JP6978907B2 - Optical adapter cap and its manufacturing equipment - Google Patents

Description

The present invention has a dustproof function to prevent dust from entering through the opening of the optical adapter when the optical connector plug is not inserted and connected to the optical adapter (when the optical adapter is not used, etc.) and a locking portion in the optical adapter. The present invention relates to a cap for an optical adapter having a protective function to prevent damage or deformation from the outside against such factors, and a manufacturing apparatus thereof.

Conventionally, as shown in FIGS. 25 to 27 and 35 to 37, the optical adapter 20 has been provided at both ends of the optical adapter 20 so that the optical fiber tape core wire of the ferrule of the MPO type connector plug can be interconnected. , One insertion opening end and the other insertion opening end are provided so that the optical axes are aligned, and an inserted MPO type connector plug is engaged inside both insertion opening ends. Flexible latch lever pieces 21 having hook-shaped claws 21a formed at the tips thereof inwardly are arranged to face each other for stopping.

Therefore, when the optical connector plug (not shown) is inserted and connected to the optical adapter 20 (when the optical adapter 20 is not used, etc.), dust and the like are prevented from entering through the opening end of the optical adapter 20. The optical adapter cap K is attached in order to prevent external damage and deformation of the dustproof function and the locking portion in the optical adapter 20.

Specifically, as shown in FIGS. 18 to 27, the optical adapter cap K includes a substantially rectangular cylinder body 1 inserted into one insertion opening end of the optical adapter 20 and the optical adapter 20. A horizontally long substantially circular plate-shaped flange portion 2 connected to one end of the cylinder body 1 so as to be locked to the opening edge of one of the insertion opening ends, and a knob connected to the outer surface of the flange portion 2. It has a part 3.

As shown in FIGS. 18, 19, 21, 23, and 25 to 27, a groove 1a is formed along the longitudinal direction on the left and right outer wall surfaces of the cylinder body 1 and is connected to the groove 1a. A missing portion 50 is formed at a symmetrical position of the flange portion 2 to be formed, which is notched in a substantially U-shaped concave shape in the front view. Then, in the groove portion 1a on the side closer to the missing portion 50, a hook portion 5 for engaging the hook-shaped claw portion 21a formed inward toward the tip of the latch lever piece 21 is integrally formed. ing. The hooking portion 5 has a shape in a substantially cross-sectional shape due to a steep rear inclined surface 5a formed toward the missing portion 50 side and a gentle front inclined surface 5b formed toward the tip end side of the cylinder body portion 1. It is formed in the form of an outward bulge.

As shown in FIGS. 25 to 27, when the cap K is inserted into one of the insertion opening ends of the optical adapter 20, the hook portion 5 formed in the groove portion 1a has a claw portion of the latch lever piece 21. 21a is hung. At this time, the claw portion 21a is fitted and held in the missing portion 50 provided in the flange portion 2.

Further, as another example of the conventional cap K for an optical adapter, as shown in FIGS. 28, 31, and 33, the hook portion 5 is not formed in the groove portion 1a but is formed in a straight groove. At the same time, in some cases, a recess 40 recessed in a substantially rectangular shape in front view is formed at a symmetrical position of the flange portion 2 connected to the groove portion 1a.

Similarly to the above, the cap K of this example also has a flange portion 2 formed at one end of the cylinder body portion 1 so as to be locked to the opening edge of the optical adapter 20, and a knob portion 3 is provided on the outer surface of the flange portion 2. ing. Further, as shown in FIGS. 35 to 37, an outward tapered surface portion 40a is formed on the outer inner wall of the recess 40.

Then, when the cap K is inserted into one of the insertion opening ends of the optical adapter 20, the claw portion 21a of the latch lever piece 21 slides straight along the groove portion 1a and fits into the recess 40. Locked.

