Getter adaptive packaging structure and installation method

Abstract

The present invention relates to the field of infrared detector dewar technology, and specifically provides an adsorbent adaptive packaging structure and installation method, including: a fixing ring, including: an annular portion, the annular portion having an opening, the annular portion forming two end portions at the opening; two connecting portions, the two connecting portions being respectively connected to one end of the two end portions of the annular portion; a first support leg and a second support leg, the first support leg and the second support leg being respectively connected to the other end of the two connecting portions; wherein the two end portions are arranged to overlap, or the two connecting portions are arranged to overlap, or the first support leg and the second support leg are arranged to overlap. The present invention optimizes the fixing ring into an elastic adaptive structure, making it more convenient and firm to fix the adsorbent, and optimizes one end of the support plate into an arc structure, so that it can cooperate well with the limiting groove of the dewar shell.

Description

Technical Field

[0001] The invention relates to the technical field of infrared detector dewars, in particular to a getter structure of a dewar and a method for installing the structure. Background Art

[0002] In the current research and manufacturing of cooled infrared detectors, a high vacuum environment is required when the chip works in the Dewar cavity. Vacuum life is an important indicator of product performance. High vacuum exhaust and the installation of getters are usually used to achieve and maintain high vacuum inside the Dewar cavity.

[0003] The "Ω"-shaped fixing ring used in the prior art is usually processed by wire cutting and has low elasticity. When using it to clamp the columnar getter, the fixing ring needs to be slightly expanded before being fixed. This fixing method cannot firmly fasten the getter. At the same time, when the fixing ring and the "L"-shaped support piece are usually directly spot-welded on the inner wall of the Dewar shell, the fixing ring and the support piece are easy to slide, cannot be positioned, and are inconvenient to operate. Summary of the Invention

[0004] The present invention also aims to provide a getter adaptive packaging structure and installation method to solve the above technical problems;

[0005] A fixing ring, comprising:

[0006] an annular portion, the annular portion having an opening, the annular portion forming two end portions at the opening;

[0007] Two connecting portions, each of the connecting portions being connected to one end of each of the two ends of the annular portion; a first supporting leg and a second supporting leg, each of the first supporting leg and the second supporting leg being connected to the other end of each of the connecting portions;

[0008] The two end portions are overlapped, or the two connecting portions are overlapped, or the first supporting leg and the second supporting leg are overlapped.

[0009] A getter adaptive packaging structure, comprising:

[0010] A housing, wherein an inner side wall of the housing is provided with a first limiting groove;

[0011] The fixing ring is the fixing ring described above, and the first supporting leg and / or the second supporting leg of the fixing ring are arranged in the first limiting groove.

[0012] Preferably, wherein

[0013] The inner side wall of the shell is provided with a second limiting groove;

[0014] It also includes: a supporting piece, the supporting piece includes a fixing portion and a supporting portion connected to each other, the supporting piece is L-shaped, and the fixing portion of the supporting piece is arranged in the second limiting groove.

[0015] 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.

[0016] Preferably, the first supporting leg and the second supporting leg both have a curvature that matches the inner side wall of the shell.

[0017] Preferably, the fixing portion has a curvature that matches the inner side wall of the shell.

[0018] Preferably, the cross section of the fixing ring is circular.

[0019] Preferably, it also includes:

[0020] at least one insulator, the insulator being disposed on the inner side wall of the housing;

[0021] At least one getter is fixed in the annular portion of the fixing ring, and the getter has a first getter electrode and a second getter electrode, wherein the first getter electrode is connected to the insulator, and the second getter electrode is connected to the supporting portion of the supporting sheet.

[0022] Preferably, the getter is a cylindrical structure, and the axis of the getter is parallel to the axis of the shell.

[0023] A method for installing a getter adaptive packaging structure, characterized in that it is applicable to the getter adaptive packaging structure, and the installation method comprises:

[0024] Step S1: providing a housing having a first limiting groove and a second limiting groove;

[0025] Step S2: welding the insulator to the side wall of the housing;

[0026] Step S3, clamping the getter into the annular portion of the fixing ring;

[0027] Step S4, fixing the first support leg and / or the second support leg of the fixing ring to the first limiting groove;

[0028] Step S5, fixing the fixing portion of the support sheet to the second limiting groove;

[0029] Step S6: welding the first getter electrode of the getter to the insulator, and welding the second getter electrode of the getter to the support sheet.

