Optical fiber attenuator easy to adjust

Abstract

The utility model relates to the technical field of optical fiber attenuators, and discloses an easy-to-adjust optical fiber attenuator which comprises an optical fiber attenuator body, an adjusting bolt is arranged on the front side of the optical fiber attenuator body, a movable groove is formed in the rear side of the optical fiber attenuator body, and a first nut is fixedly connected to the rear side of an inner cavity of the movable groove in a sleeved mode. A containing groove is formed in the front side of the first nut, an inner cavity of the containing groove is movably connected with a first rotating ring in a sleeved mode, and a telescopic rod is fixedly installed on the front side of the first rotating ring. According to the optical fiber attenuator easy to adjust, the optical fiber attenuator body is connected with the adjusting bolt through the first nut and the second nut, the telescopic rod and the spring are connected between the first nut and the second nut, and the thread in the second nut can be attached to the thread side wall on the adjusting bolt through the elastic force of the spring; when the adjusting bolt is used for controlling the light path, the axial clearance can be automatically compensated, continuous pre-tightening force is provided through elastic deformation, and it is ensured that the light path is stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical fiber attenuator technical field, specifically be easy to adjust optical fiber attenuator. BACKGROUND

[0002] Adjustable optical fiber attenuator is usually composed of input optical fiber, output optical fiber, collimating lens, shielding sheet and adjusting mechanism. The shielding sheet can be sheet-shaped or conical, and the position of the shielding sheet in the light path is changed through translation or rotation of the mechanical structure, so that the attenuation of the optical signal is realized. When the shielding sheet is inserted into the light path, a part of the light beam will be shielded, so that the intensity of the light passing through is weakened, and the purpose of attenuating the optical signal is achieved. By adjusting the position of the shielding sheet, the degree of shielding can be changed, so that different attenuation amounts are realized. At the same time, the adjusting mechanism mostly adopts bolts, which is convenient for adjusting the position of the shielding sheet.

[0003] The adjusting mechanism (bolt) will be worn out after long-term use, and the thread gap of the adjusting mechanism (bolt) will become larger, which may cause the attenuation amount after each adjustment to be inconsistent, or the precision to decrease after long-term use. At this time, it may be necessary to consider how to reduce the gap of the mechanical parts. SUMMARY

[0004] The utility model discloses a kind of optical fiber attenuators of easy adjustment, to solve the problem raised in above-mentioned background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of optical fiber attenuator of easy adjustment, including optical fiber attenuator body, the front side of the optical fiber attenuator body is equipped with adjusting bolt, the rear side of the optical fiber attenuator body is equipped with movable slot, the rear side of the movable slot inner cavity is fixedly sleeved with first nut, the front side of the first nut is equipped with placing groove, the inner cavity of the placing groove is movably sleeved with first rotating ring, the front side of the first rotating ring is fixedly installed with telescopic rod, the front end of the telescopic rod is fixedly installed with second nut, the outer side of the telescopic rod is movably sleeved with spring, the two ends of the spring are fixedly installed respectively at the front side of first rotating ring and the rear side of second nut, the adjusting bolt is respectively threadedly connected in the inner cavity of first nut and the inner cavity of second nut.

[0006] As a further improvement of the utility model, the front side of the movable slot inner cavity is fixedly sleeved with third nut, the inner cavity of the third nut is threadedly connected with external thread sleeve, the inner cavity of the external thread sleeve is movably sleeved on the outer side of second nut.

[0007] As a further improvement of the utility model, the inner cavity of the external thread sleeve is equipped with rotary groove, the outer side of the second nut is equipped with second rotating ring located in the inner cavity of rotary groove.

[0008] As a further improvement of the utility model, the front side of the outer thread sleeve is fixedly provided with a control handle, and the front side of the outer thread sleeve is provided with a plurality of control handles which are uniformly distributed along the circumference of the outer thread sleeve.

[0009] As a further improvement of the utility model, the rear side of the fiber attenuator body is movably connected with a bellows with rotational freedom, and the front side of the bellows is rotatably connected with the rear side of the adjusting bolt head.

[0010] As a further improvement of the utility model, the control handle is in L shape, and one end of the control handle extends out of the outer side of the bellows.

[0011] As a further improvement of the utility model, the first rotating ring and the second nut are provided with a plurality of telescopic rods and springs, and the plurality of telescopic rods and springs are uniformly distributed along the circumference of the first rotating ring.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. The fiber attenuator easy to adjust, through the fiber attenuator body utilizes the first nut and the second nut and is connected with the adjusting bolt, and the first nut and the second nut are connected with the telescopic rod and the spring between, utilizes the elastic force of spring, can be with the thread in the second nut and the thread side wall on the adjusting bolt, when utilizing the adjusting bolt control light path can automatically compensate axial gap, through the elastic deformation provides the continuous pre-tightening force, ensures the light path stability.

