Anti-error locking type push rod lock

Abstract

The invention discloses a mistaken locking prevention type push rod lock, relates to the field of push rod locks, and aims to solve the problems that an existing push rod lock has mistaken locking risks in a special environment, inconvenience is brought to a user, and even evacuation in a crisis environment is affected. The mistaken locking prevention type push rod lock comprises a lock shell, a spring bolt is slidably connected in the lock shell, and the spring bolt is fixedly connected with a supporting block; the supporting block is fixedly connected with an elastic push rod, an elastic lock cylinder is slidably connected into the supporting block and fixedly connected with a first lock rod, the side edge of the first lock rod is matched with a binding assembly, the front face of the elastic lock cylinder is fixedly connected with a second lock rod, the side edge of the second lock rod is matched with a first shifting assembly, and the back face of the elastic lock cylinder is fixedly connected with a third lock rod. The access control system has the advantages that a user is endowed with the autonomous control right for the locking state, and the reliability and the applicability of the access control system in an emergency exit scene are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of push rod locks, in particular to a push rod lock with anti-mislocking function. BACKGROUND

[0002] In the field of building access control safety, push rod locks (also known as escape push rod locks, panic push rod locks) are widely used in safety exits and fire passages of public places due to their ability to provide quick and barrier-free evacuation in emergency situations. The core working principle is that indoor personnel can directly drive the internal mechanical structure by pressing the horizontal push rod on the door leaf, retract all the locking tongues, and achieve instantaneous opening, thereby meeting the mandatory requirements of fire regulations for emergency evacuation.

[0003] In order to improve the convenience of daily door closing, the existing technology borrows the design of the locking tongue of a common door lock, and sets a bevel structure at the front end of the locking tongue (usually a "square tongue" or a "bolt tongue") of the push rod lock. This design allows the bevel at the front end of the locking tongue to contact and be pressed against the lock catch plate fixed on the door frame when the door leaf is closed. Under the action of the closing force, the locking tongue can automatically retract and automatically pop out into the lock catch plate after the door is completely closed, thereby achieving automatic locking. This design eliminates the need for a key or manual locking step, improving the convenience and efficiency of routine door closing operations to a certain extent, especially for places with high traffic and frequent passage.

[0004] However, this "convenient" automatic locking method based on the bevel structure has obvious defects and safety hazards in actual application scenarios, bringing new inconvenience and risks to users. The main problems are as follows in the following special but common situations: First, the risk of accidental locking in temporary outdoor scenarios: When a user only needs to leave the indoor space for a short time (for example, to throw away garbage, have a short conversation in the corridor, receive a delivery or takeout), and does not want the door to be completely locked, the existing automatic locking design will forcibly lock the door. If the user does not carry a key or there is no one inside, it will cause the embarrassing situation of being accidentally locked out. This not only brings great inconvenience to the user, but also may cause safety risks (such as cooking food inside) or high economic costs (such as hiring a locksmith to break the door).

[0005] Second, unintentional locking after evacuation or daily management: When conducting fire drills or daily cleaning and goods moving require temporary access, the design will immediately relock the door leaf once it is closed, and management personnel must frequently use a key or repeatedly open it from the inside, reducing management efficiency and contradicting the intention of temporarily keeping the passage open.

[0006] Finally, there's the conflict between perceived security and user habits: users' needs for "convenience" and "controllability" vary across different situations. While automatic locking provides convenience, it deprives users of the option to choose whether to lock the door at specific times. This uncontrollability makes users feel psychologically insecure during short outdoor activities, worrying about being accidentally locked out. Summary of the Invention

[0007] In view of the above situation and to overcome the defects of the prior art, the present invention provides a push rod lock with anti-mislocking. This design effectively solves the problem that existing push rod locks have the risk of mislocking in special environments, which causes inconvenience to users and may even affect evacuation in crisis situations.

[0008] To achieve the above objectives, the present invention provides the following technical solution: The present invention includes a lock shell, the lock shell having a rectangular hole, a lock tongue slidably connected within the rectangular hole, a support block fixedly connected to the inner side of the lock tongue, an elastic push rod fixedly connected to the support block, the elastic push rod being located on the opposite side of the lock tongue and slidably connected to the lock shell, an elastic lock cylinder slidably connected within the support block, a first lock rod fixedly connected to the elastic lock cylinder, a restraining component cooperating on the side of the first lock rod, a second lock rod fixedly connected to the front of the elastic lock cylinder, a first actuating component cooperating on the side of the second lock rod, the first actuating component and the restraining component being located on the same side, a third lock rod fixedly connected to the back of the elastic lock cylinder, a sliding groove for the second and third lock rods to slide on the support block, and a second actuating component cooperating below the third lock rod.

