JP2009051512A - Packing case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packing case for an optical module, which stores just enough an optical element and an optical connector existing on both ends of an optical fiber regardless its length, and prevents the optical element from failing. <P>SOLUTION: The packing case has: an inner case 8 having a recessed part for storing an optical element case 33 and prepared of a plastic sheet having at least partially electrically conductive properties; a central recessed part 4 for placing the inner case; and an annular peripheral channel 3 formed so as to surround the central recessed part for winding the optical fiber and having an approximately equal width to the width of the optical connector, and includes an outer case 2 prepared of a plastic sheet. The optical fiber is wound in the peripheral channel, the optical connector 34 is pinched by a holding plate 20 made of a plastic, and the optical connector pinched by the holding plate is pushed into an arbitrary position of the orbital channel to fix elastically it, or without using the holding plate, the optical connector is directly pushed in the orbital channel to fix elastically it. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an optical module packaging case including a light receiving element, a light emitting element or both, an optical fiber, and an optical connector. An optical receiver module includes a light receiving element, an optical fiber, and an optical connector. What consists of a light emitting element, an optical fiber, and an optical connector is called an optical transmission module. A device composed of a light emitting element, a light receiving element, an optical fiber, and an optical connector is called an optical transceiver module. The present invention includes all these three types of modules. These are simply referred to herein as optical modules. The constituent elements are a light emitting element / light receiving element, an optical connector and an optical fiber connecting them.
The light emitting element / light receiving element is housed in a metal case, and a lead pin projects outside from the metal case. An optical fiber extends from the front of the metal case. One surface of the optical connector is connected to the other end of the optical fiber. The end of the optical fiber is exposed on the other surface of the optical connector. The end face has a guide pin or a hole into which the guide pin is to be inserted.
Since the optical fiber is long, it is necessary to wrap the optical fiber around the optical module housing case. Since the optical element (light emitting element / light receiving element) has a lead pin in the lateral direction, it is necessary to provide a recess corresponding thereto.
In addition, there are optical modules having different optical fiber lengths, and it is desirable to have a case in which optical fiber modules having different lengths can be held in common.

  Patent Document 1 discloses a plug, an optical fiber, an optical switch, an optical device, in which a total of seven members each made of three foamed polypropylene plates, a square frame, two foamed polypropylene cylindrical members, and a polypropylene bottom plate processed into a cardboard shape are stacked. A housing case for a structure consisting of fiber plugs is proposed. A bottom plate, a foam plate having two round holes, and two foam plates having two round holes and a common tangential cut line are stacked and bonded to form a frame. A container consisting of four vertically stacked members is prepared. The optical fiber structure to be fixed has an optical switch in the middle, from which the optical fiber extends to both. An optical connector is attached to the end of the optical fiber.

  This is not an optical module because it does not include a light receiving element, a light emitting element, or the like. There is a switch in the middle of the optical fiber. The two foamed polypropylene plates have two circular holes on the left and right. A concave portion for embedding and fixing the optical connector is formed on the cylindrical member. An optical connector is embedded in the concave portions of the heads of the two cylindrical members, and an optical fiber is wound around the peripheral surfaces of the cylindrical members. The cylindrical member fixes the optical connector on the upper surface and inserts and fixes the optical fiber around the side surface. Further, the lid plate is inserted into the frame to fix the lid.

  Patent Document 2 proposes a case for accommodating an optical fiber assembly in which plugs are attached to both ends of the optical fiber. It is a plate-shaped plastic molded product, and there is a central fiber recess for winding a circular optical fiber at the center, and plug recesses for receiving plugs are provided at four corners. The plug recess and the optical fiber recess are connected by a groove corresponding to a tangent of a circle. The plug recesses on the diagonal are not used at the same time. The plug is inserted into one of the four corner plug recesses, the optical fiber is wrapped around the wall of the central recess, and the terminal plug is inserted and secured into the two possible plug recesses. Further, a lid plate formed with a plastic plate is sealed.

  This is formed by molding a thin plastic plate, and is simpler than the case where four foamed plastic plates are stacked as in Patent Document 1. Three of the four plug recesses can be used. If the start plug is inserted into a certain plug recess, the direction is reversed, so there is no possibility that the end plug will enter the diagonal recess. However, end plugs can be inserted in either of the two adjacent recesses. The advantage is that even if the length of the optical fiber changes, the end plug can be inserted and fixed in either of the recesses.

