Self-locking relay with reset function

Abstract

The utility model discloses a latching relay with a reset function, which comprises a magnet, a reset assembly and a shell, the magnet is fixed at the end part of an iron core facing an armature assembly, the reset assembly is movably arranged on the shell, and the lower end part of the reset assembly extends to one side of the armature assembly far away from the iron core. According to the utility model, the magnet is arranged on the iron core, so that the armature assembly can be attracted and fixed when the iron core and the coil are matched to magnetically attract the armature assembly, and a normally-closed connection structure (a movable contact and a static contact) on the relay is in an off state to prevent a power supply battery from being continuously in a self-discharge state; the reset assembly is arranged above the end part, far away from the movable contact, of the armature assembly, and the normally closed connection structure can be forcibly guided through a structural member, so that the product can still be smoothly opened in the state that the internal electric quantity is low or even the electric quantity is exhausted.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a self-locking relay with a reset function. Background Technology

[0002] The battery life of a smart door lock is about 5-6 months. If the door lock is not used for a long time, the battery may be depleted due to self-discharge, such as a lithium battery. When you want to use it again, you need to charge the battery before you can start the door lock normally, which will cause trouble and inconvenience.

[0003] For the reasons mentioned above, this utility model aims to provide an automatic actuator that can automatically cut off the circuit to prevent the battery from continuously discharging when the battery power is low, and can turn on the circuit to restore normal use when needed. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a self-locking relay with a reset function. When the iron core and coil are used in conjunction with the magnetic armature assembly, the armature assembly can be attracted and fixed, so that the normally closed connection structure on the relay is in an open state to avoid the power supply battery being in a state of continuous self-discharge. The normally closed connection structure can be forcibly opened through the structural components to ensure that the product can still be turned on smoothly when its internal power is low or even depleted.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A self-locking relay with a reset function includes a relay body, on which a bracket is provided and a coil, an iron core, an armature assembly, and a stationary contact are mounted. The stationary contact is in contact with the armature assembly. The coil can drive the iron core to magnetically attract the armature assembly, causing it to move away from the stationary contact to disconnect the electrical signal output. The relay also includes a magnet, a reset assembly, and a housing. The housing covers the periphery of the bracket and is detachably fixed to it. The reset assembly is movably mounted on the housing, and its lower end passes through the housing and extends to the side of the armature assembly away from the iron core. The magnet is fixed to the end of the iron core facing the armature assembly.

[0007] When the input voltage of the coil is lower than the set value, the coil can drive the iron core to magnetically attract the armature assembly and fix it on the magnet to disconnect it from the stationary contact. The reset assembly can be operated to push the armature assembly against the stationary contact to make the connection open.

[0008] As a further explanation of the above technical solution:

[0009] In the above technical solution, the end of the iron core near the armature assembly is provided with a slot, and the magnet is fitted into the slot.

[0010] In the above technical solution, the armature assembly includes an armature body and a spring: one end of the armature body is hinged to the bracket, and the other end extends to the side of the magnet and can be attracted by it; the spring is mounted on the armature body and both ends extend to the outside of the armature body, one end of the spring extends to the side of the stationary contact foot and is provided with a moving contact, the stationary contact foot is provided with a stationary contact adapted to the moving contact, and the other end of the spring extends to the side of the reset assembly.

[0011] In the above technical solution, the reset assembly includes an end cap, a pressing member, and a spring. The end cap is detachably fixed to the outer shell. The pressing member is embedded in the end cap and slidably connected to it. The spring is embedded at the end of the pressing member facing the armature assembly. One end of the spring extends to the side of the end of the spring plate away from the moving contact.

[0012] In the above technical solution, the pressing member is a cylindrical structure, with a slot and a pressure plate at the end facing the spring. The slot is adapted to the spring, and the pressure plate is located on the radial side of the spring and extends in the same direction to the side of the spring. A connecting rod adapted to the pressure plate is formed on the end of the spring away from the stationary contact foot.

