JP3282974B2 - Optical connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector used for connection between optical fibers or between an optical fiber and a photoelectric conversion element.

[0002]

2. Description of the Related Art In general, an optical signal transmission line using an optical fiber is laid by being optically connected to each other at an appropriate distance by using an optical connector or the like. And Japanese Utility Model Publication No. Sho 61-126204 and Japanese Patent Publication No. Hei 8-7306.

That is, in the optical connector disclosed in Japanese Utility Model Laid-Open Publication No. 61-126204, a hay for accommodating a ferrule is divided into upper and lower parts, and a ferrule and a spring (compression coil spring) are provided in the divided upper and lower housings. ) Are formed therein. The upper and lower housings are configured to be fixed to each other by screwing in a state where the ferrule, the spring, and the like are sandwiched and retained from both upper and lower sides in the accommodation groove portion and retained.

[0004] The optical connector disclosed in Japanese Patent Publication No. 8-7306 has a plug body and a floating holder that can be floated in the plug body, and as shown in FIG. Is the ferrule storage recess 1
02 and a holding member fitting concave portion 103 are formed.

Then, a ferrule 105 and a spring 106 attached to the tip of the optical fiber 104 are inserted into the ferrule housing recess 102 and the holding member fitting recess 103 of the floating holder 101, and the ferrule holding member 107 is inserted.
Into the holding member fitting recess 103. By inserting the ferrule holding member 107, the ferrule holding member 1
07 are engaged with the respective locked portions 101a of the floating holder 101 to be retained and retained.

At this time, the spring 10 in the compressed state is
6, the ferrule 105 is urged in the insertion direction, that is, the tip direction.

The assembled floating holder 101 is housed in the upper and lower split type plug body, and is fixed to each other by screwing the upper and lower plug bodies.

[0008]

However, according to the above-described structure in which the vertically divided housing or plug body is fixed by screws, there is a drawback that the assembly work is troublesome and troublesome. .

Further, as disclosed in Japanese Patent Publication No. 8-7306, the ferrule pressing member 107 is inserted into the pressing member fitting concave portion 103 from the compression direction of the spring 106 so that each locking portion 107a is locked to each locked portion. According to the method of engaging with the spring 101a, since the spring 106 is inserted while being compressed, there is a possibility that the spring 106 may be disassembled by the spring force during assembly and may not be assembled properly. After the assembly, the spring force of the compressed spring 106 becomes
The ferrule holding member 107 always acts in the detaching direction, and when used for a long time, the engaging portion between each locking portion 107a and the locked portion 101a cannot withstand the load. However, there is a fear that natural decomposition occurs.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an optical connector which can be easily assembled and which can effectively prevent spontaneous decomposition even when used for a long time.

[0011]

According to a first aspect of the present invention, there is provided a ferrule which is mounted on an end of an optical fiber and which is compressed from a natural length which urges the ferrule toward the distal end thereof. A connector body that has an accommodation recess that opens upward to accommodate the urging means whose length is changed to a state, and retains and retains the ferrule in a state where the tip of the ferrule projects from one wall of the accommodation recess. And a connector cover which is attached to the connector body by closing the opening of the housing recess from above, wherein the fixing pin for fixing the connector cover is attached to one of the connector cover and the connector body. One of the connector cover and the connector body is provided with a fixing hole protruding from one of the connector pins and the fixing pin is press-fitted therein. A holding groove portion for positioning and holding at a long position is provided in the connector body, and when the fixing pin is press-fitted into the fixing hole, the natural length of the urging means held in the holding groove portion is moved in the distal direction at a plurality of positions. When the fixing pin is pressed into the fixing hole,
A pressing portion for holding the biasing means in a compressed state is provided on the connector cover, and the distal end of the pressing portion is biased to the pressing portion.
A guide taper for pressing and guiding the means is formed and fixed.
When the pin is pressed into the fixing hole, the guide taper is
Positioning for positioning corresponding to the end of the biasing means
A guide portion is provided on the connector body .

The technical means of the second invention for achieving the above object is a ferrule attached to an end of an optical fiber and a length from a natural length for urging the ferrule toward the tip thereof to a compressed state. A connector body that has an accommodation recess that opens upward for accommodating the urging means for changing the position of the ferrule, and retains and retains the tip of the ferrule in a state where the tip of the ferrule projects from one wall of the accommodation recess; A connector cover mounted on the connector body by closing the opening of the recess from the upper side, wherein a fixing pin for fixing the connector cover protrudes from one of the connector cover and the connector body. And a fixing hole into which the fixing pin is press-fitted is provided in one of the connector cover and the connector body, and the fixing pin is inserted into the fixing hole. When inserted, the urging means having a natural length is pressed in the distal direction at a plurality of positions, and when the fixing pin is pressed into the fixing hole, the urging means holds the urging means in a compressed state. A positioning wall, which is provided on the connector cover and regulates movement of the urging means to both sides, is provided on the connector body,
A guide taper is formed at the end to press and guide the biasing means.
When the fixing pin is pressed into the fixing hole,
Guide taper is positioned to correspond to the end of the biasing means
Positioning guide part is provided on the connector body.
It is in the point.

