Electromagnetic lock

Abstract

The utility model belongs to the technical field of electromagnets, and particularly relates to an electromagnetic lock which comprises a shell, an electromagnetic lock body and an electromagnetic lock body. The coil assembly is arranged in the containing cavity, and a static iron core and a movable iron core are arranged in the coil assembly; the shell is provided with a reset assembly used for resetting the movable iron core. Wherein a protective cover is further arranged on the shell, a surrounding cavity is formed in the protective cover, an opening is formed in the top of the protective cover, the opening is communicated with the surrounding cavity, and the surrounding cavity surrounds the end of the movable iron core; when the electromagnetic lock is powered on, the movable iron core stays in the surrounding cavity. When the electromagnetic lock is powered off, the movable iron core is reset and extends out of the opening; the design is simple and convenient to operate and extremely high in reliability, and the use efficiency and the user experience of the electromagnetic lock are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electromagnet, especially relates to an electromagnetic lock. BACKGROUND

[0002] Electromagnet is a kind of device using electric current to generate magnetic field, usually by coil and core composition.When electric current passes through wire, it will generate magnetic field around wire, using this property, when electric current passes through coil, then it will be made in coil inside uniform magnetic field.Assume that the center of coil inserts ferromagnetic material, then this ferromagnetic material will be magnetized, and it will greatly enhance magnetic field.

[0003] Electromagnet is widely used in multiple fields, including control mechanical arm and switch in industrial automation;Guide particle beam and be used for MRI in scientific research equipment;Magnetic levitation train and electromagnetic railgun in transportation;Heart pacemaker and magnetic therapy in medical equipment;Household appliances such as induction cooker and loudspeaker;Hard disk drive and electromagnetic relay in electronic equipment;Waste treatment and water treatment in environmental engineering;Electromagnetic weapon and metal detector in military and security;Science education and interactive exhibition in education and display.In addition, electromagnet is also used for hoisting, electric power transmission and machine tool fixture etc.With the progress of technology, the application field of electromagnet continues to expand.

[0004] In prior art, the driving rod above electromagnetic lock is usually designed to contact with trigger object.However, under a variety of complex installation conditions, the driving rod is susceptible to external interference, and thus faces the risk of damage. TECHNICAL PROBLEM

[0005] The utility model aims at providing an electromagnetic lock, aiming at solving the technical problem that the driving rod of electromagnetic lock in prior art is susceptible to external interference and leads to damage.

[0006] To achieve the above-mentioned purpose, the utility model embodiment provides an electromagnetic lock, which comprises:

[0007] A shell is provided with a containing cavity;

[0008] A coil assembly is arranged in the containing cavity, wherein the coil assembly is internally provided with a static iron core and a moving iron core;

[0009] A reset assembly for resetting the moving iron core is arranged on the shell;

[0010] Further, a protective cover is arranged on the shell, the protective cover is internally provided with a surrounding cavity, an opening is arranged on the top of the protective cover, the opening is communicated with the surrounding cavity, and the surrounding cavity surrounds the end portion of the moving iron core;

[0011] When the electromagnetic lock is powered on, the moving iron core stays in the surrounding cavity; when the electromagnetic lock is powered off, the moving iron core is reset and extends out of the opening.

[0012] Optionally, the protective cover is integrally formed with the shell.

[0013] Optionally, the protective cover is made of wear-resistant insulating material.

[0014] Optionally, the cross section of the surrounding cavity is in a rectangular shape.

[0015] Optionally, when the electromagnetic lock is powered on, the top end surface of the moving iron core does not exceed the top end surface of the surrounding cavity.

[0016] Optionally, the side surface of the shell is provided with a wiring terminal, the wiring terminal is electrically connected with the coil assembly, and the wiring terminal is arranged below the bottom end surface of the surrounding cavity.

[0017] Optionally, the reset assembly comprises a clamping spring and a reset spring.