[0009] Preferably, the restraint assembly includes a limiting stop bar, the limiting stop bar is fixedly connected to a limiting push rod, the lock housing is provided with a lock cavity for sliding of the elastic lock core and the limiting push rod, a wedge block is fixedly connected in the lock cavity, the wedge block is located on one side of the elastic lock core, and the elastic lock core is provided with a first inclined groove that cooperates with the wedge block.

[0010] Preferably, the limiting push rod is slidably connected to a guide block, the guide block is provided with a guide groove, a first spring is fitted in the guide groove on the side of the limiting push rod, a parallel linkage group is hinged to the limiting push rod, a control handle is hinged to the parallel linkage group, and a slot for the control handle to slide is provided between the guide block and the lock housing.

[0011] Preferably, the guide block has a stepped groove on its side.

[0012] Preferably, the elastic push rod includes a guide rod, a partition is fixedly connected inside the lock housing, the partition is provided with a through hole for the guide rod to slide, a second spring is provided on the guide rod between the partition and the support block, and a baffle is fixedly connected to the end of the guide rod.

[0013] Preferably, the support block has an inner cavity for accommodating the elastic lock core, an adjusting screw is fixedly connected below the elastic lock core, a nut is fixedly connected below the adjusting screw, the support block has a countersunk hole for the adjusting screw and the nut to slide, the countersunk hole communicates with the inner cavity, and a third spring is fitted on the adjusting screw above the countersunk hole.

[0014] Preferably, the bottom of the lock housing is provided with a keyway, and a control rod is slidably connected to the keyway. The control rod is located below the countersunk hole, and a through hole that mates with the countersunk hole is provided on the control rod. A dust baffle is fixedly connected to the middle of the control rod, and an internal groove that mates with the dust baffle is provided on the lock housing. A handle is snapped onto the lower end of the control rod, and the handle is located below the lock housing.

[0015] Preferably, the latch is provided with a second oblique groove, and the latch has a stepped structure.

[0016] Preferably, the first actuating component includes a forward keyhole, which is rotatably connected to the lock housing, and a longitudinal lever is fixedly connected to the forward keyhole, which is located above the second locking lever.

[0017] Preferably, the second actuating assembly includes a back keyhole, which is rotatably connected to the lock housing, and a horizontal lever is fixedly connected to the back keyhole, which is located below the third locking rod on the side near the bolt.

[0018] Compared with the prior art, the outstanding advantages of this invention are: This invention, through the cooperation of the elastic lock cylinder, the first locking rod, and the restraint assembly, effectively avoids the risk of accidental locking, gives users autonomous control over the locked state, and improves the convenience and security of use.

[0019] This invention provides users with multiple operating interfaces and more flexible control options by setting a second and third locking rod on the elastic lock cylinder, which respectively cooperate with the first and second actuating components. This not only solves the problem in the prior art that users cannot choose whether to lock, but also improves the adaptability of the lock in different usage scenarios. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall installation structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal axial structure of the lock housing of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal forward structure of the lock housing of the present invention.

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the lock case of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of the first toggle component of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of the second toggle component of the present invention.

[0026] Figure 7 This is a schematic cross-sectional view of the support block of the present invention.

[0027] Figure 8 This is an exploded structural diagram of the dust baffle and support block of the present invention.

[0028] Figure 9 This is a schematic diagram of the parallel link assembly connection structure of the present invention.

[0029] Figure 10 This is a cross-sectional structural diagram of the guide block of the present invention.

