Multi-layer fiber optic box

Abstract

A multi-layer optical fiber box includes an outer shell, the outer shell includes side panels located on the left and right sides, and a top plate and a bottom plate located on the top of the outer shell and extending between the two side panels. A front door is installed on the front side of the outer shell, and the front door can move between a closed position and an open position. A rear door is installed on the rear side of the outer shell, and the rear door can move between a closed position and an open position. A transfer box mounting frame is installed on the bottom plate, and the transfer box mounting frame includes: a plurality of transfer box mounting columns and a first reinforcing beam, the transfer box mounting columns extend vertically in the up-down direction, and the first reinforcing beam extends in the horizontal direction at the middle position between the top and the bottom of the transfer box mounting frame. The height of the transfer box mounting column is 4RU height or greater, so that four or more layers of optical fiber transfer boxes stacked in the up-down direction can be installed on the transfer box mounting frame. The outer shell of the optical fiber box can be made of a 1.5mm thick cold-rolled steel plate, and the outer surface is electrostatically powder-sprayed. The structure of the optical fiber box achieves sufficient strength.

Description

Technical Field

[0001] The utility model relates to the field of electrical equipment, in particular to an optical fiber box used in occasions such as a data center, an electrical cabinet and the like. In particular, the optical fiber box is a multi-layer type. Background Art

[0002] Fiber optic boxes are widely used in the fields of electrical equipment, data centers, etc., for wiring management of cables such as optical fibers, so that the optical fibers can be arranged in an orderly manner to prevent interference and entanglement between the optical fibers. At least one, usually multiple, fiber optic transfer boxes can be installed in the fiber optic box, and the optical fibers are connected to the fiber optic transfer boxes. The fiber optic box with the fiber optic transfer box installed can be fixed on a frame structure such as an equipment cabinet or an equipment mounting rack.

[0003] In existing fiber optic boxes, the height is usually set to accommodate a standard-sized fiber optic transfer box, which is also called 1RU height in the art. Alternatively, in order to increase the capacity of the fiber optic box so that it can accommodate more fiber optic transfer boxes, in addition to expanding the width of the fiber optic box, a fiber optic box with a 2RU height is also proposed, and two standard-sized fiber optic transfer boxes can be stacked in the vertical direction.

[0004] However, further increasing the height of the fiber optic box will encounter some difficulties. First, stacking multiple fiber optic transfer boxes together will place higher requirements on the strength of the installation structure connecting the fiber optic transfer boxes. Second, as the number of fiber optic transfer boxes installed in the fiber optic box increases, the operating space will be limited when maintaining and organizing the fiber optic transfer boxes and optical fibers, and the operation will become complicated.

[0005] Therefore, in the prior art, there is a need to further improve the structure of the optical fiber box to overcome at least one of the problems existing in the prior art mentioned above. Utility Model Content

[0006] The utility model is made to solve the technical problems existing in the above-mentioned prior art. The purpose of the utility model is to provide a fiber optic box with a novel structure, which has sufficient strength to allow at least four or more fiber optic transfer boxes stacked in a vertical direction to be installed in the fiber optic box. Furthermore, the structure of the fiber optic box also allows for convenient wiring, maintenance and other operations on multiple fiber optic transfer boxes and optical fibers installed therein.

[0007] The optical fiber box of the utility model comprises an outer shell, the outer shell comprises side panels located on the left and right sides, and a top plate and a bottom plate located on the top of the outer shell and extending between the two side panels, a front door is installed on the front side of the outer shell, and the front door can move between a closed position and an open position, and a rear door is installed on the rear side of the outer shell, and the rear door can move between a closed position and an open position. Wherein, a transfer box mounting frame is installed on the bottom plate, and the transfer box mounting frame comprises: a plurality of transfer box mounting columns, the transfer box mounting columns vertically extending in the up-down direction, and the distance between two adjacent transfer box mounting columns is equal to 1RU width; and at least one first reinforcing crossbeam, the first reinforcing crossbeam is located at the middle position between the top and the bottom of the transfer box mounting frame, and extends perpendicularly to the transfer box mounting columns in the horizontal direction, so as to form a plurality of optical fiber transfer box jacks in the transfer box mounting frame; wherein, the height of the transfer box mounting columns is a height of 4RU or greater, so that four or more layers of optical fiber transfer boxes stacked in the up-down direction can be installed on the transfer box mounting frame.

