CN207586480U - fiber optic adapter - Google Patents

Abstract

The utility model discloses an optical fiber adapter contains shell body and interior casing. The outer housing has a chamber surrounded by four walls. A first base plate, a first alignment cylinder extending from the first base plate, and two stops formed on two of the walls, respectively, are formed within the chamber. The inner housing includes a second bottom plate, a second alignment cylinder and two hooks. A second alignment cylinder extends from the second base plate in the longitudinal direction. The two hooks are formed on the second base plate, and each hook comprises a bending part, an extending part and a buckling part. The curved portion has an arcuate cross-section and extends from the second base plate. The extension portion extends from the bent end in parallel to the longitudinal direction. The buckling parts are wedge-shaped and formed on the outer side surface of the tail end of the extending part, wherein the buckling parts of the two clamping hooks are respectively abutted against the two stop blocks, so that the inner shell is prevented from being pulled out of the outer shell.

Description

fiber optic adapter

technical field

The utility model relates to an optical fiber adapter, in particular to a one-piece optical fiber adapter.

Background technique

In recent years, the use of optical fiber for communication purposes has become very large, and data, voice and other communication networks are increasingly using optical fiber to transmit information. Optical fibers are typically configured as glass fibers used to carry light. Individual fibers can be grouped to be able to carry large amounts of data simultaneously.

When building a fiber optic network, each fiber is typically connected to a source device and a destination device. Additionally, along the fiber optic path between the source and destination, various connections or couplings can be made on the fiber to adjust the fiber length. Each connection or coupling requires connectors and adapters to align the fibers so that light can travel without interruption. A typical connector includes two symmetrical housings, each with a connector latch. An alignment sleeve is placed within the connector latch to ensure precise alignment of the fibers. The two housings are then welded (ie, by ultrasonic welding), riveted, or otherwise attached to each other to form the connection. A single fiber is then placed within each connector latch, aligning the sleeves and thus the fibers.

Such an exemplary connector is expensive to produce due to the multiple components required (each of which may need to be fabricated separately) and the necessity of welding, riveting, or other joining processes to join the two symmetrical housings. Furthermore, alignment issues may be caused by the joining process since the two symmetrical housing parts may be displaced during the welding process.

US Patent No. 5,317,663 issued May 31, 1994 to Beard et al. discloses a method of reducing the number of parts required. In the aforementioned patent, a fiber optic adapter is disclosed that includes a one-piece housing that houses the two connector latches and an alignment sleeve. However, in order to place the components within the housing, a window is provided in the housing and a cover is welded to the housing to cover the window. While the design of the aforementioned US patent eliminates any alignment problems caused by joining the two housing parts, it still requires many parts and multiple assembly steps, including welding the housing cover to the window.

In addition, as shown in FIG. 1 , an existing LC duplex fiber optic adapter includes an outer housing 100 , an alignment sleeve 300 and an inner housing 200 .

Referring to FIG. 2 , the outer housing 100 has two left and right chambers 190 with the same structure. The chamber 190 is surrounded by four walls, and the bottom plate 110 and the alignment cylinder 130 are disposed inside it. Base plate 110 is substantially rectangular, and its two sides are connected to the left wall and the right wall of chamber 190 respectively, and other two sides are then close to the upper wall and the lower wall of chamber 190 respectively, but are not connected with chamber 190 upper wall and the lower wall. Lower wall connection. An alignment cylinder 130 extends from the bottom plate 110 . Two wedge-shaped stoppers 140 are also formed inside the outer shell 100 , which are respectively arranged on the upper wall and the lower wall of the chamber 190 . Each wedge block 140 has a front surface 141 and a locking surface 142 .

Referring to FIG. 3 , the inner housing 200 includes a bottom plate 210 , and an alignment cylinder 230 extends from the front of the bottom plate 210 . The front and rear ends of the alignment cylinder 230 have openings respectively, wherein the rear opening is opened on the bottom plate 210 . Two hooks 240 are extended from both sides of the back of the bottom plate 210, and the two hooks 240 are arranged opposite to each other, and each hook 240 includes a first extension portion 241, a second extension portion 242 and a buckle portion 243, wherein the first extension portion 240 The extension portion 241 and the second extension portion 242 substantially form a V-shaped cross section.

When the fiber optic adapter is assembled, half of the alignment sleeve 300 is inserted into the alignment cylinder 130 from the rear end of the alignment cylinder 130 . Afterwards, the inner housing 200 is inserted into the chamber 190 of the outer housing 100 , and the other half of the alignment sleeve 300 is inserted into the alignment cylinder 230 from the rear end of the alignment cylinder 230 . Fig. 4 shows the fiber optic adapter after the aforementioned assembly is completed.

When the aforementioned inner housing 200 is assembled and positioned, its buckling portion 243 will abut against the buckling surface 142 of the stopper 140 , thereby preventing the inner housing 200 from being pulled out of the outer housing 100 . In addition, the first extension part 241 and the second extension part 242 are compressed and inserted into the gap between the bottom plate 110 and the upper and lower walls of the chamber 190 .

