Anti-vibration electromagnetic relay

Abstract

The utility model relates to the technical field of electromagnetic relays, and solves the problem that the relay is mistakenly triggered due to impact force. The anti-vibration electromagnetic relay comprises an inner shell and an outer shell wrapping the inner shell, an elastic piece is installed between the inner shell and the outer shell to limit the distance between the inner shell and the outer shell, a power distribution assembly is arranged in the inner shell and comprises an iron core arranged in a shell body of the inner shell, and an armature rotating on an armature column is attached to the upper end of the iron core. A coil installed on a circuit board is arranged at the lower end of the iron core, an electric shock reed is installed at the connected end of the iron core, the electric shock reed synchronously rotates along with the armature, an electric shock switch connected with an external circuit is connected to the rotating track of the electric shock reed, and a middle shaft is arranged at the end, away from the electric shock reed, of the armature and penetrates through the armature column. The end portion of the armature is connected with an extension spring connected with the circuit board. When the extension spring extends, the distance between the armature and the circuit board is compensated.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic relays, in particular to a vibration-proof electromagnetic relay. Background Art

[0002] Mechanical electromagnetic relays are widely used in electronic products. They consist of an iron core, coil, armature, and contact springs. When a certain voltage is applied across the coil, a certain current flows through it, generating an electromagnetic effect. The electromagnetic force pulls the armature toward the iron core, overcoming the pull of the return spring. This closes the armature's moving contact and the static contact (normally open contact). Electromagnetic relays are widely used in security, power, and communications, all of which have high safety requirements. For example, in the security field, relays are used to control the opening and closing of door locks. If the relay is unreliable, the door lock may accidentally open when closed, resulting in property damage.

[0003] The structure of electromagnetic relays means that when subjected to strong impact, the armature may disengage from the contacts, causing the relay output state to change. If this impact lasts for a short time, such as tens of microseconds, it may have little impact in some applications, such as an electric lock that has no time to activate within tens of microseconds. However, in some communications applications, relays are primarily used to control the on and off of signal lines. The on and off time of tens of microseconds or milliseconds can change the signal logic level, increasing the possibility of false triggering of the relay due to the impact. Utility Model Content

[0004] To address the deficiencies of the prior art, the present invention provides an anti-vibration electromagnetic relay, which alleviates the problem of false triggering of the relay due to impact force.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an anti-vibration electromagnetic relay, comprising an inner shell and an outer shell wrapped around the inner shell, an elastic member installed between the inner shell and the outer shell to limit the distance between them, and a power distribution assembly arranged in the inner shell;

[0006] The power distribution assembly includes an iron core arranged in the inner shell, an armature rotating on an armature column is attached to the upper end of the iron core, a coil mounted on a circuit board is provided at the lower end of the iron core, and an electric shock spring is installed at one end of the connection. The electric shock spring rotates synchronously with the armature and is connected to an electric shock switch connected to the external circuit on its rotation trajectory.

[0007] In one embodiment, a central axis is provided on the end of the armature away from the electric shock spring and passes through the armature column. The end of the armature is connected to a tension spring connected to the circuit board. When the tension spring is extended, the distance between the armature and the circuit board is compensated.

[0008] The electric shock switch includes a normally closed contact and a normally open contact. The normally closed contact is located above the normally open contact. The circuit line connecting the normally closed contact and the normally open contact extends on the circuit board and is connected to the welding pin.

[0009] In one embodiment, the inner shell and the outer shell bottom plate are separated by a distance through an elastic member, the elastic member includes a fixed spring installed between the inner shell and the outer shell, and an inner sleeve and an outer sleeve are connected to the fixed spring outer sleeve. The inner sleeve is connected to the fixed spring and its radius is equal to the radius of the fixed spring. The outer sleeve is arranged on the bottom of the inner shell and the outer shell bottom plate.

[0010] In one embodiment, the upper and lower ends of the fixed spring are respectively installed on the inner walls of the two outer sleeves, the outer wall of the inner sleeve is provided with front and rear symmetrical protrusions, the inner wall of the outer sleeve is provided with an inner groove adapted to the protrusions, and the inner sleeve slides up and down in the outer sleeve along the opening direction of the inner groove.

[0011] In one embodiment, a conductive plate is connected between the armature and the electric shock spring, and the circuit connected to the conductive plate extends toward the circuit board and is connected to a plurality of welding pins provided on the circuit board.

[0012] In one embodiment, the connecting position between the armature post and the armature is located on the same horizontal line as the top surface of the iron core.

