Optical termination box

Abstract

To provide an optical termination box capable of easily removing an optical fiber cable.SOLUTION: An optical termination box includes a housing with plate-shaped outer panels and an elastic plate. The outer panel is divided into a first outer panel and a second outer panel. The first outer panel has a first outer opening. The second outer panel is detachably mounted on the first outer panel and has a second outer opening. The elastic plate is divided into a first elastic plate and a second elastic plate. The first elastic plate is attached to the first outer panel and has a first elastic opening and has the same shape as that of the first outer opening. The second elastic plate is attached to the second outer panel and has a second elastic opening that has the same shape as that of the second outer opening. A cable entry hole is formed when the first outer opening and the second outer opening are connected, and when the first elastic opening and the second elastic opening are connected.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to an optical termination box.

Background Art

[0002] Patent Document 1 discloses an optical termination box. An optical fiber cable is introduced into the inside of the optical termination box through a grommet. In the optical termination box of Patent Document 1, a grommet groove for fitting the grommet is formed in the front panel constituting the main body so that the grommet does not fall off from the main body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the optical termination box of Patent Document 1, once the grommet is fitted into the grommet groove, it is difficult to remove the grommet and the optical fiber cable passing through the grommet from the main body of the optical termination box. Further, the optical fiber cable can only access the inside of the optical termination box from the front panel in which the grommet groove is formed, and it is difficult to wire. Furthermore, when only the main body is replaced while leaving the components inside the optical termination box as they are, it is also necessary to cut the cable once. The same problems also exist when the optical fiber cable is introduced into the optical termination box through a connector or a cable introduction part instead of a grommet.

[0005] An object of the present disclosure is to provide an optical termination box in which an optical fiber cable can be easily removed.

Means for Solving the Problems

[0006] The optical termination box of the present disclosure is a housing having a plate-shaped outer panel, It includes an elastic plate part, The outer panel is divided into a first outer plate part and a second outer plate part, The first outer plate part has a first outer opening, The second outer plate part is detachably provided with respect to the first outer plate part and has a second outer opening, The elastic plate part is divided into a first elastic plate part and a second elastic plate part, The first elastic plate part is attached to the first outer plate part and has a first elastic opening having the same shape as the first outer opening, The second elastic plate part is attached to the second outer plate part and has a second elastic opening having the same shape as the second outer opening, When the first outer opening and the second outer opening are connected and the first elastic opening and the second elastic opening are connected, one cable introduction hole is formed.

Advantages of the Invention

[0007] According to the present disclosure, an optical termination box is provided in which an optical fiber cable can be easily removed.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0009] (Description of an embodiment of the present disclosure) First, embodiments of the present disclosure will be listed and described. An optical termination box according to an aspect of the present disclosure includes (1) a housing having a plate-shaped outer panel, and an elastic plate portion, the outer panel is divided into a first outer plate portion and a second outer plate portion, the first outer plate portion has a first outer opening, the second outer plate portion is detachably provided with respect to the first outer plate portion and has a second outer opening, the elastic plate portion is divided into a first elastic plate portion and a second elastic plate portion, the first elastic plate portion is attached to the first outer plate portion and has a first elastic opening having the same shape as the first outer opening, the second elastic plate portion is attached to the second outer plate portion and has a second elastic opening having the same shape as the second outer opening, when the first outer opening and the second outer opening are connected and the first elastic opening and the second elastic opening are connected, one cable introduction hole is formed.

[0010] According to the present disclosure, one cable introduction hole is formed by connecting the openings of the two divided plate portions. Therefore, it is easy to attach and detach the optical fiber cable from the housing. In addition, since there is an elastic plate portion, an optical termination box having high waterproof and dustproof properties can be realized.

[0011] (2) In the above (1), the first outer opening has a first outer arc portion, the second outer opening has a second outer arc portion having the same radius of curvature as the first outer arc portion, the central angle of the first outer arc portion and the central angle of the second outer arc portion are both 180 degrees or less, the first outer arc portion and the second outer arc portion may be convex in opposite directions.

