JP2010145464A - Guide structure of optical cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guide structure of an optical cable in which the route correction of an optical cable with a cable clamp is eliminated. <P>SOLUTION: The guide structure of an optical cable includes a cable guide member of a resin molding which is formed in L-shape in planar view and a component to be mounted on which a cable guide member is engaged. The cable guide member includes: an inner peripheral wall which is erected at the inner peripheral part of the corner part bent in L-shape and formed with a curvature for keeping the radius of curvature of an abutted optical cable; an adapter mounting part formed at one end side of the cable guide member interposing a corner part; an outer peripheral wall which is erected at the outside peripheral part of the other end part of the cable guide member interposing the corner part and to which the optical cable is abutted; ejection prevention projected pieces which are provided at the upper parts of the inner peripheral wall and the outer peripheral wall respectively projecting inward for preventing the upward ejection of the optical cable; a correction guide rib which is provided projecting inward at the front end of the outer peripheral wall for correcting the route of the optical cable inward; and an engagement means which is freely attachable to and detachable from the component to be mounted, wherein the component to be mounted has a means to be engaged corresponding to the engagement means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical cable guide structure.

  In recent years, communication equipment terminal devices have been miniaturized, but optical cables need to ensure a radius of curvature of 30 mm or more in order to guarantee the characteristics (maintain the transmission of optical signals when bent).

And when the optical module is mounted inside the terminal device, when mounting the adapter for relay connection that connects the optical cable of the optical module and the external optical cable on the printed circuit board, the bracket is used and the curvature of the optical cable between them is used. In order to maintain the radius, as disclosed in Patent Document 1 and Patent Document 2, the route of the optical cable is corrected using a cable clamp, and the optical cable is mounted on a printed board.
Japanese Utility Model Publication No. 63-8705 JP 2007-58246 A

  However, the following problems have been pointed out for the conventional optical cable guide structure using the cable clamp and the relay connection adapter fixing structure using the metal fittings.

 [1] The size of the cable clamp is large, which hinders further miniaturization of the terminal device.

 [2] Since the conventional cable clamp is fixed at one point, it is difficult to hold the optical cable by rotating the cable clamp when holding the optical cable.

 [3] Since the cable clamp holds the optical cable with dots, multiple cable clamps are required to keep the optical cable route constant.

  As a result, a plurality of mounting holes are provided in the printed circuit board along the predetermined cable route, and the cable clamp is inserted into these holes, or the cable clamp is attached to the printed circuit board with double-sided tape, and the optical cable is inserted into the cable clamp. Therefore, it takes time for the work, and skill is required for the assembly work.

 [4] If a metal fitting is used to fix the adapter for relay connection to the printed circuit board, electrical wiring cannot be made to the mounting portion of the metal fitting, so that there is an inconvenience that an insulation treatment must be applied to the fitting portion of the metal fitting.

  The present invention has been devised in view of such circumstances, and eliminates the need for optical cable route correction by a conventional cable clamp, and at the same time, eliminates the need for a conventional metal fitting when installing a relay connection adapter, thereby improving workability. It is an object of the present invention to provide an optical cable guide structure that enables downsizing of a communication device terminal device.

  In order to achieve such an object, a guide structure for an optical cable according to claim 1 includes a cable guide member of a resin molded product formed in an L shape in plan view, a printed circuit board and a housing on which the cable guide member can be locked. An inner peripheral wall formed of a curvature that maintains the radius of curvature of the optical cable that is erected on the inner peripheral edge of the corner that bends in an L-shape And an adapter mounting portion formed on one end side of the cable guide member with the corner portion interposed therebetween, and an outer side that is erected on the outer peripheral edge portion on the other end side of the cable guide member with the corner portion sandwiched therebetween. An optical cable that protrudes inwardly at the tip of the outer peripheral wall, a protrusion for preventing the optical cable from protruding upward, and a protrusion for preventing the optical cable from protruding upward, respectively. The le A straightening guide rib for inwardly correcting the groove and a locking means detachably engageable with the mounted part, the mounted part including a locked means corresponding to the locking means, and the mounted An optical cable is mounted along the inner peripheral wall of the cable guide member locked to a component, and a connector attached to the optical cable is connected to a relay connection adapter attached to the adapter mounting portion.

