JP2563940Y2 - Round optical connector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a round optical connector, and more particularly to a round optical connector having a small number of parts and easy to assemble a connector for connecting an optical cable.

[0002]

2. Description of the Related Art A multi-core round optical connector, which has been widely used, has a structure as shown in FIG. In the figure, reference numeral (1) denotes an optical ferrule, which has a cylindrical shape having a support flange (1a) at an intermediate portion as shown in a perspective view of FIG. (2) is a pressing spring, and (3) is a spring retainer, which is an optical fiber core wire which is opened at equal intervals on the same circumference as shown in the perspective view of FIG. 5 (b). It has a disk shape with a number of optical fiber core insertion grooves (3a) of a number of spring pressing bodies. (4) is a first fixed cylinder, and (5) is a tension member clamp, which is provided at equal intervals on the same circumference as shown in the perspective view of FIG. Optical fiber core insertion groove (5)
a) a disk-shaped portion provided with a) and a columnar portion having a fixing hole (5b) at its center, for example, a fixing hole into which the tension member is inserted and fixed by bonding (in the fixing method). (6) is a second fixed cylinder, (7) is a boot (for example, made of rubber), and has an optical cable insertion hole at the center.
(8) is an insert side body, which has optical fiber ferrule supporting holes (8b) having the number of optical fiber cores at equal intervals on the same circumference of the fixed wall (8a) as shown in the front view of FIG. Have. Reference numeral (9) denotes a coupling, one end of which is reduced in diameter so as to be hooked on a coupling locking support projection (8c) provided over the entire outer periphery of an insert, for example, the insert side body (8), and rotated. Attached to (10)
Is a rear cylindrical body, and the above components are assembled in the following manner.

[0003]

[Assembly] Connect the optical cable (11) to the rear cylindrical body (1
0), through the boot (7) and the second fixed cylinder (6), stripping the cover of the optical cable (11), and the tension member (11a) at the center and a plurality of lights arranged on the outer periphery thereof. The fiber core (11b) is exposed. Next, after fixing the tension member (11a) to the fixing portion (5b) of the tension member clamp (5), the optical fiber core ( 11b ) is inserted into the optical fiber core insertion groove (5a). Next, the pressing spring (2) is connected to the rear (the cable (1)
After fixing the tip of each optical fiber core (11b) to the center hole of each optical ferrule (1) inserted into (1) side), each optical fiber core (11b) and the optical ferrule (1).
Passed through a first fixed cylinder (4) in the further first solid Teien tube optical fiber insertion grooves (4) where exiting of the optical fiber cores (11b) of the spring pressing member (3) ( 3a) and insert the spring retainer (3). Next, while inserting the optical ferrule (1) into the support hole ( 8b ) provided at the tip of the insert-side body (8), insert the spring retainer (3) into the insert-side body (8). ,
While rotating the first fixed cylinder (4), the first fixed cylinder (4) is inserted into the insert-side body (8) and screwed together (12) with mutually provided pipe screws. Then, when the screwing is completed, the supporting flange (1a) of the optical ferrule (1) is connected to the step (8a) of the supporting hole ( 8b ) of the insert-side body (8) via the pressing spring (2).
1), and the spring retainer (3) is fixed so as to abut a step (8a2) provided on the inner surface of the insert-side body (8). After this first operation, the rear body (10) previously passed through the optical cable (11)
After assembling the boot (7) and the second fixed cylinder (6), the rear body (10) is moved in the direction of the cylindrical body (8) on the insert side, and the outer periphery of the first fixed cylinder (4) is moved. And inserted between the inner circumferences of the insert side body (8) and screwed (13). Then, the step (6) of the second fixed cylinder (6)
According to a), the tension member clamp (5) is pressed against the end of the first fixed cylinder (4) to be fixed and assembled.

[0004]