[0008] The structure of the optical fiber box can achieve sufficient strength to be used for installing and supporting four or more stacked optical fiber switching boxes.

[0009] Preferably, the adapter box mounting frame further comprises a second reinforcing crossbeam, and the second reinforcing crossbeam extends in a horizontal direction at the top of the adapter box mounting frame.

[0010] In a specific exemplary configuration, the height of the housing and the height of the adapter box mounting bracket are 4RU height.

[0011] Preferably, the multi-layer optical fiber box further comprises a drawer, which is movably accommodated in the housing, and the bottom of the drawer serves as the bottom plate of the housing. The drawer can be drawn outward relative to the box, thereby allowing the optical fiber switching box and related optical fibers installed therein to be conveniently inspected and maintained.

[0012] Preferably, the multi-layer optical fiber box further comprises guide rails arranged on both sides of the drawer, the guide rails being mounted on the lower side of the side plate of the housing and slidably matched with the side edge of the drawer. The structure of the guide rails allows the drawer to be easily pulled out for maintenance.

[0013] In a specific structure, two rows of fiber optic transfer box jacks are formed in the transfer box mounting frame, each row includes four fiber optic transfer box jacks, and the height of each fiber optic transfer box jack is 2RU. Therefore, up to sixteen fiber optic transfer boxes can be accommodated in the fiber optic box, each fiber optic transfer box can have 24 fiber cores, so that a total of 384 fiber cores can be provided.

[0014] Preferably, both ends of the bottom edge of the front door are pivotally connected to the front end side of the bottom plate through a first connecting member, and the first connecting member is configured to allow the front door to rotate a maximum of 180° from the closed position of the front door around a pivot axis defined by the first connecting member. This rotation angle can effectively prevent the operator from being disturbed by the front door during maintenance.

[0015] Further preferably, the rear door is pivotally connected to the rear end of the housing through a second connecting member, and the second connecting member is configured to allow the rear door to rotate up to 90° from the closed position of the rear door around the pivot axis defined by the second connecting member. The arrangement of the rear door provides a passage from the rear side into the interior of the optical fiber box for inspecting the optical fiber switching box and related optical fibers therein, thereby further facilitating the inspection and maintenance operations of the operator. In addition, the maximum 90° pivoting range can prevent the operator from being disturbed by the rear door during operation.

[0016] Preferably, at least one of the first connecting member and the second connecting member is a rivet. Rivets can achieve a quick and firm connection.

[0017] Preferably, optical fiber clamp mounting columns are respectively provided on both sides of the front end of the bottom plate, and a plurality of optical fiber clamps are fixedly connected to the optical fiber clamp mounting columns, and the number of optical fiber clamps is the same as the number of layers of the optical fiber adapter box. In addition, a front door latch is provided on the front door, and a latch matching frame is provided on the top of the optical fiber clamp mounting column, and when the front door is in the closed position of the front door, the front door latch is locked and matched with the latch matching frame.

[0018] Preferably, a box mounting frame is mounted on the side panel, and the box mounting frame is configured to be adjustable in position along the front-rear direction, and the adjustment range of the box mounting frame is between 10 and 70 mm. Preferably, the adjustment range can be between 20 and 50 mm, and more specifically can be 50 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific implementation of the present utility model can be more clearly understood from the structure shown in the accompanying drawings, wherein:

[0020] Figure 1 A perspective view of a fiber optic box of the present application is shown, wherein the front door of the fiber optic box is closed.

[0021] Figure 2 Shows Figure 1 A partially exploded stereoscopic view of a fiber optic box, wherein the front door and the rear door of the fiber optic box are in an open state, and the internal structure of the fiber optic box is shown.

[0022] Figure 3 Shows Figure 1 Another perspective view of a fiber optic box, wherein the front door is open, revealing multiple fiber optic switching boxes installed in the fiber optic box.

