TWI438984B - Optical fiber connector and optical connecting device using the same - Google Patents

Description

Optical fiber connector and optical fiber connecting device using the same

The present invention relates to an optical fiber connector and an optical fiber connecting device using the same.

A fiber optic connection device includes a fiber optic connector and a socket for receiving the fiber optic connector, the fiber optic connector including a housing, a ferrule, a flange, and a rear case. The housing is configured to receive the ferrule body and the elastic member. The one end of the housing forms a limiting flange, and the outer wall of the housing is formed with a positioning protrusion. The ferrule is fixed in the flange, and the casing and the rear casing are fixedly connected by means of a buckle, and the ferrule and the flange are collectively received therein. A through hole for accommodating the optical fiber is opened in the ferrule, and a fiber passage through which the optical fiber passes is opened in the rear case and the flange. The optical fiber passes through the rear case and the flange in sequence, and is fixed in the through hole of the ferrule by resin bonding. The limit flange can abut against the flange to prevent the ferrule from coming out of the housing.

The socket comprises a hollow seat body and a sleeve, and the seat body is provided with a fixed cylinder, and the sleeve is fixed in the fixed cylinder. An elastic hook corresponding to the positioning protrusion of the optical fiber connector housing is formed on the inner wall of the socket. The two fiber connectors are respectively inserted into the socket from one end of the socket, and the elastic hooks are engaged with the positioning protrusions of the fiber connector housing to fix the connector in the socket. The ferrules of the two fiber connectors respectively enter the sleeve from the two ends of the sleeve and abut, and the fibers in the two ferrules are aligned and fitted, so that the optical signal can be transmitted from one fiber connector to another fiber connection. To achieve optical signal transmission.

The ferrule and the sleeve of the above optical fiber connecting device are generally made of ceramic materials, and at the same time, in order to ensure the coaxiality of the optical fiber butt joint, the processing precision of the ferrule and the sleeve is high, so the material and processing cost of the optical fiber connector are both Very high.

In view of the above, it is necessary to provide a lower cost fiber optic connector and its fiber optic connector.

An optical fiber connection device includes a fiber optic connector and a socket for housing the fiber optic connector. The socket includes a seat body and a fixed cylinder disposed in the seat body. The fiber optic connector includes a rear case, a housing fixedly connected to the rear case at one end, and a clamping member located in the rear case. The fiber optic connector further includes a protection member and a first elastic member disposed in the housing. The two ends of the first elastic member respectively abut the rear case and the protection member. The protection member has a through hole for holding the optical fiber cable having the optical fiber and allowing the optical fiber to move through the through hole. The socket further includes a docking member disposed in the fixed cylinder. The docking member is provided with a plug hole corresponding to the through hole, and the docking member is further provided with a venting groove communicating with the plug hole, and the docking member can press the protecting member when the fiber connector is inserted, so that the optical fiber is exposed and Insert into the plug hole.

A fiber optic connector includes a rear case, a housing fixedly connected to the rear case at one end, and a clamping member located in the rear case. An engaging protrusion is formed on the rear case, and an engaging hole that is engaged with the engaging protrusion is opened on the housing. The optical fiber connector further includes a protection member and a first elastic member disposed in the housing, and the two ends of the first elastic member respectively abut the rear housing and the protection member. The protection member has a through hole for holding the optical fiber cable having the optical fiber and allowing the optical fiber to move through the through hole.

The above-mentioned optical fiber connecting device omits the sleeve, and the protective member of the optical fiber connector used can be made of a low-cost material other than ceramic, which contributes to cost reduction. optical fiber The connecting device fiber is connected in a pair of connectors, and only the accuracy of the docking member needs to be ensured during manufacture, so that the two fiber coaxial cables respectively located in the two fiber connectors can be ensured, the manufacturing cost is low, and the transmission loss is small.

