JP4638962B2 - Optical connector with shutter - Google Patents

Description

  The present invention relates to an optical connector with a shutter.

In recent years, with the spread of FTTH (Fiber To The Home), optical communication networks in condominiums and office buildings have been developed. Various types of optical connectors with shutters have been developed because workers unaccustomed to handling optical connectors may directly look at the laser beam when switching the connection of these premises wirings with the optical connector.
JP 2006-195355 A

  A conventional optical connector with a shutter is based on an SC type optical connector.

  That is, it is composed of a combined body of a plug frame and a stop ring, and an optical ferrule fixing part that accommodates an optical ferrule therein, a front housing that is slidably mounted outside the optical ferrule fixing part, and a front housing It comprises a rear housing mounted on the outside, and includes shutter means made of a metal leaf spring that opens and closes the optical path of light emitted from the optical ferrule.

  Between the front housing and the outer peripheral flange formed at the rear end of the stop ring, a small-diameter spring that urges the front housing toward the connection direction with respect to the stop ring is inserted. One end of the spring is abutted against the side surface of the outer peripheral flange.

  However, since the spring for pushing out the front housing has a small diameter and a long length, there is a problem that the position of the abutting portion between the spring and the side surface of the outer peripheral flange is not stable when assembling the above parts.

  If the position of the abutting portion is not stable, a prescribed spring pressure cannot be obtained, resulting in an assembly failure. For this reason, the assembly requires very skill and the work efficiency is greatly reduced.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an optical connector with a shutter that can be easily assembled regardless of the level of skill of an operator.

In order to solve the above-described problems, the present invention provides an optical ferrule fixing portion that is a combined body of a plug frame and a stop ring, a front housing that is slidably mounted on the outside of the optical ferrule fixing portion, An optical connector with a shutter comprising a rear housing attached to the shutter and for opening and closing an optical path of light emitted from the optical ferrule, between the front housing and an outer peripheral flange of the stop ring. Is inserted with a small-diameter spring that urges the stop housing in a direction to push out the front housing, and the spring is housed in a spring guide formed on a side surface of the front housing, The spring receiving portion of the outer peripheral flange has the sp And the locking portion is provided for locking one end of ring, the locking portion is formed in the receiving portion Ri one end insertable notch Kidea of the spring, the restriction pin penetrating the spring further wherein the regulating pin, having a head portion inserted into the notch portion one end of said fixed in abutment on one end and the spring of the spring Rukoto, with shutters light, wherein It is a connector.

In addition the shutter optical connector with the spring guide may be a hole for housing the spring.

  According to the present invention, since the position of the small-diameter spring inserted between the front housing and the stop ring is stabilized, the light that can be easily assembled regardless of the skill level of the operator. A connector is provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The basic configuration of the present invention includes an optical ferrule fixing portion having a built-in optical ferrule, and a coupling portion with an optical adapter housing mounted on the outside of the optical ferrule fixing portion so as to be movable with respect to the optical ferrule fixing portion. A front housing, a rear housing mounted outside the front housing, and shutter means for opening and closing an optical path of light.

  In the following embodiments, a case where the present invention is applied to a mechanically spliced field assembly type optical connector is described. However, the present invention is not limited to a field assembly type optical connector.

FIG. 1 is a perspective view showing a state immediately after assembly of an optical connector according to the present invention (hereinafter simply referred to as “optical connector”), and FIG. 2 is a cross-sectional view of FIG. 1 and includes a line AA ′. FIG. 3 is a partial bottom view showing the optical connector of FIG. 1.
In addition, let the connection direction of an optical connector be the front, and let the opposite direction be a back.

  As shown in FIGS. 1 and 2, the optical connector 100 includes an optical ferrule fixing portion 10 that fixes an optical ferrule 1 with a mechanical splice (such as an SC type optical ferrule), and a front housing 20 that houses the optical ferrule fixing portion 10. A light-shielding metal leaf spring member 30 that opens and closes an optical path of light emitted from the built-in optical fiber 3 built in the optical ferrule 1, and a cylindrical rear housing 40 mounted outside the front housing 20. And. 1 and 2 show the optical connector 100 after assembling into an optical fiber cable, and a boot 50 is put between the optical ferrule fixing portion 10 of the optical connector 100 and the optical fiber cable F. FIG.

