JP4312644B2 - Signal converter - Google Patents

Description

  The present invention relates to a signal conversion device that converts an optical signal transmitted through an optical fiber cable and an electrical signal.

Conventionally, Patent Document 1 and Patent Document 2 are known as a housing of a signal conversion device that performs signal conversion between an optical signal and an electrical signal. With the spread of FTTH services to general users in recent years, these signal conversion devices are increasingly installed in homes and the like.
JP 2002-258062 A JP 2004-63909 A

It is desirable that these signal converters can be easily opened and closed in consideration of the workability of the installer, but the possibility of the user disassembling and breaking down the signal converter after the installation is increased. The countermeasure is desired.
Further, in a signal conversion device of a so-called book type housing in which the housings are connected by a hinge, there is a possibility that the optical fiber cable is caught and damaged when the housing is closed.

The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a signal conversion device that can be easily opened and closed and has simple locking means.
Another object of the present invention is to provide a signal converter that prevents the optical fiber cable from being caught when the casing is closed.

(Invention of Claim 1)
The invention according to claim 1 is a signal conversion device that houses an optical fiber cable and a signal conversion device main body that converts an optical signal transmitted through the optical fiber cable and an electric signal, and an outer edge of a base surface is a side wall portion. Formed in the shape of a half-enclosed container surrounded by the first and second casings, which are connected to each other by hinges formed on the side wall portions, and formed inside the container of the first casing. A first engaging claw and a second engaging member formed inside the container of the second housing and engaged with the first engaging claw to hold the first housing and the second housing closed. And a lock key formed with a flange portion on the proximal end side of the shaft portion, and the shaft portion being rotatably fitted in the side wall portion of the first housing, In the state where the rotation position of the flange matches the predetermined release position, When the shaft is pressed at the release position, the shaft presses the first locking claw and releases the engagement of the first locking claw and the second locking claw. In addition, the shaft portion has a protrusion protruding in a direction perpendicular to the axis, and the second housing is erected corresponding to the position of the protrusion when the release position is matched, and A lock rib for abutting and rotating the lock key from the release position is provided on the inner side of the container, and the lock rib has a notch that allows the protrusion to move in the housing inner direction when the housing is closed. It is characterized by being formed .

According to the first aspect of the present invention, when the housing is opened, the engagement between the first engaging claw and the second engaging claw can be released by pressing the lock key in accordance with the release position .

In addition, when the casing is closed, the locking rib contacts the protrusion and the lock key is rotated from the release position, so that the lock key is not forgotten to be forgotten (moved from the release position) automatically.
(Invention of Claim 2 )
According to a second aspect of the present invention, in the first aspect of the present invention, the notch contacts the protrusion that matches the release position when the housing is opened, and the lock key is rotated from the release position. .

In the invention of claim 2, since the notch of the locking rib hooks the protrusion and the lock key is rotated from the release position when the housing is opened, the lock key is not forgotten to be prevented (moved from the release position) automatically. Done.
(Invention of Claim 3 )
According to a third aspect of the present invention, in the first or second aspect of the present invention, the notch is set to have a shape in which the protrusion can rotate in a normal rotation direction from the rib base end side to the release position. When the lock key is rotated in the reverse direction when the body is closed, the protrusion and the locking rib interfere with each other.

In the invention of claim 3 , the protrusion can be moved to the release position when the lock key is rotated in the forward rotation direction. On the other hand, when the lock key is rotated in the reverse direction, the protrusion interferes with the tip of the locking rib.
(Invention of Claim 4 )
According to a fourth aspect of the present invention, in the third aspect of the invention, the second casing is erected at a position facing the locking rib with the shaft portion interposed therebetween, and is in contact with the protrusion when the casing is closed. It further has a flexible rib that resists rotation of the lock key in the forward rotation direction.

In the invention of claim 4 , since the flexible rib resists rotation of the lock key in the forward rotation direction, the lock key does not rotate in the forward rotation direction due to slight vibration or the like and does not coincide with the release position .

