Patent Description:
The ports of a communication equipment to send signals to and receive signals from the external lines, such as electrical cables or optical cables, are generally formed by pluggable electronic or optoelectronic modules. These modules are, at any time, readily mounted into or unmounted from the mounting slots, or called mounting cages, of the equipment's communicating units in the way of direct plugging in and unplugging. The end of the module which is plugged into, to be called the rear end, establishes the contact connections with the interior electrical interface of the communication equipment; the other end of the module, called the front end, forms the communication port of the equipment on its panel, which is to connect to various kinds of electrical or optical cables that are with relevant, standardized connectors, or, the cables connection on a module is of a permanent nature, where cables are to be removed together with the modules.

With regard to the mounting and unmounting of the pluggable module in the communication equipment, a key issue is that not only should a stable connection between the dense electrical interfaces of the module mounted and the equipment be guaranteed, as to prevent signal loss or line failure due to dislocations or accidental removal of the module under work, but also, apart from that, the module shall be conveniently removed from the equipment whenever it's so needed. This is called the locking and unlocking issue of the pluggable modules.

Regarding the locking of the pluggable modules, the basic ways of locking are agreed upon within the industry as represented by associated protocols and standards, as to maintain product compatibilities between modules and equipments. <FIG> shows, with respect to a type of pluggable module <NUM>' which is among the main kinds, its basic way of locking in a mounting cage <NUM> of an equipment, as defined in the industry and in the related protocols and standards. In this locking, an inwardly bent leaf spring <NUM> facing toward the rear of the mounting cage <NUM> is provided on each side of the mounting cage <NUM>, whereas the casing of the pluggable module <NUM>', at its both sides, provides a kind of locking step surface structure facing toward the cage leaf spring <NUM>, such as the locking step surface <NUM>' illustrated in <FIG>. When the module <NUM>' is inserted into the mounting cage <NUM>, upon arrival of the module locking step surface <NUM>' at the cage leaf spring <NUM> position, the leaf spring <NUM> gets loose downward and butts against the locking step surface <NUM>', by which the locking of the module <NUM>' in the mounting cage <NUM> is formed. This locking position also corresponds to the innermost position that the module <NUM>' is inserted to in the mounting cage <NUM>. At this stage, the module can no longer move back or get pulled out, thus the steady interface connection between the module and the equipment is realized.

The above defined basic way of the locking, determines the basic way of the unlocking for the module <NUM>': it is to render the module <NUM>' on its own a certain operation mechanism such that when it needs to be removed, the mechanism can apply and raise up the mentioned leaf springs <NUM> on both sides of the mounting cage <NUM>, separating the leaf springs <NUM> from the locking step surfaces <NUM>' such as of <FIG> on both sides of the module <NUM>', after which the locking to the module is released and the module can be pulled out. Among the prior unlocking mechanisms utilized in the modules of this field in the industry, with respect to the said type of pluggable module <NUM>', a movable bulge structure with a defined ramp surface is usually adopted, as the unlocking bulge <NUM>' shown in <FIG>, whose unlocking operation mechanism is: to make the unlocking bulge <NUM>' on the module <NUM>' move toward the leaf spring <NUM> under a given unlocking operation so as to raise the leaf spring <NUM> up by its ramp surface, obtaining the unlocking of the module <NUM>'.

Under the basic way of unlocking described above, the unlocking operation mechanisms already utilized in the industry are divided into two fundamental types: one is the rotation bail type, where the bail is fixed onto the front end of the module and can rotate about the fixing position, and this rotation, through mechanical linkage, turns to the drive that leads an unlocking element on the sides of the casing into back and forth movements with the unlocking bulge <NUM>' set at the end, thus realizing the above unlocking, plus resetting, typical structure of which being shown in a representative patent <CIT>; the other is the direct-pull type, where its unlocking element on the sides of the module with the unlocking bulge <NUM>' at its end is driven toward the leaf spring <NUM> by direct outward pulling of a flat bail in the horizontal direction, realizing the unlocking while at the same moment pulling the module out, after which a spring mechanism arranged in the module renders the unlocking element backward, i.e., the reset, in an automatic way, typical structure of which being shown in a representative patent <CIT>. <CIT> discloses an optical module which comprises a handle, a casing body, an unlocker and a rotating shaft. When the handle contacts the limiting part of the unlocker, the unlocker rotates around the rotating shaft through a rotating part, and the locking part of the unlocker moves away from the casing body to achieve locking. When the handle contacts the braking part of the unlocker, the handle drives the braking part to move, and the unlocker rotates in the other direction by using the rotating shaft. The locking part moves in the direction of the casing body to unlock.

A most hindering issue of the rotation bail in its applications is the inability to perform the module plug-in and unplug with the cable attached: under this form, the cable connected to the module needs to be removed beforehand, otherwise the bail's unlocking operation by the rotation can not be applied due to the obstacle of the cable. This is rather inconvenient to plug and unplug implementations of the module, whereas for the sorts of the permanent, pigtailed connection types, such as the active optical cable, this form of operation can not be applied at all. As for the direct-pull, a defect is present that lies in the deficiency in its control of the unlocking status: due to that the module unlocking and pull-out are the same operation as pulling the bail outwardly, therefore no matter whether it is really needed or not in pulling the module out, the signal goes off because of the module dislocation that has already taken place under the module unlocking operation. This defect in the operation mechanism renders the direct-pull vulnerable as inducing possible misoperations in its implementation, such as unintentional engagements with the bail, or mistakenly unlocking a wrong line while it's too late, both of which result in a line failure. At the same time, the direct-pull is also hard to realize in-situ resetting, i.e., to recover the module from the unlocked status back to the locked status when the module has not been pulled out after its unlocking operation, during which the line is not affected. The root reason of these issues of the direct-pull hence lies in its lack of relevant control of the unlocked status and the procedure. As for the rotation bail, due to that the cables need to be removed first before the unlocking, the aforementioned rotation bail type naturally does not possess an in-situ reset function.

This invention provides an unlocking structure and an operating method for pluggable modules, aiming firstly at resolving the issue present in the rotation bait type where modules can't be plugged and unplugged with cable attached, by providing a solution that comes to be universally adaptable in the unlocking and resetting operating methods, then at the same time, with regard to the direct-pull present, considering make-ups in addressing its insufficiency in the unlock status and procedure control, by completing the module unlock and reset operation, so as to reduce the possibility of various misoperations to a minimum, as well as realizing a same easy and simple operation.

For the above purpose, the solution in this invention is as follows:.

An unlocking structure for unlocking pluggable modules locked by mounting cages with cages' engagement springs, comprising:.

Said unlocking structure, wherein the motion block piece includes a reset bulge, wherein the detention bulge moves in pace with the reset bulge once the reset bulge is under drive by a force.

Said unlocking structure, further comprising:.

