JP3885889B2 - Optical fiber connection device - Google Patents

Description

The present invention relates to an optical fiber connection device, and more particularly to an optical fiber connecting device for coupling a fiber optic plug.

As the progress of optical fiber communication progresses, the needs of optical fiber connection devices increase one after another, and optical elements are usually installed inside the optical fiber connection devices, and the optical performance of the optical elements is affected by dust or foreign matter. In order to avoid this, and in order to avoid damaging the eyes of the operator due to direct emission of the optical signal generated by the optical element, it is necessary to perform sealing at the entrance of the optical fiber connection device. .

FIG. 1 is an explanatory view showing an optical fiber connection device 1a according to the first prior art. In the optical fiber connection device 1a, the above-mentioned purpose is achieved by using the structure of a dustproof plug 12a. Before the connection device body 11a is connected to another optical device, the dust-proof plug 12a is attached to the optical fiber insertion hole of the connection device body 11a to realize the function of sealing the optical fiber insertion hole. Can be prevented. However, the dust-proof plug 12a claimed in the first prior art must be provided with a handle so that it can be used for extraction. When discussing from the shape of the dust-proof plug 12a, the handle protrudes. The external shape becomes excessive. Further, when connecting to an optical device such as an optical fiber cable, the dustproof plug 12a must be removed. Therefore, when connecting the connection device main body 11a with another optical device, it is necessary to take care to remove the dustproof plug 12a and store it. If you do not select, you may experience problems such as lost or accidentally swallowed by children. In addition, in the test work for mounting the semiconductor device electronic device for optical signal transmission or reception, the chuck can be executed only when the dust-proof plug 12a is first removed, and it can be shipped only when the dust-proof plug 12a is attached again after that. . Therefore, in the case of practical use, the dustproof plug 12a not only makes the removal process complicated, but also increases the cost of assembly and testing.

  2A and 2B are explanatory views showing a second type of prior art side open type optical fiber connecting device 2a, which has a holding spring 23a in the connecting device main body 21a, and the spring 23a. Is in contact with the rear surface of the shielding plate 24a and the inner surface of the connection device main body 21a, and a shaft portion 22a as a pivot is attached to the shielding plate 24a, and is fixed to the connection device main body 21a by another fixed frame. According to the insertion and extraction of the optical fiber plug 6a, the turning is automatically opened or closed. That is, when the connection device body 11a is not connected to another optical device, the shielding plate 24a closes the optical fiber insertion hole, and when the optical fiber plug 6a is to be inserted, the optical fiber plug 6a raises the shielding plate 24a, and The shaft portion 22a is used as a turning shaft, and after turning to the inner surface of the connecting device main body 21a facing inward, the shielding plate 24a is opened. When the optical fiber plug 6a is to be extracted, the shield plate 24a is automatically closed using the recovery force (elastic force) of the spring 23a.

  Generally speaking, the optical fiber plug 6a has a pair of semicircular band-shaped projections for guiding at the outer edge thereof, and these are aligned with the guide slits in the optical fiber insertion hole, so that the optical fiber plug 6a. Will guide you through the smooth insertion. However, the optical fiber connecting device 2a of the second type of prior art uses the shielding plate 24a to open the side open type (width direction open type) and provides the guide slit in the shielding plate 24a. In addition, a projection for sealing the guide slit on one side is provided, and when the optical fiber plug 6a is inserted, the projection is accommodated inside the optical fiber insertion hole according to the opening of the shielding plate 24a, and the shielding plate 24a is placed on the one side. The guide slit is formed, whereby the optical fiber plug 6a is smoothly inserted into the optical fiber insertion hole. However, since the shield plate 24a is attached to the fixed frame after the minute shaft portion 22a is attached to the fixed frame, the optical fiber plug of the guide slit formed by the shield plate 24a is connected to the fixed frame, the connection device main body 21a, and the spring 23a. 6a may be reduced as its own activity and tolerances after connecting the respective members increase, and in addition, the second type of prior art optical fiber connection device The buffer piece 25a included in the optical fiber insertion hole 2a can simply generate an effect of limiting the depth with respect to one side of the optical fiber plug 6a, and the guide slit on one side generated by the shielding plate 24a can be fixed. Since it is inferior, the limiting performance of the buffer piece 25a may be reduced.

