A handle type module plug-in and pull-out locking extractor and a module plug-in and pull-out locking method

Abstract

This application discloses a handle-type module insertion / removal locking puller and a module insertion / removal locking method. The puller includes a handle base, with a puller rod, a wedge-shaped top block, and a corner lock on both sides of the handle base. The outer end of the puller rod is a lever jaw, the middle part of the puller rod is hinged to the handle base, and the inner end of the puller rod is a lever latch. The corner lock is hinged to the handle base, and the lever latch on one side of the puller rod engages with the latch of the corner lock on the opposite side. The locking method includes a module and a frame, as well as the aforementioned insertion / removal locking puller, with the handle base mounted on the module. The advantages of this application are: the handle base provides a handgrip for the module body, facilitating module placement, removal, and transport, and avoiding direct contact with the module surface; the longer operating arm of the puller rod provides greater auxiliary force, overcoming the meshing force during insertion, making the entire operation easier and allowing for one-handed operation.

Description

Technical Field

[0001] This application relates to a tool-free quick-release locking and puller for electronic modules, specifically a handle-type module insertion and release locking and puller and a module insertion and release locking method, which has both assisted insertion and release and locking and stopping functions. Background Technology

[0002] With the development of integrated electronic systems, highly integrated field-replaceable electronic modules (LRMs) are increasingly used on various platforms, including land, sea, air, and space. To quickly respond to field maintenance needs, improve field replacement efficiency, and enable LRM modules to be quickly installed or removed from racks, devices with assisted insertion / removal and locking / stopping functions are required. Currently, most LRM modules still use separate insertion / removal and locking devices, which are independent and installed on the front panel and ribs on the left and right sides of the LRM module, respectively. This method of use is traditional, time-consuming, and the locking device requires specialized equipment to perform locking and unlocking operations.

[0003] Patent (CN110300505) proposes an airborne electronic module quick-plug locking puller, which solves the problem that existing electronic module pullers cannot simultaneously lock the module. However, it requires one puller to be installed on each of the left and right front panels of the LRM module. This puller is a single-hook puller and must be operated separately. When plugging or unplugging the LRM module, the LRM module body must be held by hand to pre-plug or unplug the module, and then the pullers on the left and right sides must be operated separately. This method of directly holding the LRM module by hand may scratch the smooth surface of the LRM module. In addition, when the engagement force between the LRM module connector plug and the rack connector socket is large or there is no operating space on both sides of the LRM module, the smooth surface of the LRM module cannot be held, and the puller rod of the single-hook puller is too short to provide sufficient leverage force, making it impossible to pull out the LRM module. Summary of the Invention

[0004] The purpose of this application is to provide a convenient, time-saving, and labor-saving handle-type module plug-in and locking puller and module plug-in and locking method that can assist in plugging and unplugging and complete locking and stopping without tools, thereby solving the operational problems existing in the current LRM module puller.

[0005] The objective of this application is achieved through the following technical solution:

[0006] A handle-type modular plug-in locking puller includes a handle base. Both sides of the handle base are provided with a pull rod, a wedge-shaped top block, and a corner lock. The outer end of the pull rod is a rod jaw, the middle part of the pull rod is hinged to the handle base, the inner end of the pull rod is a rod buckle, and the corner lock is hinged to the handle base. The rod buckle of one side of the pull rod engages with the locking buckle of the corner lock on the opposite side.

[0007] Furthermore, the handle base is provided with a first handle pin hole and a second handle pin hole, and the lifting rods on both sides are provided with rod pin holes with corresponding positions. The first handle pin hole and the rod pin hole are aligned. The corner locks on both sides are provided with lock pin holes, and the second handle pin hole and the lock pin hole are aligned.

[0008] Furthermore, the lifting rod and the wedge-shaped top block are hinged to the vertical waist-shaped hole of the handle base via the same pivot, and a compression spring is provided between the lower part of the wedge-shaped top block and the handle base.

[0009] Furthermore, the horn lock is hinged to the circular hole of the handle base via a pivot, and a torsion spring is provided between the horn lock and the handle base to provide elastic force from the open position to the locked position.

[0010] Furthermore, a spring plate is provided between the lower part of the lifting rod and the handle base, and the spring plate is fixed to the handle base by a screw assembly.

