CN210629980U

CN210629980U - Circuit board and household appliance

Info

Publication number: CN210629980U
Application number: CN201921414817.8U
Authority: CN
Inventors: 王海平
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-05-26
Anticipated expiration: 2029-08-28

Abstract

The utility model provides a circuit board and domestic appliance, the circuit board includes: the electronic component comprises a substrate (100) and a plurality of electronic components (200) arranged on the substrate (100), wherein the substrate (100) is provided with a first surface (11) and a second surface (12) which are oppositely arranged, the periphery of at least one electronic component (200) is covered with a metal shielding cover (300), the metal shielding cover (300) is positioned on the first surface (11), the bottom end of the metal shielding cover (300) is opened, the edge of the opening is provided with a plurality of fixing pins (31), a plurality of mounting holes (13) which are communicated with the first surface (11) and the second surface (12) are formed in the substrate (100), and the fixing pins (31) penetrate through the mounting holes (13) and are bent and attached to the second surface (12). The utility model provides a circuit board and domestic appliance, the assembly is simple and convenient, and the processing cost is low, can play the anti-interference and the radiation protection effect of preferred.

Description

Circuit board and household appliance

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to a circuit board and household appliances.

Background

The circuit board is a common electronic component in household appliances, and the circuit board is used as a carrier of electronic components and plays an important role in fixing circuits and optimizing the layout of the appliances. The stability and safety of the circuit board structure directly affect the use performance of the household appliance.

The circuit board comprises Printed circuit board (PCB for short) and the electronic components who sets up on the PCB board, and electronic components welds on the PCB board, arranges the pin connection through the copper foil between the solder joint and forms the circuit for the circuit board possesses corresponding automatically controlled performance. Because can produce interference and radiation between a plurality of electronic components, generally as the shield cover through setting up the metalwork among the prior art, the shield cover welds on the PCB board to the cover is established in the electronic components outside, in order to play anti-interference and radiation protection's effect.

However, the shielding case is fixed on the PCB by welding, which not only has complex process operation and high processing cost, but also needs to avoid influencing the welding spots and leads of the electronic components inside or around the shielding case during welding, and thus requires a large operating space and high operating difficulty.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a circuit board and domestic appliance, the assembly is simple and convenient, and the processing cost is low, can play the anti-interference and the radiation protection effect of preferred.

In order to achieve the above object, in a first aspect, the present invention provides a circuit board, including: a substrate and a plurality of electronic components disposed on the substrate,

the substrate is provided with a first surface and a second surface which are oppositely arranged, at least one periphery of the electronic component is covered with a metal shielding cover, the metal shielding cover is located on the first surface, the bottom end of the metal shielding cover is provided with an opening, the edge of the opening is provided with a plurality of fixing pins, a plurality of mounting holes which are communicated with the first surface and the second surface are formed in the substrate, and the fixing pins penetrate through the mounting holes and are bent and attached to the second surface.

The embodiment of the utility model provides a circuit board, through setting up electronic components on the base plate, and set up the metal shielding cover in electronic components's periphery, the metal shielding cover passes the mounting hole of base plate through fixed pin and bends the setting, in order to fix the metal shielding cover on the base plate, compare in welded fastening's scheme, the assembly is simple and convenient, the processing cost is low, and can save the assembly space, the metal shielding cover can play the radiation protection and the anti-interference effect of preferred, and then has protected stability and the security that the circuit board used.

In the circuit board, optionally, the metal shielding case includes a central plate and a plurality of side plates located around the central plate, the central plate is located at a top end of the metal shielding case, and the fixing pins are disposed on the side plates.

This arrangement provides a possible form of construction of the metal shielding can, which is simple and easy to implement.

Optionally, a plurality of heat dissipation holes are formed in the central plate and/or the side plate.

The radiating holes are used for facilitating the radiation of electronic components in the metal shielding case.

Optionally, the side plates are bent towards the same side of the central plate to form side walls arranged around the central plate, and a gap is formed between every two adjacent side walls.

The metal shielding cover is formed by bending a plate, is simple to process and low in cost, and a gap formed between the side walls is favorable for heat dissipation and almost has no influence on the shielding effect.

In the circuit board, optionally, the bending directions of the plurality of fixing pins are all toward the inside of the metal shielding case.

