JPH0886937A - Optical connector - Google Patents

Abstract

PURPOSE: To provide such an optical connector that chipping or abnormal wear in positioning pins and positioning holes corresponding to the pins, and chipping or abnormal wear in tips of ferrules and plugs due to repetition of attaching and detaching of the optical connector can be suppressed. CONSTITUTION: This optical connector consists of a ferrule 57 integrally connected with an optical fiber 58, a housing 60 which holds the ferrule 57 to freely slide so that the tip of the ferrule 57 projects, a ferrule stopping means to prevent disengaging of the ferrule 57 from the tip of the housing 60, and a repulsing force producing means 67 to produce repulsive force to press back the ferrule 57 when the ferrule 57 moves to the base side of the housing 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector for connecting a pair of optical fibers to each other.

[0002]

2. Description of the Related Art FC type connectors for single-core wires and S
A C-type connector or an MF-type connector mainly for multi-core wires is an optical connector for connecting a pair of optical fibers or a group of optical fibers to each other.
This is well known in Japanese Laid-Open Patent Publication No. 606, JP-A-4-347806, etc., and these all have a structure in which housings are connected to each other via an adapter on the assumption that they are frequently attached and detached.

As shown in FIG. 10 showing the disassembled state of the appearance of such a conventional MF type connector, a housing 101 detachably attached to an adapter (not shown) is integrally provided with a tip portion of a receiving frame 102. Are linked together.
The receiving frame 102 and the pressing frame 103 that is superposed on the receiving frame 102 are integrated by a pair of clippers 104 having a groove-shaped cross section and a rubber boot 105. The tip portion of the optical cable 106 has the receiving frame 10
It is in a state of being held by 2 and the pressing frame 103,
An optical fiber 107 extending in an exposed state from the tip of the optical cable 106 is connected to a ferrule 108,
The connection end face of the ferrule 108 faces the front end face of the ferrule 108. The ferrule 108 slidably fitted between the housing 101 and the receiving frame 102 is slidably penetrated by a pair of positioning pins 109 whose distal end projects from the distal end surface of the ferrule 108. The base end portion of the pin 109 is a pin holder 110 slidably held by the housing 101 and the receiving frame 102.
Is integrally fitted to. The pin holder 110 and the ferrule 108 include the housing 101 and the receiving frame 1.
02 is pressed by the spring force of the compression spring 111 housed between the positioning pin 109 and the front end of the housing 101 to project from the front end surface of the ferrule 108. The other optical connector, not shown, which is detachably attached to the adapter, is tightly fitted into a pair of positioning holes opened in the tip surface of the ferrule.

That is, a pair of positioning pins 109 projecting from the front end surface of the ferrule 108 of one optical connector are fitted into a pair of positioning holes opened in the front end surface of the ferrule of the other optical connector held by the adapter. The tip end surfaces of the ferrules 108 of the pair of optical connectors are pressed against each other by the spring force of the compression spring 111, so that the connection end surfaces of the optical fiber 107 are accurately opposed to each other.

[0005]

In the conventional optical connector shown in FIG. 10, since the ferrule 108 is always biased by the compression spring 111 with respect to the housing 101, the housing 101 is connected when the optical connector is connected.
When a component force in the direction perpendicular to the sliding direction of the ferrule 108 acts on the ferrule 108, the tip of the positioning pin 109 and the positioning hole formed in the ferrule of the other optical connector into which the positioning pin 109 is inserted are formed. There has been a problem that the opening end portion is damaged, or local wear occurs in these portions with repeated use.

The same problem occurs not only in the MF type connector described above, but also in the SC type connector which does not use the positioning pin or the corresponding positioning hole. In other words, even in this SC type connector, the ferrule is always urged by the compression spring with respect to the housing. Therefore, when the ferrule of one optical connector and the plug of the other optical connector are fitted to each other, the ferrule with respect to the housing is fitted. When a component force in the direction perpendicular to the sliding direction of the ferrule or plug acts on the ferrule and plug, the ferrule and plug tips may be damaged, or local wear may occur on these parts with repeated use. Of.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to suppress the damage and abnormal wear of the positioning pin and the corresponding positioning hole and the damage and abnormal wear of the tip of the ferrule and the plug when the optical connector is attached and detached. It is to provide an optical connector to be obtained.

