Optical fiber distribution box

Abstract

The utility model provides an optical fiber distribution box, and belongs to the technical field of optical communication. The optical fiber distribution box comprises a box body and a light splitting assembly. The back of the box body comprises a back plate, a surrounding plate and a bottom plate. The back plate is provided with an opening, and the surrounding plate is located on the inner side of the back plate and surrounds the opening. The bottom plate seals the side, away from the back plate, of the coaming. A hanging hole is formed by the cavity defined by the surrounding plate and the open hole, and the hanging hole is separated from the interior of the box body. Therefore, the sealing performance of the optical fiber distribution box is ensured, the optical fiber of the light splitting assembly cannot be exposed through the hanging hole, the possibility that the optical fiber is hooked by the hanging nail is reduced, and the risk of fiber breakage is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of optical communication technologies, and particularly to an optical fiber distribution box. Background Art

[0002] The optical fiber distribution box includes a box body and a splitting component, and the splitting component is located inside the box body. Hanging holes are formed on the back plate of the box body, and the hanging holes cooperate with hanging nails fixed on the wall to enable the wall-mounted installation of the optical fiber distribution box.

[0003] However, the setting of the hanging holes makes the inside and outside of the box body communicate, resulting in poor sealing performance of the optical fiber distribution box. Moreover, there is a risk that the optical fibers of the splitting component are exposed through the hanging holes. Summary of the Utility Model

[0004] The present disclosure provides an optical fiber distribution box. The back plate of the optical fiber distribution box has an opening, a surrounding plate surrounds the opening, and the back plate closes the side of the surrounding plate away from the back plate. The cavity surrounded by the surrounding plate and the opening of the back plate form a hanging hole, and the hanging hole is separated from the inside of the box body. In this way, the sealing performance of the optical fiber distribution box is improved, and the risk of optical fiber exposure is reduced. The technical solution of the optical fiber distribution box is as follows.

[0005] The present disclosure provides an optical fiber distribution box. The optical fiber distribution box includes a box body and a splitting component. The back of the box body includes a back plate, a surrounding plate, and a bottom plate. The back plate has an opening, the surrounding plate is located inside the back plate and surrounds the opening. The bottom plate closes the side of the surrounding plate away from the back plate. The surrounding plate and the bottom plate separate the opening from the inside of the box body. The splitting component is located inside the box body.

[0006] Among them, the optical fiber distribution box can also be called an access terminal box (ATB) or an optical splitter. The box body is used to protect and fix the internal splitting component. The cavity formed by the opening of the back plate and the surrounding plate forms a hanging hole, and the hanging hole can cooperate with a hanging nail to realize the wall-mounted installation of the optical fiber distribution box. The hanging hole can also be called a wall mounting screw hole. The splitting component is used to realize the functions of splitting and combining light. The splitting component includes a splitting chip, multiple optical fibers, and multiple optical fiber ferrules, and the splitting chip is respectively connected to the multiple optical fiber ferrules through the multiple optical fibers.

[0007] The technical solution provided by the present disclosure is to set a surrounding plate and a bottom plate on the inner side of the back plate, and set the surrounding plate to surround the opening, and the bottom plate closes the side of the surrounding plate facing away from the back plate, so that the surrounding plate and the bottom plate separate the opening from the inside of the box body, and the cavity formed by the opening and the surrounding plate forms a hanging hole separated from the inside of the box body. Thus, the sealing performance of the optical fiber distribution box is improved, the optical fibers inside the box body will not be exposed through the hanging hole, and the possibility of the optical fiber being hooked by the hanging nail and broken is reduced.

[0008] In a possible implementation, the opening includes a large hole portion and a small hole portion that are connected. The inner diameter of the large hole portion is larger than the inner diameter of the small hole portion. The hole wall of the small hole portion protrudes relative to the enclosure. The large hole portion is used for the head of the hanging nail to pass through, so that the head can extend into the cavity surrounded by the enclosure. The hole wall of the small hole portion protrudes relative to the enclosure, so that the head of the hanging nail can be stuck by the back plate around the small hole portion, so that the hanging nail cannot be separated from the cavity.