The arrangement is not only favorable for the appearance attractiveness, but also convenient for processing personnel to fix or remove.

Optionally, the width of the fixing pin is 2-6 mm.

The width range can avoid the fixed pin from interfering with the lead of the electronic component and the lead of the connected electronic component, and can ensure that the fixed pin has enough structural strength and the connection stability of the metal shielding cover and the substrate.

Optionally, a first preset distance is provided between the inner wall of the metal shielding case and the outer wall of the electronic component located inside the metal shielding case.

The first preset distance can avoid the problem that high current inside the electronic component is influenced by the metal shielding case to cause electric breakdown.

Optionally, a plurality of the electronic components are electrically connected through leads located on the second surface of the substrate, and a second preset distance is provided between the fixing pins and the wiring points of the electronic components and between the leads.

The setting of the second preset interval can avoid that the fixed pins influence the setting of the wiring points and the normal wiring process of the leads, and can avoid that the fixed pins and the wiring points or the leads are short-circuited, thereby ensuring the normal use of the circuit board.

Optionally, the metal shield is cupronickel; and/or the presence of a gas in the gas,

the inner wall of the metal shielding cover is covered with an insulating layer.

The metal shielding cover is made of the copper albedo, so that the metal shielding cover has the advantages of easiness in processing, low cost and good radiation protection and anti-interference effects. The insulating layer covers the inner wall of the metal shielding cover, so that the electric breakdown phenomenon can be effectively avoided, and the use safety of electronic components and circuit boards is effectively ensured.

In a second aspect, an embodiment of the present invention provides a household appliance, including the circuit board as described above.

The embodiment of the utility model provides a household appliance, through setting up electronic components on the base plate of household appliance's circuit board, and set up the metal shield cover in electronic components's periphery, the metal shield cover passes the mounting hole of base plate and bends the setting through fixed pin, in order to fix the metal shield cover on the base plate, compare in welded fastening's scheme, the assembly is simple and convenient, low in processing cost, and can save assembly space, the metal shield cover can play the radiation protection and the anti-interference effect of preferred, and then stability and the security that the circuit board used have been protected.

The structure of the present invention and other objects and advantages thereof will be more clearly understood from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a circuit board according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a circuit board according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a back structure of a circuit board according to an embodiment of the present invention.

Description of reference numerals:

100-a substrate;

11-a first surface;

12-a second surface;

13-mounting holes;

200-electronic components;

300-a metal shield;

31-a fixed pin;

32-a central plate;

33-side plate;

34-heat dissipation holes;

35-gap.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

Fig. 1 is the structure schematic diagram of the circuit board that the embodiment of the utility model provides, fig. 2 is the utility model provides a cross-sectional view of circuit board, fig. 3 is the utility model discloses the back structure schematic diagram of the circuit board that the embodiment provides, it is shown with reference to fig. 1 to fig. 3, the utility model provides a circuit board, include: the substrate 100 is provided with a first surface 11 and a second surface 12 which are oppositely arranged, the periphery of at least one electronic component 200 is covered with a metal shielding cover 300, the metal shielding cover 300 is located on the first surface 11, the bottom end of the metal shielding cover 300 is open, the edge of the opening is provided with a plurality of fixing pins 31, the substrate 100 is provided with a plurality of mounting holes 13 which are communicated with the first surface 11 and the second surface 12, and the fixing pins 31 penetrate through the mounting holes 13 and are bent and attached to the second surface 12.

The substrate 100 may be a printed circuit board PCB or a flexible printed circuit board FPC, and the material of the substrate 100 may be an inorganic material such as ceramic, a metal material such as copper, or a polymer material such as polyimide. The present embodiment does not impose any limitation on the material of the substrate 100, nor is it limited to the above examples.

The electronic components 200 disposed on the substrate 100 may include, but are not limited to, a capacitor, a diode, a triode, a resistor, a relay, a potentiometer, and the like, or an integrated circuit formed by the electronic components 200, and in actual use, a user may adjust a specific type and a connection manner of the electronic components 200 on the substrate 100 as needed, which is not limited in this embodiment.

