Safety lock for security window escape door

Abstract

This invention provides a safety lock specifically for escape doors on burglarproof windows. Its features include a lock box, a rotating shaft support, and a pull-wire mechanism. An actuating arm and a limiting plate are rotatably connected to the rotating shaft support. The actuating arm and the limiting plate abut against each other and are connected by a return spring. The pull-wire mechanism can pull the limiting plate to rotate. The actuating arm has a slot, and the lock box has a locking pin. The locking pin is engaged in the slot to achieve locking. The pull-wire mechanism pulls the limiting plate to rotate the actuating arm, causing the locking pin to disengage from the slot and unlock. This lock allows for remote control of the unlocking operation, enabling rapid opening without approaching the escape door in emergencies, facilitating quick escape and improving safety and convenience. After unlocking, the return spring automatically resets the actuating arm, restoring the slot to the unlocked state and preventing accidental relocking after the escape door is closed. It also prevents children from touching the unlock mechanism.

Description

Technical Field

[0001] This invention relates to the field of burglarproof window technology, and in particular to a special safety lock for escape doors of burglarproof windows. Background Technology

[0002] Security windows are widely used in residential buildings, office buildings, and other structures, effectively preventing outsiders from entering through the windows and providing security. However, while providing security, conventional security windows also hinder occupants from escaping through the windows in emergencies such as fires. Therefore, escape doors are typically installed on security windows and equipped with dedicated safety locks to allow for quick opening of the escape doors in emergencies.

[0003] Existing security locks for escape doors on burglar bars typically employ key-operated or manually operated locking mechanisms. These locks suffer from the following drawbacks: First, unlocking must be performed near the escape door, making remote operation impossible. In emergencies such as fires, personnel may find it difficult to approach the window, potentially delaying escape. Second, some locks have complex structures with cumbersome locking and unlocking procedures, hindering quick opening. Third, the lock's engagement status relies on manual confirmation by the operator, lacking automatic reset and lock-holding mechanisms. This leads to issues such as incomplete locking or accidental relocking after unlocking, resulting in both inadequate security and convenience to meet practical needs.

[0004] In view of this, it is necessary to improve the existing security locks for escape doors on burglar bars to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to disclose a special safety lock for escape doors on burglarproof windows. By incorporating a pull-cord mechanism, the lock can be remotely controlled for unlocking. In emergencies, it can be quickly opened without approaching the escape door, facilitating rapid escape and improving safety and convenience. During locking, the locking pin, guided by the long locking claw, quickly engages in the locking slot, ensuring a smooth and reliable locking process. During unlocking, the pull-cord mechanism pulls the limiting plate to rotate. The limiting plate abuts against the actuating arm, causing the locking slot to rotate, allowing the locking pin to quickly disengage and achieve rapid unlocking. The operation is simple and requires no auxiliary tools. The actuating arm and the limiting plate are connected... The reset spring connection ensures that the actuator arm automatically resets after unlocking, restoring the slot to the unlocked state and preventing accidental locking after the escape door closes, thus improving reliability. The metal sleeve in the pull-cord mechanism can rotate within the limiting groove of the limiting seat, allowing the handle mounting base to be installed in any position. This flexible installation adapts to different security window structures and installation environments, offering strong versatility. A protective cover over the T-shaped handle and outer sheath effectively prevents accidental opening of the safety lock due to handle contact, especially protecting children from contact and further enhancing safety.

[0006] To achieve the above objectives, this invention discloses a special safety lock for escape doors of burglarproof windows, including a lock box, a pivot support, and a pull-wire mechanism; an actuator arm and a limiting plate are rotatably connected to the pivot support, the actuator arm and the limiting plate abut against each other and are connected by a return spring, the pull-wire mechanism can pull the limiting plate to rotate, the actuator arm is provided with a slot, the lock box is provided with a locking pin, the locking pin is engaged in the slot to achieve locking, and the pull-wire mechanism pulls the limiting plate to drive the actuator arm to rotate so that the locking pin disengages from the slot to achieve unlocking.

[0007] In some embodiments, the surface of the actuator arm is formed with a groove, and the limiting plate is provided with a protrusion that abuts against the groove.

