CN211262661U - Fiber winding device for accurately measuring macrobending loss of optical fiber - Google Patents
Fiber winding device for accurately measuring macrobending loss of optical fiber Download PDFInfo
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- CN211262661U CN211262661U CN202020050790.5U CN202020050790U CN211262661U CN 211262661 U CN211262661 U CN 211262661U CN 202020050790 U CN202020050790 U CN 202020050790U CN 211262661 U CN211262661 U CN 211262661U
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Abstract
The utility model discloses a fine device of winding of accurate measurement optic fibre macrobend loss belongs to fiber detection instrument technical field, include: the lower fiber winding unit comprises a bottom plate and a plurality of first fiber winding columns, and the first fiber winding columns are arranged in an array at equal intervals along the length direction of the bottom plate; the upper fiber winding unit comprises a top plate and a plurality of second fiber winding columns, the second fiber winding columns are arranged at equal intervals in an array mode along the length direction of the bottom plate, and the first fiber winding columns and the second fiber winding columns are arranged in a staggered mode; the driving unit is used for driving the upper fiber winding unit to linearly move relative to the lower fiber winding unit; and the fiber feeding unit is used for clamping the optical fiber to move in the directions of the upward fiber winding unit and the downward fiber winding unit. The utility model discloses realize automatic around fine, guaranteed optical fiber test state's stability, improved the measuring accuracy, improved test speed.
Description
Technical Field
The utility model relates to an optical fiber detection instrument technical field specifically is a winding fine device that relates to an accurate measurement optic fibre macrobend loss.
Background
The optical fiber has the advantages of strong anti-interference capability, light weight, small volume, corrosion resistance, good electrical insulation, safety, reliability and the like, and is rapidly developed in the fields of optical fiber communication and optical fiber sensing. In the practical use process, the optical fiber is easy to bend to generate macrobending loss, and the macrobending loss is very unfavorable for long-distance optical signal transmission, so that the macrobending loss of the optical fiber is tested, the macrobending loss performance of the optical fiber is known, and the optical fiber communication is significant.
When the optical fiber macrobend loss test is carried out at present, the two ends of the tested optical fiber are respectively fixed on the light output port and the light receiving port of a test system, a single cylindrical die is used, the optical fiber is unidirectionally and repeatedly surrounded on a cylinder, and then the optical fiber is fixed by an article for measurement. However, in the actual fiber winding process, certain instability is generated in the test process due to the self stress springing-off after the optical fiber is bent and the torsion phenomenon generated after the optical fiber is wound in a unidirectional mode, new loss is generated, and the accuracy of the measurement result is reduced.
At present, the fiber winding work is usually carried out in a manual winding column winding mode, and the efficiency and the convenience are insufficient in large-scale production measurement. Moreover, the winding mode and state of each person are different, and the final result of the test is different due to factors such as the flatness and tightness of the flat cable. Therefore, additional influences caused by manual fiber winding method inconsistency, winding flatness and winding tightness inconsistency need to be solved, and test stability and accuracy are improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a winding fine device of precision measurement optic fibre macrobend loss in order to overcome the problem that there is inefficiency and convenience not enough in the manual wrapping post winding optic fibre among the above-mentioned background art.
The utility model provides a fine device of winding of accurate measurement optic fibre macrobend loss, include:
the lower fiber winding unit comprises a bottom plate and a plurality of first fiber winding columns, the first fiber winding columns are vertically connected to the bottom plate, and the first fiber winding columns are arranged in an array at equal intervals along the length direction of the bottom plate;
the upper fiber winding unit comprises a top plate and a plurality of second fiber winding columns, the second fiber winding columns are vertically connected with the top plate, the second fiber winding columns are arranged in an array mode at equal intervals along the length direction of the top plate, the first fiber winding columns and the second fiber winding columns are arranged in a staggered mode, and fiber winding gaps are formed between every two adjacent first fiber winding columns;
the driving unit is used for driving the upper fiber winding unit to linearly move relative to the lower fiber winding unit;
and the fiber feeding unit is used for clamping the optical fiber to move in the directions of the upward fiber winding unit and the downward fiber winding unit.