Said unlocking structure, wherein the detention bulge and the reset bulge belong to different lateral heights of a same bulge, wherein the detention bulge becomes the detention section and the reset bulge becomes the reset section, the detention section being closer to the casing as compared to the reset section; and wherein a detention-yield recess is set in conjunction with the resetting edge on the push/pull handle, wherein the detention-yield recess corresponds to and cooperates with the detention section, and the resetting edge corresponds to and cooperates with the reset section.

Said unlocking structure, in which the motion block piece is a rotation block piece, wherein the rotation block piece is rotatably connected to the casing through a fix for rotation in such a way that the rotation block piece fluctuates up and down the casing surface when the rotation block piece rotates about the fix.

Said unlocking structure, in which the motion block piece is a rotation block piece, wherein the rotation block piece is rotatably connected to the casing through a fix for rotation in such a way that the rotation block piece fluctuates up and down the casing surface when the rotation block piece rotates about the fix, wherein the detention bulge and the reset bulge are separated along the rotation's axial direction.

Said unlocking structure, wherein the unlocking plate includes a semi-closed rotation yield hole and the push/pull handle includes a limiting rod, wherein the limiting rod can slide within the semi-closed rotation yield hole and when the limiting rod is at the innermost position of the semi-closed rotation yield hole, the push/pull handle is at the longitudinal horizontal status.

Said unlocking structure, wherein a first limiting bump is set at the joint position where the border of the semi-closed rotation yield hole meets the profile edge of the unlocking plate such that when the push/pull handle rotates and the limiting rod passes over the first limiting bump, the limiting rod can be limited by the first limiting bump so that the push/pull handle can be kept at this position.

Said unlocking structure, wherein a second limiting bump is set on the casing such that the second limiting bump can adjoin the limiting rod when the limiting rod is positioned at the innermost of the semi-closed rotation yield hole, where the second limiting bump can limit an unintentional jumping or jittering of the limiting rod.

Said unlocking structure, in which the unlocking plate includes a reset-pass opening, wherein when the unlocking plate slides to the designated position and completes module unlocking, the reset bulge can pass through the reset-pass opening of the unlocking plate.

Said unlocking structure, wherein the longitudinal length of the reset-pass opening matches the longitudinal sliding distance of the unlocking plate such that the reset bulge can always pass through the reset-pass opening during the unlocking plate's sliding along the casing's longitudinal direction to the designated position.

Said unlocking structure, wherein the unlocking plate includes an auxiliary control opening in parallel with the reset-pass opening and the motion block piece includes an auxiliary control bulge, wherein only when the unlocking plate slides, along the casing's longitudinal direction, to the designated position and completes module unlocking, can the auxiliary control bulge pass through the auxiliary control opening of the unlocking plate.

Said unlocking structure, further comprising:
a motion block spring that is normally under compressed status is set between the motion block piece and the casing.

Said unlocking structure, wherein the first combined recess includes a vertical mounting groove for a passing of the bent structure of the unlocking plate, wherein one end of the vertical mounting groove is open, the other connects to the horizontal longitudinal accommodation recess; and wherein the unlocking plate includes a return spring mounting opening by a side of the bent structure along the longitudinal direction, wherein the return spring mounting opening corresponds to the position of the horizontal longitudinal accommodation recess in order to mount the return spring.

Said unlocking structure, wherein a locking step surface is set at the rear end of the first combined recess, wherein the locking step surface is to work with the cage engagement spring and is the designated position; and wherein the unlocking plate includes an unlocking arm in the longitudinal direction, wherein the unlocking arm can slide backward along the longitudinal direction in the first combined recess, wherein the unlocking arm includes an unlocking edge at the rear end of the unlocking arm so that the unlocking edge is to get contact with the locking step surface thus to carry out module unlocking.

Said unlocking structure, wherein an upper step surface and a lower step surface with coplanarity are set in the first combined recess along the upper and lower edge regions of the unlocking arm in the longitudinal length direction; and wherein a slope surface is set close to the locking step surface in the first combined recess.

A method of unlocking pluggable modules locked by mounting cages, comprising:.

Said method of unlocking pluggable modules, further comprising:.

Said method of unlocking pluggable modules, further comprising:
setting a return spring between the unlocking plate and the casing along the casing's longitudinal orientation such that when the detention bulge is separated away from the detention edge of the unlocking plate the return spring drives the unlocking plate back forward and resets the module.

Advantages of the invention: The pluggable modules' unlocking structure and operating method of this invention provide a kind of complete operation mechanism for the module unlock and reset, where not only is the handling with cable attached obtained, but also it's convenient to realize in-situ resetting, with maximum avoidance of misoperations and accidents, while being with easy and simple operations. Meanwhile, for pluggable modules of the unlocking structure of this invention, the assembling process is simple and fast, the assembled is firm and stable, with no hidden issue, and no special or particular tools are in need, whereas the parts repair and change are easy as well, which gives good operability in implementations.

With reference to the drawings, some specific embodiments of the invention are described below in details, the disclosure of which is for the purpose of illustration and not of the nature of limitation. The same reference signs in the drawings refer to the same or alike elements or parts. These drawings are to be interpreted as illustrative and thus may not be drawn in scale.

One embodiment of the invention is shown in <FIG> and <FIG>. <FIG> is an illustration of an example pluggable module 1XA of the invention in its decomposed assembly structure, which comprises: a push/pull handle 11A, an unlocking plate <NUM>, a base casing <NUM>, a cover casing <NUM>, a pair of rotation block piece 15X, a pair of rotation pin <NUM>, a pair of rotation block spring <NUM>, a pair of return spring <NUM>, a module PCB <NUM>, and fixing screws <NUM>. Except these, those elements that are installed inside the module casing are omitted in this illustration. <FIG> illustrates the integrate appearance of the example pluggable module 1XA of the invention at its primary status after assembling all the elements of <FIG> together. Note that, in this description, for those identical or mirrored elements or structure parts that are in symmetry in the embodiments, only one unit is given a reference sign in each drawing, and the citation of this reference sign, unless otherwise indicated, does not make a particular distinction between these identical or mirrored elements or parts to which the reference sign is referring.

<FIG> gives the detailed structure of the push/pull handle 11A of the example pluggable module 1XA of the invention. It contains a rotation rod <NUM> set at each inner face of the connecting end of the body, a resetting square hole <NUM> set on each side of the connecting end of the body, and a limiting rod <NUM> set at each inner face of the connecting end of the body. The limiting rod <NUM> is a cylinder piece. In addition, the special <NUM>-degree bent part at the rear end of the body is the hand-touch end <NUM>, where the special bent design makes the hand-touch end <NUM> applicable in both pushing and pulling of the handle 11A. The circular depressed area <NUM> shown on the body here is used for color labeling of the optoelectronic type of modules indicating their working wavelengths, where the colors thereof are defined in relevant standards.

