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EP-4741898-A1 - ELECTRONIC DEVICE

EP4741898A1EP 4741898 A1EP4741898 A1EP 4741898A1EP-4741898-A1

Abstract

A heat sink (heat conductive sheet) is pressed against a plug shell without sliding on the plug shell. In an electronic device 10, a heat sink 51 is supported to be movable in a first direction and a second direction relative to a receptacle shell 61. First pressing means 63 pressing the heat sink 51 in a positive first direction relative to the receptacle shell 61, and second pressing means 64 pressing the heat sink 51 in a negative second direction relative to the receptacle shell 61 are disposed. The receptacle shell 61 includes a guide portion (cam groove 62). The heat sink 51 includes a guided portion (columnar protrusion 57) guided by the guide portion (cam groove 62). The heat sink 51 and a plug connector 20 respectively include abutting surfaces 55 and 25 abutting on each other in the first direction when the plug connector 20 is inserted into an opening 42 of a receptacle housing 41.

Inventors

  • HASHIGUCHI, OSAMU

Assignees

  • Japan Aviation Electronics Industry, Limited

Dates

Publication Date
20260513
Application Date
20250902

Claims (11)

  1. An electronic device (10, 100), comprising: a plug connector (20) including a plug shell (21) and a plug housing (22); a receptacle housing (41) including an opening (42) into/from which the plug connector (20) is insertable/extractable; and a heat sink (51, 151) movably installed on the receptacle housing (41) by being installed through a receptacle shell (61, 161) attached to the receptacle housing (41), wherein when the plug connector (20) is inserted into the opening (42) of the receptacle housing (41) and a fitted state is established, the plug shell (21) and a heat releasing surface of the heat sink (51, 151) come into contact with each other, and the heat sink (51, 151) dissipates heat generated from the plug connector (20), when an insertion/extraction direction of the plug connector (20) into/from the opening (42) of the receptacle housing (41) is defined as a first direction, the extraction direction of the plug connector (20) from the opening (42) is defined as a positive first direction, the insertion direction is defined as a negative first direction, a direction orthogonal to the first direction is defined as a second direction, a direction in which the plug shell (21) and the heat releasing surface of the heat sink (51) are separated from each other is defined as a positive second direction, and a direction in which the plug shell (21) and the heat releasing surface of the heat sink (51, 151) come close to each other is defined as a negative second direction, the heat sink (51, 151) is supported to be movable in the first direction and the second direction relative to the receptacle shell (61, 161), first pressing means (63) configured to press the heat sink (51, 151) in the positive first direction relative to the receptacle shell (61, 161) and second pressing means (64, 164) configured to press the heat sink (51) in the negative second direction relative to the receptacle shell (61, 161) are disposed between the heat sink (51) and the receptacle shell (61, 161), the receptacle shell (61, 161) includes a guide portion (62) configured to lift up the heat sink (51, 151) in the positive second direction when the heat sink (51, 151) is at a position in the positive first direction relative to the receptacle shell (61, 161), and to enable the heat sink (51, 151) to move in the negative second direction when the heat sink (51, 151) is at a position in the negative first direction relative to the receptacle shell (61, 161), the heat sink (51, 151) includes a guided portion (57) configured to be guided by the guide portion (62) provided on the receptacle shell (61, 161), and the heat sink (51, 151) and the plug connector (20) include respective abutting surfaces abutting on each other in the first direction when the plug connector (20) is inserted into the opening (42) of the receptacle housing (41).
  2. The electronic device (10, 100) according to claim 1, wherein the plug housing (22) includes a locking portion (24) serving as fixing means, the receptacle housing (41) includes a locked portion (45) serving as fixed means, and when the plug connector (20) is inserted into the opening (42) of the receptacle housing (41) and the fitted state is established, the locking portion (24) and the locked portion (45) engage with each other to maintain the fitted state of the plug connector (20) to the receptacle housing (41) against pressing force by the first pressing means (63).
  3. The electronic device (10, 100) according to claim 1 or 2, wherein a clearance groove (58, 158) for releasing pressing force from the second pressing means (64, 164) is provided at a portion of the heat sink (51, 151) receiving the pressing force from the second pressing means (64, 164), in a state before the plug connector (20) is inserted into the opening (42) of the receptacle housing (41), the second pressing means (64, 164) is positioned at a formation position of the clearance groove to establish a state where all or part of the pressing force from the second pressing means (64, 164) is not applied to the heat sink (51), and when the plug connector (20) is inserted into the opening (42) of the receptacle housing (41) and the fitted state is established, the position of the second pressing means (64, 164) is deviated from the formation position of the clearance groove to establish a state where all or part of the pressing force from the second pressing means (64, 164) is applied to the heat sink (51, 151).
  4. The electronic device (100) according to any one of claims 1 to 3, wherein, when the plug connector (20) is inserted into the opening (42) of the receptacle housing (41) and the fitted state is established, a surface of the heat sink (151) receiving the pressing force from the second pressing means (164) is formed as an inclined surface (158a) directing at least a part of load components of the pressing force toward the first direction.
  5. The electronic device (10, 100) according to any one of claims 1 to 4, wherein each of the first pressing means (63) and the second pressing means (64, 164) is formed as a cantilever spring having a cantilever shape or a double-end supported spring having a double-end supported beam shape.
  6. The electronic device (10, 100) according to any one of claims 1 to 5, wherein an inequality of P1 > P2 is established, where P1 is pressing force of the first pressing means (63), and P2 is force in the negative first direction by pressing force of the second pressing means (64, 164).
  7. The electronic device (10, 100) according to any one of claims 1 to 6, wherein a heat conductive sheet (56) is installed on the heat releasing surface of the heat sink (51, 151).
  8. The electronic device (10, 100) according to any one of claims 1 to 7, wherein the guide portion (62) is formed as a cam groove having a groove shape, and the guide portion (62) has a substantially L-shaped groove shape.
  9. The electronic device (10, 100) according to claim 8, wherein the guided portion (57) is formed as a columnar protrusion to be fitted into the groove shape of the guide portion (62), and the substantially L-shaped groove shape of the guide portion (62) includes a guide shape configured to guide motion of the guided portion (57) inside the groove, the guide shape being formed by expanding a groove inner diameter of a right angle part bent in the substantially L-shape.
  10. The electronic device (10, 100) according to any one of claims 1 to 9, wherein the first pressing means (63) and the second pressing means (64, 164) are configured as members integrated with the receptacle shell (61, 161).
  11. The electronic device (10, 100) according to any one of claims 1 to 9, wherein the first pressing means (63) and the second pressing means (64, 164) are configured as members separated from the receptacle shell (61, 161).