100‧‧‧Fiber connection device

21‧‧‧Fiber Optic Connectors

211‧‧‧Shell

2111‧‧‧Limited end

2113‧‧‧ receiving end

2114‧‧‧Limited flange

2115‧‧‧Limited holes

2116‧‧‧ slotting

2117‧‧‧Snap hole

2118‧‧‧ card holder

2119‧‧‧Positioning bulges

212‧‧‧ Shell

2121‧‧‧Sliding hole

2123‧‧‧First sliding part

2125‧‧‧Second sliding part

214‧‧‧protection

2140‧‧‧through hole

2141‧‧‧Limited

2143‧‧‧Director

215‧‧‧First elastic parts

216‧‧‧Clamping parts

2161‧‧‧ Ontology

2163‧‧‧Cylinder

2165‧‧‧ channel

2166‧‧‧ raised parts

2167‧‧‧Fixed holes

2168‧‧‧Resistance tablets

217‧‧‧Second elastic parts

218‧‧‧back shell

2181‧‧‧ Subject

2182‧‧‧Care Department

2183‧‧‧Installation Department

2184‧‧‧ engaging bulge

2185‧‧‧ Guide strip

2186‧‧‧Shoulder

2187‧‧‧First accommodation cavity

2188‧‧‧Second accommodating chamber

219‧‧‧ casing

2191‧‧‧Dust Department

2193‧‧‧ gripping department

23‧‧‧ socket

231‧‧‧

2311‧‧‧ fixed end

2313‧‧‧Interposer

2315‧‧‧ fixed cylinder

2317‧‧‧fixed board

2318‧‧‧ hook

2319‧‧‧ Fixed Department

233‧‧‧Docks

2331‧‧‧ Sockets

2332‧‧‧ Guide groove

2333‧‧‧Ventilation slot

30‧‧‧ optical cable

301‧‧‧ fiber optic

Fig. 1 is a perspective view showing an assembled state of an optical fiber connecting device according to an embodiment of the present invention.

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

3 is an exploded perspective view of the optical fiber connector used in the optical fiber connecting device shown in FIG. 1.

Figure 4 is a cross-sectional view of the fiber optic connector of Figure 3.

Figure 5 is a cross-sectional view of the optical fiber connecting device shown in Figure 1 taken along line V-V.

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 FIG. 1 and FIG. 2, the optical fiber connecting device 100 of the present invention includes two optical fiber connectors 21 and one socket 23 for the two optical fiber connectors 21 to be plugged.

Referring to FIG. 3 and FIG. 4 simultaneously, the optical fiber connector 21 includes a housing 211, a housing 212, a protection member 214, a first elastic member 215, a clamping member 216, a second elastic member 217, a rear housing 218, and a sleeve 219.

The housing 211 is substantially square and includes a limiting end 2111 and a receiving end 2113 opposite to the limiting end 2111. The housing 211 defines a slot 2116 on the opposite side walls of the receiving end 2113 so that the housing 211 can be slightly opened in the extending direction of the slot 2116. The housing 211 further defines an engaging hole 2117 on each of the other opposite side walls. The housing 211 is formed on the outer wall thereof with two opposite holding protrusions 2118, and The positioning protrusions 2119 are formed at a certain distance from the holding protrusions 2118. The latching protrusion 2118 has an elongated shape extending in the longitudinal direction of the housing 211 and has an extended length greater than a longitudinal length of the positioning protrusion 2119 in the longitudinal direction of the housing 211. A limiting flange 2114 is formed on the inner wall of the housing 211 at a position close to the limiting end 2111. The limiting flange 2114 defines a limiting hole 2115.

The outer casing 212 is also square in shape for receiving the housing 211. The outer casing 212 defines an approximately T-shaped sliding hole 2121 on each of the opposite side walls. Each of the sliding holes 2121 includes a first sliding portion 2123 and a second sliding portion 2125. The length of the first sliding portion 2123 is equal to the length of the holding protrusion 2118, but the length is larger than the holding protrusion 2118. When the housing 211 is received in the outer casing 212, the locking protrusion 2118 and the positioning protrusion 2119 respectively Correspondingly located in the first sliding portion 2123 and the second sliding portion 2125, the outer casing 212 can slide on the housing 211.

The guard 214 is generally cylindrical. One end of the protector 214 extends vertically outward in a radial direction to form a finite portion 2141, and the other end forms a guide portion 2143 having a slightly smaller diameter. A through hole 2140 through which the optical fiber 301 passes is opened inside the protection member 214. In the embodiment, the protective member 214 is made of a plastic material.

The clamping member 216 includes a body 2161 and a cylinder 2163 extending outward from one end of the body 2161. The body 2161 and the cylinder 2163 are both cylindrical, and the diameter of the cylinder 2163 is smaller than the diameter of the body 2161. The holder 216 is internally provided with a passage 2165 through which the optical fiber 301 passes (see Fig. 4). The channel 2165 extends through the body 2161 and the cylinder 2163. The cylinder 2163 is formed with an annular projection 2166 on its outer surface. Further, in the cylinder 2163, two opposite square fixing holes 2167 are formed on the surface near the convex portion 2166. The cylindrical body 2163 is bent and extended toward the convex portion 2166 on the edge of each fixing hole 2167 away from the convex portion 2166 to form an elastic pressing piece 2168.