<FIG> gives the detailed structure of the unlocking plate <NUM> of the example pluggable module 1XA of the invention. Being an H-shaped profile, it contains an unlocking arm <NUM> in a longitudinal strip form at each side of the module casing, and a lateral connection part <NUM> holding the two unlocking arms <NUM> into an entirety. The entire unlocking plate is of a sheet structure and is mounted closely covering the casing of the module 1XA, and can slide back and forth in the longitudinal horizontal direction in relation to the casing. The part of the unlocking arm <NUM> facing toward the rear of the module 1XA, as the rear end of the unlocking arm <NUM>, is the unlocking end, which contains an unlocking edge <NUM>, the unlocking edge <NUM> here being a normal flat plate edge; the part of the unlocking arm <NUM> facing toward the front of the module 1XA, as the front end of the unlocking arm <NUM>, is the connecting and control end, which contains a rotation rod connection hole <NUM>, a reset-pass square hole <NUM>, a detention square hole <NUM>, a semi-closed rotation yield hole <NUM>, and a first limiting bump <NUM> which is positioned at the joint where the upper border of the semi-closed rotation yield hole <NUM> meets the front edge of the unlocking arm <NUM>. In addition, a bent structure <NUM> and a return spring mounting hole <NUM> are set between the front and rear ends of the unlocking arm <NUM>, being in the intermediate part of the unlocking arm <NUM>, and are arranged in tandem along the longitudinal horizontal direction, where the bent structure <NUM> is nearer the front side of the unlocking arm <NUM> with regard to the return spring mounting hole <NUM>. <FIG> gives a close-up view of the semi-closed rotation yield hole <NUM> with the first limiting bump <NUM> at its joint edge as indicated above along its upper border.

Among these structures, the rotation rod connection hole <NUM> of the unlocking plate <NUM> is used to connect with the aforesaid rotation rod <NUM> of the push/pull handle 11A. After connection, the push/pull handle 11A can rotate with regard to the unlocking plate <NUM>, and can push and pull the unlocking plate into a horizontal displacement as well. The semi-closed rotation yield hole <NUM> of the unlocking plate <NUM> corresponds to the aforesaid limiting rod <NUM> of the push/pull handle 11A. When the push/pull handle 11A and the unlocking plate <NUM> are connected through the rotation rod <NUM> of the push/pull handle 11A and the rotation rod connection hole <NUM> of the unlocking plate <NUM>, this limiting rod <NUM> of the push/pull handle 11A will fall into the semi-closed rotation yield hole <NUM> of the unlocking plate <NUM>. The design of the semi-closed rotation yield hole <NUM> is such that it will allow the push/pull handle 11A, under the confinement to its limiting rod <NUM> within the yield hole, to rotate upward from its horizontal flat position with regard to the unlocking plate <NUM>, but can not go downward, using the working orientation of the module 1XA in <FIG> as a reference. Meanwhile, the first limiting bump <NUM> at the said joint edge of the upper border of the semi-closed rotation yield hole <NUM>, will permit the push/pull handle 11A to stay at the angle where its limiting rod <NUM> just passes the bump, without otherwise falling back to its initial horizontal position on itself after it is rotated as driven by external force upward and the limiting rod <NUM> so overcomes and passes the first limiting bump <NUM>, the status of which can facilitate the operations such as plugging and unplugging of the cables to the module.

The base casing <NUM> and the cover casing <NUM> of the module constitute the main frame to install every internal units of the module including its PCB <NUM>, and to bear each mechanical working structures and other composing parts. For a convenient indication, <FIG> gives out the integrate outer casing of the module 1XA formed by fixing the base casing <NUM> and the cover casing <NUM> of the example pluggable module 1XA of the invention together through fixing screws <NUM>. The part of the casing, on each of its lateral sides, has a first combined recess <NUM> adapted to the unlocking end and the central region of the unlocking arm <NUM>, and a second combined recess <NUM> adapted to the control end of the unlocking arm <NUM>.

The first combined recess <NUM> confines the unlocking arm <NUM> with regard to its upper and lower edges along its strip-like structure so that the unlocking arm <NUM> can only move back and forth along the horizontal direction (i.e., the longitudinal horizontal direction). In particular, in this first combined recess <NUM> on each side of the casing of the example pluggable module 1XA of the invention, an upper step surface <NUM> and a lower step surface <NUM> with coplanarity are formed, in the base casing <NUM> and in the cover casing <NUM> respectively, corresponding to the upper and lower edges of the unlocking arm <NUM> along its longitudinal length of its strip structure. The section of the unlocking arm <NUM> that falls within the first combined recess <NUM>, only gets in touch with this upper step surface <NUM> and the lower step surface <NUM>, so as to reduce the friction resistance between the unlocking arm <NUM> and the casing surface of the module 1XA during the module unlocking and resetting operations of the invention. There is another slight slope set within the rear of the upper step surface <NUM> and the lower step surface <NUM> extended toward the rear of the module, and within a limited rearmost area of this slop, the two steps are merged into a common slop surface. At the same time, the recess border edge at the end of the slight slop of the upper step surface <NUM> and the lower step surface <NUM> forms the locking step surface <NUM> of the module 1XA set in this first combined recess <NUM> that is to engage with the cage leaf spring <NUM>. The locking step surface <NUM> is also formed by the base casing <NUM> and the cover casing <NUM> together, and about the center region of this locking step surface <NUM> a dedicated recess room <NUM> is formed toward the rear end of the module. Different from the prior arts where the recess room of here is to accommodate the unlocking bulge <NUM>' (refer to <FIG>), the recess room <NUM> set in this invention is to reduce the effective contact length between the cage leaf spring <NUM> and the locking step surface <NUM>, in order to ease the lifting of the cage leaf spring <NUM> by the unlocking edge <NUM> of the unlocking arm <NUM>, as compared to an entire contact width of the cage leaf spring <NUM>, for the purpose of module unlocking operation.

The reason for that the sides of the upper step surface <NUM> and the lower step surface <NUM> to the rear end of the module casing are made into a slight slope region goes to the restriction of the overall width of the casing that is regulated in the related protocols and standards regarding the module 1XA. Under this restriction, the outer surface of the unlocking arm <NUM> can not go beyond the casing surface of the module 1XA as formed by the base casing <NUM> and the cover casing <NUM> (i.e., the outer surface of the unlocking arm <NUM> can not protrude outside the casing surface of the module 1XA), except that at the position of the locking step surface <NUM> of the casing where the engagement with the cage leaf spring <NUM> takes place, it is allowed to extend beyond within a certain limit. For this, and for the guarantee of a sufficient unlock implementation by the unlocking edge <NUM>, that is, to guarantee a thorough separation from the locking step surface <NUM> while the cage leaf spring <NUM> is being raised by the unlocking edge <NUM>, a certain defined slight slope can thus be incorporated at a rear limited region adapted in the first combined recess <NUM> where the unlocking edge <NUM> of the unlocking arm <NUM> is to reach through during its unlocking operation, with the effect that when the unlocking edge <NUM> arrives at the position of the locking step surface <NUM>, the unlocking edge <NUM> is thereby lifted by the slight slope so that its edge top can be higher than the upper edge surface of the locking step surface <NUM> (i.e., the casing surface), which as a result assures that the cage leaf spring <NUM> is totally removed out of the locking step surface <NUM>, safeguarding the separation between and the effect of unlocking.

