JPH08146251A - Optical connector - Google Patents

Abstract

PURPOSE: To provide a structure exchangeable in the kinds of optical connectors and to suppress a reflection attenuation quantity to a lower level even if an optical plug is connected thereto. CONSTITUTION: The optical plug 4 is connected to a cylindrical juncture 7 of a shell member 1 and a stepped cylindrical part 6 on a opposite side is inserted into a stepped aperture 22 of a shell member 2 until the end faces of flanges 5, 21 come into contact with each other. A ferrule 27 of the optical plug 4 and a ferrule 25 of the shell member 2 are aligned and held in an aligning sleeve 11 in the state that the end faces polished to a projecting surface are held in contact with each other, by which reflected light is substantially eliminated. The other end of the ferrule 25 is polished diagonally and the reflected light from the part hardly returns to the optical plug 4 side. Both shell members 1 and 2 are locked by the engaging part of a locking lever 31 which is engaged with a receiving part for engagement of the shell member 2. At this time, an elastic member 36 passes over a projecting part 37 for engagement and the free movement on the circular locus of the locking lever 31 is limited. The surface 25b polished to a projecting surface of the ferrule 25 is exposed in the disconnecting state of the connecting of both shell members 1 and 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector which can be replaced or cleaned of a ferrule and has a high return loss, and in particular, an optical connector suitable as an optical receptacle to which an optical connector plug is detachably connected to only one side. It is about.

[0002]

2. Description of the Related Art In recent years, particularly in an optical transmission system for handling analog signals such as CATV, distortion is increased when an LD (laser diode) has a reflected return light, and therefore, there is a demand for a return loss of optical components. It's getting tougher. Also,
The optical output is increasing due to the development of the optical fiber amplifier (EDFA), and it is dangerous for the light emitted from the optical fiber to directly enter the eye. Therefore, if the end face of the optical fiber is in contact with air, the optical output unit A structure is adopted in which the shutter operates to suppress the light output level.

Specifically, as shown in FIG. 7, a light source 51
An optical fiber amplifier 52, a shutter 53, a fiber coupler 54, and an optical connector 55 are arranged in this order from the output side of the light source 51 on the optical axis of, and a monitor 57 for receiving the reflected light from the optical fiber 56 is provided in the fiber coupler 54. The optical output unit 58 is configured by connecting them to each other, and after the light from the light source 51 is amplified by the optical fiber amplifier 52, it passes through the shutter 53 and the fiber coupler 54 which are in the open state, and the optical fiber 5
It is incident on 6.

Here, in order to measure the power of the light emitted from the optical fiber 56, the optical connector plug 59a of the optical connector 59 connecting the optical fibers 56 is removed and connected to the optical power meter 60. And the optical connector plug 5
When the tip of 9a is in contact with air, Fresnel reflection (about 4%) occurs at the end face of the optical fiber 56 at the end face of the optical connector plug 59a and the air. When this Fresnel reflection is detected by the monitor 57, The shutter 53 is automatically switched to the closed state, and the incident power of light on the optical fiber 56 is reduced. Then, when it is connected to the optical power meter 60, the return loss becomes equal to or more than the specified value, and the shutter 53 is opened again.

By the way, in order to reduce the return loss of an optical connector, the ferrule end surface is convexly polished (PC
By polishing), the return loss is 30 dB in the system of optical connector plug-optical adapter-optical connector plug.
Although the above has been realized, it was difficult to suppress the reflection in the air layer in the optical connector plug-optical receptacle system.

An optical adapter in which the type of optical connector can be easily replaced and the end face of the ferrule can be cleaned is shown in FIGS. 8 and 9, for example, Japanese Patent Application No. 3-11.
No. 7830 has been filed.

This optical adapter will be described in brief. It is composed of a first shell member 71 and a second shell member 72 which are fastened to each other so that they can be coupled and separated from each other, and an alignment sleeve 73 is held inside. The lock lever 7 that locks the connection between the first shell member 71 and the second shell member 72 in the state of being connected to the second shell member 72.
4 are provided. In this optical adapter, with the lock lever 74 locking the connection between the shell members 71 and 72, the end faces of the ferrules 75 and 76 are abutted against each other in the alignment sleeve 73. Optical connector plugs 77 and 78 are detachably connected to both sides. Further, when the second shell member 72 is separated from the first shell member 71, the ferrule 7
The end face of No. 5 is exposed so that the end face can be cleaned.

