A lock cylinder assembly with a pick-resistant mechanism and a panic lock

Abstract

This application relates to the field of locks, and more particularly to a lock cylinder assembly with an anti-pry mechanism and an escape lock. A lock cylinder assembly with an anti-pry mechanism includes a lock cylinder housing, a bolt linkage mechanism, and an anti-pry mechanism. The lock cylinder housing is used to install the bolt linkage mechanism and the anti-pry mechanism. The bolt linkage mechanism includes a main bolt and an actuating plate that retracts the bolt when the pressure bar assembly is under force. The anti-pry mechanism includes a safety bolt, a safety reset elastic element that applies an outward force to the safety bolt, and a clutch plate that abuts against the main bolt when the safety bolt is in the retracted state and the pressure bar assembly is not under pressure. When the escape lock is locked, the clutch plate abuts against the main bolt when the safety bolt is in the retracted state and the actuating plate is not under pressure, preventing the main bolt from retracting and thus preventing unauthorized personnel from unlocking the escape lock by pressing the main bolt.

Description

Technical Field

[0001] This application relates to the field of locks, and in particular to a lock assembly with an anti-pry mechanism and an escape lock. Background Technology

[0002] American Standard push-bar escape locks are standard equipment in emergency exits of large supermarkets and retail stores. Their core function is to allow occupants to quickly unlock the door with a single push of the lever, ensuring safety in scenarios such as fires. However, in supermarkets, there are instances of unauthorized individuals using these locks to evade payment. Current solutions to this involve installing sensors within the lock to trigger an alarm when it is opened. However, since the sensor can only be installed within the push-bar, unauthorized individuals can still bypass the push-bar by directly manipulating the latch to unlock the door. For example, they can insert hard cards or thin tools into the door gap to force the latch to retract and unlock. These operations completely circumvent the push-bar's transmission mechanism, causing the sensor to remain silent as it fails to detect any movement of the push-bar or transmission structure, thus rendering the alarm and anti-theft system ineffective.

[0003] To address the aforementioned technical issues, the applicant has designed an escape lock that cannot be unlocked by pressing the bolt back when the escape lock is locked. Utility Model Content

[0004] To prevent criminals from bypassing the alarm and anti-theft system by pressing the bolt to retract and unlock the lock, this application provides a lock head assembly of an anti-pry mechanism and an escape lock.

[0005] Firstly, this application provides an escape lock that employs the following technical solution: A lock assembly with an anti-pry mechanism includes a lock housing, a bolt linkage mechanism, and an anti-pry mechanism. The lock housing is used to install the lock tongue linkage mechanism and the anti-pry mechanism; The latch linkage mechanism includes a main latch and a starter plate that drives the latch to retract when the pressure rod assembly is subjected to force. The anti-pry mechanism includes a safety latch, a safety reset elastic element that applies an outward force to the safety latch, and a clutch plate that abuts against the main lock tongue when the safety latch is in a retracted state and the pressure rod assembly is not compressed.

[0006] By adopting the above technical solution, when the escape lock is locked, the safety tongue is in the retracted state and the starter plate is not pressed to open the main lock tongue, the clutch plate will block the main lock tongue so that the main lock tongue cannot retract, thus preventing unauthorized personnel from unlocking the escape lock by pressing the main lock tongue.

[0007] Preferably, the clutch plate is rotatably connected to the lock housing, and the clutch plate is provided with an elastic element that applies a force to rotate it in the direction of the safety tongue. The safety tongue includes a safety push plate for abutting against the clutch plate. When the safety tongue pops out, the safety push plate drives the clutch plate to rotate.

[0008] By adopting the above technical solution, the elastic element drives the clutch plate to rotate towards the safety latch, so that when the safety latch does not push the clutch plate open, the clutch plate rotates to the locked position and blocks the main lock tongue. When the safety latch pops out, it pushes the clutch plate open and disengages from the locked position, so that the main lock tongue is not obstructed and cannot retract when closing the door.

[0009] Preferably, the safety push plate is provided with a section facing the clutch plate, and the section is inclined away from the clutch plate in the direction in which the safety tongue pops out.