Besides, a vertical mounting groove <NUM>, in order to allow the pass of the bent structure <NUM> of the unlocking arm <NUM>, and a horizontal longitudinal accommodation recess <NUM>, in order to accommodate both the bent structure <NUM> and the return spring <NUM>, are configured in the first combined recess <NUM>. In this embodiment, the vertical mounting groove <NUM> and the horizontal longitudinal accommodation recess <NUM> both reside in the part of the base casing <NUM>, in which, one end of the vertical mounting groove <NUM> opens to the base ground of the base casing <NUM>, the other connects to the horizontal longitudinal accommodation recess <NUM>, and in which, the internal end face of the horizontal longitudinal accommodation recess <NUM> that is closer to the module front is the defined stop limit <NUM>, wherein this stop limit <NUM> decides the ultimate location that the unlocking plate <NUM> can reach when it moves on the casing of the module 1XA in the direction toward the front end, by engagement with the bent structure <NUM> of the unlocking arm <NUM>.

The second combined recess <NUM> in this disclosure mainly contains two configuration sections. One is the rotation block recess <NUM>, to provide motion space for the rotation block piece 15X, the other the handle restriction recess <NUM>, to confine the motion of the push/pull handle 11A through restrictions to the limiting rod <NUM> there within. In this embodiment, the second combined recess <NUM> is only formed with the base casing <NUM>. A vertical rotation pin hole <NUM> is provided within the rotation block recess <NUM>, used to mount the rotation pin <NUM><NUM>. The rotation pin hole <NUM> is of a non-through nature with a closed bottom, while the rotation pin <NUM> is a relatively short cylinder, with a tight fit to the rotation pin hole <NUM>, so that the rotation pin <NUM> won't fall out in its use when the rotation pin <NUM> is mounted into this rotation pin hole <NUM>. Another horizontal lateral accommodation hole <NUM> is set in the rotation block recess <NUM>, used to accommodate the rotation block spring <NUM>. With regard to the handle restriction recess <NUM>, its configuration is to be specified later where the motion and operating of the push/pull handle 11A are involved. In particular, among all, at a certain position along the upper border of the handle restriction recess <NUM>, a second limiting bump <NUM> is set, which corresponds to the location of the handle limiting rod <NUM> when the push/pull handle 11A is at its primary, horizontal status (refer to <FIG>). A close-up view of this part of area is given in <FIG>. This second limiting bump <NUM> set within the handle restriction recess <NUM>, will permit a stability of the push/pull handle 11A of the invention when it is at its primary position, such as when the module is at its regular locked working status being installed in the equipment mounting cage, where the handle won't jump or jitter under outside vibrations or other environmental factors which otherwise leads to noises.

The rotation block piece 15X of the disclosure is the key element that determines the working mechanism of this invention as well as related quantitative designs. A representative structure <NUM>' of a basic configuration in example, of this rotation block piece, is illustrated in <FIG>, which can be described as a "coaxial parallel (CP)" conjoined rotation structure. As an illustration, this representative CP conjoined rotation structure <NUM>' contains an engagement part <NUM>', and a disengagement part <NUM>', where the engagement part <NUM>' and the disengagement part <NUM>' rotate around a same axis <NUM>' in a conjoined integrity with mutual impacts between, and at any time, if one part rotates by or to a certain angle, the other will rotate by or to the same angle along with the former; meanwhile, the engagement part <NUM>' and the disengagement part <NUM>' are separated in space along the axial direction of the rotation axis <NUM>' by a certain distance y, where the value of y that is to be appointed, according to the application, should promise no structural interference or conflict between respective third party objects that are in interaction with the engagement part <NUM>' and the disengagement part <NUM>' respectively. That is, the engagement part <NUM>' and the disengagement part <NUM>' rotate about a same axis <NUM>' in an "axial-separated" manner while together form a conjoined entirety with mutual impacts and each is to establish structural relationship with its own interactive object. Using x<NUM> and x<NUM> to represent, respectively, the radial distance from each working point of the engagement part <NUM>' and the disengagement part <NUM>' to the center of the rotation axis <NUM>', one can get that the ratio between the rotational displacement of each working point of the engagement part <NUM>' and the disengagement part <NUM>' rotating about the rotation axis <NUM>', equals to the ratio between their respective radial distance to the center of the rotation axis <NUM>', i.e., x<NUM>/x<NUM>. In general, the engagement part <NUM>' and the disengagement part <NUM>' can locate by the same side of the rotation axis <NUM>', or else can locate by the opposite side to each other. A characteristic of this CP conjoined rotation structure <NUM>' in this disclosure is: this ratio x<NUM>/x<NUM> (with signs) can take up a value of +<NUM>, where the effective displacements and the directions are totally the same, and else can take any value needed apart from +<NUM>. In addition, in a general principle, this CP conjoined rotation structure can include multiple engagement parts and/or disengagement parts at the same time, and the above relations apply between any engagement part and its corresponding disengagement part.

An applied example structure of the CP conjoined rotation structure <NUM>' in this embodiment is the rotation block piece 15X as shown in <FIG>. The rotation block piece 15X contains a detention bulge <NUM> and a reset bulge <NUM>, which correspond respectively to the engagement part <NUM>' and the disengagement part <NUM>' of the CP conjoined rotation structure <NUM>', located by the same side of the rotation axis; the rotation block piece 15X is to rotate about the vertical rotation pin <NUM> fixed in the second combined recess <NUM> of the pluggable module 1XA, where a rotation hole 153X is set in the rotation block piece 15X for connection with the rotation pin <NUM>. Besides, the backside of the rotation block piece 15X is the working face against the rotation block spring, which can be a plain flat face. <FIG> demonstrates the installation of the rotation block piece 15X into the rotation block recess <NUM> of the module casing by connection with the rotation pin <NUM>. In a better case, a rotation pin hole <NUM> of a through-hole nature can be used in the rotation block recess <NUM> (refer to <FIG>), together with a relatively long rotation pin <NUM>, which is still with a tight fit to the rotation pin hole <NUM>. <FIG> shows the installation under this case of the rotation block piece 15X into the rotation block recess <NUM> of the module casing, from which one can know that the bottom of the rotation pin <NUM> can be abutted by the internal wall of the rotation block recess <NUM> after mounting of the rotation pin <NUM> into the rotation pin hole <NUM>, thus the rotation pin <NUM> won't fall out in its use, either. An advantage of the through-hole <NUM> and long rotation pin <NUM> structure in <FIG>, compared to the non-though-hole <NUM> and short rotation pin <NUM> structure in <FIG>, is that, once the rotation pin gets broken inside the rotation pin hole, the case of <FIG> will help removing the debris out of the rotation pin hole, better for repair management.

