CN217522988U

CN217522988U - Circuit board, circuit board assembly and household appliance

Info

Publication number: CN217522988U
Application number: CN202220982566.9U
Authority: CN
Inventors: 管吉林; 郑书权
Original assignee: Shenzhen Topband Co Ltd
Current assignee: Shenzhen Topband Co Ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-09-30
Anticipated expiration: 2032-04-26

Abstract

The utility model is suitable for a circuit board technical field provides a circuit board, circuit board subassembly and domestic appliance, and the circuit board includes base plate, conductive jumper wire and insulating piece. The back of the substrate is provided with a first circuit and a second circuit which are independent and spaced from each other, and a first through groove is formed between the first circuit and the second circuit. The conductive jumper is arranged on the front face of the substrate and crosses the first through groove and the second circuit, and two ends of the conductive jumper penetrate through the substrate and are electrically connected with different circuits on the back face of the substrate respectively. The insulating sheet is arranged on the front surface of the substrate and is positioned below the conductive jumper, and the insulating sheet at least covers the overlapped area of the first through groove and the conductive jumper. So, the setting of insulating piece can shelter from the position that conducting jumper wire and first through groove correspond to carry out the insulation to the first circuit and the second circuit of conducting jumper wire and first through groove both sides and keep apart in order to avoid appearing the phenomenon of striking sparks effectively between conducting jumper wire and first circuit or the second circuit and lead to the device to damage.

Description

Circuit board, circuit board assembly and household appliance

Technical Field

The utility model relates to a circuit board technical field especially relates to a circuit board, circuit board components and domestic appliance.

Background

In the household electric appliances, a circuit board is generally provided and various electronic devices are provided on the circuit board, and at present, in a single-sided circuit board, the devices are generally arranged on the front side of the circuit board, and conductive traces are arranged on the back side of the circuit board. Due to layout limitations of devices, it is often encountered that circuits need to cross other lines, and in such cases, jumpers are usually used on the front side of the circuit board to cross the middle lines to achieve conduction between the lines on both sides.

In the related art, in order to satisfy the creepage distance between the lines, a slotting process is generally required between two lines, for example, a slot is generally required to separate the lines connected with three pins of an IGBT module on a circuit board of an electric appliance such as an induction cooker and an electromagnetic cooking rice cooker to satisfy the creepage distance between a high voltage pin and a ground pin and a driving pin, and when a jumper crosses the slots, the creepage distance between the jumper and some lines on the back surface (for example, lines connected with the high voltage pin of the IGBT module) is small, and a sparking phenomenon is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides a circuit board, circuit board subassembly and domestic appliance aims at solving the technical problem of wire jumper on the circuit board among the prior art the fluting on strideing across the circuit board and the phenomenon of striking sparks appears easily between the circuit at the back.

The utility model discloses a realize like this, the utility model discloses circuit board includes:

the circuit board comprises a substrate, wherein a first circuit and a second circuit which are independent and spaced are arranged on the back surface of the substrate, and a first through groove is formed between the first circuit and the second circuit;

the conductive jumper is arranged on the front surface of the substrate and crosses over the first through groove and the second circuit, and two ends of the conductive jumper penetrate through the substrate and are respectively electrically connected with different circuits on the back surface of the substrate; and

the insulating sheet is arranged on the front face of the base plate and located below the conducting jumper, and at least covers the area where the first through groove and the conducting jumper are overlapped.

Further, the insulation sheet completely covers the first through groove.

Further, the insulation sheet comprises a silicone sheet.

Furthermore, the conductive jumper wire abuts against and presses the insulating sheet.

Furthermore, the conductive jumper comprises a connecting section, a first bending section and a second bending section, wherein the first bending section and the second bending section are connected to two ends of the connecting section, the connecting section and the substrate are arranged at intervals and oppositely, the first bending section and the second bending section are bent towards one side of the substrate relative to the connecting section and penetrate through the substrate to be connected with two different lines, and the connecting section spans over the first through groove and the second line;

the insulation sheet at least covers an overlapping area of the connecting section and the first through groove and avoids the first bending section and the second bending section; or

The insulating piece covers completely the conducting jumper wire, first bending section with the second bending section all wears to establish the insulating piece with the base plate.

Furthermore, an insulator is arranged on the conductive jumper, and the insulator at least covers the region, overlapped with the first through groove, of the conductive jumper.

