CN112002612A - Weak current magnetic switch - Google Patents
Weak current magnetic switch Download PDFInfo
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- CN112002612A CN112002612A CN202010866501.3A CN202010866501A CN112002612A CN 112002612 A CN112002612 A CN 112002612A CN 202010866501 A CN202010866501 A CN 202010866501A CN 112002612 A CN112002612 A CN 112002612A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/01—Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
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Abstract
The invention discloses a weak electromagnetic force switch which comprises a fixed part, a movable part, an elastic component and an electromagnetic component, wherein the movable part and the fixed part are connected through a permanent magnetic component in a magnetic attraction manner; the elastic component is connected between the fixed part and the movable part in a compression mode; the electromagnetic assembly is used for generating magnetic force which is repulsive to the magnetic force of the movable part and the fixed part when the electromagnetic assembly is electrified so as to release the magnetic attraction state of the movable part and the fixed part; when the magnetic attraction state of the movable part and the fixed part is released, the pushing force generated by the elastic extension of the elastic component acts on the movable part. The weak current electromagnetic switch can be used as a safe and power-saving magnetic switch and a high-power driver.
Description
Technical Field
The invention relates to the technical field of well lids, in particular to a weak electromagnetic switch.
Background
The magnetic switch in the prior art is an electromagnetic switch, such as an electromagnetic lock, and when the electromagnetic switch is powered on, an electromagnet generates electromagnetic force to attract and lock an object to be locked.
Disclosure of Invention
The invention mainly aims to provide a safe and power-saving weak electromagnetic switch which can be used as a high-power driver.
In order to achieve the above object, the weak electromagnetic switch provided by the present invention comprises:
a fixed part;
the movable part and the fixed part are connected through a permanent magnetic component in a magnetic attraction manner;
the elastic component is connected between the fixed part and the movable part in a compression mode; and
the electromagnetic assembly is used for generating magnetic force which repels the magnetic force of the movable part and the fixed part when the electromagnetic assembly is electrified so as to release the magnetic attraction state of the movable part and the fixed part;
when the magnetic attraction state of the movable part and the fixed part is released, the pushing force generated by the elastic extension of the elastic component acts on the movable part.
In an embodiment, the permanent magnetic component includes a first attraction piece and a second attraction piece, the first attraction piece and the elastic component are arranged on the fixed portion, the second attraction piece is arranged on the movable portion and is opposite to the first attraction piece, one of the first attraction piece and the second attraction piece is a magnetic piece, and the other is a magnetic conduction piece.
In one embodiment, the first attraction piece and the second attraction piece are both magnetic pieces.
In an embodiment, the electromagnetic assembly is one, and is disposed on the fixed portion or the movable portion, and configured to generate a magnetic force repelling one of the first attraction member and the second attraction member when the electromagnetic assembly is powered on, so as to release the magnetic attraction state of the first attraction member and the second attraction member.
In one embodiment, the two electromagnetic assemblies are respectively arranged on the fixed part and the movable part, one of the two electromagnetic assemblies is used for generating a magnetic force which repels one of the first attraction piece and the second attraction piece when being electrified, and the other electromagnetic assembly is used for generating a magnetic force which is the same as the other one of the first attraction piece and the second attraction piece when being electrified so as to release the magnetic attraction state of the first attraction piece and the second attraction piece.
In an embodiment, the electromagnetic assembly is further configured to change a direction of a current when the electromagnetic assembly is energized, so as to control the movable portion to attract the fixed portion after the movable portion and the fixed portion are aligned.
In an embodiment, the electromagnetic component on the fixed portion is further configured to change a direction of a current when the electromagnetic component is energized to generate a magnetic force attracting the second attracting member, and the electromagnetic component on the movable portion is further configured to change a direction of a current when the electromagnetic component is energized to generate a magnetic force attracting the first attracting member, and after the movable portion is aligned with the fixed portion, the magnetic force generated by the electromagnetic component on the fixed portion and the magnetic force generated by the electromagnetic component on the movable portion control the movable portion and the fixed portion to attract each other.
In an embodiment, the weak electromagnetic switch further includes a guiding structure for guiding the elastic component axially when the elastic component is elastically extended.