In the first (see paragraph numbers "0004" to "0006") and second (see paragraph numbers "0007" to "0009") caps K described above, reference numeral 10 is a wide flange portion 2. It is a rectangular plate-shaped base portion (base portion of the knob portion 3).

nothing special

However, since the outer wall of the flange portion 2 of the missing portion 50, which is mentioned as the structural example of the first cap K in the prior art, is open as a notch, the latch lever piece 21 of the optical adapter 20 is opened. Since the claw portion 21a of the light adapter 20 is exposed, even if one of the insertion opening ends of the optical adapter 20 is closed with the cap K, it does not have a dustproof function and can be easily entered into the optical adapter 20 from the outside. There is a defect that dust etc. invade.

Further, the recess 40 recessed in a substantially rectangular shape in front view, which is mentioned as a structural example of the second cap K in the conventional case, has a dustproof function, contrary to the case of the missing portion 50. However, since the hooking portion 5 for engaging the claw portion 21a of the latch lever piece 21 of the optical adapter 20 is not formed, one insertion opening end of the optical adapter 20 is closed with a cap K. However, there is a defect that it is easy to pull out.

On the other hand, in the apparatus for manufacturing the cap K for the optical adapter, the concave portion 40 and the like of the cap K are molded using a mold for injection molding that can be separated from each other, but the claw portion 21a of the latch lever piece 21 is engaged. When forming the hooking portion 5 in the groove portion 1a, it is necessary to slide the pair of left and right molds diagonally downward instead of directly below to separate them in order to avoid collision with the hooking portion 5. be. However, since the concave portion 40 of the cap K is formed by being recessed in a substantially rectangular shape in front view, there is no means other than separating the left and right molds directly downward, and therefore the outer wall of the concave portion 40 is made of gold. There is a risk of breakage due to pressing pressure from the inside of the mold.

Therefore, the cap K composed of the flange portion 2 provided with the conventional substantially rectangular concave portion 40 in front view and the cylinder body portion 1 provided with the hooking portion 5 of the latch lever piece 21 is formed by using a separation mold. However, it is almost impossible to separate (pull out) the mold after molding, and in that respect, improvement as a manufacturing apparatus for the cap K is required.

Therefore, the present invention has been devised in view of the above-mentioned conventional circumstances, and even if the optical adapter has a latch lever piece, the cap can be smoothly "pulled out" and at the same time, it is dustproof. It is an object of the present invention to provide a cap for an optical adapter and a manufacturing apparatus thereof, which have excellent functions and can be easily manufactured by a separation mold (improvement of the mold removal function).

In order to solve the above-mentioned problems, the optical adapter cap according to the present invention is an optical adapter cap integrally molded by injection molding using a mold.
A cylinder body inserted into the optical adapter, a flange portion connected to one end of the cylinder body so as to be locked to the opening edge of the optical adapter, and a knob portion connected to the outer surface of the flange portion. And, at symmetrical positions in the connection portion between the cylinder body portion and the flange portion, the tips of the flexible latch lever pieces for locking the optical connector plugs formed opposite to each other inside the optical adapter are fitted and inserted. A recess is formed, and a hook portion for engaging a flange-shaped claw portion formed inward with each other is formed at the tip of the latch lever piece at a symmetrical position on the outer wall of the cylinder body portion. The outer inner wall of the recess is characterized in that an outward tapered surface portion is formed so as to face the hook portion.

The latch lever piece is characterized in that the claw portion at the tip of the latch lever piece can be detached by sliding in an oblique direction along the outer inner wall of the outward tapered surface portion of the recess.

The width of the inner bottom of the recess in the thickness direction corresponds to the thickness of the latch lever piece of the optical adapter.

The width of the recess corresponds to the width of the latch lever piece of the optical adapter.

The hook portion has a shape of an outward bulge in a substantially shape in cross section due to a steep rear inclined surface facing the outward tapered surface portion of the recess and a gently inclined front inclined surface formed toward the tip end side of the cylinder body portion. It is characterized by being formed as.

The knob portion is characterized in that it is formed in any shape of a trumpet shape, a skirt shape, a nozzle shape, a conical shape, or a rectangular tubular frame shape from the flange portion toward the outside.

