WO2018171500A1

WO2018171500A1 - Electric tool and circuit board assembly thereof

Info

Publication number: WO2018171500A1
Application number: PCT/CN2018/079114
Authority: WO
Inventors: 吴健; 赵珍珍
Original assignee: 博世电动工具（中国）有限公司
Priority date: 2017-03-23
Filing date: 2018-03-15
Publication date: 2018-09-27
Also published as: CN206632411U

Abstract

An electric tool comprises a circuit board assembly (201), a power supply end (203) and a motor end (205). A handle portion (101) has installation posts (1013) inserted into and provided at a middle portion of a handle cavity (1011). The circuit board assembly (201) is received in the handle cavity (1011) and has a first functional region (2011), a second functional region (2013), and an electrically conductive connection portion (2015) electrically connected to the first functional region (2011) and the second functional region (2013). The first functional region (2011) and the second functional region (2013) are separated by the installation posts (1013). The electric tool can make a quick adjustment of the electrically conductive connection portion (2015) to adapt to a new product without having to redesign the entire circuit board assembly.

Description

Power tool and its circuit board assembly

The present application claims priority to Japanese Patent Application No. 201720289079.3, filed on March 23, 2011, to the Chinese National Intellectual Property Office, entitled "Power Tools and Their Board Components."

Technical field

The present application relates to power tools, and more particularly to power tools having circuit board assemblies.

Background technique

With the expansion of power tools and the increasing diversity, more and more styling designs have appeared on the market, as have the handle parts that the user directly holds. At the same time, in order to be more compact and miniaturized, the circuit board has also appeared. The design of the component placed inside the handle. However, due to the difference in the type and appearance of the power tool, the shape of the handle and the distribution of the internal space are not the same, so that each new product development needs to re-design the circuit board assembly, which not only causes long design time, but also makes the past design experience. And security cannot be passed down.

Therefore, it is necessary to improve to overcome the technical problems existing in the prior art.

Summary of the invention

The main problem to be solved by the present application is the layout of the circuit board assembly of the power tool.

In order to solve the above technical problem, in one aspect, the present application provides a power tool including a housing and a tool assembly assembled to the housing, the tool assembly including a circuit board assembly, a power supply upstream of the circuit board assembly And a motor end downstream of the circuit board assembly, the housing includes an assembled handle portion having a handle cavity, the handle portion having a mounting post disposed in a middle portion of the handle cavity, the circuit board assembly The first functional area, the second functional area, and the electrically conductive connection portion electrically connecting the first functional area and the second functional area are accommodated in the handle cavity.

In another aspect, the present application further provides a circuit board assembly for a power tool, which can be received in a handle portion formed by assembling two mounting posts, and the circuit board assembly has a recess gap formed corresponding to the two mounting posts. The circuit board assembly has a first functional area separated by the two mounting post sections, a second functional area, and a plurality of printed lines electrically connecting the first functional area and the second functional area.

According to the present application, the circuit board assembly is divided into a first functional area, a second functional area, and a conductive connection portion electrically connecting the first functional area and the second functional area according to the mounting column, and the handle portion is combined Space, the flexible and flexible adjustment area of the conductive connection is formed on the circuit board assembly, so that some new tools can be designed based on the availability and safety of the existing design without having to re-engineer the entire circuit board assembly. Designed to quickly adjust the conductive connections.

DRAWINGS

The present application will be more fully understood from the following detailed description of exemplary embodiments. among them:

1 is a schematic perspective view showing a power tool of the present application;

Figure 2 is a cross-sectional structural view showing the power tool of Figure 1;

3 is a schematic structural view of the circuit board assembly of FIG. 2;

4 shows a schematic structural view of another circuit board assembly of the present application.

detailed description

Specific embodiments of the power tool 100 of the present application are described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 3 , the power tool 100 of the present embodiment is specifically a cordless drill including a housing 10 and a tool assembly 20 assembled to the housing 10 . The tool assembly 20 includes a circuit board. An assembly 201, a power terminal 203 located upstream of the circuit board assembly 201, and a motor end 205 located downstream of the circuit board assembly 201, the housing 10 including an assembled handle portion 101 having a handle cavity 1011 (the handle) The cavity 1011 is specifically formed by the two semi-cylindrical portions of the housing. The handle portion 101 has a mounting post 1013 that is disposed in the middle of the handle cavity. The circuit board assembly 201 is received in the handle cavity 1011. And having a first functional area 2011 separated by the mounting post 1013, a second functional area 2013, and an electrically conductive connection 2015 electrically connecting the first functional area 2011 and the second functional area 2013. The circuit board assembly 201 incorporates the spatial configuration of the handle portion 101, particularly the position of the mounting post 1013, forming a relatively flexible and flexible adjustment area for the conductive connection portion 2015, so that some new tool designs can be based on existing The usability and security of the design allows for quick adjustment of the conductive connections 2015 without the need to redesign the entire board assembly 201. In this embodiment, the conductive connection portion 2015 is a conductive printed circuit having no electronic functional components and only electrically connecting, and is formed on a circuit board together with the first functional area and the second functional area. In some other embodiments, the conductive connection may also be a cable that physically connects the first functional area circuit board and the second functional area circuit board.