In one embodiment, the guide structure is a guide sleeve, and the guide sleeve is slidably disposed at an end of the fixed portion opposite to the movable portion and connected to an end of the elastic component close to the movable portion; alternatively, the first and second electrodes may be,
the guide structure is a guide rod, the guide rod is provided with a first end and a second end which are opposite, the fixed part and the movable part are both in sleeve structures, the first end of the guide rod is inserted into the fixed part, the second end of the guide rod and one end, far away from the fixed part, of the elastic component are connected with each other so as to be arranged in a linkage manner, and the guide rod moves in the fixed part along the axial direction of the fixed part and moves and switches between a first position and a second position;
when force is applied to the movable part to compress the elastic component, the guide rod is pushed into the fixed part, and the movable part and the fixed part are connected in a magnetic attraction manner; when the movable part and the fixed part are sucked, filled and released, the elastic component elastically stretches, and the guide rod moves synchronously along with the elastic component so as to guide and position the elastic component.
In one embodiment, one end of the fixed part is provided with a first sliding groove, one end of the movable part is slidably inserted into the first sliding groove, and the first suction element is arranged at the bottom of the first sliding groove; the second suction piece is arranged at one end of the movable part inserted into the first sliding groove; one end of the movable part inserted into the first sliding groove is provided with a second sliding groove, one end of the elastic component is arranged in the first sliding groove, the other end of the elastic component is arranged in the second sliding groove in a sliding mode, and the movable part is abutted to the other end of the elastic component when the first suction component and the first suction component are in a suction state.
In an embodiment, the weak electromagnetic force switch further comprises a circuit assembly, the circuit assembly comprises a control circuit and a direct current power supply module for supplying power to the control circuit and the electromagnetic assembly, and the control circuit is used for controlling the electromagnetic assembly to be powered on or powered off.
In one embodiment, the dc power source is a battery.
The technical scheme of the invention realizes the connection of two objects by generating magnetic force through the permanent magnetic component, does not consume electric energy in the connection process, realizes primary energy conservation, and only needs to generate magnetic force repulsive to the permanent magnetic component through the electromagnetic component when the switch is opened, thereby realizing secondary energy conservation. In addition, the required electric quantity is very low, and the problem that the electric quantity is consumed by pulling wires or adopting other drives when the strong electricity is supplied is solved. For example, the device is used for well lid driving, and the comprehensive problem of power supply and safety can be solved. In addition, due to the driving force of the elastic component, the weak-current electromagnetic switch also has a large-power driving function. Therefore, the weak-current electromagnetic switch can be used as a safe and electricity-saving magnetic switch and a high-power driver.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a weak electromagnetic switch according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a weak electromagnetic switch according to a second embodiment of the present invention, wherein the movable portion and the fixed portion are in a pull-in state;
FIG. 3 is a schematic structural diagram of a weak electromagnetic switch according to a second embodiment of the present invention, wherein the movable portion and the fixed portion are separated;
FIG. 4 is a schematic structural diagram of a weak electromagnetic switch according to a third embodiment of the present invention, wherein the movable portion and the fixed portion are in a pull-in state;
FIG. 5 is a schematic structural diagram of a weak electromagnetic switch according to a third embodiment of the present invention, wherein the movable portion and the fixed portion are separated;
FIG. 6 is a schematic structural diagram of a weak electromagnetic switch according to a fourth embodiment of the present invention, wherein the movable portion and the fixed portion are in an engaged state;
fig. 7 is a schematic structural view of a weak electromagnetic switch according to a fourth embodiment of the present invention, wherein the movable portion and the fixed portion are separated.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | ||
| 100 | |
200 | |
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| 300 | |
400 | |
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| 500 | Electromagnetic assembly | 110 | A |
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| 300a | |
300b | |
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| | Guide rod | | Guide sleeve | ||
| 120 | Second limit part |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a weak electromagnetic switch.
Referring to fig. 1 to 7, the weak electromagnetic force switch according to the present invention includes:
a fixed portion 100;
the movable part 200, the said movable part 200 and the said fixed part 100 are connected through the magnetic attraction of the magnetic assembly 300 of permanent magnetism;
an elastic member 400 compression-coupled between the fixed part 100 and the movable part 200; and
an electromagnetic assembly 500 for generating a magnetic force repulsive to the magnetic force of the movable part 200 and the stationary part 100 when energized to release the magnetic attraction state of the movable part 200 and the stationary part 100;
when the magnetic attraction state between the movable portion 200 and the fixed portion 100 is released, the pushing force generated by the elastic extension of the elastic member 400 acts on the movable portion 200.
