Automatic window locking mechanism for fireproof door and window

Abstract

The utility model relates to an automatic window locking mechanism of a fireproof door and window, which comprises a first component and a second component, the first component comprises a connecting rod and a lock bolt arranged on the connecting rod, the second component comprises a locking seat, a locking block and an axial reset mechanism, a locking groove is arranged on the locking block, one end of the locking block facing the locking groove is hinged with a swing shifting block, and the swing shifting block is connected with the axial reset mechanism. The locking seat is provided with a swing reset mechanism enabling the swing shifting block to be squeezed by the lock bolt to swing and reset, the lock bolt can axially move along with the connecting rod, then the lock bolt axially enters or breaks away from the locking groove, and when the lock bolt axially breaks away from the locking groove, the swing shifting block is squeezed by the lock bolt to swing and then reset through the swing reset mechanism. The mechanism can be automatically locked after being closed through mechanical linkage and a double-reset mechanism without manual intervention, the problem that an existing fireproof window depends on manual operation or sealing is insufficient due to the fact that a single spring bolt is prone to failure is solved, and locking stability and operation reliability are improved.

Description

Technical Field

[0001] This utility model relates to the field of fireproof doors and windows, and in particular to an automatic locking mechanism for fireproof doors and windows. Background Technology

[0002] With the development of my country's construction industry, the requirements for building doors and windows, especially fire-resistant windows installed on exterior walls, are becoming increasingly stringent. These fire-resistant windows must effectively block smoke and flames to prevent significant losses during fires. To achieve better fire resistance, fire-resistant windows are required to automatically close in the event of a fire. While most existing fire-resistant doors and windows can achieve this, their structures only provide automatic closing and lack automatic locking. This means that the window sash may still open after closing, resulting in insufficient sealing performance and potential safety hazards. Manually turning the handle to lock the window is difficult to implement in a fire. Therefore, there is an urgent need for a window locking mechanism that automatically locks the fire-resistant window after it closes to solve this problem. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an automatic window locking mechanism for fireproof doors and windows, addressing the shortcomings of the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic window locking mechanism for fireproof doors and windows, comprising a first component and a second component respectively installed on the window sash and window frame. The first component includes a connecting rod and a bolt disposed on the connecting rod. The second component includes a locking seat, a locking block slidably connected to the locking seat, and an axial reset mechanism for resetting the locking block. The locking block has a locking groove for accommodating and locking the bolt. A swinging block is hinged to one end of the locking block facing the locking groove. The locking seat is provided with a swinging reset mechanism for the swinging block to swing under the pressure of the bolt and then reset. The bolt can move axially with the connecting rod, thereby axially entering or disengaging from the locking groove. When the bolt axially disengages from the locking groove, the swinging block is squeezed and swung by the bolt and then reset by the swinging reset mechanism.

[0005] Using the above technical solution, the automatic window locking mechanism for fireproof doors and windows drives the bolt axially through a connecting rod in the first component. In the open state, it precisely inserts into the locking groove on the locking block of the second component to achieve automatic locking. When the bolt disengages from the locking groove, the side of the bolt presses against the swing block hinged at the end of the locking block, forcing the swing block to swing outward around the hinge point. At the same time, the swing reset mechanism stores energy. After the bolt is completely disengaged, the swing reset mechanism releases the stored energy to reset the swing block to its initial position, preventing the bolt from accidentally falling back. The locking block cooperates with the locking seat through a sliding connection. Driven by an axial reset mechanism, the locking groove is always aligned with the bolt's movement path. During the window sash closing process, when the bolt contacts the arc-shaped guide surfaces on both sides of the locking groove, the locking block slides to avoid the bolt until the window sash is fully closed and then resets, achieving precise engagement between the bolt and the locking groove. This effectively prevents the window sash from being opened a second time. Through mechanical linkage and a double reset mechanism, this mechanism can automatically lock after closing without manual intervention, solving the problem of insufficient sealing caused by manual operation or the easy failure of a single spring lock tongue in existing fireproof windows, thus improving locking stability and operational reliability.

[0006] The aforementioned automatic window locking mechanism for fireproof doors and windows can be further configured such that: one end of the swing block is hinged to the locking block, and the other end is provided with a swing avoidance part; one end of the swing avoidance part has an abutment surface, and the end facing the locking groove is provided with at least one swing guide surface; the swing avoidance part is kept on the same axis as the locking groove through a swing reset mechanism.

