CN213546670U

CN213546670U - Emergency power supply and vehicle-mounted electric equipment

Info

Publication number: CN213546670U
Application number: CN202022305279.8U
Authority: CN
Inventors: 邓海权; 陈隆林
Original assignee: Shenzhen Juneng Vehicle Technology Co Ltd
Current assignee: Shenzhen Juneng Vehicle Technology Co Ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-06-25
Anticipated expiration: 2030-10-15

Abstract

The utility model relates to an emergency power source and on-vehicle consumer. The emergency power supply can be used for supplying power to the vehicle-mounted electric equipment. The spherical salient point and the spherical groove can keep a matching state through the magnetic adsorption action of the first magnet and the matching piece, so that the first conductive piece and the second conductive piece are electrically connected. The first conductive piece and the second conductive piece are in close contact through magnetic force, so that the problems of elastic fatigue and the like can not occur. Moreover, the spherical salient points are in spherical contact with the inner wall of the spherical groove, so that the contact area is large. Moreover, even if the first conductive member and the second conductive member are deflected due to severe vibration in a specific application scene, the contact area between the spherical convex point and the spherical groove is not reduced remarkably, so that reliable contact is ensured. Therefore, the reliability of the electrical connection between the emergency power supply and the vehicle-mounted electric equipment is remarkably improved.

Description

Emergency power supply and vehicle-mounted electric equipment

Technical Field

The utility model relates to an automotive supplies technical field, in particular to emergency power source and on-vehicle consumer.

Background

The electrical appliance is electrically connected with the power supply in a way of matching the socket and the plug, and the plug is in close contact with a conducting strip in the socket under the elastic action of an internal spring or an elastic sheet. In some application scenarios, the manner in which the socket and plug mate is prone to loosening due to vibration and friction. In addition, because the connecting object is contacted with the connected object by the elasticity of the spring or the elastic sheet, the connecting object and the connected object are in a physical elastic repulsion state, so that the problems of elastic fatigue, mechanical friction of a contact part, large contact internal resistance and the like are easy to occur, and further the reliability of the electric connection is poor.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an emergency power supply and an in-vehicle electric device that can improve the reliability of electrical connection, in order to solve the problem of the reliability of the conventional electrical connection method.

An emergency power supply is used for supplying power to electric equipment and comprises a power supply shell, an energy storage element, a circuit board, a first conductive piece and a first magnet, wherein the first conductive piece and the first magnet are arranged on the power supply shell;

and when the spherical convex point is in contact fit with the inner wall of the spherical groove, the first magnet is adsorbed to the fitting piece.

In one embodiment, the power supply housing includes an upper case and a soft rubber bottom plate, one side of the upper case is open, the soft rubber bottom plate is mounted on the upper case and covers the opening of the upper case, and the first magnet is accommodated in the power supply housing and disposed on the soft rubber bottom plate.

In one embodiment, the first magnet is a permanent magnet or an electromagnet.

In one embodiment, the first magnets are multiple, and the first conductive member is located between the multiple first magnets.

In one embodiment, a bearing plane is arranged on the electric equipment, an abutting plane is arranged on the power supply shell, and when the spherical convex points are in contact fit with the inner wall of the spherical groove, the abutting plane abuts against the bearing plane.

In one embodiment, the bearing plane is provided with a positioning protrusion, the abutting plane is provided with a positioning hole, and when the spherical convex point contacts and matches with the inner wall of the spherical groove, the positioning protrusion is clamped in the positioning hole.

A vehicle-mounted electric device, which can be powered by the emergency power supply of any one of the above preferred embodiments, includes a device body, a second conductive member, and a mating member capable of magnetically adhering to the first magnet, where the second conductive member and the mating member are disposed on the device body;

In one embodiment, the mating member is a second magnet having a polarity opposite to that of the first magnet.

In one embodiment, the conductive ball further comprises a buffer spring sleeved on the second conductive member, and when the spherical salient point is matched with the spherical groove, the buffer spring is abutted against the edge of the spherical groove.

