Self-locking push rod lock and using method thereof

Abstract

The invention relates to the technical field of door locks, and discloses a self-locking push rod lock and a using method thereof.The self-locking push rod lock comprises a push rod, two supports and a locking seat, the two supports are arranged at the ends of the push rod respectively, the locking seat and the supports are distributed correspondingly, and a spring bolt is arranged on the side wall of the locking seat on one side; a driving block in transmission connection with the spring bolt is rotationally arranged on the other side of the locking seat, a screw is fixed to the end of the push rod, a transmission block is slidably arranged on the side wall of the support, the screw penetrates through the support and is in threaded connection with the transmission block, and a butt joint groove with an opening matched with the transmission block is formed in the end of the driving block. The anti-theft lock has the beneficial effects that the transmission block is driven to linearly move in the mode that the push rod drives the screw rod to rotate, the transmission block can be engaged with the butt joint groove of the driving block after moving by a certain stroke, then the lock tongue is driven to act, it is ensured that unlocking can be achieved only through continuous rotating operation, and the situation that the lock tongue is mistakenly unlocked due to accidental touch of the push rod is prevented; and the safety and the operation reliability of the lock are improved.

Description

Technical Field

[0001] This invention relates to the field of door lock technology, specifically to a self-locking push rod lock and its usage method. Background Technology

[0002] A push-bar lock is a common type of lock found in fire doors, passageway doors, and other similar locations. It uses a horizontal push bar to control the extension and retraction of the bolt, enabling rapid opening and closing.

[0003] Structurally, a typical push-rod lock usually includes a push rod, a locking seat fixed to the door frame, and a support connected to the door body. The rotation or translation of the push rod directly drives the bolt through the transmission mechanism.

[0004] However, in conventional designs, the push rod is directly connected to the latch drive component via a hinge or socket, which can easily cause accidental contact or vibration to trigger malfunctions of the latch, resulting in low safety and reliability.

[0005] To address the security and functional requirements of push-rod locks, existing technologies have made further improvements, such as the fire door top and bottom lock described in Chinese Patent Publication No. CN115874874B. In this solution, the secondary lock body uses a push-rod structure to control the upper and lower latches, and is equipped with a latch section with an automatic reset function and a roller-pressing reset structure, which enhances the lock's emergency reset capability and the privacy of external key control.

[0006] However, in this type of solution, the push rod and the pin are directly linked through a pull plate or push plate, and the linear movement of the push rod still directly acts on the pin, failing to solve the fundamental problem that the push rod mis-movement directly leads to the lock point being opened incorrectly.

[0007] Especially in situations with high security requirements, the existing push-rod locks lack an isolation mechanism for accidental operation. That is, there is no separation design between the push-rod action and the lock tongue action, which results in the lock action and the push-rod action being completely synchronized. The anti-accidental operation performance is limited, and the safety and reliability need to be improved. Summary of the Invention

[0008] The purpose of this invention is to provide a self-locking push rod lock and its usage method to solve the above problems. The transmission block can only engage with the mating groove of the drive block after moving a certain distance, thereby driving the lock tongue to move. This ensures that the lock can only be unlocked through continuous rotation, preventing accidental unlocking of the lock tongue due to accidental contact with the push rod, and improving the safety and operational reliability of the lock. See the following description for details.

[0009] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a self-locking push rod lock, comprising a push rod, a support, and a locking seat. There are two supports, which are respectively disposed at the end of the push rod. The locking seats are distributed correspondingly to the supports, and a locking tongue is provided on one side wall of the locking seat. The other side of the locking seat is rotatably provided with a drive block that is connected to the locking tongue. The end of the push rod is fixed with a screw, and the side wall of the support is slidably provided with a transmission block. The screw passes through the support and is threadedly connected to the transmission block. The end of the drive block is provided with an opening that matches the transmission block.

[0010] Preferably, the push rod end is fixed with a connecting shaft, the connecting shaft is provided with a mounting plate in the middle, and the end of the connecting shaft is fixedly connected to the screw rod. The support side wall is provided with a mounting groove, and the mounting groove is provided with a through groove to accommodate the screw rod.

