CN214122529U - Optical fiber adapter - Google Patents

Abstract

The utility model discloses an optical fiber adapter, including an shell, an inner shell, a protecgulum and a sunshade. The housing defines a front chamber and a passage. The inner shell is arranged in the front cavity and is provided with a rear wall, a bottom wall extending forwards from the bottom of the rear wall, a top wall extending forwards from the top of the rear wall and two side walls respectively extending forwards from the opposite side of the rear wall and connected between the bottom wall and the top wall, the rear wall defines a through hole aligned with the channel, and an avoiding space is formed between the bottom wall and the two side walls. The front cover is fixedly connected with the shell and defines an opening which is communicated with the front cavity and is aligned with the through hole, and the front cover and the shell define a pivoting space together. The shielding plate can be pivotally arranged in the pivoting space to close or open the opening and is provided with a free end part which can move in the avoiding space.

Description

Optical fiber adapter

Technical Field

The utility model relates to an optical fiber adapter especially relates to an optical fiber adapter for supplying fiber connector to connect.

Background

U.S. patent No. US7,785,018B2 discloses that a ferrule holder of a fiber optic adapter is positioned between two chambers of a body, the ferrule holder being configured for receiving a ferrule alignment ferrule therein. Generally, the ferrule holder and the ferrule alignment sleeve are axially aligned along a longitudinal axis of the body to receive a portion of a ferrule of a corresponding fiber optic connector during mating.

Because the thickness of one vertical wall of the sleeve seat is thin, the overall structure of the sleeve seat is poor in strength and not firm enough. In addition, when the casing seat is installed in the main body, the two opposite sides of the vertical wall are not easy to be firmly attached to the inner wall surfaces of the two opposite sides of the main body, so that the casing seat is easy to shake or deflect after being installed. Furthermore, because no fool-proof member is arranged between the cannula holder and the main body, a user can easily mistakenly install the cannula holder in the main body after rotating the cannula holder 180 degrees around the longitudinal axis.

SUMMERY OF THE UTILITY MODEL

It is therefore one of the objects of the present invention to provide a fiber optic adapter that overcomes at least one of the disadvantages of the prior art.

Therefore, the optical fiber adapter of the present invention includes an outer shell, at least one inner shell, a front cover, and at least one shielding plate.

The housing defines at least one front chamber and at least one passage in communication with the front chamber. The inner shell is arranged in the front cavity and is provided with a rear wall, a bottom wall extending forwards from the bottom of the rear wall, a top wall extending forwards from the top of the rear wall and two side walls respectively extending forwards from the opposite side of the rear wall and connecting the bottom wall and the top wall, the rear wall defines at least one through hole aligned with the channel, and an avoiding space is formed between the bottom wall and the two side walls. The front cover is fixedly connected with the shell and defines at least one opening which is communicated with the front cavity and is aligned with the through hole, and the front cover and the shell define at least one pivoting space together. The shutter can be pivotally arranged in the pivoting space to close or open the opening, and the shutter is provided with a free end part capable of moving in the avoiding space.

In some embodiments, the outer shell has a stop at the bottom of the front chamber for stopping the top wall to prevent the inner shell from being reversely installed in the front chamber.

In some embodiments, the stopper is an elongated rail, and the bottom wall forms an elongated slot slidably connected to the stopper.

In some embodiments, the outer shell has an elongated rail, and the inner shell forms an elongated slot slidably connected to the elongated rail.

In some embodiments, the housing further defines a rear chamber in communication with the passage, the housing having a dividing wall between the front chamber and the rear chamber, the dividing wall defining the passage.

In some embodiments, the device further comprises a sleeve disposed at least within the channel.

In some embodiments, the sleeve extends into the via.

In some embodiments, the front cover has a bottom portion and a top portion, the opening is configured for a fiber optic connector to pass through so as to be inserted into the inner housing, the opening has a lower opening portion adjacent to the bottom portion and an upper opening portion adjacent to the top portion, the lower opening portion is configured for a housing member of the fiber optic connector to pass through, and the upper opening portion is configured for a locking member of the fiber optic connector to pass through.