Description

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an electronic device. Description of the Related Art An electronic device in recent years is required to have higher heat dissipation efficiency because power consumption of mounted electronic parts is increased along with demands such as for increase in communication speed and improvement in processing performance. Therefore, it is desirable to provide an electronic device that can reasonably achieve a high heat dissipation effect only by contact between solids, like an optical transceiver including a heat sink or the like. A structure of the electronic device of such a type is disclosed in, for example, Japanese Patent Laid-Open No. 2009-152428. An optical transceiver (13) as an existing electronic device disclosed in Japanese Patent Laid-Open No. 2009-152428 is of a type in which a transceiver housing (14) and a heat conductive sheet (18) are brought into press-contact with each other through cam protrusions (19a and 19b) as illustrated in FIG. 38 and FIG. 39. More specifically, in the optical transceiver (13) as the existing electronic device, the soft heat conductive sheet (18) is stuck to one of a contact surface of a heat sink (15) disposed above a cage (12) installed on a host substrate (11) and a contact surface of a transceiver housing (14). The heat sink (15) is supported by the cage (12) so as to be movable elastically downward within a predetermined range, and cam protrusions (19) are provided on the contact surface (14a) of the transceiver housing (14) so as to separate the contact surface (15a) of the heat sink (15) within a predetermined range. Further, Japanese Patent Laid-Open No. 2009-152428 discloses that the transceiver housing (14) is inserted into the cage (12) without rubbing a contact surface of the heat conductive sheet (18), and the contact surface of the heat sink (15) and the contact surface of the transceiver housing (14) are brought into press-contact with each other with the heat conductive sheet (18) in between at a final insertion position of the transceiver housing (14). Note that reference numerals relating to description of the related art document are distinguished from an embodiment of the present invention by adding parentheses. In the optical transceiver (13) disclosed in Japanese Patent Laid-Open No. 2009-152428, in a case where the cam protrusions (19a and 19b) are in contact with an upper surface of a cam groove (20d) as illustrated in FIG. 39(E) illustrating a pressure contact state, there is an issue that stable pressure contact over the entire surface of the heat conductive sheet (18) is difficult. As countermeasures for avoiding the issue, a clearance may be provided such that the cam protrusions (19a and 19b) are not in contact with the upper surface of the cam groove (20d) in the pressure contact state illustrated in FIG. 39(E). However, when an inclined surface is provided on any of an inclination surface (20c) and the cam protrusion (19b), an issue that the transceiver housing (14) and the heat conductive sheet (18) slide on and rub each other immediately before the final insertion position of the optical transceiver (13) remains. Therefore, an object of the present invention is to provide an electronic device having a structure in which a heat sink (a heat conductive sheet in the case where the heat conductive sheet is attached) can be stably pressed against a plug shell serving as a heat generation body over an entire surface without sliding on the plug shell. SUMMARY OF THE INVENTION An electronic device according to an aspect of the present invention includes: a plug connector including a plug shell and a plug housing; a receptacle housing including an opening into/from which the plug connector is insertable/extractable; and a heat sink movably installed on the receptacle housing by being installed through a receptacle shell attached to the receptacle housing. When the plug connector is inserted into the opening of the receptacle housing and a fitted state is established, the plug shell and a heat releasing surface of the heat sink come into contact with each other, and the heat sink dissipates heat generated from the plug connector. When an insertion/extraction direction of the plug connector into/from the opening of the receptacle housing is defined as a first direction, the extraction direction of the plug connector from the opening is defined as a positive first direction, the insertion direction is defined as a negative first direction, a direction orthogonal to the first direction is defined as a second direction, a direction in which the plug shell and the heat releasing surface of the heat sink are separated from each other is defined as a positive second direction, and a direction in which the plug shell and the heat releasing surface of the heat sink come close to each other is defined as a negative second direction, the heat sink is supported to be movable in