Support plate for placing printed circuit board, electronic assembly structure and electric tool

Abstract

The utility model discloses a support plate used for placing a printed circuit board, an electronic assembly structure and an electric tool, the surface used for placing the printed circuit board is provided with an insulation rib plate (302) extending in the height direction, and the insulation rib plate forms a safe insulation distance between electronic elements of the printed circuit board. The supporting plate for placing the printed circuit board is matched with a printed circuit board assembly, the size of the printed circuit board in the height direction can be reduced, and meanwhile the requirement for the insulation distance can be met.

Description

Technical Field

[0001] The utility model relates to an electronic component structure, in particular to an electronic component structure accommodated in a small space housing. Background Art

[0002] When designing and manufacturing power tools, the circumference of the gripping area is critical to ensure that the user can comfortably hold and operate the tool.

[0003] However, in some power tool structures, the printed circuit board is usually located below the gripping position. At the same time, in order to drive a higher power motor, the outline size of the printed circuit board will be large, which means that the size of the printed circuit board will directly affect the size of the gripping area of ​​the power tool.

[0004] In addition, a variety of electronic components are often soldered on the printed circuit board. In order to achieve high-power output, the size of these electronic components is often larger, which in turn causes the size of the printed circuit board to increase in the height direction. The increased size of the printed circuit board and electronic components significantly increases the circumference of the power tool's grip area, increasing the difficulty of the user's grip and reducing the user's experience. Utility Model Content

[0005] One of the purposes of the present invention is to provide a support plate for placing a printed circuit board, which cooperates with a printed circuit board assembly to reduce the size of the printed circuit board in the height direction while meeting the insulation distance requirements.

[0006] In order to achieve the above-mentioned purpose, the utility model proposes a support plate for placing a printed circuit board, which has an insulating rib extending in the height direction on the surface for placing the printed circuit board, and the insulating rib forms a safe insulation distance between the electronic components of the printed circuit board and / or the charged bodies of the electronic components.

[0007] Furthermore, in the support plate described in the present invention, the support plate has a plurality of recessed portions on the surface for placing the printed circuit board, and the recessed portions are used to accommodate the pins of the electronic components passing through the printed circuit board, and the insulating ribs are provided between adjacent recessed portions.

[0008] Furthermore, in the support plate described in the present invention, the insulating rib plate has an arm extending in the horizontal direction in the middle portion in the height direction, and the upper surface of the arm is used to support the printed circuit board.

[0009] Furthermore, in the support plate described in the present invention, the insulating rib plate and the support plate are integrally formed.

[0010] Furthermore, in the support plate described in the present invention, the insulating rib plate and the support plate are connected by interference fit.

[0011] Another object of the present invention is to provide an electronic component structure that can reduce the height size of the printed circuit board while meeting the insulation distance requirements, thereby providing the possibility of reducing the size of the gripping area of ​​the power tool while ensuring electrical reliability and safety.

[0012] Based on the above objectives, the present invention further provides an electronic component structure, which includes:

[0013] A printed circuit board having a first surface and a second surface facing away from each other, wherein the printed circuit board has pin mounting holes and insulating rib holes;

[0014] At least one electronic component having a body and at least two pins extending from the body, each of the pins including an upper pin relatively close to the body of the electronic component, the body being disposed on one side of the first surface of the printed circuit board, the upper pins passing through pin mounting holes on the printed circuit board and being soldered to the printed circuit board;

[0015] The support plate has an insulating rib extending in a height direction toward the second surface of the printed circuit board. The insulating rib is arranged between adjacent upper pins to form a safe insulation distance between the upper pins.

[0016] Furthermore, in the electronic component structure described in the present invention, the support plate further has a plurality of recessed portions, and the lower ends of the upper pins are correspondingly accommodated in the respective recessed portions.

[0017] Furthermore, in the electronic component structure described in the present invention, the insulating rib has an arm extending in the horizontal direction in the middle portion in the height direction, and the upper surface of the arm is in supporting contact with the second surface of the printed circuit board.

[0018] Furthermore, in the electronic component structure described in the present invention, the printed circuit board has an insulating rib hole, and the upper end of the insulating rib is arranged in the insulating rib hole of the printed circuit board.

[0019] Furthermore, in the electronic assembly structure described in the present invention, the electronic element is an IGBT.

[0020] Furthermore, in the electronic component structure described in the present invention, the insulating rib plate and the support plate are integrally formed.