( Invention of Claim 5 )
According to a fifth aspect of the present invention, there are provided a first casing and a second casing, each of which is formed in a half container shape in which the outer edge of the base surface is surrounded by a side wall portion, and is connected to be opened and closed by a hinge formed on the side wall portion. A housing, a signal converter main body that is housed in the second housing and converts between an optical signal and an electrical signal, an optical fiber cable having one end connected to the signal converter main body, and the first housing A cable surplus length processing portion formed on the base surface and capable of winding the optical fiber cable; and formed on the base bottom surface of the second casing, and the other end of the optical fiber cable is connected to the cable surplus length when the casing is opened. A cable guide that guides the processing section through a substantially S-shaped path, and a hinge side wall portion of either the first casing or the second casing, and sandwiches the optical fiber cable when the casing is closed. Fold to prevent A return portion, the a first locking claw formed in the container inside the first casing, is formed in the container inside the second housing, the first locking claw engaged with the first housing And a second locking claw for holding the closed state of the second housing, a flange portion is formed on the proximal end side of the shaft portion, and the shaft portion is rotatably fitted in the side wall portion of the first housing. The lock key is slidable inward of the housing in a state where the rotational position of the flange portion matches a predetermined release position, and the shaft portion is pressed at the release position. Then, the shaft portion presses the first locking claw, releases the engagement of the first locking claw and the second locking claw, and the shaft portion protrudes in a direction perpendicular to the axis. The second housing is erected corresponding to the position of the protrusion when the release position is matched, and is in contact with the protrusion when the housing is closed A lock rib for rotating the lock key from the release position is provided on the inside of the container, and the lock rib is formed with a notch for allowing the protrusion to move in the housing inner direction when the housing is closed. It is characterized by.

In the fifth aspect of the invention, the optical fiber cable is guided from the signal conversion device main body of the second housing to the cable surplus length processing section of the first housing along the cable guide, and is abbreviated with a predetermined curvature through which the optical signal can pass. It is routed in an S shape. Included Murrell Press fiber optic cable within the housing by a folded portion formed on the hinge side wall portion at the time of housing closed.

( Invention of Claim 6 )
According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the notch contacts the projection that matches the release position when the housing is opened, and the lock key is rotated from the release position. .

( Invention of Claim 7 )
According to a seventh aspect of the present invention, in the fifth or sixth aspect of the present invention, the notch is set in a shape that allows the protrusion to rotate in the forward rotation direction from the rib base end side to the release position. When the lock key is rotated in the reverse direction when the body is closed, the protrusion and the locking rib interfere with each other.

( Invention of Claim 8 )
The invention of claim 8 is the invention of claim 7 , wherein the second casing is erected at a position facing the locking rib across the shaft portion, and abuts the projection when the casing is closed. It further has a flexible rib that resists rotation of the lock key in the forward rotation direction.

In the present invention, since the casing includes the locking means using the lock key, the casing is not easily opened by the user after installation.
Moreover, in this invention, since the optical fiber cable arranged ranging over the 1st housing | casing and the 2nd housing | casing is pushed in in a housing | casing by a folding | turning part when a housing | casing closes, the possibility of damage to an optical fiber cable is suppressed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings (corresponding to the signal converters of claims 1 to 22).
(Configuration of signal converter)
The signal conversion device 1 according to the present embodiment includes a signal conversion device main body 2 that converts an optical signal and an electric signal, an optical fiber cable 3 that is connected to the signal conversion device main body 2 at one end, and a back surface of the signal conversion device main body 2. A protective cover 4 attached to the first housing 5, a first housing 5 and a second housing 6 for housing them, and a lock key 7 fitted into the first housing 5.

  The first housing 5 and the second housing 6 have base surfaces 5a and 6a each having a rectangular shape, and side walls 5b and 6b whose lower ends rise vertically from the outer edges of the base surfaces 5a and 6a, respectively. The side walls 5b and 6b of the respective casings 5 and 6 are formed so as to surround the outer edges of the base surfaces 5a and 6a, and the entire shapes of the respective casings 5 and 6 are each formed in a half container shape. The first casing 5 and the second casing 6 have base surfaces 5a and 6a formed in substantially the same shape, and side walls 5b and 6b on the long side of the base surface are connected by a hinge 8 so as to be opened and closed. .