The weak electromagnetic force switch can be used for realizing the connection between any two objects, can also realize the function of an electromagnetic lock, and can also realize the stroke driving function. When applied specifically, the fixed portion 100 is used primarily for connecting to a stationary component, and the movable portion 200 is used for connecting to a movable or detachable component or an object to be stroke-driven.
The elastic assembly 400 may be a spring or a plurality of metal elastic pieces, and may assist in separating the movable portion 200 from the fixed portion 100, and may also provide a driving force to drive the movable portion 200 to move for a certain stroke.
The magnetic attraction connection between the movable part 200 and the fixed part 100 can be realized by arranging a permanent magnetic component 300 on the movable part 200 and the fixed part 100. The permanent magnet assembly 300 may be the movable portion 200 and the fixed portion 100 themselves or a part of the apparatus itself, or may be attached to the movable portion 200 and the fixed portion 100. The permanent magnetic component 300 can be implemented by a magnet, or magnetic steel, and the embodiment uses a permanent magnet, so that the magnetism is better.
The electromagnetic assembly 500 may be implemented by an electromagnet, and the polarity and magnitude of the magnetic force generated by the electromagnetic assembly 500 may be controlled by controlling the current direction and voltage magnitude of the coil of the electromagnet, so as to control the fixed portion 100 and the movable portion 200 to be attracted to or separated from each other. It should be noted that electromagnets have many advantages: the presence or absence of the magnetic field of the electromagnet can be controlled by switching on or off the current; the intensity of the magnetic field intensity can be controlled by the intensity of current or the number of turns of the coil (or the size of a control iron core); its magnetic poles may be controlled by changing the direction of the current, etc. Namely: the strength of the magnetic field can be changed, the existence of the magnetic field can be controlled, the direction of the magnetic pole can be changed, and the magnetic field can disappear due to the disappearance of the current.
It should be understood that, in a natural state, the elastic extension force of the elastic component 400 is smaller than the magnetic attraction force of the electromagnetic component 500, so that the electromagnetic component 500 can be attracted only by butting together. Under the power-on state, the magnetic force generated by the electromagnetic assembly 500 and the elastic stretching force of the elastic assembly 400 are superposed to be greater than the attraction force of the electromagnetic assembly 500, so that the fixed part 100 and the movable part 200 can be in the attraction-disengagement state only by controlling the magnitude of the magnetic force generated by the electromagnetic assembly 500. In order to ensure that the elastic extension force of the elastic component 400 can better drive the driving object connected to the movable part 200 to move, the magnetic force generated by the electromagnetic component 500 may be set to be greater than the magnetic attraction force between the fixed part 100 and the movable part 200.
The weak current electromagnetic switch of the embodiment has a connection state and a disconnection state, when the movable part 200 needs to be connected with the fixed part 100, the movable part 200 is manually operated to be aligned and close to the fixed part 100, the movable part 200 is attracted to the fixed part 100 through the magnetic attraction of the permanent magnetic component 300, the movable part 200 is attracted tightly on the fixed part 100 at the moment, connection is realized, and the weak current electromagnetic switch is in the connection state at the moment.
When the movable part 200 needs to be unlocked and disconnected, the electromagnetic assembly 500 is controlled to be energized, at this time, the electromagnetic assembly 500 generates a magnetic force with the same magnetic polarity as the electromagnetic assembly 500, and the magnetic attraction state of the movable part 200 and the fixed part 100 is released through the repulsion action with the same magnetic polarity, and as the attraction of the movable part 200 and the fixed part 100 is released, the extension force of the elastic assembly 400 drives the movable part 200 to be separated from the fixed part 100, so that the disconnection is realized, namely the disconnection state is realized. Due to the assistance of the elastic component 400, the weak-current electromagnetic switch can be used as a safe and power-saving magnetic switch and a large-power driver.
It should be noted that, after the weak current electromagnetic switch is controlled to be unlocked, the electromagnetic assembly 500 is controlled to be powered off or powered down immediately to stop consuming electric energy, so that the movable part 200 can be separated from the fixed part by using very small electric energy. Specifically, the electromagnetic assembly 500 may be controlled to be powered off/powered down after a preset time, for example, 1 second, when the electromagnetic assembly 500 is controlled to be powered on/powered up.