Furthermore, the back of the substrate is further provided with a third circuit, the first circuit, the second circuit and the third circuit are sequentially arranged at intervals, a second through groove is formed between the third circuit and the second circuit, the conducting jumper wire further crosses over the second through groove and the third circuit, and the insulating sheet further at least covers an area where the conducting jumper wire and the second through groove are overlapped.

The utility model also provides a circuit board assembly, circuit board assembly includes:

the circuit board of any of the above; and

the power device is arranged on the front surface of the substrate, and pins of the power device penetrate through the substrate and are at least electrically connected with the first circuit and the second circuit.

Furthermore, a control module is arranged on the substrate, the power device comprises an IGBT module, the first circuit is connected with a driving pin of the IGBT module, the second circuit is connected with a high-voltage pin of the IGBT module, and two ends of the conductive jumper wire are respectively connected with the first circuit and a driving circuit of the control module, wherein the driving circuit is used for driving the IGBT module.

The utility model also provides a domestic appliance, domestic appliance includes above-mentioned arbitrary circuit board assembly.

The utility model discloses the beneficial effect who reaches is:

the conductive jumper is arranged on the front face of the base plate and crosses over the first through groove, two ends of the conductive jumper penetrate through the base plate and are electrically connected with different circuits respectively, and the insulating sheet is located below the conductive jumper and at least covers an area where the first through groove and the conductive jumper are overlapped. Therefore, the position of the conductive jumper wire corresponding to the first through groove can be shielded by the insulating sheet, and the first line and the second line on two sides of the conductive jumper wire and the first through groove are insulated and isolated so as to effectively avoid the phenomenon of sparking between the conductive jumper wire and the first line or the second line and further damage a device.

Drawings

Fig. 1 is a schematic structural diagram of a household appliance provided by the present invention;

fig. 2 is a schematic structural diagram of a circuit board assembly provided by the present invention;

fig. 3 is a schematic structural diagram of a circuit board provided by the present invention;

fig. 4 is a schematic front structural view of a circuit board assembly provided by the present invention;

fig. 5 is a schematic back structural view of the circuit board assembly provided by the present invention;

fig. 6 is a schematic cross-sectional view of a circuit board provided by the present invention;

fig. 7 is another schematic cross-sectional view of the circuit board according to the present invention.

Description of the main element symbols:

the circuit board assembly comprises a household appliance 1000, a circuit board assembly 100, a circuit board 10, a substrate 11, a front surface 111, a back surface 112, a first circuit 121, a second circuit 122, a first through groove 123, a third circuit 124, a second through groove 125, a driving circuit 126, a sampling circuit 127, a conductive jumper 13, a connecting section 131, a first bent section 132, a second bent section 133, a first conductive jumper 134, a second conductive jumper 135, an insulating sheet 14, a current sampling resistor 15, an insulator 16, a power device 20, an IGBT module 21 and a rectification module 30;

coil panel 200, housing 300.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention. Furthermore, it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. 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 "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply 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.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize that other processes may be used and/or other materials may be used.

In the prior art, in order to meet the creepage distance between each line, a slotting process is generally required between two lines, for example, a slot is generally required to be separated between lines connected with three pins of an IGBT module on a circuit board of an electric appliance such as an induction cooker, an electromagnetic cooking rice cooker and the like so as to meet the creepage distance between a high-voltage pin and a grounding pin and a driving pin, and when a jumper crosses the slots, the creepage distance between the jumper and some lines on the back surface (for example, lines connected with the high-voltage pin of the IGBT module) is small, so that a sparking phenomenon is easy to occur.

The utility model discloses in, the setting of insulating piece 14 can shelter from the position that conducting jumper 13 and first through groove 123 correspond to carry out the insulation to conducting jumper 13 and first circuit 121 and the second circuit 122 of first through groove 123 both sides and keep apart in order to avoid appearing the phenomenon of striking sparks effectively between conducting jumper 13 and first circuit 121 or the second circuit 122 and lead to the technical problem that the device damaged.

Example one

Referring to fig. 1, the household electrical appliance 1000 of the present invention may include the circuit board assembly 100 of the present invention, and the household electrical appliance 1000 may be a cooking appliance such as an induction cooker, an electromagnetic cooking rice cooker, etc. The circuit board assembly 100 may include the circuit board 10 of the embodiment of the present application and the power device 20 disposed on the circuit board 10.

