Cage and cage assembly

Abstract

The present invention provides a cage which is mounted on the front surface of a substrate, into which a plurality of external devices are inserted in a depth direction substantially orthogonal to the front surface, and which accommodates the plurality of external devices, the cage comprising at least one vertical unit, the vertical unit defines a port group in which a plurality of ports, which are spaces for accommodating external devices, are arranged in a row in the vertical direction, and includes: two vertical plates which extend in the vertical direction over the entire height of the port group in the vertical direction, face each other in the horizontal direction, and are disposed at a distance corresponding to the width of the ports in the horizontal direction; and a plurality of lateral plates extending in the lateral direction, disposed between the longitudinal plates, and disposed facing each other in the longitudinal direction, in the longitudinal unit, the plurality of ports included in the port group are demarcated by the two longitudinal plates and the plurality of lateral plates.

Description

Technical Field

[0001] The present disclosure relates to a cage and a cage assembly. Background Art

[0002] For example, in an optical module (also referred to as an optical transceiver) that converts an electrical signal and an optical signal into each other, the following situation exists: it is mounted on a printed wiring board in a state of being accommodated in a cage and is electrically connected to an ASIC (application specific integrated circuit).

[0003] Patent Document 1 (US20220087070A1) discloses an example of a cage that houses a plurality of optical modules.

[0004] In addition, there is a case where a heat sink for cooling each optical module is accommodated in the cage.

[0005] Actually, a plurality of optical modules (and a plurality of heat sinks) are accommodated in a plurality of ports provided in the cage.

[0006] At this time, there is a case where the plurality of ports are composed of a plurality of types of plates. For example, there is the following situation: a plurality of longitudinal plates extending along the longitudinal direction D2 and a plurality of transverse plates extending along the transverse direction D3 are combined to form the plurality of ports.

[0007] However, if the plurality of types of plates cannot be properly combined, there is a case where each plate is bent.

[0008] Therefore, an object of the present disclosure is to provide a cage and a cage assembly having a structure in which plates are less likely to bend. Summary of the Invention

[0009] In order to solve the above problems, the cage and the cage assembly of the present disclosure adopt the following means.

[0010] The cage according to the first aspect of the present disclosure is mounted on a first surface of an external substrate, and a plurality of external devices are inserted along a depth direction substantially orthogonal to the first surface and accommodated therein. A direction orthogonal to the depth direction is defined as a longitudinal direction, and a direction orthogonal to the depth direction and the longitudinal direction is defined as a transverse direction. The cage includes at least one longitudinal unit, and the longitudinal unit defines a port group in which a plurality of ports serving as spaces for accommodating the external devices are arranged in a row along the longitudinal direction. The longitudinal unit includes: two longitudinal plates that extend along the longitudinal direction, cover the entire height of the port group in the longitudinal direction, and are arranged so as to face each other in the transverse direction and be separated by a distance corresponding to the transverse width of the port; and a plurality of transverse plates that extend along the transverse direction, are arranged between the longitudinal plates, and are arranged so as to face each other in the longitudinal direction. In the longitudinal unit, the plurality of ports included in the port group are defined by the two longitudinal plates and the plurality of transverse plates.

[0011] The cage according to this aspect has at least one longitudinal unit. The longitudinal unit defines a port group in which a plurality of ports serving as spaces for accommodating external devices are arranged in a row along the longitudinal direction. The longitudinal unit includes: two longitudinal plates that extend along the longitudinal direction, cover the entire height in the longitudinal direction of the port group, and are arranged in a manner that faces each other in the transverse direction and are separated by a distance corresponding to the transverse width of the port; and a plurality of transverse plates that extend along the transverse direction, are arranged between the longitudinal plates, and are arranged facing each other in the longitudinal direction. In the longitudinal unit, the plurality of ports included in the port group are defined by the two longitudinal plates and the plurality of transverse plates. Therefore, by making the longitudinal plates function as the longitudinal wall bodies of the port group (i.e., the longitudinal wall bodies common to all the ports arranged in a row along the longitudinal direction), and making the transverse plates function as the transverse wall bodies of each port included in the port group, the transverse dimension of the transverse plates can be made substantially the same as the dimension corresponding to the transverse dimension of one port. Therefore, the transverse dimension of the transverse plates can be suppressed to the minimum. As a result, it is difficult for the transverse plates to bend in the longitudinal direction.

[0012] In addition, a port group composed of a plurality of ports arranged in a row along the longitudinal direction can be unitized into a longitudinal unit. As a result, by simply changing the number of longitudinal units arranged in the transverse direction, the number of ports / port groups can be easily increased or decreased.

[0013] In addition, in the cage according to the second aspect of the present disclosure, in the first aspect, the number of the longitudinal units is plural, and the plural longitudinal units are arranged in a row along the transverse direction. In the plural longitudinal units arranged in a row along the transverse direction, a gap serving as a space that does not accommodate the external device is defined between a first longitudinal unit and a second longitudinal unit adjacent to the first longitudinal unit in the transverse direction. The gap includes: a rear surface opening that faces the external substrate; and a front surface opening that is located on the opposite side of the rear surface opening.

[0014] According to the cage of this aspect, a plurality of longitudinal units are arranged in a row along the transverse direction. In the plurality of longitudinal units arranged in a row along the transverse direction, a gap serving as a space that does not accommodate the external device is defined between the first longitudinal unit and the second longitudinal unit. The gap includes: a rear surface opening that faces the external substrate; and a front surface opening that is located on the opposite side of the rear surface opening. Therefore, for example, the gap can be used as a flow path to allow the cooling air to flow from the front surface opening to the rear surface opening. Therefore, the external devices accommodated in the ports can be cooled by the air flowing through the gap adjacent to the ports. In addition, a space can be forcibly partitioned between the external devices along the transverse direction, so a structure in which heat is difficult to stay can be formed.

[0015] In addition, in the second mode of the present disclosure, the cage involved in the third mode includes at least one front surface panel that covers the front surface opening of the gap and is fixed to the leading edge of one of the longitudinal plates of the first longitudinal unit and the leading edge of one of the longitudinal plates of the second longitudinal unit facing each other across the gap.

[0016] According to the cage involved in this mode, since the front surface panel covers the front surface opening of the gap and is fixed to the leading edge of one of the longitudinal plates of the first longitudinal unit and the leading edge of one of the longitudinal plates of the second longitudinal unit facing each other across the gap, the first longitudinal unit and the second longitudinal unit can be joined by the front surface panel.

