WO2014141493A1 - Receptacle assembly and transceiver module assembly - Google Patents

Abstract

In a state in which a heat sink (26) has been detached from a receptacle cage (12), if an optical module (14) is inserted into a compartment (12) of the receptacle cage (12), even if said optical module (14) is inserted in an orientation in which a protective wall (143) of the optical module (14) is raised, by the distal part of the protective wall (143) of the optical module (14) abutting against the ends of guide tabs (12R2, 12RT2) of a guide plate (12RP), the distal part of the protective wall (143) is pressed down and guided into the gap between the guide tabs (12RT1, 12RT2).

Description

Receptacle assembly and transceiver module assembly

The present invention relates to a receptacle assembly including a heat sink, and a transceiver module assembly.

In an optical communication system, a transceiver module is practically used to transmit an optical signal transmitted by an optical connector or the like to a motherboard. For example, as disclosed in Patent Document 1, the transceiver module is arranged in a chassis constituting the communication system. Such a transceiver module includes an optical module (referred to as a module assembly in Patent Document 1), and an optical module receptacle (patent) which is placed on a circuit board as a motherboard and detachably accommodates the optical module. (Referred to as a receptacle assembly in Document 1) as a main component.

A plurality of optical modules may be arranged in parallel in one direction at a predetermined interval on the front cover of the chassis described above. For example, an optical cable connector and an optical cable for interconnection with other systems are connected to the ports at the ends of the optical modules exposed on the front cover of the chassis. When each optical module is connected to the optical module receptacle, the connection end of the optical module is connected to the connected portion of the receptacle connector mounted on the circuit board in the optical module receptacle. The connected portion of the receptacle connector is electrically connected to the circuit board described above. As a result, the optical cable connector and the optical cable are electrically connected to the circuit board via the transceiver module.

Further, at the upper end of the optical module receptacle cage (referred to as a guide frame in Patent Document 1), as shown in FIG. 9, heat generated from the optical module is radiated into the chassis. A heat sink is provided. As shown in FIG. 2, when the optical module is connected to the optical module receptacle, the heat sink has a raised heat transfer surface portion on the lower end surface where the outer peripheral surface of the optical module abuts through the opening of the cage. ing. The periphery of the heat transfer surface portion of the heat sink is received by a frame portion formed at the periphery of the opening formed in the upper end surface of the cage, and is held in the cage by a clip. At that time, both side portions of the clip are respectively engaged with holding tabs formed on both side walls of the cage.

JP 2005-520296 A

The area of the heat transfer surface of the heat sink described above is required to be larger from the viewpoint of heat dissipation efficiency.

However, as shown in Patent Document 1, in a cage formed by sheet metal processing, in a configuration in which a heat sink is received by a frame portion formed at the periphery of an opening formed in the upper end surface of the cage, the frame portion Therefore, there is a limit to increasing the opening area of the opening through which the heat transfer surface portion of the heat sink passes.

Further, when the heat sink is not arranged in the cage, when the optical module is connected to the optical module receptacle, the outer peripheral surface of the optical module inserted into the cage is not guided to the heat transfer surface portion of the heat sink, and the optical module The optical module inserted by the gap between the outer peripheral portion and the cage is not positioned at an appropriate position, and as a result, the connection end portion of the optical module may not be smoothly connected to the connected portion of the receptacle connector.

In view of the above problems, the present invention is a receptacle assembly including a heat sink, and a transceiver module assembly, wherein the heat transfer surface area of the heat sink is maximized with respect to the optical module housing portion of the optical module receptacle. A receptacle assembly and a transceiver module assembly that can be set and can smoothly connect the connection end of the optical module to the connected portion of the receptacle connector even when the heat sink is not disposed in the cage The purpose is to do.

To achieve the above object, a receptacle assembly including a heat sink according to the present invention has at least one module slot through which an optical module including a module substrate having a connection end at one end passes. An optical module is detachably accommodated, and at least one module accommodating portion having a bottom wall portion that contacts the lower surface of the optical module, and a connector that communicates with the module accommodating portion and is connected to the connection end of the module substrate in a detachable manner. An outer periphery of the optical module via a heat transfer surface selectively disposed on the receptacle cage and having an area corresponding to the area of the bottom wall. Heat sink and heat sink to dissipate the heat generated from the optical module. When the heat sink is placed in the receptacle cage, the heat sink support mechanism that slidably supports the heat sink along the mounting / removing direction of the optical module and the heat sink support mechanism that is placed in the receptacle cage and the heat sink is not arranged, the module slot is The tip of the connecting end of the optical module inserted through the connector is brought into contact with the tip of the outer portion protruding toward the connector from the connecting end of the optical module so that the tip is placed in the connector housing. And a guide plate member that guides.

Further, the guide plate member may have a cutout portion at a position above the connector housing portion, and the heat transfer surface of the heat sink may have an extension portion inserted into the cutout portion. The guide plate member may be fixed to the side wall of the receptacle cage. A gap may be formed between the inner peripheral surface of the guide plate member and the outer peripheral surface of the connector cover that covers the connector so that a protective wall of the optical module that protects the connection end portion is inserted. The guide plate member may be provided at a position lower than the position of the heat sink support mechanism in the receptacle cage. The width in the direction orthogonal to the attaching / detaching direction of the optical module in the notch portion of the guide plate member may be smaller than the width orthogonal to the attaching / detaching direction in the protective wall of the optical module.

A transceiver module assembly according to the present invention includes an optical module including a module substrate having a connection end at one end, and the above-described receptacle assembly.

According to the receptacle assembly including the heat sink and the transceiver module assembly according to the present invention, when the heat sink support mechanism is arranged in the receptacle cage and the heat sink is arranged in the receptacle cage, the heat sink is arranged along the mounting direction of the optical module. Therefore, the area of the heat transfer surface portion of the heat sink can be set to the maximum with respect to the optical module housing portion of the optical module receptacle, and the guide plate member is arranged in the receptacle cage. When the heat sink is not arranged, the distal end of the outer portion protruding toward the connector rather than the connecting end of the optical module so as to guide the distal end of the connected end of the optical module inserted through the module slot to the connector Abutted against Since guides the tip into the connector receptacle even if the heat sink is not placed in the cage, the connecting end of the optical module can be smoothly connected to the connecting portion of the receptacle connector.

