Lock release device capable of being installed on the outer side of indoor door and capable of releasing accumulated elastic force under high temperature of fire

Abstract

The technical scheme of the lock opener capable of being installed on the outer side of indoor door and releasing the energy storage elastic force under high temperature in fire is characterized by comprising an outer cover shell, an inner cover plate, an energy storage spring, a bimetallic device, a locking buckle and a locking buckle driving device, the bimetallic device is arranged on one side of the outer cover shell and the inner cover plate, the energy storage spring is arranged on one side of the outer cover shell, the locking buckle capable of locking the energy storage spring is arranged in the outer cover shell, the locking buckle driving device capable of being matched with the locking buckle and being driven by the thermal deformation of the bimetallic device is arranged in the outer cover shell, and the reset spring capable of helping the locking buckle driving device reset is arranged in the outer cover shell, the locking buckle can be unlocked from the locking of the energy storage spring with the displacement of the locking buckle driving device to the unlocking direction, the elastic force released from one end of the energy storage spring can drive the unlocking pull rope connecting point arranged on one side of the outer cover shell and drive the unlocking pull rope to achieve the required unlocking. The present application has simple structure and is convenient to manufacture, and can be widely used in the field of mechanical door lock or electronic door lock.

Description

Technical Field

[0001] This invention relates to the field of doors and door locks, and is a lock pick that can be easily installed on the outside of an interior door and can automatically help the lock enter the unlocking state or perform the required unlocking when exposed to critical high temperatures in a fire. In other words, it is a lock pick that can be installed on the outside of an interior door and releases stored energy when exposed to high temperatures in a fire. Background Technology

[0002] In the door industry and related lock industry, the mechanical or electronic door locks currently installed on doors have some problems: In the event of a fire, if people outside want to unlock or open the door to rescue others, they need to spend some time finding the key or using force to unlock or open the door, which will inconvenience the rescue from the outside and delay the rescue time; if the lock is burned or malfunctions due to high temperature, it will also delay the people inside from opening the door to escape; all of these pose a serious threat to people's lives and property and cause adverse consequences. Even if a temperature-sensing unlocking system can be installed in an electronic door lock, because the system is located inside the lock or uses electronic components to detect and execute the unlocking, such a system is not only easily unlocked by thieves from the outside or by using heat sources through keyholes, door gaps, or windows, but it is also easily damaged by high temperatures, causing the electronic components to malfunction and become unopenable. Although some fire doors install infrared smoke detectors on the walls or ceilings of interior doors away from the door, this technology is easily detected by smoke or fire light from inside the house, leading to accidental opening of the door or lock. These defects also pose a serious threat to the life and property of users or cause adverse consequences.

[0003] Furthermore, in patent applications numbered 202010920338.4 and 202021947295.0, titled "A Temperature-Sensitive Unlocking Power Disc for Easy Installation on the Outside of Indoor Doors," while this application overcomes the aforementioned shortcomings and allows direct pulling of the unlocking component in the lock during high temperatures from a fire, transforming the security door lock into a passageway lock for easier access by firefighters, the following drawbacks exist. This is because the aforementioned application uses a bimetallic device to directly pull the unlocking component. While this is relatively easy to implement for unlocking components requiring minimal external force and travel, for those requiring greater force and travel, increasing the weight of the bimetallic device is necessary to achieve the desired unlocking, resulting in a product that is excessively large and costly.

[0004] This invention overcomes the aforementioned shortcomings and provides a lock pick that releases the stored spring force to pull the unlocking component of the lock when exposed to high temperatures during a fire, thus unlocking the door. This invention is a purely mechanical structure and can be easily installed and used on the outside of an indoor door. Since this invention uses the force of a stored spring to drive the unlocking, the spring force and stroke only need to be set according to the external force and working stroke required by the unlocking component during the unlocking process, without the need for additional bimetallic devices. This allows the invention to easily meet the needs of different unlocking components in locks. Because this invention can be installed on the outside of an indoor door, far from the lock or keyhole, it makes it difficult for thieves to illegally unlock the door from the outside using heat sources such as keyholes, door gaps, or the door itself. Furthermore, because this invention requires the sensing temperature to reach a critical level before unlocking, it effectively prevents the door from being accidentally opened by non-fire smoke or firelight. This invention has a simple structure, is easy to manufacture, has reliable performance, and is convenient to use. It can be widely used in mechanical or electronic door locks and the fire doors that need to be made, such as fireproof and burglarproof doors, fireproof room doors, fireproof doors for shopping malls and office buildings, or fireproof doors for cinemas or kindergartens, etc., and has a broad market prospect. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides a technical solution for a lock pick that can be installed on the outside of an interior door and releases stored energy upon exposure to high temperatures during a fire. The lock pick comprises: an outer cover, an inner cover, a stored energy spring, a bimetallic device, a locking buckle, and a locking buckle mechanism. The stored energy spring is located on one side of the outer cover, and the inner cover is correspondingly located on the same side of the outer cover where the locking buckle is located. The key feature is that a heat-shrinkable nickel-titanium alloy wire is provided near the outer side of the outer cover. One end of the heat-shrinkable wire is connected and fixed to the outer cover, and the other end is connected and fixed to the locking buckle mechanism. A lock pick mechanism is located on one side of the outer cover and the inner cover. The locking cord connection point enables the locking cord to unlock as required. The outer cover contains a locking buckle that stores the energy storage spring in a stored state. The outer cover also contains a locking mechanism that matches the locking buckle and is driven by the thermal deformation of the heat-shrinkable metal wire, and a reset spring that helps the locking mechanism reset. The locking buckle disengages from the energy storage spring as the locking mechanism is pulled in the unlocking direction by the heat-shrinkable metal wire, allowing the spring force released from one end of the energy storage spring to drive the locking cord connection point located on one side of the outer and inner cover plates, thus unlocking the lock as required.

