Optical Transceiver

Abstract

To provide an optical transceiver that can be easily assembled.SOLUTION: An optical transceiver 1 includes: groove-shaped housing parts 110, 210; a case capable of being inserted into and removed from a cage; a movable member 95 to be attached to the case; and curved leaf spring members 150, 250 respectively housed in the housing parts 110, 210. Each of the housing parts 110, 210 includes a first surface, a second surface, and a third surface connecting the first surface and the second surface. The first surface is away from the second surface in a direction where the case is longitudinally inserted into the cage. The movable member 95 has protrusions respectively protruding into the housing parts 110, 210. Each of the spring members 150, 250 includes: a first pressing part that presses the protrusion toward the first surface; a second pressing part that presses the second surface in a direction where it longitudinally moves away from the first surface; and a connection part that is curved to connect the first pressing part and the second pressing part, and that is in contact with the third surface. An end on the side of the first pressing part of each of the spring members 150, 250 is curved so as to be away from the first surface.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to optical transceivers. [Background technology]

[0002] An optical transceiver has been disclosed that includes a spring between the housing and the pull tab for returning the pull tab to its initial position (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2018-508046 Summary of the Invention [Problem to be solved by the invention]

[0004] When an optical transceiver capable of hot swapping into and out of a cage of a host system is inserted into the cage, it engages with the cage. When the optical transceiver is engaged with the cage, the pull tab exposed from the cage is in an initial position, and the optical transceiver cannot be removed from the cage. By pulling the pull tab from the initial position in the direction opposite to the insertion direction, the engagement with the cage is released, and the optical transceiver can be removed from the cage. A preload is applied to the spring so that the pull tab is maintained in the initial position except when the optical transceiver is removed from the cage. In other words, even when the pull tab is in the initial position, the spring is in a deformed state from its natural state. For this reason, in the past, when assembling an optical transceiver, the spring is attached between the housing and the pull tab while receiving a reaction force due to the deformation of the spring. If the spring is deformed excessively during installation, the spring may sag. In addition, in order to miniaturize an optical transceiver, a small spring needs to be attached in a narrow space. For example, a small spring that is too small to be handled by bare hands needs to be appropriately deformed and accommodated in a narrow space. Therefore, the assembly process for the conventional optical transceiver is complicated, especially when a compression coil spring is used.

[0005] An object of the present disclosure is to provide an optical transceiver that can be easily assembled. [Means for solving the problem]

[0006] According to one aspect of the present embodiment, the optical transceiver has a rectangular parallelepiped shape extending in a longitudinal direction, Each other The longitudinal direction A first side wall portion and a second side wall portion aligned in a short direction intersecting with a housing that can be inserted into and removed from a cage of an external device in the longitudinal direction; a movable member that is attached to the housing in a state in which the movable member can move within a predetermined distance in the longitudinal direction relative to the housing; The first A spring member, the first side wall portion includes a groove-shaped first housing portion extending in the longitudinal direction and housing the first spring member; The above No. 1 The housing portion has a first surface and a second surface spaced apart from each other in the longitudinal direction, No. 1 Forming the bottom of the container; Curved a third surface connecting the first surface and the second surface; and A U-shaped first inner surface having The first surface is spaced from the second surface in the longitudinal direction in a direction in which the housing is inserted into the cage, and the movable member is No. 1 Protruding into the housing No. 1 The projection is provided. No. 1 The spring member is No. 1 a first pressing portion that presses the protruding portion toward the first surface, a second pressing portion that presses the second surface in a direction away from the first surface in the longitudinal direction, and a curved portion that connects the first pressing portion and the second pressing portion and contacts the third surface. No. 1 A connecting portion, No. 1 An end of the spring member on the side of the first pressing portion is curved so as to move away from the first surface in the longitudinal direction as the end becomes farther away from the first pressing portion. Effect of the Invention

[0007] According to the present disclosure, an optical transceiver can be easily assembled. [Brief description of the drawings]

[0008] [Figure 1]FIG. 1 is a perspective view showing an optical transceiver according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view showing the optical transceiver according to the embodiment. [Diagram 3] FIG. 3 is a cross-sectional view showing the first housing portion. [Figure 4] FIG. 4 is a perspective cross-sectional view showing the first housing portion and the second housing portion. [Diagram 5] FIG. 5 is a perspective view showing a leaf spring. [Figure 6] FIG. 6 is a perspective view showing the first housing portion and the leaf spring. [Figure 7] FIG. 7 is a perspective view showing the slider. [Figure 8] FIG. 8 is a cross-sectional view showing the upper housing, the slider, the first housing portion, and the leaf spring. [Figure 9] FIG. 9 is a cross-sectional view showing the leaf spring when the pull tab is pulled forward. [Figure 10] FIG. 10 is a perspective view (part 1) illustrating a method for assembling the optical transceiver according to the embodiment. [Figure 11] FIG. 11 is a second perspective view illustrating a method for assembling the optical transceiver according to the embodiment. [Figure 12] FIG. 12 is a third perspective view illustrating a method for assembling the optical transceiver according to the embodiment. [Figure 13] FIG. 13 is a fourth perspective view illustrating a method for assembling the optical transceiver according to the embodiment. [Figure 14] FIG. 14 is a first cross-sectional view illustrating a method for assembling an optical transceiver according to an embodiment. [Figure 15] FIG. 15 is a second cross-sectional view illustrating a method for assembling the optical transceiver according to the embodiment. [Figure 16] FIG. 16 is a third cross-sectional view illustrating a method for assembling the optical transceiver according to the embodiment. [Figure 17] FIG. 17 is a cross-sectional view showing an example of a protrusion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The embodiments for carrying out the invention are described below.