JP 2001-122336 A JP 2006-091831 A

  Patent Document 1 proposes that a part including an optical fiber and an optical connector is accommodated in a container in which four foamed plastic plates are combined. This container is complicated in structure, has a drawback that the material cost is high, and it takes time and effort to manufacture. Furthermore, since the optical fiber having plugs at both ends is wound around the two cylindrical portions, the size of the case is required to be about twice. The optical fiber should not be less than the allowable minimum bend radius (for example, 30 mm). The radius of the cylindrical portion is equal to or greater than the minimum allowable bending radius of the optical fiber. There are two such cylindrical parts on the left and right.

  Accordingly, the container of Patent Document 1 has an excessively large area. The container area cannot be reduced because two cylindrical parts with excessive areas are used. The container of Patent Document 1 is solid because it uses foamed plastic. Therefore, the weight of the container is large. When a large number of containers are stacked, the containers slide sideways and cannot be positioned. It can only accommodate optical fibers that are plugs at both ends. An optical module container having an optical element at one end of an optical fiber cannot be used.

  In Patent Document 2, an optical fiber having plugs at both ends is wound in a ring shape around a central cylindrical portion, and the plugs at both ends are pushed into two recesses at four corners. If the length of the optical fiber is constant, it is determined which two recesses the plug should be inserted into. Optical fibers having different lengths by an integral multiple of half the circumference K can be accommodated. However, if the length of the optical fiber is not a difference of an integral multiple of half the circumference K, there will be a little extra optical fiber. That is, a part of the optical fiber can be loosened. It cannot cope with an optical fiber having an arbitrary length.

The present invention is a packaging case for accommodating an optical module in which an optical element case, an optical fiber, and an optical connector are connected, and an inner part made of a conductive plastic plate at least partially having a recess for accommodating the optical element case. An outer case made of a plastic plate having a case, a central recess for receiving the inner case, and an annular circumferential groove having a width substantially equal to the width of the optical connector formed to surround the central recess for winding the optical fiber; The optical connector is sandwiched between the holding plates, or the holding plate is not sandwiched, and the optical connector is pushed into the circumferential groove and is elastically fixed.
Since the optical connector is fitted and fixed in the middle of the circumferential groove having a width substantially equal to the width of the optical connector, the optical fiber may have any length.

  The inner ring outer periphery and the outer periphery inner periphery on the left and right of the circumferential groove may be smooth. If it is smooth, the rigidity and strength may be insufficient and the frictional force may be insufficient. Accordingly, the optical connector may be prevented from slipping by providing irregularities on the outer circumferences of the left and right inner rings and the inner circumference of the outer edge. Since the plastic plate is weak in strength and rigidity as it is, it is possible to increase the rigidity and strength by forming irregularities. Also, the frictional force that holds the optical connector increases.

  The holding plate may be an overlying type that is inserted into the optical connector from above. The holding plate may be a lower suspension type that is inserted into the optical connector from below. The holding plate may be provided with unevenness and curvature to increase rigidity, strength, and frictional force.

  An optical module including an optical element, an optical fiber, and an optical connector is housed in an inner case made of conductive plastic at the optical element portion. Since the lead pin protrudes from the optical element and the impedance is high, it is charged with a small amount of electric charge and becomes a high voltage, which may cause dielectric breakdown. In the present invention, since the optical element is placed in the conductive inner case, the lead pin and the case are at the same potential, and there is no fear that the element is destroyed.

  The portion where the optical fiber is wound must be larger than the allowable bending radius of the optical fiber. The optical fiber winding portion has a large diameter and requires a considerable area. In the present invention, an optical element is installed in a central recess, and an optical fiber is wound around the optical element. The present invention effectively utilizes a large central area without wasting it. This is superior to Patent Document 2.

  In the present invention, the optical connector is fitted and fixed in the middle of a circumferential groove having a width substantially equal to the width of the optical connector. It can be fixed to any part of the circumferential groove around which the optical fiber is wound. The length of the optical fiber may be any. This is the most excellent effect. When the optical connector is held at a site different from the optical fiber, such an optical module having an optical fiber having an arbitrary length cannot be skillfully accommodated. This is possible because the optical connector is fixed in the middle of the circumferential groove around which the optical fiber is wound.