[0006] A metallic wire tube is provided on the outside of the connection point of the unlocking pull rope. The metallic wire tube is a flexible hose or a rigid tube or grooved tube that cannot be bent. One end of the metallic wire tube can be connected and fixed to the outer cover or inner cover plate for support. The other end of the metallic wire tube can be used to connect and fix to the lock or door panel for support. The unlocking pull rope is directly or indirectly connected to the unlocking component or unlocking lever in the lock that can open the lock body by penetrating the metallic wire tube.

[0007] An isolation bracket is provided on one side of the outer cover or one side of the inner cover to keep the bimetallic device at a certain distance from the door or lock panel.

[0008] The outer cover has a mechanism groove that matches the locking mechanism. The mechanism groove contains a locking mechanism with a sloping concave step. On one side of the outer cover corresponding to the sloping concave step of the locking mechanism, there is a locking groove that matches the locking buckle. The locking buckle has a circular cross-section. The locking buckle can be completely positioned in the locking groove as the locking mechanism moves in the unlocking direction. A return spring is located in the mechanism groove corresponding to one end of the locking mechanism. An inner cover adjacent to the locking groove has a locking groove that engages with the outer side of the locking buckle for locking and helps to press the locking buckle into the locking groove when needed. The energy storage spring can be a torsion spring or a push-pull spring. One end of the energy storage spring is connected to the outer cover for support, and the other end is connected to the inner cover for support. The unlocking pull rope connection point can be located at one end of the energy storage spring that releases the elastic force or on the side of the outer cover or inner cover that the energy storage spring can drive.

[0009] The locking buckle and locking mechanism are integrated into a "Z" shape, or a straight or curved column. One end is the locking buckle, and the other end is the locking mechanism. A locking mechanism pivot is located between the two ends. The outer cover has a pivot groove for the locking buckle and locking mechanism, which can be used and installed with the pivot. The locking buckle can rotate and displace in the unlocking direction with the locking mechanism and can be completely placed in the pivot groove. The return spring can be a torsion spring and is located on the outside of the locking mechanism pivot. The energy storage spring can be a torsion spring with one end connected to the outer cover and the other end connected to the locking buckle, or a push-pull spring with one end connected to the outer cover and the other end connected to the inner cover. The unlocking pull rope connection point can be located on one end of the energy storage spring that can release the elastic force or on one side of the inner cover that the energy storage spring can drive.

[0010] A locking post is provided at one end of the energy storage spring, which can support it and be used for energy storage and locking. The locking post is cylindrical, and a manual energy storage button is provided on one side perpendicular to the axis of the cylinder, which can be manually pushed to deform and store energy in the energy storage spring. A locking post groove is provided in the outer cover shell, which can match the locking post. The locking buckle has a "V" shape on its inner side and can cooperate with the locking post groove to lock the spring force of the locking post and the energy storage spring. The locking buckle has a buckle shaft that can rotate it. The locking buckle is installed in the inner side of the outer cover shell through its buckle shaft. A buckle return spring is provided on the locking buckle to help it unlock and reset. The locking buckle mechanism also has a buckle mechanism shaft that can rotate it. The locking buckle mechanism is connected to the buckle mechanism through its buckle mechanism. The rotating shaft is installed inside the outer cover. A hook is provided at one end of the locking mechanism, capable of rotating around the rotating shaft and controlling the locking buckle to be in a locked or unlocked state. The end of the hook that engages with the locking buckle is hook-shaped. A return spring is also provided on the rotating shaft to help the hook and locking buckle engage and lock. The energy storage spring can be a push-pull spring or a torsion spring. The energy storage spring is located on one side of the outer cover and inner cover, with one end connected to the outer cover or the inner cover fixed to it for support, and the other end connected to a locking post that engages with the locking buckle for support. The unlocking pull rope connection point can be located on the side connected to the locking post to form a manual energy storage button, or on the end of the energy storage spring that releases the stored energy, or on the locking post. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the principle structure of an embodiment of the present invention in the energy storage and locking state.

[0013] Figure 2 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0014] Figure 3 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0015] Figure 4 yes Figure 1 or Figure 2 or Figure 3 A schematic diagram of the structure in a longitudinal direction or in the outer shell.

[0016] Figure 5 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0017] Figure 6This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0018] Figure 7 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0019] Figure 8 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0020] Figure 9 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0021] Figure 10 yes Figure 9 A structural schematic diagram in sectional view (AA).

[0022] Figure 11 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0023] Figure 12 yes Figure 11 A structural schematic diagram of a cross-section of the middle section (BB).

[0024] Figure 13 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0025] Figure 14 yes Figure 13 A schematic diagram of the principle structure of the locking buckle and locking buckle mechanism.

[0026] Figure 15 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0027] Figure 16 Is with Figure 15 A schematic diagram of the structure of the inner cover plate that is matched in the middle.

[0028] Figure 17 yes Figure 15 A schematic diagram of the principle structure in the energy storage and release state.

[0029] Figure 18 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0030] Figure 19 Is with Figure 18 A schematic diagram of the structure in which the energy storage spring is located on one side of the inner cover plate.

[0031] Figure 20 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0032] Figure 21 This is a schematic diagram of the principle structure of another embodiment of the present invention in the energy storage and locking state.

