JP7408477B2 - communication equipment - Google Patents

Description

The present invention relates to communication equipment equipped with an optical network unit (ONU) installed therein.

Patent Document 1 describes that an SFP type optical line termination device is installed in HGW (Home Gate Way), which is a communication device. An SFP (Small Formfactor Pluggable) is a type of optical module, ie, an optical transceiver, that mutually converts electrical signals and optical signals. SFP transceivers are small, hot-swappable optical transceivers that connect optical cables used for telecommunications and data transfer to communication equipment. As an upgraded version of SFP, SFP+ is also known, which has almost the same module dimensions and appearance, but supports high speeds from 1 Gbps to a maximum of 10 Gbps. The dimensions, appearance, and electrical specifications of SFPs are standardized through standards agreement among manufacturers under the auspices of the Small Form-Factor Committee, and numbers such as SFF-xxxx are added to the standard name. There is. For example, SFF-8432 Specification for SFP+ Module and Cage Rev 5.1 August 8, 2012 is known.

As an SFP type optical line termination device, a small optical line termination device is known that can be inserted into and removed from a cage connector on an electronic circuit board by rotating a lock release/extraction lever provided around an optical cable socket. For example, an SFP type optical line termination having a pull-out bar (i.e., a lock release pull-out lever) that can be unlocked and pulled out without using a tool when pulling out the SFP type optical line termination unit from a mounted device as a locking mechanism. The device is known (Small ONU Detailed Interface Specifications and Required Specifications for Mounted Devices, Edition 1.1, Nippon Telegraph and Telephone East Corporation, Table 1.1 Small ONU Interface Specifications, Figure 1.3 (Reference) Small (See example shape of ONU pull-out bar structure.)

Japanese Patent Application Publication No. 2016-036096

However, with the conventional technology, when an SFP type optical line termination device is installed in a communication device and shipped, there is a problem that a malicious user can pull out the SFP type optical line termination device from the communication device and steal it. .

The present invention has been made in view of the above-mentioned conventional problems.In the present invention, the SFP type optical line terminating device is exposed through the opening of the communication equipment, and the user intentionally inserts the SFP type optical line terminating device outside the communication equipment. The purpose is to provide communication equipment that can prevent unauthorized access.

The communication device of the present invention includes a communication device housing in which an optical line termination device is installed, which can be inserted into and removed from a cage connector on an electronic circuit board by rotating an unlocking lever provided around an optical cable socket. In the communication device, an opening through which an optical cable plug connected to the optical cable socket is passed is provided in a wall of the communication device housing, and an edge of the opening in the wall and the optical line termination device are connected to the optical line terminal device. The lock release lever is inserted into the cage connector and is installed between the lock release pull lever and the lock release pull lever in a state in which the optical cable plug is inserted into the communication device housing. It is characterized by having a protrusion that stops the rotation at a position where it is not unlocked.

According to the present invention, when an SFP type optical line termination device (hereinafter also referred to as SFP type ONU) is installed inside a communication device, the SFP type ONU is directly exposed in the communication device opening, but cannot be pulled out from the communication device. The above-mentioned problems can be solved, and it is also possible to prevent the SFP ONU from coming off due to impact or the like when a communication device equipped with an SFP ONU is dropped, falling outside the communication device, and being lost.

1 is a schematic perspective view showing a communication device equipped with an SFP type ONU according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing an SFP type ONU in this embodiment. FIG. 2 is a schematic perspective view showing the SFP cage in this example. Inserting the SFP type ONU in this example into the SFP cage (before insertion (Figure 4(a)), before insertion (Figure 4(b)), after insertion (Figure 4(c)), and removing it from the SFP cage. 4(d) is a schematic partial cross-sectional view showing the state just before (FIG. 4(d)). FIG. 2 is a sectional view showing a part of a cross section cut along line VV shown in FIG. 1; FIG. 2 is a partial front view of the communication device opening in the Z direction intersecting line UU shown in FIG. 1;

Embodiments of the present invention will be described below with reference to the drawings. Note that, in the embodiments, components having substantially the same functions and configurations are designated by the same reference numerals and redundant explanation will be omitted.

FIG. 1 is a schematic perspective view showing a communication device 10 equipped with an SFP type optical line termination device according to an embodiment of the present invention. The communication device 10 is a communication device 10 that has an SFP type ONU 14 mounted on an electronic circuit board 13 inside a housing 12 thereof. For convenience of explanation, as shown in the figure, the direction of each axis of the orthogonal XYZ coordinate axes is assumed to be the XYZ direction, the insertion/extraction direction of the optical cable 9 is assumed to be the Z direction (rear front direction), and the left and right (as seen from the plug insertion direction of the optical cable 9) (X direction) and up and down (Y direction). The optical cable 9 is, for example, an optical cable having an optical cable plug 9a of the interface type SC plug, and is inserted and connected to the socket of the SFP type ONU 14.

