A quick and convenient door lock

Abstract

This utility model discloses a quick and convenient door lock, including a housing, a latch, and a transmission mechanism. It also includes a one-handed handle and a linkage reset mechanism. The transmission mechanism includes a linkage rod, the first end of which is hinged to the handle, and the second end of which has an inclined cam surface. This quick and convenient door lock, through its unique structural design and component synergy, offers advantages such as one-handed operation, quick reset, and easy maintenance. It also significantly improves performance, lifespan, and reliability, providing users with a more convenient, safe, and reliable door lock experience and possessing significant technical support value.

Description

Technical Field

[0001] This utility model relates to the field of door lock technology, specifically a quick and convenient door lock. Background Technology

[0002] In the modern building and home furnishing sector, door locks, as core components for security, are of paramount importance in terms of ease of operation, structural reliability, and maintenance. Traditional door locks generally suffer from the following technical bottlenecks: First, their operation relies on two-handed operation or complex rotating structures, making them inconvenient for single-handed operation scenarios such as carrying items, and failing to meet the need for rapid passage; second, the reset mechanism often uses a single spring drive, which is prone to problems such as handle jamming and incomplete lock tongue reset, resulting in unstable locking; third, the transmission components are mostly rigid connections or sliding friction structures, which are prone to wear and tear over long-term use, leading to decreased transmission efficiency, and disassembly of components requires tools, resulting in high maintenance costs; fourth, the lock tongue positioning lacks an effective limiting device, which can easily cause jamming or damage due to excessive extension, affecting the lifespan of the door lock. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a fast and convenient door lock that can effectively solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A quick and convenient door lock includes a housing, a bolt, and a transmission mechanism, as well as a one-handed handle and a linkage reset mechanism. The transmission mechanism includes a linkage rod, the first end of which is hinged to the handle, and the second end of which is provided with an inclined cam surface.

[0006] The latch is slidably disposed inside the housing in a horizontal direction. A roller is provided on the side of the latch facing the linkage rod. The roller rolls in contact with the inclined cam surface. The linkage reset mechanism includes a first reset spring and a second reset spring connected between the handle and the housing. The two ends of the second reset spring are respectively fixed to the latch and the housing. Under normal conditions, the second reset spring pushes the latch to extend in the locking direction.

[0007] As a further description of the above technical solution, the handle is a push-button lever structure, and the fulcrum of the handle is fixed to the outer shell.

[0008] As a further description of the above technical solution, the linkage rod and the handle are connected by a detachable snap-fit ​​structure, the snap-fit ​​structure including a U-shaped groove at the first end of the linkage rod and a cylindrical pin on the handle.

[0009] As a further description of the above technical solution, the inclination angle of the inclined cam surface is 30°-60°, and the surface of the inclined cam surface is provided with a wear-resistant coating.

[0010] As a further description of the above technical solution, the sliding path of the latch is provided with a limiting block for limiting the maximum extension position of the latch, and the limiting block is integrally formed with the outer shell.

[0011] As a further description of the above technical solution, the roller is mounted on the locking tongue via a miniature bearing, and the axis of the roller is perpendicular to the direction of movement of the linkage rod.

[0012] As a further description of the above technical solution, the outer casing includes a front cover and a rear cover, the front cover having an opening for the handle to move, and the rear cover having a through hole for the latch to extend.

[0013] As a further description of the above technical solution, the second return spring is symmetrically arranged on both sides of the latch, and the axis of the second return spring is parallel to the sliding direction of the latch.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model provides a quick and convenient door lock that has at least one of the following beneficial effects during use:

[0016] Featuring a push-button lever handle and a linked reset mechanism, this lock allows for a quick "press to unlock, release to lock" process with just one hand, significantly improving ease of use, especially suitable for scenarios involving single-handed loads. The linkage rod and handle are connected by a detachable snap-fit, allowing for quick assembly and disassembly without tools, reducing maintenance costs and improving maintainability. An angled cam surface (30°-60° tilt angle) combined with miniature bearing rollers converts sliding friction into rolling friction; combined with a wear-resistant coating, this effectively improves transmission efficiency and extends component life. Symmetrically arranged second reset springs and an integrated limit stop ensure even force distribution and smooth movement of the latch, preventing jamming or over-extension. Together with the first reset spring, they achieve a dual-spring linked reset, ensuring a stable and reliable locked state. The split-shell structure rationally plans the component installation space, resulting in a compact overall layout that balances structural strength and operational reliability. Attached Figure Description

[0017] Fig. 1 This is a schematic diagram of the overall structure of a quick and convenient door lock according to the present invention;

[0018] Fig. 2 This is a side view of the structure of a quick and convenient door lock according to the present invention.

[0019] Fig. 3This is a perspective structural diagram of a quick and convenient door lock according to the present invention.