[0033] In the diagram: 1. Outer cover, 10. Shaft latch mechanism slide groove, 12. Mechanism slide groove, 13. Buckle slide groove, 15. Locking pin slide groove, 16. Metallic wire tube, 17. Manual energy storage button, 18. Shell support point, 2. Inner cover plate, 20. Locking groove, 28. Cover support point, 3. Energy storage spring, 30. Unlocking pull rope connection point, 31. Unlocking pull rope, 32. Connecting buckle, 34. Wire tube fixing end, 36. Pull rope return spring, 37. 4. Pressure-bearing step; 5. Bimetallic device; 6. Heat-shrinkable metal wire; 7. Snap-on device; 8. Locking buckle; 9. Locking pin; 10. Locking buckle mechanism; 11. Sloping concave step; 12. Buckle mechanism pivot; 13. External pressure ball; 24. Buckle spring; 15. Hook; 26. Return spring; 37. Buckle pivot; 48. Mechanism pull rope; 59. Buckle return spring; 60. Door body or lock panel; 10. Isolation bracket. Detailed Implementation

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 , Figure 11 and Figure 12 , Figure 13 and Figure 14 , Figure 15 and Figure 16 and Figure 17 , Figure 18 and Figure 19 , Figure 20 , Figure 21 As shown in the figure, the components include: an outer cover 1, an inner cover 2, an energy storage spring 3, a bimetallic device 4, a locking buckle 5, and a locking buckle mechanism 51. The bimetallic device 4 is provided on one side of the outer cover 1 and the inner cover 2. The key features are: an energy storage spring 3 is provided on one side of the outer cover 1; a locking buckle 5 is provided in the outer cover 1 to put the energy storage spring 3 into an energy storage state; a locking buckle mechanism 51 that matches the locking buckle 5 and can be driven by the thermal deformation of the bimetallic device 4; and a reset spring 52 that helps the locking buckle mechanism 51 to reset. The locking buckle 5 can disengage from the energy storage spring 3 as the locking buckle mechanism 51 moves in the unlocking direction, so that the elastic force released from one end of the energy storage spring 3 can drive the unlocking pull rope connection point 30 located on one side of the outer cover 1 and the inner cover 2 and drive the unlocking pull rope 31 to achieve the required unlocking. The inner cover 2 is correspondingly located on the same side of the outer cover 1 where the locking buckle 5 is located.

[0035] This invention can be implemented as follows Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 5 , Figure 6 , Figure 9 and Figure 10 , Figure 11 and Figure 12 , Figure 15 and Figure 16 and Figure 17 , Figure 18 and Figure 19 , Figure 21 As shown, the bimetallic device 4 is a nickel-titanium alloy heat-shrinkable wire 41. The heat-shrinkable wire 41 can optionally be arranged on the outer side near the outer cover 1. One end of the heat-shrinkable wire 41 can be directly or indirectly fixedly connected to the outer cover 1, and the other end can be directly or indirectly connected to the locking mechanism 51. The invention can also be implemented as follows... Figure 7 , Figure 8 , Figure 13 and Figure 14 , Figure 20 As shown, the bimetallic device 4 is configured as a snap-action device 43 that can generate sudden deformation and tension or thrust under a certain temperature difference. One end of the snap-action device 43 is connected and fixed to the outer cover shell 1, and the end of the snap-action device 43 that can generate the required deformation amplitude is connected to the locking buckle mechanism 51 through the mechanism pull rope 55.

[0036] This invention can be implemented as follows Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 11 and Figure 12 , Figure 15 and Figure 16 and Figure 17 , Figure 18 and Figure 19 , Figure 20 , Figure 21 As shown, a metallic wire tube 16 is provided on the outside of the unlocking pull rope connection point 30. The metallic wire tube 16 is a flexible hose or a rigid tube or grooved tube that cannot be bent. One end of the metallic wire tube 16 can be directly or indirectly connected and fixed to the outer cover shell 1 or the inner cover plate 2 for support. The other end of the metallic wire tube 16 can be used to connect and fix to the lock or the door panel for support. The unlocking pull rope 31 is directly or indirectly connected to the unlocking component or unlocking force arm in the lock that can open the lock body by penetrating the metallic wire tube 16.

[0037] This invention can be implemented as follows Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 , Figure 9 , Figure 11 , Figure 13 As shown, an isolation bracket 60 is provided on one side of the outer cover 1 or one side of the inner cover 2 to keep the bimetallic device 4 at a certain distance from the door or lock panel 6.

[0038] This invention can be implemented as follows Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the outer cover 1 has a mechanism groove 12 that matches the locking mechanism 51. The mechanism groove 12 contains a locking mechanism 51 with a sloping concave step 53. On one side of the outer cover 1, which corresponds to the sloping concave step 53 of the locking mechanism 51, there is a latch groove 13 that matches the locking latch 5. The locking latch 5 has a circular cross-section. The locking latch 5 can be moved in the unlocking direction with the locking mechanism 51 and can be completely placed in the latch groove 13. The return spring 52 is provided at one end of the mechanism corresponding to the locking mechanism 51. In the slide groove 12, the inner cover plate 2 adjacent to the snap slide groove 13 is provided with a locking groove 20 that can cooperate with the outer side of the locking buckle 5 for locking and can help to press the locking buckle 5 into the snap slide groove 13 when needed; the energy storage spring 3 can be a torsion spring or a push-pull spring, one end of the energy storage spring 3 is connected to the outer cover shell 1 for support, and the other end is connected to the inner cover plate 2 for support; the unlocking pull rope connection point 30 can be provided on one end of the energy storage spring 3 that can release the elastic force or on the side of the outer cover shell 1 or inner cover plate 2 that the energy storage spring 3 can drive to move.

[0039] This invention can be implemented as follows Figure 9 and Figure 10 , Figure 11 and Figure 12 , Figure 13 and Figure 14As shown, the locking buckle 5 and the locking mechanism 51 are integrated into a "Z" shape, or a straight or curved column. One end is the locking buckle 5, and the other end is the locking mechanism 51. A locking mechanism pivot 510 is provided between the two ends. The outer cover 1 is provided with a pivot locking mechanism groove 10 that can be used and installed with the locking buckle 5 and the locking mechanism 51 containing the pivot locking mechanism 510. The locking buckle 5 can rotate and move with the locking mechanism 51 in the unlocking direction and can be completely placed in the pivot locking mechanism. In the sliding groove 10; the reset spring 52 can be a torsion spring, which is set on the outside of the buckle mechanism rotating shaft 510; the energy storage spring 3 can be set as a torsion spring with one end connected to the outer cover shell 1 and the other end connected to the locking buckle 5, or a push-pull spring with one end connected to the outer cover shell 1 and the other end connected to the inner cover plate 2; the unlocking pull rope connection point 30 can be set on one end of the energy storage spring 3 that can release the elastic force or on one side of the inner cover plate 2 that the energy storage spring 3 can drive.