[0011] Preferably, the side wall of the support accommodates an arc plate through a mounting groove, the side wall of the mounting plate is fixed with a card seat, the end of the arc plate is rotatably disposed in the middle of the card seat, and the side wall of the mounting groove is fixed with a card block, the top of the card block is provided with a card tooth, and the bottom of the arc plate is provided with a locking tooth that matches the card tooth.

[0012] Preferably, a spring with an end-connected mounting plate is fixed to the inner side of the arc plate.

[0013] Preferably, the side wall of the mounting groove is provided with a clearance groove that passes through the card seat, and a push block is fixed on the top of the arc plate, with the top of the push block located in the clearance groove.

[0014] Preferably, the outer wall of the push block is provided with anti-slip texture, and the top of the push block is provided with a slot that matches the top side wall of the clearance groove.

[0015] Preferably, a reset cover is fixed to the side wall of the support, the connecting shaft passes through the reset cover, and a spring is provided inside the reset cover. One end of the spring is fixed to the inner wall of the reset cover, and the other end is fixed to the connecting shaft. The rotation of the connecting shaft can compress the spring. A guide cylinder sleeved outside the connecting shaft is fixed to the side wall of the reset cover.

[0016] Preferably, both ends of the push rod are bent sections, and the middle section of the push rod is fitted with multiple protective sleeves.

[0017] Preferably, a first fixing plate is fixed to the mounting surface of the support, and a second fixing plate is fixed to the mounting surface of the locking seat.

[0018] The present invention also provides a method for using the aforementioned self-locking push rod lock, comprising the following steps: a. Unlocking process: Rotate the push rod to drive the screw at the end of the push rod to rotate. The rotation of the screw drives the transmission block, which is threaded to it, to move linearly along the side wall of the support. The linear movement of the transmission block causes its end to enter and abut against the inner wall of the docking groove of the drive block on the locking seat, and the other end of the transmission block separates from the locking block. At this time, continue to rotate the push rod so that the screw pushes the drive block to rotate through the abutment between the transmission block and the inner wall of the docking groove, thereby driving the lock tongue, which is connected to the drive block, to retract and complete the unlocking. b. Locking process: During the rotation of the push rod, the arc plate connected to the mounting plate rotates around the card seat. The rotation of the arc plate causes it to enter the mounting groove on the side wall of the support. The spring installed on the mounting plate pushes the arc plate to move continuously towards the card block in the mounting groove. When the locking tongue is unlocked, the continuous pushing of the spring causes the locking teeth of the arc plate to mesh with the locking teeth of the card block, thereby fixing the arc plate and completing the locking. c. Reset procedure: In the locking process, the rotation of the push rod causes the spring in the reset cover to bend and store energy through the connecting shaft, pressing the push block located on the top of the arc plate into the mounting groove. This causes the push block to move inward along the clearance groove on the side wall of the mounting groove. The inward movement of the push block drives the arc plate to rotate, thereby disengaging the locking teeth of the arc plate from the locking teeth of the locking block. The anti-slip texture on the outer wall of the push block pushes the push block upward, releasing the restriction on the arc plate. At the same time, the bent spring in the reset cover releases the stored energy, driving the connecting shaft to rotate in the opposite direction. The reverse rotation of the connecting shaft drives the screw to rotate in the opposite direction, causing the locking tongue to extend until the locking tongue extends to the limit where the transmission block can no longer rotate, causing the screw to drive the transmission block to move. The transmission block exits from the docking groove of the drive block and moves in the opposite direction along the side wall of the support to reset. The reverse rotation of the connecting shaft simultaneously drives the arc plate and the push block to reset until the locking groove on the top of the push block abuts against the top side wall of the clearance groove, completing the reset.

[0019] The beneficial effects are as follows: 1. The present invention drives the transmission block to move linearly by rotating the screw through the push rod, so that the transmission block can engage with the mating groove of the drive block after moving a certain distance, thereby driving the locking tongue to move. This ensures that the lock can only be unlocked through continuous rotation, preventing the locking tongue from being accidentally opened due to accidental contact with the push rod, thus improving the safety and operational reliability of the lock.

[0020] 2. After the push rod rotates to unlock, the arc plate automatically pushes the lock teeth to engage with the locking teeth of the locking block under the action of the spring, realizing self-locking. This can fix the position of the push rod and prevent the lock tongue from accidentally resetting due to external force or vibration in an emergency, thus meeting the need to keep the door lock in a stable open state in specific scenarios.

