JP4844409B2 - Portable electric tool - Google Patents

Description

  The present invention relates to a portable electric tool such as an electric screwdriver.

  Conventional electric tools include various types of electric drivers such as a drill driver, an impact driver, and an oil pulse driver, depending on the application, and include a battery-driven portable type.

  As a portable electric tool, it is generally provided with a body part including a drive mechanism part including an electric motor, and a grip part protruding in a substantially right angle direction from an intermediate part or an end part in the longitudinal direction of the body part. Some are configured in a letter shape or substantially L shape, and are configured to grip and operate the grip portion. In such a configuration, a battery pack for driving the electric motor is detachably attached to the protruding end portion of the grip portion.

  In addition, the grip portion has a shape in which both end portions in the longitudinal direction are enlarged as compared with the intermediate portion in the longitudinal direction so that the operator can easily grip the grip portion, and a battery pack mounting portion is formed at the longitudinal end portion. (For example, Patent Document 1).

The housing of this type of portable electric tool is generally formed as a cylinder having an elliptical or oval cross-section by abutting the corresponding edges of two divided parts having an arcuate cross-section. The cylinder is equipped with a drive mechanism and switches.
No. 7-44462

  By the way, in this kind of portable electric tool, weight reduction is desired for a worker's fatigue reduction.

  Since the weight ratio occupied by the housing is relatively large among the parts constituting the portable power tool, the effect of reducing the weight of the housing is high, but on the other hand, the quality requirements for the housing are also high. For example, the drop resistance strength when dropping unexpectedly is one of them.

  If an impact force is input from the ground or the like when the portable power tool is dropped, there is a risk that a large stress concentration will occur at the root side of the grip part relative to the trunk part and the tip part of the projecting side, resulting in damage. is there. However, as a countermeasure, if the narrowed portions of the root side and the protruding tip are thickened, the weight further increases.

  Then, an object of this invention is to obtain the portable electric tool provided with the housing which was lightweight and excellent in drop-proof strength.

In the first aspect of the present invention, the apparatus includes a housing having a trunk outer shell that includes a drive mechanism including an electric motor, and a grip outer shell that protrudes from the trunk outer shell in a substantially perpendicular direction. The grip part outline is formed in a substantially cylindrical shape by abutting the circumferential edges of the two divided bodies having a substantially arched cross section, and the longitudinal tip end part of the grip part outline is larger than the longitudinal intermediate part. In the portable power tool in which the battery pack mounting portion is formed at the front end portion in the longitudinal direction, a thin wall portion is formed in the middle portion in the longitudinal direction of the outer periphery of the grip portion, and the edges of the two divided bodies are opposed to each other. Further, rectangular irregularities that are staggered in the longitudinal direction are provided .

  In invention of Claim 2, the said thin part is provided in the circumferential direction intermediate part of the said division body, The thickness of the said thin part is thinner than the thickness of the circumferential direction edge part of a division body, It is characterized by the above-mentioned. To do.

  In the invention of claim 3, a convex portion extending along the longitudinal direction of the grip portion outline is formed at the central portion in the thickness direction of one circumferential end edge of the two divided bodies, A concave portion extending along the longitudinal direction of the grip portion outline is formed at the thickness direction central portion of the other circumferential edge, the convex portions and the concave portion are fitted, and the thickness of the thin portion is It is characterized by being thinner than the wall thickness between the outer surface of the convex portion and the inner surface of the grip portion outer shell.

  The invention according to claim 4 is characterized in that the thin-walled portion is formed by recessing a cylindrical outer side of the grip portion outer shell.

  The invention according to claim 5 is characterized in that the thin-walled portion is formed by recessing the inside of the cylinder of the outer periphery of the grip portion.

  The invention according to claim 6 is characterized in that a groove or a ridge extending along the circumferential direction is formed in the thin portion.

  The invention according to claim 7 is characterized in that at least a portion where the thin portion is provided in the outer portion of the grip portion is covered with an elastic body.

  The invention according to claim 8 is characterized in that a plurality of through holes penetrating in the thickness direction are formed in the thin portion, and the through holes are filled with the elastic body.