In some cases, the width of the optical connector and the width of the circumferential groove are substantially the same, and the optical connector can be firmly fixed only by being pushed into the circumferential groove. Alternatively, an elastic holding plate is interposed between the optical connector and the circumferential groove, so that the optical connector can be firmly fixed to the circumferential groove even if the difference in width between the circumferential groove and the optical connector is somewhat large.
Cases containing optical modules can be stacked vertically. When stacked, they are integrated and do not skid, so they are convenient for transportation and storage.

[Example 1 (circular groove smooth surface wall, upper straddle type holding plate)]
The case for the optical module of the present invention comprises a circumferential groove around which an optical fiber is to be wound, an outer case provided with a central recess, and an inner case that accommodates an optical element. The inner case is inserted into the outer case central recess. Two cases are integrated. When the outer case and the inner case are combined, a single plate is formed. The edges are open at an angle, so the cases can be stacked one above the other.

  The case according to the first embodiment will be described with reference to FIGS. FIG. 1 is a plan view of the whole. 2 is a perspective view of only the outer case, and FIG. 3 is a perspective view of the optical case portion of the optical module accommodated in the inner case. FIG. 4 is a plan view of a state where the optical connector is pushed into the circumferential groove and fixed.

  The outer case 2, which is a plastic molded product, is square when viewed from above, but has upper and lower unevenness on the surface. It is made at once by plastic molding such as polystyrene and polyethylene terephthalate (PET). FIG. 2 shows the entire outer case 2 well. An annular circumferential groove 3 is formed in the middle portion of the outer case 2. This is a groove for winding and holding an optical fiber. The optical fiber should not be bent with excessive curvature. This is a circular groove 3 having a radius larger than the minimum allowable radius of the optical fiber. Since the allowable minimum radius is, for example, about 30 mm, the radius of the circumferential groove 3 is larger than 30 mm. For example, it is about 50 mm to 80 mm. A central recess 4 is provided at the center. The central concave portion 4 is a portion that houses an inner case that houses an optical element. The central inner wall 40 of the central recess 4 is substantially vertical, but the upper part is slightly wider. There are semicircular finger insertion holes 42 on both sides of the central recess 4. When the operator holds the inner case with the thumb and forefinger and puts it in the central recess 4, or puts the finger in here to grasp the inner case.

  Since the portion for housing the optical element is in the circumferential groove 3 for housing the optical fiber, there is room for increasing the radius of the circumferential groove. The optical element requires a larger area than the optical connector, and the arrangement in which the optical element is in the center and the optical fiber is wound around is advantageous because the bending radius of the optical fiber can be increased. Even if it says a recessed part, it is not what penetrated the board of the foamed plastic like the above-mentioned patent document 1. FIG. Instead, a plastic material is poured into a mold and hardened to form a plate with concave portions and convex portions with a substantially uniform thickness.

  A raised inner ring portion 6 is formed between the circumferential groove 3 and the central recess 4. The outside of the circumferential groove 3 is a raised outer edge portion 5. The outer edge 5 has a square outer shell. An outer side of the outer edge portion 5 has a vertically bent portion 50, and a rectangular outer peripheral piece 7 is formed outwardly at the lower end thereof. The upper and lower bent part 50 has a shape in which the lower side is slightly opened. Therefore, the same case can be stacked up and down. FIG. 13 shows such a stacked state. A cover plate 29 is placed on the top.

  The lateral width of the circumferential groove 3 is substantially the same as the width of the optical connector 34. When attaching a holding plate to the optical connector, the circumferential groove 3 is slightly larger than the optical connector width. Since it is formed of a plastic thin plate, it is elastic and the circumferential groove is appropriately deformed to hold the optical connector. There is no tangential exit in the circumferential groove 3. The circumferential groove 3 is closed in an annular shape. The circumferential groove 3 is partitioned by an outer edge inner periphery 39 that continues to the outer edge portion 5 on the outer side. The inner side is partitioned by an inner ring outer periphery 38 following the inner ring part 6. The height of the upper and lower bent portions 50 is higher than the inner ring outer periphery 38 and the outer edge inner periphery 39. Since there is such a height difference and the upper and lower bent portions 50 are spread downward, the outer case 2 having the same shape can be stacked vertically so that the upper and lower bent portions 50 are in contact with the inside and outside.

