JP2010198047A - Optical receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical receiver that facilitates, for example, addition of a photoelectric conversion unit. <P>SOLUTION: The housing of the optical receiver includes: a photoelectric conversion space for housing a photoelectric conversion unit 30; an optical fiber-housing space which is a space for housing an optical fiber tray 20, is formed on the opening side of the housing from the photoelectric conversion space, and is arranged in a position unstacked on the photoelectric conversion space; an optical fiber-housing and -fixing means which, in the optical fiber housing space, freely attachably/detachably fixes the optical fiber tray 20; and a rib which can screw on the photoelectric conversion unit 30 in the photoelectric conversion space and which protrudes toward the opening 11a of the housing. The photoelectric conversion unit 30 includes a notched part which is engaged with the rib and which is formed in a position and a shape substantially corresponding to the rib when the photoelectric conversion unit is arranged in the photoelectric conversion space. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical receiver for interconnecting a plurality of optical fibers for an optical transmission service or for converting an optical signal transmitted from the optical fiber into an electrical signal.

  Currently, FTTH (Fiber To The Home), which is a data communication service for homes using optical fibers, is spreading to ordinary homes. In this FTTH, an optical fiber installed outdoors is connected to an optical receiver installed on an outer wall of a house. The communication data transmitted from the optical fiber via the optical receiver is further transmitted to each device such as a personal computer or a TV in the home.

  Such functions of the optical receiver are mainly classified into a communication function and a broadcast function. Among these, the communication function is a function for enabling Internet communication in the home, and is specifically provided by connecting an outdoor optical fiber to an optical fiber in the home. The broadcast function is a function for making it possible to view a television broadcast in the home. Specifically, it converts an optical signal for broadcasting transmitted through an outdoor optical fiber into an electrical signal. Provided by supplying to the home.

  Then, in order to provide such two functions, the conventional optical receiver is configured by accommodating an optical fiber accommodating portion and a photoelectric conversion unit inside the casing. Among these, the optical fiber housing is a component mainly responsible for communication functions, and includes a fixing means for fixing a mechanical splice for connecting an outdoor optical fiber and a home optical fiber. Further, the optical fiber housing part also functions as a surplus length processing part for winding up a surplus part of an outdoor optical fiber or a home optical fiber. The photoelectric conversion unit is a component mainly responsible for a broadcasting function, and converts an optical signal for broadcasting transmitted via an outdoor optical fiber into an electric signal. The electrical signal thus converted is output to the outside of the optical receiver via the output terminal, and transmitted to each device such as a home TV via the coaxial cable.

  The fixing structure between the optical fiber housing portion and the photoelectric conversion unit will be described in more detail. First, the photoelectric conversion unit is housed in the housing, and the photoelectric conversion unit is secured to the rear surface of the housing with screws. It was. And the optical fiber accommodating part was mounted in the upper surface of this photoelectric conversion unit, and this optical fiber accommodating part was latched by the housing | casing so that attachment or detachment was possible (for example, refer patent document 1).

Japanese Patent Laid-Open No. 2004-354885

  Here, in recent years, at the beginning of installation of an optical receiver, there is an increasing need for using only a communication function and adding a broadcast function after a certain period of time. Therefore, it is desired to construct an optical receiver that has only an optical fiber housing portion and can add a photoelectric conversion unit later.

  However, the conventional optical receiver is designed on the assumption that both the communication function and the broadcasting function are achieved, and the optical receiver and the photoelectric conversion unit are both housed in the housing. There has been a problem that the above-mentioned recent needs cannot be met. For example, the optical fiber housing portion is structured to be fixed to the housing in a state of being placed on the photoelectric conversion unit, and cannot be fixed without the photoelectric conversion unit. Therefore, it was practically impossible to additionally accommodate the photoelectric conversion unit later. In addition, since the photoelectric conversion unit is fixed to the housing with screws, it is troublesome to accommodate the photoelectric conversion unit.

