Easy to operate security door lock

Abstract

The application relates to the technical field of locks, in particular to an easy-to-operate safety door lock which comprises a lock box installed in a door and a buckle box used for being installed in a door frame, the lock box and the buckle box are both hollow rectangular shell structures, opposite sides of the lock box and the buckle box are both provided with through openings, side plates and lining plates are arranged at the openings of the lock box and the buckle box respectively, and the side of the lock box facing the door is also provided with an opening, and a cover plate is arranged on the opening side through bolt mounting; the door tongue is inserted into the buckle box through the driver, and the lock tongue piece is also inserted into the buckle box, double door locking is realized, criminals can be effectively prevented from damaging the door tongue to the buckle box by damaging the lock core, the safety of the door lock can be further realized through the locking unit, the door lock is not easy to be damaged, and sufficient safety guarantee is provided.

Description

Technical Field

[0001] This application relates to the field of lock technology, and in particular to an easy-to-operate security door lock. Background Technology

[0002] A door lock is a device used to lock a door to prevent others from opening it, thus protecting people's lives and property. As society continues to develop, people's requirements for door locks are gradually increasing, with theft prevention being of paramount importance.

[0003] Since door lock bolts are generally rectangular or circular and are all straight, criminals can easily break them by first damaging the mounting cover on the outside of the door, then damaging the lock cylinder and prying the bolt left and right until it is pried out of the strike plate. This method does not provide good security. Summary of the Invention

[0004] This application provides an easy-to-operate safety door lock, which adopts the following technical solution:

[0005] An easy-to-operate security door lock includes a lock box installed inside the door and a snap box for installation inside the door frame. Both the lock box and the snap box are hollow rectangular shell structures. Each lock box and the snap box has a through opening on opposite sides. The opening of the lock box and the opening of the snap box are respectively provided with a side panel and a liner. The lock box also has an opening on the side facing inwards from the door, and a cover plate is installed on this opening side by bolts.

[0006] Inside the lock box, a driver and a latch are arranged sequentially towards the snap box. Inside the latch, a latching element that cooperates with the snap box is provided, and a locking unit for controlling the latching element to lock is provided between the bottom of the latch and the latching element.

[0007] Preferably, the latch is a rectangular block structure, and a parallel guide plate is provided inside the lock box to facilitate the movement of the latch. The latch slides through the side panel and the liner in sequence to the latch box. A horizontally arranged extension strip is connected to the end of the latch away from the latch box, and the extension strip is connected to the driver. A U-shaped plate connected to the side panel is provided above the parallel guide plate, and a number of guide rollers are provided on the parallel guide plate to facilitate the movement of the latch.

[0008] Preferably, the latch includes a placement groove between the side of the latch facing the snap box and the side below it, and a hook tongue is provided in the placement groove. The parallel guide plate has a rectangular hole in the middle of the side panel. One end of the hook tongue is provided in the rectangular hole and is rotatably installed in the rectangular hole by a rotating shaft. A mating block fixed on the liner is installed in the snap box. The end of the hook tongue away from the locking hole is provided with a locking part that cooperates with the mating block.

[0009] Preferably, the locking unit includes an arc-shaped groove on the concave side of the locking part, an arc-shaped locking plate with an arc-shaped rack structure on its convex surface slidably disposed in the arc-shaped groove, and a locking hole on the mating block that is inserted and engaged with the arc-shaped locking plate; a control groove communicating with the inner sidewall of the arc-shaped groove is provided, and a locking shaft is rotatably mounted in the control groove by a torsion spring, and a rotating gear that meshes with the arc-shaped rack on the arc-shaped locking plate is mounted on the locking shaft.

[0010] Preferably, the locking unit further includes an extension portion located at one end of the rectangular hole, the extension portion having a circular groove extending through one side of the cover plate, a first take-up reel being rotatably mounted in the circular groove, and the first take-up reel being mounted on a control shaft rotatably mounted in the circular groove, the control shaft extending through the extension portion; a second take-up reel being mounted on the locking shaft, a control rope being connected between the first and second take-up reels, and the control rope being slidably disposed in guide cavities opened in the extension portion, the hook tongue, and the locking portion.