  The optical ferrule 1 and the optical ferrule fixing part 10 will be described with reference to FIGS. 2 and 4 to 6. 4 is a cross-sectional view of the optical ferrule fixing portion in the optical connector of FIG. 1, and is a cross-sectional view in the longitudinal direction including the line AA ′ of FIG. 1. FIG. FIG. 6 is a cross-sectional view in a direction perpendicular to the optical axis of the built-in optical fiber 3 of the optical ferrule fixing unit 10.

  As shown in FIG. 4, the built-in optical fiber 3 connected to the optical ferrule 1 is a single bare optical fiber, and includes a fixed portion 3 a built in the optical ferrule 1 and an extension extending from the optical ferrule 1. It is comprised with the part 3b. One end surface of the fixed portion 3 a is polished with high precision together with the tip surface of the optical ferrule 1.

  As shown in FIGS. 2, 4, and 6, the optical ferrule fixing part 10 is a combined body of a plug frame 14 and a stop ring 13, and the optical ferrule 1 with a mechanical splice is accommodated inside the main body.

  An optical ferrule 1 with a mechanical splice (hereinafter sometimes simply referred to as “optical ferrule 1”) has an end face of the extension portion 3b and an end face of the insertion optical fiber 4 of the optical fiber 3 with a built-in ferrule abut each other. It has a connection mechanism that is fixed in a state.

  More specifically, the mechanical splice (also referred to as an optical connector) is an extension portion of a built-in optical fiber on the surface of a positioning base extending from a resin optical ferrule flange 11 (hereinafter referred to as an optical ferrule flange) at the rear end of the optical ferrule 1. 3b is arranged, and the connection portion between the end of the built-in optical fiber and the end of the insertion optical fiber is pressed with a separate holding lid and fixed with a C spring or the like.

  Hereinafter, the combination of the positioning base and lid of the mechanical splice will be referred to as a pair of fiber clamping portions 12a (positioning base) and 12b (pressing lid). More specifically, the fiber holding portion 12a is a resin-integrated molded product with the optical ferrule flange 11 and has a substantially semicircular cross section. The fiber holding surface 12c has an extension portion 3b of the built-in optical fiber 3 and a built-in optical fiber. A positioning groove (V-groove) 12d for aligning the insertion optical fiber 4 abutted against 3 is formed.

  A through hole 11a is formed in the optical ferrule flange 11, and the extending portion 3b of the built-in optical fiber 3 passes through the through hole 11a, and a positioning groove (for example, V groove) 12d formed on the holding surface of the fiber holding portion 12a. It is placed halfway.

  The extension portion 3b of the built-in optical fiber 3 and the insertion optical fiber 4 are positioned and connected by being sandwiched by fiber clamping portions 12a and 12b surrounded by an elastic spring 18 having a C-shaped cross section. These fiber clamping portions 12 a and 12 b are divided into a portion for fixing the bare optical fiber and two portions for fixing the covering portion of the insertion optical fiber 4. Similarly, the positioning groove (V groove) 12d is also composed of two parts according to the diameter of the covering part of the insertion optical fiber 4.

  As shown in FIG. 6, two insertion guides 12e are formed between the pair of fiber clamping portions 12a and 12b. The insertion guide 12e serves as an inlet for an insertion member (wedge) that widens the distance between the pair of fiber clamping portions 12a and 12b.

  Next, the structure of the optical fail fixing part 10 incorporating the ferrule 1 will be described in detail.

  The optical fail fixing part 10 is a combined body of the stop ring 13 and the plug frame 14, and both parts are fitted at the position of the plug frame fitting part 13a. However, in the cross-sectional view of FIG. 4, only the relative position of the fitting portion is shown, and the fitting structure is not shown. On the other hand, the boot fitting portion 13b of the stop ring body portion 13c is formed with irregularities and covered with a resin boot 50.

  Inside the optical ferrule fixing part 10, the optical ferrule 1 is biased forward by a main spring 15 provided between the optical ferrule flange 11 and the spring receiver of the stop ring 13.

  The rear end of the main spring 15 is in contact with an annular seat 16 formed on the inner wall surface of the plug frame fitting portion 13a of the stop ring 13, and the main spring 15 is disposed so as to surround the fiber holding portions 12a and 12b. Has been.