[0021] 3. During reset, simply press the push block to disengage the lock teeth. At the same time, the energy-storing spring drives the connecting shaft to rotate automatically in the opposite direction, thereby resetting the lock tongue and retracting the transmission block. This simplifies the recovery steps after unlocking, eliminates the need for manual reset of the push rod, and makes the operation simple, quick, and convenient, thus improving the ease of door lock operation.

[0022] 4. The spring inside the reset cover stores energy as the connecting shaft rotates during the unlocking process, providing direct power for the reset, making the reset action fast and reliable. The guide cylinder can stabilize the rotation trajectory of the connecting shaft, prevent swaying during reset, and further improve the stability of the reset mechanism.

[0023] 5. The support is installed on the door body through the first fixing plate, and the locking seat is installed on the door frame through the second fixing plate. The two are installed independently. The overall structure is modular and the assembly relationship is clear, which facilitates on-site installation, debugging and later maintenance and replacement. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the support and locking seat of the present invention; Figure 3 This is the present invention. Figure 2 A magnified structural diagram at point A; Figure 4 This is a structural breakdown diagram of the present invention; Figure 5 This is the present invention. Figure 4 A magnified structural diagram at point B; Figure 6 This is a three-dimensional structural schematic diagram of the present invention from another angle; Figure 7 This is the present invention. Figure 6 A magnified structural diagram at point C; Figure 8 This is a structurally disassembled schematic diagram of the support and locking seat of the present invention; Figure 9 This is the present invention. Figure 8 A magnified structural diagram at point D; Figure 10 This is a three-dimensional structural schematic diagram of the locking seat of the present invention; Figure 11This is a structural disassembly diagram of the locking seat of the present invention; Figure 12 This is a three-dimensional structural schematic diagram of the reset cover of the present invention; Figure 13 This is a structural breakdown diagram of the reset cover of the present invention.

[0026] The annotations in the attached figures are explained as follows: 1. Push rod; 101. Mounting plate; 102. Card holder; 103. Screw; 104. Sheath; 105. Bent section; 106. Connecting shaft; 2. Support; 201. Mounting groove; 202. Through groove; 203. Locking block; 204. Locking tooth; 205. Clearance groove; 206. First fixing plate; 3. Locking seat; 301. Drive block; 302. Connecting groove; 303. Second fixing plate; 4. Arc plate; 401. Locking tooth; 402. Push block; 402a. Anti-slip texture; 403. Spring; 404. Card slot; 5. Reset cover; 501. Spring piece; 502. Guide cylinder; 6. Transmission block; 7. Locking tongue. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0028] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0029] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] See Figures 1-13 As shown, the present invention provides a self-locking push rod lock, including a push rod 1, a support 2, and a locking seat 3. There are two supports 2, which are respectively located at the ends of the push rod 1. A screw 103 is fixed to the end of the push rod 1 (see details). Figures 5-9 When push rod 1 is rotated, screw 103 rotates synchronously with push rod 1, and transmission block 6 is slidably provided on the side wall of support 2 (see details). Figure 9 The screw 103 passes through the support 2 and is threadedly connected to the threaded hole of the transmission block 6. When the screw 103 rotates, it drives the transmission block 6, which is threadedly connected to it, to move linearly along the side wall of the support 2. The locking seat 3 is distributed correspondingly to the support 2. One side wall of the locking seat 3 is provided with a locking tongue 7. The other side of the locking seat 3 is provided with a drive block 301 via a bearing. The drive block 301 is connected to the locking tongue 7. The end of the drive block 301 near the support 2 is provided with a mating groove 302 (see details). Figures 10-11 When the transmission block 6 moves linearly toward the drive block 301, its end enters and abuts the inner wall of the docking groove 302 of the drive block 301. After the transmission block 6 abuts the inner wall of the docking groove 302, it continues to move and pushes the drive block 301 to rotate around its axis. When the drive block 301 rotates, it drives the locking tongue 7, which is connected to it in transmission, to retract into the locking seat 3.