Further, a technical means of the third invention for achieving the above object is to provide a ferrule attached to an end of an optical fiber and a length from a natural length for urging the ferrule toward its tip to a compressed state. A connector body that has an accommodation recess that opens upward for accommodating the urging means for changing the position of the ferrule, and retains and retains the tip of the ferrule in a state where the tip of the ferrule projects from one wall of the accommodation recess; A connector cover mounted on the connector body by closing the opening of the recess from the upper side, wherein a fixing pin for fixing the connector cover protrudes from one of the connector cover and the connector body. Along with
A fixing hole into which the fixing pin is press-fitted is provided in one of the connector cover and the connector body, and when the fixing pin is press-fitted into the fixing hole, the biasing means having a natural length moves in the distal direction at a plurality of positions. When the fixing pin is pressed into the fixing hole, the pressing portion is provided on the connector cover, and the pressing portion presses the pressing portion of the pressing portion. A support portion is provided on the connector body for abutting and supporting the surface on the opposite side to the side surface, and the urging means is provided at a tip end of the pressing portion.
A guide taper for pressing and guiding is formed, and the fixing pin is
When the guide taper is pressed into the fixing hole,
Positioning guide for positioning corresponding to the end of the biasing means
The connector part is provided on the connector body .

Further, a fourth invention for achieving the above object.
The technical means of a ferrule fitted at the end of an optical fiber
Length that biases the ferrule and the ferrule toward its tip
And a biasing means for changing the length to a compressed state.
A housing recess having an opening, and a wall portion on one side of the housing recess;
With the tip of the ferrule projected more
A connector body for holding, and the opening of the housing recess.
Connector that is closed from above and attached to the connector body
An optical connector having a connector cover.
Fixing pins for fixing the connector cover
Project from one of the connector bodies and
Insert the fixing holes into which the fixing pins are pressed into the connector cover.
Or the other end of the connector body.
When the spring is pressed into the fixing hole, the biasing means having a natural length is used.
Are pressed in the tip direction at a plurality of positions, and the fixing pin is
When pressed into the fixing hole, the urging means is in a compressed state.
A pressing portion to be held is provided on the connector cover,
Mounting of the ferrule, wherein the urging means is mounted in a cladding manner
The natural length of the biasing means is shorter than the length of the part,
The pressing portion has the same width as the outer diameter of the mounting portion of the ferrule.
The fixing pins are respectively provided with a gap, and the fixing pins are fixed.
When pressed into the hole, both sides are pressed by each pressing part
A displacement regulating guide for regulating the displacement of the biasing means.
In that each of the pressing portions is provided on each pressing portion.

[0015]

Further, prior Symbol guide taper for pressing guiding said urging means is formed at the tip portion of the pressing portion, when the fixing pin is press-fitted into the fixing hole, wherein the guide tapered end of said biasing means The connector body may be provided with a positioning guide portion for positioning to correspond to the portion.

[0017]

Further, the technical means of the fifth invention for achieving the above object is a ferrule attached to an end of an optical fiber and a natural length for urging the ferrule toward the tip thereof.
And a biasing means for changing the length of the ferrule to a compressed state. In an optical connector comprising: a connector body; and a connector cover mounted on the connector body by closing the opening of the housing recess from above, wherein a fixing pin for fixing the connector cover is provided on the connector cover or the connector body. While protruding on either one,
A fixing hole into which the fixing pin is press-fitted is provided in one of the connector cover and the connector body, and when the fixing pin is inserted and mounted from above along a vertical positioning guide portion provided in the connector body, a natural length The urging means includes a pressing body that is pressed in the distal direction at a plurality of positions and is held in a compressed state while being mounted and held on the connector body .
Outer diameter of the mounting part of the ferrule in which the means is mounted in the form of a jacket
With approximately the same width or slightly larger spacing as
A pair of pressing means for pressing the urging means connected to each other with
In that it has a pressure part .

Further, the pressing member fixing portion for fixing the pressing member is, the connector body or connector cover or connector to both the body and the connector cover, may have a structure consisting provided.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 7, an optical connector 1 is attached to an end of an optical fiber 2. FIG. Ferrule 3 and mounting part 3 at the rear of ferrule 3
(a), a spring 4 as a biasing means mounted on the outer periphery of the connector body a, a connector body 5 and a connector cover 6 for housing and holding the ferrule 3 and the spring 4
And a boot 8 attached to the connector housing 7.

At the front end side of the mounting portion 3a of the ferrule 3, a flange portion 3b having a larger diameter is provided. The length of the mounting portion 3a in the axial direction, that is, the length in the front-rear direction is the natural length of the spring 4. It is configured longer.

The spring 4 is a closed-end compression coil spring whose both ends in the axial direction are ground with a file or grinder so as to be flat with respect to a plane perpendicular to the axis.

The connector body 5 and the connector cover 6 are integrally formed of a synthetic resin, respectively, and the connector body 5 is provided with a housing recess 11 for housing the ferrule 3 and the spring 4.

On the front side of the front wall portion 12 on the front end side of the housing concave portion 11, a connection tube portion 13 for connecting the optical connector 1 to an adapter or the like is projected. The accommodation recess 11 is open on the upper side and the rear end side. The upper opening is closed by the connector cover 6, and the opening on the rear end side is closed by the boot 8.

In the accommodation recess 11, a positioning projection 14 in the front-rear direction and a fixing hole 1
5 is provided with a projection 16. Then, in the accommodation recess 11 thus formed, two sets of ferrules 3 and springs 4 are arranged side by side,
It is configured to be accommodated on both sides of the positioning projection 14 and the projection 16. At this time, the distal end of each ferrule 3 is configured to pass through the through-hole 12 a formed in the front wall portion 12 and the inside of the connection tube portion 13 and protrude from the front end portion of the connection tube portion 13.