Wherein, in the circuit board use, can produce interference and radiation between a plurality of electronic components 200, generally regard as the shield cover as setting up the metalwork among the prior art, the shield cover welds on the base plate to the cover is established in the electronic components outside, in order to play anti-interference and radiation protection's effect. However, the shield case is fixed on the substrate by welding, which not only complicates the process operation and increases the processing cost, but also requires a large operating space and high operation difficulty because the welding points and leads of the electronic components inside or around the shield case need to be prevented from being affected during welding.

In order to solve the above problem, in the present embodiment, the metal shielding can 300 is disposed outside the electronic component 200 and located on the first surface 11 of the substrate 100, a plurality of fixing pins 31 are disposed on the bottom opening of the metal shielding can 300, and the fixing pins 31 pass through the mounting holes 13 and are bent and attached to the second surface 12.

Specifically, the fixing pin 31 is disposed on the bottom opening of the metal shielding case 300, the fixing pin 31 is integrally formed with the metal shielding case 300, and the fixing pin 31 is easily bent when being stressed due to the small size of the fixing pin 31 and the elastic metal material.

When the metal shielding case 300 is mounted, the fixing pins 31 only need to be inserted into the mounting holes 13, and then the fixing pins 31 are bent on the second surface 12 of the substrate 100 by using a simple tool such as a wrench or a screwdriver, so that the mounting is simple and convenient, and the appearance is beautiful. When the metal shielding case 300 is disassembled, the fixing pin 31 is only required to be recovered to the original state from the bending state, and then taken out from the mounting hole 13, so that the metal shielding case 300 provided by the embodiment further has the advantages of convenience in disassembly, easiness in installation and maintenance.

In addition, fix metal shielding case 300 on base plate 100 through fixed pin 31, compare in the welded scheme, can avoid setting up the area that the welding point occupy base plate 100, be favorable to make full use of base plate 100 for hold more electronic components 200 in the available space.

The metal shielding case 300 is covered on the outer side of the electronic component 200, so that better anti-interference and radiation-proof effects can be achieved. Meanwhile, the metal shielding case 300 is not easy to burst, so that when the electronic component 200 inside the metal shielding case 300 is on fire, flame can be effectively prevented from spreading to cause adverse effects on the peripheral electronic component 200, and meanwhile, the adverse effects on the internal electronic component 200 caused by the high temperature of the electronic component 200 outside the metal shielding case 300 can also be prevented. The specific shape of the metal shielding case 300 is not particularly limited in this embodiment, and the metal shielding case 300 may have a circular shape, a square shape, or the like, and may satisfy the condition that the bottom end is open and the metal shielding case can be covered on the outer side of the electronic component 200.

In one possible embodiment, the metal shielding can 300 includes a central plate 32 and a plurality of side plates 33 disposed around the central plate 32, the central plate 32 is disposed at the top end of the metal shielding can 300, and the fixing pins 31 are disposed on the side plates 33.

At this time, the central plate 32 serves as a top of the metal shield 300, the side plate 33 serves as a sidewall of the metal shield 300, the metal shield 300 is formed as a case having an opening in one surface, an edge of the side plate 33 away from the central plate 32 forms the opening of the metal shield 300, the edge of the side plate 33 abuts on the first surface 11 of the substrate 100, and the fixing pin 31 is provided on the edge of the side plate 33 away from the central plate 32 so as to protrude into the mounting hole 13.

Furthermore, a plurality of heat dissipation holes 34 are formed on the central plate 32 and/or the side plate 33.

The metal shielding can 300 itself has good thermal conductivity, so that heat inside the metal shielding can 300 can be taken away more quickly. In order to further facilitate heat dissipation of the electronic component 200 in the metal shielding case 300, a plurality of heat dissipation holes 34 are further formed in the metal shielding case 300. When the diameter of the heat dissipation hole 34 is too large, the shielding effect of the metal shielding case 300 may be affected, and when the diameter of the heat dissipation hole 34 is too small, the heat dissipation and cooling effects may be affected, optionally, in this embodiment, the diameter of the heat dissipation hole 34 is 1.0-1.5 mm.

The side plates 33 are bent toward the same side of the center plate 32 to form side walls surrounding the center plate 32, and a gap 35 is formed between two adjacent side walls.

The metal shielding case 300 may be integrally formed by a process such as stamping or die casting, but the process is complicated and the manufacturing cost is high. In the present embodiment, the plurality of side plates 33 may be directly cut from a metal plate to form a shape that the side plates 33 are disposed around the central plate 32, and then the plurality of side plates 33 are bent toward the same side of the central plate 32, so that the side plates 33 form side walls that are approximately perpendicular to the central plate 32, and the side plates 33 and the central plate 32 together form the metal shielding case 300.

At this time, a gap 35 is formed between two adjacent sidewalls, and the size of the gap 35 is smaller, generally between 1mm and 2mm, so that the shielding effect of the metal shielding can 300 is not affected, and a certain heat dissipation effect can be achieved.

The plurality of fixing pins 31 are used for fixing the metal shielding case 300 on the substrate 100, and the plurality of fixing pins 31 are arranged along the circumferential direction of the metal shielding case 300, so that the fixing force of the fixing pins 31 is uniformly distributed.

With continued reference to fig. 3, in a preferred embodiment, the bending directions of the fixing pins 31 are all toward the inside of the metal shielding can 300. In this case, the fixing pins 31 are not only arranged in order in appearance and have high appearance, but also the fixing directions of the plurality of fixing pins 31 are uniform, which is convenient for a processing worker to bend the fixing pins 31 or remove the fixing pins 31.

When the width of the fixing pin 31 is too large, not only the electronic component 200 and the lead connecting the electronic component 200 are easily interfered, but also the bending difficulty is increased; when the width of the fixing pin 31 is too small, the structural strength is low, and the fixing pin 31 is easily deformed in the using process of the circuit board, so that the fixing function is lost. Thus, the width of the fixing pin 31 is optionally 2-6 mm.

Specifically, a first preset distance is provided between the inner wall of the metal shielding can 300 and the outer wall of the electronic component 200.

It should be noted that, when the electronic component 200 is in use, a large amount of current flows through the inside, and a first preset distance is reserved between the inner wall of the metal shielding case 300 and the outer wall of the electronic component 200, so that the problem that high current inside the electronic component 200 is affected by the metal shielding case 300 to cause electrical breakdown can be avoided, and the normal use of the electronic component 200 is ensured.

Meanwhile, the first preset interval can also be used as a normal assembly gap between the first preset interval and the second preset interval, the inner wall of the metal shielding cover 300 is prevented from extruding the electronic component 200 to affect the installation stability of the electronic component 200, the inner wall of the electronic component 200 can be prevented from abutting against the metal shielding cover 300, and the connection stability of the metal shielding cover 300 and the substrate 100 is ensured. The specific value of the first preset distance is not limited in this embodiment, and the user may set the first preset distance according to the volume of the electronic component 200 and the accommodating space of the circuit board.

Further, the plurality of electronic components 200 are electrically connected by leads located on the second surface 12 of the substrate 100, and the fixing pins 31 and the connection points and leads of the electronic components 200 have a second preset distance therebetween.

Each electronic component 200 generally all can be provided with the wiring point on the base plate 100, is connected through the lead wire electricity between a plurality of wiring points, and wiring point and lead wire generally set up on the second surface of base plate 100 to avoid it and electronic component 200 to influence each other, and can enlarge the space that sets up of lead wire, be convenient for the user sets up the lead wire structure of complicated circuit as required. The setting of the second preset interval can avoid that the fixed pin 31 influences the setting of wiring point and the normal process of walking the line of lead wire on the one hand, and on the other hand can avoid fixed pin 31 and wiring point or lead wire to take place the short circuit, guarantees the normal use of circuit board.

As an implementation, the metal shield 300 is cupronickel.

The metal shielding case 300 is made of a metal material, and can perform an electromagnetic shielding function. The metal shielding case 300 is made of cupronickel, and has strong advantages in material stretching and heat dissipation compared with materials such as tin-plated steel strips and stainless steel, and is easy to process and low in cost.

As an implementable embodiment, the inner wall of the metal shielding can 300 is covered with an insulating layer.

