Trailer lock

Abstract

A trailer lock comprises a lock body and a U-shaped lock rod, vertically-through lock rod holes are formed in the two sides of the lock body and used for allowing the U-shaped lock rod to be inserted and matched, a lock cylinder is arranged on the lock body, the lock cylinder is controlled by a matched key to rotate so as to lock or release the U-shaped lock rod, the lock body is provided with a containing cavity, and the U-shaped lock rod is arranged in the containing cavity. An alarm module is installed in the containing cavity in a positioning mode and is sealed by an upper cover, a contact switch is arranged on the upper portion of the alarm module, a rotatable coupling piece is arranged in the middle of the upper cover, a shifting piece is connected to the lower portion of the coupling piece, and the coupling piece can rotate to enable the shifting piece to trigger the contact switch. The alarm module is enabled to be in an on state; the trailer lock is simple in structure, few in parts and convenient to assemble, the coupling piece can control whether the built-in alarm module is started or not through rotation, only the coupling piece needs to be rotated to start the alarm module before the trailer is locked, and the trailer lock is more convenient to carry.

Description

Technical Field

[0001] The utility model relates to a trailer lock. Background Art

[0002] When driving a pickup truck for self-driving tourism, the pickup truck usually tows a trailer, which can carry various necessary equipment and instruments. When stopping at a certain place, the trailer will be separated from the pickup truck. How to prevent the trailer from being stolen becomes a problem that needs to be solved.

[0003] After searching, it was found that the utility model with publication number CN206071289U mentioned a trailer lock with an alarm device. The trailer lock is locked on the coupler of the trailer. If it encounters violent damage, such as prying, the alarm device will sound a buzzer alarm to scare away the thief in time and ensure the safety of property.

[0004] The trailer lock with an alarm device has a complex structure and many parts. The electronic component 7 is installed in the electronic component compartment 33 and is closed by the cover 8. A thief may dismantle the electronic component 7 with a screwdriver or other tools without triggering the alarm. That is, the thief can easily make the trailer lock with an alarm device lose its alarm function.

[0005] In addition, when the alarm device of the trailer lock with an alarm device is carried on the vehicle, it may also sound an alarm when receiving vibrations generated by a bumpy road section, which needs to be improved. Utility Model Content

[0006] In view of the shortcomings existing in the above problems, the utility model provides a trailer lock.

[0007] To achieve the above-mentioned purpose, the utility model provides a trailer lock, including a lock body and a U-shaped locking rod, wherein locking rod holes that penetrate up and down are formed on both sides of the lock body for the U-shaped locking rod to be plugged in and matched, a lock core is arranged on the lock body, and the lock core is used to control the locking and unlocking of the U-shaped locking rod, an alarm module is positioned and installed inside the lock body, and a rotatable coupling piece is also arranged outside the lock body, and the coupling piece is rotated to a first position to put the alarm module in an open state, and the coupling piece is rotated to a second position to put the alarm module in a closed state.

[0008] Furthermore, the lock body has a accommodating cavity, which is used to position and install the alarm module and is closed by an upper cover. A contact switch is provided on the upper part of the alarm module. The coupling piece is arranged through the upper cover and can rotate freely. The lower part of the coupling piece is connected to a paddle, which rotates synchronously with the coupling piece and acts with the contact switch to enable the alarm module to switch between an open state and a closed state.

[0009] Furthermore, the lock core is controlled to rotate by a matching key to lock or release the U-shaped lock rod.

[0010] Furthermore, a pin and a spring supporting the pin are provided inside the lock body, the pin is controlled to move axially by the lock core, and a bayonet is formed at one end of the U-shaped lock rod corresponding to the pin.

[0011] Furthermore, the coupling piece is used to interconnect with a coupler on the trailer, and the upper part of the coupling piece is in the shape of a ball head.

[0012] Furthermore, the lock body has an integrally formed positioning column, the upper cover has a positioning hole matching the positioning column, and the upper cover and the lock body are fixedly connected by a screw.

[0013] Furthermore, the screws and the positioning posts are distributed on both sides of the coupling member.

[0014] The beneficial effects of the utility model compared with the prior art are:

[0015] 1. The trailer lock has a simple structure, few parts and is easy to assemble;

[0016] 2. The alarm module is built into the accommodating cavity, which is closed by an upper cover. The upper cover and the lock body are connected by only one screw. When the trailer lock is locked on the trailer, the screw is hidden, making it difficult for thieves to disassemble it with a screwdriver to destroy the alarm function first. The trailer lock is more secure.

[0017] 3. The coupling can control whether the built-in alarm module is enabled by turning. You only need to turn the coupling to enable the alarm module before locking the trailer, which makes it more convenient to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of a trailer lock of the utility model;

[0019] Figure 2 This is an exploded view of a trailer lock of the utility model;

[0020] Figure 3 It is a schematic diagram of the connection between the coupling member and the paddle;

[0021] Figure 4 This is a schematic diagram of the position of the lock core, pin and spring.

