JP2020101668A - Optical connector and harness - Google Patents

Abstract

To suppress falling of a boot out of a housing.SOLUTION: An optical connector includes a housing 6 having a fitting section capable of fitting to a mating connector at one end, and a boot 7 attached to the other end of the housing 6. In the housing 6, a boot guide projection 41 is formed projecting in a direction perpendicular to a mating direction with the mating connector in a columnar fashion. A boot guide receiving section 57 is formed in the boot 7 as a through hole in which the boot guide projection 41 is accommodated.SELECTED DRAWING: Figure 13

Description

The present invention relates to an optical connector and a harness.

Japanese Patent Laid-Open No. 5-66321 discloses a metal joint having a ferrule 101 having a spherical outer surface 100 and a spherical engaging portion 102 slidably engaged with the spherical outer surface 100 of the ferrule 101. And an optical connector 104 including the sleeve 103. According to this configuration, it is possible to prevent disconnection of the core 106 of the optical fiber cord 105.

However, in the configuration of Patent Document 1 described above, when an external force acts on the joint sleeve 103, the joint sleeve 103 may fall off the ferrule 101.

An object of the present disclosure is to provide a technique for suppressing the boot from falling out of the housing.

According to a first aspect of the present disclosure, the housing and the boot include a housing having at one end a fitting portion capable of fitting with a fitting target, and a boot attached to the other end of the housing. A boot protrusion protruding in a column shape in a direction intersecting with the fitting direction to the fitting target is formed on one of the two, and a through hole for accommodating the boot protrusion on the other. Alternatively, an optical connector is provided in which a boot protrusion housing portion that is a depression is formed.
Preferably, there is a gap between the outer peripheral surface of the boot protrusion and the inner peripheral surface of the boot protrusion accommodating portion.
Preferably, when viewed along the protruding direction of the boot protrusion, the boot protrusion accommodating portion is formed to extend slenderly along a predetermined direction.
Preferably, the boot protrusion accommodating portion has two partition screens that partition the boot protrusion accommodating portion in the longitudinal direction of the boot protrusion accommodating portion.
Preferably, when viewed along the projecting direction, the boot protrusion housing portion extends in an arc shape.
Preferably, one of the housing and the boot has a plurality of boot protrusions, and the other has a plurality of boot protrusion accommodating portions corresponding to the plurality of boot protrusions. When formed along the protruding direction, the plurality of boot protrusion housing portions extend in an arc shape along a single arc.
Preferably, the boot has an accommodated portion to be accommodated in the housing, and the accommodated portion has an annular facing surface that faces an inner wall surface of the housing, and the annular facing surface has an annular facing surface. Has a rib that annularly contacts the inner wall surface of the housing.
Preferably, at least two ribs are formed on the annular facing surface at positions separated from each other in the fitting direction.
According to a second aspect of the present disclosure, the housing includes a housing having at one end a fitting portion capable of fitting with a fitting target, and a crimping member having a crimping portion that is crimped to the outer cover of the optical cable. One of the pressure-bonding member and the pressure-bonding member is formed with a pressure-bonding projection protruding in a columnar shape in a direction intersecting with the fitting direction of the fitting target object, and the other is provided with the pressure-bonding projection. Provided is an optical connector in which a crimping protrusion housing portion that is a through hole or a recess is formed.
Preferably, at least one of the crimping protrusion and the crimping protrusion accommodating portion is formed in a cylindrical shape.
Preferably, it further comprises a crimp support member disposed inside the crimp portion of the crimp member and insertable into the outer cover of the optical cable.
The optical connector, and the optical cable, the optical connector further comprises a ferrule, the optical cable, an optical fiber cord, a tensile strength member vertically attached to the optical fiber cord, and the optical fiber cord, The outer cover covering the tensile strength member, and a slit is formed in the outer cover, the optical fiber cord is pulled out from the optical cable through the slit, the outside of the crimp portion of the crimp member A harness is provided through which leads to the ferrule.

According to the present disclosure, it is possible to prevent the boot from falling off the housing.

It is a perspective view of a harness. It is a perspective view of a harness with a part of housing removed. It is sectional drawing of an optical cable. It is an exploded perspective view of a harness. It is a perspective view showing the state before attaching boots to a lower housing. It is a perspective view showing the state after attaching boots to a lower housing. It is a top view of boots. It is a top view showing the state after attaching boots to a lower housing. It is a perspective view which shows a pressure bonding member and a pressure bonding support member. It is a partially notched perspective view which shows the state which inserted the pressure bonding support member into the pressure bonding member. It is a partially cutaway perspective view of a harness. It is a partially cutaway perspective view of a harness. It is a partially cutaway plan view of the harness. It is the figure which simplified FIG. 2 of patent document 1.

