JP2006123086A - Portable tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable tool superior in operability. <P>SOLUTION: A recessed groove 17 extending forward from the rear end of a body part 12, is arranged on both side surfaces of the body part 12. The recessed groove 17 has a first inclined face 24 extending toward the bottom 23 of the recessed groove 17 from a ridge line 18 formed of the recessed groove 17 and a surface of the body part 12 and a second inclined face 25 opposed to the first inclined face 24, and is formed so that first and second fingers are sandwiched by the first inclined face 24 and the second inclined face 25 when the first finger and the second finger are applied to the recessed groove 17 by gripping a handle part 13 by hand. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an improvement in operability of a portable tool, and more particularly to a portable tool provided with a handle of a type called an L-shaped handle or a gun handle.

  The electric tool described in Patent Document 1 will be described with reference to FIG.

  When working with a portable tool, it is necessary to apply the tip tool to the mating member and press the electric tool against the mating material substantially parallel to the output shaft. In an electric tool in which the handle portion is located away from the extended line of the output shaft, when the handle portion is gripped and the electric tool is pressed, a couple force (moment) for rotating the electric tool is generated. For this reason, it is difficult to press in parallel with the output shaft. In some cases, the rear part of the body part and the side surface of the body part are gripped so that no couple is generated, and the hand is placed on the extension line of the output shaft.

  In Patent Document 1, in order to improve operability, the surface of the main body is extended from the opposite spindle end of the main body in the longitudinal direction of the spindle, has a length of at least a second finger in the longitudinal direction, and has a surface. It has been proposed to provide a cover 22 having a larger friction coefficient than the surface of the main body, and to provide a groove 17 in the cover 22. In the screw driver manufactured by this proposal, the concave groove 17 is formed in a substantially circular arc, and the radius of curvature R2 thereof is approximately 25 mm. The depth of the concave groove 17 was about 0.5 mm with reference to the ridge line on the upper side of the concave groove 17.

JP 2001-198856 A

  In the conventional portable tool, the force with which the hand holds the portable tool greatly depends on the frictional force acting between the hand and the groove. For this reason. There is a problem that when the finger is tired after working for a long time, the hand and the groove become slippery.

  Further, when the handle portion is gripped by hand, the finger is attached to the concave groove and the portable tool is pressed against the counterpart material, the hand tries to slide in the direction from the opposite handle side, that is, from the open end of the handle toward the base of the handle. For this reason, there is a problem that it is difficult to apply a pressing force.

  Further, the slope on the side opposite to the handle of the concave groove has an effect of preventing the hand from sliding to the side opposite to the handle by engaging with the finger. At this time, the finger is subjected to a force from the slope. For this reason, a finger may become painful when working for a long time. In particular, there is a problem in that the ridgeline formed by the sloped surface of the concave groove on the side opposite to the handle and the body surface bites into the finger and the surface pressure increases.

  An object of the present invention is to solve the above problems and provide a portable tool with good operability.

  An output shaft having a tip tool holding portion, a motor for rotationally driving the output shaft, a body portion which is an outer frame for housing the output shaft and the motor, a switch for controlling the motor, and the switch A portable tool including a handle portion that is an outer frame that accommodates and extends at an angle with respect to the output shaft, wherein the handle portion extends from one end of the body portion on the side opposite to the tool holding portion to the body portion. In the portable tool extending in an L shape together with the groove portion, a concave groove extending from the one end to the tip tool holding portion side is provided on both side surfaces of the trunk portion, and the concave groove includes the concave groove and the trunk portion. A first slope extending from the ridge line formed by the surface toward the bottom of the groove, and a second slope facing the first slope; When the first and second fingers are attached to the concave groove, the first and second fingers are in contact with the first slope and the second It formed so as to be sandwiched by the inclined surface. If it does in this way, a finger | toe will not slip | deviate with respect to a ditch | groove only by grasping a handle | steering-wheel part by hand and attaching a finger | toe to a ditch | groove with light force. Therefore, the finger does not get tired easily, and even if the finger is tired and the force is reduced by working for a long time, the finger is not displaced with respect to the groove.

  Various shapes can be considered for such a concave groove. For example, the concave groove has an arc surface whose cross section is formed by a part of an arc, and the radius of curvature of the arc surface is at least a part. It is configured to be 4 mm or more and 7.5 mm or less. In this way, when the handle portion is gripped by hand and the first finger and the second finger are attached to the concave groove, the first finger and the second finger do not hit the bottom of the arc surface. It abuts so that it may be pinched | interposed into both sides | surfaces. In other words, the side surfaces of the circular arc surface act as the first and second inclined surfaces.

