KR101869334B1 - Multi Tool with Mechanism for Preventing Reverse Rotation - Google Patents

Multi Tool with Mechanism for Preventing Reverse Rotation Download PDF

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Publication number
KR101869334B1
KR101869334B1 KR1020160180963A KR20160180963A KR101869334B1 KR 101869334 B1 KR101869334 B1 KR 101869334B1 KR 1020160180963 A KR1020160180963 A KR 1020160180963A KR 20160180963 A KR20160180963 A KR 20160180963A KR 101869334 B1 KR101869334 B1 KR 101869334B1
Authority
KR
South Korea
Prior art keywords
reverse
knob
tool
protrusion
switch lever
Prior art date
Application number
KR1020160180963A
Other languages
Korean (ko)
Inventor
정연석
Original Assignee
계양전기 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 계양전기 주식회사 filed Critical 계양전기 주식회사
Priority to KR1020160180963A priority Critical patent/KR101869334B1/en
Application granted granted Critical
Publication of KR101869334B1 publication Critical patent/KR101869334B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/16—Hand-held sawing devices with circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/12—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/007—Accessories specially designed for sawing machines or sawing devices for mounting a portable sawing device on a frame part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Abstract

The present invention relates to a multi-tool having a mechanism for preventing reverse rotation. In the present invention, a head portion assembled to a main body portion is provided with an anti-reverse rotation protrusion so that the tool is operated only in the forward direction and the neutral state when the tool is used, so the reverse rotation of the tool is fundamentally blocked to prevent an accident due to malfunction of the tool. The present invention includes a main body portion (10) and a head portion (20). The main body portion (10) is provided with a switch lever (13) operating a switch (12); and a reverse knob (14) disposed at an upper portion of the switch lever (13) to turn the switch lever (13) for forward driving, and the head portion (20) includes an anti-reverse direction protrusion (23) protruding from a lower portion of the connection portion (22) of the housing (21) assembled to the main body portion (10) to prevent the reverse knob (14) from being positioned in a reverse direction.

Description

Multi Tool with Mechanism for Preventing Reverse Rotation "

The present invention relates to a multi-tool having a reverse rotation prevention mechanism, and more particularly to a multi-tool having a reverse rotation prevention mechanism, and more particularly, So that a safety accident caused by a malfunction of the tool can be prevented.

Generally, among the various power tools, a multi-tool can be used, for example, as a circular saw having a main body, a head with a circular saw blade, or a tool head for other purposes, .

If, for example, the circular saw blade is rotated in the reverse direction with power transmitted thereto, particles of the workpiece due to the reverse cutting operation during the cutting operation may protrude toward the worker, resulting in unexpected safety accidents.

Therefore, since the rotation direction is always maintained in the forward direction and the neutral state in which the multi-tool is not operated during the operation of the multi-tool at all times, conventionally, the reverse rotation prevention mechanism having a complicated structure is installed and used. And the like.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide an apparatus and a method for preventing a malfunction of a tool by fundamentally blocking reverse rotation of a tool, To prevent a safety accident in advance, and to provide a multi-tool having a reverse-rotation preventing mechanism portion of a simple structure.

According to an aspect of the present invention, there is provided a portable terminal comprising: a body portion and a head portion; the body portion includes a switch lever for operating a switch; And a reverse knob disposed at an upper portion of the switch lever to rotate the switch lever to enable forward driving,

Wherein:

And a reverse protrusion protruding from a lower portion of a connection portion of the housing to be assembled with the body portion to prevent the reverse knob from being positioned in a reverse direction.

A protrusion is formed on an upper portion of the switch lever, a protrusion is formed on an upper surface of the reverse knob, and a projection of the switch lever is inserted in front of the reverse knob And an insertion piece is formed so that the engagement can be performed.

In addition, an inclined surface is formed on one surface of the reverse-prevention protrusion.

As described above, according to the present invention, in a multi-tool such as a circular saw rotating in one direction, a reverse prevention protrusion is provided on a head part to be assembled with the main body part, and a reverse knob for controlling the driving direction of the switch is provided on the main body part, The rotation of the tool in the reverse direction is fundamentally blocked at the time of operation of the tool, thereby preventing malfunction of the tool, thereby making it possible to prevent a safety accident in advance.

In addition, in the present invention, when the head is to be replaced with another head, the reverse protrusion formed on the head enters the main body, and the reverse knob is automatically set to the neutral position due to the inclined surface formed on one surface of the reverse- So that it is possible to simplify assembly without requiring the operation of a separate reverse knob.

Further, according to the present invention, the structure of the anti-reverse mechanism is simple compared with the conventional art, and the cost can be reduced.

1 is an assembled perspective view of a multi-tool according to an embodiment of the present invention.
2 is an exploded perspective view of a multi-tool according to an embodiment of the present invention.
3 is an enlarged perspective view of part A of Fig.
4 (a) and 4 (b) are views showing a neutral state and a normal state of the multi-tool according to an embodiment of the present invention, respectively.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As used herein, terms used in the present specification are selected from the general terms that are currently widely used, while taking into consideration the functions, but these may vary depending on the intention or custom of the artisan or the emergence of new techniques. Also, in certain cases, there may be a term selected by the applicant at will, in which case the meaning will be described in the description part of the corresponding specification. Accordingly, it is intended that the terminology used herein should be interpreted relative to the actual meaning of the term rather than the nomenclature, and its scope throughout this specification.

FIG. 1 is an assembled perspective view of a multi-tool according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG. 1. FIG. 1 and 2, a multi-tool 1 according to an embodiment of the present invention includes a main body 10, a head 20 detachably assembled to the main body 10, .

In the embodiment of the present invention, the multi-tool 1 will be described with respect to a circular saw.

The main body 10 is provided with a switch knob 11 for operating the multi-tool 1 and a switch 12 is provided behind the switch knob 11.

A switch lever 13 is provided on the upper portion of the switch knob 11. One end of the switch lever 13 is hinged to be rotatable and a protrusion 13a protruding upward is formed on the opposite end side Structure.

As the switch lever 13 is rotated, the forward and reverse directions of the switch 12 are set and operated.

3, a lower protrusion 13b is protruded from the lower surface of the switch lever 13 and a blocking wall 11a is formed inside the switch knob 11 so that the multi-tool 1 Is in the neutral state, it is in a state in which it is in contact with the lower projection 13b.

Therefore, even when the switch knob 11 is pressed, the blocking wall 11a of the switch knob 11 abuts against the lower projection 13b protruding from the lower portion of the switch lever 13 because the multi-tool 1 is in the neutral state So that the multi-tool 1 is not operated.

The switch lever 12 is provided at its upper portion with a reverse knob 14 for enabling forward / neutral operation.

The details of the operation of the multi-tool 1 by the switch lever 13 in the forward / neutral operation are well known, and therefore, detailed description and drawings are omitted.

The reverse knob 14 is movably inserted in front and rear of the main body 10, and the protrusion 14a is formed on the upper surface.

The reverse knob 14 has a structure in which an insertion piece 14b protruding from the bottom surface of the reverse knob 14 is formed so that the protrusion 13a of the switch lever 13 is inserted.

Therefore, when the reverse knob 14 is in the forward position, the protrusion 13a of the switch lever 13 is moved from the state of FIG. 4 (a) to the state of FIG. 4 (b) The lower protrusion 13b formed on the switch knob 11 moves simultaneously and does not come into contact with the blocking wall 11a of the switch knob 11 so that the switch knob 11 is pressed, The forward rotation driving of the multi-tool 1 is performed by the switching operation of the multi-tool 1.

The head portion 20 is mounted on a circular saw blade (not shown) for performing a cutting operation while being rotated only in one direction, and a connection portion 22 of the housing 21 coupled with the main body portion 10 And the reverse-direction preventing protrusion 23 is formed to protrude from the side surface of the protrusion.

One side of the reverse protrusion 23 has a sloped surface 23a and a straight surface 23b at the end of the sloped surface 23a.

1 and 2, a multi-tool 1 according to an embodiment of the present invention having such a structure uses a body 10 and a head 20 in combination, The multi-tool 1 according to the embodiment of the present invention is described by taking a circular saw as an example.

Circular saws perform a cutting operation by rotating the provided circular saw blade only in one direction. If the circular saw blade is rotated in the opposite direction, an unexpected safety accident may occur so that the circular saw blade always rotates in one direction, that is, .

4 (a) is a diagram showing a neutral state. As shown in FIG. 4 (a), the end of the reverse knob 14 exposed on one side of the main body 10 is pushed so that the reverse knob 14 When the protrusion 14a protruded to the upper portion of the multi-tool 1 moves to meet the backward protrusion 23 of the head portion 20, the protrusion 14a stops moving further and stops, So that the switch knob 11 is not pressed and the multi-tool 1 is not operated.

4 (b), the reverse knob 14 is pressed in the direction opposite to the neutral position (opposite to the left arrow direction) of the reverse knob 14 from the opposite side of the main body portion 10, The protruding portion 14a protruding from the upper portion of the reverse knob 14 is moved to the left and is in the forward driving state.

At this time, when the reverse knob 14 is moved to the left, the projection 13a of the switch lever 13 disposed at the lower portion of the reverse knob 14 is inserted into the insertion piece 14b of the reverse knob 14, The protrusion 13a of the switch lever 13 also moves as the insertion piece 14b is moved in accordance with the movement of the reverse knob 14. Then the switch lever 13 is hinged at the inner end, And pivots to the left about the inner end of the lever 13. [

When the switch lever 13 is pivoted to the left, the switch 12 performs a switching operation to enable the circular saw blade to be driven in the forward direction. In this state, when the switch knob 11 is pulled out, forward driving can be performed .

The position of the reverse knob 14 can be maintained while the multi-tool 1 is in use. As shown in Fig. 3, when the switch knob 11 is pulled and is in operation, The lower protrusion 13b formed is positioned on the side surface of the blocking wall 11a formed inside the switch knob 11 so that the reverse knob 14 in the shifted state is moved in the opposite direction The switch lever 13 is blocked by the blocking wall 11a of the switch knob 11 pressed during the operation of the multi-tool 1 and is not moved so that the switch lever 13 is always kept in the position.

Before using the multi-tool 1, the position of the reverse knob 14 should be set to only one of the forward / neutral positions. If the position of the reverse knob 14 is changed to the reverse position A state in which the reverse knob 14 is moved to the right side in the state (a) of Fig. 6), the cutting operation can be performed in a direction opposite to the direction anticipated by the user, Unsafe accidents may occur.

Therefore, according to the embodiment of the present invention, the reverse knob 14 can be positioned only in the forward or neutral state, and is fundamentally prevented from being positioned in the reverse direction, so that the reverse knob 14 is always driven only in the forward direction, have.

In other words, when the main body portion 10 and the head portion 20 are assembled to protrude from the connection portion 22 of the head portion 20 constituting the multi-tool 1, The protrusion 14a of the reverse knob 14 and the rectilinear surface 23b of the reverse prevention protrusion 23 come into contact with each other when the protrusion 23 approaches the protrusion 14a of the reverse knob 14 and is in the neutral state The reverse knob 14 is moved so that the protrusion 14a of the reverse knob 14 and the reverse protrusion 23 are slightly spaced from each other (Fig. 4A) 4), the reverse operation of the multi-tool 1 is blocked by the reverse prevention projection 23 so that the movement is blocked even if the reverse knob 14 is moved to the reverse position, so that the reverse operation is basically prevented You can.

Meanwhile, in order to mount a head portion of a tool other than the head portion 20 having the circular saw blade described above, the head portion 20 must be detached and replaced from the main body portion 10.