The preferred scheme is as follows: the bottom plate and the top plate are parallel to each other and arranged at intervals, a linear guide rail and a sliding block are arranged between the bottom plate and the top plate, the linear guide rail is fixedly connected to the top of the bottom plate, the length direction of the linear guide rail is parallel to the width direction of the bottom plate, the sliding block is fixedly connected to the bottom of the top plate, and the top plate moves linearly on the bottom plate through the sliding block and the linear guide rail.
The preferred scheme is as follows: the top plate is provided with a plurality of first guide holes for penetrating the fiber winding columns, the first fiber winding columns are respectively located in the guide holes, the guide holes are elongated holes, and the length directions of the guide holes are parallel to the width direction of the bottom plate.
The preferred scheme is as follows: the driving unit is a linear module, the linear module is connected between the upper fiber winding unit and the lower fiber winding unit, and the linear module drives the upper fiber winding unit to do reciprocating linear motion along the width direction of the bottom plate.
The preferred scheme is as follows: the driving unit comprises a first motor and a circular turntable, the first motor is fixedly connected to the bottom plate, the circular turntable is connected with the first motor, an eccentric shaft is arranged on the circular turntable, a bearing in sliding connection with the top plate is arranged on the eccentric shaft, a guide groove connected with the bearing is arranged at the bottom of the top plate, and the bearing reciprocates linearly in the guide groove.
The preferred scheme is as follows: the fiber feeding unit comprises a driving wheel and a driven wheel, the driving wheel and the driven wheel are rotatably connected to the top plate, the driving wheel is provided with a second motor, the second motor is fixedly connected with the top plate, and a fiber feeding channel for clamping optical fibers is arranged between the driving wheel and the driven wheel.
The preferred scheme is as follows: the first fiber winding column and the second fiber winding column are both cylinders, the diameters of the first fiber winding column and the second fiber winding column are 5-30 mm, and the length of the fiber winding gap is larger than the diameter of a single optical fiber and smaller than the sum of the diameters of two optical fibers.
The preferred scheme is as follows: the diameters of the first fiber winding column and the second fiber winding column are any one of 5mm, 10mm, 15mm, 25mm and 30 mm.
The preferred scheme is as follows: the clamp plate is characterized in that the top plate is further provided with a clamp plate and a clamp plate positioning block, a sponge layer is arranged between the clamp plate and the top plate, the clamp plate positioning block is provided with a clamp groove for clamping the clamp plate, and the clamp plate positioning block is fixedly connected with the top plate.
The preferred scheme is as follows: the bottom plate is provided with a limiting block, the limiting block is fixedly connected to the side wall of the bottom plate, and the limiting block is used for limiting the stroke range of the top plate.
On the basis of the above technical scheme, compare with prior art, the utility model has the advantages as follows:
the utility model discloses a fine device of winding of accurate measurement optic fibre macrobend loss, should wind fine device set up down around fine unit and go up around fine unit, be equipped with the first fine post of winding of a plurality of winding optic fibre on the bottom plate of fine unit under around, be equipped with the second of a plurality of winding optic fibre on the roof of fine unit at last around fine post, a plurality of first wind fine post and a plurality of second around fine post crisscross array each other arrange, and adjacent first wind fine post and second around being equipped with around fine clearance between the fine post. When the optical fiber is fed, the driving unit drives the upper fiber winding unit to linearly move relative to the lower fiber winding unit, so that the first fiber winding columns and the second fiber winding columns are separated from each other, and the optical fiber to be measured is moved between the first fiber winding columns and the second fiber winding columns through the optical fiber feeding unit. When the optical fiber is wound, the driving unit drives the upper optical fiber winding unit to linearly move relative to the lower optical fiber winding unit, so that the first optical fiber winding columns and the second optical fiber winding columns are close to each other until the first optical fiber winding columns and the second optical fiber winding columns are staggered with each other, and the optical fiber to be tested is wound between the first optical fiber winding columns and the second optical fiber winding columns in a bending mode. And finally, reversely drawing the optical fiber to be detected through the fiber feeding unit, reducing the gap between the optical fiber to be detected and the first fiber winding columns and the second fiber winding columns, and enabling the optical fiber to be detected to be tightly attached to the first fiber winding columns and the second fiber winding columns. The fiber winding device realizes automatic fiber winding, avoids the influence on the test result caused by different testing methods of personnel, ensures the stability of the optical fiber test state, improves the test precision and improves the test speed.
