Optical cage, communication equipment and heat conduction device

Abstract

An optical cage, a communication device and a heat conduction device relate to the technical field of communication, the optical cage comprises an insertion part and an accommodation part which are adjacently connected along a first direction, the insertion part comprises a first insertion wall and a second insertion wall which are oppositely arranged, and the first insertion wall is located at one side of the second insertion wall in a second direction. An insertion hole penetrating in the first direction is formed between the first insertion wall and the second insertion wall, and an optical module is inserted into the insertion hole; the accommodating part comprises two side walls which are oppositely arranged along a third direction, an accommodating cavity used for accommodating the optical module is arranged between the two side walls, the jack and the accommodating cavity are communicated along a first direction, the two side walls are enclosed along a first edge of a second direction to form an opening in one side of the accommodating cavity along the second direction, and the first edge is used for contacting and supporting the heat conduction device; the height of at least part of the first edge in the second direction is lower than the height of the outer wall face of the first inserting wall. According to the light cage, the overall height of the light cage and the heat conduction device can be reduced when the heat conduction device is installed on the light cage.

Description

Technical Field

[0001] This application relates to the technical field of communication devices, and particularly to an optical cage, a communication device, and a heat conduction device. Background Art

[0002] Optical fiber communication technology has the advantages of high speed, long-distance transmission, and anti-interference, and is widely used in communication devices such as optical transmission devices, switches, and routers. Currently, an optical cage is provided in a communication device. The optical cage has an optical module interface, and the optical module is pluggable on the interface of the optical cage. Signal connections are achieved between communication devices through the optical module.

[0003] With the continuous development and upgrade of 4G and 5G networks, the deployment of optical modules is becoming more and more intensive. Multiple optical cages are provided in a communication device, and a heat sink is provided on the top of the optical cage. Currently, the stacked design of the heat sink and the optical cage still needs to be optimized. Under the current stacked arrangement, the total height of the optical cage and the heat sink is relatively large, resulting in a large overall volume of the communication device and difficulty in arranging other components within the communication device. The layout of the optical cage and the heat sink has become a problem to be solved, which is particularly prominent in achieving a high-integration design in a limited space. Summary of the Invention

[0004] This application provides an optical cage, a communication device, and a heat conduction device, which can reduce the overall height of the optical cage and the heat conduction device when the heat conduction device is installed on the optical cage.

[0005] In a first aspect, this application provides an optical cage, including a plugging portion and a receiving portion adjacent to each other along a first direction. The plugging portion includes a first plugging wall and a second plugging wall disposed opposite to each other, and further includes a third plugging wall and a fourth plugging wall disposed opposite to each other. The first plugging wall is located on one side of the second direction of the second plugging wall. The first plugging wall, the third plugging wall, the second plugging wall, and the fourth plugging wall are sequentially connected to enclose a jack penetrating along the first direction for inserting an optical module. The receiving portion includes two side walls disposed opposite to each other along a third direction, and there is a receiving cavity for receiving the optical module between the two side walls. The jack and the receiving cavity communicate with each other along the first direction. The first edges of the two side walls along the second direction enclose an opening on one side of the receiving cavity along the second direction, and the first edges are used to contact and support the heat conduction device. Along the second direction, at least part of the height of the first edge is lower than the height of the outer wall surface of the first plugging wall.

[0006] The optical cage provided by the present application can be plugged with an optical module. An opening for placing a heat conduction device is provided at the accommodating part of the optical cage. In the second direction, the first edge of the opening is lower than the height of the first plugging wall. When the heat conduction device is placed on the first edge, the overall height of the heat conduction device and the optical cage is reduced. Especially when multiple optical cages are provided in a communication device and heat conduction devices are provided on all the multiple optical cages, due to the reduction of the overall height of a single optical cage and the heat conduction device, the overall height of the multiple optical cages is significantly decreased, so that more optical modules can be provided in a limited space, the height of the communication device can be reduced when the same number of optical modules are provided, and the space margin can be increased and the fin height of the heat conduction device can be increased, which is more beneficial to heat conduction. In addition, the optical module is in direct contact with the heat conduction device, and the heat dissipation effect is significantly improved, ensuring the stable operation of the system.

[0007] In a possible implementation manner, the accommodating part further includes a support plate. The first plugging wall, the opening and the support plate are arranged in sequence. The second edge of the support plate on the side close to the first plugging wall is a partial side edge of the opening. At least a partial outer wall surface of the support plate on one side in the second direction is a first wall surface, and the first wall surface is used to contact and support the heat conduction device. Along the second direction, the height of the first wall surface is lower than the height of the outer wall surface of the first plugging wall. The support plate is used to support the heat conduction device. The height of the first wall surface of the support plate along the second direction being lower than the outer wall surface of the first plugging wall enables the overall height of the optical cage and the heat conduction device to be reduced while being able to support the heat conduction device.

[0008] In a possible implementation manner, the outer wall surface of the support plate on one side in the second direction is a first wall surface. The first wall surface is parallel to the outer wall surface of the first plugging wall. The first wall surface is used to contact and support the heat conduction device. Along the second direction, the height of the first wall surface is lower than the height of the outer wall surface of the first plugging wall. In the second direction, the overall height of the support plate is lower than the height of the outer wall surface of the first plugging wall. The support member can support the heat conduction device, and when the heat conduction device is installed on the optical cage, the overall height of the heat conduction device and the optical cage is decreased.

[0009] In a possible implementation manner, the support plate includes a first part and a second part adjacent to each other along the third direction. The first wall surface is the outer wall surface of the first part along the second direction. The inner wall surface of the first part on the side opposite to the second direction is a second wall surface. The inner wall surface of the second part on the side opposite to the second direction is a third wall surface. The third wall surface is located on one side of the second wall surface along the second direction to form a step structure. Thus, the support member can match different types of optical modules, such as matching QSFPDD optical modules.

[0010] In a possible implementation, the outer wall surface of the second part along the second direction is a fourth wall surface, and the fourth wall surface is located on the side of the first wall surface along the second direction. The second part is protruded relative to the first part along the second direction. The support plate can be formed by bending an integral plate material and presenting a structure on the outside that the first part is lower than the second part. The heat pipe and other structures of the heat conducting device can be arranged in the sunken part of the first part to improve the thermal conductivity of the heat conducting device.

