JP2005196080A - Optical connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical connector realizing high accuracy positioning between optical fibers which are to be connected to each other. <P>SOLUTION: An optical connector 30 is coupled to a receiving side optical connector 22 by positioning, to a frame 34, the optical connector 30, by inserting and coupling a fixing key ring 31 into a key groove 23 of the receiving side connector 22. The key ring 31 is provided with a key ring body 36; a key 33 consisting of a pair of elastically deformable projection pieces 33a, 33b which are projected from the key ring body 36 and inserted into the key groove 23 for coupling; and a stopper projection piece 38 which is projected from the key ring body 36, positioned in between the pair of projection pieces 33a, 33b, and limits an elastic deformation range of the pair of projection pieces 33a, 33b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an optical connector that performs positioning around an axis when connected to a receiving side optical connector such as an optical connector adapter such as an FC type optical connector established in JIS C 5970.

  Conventionally, as this type of optical connector, for example, one having the configuration shown in FIGS. 6 and 7 is known (FIGS. 6 and 7 show an example of an FC type optical connector). The optical connector 1 includes a substantially cylindrical frame 2, a sleeve-like stopper 3 connected to the frame 2, a boot 4 assembled to the stopper 3, and a cup rotatably attached to the frame 2. It has a ring nut 6, a spring 7 housed in the frame 2, and a ferrule 8 inserted in the frame 2. The stopper 3 holds the optical fiber 35a whose tip is housed in the ferrule 8 together with the holding parts and the boot 4 incorporated therein, and prevents the optical connector 1 from being pulled backward (left side in FIG. 6). Part 5 is configured.

  The ferrule 8 has a cylindrical shape with a flange portion 9 provided at the rear end portion thereof, and four locking grooves 10 are formed at 90 ° intervals on the outer peripheral surface of the flange portion 9. When the ferrule 8 is inserted into the frame 2, these locking grooves 10 are formed so as to be locked to a locking strip 11 projecting from the inside of the frame 2 for positioning, and will be described later. When centering (also referred to as alignment), the locking groove 10 is selectively inserted into and engaged with the locking strip 11 so that the ferrule 8 is positioned around the axis. Yes.

  The ferrule 8 can move a little in the axial direction of the frame 2 within a range in which the engagement state between the engagement strip 11 and the engagement groove 10 is maintained. 7 is shrunk. The spring 7 generates a butting force between the ferrules 8 that are butted when the optical connector 1 is connected. Further, the jumping of the ferrule 8 from the frame 2 to the front of the optical connector 1 is restricted by a stopper (not shown).

  Further, a male screw portion 12 is formed on the rear end side of the outer peripheral surface of the frame 2, and a female screw portion 13 formed on the rear end side of the coupling nut 6 is screwed into the male screw portion 12. ing. Here, the female screw portion 13 is formed on the inner peripheral surface of the protruding portion 14 that protrudes inwardly on the rear end side of the coupling nut 6. Further, the coupling nut 6 has an inner diameter dimension on the front end side that is sufficiently larger than an outer diameter dimension of the frame 2, and a sleeve portion 22 a of an optical connector adapter 22 to be described later is formed on the inner peripheral surface on the front end side. A female screw portion 15 that is screwed into a male screw portion formed on the outer peripheral surface is formed.

  Further, a convex portion 16 is formed on the outer peripheral surface of the frame 2 on the tip side from the male screw portion 12. The convex portion 16 extends along the circumferential direction of the frame 2, and comes into contact with the protruding portion 14 of the coupling nut 6 via a washer 17, so that the coupling nut 6 is attached to the frame 2. It is prevented from coming out more.

