JPH0213762B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical connector used for connection between optical fibers and between optical fibers and equipment;
In particular, it relates to an optical connector with a simplified structure.

In recent years, optical fiber has been widely used as a new communication transmission medium not only for long-distance transmission but also for short-distance transmission within 100 m or less. Optical connectors are used in such optical communication systems to switch devices,
It is an essential part of the system configuration used to removably connect the optical fiber when removing the transmitter/receiver, etc., and includes a housing that forms a pair on the insertion side and the receiving side, and the optical fiber end. and a fiber holder that is attached near the housing and fitted into the housing.

Traditionally, optical connectors have been developed for long-distance transmission;
In order to reduce losses due to misalignment, etc., fiber holders are required to have high precision. Therefore, both alignment and non-alignment type fiber holders are complex and highly precise, requiring work such as removing the coating from the optical fiber, and are not easy to attach to the optical fiber, making them unsuitable for mass production. There's a problem. or,
Correspondingly, the housing must also be complicated and highly precise. Therefore, optical connectors made of these devices also have complicated structures, are not easy to assemble, and are expensive.

However, in short-distance transmission, loss is not so much of a problem, and cheap, large-diameter plastic fibers are often used, so accuracy is not required. Rather, there is a demand for optical connectors that have a simplified structure, are inexpensive, and are easy to assemble.

The present invention has been made in view of the above circumstances, and has a simple structure, parts that can be easily manufactured and is inexpensive, assembly work such as installing optical fibers is easy, and the overall structure is inexpensive. The purpose is to provide optical connectors that can be obtained.

That is, the present invention provides an optical connector in which a fiber holder is attached to the outer periphery near the end of the optical fiber, and the fiber holder is fitted to each of the insertion side and the receiving side of the housing, wherein the fiber holder is attached to the inner surface ( It is composed of a plate-shaped body provided with a locking protrusion that protrudes toward the optical fiber contact surface and locks the fiber, and a locking portion that projects outward and engages with the locking means of the housing. is bent along the outer periphery of the optical fiber sheathing and closely attached to the optical fiber, and a holding portion holds the housing so that the fiber holder attached to the optical fiber is fitted into the housing so that the optical fibers are concentrically opposed when fitted. and a locking means for locking the inserted fiber holder on the insertion side and the receiving side, respectively, and a mechanism for removably fitting the insertion side and the receiving side of the housing. It is configured by providing.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a cross-sectional view showing a first embodiment of the optical connector of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA. In these figures, the optical connector of the present invention is constructed by closely mounting a fiber holder 10 on the outer periphery near the end of an optical fiber 1, and fitting this into each of the insertion side 21 and receiving side 22 of the housing 20. Ru.

The structure of the fiber holder 10 is shown in FIGS. 3 to 4B. FIG. 3 is an enlarged plan view showing an example of a fiber holder used in the present invention.
2. It consists of a plate-shaped body provided with a lance 13 and a locking protrusion 14.

The fiber holder 10 is formed by punching or other means from a metal plate such as iron, and its length in the axial direction (in the left-right direction in the figure) is such that it can be accommodated in the housing to which it is attached. The width is set to a length that allows the optical fiber to be wrapped approximately once around the coating in a cylindrical shape. The covering part 11 has the above-mentioned locking protrusion 1
2. Triangular covering pieces 11a, 11b, 11c are provided on the distal end side (left side in the drawing) of the remaining part of the plate-like body excluding the lance 13 and the locking protrusion 14, On the right side) there is a rectangular covering piece 11d, 1
1e are provided respectively. Fiber holder 10
is formed in an expanded shape, but when used, it is bent into a cylindrical shape such as a cylinder as shown in FIGS. 6A and 6B.
As shown in the figure, it may be formed by being bent in advance into a U-shape.