[0011] In a possible implementation, along the second direction, the fourth wall surface is coplanar with the outer wall surface of the first plug-in wall along the second direction. When the QSFPDD model optical module is inserted into the optical cage, the QSFPDD model optical module is longer, and the fourth wall surface is coplanar with the outer wall surface of the first plug-in wall along the second direction to ensure that the QSFPDD model optical module can be inserted into the optical cage.

[0012] In a possible implementation, the width of the first wall surface along the third direction is greater than 7 mm. The first wall surface provides space for arranging heat pipes in the heat conducting device, and can place a heat conducting device structure with heat pipes added inside. The arrangement of heat pipes inside the heat conducting device can improve the heat dissipation efficiency of the heat conducting device, and bring better heat dissipation effect to the heat dissipation of the optical module.

[0013] In a possible implementation, the support plate is provided with an absorbing structure on one side in the opposite direction of the second direction, and the absorbing structure is used to absorb electromagnetic radiation. The absorbing structure may be attached to one side of the support plate in the opposite direction of the second direction. The absorbing structure can absorb radiated electromagnetic waves generated by the electromagnetic compatibility device, reduce electromagnetic interference, and prevent the radiated electromagnetic waves of the electromagnetic compatibility device from affecting the functions of other communication devices.

[0014] In a possible implementation, the thickness of the second edge along the second direction is in the range of 0.35 mm to 0.5 mm. The thickness of the second edge along the second direction is in the range of 0.35 mm to 0.5 mm, and the side surface of the second edge on the opposite side of the first direction can better abut the optical module, limit the position of the optical module inserted into the optical cage along the first direction, and ensure that the optical module and the connector can be accurately positioned and connected.

[0015] In a possible implementation, at least one of the side walls is provided with a first protrusion, the first protrusion extending from the side wall to the side away from the accommodating cavity; the first protrusion has a support surface on one side along the second direction, the support surface is used to support the heat conducting device. The first protrusion forms a support surface on one side along the second direction, the width of the support surface along the third direction can be greater than the width of the first edge along the third direction, and the support surface can assist the two side walls in supporting the heat conducting device, providing more support area for the heat conducting device.

[0016] In a possible implementation, along the second direction, the height of the supporting surface is lower than the outer wall surface of the first plugging wall. The supporting surface is located between the outer wall surface of the first plugging wall and the outer wall surface of the second plugging wall. The supporting surface can not only support the heat conduction device, but also ensure that when the heat conduction device is installed on the optical cage, the overall height of the heat conduction device and the optical cage is reduced.

[0017] In a possible implementation, a limiting structure is provided on one side of the side wall in the second direction, and the limiting structure partially extends into the accommodating cavity for abutting against the optical module along the first direction. The part of the limiting structure extending into the accommodating cavity can abut against the optical module along the first direction to limit the plugging depth of the optical module in the optical cage and limit the position of the optical module inserted into the optical cage along the first direction, so that the optical module and the connector can be accurately positioned and connected.

[0018] In a possible implementation, the limiting structure includes a second protrusion extending from the first edge in the second direction, and the free end of the second protrusion is bent toward the side close to the accommodating cavity. The free end of the second protrusion is bent toward the side close to the accommodating cavity to form a structure similar to a C shape, which can match the groove on the optical module. When the optical module is inserted into the optical cage, the second protrusion can be inserted into the groove on the optical module to limit the optical module and ensure the accurate insertion position of the optical module in the optical cage, thereby improving the connection stability between the optical module and the optical cage.

[0019] In a second aspect, the present application provides a communication device, including a heat conduction device and the optical cage described in any one of the above, where at least a part of the heat conduction device is located on the side opposite to the outer wall surface of the first plugging wall along the reverse direction of the second direction, and the heat conduction device covers the opening and is in contact connection with the first edge of the optical cage.

[0020] The communication device provided by the present application is equipped with an optical cage. When the heat conduction device is installed on the optical cage, it is in contact with the opening of the optical cage. The first edge of the opening sinks relative to the outer wall surface of the first plugging wall, and the overall thickness of the optical cage and the heat conduction device can be reduced. Especially when multiple optical cages are provided in the communication device, multiple optical modules are respectively installed in the optical cages, so that the overall width or height of the communication device with multiple optical cages is effectively reduced, and thus more optical cages can be provided in a limited space. In the case of setting the same number of optical modules, the height of the communication device can also be reduced, and the space margin can be increased and the fin height of the heat conduction device can be increased, which is more beneficial to heat conduction. In addition, the heat conduction device can be directly in contact with the optical module, effectively improving the heat dissipation effect.

[0021] In a possible implementation, the communication device further includes an elastic member, the elastic member connects the optical cage and the heat conducting device, the optical cage and the heat conducting device are detachably connected, along the second direction, the heat conducting device moves relative to the optical cage, and the elastic member is configured to apply an elastic force toward the optical cage side to the heat conducting device in the opposite direction of the second direction.

[0022] When the optical module is inserted into the optical cage, it can contact the side of the heat conducting device facing the opening and cause the heat conducting device to move in the second direction. The elastic member can apply an elastic force in the opposite direction of the second direction to the heat conducting device, causing the heat conducting device to move toward the side of the optical cage. The elastic member can limit the heat conducting device in the second direction, ensuring better connection between the heat conducting device and the optical cage, and further better fitting with the optical module, improving the heat dissipation effect.

[0023] In a possible implementation, the communication device further includes a circuit board, the optical cage and the circuit board are fixedly connected, and at least one of the optical cages is mounted on the circuit board.

[0024] In a possible implementation, the communication device further includes a connector, the connector is located inside the optical cage, the connector is electrically connected to the circuit board, and the connector is used to electrically connect to the optical module.

[0025] In a possible implementation, the communication device includes a subrack, an installation cavity is provided on the subrack, and the circuit board is installed and fixed in the installation cavity.

[0026] In a possible implementation, the number of the installation cavities is at least one, and at least one of the circuit boards is provided in a single installation cavity.

