JP5582894B2 - Waterproof optical connector plug and waterproof optical connector device - Google Patents

Description

  The present invention relates to a waterproof optical connector plug and a waterproof optical connector device comprising the waterproof optical connector plug and a receptacle.

  FIG. 16 shows a configuration described in Patent Document 1 as a conventional example of a waterproof optical connector device. The waterproof optical connector device includes a waterproof optical connector plug 10 and a receptacle 30 that are connected to each other. FIG. 17 shows a cross-sectional view of the waterproof optical connector plug 10 and the receptacle 30 connected to each other.

  The receptacle 30 is used by being fixed to a wall surface, and an O-ring 32 is disposed on the surface of the shell 31 attached to the wall surface.

  The waterproof optical connector plug 10 includes a main body portion 14, a retaining member 13, a connector member 12, a rubber hood 11, a gasket 15, a cord clamp 16, a fastening member 17, and a coupling member 18.

  The waterproof optical connector plug 10 and the receptacle 30 are fixed by bayonet connection, and in order to enable this, a groove 31c having a recess 31b formed at the end is formed on the outer surface of the cylindrical portion 31a of the shell 31 of the receptacle 30. Are provided at positions facing each other. On the other hand, two protrusions 18a are provided on the inner periphery of the distal end side of the coupling member 18 of the waterproof optical connector plug 10 at positions facing each other.

  The connector member 12 is detachably fitted to an adapter member 33 provided in the receptacle 30. The connector member 12 holds a ferrule 19, and an optical fiber 20 is fixed to the ferrule 19. In FIG. 17, 21 indicates a tension member, and 22 indicates a cable.

  The adapter member 33 is provided with a fitting space 34, and a connection sleeve 35 into which the ferrule 19 is inserted is provided in the fitting space 34. The adapter member 33 is provided with an elastic displacement portion 36, and the connector member 12 is engaged with the adapter member 33 by the engagement protrusion 36 a at the tip of the elastic displacement portion 36 being engaged with the protruding portion 12 a of the connector member 12. It is to be stopped.

  A gasket 15, a cord clamp 16, and a fastening bracket 17 are attached to the rear end of the main body 14 with the cable 22 inserted therethrough. The elastic portion 16 a at the end of the cord clamp 16 is crushed by the fastening bracket 17.

  The rear end of the connector member 12 is loosely fitted inside an intermediate middle diameter portion 14a of the main body portion 14, and is supported by the main body portion 14 so as to be slidable within a predetermined range. A retaining member 13 is accommodated in the middle diameter portion 14 a, and a tension member 21 is fixed to the retaining member 13.

  The front part of the main body part 14 is a large-diameter part 14b, and the rear plate 18b of the coupling member 18 is located near the boundary between the large-diameter part 14b and the intermediate-diameter part 14a. The washer 23 prevents the medium diameter portion 14a from falling off.

  A connecting member (spring washer) 24 is attached to the inner periphery on the front end side of the medium diameter portion 14 a, and an annular recess 12 b is formed on the outer wall of the connector member 12 corresponding to the connecting member 24. The connector member 12 is slidable with respect to the main body 14 within a predetermined range by using the length (width) of the annular recess 12b.

  The large-diameter portion 14 b has a cylindrical portion 14 c that protrudes toward the cylindrical portion 31 a of the receptacle 30. The cylindrical portion 14c contacts the inner periphery of the cylindrical portion 31a when the waterproof optical connector plug 10 and the receptacle 30 are connected and fixed, and forms an overlapping portion 25 between the cylindrical portion 31a. The cylindrical coupling member 18 is located outside the large diameter portion 14b and is connected to the cylindrical portion 31a by bayonet connection as described above. That is, when the waterproof optical connector plug 10 and the receptacle 30 are connected and fixed, the cylindrical portion 31a of the receptacle 30 is sandwiched between the coupling portion 18 and the cylindrical portion 14c of the main body portion 14 of the waterproof optical connector plug 10. It becomes a state.

  Similar to the cylindrical portion 14c, the coupling member 18 forms an overlapping portion 27 between the cylindrical portion 31a, and the overlapping portions 25 and 27 can ensure waterproofing. Furthermore, the waterproof effect is enhanced by the rubber hood 11 located in the gap 26.