FIG. 1 is a plan view showing a first embodiment of a receptacle assembly according to the present invention. FIG. 2 is a perspective view showing a first embodiment of a receptacle assembly according to the present invention together with a heat sink. FIG. 3 is a perspective view showing a heat sink used in the example shown in FIG. FIG. 4 is a cross-sectional view showing a main part partially enlarged with the heat sink attached in the example shown in FIG. FIG. 5 is a partially enlarged perspective view of the example shown in FIG. FIG. 3 is a partial perspective view for explaining an operation in the example shown in FIG. 2. FIG. 7A is a partial cross-sectional view for explaining the operation in the example shown in FIG. FIG. 7B is a partial cross-sectional view for explaining the operation in the example shown in FIG. FIG. 8 is a perspective view showing a second embodiment of the receptacle assembly according to the present invention. FIG. 9 is a perspective view showing a heat sink used in the example shown in FIG. FIG. 10A is a partial cross-sectional view for explaining the operation in the example shown in FIG. FIG. 10B is a partial cross-sectional view for explaining the operation in the example shown in FIG.

FIG. 2 shows a first embodiment of a receptacle assembly which constitutes a part of a transceiver module assembly according to the present invention, together with a printed wiring board disposed inside a predetermined housing. FIG. 2 shows a state where an optical module 14 and a heat sink 26 described later are removed.

A case (not shown) that forms a sealed space accommodates a printed wiring board 16 on which a transceiver module assembly is mounted. In FIG. 2, four receptacle cages are mounted on one printed wiring board 16. However, the invention is not limited to such an example, and five or more receptacle cages are formed on one printed wiring board. 16 may be implemented.

The transceiver module assembly includes an optical module 14 and an optical module receptacle assembly.

The optical module 14 includes, as main elements, a metal upper case and a lower plate that form an outer shell, a module substrate that is positioned at a predetermined position in a housing space formed between the upper case and the lower plate. It is configured.

The upper case as the upper member has an open lower end. At one end of the upper case, as shown in FIG. 4, a thin plate-like protective wall 143 that is continuous with the upper surface and both side surfaces of the upper case and protrudes in the longitudinal direction is formed in a gate shape. The distal end portion of the protective wall 143 has an arc portion that is rounded in the thickness direction, as shown partially enlarged in FIGS. 4 and 6. In addition, the front-end | tip part of the protective wall 143 is not restricted to such an example, For example, in FIG. 4, you may have a slope part which goes to the diagonally downward direction by chamfering. The protective wall 143 is used to protect a plug connector 146 described later when the optical module 14 is accidentally dropped. A latch mechanism (not shown) is provided at the other end of the upper case. The latch mechanism includes a release plate and a latch lever. When a latch lever (not shown) is rotated in one direction, the locking piece of the release plate is moved and released from a lock piece 129 (see FIG. 2) described later to be unlocked. Further, when the latch lever is rotated in the other direction, the locking piece of the release plate is locked to the lock piece 129 of the receptacle cage 12 described later. As a result, the optical module 14 is locked with respect to the receptacle cage 12.

The module substrate has an electrode portion constituting a plug connector 146 as a connection end portion at one end portion. A plurality of contact pads are arranged in parallel with each other at a predetermined interval on a common plane on the front surface and the back surface of the electrode portion formed at the distal end portion of the plug connector 146.

The plate-like lower plate as the lower member is fixed to the lower end of the upper case with a small screw so as to cover the opening at the lower end of the upper case.

An optical connector connected to one end of an optical cable (not shown) is connected to a port provided at the end of the optical module 14. The other end of the optical cable is connected to, for example, an optical connector of another housing constituting a communication system (not shown).

The above-described module substrate has a plug connector 146 as a connection end. However, the present invention is not limited to such an example. For example, the module substrate may be replaced with a plug connector as a connection end. You may have an edge terminal in a front-end | tip part.

As shown in FIG. 2, the optical module receptacle assembly is disposed on the printed circuit board 16 in the receptacle cage 12 that detachably accommodates the optical module 14 described above, and in each receptacle connector accommodating portion of the receptacle cage 12. The main component includes a receptacle connector 22 to be accommodated and a cover 24 having a plurality of connector accommodating portions for individually accommodating the receptacle connectors 22.

As shown in FIG. 2, the receptacle cage 12 is made of, for example, stainless steel or phosphor bronze thin plate, preferably stainless steel having high thermal conductivity, or phosphor bronze by pressing. The receptacle cage 12 has compartments 121, 122, 123, and 124 formed of a module housing portion and a receptacle connector housing portion inside. The compartments 121, 122, 123, and 124 are arranged in parallel along the Y coordinate axis extending in a direction orthogonal to the attaching / detaching direction of the optical module 14 in the orthogonal coordinates in FIG. 2. Since the compartments 121, 122, 123, and 124 have the same structure, the compartment 121 will be described, and the description of the other compartments 122, 123, and 124 will be omitted.

The module housing portion in the compartment 121 is formed by being surrounded by the side wall 126 and the partition wall 125 facing each other with a predetermined interval and the bottom wall portion 12BP. The side wall 126 and the partition wall 125 extend along the X coordinate axis in FIG. 2, that is, the attaching / detaching direction of the optical module 14. Each of the side wall 126 and the partition wall 125 has a lock piece 129 in the vicinity of a module slot described later. The lock pieces 129 in the side wall 126 and the partition wall 125 face each other. Each lock piece 129 is selectively engaged with a locking piece of a release plate of the optical module 14 so that the optical module 14 is locked with respect to the module housing portion.