[0027] In a third aspect, the present application provides a heat conducting device having a heat conducting surface, the heat conducting surface is a planar structure, and the heat conducting surface is used to contact the first edge of the optical cage and the optical module. The heat conducting device exchanges heat with the optical module through the heat conducting surface to achieve the effect of dissipating heat from the optical module. The heat conducting surface can directly contact the optical module, and the thickness of the part of the heat conducting device in contact with the optical module is small, which can better dissipate heat from the optical module and improve the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

[0029] Figure 2 is a schematic structural diagram of an optical cage provided by an embodiment of the present application;

[0030] Figure 3 is a side view of the optical cage provided by an embodiment of the present application;

[0031] Figure 4 It is a top view of the optical cage provided by the embodiment of the present application;

[0032] Figure 5 It is a schematic structural diagram of the optical cage after placing the heat conduction device provided by the embodiment of the present application;

[0033] Figure 6 It is a schematic structural diagram of the optical module inserted into the optical cage provided by the embodiment of the present application;

[0034] Figure 7 It is the embodiment of the present application Figure 6 Cross-sectional view taken along line A-A;

[0035] Figure 8 It is a schematic structural diagram of the optical cage provided by another embodiment of the present application;

[0036] Figure 9 It is the embodiment of the present application Figure 8 Cross-sectional view taken along line B-B;

[0037] Figure 10 It is a schematic structural diagram of the optical module inserted into the optical cage provided by another embodiment of the present application;

[0038] Figure 11 It is the embodiment of the present application Figure 10 Cross-sectional view taken along line C-C;

[0039] Figure 12 It is the embodiment of the present application Figure 10 Cross-sectional view taken along line C-C;

[0040] Figure 13 It is a schematic diagram showing that the fourth wall surface and the outer wall surface of the first plug-in wall are coplanar in the second direction provided by the embodiment of the present application;

[0041] Figure 14 It is a schematic structural diagram of a communication device provided by another embodiment of the present application;

[0042] Figure 15 It is a schematic structural diagram of a circuit board provided by the embodiment of the present application;

[0043] Figure 16 It is a schematic structural diagram of a communication device provided by another embodiment provided by the embodiment of the present application. Detailed implementation manners

[0044] The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0045] For ease of understanding, the following first explains and describes the English abbreviations and related technical terms involved in the embodiments of the present application.

[0046] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0047] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The singular forms of "a", "the", and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0048] It should be understood that the term "and / or" used herein is only a description of the same field of related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the related objects before and after.

[0049] It should be understood that the "first", "second", etc. used in this application are only for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0050] In the description of this application, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0051] The "within... range" used in this application, unless otherwise specifically stated not to include the end values, by default includes the two end values of this range. For example, within the range of 1 to 5, both the values 1 and 5 are included.

[0052] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a contact connection or an integral connection; for those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] Communication technology has the advantages of high speed, long-distance transmission, and anti-interference, and is the mainstream technology in the communication field. Communication technology is widely used in communication devices such as switches, routers, and optical transmission equipment. Refer to Figure 1As shown, the communication device 10 may include a subrack 600, a circuit board 400, an optical cage 100, and an optical module 20. An installation cavity 610 is provided on the subrack 600, and the circuit board 400 is installed and fixed within the installation cavity 610. The optical cage 100 is provided on the circuit board 400. The optical cage 100 has an optical module interface for assembling the optical module 20. The optical module 20 is pluggably provided on the interface of the optical cage 100. The optical module 20 can convert an electrical signal into an optical signal or convert an optical signal into an electrical signal, and signal connections between communication devices are achieved through the optical module. There may be multiple installation cavities 610 in the communication device 10. Multiple circuit boards 400 are installed in the multiple installation cavities 610, and the multiple circuit boards 400 may be vertically or horizontally distributed in the installation cavity 610 in the thickness direction.

[0054] With the continuous development and upgrade of 4G and 5G networks, the deployment of optical modules is becoming increasingly dense, and more optical cages will be provided in communication devices. Currently, a partial opening is made in the middle of the top of the optical cage, and the radiator has a boss. The boss is inserted into the opening at the top of the optical cage to be fixedly connected to the optical cage. The radiator contacts the optical module through the boss and transfers heat. However, the radiator is provided on the top of the optical cage, and the radiator abuts against the upper cover plate of the optical cage, so that the radiator needs to increase a boss with a certain thickness to be inserted into the partial opening in the middle of the top of the optical cage to contact and dissipate heat from the optical module. Such a stacking method makes the height of the optical cage relatively large when stacked or the width relatively large when the optical cage is horizontally arranged, resulting in a relatively large volume of the communication device. This makes it a difficult problem to achieve a highly integrated optical cage layout in a limited space, and the stacking design of the radiator and the optical cage needs to be optimized. In addition, the capacity of the optical module in the communication device is continuously increasing, and the power consumption of the optical module has increased significantly. The heat dissipation effect when the radiator contacts and transfers heat from the optical module through the boss needs to be further improved.

[0055] The present application provides an optical cage 100. The optical module 20 can be plugged into the optical cage 100, and the optical cage 100 is used to protect and fix the optical module 20. The shape of the optical cage 100 may be a rectangular columnar structure.

[0056] Refer to Figures 2 to 4 As shown, Figure 2 is a schematic structural diagram of the optical cage provided by the present application, Figure 3 is a side view of the optical cage 100 provided by the present application, Figure 4 is a top view of the optical cage 100 provided by the present application.

[0057] The optical cage 100 includes a plug-in portion 110 and a receiving portion 120 that are adjacent to each other in a first direction. The first direction is Figure 2In the X direction (the first direction described below is the X direction), the receiving portion 120 is located on one side of the plugging portion 110 in the first direction. The plugging portion 110 includes a first plugging wall 111 and a second plugging wall 112 that are oppositely arranged, and also includes a third plugging wall 113 and a fourth plugging wall 114 that are oppositely arranged. The first plugging wall 111 and the second plugging wall 112 are oppositely arranged in the second direction, and the second direction is Figure 2 the Z direction in it (the second direction described below is the Z direction). The first plugging wall 111, the third plugging wall 113, the second plugging wall 112, and the fourth plugging wall 114 are sequentially connected and enclosed to form a jack 115 that penetrates along the first direction therebetween. The jack 115 is used to insert the optical module 20. The optical module 20 is inserted into the receiving portion 120 along the first direction. The plugging portion 110 and the receiving portion 120 can be integrally formed or detachably connected.