JP 2009-294343 A

  As described above, in the conventional waterproof optical connector plug, the cylindrical portion 14c of the main body portion 14 is positioned around the connector member 12 on the front end side connected to the other receptacle, and the cylindrical portion around the cylindrical portion 14c is further formed. Therefore, the outer diameter of the front end connected to the receptacle is considerably large.

  In addition, the receptacle connected to such a waterproof optical connector plug has a large diameter cylindrical portion of the shell, similarly to the waterproof optical connector plug. In this respect, the receptacle mounting space and the connection work space are also reduced. It was a lot needed.

  In view of such circumstances, an object of the present invention is to provide a waterproof optical connector plug that can be made smaller than before, and further, a waterproof light comprising such a waterproof optical connector plug and a receptacle. To provide a connector device.

According to the invention 請 Motomeko 1, waterproof optical connector plug includes a housing, an optical connector that holds a ferrule attached to the terminal of the optical fiber within its housing, the optical connector is housed and held, the optical connector The insertion connecting part that surrounds the side where the ferrule is located and the main body part that follows the rear end of the insertion connecting part are integrally formed, the insertion connecting part is inserted and connected to the mating receptacle, and the main body part is formed protruding from the receptacle. A connector member that is inserted and fitted into the cylindrical portion, and is disposed around the connector member in a cylindrical shape, and a rear end portion is rotatably attached to the main body portion and is engaged with an outer peripheral surface of the cylindrical portion. An engaging member that is cylindrical and has a front end that surrounds the rear end portion of the main body and is connected and fixed to the main body. Optical fiber from hole A coupling nut from which a protective tube surrounding the cable or the optical fiber is led out, a first waterproofing member disposed around the cable or the protective tube, and second and second components respectively disposed at the front end and the rear end of the main body portion And the inner diameter of each of the coupling nut, the first waterproof member, and the outer shell member is sized to allow the optical connector to pass therethrough. The first waterproof member is screwed into the coupling nut. The second waterproof member is compressed by the cylinder when the body portion is inserted and fitted into the cylindrical portion, and the space between the inner peripheral surface of the outer shell member and the outer peripheral surface of the cable or the protective tube is sealed. The third waterproof member is sandwiched between the inner peripheral surface of the outer shell member and the main body to seal the space between them. To do.

In the invention of claim 2, in the invention of claim 1 , the connector member is made of metal.

According to a third aspect of the invention, in the first aspect of the invention, the first waterproof member is a cylindrical rubber.

In the invention of claim 4, in the invention of claim 1 , the second and third waterproof members are O-rings.

According to a fifth aspect of the present invention, in the first aspect of the present invention, a spring for biasing the engaging member in the rotational direction is disposed between the main body portion and the engaging member, and the engaging member is connected to the cylindrical portion by a bayonet connection. The engagement is fixed.

In the invention of claim 6, in the invention of claim 1 , the optical connector is an SC2 connector standardized by JIS C 5973.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, the insertion connecting portion of the connector member accommodating the optical connector has the same shape as the insertion connecting side portion of the SC connector standardized by JIS C 5973.

According to an eighth aspect of the present invention, a waterproof optical connector device includes the waterproof optical connector plug according to any one of claims 1 to 7 and a receptacle connected to the waterproof optical connector plug, and the receptacle is a waterproof optical connector. The receptacle is a relay receptacle to which the plug is connected from both sides. The receptacle includes a pair of shells including the cylindrical portion and a flange portion provided at one end of the cylindrical portion, a sleeve into which a ferrule is inserted, and a locking member that locks the optical connector. The shells are fixed and integrated with the flange portions sandwiching the waterproof member, and the sleeve and the locking member are accommodated and held in a pair of the fixed and integrated shells.

According to a ninth aspect of the present invention, a waterproof optical connector device comprises the waterproof optical connector plug according to any one of the first to seventh aspects and a receptacle connected to the waterproof optical connector plug, wherein the receptacle is the cylindrical portion. And a shell formed of a flange portion provided at one end of the cylindrical portion, and a shell attached to the shell so as to protrude on the opposite side of the cylindrical portion with respect to the flange portion and optically connected to the waterproof optical connector plug A housing into which the optical connector is inserted, a sleeve into which the ferrule of the ferrule and the other optical connector is inserted, and a locking member for locking the optical connector and the other optical connector. In addition, the sleeve and the locking member are accommodated and held, and a waterproof member is arranged on the mounting surface on the housing side of the flange portion.