When the hinge 8 is closed, the upper end surfaces of the side walls 5b and 6b of the first housing 5 and the second housing 6 are matched, and the housings 5 and 6 are closed to form a thin box-shaped container. It will be. The upper end of the side wall of the first housing 5 on the hinge mounting side is folded back toward the outside of the container (5c) so that the optical fiber cable 3 is not sandwiched between the housings when the housing is closed.
As shown in FIG. 3, leg ribs 9 and U-shaped ribs 10 are formed on the outsides of the containers of the first housing 5 and the second housing 6 as vertical legs. The leg rib 9 is formed on the side wall portion 5b on the hinge mounting side of the first housing 5 and extends from the upper end side to the lower end side of the side wall portion 5b. The U-shaped rib 10 is formed on the side wall 6b on the hinge mounting side of the second housing 6 and is formed in a U-shape that protrudes toward the lower end side of the side wall. The position of the U-shaped rib 10 corresponds to the position of the leg rib 9, and the leg rib 9 is set to fit into the center of the U-shaped rib 10 when the hinge 8 is opened. . When the hinge 8 is closed, the leg ribs 9 and the U-shaped ribs 10 function as the vertical legs.

  An attachment base 11 of the lock key 7 is formed on the side wall 5b on the short side of the bottom surface in the vicinity of the corner of the first housing 5 spaced from the hinge attachment side. The mounting base portion 11 is formed in a cylindrical shape whose axis is perpendicular to the side wall portion 5b. An inner wall 11a that is substantially horizontal to the side wall portion is formed on the depth side (inner side of the container) of the mounting base 11, and a circular opening is provided in the center of the inner wall 11a. A guide projection 12 that defines the release position of the lock key 7 is formed on the inner peripheral surface of the mounting base 11 (see FIG. 7).

  Here, the configuration of the lock key 7 will be described with reference to FIGS. The lock key 7 includes a cylindrical shaft portion 7a having a small diameter portion on the distal end side of the large diameter portion, a disk-shaped flange portion 7b formed on the proximal end side of the large diameter portion of the shaft portion 7a, and a flange portion 7b. The two retaining claws 7c project from the shaft forming surface. The shaft portion 7a is erected vertically from the center of the flange portion 7b, and includes a key-like protrusion 13 that protrudes in a direction perpendicular to the shaft on the base end side. The key-like protrusions 13 are formed on both sides of the shaft portion 7a so as to be linear with the shaft center therebetween. One key-like protrusion 13 is formed so that the tip side protrudes from the other key-like protrusion 13.

In addition, a guide groove 14 that engages with the guide protrusion 12 of the first housing 5 is formed on the outer edge portion of the shaft portion forming surface of the flange portion 7b. A groove 7d is formed on the rear surface side of the shaft portion forming surface of the flange portion 7b so that the lock key 7 can be easily rotated by pressing a coin or the like against the groove 7d.
The lock key 7 is fitted into the mounting base 11 of the first housing 5 from the outside of the container, and the shaft portion 7a and the key-like protrusion 13 are located inside the container through the opening of the inner wall 11a. The retaining claw 7c meshes with the inner wall 11a of the mounting base 11, so that the lock key 7 is pivotably retained. In addition, the lock key 7 is restricted from moving inward of the casing due to interference between the flange portion 7b and the guide projection 12 except at the release position. On the other hand, in a state where the guide protrusion 12 and the guide groove 14 of the flange portion 7b coincide with each other at the release position, the lock key 7 is slidable in the housing inner direction.