[0058] It can be understood that in some other embodiments, the first plugging wall 111, the third plugging wall 113, the second plugging wall 112, and the fourth plugging wall 114 can be sequentially bent from the same piece of material. Or, the first plugging wall 111, the third plugging wall 113, the second plugging wall 112, and the fourth plugging wall 114 can be formed by splicing four independent structures with each other. Among them, the third plugging wall 113 and the fourth plugging wall 114 can be a plate-like structure, a hollow mesh structure, or a fence structure. The present application does not limit this here. And, the third plugging wall 113 and the fourth plugging wall 114 can also be connecting columns connected to both sides of the first plugging wall 111 and the second plugging wall 112. In this case, the connecting columns are also fixed on both sides of the first plugging wall 111 and the second plugging wall 112 to perform a fixed connection in the side space on both sides of the first plugging wall 111 and the second plugging wall 112, which has the same connecting function as the plate-like or hollow mesh structure and also belongs to the structural scope of the plugging wall described in the present application.

[0059] The receiving portion 120 includes two side walls 122 that are oppositely arranged in the third direction, and the third direction is Figure 2 the Y direction in it (the third direction described below is the Y direction). It should be noted that the side walls 122 refer to all the side walls 122 on one side of the receiving portion 120 in the third direction. The side walls 122 on one side of the receiving portion 120 in the third direction can be one, or a combination of two or even more. There are two side walls 122 in the present application. There is a receiving cavity 121 for receiving the optical module between the two side walls 122, and the two side walls 122 are partial wall surfaces of the receiving cavity 121. The jack 115 and the receiving cavity 121 are in communication with each other along the first direction. The optical module is inserted into the receiving cavity 121 through the jack 115 along the first direction, so that the optical module can be plugged inside the optical cage 100.

[0060] The first edges 1221 of the two side walls 122 along the second direction enclose an opening 1222 on one side of the accommodating cavity 121 along the second direction. The first edges 1221 of the two side walls 122 along the second direction are partial side edges of the opening 1222. The opening 1222 and the accommodating cavity 121 communicate with each other along the second direction, and the opening 1222 is a part of the accommodating cavity 121.

[0061] Refer to Figure 3 As shown, along the second direction, the height H2 of at least a part of the first edge 1221 is lower than the height H1 of the outer wall surface of the first plugging wall 111. Along the second direction, at least a part of the first edge 1221 is located between the outer wall surface of the first plugging wall 111 and the outer wall surface of the second plugging wall 112. The outer wall surface of the first plugging wall 111 refers to the upper wall surface of the first plugging wall 111 along the second direction, and the outer wall surface of the second plugging wall 112 refers to the lower wall surface of the second plugging wall 112 along the opposite direction of the second direction. The position of the first edge 1221 in the second direction is lower than the position of the outer wall surface of the first plugging wall 111 in the second direction. The opening of the opening 1222 along the second direction is located on the side opposite to the second direction of the first plugging wall 111 ( Figure 2 in the opposite direction of Y in the figure).

[0062] Refer to Figure 5 and Figure 6 as shown, Figure 5 is a schematic structural diagram of the optical cage 100 provided by the present application after placing the heat conduction device 200. The heat conduction device 200 is arranged on one side of the optical cage 100 along the second direction (the Z direction in the figure). The heat conduction device 200 can be placed on the two side walls 122 and cover the opening of the opening 1222 along the second direction. The first edges 1221 of the two side walls 122 are used to contact and support the heat conduction device 200. When the optical module 20 is inserted into the optical cage 100, the heat conduction device 200 can dissipate heat from the side of the optical module 20 close to the heat conduction device 200 (the top of the optical module 20).

[0063] The heat conduction device 200 can be a structure similar to a stepped shape. Among them, the thickness of the structure of the heat conduction device 200 close to the plugging part 110 along the opposite direction of the second direction is lower than the thickness of the structure of the heat conduction device 200 far from the plugging part 110 along the opposite direction of the second direction. The side of the heat conduction device 200 in contact with the opening 1222 of the optical cage 100 is a planar structure.

[0064] Refer to Figure 3 、 Figure 6 and Figure 7 as shown, Figure 6 is a schematic structural diagram of the optical cage 100 provided by the present application after inserting the optical module 20, Figure 7 is Figure 6The sectional view taken along A-A. Exemplarily, in the present application, the optical module 20 may be an optical module of the QSFP28 type. The difference between the height H1 of the insertion portion 110 of the optical cage 100 and the height H2 of the first edge 1221 in the second direction may be greater than 1 millimeter. For example, the height difference may be 1.25 millimeters. Among them, the upper limit of the difference between the height H1 and the height H2 may be designed according to the structural strength of the side wall 122 and the positions of other structures on the side wall 122. Compared with the prior art in which the heat conduction device is inserted into the through hole at the top of the optical cage 100 through a boss, the overall height of the heat conduction device 200 and the optical cage 100 in the present application is reduced.

[0065] According to the heat conduction formula Q = ΔT·λ·S / L, where Q represents heat, ΔT represents temperature difference, R represents thermal resistance, L represents thickness, λ represents thermal conductivity, and S represents heat transfer area. The heat conduction device 200 is in direct contact with the optical module 20, and the side of the heat conduction device 200 in contact with the optical module 20 is a planar structure. The contact area (i.e., the heat transfer area S) is large, the thickness (L) of the heat conduction device 200 is low, the path of heat transfer is shortened, the amount of heat transferred during the heat exchange between the optical module 20 and the heat conduction device 200 is large, and more heat can be transferred from the optical module 20 to the heat conduction device 200, enhancing the heat conduction effect.

[0066] In the optical cage 100 provided in the present application, an opening 1222 for placing the heat conduction device 200 is provided at the accommodating portion 120 of the optical cage 100, and the first edge 1221 of the opening 1222 is lower in height than the first insertion wall 111. When the heat conduction device 200 is placed on the first edge 1221, since the first edge 1221 is lower in height than the first insertion wall 111, the overall height of the heat conduction device 200 and the optical cage 100 is reduced.

