CN210802860U - Optical fiber bending loss test tool - Google Patents

Abstract

The utility model discloses an optical fiber bending loss testing tool, which belongs to the technical field of optical fiber detection and comprises a bottom plate, wherein an optical fiber groove which is used for accommodating optical fibers and is in a circular arc shape is arranged on the bottom plate; the pressing structure is arranged on the bottom plate and comprises a pressing block, the pressing block is provided with a pressing position and a loosening position, when the pressing block is located at the pressing position, the pressing block is abutted to the optical fiber, when the pressing block is located at the loosening position, the pressing block is separated from the optical fiber, and an opening for the optical fiber to enter or be separated from the optical fiber groove is formed between the pressing block and one side wall of the optical fiber groove. The optical fiber can be arranged in the optical fiber groove to be bent, so that the bending degree of the optical fiber is the same during each test, and the optical fiber can be fixed through the pressing block, and the accuracy of a test result is ensured. When the pressing block is located at the loosening position, the optical fiber can enter or depart from the optical fiber groove through the opening, and the optical fiber can be bent for multiple times, so that the bending loss test of the bending fatigue state of the optical fiber under different bending times is realized.

Description

Optical fiber bending loss test tool

Technical Field

The utility model relates to an optical fiber detection technical field especially relates to an optic fibre bending loss test fixture.

Background

The bending of the optical fiber causes the bending loss of the optical fiber, and particularly when the bending radius of the optical fiber is larger after the optical fiber is bent and the curvature radius is comparable to the diameter of the fiber core, the transmission characteristic of the optical fiber is changed, a large amount of conduction modes are converted into radiation modes and do not continue to be transmitted, but enter the cladding and are absorbed by the coating layer or the cladding, and therefore the additional loss of the optical fiber is caused. The macrobend loss of the optical fiber is an additional loss caused when the curvature radius of the optical fiber after bending is larger than the diameter of the optical fiber.

Therefore, performing macrobending loss test on the optical fiber is an important link in the optical fiber manufacturing process, and the currently commonly used optical fiber bending loss test method is to wind the optical fiber on a cylindrical test wheel shaft, detect macrobending loss of the optical fiber by comparing the change of optical characteristics of the optical fiber in a bent state and an unbent state, but the force of manual operation is not uniform, so that the bending degree of the optical fiber is different in each test, and the accuracy of a test result is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an optic fibre bending loss test fixture to the realization improves the accuracy of test result to the test of optic fibre bending loss.

As the conception, the utility model adopts the technical proposal that:

an optical fiber bending loss test tool comprises:

the optical fiber connector comprises a bottom plate, wherein an arc-shaped optical fiber groove for accommodating optical fibers is formed in the bottom plate;

the pressing structure is arranged on the bottom plate and comprises a pressing block, the pressing block is provided with a pressing position and a releasing position, when the pressing block is located at the pressing position, the pressing block abuts against the optical fiber, when the pressing block is located at the releasing position, the pressing block is separated from the optical fiber, and an opening for the optical fiber to enter or separate from the optical fiber groove is formed between the pressing block and one of the side walls of the optical fiber groove.

Further, a first inclined surface is arranged on the other side wall of the optical fiber groove, and the pressing block can slide along the first inclined surface.

Furthermore, one side of the pressing block is provided with a second inclined surface matched with the first inclined surface, and a pressing surface and an abutting surface which are respectively connected to two sides of the second inclined surface, when the pressing block is located at the pressing position, the pressing surface abuts against the optical fiber, and the abutting surface abuts against the bottom plate.

Furthermore, the pressing structure further comprises a locking piece, a strip-shaped hole extending along the radial direction of the optical fiber groove is formed in the pressing block, a fastening hole is formed in the bottom plate, and the locking piece penetrates through the strip-shaped hole and stretches into the fastening hole to lock or loosen the pressing block.

Further, the locking piece is a bolt, and the fastening hole is a threaded hole matched with the bolt.

Further, a limiting structure is arranged on the first inclined surface and configured to limit the pressing block to the releasing position.

Further, the compressing structure is detachably arranged on the bottom plate.

Further, the plurality of the compression structures are arranged on the bottom plate at intervals along the extending direction of the optical fiber groove.

Furthermore, the optical fiber grooves are arranged in a plurality of concentric circles, and the radius of each optical fiber groove is different.

Furthermore, two ends of the optical fiber groove along the extending direction of the optical fiber groove are provided with linear grooves communicated with the optical fiber groove, and the structures of the linear grooves are the same as those of the optical fiber groove.