For the structure of the rotation block piece 15X as shown in <FIG>, the detention bulge <NUM> is to work with the detention square hole <NUM> of the unlocking plate <NUM> at the control end (refer to <FIG>), and the reset bulge <NUM> is to work with the resetting square hole <NUM> of the push/pull handle 11A (refer to <FIG>). Among them, the actual feature of the detention square hole <NUM> that works with the detention bulge <NUM> is the pertinent hole edge supplied by the detention square hole <NUM>, called the detention edge; the actual feature of the resetting square hole <NUM> that works with the reset bulge <NUM> is the pertinent hole edge supplied by the resetting square hole <NUM>, called the resetting edge. In this embodiment, a reset-pass square hole <NUM> is set at the control end of the unlocking plate <NUM> (refer to <FIG>), which corresponds to the location of the resetting square hole <NUM> of the handle 11A when the handle under connection is at its horizontal status, where the reset-pass square hole <NUM> allows the reset bulge <NUM> of the rotation block piece 15X to pass through and thus work with the resetting edge of the resetting square hole <NUM> of the push/pull handle 11A. The specific way of working is as follows:.

<FIG> illustrates the relative positions among this rotation block piece 15X, the push/pull handle 11A, and the unlocking plate <NUM>, after their assembly in the pluggable module 1XA and put at the module unlocking position. A rotation block spring <NUM> is set at the back of the rotation block piece 15X, right beneath the reset bulge <NUM>, and is accommodated in the horizontal lateral accommodation hole <NUM> in the rotation block recess <NUM> (refer to <FIG>). The push/pull handle 11A, by its rotation rod <NUM>, is connected to the unlocking plate <NUM> with the plate's rotation rod connection hole <NUM>. When the push/pull handle 11A horizontally pushes the unlocking plate <NUM> to the module unlocking position, i.e., the unlocking edge <NUM> of the unlocking arm <NUM> reaches the locking step surface <NUM> at both sides of the module casing (refer to <FIG>), the detention square hole <NUM> at the control end of the unlocking arm <NUM>, and the reset-pass square hole <NUM> at the control end of the unlocking arm <NUM> along with the resetting square hole <NUM> of the push/pull handle 11A, will arrive, simultaneously, right above the detention bulge <NUM> and the reset bulge <NUM> of the rotation block piece 15X, respectively. At this moment, under the drive of the rotation block spring <NUM>, the detention bulge <NUM> and the reset bulge <NUM> of the rotation block piece 15X will pop up and enter at the same time into the corresponding holes as indicated above, by which, the detention bulge <NUM> is to work with the detention square hole <NUM> (its detention edge) of the unlocking arm <NUM> to lock the unlocking plate <NUM>, so that the unlocking plate <NUM> can not get back under the drive of its return spring <NUM>, thus the example pluggable module 1XA of this invention is maintained at the unlocked status. The effective work surface of the detention bulge <NUM> that is to engage with the detention edge of the detention square hole <NUM> is a vertical face, so as to apply an effective locking to the unlocking plate <NUM>. At this stage, if the pluggable module 1XA is being installed in the equipment mounting cage <NUM>, in this unlocked status where the cage leaf spring <NUM> is already raised up by the unlocking edge <NUM>, pulling the push/pull handle 11A in the reverse horizontal direction will remove the module 1XA out of the mounting cage <NUM>. It thus can be known that, during the module unlock and removal operations, the cables connected to the pluggable module 1XA needn't be detached.

After the pluggable module 1XA is removed from the mounting cage <NUM>, the module needs to perform a reset, that is, to return the unlocking plate <NUM>, with the unlocking edge <NUM> moving away from the locking step surface <NUM> of the module casing and back to the initial primary position, in order for a next locking upon insertion into the equipment again. At this stage, the push/pull handle 11A can be lifted up by rotating it upward, with which, the resetting square hole <NUM> (its resetting edge) of the push/pull handle 11A will go interaction with the reset bulge <NUM> of the rotation block piece 15X, where with the proceeding of the handle rotation, the resetting edge of the resetting square hole <NUM> successively depresses the reset bulge <NUM>, wherein the surface of the reset bulge <NUM> that is to work with the resetting edge of the handle's resetting square hole <NUM> is a defined slope face (refer to <FIG>). At the same moment, the detention bulge <NUM> that rotates conjointly in parallel with the reset bulge <NUM> is to retreat along with it, till freed from the engagement of the detention square hole <NUM> of the unlocking plate. Up to this, the locking to the unlocking plate <NUM> from the rotation block piece 15X is removed and the unlocking plate <NUM> will turn back to the initial primary position by itself under the drive of its return spring <NUM>, by which moment the reset operation to the module is completed. It can be known that, during this module reset operation as disclosed, the cables connected to the pluggable module 1XA needn't be detached, either.

Further, it can be known that the above reset operation can be applied while the pluggable module 1XA is not removed from the mounting cage <NUM>, where the operation is exactly the same, except that when there is a close neighboring port on the equipment panel in the vertical direction, as indicated in <FIG>, it should be made sure that the rotating reset operation of the push/pull handle 11A will not make the handle get in touch with the above neighboring module or its attached cable <NUM>, or, the resetting operation should not be made infeasible due to these factors. For this consideration, the structure parameters, especially the distance from the working face of the detention bulge <NUM> of the rotation block piece 15X to the axis of the rotation pin <NUM>, x<NUM>, plus the distance from the working face of the reset bulge <NUM> of the rotation block piece 15X to the axis of the rotation pin <NUM>, x<NUM> included, can be configured in such an effect that the resetting operation of the push/pull handle 11A to the module can be confined within a designated rotation angle limit needed in order to accomplish the module reset. For example, for a certain standard stack cage in the industry shown in <FIG>, with regard to a designed body length of <NUM> of the push/pull handle 11A, the above requirements can be met when the in-situ reset rotation angle is configured to <NUM> degrees, where the maximum rotation angle that can be applied is confined at <NUM> degrees, above which the rotation movement can not be performed (refer to <FIG>). These angle values for the above reset operation can be increased accordingly when the length of the handle 11A is shortened.

It can be known from the above unlock and reset operations with the push/pull handle 11A, as compared to the prior art operation of the direct-pull, since the handle movement direction of the module unlocking operation of the invention is pushing inward, opposite to the handle movement direction of outward pulling the module where it is the same operation of unlocking for the direct-pull, there won't be accidental line failure due to an unintentional removal of the pluggable module 1XA of this invention in that the direct outward-pulling of the handle of the pluggable module 1XA of the invention won't unlock it and therefore can't render it removed. At the same time, an upward touching of the handle rendering it lifted with rotation won't unlock the module either. In addition, even an unintentional engagement takes place so as to push inward the handle so far till unlocked, or, a wrong unlocking of an in-situ running module of the invention, i.e., unlocking of a module of a wrong line, happens, as long as the conduction of pulling of the module is not taken, this error can be rectified successively by performing the in-situ reset to the module thus recovering the locked status, for which cases the lines are all kept uninfluenced. All these above are the advantages that the direct-pull, and the rotation bail types can not obtain, wherein for the rotation bail, since no matter whether it is an unlock or a reset, it all calls for prior removal of the cables, therefore no matter what its case is, either a regular unlock, or a misoperation, its line interruption is always unavoidable.

