JP2008268280A - Optical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical connector capable of suppressing deterioration of characteristics due to external force.
An optical connector (1) includes a ferrule (5) that holds a tip portion of an optical fiber (2) exposed from a jacket (3) of a drop cable (4), and a cable that is disposed on the rear side of the ferrule (5) and fixes the jacket (3). And a fixing member 6. Near the rear end of the ferrule 5, two connection protrusions 9 for connecting the ferrule 5 to the cable fixing member 6 are provided. In the vicinity of the front end portion of the cable fixing member 6, two protrusion receiving hole portions 15 that are respectively engaged with the connection protrusions 9 of the ferrule 5 are formed. The protrusion receiving hole 15 has a certain amount of clearance with respect to the connecting protrusion 9. Thereby, the ferrule 5 is connected so as to be relatively movable with respect to the cable fixing member 6.
[Selection] Figure 1

Description

  The present invention relates to an optical connector for connecting optical fibers to each other.

As a conventional optical connector, for example, as described in Patent Document 1, an optical cable mounting portion for bonding and fixing an optical cable covering layer is formed integrally with a ferrule on the rear end side of the ferrule. .
JP 2005-114991 A

  However, in the above prior art, since the ferrule and the optical cable mounting portion are integrated, for example, when the optical cable is bent, an external force applied to the optical cable is directly transmitted to the ferrule, and the ferrule moves without necessity. For example, when such a connection occurs when the ferrules are brought into contact with each other, an angle deviation of the ferrule occurs and the connection loss of the optical fiber increases.

  The objective of this invention is providing the optical connector which can suppress the characteristic deterioration by external force.

  The present invention relates to an optical connector connected to an optical cable covering an optical fiber with a jacket, a ferrule that holds the tip portion of the optical fiber exposed from the jacket, a cable fixing member to which the jacket is fixed, And a connecting means for connecting the ferrule so as to be relatively movable with respect to the cable fixing member.

  In such an optical connector of the present invention, the optical cable is connected to the optical connector by providing a connecting means for connecting the ferrule so as to be movable relative to the cable fixing member. When some external force is applied to the cable, the cable fixing member moves relative to the ferrule. For this reason, the external force applied to the optical cable is not directly transmitted to the ferrule, but is relaxed by the connecting means and transmitted to the ferrule. Thereby, since the amount of deviation of the ferrule when an external force is applied to the optical cable is reduced, it is possible to suppress the deterioration of the optical connector characteristics due to the external force.

  Preferably, the connecting means includes a connecting protrusion provided on one of the ferrule and the cable fixing member, and a connecting protrusion provided on the other of the ferrule and the cable fixing member so as to have a clearance with respect to the connecting protrusion. And a protrusion receiving portion that engages.

  In the case of such a configuration, the connection protrusion is rattled by the clearance between the protrusion receiving portion and the connection protrusion, so that the cable fixing member is reliably movable with respect to the ferrule. Therefore, the external force applied to the optical cable can be relaxed and transmitted to the ferrule while minimizing the number of parts of the optical connector.

  The connecting means includes a connecting member for connecting the ferrule and the cable fixing member, a first connecting protrusion provided on one end portion of the ferrule and the connecting member, and the other one end portion of the ferrule and the connecting member. A first protrusion receiving portion that engages with the first connection protrusion so as to have a clearance with respect to the first connection protrusion, and is provided at one of the cable fixing member and the other end portion of the connection member. A second projection that is provided on the other of the cable fixing member and the other end portion of the coupling member and engages with the second coupling projection so as to have a clearance with respect to the second coupling projection. You may have a receiving part.

  In the case of such a configuration, the first coupling projection is rattled by the clearance between the first projection receiving portion and the first coupling projection, and the second projection receiving portion is coupled to the second coupling projection. Since the second connecting projection rattles due to the clearance with the projection, the cable fixing member is sufficiently movable with respect to the ferrule. Thus, by providing two sets of connecting portions including the connecting protrusion and the protrusion receiving portion on the front and rear, the external force applied to the optical cable can be greatly relaxed and transmitted to the ferrule.