  The invention according to claim 9 is characterized in that the through hole is reduced toward the outside of the cylinder of the outer periphery of the grip portion.

  The invention according to claim 10 is characterized in that the thickness of the outer periphery of the grip portion changes smoothly at the peripheral portion of the thin portion.

In the invention of claim 1 1, wherein the elastic body contact surface of the other irregularities of the rectangular concave-convex is provided.

According to the first aspect of the present invention, since the thin portion is formed in the longitudinal intermediate portion of the grip portion outline, the elasticity of the grip portion outline is increased by the thin portion, and the grip portion outline is applied from the outside by deformation of the grip portion outline. The amount of absorbed impact energy can be increased. Therefore, even when impact energy is applied from the outside, such as when a portable power tool is dropped, the stress concentration at the base part of the outer part of the grip part and the throttle part on the protruding side tip side can be alleviated, and A housing having excellent strength can be obtained. Further, there is an advantage that the housing can be reduced in weight by providing the thin portion, and the material cost can be reduced by eliminating the need to use a material having higher strength. Moreover, it can suppress that two division bodies shift | deviate to the longitudinal direction of a grip part outline, and it can suppress that a grip part outline is damaged by the said shift | offset | difference at the time of fall.

  According to the invention of claim 2, a required thickness is ensured at the circumferential edge of the divided body, which is a joined portion of the two divided bodies, and a thin portion is formed without impairing the coupling strength between the divided bodies. can do.

  According to the invention of claim 3, in the configuration in which the convex portion and the concave portion are fitted at the portion where the circumferential edges of the two divided bodies abut each other, a required thickness is secured at the fitting portion. Thus, a thin portion can be formed without impairing the bonding strength between the divided bodies.

  According to the invention of claim 4, when the cylinder outer side of the grip part outer shell is covered with the elastic body, the contact area between the grip part outer shell and the elastic body is increased by an amount corresponding to the depression formed on the cylinder outer side, and the grip part The elastic body can be prevented from shifting or peeling from the outer shell.

  According to the fifth aspect of the present invention, it is possible to increase the accommodation space for the built-in object in the grip portion as much as the depression is on the inner side, and to improve the degree of design freedom on the outer surface of the cylinder.

  According to the invention of claim 6, the radial rigidity and strength of the grip portion outer shell can be improved by the concave grooves or the ridges extending along the circumferential direction of the grip portion outer shell. On the other hand, it becomes easy to ensure rigidity and strength. In addition, there is an advantage that the thin-walled portion can be further thinned and the drop-proof strength can be further increased.

  According to the seventh aspect of the present invention, it is possible to suppress the appearance from being lost when molding defects such as sink marks occur in the thin wall portion when the grip portion outer shell is resin-molded.

  According to the eighth aspect of the present invention, the housing can be further reduced in weight by the amount of the through hole provided, and foreign materials such as dust are prevented from entering the grip portion by filling the through hole with the elastic body. it can.

  According to the ninth aspect of the present invention, the adhesiveness between the elastic body and the grip portion outer shell can be further enhanced as much as the elastic body is prevented from coming out of the through hole.

  According to the invention of claim 10, since the change in the thickness of the peripheral portion of the thin portion becomes smooth, the stress concentration in the peripheral portion is suppressed, and the grip portion outer shell is prevented from being damaged at the time of dropping or the like. be able to.

According to the invention of claim 1 1, on which can suppress the spacing that the edges of the two divided bodies by an elastic body, the foreign substances water or dust into the inside of the grip portion outer from the seam from entering Can be suppressed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  (First Embodiment) FIG. 1 is a side view of a portable electric tool according to the present embodiment, FIG. 2 is a side sectional view of the portable electric tool when one of the divided housings is removed and the inside is seen, and FIG. These are the principal part expanded sectional views along the AA line in FIG. In the following, a case where the portable electric tool is implemented as the portable drill driver 1 will be exemplified.