[0010] By adopting the above technical solution, a section that is inclined away from the clutch plate in the direction of the main locking tongue ejection is set so that the clutch plate can be gradually pushed out of the locking position during the ejection of the safety tongue.

[0011] Preferably, the safety push plate is provided with a first straight section, a curved section, an inclined section, and a second straight section in sequence on the side facing the clutch plate. The curved section and the inclined section are inclined away from the clutch plate in the direction of the main locking tongue ejection. The slope of the inclined section is greater than the slope of the curved section. The curved section is a concave curve. The clutch plate has a clutch protrusion on the side facing the safety push plate in the middle.

[0012] By adopting the above technical solution, when the clutch protrusion moves from the second straight section to the inclined section during the process of the safety push plate pushing the clutch plate, it first causes the clutch plate to quickly lift up and disengage from the locked position, and then slowly lifts up after passing through the curved section until it reaches the first straight section.

[0013] Preferably, the main bolt is rotatably connected to the lock head housing via a first bolt center bolt, the actuating plate is rotatably connected to the lock head housing via an actuating plate center bolt, the clutch plate is provided with a clutch force-bearing component that abuts against the actuating plate on the side facing the main bolt, the lower side of the clutch plate away from the actuating plate center bolt is provided with a clutch groove, the clutch groove is provided with a clutch force-bearing surface in the direction of movement of the limit rod, and when the limit rod abuts against the clutch force-bearing surface, the direction of the force applied to the clutch force-bearing surface is in the direction that drives the clutch plate to rotate towards the safety push plate.

[0014] By adopting the above technical solution, when the limit rod abuts against the clutch force surface, the force applied to the clutch force surface causes the clutch plate to rotate towards the safety push plate. When the clutch plate abuts against the safety push plate, it cannot rotate, and the limit rod cannot drive the clutch plate to move. Therefore, in the locked state, when the main bolt is pressed, the limit rod will not cause the clutch plate to lift, and thus it is impossible to unlock by pressing the main bolt.

[0015] Preferably, when the main latch is in the pop-out state and the safety latch is in the retracted state, there is a gap between the limit rod and the clutch force-bearing surface, and the starting plate abuts against the clutch plate earlier than it abuts against the main latch during rotation.

[0016] By adopting the above technical solution, when the main latch is in the pop-out state and the safety latch is in the retracted state, there is a gap between the limit rod and the clutch force surface, or the starter plate abuts against the clutch plate earlier than it abuts against the main latch during rotation. This allows the starter plate to be lifted by the clutch force component before the limit rod abuts against the clutch plate when pressed, without affecting the normal door opening action.

[0017] Preferably, the safety latch includes a safety base plate located between the main latch and the lock head base plate, and safety side plates extending from both sides of the safety base plate toward the upper and lower sides of the main latch. The safety push plate is provided in two pieces and is located on the opposite side of the safety side plates. The opposite side of the two safety push plates abuts against the inner wall of the lock head housing. The safety side plates are provided with avoidance holes for avoidance limit rods.

[0018] By adopting the above technical solution, when the main locking tongue retracts, the limiting rod will abut against the inner wall of the clearance hole to drive the safety tongue to retract.

[0019] Preferably, the width of the clearance hole gradually decreases in the direction of the safety tongue ejection, and the inner wall of the larger end of the clearance hole is provided with an inclined guide surface, which is inclined in the direction away from the clutch plate towards the direction of the safety tongue ejection.

[0020] By adopting the above technical solution, an inclined guide surface is set to slowly guide the transition between the contact position of the limiting rod and the inner wall of the avoidance hole.

[0021] Preferably, the start plate has a start sub-plate on the side facing away from the main bolt. The start sub-plate includes a fitting section that fits and connects with the start plate, and an abutting section that forms an acute angle with the fitting section. A cross switch is installed on the lock head base plate at a position corresponding to the start sub-plate. The cross switch has an oblique abutting surface formed on it that cooperates with the abutting section.

[0022] By adopting the above technical solution, when the cross switch is rotated, the angle between the inclined surface of the cross switch and the starting plate changes, which pushes the starting plate, thereby causing the starting plate to rotate and driving the main lock tongue to complete the unlocking action.