[0007] Using the above technical solution, the swing guide surface can be one or more surfaces. One end of the swing block is connected to the locking block via a hinge shaft, allowing it to rotate around the hinge point. The other end is provided with a swing relief part, which includes a contact surface and a swing guide surface. The contact surface is located at the end of the swing relief part and is used to fit against its side after the bolt disengages from the locking groove, forming a mechanical limit to prevent the bolt from accidentally moving back due to external force or vibration. The swing guide surface is located at the end of the swing relief part facing the locking groove. When the bolt moves axially away from the locking groove, its side slides precisely along the inclined surface of the swing guide surface, forcing the swing block to swing to one side around the hinge axis. At this time, the swing reset mechanism accumulates... The elastic potential energy is released by the swing reset mechanism after the bolt is completely disengaged, driving the swing block to reset to its initial vertical state. This ensures that the axis of the swing avoidance part coincides with the axis of the locking groove, guaranteeing stability during subsequent pressing and unlocking. The angle of the swing guide surface is strictly matched with the bolt's movement trajectory, reducing frictional resistance. At the same time, the torque of the swing reset mechanism is calibrated to ensure rapid reset of the swing block and no fatigue attenuation during long-term use. Thus, without manual intervention, stable anti-reverse movement after bolt disengagement and precise guidance of the locking path are achieved, solving the risks of bolt jamming and secondary opening caused by reset deviation or insufficient guidance in traditional fireproof window locking mechanisms.

[0008] The aforementioned automatic window locking mechanism for fireproof doors and windows can be further configured such that: arc-shaped or wedge-shaped bolt guide surfaces are formed on both sides of the locking groove; when the bolt abuts against the bolt guide surface, the locking seat slides to avoid the bolt.

[0009] Using the above technical solution, when the window sash is closed, the bolt moves axially with the connecting rod and contacts the guide surface. The arc-shaped or wedge-shaped structure converts the lateral compressive force of the bolt into the displacement of the locking seat along the sliding direction, forcing the locking block to temporarily move backward to avoid the bolt. During this process, the guide surface guides the bolt to slide into the center of the locking groove along a predetermined path, avoiding jamming or wear caused by the bolt's hard collision with the groove. When the locking block slides to avoid the bolt, the axial reset mechanism stores energy. After the bolt is fully inserted into the locking groove, the reset mechanism releases the elastic force to drive the locking block to reset to the initial position, so that the locking groove and the bolt are locked. This solves the problem of locking failure or difficult operation caused by misalignment of traditional rigid locking grooves.

[0010] The aforementioned automatic window locking mechanism for fireproof doors and windows can be further configured such that: the end of the swing avoidance part facing the locking groove is provided with two mirror-symmetrical swing guide surfaces, and the intersection of the swing guide surfaces rests on the axis of the locking groove.

[0011] Using the above technical solution, when the bolt disengages from the locking groove, the side of the bolt contacts the swing guide surface. The symmetrical V-shaped or arc-shaped guide surface decomposes the axial movement force of the bolt into a lateral component, forcing the swing block to swing outward around the hinge axis, avoiding a hard collision between the bolt and the edge of the locking groove. The mirror symmetry design of the two guide surfaces ensures that the bolt can slide out of the locking groove along the same trajectory regardless of which side it is biased towards, improving the product's adaptability to different window sashes. The intersection point is strictly aligned with the axis of the locking groove, ensuring that the bolt always moves along the central path during disengagement, guaranteeing that the axis of the locking groove and the bolt path are precisely aligned after the swing block is reset, providing a guiding reference for the next locking.

[0012] The aforementioned automatic window locking mechanism for fireproof doors and windows can be further configured such that: the locking seat has a sliding groove for guiding the locking block, and the sliding groove is arranged parallel to the movement direction of the connecting rod.

[0013] By adopting the above technical solution, the extension direction of the slide groove is strictly parallel to the movement direction of the connecting rod, ensuring that the locking block always moves along the axial trajectory of the bolt during the sliding process, avoiding the misalignment of the bolt and the locking groove due to path deviation, and significantly improving the repeatability and long-term stability of the locking action.