[0008] In some embodiments, the slot is defined by an actuator arm and a long pawl and a short pawl disposed on the actuator arm, the free end of the long pawl extending beyond the free end of the short pawl.

[0009] In some embodiments, the lock box has an opening for the pivot support to enter and exit, thereby enabling locking or unlocking.

[0010] In some embodiments, the pivot support has an opening located at the slot.

[0011] In some embodiments, the pull mechanism includes a flexible steel wire shaft, a protective sleeve fitted over the flexible steel wire shaft, a metal sleeve through which one end of the flexible steel wire shaft passes, a first connecting sleeve, a washer, and a conical sleeve sequentially connected to the metal sleeve, and a column head connected to one end of the flexible steel wire shaft; the rotating shaft support is provided with a limiting seat, the limiting seat is provided with a limiting groove, the metal sleeve is restricted in the limiting groove and can rotate, the washer and the conical sleeve are fitted to both sides of the limiting seat, the limiting plate is provided with a limiting post to restrict the movement of the column head, and one end of the protective sleeve is inserted into and fixed in the first connecting sleeve; the pull mechanism also includes an outer sheath through which the other end of the flexible steel wire shaft passes, a second connecting sleeve connected to the outer sheath, a handle mounting seat fixed on the outer sheath, and a T-shaped handle connected to the other end of the flexible steel wire shaft; the T-shaped handle drives the flexible steel wire shaft to perform a pulling motion in the outer sheath; the other end of the protective sleeve is inserted into and fixed in the second connecting sleeve.

[0012] In some embodiments, the handle mounting base is provided with two mounting pieces, each mounting piece having a through hole for the outer sheath to pass through, and the handle mounting base is also provided with two mounting holes.

[0013] In some embodiments, a nut and a dust cover are connected to the outer sheath, and the nut and dust cover clamp and fix a mounting piece on the handle mounting base.

[0014] In some embodiments, the limiting pile includes a first pile body and a second pile body spaced apart, the first pile body having a side opening for a flexible steel wire shaft to pass through, and the column head being restricted between the first pile body and the second pile body.

[0015] In some embodiments, a protective cover is also included, which is clipped onto the T-shaped handle and the outer sheath, and the protective cover has an arc-shaped cross-section.

[0016] The beneficial effects of this invention are:

[0017] First, by setting up a pull-wire mechanism, the safety lock can be operated remotely. In an emergency, it can be opened quickly without having to approach the escape door, facilitating the rapid escape of personnel and improving the safety and convenience of use.

[0018] Secondly, when locking, the locking pin is quickly locked into the slot under the guidance of the long locking claw, and the locking process is smooth and reliable; when unlocking, the pull cable mechanism pulls the limit plate to rotate, and the limit plate abuts against the actuator arm to drive the slot to rotate, so that the locking pin can quickly disengage from the slot, realizing fast unlocking. The operation is simple and requires no auxiliary tools.

[0019] Third, the actuator arm and the limit plate are connected by a return spring. After unlocking, the return spring can drive the actuator arm to automatically reset, so that the slot is restored to the unlocked state, which avoids accidental locking after the escape door is closed and improves the reliability of use.

[0020] Fourth, the metal sleeve in the pull mechanism can rotate in the limiting groove of the limiting seat, and the handle mounting base can be installed in any position, making the installation flexible and adaptable to different structures of burglar bars and different installation environments, with strong versatility;

[0021] Fifth, by installing a protective cover over the T-shaped handle and outer sleeve, the safety lock can be effectively prevented from being accidentally opened by touching the handle, especially to prevent children from touching it, thus further improving the safety of use. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the special safety lock for escape doors on burglarproof windows, as shown in this invention.

[0023] Figure 2 This is an internal structure diagram of the special safety lock for burglarproof window escape doors shown in this invention;

[0024] Figure 3 for Figure 2 The structural diagram of the rotating shaft support shown is shown below;

[0025] Figure 4 for Figure 2 A partial structural diagram of the draw wire mechanism shown;

[0026] Figure 5for Figure 2 The structural diagram of the limiting seat shown is shown;

[0027] Figure 6 for Figure 4 The diagram shows the structure of the handle mounting base.