  The present invention has been made in view of the above, and it is easy to accommodate only the optical fiber accommodating portion regardless of the presence or absence of the photoelectric conversion unit, or to easily accommodate the photoelectric conversion unit after accommodating only the optical fiber accommodating portion. An object of the present invention is to provide an optical receiver that can be added.

  In order to solve the above-mentioned problems and achieve the object, an optical receiver according to claim 1 includes an optical fiber accommodating means for accommodating a plurality of interconnected optical fibers, and an optical fiber. An optical receiver that detachably accommodates a photoelectric conversion means for converting a transmitted optical signal into an electrical signal inside the casing through an opening of the casing, and the casing includes: A photoelectric conversion space for housing the photoelectric conversion means in the housing, and a space for housing the optical fiber housing means in the housing, than the photoelectric conversion space An optical fiber housing space formed on the opening side of the housing and disposed at a position not overlapping with the photoelectric conversion space, and the optical fiber housing means being detachable in the optical fiber housing space Optical fiber housing for fixing Fixing means and screw receiving means capable of screwing the photoelectric conversion means in the photoelectric conversion space, and projecting toward the opening side of the housing, the photoelectric conversion means A fitting means which is locked by the screw receiving means, and is formed in a position and shape substantially corresponding to the screw receiving means when the photoelectric conversion means is disposed in the photoelectric conversion space. It is characterized by providing.

  The optical receiver according to claim 2 is the optical receiver according to claim 1, wherein the screw receiving means is formed in a substantially cylindrical shape, and a screw hole is formed at a substantially central position in the plane. .

  The optical receiver according to claim 3 is the optical receiver according to claim 1 or 2, wherein the screw receiving means is engaged with the fitting means of the photoelectric conversion means, and the photoelectric conversion means is It was impossible to move in a direction substantially perpendicular to the protruding direction of the screw receiving means.

  According to the optical receiver of the first aspect, since the screw receiving means is substantially fitted to the fitting means, the photoelectric conversion means can be fixed to the housing with the fitting structure using the screw receiving means. In this way, by using the screw receiving means for fixing the photoelectric conversion means, the screw is fixed when screw fixing is necessary, and the screw fixing is omitted when the screw fixing is unnecessary. It is possible to reduce the manufacturing cost by eliminating the necessity of providing a structure exclusively for locking by providing the screw receiving means with a plurality of functions such as fixing by the structure.

It is a front view of the optical receiver which concerns on embodiment of this invention. It is a bottom view of FIG. It is a side view of FIG. It is AA arrow sectional drawing of FIG. It is a perspective view in the open lid state of an optical receiver. It is a disassembled perspective view in the state which removed the optical fiber tray from the optical receiver of FIG. It is a disassembled perspective view in the state where the photoelectric conversion unit was further removed from the optical receiver of FIG. It is the perspective view which looked at the photoelectric conversion unit from the back side. It is an expanded sectional view which shows the latching state of a photoelectric conversion unit and a rib. It is an expansion perspective view of the upper part of a housing | casing and an optical fiber tray. It is an expanded sectional view of the upper part of a case. It is an expanded sectional view of the upper part of a case and an optical fiber tray. It is an expansion perspective view of the lower part of a housing | casing and an optical fiber tray. It is an expanded sectional view of the lower part of a case. It is an expanded sectional view of the lower part of a case and an optical fiber tray.

  Embodiments of an optical receiver according to the present invention will be described below in detail with reference to the accompanying drawings. [I] First, the basic concept of the present embodiment will be described, then [II] the specific contents of the present embodiment will be described, and [III] Finally, a modification to the present embodiment will be described. However, the present invention is not limited by the present embodiment.

[I] Basic concept of the present embodiment First, a basic concept common to the present embodiment will be described. The optical receiver according to the present embodiment is installed outside a general dwelling unit to realize FTTH, and provides the above-described communication function and broadcasting function. However, the service form in which the optical receiver is incorporated is arbitrary without being limited to FTTH, and the function provided by the optical receiver is not limited to the communication function or the broadcasting function. In the following description, regarding the communication function, it is assumed that an optical fiber (optical cable) from the outside is connected to the indoor optical fiber, and regarding the broadcasting function, the optical signal from the optical fiber from the outside is photoelectrically converted and the indoor coaxial is connected. The output is made to the cable, but is not limited to such a connection form.

