JP2005301114A - Optical connector structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical connector structure capable of mounting an optical element at a predetermined position on a wiring board with an increased positioning accuracy.
An optical connector structure 1 is detachably connected to a predetermined counterpart optical connector, and an optical element 5 that is optically coupled to the counterpart optical connector is mounted on a wiring board 7. Of the opposing surfaces of the element 5 and the wiring substrate 7, a convex portion 5c is formed on one opposing surface, a concave portion 7c is formed on the other opposing surface, and the convex portion 5c and the concave portion 7c are fitted. Thus, the optical element 5 is positioned and mounted at a predetermined position on the wiring board 7.
[Selection] Figure 2

Description

  The present invention relates to the structure of an optical connector used in the field of optical communication such as OA, FA, and in-vehicle equipment, and more particularly to the structure of an optical connector provided with an optical element that is optically coupled to a counterpart optical connector.

  As this type of optical connector, a wiring board, a surface mounting type optical element that is surface-mounted on one main surface of the wiring board, and a mating optical connector are detachably fitted and a wiring board is provided. Some have a housing. In such an optical connector, as shown in FIG. 6, one side main surface of the wiring board 101 is formed flat, and on one side main surface, the optical element 103 is a counterpart optical connector (not shown). And reflow mounting so as to be provided with an optical alignment. The wiring board 101 on which the optical element 102 is mounted is disposed in a housing (not shown) so that optical alignment between the counterpart optical connector and the optical element 102 is provided.

  In the optical connector as described above, one side main surface of the wiring board 102 is formed flat, and the optical element 102 is reflow mounted on the one side main surface. There is a drawback that the optical alignment between the optical element 102 and the counterpart optical connector is shifted due to mounting displacement due to the above. When the optical alignment is deviated in this way, it is necessary to perform alignment work after mounting the optical element, and there is a disadvantage that the alignment work is difficult.

  Further, when the wiring board 101 on which the optical element 102 is mounted is disposed in the housing, a shift occurs between the wiring board 101 and the housing, and the optical alignment between the optical element 102 and the counterpart optical connector is shifted. There are also drawbacks.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide, firstly, an optical connector structure capable of mounting an optical element at a predetermined position on the wiring board with high positioning accuracy, and secondly, a wiring board on which the optical element is mounted. An object of the present invention is to provide an optical connector structure that can be disposed at a predetermined position of a housing with increased positioning accuracy.

  In order to solve the above problems, the invention described in claim 1 is provided with an optical element that is detachably connected to a predetermined counterpart optical connector and optically coupled to the counterpart optical connector mounted on a wiring board. The optical connector has a structure in which one of a convex portion or a concave portion is formed at each of a plurality of locations on the outer peripheral side surface of the optical element, and an element receiving concave portion is formed on the mounting surface of the wiring board. The other of the convex portions or the concave portions is formed at a plurality of corresponding positions on the inner peripheral side surface of the element housing concave portion, and the optical element is one of the convex portions or the concave portions formed at the plurality of positions on the outer peripheral side surface, respectively. Are respectively positioned at predetermined positions in the element receiving recesses by fitting into the other of the protrusions or the recesses respectively formed at the plurality of corresponding positions on the inner peripheral side surface of the element receiving recess. It is intended to be disposed.

  According to a second aspect of the present invention, one of the convex portion or the concave portion is formed on each of the opposing outer surfaces of the optical element, and one of the inner sides of the element accommodating concave portion of the wiring board is opposed to each other. The other of the convex part or the concave part is formed on the side surface, and the optical element is fitted between the one opposing inner side surface of the element accommodating concave part between the one opposing outer side surfaces, One of the convex portion or the concave portion is fitted to the other of the convex portion or the concave portion on the element accommodating concave portion, thereby being positioned and disposed at a predetermined position in the element accommodating concave portion.

  According to a third aspect of the present invention, an electrode portion is disposed on the outer surface of the optical element, and the electrode portion on the optical element side and the reflow connection are provided on the inner surface of the element receiving recess of the wiring board. The electrode portion on the optical element side and the wiring substrate side in a state where the optical element is disposed and the optical element is positioned and disposed at the predetermined position in the element receiving recess of the wiring substrate. The outer surface of the optical element and the inner surface of the wiring board are opposed to each other with a gap so that a gap for reflow connection is secured between the electrode portion and the electrode portion.