  As shown in FIG. 7, a first locking claw 15 is disposed on the inner side of the container of the first housing 5 on the axis of the shaft portion 7 a of the lock key 7. The first locking claw 15 includes a base portion 15a that rises vertically from the base surface 5a, an elastic deformation portion 15b that is formed by folding the tip of the base portion 15a into a U-shape on the mounting base side, and an elastic deformation portion 15b The claw portion 15c is formed at the end and outward in the long side direction of the basal plane, and the release piece 15d is formed below the claw portion 15c. A cutout corresponding to the small diameter portion of the shaft portion 7a is formed on the lower end side of the release piece 15d, and the stepped portions of the small diameter portion and the large diameter portion of the shaft portion 7a are in contact with the cutout of the release piece 15d. (See FIG. 9).

  In addition, a cable slit 16 for drawing the optical fiber cable 3 into the interior is formed on the side wall portion 5b on the short side of the base bottom surface of the first housing 5 substantially diagonally to the position of the mounting base portion 11. Furthermore, the engagement hole 17 is formed in the side wall part 5b of the base bottom long side facing the hinge attachment side. A guide piece 18 is formed at the upper end of the side wall 5b near the engagement hole 17 to guide the side wall 6b of the second housing 6 when the housing is closed.

  Further, as shown in FIGS. 4 and 5, a substantially cylindrical cable surplus length processing portion 19 is detachably attached to the base surface 5 a inside the container of the first housing 5. The cable surplus length processing unit 19 is fixed to the first housing 5 by hooks 20 and positioning ribs 21 provided on the base surface 5 a of the first housing 5. A plurality of hooking claws 19 a projecting in the outer peripheral direction are formed on the upper end side of the cable surplus length processing portion 19. On the outer peripheral side of the cable surplus length processing portion 19, a guide wall 22 having a hooking claw 22a protruding in the inner peripheral direction is erected so as to form a substantially elliptical shape. In the first housing 5, three wall hanging holes 23 are opened in the base surface 5 a in an isosceles triangular positional relationship.

On the other hand, as shown in FIG. 13, a second locking claw 24 is formed inside the container of the second casing 6 at a position corresponding to the first locking claw 15 when the casing is closed. The second locking claw 24 rises perpendicularly from the base surface 6a of the second housing 6, and a claw portion 24a that protrudes inward in the direction of the long side of the base surface is formed at the tip.
On the back side of the second locking claw 24 (on the side opposite to the direction of the claw portion 24a), a locking rib 25, a flexible rib 26, and a push-up piece 26a that are vertically raised from the base surface 6a are formed. The locking rib 25 and the flexible rib 26 are arranged so as to face each other with the position of the shaft portion 7a of the lock key 7 when the casing is closed. When the lock key 7 is not pressed, the rotating key-like protrusion 13 is set to abut against the locking rib 25 and the flexible rib 26 (see FIG. 14).

  The push-up piece 26a is disposed at a position corresponding to the lock key 7 and the mounting base 11 when the casing is closed. A part of the tip of the push-up piece 26a is notched in a step shape, and the notch is set so as to coincide with the mounting base 11. Further, the protruding portion of the push-up piece 26a is set so as to protrude to the opening of the inner wall 11a when the casing is closed, and the notch side of the tip of the protruding portion is chamfered. Therefore, when the lock key 7 is pressed, the retaining claw 7c of the lock key 7 comes into contact with the chamfered portion of the push-up piece 26a (see FIG. 10).

  Here, a notch 25a is formed near the tip of the locking rib 25 on the shaft side. The notch 25a corresponds to the release position of the key-like protrusion 13 when the casing is closed. When the lock key 7 matches the release position, the key-like protrusion 13 does not interfere with the lock rib 25. It can be moved inward of the body. This notch 25a is greatly notched toward the lower rib base end side, and only when the lock key 7 is rotated in the normal rotation direction from the rib base end side to the release position, the key-like protrusion 13 is formed. It can be moved to the release position. On the other hand, when the lock key 7 is rotated in the reverse rotation direction from the rib tip side to the release position, the key-like protrusion 13 interferes with the tip of the lock rib 25 (see FIG. 17).