The module housing part has a module slot that opens in the X coordinate axis direction at one end. Thereby, the optical module 14 is attached and detached through the module slot. A cylindrical front EMI finger 13 is provided on the entire periphery of the module slot having a substantially rectangular cross section. The partition wall 125 is also provided with other front EMI fingers (not shown). The front EMI finger 13 and the other front EMI fingers constitute a shield member. The inner peripheral portion of the front EMI finger 13 is in contact with the outer peripheral portion of the optical module 14 to be inserted, and the outer peripheral portion of the front EMI finger 13 is in contact with, for example, the peripheral edge of the opening of the housing described above. Become.

Thereby, when the receptacle cage 12 is press-fitted into the opening of the casing, the gap between the opening of the casing and the outer periphery of the receptacle cage 12 is caused by the shield member including the metal front EMI finger 13. Since it is shielded, the noise is confined in the above-described casing, and there is no possibility that the noise leaks to the outside through the gap between the outer peripheral portion of the optical module 14 and the inner peripheral portion of the module housing portion.

Also, the other end of the module housing portion that faces the module slot communicates with the receptacle connector housing portion. An opening that opens along the Z-coordinate axis in FIG. 2 is formed in a portion of the receptacle cage 12 that faces the bottom wall 12BP. A heat sink support mechanism for detachably supporting a heat sink 26 described later is provided at the periphery of the opening. A heat sink support mechanism for detachably supporting the heat sink 26 is also provided in the compartments 122, 123, and 124. Thereby, each heat sink 26 is selectively disposed in the receptacle cage 12 via the heat sink support mechanism so as to close the above-described openings of the compartments 121, 122, 123 and the compartment 124.

The heat sink 26 is made of a metal having good thermal conductivity such as aluminum. The heat sink 26 has a plurality of fins 26Fi (i = 1 to n, n are positive integers) arranged in parallel with each other along the X coordinate axis at a predetermined interval. The plurality of fins 26Fi are formed substantially perpendicular to the flat surface of the base portion 26M supported by the heat sink support mechanism. As shown in an enlarged view in FIG. 3, a pair of flange portions 26F are formed on both sides of the base portion 26M so as to face each other by a predetermined length. An elongated groove 26GA is formed between the connecting portion where the lower ends of the plurality of fins 26Fi are connected to each other and the flange portion 26F. The elongated groove 26GA is formed on the bent pieces 126S2 and the three pressing springs 126S1 formed at the upper end of the side wall 126, and the bent pieces 127S2 and the three pressing springs 127S1 of the top plate 127 provided at the upper end of the partition wall 125. It is slidably engaged. At one end in the longitudinal direction of the base portion 26M, a pressing end portion 26EF is formed as shown in an enlarged manner in FIG. The pressing end portion 26EF has a width that is smaller than the width of the central portion of the base portion 26M, and abuts on a return leaf spring 12LF described later. Further, an extending portion 26ER is formed at the other end in the longitudinal direction of the base portion 26M. The extending part 26ER has a width Hc that is smaller than the width of the center part of the base part 26M, and extends from one end of the flange part 26F along the longitudinal direction of the base part 26M. The width Hc is set slightly smaller than the distance Lc (see FIG. 1) between guide pieces of a guide plate 12RP described later. A groove 26EG is formed on the end surface of the extending portion 26ER to be locked to a locking portion of a guide plate 12RP described later when the heat sink 26 is mounted. When the optical module 14 is mounted in the receptacle cage 12, the heat transfer surface of the base portion 26 </ b> M including the extending portion 26 </ b> ER has an upper plate and a protective wall portion 143 of the optical module 14 as shown in FIG. 4. The heat from the optical module 14 is dissipated through the heat sink 26. At this time, the heat transfer surface of the extension part 26ER and the surface of the protective wall part 143 come into contact with each other, so that the heat transfer area is further expanded, so that the optical module 14 can be cooled more efficiently. Further, the strength of the heat sink 26 is improved by the extending portion 26ER.

As shown in FIG. 2, the heat sink support mechanism described above includes a bent piece 126S2, three pressing springs 126S1 formed at a bent portion formed at the uppermost end of the side wall 126 constituting the receptacle cage 12, Bending pieces 127S2 and three pressing springs 127S1 formed on the top plate 127 provided at the upper end of the partition wall 125, and three bending pieces 128S2 formed on the bending portion formed at the uppermost end of the side wall 128 and three pressings. And a spring 128S1.

As heat sink fixing means, there are a guide plate 12RP provided on the back surface of the receptacle cage 12, and a leaf spring 12LF for urging the groove 26EG of the extending portion 26ER of the heat sink 26 toward the engaging portion of the guide plate 12RP. The receptacle cage 12 is provided.

The pressing spring 126S1 and the bent piece 126S2 of the side wall 126 and the top plate 127 provided at the upper end of the partition wall 125 are formed to face each other at a predetermined interval on a common plane. One end of the side walls 126 and 128 and one end of each partition wall 125 are connected by a guide plate 12RP extending along the Y coordinate axis in FIG.

The guide plate 12RP is formed to be connected to one end of the side walls 126 and 128 and one end of each partition wall 125 to form a cover fixing portion that forms the back portion of the receptacle cage 12, and an upper end portion of the cover fixing portion. Guide pieces 12RT1, 12RT2, 12RT3, 12RT4, and 12RT5.

Both ends along the longitudinal direction of the cover fixing portion are locked to the outer peripheral portions of the side walls 126 and 128, respectively. As shown in an enlarged view in FIG. 5, the cover fixing portion is formed with a pair of ejecting leaf springs 12 RPSf on a common straight line. Each pair of ejecting leaf springs 12RPSf is formed to correspond to the compartments 121, 122, 123, and 124, respectively. A rectangular opening into which a claw portion of a cover 24 described later is inserted is formed at a position below the pair of ejection plate springs 12RPSf. Thereby, the cover 24 is fixed to the guide plate 12RP. Each pair of ejecting leaf springs 12RPSf urges the protective wall portion 143 of each mounted optical module 14 to be pushed out of the receptacle cage 12 by a predetermined amount to the outside through the module slot.