  One of the features of this optical receiver is that the structure for fixing the optical fiber housing to the housing is performed without depending on the photoelectric conversion unit. That is, the optical fiber housing portion can be fixed at the same position regardless of the presence or absence of the photoelectric conversion unit. For this reason, when only the communication function is desired, only the optical fiber housing portion can be easily housed in the housing. Moreover, when it is desired to add a photoelectric conversion unit later, this can be easily performed. Further, in order to make it easy to add the photoelectric conversion unit later, the detachable structure of the photoelectric conversion unit and the optical fiber housing portion with respect to the housing is also devised.

[II] Specific contents of the present embodiment Next, specific contents of the present embodiment will be described. 1 is a front view of an optical receiver according to the present embodiment, FIG. 2 is a bottom view of FIG. 1, FIG. 3 is a side view of FIG. 1, and FIG. 5 is a perspective view of the optical receiver in the opened state, FIG. 6 is an exploded perspective view of the optical receiver with the optical fiber tray removed, and FIG. 7 is the optical receiver of FIG. It is a disassembled perspective view in the state where the photoelectric conversion unit was further removed from. As shown in these drawings, the optical receiver 1 according to the present embodiment is configured such that an optical fiber tray 20 and a photoelectric conversion unit 30 are detachably accommodated in a housing 10. In the following description, the X direction in FIG. 5 is the left-right direction, the Y direction is the up-down direction, and the Z direction is the front-back direction.

(Outline of configuration of optical receiver 1)
Among these, the housing | casing 10 is a structure of the optical receiver 1, and is a protection means which protects the optical fiber tray 20 and the photoelectric conversion unit 30 from the outside. The housing 10 includes a substantially box-shaped base portion 11 and a lid portion 12 that is pivotally supported by the base portion 11 and is provided on one side of the base portion 11. The opening 11 a can be substantially covered with the lid 12. A pair of openings 13a and 13b for drawing an optical fiber (not shown) into the optical receiver 1 and a coaxial cable (not shown) are provided inside the optical receiver 1 on the bottom surface of the housing 10 thus configured. A pair of openings 14a and 14b for drawing are formed.

  As shown in FIG. 7, a photoelectric conversion space portion 15 a for accommodating the photoelectric conversion unit 30 and an optical fiber accommodation space portion 15 b for accommodating the optical fiber tray 20 are formed inside the housing 10. Has been. The photoelectric conversion space portion 15a and the optical fiber housing space portion 15b are space portions having shapes substantially corresponding to the photoelectric conversion unit 30 and the optical fiber tray 20, respectively. The photoelectric conversion space portion 15a is a rear position of the housing 10. The optical fiber housing space 15b is formed at a position ahead of the photoelectric conversion space 15a, and the photoelectric conversion space 15a and the optical fiber housing space 15b are arranged at positions where they do not overlap each other. .

  The optical fiber tray 20 is a component mainly responsible for a communication function, and fixes a mechanical splice (not shown) for connecting an outdoor optical fiber connected to each other and an optical fiber in a home. It functions also as a surplus length processing part for winding up the surplus length portion of the optical fiber and the in-house optical fiber, and corresponds to the optical fiber accommodation means in the claims. Schematically, the optical fiber tray 20 includes a pair of optical fiber fixing portions 21 a and 21 b, an optical fiber winding portion 22, and a splicer fixing portion 23.

  Then, the optical fiber drawn from the outside is fixed to one optical fiber fixing portion 21 a, and only the core wire of this optical fiber is introduced into the optical fiber winding portion 22. Similarly, the optical fiber drawn from the indoor is fixed to the other optical fiber fixing portion 21 b, and only the core wire of this optical fiber is introduced into the optical fiber winding portion 22. The cores of both optical fibers are connected to each other through a mechanical splice (not shown). This mechanical splice is fixed to the splicer fixing portion 23. Further, the extra length portions of these core wires are wound around the optical fiber winding portion 22.