  The invention according to claim 4 further includes a housing in which the counterpart optical connector is detachably fitted, and a slit portion is formed in the wiring board, and the fitting portion is fitted into the slit portion in the housing. When the slit portion and the fitting portion are fitted, the wiring board is positioned and disposed at a predetermined position of the housing.

  According to a fifth aspect of the present invention, the slit portion is formed by being cut from an edge side of the wiring board so that a constriction is formed in the wiring board, and the wiring board is accommodated in the housing. A substrate housing recess is formed, and the fitting portion is coupled to one inner surface of each of the opposing inner surfaces of the substrate housing recess in the substrate housing recess, The other end portion is formed in a plate shape facing the other inner side surface of each of the opposing inner side surfaces at a predetermined interval, and the wiring board has the slit portion that is the fitting portion of the substrate housing recess. And the constricted portion is fitted within the predetermined interval between the other inner side surface of the substrate receiving recess and the other end of the fitting portion, thereby the inside of the substrate receiving recess. Positioned at the predetermined position. It is intended to be.

  According to the first aspect of the present invention, the optical element has a plurality of convex portions or concave portions respectively formed at a plurality of locations on the outer side surface, and each of the corresponding ones on the inner side surface of the element receiving concave portion of the wiring board. The optical element is positioned at a predetermined position on the wiring board to increase the positioning accuracy because the optical element is positioned at a predetermined position in the element receiving recess by being fitted to the other of the convex part or the concave part formed at each location. Can be implemented.

  According to the second aspect of the present invention, the optical element is formed on each of the outer surfaces while the one of the outer surfaces of the optical element is fitted between the inner surfaces of the element housing recess. One of the formed convex portions or concave portions is positioned and arranged at a predetermined position in the element accommodating concave portion by fitting with the other convex portion or concave portion formed on each inner side surface on the element accommodating concave portion side. Therefore, even when the optical element and the element receiving recess can be fitted in a positioning manner only in one direction, the optical element is effectively positioned at a predetermined position in the element receiving recess by combining the fitting of the recess and the protruding part. Can be implemented with higher accuracy.

  According to the third aspect of the present invention, in a state where the optical element is positioned and arranged at a predetermined position in the element receiving recess of the wiring board, the electrode portion on the element receiving recess side and the electrode portion on the optical element side are Even when the inner surface of the wiring board and the outer surface of the optical element are opposed to each other with a gap so as to face each other with a gap for reflow connection, the optical element is placed at a predetermined position on the wiring board while satisfying that condition. Can be mounted with higher positioning accuracy.

  According to invention of Claim 4, a slit part is formed in a wiring board, the fitting part fitted to the said slit part is formed in a housing, and the said slit part and the said fitting part fit. Since the wiring board is positioned and arranged at a predetermined position of the housing, the wiring board can be arranged at a predetermined position of the housing with high positioning accuracy.

  According to the fifth aspect of the present invention, the slit portion is formed by being cut from the edge side of the wiring board so that the constricted portion is formed in the wiring board, and the fitting portion is formed in the substrate receiving recess of the housing. The one end portion is coupled to one inner side surface of the opposing inner side surfaces of the substrate receiving recess, and the other end portion is spaced from the other inner side surface of the opposing inner side surfaces by a predetermined distance. The wiring board has a slit portion that fits into the fitting portion of the substrate accommodating recess, and a constricted portion that is connected to the other inner surface of the substrate accommodating recess. By fitting within the predetermined interval between the other end of the fitting portion, the wiring substrate is positioned and arranged at the predetermined position in the substrate receiving recess, so that the wiring board can be housed with a simple structure. Increases the positioning accuracy to the predetermined position Distribution can be set.

  As shown in FIGS. 1 and 2, the optical connector structure 1 according to this embodiment is configured such that a counterpart optical connector 3 holding one or more (here, two) optical fibers 3b is detachably connected. An optical element 5 that is optically coupled to the optical fiber 3b held by the counterpart optical connector 3 is mounted and provided on the wiring board 7. The wiring board 7 and one or more (1 or more) mounted on the wiring board 7 ( Here, the surface mount type optical element 5 and the counterpart optical connector 3 are detachably fitted and connected, and the wiring board 7 is accommodated and distributed. And a housing 9 provided.