  And the invention which concerns on Claim 2 is a guide structure of the optical cable of Claim 1, The said latching means bend | folds in cross-section L shape to the back surface side of the said adapter attachment part side edge part, A locking piece that protrudes from the distal end of the cable guide member along the outer peripheral wall, and a locking claw that protrudes from the distal end side of the cable guide member along the outer peripheral wall. The two small protrusions formed and two small protrusions for preventing rotation that protrude from the back side of the cable guide member near the adapter mounting portion. Each small protrusion is a locking hole for locking.

  Furthermore, the invention according to claim 3 is the optical cable guide structure according to claim 1 or 2, wherein the adapter mounting portion includes a support wall erected on the cable guide member, and an adapter for relay connection. And an engagement hole for engaging a lock claw provided on the relay connection adapter side is provided at the left and right peripheral edge portions of the insertion hole. According to a fourth aspect of the present invention, in the optical cable guide structure according to any one of the first to third aspects, a crown that is crowned upward on the upper portion of the support wall. A protruding piece that is locked to the concave portion of the wearing member is projected.

  According to the first aspect of the present invention, an optical cable can be mounted using a single cable guide member that can be easily attached to a mounted part such as a printed circuit board or a housing. Since the radius of curvature of the optical cable is maintained by the peripheral wall, the mounting work of the optical cable is less time-consuming and the skill of the operator is not required compared to the conventional case where the optical cable is mounted using a plurality of cable clamps. .

  And since the optical cable 7 can be mounted by one cable guide member compared with the conventional structure which used multiple cable clamps with a large external shape, the terminal device can be further miniaturized.

  In addition, since the correction guide rib provided on the cable guide member corrects the route of the optical cable inward, the optical cable guided to the cable guide member from the outer peripheral wall side does not bulge outward, and the housing or the like The optical cable is not pinched between. Further, the optical cable does not jump out from above the cable guide member due to the protrusion for preventing the protrusion.

  Furthermore, according to the first aspect of the present invention, since the adapter can be attached to the cable guide member, the conventional metal fitting is not required for attaching the adapter to the printed circuit board, and the number of parts can be reduced.

  In addition, conventionally, when a metal fitting is used to fix the adapter, electrical wiring cannot be performed on the mounting portion of the metal fitting. Therefore, there has been an inconvenience that the mounting portion of the metal fitting must be insulated. The conventional insulation process is not necessary, and the cable guide member is a resin molded product, and therefore has the advantage of not affecting the wiring of the printed circuit board.

  According to the second aspect of the present invention, the cable guide member can be easily attached to the mounted component such as a printed circuit board or a housing. According to the third aspect of the invention, the adapter to the cable guide member is provided. It has the advantage that it can be easily installed.

  According to the fourth aspect of the present invention, the protrusion provided on the support wall of the adapter mounting portion is engaged with the concave portion of the crowning member that is crowned upward, and the adapter mounting portion is pressed and held from above. Therefore, when an external optical cable is connected to the adapter, the adapter and the adapter mounting portion do not rattle even if force is applied to the adapter.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a guide structure according to an embodiment of claims 1 to 4. In FIG. 1, 1 is an optical module mounted on a printed circuit board (attached part) 3, and 5 is attached to the printed circuit board 3. In the present embodiment, the cable guide member uses the cable guide member 5 to correct the route of the optical cable 7 of the optical module 1 and connects the optical cable 7 and the external optical cable (hereinafter referred to as “adapter”). 9) is attached to the cable guide member 5.

  As shown in FIGS. 1 to 3, the cable guide member 5 is a resin molded product formed in an L shape in plan view, and has a radius of curvature of the optical cable 7 at the inner peripheral edge of the corner portion 11 that is bent in an L shape. The inner peripheral wall 13 having a curvature for maintaining the optical cable 7 is erected. When the optical cable 7 is mounted using the cable guide member 5, the optical cable 7 comes into contact with the inner periphery of the inner peripheral wall 13 as shown in FIG. ing.

  And the adapter attachment part 15 which can attach the adapter 9 by one-touch is provided in the one end side of the cable guide member 5 on both sides of the said corner | angular part 11. As shown in FIG.

  As shown in FIG. 2, the adapter mounting portion 15 includes a support wall 17 erected on the cable guide member 5 and a rectangular insertion hole formed in the support wall 17 along the outer shape of the adapter 9. 19 and an engaged portion (not shown) to which a lock claw described later is engaged is provided on the left and right peripheral edge portions on the back side of the insertion hole 19.

