JP4215577B2 - Plug with extraction jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plug with a removal jig. More specifically, the present invention relates to a plug with a removal jig that facilitates easy removal of a plug that is mainly fitted to an optical fiber connector and further increases the mounting density.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a plug for a cable that is fitted to an SC type optical connector, for example, an optical fiber connector, is not heightened by removing plug removal parts in order to increase the mounting density. .
[0003]
Therefore, in order to remove the fitted plug from the connector, a separate dedicated tool is required, which is inconvenient in terms of convenience. Therefore, a plug with a removal jig has been proposed and known (for example, see Patent Document 1).
[0004]
[Patent Document 1]
Utility Model Registration No. 2579870 (page 2-4, Fig. 1)
[0005]
[Problems to be solved by the invention]
However, even in this case, in order to extract the plug from the adapter, (1) push the extraction jig in the direction opposite to the extraction direction, release the adapter lock, (2) pull the plug while maintaining the state, A two-action extraction operation is required to extract from the adapter. In addition, the punching jig portion is composed of a large number of parts, which requires a large number of assembly steps and increases manufacturing costs. The plug with a removal jig according to the present invention has been proposed to solve such a problem.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the gist of the plug with a removal jig according to the present invention is to expand the elastic locking piece provided on the adapter side at the taper portion in the plug fitted to the adapter. A pair of engaging portions to be locked by the stepped portion is provided at the tip end portion of the plug housing which is the main body of the plug, and is an unlocking piece provided between the pair of engaging portions, the unlocking The upper surface of the piece is flush with the upper surface of the engaging portion, and a taper portion is provided at the rear end portion for releasing the locking action of the elastic locking piece when the plug is removed, and surrounds the plug housing. It is extended and integrated with an extraction knob that is movable along the insertion / extraction direction,
Stopper means is provided between the plug housing and the removal knob, and the stopper means is fixed to the upper part of the plug housing, and the upper part is loosely fitted into the upper opening of the removal knob, so that it is relatively inserted in the insertion / removal direction. While restricting the movement, the lower part is loosely fitted in the concave part of the flange supporting the ferrule to prevent the ferrule and the flange from being pulled out in the insertion direction,
By the stopper means
When fitting the adapter with the removal knob of the plug,
One side wall surface of the upper opening is in contact with the upper part of the stopper means loosely fitted in the upper opening of the extraction knob,
The plug housing and the removal knob are positioned so as to move simultaneously in the insertion direction,
When removing the plug from the adapter,
Move in the extraction direction until the extraction knob comes into contact with the stopper means loosely fitted in the upper opening,
After releasing the locking action of the elastic locking piece on the adapter side with the locking release piece of the extraction knob, positioning is performed so that the plug housing and the extraction knob simultaneously move in the extraction direction via the stopper means. It is to be done .
[0008]
According to the plug with the extraction jig according to the present invention, the plug housing can be extracted from the adapter only by pulling the extraction knob integral with the locking release piece in the extraction direction of the insertion / extraction direction. Further, the plug housing is smoothly inserted into and removed from the adapter by the stopper means for restricting relative movement between the removal knob and the plug housing .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, the plug 1 with a removal jig according to the present invention will be described with reference to the drawings. The plug 1 with the extraction jig is mainly described as a plug that is fitted to a connector for an optical cable. However, the plug 1 is not limited to the field of the optical cable but is particularly limited to a normal electrical connector, a coaxial cable connector, or the like. Without departing from the spirit of the present invention, the present invention can be applied to any adapter and plug connection structure.
[0010]
As shown in FIG. 1, the plug 1 with the unplugging jig has an elastic locking piece 15 provided on the adapter side (see FIG. 5), which is a mating counterpart, widened by a tapered portion 2 a and a stepped portion. Engaging portions 2c to be locked by 2b are provided at the top and bottom of the plug housing 2 made of synthetic resin, which is the main body of the plug 1, at the top and bottom.
[0011]
At a position adjacent to the engaging portion 2c, an unlocking piece 3a is provided at an intermediate portion between a pair of engaging portions 2c and 2c separated on both sides in the example shown in FIG. As shown in FIGS. 1A and 1B, the upper surface of the unlocking piece 3a is flush with the upper surfaces of the engaging portions 2c and 2c so that the insertion force does not change to prevent half-insertion. It has become. This is a locking piece for releasing the locking relationship between the elastic locking piece 15 and the engaging portion 2c.