On the other hand, in the device for manufacturing an optical adapter cap according to the present invention, the cylinder body inserted into the optical adapter and one end of the cylinder body so as to be locked to the opening edge of the optical adapter are continuously provided. A device for manufacturing an optical adapter cap using a mold for injection molding for molding a flange portion and a knob portion connected to the outer surface of the flange portion. The mold is the above-mentioned mold. A pair of left and right knobs / flange portions that can be separated from each other, such as an inner mold that forms the inside of the cylinder body, an inner mold that forms the inside of the knob portion, and a mold that forms the outside of these knob portions and the flange portion. An outer mold and a pair of left and right cylinder body outer molds that can be separated from each other to form the outside of the cylinder body portion are provided, and the cylinder body portion and the flange portion are connected to the tip of the cylinder body portion outer mold. At symmetrical positions in the portion, a protruding mold is formed so as to form a recess for inserting each tip of a flexible latch lever piece for locking an optical connector plug formed to face the inside of the optical adapter. On the inside of the outer die of the cylinder, a hook portion is formed at a symmetrical position on the outer wall of the cylinder to engage a hook-shaped claw portion formed inward toward the tip of the latch lever piece. The outer wall side of the protruding mold is provided with a curved recess so as to be formed, and an inwardly tapered surface portion is formed toward the tip corresponding to the curved recess.

The protruding mold is characterized in that it is formed at a symmetrical position at the tip of the outer die of the cylinder body portion so as to correspond to a latch lever piece formed so as to face the inside of the optical adapter.

According to the present invention, the optical adapter is excellent in dustproof and protective functions, and can be easily and reliably manufactured by a separation mold for injection molding (improvement of the "pull-out" function of the mold).

That is, the optical adapter cap according to the present invention is an optical adapter cap integrally molded by injection molding using a mold.
A cylinder body inserted into the optical adapter, a flange portion connected to one end of the cylinder body so as to be locked to the opening edge of the optical adapter, and a knob portion connected to the outer surface of the flange portion. And, at symmetrical positions in the connection portion between the cylinder body portion and the flange portion, the tips of the flexible latch lever pieces for locking the optical connector plugs formed opposite to each other inside the optical adapter are fitted and inserted. A recess is formed, and a hook portion for engaging a hook-shaped claw portion formed inward with respect to the tip of the latch lever piece is formed at a symmetrical position on the outer wall of the cylinder body portion. Since the outer inner wall of the recess is formed with an outward tapered surface portion facing the hook portion, the cap can be smoothly separated and "pulled out" from the optical adapter, and at the same time, it has a dustproof function. It will be an excellent cap. Moreover, when the lid is closed by the cap of the optical adapter, the claw portion at the tip of the latch lever piece is inserted into the recess and is not exposed, so that the latch lever piece can be prevented from being deformed or damaged.

The latch lever piece is characterized in that the claw portion at the tip of the latch lever piece can be detached by sliding in an oblique direction along the outer inner wall of the outward tapered surface portion of the recess. The separation "pull-out" operation of the cap can be performed smoothly without damaging the outer wall of the recess. Therefore, at the time of cap molding using such a separation mold, the mold can be easily and surely separated without the outer wall of the recess being broken by the pressing force from the inside of the mold.

Since the width of the inner bottom of the recess in the thickness direction corresponds to the thickness of the latch lever piece of the optical adapter, the width of the recess of the optical adapter and the latch lever piece in the thickness direction Since there are no gaps, the cap has an excellent dustproof function.

Since the width of the recess corresponds to the width of the latch lever piece of the optical adapter, there is no gap in the width direction between the recess and the latch lever piece, so that the dustproof function is excellent. It becomes a cap.

The hook portion has a shape of an outward bulge in a substantially shape in cross section due to a steep rear inclined surface facing the outward tapered surface portion of the recess and a gently inclined front inclined surface formed toward the tip end side of the cylinder body portion. Since it is characterized in that it is formed in such a manner, the structure is difficult to pull out because the claw portion at the tip of the latch lever piece is caught by the hooked portion. Incidentally, for example, if the structure is stopped in the optical adapter by the repulsive force of the resin spring, the holding force of the cap is weakened by the deformation due to heat, but the structure of the present invention is less susceptible to the influence of the environment.