[0014] 2. The fiber attenuator easy to adjust, the outer side of the adjusting bolt is provided with the bellows, utilizes the bellows and can protect the thread outside the bellows, can reduce the dust or humidity from the adjusting bolt and the fiber attenuator body connection place into the inside structure corrosion to the adjusting bolt and the fiber attenuator body, improves the service life. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 It is the whole structure schematic diagram of the utility model easy to adjust fiber attenuator;

[0017] Figure 2 It is the movable groove structure schematic diagram of the utility model easy to adjust fiber attenuator;

[0018] Figure 3 It is the internal structure diagram of the movable groove of the optical fiber attenuator easy to adjust of the utility model;

[0019] Figure 4 It is the explosion view between the placing groove and the first rotating ring of the optical fiber attenuator easy to adjust of the utility model.

[0020] In the drawing: 1, optical fiber attenuator body; 2, adjusting bolt; 3, bellows; 4, movable groove; 5, first nut; 6, placing groove; 7, first rotating ring; 8, telescopic rod; 9, second nut; 10, spring; 11, second rotating ring; 12, external thread sleeve; 13, rotating groove; 14, third nut; 15, control handle. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] Please refer to Figures 1-4 The utility model provides a kind of optical fiber attenuator easy to adjust, including optical fiber attenuator body 1, the front side of optical fiber attenuator body 1 is equipped with adjusting bolt 2, the rear side of optical fiber attenuator body 1 is equipped with movable groove 4, the rear side of movable groove 4 inner chamber is fixedly sleeved with first nut 5, the front side of first nut 5 is equipped with placing groove 6, the inner chamber of placing groove 6 is movably sleeved with first rotating ring 7, the front side of first rotating ring 7 is fixedly installed with telescopic rod 8, the front end of telescopic rod 8 is fixedly installed with second nut 9, the outer side of telescopic rod 8 is movably sleeved with spring 10, the both ends of spring 10 are fixedly installed at the front side of first rotating ring 7 and the rear side of second nut 9 respectively, adjusting bolt 2 is respectively threadedly connected in the inner chamber of first nut 5 and the inner chamber of second nut 9. By the connection of first nut 5 and second nut 9 with adjusting bolt 2 using optical fiber attenuator body 1, and telescopic rod 8 and spring 10 are connected between first nut 5 and second nut 9, using the elastic force of spring 10, the thread in second nut 9 can be attached with the thread side wall on adjusting bolt 2, when controlling light path using adjusting bolt 2, axial gap can be automatically compensated, provide continuous pre-tightening force by elastic deformation, ensure light path stability.

[0023] In this embodiment, the third nut 14 is movably sleeved on the front side of the inner cavity of the movable groove 4, the outer threaded sleeve 12 is threadedly connected in the inner cavity of the third nut 14, and the outer side of the second nut 9 is movably sleeved in the inner cavity of the outer threaded sleeve 12. The outer threaded sleeve 12 and the third nut 14 are further arranged on the outer side of the second nut 9, so that the outer threaded sleeve 12 is rotated by the rotating control handle 15, the distance between the second nut 9 and the first nut 5 is adjusted due to the threaded connection between the outer threaded sleeve 12 and the third nut 14, the distance between the second nut 9 and the first nut 5 is adjusted according to the gap between the second nut 9 and the adjusting bolt 2, the thread on the second nut 9 is always matched with the thread on the adjusting bolt 2, the error of the position of the adjusting bolt 2 is avoided, and the stability of the moving position of the shielding piece is improved.

[0024] In this embodiment, the inner cavity of the outer threaded sleeve 12 is provided with a rotating groove 13, and the outer side of the second nut 9 is provided with a second rotating ring 11 located in the inner cavity of the rotating groove 13. The outer threaded sleeve 12 is connected with the second nut 9 by the rotating groove 13 and the second rotating ring 11, so that the outer threaded sleeve 12 can rotate without rotating the second nut 9, and can move forward and backward.

[0025] In this embodiment, the control handle 15 is fixedly installed on the front side of the outer threaded sleeve 12, and a plurality of control handles 15 are uniformly distributed along the circumference of the outer threaded sleeve 12. The control handle 15 is arranged on the front side of the outer threaded sleeve 12, so that the outer threaded sleeve 12 is rotated by the control handle 15.