[0017] In addition, since two longitudinal plates facing each other across the gap (two longitudinal plates belonging to different longitudinal units) are fixed by the front surface panel, it is difficult for each longitudinal plate to bend laterally.

[0018] In addition, in the third mode of the cage involved in the fourth mode of the present disclosure, the front surface panel has a plurality of communication holes that communicate the outside and the gap.

[0019] According to the cage involved in this mode, since the front surface panel has a plurality of communication holes that communicate the outside and the gap, when the front surface panel is provided, the cooling air easily flows into the gap, and the cooling of the external device can be promoted.

[0020] In addition, in the third mode or the fourth mode of the cage involved in the fifth mode of the present disclosure, there are a plurality of EMI fingers, and the EMI fingers are installed at the leading edge in a state of sandwiching both sides of the longitudinal plate, and the front surface panel is made of metal and contacts the EMI fingers.

[0021] According to the cage involved in this mode, since the EMI fingers are installed at the leading edge in a state of sandwiching both sides of the longitudinal plate, and the front surface panel is made of metal and contacts the EMI fingers, the shielding performance against noise leaking from the gap can be improved when there is a gap between the longitudinal units.

[0022] In addition, in any one of the first mode to the fifth mode of the cage involved in the sixth mode of the present disclosure, a plurality of the longitudinal plates have fixing portions that protrude along the depth direction from the trailing edge of the longitudinal plate facing the external substrate and can be fixed to the external substrate.

[0023] According to the cage involved in this mode, since the fixing portion protrudes along the depth direction from the trailing edge of the longitudinal plate facing the external substrate and can be fixed to the external substrate, each longitudinal unit and the external substrate can be firmly fixed. Thus, for example, when inserting or removing an external device, the external substrate is difficult to bend.

[0024] In addition, two longitudinal plates facing each other across a gap (two longitudinal plates belonging to different longitudinal units) are fixed by an external substrate, so it is difficult for each longitudinal plate to bend laterally.

[0025] In addition, each longitudinal unit can be positioned relative to the external substrate, so the assembly property of the cage can be improved.

[0026] In addition, in the cage according to the seventh aspect of the present disclosure, in the sixth aspect, the fixing portion is a press - fit pin press - fitted into the external substrate.

[0027] According to the cage of this aspect, since the fixing portion is a press - fit pin press - fitted into the external substrate, the longitudinal plate can be simply fixed to the external substrate.

[0028] In addition, in the cage according to the eighth aspect of the present disclosure, in any one of the first to seventh aspects, the plurality of transverse plates have a plurality of communication holes that communicate the upper surface and the lower surface of the transverse plate.

[0029] According to the cage of this aspect, the transverse plate has a plurality of communication holes that communicate the upper surface and the lower surface of the transverse plate. Therefore, air easily circulates between adjacent ports in the longitudinal direction, and the cooling of external devices can be promoted.

[0030] In addition, in the cage according to the ninth aspect of the present disclosure, in any one of the first to eighth aspects, the external device is an optical module or an optical module and a heat sink for cooling the optical module.

[0031] According to the cage of this aspect, the external device is an optical module or an optical module and a heat sink for cooling the optical module.

[0032] In addition, in the cage according to the tenth aspect of the present disclosure, in the ninth aspect, among the plurality of ports arranged in a row along the longitudinal direction, the first port is the port for accommodating the optical module, and the second port adjacent to the first port in the longitudinal direction and located above the first port is the port for accommodating the heat sink. The transverse plate separating the first port and the second port has a through - opening that communicates the first port and the second port.

[0033] The first port is the port for accommodating the optical module, the second port adjacent to the first port in the longitudinal direction and located above the first port is the port for accommodating the heat sink. The transverse plate separating the first port and the second port has a through - opening that communicates the first port and the second port. Therefore, a part of the heat sink accommodated in the second port can contact the optical module accommodated in the first port via the through - opening. Thus, the optical module can be cooled by the heat sink.

[0034] In addition, in any one of the first to tenth aspects of the present disclosure, the cage rack according to the eleventh aspect includes a top plate and a bottom plate. A set of a plurality of the longitudinal units arranged in a row along the transverse direction is defined as a unit group. The top plate is fixed to the upper edges of the respective longitudinal plates of the plurality of longitudinal units included in the unit group over the entire width of the transverse direction of the unit group, and the bottom plate is fixed to the lower edges of the respective longitudinal plates of the plurality of longitudinal units included in the unit group over the entire width of the transverse direction of the unit group.

[0035] The cage rack according to this aspect includes a top plate and a bottom plate. A set of a plurality of longitudinal units arranged in a row along the transverse direction is defined as a unit group. The top plate is fixed to the upper edges of the respective longitudinal plates of the plurality of longitudinal units included in the unit group over the entire width of the transverse direction of the unit group, and the bottom plate is fixed to the lower edges of the respective longitudinal plates of the plurality of longitudinal units included in the unit group over the entire width of the transverse direction of the unit group. Therefore, the structure of the longitudinal unit can be maintained unchanged, and a cage rack obtained by arranging any number of longitudinal units along the transverse direction can be formed only by preparing in advance a top plate and a bottom plate with different dimensions (specifically, transverse dimensions). Thus, it is possible to easily perform the deformation and expansion of cage racks with different numbers of ports.

[0036] In addition, in the cage rack according to the twelfth aspect of the present disclosure, in the eleventh aspect, the top plate and / or the bottom plate has a fixing portion that protrudes along the depth direction from the trailing edge of the top plate and / or the bottom plate facing the external substrate and can be fixed to the external substrate.

[0037] According to the cage rack of this aspect, the fixing portion protrudes along the depth direction from the trailing edge of the top plate and / or the bottom plate facing the external substrate and can be fixed to the external substrate. Therefore, each longitudinal unit and the external substrate can be firmly fixed. Thus, for example, the external substrate is difficult to bend when inserting or removing an external device.

[0038] In addition, in the cage rack according to the thirteenth aspect of the present disclosure, in the twelfth aspect, the fixing portion is a press-fit pin that is pressed into the external substrate.

[0039] According to the cage rack of this aspect, the fixing portion is a press-fit pin that is pressed into the external substrate. Therefore, the top plate and / or the bottom plate can be simply fixed to the external substrate.

[0040] In addition, in the cage rack according to the fourteenth aspect of the present disclosure, in any one of the eleventh to thirteenth aspects, the bottom plate has a plurality of communication holes.

[0041] The communication holes communicate the upper surface and the lower surface of the bottom plate.

[0042] According to the cage rack related to this embodiment, the bottom plate has a plurality of communication holes that connect the upper surface and the lower surface of the bottom plate. Therefore, air can easily flow out from the ports located at the lowermost layer, which can promote the cooling of external devices.