[0040] This invention can be implemented as follows Figure 15 and Figure 16 and Figure 17 , Figure 18 and Figure 19 , Figure 20 , Figure 21As shown, a locking post 50 is provided at one end of the energy storage spring 3, which can support each other and be used for energy storage and locking. The locking post is cylindrical, and a manual energy storage button 17 is provided on one side perpendicular to the axis of the cylindrical shape, which can manually push the locking post 50 and the energy storage spring 3 to deform and store energy. A locking post groove 15 is provided in the outer cover shell 1, which can match the locking post 50. The locking buckle 5 has a "V" shape on its inner side and can cooperate with the locking post groove 15, so that the locking buckle 5 can lock the elastic force of the locking post 50 and the energy storage spring 3. A buckle rotating shaft 54 ​​is provided in the locking buckle 5, which can be rotated. The locking buckle 5 is installed in the inner side of the outer cover shell 1 through its buckle rotating shaft 54. A buckle return spring 57 is provided on the locking buckle 5 to help it unlock and reset. A buckle mechanism rotating shaft 510 is also provided in the locking buckle mechanism 51, which can be rotated. The locking buckle mechanism 51 is connected to the locking buckle mechanism through its buckle mechanism. The rotating shaft 510 is installed inside the outer cover 1. A hook 514 is provided at one end of the locking mechanism 51, which can rotate around the rotating shaft 510 and control the locking buckle 5 to be in a locked or unlocked state. The end of the hook 514 that cooperates with the locking buckle 5 is hook-shaped. A return spring 52 is also provided on the rotating shaft 510 to help the hook 514 and the locking buckle 5 to lock together. The energy storage spring 3 can be a push-pull spring or a torsion spring. The energy storage spring 3 is provided on one side of the outer cover 1 and the inner cover plate 2. One end of the energy storage spring 3 is connected to the outer cover 1 or the inner cover plate 2 that is fixed to the outer cover 1 for support, and the other end is connected to the locking post 50 that can cooperate with the locking buckle 5 for support. The unlocking pull rope connection point 30 can be provided on the side connected to the locking post 50 to form a manual energy storage button 17, or on the end of the energy storage spring 3 that can release the energy storage force, or on the locking post 50.

[0041] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 , Figure 11 and Figure 12 , Figure 13 and Figure 14 , Figure 15 and Figure 16 and Figure 17 , Figure 18 , Figure 19 , Figure 20 , Figure 21As shown, the outer cover 1, inner cover 2, locking buckle 5, and locking buckle mechanism 51 of this invention can be made of high-temperature resistant metal materials, such as iron, copper, or steel. Nickel-titanium heat-shrinkable wire or bimetallic sheets that easily deform under heat can be selected as needed to set and manufacture the bimetallic device 4 in this invention. The specific size and shape of the bimetallic device 4 can be determined according to actual needs. An energy storage spring 3 suitable for this invention can be set or selected according to the required unlocking force and stroke of the unlocking component in the lock. The bimetallic device 4 is installed on one side of the outer cover 1 and the inner cover 2. Figures 1 to 14 As shown, it is best to install the bimetallic device 4 on or within the outer surface of the outer cover 1, so that it can quickly detect the heat source of the fire; Figures 15 to 21 As shown, the bimetallic device 4 can be installed on or within the outer surface layer near the outer cover 1, or it can be installed as needed. Figure 16 The outer surface of the inner cover plate 2 shown (not shown in the figure) can be positioned such that the bimetallic device 4 can quickly sense the heat source of the fire without affecting the normal operation of the system. Then, select one side of the outer cover shell 1 that facilitates the installation and use of the energy storage spring 3 and does not conflict with the bimetallic device 4, and install the energy storage spring 3 thereon. A locking buckle 5 is then installed in the outer cover 1 to hold the energy storage spring 3 in an energy storage state. A locking buckle mechanism 51, matching the locking buckle 5 and driven by the thermal deformation of the bimetallic device 4 to move in the unlocking direction, is also installed in the outer cover 1. A return spring 52 is also installed in the outer cover 1 to help the locking buckle mechanism 51 return to its locked position. This allows the locking buckle 5 to disengage from the energy storage spring 3 as the locking buckle mechanism 51 moves in the unlocking direction. The elastic force released from one end of the energy storage spring 3 drives the unlocking pull rope connection point 30 located on one side of the outer cover 1 and the inner cover 2, and drives the unlocking pull rope 31 to achieve the desired unlocking. See also the following for further details. Figure 1 , Figure 5 , Figure 7 , Figure 12 As shown in the figure, the unlocking pull rope connection point 30 is installed on one side of the inner cover plate 2; see also the reference as follows Figure 2 , Figure 8 As shown in the figure, the unlocking pull cord connection point 30 is installed on one side of the outer cover 1; see also reference as... Figure 3 , Figure 6 , Figure 9 , Figure 13 As shown, the unlocking pull cord connection point 30 is located on the end of the energy storage spring 3 that can release the elastic force, which is installed on one side of the outer cover 1 or the inner cover 2; it can also be arranged as follows: Figure 15 , Figure 17 , Figure 19 , Figure 20 , Figure 21 As shown, the connection point 30 of the unlocking pull rope is installed on the manual accumulator button 17 or the locking pin 50 located on one side of the outer cover. The inner cover plate 2 is then installed on the same side of the outer cover 1 where the locking buckle 5 is located, thus also providing protection for the locking buckle 5 from external interference.