In summary of the above, the unlocking structure and the operating method of the invention for the pluggable modules, provide a kind of complete operation mechanism for the module unlock and reset, and can maximally prevent misoperations and accidents from happening, while the related operations are simple and easy.

Based on the foregoing unlock and reset operations of the push/pull handle 11A, a description with regard to the configuration of the handle restriction recess <NUM> of the example pluggable module 1XA of the invention can be specified herein. As disclosed in <FIG> and <FIG>, the handle restriction recess <NUM> consists of an upper and a lower limiting borders, by which it applies position limits to the limiting rod <NUM> of the push/pull handle 11A. Among them, the lower border of the handle restriction recess <NUM> is a horizontal flat border, which allows, in the way that the limiting rod <NUM> chooses to butt against it, together under confinement from partial of the upper border, the movement of the push/pull handle 11A to be controlled generally in a horizontal displacement till it reaches the unlock position, upon its pushing of the unlocking plate <NUM> toward the rear end of the module for an unlocking operation. <FIG> illustrates the position of the limiting rod <NUM> inside the handle restriction recess <NUM> when the push/pull handle 11A is at its initial horizontal status, wherein the limiting rod <NUM> is butting against the second limiting bump <NUM> aforementioned set in the upper border of the handle restriction recess <NUM>, with the effect that unless driven by a dedicated force there won't occur rotation or jumping of the handle 11A in the upward direction. The upper border of the handle restriction recess <NUM> is then a combination of curved and horizontal flat surfaces, where an inner part is bent upward and the outmost side, i.e., the side by the module front, is a circular arc for yield, whereas at the rest areas where rotation of the handle 11A is not required but kept in a horizontal status, the surface is kept flat. The circular yield arc by the outmost side of the upper border of the handle restriction recess <NUM>, will allow the upward rotation of the handle 11A from at its initial horizontal position through its limiting rod <NUM>, where the semi-closed rotation yield hole <NUM> at the control end of the unlocking plate <NUM> always permits this upward rotation of the push/pull handle 11A in relation to the unlocking plate <NUM> through its limiting rod <NUM>, wherein it's the same for all situations below regarding this basic yielding.

<FIG> illustrates the position of the limiting rod <NUM> inside the handle restriction recess <NUM> when the push/pull handle 11A is horizontally pushed inward, i.e., toward the module rear end, to the module unlocking position. At this position, the unlocking plate <NUM> is locked by the detention bulge <NUM> of the rotation block piece 15X through the detention square hole <NUM> of the unlocking arm <NUM>, keeping the module 1XA at this unlocked status, under which the upper border of the handle restriction recess <NUM> will allow the limiting rod <NUM> to rotate upward therefrom.

<FIG> illustrates the position of the limiting rod <NUM> inside the handle restriction recess <NUM> when the push/pull handle 11A is rotated from the unlocked position upward performing the module resetting operation till the plate detention square hole <NUM> is assured of release from the locking by the detention bulge <NUM> of the rotation block piece 15X. As disclosed in the figure, with regard to the defined maximum allowed resetting angle of the push/pull handle 11A, the upper border of the handle restriction recess <NUM> at this point is configured as such: when the limiting rod <NUM> rotates to this angle, the further rotation will be prohibited by this upper border, and the limiting rod <NUM> will be always kept below this maximum rotation angle during the retreat of the unlocking plate <NUM>.

At the maximum rotation angle of the resetting operation illustrated in <FIG>, the unlocking plate <NUM> is already released from the locking by the detention bulge <NUM> of the rotation block piece 15X, from which moment the unlocking plate <NUM> will begin to retreat automatically under the drive of the return spring <NUM>, and at the same time the handle 11A is to be driven back to its initial horizontal status as shown in <FIG> or <FIG>, under the restrictions to the handle limiting rod <NUM> by the upper border of the handle restriction recess <NUM>. Meanwhile, the bent structure <NUM> on the unlocking arm <NUM> is to arrive at the aforementioned stop limit <NUM> in the first combined recess <NUM> on both sides of the module casing, representing the finish of the plate retreat, at which moment the limiting rod <NUM> is back at the position of the second limiting bump <NUM> in the handle restriction recess <NUM>.

In addition, <FIG> illustrates a status in which the push/pull handle 11A is rotated from its initial flat position upward, wherein the handle limiting rod <NUM> successively overcomes and passes the second limiting bump <NUM> and the first limiting bump <NUM>, till the handle stays where the rod just passes the first limiting bump <NUM>. This status is configured as such: at the primary status of the example pluggable module 1XA of the invention, the handle 11A can be lifted up by rotation and rendered stationary on its own at the angle position just passing the first limiting bump <NUM>, which can facilitate, if needed, the operations such as plugging and unplugging of the cables to the module. To release this lifted, rotated status, and to put the handle 11A back to its flat, it only needs to press down the handle and make the limiting rod <NUM> go back overcoming the two limiting bumps in succession. What's more, according to this embodiment structure, it can be known that, after passing of the first limiting bump <NUM>, the push/pull handle 11A can proceed with this upward rotation as far as it is over flipped toward the module rear end, till the relevant part of the handle touches a corresponding part of the module casing. Although this over-flipped status is either not the purpose of the invention, nor is it the standard operation in the work and utilizations of the example pluggable module 1XA of the invention, the relevant adoptions of it may still provide a kind of operational convenience under some special occasions, such as, when performing a certain surface inspection of the ports of an optoelectronic module under a microscope, and, for a facilitation in the assembly process of the pluggable module 1XA, the latter of which to be addressed in the following content that explains the module assembly process. In the meantime, in order to prevent this unrestricted, especially for the cases of inadvertence to prevent this push/pull handle 11A, when it has passed the first limiting bump <NUM>, from an abrupt backward flipping due to module's posture reasons which can cause a possible damage to the relevant parts of the handle and module casing, a preventive surface rounding treatment can be taken to the handle part <NUM> of the push/pull handle 11A in the said embodiment, as shown in <FIG>, which is about to get in touch with the module casing when the handle is flipped.