[0043] In addition, the cage rack assembly related to the fifteenth embodiment of the present disclosure includes: the cage rack described in any one of the first to fourteenth embodiments; and a substrate as the external substrate.

[0044] In addition, the cage rack assembly related to the sixteenth embodiment of the present disclosure includes: the cage rack described in the seventh embodiment and a substrate as the external substrate. The substrate includes a plurality of ventilation openings and a plurality of through holes. The plurality of ventilation openings are openings that penetrate the first surface of the substrate and the second surface corresponding to the back surface of the first surface, and are arranged in a row at intervals from each other in the lateral direction corresponding to the positions of the respective ports. The plurality of through holes are holes into which the press-fit pins of the vertical plate are pressed, and are arranged between the ventilation openings in the lateral direction.

[0045] According to the cage rack assembly related to this embodiment, it includes a cage rack and a substrate as the external substrate. The substrate includes a plurality of ventilation openings and a plurality of through holes. The plurality of ventilation openings are openings that penetrate the first surface of the substrate and the second surface corresponding to the back surface of the first surface, and are arranged in a row at intervals from each other in the lateral direction corresponding to the positions of the respective ports. The plurality of through holes are holes into which the press-fit pins of the vertical plate are pressed, and are arranged between the ventilation openings in the lateral direction. Therefore, when there are ventilation openings for discharging cooling air from the ports formed on the substrate, an area for arranging inner layer wiring can be ensured between the ventilation openings arranged in the longitudinal direction. Description of the Drawings

[0046] Figure 1 is a perspective view of a cage rack assembly related to an embodiment of the present disclosure.

[0047] Figure 2 is an exploded perspective view of a cage rack assembly related to an embodiment of the present disclosure.

[0048] Figure 3 is a front perspective view of a cage rack related to an embodiment of the present disclosure.

[0049] Figure 4 is a rear perspective view of a cage rack related to an embodiment of the present disclosure.

[0050] Figure 5 is a front view of a cage rack related to an embodiment of the present disclosure.

[0051] Figure 6 is a front view of a cage rack related to an embodiment of the present disclosure (omitting EMI fingers and the housing).

[0052] Figure 7 Is an exploded perspective view of a cage related to an embodiment of the present disclosure.

[0053] Figure 8 Is a partial exploded perspective view of a cage related to an embodiment of the present disclosure.

[0054] Figure 9 Is a partial exploded perspective view of a cage related to an embodiment of the present disclosure.

[0055] Figure 10 Is a partial front view perspective view of a cage related to an embodiment of the present disclosure (front surface housing omitted).

[0056] Figure 11 Is a partial front view perspective view of a cage related to an embodiment of the present disclosure.

[0057] Figure 12 Is a front view of a cage related to another example of an embodiment of the present disclosure (external devices omitted).

[0058] Figure 13 Is a front view of a cage related to another example of an embodiment of the present disclosure.

[0059] Figure 14 Is a perspective view of a cage assembly related to another example of an embodiment of the present disclosure.

[0060] Figure 15 Is an exploded perspective view of a cage assembly related to another example of an embodiment of the present disclosure.

[0061] Figure 16 Is a front view of a cage related to another example of an embodiment of the present disclosure.

[0062] Figure 17 Is a rear view perspective view of a cage related to another example of an embodiment of the present disclosure.

[0063] Figure 18 Is a rear view perspective view of a partially enlarged cage related to another example of an embodiment of the present disclosure (Example 1).

[0064] Figure 19 Is a partially enlarged front view of a substrate (Example 1).

[0065] Figure 20 Is a partially enlarged front view of a substrate as a comparative example.

[0066] Figure 21 Is a rear view perspective view of a partially enlarged cage related to another example of an embodiment of the present disclosure (Example 2).

[0067] Figure 22 It is a partial enlarged front view of the substrate (Example 2).

[0068] Description of Reference Numerals

[0069] 10 Cage assembly 100 Cage

[0070] 110 (110S, 110C) Longitudinal unit 111 (111S, 111C) Longitudinal plate

[0071] 111Sb Flange portion 111Ca Communication hole

[0072] 111Cc Press - fit pin (fixing portion) 111Cd Protrusion

[0073] 112 (112H, 112M) Transverse plate 112Ha Communication hole

[0074] 112Hb Through - opening 112Ma Communication hole

[0075] 121 Top plate 121c Press - fit pin (fixing portion)

[0076] 131 Bottom plate 131a Communication hole

[0077] 131c Press - fit pin (fixing portion) 141 EMI finger

[0078] 151 Front surface plate 151a Communication hole

[0079] 151d Gap 152 Second front surface plate

[0080] 160 Gap 161 Gap front - surface opening

[0081] 200 Substrate (external substrate) 201 Front side (first side)

[0082] 202 Back side (second side) 210 Ventilation opening

[0083] 220 Through - hole 300 Connector

[0084] 410 Optical module (external device) 420 Heat sink (external device)

[0085] Ps Port group P (P1, P2) Port

[0086] Us Unit group Detailed Implementation Manner

[0087] Hereinafter, with reference to the drawings, a cage and a cage assembly according to an embodiment of the present disclosure will be described.

[0088] In addition, the "depth direction D1", "longitudinal direction D2", and "lateral direction D3" used in the following description are for assisting in understanding the description and do not limit the actual posture.

[0089] In addition, when the direction of inserting / removing the optical module is set as the "depth direction D1 (front-back direction)", the "longitudinal direction D2 (height direction)" is orthogonal to the depth direction D1, and the "lateral direction D3 (width direction)" is orthogonal to both the depth direction D1 and the longitudinal direction D2.

[0090] In addition, the "depth direction D1" refers to the two directions of from the front near side (front) toward the depth side (rear) and from the depth side toward the front near side, the "longitudinal direction D2" refers to the two directions of from above toward below and from below toward above, and the "lateral direction D3" refers to the two directions of from the right side toward the left side and from the left side toward the right side.

[0091] In addition, the "height" or "height dimension" refers to the distance or dimension along the longitudinal direction D2, and the "width" or "width dimension" refers to the distance or dimension along the lateral direction D3.

[0092] In addition, in a substrate including a first surface and a second surface, when the surface facing the cage is set as the front surface (first surface) and the surface located on the opposite side of the front surface is set as the back surface (second surface), the position of the front surface opposite to the back surface is "front", "in front", and the position of the back surface opposite to the front surface is "rear", "behind".