However, in the conventional structure as described above, since the number of parts is as large as 11 parts, it is difficult not only to meet the demand for low price but also to manage parts. It is. Also, in assembling, there is a sequence of assembling the components, and if this is incorrect, the assembly must be performed again. However, since this error increases as the number of accommodated components increases, there is a problem that the assembly is troublesome. As described above, the rear cylindrical body (10) is only screwed to the insert side body (8) without screwing (12) the first fixed cylinder (4) to the inner surface of the insert side body (8). If the housing component can be fixed at a predetermined position, the assembly becomes simple. However, in this case, when the rear cylindrical body (10) is screwed (13) into the insert-side body (8) against the force of the spring force of the pressing spring (2), the rear cylindrical body rotates together with the rotation. The tension member clamp (5), the first fixed cylinder (4), the spring retainer (3) and the like rotate. Therefore tension bunkhouse clamped optical fiber insertion groove (5a) and the spring pressing member (3a) of the optical fiber led to deviations in the relative position (11b) shear forces are <br/> pressurized fairly, thereby light It is easy to cause an accident that damages the fiber core. Therefore, in the conventional structure, the first fixing cylinder (4) is screwed (12) into the insert-side body (8), and the spring holding body (3) is fixed first, and then the rear cylindrical body (10) is fixed. ) Is screwed (13) into the insert-side body (8) to take a two-step assembly procedure for fixing the remaining parts. Generally, when the number of parts accommodated in the body becomes three or more, However, it is inevitable to take the troublesome two-stage or more assembly operation procedure as described above. Further, in order to prevent the rotation of the tension member clamp (5) at the time of screwing (13) of the rear cylindrical body (10) to the insert-side body (8), there is no need to take a screwing method with a pipe screw. As shown in a partial semi-longitudinal sectional view shown in FIG. 6, means for connecting with a connecting screw (14) is used. However, in this case, the number of couplings with the screws (14) must be increased in order to counter the tensile external force applied to the optical cable (11), and since the screws are small, assembly is troublesome. In addition to this, in most cases, the rear cylindrical body (10) is actually fitted into the insert-side body (8) and then rotated to position the screw holes. Is less effective,
It is difficult to prevent rotation of the tension member clamp (5) to prevent damage to the optical fiber core (11b).

[0005]

[Purpose of the Invention] The present invention proposes a multi-core round optical connector which has a small number of parts and is easy to assemble, and is designed to meet the demand for low cost and easy connection of an optical cable to the optical connector. It is.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is attained by having the following components. That is, the optical fiber connected to the terminal of each optical fiber
Ferrule and support holes for positioning each optical ferrule
And a ferrule with an external thread on the outer surface.
And the ferrule insert are inserted into each support hole of the ferrule insert.
Press spring that presses the optical ferrule in the connector fitting direction
And press each of the pressing springs at one end in the direction of the optical ferrule.
And the other end is fixed to the tension member.
And each of the optical fibers is connected to each of the optical fibers.
Grooved optical fiber core positioning for introduction into ferrules
Column- shaped fixing member with a female part, and a contact step that presses the fixing member in the direction of the optical ferrule
And the inner peripheral surface of the ferrule insert
A cylindrical connector with a female thread that engages with the male thread
Connector body , the connector body and the ferrule insert.
A coupling provided in combination with the connector body to grip the optical cable.
The object of the present invention is achieved by providing a configuration including a boot provided so as to be provided . Next, an embodiment of the present invention will be described.

[0007]

FIG. 1 is an explanatory view of an embodiment of the present invention. In the figure, (1) is an optical ferrule, and (1a) is a support flange. (2) is a pressing spring, and (15) is a cylindrical fixing member, which has a pressing spring fixing surface (15a) at one end as shown in the perspective view of FIG. (15b). An optical fiber core positioning portion (15c) is provided on the outer periphery of the fixing member (15), for example, a plurality of optical fiber cores (number of optical fiber cores) which are opened at equal intervals on the peripheral surface. (15c). (16) is a cylindrical ferrule insert,
(16a) is a fixed wall, (16b) is an optical ferrule support hole provided on the same circumference at equal intervals by the number of optical ferrules, (1)
6c) is a contact step of the support flange (1a) of the optical ferrule,
(16d) is a contact step of the fixing member. (17) is a cylindrical connector main body, which presses a fixing member.
It has a contact portion (17a) . And it fits in the outer periphery of a ferrule insert (16), and is screwed (18).
(19) is a boot fixed to the outer periphery of the end of the connector body (17), (9) is a coupling, and the above components are assembled in the following manner.

The tip of the tension member (11a), which has been exposed by stripping off the coating of the optical cable (11), is fixed to the tension member fixing portion (15b) of the fixing member (15). Also, the optical fiber core (11b) is fixed to the fixing member (15).
After that, the optical ferrule (1) is fixed to each end of the optical fiber core (11b) through the pressing spring (2). Then, the optical ferrule (1) and the fixing member (15) are inserted into the ferrule insert (16), and the optical ferrule (1) is inserted into the optical ferrule support hole (16b) provided in the fixing wall (16a). After that, the optical cable (1
The connector body (17) placed through 1) is screwed (18) into the ferrule insert (16), and the connector
The fixing member (15) is pushed by the contact step (17a) of the body (17) . Thus, the pressing spring fixing surface (15a) of the fixing member (15) abuts against the contact step (16d) of the ferrule insert ( 16 ) to press the pressing spring (2) and to support the optical ferrule (1). Tsuba (1
a) is pressed against the contact step ( 16c ) by the pressing spring (2) and fixed to complete the assembly.