The distal end of the flexible rib 26 can move in the direction perpendicular to the shaft portion due to elastic deformation. When the housing is closed, the distal end of the rib abuts on the key-like protrusion 13 of the lock key 7 so that the lock key 7 rotates in the forward direction. It resists rotation (see FIG. 18).
As shown in FIG. 1, a guide rib 27 that regulates the mounting position of the signal conversion device main body 2 and a hook 28 for fixing the signal conversion device main body 2 and the protective cover 4 to the base surface 6 a of the second housing 6. The signal conversion device main body 2 can be fixed to the second housing 6. The signal conversion device main body 2 is fixed so that the optical cable connector 2a faces the inside of the base surface 6a.

As shown in FIG. 1, the base surface 6 a of the second housing 6 is provided with a plurality of openings corresponding to the positions of the LEDs (not shown) of the signal conversion device main body 2. A light pipe 29 is attached to each of the openings, and the light of the LED that is turned on according to the state of the signal conversion device main body 2 is guided to the outside of the housing through the light pipe 29.
Furthermore, an inner peripheral wall 30 and an outer peripheral wall 31 corresponding to a cable guide are erected on the base surface 6a of the second housing 6 (see FIG. 4). The inner peripheral wall 30 and the outer peripheral wall 31 are arranged in a similar arc shape that protrudes toward the outer edge side of the base surface 6 a, and the distance between the inner peripheral wall 30 and the outer peripheral wall 31 is set to be slightly larger than the diameter of the optical fiber cable 3. ing. Therefore, the optical fiber cable 3 disposed between the inner peripheral wall 30 and the outer peripheral wall 31 is held by the second housing 6 in a state of being folded into a semicircular shape having a predetermined curvature.

  In addition, a slit corresponding to the electrical signal connector 2b of the signal conversion device main body 2 and a power cord slit 32 are formed in the side wall portion 6a on the short side of the bottom surface of the second housing 6 located on the near side in FIG. Has been. In the vicinity of the power cord slit 32, a power cord holding rib 34 is provided upright from the base surface 6a of the second housing 6 so as to sandwich and hold the power cord 33 (see FIG. 22). Further, auxiliary hooking claws 35 project from the side wall portion 6 b on the long side of the base surface facing the hinge mounting side of the first housing 6 at a position corresponding to the engagement hole 17.

(Operation and effect of signal converter)
The signal conversion device 1 of the present embodiment is configured as described above, and the operation and effect thereof will be described below along the assembly process and the housing opening process of the signal conversion device 1.
First, the hinges 8 of the first housing 5 and the second housing 6 are opened to open the housing, and the signal conversion device main body 2 and the protective cover 4 are attached to the second housing 6. Then, the power plug 33 a is inserted into the signal conversion device main body 2, the power cord 33 is sandwiched between the power cord holding ribs 34 and pulled out from the power cord slit 32. As shown in FIG. 21, since the power cord 33 is bent and held by the power cord holding rib 34 so as to be able to resist the external force in the pulling direction, the power plug 33a cannot be easily detached from the signal converter main body 2. Absent.

  Next, the optical fiber cable 3 is routed in the first housing 5 and the second housing 6, and one end of the optical fiber cable 3 is connected to the signal conversion device main body 2. When the signal conversion device 1 is wall-mounted, the screw 36 is inserted into the wall-hanging hole 23 of the first housing, and the signal conversion device 1 is fixed to the wall or the like (see FIG. 23). In addition, in the case of wall-hanging arrangement, screws may be secured by two wall-hanging holes 23.

  Here, the optical fiber cable 3 is guided from the signal conversion device main body 2 to one end side of the cable guides 30 and 31, and is folded back along the cable guides 30 and 31 in a semicircular shape with a predetermined curvature. The optical fiber cable 3 is guided to the cable surplus length processing unit 19 through a substantially S-shaped path across the side wall portions 5 b and 6 b on the hinge mounting side of the first housing 5 and the second housing 6. Therefore, the optical fiber cable 3 is routed in a substantially S shape with a predetermined curvature through which an optical signal can pass, and the optical fiber cable 3 can be compactly assembled in the housing. The optical fiber cable 3 is wound around the cable surplus length processing section 19 and its length is adjusted, and the other end of the optical fiber cable 3 is drawn out from the cable slit 16 along the side wall 5b on the hinge mounting side.