In some embodiments, the bottom is formed with a pivot slot, the shielding plate has a plate body for closing or opening the opening and capable of moving in the avoiding space, and a rotating shaft formed at a front end of the plate body and pivoted to the pivot slot, the plate body has the free end opposite to the rotating shaft.

In some embodiments, the shroud recess forms a recess groove for avoiding a ferrule of the fiber optic connector.

In some embodiments, the front cover has a bottom and a top, the bottom is formed with a pivot slot, the shielding plate has a plate body for closing or opening the opening and capable of moving in the avoiding space, and a rotating shaft formed at a front end of the plate body and pivoted to the pivot slot, the plate body has the free end opposite to the rotating shaft.

In some embodiments, each of the side walls has an arc-shaped front edge that is concave backward, the front edge extends from top to bottom and curves backward, and the avoiding space is formed between the two front edges of the two side walls and the bottom wall.

In some embodiments, the door further includes a torsion spring, and two ends of the torsion spring abut against the shutter and the front cover respectively, so as to apply an elastic force to the shutter to close the opening.

In some embodiments, the outer housing defines two passages communicating with the front chamber, the rear wall of the inner housing defines two through holes respectively aligned with the two passages, the front cover defines two openings respectively aligned with the two through holes, and the shutter is used for closing or opening the two openings.

In some embodiments, the housing is a conductive housing.

In some embodiments, the housing further comprises a conductive gasket disposed on the housing.

In some embodiments, the outer housing defines two front chambers and four channels, each front chamber communicates with two corresponding channels, the front cover defines four openings, the front cover and the outer housing together define two pivoting spaces, the fiber adapter includes two inner housings and two shutters, the two inner housings are respectively disposed in the two front chambers, the rear wall of each inner housing defines two through holes, each through hole is aligned with the corresponding channel and the corresponding opening, and each shutter can be pivotally disposed in the corresponding pivoting space to close or open the two corresponding openings.

The utility model discloses have following efficiency at least: connect between this end wall and this top wall through these two side walls, can promote the overall structure intensity of this inner shell and make it comparatively firm. Through the surface contact between each side wall outer wall surface and the corresponding side wall inner wall surface, the two side wall outer wall surfaces can be firmly attached to the side wall inner wall surfaces respectively, so that the inner shell can be firmly assembled and positioned in the front cavity and is not easy to shake or deflect. The avoiding space is defined by the two front edges of the two side walls and the bottom wall, so that the shielding plate cannot collide with the inner shell in the pivoting process. The fool-proof component provided by the stop piece and the top wall is matched, so that the effect of preventing the user from mistakenly reversely installing the inner shell in the outer shell can be achieved. The shell and the conductive gasket can play a role of electromagnetic shielding, and the effect of preventing electromagnetic leakage can be achieved.

Drawings

Other features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings, in which:

fig. 1 is an exploded perspective view of a first embodiment of a fiber optic adapter of the present invention and two pairs of fiber optic connectors;

FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1;

FIG. 3 is an exploded perspective view of the first embodiment illustrating the assembled relationship between an outer housing, an inner housing, two sleeves, a front cover, a shutter, a torsion spring, and a conductive washer;

FIG. 4 is an exploded perspective view of the first embodiment from another perspective;

FIG. 5 is a perspective view of the housing of the first embodiment;

FIG. 6 is a cross-sectional view similar to FIG. 2, illustrating a top wall of the inner shell being stopped by a stop of the outer shell when the inner shell is inverted from the outer shell;

FIG. 7 is a partial perspective view of the first embodiment illustrating the assembly of the shield and the torsion spring to the inner housing;

fig. 8 is a perspective view of a second embodiment of the fiber optic adapter of the present invention;

FIG. 9 is an exploded perspective view of the second embodiment; and

fig. 10 is an exploded perspective view of the second embodiment from another perspective.