[0023] Secondly, this application provides an escape lock, specifically employing the following technical solution: An escape lock, characterized in that it includes a pressure rod assembly, a sealing seat, and the aforementioned lock cylinder assembly. The lock cylinder housing includes a lock cylinder base plate and an upper seat. The upper seat includes a lock cylinder top plate and two lock cylinder side plates that are bent and extended towards the lock cylinder base plate on both sides of the lock cylinder top plate. The upper seat is fixedly connected to the lock cylinder base plate through the two lock cylinder side plates. A latch rivet seat is installed on the side of the lock cylinder top plate facing the lock cylinder base plate. The latch rivet seat includes a limiting top plate that is attached to the lock cylinder top plate and fixed by bolts, and a limiting top plate extending from the limiting top plate. The plate has limiting side plates that bend towards the bottom plate of the lock head on both the upper and lower sides. The center bolt of the first lock tongue passes through the two limiting side plates. The main lock tongue is located between the two limiting side plates. The main lock tongue includes an integrally formed locking part and a hinge part. The center bolt of the first lock tongue passes through the main lock tongue from the position of the hinge part. The height of the hinge part is equal to the distance between the two limiting side plates. The pressure bar assembly includes a lower sleeve, an upper sleeve, and a rear cover plate. The lower sleeve is U-shaped, and outer limiting elements are formed on the inner walls of both sides of the opening side of the lower sleeve. The upper sleeve has two sides, one inside the lower sleeve and one outside the lower sleeve. The outer limiting protrusion is located on the side of the inner limiting protrusion facing outwards from the lower sleeve, and there is a gap between the outer limiting protrusion and the inner limiting protrusion. The upper sleeve has two sides, one inside the lower sleeve, with first movable limiting protrusions formed on both sides. The distance between the opposing sides of the two first movable limiting protrusions is greater than the distance between the two inner limiting protrusions. The upper sleeve has two sides, one outside the lower sleeve, with second movable limiting protrusions formed on both sides. The distance between the opposing sides of the two second movable limiting protrusions is greater than the distance between the two outer limiting protrusions. The rear cover plate is located at the end of the lower sleeve furthest from the lock assembly. Fixed limiting protrusions are formed on both sides of the rear cover plate. The distance between the opposing sides of the two fixed limiting protrusions is greater than both the distance between the two inner limiting protrusions and the distance between the two outer limiting protrusions. The two fixed limiting protrusions are located between the inner and outer limiting protrusions, and the thickness of the fixed limiting protrusions is equal to the distance between the inner and outer limiting protrusions.

[0024] By adopting the above technical solution, the lock cylinder housing is composed of a lock cylinder base plate and an upper seat, which are used to install structures such as the bolt rivet, main bolt, and actuating plate. The bolt rivet restricts the position of the main bolt, allowing it to rotate only relative to the center bolt of the first bolt. The upper sleeve of the pressure rod assembly can be pressed relative to the lower sleeve without detaching from it.

[0025] By adopting the above technical solution, the rear cover plate can be installed and fixed on the lower sleeve.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. When the escape lock is engaged, the safety tongue is in the retracted state and the starter plate is not pressed to open the main lock tongue. The clutch plate will block the main lock tongue, preventing it from retracting and thus preventing unauthorized personnel from unlocking the escape lock by pressing the main lock tongue.

[0027] 2. When the main bolt is in the pop-out state and the safety bolt is in the retracted state, a gap is left between the limit rod and the clutch force surface so that when the start plate is pressed, the clutch plate can be lifted by the clutch force component before the limit rod and the clutch plate abut against each other, without affecting the normal door opening action; when the limit rod abuts against the clutch force surface, the force applied to the clutch force surface causes the clutch plate to rotate towards the safety push plate, so that when the main bolt is pressed in the locked state, the limit rod will not lift the clutch plate, and therefore it is impossible to unlock by pressing the main bolt. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the escape lock installed on the door according to an embodiment; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the lock assembly in the embodiment; Figure 4 This is a schematic diagram of the lock assembly after the upper seat is hidden in the embodiment; Figure 5 This is a schematic diagram of the cooperative structure of the starter plate, cross switch, and main bolt in the embodiment; Figure 6 This is a schematic diagram of the lock assembly after concealing the upper seat, bolt rivet seat, and main bolt in the embodiment; Figure 7 This is a schematic diagram of the structure of the main locking tongue and the safety tongue cooperating in the embodiment; Figure 8 This is a schematic diagram of the lock assembly in the locked state in the embodiment; Figure 9 This is a schematic diagram of the lock assembly in the unlocked state in the embodiment; Figure 10 This is a schematic diagram of the structure of the retractable head component after unlocking and retracting in the embodiment.