  Further, when the optical fiber cable 3 is routed, the cable surplus length processing unit 19 is removed from the first housing 5 and wound so that the worker can easily perform the routing operation. Further, the wound optical fiber cable 3 is hooked and held by a hooking claw 19 a of the cable extra length processing unit 19. Even if the optical fiber cable 3 is bent, the optical fiber cable 3 is latched and held by the guide wall 22 provided with the hooking claws 22a, and the optical fiber cable 3 is not separated in the housing.

And the hinge 8 of the 1st housing | casing 5 and the 2nd housing | casing 6 is closed, it is set as a housing | casing closed state, and the assembly of the signal converter 1 is completed. Here, when the casing is closed, the optical fiber cable 3 arranged between the casings 5 and 6 is pushed inward by the folded portion (5c) of the side wall portion 5b of the first casing 5, so that the optical fiber cable 3 Is not sandwiched between cases.
Further, when the housing is closed, the claw portion 15c of the first locking claw 15 and the claw portion 24a of the second locking claw 24 are engaged to hold the housing closed state. Here, when the operator closes the housing, the lock key 7 is rotated from the release position by the contact between the locking rib 25 of the second housing 6 and the key-like protrusion 13 (see FIG. 15). . Therefore, the engagement of the first locking claw 15 and the second locking claw 24 is not immediately released due to forgetting to lock.

When the casing is closed, the auxiliary locking claw 35 of the second casing 6 engages with the engagement hole 17 of the first casing 5, so that the first casing 5 and the second casing 6 are further strengthened. Engaged.
Further, as shown in FIG. 19, in the present embodiment, the cable slit 16 is positioned closer to the hinge mounting side, and the other end side of the optical fiber cable 3 is pulled out along the side wall portion 5b on the hinge mounting side. . For this reason, when the signal conversion device 1 is placed vertically with the vertically placed legs 9 and 10 formed on the side wall portions 5b and 6b on the hinge attachment side facing down, it is difficult for the cable to fall due to twisting of the cable. . That is, in this embodiment, since the optical fiber cable 3 is pulled out from the lower side when placed vertically, the twist of the cable when the signal conversion device 1 is raised is suppressed to the minimum. As shown in FIG. 20, when the optical fiber cable 3 is pulled out from the upper side when placed vertically, the optical fiber cable 3 is greatly twisted, and the signal conversion device 1a falls down due to the repulsive force of the outer sheath covering the cable. It becomes easy.

On the other hand, when opening the hinge 8 to open the housings 5 and 6, the operator first inserts a tool or the like into the engagement hole of the first housing, and the engagement hole 17 and the auxiliary locking claw 35. Release the engagement. Then, the operator rotates the lock key 7 in the forward rotation direction so that the guide groove 14 of the lock key 7 matches the guide protrusion 12 at the release position.
Here, when the lock key 7 is rotated in the reverse rotation direction, the key-like protrusion 13 interferes with the tip of the lock rib 25, so that the lock key 7 cannot be matched with the release position (see FIG. 17). . Further, since the flexible rib 26 of the second housing 6 resists the rotation of the lock key 7 in the forward rotation direction, the lock key 7 does not rotate when an external force exceeding a predetermined value is not applied in the forward rotation direction. No (see FIG. 18). Therefore, the possibility that the engagement of the first locking claw 15 and the second locking claw 24 due to slight vibrations is naturally released is remarkably suppressed.

  Next, the operator pushes the lock key 7 in the release position into the housing. Thereby, the shaft portion 7a of the lock key 7 presses the release piece 15d, the claw portion 15c approaches the base portion 15a, and the engagement of the first locking claw 15 and the second locking claw 24 is released. Further, the retaining claw 7c of the lock key 7 is guided by the chamfered portion of the push-up piece 26a and sinks below the push-up piece 26a, and urges the second housing 6 in the housing opening direction. Thereby, the 2nd housing | casing 6 is pushed up and the 1st housing | casing 5 and the 2nd housing | casing 6 do not close again (refer FIG. 10, FIG. 11).