[0008]

According to a first aspect of an optical connector of the present invention, a ferrule integrally connected with an optical fiber and a ferrule slidable so that a tip portion of the ferrule can project. A housing that holds the ferrule, a ferrule retaining means that prevents the ferrule from coming off from the tip of the housing, and a reaction force that pushes back the ferrule from the middle of the ferrule along with the movement of the ferrule toward the base end side of the housing. And a reaction force generating means for generating.

Here, the ferrule retaining means is
The ferrule includes a flange portion formed on the housing, and an engaging portion formed on the housing for engaging with the flange portion of the ferrule. The ferrule is provided between the engaging portion and the reaction force generating means. It can be in a fitted state.

Further, the reaction force generating means is held slidably with respect to the housing in a direction parallel to the sliding direction of the ferrule, and the ferrule receiver with which the ferrule can abut, and the ferrule receiver. A biasing means for biasing the tip side of the housing and a ferrule receiving regulation means for regulating the projecting position of the ferrule receptacle toward the tip side of the housing by the biasing means may be provided.

On the other hand, a second aspect of the optical connector according to the present invention is an optical connector which is connected to an optical connector having a positioning hole through a positioning pin fitted in the positioning hole. A ferrule in which fibers are integrally connected, a housing that slidably holds the ferrule so that the tip of the ferrule can project, and a ferrule retainer that prevents the ferrule from coming off from the tip of the housing. Means, a ferrule receiver slidably held with respect to the housing in a direction parallel to the sliding direction of the ferrule, and with which the ferrule can abut, and the ferrule receiver is urged toward the distal end side of the housing. A biasing means and a flap for restricting a projecting position of the ferrule receiver toward the tip side of the housing by the biasing means. It is provided with a rule receiving regulation means and a positioning pin which is integrally provided on the distal end portion of the ferrule receiver so as to project integrally and slidably penetrates through the ferrule so that the distal end portion projects from the distal end surface of the ferrule. It is what

Here, the ferrule retaining means is
The ferrule was provided with a flange portion, and a locking portion formed on the housing for locking the flange portion of the ferrule, and the ferrule was loosely fitted between the locking portion and the ferrule receiver. It can be in a state.

Further, a tapered truncated cone-shaped locking portion is formed at the base end of the ferrule receiver, the ferrule receiver is slidably held in the housing, and the engagement is performed after the locking portion is press-fitted. It is also effective to form a locking hole for locking the stopper, and the positioning pin may be integrally projected at the tip of the ferrule receiver through the pin gripping means.

In the present invention, a pair of optical connectors may be connected via an adapter, and the housing may be detachably attached to the adapter.

[0015]

According to the present invention, when the pair of optical connectors are not connected, the ferrule is loosely fitted in the housing, and when the pair of optical connectors are connected to each other in this state, the ferrules are displaced from each other. The ferrule can escape into the housing without any resistance, and wear or loss of the ferrule, the plug, the positioning pin, the positioning hole, or the like can be suppressed.

Further, if the connection work of the pair of optical connectors is continued from this state, the positional displacement of the optical connector is corrected by the play between the housing and the ferrule, and the ferrule is generated by the reaction force generating means during the movement. A reaction force for pushing back is generated, and the ferrules of the pair of optical connectors are brought into contact with each other to be connected.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the optical connector according to the present invention is applied to an MF type connector using an adapter is shown in FIGS.
This will be described in detail with reference to FIG.

As shown in FIG. 1 showing the disassembled state of the present embodiment, FIG. 2 showing the fractured structure thereof, and FIGS. 3 and 4 showing the III-III arrow sectional structure and IV-IV arrow sectional structure thereof, respectively. A detachable operation tube 13 that surrounds the housing 12 is slidably fitted to the housing 12 that is detachably attached to the adapter 11. Further, on the upper and lower sides (upper and lower sides in FIG. 4) of the housing 12, there are formed protrusions 15 that can be engaged with the retaining portions 14 that are respectively protruded above and below the inner wall of the attachment / detachment operation cylinder 13, On the other hand, the attachment / detachment operation cylinder 13 is designed so as not to come off to the adapter 11 side. These housing 12 and attachment / detachment operation tube 1
A pair of left and right (upper and lower in FIG. 2) compression coil springs 16 that bias the locking portion 14 of the attachment / detachment operation cylinder 13 against the protrusion 15 of the housing 12 are incorporated between the two.

In this embodiment, the detachable operating cylinder 13 is press-fitted from the front end of the housing 12 with the compression coil springs 16 incorporated therein, and the elastic deformation of the housing 12 and the detachable operating cylinder 13 is utilized to make the housing 12 The housing 12 and the attachment / detachment operation cylinder 13 are unitized by allowing the locking portion 14 of the attachment / detachment operation tube 13 to pass over the protrusion 15 of the above.