[0014] The aforementioned automatic window locking mechanism for fireproof doors and windows can be further configured such that: the locking block and the swing block are connected by a hinge shaft, one end of the hinge shaft is connected to the locking block, and the other end passes through the slide groove and is provided with a first anti-disengagement block; a connecting shaft passes between the locking block and the slide groove, one end of the connecting shaft is connected to the locking block, and the other end passes through the slide groove and is provided with a second anti-disengagement block.

[0015] Using the above technical solution, the locking block and the swing block are connected by a hinge shaft. One end of the hinge shaft is fixed to the locking block, and the other end passes through the slide groove and is equipped with a first anti-detachment block. Its diameter is larger than the inner diameter of the slide groove, which effectively limits the displacement range of the hinge shaft in the slide groove and prevents the swing block from detaching from the slide groove due to excessive swinging or external impact. A connecting shaft is also provided between the locking block and the slide groove. One end of the connecting shaft is fixed to the locking block, and the other end passes through the slide groove and is equipped with a second anti-detachment block. Its diameter is also larger than the inner diameter of the slide groove. By constraining the sliding trajectory of the locking block by the dual axes, it is ensured that the locking block can only move in the parallel direction of the slide groove, avoiding axis deviation and improving the stability of the sliding lock.

[0016] The aforementioned automatic window locking mechanism for fireproof doors and windows can be further configured such that: the axial reset mechanism includes a reset torsion spring, one end of which is connected to a locking seat, and the other end is connected to a swing block or a locking block, and drives the locking block to move toward the end of the locking groove with an opening.

[0017] Using the above technical solution, the reset torsion spring in the axial reset mechanism is fixed at one end to the locking seat and connected to the swing block or locking block at the other end. It provides directional driving force when the bolt disengages from the locking groove, forcing the locking block to slide along the slide groove to the opening end of the locking groove to reset. This ensures that the mechanism automatically resets after each locking, significantly improving the sealing performance and reliability of the fireproof window under repeated opening and closing conditions.

[0018] The aforementioned automatic window locking mechanism for fireproof doors and windows can be further configured such that: one end of the locking seat corresponding to the swing block is provided with a swing groove that communicates with the slide groove, and one end of the swing block is provided with a reset connection part for passing through the locking seat and connecting with the reset torsion spring.

[0019] By adopting the above technical solution, the reset connection is set to swing within the swing groove, which limits the swing space, avoids excessive swinging and floating that prevents it from resetting, and improves stability.

[0020] The aforementioned automatic window locking mechanism for fireproof doors and windows can be further configured such that: the locking block and the swing block are connected by a hinge shaft, one end of the hinge shaft is connected to the locking block, and the other end passes through the slide groove and is provided with a first anti-detachment block, the diameter of the first anti-detachment block is larger than the inner diameter of the slide groove, and there is a sliding narrow section between the swing groove and the slide groove, the path of the sliding narrow section is smaller than the diameter of the hinge shaft.

[0021] Using the above technical solution, the locking block and the swing block are connected by a hinge shaft. One end of the hinge shaft is fixed to the locking block, and the other end passes through the slide groove and is equipped with a first anti-disengagement block with a diameter larger than the inner diameter of the slide groove. This block physically limits the hinge shaft from coming out of the slide groove. The width of the sliding narrow section between the swing groove and the slide groove is smaller than the diameter of the hinge shaft. When the locking block slides along the slide groove, the sliding narrow section limits the hinge shaft, preventing it from entering the swing groove. This ensures the motion stability of the hinge shaft during long-term use, prevents the gap from widening due to wear, and significantly improves the durability of the mechanism and the repeatability of the locking action.

[0022] The aforementioned automatic window locking mechanism for fireproof doors and windows can be further configured as follows: the swing reset mechanism includes a reset connecting part disposed on the swing block and an elastic reset member disposed on the locking seat. The locking seat has a swing groove at one end corresponding to the swing block, and the elastic reset member has a reset elastic part at at least one end corresponding to the reset connecting part. The reset connecting part passes through the swing groove and stops on one side of the reset elastic part.