[0009] In a possible implementation, the hole wall of the large hole portion does not protrude relative to the surrounding plate.

[0010] In a possible implementation, the large hole portion and the small hole portion are arranged in sequence along the first direction. The cavity enclosed by the enclosure includes a first portion and a second portion arranged in sequence along the first direction, and the interface between the first portion and the second portion is coplanar with the interface between the large hole portion and the small hole portion. The size of the first portion along the first direction is greater than the size of the second portion along the first direction.

[0011] The first part is formed by injection molding of the first slider, and the second part is formed by injection molding of the second slider. After the injection molding is completed, the second slider needs to slide into the first part and escape from the first part.

[0012] The technical solution provided by the present disclosure sets the size of the first part along the first direction to be larger than the size of the second part along the first direction, so that when the slider is taken out after injection molding is completed, the second slider can slide to the first part and escape from the large hole part, thereby ensuring smooth demolding.

[0013] In a possible implementation, the large hole portion and the small hole portion are arranged in sequence along the first direction. The size of the large hole portion along the first direction is greater than the size of the small hole portion along the first direction.

[0014] In a possible implementation, the large hole portion is in a long strip shape.

[0015] In a possible implementation manner, the large hole portion is rectangular.

[0016] In a possible implementation, the small hole portion includes a limiting hole portion and a guide hole portion. The first end of the guide hole portion is connected to the large hole portion, and the second end of the guide hole portion is connected to the limiting hole portion. In addition, the inner diameter of the guide hole portion gradually decreases along the direction from the first end to the second end.

[0017] The technical solution provided by the present disclosure, by setting a guide hole portion, facilitates guiding the rod portion of the hanging nail from the large hole portion to the limiting hole portion, reduces the possibility of the rod portion being stuck at the junction of the large hole portion and the small hole portion, and improves the smoothness of the wall-mounted installation of the optical fiber distribution box.

[0018] In a possible implementation, the optical fiber distribution box further includes a hanging nail, which includes a head and a rod. The outer diameter of the head is smaller than the inner diameter of the large hole and larger than the inner diameter of the position-limiting hole, and the thickness of the head is smaller than the height of the enclosure. The outer diameter of the rod is smaller than the inner diameter of the position-limiting hole.

[0019] The technical solution provided by the present disclosure, through the above-mentioned size design, enables the head of the hanging nail to extend into the cavity surrounded by the enclosure through the large hole. Afterwards, the box body is moved to make the hanging nail slide toward the limiting hole, and the head of the hanging nail can be stuck by the back plate around the limiting hole, and the hanging nail cannot be separated from the cavity.

[0020] In a possible implementation, the protrusion of the head relative to the rod is smaller than the protrusion of the position-limiting hole relative to the enclosure. In this way, when the optical fiber distribution box is in a wall-mounted state, the rod can be ensured to contact the hole wall of the position-limiting hole, so that the force of the optical fiber distribution box is more reasonable.

[0021] In a possible implementation, the back plate, the enclosure plate and the bottom plate are integrally injection molded.

[0022] In a possible implementation, the back plate has two openings, and the back of the box body includes two enclosures and two bottom plates. The two enclosures surround the two openings respectively, and the two bottom plates are connected to the two enclosures respectively. In this way, the optical fiber distribution box can be mounted on the wall through two hanging nails, and the force on the optical fiber distribution box is more uniform and not prone to tilting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of an optical fiber distribution box provided by an embodiment of the present disclosure;

[0024] Figure 2 is an exploded view of an optical fiber distribution box provided by an embodiment of the present disclosure;

[0025] Figure 3 is a schematic diagram of the back of a fiber optic distribution box provided by an embodiment of the present disclosure;

[0026] Figure 4 is a partial schematic diagram of the back of a fiber optic distribution box provided by an embodiment of the present disclosure;

[0027] Figure 5 is a partial schematic diagram of the back of a fiber optic distribution box provided by an embodiment of the present disclosure;

[0028] Figure 6 It is a flow chart of wall-mounted installation of a fiber optic distribution box provided by an embodiment of the present disclosure;

[0029] Figure 7 It is a schematic diagram of the relevant dimensions of a hanging nail and a hanging hole provided in an embodiment of the present disclosure;

[0030] Figure 8 It is a schematic diagram of the injection molding process of a box body provided by an embodiment of the present disclosure;

[0031] Figure 9 It is a schematic diagram of the relevant dimensions of a hanging hole and a surrounding plate provided by an embodiment of the present disclosure;

[0032] Figure 10 It is a cross-sectional view of the back of an optical fiber distribution box provided by an embodiment of the present disclosure.