  In addition, here, each optical fiber 3b is hold | maintained in the other party optical connector 3 via the ferrule part 3a, for example.

  Each optical element 5 is a light receiving element such as a photodiode or a phototransistor or a light emitting element such as a light emitting diode. Each optical element 5 has an element body 5a formed in a plate shape having a rectangular shape in plan view as shown in FIGS. 2 to 4, for example (in this case, the element body 5a) at a plurality of locations on the outer peripheral side surface of the element body 5a. A positioning convex portion 5c that fits into a concave portion 7c, which will be described later, on the wiring board 7 side is formed on one opposing outer surface 5b of the main body 5a. A light receiving portion or a light emitting portion (hereinafter referred to as a light receiving and emitting portion) 5d is disposed at a predetermined location on one main surface of the element body 5a. Further, on the outer surface of the element body 5a (here, on the other opposing outer surface 5e of the element body 5a and on the front end surface of the convex portion 5c) An electrode portion 5f to be electrically connected is provided.

  The wiring board 7 is formed, for example, in a rectangular plate shape in plan view. On one side main surface (mounting surface) of the wiring board 7, two element accommodating recesses 7 a for accommodating the respective optical elements 5 are formed.

  The dimension of each element receiving recess 7a in plan view is such that, for example, the length of one side (y direction) is substantially the same as the length of the side of the optical element 5 in the same direction, and the other dimension (x direction). The length of the side is formed to be slightly larger than the length of the side of the optical element 5 in the same direction. That is, the element accommodating recess 7a is fitted to the optical element 5 in one side direction (y direction) to position and accommodate the optical element 5, and the optical element 5 in the other side direction (x direction). It is accommodated so that a predetermined gap is formed between the two. In addition, the depth of the element accommodating recess 7a is formed shallower than the thickness of the optical element 5 here, but it may be formed deeper than the thickness of the optical element 5 or formed to be approximately the same as the thickness of the optical element 5. May be.

  Here, one opposing inner side surface 7b of the wiring board 7 is formed in parallel to the x-direction side of the wiring board 7, and the other opposing inner side face 7d of the wiring board 7 Formed in parallel to the side in the y direction.

  At a plurality of locations on the inner peripheral side surface of each element receiving recess 7a (here, for example, at the center on one opposing inner side surface 7b of each element receiving recess 7a), the projection 5c on the optical element 5 side is fitted. A mating recess 7c is formed. Each recess 7 c is open to one side main surface (the upper surface (mounting surface) in FIG. 2) side of the wiring board 7.

  The depth in the concave direction of each concave portion 7 c is formed longer than the length in the convex direction of the convex portion 5 c of the optical element 5. Thereby, when the convex part 5c of the optical element 5 and the concave part 7c of the wiring board 7 are fitted, the electrode part 5f provided on the front end surface of the convex part 5c and the back surface 7e of the concave part 7c are provided. A gap for reflow connection is secured between the electrode portion 7f described later.

  On the inner side surface of each element receiving recess 7a (here, on the other opposing inner side surface 7d of each element receiving recess 7a and on the back surface 7e of each recess 7c), the electrode portion 5f on the optical element 5 side The electrode part 7f electrically connected to is disposed. The electrode portion 7f is connected to a wiring pattern 7g (see FIG. 3) disposed on the wiring board 7.

  Here, the wiring board 7 is configured as a multilayer board (for example, a two-layer board including an upper layer board 7U and a lower layer board 7D) as shown in FIG. The element receiving recess 7a and the recess 7c are formed by cutting out a predetermined region of the upper substrate 7U of the multilayer substrate 7 into the shape of each element receiving recess 7a and each recess 7c. The electrode portion 7f on the wiring board 7 side is connected to a wiring pattern 7g disposed between the upper layer board 7U and the lower layer board 7D, for example.

  The wiring board 7 is formed with a slit portion 7h as shown in FIGS. The slit portion 7h is cut from the edge side of the wiring board 7 so that a constricted portion 7j is formed on the wiring board 7, for example (here, the center of one side (side along the x direction) of the wiring board 7). To the direction perpendicular to the side (y direction) is formed between the two element receiving recesses 7a.

  In order to mount the optical element 5 on the wiring board 7, referring to FIGS. 2 and 3, first, for example, a solder paste (not shown) is applied onto the electrode portion 7 f of the wiring board 7.