  The front end of the main spring 15 abuts on the optical ferrule flange 11, and the optical ferrule 1 is pressed forward against the stop ring 13. Both ends of the stop ring 13 are open, and the insertion optical fiber 4 is inserted from the rear end opening.

  As shown in FIGS. 3 and 6, the stop ring 13 is formed with an insertion guide (insertion portion) 13m for inserting an insertion member (not shown) between the pair of fiber clamping portions 12a and 12b. Yes.

  Further, as shown in FIG. 5, on the rear outer periphery of the stop ring main body portion 13 c of the stop ring 13, a spring 60 inserted between the optical ferrule fixing portion 10 and the front housing 20 is provided on the boot fitting portion 13 b side. A receiving portion 13d for receiving one end is provided. The receiving part 13d is a flange projecting annularly from the outer periphery of the stop ring main body part 13c, and may be referred to as an outer peripheral flange in the present invention.

  The spring 60 is a small-diameter coil spring that urges the front housing 2 in a direction away from the optical ferrule fixing portion 10. A notch 13e for locking one end of the spring 60 is formed on the front wall of the outer peripheral flange 13d.

  A restriction pin (metal bar) 61 is inserted inside the spring 60 in order to ensure the posture of the coil spring. The restriction pin 61 includes a pin main body 61a and a head portion 61b provided at the end of the pin main body 61a. One end of the spring 60 is fixed in contact with the head portion 61 b of the regulation pin 61.

  The head portion 61 b of the restriction pin 60 is also inserted into the notch 13 e formed in the outer peripheral flange 13 d together with one end of the spring 60.

  Here, the regulation pin 61 has not only a function of preventing the spring 60 from being bent but also a function of regulating the movement of the optical ferrule fixing part 10 with respect to the front housing 20.

  As shown in FIG. 4, an inner peripheral flange 17 projects from the inner wall surface of the plug frame 14 to form an opening 17a.

  When not connected, the wall surface of the inner peripheral flange 17 and the contact surface of the optical ferrule flange 11 are in contact with each other by spring pressure, and the tip of the optical ferrule 1 is pressed so as to protrude from the tip of the plug frame 14.

  The stop ring 13 and the plug frame 14 are made of a resin such as polybutylene terephthalate (PBT) resin.

  Next, the front housing 20 will be described with reference to FIGS. 2, 3, 7 and 8. 7 is a perspective view showing the front housing of FIG. 1, and FIG. 8 is a sectional view of the front housing of FIG.

  As shown in FIG. 7, the front housing 20 has a cylindrical shape, and includes a base portion 20a, a guide wall portion 20b facing the base portion 20a, a connecting portion 20c for connecting the base portion 20a and the guide wall 20b, 20d. As shown in FIG. 8, openings 20 g and 20 h are formed at both ends of the front housing 20.

  A direction from the opening 20g (hereinafter referred to as “rear end opening 20g”) side of the front housing 20 toward the opening 20h (hereinafter referred to as “front end opening 20h”) is provided on the outer wall surface of the guide wall portion 20b (FIG. 7). A guide rail 20e extending in the X direction) is projected.

  Further, two guide recesses 20f that are spaced apart from each other are formed on the outer wall surfaces of the connecting portions 20c and 20d. The guide recess 20f extends along the X direction in FIG. In the middle of the guide recess 20f, a lock claw 20j for locking the rear housing 40 to the front housing 20 is provided near the end of the guide recess 20f on the front end opening 20h side. Here, a guide projection 40f of the rear housing 40 described later is engaged with a portion between the end of the guide recess 20f on the front end opening 20h side and the lock claw 20j.

  A leaf spring fixing groove 20i for fixing the leaf spring member 30 is formed on the inner wall surface of each of the connecting portions 20c and 20d of the front housing 20 on the base portion 20a side. The leaf spring fixing groove 20 i extends to the rear end opening 20 g of the front housing 20.

  Further, a long hole (spring guide) 20k is formed in the guide rail 20e, and a spring 60 with a small regulating pin is inserted into the spring guide 20k. That is, the regulation pin 61 is inserted into the spring guide 20k from the pin body 61a side with the pin body 61a passing through the spring 60. Here, the head portion 61b of the regulation pin 61 can also be inserted into the spring guide 20k.