The knob is characterized in that it is formed in any shape of a trumpet, a skirt, a nozzle, a cone, or a rectangular tubular frame from the flange to the outside. The cap can be easily pulled out from the optical adapter.

On the other hand, in the device for manufacturing an optical adapter cap according to the present invention, the cylinder body inserted into the optical adapter and one end of the cylinder body so as to be locked to the opening edge of the optical adapter are continuously provided. A device for manufacturing an optical adapter cap using a mold for injection molding for molding a flange portion and a knob portion connected to the outer surface of the flange portion, wherein the mold is the same. A pair of left and right grips / flange portions that can be separated from each other, such as an inner mold that forms the inside of the cylinder body, an inner mold that forms the inside of the knob, and a mold that forms the outside of these knobs and flanges. It is provided with an outer mold and a pair of left and right cylinder body outer molds that can be separated from each other to form the outside of the cylinder body, and the tip of the cylinder body outer mold is connected to the cylinder body and the flange portion. At symmetrical positions in the portion, a protruding mold is formed so as to form a concave portion for inserting the tip of each flexible latch lever piece for locking the optical connector plug formed to face the inside of the optical adapter. On the inside of the outer die of the cylinder, a hook portion is formed at a symmetrical position on the outer wall of the cylinder to engage a hook-shaped claw portion formed inward toward the tip of the latch lever piece. The outer wall side of the protruding mold is provided with a curved concave portion so as to be formed, and an inwardly tapered surface portion is formed toward the tip corresponding to the curved concave portion. When separating the pair of left and right cylinder outer molds after being cooled and solidified in the mold, by sliding the pair of left and right cylinder outer molds diagonally downward along the inwardly tapered surface portion, after molding. The mold can be easily and reliably separated and "pulled out" without breaking the cap.

The protruding mold is characterized in that it is formed at a symmetrical position of the tip of the outer die of the cylinder body portion so as to correspond to the latch lever piece formed to face the inside of the optical adapter. When it is attached to the open end of the optical connector, it can be inserted without difficulty without the claws of the latch lever piece interfering with each other.

It is a perspective view of the cap for an optical adapter which shows one embodiment for carrying out this invention. It is also a side view. It is also a plan view. It is also a front view. It is also a rear view. FIG. 4 is a cross-sectional view taken along the line AA of FIG. FIG. 5 is a cross-sectional view taken along the line BB of FIG. It is a cross-sectional view (when the lid is opened) before inserting the cap into the adapter. Similarly, it is a cross-sectional view in the middle of insertion. Similarly, it is a cross-sectional view after insertion (when the lid is closed). It is a plan sectional view at the time of molding of the cap for an optical adapter by a mold. It is a plan sectional view at the time of mold release. It is a perspective view which shows the modification when the shape of the knob of this invention is different. It is also a side view. It is also a plan view. It is also a front view. It is also a rear view. It is a perspective view of the cap for an optical adapter in the conventional example. It is also a side view. It is also a plan view. It is also a front view. It is also a rear view. FIG. 21 is a sectional view taken along the line CC of FIG. FIG. 22 is a cross-sectional view taken along the line DD of FIG. It is a cross-sectional view (when the lid is opened) before inserting the cap into the optical adapter. Similarly, it is a cross-sectional view in the middle of insertion. Similarly, it is a cross-sectional view after insertion (when the lid is closed). It is a perspective view which shows the other conventional example. It is also a side view. It is also a plan view. It is also a front view. It is also a rear view. FIG. 31 is a cross-sectional view taken along the line EE of FIG. FIG. 32 is a cross-sectional view taken along the line FF of FIG. 32. It is sectional drawing (at the time of opening) before inserting the cap of the conventional example into an optical adapter. Similarly, it is a cross-sectional view in the middle of insertion. Similarly, it is a cross-sectional view after insertion (when the lid is closed).