  Preferably, a spring spring that biases the ferrule side is disposed between the ferrule and the cable fixing member.

  In this case, for example, when connecting the ferrules by matching the ferrules, the ferrule moves to the rear side (cable fixing member side) against the urging force of the spring spring, so-called ferrule back occurs. Connection can be realized. At this time, since the spring spring is disposed between the ferrule and the cable fixing member, the distance between the ferrule tip surface and the spring spring is larger than that in the case where the spring spring is disposed on the rear side of the cable fixing member. Shorter. Therefore, the amount of misalignment of the ferrule when an external force is applied to the optical cable can be further reduced.

  Furthermore, it is preferable to further include a housing that covers the ferrule and the cable fixing member, and a fiber bending space for bending the optical fiber exposed from the jacket is provided in the housing.

  In this case, since an external force is applied to the optical cable, the bending of the optical fiber that occurs when the cable fixing member moves relative to the ferrule is absorbed, so that the stress applied to the optical fiber can be reduced.

  The present invention also relates to an optical connector connected to an optical cable in which an optical fiber is covered with a jacket, and a ferrule that holds the tip portion of the optical fiber exposed from the jacket, and a cable fixing member to which the jacket is fixed And an elastic body for connecting the ferrule and the cable fixing member.

  In such an optical connector of the present invention, when an external force is applied to the optical cable in a state where the optical cable is connected to the optical connector by connecting the ferrule and the cable fixing member with the elastic body, the elastic body Elastically deforms to absorb the external force. For this reason, the external force applied to the optical cable is not directly transmitted to the ferrule, but is relaxed by the elastic body and transmitted to the ferrule. Thereby, the characteristic deterioration of the optical connector by the external force added to an optical connector can be suppressed.

  Preferably, the elastic body is a ring-shaped rubber member. In this case, the external force applied to the optical cable can be relaxed and transmitted to the ferrule while reliably connecting the ferrule and the cable fixing member with a simple structure.

  According to the present invention, it is possible to suppress deterioration in characteristics due to external force applied to the optical connector, for example, increase in connection loss when performing connector connection.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an optical connector according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a first embodiment of an optical connector according to the present invention. In the figure, a drop cable 4 formed by covering an optical fiber 2 with a jacket 3 is connected to the optical connector 1 of the present embodiment.

  As shown in FIGS. 1 and 2, the optical connector 1 includes a ferrule 5 having a substantially cylindrical shape, and a cable fixing member 6 disposed on the rear side of the ferrule 5. The ferrule 5 is made of, for example, zirconia, and the cable fixing member 6 is made of, for example, a resin such as PBT.

  The ferrule 5 has a fiber insertion hole 5 a through which the optical fiber 2 exposed from the jacket 3 of the drop cable 4 is inserted, and holds the tip portion of the optical fiber 2. A flange 7 is provided on the outer peripheral surface of the ferrule 5, and a plurality of protrusions 8 are formed on the flange 7.

  Further, two connection projections 9 for connecting the ferrule 5 to the cable fixing member 6 are provided in the vicinity of the rear end portion of the ferrule 5. These connecting projections 9 have a cylindrical shape as shown in FIG.

  A stop ring 10 is disposed around the rear portion of each protrusion 8 in the ferrule 5. An annular protrusion 11 projects from the inner peripheral surface of the stop ring 10. Between each protrusion 8 and the annular protrusion 11, a spring spring 12 that is biased toward the tip (front end) side of the ferrule 5 is disposed. When the optical connector 1 is coupled to another optical connector, the ferrules of both optical connectors are brought into contact with each other. At this time, the so-called ferrule back in which the ferrule 5 moves rearward against the biasing force of the spring spring 12 is used. Therefore, the stability of connection between the optical connectors is improved.

