CN218513375U

CN218513375U - Magnetic microswitch

Info

Publication number: CN218513375U
Application number: CN202222624148.5U
Authority: CN
Inventors: 蔡银间; 潘二海
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2023-02-21
Anticipated expiration: 2032-10-08

Abstract

The utility model discloses a magnetic force micro-gap switch, which comprises a shell, an electric control component and a magnetic component; the electric control assembly is arranged in the shell and comprises a first terminal, a second terminal, a metal elastic sheet and a pressing block, the first terminal and the second terminal are arranged in the shell at intervals, one end of the metal elastic sheet is fixedly connected with the first terminal, the other end of the metal elastic sheet is movably connected with the second terminal, the pressing block is movably connected with the shell, and one end of the pressing block is connected with the metal elastic sheet; the magnetic assembly comprises an outer magnet and an inner magnet which are oppositely arranged, the outer magnet is arranged outside the shell, the inner magnet is arranged in the shell, the inner magnet is connected with one end, far away from the metal elastic sheet, of the pressing block, and the outer magnet is matched with the inner magnet to enable the metal elastic sheet to be in contact with or separated from the second terminal; the magnetic microswitch is controlled in a non-contact mode, is simple and reliable in structure, and is beneficial to reducing production cost, prolonging the service life of the microswitch and widening the application range of the microswitch.

Description

Magnetic microswitch

Technical Field

The utility model relates to a micro-gap switch correlation technique field especially relates to a magnetic force micro-gap switch.

Background

The microswitch is a switch which has a minute contact interval and a quick action mechanism, performs a switching action by a specified stroke and a specified force, is covered by a shell, and has a driving rod outside.

Traditional micro-gap switch is that outer mechanical force passes through the metal shell fragment that transmission element acted on inside the shell, make its terminal fixed contact and movable contact switch on fast or break off, transmission element and metal shell fragment are direct contact promptly, need set up the hole that supplies transmission element to wear to establish on the shell when using this method to be used for the product, this hole is intake easily and is leaded to the short circuit, cause the potential safety hazard easily, and if some small miscellaneous pieces fall into can lead to the card to die the transmission element in the aperture, thereby lead to micro-gap switch unable normal use, therefore traditional direct contact's micro-gap switch has the problem that reliability and stability are lower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a magnetic force micro-gap switch, it adopts non-contact control, and reliability and high characteristics of stability to overcome exist among the prior art not enough.

In order to achieve the above object, the present invention provides the following technical solutions:

a magnetic microswitch comprises a shell, an electric control assembly and a magnetic assembly;

the electric control assembly is arranged in the shell and comprises a first terminal, a second terminal, a metal elastic sheet and a pressing block, the first terminal and the second terminal are arranged in the shell at intervals, one end of the metal elastic sheet is fixedly connected with the first terminal, the other end of the metal elastic sheet is movably connected with the second terminal, the pressing block is movably connected with the shell, and one end of the pressing block is connected with the metal elastic sheet;

the magnetic assembly comprises an outer magnet and an inner magnet which are arranged oppositely, the outer magnet is arranged outside the shell, the inner magnet is arranged in the shell, the inner magnet is connected with one end, far away from the metal elastic sheet, of the pressing block, and the outer magnet is matched with the inner magnet, so that the metal elastic sheet is contacted with or separated from the second terminal.

In one embodiment, a movable contact is arranged at one end of the metal elastic sheet far away from the first terminal, and a first fixed contact corresponding to the movable contact is arranged on the second terminal.

In one embodiment, the electric control assembly further comprises a third terminal, the third terminal and the second terminal are arranged in the shell at intervals, a second fixed contact corresponding to the movable contact is arranged on the third terminal, and the second fixed contact is opposite to the first fixed contact.

In one embodiment, the electronic control assembly further comprises a warping rod, one end of the warping rod is rotatably connected with the shell, the other end of the warping rod is connected with the inner magnet, and two ends of the pressing block are respectively connected with the warping rod and the metal elastic sheet.

In one embodiment, a rotating shaft is arranged at one end, away from the inner magnet, of the tilting rod, and a shaft hole corresponding to the rotating shaft is formed in the shell.

In one embodiment, the polarities of the sides of the outer magnet and the inner magnet which are close to each other are the same.

In one embodiment, the pressing block comprises a head part and a handle part which are connected in sequence, the diameter of the head part is larger than that of the handle part, the head part is arranged at one end close to the metal elastic sheet, and a clamping groove for sliding the handle part is formed in the shell.