  An inner case 8 holding the optical element portion is fitted into the central recess 4. FIG. 3 shows a state in which the optical element case 33 is placed on the opened inner case 8. The inner case 8 is composed of a lower piece and a lid piece and is shaped so that both pieces can be combined. The lower piece has a cross-shaped recess composed of a through recess 9, a left recess 10, a rear recess 11, and a right recess 12. A portion of the optical element case 33 of the optical module 30 is housed in the cross-shaped concave portions 9, 10, 11, 12.

  The optical element case 33 includes several optical elements (light emitting element / light receiving element, LD, PD). In this example, the optical element case 33 has three optical elements: a middle light element 35, a right light element 36, and a left light element 37. For example, the medium light element 35 may be an LD, the right light element 36, and the left light element 37 may be PDs having different reception wavelengths. In the case of one optical transmission / reception module for both LD and PD, either of the left and right elements 36 and 37 does not exist. In the case of the optical receiving module, the optical element is only one PD. In the case of an optical transmission module, only the LD is an optical element. In that case, since the left and right light elements 36 and 37 do not exist and the light element case has a linear shape, a cross-shaped groove is unnecessary. Since the present invention aims to be a general-purpose type that can be used with any one, two, or three optical elements, a cross-shaped groove is formed on the inner case 8.

  A WDM (wavelength demultiplexer), a lens, and the like are provided inside the optical element case 33. A plurality of lead pins protrudes from the stem of the optical element. Also in this case, lead pins protrude from the optical elements 35, 36, and 37. The optical element case can be housed in the left concave portion 10, the rear concave portion 11, and the right concave portion 12 including the lead pins. The lower piece of the inner case 8 is connected to the lid piece 14 via the bent piece 13. The lid piece 14 has a side peripheral piece 15 so as to fit into the lower piece. An optical fiber 32 protrudes from the front of the optical element case 33. The optical fiber 32 exits from the through recess 9. An optical connector 34 is attached to the end of the optical fiber 32. The end of the optical fiber is exposed on the front surface of the optical connector 34. The number of optical fibers is arbitrary, such as 1 core, 2 cores, 4 cores, etc. When the lid piece 14 is closed, the lid piece 14 covers the optical element case 33. Since the frame 15 presses the side of the raised portion of the inner case, it is integrated. The integrated inner case 8 has a square shape. Only the optical fiber 32 and the optical connector 34 protrude from the inner case 8 to the outside.

The inner case 8 is made of conductive plastic. The optical element case is made of metal, and a plurality of pins protrude from the bottom of the optical element. If it is covered with an insulator, it will not disappear if charge is generated for some reason, and since it becomes a high voltage, there is a risk of discharge occurring and destroying the junction of the optical element. By covering the optical element case and the lead pins with conductive plastic, these pins and the case are set to the same potential. This prevents the optical element from being destroyed by discharge. The entire inner case may be made of conductive plastic. Or what laminated | stacked the conductive plastic on the base material of polyester and PET may be used.
Since the conductive plastic part cannot be recycled and is often disposed of, it is desired to minimize it as much as possible to save resources.

  The inner case 8 is fitted into the central recess 4 of the outer case 2. Since the dimensions of the outer periphery of the inner case 8 and the inner periphery of the central recess 4 are substantially the same, the inner case 8 can be temporarily fixed simply by fitting. The optical fiber 32 is taken out from the front opening of the central recess 4 and wound around the outer periphery 38 of the inner ring portion 6. The length of the optical fiber 32 varies depending on the object. The state shown in FIG. 1 is obtained with the optical connector 34 remaining. Further, the holding piece 20 which is elastic and can hold the optical connector 34 by elasticity is fitted into the optical connector. The holding piece 20 is an elastic piece member having a U-shaped cross section, and forms a plastic thin plate.