  Then, the lock key 7 that has pressed the release piece 15d is urged toward the outside of the housing by the restoring force of the elastic deformation portion 15b, and returns to the original position. At this time, the claw portion 15c further pushes up the claw portion 24a of the second locking claw 24 (see FIG. 12). Even when the lock key 7 pushed back to the outer side of the casing when the casing is opened matches the release position, the notch 25a of the locking rib 25 hooks and moves the key-like protrusion 13 to move the lock key 7. It rotates from the release position (see FIG. 16).

  Through the above steps, the operator can open the hinge 8 to open the housing. In the signal conversion device 1 of the present embodiment, the casing is engaged by two engaging portions, and one engaging portion is provided with locking means by the lock key 7, so that the closed casing is naturally It will never be released.

  The present invention can be applied to a signal conversion device having an extra length processing section of an optical fiber cable inside a casing.

1 is an exploded perspective view of a signal conversion apparatus according to an embodiment. The perspective view which shows the assembly state of FIG. A perspective view of the signal conversion device when the housing is closed Perspective view showing the state of fiber optic cable routing The perspective view of the state which notched the side wall part of the 1st housing partly The figure which shows the state which removed the cable extra length process part in FIG. An enlarged perspective view of the vicinity of the mounting base of the first housing Lock key perspective view A longitudinal sectional view showing a state in which the lock key is attached to the first housing. Longitudinal sectional view showing the structure near the lock key when the housing is closed Longitudinal sectional view showing the structure near the lock key when the lock key is pressed Longitudinal sectional view showing the structure near the lock key after pressing the lock key An enlarged perspective view of the vicinity of the second locking claw of the second housing The top view which shows the positional relationship of the rib for locking and flexible rib, and a lock key The figure which shows the state which the rib for locking and protrusion contact | abut when a housing | casing closes The figure which shows the state where the projection is caught in the notch when the housing is opened The figure which shows the case where the lock key is rotated in the reverse direction when the housing is closed The figure which shows the case where the lock key is rotated in the forward rotation direction when the case is closed The figure which shows the state which puts a signal converter vertically with the side wall part by the side of a hinge attachment facing down The figure which shows the state which puts a signal converter vertically with the side wall part of a hinge attachment side facing up The perspective view which shows the attachment state of a power plug Top view showing how the power plug is installed The figure which showed an example which arranges the signal converter on the wall

Explanation of symbols

1, 1a Signal converter 2 Signal converter body 2a Optical cable connector 2b Electrical signal connector 3 Optical fiber cable 4 Protective cover 5 First housing 5a Base bottom surface 5b Side wall portion 5c Folding portion 6 Second housing 6a Base bottom surface 6b Side wall Part 7 lock key 7a shaft part 7b flange part 7c retaining claw 7d groove 8 hinge 9 leg rib (vertical leg)
10 U-shaped rib (vertical leg)
DESCRIPTION OF SYMBOLS 11 Mounting base part 11a Inner wall 12 Guide protrusion 13 Key-like protrusion 14 Guide groove 15 1st latching claw 15a Base part 15b Elastic deformation part 15c Claw part 15d Release piece 16 Cable slit 17 Engagement hole 18 Guide piece 19 Cable surplus length processing part 19a Hook Claw 20 Hook 21 Positioning Rib 22 Guide Wall 22a Hook Claw 23 Wall Hook Hole 24 Second Locking Claw 24a Claw Part 25 Lock Rib 25a Notch 26 Flexible Rib 26a Push-up Piece 27 Guide Rib 28 Hook 29 Light Pipe 30 Inner Wall (Cable guide)
31 Outer wall (cable guide)
32 Power cord slit 33 Power cord 33a Power plug 34 Power cord holding rib 35 Auxiliary locking claw 36 Screw

Claims (8)