In one embodiment, the housing includes a bottom cover and an upper cover, the upper cover covers the bottom cover to form an accommodating cavity, and the accommodating cavity is used for accommodating the electronic control assembly and the internal magnet.

In one embodiment, the housing further includes two connecting lugs, the two connecting lugs are respectively connected with the upper cover and the bottom cover, and through holes for fasteners to penetrate through are formed in the connecting lugs.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses a magnetic force micro-gap switch, set up the outer magnet outside the casing, with the inner magnet setting in the casing, and be connected inner magnet and briquetting, through outer magnet and the cooperation of inner magnet, realize contactless control metal shrapnel and second terminal contact or separation, moreover, the steam of external world can be prevented, foreign matters such as dust cause the influence to micro-gap switch's normal work, safety and stability have been improved.

Drawings

Fig. 1 is a schematic view of the overall structure of a magnetic microswitch according to a preferred embodiment of the invention;

FIG. 2 is a schematic view of the internal structure of the magnetic microswitch shown in FIG. 1;

FIG. 3 is an enlarged schematic view of the magnetic microswitch in FIG. 2 at the position A;

FIG. 4 is an enlarged view of the magnetic microswitch shown in FIG. 2 at B;

fig. 5 is a diagram of an application example of the magnetic microswitch in water shortage protection for controlling heating of a hot water device.

Reference is made to the accompanying drawings in which:

a magnetic microswitch 100;

the device comprises a shell 10, a bottom cover 11, an upper cover 12 and a connecting lug 13; the electronic control component 20, the first terminal 21, the second terminal 22, the first stationary contact 221, the metal elastic sheet 23, the movable contact 231, the pressing block 24, the head 241, the handle 242, the third terminal 25, the second stationary contact 251, the tilting rod 26 and the rotating shaft 261; magnetic assembly 30, outer magnet 31, inner magnet 32; a floating ball 40; a water tank 50.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When the number of an element is referred to as "a plurality," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The present invention will be described in detail with reference to embodiments shown in the drawings:

referring to fig. 1 to 4, a magnetic micro switch 100 according to a preferred embodiment of the present invention includes a housing 10, an electric control assembly 20 installed inside the housing 10, and a magnetic assembly 30 for controlling on/off of the electric control assembly 20; the magnetic microswitch 100 in the application adopts non-contact control, and has the characteristics of high reliability and stability.

As shown in fig. 1 and 2, the housing 10 includes a bottom cover 11 and an upper cover 12, and the upper cover 12 covers the bottom cover 11 to form an accommodating cavity; furthermore, the bottom cover 11 is provided with a plurality of connecting holes (not shown), the upper cover 12 is provided with a plurality of connecting columns (not shown) corresponding to the connecting holes, and the connecting columns and the connecting holes are inserted into each other to connect and fix the bottom cover 11 and the upper cover 12. The housing 10 further includes two connecting lugs 13, the two connecting lugs 13 are respectively connected to the upper cover 12 and the bottom cover 11, and the connecting lugs 13 are provided with through holes (not shown) for the fasteners to pass through, optionally, the fasteners may be screws, rivets or pins.

Referring to fig. 2 to 3, the electronic control assembly 20 is disposed in the accommodating cavity inside the housing 10, and the electronic control assembly 20 includes a first terminal 21, a second terminal 22, a metal spring 23 and a pressing block 24. A first terminal 21 and a second terminal 22 are disposed in the housing 10 at an interval, wherein the first terminal 21 is electrically connected to a positive pole of a power supply, and the second terminal 22 is electrically connected to a negative pole of the power supply. The metal elastic sheet 23 is made of conductive metal and can elastically deform under the action of external force with preset strength, one end of the metal elastic sheet 23 is fixedly connected with the first terminal 21, and the other end of the metal elastic sheet 23 is movably connected with the second terminal 22; further, a movable contact 231 is provided at an end of the metal dome 23 away from the first terminal 21, a first stationary contact 221 corresponding to the movable contact 231 is provided at the second terminal 22, and when the movable contact 231 abuts against the first stationary contact 221, the circuit is conducted. In this embodiment, when the metal elastic piece 23 is not elastically deformed, the movable contact 231 abuts against the first fixed contact 221, and the circuit is turned on, and when the metal elastic piece 23 is elastically deformed, the movable contact 231 is separated from the first fixed contact 221, and the circuit is turned off; in other embodiments, when the metal spring 23 is not elastically deformed, the movable contact 231 is separated from the first fixed contact 221, and the circuit is disconnected, and when the metal spring 23 is elastically deformed, the movable contact 231 is in contact with the first fixed contact 221, and the circuit is connected. The pressing block 24 is movably connected with the shell 10, and one end of the pressing block 24 is connected with the metal elastic sheet 23; further, the whole briquetting 24 is mushroom-shaped, the briquetting 24 includes a head 241 and a handle 242 which are connected in sequence, the diameter of the head 241 is greater than that of the handle 242, the head 241 is arranged at one end close to the metal elastic sheet 23, and a clamping groove (not shown) for sliding the handle 242 is arranged in the casing 10.

