JP2015200771A - LC type optical connector plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LC type connector plug capable of easily inserting/extracting, especially, inserting an optical plug on a cord side behind a position of a slider for release lever operation in an optical connector adapter small in size and high in density mounting.SOLUTION: An LC type connector plug includes a tab 17 for operation detachably mounted to a slider 13 so that the slider 13 enables push-pull operation on the side of a rear code K. The tab 17 for operation comprises: an engagement piece 24 including a set hole 18 and detachably mounted to an engaging projection 33 formed in the upper center of a rear portion of the slider 13 so that the slider 13 can be inserted/extracted; and a pressing part 23 for contacting to abutting parts 34a and 34b formed in a symmetrical part of the rear portion of the slider 13 to press the slider 13. Contact surfaces of the pressing part 23 with the abutting parts 34a and 34b are formed on a flat surface perpendicular to each other.

Description

  The present invention relates to an LC-type optical connector plug with a release lever used when connecting an optical fiber. The push-pull method using an operating tab for operating a slider for operating the release lever moves the adapter. The present invention relates to an LC type optical connector plug with improved mounting and removal operability.

  Conventionally, this type of LC optical connector plug is integrally provided with a latch for engaging with and releasing from an adapter on the outer peripheral surface of the plug housing. The latch is inclined and extended so as to gradually move away from the outer surface of the plug housing from the front end portion to the rear end portion of the plug housing. When this LC type optical connector plug is attached to the adapter, a latch slightly protrudes from the rear end of the adapter. When the LC type optical connector plug is removed from the adapter, the latch is directly pushed down with the fingertip to release the engagement.

  In recent years, as shown in Patent Document 1, which is a prior application by the present applicant, high-density mounting of an optical connector is required. Therefore, on the extender cap side, a slider is engaged with a rear end portion of a latch, and an adapter A small LC-type optical connector plug has been proposed in which the latch is pushed down via this slider to release the engagement with the adapter when being removed from the adapter.

  That is, in the optical connector plug shown in Patent Document 1, a release lever having a locking piece at the approximate center for engaging with the adapter and a release piece at the rear end is provided on the upper surface in the longitudinal direction of the plug body. Restricted in the axial direction of the plug body by both stoppers, which are formed from the front to the rear, one stopper provided on the front side on both sides of the plug body and the other stopper provided at a predetermined interval on the rear side A slider is mounted so as to be movable within the range.

  And this slider has a tapered surface that engages with the release piece of the release lever so that it can be pressed, and at least one of the upper and lower sides of the rear end of the slider is provided with a convex operation part for gripping during operation, The operation part is equipped with a set hole at the tip of a thin tab for pulling operation that allows the slider to be operated on the rear cord side. By simply operating the pulling operation tab with a fingertip, the slider can be moved backward. It is configured so that it can move smoothly.

  In the optical connector plug shown in Patent Document 1, due to the configuration described above, the release lever is displaced downward by the guide of the adapter together with the locking piece when the plug body is attached to the adapter, and the locking piece and the adapter are engaged. To do. Then, when the slider is removed from the adapter, the release lever of the release lever is pushed down on the taper surface of the slider by moving the slider in the removal direction via the pull-out operation tab attached to the slider, and the locking piece and After the engagement of the adapter is released, the movement is restricted by the other stopper provided on the rear side of the plug body, and at the same time the slider is pulled out of the adapter, the plug body and the release lever are It shall return to the initial position.

Japanese Patent No. 5154985

  However, in the case of Patent Document 1 described above, the slider is moved in the removal direction by pulling out the pull-out operation tab, the release piece of the release lever is pushed down by the taper surface of the slider, and the engagement between the locking piece and the adapter is performed. The plug body can be removed from the adapter by releasing it. However, when the plug body is attached to the adapter, the inner edge of the set-up hole of the extraction tab when the pull-out operation tab made of a thin plate is pushed in. Thus, it is difficult to smoothly and surely insert the entire optical connector plug into the adapter because only the convex operating portion at the rear end of the slider is pressed.

  For this reason, the operating part at the rear end of the slider must be directly gripped by hand and attached to the adapter.However, when the plug alone is held in your hand, your fingers hit the boots and cables, etc. There is a problem that the operability at the time of mounting the optical connector plug by the small and high-density mounting is remarkably lowered.

  Therefore, the present invention has been devised in view of the conventional circumstances as described above, and in the optical connector adapter with small and high-density mounting, the cord side behind the slider position for operating the release lever It is an object of the present invention to provide an LC-type optical connector plug that can be easily attached and detached, particularly a push-in operation at the time of attachment.