After the aforementioned inner housing 200 is assembled and positioned, since the first extension portion 241 and the second extension portion 242 are severely compressed, a huge stress is generated at the connection between them, and the function of the hook 240 is likely to fail after a long time.

Utility model content

The purpose of the utility model is to provide an optical fiber adapter.

In one embodiment, the optical fiber adapter of the present invention includes an outer shell and an inner shell. The outer housing has a chamber surrounded by four walls. A first bottom plate, a first alignment cylinder and two stoppers are formed in the cavity, wherein the first alignment cylinder extends from the first bottom plate to accommodate the first optical fiber, and the two stoppers are respectively formed on two of the walls . The inner casing includes a second bottom plate, a second aligning cylinder and two hooks. The second aligning cylinder extends from the second bottom plate in the longitudinal direction for accommodating the second optical fiber. Two hooks are formed on the second bottom plate, and each hook includes a bending portion, an extension portion and a locking portion. The bent portion has an arc-shaped cross section and extends from the second bottom plate. The extension part extends from the end of the bent part in parallel to the longitudinal direction. The buckle part has a wedge shape and is formed on the outer surface of the end of the extension part, wherein the buckle parts of the two hooks abut against the two stoppers respectively, thereby preventing the inner casing from being pulled out of the outer casing.

In one embodiment, the two bent portions respectively extend from two sides of the second bottom plate.

In one of the embodiments, four support arms are further included, extending from the second bottom plate, wherein the four support arms can be inserted into the gap between the first bottom plate and the chamber wall, thereby preventing the inner casing Shaking inside.

In one embodiment, each of the hooks is located between two of the four support arms.

In one of the embodiments, the optical fiber adapter is an LC type optical fiber adapter.

After the inner shell of the utility model is assembled and positioned, its hooks are no longer compressed, so they bear less stress, and the reliability is greatly improved.

In order to make the above and other purposes, features, and advantages of the present invention more obvious, the following specifically cites the embodiments of the present invention, together with the accompanying drawings, for a detailed description as follows.

Description of drawings

Fig. 1 is a three-dimensional exploded view of an existing optical fiber adapter;

Fig. 2 is the internal structure of the outer casing of the optical fiber adapter in Fig. 1;

Fig. 3 is a perspective view of the inner housing of the optical fiber adapter in Fig. 1;

Fig. 4 is a cross-sectional view of the assembled optical fiber adapter in Fig. 1;

Fig. 5 is a three-dimensional exploded view of the optical fiber adapter of the present invention;

6 and 7 are the internal structure of the outer shell of the optical fiber adapter of the present invention;

Fig. 8 is a cross-sectional view of the outer shell of the optical fiber adapter of the present invention;

9 and 10 are perspective views of the inner housing of the optical fiber adapter of the present invention under different viewing angles;

Fig. 11 is a cross-sectional view of the inner housing of the optical fiber adapter of the present invention;

Fig. 12 is a cross-sectional view of the optical fiber adapter of the present invention.

in,

100 shells

110 bottom plate

130 alignment cylinder

140 stop

141 Front

142 snap face

190 chambers

200 inner shell

210 bottom plate

230 alignment cylinder

240 hooks

241 First Extension

242 Second extension

243 buckle part

300 alignment sleeve

500 shell

510 bottom plate

530 alignment cylinder

540 stop

541 Front

542 snap face

543 Top

590 chambers

600 inner shell

610 Bottom plate

611 Front

612 back

620 Support Arm

630 Alignment Cylinder

631 opening

632 openings

640 hook

641 bend

642 extension

643 buckle part

647 snap face

Detailed ways

Referring to FIG. 5 , the optical fiber adapter of the present invention, such as an LC duplex optical fiber adapter, includes an outer housing 500 , an alignment sleeve 300 and an inner housing 600 .

Referring to FIGS. 6 to 8 , the outer casing 500 is formed by injection molding through plastic molding, and generally has a hollow cuboid shape, and its interior is divided into two left and right chambers 590 with the same structure. The chamber 590 is surrounded by four walls, namely a left wall, a right wall, an upper wall and a lower wall, and a bottom plate 510 and an alignment cylinder 530 are disposed inside each chamber 590 . The bottom plate 510 is substantially rectangular, and its two sides are respectively connected to the left wall and the right wall of the chamber 590, while the other two sides are respectively close to the upper wall and the lower wall of the chamber 590, but not connected to the upper wall and the lower wall of the chamber 590. Lower wall connection. The alignment cylinder 530 extends longitudinally from the base plate 510 , and an opening at one end thereof is opened on the base plate 510 . The alignment cylinder 530 and bottom plate 510 can be formed together with the outer housing 500 in a single injection molding process. Two wedge-shaped stoppers 540 are also formed inside the outer casing 500 , which are respectively arranged on the upper wall and the lower wall of the chamber 590 . Each wedge block 540 has a front surface 541 , a snap surface 542 and a top surface 543 . The two fronts 541 are inclined planes and both face the same opening of the chamber 590 , and the angle between the two fronts 541 and the upper wall or the lower wall of the chamber 590 is greater than 90 degrees. The two buckling surfaces 542 are inclined planes, both of which face the other opening of the chamber 590 , and the included angle between the two buckling surfaces 542 and the upper wall or the lower wall of the chamber 590 is less than 90 degrees. The top surface 543 is flat, connects the front surface 541 and the locking surface 542 , and is parallel to the upper wall or the lower wall of the chamber 590 .