[0023] Using the above technical solution, after the reset connection of the swing block passes through the swing groove on the locking seat, it is clamped and restricted by the reset elastic parts at both ends of the elastic reset member, forming a bidirectional elastic constraint. When the bolt disengages from the locking groove and pushes the swing block to swing, the reset connection squeezes one side of the reset elastic part to cause it to elastically deform and accumulate reset potential energy. At the same time, the deformation recovery force on this side or the reset elastic part on the other side provides a balancing force through reverse deformation to prevent the reset connection from shifting. After the bolt is completely disengaged, the compressed reset elastic part releases its elastic potential energy and drives the reset connection to drive the swing block to accurately reset to the initial vertical position. The reset elastic part of the elastic reset member can be a shape memory metal or a torsion spring, providing sufficient reset force while avoiding excessive deformation that could lead to fatigue fracture.

[0024] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0026] Figure 2 This is a three-dimensional schematic diagram of the second component in an embodiment of the present utility model. Figure 1 .

[0027] Figure 3 This is a three-dimensional schematic diagram of the second component in an embodiment of the present utility model. Figure 2 .

[0028] Figure 4 This is a schematic diagram showing the connection between the present invention and the door / window handle.

[0029] Figure 5This is a schematic diagram of the locked state of an embodiment of the present invention.

[0030] Figure 6 This is a three-dimensional schematic diagram of the locked state according to an embodiment of the present invention.

[0031] Figure 7 This is a structural schematic diagram of the first unlocked state according to an embodiment of the present invention.

[0032] Figure 8 This is a perspective view of the first unlocked state according to an embodiment of the present invention.

[0033] Figure 9 This is a structural schematic diagram of the second unlocked state according to an embodiment of the present invention.

[0034] Figure 10 This is a perspective view of the second unlocked state according to an embodiment of the present invention.

[0035] Figure 11 This is a structural schematic diagram of the third unlocked state according to an embodiment of the present invention.

[0036] Figure 12 This is a perspective view of the third unlocked state according to an embodiment of the present invention.

[0037] Figure 13 for Figure 7 A sectional view along the AA direction.

[0038] Figure 14 This is a rendering of the effect when the present invention is used in a fireproof door and window system. Implementation

[0039] like Figures 1-14 As shown, an automatic window locking mechanism for fireproof doors and windows includes a first component 1 installed on a window sash A and a second component installed on a window frame B. The first component 1 includes a connecting rod 11 and a bolt 12 disposed on the connecting rod 11. The second component 2 includes a locking seat 21, a locking block 3 slidably connected to the locking seat 21, and an axial reset mechanism for resetting the locking block 3. The locking block 3 has a locking groove 31 for accommodating and locking the bolt 12. The locking groove 31 has arc-shaped bolt guide surfaces 32 formed on both sides. When the bolt 12 engages with the bolt guide surface... When the bolt 12 is in contact with the locking seat 21, the locking seat 21 slides to avoid the bolt 12. The locking block 3 is hinged to the swinging block 4 facing the locking groove 31. The locking seat 21 is provided with a swinging reset mechanism that causes the swinging block 4 to swing under the pressure of the bolt 12 and then reset. The bolt 12 can move axially with the connecting rod 11, thereby causing the bolt 12 to enter or leave the locking groove 31 axially. When the bolt 12 is axially disengaged from the locking groove 31, the swinging block 4 is squeezed and swung by the bolt 12 and then reset by the swinging reset mechanism to prevent the bolt 12 from falling back into the locking groove 31.

[0040] like Figures 1-13 As shown, one end of the swing block 4 is hinged to the locking block 3 via a hinge shaft 33, and the other end is provided with a swing relief part 41. One end of the swing relief part 41 has an abutment surface 411, and the end facing the locking groove 31 has two mirror-symmetrical swing guide surfaces 412. The intersection of the swing guide surfaces 412 rests on the central axis C of the locking groove 31. The locking seat 21 has a sliding groove 22 for guiding the locking block. The sliding groove 22 is parallel to the movement direction of the connecting rod 11. The locking seat 21 has a swing groove 23 at one end corresponding to the swing block 4, which communicates with the sliding groove 22. One end of the swing block 4 has a return spring 5 for passing through the swing groove 23 and connecting to the return torsion spring 5. The locking block 3 and the swing block are connected by a hinge shaft 33. One end of the hinge shaft 33 is connected to the locking block 3, and the other end passes through the swing block 4 and the slide groove 22 and is provided with a first anti-detachment block 331. A connecting shaft 34 passes between the locking block 3 and the slide groove 22. One end of the connecting shaft 34 is connected to the locking block 3, and the other end passes through the slide groove 22 and is provided with a second anti-detachment block 341. The diameters of the first anti-detachment block 331 and the second anti-detachment block 341 are both larger than the inner diameter of the slide groove 22. There is a sliding narrow part 24 between the swing groove 23 and the slide groove 22. The path of the sliding narrow part 24 is smaller than the diameter of the hinge shaft 33 to prevent the locking block 3 from detaching from the slide groove 22.