[0012] According to the present disclosure, the first outer arc portion and the second outer arc portion have the same radius of curvature. The central angles of both the first outer arc portion and the second outer arc portion are 180 degrees or less. The first outer arc portion and the second outer arc portion are convex in opposite directions to each other. Therefore, it is easy to form a circular cable introduction hole. Accordingly, it is easy to grip the cable introduction portion having a circular shape in a cross-sectional view.

[0013] (3) In the above (2), the first outer arc portion and the second outer arc portion may each be a semi-circular arc.

[0014] According to the present disclosure, the arc portion, that is, the attachment portion of the cable introduction portion, is semi-divided. Therefore, it is easy to ensure the fixing strength of the cable introduction portion to the housing. Accordingly, it is easy to stably fix the cable introduction portion.

[0015] (4) In any one of the above (1) to (3), the outer panel may be semi-divided into the first outer plate portion and the second outer plate portion.

[0016] If the detachable second outer plate portion is too small, it is difficult to perform the attachment and detachment work of the cable introduction portion. In particular, if the length of the portion facing each other through the center on the inner circumference of the formed hole is less than the diameter of the circular cable introduction portion, the cable introduction portion cannot be attached and detached. Conversely, if the second outer plate portion is too large, the strength of the first outer plate portion is weak, and it is difficult to stably fix the cable introduction portion.

[0017] According to the present disclosure, the outer panel is semi-divided. Therefore, it is easy to ensure the strength of the first outer plate portion fixed to the housing. The handleability of the second outer plate portion detachable from the housing and the workability of attaching and detaching the cable introduction portion are improved. Accordingly, it is easy to stably fix the cable introduction portion.

[0018] (5) In any one of the above (1) to (4), the optical termination box further includes a plate-shaped inner panel, the inner panel is divided into a first inner plate portion and a second inner plate portion, The first inner plate portion has a first inner opening having the same shape as the first outer opening, The second inner plate portion has a second inner opening having the same shape as the second outer opening, By connecting the first inner opening and the second inner opening, the cable introduction hole is formed, The first elastic plate portion is sandwiched between the first outer plate portion and the first inner plate portion, The second elastic plate portion may be sandwiched between the second outer plate portion and the second inner plate portion.

[0019] According to the present disclosure, an elastic plate portion is sandwiched between the outer plate portion and the inner plate portion. Since the elastic plate portion fills the gap between the outer plate portion and the inner plate portion, high waterproofness and dustproofness can be achieved.

[0020] (Details of an embodiment of the present disclosure) A specific example of a light cable termination unit according to an embodiment of the present disclosure will be described with reference to the drawings. In the present embodiment, the "upward direction", "downward direction", "left direction", "right direction", "front direction", and "rear direction" are relative directions set for convenience of explanation with respect to the optical termination box 1 shown in FIG. 1. Note that the present disclosure is not limited to these examples, and is intended to be shown by the claims and to include all changes within the meaning and scope equivalent to the claims.

[0021] FIGS. 1 and 2 illustrate perspective views of an optical termination box according to an embodiment of the present disclosure. FIGS. 1 and 2 illustrate a state in which the front panel portion provided in front of the housing 10 is removed in order to show the inside of the optical termination box 1. As illustrated in FIGS. 1 and 2, the optical termination box 1 includes a housing 10 and a fusion tray 20. The optical termination box 1 may include a plurality of cable introduction portions 30 in addition to the housing 10 and the fusion tray 20. FIG. 1 illustrates a state in which the fusion tray 20 is housed inside the housing 10. FIG. 2 illustrates a state in which the fusion tray 20 is pulled forward from inside the housing 10.

[0022] The housing 10 has a substantially rectangular parallelepiped shape formed by combining a plurality of plate-like members. The plate-like members forming the outer surface of the housing 10 include a front panel portion (not shown), a rear panel portion 12, a left side panel portion 13, a right side panel portion 14, an upper panel portion 15, and a bottom panel portion 16. The front panel portion is provided so as to be openable and closable in the front direction of the housing 10. The plate-like members forming the outer surface of the housing 10 are provided such that adjacent plate portions are in contact with each other without any gaps. The material of the plate-like members constituting the outer surface of the housing 10 is, for example, metal or synthetic resin. The optical fusion terminal box 1 can be attached to a wall, a pillar, etc. such that the upper panel portion 15 of the housing 10 faces upward or such that a plurality of cable introduction portions 30 face downward. The bottom panel portion 16 is an example of an outer panel.

