A multi-point locking mechanism for doors and windows with self-locking function

Abstract

The utility model relates to a door and window multipoint locking mechanism with self-locking function belongs to door and window lock technical field. This door and window multipoint locking mechanism with self-locking function, include: installation frame and locking mechanism, the surface of installation frame is seted up with installation cavity, the inside of installation frame is seted up with the positioning slot of installation cavity intercommunication, the inboard rotation of installation cavity is connected with the handle, one end of handle is fixedly connected with the lock post, the opposite end of handle and lock post all is through the installation cavity, the surface of handle is seted up with the adjusting cavity, through the spring of always being in the compressed state and propelling the locking block sliding in the adjusting cavity, make locking block top automatic and with the positioning slot joint, realize handle position's fixed, do not need extra mechanical lock and key, effectively promoted the use convenience.

Description

Technical Field

[0001] This utility model relates to the field of door and window lock technology, and in particular to a multi-point locking mechanism for doors and windows with self-locking function. Background Technology

[0002] Multi-point locking structures for doors and windows, also known as multi-point locking systems, are commonly found in high-performance doors and windows. They utilize a handle to drive a mechanical linkage mechanism, causing multiple locking points to extend and retract synchronously along the perimeter of the window sash, firmly engaging with the window frame lock seat. This achieves simultaneous locking from multiple points, effectively improving resistance to deformation, sealing, and anti-theft performance.

[0003] However, even after the current structure is locked, an additional mechanical lock is usually required to secure the handle position and prevent accidental operation or external prying. While this improves security, users must keep their keys safe, as loss will affect normal use and reduce convenience. Utility Model Content

[0004] Therefore, it is necessary to address the issue that existing multi-point locking structures for doors and windows rely on additional keys for locking, which sacrifices ease of use while improving security. A self-locking multi-point locking mechanism for doors and windows should be provided.

[0005] A multi-point locking mechanism for doors and windows with self-locking function includes: a mounting frame and a locking mechanism. The mounting frame has a mounting cavity on its surface and a positioning groove communicating with the mounting cavity inside the mounting frame. A handle is rotatably connected to the inner side of the mounting cavity. A locking pin is fixedly connected to one end of the handle. The opposite ends of the handle and the locking pin both extend through the mounting cavity. An adjustment cavity is provided on the surface of the handle.

[0006] In one embodiment, the locking mechanism includes a locking block slidably connected inside the adjustment cavity, the top of the locking block extending through the adjustment cavity and engaging with a positioning groove, an adjustment rod fixedly connected to the bottom of the locking block, the bottom of the adjustment rod extending through the adjustment cavity, and a spring that is always in a compressed state sleeved on the surface of the adjustment rod.

[0007] In one embodiment, the top of the locking block has a right-angled triangle shape, and the inclined surface of the locking block faces away from the direction of the locking pin's unlocking rotation.

[0008] In one embodiment, the horizontal cross-sectional shape of the contact area between the adjustment cavity and the locking block is a matching rectangle, and the inclined surface of the locking block is always outside the adjustment cavity.

[0009] In one embodiment, the mounting frame has a limiting cavity that communicates with the mounting cavity and the positioning groove, and the top of the locking block extends through the limiting cavity to the outside of the limiting cavity.

[0010] In one embodiment, the vertical cross-sectional shape of the limiting cavity is a sector with an included angle of 90 degrees, and the center point of the limiting cavity coincides with the center point of the throttle.

[0011] In one embodiment, the adjusting rod is stepped in shape, and the corners of the adjusting rod are rounded.

[0012] In one embodiment, a limiting piece is fixedly connected to the surface of the adjusting rod, and the top of the spring contacts the bottom of the limiting piece.

[0013] In one embodiment, a pull ring is fixedly connected to the bottom of the adjusting rod, and the pull ring is circular in shape.

[0014] Beneficial effects

[0015] 1. The above-mentioned multi-point locking mechanism for doors and windows with self-locking function uses a spring that is always in a compressed state to push the locking block to slide inside the adjustment cavity, so that the top of the locking block automatically engages with the positioning groove, thereby fixing the position of the handle. No additional mechanical lock or key is required, which effectively improves the ease of use.

[0016] 2. The right-angled triangular cross-section design of the locking block enhances security by resisting external force reversal through the right-angled surface, while the inclined surface makes unlocking effortless and smooth. Combined with the pull ring at the bottom of the adjustment rod, it provides an intuitive operation point, making manual unlocking simple and convenient, further solving the inconvenience of relying on keys. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the locking execution module in this utility model;

[0020] Figure 3 for Figure 2 Schematic sectional view along the middle AA direction;

[0021] Figure 4 for Figure 2 Cross-sectional view along the middle BB direction;

[0022] Figure 5 This is a schematic diagram of the locking mechanism in this utility model.

[0023] Figure label:

[0024] 100. Mounting frame; 110. Mounting cavity; 120. Positioning groove; 130. Limiting cavity; 200. Thruster; 210. Adjusting cavity; 300. Locking pin; 400. Locking mechanism; 410. Locking block; 420. Adjusting rod; 430. Spring; 440. Limiting piece; 450. Pull ring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] The following is combined with Figure 1 - Figure 5 This invention describes a multi-point locking mechanism for doors and windows with a self-locking function.