[0042] This invention can be referred to Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 5 , Figure 6 , Figure 9 and Figure 10 , Figure 11 and Figure 12 , Figure 15 and Figure 16 and Figure 17 , Figure 18 and Figure 19 , Figure 21 As shown, the bimetallic device 4 is configured as a nickel-titanium alloy heat-shrinkable wire 41. The type and length of the heat-shrinkable wire can be selected according to actual needs, such as a heat-shrinkable wire with a critical temperature between 60℃ and 95℃ or 120℃. For heat-shrinkable wires with relatively low heat-shrinkability, multiple strands of heat-shrinkable wires can be connected in parallel to increase their heat-shrinkability. In order to facilitate the rapid and effective sensing of ambient temperature by the heat-shrinkable wire 41, it is best to arrange the heat-shrinkable wire 41 on or within the outer surface layer near the outer cover 1. This can be achieved by creating a groove on the inner side of the outer cover 1 to arrange and install the heat-shrinkable wire 41, or by creating a groove or thread hole on the outer side of the outer cover 1 to arrange and install the heat-shrinkable wire 41. One end of the heat-shrinkable metal wire 41 is then directly connected to the outer cover 1 or indirectly connected to the outer cover 1 via a steel wire rope or a terminal block. The other end of the heat-shrinkable metal wire 41 is then directly connected to the locking mechanism 51 or indirectly connected via a steel wire rope or a transmission rod, as needed, to ensure that the heat-shrinkable metal wire 41 can shrink at a predetermined temperature and pull the locking mechanism 51, thereby allowing the locking buckle 5 to disengage from the energy storage spring 3. This invention can also be implemented as follows... Figure 7 , Figure 8 , Figure 13 and Figure 14 , Figure 20As shown, the bimetallic device 4 is configured as a snap-fit ​​device 43 capable of generating sudden deformation and tensile or thrust forces under a certain temperature difference. The structural principles of existing bimetallic snap-fit ​​devices and suitable bimetallic materials for manufacturing the snap-fit ​​device of this invention can be selected to fabricate a snap-fit ​​device 43 suitable for the external structure of this invention. Options such as... can be selected as needed. Figure 7 , Figure 8 , Figure 13 The bowl-shaped spring mechanism shown in the diagram can also be selected as needed. Figure 20 The principle structure of the snap-action device shown is a concave arc surface. One end of the snap-action device 43 is then connected and fixed to the outer cover 1. The end of the snap-action device 43 that can generate the required deformation amplitude is then connected to the locking mechanism 51 through the pull rope 55 to ensure that the snap-action device 43 can snap at the agreed temperature and pull the locking mechanism 51, thereby allowing the locking buckle to disengage from the energy storage spring 3.

[0043] This invention can be referred to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 11 and Figure 12 , Figure 15 and Figure 16 and Figure 17 , Figure 18 and Figure 19 , Figure 20 , Figure 21As shown, a metallic wire tube 16 is installed on the outside of the unlocking pull rope connection point 30. The metallic wire tube 16 can be a flexible hose or a rigid or grooved tube that cannot be bent. A flexible hose can be used, such as the steel wire tube used for handbrakes in bicycles and motorcycles, or the steel wire tube used for tension brakes in motor vehicles, to manufacture the metallic wire tube 16 of this invention. Alternatively, the steel wire tubes from bicycles, motorcycles, or motor vehicles can be directly used in this invention according to the required length. The metallic wire tube 16 of this invention can also be a flexible metal air pipe, like that used in air conditioners, as long as the force transmitted from the bimetallic device 4 to the unlocking pull rope 31 can act on the lever arm in the lock and drive the unlocking component to perform the required unlocking. One end of the metallic wire tube 16 can be directly connected and fixedly supported to the outer cover shell 1 or the inner cover plate 2; alternatively, it can be indirectly connected and fixedly supported, for example, by fixing one end of the metallic wire tube 16 to an isolation bracket 60 that is fixedly connected to the outer cover shell 1 or the inner cover plate 2, or to a door body or lock panel 6 that is fixedly connected to the isolation bracket (not shown in the figure). The other end of the metallic wire tube 16 is then connected and fixedly supported to the lock or door panel. The unlocking pull rope 31 is then passed through the metallic wire tube 16, so that in practical applications, the unlocking pull rope 31 can be easily directly or indirectly connected to the unlocking component or unlocking lever arm in the lock that can be pulled open by the unlocking pull rope 31. The metallic wire tube 16 described in this invention can also be made into a rigid tube or grooved tube that is not easily bent, as needed; the outer cover 1 or inner cover plate 2 can also be made together with the metallic wire tube on the panel of the lock, as needed; or a rigid tube or a grooved or tube-shaped metallic wire tube can be made of metallic material or non-metallic refractory material with steel toughness, which can directly pass the unlocking pull rope 31 through the outside of the door body or the lock panel 6, or can pass through the inside of the lock, as long as the unlocking pull rope 31 can be effectively acted on the linear lever arm provided in the lock and drive the unlocking component to perform the required unlocking. The metallic wire tube 16 described in this invention is designed to facilitate the insertion of the unlocking pull rope 31 into the lock and to protect and position the unlocking pull rope 31. Therefore, regardless of the aperture size and length of the metallic wire tube 16, as long as it allows the unlocking pull rope 31 to pass through and prevents it from being disturbed by external forces, it falls within the scope of the metallic wire tube 16 of this invention. This invention can also be consulted as needed. Figure 9 and Figure 10 , Figure 13 and Figure 14 As shown, the unlocking pull rope 31 is applied directly or indirectly to the unlocking component or unlocking lever in the lock that can open the lock body without passing through the metal wire tube 16.

[0044] This invention can be referred to as follows Figure 1, Figure 2 , Figure 3 , Figure 7 , Figure 8 , Figure 9 , Figure 11 As shown, an isolation bracket 60 is installed on one side of the outer cover 1 or one side of the inner cover 2 to maintain a certain distance between the bimetallic device 4 and the door or lock panel 6. The isolation bracket 60 can be fixedly connected to the door or lock panel 6 using riveting and welding techniques; alternatively, the isolation bracket 60 containing the inner cover 2 and outer cover 1 can be manufactured together with the lock panel according to the product's function and structural requirements.