[0023] The fusion tray 20 is provided such that, for example, a part of the fixed portion to the housing 10 is foldable and can be stored inside the housing 10. The fusion tray 20 is configured to accommodate the connection portion between the optical fiber core wire of the optical fiber cable led from the outside to the inside of the housing 10 and the optical fiber core wire of another optical fiber cable provided inside the housing 10. For example, the first optical fiber cable led from the outside to the inside of the housing 10 through the first cable introduction portion among the plurality of cable introduction portions 30 is branched into optical fiber core wires inside the housing 10 and connected to the optical fiber core wire of a second optical fiber cable different from the first optical fiber cable. The second optical fiber cable may be led from the inside to the outside of the housing 10 through a second cable introduction portion different from the first cable introduction portion among the plurality of cable introduction portions 30. The use of the fusion tray 20 will be described later.

[0024] The plurality of cable introduction portions 30 may be provided on the bottom panel portion 16 of the housing 10. Each of the plurality of cable introduction portions 30 is configured to grip the optical fiber cable and introduce the optical fiber cable from the outside to the inside of the housing 10. The plurality of cable introduction portions 30 are arranged in a row along the arrangement direction D1. In the present embodiment, four cable introduction portions 30 are provided, but the number of cable introduction portions 30 is not limited to four.

[0025] Next, the details of the bottom plate portion 16 will be described. FIG. 3 illustrates an enlarged perspective view of the bottom plate portion 16. FIG. 3 illustrates a state in which a plurality of cable introduction portions 30 are removed from the housing 10 and a plurality of cable introduction holes 163 through which the cable introduction portions 30 are inserted are provided in the bottom plate portion 16 in order to show the bottom plate portion 16 in detail. As shown in FIG. 3, the bottom plate portion 16 is divided into a first outer plate portion 161 and a second outer plate portion 162.

[0026] The first outer plate portion 161 is adjacent to the rear plate portion 12, the left side plate portion 13, and the right side plate portion 14 of the housing 10 and is connected to these plate portions without a gap. The first outer plate portion 161 is fixed to the rear plate portion 12, the left side plate portion 13, and the right side plate portion 14. The first outer plate portion 161 includes a first outer opening 161O. In the present embodiment, four first outer openings 161O are provided in the first outer plate portion 161.

[0027] The second outer plate portion 162 is detachably provided with respect to the first outer plate portion 161. In other words, the second outer plate portion 162 is detachable not only with respect to the first outer plate portion 161 but also with respect to the left side plate portion 13 and the right side plate portion 14. The second outer plate portion 162 includes a second outer opening 162O.

[0028] The second outer opening 162O is provided so as to face the first outer opening 161O in the front-rear direction. In the present embodiment, when viewed from above or below, four second outer openings 162O are provided in the second outer plate portion 162 so as to face each of the four first outer openings 161O provided in the first outer plate portion 161 in the front-rear direction.

[0029] The first outer opening 161O has a first outer arc portion 161A. The second outer opening 162O has a second outer arc portion 162A.

[0030] The first outer arc portion 161A and the second outer arc portion 162A are convex in opposite directions on the same plane (on the bottom plate portion 16 in FIG. 3). Furthermore, the first outer arc portion 161A and the second outer arc portion 162A are convex in exactly opposite directions. In other words, when the center O1 of the first outer arc portion 161A and the center O2 of the second outer arc portion 162A both coincide on the same arrangement direction D1, in the direction perpendicular to the arrangement direction D1, the direction from the center O1 to the first outer arc portion 161A (the rear direction in FIG. 3) is opposite to the direction from the center O2 to the second outer arc portion 162A (the front direction in FIG. 3).

[0031] The radius of curvature of the second outer arc portion 162A is the same as that of the first outer arc portion 161A. In this embodiment, "the same" includes not only the case where they are exactly the same, but also the case where the difference between the two is sufficiently small and they are evaluated as substantially the same. For example, even if the radius of curvature of the first outer arc portion 161A is not the same as that of the second outer arc portion 162A, as will be described later, as long as a single hole is formed by connecting the first outer arc portion 161A and the corresponding second outer arc portion 162A, it is sufficient.