Hereinafter, preferred embodiments of the present disclosure will be described with reference to FIGS. 1 to 13. 1 and 2 are perspective views of the harness 1.

As shown in FIGS. 1 and 2, the harness 1 includes an optical cable 2 and an optical connector 3 attached to an end of the optical cable 2.

As shown in FIG. 1, the optical connector 3 includes a resin housing 6 having at one end a fitting portion 5 capable of fitting with a mating connector 4 (fitting object) indicated by a chain double-dashed line, and other housings. The boot 7 made of resin attached to the end is provided as a main configuration. The optical cable 2 is pulled out from the housing 6 via the boot 7.

The mating connector 4 is a connector mounted on FA (Factory Automation) equipment that requires high-speed transmission, such as industrial robots and machine tools. Depending on the installation environment of the FA equipment, there are cases where a sufficient wiring space cannot be secured, and in that case, the optical cable 2 must be bent tightly. On the other hand, the allowable bending radius of the optical cable 2 is specified by the specifications, and the bending radius of the optical cable 2 cannot be made as small as possible. Therefore, the optical connector 3 is required to have a position where the bending of the optical cable 2 can start, that is, a bending start position as close to the fitting portion 5 as possible.

Here, the optical cable 2 adopted in the present embodiment will be described with reference to FIG. FIG. 3 shows a sectional view of the optical cable 2. The optical cable 2 is defined herein as comprising at least one optical fiber cord 8. The optical cable 2 of the present embodiment is a multi-core type optical cable, and is an outer tension member 10 (tensile member) composed of two optical fiber cords 8 and a plurality of fibers 9 vertically attached to the two optical fiber cords 8. And two optical fiber cords 8 and an outer cover 11 that covers the outer tension member 10.

Each fiber 9 is made of a material having a high Young's modulus such as aramid fiber, polyparaphenylene benzobisoxazole fiber, glass fiber, and metal fiber.

The outer cover 11 is a thermoplastic resin, a thermosetting resin, or an ultraviolet curable resin, and may be, for example, a polyvinyl chloride resin, a polyester resin, or a polyamide resin.

Each optical fiber cord 8 is configured by vertically attaching an inner tension member 14 made of a plurality of fibers 13 to a core wire 12 and covering them with a sheath 15. Instead of vertically attaching the inner tension member 14 made of a plurality of fibers 13 to the core wire 12, the core wire 12 may be covered with a coating made of the same material as the outer cover 11.

The materials of the inner tension member 14 and the sheath 15 may be those of the above-mentioned outer tension member 10 and outer skin 11, respectively.

In this embodiment, the optical cable 2 has two optical fiber cords 8, but it may have only one optical fiber cord 8 or three or more optical fiber cords 8.

Next, the optical connector 3 will be described with reference to FIG. As shown in FIG. 4, the optical connector 3 of this embodiment is a multi-fiber optical connector corresponding to the multi-fiber optical cable 2. However, not limited to this, the optical connector 3 may be a single-core type optical connector.

As shown in FIG. 4, the optical connector 3 includes a housing 6, a boot 7, two ferrules 20, two compression coil springs 21, a crimp member 22, and a crimp support member 23. ..

The housing 6 is composed of a lower housing 24 having a fitting portion 5 and an upper housing 25. An inner space 26 is formed in the housing 6 by joining the lower housing 24 and the upper housing 25 to each other by welding or adhesion.

Here, "insertion/removal direction", "connector height direction", and "connector width direction" are defined. The insertion/removal direction, the connector height direction, and the connector width direction are directions orthogonal to each other. The insertion/removal direction is a direction in which the optical connector 3 is inserted into/removed from the mating connector 4, as shown in FIG. The insertion/removal direction includes a fitting direction in which the optical connector 3 is fitted into the mating connector 4, and a removal direction in which the optical connector 3 is removed from the mating connector 4, which is a direction opposite to the fitting direction. The connector height direction is a direction in which the lower housing 24 and the upper housing 25 face each other, as shown in FIG. The connector height direction includes the upper side and the lower side. The upper side is the direction in which the upper housing 25 is present when viewed from the lower housing 24. Below is the opposite direction of above. The connector width direction is a direction orthogonal to the insertion/removal direction and the connector height direction. In the following description, the terms “upper”, “lower”, “upper surface”, “lower surface”, etc. are used, but these terms are merely used for convenience of explanation, and are limited to the posture of the optical connector 3 in an actual use state. should not be done.

