7. The adaptive getter packaging structure according to claim 2, wherein the cross section of the fixing ring is circular.

8. The getter adaptive packaging structure according to claim 3, further comprising:

the insulator is arranged on the inner side wall of the shell;

the getter is provided with a first getter electrode and a second getter electrode, wherein the first getter electrode is connected with the insulator, and the second getter electrode is connected with the supporting part of the supporting sheet.

9. The adaptive package structure of claim 8, wherein the getter is a cylindrical structure, and an axis of the getter is parallel to an axis of the housing.

10. A method for mounting a getter adaptive packaging structure, which is suitable for use in a getter adaptive packaging structure according to any one of claims 2 to 9, the method comprising:

step S1: providing a shell with a first limit groove and a second limit groove;

step S2: welding insulators on the side wall of the shell;

s3, clamping a getter in the annular part of the fixing ring;

s4, fixing the first leg part and/or the second leg part of the fixing ring in the first limiting groove;

s5, fixing the fixing part of the supporting sheet to the second limiting groove;

and S6, welding the first getter electrode of the getter with the insulator, and welding the second getter electrode of the getter with the support sheet.

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