  On the other hand, as shown in FIGS. 1 and 9, a flange portion 21 having a rectangular cross section is provided on the outer periphery of the center of the adapter 9 over the entire periphery. Further, the thickness of the support wall 17 from the flange portion 21. A ratchet-shaped lock claw 23 is provided on the left and right side surfaces 9a, 9b of the adapter 9 with a gap therebetween. Then, as shown in FIG. 9, when the adapter 9 is inserted into the insertion hole 19 from the front side of the adapter mounting portion 15 (support wall 17) and the lock claw 23 is press-fitted into the insertion hole 19, the engagement portion is engaged. The support wall 17 is sandwiched from the front and rear by the combined lock claw 19 and the flange portion 21 so that the adapter 9 is mounted on the adapter mounting portion 15 with one touch.

  As shown in FIGS. 2 and 3, the cable guide member 5 is provided with a locking piece 25 that is bent in an L-shaped cross section toward the back side at the end of the adapter mounting portion 15. A locking claw 27 protruding inward is provided at the center of the front end of the locking piece 25. When the cable guide member 5 is attached to the printed circuit board 3 as shown in FIG. The cable guide member 5 is securely held on the printed circuit board 3 by being engaged with the rear surface side peripheral edge 29 of the circuit board 3.

  As shown in FIG. 1, a projecting piece 31 projects from the center of the upper portion of the support wall 17, and the projecting piece 31 is provided on a housing (crowning member) (not shown) that is worn on the printed circuit board 3. By engaging with the recessed portion, the adapter mounting portion 15 is pressed and held by the housing from above.

  On the other hand, as shown in FIGS. 1 and 2, an outer peripheral wall 33 with which the optical cable 7 abuts is erected on the outer peripheral edge portion on the other end side of the cable guide member 5 with the corner portion 11 interposed therebetween. Then, on the outer peripheral wall 33 and the upper part of the inner peripheral wall 13, protrusion protrusions 35 and 37 for preventing the optical cable 7 from protruding upward are respectively provided inwardly protruding from the cable guide member 5. A correction guide rib 39 for correcting the route of the optical cable 7 to the inside of the printed circuit board 5 protrudes inward from the tip of the outer peripheral wall 33.

  Further, as shown in FIGS. 2 and 3, on the back side of the cable guide member 5, first, along the outer peripheral wall 33, the tip of the tip is provided so that the cable guide member 5 can be attached to the printed circuit board 3. Two small protrusions 43 from which the locking claw 41 protrudes toward the adapter mounting portion 15 are provided with a predetermined interval.

  Further, two small protrusions 45 are provided on the rear surface on the adapter mounting portion 15 side, and these two small protrusions 45 have a function of preventing the rotation of the cable guide member 5 by supporting two points. Yes.

  As shown in FIG. 4, two locking holes 47 are formed in the printed circuit board 3 corresponding to the small protrusions 43, and two locking holes 49 are formed in the printed circuit board 3 corresponding to the small protrusions 45. When the small protrusions 43 are inserted into the respective locking holes 47 as shown in FIG. 4 and the cable guide member 5 is slid in the direction of the arrow in FIG. 5, the tip of the small protrusion 43 is engaged as shown in FIG. A stop claw 41 is engaged with the peripheral edge of the engagement hole 47. Then, when the locking piece 25 is pressed downward in this state (the state shown in FIGS. 6 and 7), the locking claw 27 is locked to the rear surface side peripheral portion 29 of the printed circuit board 3 as shown in FIG. The one end side of the cable guide member 5 is securely held by the printed circuit board 3, and at the same time, the small protrusion 45 is locked in the locking hole 49, and the cable guide member 5 is rotated or loosened on the adapter mounting portion 15 side. Is to be prevented.

  1, 51 is a connector connected to the optical cable 7, and in FIG. 2, 53 is the vicinity of the adapter mounting portion 15 along the inner peripheral edge of the cable guide member 5 from the inner peripheral wall 13. A peripheral wall 55 extends to the vicinity of the adapter mounting portion 15 along the outer peripheral edge of the cable guide member 5 from the outer peripheral wall 33, and both peripheral walls 53, 55 are connectors to the adapter 9. It is formed lower than the inner peripheral wall 13 and the outer peripheral wall 33 so as not to hinder the insertion of 51.

  The printed circuit board 3 and the cable guide member 5 used in this embodiment are configured in this way. Next, a mounting method of the cable guide member 5 will be described based on FIGS. 4 to 8, and an adapter will be described based on FIG. 9 and the mounting method of the optical cable 7 will be described with reference to FIGS.

