Safety door lock device

Abstract

The safety door lock device comprises a lock control unit, a main lock, an auxiliary lock and a switch device, the lock control unit, the main lock and the auxiliary lock are fixed on a door plate, the switch device controls the lock control unit to act, and the switch device comprises a sinker bar arranged on the door plate and a linkage mechanism connected with the sinker bar and the lock control unit. The linkage mechanism comprises a rocker, a first rotating shaft, a speed reducing mechanism, sliding guide rails arranged in the main lock and the auxiliary lock and the like, and the speed reducing mechanism is a bevel gear transmission mechanism. According to the utility model, the door lock can be controlled to be opened smoothly by using very small impact force, the safety is improved, the structures of the sliding guide rail and the wedge-shaped spring bolt are designed, the motion resistance of the main lock and the auxiliary lock is reduced, and the possible clamping stagnation phenomenon can be avoided.

Description

Technical Field

[0001] The utility model relates to a fixed building, in particular to a door lock design for a safety door. Background Art

[0002] The door locks of security doors generally use multiple locking points for locking. This design helps the security door to withstand greater pressure and has higher safety. The existing door locks of security doors generally use a rotary handle to open the door, or some belong to the striker type door opening method. Both structures require greater force to twist the handle or hit the striker with greater force. It is difficult to open the door with less force, which affects the use effect in emergency situations. Utility Model Content

[0003] The utility model adds a speed reducer in the link of the striker handle transmission, so that the safety door can be smoothly opened with very little force, thereby solving the technical problem of poor use effect in the prior art.

[0004] The safety door lock device designed by the present invention to achieve the above-mentioned purpose includes a lock control unit fixed on the door panel, a main lock and a secondary lock controlled by the lock control unit, and a switch device for controlling the action of the lock control unit. The switch device includes a striker arranged on the door panel and a linkage mechanism connecting the striker and the lock control unit. The linkage mechanism includes a rocker, a first rotating shaft and a speed reduction mechanism, wherein one end of the rocker is connected to one end of the striker, and the other end of the rocker is fixedly connected to the first rotating shaft, and the first rotating shaft is connected to the lock control unit through the speed reduction mechanism.

[0005] The lock control unit of the present invention includes a lock control housing and a first transmission rod, a second transmission rod, a first sector gear and a second sector gear enclosed in the lock control housing. The first transmission rod and the second transmission rod respectively control the main lock and the secondary lock. The tail end of the first transmission rod is a double-sided rack, and the tail end of the second transmission rod is a single-sided rack. The first sector gear and the second sector gear are respectively arranged on both sides of the first transmission rod and mesh with the rack at the tail end thereof. The rack part at the tail end of the second transmission rod meshes with the adjacent sector gear. The lock control unit also includes a limit bearing arranged in the lock control housing, and the limit bearing contacts the non-rack surface of the tail end of the second transmission rod.

[0006] The specific improvement of the present utility model is also that: the main lock includes a main lock shell, the main lock body is arranged in the main lock shell, and is controlled by the first transmission rod to extend or retract into the main lock shell, one end of the main lock body is a main lock tongue with a fan-shaped end, the middle of the main lock tongue is provided with an open groove, and an auxiliary lock tongue is hinged to the open groove, the head of the auxiliary lock tongue is a fan-shaped end, and the tail end is provided with a hook body, the inner surface of the main lock shell is provided with a groove, and the hook body is embedded in the groove; the inner surface of the main lock shell is provided with two protruding slide rails in parallel, and the main lock body slides on the above two slide rails; the main lock body is wedge-shaped, and its inclined surface is provided on the surface opposite to the inner surface of the main lock shell.

[0007] The present invention is further improved in that: the deceleration mechanism includes an active bevel gear arranged on the first rotating shaft and a driven bevel gear fixedly connected to the second rotating shaft, the second rotating shaft is fixedly connected to the rotating shaft of one of the first sector gear or the second sector gear, and the switching device further includes a bearing seat fixed on the door panel, and the bearing seat is sleeved on the first rotating shaft.

[0008] The utility model adopts the above structural design, can use a very small impact force to control the door lock to open smoothly, improve safety, and is designed with a wedge-shaped lock tongue structure to avoid possible jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional schematic diagram of the safety door lock device of the present utility model.

[0010] Figure 2 It is a three-dimensional schematic diagram of the lock control unit of the utility model.

[0011] Figure 3 It is a three-dimensional schematic diagram of the speed reduction mechanism of the utility model.