[0032] The central angle of the first outer arc portion 161A and the central angle of the second outer arc portion 162A are both 180 degrees or less. Also, the central angle of the first outer arc portion 161A and the central angle of the second outer arc portion 162A are both 120 degrees or more. The central angle of the first outer arc portion 161A and the central angle of the second outer arc portion 162A may both be 140 degrees or more.

[0033] One first outer opening 161O and one second outer opening 162O are configured to be connected to each other. More specifically, the first outer arc portion 161A of the first outer opening 161O and the second outer arc portion 162A of the second outer opening 162O facing the first outer opening 161O are configured to be connected on the same plane (on the bottom plate portion 16 in FIG. 3). In the present embodiment, "connected" means not only when one opening (arc portion) and another opening (arc portion) are in contact without a gap on the same plane, but also when there is a gap between one opening (arc portion) and another opening (arc portion), it includes the case where the two arcs face each other. In this way, by connecting the first outer opening 161O and the corresponding second outer opening 162O, one cable introduction hole 163 is formed.

[0034] FIG. 4 is an enlarged perspective view of the cable introduction hole 163 as viewed from the inside of the housing 10. FIG. 4 also illustrates a state in which a plurality of cable introduction portions 30 are removed from the housing 10. As shown in FIG. 4, the optical termination box 1 includes an elastic plate portion 40 in addition to the housing 10 and the fusion tray 20. The elastic plate portion 40 is divided into a first elastic plate portion 401 and a second elastic plate portion 402.

[0035] The first elastic plate portion 401 is detachably provided with respect to the first outer plate portion 161. In other words, the first elastic plate portion 401 is detachably provided not only with respect to the first outer plate portion 161, but also with respect to the rear plate portion 12, the left plate portion 13, and the right plate portion 14. Further, the first elastic plate portion 401 includes a first elastic opening 401O having a first elastic arc portion 401A. The first elastic opening 401O has the same shape as the first outer opening 161O. In the present embodiment, the "same shape" includes not only the case where the shapes are exactly the same, but also the case where the difference between the two is sufficiently small and they are evaluated as substantially the same. For example, even if the first elastic opening 401O does not have the same shape as the first outer opening 161O, it is sufficient that the gap of the cable introduction portion 30 with respect to the first outer opening 161O can be filled to such an extent that the waterproofness and dustproofness are not impaired. In the present embodiment, four first elastic openings 401O are provided in the first elastic plate portion 401. The number of the first elastic openings 401O is not limited to four, but is the same as the number of the first outer openings 161O.

[0036] The second elastic plate portion 402 is detachably provided with respect to the second outer plate portion 162. In other words, the second elastic plate portion 402 is detachably provided not only with respect to the second outer plate portion 162, but also with respect to the left plate portion 13 and the right plate portion 14. Further, the second elastic plate portion 402 includes a second elastic opening 402O having a second elastic arc portion 402A. The second elastic opening 402O has the same shape as the second outer opening 162O.

[0037] The second elastic opening 402O is provided so as to face the first elastic opening 401O in the front-rear direction. In the present embodiment, when viewed from above or below, four second elastic openings 402O are provided in the second elastic plate portion 402 so as to face each of the four first elastic openings 401O provided in the first elastic plate portion 401 in the front-rear direction.

[0038] The first elastic arc portion 401A and the second elastic arc portion 402A are convex in opposite directions on the same plane (on the bottom plate portion 16 in FIG. 4). Furthermore, the first elastic arc portion 401A and the second elastic arc portion 402A are convex in exactly opposite directions. In other words, when the center O11 of the first elastic arc portion 401A and the center O12 of the second elastic arc portion 402A both coincide on the same arrangement direction D1, in the direction perpendicular to the arrangement direction D1, the direction from the center O11 to the first elastic arc portion 401A (the rear direction in FIG. 4) is opposite to the direction from the center O12 to the second elastic arc portion 402A (the front direction in FIG. 4).

[0039] The radius of curvature of the second elastic arc portion 402A is the same as that of the first elastic arc portion 401A. The central angle of the first elastic arc portion 401A and the central angle of the second elastic arc portion 402A are both 180 degrees or less. Also, the central angle of the first elastic arc portion 401A and the central angle of the second elastic arc portion 402A are both 120 degrees or more. The central angle of the first elastic arc portion 401A and the central angle of the second elastic arc portion 402A may both be 140 degrees or more.