Description of reference numerals:

100 optical fiber connector

11 casing part

12 locking fastener

13: core insert

200 optical fiber adapter

2: outer casing

21 front case

210 front chamber

211 channel

212 partition wall

213 bottom wall

214 top wall

215 side wall

216 stop member

217 flange

218 sleeve portion

22 rear shell

221 rear chamber

3: inner shell

31 rear wall

311 sleeve part

312 through hole

32 bottom wall

321 long chute

33, top wall

331: wall body

332 frame body

333 space

334 front frame part

34 side wall

341 front edge

35 avoidance space

4: sleeve

5, front cover

51 frame body

511, bottom

512: top

513 opening

514 lower opening part

515 upper opening part

516 pivoting groove

52 bottom plate

53 roof plate

54 pivoting space

6: shielding plate

61: plate body

611, concave groove

612 free end

62: rotating shaft

621 shaft part

7 torsion spring

8: conductive gasket

F is optical fiber

X is the front-back direction

Y is the left-right direction

Z is in the vertical direction

Detailed Description

Before the present invention is described in detail, it should be noted that in the following description, like elements are represented by like reference numerals.

Referring to fig. 1, a first embodiment of a fiber optic adapter 200 of the present invention is adapted to mate two pairs of fiber optic connectors 100, for example. In the first embodiment, each of the optical fiber connectors 100 is, for example, an LC type optical fiber connector, but may be an SC type optical fiber connector or another type of optical fiber connector. Each of the optical fiber connectors 100 includes a housing member 11, a locking member 12 disposed on the top side of the housing member 11, and a ferrule 13 disposed in the housing member 11 and partially protruding out of one end of the housing member 11. The ferrule 13 is used for an optical fiber F to pass through.

Referring to fig. 2, 3, 4 and 5, the fiber optic adapter 200 includes an outer housing 2, an inner housing 3, two ferrules 4, a front cover 5, a shielding plate 6, a torsion spring 7, and a conductive washer 8. The housing 2 is a conductive housing capable of functioning as an electromagnetic shielding (EMI shielding) for mounting to a panel (not shown). The housing 2 of the first embodiment is made of conductive plastic in an integrated manner, and has the advantages of light weight, easy manufacturing and forming, and low manufacturing cost. The housing 2 includes a front case 21 and a rear case 22. The front housing 21 defines a front chamber 210, and two channels 211. The passages 211 communicate with the rear end of the front chamber 210 and are spaced apart in a left-right direction Y. The rear housing 22 is formed at the rear end of the front housing 21 and defines two rear chambers 221, the rear chambers 221 are spaced apart along the left-right direction Y and are respectively communicated with the channels 211, and each rear chamber 221 is used for plugging a corresponding optical fiber connector 100.

Specifically, the front housing 21 has a dividing wall 212, a bottom wall 213, a top wall 214, two side walls 215, a stopper 216, and a flange 217. The partition wall 212 is located between the front chamber 210 and the rear chambers 221, and has two sleeve portions 218 spaced apart in the left-right direction Y and projecting rearward, each of the sleeve portions 218 defining the corresponding passage 211. The bottom wall 213 extends forward from the bottom of the partition wall 212. The top wall 214 extends forward from the top of the partition wall 212 and is spaced apart from the bottom wall 213 along an up-down direction Z. The side walls 215 extend forward from opposite sides of the partition wall 212 and are connected between the bottom wall 213 and the top wall 214, and the side walls 215 are spaced apart along the left-right direction Y. The partition wall 212, the bottom wall 213, the top wall 214, and the side walls 215 collectively define the front chamber 210. The stopper 216 is, for example, an elongated rail protruding from the inner wall surface of the bottom wall 213 and located at the bottom of the front chamber 210, and the length direction of the stopper 216 extends along a front-rear direction X and extends between the front end of the bottom wall 213 and the front wall surface of the partition wall 212. The flange 217 is formed on the outer wall of the bottom wall 213, the outer wall of the top wall 214 and the outer wall of the side walls 215 and is adjacent to the rear housing 22.