  In order to solve the above-described problems, in the present invention, a release lever formed on the upper surface in the longitudinal direction of the plug main body from the front to the rear and detachably engaged with the adapter, and both side surfaces of the plug main body The plug is movably mounted in the axial restriction range of the plug body by one stopper provided at the front side and the other stopper provided at a predetermined interval on the rear side, and the release lever is released at the front part. And a slider having a tapered surface that is pressably engaged with the piece, and an engagement protrusion is provided at the center of the upper portion of the rear portion of the slider, and an abutting portion is provided at the left and right positions of the slider rear portion. Operation tabs each provided with an engagement piece having a set hole at the tip that is detachably attached to the engagement protrusion at the center of the rear portion of the slider, and a pressing portion that abuts against the abutting portions on both sides of the slider rear portion. It is characterized by comprising comprises.

  The abutting portions protruding at the left and right positions of the rear portion of the slider are each formed on a flat surface with a vertical end surface.

  The pressing portion provided in the front portion of the operation tab is formed on a vertical flat surface so that the front end thereof is in contact with the front end of the abutting portion of the slider rear portion in a vertical contact state. .

  According to the present invention, in an optical connector adapter with a small and high-density mounting, an optical plug can be easily inserted and removed, particularly an insertion operation, by an operation on the cord side behind the position of the release lever operating slider. It becomes.

  That is, in the present invention, a release lever formed on the upper surface in the longitudinal direction of the plug body from the front to the rear and detachably engaged with the adapter, one stopper provided on the front side on both sides of the plug body, and the rear A tapered surface that is movably mounted in the axial restriction range of the plug body by both stoppers provided at a predetermined interval on the side, and engages with the release piece of the release lever so that it can be pressed. Each of which has an engaging projection at the center of the upper portion of the rear portion of the slider, and abutment portion at the left and right positions of the rear portion of the slider. Since it is provided with an operating tab provided with an engaging piece having a set hole to be detachably mounted at the tip and a pressing portion that comes into contact with the abutting portions on both sides of the slider rear portion from the rear. Movement in the tab just push-pull operation to the longitudinal direction of the slider is assumed that performed smoothly, depression and release operation of the release lever through the slider easily. Therefore, the operability of the LC type optical connector plug by small and high density mounting is remarkably improved. Further, the operation tab can be easily attached to or detached from the engagement protrusion of the slider by the set hole of the engagement piece provided at the distal end of the operation tab.

  In addition, since the abutting surface provided at the left and right positions of the rear portion of the slider and the pressing portion of the operation tab are formed on each vertical flat surface, when mounting the optical plug with the operation tab, both Since the contact surfaces are in close contact with each other in a vertical state, the slider can be moved forward in a smooth manner, and the operability when the optical plug is mounted is greatly improved as compared with the conventional product.

It is a disassembled perspective view of the LC type optical connector plug which shows one form for implementing this invention. It is a perspective view of the LC type optical connector plug similarly assembled. It is a perspective view which shows an example of the operation tab by a push pull system. The detailed shape of the tab for operation is similarly shown, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, and (e) is a rear view. An example of an operation procedure for attaching and removing an LC type optical connector plug to and from an adapter via an operation tab will be described. (A) to (c) in FIG. It is explanatory drawing which showed this procedure with sectional drawing. (D) thru | or (f) is explanatory drawing which showed the procedure of removal of the LC type optical connector plug with respect to an adapter with sectional drawing.

  The best mode for carrying out the LC type optical connector plug according to the present invention will be described below in detail with reference to the drawings.

  As shown in FIG. 1, an LC type optical connector plug 1 (hereinafter abbreviated as a plug body 1) according to the present invention includes a rectangular tube-shaped coupling sleeve 2 made of a relatively high strength plastic, and this coupling. A ferrule 5 integral with the ferrule tube 3 and the ferrule frame 4 in the sleeve 2, a spring 6 attached to the outer periphery of the rear end portion of the ferrule frame 4, and the rear end portion side of the ferrule frame 4 through the spring 6 And a plastic extender cap 7 to be fitted.

  When assembling the plug body 1, as shown in FIG. 1, the ferrule 5, the spring 6, and the extender cap 7 are sequentially inserted into the coupling sleeve 2, and the locking claw of the extender cap 7 is connected to the coupling sleeve 2. The extender cap 7 is fixed to the coupling sleeve 2 by being engaged with the locking holes, and the ferrule 5 is urged and held in the coupling sleeve 2 via the spring 6 in the axial direction. Further, behind the extender cap 7, a heat shrinkable tube 9 provided with a caulking ring 8 for protecting the optical fiber and preventing disconnection due to deformation, and the distal end side of the cord K (see FIG. 5). And a boot 10 for connecting to the boot.