  According to the present invention, the cylindrical portion of the main body portion and the cylindrical coupling member are not doubled around the connector member that houses and holds the optical connector of the waterproof optical connector plug, and the mating receptacle of the counterpart receptacle is not located. Only the engaging member that engages with the outer peripheral surface of the cylindrical portion protruding from the shell is arranged, and therefore the outer diameter on the front end side connected to the receptacle is made smaller than in the conventional case. In that respect, downsizing can be achieved.

  In addition, by making the waterproof optical connector plug small in this way, the counterpart receptacle can also be configured to have a small diameter and small size. For example, in the case of a receptacle attached to a wall surface such as a panel, the installation space and the space required for connection work Can be reduced.

The perspective view which shows the external appearance of one Example of the waterproof optical connector apparatus by this invention. The disassembled perspective view of the waterproof optical connector plug in FIG. The enlarged view of the optical connector in FIG. 2A is an enlarged view of the connector member in FIG. 2, FIG. The figure for demonstrating the assembly of an optical connector and a connector member. 1A is a front view of the receptacle in FIG. 1, and B is a cross-sectional view taken along line CC in FIG. The figure for demonstrating the connection of the waterproof optical connector plug to a receptacle. The figure for demonstrating the detachment | leave from the receptacle of a waterproof optical connector plug. A is a side view showing a state in which a waterproof optical connector plug is connected to a receptacle, and B is a cross-sectional view taken along line CC in A. FIG. The figure for demonstrating the connection of the waterproof optical connector plug to a receptacle. The disassembled perspective view which shows the other Example of a waterproof optical connector plug. Sectional drawing which shows the state in which the waterproof optical connector plug shown in FIG. 11 was connected to the receptacle. The figure which shows the other Example of a receptacle, A is a top view, B is a front view, C is a side view, D is a rear view, E and F are perspective views. The perspective view which shows the other Example of the waterproof optical connector apparatus by this invention. The perspective view which shows the other Example of the waterproof optical connector apparatus by this invention. The perspective view which shows the prior art example of a waterproof optical connector apparatus. FIG. 17 is a cross-sectional view showing a state where the waterproof optical connector plug and the receptacle in FIG. 16 are connected.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the appearance of one embodiment of a waterproof optical connector device according to the present invention. The waterproof optical connector device comprises a waterproof optical connector plug 60 and a receptacle 70.

  FIG. 2 shows the waterproof optical connector plug 60 in an exploded manner. The waterproof optical connector plug 60 includes an optical connector 40, a connector member 50, an engaging member 61, a coil spring 62, an outer shell member 63, a first waterproof member 64, a sliding ring 65, a coupling nut 66, and second and third waterproof members. And members 67 and 68. In FIG. 2, reference numeral 80 denotes an optical fiber cable, and reference numeral 81 denotes an optical fiber cord that is taken out from the optical fiber cable 80 with the protective member removed.

First, the structure of each part of the waterproof optical connector plug 60 will be described.
FIG. 3 is an enlarged view of the optical connector 40. The optical connector 40 is an SC2 connector standardized by JIS C 5973, that is, in this example, a general-purpose SC2 connector is used as the optical connector 40. It is said.

  The optical connector 40 includes a substantially rectangular parallelepiped housing 41, and a ferrule 42 attached to the end of an optical fiber 82 taken out from the optical fiber cord 81 is held in the housing 41. The ferrule 42 is located in the opening 41 a on the front end side of the housing 41. On both side surfaces of the housing 41, a first locking portion 41b and a second locking portion 41c are formed to project. The detailed structure of the optical connector 40 is standardized in JIS C 5973, and thus detailed description thereof is omitted.

  FIG. 4 shows the details of the connector member 50. The connector member 50 has an insertion connection portion 51 having a substantially rectangular parallelepiped shape on the front end side, and the outer shape follows the rear end of the insertion connection portion 51. A substantially cylindrical main body 52 is integrally formed. A square hole 50a is formed through the connector member 50 from the main body portion 52 to the insertion connection portion 51, and both side surfaces of the insertion connection portion 51 are opened by openings 51a.