[0011] Preferably, the control shaft is provided with a rotation limiting assembly, which includes a limiting ring on the extension and arranged along the axis of the control shaft. An annular groove is formed on the inner sidewall of the limiting ring, and an inner ratchet is provided in the annular groove. A groove is formed on the outer sidewall of the control shaft located in the annular groove area, and a limiting plate that cooperates with the inner ratchet is rotatably arranged in the groove. An abutment spring is connected between the limiting plate and the sidewall of the groove. A through control hole is formed on the control shaft along its axis. A control rod is slidably arranged in the control hole, and a return spring is connected between the control hole and the control rod. A wire rope is connected to the end of the limiting plate away from the annular groove, and the wire rope slides through the control hole and passes through the center of the control hole and is connected to the inner sidewall of the control hole. The control rod is located on the side of the wire rope facing the cover plate.

[0012] Preferably, the driver includes a drive box, which is installed inside the lock box and connected to a parallel guide plate. Sliding holes are provided on both sides of the drive box to facilitate the sliding passage of the extension strip. A drive shaft is rotatably installed inside the drive box, and one end of the drive shaft passes through the drive box and the cover plate in sequence. A drive gear is installed on the drive shaft, and a parallel rack that meshes with the drive gear is connected to the end of the extension strip away from the door tongue.

[0013] Preferably, the parallel rack is provided with a plurality of limiting holes evenly distributed, and a guide ring is provided at one end of the inner cover of the drive box. A limiting rod that is inserted into and cooperates with the limiting hole is slidably disposed in the guide ring, and the end of the limiting rod away from the limiting hole slides through the cover.

[0014] Preferably, the end of the control shaft facing the cover plate passes through the cover plate, and the cover plate has an arc-shaped hole to facilitate the rotation of the control shaft with the extension.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] 1. This invention uses a driver to insert the door tongue into the strike box and also to insert the lock tongue into the strike box, achieving double locking. This effectively prevents criminals from damaging the door tongue's connection to the strike box by destroying the lock cylinder. At the same time, the locking unit further enhances the security of the door lock, making it difficult to damage and providing sufficient security.

[0017] 2. The present invention achieves the purpose of restricting the door tongue from moving out of the latch box by tightly fitting the locking part in the locking tongue component with the mating block inside the latch box. At the same time, the arc-shaped locking plate in the locking unit is inserted into the locking hole of the mating block to connect and lock the locking part with the mating block, effectively preventing the door tongue from moving out of the latch box.

[0018] 3. The present invention achieves smooth sliding of the door tongue by using a parallel guide plate in conjunction with a U-shaped plate, ensuring that the door tongue can be smoothly inserted into the snap box. At the same time, a guide roller is set on the parallel guide plate to reduce the friction of the door tongue sliding on the parallel guide plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure between the driver and the locking tongue of the present invention.

[0021] Figure 3 This is the present invention. Figure 2 A magnified view of part A.

[0022] Figure 4 This is a schematic diagram of the locking unit of the present invention. Figure 1 .

[0023] Figure 5 This is the present invention. Figure 4 A magnified view of section B.

[0024] Figure 6 This is a schematic diagram of the locking unit of the present invention. Figure 2 .

[0025] Figure 7 This is the present invention. Figure 6 A magnified view of a portion of point C.