[0045] This invention can be referred to as follows Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, a mechanism groove 12 matching the locking mechanism 51 is provided in the outer cover shell 1, and a locking mechanism 51 containing a sloping concave step 53 is provided in the mechanism groove 12. A locking groove 13 matching the locking buckle 5 is also provided on one side of the outer cover shell 1 corresponding to the sloping concave step 53 of the locking mechanism 51. To facilitate the effective release of the energy storage spring 3 by the locking buckle 5 and prevent the locking buckle 5 from jamming due to the friction between the outer cover shell 1, the inner cover plate 2, and the locking buckle 5 generated by the energy storage spring 3, the cross-section of the locking buckle 5 can be set to be circular or spherical, so that the locking buckle 5 can be completely placed in the locking groove 13 as it moves in the unlocking direction with the locking mechanism 51. The reset spring 52 is then installed in the mechanism groove 12 corresponding to one end of the locking mechanism 51. Furthermore, a locking groove 20 is provided in the inner cover plate 2 adjacent to the locking groove 13. This groove can cooperate with the outer side of the locking buckle 5 for locking and, when needed, help to press the locking buckle 5 into the locking groove 13. To optimize the fit of the spherical locking buckle 5, the inner side of the locking groove 13 can be set into a trapezoidal shape. The inclined surface of the trapezoidal shape presses the locking buckle 5 into the locking groove 13, eliminating any frictional resistance. The energy storage spring 3 can be selected from... Figures 1 to 3 , Figure 8 Torsion springs or such Figures 5 to 7 The energy storage spring 3 has one end supported by the outer cover shell 1 and the other end supported by the inner cover plate 2. The unlocking pull rope connection point 30 can be installed on one end of the energy storage spring 3 that can release the elastic force or on the side of the outer cover shell 1 or inner cover plate 2 that the energy storage spring 3 can drive to move.

[0046] To facilitate adjustment of the tension or length of the unlocking cord 31, ensuring that the spring force released by the energy storage spring effectively unlocks the device as intended, in actual manufacturing, the unlocking cord connection point 30 can be configured as follows: Figure 8 , Figure 20 As shown, the unlocking pull rope connection point 30 is set as a wire hole through which the unlocking pull rope 31 can pass and a pair of screws that can communicate with the wire hole. This allows for optimal adjustment of the unlocking pull rope according to the thickness of different doors or the installation position.

[0047] This invention may also be referred to as Figure 9 and Figure 10 , Figure 11 and Figure 12 , Figure 13 and Figure 14 As shown, the locking buckle 5 and the locking buckle mechanism 51 are integrated into a "Z" shape, a straight column, or a curved column, with one end designated as the locking buckle 5. To facilitate the energy storage spring 3 entering the locked state, the locking buckle 5 can be designed as a sloping wedge, and the other end is designated as the locking buckle mechanism 51. A locking mechanism pivot 510 is then provided between the two ends. A pivot mechanism groove 10 is provided in the outer cover 1 to accommodate and install the locking buckle 5 and the locking buckle mechanism 51 containing the pivot mechanism pivot 510, ensuring that the locking buckle 5 can be fully positioned within the pivot mechanism groove 10 as the locking buckle mechanism 51 rotates in the unlocking direction. For ease of installation and use, a torsion spring can be used as the return spring 52, and it is installed on the outside of the locking mechanism pivot 510. The energy storage spring 3 can be selected from... Figure 8 , Figure 9 The torsion spring shown is configured such that one end is supported by the outer cover 1 and the other end is supported by the locking buckle 5, or see [reference needed]. Figure 11 and Figure 12 As shown, a push-pull spring is selected, with one end connected to the outer cover 1 and the other end connected to the inner cover 2. The unlocking pull rope connection point 30 can be installed on one end of the energy storage spring 3 that can release the elastic force, or on one side of the inner cover 2 that the energy storage spring 3 can drive.

[0048] The present invention can also be adapted as follows Figure 15 and Figure 16 and Figure 17 , Figure 18 and Figure 19 , Figure 20 , Figure 21As shown, a locking post 50 is installed at one end of the energy storage spring 3, which is connected to the end of the energy storage spring 3 that can release its elastic force and can withstand the deformation elastic force of the energy storage spring 3. The locking post 50 is cylindrical in shape. In order to enable the locking post 50 to withstand the elastic force of the energy storage spring and to facilitate the external force to drive the energy storage spring to store energy, the present invention can be referred to... Figure 15 and Figure 17 , Figure 20 , Figure 21 As shown, a push-pull spring is used as the energy storage spring 3, and a manual energy storage button 17 with a cross-shaped pressure-bearing step 37 is provided on the outer side of the force-bearing column 50. The manual energy storage button 17 described in the specification and accompanying drawings refers to the energy storage spring that can be manually charged by applying external force. The required energy storage spring 3 is provided between the cross-shaped pressure-bearing step 37 and one side of the outer cover 1. A locking post groove 15 for locking and releasing the locking post 50 is provided on one end of the outer cover 1. The locking buckle 5 is made with an inner "V" shape and can cooperate with the locking post groove 15 to meet the need for locking the locking post 50, so that the locking buckle 5 can lock the locking post 50 and the elastic force of the energy storage spring 3. A rotating shaft 54 ​​is then installed in the locking buckle 5 to allow it to rotate, and the locking buckle 5 is installed inside the outer cover 1 via its rotating shaft 54. A return spring 57 is also installed on the locking buckle 5 to help it unlock and reset. A rotating shaft 510 is also installed in the locking mechanism 51 to allow it to rotate, and the locking mechanism 51 is installed inside the outer cover 1 via its rotating shaft 510. A hook 514 is provided at one end of the locking mechanism 51, which can rotate around the rotating shaft 510 and control the locking buckle 5 to be in a locked or unlocked state. The end of the hook 514 that engages with the locking buckle 5 is shaped like a hook. A return spring 52 is installed on the rotating shaft 510 to help the hook 514 and the locking buckle 5 lock together. Then, the energy storage spring 3, which can interact with the pressure-bearing step 37, and the manual energy storage button 17 containing the locking pin 50 are installed as follows: Figure 15 and Figure 17 , Figure 20 , Figure 21 The side corresponding to the locking pin groove 15 shown. See also... Figure 15 and Figure 17 As shown, the unlocking pull rope connection point 30 is installed on one side of the manual accumulator button 17 connected to the locking pin 50, or see [reference needed]. Figure 19 As shown, the unlocking pull rope connection point 30 is installed on the end of the energy storage spring 3 that can release the energy storage force or on the locking post 50.