  In the optical connector 1 having such a configuration, for example, by connecting a pair of optical connectors 1 to both sides of a general optical connector adapter 22, a butt connection between the ferrules 8 makes it possible to connect each optical connector 1. Optical connection between the optical fibers 35a can be realized. That is, in order to connect the optical connector 1 to the optical connector adapter 22, the frame 2 and the ferrule 8 of the optical connector 1 are inserted into the sleeve portion 22 a of the optical connector adapter 22. The key 27 of the key ring 18 is inserted into and engaged with the key groove 23, and the coupling nut 6 of the optical connector 1 is screwed onto the male screw portion of the sleeve portion 22 a of the optical connector adapter 22. Accordingly, the ferrules 8 positioned and held in the frame 2 of each optical connector 1 connected via the optical connector adapter 22 are aligned on the same straight line by a positioning mechanism such as a positioning sleeve built in the optical connector adapter 22. Are precisely positioned and butt-connected. Further, the engagement between the key groove 23 of the optical connector adapter 22 and the key 27 of the key ring 18 enables positioning around the axis between the ferrules 8 of each optical connector 1.

  In such an optical connector 1, the position of the optical fiber 35a (specifically, the core of the optical fiber) inserted and fixed in the ferrule 8 is adjusted in the optical connector 1 (specifically, the position is adjusted relative to the frame 2), and the connection loss is thus achieved. It is widely practiced to optimize (alignment) so that is sufficiently low. In this case, the alignment between the optical fiber 35a in the ferrule 8 and the frame 2 is checked, for example, by a monitor device, and thereby the locking groove 10 of the flange portion 9 and the frame 2 are aligned as described above. Of the combinations of engagement with the locking strips 11, the optical connector 1 is adopted by adopting a place where the connection loss between the optical fibers 35 a between the optical connectors 1 and 1 connected via the optical connector adapter 22 is minimized. Assemble. When the optical connectors 1 assembled in this way are connected via the optical connector adapter 22, the optical fibers 35a inserted and fixed to the ferrule 8 of each optical connector 1 are butt-connected with a low connection loss.

  By the way, PMF (Polarization-Maintaining Optical Fiber. PANDA, ELLIPTICAL-CLAD. PANDA: Polarization maintaining and absorbing fiber) connection, APC (Angle Phase Contact) polishing type, especially high ferrule, etc. are adopted. In the optical connector 1 that requires positioning accuracy, the key 27 of the optical connector 1 and the key groove 23 of the optical connector adapter 22 to which the optical connector 1 is connected are determined depending on the manufacturer and the standard based on the type of ferrule used. Since there is a difference in size (groove width), it is necessary to select the optical connector 1 or the optical connector adapter 22 to be used, which is inconvenient.

  In addition, in order to increase the positioning accuracy at the time of connection, the dimensional tolerance of the key groove 23 of the optical connector adapter 22 and the key 27 of the optical connector 1 is tightened. There was a dissatisfaction that the cost of the optical connector 1 rebounded greatly.

  Further, in the case of the FC type optical connector, since the method of fixing to the optical connector adapter 22 is a screw type (screw coupling of the coupling nut 6 described above), there is a slight clearance between the key 27 and the key groove 23. (When the required positioning accuracy is not so high), the key 27 moves in the key groove 23 due to the rotation operation of the screw (coupling nut) when attaching to or detaching from the optical connector adapter 22, which is the cause. In addition, there is a possibility of adversely affecting the optical fiber 35a and the ferrule 8 such as damaging the tip of the optical fiber 35a exposed at the tip of the ferrule 8, and therefore, there has been a demand for development of a technology that can reliably prevent this. .

