JP2009092882A - Ferrule for optical connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the insertion of optical fibers into optical fiber holes of a ferrule 14 for optical connector which is made by over-molding a ferrule main body part 15 with a resin on a hole-drilled plate 13 being a connection end face part on which a plurality of the optical fiber holes 11a are highly accurately provided. <P>SOLUTION: Fiber guide holes 11b, which are concentric with and have substantially the same diameters as the respective optical fiber holes 11a on the hole-drilled plate 13, are formed on the ferrule main body part 15, and a space part 18 is formed in the inner face side of the hole-drilled plate 13. Since there is the space part 18 in the inner face side of the hole-drilled plate 13, the optical fibers are easily inserted into the optical fiber holes 11a on the hole-drilled plate 13. Further, there is no possibility that shear stress or bending stress acts on the optical fibers at the inner face position of the hole-drilled plate 13 and that the optical fibers are broken, and the increase in optical loss is not incurred. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a ferrule for a resin optical connector, and in particular, a light formed by overmolding a ferrule main body portion with a resin on a hole processed plate as a connection end surface portion in which a plurality of optical fiber holes arranged in a lateral direction are formed with high accuracy. It relates to a ferrule for connectors.

Ferrules (ferrules for optical connectors) used in resin optical connectors (JIS C 5981: equivalent to F12 type multi-core optical fiber connectors), which are commonly referred to as MT connectors, are optical fiber holes arranged in a horizontal row It is a structure provided with guide pin holes for positioning on both sides of the row.
In addition, a two-dimensional optical connector ferrule of the MT connector type in which optical fiber holes are provided in multiple stages and an optical fiber can be terminated at a high density has been developed.
This type of ferrule is a resin-integral molded product having a substantially square shape, but as shown in FIGS. 11 (a) and 11 (b), a metal or ceramic provided with an optical fiber hole 1a and a guide pin hole 2 for positioning. There is a ferrule 4 in which a hole processing plate 3 made of insert or the like is insert-molded (the ferrule main body portion 5 is overmolded with resin on the hole processing plate 3) (see Patent Document 1).
An optical fiber hole can be formed in one or more stages on the hole processed plate.
The ferrule body 5 is formed with a hollow portion 6 including an optical fiber introduction opening 6a and an adhesive filling window 6b, and an optical fiber hole 1b concentric with the optical fiber hole 1a of the hole processing plate 3. The
The internal structure of the two-dimensional optical connector ferrule is different from the standard MT connector having one optical fiber hole in the structure of the optical fiber introduction portion.
The optical fiber introduction structure of the two-dimensional optical connector ferrule is formed in, for example, a plurality of steps.
That is, a step portion is formed according to the height of the optical fiber hole for each step, and a guide groove is formed on the surface of each step portion.
Alternatively, the connection end face side inside the ferrule main body may be a single vertical wall portion without the guide structure, and an optical fiber hole may be opened in the vertical wall portion.
JP-A-9-325241 Japanese Patent No. 3764043 (described later)

The ferrule 4 ′ shown in FIG. 12 shows an example in which the outer shape is the same as the ferrule of FIG. 11, but the internal structure is different.
The ferrule body 5 ′ has a hole processing plate 3 with an optical fiber hole 1 a and a hollow portion 6 that reaches the hole processing plate 3.
In this ferrule 4 ′, the distance from the rear end of the ferrule to the optical fiber hole 1a becomes long, so that it becomes difficult to insert the optical fiber into the optical fiber hole 1a. This problem is particularly serious in the case of a two-dimensional ferrule in which optical fiber holes are formed in multiple stages.
Therefore, in order to insert the optical fiber into the optical fiber hole, it is necessary to use a guide jig for guiding the tip of the optical fiber into the optical fiber hole.
Further, there is no structure for supporting the optical fiber extending outside the optical fiber hole 1a inside the ferrule.
As a result, the position of the optical fiber becomes unstable.
When the optical fiber extending outside the optical fiber hole is a bare wire, even if the optical fiber is bonded and fixed with an adhesive filled in the ferrule, breakage due to shear stress or bending stress and increase in optical loss are likely to occur.
In particular, stress may be locally applied at the entrance of the optical fiber hole 1a.

