JP7084266B2 - Uniboot plug connector for LC - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Date of publication August 1, 2018 Publication address https: // sanwa-us. com / https: // sanwa-us. com / news-events / The following will be posted from August 30, 2018 https: // sanwa-us. com / 2018/08/30 / lc-multifaction-unibot-connector /

The present invention relates to a two-core LC uniboot plug connector for bidirectional communication, which has a pair of LC type optical connectors and is mainly a uniboot type.

Conventionally, with the spread of the Internet and the like, the demand for a two-core optical connector unit for bidirectional communication having an optical connector for input and an optical connector for output is rapidly increasing as a kind of optical connector. In this case, the two-core optical plug connector needs to replace the positions of the pair of optical connectors due to its polarity reversal.

Therefore, in recent years, in order to make the positions of the pair of optical connectors interchangeable, the two-core optical plug connector includes a pair of optical connectors attached to the tips of a pair of optical fiber cables (not shown). It includes a connector housing that holds each ferrule housing and a single boot (uniboot structure) that simultaneously protects each pair of optical fiber cables extending rearward from the connector housing.

Specifically, as shown in Patent Document 1, each ferrule housing of a pair of optical connectors is held and integrated, and a holding for accommodating each core wire of a pair of optical fiber cables extending rearward from each ferrule housing. It comprises a boot that simultaneously protects the body, a pair of optical fiber cables extending rearward from the holding body, and a lever connecting body that is detachably provided to the holding body, and the lever connecting body is a pair. A two-core optical plug connector is formed by connecting the latch lever to the tip end side of the operation lever attached to the rear end of the lever connecting body to give elasticity so that the latch lever corresponds to each ferrule housing. It is known.

When using the 2-core optical plug connector, a pair of optical connectors are inserted into each insertion opening of the optical adapter. At this time, the locking portions protruding from both sides of each intermediate portion of the latch lever hit the upper edge of each insertion opening and are once pushed down, and then the elasticity between the operation lever and each latch lever. The locking portion engages with the locking groove provided in the optical adapter. As a result, the optical connector is prevented from being pulled out from the optical adapter.

When pulling out the pair of optical connectors from each insertion opening of the optical adapter, the operating lever is manually pressed downward against the elasticity between the operating lever and the latch lever. Then, each of the latch levers is simultaneously pushed down together with the locking portions protruding from both sides of the intermediate portion, and the locking portion is released from the engagement with the locking groove provided in the optical adapter. As a result, the pair of optical connectors is smoothly removed from each insertion opening of the optical adapter by the tapered surface of the rear end of the engaging protrusion of the latch lever and the elastic function of the lever connecting body.

Japanese Unexamined Patent Publication No. 2016-40587

However, in the two-core optical plug connector shown in Patent Document 1 described above, when the plug is pulled out, the operating lever attached to the upper surface side of the holding body is pulled out while being manually pressed downward, so that the connector is mainly high. In an optical connector system with density mounting, there is a risk of accidentally unplugging other connected plugs. This erroneous omission occurs especially in an optical connector used in a LAN relationship or the like equipped with a high density of optical transmission lines.

Further, in the 2-core optical plug connector shown in Patent Document 1 described above, even if the left and right positions of the ferrules are changed by removing the lever connecting body from the holding body, the ferrules themselves cannot be turned upside down. APC polishing (Angled PC) in which the tip is polished into an oblique convex spherical surface cannot be used.

Incidentally, the ferrule by APC polishing (Angled PC), which is often used in video transmission and the like, has a configuration in which the tip of the ferrule is polished into an oblique convex spherical shape so that the reflected light is not returned to the light source side. There is no connection compatibility with ferrules by polishing (Physical Contact) or SPC polishing (Super PC). Moreover, although the method by APC polishing (Angled PC) can easily realize the amount of reflected light attenuation at the contact portion between the fibers to 55 dB or more, it is necessary to suppress the rotation of one of the ferrules around the axis to be small.

Therefore, the present invention has been devised in view of the above-mentioned conventional circumstances, and when a pair of optical connectors is pulled out from each insertion opening of an optical adapter, another pair of optical connectors being connected is connected. It is possible to prevent the connector from being accidentally pulled out, which makes it possible to construct various plug security systems with excellent convenience, and at the same time, it is possible to change the polarity (roll) of a pair of optical connectors without exposing the core wire with a simple operation. Uniboots for LC that can perform over), support ferrules by APC polishing (Angled PC), and also support Push / Pull to meet the need for high-density mounting. It is intended to provide a plug connector.