In order to cope with this, the present inventors have formed the key 19 of the key ring 18 by a pair of projecting pieces 19a and 19b projecting from the key ring body 20, as shown in FIGS. There has already been proposed a technique in which a slit-like clearance (deformation space) 21 is ensured between the two projecting pieces 19a and 19b (see, for example, Patent Document 1). In the key ring 18, the dimension W1 of the key 19 in the width direction, that is, between the side surface opposite to the slit 21 of one projecting piece 19a and the side surface opposite to the slit 21 of the other projecting piece 19b. Can be reduced by elastic deformation of one or both of the projecting pieces 19a and 19b, and the key 19 can be inserted into the key groove 23 corresponding to the groove width of the key groove 23 in the optical connector adapter 22. Therefore, it is possible to cope with the dimensional tolerance and the difference in type between the key groove 23 in the optical connector adapter 22 and the key 19 in the optical connector 1, and there is no backlash, and the optical fibers to be connected can be positioned with high accuracy. It becomes.
JP 2003-98385 A

  However, in this prior art, when the key 19 in the optical connector 1 is repeatedly inserted and removed from the key groove 23 in the optical connector adapter 22, the base end portions 24a and 24b of the pair of projecting pieces 19a and 19b are easily damaged. There was a problem with the durability of the key 19.

  In addition, since one protruding piece 19 a is thinner than the key 27 of the optical connector 1 shown in FIG. 7, the bending strength is inferior to the key 27. Therefore, for example, the coupling nut is inserted with the key 19 of the optical connector 1 obliquely inserted into the key groove 23 of the optical connector adapter 22 or the key 19 of the optical connector 1 inserted into the key groove 23 of the optical connector adapter 22. When 6 is tightened more than necessary, the pair of projecting pieces 19a and 19b are bent beyond the yield point, so that deformation cannot be restored or desired mechanical characteristics cannot be obtained. There is a problem that the inconvenience is likely to occur. Needless to say, when the above-described inconvenience occurs, the optical fibers to be connected cannot be positioned with high accuracy.

  The present invention solves the problems in the prior art as described above, and is a pair of protrusions as keys in an optical connector that are inserted into and engaged with a key groove in a receiving optical connector such as an optical connector adapter. An object of the present invention is to provide an optical connector capable of setting a bending limit on at least one of the pieces, preventing the pair of pieces from being damaged, and enabling high-precision positioning of the connected optical fibers. It is said.

For the above purpose, the present invention has a cylindrical frame and a ferrule accommodated in the frame by restricting rotation around the axis relative to the frame, and the frame and the ferrule receiving side optical connector. In the optical connector connected to the receiving side optical connector by inserting into the key groove of the receiving side optical connector and performing positioning around the axis by inserting and engaging the key part fixed to the frame in the key groove of the receiving side optical connector ,
The key component includes a base portion fixed to the frame and a pair of protrusions that protrude from the base portion and that can be inserted into and engaged with the key groove and elastically deformed in the groove width direction of the key groove. A key that is a piece, and is protruded from the base portion, is positioned between the pair of protrusions, and is elastically deformed by contacting at least one of the pair of protrusions. It is an optical connector characterized by including the stopper protrusion piece which regulates.

  According to the present invention, for example, when the key is obliquely inserted into the key groove or the coupling nut in the FC type optical connector is rotated and tightened with the key inserted into the key groove. Since at least one of the pair of projecting pieces comes into contact with the stopper projecting piece, elastic deformation of the at least one projecting piece is restricted, so that the projecting piece bends beyond its yield point. Can be prevented and the durability of the key can be improved. Thereby, it is possible to prevent the pair of projecting pieces from being damaged, to prevent the optical connector from being displaced relative to the receiving-side optical connector, and to enable highly accurate positioning of the optical fibers to be connected.

  In the present invention, the length of the stopper protrusion in the protruding direction is shorter than the length of the pair of protruding pieces in the protruding direction, and the stopper protrusion is at least one of the pair of protrusions. In this case, the projecting piece base end part and the projecting piece tip end part may be in contact with the projecting piece middle part.

  According to the present invention, since the stopper protruding piece is short, the stopper protruding piece is more advantageous than the protruding piece in terms of bending resistance, and is effective for reinforcing the pair of protruding pieces.