In one embodiment, the power supply housing is provided with an abutting plane, the device body is provided with a bearing plane, and when the spherical convex points are in contact fit with the inner wall of the spherical groove, the abutting plane abuts against the bearing plane.

Above-mentioned emergency power source and on-vehicle consumer can make spherical bump and spherical recess keep the cooperation state through the magnetic adsorption effect of first magnet and fitting piece to make first electrically conductive piece and the electrically connected of second electrically conductive realization. The first conductive piece and the second conductive piece are in close contact through magnetic force, so that the problems of elastic fatigue and the like can not occur. Moreover, the spherical salient points are in spherical contact with the inner wall of the spherical groove, so that the contact area is large. Moreover, even if the first conductive member and the second conductive member are deflected due to severe vibration in a specific application scene, the contact area between the spherical convex point and the spherical groove is not reduced remarkably, so that reliable contact is ensured. Therefore, the reliability of the electrical connection between the emergency power supply and the vehicle-mounted electric equipment is remarkably improved.

Drawings

In order to more clearly illustrate the embodiments of the present application 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of the emergency power supply and the vehicle-mounted electric equipment according to the preferred embodiment of the present invention;

fig. 2 is an exploded view of an emergency power supply according to a preferred embodiment of the present invention;

fig. 3 is an enlarged partial schematic view of a first electrically conductive member of the emergency power supply of fig. 2;

fig. 4 is an exploded view of the emergency power supply of fig. 2 from another angle;

fig. 5 is a schematic structural diagram of a vehicle-mounted electric device according to a preferred embodiment of the present invention;

FIG. 6 is an exploded view of the in-vehicle electrical apparatus shown in FIG. 5;

fig. 7 is a partially enlarged schematic view of the second conductive member in the electrical equipment for vehicle shown in fig. 6.

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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used 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 the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" 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. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, the present invention provides an emergency power supply 100 and a vehicle-mounted electrical device 200, wherein the emergency power supply 100 is used for supplying power to the electrical device, such as the vehicle-mounted electrical device 200.

Referring to fig. 2 to 4, the emergency power supply 100 according to the preferred embodiment of the present invention includes a power supply housing 110, an energy storage element (not shown), a first conductive member 120, a first magnet 130 and a circuit board 140.

The power supply case 110 serves as a housing and is generally molded from a material such as resin or plastic. To achieve the basic function, the energy storage element and other elements such as the circuit board 140 can be accommodated in the power supply housing 110. The energy storage element can be an energy storage structure such as a lithium battery cell and a lead-acid battery cell, and can store electric energy in a chemical energy mode and convert the chemical energy into the electric energy again. The circuit board 140 is electrically connected to the energy storage element, and can perform switching, transforming, and current limiting control, so that the energy storage element can smoothly realize charging and discharging.

Specifically, in the present embodiment, the power housing 110 includes an upper shell 111 and a flexible glue base plate 112. One side of the upper case 111 is opened, and the soft rubber bottom plate 112 is installed at the upper case 111 and covers the opening of the upper case 111.

The upper shell 111 is typically a hard shell structure molded from plastic or resin. In order to facilitate taking and placing the emergency power supply 100, in this embodiment, the side wall of the upper case 111 is provided with an anti-slip rib 1111. The slip ribs 1111 can increase the friction when the operator grips the power supply housing 110. Meanwhile, the anti-slip ribs 1111 may increase the surface area of the upper case 111, thereby improving the heat dissipation efficiency of the power supply case 110.

The soft rubber base plate 112 may be soft molded from ordinary rubber, silica gel, or TPU (Thermoplastic polyurethane elastomers). Specifically, in this embodiment, the soft rubber bottom plate 112 is formed by molding TPU soft rubber. The soft rubber bottom plate 112 has better flexibility. Therefore, on the premise of ensuring the hard plate body structure, the thickness of the soft rubber bottom plate 112 can be significantly reduced compared with the traditional hard plate body structure. Generally, the wall thickness of a common hard shell structure needs to reach more than 2 millimeters to ensure the required strength; the soft rubber bottom plate 112 can be 0.8 mm thick and is not easy to damage.