[0023] (Explanation of symbols)

[0024] 100 fiber optic box

[0025] 110 Shell

[0026] 111 Top Plate

[0027] 112 side panels

[0028] 113 cabinet mounting bracket

[0029] 114 Mounting frame connection mechanism

[0030] 115 wiring hole

[0031] 116 Fiber Optic Binding Bracket

[0032] 120 Front Door

[0033] 121 front door latch

[0034] 122 first connecting piece

[0035] 123 Latch Mating Bracket

[0036] 124 manhole

[0037] 125 Spring lock pin

[0038] 130 Backdoor

[0039] 131 Pull Pin

[0040] 132 second connecting piece

[0041] 140 Pull-out section

[0042] 141 Guide Rail

[0043] 150 adapter box mounting bracket

[0044] 151 adapter box installation column

[0045] 152 Strengthening beam

[0046] 153 Fiber Optic Switch Box Jack

[0047] 160 Fiber Clamp

[0048] 161 Fiber Clamp Mounting Post

[0049] 200 fiber optic switch box DETAILED DESCRIPTION

[0050] In order to facilitate the understanding of the present invention, the specific implementation of the optical fiber box structure of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the drawings are only preferred embodiments of the present invention, which should not be construed as limiting the scope of the present invention. Those skilled in the art can make various obvious modifications, variations, and equivalent substitutions to the present invention based on the embodiments shown in the drawings, and the technical features of the different embodiments described below can be arbitrarily combined with each other without contradiction, and these all fall within the scope of the present invention.

[0051] In the following specific description of the present invention, the terms used to indicate directions and orientations, such as "upper", "lower", "left", "right", "front", "rear", etc., are based on the normal orientation of the structure shown in the figure during use. It should be understood that the orientation of the structure may also change according to the specific application occasion.

[0052] Figure 1 A perspective view of a fiber optic box 100 of the present application is shown, wherein the fiber optic box 100 is shown to have a height of 4RU. Figure 2 A partially exploded view of the fiber optic cabinet 100 is shown.

[0053] The optical fiber box 100 has an outer shell 110, and an inner space is formed in the outer shell 110 for accommodating the optical fiber switching box. The outer shell 110 includes a top plate 111 and two side plates 112 located on both sides thereof, and the top plate 111 extends between the two side plates 112. Preferably, the outer shell 110 is made of a cold-rolled steel plate with a thickness of 1.5 mm, for example, to provide the required strength, and more preferably, an electrostatic powder spraying treatment may be performed on the outer surface of the outer shell 110.

[0054] A box mounting frame 113 is connected to the side panel 112, and the fiber box 100 can be fixedly mounted on a frame structure such as a cabinet, an equipment mounting frame, etc. through the box mounting frame 113. The box mounting frame 113 is fixedly connected to the side panel 112 through a mounting frame connecting mechanism 114. Preferably, the box mounting frame 113 extends substantially the entire height of the housing 110 from the top plate 111 of the fiber box 100 to the bottom thereof, or the box mounting frame 113 has a height of 4RU.

[0055] In the structure shown in the figure, corresponding to the larger height of the box mounting frame 113 of approximately 4RU height, two rows of mounting frame connection mechanisms 114 can be arranged along the height direction, and each row includes three mounting frame connection mechanisms 114. In an exemplary structure, each mounting frame connection mechanism 114 includes holes formed on the box mounting frame 113 and the side plate 112 and aligned with each other, and also includes a screw-nut structure. The screw can pass through the holes on the box mounting frame 113 and the side plate 112 aligned with each other from one side (for example, the outside of the housing 110 shown in the figure), and the nut is screwed with the screw from the other opposite side (for example, the inside of the housing 110 shown in the figure), thereby achieving fastening.

[0056] Preferably, each row of mounting frame connection mechanisms 114 includes more than three mounting frame connection mechanisms 114, which allows the position of the box mounting frame 113 to be adjusted in the front-rear direction. The adjustment range of the box mounting frame 113 can be determined by setting the distance between two adjacent mounting frame connection mechanisms 114 in the same row of mounting frame connection mechanisms 114. In an exemplary structure, the adjustment range of the box mounting frame 113 can be between 10 and 70 mm, preferably in the range of 20 to 50 mm, and more specifically can be 50 mm.

[0057] According to the actual application scenario, the number of the mounting frame connection mechanisms 114 shown in the figure can be increased or decreased. For example, three or more rows of mounting frame connection mechanisms 114 can be included to achieve a stable connection to the box mounting frame 113.

[0058] A front door 120 is mounted on the front side of the housing 110, and the front door 120 can be opened in a closed position (see FIG. Figure 1 ) and open position (see Figure 2 ) between the front door 120. A front door latch 121 is provided on the front door 120. When the front door 120 is in the closed position, the front door latch 121 locks the front door 120 in its closed position.

