AU2013203613A1

AU2013203613A1 - Optical fiber junction box

Info

Publication number: AU2013203613A1
Application number: AU2013203613A
Authority: AU
Inventors: Paul Hubbard; Liming Wang; Teller Xiao; Yanhong Yang
Original assignee: ADC Communications Australia Pty Ltd; Tyco Electronics Shanghai Co Ltd
Current assignee: Commscope Technologies Australia Pty Ltd; Commscope Telecommunications Shanghai Co Ltd
Priority date: 2012-05-03
Filing date: 2013-04-11
Publication date: 2013-11-21
Anticipated expiration: 2033-04-11
Also published as: CN103383484B; AU2013203613B2; NZ610120A; CN103383484A

Abstract

An optical fiber junction box, comprising: a housing; and a cutter provided on a rear side of the housing, when the housing is rotated about a central axis thereof, the cutter cuts a wall 5 and enters into the wall to embed the housing in the wall. Fig. nj 57 Fig.1

Description

- 1 OPTICAL FIBER JUNCTION BOX CROSS-REFERENCE TO RELATED APPLICATION 5 This application claims the benefit of Chinese Patent Application No. 201210135297.3 filed on May 3, 2012 in the State Intellectual Property Office of China, the whole disclosure of which is incorporated herein by reference. BACKGROUND OF THE INVENTION 10 Field of the Invention The present invention relates to an optical fiber junction box, more particularly, relates to an optical fiber junction box which is embeddable into a wall. Description of the Related Art 15 Since the conventional optical fiber junction box does not comprise any cutter or driller, a recess for receiving the optical fiber junction box must be pre-formed in a wall by a special cutter and a special driller before embedding the optical fiber junction box into the wall. Accordingly, the mounting of the conventional optical fiber junction box is complicated and time-consumed. 20 Furthermore, the pre-formed recess must be adapted to the optical fiber junction box to be embedded in size and shape, preferably, the recess may be slightly smaller than the optical fiber junction box to be embedded in size and shape so that the optical fiber junction box can be more stably embedded in the wall and cannot be readily disengaged from the wall. However, in the practice, it is difficult to form the recess to have an accurate size and shape. 25 Sometimes, the recess may be formed slightly larger than the optical fiber junction box, and the optical fiber junction box cannot be stably embedded in the wall and can be easily disengaged from the wall. Also, when the recess is formed far less than the optical fiber -2 junction box, the optical fiber junction box cannot be mounted in the recess. Accordingly, the mounting of the conventional optical fiber junction box must be operated by a special operator by means of the special cutter or driller, increasing the cost and time. 5 SUMMARY OF THE INVENTION The present invention has been made to overcome or alleviate at least one aspect of the above mentioned disadvantages. Accordingly, it is an object of the present invention to provide an optical fiber junction box which can be easily embedded into a wall without needing a special operator and a special 10 cutter or driller. According to an aspect of the present invention, there is provided an optical fiber junction box, comprising: a housing; and a cutter provided on a rear side of the housing, when the housing is rotated about a central axis thereof, the cutter cuts a wall and enters into the wall to embed the housing in the wall. 15 In an exemplary embodiment according to the present invention, the cutter and the housing are formed as one piece or separate members that are capable of being assembled together. In another exemplary embodiment according to the present invention, the optical fiber junction box further comprising a driller coaxially provided on the housing and facing the wall. When the housing is rotated about the central axis thereof, the driller drills the wall 20 and enters into the wall. In another exemplary embodiment according to the present invention, the driller and the housing are formed as one piece or separate members that are capable of being assembled together. In another exemplary embodiment according to the present invention, the optical fiber 25 junction box further comprising a plurality of spring locking tabs are configured to be a spring barb structure obliquely expanding from the cutter toward outside of the wall, -3 wherein the spring locking tabs are provided on the housing and embedded into the wall together with the cutter. In another exemplary embodiment according to the present invention, the spring locking tab and the housing are formed as one piece or separate members that are capable of being 5 assembled together. In another exemplary embodiment according to the present invention, the cutter, the spring locking tab and the driller are formed as one piece or separate members that are capable of being assembled together. In another exemplary embodiment according to the present invention, the cutter comprises 10 at least one cutting tooth and/or at least one projection. In another exemplary embodiment according to the present invention, the cutter comprises a plurality of cutting teeth arranged around a common circle. In another exemplary embodiment according to the present invention, the cutting teeth have a triangle shape, a rectangle shape of a tapered shape. 15 In another exemplary embodiment according to the present invention, the plurality of cutting teeth are formed around one circumferential edge of a disc plate; wherein the plurality of spring locking tabs are formed around the other circumferential edge of the disc plate opposite to the one circumferential edge; and wherein the driller is fixed on the center of the disc plate. 20 In another exemplary embodiment according to the present invention, the housing comprises a main body portion defining a chamber to receive an optical fiber tray therein. In another exemplary embodiment according to the present invention, the plurality of cutting teeth are formed around one circumferential edge of a disc plate; wherein the plurality of spring locking tabs are formed around the other circumferential edge of the disc plate 25 opposite to the one circumferential edge; and wherein the driller is centrally fixed on a bottom wall of the chamber of the main body portion.