As shown in FIG. 1, the guide pieces 12RT1, 12RT2, 12RT3, 12RT4, and 12RT5 are placed and locked on the upper part of one end of the side walls 126 and 128 and the upper part of one end of each partition wall 125, respectively. Has been. The guide pieces 12RT1, 12RT2, 12RT3, 12RT4, and 12RT5 are formed in parallel to each other and extend a predetermined distance toward the bent pieces 126S2, 127S2, and 128S2. As shown in FIG. 1, the tip portions of the guide pieces 12RT1, 12RT2, 12RT3, 12RT4, and 12RT5 are positions separated from the ends of the bent piece 126S2, the bent piece 127S2, and the bent piece 128S2, respectively, by a predetermined distance Ld. Is formed. As a result, as shown in FIG. 2 in an enlarged manner, the bent piece 126S2, the bent pieces 127S2 and 128S2 are respectively heat sinks in a state in which the pressing end portion 26EF is inclined obliquely to the left and downward toward the module housing portion. It is easily inserted into each of the 26 elongated grooves 26GA.

One end of the guide piece 12RT1 and the guide piece 12RT2, one end of the guide piece 12RT2 and the guide piece 12RT3, one end of the guide piece 12RT3 and the guide piece 12RT4, and one end of the guide piece 12RT4 and the guide piece 12RT5 face each other with a predetermined distance Lc. Are connected to each other. The predetermined distance Lc is set slightly smaller than the width of the protective wall portion 143 of the optical module 14. Thereby, a notch is formed between them. Further, the guide piece 12RT2, the guide piece 12RT3, and the guide piece 12RT4 each protrude into the adjacent compartment.

The heat sink 26 described above is provided between the guide piece 12RT1 and the guide piece 12RT2, between the guide piece 12RT2 and the guide piece 12RT3, between the guide piece 12RT3 and the guide piece 12RT4, and between the guide piece 12RT4 and the guide piece 12RT5. The extended portion 26ER is inserted. The one end of the guide piece 12RT1 and the guide piece 12RT2, the one end of the guide piece 12RT2 and the guide piece 12RT3, the one end of the guide piece 12RT3 and the guide piece 12RT4, and the portion between the one end of the guide piece 12RT4 and the guide piece 12RT5 are respectively described above. The groove 26EG of the extending portion 26ER of the heat sink 26 is a locking portion that is locked.

The bent portion 12RS formed integrally with the guide piece 12RT1 and the bent portion (not shown) formed integrally with the guide piece 12RT5 are locked to the outer peripheral portions of the side walls 126 and 128, respectively.

The positions of the guide pieces 12RT1, 12RT2, 12RT3, 12RT4, and 12RT5 are set to positions that are lower than the position of the top plate 127 by a predetermined dimension ΔH, as shown in FIGS. 7A and 7B. Further, the distance ΔGa between the inner peripheral portion of the guide pieces 12RT1, 12RT2, 12RT3, 12RT4, and 12RT5 and the upper surface of the outer peripheral portion of the cover 24 is larger than the thickness T of the protective wall portion 143 of the optical module 14. Is set to The distance ΔGa is such that when the protective wall 143 is inserted between the guide piece 12RT1 and the upper surface of the outer periphery of the cover 24, the gap between the upper surface of the protective wall 143 and the inner peripheral surface of the guide piece 12RT1 is It is set to be larger than the gap between the slit of the cover 24 and the plug connector 146.

As shown in FIG. 1 and FIG. 2, the bent portion of the side wall 126 has three pressing springs 126S1 that urge one flange portion 26F of the heat sink 26 downward with a predetermined interval on a common straight line. Is formed. The base end of each pressing spring 126S1 is formed integrally with the bent portion of the side wall 126, and the end of each pressing spring 126S1 extends toward the bent piece 126S2 and has a bent portion that can be elastically displaced along the Z coordinate axis. is doing. The bent portion has a curvature corresponding to the height of each elongated groove 26GA of the heat sink 26.

Also on the top plate 127, pressing springs 127S1 for urging the other flange portion 26F of the heat sink 26 are formed at three positions on the common straight line with a predetermined interval. The base end of each pressing spring 127S1 is formed integrally with the top plate 127, and the end of each pressing spring 127S1 extends toward the bent piece 127S2 and has a bent portion that can be elastically displaced along the Z coordinate axis. Yes. The bent portion has a curvature corresponding to the height of each elongated groove 26GA of the heat sink 26. Thereby, when the heat sink 26 is not attached, even when the optical module 14 is inserted, the optical module 14 does not interfere with the pressing spring 126S1 and the pressing spring 127S1, and there is no possibility that the bent portion is buckled. .

The other end of the side wall 126 and the partition wall 125 and the other end of the side wall 128 are connected by a connecting portion provided with a front EMI finger 13 that forms the periphery of the module slot. A return leaf spring 12LF is integrally formed at a portion of the connecting portion facing each locking portion of the guide plate 12RP. The return leaf spring 12LF has a movable piece that can be elastically displaced along the X coordinate axis. The movable piece of the return leaf spring 12LF urges the entire heat sink 26 toward each locking portion of the guide plate 12RP. The return leaf spring 12LF is not limited to such an example. For example, the return leaf spring 12LF may be formed separately and fixed to the connecting portion.

The end of the bottom wall portion 12BP connecting the side wall 126 and the lower end of the partition wall 125 is in contact with the mounting surface of the printed wiring board 16. Further, the end portion of the bottom wall portion 12BP is in contact with one side of an annular grounding contact pad formed on the mounting surface of the printed wiring board 16. As a result, the receptacle cage 12 is grounded.

A plurality of press-fit claw portions Ta are formed at predetermined intervals on the lower ends of the side wall 126, the partition wall 125, and the side wall 128, respectively. As shown in FIG. 2, each press-fit claw portion Ta is press-fitted into each pore formed on the surface of the printed wiring board 16 corresponding to the arrangement of the press-fit claw portions Ta. As a result, the lower end surface of the receptacle cage 12 is tightly fixed to the surface of the printed wiring board 16.