  The holding piece 20 has a flat upper piece 22 having substantially the same dimensions as the upper surface of the optical connector, followed by left and right inner vertical pieces 23, an upper and lower curved portion 24 following the lower end thereof, and subsequent left and right outer vertical pieces 25 and 25. . On the outer vertical piece 25, several vertical ridges 26, 26 are provided at equal intervals. The lower part is an opening 27. In the free state, the distance between the left and right inner vertical pieces 23 is smaller than the width of the optical connector 34. In the free state, the distance between the left and right outer vertical pieces 25 is greater than the difference between the inner and outer diameters of the circumferential groove 3. Behind the upper piece 22 is a drawer piece 28 serving as a clue for pulling out. In order to attach the holding piece 20 to the optical connector 34, the inner vertical pieces 23, 23 of the holding piece 20 are slightly opened and pressed against the optical connector 34. The left and right inner vertical pieces 23, 23 sandwich the side surface of the optical connector 34. The upper piece 22 contacts the upper surface of the optical connector 34. The optical connector 34 covered with the holding piece 20 is pushed into the circular groove 3 of the outer case 2. The vertical ridges 26 and 26 of the holding piece 20 strongly sandwich the side surface of the optical connector 34. Due to the elasticity of the bent portion 24, the longitudinal ridges 26 and 26 are strongly pressed against the inner ring outer periphery 38 and the outer edge inner periphery 39 of the circumferential groove 3.

  A plan view of the optical connector 34 with the holding piece 20 attached to the outer case 2 is shown in FIG. Although the inner ring outer periphery 38 and the outer edge inner periphery 39 of the circumferential groove 3 are smooth curved surfaces, a strong frictional force is generated between the inner ring outer periphery 38, the outer edge inner periphery 39 and the holding piece 20 of the circumferential groove 3 due to the elasticity of the holding piece 20. appear. Therefore, the optical connector 34 is stably fixed to the place where it is fitted. Whatever the length L of the optical fiber, the optical connector can be firmly fixed to any part of the circumferential groove 3. The fixing position of the optical connector can be continuously changed in the circular groove 3 corresponding to the diversity of the optical fiber length.

  The optical module can be accommodated in the outer case 2 in a planar manner. Since the upper and lower bent portions 50 of the outer case 2 are spread downward, a number of such outer cases 2 can be stacked. It is as FIG. Since the height of the upper and lower bent portions 50 is larger than the heights of the inner and outer circumferences of the inner and outer rings 38 and 39 of the circumferential groove 3, this difference becomes an overlap margin.

  The inner ring outer periphery 38 of the inner ring part 6 around which the optical fiber is wound must be larger than the allowable bending radius of the optical fiber. Therefore, the inner ring part 6 partitions a wide space. The present invention effectively uses such a wide space as a storage space for optical elements. It is cleverly used as a storage place for optical elements without wasting a large central space.

  The inner case 8 for temporarily fixing the optical element has three recesses 10, 11, and 12 in addition to the through recess 9 that is the exit of the optical fiber. The rear part such as LD, LED, PD and lead pins are accommodated here. Up to three optical elements can be stored. The present invention can be applied to a light receiving module with one PD, an optical transmission module with one LD, a transmission / reception module with one PD and an LD, a transmission / reception module with one LD and two PDs, or a transmission / reception module with two LDs and one PD.

[Example 2 (outer case in which periodic recesses are arranged on the inner ring outer periphery and outer edge inner periphery)]
In the outer case of the first embodiment, the inner and outer walls 38 and 39 of the circumferential groove 3 are smooth, so that there is a possibility that the holding piece 20 is slightly retracted due to vibration or the like and the optical fiber is loosened. In Example 2, a device was added to this point. As shown in FIGS. 5 and 6, circular groove-shaped recesses are provided at regular intervals on the inner ring outer periphery 38 and the outer edge inner periphery 39 of the circumferential groove 3. FIG. 5 is an overall view, and FIG. 6 is a perspective view of the outer case. FIG. 7 is a plan view of the outer case.

  As shown in FIG. 5, the inner case 8 containing the optical element case 33 is fitted in the central recess 4. The optical fiber 32 is wound around the circumferential groove 3. The end optical connector 34 is covered with the holding piece 20 and inserted into the circumferential groove from above.

  The outer case 2 has an annular circumferential groove 3 in the middle, a circular inner ring portion 6 inside the circumferential groove 3, and an outer edge portion 5 outside. There is a central recess 4 in the center. The upper and lower bent portions 50 on the outer side of the outer edge portion 5 are band-shaped portions extending downward. The leg portion is a frame-shaped outer peripheral piece 7.

  Inner arc grooves 43 are formed on the inner ring outer periphery 38 of the circumferential groove 3 at a predetermined interval. An outer arc groove 44 is formed on the inner periphery 39 of the outer edge of the circumferential groove 3. In this way, the circumferential groove 3 can be engaged. The inner arc groove 43 and the outer arc groove 44 cannot be provided near the portion of the opening of the inner ring portion 6 where the optical fiber is taken out.