[0033] Legend Explanation

[0034] 1. Box body, 11. Bottom shell, 110. Opening, 1101. Large hole part, 1102. Small hole part, 11021. Limit hole part, 11022. Guide hole part, 111. Back plate, 112. Surrounding plate, 1120. Cavity, 1121. First part, 1122. Second part, 113. Bottom plate, 12. Upper cover;

[0035] 2. Splitter module, 21. Splitter chip, 22. Optical fiber, 23. Optical fiber ferrule;

[0036] 3. Hanging nail, 31. Head, 32. Shank;

[0037] 4. First slider, 5. Second slider. Detailed Implementation Manner

[0038] With the development of fiber to the room (FTTR), the point to multiple point (P2MP) optical fiber networking technology is more and more applied in the home scenario. Among them, the optical fiber distribution box is a key device to realize the P2MP optical fiber networking technology. The optical fiber distribution box is used to split the downstream optical signal sent by the upper-level device and send it to multiple lower-level devices respectively; and, to combine the upstream optical signals sent by multiple lower-level devices and send them to the upper-level device.

[0039] The optical fiber distribution box includes a box body and a splitter module, and the splitter module is located inside the box body. The splitter module is used to realize the above-mentioned splitting and combining functions. In the related art, hanging holes are opened on the back plate of the box body, and the hanging holes cooperate with the hanging nails fixed on the wall to realize the wall-mounted installation of the optical fiber distribution box.

[0040] However, the setting of the hanging holes makes the inside and outside of the box body communicate, resulting in poor sealing of the optical fiber distribution box. In addition, there is a risk that the optical fibers of the splitter module are exposed through the hanging holes, so that when the hanging holes and the hanging nails cooperate, the hanging nails may hook the optical fibers, resulting in fiber breakage.

[0041] In view of the above technical problems, an embodiment of the present disclosure provides an optical fiber distribution box. AsFigure 1 and Figure 2 As shown in Figures 2 - 5 , the optical fiber distribution box includes a box body 1 and a splitting component 2, and the splitting component 2 is located inside the box body 1. As Figures 2 - 5 shown in , the back of the box body 1 includes a back plate 111, a surrounding plate 112 and a bottom plate 113. The back plate 111 has an opening 110, the surrounding plate 112 is located inside the back plate 111 and surrounds the opening 110. The bottom plate 113 closes the side of the surrounding plate 112 away from the back plate 111. The surrounding plate 112 and the bottom plate 113 separate the opening 110 from the inside of the box body 1.

[0042] Among them, the optical fiber distribution box can also be called an access terminal box (ATB) and an optical splitter. The box body 1 is used to protect and fix the internal splitting component 2. The cavity 1120 formed by the opening 110 of the back plate 111 and the surrounding plate 112 forms a hanging hole, and the hanging hole can cooperate with a hanging nail to realize the wall mounting of the optical fiber distribution box. The hanging hole can also be called a wall mounting screw hole. In some examples, as Figure 2 shown in , the box body 1 includes a bottom shell 11 and an upper cover 12, and the back plate 111, the surrounding plate 112 and the bottom plate 113 are located on the bottom shell 11.

[0043] As Figure 2 shown in , the splitting component 2 includes a splitting chip 21, multiple optical fibers 22 and multiple optical fiber ferrules 23. The splitting chip 21 is connected to the multiple optical fiber ferrules 23 through the multiple optical fibers 22 respectively. The optical fiber ferrule 23 is used to dock with an external optical fiber connector to realize the input and output of optical signals.