The receptacle connector housing portion that opens toward the surface of the printed wiring board 16 is surrounded by the receptacle connector side closed end facing the module slot in the receptacle cage 12 and the receptacle connector side portion of the side wall 126 and the partition wall 125. Is formed.

A plurality of flange portions for screwing the receptacle cage 12 to the mounting surface of the printed wiring board 16 are provided on the outer sides of the side surface and the rear surface of the receptacle cage 12.

The cover 24 is made of, for example, a metal material by die casting, and is formed by connecting fraction portions inserted into the compartments 121, 122, 123, and 124 of the receptacle cage 12 to each other. It has an outer part. The outer shell portion is composed of a pair of side walls facing each other, and a top plate portion connecting the upper end portion of one side wall and the upper end portion of the other side wall. In the portion of the cover 24 that faces each module housing portion, a slit through which the tip of the plug connector 146 of the optical module 14 passes is formed.

A groove corresponding to the partition wall 125 is formed at the boundary portion between the portions of the cover 24 inserted into the adjacent compartments 121 and 122. Further, a groove corresponding to the partition wall 125 is also formed at the boundary portion between the portions inserted into the adjacent compartments 122 and 123. Furthermore, a groove corresponding to the partition wall 125 is also formed in a boundary portion between portions inserted into the adjacent compartments 123 and 124. When the optical module 14 is inserted into the receptacle cage 12 in each groove, one side wall of the upper case of each optical module 14 adjacent to the partition wall 125 is inserted. As a result, each optical module 14 is accurately positioned with respect to the cover 24.

A plurality of claw portions 24n are formed on the back surface of the outer portion of the cover 24 as shown in an enlarged view in FIG. Each of the plurality of claw portions 24n is engaged with each opening portion of the above-described guide plate 12RP that forms the receptacle connector side closed end portion.

Connector accommodating portions are respectively formed inside the fraction portions inserted into the compartments 121, 122, 123, and 124 in the cover 24, respectively. Adjacent connector housing portions are each partitioned by a partition wall.

The receptacle connectors arranged inside the fractional portion of the cover 24 have the same structure. As shown in an enlarged view in FIG. 4, the receptacle connector 22 includes a connector insulator having a slot into which the plug connector 146 of the optical module 14 is detachably inserted, and a plurality of contact terminals CT1 and CT2. ing.

The contact terminals CT1 and CT2 are to electrically connect the plug connector 146 of the optical module 14 to an electrode group connected to the conductor pattern of the printed wiring board 16, respectively. A plurality of positioning pins (not shown) that fit into the positioning holes of the printed wiring board 16 are formed on the bottom of the connector insulator.

In such a configuration, when the heat sinks 26 are fixed to the compartments of the receptacle cage 12 from the guide plate 12RP side, the attachment work is the same as the attachment work. Explanation will be omitted, and description of the attachment work for other compartments will be omitted.

First, as shown in FIG. 2, the posture of the heat sink 26 is set to the module housing portion so that the bent piece 126S2 and the bent piece 127S2 are respectively inserted into the opening ends of the elongated grooves 26GA of the heat sink 26 through the openings. Tilt against. Next, the heat sink 26 has its pressing end 26EF in the moving direction against the movable piece of the return leaf spring 12LF so that each pressing spring 126S1 and each pressing spring 127S1 is inserted into the elongated groove 26GA of the heat sink 26. After the contact, the return leaf spring 12LF is further pushed against the elastic force of the movable piece. At that time, a predetermined gap is formed between the locking portion of the guide plate 12RP and the end surface of the extending portion 26ER. Further, when the heat sink 26 is inserted, the pressing spring 126S1 and the pressing spring 127S1 are not likely to be deformed because the heat sink 26 is inserted into the groove 26GA from a bent portion having a size corresponding to the height of the groove 26GA.

And when the heat sink 26 is released, the groove 26EG of the extending part 26ER is locked with respect to the engaging part. Thereby, the attachment of the heat sink 26 is completed.

On the other hand, when removing the heat sink 26 from the receptacle cage 12 in an unlocked state, first, the heat sink 26 is pushed against the elastic force of the movable piece of the return leaf spring 12LF, and the groove 26EG of the extending portion 26ER is engaged. It is made into an unlocking state with respect to a stop part. Next, after a predetermined gap is formed between the end surface of the extending portion 26ER and the locking portion, the end of the heat sink 26 is pulled up directly, whereby the heat sink 26 is removed from the receptacle cage 12. .

7A, when the optical module 14 is inserted into the compartment 121 of the receptacle cage 12 in a state where the heat sink 26 is removed from the receptacle cage 12, as shown in FIG. 14 even when the protective wall portion 143 of the optical module 14 is inserted in a lifted posture, the tip of the protective wall portion 143 of the optical module 14 abuts against the end portions of the guide pieces 12RT1 and 12RT2 of the guide plate 12RP. As shown in FIG. 7B, the distal end portion of the protective wall portion 143 is pushed down in the direction indicated by the arrow, guided to the gap below the guide pieces 12RT1 and 12RT2, and then a pair of ejectors along the direction indicated by the arrow. It will be pushed against the urging force of the leaf spring 12RPSf. As a result, the plug connector 146 of the optical module 14 is smoothly connected to the receptacle connector 22 without being damaged.

FIG. 8 shows a second embodiment of a receptacle assembly that constitutes a part of a transceiver module assembly according to the present invention, together with a printed wiring board disposed inside a predetermined housing.

FIG. 8 shows a state where a plurality of optical modules 14 and a plurality of heat sinks described later are removed. 8 to 10B, the same components in the example shown in FIG. 2 are denoted by the same reference numerals, and redundant description thereof is omitted. In FIG. 8, four receptacle cages are mounted on one printed wiring board 16, but the present invention is not limited to this example, and five or more receptacle cages are formed on one printed wiring board. 16 may be implemented.