[0027] In one embodiment, a multi-point locking mechanism for doors and windows with self-locking function includes a locking execution module. The locking execution module includes a mounting frame 100 and a locking mechanism 400. The surface of the mounting frame 100 has a mounting cavity 110. The interior of the mounting frame 100 has a positioning groove 120 communicating with the mounting cavity 110. A handle 200 is rotatably connected to the inner side of the mounting cavity 110. One end of the handle 200 is fixedly connected to a locking pin 300. The opposite ends of the handle 200 and the locking pin 300 both extend through the mounting cavity 110. An adjustment cavity 210 is formed on the surface of the handle 200.

[0028] The physical model of this multi-point locking mechanism for doors and windows is Southco's CR-19-55-15 series multi-point compression lock designed for outdoor applications. In addition to the structure mentioned above, it includes the following structures:

[0029] Housing and Mounting Adjustment Module: This module provides support, protection, and mounting adaptation for the system. The lock body housing is made of high-strength zinc alloy, steel, or engineering plastics, housing all internal mechanisms. The mounting holes on the housing and U-shaped latches are mostly oblong, allowing for necessary fine-tuning during installation to ensure accurate alignment of all locking points and latches. Some high-end models also feature independent height adjustment screws.

[0030] Steel drive core: Its standard rectangular cross-section dimensions are commonly 7mm x 7mm or 8mm x 8mm. This core runs through the lock body, directly connecting the indoor and outdoor handles to the internal gears. An additional key lock cylinder can be integrated into the outdoor handle, providing a higher level of security control.

[0031] Core Transmission Module: This module is the power conversion and distribution center of the system. The gear is fixedly mounted on the transmission core and rotates synchronously with it. The main rack is placed vertically and precisely meshes with the gear, converting the gear's 90-degree rotational motion into its own linear displacement. The rack's stroke determines the movement distance of the locking point, and its design ensures the synchronization and reliability of multiple actuators working together.

[0032] Locking Module: This module is fixed to the window frame and precisely engages with the locking points. The core component is a U-shaped latch, formed by metal stamping or casting. Its U-shaped or Omega-shaped cavity is precisely designed to accommodate and lock the locking points or latches in the locked position. Its installation firmness directly affects the overall system's anti-pry performance.

[0033] The working principle of this multi-point locking mechanism for doors and windows is as follows: The core of the system lies in converting rotational motion into linear motion and distributing power. The user inputs torque to the rectangular transmission core by rotating the handle approximately 90 degrees. The rotation of the core drives the gear fixed to it to rotate, and the gear meshes with the vertically arranged main rack, driving it to perform precise linear motion. The linear motion of the rack synchronously drives all locking points to move vertically upwards or downwards through a mechanical connection, ultimately causing the ends of the locking points to insert into or disengage from the U-shaped latches fixed to the window frame, completing the locking or unlocking action.

[0034] The multi-point locking mechanism for doors and windows operates as follows: The locking process begins with the user turning the handle 200 90 degrees. The handle 200 drives the locking pin 300, which transmits power to the gears via the transmission core, causing the gears to rotate. The gears then drive the main rack in a linear motion. The moving rack, through a mechanical connection, causes all locking points to move synchronously and vertically, precisely inserting them into the corresponding U-shaped locking blocks, thus forming a secure multi-point locking state. The unlocking process is the reverse of the above process.

[0035] It is important to note that when selecting a lock, the lock body size must perfectly match the groove of the door and window profile. Sufficient locking points should be chosen based on the size and weight of the door and window sashes. Attention should also be paid to the product's security level and material manufacturing process. The core of installation lies in using the oblong holes for precise positioning and adjustment, ensuring smooth and uninterrupted movement of all locking points, and ensuring that all fasteners, especially the U-shaped locking blocks, are securely and reliably installed. Routine maintenance requires regular cleaning of the moving parts of the lock body and lubrication with a dedicated dry lubricant. Avoid using oily lubricants that easily attract dust. Regularly check for loose fasteners and proper alignment of the locking points and latches.