[0029] Explanation of reference numerals in the attached drawings: 1. Pressure bar assembly; 2. Lock head assembly; 3. Sealing seat; 4. Lower sleeve; 5. Upper sleeve; 6. Rear cover plate; 7. Outer limiting protrusion; 8. Inner limiting protrusion; 9. First movable limiting protrusion; 10. Second movable limiting protrusion; 11. Fixed limiting protrusion; 12. Lock head housing; 13. Lock tongue linkage mechanism; 14. Anti-pry mechanism; 15. Lock head base plate; 16. Upper seat; 17. Lock head top plate; 18. Lock head side plate; 19. Actuating plate; 20. Main lock tongue; 21. Actuating auxiliary plate; 22. Fitting section; 23. Abutting section; 24. Cross switch; 25. Angled abutment surface; 26. Lock tongue rivet seat; 27. Limiting top plate; 28. Limiting side plate; 29. First locking tongue center bolt; 30. Locking part; 31. Hinge part; 32. First torsion spring; 33. Safety tongue; 34. Safety return spring; 35. Clutch plate; 36. Second torsion spring; 37. Safety base plate; 38. Safety side plate; 39. Safety push plate; 40. Clearance hole; 41. Angled guide surface; 42. Guide hole; 43. Safety positioning bolt; 44. Limiting plate; 45. Fixing post; 46. First straight section; 47. Curved section; 48. Inclined section; 49. Second straight section; 50. Torsion spring slot; 51. Clutch protrusion; 52. Clutch groove; 53. Clutch force-bearing component; 54. Limiting rod; 55. Starter plate center bolt; 56. Clutch force-bearing surface. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0031] This application discloses an escape lock. The terms "up", "down", "left" and "right" used in the embodiments are schematic representations of relative directions and are not restrictions on the positional relationship.

[0032] like Figure 1 and Figure 2As shown, the escape lock includes a pressure rod assembly 1, a lock head assembly 2, and a sealing seat 3. The lock head assembly 2 is located at the end of the pressure rod assembly 1 near the sealing seat 3, and the locking action is completed through the cooperation of the lock head assembly 2 and the sealing seat 3. The pressure rod assembly 1 includes a lower sleeve 4, an upper sleeve 5, and a rear cover plate 6. The lower sleeve 4 is U-shaped, and the open side of the lower sleeve 4 faces away from the door panel during installation. Both inner walls of the open side of the lower sleeve 4 are formed with an outer limiting protrusion 7 and an inner limiting protrusion 8. The outer limiting protrusion 7 is located on the side facing outward from the lower sleeve 4, and there is a gap between the outer limiting protrusion 7 and the inner limiting protrusion 8. The upper sleeve 5 has first movable limiting protrusions 9 formed on both the upper and lower sides of the side inside the lower sleeve 4. The gap between the opposite sides of the two first movable limiting protrusions 9 is greater than the gap between the two inner limiting protrusions 8. The upper sleeve 5 has second movable limiting protrusions 10 formed on both its upper and lower sides, which are located outside the lower sleeve 4. The distance between the two opposing sides of the second movable limiting protrusions 10 is greater than the distance between the two outer limiting protrusions 7. Through the cooperation of the first movable limiting protrusion 9 and the inner limiting protrusion 8, and the cooperation of the second movable limiting protrusions 10 and the outer limiting protrusions 7, the upper sleeve 5 can be locked onto the lower sleeve 4 and move relative to the lower sleeve 4 in the inward and outward directions, but will not detach from the lower sleeve 4. The rear cover plate 6 is located at the end of the lower sleeve 4 furthest from the lock cylinder assembly 2. Both sides of the rear cover plate 6 are formed with fixed limiting protrusions 11. The distance between the opposing surfaces of the two fixed limiting protrusions 11 is greater than the distance between the two inner limiting protrusions 8 and the distance between the two outer limiting protrusions 7. The two fixed limiting protrusions 11 are located between the inner limiting protrusions 8 and the outer limiting protrusions 7, and the thickness of the fixed limiting protrusions 11 is equal to the distance between the inner limiting protrusions 8 and the outer limiting protrusions 7, making the positions of the rear cover plate 6 and the lower sleeve 4 relatively fixed and unable to move relative to each other in the inward and outward directions. The sensor can be installed inside the pressure rod assembly 1 or at another position where the lock cylinder assembly 2 moves in conjunction with the pressure rod assembly 1 (not shown in the figure).