In Patent Document 2 (Patent No. 3764043: Multi-stage optical connector ferrule), a guide groove facing each optical fiber hole in a two-stage optical fiber hole array is provided in a staircase shape. The fiber hole interval (especially the vertical interval) becomes wide and high-density mounting of optical fibers becomes impossible.
In addition, the structure becomes complicated, the molding is not easy, and the size of the ferrule is increased.

  The present invention has been made to eliminate the above-mentioned conventional drawbacks. In a ferrule for an optical connector having a high-precision optical fiber hole, the optical fiber can be easily inserted into the optical fiber hole. It is an object of the present invention to provide a ferrule for an optical connector that can prevent the application of various shearing stresses and bending stresses and that can be manufactured at low cost because of its simple structure.

The present invention that solves the above problems is a ferrule for an optical connector in which a plurality of optical fiber holes arranged in a lateral direction are formed with high precision, and a ferrule body portion is overmolded with a resin on a hole processing plate as a connection end surface portion. There,
The ferrule body is formed with a fiber guide hole that is concentric and substantially the same diameter as each optical fiber hole of the hole processed plate, and a space is formed on the inner surface side of the hole processed plate.

  According to a second aspect of the present invention, in the ferrule for an optical connector according to the first aspect, the hole processed plate has guide pin holes on both sides of the optical fiber hole array, and the ferrule body portion is concentric and substantially the same as the guide pin hole of the hole processed plate. A guide pin hole having a diameter is provided.

  According to a third aspect of the present invention, in the ferrule for an optical connector according to the first or second aspect, the optical fiber hole array in the hole processing plate and the fiber guide hole array in the ferrule main body are formed in a plurality of stages. .

  According to a fourth aspect of the present invention, in the ferrule for an optical connector according to any one of the first to third aspects, the portion having the fiber guide hole in the ferrule main body is a separate member from the other portion of the ferrule main body as a guide hole block. It is characterized by.

  According to a fifth aspect of the present invention, in the ferrule for an optical connector according to any one of the first to third aspects, the ferrule body is integrally molded with a resin including a fiber guide hole.

  According to a sixth aspect of the present invention, in the optical connector ferrule according to any one of the first to fifth aspects, the hole processing plate is a plane perpendicular to the longitudinal direction of the optical fiber.

  A seventh aspect of the present invention is the optical connector ferrule according to any one of the first to sixth aspects, wherein the hole processed plate is a metal plate, a ceramic plate, or a plastic plate.

  An optical connector ferrule according to claim 1, wherein each fiber guide hole of the guide hole block is curved in a direction having an angle with respect to the direction from a direction concentric with the optical fiber hole of the hole processing plate. It is characterized by being.

  According to a ninth aspect of the present invention, in the ferrule for an optical connector according to any one of the first to eighth aspects, an adhesive is filled in a space portion inside the hole processed plate.

The invention of claim 10 is a ferrule for an optical connector in which a plurality of optical fiber holes arranged in a lateral direction are formed with high accuracy, and a ferrule body portion is overmolded with a resin on a hole processed plate as a connection end surface portion. ,
A plurality of guide grooves corresponding to the respective optical fiber holes of the hole processed plate are formed in the ferrule main body, and a space is formed on the inner surface side of the hole processed plate.

According to the ferrule of the first aspect of the invention, if the optical fiber hole of the hole processed plate is processed with high accuracy, the optical fiber hole of the ferrule main body portion made of resin is not required to have a very high accuracy. An easy and inexpensive ferrule can be manufactured with good yield.
Moreover, since there is a space on the inner surface side of the hole processed plate (that is, between the optical fiber hole inlet of the hole processed plate and the fiber guide hole outlet of the ferrule main body), the optical fiber hole of the hole processed plate and the ferrule main body It is possible to prevent the occurrence of local stress on the optical fiber due to the error of the hole position at the boundary with the fiber guide hole of the portion.
In other words, since the optical fiber is in a free state in the space portion, local shear stress and bending on the optical fiber at the boundary between the space portion and the optical fiber hole generated before and after filling and fixing with the adhesive are particularly important. The effect of stress is reduced. Therefore, the stress does not cause breakage or increase in optical loss.