[0030] The following are the labeling elements in the diagram: 1. Lock housing; 2. Rectangular hole; 3. Lock tongue; 4. Support block; 5. Elastic push rod; 501. Guide rod; 502. Partition plate; 503. Second spring; 504. Baffle plate; 6. Elastic lock cylinder; 7. First lock rod; 8. Restraint assembly; 801. Limiting stop rod; 802. Limiting push rod; 803. Lock cavity; 804. Wedge block; 805. First inclined groove; 9. Second lock rod; 10. First actuating assembly; 1001. Forward keyhole; 1002. Longitudinal lever; 11. Third locking lever; 12. Slide groove; 13. Second actuating assembly; 1301. Back-facing keyhole; 1302. Horizontal lever; 14. Guide block; 15. Guide groove; 16. First spring; 17. Parallel linkage assembly; 18. Control handle; 19. Stepped groove; 20. Inner cavity; 21. Adjusting screw; 22. Nut; 23. Countersunk hole; 24. Third spring; 25. Keyway; 26. Control lever; 27. Dust baffle; 28. Internal groove; 29. ​​Handle; 30. Second inclined groove. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Please see the appendix Figures 1-10This embodiment discloses a push-rod lock with anti-mislocking features, comprising a lock housing 1, a rectangular hole 2 on the lock housing 1, a latch 3 slidably connected within the rectangular hole 2, a support block 4 fixedly connected to the inner side of the latch 3, an elastic push rod 5 fixedly connected to the support block 4, the elastic push rod 5 being located on the opposite side of the latch 3 and slidably connected to the lock housing 1, an elastic lock cylinder 6 slidably connected within the support block 4, a first locking rod 7 fixedly connected to the elastic lock cylinder 6, a restraining component 8 cooperating on the side of the first locking rod 7, a second locking rod 9 fixedly connected to the front of the elastic lock cylinder 6, a first actuating component 10 cooperating on the side of the second locking rod 9, the first actuating component 10 being located on the same side as the restraining component 8, a third locking rod 11 fixedly connected to the back of the elastic lock cylinder 6, a sliding groove 12 on the support block 4 for sliding the second locking rod 9 and the third locking rod 11, and a second actuating component 13 cooperating below the third locking rod 11.

[0033] For ease of understanding, the following explains some key terms in this embodiment: The lock housing 1 is the external structure of a push-bar lock, typically made of metal, used to house and protect the internal mechanical components and provide an installation interface. The lock housing 1 is usually fixed to the door leaf, serving as a support frame for the entire lock assembly.

[0034] The rectangular hole 2 is an opening provided on the lock housing 1, the shape of which matches the cross-section of the bolt 3. The function of the rectangular hole 2 is to guide the bolt 3 to slide in a straight line, ensuring that the bolt 3 can extend or retract smoothly to achieve the locking or unlocking of the door.

[0035] The latch 3 is a component in the push-bar lock that directly engages with the strike plate on the door frame. Its extension or retraction determines the locking state of the door. The latch 3 has a certain beveled structure so that it can automatically retract when the door is closed.

[0036] The support block 4 is a component fixedly connected to the inside of the bolt 3. Its main function is to provide a stable mounting base and movement guide for the elastic push rod 5 and the elastic lock cylinder 6. The support block 4 moves together with the bolt 3 and transmits the movement of the bolt 3 to other internal mechanisms.

[0037] The elastic push rod 5 is a push rod with an elastic reset function. One end of it is fixedly connected to the support block 4, and the other end is slidably connected to the lock housing 1. When the elastic push rod 5 is pressed, it can drive the bolt 3 to retract, and after release, the bolt 3 will be reset and extended by the elastic force.

[0038] The resilient lock cylinder 6 is a component located inside the support block 4 and capable of sliding relative to the support block 4. It typically contains a spring mechanism, giving it an elastic restoring capability. This resilient lock cylinder 6, through its locking rod, cooperates with an external actuating assembly to control the movement of the bolt 3.

[0039] The first locking rod 7 is a rod-shaped component fixedly connected to the elastic lock cylinder 6, and its side engages with the restraining assembly 8. The movement of the first locking rod 7 is restricted or driven by the restraining assembly 8, thereby affecting the overall movement of the elastic lock cylinder 6.

[0040] The restraint assembly 8 is a mechanism used to restrict or drive the movement of the first locking rod 7. By cooperating with the first locking rod 7, the restraint assembly 8 can control the position of the elastic lock cylinder 6, thereby affecting the extension and retraction of the bolt 3.

[0041] The second locking lever 9 is a rod-shaped component fixedly connected to the front of the elastic lock cylinder 6 (usually facing the outside of the door or a specific operating direction), and its side cooperates with the first actuating assembly 10. The movement of the second locking lever 9 is driven by the first actuating assembly 10 to realize the longitudinal movement of the elastic lock cylinder 6, and it does not control the locking of the bolt 3.