[0008]

By the way, in the above-mentioned structure, the amount of reflected light of the connecting portion can be suppressed by polishing the end faces of the ferrules 75 and 76 with each other by PC, but this is only on both sides. ，
It is possible because it is an optical adapter to which 78 is connected.
It was not possible to remove Fresnel reflection for an optical receptacle in which the optical connector plug was connected to only one side and the other side was released.

For example, in a photodetector of an optical power meter for measuring the state of light of an optical fiber, as shown in FIG. 10, the light emitted from the optical fiber is received by a PD (photodiode) 81, so that the light is always input to the input section. The receptacle 82 will be used. Therefore, in the measurement system of FIG. 7 described above,
In order to measure the optical power in the optical fiber 56, Fresnel reflection is inevitably generated, and highly accurate measurement cannot be performed, and development of an optical receptacle in which Fresnel reflection does not occur has been desired. Further, in order to support various optical connectors used by users, it is required that the types of optical connectors can be easily exchanged.

As described above, conventionally, there is an optical adapter in which the type of the optical connector can be exchanged, but when it is applied to an optical receptacle, Fresnel reflection occurs at the end face of the fiber and the problem due to reflected return light can be solved. There wasn't.

Further, in the measuring system using the optical fiber amplifier 52 shown in FIG. 7, if Fresnel reflection occurs when the optical connector plug is connected to the optical power meter, the optical output cannot be accurately measured. It was

Therefore, the present invention has been made in view of the above problems, and an object thereof is to have a structure in which the types of optical connectors can be exchanged and the return loss even when an optical connector plug is connected. An object of the present invention is to provide an optical connector capable of keeping the power consumption low.

[0013]

In order to achieve the above object, the optical connector of claim 1 according to the present invention is an optical connector for connecting an optical connector plug fiber-connected to one optical circuit to another optical circuit. The connector has connecting portions 6 and 7 on both sides, and the optical connector plug 4 is provided on one connecting portion 7.
And a first shell member 1 to which the
Second shell member 2 having a connecting portion 22 on one side to which the other connecting portion 6 of the shell member is detachably connected, and the other connecting portion of the first shell member and the second shell member. Fastening means 31, 3 for locking the connection state between the parts
5, and one end 25b that contacts the ferrule end surface 27a of the optical connector plug is polished into a convex shape or a convex spherical shape,
The other end 25c is obliquely polished, and the ferrule provided on the second shell member so that the one end polished to the convex shape or the convex spherical shape is exposed to the connecting portion side of the second shell member. 25 and an alignment sleeve 11 provided on the first shell member so as to hold the ferrule.

In the optical connector of claim 2, the biasing member is slidably held with respect to the second shell member and biases the ferrule in a direction of pressing the ferrule end surface of the optical connector plug. It is equipped with 43. Further, in the optical connector of the third aspect, the rotation preventing members 44 and 45 for inhibiting movement of the ferrule with respect to the second shell member in the rotation direction are provided.

[0015]

The optical connector plug 4 is connected to one connecting portion 7 of the first shell member 1, and the connecting portion 22 of the second shell member 2 is connected to the other connecting portion 6. The connection state between the connecting portions 6 and 22 of the shell members 1 and 2 is locked by the fastening means 31 and 35. The ferrule 27a of the optical connector plug 4 connected to the first shell member 1 and the ferrule 25 in the second shell member 2 are aligned with their end faces polished into a convex shape or a convex spherical shape in contact with each other. It is aligned and held by the sleeve 11. This eliminates Fresnel reflected light. Generally, a return loss of 30 dB or more can be obtained. At that time, since the other end 25c of the ferrule 25 on the second shell member 2 side is obliquely polished, the reflected light from this portion hardly returns to the optical connector plug 4 side. Generally, a return loss of 60 dB or more can be obtained. Ferrule 25 provided on the second shell member 2
In the state where the connection between the shell members 1 and 2 is released, the surface polished into a convex shape or a convex spherical shape is exposed on the connection portion 22 side. In this state, the end face 2 of the ferrule 25
5b is cleaned. When the optical connector plug 4 is connected to the first shell member 1, the position of the end face of the ferrule 27a of the optical connector plug 4 is slightly different depending on the type of the optical connector, but the ferrule 25 is urged by the biasing member 43. It is slidably held with respect to the shell member 2 and is always biased toward the first shell member 1 side. As a result, the ferrules 25 and 27a are brought into contact with each other by a stable contact pressure. The detent members 44 and 45 inhibit rotation of the ferrule 25 inside the second shell member 2. As a result, the light emitted from the other end of the fiber is always guided in a constant direction, for example, the direction of the light condensing surface of the PD in the photodetector.