  Then, the optical element 5 is placed in the element accommodating recess 7a so that the light emitting / receiving portion 5d faces the front side and each convex portion 5c is fitted in each concave portion 7c of the element accommodating concave portion 7a of the wiring board 7. To accommodate. As a result, (1) one of the opposing outer side surfaces 5b of the optical element 5 is fitted between one opposing inner side surface 7b of the element accommodating recess 7a, and (2) each convex part of the optical element 5 5c fits into each recess 7c of the element receiving recess 7a, and the optical element 5 is positioned and arranged at a predetermined position in the element receiving recess 7a (accordingly, a predetermined position on the wiring board 7). In particular, due to the fitting in (1) above, the position in the y direction on the wiring board 7 in the optical element 5 (the position in the relative direction of one of the inner surfaces 7b facing each other of the element receiving recess 7a) is a predetermined position (as described later) The position in the y direction of the light receiving / emitting part 5d of the optical element 5 and the corresponding position in the y direction of the end face 3c of the optical fiber are positioned. Further, by the fitting in (2) above, the position in the x direction on the wiring board 7 in the optical element 5 (the position in the relative direction of the other opposing inner side surface 7d of the element accommodating recess 7a) is a predetermined position (described later). In this way, the position of the light receiving / emitting portion 5d of the optical element 5 is positioned at a position where the corresponding position of the optical fiber end surface 3c in the x direction matches) and the inner surface 7d of the element receiving recess 7a and the optical element 5 so as to face the outer surface 5e with a predetermined gap, so that the electrode portion 5f on the optical element 5 side and the corresponding electrode portion 7f on the wiring board 7 side face each other with a gap for reflow connection. Positioned. In this way, the optical element 5 is positioned and mounted at a predetermined position on the wiring board 7.

  In this state, the solder paste applied to the electrode part 7f on the wiring board 7 side is melted, and the electrode part 5f on the optical element 5 side and the corresponding electrode part 7f on the wiring board 7 side are soldered to the solder 7i (FIG. 4)). In this way, the optical element 5 is positioned and mounted at a predetermined position on the wiring board 7.

  The housing 9 is formed in a substantially flat cylindrical shape as shown in FIGS. 1 and 5, and a connection cylindrical portion 9 b to which the counterpart optical connector 3 is fitted and connected is formed on one end opening 9 a side thereof. A substrate housing recess 9d for housing the wiring board 7 is formed on the other end opening 9c side.

  The connecting tube portion 9b is formed in a bottomed tube shape into which the counterpart optical connector 3 can be fitted. One or more (here, two in accordance with the number of optical fibers 3b of the counterpart optical connector 3) sleeve portions 9e project from the bottom surface (back surface) of the connecting tube portion 9b. Each sleeve portion 9e is formed in a substantially cylindrical shape having a cylindrical hole 9g into which the corresponding ferrule portion 3a of the counterpart optical connector 3 can be inserted and communicated with the substrate housing recess 9d.

  When the counterpart optical connector 3 is connected to the connection cylinder portion 9b, first, the counterpart optical connector 3 is roughly guided and inserted along the inner peripheral surface of the connection cylinder portion 9b. And when the other party optical connector 3 is inserted in the back, each ferrule part 3a of the other party optical connector 3 follows the inner peripheral surface of the cylindrical hole 9g of the corresponding sleeve part 9e in the connection cylinder part 9b. Inserted with precise guidance. When the counterpart optical connector 3 is inserted into the innermost part of the connection cylinder portion 9b, the end face 3c of each optical fiber 3b of the counterpart optical connector 3 is connected to the substrate receiving recess 9d in the cylindrical hole 9g of the corresponding sleeve portion 9e. In this state, the light receiving / emitting portion 5d of the corresponding optical element 5 on the wiring substrate 7 accommodated and disposed in the substrate accommodating recess 9d as described later is disposed. Thus, the optical coupling of both 3c and 5d is performed.

  Although not shown, for example, one of a locking projection or a locking recess is formed on the inner peripheral surface of the connecting tube portion 9b, and for example, a locking projection is formed on the outer surface of the counterpart optical connector 3. Alternatively, the other of the locking recesses is formed, and when the counterpart optical connector 3 is inserted into the innermost part of the connecting tube portion 9b, the locking projections and the locking recesses of both 3 and 9b are engaged with each other, Thereby, the connection state of both 3 and 9b shall be hold | maintained.