On both left and right sides of the housing 12, there are formed locking window portions 19 which can be respectively locked by a pair of locking portions 18 projecting from both ends of the receiving frame 17. The locking portion 18 of the receiving frame 17 is locked to the locking window portion 19 of the housing 12, so that the housing 12 and the tip of the receiving frame 17 are integrally connected. The receiving frame 17 and the pressing frame 20 superposed on the rear portion of the receiving frame 17 are a pair of clippers 21 having a groove-shaped cross section.
And rubber boots 22 that surround them and are integrated. The tip portion of the optical cable 23 is held by the receiving frame 17 and the pressing frame 20. Also,
The tension member 24 pulled out from the tip of the optical cable 23 is guided to a groove-shaped grip 25 formed in the rear portion of the receiving frame 17, and is held between the receiving frame 17 and the pressing frame 20 by a gripping projection 26 formed on the pressing frame 20. Sandwiched between.

A multi-core optical fiber 27 extending in an exposed state from the tip of the optical cable 23 is a ferrule 28 slidably fitted between the housing 12 and the receiving frame 17.
And the connection end faces thereof face the front end face 29 of the ferrule 28. The front end surface 29 of the ferrule 28 in the present embodiment is inclined at a predetermined angle θ, for example, about 8 degrees with respect to the surface perpendicular to the longitudinal direction of the optical connector, that is, the surface perpendicular to the optical axis of the optical fiber 27,
This reduces reflected return light.

A flange for slidably holding spring receiving flanges 32 of a pair of left and right ferrule receivers 31 each having a frustoconical locking portion 30 formed at the rear end on the left and right of the front portion of the receiving frame 17. Guide holes 33 are formed, and the ferrule receiver 3 is provided at the rear end of the flange guide holes 33.
A small-diameter locking hole 34 capable of locking the first locking portion 30 is connected. A compression coil spring 35 that urges the ferrule receiver 31 toward the ferrule 28 is incorporated in the ferrule receiver 31 between the locking hole 34 and the spring receiving flange 32. The locking portion 30 of the ferrule receiver 31 comes into contact with the locking hole 34.

In this embodiment, the locking portion 31 of the ferrule receiver 31 is press-fitted into the locking hole 34 of the receiving frame 17, and the locking hole 34 and the locking portion 31 are elastically deformed to lock. The locking portion 31 is passed through the hole 34 so that the ferrule receiver 31 does not come off from the locking hole 34.

At the rear end of the ferrule 28, a rectangular annular locking portion 36 formed on the inner wall of the housing 12.
The ferrule 28 to the housing 1
A rectangular flange portion 37 is formed so as not to come off from the tip of the ferrule 28, and the ferrule 28 is loosely fitted between the locking portion 36 and the tip of the ferrule receiver 31 with the bending of the optical fiber 27. It is in the state of being That is, the thickness of the flange portion 37 of the ferrule 28 (in FIG. 2,
The length between the locking portion 36 of the housing 12 and the tip of the ferrule receiver 31 when the locking portion 30 is in contact with the locking hole 34 is longer than a predetermined length, for example, about 5 mm. It is set. Also, this ferrule 2
A pair of positioning pins 38, the tip portions of which project from the tip surface of the ferrule 28, slidably pass through 8, and the base ends of these positioning pins 38 are slidably held with respect to the receiving frame 17. The pin holding means of the present invention is configured by being fitted into the end portion of the ferrule receiver 31 thus formed and caulking integrally. A tapered taper portion 39 is formed at the tip of each of the positioning pins 38, and the adapter 11
As shown in FIG. 5, which is detachably attached to the positioning hole 40, even if a positional deviation of the other optical connector with respect to the positioning hole 40 occurs, this positional deviation can be easily corrected.

As described above, in this embodiment, since the base end portion of the positioning pin 38 is fitted to the tip end portion of the ferrule receiver 31 and they are integrally caulked, a special component is prepared as the pin gripping means. No need. Also, ferrule 2
The tip end portions of the positioning pins 38 protruding from the tip end surface of 8 are the tip end surfaces 29 of the ferrule 28 of the other optical connector.
It is adapted to be tightly fitted in a pair of positioning holes 40 which are open to the outside. In the other optical connector, the ferrule receiver 31 is not provided with a positioning pin, and other than this, FIG.
Since it has the completely same structure as the optical connector shown in FIG. 4, the members having the same function are denoted by the same reference numerals, and the description thereof will be omitted.