  The present invention further includes a cylindrical frame and a ferrule accommodated in the frame by restricting rotation around the axis with respect to the frame, and inserting the frame and the ferrule into the receiving optical connector. In the optical connector that is positioned around the axis by inserting and engaging the key part fixed to the frame into the key groove of the receiving side optical connector, the key part is connected to the receiving side optical connector. Are a base portion fixed to the frame, and a pair of projecting pieces protruding from the base portion, inserted into and engaged with the key groove, and elastically deformable in the groove width direction of the key groove. An optical connector comprising a key and a stopper protrusion that is provided on each of the pair of projecting pieces and restricts elastic deformation of the projecting pieces by contacting each other.

  According to the present invention, for example, when the key is obliquely inserted into the key groove or the coupling nut in the FC type optical connector is rotated and tightened with the key inserted into the key groove. Since the stopper protrusions are in contact with each other, elastic deformation of at least one of the projecting pieces is restricted, so that the projecting pieces are prevented from bending beyond the yield point, and the durability of the key can be improved. Thereby, it is possible to prevent the pair of projecting pieces from being damaged, to prevent the optical connector from being displaced relative to the receiving-side optical connector, and to enable highly accurate positioning of the optical fibers to be connected.

  According to the present invention, for example, when the key is obliquely inserted into the key groove or the coupling nut in the FC type optical connector is rotated and tightened with the key inserted into the key groove. Since the elastic deformation of the at least one protruding piece is restricted, the protruding piece is prevented from bending beyond its yield point, and the durability of the key can be improved. Thereby, it is possible to prevent the pair of projecting pieces from being damaged, to prevent the optical connector from being displaced with respect to the receiving side optical connector, and to enable highly accurate positioning of the optical fibers to be connected.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view for explaining an embodiment of an optical connector according to the present invention. Reference numeral 30 in FIG. 1 denotes an optical connector. In the optical connector 30 of this example, as shown in FIGS. 2 (a) and 3 (a), a key ring 31 as a key component is partially cut out (noted portion is denoted by reference numeral 36) and is discontinuous. The ring-shaped key ring main body (base portion) 32 and a key 33 which is a pair of projecting pieces extending to one side of the key ring main body 32 are metal parts. The key ring 31 will be described later in detail. When assembling the optical connector 30, the key ring 31 is extrapolated on the outer peripheral surface of the frame 34 and can be positioned at a fixed position with respect to the frame 34 by rotating around the axis of the frame 34. The key ring 31 is positioned by rotation around the axis of the frame 34, and then fixed to the frame 34 by adhesive fixing with an adhesive or the like.

  The optical connector 30 can be connected to the optical connector adapter 22. The connection target of the optical connector 30 is not limited to the optical connector adapter 22, and for example, various optical connectors (receiving optical connector) such as an optical connector receptacle can be adopted.

  The case where the optical connector adapter 22 is employed as the receiving side optical connector and the pair of optical connectors 30 are connected via the optical connector adapter 22 will be described as an example. By connecting the optical connectors 30 to both sides of the sleeve portion 22a, In the optical connector adapter 22, the ferrules 8 of the optical connectors 30 are abutted and connected to each other, and an optical fiber 35a inserted into and fixed to each ferrule 8 (an optical fiber led to the tip of the optical fiber 35 such as an optical fiber cord). Here, the bare optical fibers) are optically connected. However, the positioning around the axis with respect to the other ferrule to which the ferrule 8 of the optical connector 30 is butt-connected, in other words, the positioning around the axis with respect to the sleeve portion 22a of the optical connector 30 in this example is adhesively fixed to the outside of the frame 34. The key 33 of the key ring 31 is inserted and engaged with the key groove 23 of the sleeve portion 22a.

  In the case of a receiving side optical connector other than the optical connector adapter 22, such as an optical connector receptacle, the key 33 of the key ring 31 of the optical connector 30 is inserted into and engaged with the key groove on the receiving side optical connector side. Positioning about the axis 30 is performed, and the ferrule on the receiving side optical connector side and the ferrule 8 on the optical connector 30 side are butt-connected.