The locking protrusion 12 is cut and raised on the inner surface (optical fiber contact surface) side of the plate-shaped body, and is provided in a protruding manner by burring or other means, and bites into the coating of the optical fiber to prevent the optical fiber from coming off. . In this embodiment, the shape is triangular in order to improve the penetration into the coating, but the shape is not limited to this, and any shape may be used as long as it is in the shape of a protrusion. Figs. 5A and 5B show burrings. In the case of cutting and raising, the direction can be arbitrary, but if it is cut and raised in a direction perpendicular to the axial direction as in this embodiment, the locking effect becomes greater. Further, the protrusion height is made smaller than the thickness of the coating in order to avoid damaging the optical fiber. Furthermore, the number and arrangement can be determined as appropriate depending on the shape of the fiber holder 10.

The lance 13 and the locking protrusion 14 are locks that protrude to the outer surface of the fiber holder and fix the fiber holder 10 so that it does not move in the axial direction and come off the housing 20 when the fiber holder 10 is inserted into the connector housing 20. The locking means 28 (see FIG. 1) of the housing 20 engages with the locking means 28 (see FIG. 1), the former preventing movement in the proximal direction and the latter preventing movement in the distal direction.

Two lances 13 are provided symmetrically in a substantially rectangular shape at the intermediate portion of the plate-like body constituting the holder, and
The short side on the tip side is cut and raised in an oblique direction to serve as a support, giving it appropriate springiness. The shape of the lance 13 may be arbitrary as long as it has a function as a locking portion and has spring properties, and the number is not limited to two.

Two locking protrusions 14 are provided as locking pieces on the base end side of the fiber holder 10, and are bent so as to protrude substantially perpendicularly from the outer periphery in advance or when surrounding the optical fiber in a cylindrical shape. Unlike the lance 13 described above, this locking convex portion 14 does not need to have spring properties. Further, since it is sufficient to prevent the holder 10 from moving in the distal direction, the shape and size may be such that they can be engaged with the locking means 28 of the housing 20, and the number is not limited to two. For example, it may be formed into a flange shape.

Next, the configuration of the housing 20 is shown in FIGS.
Shown in Figure 0. FIG. 7 is a cross-sectional view showing an example of the housing body used in the optical connector of the present invention, FIG. 8 is a cross-sectional view taken along line AA, FIG. 9 is a cross-sectional view taken along line B-B, and FIG. FIG. 3 is a perspective view showing an example of a locking member to be attached. In these figures and FIGS. 1 and 2, the housing 20
The main body includes a pair of insertion side 21 and receiving side 22, holding parts 25 and 26, and a snap mechanism 27.
Locking means 2 consisting of a locking portion 29 and a locking member 30
8.

The insertion side 21 and the receiving side 22 are formed separately, and are configured to have a cylindrical shape as a whole when fitted. The insertion side 21 has an insertion part 23,
Further, receiving portions 24 are provided on each receiving side 22, and these are integrally provided with synthetic resin or the like. It is desirable to use a resin that is opaque to at least the wavelength of the light used.

The insertion portion 23 has a cylindrical shape protruding from the tip of the insertion side 21, and a convex portion 27a is provided on the outer periphery of the insertion portion 23. On the other hand, the receiving part 24 has a cylindrical shape protruding from the distal end side of the receiving side 22 and has a hole into which the insertion part 23 can be inserted, and has a groove in the inner wall that engages with the convex part 27a. 27b is provided. These convex portions 27a and grooves 27b constitute a snap mechanism 27, and the insertion side 21 and the receiving side 22 are removably engaged. However, the locking between the insertion side 21 and the receiving side 22 when they are fitted is not limited to the snap mechanism, but may be configured to lock with a claw or the like.

The insertion portion 23 has an opening at its tip, and each step portion 29a, 29b, 29 of the locking portion 29, which will be described later.
A holding portion 25 consisting of a through hole communicating with c is provided. Further, the receiving portion 24 has an opening at its cylindrical bottom surface, and each step portion 29a, 29b, of the locking portion 29.
A holding portion 26 communicating with 29c is provided. The holding parts 25 and 26 are connected to the insertion part 23 in order to communicate concentrically and with the same diameter when the insertion part 23 and the receiving part 24 are fitted together.
and provided around the central axis of the receiving part 24,
The fiber holders 10 are held so that the tips of the optical fibers to which the fiber holders 10 are attached are concentrically opposed to each other.