[0028] Figure 7 for Figure 2 The diagram shows the structure of the protective cover.

[0029] Figure 8 This is a diagram illustrating the locking and unlocking process of the present invention. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Any equivalent substitutions or replacements in function, method, or structure made by those skilled in the art based on these embodiments are within the scope of protection of the present invention.

[0031] like Figure 1-8 The safety lock shown is specifically designed for escape doors on burglar bars. Specifically, it includes a lock housing 1, a pivot support 2, and a pull-wire mechanism 9. The lock housing 1 is welded to the escape door and is typically arranged vertically. The pull-wire mechanism 9 is fixed to the burglar bar body. The pivot support 2 has an L-shaped cross-section.

[0032] The rotating shaft support 2 is rotatably connected to an actuator arm 3 and a limiting plate 4. It also includes a fixing plate 21, and two shafts are provided between the fixing plate 21 and the rotating shaft support 2. The two ends of the shafts are fixedly connected to the fixing plate 21 and the rotating shaft support 2, respectively. The actuator arm 3 and the limiting plate 4 are respectively sleeved on the two shafts and can rotate around them.

[0033] The actuator arm 3 and the limiting plate 4 are connected by a return spring 22. The limiting plate 4 abuts against the actuator arm 3, and the slot 30 is in the unlocked state. The actuator arm 3 and the limiting plate 4 abut against each other. A groove 31 is formed on the surface of the actuator arm 3, and a protrusion 41 is provided on the limiting plate 4. The protrusion 41 abuts against the groove 31. When the pull cable mechanism 9 pulls the limiting plate 4, the protrusion 41 abuts against the groove 31, thereby driving the actuator arm 3 to rotate and unlocking. Through the "two-stage lever" force transmission path, the direct force point of the pull cable can be avoided from shifting. The structural design is relatively ingenious and can achieve the effects of precise transmission and anti-pull-out.

[0034] The actuator arm 3 is provided with a slot 30, which is defined by the actuator arm 3 and a long claw 32 and a short claw 33 provided on the actuator arm 3. The free end of the long claw 32 extends beyond the free end of the short claw 33, so that when the locking pin 11 is pushed in, it can preferentially contact the long claw 32 and slide into the slot 30, avoiding the locking pin 11 from colliding and jamming with the claw during the locking process. During locking, if Figure 8 In the case of a and b, the locking pin 11, guided by the long locking claw 32, quickly engages into the locking slot 30, ensuring a smooth and reliable locking process; when unlocking, as... Figure 8 In step c, the pull-wire mechanism 9 pulls the limiting plate 4 to rotate. The limiting plate 4 abuts against the actuator arm 3, causing the slot 30 to rotate, allowing the locking pin 11 to quickly disengage from the slot 30, achieving rapid unlocking. The operation is simple and requires no auxiliary tools. Both the rotating shaft support 2 and the fixing plate 21 are provided with openings 20, which are located at the slot 30 and do not affect the locking and unlocking movement between the slot 30 and the locking pin 11.

[0035] The lock box 1 has an opening 12 for the rotating shaft support 2 to enter and exit, thereby achieving locking or unlocking. The lock box 1 has a locking pin 11, which is engaged in the locking groove 30 to achieve locking. The bottom of the lock box 1 also has a notch 13 communicating with the opening 12, which facilitates the entry and exit of the pull wire mechanism 9 when the rotating shaft support 2 enters and exits the lock box 1, without affecting the locking and unlocking movement between the locking groove 30 and the locking pin 11.

[0036] When locking is required, push the pivot support 2 into the lock box 1. The locking pin 11 first contacts the long locking claw 32. Guided by the long locking claw 32, the locking groove 30 quickly rotates until it is fully engaged with the locking pin 11. At this time, the locking groove 30 is facing down or up. Pushing the escape door (lock box 1) outward will prevent the lock box 1 and the pivot support 2 from separating, thus achieving locking. At this time, the return spring 22 is in a stretched state. When unlocking is required, pull the pull cable mechanism 9. The limit plate 4 drives the moving arm 3 to rotate, and the position of the locking groove 30 rotates accordingly. At the same time, pushing the escape door (lock box 1) outward will immediately separate the lock box 1 and the pivot support 2, achieving quick unlocking. The return spring 22 returns to its original position, keeping the locking groove 30 in the unlocked state again, preventing the escape door from being accidentally locked again and improving reliability.