As shown in FIG. 6, the left and right springs 4 are formed by the inner surfaces of the left and right side walls 17 and 18 forming the housing recess 11 and the side surfaces on both sides of the central positioning projection 14. Movement to both sides is regulated, where
These form a positioning wall that restricts the movement of the spring 4 to both sides.

Further, stepped portions 19 are formed on the inner surfaces of the side walls 17 and 18 so as to protrude inward from the upper end surface at a position advanced downward by the thickness of the connector cover 6, respectively. When the connector cover 6 is mounted on the connector body 5, the inner surface of the connector cover 6 abuts on the upper surface of each step 19, so that the entry of the connector cover 6 into the accommodation recess 11 is regulated. I have.

The connector body 5 has three fixing holes 15, 21, 22 for fixing the connector cover 6.
Is provided. Of these, the fixing hole 15 is
1 is provided at the projecting portion 16 projecting upward from the bottom wall portion 23 at a position slightly rearward from the center, and fixing holes 21 and 22 are provided at the left and right side wall portions 17 and 18. It is provided on the front end side of the stepped portion 19.

Further, a lever lock 24 is provided on the bottom wall 23 of the connector body 5 for maintaining the connection state when the optical connector 1 is connected to an adapter or the like. The lever lock 24 extends in a cantilever manner in the front end direction, and is configured to be elastically deformable.

As shown in FIG. 5, concave holding grooves 25 are respectively formed in portions corresponding to the mounting positions of the respective springs 4 on the upper surface side of the bottom wall 23, and each holding groove 25 is formed.
Is formed longer in the front-rear direction than the natural length of the spring 4. Each spring 4 is configured to be positioned and held in the holding groove 25 with a natural length.

On the other hand, the connector cover 6 has such an outer shape that it fits exactly into the opening above the housing recess 11 of the connector body 5, and has three fixing pins 26, 27, 28 and a positioning projection 30 are provided.

The three fixing pins 26, 27, 28
Are formed in a substantially cylindrical shape having a slightly tapered taper, and are provided at positions corresponding to the fixing holes 15, 21, 22 provided at three places of the connector body 5, respectively.
The connector covers 6 are fixed to the connector body 5 by press-fitting the fixing pins 15, 21, 22 into the corresponding fixing holes 26, 27, 28, respectively.

The positioning projection 30 is provided at a position facing the positioning projection 14 of the connector body 5. When the connector cover 6 is mounted on the connector body 5, the lower end surface of the positioning projection 30 is positioned. It is configured to abut the upper end surface of the projection 14 to close the gap in the lever lock 24 portion.

The right and left ends of the inner surface of the connector cover 6 at the intermediate portion in the front-rear direction and the positioning protrusions 30 are also provided.
Each of the spring pressing portions 32 is formed with a projection taper 32a at the end thereof.

As shown in FIG. 6, a pair of right and left spring pressing portions 32 are provided for each of the springs 4 so as to press each of the springs 4 at a plurality of positions. The corresponding pair of spring pressing portions 32 are provided with a width substantially equal to or slightly larger than the outer diameter of the mounting portion 3 a of the ferrule 3.

On the other hand, the side wall portions 17 on the connector body 5 side corresponding to the respective spring pressing portions 32 on both right and left end portions,
A pressing portion fitting groove 33 is formed on the inner surface side of the spring pressing portion 32 as a positioning guide portion into which the outer portion of the spring pressing portion 32 is fitted and guided. Further, an upper end portion on the rear surface side of the pressing portion fitting groove 33 is formed as an insertion guide 33a which is gradually inclined rearward.

When the fixing pins 26, 27, 28 are press-fitted into the fixing holes 15, 21, 22, respectively, the fixing pins 2
The insertion guide 33a guides the spring pressing portion 32 to a predetermined position so that the fixing holes 15, 21, 22 and the fixing holes 15, 21, 22 coincide with each other.

Each of the spring pressing portions 32 is fitted into the pressing portion fitting groove 33, so that each guide taper 32a is formed.
The position is set to a position corresponding to the rear end of the spring 4 positioned and held in the holding groove 25 with a natural length, and each spring 4 housed in each holding groove 25 of the housing recess 11 by each guide taper 32a gradually moves forward. It is configured to be pressed and guided, and finally to be held by the spring pressing portion 32 in a compressed state.

The boot 8 is fitted over the optical fiber 2 and has a wide end at the connector housing 7 side and a gradually narrow width toward the other end so as to close the opening at the rear end side of the accommodation recess 11. It is formed in a substantially triangular shape in a plan view and is formed of, for example, a vinyl chloride elastomer to have a flexible structure.

A plurality of ridges 8a are formed on the outer peripheral surface of the boot 8 so as to be spaced apart in the front-rear direction.
As shown also in the cross-sectional view, the thickness of the connector housing 7 side is relatively thicker than the middle part in the front-rear direction, and the thickness of the opposite narrow end is thinner. In particular, the narrow side end edge is formed extremely thin. here,
The connector housing 7 is harder to bend than the middle part of the boot 8, and the other end is easily bent.

Further, the connector housing 7 of the boot 8
At the side end, a rectangular tube-shaped insertion locking portion 8b inserted into the connector housing 7 is provided so as to protrude forward.

