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Hand-held electric tool

A hand-held power tool and handle technology, applied in power tools, manufacturing tools, portable mobile devices, etc., can solve the problem of easy wear and tear of potentiometers, achieve convenient holding and operation, reduce overall size, and reduce outer diameter size Effect

Active Publication Date: 2013-07-24
POSITEC POWER TOOLS (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It should also be emphasized that the potentiometer is prone to wear after a period of use, which may be affected by dust, moisture and salt lake environments (such as seaside), which will generate friction to prevent the smooth sliding of the button

Method used

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Examples

Experimental program
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Embodiment Construction

[0023] like figure 1 As shown, in this embodiment, the hand-held electric tool 2 is an electric drill powered by a battery 4 and has a housing 6 . The housing 6 includes a top 8, a handle 10 extending downward from the top 8, and a foot 12 at the bottom of the handle. In the top 8, a DC motor 14, a motor fan 16 for cooling the motor 14, a gear reduction system 18 connected with the motor 14 through a motor shaft 20, and a printed circuit board 22 are arranged on the circuit board 22. The element is used to control the rotational speed of the motor 14 . An output shaft 24 extends from the gear reduction system 18 and protrudes from the housing 6 and is connected to a chuck 26 . When the electric drill is working, a working head 28 is clamped in the chuck 26 to process the workpiece (not shown).

[0024] The handle 10 has a relatively small outer diameter D, in this embodiment the outer diameter D is 4 cm, of course it can also be smaller. A speed regulating switch 30 is arr...

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Abstract

The invention relates to a hand-held electric tool, which comprises a casing, a motor, a displacement pushbutton, an elastic piece, a pressure sensor and a control assembly, wherein the casing is provided with a handle, the motor is accommodated in the casing and is used for driving a working head and controlling the rotation speed of the working head during working, the displacement pushbutton is arranged on the handle and is pushed by an operator, the elastic piece is combined with the displacement pushbutton together, the pressure sensor is connected with the elastic piece and is used for providing the outputted voltage according to the position of the displacement pushbutton, the control assembly is connected with the motor, and is used for making response to the outputted voltage according to the position of the displacement pushbutton, so as to variably control the rotation speed of the motor. By adopting the structure, the overall size of a speed adjusting switch is greatly reduced, and the outer diameter size of the handle is further reduced, so the hand-held electric tool can be conveniently held and operated by a user with smaller hands.

Description

[0001] This application is a divisional application of the Chinese invention patent application filed by the applicant on January 19, 2007. technical field [0002] The invention relates to a hand-held electric tool, in particular to a hand-held electric tool capable of adjusting the rotating speed of a working head. Background technique [0003] Existing hand-held electric tools, such as electric drills or electric screwdrivers, usually adjust the rotational speed of the working head through the operator's operation of a speed control switch. It generally consists of a housing with a top, a handle attached to the top, and a compartment below the handle for the battery. The electric tool also has a button arranged on the handle for the operator to press, and a speed control switch connected with the button. The speed control switch includes a potentiometer (potentiometer), which is used to measure the distance traveled by the button under the action of the operator's pressu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25F5/00B23B45/02B25B21/00
Inventor 强尼·鲍瑞那图
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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