[0040] One first elastic opening 401O and one second elastic opening 402O are configured to be connected to each other. More specifically, the first elastic arc portion 401A of one first elastic opening 401O and the second elastic arc portion 402A of the second elastic opening 402O facing the first elastic opening 401O are configured to be connected on the same plane (on the bottom plate portion 16 in FIG. 4). In this way, when the first elastic opening 401O and the corresponding second elastic opening 402O are connected, one cable introduction hole 163 is formed.

[0041] Next, with reference to FIGS. 1, 2, and 5, the usage method of the optical termination box 1 will be described. First, the operator opens the front panel portion (not shown) of the housing 10 and pulls out the fusion tray 20 forward from the inside of the housing 10 (Fig. 2). At this time, the fusion tray 20 is pulled out of the housing 10 by the rotation of a part of the fixed portion with the housing 10, and its flat portion becomes parallel to the bottom plate portion 16. The optical termination box 1 can usually be attached to a wall or the like so that the upper panel portion 15 of the housing 10 faces upward. However, since the flat portion of the fusion tray 20 becomes parallel to the bottom plate portion 16 during the connection operation in this way, the operator can easily perform the storage operation of the connection portion without changing the orientation of the housing 10.

[0042] Furthermore, in this embodiment, the bottom plate portion 16 is divided into a first outer plate portion 161 and a second outer plate portion 162, and the second outer plate portion 162 is detachably provided with respect to the first outer plate portion 161. Therefore, the operator can remove the second outer plate portion 162 of the bottom plate portion 16 from the first outer plate portion 161. Similarly, the operator can remove the second elastic plate portion 402 from the first outer plate portion 161.

[0043] Fig. 5 illustrates a state in which the second outer plate portion 162 and the second elastic plate portion 402 are removed from the first outer plate portion 161. As shown in Fig. 5, the operator can remove the plurality of cable introduction portions 30 together with the optical fiber cable from the housing 10 while gripping the optical fiber cable at the plurality of cable introduction portions 30 by removing the second outer plate portion 162 of the bottom plate portion 16 and the second elastic plate portion 402 of the elastic plate portion 40 from the first outer plate portion 161 of the bottom plate portion 16.

[0044] If the bottom plate portion 16 is not divided into a plurality of plate portions, the operator needs to extract or cut the long optical fiber cable from the plurality of cable introduction portions 30. However, according to this embodiment, since the optical fiber cable is easier to handle, the working efficiency can be improved.

[0045] After the operator connects the optical fiber cable, the second outer plate portion 162 and the second elastic plate portion 402 are attached to the first outer plate portion 161. At this time, the second outer opening 162O corresponding to the first outer opening 161O is connected, and the second elastic opening 402O corresponding to the first elastic opening 401O is connected, thereby forming one cable introduction hole 163, and the cable introduction portion 30 can be gripped (FIG. 2). Further, the operator houses the fusion tray 20 inside the housing 10 (FIG. 1).

[0046] As described above, according to the present embodiment, the bottom plate portion 16 is divided into the first outer plate portion 161 and the second outer plate portion, and the first outer opening 161O of the divided first outer plate portion 161 and the second outer opening 162O of the divided second outer plate portion 162 are connected, thereby forming one cable introduction hole 163. Therefore, it is easy to attach and detach the cable introduction portion 30 together with the optical fiber cable from the housing 10. Further, since the elastic plate portion 40 is provided, the optical termination box 1 having high waterproof and dustproof properties can be realized.

[0047] Furthermore, in the present embodiment, the first outer arc portion 161A and the second outer arc portion 162A have the same radius of curvature. The central angle of the first outer arc portion 161A and the central angle of the second outer arc portion 162A are both 180 degrees or less. The first outer arc portion 161A and the second outer arc portion 162A are convex in opposite directions on the same plane. Therefore, it is easy to form a circular cable introduction hole 163, and it is easy to grip the cable introduction portion 30 having a circular shape in a cross-sectional view.