[0010] [Description of the embodiments of the present disclosure] First, the embodiments of the present disclosure will be described. In the following description, the same or corresponding elements are denoted by the same reference numerals, and the same description thereof will not be repeated.

[0011] [1] An optical transceiver according to one aspect of the present disclosure includes a housing having a rectangular parallelepiped shape extending in a longitudinal direction, a groove-shaped accommodating portion extending in the longitudinal direction, and capable of being inserted into and removed from a cage of an external device in the longitudinal direction, a movable member attached to the housing in a state in which the movable member is movable within a predetermined distance in the longitudinal direction relative to the housing, and a spring member having a curved plate shape and accommodated in the accommodating portion, the accommodating portion having a first surface and a second surface spaced apart from each other in the longitudinal direction, and a third surface forming a bottom of the accommodating portion and connecting the first surface and the second surface, the first surface being a first surface extending in the longitudinal direction, the second surface being a second surface extending in the longitudinal direction, the third surface being a second surface extending in the longitudinal direction, the third surface being a second surface extending in the longitudinal direction, the third surface being a second surface extending in the longitudinal direction, the third surface being a second surface extending in the longitudinal direction, the fourth ... the housing is spaced from the second surface in the longitudinal direction in a direction for inserting the housing into the cage, the movable member has a protruding portion that protrudes into the accommodating portion, the spring member has a first pressing portion that presses the protruding portion toward the first surface, a second pressing portion that presses the second surface in a direction away from the first surface in the longitudinal direction, and a connecting portion that curves to connect the first pressing portion and the second pressing portion and contacts the third surface, and the end of the spring member on the first pressing portion side is curved so as to move away from the first surface in the longitudinal direction the more it moves away from the first pressing portion.

[0012] The spring member has a first pressing portion, a second pressing portion, and a connecting portion, and the connecting portion contacts the third surface forming the bottom of the housing portion. Therefore, when assembling the optical transceiver, if the spring member is inserted into the housing portion so that the connecting portion contacts the third surface, the first pressing portion contacts the first surface and the second pressing portion contacts the second surface without applying a load from the outside to the first pressing portion and the second pressing portion, and a preload is applied to the spring member. In addition, the end of the spring member on the first pressing portion side is curved so that the further it is from the first pressing portion, the further it is from the first surface in the longitudinal direction. Therefore, the protruding portion of the movable member can be easily inserted between the first pressing portion and the first surface. In this way, the spring member and the movable member can be attached to the housing by a simple operation.

[0013] [2] In the item [1], when the spring member is housed in the housing, the connecting portion can bias the first pressing portion and the second pressing portion in directions away from each other. In this case, after the optical transceiver is removed from the cage, it is easy to return the movable member to its position before removal.

[0014] [3] In [1] or [2], the connecting portion may have a flat plate portion connected to the first pressing portion, and the end portion of the spring member on the first pressing portion side may be curved toward the second pressing portion at an angle of 50° to 70° with respect to the flat plate portion. In this case, it is easy to insert the protrusion between the end portion of the spring member and the first surface.

[0015] [4] In any one of [1] to [3], the spring member may have a first slit extending from the first pressing portion toward the third surface and a second slit extending from the second pressing portion toward the third surface, the width of the first slit being wider as it approaches the first pressing portion from the connecting portion, and the width of the second slit being wider as it approaches the second pressing portion from the connecting portion. In this case, the uniformity of the stress acting on the connecting portion is improved, and deterioration of the spring member due to stress concentration is easily suppressed.

[0016] [5] In [4], the housing portion may have a limiting portion that protrudes from the second surface toward the first surface and passes through the second slit to limit a range of movement of the spring member. In this case, the limiting portion limits a range of movement, such as rotation, of the spring member, making it easier to prevent the spring member from coming out of the housing portion.

[0017] [6] In any of [1] to [5], the housing portion may have a fourth surface connected to an end of the first surface opposite to the third surface, and the fourth surface may be inclined so as to move away from the second surface in the longitudinal direction as it moves away from the end of the first surface. In this case, it is easy to insert the protruding portion between the end of the spring member and the first surface.

[0018] [7] In any of [1] to [6], the protruding portion may have a fifth surface with which the first pressing portion comes into contact and a sixth surface opposite the third surface, and a chamfer may be applied to a portion where the fifth surface and the sixth surface intersect. In this case, the protruding portion may be easily inserted between the end of the spring member and the first surface.

[0019] [8] In any of [1] to [7], the connecting portion may be curved with a first radius of curvature at a portion contacting the third surface, and the third surface may have a curved surface, within a range where the connecting portion is in contact, that is curved with a second radius of curvature larger than the first radius of curvature. In this case, it is possible to restrict rotation of the spring member while allowing deformation of the spring member accompanying movement of the movable member.

[0020] [9] In any of [1] to [8], the movable member may have a pair of plates attached to the housing so as to sandwich the housing in a short-side direction of the housing that intersects with the long-side direction. In this case, it is possible to distribute a load acting on the movable member when the optical transceiver is pulled out of the cage.