[0033] As an optional implementation, a connecting shaft 106 is fixed to the end of the push rod 1. The end of the connecting shaft 106 is fixedly connected to the screw rod 103 by threads or key pins. When the push rod 1 is rotated, the connecting shaft 106 rotates synchronously with the push rod 1. A mounting plate 101 is fixed in the middle of the connecting shaft 106. When the connecting shaft 106 rotates, it drives the mounting plate 101 to rotate synchronously. A mounting groove 201 is provided on the side wall of the support 2. A through groove 202 is provided in the middle of the mounting groove 201 for the screw rod 103 to pass through and rotate with it (see details). Figure 5 Mounting plate 101 is located in mounting groove 201. A retainer 102 is bolted to the side wall of mounting plate 101. Arc plate 4 is accommodated in mounting groove 201 on the side wall of support 2 (see details). Figures 5-9 One end of the arc plate 4 is rotatably mounted in the middle of the mounting base 102 via a pivot or pin, while the other end of the arc plate 4 is a free end. Thus, when the mounting plate 101 rotates, the mounting base 102 drives the arc plate 4 to rotate around its pivot center. A locking block 203 is fixed to the inner wall of the mounting groove 201 (see details). Figure 5 The top of the locking block 203 has locking teeth 204 protruding towards the arc plate 4. The bottom of the arc plate 4 has locking teeth 401 that cooperate with the locking teeth 204. When the arc plate 4 rotates towards the locking block 203, the locking teeth 401 at its bottom move closer to the locking teeth 204 of the locking block 203 until they can be engaged and locked. A spring 403 is fixed inside the arc plate 4 (see details). Figure 9 The other end of the spring 403 is fixed to the mounting plate 101. Its installation direction is either in a compressed state or in a direction that pushes the arc plate 4 towards the locking block 203. When the arc plate 4 swings towards the locking block 203 due to the rotation of the mounting plate 101, the spring 403 is compressed and accumulates elastic force, continuously pushing the arc plate 4, so that the locking tooth 401 maintains the tendency to press against the locking tooth 204. The side wall of the mounting groove 201 is also provided with a relief groove 205 for the free end of the arc plate 4 to extend. A push block 402 is installed at the free end of the arc plate 4. The push block 402 passes through the relief groove 205, and its exposed part is easy to operate. Therefore, the rotation of the arc plate 4 will drive the push block 402 to move along the relief groove 205. The outer wall of the push block 402 is machined with anti-slip texture 402a (see details). Figure 3 To facilitate the application of force during reset, the push block 402 has a reset guide groove 404 on its top. After the arc plate 4 is reset, the groove 404 on the top of the push block 402 abuts against the top wall of the relief groove 205 to ensure that the push block 402 and the arc plate 4 return to their original positions and avoid misalignment or shaking. When push rod 1 rotates to unlock or lock, mounting plate 101 rotates with connecting shaft 106, causing arc plate 4 to rotate near its pivot center. Locking tooth 401 moves to abut against locking tooth 204 of locking block 203. Under the continuous push of spring 403, locking tooth 401 engages with locking tooth 204, achieving automatic locking of the arc plate 4 and push rod 1, preventing accidental reset of the lock tongue or unlocking failure due to external forces such as vibration or impact. When reset is required, the anti-slip texture 402a of push block 402 presses and pushes push block 402, causing push block 402 to move along relief groove 205, thereby driving arc plate 4 to rotate. Locking tooth 401 disengages from locking tooth 204, allowing mounting plate 101, arc plate 4 and push block 402 to return to their original positions in sequence. At this time, the locking groove 404 at the top of push block 402 abuts against the top wall of relief groove 205, completing the reset and locking.

