A safe and reliable swing door lock

Abstract

The utility model discloses a safe and reliable swing door lock, including a motor, a lock tongue, a positioning plate, a compression spring, an upper contact switch and a lower contact switch. The motor is mounted on the door lock bottom plate through a motor support, a positioning plate is mounted on the top of the lock tongue, the positioning plate is mounted between the upper contact switch and the lower contact switch, the upper contact switch and the lower contact switch are both mounted on the door lock bottom plate, a compression spring is mounted on the lock tongue, the motor drives the lock tongue to lift the lock upward, the positioning plate on the lock tongue touches the upper contact switch, the control system receives a lock lifting in place signal, the motor drives the lock tongue to remain in the lock lifting in place position, otherwise the lock is dropped. The utility model improves the automation degree of the door lock, ensures the accuracy and reliability of the operation, and has the advantages of low noise, good stability and long service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevators, and in particular relates to a safe and reliable swing door lock for elevators. Background Art

[0002] Platform elevators have become a mainstream type of villa elevators, and the number of swing door systems equipped with platform elevators has increased accordingly. Due to the special structure of platform elevators, swing doors are very important to their own safety. The most important component to ensure the safety of swing doors is the door lock.

[0003] There are various structures of swing door locks on the market nowadays, but they all have problems such as loud noise and instability, which often lead to platform elevator failures and people being trapped, such as the commonly used electromagnetic door locks and motor door locks;

[0004] Electromagnetic door lock: This type of door lock evolved from the fingerprint lock for the entrance door. The advantage of this type of door lock is low noise; the disadvantage is that the electromagnetic force is small, and the force for lifting and locking the lock is small, and the lock often fails to fall into place; it may cause the elevator door to close or open accidentally when passengers enter and exit, increasing the risk of passenger injury, especially for families with children or the elderly. Due to the structure and principle of the electromagnetic door lock, its failure rate is relatively high, and it requires frequent repairs and replacements, which increases the maintenance cost of the elevator.

[0005] Motor door lock: This type of door lock uses a brushless motor to provide lifting force, and a spring to provide locking force. The advantages of this type of door lock are strong lifting and locking force, and the risk of door lock jamming is low; the disadvantage is that due to the strong lifting and locking force, the operation noise is loud, and in order to ensure that the lock can fall smoothly, the spring force is relatively large, which leads to a high motor load, easy damage, and a short service life. The complex structure and high-load operation of the motor door lock make its maintenance cost relatively high, and regular inspection and replacement of parts are required, which increases the maintenance cost of the elevator.

[0006] To sum up, whether it is an electromagnetic door lock or a motor door lock, its disadvantages may cause the elevator door to fail to close or open normally at critical moments, increasing the risk of passenger injury. The failure and poor performance of the door lock will affect the overall operation of the elevator and reduce the passenger's riding experience and service quality. Summary of the invention

[0007] The purpose of the utility model is to provide a safe and reliable swing door lock to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a safe and reliable swing door lock, comprising a motor, a lock tongue, a positioning plate, a compression spring, an upper contact switch and a lower contact switch, wherein the motor is mounted on the door lock base plate through a motor support, a positioning plate is mounted on the top of the lock tongue, the positioning plate is mounted between the upper contact switch and the lower contact switch, both the upper contact switch and the lower contact switch are mounted on the door lock base plate, a compression spring is mounted on the lock tongue, the motor drives the lock tongue to lift the lock upward, the positioning plate on the lock tongue touches the upper contact switch, the control system receives a lock-lifting-in-place signal, the motor drives the lock tongue to remain in the lock-lifting-in-place position, otherwise the lock is dropped.

[0009] Preferably, the lock tongue is composed of two symmetrically arranged left lock tongues and right lock tongues, the lower parts of the two lock tongues are connected by a fixed shaft, and the motor is connected to the fixed shaft of the lock tongue through a rotating block and a driving belt, thereby enhancing the impact resistance and anti-pry ability of the lock tongue.

[0010] Preferably, it also includes an upper guide plate and a lower guide plate, the lock tongue passes through the upper guide plate and the lower guide plate, and the compression spring is located between the upper guide plate and the lower guide plate, reducing the friction between the lock tongue and the guide plate, reducing the door lock noise, and improving the smoothness of lifting and locking.

[0011] Preferably, it also includes a triangular lock and a paddle installed on the door lock base plate, wherein the paddle is located below the positioning plate to realize external door unlocking in an emergency.

[0012] Preferably, slide blocks are installed in the lock tongue holes of the upper guide plate and the lower guide plate, and the lock tongue slides up and down in the slide blocks to ensure the smoothness of the lock tongue movement and reduce the door lock noise.

[0013] Preferably, a paddle limiting groove is provided on the upper guide plate.