[0021]

[10] In the item [9], a bridge portion may be provided connecting the pair of plates. In this case, it is possible to suppress bias in the load between the two plates.

[0022] [Embodiments of the present disclosure] An embodiment of the present disclosure relates to an optical transceiver that can be inserted into or removed from a cage of a host system (optical transmission device), for example. FIG. 1 is a perspective view showing an optical transceiver according to an embodiment. FIG. 2 is an exploded perspective view showing an optical transceiver according to an embodiment. In each figure, an XYZ orthogonal coordinate system is set for ease of explanation. For example, the direction in which the optical transceiver can be inserted into or removed from the cage is the X-axis direction. Also, the Y-axis direction is, for example, the direction in which two optical receptacles, which will be described later, are aligned. In the present disclosure, a planar shape refers to a shape when viewed from the Z-axis direction.

[0023] As shown in FIG. 1, the optical transceiver 1 according to the embodiment includes a housing 91, a slider 95, and a pull tab 96.

[0024] The housing 91 has a planar shape having a longitudinal direction and a lateral direction. The housing 91 has a generally rectangular parallelepiped shape that is long in the longitudinal direction. In this embodiment, the longitudinal direction is along the X-axis direction, and the lateral direction is along the Y-axis direction. The longitudinal direction is, for example, the direction in which the optical transceiver 1 is inserted into and removed from the cage. The lateral direction is a direction intersecting with the longitudinal direction. The housing 91 has, for example, a lower housing 91A and an upper housing 91B. The lower housing 91A and the upper housing 91B are disposed opposite to each other in the height direction. The height direction is along the Z-axis direction. The height direction is a direction intersecting with the longitudinal direction and the lateral direction. The lower housing 91A has an internal space for accommodating components therein. The internal space opens to the +Z side. The upper housing 91B is fixed to the lower housing 91A so as to cover and close the opening of the lower housing 91A. The lower housing 91A and the upper housing 91B are made of, for example, metal.

[0025] An optical receptacle 92T for transmission and an optical receptacle 92R for reception are provided at one end (-X end) in the X-axis direction of the lower housing 91A. The housing 91 can be inserted into the +X side of a cage of a host system. The housing 91 can be removed from the cage to the -X side by holding a pull tab 96, which will be described later. The optical receptacles 92T and 92R are, for example, LC-type receptacles. For example, the optical receptacle 92T is provided on the +Y side of the optical receptacle 92R. The optical receptacle 92T and the optical receptacle 92R are provided side by side in the Y-axis direction. The optical transceiver 1 transmits an optical signal via an optical fiber connected to the optical receptacle 92T, and receives an optical signal via another optical fiber connected to the optical receptacle 92R. Optical receptacle 92T and optical receptacle 92R are not contained within the cage when housing 91 is inserted into the cage, but face the outside of the host system and are connectable to optical connectors provided at the ends of optical fibers. In the following description, in the X-axis direction, the side of lower housing 91A on which optical receptacles 92T and 92R are provided (-X side) may be referred to as the front side, and the opposite side (+X side) may be referred to as the rear side.

[0026] Lower housing 91A has first side wall 100 and second side wall 200 aligned in the short side direction of housing 91. Second side wall 200 is provided on the +Y side of first side wall 100. First side wall 100 constitutes a part of optical receptacle 92R, and second side wall 200 constitutes a part of optical receptacle 92T. Lower housing 91A has bottom wall 300 connecting the -Z side ends of first side wall 100 and second side wall 200. Bottom wall 300 constitutes a part of optical receptacles 92R and 92T. First side wall 100 is formed with groove-shaped first accommodating portion 110 extending in the X-axis direction, and second side wall 200 is formed with groove-shaped second accommodating portion 210 extending in the X-axis direction. The first accommodating portion 110 accommodates a leaf spring 150, which will be described later, and the second accommodating portion 210 accommodates a leaf spring 250, which will be described later.

[0027] Incidentally, housing 91 has a shape that is approximately plane-symmetrical with respect to the ZX plane that passes through the center of housing 91 in the Y-axis direction. For example, first side wall portion 100 is plane-symmetrical with second side wall portion 200. For example, first accommodating portion is plane-symmetrical with second accommodating portion 210. For example, optical receptacle 92R is plane-symmetrical with optical receptacle 92T. For this reason, a description of one side may also serve as a description of the other side. The same applies to leaf springs 150, 250, slider 95, etc.

[0028] Here, a description will be given of the first accommodating section 110 and the second accommodating section 210. Fig. 3 is a cross-sectional view showing the first accommodating section 110. Fig. 4 is a perspective cross-sectional view showing the first accommodating section 110 and the second accommodating section 210.

[0029] The first housing portion 110 is provided on the outer surface of the first side wall portion 100 so as to open to the +Z side. The first housing portion 110 has a first surface 111 and a second surface 112 spaced apart from each other in the X-axis direction, and a third surface 113 connecting the first surface 111 and the second surface 112. The third surface 113 forms the bottom of a groove. For example, the first surface 111, the second surface 112, and the third surface 113 form a U-shaped inner surface that opens in the +Z direction. The first surface 111 is provided on the rear side (+X side) of the second surface 112. That is, the first surface 111 is located away from the second surface 112 in the X-axis direction (longitudinal direction of the housing 91) in a direction of insertion into the cage. For example, the first surface 111 and the second surface 112 are each perpendicular to the X-axis direction. For example, third surface 113 includes curved surface 113C curved with a second radius of curvature, plane 113A connecting curved surface 113C and first surface 111, and plane 113B connecting curved surface 113C and second surface 112.