-4 In another exemplary embodiment according to the present invention, the plurality of cutting teeth and the plurality of spring locking tabs are formed around an outer circumferential surface of the bottom of the chamber of the main body portion; and wherein the driller is centrally fixed on the bottom wall of the chamber of the main body portion. 5 In another exemplary embodiment according to the present invention, the one piece formed by the cutter, the spring locking tab and the driller is engaged to the bottom of the main body portion of the housing. In another exemplary embodiment according to the present invention, a driving shaft is provided in the chamber of the housing to be engaged with an output shaft of an electric drill 10 to drive the housing to rotate about the central axis. In another exemplary embodiment according to the present invention, a driving shaft and the housing are formed into one piece or separate members that are capable of being assembled together. In another exemplary embodiment according to the present invention, a plurality of radial 15 strengthening ribs are provided in the chamber of the housing. In another exemplary embodiment according to the present invention, the plurality of radial strengthening ribs are connected to the driving shaft and separately arranged around the driving shaft. In another exemplary embodiment according to the present invention, the optical fiber tray 20 comprises a first disc facing outside of the housing and a second disc opposite to the first disc; wherein the first disc is connected to the second disc by a constricted neck therebetween; and wherein a redundant optical fiber is wound on the constricted neck. In another exemplary embodiment according to the present invention, the optical fiber tray further comprises a central shaft sleeve slidably engaged on the driving shaft; and wherein 25 the central shaft sleeve is inserted into a central hole centrally formed in the optical fiber tray so that the optical fiber tray together with the central shaft sleeve can be slid along the -5 driving shaft. In another exemplary embodiment according to the present invention, a rotation stop structure is formed in the chamber of the housing; when the optical fiber tray together with the central shaft sleeve are slid to a first position inside the chamber of the housing, the 5 optical fiber tray is locked by the rotation stop structure so that the optical fiber tray cannot be rotated about the driving shaft; and when the optical fiber tray together with the central shaft sleeve are slid to a second position outside the chamber of the housing, the optical fiber tray is disengaged from the rotation stop structure so that the optical fiber tray can be rotated about the driving shaft. 10 In another exemplary embodiment according to the present invention, the optical fiber junction box further comprising a fiber adapter mounted on an outer surface of the first disc. In another exemplary embodiment according to the present invention, the optical fiber junction box further comprising a fiber guide mounted on the outer surface of the first disc to guide the fiber to the fiber adapter. 15 In another exemplary embodiment according to the present invention, the optical fiber junction box further comprising a cover, wherein a flat panel having an opening through which the optical fiber tray is received into the chamber is formed on the housing, and the cover is fitted on flat panel to close the opening. In another exemplary embodiment according to the present invention, at least one fixture for 20 fixing an optical cable or the fiber is formed on an outer surface of the flat panel of the housing. In another exemplary embodiment according to the present invention, a plurality of screw holes are formed in the flat panel of the housing to further fix the housing to the wall by means of screws. 25 In various exemplary embodiments of the present invention, since the optical fiber junction box has a cutter, the fiber junction box can be easily mounted in the wall only by rotating -6 the housing having the cutter. Furthermore, the optical fiber junction box can be automatically locked in the wall by a self-locking feature thereof. BRIEF DESCRIPTION OF THE DRAWINGS 5 The above and other features of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings, in which: Fig. 1 illustrates an exploded perspective view of an optical fiber junction box according to an exemplary embodiment of the present invention; 10 Fig.2 is a rear view of a housing of the optical fiber junction box of Fig. 1; Fig.3 is an exploded view of the housing of the optical fiber junction box of Fig.1; Fig.4 is an illustrative rear view of embedding the housing of the optical fiber junction box of Fig.l into a wall; Fig.5(a) is an illustrative perspective view of inserting an optical fiber tray to a first position 15 inside a chamber of the housing; Fig.5(b) is an illustrative perspective view of pulling the optical fiber tray to a second position outside the chamber of the housing; and Fig.6 is an illustrative perspective view of a housing of an optical fiber junction box according to another exemplary embodiment of the present invention. 