[0044] The technical solution provided by the embodiments of the present disclosure is to arrange the surrounding plate 112 and the bottom plate 113 on the inner side of the back plate 111 of the box body 1, and arrange the surrounding plate 112 to surround the opening 110 of the back plate 111, and the bottom plate 113 closes the side of the surrounding plate 112 facing away from the back plate 111, so that the surrounding plate 112 and the bottom plate 113 separate the opening 110 from the inside of the box body 1, and the cavity 1120 formed by the opening 110 and the surrounding plate 112 forms a hanging hole separated from the inside of the box body 1. Thus, the sealing performance of the optical fiber distribution box is ensured, the optical fibers 22 of the splitting component 2 will not be exposed through the hanging hole, the possibility of optical fiber 22 breakage is reduced, and the reliability of the optical fiber distribution box is improved.

[0045] In some examples, as Figure 4 shown in , the opening 110 includes a large hole portion 1101 and a small hole portion 1102 that are connected and communicated, and the inner diameter of the large hole portion 1101 is greater than the inner diameter of the small hole portion 1102. The hole wall of the small hole portion 1102 protrudes relative to the surrounding plate 112.

[0046] Among them, as Figure 6As shown, the large-hole portion 1101 is used for the head 31 of the hanging nail 3 to pass through, so that the head 31 can extend into the cavity 1120 surrounded by the surrounding plate 112. The hole wall of the small-hole portion 1102 protrudes relative to the surrounding plate 112, so that the head 31 of the hanging nail 3 can be limited by the back plate 111 around the small-hole portion 1102, preventing the hanging nail 3 from detaching from the cavity 1120.

[0047] In some examples, such as Figure 4 As shown, the hole wall of the large-hole portion 1101 does not protrude relative to the surrounding plate 112. For example, as Figure 4 As shown, the hole wall of the large-hole portion 1101 is flush with or coplanar with the inner wall of the surrounding plate 112. For another example, the hole wall of the large-hole portion 1101 retracts relative to the inner wall of the surrounding plate 112.

[0048] The embodiments of the present disclosure do not limit the shapes of the large-hole portion 1101 and the small-hole portion 1102. In some examples, such as Figure 4 and Figure 7 As shown, the large-hole portion 1101 is rectangular. In other examples, the large-hole portion 1101 can also be an oval hole, that is, in addition to including a rectangular portion, the large-hole portion 1101 also includes a semi-circular portion.

[0049] In some examples, such as Figure 4 and Figure 7 As shown, the small-hole portion 1102 includes a limiting hole portion 11021 and a guiding hole portion 11022. The first end of the guiding hole portion 11022 is communicated with the large-hole portion 1101, and the second end of the guiding hole portion 11022 is communicated with the limiting hole portion 11021. And, along the direction from the first end to the second end, the inner diameter of the guiding hole portion 11022 gradually decreases. Among them, the limiting hole portion 11021 can be semi-oval.

[0050] The technical solution provided by the embodiments of the present disclosure facilitates guiding the rod portion 32 of the hanging nail 3 from the large-hole portion 1101 to the limiting hole portion 11021 by providing the guiding hole portion 11022, reducing the possibility that the rod portion 32 gets stuck at the junction of the large-hole portion 1101 and the small-hole portion 1102, and improving the smoothness of the wall-mounted installation of the optical fiber distribution box.

[0051] In some examples, such as Figure 6 and Figure 7 As shown, the optical fiber distribution box further includes a hanging nail 3. The hanging nail 3 includes a head 31 and a rod portion 32. The outer diameter d1 of the head 31 is smaller than the inner diameter L4 of the large-hole portion 1101 and larger than the inner diameter L5 of the limiting hole portion 11021. The thickness of the head 31 is smaller than the height of the surrounding plate 112 (ensuring that the head 31 can extend into the cavity 1120 surrounded by the surrounding plate 112). The outer diameter d2 of the rod portion 32 is smaller than the inner diameter L5 of the limiting hole portion 11021. Among them, the inner diameter L4 and the inner diameter L5 can also be referred to as the width L4 and the width L5.