[0067] Particularly, for a high-capacity communication device with high-power optical modules 20 densely arranged, a plurality of optical cages 100 are stacked, and a plurality of optical modules 20 are inserted into the optical cages 100. Due to the reduction in the height of a single optical cage 100, the overall height of the communication device is significantly reduced when a plurality of optical cages 100 are stacked, so that more optical modules 20 can be arranged in a limited space, or the height of the communication device can be reduced when the same number of optical modules 20 are arranged. In addition, a plurality of optical modules 20 generate more heat. The optical modules 20 are in direct contact with the heat conduction device 200, and the heat dissipation effect is significantly improved, ensuring the stable operation of the system.

[0068] In a possible implementation manner, refer to Figures 2 to 4As shown, the accommodating portion 120 further includes a support plate 123, and the first insertion wall 111, the opening 1222, and the support plate 123 are arranged in sequence. Specifically, the first insertion wall 111, the opening 1222, and the support plate 123 are arranged in sequence along the first direction, and the support plate 123 is located on the side of the accommodating portion 120 away from the insertion portion 110.

[0069] The second edge 123a of the support plate 123 on the side close to the first insertion wall 111 is part of the side edge of the opening 1222. The second edge 123a of the support plate 123 on the side close to the first insertion wall 111 and the first edges 1221 of the two side walls 122 along the second direction are the components of the opening of the opening 1222. At least part of the outer wall surface of the support plate 123 on one side in the second direction is the first wall surface 1231a, and the first wall surface 1231a is used to contact and support the heat conduction device 200. Along the second direction, the height of the first wall surface 1231a is lower than the height of the outer wall surface of the first insertion wall 111, and the first wall surface 1231a is located between the outer wall surface of the first insertion wall 111 and the outer wall surface of the second insertion wall 112. The position of the first wall surface 1231a along the second direction is lower than the position of the outer wall surface of the first insertion wall 111 along the second direction.

[0070] The support plate 123 is used to support the heat conduction device 200, and the first wall surface 1231a of the support plate 123 contacts the heat conduction device 200 to achieve the purpose of supporting the heat conduction device 200. The height of the first wall surface 1231a along the second direction being lower than the outer wall surface of the first insertion wall 111 enables the overall height of the optical cage 100 and the heat conduction device 200 to be reduced while being able to support the heat conduction device 200.

[0071] In a possible implementation manner, the outer wall surface of the support plate 123 on one side in the second direction is the first wall surface 1231a, the first wall surface 1231a is parallel to the outer wall surface of the first insertion wall 111, the first wall surface 1231a is used to contact and support the heat conduction device 200, and along the second direction, the height of the first wall surface 1231a is lower than the height of the outer wall surface of the first insertion wall 111. The first wall surface 1231a being parallel to the outer wall surface of the first insertion wall 111 and the height of the first wall surface 1231a being lower than the height of the outer wall surface of the first insertion wall 111 along the second direction make the overall height of the support plate 123 lower than the height of the outer wall surface of the first insertion wall 111. The support plate 123 can support the heat conduction device 200, and when the heat conduction device 200 is installed on the optical cage 100, the overall height of the heat conduction device 200 and the optical cage 100 decreases.

[0072] In a possible implementation manner, refer to Figure 8 and Figure 9As shown, the support plate 123 includes a first part 1231 and a second part 1232 that are adjacent along the third direction. The first wall surface 1231a is the outer wall surface of the first part 1231 along the second direction. The inner wall surface of the first part 1231 on the side opposite to the second direction is the second wall surface 1231b. The inner wall surface of the second part 1232 on the side opposite to the second direction is the third wall surface 1232a. The third wall surface 1232a is located on one side of the second wall surface 1231b along the second direction to form a stepped structure.

[0073] In a possible implementation manner, refer to Figure 8 As shown, the outer wall surface of the second part 1232 on one side along the second direction is the fourth wall surface 1232b. The fourth wall surface 1232b is located on one side of the first wall surface 1231a along the second direction. The second part 1232 protrudes relative to the first part 1231 along the second direction. There may be two second parts 1232 as described in this implementation manner, and the two second parts 1232 are respectively located on both sides of the first part 1231 along the third direction; or there may be only one second part 1232, and the second part 1232 is adjacent to the first part 1231 along the third direction. The support plate 123 can be formed by bending a whole sheet of material, and the structure where the first part 1231 is lower than the second part 1232 is presented on the outside. The first part 1231 is located on the side of the second part 1232 opposite to the second direction and can better match the optical module 20 of the QSFPDD type. In addition, structures such as the heat pipe of the heat conduction device can be arranged in the sunken part of the first part 1231 to improve the heat conduction efficiency of the heat conduction device.

[0074] In a possible implementation manner, refer to Figure 13 As shown, along the second direction, the fourth wall surface 1232b and the outer wall surface of the first insertion wall 111 along the second direction are coplanar, that is, the plane where the fourth wall surface 1232b is located and the plane where the outer wall surface of the first insertion wall 111 along the second direction is located are coplanar. When the optical module of the QSFPDD type is inserted into the optical cage 100, the optical module of the QSFPDD type is relatively long. The fourth wall surface 1232b and the outer wall surface of the first insertion wall 111 along the second direction are coplanar to ensure that the optical module of the QSFPDD type can be inserted into the optical cage 100. Figure 10 It is a schematic diagram for the optical module of the QSFPDD type to be inserted into the optical cage 100.

[0075] In a possible implementation manner, refer to Figure 9As shown, the width W of the first wall surface 1231a in the third direction is greater than 7 mm. In one embodiment, the width of the first wall surface 1231a in the third direction is 8.5 mm. The heat conduction device 200 can be added with heat pipes, and the heat pipes can be arranged inside the heat conduction device 200 by means of welding fixation, etc., to form a heat conduction device including heat pipes. The distance between the first wall surface 1231a in the second direction and the fourth wall surface 1232b provides space for arranging heat pipes inside the heat conduction device 200, and can place a part of the heat conduction device with heat pipes arranged inside. Arranging heat pipes inside the heat conduction device 200 can improve the heat dissipation efficiency of the heat conduction device 200 and bring a better heat dissipation effect to the heat dissipation of the optical module 20.