[0014] Technical effects and advantages of the utility model:

[0015] 1. Through the integration of motor drive and control system, a stable force source is provided, avoiding the instability or uneven force that may be caused by manual operation, improving the accuracy and reliability of door lock action, and also facilitating remote control and automation integration.

[0016] 2. The position of the lock tongue is detected by touching the contact switch with the positioning plate. This method is accurate, reliable, and responsive, which improves the accuracy of door lock control and facilitates real-time monitoring and alarm functions of the door lock status.

[0017] 3. The symmetrical setting of the left and right lock tongues makes the door lock more balanced when subjected to external forces, improves the durability and safety of the door lock, and enhances the door lock's ability to resist impact and pry.

[0018] 4. The upper guide plate and the lower guide plate provide a stable movement trajectory for the lock tongue, and the slider further reduces the friction between the lock tongue and the guide plate, thereby improving the smoothness of the lock tongue's movement and its service life, while also reducing the noise of the door lock.

[0019] 5. The coordinated design of the triangular lock and the paddle means that when the door lock fails to open or needs to be opened manually, the triangular lock outside the door can be triangularly locked with a triangular key, so that the triangular lock paddle presses against the positioning plate and moves upward, driving the lock tongue to compress the spring to achieve the purpose of unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a rear side view of the utility model;

[0022] Figure 3 This is the original state diagram of the triangular lock;

[0023] Figure 4 This is the unlocking state diagram of the triangular lock;

[0024] Figure 5 is a structural schematic diagram of an upper guide plate;

[0025] Figure 6 It is a structural schematic diagram of the triangular lock paddle being located at the lower limit position;

[0026] Figure 7 It is a structural schematic diagram of the triangular lock paddle located at the upper limit position.

[0027] In the figure: motor-1, lock tongue-2, positioning plate-3, compression spring-4, upper contact switch-5, lower contact switch-6, upper guide plate 10, motor support-11, door lock base plate-12, lower guide plate 13, triangular lock-14, paddle-15, left lock tongue-21, right lock tongue-22, fixed shaft-23, slider-131, paddle limit slot-101. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1-Figure 4A specific implementation of a safe and reliable swing door lock of the utility model is shown: it includes a motor 1, a lock tongue 2, a positioning plate 3, a compression spring 4, an upper contact switch 5 and a lower contact switch 6. The motor 1 is mounted on a door lock bottom plate 12 through a motor support 11, a positioning plate 3 is mounted on the top of the lock tongue 2, the positioning plate 3 is installed between the upper contact switch 5 and the lower contact switch 6, the upper contact switch 5 and the lower contact switch 6 are both mounted on the door lock bottom plate 12, a compression spring 4 is mounted on the lock tongue 2, the motor 1 drives the lock tongue 2 to lift the lock upward, the positioning plate 3 on the lock tongue 2 touches the upper contact switch 5, the control system receives a lock lifting position signal, the motor 1 drives the lock tongue 2 to remain in the lock lifting position, otherwise the lock is dropped;

[0030] Furthermore, the lock tongue 2 is composed of two symmetrically arranged left lock tongues 21 and right lock tongues 22, the lower parts of the two lock tongues 2 are connected by a fixed shaft 23, and the motor 1 is connected to the fixed shaft 23 of the lock tongue 2 through a rotating block 7 and a driving belt 8;

[0031] Furthermore, it also includes an upper guide plate 10 and a lower guide plate 13, the lock tongue 2 passes through the upper guide plate 10 and the lower guide plate 13, and the compression spring 4 is located between the upper guide plate 10 and the lower guide plate 13; a slider 131 is installed in the lock tongue holes of the upper guide plate 10 and the lower guide plate 13, and the lock tongue 2 can pass through the slider 131;

[0032] Furthermore, it also includes a triangular lock 14 and a paddle 15 installed on the door lock base plate 12 , the paddle 15 is located below the positioning plate 3 , and a paddle limiting groove 101 is opened on the upper guide plate 10 .

[0033] Working principle:

[0034] 1) Lock lifting action: When the system gives the motor a lock lifting signal, the motor drives the rotary block to rotate, the rotary block pulls the drive belt, and the drive belt drives the fixed shaft, so that the spring between the fixed shaft and the upper guide block is compressed, and then drives the lock tongue to lift the lock. When the lock is in place, the positioning plate contacts the lower part of the motor bracket for positioning, and the contact contacts the upper contact switch, so that the control system receives the lock lifting in place signal, and the motor changes from the lock lifting action to the holding action, continuously overcoming the spring compression force, so that the lock tongue remains in the lock lifting in place position, and the swing door can be opened and closed normally.