  Moreover, as shown in FIG. 1, the outer peripheral surface of the coupling sleeve 2 is provided with a locking piece 12 at the approximate center of both side surfaces in the width direction for engaging with and releasing from the adapter P, and A release lever 11 provided with a pair of release pieces 11 a projecting laterally with respect to the axial direction at a symmetrical position of the end is integrally provided on the coupling sleeve 2. Note that a guide (not shown) having a step toward the inside is formed in the plug insertion hole of the adapter P, and the locking piece 12 is engaged with the step of the guide, whereby the plug body 1 (Locking piece 12) and adapter P can be engaged.

  The release lever 11 is inclined and extended on one surface in the longitudinal direction of the coupling sleeve 2 of the plug body 1 so as to gradually move away from the outer surface of the coupling sleeve 2 from the front end portion toward the rear end portion. The pair of left and right release pieces 11a at the rear end portion is in a complementary relationship with the tapered surface 13a so as to abut on the tapered surface 13a at the left / right symmetrical position inside the opening 13b of the slider 13 as will be described later. Yes.

  Also, a rectangular tube housing-like slider 13 is mounted on the outer peripheral surface of the extender cap 7, and as shown in FIGS. 1 and 2, a stopper 14a provided on the front side on both sides of the extender cap 7 and a predetermined side on the rear side. The movement of the slider 13 in the axial direction is restricted by a stopper 14b provided at an interval.

  As shown in FIGS. 1, 2, 5 (a) to 5 (f), the slider 13 is formed in a rectangular tube housing shape on a pair of left and right guide rails 31 provided in the longitudinal direction on the upper surface of the extender cap 7. A pair of left and right guide recesses 32 formed on the upper wall surface in the square hole 15 of the slider 13 is engaged and can slide between the stopper 14a and the stopper 14b. Yes.

  Further, the front end side of the upper surface of the slider 13 protrudes slightly forward, and the protruding inside forms a space on the upper side of the extender cap 7 so that the release lever 11 can be displaced in a direction substantially perpendicular to the axial direction. A substantially U-shaped arch-shaped opening 13b is penetrated in the front-rear direction, and a symmetrical part inside the opening 13b is a tapered surface 13a inclined toward the end of the extender cap 7. A pair of left and right release pieces 11a at the inclined rear end of the release lever 11 is engaged with the tapered surface 13a (see FIG. 5).

  As shown in FIGS. 1, 2, and 5, the rear end side of the upper surface of the slider 13, that is, the rear center of the opening 13b, is cut out in a slightly concave shape toward the front. In other words, the engaging projection 33 is exposed in a state of protruding upward in the center of the rear portion of the slider 13. Further, the left and right symmetrical portions on the rear end side of the upper surface of the slider 13 are provided with abutting portions 34a and 34b projecting rearward through the step portions 35a and 35b.

  On the other hand, a long block-like operation tab 17 can be attached to the slider 13 so that the slider 13 can be pushed and pulled on the rear cord K side, and the operation tab 17 is moved in the front-rear direction. Thus, the slider 13 moves in the front-rear direction in conjunction with each other.

  That is, as shown in FIGS. 1, 2, 3, and 4, the rear end of the operation tab 17 in the longitudinal direction has a knurled eye on the side surface so that it can be operated by hand. An ellipse-shaped gripping portion 21 is provided, and the operation tab 17 is wide enough to be able to simultaneously contact the front ends of the pair of left and right abutting portions 34a and 34b of the slider 13 at the front portion in the longitudinal direction. The pressing portion 23 is formed. As shown in FIGS. 3 and 4D, the pressing portion 23 is formed in a substantially downward U-shape when viewed from the front, and the lower surface of the operation tab 17 is a front surface so as to substantially correspond to the outer shape of the boot 10. It is recessed in a substantially arc shape when viewed.

  The abutting portions 34a and 34b projecting from the left and right positions of the rear portion of the slider 13 are each formed on a flat surface having a vertical tip. On the other hand, the front end of the pressing portion 23 provided at the front portion of the operation tab 17 is also formed on a vertical flat surface so as to come into contact with the front ends of the abutting portions 34a and 34b in a vertical contact state.

  In addition, a set hole 18 is formed at the front end of the pressing portion 23 at the center for engaging with an engaging protrusion 33 located on the intermediate upper surface of each of the pair of left and right abutting portions 34a and 34b of the slider 13. The narrow and thin strip-like engagement piece 24 is provided. A slit portion 20 is formed from the set hole 18 to the pressing portion 23. The lateral width of the engaging piece 24 substantially corresponds to the interval width between the pair of left and right abutting portion protrusions 34a and 34b.