Drawings
FIG. 1 is a front view of the structure of the embodiment of the present invention;
fig. 2 is a top view of the structure of an embodiment of the present invention;
fig. 3 is a perspective view of the embodiment of the present invention.
Reference numerals: 10-lower fiber winding unit, 11-bottom plate, 12-first fiber winding column, 13-limiting block, 20-upper fiber winding unit, 21-top plate, 22-second fiber winding column, 23-guide hole, 24-pressing plate, 25-pressing plate positioning block, 31-linear guide rail, 32-sliding block, 40-fiber feeding unit, 41-driving wheel and 42-driven wheel.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. It is to be noted that all the figures are exemplary representations. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
Example 1
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a winding fiber device for accurately measuring macro-bending loss of an optical fiber, including:
the lower fiber winding unit 10 comprises a bottom plate 11 and a first fiber winding column 12, wherein the first fiber winding column 12 is vertically connected above the bottom plate 11, and the bottom plate 11 is a rectangular plate. The first fiber winding columns 12 are provided in a plurality, the specific number of the first fiber winding columns 12 is specifically set according to actual measurement needs, and the first fiber winding columns 12 are arranged in a linear array at equal intervals along the length direction of the bottom plate 11.
The upper fiber winding unit 20 comprises a top plate 21 and a second fiber winding column 22, the second fiber winding column 22 is vertically connected with the top plate 21, and the top plate 21 is a rectangular plate. The number of the second fiber winding columns 22 is multiple, the specific number of the second fiber winding columns 22 is specifically set according to actual measurement needs, and the multiple second fiber winding columns 22 are arrayed in a straight line shape at equal intervals along the length direction of the top plate 21. The first fiber winding columns 12 and the second fiber winding columns 22 are arranged in a staggered mode, and fiber winding gaps are arranged between the adjacent first fiber winding columns 12 and the adjacent second fiber winding columns 12. A plurality of guide holes 23 for penetrating the first fiber winding columns 12 are formed in the top plate 21, the first fiber winding columns 12 are respectively located in the guide holes 23, the guide holes 23 are elongated holes, and the length direction of the guide holes 23 is parallel to the width direction of the bottom plate 11.
A driving unit (not shown in the figure) for driving the upper fiber winding unit 20 to move linearly with respect to the lower fiber winding unit 10; when feeding, the driving unit drives the upper fiber winding unit 20 to move linearly relative to the lower fiber winding unit 10, so that the plurality of first fiber winding columns 12 and the plurality of second fiber winding columns 22 are separated from each other. When winding the fiber, the driving unit drives the upper fiber winding unit 20 to move linearly relative to the lower fiber winding unit 10, so that the plurality of first fiber winding columns 12 and the plurality of second fiber winding columns 22 approach to each other until the plurality of first fiber winding columns 12 and the plurality of second fiber winding columns 22 are staggered with each other, and the fiber to be tested is bent and wound between the plurality of first fiber winding columns 12 and the plurality of second fiber winding columns 22.
And the fiber feeding unit 40 is used for clamping the optical fiber to move in the directions of the upward fiber winding unit 10 and the downward fiber winding unit 20 and moving the optical fiber to be tested between the first fiber winding columns 12 and the second fiber winding columns 22.
Principle of operation
The utility model discloses a fine device of winding of accurate measurement optic fibre macrobend loss, should wind fine device set up down around fine unit 10 and go up around fine unit 20, be equipped with the first fine post 12 of winding of a plurality of winding optic fibre on the bottom plate 11 of fine unit 10 under, be equipped with the second of a plurality of winding optic fibre on the roof 21 of fine unit 20 on last around fine post 22, a plurality of first fine post 12 and a plurality of second of winding are crisscross each other and are array range around fine post 22, and adjacent first being equipped with around fine clearance around fine post 12 and second around between fine post 22.