[0093] (Outline of the cage assembly)

[0094] As Figure 1 and Figure 2 shown, the cage assembly 10 includes: a cage 100; and a substrate 200 (external substrate) on which a plurality of connectors 300 are mounted.

[0095] The substrate 200 includes a front surface 201 (first surface) and a back surface 202 (second surface) corresponding to the surface on the opposite side of the front surface 201, and the cage 100 and the plurality of connectors 300 are mounted on the front surface 201.

[0096] An ASIC (not shown) is mounted on the back surface 202 of the substrate 200.

[0097] The optical module 410 is electrically connected to the connector 300. Specifically, the module substrate included in the optical module 410 is inserted into the gap of the connector 300 along the depth direction D1 and contacts the plurality of terminals (contact pins) of the connector 300. Thus, the optical module 410 is electrically connected to the ASIC via the connector 300 and the substrate 200.

[0098] Cooling air is supplied to the cage assembly 10.

[0099] The cooling air is blown, for example, by a blower device (not shown) toward the front face of the cage 100.

[0100] This cooling air flows into a plurality of ports P and a plurality of gaps 160 described later.

[0101] (Regarding the basic structure of the cage)

[0102] As Figures 3 to 6 shown, the cage 100 is a structure that houses a plurality of optical modules 410 and a plurality of heat sinks 420, or houses a plurality of optical modules 410.

[0103] The cage 100 has a plurality of ports P.

[0104] A number of the plurality of ports P are arranged in a row along the longitudinal direction D2 to form port groups Ps. Moreover, the plurality of port groups Ps are arranged in the lateral direction D3 with an interval (gap 160) therebetween. In the case of the present embodiment, 16 ports P are arranged in a row along the longitudinal direction D2 to form one port group Ps. Moreover, 4 port groups Ps are arranged in the lateral direction D3 with an interval (gap 160) therebetween.

[0105] The plurality of ports P include a plurality of first ports P1 and a plurality of second ports P2.

[0106] The first port P1 is a space for housing the optical module 410, and the second port P2 is a space for housing the heat sink. Accordingly, the first port P1 matches the shape and size of the optical module 410, and the second port P2 matches the shape and size of the heat sink 420.

[0107] The optical module 410 can be either an RHS type (RHS: Riding Heat Sink) or an IHS type (IHS: Integrated Heat Sink).

[0108] In one port group Ps, the plurality of first ports P1 and the plurality of second ports P2 are alternately arranged in a row along the longitudinal direction D2 in the order of the second port P2, the first port P1, the second port P2, the first port P1, ···, the first port P1. In other words, in one port group Ps, the plurality of first ports P1 and the plurality of second ports P2 are alternately arranged in a row along the longitudinal direction D2 with the second port P2 located above the first port P1. In Figure 6 the case of, in one port group Ps, there are 8 pairs of the second port P2 (located above) and the first port P1 (located below) arranged in a row along the longitudinal direction D2.

[0109] In addition, the number of the plurality of first ports P1 arranged along the longitudinal direction D2 and the number of the plurality of second ports P2 can be appropriately changed according to the required number of ports P.

[0110] The gap 160 located between the plurality of port groups Ps and the port groups Ps is defined by a plurality of longitudinal units 110 (110S, 110C) arranged at intervals (gap 160) in the lateral direction D3, a common one top plate 121 mounted on the upper edges of all the longitudinal units 110, and a common one bottom plate 131 mounted on the lower edges of all the longitudinal units 110.

[0111] As Figure 7 shown, the plurality of longitudinal units 110 arranged along the lateral direction D3 include: two longitudinal units 110S located on both sides in the lateral direction D3; and at least one longitudinal unit 110C located between the longitudinal units 110S in the lateral direction D3 (two in the case of this embodiment).

[0112] The number of the longitudinal units 110C arranged along the lateral direction D3 can be appropriately changed according to the required number of port groups Ps (the number of ports P).

[0113] In addition, when the number of the port groups Ps arranged along the lateral direction D3 is two, the longitudinal unit 110C is not required.

[0114] As Figure 7 and Figure 8 shown, each longitudinal unit 110S includes: two longitudinal plates 111 (111S, 111C) arranged at a first interval in the lateral direction D3; and a plurality of transverse plates 112 (112H, 112M) arranged at a second interval and / or a third interval along the longitudinal direction D2. Each longitudinal unit 110S is formed by combining these plates.

[0115] The longitudinal plate 111 is a plate that extends along the longitudinal direction D2 and the depth direction D1 and has a thickness in the lateral direction D3.

[0116] The longitudinal plate 111 has a height dimension that extends over the entire height of the port group Ps.

[0117] In the longitudinal unit 110S, the two longitudinal plates 111 include one longitudinal plate 111S and one longitudinal plate 111C.

[0118] The longitudinal plate 111S is also a side plate that constitutes the side surface of the cage 100 and is located on the outermost side in the lateral direction D3 of the cage 100. Therefore, only two longitudinal plates 111S are installed in the cage 100.

[0119] A flange portion 111Sb (refer to Figure 1 ) for use when fixing the cage 100 to the substrate 200 may be provided at the trailing edge of the longitudinal plate 111S.

[0120] The longitudinal plate 111C is the longitudinal plate 111 other than the longitudinal plate 111S.

[0121] The longitudinal plates 111S and 111C are arranged facing each other with a first interval therebetween in the lateral direction D3. The "first interval" mentioned here is an interval / distance corresponding to the width of one port P (the first port P1 and the second port P2).

[0122] The transverse plate 112 is a plate that extends along the lateral direction D3 and the depth direction D1 and has a thickness in the longitudinal direction D2.

[0123] The transverse plate 112 has a width dimension that extends over the width of one port P.

[0124] The transverse plate 112 is disposed between the longitudinal plates 111S and 111C, and the edges in the lateral direction D3 (the two edges along the depth direction D1) are fixed to the longitudinal plates 111S and 111C. The fixing of the transverse plate 112 and the longitudinal plate 111S is performed, for example, by inserting a plurality of protrusions provided at the edge of the transverse plate 112 into the gaps formed in the longitudinal plate 111 and then bending each protrusion. However, other fixing methods may also be adopted.

[0125] The plurality of transverse plates 112 includes a plurality of transverse plates 112H and a plurality of transverse plates 112M.

[0126] In one longitudinal unit 110S, the plurality of transverse plates 112H and the plurality of transverse plates 112M are alternately arranged in a row along the longitudinal direction D2 in the order of transverse plate 112H, transverse plate 112M, transverse plate 112H, transverse plate 112M, ···, transverse plate 112H. In Figure 8 the case of, in one longitudinal unit 110S, eight transverse plates 112H and seven transverse plates 112M are alternately arranged in a row along the longitudinal direction D2.