  In this optical connector 30, in the assembling process, the alignment of the optical fiber 35a inserted and fixed in the ferrule 8 is engaged with the locking of the flange portion that engages with the locking strip of the frame shown in FIG. In addition to the selection of the groove, high alignment accuracy can be easily obtained by adjusting the fixing position of the key ring 31 in the direction around the axis of the frame 34 (in other words, in the circumferential direction). Reduction can be realized.

Next, the key 33 which is the gist of the present invention will be described in detail.
2A to 2D show the key ring 31 in the optical connector 1 according to the first embodiment of the present invention.
The key ring 31 according to the first embodiment of the present invention is protruded from the key ring main body 32 and the key ring main body 32 inserted into the frame 34, and is inserted into and engaged with the key groove 23 of the receiving side optical connector 22. A key 33, which is a pair of projecting pieces 33a, 33b that can be elastically deformed in the groove width direction of the key groove 23, and a key ring main body 32 are provided so as to be positioned in a slit 37 between the pair of projecting pieces 33a, 33b. And a stopper protrusion 38 that abuts at least one of the pair of protrusions 33a and 33b and restricts elastic deformation of the protrusion.
Since the pair of projecting pieces 33a and 33b can be elastically deformed, the difference in the groove widths of the various key grooves 23 can be absorbed.

  The stopper protruding piece 38 has an elongated bar shape, and the length of the stopper protruding piece 38 in the protruding direction is shorter than the length of the protruding pieces 33a and 33b in the protruding direction. In the projecting pieces 33a and 33b, the projecting piece base end portions 39a and 39b and the projecting piece distal end portions 40a and 40b are in contact with the projecting piece middle portions 41a and 41b.

  In addition, the inner side surfaces 42 a and 42 b of the pair of projecting pieces 33 a and 33 b that are in contact with the stopper projecting piece 38 are flat surfaces having no step and extend in parallel with the stopper projecting piece 38.

  As shown in FIG. 2C, when the pair of projecting pieces 33a and 33b as the key 33 is inserted into the key groove 23 of the receiving side optical connector 22, each of the pair of projecting pieces 33a and 33b By abutting on the tip of the piece 38 (the tips of the pair of projecting pieces 33a and 33b are not in contact with each other), the stopper projecting piece 38 restricts elastic deformation of the pair of projecting pieces 33a and 33b.

  In the first embodiment of the present invention, when the pair of projecting pieces 33a and 33b as the key 33 is inserted into the key groove 23 of the receiving side optical connector 22, each of the pair of projecting pieces 33a and 33b is The stopper protrusion 38 may not come into contact. In this case, as shown in FIG. 2D, when the key 33 is obliquely inserted into the key groove 23 or when the tightening force of the coupling nut 6 becomes excessive, of the pair of projecting pieces 33a and 33b. Since only one of the projecting pieces comes into contact with the stopper projecting piece 38, the stopper projecting piece 38 restricts elastic deformation of one of the pair of projecting pieces 33a and 33b.

3A to 3D show a key ring 31 in the optical connector 1 according to the second embodiment of the present invention.
The key ring 31 according to the second embodiment of the present invention is protruded from the key ring main body 32 and the key ring main body 32, and is inserted into and engaged with the key groove 23 of the receiving side optical connector 22, A key 33, which is a pair of projecting pieces 33a, 33b that can be elastically deformed in the groove width direction of the key groove 23, and a key ring main body 32 are provided so as to be positioned in a slit 47 between the pair of projecting pieces 33a, 33b. When the pair of projecting pieces 33a and 33b are inserted into and engaged with the key groove 23, the stoppers abut against at least one of the pair of projecting pieces 33a and 33b and restrict elastic deformation of the projecting pieces. And a projecting piece 43.
Since the pair of projecting pieces 33a and 33b can be elastically deformed, the difference in the groove widths of the various key grooves 23 can be absorbed.