The transceiver module assembly includes the above-described optical module 14 and the optical module receptacle assembly.

As shown in FIG. 8, the optical module receptacle assembly is accommodated in a receptacle cage 32 that is arranged on a printed wiring board 16 and detachably accommodates the optical module 14 described above, and a receptacle connector accommodating portion of the receptacle cage 32. The receptacle connector 22 and the cover 24 having a plurality of connector accommodating portions for individually accommodating the receptacle connectors 22 are included as main elements.

As shown in FIG. 8, the receptacle cage 32 is made of, for example, a stainless steel or phosphor bronze thin plate, preferably stainless steel or phosphor bronze having good thermal conductivity, by pressing. The receptacle cage 32 has compartments 321, 322, 323, and 324 including a module housing portion and a receptacle connector housing portion inside. The compartments 321, 322, 323, and 324 are arranged in parallel along the Y coordinate axis that extends in a direction orthogonal to the attaching / detaching direction of the optical module 14 in orthogonal coordinates in FIG. 8. Since the compartments 321, 322, 323, and 324 have the same structure, the compartment 321 will be described, and the description of the other compartments 322, 323, and 324 will be omitted.

The module housing portion in the compartment 321 is formed by being surrounded by a side wall 326 and a partition wall 325 facing each other with a predetermined interval, and a bottom wall portion 32BP. The side wall 326 and the partition wall 325 extend along the X coordinate axis in FIG. 2, that is, the attaching / detaching direction of the optical module 14. Each of the side wall 326 and the partition wall 325 has a lock piece 329 in the vicinity of a module slot described later. The lock pieces 329 in the side wall 326 and the partition wall 325 face each other. Each lock piece 329 is selectively engaged with a locking piece of a release plate of the optical module 14 so that the optical module 14 is locked with respect to the module housing portion.

The module housing part has a module slot that opens in the X coordinate axis direction at one end. Thereby, the optical module 14 is attached and detached through the module slot. A cylindrical front EMI finger 13 is provided on the entire periphery of the module slot having a substantially rectangular cross section. The partition wall 325 is also provided with other front EMI fingers (not shown). The front EMI finger 13 and the other front EMI fingers constitute a shield member. The inner peripheral portion of the front EMI finger 13 is in contact with the outer peripheral portion of the optical module 14 to be inserted, and the outer peripheral portion of the front EMI finger 13 is in contact with, for example, the peripheral edge of the opening of the housing described above. Become.

Thereby, when the receptacle cage 32 is press-fitted into the opening of the housing, the gap between the opening of the housing and the outer periphery of the receptacle cage 32 is caused by the shield member including the metal front EMI finger 13. Since it is shielded, the noise is confined in the above-described casing, and there is no possibility that the noise leaks to the outside through the gap between the outer peripheral portion of the optical module 14 and the inner peripheral portion of the module housing portion.

Also, the other end of the module housing portion that faces the module slot communicates with the receptacle connector housing portion. In the portion of the receptacle cage 32 facing the bottom wall portion 32BP, an opening that opens along the Z coordinate axis in FIG. 8 is formed. A heat sink support mechanism that detachably supports a heat sink 36 to be described later is provided at the periphery of the opening. A heat sink support mechanism that detachably supports the heat sink 36 is also provided in the compartments 322, 323, and 324. Thereby, each heat sink 36 is selectively disposed in the receptacle cage 32 via the heat sink support mechanism so as to close the above-described openings of the compartments 321, 322, 323 and the compartment 324.

The heat sink 36 is made of a metal having good thermal conductivity such as aluminum. As shown in an enlarged view in FIG. 9, the heat sink 36 has a plurality of fins 36Fi (i = 1 to n, n is a positive integer) arranged in parallel with each other along the X coordinate axis at a predetermined interval. ing. The plurality of fins 36Fi are formed substantially perpendicular to the flat surface of the base portion 36M supported by the heat sink support mechanism. A pair of flange portions 36F are formed on both sides of the base portion 36M so as to face each other by a predetermined length. An elongated groove 36GA is formed between the connecting portion where the lower ends of the plurality of fins 36Fi are connected to each other and the flange portion 36F. The elongated groove 36GA has a bent piece 326S2 formed at the upper end portion of the side wall 326, two pressing springs 326S1, and a bent piece 327S2 of the top plate 327 provided at the upper end of the partition wall 325, and the two pressing springs 327S1. It is slidably engaged. A pressing end 36EF is formed at one end of the base portion 36M in the longitudinal direction. The pressing end portion 36EF has a width that is smaller than the width of the central portion of the base portion 36M, and abuts on a return leaf spring 32LF described later. Further, a groove 36EG that is locked to a locking portion of a guide plate 32RP described later when the heat sink 36 is mounted is formed in the locking end 36ER in the longitudinal direction of the base portion 36M. When the optical module 14 is mounted in the receptacle cage 32, the heat transfer surface of the base portion 36M comes into contact with the upper plate of the optical module 14 and the surface of the protective wall portion 143. The heat is dissipated through 36. At this time, the entire surface of the upper plate of the inserted optical module 14 comes into contact with the heat transfer surface of the base portion 36M, so that the extinction area is further expanded, so that the optical module 14 can be cooled more efficiently.

As shown in FIG. 8, the heat sink support mechanism described above includes a bent piece 326S2 formed at a bent portion formed at the uppermost end of the side wall 326 constituting the receptacle cage 32, two pressing springs 326S1, A bent piece 327S2 formed on the top plate 327 provided at the upper end of the partition wall 325, two pressing springs 327S1, and a bent piece 328S2 formed on the bent portion formed at the uppermost end of the side wall 328, two pressed And a spring 128S1.

As a heat sink fixing means, a guide plate 32RP provided on the back surface portion of the receptacle cage 32 and a leaf spring 32LF that urges the groove 36EG of the heat sink 36 toward the engaging portion of the guide plate 32RP are included in the receptacle cage 32. Is provided.

