JP2018119997A - Photoelectric converter and connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photoelectric converter that reduces the possibility of an optical fiber core wire being disconnected, without increasing the size of a connector.SOLUTION: A photoelectric converter 1 comprises a connector 2 and an optical fiber 3. The connector 2 includes a housing 6, a photoelectric conversion block 4 for converting an electric signal and an optical signal to which an optical fiber core wire 31 is connected, and a fixing block 5 for fixing the optical fiber 3 to the housing 6. The housing 6 stores the photoelectric conversion block 4 and the fixing block 5 so as to be aligned in a first direction D1. The fixing block 5 has a space 511 through which the optical fiber core wire 31 penetrates. The space 511 is formed in such a way that a length L1 of an opening on a first plane 516 in a second direction D2 that intersects the first direction D1 at right angles is longer than the length of the opening on the first plane 516 in a direction other than the second direction D2 that intersects the first direction D1 at right angles.SELECTED DRAWING: Figure 3

Description

  The present invention generally relates to a photoelectric conversion device and a connector, and more particularly to a photoelectric conversion device and a connector that convert an electric signal and an optical signal.

  Conventionally, various photoelectric conversion devices that convert electrical signals and optical signals have been developed. Since such a photoelectric conversion device transmits data using an optical fiber, high-speed transmission can be realized as compared with a case where data is transmitted using an electric wire. Such a photoelectric conversion device is also excellent in electrical insulation.

  By the way, in such a photoelectric conversion device, when tension is applied to the optical fiber by expansion and contraction due to external force or temperature change, the tip of the optical fiber core wire is fixed to the photoelectric conversion block. There was a possibility of disconnection.

  In order to prevent the disconnection of the optical fiber core wire as described above, an optical transmission module having a configuration in which the optical fiber core wire is bent is known (for example, see Patent Document 1).

JP 2014-132365 A (see paragraphs 0048 and 0049 and FIG. 9)

  However, in the conventional connector (optical transmission module) described in Patent Document 1, there is a possibility that the optical fiber core wire is bent in all directions. For this reason, it is necessary to secure a large space for bending the optical fiber core wire so that the optical fiber core wire does not come into contact with the housing or the like even if the optical fiber core wire is bent in any direction. As a result, the conventional connector has a problem of becoming large.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a photoelectric conversion device and a connector that can reduce the possibility of disconnection of an optical fiber core wire without increasing the size of the connector. It is to provide.

  The photoelectric conversion device according to one aspect of the present invention includes a connector that performs photoelectric conversion, and an optical fiber that transmits an optical signal from the connector, and the optical fiber includes an optical fiber core wire through which the optical signal passes, A connector that covers the optical fiber core; the connector includes a housing; a photoelectric conversion block that is connected to the optical fiber core and converts an electrical signal and the optical signal; and the optical fiber is fixed to the housing. And the housing houses the photoelectric conversion block and the fixed block so that the photoelectric conversion block and the fixed block are aligned in a first direction, and the fixed block Including a first surface on the photoelectric conversion block side and a second surface different from the first surface, and opens to the first surface and the second surface, and the light A space through which the fiber core line passes, wherein the space has a first opening whose length in the first surface in a second direction orthogonal to the first direction is other than the second direction. It is formed so that it may become longer than the length of the opening in the said 1st surface in the direction orthogonal to this direction.

  In this photoelectric conversion device, it is preferable that the connector further includes a connector terminal portion including a plurality of connector terminals, and the second direction is a direction in which the plurality of connector terminals are arranged.

  In this photoelectric conversion device, it is preferable that the fixing block includes a fixing member having the space, and a pressing member that fixes the optical fiber to the housing by sandwiching the coating with the fixing member.

  In this photoelectric conversion device, the optical fiber further includes a tensile body provided between the optical fiber core wire and the coating, and the fixing member and the pressing member sandwich the coating and the tensile body. The optical fiber is preferably fixed to the housing.

  In this photoelectric conversion device, the space is formed such that the length of the opening on the first surface is longer than the length of the opening on the second surface in the second direction. Is preferred.

  In this photoelectric conversion device, the connector includes a core fixing member that fixes the optical fiber core, and the core fixing member from the second surface side of the fixing block toward the first surface side. It is preferable to further include an elastic body that is pushed into the space.