  The ferrule 5 and the stop ring 10 are covered with a housing 13. The housing 13 is fixed to the stop ring 10 by locking means (not shown). As a result, the ferrule 5 can move in the connector front-rear direction with respect to the stop ring 10 and the housing 13. On the inner peripheral surface of the housing 13, there is provided a protrusion 14 that locks the flange 7 of the ferrule 5 and defines the protrusion amount of the housing 5 with respect to the housing 13.

  The cable fixing member 6 is connected to the rear end portion of the ferrule 5 via two connection protrusions 9. At one end portion (front end portion) of the cable fixing member 6, a ferrule housing portion 14 into which the rear end portion of the ferrule 5 is inserted is provided. Further, in the vicinity of the front end portion of the cable fixing member 6, two projection receiving hole portions 15 that respectively engage with the connection projections 9 of the ferrule 5 are formed so as to face each other with the ferrule housing portion 14 interposed therebetween.

  At this time, the projection receiving hole 15 is fitted to the connection projection 9 with a certain amount of clearance with respect to the connection projection 9 in the three axial directions (front-rear direction, width direction, and vertical direction). It is configured. For this reason, the connecting projection 9 has a clearance from the projection receiving hole 15. Thereby, the ferrule 5 is connected so as to be relatively movable with respect to the cable fixing member 6.

  A cable housing recess 16 for holding and fixing the drop cable 4 is provided on the rear side of the ferrule housing portion 14 in the cable fixing member 6. A pair of blade parts (demon part) 17 for holding the jacket 3 of the drop cable 4 is provided on both side surfaces of the cable housing recess 16. The outer cover 3 is fixed to the cable fixing member 6 by the blades 17 biting into the outer cover 3 so as to sandwich the outer cover 3.

  The pair of blade portions 17 are formed on the rear portions of both side surfaces of the cable housing recess 16. The space between each blade portion 17 and the ferrule housing portion 14 in the cable housing recess 16 forms a fiber bending space 18 for bending the optical fiber 2 exposed from the jacket 3 of the drop cable 4. Yes. The length (length in the connector longitudinal direction) L of the fiber bending space 18 is preferably 20 mm or more. The reason will be described in detail later.

  A fiber insertion slit 19 is formed at the front end of the cable fixing member 6 so as to communicate with the ferrule housing part 14 and the cable housing recess 16.

  A lid portion 20 is provided on the upper surface of the cable fixing member 6 (the surface on the opening side of the cable housing recess 16). The housing 13, the cable fixing member 6, and the lid portion 20 are covered with a knob housing 21.

  Next, a procedure for assembling the optical connector 1 configured as described above will be described. First, as shown in FIG. 4, the stop ring 10 is passed through the drop cable 4 and a spring spring 12 is attached to the ferrule 5. Then, the optical fiber 2 exposed from the jacket 3 of the drop cable 4 is inserted into the fiber insertion hole 5 a of the ferrule 5.

  Subsequently, as shown in FIG. 5, the housing 13 is put on the ferrule 5. Then, as shown in FIG. 6, the stop ring 10 is moved toward the tip of the drop cable 4 and fitted into the housing 13. Subsequently, as shown in FIG. 7, the optical fiber 2 exposed from the jacket 3 of the drop cable 4 is put into the ferrule housing portion 14 and the cable housing recess 16 through the fiber insertion slit 19 of the cable fixing member 6.

  In this state, as shown in FIG. 8, the rear end portion of the ferrule 5 is inserted into the ferrule housing portion 14 of the cable fixing member 6, and the ferrule 5 and the cable fixing member 6 are connected. At this time, when the rear end portion of the ferrule 5 is pushed toward the ferrule housing portion 14, the front end portion of the cable fixing member 6 is elastically deformed outward, and then the connection protrusion 9 of the ferrule 5 is received by the protrusion of the cable fixing member 6. When fitted into the hole 15, the front end of the cable fixing member 6 returns to its original state. For this reason, in the state in which the ferrule 5 and the cable fixing member 6 are connected, both are not easily detached.