[0026] Explanation of reference numerals in the attached drawings: 1. Lock box; 2. Snap box; 3. Side panel; 4. Liner plate; 5. Cover plate; 6. Driver; 7. Door tongue; 8. Locking tongue component; 9. Locking unit; 11. Parallel guide plate; 12. Extension bar; 13. U-shaped plate; 14. Guide roller; 81. Placement groove; 82. Hook tongue; 83. Rectangular hole; 84. Mating block; 85. Locking part; 61. Drive box; 62. Sliding hole; 63. Drive shaft; 64. Drive gear; 65. Parallel rack; 66. Limiting hole; 67. Guide ring; 68. Limiting rod; 914. Arc-shaped 91. Hole; 92. Arc-shaped groove; 93. Arc-shaped rack; 94. Arc-shaped locking plate; 95. Locking hole; 96. Control groove; 97. Locking shaft; 98. Rotating gear; 99. Extension; 910. Circular groove; 911. First reel; 912. Control shaft; 913. Second reel; 90. Control rope; 914. Rotation limiting assembly; 905. Limiting ring; 906. Annular groove; 907. Inner ratchet; 908. Groove; 909. Limiting plate; 900. Contact spring; 901. Control hole; 902. Control rod; 903. Wire rope. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0028] This application discloses an easy-to-operate security door lock, including a lock box 1 installed inside the door and a snap box 2 for installation inside the door frame. Both the lock box 1 and the snap box 2 are hollow rectangular shell structures. Both the lock box 1 and the snap box 2 have through openings on opposite sides. The openings of the lock box 1 and the snap box 2 are respectively provided with side panels 3 and lining plates 4. The side of the lock box 1 facing the inside of the door is also open, and a cover plate 5 is installed on this opening side by bolts.

[0029] Inside the lock box 1, facing the snap box 2, there are sequentially arranged a driver 6 and a door tongue 7. Inside the door tongue 7, there is a locking tongue 8 that cooperates with the snap box 2. And between the bottom of the door tongue 7 and the locking tongue 8, there is a locking unit 9 for controlling the locking tongue 8 to lock.

[0030] In practical implementation, the present invention drives the door tongue 7 to insert into the latch box 2 through the driver 6, and also drives the lock tongue 8 to insert into the latch box 2, thereby achieving double locking. This can effectively prevent criminals from damaging the insertion of the door tongue 7 into the latch box 2 by damaging the lock cylinder. At the same time, the locking unit 9 can further enhance the security of the door lock, making it difficult to be damaged and providing sufficient security.

[0031] The tongue 7 is a rectangular block structure. The lock box 1 is provided with a parallel guide plate 11 to facilitate the movement of the tongue 7. The tongue 7 slides through the side panel 3 and the liner 4 to the latch box 2. The end of the tongue 7 away from the latch box 2 is connected to a horizontally arranged extension strip 12, and the extension strip 12 is connected to the driver 6. A U-shaped plate 13 connected to the side panel 3 is provided above the parallel guide plate 11. Several guide rollers 14 are provided on the parallel guide plate 11 to facilitate the movement of the tongue 7.

[0032] In the specific implementation process, the present invention achieves smooth sliding of the tongue 7 by using the parallel guide plate 11 in conjunction with the U-shaped plate 13, ensuring that the tongue 7 can be smoothly inserted into the buckle box 2. At the same time, a guide roller 14 is provided on the parallel guide plate 11 to reduce the friction of the tongue 7 sliding on the parallel guide plate 11.

[0033] The latch 8 includes a groove 81 between the latch 7 facing the snap box 2 and the side below it, and a hook 82 is provided in the groove 81. A rectangular hole 83 is provided in the middle of the parallel guide plate 11 facing the side panel 3. One end of the hook 82 is provided in the rectangular hole 83 and is rotatably installed in the rectangular hole 83 by a pivot. A mating block 84 is installed in the snap box 2 and fixed on the liner plate 4. A locking part 85 that mates with the mating block 84 is provided at the end of the hook 82 away from the locking hole 94.

[0034] In the specific implementation process, as the door tongue 7 moves toward the latch box 2, since one end of the hook tongue 82 is installed in the rectangular hole 83 through a rotating shaft, the movement of the door tongue 7 will push the hook tongue 82 to rotate downward until the door tongue 7 is inserted into the latch box 2. At the same time, the locking part 85 of the hook tongue 82 is in close contact with the mating block 84, so that the hook tongue 82 hooks the latch box 2 and prevents the door tongue 7 from easily moving out of the latch box 2.