  As shown in FIGS. 1 and 2, the drill driver 1 according to the present embodiment is substantially formed from an elongated body portion 4 including a drive mechanism portion 3 including an electric motor 2, and an intermediate portion of the body portion 4. And a grip portion 5 protruding at a right angle. The operator operates the drill driver 1 by holding the grip portion 5.

  The housing 6 of the drill driver 1 includes an outer shell 4G (hereinafter referred to as a body shell outer shell 4G) including the drive mechanism portion 3 and an outer shell 5G of the grip portion 5 (hereinafter referred to as a grip portion outer shell 5G). It is formed so as to form a substantially T-shape.

  The trunk part outline 4G is formed in a substantially cylindrical shape. And the drive mechanism part 3 included in this trunk | drum outer part 4G is the tip of the electric motor 2 which is a drive source, the speed reduction part 7 which decelerates rotation of this electric motor 2, and the rotational driving force of this speed reduction part 7. The drive part 9 which transmits to the chuck | zipper 8 and the bearing part 10 which hold | maintains this drive part 9 rotatably are comprised.

  Further, the grip portion outer shell 5G is also formed in a substantially cylindrical shape. A switch part 11 for controlling the power supply to the electric motor 2 is attached inside the grip part outer shell 5G, and the switch part 11 is operated by a trigger 12 attached to the base side of the grip part 5 so as to be able to be pushed. It has become so.

  The protruding end portion (lower end portion in the figure) of the grip portion outer shell 5G is larger than the middle portion in the longitudinal direction (substantially vertical direction in FIG. 1) of the grip portion outer shell 5G, and the battery pack 13 is detachably mounted. For this purpose, a battery pack mounting portion 14 is formed.

  Further, the grip portion outer shell 5G is provided with a root-side throttle portion 15 on the root portion 5a connected to the trunk portion outer shell 4G so as to be easily gripped by the operator, and a protrusion that forms the battery pack mounting portion 14 A distal end side throttle portion 16 is provided at the side distal end portion 5b.

  Further, the housing 6 having the body portion outer shell 4G and the grip portion outer shell 5G is divided into two substantially divided parts (half parts) 6L, which are divided into two at the center in the direction perpendicular to the paper surface in FIGS. 6R is formed in a hollow shape by matching corresponding end faces 6a and 6b.

  Furthermore, a convex portion (protruding strip in the present embodiment) 17 and a concave portion (concave groove in the present embodiment) 18 extending along the longitudinal direction of the grip portion outer shell 5G are formed in the center portion in the thickness direction of each end face 6a, 6b. The protrusions 17 and the recesses 18 are fitted to each other so that the end faces 6a and 6b are prevented from shifting or separating from each other.

  Regarding the grip portion outer shell 5G, each of the divided bodies 6L and 6R has a substantially arched cross section, and the circumferential edges (end faces 6a and 6b) of the divided bodies 6L and 6R are brought into contact with each other and coupled. Thus, a substantially elliptical cylindrical grip part outline 5G having a substantially elliptical annular cross section is formed.

  Here, in this embodiment, the thin part 20 (FIG. 3) is formed in the longitudinal direction intermediate part (area | region shown with the broken line X in FIG. 1) of the grip part outline 5G. And this thin part 20 is provided in the circumferential direction intermediate part of each division body 6L, 6R. As shown in FIG. 3, the thickness t <b> 1 of the thin portion 20 is formed to be thinner than the thickness t of the general portion (circumferential edge portion or the like), and the fitting between the convex portion 17 and the concave portion 18 is further performed. It is formed thinner than the wall thickness t2 between the outer side surface 17out of the convex portion 17 and the inner surface (inner side surface 5Gin) of the grip portion outer shell 5G.

  Moreover, in this embodiment, the thin part 20 is formed by providing the inner side recessed part 21 which hollowed the cylinder inner surface (inner surface 5Gin) of the grip part outline 5G, and also the said thin part 20 The wall thickness of the housing 6 is smoothly changed at the peripheral edge portion (that is, the boundary portion between the thin portion 20 and the general portion).

