Optical fiber ring packaging device

Abstract

The utility model discloses an optical fiber ring packaging device, which comprises a packaging cover, an optical fiber ring and a packaging base, the packaging base is provided with an annular cavity, and the optical fiber ring is accommodated in the annular cavity. The packaging cover and the packaging base are connected in a matched mode to form a magnetic shielding face. The outer side joint and the inner side joint of the packaging cover and the packaging base are welded through laser. The laser direction is perpendicular to the magnetic shielding surface. According to the utility model, when the high-precision optical fiber ring is packaged and welded, the welding seam still has an anti-magnetic shielding function, and the magnetic field performance of the optical fiber ring is improved.

Description

Technical Field

[0001] The utility model relates to the field of optical fiber loops, and particularly relates to an optical fiber loop encapsulation device. Background Art

[0002] Magnetic field performance has always been one of the key indicators in the engineering of fiber optic gyroscopes. Among the components of a fiber optic gyroscope, the influence factor of the optical fiber loop on the magnetic field performance of the fiber optic gyroscope can reach 100%. Once the optical fiber loop is fabricated, its magnetic susceptibility is fixed. Therefore, improving the magnetic field performance of the optical fiber loop has always been the research focus in the field of fiber optic gyroscopes.

[0003] The optical fiber loop encapsulation device includes an encapsulation cover, an optical fiber loop, and an encapsulation base. When encapsulating existing high-precision optical fiber loops, due to the need to reduce volume and weight, a laser welding process is usually used to weld the gap between the encapsulation base and the encapsulation cover. However, during welding, the anti-magnetic surface within 1 mm to 2 mm of the encapsulation seam is melted by the high temperature of the laser, resulting in the destruction of the anti-magnetic shielding function at the welding seam, and the welding seam does not have the anti-magnetic shielding function. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an optical fiber loop encapsulation device, which can enable the welding seam to still have an anti-magnetic shielding function during the encapsulation welding of a high-precision optical fiber loop, and improve the magnetic field performance of the optical fiber loop.

[0005] The utility model is realized through the following technical solutions:

[0006] An optical fiber loop encapsulation device includes an encapsulation cover, an optical fiber loop, and an encapsulation base. The encapsulation base is provided with an annular cavity, the optical fiber loop is accommodated in the annular cavity, and the encapsulation cover and the encapsulation base are mated to form a magnetic shielding surface; the outer and inner joints of the encapsulation cover and the encapsulation base are welded by laser, and the laser direction is perpendicular to the magnetic shielding surface.

[0007] Further, the encapsulation cover includes an outer cover edge and an inner cover edge, the encapsulation base includes an outer base edge and an inner base edge, the outer cover edge is mated with the outer base edge, and the mating place is the outer mating part, and the outer mating part forms a first magnetic shielding surface; the inner cover edge is mated with the inner base edge, and the mating place is the inner mating part, and the inner mating part forms a second magnetic shielding surface.

[0008] Further, the number of the first magnetic shielding surfaces and the number of the second magnetic shielding surfaces are both at least one.

[0009] Further, the cross-sectional shape of the outer mating part can be an L shape. The outer cover edge is provided with a first step, the outer base edge is a first right-angle side, and the first step and the first right-angle side are mated to form an L-shaped cross-section.

[0010] Furthermore, the cross-sectional shape of the outer mating portion can also be Z-shaped. A first step is provided on the outer edge of the cover, and a third step is provided on the outer edge of the base. The first step and the third step are mated to form a Z-shaped cross-section.

[0011] Furthermore, the cross-sectional shape of the outer mating portion can also be convex. A first groove is provided on the outer edge of the cover, and the outer edge of the base is a first boss. The first groove and the first boss are mated to form a convex cross-section.

[0012] Furthermore, the cross-sectional shape of the inner mating portion and the mating formation method are the same as those of the outer mating portion.

[0013] Furthermore, when the first wall thickness of the outer wall of the encapsulation base is less than 1 mm, the cross-sectional shape of the outer mating portion is selected as an L-shaped structure; when the first wall thickness is greater than or equal to 1 mm, the cross-sectional shape of the outer mating portion is selected as a Z-shaped structure; when the first wall thickness is greater than or equal to 1.5 mm, the cross-sectional shape of the outer mating portion is selected as a convex structure.

[0014] Furthermore, the selection rule for the cross-sectional shape of the inner mating portion is the same as that of the outer mating portion, and it needs to be selected according to the first wall thickness of the inner wall of the encapsulation base.