Each ferrule 20 is made of metal and is housed in the internal space 26 of the housing 6 so as to be constantly pressed in the fitting direction by each compression coil spring 21. The upper housing 25 is formed with a spring retainer 27 that receives the elastic restoring force of each compression coil spring 21.

In FIG. 5, the lower housing 24 and the boot 7 are shown in an enlarged manner. As shown in FIG. 5, the lower housing 24 has the above-described fitting portion 5 in which two ferrule through holes 30 are formed, two spring support portions 31, a bottom plate 32, and two side plates 33. doing.

The two ferrule through holes 30 are holes into which the two ferrules 20 are respectively inserted (see also FIG. 4).

The two spring support portions 31 are portions that respectively support the two compression coil springs 21 and are formed in a semi-cylindrical shape.

The bottom plate 32 partitions the internal space 26 in the connector height direction, and is a portion whose plate thickness direction is parallel to the connector height direction. The bottom plate 32 has a bottom surface 32A facing upward. From the bottom plate 32, a pressure-bonding guide protrusion 40 (pressure-bonding protrusion) and two boot guide protrusions 41 (boot protrusions) are formed so as to protrude upward.

The crimping guide protrusion 40 is formed at the center of the bottom plate 32 in the connector width direction and near the fitting portion 5. The crimping guide protrusion 40 has a cylindrical shape and is formed so as to extend parallel to the connector height direction. The crimping guide protrusion 40 has an outer peripheral surface 40A.

The two boot guide protrusions 41 are formed at positions separated from each other in the connector width direction. The two boot guide protrusions 41 are arranged farther from the fitting portion 5 than the crimp guide protrusion 40. The two boot guide protrusions 41 have a columnar shape and are formed so as to extend parallel to the connector height direction. In the present embodiment, the diameter of each boot guide protrusion 41 is smaller than the diameter of the crimping guide protrusion 40. However, the diameter of each boot guide protrusion 41 may be larger than or equal to the diameter of the crimping guide protrusion 40. Each boot guide protrusion 41 has an outer peripheral surface 41A.

The two side plates 33 partition the internal space 26 in the insertion/removal direction and the connector width direction, and are formed so as to project upward from the outer edge of the bottom plate 32. The two side plates 33 are curved so as to draw an arc around the crimping guide protrusion 40 in a plan view. The two side plates 33 are arranged apart from each other in the connector width direction. A boot mounting recess 43 in which the boot 7 is arranged is formed between the two side plates 33. In the radial direction of the crimping guide protrusion 40, the side plates 33 are arranged radially outward of the corresponding boot guide protrusions 41. Each side plate 33 faces the corresponding boot guide protrusion 41 in the radial direction of the crimping guide protrusion 40. Each side plate 33 has a curved inner wall surface 33A. The curved inner wall surface 33A is a surface that curves so as to draw an arc around the crimping guide protrusion 40 in a plan view.

As shown in FIGS. 5 and 6, the boot 7 includes a housed part 50 housed in the internal space 26 of the housing 6, and a cylindrical bellows part 51 extending in the removing direction from the housed part 50 and exposed to the outside. It consists of and.

The accommodated portion 50 has a accommodated portion main body 52 and two guide arms 53.

The accommodated portion main body 52 is formed in a plate shape whose plate thickness direction is parallel to the insertion/removal direction. As shown in FIG. 6, a cable hole 54 through which the optical cable 2 is inserted is formed in the accommodated portion main body 52. The cable hole 54 is formed wide in the connector width direction when viewed along the insertion/removal direction. That is, the dimension of the cable hole 54 in the connector width direction is larger than the dimension of the cable hole 54 in the connector height direction. As shown in FIGS. 5 and 7, the accommodated portion main body 52 has an upper surface 52A, a lower surface 52B, and two side surfaces 52C. The upper surface 52A, the lower surface 52B, and the two side surfaces 52C are connected in an annular shape, and form an annular outer peripheral surface 55 (opposing surface) that surrounds the optical cable 2 shown by a chain double-dashed line in FIG. 7. The upper surface 52A faces upward and faces the inner wall surface of the upper housing 25. The lower surface 52B faces downward and faces the bottom surface 32A of the bottom plate 32 of the lower housing 24. The two side surfaces 52C face the curved inner wall surfaces 33A of the two side plates 33 shown in FIG. 5, respectively. The upper housing 25 also has a surface corresponding to the curved inner wall surface 33A of the two side plates 33 of the lower housing 24, and the two side surfaces 52C also face these surfaces of the upper housing 25. become. Then, as shown in FIG. 5, two annular ribs 56 (ribs) are formed on the annular outer peripheral surface 55. Like the annular outer peripheral surface 55, the two annular ribs 56 extend in an annular shape so as to surround the optical cable 2. The two annular ribs 56 are formed apart from each other in the insertion/removal direction.