The pressing spring 326S1 and the bent piece 326S2 of the side wall 326 and the top plate 327 provided at the upper end of the partition wall 325 are formed to face each other at a predetermined interval on a common plane. One end of each of the side walls 326 and 328 and one end of each partition wall 325 are connected by a guide plate 32RP extending along the Y coordinate axis in FIG.

The guide plate 32RP is formed so as to be connected to one end of the side walls 326 and 328 and one end of each partition wall 325 to form a cover fixing portion that forms the back portion of the receptacle cage 32, and an upper end portion of the cover fixing portion. Guide pieces 32RT1, 32RT2, 32RT3, and 32RT4.

Both ends along the longitudinal direction of the cover fixing portion are locked to the outer peripheral portions of the side walls 326 and 328, respectively. The cover fixing portion is formed with a pair of ejecting leaf springs 32RPSf on a common straight line. Each pair of ejecting leaf springs 32RPSf is formed corresponding to the compartments 321, 322, 323, and 324, respectively. A rectangular opening into which the claw 24n of the cover 24 is inserted is formed at a position below the pair of ejection leaf springs 32RPSf. Thereby, the cover 24 is fixed to the guide plate 32RP. Each pair of ejection leaf springs 32RPSf urges the protective wall portion 143 of each mounted optical module 14 to be pushed out from the receptacle cage 32 by a predetermined amount to the outside through the module slot.

The guide pieces 32RT1, 32RT2, 32RT3, and 32RT4 are placed and locked on the top of one end of the side walls 326 and 328 and the top of one end of each partition wall 325. The guide pieces 32RT1, 32RT2, 32RT3, and 32RT4 are formed in parallel to each other and extend by a predetermined distance toward the bent pieces 326S2, 327S2, and 328S2. The distal ends of the guide pieces 32RT1, 32RT2, 32RT3, and 32RT4 are formed at positions separated from the ends of the bent pieces 326S2, the bent pieces 327S2, and the bent pieces 328S2 by a predetermined distance, respectively. Accordingly, the bent pieces 326S2, the bent pieces 327S2 and 328S2 are easily inserted into the respective elongated grooves 36GA of the heat sink 36 in a state where the pressing end portion 36EF is inclined obliquely to the left and downward toward the inside of the module housing portion. The

One end of each of the guide piece 32RT1 and the guide piece 32RT2 and one end of the guide piece 32RT3 and the guide piece 32RT4 serve as a locking portion to which the groove 36EG of the heat sink 36 described above is locked.

The bent portion 32RS formed integrally with the guide piece 32RT1 and the bent portion (not shown) formed integrally with the guide piece 32RT4 are locked to the outer peripheral portions of the side walls 326 and 328, respectively.

The positions of the guide pieces 32RT1, 32RT2, 32RT3, and 32RT4 are set to positions that are lower than the position of the top plate 327 by a predetermined dimension ΔH, as shown in FIGS. 10A and 10B. Further, the distance ΔGa between the inner peripheral part of the guide pieces 32RT1, 32RT2, 32RT3, and 32RT4 and the upper surface of the outer peripheral part of the cover 24 is set to be larger than the thickness T of the protective wall part 143 of the optical module 14. Has been. Further, when the protective wall 143 is inserted between the guide piece 32RT1 and the upper surface of the outer peripheral portion of the cover 24, the distance ΔGa is a gap between the upper surface of the protective wall 143 and the inner peripheral surface of the guide piece 32RT1. It is set to be larger than the gap between the slit of the cover 24 and the plug connector 146.

In the bent portion of the side wall 326, two pressing springs 326S1 that urge one flange portion 36F of the heat sink 36 downward are formed on a common straight line at predetermined intervals. The base end of each pressing spring 326S1 is formed integrally with the bent portion of the side wall 326, and the end of each pressing spring 326S1 has a bent portion that extends toward the bent piece 326S2 and can be elastically displaced along the Z coordinate axis. is doing. The bent portion has a curvature corresponding to the height of each elongated groove 36GA of the heat sink 36.

Also on the top plate 327, the pressing springs 327S1 for biasing the other flange portion 36F of the heat sink 36 are formed at two positions on the common straight line with a predetermined interval. The base end of each pressing spring 327S1 is formed integrally with the top plate 327, and the end of each pressing spring 327S1 extends toward the bent piece 327S2 and has a bent portion that can be elastically displaced along the Z coordinate axis. Yes. The bent portion has a curvature corresponding to the height of each elongated groove 36GA of the heat sink 36. Thereby, even when the optical module 14 is inserted when the heat sink 36 is not attached, the optical module 14 does not interfere with the pressing spring 326S1 and the pressing spring 327S1, and there is no possibility that the bent portion is buckled. .

The other end of the side wall 326 and the partition wall 325 and the other end of the side wall 328 are connected by a connecting portion provided with a front EMI finger 13 that forms the periphery of the module slot. A return leaf spring 32LF is integrally formed at a portion of the connecting portion facing each locking portion of the guide plate 32RP. The return leaf spring 32LF has a movable piece that can be elastically displaced along the X coordinate axis. The movable piece of the return leaf spring 32LF urges the entire heat sink 26 toward each locking portion of the guide plate 32RP. The return leaf spring 32LF is not limited to such an example. For example, the return leaf spring 32LF may be formed separately and fixed to the connecting portion.

The end portion of the bottom wall portion 32BP that connects the lower ends of the side wall 326 and the partition wall 325 is in contact with the mounting surface of the printed wiring board 16. Further, the end portion of the bottom wall portion 32BP is in contact with one side of an annular grounding contact pad formed on the mounting surface of the printed wiring board 16. As a result, the receptacle cage 32 is grounded.

A plurality of press-fit claw portions Ta are formed at predetermined intervals on the lower ends of the side wall 326, the partition wall 325, and the side wall 328, respectively. As shown in FIG. 8, each press-fit claw portion Ta is press-fitted into each pore formed on the surface of the printed wiring board 16 corresponding to the arrangement of the press-fit claw portions Ta. As a result, the lower end surface of the receptacle cage 32 is tightly fixed to the surface of the printed wiring board 16.