  The stopper protrusion 43 has a wide bar shape as compared with the first embodiment of the present invention, and the protrusion length of the stopper protrusion 43 is the length of the pair of protrusions 33a and 33b in the protrusion direction. It is shorter than this.

  The inner side surfaces 48a and 48b of the pair of projecting pieces 33a and 33b on the side in contact with the stopper projecting piece 43 have steps 46a and 46b between the projecting piece base end portions 45a and 45b and the projecting piece front end portions 44a and 44b. Yes, the protruding piece tip end portions 44a and 44b are wider than the protruding piece base end portions 45a and 45b, and the slit 47 between the pair of protruding pieces 33a and 33b has a protruding piece on the protruding piece base end portions 45a and 45b side. The stopper protrusion 43 is located within the protrusion base end portions 45a and 45b side of the slit 47, which is wider than the distal end portions 44a and 44b.

  As shown in FIG. 3C, when the pair of protrusions 33a and 33b as the key 33 is inserted into the key groove 23 of the receiving side optical connector 22, each of the pair of protrusions 33a and 33b By contacting the tip of the piece 43, the elastic deformation of the pair of protruding pieces 33a and 33b is restricted by the stopper protruding piece 43.

  In addition, when the pair of projecting pieces 33 a and 33 b as the key 33 is inserted into the key groove 23 in the receiving side optical connector 22, each of the pair of projecting pieces 33 a and 33 b contacts the tip end portion of the stopper projecting piece 43. It is possible that they will not touch. In this case, as shown in FIG. 3D, when the key 33 is obliquely inserted into the key groove 23 or the coupling nut 6 is tightened excessively, the pair of projecting pieces 33a and 33b Since only one of the projecting pieces comes into contact with the stopper projecting piece 43, the stopper projecting piece 43 restricts elastic deformation of one of the pair of projecting pieces 33a and 33b.

  In addition, since the slit 47 is provided so as to enter the projecting piece base end portions 45a and 45b, and the stopper projecting piece 43 is provided in the slit 47, the stopper projecting piece 38 in the first embodiment of the present invention, The stopper protrusion 43 in the second embodiment of the present invention can be widened, and the stopper protrusion 43 can sufficiently reinforce the pair of protrusions 33a and 33b. When the coupling nut 6 in the FC type optical connector is rotated and tightened with the key 33 inserted into the key groove 23, the stopper projecting piece 43 has a pair of projecting pieces 33a and 33b. At least one of the projecting pieces is abutted to reinforce the projecting piece, and the pair of projecting pieces 33a and 33b are prevented from being damaged, thereby preventing the optical connector 1 from being displaced relative to the receiving-side optical connector 22. It can enable high-precision positioning of optical fibers to be connected.

4 and 5 show the key ring 31 in the optical connector according to the third embodiment of the present invention.
The key ring 31 shown in FIG. 4 is protruded from the key ring main body 32 and the key ring main body 32 inserted into the frame 34, and is inserted into and engaged with the key groove 23 of the receiving side optical connector 22. And a key 33 which is a pair of projecting pieces 33a and 33b which can be elastically deformed in the groove width direction. On the inner side (on the slit 37 side) of the pair of projecting pieces 33a and 33b, a step is formed between the projecting piece base end portions 49a and 49b and the projecting piece tip end portions 50a and 50b, and the projecting piece base end portions 49a and 49b. Is wider than the projecting piece front end portions 50a and 50b, and due to this step, the projecting piece middle abdomen portions 51a and 51b project from the projecting piece front end portions 50a and 50b, thereby forming stopper projections 52a and 52b that abut against each other.