[0041] like Figures 1-13 As shown, the axial reset mechanism includes a reset torsion spring 5. One end of the reset torsion spring 5 is connected to the torsion spring fixing part 25 on the locking seat 21, and the other end is connected to the reset connecting part 42 on the swing block 4. It drives the locking block 3 to form an upward reset pull towards the end of the locking groove 31 with an opening. The swing reset mechanism includes a reset connecting part 42 provided on the swing block 4 and an elastic reset member 6 provided on the locking seat 21. The elastic reset member 6 has reset elastic parts 61 at both ends corresponding to the reset connecting part 42. After the reset connecting part 61 passes through the swing groove 23, it is restricted between two adjacent reset elastic parts 61. The elastic reset member 6 can be an elastic memory metal or a reset torsion spring 6.

[0042] like Figure 3As shown, the swing reset mechanism includes a reset connecting part 42 disposed on the swing block 4 and a reset torsion spring 6 disposed on the locking seat 21. The helical torsion part 62 of the reset torsion spring 6 is fitted onto the torsion spring fixing part 25. The two swing feet 61 of the reset torsion spring 6 are disposed on both sides of the reset connecting part 61. When the swing block 4 is squeezed and swung by the locking bolt 12, the reset torsion spring 6 stores energy. After the locking bolt 12 is released, the reset torsion spring 6 releases torque to reset the swing block 4. In order to reduce the reset stroke of the reset torsion spring 6 and improve the reset sensitivity, a limiting fastening wire 62 is provided in the middle of the swing feet 61 of the reset torsion spring 6. After the limiting fastening wire 62 passes through the locking seat 21, it clamps the middle of the swing feet 61 onto the locking seat 21. At the same time, the torsion spring fixing part 25 is preferably integrally formed with the locking seat 21 and then cut and bent. The reset connecting part 42 is preferably integrally formed with the swing block 4 and then cut and bent.

[0043] like Figure 4 and Figure 14 As shown, when the automatic window locking mechanism of this utility model is used in a fireproof door and window system, the fireproof door and window system includes a window sash A, a window frame B, a fireproof window closer D, and a door and window handle E. The connecting rod 11 of the first component 1 is installed on the window sash A and is driven by the door and window handle E to move axially up and down along the groove of the window sash A. Specifically, a linkage part 111 is provided on the connecting rod 11, and manual locking points 112 are provided at both ends. The door and window handle E is installed on the window sash A, passes through the window sash A, and is connected to the linkage part 111. The door and window handle E is preferably a two-point door and window handle E, and the door and window handle E can be 0° A 90° rotation causes the connecting rod 11 to slide axially up and down. The window sash B has a manual locking groove B1 that engages with the manual locking point 112. When the door / window handle E is initially at 0°, the manual locking point 112 and the manual locking groove B1 are misaligned, and the bolt 12 and the locking groove 31 are both in the first position h1. When the window sash A is closed, the bolt 12 will come into contact with the bolt guide surface 32, and the locking seat 21 will slide downwards along the bolt guide surface 32 to avoid the bolt 12, thus allowing the bolt 12 to enter the locking groove 31. Then, the bolt is reset by the return torsion spring 5. See the attached diagram for this state. Figure 5 , Figure 6 The locked state diagram shows that the bolt 12 is engaged with the locking groove 31 to lock, thus completing the automatic locking function of the fireproof window.

