TWI396879B - Dust cap for optical fiber adapter - Google Patents

Description

Dust cover for fiber optic adapter

The present invention relates to a dust cover, and more particularly to a dust cover for a fiber optic adapter.

In recent years, optical fiber has been widely used as a transmission medium for signals because of its advantages of high frequency bandwidth and low loss. In order for the signal to be transmitted to a greater distance, a high power laser diode is born, thus greatly increasing the energy coupled to the fiber. However, when the above-mentioned high-intensity infrared beam is emitted from one end of the optical fiber, the human eye cannot judge the presence or absence of the light beam. If the operator's eyes are inadvertently exposed directly to the light beam, permanent visual damage is often caused.

In order to solve the above problems, referring to Fig. 1, a fiber optic adapter 100 having a light blocking member is disclosed in U.S. Patent Publication No. 20090226141. The fiber optic adapter 100 includes a receptacle 110 for insertion and coupling of fiber optic connectors. The accommodating portion 110 includes a chamber 140. A light blocking member 190 is disposed on the protrusions 152 and 162 adjacent to the opening of the chamber 140, and the light shielding sheet 195 extends into the chamber 140 for blocking the light beam emitted therefrom. The propagation path prevents the beam from hurting the eye.

Although the light blocking member 190 can be used to block the light beam, it does not prevent dust from entering the chamber 140. Therefore, when the optical fiber connector is pulled out from the chamber 140, it is necessary to put a dust cover to prevent dust from entering. However, when the dust cover of the general surface is inserted into the adapter 100 having the light shielding member 190, it is pressed to the light shielding sheet 195, and the elasticity of the light shielding member 190 is liable to be caused by the long time.

In view of this, there is a need to propose a dust cover for a fiber optic adapter to solve the above problems.

The invention provides a dust cover for a fiber optic adapter, which can extend the service life of the light shielding member on the fiber adapter.

In one embodiment, the dust cover of the present invention includes a flange and at least one extension wall. The flange includes a cover surface and a first side and a second side connected to the cover. The extension wall extends upward from the cover surface, wherein the end of the extension wall adjacent to the first side has a distance from the top end along the direction of the parallel cover surface to the first side, which is greater than the direction of the bottom end along the parallel cover surface to the The distance from one side.

The above and other objects, features, and advantages of the present invention will become more apparent from the accompanying drawings.

Referring to Fig. 2, a conventional LC type fiber optic connector 200 has a substantially rectangular outer shape with a square cross section. The outer surface of the connector 200 is provided with a resilient latch 220. The latch 220 is integral with the outer casing of the connector 200 and has a movable hinge 225 at the bottom for allowing tab 226 vertical connectors. The central axis 250-250 moves up and down. In addition, a ferrule 240 extends from the opening 211 of a two-piece composition comprising a housing 210 and a cover 230, both of which are connected by ultrasonic welding. Together. The interior of the two-piece composition also includes a spring (not shown) that allows the sleeve 240 to move back and forth through the opening 211. The latch 220 includes a pair of protrusions 221 located on opposite sides of the lug 226.

Referring to FIG. 3, a pair of opposite ends of a conventional LC-type fiber optic adapter 300 have structurally similar receiving portions 310, 320 for insertion and coupling of the optical fiber connectors. The accommodating portion 310 includes a first chamber 330, a second chamber 340, a plurality of side walls 350, and a partition wall 360. The second chamber 340 is adjacent to the first chamber 330 , and the partition wall 360 is disposed between the first chamber 330 and the second chamber 340 . In addition, as shown in the figure, the first chamber 330 and the second chamber 340 are each surrounded by three side walls 350 and a partition wall 360. In addition, opposite partitions 362 and 352 are disposed on the partition wall 360 in the chamber 330 and its opposite side wall 350. In addition, axial recesses 370, 380 are formed in the side wall 350 to be connected to the chambers 330, 340, respectively.

When the fiber optic connector 200 is inserted into the chamber 330 of the fiber optic adapter 300, it is located on opposite sides of the lug 226 of the latch 220. The protrusion 221 will be deflected downward and the latch 220 will be pushed into the recess 370.