  In this photoelectric conversion device, it is preferable that the connector further includes an elastic mechanism provided to bypass the optical fiber core wire in the housing.

  In the photoelectric conversion device, the photoelectric conversion block includes a substrate and a photoelectric conversion module including a photoelectric conversion element and mounted on the substrate, and the connector is connected to the substrate and the substrate is connected to the first direction. It is preferable to further include a flexible substrate provided so as to be movable.

  A connector according to an aspect of the present invention is a connector that performs photoelectric conversion by being connected to an optical fiber including an optical fiber core wire through which an optical signal passes. The housing, the optical fiber core wire is connected to the electrical signal, and A photoelectric conversion block for converting an optical signal; and a fixing block for fixing the optical fiber to the housing, wherein the housing is arranged such that the photoelectric conversion block and the fixing block are aligned in a first direction. The photoelectric conversion block and the fixed block are housed, and the fixed block includes a first surface on the photoelectric conversion block side and a second surface different from the first surface, A space that is open to the surface and the second surface and through which the optical fiber core wire penetrates, the space in the first surface in a second direction orthogonal to the first direction. Characterized in that it is formed to be longer than the length of the opening in the first surface in the direction in which the length of the mouth is orthogonal to the first direction than the second direction.

  In the photoelectric conversion device and the connector according to each aspect of the present invention, the possibility of disconnection of the optical fiber core wire can be reduced without increasing the size of the connector.

1 is an external view of a photoelectric conversion device according to Embodiment 1. FIG. 1 is an external view of a main part of a photoelectric conversion device according to Embodiment 1. FIG. 3 is a cross-sectional view of a main part of the photoelectric conversion device according to Embodiment 1. FIG. 2 is an exploded perspective view of a fixed block according to Embodiment 1. FIG. 5A and 5B are external views of the fixing member according to the first embodiment. 6A is a front view of the fixing member according to the first embodiment, FIG. 6B is a left side view of the fixing member according to the first embodiment, and FIG. 6C is a right side view of the fixing member according to the first embodiment. 6D is a plan view of the fixing member according to the first embodiment, FIG. 6E is a cross-sectional view of the fixing member according to the first embodiment, taken along line A1-A1 in FIG. 6D, and FIG. It is sectional drawing of the A2-A2 line | wire of FIG. 6A of the fixing member which concerns on the form 1. FIG. 7A and 7B are external views of the pressing member according to the first embodiment. 8A is a front view of the pressing member according to Embodiment 1, FIG. 8B is a left side view of the pressing member according to Embodiment 1, and FIG. 8C is the FIG. It is sectional drawing of an A3-A3 line. FIG. 3 is a perspective view of the optical fiber and the fixing block according to Embodiment 1 in the middle of a process for fixing the optical fiber to the fixing block. FIG. 4 is a perspective view of the optical fiber and the fixing block according to Embodiment 1 after the process for fixing the optical fiber to the fixing block is completed. FIG. 11 is a cross-sectional view taken along line A4-A4 in FIG. 6 is a cross-sectional view of a main part of a photoelectric conversion device according to Embodiment 2. FIG. 6 is a cross-sectional view of a main part of a photoelectric conversion device according to Embodiment 3. FIG. FIG. 10 is a cross-sectional view of a main part of a photoelectric conversion device according to a modification of Embodiment 3. 6 is an external view of a main part of a photoelectric conversion device according to Embodiment 4. FIG. 6 is a cross-sectional view of a main part of a photoelectric conversion apparatus according to Embodiment 4. FIG. 6 is a cross-sectional view of a main part of a photoelectric conversion apparatus according to Embodiment 4. FIG. 18A is a front view of an example of a photoelectric conversion module, and FIG. 18B is a cross-sectional view taken along line C1-C1 of FIG. 18A. 19A is a front view of another example of the photoelectric conversion module, and FIG. 19B is a cross-sectional view taken along line C2-C2 of FIG. 19A.

  Hereinafter, the details of the photoelectric conversion devices according to Embodiments 1 to 4 will be described with reference to the drawings.