[0030] The first storage section 110 has a first wall surface 121 and a second wall surface 122 spaced apart from each other in the Y-axis direction. The first wall surface 121 is provided on the +Y side of the second wall surface 122. For example, the first wall surface 121 and the second wall surface 122 are surfaces perpendicular to the Y-axis direction. The first wall surface 121 and the second wall surface 122 are connected to the first surface 111, the second surface 112, and the third surface 113. The dimension of the second wall surface 122 in the Z-axis direction is smaller than the dimension of the first wall surface 121 in the Z-axis direction. For example, the boundary between the flat surface 113A and the curved surface 113C and the boundary between the flat surface 113B and the curved surface 113C are located on the -Z side of the end of the second wall surface 122 on the +Z side.

[0031] The first accommodating portion 110 has a limiting portion 130 that protrudes from the second surface 112 toward the first surface 111 and limits the movement range of the leaf spring 150. The limiting portion 130 may protrude toward the first surface 111 from the second surface 112 and the flat surface 113B.

[0032] Lower housing 91A has upper surface 140 on the +Z side, and a portion where first surface 111 and upper surface 140 intersect is chamfered to form fourth surface 114. Thus, fourth surface 114 is connected to an end of first surface 111 opposite third surface 113. Fourth surface 114 is inclined so as to move away from second surface 112 in the X-axis direction as it approaches upper surface 140 in the Z-axis direction, i.e., as it moves away from the end of first surface 111. The chamfer of fourth surface 114 is, for example, a C-chamfer, but may also be an R-chamfer.

[0033] For example, the distance between first surface 111 and second surface 112 in the X-axis direction is about 7 mm to 9 mm. The distance between first wall surface 121 and second wall surface 122 is about 2 mm to 3 mm. The depth of first accommodating portion 110 based on top surface 140 is about 7 mm to 9 mm. The second radius of curvature is about 3.0 mm.

[0034] Next, the leaf spring 150 will be described. Fig. 5 is a perspective view showing the leaf spring 150. Fig. 6 is a perspective view showing the first housing portion 110 and the leaf spring 150. The leaf spring 150 is an example of a spring member.

[0035] The leaf spring 150 is formed by, for example, bending a metal plate in one direction. The thickness of the leaf spring 150 is about 0.2 mm to 0.3 mm. As shown in FIG. 6, the leaf spring 150 is accommodated in the first accommodation portion 110. The leaf spring 150 has a first pressing portion 151, a second pressing portion 152, and a connecting portion 153 that connects the first pressing portion 151 and the second pressing portion 152 and contacts the third surface 113. The first pressing portion 151 presses a protruding portion 170 described below toward the first surface 111. The second pressing portion 152 presses the second surface 112 in a direction away from the first surface 111 in the X-axis direction, that is, toward the -X side. The leaf spring 150 is made of a metal such as stainless steel or phosphor bronze. The leaf spring 150 is housed in the first housing portion 110, and the connecting portion 153 urges the first pressing portion 151 and the second pressing portion 152 in a direction separating them from each other in the X-axis direction.

[0036] For example, the connecting portion 153 has a curved portion 153C curved with a first radius of curvature, and a flat portion 153A and a flat portion 153B connected to both ends of the curved portion 153C. The flat portion 153A connects the curved portion 153C to the first pressing portion 151. The flat portion 153B connects the curved portion 153C to the second pressing portion 152. The first radius of curvature is, for example, about 2.8 mm, and the second radius of curvature (about 3.0 mm) is larger than the first radius of curvature. In addition, the end portion 154 of the leaf spring 150 on the first pressing portion 151 side is curved toward the second pressing portion 152. That is, the end portion 154 is curved so as to be separated from the first surface 111 in the X-axis direction as it is separated from the first pressing portion 151. The end 154 is curved at an angle of, for example, 50° to 70°, for example, about 60°, with respect to the flat plate portion 153A. The angle of curvature is preferably 55° to 65°. The end 155 on the second pressing portion 152 side of the leaf spring 150 may be curved toward the first pressing portion 151. That is, the end 155 may be curved so that it is further away from the second surface 112 in the X-axis direction as it is further away from the second pressing portion 152. The end 155 may be curved at an angle of, for example, 50° to 70°, for example, about 60°, with respect to the flat plate portion 153B. The flat plate portions 153A and 153B may be flat in a natural state, and may be slightly curved when housed in the first housing portion 110. Here, the natural state refers to, for example, a state in which the leaf spring 150 is not housed in the first housing portion and is not deformed by receiving an external force.

[0037] The leaf spring 150 is formed with a first slit 156 extending from the first pressing portion 151 toward the apex 153D of the curved portion 153C, and a second slit 157 extending from the second pressing portion 152 toward the apex 153D of the curved portion 153C. For example, the first slit 156 is formed from the flat portion 153A to the curved portion 153C, and the second slit 157 is formed from the flat portion 153B to the curved portion 153C. When the leaf spring 150 is accommodated in the first accommodating portion 110, the first slit 156 extends from the first pressing portion 151 toward the third surface 113, and the second slit 157 extends from the second pressing portion 152 toward the third surface 113.