A signal conversion device that houses an optical fiber cable and a signal conversion device main body that converts an optical signal and an electrical signal transmitted by the optical fiber cable,
A first casing and a second casing, each of which is formed in a half container shape in which the outer edge of the base surface is surrounded by a side wall portion, and is connected to be opened and closed by a hinge formed on the side wall portion;
A first locking claw formed inside the container of the first housing;
A second locking claw that is formed inside the container of the second housing and engages with the first locking claw to hold the closed state of the first housing and the second housing;
A lock key having a flange portion formed on the base end side of the shaft portion, the shaft portion being rotatably fitted in a side wall portion of the first housing,
The lock key is slidable inside the housing in a state where the rotational position of the flange portion matches a predetermined release position. When the shaft portion is pressed at the release position, the shaft portion is While pressing the first locking claw to release the engagement of the first locking claw and the second locking claw ,
The shaft portion has a protrusion protruding in a direction perpendicular to the axis,
The second housing has a locking rib which is erected corresponding to the position of the protrusion when the release position is matched, and abuts against the protrusion when the housing is closed to rotate the lock key from the release position. Have inside the container,
The signal converting device according to claim 1, wherein the locking rib is formed with a notch that allows movement of the protrusion in the housing inner direction when the housing is closed . The signal conversion device according to claim 1, wherein the notch contacts the protrusion that matches the release position when the housing is opened, and rotates the lock key from the release position . The notch is configured so that the protrusion can rotate in the forward rotation direction from the rib base end side to the release position, and when the lock key is rotated in the reverse rotation direction when the casing is closed, The signal conversion device according to claim 1 , wherein the protrusion and the locking rib interfere with each other . The second housing is erected at a position facing the locking rib across the shaft portion, and abuts against the protrusion when the housing is closed to resist rotation of the lock key in the forward rotation direction. The signal converter according to claim 3, further comprising a flexible rib . A first casing and a second casing, each of which is formed in a half container shape in which the outer edge of the base surface is surrounded by a side wall portion, and is connected to be opened and closed by a hinge formed on the side wall portion;
A signal conversion device main body housed in the second casing and performing conversion between an optical signal and an electrical signal;
An optical fiber cable having one end connected to the signal converter main body;
A cable surplus length processing section formed on the base surface of the first housing and capable of winding the optical fiber cable;
A cable guide that is formed on the base surface of the second housing and guides the other end side of the optical fiber cable to the cable surplus length processing section in a substantially S-shaped path when the housing is opened;
A folded portion that is formed on a hinge side wall of either the first housing or the second housing and prevents the optical fiber cable from being caught when the housing is closed;
A first locking claw formed inside the container of the first housing;
A second locking claw that is formed inside the container of the second housing and engages with the first locking claw to hold the closed state of the first housing and the second housing;
A lock key having a flange portion formed on the base end side of the shaft portion, the shaft portion being rotatably fitted in a side wall portion of the first housing,
The lock key is slidable inside the housing in a state where the rotational position of the flange portion matches a predetermined release position. When the shaft portion is pressed at the release position, the shaft portion is While pressing the first locking claw to release the engagement of the first locking claw and the second locking claw,
The shaft portion has a protrusion protruding in a direction perpendicular to the axis,
The second housing has a locking rib which is erected corresponding to the position of the protrusion when the release position is matched, and abuts against the protrusion when the housing is closed to rotate the lock key from the release position. Have inside the container,
The signal converting device according to claim 1, wherein the locking rib is formed with a notch that allows movement of the protrusion in the housing inner direction when the housing is closed . 6. The signal conversion device according to claim 5, wherein the notch contacts the protrusion that matches the release position when the housing is opened, and the lock key is rotated from the release position . The notch is configured so that the protrusion can rotate in the forward rotation direction from the rib base end side to the release position, and when the lock key is rotated in the reverse rotation direction when the casing is closed, The signal conversion device according to claim 5, wherein the protrusion and the locking rib interfere with each other . The second housing is erected at a position facing the locking rib across the shaft portion, and abuts against the protrusion when the housing is closed to resist rotation of the lock key in the forward rotation direction. The signal converter according to claim 7, further comprising a flexible rib .

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