The utility model has the advantages that:

the utility model provides an optic fibre bending loss test fixture, through setting up optic fibre groove and compact heap, on the one hand can place optic fibre in the optic fibre groove and bend, guarantee that the bending degree of optic fibre is the same when testing at every turn to can fix through the compact heap, guarantee the accuracy of test result; on the other hand, when the pressing block is in the loosening position, the optical fiber can enter or depart from the optical fiber groove through the opening, so that the optical fiber can be bent for many times, and the bending loss test of the optical fiber in the bending fatigue states of different degrees is realized.

Drawings

Fig. 1 is a schematic structural diagram of an optical fiber bending loss testing tool according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a pressing block according to a first embodiment of the present invention;

fig. 4 is a cross-sectional view of a compact heap according to an embodiment of the present invention;

fig. 5 is a schematic view of a pressing block provided in a first embodiment of the present invention in a pressing position;

fig. 6 is a schematic view of a compact block according to an embodiment of the present invention in a relaxed position;

fig. 7 is a schematic view of the pressing block provided by the second embodiment of the present invention in the pressing position.

In the figure:

1. a base plate; 11. a fiber groove; 111. a first inclined plane; 12. a linear groove;

2. a compression structure; 21. a compression block; 201. a strip-shaped hole; 211. a second inclined plane; 212. an abutting surface; 213. a compression surface; 22. a locking member;

10. an optical fiber.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

As shown in fig. 1 to 6, the present embodiment provides an optical fiber bending loss testing tool, which includes a bottom plate 1 and a pressing structure 2. The bottom plate 1 is provided with an arc-shaped optical fiber groove 11 for accommodating the optical fiber 10. The pressing structure 2 is disposed on the bottom plate 1, the pressing structure 2 includes a pressing block 21, the pressing block 21 has a pressing position and a releasing position, as shown in fig. 5, when the pressing block 21 is located at the pressing position, the pressing block 21 abuts against the optical fiber 10. As shown in fig. 6, when the pressing block 21 is in the release position, the pressing block 21 is separated from the optical fiber 10, and an opening for allowing the optical fiber 10 to enter or exit from the optical fiber groove 11 is formed between the pressing block 21 and one of the side walls (defined as the first side wall) of the optical fiber groove 11.

Optionally, in this embodiment, the optical fiber grooves 11 are provided in plural numbers, the plural optical fiber grooves 11 are concentrically arranged on the bottom plate 1, and the radius of each optical fiber groove 11 is different. By providing a plurality of optical fiber grooves 11 with different radii, it is possible to test the loss of the optical fiber 10 in a bent state with different radii. Further, both ends of each optical fiber groove 11 along the extending direction thereof are provided with linear grooves 12 communicating with the optical fiber groove 11, and the cross section of the linear groove 12 in the thickness direction of the bottom plate 1 has the same structure as the radial cross section of the optical fiber groove 11. It will be appreciated that the optical fiber 10 is in a bent state in the fiber groove 11, while the optical fiber 10 is in a straightened state in the linear groove 12, thereby ensuring that the bent state of the optical fiber 10 is consistent with each bend.

Alternatively, as shown in fig. 2 to 4, in this embodiment, a first inclined surface 111 is provided on another side wall (defined as a second side wall, which is opposite to the first side wall) of the optical fiber groove 11, the pressing block 21 can slide along the first inclined surface 111, and when the pressing block 21 is located at the release position, the pressing block 21 is separated from the optical fiber 10, and an opening for allowing the optical fiber 10 to enter or exit from the optical fiber groove 11 is formed between the pressing block 21 and the first side wall of the optical fiber groove 11. The pressing block 21 has a second inclined surface 211 matched with the first inclined surface 111 on one side, and a pressing surface 213 and an abutting surface 212 respectively connected to both sides of the second inclined surface 211, when the pressing block 21 is located at the pressing position, the pressing surface 213 abuts on the optical fiber 10, and the abutting surface 212 abuts on the upper surface of the bottom plate 1. Above-mentioned compact structure 2 still includes retaining member 22, offers the bar hole 201 along the radial extension of fiber groove 11 on the compact heap 21, has offered the fastening hole on the bottom plate 1, and retaining member 22 wears to locate bar hole 201 and stretches into in the fastening hole, and retaining member 22 is connected with bottom plate 1 to lock compact heap 21 or relax.