In order to solve the above-mentioned problems, in the present invention, the preasses of the pair of optical connectors are held and integrated, and the core wires of the pair of optical fiber cables extending rearward from the preasses are accommodated. It is provided with a holder, boots for simultaneously protecting each of a pair of optical fiber cables extending rearward from the holder, and a slider lever connector provided detachably with respect to the holder.
The slider lever connecting body includes a slider having a tab for pulling out a connector attached to the rear end.
A latch integrated lever that is fixed to the holder by sandwiching the slider from above is provided.
The latch integrated lever is provided with a pair of left and right locking holding pieces for holding and fixing the holder from both the left and right sides, and the central narrow portion of the slider is slidable by a predetermined distance in the front-rear direction. A holding base with a groove shape to engage with,
An intermediate arm portion extending forward from the holding base portion in a bifurcated manner,
Locking portions that are connected through the intermediate arm portion to form a character in a lateral view and are formed with elasticity and are engaged with the locking grooves of the adapter are provided on both sides of each intermediate portion. With a protruding latch,
The pin-shaped portion formed on the tip end side of the intermediate arm portion and
With an engaging protrusion formed at the tip of the latch,
The slider comprises a pair of latch insertion openings with a cam tilted surface inside at its front end.
The latch is inserted into the latch insertion opening from the tip end side thereof, the engaging protrusion of the latch tip is engaged with the engaging recess of the preasse, and the pin-shaped portion of the intermediate arm portion is inclined to the cam. It is characterized in that each contact is held on the surface portion.

The slider lever connecting body pulls the slider rearward through the tab with respect to the latch integrated lever, and the pin-shaped portion is pushed downward along the cam inclined surface portion provided on the slider to push the tip of the intermediate arm portion. It is characterized in that it is curved downward and is released from being caught by the locking portion of the latch with respect to the locking groove formed in the adapter so that it can be pulled out.

The slider lever connecting body has a tab from the reference position when the guide key protrusion provided on the lower surface side of the slider abuts on the front end of the guide key groove provided on the upper surface side of the holder. When the slider is pulled backward through, the pin-shaped portion of the latch integrated lever hits the cam inclined surface portion provided on the slider, and the intermediate arm portion moves downward so that the pin-shaped portion is pushed downward along the cam inclined surface portion. It is characterized by being deformed.

In the slider lever connecting body, when the slider slides backward from the reference position, the protruding groove-shaped portion provided on the lower surface side of the slider engages with the groove-shaped portion provided on the upper surface side of the holder. It is characterized by being formed in such a manner.

The boot is attached to the holder via a caulking holder and a caulking assay, the holder is rotatable around the caulking holder, and each preasse is held by the holder by its own shaft cylinder portion. It is characterized by being rotatable.

Each preasse has a circular flange portion that is rotatably locked to the holder at the end of each shaft cylinder portion, and each preasse has a locking projection on the peripheral surface of the circular flange portion. The holder is provided with a stopper surface so that the locking projection is locked at a normal position at an angle of 0 ° and an inverted position at an angle of 180 °.

According to the present invention, when a pair of optical connectors is pulled out from each insertion opening of the optical adapter, it is possible to prevent the other pair of optical connectors being connected from being accidentally pulled out, and various plug security systems are constructed. to enable. In addition, it is possible to change the polarity (rollover) of a pair of optical connectors with simple work and without exposing the core wire, and it also supports ferrules by APC polishing (Angled PC), and also for Push / Pull. By responding, it is possible to meet the need for high-density mounting.

That is, in the present invention, each preasse of the pair of optical connectors is held and integrated, and a holder for accommodating each core wire of the pair of optical fiber cables extending rearward from each preasse and a holder extending rearward from the holder. It is equipped with a boot that protects each of the pair of optical fiber cables at the same time, and a slider lever connector that is detachably provided for the holder.
The slider lever connecting body includes a slider having a tab for pulling out a connector attached to the rear end.
A latch integrated lever that is fixed to the holder by sandwiching the slider from above is provided.
The latch integrated lever is provided with a pair of left and right locking holding pieces for holding and fixing the holder from both the left and right sides, and the central narrow portion of the slider is slidable by a predetermined distance in the front-rear direction. A holding base with a groove shape to engage with,
An intermediate arm portion extending forward from the holding base portion in a bifurcated manner,
Locking portions that are connected through the intermediate arm portion to form a character in a lateral view and are formed with elasticity and are engaged with the locking grooves of the adapter are provided on both sides of each intermediate portion. With a protruding latch,
The pin-shaped portion formed on the tip end side of the intermediate arm portion and
With an engaging protrusion formed at the tip of the latch,
The slider comprises a pair of latch insertion openings with a cam tilted surface inside at its front end.
The latch is inserted into the latch insertion opening from the tip end side thereof, the engaging protrusion of the latch tip is engaged with the engaging recess of the preasse, and the pin-shaped portion of the intermediate arm portion is inclined to the cam. Since each contact is held on the surface,
In a uniboot type 2-core type LC uniboot plug connector for bidirectional communication having a pair of LC type optical connectors, a slider lever is connected when the pair of optical connectors is pulled out from each insertion opening of the optical adapter. The body can be easily pulled out by pulling the slider backwards through the tab against the latch-integrated lever, preventing accidental pulling out of the other pair of optical connectors in connection.