Taking an induction cooker as an example, the power device 20 may be an IGBT module 21 of the induction cooker, and the household appliance 1000 may further include a housing 300, and the circuit board assembly 100 may be mounted in the housing 300, for example, a mounting bracket (not shown) may be provided in the housing 300, and a circuit of the circuit board assembly 100 may be mounted on the mounting bracket.

Referring to fig. 2-6, a circuit board 10 according to an embodiment of the present invention may include a substrate 11, a conducting jumper 13, and an insulating sheet 14.

The back surface 112 of the substrate 11 is provided with a first circuit 121 and a second circuit 122 which are independent and spaced from each other, and a first through groove 123 is opened between the first circuit 121 and the second circuit 122. The conductive jumper 13 is disposed on the front surface 111 of the substrate 11 and crosses the first through groove 123 and the second line 122, and both ends of the conductive jumper 13 penetrate the substrate 11 and are electrically connected to different lines on the back surface 112 of the substrate 11. The insulation sheet 14 is disposed on the front surface 111 of the substrate 11 and below the conductive patch 13, and the insulation sheet 14 covers at least an area where the first through groove 123 overlaps the conductive patch 13. The power device 20 may be mounted on the front surface 111 of the substrate 11 and electrically connected to at least the second circuit 122, and the pins of the power device 20 penetrate through the substrate 11 and electrically connected to at least the first circuit 121 and the second circuit 122.

The utility model discloses in circuit board 10, circuit board assembly 100 and domestic appliance 1000 of embodiment, electrically conductive wire jumper 13 sets up at the front 111 of base plate 11 and strides first through groove 123, and electrically conductive wire jumper 13's both ends all run through base plate 11 and respectively with different circuit electric connection, insulating piece 14 is located electrically conductive wire jumper 13 below and covers the region that first through groove 123 and electrically conductive wire jumper 13 overlap at least. Therefore, the insulating sheet 14 can shield the position of the conducting jumper 13 corresponding to the first through groove 123, so as to insulate and isolate the first circuit 121 and the second circuit 122 on two sides of the conducting jumper 13 and the first through groove 123, thereby effectively preventing the conducting jumper 13 from being damaged by the occurrence of the arcing phenomenon between the first circuit 121 and the second circuit 122.

In addition, it can be understood that, because the thickness of the circuit board is generally thin, if the jumper wire is not insulated and isolated, the creepage distance between the jumper wire and the back strong electricity cannot be met, and the sparking phenomenon is easily caused. In the related art, in order to avoid this phenomenon, the electrical isolation is usually realized by applying the insulating glue to the jumper after the jumper is installed, however, in such a manner, the phenomenon of missing applying the insulating glue is caused by applying the insulating glue, and accurate alignment is required to apply the insulating glue after the jumper is installed, so that the production efficiency is low.

The utility model discloses in, only need paste insulating piece 14 in the position that corresponds on base plate 11, the direct mount wire jumper can realize conductive jumper 13 afterwards and the insulation of first circuit 121 and second circuit 122 is kept apart with effectual phenomenon of striking sparks of avoiding, and the production efficiency assembly is higher.

It should be noted that two different lines are respectively connected to two ends of the conducting jumper 13, that is, the conducting jumper 13 may have one end connected to the first line 121 and the other end connected to another line, or may have two ends connected to a line other than the first line 121 and the second line 122, for example, in the example shown in fig. 6, one end of the conducting jumper 13 is connected to the first line 121, and the other end is connected to a line other than the second line 122, which is not limited herein.

It should be noted that, in this document, the "area where the first through groove 123 overlaps the conductive jumper 13" may be understood as an overlapping area between an orthographic projection of the first through groove 123 on the substrate 11 and an orthographic projection of the conductive jumper 13 on the substrate 11, and the "insulating sheet 14 covers at least the area where the first through groove 123 overlaps the conductive jumper 13" may be understood as that the insulating sheet 14 just covers the overlapping area, or may cover other areas besides the overlapping area, and is not limited herein, and the conductive jumper 13 and the first line 121 and the second line 122 may be effectively insulated and isolated as long as the insulating sheet 14 covers at least the overlapping area.

It is understood that, in order to improve the reliability of insulation, the area of the insulation sheet 14 is generally set to be larger than the overlapping area of the conductive jumper 13 and the first through groove 123. Specifically, the width of the first through slot 123 may be set to be 1.5mm, and the width of the insulation sheet 14 may be set to be slightly larger than 1.5mm or even larger, which is not limited herein.