[0034] A reset cover 5 is fixed to the side wall of support 2 (see details). Figures 12-13 The connecting shaft 106 passes through the reset cover 5, and the reset cover 5 is equipped with a spring piece 501 (see details). Figure 13 One end of the spring 501 is fixed to the inner wall of the reset cover 5, and the other end is fixed to the connecting shaft 106. When the connecting shaft 106 rotates, the spring 501 bends to store energy and provides a reset force. A guide cylinder 502 is fixed to the side wall of the reset cover 5. The guide cylinder 502 is sleeved on the outside of the connecting shaft 106. The connecting shaft 106 rotates inside the guide cylinder 502 and is guided by it. Both ends of the push rod 1 are bent sections 105. The push rod 1 is connected to the connecting shaft 106 on both sides through the bent sections 105 at both ends. The screw 103 pushes the push rod 1 so that the push rod 1 can rotate around the connecting shaft 106 without rotating the push rod 1. The middle section of the push rod 1 is fitted with multiple protective sleeves 104 to facilitate the rotation of the push rod 1. The mounting surface of the support 2 is fixed with a first fixing plate 206, which is used to install the support 2 on the door body. The mounting surface of the locking seat 3 is fixed with a second fixing plate 303, which is used to install the locking seat 3 on the door frame so that the support 2 and the locking seat 3 fit together. When unlocking is required, push the sleeve 104 on push rod 1. Push rod 1 drives the connecting shaft 106 to rotate via its bent sections 105 at both ends. The rotation of the connecting shaft 106 synchronously drives the screw 103 to rotate. At this time, the mounting plate 101 fixed on the connecting shaft 106 moves accordingly, compressing the spring 403 inside the arc plate 4. The spring 501 inside the reset cover 5 bends due to the rotation of the connecting shaft 106. Simultaneously, driven by the rotation of the mounting plate 101, the locking teeth 401 of the arc plate 4 engage with the locking teeth 204 of the locking block 203, locking the position of push rod 1. When it is necessary to restore the lock, push rod 1 can be unlocked by pushing the sleeve 104 on the push rod 1. Pressing the push block 402 causes the arc plate 4 to rotate, disengaging its locking teeth 401 from the locking block 203. The arc plate 4 releases its lock on the push rod 1. At this time, the energy-storing spring 501 inside the reset cover 5 drives the connecting shaft 106 to rotate in the opposite direction, causing the screw 103 to reverse. The screw 103, through threaded transmission, drives the transmission block 6 to move in the opposite direction along the side wall of the support 2. The transmission block 6 exits from the mating groove 302 of the drive block 301, releasing its constraint on the drive block 301. The drive block 301 then rotates in the opposite direction under the action of the torsion spring of the internal locking tongue 7, causing the locking tongue 7 to extend to the outside of the locking seat 3, thus locking the door. Simultaneously, at the end of the reset process, the locking groove 404 at the top of the push block 402 abuts against the top side wall of the clearance groove 205.