[0042] The first actuating assembly 10 is a mechanism for driving the movement of the second locking lever 9, and is typically activated by an external operation (such as turning a key). The first actuating assembly 10 is located on the same side as the restraining assembly 8.

[0043] The third locking rod 11 is a rod-shaped component fixedly connected to the back of the resilient lock cylinder 6 (usually referring to the direction facing the inside of the door or opposite to the second locking rod 9), and its lower part cooperates with the second actuating assembly 13. The movement of the third locking rod 11 is driven by the second actuating assembly 13 to realize the locking or unlocking function of the bolt 3.

[0044] The slide groove 12 is a through channel provided on the support block 4, used to guide the second locking rod 9 and the third locking rod 11 to slide inside the support block 4, thus preventing interference during the movement of the elastic lock cylinder 6.

[0045] The second actuating assembly 13 is a mechanism for driving the movement of the third locking lever 11, and is usually activated by external operation. The second actuating assembly 13, together with the first actuating assembly 10, constitutes a mechanism for multi-directional control of the resilient lock cylinder 6.

[0046] The lock housing 1 serves as the external frame of the entire lock, used to mount and protect the internal mechanisms. The lock housing 1 can be constructed from a stamped metal sheet with pre-drilled mounting holes for securing it to the side of the door panel using screws or rivets. Typically, a rectangular hole 2 is provided on the lock housing 1, the size and shape of which match the cross-section of the bolt 3. This rectangular hole 2 can be formed on the lock housing 1 using milling or laser cutting processes, with its inner wall finely machined to provide a smooth sliding surface. The bolt 3 is slidably connected to this rectangular hole 2 via its main body. Alternatively, the bolt 3 can be directly inserted into the rectangular hole 2, achieving linear movement guided by the hole wall. To ensure smooth sliding, a low-friction coating can be applied to the contact surface between the bolt 3 and the rectangular hole 2.

[0047] A support block 4 is fixedly connected to the inner side of the latch 3. This support block 4 is a key component connecting the latch 3 to the internal control mechanism. The support block 4 can be securely attached to the inner side of the latch 3 by welding, riveting, or screwing. A spring-loaded push rod 5 is fixedly connected to the support block 4. The spring-loaded push rod 5 is located on the opposite side of the latch 3 and is slidably connected to the lock housing 1. Alternatively, one end of the spring-loaded push rod 5 can be welded to the support block 4, and the other end can pass through a circular through-hole in the lock housing 1.

[0048] Inside the support block 4, a resilient lock cylinder 6 is slidably connected. This resilient lock cylinder 6 is the component that realizes the core control function of the lock. The support block 4 can form a rectangular cavity, in which the resilient lock cylinder 6 is placed, sliding linearly guided by the cavity wall. To provide elasticity, a third spring 24 can be provided at the lower end of the resilient lock cylinder 6. One end of the third spring 24 abuts against the inner wall of the support block 4, and the other end abuts against the lower end face of the resilient lock cylinder 6.

[0049] A first locking rod 7 is fixedly connected to the elastic lock cylinder 6. A restraining assembly 8 is fitted to the side of the first locking rod 7. The first locking rod 7 can be a cylindrical rod, fixed to the side of the elastic lock cylinder 6 by threads or pins. The restraining assembly 8 contains a limiting stop 801, which is perpendicular to the first locking rod 7. Under normal circumstances, their movement interferes with each other.

[0050] A second locking rod 9 is fixedly connected to the front of the resilient lock cylinder 6. A first actuating assembly 10 is fitted to the side of the second locking rod 9. The second locking rod 9 can be a flat rod body, fixed to the front of the resilient lock cylinder 6 by welding or screws. The first actuating assembly 10 can be a simple rotating paddle, driven by an external knob, with its edge contacting the side of the second locking rod 9. When the paddle rotates, its edge can push the second locking rod 9 downward along the slide groove 12. The first actuating assembly 10 and the restraining assembly 8 are located on the same side of the lock.

[0051] A third locking rod 11 is fixedly connected to the back of the resilient lock cylinder 6. The support block 4 has a sliding groove 12 for the second locking rod 9 and the third locking rod 11 to slide. A second actuating assembly 13 is fitted below the third locking rod 11. The third locking rod 11 can be a flat rod similar to the second locking rod 9, fixed to the back of the resilient lock cylinder 6 by welding or screws. The support block 4 can have straight sliding grooves 12 that match the shapes of the second locking rod 9 and the third locking rod 11 to ensure stable guidance when the resilient lock cylinder 6 slides. The second actuating assembly 13 can be a simple push block, driven by an external push button. Rotation of the push block moves the third locking rod 11 to the left, and the third locking rod 11 opens the bolt 3 via the support block 4.