[0015] Furthermore, the optical fiber ring is bonded to at least one of the encapsulation cover and the encapsulation base.

[0016] Compared with the prior art, the advantages of the present utility model are as follows:

[0017] 1. By adding an L-shaped or Z-shaped or convex snap-fit encapsulation structure, a magnetic shielding surface is added inside the weld seam. Even if the outermost magnetic shielding protection layer is damaged during welding, the magnetic shielding surface inside the weld seam is not affected, and the weld seam still has the magnetic shielding function.

[0018] 2. By adding an L-shaped or Z-shaped or convex snap-fit encapsulation structure, it can completely prevent the laser from directly irradiating and burning the high-precision optical fiber ring through the welding gap.

[0019] 3. By adding an L-shaped or Z-shaped or convex snap-fit encapsulation structure, a heat-insulating solid protection is added at the weld seam, completely preventing the high temperature from directly roasting the high-precision optical fiber ring through the horizontal gap or the vertical gap, preventing the melting of the glue and the optical fiber, protecting the high-precision optical fiber ring, and ensuring the reliability of the welding process encapsulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an assembly drawing of an optical fiber ring encapsulation device according to an embodiment of the present utility model;

[0021] Figure 2 It is an exploded view of an optical fiber ring encapsulation device according to an embodiment of the present utility model;

[0022] Figure 3 A cross-sectional view of an optical fiber loop encapsulation device according to an embodiment of the present invention;

[0023] Figure 4 is Figure 3 an enlarged view of B in

[0024] Figure 5 A cross-sectional view of an optical fiber loop encapsulation device according to another embodiment of the present invention;

[0025] Figure 6 is Figure 5 an enlarged view of D in

[0026] Figure 7 A cross-sectional view of an optical fiber loop encapsulation device according to still another embodiment of the present invention;

[0027] Figure 8 is Figure 7 an enlarged view of F in

[0028] In the figure: 1, encapsulation cover; 10, outer edge of the cover; 11, inner edge of the cover; 2, optical fiber loop; 3, encapsulation base; 30, annular cavity; 31, outer edge of the base; 32, inner edge of the base; 33, outer wall; 34, inner wall; S1, first wall thickness; S2, second wall thickness; 40, outer mating part; 401, first magnetic shielding surface; 41, inner mating part; 411, second magnetic shielding surface; G, laser direction; 5, outer connection part; 6, inner connection part; 700, first step; 701, second step; 702, third step; 703, fourth step; 710, first right-angled side; 711, second right-angled side; 720, first boss; 721, second boss; 730, first groove; 731, second groove. Detailed implementation manners

[0029] The technical solution of the utility model will be further described in detail in combination with the preferred embodiments and their accompanying drawings in a non-limiting manner. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation to the present utility model.

[0030] As Figure 1 and 2 shown, a fiber optic ring encapsulation device of the present utility model includes an encapsulation cover 1, a fiber optic ring 2, and an encapsulation base 3. The encapsulation cover 1, the fiber optic ring 2, and the encapsulation base 3 are all annular body structures. The encapsulation base 3 is provided with an annular cavity 30, and the fiber optic ring 2 is accommodated in the annular cavity 30. The encapsulation cover 1 and the encapsulation base 3 are mated to form magnetic shielding surfaces 401 and 411. The outer connection 5 and the inner connection 6 between the encapsulation cover 1 and the encapsulation base 3 are both laser welded. The laser direction G is perpendicular to the magnetic shielding surfaces 401 and 411.

[0031] As Figure 3 and 4 shown, the encapsulation cover 1 includes a cover outer edge 10 and a cover inner edge 11. The encapsulation base 3 includes a base outer edge 31 and a base inner edge 32. The cover outer edge 10 is mated with the base outer edge 31, and the mating place is the outer mating part 40. The outer mating part 40 forms a first magnetic shielding surface 401, so that the outer connection 5 has a magnetic shielding function. The cover inner edge 11 is mated with the base inner edge 32, and the mating place is the inner mating part 41. The inner mating part 41 forms a second magnetic shielding surface 411, so that the inner connection 6 still has a magnetic shielding function. The number of the first magnetic shielding surface 401 and the number of the second magnetic shielding surface 411 are both at least one.

[0032] The cross-sectional shape of the outer mating part 40 can be one of L-shaped, Z-shaped, and convex-shaped.