  A third aspect of the present invention is applied to a two-dimensional array type optical ferrule having a plurality of optical fiber hole arrays. When it is applied to a two-dimensional array type optical ferrule, if the guide groove is provided as a guide portion to the optical fiber hole of the hole processing plate, the optical fiber hole interval (particularly the vertical interval) at the joint end face becomes wide. However, it is difficult to arrange the optical fiber holes closely and the size of the ferrule becomes large. However, since the guide part on the ferrule body side is a hole (fiber guide hole), the optical fiber holes on the hole processing plate are arranged closely. This makes it possible to manufacture a compact two-dimensional array type optical ferrule even when the number of cores is large.

  If the fiber guide hole portion in the ferrule main body portion is configured as a separate guide hole block, the resin molding of the ferrule main body portion is facilitated. That is, by making the guide hole block into a simple shape such as a small cuboid, resin molding of the guide hole block having a fiber guide hole that requires a certain degree of accuracy is easy, while the guide of the ferrule main body part Since the portion excluding the hole block is not required to be very precise, resin molding of the ferrule body is facilitated.

  According to the ferrule for an optical connector of the eighth aspect, the optical connector can be used for an optical connector that performs optical path conversion and optical connection.

  In claim 10, a guide groove is provided instead of a fiber guide hole as a guide portion to the optical fiber hole of the hole processed plate. Even in this case, the effect substantially similar to the effect of the invention of claim 1 is obtained. can get.

  The optical connector ferrule embodying the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an optical connector ferrule 14 according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof.
This optical connector ferrule (hereinafter simply referred to as a ferrule in some cases) 14 corresponds to a fitting pin positioning type optical connector (JIS C 5981: F12 type multi-core optical fiber connector) generally called an MT connector as a basic structure. This corresponds to the ferrule used in ().
Positioning guide pin holes are provided on both sides of the optical fiber hole array arranged in one horizontal row.
A general ferrule for an MT optical connector is an integral resin molded product, but the ferrule 14 has a plurality of optical fiber holes 11a arranged in the horizontal direction and guide pin holes 12 on both sides of the optical fiber hole array. A rectangular hole drilling plate 13 as a connection end face portion is provided as a connection end face with high accuracy.
The hole processed plate 13 has a uniform thickness, and the surface serving as the end surface on the connection side is a smooth surface.
The back surface on the inner side of the ferrule is preferably a smooth surface having the same surface roughness as that of the front surface. However, since the back surface is not involved in connector connection, the same degree of smoothness is not necessarily required.
This hole processed plate 13 is insert-molded in a ferrule with resin.
The optical fiber hole 11a is opened perpendicularly to the front and back surfaces of the hole processed plate 13, and is substantially the same diameter for an optical fiber diameter of, for example, 125 μm in order to accurately position the bare optical fiber. Are opened with a precision of about 126 μm to 127 μm in diameter.
Similarly, the pitch in the arrangement direction of the optical fiber hole rows is also formed with high accuracy.
The hole processing plate 13 is arranged at the tip of the ferrule in a direction in which the front and back surfaces are perpendicular to the longitudinal direction (connection direction) of the ferrule.
By overmolding the periphery of the hole processed plate 13 with the resin of the ferrule body portion 15, the ferrule is formed so as to form a generally square shape as a whole.
At the same time, a flange 15a is formed on the rear end side of the ferrule.
The ferrule main body 15 has a hollow portion 16 including an opening portion 16a for introducing an optical fiber and an adhesive filling window 16b, and an optical fiber hole 11a of the hole processing plate 13 and a longitudinal direction (the left-right direction in FIG. 2). Concentric (same position), fiber guide holes 11b having substantially the same diameter are formed.
A guide groove 16c is formed on the inside facing the adhesive filling window 16b and facing the tapered inlet of the fiber guide hole 11b.
The entrance of the optical fiber hole 11a is also tapered to guide the optical fiber.
A bottomed space 18 that opens upward is formed on the inner surface side of the hole processed plate 13.
The space 18 is a recess formed on the upper surface of the ferrule body 15, and the entrance of the optical fiber hole 11 a of the hole processed plate 13 and the exit of the fiber guide hole 11 b of the ferrule body 15 face the space.