Referring to fig. 2, 3 and 4, the inner shell 3 is configured to be disposed in the front chamber 210 and has a rear wall 31, a bottom wall 32 extending forward from the bottom of the rear wall 31, a top wall 33 extending forward from the top of the rear wall 31, and two side walls 34 extending forward from opposite sides of the rear wall 31 and connected between the bottom wall 32 and the top wall 33. The rear wall 31 has two sleeve portions 311 spaced apart from each other in the left-right direction Y and protruding forward, and each of the sleeve portions 311 defines a through hole 312 capable of aligning with and communicating with the corresponding passage 211. The bottom surface of the bottom wall 32 is recessed upwards to form a long sliding slot 321, the long direction of the long sliding slot 321 extends along the front-back direction X, and the long sliding slot 321 can allow the stopper 216 of the housing 2 to penetrate therethrough and can be slidably connected with the stopper 216.

The top wall 33 and the bottom wall 32 are spaced apart along the vertical direction Z and have a wall 331 and a frame 332. The frame 332 is a U-shape with a rear opening, and is formed around the outer periphery of the wall 331 and protrudes out of the top end of the wall 331 and is connected to the top ends of the side walls 34. The frame 332 and the wall 331 define a space 333, and a rear end of the space 333 and a top end of the space 333 are open. The frame 332 has a front frame 334 at the front end of the space 333, and the front frame 334 can be stopped by the stopper 216 of the outer shell 2, thereby preventing the inner shell 3 from being reversely installed in the front chamber 210 in a state where the top wall 33 is turned upside down by 180 degrees.

The side walls 34 are spaced apart from each other along the left-right direction Y, each side wall 34 has an arc-shaped front edge 341 recessed rearward, and the front edge 341 extends from top to bottom and curves rearward, such that the top of the front edge 341 is adjacent to the front frame portion 334 of the frame body 332, and the bottom of the front edge 341 is adjacent to the middle position of the bottom wall 32. An escape space 35 is formed between the front edges 341 of the side walls 34 and the bottom wall 32. The side walls 34 are connected between the bottom wall 32 and the top wall 33, so that the overall structural strength of the inner shell 3 can be improved and the inner shell is relatively strong.

When the inner shell 3 moves along the front-back direction X and is installed in the front chamber 210 of the outer shell 2 in the normal state where the top wall 33 faces upward as shown in fig. 3, the stopper 216 penetrates into the elongated sliding slot 321 and cooperates with the elongated sliding slot 321 to guide the inner shell 3 to slide into the front chamber 210, thereby ensuring that the inner shell 3 does not shake or deflect during sliding, so that the inner shell 3 can be easily and quickly installed in the front chamber 210. When the rear wall 31 of the inner housing 3 contacts and is blocked by the partition wall 212, the inner housing 3 cannot move further and is positioned in the front chamber 210, thereby completing the assembly of the inner housing 3.

At this time, the through holes 312 of the inner housing 3 are aligned with and connected to the passages 211 of the outer housing 2, and the outer wall surfaces of the side walls 34 are respectively contacted with and attached to the inner wall surfaces of the side walls 215. Since the outer wall surfaces of the side walls 34 are in surface contact with the inner wall surfaces of the corresponding side walls 215, the outer wall surfaces of the side walls 34 can be firmly attached to the inner wall surfaces of the side walls 215, respectively. Therefore, the inner shell 3 can be firmly assembled and positioned in the front chamber 210 without shaking or deflection.

Referring to fig. 6, when the inner shell 3 is rotated 180 degrees as shown in fig. 6 and moved in the front-rear direction X in the upside-down state where the top wall 33 faces downward and is reversely installed in the front chamber 210 of the outer shell 2, the stopper 216 first penetrates into the space 333 of the top wall 33. When the top wall 33 moves to a position where the rear end of the front frame portion 334 contacts and is blocked by the front end of the blocking member 216, the blocking member 216 blocks the front frame portion 334 so that the inner shell 3 cannot move further, and the inner shell 3 cannot be assembled in the front chamber 210. The stop member 216 and the top wall 33 are matched to provide a fool-proof member, so as to prevent the user from mistakenly reversely installing the inner shell 3 in the outer shell 2.