  FIG. 3A and FIG. 3B show a third type of prior art top open type optical fiber connecting device 3a, which has a shaft portion 32a as a turning shaft attached to a connecting device main body 31a and a pair of supports. A spring 33a having a frame is attached, and each front part of the spring 33a is connected to the rear part of the shielding plate 34a and the inner upper part of the connection device main body 31a. 34a automatically pivots open or closes. In other words, when the optical fiber plug 6a is to be inserted by sealing the optical fiber insertion hole by a method in which the shielding plate 34a abuts against the inner side surface of the connection device main body 31a when not in use, the optical fiber plug 6a is shielded. The plate 34a is supported, and the shaft 32a is turned toward the inside of the connection device main body 31a with the turning shaft 32a as a turning shaft, and then the shielding plate 34a is opened. Further, after the optical fiber plug 6a is extracted, the shield plate 34a is closed so as to automatically return to the original state by the recovery force (elastic force) of the spring 33a.

  However, when the optical fiber plug 6a is to be inserted, there is a possibility that the amount of load on the shaft portion 32a may be strengthened, which may damage the shaft portion 32a. In order to avoid this, it is necessary to make the shaft portion 32a with a hard metal gentle material, which may increase the material cost, and the spring 33a is attached by a method in which the metal shaft portion 32a penetrates. And it is necessary to fit in the shielding plate 34a, and in that case, the shielding plate assembly member to which the spring 33a is attached can be completed. Therefore, it takes time and labor to assemble.

  FIG. 4 shows a fourth type of prior art top open type optical fiber connecting device 4a, which attaches a shield plate 44a having a plate spring 43a and a shaft portion 42a to a connecting device main body 41a. As in the third type of prior art optical fiber connection device 3a, the shielding plate 44a automatically pivots upward or downward in accordance with the insertion or removal of the optical fiber plug 6a. However, the plate-like spring 43a (similar to the third type of prior art) also increases the amount of load on the shaft portion 42a as the optical fiber plug 6a is inserted, and decreases its service life.

  FIG. 5 shows a bottom-open type optical fiber connecting device 5a of the fifth type of prior art. The connecting device main body 51a is made of an elastic object as an elastic shielding plate 54a, and its elasticity is shown. A closing recovery force that automatically returns to the original state is generated by the elastic force of the shielding plate 54a itself, and the elastic shielding plate 54a is automatically opened inward according to insertion or extraction of the optical fiber plug 6a. Open or close after turning. The optical fiber connecting device 5a increases the area of the elastic shielding plate 54a to seal the guide slit, and the guide slit cannot be formed to extend toward the rear of the optical fiber insertion hole. It can be formed in the vicinity of the entrance of the optical fiber insertion hole, the optical fiber plug 6a cannot be stably inserted under the guidance of the guide / slit, and good optical coupling with the optical element cannot be performed. End up. Among them, the elastic shielding plate 54a cannot be bent as the optical fiber plug 6a enters, which easily causes elastic fatigue at the bent portion and cannot return to the closed state and lose its effectiveness.

  At the same time, the third type prior art, the fourth type prior art, and the fifth type prior art cannot all limit the insertion depth of the optical fiber plug 6a. May cause contact friction between the surface and the surface of the optical element, and may reduce the intensity of the optical signal to be transmitted by shaving, so that the system may erroneously determine the signal. There is a risk of inviting.

The object of the present invention is to avoid the complicated assembly steps generated by using the dust-proof cover of the swing open type and the separation type, which is convenient for use and test, and is accidentally swallowed by children. Accordingly, an object of the present invention is to provide an optical fiber connecting device that can avoid this, has a simple structure, is stable, can improve the efficiency of assembly and testing, and can realize cost reduction.

Another object of the present invention is to provide an optical fiber connection device that can achieve the effect of dust prevention and foreign matter intrusion.

Another object of the present invention is to provide an optical fiber connecting device that can ensure the accuracy of assembly by adopting a deterioration prevention design.

Another object of the present invention is to provide an optical fiber connecting device having an effect of limiting the insertion depth of the optical fiber plug.

Another object of the present invention is to provide an optical fiber connection device having an effect of improving the matching accuracy between the optical fiber connection device and an element for transmitting or receiving an optical signal.