The present embodiment is configured as described above. The ferrule 3 and the spring 4 attached to the end of the optical fiber 2 are attached to the connector body 5 as shown in FIG. The spring 4 is inserted into the accommodation recess 11, and the distal end of the ferrule 3 is made to protrude from the front end of the connection cylinder 13 through the through-hole 12 a provided in the front wall 12 and the connection cylinder 13. , By holding the spring 4 in the holding groove 25.

When the ferrule 3 and the spring 4 are mounted, the connector cover 6 is mounted on the connector body 5 from above as shown in FIGS. By mounting the connector cover 6, the mounting portion 3 of the ferrule 3 is mounted.
The spring 4 fitted in a is compressed by the flange portion 3b of the ferrule 3 and the spring pressing portion 32,
The resilient force urges the ferrule 3 toward the distal end thereof.

The fixing pins 26, 27, 28 are press-fitted into the fixing holes 15, 21, 22, and the connector cover 6 is assembled to the connector body 5.

Further, as shown in FIG. 7, the insertion locking portion 8b of the boot 8 is inserted into the rear end side opening of the accommodation recess 11, and
Installing. Here, the optical connector 1 is assembled.

As described above, each fixing pin 26, 27, 2
The connector cover 6 is fixed to the connector body 5 by press-fitting the optical connector 8 into the fixing holes 15, 21, and 22. No screws or the like are required for fixing, the number of parts is reduced, and the optical connector 1 is assembled. Work can be performed easily and quickly. At this time, since the insertion amount of the connector cover 6 is regulated by the step portion 19 of the connector body 6, it is possible to effectively prevent the optical connector 1 from being damaged due to excessive press-fitting at the time of assembling. The connector cover 6 can be fixed to the connector body 5 at the position.

Each of the fixing pins 26, 27, and 28 is fixed to each of the fixing holes 15, 21, and 22 by the insertion guide 33a of each of the pressing portion fitting grooves 33 for guiding each of the spring pressing portions 32.
Since the guide is performed so as to coincide with the position, the assembling work can be further facilitated. Moreover, each spring pressing portion 32 has a structure which also serves as a pressing operation member of the spring 4 and a guide for insertion, so that the structure can be simplified.

Further, when assembling the connector cover 6 to the connector body 5, each spring pressing portion 32 provided on the connector cover 6 presses two positions of each spring 4 located on both sides of the mounting portion 3a of the ferrule 3 respectively. Thereafter, each spring 4 is held in a compressed state by each spring pressing portion 32. Since each spring 4 is held at two positions on both sides thereof, the spring 4 can be held well.

Further, since the guide taper 32a is formed at the tip of each spring pressing portion 32, when each spring 4 is pressed by each spring pressing portion 32, each spring 4 can be smoothly compressed. In addition, since each spring 4 has a closed end ground so that its end is flat, the guide taper 3
The relative movement between 2a and the end of the spring 4 is made smooth,
The compression operation is performed more smoothly.

Further, the structure is such that the rear surface side of each spring pressing portion 32 is supported by the rear surface 33b side as a supporting portion constituting the pressing portion fitting groove 33, and the deformation of each spring pressing portion 32 is caused by long-term use. Can be effectively prevented, and the elastic urging function of the spring 4 for urging the ferrule 3 in a predetermined direction can be favorably maintained.

The mounting direction of the connector cover 6 to the connector body 5 and the flange 3a of the ferrule 3
Since the biasing direction of the spring 4 held in a compressed state is different between the spring pressing portion 32 and the spring pressing portion 32, spontaneous decomposition due to long-term use can be effectively prevented.

When assembling, the connector body 5
The structure is such that each spring 4 is positioned and held in a natural length in each holding groove 25. Compared with the case where the spring is positioned and held in a compressed state in advance, the spring 4 is more careless when the connector cover 6 is assembled. And the connector cover 6 can be easily assembled.

Further, each spring 4 is connected to each holding groove 25.
, And the movement to both sides is restricted by the left and right side wall portions 17 and 18 and the positioning projections 14, so that each spring 4 can be easily and accurately accommodated in a predetermined position. Even during the compression operation, the displacement can be effectively prevented.

Since the length of the mounting portion 3a of the ferrule 3 is longer than the natural length of the spring 4, even when the ferrule 3 is moved backward against the elastic force of the spring 4, The rear end of ferrule 3 is spring 4
The ferrule 3 is smoothly moved without being caught on the surface.

Further, the structure is such that the gap is closed by the positioning projections 14 and the positioning projections 30 provided on the connector body 5 and the connector cover 6, respectively, and effectively prevents dust and the like from entering the inside of the connector housing 7. be able to.

Further, since the boot 8 is made of an elastomer having flexibility, the connector housing 7 side is made thicker than the middle part and the other end side is made thinner, the bending position of the optical fiber 2 is restricted. The bending of the optical fiber 2 near the ferrule 3 can be effectively prevented.
Can be effectively protected. In addition, since the other end terminal edge portion is configured to be thinner, the optical fiber 2 near the outlet of the boot 8 can be used.
Of the optical fiber 2 can be effectively prevented, and the optical fiber 2 can be protected.

[0057] FIGS. 8 and 9 show the second embodiment, the same components as the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the present embodiment, each spring pressing portion 32 is displaced when the spring 4 is compressed so that the axis of the ferrule 3 and the axis of the spring 4 can be arranged concentrically. Are respectively provided to protrude.

Therefore, when assembling the connector cover 6 to the connector body 5, the spring 4 can always be assembled in a stable state, and the mutual axial center displacement between the ferrule 3 and the spring 4 can be effectively prevented. Here, it is possible to effectively prevent the occurrence of deviation of the axial accuracy of the ferrule 3 in the optical connector 1.