  The outer surface 5Gout of the grip portion outer shell 5G is covered with the elastic body 22, and at this time, the elastic body 22 is outside the portion where at least the inner recessed portion 21 (thin wall portion 20) of the grip portion outer shell 5G is provided. The surface (outer surface 5Gout) is covered.

  With the above configuration, according to the drill driver 1 according to the present embodiment, since the thin portion 20 is formed in the longitudinal middle portion of the grip portion outer shell 5G, the thin portion 20 increases the elasticity of the grip portion outer shell 5G. Accordingly, the amount of impact energy absorbed from the outside can be increased by the deformation of the grip portion outer shell 5G. Therefore, even when impact energy is applied from the outside, such as when the drill driver 1 is dropped, the stress concentration at the base portion of the grip portion outer shell 5G and the narrowed portion at the tip end side of the protruding side can be alleviated, and the drop resistance is reduced. The housing 6 excellent in strength can be obtained. In addition, the housing 6 can be reduced in weight by the provision of the thin-walled portion 20, and the material cost can be reduced by eliminating the need to use a material with higher strength.

  Moreover, according to this embodiment, the thin part 20 is provided in the circumferential direction intermediate part of division body 6L, 6R, and the thickness t1 of the said thin part 20 is the thickness of the circumferential direction edge part of division body 6L, 6R. Since it is thinner than t, the required thickness t is secured at the circumferential edge of the divided bodies 6L and 6R, which are the connecting portions of the two divided bodies 6L and 6R, and the coupling strength between the divided bodies 6L and 6R is impaired. The thin part 20 can be formed without this.

  In addition, according to the present embodiment, the thickness t1 of the thin portion 20 is between the outer surface 17out of the convex portion 17 and the inner side surface 5Gin of the grip portion outer shell 5G in the fitting portion between the convex portion 17 and the concave portion 18. In the configuration in which the convex portion 17 and the concave portion 18 are fitted at the portion where the circumferential edges (end surfaces 6a, 6b) of the two divided bodies 6L, 6R abut each other because it is thinner than the thickness t2. Thus, it is possible to form the thin portion without securing the required wall thickness t and impairing the bonding strength between the divided bodies 6L and 6R.

  Further, according to the present embodiment, the inner surface (inner side surface 5Gin) of the grip portion outer shell 5G is recessed to form the thin portion 20 (inner recessed portion 21). In addition, the space for accommodating the built-in object in the grip portion 5 can be increased, and the degree of freedom in design on the outer surface of the grip portion 5 cylinder can be improved.

  Further, according to the present embodiment, since at least a portion of the grip portion outer shell 5G where the thin portion 20 is provided is covered with the elastic body 22, when the grip portion outer shell 5G is molded with resin, Even when a molding defect occurs, it is covered with the elastic body 22, and the appearance can be prevented from being impaired.

  Furthermore, according to the present embodiment, the thickness of the grip part outline smoothly changes at the peripheral part of the thin part 20, so that the stress concentration at the peripheral part is suppressed, and the grip part outline 5G is damaged when dropped or the like. Can be suppressed.

  (Second Embodiment) FIG. 4 is a cross-sectional view of the outer periphery of one of the two divided bodies constituting the housing of the portable power tool according to this embodiment (in the same area as the line AA in FIG. 1). 5 is a cross-sectional view taken along the line BB in FIG. 4, and FIG. 6 is a cross-sectional perspective view of a main part of the grip portion outer shell. In the present embodiment, the case where the portable electric tool is implemented as a portable drill driver is exemplified, but the drill driver according to the present embodiment includes the same components as those in the first embodiment, and therefore, Then, these similar components are denoted by common reference numerals, and redundant description is omitted.

  In the present embodiment, as shown in FIG. 4, the thin-walled portion 20 is formed by providing an outer recessed portion 23 in which a cylindrical outer surface (outer surface 5Gout) of the grip portion outer shell 5G is recessed, and is elastic. The body 22 covers at least the outer surface (outer side surface 5Gout) of the portion where the outer recessed portion 23 (thin wall portion 20) of the grip portion outer shell 5G is provided.