  The holding piece 20 is fitted into the optical connector 34 to fix the optical connector 34 at an appropriate location in the circumferential groove 3. The holding piece 20 has the same structure as in the first embodiment. The holding piece 20 includes an upper piece 22, an inner vertical piece 23, a bent portion 24, an outer vertical piece 25, a vertical convex strip 26, a vertical concave shape 27, and a drawer piece 28. The holding piece 20 is put on the optical connector 34 from above, and is inserted into the circumferential groove 3 between the inner ring portion 6 and the outer edge portion 5. The vertical ridges 26 on the inner side of the holding piece 20 are fitted into inner arc grooves 43 provided at regular intervals on the inner ring outer periphery 38. The vertical ridge 26 on the outer side of the holding piece 20 is fitted into the outer arc groove 44 on the inner periphery 39 of the outer edge. The optical connector is fixed by fitting the vertical ridge 26 with the inner and outer arc grooves 43 and 44. By doing so, the position of the optical connector 34 does not move.

[Example 3 (fixing optical connector with holding piece pushed in from below)]
In the first and second embodiments, a holding piece that temporarily covers the optical connector and elastically holds the optical connector is used. The holding piece may be configured to hold the optical connector by pushing the optical connector from below. Also, the vertical ridges can be omitted. Still, the optical connector can be held in place by the elasticity of the holding piece and the outer case.

  The overall view is similar to that of the second embodiment, and will be omitted. FIG. 8 shows a state in which the optical connector 34 is temporarily fixed by the holding piece 60. The optical connector 34 is a round optical connector, but may be a square optical connector. The holding piece 60 opened on the upper side includes a lower curved gripping portion 63 and an opening tongue piece 62 continuing on the lower bending holding portion 63. The opening tongue 62 has its upper end folded slightly outward so that the optical connector 34 can be easily inserted. There is an opening above the holding piece 60. The optical connector 34 and the holding piece 60 are in close contact with each other on the lower side. There is no such thing as the inner and outer arc grooves 43 and 44. It can be simpler and less expensive.

  As shown in FIG. 6 of the second embodiment, the circumferential groove 3 in which the inner arc outer periphery 38 and the outer edge inner periphery 39 of the outer case 2 are provided with the inner arc groove 43 and the outer arc groove 44 having a uniform cross section in the height direction are provided vertically. You may have it. Of course.

  However, here, a description will be given of an optical fiber circulation groove having irregularities having a shape more suitable for the upper opening type holding piece 60. FIG. 9 is a partial perspective view of a state in which the optical connector with a holding piece is inserted and fixed in the circumferential groove 3. The inner ring outer periphery 38 and the outer edge inner periphery 39 on both sides of the circumferential groove 3 are not provided with unevenness in the cross section, but are provided with protrusions protruding deeper inward at the top. Inner conical grooves 46 are formed on the inner ring outer periphery 38 at regular intervals. Outer conical grooves 47 are formed on the inner periphery 39 of the outer edge at regular intervals. These have a large force for holding the optical connector because the gap is narrowed upward. The optical connector 34 is sandwiched between the holding pieces 60, and the opening tongue piece 62 is pressed narrowly and inserted between the inner ring outer periphery 38 and the outer edge inner periphery 39. Since there is elasticity, the opening tongue 62 opens. Although the opening tongue 62 opens obliquely, the optical conical groove 46 and the outer conical groove 47 prevent the optical connector from coming out upward. The positions of the holding piece 60 and the optical connector 34 in the circumferential groove are arbitrary. There is no problem even if the length of the optical fiber changes. It can be applied to optical modules having any length of optical fiber.

[Example 4 (in the case where no holding piece is used, inner and outer peripheral surfaces having irregularities)]
In the examples described so far, the optical connector is once sandwiched between elastic holding pieces and inserted into the circumferential groove 3 of the outer case 2 to be fixed. The holding piece is not essential. If the size of the optical connector is appropriately large, the optical connector can be directly inserted into the circumferential groove 3 and fixed. FIG. 10 shows such an embodiment. The left and right side surfaces of the optical connector 34 are sandwiched between an inner ring outer periphery 38 and an outer edge inner periphery 39. Since the outer arc groove 44 and the inner arc groove 43 limit the movement of the optical connector 34 in the circumferential direction, the optical connector 34 does not move easily due to vibration or impact. FIG. 15 shows such another embodiment. The left and right side surfaces of the optical connector 34 are sandwiched between an inner ring outer periphery 38 and an outer edge inner periphery 39. Since the outer circular arc column 48 and the inner circular arc column 45 limit the movement of the optical connector 34 in the circumferential direction, the optical connector 34 does not easily move due to vibration or impact.