  A key 53 protrudes from the upper surface of the insertion connecting portion 51, and an unlocking portion 54 that functions when releasing the locking with the receptacle 70 on the front end side of the upper and lower positions sandwiching the openings 51a on both sides. Is formed as shown in FIG. The shape of the insertion connecting portion 51 is the same as that of the outer portion (outer housing portion) of the SC connector standardized in JIS C 5973 configured to accommodate the SC2 connector described above.

  Annular grooves 52a and 52b are respectively formed on the outer peripheral surfaces of the front end and the rear end of the main body 52, and a second waterproof member 67 and a third waterproof member 68 are disposed in the annular grooves 52a and 52b, respectively. Yes. Both the second waterproof member 67 and the third waterproof member 68 are O-rings.

  Two pairs of projecting portions 55a, 55b and 56a, 56b projecting in an arc shape are formed at positions facing each other at an intermediate position sandwiched between the annular grooves 52a, 52b on the outer peripheral surface of the main body 52. These protrusions 55a, 55b and 56a, 56b are used for rotatably attaching the engaging member 61 to the main body 52, and a coil spring 62 is further locked to the rear end side of the protrusions 56a, 56b. A projecting portion 57 is formed to project.

  On the other hand, a pair of locking projections 58 are formed so as to protrude from each other at a boundary portion between the square hole 50a formed in the main body 52 and the insertion connecting portion 51. The locking projection 58 has an inclined surface 58 a on the rear end surface of the main body 52.

  The engaging member 61 has a cylindrical shape, and protrusions 61a project from the inner peripheral surface of the front end at positions facing each other. Further, although hidden in FIG. 2 and the details are not visible on the inner peripheral surface on the rear end side, a pair of arc-shaped projecting portions are formed at positions facing each other, and one end of the coil spring 62 is inserted and fixed. A fixing portion having a hole is formed to protrude from the inner peripheral surface of the rear end.

One end of the coil spring 62 is bent in the axial direction, and the other end is hidden so as not to be seen in FIG. 2, but is bent back to form a hook shape.
The outer shell member 63 has a cylindrical shape, and a screw is formed on the outer peripheral surface of the rear end portion thereof although not shown in FIG.
The first waterproof member 64 has a cylindrical shape and is made of rubber.

  The coupling nut 66 has a cylindrical shape, and a screw that engages with a screw of the outer shell member 63 is formed on the inner peripheral surface on the front end side. The inner diameter on the rear end side is smaller than that on the front end side, and the rear end side portion is divided into two semicircular arc portions. One semicircular arc portion 66a is separated from the other semicircular arc portion 66b integral with the front end side, and a central through hole through which the optical fiber cable 80 is led out is formed by these two semicircular arc portions 66a and 66b. Yes. The semicircular arc portion 66a is fastened and fixed to the semicircular arc portion 66b by a pair of screws 66c.

Hereinafter, the assembly of each part of the waterproof optical connector plug 60 will be described.
The optical connector 40 holding the ferrule 42 attached to the end of the optical fiber 82 is attached to the connector member 50. At this time, the coupling nut 66, the sliding ring 65, the first waterproof member 64, and the outer shell member 63 are passed through the optical fiber cable 80 in advance.

  FIG. 5 shows how the optical connector 40 and the connector member 50 are assembled. The optical connector 40 is inserted into the square hole 50a of the connector member 50 from the main body 52 side. At this time, the optical connector 40 is press-fitted so that the first locking portion 41b provided in the optical connector 40 gets over the locking protrusion 58 formed in the square hole 50a, and the first locking portion 41b is inserted into the first locking portion 41b as shown in FIG. 5C. The one locking portion 41 b is prevented from coming off by the locking projection 58, and the optical connector 40 is attached to the connector member 50.

  Both the first and second locking portions 41b and 41c of the optical connector 40 are located in the opening 51a of the insertion connecting portion 51 of the connector member 50, and the second locking portion 41c and the insertion connecting portion 51 positioned in front thereof. A predetermined gap S is formed between the front edge portion 51b and the front edge portion 51b. The optical connector 40 is slidable (slidable) with respect to the connector member 50 by the gap S. Thus, the insertion connection portion 51 of the connector member 50 that accommodates the optical connector 40 has the same shape as the insertion connection side portion of the SC connector described above.