20 DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE IVENTION Exemplary embodiments of the present disclosure will be described hereinafter in detail with reference to the attached drawings, wherein the like reference numerals refer to the like 25 elements. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiment set forth herein; rather, these -7 embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art. Fig. 1 illustrates an exploded perspective view of an optical fiber junction box according to an exemplary embodiment of the present invention; and Fig.2 is a rear view of a housing 50 5 of the optical fiber junction box of Fig.1. As shown in Figs. 1-2, the optical fiber junction box mainly comprises a housing 50, a cutter 51 provided on a rear side of the housing 50, and an optical fiber tray 20 received in the housing 50. Fig.4 is an illustrative rear view of embedding the housing 50 of the optical fiber junction 10 box of Fig.1 into a wall 60. As shown in Figs. 1-2, 4, when the housing 50 is rotated about a central axis thereof (which will be described in detail thereafter), the cutter 51 is driven to rotate together with the housing 50, cut the wall 60 and enter into the wall 60 , such that the housing 50 is embedded into the wall 60. 15 In the illustrative embodiment, the cutter 51 comprises a plurality of cutting teeth arranged around a common circle about the central axis. When the housing 50 is driven to rotate about the central axis, the cutting teeth are rotated about the central axis to cut the wall 60 and enter into the wall 60, such that the housing 50 is embedded into the wall 60. In the present invention, the cutter 51 is not limited to the cutting teeth, it may be a 20 projection having any shape as long as it can cut the wall 60. In the illustrative embodiments, the cutting teeth have a triangle shape, but the present invention is not limited to this, the cutting teeth may have a rectangle shape, a tapered shape or any other suitable shape. In the illustrative embodiments, since the housing 50 has a cutter 51 for cutting the wall, it 25 does not need to pre-form a recess adapted to the housing 50 in the wall 60 by a special cutter before embedding the optical fiber junction box into the wall 60. With such -8 configuration, the housing 50 of the present invention can be easily mounted in the wall 60. Fig.3 is an exploded view of the housing 50 of the optical fiber junction box of Fig.1, and Fig.4 is an illustrative rear view of embedding the housing of the optical fiber junction box of Fig.1 into the wall. 5 As shown in Fig.3, the plurality of cutting teeth 51 are formed around a first circumferential edge of a first side of a disc plate 59 and extend in an axis direction from the first circumferential edge of the disc plate 59. As shown in Figs. 1-4, the housing 50 further comprises a plurality of spring locking tabs 52. The plurality of spring locking tabs 52 are configured to be a spring barb structure obliquely 10 and outwardly expanding from a second circumferential edge of a second side, which is opposite to the first side, of the disc plate 59 with respect to the central axis . As shown in Fig.4, when the spring locking tabs 52 together with the cutting teeth 51 are embedded into the wall 60, the spring locking tabs 52 elastically press against an inner wall of a recess cut by the cutting teeth 51 in the wall 60 to stably lock the housing 50 in the wall 15 60. When the wall is thin, the spring locking tabs 52 may pass through the wall 60 and elastically press against a back side of the wall 60. Please refer to Figs.3-4, the plurality of spring locking tabs 52 are formed around the second circumferential edge of the disc plate 59 opposite to the plurality of the cutting teeth 51. The plurality of spring locking tabs 52 are connected to the second circumferential edge of the 20 disc plate 59. Referring to Fig.s2-4, the housing 50 further comprises a driller 53 coaxially provided on the housing 50. The driller 53 is fixed on the center of the disc plate 59 and extending parallel to the axis direction from the first side of the disc plate. When the housing 50 is rotated about the central axis, the driller 53 is rotated together with the housing 50 and drills 25 into the wall 60. In the present invention, the driller 53 may function as a position shaft to ensure the cutting -9 teeth 51to rotate about the central axis and perpendicular to the wall 60 without offsetting from the central axis. In the illustrative embodiments, the cutter 51, the spring locking tab 52 and the driller 53 are formed into one piece. But the present invention is not limited to this, the cutter 51, the 5 spring locking tab 52 and the driller 53 may be formed into three separate members that are capable of being assembled together. As shown in Figs. 1-4, the housing 50 comprises a cylindrical main body portion 57 which defines a chamber 571 for receiving the optical fiber tray 20 therein. As shown in Figs.2-3, the one piece formed by the cutter 51, the spring locking tab 52 and 10 the driller 53 may be engaged to the bottom of the main body portion 57 of the housing 50 in an interference fit manner. But the present invention is not limited to this, the cutter 51, the spring locking tab 52 and the driller 53 may be integrally formed with