Electric plunger latch mechanism of pull type house door lock

Abstract

The utility model relates to the technical field of pull type house door locks, and discloses an electric plunger latch mechanism of a pull type house door lock, which is characterized in that an integrated plunger latch guide mechanism for driving a plunger latch to move is rotationally arranged at the lower end of a fixed plate; the transverse motor smaller in size and the straight-tooth bevel gear higher in transmission efficiency, lower in noise and longer in service life are adopted for transmission, the meshing angle of straight-tooth bevel gear transmission is small, axial movement of a meshing point is small, and therefore the transmission efficiency is high; when the motor is matched with the bevel gear to drive the plunger latch to be opened and closed, a key can be easily used for unlocking or locking, and the situation that the plunger latch is accidentally and automatically opened can be prevented through the design of the guide block and the plunger latch guide groove. The positioning mode that the magnetic field sensor and the magnet are combined is adopted, the position of the spring bolt can be accurately and rapidly determined, the problem that a motor or a key cannot control a plunger latch can be completely solved through operation of the transmission and positioning system, and the service life of the door lock is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of trailer-type house door locks, in particular to an electric latch mechanism for a trailer-type house door lock. Background Art

[0002] Trailer door locks are door locks designed for trailer homes (such as trailer RVs). This type of door lock is usually strong and durable, and can adapt to various environments and usage conditions. Trailer door locks are usually made of materials such as zinc alloy, stainless steel, metal or 304 stainless steel to ensure its durability and rust resistance.

[0003] The existing trailer door locks have a complex structure, many parts and an inefficient transmission method. For example, when a clutch and connecting rod structure is used, when the door lock shakes violently during towing, the parts are prone to misalignment, and they are prone to severe wear over time, resulting in the inability to control the latch after the motor is running, or even the inability to open the door lock with a key, or in complex road conditions, the latch is accidentally opened due to shaking, so that the door will bounce open by itself, causing damage to the house and the door. In addition, since most trailer door locks on the market do not have a related positioning system, it is impossible to determine the switch state of the latch, which brings great trouble and inconvenience to users. In view of the above shortcomings, we need to propose an electric latch mechanism for a trailer door lock. Utility Model Content

[0004] The purpose of the utility model is to provide an electric latch mechanism for a trailer-type house door lock, which adopts a smaller horizontal motor and a spur bevel gear with higher transmission efficiency, lower noise and longer service life for transmission. The meshing angle of the spur bevel gear transmission is small, and the axial movement of the meshing point is small, so the transmission efficiency is high; while the motor cooperates with the bevel gear to drive the latch to open and close, the key can also be easily used to unlock or lock the door, and the design of the guide block and the latch guide groove can prevent the latch from accidentally opening by itself; a positioning method combining a magnetic field sensor and a magnet is adopted, which can accurately and quickly determine the position of the lock tongue. Through the operation of the above transmission and positioning system, the problem that the motor or key cannot control the latch can be completely avoided, and the service life of the door lock is increased, thereby giving users a better user experience to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric latch mechanism for a trailer-type house door lock, comprising a lock body, a fixing plate installed inside the lock body, a latch being integrally formed on the side of the fixing plate, and an integral latch guide mechanism for driving the latch to move being rotatably provided at the lower end of the fixing plate;

[0006] The integrated latch guide mechanism includes a switch shaft inside the latch, a guide block, a second bevel gear and a lock core shaft which are sequentially sleeved on the outer wall of the switch shaft inside the latch from top to bottom, a guide groove is provided on the fixed plate, a raised portion at one end of the guide block is movably arranged inside the guide groove, a lock core is inserted into the bottom of the lock core shaft, a first bevel gear is rotatably installed inside the lock body, and the first bevel gear is meshed with the second bevel gear.

[0007] Preferably, a motor for driving the integrated latch guide mechanism to rotate is also installed inside the lock body, and the first bevel gear is sleeved on the output shaft of the motor.