[0033] Specifically, when a first step 700 is provided at the outer edge 10 of the cover and the outer edge 31 of the base is a first right-angle side 710, the first step 700 and the first right-angle side 710 are engaged to form an L-shaped cross-section.

[0034] When a first step 700 is provided at the outer edge 10 of the cover and a third step 702 is provided at the outer edge 31 of the base, the first step 700 and the third step 702 are engaged to form a Z-shaped cross-section.

[0035] When a first groove 730 is provided at the outer edge 10 of the cover and the outer edge 31 of the base is a first boss 720, the first groove 730 and the first boss 720 are engaged to form a convex cross-section.

[0036] Similarly, the cross-sectional shape of the inner mating portion 41 can also be one of an L-shape, a Z-shape, and a convex shape. The mating formation method is the same as that of the outer mating portion 40.

[0037] Specifically, when the inner edge 11 of the cover is a second right-angle side 711 and a fourth step 703 is provided at the inner edge 32 of the base, the second right-angle side 711 and the fourth step 703 are engaged to form an L-shaped cross-section.

[0038] When a second step 701 is provided at the inner edge 11 of the cover and a fourth step 703 is provided at the inner edge 32 of the base, the second step 701 and the fourth step 703 are engaged to form a Z-shaped cross-section.

[0039] When a second groove 731 is provided at the inner edge 11 of the cover and the inner edge 32 of the base is a second boss 721, the second groove 731 and the second boss 721 are engaged to form a convex cross-section.

[0040] Due to the need to meet the machining accuracy requirements, when the first wall thickness S1 of the outer wall 33 of the encapsulation base 3 is less than 1 mm, the cross-sectional shape of the outer mating portion 40 is selected as an L-shaped structure. When the first wall thickness S1 is greater than or equal to 1 mm, the cross-sectional shape of the outer mating portion 40 is selected as a Z-shaped structure. When the first wall thickness S1 is greater than or equal to 1.5 mm, the cross-sectional shape of the outer mating portion 40 is selected as a convex structure. The selection rule for the cross-sectional shape of the inner mating portion 41 is the same as that of the outer mating portion 40, and the cross-sectional shape of the inner mating portion 41 needs to be selected according to the second wall thickness S2 of the inner wall 34 of the encapsulation base 3.

[0041] The optical fiber ring 2 is bonded to at least one of the encapsulation cover 1 and the encapsulation base 3, so that the optical fiber ring 2 can be fixed in the optical fiber ring encapsulation device, playing a shock-absorbing effect and thus protecting the optical fiber ring.

[0042] The materials of the encapsulation cover 1 and the encapsulation base 3 are both magnetic shielding materials. The encapsulation cover 1 and the encapsulation base 3 can prevent the interference of the external magnetic field on the optical fiber ring 2, thus ensuring the magnetic field performance of the optical fiber ring.

[0043] In an embodiment of the present utility model, a first step 700 is provided at the outer edge 10 of the cover, and a third step 702 is provided at the outer edge 31 of the base. The first step 700 and the third step 702 are seamlessly mated. The cross-sectional shape of the outer mating portion 40 is Z-shaped. The outer mating portion 40 forms a first magnetic shielding surface 401, and the laser direction G is perpendicular to the first magnetic shielding surface 401. Similarly, a second step 701 is provided at the inner edge 11 of the cover, and a fourth step 703 is provided at the inner edge 32 of the base. The second step 701 and the fourth step 703 are seamlessly mated. The cross-sectional shape of the inner mating portion 41 is Z-shaped. The inner mating portion 41 forms a second magnetic shielding surface 411. The laser direction G is perpendicular to the second magnetic shielding surface 411. During welding, even if the laser melts the anti-magnetic surface within 1 mm to 2 mm near the outer connection 5 and the inner connection 6 at high temperature, the first magnetic shielding surface 401 and the second magnetic shielding surface 411 inside the outer connection 5 and the inner connection 6 are not affected, and the outer connection 5 and the inner connection 6 still have the anti-magnetic shielding function. Moreover, the first magnetic shielding surface 401 and the second magnetic shielding surface 411 can completely prevent the laser from burning the optical fiber ring 2 through the welding gap. Additionally, an additional layer of heat-insulating solid protection is added at the welding seam, completely preventing the high temperature from directly baking the optical fiber ring 2 through the gap, preventing the high temperature from melting the optical fiber ring 2 and causing it to fall off or even be damaged, thus playing a role in protecting the optical fiber ring 2.