It can be understood that the weak electromagnetic switch of the present invention generates magnetic force through the permanent magnetic assembly 300 to realize the connection of two objects, no electric energy is consumed in the connection process, primary energy saving is realized, and when the weak electromagnetic switch is opened, only the magnetic force repulsive to the permanent magnetic assembly 300 needs to be generated through the electromagnetic assembly 500, secondary energy saving is realized, in addition, when the weak electromagnetic switch is in an attraction state contacting the movable part 200 and the fixed part 100, driving assistance can be formed through the driving force of the elastic assembly 400, and further reduction of the energy of the magnetic driving force is realized. In addition, the required electric quantity is very low, and the problem that the electric quantity is consumed by pulling wires or adopting other drives when the strong electricity is supplied is solved. For example, the device is used for well lid driving, and the comprehensive problem of power supply and safety can be solved.
In addition, the weak current electromagnetic switch also has a large power driving function due to the driving force of the elastic component 400. Therefore, the weak-current electromagnetic switch can be used as a safe and electricity-saving magnetic switch and a high-power driver.
In the above embodiment, the permanent magnetic assembly 300 may be disposed on one or more of the movable portion 200 and the fixed portion 100 to achieve a magnetic attraction connection therebetween. In an embodiment, the permanent magnetic component 300 realizes the magnetic attraction connection between the movable part 200 and the fixed part 100 by the following structure:
the permanent magnetic component 300 comprises a first attraction component 300a and a second attraction component 300b, the first attraction component 300a and the elastic component 400 are arranged on the fixing part 100, the second attraction component 300b is arranged on the movable part 200, the position of the first attraction component 300a is opposite to that of the second attraction component 300b, one of the first attraction component 300a and the second attraction component 300b is a magnetic component, and the other is a magnetic conduction component, so that the movable part 200 and the fixing part 100 are attracted and connected.
Optionally, one of the first suction element 300a and the second suction element 300b is a magnetic element, and the other is a magnetic conductive element, the magnetic element generates a magnetic attraction force, and the magnetic conductive element and the magnetic element are attracted to each other, so that the connection therebetween can be realized, and the attraction connection between the movable portion 200 and the fixed portion 100 can be further realized.
Of course, the first and second engaging elements 300a and 300b may be magnetic elements to enhance the reliability of the connection between the movable portion 200 and the fixed portion 100. It should be noted that, when the first engaging element 300a and the second engaging element 300b are both magnetic elements, the polarities of the first engaging element 300a and the second engaging element 300b are opposite, so that the first engaging element and the second engaging element are magnetically engaged with each other when they are aligned closely. The shapes of the first and second engaging elements 300a and 300b are not limited, and may be annular for use with the fixed and movable portions 100 and 200, or may have other shapes.
In this embodiment, the first engaging element 300a and the electromagnetic assembly 500 may be disposed on the fixed portion 100, and the second engaging element 300b may be disposed on the movable portion 200.
In one embodiment, the electromagnetic assembly 500 is disposed on the fixed portion 100 or the movable portion 200, and is configured to generate a magnetic force repelling one of the first attraction member 300a and the second attraction member 300b when being powered on, so as to release the magnetic attraction state of the first attraction member 300a and the second attraction member 300 b.
That is, the solenoid assembly 500 may be used to generate a repulsive magnetic force of one of the first attraction members 300a to release the magnetically attracted state of the first and second attraction members 300a and 300 b. Alternatively, the electromagnetic assembly 500 may be used to generate a repulsive magnetic force of one of the second engaging elements 300b to release the magnetic engaging state of the first engaging element 300a and the second engaging element 300 b.
In another embodiment, the two electromagnetic assemblies 500 are respectively disposed on the fixed portion 100 and the movable portion 200, wherein one of the two electromagnetic assemblies is configured to generate a magnetic force repelling one of the first attraction member 300a and the second attraction member 300b when being powered on, and the other one of the two electromagnetic assemblies is configured to generate a magnetic force identical to the other one of the first attraction member 300a and the second attraction member 300b when being powered on, so as to release the magnetic attraction state of the first attraction member 300a and the second attraction member 300 b. In which one of the solenoid assemblies 500 generates a magnetic force opposite to one of the first and second suction members 300a and 300b and the other generates the same magnetic force, thus enhancing a repulsive force, that is, in this embodiment, the two solenoid assemblies 500 increase the breaking speed and force of the first and second suction members 300a and 300b by enhancing repulsive magnetic force, thereby preventing the sticking.