When the above ferrule 14 is resin-molded, it corresponds to the ferrule end face of the cavity in the upper and lower molds forming cavities and convex portions (convex portions corresponding to the adhesive filling window 16b portion and the space portion 18) according to the ferrule shape. The hole processing plate 13 is disposed at the position.
A core for forming the guide pin hole 12, the fiber guide hole 11b, the guide groove 16c, its upper space, and the optical fiber introducing opening 16a is disposed.
And resin is inject | poured into the cavity of a metal mold | die, and the ferrule 14 which overmolded the ferrule main-body part 15 in the hole processing board 13 is obtained.
As the material of the hole processed plate 13, a metal plate is appropriate, but a ceramic plate or a plastic plate made of the same material as the ferrule main body can be used.
As the resin of the ferrule body 15, a resin used for a normal MT connector ferrule, such as PPS or an epoxy resin, can be used.
An optical fiber made of all quartz can be suitably used as the optical fiber terminated with the optical connector. The bare optical fiber diameter is not particularly limited, but a diameter of 80 μm can be used in addition to 125 μm.

FIG. 3 shows the ferrule 14 attached to an optical fiber.
A plurality of single-core optical fibers (bare fibers) 10a from which the end coating of the multi-fiber optical fiber (optical fiber tape) 10 is removed are inserted into the fiber guide holes 11b along the guide grooves 16c corresponding to the respective optical fibers. To do.
The optical fiber 10 a that has passed through the fiber guide hole 11 b is further pushed in, and the tip of the optical fiber 10 a is inserted into the optical fiber hole 11 a of the hole processing plate 13 while straddling the space 18.
When the optical fiber insertion operation is completed, the adhesive 19 is filled in the adhesive filling window 16b and the space 18 and the optical fiber is bonded and fixed to the ferrule body.
Both ends of the optical fiber 10a extending to the space 18 are supported, but the intermediate portion is free.
In the figure, reference numeral 10b denotes a coated portion of the optical fiber, and the tip is a bare optical fiber (bare optical fiber, bare fiber).
Although the position of the covering end is not limited to the illustration, at least the optical fiber extending into the space 18 is a bare optical fiber.

In the ferrule 14 described above, the optical fiber hole 11a of the hole processed plate 13 needs to be processed with high accuracy in order to realize good optical connection characteristics. However, the fiber guide hole 11b of the ferrule body portion 15 made of resin is However, the accuracy as high as the optical fiber hole 11a is not necessarily required.
By forming the space portion 18, the fiber guide hole of the resin ferrule is shortened.
If the fiber guide becomes long, the hole may be warped during resin molding, making it impossible to insert the optical fiber. However, if the guide hole length is shortened by providing a space as in this embodiment, the amount of warpage will be reduced and the optical fiber will be reduced. The problem of poor insertion is reduced.
That is, the resin molding of the optical connector ferrule is facilitated, and the ferrule manufacturing yield is improved.
The internal dimension d between the entrance of the optical fiber hole 11a of the hole processed plate 13 and the exit of the fiber guide hole 11b of the ferrule main body 15 that becomes the width of the space 18 is, for example, about 1.0 to 1.5 mm. Is appropriate.
This numerical range is determined on the basis of the following.
First, the space 18 is a space for adjusting the position of the tip of the optical fiber, facilitates the insertion of the optical fiber hole 11a of the hole processing plate 13, and positions such as axial misalignment between the optical fiber hole 11a and the guide hole 11b. This is the part that eliminates the effects of errors.
That is, when there is an error in the axial direction of the optical fiber hole 11a of the hole processed plate 13, when the hole processed plate 13 and the exit of the fiber guide hole 11b approach each other and become 1.0 mm or less, the optical fiber extending into the space portion 10a cannot bend gently in the space portion, and shearing or bending stress acts locally at the end of the space portion to cause breakage or increase in optical loss.
However, if the hole processing plate 13 and the exit of the fiber guide hole 11b are separated by an appropriate distance, the optical fiber 10a extending to the space portion can be bent gently in the space portion. The shear stress and bending stress do not act strongly to break or increase the optical loss.
When the distance between the hole processing plate 13 and the exit of the fiber guide hole 11b is 1.5 mm or more, the portion supporting the optical fiber 10a extending to the space portion is separated, and the optical fiber 10a is separated from the hole processing plate 13. Since it hangs down, there is a risk of unexpected fracture or bending stress acting locally in the vicinity of the hole-worked plate 13 at the time of bonding and fixing, resulting in breakage or increased optical loss.