[0038] For example, the width (dimension in the Y-axis direction) of the leaf spring 150 is about 2 mm to 3 mm, and is uniform from the end 154 through the connecting portion 153 to the end 155. The width of the first slit 156 is not uniform, but is wider from the connecting portion 153 to the first pressing portion 151. Therefore, the sum of the widths of the two portions of the leaf spring 150 sandwiching the first slit 156 in the Y-axis direction is smaller as it approaches the first pressing portion 151. Similarly, the width of the second slit 157 is not uniform, but is wider from the connecting portion 153 to the second pressing portion 152. Therefore, the sum of the widths of the two portions of the leaf spring 150 sandwiching the second slit 157 in the Y-axis direction is smaller as it approaches the second pressing portion 152.

[0039] When the leaf spring 150 is in its natural state, the angle between the flat plate portion 153A and the flat plate portion 153B is, for example, about 30°. The maximum dimension of the leaf spring 150 in the X-axis direction in the natural state is about 8.0 mm, which is greater than the distance (about 7.8 mm) between the first surface 111 and the second surface 112. Therefore, the leaf spring 150 accommodated in the first accommodation portion 110 is compressed in the X-axis direction, and the connecting portion 153 constantly biases the first pressing portion 151 and the second pressing portion 152 in a direction separating them from each other. When the leaf spring 150 is accommodated in the first accommodation portion 110, the first pressing portion 151 and the second pressing portion 152 are deformed so that they approach each other more than in the natural state, and a preload is applied.

[0040] As shown in Fig. 6, the leaf spring 150 is accommodated in the first accommodation section 110 such that the first pressing section 151 faces the first surface 111, the second pressing section 152 faces the second surface 112, and the top 153D of the curved section 153C contacts the third surface 113. The first wall surface 121 and the second wall surface 122 limit movement in the Y-axis direction near the curved section 153C. In addition, the limiting section 130 of the first accommodation section 110 passes through the second slit 157. The limiting section 130 limits the range in which the leaf spring 150 can rotate in the ZX plane, and limits movement in the Y-axis direction near the flat plate section 153B.

[0041] Next, the configuration of the slider 95 will be described. The slider 95 is attached to the lower housing 91A so as to be slidable in the X-axis direction. The pull tab 96 is fixed to the slider 95. The slider 95 is made of, for example, metal. The slider 95 is formed, for example, by curving a metal plate. The slider 95 is formed, for example, by sheet metal processing. The thickness of the metal plate of the slider 95 is, for example, about 0.5 mm. The pull tab 96 is made of, for example, resin. FIG. 7 is a perspective view showing the slider 95. FIG. 8 is a cross-sectional view showing the upper housing 91B, the slider 95, the first housing portion 110, and the leaf spring 150. Note that FIG. 8 shows only a part of the slider 95 (the connecting plate 94 and the protruding portion 170 described later).

[0042] As shown in FIG. 7, the slider 95 has a pair of side plates 160, 260 and a connecting plate 94 connecting the side plates 160, 260. The side plates 160, 260 are located in the out-of-plane direction of the outer surfaces of the first side wall portion 100 and the second side wall portion 200 of the lower housing 91A, respectively, and are movable in the X-axis direction along these outer surfaces. A protrusion 161 extending to the -Y side is formed at the end of the rear side (+X side) of the side plate 160, and a protrusion 261 extending to the +Y side is formed at the end of the rear side (+X side) of the side plate 260. When the pull tab 96 is pulled in the -X direction, the protrusions 161, 261 can move in the -X direction to push out an engagement piece (not shown) of the cage to the outside. The engagement piece is provided on the side surface of the cage and is bent inwardly of the cage. When the optical transceiver 1 is inserted into a cage (not shown) of a host system, the engagement piece comes into contact with the housing 91 and is engaged. In the engaged state, the housing 91 cannot be pulled out of the cage. Pulling the pull tab 96 in the -X direction moves the slider 95, and the protrusions 161, 261 each push the engagement pieces of the cage outward, thereby releasing the engagement state. Once the engagement state is released, the optical transceiver 1 can be removed from the cage. The slider 95 is an example of a movable member. The side plates 160, 260 are an example of plate material. The connecting plate 94 is an example of a bridge portion. The slider 95 may be formed, for example, by sheet metal processing from a single metal plate.

[0043] A pair of protruding portions 170, 270 are provided protruding to the -Z side from the +X side surface of the connecting plate 94. As shown in Fig. 8, the protruding portion 170 protrudes into the first accommodating portion 110, and has a fifth surface 175 in contact with the first pressing portion 151, a sixth surface 176 facing the third surface 113, and a seventh surface 177 in contact with the first surface 111.

[0044] The upper housing 91B is fixed to the lower housing 91A by using a screw 93 (see FIG. 2). The upper housing 91B has a protrusion 97 adjacent to the end 155 of the leaf spring 150 on the second pressing portion 152 side. The protrusion 97 protrudes from the upper housing 91B toward the lower housing 91A (in the -Z direction). The lower surface of the connecting plate 94 is adjacent to the end 154 of the leaf spring 150 on the first pressing portion 151 side. The lower surface of the connecting plate 94 is, for example, a surface parallel to the XY plane. Therefore, in addition to the limiting portion 130, the protrusion 97 and the connecting plate 94 also limit the range in which the leaf spring 150 can rotate in the ZX plane. Furthermore, the movement of the leaf spring 150 in the +Z direction is limited so that the leaf spring 150 does not jump out of the first housing portion 110.