[0018] The end of the clamping spring is clamped with the end of the moving iron core extending out of the coil assembly.

[0019] One end of the reset spring abuts against the top end surface of the shell, and the other end of the reset spring abuts against the end surface of the clamping spring.

[0020] Optionally, the bottom of the accommodating cavity is provided with a through hole for mounting the static iron core.

[0021] Optionally, the bottom of the accommodating cavity is further provided with an annular groove, the annular groove is arranged at the outer periphery of the through hole, and a gasket for buffering the static iron core is arranged in the annular groove.

[0022] Optionally, the shell is made of insulating material.

[0023] The above one or more technical solutions in the electromagnetic lock provided by the embodiments of the utility model have at least one of the following technical effects:

[0024] The utility model discloses an electromagnetic lock, set up a protective cover on the shell, set up a surrounding cavity in the inside of this protective cover, the effect of this surrounding cavity is that the end of moving iron core is completely surrounded, thereby effectively prevented the various interference factors in outside environment from producing the adverse effect to moving iron core and its drive rod, in this way, the damage risk of moving iron core greatly reduces, improves the stability and security of whole, in addition, when the electromagnetic lock is powered, moving iron core will stay in this surrounding cavity, thereby realizes its locking function, ensures the safety of equipment or system, and when the electromagnetic lock is powered off, moving iron core will be reset by reset component rapidly and accurately, and will extend the opening outside protective cover, thereby realizes the unlocking function, this design is not only simple to operate, and the reliability is extremely high, greatly promotes the use efficiency and user experience of electromagnetic lock. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be to the embodiment or the description of prior art needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0026] Fig. 1 The utility model provides the structure schematic diagram of electromagnetic lock for embodiment.

[0027] Fig. 2 The utility model provides another direction's structure schematic diagram of electromagnetic lock for embodiment.

[0028] Fig. 3 The utility model provides the sectional view of electromagnetic lock for embodiment.

[0029] In the drawing, various reference signs:

[0030] 10, shell, 11, containing cavity, 20, coil assembly,

[0031] 30, static iron core, 40, moving iron core, 50, protective cover,

[0032] 51, surrounding cavity, 52, opening, 60, terminal. DETAILED DESCRIPTION

[0033] The embodiment of the utility model is described in detail below, the example of the embodiment is shown in the drawing, wherein the same or similar signs indicate the same or similar elements or elements with the same or similar function throughout. The embodiment described below by referring to the drawing is exemplary, and is intended to explain the embodiment of the utility model, and cannot be understood as the limitation of the utility model.

[0034] In the description of the embodiments of the utility model, it is understood that the directions or position relations indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the utility model.

[0035] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0036] In the embodiments of the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0037] In one embodiment of the utility model, as shown in Figs. 1-3 An electromagnetic lock is provided, comprising:

[0038] A shell 10, the shell 10 is provided with a containing cavity 11;

[0039] A coil assembly 20, the coil assembly 20 is arranged in the containing cavity 11, wherein the inside of the coil assembly 20 is provided with a static iron core 30 and a moving iron core 40;

[0040] The shell 10 is provided with a reset assembly for resetting the moving iron core 40;

[0041] Wherein, the shell 10 is further provided with a protective cover 50, the inside of the protective cover 50 is provided with a surrounding cavity 51, the top of the protective cover 50 is provided with an opening 52, the opening 52 is communicated with the surrounding cavity 51, and the surrounding cavity 51 surrounds the end of the moving iron core 40;

[0042] When the electromagnetic lock is powered on, the moving iron core 40 stays in the surrounding cavity 51; when the electromagnetic lock is powered off, the moving iron core 40 is reset and extends out of the opening 52 of the protective cover 50.