[0049] The aforementioned energy storage spring 3 can also be referred to. Figure 18 and Figure 19 As shown, a torsion spring is selected as the energy storage spring 3 of the present invention. The energy storage spring 3 can be installed on one side of the outer cover 1 and the inner cover 2, with one end connected to the outer cover 1 or the inner cover 2 fixed to the outer cover 1 for support, and the other end connected to the locking pin 50 that can cooperate with the locking buckle 5 for support; the unlocking pull rope connection point 30 is installed on the side connected to the locking pin 50 to form the manual energy storage button 17, or installed on the end of the energy storage spring 3 that can release the energy storage force, or installed on the locking pin 50.

[0050] To ensure that the connecting buckle 32 and the unlocking pull rope 31 in this invention can promptly reset at room temperature and not interfere with the normal use of the lock, this invention can be referred to... Figure 5 , Figure 6 , Figure 7 , Figure 19 , Figure 21 As shown, a pull rope return spring 36 is installed between the outer end of the metallic wire tube 16 and the connecting buckle 32 to help the connecting buckle 32 to be in its original reset state.

[0051] In order to further prevent outdoor heat conduction, the present invention may also install a heat insulation pad between the isolation bracket 60 and the outside of the door or lock panel 6.

[0052] In practical applications, the present invention can be made longer by using the manufacturing process and technology of steel wire tubes as needed. The invention can be applied and installed on the outside of the door or lock panel 6 by gluing, welding or bracket screws, or in a place where it is easy to sense and detect the fire source.

[0053] The association mentioned in this invention refers to both direct connection and indirect transmission connection.

[0054] When using:

[0055] In practical applications, to fully meet the requirements for locks that facilitate fire rescue, this invention transforms electronic or mechanical locks with door handles into windproof passage locks when high temperatures are detected during a fire. Before installation and use, press or turn the manual energy storage button 17 to position the energy storage spring 3 in the energy storage locked state as shown in the embodiment of this invention. In practical applications, the unlocking pull rope 31 of this invention can be connected to the clutch pin tray or push rod or the outer shell of the clutch pin motor force engager in the electronic door lock; or it can be connected to the sliding pin in a mechanical door lock that can be driven by a key to unlock. This allows the locking buckle mechanism 51 to be pulled when the bimetallic device 4 deforms due to high temperatures, releasing the energy storage spring force and driving the unlocking pull rope 31. This enables the clutch pin in the electronic lock to be in the unlocked state or the lock pin in the mechanical door lock to be disengaged. At this time, outdoor rescuers only need to press or turn the door handle to open the door for rescue.

[0056] Other types of door locks can be perfectly used in this invention with the following improvements: For mechanical or electronic locks that use a door handle to open, a main door handle (requiring a key outdoors but not indoors) that can open the main bolt and latch (all bolts) and a secondary door handle that can only open the latch outdoors can be provided. For fully automatic electronic locks, in addition to the motor and escape handle that can open all bolts, a handle that can only be opened by rotating the latch outdoors is also required.

[0057] If the angle of rotation of the door handle required to open the main latch can be set to be smaller than the opening angle required for the latch, the application of this invention can be achieved by controlling the stroke or angle of the unlocking component in the lock by pulling the unlocking rope 31: when in case of fire, the main latch can be opened by the unlocking rope, and the windproof latch can be opened by rescuers by pressing the door handle, the auxiliary door handle, or the latch handle.

[0058] The above embodiments of the present invention are not intended to limit the concept and application of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A lock pick that can be installed on the outside of an interior door and releases its stored energy spring force when exposed to high temperatures during a fire, including: The outer cover (1), inner cover plate (2), energy storage spring (3), heat shrinkable metal wire (41), locking buckle (5) and locking buckle mechanism (51) are provided. The energy storage spring (3) is provided on one side of the outer cover (1). The inner cover plate (2) is correspondingly provided on one side of the outer cover (1) where the locking buckle (5) is located. The feature is that a nickel-titanium alloy heat shrinkable metal wire (41) is provided on the outer side near the outer cover (1). One end of the heat shrinkable metal wire (41) is connected and fixed to the outer cover (1), and the other end of the heat shrinkable metal wire (41) is connected and fixed to the locking buckle mechanism (51). An unlocking pull rope connection point (30) is provided on one side of the outer cover (1) and the inner cover (2). The unlocking pull rope connection point (30) can drive the unlocking pull rope (31) to achieve the required unlocking. The outer cover (1) is provided with a locking buckle (5) that can put the energy storage spring (3) into an energy storage state. The outer cover (1) is also provided with a locking buckle mechanism (51) that can match the locking buckle (5) and can be driven by the thermal deformation of the heat shrinkable metal wire (41) and a reset spring (52) that can help the locking buckle mechanism (51) reset. The locking buckle (5) can disengage from the energy storage spring (3) as the locking buckle mechanism (51) is pulled in the unlocking direction by the heat shrinkable metal wire (41), so that the elastic force released at one end of the energy storage spring (3) can drive the unlocking pull rope connection point (30) provided on one side of the outer cover (1) and the inner cover plate (2) and drive the unlocking pull rope (31) to achieve the required unlocking.