[0008] Preferably, the fixing plate is further provided with a clearance hole, and the inner switch shaft of the latch in the integrated latch guide mechanism is movably arranged inside the clearance hole.

[0009] Preferably, a lock hole for inserting a key is provided at the bottom of the lock core.

[0010] Preferably, a magnetic field sensor is installed on the lock body, a magnet is installed on the fixing plate, and the position of the magnetic field sensor and the position of the magnet are aligned.

[0011] Preferably, the top of the internal switch shaft of the latch is sleeved with an internal switch of the latch.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model adopts a smaller horizontal motor and a spur bevel gear with higher transmission efficiency, lower noise and longer life for transmission. The meshing angle of the spur bevel gear transmission is small, and the axial movement of the meshing point is small, so the transmission efficiency is high;

[0014] 2. The motor of the utility model cooperates with the bevel gear to drive the latch to open and close, and the key can be easily used to open or close the lock. The design of the guide block and the latch guide groove can prevent the latch from accidentally opening by itself.

[0015] 3. The utility model adopts a positioning method combining a magnetic field sensor and a magnet, which can accurately and quickly determine the position of the lock tongue. Through the operation of the above transmission and positioning system, the problem that the motor or key cannot control the latch can be completely avoided, thereby increasing the service life of the door lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model in which the lock bolt is in an extended state;

[0017] Figure 2 It is a structural schematic diagram of the utility model in which the lock latch is in a retracted state;

[0018] Figure 3It is an exploded view of the utility model;

[0019] Figure 4 It is a partial structural schematic diagram of the utility model.

[0020] In the figure: 1. fixing plate; 2. latch; 3. switch shaft in the latch; 4. guide block; 5. motor; 6. first bevel gear; 7. second bevel gear; 8. magnetic field sensor; 9. magnet; 10. lock core; 11. lock core shaft; 12. lock body; 13. switch in the latch; 14. guide groove. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-4 The utility model provides a technical solution: an electric latch mechanism for a trailer-type house door lock, comprising a lock body 12, a fixed plate 1 installed inside the lock body 12, a latch 2 being integrally formed on the side of the fixed plate 1, and an integrated latch guide mechanism for driving the latch 2 to move being rotatably provided at the lower end of the fixed plate 1; the extension or retraction of the latch 2 is controlled by controlling the rotation of the integrated latch guide mechanism.

[0023] The integrated latch guide mechanism includes a switch shaft 3 inside the latch, a guide block 4, a second bevel gear 7 and a lock core shaft 11 which are sequentially sleeved on the outer wall of the switch shaft 3 inside the latch from top to bottom, a guide groove 14 is provided on the fixed plate 1, a raised portion at one end of the guide block 4 is movably arranged inside the guide groove 14, a lock core 10 is inserted at the bottom of the lock core shaft 11, a first bevel gear 6 is rotatably installed inside the lock body 12, and the first bevel gear 6 is meshed with the second bevel gear 7.

[0024] When the integrated latch guide mechanism rotates, the guide block 4 rotates (ie moves inside the guide slot 14 ), thereby pushing the latch 2 to extend or retract.

[0025] The lock body 12 further includes a motor 5 for driving the integrated latch guide mechanism to rotate. The motor 5 is configured as a forward and reverse motor. The first bevel gear 6 is sleeved on the output shaft of the motor 5 .

[0026] The motor 5 drives the first bevel gear 6 to rotate, the first bevel gear 6 drives the second bevel gear 7 to rotate, the second bevel gear 7 drives the switch shaft 3 and the guide block 4 in the latch to rotate, the guide block 4 abuts against the inner wall of the guide groove 14, thereby realizing the extension or retraction of the latch 2 and preventing the latch 2 from moving by itself.

[0027] It adopts bevel gear transmission, which has higher transmission efficiency, lower noise during operation and faster unlocking speed. When passing through areas with complex ground, the transmission of latch 2 is more stable, ensuring the correct opening and closing of latch 2, preventing extreme situations of accidental self-opening, and increasing the service life of the entire product.