[0043] Specifically, the electromagnetic lock of the utility model, through setting up a protective cover 50 on the shell 10, opening a surrounding cavity 51 in the inside of this protective cover 50, the function of this surrounding cavity 51 is to completely surround the end of moving iron core 40, thereby effectively preventing various interference factors in the external environment from producing adverse effects on moving iron core 40 and its driving rod, in this way, the damage risk of moving iron core 40 is greatly reduced, and the overall stability and safety are improved, in addition, when the electromagnetic lock is powered on, moving iron core 40 will stay in this surrounding cavity 51, thereby realizing its locking function, ensuring the safety of equipment or system, and when the electromagnetic lock is powered off, moving iron core 40 will be reset rapidly and accurately by the reset assembly, and will extend out of the opening 52 of the protective cover 50, thereby realizing the unlocking function, not only simple operation, but also extremely high reliability, greatly improving the use efficiency and user experience of the electromagnetic lock.

[0044] In another embodiment of the utility model, as shown in Figs. 1-3 The protective cover 50 is integrally formed on the shell 10. Specifically, the combination between the protective cover 50 and the shell 10 is more compact, thereby enhancing the stability and durability of the overall structure. Through this integrated design, the loosening or falling off problem between the protective cover 50 and the shell 10 can be effectively avoided, further improving the overall performance and service life of the product.

[0045] In another embodiment of the utility model, as shown in Figs. 1-3 The protective cover 50 is made of wear-resistant insulating material. Specifically, the selection of this material not only significantly improves the wear resistance of the protective cover 50, but also ensures its insulation performance, thereby further improving the safety and reliability of the electromagnetic lock. The use of wear-resistant insulating material can effectively prevent the wear of the protective cover 50 caused by long-term use or harsh environment, and avoid the electrical safety hazards caused by insufficient insulation performance.

[0046] In another embodiment of the utility model, as shown in Figs. 1-3 The cross section of the surrounding cavity 51 is in a rectangular shape. Specifically, the structure of the surrounding cavity 51 is more compact, and the accurate positioning of the moving iron core 40 is facilitated, thereby ensuring the stable operation of the electromagnetic lock. The design of the rectangular cross section not only saves space, but also enables the moving iron core 40 to move more stably during work, thereby improving the overall performance and reliability of the electromagnetic lock.

[0047] In another embodiment of the utility model, as shown in Figs. 1-3As shown, when the electromagnetic lock is powered on, the top end face of the moving iron core 40 does not exceed the top end face of the surrounding cavity 51. Specifically, it is ensured that the moving iron core 40 will not exceed the range of the protective cover 50 during operation, thereby avoiding the risk of possible mechanical damage or electrical short circuit. In this way, the moving iron core 40 can be effectively protected from external factors, ensuring the stability and safety of the electromagnetic lock in various working environments.

[0048] In another embodiment of the present utility model, as shown in Figs. 1-3 As shown, the side surface of the shell 10 is provided with a wiring terminal 60, which is electrically connected with the coil assembly 20, and the wiring terminal 60 is arranged below the bottom end face of the surrounding cavity 51. Specifically, not only the waterproof performance of the wiring terminal 60 is ensured, but also the wiring operation is more convenient and safe. By arranging the wiring terminal 60 below the bottom end face of the surrounding cavity 51, it can effectively prevent rainwater or other liquids from entering the wiring terminal 60, thereby improving the use safety and reliability of the electromagnetic lock.

[0049] In another embodiment of the present utility model, as shown in Figs. 1-3 As shown, the reset assembly includes a snap spring and a reset spring;

[0050] The end of the snap spring is clamped with the end of the moving iron core 40 that extends out of the coil assembly 20;

[0051] One end of the reset spring abuts against the top end face of the shell 10, and the other end of the reset spring abuts against the end face of the snap spring. Specifically, the design of such a reset assembly ensures that the moving iron core 40 can be quickly and accurately reset after power-off, improving the response speed and reliability of the electromagnetic lock. In this way, the problem that the moving iron core 40 cannot be reset in time after power-off can be effectively avoided, thereby improving the working efficiency and stability of the electromagnetic lock.