In order to achieve each of the above-mentioned objects, the present invention is an optical fiber connecting device applied to an optical fiber plug, and mainly includes a main body and a U-shaped cover that covers the main body. Engagement tanks are formed at the upper and lower edges of the left and right sides, respectively, and the U-shaped cover includes an insertion port and left and right side plates connected to the insertion port. The part has an integrally formed dustproof lid extending downward from the upper edge part, and the two side plates are closely aligned with the engagement tank along their upper and lower edge parts. There is provided an optical fiber connecting device having an abutting surface formed on the optical fiber.

  In order to further elucidate the technical contents of the present invention and the features thereof, preferred embodiments of the present invention will be described in detail and specifically with reference to the accompanying drawings. Needless to say, this is merely useful for explaining the present invention and does not limit the claimed scope of the present invention in a narrow sense.

The present invention provides a kind of optical fiber connection device, wraps the main body with a U-shaped cover, engages the left and right side plates of the U-shaped cover with the engagement tanks at the upper and lower edge portions of the left and right sides of the main body, The U-shaped cover is formed with an insertion opening for a dustproof lid that is extended so as to be integrally formed downward from the upper edge portion thereof, and the both side plates are connected to the engagement tank along the upper and lower edge portions. close to having an abutment surface to be fit, these, and the body and the cover form an optical fiber connection device having a dustproof cover, its structure is simple, and a stable, convenient manner for use, It is also convenient for testing, can improve the efficiency of assembly and testing, can lower the cost, avoids the complicated number of assembling steps generated by a separate dustproof lid, and is accidentally swallowed by children End up Also it is avoided.

As shown in FIGS. 6A to 6C, the optical fiber connecting device 7 provided by the present invention mainly includes a main body 71, and a U-shaped cover 72 wrapped in its body 71.

  As shown in FIGS. 7A to 7C, the main body 71 has an insertion base 711, inner guide slits 7121 provided on the left and right inner wall portions 712 of the insertion base 711 along the insertion direction, Engagement tanks 7131 provided along the upper and lower ends of the left and right outer wall portions 713 of the base 711 are formed.

  As shown in FIGS. 8A to 8C, the U-shaped cover 72 has an insertion port portion 721 and left and right side plates 722 connected to the insertion port portion 721, and the insertion port portion 721 includes the insertion port portion 721. Is provided with outer guide slits 7211 along the insertion direction, which are located on the left and right inner sides, and integrally formed dustproof lids 723 extending downward from the upper edge of the insertion port portion 721. The plates 722 have a contact surface 7221 closely aligned with the engagement tank 7131 along the upper and lower edges, and the outer guide slit 7211 has no difference in height, and the inner guide It is connected to the slit 7121.

  As shown in FIG. 10, the U-shaped cover 72 covers the main body 71, and the engagement tank 7131 in the main body 71 is closely aligned with the abutting surfaces 7221 of both side plates 722 of the U-shaped cover 72. In addition to simplifying the structure of 72, the purpose of stably adhering to the main body 71 can be achieved.

  Further, as shown in FIGS. 6C, 7C, 8C, and 10, the outer wall portions 713 of the main body 71 are provided with two locking masses 714 at their tail ends, respectively, and a U-shaped cover 72 is provided. The side plates 722 are further formed with an inverted T-shaped portion 727 at their tail ends, and are engaged with each other so as to correspond to the two locking masses 714.

  Further, as shown in FIGS. 6C, 7B, 7C, 8B, 8C, and 10, the inverted T-shaped portion 727 has a head portion 7271, left and right ends of the head portion 7271, and the front side thereof. The guide slopes 7272 and 7273 are all formed, whereby the upside-down T-shaped portion 727 smoothly moves along the insertion direction in the engagement tank 7131, and the U-shaped cover 72 covers the main body 71. The two locking lumps 714 are formed in a wedge shape such that the front is narrow and the rear is wide along the insertion direction. Therefore, the inverted T-shaped portion 727 slides between the two locking lumps 714 and engages them. To do.