The rear case 218 is made of a plastic material and includes a square main body 2181, an engaging portion 2182 formed at one end of the main body 2181, and a cylindrical mounting portion 2183 formed with the other end of the main body 2181. The engaging portion 2182 is also formed in a square shape, and each of the two opposite outer side walls is convexly formed with an engaging protrusion 2184. The engaging protrusion 2184 has a wedge shape, and the height of the engaging protrusion 2184 is away from the main body 2181. slowing shrieking. The engaging portion 2182 protrudes outwardly from the other two outer side walls in a direction away from the main body 2181, and a guiding strip 2185 corresponding to the slot 2116 of the housing 211. The mounting portion 2183 is for mounting a sheath. The rear casing 218 is hollow, and the inner wall of the rear casing 218 is formed with a circular shoulder portion 2186 at the boundary between the main body 2181 and the mounting portion 2183. The shoulder portion 2186 divides the inner space of the rear casing 218 into the first accommodating cavity 2187 and The second receiving cavity 2188. The first accommodating cavity 2187 is for accommodating the body 2161 of the clamping member 216, and the second accommodating cavity 2188 is for accommodating the sleeve 219 and the partial cylinder 2163.

The sleeve 219 is a plastic tube having an inner diameter corresponding to the cylinder 2163 of the clamping member 216 and sleeved on the cylinder 2163. The sleeve 219 is slightly longer than the cylinder 2163, and the inner wall of the sleeve 219 is formed with an annular dustproof portion 2191 at a position close to one end, and the inner diameter of the dustproof portion 2191 is equivalent to the outer diameter of the optical cable 30. The inner wall of the sleeve 219 is extended inwardly away from the end of the dustproof portion 2191 to form a clamping portion 2193.

One end of the optical cable 30 is stripped of a portion of the outer skin to expose an optical fiber 301 for mounting in the optical fiber connector 21.

When the optical fiber connector 21 is assembled, the optical fiber 301 of the optical cable 30 passes through the sleeve 219, the second accommodating cavity 2188 of the rear housing 218, the first accommodating cavity 2187, the second elastic member 217, and the channel 2165 of the clamping member 216. And protruding from the inside of the body 2161 of the clamping member 216. The cylinder 2163 of the clamping member 216 penetrates from the first accommodating cavity 2187 of the rear casing 218, and the boss 2166 of the cylinder 2163 presses against the shoulder 2186 of the rear casing 218, making it slightly elastic. The deformation is made and enters the second accommodating cavity 2188. The two ends of the second elastic member 217 respectively abut the body 2161 of the clamping member 216 and the shoulder portion 2186 of the rear casing 218, so that the convex portion 2166 of the cylindrical body 2163 abuts against the shoulder portion 2186 of the rear casing 218, thereby clamping The member 216 is secured within the rear housing 218. The sleeve 219 is sleeved and fixed on the cylinder 2163, and the clamping portion 2193 of the sleeve 219 is pressed to gather the two pressing pieces 2168 to clamp the fixing cable 30. The dustproof portion 2191 of the sleeve 219 surrounds and abuts the outer sheath of the optical cable 30 to prevent dust from entering the inside of the optical fiber connector 21. The first elastic member 215 and the protective member 214 are sequentially sleeved on the optical fiber 301 such that the optical fiber 301 is located in the through hole 2140 of the protective member 214 and is flush with the end surface of the protective member 214 forming one end of the limiting portion 2141. The first elastic member 215 and the protective member 214 are placed in the housing 211, and the guiding strip 2185 of the rear housing 218 is aligned with the slot 2116 of the housing 211 to the housing 211, and the engaging protrusion 2184 of the rear housing 218 is pressed. The inner wall of the housing 211 opens the receiving end 2113 of the housing 211 slightly, and finally the rear housing 218 penetrates into the housing 211, and each of the engaging protrusions 2184 is engaged with an engaging hole 2117, thereby The 211 is fixed to the rear case 218. The protection member 214 and the first elastic member 215 are received in the housing 211. The two ends of the first elastic member 215 respectively abut the main body 2181 of the rear housing 218 and the limiting portion 2141 of the protection member 214, so that the protection member 214 is provided with a guiding portion. One end of 2143 passes through the limiting hole 2115 of the housing 211 and partially protrudes outside the housing 211. The limiting portion 2141 of the protecting member 214 abuts against the limiting flange 2114 of the housing 211, so that the protecting member 214 cannot be removed from the housing 211, and the protecting member 214 can compress the first elastic member 215 and be inside the housing 211. slide. The housing 212 is inserted into the housing 212 by pressing, and the latching protrusion 2118 is located in the first sliding portion 2123 and the second sliding portion 2125 of the sliding hole 2121 corresponding to the positioning protrusion 2119, so that the housing 212 is provided. It can slide on the outer wall of the housing 211. Both the holding protrusion 2118 and the positioning protrusion 2119 can play a limit role during the sliding process.