[0059] A rear door 130 is mounted on the rear side of the housing 110, and the rear door 130 can also be in a closed position (see Figure 1 ) and open position (see Figure 2 ). A pull pin 131 as a locking mechanism is provided on the rear door 130. When the rear door 130 is in the closed position, the pull pin 131 locks the rear door 130 in the closed position so that the rear door 130 cannot be easily opened. In addition to the pull pin 131, other locking devices can also be used. For example, a latch can be provided on the rear door 130 as with the front door 120.

[0060] Go to Figure 2, the optical fiber box 100 further includes a drawer 140, which is movably accommodated in the housing 110 and can move linearly relative to the housing 110 along the front-to-back direction, so as to switch between a withdrawn position extending out of the housing 110 and a retracted position retracted in the housing 110. In the exemplary structure shown in the figure, guide rails 141 are respectively provided on the left and right sides of the drawer 140, and the guide rails 141 can be installed on the lower sides of the two side plates 112 of the housing 110 by means such as welding, screw connection, etc., and can be slidably matched with the left and right sides of the drawer 140. Of course, other existing structures can also be used to realize the movement of the drawer 140 relative to the housing 110 along the front-to-back direction, for example, a structure such as a roller can be provided at the bottom of the drawer 140, and so on. These are also within the scope of the present application.

[0061] from Figure 2 It can be seen more clearly in the figure that the front door 120 is connected to the front end side of the drawer 140. Specifically, the two ends of the bottom edge of the front door 120 are pivotally connected to the front end side of the drawer 140 via first connecting members 122, respectively. The first connecting member 122 is preferably a rivet, and by using the rivet, the first connecting member 122 can be quickly and firmly connected to the drawer 140. In addition, the first connecting member 122 is configured to allow the front door 120 to pivot within a range of 180° relative to the front end of the drawer 140. In other words, the front door 120 can rotate 180° from its closed position around the pivot axis defined by the first connecting member 122. Since the rotation range of the front door 120 can be as high as 180°, when the front door 120 is opened to access the fiber optic switching box 200 (see FIG. 2 ) in the fiber optic box 100, the front door 120 can be rotated 180°. Figure 3 ) and the corresponding optical fibers are repaired and arranged, the maintenance operator will not be disturbed by the front door 120.

[0062] A transfer box mounting frame 150 is provided at the front of the drawer 140, or at a portion close to the front door 120. The transfer box mounting frame 150 includes a plurality of transfer box mounting posts 151 extending in the up-down direction, and mounting structures such as screw holes may be provided on the transfer box mounting posts 151 for fixing and mounting the optical fiber transfer box 200.

[0063] The adapter box mounting frame 150 further includes a reinforcing crossbeam 152 extending between the adapter box mounting columns 151 in the horizontal direction, and the reinforcing crossbeam 152 can improve the strength of the adapter box mounting frame 150 so that it can carry multiple optical fiber adapter boxes 200. More specifically, the adapter box mounting frame 150 at least includes a reinforcing crossbeam 152 (or a first reinforcing crossbeam) located in the middle of the adapter box mounting frame 150 in the vertical direction, and the reinforcing crossbeam 152 and the adapter box mounting columns 151 extend substantially perpendicular to each other, thereby forming a plurality of optical fiber adapter box insertion holes 153 in the adapter box mounting frame 150. When installing the optical fiber adapter box 200, the optical fiber adapter box 200 is inserted into these optical fiber adapter box insertion holes 153, and then the optical fiber adapter box 200 is fixedly connected to the adapter box mounting columns 151 at the front end of the optical fiber adapter box 200.

[0064] In the exemplary structure shown in the figure, the adapter box mounting frame 150 includes five adapter box mounting columns 151 extending in the vertical direction and at least one reinforcing beam 152 located in the middle position, and also includes a reinforcing beam 152 (or a second reinforcing beam) located at the top. In this way, two upper and lower rows of fiber optic adapter box sockets 153 are formed in the adapter box mounting frame 150, each row includes four fiber optic adapter box sockets 153, and a total of eight fiber optic adapter box sockets 153. In addition, the height of each fiber optic adapter box socket 153 is 2RU height and the width is 1RU width. In this way, each fiber optic adapter box socket 153 can accommodate two fiber optic adapter boxes 200 stacked in the upper and lower directions. Therefore, in the structure shown in the figure, sixteen fiber optic adapter boxes 200 can be installed on the adapter box mounting frame 150 of the fiber optic box 100, such as Figure 3 Clearly shown in .