As described above, the total number of parts in the present invention is 7 points, which can be reduced as compared with the conventional 11 points, so that the manufacturing cost can be reduced and the parts management can be facilitated accordingly. The price can be reduced. In the case of the present invention, the number of components accommodated and fixed in the ferrule insert (16) and the connector main body (17) is three points of the optical ferrule (1), the pressing spring (2), and the fixing member (15). Therefore , the assembly in the round optical connector of the present invention is as follows.
First assembly operation of the conventional connector shown in FIG.
That is, the first fixed cylinder (4) is inserted into the insert side body (8).
It can be assembled by one operation equivalent to screwing and fixing the optical ferrule (1) and the spring retainer (3).
Second fixed cylinder (6) and tension member clamp (5)
There is no need for an operation of clamping such as by the rear cylindrical body (10). The assembly is therefore much easier than in the prior art. Also, the fixing member (15) in the present invention.
Corresponds to an integrated structure of the spring holding body (3), the first fixed cylinder (4), and the tension member clamp (5) in the conventional structure. The rotation of the tension member clamp (5) based on the thread engagement does not damage the optical fiber core. Further, since there is no first fixed cylinder (4) and its screwing (12) between the spring pressing body (3) and the tension member clamp (5), it is not necessary to take a space between them. Therefore, the length in the longitudinal direction of the connector can be reduced by about 40%, and the size can be reduced.

The embodiment of the present invention has been described above. As shown by the dotted line in the perspective view of FIG. 2, a screw hole (FIG. 2) is formed at the center of the fixing surface (15a) of the pressing spring of the fixing member (15). 15d), and a screw insertion hole ( 16e ) is provided at the center of the fixing wall (16a) of the ferrule insert (16) as shown in the partial longitudinal sectional view of FIG. 3, and the fixing member (15) is fixed by the fixing screw (20). ) And the ferrule insert (16) may be integrated. With this configuration, when the connector body (17) is screwed into the ferrule insert (16), the optical ferrule (1) and the fixing member (15) are positioned in the ferrule insert (16), and may fall off. Since there is no assembly, the assembling is further facilitated, and work sharing by a plurality of persons at the time of assembling becomes easier. Further, since the fixed position of the pressing spring (2) can be fixed to obtain a more stable pressing state,
The optical ferrule (1) can be fixed with a stable and constant force.
After the assembly, the fixing screw (20) may be removed.

[0011]

According to apparent the present invention from the foregoing description of the invention], it may provide an easy round type optical connector of low value and and assembled operation.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention.

FIG. 2 is an explanatory view of components of the present invention.

FIG. 3 is an explanatory view of another embodiment of the present invention.

FIG. 4 is an explanatory view of a conventional connector.

FIG. 5 is an explanatory view of a conventional connector component.

FIG. 6 is an explanatory view showing another example of a conventional connector.

[Description of Signs] (1) Optical ferrule (1a) Support flange (2) Press spring (3) Spring press body (3a) Optical fiber core wire insertion groove (4) First fixed cylinder (5) Tension member clamp (5a) Optical fiber core wire insertion groove (5b) Tension member fixing part (6) Second fixing cylinder (6a) Step (7) Boot (8) Insert side body (8a) Fixed wall (8b) Optical ferrule support hole ( 8c) ) Coupling locking projection (9) Coupling (10) Rear cylindrical body (11) Optical cable (11a) Tension member (11b) Optical fiber core wire (12) Screw (13) Screw (14) Coupling screw ( 15) Cylindrical fixing member (15a) Pressing spring fixing surface (15b) Tension member fixing portion (15c) Optical fiber core wire positioning portion (15d) Screw hole (16) Ferrule insert (16a) Fixed wall (16b) Optical ferrule support hole (16c) Contact step (16d) Contact step (16e) Screw insertion hole (17) Connector body (17a) Fixing member pressing contact Contact (18) Screw (19) Boot (20) Fixing screw

Claims (1)

(57) [Scope of request for utility model registration] 1. A round type optical connector that is assembled to the terminal of the optical cable having a plurality of optical fibers and the tension member, and optical ferrule to be connected the to terminal of each optical fiber, each of said Has a support hole for positioning the optical ferrule
A ferrule insert having an external thread formed on an outer peripheral surface thereof ; and a ferrule insert inserted into each of the support holes of the ferrule insert.
A pressing spring for pressing the ferrule in the fitting direction of the connector, and pressing each of the pressing springs at one end in the direction of the optical ferrule;
It has a fixing surface, and the other end has a fixing portion of the tension member.
Wherein each light Fell with, the respective optical fiber having
Grooved optical fiber core positioning part for introduction into the tool
A cylindrical fixing member but formed, the fixing member while <br/> have a contact step portion for pressing in the direction of the optical ferrule, said ferrule insert on an inner peripheral surface a male
A cylindrical connector main body having a female thread portion screwed to the screw portion, and engaging with the connector main body portion and the ferrule insert
And the optical cable is gripped by engaging with the connector body.
And a boot provided so that the connector body is screwed into the ferrule insert.
When mounting the connector body,
Press the fixing member in the direction of the optical ferrule to fix it.
Circular type optical connector being characterized in that the so that.