[0127] As Figure 6 shown, the transverse plate 112H is a plate on which the heat sink 420 is placed. As Figure 8 shown, a through opening 112Hb is formed in the transverse plate 112H. The through opening 112Hb is an opening that connects the second port P2 and the first port P1 separated by the transverse plate 112H. Thereby, the heat sink 420 (specifically, the protrusion provided on the bottom surface of the heat sink 420) accommodated in the second port P2 enters the first port P1 via the through opening 112Hb and contacts the optical module 410 accommodated in the first port P1.

[0128] As Figure 6 shown, the transverse plate 112M is a plate on which the optical module 410 is placed. In addition, at the lowermost layer of the longitudinal unit 110S, the bottom plate 131 functions as the eighth transverse plate 112M.

[0129] The horizontal plates 112H and 112M are arranged facing each other in the longitudinal direction D2 with a second interval and / or a third interval therebetween. Specifically, in the relationship where the horizontal plate 112H is above and the horizontal plate 112M is below, the horizontal plates 112H and 112M are arranged facing each other in the longitudinal direction D2 with a second interval therebetween; in the relationship where the horizontal plate 112H is below and the horizontal plate 112M is above, the horizontal plates 112H and 112M are arranged facing each other in the longitudinal direction D2 with a third interval therebetween. The "second interval" mentioned here is the interval / distance corresponding to the height of one first port P1, and the "third interval" is the interval / distance corresponding to the height of one second port P2.

[0130] As Figure 7 and Figure 9 shown, each longitudinal unit 110C includes: two longitudinal plates 111 (111C) arranged with a first interval therebetween in the transverse direction D3; and a plurality of horizontal plates 112 (112H, 112M) arranged with a second interval and / or a third interval therebetween in the longitudinal direction D2. Each longitudinal unit 110C is formed by combining these plates.

[0131] The longitudinal plates 111C are arranged facing each other in the transverse direction D3 with a first interval therebetween.

[0132] The structure of the longitudinal unit 110C other than the above is the same as that of the longitudinal unit 110S. Therefore, the detailed description of the longitudinal unit 110C is omitted here.

[0133] As Figure 5 and Figure 6 shown, the longitudinal units 110S and 110C configured as described above are arranged in a state where at least one longitudinal unit 110C (two in this embodiment) is arranged between two longitudinal units 110S located on both sides in the transverse direction D3 and with a space (gap 160) therebetween in the transverse direction D3.

[0134] In a plurality of vertical units 110 (hereinafter also referred to as "unit group Us") arranged at intervals (gap 160) in the horizontal direction D3, a common top plate 121 is fixed to the upper edges of two vertical plates 111 included in each vertical unit 110, and a common bottom plate 131 is fixed to the lower edges of two vertical plates 111 included in each vertical unit 110. The fixing of the vertical plate 111 and the top plate 121 is performed, for example, by inserting a plurality of protrusions provided on the upper edge of the vertical plate 111 into the gaps formed in the top plate 121 and then bending each protrusion. In addition, the fixing of the vertical plate 111 and the bottom plate 131 is performed, for example, by inserting a plurality of protrusions provided on the lower edge of the vertical plate 111 into the gaps formed in the bottom plate 131 and then bending each protrusion. However, other fixing methods may also be adopted.

[0135] As Figure 7 shown, the top plate 121 and the bottom plate 131 are plates that extend along the horizontal direction D3 and the depth direction D1 and have a thickness in the vertical direction D2.

[0136] The top plate 121 and the bottom plate 131 have a width dimension that extends over the entire width of the unit group Us (from one vertical plate 111S to the other vertical plate 111S).

[0137] Thus, as Figure 5 and Figure 6 shown, the unit group Us is integrated, and a plurality of port groups Ps including a plurality of first ports P1 and a plurality of second ports P2, and the gap 160 between the port groups Ps are defined.

[0138] Specifically, each of the lowermost first ports P1 arranged along the horizontal direction D3 (four first ports P1 in this embodiment) is defined by the upper horizontal plate 112H, the left and right two vertical plates 111, and the lower bottom plate 131. In addition, the other first ports P1 are defined by the upper horizontal plate 112H, the left and right two vertical plates 111, and the lower horizontal plate 112M.

[0139] Moreover, each of the uppermost second ports P2 arranged along the horizontal direction D3 (four second ports P2 in this embodiment) is defined by the upper top plate 121, the left and right two vertical plates 111, and the lower horizontal plate 112H. In addition, the other second ports P2 are defined by the upper horizontal plate 112M, the left and right two vertical plates 111, and the lower horizontal plate 112H.

[0140] Moreover, the gap 160 is delimited by two vertical plates 111C on the left and right, the top plate 121 above, and the bottom plate 131 below. In addition, the two vertical plates 111C that delimit the gap 160 (the two vertical plates 111C facing each other across the gap 160) belong to different vertical units 110. Specifically, the first vertical plate 111C is included in one vertical unit 110 (the first vertical unit 110), and the second vertical plate 111C is included in another vertical unit 110 (the second vertical unit 110) adjacent to the first vertical unit 110.

[0141] As described above, the first port P1 is a space for accommodating the optical module 410, and the second port P2 is a space for accommodating the heat sink 420. On the other hand, the gap 160 is a simple space that does not accommodate external devices such as the optical module 410 or the heat sink 420.

[0142] Each port P and each gap 160 penetrate along the depth direction D1. That is, the wall bodies (the wall bodies composed of 4 plates on the top, bottom, left, and right) that delimit each port P and each gap 160 are in the shape of a bottomless square tube.

[0143] In each port P and each gap 160 that penetrate along the depth direction D1, the opening facing the substrate 200 is called the "rear surface opening" (see Figure 4 ), and the opening located on the opposite side of the rear surface opening is called the "front surface opening" (see Figure 6 ).

[0144] As Figure 10 shown, EMI fingers 141 are respectively installed on the four sides of the front surface opening that constitutes the first port P1.

[0145] Each EMI finger 141 is installed in such a way as to sandwich the wall bodies (each plate) that delimit the first port P1.

[0146] Thereby, the shielding performance against the noise leaking from the gap between the first port P1 and the optical module 410 can be improved.

[0147] According to the cage 100 described as above, the following effects are achieved.