(Embodiment 1)
The photoelectric conversion device 1 according to Embodiment 1 includes two connectors (plugs) 2 and an optical fiber 3 as shown in FIG. The photoelectric conversion device 1 has a structure in which connectors 2 are connected to each other by an optical fiber 3. Each connector 2 is configured to perform photoelectric conversion. The optical fiber 3 is configured to transmit an optical signal from each connector 2.

  The photoelectric conversion device 1 is used between devices or devices such as servers, video devices, industrial devices, measuring devices, commercial printing devices, and medical devices. More specifically, the photoelectric conversion device 1 is used for signal transmission between substrates in the device, signal transmission between modules in the device, and signal transmission between devices.

  As shown in FIG. 3, the optical fiber 3 includes two optical fiber cores 31, a coating 32, and a strength member 33. Each optical fiber core 31 includes a core having a high refractive index provided in the center portion, and a clad having a refractive index lower than that of the core provided around the core. The coating 32 is a resin such as vinyl chloride, for example, and covers each optical fiber core wire 31. The strength member 33 is, for example, an aramid fiber or a steel wire, and is provided between the optical fiber core wire 31 and the coating 32 in order to increase the strength against tension on the optical fiber 3. In this embodiment and the following embodiments, the optical fiber is a general term for an optical fiber cord and an optical fiber cable.

  As shown in FIG. 2, each connector 2 includes a photoelectric conversion block 4, a fixed block 5, and a housing 6. Each connector 2 further includes a bushing 21, a connector terminal portion 22, and an outer case 23 (see FIG. 1).

  The bushing 21 is made of, for example, resin, and is attached in the vicinity of the housing 6 so that the optical fiber 3 is not bent beyond an allowable angle.

  The connector terminal portion 22 includes a plurality of connector terminals 221. The connector terminal portion 22 is housed on the first end side in the first direction D1 in the housing 6. The plurality of connector terminals 221 are provided side by side in a second direction D2 orthogonal to the first direction D1. The connector terminal unit 22 is connected to a connector terminal unit of a device-side connector (receptacle), so that electrical signals can be exchanged between the photoelectric conversion device 1 and the device, power can be supplied, and ground wiring can be performed. .

  The housing 6 is made of, for example, metal and is formed in a box shape having a space 61. The housing 6 houses the photoelectric conversion block 4, the fixed block 5, and the connector terminal portion 22. More specifically, the housing 6 houses the photoelectric conversion block 4 on the first end side in the first direction D1, and the fixed block 5 on the second end side facing the first end side in the first direction D1. Stored. That is, the housing 6 houses the photoelectric conversion block 4, the fixed block 5, and the connector terminal portion 22 so that the connector terminal portion 22, the photoelectric conversion block 4, and the fixed block 5 are arranged in this order in the first direction D1. doing. Moreover, the length of the housing 6 in the second direction D2 is longer than the length in the third direction D3 (see FIG. 11) orthogonal to both the first direction D1 and the second direction D2. An opening 62 is formed in the space 61.

  As shown in FIG. 1, the outer case 23 includes a body 231 and a cover 232. The outer case 23 is configured to cover the remaining part of the housing 6 excluding the part housing the connector terminal portion 22. That is, the outer case 23 covers a portion of the housing 6 that houses the photoelectric conversion block 4 and the fixed block 5.

  As shown in FIG. 2, the photoelectric conversion block 4 is configured to convert an electrical signal into an optical signal or convert an optical signal into an electrical signal. Each optical fiber core wire 31 is connected to the photoelectric conversion block 4. The photoelectric conversion block 4 includes a substrate 41 and a photoelectric conversion module 42. Each optical fiber core wire 31 only needs to be optically connected to the photoelectric conversion block 4.

  The substrate 41 is a plate-like and hard substrate. A photoelectric conversion module 42 and a photoelectric conversion circuit are mounted on the substrate 41.

  As shown in FIGS. 18A and 18B, the photoelectric conversion module 42 includes two photoelectric conversion elements 421 and two connection mechanisms. The two photoelectric conversion elements 421 and the connection mechanism respectively correspond to the two optical fiber cores 31. Each of the two connection mechanisms is configured such that the tip of the corresponding optical fiber core wire 31 is connected.

