WO2007119597A1

WO2007119597A1 - Electric power tool with illumination light

Info

Publication number: WO2007119597A1
Application number: PCT/JP2007/056991
Authority: WO
Inventors: Kigen Agehara; Michio Yamashita
Original assignee: Max Co., Ltd.
Priority date: 2006-03-30
Filing date: 2007-03-29
Publication date: 2007-10-25
Also published as: JP5002999B2; JP2007268635A

Abstract

A motor (1) is stored in the rear part of a housing at the rear, and a rotation-driving unit (3) is stored in the front part of the housing. A rotation-driving transmission unit (4) is provided on the front side of the housing (2). An illumination light (5) is provided at the front of the housing (2). The illumination light (5) is disposed on the lower side of a driving unit case (13) in which the rotation- driving unit (3) is stored. A space part (S) is formed between the illumination light (5) and the driving unit case (13).

Description

Specification

Electric tool with illumination light

Technical field

[0001] The present invention relates to a technique for improving a power tool provided with an illumination light.

Background art

Conventionally, in order to easily perform work in a dark place, an electric tool including an illumination light that illuminates a work target place is known. In this electric tool, it is necessary to efficiently illuminate the vicinity of the tip of the tool with the illumination light. Therefore, when installing the illumination light, the vibration that houses the drive mechanism that outputs the impact drive output of the electric tool is heated greatly. It is made on the outer surface of the drive unit case. For this reason, measures are taken to protect the illumination light from vibration and heating of the drive case.

[0003] Specifically, it is attached to the outer surface of the drive unit case via an elastic member having heat insulation properties. A part of a protective cover that covers the drive unit case is used as the elastic member (see, for example, JP-A-2005-040934).

[0004] However, although it is not limited to the above-described installation of the illumination light, in general, a component that interposes an elastic member for the purpose of relaxing vibration transmission and blocking heat transmission as described above Depending on the selection of the elastic member, the vibration transmission mitigation effect by the use of elastic force, which is the original function of the elastic member, may provide a satisfactory result, From the point of view of blocking, even the use of an elastic member with thermal insulation has a very limited effect, and satisfactory results cannot always be obtained. In view of this, the use of an elastic member is not necessarily a suitable choice when the viewpoint is placed on heat transfer interruption measures in the mounting of the above-described components.

[0005] Further, it should be emphasized in the installation by interposing an elastic member that damage due to the influence of various surrounding state forces such as heat in the long-term use of the elastic member, deterioration due to elastic fatigue, and the like should be avoided. Can't pass. The deterioration of the elastic member reduces the heat transfer interruption effect by force if the vibration transfer relaxation effect is significantly reduced. Yes, when mounting an illumination light, the mounting part loosens and rattles and generates an abnormal noise, sometimes resulting in damage to the illumination light.

[0006] Given the circumstances described above, the use of elastic members in the installation of components and the like is by no means a good choice, and the viewpoint power for improving the heat transfer interruption effect. The preferred improvement in the installation of other lighting lights. There is a need to provide a solution.

Disclosure of the invention

[0007] One or more embodiments of the present invention provide an electric tool with an illumination light that can effectively block heat transfer to the illumination light.

[0008] According to one or more embodiments of the present invention, a motor with a light is provided with a rotation drive unit and a rotation drive transmission unit provided in front of a motor and a housing housing the motor, and an illumination light at the front. In the moving tool, the illumination light is disposed below the drive unit case that houses the rotation drive unit, and a gap is formed between the illumination light and the drive unit case.

[0009] In the electric tool with a light, the illumination light is disposed below the drive unit case that houses the rotation drive unit, and a gap is formed between the illumination light and the drive unit case. Drive unit side force Heat transfer to the illumination light side is effectively blocked by the gap. In addition, the gap between the two effectively blocks transmission of vibration in the drive case. Furthermore, the heat radiation effect on the outer surface of the drive unit case is enhanced by the gap.