[0148] By causing the vertical plate 111 to function as the wall body of the longitudinal direction D2 of the port group Ps (i.e., the wall body of the longitudinal direction D2 shared by all the ports P arranged in a row along the longitudinal direction D2), and causing the horizontal plate 112 to function as the wall body of the lateral direction D3 of each port P included in the port group Ps, the width dimension of the horizontal plate 112 can be made substantially the same as the width dimension of one port P. Therefore, the width dimension of the horizontal plate 112 can be suppressed to the minimum limit. Thereby, it is difficult for the horizontal plate 112 to bend in the longitudinal direction D2. In particular, in the cage 100 of the present embodiment where an external device is inserted vertically with respect to the substrate 200, it is very important to reduce the amount of bending of the horizontal plate 112 on which the external device is placed.

[0149] In addition, the port group Ps composed of a plurality of ports P arranged in a row along the longitudinal direction D2 can be unitized into the longitudinal unit 110. Thereby, by simply changing the number of longitudinal units 110 arranged along the lateral direction, the number of ports P / port groups Ps can be easily increased or decreased.

[0150] In addition, a gap 160 serving as a space that does not accommodate an external device is defined between the longitudinal units 110. The gap 160 includes a rear surface opening and a front surface opening. Therefore, for example, the gap 160 can be used as a flow path to allow the cooling air to flow from the front surface opening to the rear surface opening. Therefore, the external device accommodated in the port P can be cooled by the air flowing through the gap 160 adjacent to the port P. In addition, a space can be forcibly partitioned between the external devices along the lateral direction D3, so that a structure in which heat is difficult to stay can be formed.

[0151] In addition, the top plate 121 is fixed to the upper edges of the respective vertical plates 111 of the plurality of longitudinal units 110 included in the unit group Us over the entire width of the lateral direction D3 of the unit group Us, and the bottom plate 131 is fixed to the lower edges of the respective vertical plates 111 of the plurality of longitudinal units 110 included in the unit group Us over the entire width of the lateral direction D3 of the unit group Us. Therefore, the structure of the longitudinal unit 110 can be maintained unchanged, and by simply preparing the top plate 121 and the bottom plate 131 having different dimensions (specifically, the dimension of the lateral direction D3) in advance, the cage 100 obtained by arranging any number of longitudinal units 110 along the lateral direction D3 can be constructed. Thereby, the deformation and expansion of the cage 100 with different numbers of ports P can be easily performed.

[0152] (Regarding the communication holes)

[0153] Communication holes for allowing the cooling air to flow smoothly are formed in each plate.

[0154] Specifically, as Figure 8 and Figure 9As shown, a plurality of communication holes 111Ca are formed in the vertical plate 111C, a plurality of communication holes 112Ha are formed in the horizontal plate 112H, and a plurality of communication holes 112Ma are formed in the horizontal plate 112M. In addition, as Figure 7 shown, a plurality of communication holes 131a are formed in the bottom plate 131.

[0155] As Figure 8 and Figure 9 shown, the plurality of communication holes 111Ca are formed in a range corresponding to the position of the first port P1 on the vertical plate 111C.

[0156] Thus, the cooling of the optical module 410 accommodated in the first port P1 can be promoted.

[0157] The plurality of communication holes 112Ha are formed in a range of the horizontal plate 112H located behind the through opening 112Hb.

[0158] Thus, the cooling of the optical module 410 and the heat sink 420 can be promoted.

[0159] The plurality of communication holes 112Ma are formed in substantially the entire range of the horizontal plate 112M.

[0160] Thus, the cooling of the optical module 410 and the heat sink 420 can be promoted.

[0161] As Figure 7 shown, the plurality of communication holes 131a are formed in a range corresponding to the position of the first port P1 on the bottom plate 131.

[0162] Thus, the cooling of the optical module 410 accommodated in the first port P1 can be promoted.

[0163] (Regarding the front panel)

[0164] In the following description, the front surface opening of the gap 160 is specifically defined as the "gap front surface opening 161".

[0165] As Figure 5 and Figure 11 shown, a front panel 151 that closes the gap front surface opening 161 is installed on the cage 100.

[0166] The front panel 151 is a plate that is long in the longitudinal direction D2 and corresponds to the shape of the gap front surface opening 161.

[0167] The size and shape of the front panel 151 are designed so as not to interfere with the external device when the external device is inserted into each port P.

[0168] As Figure 10 and Figure 11As shown, a plurality of protrusions 111Cd are provided on each vertical plate 111C.

[0169] The protrusion 111Cd is a U-shaped portion that protrudes forward from the leading edge of the vertical plate 111C and along the depth direction D1, and is provided within the range of the vertical plate 111C where the EMI fingers 141 are not installed, that is, within the range of the vertical plate 111C corresponding to the side of the second port P2.

[0170] As Figure 11 shown, a plurality of slits 151d are formed in the front panel 151, and are configured such that the protrusions 111Cd of the two vertical plates 111C facing each other across the gap 160 can be inserted.

[0171] By inserting the protrusions 111Cd of the two vertical plates 111C into the slits 151d of one front panel 151, the front panel 151 is fixed to the leading edge of the vertical plate 111C. At the same time, two adjacent vertical units 110 including the two vertical plates 111C fixed by one front panel 151 are rigidly joined. In addition, the two vertical plates 111C fixed by one front panel 151 are difficult to bend in the lateral direction D3.

[0172] In addition, the protrusion 111Cd can also be bent after being inserted into the slit 151d.

[0173] A plurality of communication holes 151a are formed in the front panel 151.

[0174] Each communication hole 151a is a through hole, and communicates the outside and the gap 160 when the front panel 151 is installed on the cage 100.

[0175] The plurality of communication holes 151a are arranged in a row along the longitudinal direction D2, for example.

[0176] Thereby, even when the front panel 151 is installed, the cooling air can easily flow into the gap 160 through the communication holes 151a.

[0177] The front panel 151 is made of metal, for example.

[0178] When the front panel 151 is installed on the cage 100, the front panel 151 contacts the EMI fingers 141 within the range where the EMI fingers 141 are installed, that is, within the range corresponding to the side of the first port P1.

[0179] Thereby, the shielding performance against the noise leaking from the gap between the first port P1 and the optical module 410 can be further improved.

[0180] In addition, a second front panel 152 that closes the front surface opening of each second port P2 can also be installed on the cage 100.

[0181] (Variation 1 regarding the port / port group)

[0182] With Figure 5 And Figure 6 In contrast, as Figure 12 And Figure 13 shown, the sizes of the first port P1 and the second port P2 can be appropriately changed according to the size of an external device (optical module 410 or heat sink 420).

[0183] (Variation 2 regarding the port / port group)

[0184] As Figures 14 to 17 shown, the port group Ps can also be configured as follows.