  Furthermore, in this embodiment, as shown in FIG. 5, the thin-walled portion 20 has corrugated irregularities in which concave grooves 24a and ridges 24b extending along the circumferential direction of the grip portion outer shell 5G are alternately formed. 24 is formed.

  Therefore, according to the above-described embodiment, since the thin-walled portion 20 (outside recessed portion 23) is formed by denting the cylindrical outer surface (outside surface 5Gout) of the grip portion outer shell 5G, the grip portion outer shell 5G and The contact area with the elastic body 22 is increased, and displacement and peeling of the elastic body 22 with respect to the grip portion outer shell 5G can be suppressed.

  In addition, according to the present embodiment, since the concave portion 24a or the ridge 24b extending along the circumferential direction is formed in the thin portion 20, the radial rigidity and strength of the grip portion outer shell 5G can be improved. It is easy to ensure rigidity and strength against gripping by the operator. In addition, there is an advantage that the thin-walled portion 20 can be further thinned and the drop-proof strength can be further increased. In addition, it is not essential that the concave groove 24a and the ridge 24b are continuous in a waveform. In addition, the rigidity and strength of the grip portion outer shell 5G can be appropriately adjusted depending on the size, length, number, arrangement, interval, and the like of the groove 24a and the ridge 24b.

  In such a configuration, the outer recessed portion 23 is filled with the elastic body 22, but generally, the elastic body 22 is more than the specific gravity (for example, GFRP: about 1.3) of the material forming the grip portion outer shell 5G. Therefore, it is possible to achieve further weight reduction by filling the outer recessed portion 23 with the elastic body 22.

  Of course, even in the present embodiment, the thickness t1 of the thin portion 20 may be formed thinner than the thickness t of the general portion (circumferential edge portion or the like) and further the thickness t2 of the fitting portion. Moreover, it is preferable to make the change in the thickness of the peripheral portion of the thin portion 20 smooth.

  (Third Embodiment) FIG. 7 is a cross-sectional view of one grip portion of two divided bodies of a portable electric tool according to this embodiment (a cross-sectional view taken along the line AA in FIG. 1). 8) FIG. 8 is a view of one grip part outline of the two divided bodies as viewed from the inside of the cylinder. In the present embodiment, the case where the portable electric tool is implemented as a portable drill driver is exemplified, but the drill driver according to the present embodiment includes the same components as those in the first embodiment, and therefore, Then, these similar components are denoted by common reference numerals, and redundant description is omitted.

  In the present embodiment, as shown in FIG. 7, a plurality of through holes 25 penetrating in the thickness direction are formed in the thin portion 20, and the through holes 25 are filled with the elastic body 22. As shown in FIG. 8, the through holes 25 are formed in a regular hexagon shape, and are arranged in a staggered manner over almost the entire area of the thin portion 20.

  Moreover, as shown in FIG. 7, each through-hole 25 is reduced toward the cylinder outer direction of the grip part outer shell 5G. That is, the opening area Sb of the inner side surface 5Gin is larger than the opening area Sa of the outer side surface 5Gout of the grip portion outline 5G.

  Therefore, according to the above-described embodiment, since the plurality of through holes 25 penetrating in the thickness direction are formed in the thin portion 20 and the through holes 25 are filled with the elastic body 22, the through holes 25 are provided. The housing 6 can be further reduced in weight by that amount, and foreign matter such as dust can be prevented from entering the grip portion 5 by filling the through hole 25 with an elastic body. As described above, since the specific gravity of the material of the elastic body 22 is generally smaller than the specific gravity of the material of the housing 6, compared to the case where the through hole 25 is not provided by filling the through hole 25 with the elastic body 22. It is possible to reduce the weight.

  Furthermore, according to this embodiment, since the through-hole 25 is reduced toward the cylinder outside direction of the grip portion outer shell 5G, the elastic body 22 and the elastic body 22 are prevented from being removed from the through-hole 25. Adhesiveness with the grip part outline 5G can be further enhanced.

  The through holes 25 are not limited to hexagonal shapes, but may be other shapes such as a circular shape or a quadrangular shape, or may be randomly arranged without being aligned.