  An output shaft having a tip tool holding portion; a motor that rotationally drives the output shaft; a body portion that is an outer frame that houses the output shaft and the motor; a switch for controlling the motor; A portable tool comprising a handle portion that is an outer frame that accommodates the switch and extends at an angle with respect to the output shaft, the handle portion from one end of the body portion on the side opposite to the tool holding portion In a portable tool that extends in an L shape together with the body portion, a concave groove extending from the one end to the tip tool holding portion side is provided on both side surfaces of the body portion, and the slope of the concave groove on the side opposite to the handle portion The distance between the ridge line formed by the body surface and the bottom of the groove may be at least partially 5 mm or more. In this way, since the slope of the concave groove on the side opposite to the handle and the finger are deeply engaged, the hand does not slip to the side opposite to the handle, and a pressing force can be easily applied.

  An output shaft having a tip tool holding portion; a motor that rotationally drives the output shaft; a body portion that is an outer frame that houses the output shaft and the motor; a switch for controlling the motor; A portable tool including a handle portion that is an outer frame that accommodates the switch and extends at an angle with respect to the output shaft, the handle portion from one end of the body portion on the side opposite to the tool holding portion In a portable tool that extends in an L shape together with the body portion, a recessed groove extending from the one end to the tip tool holding portion side is provided on both side surfaces of the body portion, and the recessed groove extends from the bottom of the recessed groove. A soft layer that is softer and has a higher friction coefficient than the body portion may be provided across the ridge line formed by the slope on the side opposite to the handle portion and the surface of the body portion. If it does in this way, the soft layer between a finger and a slope and the soft layer between a finger and a ridgeline will change, and surface pressure concerning a finger will become small. Therefore, even when working for a long time, the finger does not hurt. Moreover, since the friction coefficient of the ridgeline where a large surface pressure is applied becomes high, a large frictional force can be obtained. Therefore, the anti-slip effect is also increased.

  According to the first aspect of the present invention, the finger is not displaced with respect to the concave groove only by gripping the handle portion by hand and attaching the finger to the concave groove with a light force. Therefore, the finger does not get tired easily, and even if the finger is tired and the force is reduced by working for a long time, the finger is not displaced with respect to the groove. Therefore, a portable tool with good operability can be provided.

  According to the configuration of claim 2, when the handle portion is gripped by hand and the first finger and the second finger are attached to the concave groove, the first finger and the second finger do not hit the bottom of the arc surface. And abuts so as to be sandwiched between both sides of the arc surface. In other words, the side surfaces of the circular arc surface act as the first and second inclined surfaces. Therefore, a portable tool with good operability can be provided.

  According to the configuration of the third aspect, since the slope of the concave groove on the side opposite to the handle and the finger are deeply engaged, the hand does not slip to the side opposite to the handle, and a pressing force can be easily applied. Therefore, a portable tool with good operability can be provided.

  According to the structure of Claim 4, the soft layer between a finger and a slope and the soft layer between a finger and a ridgeline deform | transform, and the surface pressure concerning a finger becomes small. Therefore, even when working for a long time, the finger does not hurt. Moreover, since the friction coefficient of the ridgeline where a large surface pressure is applied becomes high, a large frictional force can be obtained. Therefore, the anti-slip effect is also increased. Therefore, a portable tool with good operability can be provided.

  A screw driver 1 according to an embodiment of the present invention will be described with reference to FIGS.

  The internal structure of the screw driver 1 will be described with reference to FIG.

  The screw driver 1 includes an output shaft 9 having a socket 10 as a tip tool holding portion, a motor 5 that rotationally drives the output shaft 9, a switch 15 that controls the motor 5, and an outer frame that houses the output shaft 9. And a housing 2 that is an outer frame that accommodates the motor 5 and the switch 15. The housing 2 includes a body portion 12 that accommodates the motor 5, and a handle portion 13 that accommodates the switch 15 and extends at an angle with respect to the output shaft 9. The handle portion 13 extends from one end of the body portion 12 on the side opposite to the socket 10 and is provided so that the handle portion 13 and the body portion 12 form an L shape. Such a handle is called an L-shaped handle or a gun handle.

  The motor 5 is provided in parallel with the output shaft 9, and the rotational force of the motor 5 is transmitted to the output shaft 9 through the gear portion 6 that is a transmission mechanism portion and the clutch mechanism 7. The output shaft 9 is provided so as to move slightly in the front-rear direction, and the clutch mechanism 7 does not transmit the rotational force of the motor 5 to the output shaft 9 when the output shaft 9 is positioned forward. When the output shaft 9 is located rearward, the clutch mechanism 7 operates to transmit the rotational force of the motor 5 to the output shaft 9.