[Example 5 (inner and outer peripheral surfaces having smooth surfaces when no holding piece is used)]
Even if there is no holding piece, the optical connector can be temporarily fixed directly in the circular groove 3 having the inner ring outer periphery 38 and the outer edge inner periphery 39 which are smooth surfaces like the outer case of FIGS. FIG. 11 shows such an example. The left and right side surfaces of the optical connector 34 are sandwiched between a smooth inner ring outer periphery 38 and an outer edge inner periphery 39.

[Example 6 (in the case where the holding piece is not used, the optical connector has a convex shape)]
The optical connector 34 has protrusions 68 and 69 on the left and right side surfaces. Then, even if there is no holding piece, the protrusions 68 and 69 are inserted into the inner ring outer periphery 38 of the circular groove 3, the inner arc groove 43 of the outer edge inner periphery 39, and the outer arc groove 44 to prevent the optical connector from slipping in the circumferential direction. be able to. FIG. 12 shows such an example.

[Example 7 (When the holding piece is not used, the optical connector has a concave shape)]
The optical connector has recesses 70 and 72 on the left and right sides. Then, even if there is no holding piece, slipping in the circumferential direction of the optical connector is prevented by inserting the recesses 70 and 72 into the inner ring outer periphery 38 of the circular groove 3, the inner arc column 45 and the outer arc column 48 of the outer edge inner periphery 39. be able to. FIG. 14 shows such an example.

  Although the embodiments and examples of the present invention have been described above, the embodiments and examples of the present invention disclosed above are merely examples, and the scope of the present invention is the implementation of these inventions. It is not limited to the form. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

The top view which shows the state just before pushing the optical connector with a holding piece of Example 1 which attached the holding piece to the optical connector and was fixed to the smooth surrounding groove of an outer case in the surrounding groove.

The perspective view of the outer case of Example 1 in which the surrounding groove which should fix an optical connector has a smooth inner ring | wheel outer periphery and outer periphery inner periphery.

The perspective view of the state which inserted the optical element case of the optical module in the cross-shaped recessed part of the inner case.

The top view of the whole case of the state which inserted the inner case in the center recessed part of the outer case in Example 1, and wound the optical fiber around the inner ring outer periphery 38, and attached the holding piece to the optical connector and pushed it into the circumferential groove.

The top view of the state which accommodated the optical module in the case of Example 2 which has the outer case where the circular-arc-shaped recessed part was vertically formed in the inner ring | wheel outer periphery and outer edge inner periphery of the circumference groove which should fix an optical connector.

The perspective view of the outer case of Example 2 by which the circular-arc-shaped recessed part was vertically formed in the inner ring | wheel outer periphery and outer edge inner periphery of the circumference groove which should fix an optical connector.

The top view of the outer case of Example 2 by which the circular-arc-shaped recessed part was vertically formed in the inner ring | wheel outer periphery and outer edge inner periphery of a circulation groove | channel.

The perspective view which shows the combination of the holding piece of Example 3 and the optical connector which hold | maintained the optical connector with the holding piece inserted from the bottom to the top, and was inserted | pinched between the surrounding grooves of the outer case.

The perspective view of the state which hold | maintained the optical connector with the holding piece inserted from the bottom to the top in Example 3, and was pinched | interposed into the circulation groove | channel of an outer case.

The perspective view of Example 4 which was made to push and fix an optical connector directly to the surrounding groove | channel with the unevenness | corrugation of an outer case, without using a holding piece.

The perspective view of Example 4 which was made to push and fix an optical connector directly to the circulation groove | channel of the smooth surface of an outer case, without using a holding piece.

FIG. 9 is an overall plan view of Example 5 in which an optical connector having a ridge without using a holding piece is directly pushed into a concave and convex circumferential groove of an outer case and fixed.

The perspective view which shows the state which laminated | stacked what accommodated the optical module in the case vertically.