FIGS. 10 to 16 show a third embodiment, in which the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

That is, in each of the first and second embodiments, each spring pressing portion 32 has a structure provided integrally with the connector cover 6.
The difference is that the spring pressing portion 32 is separate from the connector cover 6.

A pair of spring pressing portions 32 are provided corresponding to the respective springs 4. The pair of spring pressing portions 32 are connected to each other by a connecting portion 32c, and the pair of spring pressing portions 32 are provided. Are connected to each other by a connecting portion 32d. Here, a pressing body that presses the spring 4 is constituted by the spring pressing portions 32, the connecting portions 32c, and the connecting portions 32d.

The connecting portion 32 of the connector cover 6
In a portion corresponding to d, a fixing groove 34 is provided as a pressing body fixing portion into which the connecting portion 32d is fitted.

Further, a plurality of recesses 35a, 35b, 35c are formed on the upper and lower sides of the insertion locking portion 8b of the boot 8 in the left-right direction, respectively. In this case, the central recess 35b is a through hole penetrating vertically.

On the other hand, the rear edge of the bottom wall 23 of the connector body 5 and the rear edge of the inner side of the connector cover 6 corresponding to the position where the insertion locking portion 8b of the boot 8 of the connector housing 7 is inserted. , The concave portions 35a, 35b, 35
c, a plurality of locking projections 36 are provided in the left-right direction.
a, 36b, 36c, 37a, 37b, 37c protrude. The central locking projection 37b on the connector cover 6 side corresponding to the central recess 35b is a penetrating projection projecting longer than the locking projections 37a and 37c on both sides thereof.
When the connector cover 6 is attached to the connector body 5, the connector cover 6 is configured to penetrate through the central recess 35 b of the boot 8 and abut on the protruding end surface of the locking projection 36 b at the center of the connector body 5.

The long projecting locking projection 37b
Is formed in a tapered shape that becomes gradually thinner in the direction of the protruding end so as to easily penetrate the recess 35b.

The present embodiment is configured as described above, and the ferrule 3 and the spring 4 mounted on the end of the optical fiber 2 are mounted on the connector body 5 in the same manner as described above. The ferrule 3 is inserted into the recess 11 so that the distal end of the ferrule 3 projects from the front end of the connecting cylinder 13 through the through-hole 12 a provided in the front wall 12 and the connecting cylinder 13. This is performed by holding the holding groove 25.

When the ferrule 3 and the spring 4 are mounted, each spring pressing portion 32 of the pressing body is inserted along each pressing portion fitting groove 33 of the connector body 5. As described above, the spring 4 loosely fitted on the outer periphery of the ferrule 3 by the insertion of each spring pressing portion 32 of the pressing body, the flange 3a formed on the outer periphery of the ferrule 3,
The compressed state is established by the spring pressing portion 32. And
The ferrule 3 is urged toward its distal end by the elastic force of the spring 4 in a compressed state. At this time, the pressing body is held by the pressing portion fitting groove 33.

After that, the connector cover 6 is mounted on the connector body 5. At this time, the recesses 35a, 35b, 35c on the lower surface side of the boot 8 are fitted and locked to the locking projections 36a, 36b, 36c of the connector body 5. By attaching the connector cover 6, each of the fixing pins 26, 2
7 and 28 are press-fitted into the fixing holes 15, 21 and 22, and the locking projections 37a, 37b and 37c are fitted and locked in the recesses 35a, 35b and 35c on the upper surface side of the boot 8, and the pressing body The release path from the pressing portion fitting groove 33 is closed, and the optical connector 1 is assembled here.

At this time, the connecting portion 32d is fitted in the fixing groove 34, and the movement of each spring pressing portion 32 at the center is regulated.

Therefore, also in this embodiment, as in the first embodiment, advantages such as the assembling work of the optical connector 1 can be performed easily and quickly, and natural decomposition due to long-term use can be effectively prevented. There is.

Further, a pressing body composed of each spring pressing portion 32 is inserted so as to be pressed down from above along each pressing portion fitting groove 33 to displace and fix each spring 4. The pressing body can be inserted without displacement and each spring pressing part 32 can be inserted into each pressing part fitting groove 33 of the connector body 5 in the compressed state of the spring 4.
, And so-called temporarily fixed, so that the subsequent assembly of the connector cover 6 is also facilitated.

Further, the pressing body can be prevented from being detached by the connector cover 6, and the connecting part 32d is fixed in a state fitted in the fixing groove 34, so that the pressing body is firmly fixed.

Each locking projection 3 on the connector body 5 side
When the connector cover 6 is attached to the connector body 5 in a state where the recesses 35a, 35b, 35c on the lower surface side of the insertion locking portion 8b of the boot 8 are fitted and locked to the connector covers 6a, 36b, 36c. Of the locking projections 37a, 37b,
37c are the concave portions 35a, 35 on the upper surface side of the insertion locking portion 8b.
b, 35c, and the boot 8 is engaged with the upper and lower locking projections 36a, 36b, 36c, 37a, 37b, 37c and the recesses 35a, 35b, 35c. Since it is retained and locked by the connector housing 7,
The boot 8 can be easily attached. At this time, the upper and lower locking projections 36a, 36b, 36c, 37a, 37b, 37
c and the concave portions 35a, 35b, 35c are fitted and locked, respectively, and the so-called convex portions located between the concave portions 35a, 35b, 35c function as reinforcing ribs, and are connected well with a pulling force. There is an advantage that can exert power.