  As shown in FIG. 11A, an optical fiber connection device 7 provided by the present invention is applied to an optical fiber plug 6. The optical fiber plug 6 includes a plug 61 and the side of the plug 61 facing both the left and right sides. A semicircular belt-like protrusion (not shown) provided on the plug 61, a fitting insertion part 62 provided on the front end of the plug 61, and upper and lower locking members 63 and 64 on both upper and lower surfaces protruding from the plug 61, Have

  As shown in FIG. 11B, the inner guide slit 7121 in the main body 71 and the outer guide slit 7211 of the U-shaped cover 72 all correspond to the semicircular belt-like protrusions of the optical fiber plug 6, thereby Guide the insertion of the optical fiber plug 6.

  As shown in FIG. 8C, the back surface of the dust-proof lid 723 of the U-shaped cover 72 is connected to the insertion port portion 721, and a recess 7231 is formed at the upper edge thereof, thereby forming the dust-proof lid 723 and the insertion port portion. A sufficient space is reserved at the connection point with 721, and the dust cover 723 is set to be able to turn backward.

  As shown in FIG. 8A, the insertion port 721 of the U-shaped cover 72 is formed with a recessed tank 724 recessed at the upper edge, and the recessed tank 724 faces downward to a predetermined distance d of the dust-proof lid 723. After extending, a concave surface 725 having the same depth is formed, and a concave tank 724 is introduced in accordance with the upper locking member 63 in the optical fiber plug 6 (see FIG. 11B). It is introduced into the concave tank 724 according to the plug 6 and guided to the concave surface 725 along the insertion direction (see FIG. 11C). Therefore, the concave surface 725 whose depth is set in the same manner as the concave tank 724 is connected to the concave tank 724. The function of continuing the guidance that follows is provided, and the depth at which the predetermined distance d is inserted into the upper locking member 63 can be determined and controlled.

  As shown in FIG. 8A, two sliding surfaces 728 are formed at the left and right ends of the bottom edge of the insertion port portion 721 of the U-shaped cover 72, respectively. An error that can be used together with a guide surface (not shown), and that the sliding surface 728 restricts the bottom edge of the fitting insertion portion 62, thereby preventing the U-shaped cover 72 from being inserted in the opposite direction. An operation prevention structure is formed.

  As shown in FIG. 8C, the insertion port 721 of the U-shaped cover 72 corresponds to the lower locking member 64, and a sliding tub 726 having a predetermined length b is formed on the bottom edge thereof inwardly. When the guide tank 7261 is formed with a guide slope 7261 at the rear end thereof and the optical fiber plug 6 is introduced into the optical fiber connection device 7, the lower locking member 64 can smoothly slide on the guide slope 726, and the insertion port 721 can be engaged with the bottom edge (see FIG. 11C).

9A and 9B, the U-shaped cover 72 is integrally formed of an elastic material, and the front surface of the dust-proof cover 723 is a protrusion formed on the upper edge of the insertion port 721. The elasticity of the projecting arc part 7231 can be adjusted by adjusting the size and the position of the projecting arc part 7231 connected to the arc part 7231, and the optical fiber plug 6 is extracted to the dustproof lid 723 by the adjustment. Later elastic recovery force can be applied.

  In the present invention, the insertion opening 721 is shielded by the dust-proof lid 723, so that the effect of dust-proofing and entry of foreign matter can be realized.

  The concave surface 725 and the sliding tank 726 provided by the present invention together limit the insertion depth of the upper and lower locking members 63 and 64 of the optical fiber plug 6.

  The inner guide slit 7121 and the outer guide slit 7211 provided by the present invention guide the semicircular band-shaped protrusion of the optical fiber plug 6 together, and the arrangement of the concave tank 724 and the sliding tank 726 is the same. Thus, it is possible to guide the upper and lower locking members 63 and 64 in the optical fiber plug 6 to match the optical signal receiving or transmitting element provided in the optical fiber plug 6 and the optical fiber connecting device 7.

  The present invention provides the engagement tank 7131 and the contact surfaces 7221 of the two side plates 722, the upside-down T-shaped portion 727 and the two locking masses 714 that fit together. Thus, the tightness of the assembly can be ensured.

  The present invention provides a U-shaped cover 72 in a reverse direction upward and downward by providing a mutually limited insertion opening 721 and restricting the bottom edge of the fitting insertion portion 62 by a front sliding surface 728. Can be prevented from being inserted.