[0052] The technical solution provided by the embodiment of the present disclosure, through the above-mentioned size design, enables the head 31 of the hanging nail 3 to extend into the cavity 1120 surrounded by the surrounding plate 112 through the large hole portion 1101. Afterwards, the box body 1 is moved to make the hanging nail 3 slide toward the limiting hole portion 11021, and the head 31 of the hanging nail 3 can be stuck by the back plate 111 around the limiting hole portion 11021, and the hanging nail 3 cannot be separated from the cavity 1120.

[0053] In some examples, such as Figure 7 As shown, the protrusion dimension L7 of the head portion 31 relative to the rod portion 32 is smaller than the protrusion dimension L6 of the hole wall of the limiting hole portion 11021 relative to the surrounding plate 112. Wherein, L7 = (d1-d2) / 2. Thus, Figure 7 As shown in the right part of the figure, when the optical fiber distribution box is in the wall-mounted state, it can ensure that the rod portion 32 is in contact with the hole wall of the limiting hole portion 11021, rather than being in a spaced state, so that the force on the optical fiber distribution box is more reasonable.

[0054] The embodiment of the present disclosure does not limit the number of openings 110 included in the back plate 111. In some examples, for example, Figure 6 As shown, the back plate 111 has two openings 110, and the back of the box body 1 includes two enclosures 112 and two bottom plates 113. The two enclosures 112 surround the two openings 110 respectively, and the two bottom plates 113 are connected to the two enclosures 112 respectively.

[0055] In this way, the optical fiber distribution box can be mounted on the wall through the two hanging nails 3, and the force on the optical fiber distribution box is more uniform and is not prone to tilt.

[0056] Below, as Figure 6 As shown, the operation method of wall-mounting the optical fiber distribution box is exemplarily described.

[0057] First, the peg 3 is fixed to the wall. In some examples, the peg 3 can be fixed to the wall by bonding. In other examples, the peg 3 is an expansion screw and is fixed to the wall.

[0058] Second, operate the optical fiber distribution box so that the large hole 1101 on the optical fiber distribution box is aligned with the hanging nail 3. Press the optical fiber distribution box so that the head 31 of the hanging nail 3 extends through the large hole 1101 into the cavity 1120 surrounded by the enclosure 112.

[0059] Third, move the fiber optic distribution box so that the nail 3 slides to the small hole 1102 (limiting hole 11021), and the head 31 of the nail 3 is stuck by the back plate 111 around the small hole 1102, so that the head 31 cannot be detached from the fiber optic distribution box, and the wall-mounted installation of the fiber optic distribution box is completed.

[0060] The embodiments of the present disclosure do not limit the forming method of the box body 1. In some examples, the back plate 111, the surrounding plate 112, and the bottom plate 113 are integrally injection-molded.

[0061] In some examples, as Figure 8 shown, the back plate 111, the surrounding plate 112, and the bottom plate 113 need to be injection-molded with the cooperation of the first slider 4 and the second slider 5. After the injection molding is completed, the first slider 4 and the second slider 5 need to be taken out to complete the demolding. When taking out the first slider 4 and the second slider 5, first, the first slider 4 is taken out through the large hole portion 1101. Then, the second slider 5 will slide towards the large hole portion 1101. After the second slider 5 completely slides into the large hole portion 1101, the second slider 5 is taken out through the large hole portion 1101.

[0062] From Figure 8 it can be seen that due to the special structure of the second slider 5, the second slider 5 cannot be directly taken out through the small hole portion 1102 because it is stuck by the back plate 111 around the small hole portion 1102. Therefore, the second slider 5 must be taken out from the large hole portion 1101. In order to ensure that the second slider 5 can be taken out smoothly, the dimension of the first slider 4 in the first direction should be smaller than the dimension of the large hole portion 1101 in the first direction. Wherein, the first direction is the direction in which the large hole portion 1101 and the small hole portion 1102 are arranged in sequence.

[0063] Further derivation shows that, as Figure 9 and Figure 10 shown, the cavity 1120 surrounded by the surrounding plate 112 includes a first part 1121 and a second part 1122 arranged in sequence in the first direction. The interface between the first part 1121 and the second part 1122 coincides with the interface between the large hole portion 1101 and the small hole portion 1102. Then the dimension L1 of the first part 1121 in the first direction is greater than the dimension L2 of the second part 1122 in the first direction. In this way, it can ensure the smooth removal of the second slider 5 to complete the demolding.