  First, as shown in FIG. 4, the small protrusion 43 of the cable guide member 5 is inserted into the locking hole 47 of the printed circuit board 3. Next, the cable guide member 5 is slid in the direction of the arrow as shown in FIG. 5, and the locking claw 41 at the tip of the small protrusion 43 is locked to the peripheral edge of the locking hole 47 as shown in FIG.

  Then, when the locking piece 25 is pressed downward in this state (the state of FIGS. 6 and 7), the locking claw 27 is locked to the peripheral edge 29 on the back surface of the printed circuit board 3 as shown in FIG. The adapter mounting portion 15 side of the cable guide member 5 is held by the printed circuit board 3, and the small protrusion 45 is locked in the locking hole 49 so that the cable guide member 5 is positioned and fixed to the printed circuit board 3.

  In this way, the small protrusion 43 is inserted into the locking hole 47, the cable guide member 5 is slid, and the locking claw 27 is locked to the peripheral edge 29 on the back surface side of the printed circuit board 3. The cable guide member 5 is mounted on the printed circuit board 3.

  After that, as shown in FIG. 9, if the adapter 9 is inserted into the insertion hole 19 from the front surface of the adapter mounting portion 15 and the lock claw 23 is press-fitted into the insertion hole 19, the lock claw 19 and the flange portion 21 as described above. Thus, the support wall 17 is sandwiched from the front and rear, and the adapter 9 is attached to the adapter mounting portion 15.

  Then, as shown in FIG. 10, the optical module 1 is mounted on the printed circuit board 3, and the optical cable 7 is guided from the correction guide rib 39 side to the cable guide member 5, and below the protrusions 35 and 37 for preventing the protrusion. The connector 51 connected to the optical cable 7 is inserted into the adapter 9 as shown in FIG. 11, and the mounting of the optical cable 7 is completed.

  Thus, when the optical cable 7 is mounted using the cable guide member 5 in this way, as shown in FIG. 11, the inner peripheral wall 13 maintains the curvature radius of the optical cable 7 to guarantee the characteristics of the optical cable 7, The protrusions 35 and 37 for preventing protrusion prevent the optical cable 7 from protruding from above the cable guide member 5.

  Furthermore, as shown in FIG. 11, the optical cable 7 guided into the cable guide member 5 from the outer peripheral wall 33 side and abutting against the inner peripheral wall 13 is in contact with the outer peripheral wall 33 while drawing an arc. When 59 is not provided, the optical cable 7 guided by the cable guide member 5 from the outer peripheral wall 33 side bulges to the printed circuit board 3 side, and the optical cable 7 is sandwiched between the casing on which the printed circuit board 3 is mounted. There is a fear.

  Therefore, as described above, in the present embodiment, the correction guide rib 39 is protruded inward at the tip of the outer peripheral wall 33, and the route of the optical cable 7 is corrected inward by the correction guide rib 39, so that the outer peripheral wall is corrected. The optical cable 7 guided by the cable guide member 5 from the 33 side is prevented from bulging out to the side of the printed circuit board 3, thereby preventing the optical cable 7 from being sandwiched between the housing and the housing.

  Further, the projecting piece 31 provided on the support wall 17 of the adapter mounting portion 15 engages with a concave portion of a housing (not shown) that is attached to the printed circuit board 3 so that the adapter mounting portion 15 is pressed and held from above. Therefore, when an external optical cable is connected to the adapter 9, the adapter 9 and the adapter mounting portion 15 do not rattle even if a force is applied to the adapter 9.

Thus, according to this embodiment,
(1) The optical cable 7 can be mounted by using one cable guide member 5 that can be easily attached to the printed circuit board 3, and the radius of curvature of the optical cable 7 is maintained by the inner peripheral wall 13 of the cable guide member 5. Therefore, compared with the conventional case where an optical cable is mounted using a plurality of cable clamps, the mounting work of the optical cable 7 is not time-consuming and the operator is not required to be skilled.

 (2) Since the optical cable 7 can be mounted with one cable guide member 5 as compared with the conventional structure using a plurality of cable clamps having a large outer shape, the terminal device can be further miniaturized.

 (3) Since the correction guide rib 39 provided on the cable guide member 5 corrects the route of the optical cable 7 inward, the optical cable 7 guided by the cable guide member 5 from the outer peripheral wall 33 side swells toward the printed circuit board 3 side. The optical cable 7 is not sandwiched between the housing and the housing.

  Further, the optical cable 7 does not protrude from above the cable guide member 5 by the protrusions 35 and 37 for preventing protrusion.

