An electromagnet structure with built-in reset

Abstract

The utility model belongs to the field of electromagnets, and in particular, relates to an electromagnet structure with built-in reset, including an outer frame formed by connecting a cover plate and a base, a coil, an armature and a reset spring. A hollow support is provided in the outer frame, and the coil is wound around the outer end of the support. An armature is provided in the support, and the support is provided with a limit table. The bottom of the armature is also connected to a pin that passes through the limit table, and the armature drives the pin under the magnetic drive of the coil to move it in one direction. One end of the reset spring is connected to the lower end of the armature, and the other end is connected to the limit table. The electromagnet structure can be used as a driving component for microwave oven door control. When the electromagnet receives an unlocking command, the coil is energized, and the magnetic field attracts the armature to move downward, thereby pushing the pin forward to open the microwave oven door. The limit table can limit the movement of the armature and thus control the distance that the pin extends. When the coil is powered off, the reset spring quickly resets the armature and the pin to the initial position to ensure that the microwave oven door is tightly closed.

Description

Technical Field

[0001] The utility model belongs to the field of electromagnets, and in particular relates to an electromagnet structure with built-in reset. Background Art

[0002] In the home appliance industry, electromagnets are a common control component widely used in various devices, such as washing machines, microwave oven doors, microwave ovens, etc. However, the traditional electromagnet structure has certain limitations in the reset method, such as the reset speed is not fast enough, the reset is not stable enough, etc. These problems have affected the user experience and performance of home appliances to a certain extent.

[0003] In order to solve the above problems, this patent proposes an external reset electromagnet structure, which realizes a fast and stable reset function through an external reset spring and specially designed connecting bosses and connecting recesses, and improves the reliability and service life of the electromagnet. Utility Model Content

[0004] The utility model aims to provide an electromagnet structure with built-in reset, aiming to solve the above problems.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an electromagnet structure with built-in reset, including an outer frame formed by connecting a cover plate and a base, a coil, an armature and a reset spring. A hollow support is provided in the outer frame, and the coil is wound around the outer end of the support. A movable armature is provided in the support, and a limit platform is also provided in the support. The bottom of the armature is also connected to a pin that passes through the limit platform, and the armature drives the pin under the magnetic drive of the coil to move in one direction. One end of the reset spring is connected to the lower end of the armature, and the other end is connected to the limit platform to reset the armature back to the initial state.

[0006] Furthermore, connecting parts are extended outward from both the upper and lower ends of the support member, and a placement groove is formed between the two connecting parts and the main body of the support member, and the coil is wound along the direction of the placement groove; the connecting part at the upper end abuts against the lower part of the cover plate; the connecting part at the lower end abuts against the upper part of the base.

[0007] Furthermore, an expansion cavity is extended upward from the upper end of the support member, and a closed opening is provided in the expansion cavity; the closed opening extends out of the cover plate.

[0008] Furthermore, the outer surface of the armature abuts against the inner side wall of the support member, and the outer surface of the armature is also provided with a first placement groove formed by cutting, the placement groove is arranged at the lower end of the armature, and one end of the return spring is connected to the first placement groove. The outer surface of the limit platform is also provided with a second placement groove formed by cutting, and the other end of the return spring is connected to the second placement groove.

[0009] Furthermore, plug-in connectors are extended forward from both ends of the cover plate, and both sides of the base are recessed at corresponding positions to form receiving portions, and the plug-in connectors extend into the receiving portions to form a snap connection.

[0010] Furthermore, mounting parts are provided at both ends of the base, and mounting holes are provided on the two mounting parts.

[0011] Further, the length of the armature plus the ejector pin is greater than the axial distance of the support member.

[0012] The above one or more technical solutions in the built-in reset electromagnet structure provided by the embodiment of the utility model have at least the following technical effects:

[0013] Taking the microwave oven door control system as an example, the electromagnet structure can be used as a door control driving component. When the electromagnet receives the unlocking command, the coil is energized, and the generated magnetic field attracts the armature to move downward, thereby pushing the ejector pin forward to open the microwave oven door. The limiter can limit the movement of the armature and control the distance the ejector pin extends. When the coil is de-energized, the reset spring quickly resets the armature and ejector pin to the initial position to ensure that the microwave oven door is tightly closed. By optimizing the reset method and structural design, the stability and reliability of the microwave oven door control system are improved, providing users with a more convenient and comfortable experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 A structural diagram of an electromagnet structure with built-in reset provided in an embodiment of the utility model.