FIG. 10 is an overall plan view of Example 6 in which an optical connector having a concave line without using a holding piece is directly pushed into a circumferential groove with an uneven surface of an outer case and fixed.

The perspective view of the other Example 4 which was made to push and fix an optical connector directly to the surrounding groove | channel with an unevenness | corrugation of an outer case, without using a holding piece.

Explanation of symbols

2 Outer case
3 Circulation groove
4 Center recess
5 outer edge
6 Inner ring
7 outer peripheral piece
8 Inner case
9 Through recess
10 Left recess
11 Rear recess
12 Right recess
13 Broken pieces
14 Lid
15 frames
20 Holding piece
22 Upper piece
23 Inner vertical piece
24 Folding Club
25 Outer vertical piece
26 Vertical ridges
27 opening
28 drawer pieces
30 Optical module
32 optical fiber
33 Optical element case
34 Optical connector
35 Chuko Element
36 Right light element
37 Left light element
38 Inner ring outer periphery
39 Outer edge inner circumference
40 Central inner wall
42 Finger hole
43 inner circular groove
44 Outer arc groove
45 Inner circular arc column 46 Inner conical groove
47 outer conical groove
48 Outer circular column 50 Vertical bent part
60 holding piece
62 Open tongue
63 Folding part
68 ridges
69 ridges
70 Concave 72 Concave

Claims (12)

A container for housing an optical module connecting an optical element case, an optical fiber, and an optical connector, and an inner case made of a plastic plate having conductivity in at least a part having a recess for accommodating the optical element case; A central recess for placing the inner case, and an outer case made of a plastic plate having an annular circumferential groove having a width substantially equal to the width of the optical connector formed to surround the central recess for winding the optical fiber, The optical element case is fitted into the inner case, the optical fiber is wound around the circular groove, the optical connector is sandwiched between the plastic holding plates, and the optical connector sandwiched between the holding plates is pushed into any position of the circular groove and fixed elastically. A packaging case characterized by that. The packaging case according to claim 1, wherein the holding plate is an overlying type that covers the optical connector from above and suppresses the optical connector, and has a circular arc groove extending in the vertical direction. The packing case according to claim 1, wherein the outer case has an inner ring portion and an outer edge portion sandwiching the circumferential groove, and an inner ring outer periphery and an outer edge inner periphery sandwiching the circumferential groove are smooth. The packing case according to claim 1 or 2, wherein an inner arc groove and an outer arc groove, which are unevenness in the vertical direction, are formed on the outer periphery of the inner ring and the inner periphery of the outer edge sandwiching the circumferential groove of the outer case. The packaging case according to claim 1, 3 or 4, wherein the holding plate is a suspended type that is fitted from the bottom to the top of the optical connector and has a smooth surface having no unevenness. A container for housing an optical module connecting an optical element case, an optical fiber, and an optical connector, and an inner case made of a plastic plate having conductivity in at least a part having a recess for accommodating the optical element case; A central recess for inserting the inner case, and an annular circumferential groove having a width substantially equal to the width of the optical connector formed so as to surround the central recess for winding the optical fiber, and an outer case made of a plastic plate. A packaging case characterized in that an optical element case is fitted into an inner case, an optical fiber is wound around a circular groove, and an optical connector is pushed into an arbitrary position of the circular groove to be elastically fixed. The packing case according to claim 6, wherein the outer case has an inner ring portion and an outer edge portion sandwiching the circumferential groove, and an inner ring outer periphery and an outer edge inner periphery sandwiching the circumferential groove are smooth. The packing case according to claim 6, wherein an inner circular arc groove and an outer circular arc groove, which are uneven in the vertical direction, are formed on the outer circumference of the inner ring and the inner circumference of the outer edge sandwiching the circumferential groove of the outer case. 9. The packaging case according to claim 8, wherein a convex strip that fits into the inner arc groove and the outer arc groove is provided on a side surface of the optical connector. The packing case according to claim 6, wherein an inner circular arc column and an outer circular arc column, which are uneven in the vertical direction, are formed on the outer periphery of the inner ring and the inner periphery of the outer edge sandwiching the circumferential groove of the outer case. The packing case according to claim 10, wherein a concave line that fits into the inner circular arc column and the outer circular arc column is provided on a side surface of the optical connector. The packaging case according to claim 1, wherein the concave portion for accommodating the optical element case of the inner case is a cross-shaped groove capable of accommodating a maximum of three optical elements.

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