Further, the central concave portion 35b on the boot 8 side is a through hole, and the corresponding central locking projection 37b on the connector cover 6 side is a long penetrating projection penetrating the concave portion 35b. The bonding force between the housing 7 and the boot 8 becomes stronger, and the detachment of the boot 8 can be more reliably prevented.

In this embodiment, the structure in which the fixing groove 34 for fixing the pressing body is provided on the connector cover 6 side is shown, but a structure in which the pressing body fixing portion is provided on the connector body 5 side may be used. May have a structure in which the pressing body fixing portions are provided on both the connector body 5 and the connector cover 6.

In each of the embodiments of the present invention, the connector cover 6 is provided with the fixing pins 26, 27 and 28, and the connector body 5 is provided with the fixing holes 15, 21 and 22. Conversely, the connector cover 6 may be provided with a fixing hole and the connector body 5 may be provided with a fixing pin.

Further, the structure in which the boot 8 is provided as a separate body is shown. However, the structure may be integral with the connector body 5 side, or may be a structure without the boot 8.

[0079]

As described above, according to the optical connector of the present invention, the fixing pin for fixing the connector cover is projected from either the connector cover or the connector body and the fixing hole into which the fixing pin is press-fitted. Is provided on the other of the connector cover and the connector body, and a holding groove for positioning and holding the urging means with a natural length is provided on the connector body. When the fixing pin is pressed into the fixing hole, the holding groove is held in the holding groove. When the urging means having a natural length is pressed in the distal direction at a plurality of positions and the fixing pin is pressed into the fixing hole, a pressing portion for holding the urging means in a compressed state is provided on the connector cover. Guide the urging means to the part
A guide taper is formed, and the fixing pin is pressed into the fixing hole.
When the guide taper is positioned to correspond to the end of the biasing means.
A positioning guide is provided on the connector body.
Since the biasing means is positioned and held in the holding groove with its natural length, it is possible to prevent unintentional detachment during assembly, and to facilitate the optical connector by pressing each fixing pin into each fixing hole. Can be assembled to facilitate the assembling work, can effectively prevent spontaneous decomposition even when used for a long time, and is a method of pressing and holding the urging means at a plurality of positions, There is an advantage that the urging means can be favorably held. Moreover,
When the fixing pin is pressed into the fixing hole, the guide taper is urged.
Positioning guide for positioning corresponding to the end of the means
Is provided on the connector body, making the work more circular.
The advantage is that it can be performed smoothly and the assembly work can be made easier.
is there.

A fixing pin for fixing the connector cover is protruded from one of the connector cover and the connector body, and a fixing hole for press-fitting the fixing pin is formed on the other of the connector cover and the connector body.
When the fixing pin is pressed into the fixing hole, the natural length urging means is pressed in the distal direction at a plurality of positions. When the fixing pin is pressed into the fixing hole, the urging means is held in a compressed state. Is provided on the connector cover, and a positioning wall for restricting the urging means from moving to both sides is provided on the connector body.
An id taper is formed and the fixing pin is pressed into the fixing hole
The guide taper so that it corresponds to the end of the biasing means.
Positioning connector is provided on the connector body.
With this structure, the optical connector can be easily assembled by pressing each fixing pin into each fixing hole.
In addition to facilitating assembling work, spontaneous decomposition can be effectively prevented even when used for a long time, and the urging means is pressed and held at a plurality of positions. There is the advantage that the lateral displacement can be effectively prevented even when the urging means is compressed. Also, the fixing pin is pressed into the fixing hole.
The guide taper is positioned to correspond to the end of the biasing means.
Positioning guides for positioning are provided on the connector body.
Work can be done more smoothly,
There is an advantage that simplification can be achieved.

Further, a fixing pin for fixing the connector cover protrudes from one of the connector cover and the connector body, and a fixing hole into which the fixing pin is press-fitted is provided on the other of the connector cover and the connector body. When the pin is pressed into the fixing hole, the natural-length urging means is pressed in the distal direction at a plurality of positions, and when the fixing pin is pressed into the fixing hole, the urging means holds the urging means in a compressed state. A support portion is provided on the connector cover, and a support portion is provided on the connector body for abutting against and supporting the surface of the pressing portion that presses the biasing means on the side opposite to the pressing portion.
Guide taper for pressing and guiding the urging means is formed and fixed
When the pin is pressed into the fixing hole, the guide taper
The positioning guide that positions to correspond to the end of
With the structure provided in the connector body, the optical connector can be easily assembled by press-fitting each fixing pin into each fixing hole, so that the assembling work can be facilitated and when the optical connector is used for a long time. This method effectively prevents spontaneous decomposition and presses and holds the urging means at multiple positions.The urging means can be held well, and the deformation of the pressing part is effective even after long-term use. This has the advantage that the elastic urging function of the urging means can be favorably maintained. Also, the fixing pin is
Guide taper corresponds to the end of the biasing means when pressed into
Positioning guide part for positioning is connector body
The work can be performed more smoothly because
There is an advantage that the work can be made easier.