[0065] Two rows of fiber clamps 160 arranged in the vertical direction are respectively provided on both sides of the front end of the pull-out portion 140. The fiber clamps 160 can be used to clamp and fix the optical fibers entering and connected to the fiber optic switching box 200 and leaving the optical fiber box 100, so that the optical fibers are arranged in an orderly manner, which is convenient for operators to arrange the optical fibers. The fiber clamps 160 can be in the form of spring clamps, or in the form of other known types of fiber clamps.

[0066] In order to install the optical fiber clamp 160 , optical fiber clamp installation posts 161 are respectively provided on both sides of the front end of the pulling portion 140 , and the optical fiber clamp 160 is fixedly connected to the optical fiber clamp installation posts 161 .

[0067] Preferably, as shown in the figure, a latch matching frame 123 is provided on the top of the fiber clamp mounting column 161, and the position of the latch matching frame 123 corresponds to the front door latch 121 on the front door 120. When the front door 120 is turned to the closed position, the front door latch 121 can be aligned with the latch matching frame 123, and the operator can open the front door latch 121 by a wrench (see FIG. Figure 1 ) Switch the front door latch 121 to a locked state so that the front door latch 121 is locked and matched with the latch matching frame 123 to achieve locking of the front door 120.

[0068] The latching bracket 123 can be fastened to the fiber clamp mounting post 161 by various methods known in the art, such as screws, rivets, welding, etc.

[0069] Preferably, an inspection hole 124 is further provided at the bottom of the drawer 140, and the inspection hole 124 is located between the adapter box mounting frame 150 and the front door 120, and the operator can reach the optical fiber adapter box 200 and the corresponding optical fiber installed on the adapter box mounting frame 150 through the inspection hole 124. In this way, in some cases, the optical fiber adapter box and the optical fiber can be inspected and arranged without opening the front door 120, thereby facilitating the maintenance of the optical fiber box 100.

[0070] Preferably, as shown in the figure, a spring lock pin 125 is further provided between the lower side of the front door 120 and both side ends of the front end of the drawer 140, which can lock the front door 120 at the lower side in the closed position of the front door 120. The spring lock pin 125 cooperates with the front door latch 121 located near the top to more reliably lock the front door 120 in its closed position.

[0071] Preferably, a wiring hole 115 and an optical fiber binding bracket 116 are further provided on the rear side of the side plate 112 of the housing 110 to guide and organize the optical fibers. The optical fibers inside the optical fiber box 100 can extend through the wiring hole 115, and the optical fibers can be fixed to the optical fiber binding bracket 116 by components such as cable ties to prevent interference between multiple optical fibers.

[0072] The wiring hole 115 is a sealed dustproof hole, which includes, for example, a flexible material with a cross-shaped crack, such as rubber, etc. In this way, dust can be prevented from entering the fiber optic box 100 from the outside through the wiring hole 115. In addition to the cross-shaped crack shown in the figure, the flexible sealing material in the wiring hole 115 can also form gaps of other shapes, such as a straight seam, a cross seam, etc.

[0073] The optical fiber binding bracket 116 can be fixedly mounted on the side plate 112 by means of fastening components such as screws. Preferably, the optical fiber binding bracket 116 can be fixed by using M5 triangular screws.

[0074] The rear door 130 can be pivotally connected to the rear end of the housing 110 via a second connecting member 132, such as a rivet. Also, the second connecting member 132 is configured to allow the rear door 130 to pivot up to an angle of 90° from its closed position.

[0075] The preferred structure of the fiber optic box 100 of the present application is described above in conjunction with the accompanying drawings. In a specific application, up to sixteen fiber optic transfer boxes can be installed in the fiber optic box, each fiber optic transfer box includes 24 fiber cores, so that the fiber optic box can include 384 fiber cores.

[0076] Of course, the fiber optic box 100 may also be designed to accommodate other quantities and other types of fiber optic switching boxes as needed, which are also within the scope of the present application.