2. The lock pick as described in claim 1, which can be installed on the outside of an interior door and release stored energy upon exposure to high temperatures during a fire, is characterized in that: A metallic wire tube (16) is provided on the outside of the unlocking pull rope connection point (30). The metallic wire tube (16) is a flexible hose or a rigid tube or groove tube that cannot be bent. One end of the metallic wire tube (16) can be directly or indirectly connected to the outer cover (1) or the inner cover plate (2) for fixed support. The other end of the metallic wire tube (16) can be used to connect to the lock or the door panel for fixed support. The unlocking pull rope (31) is directly or indirectly connected to the unlocking component or unlocking lever arm in the lock that can open the lock body by penetrating the metallic wire tube (16).

3. The lock pick as described in claim 1, which can be installed on the outside of an interior door and release stored energy upon exposure to high temperatures during a fire, is characterized in that: An isolation bracket (60) is provided on one side of the outer cover (1) or one side of the inner cover (2) to keep the bimetallic device (4) at a certain distance from the door or lock panel (6).

4. The lock pick as described in claim 1, 2, or 3, capable of being installed on the outside of an interior door and releasing stored energy upon exposure to high temperatures during a fire, characterized in that: The outer cover (1) is provided with a mechanism slide groove (12) that matches the locking mechanism (51). The mechanism slide groove (12) is provided with a locking mechanism (51) containing a sloping concave step (53). On one side of the outer cover (1) that corresponds to the sloping concave step (53) of the locking mechanism (51), there is a latch slide groove (13) that matches the locking buckle (5). The locking buckle (5) has a circular cross-section. The locking buckle (5) can be moved in the unlocking direction with the locking mechanism (51) and can be placed completely in the latch slide groove (13). The return spring (52) is provided at one end of the mechanism slide groove corresponding to the locking mechanism (51). In the groove (12), the inner cover plate (2) adjacent to the snap-slip groove (13) is provided with a locking groove (20) that can cooperate with the outer side of the locking buckle (5) for locking and can help squeeze the locking buckle (5) in the snap-slip groove (13) when needed; the energy storage spring (3) can be a torsion spring or a push-pull spring, one end of the energy storage spring (3) is connected to the outer cover shell (1) for support, and the other end is connected to the inner cover plate (2) for support; the unlocking pull rope connection point (30) can be set on one end of the energy storage spring (3) that can release the elastic force or on the side of the outer cover shell (1) or inner cover plate (2) that the energy storage spring (3) can drive.

5. The lock pick as described in claim 1, 2, or 3, capable of being installed on the outside of an interior door and releasing stored energy upon exposure to high temperatures during a fire, characterized in that: The locking buckle (5) and the locking buckle mechanism (51) are integrated into a "Z" shape, or a straight column or a curved column. One end is the locking buckle (5), and the other end is the locking buckle mechanism (51). A locking mechanism pivot (510) is provided between the two ends. The outer cover (1) is provided with a pivot locking mechanism slide groove (10) that can be used and installed with the locking buckle (5) and the locking buckle mechanism (51) containing the pivot locking mechanism pivot (510). The locking buckle (5) can rotate and move in the unlocking direction with the locking buckle mechanism (51) and can be completely placed in the pivot locking mechanism slide groove. In the groove (10); the reset spring (52) can be a torsion spring, which is set on the outside of the buckle mechanism pivot (510); the energy storage spring (3) can be set as a torsion spring with one end connected to the outer cover shell (1) and the other end connected to the locking buckle (5), or a push-pull spring with one end connected to the outer cover shell (1) and the other end connected to the inner cover plate (2); the unlocking pull rope connection point (30) can be set on one end of the energy storage spring (3) that can release the elastic force or on one side of the inner cover plate (2) that the energy storage spring (3) can drive.

6. The lock pick as described in claim 1, 2, or 3, capable of being installed on the outside of an interior door and releasing stored energy upon exposure to high temperatures during a fire, characterized in that: One end of the energy storage spring (3) is provided with a locking post (50) that can support it and be used for energy storage and locking. The locking post is cylindrical, and a manual energy storage button (17) is provided on one side perpendicular to the axis of the cylindrical shape, which can manually push the locking post (50) and the energy storage spring (3) to deform and store energy. The outer cover (1) is provided with a locking post groove (15) that can match the locking post (50). The locking buckle (5) has a "V" shape on its inner side and can cooperate with the locking post groove (15) to make it so that The locking buckle (5) can lock the locking pin (50) and the spring force of the energy storage spring (3). The locking buckle (5) is provided with a buckle shaft (54) that allows it to rotate. The locking buckle (5) is installed inside the outer cover (1) through its buckle shaft (54). The locking buckle (5) is provided with a buckle reset spring (57) that helps it to unlock and reset. The locking buckle mechanism (51) is also provided with a buckle mechanism shaft (510) that allows it to rotate. The locking buckle mechanism (51) is provided with a buckle mechanism shaft (510) that allows it to rotate. 0) The locking mechanism (51) is installed inside the outer cover (1). At one end of the locking mechanism (51), there is a hook (514) that can rotate around the mechanism shaft (510) and control the locking buckle (5) to be in the locked or unlocked state. The end of the hook (514) that cooperates with the locking buckle (5) is hook-shaped. A return spring (52) is also provided on the mechanism shaft (510) to help the hook (514) and the locking buckle (5) to lock together. The energy storage spring (3) can be a push-pull spring or a torsion spring. The energy storage spring (3) is located on one side of the outer cover (1) and the inner cover (2). One end of the spring is connected to the outer cover (1) or the inner cover (2) which is fixed to the outer cover (1), and the other end is connected to the locking pin (50) which can cooperate with the locking buckle (5). The unlocking pull rope connection point (30) can be located on the side of the manual energy storage button (17) connected to the locking pin (50), or on the end of the energy storage spring (3) that can release the energy storage force, or on the locking pin (50).

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