[0021] Furthermore, in the electronic component structure described in the present invention, the insulating rib plate and the support plate are connected by interference fit.

[0022] The utility model discloses still another purpose in providing a kind of electric tool of safe and stable operation, hold comfortable.

[0023] Based on the above purpose, the utility model further provides an electric tool, the inside of the holding area of its shell is equipped with the electronic component structure as described above.

[0024] The electronic component structure can reduce the size of the electronic components in the height direction, while also meeting the requirements of electronic component insulation distance.

[0025] The electric tool is safe and stable in operation, comfortable to hold, and has excellent user experience performance. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The size of the electronic component on the holding area size of the shell of the electric tool is schematically shown.

[0027] Figure 2 An electronic component with a pin is shown.

[0028] Figure 3 The influence of using lower pin and printed circuit board welding connection and using upper pin and printed circuit board connection on printed circuit board assembly height is schematically and contrastively shown.

[0029] Figure 4 The influence of using lower pin and printed circuit board welding connection and using upper pin and printed circuit board connection on insulation distance is schematically and contrastively shown.

[0030] Figure 5 Part shows the structure of the support plate in one embodiment of the utility model.

[0031] Figure 6 The split structure schematic diagram of the electronic component structure in one embodiment of the utility model is partially shown from the perspective of cross section.

[0032] Figure 7 The assembly state of the electronic component structure in one embodiment of the utility model is shown.

[0033] Figure 8 The structure of the printed circuit board in one embodiment of the utility model is partially shown from the perspective of top view.

[0034] Figure 9 The insulation distance of the electronic component structure in the utility model is schematically shown. DETAILED DESCRIPTION

[0035] The support plate, electronic component structure and electric tool described in the present invention will be further explained and illustrated below in conjunction with the drawings and specific embodiments of the specification. However, such explanation and illustration do not constitute an undue limitation on the technical solution of the present invention.

[0036] like Figure 1 As shown, the circumference of the gripping area of ​​the power tool housing will be affected by the electronic components arranged inside. For example, the printed circuit board (PCBA) is usually located below the gripping position. However, on the other hand, the current development trend of power tools is that in order to drive higher power motors, the outline size of the printed circuit board is getting larger and larger. At the same time, in order to achieve high-power output, the size of the electronic components soldered on the printed circuit board, such as IGBT, is also getting larger and larger, which in turn will cause the size of the printed circuit board in the height direction to increase. The increased size of the printed circuit board and electronic components makes the circumference of the gripping area of ​​the power tool increase significantly, which increases the difficulty of the user's grip and reduces the user experience.

[0037] Electronic components are placed on printed circuit boards through pins. Figure 2 As shown, an electronic component 100, such as an IGBT, has a body 103 and pins extending from the body for electrical connection. The pins relatively close to the body 103 are called upper pins 101, and the pins relatively far from the body 103 are called lower pins 102. In order to reduce the height of the electronic component on the printed circuit board, as shown in FIG. Figure 3 As shown, the solder connection point between the printed circuit board 200 and the electronic component can be connected from the lower pin ( Figure 3 The right side of the ) becomes the upper pin ( Figure 3 on the left side of the ).

[0038] However, if Figure 4 As shown, the welding position at the upper pin 101 will cause the insulation distance L2 between the pins to be shorter than the insulation distance L1 when the welding position is at the lower pin 102 (for example, the insulation distance is less than 2 mm), resulting in the insulation distance not meeting the safety insulation distance required by the safety specifications of electronic components, and the stability and safety of the product cannot be guaranteed.

[0039] In order to solve the above problems, the present invention provides, in one embodiment, a support plate for placing a printed circuit board.

[0040] Figure 5 Part shows a schematic structural diagram of the support plate described in the present invention in one embodiment.

[0041] like Figure 5As shown, the support plate 300 has an insulating rib 302 extending in the height direction on the surface for placing the printed circuit board. The insulating rib 302 is used to be arranged between the electronic components of the printed circuit board and / or the charged bodies of the electronic components, thereby increasing the insulation distance between the charged bodies to form a safe insulation distance.

[0042] In this utility model, "safe insulation distance" refers to the spatial distance that should be maintained between charged parts to prevent insulation failure. It includes electrical clearance, creepage distance, and insulation penetration distance. For each electronic component, the corresponding safety regulations generally specify the required safe insulation distance. For example, in one specific example, the safe insulation distance is 2 mm.