  Thus, the grip portion 21 side of the operation tab 17 is arranged on the code K side behind the slider 13, and the holding portion 23 of the operation tab 17 is pushed by holding the grip portion 21 by hand. The front end presses against the abutting portions 34a and 34b at the rear end of the slider 13 to move the slider 13 forward to a position where it is locked by the front stopper 14a, while holding the gripping portion 21 by hand. As a result, the engaging piece 24 pulls the engaging protrusion 33 of the slider 13 and moves the slider 13 backward to a position where it is locked by the stopper 14a on the rear side.

  Next, an example of use of the best mode of the present invention configured as described above will be described in detail.

  First, the set hole 18 of the engagement piece 24 of the operation tab 17 is attached to the engagement protrusion 33 provided at the center of the upper surface of the rear end of the slider 13. At this time, the pressing portion 23 provided at the front portion of the operation tab 17 is brought into contact with the pair of left and right abutting portions 34 a and 34 b protruding from the rear end of the slider 13.

  When the plug body 1 is attached to the adapter P, as shown in FIGS. 5A to 5C, the gripping portion 21 of the operation tab 17 is held by the fingertip and pushed in the adapter P attachment direction. At this time, the movement of the slider 13 is restricted by the stopper 14a, and the plug body 1 moves into the adapter P. At the same time, the release lever 11 is pressed together with the locking piece 12 by the guide of the plug insertion hole of the adapter P, and is mounted while being displaced downward together with the locking piece 12. Then, the tip of the ferrule 5 of the plug body 1 is fitted to the sleeve holder H of the adapter P, and at the same time, the locking piece 12 is elastically locked to the step formed on the back side of the guide of the adapter P upward. Thus, the plug body 1 (the locking piece 12) and the adapter P are engaged.

  Thus, a pressing portion 23 is provided at the front portion of the operation tab 17, and a pair of left and right abutting portions 34 a and 34 b are provided at the rear end of the slider 13. Since the contact surfaces of the portions 34a and 34b are each formed into a vertical flat surface so as to be in close contact with each other in a vertical state, the pushing movement of the slider 13 by the operation tab 17 can be performed smoothly.

  On the other hand, when the plug body 1 is pulled out from the adapter P, as shown in FIGS. 5D to 5F, the gripping portion 21 of the operation tab 17 is held by the fingertip and pulled out from the adapter P in the pulling direction. Thus, the slider 13 is moved in the same removal direction in conjunction with each other. At this time, the release piece 11 a at the rear end of the release lever 11 is pushed down by the tapered surface 13 a of the slider 13, whereby the engagement between the locking piece 12 and the adapter P is released, and the plug body 1 is removed from the adapter P. It can be removed (see FIGS. 5D and 5E). Further, when the slider 13 is moved in the removal direction, the movement is restricted by the rear stopper 14b. At the same time as the slider 13 is removed from the adapter P, the plug body 1 and the release lever 11 are initially moved by the elastic force of the release lever 11. Return to the position (see FIG. 5F).

P Adapter K Cord H Sleeve holder 1 Plug body 2 Coupling sleeve 3 Ferrule tube 4 Ferrule frame 5 Ferrule 6 Spring 7 Extender cap 8 Caulking ring 9 Heat shrinkable tube 10 Boot 11 Release lever 11a Release piece 12 Locking piece 13 Slider 13a Tapered surface 13b Opening portion 14a Front stopper 14b Rear stopper 15 Square hole 17 Operation tab 18 Set hole 20 Slit portion 21 Grip portion 23 Pushing portion 24 Engagement piece 31 Guide rail 32 Guide recess 33 Engagement protrusion 34a, 34b Butting part 35a, 35b Step part

Claims (3)

  A release lever that is formed on the upper surface in the longitudinal direction of the plug body from the front to the rear and detachably engages with the adapter, one stopper provided on the front side on both sides of the plug body, and a predetermined interval on the rear side. A slider provided with a tapered surface that is movably mounted in the axial restriction range of the plug main body by both stoppers of the other stopper provided and is engaged with the release piece of the release lever so that it can be pressed. A set that is provided with an engaging protrusion at the upper center of the rear part of the slider and abutment parts at the left and right positions of the rear part of the slider, and is detachably attached to the engaging protrusion at the center of the rear part of the slider. An LC-type optical connector plug comprising an engagement piece having a hole at the tip and an operation tab each provided with a pressing portion that abuts against the abutting portions on both sides of the slider rear portion. Grayed.   2. The LC type optical connector plug according to claim 1, wherein the abutting portions protruding at the left and right positions of the rear portion of the slider are each formed on a flat surface having a vertical end surface.   The pressing portion provided in the front portion of the operation tab is formed on a vertical flat surface so that the front end thereof is in contact with the front end of the abutting portion of the slider rear portion in a vertical contact state. The LC type optical connector plug according to claim 1 or 2.

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