[0012]
A taper portion 3b for releasing the locking action of the elastic locking piece 15 is provided at the rear end portion of the locking release piece 3a, and an extending portion 3d extends from the rear end portion. The removal knob 3 that surrounds the outer shell of the plug housing 2 and is movable along the insertion / removal direction and the locking release piece 3a are integrally formed.
[0013]
Between the plug housing 2 and the extraction knob 3, there is provided a stopper 4 which is a stopper means made of metal or synthetic resin for restricting relative movement in the insertion / extraction direction. The stopper 4 is fixed to the upper part of the plug housing 2, and the upper part 4 a protrudes from the upper surface of the plug housing 2 and is loosely fitted in the upper opening 3 c of the extraction knob 3.
[0014]
When the plug 1 is fitted to the other adapter 8 by the stopper 4, the plug housing 2 and the removal knob 3 are simultaneously moved in the insertion direction (left direction in FIG. 1), and the plug 1 is When the adapter 8 is pulled out, after the locking action of the elastic locking piece 15 is released by the locking release piece 3a of the pulling knob 3, the plug housing 2 and the pulling knob 3 are simultaneously pulled out (FIG. 1). In the right direction).
[0015]
As shown in FIGS. 2 to 4, the plug housing 2 and the extraction knob 3 are made of a synthetic resin, and are formed of a plug housing 1a having a fitting portion having an overall rectangular shape and a cylindrical tip portion. It will be.
[0016]
As shown in FIG. 1, reference numeral 5 denotes a ferrule for optical fiber connection, reference numeral 6 denotes a flange for holding the ferrule 5, and reference numeral 7 always biases the flange 6 in the fitting / joining direction. A coil spring is shown. The lower part 4b of the stopper 4 enters the recess 6a of the flange 6 in a loosely fitted state, and prevents the flange 6 biased by the coil spring 7 from coming out in the insertion direction.
[0017]
Thus, the stopper 4 also serves as a member for preventing the flange 6 and the ferrule 5 from coming off. Therefore, it is not necessary to prepare a separate pull-out prevention member, and the number of parts is reduced, resulting in cost reduction. Further, at the time of assembly, the stopper 4 fitted with the plug housing 2 and the extraction knob 3 is inserted halfway in the radial direction and temporarily assembled, and is pushed in a desired amount at the time of connection, which may cause the flange 6 to move in the insertion / extraction direction. The lower portion 4b is loosely fitted into the concave portion 6a.
[0018]
A description will be given of a method of fitting to or removing from the counterpart adapter 8 by using the plug 1 with the extraction jig according to the present invention. First, as shown in FIG. 5A, at the time of fitting, when the extraction knob 3 is pushed in the insertion direction, one side wall surface of the opening 3c comes into contact with the upper portion 4a of the stopper 4, and the insertion direction is positioned. Thus, the plug housing 2 and the removal knob 3 move together in the insertion direction.
[0019]
The taper portion 2a in the engaging portion 2c at the distal end portion of the plug housing 2 is brought into sliding contact with the locking portion 15a of the elastic locking piece 15 and is expanded outward against the elastic force.
Then, as shown in FIG. 5B, the locking portion 15a rides on the upper surface of the engaging portion 2c and moves as it is. The lock release piece 3a moves together with the engagement portion 2c and enters the lock portion 15a.
[0020]
Eventually, as shown in FIG. 5 (C), when the locking portion 15a reaches the stepped portion 2b of the engaging portion 2c, the locking portion 15a drops and locks inward due to the expanded elastic repulsive force. Thereby, the fitting of the plug 1 is completed.
[0021]
Next, when the plug 1 is removed from the adapter 8, as shown in FIG. 6A, the removal knob 3 of the plug 1 is grasped with a finger and pulled in the removal direction. The extraction knob 3 first changes from the state shown in FIG. 5C to the state shown in FIG. 6A, and moves in the extraction direction with respect to the plug housing 2. The reason why the right wall surface of the opening 3c is in contact with the right side surface of the stopper 4 is obvious because the left wall surface of the opening 3c comes into contact with the left side surface of the stopper 4.