The slider lever connector pulls the slider rearward through the tab with respect to the latch integrated lever, and the pin-shaped portion is pushed downward along the cam inclined surface portion provided on the slider to push the tip of the intermediate arm portion. Since it is curved downward and can be pulled out by releasing the catch by the locking part of the latch on the locking groove formed in the adapter, the engagement and disengagement of the locking part of the latch with respect to the locking groove of the adapter can be connected. It can be done smoothly by operating the tab without interfering with the other LC type optical connectors inside. Moreover, since the latch moves downward through the deformation of the intermediate arm portion and disengages the locking portion of the latch with respect to the locking groove of the adapter, an excessive load (weight) is not applied to the latch itself.

The slider lever connecting body has a reference position when the guide key protrusion provided on the lower surface side of the slider abuts on the front end of the guide key groove provided on the upper surface side of the holder, and tabs from the reference position. When the slider is pulled backward through, the pin-shaped portion of the latch integrated lever hits the cam inclined surface portion provided on the slider, and the intermediate arm portion moves downward so that the pin-shaped portion is pushed downward along the cam inclined surface portion. Since it is deformed, the locking portion of the latch can be reliably engaged and disengaged from the locking groove of the adapter without applying an excessive load to the intermediate arm portion.

In the slider lever connecting body, when the slider slides backward from the reference position, the protrusion-shaped groove-shaped portion provided on the lower surface side of the slider engages with the groove-shaped portion provided on the upper surface side of the holder. When a force that pushes the pin-shaped portion downward is applied to the cam inclined surface portion, a force that pushes the slider upward from the pin-shaped portion through the cam inclined surface portion is generated as a reaction force. When a force is generated, the protruding groove-shaped portion engages with the groove-shaped portion to receive an upward reaction force, and it is possible to prevent the slider from rising.

The boot is attached to the holder via a caulking holder and a caulking assay, the holder is rotatable around the caulking holder, and the preasse is held by the holder by its own shaft cylinder and rotates. Since it is free, the holder can be rotated 180 ° around the axis by removing the slider lever connector from the holder, and then the polarity can be changed (rollover) by assembling the slider lever connector.

Each preasse has a circular flange portion that is rotatably locked to the holder at the end of each shaft cylinder portion, and each preasse has a locking projection on the peripheral surface of the circular flange portion. Since the stopper surface is provided opposite to the holder so that the locking projection is locked at the normal position at an angle of 0 ° and the inverted position at an angle of 180 °, the holder portion is rotated by 180 ° and at the same time, each preasse is rotated. By rotating it around the direction and locking the locking protrusion on the stopper surface of the holder at a rotation position of 180 °, it is possible to change the polarity (rollover) corresponding to the ferrule by APC polishing (Angled PC).