The inner diameter of the holding parts 25 and 26 is set to be approximately equal to the diameter at which a fiber holder attached to the optical fiber can be removably inserted, that is, the outer diameter of the fiber holder. It is desirable that the play between the inner diameters of the holding parts 25 and 26 and the fiber holder be kept small to the extent that insertion of the fiber holder does not become difficult, in order to reduce axis misalignment of the optical fiber. Further, as shown in FIG. 1, the length of the holding part 26 is set so that the tip of the fiber holder 10 to be inserted projects into the cylinder of the receiving part 24.
The length accommodates the fiber holder 10 on the insertion side that is inserted from the base side thereof, and also accommodates the fiber holder 10 on the receiving side that protrudes into the cylinder of the receiving portion 24 from its tip when mated. The length is set as long as possible.

The locking means 28 includes a locking portion 29 on each of the insertion side 21 and the receiving side 22, and first, second, and third step portions 29a, which are connected to each of the holding portions 25 and 26.
29b and 29c are sequentially increased in diameter and provided concentrically, and a U-shaped spring mounting hole 2 is provided in the third step portion 29c.
9d, and locking members 30 are fitted in these appropriate positions, and the fiber holder 10 attached to the optical fiber is locked to each of the insertion side 21 and the receiving side 22. However, the locking means 28 is
As shown in the embodiments to be described later, the configuration can be varied depending on the structure of the fiber holder and the form of the locking member.

The locking member 30 includes a ring-shaped elastic body 31
, the first and second washers 32 and 33 which are attached to the locking member 29 with this in between, and the U-shaped spring 3.
It consists of 4. The elastic body 31 is made of an elastic substance such as rubber, and is formed into a ring or cylindrical shape having a through hole 31a in the center through which the fiber holder 10 can be inserted.
It is pressed by the lance 13 and contracts. Further, the first washer 32 is formed to have approximately the same diameter as the elastic body 31, is fitted into the second step portion 29b so as to be able to come into contact with the lance 13, and is pressed by the lance 13. At this time, the lance 13 is prevented from biting into the end face of the elastic body 31. However, if this biting can be ignored depending on the condition of the end surface of the elastic body 31, the washer 32 may be omitted.

On the other hand, the second washer 33 is formed to have a larger diameter than these, is fitted into the third step portion 29c, and is attached to the locking convex portion 1 of the fiber holder 10 on the inner peripheral side.
4 to prevent the holder 10 from moving in the distal direction. In addition, the U-shaped spring 34 has a metal pin that is approximately U-shaped.
It is bent into a U-shaped spring mounting hole 29d, and is attached to the second washer 3.
3 to the third step portion 29c, the elastic body 31 and the first washer 32 are locked.

The first step portion 29a is the fiber holder 1.
The second step portion 29b is provided with a diameter and length that allows the first washer 32 and the elastic body 31 to be inserted therein. . Further, the third step portion 29c is configured to have a diameter and a length to accommodate the second washer 33 and to provide a U-shaped spring mounting hole 29d. The U-shaped spring mounting hole 29d is a hole having a cross-sectional shape through which the U-shaped spring 34 can be inserted. It is installed perpendicular to the axial direction in consideration of the In addition, the third stage part 2
9c may be omitted if the movement of the fiber holder 10 in the distal direction can be kept within a predetermined range by the elastic body 31 and this does not cause any particular trouble to the optical connector. In this case, the washer 33 has a diameter that can be fitted into the second step 29b, and the U-shaped spring mounting hole 29d is provided at a corresponding position in the second step 29b.

Next, the assembly of the optical connector of this embodiment will be explained together with the functions of each part with reference to the above figures.