  Subsequently, as shown in FIG. 9, the drop cable 4 is inserted into the cable housing recess 16 from above the cable fixing member 6 so that a predetermined length of fiber bending space 18 is secured in the cable housing recess 16 of the cable fixing member 6. Push in. Thereby, the jacket 3 of the drop cable 4 is fixed to the cable fixing member 6. At this time, even if the connecting portion between the ferrule 5 and the cable fixing member 6 moves due to rattling, the optical fiber 2 is bent in advance in the fiber bending space 18 so that the tensile force generated in the optical fiber 2 is kept below the allowable value. It is desirable to keep it.

  And after mounting the cover part 20 on the cable fixing member 6, as shown in FIG. 10, the knob housing 21 is mounted | worn. Thus, the optical connector 1 with a drop cable is completed.

  By the way, when the ferrule and the cable fixing member are completely integrated, when an external force is applied to the drop cable by bending the drop cable, for example, when the connector is connected, the external force is directly applied to the cable fixing member. Will join the ferrule. For this reason, the ferrule is shaken to cause an angle deviation of the ferrule, and the force necessary for physical contact between the ferrules is dispersed, so that the connection loss of the optical fiber increases.

  On the other hand, in this embodiment, the ferrule 5 and the cable fixing member 6 are not completely fixed, but the ferrule 5 is connected to the cable fixing member 6 so as to be relatively movable. For this reason, even when an external force is applied to the drop cable 4 during connector connection, the external force is absorbed by the connecting portion between the ferrule 5 and the cable fixing member 6. Accordingly, since the external force applied to the drop cable 4 is relaxed and transmitted to the ferrule 5, the fluctuation of the ferrule 5 due to the external force is reduced, and accordingly, the angular deviation of the ferrule 5 is reduced.

  Further, since the spring spring 12 for the ferrule back is disposed between each protrusion 8 of the ferrule 5 and the annular protrusion 11 of the stop ring 10, the distance between the tip surface of the ferrule 5 and the spring spring 12 is minimized. It can be suppressed. For this reason, the angular deviation of the ferrule 5 when an external force is applied to the drop cable 4 can be further reduced.

  As described above, since the angle deviation of the ferrule 5 is reduced, dispersion of force necessary for physical contact between the ferrules is suppressed. Thereby, the increase in the connection loss of the optical fiber 2 can be suppressed, and the connection itself due to the connector coupling can be reliably prevented from being disconnected.

  Further, by securing the fiber bending space 18 in the cable housing recess 16 of the cable fixing member 6, the optical fiber 2 generated when the connecting portion between the ferrule 5 and the cable fixing member 6 is moved by applying an external force to the drop cable 4. Can absorb the bending. Thereby, the stress applied to the optical fiber 2 can be reduced.

  Here, FIG. 11 shows the relationship between the push amount of the optical fiber, the radius of curvature of the optical fiber, and the length of the fiber bending space. The relationship shown in the figure is obtained by an experiment conducted by the present inventors.

  In general, it is considered that the bending (deflection) loss of an optical fiber is preferably suppressed to 0.05 dB or less. In consideration of the bending loss of the optical fiber and the lifetime of the optical fiber, it is preferable that the radius of curvature of the optical fiber is 10 mm or more. Furthermore, from the viewpoint of connector design and the like, the push amount of the optical fiber is required to be about 0.8 to 1.0 mm. From the above, it can be said that the length L of the fiber bending space 18 is preferably 20 mm or more, and particularly preferably 25 mm or more.

  Further, since the connecting portion between the ferrule 5 and the cable fixing member 6 has a movable structure, for example, when pulling and laying the optical connector 1 in the pipeline, it is in a state before the knob housing 21 is mounted. If so, the optical connector 1 is less likely to be caught by the bent portion of the pipeline.

  In addition, the structure of the connection part of the ferrule 5 and the cable fixing member 6 is not limited to what is shown in FIG. 3, and can be variously modified. The modification of the connection structure of the ferrule 5 and the cable fixing member 6 is shown in FIG.12 and FIG.13.

  A ferrule 5 shown in FIG. 12A has two arcuate connecting projections 23 along the outer peripheral surface of the ferrule 5. The ferrule 5 shown in FIG. 12B has two spheres (including a perfect sphere and a hemisphere) connecting projections 24.