  The size of the opening 9c of the substrate housing recess 9d (that is, the opening of the other end of the housing 9) 9c is slightly larger than the plan view size of the wiring board 7. The depth (depth) of the substrate housing recess 9d is the same as or deeper than the thickness of the wiring substrate 7. On the back surface 9n of the substrate housing recess 9d, there are formed element housing recesses 9f in which the portions 5g (see FIG. 5) protruding from the wiring board 7 in the respective optical elements 5 are respectively housed. And the cylindrical hole 9g of the corresponding sleeve part 9e is connected to the back surface of each element accommodating recessed part 9f, respectively.

  Further, as shown in FIGS. 1 and 5, for example, a plate-like fitting portion 9 h that fits with the slit portion 7 h of the wiring board 7 is formed in the substrate housing recess 9 d. That is, the width (wall thickness) in the x direction of the fitting portion 9h and the width in the x direction (slit width) of the slit portion 7h are formed to have substantially the same dimensions. Here, the fitting portion 9h is erected on the back surface 9n of the substrate housing recess 9d along the vertical direction (y direction) so as to divide the substrate housing recess 9d into left and right, for example. The portion 9i is coupled to the upper inner surface 9j of the substrate housing recess 9d, and the other end 9k is spaced from the lower inner surface 9m of the substrate housing recess 9d by a predetermined distance (the width of the constricted portion 7j of the wiring substrate 7). And the same width). The rear end surface 9p of the fitting portion 9h is formed so as not to protrude from the rear end surface (opening surface) 9q of the substrate housing recess 9d.

  In order to dispose the wiring board 7 in the board housing recess 9d, referring to FIGS. 1 and 5, the optical element 5 side main surface of the wiring board 7 is placed on the back surface 9n of the board housing recess 9d. The wiring substrate 7 is accommodated and disposed in the substrate accommodating recess 9d so that the slit portion 7h of the wiring substrate 7 is fitted into the fitting portion 9h of the substrate accommodating recess 9d so as to be in contact with each other. Thereby, the optical element 5 mounted on the wiring board 7 is accommodated in the element accommodating recess 9f of the substrate accommodating recess 9d. (1) The slit portion 7h of the wiring board 7 is fitted into the fitting portion 9h of the board housing recess 9d, and (2) the constricted portion 7j of the wiring board 7 is fitted with the lower inner side surface 9m of the board housing recess 9d. The wiring board 7 is fitted within a predetermined interval between the other end portion 9k of the joint portion 9h, and the wiring board 7 is located at a predetermined position in the substrate housing recess 9d (the position of the central portion of the light emitting / receiving portion 5d of each optical element 5). The corresponding sleeve portion 9e is positioned and disposed at a position where the position of the center portion of the end face 3c of the optical fiber 3b coincides. In particular, the position in the direction (x direction) orthogonal to the slit portion 7 h in the board housing recess 9 d in the wiring board 7 is positioned at a predetermined position by the fitting in (1) above. Moreover, the position (y direction) parallel to the slit part 7h in the board | substrate accommodation recessed part 9d in the wiring board 7 is positioned by the fitting of said (2) in a predetermined position. In this way, the wiring board 7 is positioned and arranged at a predetermined position in the board housing recess 9d.

  Although not shown, for example, a plurality of locking projections are formed in the vicinity of the opening 9c on the inner side surface of the substrate housing recess 9d, and the wiring board 7 is placed at a predetermined position in the substrate housing recess 9d as described above. When accommodated and disposed, each of the locking projections of the substrate accommodating recess 9d engages with the other main surface (back surface) of the wiring board 7, whereby the wiring substrate 7 is placed in the substrate accommodating recess 9d in the above state. It shall be contained and held. Alternatively, for example, a latching hook is erected on the back surface 9n of the substrate housing recess 9d and a latching hole is formed in the wiring substrate 7, and the wiring substrate 7 has a predetermined inside of the substrate housing recess 9d as described above. When placed in the position, the locking hooks and the locking holes of the both 7 and 9d are engaged, whereby the wiring board 7 is received and held in the board receiving recess 9d in the above state. .