[0082]

Further, fixing pins for fixing the connector cover
The connector cover or the connector body
And a fixing hole into which the fixing pin is press-fitted.
Connector cover or connector body.
When the fixing pin is pressed into the fixing hole,
The step is pressed in the tip direction at multiple positions, and the fixing pin is
The pressing means keeps the biasing means in a compressed state when pressed into
Part is provided on the connector cover, and the urging means is
Depending on the length of the ferrule to be worn,
The length is short and the pressing part is outside the ferrule mounting part.
Each is provided with an interval of the same width as the diameter, and the fixing pin is
When pressed into the fixing hole, both sides are pressed by each pressing part
Misalignment guide that regulates the misalignment of the biasing means
If a structure is provided in which each pressing part is provided on each pressing part,
Pressing each fixing pin into each fixing hole allows the optical connector
Can be easily assembled, facilitating assembly work.
Not only can it be used for a long time,
Disassembly can be effectively prevented, and biasing means can be
It is a method of pressing and holding, and the biasing means is satisfactorily
Can be held, and the position of the biasing means is always stable
Can be assembled with the ferrule and the biasing means.
The misalignment of the axes can be effectively prevented,
The deviation of the axis accuracy of the ferrule can be effectively prevented,
There is an advantage that the movement of the rules can be performed smoothly .

Further, the urging means is provided at the tip of the pressing portion.
A guide taper is formed to press and guide the fixing pin.
Is pressed into the fixing hole, the guide taper is
Positioning guide for positioning to correspond to the end of the biasing means
And the connector part is provided on the connector body.
Work can be done more smoothly and assembly work can be made easier.
There is an advantage that it is.

[0085]

Further , a fixing pin for fixing the connector cover protrudes from one of the connector cover and the connector body, and a fixing hole into which the fixing pin is press-fitted is provided on either the connector cover or the connector body. When inserted and mounted from above along the vertical positioning guides provided on the body, the natural-length biasing means is pressed in the distal direction at a plurality of positions, and is biased while being mounted and held on the connector body. The pressing means is provided with a pressing body which is held in a compressed state, and the pressing body is provided with a biasing means fitted in a sleeve shape.
Almost the same width as the outer diameter of the mounting part of the ferrule
With a large gap between the two
With the structure including the pair of pressing portions for pressing the urging means , as described above, the assembling work can be facilitated, and spontaneous decomposition can be effectively prevented even when used for a long time. This is a method in which the urging means is pressed and held at the position, and has an advantage that the urging means can be favorably held.

Further, if the pressing body fixing portion for fixing the pressing body is provided on the connector body, the connector cover, or both the connector body and the connector cover, the fixing of the pressing body is firmly performed. It has the advantage of being done.

[Brief description of the drawings]

1 is an exploded perspective view showing a first embodiment.

FIG. 2 is a perspective view showing an assembled state of the optical connector.

FIG. 3 is a perspective view of a connector body.

FIG. 4 is a perspective view of a connector cover.

FIG. 5 is an explanatory sectional view showing an assembling step.

FIG. 6 is an explanatory sectional view showing an assembling step.

FIG. 7 is an explanatory sectional view showing an assembling step.

FIG. 8 is a perspective view of a connector cover according to a second embodiment.

FIG. 9 is an explanatory sectional view showing an assembling step.

FIG. 10 is an exploded perspective view showing a third embodiment.

FIG. 11 is a perspective view of a pressing body.

FIG. 12 is a perspective view of a connector body.

FIG. 13 is a plan view of the boot.

FIG. 14 is a side view of the boot.

15 is a sectional view taken along the line XV-XV in FIG.

FIG. 16 is a sectional view taken along line XVI-XVI of FIG. 14;

FIG. 17 is an exploded perspective view of a main part showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 optical connector 2 optical fiber 3 ferrule 3a mounting portion 4 spring 5 connector body 6 connector cover 11 receiving recess 12 front wall portion 14 positioning protrusion 15 fixing hole 17 side wall portion 18 side wall portion 21 fixing hole 22 fixing hole 25 holding groove portion 26 fixing Pin 27 Fixing pin 28 Fixing pin 32 Spring pressing portion 32a Guide taper 32b Displacement regulating guide 33 Pressing portion fitting groove 33a Insertion guide 33b Rear surface 34 Fixing groove

Continuation of front page (72) Inventor Kazuki Sogabe 1-3-1 Shimaya, Konohana-ku, Osaka City Within Sumitomo Electric Industries, Ltd. (56) References JP-A-5-224090 (JP, A) JP-A-8-179163 (JP, A) Japanese Utility Model Hei 5-21214 (JP, U) Japanese Utility Model Application Showa 60-84910 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 6/24-6 / 26 G02B 6/30-6/43

Claims (7)