[0011] Furthermore, the lower part of the lever locking buckle of the pulling rod is provided with an outward-facing lever bevel, the upper part of the locking buckle of the horn lock is provided with an inward-facing locking bevel, and the upper part of the inner end of the pulling rod is provided with an obstruction protrusion.

[0012] Furthermore, the horn portion of the horn lock faces outward and upward, and the limiting boss of the horn lock makes limiting contact with the handle base.

[0013] A module insertion and locking method includes a module and a frame, and also includes the aforementioned handle-type module insertion and locking puller, with the handle base disposed on the module. When the module is inserted into the frame, the module ribs on the module are aligned and inserted between the frame mounting slot ribs on the frame. The lever jaws of the puller engage with the frame stop, and downward pressure is applied to the inner ends of both pullers until the lever latches engage with the locking latches of the corner lock. During this process, the puller presses down on the handle base, causing the module to enter the frame and the wedge-shaped top block to descend. Finally, the module is fully inserted into the frame, and the wedge-shaped top block is tightened between the module ribs and the frame mounting slot ribs. When the module is disengaged from the frame, the corner lock is pulled outward, causing the lever latches of the puller to disengage from the locking latches of the corner lock, and the handle base is pulled to disengage the module from the frame.

[0014] Furthermore, when the module is inserted into the frame, the same pivot axis through which the lifting rod and the wedge-shaped top block are hinged descends along the waist-shaped hole of the handle base, overcoming the elastic force of the compression spring between the lower part of the wedge-shaped top block and the handle base; when the module is disengaged from the frame, the elastic force of the compression spring causes the wedge-shaped top block to disengage from the module rib and the frame mounting slot rib, and at the same time causes the rod lock to disengage from the lock lock.

[0015] Furthermore, when the module is inserted into the frame, the lifting rod overcomes the elastic force of the spring plate between the lower part of the lifting rod and the handle base, and the corner lock overcomes the elastic force of the torsion spring between the corner lock and the handle base. After the rod lock and the lock lock are engaged, the elastic force of the torsion spring makes the engagement tight. When the module is disengaged from the frame, the elastic force of the spring plate causes the rod lock and the lock lock to disengage, and the elastic force of the torsion spring causes the corner lock to return to the locked position.

[0016] The beneficial effects of this application are:

[0017] (1) This application not only realizes the insertion / locking function of the LRM module, but also provides a handle base installed on the front face of the LRM module, which provides a hand grip for the LRM module body, making it convenient to pick up and put down the module and transport it, avoiding scratches and contamination caused by direct contact with the smooth surface of the module. At the same time, the handle base is provided with three pin holes, which can lock the forked extended lifting rod and the corner lock on both sides of the locking lifting device, further ensuring that the lifting rod will not disengage after the LRM module is inserted into the frame and locked, thus preventing the LRM module from loosening. It has the characteristics of compact structure, strong vibration resistance and high reliability.

[0018] (2) The fork-shaped extended pull rod used in this application rotates around the oval mounting hole of the handle base during the LRM module insertion and removal process. The longer operating lever arm can provide greater auxiliary force, which can effectively overcome the meshing force between the LRM module connector plug and the rack connector socket, making the whole operation process easier. It can be operated with one hand and has the advantages of being fast, convenient, time-saving and labor-saving.

[0019] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding the solution of this application, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected by this application, and will not be exhaustively listed here. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structural assembly of this application.

[0021] Figure 2 for Figure 1A structural decomposition diagram.

[0022] Figure 3 for Figure 1 A cross-sectional view of the open state.

[0023] Figure 4 for Figure 1 A cross-sectional view of its closed state.

[0024] Figure 5 This is a schematic diagram of the structure of the pull rod in this application.

[0025] Figure 6 This is a structural schematic diagram of the corner lock component of this application.

[0026] Figure 7 A front view of the module in the rack mounting slot of this application in the locked state.

[0027] Figure 8 for Figure 7 A magnified lateral section view.