  On the other hand, the head portion 61a of the regulation pin 61 is received by a notch 13e provided in the outer peripheral flange 13d of the stop ring 13, as shown in FIG. Therefore, the movement of the optical ferrule fixing part 10 toward the front end opening 20 h of the front housing 20 is restricted by the restriction pin 61.

  Further, as shown in FIGS. 3 and 7, a notch (insertion portion) for inserting an insertion member (not shown) between the pair of fiber holding portions 12a and 12b on the rear end opening 20g side of the base portion 20a. ) 20m is formed.

  Next, the rear housing 40 will be described with reference to FIGS. 2, 3, 9 and 10. 9 and 10 are perspective views showing the rear housing 40 of FIGS. 1 and 2.

  As shown in FIGS. 9 and 10, the rear housing 40 has a flared shape, and connects the base portion 40a, the guide wall portion 40b facing the base portion 40a, and the base portion 40a and the guide wall portion 40b. The connection parts 40c and 40d are provided.

  A guide recess 40e for guiding the rear housing 40 along the guide rail 20e of the front housing 20 is formed on the inner wall surface of the guide wall portion 40b. The guide recess 40e extends in a direction (X direction in FIG. 9) from the opening 40g (hereinafter referred to as “rear end opening 40g”) side of the rear housing 40 toward the opening 40h (hereinafter referred to as “front end opening 40h”). It extends.

  Further, guide protrusions 40f that engage with the guide recesses 20f of the front housing 20 are provided on the inner wall surfaces of the connecting portions 40c and 40d. The guide protrusion 40f is provided near the front end opening 40h on the inner wall surface of the connecting portions 40c and 40d.

  Further, as shown in FIG. 10, the base portion 40a, the guide wall portion 40b, and the connecting portions 40c and 40d are provided with locking claws 40i for locking the optical ferrule fixing portion 10 on the rear end opening 40g side. Yes.

  Further, as shown in FIGS. 2 and 3, a notch (insertion portion) 40m for inserting an insertion member (not shown) between the pair of fiber clamping portions 12a and 12b on the front end opening 40h side of the base portion 40a. An insertion guide (insertion portion) 40n for inserting another insertion member is formed on the rear end opening 40g side of the notch 40m.

  The front housing 20 and the rear housing 40 are made of a resin such as polyphenylene sulfide (PPS) resin.

  Next, the leaf spring member 30 will be described with reference to FIGS. 11 and 12. FIG. 11 is a side view showing the leaf spring member 30. FIG. 12 is a plan view showing the leaf spring member 30 and shows the leaf spring member 30 attached to the front housing 20 in order to show the positional relationship with the front housing 20.

  As shown in FIG. 11, the leaf spring member 30 includes a base end portion 30a fixed to the base portion 20a of the front housing 20, a distal end portion 30c, and a connecting portion 30b connecting the distal end portion 30c and the base end portion 30a. have. As shown in FIG. 12, the leaf spring member 30 has a base by engaging both edge portions 30 d and 30 e of the base end portion 30 a with leaf spring fixing grooves 20 i formed in the connecting portions 20 c and 20 d of the front housing 20. It is fixed to the part 20a.

  Here, the tip portion 30 c of the leaf spring member 30 faces the tip of the optical ferrule 1 when the optical ferrule fixing portion 10 is inserted from the rear end opening 20 g of the front housing 20. Specifically, the distal end portion 30c of the leaf spring member 30 is disposed so as to intersect the optical axis of the fixed portion 3a in the built-in optical fiber 3. The base end portion 30 a of the leaf spring member 30 is disposed between the optical ferrule fixing portion 10 and the base portion 20 a of the front housing 20. The connecting portion 30 b is in a curved state before the optical ferrule fixing portion 10 is inserted into the front housing 20. Specifically, the connecting portion 30 b is in a convex state toward the front end opening 20 h side of the front housing 20. The connecting portion 30b can be deformed into a planar shape by applying a pressing force to the base portion 20a. When the pressing force is released, the connecting portion 30b returns to the original curved state again by the restoring force of the connecting portion 30b. It has become.

  The leaf spring member 30 is made of a light-shielding material such as a metal member such as stainless steel.

