Optical fiber and glass sleeve center positioning device

Abstract

The utility model discloses a center positioning device for an optical fiber and a glass sleeve, which belongs to the technical field of optical equipment preparation, and comprises a tool base, a pair of symmetrically distributed object placing seat I and object placing seat II is integrally formed at the upper end of the tool base, and the object placing seat I and the object placing seat II are arranged on the tool base. A plurality of first storage grooves and second storage grooves which are coaxially arranged are formed in the first storage base and the second storage base respectively, the first storage grooves and the second storage grooves are semicircular inwards-concave groove bodies, glass sleeves are placed on the pair of coaxial and collinear first storage grooves, the diameter of each first storage groove is matched with the outer diameter of the corresponding glass sleeve, and the diameter of each second storage groove is matched with the outer diameter of the corresponding glass sleeve. According to the scheme, the glass sleeve and the optical fiber can be pre-positioned, so that the optical fiber is strictly positioned in the geometric center of the glass sleeve when being preliminarily fixed, the optical fiber is prevented from being directly contacted with the inner wall of the glass sleeve, the problem of local stress concentration caused by fitting is solved, and the fatigue fracture risk of the optical fiber caused by external force vibration or temperature change is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of optical equipment manufacturing technology, and more specifically, to a center positioning device for optical fiber and glass sleeve. Background Technology

[0002] In practical applications of high-power fiber lasers, fiber optic splicing, fusion splicing, and texturing are frequently performed. Without protection after the outer coating is removed, the fiber is prone to breakage and dust accumulation, both of which can damage the laser. To address this issue, glass sleeves are used to protect the fragile areas of the fiber optic splices and texturing areas, with special adhesives used on both sides to secure the fiber to the glass sleeve.

[0003] In actual operation, during the period between applying adhesive to the glass sleeve and the complete curing of the adhesive, the optical fiber tends to deviate to one side and contact the glass wall inside the sleeve. This can lead to the following two problems during subsequent use: 1. Mechanical stress concentration: Local stress is generated at the contact point between the optical fiber and the glass wall due to external force or thermal expansion and contraction, which can easily lead to fatigue fracture of the optical fiber after long-term use; 2. Increased risk of thermal damage: During high-power laser transmission, the surface of the bare fiber may generate heat due to scattering or defects. Although the glass sleeve has a certain thermal conductivity, a "thermal bridge" will form at the contact point, causing a sudden increase in local temperature (the thermal conductivity of glass is only about 1.1 W / (m·K), which is lower than the heat dissipation efficiency of air convection), ultimately causing optical fiber ablation. To address these two points, it is urgent to design an auxiliary positioning fixture that can ensure that the optical fiber is always located in the center of the sleeve and that the gap between the entire optical fiber section inside the sleeve is uniform, thus structurally preventing the two from sticking together. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a center positioning device for optical fiber and glass sleeve. It can pre-position the glass sleeve and optical fiber, so that the optical fiber is strictly located at the geometric center of the glass sleeve when it is initially fixed, avoiding direct contact between the optical fiber and the inner wall of the glass sleeve, eliminating the problem of local stress concentration caused by bonding, and effectively reducing the risk of fatigue fracture of the optical fiber caused by external force vibration or temperature change.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A fiber optic cable and glass sleeve center positioning device includes a tooling base. A pair of symmetrically distributed placement seats 1 and 2 are integrally formed on the upper end of the tooling base. Multiple coaxially arranged placement slots 1 and 2 are respectively formed on placement seats 1 and 2, and both placement slots 1 and 2 are semi-circular recessed bodies. A glass sleeve is placed on the coaxially collinear pair of placement slots 1, and the diameter of placement slot 1 matches the outer diameter of the glass sleeve. An optical fiber is inserted into the glass sleeve, and both ends of the optical fiber extend to the coaxially collinear pair of placement slots 2, and the diameter of placement slot 2 matches the outer diameter of the optical fiber. When the glass sleeve is placed in placement slot 1, the geometric center of the glass sleeve is coaxial with the center of placement slot 2. A flow channel is provided between placement seats 1 and 2, and an auxiliary positioning mechanism is also provided on placement slot 2.

[0009] Furthermore, the auxiliary positioning mechanism includes a pair of positioning rings symmetrically distributed at the left and right ends of the storage seat two. A counterweight is inserted into each of the positioning rings at the left and right ends. A limit band is fixedly connected between the pair of counterweights. The lower surface of the limit band is used to assist in positioning the optical fiber set on the storage slot two.