[0028] In the diagram: 1-Handle base, 2-Lifting rod, 3-Wedge-shaped top block, 4-Angle lock, 5-Rotating shaft, 6-Clip ring, 7-Compression spring, 8-Torsion spring, 9-Spring plate, 10-Screw assembly, 11-Module rib, 12-Rack mounting slot rib, 13-Rack stop, 201-Rack pin hole, 202-Rack jaw, 203-Rack latch, 401-Lock pin hole, 402-Lock latch, 403-Limiting ridge, 404-Limiting boss. Detailed Implementation

[0029] The following non-limiting embodiments are used to illustrate this application.

[0030] Example 1

[0031] refer to Figures 1-6 As shown, a handle-type module plug-in locking puller includes a handle base 1, a puller rod 2, a wedge-shaped top block 3, a corner lock 4, a rotating shaft 5, a retaining ring 6, a compression spring 7, a torsion spring 8, a spring plate 9, and a screw assembly 10.

[0032] Both sides of the handle base 1 are equipped with a pulling rod 2, a wedge-shaped top block 3, and a corner lock 4. The outer end of the pulling rod 2 is a rod jaw 202, which is used to engage with the frame stop block 13 and serve as a pry point during insertion and removal. The inner end of the pulling rod 2 is a rod lock 203, which is used to lock and limit the position with the corner lock 4 in the locked state, ensuring the stability of the locked state.

[0033] The middle part of the lifting rod 2 is hinged to the handle base 1. The lifting rod 2 is fulcrum by using this hinge point. The outer end of the lifting rod 2 is a short arm and the inner end (operating end) is a long arm, thus forming a force-saving lever. When inserting or removing the module, the resistance between the module and the frame acts on the force-reducing end of the outer end, while the force applied manually acts on the force-saving end of the inner end. The specific insertion / removal / locking action is achieved by rotating the lifting rod 2 around the hinge point.

[0034] A wedge-shaped top block 3 is mounted on the handle base 1. The wedge-shaped top block 3 is used to tighten and lock the module between the module and the frame. During the insertion and removal process, when the pull rod 2 moves the handle base 1, the wedge-shaped top block 3 moves synchronously, and the wedge-shaped top block 3 enters / exits between the module and the frame to tighten / disengage.

[0035] The horn lock 4 is hinged to the handle base 1. The lever latch 203 on one side of the lifting rod 2 engages with the locking latch 402 of the horn lock 4 on the opposite side. When the module is fully inserted into the frame and the wedge-shaped top block 3 is fully tightened, the horn lock 4 and the lifting rod 2 are locked together to maintain the locked state. By rotating the horn lock 4, the engagement between the lever latch 203 and the locking latch 402 can be released. At this time, the lifting rod 2 is in a free-rotating state, and the module can be disengaged.

[0036] Example 2

[0037] refer to Figures 1 to 8 As shown, a module insertion and locking method includes a module and a frame, and also includes a handle-type module insertion and locking puller of embodiment 1, with the handle base 1 fixedly disposed on the module.

[0038] When the module is inserted into the frame, the module ribs 11 on the module are aligned and inserted between the frame mounting slot ribs 12 on the frame, completing the pre-installation of the module. Then, the lever jaws 202 of the lifting rod 2 engage with the frame stop block 13, applying downward pressure to the inner ends of both lifting rods 2. The lifting rod 2 rotates inward around the oval mounting hole of the handle base 1, forming a force-saving lever structure, until the lever latch 203 of the lifting rod 2 engages with the latch 402 of the corner lock 4. During this process, the lifting rod 2 presses down on the handle base 1, driving the module into the frame and the wedge-shaped top block 3 descends. Finally, the module is fully inserted into the frame and the wedge-shaped top block 3 is tightened between the module ribs 11 and the frame mounting slot ribs 12.

[0039] When the module is detached from the frame, the corner lock 4 is pulled outward, causing the lever lock 203 of the lifting rod 2 to disengage from the lock lock 402 of the corner lock 4. The handle base 1 is then pulled to detach the module from the frame, and the wedge-shaped top block 3 disengages from the module rib 11 and the frame mounting slot rib 12.

[0040] As can be seen, when using the handle-type module insertion and locking puller of Embodiment 1 to insert and lock the module, the handle base provides a hand grip for the body of the LRM module, which facilitates the module's placement and transportation, and avoids scratches and contamination caused by direct contact with the smooth surface of the module.