It will be appreciated that when the clamp block 21 is in the clamping position, the retaining member 22 can secure the clamp block 21 to the base plate 1 to effect clamping of the clamp block 21 on the optical fiber 10, thereby securing the optical fiber 10 in the optical fiber slot 11. After the test is completed, the locking member 22 is reversely screwed, so that the locking member 22 releases the pressing block 21, and since the pressing block 21 is provided with the strip-shaped hole 201, the pressing block 21 can slide along the first inclined plane 111 from the pressing position to the releasing position, so that the pressing block 21 is separated from the optical fiber 10, and an opening for the optical fiber 10 to enter or leave the optical fiber groove 11 is formed between the pressing block 21 and the first side wall, and at this time, the optical fiber 10 can enter or leave the optical fiber groove 11 through the opening according to the direction indicated by the arrow in fig. 6. In addition, when the bending loss test of the optical fiber 10 in the bending fatigue state under different bending times is required, the pressing block 21 may be moved to the release position, at which the optical fiber 10 may be repeatedly bent through the optical fiber groove 11, and after the preset bending times are reached, the pressing block 21 is moved to the pressing position to press the optical fiber 10, and the bending loss test of the optical fiber 10 is performed.

Since the holding-down block 21 is raised in the depth direction of the optical fiber groove 11 when the holding-down block 21 slides from the holding-down position to the release position, the lock member 22 should not restrict the vertical movement of the holding-down block 21 at this time. In this embodiment, the locking member 22 is preferably a bolt, and the fastening hole is a threaded hole capable of being matched with the bolt. By providing the retaining member 22 as a bolt, when the pressing block 21 is located at the pressing position, the screw of the bolt is screwed into the fastening hole, and the head of the bolt abuts against the upper surface of the pressing block 21, so that the pressing block 21 is locked, and the optical fiber 10 is pressed. When the optical fiber 10 needs to be taken out, the bolt is screwed upwards (the screw is still partially located in the fastening hole), so that the pressing block 21 can slide along the first inclined surface 111, and the bolt does not interfere with the sliding of the pressing block 21.

Optionally, the pressing structure 2 is detachably disposed on the bottom plate 1, specifically, in the embodiment, by disposing the locking member 22 as a bolt, the detachable connection of the pressing structure 2 and the bottom plate 1 is realized, so that the pressing block 21 can be detached when the pressing structure 2 is not needed. Of course, in other embodiments, the pressing structure 2 may further include a clamping block capable of being clamped with the bottom plate 1, and the clamping block can lock the pressing block 22 in the pressing position when being clamped with the bottom plate 1.

Optionally, in this embodiment, the fiber groove 11 includes a first groove and a second groove which are communicated with each other, the first groove is located below the second groove, and the first groove is used for accommodating the optical fiber 10. One of the side wall surfaces of the second groove is the first inclined surface 111, and the other side wall surface is vertically arranged, so that the pressing block 21 can be limited. When the compact heap 21 was located the position that compresses tightly, compact heap 21 butt in the vertical lateral wall face that sets up of second groove, can understand that the lateral wall face of the vertical setting of second groove can carry on spacingly to compact heap 21, is favorable to making compact heap 21 compress tightly optic fibre 10 when compressing tightly the position.

Optionally, in this embodiment, a limiting structure (not shown in the figure) is disposed on the first inclined surface 111, and the limiting structure is used for limiting the pressing block 21 to the release position. Specifically, the limiting structure is convex and is arranged on the first inclined surface 111, when the pressing block 21 is located at the releasing position, the bottom of the pressing block 21 can be abutted against the limiting structure, and the weight of the pressing block 21 can be supported by the limiting structure, so that the pressing block 21 stably stops at the releasing position and cannot slide down due to self gravity; when compact heap 21 was located the position that compresses tightly, limit structure was located inside bar hole 201 to, limit structure can not influence compact heap 21 and relax the removal between the position and compress tightly the position. It will be appreciated that, due to the provision of the stop formation, it is necessary to lift the hold-down block 21 upwardly to clear the hold-down block 21 when moving the hold-down block 21 from the hold-down position to the release position. Of course, the limiting structure may be a triangular structure, and both inclined surfaces of the triangular structure are connected to the first inclined surface 111, and at this time, the pressing block 21 may slide over the limiting structure.

Optionally, in this embodiment, the pressing structures 2 are provided in plurality, the plurality of pressing structures 2 are divided into a plurality of groups, and each group of pressing structures 2 is disposed on the bottom plate 1 at intervals along the extending direction of one optical fiber groove 11 and two linear grooves 12 correspondingly communicated with the optical fiber groove 11. Of course, the structure of the pressing structure 2 is not limited to this in this embodiment, and the pressing block 21 of the pressing structure 2 may also be a structure extending along the extending direction of the optical fiber slot 11, that is, the pressing block 21 has an arc-shaped structure, but the processing difficulty of the pressing block 21 may be increased at this time.