[0052] To achieve the function of preventing accidental locking, such as Figure 3 As shown, in the locked state, the limit stop 801 is located to the right of the first locking rod 7. At this time, the limit push rod 802 drives the limit stop 801 to move to the left. The limit stop 801, through the first locking rod 7, drives the elastic lock cylinder 6 and the support block 4 to move to the left. The support block 4 drives the bolt 3 to move to the left, thus completing the unlocking. During the leftward movement of the elastic lock cylinder 6, the first inclined surface of the elastic lock cylinder 6 cooperates with the wedge block 804, and the elastic lock cylinder 6 is forcibly compressed into the support block 4. The first locking rod 7 moves downward to disengage from the limit stop 801. When the limit lever 801 and the limit push rod 802 continue to move, and the limit lever 801 disengages from the first locking rod 7, the elastic push rod 5 pushes the support block 4 to reset. At this time, the limit lever 801 is located on the right side of the first locking rod 7. After the limit push rod 802 resets, the limit lever 801 is located on the left side of the first locking rod 7. The limit lever 801 limits the left side of the first locking rod 7. At this time, after the inclined surface of the lock tongue 3 contacts the door frame, the inclined surface structure will no longer be forcibly retracted and automatically pop out to lock, avoiding accidental locking.

[0053] When the user returns indoors and wishes to restore the automatic locking function, the first actuating component 10 can be operated to drive the second locking rod 9. The second locking rod 9 causes the elastic lock cylinder 6 to move downwards, and the limit push rod 802 and the limit stop rod 801 pass over the first locking rod 7 to reset. After that, the elastic lock cylinder 6 resets, and the limit stop rod 801 is located to the right of the first locking rod 7, so that the first locking rod 7 on the elastic lock cylinder 6 re-engages with the restraint component 8.

[0054] In addition, a third locking rod 11 is fixedly connected to the back of the elastic lock cylinder 6. A second actuating component 13 is fitted below the third locking rod 11. The second actuating component drives the third locking rod 11 to move to the left. The left and right sides of the third locking rod 11 are restricted by the sliding groove 12. The third locking rod 11 drives the support block 4 and the bolt 3 to move to the left. The third locking rod 11 and the second actuating component 13 can provide another way of operation, such as manual unlocking from the outside, which further enhances the user's control over the lock status.

[0055] The restraint assembly 8 is designed to constrain or guide the movement of the elastic lock cylinder 6 to ensure stable sliding along a preset path and prevent misoperation. The limit stop 801 is a key component of the restraint assembly 8; its main function is to provide a physical stop or support point to limit the range of movement of the elastic lock cylinder 6. The limit stop 801 can be designed as a fixed structure, directly integrated inside the lock housing 1; or it can be designed as an adjustable structure, with its position adjusted via threads or snap-fits to adapt to different lock cylinder travel requirements. The limit push rod 802 is fixedly connected to the limit stop 801. The limit push rod 802 can be a simple rod-shaped structure that slides to move the limit stop 801. The lock cavity 803 is a space inside the lock housing 1 specifically designed to accommodate the elastic lock cylinder 6 and the limit push rod 802, providing these components with precise sliding guides and an operating environment. The shape and size of the lock cavity 803 are typically matched to the geometry of the components it houses. For example, it can be a rectangular groove or a complex structure consisting of multiple interconnected channels to ensure smooth movement and precise alignment of the components. The wedge block 804 is a structure with an inclined surface. Its main function is to convert the linear movement of the elastic lock cylinder 6 into longitudinal displacement by cooperating with the first inclined groove 805 on the elastic lock cylinder 6, thereby disengaging the limiting stop 801 from the first locking rod 7 at a specific position. The wedge block 804 is fixed to the inner wall of the lock cavity 803, with its inclined surface facing the elastic lock cylinder 6; alternatively, it can be designed to be movable, allowing its position to be changed through external operation. The first inclined groove 805 is an inclined surface on the elastic lock cylinder 6 that cooperates with the inclined surface of the wedge block 804 to achieve the specific movement of the elastic lock cylinder 6.