[0016]

1 is a perspective view showing an optical connector according to a first embodiment of the present invention, in which the optical connector is disassembled, and FIG.
FIG. 4 is a perspective view showing a state in which the optical connector is coupled, FIG. 3 is a sectional view in the coupled state of the optical connector, and FIG. 4 is a sectional view showing a state in which an optical connector plug is connected to the optical connector.

A first embodiment of the optical connector according to the present invention will be described below with reference to FIGS.

Referring to FIGS. 1 and 4, the optical connector according to the first embodiment is fastened to a first shell member (front shell) 1 and the first shell member 1 so as to be connectable and separable. It has the 2nd shell member (rear shell) 2. The second shell member 2 is attached to the panel 3 of the device. An optical connector plug 4 is detachably connected to the first shell member 1 on the outside of the panel 3 of the device with the panel 3 of the device as a reference.

The first shell member 1 has a quadrangular first flange 5 in a substantially central portion thereof. On the side of the first flange 5 that faces the second shell member 2, a cylindrical stepped cylindrical portion 6 as a connecting portion composed of a large diameter portion 6a and a small diameter portion 6b is integrally formed. A cylindrical connecting portion 7 as a connecting portion having a threaded portion 7a formed on the surface is integrally formed on the surface opposite to the stepped cylindrical portion 6 on the opposite side of the first flange 5. The optical connector plug 4 is detachably connected to the tubular connecting portion 7.

A mounting hole 8 is formed in the center of the first shell member 1 so as to penetrate therethrough in the axial direction. This mounting hole 8
Between the tubular connecting portion 7 and the first flange 5, and the stepped tubular portion 6
Steps 9 and 10 are formed in the large-diameter portion 6a, respectively, and the diameter of the hole decreases from the tubular connecting portion 7 toward the stepped tubular portion 6. An alignment sleeve 11 is provided by being inserted into the mounting hole 8. Further, a screw portion 12 is formed in a portion of the mounting hole 8 located on the first flange 5. A holding member 13 for holding the alignment sleeve 11 inside the first shell member 1 is detachably attached to the screw portion 12. A collar 13a is integrally formed in the center of the holding member 13, and a screw 13 is formed on the outer periphery of the tip.
b is formed. This holding member 13 has a screw portion 12,
When the spaces 13b are screwed together, one end of the alignment sleeve 11 abuts on the inner wall end surface 6c of the stepped tubular portion 6, and the other end of the alignment sleeve 11 abuts on the step portion 9 while the other end of the alignment sleeve 11 abuts on the inner wall. It is held in contact with the end surface 13c. Thus, when the first shell member 1 is joined to the second shell member 2, the alignment sleeve 11 has an outer peripheral surface axially covered by the holding member 13 inside the first shell member 1. Retained.

The second shell member 2 is the first shell member 1.
The second flange 21 having the same shape as the first flange 5 is provided on the side facing the. The second flange 21 is formed with a stepped opening portion 22 as a connecting portion matching the shape of the stepped tubular portion 6 in which the stepped tubular portion 6 of the first shell member 1 is accommodated. Further, on the surface opposite to the second flange 21 facing the stepped opening 22, the cylindrical portion 23 is coaxial with the stepped cylindrical portion 6.
Are integrally formed. The cylindrical portion 23 has a stepped opening 2
A through hole 24 communicating with 2 is formed. The through hole 24 is formed to have substantially the same diameter as the inner diameters of the mounting hole 8 and the alignment sleeve 11 in the stepped tubular portion 6. A ferrule 25 is adhered and fixed to the through hole 24 at a circumferential portion 25a thereof, and the tip end portion is aligned and held inside the alignment sleeve 11.