[0044] like Figure 4 and Figure 14 As shown, when the fireproof window needs to be opened after it has been locked, simply rotate the door / window handle E to 90°. (See diagram below.) Figure 7 , Figure 8 , Figure 13In the first unlocked state diagram shown, the bolt 12 moves upward with the connecting rod 11 and disengages from the locking groove 31, then abuts against the upper swing relief part 41. The swing relief part 41 is V-shaped. Guided by the swing guide surface 412, the bolt 12 moves the swing lever 4 to one side and enters the abutment surface 411 above the swing relief part 41. The return torsion spring 6 assists the swing lever 4 in automatically resetting and aligning. The abutment surface 411 abuts against the bolt 12, preventing the bolt 12 from falling back into the locking groove 21. (See diagram below.) Figure 9 , Figure 10 The second unlocked state diagram shows that the bolt 12 is in the second position h2 and positioned above the abutment surface 411. Without the standard manual locking groove B1, the window can be opened directly. However, the standard configuration of a fireproof window includes a manual locking groove B1 on the window frame B. When the bolt 12 is in the second position h2, the manual locking point 112 on the connecting rod 11 will also move upwards into the manual locking groove B1, manually locking the window sash A and window frame B. In this state, the window sash A cannot be opened normally. Then, the door and window handle E is rotated 90° in the opposite direction to return to its initial state. At this time, the connecting rod 11 will move downwards again, and then... Figure 11 , Figure 12 As shown in the third unlocking state diagram, the bolt 12 will push the swing block 4 and the locking block 3 to move down along the slide groove 22 together to overcome the force of the reset spring 5, and return the bolt 12 from the second position h2 back to the first position h1. At this time, the bolt 12 is not restricted by the locking groove 31, and the manual locking point 112 is not locked. The window can be opened by simply pulling the window sash A. The reset spring 5 will also automatically reset after the bolt 12 is disengaged and can be reused to achieve a stable automatic window locking function for fireproof windows.

[0045] like Figures 1-14 As shown, when the automatic window locking mechanism of this utility model is used in a fireproof door and window system, the bolt 12 can move axially with the connecting rod 11 to the first position h1 or the second position h2. When the bolt 12 is in the first position h1, the bolt 12 is aligned with the locking groove 22. When the bolt 12 is in the second position h2, the bolt 12 is misaligned with the locking groove 22, and the swing block 4 abuts against the bolt 12 through the swing reset mechanism to prevent the bolt 12 from falling back to the first position h1. Thus, when the fireproof door and window system encounters a fire, the fireproof window closer D senses the fire source and automatically closes. At this time, since the door and window are in the open state, the bolt 12 will be in the first position h1, so that the automatic locking process of the automatic window locking mechanism is completed in the following steps:

[0046] S1. The fireproof window closer D drives the window sash A to move in the closing direction. The window sash A drives the connecting rod 11 of the first component 1 to move accordingly. The locking bolt 12 is held in the first position h1 under the traction of the connecting rod 11.

[0047] S2. During the closing of window sash A, the end of bolt 12 contacts bolt guide surface 32 of locking block 3. The arc-shaped structure of bolt guide surface 32 forces locking block 3 to slide along slide groove 22 to avoid it, so that locking groove 31 gradually aligns with the moving path of bolt 12.

[0048] S3. When window sash A is completely closed, locking block 3 is reset to its initial position under the action of axial reset spring 5, locking groove 31 is precisely aligned with bolt 12, and bolt 12 is inserted into locking groove 31 under the continuous pressure of connecting rod 11, completing the automatic window closing and locking function.

[0049] When the fire door or window needs to be unlocked and opened after it has automatically closed, follow these steps:

[0050] W1. Rotate the door and window handle E to 90°. The handle E drives the connecting rod 11 to move upward along the axis through the linkage part 111, causing the bolt 12 to disengage from the locking groove 31.

[0051] When the bolt 12 moves to the second position h2, its side contacts the swing guide surface 412 of the swing block 4. The bolt 12 pushes the swing block 4 to swing outward around the hinge axis 33 along the V-shaped swing guide surface 412, compressing the return torsion spring 6 to store energy. After the bolt 12 disengages from the locking groove 31, it continues to move upward and stops above the abutment surface 411 of the swing avoidance part 41. The return torsion spring 6 releases the stored energy, driving the swing block 4 to reset. The abutment surface 411 is in close contact with the side of the bolt 12, preventing it from falling back into the locking groove 31 and maintaining the second position h2. At the same time, when the bolt 12 is in h2, the manual locking point 112 on the connecting rod 11 moves upward and embeds into the B1 groove. At this time, the window cannot be opened temporarily.