  Further, in the present embodiment, the case where the thin wall portion 20 is formed as the inner recessed portion 21 is illustrated, but even when the thin wall portion 20 is formed as the outer recessed portion 23, the same through hole can be provided, and the same function can be provided. An effect can be obtained.

  (Fourth Embodiment) FIG. 9 is a side view of the separation boundary portion of the outer portion of the grip portion in a state where two divided bodies constituting the housing of the portable power tool according to this embodiment are separated, and FIG. 10 is the same portion. FIG. In the present embodiment, the case where the portable electric tool is implemented as a portable drill driver is exemplified, but the drill driver according to the present embodiment includes the same components as those in the first embodiment, and therefore, Then, these similar components are denoted by common reference numerals, and redundant description is omitted.

  In this embodiment, as shown in FIGS. 9 and 10, the longitudinal direction of the grip portion outer shell 5G (at the central portion in the thickness direction of the edges (end surfaces 6a, 6b) of the two divided bodies 6L, 6R that face each other ( In FIG. 9, rectangular irregularities (concave part 18 and convex part 17) are provided alternately in the vertical direction. That is, the convex portions 17 and the concave portions 18 formed on the end faces 6a and 6b of the two divided bodies 6L and 6R constituting the grip portion outline 5G are alternately formed with appropriate lengths along the longitudinal direction.

  Specifically, a plurality of convex portions 17a having a predetermined length L1 are formed on the end surface 6a of one divided body 6L with a constant interval S1, and concave portions 18a are formed between the convex portions 17a, and the other A plurality of convex portions 17b having a length L2 substantially corresponding to the length of the interval S1 are formed in a portion corresponding to the concave portion 18a of the end surface 6b of the concave portion 18b. Is formed. The convex part 17 (17a, 17b) is formed in the center part in the thickness direction of the end face 6a, and the concave part 18 (18a, 18b) is formed in the center part in the thickness direction of the end face 6b.

  Further, in the present embodiment, a thin sheet-like elastic body 26 is attached to the contact surface (side surface in the longitudinal direction of the grip portion outer shell 5G) with the other unevenness of the rectangular unevenness (the concave portion 18 and the convex portion 17). Has been provided. The elastic body 26 is integrated with the elastic body 22 that covers the grip portion outer shell 5G.

  In the present embodiment, the elastic body 26 is provided at both longitudinal edges of the convex portion 17 and the concave portion 18, and the elastic bodies 26 are slidably fitted to each other. The elastic body 26 may be on at least one of the contact surfaces adjacent to each other. Further, a similar elastic body may be further provided at the tip of the convex portion 17 or the deep end of the concave portion 18.

  Therefore, according to the above-described embodiment, the end faces 6a and 6b that face each other of the two divided bodies 6L and 6R are provided with the rectangular unevenness (the concave portion 18 and the convex portion 17) that are staggered in the longitudinal direction. Therefore, the two divided bodies 6L and 6R can be prevented from shifting in the longitudinal direction and the radial direction of the grip portion outer shell 5G, and the grip portion outer shell 5G can be prevented from being damaged due to the shift at the time of dropping or the like. Can do.

  Moreover, according to this embodiment, since the elastic body 26 is provided in the contact surface with the other unevenness | corrugation of the rectangular unevenness | corrugation (the recessed part 18 and the convex part 17), the two division bodies 6L are provided with the said elastic body 26. , 6R can be prevented from separating from each other, and foreign matters such as water and dust can be prevented from entering the grip portion outer shell 5G from the boundary between the end surfaces 6a and 6b.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and various modifications can be made. For example, the present invention can be implemented as various portable electric tools such as various impact drivers and oil pulse drivers other than the drill driver.