[0036] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the locking mechanism 400 includes a locking block 410 slidably connected inside the adjustment cavity 210. Its top extends through the adjustment cavity 210 and engages with the positioning groove 120. The top of the locking block 410 has a right-angled triangular cross-section with its inclined surface facing away from the unlocking rotation direction of the locking pin 300. This design constitutes a one-way anti-reverse mechanism, which can both achieve a firm engagement through the right-angled surface to effectively resist external force reversal and utilize the inclined surface to make the unlocking operation more effortless and smooth. An adjusting rod 420 is fixedly connected to the bottom of the locking block 410. The bottom of the adjusting rod 420... The adjusting rod 420 extends through the adjusting cavity 210. Its shape is stepped with rounded corners. The stepped shape facilitates assembly and internal positioning, while the rounded corners reduce friction and stress concentration, improving wear resistance and lifespan. A spring 430, always under compression, is fitted onto the surface of the adjusting rod 420. The pre-compressed spring 430 provides continuous elastic restoring force, ensuring the automaticity and immediacy of the self-locking function. The horizontal cross-sectional shape of the contact area between the adjusting cavity 210 and the locking block 410 is a matching rectangle. This design strictly limits the locking block 410's position. The locking block 410 can only move in a straight line, ensuring the accuracy and reliability of its alignment with the positioning groove 120. The mounting frame 100 has a limiting cavity 130 inside, communicating with the mounting cavity 110 and the positioning groove 120. The top of the locking block 410 extends through the outside of the limiting cavity 130. The vertical cross-section of the limiting cavity 130 is a fan shape with an included angle of 90 degrees, and its center point coincides with the center point of the throttle 200. This structure provides precise guiding space for the movement of the locking block 410, ensuring that its movement trajectory perfectly matches the rotation arc of the throttle 200. The adjustment rod 420 is fixedly connected to a limiting plate 440, and the top of the spring 430 contacts the bottom of the limiting plate 440. The limiting plate 440 provides a stable and uniform force plane for the spring 430, preventing the spring 430 from deflecting or jamming and ensuring the reliability of force transmission. The bottom of the adjustment rod 420 is fixedly connected to a pull ring 450, which is circular in shape. The circular pull ring 450 provides a clear operating point that conforms to ergonomics, making manual unlocking operation more effortless, intuitive and convenient.

[0037] Working principle: When the user releases the throttle 200, the compressed spring 430 pushes the limiting plate 440, causing the locking block 410 to engage with the positioning groove 120 of the mounting frame 100. Automatic and immediate locking is achieved through the pre-compression force of the spring 430. The right-angled triangular bevel of the locking block 410 faces away from the unlocking direction, and in conjunction with the rectangular adjusting cavity 210, forms a reliable one-way anti-reverse mechanism, effectively preventing accidental rotation. To unlock, pulling down the pull ring 450 at the bottom of the adjusting rod 420 overcomes the spring force of the spring 430 to release the lock, making operation simple and effortless. The entire process is precisely guided by the fan-shaped limiting cavity 130, whose center coincides with the throttle 200, ensuring reliable and consistent action, while the stepped, rounded adjusting rod 420 ensures smooth movement and durability.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-point locking mechanism for doors and windows with self-locking function, characterized in that, include: A mounting frame (100) has a mounting cavity (110) on its surface and a positioning groove (120) communicating with the mounting cavity (110) inside the mounting frame (100). A handle (200) is rotatably connected to the inner side of the mounting cavity (110). A locking pin (300) is fixedly connected to one end of the handle (200). The opposite ends of the handle (200) and the locking pin (300) both extend out of the mounting cavity (110). An adjustment cavity (210) is provided on the surface of the handle (200). A locking mechanism (400) includes a locking block (410) slidably connected inside an adjustment cavity (210). The top of the locking block (410) extends through the adjustment cavity (210) and engages with a positioning groove (120). An adjustment rod (420) is fixedly connected to the bottom of the locking block (410). The bottom of the adjustment rod (420) extends through the adjustment cavity (210). A spring (430) that is always in a compressed state is sleeved on the surface of the adjustment rod (420).

2. The multi-point locking mechanism for doors and windows with self-locking function according to claim 1, characterized in that, The top cross-sectional shape of the locking block (410) is a right triangle, and the inclined surface of the locking block (410) faces away from the direction of the unlocking rotation of the locking pin (300).

3. The multi-point locking mechanism for doors and windows with self-locking function according to claim 1, characterized in that, The horizontal cross-sectional shape of the contact area between the adjustment cavity (210) and the locking block (410) is a matching rectangle, and the inclined surface of the locking block (410) is always outside the adjustment cavity (210).

4. The multi-point locking mechanism for doors and windows with self-locking function according to claim 1, characterized in that, The mounting frame (100) has a limiting cavity (130) inside that communicates with the mounting cavity (110) and the positioning groove (120), and the top of the locking block (410) extends through to the outside of the limiting cavity (130).

5. The multi-point locking mechanism for doors and windows with self-locking function according to claim 4, characterized in that, The vertical cross-sectional shape of the limiting cavity (130) is a fan shape with an included angle of 90 degrees, and the center point of the limiting cavity (130) coincides with the center point of the throttle (200).

6. The multi-point locking mechanism for doors and windows with self-locking function according to claim 1, characterized in that, The adjusting rod (420) is stepped in shape, and the corners of the adjusting rod (420) are rounded.

7. The multi-point locking mechanism for doors and windows with self-locking function according to claim 1, characterized in that, A limiting piece (440) is fixedly connected to the surface of the adjusting rod (420), and the top of the spring (430) contacts the bottom of the limiting piece (440).

8. The multi-point locking mechanism for doors and windows with self-locking function according to claim 1, characterized in that, The bottom of the adjusting rod (420) is fixedly connected to a pull ring (450), which is circular in shape.

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