  Each of the two photoelectric conversion elements 421 is a light emitting element or a light receiving element. In this embodiment, since an optical signal can be transmitted bidirectionally between the two connectors 2 using the two optical fiber cores 31, one of the two photoelectric conversion elements 421 is a light emitting element. The other is a light receiving element. As the light emitting element, for example, a semiconductor laser or a light emitting diode is used. As the semiconductor laser, a VCSEL (Vertical Cavity Surface Emitting LASER) or the like is used. For example, a photodiode is used as the light receiving element.

  An example of the connection structure of the photoelectric conversion module 42 is shown in FIGS. 18A and 18B. The photoelectric conversion module 42 includes a silicon substrate 422 as a connection mechanism. The silicon substrate 422 includes a mirror 423, two V-shaped grooves 424, and two wiring portions 425. The mirror 423 is provided to bend the optical path. The corresponding optical fiber core wire 31 is mounted in each groove 424. A corresponding photoelectric conversion element 421 is connected to each wiring portion 425. Each wiring part 425 is connected to a photoelectric conversion circuit mounted on the substrate 41.

  In the case where the photoelectric conversion element 421 is a light emitting element, an optical signal from the photoelectric conversion element 421 is transmitted to the mirror 423. The optical signal transmitted to the mirror 423 is transmitted to the optical fiber core 31 after the optical path is bent by 90 ° by the mirror 423. When the photoelectric conversion element 421 is a light receiving element, an optical signal from the optical fiber core wire 31 is transmitted to the mirror 423. The optical signal transmitted to the mirror 423 is transmitted to the photoelectric conversion element 421 after the optical path is bent by 90 ° by the mirror 423.

  With such a silicon substrate 422, an optical signal can be accurately transmitted between the photoelectric conversion element 421 and the optical fiber core wire 31, and the photoelectric conversion module 42 can be configured in a thin shape.

  As another example of the structure of the photoelectric conversion module 42, as shown in FIGS. 19A and 19B, the photoelectric conversion element 421 may be provided on the silicon substrate 422 so as to emit or receive light in the direction of the groove 424. In this case, an optical signal can be directly transmitted between the photoelectric conversion element 421 and the optical fiber core wire 31.

  The photoelectric conversion circuit mounted on the substrate 41 includes a drive circuit that drives the light emitting element and an amplifier circuit that amplifies the signal from the light receiving element.

  The fixed block 5 is configured to fix the optical fiber 3 to the housing 6. As shown in FIGS. 2 and 4, the fixing block 5 includes a fixing member 51 and two pressing members 52.

  As shown in FIGS. 5A and 5B and FIGS. 6A to 6F, the fixing member 51 is made of, for example, resin, and includes a space 511, two recesses 512, two grooves 513, two recesses 514, and two recesses. 515. Further, the fixing member 51 has a first surface 516 on the photoelectric conversion block 4 side and a second surface 517 different from the first surface 516. The second surface 517 is opposed to the first surface 516 in the first direction D1. The space 511 is open to the first surface 516 and the second surface 517. The optical fiber core wire 31 (see FIG. 3) passes through the space 511. A pair of grooves 518 are formed in the space 511 along the first direction D1.

  Each of the two pressing members 52 is formed, for example, by bending a plate-like metal. As shown in FIGS. 7A and 7B and FIGS. 8A to 8C, each pressing member 52 includes a base portion 521, two side portions 522, and two tip portions 523. The base 521, the two side portions 522, and the two tip portions 523 are integrally formed. Each distal end portion 523 is formed with a first pressing portion 524 for pressing the covering 32 together with the fixing member 51. Specifically, the first pressing portion 524 has a plurality of projections, and the plurality of projections are pressed into the coating 32 so that the coating 32 is pressed. The base 521 is formed with a second pressing portion 525 for pressing the strength member 33 with the fixing member 51. Specifically, the strength member 33 is pressed by inserting the second pressing portion 525 into the strength member 33 and pressing it on the fixing member 51. The pressing member 52 is fitted and fixed to the fixing member 51.

  The fixing member 51 and the two pressing members 52 are configured to hold the coating 32 and fix the optical fiber 3 to the housing 6. Further, the fixing member 51 and the pressing member 52 are configured to fix the optical fiber 3 to the housing 6 with the strength member 33 interposed therebetween.