  Next, a method for assembling the optical connector 100 described above will be described.

  First, the optical ferrule fixing part 10 is inserted into the front housing 20. At this time, the optical ferrule fixing part 10 is inserted into the front housing 20 after the optical ferrule 1 of the optical ferrule fixing part 10 faces the rear end opening 20 g of the front housing 20. At this time, the restriction pin 61 is inserted from the pin body 61a side.

  Then, the restriction pin 61 is inserted into the spring guide 20 k of the front housing 20 in a state where it is inserted into the spring 60.

  Next, the front housing 20 is inserted from the front end opening 40 h side of the rear housing 40 together with the optical ferrule fixing portion 10. At this time, the optical ferrule fixing part 10 is inserted into the rear housing 40 after the boot fitting part 13 b of the optical ferrule fixing part 10 faces the front end opening 40 h of the rear housing 40.

  At this time, the restricting pin 61 is received by the outer peripheral flange 13d of the optical ferrule fixing portion 10 (see FIG. 5), and the guide protrusion 40f of the rear housing 40 is engaged with the guide recess 20f of the front housing 20, so that the rear housing 40 is engaged. The guide rail 20e of the front housing 20 is engaged with the guide recess 40e.

  At this time, when the spring 60 is compressed, the optical ferrule fixing part 10 is pushed back in the direction opposite to the insertion direction, so that the position of one end of the spring 60 may be shifted from the outer peripheral flange 13d. That is, the outline of the positioning spring guide 20k for ensuring the posture of the spring 60 is not closed and the inner surface is open, so that the contact portion may be displaced and the spring 60 may come off.

  In this regard, in the optical connector 100, since one end of the spring 60 is locked by the notch 13e, the position of one end of the spring 60 is prevented from being displaced from the outer peripheral flange 13d, and the optical ferrule fixing portion 10 is attached to the front housing 20. It can be easily inserted. Therefore, the assembly work of the optical connector 100 can be easily performed.

  In particular, in the present embodiment, since the regulation pin 60 penetrates the spring 60, the spring 60 can be prevented from being bent excessively, and the work of inserting the spring 60 into the spring guide 20k of the front housing 20 is facilitated.

  Then, as shown in FIG. 3, alignment is performed so that the positions of the insertion guide 13m of the stop ring 13, the notch 20m of the front housing 20, and the notch 40m of the rear housing 40 coincide with each other, and the insertion of the stop ring 13 is performed. Positioning is performed so that the positions of the guide 13m and the insertion guide 40n of the rear housing 40 coincide.

  Thereafter, an insertion member (not shown) is inserted through the insertion guide 13m of the stop ring 13, the notch 20m of the front housing 20, and the notch 40m of the rear housing 40, and the insertion guide 13m of the stop ring 13 and the rear housing 40. Another insertion member (not shown) is inserted into the insertion guide 40n. Thus, a gap is formed between the pair of fiber holding portions 12a and 12b.

  Then, the optical fiber cable F is inserted from the rear end opening 40g side of the rear housing 40, and the insertion optical fiber 4 of the optical fiber cable F is inserted into the fiber insertion guide 13f of the boot fitting portion 13b of the optical ferrule fixing portion 10. The optical fiber cable F is connected and fixed to the optical ferrule fixing part 10.

  Next, the end face of the insertion optical fiber 4 and the end face of the extension part 3b of the built-in optical fiber 3 built in the optical ferrule 1 are fixed to each other by the pair of fiber holding parts 12a and 12b.

  At this time, since the optical path of the light emitted from the built-in optical fiber 3 is closed by the leaf spring member 30, even when the light from the insertion optical fiber 4 is emitted through the built-in optical fiber 3, the work is performed. There is no worry that the person will look directly at the light. At this time, since the insertion member is inserted between the pair of fiber clamping portions 12a and 12b through the insertion guide 13m of the stop ring 13 and the insertion guide 40m of the rear housing 40, the front of the optical ferrule fixing portion 10 is inserted by the insertion member. Movement with respect to the housing 20 is restricted, and the optical path of the light emitted from the built-in optical fiber 3 can be kept closed. For this reason, at the site where the insertion optical fiber 4 is connected to the built-in optical fiber 3 of the optical connector 100, the operator can assemble the optical connector 100 with more peace of mind.