[0056] The limiting push rod 802 is slidably connected to a guide block 14. A guide groove 15 is provided within the guide block 14, and a first spring 16 fits within the guide groove 15 on the side of the limiting push rod 802. A parallel connecting rod assembly 17 is hinged to the limiting push rod 802, and a control handle 18 is hinged to the parallel connecting rod assembly 17. A slot for the control handle 18 to slide is provided between the guide block 14 and the lock housing 1. Specifically, the limiting push rod 802 is a key component of the restraint assembly 8. Its main function is to cooperate with the elastic lock cylinder 6, and through its movement, to restrict or release the restraint effect on the elastic lock cylinder 6, thereby achieving the anti-locking function. The limiting push rod 802 is a square rod-shaped structure, with one end fixedly connected to the limiting stop 801, and the other end slidably connected to the guide block 14. The guide block 14 provides stable sliding support and guidance for the limiting push rod 802, ensuring the accurate movement trajectory of the limiting push rod 802 within the lock cavity 803. The guide block 14 is a block-shaped structure with an internal channel. The guide groove 15 is located inside the guide block 14 and is used to accommodate and guide the movement of the limiting push rod 802. The shape and size of the guide groove 15 match the cross-sectional shape of the limiting push rod 802 to provide precise guidance and reduce friction and wobbling during movement. The first spring 16 provides a reset force and preload to the limiting push rod 802, ensuring that the limiting push rod 802 can remain in a preset position when no external force is applied, and automatically resets after operation. The first spring 16 is a compression spring, with one end fixed to the inner wall of the guide block 14 and the other end abutting against the side of the limiting push rod 802, exerting a rightward elastic force on the limiting push rod 802. The parallel linkage group 17 is a mechanical transmission mechanism consisting of at least two linkages connected by hinge points. Its main function is to convert the translational movement of the control handle 18 into the linear movement of the limiting push rod 802 and maintain the smoothness and directionality of the movement. The slot is a structure located between the guide block 14 and the lock housing 1, used to accommodate and guide the movement of the control handle 18. The shape and size of the slot should match the movement trajectory of the control handle 18 to ensure that the control handle 18 can slide smoothly during operation and to provide a certain limiting function to prevent the control handle 18 from disengaging or being misoperated.

[0057] The guide block 14 is provided with a stepped groove 19 on its side, so that the control handle 18 or its connecting parts can be precisely matched with the stepped groove 19 during the sliding process.

[0058] The elastic push rod 5 is designed to include a guide rod 501, which slides into a through hole on a partition 502 fixedly connected inside the lock housing 1. When the elastic push rod 5 is pushed, the guide rod 501 slides precisely along a preset trajectory within the through hole. The partition 502 provides stable support and guidance for the guide rod 501, effectively preventing the elastic push rod 5 from deflecting or jamming during movement. Simultaneously, a second spring 503 is sleeved on the guide rod 501, with one end abutting against the partition 502 and the other end abutting against the support block 4. When the elastic push rod 5 is pushed, the second spring 503 is compressed, accumulating elastic potential energy; when the external force is removed, the second spring 503 releases energy, thus reliably returning the elastic push rod 5 to its initial position. This structural combination ensures smooth and precise movement of the elastic push rod 5 throughout its stroke and provides a stable and reliable restoring force, greatly improving the smoothness of the bolt 3's extension and retraction and the overall reliability of the lock.

[0059] The inner cavity 20 within the support block 4, used to accommodate the elastic lock cylinder 6, can be a precision-machined cuboid hole with a smooth inner wall to ensure smooth sliding of the elastic lock cylinder 6. The adjusting screw 21, fixedly connected below the elastic lock cylinder 6, can be an M3 or M4 fine-threaded rod, screwed into the threaded hole at the bottom of the elastic lock cylinder 6, and secured with thread-locking adhesive to prevent loosening. The nut 22, fixedly connected below the adjusting screw 21, can be a standard hexagonal nut with an outer diameter slightly smaller than the larger diameter of the countersunk hole 23 to facilitate tool operation. The countersunk hole 23 on the support block 4 can be formed using a two-stage drilling process, with a larger upper diameter to accommodate the nut 22 and a smaller lower diameter to guide the adjusting screw 21. The connection between the countersunk hole 23 and the inner cavity 20 can be achieved by direct drilling. The third spring 24, which fits onto the adjusting screw 21 above the countersunk hole 23, can be a stainless steel compression coil spring. Its spring constant can be selected according to the required elastic force range. One end abuts against the bottom of the elastic lock cylinder 6, and the other end abuts against the shoulder of the countersunk hole 23. By cooperating with the adjusting screw 21, nut 22, and third spring 24, users or maintenance personnel can conveniently and quickly adjust the elastic force of the elastic lock cylinder 6 according to actual needs.