The housing 12 includes a base case 12T and a cover case 12V, which are fitted together to maintain an internal space. In the housing 12, an SFP ONU 14 is connected and mounted on an electronic circuit board 13 fixed to an internal base case 12T.

Mounted on the electronic circuit board 13 are an SFP electrical connector 15 that connects to the SFP ONU 14, and an SFP cage 16 that serves as a guide and a holding function when the SFP ONU 14 is connected. On the electronic circuit board 13, other devices (not shown) having optical signal conversion and control functions for functioning as the communication device 10 are also mounted.

[SFP type optical line termination equipment]
FIG. 2 is a schematic perspective view showing the SFP type ONU 14 in this embodiment. FIG. 3 is a schematic perspective view showing the SFP cage 16 in this embodiment. FIG. 4 shows how the SFP type ONU 14 is inserted into the SFP cage 16 (before insertion (FIG. 4(a)), before insertion (FIG. 4(b)), after insertion (FIG. 4(c)), and from the SFP cage 16. FIG. 4 is a schematic partial cross-sectional view showing the state immediately before removal (FIG. 4(d)).

The SFP type ONU 14 is composed of a port section 14P equipped with an optical cable socket SKT at the leading edge of the front end, and a main body connection section 14R (having an electrical connection pin at the rear end) at the rear end. The main body connection part 14R has an electronic circuit board (not shown) that converts the optical signal from the optical cable socket SKT into a digital signal, and supplies the digital signal to the electronic circuit board 13 via the electrical connection pin and the SFP electrical connector 15. do.

As shown in FIG. 2, an example of the external dimensions of the port section 14P of the SFP ONU 14 is as listed below.
Specified location………………………………………………………………Size [mm]
Length of port part 14P 14PA………………………………30.00 ± 1.00
Width 14PD of port portion 14P………………………………13.40~14.00
Main height of port part 14P 14PS………………………………8.55 ± 0.15
Extended height 14PL above the main height of the port section 14P...1.80 to 2.10
Lower extended height 14PAK of main height of port part 14P…………1.40 ±0.50
In addition, the notation of each specified place approximately corresponds to each item of SFF-8432 TABLE4-3 Designator. The length 14PA of the port portion includes the width (outer dimension in the Z direction) of the lock release pull-out lever LV. The annular handle-shaped unlocking lever LV surrounding the optical cable socket SKT of the port portion 14P is parallel to the XY plane and allows the optical cable plug 9a to pass therethrough.

[Lock mechanism & unlock mechanism]
The SFP type ONU 14 is inserted into the SFP cage 16 from the main body connection part 14R at the rear end, and the port part 14P at the front end is removably fixed (locked) to the SFP cage 16.

The locking mechanism of the SFP type ONU 14 to the SFP cage 16 includes a holding post RP that protrudes downward provided on the bottom surface of the port section 14P or main body connection section 14R shown in FIG. This is achieved by being configured to fit into a locking hole TBH formed in the middle of the tab portion TB in the form of a leaf spring.

The unlocking pull-out lever LV of the port portion 14P is a part of the unlocking mechanism ALM for separating the holding post RP of the locking mechanism from the locking hole TBH by its rotation. As shown in FIG. 4(d), the lock release pull lever LV is provided at the lower end around the optical cable socket SKT by a pair of pivot pins PVP having a pivot axis parallel to the X direction, and is in a lockable state (XY plane It is configured to be rotatable by 90 degrees between a state (parallel to the XZ plane) and an unlockable state (a state parallel to the XZ plane). For example, the unlocking mechanism ALM moves the wedge member WDG between the lower surface of the port portion 14P or the main body connecting portion 14R and the SFP by lowering and rotating the upper end of the unlocking pull-out lever LV with a finger or the like to the unlockable state. It is inserted between the tab portions TB of the cage 16. As a result, the holding post RP of the port portion 14P or the main body connection portion 14R and the tab portion TB of the SFP cage 16 are disengaged and unlocked.