The ferrule 25 has one end surface 25b on the side of the aligning sleeve 11 polished into a convex shape or a convex spherical shape, and is exposed from the stepped opening 22 side of the second shell member 2. Further, the other end surface 25c of the ferrule 25 is polished with an angle with respect to the optical axis to be polished to the end surface 21a of the second flange 21.
More part of it is protruding. A fiber 26 for guiding light is housed in the center of the ferrule 25, and the end face of the fiber 26 is the end face 2 of the ferrule 25.
5b and 25c are simultaneously polished.

In the optical connector of the present embodiment, as shown in FIG. 3, in the inside of the first shell member 1, one end side of the alignment sleeve 11 is axially extended on the side opposite to the holding member 13. The other end of the aligning sleeve 11 is held by the holding member 13 in a state where it is inserted up to the mounting hole 8 located in the tubular portion 6. Further, the second shell member 2 is fixed by fastening the second flange 21 to a predetermined position of the panel 3 with a screw (not shown). In the second shell member 2 fixed to the panel 3, the end surface 21 a of the second flange 21 which is orthogonal to the axial direction so as to cover the stepped tubular portion 6 is butted against the end surface 5 a of the first flange 5. First shell member 1
Connected to Then, as shown in FIG. 4, one end surface 25b of the ferrule 25 is abutted against the end surface 27a of the ferrule 27 of the optical connector plug 4 in the alignment sleeve 11 for optical connection.

The optical connector plug 4 connected to the first shell member 1 has an end face 27a of the ferrule 27.
Is polished into a convex shape or a convex spherical shape so that the optical power can be measured while suppressing the reflection from the end surface of the optical fiber. As a result, the optical connector plug 4 is first
When the ferrule 25 and the ferrule 27 are connected to the shell member 1, there is no air layer, and the surface of the ferrule 25 in contact with air, that is, the end face 25c is obliquely polished, so that the optical connector plug 4 side The reflected light will not return to.

Further, the first shell member 1 is provided with a lock lever 31. The lock lever 31 is provided with a pair of lock lever plates 31a and 31b on a pair of side walls 5b of the first flange 5 which face each other. These lock lever plates 31a and 31b are the first
The shell member 1 is rotatably supported by a rotary shaft 32 provided on each of a pair of opposing side walls 5b.

That is, the lock lever 31 is attached to the first shell member 1 so as to be rotatable between the first and second shell members 1 and 2 along a circular path. A rod-shaped operating member 33 for rotating the lock lever plates 31a, 31b with the rotation shaft 32 as a fulcrum is connected to one end sides of the lock lever plates 31a, 31b. A notch-shaped engaging portion 34 is formed on the lock lever plates 31a and 31b on the side opposite to the operation member 33 with the rotating shaft 32 as the center. The second shell member 2 has a second flange 2
1, a pair of side walls 21b facing each other are provided with protrusion-shaped engagement receiving portions 35 that engage with the engaging portions 34 of the lock lever plates 31a and 31b.

The lock lever 31 has an elastic member 36.
Is provided. The elastic member 36 is provided between the rotary shaft 32 and the operating member 33, and between the pair of lock lever plates 31a and 3a.
It is connected between 1b. The elastic member 36 is in the shape of, for example, a pipe or a round bar, and uses a resilient member. As shown in FIG. 3, the first flange 5 is provided with an engagement protrusion 37 that abuts the elastic member 36 when the lock lever 31 is rotated along a circular orbit. Then, when the lock lever 31 is engaged with the engagement receiving portion 35, the elastic member 36 is configured to pass over the engagement protrusion 37 and hold the locked state of the lock lever 31. As an example of the engaging protrusion 37, the engaging protrusion 37 is not limited to one place of the first flange 5, and the engaging protrusion 37 may be provided over a plurality of engaging protrusions 37 or the entire width of the first flange 5. You may form.

Next, the procedure for fastening the optical connector configured as described above will be described below. When one end of the second shell member 2 is inserted and fitted into the first shell member 1 and the lock lever 31 is rotated clockwise on the paper surface as shown in FIGS. As shown in FIG. 3, the engagement portion 34 of the lock lever 31 engages with the engagement receiving portion 35 of the second shell member 2 so that the first shell member 1 and the second shell member 2 are fitted together. Lock it. At this time, the elastic member 36 elastically rides over the engaging projection 37a and the locked state is maintained. In this way, the elastic member 36 is engaged with the engaging protrusion 37.
Since the free movement of the lock lever 31 on the circular orbit is restricted by overcoming a, the lock can be held in a stable state.