[0022]
By the movement of the removal knob 3 in the removal direction, the locking portion 15a of the elastic locking piece 15 on the adapter 8 side expands outward against the elastic force by the action of the tapered portion 3b of the locking release piece 3a. Opened. The plug housing 2 cannot move in the removal direction because the stepped portion 2b is locked to the locking portion 15a.
[0023]
Then, as shown in FIG. 6 (B), when the removal knob 3 moves in the removal direction until it comes into contact with the stopper 4, the locking portion 15a is expanded outward and the locking action with the stepped portion 2b is also released. Is done. Therefore, when the extraction knob 3 is moved in the extraction direction, the plug housing 2 is moved together with being pushed by the stopper 4.
[0024]
Thus, as shown in FIG. 6 (C), the locking portion 15a that has spread outwardly returns to its original position by elastic repulsion while abutting along the tapered portion 2a, and the plug housing 2 and the removal knob 3 Are removed from the adapter 8. The plug 1 can be removed from the adapter 8 simply by pulling the removal knob 3 in the removal direction.
[0025]
Next, according to another embodiment of the present invention, there are cases where a large number of plugs are densely arranged, for example, in a lattice shape, and a finger cannot be directly hung on the plug in the central portion of the lattice shape. There is an example in which the pull tab 9 is used so that the extraction knob 3 can be pulled indirectly in such a case.
[0026]
As shown in FIGS. 7 to 8, the pull tab 9 is entirely made of synthetic resin, and is provided with a cover portion 9a fitted on the outer shell of the extraction knob 3 and a locking projection 9b on the tip side. It is comprised from the attaching part 9c fitted by the boot 10 of the plug 1 from the front-end | tip part to the center part, and the pull part 9d provided in a rear-end part.
[0027]
As shown in FIG. 8, the pull tab 9 is attached to the plug 1 by locking the locking protrusion 9 b to the extraction knob 3. In this state, the plug 1 is fitted to the other adapter 8. For example, in order to remove the plug 1 from the plugs densely arranged in a lattice shape, the pull portion 9d of the pull tab 9 that can be grasped by a finger is grasped and pulled in the removal direction. The pulling knob 3 is pulled, the locking action of the adapter 8 with the elastic locking piece 15 is released, and the plug 1 is easily pulled out from the adapter 8.
[0028]
As described above, the plug 1 with the extraction jig has been described. Further, as shown in FIG. 9, an attenuation film, a filter film, an attenuation fiber, or the like is incorporated in the ferrule 5 as an attenuator 16 for optical transmission. It can be detachably connected in the middle of the optical transmission line. The attenuators 16 can also be connected successfully.
[0029]
【The invention's effect】
As described above, in the plug with a removal jig according to the present invention, in the plug fitted to the adapter, the elastic locking piece provided on the adapter side is expanded at the taper portion and is engaged at the step portion. A pair of engaging portions to be stopped is provided at a distal end portion of a plug housing which is a main body of the plug, and is an unlocking piece provided between the pair of engaging portions, and an upper surface of the locking release piece is It is flush with the upper surface of the engaging portion, and a taper portion is provided at the rear end portion for releasing the locking action of the elastic locking piece when the plug is pulled out. have been integrally extends in the movable removal knob Te, the stopper means between the plug housing and the removal knob is provided, said stopper means is fixed to an upper portion of the plug housing The upper part is loosely fitted in the upper opening of the removal knob to restrict relative movement in the insertion / removal direction, and the lower part is loosely fitted in the concave part of the flange supporting the ferrule so that the insertion direction of the ferrule and the flange is When the stopper means is used to hold the extraction knob of the plug and is fitted to the adapter, the upper portion of the stopper means is loosely fitted in the upper opening of the extraction knob. The one side wall surface of the upper opening abuts and is positioned so that the plug housing and the removal knob move in the insertion direction at the same time, and when the plug is removed from the adapter, the removal knob It moves in the removal direction until it comes into contact with the stopper means loosely fitted in the opening, and the unlocking piece of the removal knob After allowed to release the locking action of the adapter side of the elastic locking piece, since the said plug housing and removal knob through said stopper means is positioned to move in removing direction simultaneously, grabbing the removal knob By simply pulling in the removal direction, the plug can be removed from the adapter, and an excellent effect is obtained that the plug can be easily removed by a single operation. Further, since the unlocking piece is formed integrally with the removal knob and the height of the plug part is not bulky, it is suitable for high-density mounting. Further, since the upper surface of the unlocking piece is flush with the upper surface of the engaging portion, the insertion force does not change and half insertion is prevented. Furthermore, the number of parts is smaller than that of a dedicated punching jig, and it can be manufactured at a low cost as a single unit made of synthetic resin.