[0052] W3. Rotate the handle E in the opposite direction to 0°, and the manual locking point 112 will disengage from the B1 groove. The bolt 12 will push the swing block 4 and the locking block 3 to move down along the slide groove 22 together to overcome the force of the return spring 5, and return the bolt 12 from the second position h2 back to the first position h1. At this time, the bolt 12 is not restricted by the locking groove 31, and the manual locking point 112 is not locked. The window can be opened by simply pulling the window sash A. The return spring 5 will also automatically reset after the bolt 12 disengages and can be reused to achieve a stable automatic window locking function for fireproof windows.

Claims

1. An automatic window locking mechanism for fireproof doors and windows, comprising a first component and a second component respectively installed on the window sash and window frame, characterized in that: The first component includes a connecting rod and a locking bolt disposed on the connecting rod; The second component includes a locking seat, a locking block slidably connected to the locking seat, and an axial reset mechanism for driving the locking block to reset. The locking block has a locking groove for receiving and locking the bolt. A swinging lever is hinged to one end of the locking block facing the locking groove. The locking seat is provided with a swinging reset mechanism for swinging the swinging lever under the pressure of the bolt and then resetting it. The bolt can move axially with the connecting rod, thereby allowing the bolt to enter or disengage axially from the locking groove. When the bolt disengages axially from the locking groove, the swing block is squeezed and swung by the bolt and then reset by the swing reset mechanism.

2. The automatic window locking mechanism for fireproof doors and windows according to claim 1, characterized in that: One end of the swing block is hinged to the locking block, and the other end is provided with a swing avoidance part. One end of the swing avoidance part has an abutment surface, and the end facing the locking groove is provided with at least one swing guide surface. The swing avoidance part is kept on the same axis as the locking groove through a swing reset mechanism.

3. The automatic window locking mechanism for fireproof doors and windows according to claim 2, characterized in that: The locking groove has arc-shaped or wedge-shaped bolt guide surfaces on both sides. When the bolt comes into contact with the bolt guide surface, the locking seat slides to avoid the bolt.

4. The automatic window locking mechanism for fireproof doors and windows according to claim 2, characterized in that: The swing avoidance part has two mirror-symmetrical swing guide surfaces at one end facing the locking groove, and the intersection of the swing guide surfaces rests on the axis of the locking groove.

5. The automatic window locking mechanism for fireproof doors and windows according to any one of claims 1-4, characterized in that: The locking seat has a groove for guiding the locking block, and the groove is arranged parallel to the movement direction of the connecting rod.

6. The automatic window locking mechanism for fireproof doors and windows according to claim 5, characterized in that: The locking block and the swing lever are connected by a hinge shaft. One end of the hinge shaft is connected to the locking block, and the other end passes through the slide groove and is provided with a first anti-detachment block. A connecting shaft passes between the locking block and the slide groove. One end of the connecting shaft is connected to the locking block, and the other end passes through the slide groove and is provided with a second anti-detachment block.

7. The automatic window locking mechanism for fireproof doors and windows according to claim 5, characterized in that: The axial reset mechanism includes a reset torsion spring, one end of which is connected to a locking seat and the other end is connected to a swing block or a locking block, and drives the locking block to move toward the end of the locking groove with an opening.

8. The automatic window locking mechanism for fireproof doors and windows according to claim 7, characterized in that: The locking seat has a swing groove at one end corresponding to the swing block, which is connected to the slide groove. The swing block has a reset connection part at one end for passing through the locking seat and connecting to the reset torsion spring.

9. The automatic window locking mechanism for fireproof doors and windows according to claim 8, characterized in that: The locking block and the swing block are connected by a hinge shaft. One end of the hinge shaft is connected to the locking block, and the other end passes through the slide groove and is provided with a first anti-detachment block. The diameter of the first anti-detachment block is larger than the inner diameter of the slide groove. There is a sliding narrow section between the swing groove and the slide groove. The path of the sliding narrow section is smaller than the diameter of the hinge shaft.

10. The automatic window locking mechanism for fireproof doors and windows according to claim 5, characterized in that: The swing reset mechanism includes a reset connecting part disposed on the swing block and an elastic reset member disposed on the locking seat. The locking seat has a swing groove at one end corresponding to the swing block, and the elastic reset member has a reset elastic part at at least one end corresponding to the reset connecting part. The reset connecting part passes through the swing groove and stays on one side of the reset elastic part.

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