As shown in fig. 4, in an embodiment, the electronic control assembly 20 further includes a third terminal 25, the third terminal 25 and the second terminal 22 are disposed in the housing 10 at a distance, a second fixed contact 251 corresponding to the movable contact 231 is disposed on the third terminal 25, and the second fixed contact 251 is disposed opposite to the first fixed contact 221. When the third terminal 25 is provided, the first terminal 21 and the second terminal 22 are main circuits, the first terminal 21 and the third terminal 25 are branch circuits, the third terminal 25 is connected to an external indicating device (not shown), when the movable contact 231 abuts against the second stationary contact 251, the first terminal 21 and the third terminal 25 are connected, the indicating device operates to remind a user of any one or more modes such as sound and light, and the main circuits are in an off state.

Referring to fig. 2, the magnetic assembly 30 includes an outer magnet 31 and an inner magnet 32 disposed opposite to each other, the outer magnet 31 is disposed outside the housing 10, the inner magnet 32 is disposed inside the housing 10, the inner magnet 32 is connected to an end of the press block 24 away from the metal spring 23, and the outer magnet 31 is matched with the inner magnet 32 to make the metal spring 23 contact with or separate from the second terminal 22. The polarity of the side surfaces of the outer magnet 31 and the inner magnet 32 close to each other is related to the control logic of the magnetic microswitch 100 in the present application, in this embodiment, when the metal elastic sheet 23 is not elastically deformed, the movable contact 231 abuts against the first fixed contact 221, the circuit is on, when the metal elastic sheet 23 is elastically deformed, the movable contact 231 is separated from the first fixed contact 221, and the circuit is disconnected, and the design logic is that when the outer magnet 31 and the inner magnet 32 are close to each other, the inner magnet 32 causes the metal elastic sheet 23 to elastically deform, and the circuit is disconnected, so in this embodiment, the polarity of the side surfaces of the outer magnet 31 and the inner magnet 32 close to each other is the same, and the same poles repel each other.

In an embodiment, in order to improve magnetic force micro-gap switch 100's in this application sensitivity, only need little external force promptly can make metal shrapnel 23 take place elastic deformation, trigger magnetic force micro-gap switch 100 effect, automatically controlled subassembly 20 still includes sticks up pole 26, stick up the one end and the casing 10 swivelling joint of pole 26, the other end is connected with interior magnet 32, stick up pole 26 and metal shrapnel 23 are connected respectively to the both ends of briquetting 24, stick up pole 26 and can utilize lever principle through setting up, adopt less power can trigger metal shrapnel 23 elastic deformation, improve its sensitivity. Further, one end of the tilting rod 26, which is far away from the inner magnet 32, is provided with a rotating shaft 261, and the housing 10 is provided with a shaft hole (not shown) corresponding to the rotating shaft 261, so that the tilting rod 26 can rotate more smoothly through the matching of the rotating shaft 261 and the shaft hole.

The utility model discloses a magnetic force micro-gap switch 100, set up outer magnet 31 outside casing 10, set up interior magnet 32 in casing 10, and be connected interior magnet 32 and briquetting 24, through outer magnet 31 and interior magnet 32 cooperation, realize contactless control metal shrapnel 23 and the contact of second terminal 22 or separation, moreover, the steam of external world can be prevented, foreign matters such as dust cause the influence to micro-gap switch's normal work, security and stability have been improved, and be connected interior magnet 32 and briquetting 24, through outer magnet 31 and interior magnet 32 cooperation, realize contactless control metal shrapnel 23 and the contact of second terminal 22 or separation, moreover, the steam transmission is passed through, need not to set up the required hole of transmission on casing 10, waterproof performance has been improved, the application scene has been widened, place casing 10 in automatically controlled subassembly 20 and interior magnet 32 is equal, can prevent external steam, foreign matters such as dust.