[0030] Beneficial effects of the present invention: Due to the adoption of the above technical solution, the present invention optimizes the fixing ring into an elastic adaptive structure, making it more convenient and firm to fix the getter. At the same time, a limiting groove is provided on the Dewar shell, so that the fixing ring and the support plate can be accurately installed in the limiting groove, which is beneficial to improving the welding yield, product consistency and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of a fixing ring in an embodiment of the present invention;

[0032] Figure 2 A cross-sectional view of a getter adaptive packaging structure according to an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of a support sheet in an embodiment of the present invention;

[0034] Figure 4 1 is a step diagram of a method for installing a getter adaptive packaging structure in an embodiment of the present invention.

[0035] In the accompanying drawings: 1. outer shell; 11. first limiting groove; 12. second limiting groove; 2. insulator; 3. getter; 31. first getter electrode; 32. second getter electrode; 4. fixing ring; 41. annular portion; 42. end portion; 43. connecting portion; 44. first support leg; 45. second support leg; 5. supporting plate; 51. fixing portion; 52. supporting portion. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0039] A retaining ring, such as Figure 1 Shown, including:

[0040] an annular portion 41 having an opening, and forming two end portions 42 at the opening;

[0041] Two connecting portions 43, the two connecting portions 43 are respectively connected to one end of the two end portions 42 of the annular portion 41;

[0042] a first supporting leg 44 and a second supporting leg 45, wherein the first supporting leg 44 and the second supporting leg 45 are respectively connected to the other ends of the two connecting portions 43;

[0043] Among them, the two end portions 42 are overlapped, or the two connecting portions 43 are overlapped, or the first support leg 44 and the second support leg 45 are overlapped; preferably, an "Ω"-shaped fixing ring 4 with adjustable size is formed to ensure that the fixing method of the fixing ring 4 is more convenient and firm.

[0044] Specifically, the fixing ring 4 has an elastic adaptive structure, which is manifested in that the inner diameter of the annular portion 41 increases when the first leg 44 and the second leg 45 are squeezed, and the fixing ring 4 contracts after being relaxed.

[0045] A getter adaptive packaging structure, such as Figure 2 As shown, including:

[0046] The housing 1 has a first limiting groove 11 formed on its inner side wall;

[0047] The fixing ring 4 is the fixing ring 4 in the above embodiment, and the first supporting leg 44 and / or the second supporting leg 45 of the fixing ring 4 is arranged in the first limiting groove 11 .

[0048] In a preferred embodiment,

[0049] The inner side wall of the housing 1 is provided with a second limiting groove 12;

[0050] like Figure 3 As shown, it also includes: a support piece 5, the support piece 5 includes a fixing portion 51 and a supporting portion 52 connected to each other, the support piece 5 is L-shaped, and the fixing portion 51 of the support piece 5 is arranged in the second limiting groove 12.

[0051] In a preferred embodiment, the first limiting groove 11 and the second limiting groove 12 are both annular, and the first limiting groove 11 and the second limiting groove 12 are arranged in parallel.

[0052] In a preferred embodiment, the first support leg 44 and the second support leg 45 both have an arc that matches the inner wall of the housing 1 , so that the fixing ring 4 can be well matched with the first limiting groove 11 .

[0053] Preferably, in the conventional technology, the fixing portion of the support sheet is a straight strip structure and is directly connected to the inner wall of the outer shell 1, causing the support sheet to slide easily. In a preferred embodiment, the fixing portion 51 has an arc that matches the inner wall of the outer shell 1, so that the support sheet 5 can cooperate well with the second limiting groove 12. Specifically, the fixing portion 51 of the support sheet 5 is fitted and fixed in the second limiting groove 12, thereby effectively fixing the support sheet 5.

[0054] Furthermore, providing the first limiting groove 11 and the second limiting groove 12 on the inner side wall of the housing 1 can also make the spot welding operation more convenient and ensure product consistency.

[0055] In a preferred embodiment, the cross section of the fixing ring 4 is circular; preferably, its circular cross section can avoid the problem in the conventional technology that the fixing ring with right-angled edges easily scratches the getter 3 when clamping the getter 3 .

[0056] In a preferred embodiment, please continue to refer to Figure 2 As shown, it also includes:

[0057] At least one insulator 2 is provided on the inner wall of the housing 1 ; preferably, the insulator 2 passes through the side wall of the housing 1 and is provided pointing to the axis of the housing 1 .