[0033] like Figure 3 As shown, the lock cylinder assembly 2 includes a lock cylinder housing 12, a bolt linkage mechanism 13, and an anti-pry mechanism 14 mounted on the lock cylinder housing 12. The lock cylinder housing 12 includes a lock cylinder base plate 15 and an upper seat 16. The upper seat 16 includes a lock cylinder top plate 17 and two lock cylinder side plates 18 that are bent and extended towards the lock cylinder base plate 15 on both sides of the lock cylinder top plate 17. The upper seat 16 is fixedly connected to the lock cylinder base plate 15 through the two lock cylinder side plates 18 (some holes are omitted in the figure, and bolts are not shown).

[0034] like Figure 4 and Figure 5As shown, the latch linkage mechanism 13 includes an actuating plate 19 and a main latch 20 rotatably connected to the two lock head side plates 18 of the upper seat 16. The main latch 20 is rotatably connected to the upper seat 16 via a first latch center bolt 29, and the actuating plate 19 is rotatably connected to the upper seat 16 via an actuating plate center bolt 55. The actuating plate 19 is located on the side near the pressure rod assembly 1 and is rotatably connected to the upper seat 16 in the middle. One end of the actuating plate 19 abuts against the end face of the upper sleeve 5 facing the lower sleeve 4, and the other end of the actuating plate 19 is fixed with an actuating sub-plate 21 facing the lock head base plate 15. The actuating sub-plate 21 includes a fitting section 22 that fits into the actuating plate 19 and an abutting section 23 that forms an acute angle with the fitting section 22. A cross switch 24 is installed on the lock head base plate 15 at a position corresponding to the actuating sub-plate 21. The cross switch 24 has a beveled abutting surface 25 formed on it that cooperates with the abutting section 23. Rotating the cross switch 24 will push the actuating sub-plate 21. A latch rivet seat 26 is installed on the side of the lock head top plate 17 facing the lock head bottom plate 15. The latch rivet seat 26 includes a limiting top plate 27 that is attached to the lock head top plate 17 and fixed by bolts, and limiting side plates 28 that bend from the upper and lower sides of the limiting top plate 27 toward the lock head bottom plate 15. The first latch center bolt 29 passes through the two limiting side plates 28. The main latch 20 includes an integrally formed locking part 30 and a hinge part 31. The first latch center bolt 29 passes through the main latch 20 from the position of the hinge part 31. The height of the hinge part 31 is equal to the distance between the two limiting side plates 28. The latch rivet seat 26 fixes the height position of the main latch 20, so that the main latch 20 can only rotate relative to the first latch center bolt 29. The height of the locking part 30 is greater than the height of the hinge part 31. A first torsion spring 32 is provided on the first bolt center bolt 29 above the bolt seat 26. One end of the first torsion spring 32 abuts against the top plate 17 of the lock head, and the other end abuts against the side of the locking part 30 opposite to the top plate 17 of the lock head. The first torsion spring 32 drives the main bolt 20 to move in the pop-out direction. When the upper sleeve 5 is pressed, the hinge part 31 is pushed by the actuating plate 19, causing the main bolt 20 to move in the retracting direction. A downwardly extending limiting rod 54 is formed on the locking part 30 of the main bolt 20 away from the hinge part 31 and near the retracting direction of the main bolt 20.