  An outer shell member 63 is attached to the main body 52 of the connector member 50. The outer shell member 63 is connected and attached so that the front end portion thereof surrounds the rear end portion of the main body portion 52. The outer shell member 63 is attached and fixed to the main body 52 by two screws 69. A screw hole 52c is formed in the main body 52 as shown in FIG. 4A.

  The coupling nut 66 is screwed into a screw formed at the rear end portion of the outer shell member 63. At this time, the first waterproofing member 64 disposed around the optical fiber cable 80 is sandwiched between the outer shell member 63 and the coupling nut 66. The sliding ring 65 is interposed between the coupling nut 66 and the first waterproofing member 64, thereby preventing the rotational force from acting on the first waterproofing member 64 made of rubber, and in the axial direction. It should be compressed well.

  After the coupling nut 66 is tightened, the screw 66c is tightened, and the portion derived from the coupling nut 66 of the optical fiber cable 80 is tightened and fixed by the semicircular arc portions 66a and 66b.

  The engaging member 61 is attached to the connector member 50 from the insertion connecting portion 51 side. At this time, the coil spring 62 is passed through the connector member 50 in advance and the engaging member 61 is attached.

  The engaging member 61 protrudes on the outer peripheral surface of the main body 52 of the connector member 50 in the gap between a pair of arc-shaped protrusions that protrude from the inner peripheral surface on the rear end side. Are pushed in so that they match each other, and then, the connector member 50 is rotated so that the protruding portion of the engaging member 61 is sandwiched between the protruding portions 55a and 55b of the connector member 50 and the protruding portions 56a and 56b. It is attached around.

One end of the coil spring 62 is inserted and fixed in the hole of the engaging member 61, and the other end is abutted and locked to the protrusion 57 of the main body 52 of the connector member 50, and the main body 52 and the engaging member 61 are locked. Between. As a result, the engaging member 61 is pivotably attached to the main body 52 and is biased in the rotational direction by the coil spring 62.
The assembly is thus completed, and the waterproof optical connector plug 60 is completed.

Next, the configuration of the receptacle 70 will be described with reference to FIGS.
In this example, the receptacle 70 is a relay receptacle to which the waterproof optical connector plug 60 is connected from both sides, and includes a pair of shells 71, a sleeve 75, a locking member 76, and a waterproof member 77.

  The shell 71 includes a cylindrical portion 72 and a flange portion 73 provided at one end of the cylindrical portion 72. In order to enable bayonet connection with the engaging member 61 of the waterproof optical connector plug 60, a pair of grooves 72b each having a recess 72a formed at the end are formed on the outer peripheral surface of the cylindrical portion 72 at positions facing each other.

  The pair of shells 71 are fixed and integrated by the flange portions 73 being abutted against each other. The flanges 73 are fixed together using screws 78. At this time, the waterproof member 77 is sandwiched between the flange portions 73. The waterproof member 77 is an O-ring, and a circular groove 73 a for positioning the O-ring is formed in the flange portion 73.

  The sleeve 75 and the locking member 76 are housed and held in a pair of fixed shells 71. The locking member 76 includes a holding portion 76a for holding a cylindrical sleeve 75 and a locking piece 76b, and a second engagement of the optical connector 40 of the waterproof optical connector plug 60 is provided at the tip of the locking piece 76b. A locking projection 76c that engages with the locking portion 41c to lock the optical connector 40 is formed. The shell 71 is formed with a key groove 74 that engages with the key 53 formed on the connector member 50 of the waterproof optical connector plug 60.

  FIG. 7 shows a state in which the waterproof optical connector plug 60 is inserted and connected to the receptacle 70 configured as described above. The waterproof optical connector plug 60 is simply a receptacle as indicated by an arrow a in the figure. The waterproof optical connector plug 60 is connected to the receptacle 70 by being pushed into the receptacle 70. At this time, the engaging member 61 of the waterproof optical connector plug 60 is bayonet connected to the cylindrical portion 72 of the shell 71 of the receptacle 70, that is, the protrusion 61 a formed on the engaging member 61 is formed on the side wall of the groove 72 b of the cylindrical portion 72. By being guided, the engaging member 61 advances while rotating against the urging force of the coil spring 62, and then the protrusion 61a fits into the recess 72a, whereby the engaging member 61 is locked to the cylindrical portion 72. Connected.