Referring to fig. 2 and 4, in some embodiments, the substrate 11 may further include a control module (not shown), for example, a microprocessor such as a single chip microcomputer, the power device 20 may be an IGBT module 21, taking an induction cooker as an example, the IGBT module 21 may be configured to control a resonant module formed by a coil panel 200 of the induction cooker and a resonant circuit to work so as to implement electromagnetic heating, and the IGBT module 21 may include three pins, which may be a high voltage pin 211 located in the middle, a driving pin 212 located on both sides of the high voltage end, and a ground pin 213.

In the example shown in fig. 4 and 5, the first line 121 is connected to the driving pin 212 of the IGBT module 21, the second line 122 is connected to the high voltage pin 211 of the IGBT module 21, and both ends of the conducting jumper 13 are respectively connected to the first line 121 and the driving circuit 126 of the control module for driving the IGBT module 21.

That is to say, the second line 122 is a high-voltage line, that is, a strong-current line, the second line 122 is provided with a pad welded to the high-voltage pin 211 of the IGBT module 21, the first line 121 is a driving line for driving the IGBT module 21, that is, a weak-current line, the first line 121 is provided with a pad welded to the driving pin 212 of the IGBT module 21, the conducting jumper 13 is the driving circuit 126 for connecting the driving pin 212 of the IGBT module 21 and the control module, and the control module transmits a driving signal to the IGBT module 21 through the first line 121 and the conducting jumper 13 to drive the IGBT module 21 to operate.

Under the condition, the first circuit 121 and the conducting jumper 13 are usually weak current circuits, the second circuit 122 is a strong current circuit, the first through groove 123 is formed to increase the creepage distance between the first circuit 121 and the second circuit 122 so as to meet the requirement, and the insulating sheet 14 is arranged in the area where the first through groove 123 and the conducting jumper 13 are overlapped so as to separate the conducting jumper 13 from the second circuit 122 so as to meet the insulating separation between the front weak current and the back strong current, so that the sparking phenomenon between the front weak current and the back strong current is effectively avoided.

In addition, referring to fig. 4, in some embodiments, the circuit board assembly 100 may further include a heat sink 40, the heat sink 40 may be mounted on the substrate 11, the IGBT module 21 and the rectifier module 30 may be mounted on the heat sink 40 and thermally connected to the heat sink 40, and a fan may be further disposed in the housing 300 of the household appliance 1000, and the fan is configured to generate an air flow flowing through at least the heat sink 40 to dissipate heat of the IGBT module 21 and the rectifier module 30 to solve the temperature rise problem.

Referring to fig. 3 and fig. 5, in some embodiments, the back surface 112 of the substrate 11 is further provided with a third circuit 124, the first circuit 121, the second circuit 122 and the third circuit 124 are sequentially arranged at intervals, a second through groove 125 is formed between the third circuit 124 and the second circuit 122, the conductive patch 13 further crosses the second through groove 125 and the third circuit 124, and the insulating sheet 14 further covers at least an area where the conductive patch 13 overlaps the second through groove 125.

In this way, the insulating sheet 14 also covers the second through groove 125, so as to effectively prevent the conductive jumper 13 from sparking between the second line 122 and the third line 124.

Specifically, in such an embodiment, the third line 124 may be a line connected to the ground pin 213 of the IGBT module 21, that is, a ground line, and the conductive jumper 13 may cross over the third line 124. More specifically, as shown in fig. 4 and 5, a current sampling resistor 15 may be disposed on the front surface 111 of the substrate 11, and both ends of the current sampling resistor 15 may penetrate through the substrate 11 and be connected to pads on the back surface 112 of the substrate 11.

Taking the induction cooker as an example, in some embodiments, as shown in fig. 3 to fig. 5, the number of the conducting jumpers 13 is two, which are respectively a first conducting jumper 134 and a second conducting jumper 135, two ends of the first conducting jumper 134 are respectively connected to a pad on the first line 121 and a pad on the driving circuit 126 of the control module, the first conducting jumper 134 sequentially crosses the first through slot 123, the second line 122, the second through slot 125, and the third line 124, one end of the second conducting jumper 135 is connected to the line 128 connected to the pad of the current sampling resistor 15, and the other end is connected to the current sampling circuit 127 of the control module.