It should be noted that, although the structure of the top wall 33 of the first embodiment is described by taking an example in which the space 333 is formed for a part of the stopper 216 to penetrate, and the front frame portion 334 is stopped by the stopper 216, the invention is not limited thereto. The top wall 33 of the first embodiment may also be a solid structure without the space 333, and the stopping member 216 stops at the rear end of the top wall 33 of the solid structure, so as to achieve the effect of stopping the top wall 33. In addition, the stopping member 216 of the first embodiment can also be a protrusion adjacent to the front end of the bottom wall 213, and the stopping member 216 in the form of a protrusion can also achieve the effect of stopping the front frame portion 334 and guiding the inner shell 3 to slide through the elongated sliding slot 321.

Referring to fig. 1, 2 and 3, each of the sleeves 4 is disposed in the corresponding passage 211 and extends into the corresponding through hole 312 for accommodating the ferrules 13 of the optical fiber connectors 100 that are butted to each other. Thereby, the ferrules 13 can be aligned with each other to ensure that the optical fibers F within the ferrules 13 can be surely contacted.

Referring to fig. 1, 2, 3 and 4, the front cover 5 is fixedly connected to the housing 2 and has a frame 51, a bottom plate 52 and a top plate 53. The frame 51 abuts against the front end of the front housing 21 and has a bottom 511 and a top 512. The frame 51 defines two openings 513 located between the bottom 511 and the top 512 and spaced apart along the left-right direction Y, and the openings 513 are communicated with the front chamber 210 and aligned with the through holes 312 respectively. Each opening 513 is configured for the corresponding optical fiber connector 100 to be inserted into the inner housing 3. Each of the openings 513 has a lower opening 514 adjacent the bottom 511 and an upper opening 515 adjacent the top 512. The lower opening 514 is used for the housing 11 of the corresponding optical fiber connector 100 to pass through, and the upper opening 515 is used for the locking element 12 of the corresponding optical fiber connector 100 to pass through. The bottom 511 is formed with a pivot slot 516. The frame 51 of the front cover 5 and the front case 21 of the housing 2 together define a pivot space 54 communicating with the front chamber 210. The base plate 52 extends rearward from the bottom 511 and is latched to the bottom wall 213 of the housing 2. The top plate 53 extends rearward from the top 512 and is latched to the top wall 214 of the housing 2.

Referring to fig. 2, 4 and 7, the shutter 6 can be pivotally disposed in the pivot space 54 to close or open the openings 513. The cover 6 has a plate 61 and a rotating shaft 62. The plate 61 is disposed in the frame 51 and behind the openings 513 to close or open the openings 513. The plate 61 can be pushed by the housing member 11 (shown in fig. 1) of the corresponding optical fiber connector 100 to pivot, so as to open the openings 513. The plate body 61 is recessed to form two recessed grooves 611 spaced apart and corresponding to the openings 513, and each recessed groove 611 is used to avoid the corresponding ferrule 13 (as shown in fig. 1) of the optical fiber connector 100, so as to prevent the ferrule 13 from colliding with the plate body 61 when the housing member 11 contacts the plate body 61, and to prevent the optical fiber F (as shown in fig. 1) inserted into the ferrule 13 from being damaged. The shaft 62 is formed at the front end of the plate 61 and has two shaft portions 621 spaced apart from each other along the left-right direction Y, and the shaft portions 621 are pivotally connected to the pivot slots 516. Thereby, the plate 61 can pivot in the pivot space 54 through the shaft 62 to close or open the openings 513. The plate body 61 has a free end portion 612 opposite to the rotating shaft 62, and during the pivoting process of the plate body 61, the free end portion 612 can move in the escape space 35 to avoid collision with the inner shell 3.