[0058] At least one getter 3 is fixed in the annular portion 41 of the fixing ring 4. The getter 3 includes a first getter electrode 31 and a second getter electrode 32. The first getter electrode 31 is connected to the insulator 2, and the second getter electrode 32 is connected to the support portion 52 of the support sheet 5. Specifically, the size of the fixing ring 4 is adapted to the getter 3 and can firmly clamp the getter 3.

[0059] Specifically, this embodiment is provided with two insulators 2 and two corresponding getters 3. In other embodiments, different numbers of insulators 2 and getters 3 may be used as needed.

[0060] In a preferred embodiment, the getter 3 is a cylindrical structure, and the axis of the getter 3 is parallel to the axis of the housing 1 .

[0061] A method for installing a getter 3 adaptive packaging structure is applicable to the getter adaptive packaging structure in any embodiment, such as Figure 4 As shown, the installation method includes:

[0062] Step S1: providing a housing 1 having a first limiting groove 11 and a second limiting groove 12;

[0063] Step S2: welding the insulator 2 to the side wall of the housing 1;

[0064] Step S3, clamping the getter 3 into the annular portion 41 of the fixing ring 4;

[0065] Step S4, fixing the first leg 44 and / or the second leg 45 of the fixing ring 4 to the first limiting groove 11;

[0066] Step S5, fixing the fixing portion 51 of the supporting piece 5 to the second limiting groove 12;

[0067] Step S6 , welding the first getter electrode 31 of the getter 3 to the insulator 2 , and welding the second getter electrode 32 of the getter 3 to the support sheet 5 .

[0068] The above description is only a preferred embodiment of the present invention and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixing ring, characterized in that: include: an annular portion, the annular portion having an opening, the annular portion forming two end portions at the opening; Two connecting portions, each of the connecting portions being connected to one end of each of the two ends of the annular portion; a first supporting leg and a second supporting leg, each of the first supporting leg and the second supporting leg being connected to the other end of each of the connecting portions; Among them, the two end portions are overlapped, or the two connecting portions are overlapped, or the first support leg and the second support leg are overlapped, and the fixing ring is an elastic adaptive structure. When the first support leg and the second support leg are squeezed, the inner diameter of the annular portion increases, and the fixing ring is tightened after relaxation.

2. A getter adaptive packaging structure, characterized in that: include: A housing, wherein an inner side wall of the housing is provided with a first limiting groove; The fixing ring is the fixing ring described in claim 1, and the first supporting leg and / or the second supporting leg of the fixing ring are arranged in the first limiting groove.

3. The getter adaptive packaging structure according to claim 2, characterized in that: The inner side wall of the shell is provided with a second limiting groove; It also includes: a supporting piece, the supporting piece includes a fixing portion and a supporting portion connected to each other, the supporting piece is L-shaped, and the fixing portion of the supporting piece is arranged in the second limiting groove.

4. The getter adaptive packaging structure according to claim 3, characterized in that: 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 packaging structure according to claim 2, characterized in that: The first supporting leg and the second supporting leg both have a curvature adapted to the inner side wall of the shell.

6. The getter adaptive packaging structure according to claim 3, characterized in that: The fixing portion has a curvature that matches the inner side wall of the shell.

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

8. The getter adaptive packaging structure according to claim 3, characterized in that: Also includes: at least one insulator, the insulator being disposed on the inner side wall of the housing; At least one getter is fixed in the annular portion of the fixing ring, and the getter has a first getter electrode and a second getter electrode, wherein the first getter electrode is connected to the insulator, and the second getter electrode is connected to the supporting portion of the supporting sheet.

9. The getter adaptive packaging structure according to claim 8, characterized in that: The getter is a cylindrical structure, and the axis of the getter is parallel to the axis of the shell.

10. A method for installing a getter adaptive packaging structure, characterized in that: The getter adaptive packaging structure according to any one of claims 2 to 9, wherein the installation method comprises: Step S1: providing a housing having a first limiting groove and a second limiting groove; Step S2: welding the insulator to the side wall of the housing; Step S3, clamping the getter into the annular portion of the fixing ring; Step S4, fixing the first support leg and / or the second support leg of the fixing ring to the first limiting groove; Step S5, fixing the fixing portion of the support sheet to the second limiting groove; Step S6: welding the first getter electrode of the getter to the insulator, and welding the second getter electrode of the getter to the support sheet.

Images