[0026] In this embodiment, the rear side of the optical fiber attenuator body 1 is movably connected with a bellows 3 having a rotating degree of freedom, and the front side of the bellows 3 is rotatably connected with the rear side of the head of the adjusting bolt 2. The bellows 3 is arranged on the outer side of the adjusting bolt 2, and the thread on the outer side of the bellows 3 is protected, so that the dust or moisture from the outside can not enter the connection between the adjusting bolt 2 and the optical fiber attenuator body 1 to corrode the internal structure of the adjusting bolt 2 and the optical fiber attenuator body 1, and the service life is improved.

[0027] In this embodiment, the control handle 15 is in L shape, and one end of the control handle 15 extends from the outer side of the bellows 3. The shape of the control handle 15 is convenient for the operator to operate the control handle 15.

[0028] In this embodiment, the first rotating ring 7 and the second nut 9 are provided with a plurality of telescopic rods 8 and springs 10, and the plurality of telescopic rods 8 and springs 10 are uniformly distributed along the circumference of the first rotating ring 7. The plurality of telescopic rods 8 and springs 10 are arranged between the first rotating ring 7 and the second nut 9, so as to provide sufficient elastic force for the thread on the second nut 9 to match the thread on the adjusting bolt 2.

[0029] Working principle: when using the device, the position of the shielding piece in the light path is changed by rotating the adjusting bolt 2 to drive the shielding piece to move, so as to realize the attenuation of the light signal;

[0030] After long-term use, the threads in the second nut 9 and the threads on the outside of the adjusting bolt 2 are worn, resulting in a large gap between them. By rotating the control handle 15 to drive the outer threaded sleeve 12 to rotate, the position of the outer threaded sleeve 12 in the third nut 14 is adjusted, thereby adjusting the position of the second nut 9 from the placement groove 6, so that the inner threads on the second nut 9 are in close contact with the outer threads on the adjusting bolt 2, so that the adjusting bolt 2 can rotate more stably.

[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An easily adjustable optical fiber attenuator comprising an optical fiber attenuator body (1), characterized in that, The front side of the optical fiber attenuator body (1) is provided with an adjusting bolt (2), the rear side of the optical fiber attenuator body (1) is provided with a movable slot (4), the rear side of the inner cavity of the movable slot (4) is fixedly sleeved with a first nut (5), the front side of the first nut (5) is provided with a placing slot (6), the inner cavity of the placing slot (6) is movably sleeved with a first rotating ring (7), the front side of the first rotating ring (7) is fixedly installed with an extension rod (8), the front end of the extension rod (8) is fixedly installed with a second nut (9), the outer side of the extension rod (8) is movably sleeved with a spring (10), the two ends of the spring (10) are fixedly installed on the front side of the first rotating ring (7) and the rear side of the second nut (9) respectively, and the adjusting bolt (2) is threadedly connected in the inner cavities of the first nut (5) and the second nut (9) respectively.

2. An easily adjustable fiber optic attenuator according to claim 1, wherein, The front side of the inner cavity of the movable slot (4) is fixedly sleeved with a third nut (14), the inner cavity of the third nut (14) is threadedly connected with an external thread sleeve (12), and the inner cavity of the external thread sleeve (12) is movably sleeved on the outer side of the second nut (9).

3. An easily adjustable fiber optic attenuator according to claim 2, wherein, The inner cavity of the external thread sleeve (12) is provided with a rotating groove (13), and the outer side of the second nut (9) is provided with a second rotating ring (11) located in the inner cavity of the rotating groove (13).

4. An easily adjustable fiber optic attenuator as set forth in claim 2, wherein, The front side of the external thread sleeve (12) is fixedly installed with a control handle (15), and the front side of the external thread sleeve (12) is provided with a plurality of control handles (15) uniformly distributed along the circumference of the external thread sleeve (12).

5. An easily adjustable optical fiber attenuator according to claim 4, wherein, The rear side of the optical fiber attenuator body (1) is movably connected with a bellows (3) having rotational freedom, and the front side of the bellows (3) is movably connected with the rear side of the head of the adjusting bolt (2).

6. An easily adjustable optical fiber attenuator according to claim 5, wherein, The control handle (15) is in L shape, and one end of the control handle (15) extends out from the outer side of the bellows (3).

7. An easily adjustable fiber optic attenuator as set forth in claim 1, wherein, The first rotating ring (7) and the second nut (9) are provided with a plurality of extension rods (8) and springs (10), and the plurality of extension rods (8) and springs (10) are uniformly distributed along the circumference of the first rotating ring (7).

Images