It is a slider lever connecting body of the uniboot plug connector for LC which shows one embodiment for carrying out this invention, (a) is an exploded perspective view, (b) is a perspective view after assembly. A 2-core type uniboot plug connector for LC with the slider lever connector removed is shown, (a) is an exploded perspective view, and (b) is a perspective view after assembly. A 2-core type uniboot plug connector for LC with a slider lever connector attached is shown, FIG. 1A is a perspective view, and FIG. .. An example of the Priasse is shown, (a) is a plan view, (b) is a front view, (c) is a side view, and (d) is a rear view. Similarly, an example of the preasse is shown, (a) is a perspective view seen from an oblique front, (b) is a perspective view seen from an oblique rear, and (c) is a sectional view taken along the line AA of FIG. 4 (c). An example of the holder is shown, (a) is a perspective view seen from diagonally above, and (b) is a perspective view seen from diagonally below. Similarly, an example of the holder is shown, (a) is a plan view, (b) is a front view, (c) is a side view, (d) is a rear view, and (e) is a bottom view. Similarly, an example of the holder is shown, where FIG. 7 (a) is a sectional view taken along line BB of FIG. 7 (c), and FIG. 7 (b) is a sectional view taken along the line CC of FIG. 7 (c). An example of the latch integrated lever is shown, where (a) is a perspective view seen from diagonally forward, and (b) is a perspective view seen from diagonally rearward. Similarly, an example of the latch integrated lever is shown, where (a) is a plan view, (b) is a front view, (c) is a side view, (d) is a rear view, and (e) is a bottom view. An example of the slider is shown, where (a) is a perspective view seen from diagonally rearward, (b) is a perspective view seen from diagonally forward, and (c) is a perspective view seen from diagonally below. Similarly, an example of the slider is shown, where (a) is a plan view, (b) is a front view, (c) is a side view, (d) is a rear view, and (e) is a bottom view. Similarly, an example of the slider is shown, where FIG. 12A is a sectional view taken along the line DD of FIG. 12A, and FIG. 12B is a sectional view taken along the line EE of FIG. 12A. Similarly, an example of the slider is shown, where (a) is a plan view in a state where a tab is attached to the slider, and (b) is a sectional view taken along the line FF of (a). It shows the whole structure of the slider-lever connecting body, (a) is a plan view, (b) is an OH sectional view of (a), and (c) is a GG sectional view of (a). The overall configuration of the uniboot plug connector for LC is shown, (a) is an enlarged front view, and (b) is a side view. Similarly, the overall configuration of the uniboot plug connector for LC is shown, (a) is a plan view, (b) is a JJ sectional view of (a), (c) is an II sectional view of (a), (d). ) Is a cross-sectional view taken along the line KK of (a). Similarly, the usage state of the uniboot plug connector for LC is shown, (a) is an explanatory diagram showing the state before being inserted into the adapter, (b) is an explanatory diagram showing the state before being inserted into the adapter, and (c) is before the deformation of the latch. An explanatory diagram showing an outline of the state of the above, (d) is an explanatory diagram showing an outline of the state after the deformation of the latch. It is explanatory drawing of the rollover operation, (a) is the perspective view in the state which the slider lever connecting body was removed, (b) to (d) are the perspective view of the state in the process of rotating each preasse gradually to 180 °, (e). ) Is a perspective view of the state in which the rotation of each preasse is completed. Similarly, it is an explanatory view of the rollover operation, (a) to (c) are the perspective views of the state in which the holder is rotated 180 °, and (d) is the perspective view of the state in which the rotation of the holder is completed.

Hereinafter, an embodiment of the LC uniboot plug connector according to the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1, 2, and 3, the LC uniboot plug connector according to the present invention all holds the preasses A and B of the LC type optical connector having the same structure, and the preasses A and B are respectively. A holder 1 for accommodating each of a pair of optical fiber core wires P (see FIGS. 4 (d) and 5 (c)) extending rearward from the holder 1 and a pair of optical fiber cables extending rearward from the holder 1 (not shown). ) It is provided with a boot 2 that protects each of them at the same time, and a slider lever connector 20 that is attached to the holder 1 so as to be detachable from above.

<Composition of Preasse>
As shown in FIGS. 4 and 5, the preasses A and B (each of the preasses A and B have the same structure) are a ferrule F having an insertion hole through which the core wire P of the optical fiber is inserted and the ferrule F. The ferrule housings 10A and 10B for holding and accommodating a tube (not shown) extending rearward via a flange portion (not shown) of each ferrule F, and the ferrule housings 10A and 10B incorporated in the ferrule housings 10A and 10B. It is generally composed of a coil spring (not shown) in which one end is locked to the flange portion, and an extender cap E that closes the rear open side of the ferrule housings 10A and 10B. The extender cap E has a function of pulling out the optical fiber cable rearward through the central hole thereof and locking the other end of the coil spring.

Further, since the coil spring is mounted in a compressed state between the flange portion (not shown) and the extender cap E in the optical axis direction, the ferrule F is urged toward the tip side by the elastic force of the coil spring. To. Further, the ferrule housings 10A and 10B themselves are between the upper and lower recesses 13a and 13b on the front side of the holder 1 via the circular constricted shaft cylinder portion 3 formed on the rear outer peripheral surface of the extender cap E (FIG. 6, which will be described later). (See FIGS. 7 and 8), which is rotatably held.

