TWI452368B - Optical fiber connector - Google Patents

Description

The optical fiber connector

The present invention relates to a fiber optic connector.

With the development of fiber-to-the-home technology, the assembled fiber optic connectors are widely used in the construction of the last line segment of the optical communication network due to the quick, simple and convenient assembly.

A fiber optic connector includes a ferrule, a connecting sleeve, a crimp sleeve, a large press sleeve and a small pressure sleeve. The ferrule is provided with a through hole for the fiber to be inserted, the connecting sleeve has a ferrule hole and a socket, the ferrule is inserted through the ferrule hole, the crimping sleeve is formed with a rib, and the rib of the crimping sleeve is engaged with the connecting sleeve The socket is fixed in the receiving space formed by the connecting sleeve and the crimping sleeve. The large sleeve is disposed at one end of the connecting sleeve away from the crimping sleeve, and the large pressing sleeve is stepped away from one end of the connecting sleeve, and the small pressing sleeve is crimped to the large pressing sleeve away from one end of the connecting sleeve to fix the optical fiber.

The connecting sleeve of the optical fiber connector is deformed to fix the ferrule with the ribs on the socket and the crimping sleeve, and the ferrule is easily loosened due to the weak locking force between the socket and the rib.

In view of this, it is necessary to provide a fiber optic connector with a better locking effect.

A fiber optic connector comprising a ferrule, a clamping member, an outer casing and an inner casing, and a ferrule a first through hole for the optical fiber to be pierced, the outer casing is provided with a first thread, the inner casing comprises a body and a plug portion extending from one end of the body, and the outer wall of the body is provided with a second thread screwed into the first thread, The shell is fixed to the outer casing by screwing the second thread, the clamping member is disposed between the outer casing and the inner casing, and one end of the clamping member is formed with a mounting hole, the ferrule is clamped in the inner casing and one end of the ferrule is disposed in the assembling hole The clamping member is provided with one end of the fitting hole abutting against one end of the inner casing and one end of the ferrule, and the other end of the clamping member abuts against the inner wall of the outer casing. The outer casing and the inner casing are screwed together, and the locking effect is better and the structure is simple.

The optical fiber connector is provided with a first thread on the outer casing, and a second thread corresponding to the first thread of the outer casing is disposed on the inner casing, so that the outer casing is screwed and fixed on the inner casing to jointly receive the clamped fixed optical cable. The clamping member, and thus the ferrule, has a better fixing effect and a simple structure.

100, 200‧‧‧ fiber optic connectors

11‧‧‧Shell

113‧‧‧ fixed department

115‧‧‧ Housing Department

117‧‧‧first thread

119‧‧‧ accommodating space

13, 23‧‧‧ inner shell

131‧‧‧Ontology

133‧‧‧Interface

135, 235‧‧‧ first through hole

137‧‧‧Second through hole

138, 238‧‧‧Resistance

139‧‧‧second thread

141‧‧ ‧ gap

143‧‧‧ card slot

147‧‧‧ third through hole

15‧‧‧Clamping parts

151‧‧‧Connecting Department

153‧‧‧Cars Department

155‧‧‧ gripping department

157, 257‧‧‧ assembly holes

159, 259‧‧‧ first screw hole

161‧‧‧Second screw hole

162, 262‧‧ ‧ step surface

163‧‧‧ slotting

165‧‧‧claw

17, 27‧‧ ‧ ferrule

171‧‧‧ Subject

173, 273‧‧ ‧ Limitation Department

175, 275‧‧ ‧ guidance

177‧‧‧ snap groove

178‧‧‧First perforation

179‧‧‧second perforation

19‧‧‧ card ring

191‧‧‧Resistance

193‧‧‧ clip arm

2731‧‧‧Shaving plane

249‧‧‧ bumps

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing an assembled state of a fiber optic connector according to a first embodiment of the present invention.

2 is an exploded perspective view of the optical fiber connector shown in FIG. 1.

Figure 3 is a cross-sectional view of the fiber optic connector of Figure 1 taken along line III-III.

Figure 4 is a perspective view showing the assembled state of the optical fiber connector of the second embodiment of the present invention.