The two guide arms 53 are formed so as to project in the fitting direction from two end portions in the width direction of the accommodated portion main body 52. The two guide arms 53 project so as to separate from each other in the fitting direction. Each guide arm 53 extends in an arc along the curved inner wall surface 33A of each side plate 33. As shown in FIG. 7, each guide arm 53 is formed with a boot guide accommodating portion 57 (boot protrusion accommodating portion). Each boot guide accommodating portion 57 is a through hole extending in a direction intersecting the insertion/removal direction. In the present embodiment, each boot guide accommodating portion 57 is a through hole extending in a direction orthogonal to the insertion/removal direction, that is, in the connector height direction. As shown in FIGS. 5 and 6, each boot guide accommodating portion 57 has each boot guide protrusion 41 inserted therein. Each boot guide accommodating portion 57 is formed such that each boot guide protrusion 41 is movable inside each boot guide accommodating portion 57. Specifically, when each boot guide accommodating portion 57 is inserted into each boot guide accommodating portion 57, each boot guide accommodating portion 57 has an inner peripheral surface 57A shown in FIG. A gap is formed between the outer peripheral surface 41A of each boot guide protrusion 41 shown.

Further, as shown in FIG. 7, each boot guide accommodating portion 57 is formed to extend in a slender shape along a predetermined direction. In the example of FIG. 7, each boot guide accommodating portion 57 is formed to extend in an arc shape along an arc 58 centered on the crimping guide protrusion 40. In the plan view of FIG. 7, the central angle of the arc drawn by each boot guide accommodating portion 57 is 5 degrees in the present embodiment. However, the central angle of the arc drawn by each boot guide accommodating portion 57 is not limited to 5 degrees. Each boot guide accommodating portion 57 has two partition screens 57B that partition the boot guide accommodating portion 57 in the longitudinal direction of the boot guide accommodating portion 57. That is, the inner peripheral surface 57A of each boot guide accommodating portion 57 includes two section screens 57B. The two section screens 57B face each other in the longitudinal direction of each boot guide accommodating portion 57 when seen in a plan view.

FIG. 8 shows a state in which the boot 7 is attached to the lower housing 24. As shown in FIG. 8, in order to attach the lower housing 24 to the boot 7, the two boot guide protrusions 41 of the lower housing 24 are inserted into the two boot guide accommodating portions 57 of the accommodated portion 50 of the boot 7, respectively. At this time, the bellows portion 51 faces the removing direction.

In this state, the boot 7 is movable with respect to the lower housing 24. Specifically, in the accommodated portion 50 of the boot 7, the boot guide accommodating portion 57 in which the boot guide protrusion 41 is accommodated draws an arc centered on the crimping guide protrusion 40. It is possible to swing around the crimping guide protrusion 40. The angular range in which the housed portion 50 of the boot 7 can swing with respect to the lower housing 24 is slightly narrower than the center angle of the arc drawn by each boot guide housing portion 57. In the present embodiment, the accommodated portion 50 of the boot 7 can swing with respect to the lower housing 24 in an angle range of 4 degrees, but is not limited thereto.

Next, the crimping member 22 and the crimping support member 23 will be described with reference to FIGS. 4, 9 and 10. As shown in FIG. 4, the crimping member 22 and the crimping support member 23 are attached to the distal end portion 2A of the optical cable 2 in the internal space 26 of the housing 6.

FIG. 9 shows a perspective view of the crimping member 22 and the crimping support member 23. FIG. 10 shows a partially cutaway perspective view of the crimping member 22 accommodating the crimping support member 23.

As shown in FIGS. 9 and 10, the crimp member 22 is made of metal and has a crimp portion 60 and a swing support portion 61. The crimp portion 60 and the swing support portion 61 are arranged in this order in the fitting direction. The crimp portion 60 and the swing support portion 61 are integrally formed. The crimp portion 60 is a so-called closed barrel that extends in a tubular shape in the insertion/removal direction, and is a portion that is crimped to the outer cover 11 of the optical cable 2 shown in FIG. 3. The rocking support portion 61 is formed with a crimping guide accommodating portion 62 (crimping protrusion accommodating portion) into which the crimping guide protrusion 40 of the lower housing 24 shown in FIG. 5 is inserted. The crimp guide accommodating portion 62 is a through hole extending in a cylindrical shape in the connector height direction. Then, a slit 63 extending along the circumferential direction of the crimp portion 60 is formed between the crimp portion 60 and the swing support portion 61. The slit 63 facilitates deformation of the crimp portion 60 when crimping the crimp portion 60 to the optical cable 2.