When the optical fiber is fed, the driving unit drives the upper fiber winding unit 20 to move linearly relative to the lower fiber winding unit 10, so that the plurality of first fiber winding columns 12 and the plurality of second fiber winding columns 22 are separated from each other, and the optical fiber to be tested is moved between the plurality of first fiber winding columns 12 and the plurality of second fiber winding columns 22 through the optical fiber feeding unit 40. When winding the fiber, the driving unit drives the upper fiber winding unit 20 to move linearly relative to the lower fiber winding unit 10, so that the plurality of first fiber winding columns 12 and the plurality of second fiber winding columns 22 approach to each other until the plurality of first fiber winding columns 12 and the plurality of second fiber winding columns 22 are staggered with each other, and the fiber to be tested is bent and wound between the plurality of first fiber winding columns 12 and the plurality of second fiber winding columns 22.
Finally, the optical fiber to be tested is pulled reversely by the fiber feeding unit 40, so that the gap between the optical fiber to be tested and the first fiber winding columns 12 and the second fiber winding columns 22 is reduced, and the optical fiber to be tested is tightly attached to the first fiber winding columns 12 and the second fiber winding columns 22. The fiber winding device realizes automatic fiber winding, avoids the influence on the test result caused by different testing methods of personnel, ensures the stability of the optical fiber test state and improves the test precision. The testing speed is improved.
Example 2
Referring to fig. 2 and fig. 3, an embodiment of the present invention provides a fiber winding device for accurately measuring macrobending loss of an optical fiber, and the embodiment is different from embodiment 1 in that: the bottom plate 11 and the top plate 21 are arranged in parallel with each other at an interval, and a linear guide 31 and a slider 32 are provided between the bottom plate 11 and the top plate 21. Two linear guide rails 31 and two slide blocks 32 are respectively arranged, and the two linear guide rails 31 and the two slide blocks 32 are respectively positioned at two ends of the bottom plate 11. The linear guide rail 31 is fixedly connected to the top of the bottom plate 11, the length direction of the linear guide rail 31 is parallel to the width direction of the bottom plate 11, the slider 32 is fixedly connected to the bottom of the top plate 21, and the top plate 21 moves linearly on the bottom plate 11 through the slider 32 and the linear guide rail 31. The linear guide rail 31 and the sliding block 32 are connected between the bottom plate 11 and the top plate 21, the linear guide rail 31 and the sliding block 32 have high machining precision and high linearity, the running track of the top plate 21 is convenient to control, and the measuring precision is improved.
Example 3
The embodiment of the utility model provides a fine device of winding of accurate measurement optic fibre macrobend loss, the difference of this embodiment and embodiment 1 lies in: the driving unit is a linear module (not shown in the figure) connected between the upper fiber winding unit 20 and the lower fiber winding unit 10, and the linear module drives the upper fiber winding unit 20 to reciprocate linearly along the width direction of the bottom plate 11. The linear module is an ideal product which converts rotary motion into linear motion or converts linear motion into rotary motion by utilizing a ball screw. The ball screw, which is composed of a screw, a nut and balls, functions to convert a rotational motion into a linear motion, and is widely used in various industrial devices and precision instruments due to its small frictional resistance. High-precision linear motion can be realized under the condition of high load.
Example 4
The embodiment of the utility model provides a fine device of winding of accurate measurement optic fibre macrobend loss, the difference of this embodiment and embodiment 1 lies in: the driving unit comprises a first motor (not shown in the figure) and a circular turntable (not shown in the figure), the first motor is fixedly connected to the bottom plate 11, and the circular turntable is connected with the first motor. An eccentric shaft (not shown) is arranged on the circular turntable, a bearing (not shown) connected with the top plate in a sliding mode is arranged on the eccentric shaft, a guide groove (not shown) connected with the bearing is formed in the bottom of the top plate, and the bearing moves in a reciprocating linear mode in the guide groove. The first motor drives the circular turntable and the eccentric shaft to rotate and convert the circular turntable and the eccentric shaft into reciprocating linear motion of the upper fiber winding unit 20 along the width direction of the bottom plate 11.