the main body portion 57 of the housing 50. Fig.6 is an illustrative perspective view of a housing 50 of an optical fiber junction box 15 according to another exemplary embodiment of the present invention. As shown in Fig.6, the plurality of cutting teeth 51 and the plurality of spring locking tabs (not shown) are formed around an outer circumferential surface of the bottom wall of the chamber 571 of the main body portion 57 in two opposite directions, and the driller 53 is centrally fixed on the bottom wall of the chamber 571 of the main body portion 57. In this 20 way, the disc plate 59 of Fig.3 is omitted. In the present invention, any one of the cutting teeth 51, the spring locking tab 52 and the driller 53 may be integrally formed with the housing 50 or formed into a separate member that can be assembled to the housing 50. Since a large cutting force may be generated when the cutter 51 of the housing 50 cuts the 25 wall 60, in a preferable embodiment of the present invention, a plurality of radial strengthening ribs 54 are provided in the chamber 571 of the housing 50 to prevent the main - 10 body portion 57 of the housing 50 from being deformed. As shown in Fig.1, a driving shaft 55 is provided in the chamber 571 of the housing 50 and constructed to be engaged with an output shaft of an electric drill, so that the housing 50 is driven to rotate about the central axis. The plurality of radial strengthening ribs 54 are 5 connected to the driving shaft 55 and separately arranged around the driving shaft 55 at an even angle interval to form a spoke strengthening structure. In the illustrative embodiments, the driving shaft 55 and the housing 50 are formed into one piece. But the present invention is not limited to this, the driving shaft may be a separate member that can be assembled to or disassembled from the housing 50. 10 Fig.5(b) is an illustrative perspective view of pulling the optical fiber tray 20 to a second position outside the chamber 571 of the housing 50. As shown in Figs. 1 and 5(b), the optical fiber tray 20 comprises a first disc 21 facing outside of the housing 50 and a second disc 22 opposite to the first disc 21. The first disc 21 is connected to the second disc 22 by a constricted neck 23 therebetween. A redundant optical 15 fiber is wound on the constricted neck 23, as shown in 5(b). As shown in Fig. 1, the optical fiber tray 20 further comprises a central shaft sleeve 40 slidably engaged on the driving shaft 55. A central hole is centrally formed in the optical fiber tray 20, and the central shaft sleeve 40 is inserted into the central hole so that the optical fiber tray 20 together with the central shaft sleeve 40 can be slid along the driving 20 shaft 55. Fig.5(a) is an illustrative perspective view of inserting the optical fiber tray 20 to a first position inside a chamber of the housing. Although it is not shown, a rotation stop structure is formed in the chamber 571 of the housing 50. 25 As shown in Fig.5(a), when the optical fiber tray 20 together with the central shaft sleeve 40 are slid to the first position inside the chamber 571 of the housing 50, the optical fiber tray - 11 20 is locked by the rotation stop structure of the housing 50 so that the optical fiber tray 20 cannot be rotated about the driving shaft 55. As shown in Fig.5(b), when the optical fiber tray 20 together with the central shaft sleeve 40 are slid to a second position outside the chamber 571 of the housing 50, the optical fiber tray 5 20 is disengaged from the rotation stop structure so that the optical fiber tray 20 can be rotated about the driving shaft 55. Accordingly, when it needs to wind the redundant optical fiber on the constricted neck 23 of the optical fiber tray 20, the operator may pull the optical fiber tray 20 to the second position outside the chamber 571 of the housing 50 as shown in Fig.5(b) to expose the constricted 10 neck 23 outside the chamber 571 of the housing 50, and then may easily wind the redundant optical fiber on the constricted neck 23. As shown in Fig. 1, the optical fiber junction box may further comprise a fiber adapter 30 mounted on an outer surface of the first disc 21. As shown in Fig. 1, the optical fiber junction box may further comprise a fiber guide 24 15 mounted on the outer surface of the first disc 21 to guide the fiber to the fiber adapter 30. In the illustrative embodiments, the fiber adapter 30 and the fiber guide 24 are disposed on the outer surface of the first disc 21, therefore, they can be easily accessed by the operator. In an exemplary embodiment of the present invention, as shown in Fig. 1, the optical fiber junction box may further comprise a cover 10. A flat panel 56 having an opening through 20 which the optical fiber tray 20 is received into the chamber 571 may be formed on the housing 50, and the cover 10 is fitted on the flat panel 56 to close the opening to protect from water and moisture. As shown in Fig.5(a), when the optical fiber tray 20 is fully inserted into the housing 50, the outer surface of the first disc 21 of the optical fiber tray 20 is substantially flush with the 25 outer surface of the flat panel 56 of the housing 50. In this way, the fiber or cable can be easily introduced into or led out of the housing 50.