[0076] In a possible implementation manner, referring to Figure 12 As shown, an electromagnetic wave absorbing structure 124 is provided on the side of the support plate 123 opposite to the second direction, and the electromagnetic wave absorbing structure 124 is used to absorb electromagnetic radiation. The electromagnetic wave absorbing structure 124 can absorb the radiated electromagnetic waves generated by electromagnetic compatibility devices, reduce electromagnetic interference, and avoid the influence of the radiated electromagnetic waves of electromagnetic compatibility devices on the functions of other communication devices (which can be optical modules, routers, switches, etc. in other optical cages within the same communication device). The electromagnetic wave absorbing structure 124 can be attached to the side of the support plate 123 opposite to the second direction. Among them, the electromagnetic wave absorbing structure 124 can be completely attached to the side of the support plate 123 opposite to the second direction, or only partially attached to the side of the support plate 123 opposite to the second direction. The materials for making the electromagnetic wave absorbing structure 124 can include but are not limited to carbon fiber, polyaniline, and iron.

[0077] In a possible implementation manner, the thickness of the second edge 123a in the second direction is in the range of 0.35 mm to 0.5 mm. When the optical module 20 is inserted into the optical cage 100, the second edge 123a (the wall surface of the support plate 123 close to the opening 1222) can abut against the optical module 20, and the thickness of the second edge 123a in the second direction in the range of 0.35 mm to 0.5 mm can better abut against the optical module 20, limit the optical module 20, and ensure that the optical module and the connector can be accurately positioned and connected.

[0078] In one embodiment, the thickness of the second edge 123a of the support plate 123 in the second direction is in the range of 0.35 mm to 0.5 mm, and the remaining edge thicknesses of the support plate 123 are equal and are all less than the thickness of the second edge 123a in the second direction. That is, only the edge of the support plate 123 that abuts against the optical module 20 is thickened, and the second edge 123a limits the optical module 20.

[0079] In one embodiment, the thickness of the second edge 123a of the support plate 123 and other edges of the support plate 123 along the second direction are in the range of 0.35 mm to 0.5 mm. The thickness of all sides of the support plate 123 along the second direction are equal, so as to limit the optical module 20.

[0080] In a possible implementation, at least one side wall 122 is provided with a first protrusion 1223, which extends from the side wall 122 to a side away from the accommodating cavity 121. The first protrusion 1223 has a supporting surface 1223a on one side along the second direction, and the supporting surface 1223a is used to support the heat conducting device 200.

[0081] In one embodiment, see Figures 2 to 4 As shown, the two side walls 122 of the accommodating portion 120 are provided with a first protrusion 1223 on one side of the second direction. The two first protrusions 1223 can be an integral structure with the two side walls 122, or the two first protrusions 1223 can be fixedly connected to the two side walls 122 by welding or the like. The first protrusions 1223 on each side wall 122 extend from the side wall 122 to the side away from the accommodating cavity 121, and the first protrusions 1223 can extend along the second direction. The two first protrusions 1223 continue to bend in the direction away from each other in the third direction, and the first protrusions 1223 form a support surface 1223a on one side along the second direction, and the plane where the support surface 1223a is located can be perpendicular to the plane where the side wall 122 is located. The width of the support surface 1223a along the third direction can be greater than the width of the first edge 1221 along the third direction, and the support surface 1223a can assist the two side walls 122 in supporting the heat conducting device, providing more support area for the heat conducting device.

[0082] In one possible implementation, see Figure 3 As shown, along the second direction, the height of the support surface 1223a is lower than the height of the outer wall surface of the first plug-in wall 111, and the support surface 1223a is located between the outer wall surface of the first plug-in wall 111 and the outer wall surface of the second plug-in wall 112. The support surface 1223a can both support the heat-conducting device 200 and ensure that when the heat-conducting device 200 is installed on the optical cage 100, the overall height of the heat-conducting device 200 and the optical cage 100 is reduced.

[0083] In one possible implementation, see Figure 3 As shown, a limiting structure 1225 is provided on one side of the side wall 122 in the second direction, and a portion of the limiting structure 1225 extends into the accommodating cavity 121 for abutting against the optical module 20 along the first direction.

[0084] In one embodiment, see Figure 3As shown, limiting structures 1225 are provided on one side of the two side walls 122 of the accommodating portion 120 in the second direction. The two limiting structures 1225 can be integrally formed with the two side walls 122 respectively, or the two limiting structures 1225 can be fixedly connected to the two side walls 122 respectively by means such as welding. The limiting structure 1225 on each side wall 122 can partially extend into the accommodating cavity 121, and the part of the limiting structure 1225 extending into the accommodating cavity 121 is used to abut against the optical module in the first direction, so as to limit the insertion depth of the optical module in the optical cage, limit the position of the optical module inserted into the optical cage in the first direction, and enable the optical module and the connector to be accurately positioned and connected.

[0085] In a possible implementation manner, the limiting structure 1225 includes a second protrusion 1222a extending from the first edge 1221 in the second direction, and the free end of the second protrusion 1222a is bent toward the side close to the accommodating cavity 121. Specifically, in one embodiment, refer to Figure 2 and Figure 3 As shown, the limiting structure 1225 includes a second protrusion 1222a extending from the first edge 1221 in the second direction, and the free end of the second protrusion 1222a is bent toward the side close to the accommodating cavity 121. The free end of the second protrusion 1222a can be the structure where the second protrusion 1222a is not connected to the first edge 1221. There can be two second protrusions 1222a, and the free ends of the two second protrusions 1222a are both bent toward the side close to the accommodating cavity 121 to form a structure similar to a C shape, and this structure can match the groove on the optical module. When the optical module is inserted into the optical cage, the second protrusion 1222a can be inserted into the groove on the optical module to limit the optical module, ensure the accurate insertion position of the optical module in the optical cage, and improve the connection stability between the optical module and the optical cage.

[0086] In a possible implementation manner, a heat dissipation structure can also be provided on one side of the heat conduction device 200 in the second direction. For example, in this embodiment, there can be two heat dissipation structures. Of course, in other embodiments, there can be only one heat dissipation structure or more than two. The heat dissipation structure can be made of metal (such as copper, aluminum, etc.), and the heat dissipation structure can be heat dissipation fins. The heat dissipation fins can increase the heat dissipation area of the heat conduction device 200 and improve the heat dissipation efficiency of the heat conduction device 200.

[0087] This application provides a communication device 10, and the communication device 10 can include but is not limited to: any communication device that needs to be connected to an optical module, such as a switch, a server, a router, an optical access product, an optical transmission device, and an optical transport device, etc. Exemplarily, the communication device 10 in the implementation manner of this application can be a switch.