  On the other hand, FIG. 8 shows a state in which the waterproof optical connector plug 60 is removed from the receptacle 70. The engaging member 61 of the waterproof optical connector plug 60 is rotated in the direction of the arrow b, and the protrusion 61a is the cylindrical portion of the shell 71. The waterproof optical connector plug 60 can be removed from the receptacle 70 by being pulled out in the direction of the arrow c after being removed from the recess 72 a of 72.

  FIG. 9 shows a state in which the waterproof optical connector plug 60 and the receptacle 70 are connected, and FIG. 10 shows a state in which the waterproof optical connector plug 60 is connected to the receptacle 70 in a sectional view.

  When the connector member 50 containing and holding the optical connector 40 is inserted into the cylindrical portion 72 of the receptacle 70 as shown in FIG. 10B, the engaging piece 76b is engaged by the front edge portion 51b of the insertion connecting portion 51 of the connector member 50. After the stop projection 76c is lifted, it returns as shown in FIG. 10C, whereby the second locking portion 41c of the optical connector 40 is locked by the locking piece 76b, and the optical connector 40 is received by the receptacle 70. Inserted and connected. The ferrule 42 of the optical connector 40 is inserted into the sleeve 75, and the front end side of the main body portion 52 of the connector member 50 is inserted and fitted into the cylindrical portion 72 of the shell 71. Further, the engaging member 61 is positioned by engaging with the outer peripheral surface of the cylindrical portion 72.

  Note that when the waterproof optical connector plug 60 is removed from the receptacle 70, the engaging member 61 is rotated and then pulled out as described above. At this time, for example, the outer shell member 63 and the engaging member 61 are held. As the connector is pulled out, the connector member 50 is first displaced in the pulling direction by the gap S shown in FIG. 5C, and then the optical connector 40 is pulled out integrally with the connector member 50 (at the same time). Thus, when the connector member 50 first moves by the gap S, the locking protrusion 76c of the locking member 76 of the receptacle 70 is lifted by the locking release portion 54 of the connector member 50, and the locking is released. It has become a thing.

  Next, the waterproof structure of the waterproof optical connector device including the waterproof optical connector plug 60 and the receptacle 70 will be described in detail with reference to FIG. 9B.

  A first waterproof member 64 made of rubber is disposed at a portion where the optical fiber cable 80 is led out of the waterproof optical connector plug 60. The first waterproof member 64 is screwed into the outer shell member 63 of the coupling nut 66. The space between the inner peripheral surface of the outer shell member 63 and the outer peripheral surface of the optical fiber cable 80 is sealed. Thereby, the waterproof property of the rear-end part of the waterproof optical connector plug 60 is ensured.

  The third waterproofing member 68 made of an O-ring disposed at the rear end of the main body 52 of the connector member 50 is configured to connect the outer shell 63 to the main body 52 using the screw 69 and fix the outer shell 63. Is sandwiched between the inner peripheral surface and the main body portion 52 to seal the space between them. Thereby, the waterproofness of the attachment part of the outer shell member 63 to the main-body part 52 is ensured.

  The second waterproofing member 67 made of an O-ring disposed at the front end of the main body portion 52 of the connector member 50 has an inner peripheral surface of the cylindrical portion 72 when the main body portion 52 is inserted and fitted into the cylindrical portion 72 of the receptacle 70. And the main body portion 52 to seal the space between them. Thereby, the waterproof property of the insertion fitting part to the receptacle 70 of the main-body part 52 is ensured.

  As described above, in this example, waterproofness is ensured, and the waterproof optical connector plug 60 is connected to both sides of the receptacle 70 so that one waterproof optical connector plug 60 is attached. The waterproof property between the fiber cable 80 and the optical fiber cable 80 to which the other waterproof optical connector plug 60 is attached can be satisfactorily secured.

  On the other hand, while ensuring such waterproofness, in this example, the outer diameter of the front end side connected to the receptacle 70 of the waterproof optical connector plug 60 can be made smaller than before. It is assumed that the connector member 50 includes a main body 52 integrally formed with the insertion connecting portion 51 on the rear end side of the insertion connecting portion 51, and the main body 52 is engaged with the cylindrical portion 72 of the receptacle 70 in a bayonet connection. This is because the member 61 is attached, and only the engaging member 61 is arranged around the connector member 50, that is, the main body portion 14 like the conventional waterproof optical connector plug 10 shown in FIGS. Since the cylindrical portion 14c and the coupling member 18 are not doubled, the outer diameter on the front end side can be reduced. Accordingly, the diameter of the receptacle 70 can be reduced.