[0013] Compared with the prior art, the present invention provides an anti-vibration electromagnetic relay with the following beneficial effects:

[0014] In the technical solution disclosed by the present utility model, the relay is divided into an outer shell and an inner shell, the relay components are concentrated in the inner shell, and the inner shell and the outer shell are connected by a fixed spring. When the relay is impacted by an external force, the fixed spring plays a buffering role to overcome the influence of the impact force, thereby reducing the probability of the relay being falsely triggered by the impact force.

[0015] The utility model improves the internal structure of the electromagnetic relay so that when the relay encounters strong impact vibration, the internal armature will not separate from the contact, thereby ensuring stable and reliable operation of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the power distribution assembly of the utility model;

[0019] Figure 3 This is a schematic diagram of the elastic component structure of the utility model.

[0020] In the figure: 1. Inner shell; 2. Outer shell; 3. Elastic part; 31. Fixed spring; 32. Inner sleeve; 33. Outer sleeve; 34. Bump; 35. Inner groove; 4. Power distribution assembly; 41. Iron core; 42. Armature column; 43. Armature; 44. Coil; 45. Electric shock reed; 46. Electric shock switch; 461. Normally closed contact; 462. Normally open contact; 47. Tension spring; 5. Welding pins. DETAILED DESCRIPTION

[0021] The following will describe the implementation methods of the present application in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0023] Figure 1-Figure 3 This is an embodiment of the present invention. The specific problem addressed by this embodiment is that the structure of the electromagnetic relay determines that when it is subjected to a strong impact force, the armature 43 may be separated from the contact, thereby causing the relay output state to change. If the impact force is relatively short, such as tens of microseconds, it may not have much impact in some application scenarios. For example, the electric lock does not have time to operate in tens of microseconds. However, in some communication applications, relays are mainly used to control the switching of signal lines. The on and off of tens of microseconds or tens of milliseconds will change the logic level of the signal, which will increase the probability of the relay being falsely triggered by the impact force. In response to the existing problems described above, this solution describes an anti-vibration electromagnetic relay, which divides the relay into an outer shell 2 and an inner shell 1. The relay components are concentrated in the inner shell 1. The inner shell 1 and the outer shell 2 are connected by a fixed spring 31. When the relay is impacted by an external force, the fixed spring 31 acts as a buffer to overcome the impact force, thereby improving the probability of the relay being falsely triggered by the impact force.

[0024] The present invention describes an anti-vibration electromagnetic relay based on the basic setting of an inner shell 1 and an outer shell 2. The inner shell 1 is wrapped with the outer shell 2, and an elastic part 3 is installed between the inner shell 1 and the outer shell 2 to limit the distance between them. A distribution component 4 is arranged in the inner shell 1. The elastic part 3 buffers the impact of the outer shell 2 on the inner shell 1 after being acted upon, thereby reducing the impact on the distribution component 4 in the inner shell 1, thereby reducing the probability of the distribution component 4 in the inner shell 1 of the relay being falsely triggered by the impact force.

[0025] The power distribution assembly 4 includes an iron core 41 disposed in the shell of the inner shell 1, and the upper end of the iron core 41 is fitted with an armature 43 that rotates on the armature column 42. The lower end of the iron core 41 is provided with a coil 44 mounted on a circuit board, and one end of the connection is provided with a shock spring 45. The shock spring 45 rotates synchronously with the armature 43 and is connected to an electric shock switch 46 connected to the external circuit on its rotation trajectory. The electric shock switch 46 includes a normally closed contact 461 and a normally open contact 462. The normally closed contact 461 is located at the upper end of the normally open contact 462, and is connected to the normally closed contact 461. The circuit lines of the normally closed contact 461 and the normally open contact 462 extend onto the circuit board and are connected to the solder pin 5. The end of the armature 43 facing away from the electric shock spring 45 is provided with a central axis extending through the armature column 42. The end of the armature 43 is connected to a tension spring 47 connected to the circuit board. When the tension spring 47 is extended, it compensates for the distance between the armature 43 and the circuit board. The iron core 41 senses the magnetic field generated by the coil 44. Under the magnetic attraction of the iron core 41, the armature 43 contacts the normally open contact 462. At this time, the tension spring 47 is in a stretched state.