[0035] like Figure 4 As shown, the anti-pry mechanism 14 includes a safety latch 33, a safety return spring 34 for ejecting the safety latch 33, a clutch plate 35 for pressing against the main latch 20 when the safety latch 33 is in the retracted state, and a second torsion spring 36 for rotating the clutch plate 35 toward the safety latch 33. Figures 6 to 8As shown, the safety latch 33 includes a safety base plate 37 located between the main latch 20 and the lock head base plate 15, safety side plates 38 extending from both sides of the safety base plate 37 towards the upper and lower sides of the main latch 20, and a safety push plate 39 formed on the opposite side of the two safety side plates 38. The opposite side of the two safety push plates 39 fits against the inner wall of the lock head side plate 18, allowing the safety latch 33 to move only in the left and right directions. A clearance hole 40 for the clearance limit rod 54 is provided on the safety side plate 38 located below the main latch 20. The clearance hole 40 gradually increases in width from the end away from the pressure rod assembly 1 towards the end closer to the pressure rod assembly 1, and a section of inclined guide surface 41 is formed in the middle of the inner wall of the clearance hole 40 near the end of the pressure rod assembly 1. The inclined guide surface 41 is inclined from the lock head base plate 15 towards the lock head top plate 17 towards the side closer to the pressure rod assembly 1. The lower lock head side plate 18 has guide holes 42 formed in the left and right directions. Figure 3As shown in the diagram, a safety positioning bolt 43 is formed on the lower safety push plate 39, passing through the guide hole 42. One end of the safety positioning bolt 43 extending out of the guide hole 42 is connected to the safety return spring 34. A limit plate 44 is fixed to the lower side of the lower lock head side plate 18. The right end of the limit plate 44 is bent towards the main lock tongue 20, so that the maximum ejection distance of the main lock tongue 20 can be limited by the limit plate 44 in conjunction with the limit rod 54. A fixing post 45 is fixed below the limit plate 44 to connect the end of the safety return spring 34 away from the safety positioning bolt 43. The safety push plate 39, facing the lock head top plate 17, includes, from left to right, a first straight section 46, a curved section 47, an inclined section 48, and a second straight section 49. Both the curved section 47 and the inclined section 48 are inclined from left to right towards the lock head bottom plate 15. The inclination of the inclined section 48 is greater than that of the curved section 47, and the curved section 47 is a concave curve. The distance between the second straight section 49 and the lock head bottom plate 15 is greater than the distance between the axis of the limit rod 54 and the lock head bottom plate 15. One end of the clutch plate 35 is rotatably connected to the center bolt 55 of the starter plate. A torsion spring groove 50 is formed on the side of the clutch plate 35 facing the lock head top plate 17. The width of the torsion spring groove 50 is greater than the diameter of the second torsion spring 36, causing one end of the second torsion spring 36 to engage in the torsion spring groove 50, applying a force to the clutch plate 35 in the direction of the safety push plate 39, ensuring that the clutch plate 35 always abuts against the safety push plate 39. A clutch protrusion 51 is formed in the middle of the clutch plate 35 facing the safety push plate 39. A clutch groove 52 is formed on the lower side of the clutch plate 35 away from the center bolt 55 of the actuating plate. A clutch force-bearing member 53 is formed on the upper side of the clutch plate 35, which abuts against the actuating plate 19 facing the top plate 17 of the lock head. The clutch groove 52 has a clutch force-bearing surface 56 in the direction of movement of the limit rod 54. When the limit rod 54 abuts against the clutch force-bearing surface 56, the force applied to the clutch force-bearing surface 56 is directed towards the side of the center bolt 55 of the actuating plate near the bottom plate 15 of the lock head, so it cannot be unlocked by pressing the main bolt 20. When the main bolt 20 is in the pop-out state and the safety bolt 33 is in the retracted state, there is a gap between the limit rod 54 and the clutch force-bearing surface 56.

[0036] Specific usage process: like Figure 8 As shown, when the escape lock is in the locked state, the main bolt 20 extends and engages with the sealing seat 3 to lock the door, while the safety bolt 33 remains abutting against the sealing seat 3 and cannot extend. Under the force of the second torsion spring 36, the clutch plate 35 rotates the safety bolt 33 to the locked position, at which point the limiting rod 54 is located within the clutch groove 52. The limiting rod 54, through the force exerted on its contact surface with the clutch groove 52, drives the clutch plate 35 to move towards the safety push plate 39, thus preventing the escape lock from being unlocked by pressing the main bolt 20.