A circular flange portion 4 is continuously provided at the end of the barrel portion 3, and is rotatably locked between the upper and lower recesses 13a and 13b of the holder 1. That is, a locking projection 4A is formed at one position on the peripheral surface of the circular flange portion 4, and the stopper surfaces S (FIGS. 3B and 8) formed in the upper and lower recesses 13a and 13b described later of the holder 1 are formed. (B)), the ferrule housings 10A and 10B are configured such that the locking projection 4A is locked at a normal position at an angle of 0 ° and an inverted position at an angle of 180 °. Further, on each of the upper and lower two surfaces of the ferrule housings 10A and 10B (preasses A and B), engagement recesses V having a substantially rectangular shape in a plan view and a concave surface having a substantially arcuate inner bottom surface in a front view are recessed. The tip of each latch 43 of the slide lever connecting body 20, which will be described later, is engaged with each other.

<Holder configuration>
As shown in FIGS. 6, 7, and 8, the holder 1 has a substantially square tube half-split shape having an upper and lower half-split structure of a lower half-split body 1A and an upper half-split body 1B, and has a lower side. The locked portions 8b (see FIGS. 2A and 6B) inside the recess formed on the left and right side walls of the half split body 1A are formed on the left and right side walls of the upper half split body 1B. By engaging the locking claws (not shown) inward from the lower end of the locking piece 8a, each of the half split bodies 1A and 1B is integrated with the holder 1 having a substantially square tube shape as a whole. Become. Therefore, a guide groove 8c is vertically provided behind the locked portion 8b on the left and right side walls of the lower half split body 1A, and locking pieces provided on both the left and right walls of the upper half split body 1B in the guide groove 8c. 24 is engaged. At this time, the guide groove 8c is formed deeper than the locked portion 8b on the front side, and even when the locking piece 24 is engaged, the locking holding pieces 41A provided on both rear sides of the latch integrated lever 40 described later. Is fitted to the outer locked groove 24a of the locking piece 24 while being polymerized.

Then, on the front side of each of the half-split bodies 1A and 1B, recesses 13a and 13a for rotatably engaging the barrel portions 3 and 3 formed at the rear portions of the ferrule housings 10A and 10B, respectively. The large-diameter flange portion 21a at the tip of the cylindrical caulking holder 21 (see FIG. 17 (c)) is rotatably formed between the half split bodies 1A and 1B at the rear end of the holder 1. The caulking 22a side of the heat-shrinkable tube 22 (caulking assay) having a caulking ring 22a at the tip is externally fitted to the reduced diameter portion 21b on the rear side of the caulking holder 21 and caulked from the outer circumference. It is fixed.

Further, each core wire P extending from the rear portion of each of the ferrule housings 10A and 10B is accommodated between the half split bodies 1A and 1B, and a pair of optical fiber cables in which the core wires P are inserted in the caulking holder 21. The ends are inserted together and extend rearward through the caulking holder 21. Further, the tip opening side of the boot 2 is extrapolated and fixed to the caulking ring 22a so as to cover the heat shrink tube 22.

Groove-shaped portions 23 having a substantially U-shaped groove in the front view are formed at two locations in the center of the upper and lower surfaces on the front end side of the holder 1 and at four locations above and below each of the left and right ends, corresponding to the groove-shaped portions 23. A protrusion-shaped groove-shaped portion 31 having a substantially U-shaped groove in the front view is formed at two central locations on the lower surface side of the slider 30 and one on each of the left and right ends, which will be described later. When the protrusion type groove-shaped portion 31 and the groove-shaped portion 23 are engaged with each other in a state of being in mesh with each other when sliding backward from the position, the slider 30 is prevented from rising.

<Structure of slider lever connection>
As shown in FIGS. 1, 2, and 3, the slider lever connecting body 20 has a slider 30 having a tab T for pulling out a connector attached to the rear end thereof, and the slider 30 is sandwiched from above. It is generally composed of a latch integrated lever 40 that is mounted and fixed to the holder 1.

<Structure of lever with integrated latch>
As shown in FIGS. 9, 10, 15, 16, and 17, the latch integrated lever 40 has a wide flat holding base portion 41 and the holding base portion 41 facing forward. A latch 43 formed by connecting the intermediate arm portions 42, 42 extending in a bifurcated shape and each of the intermediate arm portions 42, 42 so as to exhibit a character shape to the side view, and imparting elasticity. , 43 and.