It can be known from the foregoing embodiment that, during the reset process of the pluggable module 1XA there exists a successive pressing of the reset bulge <NUM> of the rotation block piece 15X by the own body of the unlocking plate <NUM> starting from one edge of its reset-pass square hole <NUM> when it gets released from the detention bulge <NUM> of the rotation block piece 15X and makes the automatic retreat under its return spring <NUM> (refer to <FIG> and <FIG>); meanwhile, this extra down-press to the rotation block piece 15X from the unlocking plate's own body is already contained when the push/pull handle 11A is pushed from its initial primary position to the module unlocked position (refer to <FIG>). This part of forced downward rotation of the rotation block piece 15X is not in useful connection with the module unlock and reset, and is not related to the rotating operation of the push/pull handle 11A either, but merely due to the contact with the reset bulge <NUM> by the body plate itself of the unlocking plate <NUM> during its shifting, which leads to extra down-press. This part of extra down-press rotation of the rotation block piece 15X is in essence a senseless spin for nothing. Although it does not affect the general principle of the module unlock and reset operation of the invention, it brings about issues for particular applications such that an actual applicable rotation block piece 15X can not be realized attributed to this extra down-press rotation, the motion of which necessitates extra and probably appreciable amount of allowed recess space in the lateral depth, to be supplied by the module casing, wherein for those types of modules which have quite limited rooms, it becomes an impeding issue in design.

With regard to the foregoing, another embodiment of the invention is an pluggable module 1XA+ with a modification to the affecting body of the unlocking plate as compared to the foregoing pluggable module 1XA, in that the foregoing reset-pass square hole <NUM> (refer to <FIG>) is stretched into a rectangle long hole <NUM>, as shown by the modified unlocking plate <NUM>+ shown in <FIG>. After this extension from the foregoing reset-pass square hole <NUM> to the particular long hole <NUM>, when operating the push/pull handle 11A for the module unlocking and resetting, this passing long hole <NUM> on the unlocking plate will make pass for the reset bulge <NUM> of the rotation block piece 15X in the entire back and forth journey of the unlocking plate, instead of merely at the unlocked and its associated reset-waiting position. That is, the particular full-pass long hole <NUM> design can totally eliminate the extra down-press effect to the rotation block piece 15X from the unlocking plate, thus sparing the space consumption of the module casing that otherwise is brought out by the former extra down-press rotations. <FIG> display independently the views when the modified unlocking plate <NUM>+ is mounted onto the module casing being at the initial primary position and the unlocked position, respectively, which can clearly reflect the passing of the rotation block piece 15X by the full-pass long hole <NUM> during the entire primary-to-unlocked and reset to primary process.

Further, a composite pass hole 1213P can be employed based on the above full-pass long hole <NUM>, as shown in <FIG>, in which a short hole area, being an auxiliary control hole, is added along and in parallel with the above full-pass long hole; at the same time, an auxiliary control bulge 152P is added alongside the foregoing reset bulge <NUM> of the rotation block piece 15X, as the rotation block piece 15Xp shown in <FIG>. Among these, the reset bulge <NUM> corresponds to the lower long hole area of the composite pass hole 1213P of the unlocking plate 12P as given in <FIG>, wherein the long hole area functions the same as the full-journey pass to the reset bulge <NUM> as by the full-pass long hole <NUM> of the former pluggable module 1XA+; the auxiliary control bulge 152P then corresponds to the upper short hole area of the composite pass hole 1213P of the unlocking plate 12P shown in <FIG>, wherein the short hole area functions the same as the limited pass to the reset bulge <NUM> of the foregoing rotation block piece 15X as by the reset-pass square hole <NUM> of the foregoing pluggable module 1XA. As the auxiliary control bulge 152P does not undertake the reset duty, but rather independent from the reset bulge <NUM>, thereby its height can be defined separately, with which a design can be obtained as such that within a certain scope any needed degree of the down pressing of the rotation block piece 15Xp can be achieved with the unlocking plate 12P. This arbitrarily configurable down-pressing feasible in a certain range can be useful or needed in some applications, such as to relieve the contact impact between the profile edge of a handle and the protruding reset bulge <NUM> of a rotation block piece under some designs, in respect of the motion process that the push/pull handle 11A moves from the initial primary place to the module unlocking place. <FIG> respectively illustrate the representative relations between the unlocking plate 12P and the rotation block piece 15Xp when the corresponding pluggable module 1XpA in this embodiment is at its primary, intermediate, and unlocked positions, which present the effect of this joint working of the unlocking plate's composite pass hole 1213P and the rotation block's composite structure that includes the reset bulge <NUM> and the auxiliary control bulge 152P.

Represented by the example pluggable module 1XA among the above embodiments, with references to the relevant foregoing drawings, the assembly process and the related parts assembling details of the above example pluggable modules of the invention are specified below:.

From within the assembly process and the contents above, it can be drawn that, with the above example pluggable modules of the invention, the assembly process is fast and simple, the assembled being firm and stable, with no hidden issue, and no special or particular tools are needed either, which provides good applicability in handling. Meanwhile, the parts unmounting and replacement are quite easy, such as the key element of the above embodiments, the rotation block piece 15X/Xp, of which the unmounting and replacement with regard to the rotation pin <NUM>/L is essentially a swift-style operation in which the conduction can be finished in no time, wherein the rotation pin <NUM>/L can be a permanent installed part and doesn't need unmounting unless broken.

Apart from the foregoing rotation block piece 15X in the above embodiments, the CP conjoined rotation structure <NUM>' in this disclosure can be applied in the rotation block structures as shown in <FIG>, where it includes a twin-linkage rotation block piece 15Y and another single-linkage rotation block piece 15Z. The rotation block piece 15X in the foregoing embodiments is of a kind of single-linkage. Under different module embodiment structures or needs, either the foregoing single-linkage rotation block piece 15X or the single-linkage rotation block piece 15Z of <FIG> can be put in consideration. The twin-linkage rotation block piece 15Y is to strengthen or improve certain properties of the rotation block piece such as operation precision, strength reliability, etc. The installation of this twin-linkage rotation block piece 15Y onto the casing of its corresponding example pluggable module 1Y of the invention is shown in <FIG> (the complete illustration of the module 1Y being omitted), wherein, in consideration of the adaptation to the concurrent linkages to the rotation pin <NUM>+ by the detention bulge <NUM> and the reset bulge <NUM> of the rotation block piece 15Y and the fabrication limits, a hole is to be formed from the side of the base casing <NUM> that connects to the cover casing <NUM>, in order to produce the up-and-down through rotation pin hole <NUM>+ as shown. When the cover casing <NUM> and the base casing <NUM> are assembled together, the cover casing <NUM> will block up the bottom opening of the rotation pin hole <NUM>+, the assembly between the rotation pin <NUM>+ and the rotation pin hole <NUM>+ still being a tight fit, the rotation pin <NUM>+ therefore won't fall out during its use under this structure as well. In addition, similar to the relevant foregoing embodiments, the twin-linkage rotation block piece 15Y and the single-linkage rotation block piece 15Z in <FIG> can incorporate the auxiliary control bulge 152P too, under dedicated applications.