On the other hand, the crimp support member 23 is made of metal, and the insertion portion 64 to be inserted into the outer cover 11 of the optical cable 2 and the end surface in the fitting direction of the outer cover 11 having a larger diameter than the insertion part 64 abut. The abutting portion 65 is provided. The insertion portion 64 and the abutting portion 65 are integrally formed in the fitting order in the fitting direction.

Here, returning to FIG. 4, at the front end portion 2A in the fitting direction of the optical cable 2, the outer cover 11 is formed with two drawing slits 2B extending in the inserting/removing direction. Each of the drawing slits 2B is formed so as to have a predetermined length from the tip end 11A in the fitting direction of the outer cover 11 in the removing direction. The two drawing slits 2B are formed at a central position of the outer cover 11 in the connector height direction, and are formed to face each other in the connector width direction.

11 to 13 show a state in which the optical connector 3 is attached to the tip portion 2A of the optical cable 2. However, in FIGS. 11 and 12, the two ferrules 20, the two compression coil springs 21, and the outer tension member 10 of the optical cable 2 are not shown. Further, in FIGS. 11 and 12, the boot 7 is illustrated by cutting out the upper half in the connector height direction. In FIG. 12, the crimping member 22 and the outer cover 11 of the optical cable 2 are further illustrated by cutting out the upper half in the connector height direction. FIG. 13 corresponds to the plan view of FIG.

To attach the optical connector 3 to the tip 2A of the optical cable 2, first, as shown in FIG. 4, the outer cover 11 of the tip 2A of the optical cable 2 is removed by a predetermined length, and the optical fiber cord 8 and the outer tension member 10 (see FIG. See also). Further, the outer skin 11 is formed with two drawing slits 2B.

Next, the front end portion 2A of the optical cable 2 is passed through the bellows portion 51 of the boot 7 and the cable hole 54 of the accommodated portion 50 (see also FIG. 6) in order.

Next, as shown in FIG. 13, the two optical fiber cords 8 are drawn out from the two drawing slits 2B of the outer cover 11 of the optical cable 2 and passed through the two compression coil springs 21 (see also FIG. 4). Then, it is attached to the two ferrules 20 by crimping. The optical fiber cord 8 is attached to each ferrule 20 by a known method.

Next, as shown by the chain double-dashed line in FIG. 13, the outer tension member 10 exposed from the outer cover 11 of the optical cable 2 toward the fitting direction is folded back 180 degrees in the removing direction, and the outer tension member 10 is placed outside the outer cover 11. To place.

In this state, the insertion portion 64 of the crimp support member 23 is inserted into the outer cover 11 of the optical cable 2, and the abutting portion 65 is abutted against the tip 11A of the outer cover 11 (see also FIG. 4). Then, the tip portion 2A of the optical cable 2 is inserted into the crimping portion 60 of the crimping member 22 together with the crimping supporting member 23, and the abutting portion 65 of the crimping supporting member 23 is abutted against the swinging support portion 61. In this state, the crimping portion 60 is crimped to the tip portion 2A of the optical cable 2 using a crimping tool. At this time, the outer tension member 10 and the outer cover 11 of the optical cable 2 are crushed between the insertion portion 64 of the crimp support member 23 and the crimp portion 60 of the crimp member 22 in the radial direction of the optical cable 2. As a result, the crimping member 22 and the crimping support member 23 are fixed to the tip portion 2A of the optical cable 2.

Next, the two ferrules 20 are inserted into the two ferrule through holes 30 (see also FIG. 5) of the lower housing 24, and the lower housing 24 is inserted into the crimping guide accommodating portion 62 of the swing support portion 61 of the crimping member 22. The crimping guide protrusions 40 are inserted, and at the same time, the two boot guide protrusions 41 of the lower housing 24 are inserted into the two boot guide accommodating portions 57 of the boot 7. Then, as shown in FIGS. 11 and 12, the boot 7 is seated on the bottom surface 32</b>A of the lower housing 24.

As shown in FIGS. 11 and 12, the optical cable 2 is supported by the lower housing 24 via the crimping guide protrusion 40. That is, the optical cable 2 is supported by the housing 6 so as to be swingable around the crimping guide protrusion 40. Therefore, since the bending start position of each optical fiber cord 8 is the rear end 20A of the ferrule 20 shown in FIG. 13, even when the wiring space of the harness 1 is narrow and the optical cable 2 must be bent tightly, It is easy to fit the bending radius within the allowable bending radius.