[0012] Figure 4 It is a three-dimensional schematic diagram of the main lock of the utility model. DETAILED DESCRIPTION

[0013] The specific embodiments of the present utility model are described with reference to the above drawings.

[0014] Depend on Figures 1 to 4It can be seen that the safety door lock device designed by the present invention includes a lock control unit 10 fixed on the door panel, a main lock 20 and a secondary lock 30 controlled by the lock control unit 10, and a switch device 40 for controlling the action of the lock control unit 10. The switch device 40 includes a striker 41 provided on the door panel and a linkage mechanism 42 connecting the striker 41 and the lock control unit 10. The linkage mechanism 42 includes a rocker 421, a first rotating shaft 422, and a speed reduction mechanism 423, wherein one end of the rocker 421 is connected to one end of the striker 41, and the other end of the rocker 421 is fixedly connected to the first rotating shaft 422, and the first rotating shaft 422 is connected to the lock control unit 10 via the speed reduction mechanism 423. The present invention provides a speed reduction mechanism 423 in the switch device, which can improve the sensitivity of the striker to control the door lock. When an external force hits the striker, even if the force is not very large, the force-adding function of the speed reduction mechanism can be sufficient to manipulate the door lock to move accurately and achieve the purpose of unlocking.

[0015] Depend on Figure 1 and Figure 2 It can be seen that the lock control unit 10 includes a lock control housing 11 and a first transmission rod 12, a second transmission rod 13, a first sector gear 14 and a second sector gear 15 enclosed in the lock control housing 11. The first transmission rod 12 and the second transmission rod 13 respectively control the main lock 20 and the secondary lock 30. The tail end of the first transmission rod 12 is a double-sided rack, and the tail end of the second transmission rod 13 is a single-sided rack. The first sector gear 14 and the second sector gear 15 are respectively arranged on both sides of the first transmission rod 12 and are meshed with the rack at the tail end thereof. The rack part at the tail end of the second transmission rod 13 is meshed with the adjacent sector gear. The lock control unit 10 also includes a limit bearing 16 arranged in the lock control housing 11, and the limit bearing 16 contacts the non-rack surface at the tail end of the second transmission rod 13. When the striker moves, the reduction mechanism drives one of the first sector gear 14 or the second sector gear 15 to rotate, and the first transmission rod 12 and the second transmission rod 13 meshed with them control the movement of the main lock and the auxiliary lock to achieve the purpose of locking or opening. The limit bearing 16 provided on the one hand limits the accuracy of the displacement direction of the first transmission rod 12 and the second transmission rod 13, and on the other hand also reduces the friction resistance between the first transmission rod 12, the second transmission rod 13 and the lock control housing 11 to ensure the smoothness of the movement. The utility model adopts the structure of sector gears, which can further reduce the volume of the lock control unit and make the structure simpler. The lock control unit 10 also includes a limit pin 17 provided in the lock control housing 11 for limiting the rotation angle of the first sector gear 14 and the second sector gear 15. The limit pin is provided to prevent the first sector gear 14 and the second sector gear 15 from having too long a stroke. When they rotate to a certain angle, they are blocked by the limit pin and stop rotating.

[0016] Depend on Figure 1 and Figure 4 It can be seen that the main lock 20 includes a main lock shell 21, a main lock body 22 is arranged in the main lock shell 21, and is controlled by the first transmission rod 12 to extend or retract into the main lock shell 21, one end of the main lock body 22 is a main lock tongue 221 with a fan-shaped end, and an open groove 222 is provided in the middle of the main lock tongue 221, and an auxiliary lock tongue 223 is hinged to the open groove 222, and the head of the auxiliary lock tongue 223 is a fan-shaped end, and the tail end is provided with a hook body 224, the inner surface of the main lock shell 21 is provided with a groove 211, and the hook body 224 is embedded in the groove 211; two protruding slide rails 23 are provided in parallel on the inner surface of the main lock shell 21, and the main lock body 22 slides on the above two slide rails 23; the main lock body 22 is wedge-shaped, and its inclined surface is provided on the surface opposite to the inner surface of the main lock shell 21. The slide rail 23 in this solution is designed to reduce friction between the main lock body 22 and the main lock housing 21, ensuring smooth movement of the lock tongue. The wedge-shaped lock tongue gradually increases the gap between the lock tongue and the keyhole as it retracts into the main lock housing 21, preventing it from getting stuck. The auxiliary lock tongue is designed so that when the door is closed, the locking plate on the door frame first contacts the auxiliary lock tongue, which then pulls the lock body inward through the hook, preventing excessive pressure on the main lock tongue and ensuring smooth movement of the lock tongue.