[0048] Note that the first outer arc portion 161A and the second outer arc portion 162A may each be a semi-circular arc. In this case, the central angle of the first outer arc portion 161A and the central angle of the second outer arc portion 162A are both 180 degrees. According to such a configuration, the arc portions of each arc portion, that is, the attachment portions of the cable introduction portion are semi-divided. Therefore, it is easy to ensure the fixing strength of the cable introduction portion to the housing 10. Therefore, it is easy to stably fix the cable introduction portion.

[0049] The bottom panel portion 16 may be split in half into a first outer panel portion 161 and a second outer panel portion 162 along the arrangement direction D1 of the plurality of cable introduction portions 30. In the present embodiment, "split in half" includes not only the case where the two split panel portions are exactly the same shape, but also the case where the difference between the two is small enough to be evaluated as substantially the same. For example, in a direction perpendicular to the arrangement direction D1, if the length of the line segment from the center O1 to the first outer arc portion 161A is the same as the length of the line segment from the center O2 to the second outer arc portion 162A (FIG. 3), the length of the split panel portions in the front-rear direction does not have to be the same.

[0050] If the detachable second outer panel portion 162 is too small, it is difficult to perform the attachment / detachment operation of the cable introduction portion 30. In particular, if the length of the portion of the formed cable introduction hole that faces through the center on the inner periphery is less than the diameter of the circular cable introduction portion 30, the cable introduction portion 30 cannot be attached / detached. Conversely, if the second outer panel portion 162 is too large, the strength of the first outer panel portion 161 is weak, and it is difficult to stably fix the cable introduction portion 30. In contrast, when the bottom panel portion 16 is split in half, it is easy to ensure the strength of the first outer panel portion 161 of the housing 10. Furthermore, the handleability of the second outer panel portion 162 that is detached from the housing 10 and the workability of attaching / detaching the cable introduction portion 30 are improved, and it is easy to stably fix the cable introduction portion 30.

[0051] The housing 10 may further include a plate-shaped inner panel 17 (FIG. 2). The inner panel 17 is provided to face the bottom panel portion 16 that forms the outer surface of the housing 10 via the elastic plate portion 40. In other words, the elastic plate portion 40 is provided so as to be sandwiched between the bottom panel portion 16 and the inner panel 17.

[0052] FIG. 6 illustrates an enlarged perspective view of the inner panel 17 as seen from inside the housing 10. FIG. 6 illustrates a state in which the plurality of cable introduction portions 30 have been removed from the housing 10 in order to show the inner panel 17 in detail.

[0053] As shown in FIG. 6, the inner panel 17 is divided into a first inner plate portion 171 and a second inner plate portion 172. The first inner plate portion 171 is detachably provided with respect to the first outer plate portion 161. The first inner plate portion 171 includes a first inner opening 171O having a first inner arc portion 171A. The first inner opening 171O has the same shape as the first outer opening 161O. In FIG. 6, four first inner openings 171O are provided in the first inner plate portion 171. The number of the first inner openings 171O is not limited to four, but is the same as the number of the first outer openings 161O.

[0054] The second inner plate portion 172 is detachably provided with respect to the first inner plate portion 171. The second inner plate portion 172 includes a second inner opening 172O having a second inner arc portion 172A. The second inner opening 172O has the same shape as the second outer opening 162O.

[0055] The second inner opening 172O is provided so as to face the first inner opening 171O in the front-rear direction. In the present embodiment, when viewed from above or below, four second inner openings 172O are provided in the second inner plate portion 172 so as to face each of the four first inner openings 171O provided in the first inner plate portion 171 in the front-rear direction.

[0056] The first inner arc portion 171A and the second inner arc portion 172A are convex in opposite directions on the same plane (on the bottom plate portion 16 in FIG. 6). Furthermore, the first inner arc portion 171A and the second inner arc portion 172A are convex in exactly opposite directions. In other words, when the center O21 of the first inner arc portion 171A and the center O22 of the second inner arc portion 172A both coincide on the same arrangement direction D1, in the direction perpendicular to the arrangement direction D1, the direction from the center O21 to the first inner arc portion 171A (the rear direction in FIG. 6) is the opposite direction to the direction from the center O22 to the second inner arc portion 172A (the front direction in FIG. 6).