Further, at this time, since the center of swing of the boot 7 and the center of swing of the crimping member 22 are coincident with each other, the boot 7, the optical cable 2, and the crimping member 22 can be swung integrally, so that the optical The above-mentioned effect regarding the allowable bending radius of the fiber cord 8 can be more reliably exhibited.

Finally, the upper housing 25 shown in FIG. 4 is joined to the lower housing 24 by welding or adhesion. As a result, the optical connector 3 for the tip portion 2A of the optical cable 2 is completed.

The preferred embodiment of the present disclosure has been described above, but the above embodiment has the following features.

As shown in FIG. 4, the optical connector 3 includes a housing 6 having a fitting portion 5 at one end that can be fitted to the mating connector 4 (object to be fitted), and a boot 7 attached to the other end of the housing 6. , Is provided. As shown in FIG. 8, the housing 6 is provided with a boot guide protrusion 41 (boot protrusion) protruding in a columnar shape in a direction orthogonal to the fitting direction of the mating connector 4. A boot guide accommodating portion 57 (boot protrusion accommodating portion) is formed in the boot 7 as a through hole for accommodating the boot guide protruding portion 41. According to the above configuration, even if an external force acts on the boot 7, the boot 7 is unlikely to drop off from the housing 6.

In the above embodiment, the housing 6 is provided with the boot guide protrusion 41, and the boot 7 is provided with the boot guide accommodating portion 57. However, instead of this, the boot 7 is provided with a boot protrusion protruding in a column shape in a direction orthogonal to the fitting direction to the mating connector 4, and the boot protrusion accommodating portion for accommodating the boot protrusion is provided in the housing 6. You may form in. Even in this case, the effect of making it difficult for the boot 7 to fall off the housing 6 is exhibited without any problem.

Further, the boot guide protrusion 41 is configured to protrude in a columnar shape in a direction orthogonal to the fitting direction to the mating connector 4, but instead of this, intersects with the fitting direction to the mating connector 4. It may be projected in a columnar shape in the direction of movement. Even in this case, the effect of making it difficult for the boot 7 to fall off the housing 6 is exhibited without any problem.

Further, the boot guide accommodating portion 57 is a through hole in which the boot guide protrusion 41 is accommodated, but instead of this, it may be a recess that does not penetrate. Even in this case, the effect of making it difficult for the boot 7 to fall off the housing 6 is exhibited without any problem.

There is a gap between the outer peripheral surface 41A of the boot guide protrusion 41 shown in FIG. 5 and the inner peripheral surface 57A of the boot guide accommodating portion 57 shown in FIG. According to the above configuration, the boot 7 can be moved with respect to the housing 6 by the amount of the gap, so that the bending start position of the optical fiber cord 8 can be brought close to the fitting portion 5, and thus the installation space is small. The optical connector 3 can be used in space without any problem.

Further, as shown in FIGS. 7 and 8, when viewed in a plan view (when viewed along the protruding direction of the boot guide protrusion 41), the boot guide accommodating portion 57 extends in a slender shape along a predetermined direction. Has been formed. According to the above configuration, the boot 7 can be moved in the predetermined direction with respect to the housing 6.

Further, as shown in FIG. 7, the boot guide accommodating portion 57 has two division screens 57B that partition the boot guide accommodating portion 57 in the longitudinal direction of the boot guide accommodating portion 57. According to the above configuration, the range in which the boot 7 can move with respect to the housing 6 can be restricted.

Further, as shown in FIG. 7, when seen in a plan view, the boot guide accommodating portion 57 extends in an arc shape. According to the above configuration, the boot 7 can be rockable with respect to the housing 6 along the boot guide accommodating portion 57.

Further, as shown in FIGS. 7 and 8, the housing 6 is formed with a plurality of boot guide protrusions 41, that is, two. A plurality of boot guide accommodating portions 57, that is, two boot guide accommodating portions 57 are formed in the boot 7 so as to correspond to the two boot guide protrusions 41. When viewed in a plan view, the two boot guide accommodating portions 57 extend in an arc shape along a single arc 58. According to the above configuration, the boot 7 can be stably rocked with respect to the housing 6 along the boot guide accommodating portion 57.

Further, as shown in FIG. 7, the boot 7 has an accommodated portion 50 accommodated in the housing 6. The accommodated portion 50 has an annular outer peripheral surface 55 (opposing surface) that faces the curved inner wall surface 33A (inner wall surface) and the bottom surface 32A (inner wall surface) of the housing 6. An annular rib 56 (rib) that annularly contacts the curved inner wall surface 33A and the bottom surface 32A of the housing 6 is formed on the annular outer peripheral surface 55. According to the above configuration, it is possible to prevent water, oil or other foreign matter from passing between the curved inner wall surface 33A and the bottom surface 32A of the housing 6 and the outer peripheral surface 55 of the accommodated portion 50 of the boot 7.