[0060] The keyway 25 at the bottom of the lock housing 1 provides a precise sliding guide for the control lever 26. The control lever 26 is connected to the outside via a handle 29, which the user can operate to move the control lever 26. When it is necessary to adjust the elastic force of the elastic lock cylinder 6, the user can push or pull the handle 29 to align the through hole on the control lever 26 with the countersunk hole 23 on the support block 4. At this time, the adjustment tool can operate the adjusting screw 21 and nut 22 below the elastic lock cylinder 6 through the through hole and the countersunk hole 23, thereby changing the preload of the third spring 24 and adjusting the elastic force of the elastic lock cylinder 6. After adjustment, the user can move the control lever 26 to another position. At this time, the dust baffle 27 fixedly connected in the middle of the control lever 26 will slide above the countersunk hole 23 and fit tightly with the corresponding internal groove 28 on the lock housing 1 to form an effective seal, thereby preventing external dust, dirt and other impurities from entering the lock body and protecting the cleanliness and normal operation of the adjustment mechanism. This design cleverly integrates adjustment and dustproof functions, ensuring the reliability and service life of the adjustment mechanism while improving the ease of operation for users.

[0061] The latch 3 can be designed as a stepped structure with two steps. For example, the head of the latch 3 can be a narrower step for initial insertion of the latch, while its body is a wider step for final, secure locking. A second inclined groove 30 extending along the length of the latch 3 can be provided on its side or top. The inclination angle of this groove can be designed to be approximately 15 to 30 degrees, so that it engages with the guide ribs inside the lock housing 1 or the inclined surface of the latch when the latch 3 extends or retracts, thereby achieving smooth sliding and precise positioning. For example, when the latch 3 extends, the second inclined groove 30 can guide the head of the latch 3 to accurately enter the opening of the latch, avoiding jamming caused by misalignment.

[0062] like Figure 5 As shown, when an external operation (such as inserting and turning a key) is applied to the forward keyhole 1001, the forward keyhole 1001 is rotatably connected within the lock housing 1. Since the longitudinal lever 1002 is fixedly connected to the forward keyhole 1001, the rotation of the forward keyhole 1001 directly drives the longitudinal lever 1002 to move accordingly. Given that the longitudinal lever 1002 is located above the second locking rod 9, its movement trajectory is designed to achieve effective mechanical contact with the second locking rod 9. Specifically, the rotation of the forward keyhole 1001 causes the longitudinal lever 1002 to push the second locking rod 9 downward. The pushing of the second locking rod 9 then drives the elastic lock cylinder 6 to slide in the groove 12 within the support block 4, thereby changing the position of the first locking rod 7 and the limit stop 801. This structure ensures that external operations can be accurately and effectively transmitted to the elastic lock cylinder 6, avoiding unlocking failures or jamming caused by unclear transmission paths or loose mechanisms, thus improving the reliability and smoothness of operation of the lock.

[0063] like Figure 6 As shown, the second actuating assembly 13 plays a crucial role when unlocking from the back of the lock is required. Specifically, the back-facing keyhole 1301 is rotatably connected to the lock housing 1, serving as the input for external operation. When an external operation (e.g., turning the key) causes the back-facing keyhole 1301 to rotate, the horizontal lever 1302, fixedly connected to the back-facing keyhole 1301, also rotates accordingly. Since the horizontal lever 1302 is precisely positioned below the third locking rod 11 and close to the bolt 3, its rotational movement directly acts on the third locking rod 11. This force drives the third locking rod 11 to tend to move laterally. The lateral movement of the second locking rod 9 causes the support block 4 and the elastic lock cylinder 6 to move laterally. The movement of the elastic lock cylinder 6 changes the connection state of the bolt 3, thereby retracting the bolt 3 and completing the unlocking action. Through this structural design, the second actuating assembly 13 provides a reliable and convenient unlocking mechanism for push-bar locks from the back, ensuring the operational flexibility and security of the lock in different usage scenarios.