The fiber holder 10 is attached to the optical fiber 1 using a flat or U-shaped fiber holder 10.
First, place the end of an optical fiber 1 with a coating 3 attached to a core 2 made of plastic or the like, with the coating 3 still attached, and place it with the tip 4 aligned with or slightly protruding from the tip of the fiber holder 10, and place it in an appropriate position. This is done by bending the fiber holder 10 along the outer periphery of the coating 3 using a tool (see FIGS. 6A and 6B). At this time, the covering pieces 11a, 1 of the fiber holder 10
1b, 11c are the convex part of 11b and 11a, 11c
A cylinder is formed by fitting the concave portions between the covering pieces 11d and 11e, and the side end surfaces of the covering pieces 11d and 11e abut each other to form a cylinder.
closely adhere to. Note that the optical fiber tip 4 may be polished if necessary before or after installation.

During the above installation, the locking protrusion 12 is attached to the optical fiber 1.
The fiber holder 10 is brought into pressure contact with the fiber holder 10, and its pointed end bites into the coating 3 (not shown; similar conditions are shown in FIGS. 14 and 15, although they are in other embodiments). is securely attached to the optical fiber 1.

Next, this fiber holder 10 is attached to the housing 20. Attachment is performed after attaching the locking member 30 to the housing body. However, after the locking member 30 is attached to the fiber holder 10, the fiber holder 10 and the locking member 30 may be fitted into the housing body.

To attach the locking member 30, the first washer 32 and the ring-shaped elastic body 31 are inserted in this order into the second step portion 29b, and the second washer 33 is inserted into the third step portion 29c. Next, the U-shaped spring mounting hole 29
d, and insert the U-shaped spring 34 into the washer 3.
Lock 3. Thereby, the elastic body 31 and the washer 32 are engaged.

After this, on the insertion side 21 and the receiving side 22,
The fiber holder 10 is attached to the washer 33, the elastic body 31, and the through holes 33a, 31 of the washer 32.
a, 32a, and fit into the holding parts 25, 26 through the first step part 29a, respectively. In this case, since the lance 13 has spring properties, when passing through the elastic body 31 and washers 32 and 33,
It is easily pressed against the outer periphery of the optical fiber 1 and does not interfere with installation. Also, after installation, this lance 13
expands again due to its springiness within the first step portion 29a and protrudes in an oblique direction, and its tip is connected to the washer 3.
2 to prevent the fiber holder 10 from coming off. The locking convex portion 14 is attached to the washer 33.
and prevents movement of the fiber holder 10 in the distal direction.

As described above, an optical connector can be constructed, and the insertion side 21 and the receiving side 22 are formed by inserting the insertion part 23 into the receiving part 24 and forming the convex part 27a and the groove 27b which constitute the snap mechanism 27. By engaging the two, the connector is connected.

Note that the optical connector of this embodiment uses the elastic body 31 to enable the fiber holder 10 to be displaced in the proximal direction and to apply a pressing force, so that the opposing optical fiber tip surfaces 4, 4 can be placed in close contact with each other, and the impact applied to the optical fiber can be absorbed to prevent damage to the end face of the optical fiber. Further, in this embodiment, since the U-shaped spring 34 is configured to lock the elastic body 31, etc., the locking is released by removing the spring 34, and these locking members 30 are removed. can, therefore,
Fiber holder 10 can be removed from housing 20. However, the fiber holder can also be removed using a member other than the U-shaped spring, as shown in other embodiments to be described later.

Next, FIG. 11A is a sectional view showing the insertion side of a second embodiment of the optical connector of the present invention, and FIG. 11B is a side view thereof. In the optical connector of this embodiment, the elastic body 31 and the like are removably locked by a snap spring 35. Except for the locking means, the other configurations are the same as those of the first embodiment, so the same reference numerals are given and the explanation will be omitted.