According to the present invention, it is possible to avoid complicated steps of assembly, convenient for use and testing, avoiding accidental drinking by children, simple structure, stable, assembly and testing. An optical fiber connection device that can improve efficiency and reduce costs can be provided.

  As described above, the present invention can surely achieve the expected purpose and effect, but the technical means listed above are merely preferred embodiments of the present invention, and the gist and features of any of the present invention. It goes without saying that all modifications and changes carried out on the basis of this shall be delivered within the scope of the claimed invention.

It is application explanatory drawing which shows the 1st type conventional optical fiber connection apparatus. It is explanatory drawing which shows the 2nd type of conventional optical fiber connection apparatus. It is explanatory drawing which shows the 2nd type of conventional optical fiber connection apparatus. It is explanatory drawing which shows the 3rd type of conventional optical fiber connection apparatus. It is explanatory drawing which shows the 3rd type of conventional optical fiber connection apparatus. It is explanatory drawing which shows the 4th type conventional optical fiber connection apparatus. It is explanatory drawing which shows the 5th type conventional optical fiber connection apparatus. It is a front view which shows the optical fiber connection apparatus of this invention. It is a top view which shows the optical fiber connecting device of this invention. It is a side view which shows the optical fiber connecting device of this invention. It is a front view which shows the main body of the optical fiber connecting device of this invention. It is a top view which shows the main body of the optical fiber connecting device of this invention. It is a side view which shows the main body of the optical fiber connecting device of this invention. It is a front view which shows the cover of the optical fiber connecting device of this invention. It is a top view which shows the cover of the optical fiber connecting device of this invention. It is a side view which shows the cover of the optical fiber connecting device of this invention. It is a front view which shows other embodiment of the cover of this invention. It is a side view which shows other embodiment of the cover of this invention. It is explanatory drawing which shows the assembly mode of the main body and cover of this invention. It is explanatory drawing which shows the mode of the unconnected state of the optical fiber connecting device of this invention. It is explanatory drawing which shows a mode during the connection of the optical fiber connecting device of this invention. It is explanatory drawing which shows the mode after the completion of the connection of the optical fiber connecting device of this invention.

Explanation of symbols

6 Optical fiber plug 7 Optical fiber connector 61 of the present invention Plug 62 Insertion insert 63 Upper locking member 64 Lower locking member 71 Main body 72 Cover 711 Insertion base 712 Inner side wall 713 Outer side wall 714 Locking block 721 Insert port 722 Side plate 723 Dustproof lid 724 Concave tank 725 Concave surface 726 Sliding tank 727 Upside down T-shaped part 728 Sliding surface 7121 Inner guide / slit 7131 Engaging tank 7211 Outer guide / slit 7221 Abutting surface 7231 Recessed part 7271 Head Part 7272, 7273 Guide slope

Claims (19)