[0045] Next, a description will be given of the components housed in the housing 91. As shown in Fig. 2, the housing 91 houses a transmitter optical sub-assembly (TOSA) 11 and a receiver optical sub-assembly (ROSA) 12. The housing 91 further houses a wiring board 20, flexible print circuit boards (FPC) 31 and 32, and a digital signal processor (DSP) 40.

[0046] TOSA 11 and wiring board 20 are connected via FPC 31, and ROSA 12 and wiring board 20 are connected via FPC 32. DSP 40 is mounted on the upper surface of wiring board 20. DSP 40 processes electrical signals related to photoelectric conversion performed by TOSA 11 and ROSA 12 via wiring formed on wiring board 20 and FPCs 31 and 32.

[0047] Terminal groups 23 including a plurality of external terminals are provided on the rear end of the upper and lower surfaces of wiring board 20. When optical transceiver 1 is inserted into a cage of a host system, these terminal groups 23 are connected to a plurality of terminals provided on the cage. For example, terminal group 23 forms an electric plug and fits into an electric socket consisting of a plurality of terminals provided on the cage. When fitted, a predetermined terminal of terminal group 23 is electrically connected one-to-one with a predetermined terminal of the plurality of terminals provided on the cage. Power required for operation of optical transceiver 1 is supplied from the host system via terminal group 23, and electrical signals are transmitted and received between the host system and optical transceiver 1.

[0048] Here, a description will be given of the function of the slider 95. Figure 9 is a cross-sectional view showing the leaf spring 150 when the pull tab 96 is pulled forward (to the -X side).

[0049] When the pull tab 96 is pulled forward (-X side), the slider 95 connected to the pull tab 96 moves toward the -X side relative to the housing 91. As a result, the protrusion 161 slides on the outer surface of the first side wall 100 and pushes an engagement piece (not shown) of the cage toward the -Y side, and the cage of the host system and the housing 91 are disengaged. At this time, the protrusion 261 also slides on the outer surface of the first side wall 100 and pushes another engagement piece (not shown) of the cage toward the +Y side. In this way, by pulling the pull tab 96 forward (-X side), the slider 95 slides and the engagement is released, and the optical transceiver 1 inserted in the cage of the host system can be removed from the cage.

[0050] Then, because second pressing portion 152 presses second surface 112 and first pressing portion 151 presses protruding portion 170 toward first surface 111, when the tension on pull tab 96 is released, slider 95 moves toward the +X side relative to housing 91 and returns to the state shown in Fig. 8. That is, leaf spring 150 is deformed by the movement of protruding portion 170 in the -X direction, and protruding portion 170 is pushed back in the +X direction by the reaction force generated by the deformation, returning pull tab 96 to its initial position. When pull tab 96 is in the initial position, the cage of the host system and housing 91 are engaged, and housing 91 cannot be removed from the cage.

[0051] 7, the +X side ends of side plates 160, 260 are bent so that protrusions 161, 261 do not push out the engagement pieces of the cage when pull tab 96 is not pulled forward (-X side). For example, protrusion 161 is bent toward the +Y direction more than side plate 160, and protrusion 261 is bent toward the -Y direction more than side plate 260.

[0052] Next, a method of assembling the optical transceiver 1 will be described. Figures 10 to 13 are perspective views showing a method of assembling the optical transceiver 1 according to the embodiment. Figures 14 to 16 are cross-sectional views showing a method of assembling the optical transceiver 1 according to the embodiment.

[0053] First, as shown in FIG. 10, the DSP 40 is mounted on the wiring board 20, the TOSA 11 is connected to the wiring board 20 via the FPC 31, and the ROSA 12 is connected to the wiring board 20 via the FPC 32. For example, the DSP 40 may be surface-mounted on the wiring board 20 together with other circuit components by solder reflow. The FPCs 31 and 32 may be connected, for example, by connecting terminals at both ends of the FPCs 31 and 32 to terminals provided on the wiring board 20 and terminals provided on the TOSA 11 or ROSA 12 by soldering. Next, the opening of the lower housing 91A faces the +Z side, and the TOSA 11, ROSA 12, and wiring board 20 are moved from the +Z side to the -Z side of the lower housing 91A and accommodated in the internal space of the lower housing 91A. For example, in the X-axis direction, the TOSA 11 and ROSA 12 are disposed between the optical receptacles 92R and 92T and the wiring board 20.

[0054] 11, the opening of the first housing portion 110 and the opening of the second housing portion 210 are oriented toward the +Z side, and the leaf springs 150 and 250 are moved from the +Z side to the -Z side of the lower housing 91A to be housed in the first housing portion 110 and the second housing portion 210, respectively. As described above, the maximum dimension of the leaf spring 150 in the X-axis direction in the natural state (initial state) is greater than the distance between the first surface 111 and the second surface 112. Therefore, when the leaf spring 150 is moved to the -Z side, as shown in FIG. 14, the first pressing portion 151 contacts the first surface 111, and the second pressing portion 152 contacts the second surface 112, while the leaf spring 150 is compressed in the X-axis direction and housed in the first housing portion 110. In this way, the leaf spring 150 can be accommodated in the first accommodation portion 110 in a preloaded state without applying an external load in the X-axis direction to the leaf spring 150. Furthermore, since the limiting portion 130 penetrates the second slit 157 and the top portion 153D of the leaf spring 150 contacts the curved surface 113C of the third surface 113, the range in which the leaf spring 150 can rotate in the ZX plane is limited, and the leaf spring 150 can be prevented from coming off the first accommodation portion 110 due to the preload (reaction force).