[0088] The communication device 10 may include a heat conduction device 200 and the optical cage 100 described in any of the above embodiments. The heat conduction device 200 is disposed on the opening 1222 on one side of the optical cage 100 along the second direction and covers the opening 1222. The heat conduction device 200 is in contact connection with the first edge 1221 of the optical cage 100. At least part of the height of the first edge 1221 in the second direction is lower than the height of the outer wall surface of the first plugging wall 111. At least part of the heat conduction device 200 is located on the side opposite to the outer wall surface of the first plugging wall 111 along the reverse direction of the second direction. After the heat conduction device 200 is in contact with the first edge 1221, the side of the heat conduction device 200 facing the opening 1222 is located on the side opposite to the outer wall surface of the first plugging wall 111 along the reverse direction of the second direction.

[0089] The communication device 10 provided in this application is installed with an optical cage 100. When the heat conduction device 200 is installed on the optical cage 100, it is in contact with the opening 1222 of the optical cage 100. The height of the first edge 1221 of the opening 1222 in the second direction is lower than the height of the outer wall surface of the first plugging wall, and the overall thickness of the optical cage 100 and the heat conduction device 200 can be reduced. Especially when a plurality of optical cages 100 are provided in the communication device 10, a plurality of optical modules 20 are respectively installed in the optical cages 100, so that the overall width of the communication device 10 provided with a plurality of optical cages 100 is effectively reduced, and thus more optical cages can be provided in a limited space. In addition, the heat conduction device 200 can be directly in contact with the optical module 20, effectively improving the heat dissipation effect.

[0090] In a possible implementation manner, referring to Figure 10 and Figure 11 as shown, the communication device 10 further includes an elastic member 300. The elastic member 300 connects the optical cage 100 and the heat conduction device 200 to apply an elastic force to the heat conduction device 200 toward the optical cage 100 along the reverse direction of the second direction. Both ends of the elastic member 300 are connected to two side walls of the optical cage 100. The elastic member 300 can fix the heat conduction device 200 on the optical cage 100. The optical cage 100 and the heat conduction device 200 are detachably connected. Along the second direction, the heat conduction device 200 moves relative to the optical cage 100. The heat conduction device 200 can move up and down relative to the optical cage 100 in the second direction. When the optical module 20 is inserted into the optical cage 100, it can contact the side of the heat conduction device 200 facing the opening 1222 and cause the heat conduction device 200 to move toward the second direction, so that the heat conduction device 200 and the optical module 20 are better fitted, improving the heat dissipation effect.

[0091] When the optical module 20 is inserted into the optical cage 100, the elastic member 300 can apply an elastic force in the opposite direction of the second direction to the heat conduction device 200, causing the heat conduction device 200 to move toward one side of the optical cage 100 and preventing the heat conduction device 200 from moving too much in the second direction. The elastic member 300 can limit the heat conduction device 200 in the second direction, ensuring better connection between the heat conduction device 200 and the optical cage 100, and further better fitting with the optical module 20 to improve the heat dissipation effect.

[0092] In a possible implementation manner, the communication device 10 further includes a circuit board 400. The optical cage 100 and the circuit board 400 are fixedly connected, and at least one optical cage 100 is installed on the circuit board 400. At least one circuit board 400 is provided in the communication device 10.

[0093] In one embodiment, referring to Figure 14 and Figure 15 as shown, only one circuit board 400 is included in the communication device 10. The communication device 10 may include a housing 800, and the circuit board 400 is located inside the housing 800. The optical cage 100 is installed on the circuit board 400. Specifically, the optical cage 100 has a plug-in member 1224, and the plug-in member 1224 is located on the side opposite to the second direction of the side wall 122. The plug-in member 1224 and the mounting hole 410 on the circuit board 400 are arranged oppositely. During assembly, an extrusion force in the opposite direction of the second direction is applied to the optical cage 100, so that the plug-in member 1224 is inserted into the mounting hole 410 to install the optical cage 100 on the circuit board 400. Figure 14 shows that 8 optical cages 100 are installed on the circuit board 400, and the heat conduction device 200 is installed on one side of the optical cage 100 in the second direction. The optical modules 20 are inserted into the optical cages 100 one by one. When the optical modules 20 work, the heat conduction device 200 dissipates heat from the optical modules 20. It can be understood that multiple circuit boards 400 may also be provided in the communication device 10, and corresponding descriptions are given below.

[0094] In a possible implementation manner, referring to Figure 12 as shown, the communication device 10 further includes a connector 500. The connector 500 is located inside the optical cage 100, and each optical cage 100 is installed with a connector 500 one by one. The connector 500 is electrically connected to the circuit board 400, and there are various optional implementation manners for the electrical connection between the connector 500 and the circuit board 400. For example, the connector 500 and the circuit board 400 are connected by a combination of pins and sockets, or by a flexible cable. The connector 500 is used to electrically connect to the optical module 20. The optical module 20 is inserted into the optical cage 100 through the insertion part 110 from outside the communication device 10, and the optical module 20 and the connector 500 are plugged in to achieve electrical connection. A heat conduction device 200 is provided on the top of the optical cage 100 to dissipate heat from the top of the optical module 20.

[0095] In a possible implementation, referring to Figure 16 as shown, the communication device 10 includes a sub-rack 600. An installation cavity 610 is provided on the sub-rack 600, and the circuit board 400 is installed and fixed within the installation cavity 610.

[0096] In one embodiment, the number of installation cavities 610 is at least one. A plurality of installation cavities 610 can be provided within the sub-rack 600, and at least one circuit board 400 is provided within a single installation cavity. This embodiment is described Figure 16 by way of example. There are 12 installation cavities 610 provided on the sub-rack. One circuit board 400 is provided within each installation cavity 610, and the circuit board 400 is vertically placed inside the communication device 10. An optical cage 100 is provided on each circuit board 400, and an optical module 20 is plugged into each optical cage 100. The heat conduction device 200 is provided on one side of the optical cage 100 along the third direction and is in contact with the opening 1222 of the optical cage 100. The height of the first edge 1221 of the opening 1222 in the third direction is lower than the height of the outer wall surface of the first plugging wall. When the heat conduction device 200 is provided on the optical cage 100, the overall thickness of the optical cage 100 and the heat conduction device 200 can be reduced, and thus the overall width of the communication device 10 provided with a plurality of optical cages 100 is effectively reduced. In addition, the heat conduction device 200 can be directly in contact with the optical module 20, effectively improving the heat dissipation effect.