[0077] In the exemplary structure shown, the housing 110 may not have a bottom plate, and the bottom of the drawer 140 may serve as the bottom plate. Of course, the housing 110 including the bottom plate is also within the scope of the present application. Further, the drawer may not be included, and the adapter box mounting frame 150 for mounting the optical fiber adapter box and the optical fiber clamp mounting column 161 for carrying the optical fiber clamp 160 may be mounted on the bottom plate of the housing 110.

[0078] The fiber optic box 100 described above has a height of 4RU, so that four layers of fiber optic switching boxes 200 stacked in the vertical direction can be installed. Those skilled in the art will appreciate that, as required, the height of the fiber optic box 100 can also be set to other heights above the 4RU height to accommodate other layers of fiber optic switching boxes 200, such as five layers, six layers, etc.

Claims

1. A multi-layer optical fiber box, comprising an outer shell, the outer shell comprising side panels located at left and right sides, and a top plate and a bottom plate located at the top of the outer shell and extending between the two side panels, a front door is installed at the front side of the outer shell, and the front door can move between a closed position and an open position, and a rear door is installed at the rear side of the outer shell, and the rear door can move between a closed position and an open position, It is characterized in that An adapter box mounting frame is installed on the base plate, and the adapter box mounting frame includes: a plurality of adapter box mounting posts, which extend vertically in the up-down direction, and the distance between two adjacent adapter box mounting posts is equal to the 1RU width; and at least one first reinforcing beam, which is located at a middle position between the top and the bottom of the adapter box mounting frame and extends in a horizontal direction perpendicular to the adapter box mounting posts, thereby forming a plurality of fiber optic adapter box jacks in the adapter box mounting frame; wherein the height of the adapter box mounting posts is 4RU or greater, so that four or more layers of fiber optic adapter boxes stacked in the up-down direction can be installed on the adapter box mounting frame.

2. The multi-layer optical fiber box according to claim 1, characterized in that: The adapter box mounting frame further includes a second reinforcing crossbeam, and the second reinforcing crossbeam extends in a horizontal direction at the top of the adapter box mounting frame.

3. The multi-layer optical fiber box according to claim 1, characterized in that: The height of the housing and the height of the adapter box mounting frame are 4RU.

4. The multi-layer optical fiber box according to any one of claims 1 to 3, characterized in that: The multi-layer optical fiber box further includes a drawer portion, which is movably accommodated in the housing, and a bottom of the drawer portion serves as the bottom plate of the housing.

5. The multi-layer optical fiber box according to claim 4, characterized in that: The multi-layer optical fiber box further comprises guide rails arranged on both sides of the drawer, the guide rails are mounted on the lower side of the side plate of the housing and slidably cooperate with the side edge of the drawer.

6. The multi-layer optical fiber box according to any one of claims 1 to 3, characterized in that: Two rows of the optical fiber transfer box jacks are formed in the transfer box mounting frame, each row includes four optical fiber transfer box jacks, and the height of each optical fiber transfer box jack is 2RU.

7. The multi-layer optical fiber box according to any one of claims 1 to 3, characterized in that: Both ends of the bottom edge of the front door are pivotally connected to the front end side of the base plate via a first connecting member, and the first connecting member is configured to allow the front door to rotate a maximum of 180° from the closed position of the front door around a pivot axis defined by the first connecting member.

8. The multi-layer optical fiber box according to claim 7, characterized in that: The rear door is pivotably connected to the rear end of the housing by a second connection, and the second connection is arranged to allow the rear door to rotate through a maximum of 90° from the closed position of the rear door about a pivot axis defined by the second connection.

9. The multi-layer optical fiber box according to claim 8, characterized in that: At least one of the first connecting member and the second connecting member is a rivet.

10. The multi-layer optical fiber box according to any one of claims 1 to 3, characterized in that: Optical fiber clamp mounting columns are respectively arranged on both sides of the front end of the bottom plate, and a plurality of optical fiber clamps are fixedly connected to the optical fiber clamp mounting columns, and the number of the optical fiber clamps is the same as the number of layers of the optical fiber switching box; as well as The front door is provided with a front door latch, and a latch matching frame is provided on the top of the optical fiber clamp mounting column. When the front door is in the closed position of the front door, the front door latch is locked and matched with the latch matching frame.

11. The multi-layer optical fiber box according to any one of claims 1 to 3, characterized in that: A box mounting frame is mounted on the side plate, and the box mounting frame is configured to be able to adjust the position along the front-rear direction, and the adjustment range of the box mounting frame is 50 mm.

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