  Next, a process for fixing the optical fiber 3 to the fixing block 5 will be described with reference to FIGS.

  First, as shown in FIG. 4, the coating 32 and the strength member 33 at the tip of the optical fiber 3 are removed to make the tip of the optical fiber 3 only the optical fiber core 31. At this time, the coating 32 and a part of the strength member 33 are left separated from the optical fiber core wire 31. Then, the optical fiber core wire 31 at the tip of the optical fiber 3 is passed through the space 511 of the fixing member 51. Thereafter, a part of the coating 32 separated from the optical fiber core wire 31 is inserted into the recess 512 of the fixing member 51. A part of the strength member 33 separated from the optical fiber core 31 is placed in the recess 514 of the fixing member 51.

  Thereafter, as shown in FIGS. 4, 9, and 10, the distal end portion 523 of each pressing member 52 is fitted into the groove 513 of the fixing member 51 so that the base 521 of each pressing member 52 covers the recess 514 of the fixing member 51. At this time, the peripheral surfaces of the first pressing portion 524 and the concave portion 512 of the fixing member 51 sandwich the covering 32 inserted into the concave portion 512. Thereby, the coating 32 is fixed to the fixed block 5. Further, the second pressing portion 525 and the fixing member 51 of the pressing member 52 sandwich the strength member 33 placed in the recess 514. Thereby, the strength member 33 is fixed to the fixed block 5.

  In the fixed block 5 (fixed member 51 and pressing member 52) assembled as described above, the optical fiber 3 is fixed to the fixed block 5 as shown in FIG. The optical fiber core 31 at the tip of the optical fiber 3 passes through the space 511 of the fixing member 51, and is positioned in the housing 6 when the fixing block 5 is accommodated in the housing 6. The optical fiber core wire 31 is connected to the photoelectric conversion block 4 in the housing 6.

  The fixed block 5 (the fixed member 51 and the pressing member 52) is housed in the housing 6 and fixed. By fixing the optical fiber 3 as a separate component from the housing 6, the optical fiber 3 can be easily fixed at the time of assembly, and the optical fiber 3 can be easily aligned.

  In the present embodiment, the fixing member 51 and the two pressing members 52 fix the covering 32 and the strength member 33 at different positions. Thereby, since the coating | cover 32 and the tension body 33 can be fixed with the same components, it can be made cheap compared with the structure where the coating | coated 32 and the strength body 33 are fixed with a different component. Here, when the same parts are used, if the same parts are fixed, the tensile strength member 33 becomes slippery due to the elasticity of the coating 32, and the optical fiber 3 cannot be sufficiently fixed. However, in the present embodiment, although the same parts are used, the place where the covering 32 is fixed and the place where the tensile strength member 33 is fixed are changed, and thus the above-described problem does not occur. That is, the fixing of the covering 32 and the fixing of the strength member 33 can be sufficiently performed. Further, the tensile body 33 and the coating 32 may be bonded to the fixing member 51 and the pressing member 52.

  In the fixing block 5 having such a structure, as shown in FIGS. 2, 3, 5A and 5B and FIGS. 6A to 6F, the space 511 of the fixing member 51 has only the length of the opening in one direction in the other direction. It is formed to be longer than the length of the opening. Hereinafter, details of the space 511 will be described.

  First, the space 511 of the fixing member 51 has an opening length L1 in the first surface 516 in the second direction D2 orthogonal to the first direction D1, and the first direction D1 other than the second direction D2. It is formed so as to be longer than the length of the opening in the first surface 516 in the orthogonal direction. For example, the length L1 is formed to be longer than the length L3 in the third direction D3 (see FIG. 4) orthogonal to both the first direction D1 and the second direction D2.

  The space 511 of the fixing member 51 is formed such that the opening length L1 at the first surface 516 is longer than the opening length L2 at the second surface 517 in the second direction D2. ing.

  Since the space 511 of the fixing member 51 is formed as described above, the optical fiber core 31 in the state where the optical fiber core wire 31 of the optical fiber 3 penetrates the space 511 as shown in FIGS. The line 31 can be moved freely in the space 511. Thereby, the optical fiber core wire 31 can be bent in the second direction D <b> 2 within the housing 6. As a result, the length L4 of the optical fiber core 31 in the housing 6 is longer than the distance L5 between the tip of the optical fiber 31 and the end of the housing 6 (L4> L5).