[0041] The pull levers feature symmetrically arranged fork-shaped extended levers on both sides. These levers have long lever arms on the handle base, providing greater auxiliary force to effectively overcome the meshing force between the LRM module connector plug and the rack connector socket, making the entire operation easier. Since both pull levers are located on the same handle base and overlap, insertion / locking operations can be performed with one hand, offering advantages of speed, convenience, and time and effort savings.

[0042] A new type of horn lock is used to lock the lifting rod, which optimizes the structural design of the handle base and the lifting rod. This avoids the design difficulties of miniaturization and internalization of each component caused by the spring telescopic lock. At the same time, the horn lock structure is externally placed, which makes it easy to operate and easy to observe the locking status, thus optimizing the operation.

[0043] Example 3

[0044] refer to Figures 1-6 As shown, a handle-type module plug-in locking puller is an optimized and improved version of the handle-type module plug-in locking puller of Embodiment 1.

[0045] The handle base 1 is provided with a centrally symmetrical mounting groove, so that the lifting rods 2, wedge-shaped top blocks 3 and horn locks 4 on both sides are also centrally symmetrically arranged on the handle base 1. The lifting rods 2 on both sides are overlapped and cross-arranged, which makes it convenient to operate the two rods with one hand. The wedge-shaped part of the wedge-shaped top block 3 is arranged with the wedge-shaped part facing downward.

[0046] The handle base 1 has a Z-shaped structure, including a middle horizontal section, side vertical sections and edge horizontal sections. The middle horizontal section of the handle base 1 is provided with a first handle pin hole and a second handle pin hole. The first handle pin hole is located in the middle and the second handle pin holes are located on both sides.

[0047] Both sides of the pull rod 2 are provided with rod pin holes 201, and the holes are aligned. The first pin hole of the handle is aligned with the rod pin hole 201. Both sides of the corner lock 4 are provided with lock pin holes 401, and the second pin hole of the handle is aligned with the lock pin hole 401. The pins are simultaneously inserted into the first pin hole of the handle and the rod pin hole 201, and simultaneously inserted into the second pin hole of the handle and the lock pin hole 401, so as to lock and fix the pull rod 2 and the corner lock 4, and prevent them from coming off when locked.

[0048] The lifting rod 2 and the wedge-shaped top block 3 are hinged to the vertical waist-shaped hole on the horizontal section of the handle base 1 through the same pivot 5 and retaining ring 6. The hinge point of the lifting rod 2 and the wedge-shaped top block 3 can move up and down synchronously relative to the handle base 1. A compression spring 7 is provided between the spring groove at the lower part of the wedge-shaped top block 3 and the spring groove of the handle base 1.

[0049] During engagement, the downward pressure of the pull rod 2 overcomes the elastic force of the compression spring 7, causing the wedge-shaped top block 3 to descend via the rotating shaft 5, thus locking the wedge-shaped top block 3 into place. Simultaneously, due to the buffering effect of the compression spring 7, the hinge point exerts a buffering force downwards on the handle base 1 and the module. During disengagement, the elastic force of the compression spring 7 causes the wedge-shaped top block 3 to disengage directly from the supported position, and also provides a certain force for the release of the lock on the pull rod 2.

[0050] The horn lock 4 is hinged to the circular hole on the vertical side of the handle base 1 via a pivot 5 and a retaining ring 6. A torsion spring 8 is provided between the horn lock 4 and the handle base 1, providing elastic force from the open position to the locked position, keeping the horn lock 4 in the locked position under normal circumstances, which is conducive to maintaining the locked state. The horn part of the horn lock 4 extends outward and upward, making it convenient for personnel to operate and observe the lock status. The limiting boss 404 of the horn lock 4 makes limiting contact with the handle base 1, keeping the horn lock 4 locked in the vertical position.