[0043] In some more specific embodiments, the insulating rib 302 further has an arm 3021 extending in the horizontal direction in the middle of the height direction, and the upper surface of the arm 3021 is used to support the printed circuit board.

[0044] In some more specific embodiments, the insulating ribs 302 may be integrally formed with the support plate 300 to provide structural integrity.

[0045] In other embodiments, the insulating ribs 302 may be provided separately from the support plate 300, and then connected to the support plate. For example, in more specific embodiments, the insulating ribs 302 may be tightly inserted into the support plate through an interference fit, and separate the recesses 301.

[0046] In some embodiments, the support plate 300 may further include a plurality of recesses 301 , each recess 301 being configured to accommodate a pin of an electronic component passing through the printed circuit board. In addition, insulating ribs 302 are disposed between adjacent recesses 301 .

[0047] In another embodiment, the present invention further provides an electronic component structure having the above-mentioned support plate.

[0048] Figure 6 A schematic diagram of the split structure of the electronic component structure of the present invention in one embodiment is partially shown from a cross-sectional perspective.

[0049] Figure 7 The figure shows the assembly state of the electronic component structure described in the present invention in one embodiment.

[0050] like Figure 6 and Figure 7 As shown, in some embodiments, the electronic component structure may include:

[0051] The printed circuit board 200 has a first surface 203 and a second surface 204 facing away from each other. Figure 8 As shown, the printed circuit board 200 is provided with pin mounting holes 201 for allowing the pins of the electronic components to pass through.

[0052] At least one electronic component 100 includes a body 103 and at least two pins extending from the body, including an upper pin 101 positioned relatively close to the body 103 of the electronic component. The body 103 is positioned on a side of a first surface 203 of a printed circuit board (PCB). The upper pin 101 extends through a pin mounting hole 201 on the PCB and is soldered to the PCB.

[0053] The support plate 300 is arranged near the second surface 204 of the printed circuit board 200, and has an insulating rib 302 extending in the height direction toward the second surface 204 of the printed circuit board. The insulating rib 302 is arranged between adjacent upper pins 101, thereby forming a safe insulation distance between the upper pins.

[0054] In this way, the electronic component 100 is soldered to the printed circuit board 200 via the upper pins 101, which reduces the height of the entire electronic component structure compared to soldering to the printed circuit board via the lower pins, thereby providing a basis and support for reducing the circumference of the gripping area of ​​the power tool. Figure 9 As shown, according to electrical principles, the insulation distance between the pins is increased to the sum of L3, L4 and L5. In a specific example, it reaches 3.15 mm, which greatly increases the insulation distance and can meet the safety insulation distance required by the safety specifications of electronic components (for example, 2 mm), thereby ensuring the stability and safety of the product.

[0055] Therefore, the use of the present invention can reduce the height dimension of the electronic component structure while ensuring that the insulation distance of the electronic component meets the safety specification requirements.

[0056] Furthermore, in some embodiments, Figure 6 and Figure 7 As shown, the surface of the support plate 300 for placing the printed circuit board can also be provided with a plurality of recesses 301, with the lower ends of the upper pins 101 correspondingly accommodated in each recess 301, and upright insulating ribs 302 disposed between adjacent recesses 301. Further providing recesses on the support plate for accommodating the upper pins can further reduce the thickness of the printed circuit board assembly.

[0057] In some embodiments, as Figure 8As shown, the printed circuit board may further be provided with an insulating rib hole 202 for accommodating the insulating rib, with the upper end of the insulating rib disposed within the insulating rib hole 202 of the printed circuit board 200. In this embodiment, the insulating rib is partially inserted into the printed circuit board, which can further improve the stability of the electronic assembly structure.

[0058] In some other embodiments, the lower end of the insulating rib may also extend to abut against or almost abut against the second surface 204 of the printed circuit board 200 .

[0059] In some more specific embodiments, the electronic component 100 may include an IGBT having three pins.

[0060] In some more specific embodiments, the insulating rib 302 has an arm 3021 extending in the horizontal direction in the middle of the height direction, and the upper surface of the arm 3021 is in supporting contact with the second surface 204 of the printed circuit board 200, thereby providing support for the printed circuit board while ensuring a certain gap between the printed circuit board and the support plate, thereby reserving more space as an air duct to further facilitate heat dissipation.

[0061] In some more specific embodiments, the insulating ribs 302 may be integrally formed with the support plate 300 to provide structural integrity.