Example 5
Referring to fig. 2 and fig. 3, an embodiment of the present invention provides a fiber winding device for accurately measuring macrobending loss of an optical fiber, and the embodiment is different from embodiment 1 in that: the fiber feeding unit 40 comprises a driving wheel 41 and a driven wheel 42, the driving wheel 41 and the driven wheel 42 are rotatably connected to the top plate 21, and the distance between the driving wheel 41 and the driven wheel 42 is adjustable. The driving wheel 41 is provided with a second motor (not shown in the figure), the second motor is fixedly connected with the top plate 21, and the second motor is used for driving the driving wheel 41 to rotate. A fiber feeding channel for clamping optical fibers is arranged between the driving wheel 41 and the driven wheel 42, the optical fibers are clamped between the driving wheel 41 and the driven wheel 42, and when the driving wheel 41 is driven by the second motor to rotate, the driven wheel 42 can automatically feed the fibers by extruding and following the driving wheel 41 to rotate.
Example 6
The embodiment of the utility model provides a fine device of winding of accurate measurement optic fibre macrobend loss, the difference of this embodiment and embodiment 1 lies in: the first fiber winding column 12 and the second fiber winding column 22 are both cylinders, the diameters of the first fiber winding column 12 and the second fiber winding column 22 are 5-30 mm, the diameters of the first fiber winding column 12 and the second fiber winding column 22 are any one of 5mm, 10mm, 15mm, 25mm and 30mm, and the specific diameters of the first fiber winding column 12 and the second fiber winding column 22 can be specifically selected by a person skilled in the art according to actual measurement needs. The length of the fiber winding gap between the adjacent first fiber winding column 12 and the second fiber winding column 12 is larger than the diameter of a single optical fiber to be detected and smaller than the sum of the diameters of two optical fibers to be detected, so that the detection precision is ensured.
Example 7
Referring to fig. 2 and fig. 3, an embodiment of the present invention provides a fiber winding device for accurately measuring macrobending loss of an optical fiber, and the embodiment is different from embodiment 1 in that: still be equipped with clamp plate 24 and clamp plate locating piece 25 on roof 21, be equipped with the sponge layer between clamp plate 24 and the roof 21, the sponge layer is used for protecting the top layer of optic fibre, and clamp plate 24 is used for restricting optic fibre to take place the warpage. A clamping groove for clamping the pressing plate 24 is formed in the pressing plate positioning block 25, and the pressing plate positioning block 25 is fixedly connected with the top plate 21. The bottom plate 11 is provided with a limiting block 13, the limiting block 13 is fixedly connected to the side wall of the bottom plate 11, and the limiting block 13 is used for limiting the stroke range of the top plate 21, so that the first fiber winding column 12 and the plurality of second fiber winding columns 22 are in a straight line when the fibers are wound.
Various modifications and variations of the embodiments of the present invention may be made by those skilled in the art, and they are within the scope of the present invention provided they are within the scope of the claims and their equivalents.
What is not described in detail in the specification is prior art that is well known to those skilled in the art.
Claims (10)
1. A winding device for accurately measuring macrobending loss of an optical fiber is characterized by comprising:
the lower fiber winding unit (10) comprises a bottom plate (11) and a plurality of first fiber winding columns (12), wherein the first fiber winding columns (12) are vertically connected to the bottom plate (11), and the first fiber winding columns (12) are arranged in an array at equal intervals along the length direction of the bottom plate (11);
the upper fiber winding unit (20) comprises a top plate (21) and a plurality of second fiber winding columns (22), the second fiber winding columns (22) are vertically connected with the top plate (21), the second fiber winding columns (22) are arranged in a plurality of rows, the second fiber winding columns (22) are arrayed in an equidistant mode along the length direction of the top plate (21), the first fiber winding columns (12) and the second fiber winding columns (22) are arranged in a staggered mode, and fiber winding gaps are arranged between the adjacent first fiber winding columns (12) and the second fiber winding columns (22);
the driving unit is used for driving the upper fiber winding unit (20) to move linearly relative to the lower fiber winding unit (10);
the fiber feeding unit (40), the fiber feeding unit (40) is used for clamping the optical fiber to move in the direction of the upward fiber winding unit (20) and the downward fiber winding unit (10).