[0057] The radius of curvature of the second inner arc portion 172A is the same as that of the first inner arc portion 171A. The central angles of both the first inner arc portion 171A and the second inner arc portion 172A are 180 degrees or less. Also, the central angles of both the first inner arc portion 171A and the second inner arc portion 172A are 120 degrees or more. The central angles of both the first inner arc portion 171A and the second inner arc portion 172A may be 140 degrees or more.

[0058] One first inner opening 171O and one second inner opening 172O are configured to be connected to each other. More specifically, the first inner arc portion 171A of one first inner opening 171O and the second inner arc portion 172A of the second inner opening 172O facing the first inner opening 171O are configured to be connected on the same plane (on the bottom plate portion 16 in FIG. 6). In this way, by connecting the first inner opening 171O and the corresponding second inner opening 172O, one cable introduction hole 163 is formed.

[0059] The first elastic plate portion 401 is sandwiched between the first outer plate portion 161 and the first inner plate portion 171. The first elastic plate portion 401 is fixed by the first outer plate portion 161 and the first inner plate portion 171. The gap between the first outer plate portion 161 and the first inner plate portion 171 is filled by the first elastic plate portion 401. Therefore, high waterproofness and high dustproofness can be achieved. Similarly, the second elastic plate portion 402 is sandwiched between the second outer plate portion 162 and the second inner plate portion 172. The second elastic plate portion 402 is fixed by the second outer plate portion 162 and the second inner plate portion 172. The gap between the second outer plate portion 162 and the second inner plate portion 172 is filled by the second elastic plate portion 402. Therefore, high waterproofness and high dustproofness can be achieved.

Description of Reference Numerals

[0060] 1 Optical termination box 10 Housing 12 Rear plate portion 13 Left side plate portion 14 Right side plate portion 15 Upper plate portion 16 Bottom panel part 161 First outer panel part 161A First outer arc part 161O First outer opening 162 Second outer panel part 162A Second outer arc part 162O Second outer opening 163 Cable introduction hole 17 Inner panel 171 First inner panel part 171A First inner arc part 171O First inner opening 172 Second inner panel part 172A Second inner arc part 172O Second inner opening 20 Fusing tray 30 Cable introduction part 40 Elastic plate part 401 First elastic plate part 401A First elastic arc part 401O First elastic opening 402 Second elastic plate part 402A Second elastic arc part 402O Second elastic opening D1 Arrangement direction O1, O2, O11, O12, O21, O22 Centers

Claims

1. A housing having a plate-shaped outer panel, and an elastic plate portion, The outer panel is divided into a first outer plate portion and a second outer plate portion, The first outer plate portion has a first outer opening, The second outer plate portion is detachably provided with respect to the first outer plate portion and has a second outer opening, The elastic plate portion is divided into a first elastic plate portion and a second elastic plate portion, The first elastic plate portion is attached to the first outer plate portion and has a first elastic opening having the same shape as the first outer opening, The second elastic plate portion is attached to the second outer plate portion and has a second elastic opening having the same shape as the second outer opening, An optical termination box in which the first outer opening and the second outer opening are connected, and the first elastic opening and the second elastic opening are connected to form a single cable introduction hole.

2. The first outer opening has a first outer arc portion, The second outer opening has a second outer arc portion having the same radius of curvature as the first outer arc portion, The central angle of the first outer arc portion and the central angle of the second outer arc portion are both 180 degrees or less, The optical termination box according to claim 1, wherein the first outer arc portion and the second outer arc portion are convex in opposite directions.

3. The optical termination box according to claim 2, wherein the first outer arc portion and the second outer arc portion are each a semi-circular arc.

4. The optical termination box according to any one of claims 1 to 3, wherein the outer panel is halved into the first outer plate portion and the second outer plate portion.

5. Further comprising a plate-shaped inner panel, The inner panel is divided into a first inner plate portion and a second inner plate portion, The first inner plate portion has a first inner opening that is the same shape as the first outer opening, The second inner plate portion has a second inner opening that is the same shape as the second outer opening, The cable introduction hole is formed by connecting the first inner opening and the second inner opening, The first elastic plate portion is sandwiched between the first outer plate portion and the first inner plate portion, The second elastic plate portion is sandwiched between the second outer plate portion and the second inner plate portion. The optical termination box according to any one of claims 1 to 3.

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