Vertical rectangular plate-shaped locking holding pieces 41A and 41A are provided on the left and right ends of the holding base portion 41, and the slider 30 is sandwiched from above so as to be engaged on the left and right side surfaces of the holder 1. The locking projections 41B and 41B, in which the locking holding pieces 41A and 41A are fitted into the stop grooves 24a and 24a and are projected inside the lower ends of the locking holding pieces 41A and 41A, are the locked grooves 24 and 24. By engaging with the locking portions 24A and 24A formed in the holder 1, the holding base portion 41 (latch integrated lever 40) is sandwiched and fixed from both the left and right sides of the holder 1.

The holding base portion 41 has a groove-shaped portion 48 with which the central narrow portion 32 of the slider 30 is engaged, and the position of the slider 30 is restricted in the left-right direction. That is, the width dimension of the central narrow portion 32 of the slider 30 is set to engage with the groove-shaped portion 48 provided on the latch integrated lever 40. When the slider 30 is assembled to the latch integrated lever 40, the slider 30 moves back and forth (axially) along the groove-shaped portion 48.

Further, on both sides of the holding base portion 41 in the width direction, slide holding grooves 47, 47 having a portion on the upper surface side cut out in a substantially L-shape in a plan view are formed in the rear corner portion, and the slider is formed. Rectangular block-shaped locking projections 33, 33 projecting from the left and right ends of the upper surface of the rear portion 30 toward the front (axial direction) are engaged with the slide holding grooves 47, 47. Pressing surface portions 33A and 33A are formed on the lower side of the locking projections 33 and 33, and when the tab T is pushed forward and the slider 30 moves forward, the pressing surface portion 33A causes the holder 1 to move forward. Is pushed forward.

The latches 43 and 43 have locking portions 44 and 44 projecting from both sides of each intermediate portion (four locations in total), and are locked when the above-mentioned ferrule F is fitted to the split sleeve W. The portion 44 is engaged with the locking groove Q1 of the adapter Q (see FIG. 18). Further, on the tip end side of the intermediate arm portions 42, 42 (the connecting portion between the latch 43 and the intermediate arm portion 42), pin-shaped portions 46, 46 made of a cylinder slightly longer than the width dimension of the intermediate arm portions 42, 42 are formed. , The intermediate arm portions 42, 42 are attached in a state of being sideways with respect to the length direction.

Engagement protrusions 45, 45 are formed at the tips of the latches 43, 43, and correspondingly, the latches 43, 43 are engaged on the upper and lower two surfaces of the ferrule housings 10A and 10B, respectively. A pair of engaging recesses V, V for engaging the abutment portions 45, 45 in a detachable manner are formed. Further, the lower surfaces of the engaging protrusions 45 and 45 are formed so as to correspond to the concave surface having a substantially arc shape in the front view, and the inner bottom surfaces of the engaging recesses V and V correspond to the convex surface. The protrusions 45, 45 and the engaging recesses V, V are engaged and connected at predetermined positions without lateral displacement while maintaining a close contact state.

<Slider configuration>
As shown in FIGS. 11, 12, and 13, the slider 30 is a substantially flat block in which a central narrow portion 32 in which a groove-shaped portion 48 on the lower surface of the holding base portion 41 is engaged is formed in an intermediate portion thereof. It is formed in a shape. Further, the rear side of the slider 30 is wider than the central narrow portion 32, and a T-shaped groove portion 34 is formed on the upper surface thereof, and the T-shaped protrusion Ta at the tip of the tab T described above is assembled. The lower surface of the slider 30 where the T-shaped groove 34 is located is a recess 39 having a substantially arc shape in front view corresponding to the outer shape of the boot 2. Further, a guide key protrusion 37 is projected on the front side of the lower surface of the slider 30 with respect to the central narrow portion 32, and a guide key groove 38 (the above) formed in the center of each of the upper and lower two surfaces of the holder 1. (See FIGS. 6 and 7).

The front side of the slider 30 has the same lateral width as the rear side of the slider 30, and a pair of left and right latch insertion openings 35, 35 are formed on the upper surface thereof via a step, and these latch insertion openings are formed. The lower surface side between the front edge of the openings of 35 and 35 and the front end of the slider 30 is provided with a pair of left and right cam inclined surface portions 36 and 36 which are inclined downward toward the front (see FIGS. 12 and 13). .. Then, the latches 43 and 43 are inserted into the latch insertion openings 35 and 35 from the tip end side thereof, and the engaging protrusions 45 and 45 at the tip portions of the latches 43 and 43 are engaged with the ferrule housings 10A and 10B. While being engaged and held in the joint recesses V and V, the pin-shaped portions 46 and 46 at the front ends of the intermediate arm portions 42 and 42 are held in contact with the cam inclined surface portions 36 and 36, respectively.