  In this example, as described above, the connector member 50 that accommodates and holds the optical connector 40 is formed by integrally forming the insertion connection portion 51 and the main body portion 52, and thereby the tip of the waterproof optical connector plug 60. In other words, the strength when a load is applied to the connector member 50 protruding from the engaging member 61 can be improved as compared with the conventional case. For example, if the connector member 50 is made of metal, the strength can be further improved.

  In the example described above, the waterproof optical connector plug 60 is attached to the tip of the thick optical fiber cable 80, that is, the thick optical fiber cable 80 is led out from the coupling nut 66 of the waterproof optical connector plug 60. For example, even when the waterproof optical connector plug 60 is attached to the tip of the thin optical fiber cord 81, the waterproofness of the lead-out portion can be ensured. 11 and 12 show a configuration example in this case.

  In this example, the optical connector 40 is an SC2 connector with a boot 43, and is attached to the tip of the optical fiber cord 81. The optical fiber cord 81 is passed through a thick protective tube 85, and this protective tube 85 is led out from the coupling nut 66. The waterproofness of the portion from which the protective tube 85 is led out can be ensured in the same manner as in the above-described example by sandwiching the first waterproof member 64 and fastening the coupling nut 66 to the outer shell member 63.

  Thus, even when the optical fiber cord 81 is passed through the protective tube 85 and protected by the protective tube 85, waterproofness can be ensured. Further, if the optical fiber cord 81 is passed through the protective tube 85 in this way, waterproofness can be ensured without being influenced by the outer diameter of the optical fiber cord 81.

  FIG. 13 shows another structure of the receptacle. The receptacle 90 shown in FIG. 13 is used by being attached to a wall such as a panel, for example, and portions corresponding to the respective portions of the receptacle 70 are denoted by the same reference numerals.

  The receptacle 90 includes a shell 71 including a cylindrical portion 72 and a flange portion 73 provided at one end of the cylindrical portion 72. The shell 71 protrudes on the opposite side of the cylindrical portion 72 with respect to the flange portion 73. A cylindrical housing 91 is attached. The housing 91 is fixed to the flange portion 73 by two screws 92. The sleeve 75 and the locking member 76 are accommodated and held across the shell 71 and the housing 91.

  FIGS. 14 and 15 show a receptacle 90 and a waterproof optical connector plug 60 and an optical connector 45 connected to the receptacle 90, respectively. In this example, the optical connector 45 is an SC connector.

  The receptacle 90 has a surface on the housing 91 side of the flange portion 73 as an attachment surface, and is attached to the panel 100 with four screws 101. A waterproof member 77 made of an O-ring disposed in the groove 73 a of the flange portion 73 is sandwiched between the flange portion 73 and the panel 100.

  A waterproof optical connector plug 60 is inserted and connected to the cylindrical portion 72 of the shell 71. On the other hand, the optical connector 45 is inserted and connected to the housing 91. The ferrule 42 of the waterproof optical connector plug 60 and the ferrule 42 of the optical connector 45 are respectively inserted into the sleeve 75 from both ends thereof, and the optical connector 40 and the optical connector 45 of the waterproof optical connector plug 60 are respectively locked by a locking member 76. Is done. As a result, the waterproof optical connector plug 60 and the optical connector 45 are optically connected via the receptacle 90.

  Even in this configuration, the waterproof optical connector device including the waterproof optical connector plug 60 and the receptacle 90 ensures good waterproofness outside the panel 100.

  In the embodiment described above, a general-purpose SC connector (SC2 connector) is used as an optical connector. However, the optical connector is not limited to this, and for example, a general-purpose MU connector may be used.