[0055] Next, as shown in FIG. 12, the slider 95 and the pull tab 96 are integrated, and are attached to the lower housing 91A by moving them from the +Z side to the -Z side of the lower housing 91A. At this time, the protrusion 170 is aligned in the X-axis direction so as to contact the outer surface of the end portion 154 or the fourth surface 114. When the slider 95 is moved to the -Z side after this alignment, the protrusion 170 moves into the first housing portion 110 along the fourth surface 114 as shown in FIG. 15. Also, the fifth surface 175 comes into contact with the first pressing portion 151, moving the first pressing portion 151 to the -X side. As a result, as shown in FIG. 16, the protrusion 170 is inserted between the first pressing portion 151 and the first surface 111 and enters the first housing portion 110, and the seventh surface 177 comes into contact with the first surface 111, stabilizing the state.

[0056] Next, as shown in FIG. 13, upper housing 91B is moved from the +Z side to the -Z side of lower housing 91A and placed on top of lower housing 91A, and screw 93 is moved from the +Z side to the -Z side of lower housing 91A and screwed into a screw hole provided in lower housing 91A to fix upper housing 91B to lower housing 91A.

[0057] In this manner, the optical transceiver 1 according to the embodiment can be assembled.

[0058] When assembling the optical transceiver 1 according to this embodiment, if the leaf spring 150 is inserted into the first housing portion 110 so that the connecting portion 153 contacts the third surface 113, the first pressing portion 151 contacts the first surface 111 and the second pressing portion 152 contacts the second surface 112 without applying a load from the outside to the first pressing portion 151 and the second pressing portion 152, and a preload is applied to the leaf spring 150. In addition, the end portion 154 of the leaf spring 150 on the first pressing portion 151 side is curved so that the further it is from the first pressing portion 151, the further it is from the first surface 111 in the X-axis direction. Therefore, the protruding portion 170 of the slider 95 can be easily inserted between the first pressing portion 151 and the first surface 111. In this way, the leaf spring 150 and the slider 95 can be attached to the housing by a simple operation.

[0059] Furthermore, the movement direction of each part toward the lower housing 91A during assembly can be set to the -Z side. Therefore, when automating the assembly work, it is extremely easy to control a machine such as a robot. Here, each part is, for example, the leaf spring 150, the slider 95, and the upper housing 91B.

[0060] Furthermore, when the leaf spring 150 is accommodated in the first accommodating portion 110, the above-mentioned preload causes the connecting portion 153 to urge the first pressing portion 151 and the second pressing portion 152 in a direction separating them from each other, making it easier to return the slider 95 to the position it was in before removal after removing the optical transceiver 1 from the cage.

[0061] Since end 154 of leaf spring 150 on the first pressing portion 151 side is curved at an angle of 50° or more and 70° or less with respect to flat portion 153A, protrusion 170 can be easily inserted between end 154 and first surface 111.

[0062] Since the first slit 156 and the second slit 157 of an appropriate shape are formed in the connecting portion 153, the variation in the magnitude of the reaction force (stress) of the leaf spring 150 acting on the connecting portion 153 is suppressed, and deterioration of the leaf spring 150 due to stress concentration is easily suppressed.

[0063] Since the fourth surface 114 is formed on the lower housing 91A, by moving the protruding portion 170 along the fourth surface 114, the protruding portion 170 can be easily inserted between the end portion 154 and the first surface 111.

[0064] Since the range where the connecting portion 153 of the third surface 113 of the first accommodating portion 110 contacts includes a curved surface 113C that curves with a second radius of curvature larger than the first radius of curvature of the connecting portion 153, it is possible to limit the rotation of the leaf spring 150 while allowing deformation of the leaf spring 150 in association with the movement of the slider 95.

[0065] Since the slider 95 includes a pair of side plates 160, 260, it is possible to distribute the load acting on the slider 95 from the pull tab 96 when the optical transceiver 1 is pulled out of the cage. In addition, since the pair of side plates 160, 260 are connected by the connecting plate 94, it is possible to prevent the load from being unevenly distributed between the side plates 160, 260.

[0066] As shown in FIG. 17, the portion where the fifth surface 175 and the sixth surface 176 of the protrusion 170 intersect may be chamfered to form an eighth surface 178. When the eighth surface 178 is formed, the end 154 comes into contact with the eighth surface 178, and the protrusion 170 can be easily inserted between the end 154 and the first surface 111. Similarly, the portion where the seventh surface 177 and the sixth surface 176 of the protrusion 170 intersect may be chamfered to form a ninth surface 179. The fourth surface 114 comes into contact with the ninth surface 179, and the protrusion 170 can be easily inserted between the end 154 and the first surface 111. The chamfering of the eighth surface 178 and the ninth surface 179 is, for example, a C-chamfer, but may also be an R-chamfer. FIG. 17 is a cross-sectional view showing an example of the protrusion 170.