[0010] Further, in the electric tool with a light, the housing light may be divided into two vertically divided into two left and right housing parts, and the illumination light is interposed between one housing part and the other housing part. It may be clamped and fixed.

[0011] When the illumination light is sandwiched and fixed between the left and right housing parts, the illumination light is firmly attached and does not loosen even during long-term use. Also, the installation work by holding the illumination light is relatively easy.

[0012] Other features and advantages will be apparent from the description of the examples and the appended claims.

Brief Description of Drawings

FIG. 1 is a side view of an impact driver according to an exemplary embodiment of the present invention.

[Figure 2] Longitudinal section of the above impact driver

[Figure 3] Enlarged view of the front of Figure 2 [Fig. 4] Disassembled perspective view showing the whole with the protective cover removed.

[Fig.5] XX cross section in Fig.1

[Fig.6] Y—Y cross section in Fig.1

[Fig.7] Z-Z cross section in Fig.1

Explanation of symbols

[0014] 1 motor

2 Housing

2a, 2b Housing part

3 Drive unit

4 Rotation drive transmission part

5 Lighting light

13 Noma Case

S Gap

BEST MODE FOR CARRYING OUT THE INVENTION

[0015] Overview of Electric Impact Driver>

FIG. 1 is a side view of an electric inverter driver as an electric tool with an illumination light according to an exemplary embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the impact driver, and FIG. 3 is an enlarged view of the front part thereof. FIG. 4 is an exploded perspective view thereof. 5 is a cross-sectional view along the line XX in FIG. 1, FIG. 6 is a cross-sectional view along the line Y-Y in FIG. 1, and FIG. 7 is a cross-sectional view along the line ZZ in FIG. Note that the electric tool according to the present invention is not limited to the electric impact driver, and the description in the typical embodiment of GUGUKO is applied to the extent that it is recognized that it is common to other similar electric tools.

[0016] The electric impact driver has a nose housing the motor 1 at the rear, a bullet-shaped rotation drive unit 3 at the front of the hood 2, and a drive transmission unit 4 at the front of the rotation drive unit 3. The front of the ring 2 is equipped with a light 5 for illumination.

[0017] Inside the housing 2, a motor 1 and a cooling fan 6 are housed. In addition, a grip portion 7 is formed at the lower part of the housing 2 so as to be divided into left and right portions. Further, a chuck holding a driver bit (not shown) as a rotational drive transmission unit 4 is provided in front of the front housing 2. I have.

[0018] The rotation drive unit 3 includes a speed reduction unit 10 using a planetary gear, a hammer 11, an output shaft 12, and an anvil 15. The output shaft 12 is operatively connected to the front anvil 15. The hammer 1 1 is splined to the output shaft 12 so that the anvil 15 can be hit intermittently. The rotation drive unit 3 is mounted inside a metal hammer case (drive unit case) 13. Further, the rear end of the hammer case 13 is opened, and the storage case 14 of the speed reduction unit 10 is fitted into the open part. A protective cover 20 made of an elastic material such as urethane rubber is detachably provided on the outer surface of the hammer case 13.

[0019] A trigger lever 16 and a rotation direction switching operation member 17 are provided at the upper end of the grip portion 7, and the illumination light 5 is turned on when the motor 1 is driven by the operation of the trigger lever 16. It is configured. The illumination light 5 may be configured to flash by turning on or off a dedicated switch different from the trigger lever 16. In addition, the electric power of the battery arranged in the battery pack is distributed so as to be supplied to the motor 1 and the illumination light 5.

[0020] Lighting light and its installation>

Next, the illumination light 5 is arranged below the hammer case 13. That is, as shown in FIG. 2 and the like, the illumination light receiving portion 18 is halved at a position corresponding to the lower side of the hammer case 13 below each front portion of the left and right housing portions 2a and 2b of the housing 2. Is formed. A cylindrical part 21 having a female screw is formed inside the illumination light receiving part 18 of one housing part 2a, and the through hole of the fixing screw 22 is formed in the other housing part 2b at a position corresponding to the cylindrical part 21. 23 is formed. In addition, an engagement groove 24 is formed in the rear portion of the illumination light housing portion 18.