FIG. 4 is a perspective view showing an optical connector ferrule 24 according to another embodiment of the present invention, and FIG. 5 is a longitudinal sectional view thereof.
In the ferrule 14 of the embodiment shown in FIGS. 1 to 3, the ferrule main body portion 15 is integrally resin-molded including the fiber guide hole 11b, whereas the ferrule 24 of this embodiment is a ferrule main body portion 25. The portion in which the fiber guide hole is formed is a separate member from the other portion (referred to as a ferrule sub-main portion) 25 b of the ferrule body portion 25 as a guide hole block 27.
A fiber guide hole formed in the guide hole block 27 is denoted by 11b.
A large space 29 including a hollow portion 26 including an optical fiber introduction opening portion 26 a and an adhesive filling window 26 b and a space portion 28 inside the hole processing plate 23 is formed in the ferrule body portion 25.
A rectangular parallelepiped guide hole block 27 is fitted into and fixed to the shallow fitting groove 25c for positioning formed near the center of the space 29.
Before and after the guide hole block 27, a hollow portion 26 including an opening portion 26a for introducing an optical fiber and an adhesive filling window 26b and a space portion 28 inside the hole processing plate 23 are formed.
Reference numeral 22 denotes a guide pin hole.

Although the fiber guide hole 11b is required to have a certain degree of accuracy although not as high as the optical fiber hole 11a of the hole processing plate 23, in the ferrule 24 of this embodiment, the guide hole block 27 having the fiber guide hole 11b is simply a rectangular parallelepiped. Because of its simple shape, the resin molding is easy. On the other hand, since the portion excluding the guide hole block 27 in the ferrule main body portion 25 (ferrule sub-main portion 25b) is not required to be very accurate, resin molding of the ferrule main body portion 25 as a whole becomes easy.
Further, since the guide hole block 27 is a separate member, the ferrule sub-main body portion 25b is used in common, and the hole processing plate 23 and the guide hole block 27 are replaced with predetermined ones, thereby producing optical connector ferrules having different numbers of cores. It is also possible. In this case, the outer shape of the hole processing plate 23 and the guide hole block 27 is the same, and the modes of the holes 11a and 22 of the hole processing plate 23 and the fiber guide hole 11b of the guide hole block 27 are changed.
In addition, although the guide hole block 27 can be made into the resin molded product shape | molded with the same resin as the ferrule main-body part, a material etc. are not specifically limited.
The guide hole block 27 is molded separately from the ferrule main body and mounted on the ferrule main body. However, when the hole processing plate 23 is overmolded to the ferrule main body, the hole processing plate 23 is placed in the mold. It is also possible to arrange and mold the guide hole block 27 together.