[0030]
Further, the stopper means ensures that the plug is fitted and unlocked, and the insertion / extraction action is performed smoothly.
[0031]
Since the stopper also serves as a flange and ferrule pull-out prevention member, it is not necessary to prepare a separate pull-out prevention member, reducing the number of parts and reducing the cost.
[Brief description of the drawings]
FIG. 1 is a front view (A), a plan view (B), and a side view (C) showing a part of a plug 1 with a removal jig according to the present invention in a half section.
FIG. 2 is a perspective view of a plug housing 1a of the plug 1 with a removal jig according to the present invention.
FIG. 3 is a perspective view of a plug housing 2 in the plug 1 with a removal jig according to the present invention.
FIG. 4 is a perspective view of a removal knob 3 in the plug 1 with a removal jig according to the present invention.
FIGS. 5A and 5B are explanatory views (A), (B), and (C) when the plug 1 with a removal jig according to the present invention is fitted.
FIGS. 6A and 6B are explanatory views (A), (B), and (C) at the time of removing the plug 1 with a removal jig according to the present invention.
7 is a plan view (A), a front view (B), and a side view (C) of the pull tab 9. FIG.
FIG. 8 is a plan view (A), a front view (B), and a side view (C) when the pull tab 9 is attached to the plug 1 with a removal jig according to the present invention.
FIG. 9 is a cross-sectional view (A), a front view (B), and left and right side views (C) and (D) of an example in which the removal jig is applied to the attenuator 16;
[Explanation of symbols]
1 Plug with extraction jig, 2 Plug housing,
2a taper part, 2b step part,
2c engaging part, 3 extraction knob,
3a unlocking piece, 3b taper part,
3c opening, 4 stopper,
5 Ferrule, 6 Flange,
7 Coil spring, 8 Adapter,
9 Pull tab, 9a Cover part,
9b Locking projection, 9c Mounting part,
9d pull section, 10 boots,
15 elastic locking piece, 15a locking part,
16 Attenuator.

Claims (1)

In the plug fitted to the adapter, a pair of engaging portions for expanding the elastic locking piece provided on the adapter side at the taper portion and locking at the stepped portion is a plug housing which is the main body of the plug. An unlocking piece provided between the pair of engaging portions, provided at the distal end portion, the upper surface of the unlocking piece being flush with the upper surface of the engaging portion, and a plug at the rear end portion A taper portion for releasing the locking action of the elastic locking piece at the time of extraction is provided, and the plug housing is extended and integrated with an extraction knob that is movable along the insertion / extraction direction,
Stopper means is provided between the plug housing and the removal knob, and the stopper means is fixed to the upper part of the plug housing, and the upper part is loosely fitted into the upper opening of the removal knob, so that it is relatively inserted in the insertion / removal direction. While restricting the movement, the lower part is loosely fitted in the concave part of the flange supporting the ferrule to prevent the ferrule and the flange from being pulled out in the insertion direction,
By the stopper means
When fitting the adapter with the removal knob of the plug,
One side wall surface of the upper opening is in contact with the upper part of the stopper means loosely fitted in the upper opening of the extraction knob,
The plug housing and the removal knob are positioned so as to move simultaneously in the insertion direction,
When removing the plug from the adapter,
Move in the extraction direction until the extraction knob comes into contact with the stopper means loosely fitted in the upper opening,
After releasing the locking action of the elastic locking piece on the adapter side with the locking release piece of the extraction knob, positioning is performed so that the plug housing and the extraction knob simultaneously move in the extraction direction via the stopper means. Being
A plug with a removal jig characterized by

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