  The photoelectric conversion unit 30 is a component mainly responsible for the broadcast function, and converts a broadcast optical signal transmitted via an outdoor optical fiber into an electrical signal. Corresponds to the conversion means. Specifically, this photoelectric conversion unit 30 is configured by providing a housing 31 with an input terminal 32, a photoelectric conversion circuit (not shown), and an output terminal 33.

  Then, the optical fiber drawn from outside is drawn through the optical fiber tray 20 as described above, and an optical signal output terminal (not shown) connected to the core wire is connected to the input terminal 32. The optical signal input through the input terminal 32 is converted into an electrical signal by the photoelectric conversion circuit, and transmitted to each device such as a home TV via a coaxial cable (not shown) connected to the output terminal 33. .

(Fixed structure of photoelectric conversion unit 30)
Next, details of the fixing structure of the photoelectric conversion unit 30 will be described. As shown in FIG. 4, a plurality of ribs 16 are formed on the base portion 11 of the housing 10. The rib 16 is for screwing the photoelectric conversion unit 30 to the base portion 11 and corresponds to the screw receiving means in the claims. Specifically, each rib 16 is a substantially columnar body molded integrally with the base portion 11, and a screw hole 16a is formed at a substantially central position on the plane. These ribs 16 are formed at positions substantially corresponding to the respective corners of the housing 31 of the photoelectric conversion unit 30, and fixing screws (not shown) are passed through the respective corners of the housing 31 from the front, and further screw holes. The photoelectric conversion unit 30 can be fixed to the housing 10 by combining with 16a.

  Moreover, the photoelectric conversion unit 30 can be locked with respect to the housing | casing 10 by using this rib 16, without using a fixing screw. FIG. 8 is a perspective view of the photoelectric conversion unit 30 as viewed from the rear side, and FIG. 9 is an enlarged cross-sectional view illustrating a state where the photoelectric conversion unit 30 and the rib 16 are locked. As shown in these drawings, the rib 16 is formed so as to protrude forward from the main surface of the base portion 11. On the other hand, a notch 34 is formed at each corner of the housing 31 of the photoelectric conversion unit 30 at a position and shape substantially corresponding to the protruding portion of the rib 16. Therefore, when the photoelectric conversion unit 30 is arranged in the photoelectric conversion space 15 a of the housing 10, the ribs 16 are locked to the notches 34 at the respective corners of the housing 31 of the photoelectric conversion unit 30, and the photoelectric conversion unit 30. Cannot be moved up, down, left or right. Accordingly, the photoelectric conversion unit 30 can be temporarily fixed to the housing 10, so that the photoelectric conversion unit 30 can be easily attached and detached. Furthermore, after this temporary fixing, by attaching the optical fiber tray 20 as will be described later, the photoelectric conversion unit 30 cannot be detached from the housing 10, so that it is possible to omit screwing with a fixing screw.

  That is, the rib 16 is for screwing the photoelectric conversion means, and corresponds to the screw receiving means in the claims, and the notch 34 is the one to which the rib 16 is substantially fitted. It corresponds to the fitting means in the range. In particular, since the locking structure is configured via the rib 16, the screw is fixed when screwing is necessary, and the screwing is omitted when screwing is unnecessary. The fixing can be performed, and a plurality of functions can be provided for screwing to eliminate the necessity of providing a dedicated locking structure, thereby reducing the manufacturing cost.

  The photoelectric conversion unit 30 is temporarily fixed to the housing 10 via the output terminal 33. That is, as shown in FIG. 8, two output terminals 33 for outputting an electrical signal to the coaxial cable are provided on the bottom surface of the photoelectric conversion unit 30 as described above. On the other hand, as shown in FIG. 7, openings 14a and 14b are formed on the bottom surface of the housing 10 at positions and shapes substantially corresponding to the output terminals 33. The output terminals 33 are connected to the openings 14a and 14b. The output terminal 33 can be protruded to the outside of the bottom surface of the housing 10 by being inserted. Accordingly, as shown in FIGS. 1 to 4, in a state where the output terminal 33 is protruded, it is impossible to move the photoelectric conversion unit 30 back and forth and right and left. As a result, the photoelectric conversion unit 30 can be temporarily fixed to the housing 10, and attachment / detachment work of the photoelectric conversion unit 30 is further facilitated.