The torsion spring 7 is disposed in the pivot slot 516 and between the shaft portions 621, and two ends of the torsion spring 7 respectively abut against the back surface of the plate 61 of the shielding plate 6 and the bottom 511 of the front cover 5, so as to apply an elastic force to the shielding plate 6 to position the shielding plate at a closing position (as shown in fig. 2) closing the openings 513. Thereby, the plate body 61 of the shield 6 can play the role of dust prevention and light shielding.

Referring to fig. 1, 2 and 4, the conductive gasket 8 is made of an elastic conductive material, and is sleeved on the housing 2 and abutted between the rear end of the flange 217 and the panel to perform an electromagnetic shielding function between the flange 217 and the panel.

It should be noted that, although the number of the passages 211, the number of the through holes 312, the number of the sleeves 4, and the number of the openings 513 of the first embodiment are illustrated as two, they can be set as one according to actual requirements, and are not limited to the above numbers.

Referring to fig. 8, 9 and 10, the overall structure of the second embodiment of the fiber adapter 200 of the present invention is substantially the same as that of the first embodiment, except for the number of components.

In the second embodiment, the front housing 21 of the housing 2 defines two front chambers 210 spaced apart and side by side in the left-right direction Y and four passages 211 spaced apart and side by side in the left-right direction Y (as shown in fig. 5), and each front chamber 210 communicates with two of the passages 211. The rear case 22 of the housing 2 defines four rear chambers 221 spaced apart in the left-right direction Y and side by side and communicating with the passages 211, respectively. The frame 51 of the front cover 5 defines four openings 513 spaced apart and aligned in the left-right direction Y. The frame 51 of the front cover 5 and the front case 21 of the housing 2 together define two pivoting spaces 54 respectively communicating with the front chambers 210.

The fiber optic adapter 200 includes two inner housings 3, four ferrules 4, two shields 6, and two torsion springs 7. The inner housings 3 are respectively disposed in the front chambers 210, each through hole 312 of each inner housing 3 is aligned with and communicated with the corresponding passage 211, and each through hole 312 is aligned with the corresponding opening 513. Each of the sleeves 4 is disposed in the corresponding passage 211 and extends into the corresponding through hole 312. Each of the shutters 6 is pivotally disposed in the corresponding pivot space 54 to close or open the corresponding two of the openings 513. Each of the torsion springs 7 is used to apply an elastic force to the corresponding shutter 6 to position it in the closed position. Therefore, the optical fiber adapter 200 of the second embodiment can provide four pairs of optical fiber connectors 100 (as shown in fig. 1) for plugging, and the number of the optical fiber connectors 100 for plugging can be increased.

In summary, the fiber optic adapter 200 of the embodiments is connected between the bottom wall 32 and the top wall 33 through the side walls 34, so as to enhance the overall structural strength of the inner housing 3 and make it stronger. By the surface contact between the outer wall surfaces of the side walls 34 and the corresponding inner wall surfaces of the side walls 215, the outer wall surfaces of the side walls 34 can be firmly attached to the inner wall surfaces of the side walls 215, so that the inner casing 3 can be firmly assembled and positioned in the front chamber 210 without shaking or deflection. The escape space 35 defined by the front edges 341 of the side walls 34 and the bottom wall 3 prevents the shutter 6 from colliding with the inner shell 3 during pivoting. The stop member 216 and the top wall 33 are matched to provide a fool-proof member, so as to prevent the user from mistakenly reversely installing the inner shell 3 in the outer shell 2. The shell 2 and the conductive gasket 8 can play a role of electromagnetic shielding, and can achieve the effect of preventing electromagnetic leakage, thereby really achieving the purpose of the utility model.

However, the above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and all simple equivalent changes and modifications made according to the claims and the contents of the patent specification should be included in the scope of the present invention.