Further, as shown in FIG. 7, two annular ribs 56 are formed on the annular outer peripheral surface 55 at positions separated from each other in the fitting direction. According to the above configuration, it is possible to more reliably prevent the passage of water, oil or other foreign matter between the curved inner wall surface 33A and the bottom surface 32A of the housing 6 and the outer peripheral surface 55 of the accommodated portion 50 of the boot 7. .. Specifically, by providing the two annular ribs 56, at least one of the two annular ribs 56 is provided in the housing regardless of the posture of the accommodated portion 50 in the internal space 26 of the housing 6. It can be expected to contact 6 in an annular shape. That is, the two annular ribs 56 can complementarily exhibit the sealing function.

In the above embodiment, two annular ribs 56 are provided on the annular outer peripheral surface 55, but instead of this, three or more annular ribs 56 may be provided.

Further, as shown in FIGS. 4 and 9, the optical connector 3 includes a housing 6 having a fitting portion 5 at one end that can be fitted to the mating connector 4, and a crimp portion 60 that is crimped to the outer cover 11 of the optical cable 2. And a crimping member 22 having the same. As shown in FIGS. 9 to 12, the housing 6 is formed with a crimping guide protrusion 40 (crimping protrusion) protruding in a columnar shape in a direction orthogonal to the fitting direction to the mating connector 4. The crimping member 22 is formed with a crimping guide accommodating portion 62 (crimping protrusion accommodating portion) as a through hole for accommodating the crimping guide protrusion 40. According to the above configuration, even if an external force acts on the optical cable 2, the crimping member 22 does not easily come off from the housing 6.

In the above embodiment, the crimping guide protrusion 40 is formed on the housing 6 and the crimping guide accommodating portion 62 is formed on the crimping member 22, but instead, the crimping guide protrusion is formed on the crimping member 22. However, the crimp guide accommodating portion may be formed in the housing 6. Even in this case, the effect that the crimping member 22 is less likely to fall off the housing 6 is exhibited without any problem.

Further, although the pressure-bonding guide protrusion 40 has a columnar shape protruding in a direction orthogonal to the fitting direction, it may have a columnar shape protruding in a direction intersecting the fitting direction. Even in this case, the effect that the crimping member 22 is less likely to fall off the housing 6 is exhibited without any problem.

Further, although the crimping guide accommodating portion 62 is a through-hole for accommodating the crimping guide protrusion 40, it may be a recess for accommodating the crimping guide protrusion 40 instead. Even in this case, the effect that the crimping member 22 is less likely to fall off the housing 6 is exhibited without any problem.

Further, as shown in FIG. 13, the crimping guide protrusion 40 and the crimping guide accommodating portion 62 are formed in a cylindrical shape. According to the above configuration, the optical cable 2 can be rockable with respect to the housing 6.

In the above-described embodiment, both the crimping guide protrusion 40 and the crimping guide accommodating portion 62 are cylindrical, but instead of this, only one of them may be cylindrical. Even in this case, the effect of allowing the optical cable 2 to swing with respect to the housing 6 is exhibited without any problem.

Further, as shown in FIGS. 4 and 13, the optical connector 3 further includes a crimp support member 23 that is disposed inside the crimp portion 60 of the crimp member 22 and that can be inserted into the outer cover 11 of the optical cable 2. According to the above configuration, the crimp portion 60 of the crimp member 22 can be crimped more reliably to the outer cover 11 of the optical cable 2.

Further, as shown in FIGS. 1 and 2, the harness 1 includes an optical connector 3 and an optical cable 2. As shown in FIG. 4, the optical connector 3 further includes a ferrule 20. As shown in FIG. 3, the optical cable 2 includes an optical fiber cord 8, an outer tension member 10 (tensile member) vertically attached to the optical fiber cord 8, an outer cover 11 covering the optical fiber cord 8 and the outer tension member 10. With. The outer cover 11 is formed with a drawing slit 2B (slit). As shown in FIG. 13, the optical fiber cord 8 is pulled out from the optical cable 2 through the pull-out slit 2B and reaches the ferrule 20 through the outside of the crimp portion 60 of the crimp member 22. According to the above configuration, in the internal space 26 of the optical connector 3, the optical fiber cord 8 avoids the crimping guide protrusion 40 and is wired to reach the ferrule 20.