Hereinafter, an embodiment of the optical adapter cap K (hereinafter abbreviated as cap K) according to the present invention will be described in detail with reference to the drawings.

The cap K in the present embodiment is integrally molded by, for example, injecting, for example, a thermoplastic (resin) into a closed mold for injection molding described later (see FIGS. 11 and 12 described later). As shown in FIGS. 1 to 7, a substantially rectangular cylinder body 1 inserted into the rectangular opening end of the optical adapter 20 and one end of the cylinder body 1 so as to be locked to the opening edge of the optical adapter 20. A flange portion 2 having a substantially horizontally elongated circular plate shape, and a knob portion 3 having a trumpet-shaped, skirt-shaped, nozzle-shaped, or conical shape connected to the outer surface of the flange portion 2. It is equipped with.

In the figure, reference numeral 10 is a wide rectangular plate-shaped base portion (base portion of the knob portion 3) of the flange portion 2 of the cap K, which substantially corresponds to the outer shape of the optical adapter 20. Further, in the figure, reference numeral 11 is a pair of front and rear guide protrusions projecting along the width direction on both the upper and lower sides of the cylinder body 1 of the cap K, with respect to the inner wall of the optical adapter 20 of the cylinder body 1. The contact area is reduced to reduce sliding friction, and when the cap K is closed, the holding function of the cylinder body 1 with respect to the optical adapter 20 without rattling is maintained.

As shown in FIGS. 1, 4, and 6, a groove portion 1a is formed along the longitudinal direction on the left and right outer wall surfaces of the cylinder body portion 1 of the cap K, and the front surface of the flange portion 2 connected to the groove portion 1a. Recesses 4 formed in a substantially U-shape in the front view are formed at symmetrical positions. The recess 4 is a flexible latch for locking the optical connector plug formed to face the inside of the optical adapter 20 when the lid is closed by the cap K to the insertion opening end side of the optical connector plug of the optical adapter 20. The tip of the lever piece 21 (the hook-shaped claw portion 21a described later) is fitted and inserted (see FIGS. 8 to 10).

Further, as shown in FIGS. 1, 3, 4, 6, and 8 to 10, the groove portion 1a on the side closer to the recess 4 is formed at the tip of the latch lever piece 21 toward the inside of each other. A hooking portion 5 for engaging the hook-shaped claw portion 21a described above is integrally formed. The hooking portion 5 has a shape having a substantially rectangular cross section due to a steep rear inclined surface 5a formed toward the concave portion 4 side and a gentle front inclined surface 5b formed toward the tip end side of the cylinder body 1. It is formed in the form of an outward bulge.

Further, as shown in FIGS. 6 and 8 to 10, the outer inner wall of the recess 4 is formed as an outward tapered surface portion 4a, and the surface thereof is a hook portion 5 formed in the groove portion 1a. It faces the rear inclined surface 5a. As a result, the latch lever piece 21 can be removed by sliding the claw portion 21a at the tip of the latch lever piece 21 diagonally outward along the outer inner wall of the outward tapered surface portion 4a of the recess 4.

The width of the inner bottom portion of the recess 4 in the thickness direction corresponds to the thickness of the latch lever piece 21 of the optical adapter 20, and the width of the recess 4 is the width of the latch lever piece 21 of the optical adapter 20. (See FIG. 10). As a result, when the lid is closed by the cap K to the insertion opening end side of the optical connector plug of the optical adapter 20, no gap is generated between the latch lever piece 21 and the flange portion 2, so that the optical adapter 20 A dustproof function is exhibited to prevent dust and the like from entering the inside.

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

As a specific configuration of the optical adapter 20 described above, as shown in FIGS. 8 to 10, at both ends of the optical adapter 20 so that the optical fiber tape core wire of the ferrule of the MPO type connector plug can be interconnected. One insertion opening end and the other insertion opening end are provided so that the optical axes are aligned, and the inserted MPO type connector plug is locked inside each of the two insertion opening ends. A flexible latch lever piece 21 having a hook-shaped claw portion 21a formed at the tip thereof inward is arranged so as to face each other.