Similarly, it should be noted that, in this document, "the area where the second through groove 125 overlaps the conducting jumper 13" may be understood as an overlapping area between the orthographic projection of the second through groove 125 on the substrate 11 and the orthographic projection of the conducting jumper 13 on the substrate 11, "the insulating sheet 14 also covers at least the area where the conducting jumper 13 overlaps the second through groove 125" may be understood as that the insulating sheet 14 just covers the overlapping area, and may also cover other areas besides the overlapping area, which is not limited herein, and only the insulating sheet 14 needs to cover this area to perform effective insulation isolation on the conducting jumper 13.

In some embodiments, the insulating sheet 14 may be directly attached to the circuit board 10, for example, the attaching may be achieved by a back adhesive on the insulating sheet 14, and of course, the specific installation manner is not limited herein, and only the insulating sheet 14 needs to be stably fixed on the substrate 11.

Further, in some embodiments, the insulating sheet 14 may comprise a silicone sheet. So, the insulating properties of silica gel piece is better, can effectually realize keeping apart the insulation of electrically conductive wire jumper 13, and simultaneously, the manufacturing cost and the material cost of silica gel piece are also lower, can effectual reduce cost. It is understood, of course, that in other embodiments, other materials may be used to form the insulating sheet 14, and that the present invention is not limited thereto,

example two

Further, in some embodiments, the insulation sheet 14 may completely cover the first through groove 123.

Thus, the insulation sheet 14 can completely cover the first through groove 123 to provide more excellent insulation, and at the same time, the insulation sheet 14 can be prevented from being too small to cause difficulty in manufacturing and difficulty in mounting.

In addition, in such an embodiment, the insulation sheet 14 may also completely cover the second through groove 125 at the same time, that is, the same insulation sheet 14 may be used to cover and shield the first through groove 123 and the second through groove 125. It will be appreciated that, in order to increase the efficiency of the installation, in the illustrated embodiment, the insulating sheet 14 may also cover the area between the first and second through

slots

123, 125 completely at the same time. Of course, it is understood that in other embodiments, only the first through groove 123, the second through groove 125 and a small portion of the area therebetween may be covered, and the embodiment is not limited herein.

EXAMPLE III

Referring to fig. 6, in some embodiments, the conductive jumper 13 presses and presses the insulation sheet 14.

As such, the conducting jumper 13 may compress the insulation sheet 14 such that the insulation sheet 14 is tightly stuck between the conducting jumper 13 and the base plate 11 to increase the installation stability of the insulation sheet 14 to prevent the insulation sheet 14 from falling. Specifically, as shown in fig. 3, the first and second conductive jumper wires 134 and 135 each press against and press the insulating sheet 14 to fix the insulating sheet 14.

Further, referring to fig. 6, in some embodiments, the conducting jumper 13 may include a connection section 131, and a first bending section 132 and a second bending section 133 connected to two ends of the connection section 131, where the connection section 131 is disposed opposite to the substrate 11 at a distance, the first bending section 132 and the second bending section 133 are both bent toward one side of the substrate 11 relative to the connection section 131 and penetrate through the substrate 11 to connect with two different lines, and the connection section 131 crosses over the first through groove 123 and the second line 122;

the insulating sheet 14 covers an overlapping area of the connecting section 131 and the first through groove 123 and is free from the first bent section 132 and the second bent section 133.

Thus, the first bent end and the second bent end are arranged at the two ends of the connecting section 131 of the conducting jumper 13, so that the two ends of the conducting jumper 13 can reliably penetrate through the substrate 11 to be electrically connected with different circuits respectively, meanwhile, the connecting section 131 crosses over the insulating sheet 14 and the first through groove 123, the insulating sheet 14 only needs to cover the overlapping area of the connecting section 131 and the first through groove 123, the insulating sheet 14 does not need to be covered at the position corresponding to the first bent section 132 and the second bent section 133, and the use of the insulating sheet 14 is reduced to reduce the cost.

Specifically, in such an embodiment, the connecting section 131 may be pressed against the insulating sheet 14 to achieve fixation of the insulating sheet 14. The substrate 11 may be provided with corresponding via holes, and the first bending section 132 and the second bending section 133 may be soldered to different circuits on the back surface 112 of the substrate 11 after passing through the via holes, respectively, to achieve electrical connection. More specifically, in the present embodiment, the connecting segment 131 may be disposed substantially parallel to the substrate 11, but of course, the connecting segment 131 may also be in an arc shape, and the first bending segment 132 and the second bending end may be disposed perpendicular to the connecting segment 131, which is not limited herein. Furthermore, in such an embodiment, the connecting section 131 also spans the second through slot 125.