[0062] In other embodiments, the insulating ribs 302 may be provided separately from the support plate 300, and then connected to the support plate. For example, in more specific embodiments, the insulating ribs 302 may be tightly inserted into the support plate through an interference fit, and separate the recesses 301.

[0063] In some embodiments, the support plate 300 may be configured as a part of a housing for accommodating or encapsulating a printed circuit board and electronic components thereon, for example, may be configured as a bottom plate of the housing.

[0064] Based on the above design, the present invention also provides an electric tool in another embodiment, in which the interior of the gripping area of ​​the shell is provided with the electronic component structure as described above, so that during the use of the high-power motor drive platform, the outline size of the electronic component can be more compact, thereby reducing the circumference of the gripping area of ​​the power tool shell, improving the comfort and maneuverability of holding the tool, and meeting the requirements of safe and stable operation of the power tool.

[0065] In some more specific embodiments, the power tool may be any power tool driven by an electronically controlled motor, such as an angle grinder, a circular saw, an electric drill, or an electric hammer.

[0066] Since the present invention does not improve other components of the power tool, they will not be described in detail here.

[0067] It should be noted that the existing technology in the scope of protection of the present utility model is not limited to the embodiments given in the present utility model documents. All existing technologies that do not contradict the solutions of the present utility model, including but not limited to prior patent documents, prior public publications, prior public uses, etc., can be included in the scope of protection of the present utility model.

[0068] In addition, the combination of the various technical features in this case is not limited to the combination described in the claims of this case or the combination described in the specific embodiments. All technical features recorded in this case can be freely combined or combined in any way unless there is a contradiction between them.

[0069] It should also be noted that the above-listed embodiments are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above-listed embodiments, and similar variations or modifications that can be directly derived from or easily conceived by those skilled in the art based on the disclosure of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A support plate for placing a printed circuit board, characterized in that: The support plate (300) has an insulating rib (302) extending in a height direction on a surface for placing a printed circuit board, and the insulating rib forms a safe insulation distance between electronic components and / or charged bodies of the electronic components on the printed circuit board.

2. The support plate according to claim 1, wherein: The support plate (300) has a plurality of recessed portions (301) on a surface for placing a printed circuit board. The recessed portions are used to accommodate pins of electronic components passing through the printed circuit board. The insulating ribs are provided between adjacent recessed portions.

3. The support plate according to claim 1, wherein: The insulating rib plate (302) has an arm (3021) extending in the horizontal direction at the middle portion in the height direction, and the upper surface of the arm is used to support the printed circuit board.

4. The support plate according to claim 1, wherein: The insulating rib plate and the support plate are integrally formed.

5. The support plate according to claim 1, wherein: The insulating rib plate and the support plate are connected through interference fit.

6. An electronic component structure, characterized in that: include: A printed circuit board (200) having a first surface (203) and a second surface (204) facing away from each other, wherein the printed circuit board has pin mounting holes (201); At least one electronic component (100) comprises a body (103) and at least two pins extending from the body, each of the pins comprising an upper pin (101) relatively close to the body of the electronic component, the body being arranged on one side of a first surface of a printed circuit board, the upper pins passing through pin mounting holes on the printed circuit board and being soldered to the printed circuit board; The support plate (300) has an insulating rib (302) extending in a height direction toward the second surface of the printed circuit board. The insulating rib is arranged between adjacent upper pins to form a safe insulation distance between the upper pins.

7. The electronic component structure according to claim 6, wherein: The support plate (300) is further provided with a plurality of recessed portions (301), and the lower ends of the upper pins are correspondingly accommodated in the respective recessed portions.

8. The electronic component structure according to claim 6, wherein: The insulating rib plate (302) has an arm (3021) extending in the horizontal direction at the middle portion in the height direction, and the upper surface of the arm is in supporting contact with the second surface of the printed circuit board.

9. The electronic component structure according to claim 6, wherein: The printed circuit board is provided with an insulating rib hole (202), and the upper end of the insulating rib is arranged in the insulating rib hole of the printed circuit board.

10. The electronic component structure according to claim 6, wherein: The electronic component is an IGBT.

11. The electronic component structure according to claim 6, wherein: The insulating rib plate and the support plate are integrally formed.

12. The electronic component structure according to claim 6, wherein: The insulating rib plate and the support plate are connected through interference fit.

13. An electric tool, characterized in that: The interior of the gripping area of ​​the housing is provided with the electronic component structure as claimed in any one of claims 6 to 12.

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