  The ferrule 5 shown in FIG. 13A has an annular connecting projection 25. In this case, an annular protrusion receiving groove that engages with the connecting protrusion 25 is provided in the cable fixing member 6. The ferrule 5 shown in FIG. 13B has an annular groove portion 26 in place of the above-described various connection protrusions. In this case, an annular coupling protrusion that engages with the annular groove 26 or a plurality of coupling protrusions having a columnar shape, a spherical shape, or the like is provided.

  FIG. 14 is a cross-sectional view showing a second embodiment of the optical connector according to the present invention. In the figure, the same or equivalent members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, the optical connector 30 of the present embodiment includes a ferrule 5, a cable fixing member 31 disposed on the rear side of the ferrule 5, and a connecting member 32 that connects the ferrule 5 and the cable fixing member 31. Yes. The ferrule 5 has two arcuate connecting projections 23 as shown in FIG.

  As shown in FIG. 15, the cable fixing member 31 has a cable housing recess 33 for holding and fixing the drop cable 4. A pair of blade portions 34 for holding the jacket 3 of the drop cable 4 is provided on both side surfaces of the cable housing recess 33 (see FIG. 16). The blade portion 34 has the same structure as the blade portion 17 described above. A pair of connecting portions 35 protrudes from one end surface (front end surface) of the cable fixing member 31. For example, cylindrical connection protrusions 36 are provided on the inner surface of each connection portion 35 so as to face each other.

  The connecting member 32 includes a pair of connecting plates 37 and a reinforcing plate 38 fixed to each connecting plate 37. Each connecting plate 37 is formed to bend outward from the portion of the reinforcing plate 38.

  In the vicinity of one end of each connecting plate 37, a projection receiving hole 39 that engages with the connecting projection 23 of the ferrule 5 is formed. The protrusion receiving hole 39 is configured to fit the connecting protrusion 23 with a certain amount of clearance in the three axial directions with respect to the connecting protrusion 23. Further, in the vicinity of the other end portion of each connecting plate 37, a projection receiving hole portion 40 that engages with the connecting projection 36 of the connecting portion 35 is formed. The protrusion receiving hole portion 40 is configured to fit the connecting protrusion 36 with a certain amount of clearance in the three axial directions with respect to the connecting protrusion 36. As described above, the ferrule 5 is connected to the cable fixing member 31 via the connecting member 32 so as to be relatively movable.

  Other structures of the optical connector 30 are the same as those of the optical connector 1 described above. At this time, the space between the front end surface of the cable fixing member 31 and the rear end surface of the ferrule 5 forms a fiber bending space 41 for bending the optical fiber 2 exposed from the outer jacket 3 of the drop cable 4. Yes. As described above, the length L of the fiber bending space 41 is desirably 20 mm or more.

  In the present embodiment as described above, since the ferrule 5 and the cable fixing member 31 are connected so as to be relatively movable via the connecting member 32, when performing connector connection, the drop is performed. Even if an external force is applied to the cable 4, the external force is relaxed and transmitted to the ferrule 5. At this time, the ferrule 5 and the connecting member 32 are connected so as to be movable, and the cable fixing member 31 and the connecting member 32 are connected so as to be movable. That is, since there are two connecting portions of the movable structure on the front and rear, the external force applied to the drop cable 4 is greatly relaxed and applied to the ferrule 5. As a result, since the angle shift of the ferrule 5 is sufficiently reduced, an increase in connection loss of the optical fiber 2 can be further suppressed.

  In the second embodiment, the connection protrusion 23 is provided on the ferrule 5 and the connection protrusion 36 is provided on the cable fixing member 31, and the protrusion receiving hole 39 that engages with the connection protrusion 23 and the connection protrusion 36. The projection receiving hole 40 is formed in the connecting member 32. However, the present invention is not particularly limited to this structure, and two sets of connecting projections are provided on the connecting member 32, and the protrusion receiving portion that engages with each set of connecting projections is a ferrule. 5 and the cable fixing member 31 may be formed respectively.