The first conductive member 120 is disposed in the power supply housing 110. The first conductive member 120 is used to draw out the electric power from the emergency power supply 100, so the first conductive member 120 is generally formed of a good conductor such as copper, aluminum, or an alloy thereof. The first conductive member 120 may have a plate-shaped, sheet-shaped, or pillar-shaped structure. Specifically, in the present embodiment, the bottom plate 112 is provided with a position-avoiding hole 1121, and the first conductive member 120 is disposed opposite to the position-avoiding hole 1121.

Further, a spherical groove or a spherical bump is disposed on the first conductive member 120. Specifically, in the embodiment, the first conductive member 120 is cylindrical, and a spherical recess 121 is disposed on an end surface thereof. The spherical recess 121 means that its inner wall is a part of a spherical surface.

The first magnet 130 is disposed in the power supply housing 110. The first magnet 130 may be a permanent magnet or an electromagnet. Specifically, in the present embodiment, the first magnet 130 is a permanent magnet. For example, neodymium-iron-boron magnets, samarium-cobalt magnets, oxide magnets, and the like. The permanent magnet has the advantages of convenience in installation, low cost and the like, and the cost of the emergency power supply 100 can be reduced.

When the emergency power supply 100 is used, the power supply housing 110 can be attached to a metal shell of the electric equipment, and the power supply housing 110 can be attached to the electric equipment through the adsorption effect of the first magnet 130, so that the emergency power supply 100 is fixed. Therefore, the emergency power supply 100 can liberate both hands of an operator during use and is more convenient to use.

Specifically, in the present embodiment, the first magnet 130 is mounted on the flexible glue base 112. Therefore, when the emergency power supply 100 is used, the flexible glue base plate 112 is generally attached to the electric device, so that the magnetic force of the first magnet 130 is more easily transmitted to the electric device.

Because the soft rubber bottom plate 112 is soft, the abrasion to the shell of the electric equipment can be avoided. Moreover, the friction factor of the surface of the soft rubber bottom plate 112 is large, so that the friction force between the power supply housing 110 and the electric equipment can be increased. Therefore, even if there is a large vibration in the use environment, the emergency power supply 100 is not caused to slip off the electric equipment.

As mentioned above, since the flexible glue base plate 112 has better flexibility, compared with the conventional hard plate structure, the thickness of the flexible glue base plate 112 can be significantly reduced on the premise of ensuring that the flexible glue base plate is not easy to be damaged. Thus, the magnetic field of the fixed magnet 130 is more easily penetrated through the power supply housing 110, so that the fixed magnet 130 with a smaller magnetic flux can be selected to perform the function of adsorption and fixation, thereby avoiding the cost increase caused by using a magnet with a larger magnetic flux.

Further, in the present embodiment, the number of the first magnets 130 is multiple, and the positions of the multiple first magnets 130 on the flexible glue base 112 are adjustable.

The size and shape of the electric equipment are different according to different types or models. Through adjusting the distribution position of the first magnet 130 on the soft rubber bottom plate 112, the action site of the magnetic attraction force can be adjusted for different electric devices, so that the adsorption between the emergency power supply 100 and the electric devices is firmer.

Furthermore, in the present embodiment, a plurality of elastic slots 1122 are formed on the inner wall of the flexible glue base plate 112, and each of the first magnets 130 can be received and retained in any one of the elastic slots 1122.

The elastic slot 1122 may be formed by surrounding criss-cross ribs on the inner wall of the soft rubber bottom plate 112. The ribs and the soft rubber bottom plate 112 are integrally formed and are also made of TPU soft rubber, so that the clamping groove structure formed by enclosing the ribs has elasticity, and the length and the width of the clamping groove structure can be elastically changed within a certain range. The elastic slot 1122 can perform a better limiting and fixing function on the first magnet 130. When the position of the first magnet 130 needs to be adjusted, the flexible glue bottom plate 112 is opened first, and the first magnet 130 is buckled out 101 from one of the elastic slots 1122 and then clamped into the other elastic slot 1122.

Referring to fig. 5 to 7, the vehicle-mounted electric device 200 according to the preferred embodiment of the present invention includes a device body 210, a second conductive member 220 and a mating member 230.

The device body 210 is different according to the type of the electric device, and the vehicle-mounted electric device 200 in the present embodiment is a vehicle-mounted vacuum cleaner, so the device body 210 is a vacuum cleaner body. The vehicle-mounted electric equipment 200 can be powered by the emergency power supply 100.

The second conductive member 220 is disposed on the device body 210 and has a similar structure to the first conductive member 120. The second conductive member 220 is used for introducing current into the device body 210, so the second conductive member 220 is also generally formed of a good conductor such as copper, aluminum, or an alloy thereof. Also, the second conductive member 220 may have a plate-like, sheet-like, or column-like structure.

Further, a spherical groove or a spherical bump is formed on the second conductive member 220. The second conductive member 220 is provided with a structure different from that of the first conductive member 120. That is, when the first conductive member 120 is provided with the spherical recess, the second conductive member 220 is provided with the spherical bump; when the first conductive member 120 is provided with the ball bump, the second conductive member 220 is provided with the ball recess.

Specifically, in the present embodiment, the second conductive member 220 is in a cylindrical shape, and a spherical bump 221 is formed at the end of the second conductive member 220. The spherical bumps 121 may be complete spheres or parts of spheres, such as one-half sphere or three-quarters sphere. The outer surface of the spherical convex point 121 is spherical, and the outer diameter thereof is slightly smaller than the inner diameter of the spherical groove 121. Therefore, the spherical protrusions 121 may extend into the spherical recesses 121 and make spherical contact with the inner walls of the spherical recesses 121.

The fitting 230 is provided to the apparatus body 210. The fitting 230 may be a metal with good magnetic permeability. Such as a metal housing or a built-in metal bracket of the device body 210. In addition, the engaging member 230 may be a magnet having the same structure as the first magnet 130 and disposed in the apparatus body 210. Therefore, the engaging member 230 can magnetically attract the first magnet 130.

When the emergency power supply 100 and the vehicle-mounted electric device 200 are used for supplying power, the emergency power supply 100 needs to be attached to the vehicle-mounted electric device 200. Under the matching of the first magnet 130 and the matching member 230, the emergency power supply 100 is attracted to the in-vehicle electric device 200. Furthermore, when the ball-shaped protrusions 221 are in contact engagement with the inner walls of the ball-shaped grooves 121, the first magnet 130 is attracted to the engagement members 230.

When the spherical salient point 221 is matched with the spherical groove 121, the first conductive piece 120 is electrically connected with the second conductive piece 220, so that the emergency power supply 100 is electrically connected with the vehicle-mounted electric equipment 200, and the electric energy stored by the emergency power supply 100 can be transmitted to the vehicle-mounted electric equipment 200 through the first conductive piece 120 and the second conductive piece 220.

The spherical salient point 221 is in spherical contact with the inner wall of the spherical groove 121, and the contact area is large. Moreover, since the contact surface between the spherical bump 221 and the spherical groove 121 is a curved surface rather than a flat surface, the contact point therebetween is more three-dimensional, so that poor contact is less likely to occur, and the contact reliability is higher. Even if the vibration is severe in a specific application scenario, which causes the positions of the first conductive member 120 and the second conductive member 220 to be deviated, the contact area between the spherical bump 221 and the spherical recess 121 is not significantly reduced, thereby ensuring reliable contact.

In addition, the first magnet 130 and the fitting member 230 magnetically attract each other, so that the spherical bump 221 and the spherical recess 121 are always in a fitting state, and the first conductive member 120 and the second conductive member 220 are electrically connected. It can be seen that the first conductive member 120 and the second conductive member 220 are in close contact by magnetic force, and there is no elastic repulsion therebetween, so that the problems of elastic fatigue and the like do not occur. Therefore, the reliability of the electrical connection is significantly improved.

In the present embodiment, the engaging member 230 is a second magnet having a magnetic pole opposite to that of the first magnet 220. That is, when the first magnet 220 is engaged with the engaging member 230, the south pole of the first magnet 220 is opposite to the north pole of the second magnet; alternatively, the north pole of the first magnet 220 is opposite the south pole of the second magnet.

Specifically, when two magnets with opposite magnetic poles are attracted, the magnetic central axes of the two magnets are coincident. Therefore, the positions of the engaging member 230 and the first magnet 220 can be initially set such that the central axes of the magnetic forces of the two are coincident when the spherical convex point 221 is engaged with the inner wall of the spherical recess 121.

When the emergency power supply 100 is electrically connected to the in-vehicle electrical equipment 200, the mating member 230 and the first magnet 220, once they approach each other, tend to overlap each other under the action of magnetic force. Thus, under the action of the magnetic force, the engaging member 230 and the first magnet 220 will be overlapped, and the spherical protrusions 221 and the spherical grooves 121 will be aligned. That is, the fitting member 230 and the first magnet 220 have an automatic guiding and positioning function, so that the spherical bumps 221 and the spherical grooves 121 can be automatically aligned, manual alignment of the first conductive member 120 and the second conductive member 220 is not required, and convenience in operation is remarkably improved.

In the embodiment, the power supply housing 110 and the device body 210 are provided with the abutting plane 101 and the bearing plane 102, and when the spherical convex point 221 is in contact fit with the inner wall of the spherical groove 121, the abutting plane 101 abuts against the bearing plane 102.

Specifically, the abutting plane 101 may be located on the outer surface of the soft rubber bottom plate 112, and the bearing plane 102 is located on the outer surface of the apparatus body 210. When the emergency power supply 100 is electrically connected with the vehicle-mounted electrical appliance 200, the abutting plane 101 abuts against the bearing plane 102, so that plane support is realized between the emergency power supply 100 and the vehicle-mounted electrical appliance 200, the supporting stability is better, the actions of shaking, warping, deflecting and the like of the emergency power supply 100 during the electrical connection are effectively prevented, and the reliability of the electrical connection is ensured.

Further, in the present embodiment, the abutting plane 101 is provided with a positioning hole 1123, the bearing plane 102 is provided with a positioning protrusion 211, and when the spherical convex point 221 contacts and matches with the inner wall of the spherical groove 121, the positioning protrusion 211 is held in the positioning hole 1123.

Therefore, when the emergency power supply 100 is electrically connected to the vehicle-mounted electrical appliance 200, the positioning protrusion 211 is engaged with the positioning hole 1123, so that the emergency power supply 100 can be further prevented from shifting or swinging relative to the apparatus body 210, thereby further ensuring the reliability of the electrical connection.

In the present embodiment, the first magnets 130 are multiple, and the first conductive members 120 are located between the multiple first magnets 130.

Specifically, the first magnets 130 may be three and distributed in a delta shape. Correspondingly, the engaging members 230 are also plural and correspond to the positions of the first magnets 130. Since the first conductive members 120 are positioned between the plurality of first magnets 130. Therefore, when the first magnet 130 interacts with the mating member 230, the acting points of the magnetic force are distributed along the circumferential direction of the first conductive member 120, so that the first conductive member 120 and the second conductive member 220 are stressed more smoothly, and the reliability of the electrical connection between the first conductive member 120 and the second conductive member 220 is improved.

In this embodiment, the electrical apparatus 200 further includes a buffer spring 240 sleeved on the second conductive member 220, and when the spherical protrusion 221 is engaged with the spherical recess 121, the buffer spring 240 abuts against an edge of the spherical recess 121.

Specifically, when the first conductive member 120 is engaged with the second conductive member 220, the buffer spring 240 can prevent the spherical bump 221 from violently colliding with the inner wall of the spherical recess 121, thereby preventing unnecessary wear. In addition, during the use process, the buffer spring 240 can also absorb the kinetic energy generated by the vibration, so as to weaken the relative movement between the spherical bump 221 and the spherical groove 121, and further prevent the spherical bump 221 and the spherical groove 121 from being abraded.

As described above, in the present embodiment, the first magnet 130 is a permanent magnet. Obviously, in other embodiments, the first magnet 130 may also be an electromagnet.

The electromagnet comprises an iron core and a coil, the coil can generate magnetic force when being electrified, and the magnetic force disappears when the coil is powered off. When the emergency power supply 100 supplies power, the coil is also energized, so that adsorption is achieved. And after the emergency power supply 100 is used, the coil is powered off. At this time, the magnetic force of the first magnet 130 disappears, and magnetic attraction cannot be achieved, thereby facilitating the removal of the emergency power supply 100.

In the emergency power supply 100 and the vehicle-mounted electric device 200, the magnetic attraction between the first magnet 130 and the fitting member 230 can keep the spherical protrusion 221 and the spherical recess 121 in a fitting state, so that the first conductive member 120 and the second conductive member 220 are electrically connected. The first conductive member 120 and the second conductive member 220 are in close contact with each other by magnetic force, so that the problems of elastic fatigue and the like do not occur. Moreover, the spherical bumps 221 are in spherical contact with the inner wall of the spherical grooves 121, and the contact area is large. Moreover, even if the vibration is severe in a specific application scenario, which causes the positions of the first conductive member 120 and the second conductive member 220 to be deviated, the contact area between the spherical bump 221 and the spherical groove 121 is not significantly reduced, thereby ensuring reliable contact. Therefore, the reliability of the electrical connection between the emergency power supply 100 and the in-vehicle electric device 200 is significantly improved.

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. An emergency power supply is used for supplying power to electric equipment and is characterized by comprising a power supply shell, an energy storage element, a circuit board, a first conductive piece and a first magnet, wherein the first conductive piece and the first magnet are arranged on the power supply shell;

2. The emergency power supply of claim 1, wherein the power supply housing comprises an upper shell and a soft rubber bottom plate, one side of the upper shell is open, the soft rubber bottom plate is mounted on the upper shell and covers the opening of the upper shell, and the first magnet is accommodated in the power supply housing and arranged on the soft rubber bottom plate.

3. The emergency power supply of claim 1, wherein the first magnet is a permanent magnet or an electromagnet.

4. The emergency power supply of claim 1, wherein the first magnet is a plurality of magnets and the first electrically conductive member is located between the plurality of magnets.

5. The emergency power supply according to claim 1, wherein a bearing plane is provided on the electrical equipment, the power supply housing is provided with an abutment plane, and the abutment plane abuts against the bearing plane when the spherical convex point is in contact fit with the inner wall of the spherical groove.

6. The emergency power supply of claim 5, wherein the bearing plane is provided with a positioning protrusion, the abutting plane is provided with a positioning hole, and when the spherical protrusion is in contact fit with the inner wall of the spherical groove, the positioning protrusion is clamped in the positioning hole.

7. An electric vehicle-mounted device capable of being powered by the emergency power supply of any one of claims 1 to 6, wherein the electric vehicle-mounted device comprises a device body, a second conductive member and a mating member capable of magnetically adhering to the first magnet, and the second conductive member and the mating member are arranged on the device body;

8. The in-vehicle electric device according to claim 7, wherein the mating member is a second magnet having a magnetic pole opposite to that of the first magnet.

9. The vehicle-mounted electric equipment according to claim 7, further comprising a buffer spring sleeved on the second conductive member, wherein when the spherical convex point is matched with the spherical groove, the buffer spring is abutted against the edge of the spherical groove.

10. The vehicle-mounted electric equipment according to claim 7, wherein the power supply housing is provided with an abutting plane, the equipment body is provided with a bearing plane, and the abutting plane abuts against the bearing plane when the spherical convex points are in contact fit with the inner wall of the spherical groove.