[0044] As Figure 5 and 6 shown, in another embodiment of the present utility model, a first step 700 is provided at the outer edge 10 of the cover, and the outer edge 31 of the base is a first right-angle side 710. The first step 700 and the first right-angle side 710 are seamlessly mated. The cross-sectional shape of the outer mating portion 40 is L-shaped. The outer mating portion 40 forms a first magnetic shielding surface 401. The laser direction G is perpendicular to the first magnetic shielding surface 401. The inner edge 11 of the cover is a second right-angle side 711, and a fourth step 703 is provided at the inner edge 32 of the base. The second right-angle side 711 and the fourth step 703 are seamlessly mated. The cross-sectional shape of the inner mating portion 41 is L-shaped. The inner mating portion 41 forms a second magnetic shielding surface 411. The laser direction G is perpendicular to the second magnetic shielding surface 411. During welding, even if the laser melts the anti-magnetic surface within 1 mm to 2 mm near the outer connection 5 and the inner connection 6 at high temperature, the first magnetic shielding surface 401 and the second magnetic shielding surface 411 inside the outer connection 5 and the inner connection 6 are not affected, and the outer connection 5 and the inner connection 6 still have the anti-magnetic shielding function. Moreover, the first magnetic shielding surface 401 and the second magnetic shielding surface 411 can completely prevent the laser from burning the optical fiber ring 2 through the welding gap. Additionally, an additional layer of heat-insulating solid protection is added at the welding seam, completely preventing the high temperature from directly baking the optical fiber ring 2 through the gap, preventing the high temperature from melting the optical fiber ring 2 and causing it to fall off or even be damaged, thus playing a role in protecting the optical fiber ring 2.

[0045] As Figure 7 and 8 shown, in another embodiment of the present utility model, a first groove 730 is formed on the outer edge 10 of the cover, and the outer edge 31 of the base is a first boss 720. The first groove 730 is seamlessly mated with the first boss 720. The cross-sectional shape of the outer mating portion 40 is convex. The outer mating portion 40 forms two mutually parallel first magnetic shielding surfaces 401. The laser direction G is perpendicular to the first magnetic shielding surface 401. Similarly, a second groove 731 is formed on the inner edge 11 of the cover, and the inner edge 32 of the base is a second boss 721. The second groove 731 is seamlessly mated with the second boss 721. The cross-sectional shape of the inner mating portion 41 is convex. The inner mating portion 41 forms two mutually parallel second magnetic shielding surfaces 411. The laser direction G is perpendicular to the second magnetic shielding surface 411. During welding, even if the laser's high temperature melts the anti-magnetic surfaces within 1 mm to 2 mm near the outer connection 5 and the inner connection 6, the first magnetic shielding surface 401 and the second magnetic shielding surface 411 inside the outer connection 5 and the inner connection 6 are not affected, and the outer connection 5 and the inner connection 6 still have the anti-magnetic shielding function. Moreover, the first magnetic shielding surface 401 and the second magnetic shielding surface 411 can completely prevent the laser from passing through the welding gap and burning the optical fiber ring 2. Additionally, an insulating solid protection layer is added at the welding seam, completely preventing the high temperature from directly baking the optical fiber ring 2 through the gap, preventing the high temperature from melting the optical fiber ring 2 and causing it to fall off or even be damaged, thus playing a role in protecting the optical fiber ring 2.

[0046] During encapsulation, the worker places the optical fiber ring 2 into the encapsulation base 3, and adhesively bonds the bottom surface of the optical fiber ring 2 to the encapsulation base 3 with an adhesive, or adhesively bonds the top of the optical fiber ring 2 to the encapsulation cover 1 with an adhesive to fix the optical fiber ring 2 in the entire device. Then, the worker laser-welds along the outer connection 5 between the outer edge 10 of the cover and the outer edge 31 of the base, and then laser-welds along the inner connection 6 between the inner edge 11 of the cover and the inner edge 32 of the base to form a closed optical fiber ring encapsulation device, and the outer connection 5 and the inner connection 6 still have the anti-magnetic shielding function. Or first laser-weld the inner connection 6 between the inner edge 11 of the cover and the inner edge 32 of the base, and then laser-weld the outer connection 5 between the outer edge 10 of the cover and the outer edge 31 of the base. The welding process can be reversed.