The connection end face of the optical fiber 27, which faces the front end face 29 of the ferrule 28, is arranged at a predetermined interval in the arrangement direction of the positioning pins 38, that is, in the vertical direction in FIG.

Therefore, when the tip portions of the housings 12 of the pair of optical connectors are inserted into the adapter 11, the tip portions of the pair of positioning pins 38 projecting from the tip surfaces 29 of the ferrules 28 of one of the optical connectors become the other. The ferrule 28 of the optical connector is fitted into a pair of positioning holes 40 that are opened in the front end surface 29 of the ferrule 28.
The ferrules 28 are retracted to the side of the ferrule receivers 31 along with the bending deformation of the optical fiber 27 by the amount of play of
The tapered portion 39 causes the positioning pin 38 to move into the positioning hole 4
As a result of being guided to 0, these positions will match exactly.
Therefore, the tip of the positioning pin 38 and the positioning hole 40
It is possible to prevent accidents such as a loss of the tip of the blade or abnormal wear. Further, when the housing 12 is inserted into the adapter 11 to a regular position, the ferrule 28 pushes against the tip of the ferrule receiver 31 during its movement, and thereafter, the ferrule 28 resists the spring force of the compression coil spring 35. Are pushed toward the receiving frame 17, the tip surfaces of the ferrules 28 of the pair of optical connectors are pressed against each other, and the connection end surfaces of the optical fibers 27 are accurately opposed to each other.

Although the MF type connector having the structure for connecting the pair of optical connectors by using the adapter 11 has been described in the above-mentioned embodiment, the structure of connecting the pair of optical connectors by using the clip made of sheet metal is described. The present invention can be applied to a thing.

Next, an embodiment in which the optical connector according to the present invention is applied to an SC type connector will be described in detail with reference to FIG. 6 showing its broken structure.

That is, the optical fiber 44 in the optical cable 43 is connected to the ferrule 42 having the flange portion 41 formed in the central portion, and the connecting end face thereof faces the tip face 45 of the ferrule 42. The ferrule 42, the tip of which is tightly fitted to the plug of the other optical connector (not shown), includes the housing 4 surrounded by the attachment / detachment operation tube 46.
7 is slidably fitted to the housing 47, and the housing 47 is abutted against the flange 41 on the inner periphery of the housing 47.
A locking portion 48 is provided so as to prevent the ferrule 42 from coming off from the tip of 7. An engaging protrusion 51 is formed on an annular spring receiver 50 that slidably holds the rear end of the ferrule 42 and abuts on the rubber boot 49. The engaging protrusion 51 locks the spring receiver 50. An engagement window portion 52 for holding is formed at the rear end portion of the housing 47. A step portion 53 is formed on the inner circumference of the housing 47 between the engagement window portion 52 and the locking portion 48, and an annular ferrule capable of sliding between the step portion 53 and the spring receiver 50. The receiver 54 is fitted on the inner circumference of the housing 47.
A compression coil spring 55 for urging the ferrule receiver 54 toward the step portion 53 is incorporated between the ferrule receiver 54 and the spring receiver 50.

The thickness of the flange portion 41 of the ferrule 42 (width dimension in the left-right direction in the drawing) is set to be thinner than the distance between the engaging portion 48 and the step portion 53 along the left-right direction in the drawing. As a result, the ferrule 42 can freely slide in the housing 47 with the bending of the optical fiber 44 until the flange 41 of the ferrule 42 contacts the ferrule receiver 54. That is, the ferrule 42 is in a state of being loosely fitted in the housing 47 by a predetermined amount.
Further, a tapered taper portion 56 is formed at the tip of the ferrule 42 so that even if a positional deviation of the other optical connector (not shown) with respect to the plug occurs, this positional deviation can be easily corrected. .

Therefore, the ferrule 4 of one optical connector
2 and the plug of the other optical connector (not shown) are fitted to each other, and if these positions are slightly deviated from each other, the ferrule 42 is moved to the housing 47 by an amount corresponding to the play of the ferrule 42 with respect to the housing 47. As the ferrule 42 is retracted to the ferrule receiver 54 side with the bending deformation and the ferrule 42 is guided into the plug of the other optical connector by the taper portion 56, these positions are accurately matched. Therefore, it is possible to prevent accidents such as the tip portion of the ferrule 42 or the tip portion of the plug being damaged or abnormally worn. Further, when the pair of optical connectors are abutted against each other to a regular position, the ferrule 42 presses against the tip surface of the ferrule receiver 54 during its movement, and thereafter, the ferrule 42 resists the spring force of the compression coil spring 55. The ferrule 42 is pushed toward the rubber boot 49 side, the front end surfaces of the ferrules 42 of the pair of optical connectors are pressed against each other, and the connection end surfaces of the optical fibers 44 are accurately opposed to each other.