As shown in FIG. 8, from the state before inserting the cap K into one of the opening ends for insertion of the optical adapter 20 (when the lid is opened), as shown in FIG. 9, the latch lever piece 21 is in the middle of inserting. Is that the claw portion 21a at the tip of the latch lever piece 21 slides along the outer wall of the cylinder body portion 1 of the cap K, and the hook portion 5 formed on the outside of the cylinder body portion 1 is gently inclined forward. The surface 5b rides on and is hung on the steep rear inclined surface 5a by the elastic force of the latch lever piece 21 itself, and at the same time, as shown in FIG. 10, the claw portion 21a of the latch lever piece 21 has an outward tapered surface portion 4a. By sliding diagonally inward along the outer inner wall of the light adapter 20, the light adapter 20 is fitted into the recess 4 and one open end of the optical adapter 20 is closed.

When the cap K is pulled out from one of the insertion opening ends of the optical adapter 20, when the cap K is forcibly pulled out, the claw portion 21a at the tip of the latch lever piece 21 of the optical adapter 20 is tapered outward in the recess 4. The cap K is easily removed by sliding diagonally outward along the outer inner wall of the surface portion 4a and at the same time, the claw portion 21a rides on the steep rear inclined surface 5a.

Next, the apparatus for manufacturing the cap K, which uses a mold for injection molding, will be described.

As shown in FIGS. 11 and 12, the mold is located on the cylinder body inner mold 13b that forms the inside of the cylinder body 1 located on the front side of the cap K, and on the rear side of the cap K. A pair of left and right grip / flange outer molds 12 that can be separated from each other to mold the inside of the grip 3 and the outside of the grip 3 and the flange 2 and the cylinder body of the cap K. It is provided with a pair of left and right cylinder body outer dies 14 that can be separated from each other to form the outside of the portion 1.

Further, a protruding mold 15 is integrally formed at the tip of the cylinder body outer mold 14 described above, and a curved recess 16 is provided inside the cylinder body outer mold 14.

First, as shown in FIG. 11, a predetermined gap is formed between a pair of upper and lower cylinder body inner dies 13b, a knob inner die 13a, a pair of left and right knob / flange outer dies 12, and a pair of left and right cylinder body outer dies 14. It is closed in a separated state, and the plastic (resin) heat-plasticized at high pressure is injected into the cavity of this closed mold. After the plastic (resin) is cooled and solidified in the mold, the mold is separated.

When these molds are separated, as shown in FIG. 12, the outer wall side of the protruding mold 15 is formed as an inwardly tapered surface portion 15a toward the tip corresponding to the curved recess 16. The pair of left and right cylinder body outer dies 14 can be easily removed by sliding them diagonally (in the direction of the arrow).

As a result, the flexible latch lever piece 21 for locking the optical connector plug formed to face the inside of the optical adapter 20 at a symmetrical position in the connection portion between the cylinder body portion 1 and the flange portion 2 of the cap K. A recess 4 into which the tip of the light is inserted is formed. At the same time, the inwardly tapered surface portion 15a of the protruding mold 15 forms an outwardly tapered surface portion 4a on the outer inner wall of the recess 4. Further, at symmetrical positions on the outer wall of the cylinder body 1 of the cap K, a hooking portion 5 for engaging a hook-shaped claw portion 21a formed inward toward the tip of the latch lever piece 21 is integrated. It is formed.

Next, a modified example in the case where the shape of the grip portion of the cap K in the present embodiment is different will be described. The same parts as those of the present embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted. That is, in this modification, as shown in FIGS. 13 to 17, the knob portion 30 of the cap K has a width toward the rear from the base portion 10 of the flange portion 2 at the rear end of the cylinder body portion 1 of the cap K. It is continuously provided via a rectangular connecting portion 30a having a small diameter, and is formed in a substantially rectangular tubular frame shape as a whole.