[0037] like Figure 9As shown, when the escape lock is opened by pressing the lever assembly 1 normally, the lever assembly 1 presses the start plate 19. When the start plate 19 rotates, it drives the clutch plate 35 to rotate away from the safety push plate 39, causing the limit rod 54 to disengage from the clutch groove 52. Therefore, the main lock tongue 20 can retract under the push of the start plate 19 without being blocked by the clutch plate 35.

[0038] like Figure 10 As shown, when the door is opened, since it is no longer restricted by the sealing seat 3, the main lock tongue 20 and the safety tongue 33 will pop out. At this time, the clutch plate 35 is pushed upward by the safety push plate 39, so that the clutch plate 35 will not reach the position of the clutch groove 52 and the limit rod 54. Therefore, in this state, the main lock tongue 20 and the safety tongue 33 can retract freely without affecting the closing of the door.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lock assembly with an anti-pry mechanism, comprising a lock housing (12), a bolt linkage mechanism (13), and an anti-pry mechanism (14), characterized in that, The lock housing (12) is used to install the lock tongue linkage mechanism (13) and the anti-pry mechanism (14); The latch linkage mechanism (13) includes a main latch (20) and a starter plate (19) that drives the latch to retract when the pressure rod assembly (1) is subjected to force; The anti-pry mechanism (14) includes a safety tongue (33), a safety reset elastic element that applies an outward force to the safety tongue (33), and a clutch plate (35) that abuts against the main lock tongue (20) when the safety tongue (33) is in a retracted state and the pressure rod assembly (1) is not pressed.

2. The lock cylinder assembly with a pick-resistant mechanism according to claim 1, wherein, The clutch plate (35) is rotatably connected to the lock housing (12). The clutch plate (35) is provided with an elastic element that applies a force to rotate it in the direction of the safety tongue (33). The safety tongue (33) includes a safety push plate (39) for abutting against the clutch plate (35). When the safety tongue (33) pops out, the safety push plate (39) drives the clutch plate (35) to rotate.

3. The lock cylinder assembly with a pick-resistant mechanism according to claim 2, wherein, The safety push plate (39) is provided with a slope on the side facing the clutch plate (35), and the slope is inclined away from the clutch plate (35) in the direction of the safety tongue (33) popping out.

4. The lock cylinder assembly with a pick-resistant mechanism according to claim 2, wherein, The safety push plate (39) is provided with a first straight section (46), a curved section (47), an inclined section (48), and a second straight section (49) in sequence on the side facing the clutch plate (35). The curved section (47) and the inclined section (48) are inclined away from the clutch plate (35) in the direction of the main locking tongue (20) popping out. The slope of the inclined section (48) is greater than the slope of the curved section (47). The curved section (47) is a concave curve. The clutch plate (35) has a clutch protrusion (51) on the side facing the safety push plate (39) in the middle.

5. A lock cylinder assembly having a pick-resistant mechanism according to claim 3 or 4, wherein, The main bolt (20) is rotatably connected to the lock head housing (12) via the first bolt center bolt (29). The starter plate (19) is rotatably connected to the lock head housing (12) via the starter plate center bolt (55). The clutch plate (35) is provided with a clutch force-bearing component (53) that abuts against the side of the starter plate (19) facing the main bolt (20). The clutch plate (35) is provided with a clutch groove (52) on the lower side of the end away from the starter plate center bolt (55). The clutch groove (52) is provided with a clutch force-bearing surface (56) in the direction of movement of the limit rod (54). When the limit rod (54) abuts against the clutch force-bearing surface (56), the direction of the force applied to the clutch force-bearing surface (56) is in the direction that drives the clutch plate (35) to rotate toward the safety push plate (39).

6. The lock cylinder assembly with anti-pick mechanism according to claim 5, wherein, When the main locking tongue (20) is in the pop-out state and the safety tongue (33) is in the retracted state, there is a gap between the limit rod (54) and the clutch force surface (56). During the rotation of the starter plate (19), it abuts against the clutch plate (35) earlier than it abuts against the main locking tongue (20).