In such an optical connector, the optical connector plug 4 is fitted to the first shell member 1 from the outside of the device, and the coupling nut 4a is connected to the tubular connecting portion 7 of the first shell member 1. When the ferrule 25 is screwed into the threaded portion 7a, the ferrule 25 is abutted in the alignment sleeve 11 for optical connection. Then, from such a state, the optical connector plug 4 is removed, and the lock lever 31 is moved to the position shown in FIGS.
When the lock is released by rotating in the counterclockwise direction, the second shell member 2 can be separated from the first shell member 1. At this time, since the one end surface 25b of the ferrule 25 is exposed, the end surface 25b can be easily cleaned. Also, like the photodetector of an optical power meter,
When it is necessary to attach a plurality of types of optical receptacles used by the user to the input section, it is possible to easily deal with it by forming the first shell member 1 into a shape that fits with various optical connectors. can do. Thereby, the first
Since only the shell member 1 is replaced, and the positional relationship between the photodetector of the optical power meter and the emission surface of the ferrule 25 does not change, the sensitivity of the photodetector does not change.

According to the embodiment described above, the end face of the ferrule 27, which is ground into the convex or convex spherical shape of the optical connector plug 4 connected to the cylindrical connecting portion 7 from the outside of the device, is the second shell. Since it comes into contact with the end face of the ferrule 25 that has been polished into a convex shape or a convex spherical shape in the member 2, almost all reflected light can be eliminated. Moreover, ferrule 25
Since the other end is polished obliquely, it is possible to eliminate the reflected light from this part without returning to the optical connector plug 4 side.

With the rotation shaft 32 as a fulcrum, the lock lever 31
By moving the shell member along a circular path,
Since the first shell member 1 can be removed from the second shell member 2 in a short time by releasing the connection between the two,
The end surface of the ferrule 25 of the shell member 2 can be easily cleaned in a short time.

By exchanging the first shell member 1 with one that is compatible with another type of optical connector plug, the second shell member 2 can be shared without being exchanged, and the type of optical connector to be connected can be facilitated. Can be changed.

Since the elastic member 36 rides over the engaging projection 37, the free movement of the lock lever 31 on the circular orbit is restricted, so that the lock can be held in a stable state.

Next, FIG. 5 is a sectional view showing a second embodiment of the optical connector according to the present invention, and FIG. 6 is a partial perspective view showing a detent member for holding a ferrule in the optical connector of the second embodiment. is there. In the optical connector of this embodiment, the ferrule 25 is fixed to the second shell member 2 in the first embodiment, whereas the ferrule 2 is used.
5 is always biased toward the first shell member 1
It is different in that it is held by the shell member 2. Since the other configurations are the same as those of the first embodiment, the same reference numerals are given and the description thereof will be omitted.

The end surface 25b of the ferrule 25 on the side of the aligning sleeve 11 is polished into a convex shape or a convex spherical shape, and the other end 25
c is obliquely polished. A circumferential flange 41 is formed on the body of the ferrule 25. A pressing member 42 is press-fitted into one end 2b of the second shell member 2, and is provided between the inner wall surface of the flange portion 42a of the pressing member 42 and the end surface 41a of the flange 41 of the ferrule 25 as a biasing member by a spring. The elastic body 43 of is arranged.
The ferrule 25 is slidably held between the second shell member 2 and the pressing member 42, and is biased toward the first shell member 1 side by the elastic body 43. First shell member 1
When the optical connector plug 4 is connected to the ferrule 2
The position of the end face 27a of 7 slightly varies depending on the type of the optical connector, but since the ferrule 25 is always urged by the elastic body 43 with a constant force, the ferrule 25 and the ferrule 27 come into contact with each other with a stable contact pressure. It becomes possible to do.

Further, as shown in FIG. 6, rectangular convex portions 44 are formed on the upper and lower sides of the flange 41, and the tip portion of the pressing member 42 is provided with a cut portion for engaging the convex portion 44 of the flange 41. The notch 45 is formed. As a result, when the convex portion 44 of the flange 41 is engaged with the notch 45, the second
Since the rotation of the ferrule 25 inside the shell member 2 is prohibited, the light emitted from the other end of the fiber 26 can be always guided in a constant direction, that is, in the direction of the light collecting surface of the PD in the photodetector. it can.