[0016] Figure 2 A cross-sectional view of an electromagnet structure with built-in reset provided in an embodiment of the utility model.

[0017] Description of main reference numerals: 100, outer frame; 110, base; 120, cover plate; 130, coil; 140, armature; 150, return spring; 160, support member; 170, limit table; 180, ejector pin;

[0018] 200, connecting part; 210, placement groove; 220, expansion cavity; 230, closing mouth; 240, first placement groove; 250, second placement groove; 260, plug-in component; 270, receiving part; 280, installation part; 290, installation hole. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present invention in detail. Figures 1-2 , wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. Figures 1-2 The described embodiments are exemplary and are intended to be used to explain the embodiments of the present invention, but should not be construed as limiting the present invention.

[0020] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0022] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0023] In the embodiment of the utility model, this case provides an electromagnet structure with built-in reset, including an outer frame 100 formed by connecting a cover plate 120 and a base 110, a coil 130, an armature 140 and a reset spring 150. A hollow support 160 is provided in the outer frame 100, and the coil 130 is wound around the outer end of the support 160. A movable armature 140 is provided in the support 160, and a limit platform 170 is also provided in the support 160. The bottom of the armature 140 is also connected to a pin 180 that passes through the limit platform 170. Under the magnetic drive of the coil 130, the armature 140 drives the pin 180 to move in one direction. One end of the reset spring 150 is connected to the lower end of the armature 140, and the other end is connected to the limit platform 170 to reset the armature 140 back to the initial state.

[0024] Specifically, taking the microwave oven door control system as an example, the electromagnet structure can be used as a door control driving component. When the electromagnet receives an unlocking command, the coil 130 is energized, and the generated magnetic field attracts the armature 140 to move downward, thereby pushing the ejector pin 180 forward to open the microwave oven door. The limit table 170 can limit the movement of the armature 140 and thus control the distance that the ejector pin 180 extends. When the coil 130 is de-energized, the reset spring 150 quickly resets the armature 140 and the ejector pin 180 to the initial position to ensure that the microwave oven door is tightly closed. By optimizing the reset method and structural design, the stability and reliability of the microwave oven door control system are improved, providing users with a more convenient and comfortable use experience.

[0025] In another embodiment of the utility model, the upper and lower ends of the support member 160 both extend outwardly with a connection portion 200, and a placement groove 210 is formed between the two connection portions 200 and the body of the support member 160, and the coil 130 is wound along the direction of the placement groove 210; the connection portion 200 located at the upper end abuts against the lower part of the cover plate 120; the connection portion 200 located at the lower end abuts against the upper part of the base 110. The support member 160150 can be made of a material with high strength and high insulation performance to ensure its mechanical strength and electrical safety. Specifically, through the placement groove 210 formed by the connection portion 200 at the upper and lower ends of the support member 160, the coil 130 can be more stably fixed on the support member 160, avoiding the performance degradation or failure problem caused by the looseness of the coil 130 during the operation of the electromagnet. And the connection portion 200 abuts against the cover plate 120 and the base 110, further strengthening the overall stability of the outer frame 100 and reducing the vibration generated by the operation of the armature 140.

[0026] In another embodiment of the utility model, an expansion cavity 220 is further extended upward from the upper end of the support member 160, and the expansion cavity 220 is provided with a closed closure port 230; the closure port 230 extends out of the cover plate 120. Specifically, the design of the expansion cavity 220 provides additional space for the electromagnet structure, which can be used to accommodate additional components or assemblies, or to extend the distance that the armature 140 moves under the electromagnetic force, thereby increasing the functionality of the electromagnet. In addition, since the expansion cavity 220 has a closed closure port 230, it can effectively prevent dust and moisture from entering the interior of the electromagnet, thereby improving the durability and reliability of the electromagnet.