As shown in FIG. 6, the illumination light 5 is configured by housing a light emitting diode 25 in a housing portion 27 formed in a lens block 26. As the light emitting diode, one having high luminance is used.

The lens block 26 is a transparent resin member formed by protruding leg portions 28 at the rear of both sides of the light emitting diode housing portion 27, and through holes 30 penetrating the both sides are formed at the rear portion of the lens block 26. ing. Engaging convex portions 31 are formed on both sides of the lens block 26. Note that the light emitted from the light emitting diode 25 is the tip side of the impact driver, that is, That is, the direction is adjusted so that it is directed to the work target location by a driver bit (not shown).

[0023] When the illumination light 5 is attached, the illumination light 5 is arranged between the housing parts of the housing parts 2a and 2b, and the lens block is closed as shown in FIG. 6 when the housing parts 2a and 2b are closed. The engaging convex part 31 of 26 is engaged with the engaging groove 24 of both the nosing parts 2a and 2b, and further, as shown in FIG. 5, the through hole 23 of the lens block 26 extends from the through hole 23 of one housing part 2a. The fixing screw 22 passed through 30 is screwed into the female screw of the cylindrical part 21 passed through the through hole 23 of the lens block 26 from the other housing part 2b to be integrally coupled. As a result, the illumination light 5 is sandwiched and fixed between the housing parts 2a and 2b.

By the way, when attached as described above, a gap S is formed between the illumination light 5 and the hammer case 13. That is, as shown in FIGS. 6 and 7, a step portion is formed on the upper surface portion of the lens block 26 of the illumination light 5, and the central portion 33 is lowered. Therefore, the side portions 34 are not in contact with the lower surface of the hammer case 13, and the gap portion S is formed in the central portion 33.

[0025] Since the space S is filled with air as a heat insulating material, the transfer of heat generated in the hammer case 13 to the illumination light 5 side can be effectively blocked. Further, the gap S can block vibration transmission between the hammer case 13 and the illumination light 5. Further, the gap S improves heat dissipation in the hammer case 13.

[0026] The illumination light 5 is attached to the louver 2 and the wing 2 by holding the lens block 26 in a state of being housed in the illuminating light housing 18 of the two divided wings 2 and 2 of the wing 2a and 2b. Further, since the engagement grooves 24 and the engagement protrusions 31 formed on the housing portions 2a and 2b and the illumination light 5 side are engaged with each other, it is possible to A strong mounting strength that does not loosen even during use can be obtained. Also, the installation work by holding the illumination light 5 is relatively easy.

[0027] The heat dissipation structure of the illumination light 5 is not limited to the impact driver. It can also be applied to electric tools with heat generation such as electric drills and electric drivers.

[0028] Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. It is.

[0029] This application is based on a Japanese patent application filed on March 30, 2006 (Japanese Patent Application No. 2006-095385), the contents of which are incorporated herein by reference.

Industrial applicability

[0030] The present invention can be used for an electric power tool such as an impact driver, an electric drill, and an electric screwdriver.

Claims

The scope of the claims

[1] a motor housed in the rear of the housing;

A rotary drive provided in front of the housing;

A drive unit case for storing the rotation drive unit;

A rotational drive transmission portion provided in front of the housing;

An illumination light provided at a front portion of the housing and disposed below the driving unit case;

A gap formed between the illumination light and the drive unit case;

An electric tool with an illumination light, comprising:

[2] The housing is divided into two vertically divided housing parts on the left and right,

The illumination light is clamped and fixed between one housing part and the other housing part.

The electric tool with an illumination light according to claim 1.

[3] The illumination light includes a lens block and a light emitting element housed in a housing portion formed in the lens block,

A step portion is formed on the upper surface portion of the lens block to lower the central portion, and the gap portion is formed in the central portion.

The electric tool with an illumination light according to claim 1.