FIG. 6 is a perspective view showing an optical connector ferrule 34 according to still another embodiment of the present invention, and FIG. 7 is a longitudinal sectional view thereof.
This ferrule 34 is applied to a two-dimensional array type optical connector ferrule.
As in the ferrule 24 of the embodiment of FIGS. 4 and 5, the ferrule 34 of the embodiment uses a fiber guide hole portion in the ferrule body 35 as a separate member as a guide hole block. That is, two-dimensionally arranged optical fiber holes 11a and fiber guide holes 11b are formed in the hole processing plate 33 and the guide hole block 37, respectively.
In the illustrated example, the optical fiber hole rows of the hole processing plate 33 are formed in nine stages in the vertical direction.
The optical fiber hole rows of the guide hole block 37 are formed in nine stages on the top and bottom.
The arrangement pattern of the optical fiber hole arrays of the hole processed plate 33 and the fiber guide hole block 37 is the same.
4 and 5, a large space 39 including a hollow portion 36 including an optical fiber introduction opening 36 a and an adhesive filling window 36 b and a space portion 38 inside the hole processing plate 33. Is formed.
A rectangular parallelepiped guide hole block 37 is fitted and fixed in a shallow fitting groove 35c for positioning formed near the center of the space 39.
Before and after the guide hole block 37, a hollow portion 36 including an optical fiber introduction opening 36a and an adhesive filling window 36b and a space 38 inside the hole processing plate 33 are formed.
Reference numeral 32 denotes a guide pin hole.
The guide hole block 37 is fixed to the ferrule body at a position where the axial centers of the optical fiber holes of the hole processed plate 33 and the guide hole block 37 coincide.

When applied to a two-dimensional array type ferrule, if the guide groove is provided as a guide part to the optical fiber hole of the hole processing plate, the distance between the optical fiber holes (particularly the vertical distance) at the joint end face becomes wide, and the optical fiber There is a drawback that it is difficult to arrange the holes densely and the size of the ferrule becomes large.
However, in this ferrule 34, the guide portion on the ferrule body 35 side is a hole (fiber guide hole 11b), and there is no extra structure that widens the hole row interval. Can be arranged densely, and a compact two-dimensional array type optical ferrule can be manufactured even if the number of cores is large.
In addition, since the fiber guide hole of the guide portion is located near the optical fiber insertion opening side, just by inserting the optical fiber into the guide pin hole, the connection end surface side opposite to the optical fiber insertion opening side It is possible to easily insert the optical fiber into the precision optical fiber hole located far away.
The guide hole block 37 is molded separately from the ferrule main body and mounted on the ferrule main body. However, when the hole processing plate 33 is overmolded to the ferrule main body, the hole processing plate 33 is placed in the mold. It is also possible to arrange and mold the guide hole block 37 together.

FIG. 8 is a perspective view showing an optical connector ferrule 44 according to still another embodiment of the present invention, and FIG. 9 is a longitudinal sectional view thereof.
The ferrule 44 of this embodiment is applied to a ferrule for an optical path conversion type optical connector. Each fiber guide hole 11b of the guide hole block 47 is concentric with the optical fiber hole 11a of the hole processing plate 43 (FIG. 9). From the left-right direction) in a direction having an angle with respect to that direction (in the illustrated example, a right-angle direction). The ferrule main body 45 includes a guide hole block 47 and a portion excluding the guide hole block 47 (ferrule sub main body) 45b. A space 48 is formed between the hole processing plate 43 and the guide hole block 47. 46a is an optical fiber introduction opening.
In this ferrule 44, each optical fiber of the optical fiber tape introduced from the optical fiber introduction opening 46a is inserted into the fiber guide hole 11b, and further inserted into the optical fiber hole 11a of the hole processing plate 43 through the space 48. For example, the ferrule 44 can be installed on the photoelectric composite substrate with the optical fiber hole 11a side of the hole processing plate 43 as the light input / output end.

FIG. 10 is a longitudinal sectional view showing an optical connector ferrule 54 according to still another embodiment of the present invention.
The ferrule 54 has a ferrule main body 55 provided with a guide groove 56 c as a guide portion to the optical fiber hole 11 a of the hole processing plate 53. The ferrule 54 in the illustrated example generally corresponds to a structure in which the guide groove 16c in the ferrule 14 in FIG. 2 is extended to the space 18 and the fiber guide hole 11b portion is eliminated. The hollow portion 56 in the ferrule includes an opening portion 56a for introducing an optical fiber and an adhesive filling window 56b, and communicates with a space portion 58 inside the hole processing plate 53 via an upper space 56d of the guide groove.