  FIG. 17 is a cross-sectional view showing a third embodiment of the optical connector according to the present invention. In the figure, the same or equivalent members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, an optical connector 50 of the present embodiment includes a ferrule 51 having a substantially cylindrical shape, a cable fixing member 52 disposed on the rear side of the ferrule 51, and an elastic body connected to the ferrule 51 and the cable fixing member 52. 53.

  The ferrule 51 has a fiber insertion hole 51 a through which the optical fiber 2 exposed from the jacket 3 of the drop cable 4 is inserted, and holds the tip portion of the optical fiber 2. The material of the ferrule 51 is, for example, zirconia.

  As shown in FIG. 18, the cable fixing member 52 has a cable receiving recess 54 for holding and fixing the drop cable 4. A pair of blade portions 55 for holding the jacket 3 of the drop cable 4 is provided on both side surfaces of the cable housing recess 54. The blade portion 55 has the same structure as the blade portion 17 described above. The material of the cable fixing member 52 is a resin such as PBT, for example.

  The elastic body 53 is a ring-shaped rubber member and is joined to the rear end surface of the ferrule 51 and the front end surface of the cable fixing member 52. As the material of the elastic body 53, for example, a highly elastic resin or the like may be used in addition to rubber. The inner space of the elastic body 53 forms a fiber bending space 56 for bending the optical fiber 2 exposed from the jacket 3 of the drop cable 4.

  Thus, the ferrule 51 and the cable fixing member 52 are integrated via the elastic body 53 to constitute a cable fixing type ferrule. As a method of manufacturing such a cable fixing type ferrule, for example, after making the ferrule 51 and the cable fixing member 52 individually, the rubber material is injection-molded in a state where these are put in a molding machine, and the ferrule 51 and the cable The fixing member 52 is integrated.

  The ferrule 51 and the elastic body 53 are covered with a housing 57. On the inner peripheral surface of the housing 57, a protrusion 58 that defines the protrusion amount of the ferrule 51 with respect to the housing 57 is provided.

  A restraining member 59 having an L-shaped cross section is disposed behind the housing 57. Between the rear end surface of the cable fixing member 52 and the holding member 59, a spring spring 60 is provided that biases the front side (cable fixing member 52 side). By providing the spring spring 60, ferrule back occurs when the connectors are coupled, so that the optical connection between the optical connectors is stabilized. The housing 57, the cable fixing member 52, and the holding member 59 are covered with a knob housing 61.

  In the present embodiment as described above, since the ferrule 51 and the cable fixing member 52 are fixed via the elastic body 53, when an external force is applied to the drop cable 4, an external force is applied to the cable fixing member 52. The elastic body 53 is elastically deformed so that the external force is absorbed by the elastic body 53. For this reason, since the external force applied to the drop cable 4 is relaxed and transmitted to the ferrule 51, the fluctuation of the ferrule 51 due to the external force is reduced, and accordingly, the angular deviation of the ferrule 51 is reduced. Thereby, similarly to 1st Embodiment, the increase in the connection loss of the optical fiber 2 can be suppressed.

  The present invention is not limited to the above embodiment. For example, in the first and second embodiments, the ferrule back spring spring 12 is disposed between each protrusion 8 of the ferrule 5 and the annular protrusion 11 of the stop ring 10. A spring may be arranged behind the cable fixing member.

  Moreover, although the drop cable 4 is connected to the optical connector 1 of the said embodiment, it cannot be overemphasized that this invention is applicable also to the optical connector to which optical cables other than a drop cable are connected.