- 12 As shown in Fig. 1, at least one fixture 58 for fixing the optical cable or fiber is formed on the outer surface of the flat panel 56 of the housing 50. Also, as shown in Fig. 1, a plurality of screw holes 561 are formed in the flat panel 56 of the housing 50 to further fix the housing 50 to the wall 60 by means of screws. But the screw 5 holes 561 may be omitted, because the housing 50 can be reliably locked in the wall 60 by the plurality of spring locking tabs 52. Although several exemplary embodiments have been shown and described, it would be appreciated by those skilled in the art that various changes or modifications may be made in these embodiments without departing from the principles and spirit of the disclosure, the 10 scope of which is defined in the claims and their equivalents. It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country. In the claims which follow and in the preceding description of the invention, except where 15 the context requires otherwise due to express language or necessary implication, the word "'comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention. 20

Claims

1. An optical fiber junction box, comprising: a housing (50); and 5 a cutter (51) provided on a rear side of the housing (50), the cutter (51) is constructed to cut a wall (60) and enter into the wall (60) when the housing (50) is driven to rotate about a central axis thereof, so that the housing (50) is embedded in the wall (60). 10

2. The optical fiber junction box according to claim 1, wherein the cutter (51) and the housing (50) are formed as one piece or separate members that are capable of being assembled together.

3. The optical fiber junction box according to claim 1, further comprising: 15 a driller (53) coaxially provided on the housing (50), when the housing (50) is driven to rotate about the central axis thereof, the driller (53) drills into the wall (60).

4. The optical fiber junction box according to claim 3, 20 wherein the driller (53) and the housing (50) are formed as one piece or two separate members that are capable of being assembled together.

5. The optical fiber junction box according to claim 3, further comprising: a plurality of spring locking tabs (52) configured to be a spring barb structure 25 obliquely and outwardly expanding with respect to the central axis, wherein the spring locking tabs (52) are provided on the housing (50) and embeddable - 14 into the wall (60) together with the cutter (51).

6. The optical fiber junction box according to claim 5, wherein the spring locking tab (52) and the housing (50) are formed into one piece or 5 two separate members that are capable of being assembled together.

7. The optical fiber junction box according to claim 6, wherein the cutter (51), the spring locking tab (52) and the driller (53) are formed as one piece or separate members that are capable of being assembled together. 10

8. The optical fiber junction box according to claim 7, wherein the cutter (51) comprises at least one cutting tooth and/or at least one projection.

9. The optical fiber junction box according to claim 8, wherein the cutter (51) comprises 15 a plurality of cutting teeth arranged around a common circle.