In the above embodiment, further, when the movable portion 200 and the fixed portion 100 need to be closed, the electromagnetic assembly 500 is further configured to change the direction of the current when the power is applied, so as to control the movable portion 200 to attract to the fixed portion 100 after the movable portion 200 is aligned with the fixed portion 100. That is, the electromagnetic assembly 500 of the fixed portion 100 is controlled to generate the same magnetic force as the first attraction member 300a by being energized, so as to attract the movable portion 200.
Of course, in order to increase the magnetic force, the electromagnetic assembly 500 on the movable portion 200 can be controlled to be energized to generate a magnetic force attracting the first attraction member 300a, so that the movable portion 200 and the fixed portion 100 can be quickly and effectively attracted. Specifically, the electromagnetic component 500 of the fixed portion 100 is further configured to change the direction of the current when the power is turned on, so as to generate a magnetic force attracting the second attracting element 300b, and the electromagnetic component 500 of the movable portion 200 is further configured to change the direction of the current when the power is turned on, so as to generate a magnetic force attracting the first attracting element 300a, after the movable portion 200 is aligned with the fixed portion 100, the magnetic force generated by the electromagnetic component 500 of the fixed portion 100 and the magnetic force generated by the electromagnetic component 500 of the movable portion 200 control the movable portion 200 and the fixed portion 100 to attract each other.
It should be noted that, in practical application, the movable portion 200 and the fixed portion 100 are installed on corresponding objects, and as long as the relative position distance is within the magnetic attraction range after the alignment, the movable portion 200 is attracted to the fixed portion 100 to achieve the connection as long as the electromagnetic assembly 500 is energized to generate the attraction force. Of course, in order to facilitate the magnetic connection, sleeves may be sleeved on the movable part 200 and the fixed part 100, so that the movable part 200 and the elastic assembly 400 are guided when the movable part 200 and the fixed part 100 are closed or the movable part 200 and the fixed part 100 are opened.
It should be understood that the electromagnetic assembly is an electromagnet, and the polarity and the attraction force of the magnet can be changed by controlling the current direction and the current magnitude of the electromagnet coil.
In the above embodiment, further, the first absorbing element 300a and the elastic component 400 are disposed at one end of the fixed portion 100 close to the movable portion 200, and the second absorbing element 300b is disposed at one end of the movable portion 200 close to the fixed portion 100. With such a configuration, the fixed portion 100 and the movable portion 200 can be easily separated, the driving stroke can be shortened, and the driving stroke of the elastic assembly 400 can be reduced.
In an embodiment, referring to fig. 4 and 5, the movable portion 200 and the fixing portion 100 are sleeved and connected with each other, and the movable portion 200 is inserted into the fixing portion 100, and the fixing portion 100 limits the first limiting portion 110 limiting the movable portion from being detached. The embodiment can be mainly used for stroke driving.
In an embodiment, the weak electromagnetic switch further includes a guiding structure for guiding the elastic member 400 axially when the elastic member 400 is elastically extended. The addition of the guide structure 340 to guide the elastic assembly 400 can further prevent the elastic assembly 400 from bending when the movable portion 200 is driven to move. The arrangement of the guiding structure can also enhance the axial driving force of the elastic assembly 400, so as to further serve as a large-power driver.
In an embodiment, referring to fig. 3 and 4, the guiding structure is a guide rod 600a, the guide rod 600a is inserted into the elastic component 400, and two end portions are inserted into the fixed portion 100 and the movable portion 200 correspondingly to realize guiding.
Specifically, the guide rod 600a has a first end and a second end opposite to each other, the fixed portion 100 and the movable portion 200 are both in a sleeve structure, the first end of the guide rod 600a is inserted into the fixed portion 100, the second end of the guide rod 600a and an end of the elastic component 400 away from the fixed portion 100 are connected to each other to be in linkage arrangement, and the guide rod 600a moves in the fixed portion 100 along the axial direction thereof and moves and switches between a first position and a second position;
when a force is applied to the movable part 200 to compress the elastic component 400, the guide rod 600a is pushed into the fixed part 100, and the movable part 200 and the fixed part 100 are magnetically attracted and connected; when the movable portion 200 and the fixed portion 100 are removed from the suction, the elastic member 400 is elastically stretched, and the guide rod 600a moves synchronously with the elastic member 400 to guide and position the elastic member 400.
After the elastic component 400 is fully extended, at least a portion of the elastic component extends out of the fixing portion 100. It will be appreciated that the resilient member 400 does not flex during compression and extension by the guiding action of the guide bar 600 a.