Figure 5 is an exploded perspective view of the optical fiber connector shown in Figure 4.

Figure 6 is an exploded perspective view of the fiber optic connector of Figure 4 at another angle.

Figure 7 is a cross-sectional view of the fiber optic connector of Figure 4 taken along line VII-VII.

The optical fiber connecting device of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIGS. 1 to 3, the optical fiber connector 100 of the first embodiment of the present invention includes a housing 11, an inner casing 13, a clamping member 15, a ferrule 17, and a snap ring 19.

The outer casing 11 includes a fixing portion 113 and a receiving portion 115. The fixing portion 113 is substantially cylindrical and has a first thread 117 on its inner wall. The accommodating portion 115 is formed by contracting and extending from one end of the fixing portion 113, and has a substantially conical shape, and has an inner tapered surface therein, and a tapered receiving space 119 is formed.

The inner casing 13 includes a body 131 corresponding to the fixing portion 113 of the outer casing 11 and a plug portion 133 extending from one end of the body 131. The main body 131 defines a first through hole 135 and a second through hole 137 extending from one end of the body 131 away from the insertion portion 133 . The second through hole 137 communicates with the first through hole 135 and extends to the insertion portion 133. The second through hole 137 has a smaller aperture than the first through hole 135. An inner surface of the body 131 is formed with a resisting surface 138 at a boundary between the first through hole 135 and the second through hole 137. A second thread 139 is formed on the outer wall of the body 131. The body 131 is formed with a circular arc-shaped notch 141 away from one end of the insertion portion 133. The inner wall of the body 131 is formed with a card slot 143 extending in the circumferential direction of the body 131, and the card slot 143 faces the notch 141. The insertion portion 133 is substantially square, and has a third through hole 147 open from one end of the body 131. The third through hole 147 is in communication with the second through hole 137 and the aperture of the third through hole 147 is larger than the aperture of the second through hole 137. .

The clamping member 15 includes a connecting portion 151, a holding portion 153 extending from one end of the connecting portion 151, and a substantially conical clamping portion 155 extending from the other end of the connecting portion 151. The connecting portion 151 and the holding portion 153 are both columnar, and the diameter of the engaging portion 153 is smaller than the diameter of the connecting portion 151. The diameter of the engaging portion 153 is substantially equal to the diameter of the first through hole 135. The clamping member 15 defines a mounting hole 157 extending from the latching portion 153 away from one end of the connecting portion 151 to the clamping portion 155. The clamping portion 155 defines a first screw hole 159 communicating with the mounting hole 157 and extending from the first screw hole 159 away from the one end of the mounting hole 157 and extending through the clamping portion 155 is away from the second screw hole 161 at one end of the connecting portion 151. The aperture of the first screw hole 159 is smaller than the aperture of the mounting hole 157, and the clamping member 15 is formed with a stepped surface 162 at the junction of the first screw hole 159 and the mounting hole 157. The aperture of the second screw hole 161 is larger than the aperture of the first screw hole 159. The clamping portion 155 defines a plurality of slots 163 extending through the clamping portion 155. The slot 163 extends from the clamping portion 155 away from one end of the connecting portion 151 to the connecting portion 151, thereby dividing the clamping portion 155 into a plurality of clamping jaws 165. The plurality of jaws 165 can be relatively closed.

The ferrule 17 is generally cylindrical. The ferrule 17 includes a main body 171, a limiting portion 173, and a guiding portion 175. The limiting portion 173 extends vertically from the middle of the main body 171 along the radial direction of the main body 171. One end of the body 171 is formed with a guide portion 175 having a diameter slightly smaller than that of the body 171. The outer surface of the main body 171 forms an engaging groove 177 corresponding to the position of the card slot 143 of the inner casing 13. The number of the engaging grooves 177 is two and the positions are opposite. The ferrule 17 is provided with a first through hole 178 through which an optical fiber (not shown) passes and a second through hole 179 through which a cable (not shown) passes. The first through hole 178 extends from the guiding portion 175 to the middle of the main body 171, and the second through hole 179 has a larger diameter than the first through hole 178 and communicates with the first through hole 178.