(57) [Claims] An upwardly-opening accommodation recess for accommodating a ferrule attached to an end of an optical fiber and an urging means for changing the length of the ferrule from its natural length to a compressed state for urging the ferrule in the distal direction. A connector body that retains and retains the ferrule in a state where the tip of the ferrule projects from one wall of the housing recess, and the opening of the housing recess is closed from above and attached to the connector body. An optical connector comprising: a connector cover; and a fixing pin for fixing the connector cover protruding from one of the connector cover and the connector body, and a fixing hole into which the fixing pin is press-fitted. Alternatively, the connector body is provided with a holding groove for positioning and holding the urging means at a natural length. In both cases, when the fixing pin is press-fitted into the fixing hole, the natural-length urging means held in the holding groove is pressed toward the distal end at a plurality of positions, and the fixing pin is press-fitted into the fixing hole. In this case, a pressing portion for holding the urging means in a compressed state is provided on the connector cover, and a guide for pressing and guiding the urging means to a distal end portion of the pressing portion.
The fixing pin is pressed into the fixing hole.
When the guide taper is in contact with the end of the biasing means,
The positioning guide for positioning the connector
An optical connector characterized by being provided on a body . 2. An upwardly-opening accommodation recess for accommodating a ferrule attached to an end of an optical fiber and an urging means for changing the length of the ferrule from its natural length to a compressed state for urging the ferrule in the distal direction. A connector body that retains and retains the ferrule in a state where the tip of the ferrule projects from one wall of the housing recess, and the opening of the housing recess is closed from above and attached to the connector body. An optical connector comprising: a connector cover; and a fixing pin for fixing the connector cover protruding from one of the connector cover and the connector body, and a fixing hole into which the fixing pin is press-fitted. Alternatively, when the fixing pin is press-fitted into the fixing hole, the urging means having a natural length may be provided at a plurality of positions and the tip may be provided at one of the other ends of the connector body. When the fixing pin is pressed in the fixing hole into the fixing hole, the urging unit is provided with a pressing portion for holding the urging unit in a compressed state, and the urging unit is moved to both sides. A positioning wall for regulating the pressure is provided on the connector body, and a guide for pressing and guiding the urging means at a tip end of the pressing portion.
The fixing pin is pressed into the fixing hole.
When the guide taper is in contact with the end of the biasing means,
The positioning guide for positioning the connector
An optical connector characterized by being provided on a body . 3. An upwardly-opening accommodation recess for accommodating a ferrule attached to an end of an optical fiber and an urging means for changing the length of the ferrule from its natural length to a compressed state in the compressed state. A connector body that retains and retains the ferrule in a state where the tip of the ferrule projects from one wall of the housing recess, and the opening of the housing recess is closed from above and attached to the connector body. An optical connector comprising: a connector cover; and a fixing pin for fixing the connector cover protruding from one of the connector cover and the connector body, and a fixing hole into which the fixing pin is press-fitted. Alternatively, when the fixing pin is press-fitted into the fixing hole, the urging means having a natural length may be provided at a plurality of positions and the tip may be provided at one of the other ends of the connector body. When the fixing pin is pressed into the fixing hole by pressing in the direction, a pressing portion for holding the urging means in a compressed state is provided on the connector cover, and the urging means of the pressing portion presses the urging means. A support portion is provided on the connector body for abutting and supporting the surface on the side opposite to the side to be pressed, and a guide for pressing and guiding the urging means to the tip of the pressing portion.
The fixing pin is pressed into the fixing hole.
When the guide taper is in contact with the end of the biasing means,
The positioning guide for positioning the connector
An optical connector characterized by being provided on a body . 4. An upwardly-opening accommodation recess for accommodating a ferrule attached to an end of an optical fiber and an urging means for changing the length of the ferrule from its natural length to a compressed state for urging the ferrule in the distal direction. A connector body that retains and retains the ferrule in a state where the tip of the ferrule projects from one wall of the housing recess, and the opening of the housing recess is closed from above and attached to the connector body. An optical connector comprising: a connector cover; and a fixing pin for fixing the connector cover protruding from one of the connector cover and the connector body, and a fixing hole into which the fixing pin is press-fitted. Alternatively, when the fixing pin is press-fitted into the fixing hole, the urging means having a natural length may be provided at a plurality of positions and the tip may be provided at one of the other ends of the connector body. When the fixing pin is pressed in the fixing hole into the fixing hole, the urging means is provided in the connector cover with the urging means being held in a compressed state. The natural length of the biasing means is configured to be shorter than the length of the mounting portion of the ferrule, and the pressing portions are provided at intervals having the same width as the outer diameter of the mounting portion of the ferrule, and the fixing pin is provided. Wherein each of the pressing portions is provided with a misregistration regulating guide which regulates a misalignment of the urging means whose both sides are pressed by each of the pressing portions when the pressing portion is press-fitted into the fixing hole. connector. 5. The pressing means is pressed against the tip of the pressing portion.
A guide taper for pressure guidance is formed, and the fixing pin is
When the guide taper is pressed into the fixing hole,
Positioning guide for positioning corresponding to the end of the means
Is provided on the connector body.
The optical connector according to claim 4 . 6. A ferrule mounted on an end of an optical fiber.
From the natural length that urges the ferrule and the ferrule toward its tip.
Upwardly open to accommodate biasing means for changing the length to a compressed state.
The housing recess has an opening, and a wall on one side of the housing recess.
With the tip of the ferrule projected.
Holding the connector body and the opening of the accommodation recess upward.
Connector that is closed from one side and attached to the connector body
And a fixing pin for fixing the connector cover.
When protruding from either the bar or the connector body
In both cases, the fixing hole into which the fixing pin is
A positioning guide provided on the other of the cover and the connector body, and provided on the connector body.
When the insertion is mounted Ri by upward along the id portion, prior to the natural length
The urging means is pressed in the tip direction at a plurality of positions,
The urging means is mounted and held on the connector body.
Comprises a pressing body which is held in a compressed state, wherein the pressing body is provided with
Almost the same width or slightly larger than the outer diameter of the ferrule mounting part
Biasing hands connected to each other at a connecting portion
Characterized by comprising a pair of pressing portions for pressing the step
Optical connector. 7. A pressing body fixing portion for fixing the pressing body,
The connector body or connector cover, or
It is not provided on both the connector body and the connector cover.
7. The optical connector according to claim 6, wherein: