JP3228272U - Pen type power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pen-type power tool in which an apparatus is integrated by enhancing performance and use value by a built-in torque adjusting technique. A pen-type power tool includes a housing 1, a shaft center member 2, and a circuit board 4. The shaft center member 2 is arranged in the housing 1, the power source 3 is connected to one end, and the holding portion 21 for holding the attachment is provided at the other end. The sandwiching portion 21 is provided with a screw member 22 that protrudes from the housing 1 and locks the attachment on the outside. The circuit board 4 is arranged in the housing 1 and is connected to the power source 3. A power input terminal 41 and a speed governor 42 for controlling the rotation speed of the power source 3 are provided on the circuit board 4. A torque / rotation speed adjusting unit 43 is provided on the circuit board 4. The torque / rotation speed adjusting unit 43 is located in the housing 1 and automatically adjusts the rotation speed of the power source 3 according to an external factor. [Selection diagram] Fig. 1

Description

The present invention relates to a pen-type power tool, and more particularly to a pen-type power tool that automatically adjusts torque by a built-in torque adjustment technology, integrates a device, and has high utility value.

The pen-type power tool refers to an electric engraving pen, an electric engraving sword, an electric polishing pen, a pen-type electric engraving device, etc. All power tools whose hand-held operation is a pen-hand type belong to this category.
These types of power tools are power tools used in DIY, which are often seen in home improvement stores, and "gun-type" or "atypical" power tools for various woodworking interiors, factory assembly work, heavy work, etc., and their appearance is clear. Different to. Generally, the characteristics required for a pen-type power tool are that it is lightweight and easy to use, and that the pen-hand method has a high degree of freedom in operability.

Pen-type power tools are roughly divided into two types: (1) transformer (or charger) attached type and (2) controller attached type. From beginners to high-end products, the following (1) to ( It is divided into 4) types.

(1) One-handed handle (Hand-piece) type equipped with a household AC / DC converter:
This is the main use group for those who do DIY as a leisure activity. However, in general, the functions of one-handed handle products are limited to the narrow space inside the main body, and the area of the circuit board is limited. Therefore, for example, on / off, adjustment of rotation speed, and carrying after charging with the built-in battery It had only basic functions such as (charger attached type).
(2) Semi-professional-grade handle with controller (Semi-professional Hand-piece and Controller) type:
When a user who DIYs the above-mentioned leisure activities feels that the performance and functions of a product such as a one-handed handle are insufficient, he or she often selects a product of this level. The so-called "controller" is a slave unit in which the power supply and the controller function are integrated. Since the control circuit board is independent of the steering wheel and a lot of space can be obtained, it is possible to add many functions to the circuit board, such as motor forward / reverse switching, safety fuse, power supply indicator lamp, and rotation speed display. it can. In addition, since the controller has a built-in rechargeable battery, the performance and convenience of carrying are high.
(3) Professional-grade handle with controller (Professional Hand-piece and Controller) type:
Users at this level are professionals such as amateurs, engravers, sculptors, nail technicians, and dental technicians, and use them as means of production. Professional-grade users typically want a controller that is highly stable, durable, and has more advanced features. The rotation speed and torque of this standard are several times that of the various types described above, and in addition to the functions described above, the controller has an external pedal, motor rotation speed control, automatic torque compensation, torque fine adjustment, and external attachment. It has functions such as handle support for many sets. However, as a clearer index, since it has a continuous operation ability for a long time, it can cope with severe usage conditions and environment by a design having better heat dissipation performance and a smoother and more precise handle mechanism.
(4) Dental grade:
A micro-type brushless motor and a high-end controller are adopted, and the highest level of performance such as ultra-high speed, keeping the rotation speed constant when the motor is loaded, and being quiet can be obtained.

However, dental-grade and professional-grade pen-type power tools are expensive and can only be used by professionally trained people, and the tools that the general public demands are powerful enough and inexpensive. It was easy to use, but as you can see from the explanation of the classification mentioned above, the products of the introductory machine could not meet the needs of many people, and the motor power could only be used simply. In particular, when the rotation speed is low, the motor may stop immediately when it comes into contact with the work piece, and the torque may decrease until the actual utility value is almost lost, so it is not satisfactory for consumers who like DIY. There wasn't.

An object of the present invention is to provide a pen-type power tool with integrated devices by enhancing performance and value in use by a built-in torque adjustment technique.

In order to solve the above problems, according to the first aspect of the present invention, a pen-type power tool including a housing, a shaft center member and a circuit board, wherein the shaft center member is arranged in the housing. Along with the installation, a power source is connected to one end, a holding portion for holding the attachment is provided at the other end, and the holding portion is provided with a screw member protruding from the housing and locking the attachment on the outside. The circuit board is arranged in the housing and connected to the power source, and on the circuit board, a power input terminal, a speed controller for controlling the rotation speed of the power source, and a speed controller. Is provided, and a torque / rotation speed adjusting unit is provided on the circuit board. The torque / rotation speed adjusting unit is located in the housing, and the rotation speed of the power source is adjusted according to an external factor. Provided is a pen-type power tool characterized by automatic adjustment.

The pen-type power tool of the present invention calculates the torque / rotation speed adjustment unit based on the voltage and current of the motor rotation speed change, automatically adjusts the motor rotation speed and simulates, and the utility value of the pen-type power tool and Increase the effect.

It is an exploded perspective view which shows the pen type power tool which concerns on one Embodiment of this invention. It is a perspective view which shows the pen type power tool which concerns on one Embodiment of this invention. It is an assembly sectional view which shows the pen type power tool which concerns on one Embodiment of this invention. It is sectional drawing which shows the axial center positioning of the pen type power tool which concerns on one Embodiment of this invention.

In order to more completely and clearly disclose the technical means of the present invention and the effects achievable thereby, the present invention will be described in detail below together with the disclosed accompanying drawings and reference numerals.

See FIGS. 1 to 3. FIG. 1 is an exploded perspective view showing a pen-type power tool according to an embodiment of the present invention. FIG. 2 is a perspective view showing a pen-type power tool according to an embodiment of the present invention. FIG. 3 is an assembly sectional view showing a pen-type power tool according to an embodiment of the present invention.
As shown in FIGS. 1 to 3, the pen-type power tool according to the embodiment of the present invention is composed of at least a housing 1, a shaft center member 2, and a circuit board 4.

The axial center member 2 is arranged in the housing 1 described above. A power source 3 is connected to one end of the shaft center member 2, and a holding portion 21 for holding an attachment is provided at the other end. The above-mentioned sandwiching portion 21 is provided with a screw member 22 that protrudes from the above-mentioned housing 1 and locks the attachment on the outside.

The circuit board 4 is arranged in the housing 1 described above and is connected to the power source 3 described above. On the circuit board 4 described above, a power input terminal 41 and a speed governor 42 for controlling the rotation speed of the power source 3 described above are provided.

A torque / rotation speed adjusting unit 43 is provided on the circuit board 4 described above. The torque / rotation speed adjusting unit 43 described above is located in the housing 1 described above, and can automatically adjust the rotation speed of the power source 3 described above according to an external factor.

See FIGS. 1 to 3. As shown in FIGS. 1 to 3, when actually assembling, the housing 1 of the pen-type power tool according to the embodiment of the present invention has various forms, for example, a double housing type, a single housing type, and the like. It may be designed in various forms depending on each manufacturer, such as a cover type.
As shown in FIGS. 1 to 3, the present embodiment is composed of upper and lower housings, but the present embodiment is not limited to this. Further, the housing 1 may be locked by screwing with a screw, fixing with a claw portion, or by a screw ring 11 located at the rear end of the housing 1 as shown in FIGS. 1 to 3. The power input terminal 41 described above may be connected to an external power source, or may be used as a power supply end for the built-in battery.

When the circuit board 4 described above is mounted in the housing 1 described above, the speed governor 42 described above is exposed from the surface of the housing 1 described above, and when operated by the user, the rotation speed of the power source 3 described above can be controlled. Yes (similar to the control switch function). A motor is adopted as the power source 3 described above. The output shaft end of the power source 3 described above is attached corresponding to the shaft center member 2. A fan 23 for heat dissipation is provided on the shaft core member 2 described above, and when the shaft center member 2 turns, the fan 23 also turns together to effectively discharge the heat generated from the power source 3 described above. Can be done. Subsequently, the holding portion 21 at the front end of the shaft center member 2 described above is located outside the housing 1 described above, and the attachment is sandwiched by the holding portion 21 described above. For example, a production tool (for example, a chisel attachment, a polishing cutter attachment, etc.) used by a user such as a sculptor, a prototype master, a nail technician, or a dental technician is screwed to the outside of the holding portion 21 by the above-mentioned screwing member 22. And lock the attachment.

See FIGS. 1 to 4. As shown in FIGS. 1 to 4, when the user grips the pen-type power tool for operation, the handle sleeve 5 is arranged outside the front end of the housing 1 and behind the screwing member 22 described above. It may be easy for the user to grasp. When the user replaces the attachment, when the shaft center fixing member 6 is inserted at the position corresponding to the shaft center member 2 on the housing 1 described above, the shaft center fixing member 6 described above becomes the shaft center member 2 described above. The attachment can be easily replaced to prevent it from being positioned and rotated (see FIG. 4).

See FIGS. 1 to 4. As shown in FIGS. 1 to 4, when engraving and polishing are performed by the pen-type electric tool of the present embodiment, when the attachment at the front end of the shaft center member 2 is brought into contact with the workpiece by the power source (motor) 3 described above. When the naturally generated frictional force lowers the rotation speed of the power source (motor) 3 and the rotation speed of the power source (motor) 3 is changed according to the force applied by the user, the above-mentioned circuit board The torque / rotation speed adjustment unit 43 analyzes the voltage and current when the rotation speed of the power source (motor) 3 changes, and the torque / rotation speed adjustment unit 43 calculates and automatically fine-tunes the voltage and current. , "Constant speed-like" virtual effect is obtained.

As can be seen from the above, the pen-type power tool of the present invention has the following effects (1) and (2) as compared with the prior art.
(1) When the power rotation speed is set to the Low side, the torque becomes so small that it has almost no utility value, and the attachment comes into contact with the workpiece and the motor stops immediately, the torque / rotation speed adjustment built into the circuit board Using the unit's technology, the motor that is about to stop is adjusted by "torque automatic compensation", the output of the transformer is adjusted by the program, and the resistance is increased by forcibly recovering to near the preset gear. It is possible to prevent the pen-type power tool from slowing down or stopping, and to improve the practicality of the pen-type power tool at a low rotation speed.
(2) By utilizing the technology of the torque / rotation speed adjustment unit built in the circuit board, it is easy to use and carry without attaching an auxiliary adjustment controller externally.

1 Housing 2 Axis member 3 Power source 4 Circuit board 5 Handle sleeve 6 Axis fixing member 11 Screw ring 21 Holding part 22 Screw member 23 Fan 41 Power input end 42 Governor 43 Torque / rotation speed adjustment unit

Claims (3)

A pen-type power tool equipped with a housing, a shaft member, and a circuit board.
The axial member is arranged in the housing, a power source is connected to one end, a holding portion for holding the attachment is provided at the other end, and the holding portion is projected from the housing and described. A screw member that locks the attachment is provided on the outside,
The circuit board is arranged in the housing and is connected to the power source, and a power input terminal and a speed governor for controlling the rotation speed of the power source are provided on the circuit board. Be,
A torque / rotation speed adjusting unit is provided on the circuit board, and the torque / rotation speed adjusting unit is located in the housing and automatically adjusts the rotation speed of the power source according to an external factor. Characterized by
Pen type power tool. The pen-type power tool according to claim 1, further comprising a handle sleeve located on the outer side of the front end of the housing and further provided on the rear side of the screwing member so that the user can easily grip the housing. The pen type according to claim 1, further comprising a shaft center fixing member that is inserted at a position corresponding to the shaft center member on the housing and prevents the shaft center member from being positioned and rotated. Electric tool.

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