[0010] Furthermore, the limiting band is an elastic band, the length of which matches the width of the second storage seat, and both ends of the second storage seat are chamfered. When a pair of counterweights are inserted into a pair of symmetrically distributed positioning rings, the limiting band is in a stretched state.

[0011] Furthermore, the spacing between a pair of adjacent positioning rings on the same side is less than the length of the limiting band.

[0012] Furthermore, the counterweight is configured as a frustum shape, and the inner diameter of the positioning ring is smaller than the upper bottom diameter of the counterweight.

[0013] 3. Beneficial effects

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution uses storage slot one and storage slot two to pre-position the glass sleeve and optical fiber, so that the optical fiber is strictly in the geometric center of the glass sleeve when it is initially fixed, avoiding direct contact between the optical fiber and the inner wall of the glass sleeve, eliminating the problem of local stress concentration caused by bonding, effectively reducing the risk of fatigue fracture of the optical fiber caused by external force vibration or temperature change, helping enterprises to significantly improve product production efficiency while effectively reducing the difficulty of quality control.

[0016] (2) By creating a uniform gap between the optical fiber and the inner wall of the glass sleeve, this solution can reduce the heat accumulation effect at the contact point during high-power laser transmission compared to the traditional assembly method, avoid the ablation or melting of the optical fiber due to local overheating, and significantly extend the service life of the core components of the laser. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This utility model Figure 1 Enlarged view at point B in the middle;

[0020] Figure 4 This is a side view of the present invention.

[0021] Explanation of the labels in the diagram:

[0022] 1. Tooling base;

[0023] 2. One storage seat; 201. One storage slot;

[0024] 3. Storage seat two; 301. Storage slot two;

[0025] 4. Glass sleeve;

[0026] 5. Optical fiber;

[0027] 6. Flow channel;

[0028] 7. Positioning ring;

[0029] 8. Counterweight;

[0030] 9. Limiting belt. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Example:

[0035] Please see Figure 1-4A fiber optic cable and glass sleeve center positioning device includes a tooling base 1. A pair of symmetrically distributed placement seats 2 and 3 are integrally formed on the upper end of the tooling base 1. Multiple coaxially arranged placement slots 201 and 301 are respectively formed on the placement seats 2 and 3, allowing multiple sets of glass sleeves 4 and optical fibers 5 to be simultaneously glued. Both placement slots 201 and 301 are semi-circular recessed bodies. A glass sleeve 4 is placed on the coaxial placement slot 201, and the diameter of the placement slot 201 matches the outer diameter of the glass sleeve 4. An optical fiber 5 is inserted into the glass sleeve 4. After the optical fiber 5 is inserted into the glass sleeve 4, the glass sleeve 4 is placed on the placement slot 201. At this time, both ends of the optical fiber 5 extend to the coaxial placement slot 301, and the diameter of the placement slot 301 matches the outer diameter of the optical fiber 5. When the glass sleeve 4 is placed in the storage tank 201, the geometric center of the glass sleeve 4 is coaxial with the center of the storage tank 301. Since the optical fiber 5 is evenly distributed circumferentially in the storage tank 301, it can be ensured that the part of it located inside the glass sleeve 4 is also located at the center of the glass sleeve 4. This ensures that there is a uniform gap between the optical fiber 5 and the inner wall of the glass sleeve 4, effectively avoiding direct contact between the optical fiber 5 and the inner wall of the glass sleeve 4. Compared with the traditional method where it is difficult to avoid contact between the optical fiber 5 and the inner wall of the glass sleeve 4, the existence of a uniform gap can reduce the heat accumulation effect at the contact point during high-power laser transmission, avoid the ablation or melting of the optical fiber 5 due to local overheating, and significantly extend the service life of the core components of the laser. A flow channel 6 is provided between the storage base 2 and the storage base 3. The flow channel 6 can provide an air supply space for the glass sleeve 4 and the optical fiber 5 after the glue is injected. By sending air to this place by external force, the curing speed of the glue can be accelerated.

[0036] The storage base 2 3 is also equipped with an auxiliary positioning mechanism, which includes a pair of positioning rings 7 symmetrically distributed at the left and right ends of the storage base 2 3. A counterweight 8 is inserted into each of the positioning rings 7 at both ends. The counterweight 8 is shaped like a frustum, and the inner diameter of the positioning ring 7 is smaller than the upper diameter of the counterweight 8. By setting the shape of the counterweight 8 and the parameters between the positioning ring 7 and the counterweight 8, the counterweight 8 can be easily removed and placed from the positioning ring 7. A limit band 9 is fixedly connected between each pair of counterweights 8 for limiting... The belt 9 is an elastic belt. The length of the limiting belt 9 matches the width of the second storage seat 3. Both ends of the second storage seat 3 are chamfered. The chamfering can effectively prevent local stress concentration in the limiting belt 9 during use, thereby increasing the service life of the limiting belt 9. When a pair of counterweights 8 are inserted into a pair of symmetrically distributed positioning rings 7, the limiting belt 9 is in a stretched state. This allows the lower surface of the limiting belt 9 to provide auxiliary positioning for the optical fiber 5 set on the second storage slot 301, so that it will not be offset.