[0185] That is, in one port group Ps, a plurality of first ports P1 and a plurality of second ports P2 are alternately arranged in a column along the longitudinal direction D2 in the order of the first port P1, the second port P2, the first port P1, the second port P2, ···, the first port P1. In other words, in one port group Ps, a plurality of first ports P1 and a plurality of second ports P2 are alternately arranged in a column along the longitudinal direction D2 with the second port P2 located between one first port P1 and another first port P1 adjacent in the longitudinal direction D2.

[0186] In the case of this port group Ps, an IHS type optical module 410 with a pre-assembled heat sink is accommodated in each first port P1.

[0187] On the other hand, the heat sink 420 is not accommodated in each second port P2. That is, the second port P2 is a simple space. However, this space promotes the heat dissipation of the optical module 410. That is, this space functions in the efficient cooling of the optical module 410.

[0188] In the case where the heat sink 420 is not accommodated in the second port P2, the heat sink 420 is not placed on the cross plate 112H, so there is no need to provide a through opening 112Hb in the cross plate 112H. However, in order to improve the heat dissipation performance, a plurality of communication holes 112Ha can also be formed in substantially the entire range of the cross plate 112H.

[0189] (Relationship between the fixing of the cage and the ventilation opening of the substrate)

[0190] As Figure 2 And Figure 15 shown, a plurality of ventilation openings 210 are formed in the substrate 200.

[0191] Each ventilation opening 210 is an opening that penetrates the front surface 201 and the back surface 202 of the substrate 200.

[0192] The position of each ventilation opening 210 corresponds to the position of each second port P2 that houses the radiator 420 (refer to Figure 2 ) and / or the position of each first port P1 that houses the IHS type optical module 410 (refer to Figure 15 ). That is, each ventilation opening 210 corresponds one-to-one with each second port P2 and / or each first port P1, and they are arranged in a row at intervals from each other in the lateral direction D3.

[0193] Thus, the cooling air passing through the radiator 420 and / or the radiator assembled in the IHS type optical module 410 passes through the area in contact with the back surface 202 of the substrate 200.

[0194] The cage 100 is mounted on the substrate 200 configured as described above. In addition to or instead of using the flange portion 111Sb of the vertical plate 111S that has been described for fixing, the cage 100 can also be fixed to the substrate 200 using the fixing portion provided at the trailing edge of the vertical plate 111.

[0195] Thus, the cage 100 and the substrate 200 are firmly fixed, so that the substrate 200 is difficult to bend in the depth direction D1 when inserting and removing external devices. In addition, since the vertical plates 111C are fixed by the substrate 200, each vertical plate 111C is difficult to bend in the lateral direction D3. In addition, since each longitudinal unit 110 can be positioned relative to the substrate 200, the assembly property of the cage 100 can be improved.

[0196] In addition to or instead of using the flange portion 111Sb for fixing and / or using the fixing portion provided on the vertical plate 111 for fixing, the cage 100 can also be fixed to the substrate 200 using the fixing portion provided at the trailing edge of the top plate 121 and / or the trailing edge of the bottom plate 131.

[0197] Thus, the cage 100 and the substrate 200 are firmly fixed, so that the substrate 200 is difficult to bend in the depth direction D1 when inserting and removing external devices. In addition, since the top plate 121 and / or the bottom plate 131 are fixed by the substrate 200, the top plate 121 and / or the bottom plate 131 are difficult to bend in the longitudinal direction D2.

[0198] ((Example 1))

[0199] As the fixing portion, for example, as shown in Figure 17 and Figure 18 , a plurality of press fit pins 111Cc provided on each vertical plate 111C, a plurality of press fit pins 121c provided on the top plate 121, and a plurality of press fit pins 131c provided on the bottom plate 131 are shown.

[0200] The press - fit pin 111Cc is a part that protrudes rearward from the trailing edge of the longitudinal plate 111C and along the depth direction D1, and is provided within the range corresponding to the position of a through - hole 220 formed in the substrate 200 described later. In the first embodiment, the press - fit pins 111Cc are provided on both of the two longitudinal plates 111C facing each other with a gap 160 therebetween.

[0201] The press - fit pin 121c is a part that protrudes rearward from the trailing edge of the top plate 121 and along the depth direction D1, and is provided within the range corresponding to the position of a through - hole 220 formed in the substrate 200 described later.

[0202] The press - fit pin 131c is a part that protrudes rearward from the trailing edge of the bottom plate 131 and along the depth direction D1, and is provided within the range corresponding to the position of a through - hole 220 formed in the substrate 200 described later.

[0203] The cage 100 provided with the fixing part (press - fit pin) as described above is installed on Figure 19 the substrate 200 shown.

[0204] In Figure 19 the substrate 200 shown, a plurality of through - holes 220 for inserting respective press - fit pins are formed.

[0205] Each through - hole 220 is arranged between one ventilation opening 210 and another ventilation opening 210 adjacent in the lateral direction D3. Thus, a region for arranging the inner - layer wiring can be ensured between one ventilation opening 210 and another ventilation opening 210 adjacent in the longitudinal direction D2. If the inner - layer wiring is arranged in a way to avoid the through - hole 220 when the through - hole 220 is arranged between the ventilation openings 210 adjacent in the longitudinal direction D2, the region for arranging the inner - layer wiring is restricted compared to the present embodiment where no through - hole 220 is arranged between the ventilation openings 210 adjacent in the longitudinal direction D2.

[0206] In addition, as shown in the comparative example Figure 20 , if no through - hole 220 is arranged between one ventilation opening 210 and another ventilation opening 210 adjacent in the lateral direction D3 and a plurality of ventilation openings 210 arranged along the lateral direction D3 are integrated ( Figure 20 denoted by reference numeral 210' in the figure), compared with the present embodiment where each ventilation opening 210 corresponds one - to - one with each second port P2 and / or each first port P1 (refer to Figure 19 ), the substrate 200 is likely to bend in the depth direction D1. This is because the portion of the substrate 200 between the ventilation openings 210' adjacent in the longitudinal direction D2 ( Figure 20The parts in section B) are not connected to each other in the longitudinal direction D2. However, when through holes 220 are arranged between the vent openings 210' adjacent in the longitudinal direction D2 in order to reduce the amount of bending of the substrate 200, the area for arranging the inner layer wiring is restricted as described above.

[0207] Here, as Figure 18 shown, press-fit pins 111Cc are provided on both of the two longitudinal plates 111C facing each other with a gap 160 therebetween. Therefore, as Figure 19 shown, the through holes 220 arranged between the vent openings 210 are arranged in at least two in the lateral direction D3 ( Figure 19 section A).