  Note that the optical ferrule fixing part 10 can move with respect to the front housing 20 after the insertion member is removed. At this time, even if a light force enough to insert the optical ferrule fixing part 10 into the front housing 20 is unexpectedly applied, the optical ferrule fixing part 10 is pushed back in the direction opposite to the insertion direction by the spring 60. 30 is not easily pushed away by the optical ferrule fixing part 10. That is, the optical path of the light emitted from the built-in optical fiber 3 is not easily opened. For this reason, even after the insertion member is removed, the light from the insertion optical fiber 4 is emitted via the built-in optical fiber 3, so that there is no worry that the operator looks directly at the light.

  Next, a preparation method for connecting the optical connector 100 to another optical connector via an adapter (not shown) will be described with reference to FIG. FIG. 13 is a perspective view showing a state after the optical connector of FIG. 1 is assembled and a preparation state when connecting to another optical connector.

  In this case, the insertion member is first removed. Thereby, the movement restriction | limiting with respect to the front housing 20 of the optical ferrule fixing | fixed part 10 is cancelled | released.

  Therefore, when the rear housing 40 is pinched and moved to the front end opening 20h side of the front housing 20, the optical ferrule fixing portion 10 is pushed by the locking claw 40i of the rear housing 40 and slides toward the front end opening 20h of the front housing 20. Is done. Then, the distal end portion 30 c of the leaf spring member 30 is pushed away by the optical ferrule 1 and is placed between the optical ferrule fixing portion 10 and the base portion 20 a of the front housing 20. That is, the leaf spring member 30 is retracted from the end face of the optical ferrule 1. As a result, the optical path of the built-in optical fiber 3 built in the optical ferrule 1 can be opened.

  When the optical ferrule fixing portion 10 is further slid toward the front end opening 20h of the front housing 20 until the plug frame 14 protrudes from the front end opening 20h of the front housing 20, the rear housing 40 is locked to the front housing 20. . Specifically, the guide protrusions 40f provided on the inner wall surfaces of the connecting portions 40c, 40d of the rear housing 40 get over the lock claws 20i provided in the guide recesses 20f of the connecting portions 20c, 20d of the front housing 20, and guide The protrusion 40f engages with a portion between the end of the guide recess 20f on the front end opening 20h side and the lock claw 20j. As a result, the rear housing 40 cannot move to the front end opening 20 h side or the rear end opening 20 g side of the front housing 20, and is locked to the front housing 20. As a result, as shown in FIG. 13, the state in which the plug frame 14 protrudes from the front end opening 20h of the front housing 20 can be maintained. Thereby, since the plug frame 14 can be inserted into the adapter, the optical connector 100 can be connected to another optical connector via the adapter.

  When the front housing 20 is pressed and the rear housing 40 is slid toward the rear end opening 20g of the front housing 20, the guide protrusion 40f of the rear housing 40 is locked in the guide recess 20f of the connecting portions 20c and 20d of the front housing 20. Get over the nail 20i. Then, since the compressed state of the spring 60 is released, the optical ferrule fixing part 10 is moved so as to be expelled from the front housing 20. Along with this, the connecting portion 30 b of the leaf spring member 30 is bent again by its restoring force, and the tip thereof faces the tip of the optical ferrule 1. That is, the tip 30 c of the leaf spring member 30 covers the end face of the optical ferrule 1. Therefore, even after the optical connector 100 is removed from the adapter, the light emitted from the built-in optical fiber 3 is blocked by the leaf spring member 30, so that the optical connector 100 can be handled safely regardless of the skill level of the operator. it can.

  The present invention is not limited to the embodiment described above. For example, in the above-described embodiment, the locking portion is the notch 13e, but may be a recess 13h ((a) in FIG. 14), and extends from the outer peripheral flange 13d to the surface of the stop ring main body 13c. The pair of protruding portions 13g may be extended ((b) in FIG. 14).

  Furthermore, in the above embodiment, the regulation pin 61 penetrates the spring 60, but the regulation pin 61 is not necessarily required and can be omitted. Even in this case, since one end of the spring 60 is locked by the notch 13e of the outer peripheral flange 13d, the work of inserting the optical ferrule fixing part 10 into the front housing 20 becomes easy.