In the above-mentioned two embodiments, the ferrule receivers 31 and 54 are slidably incorporated in the housings 12 and 47, respectively.
It is possible to obtain the same effect as that of the above-described embodiment without providing 54 at all.

FIG. 7 showing a schematic sectional structure of another embodiment of the optical connector according to the present invention and FIGS. 8A and 8B showing the left side surface thereof broken away, and a sectional structure taken along line IX-IX in FIG. As shown in FIG. 9, an optical fiber 58 is connected to the rear end of the ferrule 57 whose front and rear ends are cylindrical.
The connection end face of the ferrule 57 faces the tip face 59 of the ferrule 57. A circular spring accommodating portion 61, in which the rear portion of the ferrule 57 is located, is formed at the rear portion of a housing 60 that slidably holds the ferrule 57, and an optical fiber 58 drawn from the rear end of the ferrule 57.
Is a fiber through hole 6 formed at the rear end of the housing 60.
2 is led out of the housing 60. A ferrule 57 is formed in the front part of the housing 60 so as to surround the front part of the ferrule 57.
The front end of the housing can project from the front end of the housing 60.

At the center of the ferrule 57, a pair of arcuate flange portions 64 are integrally projected at 180 degrees apart, and a flange holding portion 65 having a shape corresponding to the flange portions 64 is provided in the housing. 60 spring storage 61
And the ferrule conduction hole 63. Length of this flange holding portion 65 (length in the left-right direction in FIG. 7)
Is set to be longer than the thickness of the flange portion 64 of the ferrule 57.
By the pair of flat portions 66, the flat holding portions 65 are slidably held by the flange holding portion 65. At the front end of the flange holding portion 65, the flange portion 64 of the ferrule 57 is provided.
The ferrule 57 does not come off from the front end of the housing 60. The compression coil spring 67 is accommodated in the spring accommodating portion 61, and when the rear end of the flange portion 64 of the ferrule 57 is pushed into the spring accommodating portion 61, the spring force of the compression coil spring 67 is opposed to the ferrule 57. It acts as a force.

Therefore, the ferrule 5 of one optical connector
7 and the plug of the other optical connector (not shown) are fitted to each other, and if these positions are deviated from each other, the ferrule 57 corresponding to the amount of the play of the ferrule 57 with respect to the housing 60, as in the previous embodiment. With the bending deformation of the optical fiber 58, each retracts to the spring storage portion 61 side,
The tapered portion 68 formed at the tip of the ferrule 57 guides the ferrule 57 into the plug of the other optical connector, and as a result, these positions are accurately matched. Therefore, it is possible to prevent accidents such as the tip portion of the ferrule 57 and the tip portion of the plug being damaged or abnormally worn. Further, when the pair of optical connectors are butted against each other to the proper position, the ferrule 57 pushes against the tip of the compression coil spring 67 during its movement, and thereafter, resists the spring force of the compression coil spring 67. The ferrule 57 is pushed toward the spring accommodating portion 61, the tip faces 59 of the ferrules 57 of the pair of optical connectors are pressed against each other, and the connection end faces of the optical fibers 58 are accurately opposed to each other.

[0037]

According to the optical connector of the present invention, the ferrule retaining means for preventing the ferrule from coming off from the tip of the housing and the ferrule from the middle of the ferrule along with the movement of the ferrule to the base end side of the housing. By providing a reaction force generating means for generating a reaction force to push back, and in a state where the optical connector is not coupled, the ferrule is loosely fitted in the housing so that the ferrule can be attached even if an excessive force is applied to the ferrule. It is possible to evacuate with almost no resistance, and it is possible to suppress accidents such as abnormal wear or loss of the mating portion during the attaching / detaching operation of the optical connector.

[Brief description of drawings]

FIG. 1 is a perspective view showing, in an exploded state, an embodiment in which an optical connector according to the present invention is applied to an MF type connector.

FIG. 2 is a sectional view in which a main part of the embodiment shown in FIG. 1 is cut away.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

5 is a sectional view showing a schematic structure of a main part of the other optical connector corresponding to the optical connectors of FIGS. 1 to 4 in a broken state.