The snap ring 19 is C-shaped and includes a resisting end 191 and two curved clip arms 193 extending from the abutting end 191. The clamp arm 193 is engageable with the engagement groove 143 of the inner casing 13 and the engagement groove 177 of the ferrule 17.

One end of the plastic optical cable is stripped off part of the first outer skin to expose the second outer skin, and the second outer skin is peeled off to expose the optical fiber.

During assembly, one end of the cable strip is sequentially passed through the outer casing 11, the second screw hole 161 of the clamping member 15, the first screw hole 159 and the second through hole 179 of the ferrule 17, so that the optical fiber extends through the first through hole 178. . The clamping portion 155 of the clamping member 15 is received in the receiving portion 115 of the outer casing 11. The inner casing 13 is sleeved from the guiding portion 175 of the ferrule 17 to the ferrule 17, and the guiding portion 175 of the ferrule 17 is passed through the third portion. Through hole 147, the limiting portion 173 abuts against the resisting surface 138, and the card The ring 19 is sleeved on the ferrule 17 so that each of the clamping arms 193 is simultaneously engaged with one of the engaging grooves 177 and the latching groove 143, and the abutting end 191 abuts the body 131, thereby fixing the ferrule 17 to the inner casing 13. The connecting portion 151 of the clamping member 15 is inserted into the first through hole 135 until the connecting portion 151 abuts the one end of the body 131 away from the insertion portion 133. At this time, the main body 171 of the ferrule 17 is received in the mounting hole away from one end of the guiding portion 175. 157. The exposed portion of the second outer skin of the optical cable is received in the first screw hole 159, and the optical cable is received in the second screw hole 161. The first thread 117 of the outer casing 11 is screwed with the second thread 139 of the inner casing 13, so that the outer casing 11 is gradually sleeved on the inner casing 13, and the receiving portion 115 is sleeved on the clamping portion 155 of the clamping member 15, so that The clamping portion 155 is received in the receiving space 119. During the screwing of the outer casing 11 with the inner casing 13, the inner wall of the receiving portion 115 is pressed against the plurality of jaws 165 of the clamping portion 155 to clamp and fix the optical cable. The threads of the first screw hole 159 and the second screw hole 161 respectively clamp the second outer skin of the optical cable and the first outer skin, thereby clamping and fixing the optical cable.

The optical fiber connector 100 is provided with the first thread 117 and the second thread 139 respectively by the outer casing 11 and the inner casing 13, so that the outer casing 11 is screwed and fixed to the inner casing 13, and the clamping member 15 for clamping and fixing the optical cable is collectively received. The locking effect is better and the structure is simple. The ferrule 17 is fixed to the inner casing 13 by providing the snap ring 19, and the clamping member 15 fixes the optical cable, which is convenient for assembly and disassembly, and can be assembled in the field and completely disassembled.

It can be understood that the limiting portion 173 can be omitted, and the snap ring 19 is sleeved on the ferrule 17 to engage with the engaging groove 177 and the latching groove 143 at the same time, and the ferrule 17 can be fixed to the inner casing 13. The optical fiber connector 100 is not limited to the connection of the plastic optical fiber, and can also be used for the connection of the glass optical fiber. When connecting the glass optical fiber, the fiber layer of the optical cable can be fixed to the first screw hole 159.

Referring to FIG. 4 to FIG. 7, the structure of the optical fiber connector 200 of the second embodiment of the present invention is substantially the same as that of the optical fiber connector 100 of the first embodiment, and the difference is that the light is The fiber connector 200 does not include the snap ring 19, the inner casing 23 is not provided with the card slot 143, and the ferrule 27 is not provided with the engaging groove 177. The limiting portion 273 of the ferrule 27 is formed with the cutting plane 2731 to prevent the ferrule 27 from being relatively opposite. The case 23 is rotated, and the inner case 23 is formed with a projection 249. During assembly, the limiting portion 273 of the ferrule 27 is received in the first through hole 235 and abuts against the resisting surface 238. The protrusion 249 is cut by the flat surface 2731. The ferrule 27 is biased away from the stepped surface 262 by one end of the guiding portion 275. The ferrule 27 is fixed.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