  According to the optical connector structure 1 configured as described above, the convex portions 5c formed at a plurality of locations on the outer peripheral side surface of the optical element 5 are respectively the inner peripheral side surfaces of the element housing concave portions 7a of the wiring board 7. The optical element 5 is placed at a predetermined position on the wiring board 7 because the optical element 5 is positioned and arranged at a predetermined position in the element receiving concave portion 7a by fitting into the concave portions 7c formed at a plurality of corresponding positions on the upper side. Can be mounted with higher positioning accuracy.

  Further, the optical element 5 is fitted between the one opposing inner side surfaces 7d in the element accommodating recess 7a between the one opposing outer side surfaces 5e, and the convex portions formed on the respective outer side surfaces 5e. The optical element 5 and the element accommodating concave portion 5c are positioned and arranged at a predetermined position in the element accommodating concave portion 7a by fitting with the concave portions 7c formed on the inner side surfaces 7d on the element accommodating concave portion 7a side. Even when the distance between the two elements 7a can be fitted only in one direction, the optical element 5 can be effectively positioned at a predetermined position in the element accommodating concave part 7a by combining the fitting of the concave part 7c and the convex part 5c. Can be implemented.

  In addition, in a state where the optical element 5 is positioned and arranged at a predetermined position in the element accommodating recess 7a of the wiring substrate 7, the electrode portion 7f on the element accommodating recess 7a side and the electrode portion 5f on the optical element 5 side are connected by reflow connection. Even when the inner surface 7d of the wiring board 7 and the outer surface 5e of the optical element 5 are opposed to each other with a gap so as to face each other with a gap therebetween, the optical element 5 is satisfied by satisfying that condition. It can be mounted at a predetermined position above with higher positioning accuracy.

  Thus, by arranging the optical element 5 in the element accommodating recess 7a formed in the wiring board 7 as described above, it is possible to suppress the optical element 5 from protruding from the wiring board 7, and the optical element 5 The wiring board 7 mounted with can be reduced in thickness. Further, as described above, the electrode portion 7f disposed on the inner side surface of the element accommodating recess 7a of the wiring substrate 7 and the electrode portion 5f disposed on the outer side surface of the optical element 5 provide a gap for reflow connection. The inner surface of the wiring board 7 and the outer surface of the optical element 5 are opposed to each other with a gap therebetween so that the reflow soldering is performed between the element housing recess 7 a of the wiring board 7 and the optical element 5. Therefore, the reflow solder can be prevented from flowing to the peripheral portion where no solder is required, and the reflow connection can be made between the electrode portions by using the solder effectively.

  Further, since the convex portion 5c or the concave portion 7c is formed on the side surface of the wiring substrate 7 or the side surface of the optical element 5, the height of the convex portion 5c or the depth of the concave portion 7c, the wiring substrate 7 or the optical element. 5 can be prevented from becoming thick, and the wiring board 7 on which the optical element 5 is mounted can be made thinner.

  Further, a slit portion 7 h is formed in the wiring board 7 and a fitting portion 9 h is formed in the housing 9, and the wiring substrate 7 is fixed to the housing 9 by fitting the slit portion 7 h and the fitting portion 9 h. Since the wiring board 7 is disposed at the position, the wiring board 7 can be disposed at a predetermined position of the housing 9 with high positioning accuracy.

  In addition, the slit portion 7h is formed by being cut from the edge side of the wiring substrate 7 so that the constricted portion 7j is formed in the wiring substrate 7, and the fitting portion 9h is formed in the substrate accommodating recess 9d of the housing 9 One end portion 9i is coupled to one inner side surface 9j of each of the inner side surfaces 9j and 9m facing each other of the substrate housing recess 9d, and the other end portion 9k is opposed to the other of the inner side surfaces 9j and 9m facing each other. The wiring board 7 is formed in a plate shape facing the inner side surface 9m with a predetermined interval, and the slit portion 7h of the wiring board 7 is fitted into the fitting portion 9h of the substrate receiving recess 9d, and the constricted portion 7j thereof is the substrate receiving recess 9d. By being fitted within the predetermined interval between the other inner side surface 9m of the other and the other end portion 9k of the fitting portion 9h, it is positioned and arranged at a predetermined position in the substrate housing recess 9d. Housing the wiring board 7 with a simple structure Possible arrangement and to enhance the positioning accuracy in position.

  In this embodiment, the convex portion 5c is formed on the optical element 5 side and the concave portion 7c is formed on the wiring board 7 side. However, the concave portion 7c is formed on the optical element 5 side by reversing the convex portion and the concave portion. The protrusion 5c may be formed on the wiring board 7 side as well as formed.