In addition to the above-described structure, a flat surface may be formed on a part of the outer shape of the ferrule 25, or flat surfaces parallel to each other may be formed so as to face each other. Good. In this case, the through holes 24 in which these flat surfaces are located are also formed in the same shape.

[0038]

As described above, according to the optical connector of the present invention, the ferrule of the optical connector plug connected to the first shell member and the ferrule in the second shell member have a convex shape. Alternatively, since the end surfaces polished into a convex spherical shape are in contact with each other, the reflected light can be almost eliminated.
Moreover, since the other end of the ferrule is obliquely polished, it is possible to almost completely prevent the reflected light from this portion from returning to the optical connector plug side.

Further, the ferrule provided on the second shell member, in a state where the connection between both shell members is released,
Since the surface polished into the convex shape or the convex spherical shape is exposed on the side of the connecting portion, the ferrule end surface can be easily cleaned in a short time.

According to the optical connector of the second aspect, the first
When the optical connector plug is connected to the shell member, the position of the ferrule end face of the optical connector plug varies slightly depending on the type of the optical connector, but the ferrule is held slidably by the elastic member with respect to the second shell member. Since the first shell member side is always biased, the ferrules can be brought into contact with each other by a stable contact pressure.

According to the optical connector of claim 3, the second connector is provided.
Since the rotation of the ferrule inside the shell member is prohibited, the light emitted from the other end of the fiber can be always guided in a constant direction, for example, the direction of the light collecting surface of the PD in the photodetector.

[Brief description of drawings]

FIG. 1 shows a first embodiment of an optical connector according to the present invention,
A perspective view showing a state in which the optical connector is disassembled.

FIG. 2 is a perspective view showing a state in which the optical connectors are combined.

FIG. 3 is a sectional view of the optical connector in a coupled state.

FIG. 4 is a sectional view showing a state in which an optical connector plug is connected to the optical connector.

FIG. 5 is a sectional view showing a second embodiment of the optical connector according to the present invention.

FIG. 6 is a partial perspective view showing a detent member that holds a ferrule in the optical connector of the second embodiment.

FIG. 7 is a diagram showing an example of a measurement system in which an optical connector is used.

FIG. 8 is a perspective view showing a conventional optical adapter in which an optical connector plug is connected to one side.

FIG. 9 is a perspective view showing a fastening state of a conventional optical adapter.

FIG. 10 is a cross-sectional view showing a configuration of a conventional optical receptacle used for a photodetector of an optical power meter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... 1st shell member, 2 ... 2nd shell member, 4 ... Optical connector plug, 6 ... Stepped cylinder part (connection part), 7 ... Cylindrical connection part (connection part), 22 ... Stepped opening part (Connection part), 25 ...
Ferrule, 26 ... Faber, 27 ... Ferrule, 31
... Lock lever, 43 ... Elastic body (biasing member), 44 ... Convex part, 45 ... Notch.

Claims (3)

[Claims] 1. An optical connector for connecting an optical connector plug fiber-connected to one optical circuit to another optical circuit, having connecting portions (6, 7) on both sides, and one connecting portion (7). ) To which an optical connector plug (4) is detachably connected
A shell member (1), a second shell member (2) having a connecting portion (22) on one side to which the other connecting portion (6) of the first shell member is detachably connected, Fastening means (3) for locking the connection state between the other connection portion of the first shell member and the connection portion of the second shell member.
1, 35) and one end (25b) contacting the ferrule end surface (27a) of the optical connector plug is polished to a convex shape or a convex spherical shape, and the other end (25c) is obliquely polished to form the convex shape or A ferrule (25) provided on the second shell member so that the one end polished into a convex spherical shape is exposed to the connection portion side of the second shell member; and the first ferrule (25) for holding the ferrule. An optical connector, comprising: an alignment sleeve (11) provided on the first shell member. 2. An urging member (4) slidably held with respect to the second shell member and urging the ferrule in a direction of pressing the ferrule end surface of the optical connector plug.
The optical connector according to claim 1, further comprising 3). 3. A detent member (4) for inhibiting movement of the ferrule with respect to the second shell member in a rotational direction.
The optical connector according to claim 1, further comprising: