CN212113510U

CN212113510U - Small switch with 250V rated DC voltage

Info

Publication number: CN212113510U
Application number: CN202020662075.7U
Authority: CN
Inventors: 沈治民; 黄永捷
Original assignee: Liuzhou Luoshan Technology Co ltd
Current assignee: Liuzhou Luoshan Technology Co ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-12-08
Anticipated expiration: 2030-04-27

Abstract

The utility model provides a rated direct current voltage 250 volt small switch, include: the device comprises a shell, a permanent magnet arranged in the shell, a static contact and a moving contact which are arranged on the side surface of the permanent magnet, wherein the static contact is fixedly connected with a conductive connecting piece, the conductive connecting piece is fixed on the shell and penetrates out of the shell to be electrically connected with a first wiring terminal, the moving contact is fixedly connected with a phosphor copper sheet, the phosphor copper sheet is fixed on the shell and penetrates out of the shell to be electrically connected with a second wiring terminal, and the contact surface of the static contact and the moving contact is attached; the ejector rod is movably connected with the shell, one end of the ejector rod is positioned above the phosphor copper sheet, and the other end of the ejector rod is positioned outside the shell; an electron flow channel arranged in a direction perpendicular to the magnetic field of the permanent magnet. The utility model provides a rated direct current voltage 250 volt little switches increases the magnetic blow-out arc and sets up the electron stream channel according to the lorentz force direction, just can switch direct current 250 volt electrical apparatus steadily.

Description

Small switch with 250V rated DC voltage

Technical Field

The utility model belongs to the technical field of direct current switch, concretely relates to rated direct current voltage 250 volt little switch.

Background

The moving contact and the static contact of the existing switch are insulated by air, when the switch is used for an alternating current power supply and the moving contact and the static contact move from near to far in breaking, even if an arc is drawn, a voltage is zero within 10 milliseconds, and the arc is extinguished. However, in the case of a dc power supply, the results are different. The negative pole emits electrons to the positive pole to break down air insulation to form electric arcs, and arc extinction can not be carried out until the electric arcs can not break down air between the moving contact and the static contact. It has been confirmed in experiments that arcs can be extinguished by disturbing the electron trajectories using the lorentz force principle of the magnetic field. But has not been applied to small switches so far. The existing solutions do not emphasize the passage of the electrons towards the flow, which may lead to a reason for the magnetic quenching microswitch that is not practical.

The Chinese patent with the publication number of CN102881493A discloses a rapid arc extinguishing switch with electromagnetic eddy current repulsion, which comprises a static contact, a moving contact arranged opposite to the static contact and an electromagnetic eddy current repulsion mechanism connected with the moving contact, wherein the static contact is connected with a high-voltage bus, the moving contact is connected with a grounding bus, the electromagnetic eddy current repulsion mechanism comprises a step-shaped push rod, a coil disc and a metal disc sleeved on the small-diameter end of the push rod, and a permanent magnet disc sleeved on the large-diameter end of the push rod, the large-diameter end of the push rod is connected with the moving contact, the small-diameter end of the push rod is provided with a separating brake retaining snap spring, the coil disc is connected in an energy storage loop in series, and the metal disc is positioned.

It can be seen that the prior art mainly considers magnetic quenching, but cannot solve the problem of guiding the flow direction of electrons, and metal particles are generated nearby after long-time use to cause switch failure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rated direct current voltage 250 volts of little switch aims at solving among the prior art magnetic blow-out arc-extinguishing little switch guide electron flow direction's technical problem.

For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:

the utility model provides a rated direct current voltage 250 volt small switch, include: the device comprises a shell, a permanent magnet arranged in the shell, a static contact and a moving contact which are arranged on the side surface of the permanent magnet, wherein the static contact is fixedly connected with a conductive connecting piece, the conductive connecting piece is fixed on the shell and penetrates out of the shell to be electrically connected with a first wiring terminal, the moving contact is fixedly connected with a phosphor copper sheet, the phosphor copper sheet is fixed on the shell and penetrates out of the shell to be electrically connected with a second wiring terminal, and the contact surface of the static contact and the moving contact is attached;

the ejector rod is movably connected with the shell, one end of the ejector rod is positioned above the phosphor copper sheet, and the other end of the ejector rod is positioned outside the shell;

an electron flow channel arranged in a direction perpendicular to the magnetic field of the permanent magnet.

Preferably, two electron flow channels are arranged in the direction of the perpendicular to the magnetic field of the permanent magnet, and the two electron flow channels are located on two sides of the fixed contact and the movable contact.

Preferably, an insulating protective layer is arranged outside the permanent magnet.

The utility model has the advantages that:

1. the utility model provides a rated direct current voltage 250 volt little switches increases the magnetic blow-out arc and sets up the electron stream channel according to the lorentz force direction, just can switch direct current 250 volt electrical apparatus steadily. The improved switch can also be used as an AC appliance switch, and is more favorable for eliminating electric arcs.

Drawings

Fig. 1 is a schematic structural diagram of a small switch of 250 v rated dc voltage according to the present invention in a closed state;

fig. 2 is a schematic structural diagram of the small switch of the present invention with a rated dc voltage of 250 v in an open state;

fig. 3 is a schematic structural diagram of an electron flow channel according to the present invention;

fig. 4 is a schematic diagram of the arc extinguishing principle of the present invention.