[0020] Numbering on the map:

[0021] 1. Outer shell; 101. Handle; 102. Locking tongue; 103. Cylindrical pin; 104. U-shaped slot; 105. Limiting block; 106. Front cover; 107. Rear cover; 2. Linkage reset mechanism; 201. First reset spring; 202. Second reset spring; 3. Transmission mechanism; 301. Linkage rod; 302. Angled cam surface; 303. Roller. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figs. 1-3 As shown, this utility model provides a quick and convenient door lock, including a housing 1, a latch 102 and a transmission mechanism 3. The feature is that it also includes a single-handed handle 101 and a linkage reset mechanism 2. The transmission mechanism 3 includes a linkage rod 301. The first end of the linkage rod 301 is hinged to the handle 101, and the second end of the linkage rod 301 is provided with an inclined cam surface 302.

[0024] When handle 101 is pressed, the inclined cam surface 302 of the linkage rod 301 presses down the roller 303, driving the locking tongue 102 to retract laterally to unlock. After releasing the handle, the linkage reset mechanism 2 automatically resets and locks the handle. The linkage reset mechanism 2 keeps handle 101 in the raised state under normal conditions.

[0025] The latch 102 is slidably disposed inside the housing 1 in the horizontal direction. A roller 303 is provided on the side of the latch 102 facing the linkage rod 301. The roller 303 rolls in contact with the inclined cam surface 302. The linkage reset mechanism 2 includes a first reset spring 201 and a second reset spring 202 connected between the handle 101 and the housing 1. The two ends of the second reset spring 202 are respectively fixed to the latch 102 and the housing 1. Under normal conditions, the second reset spring 202 pushes the latch 102 to extend in the locking direction.

[0026] In this embodiment, under normal conditions, the second return spring 202 (with its two ends fixed to the latch 102 and the outer casing 1 respectively) is in a stretched state. Its elastic force pushes the latch 102 in the locking direction (usually a horizontal extension direction), causing the latch 102 to extend out of the through hole in the outer casing 1 and engage with the door frame lock hole, thus achieving the locking function of the door lock. Simultaneously, the first return spring 201 is connected between the handle 101 and the outer casing 1, maintaining the handle 101 in a raised state through its elastic force, ensuring that the handle 101 is in its initial position.

[0027] When the user presses the handle 101 with one hand, the handle 101, acting as a push-button lever structure (with its fulcrum fixed to the outer shell 1), rotates around the fulcrum, causing the first end of the linkage rod 301, hinged to the handle 101, to move downwards. The inclined cam surface 302 at the second end of the linkage rod 301 then moves downwards. As the cam surface rolls into contact with the roller 303 on the latch 102 (mounted via a miniature bearing, its axis perpendicular to the direction of movement of the linkage rod 301), the inclined plane force formed by the tilt angle (30°-60°) of the inclined cam surface 302 pushes the roller 303, thereby driving the latch 102 to overcome the resistance of the second return spring 202 and retract laterally into the outer shell 1, completing the unlocking action. At this time, the limiting stop 105 (integrated with the outer shell 1) on the sliding path of the latch 102 restricts the maximum retraction position of the latch 102, ensuring the stability of the unlocked state.

[0028] After the user releases the handle, the linkage reset mechanism 2 begins to operate. The elastic force of the first reset spring 201 pushes the handle 101 back to its raised state, simultaneously resetting the linkage rod 301. As the cam surface disengages from the roller 303, the elastic force of the second reset spring 202 comes into play again, pushing the latch 102 to extend in the locking direction. The roller 303 rolls back along the cam surface until the latch 102 reaches the maximum extension position limited by the limit stop 105, and the door lock returns to the locked state.

[0029] Furthermore, the handle 101 is a push-button lever structure, and the fulcrum of the handle 101 is fixed to the outer casing 1. With its push-button lever structure, the handle 101 allows users to unlock the door with just one hand, greatly improving ease of operation compared to traditional door locks that require two hands or complex turning. It is especially suitable for use in one-handed operation scenarios such as carrying items.

[0030] After releasing the handle, the lock automatically resets via the linkage reset mechanism 2, requiring no additional operation and achieving a quick "one-press unlock, release lock" process, thus improving the efficiency of door lock usage.

[0031] Furthermore, the linkage rod 301 and the handle 101 are connected by a detachable snap-fit ​​structure. This snap-fit ​​structure includes a U-shaped groove 104 at the first end of the linkage rod 301 and a cylindrical pin 103 on the handle 101. When the handle 101 is pressed, the cylindrical pin 103 moves within the U-shaped groove 104, converting the lever motion of the handle 101 into the up-and-down swinging motion of the linkage rod 301, thus transmitting force. This detachable snap-fit ​​structure between the linkage rod 301 and the handle 101 allows for quick disassembly and installation without tools during maintenance or component replacement, reducing repair difficulty and cost, and improving the maintainability of the door lock.