40 optical connector 41 housing 41b first locking portion 41c second locking portion 42 ferrule 50 connector member 51 insertion connecting portion 52 main body portion 61 engaging member 62 coil spring 63 outer shell member 64 first waterproofing member 65 sliding ring 66 Coupling nut 67 Second waterproof member 68 Third waterproof member 70 Receptacle 71 Shell 72 Cylindrical portion 73 Flange portion 75 Sleeve 76 Locking member 77 Waterproof member 80 Optical fiber cable 81 Optical fiber cord 82 Optical fiber 85 Protective tube 90 Receptacle

Claims (9)

An optical connector comprising a housing and holding a ferrule attached to the end of the optical fiber in the housing;
An insertion connection portion that accommodates and holds the optical connector and surrounds the side of the optical connector on which the ferrule is located, and a body portion that follows the rear end of the insertion connection portion are integrally formed, and the insertion connection portion is a counterpart. A connector member that is inserted and connected to a receptacle, and the main body portion is inserted and fitted into a cylindrical portion that is formed to protrude from the receptacle;
An engagement member that is cylindrical and disposed around the connector member, a rear end portion of which is rotatably attached to the main body portion, and is engaged with an outer peripheral surface of the cylindrical portion;
An outer shell member that has a cylindrical shape and whose front end portion is connected and fixed to the main body portion so as to surround the rear end portion of the main body portion;
A coupling nut threadedly engaged with the rear end of the outer shell member, and a protective tube surrounding the optical fiber cable or the optical fiber from the central through hole;
A first waterproofing member disposed around the cable or protective tube;
The second and third waterproof members are arranged at the front end and the rear end of the main body, respectively.
The inner diameters of the coupling nut, the first waterproof member and the outer shell member are sized to allow the optical connector to pass through,
The first waterproof member is compressed by screwing the coupling nut, and seals a space between the inner peripheral surface of the outer shell member and the outer peripheral surface of the cable or the protective tube,
When the main body is inserted and fitted into the cylindrical portion, the second waterproof member is sandwiched between the inner peripheral surface of the cylindrical portion and the main body, and seals the space between them.
The waterproof optical connector plug, wherein the third waterproof member is sandwiched between an inner peripheral surface of the outer shell member and the main body portion and seals a space therebetween. In the waterproof optical connector plug of claim 1 Symbol placement,
The waterproof optical connector plug, wherein the connector member is made of metal. The waterproof optical connector plug according to claim 1 ,
The waterproof optical connector plug, wherein the first waterproof member is a cylindrical rubber. In the waterproof optical connector plug of claim 1 Symbol placement,
The waterproof optical connector plug, wherein the second and third waterproof members are O-rings. In the waterproof optical connector plug of claim 1 Symbol placement,
Between the main body portion and the engagement member, a spring for biasing the engagement member in the rotation direction is disposed,
The waterproof optical connector plug, wherein the engaging member is engaged and fixed to the cylindrical portion by bayonet connection. In the waterproof optical connector plug of claim 1 Symbol placement,
The waterproof optical connector plug characterized in that the optical connector is an SC2 connector standardized by JIS C 5973. The waterproof optical connector plug according to claim 6 ,
The waterproof optical connector plug characterized in that the insertion connecting portion of the connector member accommodating the optical connector has the same shape as the insertion connecting side portion of the SC connector standardized by JIS C 5973. And one of the waterproof optical connector plug of claim 1 to 7, wherein a more becomes waterproof optical connector device and receptacle to be connected to the waterproof optical connector plug,
The receptacle is a receptacle for relay to which the waterproof optical connector plug is connected from both sides,
The receptacle is
A pair of shells comprising the cylindrical portion and a flange portion provided at one end of the cylindrical portion;
A sleeve into which the ferrule is inserted;
A locking member for locking the optical connector;
The pair of shells are fixed and integrated with the flange portions sandwiching a waterproof member, and the sleeve and the locking member are accommodated and held in the fixed and integrated shell. Optical connector device. And one of the waterproof optical connector plug of claim 1 to 7, wherein a more becomes waterproof optical connector device and receptacle to be connected to the waterproof optical connector plug,
The receptacle is
A shell comprising the cylindrical portion and a flange portion provided at one end of the cylindrical portion;
A housing that is attached to the shell so as to protrude on the opposite side of the cylindrical portion with respect to the flange portion, and into which another optical connector that is optically connected to the waterproof optical connector plug is inserted,
A sleeve into which the ferrule of the ferrule and the other optical connector are inserted;
A locking member for locking the optical connector and the other optical connector;
The sleeve and the locking member are accommodated and held across the shell and the housing,
A waterproof optical connector device, wherein a waterproof member is disposed on a mounting surface of the flange portion on the housing side.

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