FIG. 6 is a sectional view showing a main part of an embodiment in which the optical connector according to the present invention is applied to an SC connector.

FIG. 7 is a sectional view showing a schematic structure of another embodiment of the optical connector according to the present invention.

FIG. 8 is a left side view of FIG.

9 is a sectional view taken along the line IX-IX in FIG.

FIG. 10 is a perspective view showing a schematic structure of a conventional MF type connector in an exploded state.

[Explanation of symbols]

 11 Adapter 12 Housing 13 Attachment / Detachment Operation Tube 14 Locking Part 15 Projection 16 Compression Coil Spring 17 Receiving Frame 18 Locking Part 19 Locking Window 20 Pressing Frame 21 Clipper 22 Rubber Boot 23 Optical Cable 24 Tension Member 25 Grasping 26 Gripping Protrusion 27 Optical fiber 28 Ferrule 29 Tip surface 30 Locking part 31 Ferrule receiving 32 Spring receiving flange 33 Flange guide hole 34 Locking hole 35 Compression coil spring 36 Locking part 37 Flange part 38 Positioning pin 39 Taper part 40 Positioning hole 41 Flange part 42 ferrule 43 optical cable 44 optical fiber 45 front end surface 46 attachment / detachment operation cylinder 47 housing 48 locking part 49 rubber boot 50 spring receiver 51 engaging protrusion 52 engaging window part 53 step 54 ferrule receiver 55 compression coil spring 56 tape Par part 57 Ferrule 58 Optical fiber 59 Tip surface 60 Housing 61 Spring accommodation part 62 Fiber through hole 63 Ferrule through hole 64 Flange part 65 Flange holding part 66 Flat part 67 Compression coil spring 68 Tapered part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Nagasawa 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (8)

[Claims] 1. A ferrule to which optical fibers are integrally connected, a housing that slidably holds the ferrule so that the tip of the ferrule can project, and the ferrule is detached from the tip of the housing. And a reaction force generation unit that generates a reaction force that pushes back the ferrule from the middle of the ferrule along with the movement of the ferrule toward the base end side of the housing. Optical connector. 2. The ferrule detachment preventing means comprises a flange portion formed on the ferrule, and an engaging portion formed on the housing and engaged with the flange portion of the ferrule.
The optical connector according to claim 1, wherein the ferrule is loosely fitted between the locking portion and the reaction force generating means. 3. A ferrule receiver, wherein the reaction force generating means is slidably held with respect to the housing in a direction parallel to the sliding direction of the ferrule, and the ferrule can abut, and the ferrule receiver of the housing. 2. A urging means for urging the tip end side, and a ferrule receiving regulation means for regulating a projecting position of the ferrule receiver to the tip end side of the housing by the urging means. The optical connector described in Item 2. 4. An optical connector, which is connected to an optical connector having a positioning hole through a positioning pin fitted into the positioning hole, wherein a ferrule in which an optical fiber is integrally connected, A housing that slidably holds the ferrule so that the tip of the ferrule can project, a ferrule retaining means that prevents the ferrule from coming off from the tip of the housing, and a ferrule that is parallel to the sliding direction of the ferrule. A ferrule receiver slidably held with respect to the housing and capable of abutting the ferrule, a biasing means for biasing the ferrule receiver toward the distal end side of the housing, and the housing by the biasing means Ferrule receiving restricting means for restricting the protruding position of the ferrule receiver toward the tip side of the ferrule, and the ferrule Only the tip portion integrally projecting from the, and an optical connector, characterized in that it comprises a positioning pin tip through said ferrule slidably protrudes from the distal end surface of the ferrule. 5. The ferrule retaining means comprises a flange portion formed on the ferrule, and an engaging portion formed on the housing and engaged with the flange portion of the ferrule.
The ferrule is in a state of being loosely fitted between the locking portion and the ferrule receiver.
Optical connector described in. 6. A tapered frustoconical locking part is formed at the base end of the ferrule receiver, and the ferrule receiver is slidably held in the housing, and after the locking part is press-fitted, this engagement is performed. The optical connector according to claim 4 or 5, wherein a locking hole for locking the stopper is formed. 7. The positioning pin is integrally projectingly provided on the front end portion of the ferrule receiver via a gripping means.
Optical connector described in. 8. A pair of optical connectors are connected via an adapter, and a housing is detachably attached to the adapter. The optical connector according to claim 4, claim 5, claim 6, or claim 7.