[0022] In the figure: 1. U-shaped locking rod; a. bayonet; 2. upper cover; 21. positioning hole; 3. coupling piece; 4. paddle; 5. screw; 6. alarm module; 61. contact switch; 7. lock body; 71. locking rod hole; 72. accommodating cavity; 73. positioning column; 8. pin; 9. spring; 10. lock core; 11. key. DETAILED DESCRIPTION

[0023] like Figures 1 to 4 As shown, a trailer lock of an embodiment of the utility model comprises a lock body 7 and a U-shaped lock rod 1. The lock body 7 is provided with lock rod holes 71 which penetrate up and down for the U-shaped lock rod 1 to be plugged in and matched. The lock body 7 is provided with a lock core 10, which is controlled to rotate by a matching key 11 to lock or release the U-shaped lock rod 1. The lock body 7 has a receiving chamber 72, in which an alarm module 6 is positioned and installed and closed by an upper cover 2. A contact switch 61 is provided on the upper part of the alarm module 6. A rotatable coupling member 3 is provided in the middle part of the upper cover 2. A paddle 4 is connected to the lower part of the coupling member 3 (the coupling member 3 rotates synchronously with the paddle 4). The component 3 can be rotated to make the paddle 4 trigger the contact switch 61, so that the alarm module 6 is in the on state; more specifically, a pin 8 and a spring 9 supporting the pin 8 are also provided inside the lock body 7, and the pin 8 is controlled to move axially by the lock core 10, and a bayonet a is formed at one end of the U-shaped lock rod 1 corresponding to the pin 8; the coupling component 3 is used to interconnect with the coupler on the trailer, and the upper part of the coupling component 3 is in the shape of a ball head; the lock body 7 has an integrally formed positioning column 73, the upper cover 2 has a positioning hole 21 matching the positioning column 73, and the upper cover 2 and the lock body 7 are fixedly connected by a screw 5; the screw 5 and the positioning column 73 are distributed on both sides of the coupling component 3.

[0024] In addition, the lock core 10 can also adopt a multi-digit password lock. When the multi-digit password lock is unlocked, the lock core shaft can move axially freely, that is, the U-shaped lock rod 1 and the lock body 7 can be separated freely. When the multi-digit password lock is locked, the lock core shaft cannot move axially freely, that is, the U-shaped lock rod 1 and the lock body 7 cannot be separated.

[0025] The trailer lock has a simple structure, few parts and components, and is easy to assemble. The alarm module is built into the accommodating cavity, which is closed by an upper cover. The upper cover and the lock body are connected by only one screw. When the trailer lock is locked on the trailer, the screw is hidden, and it is difficult for thieves to disassemble it with a screwdriver to destroy the alarm function first. The trailer lock has higher security. The coupling piece can control whether the built-in alarm module is enabled by rotating. It is only necessary to rotate the coupling piece to enable the alarm module before locking the trailer, which is more convenient to carry.

[0026] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use;

[0027] When the trailer lock is not used on the trailer, the coupling member 3 can be rotated to make the paddle 4 and the contact switch 61 move away from each other and not contact each other, so that the alarm module 6 will not sound an alarm during carrying even if the alarm module 6 is in the off state.

[0028] Before the coupling part of the trailer lock is interconnected with the coupler on the trailer, the coupling part 3 is rotated to make the paddle 4 trigger the contact switch 61, so that the alarm module 6 is in the open state, the U-shaped locking rod 1 is inserted into the locking rod hole 71 of the lock body 7, and the key 11 is pulled out to complete the locking of the vehicle; when the vehicle is locked, the thief cannot simply remove the alarm module 6 with a screwdriver (because the screw 5 is hidden), and the anti-theft security is also higher.

[0029] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A trailer lock, comprising a lock body (7) and a U-shaped lock rod (1), wherein the lock body (7) is provided with lock rod holes (71) extending vertically and horizontally for the U-shaped lock rod (1) to be plugged in and matched with, and the lock body (7) is provided with a lock core (10), and the lock core (10) is used to control the locking and unlocking of the U-shaped lock rod (1), characterized in that: An alarm module (6) is positioned and installed inside the lock body (7), and a rotatable coupling member (3) is also arranged outside the lock body (7). When the coupling member (3) is rotated to a first position, the alarm module (6) is in an open state, and when the coupling member (3) is rotated to a second position, the alarm module (6) is in a closed state.

2. A trailer lock according to claim 1, characterized in that: The lock body (7) has a receiving cavity (72), the receiving cavity (72) is used for positioning and installing the alarm module (6) and is closed by the upper cover (2), a contact switch (61) is arranged on the alarm module (6), the coupling member (3) is arranged through the upper cover (2) and can rotate freely, the lower part of the coupling member (3) is connected to a paddle (4), the paddle (4) rotates synchronously with the coupling member (3) and acts with the contact switch (61), so that the alarm module (6) can be switched between an open state and a closed state.

3. A trailer lock according to claim 2, characterized in that: The lock core (10) is controlled to rotate by a matching key (11) to lock or release the U-shaped lock rod (1).

4. A trailer lock according to claim 3, characterized in that: A pin (8) and a spring (9) supporting the pin (8) are also provided inside the lock body (7); the pin (8) is controlled to move axially by the lock core (10); and a bayonet (a) is formed on one end of the U-shaped lock rod (1) corresponding to the pin (8).

5. A trailer lock according to claim 1, characterized in that: The coupling piece (3) is used to interconnect with a coupler on the trailer, and the upper part of the coupling piece (3) is in the shape of a ball head.

6. A trailer lock according to claim 2, characterized in that: The lock body (7) has an integrally formed positioning column (73), the upper cover (2) has a positioning hole (21) matching the positioning column (73), and the upper cover (2) and the lock body (7) are fixedly connected by a screw (5).

7. A trailer lock according to claim 6, characterized in that: The screws (5) and the positioning columns (73) are distributed on both sides of the coupling member (3).

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