[0035] 2) Locking action: When the system gives the motor a locking signal, the motor drives the rotating door to rotate in the opposite direction. At this time, the driving belt becomes loose. Since the spring between the fixed column and the upper guide block is in a compressed state and has elastic force, the positioning shaft drives the lock tongue to lock through the elastic force of the spring. The positioning plate is pressed onto the upper guide block and locked in place. At this time, the contact contacts the lower contact switch, sending a locking signal to the control system, and the motor stops running. Due to the elastic force of the spring, the lock tongue always remains in the locked state. At this time, the lock tongue extends and blocks the door leaf, making it impossible to open the swing door in the closed state.

[0036] 3) Manual unlocking in emergency: When the door lock fails to open, or the elevator fails and needs to be opened manually, the triangular lock can be turned from outside the door with a triangular key, so that the triangular lock paddle presses against the positioning plate and moves upward, driving the lock tongue to compress the spring to achieve the purpose of unlocking; when the triangular key is removed from the triangular lock position, the door lock can automatically fall due to the elastic force of the spring and return to the locked state.

[0037] Design of limited rotation angle of triangular lock paddle: Most of the existing triangular locks of elevators can rotate 360°, and in many cases it is impossible to confirm whether the triangular lock is open. In order to avoid such problems, the utility model specially designs the triangular lock so that the rotation angle of the triangular lock is less than 90°. On the premise of realizing the unlocking function, the rotation angle of the triangular lock is limited so that the operator can clearly sense whether the door lock is open. In addition, through the special structural design, the triangular lock can be automatically reset by gravity and spring elastic force, and the situation of being stuck and unable to reset after unlocking will not occur.

[0038] The original state of the triangle lock (such as Figure 3 If the protrusion at the tail of the paddle is rotated in the reverse direction, it will get stuck at the lower limit of the upper guide block (as shown in the figure). Figure 6 When the triangular lock is in the open state, the paddle presses against the positioning plate to make it contact the upper line position (as shown in the figure). Figure 7 As shown in the figure, the paddle can no longer rotate, and the end face of the paddle is designed to be an arc. At this time, the angle between the paddle and the positioning plate is only 65°. When the triangular key is removed and the paddle rotates without external force, the positioning plate will fall due to the elastic force of the spring, thereby driving the paddle to rotate counterclockwise and return to its initial position.

[0039] The applicant further declares that the present invention illustrates the implementation method and device structure of the present invention through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above methods and structures to be implemented. Those skilled in the art should understand that any improvement to the present invention, equivalent replacement of the implementation method selected by the present invention, addition of steps, selection of specific methods, etc., all fall within the scope of protection and disclosure of the present invention.

[0040] The present invention is not limited to the above-mentioned embodiments, and all methods that use structures and methods similar to the present invention to achieve the purpose of the present invention are within the protection scope of the present invention.

Claims

1. A safe and reliable swing door lock, characterized by: The invention comprises a motor (1), a lock tongue (2), a positioning plate (3), a compression spring (4), an upper contact switch (5) and a lower contact switch (6); the motor (1) is mounted on a door lock bottom plate (12) through a motor support (11); a positioning plate (3) is mounted on the top of the lock tongue (2); the positioning plate (3) is mounted between the upper contact switch (5) and the lower contact switch (6); both the upper contact switch (5) and the lower contact switch (6) are mounted on the door lock bottom plate (12); a compression spring (4) is mounted on the lock tongue (2); the motor (1) drives the lock tongue (2) to lift the lock upward; the positioning plate (3) on the lock tongue (2) touches the upper contact switch (5); the control system receives a lock lifting position signal; the motor (1) drives the lock tongue (2) to remain in the lock lifting position; otherwise, the lock is lowered.

2. A safe and reliable swing door lock according to claim 1, characterized in that: The lock tongue (2) is composed of two symmetrically arranged left lock tongues (21) and right lock tongues (22); the lower parts of the two lock tongues (2) are connected via a fixed shaft (23); and the motor (1) is connected to the fixed shaft (23) of the lock tongue (2) via a rotating block (7) and a driving belt (8).

3. A safe and reliable swing door lock according to claim 1, characterized in that: It also includes an upper guide plate (10) and a lower guide plate (13), the locking tongue (2) passes through the upper guide plate (10) and the lower guide plate (13), and the compression spring (4) is located between the upper guide plate (10) and the lower guide plate (13).

4. A safe and reliable swing door lock according to claim 1, characterized in that: It also comprises a triangular lock (14) and a paddle (15) mounted on the door lock base plate (12), wherein the paddle (15) is located below the positioning plate (3).

5. A safe and reliable swing door lock according to claim 3, characterized in that: Slide blocks (131) are installed in the lock tongue holes of the upper guide plate (10) and the lower guide plate (13), and the lock tongue (2) can pass through the slide blocks (131).

6. A safe and reliable swing door lock according to claim 3, characterized in that: A paddle limiting groove (101) is provided on the upper guide plate (10).

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