[0013] In the above technical solution, the pressing component and the pressure plate are integrally formed.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: by installing a magnet on the iron core, the armature assembly can be attracted and fixed when the iron core and the coil are magnetically attracted, so that the normally closed connection structure (moving contact and stationary contact) on the relay is in the open state to avoid the power supply battery being in a state of continuous self-discharge; by setting a reset component above the end of the armature assembly away from the moving contact, the normally closed connection structure can be forcibly opened through the structural components, ensuring that the product can still be opened smoothly when its internal power is low or even depleted. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of this embodiment;

[0016] Figure 2 This is a side view of the internal structure of the outer shell in this embodiment;

[0017] Figure 3 This is an exploded structural diagram of the interior of the outer shell in this embodiment;

[0018] Figure 4 This is an exploded structural diagram of the armature assembly in this embodiment.

[0019] In the diagram: 10, bracket; 20, coil; 30, iron core; 31, slot; 40, armature assembly; 41, armature body; 42, spring; 50, stationary contact foot; 60, magnet; 70, reset assembly; 71, end cap; 72, pressing part; 73, spring; 80, outer shell; 1, moving contact; 2, stationary contact; 3, slot; 4, pressure plate; 5, connecting rod; 6, connecting foot. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] like Figure 1-3The self-locking relay with a reset function includes a relay body, a bracket 10 on which a coil 20, an iron core 30, an armature assembly 40, and a stationary contact 50 are mounted. The stationary contact 50 is in contact with the armature assembly 40. The coil 20 can drive the iron core 30 to magnetically attract the armature assembly 40, causing it to move away from the stationary contact 50 and disconnect the electrical signal output. It also includes a magnet 60, a reset assembly 70, and a housing 80. The housing 80 covers the periphery of the bracket 10 and is detachably fixed to it. The reset assembly 70 is movably mounted on the housing 80, and its lower end passes through the housing 80 and extends to the side of the armature assembly 40 away from the iron core 30. The magnet 60 is fixed to the end of the iron core 30 facing the armature assembly 40.

[0023] In this embodiment, both ends of the coil 20 are connected to a connecting pin 6, and the end of the stationary contact pin 50 is also provided with two connecting pins 6. The four connecting pins 6 are independent of each other and all extend to the outside of the outer shell 80 after passing through it.

[0024] In application, when the input voltage of coil 20 is lower than the set value, i.e., when the battery power in the smart lock is low, the control system sends a pulse signal through coil 20. This signal, in conjunction with the iron core 30, magnetically attracts the armature assembly 40, causing the armature assembly 40 to disconnect from the stationary contact 50 and thus eliminating signal output. Simultaneously, magnet 60 holds the armature assembly 40 in place, keeping it disconnected from the stationary contact 50, preventing continuous self-discharge of the battery. When the lock needs to be opened, the control reset component 70 uses a mechanism to press the armature assembly 40 against the stationary contact 50, restoring the connection and allowing the lock to open normally. The operator can then charge the battery according to the prompt signal for subsequent use.

[0025] like Figure 2-3 As shown, the end of the iron core 30 near the armature assembly 40 is provided with a slot 31, and the magnet 60 is fitted into the slot 31.

[0026] like Figure 3-4 As shown, the armature assembly 40 includes an armature body 41 and a spring 42. One end of the armature body 41 is hinged to the bracket 10, and the other end extends to the side of the magnet 60 and can be attracted by it. The spring 42 is mounted on the armature body 41 and both ends of it extend to the outside of the armature body 41. One end of the spring 42 extends to the side of the stationary contact 50 and is provided with a moving contact 1. The stationary contact 50 is provided with a stationary contact 2 that is adapted to the moving contact 1. The other end of the spring 42 extends to the side of the reset assembly 70.