[0037] The distance between a pair of adjacent positioning rings 7 on the same side is less than the length of the limiting band 9. When the auxiliary optical fiber 5 is not needed for positioning, a pair of counterweights 8 can be placed into the positioning rings 7 on the same side at the same time, which can release the tension of the limiting band 9 in time, keep it in a natural relaxed state, and extend its service life.

[0038] In use: First, insert the optical fiber 5 into the glass sleeve 4. Then, place the glass sleeve 4 on a pair of storage slots 201. At this time, the optical fiber 5 also rests on the coaxial storage slot 301. Since the geometric center of the glass sleeve 4 placed on the storage slot 201 is coaxial with the storage slot 301, the optical fiber 5, which is in contact with the inner wall of the storage slot 301, is located at the geometric center of the glass sleeve 4. Thus, the initial positioning of the optical fiber 5 is completed. Next, place one of the counterweights 8 on the same side into the positioning ring 7 at the other end, so that the limiting band 9 between the pair of counterweights 8 is stretched, and the optical fiber 5 located in the storage slot 301 is limited. To ensure that it remains at the geometric center of the glass sleeve 4 throughout subsequent work without shifting, adhesive is applied to both ends of the glass sleeve 4 and allowed to cure. Compared with existing technologies, this invention uses storage slot 1 201 and storage slot 2 301 to pre-position the glass sleeve 4 and optical fiber 5, ensuring that the optical fiber 5 is strictly at the geometric center of the glass sleeve 4 during initial fixing. This avoids direct contact between the optical fiber 5 and the inner wall of the glass sleeve 4, eliminates the problem of local stress concentration caused by bonding, effectively reduces the risk of fatigue fracture of the optical fiber 5 due to external vibration or temperature changes, and helps enterprises significantly improve product production efficiency while effectively reducing the difficulty of quality control.

[0039] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A fiber and glass sleeve centering device comprising a tool base (1) characterized in that: The upper end of the tool base (1) is integrally formed with a pair of symmetrically distributed storage seats (2) and (3), a plurality of coaxially arranged storage grooves (201) and (301) are respectively formed on the storage seats (2) and (3), and the storage grooves (201) and (301) are all set as semicircular concave groove bodies, a glass sleeve (4) is placed on a pair of coaxially collinear storage grooves (201), the diameter of the storage groove (201) matches the outer diameter of the glass sleeve (4), an optical fiber (5) is inserted into the glass sleeve (4), and the two ends of the optical fiber (5) respectively extend to a pair of coaxially collinear storage grooves (301) of the glass sleeve (4), the diameter of the storage groove (301) matches the outer diameter of the optical fiber (5), when the glass sleeve (4) is placed in the storage groove (201), the geometric center of the glass sleeve (4) is coaxial with the center of the storage groove (301), a flow channel (6) is arranged between the storage seats (2) and (3), and an auxiliary positioning mechanism is further arranged on the storage seat (3).

2. A fiber and glass sleeve centering device according to claim 1, characterized in that: The auxiliary positioning mechanism comprises a pair of positioning rings (7) symmetrically arranged at the left and right ends of the storage seat (3), a counterweight (8) is inserted into each of the positioning rings (7) at the left and right ends, a limiting belt (9) is fixedly connected between a pair of the counterweights (8), and the lower surface of the limiting belt (9) is used for auxiliary positioning of the optical fiber (5) arranged on the storage groove (301).

3. An optical fiber and glass sleeve centering device according to claim 2, wherein: The limiting belt (9) is an elastic belt, the length of the limiting belt (9) matches the width of the storage seat (3), and the left and right ends of the storage seat (3) are both provided with chamfers, when a pair of the counterweights (8) are inserted into the pair of symmetrically arranged positioning rings (7), the limiting belt (9) is in a stretched state.

4. An optical fiber and glass sleeve centering device according to claim 2, wherein: The distance between a pair of adjacent positioning rings (7) on the same side is less than the length of the limiting belt (9).

5. An optical fiber and glass sleeve centering device according to claim 2, wherein: The counterweight (8) is set as a circular truncated cone, and the inner diameter of the positioning ring (7) is less than the upper base diameter of the counterweight (8).

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