[0035] The locking unit 9 includes an arc-shaped groove 91 on the concave side of the locking part 85. An arc-shaped locking plate 93 with an arc-shaped rack 92 as its convex surface is slidably disposed in the arc-shaped groove 91. A locking hole 94 is provided on the mating block 84 to be inserted and mated with the arc-shaped locking plate 93. A control groove 95 communicating with the inner side wall of the arc-shaped groove 91 is provided. A locking shaft 96 is rotatably installed in the control groove 95 through a torsion spring (not shown in the figure). A rotating gear 97 that meshes with the arc-shaped rack 92 on the arc-shaped locking plate 93 is installed on the locking shaft 96.

[0036] The locking unit 9 also includes an extension 98 located at one end of the rectangular hole 83, with a circular groove 99 extending through the extension 98 toward the cover plate 5. A first reel 910 is rotatably mounted in the circular groove 99, and a control shaft 911 is rotatably mounted in the circular groove 99, with the control shaft 911 extending through the extension 98. A second reel 912 is mounted on the locking shaft 96, and a control rope 913 is connected between the first reel 910 and the second reel 912. The control rope 913 is slidably disposed in the guide cavity opened in the extension 98, the hook 82, and the locking part 85.

[0037] The end of the control shaft 911 facing the cover plate 5 passes through the cover plate 5, and the cover plate 5 is provided with an arc-shaped hole 914 to facilitate the rotation of the control shaft 911 with the extension 98.

[0038] In practical implementation, when the locking part 85 is in close contact with the mating block 84, the control shaft 911 is rotated to cause the first winding reel 910 to rotate and begin winding the control rope 913. The other end of the control rope 913 then drives the second winding reel 912 to rotate, which in turn drives the locking shaft 96 to rotate the rotating gear 97, causing the arc-shaped locking plate 93 to move towards the locking hole 94 of the mating block 84 until the arc-shaped locking plate 93 is inserted into the locking hole 94. At this point, pushing the latch 7 can effectively restrict movement. The latch 7 moves out of the latch box 2, thus preventing criminals from controlling the movement of the latch 7 by damaging the lock cylinder; when it is necessary to open, the control shaft 911 is rotated in the opposite direction, so that the locking shaft 96 rotates in the opposite direction under the action of the torsion spring and drives the locking shaft 96 to rotate. At the same time, the control rope 913 will also be rewound onto the second reel 912. Finally, under the meshing of the rotating gear 97 and the arc rack 92, the arc lock plate 93 moves out of the locking hole 94, releasing the lock between the locking part 85 and the mating block 84.

[0039] A rotation limiting assembly 90 is provided on the control shaft 911. The rotation limiting assembly 90 includes a limiting ring 901 provided on the extension 98 and along the axial direction of the control shaft 911. An annular groove 902 is formed on the inner sidewall of the limiting ring 901, and an inner ratchet 903 is provided in the annular groove 902. A groove 904 is formed on the outer sidewall of the control shaft 911 in the region of the annular groove 902, and a limiting plate 905 that cooperates with the inner ratchet 903 is rotatably disposed in the groove 904. A connection is provided between the limiting plate 905 and the sidewall of the groove 904. The control shaft 911 has a through control hole 907 along its axial direction, and a control rod 908 is slidably disposed in the control hole 907. A return spring (not shown in the figure) is connected between the control hole 907 and the control rod 908. A wire rope 909 is connected to one end of the limiting plate 905 away from the annular groove 902. The wire rope 909 slides through the control hole 907 and passes through the center of the control hole 907 and is connected to the inner wall of the control hole 907. The control rod 908 is located on the side of the wire rope 909 facing the cover plate 5.