[0051] The torsion spring 8 is a fan-shaped torsion spring. The L-shaped open end and U-shaped end of the fan-shaped torsion spring are respectively attached to the limiting ridge 403 at the lower end of the mounting hole of the horn lock 4 and the inner wall of the mounting groove of the handle base 1. Under the tension of the fan-shaped torsion spring, the horn lock 4 rotates inward around the mounting hole. When the limiting boss 404 is fastened at the limiting opening of the handle base 1, the horn lock 4 remains in an upright closed state in the normal state. When the LRM module is inserted and locked, the conical locking latch 402 of the horn lock 4 is tightly engaged with the tongue-shaped latch 203 of the operating end of the pull rod 2, ensuring that the pull rod 2 does not pop out, thus locking the LRM module.

[0052] A spring plate 9 is provided between the lower part of the lifting rod 2 and the handle base 1. The spring plate 9 is fixed in the middle cavity of the handle base 1 by the screw assembly 10. The spring plate 9 adopts a disc-shaped spring plate with a central symmetrical structure. The spring plates on both sides are located below the inner end of the lifting rod 2, which can provide elastic support for the inner end of the lifting rod 2, making it easy for the lifting rod 2 to pop out from the locked position.

[0053] The lower part of the lever latch 203 of the pull lever 2 has an outward-facing bevel, and the upper part of the locking latch 402 of the horn lock 4 has an inward-facing bevel. When the pull lever 2 is pressed down, the two bevels engage, pushing the horn lock 4 to rotate outward and open, thus automatically locking the pull lever 2. An obstruction boss is provided at the upper inner end of the pull lever 2 to prevent the handle base 1 from sliding to the horn lock 4. When unlocking the horn lock 4, the obstruction boss can be pressed simultaneously with the palm of the hand to reduce contact between the two latches and facilitate opening.

[0054] Example 4

[0055] refer to Figures 1 to 8 As shown, a module insertion and locking method is an optimized and improved version of the handle-type module insertion and locking starter of Embodiment 3 and the insertion and locking method of Embodiment 2.

[0056] When the module is inserted into the frame, the same pivot 5 that hinges the lifting rod 2 and the wedge-shaped top block 3 descends along the oblong hole of the handle base 1, overcoming the elastic force of the compression spring 7 between the lower part of the wedge-shaped top block 3 and the handle base 1. During this process, the lifting rod 2 presses down on the handle base 1, driving the module into the frame and the wedge-shaped top block 3 descends. Finally, the module is fully inserted into the frame and the wedge-shaped top block 3 is braced between the module rib 11 and the frame mounting slot rib 12.

[0057] When the module enters the rack, the downward pressure of the handle base 1 and the reaction force of the inner side of the rack stop 13 together push the LRM module along the rack mounting slot rib 12, thereby locking the front and rear ends of the LRM module in the length direction. At the same time, the conical surface of the wedge-shaped top block 3 is in close contact with the inclined surface of the module rib 11 and the rack mounting slot rib 12, respectively, generating a component force along the inclined surface, thereby locking the left and right ends of the LRM module in the thickness direction.

[0058] When the module is detached from the frame, the elastic force of the compression spring 7 causes the wedge-shaped top block 3 to disengage from the module rib 11 and the frame mounting groove rib 12, and at the same time causes the rod lock 203 to disengage from the lock lock 402.

[0059] When the module is inserted into the frame, the lifting rod 2 overcomes the elastic force of the spring plate 9 between the lower part of the lifting rod 2 and the handle base 1, and the corner lock 4 overcomes the elastic force of the torsion spring 8 between the corner lock 4 and the handle base 1, so that the lifting rod 2 enters the locked position. After the rod lock 203 and the lock lock 402 are engaged, the elastic force of the torsion spring 8 makes the engagement tight and maintains the locked state.

[0060] When the module is detached from the frame, the elastic force of the spring plate 9 causes the lever latch 203 to disengage from the locking latch 402, and the elastic force of the torsion spring 8 causes the corner lock 4 to return to the locked position.

[0061] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0062] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A handle-type module plug-in locking puller, comprising a handle base (1), characterized in that: The handle base (1) is provided with a pull rod (2), a wedge-shaped top block (3) and a corner lock (4) on both sides. The outer end of the pull rod (2) is a rod jaw (202), the middle part of the pull rod (2) is hinged to the handle base (1), the inner end of the pull rod (2) is a rod buckle (203), and the corner lock (4) is hinged to the handle base (1). The rod buckle (203) of the pull rod (2) on one side is engaged with the locking buckle (402) of the corner lock (4) on the opposite side. The pull rods on both sides are arranged in an overlapping and cross pattern. The lifting rod (2) and the wedge-shaped top block (3) are hinged to the vertical waist-shaped hole of the handle base (1) through the same rotating shaft (5). A compression spring (7) is provided between the lower part of the wedge-shaped top block (3) and the handle base (1).