  When the switch 15 is pulled backward (to the right in FIG. 4), electric power is supplied to the motor 5 and the output shaft 9 starts to rotate. The switch 15 is provided with an on-lock button 16 for holding the switch 15 in the pulled state. When the on-lock button 16 is pushed after the switch 15 is pulled, the switch 15 is turned on. Locked by. The on-lock button 16 is used for omitting the operation of the switch 15 in operations such as continuously tightening screws.

  The outer frame of the screw driver 1 will be described with reference to FIGS. 1 to 3 and FIGS. 5 to 7.

  The housing 2 includes a housing 2a and a housing 2b which are divided into front and rear, and are combined with each other by a plurality of screws (not shown). Airflow windows 14 for cooling the motor 5 are provided on both side surfaces of the housing 2b. As described above, the housing 2 includes the body portion 12 that accommodates the motor 5, and the handle portion 13 that accommodates the switch 15 and extends at an angle with respect to the output shaft 9. The handle portion 13 extends from one end of the body portion 12 on the side opposite to the socket 10 and is provided so that the handle portion 13 and the body portion 12 form an L shape. The switch 15 is provided in the handle portion 13 and arranged along the inclination of the handle portion 13. The handle portion 13 is formed so that the fourth finger (ringing finger) and the fifth finger (little finger) are in a position where the switch 15 can be pulled when the rear portion of the body portion 12 is gripped as shown in FIGS.

  The improvement of operability by the recessed groove 16 will be described.

  On the side surface of the body portion 12, a concave groove 17 extending in the direction of the socket 10 from the end portion on the handle portion 13 side and having a length of at least the second finger is provided. According to page 192 of the “Human Dimension Data for Design” (1996, Publisher: Japan Publishing Service Co., Ltd.) published by the Research Center for Human Life Engineering shown in FIG. The maximum value of the index finger is 82 mm. The length L of the groove 17 is set to about 102 mm, which is larger than 82 mm, so that the second finger can follow the groove 17 over the entire length. In examining the shape of the concave groove 17, data on the width of the second finger on page 198 of the same data collection was also referred to and is shown in FIG.

  The concave groove 17 has an arc surface whose cross section is formed by a part of an arc. The radius of curvature of the arc surface was set to various sizes, and ten adult men were caused to grip the handle portion 13 so that the first finger and the second finger were along the concave groove 17. The following was found from this experiment. When the radius of curvature R1 is 8.5 mm or more, the first finger and the second finger are in strong contact with the bottom 23, and a gap is formed between the side surfaces 24 and 25, or is not so strong. In this state, if the first finger and the second finger are not gripped with a strong force, the first finger and the second finger are likely to slip out of the concave groove 17. If the curvature radius R1 is 7.5 mm or less, the first finger and the second finger are not in contact with the bottom 23 or are not in contact with each other so strongly that they are in contact with each other so as to be sandwiched between the side surface 24 and the side surface 25. Alternatively, it abuts strongly so as to be sandwiched between the ridgeline 19 and the side surface 25. In this state, the first finger and the second finger are caught so as to attract to the concave groove 17 and do not slip even if not much force is applied to the first finger and the second finger. However, if the curvature radius R1 is smaller than 4 mm, the width of the concave groove 17 is too small, and the first finger and the second finger are difficult to follow along the concave groove 17.

  From this experimental result, in this embodiment, the radius of curvature R1 of the arc surface is set to 7.5 mm. In this way, when the handle portion is gripped by hand and the first finger and the second finger are attached to the concave groove 17, the first finger and the second finger do not hit the bottom 23 of the arc surface, It contacts so that it may be pinched | interposed into the both sides 24 and 25 of a circular arc surface. Accordingly, the finger is not displaced with respect to the concave groove 17 only by gripping the handle portion 13 by hand and attaching the finger to the concave groove 17 with a light force. Therefore, the finger does not get tired easily, and the finger does not shift with respect to the concave groove 17 even if the finger is tired and the force is reduced by working for a long time.

  The concave groove 17 is not limited to the above configuration. A first inclined surface 24 in which the concave groove 17 extends from a ridge line 19 formed by the concave groove 17 and the surface of the body portion 12 toward the bottom 23 of the concave groove 17, and a second inclined surface 25 that faces the first inclined surface 24. The first and second fingers are sandwiched between the first inclined surface 24 and the second inclined surface 25 when the handle portion 13 is gripped by hand and the first and second fingers are attached to the concave groove 17. What is necessary is just to form so that it may be.

  Further, the distance L between the ridge line 18 formed by the inclined surface 24 of the concave groove 17 on the side opposite to the handle portion 13 and the surface of the body portion 12 and the bottom 23 of the concave groove 17 is at least partially 5 mm or more. Is formed. In this way, since the slope 24 and the finger are deeply engaged, the hand does not slide upward (upward in FIG. 8), and a pressing force can be easily applied.

  The improvement of operability by the soft layer 19 will be described.