It should be noted that, because the electronic components 200 on the circuit board are densely arranged, and the internal current of the electronic components 200 is larger when the electronic components 200 work, so as to avoid the electrical breakdown of the electronic components 200 inside the metal shielding case 300 and the electronic components 200 outside the metal shielding case, or the electrical breakdown of the metal shielding case 300 and the electronic components 200 inside the metal shielding case, in this embodiment, an insulating layer is coated on the inner wall of the metal shielding case 300, and the insulating layer is used to block the movement of carriers between the electronic components 200 and the metal shielding case 300, thereby effectively avoiding the occurrence of the electrical breakdown phenomenon, and ensuring the safety of the use of the electronic components 200 and the circuit board.

Further, the insulating layer is coated on the inner wall surface of the metal shielding case 300, the insulating layer can be protected by the metal shielding case 300, and the insulating layer is prevented from being worn and failed after the circuit board is used for a long time. The insulating layer may be a pure inorganic coating, an organic coating, a semi-inorganic coating, or the like, such as a coating of phosphate, chromate, and latex resin, and the specific material of the insulating layer is not limited in this embodiment, and is not limited to the above examples.

Example two

The embodiment of the utility model provides a further aspect provides a household appliance, includes the circuit board as above embodiment.

Specifically, the household appliance may be an induction cooker, an electric kettle, an electric stewpot, a steamer, a dust collector, an air conditioner, a refrigerator, a television, a computer, and the like, and the present embodiment does not limit the specific kind of the household appliance.

Taking the electromagnetic oven as an example, the electromagnetic oven may include a bottom case and a panel disposed on the bottom case, an accommodating space is defined between the bottom case and the panel, and components such as the coil panel, the fan, and the circuit board in the first embodiment are disposed in the accommodating space. Electronic components on the circuit board are electrically connected with the coil panel and the fan, and provide electric signals for the limiting ring and the fan so as to control the use states of the limiting ring and the fan, and the use stability and the safety of the circuit board directly influence the use stability and the safety of the induction cooker.

The specific technical features of the circuit board are the same as those of the first embodiment, and the same technical effects can be achieved, which are not described in detail herein.

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

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; either directly or indirectly through intervening media, such as through internal communication or through an interaction between two elements. 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 disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A circuit board, comprising: a substrate (100) and a plurality of electronic components (200) arranged on the substrate (100),

the substrate (100) is provided with a first surface (11) and a second surface (12) which are oppositely arranged, at least one peripheral cover of the electronic component is provided with a metal shielding cover (300), the metal shielding cover (300) is located on the first surface (11), the bottom end of the metal shielding cover (300) is opened, the edge of the opening is provided with a plurality of fixed pins (31), the substrate (100) is provided with a plurality of installation holes (13) which are communicated with the first surface (11) and the second surface (12), and the fixed pins (31) penetrate through the installation holes (13) and are bent and attached to the second surface (12).

2. The circuit board of claim 1, wherein the metal shielding case (300) comprises a central plate (32) and a plurality of side plates (33) located around the central plate (32), the central plate (32) is located at the top end of the metal shielding case (300), and the fixing pins (31) are arranged on the side plates (33).

3. The circuit board of claim 2, wherein the central plate (32) and/or the side plate (33) have a plurality of heat dissipation holes (34).

4. The circuit board according to claim 2, wherein a plurality of the side plates (33) are bent toward the same side of the central plate (32) to form side walls surrounding the central plate (32), and a gap (35) is formed between two adjacent side walls.

5. The circuit board according to claim 1, wherein the bending directions of the plurality of fixing pins (31) are all towards the inside of the metal shielding case (300).

6. A circuit board according to claim 5, characterized in that the width of the fixing pin (31) is 2-6 mm.

7. The circuit board according to claim 1, wherein a first predetermined distance is provided between an inner wall of the metal shielding case (300) and an outer wall of the electronic component (200) located inside the metal shielding case (300).

8. The circuit board according to claim 7, wherein a plurality of the electronic components (200) are electrically connected by leads on the second surface (12) of the substrate (100), and the fixing pins (31) and the connection points of the electronic components (200) and the leads have a second predetermined spacing therebetween.

9. The circuit board of claim 1, wherein the metal shield (300) is cupronickel; and/or the presence of a gas in the gas,

the inner wall of the metal shielding cover (300) is covered with an insulating layer.

10. A domestic appliance comprising a circuit board according to any one of claims 1-9.