[0097] The present application provides a heat conduction device 200. Referring to Figure 10 、 Figure 11 and Figure 12 as shown, the heat conduction device 200 can be a structure similar to a stepped shape. Among them, the thickness of the structure of the heat conduction device 200 on the side close to the plugging portion 110 along the reverse direction of the second direction is lower than the thickness of the structure of the heat conduction device 200 on the side far from the plugging portion 110 along the reverse direction of the second direction. That is, the thickness of the portion of the heat conduction device 200 in contact with the optical cage 100 along the reverse direction of the second direction is smaller. The heat conduction device 200 has a heat conduction surface 210, and the heat conduction surface 210 is a planar structure. The heat conduction surface 210 is used to be in contact with the first edge 1221 of the optical cage 100 and the optical module 20. The heat conduction surface 210 is the side of the heat conduction device 200 facing the optical cage 100 and in contact with the first edge 1221 of the optical cage 100 and the optical module 20. The heat conduction device 200 exchanges heat with the optical module 20 through the heat conduction surface 210 to achieve the effect of dissipating heat from the optical module 20. The heat conduction surface 210 can be directly in contact with the optical module, and the thickness of the portion of the heat conduction device 200 in contact with the optical module 20 is small, which can better dissipate heat from the optical module and improve the heat dissipation effect.

[0098] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A light cage, characterized in that, The optical module comprises a plug-in portion and a receiving portion adjacent to each other along a first direction, wherein the plug-in portion comprises a first plug-in wall and a second plug-in wall arranged opposite to each other, and further comprises a third plug-in wall and a fourth plug-in wall arranged opposite to each other, wherein the first plug-in wall is located on one side of the second plug-in wall in the second direction, and the first plug-in wall, the third plug-in wall, the second plug-in wall and the fourth plug-in wall are sequentially connected and enclosed to form a plug hole penetrating along the first direction, and the plug hole is used to insert an optical module; The accommodating portion includes two side walls arranged opposite to each other along the third direction, a accommodating cavity for accommodating the optical module is provided between the two side walls, the insertion hole and the accommodating cavity are connected along the first direction, and the first edges of the two side walls along the second direction enclose an opening on one side of the accommodating cavity along the second direction, and the first edge is used to contact and support the heat conducting device; Along the second direction, a height of at least a portion of the first edge is lower than a height of an outer wall surface of the first inserting wall.

2. The optical cage according to claim 1, characterized in that, The accommodating portion further includes a support plate, the first plug-in wall, the opening and the support plate are arranged in sequence, and a second edge of the support plate on a side close to the first plug-in wall is a partial side edge of the opening; At least part of the outer wall surface of the support plate on one side of the second direction is a first wall surface, and the first wall surface is used for contacting and supporting the heat conducting device. Along the second direction, the height of the first wall surface is lower than the height of the outer wall surface of the first plug-in wall.

3. The optical cage according to claim 2, wherein, The outer wall surface of the support plate on one side of the second direction is a first wall surface, and the first wall surface is used for contacting and supporting the heat conducting device. Along the second direction, the height of the first wall surface is lower than the height of the outer wall surface of the first plug-in wall.

4. The optical cage according to claim 2, wherein The support plate includes a first part and a second part adjacent to each other along the third direction, the first wall surface is the outer wall surface of the first part along the second direction, the inner wall surface of the first part on the side opposite to the second direction is the second wall surface, the inner wall surface of the second part on the side opposite to the second direction is the third wall surface, and the third wall surface is located on one side of the second wall surface along the second direction to form a step structure.

5. The optical cage according to claim 4, characterized in that, An outer wall surface of the second portion along one side of the second direction is a fourth wall surface, and the fourth wall surface is located on one side of the first wall surface along the second direction. The second portion protrudes relative to the first portion along the second direction.

6. The optical cage according to claim 5, wherein Along the second direction, the fourth wall surface and the outer wall surface of the first plug-in wall along the second direction are coplanar.

7. The optical cage according to claim 5 or 6, characterized in that, The width of the first wall surface along the third direction is greater than 7 mm.

8. The optical cage according to any one of claims 2-7, characterized in that, The support plate is provided with a wave absorbing structure on one side of the support plate in the opposite direction to the second direction, and the wave absorbing structure is used for absorbing electromagnetic radiation.

9. The photocage according to any one of claims 2-8, characterized in that, A thickness of the second edge along the second direction is in a range from 0.35 mm to 0.5 mm.

10. The optical cage according to any one of claims 1-9, characterized in that, A first protrusion is provided on at least one of the side walls, and the first protrusion extends from the side wall to a side away from the accommodating cavity; the first protrusion has a supporting surface on one side along the second direction, and the supporting surface is used to support the heat conducting device.

11. The optical cage according to claim 10, wherein, Along the second direction, the height of the supporting surface is lower than the height of the outer wall surface of the first inserting wall.

12. The optical cage according to any one of claims 1-11, characterized in that, The side wall is provided with a limiting structure on one side in the second direction, and the limiting structure partially extends into the accommodating cavity for abutting against the optical module along the first direction.

13. The optical cage according to claim 12, characterized in that, The limiting structure includes a second protrusion extending from the first edge in the second direction, and the free end of the second protrusion is bent toward the side close to the accommodating cavity.

14. A communication device, characterized in that, It includes a heat conduction device and the optical cage according to any one of claims 1-13. At least part of the heat conduction device is located on the outer wall surface of the first insertion wall on the side opposite to the second direction. The heat conduction device covers the opening and is in contact connection with the first edge of the optical cage.

15. The communication device according to claim 14, characterized in that, The communication device further includes an elastic member. The elastic member connects the optical cage and the heat conduction device. The optical cage and the heat conduction device are detachably connected. Along the second direction, the heat conduction device moves relative to the optical cage, and the elastic member is used to apply an elastic force toward the optical cage side to the heat conduction device along the opposite direction of the second direction.

16. A heat conduction device, characterized in that, It has a heat conduction surface, and the heat conduction surface is a planar structure. The heat conduction surface is used to contact the first edge of the optical cage and the optical module.

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