The slider lever connecting body 20 has a reference position when the groove-shaped portion 48 of the holding base portion 41 comes into contact with the front end of the central narrow portion 32 of the slider 30. Then, when the slider 30 is pulled backward from this reference position through the tab T, the pin-shaped portions 46, 46 of the latch integrated lever 40 hit the cam inclined surface portions 36, 36 provided on the slider 30, and the cam inclined surface portion 36, The intermediate arm portions 42, 42 are deformed so that the pin-shaped portions 46, 46 are pushed downward along the 36. That is, the pin-shaped portions 46, 46 are pushed downward by the cam inclined surface portions 36, 36, and the tips of the intermediate arm portions 42, 42 are curved and deformed in a downward tension shape, and a locking groove formed in the adapter Q. The latches 43 and 43 are released from being caught by the locking portions 44 and 44 with respect to Q1 so that they can be pulled out.

The slider 30 has protrusion-shaped groove-shaped portions 31 having a substantially U-shaped groove in the front view formed at two central locations on the lower surface side and one each on the left and right ends, and the slider 30 is rearward from the reference position. When the protrusion type groove-shaped portion 31 and the groove-shaped portion 23 are engaged with each other in a state of being in mesh with each other when sliding to, the slider 30 is prevented from rising.

Next, an example of use / operation of the form configured as described above will be described.

<When inserting into the adapter with PUSH>
As shown in FIG. 18A, the slider 30 is pushed from the tab T, and the holder 1 is pushed by the pressing surface portion 33A on the lower side of the locking projection 33 of the slider 30 (arrow X in FIG. 18B). direction). Then, this becomes a force that pushes the entire plug, and the latch 43 is pushed until it is locked in the locking groove Q1 on the adapter Q side, and when the ferrule F is fitted into the split sleeve W, the locking portion 44 becomes the adapter. By engaging with the locking groove Q1 of Q (see FIG. 18), the plug is inserted.

<When removing from the adapter with PULL>
First, the position where the slider 30 abuts on the front end with respect to the latch integrated lever 40, that is, the guide key protrusion 37 provided on the lower surface side of the slider 30 is provided on the upper surface side of the holder 1. The reference position is when it comes into contact with the front end of the. As shown in FIGS. 18 (c) and 18 (d), when the slider 30 is pulled backward through the tab T from this reference position, the pin-shaped portion of the latch integrated lever 40 is attached to the cam inclined surface portion 36 provided on the slider 30. The intermediate arm portion 42 is deformed so that the pin-shaped portion 46 is pushed downward along the cam inclined surface portion 36 when the 46 hits. That is, the pin-shaped portion 46 is pushed downward by the cam inclined surface portion 36 to bend and deform the tip of the intermediate arm portion 42 downward in a stretched manner, and the latch 43 engages with the locking groove Q1 formed in the adapter Q. The catch by the stop portion 44 is released, and the adapter Q can be pulled out.

<Explanation of rollover>
When changing the polarity (rollover) of the pair of optical connectors, first, as shown in FIG. 19A, the slider lever connecting body 20 is removed from the holder 1.

First, as shown in FIGS. 19B to 19E, a stopper having a locking projection 4A of the circular flange portion 4 formed at the end of the shaft cylinder portion 3 of the extender cap E formed in the upper concave portion 13b. From the state of the normal position locked to the surface S, only each of the preasses A and B (ferrule housings 10A and 10B) is rotated by 180 ° with respect to the holder 1 (in the direction of each arrow in the figure).

Then, after the rotation is completed (state in FIG. 19E), the locking projection 4A of the circular flange portion 4 formed at the end of the shaft cylinder portion 3 of the extender cap E is formed in the lower recess 13a. It is locked to the stopper surface S, and the preassess A and B are turned upside down with respect to the holder 1.

Next, as shown in FIGS. 20 (a) to 20 (d), the holder 1 is rotated by 180 ° around the axial direction with the flange portion 21a at the tip of the caulking holder 21 (see FIG. 17 (c)) as the rotation axis (FIG. 17). Middle each arrow direction).

Then, after the rotation is completed (state in FIG. 20D), the preasse A and the preasse B are switched left and right to change the polarity, but the rotation position of the ferrule F remains the same as the initial position. As a result, it is possible to cope with ferrule F by APC polishing (Angled PC) by rollover.