  The key ring 31 shown in FIG. 5 is protruded from the key ring main body 32 and the key ring main body 32 inserted into the frame 34, and is inserted into and engaged with the key groove 23 of the receiving side optical connector 22. And a key 33 which is a pair of projecting pieces 33a and 33b which can be elastically deformed in the groove width direction. On the inner side (on the slit 37 side) of the pair of projecting pieces 33a and 33b, the projecting piece middle portions 51a and 51b between the projecting piece base end portions 49a and 49b and the projecting piece distal end portions 50a and 50b have an arcuate shape. Stopper protrusions 52a and 52b are formed, and these stopper protrusions 52a and 52b can contact each other.

  In the key ring 31 shown in FIGS. 4 and 5, when a pair of protrusions 33a and 33b as the key 33 is inserted into the key groove 23 in the receiving side optical connector 22, the stopper protrusion 52a in the pair of protrusions 33a and 33b. , 52b are in contact with each other, so that the elastic deformation of the pair of projecting pieces 33a, 33b is restricted.

  Further, when the key 33 is obliquely inserted into the key groove 23 or when the coupling nut 6 is tightened excessively, the stopper projections 52a and 52b of the pair of projecting pieces 33a and 33b come into contact with each other. Thus, the elastic deformation of the pair of projecting pieces 33a and 33b is restricted.

1 is a perspective view showing an optical connector according to an embodiment of the present invention. It is a figure which shows the key ring by 1st Embodiment of this invention. It is a figure which shows the key ring by 2nd Embodiment of this invention. It is a figure which shows the key ring by 3rd Embodiment of this invention. It is a figure which shows the key ring by 3rd Embodiment of this invention. It is a figure which shows the optical connector as a prior art. It is a perspective view which shows the key ring as a prior art. It is a figure which shows the key ring as a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical connector, 8 ... Ferrule, 22 ... Receiving side optical connector, 23 ... Keyway, 30 ... Optical connector, 31 ... Key ring (key parts), 32 ... Key ring body (base part), 33a, 33b ... Pair of protrusions, 33 ... Key, 38 ... Stopper protrusion, 39a, 39b ... Projection base end, 40a, 40b ... Projection tip, 41a, 41b ... Projection Middle abdomen, 43 ... Stopper protrusion, 45a, 45b ... Protrusion base end, 52a, 52b ... Stopper protrusion

Claims (3)

A cylindrical frame, and a ferrule accommodated in the frame by restricting rotation around the axis relative to the frame; and inserting the frame and the ferrule into a receiving optical connector; In the optical connector connected to the receiving side optical connector by positioning around the axis by inserting and engaging a fixed key part into the key groove of the receiving side optical connector,
The key component includes a base portion fixed to the frame and a pair of protrusions that protrude from the base portion and that can be inserted into and engaged with the key groove and elastically deformed in the groove width direction of the key groove. A key that is a piece, and is protruded from the base portion, is positioned between the pair of protrusions, and is elastically deformed by contacting at least one of the pair of protrusions. An optical connector, comprising: a stopper projecting piece for regulating The length of the stopper protruding piece in the protruding direction is shorter than the length of the pair of protruding pieces in the protruding direction, and the stopper protruding piece is a protruding piece base end in at least one of the pair of protruding pieces. The optical connector according to claim 1, wherein the optical connector abuts against a middle part of the protruding piece between the protrusion and the tip of the protruding piece. A cylindrical frame, and a ferrule accommodated in the frame by restricting rotation around the axis relative to the frame; and inserting the frame and the ferrule into a receiving optical connector; In the optical connector connected to the receiving side optical connector by positioning around the axis by inserting and engaging a fixed key part into the key groove of the receiving side optical connector,
The key component includes a base portion fixed to the frame and a pair of protrusions that protrude from the base portion and that can be inserted into and engaged with the key groove and elastically deformed in the groove width direction of the key groove. An optical connector comprising: a key that is a piece; and a stopper projection that is provided on each of the pair of projecting pieces and restricts elastic deformation of the projecting pieces by contacting each other.

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