[0040] In practical implementation, when it is necessary to lock the device by inserting the arc-shaped locking plate 93 into the locking hole 94, when the control shaft 911 is rotated, the limiting plate 905 on the control shaft 911 rotates smoothly along the inner ratchet 903 with the cooperation of the abutment spring 906. However, when the control shaft 911 rotates, the limiting plate 905 abuts against the inner ratchet 903, preventing the control shaft 911 from rotating. This ensures that the torsion spring cannot be pulled when no steering force is applied to the control shaft 911. The control rope 913 is released from the first reel 910, causing the arc-shaped locking plate 93 to move out of the locking hole 94. When it is necessary to open, the control lever 908 is pressed to push the wire rope 909, which pulls the limiting plate 905 away from the inner ratchet 903, so that the limiting plate 905 is disengaged from the inner ratchet 903, allowing the control shaft 911 to rotate smoothly in the opposite direction, which helps the arc-shaped locking plate 93 to move out of the locking hole 94.

[0041] The driver 6 includes a driver housing 61, which is installed inside the lock box 1 and connected to the parallel guide plate 11. The driver housing 61 has sliding holes 62 on both sides to facilitate the sliding passage of the extension bar 12. A drive shaft 63 is rotatably installed inside the driver housing 61, and one end of the drive shaft 63 passes through the driver housing 61 and the cover plate 5 in sequence. A drive gear 64 is installed on the drive shaft 63. The end of the extension bar 12 away from the door tongue 7 is connected to a parallel rack 65 that meshes with the drive gear 64.

[0042] Multiple limiting holes 66 are evenly provided on the parallel rack 65. A guide ring 67 is provided at one end of the inner cover plate 5 of the drive box 61. A limiting rod 68 is slidably provided in the guide ring 67 and is inserted into the limiting hole 66. The end of the limiting rod 68 away from the limiting hole 66 slides through the cover plate 5.

[0043] In the specific implementation process, the drive shaft 63 is rotated to drive the drive gear 64 to rotate, which in turn drives the gear 64 to mesh with the parallel rack 65 and drives the extension bar 12 to move. The extension bar 12 then pushes the door tongue 7 towards the latch box 2. After completion, the limit rod 68 is pushed so that the limit rod 68 is inserted into the limit hole 66 of the parallel rack 65 to limit the parallel rack 65 and prevent criminals from pushing the parallel rack 65 by damaging the lock cylinder and causing the door tongue 7 to move out of the latch box 2.

[0044] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An easy-to-operate security door lock, comprising a lock box (1) installed inside the door and a latch box (2) for installation inside the door frame, characterized in that: Both the lock box (1) and the buckle box (2) are hollow rectangular shell structures. Both the lock box (1) and the buckle box (2) have through openings on opposite sides. The lock box (1) and the buckle box (2) are respectively provided with side panels (3) and lining plates (4). The lock box (1) also has an opening on the side facing the door, and a cover plate (5) is installed on this opening side by bolts. Inside the lock box (1), in the direction of the latch box (2), there are sequentially arranged a driver (6) and a door tongue (7). Inside the door tongue (7), there is a locking tongue (8) that cooperates with the latch box (2). And between the bottom of the door tongue (7) and the locking tongue (8), there is a locking unit (9) for controlling the locking tongue (8) to lock. The tongue (7) is a rectangular block structure. The lock box (1) is provided with a parallel guide plate (11) to facilitate the movement of the tongue (7). The tongue (7) slides through the side panel (3) and the liner (4) to the buckle box (2). The end of the tongue (7) away from the buckle box (2) is connected to a horizontally arranged extension strip (12), and the extension strip (12) is connected to the driver (6). A U-shaped plate (13) connected to the side panel (3) is provided above the parallel guide plate (11). Several guide rollers (14) are provided on the parallel guide plate (11) to facilitate the movement of the tongue (7). The latch (8) includes a groove (81) between the latch (7) facing the buckle box (2) and the side below it, and a hook (82) is provided in the groove (81). The parallel guide plate (11) has a rectangular hole (83) in the middle of the side panel (3). One end of the hook (82) is provided in the rectangular hole (83) and is rotatably installed in the rectangular hole (83) by a rotating shaft. The buckle box (2) is installed with a mating block (84) fixed on the liner (4). The end of the hook (82) away from the locking hole (94) is provided with a locking part (85) that cooperates with the mating block (84). The locking unit (9) includes an arc-shaped groove (91) on the concave side of the locking part (85), an arc-shaped locking plate (93) with an arc-shaped rack (92) structure on the convex side of the arc-shaped groove (91) is slidably disposed in the arc-shaped groove (91), and a locking hole (94) is provided on the mating block (84) to be inserted and mated with the arc-shaped locking plate (93); a control groove (95) communicating with the inner side wall of the arc-shaped groove (91) is provided, and a locking shaft (96) is rotatably installed in the control groove (95) by a torsion spring, and a rotating gear (97) that meshes with the arc-shaped rack (92) on the arc-shaped locking plate (93) is installed on the locking shaft (96). The locking unit (9) further includes an extension (98) with a hook tongue (82) located at one end of a rectangular hole (83). The extension (98) has a circular groove (99) extending toward the cover plate (5). A first reel (910) is rotatably mounted in the circular groove (99). The first reel (910) is mounted on a control shaft (911) rotatably mounted in the circular groove (99). The control shaft (911) extends through the extension (98). A second reel (912) is mounted on the locking shaft (96). A control rope (913) is connected between the first reel (910) and the second reel (912). The control rope (913) is slidably disposed in a guide cavity opened in the extension (98), the hook tongue (82), and the locking part (85).