100‧‧‧Fiber Optic Connectors

11‧‧‧Shell

113‧‧‧ fixed department

115‧‧‧ Housing Department

13‧‧‧ inner shell

131‧‧‧Ontology

133‧‧‧Interface

141‧‧ ‧ gap

143‧‧‧ card slot

15‧‧‧Clamping parts

151‧‧‧Connecting Department

153‧‧‧Cars Department

155‧‧‧ gripping department

163‧‧‧ slotting

165‧‧‧claw

17‧‧‧ ferrule

171‧‧‧ Subject

173‧‧‧Limited

175‧‧‧Director

177‧‧‧ snap groove

19‧‧‧ card ring

191‧‧‧Resistance

193‧‧‧ clip arm

Claims (10)

An optical fiber connector comprising a ferrule, an inner casing and an outer casing, wherein the ferrule is provided with a first perforation for the optical fiber to be inserted, the improvement is that the optical fiber connector further comprises a clamping member, the outer casing is provided with the first Threaded, the inner casing includes a body and a plug extending from one end of the body, the outer wall of the body is provided with a second thread screwed to the first thread, and the inner shell is screwed to the second thread by the second thread In the outer casing, the clamping member is disposed between the outer casing and the inner casing, and one end of the clamping member is formed with a mounting hole, the ferrule is inserted into the inner casing, and one end of the ferrule is disposed in the assembling hole The clamping member is provided with one end of the fitting hole abutting against one end of the inner casing and one end of the ferrule, and the other end of the clamping member abuts against the inner wall of the outer casing. The optical fiber connector of claim 1, wherein the body is provided with a first through hole and a second through hole extending from one end of the body away from the insertion portion, the second through hole and the first through hole The through holes communicate and extend to the plug portion. The optical fiber connector of claim 2, wherein the outer casing comprises a fixing portion and an accommodating portion, wherein the first thread is disposed on an inner wall of the fixing portion, and the accommodating portion is away from the end of the inner casing from the fixing portion The outer casing is formed by extending outwardly, and the receiving portion is formed with a receiving space for receiving the clamping member. The optical fiber connector of claim 3, wherein the clamping member comprises a connecting portion, a clamping portion extending from one end of the connecting portion, and a clamping portion extending from the other end of the connecting portion, the assembly a hole extending from the latching portion to the clamping portion, the latching portion being disposed in the first through hole, the connecting portion abutting the body away from the one end of the plugging portion, the clamping portion being received in the receiving portion . The fiber optic connector of claim 4, wherein the clamping portion is provided with a first screw hole and a plurality of slots extending through the clamping portion, the first screw hole is in communication with the mounting hole, and the plurality of openings The groove divides the grip portion into a plurality of jaws that are relatively collapsible. The optical fiber connector of claim 5, wherein the clamping portion is away from the connecting portion A second screw hole is formed at one end, and the second screw hole has a larger aperture than the first screw hole and communicates with the first screw hole. The optical fiber connector of claim 5, wherein the body is formed with an arcuate notch, and an inner wall of the body is formed with a card slot facing the notch, the ferrule being formed corresponding to the card slot The optical fiber connector further includes a snap ring, and the snap ring is simultaneously engaged with the card slot and the engaging groove. The optical fiber connector of claim 5, wherein an inner wall of the inner casing is formed with a resisting surface at a junction of the second through hole and the first through hole, and the clamping member is in the mounting hole And forming a stepped surface at the first screw hole connection, the ferrule includes a main body, a limiting portion extending outward from the middle portion of the main body, and a guiding portion extending from one end of the main body, the limiting element portion resisting the The main body is inserted into one end of the mounting hole to abut the stepped surface, and the insertion portion is provided with a third through hole away from one end of the body, and the guiding portion is received through the third through hole. The optical fiber connector of claim 8, wherein the limiting portion is formed with a cutting plane, and the inner casing is formed with a protrusion that abuts the cutting plane. The optical fiber connector of claim 1, wherein the ferrule is provided with a second through hole for the optical cable to pass through and communicate with the first through hole.