[0032] Furthermore, the inclined angle of the inclined cam surface 302 is 30°-60°, and the surface of the inclined cam surface 302 is provided with a wear-resistant coating. The inclined design of the inclined cam surface 302 allows the cam surface to effectively press down on the roller 303 when the handle 101 is pressed, converting the vertical pressing force into the horizontal retraction force of the latch 102. The roller 303 is mounted through a miniature bearing, reducing friction between it and the cam surface and improving transmission efficiency. At the same time, the axis of the bearing is perpendicular to the movement direction of the linkage rod 301, ensuring smooth rolling of the roller 303.

[0033] Furthermore, the sliding path of the latch 102 is provided with a limiting block 105 for limiting the maximum extension position of the latch 102, and the limiting block 105 is integrally formed with the outer shell 1. The limiting block 105 on the sliding path of the latch 102 is integrally formed with the outer shell 1, which precisely limits the maximum extension position of the latch 102, avoids the latch 102 from over-extending and causing jamming or damage, and ensures the stability and reliability of the movement of the latch 102.

[0034] Furthermore, the roller 303 is mounted on the latch 102 via a miniature bearing, and the axis of the roller 303 is perpendicular to the direction of movement of the linkage rod 301. The outer casing 1 includes a front cover 106 and a rear cover 107. The front cover 106 has an opening for the handle 101 to move, and the rear cover 107 has a through hole for the latch 102 to extend out. The second return spring 202 is symmetrically arranged on both sides of the latch 102, and the axis of the second return spring 202 is parallel to the sliding direction of the latch 102.

[0035] The first return spring 201 and the second return spring 202 maintain the initial positions of the handle 101 and the latch 102 respectively under normal conditions. After the handle is released, the elastic force of the two springs drives each component to reset, realizing the automatic reset function of the door lock. The second return spring 202 is symmetrically arranged on both sides of the latch 102, and its axis is parallel to the sliding direction of the latch 102, ensuring that the latch 102 is subjected to uniform force and the reset process is stable and reliable.

[0036] The second return spring 202 is symmetrically arranged on both sides of the latch 102, and its axis is parallel to the sliding direction of the latch 102. This makes the latch 102 subjected to uniform force during the reset process, reduces the phenomenon of deflection or jamming caused by uneven force, and improves the stability of the movement of the latch 102.

[0037] In summary, through the cooperation of the first return spring 201 and the second return spring 202, as well as the precise connection and cooperation between various components, the door lock can maintain a stable locked state under normal conditions. The pressing to unlock and releasing to reset processes are smooth and reliable, effectively avoiding door lock malfunctions caused by loose components or poor reset, thus improving the reliability and stability of the door lock. This quick and convenient door lock, through its unique structural design and the synergistic effect of its components, possesses advantages such as one-handed operation, quick reset, and easy maintenance. It also shows significant improvements in performance, lifespan, and reliability, providing users with a more convenient, safe, and reliable door lock experience and possessing significant technical support value.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A quick and convenient door lock, comprising a housing, a bolt, and a transmission mechanism, characterized in that: It also includes a single-handed handle and a linkage reset mechanism. The transmission mechanism includes a linkage rod, the first end of which is hinged to the handle, and the second end of which is provided with an inclined cam surface. The latch is slidably disposed inside the housing in a horizontal direction. A roller is provided on the side of the latch facing the linkage rod. The roller rolls in contact with the inclined cam surface. The linkage reset mechanism includes a first reset spring and a second reset spring connected between the handle and the housing. The two ends of the second reset spring are respectively fixed to the latch and the housing. Under normal conditions, the second reset spring pushes the latch to extend in the locking direction.

2. The quick and convenient door lock according to claim 1, characterized in that: The handle is a push-button lever structure, and the fulcrum of the handle is fixed to the outer shell.

3. The quick and convenient door lock according to claim 1, characterized in that: The linkage rod and the handle are connected by a detachable snap-fit ​​structure, which includes a U-shaped groove at the first end of the linkage rod and a cylindrical pin on the handle.

4. A quick and convenient door lock according to claim 1, characterized in that: The inclined angle of the inclined cam surface is 30°-60°, and the surface of the inclined cam surface is provided with a wear-resistant coating.

5. A quick and convenient door lock according to claim 1, characterized in that: The sliding path of the latch is provided with a limiting block for limiting the maximum extension position of the latch, and the limiting block is integrally formed with the outer shell.

6. A quick and convenient door lock according to claim 1, characterized in that: The roller is mounted on the locking tongue via a miniature bearing, and the axis of the roller is perpendicular to the direction of movement of the linkage rod.

7. A quick and convenient door lock according to claim 1, characterized in that: The housing includes a front cover and a rear cover. The front cover has an opening for the handle to move, and the rear cover has a through hole for the latch to extend.

8. A quick and convenient door lock according to claim 1, characterized in that: The second return spring is symmetrically arranged on both sides of the latch, and the axis of the second return spring is parallel to the sliding direction of the latch.

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