  In the photoelectric conversion device 1 according to the present embodiment, when no tension is applied to the optical fiber 3, the optical fiber core wire 31 is bent in the housing 6 due to the space 511 of the fixing member 51. On the other hand, when a tension is applied to the optical fiber 3, even if the coating 32 extends due to the tension applied to the optical fiber 3, the optical fiber core wire 31 is bent, so that it does not extend straight. Thereby, the possibility of disconnection of the optical fiber core wire 31 can be reduced. Thereafter, when the tension on the optical fiber 3 is lost, the optical fiber core wire 31 returns to the state before the tension is applied to the optical fiber 3. That is, the optical fiber core wire 31 bends before tension is applied to the optical fiber 3. The direction in which the optical fiber 3 is bent is a direction in which the thin shape of the photoelectric conversion module 42 can be effectively used.

  Note that the second surface 517 is not necessarily opposed to the first surface 516.

  In the photoelectric conversion device 1 and the connector 2 according to the present embodiment described above, when the optical fiber core wire 31 passes through the fixing block 5 for fixing the optical fiber 3, the optical fiber core wire 31 is placed in a specific direction ( It can be bent in the second direction D2). Thereby, it is not necessary to enlarge the photoelectric conversion apparatus 1 compared with the case where the optical fiber core wire 31 has a space that can be bent in any direction. As a result, when tension is applied to the optical fiber 3 such as when the optical fiber 3 is pulled by a transient force, the possibility of disconnection of the optical fiber core 31 is reduced without increasing the size of the photoelectric conversion device 1. Can do.

(Embodiment 2)
As shown in FIG. 12, the photoelectric conversion device 1 according to the second embodiment is different from the photoelectric conversion device 1 according to the first embodiment (see FIG. 3) in that it includes a core wire fixing mechanism 7. In addition, about the component similar to the photoelectric conversion apparatus 1 which concerns on Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 12, the connector 2 of this embodiment includes a core wire fixing mechanism 7. The core wire fixing mechanism 7 is configured to fix the optical fiber core wire 31 to the fixing block 5 (fixing member 51).

  The core wire fixing mechanism 7 includes a core wire fixing member 71, an elastic body 72, and a storage portion 73. The core wire fixing member 71 is configured to fix the optical fiber core wire 31. The elastic body 72 is a spring, for example, and in a state of being housed in the housing portion 73, the core wire fixing member from the second surface 517 side of the housing 6 fixing block 5 (fixing member 51) toward the first surface 516. 71 is pushed in.

  By pushing the core wire fixing member 71 by the elastic body 72, the optical fiber core wire 31 can be sufficiently bent in the housing 6. Thereby, after tension | tensile_strength is added to the optical fiber 3, the bending of the optical fiber core wire 31 is maintainable by pushing in the core wire fixing member 71 so that the optical fiber core wire 31 may bend again.

  In the photoelectric conversion device 1 and the connector 2 according to the present embodiment described above, the optical fiber core wire 31 is attached to the housing 6 by pushing the core wire fixing member 71 to which the optical fiber core wire 31 is fixed by the elastic body 72. Can be flexed inside.

(Embodiment 3)
As shown in FIG. 13, the photoelectric conversion device 1 according to the third embodiment is different from the photoelectric conversion device 1 according to the first embodiment (see FIG. 3) in that an elastic mechanism 8 is provided. In addition, about the component similar to the photoelectric conversion apparatus 1 which concerns on Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The connector 2 of this embodiment is provided with the elastic mechanism 8, as shown in FIG. The elastic mechanism 8 is provided so as to bypass the optical fiber core wire 31 in the housing 6.

  The elastic mechanism 8 of this embodiment is an elastic body 81. The elastic body 81 is provided on a straight line connecting the connection point of the optical fiber core wire 31 and the space 511 on the second surface 517 side of the fixing member 51. The elastic body 81 has an arc shape in cross section so that the optical fiber core wire 31 is bent.