Furthermore, it is understood that in some embodiments, the insulation sheet 14 may also cover the entire conductive jumper 13, and the first bent section 132 and the second bent section 133 are both disposed through the insulation sheet 14 and the base plate 11. As such, the first bent section 132 and the second bent section 133 can position and fix the insulating sheet 14 so as to ensure the stability of fixing the insulating sheet 14.

Specifically, under such a condition, through holes may be formed in the positions of the insulating sheet 14 corresponding to the first bending section 132 and the second bending section 133, and the first bending section 132 and the second bending section 133 penetrate through the through holes on the insulating sheet 14 and the substrate 11 and are then respectively connected to different circuits, so that the insulating sheet 14 can be further effectively prevented from falling off by the first bending section 132 and the second bending section 133 penetrating through the insulating sheet 14.

Example four

Referring to fig. 7, in the present embodiment, an insulator 16 may be disposed on the conducting jumper 13, and the insulator 16 at least covers a region of the conducting jumper 13 overlapping with the first through groove 123.

Thus, the insulating layer 16 is coated on the conducting jumper 13 to further improve the insulating property of the conducting jumper 13, so as to more effectively avoid the sparking phenomenon.

Specifically, in such an embodiment, the insulating body 16 may be an insulating gel or an insulating gel cover, and the insulating body 16 may be covered on the conducting jumper 13 or the insulating body 16 may be formed on the conducting jumper 13 by injection molding, and then the conducting jumper 13 may be mounted on the substrate 11. It is understood that in such an embodiment, the insulator 16 may only cover the connection segment 131 of the conducting jumper 13, or may completely cover the whole conducting jumper 13 and only expose both ends of the conducting jumper 13, which is not limited herein. Of course, it is understood that the insulator 16 may be provided to wrap the overlapping area of the conductive jumper 13 corresponding to the second through groove 125, as shown in fig. 7.

In the description herein, references to the description of the terms "some embodiments," "exemplary embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. A circuit board, comprising:

the conductive jumper wire is arranged on the front surface of the substrate and spans the first through groove and the second circuit, and two ends of the conductive jumper wire penetrate through the substrate and are respectively and electrically connected with different circuits on the back surface of the substrate; and

the insulating piece, the insulating piece sets up the front of base plate just is located the conducting jumper wire below, the insulating piece covers at least first through groove with the region that the conducting jumper wire overlaps.

2. The circuit board of claim 1, wherein the insulation sheet completely covers the first through groove.

3. The circuit board of claim 1, wherein the insulating sheet comprises a silicone sheet.

4. The circuit board of claim 1, wherein the conductive jumper abuts and compresses the insulating sheet.

5. The circuit board according to claim 1, wherein the conductive jumper comprises a connecting section and a first bending section and a second bending section connected to two ends of the connecting section, the connecting section is arranged opposite to the substrate at a certain interval, the first bending section and the second bending section are both bent towards one side of the substrate relative to the connecting section and penetrate through the substrate to be connected with two different lines, and the connecting section spans over the first through groove and the second line;

the insulation sheet covers an overlapping area of the connecting section and the first through groove and avoids the first bending section and the second bending section; or

6. The circuit board of claim 1, wherein the conductive jumper wire is provided with an insulator, and the insulator covers at least a region of the conductive jumper wire overlapping with the first through groove.

7. The circuit board according to claim 1, wherein a third circuit is further disposed on the back surface of the substrate, the first circuit, the second circuit and the third circuit are sequentially arranged at intervals, a second through slot is formed between the third circuit and the second circuit, the conductive jumper wire further crosses over the second through slot and the third circuit, and the insulating sheet further covers at least an area where the conductive jumper wire overlaps with the second through slot.

8. A circuit board assembly, comprising:

the circuit board of any one of claims 1-7; and

the power device is arranged on the front face of the substrate, and pins of the power device penetrate through the substrate and are at least electrically connected with the first circuit and the second circuit.

9. The circuit board assembly according to claim 8, wherein a control module is disposed on the substrate, the power device includes an IGBT module, the first line is connected to a driving pin of the IGBT module, the second line is connected to a high voltage pin of the IGBT module, and two ends of the conducting jumper are respectively connected to the first line and a driving circuit of the control module for driving the IGBT module.

10. A domestic appliance comprising a circuit board assembly according to any one of claims 8-9.