  Further, in the above embodiment, the leaf spring member 30 is used as the shutter means, but any member can be used as long as it can open and close the optical path of the light emitted from the built-in optical fiber 3.

It is a perspective view which shows the state immediately after the assembly of the optical connector which concerns on this invention. It is sectional drawing of FIG. 1, and is a cross-sectional view of the longitudinal direction containing an AA 'line. It is a partial bottom view which shows the optical connector of FIG. It is sectional drawing of the optical ferrule fixing | fixed part in the optical connector of FIG. 1, and is sectional drawing of the longitudinal direction containing an AA 'line. It is a fragmentary top view which shows the state at the time of inserting an optical ferrule fixing | fixed part in a front housing. It is sectional drawing which shows the optical ferrule fixing | fixed part of FIG. 1, Comprising: It is sectional drawing of the direction orthogonal to the optical axis of a built-in optical fiber. It is a perspective view which shows the front housing of FIG. It is sectional drawing which shows the front housing of FIG. It is a perspective view which shows the rear housing of FIG. It is a perspective view which shows the rear housing of FIG. It is a side view which shows the leaf | plate spring member of FIG. It is a top view which shows the leaf | plate spring member of FIG. It is a perspective view which shows the preparation state at the time of connecting the state after the assembly of the optical connector of FIG. 1, and another optical connector. (A) is a partial top view which shows one modification of a latching | locking part, (b) is a partial top view which shows the other modification of a latching | locking part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Optical ferrule, 3 ... Built-in optical fiber, 4 ... Insertion optical fiber, 10 ... Optical ferrule fixing | fixed part, 11 ... Optical ferrule flange, 12a, 12b ... Fiber clamping part, 12c ... Fiber clamping surface, 12d ... Fiber positioning groove, 13 ... Stop ring, 13a ... Plug frame fitting portion, 13b ... Boot fitting portion, 13c ... Stop ring main body portion, 13d ... Receiving portion, 13e ... Notch (locking portion), 13g ... Projection portion (locking) Part), 13h ... concave part (locking part), 13m ... insertion guide (insertion part), 14 ... plug frame, 15 ... main spring, 16 ... seat part, 17 ... inner peripheral flange 17a ... opening, 18 ... elastic spring, DESCRIPTION OF SYMBOLS 20 ... Front housing, 20a ... Base part, 20b ... Guide wall part, 20c, 20d ... Connection part, 20e ... Guide rail, 20g ... Opening, 20h ... Opening 20i ... leaf spring fixing groove, 20j ... lock claw, 20k ... spring guide, 20m ... notch (insertion portion), 30 ... leaf spring member (shutter means), 30a ... base end portion, 30b ... coupling portion, 30c ... tip Part, 30d, 30e ... edge part, 40 ... rear housing, 40a ... base part, 40b ... guide wall part, 40c, 40d ... coupling part, 40e ... guide recess, 40f ... guide projection, 40g ... rear end opening, 40h ... Front end opening, 40i ... locking claw, 40m ... notch (insertion portion), 40n ... insertion guide (insertion portion), 50 ... boot, 60 ... spring, 61 ... regulating pin, 61a ... pin body, 61b ... head portion, 100: optical connector, F: optical fiber cable.

Claims (2)

An optical ferrule fixing part composed of a combination of a plug frame and a stop ring;
A front housing slidably mounted on the outside of the optical ferrule fixing part;
It consists of a rear housing mounted outside the front housing,
An optical connector with a shutter comprising shutter means for opening and closing an optical path of light emitted from the optical ferrule,
Between the front housing and the outer peripheral flange of the stop ring, a small-diameter spring that is urged in the direction of pushing the front housing against the stop ring is inserted,
The spring is housed in a spring guide formed on a side surface of the front housing,
The receiving portion of the spring of the outer peripheral flange is provided with a locking portion for locking one end of the spring,
The locking portion is formed in the receiving portion Ri one end insertable notch Kidea of the spring,
Further comprising a regulation pin penetrating the spring;
The regulation pin, Rukoto to have a said head portion inserted into the notch portion with one end fixed and the spring in abutment at one end of the spring,
An optical connector with a shutter. The spring guide is a hole for receiving the spring ;
The optical connector with a shutter according to claim 1.

Images