[0035] The present invention also provides a method for using a self-locking push rod lock, comprising the following steps: a. Unlocking process: Rotate push rod 1 to drive screw 103 at the end of push rod 1 to rotate. The rotation of screw 103 drives transmission block 6, which is threaded to it, to move linearly along the side wall of support 2. The linear movement of transmission block 6 causes its end to enter and abut against the inner wall of the docking groove 302 of drive block 301 on locking seat 3, and the other end of transmission block 6 separates from the locking block 203. At this time, continue to rotate push rod 1 so that screw 103 pushes drive block 301 to rotate through the abutment of transmission block 6 against the inner wall of docking groove 302, thereby driving the lock tongue 7, which is connected to drive block 301, to retract and complete the unlocking. b. Locking process: During the rotation of push rod 1, arc plate 4 connected to mounting plate 101 rotates around the card seat 102. The rotation of arc plate 4 causes it to enter the mounting groove 201 on the side wall of support 2. Spring 403 installed on mounting plate 101 pushes arc plate 4 to move continuously toward the card block 203 in mounting groove 201. When the locking tongue 7 unlocks, the continuous pushing of spring 403 causes the locking teeth 401 of arc plate 4 to mesh with the locking teeth 204 of card block 203, thereby fixing arc plate 4 and completing the locking. c. Reset procedure: During the locking process, the rotation of push rod 1 causes the spring piece 501 inside the reset cover 5 to bend and store energy via connecting shaft 106. This energy presses the push block 402 located at the top of the arc plate 4 into the mounting groove 201, causing the push block 402 to move inward along the clearance groove 205 on the side wall of the mounting groove 201. The inward movement of the push block 402 drives the arc plate 4 to rotate, thereby disengaging the locking teeth 401 of the arc plate 4 from the locking teeth 204 of the locking block 203. The anti-slip texture 402a on the outer wall of the push block 402 pushes the push block 402 upward, releasing the restriction on the arc plate 4. At the same time, the bent spring piece 501 inside the reset cover 5... The spring 501 releases stored energy, driving the connecting shaft 106 to rotate in the opposite direction. The reverse rotation of the connecting shaft 106 drives the screw 103 to rotate in the opposite direction, causing the locking tongue 7 to extend until the locking tongue 7 extends to the limit transmission block 6 and cannot move. At this time, the rotation of the screw 103 will drive the transmission block 6 to rotate. The transmission block 6 will exit from the docking groove 302 of the driving block 301 and move in the opposite direction along the side wall of the support 2 to reset. The reverse rotation of the connecting shaft 106 will simultaneously drive the arc plate 4 and the push block 402 to reset until the slot 404 at the top of the push block 402 abuts against the top side wall of the clearance groove 205, and the reset is completed. The transmission block 6 is driven to move linearly by the screw 103 rotating through the push rod 1. The transmission block 6 can only engage with the docking groove 302 of the drive block 301 after moving a certain distance, thereby driving the lock tongue 7 to move. This ensures that the lock can only be unlocked through continuous rotation, preventing the lock tongue 7 from being accidentally opened due to accidental contact with the push rod 1, thus improving the safety and operational reliability of the lock. After the push rod 1 rotates to unlock, the arc plate 4 automatically pushes the lock tooth 401 to engage with the lock tooth 204 of the locking block 203 under the action of the spring 403, so as to achieve self-locking. This can fix the position of the push rod 1 and prevent the lock tongue 7 from being accidentally reset due to external force or vibration in an emergency, thus meeting the need to keep the door lock in a stable open state in a specific scenario. During reset, simply pressing the push block 402 will disengage the lock tooth 401 from the locking tooth 204. At the same time, the energy-storing spring 501 will drive the connecting shaft 106 to rotate automatically in the opposite direction, thereby resetting the lock tongue 7 and retracting the transmission block 6. This simplifies the recovery steps after unlocking, eliminates the need for manual reset of the push rod 1, and makes the operation simple and quick, improving the convenience of door lock operation. The spring 501 inside the reset cover 5 stores energy as the connecting shaft 106 rotates during the unlocking process, providing direct power for the reset, making the reset action fast and reliable. The guide cylinder 502 can stabilize the rotation trajectory of the connecting shaft 106, prevent swaying during reset, and further improve the stability of the reset mechanism. The support 2 is installed on the door body through the first fixing plate 206, and the locking seat 3 is installed on the door frame through the second fixing plate 303. The two are installed independently. The overall structure is modular and the assembly relationship is clear, which facilitates on-site installation, debugging and later maintenance and replacement.

[0036] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A self-latching push rod lock characterized by: Including push rod (1), support (2) and locking seat (3), the support (2) is two, two supports (2) are respectively arranged in the end of push rod (1), the locking seat (3) is distributed with the support (2) correspondingly, one side locking seat (3) side wall is equipped with lock tongue (7); The locking seat (3) is rotatably provided with a driving block (301) on the other side and is in transmission connection with the lock tongue (7), the end of the push rod (1) is fixedly provided with a screw rod (103), and the side wall of the support (2) is slidably provided with a transmission block (6), the screw rod (103) penetrates the support (2) and is in threaded connection with the transmission block (6), and the end of the driving block (301) is provided with an opening and an abutting groove (302) matched with the transmission block (6).

2. A self-latching push rod lock according to claim 1, wherein: The end of the push rod (1) is fixedly provided with a connecting shaft (106), the middle part of the connecting shaft (106) is provided with a mounting plate (101), and the end of the connecting shaft (106) is fixedly connected to the screw rod (103), the side wall of the support (2) is provided with a mounting groove (201), and the middle part of the mounting groove (201) is provided with a through groove (202) for accommodating the screw rod (103).

3. A self-latching push rod lock according to claim 2, wherein: The side wall of the support (2) is accommodated with an arc plate (4) through the mounting groove (201), the side wall of the mounting plate (101) is fixedly provided with a clamping seat (102), the end of the arc plate (4) is rotatably arranged in the middle part of the clamping seat (102), and the side wall of the mounting groove (201) is fixedly provided with a clamping block (203), the top of the clamping block (203) is provided with a clamping tooth (204), and the bottom of the arc plate (4) is provided with a locking tooth (401) matched with the clamping tooth (204).

4. The self-latching pushrod lock of claim 3, wherein: The inner side of the arc plate (4) is fixedly provided with a spring (403) with one end connected to the mounting plate (101).