(Fixed structure of optical fiber tray 20)
Next, details of the fixing structure of the optical fiber tray 20 will be described. The optical fiber tray 20 is detachably locked to the housing 10 on both upper and lower sides.

  First, the fixing structure above the optical fiber tray 20 will be described. 10 is an enlarged perspective view of the upper portion of the housing 10 and the optical fiber tray 20, FIG. 11 is an enlarged sectional view of the upper portion of the housing 10, and FIG. 12 is an upper portion of the housing 10 and the optical fiber tray 20. FIG. As shown in these drawings, a locking claw 17 that protrudes toward the inside of the housing 10 is integrally formed on the upper inner edge of the base portion 11 of the housing 10. Further, rail-like tray guides 18 for placing the upper end portion of the optical fiber tray 20 are provided on both the left and right sides of the locking claw 17. On the other hand, a notch 24 is formed at the outer edge of the upper end of the optical fiber tray 20 at a position and shape substantially corresponding to the locking claw 17.

  Therefore, when the optical fiber tray 20 is disposed in the optical fiber accommodating space 15b, the upper end portion of the optical fiber tray 20 is pressed against the elastic force of the locking claw 17 to the rear of the housing 10, thereby this light. At the same time that the locking claw 17 is locked to the notch 24 of the fiber tray 20, the upper end of the optical fiber tray 20 is placed on the front end surface of the tray guide 18. In this state, since the upper end portion of the optical fiber tray 20 is sandwiched between the locking claw 17 and the tray guide 18, movement in the front-rear direction is restricted, and the optical fiber tray 20 is fixed to the housing 10. be able to. Further, at the time of removal, the locking claw 17 is pressed upward against its elastic force, so that the locking claw 17 is released from the notch 24 and the optical fiber tray 20 can be easily removed from the housing 10. Can be removed.

  Next, a fixing structure below the optical fiber tray 20 will be described. 13 is an enlarged perspective view of a lower portion of the housing 10 and the optical fiber tray 20, FIG. 14 is an enlarged cross-sectional view of a lower portion of the housing 10, and FIG. 15 is a lower portion of the housing 10 and the optical fiber tray 20. FIG. As shown in these drawings, a pair of rail-shaped tray guides 19 are provided on the lower inner edge of the base portion 11 of the housing 10. The tray guide 19 has a notch 19a. The notch 19 a is a space that substantially corresponds to the thickness of the main surface 24 of the optical fiber tray 20. On the other hand, a notch 35 is formed on the outer edge of the lower end of the optical fiber tray 20 at a position and shape substantially corresponding to the tray guide 19.

  Therefore, when the optical fiber tray 20 is disposed in the optical fiber accommodating space 15b, the notch 35 at the lower end of the optical fiber tray 20 has a portion positioned forward of the notch 19a in the tray guide 19. Lock. At the same time, the main surface portion 24 of the optical fiber tray 20 is engaged with the notch portion 19 a of the tray guide 19, and the main surface portion 24 of the optical fiber tray 20 is placed on the tray guide 19. In this state, the lower end of the optical fiber tray 20 is restricted from moving rearward and left and right by the tray guide 19, and the optical fiber tray 20 can be fixed to the housing 10.

  Next, among the fixing structures of the optical fiber tray 20 described so far, a structure for enabling the optical fiber tray 20 to be fixed at the same position regardless of the presence or absence of the photoelectric conversion unit 30 will be described in more detail. As shown in FIGS. 11 and 14, when the distance from the front surface of the base portion 11 of the housing 10 to the front surface of the photoelectric conversion space 15 a (or the photoelectric conversion unit 30) is D, it is formed at the upper end portion of the housing 10. The distance D1 from the base portion 11 to the front end portion of the tray guide 18 and the distance D2 from the base portion 11 to the notch portion of the tray guide 19 formed at the lower end portion of the housing 10 are each greater than the distance D (D1). ≧ D, D2 ≧ D).