10. The optical fiber junction box according to claim 9, wherein the cutting teeth have a triangle shape, a rectangle shape of a tapered shape. 20

11. The optical fiber junction box according to claim 10, wherein the plurality of cutting teeth (51) are formed around a first circumferential edge of a first side of a disc plate (59); wherein the plurality of spring locking tabs (52) are formed around a second circumferential edge of a second side, which is opposite to the first side, of the disc plate 25 (59); and wherein the driller (53) is fixed on the center of the first side of the disc plate (59). - 15

12. The optical fiber junction box according to claim 10, wherein the housing (50) comprises a main body portion (57) defining a chamber (571) for receiving an optical fiber tray (20) therein. 5

13. The optical fiber junction box according to claim 12, wherein the plurality of cutting teeth (51) are formed around a first circumferential edge of a first side of a disc plate (59); wherein the plurality of spring locking tabs (52) are formed around a second 10 circumferential edge of a second side, which is opposite to the first side, of the disc plate (59); and wherein the driller (53) is centrally fixed on the first side of the disc plate.

14. The optical fiber junction box according to claim 12, 15 wherein the plurality of cutting teeth (51) and the plurality of spring locking tabs (52) are formed around an outer circumferential surface of a bottom wall of the chamber (571) of the main body portion (57) in two opposite directions; and wherein the driller (53) is centrally fixed on the bottom wall of the chamber (571) of the main body portion (57). 20

15. The optical fiber junction box according to claim 9, wherein the one piece formed by the cutter (51), the spring locking tab (52) and the driller (53) is engaged to the bottom wall of the main body portion (57) of the housing (50). 25

16. The optical fiber junction box according to claim 12, wherein a driving shaft (55) for engaging with an output shaft of an electric driver is - 16 centrally provided in the chamber (571) of the housing (50) to drive the housing (50) to rotate about the central axis.

17. The optical fiber junction box according to claim 16, 5 wherein the driving shaft (55) and the housing (50) are formed as one piece or two separate members that are capable of being assembled together.

18. The optical fiber junction box according to claim 16, wherein a plurality of radial strengthening ribs (54) are provided in the chamber (571) 10 of the housing (50).

19. The optical fiber junction box according to claim 18, wherein the plurality of radial strengthening ribs (54) are connected to the driving shaft (55) and separately arranged around the driving shaft (55). 15

20. The optical fiber junction box according to claim 12 or 19, wherein the optical fiber tray (20) comprises a first disc (21) facing outside and a second disc (22) opposite to the first disc (21); wherein the first disc (21) is connected to the second disc (22) by a constricted neck 20 (23) therebetween; and wherein a redundant optical fiber is wound on the constricted neck (23).

21. The optical fiber junction box according to claim 20, wherein the optical fiber tray (20) further comprises a central shaft sleeve (40) slidably 25 engaged on the driving shaft (55); and wherein the central shaft sleeve (40) is inserted into a central hole centrally formed in - 17 the optical fiber tray (20) so that the optical fiber tray (20) together with the central shaft sleeve (40) can be slid along the driving shaft (55).

22. The optical fiber junction box according to claim 21, 5 wherein a rotation stop structure is formed in the chamber (571) of the housing (50); when the optical fiber tray (20) together with the central shaft sleeve (40) are slid to a first position inside the chamber (571) of the housing (50), the optical fiber tray (20) is locked by the rotation stop structure so that the optical fiber tray (20) cannot be rotated about the driving shaft (55); and 10 when the optical fiber tray (20) together with the central shaft sleeve (40) are slid to a second position outside the chamber (571) of the housing (50), the optical fiber tray (20) is disengaged from the rotation stop structure so that the optical fiber tray (20) can be rotated about the driving shaft (55). 15

23. The optical fiber junction box according to claim 22, further comprising a fiber adapter (30) mounted on an outer surface of the first disc (21).

24. The optical fiber junction box according to claim 23, further comprising a fiber guide (24) mounted on the outer surface of the first disc (21) to guide the fiber to the fiber adapter 20 (30).

25. The optical fiber junction box according to claim 12 or 24, further comprising a cover (10), wherein a flat panel (56) having an opening through which the optical fiber tray (20) is 25 received into the chamber (571) is formed on the housing (50), and the cover (10) is fitted on the flat panel (56) to close the opening. - 18

26. The optical fiber junction box according to claim 25, wherein at least one fixture (58) for fixing an optical cable or the fiber is formed on an outer surface of the flat panel (56) of the housing (50). 5

27. The optical fiber junction box according to claim 26, wherein a plurality of screw holes (561) are formed in the flat panel (56) of the housing (50) to further fix the housing (50) to the wall (60) by means of screws.