[0027] like Figure 2-3As shown, the reset assembly 70 includes an end cap 71, a pressing member 72, and a spring 73. The end cap 71 is detachably fixed to the housing 80. The pressing member 72 is embedded in the end cap 71 and slidably connected to it. The end of the pressing member 72 facing the armature assembly 40 is fitted with the spring 73. One end of the spring 73 extends to the side of the end of the spring plate 42 away from the moving contact 1. In this embodiment, the pressing member 72 has a cylindrical structure. The end of the pressing member facing the spring plate 42 is provided with a slot 3 and a pressure plate 4. The slot 3 is adapted to the spring 73. The pressure plate 4 is provided on the radial side of the spring 73 and extends to the side of the spring plate 42 in the same direction. The end of the spring plate 42 away from the stationary contact 50 is formed with a connecting rod 5 adapted to the pressure plate 4. The pressing member 72 and the pressure plate 4 are integrally formed.

[0028] Understandably, the arrangement of the pressure plate 4 and the connecting rod 5 reduces the contact area between the pressing member 72 and the spring 42, allowing the spring 42 to deform with a smaller pressing force or a smaller movement distance, causing the end with the moving contact 1 to move upward and abut against the stationary contact 2. During reset, pressing the pressing member 72 causes the pressure plate 4 at its lower end to move downward and push the connecting rod 5 downward, while the other end of the spring 42 moves upward and closer to the stationary contact 50, with the moving contact 1 abutting against the stationary contact 2 to force a conductive connection.

[0029] This invention, by installing a magnet 60 on the iron core 30, can attract and fix the armature assembly 40 when the iron core 30 and the coil 20 are engaged in magnetic attraction, so that the normally closed connection structure (moving contact 1 and stationary contact 2) on the relay is in an open state to avoid the power supply battery being in a state of continuous self-discharge; by providing a reset component 70 above the end of the armature assembly 40 away from the moving contact 1, the normally closed connection structure can be forcibly opened through the structural components to ensure that the product can still be opened smoothly when its internal power is low or even depleted.

[0030] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the technical scope of this utility model.

Claims

1. A self-locking relay with a reset function, comprising a relay body, a bracket on the relay body, and a coil, an iron core, an armature assembly, and a stationary contact mounted thereon, wherein the stationary contact is in contact with the armature assembly, and the coil can drive the iron core to magnetically attract the armature assembly, causing it to move away from the stationary contact to disconnect the electrical signal output; characterized in that: It also includes a magnet, a reset assembly, and a housing. The housing covers the periphery of the bracket and is detachably fixed thereto. The reset assembly is movably mounted on the housing, and its lower end passes through the housing and extends to the side of the armature assembly away from the iron core. The magnet is fixed to the end of the iron core facing the armature assembly. When the input voltage of the coil is lower than the set value, the coil can drive the iron core to magnetically attract the armature assembly and fix it on the magnet to disconnect it from the stationary contact. The reset assembly can be operated to push the armature assembly against the stationary contact to make the connection open.

2. The self-locking relay with reset function according to claim 1, characterized in that, The iron core has a slot at the end near the armature assembly, and the magnet is fitted into the slot.

3. The self-locking relay with reset function according to claim 1, characterized in that, The armature assembly includes an armature body and a spring: one end of the armature body is hinged to the bracket, and the other end extends to the side of the magnet and can be attracted by it; the spring is mounted on the armature body and both ends extend to the outside of the armature body, one end of the spring extends to the side of the stationary contact foot and is provided with a moving contact, the stationary contact foot is provided with a stationary contact adapted to the moving contact, and the other end of the spring extends to the side of the reset assembly.

4. The self-locking relay with reset function according to claim 3, characterized in that, The reset assembly includes an end cap, a pressing member, and a spring. The end cap is detachably fixed to the housing. The pressing member is embedded in the end cap and slidably connected thereto. The spring is embedded at the end of the pressing member facing the armature assembly. One end of the spring extends to the side of the end of the reed away from the moving contact.

5. The self-locking relay with reset function according to claim 4, characterized in that, The pressing member is a cylindrical structure with a slot and a pressure plate at the end facing the spring. The slot is adapted to the spring. The pressure plate is located on the radial side of the spring and extends in the same direction to the side of the spring. A connecting rod adapted to the pressure plate is formed on the end of the spring away from the stationary contact foot.

6. The self-locking relay with reset function according to claim 5, characterized in that, The pressing component and the pressure plate are integrally formed.

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