As described above, in the present embodiment and its modified examples, even if the optical adapter 20 has the latch lever piece 21, the cap K can be smoothly attached and detached, and at the same time, the dustproof function is excellent. Moreover, it can be easily and accurately manufactured by a separation mold for injection molding (improvement of the mold removal function).

K Cap 1 Cylinder body 1a Groove 2 Flange 3 Grip 4 Recess 4a Outward tapered surface 5 Hook 5a Rear inclined surface 5b Front inclined surface 10 Base 11 Guide protrusion 12 Grip / flange outer type 13a Knob inner type 13b Cylinder body inner mold 14 Cylinder body outer mold 15 Protruding mold 15a Inward tapered surface part 16 Curved recess 20 Optical adapter 21 Latch lever piece 21a Claw part 30 Hooking part 30a Rectangular connecting part 40a Outward tapered surface part 50 Missing part

Claims (8)

An optical adapter cap that is integrally molded by injection molding using a mold.
A cylinder body inserted into the optical adapter, a flange portion connected to one end of the cylinder body so as to be locked to the opening edge of the optical adapter, and a knob portion connected to the outer surface of the flange portion. And, at symmetrical positions in the connection portion between the cylinder body portion and the flange portion, the tips of the flexible latch lever pieces for locking the optical connector plugs formed opposite to each other inside the optical adapter are fitted and inserted. A recess is formed, and a hook portion for engaging a hook-shaped claw portion formed inward with respect to the tip of the latch lever piece is formed at a symmetrical position on the outer wall of the cylinder body portion. An optical adapter cap characterized in that an outward tapered surface portion is formed on the outer inner wall of the recess so as to face the hook portion. The light according to claim 1, wherein the latch lever piece can be removed by sliding the claw portion at the tip of the latch lever piece diagonally along the outer inner wall of the outward tapered surface portion of the recess. Adapter cap. The optical adapter cap according to claim 1 or 2, wherein the width of the inner bottom of the recess in the thickness direction corresponds to the thickness of the latch lever piece of the optical adapter. The optical adapter cap according to any one of claims 1 to 3, wherein the width of the recess corresponds to the width of the latch lever piece of the optical adapter. The hook portion has a shape of an outward bulge in a substantially shape in cross section due to a steep rear inclined surface facing the outward tapered surface portion of the recess and a gently inclined front inclined surface formed toward the tip end side of the cylinder body portion. The cap for an optical adapter according to claim 1, wherein the cap is formed as follows. Claim 1 is characterized in that the knob portion is formed in any shape of a trumpet shape, a skirt shape, a nozzle shape, a conical shape, or a rectangular tubular frame shape from the flange portion to the outside. The cap for the optical adapter described. A cylinder body inserted into the optical adapter, a flange portion connected to one end of the cylinder body so as to be locked to the opening edge of the optical adapter, and a knob portion connected to the outer surface of the flange portion. It is an apparatus for manufacturing an optical adapter cap using a mold for injection molding for molding, and the mold is a mold inside the cylinder for molding the inside of the cylinder and a knob of the knob. A pair of left and right knob / flange outer dies that can be separated from each other, and left and right that can be separated from each other to form the outside of the cylinder body. An optical connector is provided with a pair of cylinder outer molds, and the tip of the cylinder outer mold is formed to face the inside of the optical adapter at a symmetrical position at a connecting portion between the cylinder body and the flange portion. A protruding mold is formed so that a recess for inserting the tip of each flexible latch lever piece for locking the plug is formed, and the outer wall of the cylinder body is inside the outer mold of the cylinder body. A curved recess is provided so that a hook portion for engaging a hook-shaped claw portion formed inward with respect to the tip of the latch lever piece is formed at a symmetrical position of the above, and the outer wall side of the protruding mold is the said. An optical adapter cap manufacturing device characterized in that an inwardly tapered surface is formed toward the tip corresponding to a curved recess. The light according to claim 7, wherein the protruding mold is formed at a symmetrical position of the tip of the outer die of the cylinder body portion so as to correspond to a latch lever piece formed to face the inside of the optical adapter. Cap manufacturing equipment for adapters.

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