[0028] The fixing plate 1 is also provided with a clearance hole, and the inner switch shaft 3 of the integrated latch guide mechanism is movably arranged inside the clearance hole.

[0029] The bottom of the lock core 10 is provided with a lock hole for inserting a key. When the motor 5 drives the lock bolt 2 to move, the key can also be used to drive the lock bolt 2 to move.

[0030] A magnetic field sensor 8 is mounted on the lock body 12, and a magnet 9 is mounted on the fixing plate 1, and the position of the magnetic field sensor 8 is aligned with the position of the magnet 9. By combining the magnetic field sensor 8 and the magnet 9, the position of the latch 2 can be accurately located to determine the switch state of the latch 2, and the user can clearly understand the switch state of the latch 2.

[0031] The top of the internal switch shaft 3 of the lock latch is sleeved with an internal switch 13 .

[0032] When in use, when the motor 5 rotates, the first bevel gear 6 and the second bevel gear 7 are meshed, driving the integrated latch guide mechanism to rotate, thereby controlling the extension and retraction of the latch 2. At the same time, the key can also control the latch 2 through the integrated latch guide mechanism.

[0033] The guide block 4 moves in the guide groove 14 of the latch 2 (integrally formed with the fixing plate 1 ) to push the latch 2 to extend and retract, and can prevent the latch 2 from moving by itself when extending and retracting.

[0034] The switch shaft 3 in the latch is connected to the switch 13 in the latch, so that the switch 13 in the latch can control the switch shaft 3 in the latch to push the latch 2 to extend and retract.

[0035] The lock core shaft 11 is connected to the lock core 10, and the rotation of the lock core 10 can be controlled by a key, while driving the integrated latch guide mechanism to push the latch 2 to extend and retract. The second bevel gear 7 is meshed with the first bevel gear 6, and the first bevel gear 6 is connected to the motor 5 to transmit power to the second bevel gear 7, thereby driving the latch 2 to extend and retract.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A trailer-type house door lock electric latch mechanism, characterized in that: The invention comprises a lock body (12), a fixed plate (1) installed inside the lock body (12), a side edge of the fixed plate (1) being integrally provided with a lock latch (2), and a lower end of the fixed plate (1) being rotatably provided with an integrated lock latch guide mechanism for driving the lock latch (2) to move; The integrated latch guide mechanism comprises a latch inner switch shaft (3), a guide block (4) sleeved on the outer wall of the latch inner switch shaft (3) from top to bottom, a second bevel gear (7) and a lock core shaft (11), a guide groove (14) is provided on the fixed plate (1), a protrusion at one end of the guide block (4) is movably arranged inside the guide groove (14), a lock core (10) is inserted at the bottom of the lock core shaft (11), and a first bevel gear (6) is rotatably installed inside the lock body (12), and the first bevel gear (6) is meshed with the second bevel gear (7).

2. The electric latch mechanism for a trailer-type house door lock according to claim 1, characterized in that: A motor (5) for driving the integrated latch guide mechanism to rotate is also installed inside the lock body (12), and the first bevel gear (6) is sleeved on the output shaft of the motor (5).

3. The electric latch mechanism for a trailer-type house door lock according to claim 1, characterized in that: The fixing plate (1) is also provided with a clearance hole, and the inner switch shaft (3) of the lock latch in the integrated lock latch guide mechanism is movably arranged inside the clearance hole.

4. The electric latch mechanism for a trailer-type house door lock according to claim 1, characterized in that: The bottom of the lock core (10) is provided with a lock hole for inserting a key.

5. The electric latch mechanism for a trailer-type house door lock according to claim 1, characterized in that: A magnetic field sensor (8) is installed on the lock body (12), a magnet (9) is installed on the fixing plate (1), and the position of the magnetic field sensor (8) and the position of the magnet (9) are aligned.

6. The electric latch mechanism for a trailer-type house door lock according to claim 1, characterized in that: The top of the lock latch inner switch shaft (3) is sleeved with a lock latch inner switch (13).

Images