[0067] Although the embodiments have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the claims. [Explanation of symbols]

[0068] 1: Optical transceiver 20: Wiring board 23:Terminal group 31, 32: FPC 40:DSP 91: Cabinet 91A: Lower case 91B: Upper case 92R, 92T: Optical receptacle 94: Connecting plate 95: Slider 96: Pull tab 97: Protrusion 100: First side wall portion 110: First storage section 111: 1st page 112:Second side 113:Side 3 113A, 113B: Plane 113C: Curved surface 114:Side 4 121: First wall 122: Second wall 130: Restriction section 140:Top surface 151: First pressing part 152: Second pressing part 153:Connection part 153A, 153B: Flat plate part 153C: Curved section 153D:Top 154, 155: End 156: First slit 157: Second slit 160, 260: Side panels 161, 261: Protrusion 170:Protrusion 175:Side 5 176:Side 6 177:Side 7 178:Side 8 179:Side 9 200: Second side wall 210: Second storage section 270:Protrusion 300: Bottom wall

Claims

1. a housing having a rectangular parallelepiped shape extending in a longitudinal direction, including a first side wall portion and a second side wall portion aligned in a lateral direction intersecting the longitudinal direction, the housing being insertable into and removable from a cage of an external device in the longitudinal direction; a movable member attached to the housing in a state in which the movable member can move within a predetermined distance in the longitudinal direction relative to the housing; A first spring member having a curved plate shape; having The first side wall portion includes a groove-shaped first housing portion that extends in the longitudinal direction and houses the first spring member, The first storage section is a first surface and a second surface spaced apart from each other in the longitudinal direction; a third surface that forms a bottom of the first housing portion and is curved to connect the first surface and the second surface; a first inner surface having a U-shape, the first surface is spaced from the second surface in the longitudinal direction in a direction in which the housing is inserted into the cage; the movable member has a first protruding portion protruding into the first housing portion, The first spring member is a first pressing portion that presses the first protruding portion toward the first surface; a second pressing portion that presses the second surface in a direction away from the first surface in the longitudinal direction; a first connecting portion that is curved to connect the first pressing portion and the second pressing portion and is in contact with the third surface; having an end portion of the first spring member on the first pressing portion side is curved so as to move away from the first surface in the longitudinal direction as the end portion moves away from the first pressing portion;

2. The optical transceiver according to claim 1 , wherein the first connecting portion biases the first pressing portion and the second pressing portion in directions separating them from each other when the first spring member is accommodated in the first accommodation portion.

3. 3. An optical transceiver as described in claim 1 or claim 2, wherein the first connecting portion has a flat plate portion connected to the first pressing portion, and the end portion of the first spring member on the first pressing portion side is curved toward the second pressing portion at an angle of 50° or more and 70° or less with respect to the flat plate portion.

4. The first spring member is a first slit extending from the first pressing portion toward the third surface; a second slit extending from the second pressing portion toward the third surface; having The width of the first slit becomes wider from the first connecting portion to the first pressing portion, The optical transceiver according to claim 1 , wherein a width of the second slit increases from the first connecting portion to the second pressing portion.

5. The optical transceiver according to claim 4 , wherein the first accommodating portion has a limiting portion that protrudes from the second surface toward the first surface and passes through the second slit to limit a range of movement of the first spring member.

6. the first housing portion has a fourth surface connected to an end portion of the first surface opposite to the third surface, The optical transceiver according to claim 1 , wherein the fourth surface is inclined so as to move away from the second surface in the longitudinal direction as the fourth surface moves away from the end of the first surface.

7. The first protrusion is a fifth surface with which the first pressing portion comes into contact; a sixth surface opposite to the third surface; and having 7. The optical transceiver according to claim 1, wherein a portion where the fifth surface and the sixth surface intersect is chamfered.

8. the first connecting portion is curved with a first radius of curvature at a portion contacting the third surface, The optical transceiver according to claim 1 , wherein the third surface has a curved surface that is curved with a second radius of curvature larger than the first radius of curvature within a range where the first connecting portion contacts.

9. 9. The optical transceiver according to claim 1, wherein the movable member comprises a pair of plates attached to the housing so as to sandwich the housing in a short side direction of the housing that intersects with the long side direction.

10. The optical transceiver according to claim 9 , further comprising a bridge portion connecting the pair of plates.

11. A spring having a second spring member having a curved plate-like shape, The second side wall portion includes a groove-shaped second housing portion that extends in the longitudinal direction and houses the second spring member, The second storage section is a seventh surface and an eighth surface spaced apart from each other in the longitudinal direction; a ninth surface that forms a bottom of the second housing portion and is curved to connect the seventh surface and the eighth surface; a second inner surface having a U-shape, the seventh surface is spaced from the eighth surface in the longitudinal direction in a direction in which the housing is inserted into the cage; the movable member has a second protruding portion protruding into the second housing portion, The second spring member is a third pressing portion that presses the second protruding portion toward the seventh surface; a fourth pressing portion that presses the eighth surface in a direction away from the seventh surface in the longitudinal direction; a second connecting portion that is curved to connect the third pressing portion and the fourth pressing portion and is in contact with the ninth surface; having 11. An optical transceiver according to claim 1, wherein an end portion of the second spring member on the third pressing portion side is curved so as to move away from the seventh surface in the longitudinal direction as it moves away from the third pressing portion.

12. An optical transceiver as described in Claim 11, wherein the second accommodating section is symmetrical to the first accommodating section with respect to a plane passing through the center of the short side of the housing.

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