Referring to FIG. 2 and FIG. 5 simultaneously, the socket 23 includes two bases 231 and a pair of connectors 233. Each of the bodies 231 includes a fixed end 2311, a plug end 2313, and is located in the fixed end 2311. The fixing cylinder 2315 and the fixing plate 2317 that fixes the fixing cylinder 2315 in the seat body 231. The fixing plate 2317 further extends toward the insertion end 2313 to form two elastic hooks 2318. The two hooks 2318 are respectively located on two sides of the fixing cylinder 2315. The two hooks 2318 are used to hold the latching protrusions 2118 of the housing 211. A fixing portion 2319 is formed on the inner wall of the fixing cylinder 2315 so as to extend radially inward from the fixing cylinder 2315 at an end away from the fixing plate 2317. The docking member 233 is a ferrule having an insertion hole 2331 for receiving the optical fiber 301. A funnel-shaped guide groove 2332 is defined at each end of the abutting member 233. The smaller end of the guiding groove 2332 communicates with the insertion hole 2331. A venting groove 2333 communicating with the insertion hole 2331 is defined in the middle of the abutting member 233. The fixed ends 2311 of the two bases 231 are fixed together, the two fixed cylinders 2315 are connected to each other and the butt joints 233 are collectively received, and the fixing portions 2319 are fixed to the opposite ends of the docking members 233 to fix the docking members 233 to form the sockets 23.

In use, a fiber optic connector 21 is inserted from the socket 231 of the socket 231 of the socket 23, and the guiding portion 2143 of the protecting member 214 is aligned with the abutting member 233. The outer casing 212 presses the hook 2318 to open the optical fiber connector. 21 slides toward the fixing plate 2317 until the guide portion 2143 penetrates into the fixing cylinder 2315 and abuts against the abutting member 233. At this time, the hook 2318 holds the latching protrusion 2118 located in the first sliding portion 2123 of the outer casing 212, and fixes the optical fiber connector 21 in the socket 23. The abutting member 233 presses the guide portion 2143 of the protector 214 such that the protector 214 compresses the first elastic member 215 and slides toward the rear case 218. The optical fiber 301 is exposed from the protective member 214 and penetrates into the abutting member 233 from the insertion hole 2331 of the abutting member 233. The guiding groove 2332 can serve as a guiding function. Even if the protecting member 214 is slightly misaligned with the axial direction of the abutting member 233, the optical fiber 301 can be slid into the abutting member 233 along the side wall of the guiding groove 2332. In the same manner, another identical fiber connector 21 can be inserted into the socket 23 from the other plug end 2313 of the socket 23, and the optical fiber 301 within the two fiber connectors 21 can be docked in the docking member 233. The venting groove 2333 can release the air in the abutting member 233 when the optical fiber 301 penetrates the abutting member 233, so that the optical fiber 301 can smoothly penetrate the abutting member 233. Inside. Thus, the optical fiber connecting device 100 is formed, and the optical signal can be transmitted from the optical fiber 301 of one optical fiber connector 21 to the optical fiber 301 of the other optical fiber connector 21 to realize optical communication.

The optical fiber connecting device 100 omits the sleeve, and the optical fiber connector 21 used therein does not need to be made of a ceramic material, and the cost is low. The optical fiber connecting device 100 is connected to the pair of connectors 233. Only the insertion holes 2331 of the connecting member 233 are processed accurately, so that the two optical fibers 301 respectively located in the two optical connectors 21 are coaxial, and the transmission loss is small. And the manufacturing cost is lower.