1 Harness 2 Optical cable 2A Tip 2B Draw-out slit (slit)
3 Optical connector 4 Mating connector (mating target)
5 Fitting part 6 Housing 7 Boot 8 Optical fiber cord 9 Fiber 10 Outer tension member (tensile member)
11 Outer Skin 11A Tip 12 Core Wire 13 Fiber 14 Inner Tension Member 15 Sheath 20 Ferrule 20A Rear End 21 Compression Coil Spring 22 Crimping Member 23 Crimping Support Member 24 Lower Housing 25 Upper Housing 26 Internal Space 27 Spring Holding 30 Ferrule Through Hole 31 Spring Support Part 32 Bottom plate 32A Bottom surface (inner wall surface)
33 Side plate 33A Curved inner wall surface (inner wall surface)
40 Crimping guide protrusion (crimping protrusion)
40A outer peripheral surface 41 boot guide protrusion (boot protrusion)
41A Outer peripheral surface 43 Boot mounting recess 50 Receiving portion 51 Bellows portion 52 Receiving portion main body 52A Upper surface 52B Lower surface 52C Side surface 53 Guide arm 54 Cable hole 55 Outer peripheral surface (opposing surface)
56 Annular rib (rib)
57 Boot guide housing (boot projection housing)
57A Inner peripheral surface 57B Section screen 58 Arc 60 Crimping part 61 Swing support part 62 Crimping guide accommodating part (crimping protrusion accommodating part)
63 slit 64 insertion part 65 butting part

Claims (12)

A housing having a fitting portion at one end that can be fitted to a fitting target,
Boots attached to the other end of the housing,
Equipped with
One of the housing and the boot is formed with a boot protrusion protruding in a columnar shape in a direction intersecting with the fitting direction to the fitting target, and the other boot protrusion is formed. A boot protrusion accommodating portion that is a through hole or a recess to be accommodated is formed,
Optical connector. The optical connector according to claim 1, wherein
There is a gap between the outer peripheral surface of the boot protrusion and the inner peripheral surface of the boot protrusion accommodating portion,
Optical connector. The optical connector according to claim 2, wherein
When viewed along the protruding direction of the boot protrusion, the boot protrusion accommodating portion is formed to be elongated along a predetermined direction.
Optical connector. The optical connector according to claim 3,
The boot protrusion accommodating portion has two partition screens that partition the boot protrusion accommodating portion in the longitudinal direction of the boot protrusion accommodating portion.
Optical connector. The optical connector according to claim 3 or 4, wherein
When viewed along the protruding direction, the boot protrusion housing portion extends in an arc shape,
Optical connector. The optical connector according to claim 3 or 4, wherein
One of the housing and the boot is formed with a plurality of the boot protrusions, and the other is formed with a plurality of the boot protrusion accommodating portions corresponding to the plurality of boot protrusions. Cage,
When viewed along the protruding direction, the plurality of boot protrusion housing portions extend in an arc shape along a single arc,
Optical connector. The optical connector according to claim 5 or 6, wherein
The boot has an accommodated portion accommodated in the housing,
The accommodated portion has an annular facing surface that faces the inner wall surface of the housing,
A rib that annularly contacts the inner wall surface of the housing is formed on the annular facing surface.
Optical connector. The optical connector according to claim 7,
At least two ribs are formed on the annular facing surface at positions separated from each other in the fitting direction,
Optical connector. A housing having a fitting portion at one end that can be fitted to a fitting target,
A crimping member having a crimping portion that is crimped to the outer cover of the optical cable;
Equipped with
One of the housing and the crimping member is formed with a crimping protrusion that protrudes in a columnar shape in a direction intersecting with the fitting direction to the fitting target, and the other is the crimping protrusion. A crimping protrusion accommodating portion that is a through hole or a recess for accommodating is formed,
Optical connector. The optical connector according to claim 9,
At least one of the crimping protrusion or the crimping protrusion accommodating portion is formed in a cylindrical shape,
Optical connector. The optical connector according to claim 9 or 10, wherein
A crimping support member disposed inside the crimping portion of the crimping member and insertable into the outer cover of the optical cable;
Optical connector. The optical connector according to claim 11,
The optical cable,
Equipped with
The optical connector further comprises a ferrule,
The optical cable includes an optical fiber cord, a tensile strength member vertically attached to the optical fiber cord, and an outer cover that covers the optical fiber cord and the tensile strength member,
The outer skin has a slit formed,
The optical fiber cord is pulled out from the optical cable through the slit, and reaches the ferrule through the outside of the crimp portion of the crimp member.
Harness.

Images