1 is a schematic exploded perspective view of an optical connector structure according to an embodiment of the present invention. It is a disassembled perspective view of the optical element and wiring board in the optical connector structure which concerns on embodiment of this invention. It is a fragmentary sectional view of the III-III cross section of FIG. It is a partial top view of the wiring board which mounted the optical element in the optical connector structure concerning embodiment of this invention. It is VV sectional drawing of FIG. It is a disassembled perspective view of the optical element and wiring board in the conventional optical connector structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical connector structure 3 Opposite side optical connector 3b Optical fiber 3c Optical fiber end surface 5 Optical element 5b Each opposing outer surface 5c Convex part 5e The other opposing outer surface 5f Electrode part 7 Wiring board 7a Element accommodating recessed part 7b One Respective inner side surfaces 7c Recessed portion 7d The other opposite inner side surfaces 7f Electrode portion 7h Slit portion 7i Solder paste 7j Constricted portion 9 Housing 9d Substrate housing recessed portion 9h Fitting portion 9i One end surface of fitting portion 9k of fitting portion The other side 9m Lower inner side

Claims (5)

A structure of an optical connector that is detachably connected to a predetermined counterpart optical connector, and is provided with an optical element that is optically coupled to the counterpart optical connector mounted on a wiring board,
One of a convex portion or a concave portion is formed at each of a plurality of locations on the outer peripheral side surface of the optical element, and an element accommodating concave portion is formed on the mounting surface of the wiring board, on the inner peripheral side surface of the element accommodating concave portion. The other of the convex portion or the concave portion is formed at each of a plurality of corresponding locations,
In the optical element, one of the convex portion or the concave portion formed at each of the plurality of locations on the outer peripheral side surface of the optical element is respectively formed at the corresponding plurality of locations on the inner peripheral side surface of the element receiving concave portion. An optical connector structure characterized in that the optical connector structure is positioned and disposed at a predetermined position in the element receiving recess by being fitted to the other of the portion and the recess. One of the convex portions or concave portions is formed on one outer surface of each of the optical elements, and the convex portion or concave portions of each of the inner surfaces of the element housing concave portion of the wiring board are opposed to each other. The other is formed,
The optical element is fitted between the one opposing inner side surfaces of the element receiving recess between the one opposing outer surfaces, and one of the convex portion or the concave portion is on the element receiving recess side. 2. The optical connector structure according to claim 1, wherein the optical connector structure is positioned and disposed at a predetermined position in the element housing recess by fitting with the other of the protrusion or the recess. An electrode portion is disposed on the outer surface of the optical element, and an electrode portion that is reflow-connected to the electrode portion on the optical element side is disposed on the inner surface of the element housing recess of the wiring board,
The optical element is reflowed between the electrode part on the optical element side and the electrode part on the wiring board side in a state where the optical element is positioned and arranged at the predetermined position in the element receiving recess of the wiring board. 3. The light according to claim 1, wherein the outer surface of the optical element and the inner surface of the wiring board face each other with a gap so that a connection gap is secured. Connector structure. Further comprising a housing in which the counterpart optical connector is detachably fitted,
A slit portion is formed in the wiring board, and a fitting portion that fits into the slit portion is formed in the housing, and the wiring substrate fits the predetermined portion of the housing by fitting the slit portion and the fitting portion. The optical connector structure according to any one of claims 1 to 3, wherein the optical connector structure is disposed at a position. The slit portion is formed by cutting from the edge side of the wiring board so that a constriction is formed in the wiring board,
The housing is formed with a substrate housing recess in which the wiring board is housed and disposed.
One end of the fitting portion is coupled to one inner surface of the opposing inner surfaces of the substrate receiving recess, and the other end of each of the fitting portions is connected to each of the opposing inner surfaces. It is formed in a plate shape facing the other inner side surface of the side surfaces with a predetermined interval,
In the wiring board, the slit portion is fitted into the fitting portion of the substrate receiving recess, and the constricted portion is the other inner surface of the substrate receiving recess and the other end portion of the fitting portion. 5. The optical connector structure according to claim 4, wherein the optical connector structure is positioned and disposed at the predetermined position in the substrate housing recess by being fitted within the predetermined interval between.

Images