However, in the process of replacing the head portion 20 with the other head portion from the main body portion 10, the user can inadvertently move the reverse knob 14 to the reverse position.

If the head of the other function is assembled in the state that the reverse knob 14 is reversely moved, the assembly may not be assembled due to collision with the protrusion 14a of the reverse knob 14. However, The multi-tool 1 according to the example has the inclined surface 23a formed on one side of the reverse-side protrusion 23 so that the reverse-side protrusion 23 is automatically inserted into the reverse- As shown in Fig. 4 (a), by pushing the protruding portion 14a of the protruding portion 14a in the horizontal direction.

In other words, when assembling the head part 20 for other purposes, the protruding part 14a of the reverse knob 14 is automatically pushed to the side by the inclined surface 23a formed on one surface of the reverse preventing protrusion 23, It is not necessary to separately perform the operation of the reverse knob 14 to the neutral position, so that the assembling operation becomes more convenient.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But fall within the scope of the appended claims.

1: Power tool
10:
11: Switch knob
11a:
12: Switch
13: Switch lever
13a:
13b: Lower projection
14: Reverse knob
14a: protrusion
14b:
20: head portion
21: Housing
22: Connection
23: Anti-reverse protrusion
23a:
23b: straight face

Claims (3)

A body portion 10 and a head portion 20,
In the main body 10,
A switch lever (13) for allowing the switch (12) to operate;
A reverse knob 14 disposed above the switch lever 13 to allow the switch lever 13 to rotate in a forward direction;
Lt; / RTI >
The head portion (20)
An anti-reverse protrusion 23 protruding from a lower portion of the connection part 22 of the housing 21 to be assembled with the body 10 to prevent the reversing knob 14 from being positioned in a reverse direction;
/ RTI >
A protrusion 13a is formed on an upper portion of the switch lever 13 and a protrusion 14a is formed on an upper surface of the reverse knob 14 to locate on one side surface of the reverse prevention protrusion 23, An insertion piece 14b is formed in front of the knob 14 so that the projection 13a of the switch lever 13 is inserted and engaged,
The multi-tool according to any one of claims 1 to 3, wherein the reverse-rotation preventing mechanism (23) has an inclined surface (23a) formed on one side thereof. delete delete
KR1020160180963A 2016-12-28 2016-12-28 Multi Tool with Mechanism for Preventing Reverse Rotation KR101869334B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160180963A KR101869334B1 (en) 2016-12-28 2016-12-28 Multi Tool with Mechanism for Preventing Reverse Rotation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160180963A KR101869334B1 (en) 2016-12-28 2016-12-28 Multi Tool with Mechanism for Preventing Reverse Rotation

Publications (1)

Publication Number Publication Date
KR101869334B1 true KR101869334B1 (en) 2018-06-22

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ID=62768244

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160180963A KR101869334B1 (en) 2016-12-28 2016-12-28 Multi Tool with Mechanism for Preventing Reverse Rotation

Country Status (1)

Country Link
KR (1) KR101869334B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024082409A1 (en) * 2022-10-19 2024-04-25 袁崔华 Electric tool capable of limiting turning of working component

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002154073A (en) * 2000-11-17 2002-05-28 Satori Electric Co Ltd Power tool switch
KR200383038Y1 (en) * 2005-02-07 2005-04-28 조형근 Double Head Electric Drill
JP2010234503A (en) * 2009-03-31 2010-10-21 Hitachi Koki Co Ltd Power tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002154073A (en) * 2000-11-17 2002-05-28 Satori Electric Co Ltd Power tool switch
KR200383038Y1 (en) * 2005-02-07 2005-04-28 조형근 Double Head Electric Drill
JP2010234503A (en) * 2009-03-31 2010-10-21 Hitachi Koki Co Ltd Power tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024082409A1 (en) * 2022-10-19 2024-04-25 袁崔华 Electric tool capable of limiting turning of working component

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