[0064] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A push bar lock with a mislock prevention function, characterized by: The utility model provides a lock, including lock shell (1), be equipped with rectangular hole (2) on lock shell (1), the rectangular hole (2) inside slide connection has lock tongue (3), the inside fixed connection of lock tongue (3) has support block (4), support block (4) fixed connection has elastic push rod (5), elastic push rod (5) is located the opposite side of lock tongue (3), elastic push rod (5) with lock shell (1) slide connection, the slide connection of support block (4) has elastic lock core (6), the fixed connection of elastic lock core (6) has first lock bar (7), the side edge cooperation of first lock bar (7) has restraint subassembly (8), the fixed connection of elastic lock core (6) has second lock bar (9) on the front, the side edge cooperation of second lock bar (9) has first dialing subassembly (10), first dialing subassembly (10) with restraint subassembly (8) are located the same side, the fixed connection of elastic lock core (6) has third lock bar (11) on the back, the slide of second lock bar (9) and third lock bar (11) is equipped with slide groove (12) on support block (4), the below cooperation of third lock bar (11) has second dialing subassembly (13).

2. A push bar lock according to claim 1, wherein: The restraint subassembly (8) includes a limiting rod (801), the limiting rod (801) is fixedly connected with a limiting push rod (802), the lock shell (1) is provided with a lock cavity (803) for sliding the elastic lock core (6) and the limiting push rod (802), the lock cavity (803) is fixedly connected with a wedge block (804), the wedge block (804) is located on one side of the elastic lock core (6), and the elastic lock core (6) is provided with a first inclined groove (805) matched with the wedge block (804).

3. A push bar lock of the type described in claim 2 wherein: The limiting push rod (802) is slidably connected with a guide block (14), the guide block (14) is provided with a guide groove (15), the guide groove (15) on the side of the limiting push rod (802) is matched with a first spring (16), the limiting push rod (802) is hingedly connected with a parallel link set (17), the parallel link set (17) is hingedly connected with a control handle (18), and the guide block (14) and the lock shell (1) are provided with a clamping groove for sliding the control handle (18).

4. A push bar lock of the type defined in claim 3 wherein: The guide block (14) is provided with a stepped groove (19) on the side.

5. A push bar lock according to claim 1, wherein: The elastic push rod (5) includes a guide rod (501), the lock shell (1) is fixedly connected with a partition plate (502), the partition plate (502) is provided with a through hole for sliding the guide rod (501), the guide rod (501) between the partition plate (502) and the support block (4) is provided with a second spring (503), and the end of the guide rod (501) is fixedly connected with a baffle (504).

6. A push bar lock of the type described in claim 1 wherein: The support block (4) is internally provided with an inner cavity (20) containing an elastic lock core (6), the lower end of the elastic lock core (6) is fixedly connected with an adjusting screw (21), the lower end of the adjusting screw (21) is fixedly connected with a nut (22), the support block (4) is provided with a countersunk hole (23) for sliding of the adjusting screw (21) and the nut, the countersunk hole (23) is communicated with the inner cavity (20), and the adjusting screw (21) above the countersunk hole (23) is matched with a third spring (24).

7. A push bar lock of the type described in claim 6 wherein: The bottom of the lock shell (1) is provided with a key groove (25), the key groove (25) is slidably connected with a control rod (26), the control rod (26) is located below the countersunk hole (23), the control rod (26) is provided with a through hole matched with the countersunk hole (23), the middle of the control rod (26) is fixedly connected with a dust shield (27), the lock shell (1) is provided with an embedded groove (28) matched with the dust shield (27), and the lower end of the control rod (26) is clamped with a handle (29), and the handle (29) is located below the lock shell (1).

8. A push bar lock according to claim 1, wherein: The lock tongue (3) is provided with a second inclined groove (30), and the lock tongue (3) is a stepped structure.

9. A push bar lock according to claim 1, wherein: The first dialing assembly comprises a forward lock eye (1001), the forward lock eye (1001) is rotationally connected with the lock shell (1), the forward lock eye (1001) is fixedly connected with a longitudinal dialing rod (1002), and the longitudinal dialing rod (1002) is located above the second lock rod (9).

10. A push bar lock according to claim 1, wherein: The second dialing assembly comprises a backward lock eye (1301), the backward lock eye (1301) is rotationally connected with the lock shell (1), the backward lock eye (1301) is fixedly connected with a transverse dialing rod (1302), and the transverse dialing rod (1302) is located below the third lock rod (11) and close to one side of the lock tongue (3).

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