The locking means of this embodiment includes a locking portion 29 consisting of first and second step portions 29a, 29b concentrically provided with successively larger diameters and a groove portion 29e provided in the second step portion 29b, and a washer. 37, a locking member 30 consisting of an elastic body 31 and a snap spring 35. Similar to the first embodiment above, the first
The lance 13 of the fiber holder 10 is attached to the stepped portion 29a.
is stored in the second stage portion 29b, and the washer 3 is stored in the second step portion 29b.
7 and the elastic body 31 are inserted. The second step portion 29b is provided with the groove portion 29e, such as a concave groove, at a position corresponding to the end of the elastic body 31 to be fitted, and a snap ring 35 is removably attached thereto. 31 and prevents movement of the fiber holder 10 in the distal direction.

The snap spring 35 is, for example, C-shaped (E
Some are shaped like letters. ), the notch 35a,
35b. The notch 35a provided on the outer periphery is for engaging a tool to deform the snap spring 35 during installation, and the notch 35b provided on the inner periphery is for facilitating this deformation. It is. It should be noted that the snap spring 35 is not limited to the one in this embodiment, and various other types can be used. For example, the notch 35
In place of a and 35a, a locking protrusion can be used.

The washer 37 is formed to have a concave cross section, and by suppressing the expansion of the lance 13, when the lance 13 protrudes into the second step portion 29 having a large diameter by pressing the elastic body 31, the lance 13 is prevented from expanding. This has the effect of preventing the tip of No. 13 from sliding on the washer surface and spreading too much, causing buckling. This washsha 37 is
The present invention can also be applied to other embodiments of optical connectors that use a fiber holder with a lance and an elastic body. However, if the strength of the lance 13 is sufficiently large compared to the pressing force, the ordinary washer 32 shown in the other embodiments will suffice.

Next, FIG. 12 is a sectional view showing a third embodiment of the optical connector of the present invention. The optical connector of this embodiment uses a collar 36 as a locking member to simplify the structure and reduce the number of parts.
This embodiment also has the same structure as the first embodiment except for the locking means.

The locking means 28 of this embodiment includes first and second step portions 29a and 29 that are provided concentrically with successively larger diameters.
b, and a collar 36 fitted as a locking member to the second step portion 29b. The fiber holder 10 is attached to the housing 20 by inserting the fiber holder 10 into the through hole 36a of the collar 36 after fitting the collar 36 into the second step portion 29b.

In each of the above embodiments, optical connectors using fiber holders of the same type are shown, but optical connectors can be constructed using fiber holders of different types, and the types shown in FIGS. 13 to 15 are An example of a fiber holder is shown below.

The fiber holder shown in these figures uses a substantially rectangular plate-like body and is configured to enclose an optical fiber in the form of a split sleeve. and,
In the case shown in FIG. 13, the locking protrusion 12 is
3, and the one shown in FIG. 14 has the locking protrusion 12 as a hemispherical convex part,
The locking protrusion 14 is in the shape of a flange, and in the one shown in FIG. 15, the locking protrusion 12 is conical and the locking protrusion is a stepped portion 15.

Next, FIG. 16 is a sectional view showing the insertion side of a fourth embodiment of the optical connector of the present invention. In the optical connector of this embodiment, the locking part of the fiber holder is formed by a lance and a locking convex part in each of the above embodiments, whereas the position of the fiber holder 10 corresponding to the tip of the lance is A protruding piece 16 that protrudes vertically outward is provided on the holder, and this serves as a locking part. In the case of this embodiment, the housing 2
0 may be provided as a step portion 29f corresponding to the second step portion 29b in the third embodiment, and after inserting the fiber holder 10 attached to the optical fiber 1 into the housing, An optical connector is constructed by fitting the collar 36 into the stepped portion 29f.

Next, FIG. 17 is a sectional view showing the insertion side of a fifth embodiment of the optical connector of the present invention. In the optical connector of this embodiment, the lance 13 and the protruding piece 16 constitute a locking portion of the fiber holder, and the locking means of the housing is formed by a locking portion 29 and a locking member similar to that of the second embodiment. It consists of 30 parts,
The other configurations are the same as in the first embodiment.