In conclusion, the optical fiber bending loss test tool provided by the embodiment can bend the optical fiber 10 in the optical fiber groove 11 by arranging the optical fiber groove 11 and the pressing block 21, ensures that the bending degree of the optical fiber 10 is the same when testing at each time, and can fix the optical fiber bending loss test tool by the pressing block 21, thereby ensuring the accuracy of the test result. On the other hand, when the pressing block 21 is in the relaxed position, the optical fiber 10 can enter or exit the optical fiber groove 11 through the opening, and the optical fiber 10 can be bent for multiple times, so that the bending loss test of the optical fiber 10 in different bending fatigue states (different bending times and different bending fatigue states of the optical fiber) is realized.

Example two

The optical fiber bending loss test tool provided by the embodiment is basically the same as the optical fiber bending loss test tool in the first embodiment, and the difference is that: one side wall surface of the optical fiber groove 11 is vertically arranged, the other side wall surface forms the first inclined surface 111, the two side wall surfaces of the optical fiber groove 11 are connected through the groove bottom surface of the optical fiber groove 11, the groove bottom surface is a plane, and at this time, the section of the optical fiber groove 11 along the radial direction is trapezoidal. Of course, in other embodiments, it is also possible to connect the side wall surfaces of the fiber groove 11, and the cross section of the fiber groove 11 along the radial direction is triangular.

The rest of the structure of the optical fiber bending loss testing tool provided in this embodiment is the same as that of the optical fiber bending loss testing tool in the first embodiment, and is not described herein again.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides an optic fibre bending loss test fixture which characterized in that includes:

the optical fiber connector comprises a bottom plate (1), wherein an arc-shaped optical fiber groove (11) for accommodating an optical fiber (10) is formed in the bottom plate (1);

the pressing structure (2) is arranged on the bottom plate (1), the pressing structure (2) comprises a pressing block (21), the pressing block (21) is provided with a pressing position and a releasing position, when the pressing block (21) is located at the pressing position, the pressing block (21) is abutted to the optical fiber (10), when the pressing block (21) is located at the releasing position, the pressing block (21) is separated from the optical fiber (10), and the pressing block (21) and one of the side walls of the optical fiber groove (11) form an opening for the optical fiber (10) to enter or be separated from the optical fiber groove (11).

2. The optical fiber bending loss testing tool according to claim 1, wherein a first inclined surface (111) is arranged on the other side wall of the optical fiber groove (11), and the pressing block (21) can slide along the first inclined surface (111).

3. The optical fiber bending loss testing tool according to claim 2, wherein one side of the pressing block (21) is provided with a second inclined surface (211) matched with the first inclined surface (111), and a pressing surface (213) and an abutting surface (212) which are respectively connected to two sides of the second inclined surface (211), when the pressing block (21) is located at the pressing position, the pressing surface (213) abuts against the optical fiber (10), and the abutting surface (212) abuts against the bottom plate (1).

4. The optical fiber bending loss testing tool according to claim 3, wherein the pressing structure (2) further comprises a locking member (22), a strip-shaped hole (201) extending along the radial direction of the optical fiber groove (11) is formed in the pressing block (21), a fastening hole is formed in the bottom plate (1), and the locking member (22) penetrates through the strip-shaped hole (201) and extends into the fastening hole to lock or loosen the pressing block (21).

5. The optical fiber bending loss testing tool according to claim 4, wherein the locking member (22) is a bolt, and the fastening hole is a threaded hole capable of being matched with the bolt.

6. The optical fiber bending loss testing tool according to claim 2, wherein a limiting structure is arranged on the first inclined surface (111), and the limiting structure is configured to limit the compression block (21) to the release position.

7. The optical fiber bending loss testing tool according to claim 1, wherein the compressing structure (2) is detachably arranged on the bottom plate (1).

8. The optical fiber bending loss testing tool according to claim 1, wherein a plurality of the compression structures (2) are arranged, and the plurality of the compression structures (2) are arranged on the bottom plate (1) at intervals along the extending direction of the optical fiber groove (11).

9. The optical fiber bending loss testing tool according to claim 1, wherein a plurality of optical fiber grooves (11) are arranged, the plurality of optical fiber grooves (11) are concentrically arranged, and the radius of each optical fiber groove (11) is different.

10. The optical fiber bending loss testing tool according to claim 1, wherein two ends of the optical fiber groove (11) in the extending direction are provided with linear grooves (12) communicated with the optical fiber groove (11).

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