  In the photoelectric conversion device 1 and the connector 2 according to this embodiment described above, the bending of the optical fiber core wire 31 can be maintained by the elastic mechanism 8. And even if the optical fiber 3 is pulled, the bending of the optical fiber core wire 31 can be reduced by the deformation of the elastic mechanism 8 (elastic body 81). Further, since the optical fiber core wire 31 can be prevented from being bent below the minimum radius of curvature at which the optical fiber core wire 31 may break, the optical fiber 3 can be protected.

  As a modification of the present embodiment, as shown in FIG. 14, the elastic mechanism 8 may include a bypass portion 82 and an elastic body 83 instead of the elastic body 81. The bypass portion 82 is provided on a straight line connecting the connection point of the optical fiber core wire 31 and the space 511 on the second surface 517 side of the fixing member 51. The detour portion 82 has an arc shape in cross section. The elastic body 83 is a spring, for example, and is configured to move the detour portion 82 in the second direction D2.

  In the photoelectric conversion device 1 and the connector 2 according to this modification, the bending of the optical fiber core wire 31 can be maintained by the elastic mechanism 8. Even if the optical fiber 3 is pulled, the detour portion 82 can be moved by the elastic body 83, so that the bending of the optical fiber core wire 31 can be reduced.

  The technique using the elastic mechanism 8 of this embodiment or the elastic mechanism 8 of this modification may be applied not only to the photoelectric conversion device 1 according to the first embodiment but also to the photoelectric conversion device 1 according to the second embodiment. .

(Embodiment 4)
The photoelectric conversion device 1 according to the fourth embodiment is different from the photoelectric conversion device 1 according to the first embodiment (see FIG. 2) in that the flexible substrate 9 is provided as illustrated in FIGS. In addition, about the component similar to the photoelectric conversion apparatus 1 which concerns on Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The connector 2 of this embodiment is provided with the flexible substrate 9, as shown in FIGS. The flexible substrate 9 is housed in the housing 6 and connected to the substrate 41 of the photoelectric conversion block 4. The flexible substrate 9 is provided so that the substrate 41 can be moved in the first direction D1. More specifically, the flexible substrate 9 is disposed in the housing 6 so as to be folded back in the first direction D1. The connector 2 may include a movable guide so that the flexible substrate 9 does not move in a state where the flexible substrate 9 is bent with an excessive radius of curvature.

  In the photoelectric conversion device 1 according to the present embodiment, when no tension is applied to the optical fiber 3, the optical fiber core wire 31 is bent in the housing 6 by the space 511 of the fixing member 51 as shown in FIG. Yes. Further, since there is no tension from the optical fiber 3, the substrate 41 of the photoelectric conversion block 4 is located at a normal position as shown in FIGS. On the other hand, when tension is applied to the optical fiber 3, the substrate 41 of the photoelectric conversion block 4 is moved in the direction of the arrow B1 by the tension on the optical fiber 3, as shown in FIG. Then, when the tension | tensile_strength to the optical fiber 3 is lose | eliminated, the board | substrate 41 of the photoelectric conversion block 4 returns to the original position (normal position).

  In the photoelectric conversion device 1 and the connector 2 according to the present embodiment described above, the photoelectric conversion block 4 can be moved by the flexible substrate 9 even if tension is applied to the optical fiber 3. Thereby, the possibility of disconnection of the optical fiber core wire 31 can be further reduced. The flexible substrate 9 and the substrate 41 may be an integrated rigid flexible substrate.

  The technique using the flexible substrate 9 of the present embodiment may be applied not only to the photoelectric conversion device 1 according to the first embodiment but also to the photoelectric conversion device 1 according to the second and third embodiments.

  Further, the technique using the flexible substrate 9 of the present embodiment may be applied to a photoelectric conversion device that does not include the fixed block 5. That is, the technique using the flexible substrate 9 of the present embodiment may be applied to a photoelectric conversion device that does not have the space 511 as described above in the fixing member 51 of the fixing block 5.

  In addition, in each embodiment, although the transmission specification of the photoelectric conversion apparatus 1 demonstrated the case where it was a two-channel bidirectional transmission type using the two optical fiber core wires 31, the transmission specification of the photoelectric conversion apparatus 1 is It is not limited to the above type. The transmission specification of the photoelectric conversion device 1 may be a one-channel type using only one optical fiber core 31 or may use three or more optical fiber cores 31. Moreover, the transmission direction of the photoelectric conversion apparatus 1 may be bidirectional or may be only one direction.