P Core wire Q Adapter Q1 Locking groove T Tab Ta T-shaped protrusion A, B Priasse S Stopper surface E Extender cap F Ferrule V Engagement recess W Split sleeve 1 Holder 1A Lower half split body 1B Upper half split body 2 Boots 3 axes Cylindrical part 4 Circular flange part 4A Locking protrusion 8a Locking piece 8b Locked part 8c Guide groove 10A, 10B Ferrule housing 13a Lower concave part 13b Upper concave part 20 Slider lever connecting body 21 Caulking holder 21a Flange part 21b Reduced diameter part 22 Heat Shrink tube 22a Caulking 23 Groove shape 24 Locking piece 24a Locking groove 24A Locking part 30 Slider 31 Protruding groove shape part 32 Center width narrow part 33 Locking protrusion 33A Pressing surface part 34 T-shaped groove part 35 Latch insertion opening Part 36 Cam inclined surface part 37 Guide key protrusion 38 Guide key groove 39 Indentation part 40 Latch integrated lever 41 Holding base part 41A Locking holding piece 41B Locking protrusion 42 Intermediate arm part 43 Latch 44 Locking part 45 Engagement protrusion 46 Pin shape 47 Slide holding groove 48 Groove shape

Claims (6)

A holder that holds and integrates each preasse of the pair of optical connectors and accommodates each of the core wires of the pair of optical fiber cables that extend rearward from each preasse, and a pair of optical fiber cables that extend rearward from the holder. It is equipped with a boot that simultaneously protects the light and a slider lever connector that is detachably provided for the holder.
The slider lever connecting body includes a slider having a tab for pulling out a connector attached to the rear end.
A latch integrated lever that is fixed to the holder by sandwiching the slider from above is provided.
The latch integrated lever is provided with a pair of left and right locking holding pieces for holding and fixing the holder from both the left and right sides, and the central narrow portion of the slider is slidable by a predetermined distance in the front-rear direction. A holding base with a groove shape to engage with,
An intermediate arm portion extending forward from the holding base portion in a bifurcated manner,
Locking portions that are connected through the intermediate arm portion to form a character in a lateral view and are formed with elasticity and are engaged with the locking grooves of the adapter are provided on both sides of each intermediate portion. With a protruding latch,
The pin-shaped portion formed on the tip end side of the intermediate arm portion and
With an engaging protrusion formed at the tip of the latch,
The slider comprises a pair of latch insertion openings with a cam tilted surface inside at its front end.
The latch is inserted into the latch insertion opening from the tip end side thereof, the engaging protrusion of the latch tip is engaged with the engaging recess of the preasse, and the pin-shaped portion of the intermediate arm portion is inclined to the cam. Uniboot plug connector for LC, characterized in that each contact is held on the surface. The slider lever connector pulls the slider rearward through the tab with respect to the latch integrated lever, and the pin-shaped portion is pushed downward along the cam inclined surface portion provided on the slider to push the tip of the intermediate arm portion. The uniboot plug connector for LC according to claim 1, wherein the connector is curved downward to release the hook by the locking portion of the latch with respect to the locking groove formed in the adapter so that the connector can be pulled out. The slider lever connector has a tab from the reference position when the guide key protrusion provided on the lower surface side of the slider abuts on the front end of the guide key groove provided on the upper surface side of the holder. When the slider is pulled backward through, the pin-shaped portion of the latch integrated lever hits the cam inclined surface portion provided on the slider, and the intermediate arm portion moves downward so that the pin-shaped portion is pushed downward along the cam inclined surface portion. The LC uniboot plug connector according to claim 1, wherein the connector is deformed. In the slider lever connector, when the slider slides backward from the reference position, the protrusion-shaped groove-shaped portion provided on the lower surface side of the slider engages with the groove-shaped portion provided on the upper surface side of the holder. The LC uniboot plug connector according to claim 3, wherein the connector is formed in such a manner. The boot is attached to the holder via a caulking holder and a heat-shrinkable tube provided with a caulking ring, the holder is rotatable around the caulking holder, and each preasse is attached to the holder by its own shaft tube portion. The LC uniboot plug connector according to claim 1 to 4, wherein each of them is held and rotatable. Each preasse has a circular flange portion that is rotatably locked to the holder at the end of each shaft cylinder portion, and each preasse has a locking projection on the peripheral surface of the circular flange portion. The LC uniboot plug connector according to claim 5, wherein a stopper surface is provided opposite to the holder so that the locking projection is locked at a normal position at an angle of 0 ° and an inverted position at an angle of 180 °. ..

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