The receptacle connector housing portion that opens toward the surface of the printed circuit board 16 is surrounded by the receptacle connector side closed end facing the module slot in the receptacle cage 32, and the side wall 326 and the receptacle connector side portion of the partition wall 325. Is formed.

A plurality of flange portions for screwing the receptacle cage 32 to the mounting surface of the printed wiring board 16 are provided on the outer periphery of the side surface and the rear surface of the receptacle cage 32, respectively.

In such a configuration, when the heat sinks 36 are fixed to the compartments of the receptacle cage 32 from the guide plate 32RP side, the attachment work is the same attachment work. Explanation will be omitted, and description of the attachment work for other compartments will be omitted.

First, the posture of the heat sink 36 is inclined with respect to the module housing portion so that the bent piece 326S2 and the bent piece 327S2 are inserted into the opening ends of the elongated grooves 36GA of the heat sink 36 through the openings, respectively. Next, the heat sink 36 has its pressing end 36EF in the advancing direction against the movable piece of the return leaf spring 32LF so that each pressing spring 326S1 and each pressing spring 327S1 is inserted into the elongated groove 36GA of the heat sink 36. After the contact, the return leaf spring 32LF is further pushed against the elastic force of the movable piece. At that time, a predetermined gap is formed between the locking portion of the guide plate 32RP and the end surface of the locking end 36ER. Further, when the heat sink 36 is inserted, the pressing spring 326S1 and the pressing spring 327S1 are not likely to be deformed because the heat sink 36 is inserted into the groove 36GA from a bent portion having a size corresponding to the height of the groove 36GA.

When the heat sink 36 is released, the groove 36EG of the locking end 36ER is locked with respect to the locking portion. Thereby, the attachment of the heat sink 36 is completed.

On the other hand, when the heat sink 36 is unlocked from the receptacle cage 32 and removed, the heat sink 36 is first pushed against the elastic force of the movable piece of the return leaf spring 32LF, and the groove 36EG of the locking end 36ER is engaged. It is made into an unlocking state with respect to a stop part. Next, after a predetermined gap is formed between the end face of the locking end 36ER and the locking portion, the end of the heat sink 36 is pulled straight up, whereby the heat sink 36 is removed from the receptacle cage 32. .

10A, when the optical module 14 is inserted into the compartment 321 of the receptacle cage 32 in a state where the heat sink 36 is removed from the receptacle cage 32, the optical module is temporarily installed. 14B, even if the protective wall portion 143 of the optical module 14 is inserted in a lifted posture, the distal end portion of the protective wall portion 143 of the optical module 14 comes into contact with the end portion of the guide piece 32RT1 of the guide plate 32RP. As shown in FIG. 3, after the front end of the protective wall 143 is pushed down in the direction indicated by the arrow and guided in the gap below the guide piece 32RT1, the pair of eject leaf springs 32RPSf is moved along the direction indicated by the arrow. It will be pushed against the urging force. As a result, the plug connector 146 of the optical module 14 is smoothly connected to the receptacle connector 22 without being damaged.

In the example of the receptacle assembly according to the present invention described above, the receptacle cages 12 and 32 have four compartments. However, the present invention is not limited to this example. For example, one to three receptacle cages may be used. It may have a compartment or five or more compartments.

Furthermore, in the above-described example, the optical module 14 accommodates one module board, and the receptacle connectors 22 each have one slot into which the connection end of one module board is inserted. However, the present invention is not limited to such an example. For example, the optical module accommodates two module boards in a two-layered manner with a predetermined interval, and the receptacle connector has a connection end portion of each of the module boards. It may have two slots to be inserted. In such a case, for example, the cover has two slits into which connection end portions of two module substrates are respectively inserted.

Claims (7)

A bottom wall having at least one module slot through which an optical module including a module substrate having a connection end at one end passes, and which detachably accommodates the optical module and contacts the lower surface of the optical module For a receptacle comprising: at least one module housing portion having a portion; and at least one connector housing portion for housing a connector that communicates with the module housing portion and to which a connection end of the module substrate is detachably connected. The cage,
A heat sink that is selectively disposed in the receptacle cage and that contacts the outer periphery of the optical module through a heat transfer surface having an area corresponding to the area of the bottom wall, and dissipates heat generated from the optical module;
A heat sink support mechanism that is disposed in the receptacle cage and supports the heat sink so as to be slidable along an attaching / detaching direction of the optical module when the heat sink is arranged in the receptacle cage;
When the heat sink is not disposed, the tip of the connection end of the optical module inserted through the module slot is guided from the connection end of the optical module so as to be guided to the connector. A guide plate member that is brought into contact with the distal end portion of the outer shell portion protruding toward the connector and guides the distal end portion into the connector housing portion,
A receptacle assembly comprising a heat sink comprising: The said guide plate member has a notch part in the position which becomes above the said connector accommodating part, The heat-transfer surface of the said heat sink has an extension part inserted in this notch part. A receptacle assembly comprising the described heat sink. The receptacle assembly having a heat sink according to claim 1, wherein the guide plate member is fixed to a side wall of the receptacle cage. A gap is formed between the inner peripheral surface of the guide plate member and the outer peripheral surface of the connector cover that covers the connector so that the protective wall of the optical module that protects the connection end portion is inserted. A receptacle assembly comprising a heat sink according to claim 1. The receptacle assembly having a heat sink according to claim 1, wherein the guide plate member is provided at a position lower than a position of the heat sink support mechanism in the receptacle cage. 2. The width in the direction perpendicular to the attaching / detaching direction of the optical module in the notch portion of the guide plate member is smaller than the width perpendicular to the attaching / detaching direction in the protective wall of the optical module. A receptacle assembly comprising the described heat sink. An optical module including a module substrate having a connection end at one end;
A receptacle assembly according to claim 1;
A transceiver module assembly comprising:

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