[0026] The inner shell 1 and the bottom plate of the outer shell 2 are separated by an elastic member 3. This elastic member 3 includes a retaining spring 31 mounted between the inner shell 1 and the outer shell 2. An inner sleeve 32 and an outer sleeve 33 are connected to the outer sleeve 33 of the retaining spring 31. The inner sleeve 32 is attached to the retaining spring 31 and has a radius equal to that of the retaining spring 31. The outer sleeve 33 is mounted on the bottom of the inner shell 1 and the bottom plate of the outer shell 2. The upper and lower ends of the retaining spring 31 are respectively mounted on the inner walls of the two outer sleeves 33. The outer walls of the inner sleeve 32 are provided with symmetrical protrusions 34. The inner walls of the outer sleeve 33 are provided with inner grooves 35 that mate with the protrusions 34. The inner sleeve 32 slides up and down within the outer sleeve 33 along the direction of the inner grooves 35. A conductive plate is connected between the armature 43 and the contact spring 45. The circuitry connected to the conductive plate extends toward the circuit board and is connected to several solder pins 5 provided on the circuit board. The junction between the armature post 42 and the armature 43 is flush with the top surface of the core 41. When the circuit board and relay, as a whole, rapidly move from A1 to B1 and then come to a forced stop, the components within the relay's inner housing 1, as a whole, are subjected to an inertial force F1 = m1 * a1 (m1 is the mass of the relay's inner housing 1, and a1 is the acceleration of the relay at the moment it moves from A1 to B1). As the relay's inner housing 1 moves upward, it is subjected to a downward pull force F2 from the retaining spring 31. Because F2 acts in the opposite direction on the relay's inner housing, the acceleration of the relay's inner housing gradually decreases to zero. At this point, the armature 43 within the inner housing is subjected to an inertial force F3 = m * a3. Since a3 = 0, F3 = 0. Therefore, the armature 43 remains stationary. After the overall acceleration of the inner housing reaches zero, the downward pull of the retaining spring 31 causes the entire inner housing to move downward. Improvements to the internal structure of the electromagnetic relay prevent the armature 43 from disengaging from the contacts when subjected to strong impact or vibration, ensuring stable and reliable relay operation.

[0027] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration-proof electromagnetic relay, comprising an inner shell (1) and an outer shell (2) wrapped around the inner shell (1), characterized in that: An elastic member (3) is installed between the inner shell (1) and the outer shell (2) to limit the distance therebetween, and a power distribution assembly (4) is provided in the inner shell (1); The power distribution assembly (4) includes an iron core (41) arranged in the shell of the inner shell (1), an armature (43) rotating on an armature column (42) is attached to the upper end of the iron core (41), a coil (44) mounted on a circuit board is provided at the lower end of the iron core (41), and a contact spring (45) is installed at one end of the contact, the contact spring (45) rotates synchronously with the armature (43) and is connected to an electric shock switch (46) connected to an external circuit on its rotation trajectory.

2. The anti-vibration electromagnetic relay according to claim 1, characterized in that: The end of the armature (43) facing away from the electric shock spring (45) is provided with a central axis penetrating the armature column (42), and the end of the armature (43) is connected to a tension spring (47) connected to the circuit board. When the tension spring (47) is extended, it compensates the distance between the armature (43) and the circuit board; The electric shock switch (46) includes a normally closed contact (461) and a normally open contact (462), wherein the normally closed contact (461) is located at the upper end of the normally open contact (462), and a circuit line connecting the normally closed contact (461) and the normally open contact (462) extends on the circuit board and is connected to the welding pin (5).

3. The anti-vibration electromagnetic relay according to claim 1, characterized in that: The inner shell (1) and the bottom plate of the outer shell (2) are spaced apart by an elastic member (3). The elastic member (3) includes a fixed spring (31) installed between the inner shell (1) and the outer shell (2), an inner sleeve (32) and an outer sleeve (33) connected to the outer sleeve (33) of the fixed spring (31). The inner sleeve (32) is connected to the fixed spring (31) and its radius is equal to the radius of the fixed spring (31). The outer sleeve (33) is arranged on the bottom of the inner shell (1) and the bottom plate of the outer shell (2).

4. The anti-vibration electromagnetic relay according to claim 3, characterized in that: The upper and lower ends of the fixing spring (31) are respectively mounted on the inner walls of the two outer sleeves (33); the outer wall of the inner sleeve (32) is provided with front and rear symmetrical protrusions (34); the inner wall of the outer sleeve (33) is provided with inner grooves (35) adapted to the protrusions (34); the inner sleeve (32) slides up and down in the outer sleeve (33) along the direction in which the inner grooves (35) are opened.

5. The anti-vibration electromagnetic relay according to claim 1, characterized in that: A conductive plate is connected between the armature (43) and the electric shock spring (45), and the circuit connected to the conductor plate extends toward the circuit board and is connected to a plurality of welding pins (5) arranged on the circuit board.

6. The anti-vibration electromagnetic relay according to claim 5, characterized in that: The connecting position of the armature column (42) and the armature (43) is located on the same horizontal line as the top surface of the iron core (41).

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