[0052] In another embodiment of the present utility model, as shown in Figs. 1-3 As shown, the bottom of the accommodating cavity 11 is provided with a through hole for mounting the static iron core 30. Specifically, the mounting of the static iron core 30 is more convenient, and the stability and accuracy of the static iron core 30 in the electromagnetic lock are ensured. By providing a through hole in the bottom of the accommodating cavity 11, the static iron core 30 can be conveniently fixed at a predetermined position, thereby improving the overall performance and reliability of the electromagnetic lock.

[0053] In another embodiment of the present utility model, as shown in Figs. 1-3As shown, the bottom of the accommodating cavity 11 is also provided with an annular groove, which is arranged at the outer periphery of the through hole, and a gasket for buffering the static iron core 30 is arranged in the annular groove. Specifically, not only the stability of the static iron core 30 is enhanced, but also the vibration and noise of the electromagnetic lock in the working process are reduced through the buffering effect of the gasket. By arranging the gasket in the annular groove, the vibration generated by the electromagnetic lock in the working process can be effectively absorbed, thereby reducing the noise and improving the use comfort and environmental adaptability of the electromagnetic lock.

[0054] In another embodiment of the present application, as shown in Figs. 1-3 Figs. 1-3 Specifically, the selection of such material ensures the insulation performance of the shell 10, thereby improving the overall safety of the electromagnetic lock. By using the insulating material, the electrical safety hazards caused by the conduction of the shell 10 can be effectively prevented, thereby ensuring the safety and reliability of the electromagnetic lock in various use environments.

[0055] The remaining parts of the embodiment are the same as those of the first embodiment, and the features not explained in the embodiment are explained by adopting the explanation of the first embodiment, which will not be described here.

[0056] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electromagnetic lock characterized in that, The utility model relates to a kind of electromagnetic lock, including: A shell is provided with containing cavity; Coil assembly is arranged in the containing cavity, wherein the inside of the coil assembly is provided with static iron core and moving iron core; Reset assembly for resetting the moving iron core is arranged on the shell; Wherein, the shell is further provided with protective cover, the inside of the protective cover is provided with surrounding cavity, the top of the protective cover is provided with opening, the opening is communicated with the surrounding cavity, and the surrounding cavity surrounds the end of the moving iron core; Wherein, when the electromagnetic lock is powered on, the moving iron core stays in the surrounding cavity;When the electromagnetic lock is powered off, the moving iron core is reset and extends out of the opening.

2. The electromagnetic lock of claim 1, wherein: The protective cover is integrally formed on the shell.

3. The electromagnetic lock of claim 2, wherein: The protective cover is made of wear-resistant insulating material.

4. The electromagnetic lock of claim 3, wherein: The cross section of the surrounding cavity is rectangular.

5. The electromagnetic lock of claim 4, wherein: When the electromagnetic lock is powered on, the top end surface of the moving iron core does not exceed the top end surface of the surrounding cavity.

6. The electromagnetic lock of claim 5, wherein: The side of the shell is provided with terminal, the terminal is electrically connected with the coil assembly, and the terminal is arranged below the bottom end surface of the surrounding cavity.

7. An electromagnetic lock according to any one of claims 1 to 6, characterized in that: The reset assembly includes a snap spring and a reset spring. The end of the snap spring is connected with the end of the moving iron core extending out of the coil assembly. One end of the reset spring abuts against the top end surface of the shell, and the other end of the reset spring abuts against the end surface of the snap spring.

8. The electromagnetic lock according to any one of claims 1 to 6, characterized in that: The bottom of the containing cavity is provided with through hole for installing the static iron core.

9. The electromagnetic lock of claim 8, wherein: The bottom of the containing cavity is further provided with annular groove, the annular groove is arranged on the outer periphery of the through hole, and the annular groove is provided with gasket for buffering the static iron core.

10. The electromagnetic lock according to any one of claims 1 to 6, characterized in that: The shell is made of insulating material.

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