It is a perspective view of the ferrule for optical connectors of one Example of this invention. It is a longitudinal cross-sectional view of FIG. It is the longitudinal cross-sectional view shown in the state which attached the ferrule for optical connectors of FIG. 2 to the optical fiber. It is a perspective view of the ferrule for optical connectors of the other Example of this invention. It is a longitudinal cross-sectional view of FIG. It is a perspective view of the ferrule for optical connectors of the further another Example of this invention. It is a longitudinal cross-sectional view of FIG. It is a perspective view of the ferrule for optical connectors of the further another Example of this invention. It is a longitudinal cross-sectional view of FIG. It is a longitudinal cross-sectional view which shows the ferrule for optical connectors of the further another Example of this invention. The conventional ferrule for optical connectors is shown, (A) is a perspective view, (B) is a longitudinal sectional view of (A). It is a longitudinal cross-sectional view of the other conventional ferrule for optical connectors.

Explanation of symbols

10 Optical fiber tape 10a Optical fiber (bare fiber)
11a Optical fiber hole 11b (of the hole processed plate) Fiber guide hole 12, 22, 32 (of the ferrule body) Guide pin holes 13, 23, 33, 43, 53 Hole processed plates 14, 24, 34, 44, 54 Light Ferrule for connector (ferrule)
15, 25, 35, 45, 55 Ferrule body parts 16, 26, 36, 56 Hollow parts 16a, 26a, 36a, 46a, 56a Optical fiber introduction openings 16b, 26b, 36b, 56b Adhesive filling window 16c Guide groove 18, 28, 38, 48, 58 Space 19 (inside the hole processing plate) Adhesive 56c Guide groove

Claims (10)

A ferrule for an optical connector in which a plurality of optical fiber holes arranged in a lateral direction are drilled with high accuracy, and a ferrule body portion is overmolded with a resin on a hole processing plate as a connection end surface portion,
A ferrule for an optical connector, wherein a fiber guide hole is formed concentrically and substantially the same diameter as each optical fiber hole of the hole processed plate in the ferrule main body, and a space is formed on the inner surface side of the hole processed plate. .   The hole processed plate has guide pin holes on both sides of an optical fiber hole array, and the ferrule main body has guide pin holes that are concentric with and substantially the same diameter as the guide pin holes of the hole processed plate. Item 6. A ferrule for an optical connector according to Item 1.   3. The ferrule for an optical connector according to claim 1, wherein a plurality of optical fiber hole arrays in the hole processed plate and a plurality of fiber guide hole arrays in the ferrule main body are formed vertically.   4. The ferrule for an optical connector according to claim 1, wherein a portion having the fiber guide hole in the ferrule main body is a member different from the other portion of the ferrule main body as a guide hole block. .   The ferrule for an optical connector according to any one of claims 1 to 3, wherein the ferrule main body is integrally molded with a resin including a portion of the fiber guide hole.   The ferrule for an optical connector according to any one of claims 1 to 5, wherein the hole processed plate is a plane perpendicular to the longitudinal direction of the optical fiber.   The ferrule for an optical connector according to claim 1, wherein the hole processed plate is a metal plate, a ceramic plate, or a plastic plate.   2. The optical connector according to claim 1, wherein each fiber guide hole of the guide hole block is curved in a direction having an angle with respect to the direction from a direction concentric with the optical fiber hole of the hole processing plate. Ferrule.   The ferrule for an optical connector according to any one of claims 1 to 8, wherein an adhesive is filled in a space portion inside the hole processed plate. A ferrule for an optical connector in which a plurality of optical fiber holes arranged in a lateral direction are drilled with high accuracy, and a ferrule body portion is overmolded with a resin on a hole processing plate as a connection end surface portion,
A ferrule for an optical connector, wherein a plurality of guide grooves corresponding to each optical fiber hole of the hole processed plate are formed in the ferrule main body, and a space is formed on the inner surface side of the hole processed plate.

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