[0064] In addition, through the above derivation, it can be obtained that, as Figure 9 and Figure 10 shown, the dimension L1 of the large hole portion 1101 in the first direction should be greater than the dimension L3 of the small hole portion 1102 in the first direction.

[0065] The terms used in the embodiments section of the present disclosure are only for explaining the embodiments of the present disclosure and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The "first", "second" and similar terms used in the specification and claims of the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. The words such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly. "Plurality" means two or more, unless otherwise clearly defined.

[0066] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. An optical fiber distribution box, characterized in that, The optical fiber distribution box includes a box body (1) and a splitting component (2); The back of the box body (1) includes a back plate (111), a surrounding plate (112), and a bottom plate (113); The back plate (111) has an opening (110), the surrounding plate (112) is located inside the back plate (111) and surrounds the opening (110), the bottom plate (113) closes the side of the surrounding plate (112) away from the back plate (111), and the surrounding plate (112) and the bottom plate (113) separate the opening (110) from the interior of the box body (1); The splitting component (2) is located inside the box body (1).

2. The fiber optic distribution box according to claim 1, characterized in that, The opening (110) includes a large hole part (1101) and a small hole part (1102) that are connected and communicate with each other, and the hole wall of the small hole part (1102) protrudes relative to the surrounding plate (112).

3. The fiber optic distribution box according to claim 2, characterized in that, The hole wall of the large hole part (1101) does not protrude relative to the surrounding plate (112).

4. The fiber optic distribution box according to claim 2 or 3, characterized in that, The large hole part (1101) and the small hole part (1102) are arranged in sequence along a first direction; The cavity (1120) surrounded by the surrounding plate (112) includes a first part (1121) and a second part (1122) that are arranged in sequence along the first direction, and the interface surface between the first part (1121) and the second part (1122) is coplanar with the interface surface between the large hole part (1101) and the small hole part (1102); The dimension of the first part (1121) along the first direction is greater than the dimension of the second part (1122) along the first direction.

5. The optical fiber distribution box according to claim 2 or 3, characterized in that, The large hole part (1101) and the small hole part (1102) are arranged in sequence along a first direction; The dimension of the large hole part (1101) along the first direction is greater than the dimension of the small hole part (1102) along the first direction.

6. The optical fiber distribution box according to claim 2 or 3, characterized in that, The large hole part (1101) is rectangular.

7. The fiber optic distribution box according to claim 2 or 3, characterized in that, The small hole part (1102) includes a limiting hole part (11021) and a guiding hole part (11022); The first end of the guiding hole part (11022) communicates with the large hole part (1101), the second end of the guiding hole part (11022) communicates with the limiting hole part (11021), and along the direction from the first end to the second end, the inner diameter of the guiding hole part (11022) gradually decreases.

8. The optical fiber distribution box according to claim 7, characterized in that, The optical fiber distribution box further includes a hanging nail (3), and the hanging nail (3) includes a head (31) and a rod part (32); The outer diameter of the head (31) is smaller than the inner diameter of the large hole part (1101) and larger than the inner diameter of the limiting hole part (11021), and the thickness of the head (31) is smaller than the height of the surrounding plate (112); The outer diameter of the rod part (32) is smaller than the inner diameter of the limiting hole part (11021).

9. The fiber optic distribution box according to claim 8, wherein, The protruding dimension of the head (31) relative to the rod part (32) is smaller than the protruding dimension of the limiting hole part (11021) relative to the surrounding plate (112).

10. The optical fiber distribution box according to any one of claims 1-3, characterized in that, The back plate (111), the surrounding plate (112), and the bottom plate (113) are integrally injection molded.

11. The optical fiber distribution box according to any one of claims 1-3, characterized in that, The backplane (111) has two openings (110), the back of the box body (1) includes two side plates (112) and two bottom plates (113), the two side plates (112) respectively surround the two openings (110), and the two bottom plates (113) are respectively connected to the two side plates (112).

Images