The fiber optic connection device 100 is not limited to the docking of two identical fiber optic connectors 21, and can also be used to interface the fiber optic connector 21 with a conventional fiber optic connector. At this time, a sleeve needs to be added to the fixing cylinder 2315, and the length of the abutting member 233 is shortened and disposed in one of the bodies 231 of the socket 23. Thus, only one of the two bodies 231 of the socket 23 is provided with a body 231. The docking member 233 is for plugging the fiber optic connector 21, and the other body 231 is for receiving a common fiber optic connector. The optical fiber connector 21 is inserted from the base 231 provided with the abutting member 233, and the optical fiber 301 is inserted into the insertion hole 2331. The common optical fiber connector is inserted from the other body 231, and the ferrule is inserted into the sleeve and the abutting member. 233 coaxial docking for optical communication.

When the optical fiber connector 21 is connected to the light receiving device, the number of the seats 231 of the socket 23 may be one. The fixed end 2311 of the base 231 is directly fixed to the light receiving device, and the optical fiber connector 21 is inserted into the base 231 from the insertion end 2313 to directly communicate with the light receiving device, and optical communication can also be realized.

The optical fiber connector 21 mechanically fixes the optical fiber 301, and the end surface of the optical fiber 301 can be pre-polished, and the optical fiber connector 21 can be assembled on site for fiber-to-the-home installation. Moreover, the optical fiber connector 21 of the present invention does not need to be provided with a short insertion in the housing 211. The fiber stub is docked at the break point to further reduce optical transmission losses.

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 a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

2118‧‧‧ card holder

231‧‧‧

2311‧‧‧ fixed end

2313‧‧‧Interposer

2315‧‧‧ fixed cylinder

2317‧‧‧fixed board

2318‧‧‧ hook

2319‧‧‧ Fixed Department

2331‧‧‧ Sockets

2332‧‧‧ Guide groove

Claims (8)

An optical fiber connecting device comprising a fiber optic connector and a socket for receiving the optical fiber connector, the socket comprising a base body and a fixing cylinder disposed in the seat body, the optical fiber connector comprising a rear shell and a shell fixedly connected to the rear shell at one end The improvement of the clamping member in the rear casing is that the optical fiber connector further comprises a protection member disposed in the casing and the first elastic member, wherein the two ends of the first elastic member respectively abut the rear casing and the a protection member having a through hole for clamping the optical fiber cable having the optical fiber and allowing the optical fiber to be movably disposed in the through hole; the socket further comprising a docking member disposed in the fixed cylinder, the docking The insertion hole corresponding to the through hole is opened in the piece, and the abutting member further has a venting groove communicating with the insertion hole, and the connecting piece can press the protection member when the optical fiber connector is inserted, so that the optical fiber It is exposed and inserted into the insertion hole. The optical fiber connecting device according to claim 1, wherein the protective member is made of a plastic material. The optical fiber connecting device of claim 1, wherein the housing is formed with a holding protrusion, and a hook hooked with the holding protrusion is formed in the body. An optical fiber connector comprising a rear casing, a casing fixedly connected to the rear casing at one end, and a clamping member located in the rear casing, wherein the rear casing is formed with a locking protrusion, and the casing is opened a locking hole that is engaged with the engaging protrusion, the optical fiber connector further includes a protection member and a first elastic member disposed in the housing, the two ends of the first elastic member respectively abut the rear housing and the And a protection member having a through hole for clamping the optical fiber cable having the optical fiber and allowing the optical fiber to move through the through hole. The optical fiber connector of claim 4, wherein the protective member is made of a plastic material. The fiber optic connector of claim 4, wherein the clamping member comprises a body and is located a cylinder at one end of the body, the clamping member is provided with a passage for the optical cable to pass through, and the cylinder is provided with a fixing hole communicating with the passage, and the cylinder is formed with an elastic pressing force on the edge of the fixing hole. The optical fiber connector further includes a sleeve sleeved on the cylinder, the sleeve being gathered against the pressing piece to clamp the optical cable. The fiber optic connector of claim 6, wherein the rear case comprises a first receiving cavity for receiving the body of the clamping member and a second receiving cavity for receiving the cylindrical body, the rear housing is first a shoulder portion is formed at a boundary between the cavity and the second accommodating cavity, and the boss is formed with a convex portion corresponding to the shoulder, the optical fiber connector further includes a second elastic member, and the second elastic member sleeve Provided on the cylinder, the second elastic member abuts against the clamping body, and the other end abuts the shoulder, so that the convex portion of the clamping member abuts the shoulder, thereby clamping the clamping member The piece is fixed in the rear case. The optical fiber connector of claim 4, wherein a limiting flange is formed in the housing, and the protection member is formed with a limiting portion abutting against the limiting flange to prevent the protective member from being removed from the housing. Get out of the body.