In one embodiment, referring to fig. 1 or fig. 6 and 7, the guiding structure is a guiding sleeve 600b sleeved on the combining position of the fixed portion 100, the movable portion 200 and the elastic assembly 400.
Specifically, the guiding structure is a guiding sleeve 600b, and the guiding sleeve 600b is slidably disposed at an end of the fixed portion 100 opposite to the movable portion 200, and is connected to an end of the elastic assembly 400 close to the movable portion 200. The elastic member 400 is not bent during compression and extension by the guide of the guide sleeve 600 b.
Further, in order to limit the moving stroke of the guide sleeve 600b, the fixing portion 100 is provided with a second limiting portion 120, which is used for abutting against one end of the guide sleeve 600b away from the movable portion 20 when the movable portion 20 and the fixing portion 100 are in the attraction state, so as to limit the sliding stroke of the guide sleeve 600b in the axial direction of the fixing portion 100.
In this embodiment, when the movable portion 20 is abutted and engaged with the fixing portion 100, the elastic component 400 is compressed, and the guide sleeve 600b slides toward the second limiting portion 120, so that the guide sleeve 600b does not slide any more when sliding to approach or abut against the second limiting portion 120, thereby preventing the movable portion 20 from impacting the fixing portion 100 excessively.
In addition, in an embodiment, the guiding of the elastic element 400 can also be achieved by designing a part of the movable portion 200 to be inserted into or sleeved on the fixed portion 100, wherein the pipe diameter of the fixed portion 100 or a corresponding part of the movable portion 200 can be set to be larger to form a step for mounting the first absorbing element 300a and the elastic element 400.
Alternatively, one end of the fixing portion 100 is provided with a first sliding groove, one end of the movable portion 200 is slidably inserted into the first sliding groove (not shown, similar to the structure of the fixing portion shown in fig. 3, and can be referred to), and the first suction element 300a is disposed at the bottom of the first sliding groove; the second engaging member 300b is provided at one end of the movable portion 200 inserted into the first sliding groove; a second sliding groove (not shown) is formed at one end of the movable part 200 inserted into the first sliding groove, one end of the elastic member 400 is disposed in the first sliding groove, and the other end of the elastic member 400 is slidably disposed in the second sliding groove and abuts against the movable part 200 when the first suction member 300a and the first suction member 300a are in a suction state. Through the mutual insertion and matching between the fixed part 100 and the movable part 200, the guiding function of the elastic component 400 can also be realized, and the elastic component 400 is positioned and guided by the first sliding groove and the second sliding groove and cannot be bent in the compression and extension processes.
In this embodiment, the movable portion 200 and the fixed portion 100 can be directly engaged with each other to achieve guiding without adding a guiding structure. In addition, in this embodiment, the first suction element 300a and the second suction element 300b may be configured as a magnetic ring for the elastic component 400 to pass through, so as to facilitate the installation of the elastic component 400 and the design of the driving stroke.
In one embodiment, the weak electromagnetic force switch further comprises a circuit assembly including a control circuit for controlling the electromagnetic assembly 500 to be powered on or off and a dc power module for supplying power to the control circuit and the electromagnetic assembly 500.
In this embodiment, the circuit component may be disposed on the fixed portion 100, and at this time, the movable portion 200 only needs to be disposed with a permanent magnet, which is convenient to implement. When the movable portion 200 is also provided with the electromagnetic assembly 500, the end surface of the movable portion 200 opposite to the fixed portion 100 is further provided with a contact or a contact point connected with the electromagnetic assembly 500, and the corresponding fixed portion 100 is also provided with a contact or a contact point connected with the control circuit, after the movable portion 200 and the fixed portion 100 are attracted, the contact or the contact point of the movable portion 200 and the contact point of the fixed portion 100 are mutually butted, and when the control circuit controls the direct-current power supply module to output electric energy, the electromagnetic assembly 500 on the movable portion 200 can be controlled to work.
The direct-current power supply module can comprise a USB interface, a battery mounting groove and a direct-current power supply circuit, and the battery mounting groove can be used for loading a disposable battery or a storage battery. The battery is adopted for power supply, so that the charging device is very safe, and when the storage battery is adopted, repeated charging is practical.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (12)
1. A weak-electromagnetic force switch, comprising:
a fixed part;
the movable part and the fixed part are connected through a permanent magnetic component in a magnetic attraction manner;
the elastic component is connected between the fixed part and the movable part in a compression mode; and
the electromagnetic assembly is used for generating magnetic force which repels the magnetic force of the movable part and the fixed part when the electromagnetic assembly is electrified so as to release the magnetic attraction state of the movable part and the fixed part;
when the magnetic attraction state of the movable part and the fixed part is released, the pushing force generated by the elastic extension of the elastic component acts on the movable part.