The fiber holder 10 of this embodiment has a covering portion 11
A lance 13 is provided in the middle part, and a protruding piece 16 that vertically protrudes outward is provided near the tip of the lance 13. Of course, the inner surface has a fiber locking protrusion (not shown) similar to the fiber holder of the other embodiments. or,
The locking means of this embodiment includes first and second step portions 2 provided as locking portions 29 on the main body of the housing 20.
9a, 29b and the groove 29e, a washer 32 fitted into these as a locking member 30, and an elastic body 3.
1 and a snap spring 35. In this embodiment, the fiber holder 10 is locked so that the washer 32 is sandwiched between the lance 13 and the protruding piece 16. Snap spring 35 is
This washer 32 and elastic body 31 are locked together. Note that, similarly to the first embodiment, the elastic body 31 may be locked using a U-shaped spring.

In each of the above embodiments, the insertion part and the receiving part of the housing are formed in a cylindrical shape, but the invention is not limited to this, and the insertion part may have a rod shape and the receiving part may have a hole that can fit into the rod shape. Furthermore, the outer shape of the entire housing does not necessarily have to be formed into a cylindrical shape, but can be formed into a prismatic or other arbitrary shape, and further,
It may also be configured to be attached or attached to a part of the transmitting device or the like. Furthermore, the optical connector of the present invention is not limited to optical fibers, and as long as at least one end has the same shape and structure, a lens or other object can be attached to the insertion side or receiving side.

As explained above, the present invention includes a fiber holder made of a plate-like body having a fiber locking protrusion protruding from its inner surface and a locking portion that engages with a locking means of a housing at an appropriate location on its outer surface. By doing so, the structure of the fiber holder is simplified and manufacturing is facilitated, and since the fiber holder is bent along the outer periphery of the optical fiber coating and closely attached to the optical fiber, it is easy to attach to the optical fiber. It has the effect of not damaging the fiber. The present invention also provides a housing with a holding part for fitting and inserting a fiber holder attached to an optical fiber into each of the insertion side and the receiving side and holding the optical fiber so that the optical fibers are concentrically opposed when fitted, and a holding part for holding the optical fiber so that the fiber holder attached to the optical fiber is coaxially opposed to each other when the housing is fitted; By providing a locking means for locking the holder, it is possible to reliably cause the fiber holder to face each other concentrically without the need for complicated and difficult work such as alignment, and furthermore, the holding portion can be The structure can be extremely simplified because the through holes are provided in the rod-shaped insertion portion on the insertion side and on the bottom of the receiving hole on the receiving side. Therefore, according to the present invention, it is possible to obtain an optical connector which has a simple structure, whose parts can be easily manufactured and is inexpensive, whose assembly work such as attachment of optical fibers can be easily performed, and which can be constructed at a low cost as a whole. Can be done.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a first embodiment of the optical connector of the present invention, Fig. 2 is a sectional view taken along line A-A thereof, and Fig. 3 is an enlarged plan view showing an example of a fiber holder used in the optical connector of the invention. , FIG. 4A shows the above holder in U
FIG. 4B is a plan view showing the fiber holder bent in a U-shape, FIG. Its cross-sectional view,
FIG. 6A is a plan view showing the fiber holder attached to the end of the optical fiber, FIG. 6B is a side view thereof, and FIG. 7 is a sectional view showing an example of the housing body used in the optical connector of the present invention. Figure 8 is A.
-A cross-sectional view, Figure 9 is also B-B cross-sectional view, 1st
0 is a perspective view showing an example of a locking member attached to the housing body, FIG. 11A is a sectional view showing the insertion side of the second embodiment of the optical connector of the present invention, and FIG.
Fig. B is a side view thereof, Fig. 12 is a sectional view showing a third embodiment of the optical connector of the present invention, Fig. 13 is an enlarged plan view showing another example of the fiber holder used in the optical connector of the present invention, and Fig. 14 and 15 are sectional views showing still other examples, FIG. 16 is a sectional view showing the insertion side of the fourth embodiment of the optical connector of the present invention, and FIG. 17 is a sectional view showing further examples.
The figure is a sectional view showing the insertion side of the fifth embodiment of the optical connector of the present invention. 1...Optical fiber, 2...Core, 3...Coating, 4
... Tip, 10 ... Fiber holder, 11 ... Covering part, 12 ... Locking projection, 13 ... Lance, 14
... Locking convex portion, 15 ... Step portion, 16 ... Projection piece,
20...Housing, 21...Plug-in side, 22...
Receiving side, 23... Insertion part, 24... Receiving part, 2
5, 26... Holding section, 27... Snap mechanism, 2
8... Locking means, 29... Locking portion, 29a, 29
b, 29c...first, second, third step portions, 29d...
...U-shaped spring mounting hole, 29e...groove, 29f...
Stepped portion, 30...Locking member, 31...Elastic body, 3
2, 33, 37...washia, 34...U-shaped spring, 35...snat spring, 36...color.