Referring to FIG. 4, a conventional light shielding member 400 that can be used in the optical fiber adapter 300 includes a first parallel portion 410, a second parallel portion 420, and a connecting portion 430 connecting the first parallel portion 410 and the second parallel portion 420. The first parallel portion 410 is parallel to the second parallel portion 420, and the first parallel portion 410, the second parallel portion 420 and the connecting portion 430 together form a sandwich opening 440. In addition, the light blocking member 400 further includes a light shielding sheet 450 extending from one end of the first parallel portion 410.

Referring to FIG. 5, when the light blocking member 400 is mounted on the optical fiber adapter 300, the sandwiching opening 440 of the light blocking member 400 is sandwiched between the protrusions 352 and 362, and the light shielding sheet 450 extends into the chamber 330. It is used to block the propagation path of the light beam emitted from the chamber 330, thereby preventing the beam from damaging the eyes. In addition, when a fiber optic connector is to be docked with the adapter 300 having the light shielding member 400, the light shielding member 400 is not required to be removed first, and the connector is directly pushed into the chamber 330. It will squeeze into the gap between the connector and the side wall 350. When the connector is pulled out of the adapter 300, the light shielding sheet 450 returns to its original shape due to its elasticity, and has a function of blocking the beam propagation path.

Referring to Figures 6, 7, and 8, the dust cover 600 for the fiber optic adapter 300 of the present invention has a rectangular flange 610 including a cover surface 618 and four sides 611, 612 connected to the cover surface 618. 613, 614, wherein the side surface 611 is opposite to the side surface 613 and is connected to the side surfaces 612, 614. Extending upwardly from the cover surface 618 is a pair of opposing extension walls 622, 624 that are parallel to the sides 612, 614. At least one strip-like protrusions 632, 634 are formed on the extension walls 622, 624, respectively, perpendicular to the cover surface 618. One end of the extension wall 622 near the side 611 gradually moves away from a bottom to the top of a virtual plane 690 that extends from the side 611 and is perpendicular to the cover surface 618. In short, the end of the extending wall 622 near the side surface 611 is gradually inclined from the bottom to the top away from the virtual plane 690, so that the top end thereof is parallel to the side surface 611 in a direction parallel to the cover surface 618, which is greater than the bottom edge. The distance from the direction of the parallel cover 618 to the side 611 is shown. Similarly, the extension wall 624 is near one end of the side 611 and also gradually moves away from the virtual plane 690 from bottom to top.

In addition, the dust cover 600 further includes an extension portion 640 extending upward from the cover surface 618 and gradually approaching the side surface 613. Therefore, a recess 642 is defined between the extension portion 640 and the flange 610. Further, a pair of hooks 650 extending upward are formed from the extending portion 640.

When the dust cover 600 of the present invention is placed over the adapter 300 having the light blocking member 400, the flange 610 is placed over the opening of the chamber 330, at which time the extension walls 622, 624 will be pushed into the chamber 330, and The hook 650 is also inserted into the pocket 370. Since the partition wall 360 of the adapter 300 and the upper half of the two side walls 350 of the parallel partition wall 360 are retracted rearward, notches 382 and 384 are formed (see Fig. 3). Thus, when the dust cover 600 is attached to the adapter 300, the extension portion 640 can be received in the notches 382, 384, and the opening of the chamber 330 can be covered by the flange 610 of the dust cover 600 to achieve a dustproof effect.

In addition, when the dust cover 600 is placed on the adapter 300, the protrusions 632, 634 on the extension walls 622, 624 will contact the inner wall of the chamber 330, and the hook 650 will also contact the inner wall of the recess 370. This provides a force to prevent the dust cover 600 from being pulled out to prevent the dust cover 600 from accidentally falling out. In this way, the dust cover 600 can be fixed without using the cylinder in the chamber 330, thereby avoiding damage to the dust cover 600 and the adapter 300. In addition, since the concave portion 642 is formed between the extending portion 640 and the flange 610, it is convenient for the user to apply force to allow the dustproof cover 600 to be easily pulled out. In this way, there is no need to separately provide other protrusions on the flange 610 which can facilitate the user to apply force to pull out the dust cover 600, thereby reducing the volume of the dust cover 600.