2. The weak electromagnetic force switch of claim 1, wherein the permanent magnet assembly includes a first engaging member and a second engaging member, the first engaging member and the elastic member are disposed on the fixed portion, the second engaging member is disposed on the movable portion and is located opposite to the first engaging member, one of the first engaging member and the second engaging member is a magnetic member, and the other is a magnetic conductive member.
3. The weak electromagnetic force switch of claim 2, wherein the first and second attraction members are magnetic members.
4. A weak electromagnetic force switch according to claim 3, wherein the electromagnetic member is a single member provided on the fixed portion or the movable portion for generating a magnetic force repelling one of the first attraction member and the second attraction member when the power is applied to release the magnetic attraction state of the first attraction member and the second attraction member.
5. The weak electromagnetic force switch as claimed in claim 3, wherein the electromagnetic assembly is provided in two parts, respectively, on the fixed part and the movable part, one of which is used for generating a magnetic force that repels one of the first and second attraction members when the switch is powered on, and the other of which is used for generating the same magnetic force as the other of the first and second attraction members when the switch is powered on, so as to release the magnetic attraction state of the first and second attraction members.
6. A weak electromagnetic switch according to claim 1, wherein said electromagnetic assembly is further adapted to change the direction of the current when energized, so as to control the movable portion to be attracted to the stationary portion after the movable portion is aligned with the stationary portion.
7. The weak electromagnetic force switch of claim 5, wherein the electromagnetic assembly of the fixed portion is further configured to change the direction of the current when energized to generate a magnetic force attracting the second attracting member, and the electromagnetic assembly of the movable portion is further configured to change the direction of the current when energized to generate a magnetic force attracting the first attracting member, wherein the magnetic force generated by the electromagnetic assembly of the fixed portion and the magnetic force generated by the electromagnetic assembly of the movable portion control the movable portion and the fixed portion to attract each other after the movable portion and the fixed portion are aligned.
8. A weak electromagnetic force switch according to claim 3, further comprising a guide structure for guiding said elastic member axially when said elastic member is elastically expanded.
9. A weak electromagnetic switch according to claim 8, wherein said guiding structure is a guiding sleeve slidably disposed at an end of said fixed portion opposite to said movable portion and connected to an end of said elastic member adjacent to said movable portion; alternatively, the first and second electrodes may be,
the guide structure is a guide rod, the guide rod is provided with a first end and a second end which are opposite, the fixed part and the movable part are both in sleeve structures, the first end of the guide rod is inserted into the fixed part, the second end of the guide rod and one end, far away from the fixed part, of the elastic component are connected with each other so as to be arranged in a linkage manner, and the guide rod moves in the fixed part along the axial direction of the fixed part and moves and switches between a first position and a second position;
when force is applied to the movable part to compress the elastic component, the guide rod is pushed into the fixed part, and the movable part and the fixed part are connected in a magnetic attraction manner; when the movable part and the fixed part are sucked, filled and released, the elastic component elastically stretches, and the guide rod moves synchronously along with the elastic component so as to guide and position the elastic component.
10. A weak electromagnetic switch according to claim 3, wherein one end of said fixed portion is provided with a first sliding groove, one end of said movable portion is slidably inserted into said first sliding groove, and said first suction member is provided at a bottom of said first sliding groove; the second suction piece is arranged at one end of the movable part inserted into the first sliding groove; one end of the movable part inserted into the first sliding groove is provided with a second sliding groove, one end of the elastic component is arranged in the first sliding groove, the other end of the elastic component is arranged in the second sliding groove in a sliding mode, and the movable part is abutted to the other end of the elastic component when the first suction component and the first suction component are in a suction state.
11. The weak electromagnetic force switch of claim 1, further comprising a circuit assembly including a control circuit and a dc power module for powering the control circuit and the electromagnetic assembly, the control circuit for controlling the electromagnetic assembly to power up or power down.
12. A weak electromagnetic switch according to claim 11, wherein said dc power source is a battery.
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| CN202010866501.3A CN112002612B (en) | 2020-08-24 | 2020-08-24 | Weak electromagnetic switch |
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