  Therefore, in a state where the upper end portion of the optical fiber tray 20 is placed on the tray guide 18 and a state where the lower end portion of the optical fiber tray 20 is placed on the tray guide 19, the optical fiber tray 20 is in the photoelectric conversion space. The entry into the portion 15a is restricted. For this reason, the optical fiber tray 20 can be fixed at the same position with the same structure regardless of whether or not the photoelectric conversion unit 30 is accommodated in the photoelectric conversion space 15a. Therefore, in the case where only the optical fiber tray 20 is accommodated in the optical receiver 1 and in the case where the photoelectric conversion unit 30 and the optical fiber tray 20 are accommodated, the optical fiber tray 20 can be fixed in the same procedure. Can be fixed easily and securely. From these things, the latching claw 17, tray guides 18 and 19, and the notch correspond to the optical fiber housing and fixing means in the claims. The tray guides 19a, 24, and 35 correspond to the restricting means in the claims.

  Further, by fixing the optical fiber tray 20 in this way, the photoelectric conversion unit 30 can be detachably fixed to the housing 10. That is, as described above, the photoelectric conversion unit 30 can be temporarily fixed without being screwed to the housing 10. However, when not screwed, there is a possibility that the photoelectric conversion unit 30 may drop out through the opening 11 a of the base portion 11 when the lid portion 12 is open. Here, in the present embodiment, the optical fiber tray 20 is disposed in front of the photoelectric conversion unit 30 (side closer to the opening 11a), and the optical fiber tray 20 is fixed to the housing 10. Thus, the optical fiber tray 20 serves as a stopper, and the photoelectric conversion unit 30 accommodated in the photoelectric conversion space 15a is prevented from dropping out of the opening 11a. For this reason, the necessity for screwing the photoelectric conversion unit 30 can be completely eliminated, and the photoelectric conversion unit 30 can be attached more easily.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention may be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Can do. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved. For example, even when the workability of housing the photoelectric conversion unit 30 is not different from the conventional one, the object of the present invention is achieved as long as the workability of housing the optical fiber tray 20 is slightly improved as compared with the prior art. .

(Configuration of optical fiber tray 20)
Various structures can be considered as the fixing structure of the optical fiber tray 20 in addition to the structure described above. For example, the optical fiber tray 20 may be screwed to the housing 10 at a position that does not interfere with the photoelectric conversion space 15a.

(Configuration of photoelectric conversion unit 30)
As the fixing structure of the photoelectric conversion unit 30, various structures other than the structure described above can be considered. For example, an elastically deformable claw portion may be provided on the peripheral surface of the rib 16 of the housing 10, and this may be detachably locked to the notch portion 34 of the photoelectric conversion unit 30.

  The optical receiver according to the present invention can be used when connecting a plurality of optical fibers for optical transmission services to each other, installed outdoors, etc., particularly when only the optical fiber accommodating means is to be used. It is also useful when adding photoelectric conversion means later.

(Appendix 1)
The optical receiver according to attachment 1 includes an optical fiber accommodating means for accommodating a plurality of optical fibers connected to each other, and a photoelectric conversion for converting an optical signal transmitted through the optical fiber into an electrical signal. And a photoelectric conversion space for accommodating the photoelectric conversion means in the housing. An optical fiber housing space for housing the optical fiber housing means in the housing; and the optical fiber housing space in the optical fiber housing space, and the optical fiber housing means is attached and detached at a position not in contact with the photoelectric conversion space. An optical fiber housing and fixing means for freely fixing is provided.

(Appendix 2)
The optical receiver described in appendix 2 is the optical receiver described in appendix 1, wherein the optical fiber housing fixing means includes a regulating means for regulating the optical fiber housing means from entering the photoelectric conversion space. It is characterized by having.