5. The self-latching pushrod lock of claim 3, wherein: The side wall of the mounting groove (201) is provided with an avoiding groove (205) penetrating the clamping seat (102), the top of the arc plate (4) is fixedly provided with a push block (402), and the top of the push block (402) is located in the avoiding groove (205).

6. A self-latching pushrod lock according to claim 5, wherein: The outer wall of the push block (402) is provided with an anti-skid pattern (402a), and the top of the push block (402) is provided with a clamping groove (404) matched with the top side wall of the avoiding groove (205).

7. The self-latching pushrod lock of claim 2, wherein: The side wall of the support (2) is fixedly provided with a reset cover (5), the connecting shaft (106) penetrates the reset cover (5), and the reset cover (5) is internally provided with an elastic sheet (501), one end of the elastic sheet (501) is fixedly arranged on the inner wall of the reset cover (5), and the other end is fixedly arranged on the connecting shaft (106), the connecting shaft (106) can compress the elastic sheet (501), and the side wall of the reset cover (5) is fixedly provided with a guide cylinder (502) sleeved on the outer part of the connecting shaft (106).

8. A self-latching pushrod lock according to claim 7, wherein: Both ends of the push rod (1) are bent sections (105), and a plurality of protective sleeves (104) are sleeved on the middle section of the push rod (1).

9. The self-latching pushrod lock of claim 1, wherein: The mounting surface of the support (2) is fixedly provided with a first fixed plate (206), and the mounting surface of the locking seat (3) is fixedly provided with a second fixed plate (303).

10. The method of using a self-latching push rod lock of any of claims 1-9, wherein, The following steps are included: a. Unlocking process: rotate the push rod (1), drive the screw rod (103) at the end of the push rod (1) to rotate, the rotation of the screw rod (103) drives the transmission block (6) connected with it to move linearly along the side wall of the support (2), the linear movement of the transmission block (6) makes its end enter and abut against the inner wall of the butt joint groove (302) of the driving block (301) on the locking seat (3), and the other end of the transmission block (6) is separated from the clamping block (203), at this time, continue to rotate the push rod (1), make the screw rod (103) push the driving block (301) to rotate through the butt joint of the transmission block (6) and the inner wall of the butt joint groove (302), and in turn drive the lock tongue (7) connected with the driving block (301) to retract, complete unlocking; b. Locking process: During the rotation of the push rod (1), the arc plate (4) connected to the mounting plate (101) rotates around the clamping seat (102), the rotation of the arc plate (4) makes it enter the mounting groove (201) of the side wall of the support (2), the spring (403) mounted on the mounting plate (101) pushes the arc plate (4) to move continuously towards the clamping block (203) in the mounting groove (201), when the lock tongue (7) is unlocked, the continuous pushing of the spring (403) makes the lock teeth (401) of the arc plate (4) and the clamping teeth (204) of the clamping block (203) mesh with each other, realizing the fixation of the arc plate (4) and completing the locking; c. Resetting process: During the locking process, the rotation of the push rod (1) makes the spring piece (501) in the reset cover (5) bend and store energy through the connecting shaft (106), presses the push block (402) on the top of the arc plate (4) towards the inside along the avoiding groove (205) of the side wall of the mounting groove (201), the inward movement of the push block (402) drives the arc plate (4) to rotate, so that the lock teeth (401) of the arc plate (4) and the clamping teeth (204) of the clamping block (203) disengage, the push block (402) is pushed upwards through the anti-skid pattern (402a) on the outer wall of the push block (402), releasing the restriction on the arc plate (4), at the same time, the spring piece (501) in the reset cover (5) releases the stored energy and drives the connecting shaft (106) to rotate reversely, the reverse rotation of the connecting shaft (106) drives the screw rod (103) to reverse, so that the lock tongue (7) extends, until the lock tongue (7) extends to the limit that the transmission block (6) cannot rotate to drive the transmission block (6) to move, the transmission block (6) exits from the butt joint groove (302) of the driving block (301) and moves reversely along the side wall of the support (2), the reverse rotation of the connecting shaft (106) drives the arc plate (4) and the push block (402) to reset at the same time, until the clamping groove (404) on the top of the push block (402) abuts against the top side wall of the avoiding groove (205), the resetting is completed.

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