[0047] The fiber optic loop packaging device of the present utility model has a simple structure, small size and light weight. During welding, even if the anti-magnetic surface within 1 mm to 2 mm near the outer connection 5 and the inner connection 6 is melted by the high temperature of the laser, the first magnetic shielding surface 401 and the second magnetic shielding surface 411 inside the outer connection 5 and the inner connection 6 are not affected, and the outer connection 5 and the inner connection 6 still have the anti-magnetic shielding function. Moreover, the first magnetic shielding surface 401 and the second magnetic shielding surface 411 can completely prevent the laser from burning the fiber optic loop 2 through the welding gap. In addition, a layer of heat-insulating solid protection is added at the welding seam, completely preventing the high temperature from directly baking the fiber optic loop 2 through the gap, preventing the high temperature from melting the fiber optic loop 2 and causing it to fall off or even be damaged, thus playing a role in protecting the fiber optic loop 2.

[0048] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. An optical fiber ring packaging device, characterized in that: The invention comprises a packaging cover (1), an optical fiber ring (2) and a packaging base (3); the packaging base (3) is provided with an annular cavity (30), the optical fiber ring (2) is accommodated in the annular cavity (30), and the packaging cover (1) and the packaging base (3) are matched to form magnetic shielding surfaces (401, 411); the outer connecting part (5) and the inner connecting part (6) of the packaging cover (1) and the packaging base (3) are both laser welded, and the laser direction (G) is perpendicular to the magnetic shielding surfaces (401, 411).

2. The optical fiber ring packaging device according to claim 1, characterized in that: The packaging cover (1) comprises a cover outer edge (10) and a cover inner edge (11); the packaging base comprises a base outer edge (31) and a base inner edge (32); the cover outer edge (10) is matched with the base outer edge (31); the place where they are matched is an outer matching point (40); the outer matching point (40) forms a first magnetic shielding surface (401); the cover inner edge (11) is matched with the base inner edge (32); the place where they are matched is an inner matching point (41); the inner matching point (41) forms a second magnetic shielding surface (411).

3. The optical fiber ring packaging device according to claim 2, characterized in that: The number of the first magnetic shielding surfaces (401) and the number of the second magnetic shielding surfaces (411) are both at least one.

4. The optical fiber ring packaging device according to claim 2, characterized in that: The cross-sectional shape of the external joint (40) may be L-shaped, the outer edge of the cover (10) is provided with a first step (700), the outer edge of the base (31) is a first right-angled side (710), and the first step (700) and the first right-angled side (710) are matched to form an L-shaped cross-section.

5. The optical fiber ring packaging device according to claim 4, characterized in that: The cross-sectional shape of the external joint (40) may also be Z-shaped, the outer edge of the cover (10) is provided with the first step (700), the outer edge of the base (31) is provided with the third step (702), and the first step (700) and the third step (702) are matched to form a Z-shaped cross-section.

6. The optical fiber ring packaging device according to claim 2, characterized in that: The cross-sectional shape of the external joint (40) may also be convex, the outer edge of the cover (10) is provided with a first groove (730), the outer edge of the base (31) is a first boss (720), and the first groove (730) and the first boss (720) are matched to form a convex cross-sectional shape.

7. The optical fiber ring packaging device according to any one of claims 4 to 6, characterized in that: The cross-sectional shape and the matching formation method of the inner matching part (41) are consistent with the cross-sectional shape and the matching formation method of the outer matching part (40).

8. The optical fiber ring packaging device according to any one of claims 4 to 6, characterized in that: When the first wall thickness (S1) of the outer wall (33) of the packaging base (3) is less than 1 mm, the cross-sectional shape of the external connection (40) is selected to be an L-shaped structure; when the first wall thickness (S1) is greater than or equal to 1 mm, the cross-sectional shape of the external connection (40) is selected to be a Z-shaped structure; when the first wall thickness (S1) is greater than or equal to 1.5 mm, the cross-sectional shape of the external connection (40) is selected to be a convex structure.

9. The optical fiber ring packaging device according to claim 8, characterized in that: The selection rule of the cross-sectional shape of the inner matching part (41) is consistent with the selection rule of the cross-sectional shape of the outer matching part (40), and needs to be selected according to the second wall thickness (S2) of the inner wall (34) of the packaging base (3).

10. The optical fiber ring packaging device according to claim 1, characterized in that: The optical fiber ring (2) is glued to at least one of the packaging cover (1) and the packaging base (3).

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