[0208] In addition, one through hole 220 located above Figure 19 section A is a through hole 220 for the press-fit pin 121c to be provided on the top plate 121.

[0209] ((Embodiment 2))

[0210] As the fixing parts, for example, a plurality of press-fit pins 111Cc provided on each longitudinal plate 111C and a plurality of press-fit pins 121c provided on the top plate 121 are shown as Figure 21 shown. In addition, although not shown in Figure 21 , a plurality of press-fit pins 131c are also provided on the bottom plate 131.

[0211] In Embodiment 2, the press-fit pin 111Cc is provided on one of the two longitudinal plates 111C facing each other with a gap 160 therebetween.

[0212] The cage 100 provided with the fixing parts (press-fit pins) as described above is mounted on Figure 22 the substrate 200 shown as

[0213] In Figure 22 the substrate 200 shown as

[0214] a plurality of through holes 220 for inserting each press-fit pin are formed.

[0215] Here, as Figure 21 shown, the press-fit pin 111Cc is provided on one of the two longitudinal plates 111C facing each other with a gap 160 therebetween. Therefore, as Figure 22 shown, the through holes 220 arranged between the vent openings 210 are arranged in only one in the lateral direction D3 ( Figure 22 section C).

[0216] Therefore, compared with Embodiment 1, the size of the lateral direction D3 of the ventilation opening 210 (the ventilation opening 210 of Embodiment 1 is indicated by a double-dot chain line) can be increased. Thereby, the cooling air can more easily pass through the region in contact with the back surface 202 of the substrate 200.

[0217] In addition, in Embodiment 1 and Embodiment 2, the number or arrangement of the through holes 220 can be appropriately changed according to the specifications. Further, it is obvious that the number or arrangement of the respective press-fit pins can be appropriately changed according to the number or arrangement of the through holes 220.

Claims

1. A cage, the cage being mounted on a first surface of an external substrate and allowing a plurality of external devices to be inserted along a depth direction substantially orthogonal to the first surface to accommodate the plurality of external devices, characterized in that: A direction perpendicular to the depth direction is defined as a longitudinal direction, and a direction perpendicular to the depth direction and the longitudinal direction is defined as a lateral direction. The cage comprises at least one longitudinal unit, The vertical unit defines a plurality of ports as spaces for accommodating the external devices, and the ports are arranged in a row along the vertical direction to form a port group. The vertical unit comprises: two longitudinal plates extending along the longitudinal direction, covering the entire height of the port group in the longitudinal direction, and arranged to face each other in the transverse direction and separated by a distance corresponding to the transverse width of the port; and a plurality of transverse plates extending in the transverse direction, arranged between the longitudinal plates, and arranged facing each other in the longitudinal direction, In the vertical unit, the plurality of ports included in the port group are defined by the two vertical plates and the plurality of horizontal plates.

2. The cage according to claim 1, characterized in that: The number of the vertical units is multiple, A plurality of the longitudinal units are arranged in a row along the transverse direction, Among the plurality of the vertical units arranged in a row along the horizontal direction, a gap as a space not accommodating the external device is defined between a first vertical unit and a second vertical unit adjacent to the first vertical unit in the horizontal direction, The gaps include: A rear surface opening facing the external substrate; and The front surface is opened and is located on the opposite side of the rear surface opening.

3. The cage according to claim 2, characterized in that: including at least one front panel, The front surface plate covers the front surface opening of the gap, and the front surface plate is fixed to a front edge of one of the vertical plates of the first vertical unit and a front edge of one of the vertical plates of the second vertical unit that face each other across the gap.

4. The cage according to claim 2, characterized in that: The front surface plate has a plurality of communication holes, The communication hole connects the outside with the gap.

5. The cage according to claim 3, characterized in that: With multiple EMI fingers, The EMI finger is mounted on the front edge in a state of sandwiching the two surfaces of the longitudinal plate. The front surface plate is made of metal and contacts the EMI fingers.

6. The cage according to claim 1, characterized in that: The plurality of longitudinal plates have a fixing portion, The fixing portion protrudes from a rear edge of the vertical plate facing the external substrate in the depth direction and can be fixed to the external substrate.

7. The cage according to claim 6, characterized in that: The fixing portion is a press-fit pin that is pressed into the external substrate.

8. The cage according to claim 1, characterized in that: The plurality of transverse plates have a plurality of communicating holes, The communication hole connects the upper surface and the lower surface of the transverse plate.

9. The cage according to claim 1, characterized in that: The external device is an optical module or an optical module and a heat sink for cooling the optical module.

10. The cage according to claim 9, characterized in that: Among the plurality of ports arranged in a row along the longitudinal direction, The first port is the port for accommodating the optical module, The second port adjacent to the first port in the longitudinal direction and located above the first port is the port for accommodating the heat sink, The transverse plate separating the first port and the second port has a through opening, The through opening connects the first port and the second port.

11. The cage according to claim 1, characterized in that: Including top plate and bottom plate, A collection of a plurality of the vertical units arranged in a row along the horizontal direction is defined as a unit group, The top plate extends over the entire width of the unit group in the lateral direction. The top plate is fixed to the upper edge of each of the vertical plates of the plurality of vertical units included in the unit group. The bottom plate extends over the entire width of the unit group in the lateral direction. The bottom plate is fixed to the lower edge of each of the vertical plates of the plurality of vertical units included in the unit group.

12. The cage according to claim 11, characterized in that: The top plate and / or the bottom plate has a fixing portion, The fixing portion protrudes from a rear edge of the top plate and / or the bottom plate facing the external substrate along the depth direction, and can be fixed to the external substrate.

13. The cage according to claim 12, characterized in that: The fixing portion is a press-fit pin that is pressed into the external substrate.

14. The cage according to claim 11, characterized in that: The bottom plate has a plurality of communicating holes. The communication hole connects the upper surface and the lower surface of the bottom plate.

15. A cage assembly, characterized in that: include: The cage according to claim 1; as well as A substrate serving as the external substrate.

16. A cage assembly, characterized in that: include: The cage according to claim 7; as well as As a substrate of the external substrate, The substrate includes a plurality of ventilation openings and a plurality of through holes, The plurality of ventilation openings are openings penetrating the first surface of the substrate and a second surface corresponding to the back surface of the first surface, and are arranged in a row in a manner corresponding to the positions of the ports and spaced apart from each other in the lateral direction. The plurality of through holes are holes into which the press-fit pins of the vertical plate are press-fitted, and are arranged between the ventilation openings in the lateral direction.

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