A plug, a semi-circular belt-like protrusion provided on both the left and right sides of the plug, an upper locking member and a lower locking member that are arranged to project on both the upper and lower surfaces of the plug, and a tip of the plug An optical fiber connecting device coupled with an optical fiber plug comprising a fitted insertion portion,
The insertion base and the inner guide / slits corresponding to the semicircular belt-like projections are provided on the left and right inner side wall portions of the insertion base along the insertion direction of the plug, and the insertion insertion A main body having an engagement tank disposed along upper and lower end edges of the left and right side walls of the base;
And the insertion opening, and the left and right side plates are to be connected with the insertion opening, outside the insertion opening corresponding with are arranged along the insertion direction of right and left inner, respectively the semicircular strip projections and square guide slit extending downwardly from the top edge of the insertion opening, and a dust-proof cover which is integrally molded, close to said engaging tank the two side plates to each other along the vertical edges A U-shaped cover that covers the main body and has an abutting surface that is adapted to the outer guide slit, and is configured to be connected to the inner guide slit so that the outer guide slit does not have a height difference; ,
An optical fiber connection device comprising: The U-shaped cover is integrally formed of an elastic material ,
The optical fiber connection device according to claim 1. A concave tub is formed at the upper edge of the insertion port of the U-shaped cover,
On the front surface of the dustproof lid, a concave surface is formed in a region adjacent to the upper edge of the insertion port,
The depth of the concave surface is the same as the depth of the concave tank, and when the dust cover is rotated inward along the insertion direction, the concave tank and the concave surface are the upper locking member and Characterized by locking ,
The optical fiber connection device according to claim 1. Wherein the insertion opening of the U-shaped cover, the bottom edge facing the lower locking member, wherein the sliding tank having a predetermined length are formed facing inward,
The optical fiber connection device according to claim 1. A guide slope is formed at the rear end of the sliding tank,
The optical fiber connection device according to claim 4. The recessed portion on the back surface of the upper edge portion is formed in the insertion opening of the U-shaped cover, and sets rotatably the dustproof cover backwards,
The optical fiber connection device according to claim 1. A protruding arc portion is further formed on the front surface of the upper edge portion of the insertion port portion of the U-shaped cover, and the elastic recovery force of the dustproof lid is adjusted after the optical fiber plug is extracted. to,
The optical fiber connection device according to claim 1. Two locking lumps are formed at each tail end of the two outer side wall portions of the main body, and an upside-down T-shaped portion is formed at the tail ends of the side plates of the U-shaped cover, The upside-down T-shaped part is fitted into the two locking lumps ,
The optical fiber connection device according to claim 1. Wherein the upside down T-shaped section includes a head portion, said and a left and right ends and the guide slopes are disposed on the front side of the head portion, placed steadily the engagement chamber of the inverted T-shaped portion Moving along the insertion direction, the U-shaped cover is covered by the body,
The optical fiber connection device according to claim 8. The two locking lumps each other, narrow front end along the insertion direction, a wedge formed to the rear end is wider, locks the inverted T-shaped portion in the two locking lump together characterized in that it makes,
The optical fiber connection device according to claim 8. A fiber optic connecting device for coupling a fiber optic plug,
The body,
A U-shaped cover covering the body ;
With
In the main body, engagement tanks are respectively formed at upper and lower end edges of the left and right sides of the main body,
The U-shaped cover includes an insertion port and left and right side plates connected to the insertion port, and the insertion port extends downward from the upper edge of the insertion port. Having a dustproof lid, the two side plates have a contact surface closely aligned with the engagement tank along the upper and lower edges of the two side plates;
A concave tub is formed at the upper edge of the insertion port of the U-shaped cover, and a concave surface is formed in a region adjacent to the upper edge of the insertion port on the front surface of the dustproof lid. The depth is the same as the depth of the concave tank, and when the dust cover is rotated inward along the insertion direction of the optical fiber plug, both the concave tank and the concave surface are the optical fiber plug and Characterized by locking ,
Optical fiber connection device. The U-shaped cover is integrally formed of an elastic material ,
The optical fiber connection device according to claim 11. Wherein the bottom edge of the insertion opening of the U-shaped cover, wherein the sliding tank having a predetermined length directed inwardly are formed,
The optical fiber connection device according to claim 11. A guide slope is formed at the rear end of the sliding tank ,
The optical fiber connection device according to claim 13 . The recessed portion on the back surface of the upper edge portion is formed in the insertion opening of the U-shaped cover, and sets rotatably the dustproof cover backwards,
The optical fiber connection device according to claim 11. A protruding arc portion is further formed on the front surface of the upper edge portion of the insertion port portion of the U-shaped cover, and the elastic recovery force of the dustproof lid is adjusted after the optical fiber plug is extracted. to,
The optical fiber connection device according to claim 11. Two locking lumps are formed at each tail end of the two outer side wall portions of the main body, and an upside-down T-shaped portion is formed at the tail ends of the side plates of the U-shaped cover, The upside-down T-shaped part is fitted into the two locking lumps ,
The optical fiber connection device according to claim 11. Wherein the upside down T-shaped section includes a head portion, said and a left and right ends and the guide slopes are disposed on the front side of the head portion, placed steadily the engagement chamber of the inverted T-shaped portion Moving along the insertion direction, the U-shaped cover is covered by the body,
The optical fiber connection device according to claim 17. The two locking lumps each other, narrow front end along the insertion direction, a wedge formed to the rear end is wider, locks the inverted T-shaped portion in the two locking lump together characterized in that it makes,
The optical fiber connection device according to claim 17.

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