Claims (17)

1. A fiber optic adapter, comprising:

a housing defining at least a front chamber and at least a channel communicating with the front chamber;

at least one inner shell, which is arranged in the front cavity and is provided with a rear wall, a bottom wall extending forwards from the bottom of the rear wall, a top wall extending forwards from the top of the rear wall, and two side walls respectively extending forwards from the opposite side of the rear wall and connecting the bottom wall and the top wall, wherein the rear wall defines at least one through hole aligned with the channel, and an avoiding space is formed between the bottom wall and the two side walls;

a front cover fixedly connected to the housing and defining at least one opening communicated with the front chamber and aligned with the through hole, the front cover and the housing defining at least one pivoting space together; and

at least one shielding plate can be pivotally arranged in the pivoting space to close or open the opening, and the shielding plate is provided with a free end part which can move in the avoiding space.

2. The fiber optic adapter of claim 1, wherein said outer housing has a stop at the bottom of said front chamber for stopping said top wall to prevent said inner housing from being inverted within said front chamber.

3. The fiber optic adapter of claim 2, wherein the stop is an elongated rail, and the bottom wall defines an elongated slot in sliding engagement with the stop.

4. The fiber optic adapter of claim 1, wherein the outer housing has an elongated rail, and the inner housing defines an elongated slot slidably coupled to the elongated rail.

5. The fiber optic adapter of claim 1, wherein said housing further defines a rear chamber in communication with said passage, said housing having a dividing wall between said front chamber and said rear chamber, said dividing wall defining said passage.

6. The fiber optic adapter of claims 1 or 5, further comprising a ferrule disposed at least within the passage.

7. The fiber optic adapter of claim 6, wherein said sleeve extends into said bore.

8. The fiber optic adapter of claim 1 wherein said front cover has a bottom portion and a top portion, said opening configured for receiving a fiber optic connector therethrough for insertion within said inner housing, said opening having a lower opening adjacent said bottom portion for receiving a housing member of said fiber optic connector therethrough and an upper opening adjacent said top portion for receiving a locking member of said fiber optic connector therethrough.

9. The fiber optic adapter of claim 8, wherein the bottom portion defines a pivot slot, the shutter has a plate for closing or opening the opening and being movable within the escape space, and a pivot shaft defined at a front end of the plate and pivotally connected to the pivot slot, the plate having the free end opposite to the pivot shaft.

10. The fiber optic adapter of claim 8, wherein the shroud recess forms a recess groove for avoiding a ferrule of the fiber optic connector.

11. The fiber optic adapter of claim 1 wherein the front cover has a bottom portion and a top portion, the bottom portion defining a pivot slot, the shutter having a plate for closing or opening the opening and movable within the clearance space, and a pivot shaft defined at a front end of the plate and pivotally connected to the pivot slot, the plate having the free end opposite the pivot shaft.

12. The fiber optic adapter of claims 1, 9 or 11, wherein each of said side walls has an arcuate rearwardly concave front edge extending upwardly and downwardly and curving rearwardly, said relief space being defined between said front edges of said side walls and said bottom wall.

13. The fiber optic adapter of claim 1, further comprising a torsion spring having two ends abutting against the shutter and the front cover, respectively, for applying a spring force to the shutter to close the opening.

14. The fiber optic adapter of claim 1, wherein the outer housing defines two passages communicating with the front chamber, the rear wall of the inner housing defines two through holes respectively aligned with the two passages, the front cover defines two openings respectively aligned with the two through holes, and the shutter is used to close or open the two openings.

15. The fiber optic adapter of claim 1, wherein said housing is a conductive housing.

16. The fiber optic adapter of claim 1, further comprising a conductive gasket disposed about the housing.

17. The fiber optic adapter according to claim 1, wherein the outer housing defines two side-by-side front chambers and four side-by-side passages, each front chamber communicating with a corresponding two of the passages, the front cover defining four side-by-side openings, the front cover and the outer housing defining two pivoting spaces together, the fiber optic adapter comprising two inner housings and two shutters, the two inner housings being disposed in the two front chambers, respectively, the rear wall of each inner housing defining two through holes, each through hole being aligned with a corresponding one of the passages and a corresponding one of the openings, each shutter being pivotably disposed in a corresponding one of the pivoting spaces for closing or opening a corresponding two of the openings.

Images