[0017] Depend on Figure 1 and Figure 3 As can be seen, the speed reduction mechanism 423 of the present invention includes a driving bevel gear 424 disposed on the first rotating shaft 422 and a driven bevel gear 426 fixedly connected to a second rotating shaft 425. The second rotating shaft 425 is fixedly connected to the rotating shaft of one of the first sector gear 14 or the second sector gear 15. The switch device 40 further includes a bearing seat 43 fixed to the door panel, which is mounted on the first rotating shaft 422. In this embodiment, the number of teeth on the driving bevel gear 424 is smaller than that on the driven bevel gear 426, which not only achieves the function of steering, but also reduces speed and achieves the effect of adding force.

[0018] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A safety door lock device, comprising a lock control unit (10) fixed to a door panel, a main lock (20) controlled by the lock control unit (10), a secondary lock (30), and a switch device (40) for controlling the operation of the lock control unit (10), characterized in that: The switch device (40) comprises a striker (41) arranged on the door panel and a linkage mechanism (42) connecting the striker (41) and the lock control unit (10), wherein the linkage mechanism (42) comprises a rocker (421), a first rotating shaft (422) and a speed reduction mechanism (423), wherein one end of the rocker (421) is connected to one end of the striker (41), and the other end of the rocker (421) is fixedly connected to the first rotating shaft (422), and the first rotating shaft (422) is connected to the lock control unit (10) via the speed reduction mechanism (423).

2. The safety door lock device according to claim 1, characterized in that: The lock control unit (10) includes a lock control housing (11) and a first transmission rod (12), a second transmission rod (13), a first sector gear (14) and a second sector gear (15) enclosed in the lock control housing (11). The first transmission rod (12) and the second transmission rod (13) respectively control the main lock (20) and the auxiliary lock (30). The tail end of the first transmission rod (12) is a double-sided rack, and the tail end of the second transmission rod (13) is a single-sided rack. The first sector gear (14) and the second sector gear (15) are respectively arranged on both sides of the first transmission rod (12) and meshed with the rack at the tail end thereof. The rack portion at the tail end of the second transmission rod (13) meshes with the adjacent sector gear.

3. The safety door lock device according to claim 2, characterized in that: The lock control unit (10) further comprises a limit bearing (16) arranged in the lock control housing (11), wherein the limit bearing (16) contacts the non-rack surface of the rear end of the second transmission rod (13).

4. The safety door lock device according to claim 2, characterized in that: The lock control unit (10) further comprises a limiting pin (17) disposed in the lock control housing (11) and used to limit the rotation angle of the first sector gear (14) and the second sector gear (15).

5. The safety door lock device according to any one of claims 2 to 4, characterized in that: The main lock (20) includes a main lock housing (21), a main lock body (22) is arranged in the main lock housing (21), and is controlled by the first transmission rod (12) to extend or retract into the main lock housing (21), one end of the main lock body (22) is a main lock tongue (221) with a fan-shaped end, an opening groove (222) is provided in the middle of the main lock tongue (221), an auxiliary lock tongue (223) is hinged to the opening groove (222), the head of the auxiliary lock tongue (223) is a fan-shaped end, and the tail end is provided with a hook body (224), the inner surface of the main lock housing (21) is provided with a groove (211), and the hook body (224) is embedded in the groove (211).

6. The safety door lock device according to claim 5, characterized in that: Two protruding slide rails (23) are provided in parallel on the inner surface of the main lock housing (21), and the main lock body (22) slides on the two slide rails (23).

7. The safety door lock device according to claim 5, characterized in that: The main lock body (22) is wedge-shaped, and its inclined surface is arranged on a surface opposite to the inner surface of the main lock housing (21).

8. The safety door lock device according to any one of claims 2 to 4, characterized in that: The speed reduction mechanism (423) includes a driving bevel gear (424) provided on the first rotating shaft (422) and a driven bevel gear (426) fixedly connected to a second rotating shaft (425), wherein the second rotating shaft (425) is fixedly connected to the rotating shaft of the first sector gear (14) or the second sector gear (15).

9. The safety door lock device according to any one of claims 1 to 4, characterized in that: The switch device (40) further comprises a bearing seat (43) fixed on the door panel, wherein the bearing seat (43) is sleeved on the first rotating shaft (422).

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