Referring to FIG. 1 to FIG. 3, on the basis of the flexible design of the conductive connection portion 2015, we can further improve the modularization of the first functional area 2011 and the second functional area 2013. For example, the first functional area 2011 in this embodiment is a high voltage portion, and the second functional area 2013 is a low voltage portion to reduce signal interference. Here, the first functional area 2011 may also be referred to as a power part, mainly including a power chip and a MOS tube (field effect tube), etc.; the second function area 2013 is a control part, mainly including an MCU (micro controller) and Amplification circuit and so on. The power portion is adjacent to the power terminal 203 of the circuit board assembly 201 for direct power processing, and the control portion is adjacent to the motor terminal 205 of the circuit board assembly 201 to transmit the control signal motor terminal 205 to the motor. End 205 is executed. The tool assembly 20 also includes a gear set 207 that is driven by a motor end 205 that also includes a fuselage portion 103 that houses the motor end 205 and gear set 207.

Referring to FIG. 2, the handle portion 101 of the embodiment has two mounting posts 1013 spaced apart, and the plurality of printed circuits are disposed between the two mounting posts 1013. The circuit board assembly 201 corresponds to The position of the mounting post 1013 is provided with a stop gap 209. The power drill of the embodiment is a cordless power tool, and the power terminal 203 is connected to the external battery pack 30. The housing 10 further includes a battery holder shell 105 that connects the external battery pack 30. Of course, it can be understood that the cordless power tool may also be a built-in battery pack (not shown), and the housing may include a battery case that houses the built-in battery pack; or the power tool is corded. In the power tool, the housing group is provided with a protective sleeve (not shown) for protecting an external power cord.

In summary, the present application is directed to a circuit board assembly 201 for a power tool that can be housed in a handle portion 101 that is assembled by two mounting posts 1013. The circuit board assembly 201 has corresponding two mounting posts 1013. a yielding gap 209 formed, the circuit board assembly 201 having a first functional area 2011 separated by the two mounting posts 1013, a second functional area 2013, and electrically connecting the first functional area 2011 and the second Several printed lines of the functional area 2013. Referring to the second embodiment shown in FIG. 4 which is slightly different from FIG. 3, it can be seen that the circuit board assembly 201' also includes a first functional area 2011', a second functional area 2013', and an electrical connection. The main difference between the functional area of the functional area 2011' and the second functional area 2013' is: without changing the original first functional area 2011' and the second functional area 2013' module content, as long as the conductive The plurality of printed lines of the connecting portion 2015' are appropriately adjusted to meet different handle requirements.

The above specific embodiments are merely illustrative of the present application and are not intended to limit the application. For example, the handle portion in the above embodiment is provided with two mounting posts for bolt assembly. In fact, the mounting post may also be provided with one, the mounting post may also be only a positioning cylinder for auxiliary installation, etc. . In the above, various changes and modifications can be made by those skilled in the art without departing from the scope of the present application. Therefore, all equivalent technical solutions are also within the scope of the present application. The scope should be defined by the claims.

Claims

A power tool (100) includes a housing (10) and a tool assembly (20) assembled to the housing (10), the tool assembly (20) including a circuit board assembly (201) located at a power supply end (203) upstream of the circuit board assembly (201) and a motor end (205) downstream of the circuit board assembly (201), characterized in that the housing (10) comprises an assembled handle cavity ( a handle portion (101) of 1011), the handle portion (101) has a mounting post (1013) penetrating the handle cavity (1011), and the circuit board assembly (201) is received in the handle cavity (1011) And having a first functional area (2011), a second functional area (2013) separated by the mounting column (1013), and electrically connecting the first functional area (2011) and the second functional area (2013) Conductive connection (2015).
The power tool (100) according to claim 1, wherein the first functional area (2011) is a power part, the second functional area (2013) is a control part; or the first functional area (2011) is a high pressure portion, and the second functional area (2013) is a low pressure portion.
The power tool (100) according to claim 2, wherein the first functional area (2011) is adjacent to a power end (203) of the circuit board assembly (201), and the second functional area (2013) ) near the motor end (205) of the circuit board assembly (201).
The power tool (100) according to claim 1, characterized in that the electrically conductive connection (2015) is a cable or an electrically conductive printed circuit that is free of electronic functional components, only electrically connected.
The power tool (100) according to claim 4, wherein the handle portion (101) has two spaced apart mounting posts (1013) placed on the two mounting posts ( Between 1013), the circuit board assembly (201) is provided with a yield gap (209) corresponding to the position of the mounting post (1013).
The power tool (100) according to any one of claims 1 to 5, wherein the tool assembly (20) further comprises a gear set (207) driven by a motor end (205), the housing (10) further includes a fuselage portion (103) that houses the motor end (205) and the gear set (207).
The power tool (100) according to claim 6, wherein the power tool is a cordless power tool, and the power terminal (203) is connected to an internal battery pack or an external battery pack, and the housing (10) Also included is a battery case that houses the built-in battery pack or a battery holder case (30) that interfaces with the external battery pack.
The power tool (100) according to claim 6, wherein the power tool is a corded power tool, and the housing set is provided with a protective sheath for protecting an external power cord.
A circuit board assembly (201) for a power tool can be housed in a handle portion (101) formed by assembling two mounting posts (1013), the circuit board assembly (201) having corresponding two mounting posts ( 1013) a yielding gap (209) formed, the circuit board assembly (201) having a first functional area (2011), a second functional area (2013) separated by the two mounting posts (1013) Several printed circuits of the first functional zone (2011) and the second functional zone (2013) are electrically connected.
The circuit board assembly (201) for a power tool according to claim 9, wherein the first functional area (2011) is a power part, the second functional area (2013) is a control part; or The first functional zone (2011) is a high pressure section and the second functional zone (2013) is a low pressure section.