As shown in fig. 5, for an application example of the magnetic microswitch 100 in water shortage protection for controlling heating of a hot water device, in the hot water device, when the water level in the water tank 50 is lower than a preset height, continuous heating may cause dry burning, thereby causing a safety accident, therefore, in order to avoid dry burning of the hot water device, a water level sensor or a microswitch is usually installed in the water tank 50 of the hot water device, and when the water level in the water tank 50 is lower than the preset height, the power of the heating device is cut off, so as to prevent dry burning. In this application example, a magnetic microswitch 100 is installed on a water tank 50 of a water heating device to realize water-shortage power-off, a floating ball 40 is installed inside the water tank 50, the floating ball 40 and a housing 10 are respectively installed inside and outside the water tank 50, and the floating ball 40 is arranged opposite to the housing 10. The floating ball 40 is connected with the inner wall of the water tank 10 in a swinging way, the outer magnet 31 is arranged at one side close to the shell 10 in the floating ball 40, the first terminal 21 is electrically connected with the positive pole of the power supply, and the second terminal 22 is electrically connected with the heating wire of the water heating device. When the water level in the water tank 50 is lower than the floating ball 40, the floating ball 40 is close to the inner wall of the water tank 50, the outer magnet 31 approaches to the inner magnet 32, the same poles repel each other, the metal elastic sheet 23 is promoted to be elastically deformed, the metal elastic sheet 23 is separated from the second terminal 22, the heating wire is disconnected from the power supply, the heating wire stops heating, and the situation that the water level in the water tank 50 is lower than the preset height and the heating is continued to cause dry burning is prevented; when the water level in the water tank 50 is higher than the floating ball 40, the floating ball 40 floats upwards under the action of the floating force and leaves the side wall of the water tank 50, so that the outer magnet 31 is far away from the inner magnet 32, the repulsive force exerted by the outer magnet 31 on the inner magnet 32 disappears, the metal elastic sheet 23 is restored to the original state, the metal elastic sheet 23 is abutted to the second terminal 22, the circuit is switched on, and the heating wire of the water heating device can work normally.

This magnetic force micro-gap switch 100 can also be applied to intelligent door and window, for example intelligent door and window's anti-theft system, installs outer magnet 31 on door (window) frame of door (window) window, installs casing 10 part at door (window) fan, utilizes the switch-on and the circuit break of opening and shutting control magnetic force micro-gap switch 100 of door (window), when this magnetic force micro-gap switch 100 during operation, when door (window) were opened, triggers magnetic force micro-gap switch 100 switch-on to realize burglar alarm.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A magnetic microswitch is characterized in that: comprises a shell, an electric control component and a magnetic component;

2. A magnetic microswitch as in claim 1 wherein: one end of the metal elastic sheet, which is far away from the first terminal, is provided with a moving contact, and the second terminal is provided with a first fixed contact corresponding to the moving contact.

3. The magnetic microswitch of claim 2 wherein: the electric control assembly further comprises a third terminal, the third terminal and the second terminal are arranged in the shell at intervals, a second fixed contact corresponding to the moving contact is arranged on the third terminal, and the second fixed contact and the first fixed contact are arranged oppositely.

4. A magnetic microswitch as in claim 1 wherein: the electronic control assembly further comprises a warping rod, one end of the warping rod is rotatably connected with the shell, the other end of the warping rod is connected with the inner magnet, and two ends of the pressing block are respectively connected with the warping rod and the metal elastic sheet.

5. The magnetic microswitch of claim 4 wherein: stick up the pole and keep away from the one end of interior magnet is provided with the pivot, be equipped with on the casing with the shaft hole that the pivot corresponds.

6. A magnetic microswitch as in claim 1 wherein: the polarities of the side faces, close to each other, of the outer magnet and the inner magnet are the same.

7. The magnetic microswitch of claim 1 wherein: the briquetting is including the head and the stalk portion that connect gradually, the diameter of head is greater than the diameter of stalk portion, the head sets up and is being close to the one end of metal shrapnel, be equipped with in the casing the gliding draw-in groove of stalk portion.

8. A magnetic microswitch as in claim 1 wherein: the shell comprises a bottom cover and an upper cover, the upper cover covers the bottom cover to form an accommodating cavity, and the accommodating cavity is used for accommodating the electric control assembly and the inner magnet.

9. The magnetic microswitch of claim 8 wherein: the shell further comprises two connecting lugs, the two connecting lugs are respectively connected with the upper cover and the bottom cover, and through holes for the fasteners to penetrate through are formed in the connecting lugs.