 (4) Since the projecting piece 31 provided on the support wall 17 of the adapter mounting portion 15 engages with the concave portion of the casing that is attached to the printed circuit board 3, the adapter mounting portion 15 is pressed and held from above. When an external optical cable is connected to the adapter 9, the adapter 9 and the adapter mounting portion 15 do not rattle even if a force is applied to the adapter 9.

 (5) Since the adapter 9 can be attached to the cable guide member 5, when the adapter 9 is attached to the printed circuit board 3, a conventional metal fitting is not required, and the number of parts can be reduced.

  However, conventionally, when a metal fitting is used to fix the adapter, electrical wiring cannot be performed on the mounting portion of the metal fitting, so that there has been an inconvenience that the mounting portion of the metal fitting must be insulated. By using 5, the insulation treatment is not necessary, and the cable guide member 5 is a resin molded product, and therefore has an advantage that the wiring of the printed circuit board 3 is not affected.

  In the above-described embodiment, the structure in which the cable guide member 5 is mounted on the printed circuit board 3 has been described. However, it is needless to say that the embodiment can be applied to the case where the cable guide member 5 is attached to the housing.

It is a whole perspective view of the guide structure of the optical cable which concerns on one Embodiment of Claims 1 thru | or 4. It is a whole perspective view from diagonally upward of a cable guide member. It is a whole perspective view from the slanting lower part of a cable guide member. It is explanatory drawing of the mounting method of a cable guide member. It is explanatory drawing of the mounting method of a cable guide member. It is explanatory drawing of the mounting method of a cable guide member. It is explanatory drawing of the mounting method of a cable guide member. It is explanatory drawing of the mounting method of a cable guide member. It is explanatory drawing of the mounting method of an adapter. It is explanatory drawing of the mounting method of an optical cable. It is explanatory drawing of the mounting method of an optical cable.

Explanation of symbols

1 Optical Module 3 Printed Circuit Board 5 Cable Guide Member 5
7 Optical cable 9 Adapter 13 Inner peripheral wall 15 Adapter mounting portion 17 Support wall 19 Insertion hole 21 Hook 23 Lock claw 25 Locking piece 27, 41 Locking claw 31 Projection piece 33 Outer peripheral wall 35, 37 Projection piece 39 for preventing popping out Correction guide rib 43, 45 Small protrusions 47, 49 Locking hole 51 Connector

Claims (4)

A cable guide member of a resin molded product formed in an L shape in plan view;
The cable guide member consists of a printed circuit board and a mounted part such as a housing that can be locked.
The cable guide member is erected on the inner peripheral edge of the corner that bends in an L shape, and has an inner peripheral wall formed with a curvature that maintains the radius of curvature of the optical cable that abuts.
An adapter mounting portion formed on one end side of the cable guide member across the corner portion,
An outer peripheral wall that is erected on the outer peripheral edge on the other end side of the cable guide member across the corner portion, and in which the optical cable abuts
A protruding piece for preventing the protrusion of the optical cable that protrudes inwardly on the inner peripheral wall and the upper portion of the outer peripheral wall, respectively,
A correction guide rib that protrudes inward at the tip of the outer peripheral wall and corrects the route of the optical cable inward;
It is provided with a locking means that is detachable from the attached part,
The mounted component includes a locked means corresponding to the locking means,
An optical cable is mounted along the inner peripheral wall of the cable guide member locked to the attached part,
An optical cable guide structure, wherein a connector attached to the optical cable is connected to a relay connection adapter attached to the adapter mounting portion. The locking means is a lock in which a locking claw that is bent in a L-shaped cross section toward the back surface side of the adapter mounting portion side end, and that locks to the peripheral edge of the back surface side of the mounted component at the tip. With a piece,
Two small protrusions projecting on the back side of the cable guide member along the outer peripheral wall and having a locking claw formed at the tip;
It consists of two small protrusions for preventing rotation, which are provided on the back side of the cable guide member near the adapter mounting portion.
2. The guide structure for an optical cable according to claim 1, wherein the means for locking the attached part is a locking hole for locking the small protrusions.   The adapter mounting portion includes a support wall erected on the cable guide member and insertion holes provided in the support wall along the outer shape of the relay connection adapter. 3. An optical cable guide structure according to claim 1, further comprising an engaged portion that engages with a lock claw provided on the relay connection adapter side. The optical cable according to any one of claims 1 to 3, wherein a projecting piece is provided on an upper portion of the support wall to be engaged with a concave portion of a crowning member that is crowned upward. Guide structure.

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