[0037] The pull mechanism 9 can pull the limiting plate 4 to rotate. The pull mechanism 9 includes a flexible steel wire shaft 6, a protective sleeve 61 sleeved on the flexible steel wire shaft 6, a metal sleeve 62 through which one end of the flexible steel wire shaft 6 passes, a first connecting sleeve 63, a washer 64, a conical sleeve 65 connected to the metal sleeve 62 in sequence, and a column head 60 connected to one end of the flexible steel wire shaft 6.

[0038] The rotating shaft support 2 is provided with a limiting seat 5, and the limiting seat 5 is provided with a limiting groove 50. The size of the limiting groove 50 is slightly larger than the size of the metal sleeve 62. The metal sleeve 62 can rotate in the limiting groove 50, realizing the flexible rotation of the pull wire mechanism 9. The handle mounting seat 8 can be fixed at any position on the anti-theft window body. The washer 64 and the conical sleeve 65 fit against both sides of the limiting seat 5, restricting the axial movement of the metal sleeve 62. The steel wire flexible shaft 6 will not jam when pulled at any angle, and the handle mounting seat 8 can be fixed at any position.

[0039] The limiting plate 4 is provided with limiting posts 42 to restrict the movement of the column head 60. The limiting posts 42 include a first post body 421 and a second post body 422 spaced apart. The first post body 421 has a side opening for the steel wire flexible shaft 6 to pass through. The column head 60 is restricted between the first post body 421 and the second post body 422. Under the restriction of the first post body 421, the metal sleeve 62 will not disengage from the limiting groove 50 but will be restricted within the limiting groove 50.

[0040] The wire pulling mechanism 9 also includes an outer sheath 7 through which the other end of the flexible steel wire shaft 6 passes, a second connecting sleeve 71 connected to the outer sheath 7, a handle mounting seat 8 fixed on the outer sheath 7, and a T-shaped handle 73 connected to the other end of the flexible steel wire shaft 6.

[0041] A metal tube 731 is connected to the T-shaped handle 73. The metal tube 731 extends into the outer sheath 7 and one end is connected to the flexible steel shaft 6. One end of the metal tube 731 is confined within the outer sheath 7. The T-shaped handle 73 drives the flexible steel shaft 6 to perform a pulling motion within the outer sheath 7. Pulling the T-shaped handle 73 causes the metal tube 731 to pull the flexible steel shaft 6. The flexible steel shaft 6 then drives the limiting plate 4 to rotate via the column head 60. The limiting plate 4 then drives the moving arm 3 to rotate, thereby unlocking the door.

[0042] By setting up the pull-wire mechanism 9, the safety lock can be operated remotely. In an emergency, it can be opened quickly without having to approach the escape door, facilitating rapid escape and improving safety and convenience.

[0043] The handle mounting base 8 is provided with two mounting pieces 81, each with a through hole 82 for the outer sheath 7 to pass through. The handle mounting base 8 also has two mounting holes 80, through which it is fixed to the burglarproof window body. In the pull cord mechanism 9, the metal sleeve 62 can rotate within the limiting groove 50 of the limiting seat 5. The handle mounting base 8 can be installed in any position, offering flexible installation and adaptability to burglarproof windows of different structures and different installation environments, demonstrating strong versatility.

[0044] A nut 74 and a dust cover 75 are screwed onto the outer sheath 7. The nut 74 and the dust cover 75 clamp and fix a mounting piece 81 on the handle mounting base 8, thus fixing the handle mounting base 8 onto the pull cable mechanism 9. The through hole 82 on the mounting piece 81, which is clamped and fixed by the nut 74 and the dust cover 75, is a D-shaped hole. The cross-section of the T-shaped handle 73 is also D-shaped. The two match each other and play a role in positioning and preventing rotation.