Claims (1)

[Scope of Claims] 1. An optical connector in which a fiber holder is attached to the outer periphery near the end of the optical fiber, and the fiber holder is fitted to each of the insertion side and the receiving side of the housing, wherein the fiber holder is attached to the inner surface of the housing. It consists of a plate-shaped body provided with a locking protrusion that protrudes to the side and locks the fiber, and a locking part that projects outward and engages with the locking means of the housing, which is bent along the outer circumference of the coating. The housing has a holding part that holds a fiber holder attached to the optical fiber so that the fiber holder faces concentrically with each other when mated, and the housing engages the fiber holder that has been inserted. A locking means for locking the housing is provided on each of the insertion side and the receiving side, and a mechanism is provided for removably fitting the insertion side and the receiving side of the housing. optical connector. 2 The fitting mechanism of the insertion and receiving side of the housing is provided by providing an insertion part on the insertion side that opens the holding part at the tip and protrudes, and having the holding part opened at the bottom surface, and the insertion part 2. The optical connector according to claim 1, wherein the receiving side is provided with a receiving portion comprising a hole that can be detachably fitted into the optical connector. 3. As a locking portion of the fiber holder, a lance projecting obliquely at an appropriate position in the intermediate portion of the holder and a locking convex portion projecting outward at the base end of the holder are provided, and the locking portion of the housing is provided. As a means, first and second step portions are sequentially provided adjacent to the holding portion on the base of the insertion side and the receiving side, and a ring-shaped locking member is fitted to the second step portion. , Claim 1 or 2, wherein when the fiber holder is inserted into the housing, the lance and the locking protrusion engage with the locking member and lock the holder. Optical connector listed. 4. As a locking portion of the fiber holder, a lance projecting obliquely at an appropriate position in the middle of the holder, and a protruding piece projecting outward near the tip of the lance of the holder, and a locking portion of the housing. As a means, first and second step portions are sequentially provided adjacent to the holding portion on the base portions of the insertion side and the receiving side, and
A washer is fitted into the second step portion at a position where it is held between the lance and the protruding piece, and a ring-shaped locking member is fitted and provided to lock the washer, and a fiber holder is attached to the housing. 2. The optical connector according to claim 1, wherein when the holder is inserted, the washer is held between the lance and the protruding piece to lock the holder. 5. The locking member is composed of an elastic body, a first washer having approximately the same diameter, a second washer having a larger diameter than these, and a U-shaped spring that locks the second washer, and , a third step part is provided outside the second step part, a U-shaped spring mounting hole is provided in the third step part, the first washer and the elastic body are fitted into the second step part, and then the third step part is provided with a U-shaped spring mounting hole. 4. The optical connector according to claim 3, wherein the second washer is fitted into the three-step portion and a U-shaped spring is mounted in the U-shaped spring mounting hole. 6. The locking member is composed of an elastic body, a washer having approximately the same diameter, and a snap spring having a larger diameter than these, and a groove is provided in the second step, and the washer and the elastic body are provided in the second step. 4. The optical connector according to claim 3, wherein the optical connector is fitted into the groove, and a snap spring is fitted into the groove to lock the two.