Referring to FIGS. 9 to 11 , the inner housing 600 is formed by injection molding through plastic molding, and includes a substantially rectangular bottom plate 610 having a front 611 and a back 612 . An alignment cylinder 630 extends longitudinally from the front 611 of the bottom plate 610 . The front and rear ends of the alignment cylinder 630 respectively have openings 631 , 632 . The rear opening 632 is defined on the bottom plate 610 . Two support arms 620 are respectively disposed on two sides of the bottom plate 610 , and the four support arms 620 extend longitudinally from the side of the bottom plate 610 , and are opposite to the direction in which the alignment cylinder 630 extends from the bottom plate 610 . In addition, hooks 640 are respectively disposed on both sides of the bottom plate 610 , and each of the hooks 640 is respectively located between the two support arms 620 . The two hooks 640 are disposed opposite to each other, and each hook 640 includes a curved portion 641 , an extension portion 642 and a locking portion 643 . The curved portion 641 generally has an arc-shaped cross-section and bends and extends from the side of the bottom plate 610 , while the extension portion 642 extends longitudinally from the end of the curved portion 641 . The locking portion 643 has a substantially wedge shape and is formed on the outer surface of the end of the extension portion 642 . Each buckling portion 643 has a flat buckling surface 647 , and an included angle between the buckling surface 647 and the outer surface of the extension portion 642 is less than 90 degrees.

When the optical fiber adapter of the present invention is assembled, half of the alignment sleeve 300 is inserted into the alignment cylinder 530 from the rear end of the alignment cylinder 530 . Afterwards, the inner housing 600 is inserted into the chamber 590 of the outer housing 500 , and the other half of the alignment sleeve 300 is inserted into the alignment cylinder 630 from the rear end of the alignment cylinder 630 . Fig. 12 shows the optical fiber adapter of the utility model after assembly.

According to the optical fiber adapter of the present invention, when the inner housing 600 is inserted into the cavity 590 , the hook 640 will be compressed by the stopper 140 , and the buckle portion 643 will slide on the top surface 543 of the stopper 540 . Please refer to FIG. 12 , when the inner housing 600 is assembled to the position, the buckling surface 647 of the buckling portion 643 can abut against the buckling surface 542 of the stopper 540 , thus preventing the inner housing 600 from being pulled out of the outer housing 500 outside. Besides, the supporting arms 620 are respectively inserted into the gaps between the bottom plate 510 and the upper and lower walls of the chamber 590 .

According to the optical fiber adapter of the present utility model, the sleeve tube of the optical fiber connector together with the optical fiber therein can be inserted into the alignment cylinder 530, and inserted into one end of the alignment sleeve tube 300; the sleeve tube of the other optical fiber connector together with the optical fiber inside it is It can be inserted into the alignment cylinder 630, and inserted into the other end of the alignment sleeve 300, and can be in contact with the opposite sleeve, so that the optical fibers in the two sleeves can be butted.

After the inner casing 600 of the present invention is assembled and positioned, its hook 640 is no longer compressed, so it bears less stress, and the reliability is greatly improved. In addition, the support arm 620 inserted between the bottom plate 510 and the upper or lower wall of the cavity 590 can prevent the inner casing 600 from shaking inside the outer casing 500 .

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (5)

1. An optical fiber adapter, characterized in that, comprising: The outer casing has a chamber, which is formed by four walls, wherein a first bottom plate, a first alignment cylinder and two stoppers are formed in the chamber, and the first alignment cylinder is separated from the The first bottom plate is extended to accommodate the first optical fiber, and the two stoppers are respectively formed on two of the four walls; and Inner casing, the inner casing is integrally formed and arranged in the chamber, the inner casing includes: second floor; a second alignment cylinder for accommodating a second optical fiber, the second alignment cylinder extending longitudinally from the second bottom plate; and Two hooks are formed on the second bottom plate, each of the hooks includes a curved portion, an extension portion and a buckle portion, wherein the curved portion has an arc-shaped section and extends from the second bottom plate, The extension part extends from the end of the bending part parallel to the longitudinal direction, the buckle part has a wedge shape and is formed on the outer surface of the end of the extension part, wherein the two hooks The buckles respectively abut against the two stoppers, thereby preventing the inner casing from being pulled out of the outer casing. 2 . The optical fiber adapter according to claim 1 , wherein the two bent portions respectively extend from two sides of the second bottom plate. 3 . 3. The fiber optic adapter according to claim 1, further comprising: four support arms extending from the second bottom plate, wherein the four support arms are insertable into the gaps between the first bottom plate and the walls of the chamber, thereby preventing the inner housing from The housing shakes inside. 4. The fiber optic adapter according to claim 3, wherein each of the hooks is located between two of the four support arms. 5. The fiber optic adapter according to claim 1, wherein the fiber optic adapter is an LC type fiber optic adapter.