2. The handle-type module plug-in locking puller according to claim 1, characterized in that: The handle base (1) is provided with a first handle pin hole and a second handle pin hole. The lifting rods (2) on both sides are provided with rod pin holes (201) and the holes are aligned. The first handle pin hole is aligned with the rod pin hole (201). The corner locks (4) on both sides are provided with lock pin holes (401). The second handle pin hole is aligned with the lock pin hole (401).

3. The handle-type module plug-in locking puller according to claim 1, characterized in that: The horn lock (4) is hinged to the circular hole of the handle base (1) via a pivot (5), and a torsion spring (8) is provided between the horn lock (4) and the handle base (1) to provide elastic force from the open position to the locked position.

4. The handle-type module insertion / removal locking puller according to claim 1 or 3, characterized in that: A spring plate (9) is provided between the lower part of the lifting rod (2) and the handle base (1), and the spring plate (9) is fixed to the handle base (1) by a screw assembly (10).

5. The handle-type module plug-in locking puller according to claim 1, characterized in that: The lower part of the lever lock (203) of the lever (2) is provided with an outward-facing lever slope, the upper part of the locking lock (402) of the horn lock (4) is provided with an inward-facing locking slope, and the upper part of the inner end of the lever (2) is provided with an obstruction boss.

6. The handle-type module plug-in locking puller according to claim 1 or 5, characterized in that: The corner of the horn lock (4) faces outward and upward, and the limiting boss (404) of the horn lock (4) is in limiting contact with the handle base (1).

7. A module insertion and locking method, comprising a module and a frame, characterized in that: It also includes the handle-type module plug-in locking puller as described in any one of claims 1 to 6, wherein the handle base (1) is provided on the module; When the module is inserted into the frame, the module ribs (11) on the module are aligned and inserted between the frame mounting slot ribs (12) on the frame. The lever jaws (202) of the lifting rod (2) are engaged with the frame stop (13). The inner ends of the lifting rods (2) on both sides are subjected to downward pressure until the lever latch (203) of the lifting rod (2) is engaged with the latch (402) of the corner lock (4). During this process, the lifting rod (2) presses down the handle base (1), which drives the module into the frame and the wedge top block (3) descends. Finally, the module is fully inserted into the frame and the wedge top block (3) is braced between the module ribs (11) and the frame mounting slot ribs (12). When the module is detached from the frame, the corner lock (4) is pulled outward, so that the lever lock (203) of the lifting rod (2) is disengaged from the lock lock (402) of the corner lock (4), and the handle base (1) is pulled to detach the module from the frame.

8. The module insertion and locking method according to claim 7, characterized in that: When the module is inserted into the frame, the same pivot (5) that hinges the lifting rod (2) and the wedge-shaped top block (3) descends along the waist-shaped hole of the handle base (1) and overcomes the elastic force of the compression spring (7) between the lower part of the wedge-shaped top block (3) and the handle base (1); When the module is detached from the frame, the elastic force of the compression spring (7) causes the wedge-shaped top block (3) to disengage from the module rib (11) and the frame mounting slot rib (12), and at the same time causes the rod latch (203) to disengage from the lock latch (402).

9. The module insertion and locking method according to claim 7 or 8, characterized in that: When the module is inserted into the frame, the lifting rod (2) overcomes the elastic force of the spring plate (9) between the lower part of the lifting rod (2) and the handle base (1), the corner lock (4) overcomes the elastic force of the torsion spring (8) between the corner lock (4) and the handle base (1), and after the rod lock (203) and the lock lock (402) are engaged, the elastic force of the torsion spring (8) makes the engagement tight; When the module is detached from the frame, the elastic force of the spring plate (9) causes the rod latch (203) to disengage from the lock latch (402), and the elastic force of the torsion spring (8) causes the corner lock (4) to return to the locked position.

Images