  Moreover, the photoelectric conversion apparatus 1 is not limited to the structure provided with the two connectors 2. As a modification of each embodiment, the photoelectric conversion device 1 may include only one connector 2. In the photoelectric conversion device 1 according to this modification, the connector 2 is connected to only one of both ends of the optical fiber 3, and the other connector is connected to the other end.

DESCRIPTION OF SYMBOLS 1 Photoelectric conversion apparatus 2 Connector 22 Connector terminal part 221 Connector terminal 3 Optical fiber 31 Optical fiber core wire 32 Coating | cover 33 Strength member 4 Photoelectric conversion block 5 Fixing block 51 Fixing member 511 Space 516 1st surface 517 2nd surface 52 Holding | suppressing Member 6 Housing 71 Core wire fixing member 72 Elastic body 8 Elastic mechanism 9 Flexible substrate

Claims (9)

A connector for photoelectric conversion;
An optical fiber that transmits an optical signal from the connector;
The optical fiber is
An optical fiber core wire through which the optical signal passes;
A coating covering the optical fiber core wire,
The connector is
A housing;
A photoelectric conversion block to which the optical fiber is connected and converts an electrical signal and the optical signal;
A fixing block for fixing the optical fiber to the housing;
The housing houses the photoelectric conversion block and the fixed block so that the photoelectric conversion block and the fixed block are arranged in a first direction,
The fixed block includes a first surface on the photoelectric conversion block side and a second surface different from the first surface, and opens to the first surface and the second surface, and the optical fiber. Having a space through which the core runs,
The first space in the direction perpendicular to the first direction other than the second direction is the length of the opening in the first surface in the second direction orthogonal to the first direction. It is formed so that it may become longer than the length of the opening in a surface. The photoelectric conversion apparatus characterized by the above-mentioned. The connector is
Further comprising a connector terminal portion including a plurality of connector terminals,
The photoelectric conversion device according to claim 1, wherein the second direction is a direction in which the plurality of connector terminals are arranged. The fixed block is
A fixing member having the space;
The photoelectric conversion device according to claim 1, further comprising: a pressing member that sandwiches the coating with the fixing member and fixes the optical fiber to the housing. The optical fiber is
A tension member provided between the optical fiber core and the coating;
The photoelectric conversion device according to claim 3, wherein the fixing member and the pressing member fix the optical fiber to the housing by sandwiching the covering and the strength member.   The said space is formed in the said 2nd direction so that the length of the opening in the said 1st surface may become longer than the length of the opening in the said 2nd surface. The photoelectric conversion apparatus of any one of 1-4. The connector is
A core fixing member for fixing the optical fiber core;
The elastic body which pushes the said core wire fixing member into the said space toward the said 1st surface side from the said 2nd surface side of the said fixing block is further provided. The photoelectric conversion device according to item. The connector is
The photoelectric conversion device according to claim 1, further comprising an elastic mechanism provided so as to bypass the optical fiber core wire in the housing. The photoelectric conversion block is
A substrate,
A photoelectric conversion module including a photoelectric conversion element and mounted on the substrate;
The connector is
The photoelectric conversion device according to claim 1, further comprising a flexible substrate connected to the substrate and provided so as to be movable in the first direction. A connector that performs photoelectric conversion by being connected to an optical fiber including an optical fiber core wire through which an optical signal passes,
A housing;
A photoelectric conversion block to which the optical fiber is connected and converts an electrical signal and the optical signal;
A fixing block for fixing the optical fiber to the housing;
The housing houses the photoelectric conversion block and the fixed block so that the photoelectric conversion block and the fixed block are arranged in a first direction,
The fixed block includes a first surface on the photoelectric conversion block side and a second surface different from the first surface, and opens to the first surface and the second surface, and the optical fiber. Having a space through which the core runs,
The first space in the direction perpendicular to the first direction other than the second direction is the length of the opening in the first surface in the second direction orthogonal to the first direction. A connector characterized by being formed so as to be longer than the length of the opening in the surface.

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