2. The easy-to-operate safety door lock according to claim 1, characterized in that: A rotation limiting assembly (90) is provided on the control shaft (911). The rotation limiting assembly (90) includes a limiting ring (901) on the extension (98) and arranged along the axis of the control shaft (911). An annular groove (902) is formed on the inner sidewall of the limiting ring (901), and an inner ratchet (903) is provided in the annular groove (902). A groove (904) is formed on the outer sidewall of the control shaft (911) in the area of ​​the annular groove (902), and a limiting plate (905) that cooperates with the inner ratchet (903) is rotatably arranged in the groove (904). The limiting plate (905) and the sidewall of the groove (904) are connected. A contact spring (906) is connected to the control shaft (911), which has a through control hole (907) along its axial direction. A control rod (908) is slidably disposed in the control hole (907), and a return spring (not shown in the figure) is connected between the control hole (907) and the control rod (908). A wire rope (909) is connected to one end of the limiting plate (905) away from the annular groove (902), and the wire rope (909) slides through the control hole (907) and passes through the center of the control hole (907) and is connected to the inner side wall of the control hole (907). The control rod (908) is located on the side of the wire rope (909) facing the cover plate (5).

3. The easy-to-operate safety door lock according to claim 1, characterized in that: The driver (6) includes a drive box (61), which is installed in the lock box (1) and connected to the parallel guide plate (11). The drive box (61) has sliding holes (62) on both sides to facilitate the sliding passage of the extension strip (12). A drive shaft (63) is rotatably installed in the drive box (61), and one end of the drive shaft (63) passes through the drive box (61) and the cover plate (5) in sequence. A drive gear (64) is installed on the drive shaft (63). The end of the extension strip (12) away from the door tongue (7) is connected to a parallel rack (65) that meshes with the drive gear (64).

4. The easy-to-operate safety door lock according to claim 3, characterized in that: The parallel rack (65) is provided with a plurality of limiting holes (66) evenly distributed. One end of the inner cover plate (5) of the drive box (61) is provided with a guide ring (67). A limiting rod (68) that is inserted and cooperates with the limiting hole (66) is slidably disposed in the guide ring (67). The end of the limiting rod (68) away from the limiting hole (66) slides through the cover plate (5).

5. The easy-to-operate safety door lock according to claim 1, characterized in that: The control shaft (911) passes through the cover plate (5) at one end facing the cover plate (5), and the cover plate (5) has an arc-shaped hole (914) that facilitates the rotation of the control shaft (911) with the extension (98).

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