In other embodiments of this invention, according to the applied port layout on the equipment panel, including its orientation, and taking into account the circumstance considerations and needs regarding the cable deployments, the basic body shape of the push/pull handle 11A can take that of the push/pull bail 11A+, 11B, 11C of the pluggable module 1A+, 1B, 1C as shown respectively in <FIG>, in which Module 1A+ is kept a long handle relatively, whereas Module 1B and Module 1C are short handle designs. In these embodiments, a modification is taken to the former specially <NUM>-degree bent hand-touch end <NUM> of the push/pull handle 11A in the foregoing embodiments, in which the size of the bent part is reduced such that it turns to a push/pull bail rear end <NUM> that focus mainly on the pushing, along with which a hollow, ring-shaped structure <NUM> at the rear part of the handle is added, or else a shortest handle design as in <FIG> is adopted utilizing directly the U-shaped hollow structure <NUM> at the connecting end of the handle where an unlocking plate is connected, both of which serve as the means for assistance in the pulling operation. Among them, with regard to the short-body designs as in <FIG>, the reset rotation angle can be and needs to be increased by a certain amount, compared to the foregoing long-handle situations. For this reason, modifications can be done such as decreasing the distance from the detention bulge <NUM> of the adapted rotation block piece 15X/Y/Z (not visible in the drawings associated) to the axis of the rotation pin, i.e., the aforementioned x<NUM> (refer to <FIG>), while at the same time adjusting accordingly the position of the detention square hole <NUM> on the unlocking plate <NUM>/B/C, the cases of which where such adjustments are performed to the detention square hole <NUM> can be as illustrated in <FIG>.

In terms of the push-pull style of the unlocking and other operations of the pluggable modules of this disclosure, the push/pull handle or bail of the pluggable modules of the disclosure is in its whole made of such as metals, for example, a light-weight aluminum alloy.

<FIG> gives another example basic configuration of the rotation block piece of the invention. It's a rotation block piece 15V where the detention bulge and the reset bulge are laid and superimposed in the vertical direction. This vertical-superimposed rotation block piece 15V combines the detention bulge and the reset bulge into a same bulge, along the vertical height of which the profile is divided into two working sections as an upper section and a lower section, the lower section being the detention section 151V, and the upper section being the reset section 152V, which, respectively, retain the working face properties of the detention bulge <NUM> and the reset bulge <NUM> of the rotation block pieces in the foregoing embodiments. As compared to the former "axial-separated" "coaxial parallel" conjoined rotation structure, this vertical-superimposed structure can be described as "vertical-separated" "coaxial superimposed" conjoined rotation structure.

Based on the vertical-superimposed rotation block piece 15V, <FIG> gives a decomposed illustration in relation to a corresponding pluggable module 1VA with regard to its push/pull handle 16A, unlocking plate 12V, and this rotation block piece 15V. <FIG> illustrates the relative positions among these three at the module unlocking position after their assembly in the module 1VA. For the push/pull handle 16A and unlocking plate 12V, most parts of the structures are the same as the foregoing embodiments, as in reference to <FIG> and <FIG>, whereas the differences lie as: the resetting square hole <NUM> of the foregoing push/pull handle 11A here turns to a composite structure, which includes a rectangular resetting hole <NUM>-it contains a resetting edge, and a detention-yield recess <NUM> which is formed on the inner side of the handle and in conjunction with the rectangular resetting hole <NUM> (and with its resetting edge), a close-up view of this difference area being given in <FIG>; the detention square hole <NUM> and the reset-pass square hole <NUM> of the foregoing unlocking plate <NUM> here merge into a same rectangular composite detention hole 1214V, wherein this composite detention hole 1214V provides both a detention edge that is to work with the detention section 151V of the rotation block piece 15V for the locking of the unlocking plate 12V, and reset passing to the reset section 152V of the rotation block piece 15V which is superimposed above the detention section 151V, at the same time.

<FIG> shows a demonstration of the installation of the rotation block piece 15V onto the module casing of the pluggable module 1VA. <FIG> illustrates the interactions among the above three parts when assembled onto the casing of the pluggable module 1VA and put at the module unlocking position, in a cross-sectional view, where it can be clearly seen that the function of the detention-yield recess <NUM> of the handle 16A that is in adaptive conjunction with the handle's rectangular resetting hole <NUM> is to allow an upper yielding room for the detention section 151V of the rotation block piece 15V so that the detention section 151V of the rotation block piece 15V can partially stick out of the composite detention hole 1214V of the unlocking plate 12V for an effective locking. <FIG> illustrates the interactions among these three assembled on the casing of the pluggable module 1VA when the push/pull handle 16A performs the resetting rotation under this module unlocked position and rotates to the maximum resetting angle allowed, in a cross-sectional view (note: for principle purpose only where an actual case being better than the illustrated), wherein the defined maximum resetting angle allowed adopts the same base in the foregoing embodiments as for the given standard stack cage in the industry (refer to <FIG>), i.e., <NUM> degrees. It can be clearly seen from <FIG> that when the handle 16V rotates to this angle, the unlocking plate 12V is already released from the locking by the detention section 151V of the rotation block piece 15V and is able to automatically retreat.

According to the above illustrated structures of this embodiment, it can be found that under the scheme of the vertical-superimposed rotation block piece 15V, since the reset bulge and the detention bulge are superimposed as one, the unlocking plate 12V under this embodiment, as a principle, can not provide a full-journey reset passing to the reset section 152V of the rotation block piece 15V during the module unlocking and resetting. Therefore, under this embodiment, there exists the extra down-press to the rotation block piece 15V from the unlocking plate's own body and thereby induces extra needs and consumptions with regard to the lateral accommodation rooms of the module casing, as shown in <FIG> on the cross-sectional illustration of this extra down-press to the rotation block piece 15V by the own body of the unlocking plate 12V during its retreat process. The advantage of this vertical-superimposed scheme is compactness, simple force structure on the rotation pin 101V, thus capable of fine stability and strength reliability.

Claim 1:
An unlocking structure for unlocking pluggable modules locked by mounting cages (<NUM>) with cages' engagement springs (<NUM>), comprising:
a casing (<NUM>, <NUM>);
an unlocking plate (<NUM>) set onto the casing (<NUM>, <NUM>) to slide along the casing (<NUM>, <NUM>) in the casing's longitudinal direction, wherein the unlocking plate (<NUM>) can complete module unlocking once the unlocking plate (<NUM>) slides to a designated position, the unlocking plate (<NUM>) including a detention edge; and
a motion block piece (15X) set between the unlocking plate (<NUM>) and the casing (<NUM>, <NUM>), wherein the motion block piece (15X) can move in a transverse direction in relation to the casing (<NUM>, <NUM>), or in a direction containing the transverse direction, the motion block piece (15X) including a detention bulge (<NUM>);
characterized in that when the unlocking plate (<NUM>) slides to the designated position and completes module unlocking, the detention edge of the unlocking plate (<NUM>) is locked by the detention bulge (<NUM>).