2. The fiber winding device for accurately measuring the macrobending loss of the optical fiber according to claim 1, wherein:
bottom plate (11) and roof (21) are parallel to each other and the interval sets up, are equipped with linear guide (31) and slider (32) between bottom plate (11) and roof (21), linear guide (31) fixed connection is at the top of bottom plate (11), the length direction of linear guide (31) is parallel with the width direction of bottom plate (11), slider (32) fixed connection is in the bottom of roof (21), roof (21) are through slider (32) and linear guide (31) linear motion on bottom plate (11).
3. The fiber winding device for accurately measuring the macrobending loss of the optical fiber according to claim 1, wherein:
set up a plurality of guiding holes (23) that are used for penetrating a plurality of first fine posts (12) of winding on roof (21), a plurality of first fine posts (12) of winding are located guiding hole (23) respectively, guiding hole (23) are the slotted hole, and the length direction of guiding hole (23) is parallel with the width direction of bottom plate (11).
4. The fiber winding device for accurately measuring the macrobending loss of the optical fiber according to claim 1, wherein:
the driving unit is a linear module, the linear module is connected between the upper fiber winding unit (20) and the lower fiber winding unit (10), and the linear module drives the upper fiber winding unit (20) to do reciprocating linear motion along the width direction of the bottom plate (11).
5. The fiber winding device for accurately measuring the macrobending loss of the optical fiber according to claim 1, wherein:
the driving unit comprises a first motor and a circular turntable, the first motor is fixedly connected to the bottom plate (11), the circular turntable is connected with the first motor, an eccentric shaft is arranged on the circular turntable, a bearing in sliding connection with the top plate (21) is arranged on the eccentric shaft, a guide groove connected with the bearing is formed in the bottom of the top plate (21), and the bearing reciprocates linearly in the guide groove.
6. The fiber winding device for accurately measuring the macrobending loss of the optical fiber according to claim 1, wherein:
send fine unit (40) including action wheel (41) and follow driving wheel (42), action wheel (41) and follow driving wheel (42) rotate to be connected on roof (21), action wheel (41) are equipped with the second motor, second motor and roof (21) fixed connection, be equipped with the fine passageway of walking of centre gripping optic fibre between action wheel (41) and follow driving wheel (42).
7. The fiber winding device for accurately measuring the macrobending loss of the optical fiber according to claim 1, wherein:
the first fiber winding column (12) and the second fiber winding column (22) are both cylinders, the diameters of the first fiber winding column (12) and the second fiber winding column (22) are 5-30 mm, and the length of the fiber winding gap is larger than the diameter of a single optical fiber and smaller than the sum of the diameters of the two optical fibers.
8. The fiber winding device for accurately measuring macrobending loss of the optical fiber according to claim 7, wherein:
the diameters of the first fiber winding column (12) and the second fiber winding column (22) are any one of 5mm, 10mm, 15mm, 25mm and 30 mm.
9. The fiber winding device for accurately measuring the macrobending loss of the optical fiber according to claim 1, wherein:
the clamp plate is characterized in that a clamp plate (24) and a clamp plate positioning block (25) are further arranged on the top plate (21), a sponge layer is arranged between the clamp plate (24) and the top plate (21), a clamping groove for clamping the clamp plate (24) is formed in the clamp plate positioning block (25), and the clamp plate positioning block (25) is fixedly connected with the top plate (21).
10. The fiber winding device for accurately measuring the macrobending loss of the optical fiber according to claim 1, wherein:
the roof structure is characterized in that a limiting block (13) is arranged on the bottom plate (11), the limiting block (13) is fixedly connected to the side wall of the bottom plate (11), and the limiting block (13) is used for limiting the stroke range of the roof (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020050790.5U CN211262661U (en) | 2020-01-10 | 2020-01-10 | Fiber winding device for accurately measuring macrobending loss of optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020050790.5U CN211262661U (en) | 2020-01-10 | 2020-01-10 | Fiber winding device for accurately measuring macrobending loss of optical fiber |
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| CN211262661U true CN211262661U (en) | 2020-08-14 |
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| CN202020050790.5U Active CN211262661U (en) | 2020-01-10 | 2020-01-10 | Fiber winding device for accurately measuring macrobending loss of optical fiber |
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