It is a side view of the portable electric tool concerning 1st Embodiment of this invention. It is the sectional side view of the portable electric tool which removed the one housing divided | segmented in 1st Embodiment of this invention, and looked at the inside. It is a principal part expanded sectional view along the AA line in FIG. It is sectional drawing (sectional drawing in the site | part equivalent to the AA line | wire of FIG. 1) in one grip part outline | summary of the two division bodies which comprise the housing of the portable electric tool concerning 2nd Embodiment of this invention. FIG. 5 is a sectional view taken along line BB in FIG. 4. It is a principal part cross-sectional perspective view of the grip part outer periphery of the portable electric tool concerning 2nd Embodiment of this invention. It is sectional drawing (sectional drawing in the site | part equivalent to the AA line | wire of FIG. 1) in one grip part outline among two division bodies which the portable electric tool concerning 3rd Embodiment of this invention has. It is the figure which looked at one grip part outer case from the cylinder inner side among the two division bodies which the portable electric tool concerning 3rd Embodiment of this invention has. It is a side view in the isolation | separation boundary part of the outer part of a grip part in the state which isolate | separated the two division bodies which comprise the housing of the portable electric tool concerning 4th Embodiment of this invention. It is an expansion perspective view in the separation boundary part of a grip part outline in the state where two division bodies which constitute a housing of a portable electric tool concerning a 4th embodiment of the present invention were separated.

Explanation of symbols

1 Drill driver (portable power tool)
2 Electric motor 3 Drive mechanism part 4G Body part outline 5G Grip part outline 6 Housing 6a, 6b End surface (edge)
DESCRIPTION OF SYMBOLS 13 Battery pack 14 Battery pack attachment part 20 Thin part 22 Elastic body 24a Concave groove 24b Convex strip 25 Through-hole 26 Elastic body

Claims (11)

A housing having a body outer shell including a drive mechanism including an electric motor, and a grip outer shell projecting in a substantially right angle direction from the body outer shell, wherein the grip outer shell has a substantially arch-shaped cross section. The circumferential edges of the two split bodies are abutted to each other and formed into a substantially cylindrical shape, and the longitudinal tip of the outer portion of the grip portion is enlarged more than the intermediate portion in the longitudinal direction, and the battery pack is attached to the longitudinal tip. In the portable electric tool formed with a part,
Forming a thin-walled portion in the middle in the longitudinal direction of the grip portion outer shell ,
A portable power tool characterized in that rectangular ridges that are staggered in the longitudinal direction are provided on edges of the two divided bodies that face each other .   2. The portable electric motor according to claim 1, wherein the thin portion is provided in a circumferential intermediate portion of the divided body, and a thickness of the thin portion is thinner than a thickness of a circumferential end edge portion of the divided body. tool. A convex portion extending along the longitudinal direction of the outer periphery of the grip portion is formed at the central portion in the thickness direction of one circumferential edge of the two divided bodies, and the thickness direction of the other circumferential edge is formed. A concave portion extending along the longitudinal direction of the outer portion of the grip portion is formed in the central portion, and the convex portion and the concave portion are fitted,
The portable electric tool according to claim 1 or 2, wherein a thickness of the thin portion is thinner than a thickness between an outer side surface of the convex portion and an inner side surface of a grip portion outer shell.   The portable electric tool according to any one of claims 1 to 3, wherein the thin-walled portion is formed by recessing a cylindrical outer side of the outer shell of the grip portion.   The portable electric tool according to any one of claims 1 to 3, wherein the thin portion is formed by recessing a cylinder inside of the grip portion outer shell.   The portable electric tool according to any one of claims 1 to 5, wherein a concave groove or a ridge extending along the circumferential direction is formed in the thin portion.   The portable electric tool according to any one of claims 1 to 6, wherein at least a portion of the outer portion of the grip portion where the thin portion is provided is covered with an elastic body.   The plurality of through holes penetrating in the thickness direction are formed in the thin portion, and the through holes are filled with the elastic body. Electric tool.   The portable electric tool according to claim 8, wherein the through hole is reduced in a direction outside the cylinder of the grip portion outer shell.   The portable electric tool according to any one of claims 1 to 9, wherein a thickness of the outer periphery of the grip portion changes smoothly at a peripheral portion of the thin portion. The portable electric tool according to any one of claims 1 to 10, wherein an elastic body is provided on a contact surface of the rectangular unevenness with the other unevenness .

Images