[Unlock prevention mechanism]
FIG. 5 is a cross-sectional view showing a part of the cross section taken along line VV shown in FIG. The unlock prevention mechanism is a protrusion PTS on the cover case 12V located between the edge of the wall opening 12M and the lock release pull-out lever LV, as shown in FIG. The protrusion PTS is arranged on the opposite side of the optical cable socket SKT with respect to the unlocking pull-out lever LV. The protrusion (rib) PTS has its upper end not obstructing the passage of the optical cable plug 9a and is in a position where the rotation of the lock release pull-out lever LV is not unlocked (the state where the lock release pull-out lever LV is non-parallel to the XZ plane). It is erected on the cover case 12V so as to be stopped. The protrusion (rib) PTS may be formed on another housing wall that intersects with the housing wall in which the opening 12M is provided.

For example, if a user intentionally tries to pull out the SFP ONU 14 from the communication device 10 and uses a wire or the like, the lock release lever LV of the SFP ONU 14 may be operable, but the dimensions A and D shown in FIG. By satisfying the conditions , E, and F, it is possible to prevent the SFP type ONU 14 from being drawn out from the communication device 10 .

An example of the necessary conditions for the dimensions of A, D, E, and F is shown below.
A>5mm, D>0.5mm, E>0mm, F<3mm,
A: Distance that the front surface of the SFP type ONU 14 is recessed from the front surface of the edge of the opening 12M (Z direction),
D: difference distance in the Y direction between the upper end surface of the lock release pull lever LV of the SFP type ONU 14 and the lowest surface of the upper edge of the opening 12M of the housing 12;
E: Difference distance in the Y direction between the lower end surface of the SFP type ONU 14 and the upper end surface of the protrusion (rib) PTS of the cover case 12V,
F: Recessed distance (Z direction) from the rear end surface of the protrusion (rib) PTS of the cover case 12V to the front end surface of the SFP type ONU 14.

In addition, if a user attempts to release the lock with his or her finger using the lock release pull-out lever LV of the SFP type ONU 14, the dimensional conditions of the casing 12 around the SFP type ONU 14 that can prevent the user from releasing the lock with their finger are shown in the figure. 5, shown in Figure 6.

An example of necessary conditions for dimensions A and D shown in FIG. 5 and dimensions B and C shown in FIG. 6 is as follows.
A>5mm, B<2mm, C<8mm, D>0.5mm
B: Gap size in the Y direction where the upper end surface of the lock release pull lever LV of the SFP type ONU 14 is visible from a part of the upper edge of the opening 12M of the housing 12 (gap in the thickness direction of the finger when inserting the finger) size),
C: Gap size in the X direction where the upper end surface of the lock release pull lever LV of the SFP ONU 14 is visible from a part of the upper edge of the opening 12M of the housing 12 (gap size in the width direction when inserting a finger).

According to this embodiment, the structure is such that the user cannot touch the SFP ONU 14 due to the protrusion (rib) PTS of the unlock prevention mechanism, so the user may accidentally remove the SFP ONU 14 from the communication device 10. This has the effect of preventing troubles such as damage or loss of the SFP type ONU 14 after being put away or removed by mistake.

Furthermore, even if the user intentionally tries to pull out the SFP type ONU 14 outside the communication device 10 using a tool such as a wire, the above-mentioned unlock prevention mechanism prevents the SFP type ONU 14 from being pulled out outside the communication device 10, thereby preventing communication. This is effective in preventing damage to the device 10 and preventing the SFP ONU 14 from being stolen.

9 Optical cable 9a Optical cable plug 10 Communication equipment 12 Housing 12T Base case 12V Cover case 12M Opening 13 Electronic circuit board 14 SFP type ONU
14P Port section 14R Main body connection section 15 SFP electrical connector 16 SFP cage SKT Optical cable socket LV Unlocking lever RP Holding post TB Tab section TBH Locking hole ALM Unlocking mechanism PVP Pivot pin PTS Projection section (rib)
WDG wedge parts

Claims (3)

A communication device equipped with a communication device casing in which an optical line termination device is installed inside and can be inserted into and removed from a cage connector on an electronic circuit board by rotating an unlocking/extracting lever provided around an optical cable socket,
An opening through which an optical cable plug connected to the optical cable socket is passed is provided in a wall of the communication equipment housing,
The optical cable is inserted between the edge of the opening of the wall and the unlocking lever when the optical line termination device is inserted into the cage connector and mounted inside the communication equipment housing. A communication device comprising a protrusion that is erected without obstructing the passage of a plug and that stops the rotation of the lock release/pulling lever at an unlocked position. 2. The communication device according to claim 1, wherein the protrusion is disposed on the opposite side of the optical cable socket with respect to the unlocking pull-out lever. 3. The communication device according to claim 1, wherein the protrusion is formed on a wall of the communication device housing that intersects with the wall in which the opening is provided.

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