In addition, more importantly, since one end of the extension walls 622, 624 near the side surface 611 gradually faces away from the side surface 611 from the bottom to the top, when the dust cover 600 is placed over the adapter 300, the extension walls 622, 624 will only The portion of the light shielding sheet 450 is pressed, or even not pressed at all, so that the elasticity of the light shielding sheet 450 will not be lowered by covering the dust cover 600 for a long time.

The present invention has been disclosed in the foregoing embodiments, and is not intended to limit the present invention. Any of the ordinary skill in the art to which the invention pertains can be modified and modified without departing from the spirit and scope of the invention. . Therefore, the scope of the invention is defined by the scope of the appended claims.

100. . . Fiber optic adapter

110. . . Housing

140. . . Room

152. . . Protrusion

162. . . Protrusion

195. . . Shading

200. . . The optical fiber connector

210. . . case

211. . . Opening

220. . . Latch

221. . . Protrusion

225. . . hub

226. . . Lug

230. . . Cover

240. . . casing

250. . . Axis

300. . . Fiber optic adapter

310. . . Housing

320. . . Housing

330. . . Room

340. . . Room

350. . . Side wall

352. . . Protrusion

360. . . Partition wall

362. . . Protrusion

370. . . Pocket

380. . . Pocket

382. . . gap

384. . . gap

400. . . Shading

410. . . First parallel

420. . . Second parallel

430. . . Connection

440. . . Sandwich opening

450. . . Sunshade

600. . . Dust cover

610. . . Flange

611. . . side

612. . . side

613. . . side

614. . . side

618. . . Cover

622. . . Extension wall

624. . . Extension wall

632. . . Protrusion

634. . . Protrusion

640. . . Extension

642. . . Concave

650. . . Hook

690. . . Virtual plane

Figure 1: A fiber optic adapter with a light shield.

Figure 2: is a perspective view of a conventional LC type fiber optic connector.

Figure 3: A perspective view of a conventional LC-type fiber optic adapter.

Figure 4: is a perspective view of a conventional shade.

Fig. 5 is a combination diagram of the optical fiber adapter of Fig. 3 and the light shielding member of Fig. 4.

Figures 6 and 7 are perspective views of the dust cover of the present invention at different viewing angles.

Figure 8 is a side view of the dust cover of the present invention.

600. . . Dust cover

610. . . Flange

612. . . side

613. . . side

618. . . Cover

622. . . Extension wall

632. . . Protrusion

640. . . Extension

642. . . Concave

650. . . Hook

Claims (11)

A dust cover for a fiber optic adapter, the fiber adapter having a plurality of walls surrounding a cavity for interfacing with a fiber optic connector, the dust cover comprising: a flange including a cover surface and a first side and a second side connected to the cover, the first side being opposite to the second side; at least one extending wall extending upwardly from the cover, wherein the extending wall is adjacent to the first side The distance from the top end to the first side along the direction parallel to the cover surface is greater than the distance of the bottom end from the direction parallel to the cover surface to the first side. The dust cover of claim 1, wherein the end of the extension wall adjacent to the first side is gradually inclined from bottom to top. The dust cover of claim 1, wherein the dust cover comprises two opposite extension walls. The dust cover of claim 1, further comprising: a protrusion disposed on the extension wall for contacting the inner wall of the chamber. The dust cover of claim 4, wherein the protrusion is strip-shaped and perpendicular to the cover surface. The dust cover of claim 1, further comprising: an extension portion extending upwardly from the cover and gradually approaching the second side, wherein a recess is defined between the extension and the flange. The dust cover of claim 6, wherein the fiber adapter is an LC type fiber adapter. The dust cover of claim 6, further comprising: a pair of hooks extending upward from the extension. The dust cover of claim 8, wherein the fiber adapter is an LC type fiber adapter. The dust cover of claim 1, further comprising: a pair of hooks extending upward from the cover. The dust cover of claim 10, wherein the fiber adapter is an LC type fiber adapter.