It is sectional drawing which shows 1st Embodiment of the optical connector which concerns on this invention. It is a perspective view which shows the connection state of the ferrule shown in FIG. 1, and a cable fixing member. FIG. 3 is a partially enlarged perspective view of the ferrule shown in FIG. 2. It is a perspective view which shows the assembly process of the optical connector shown in FIG. It is a perspective view which shows the assembly process of the optical connector shown in FIG. It is a perspective view which shows the assembly process of the optical connector shown in FIG. It is a perspective view which shows the assembly process of the optical connector shown in FIG. It is a perspective view which shows the assembly process of the optical connector shown in FIG. It is a perspective view which shows the assembly process of the optical connector shown in FIG. It is a perspective view which shows the assembly process of the optical connector shown in FIG. It is a graph which shows the relationship between the pushing amount of an optical fiber, the curvature radius of an optical fiber, and the length of fiber bending space. It is a perspective view which shows the modification of the connection part structure of the ferrule shown in FIG. It is a perspective view which shows the other modification of the connection part structure of the ferrule shown in FIG. It is sectional drawing which shows 2nd Embodiment of the optical connector which concerns on this invention. It is a perspective view which shows the connection state of the ferrule shown in FIG. 14, and a cable holding member. FIG. 16 is a perspective view illustrating a state where an optical cable is fixed to the cable fixing member illustrated in FIG. 15. It is sectional drawing which shows 3rd Embodiment of the optical connector which concerns on this invention. It is a perspective view which shows the connection state of the ferrule shown in FIG. 17, and a cable fixing member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Optical connector, 2 ... Optical fiber, 3 ... Jacket | cover, 4 ... Drop cable (optical cable), 5 ... Ferrule, 6 ... Cable fixing member, 9 ... Connection protrusion (connection means), 12 ... Spring spring, 15 ... Protrusion receiving hole (connecting means), 18 ... Fiber bending space, 21 ... Knob housing, 23 ... Connecting protrusion (first connecting protrusion, connecting means), 24 ... Connecting protrusion (connecting means), 25 ... For connecting Projection (connecting means), 26 ... annular groove (projection receiving part, connection means), 30 ... optical connector, 31 ... cable fixing member, 32 ... connection member (connecting means), 36 ... connection projection (second connection projection) , Coupling means), 39 ... projection receiving hole (first projection receiving part, coupling means), 40 ... projection receiving hole (second projection receiving part, coupling means), 41 ... fiber bending space, 50 ... optical connector, 51 ... Ferrule, 5 ... cable fixing member, 53 ... elastic body.

Claims (7)

In an optical connector connected to an optical cable that covers an optical fiber with a jacket,
A ferrule that holds the tip portion of the optical fiber exposed from the jacket;
A cable fixing member to which the jacket is fixed;
An optical connector comprising: a coupling means for coupling the ferrule so as to be relatively movable with respect to the cable fixing member.   The connecting means is provided on one of the ferrule and the cable fixing member, and on the other of the ferrule and the cable fixing member, and has a clearance with respect to the connecting protrusion. The optical connector according to claim 1, further comprising a protrusion receiving portion that engages with the connection protrusion.   The connection means includes a connection member that connects the ferrule and the cable fixing member, a first connection protrusion provided on one end side portion of the ferrule and the connection member, the ferrule and the connection member. A first protrusion receiving portion that is provided on the other end portion of the first engagement portion and engages with the first connection protrusion so as to have a clearance with respect to the first connection protrusion; and the cable fixing member and the connection member. A second connection protrusion provided on one of the other end portions, and the other of the cable fixing member and the other end portion of the connection member, and has a clearance with respect to the second connection protrusion. The optical connector according to claim 1, further comprising: a second protrusion receiving portion that engages with the second connection protrusion.   The optical connector according to any one of claims 1 to 3, wherein a spring spring that biases the ferrule side is disposed between the ferrule and the cable fixing member. A housing that covers the ferrule and the cable fixing member;
The optical connector according to claim 1, wherein a fiber bending space for bending the optical fiber exposed from the jacket is provided in the housing. In an optical connector connected to an optical cable that covers an optical fiber with a jacket,
A ferrule that holds the tip portion of the optical fiber exposed from the jacket;
A cable fixing member to which the jacket is fixed;
An optical connector comprising: an elastic body that connects the ferrule and the cable fixing member. The optical connector according to claim 6, wherein the elastic body is a ring-shaped rubber member.

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