[0027] In another embodiment of the utility model, the outer surface of the armature 140 is in contact with the inner side wall of the support member 160, and the outer surface of the armature 140 is also provided with a first placement groove 240 formed by cutting, the placement groove is arranged at the lower end of the armature 140, and one end of the return spring 150 is connected to the first placement groove 240. The outer surface of the limit platform 170 is also provided with a second placement groove 250 formed by cutting, and the other end of the return spring 150 is connected to the second placement groove 250. Specifically, by providing placement grooves on the armature 140 and the limit platform 170 to fix the two ends of the return spring 150, it can be ensured that the return spring 150 always maintains a stable position and tension when the armature 140 moves, thereby ensuring that the armature 140 can accurately and quickly return to the initial position. In addition, the armature 140 needs to move up and down along the inner wall of the support member 160, and no foreign matter can be present therebetween. Therefore, a first placement groove 240 and a second placement groove 250 are provided to effectively prevent the spring from interfering with the movement of the armature 140, thereby improving the reliability and stability of the electromagnet.

[0028] In another embodiment of the utility model, the two ends of the cover plate 120 extend forwardly with plug-in parts 260, and the two sides of the base 110 are recessed at corresponding positions to form receiving parts 270, and the plug-in parts 260 extend into the receiving parts 270 to form a snap connection. Through the snap connection design of the plug-in parts 260 and the receiving parts 270, the connection between the cover plate 120 and the base 110 is more stable, and the overall stability of the electromagnet is improved.

[0029] In another embodiment of the utility model, mounting parts 280 are further provided at both ends of the base 110, and mounting holes 290 are provided on the two mounting parts 280. The mounting holes 290 can be passed through the mounting holes 290 by a locking member to lock the base 110 on the microwave oven door to provide stability.

[0030] In another embodiment of the utility model, the length of the armature 140 plus the ejector pin 180 is greater than the axial distance of the support member 160, so as to prevent the ejector pin 180 from completely extending into the support member 160, thereby avoiding the problem of damage to the internal equipment or mechanism caused by the uncontrolled position of the ejector pin 180.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnet structure with built-in reset, characterized in that: It comprises an outer frame formed by connecting a cover plate and a base, a coil, an armature and a reset spring; a hollow support is arranged in the outer frame, and the coil is wound around the outer end of the support; a movable armature is arranged in the support, and a limit platform is also arranged in the support; a pin passing through the limit platform is also connected to the bottom of the armature, and the armature drives the pin to move in one direction under the magnetic drive of the coil; one end of the reset spring is connected to the lower end of the armature, and the other end is connected to the limit platform to reset the armature back to an initial state.

2. The electromagnet structure with built-in reset according to claim 1, characterized in that: Connecting parts are extended outward from both the upper and lower ends of the support member, and a placement groove is formed between the two connecting parts and the main body of the support member, and the coil is wound along the direction of the placement groove; the connecting part located at the upper end abuts against the lower part of the cover plate; the connecting part located at the lower end abuts against the upper part of the base.

3. The electromagnet structure with built-in reset according to claim 1, characterized in that: An expansion cavity is also extended upward from the upper end of the support member, and the expansion cavity is provided with a closed opening; the closed opening extends out of the cover plate.

4. The electromagnet structure with built-in reset according to claim 1, characterized in that: The outer surface of the armature abuts against the inner wall of the support member, and the outer surface of the armature is also provided with a first placement groove formed by cutting, the placement groove is arranged at the lower end of the armature, and one end of the return spring is connected to the first placement groove.

5. The electromagnet structure with built-in reset according to claim 4, characterized in that: The outer surface of the limiting platform is also provided with a second placement groove formed by cutting, and the other end of the reset spring is connected to the second placement groove.

6. The electromagnet structure with built-in reset according to claim 1, characterized in that: Connectors are extended forward from both ends of the cover plate, and both sides of the base are recessed at corresponding positions to form receiving portions, and the connectors extend into the receiving portions to form a snap connection.

7. The electromagnet structure with built-in reset according to claim 1, characterized in that: The two ends of the base are also provided with mounting parts, and the two mounting parts are provided with mounting holes.

8. The electromagnet structure with built-in reset according to any one of claims 1 to 7, characterized in that: The length of the armature plus the ejector pin is greater than the axial distance of the support member.

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