[0045] It also includes a protective cover 72, which is secured to the T-shaped handle 73 and the outer sleeve 7. This effectively prevents accidental opening of the safety lock due to accidental contact with the handle, especially protecting it from children and further enhancing safety. The protective cover 72 has an arc-shaped cross-section. Axial movement allows for the control of assembling and disassembling the protective cover 72.

[0046] One end of the protective sleeve 61 is inserted into and fixed inside the first connecting sleeve 63, and the other end of the protective sleeve 61 is inserted into and fixed inside the second connecting sleeve 71, thus protecting the flexible steel wire shaft 6.

[0047] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A special safety lock for escape doors on burglarproof windows, characterized in that: The device includes a lock box, a rotating shaft support, and a pull-wire mechanism. An actuator arm and a limiting plate are rotatably connected to the rotating shaft support. The actuator arm and the limiting plate abut against each other and are connected by a return spring. The pull-wire mechanism can pull the limiting plate to rotate. The actuator arm is provided with a slot, and the lock box is provided with a locking pin. The locking pin is engaged in the slot to achieve locking. The pull-wire mechanism pulls the limiting plate to drive the actuator arm to rotate, so that the locking pin disengages from the slot to achieve unlocking.

2. The special safety lock for escape doors on burglarproof windows according to claim 1, characterized in that, The surface of the actuator arm has a groove, and the limiting plate has a protrusion that abuts against the groove.

3. The special safety lock for escape doors on burglarproof windows according to claim 1, characterized in that, The slot is defined by an actuator arm and a long pawl and a short pawl disposed on the actuator arm, the free end of the long pawl extending beyond the free end of the short pawl.

4. The special safety lock for escape doors of burglarproof windows according to claim 1, characterized in that, The lock box has an opening for the rotating shaft support to enter and exit, thereby enabling locking or unlocking.

5. The special safety lock for escape doors on burglarproof windows according to claim 1, characterized in that, The rotating shaft support has an opening located at the slot.

6. The special safety lock for escape doors on burglarproof windows according to claim 1, characterized in that, The pull mechanism includes a flexible steel wire shaft, a protective sleeve fitted over the flexible steel wire shaft, a metal sleeve through which one end of the flexible steel wire shaft passes, a first connecting sleeve, a washer, and a conical sleeve sequentially connected to the metal sleeve, and a column head connected to one end of the flexible steel wire shaft. A limiting seat is provided on the rotating shaft support, and a limiting groove is provided on the limiting seat. The metal sleeve is confined in the limiting groove and can rotate. The washer and the conical sleeve are fitted to both sides of the limiting seat. A limiting post is provided on the limiting plate to restrict the movement of the column head. One end of the protective sleeve is inserted into and fixed within the first connecting sleeve. The pull mechanism also includes an outer sheath through which the other end of the flexible steel wire shaft passes, a second connecting sleeve connected to the outer sheath, a handle mounting seat fixed on the outer sheath, and a T-shaped handle connected to the other end of the flexible steel wire shaft. The T-shaped handle drives the flexible steel wire shaft to perform a pulling motion within the outer sheath. The other end of the protective sleeve is inserted into and fixed within the second connecting sleeve.

7. The safety lock for escape doors on burglarproof windows according to claim 6, characterized in that, The handle mounting base is provided with two mounting pieces, each mounting piece having a through hole for the outer sheath to pass through, and the handle mounting base is also provided with two mounting holes.

8. The special safety lock for escape doors of burglarproof windows according to claim 7, characterized in that, The outer sheath is connected to a nut and a dust cover, which clamp and fix a mounting piece on the handle mounting base.

9. The special safety lock for escape doors of burglarproof windows according to claim 6, characterized in that, The limiting pile includes a first pile body and a second pile body distributed at intervals. The first pile body is provided with a side opening for a flexible steel wire shaft to pass through. The column head is restricted between the first pile body and the second pile body.

10. The safety lock for escape doors of burglarproof windows according to claim 6, characterized in that, It also includes a protective cover, which is attached to the T-shaped handle and the outer sleeve, and the protective cover has an arc-shaped cross-section.

Images