In the figure, 100-shell, 101-permanent magnet, 102-phosphor copper sheet, 103-moving contact, 104-static contact, 105-conductive connecting piece, 106-ejector rod, 107-first terminal, 108-second terminal, 109-electron current channel, 110-first channel, 111-second channel and 112-insulating protective layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail by the following embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In an embodiment of the present invention, a small switch with a rated dc voltage of 250 v is provided, as shown in fig. 1, including: the device comprises a shell 100, a permanent magnet 101 arranged in the shell 100, a fixed contact 104 and a movable contact 103 arranged on the side surface of the permanent magnet 101, wherein the fixed contact 104 is fixedly connected with a conductive connecting piece 105, the conductive connecting piece 105 is fixed on the shell 100 and penetrates out of the shell 100 to be electrically connected with a first terminal 107, the movable contact 103 is fixedly connected with a phosphor copper sheet 102, the phosphor copper sheet 102 is fixed on the shell 100 and penetrates out of the shell 100 to be electrically connected with a second terminal 108, and the contact surface of the fixed contact 104 and the movable contact 103 is attached;

the ejector rod 106 is movably connected with the shell 100, one end of the ejector rod 106 is positioned above the phosphor copper sheet 102, and the other end of the ejector rod 106 is positioned outside the shell 100; when the switch is required to be controlled to be switched off, as shown in fig. 2, the push rod 106 moves downwards to apply pressure to the phosphor copper sheet 102, the phosphor copper sheet 102 drives the moving contact 103 and the static contact 104 to be switched off, under the environment of 250-volt direct-current voltage, an electronic current (electric arc) is often generated during switching off, the electronic current generated during switching off is subjected to the action of lorentz force due to the existence of a magnetic field generated by the permanent magnet 101, and the original movement from the negative pole to the positive pole is changed, so that the purpose of arc extinction is achieved; when the switch needs to be controlled to be closed, the ejector rod 106 moves upwards to leave the phosphor copper sheet 102, and the phosphor copper sheet 102 drives the moving contact 103 to be attached to the static contact 104 under the action of the elasticity of the phosphor copper sheet 102, so that the switch is closed;

the electron flow channels 109 are arranged in the direction perpendicular to the magnetic field of the permanent magnet 101, and for achieving a better arc extinguishing effect, the electron flow channels 109 are arranged to move the electron flow (arc) in the direction perpendicular to the magnetic field, so that the electron flow channels 109 arranged in the direction perpendicular to the magnetic field can effectively and rapidly dissipate the electron flow.

In one embodiment, as shown in fig. 3, two channels, namely a first channel 110 and a second channel 111, are arranged in the direction of the perpendicular to the magnetic field of the permanent magnet 101, the first channel 110 is located on one side of the fixed contact 104 and the movable contact 103, and the second channel 111 is located on the other side of the fixed contact 104 and the movable contact 103; as shown in fig. 4, when the left side of the permanent magnet 101 is S-level and the right side is N-level, the magnetic field direction is from left to right, if the current flows from the static contact 104 to the movable contact 103, the direction of the lorentz force applied to the electrons is outward (please refer to the arrow direction in fig. 4) according to the left-hand rule, and the electron current generated by the breaking of the movable contact 103 and the static contact is rapidly circulated and dissipated in the first channel 110 corresponding to the arrow direction in the first channel 110 in fig. 3; if the current flows from the moving contact 103 to the stationary contact 104, the electrons are forced inward by the lorentz force (opposite direction to the arrow in fig. 4); when the left side of the permanent magnet 101 is N-level and the right side is S-level (not shown in the figure), the magnetic field direction is from right to left, if the current flows from the static contact 104 to the movable contact 103, according to the left-hand rule, the electrons are forced inward (the direction opposite to the direction of the arrow in fig. 4) by the lorentz force, and correspond to the direction of the arrow in the second channel 111 in fig. 3, and the electron current generated by the breaking is rapidly circulated and dissipated in the second channel 111; when the current flows from the moving contact 103 to the stationary contact 104, electrons are forced outward by the lorentz force (arrow direction in fig. 4).

In some embodiments, an insulating protective layer 112 is further disposed outside the permanent magnet 101, and since the permanent magnet 101 is plated with metal, the insulating protective layer 112 can effectively prevent short circuit.

Reference in the specification to "some embodiments," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with a feature, structure, or characteristic of one or more other embodiments without limitation, as long as the combination is not logical or operational. Additionally, the various elements of the drawings of the present application are merely schematic illustrations and are not drawn to scale.

Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be within the spirit and scope of the invention.

Claims

1. A small switch with a rated direct-current voltage of 250V is characterized by comprising:

the device comprises a shell, a permanent magnet arranged in the shell, a static contact and a moving contact which are arranged on the side surface of the permanent magnet, wherein the static contact is fixedly connected with a conductive connecting piece, the conductive connecting piece is fixed on the shell and penetrates out of the shell to be electrically connected with a first wiring terminal, the moving contact is fixedly connected with a phosphor copper sheet, the phosphor copper sheet is fixed on the shell and penetrates out of the shell to be electrically connected with a second wiring terminal, and the contact surface of the static contact and the moving contact is attached;

2. A small switch rated for dc 250 v according to claim 1, wherein: two electron flow channels are arranged in the direction of the perpendicular line of the magnetic field of the permanent magnet, and the two electron flow channels are positioned on two sides of the fixed contact and the movable contact.

3. A small switch with a rated dc voltage of 250 v according to claim 1 or 2, characterized in that: and an insulating protective layer is arranged on the outer side of the permanent magnet.