7. The lock cylinder assembly with anti-pick mechanism according to claim 5, wherein, The safety tongue (33) includes a safety base plate (37) located between the main lock tongue (20) and the lock head base plate (15), and safety side plates (38) located on both sides of the safety base plate (37) extending towards the upper and lower sides of the main lock tongue (20). The safety push plate (39) is provided in two pieces and located on the opposite side of the safety side plate (38). The opposite side of the two safety push plates (39) abuts against the inner wall of the lock head housing (12). The safety side plate (38) is provided with a clearance hole (40) for the clearance limit rod (54).

8. The lock cylinder assembly with a pick-resistant mechanism according to claim 7, wherein, The width of the clearance hole (40) gradually decreases in the direction of the safety tongue (33) popping out, and the inner wall of the larger end of the clearance hole (40) is provided with a sloping guide surface (41), which is inclined in the direction away from the clutch plate (35) towards the direction of the safety tongue (33) popping out.

9. The lock cylinder assembly with anti-pick mechanism according to claim 7, wherein, The starting plate (19) has a starting sub-plate (21) on the side facing away from the main lock tongue (20). The starting sub-plate (21) includes a fitting section (22) that fits and connects with the starting plate (19), and an abutting section (23) that forms an acute angle with the fitting section (22). A cross switch (24) is installed on the lock head base plate (15) at a position corresponding to the starting sub-plate (21). The cross switch (24) has an oblique abutting surface (25) that cooperates with the abutting section (23).

10. An escape lock characterised in that, The lock housing (12) includes a pressure rod assembly (1), a sealing seat (3), and a lock cylinder assembly (2) as described in any one of claims 1-9. The lock cylinder housing (12) includes a lock cylinder base plate (15) and an upper seat (16). The upper seat (16) includes a lock cylinder top plate (17) and two lock cylinder side plates (18) that are bent and extended from both sides of the lock cylinder top plate (17) toward the lock cylinder base plate (15). The upper seat (16) is fixedly connected to the lock cylinder base plate (15) through the two lock cylinder side plates (18). A latch rivet seat (26) is installed on the side of the lock cylinder top plate (17) facing the lock cylinder base plate (15). The latch rivet seat (26) includes a limiting part that fits against the lock cylinder top plate (17) and is fixed by bolts. The top plate (27) and the limiting side plates (28) that bend from the upper and lower sides of the limiting top plate (27) toward the lock head bottom plate (15) are provided with a first lock tongue center bolt (29) passing through the two limiting side plates (28). The main lock tongue (20) is located between the two limiting side plates (28). The main lock tongue (20) includes an integrally formed locking part (30) and a hinge part (31). The first lock tongue center bolt (29) passes through the main lock tongue (20) from the position of the hinge part (31). The height of the hinge part (31) is equal to the distance between the two limiting side plates (28). The pressure rod assembly (1) includes a lower sleeve (4), an upper sleeve (5) and a rear cover plate (6). The lower sleeve (4) The sleeve is U-shaped. On the inner walls of both sides of the opening of the lower sleeve (4), there are outer limiting protrusions (7) and inner limiting protrusions (8). The outer limiting protrusion (7) is located on the side of the inner limiting protrusion (8) facing outwards from the lower sleeve (4), and there is a gap between the outer limiting protrusion (7) and the inner limiting protrusion (8). On the upper sleeve (5) located inside the lower sleeve (4), there are first movable limiting protrusions (9) on both the upper and lower sides. The gap between the two opposing sides of the first movable limiting protrusions (9) is greater than the gap between the two inner limiting protrusions (8). On the upper sleeve (5) located outside the lower sleeve (4), there are second movable limiting protrusions (10) on both the upper and lower sides. The distance between the opposing sides of the limiting protrusions (10) is greater than the distance between the two outer limiting protrusions (7); the rear cover plate (6) is located at the end of the lower sleeve (4) away from the lock assembly (2), and both sides of the rear cover plate (6) are formed with fixed limiting protrusions (11). The distance between the opposing sides of the two fixed limiting protrusions (11) is greater than the distance between the two inner limiting protrusions (8) and the distance between the two outer limiting protrusions (7). The two fixed limiting protrusions (11) are located between the inner limiting protrusions (8) and the outer limiting protrusions (7), and the thickness of the fixed limiting protrusions (11) is equal to the distance between the inner limiting protrusions (8) and the outer limiting protrusions (7).

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