(Appendix 3)
The optical receiver according to appendix 3 is the optical receiver according to appendix 1 or 2, wherein the housing is provided with screw receiving means for screwing the photoelectric conversion means in the photoelectric conversion space, The photoelectric conversion means is provided with fitting means for substantially fitting the screw receiving means.

(Appendix 4)
The optical receiver according to appendix 4 is the optical receiver according to any one of appendices 1 to 3, wherein the photoelectric conversion means or the optical fiber housing means is taken in and out of the casing. By providing an opening for the optical fiber housing space, placing the optical fiber housing space closer to the opening than the photoelectric conversion space, and fixing the optical fiber housing means to the optical fiber housing space, The photoelectric conversion means accommodated in the photoelectric conversion space is not allowed to drop from the opening.

  According to this invention, since the optical fiber housing means can be detachably fixed at a position where it does not contact the photoelectric conversion space, the optical fiber housing can be fixed at the same position regardless of the presence or absence of the photoelectric conversion unit. Therefore, when only the communication function is to be used, only the optical fiber housing portion can be easily accommodated in the housing, and when it is desired to add a photoelectric conversion unit later, this can be easily performed. it can.

  According to this invention, since the screw receiving means is substantially fitted to the fitting means, the photoelectric conversion means can be fixed to the housing with the fitting structure using the screw receiving means. In this way, by using the screw receiving means for fixing the photoelectric conversion means, the screw is fixed when screw fixing is necessary, and the screw fixing is omitted when the screw fixing is unnecessary. It is possible to reduce the manufacturing cost by eliminating the necessity of providing a structure exclusively for locking by providing the screw receiving means with a plurality of functions such as fixing by the structure.

  According to this invention, since the photoelectric conversion means cannot be detached by fixing the optical fiber accommodation means, the optical fiber accommodation means can also function as a fixing means for the photoelectric conversion means, and the photoelectric conversion means can be screwed. The photoelectric conversion means can be attached and detached more easily.

DESCRIPTION OF SYMBOLS 1 Optical receiver 10, 31 Case 11 Base part 11a Opening part 12 Cover part 13a, 13b, 14a, 14b Opening part 15a Photoelectric conversion space part 15b Optical fiber accommodation space part 16 Rib 16a Screw hole 17 Locking claws 18, 19 Tray guide 19a, 24, 34, 35 Notch portion 20 Optical fiber trays 21a, 21b A pair of optical fiber fixing portions 22 Optical fiber winding portion 23 Splicer fixing portion 24 Main surface portion 30 Photoelectric conversion unit 31 Housing 32 Input terminal 33 Output Terminal

Claims (3)

An optical fiber accommodating means for accommodating a plurality of optical fibers connected to each other, and a photoelectric conversion means for converting an optical signal transmitted through the optical fiber into an electric signal, and an opening of the housing An optical receiver that is detachably accommodated inside the housing,
The housing is
A photoelectric conversion space for accommodating the photoelectric conversion means in the housing;
A space for accommodating the optical fiber accommodating means inside the housing, formed on the opening side of the housing relative to the photoelectric conversion space, and does not overlap with the photoelectric conversion space An optical fiber housing space disposed at a position;
In the optical fiber housing space, an optical fiber housing fixing means for detachably fixing the optical fiber housing means;
Screw receiving means capable of screwing the photoelectric conversion means in the photoelectric conversion space, and projecting toward the opening side of the housing; and
The photoelectric conversion means is a fitting means locked by the screw receiving means, and is formed in a position and shape substantially corresponding to the screw receiving means when the photoelectric conversion means is disposed in the photoelectric conversion space. Providing a fitting means,
An optical receiver characterized by. The screw receiving means is formed in a substantially cylindrical shape, and a screw hole is formed at a substantially central position in the plane.
The optical receiver according to claim 1. The screw receiving means is locked to the fitting means of the photoelectric conversion means, and it is impossible for the photoelectric conversion means to move in a direction substantially orthogonal to the protruding direction of the screw receiving means.
The optical receiver according to claim 1 or 2.

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