The housing 2 has a hard layer 20 made of nylon resin or the like, and a soft layer 19 (gray colored portion in the figure) made of a soft elastomer or the like provided on the surface of the hard layer 20. The soft layer 19 is provided so as to protrude from the surface of the hard layer 20 and is formed so as to cover a range of approximately 40% or more of the entire housing 2. The soft layer 19 is provided as a non-slip material mainly on a portion that grips the body portion 12 and the handle portion 13 during work. A soft layer 19 is also formed on the surface of the groove 17 so that the first finger and the second finger applied to the groove 17 are difficult to slip when the body 12 is gripped. Further, as shown in FIG. 8, the ridgeline 18 formed by the bottom surface 23 of the concave groove 17 and the slope 24 of the concave groove 17 on the side opposite to the handle portion 13 and the surface of the trunk portion 12 is softer and friction than the trunk portion 12. A soft layer 19 having a high coefficient is formed. Thereby, the soft layer 19 between the finger and the inclined surface 24 and the soft layer 19 between the finger and the ridgeline 18 are deformed, and the surface pressure applied to the finger is reduced. Therefore, even when working for a long time, the finger does not hurt. Moreover, since the friction coefficient of the ridgeline 18 where a large surface pressure is applied becomes high, a large frictional force can be obtained. Therefore, the anti-slip effect is also increased.

  The operation of the screw driver 1 will be described with reference to FIGS.

  The switch 15 is pulled. When the on-lock button 16 is pressed to lock the switch 15 in the on state, the second finger can be released from the switch 15 and various gripping methods can be performed. As shown in FIGS. 6 and 7, when the rear of the body portion 12 is gripped and the first finger and the second finger are placed along the concave groove 17, the first finger and the second finger are caught in the concave groove 17. In addition, it is possible to feel as if the concave groove 17 is sticking to the finger. Also, the finger is difficult to slip due to the frictional force with the soft layer 19. Thereby, the gripping force can be small.

  Before the screw driver 1 is pressed against the building material, the rotational force of the motor 5 is not transmitted to the output shaft 9 due to the action of the clutch mechanism 7. When a screw is applied to the tip of the screw driver 1 and pressed against the building material, the socket 10 is retracted into the gear cover 3 against the force of the spring 8. The clutch mechanism 7 operates in conjunction with the retreat of the socket 10 to transmit the rotational force of the motor 5 to the output shaft 9, and the driver bit 11 starts rotating to screw the screw into the building material.

  At this time, since the handle portion 13 is provided so as to be inclined with respect to the body portion 12, the hand easily slips upward (upward in FIG. 7). However, according to the present embodiment, since the first finger and the second finger are caught so as to be sandwiched between the concave grooves 17 as described above, the hand is difficult to slip. Further, as described above, the distance L between the ridge line 18 formed by the slope 24 on the anti-handle portion 13 side of the concave groove 17 and the surface of the body portion 12 and the bottom 23 of the concave groove 17 is at least partially 5 mm or more. Therefore, the first and second fingers and the inclined surface 24 are deeply engaged. Thus, the upward slip of the hand is reliably prevented by the slope 24. Further, as described above, since the soft layer 19 is formed from the bottom 23 of the concave groove 17 to the ridge line 18, the surface pressure applied to the finger is small and the finger does not hurt. Moreover, a large frictional force can be obtained, and the effect of preventing slipping can be further increased.

  When the screw driver 1 is separated from the building material, the socket 10 is returned to the initial position by the force of the spring 8, and the operation is completed.

  The present invention is not limited to the screw driver 1 and can be applied to various portable tools including an L-shaped handle in which the handle portion 13 is located at the rear end of the body portion 12 and a handle called a gun handle.

The front view of the screwdriver concerning an embodiment of the invention The rear view of the screwdriver concerning an embodiment of the invention The right view of the screwdriver concerning an embodiment of the invention Cross-sectional view of the overall structure of a screwdriver according to an embodiment of the present invention The rear view which shows the state which hold | gripped the handle part of the screw driver concerning embodiment of this invention The rear view which shows the state which hold | gripped the trunk | drum part of the screw driver concerning embodiment of this invention The front view which shows the state which hold | gripped the trunk | drum part of the screw driver concerning embodiment of this invention Sectional drawing in the AA line of FIG. Measurement data on the length of the second finger Measurement data on the width of the second finger Conventional portable tools

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw driver 2, 2a, 2b Housing 3 Gear cover 4 Locator 5 Motor 6 Gear part 7 Clutch mechanism 8 Spring 9 Output shaft 10 Socket 11 Driver bit 12 Body part 13 Handle part 14 Wind window 15 Switch 16 On-lock button 17 Concave groove 18 Ridge line 19 Soft layer 20 Hard layer 21 Electric tool 22 Cover 23 Bottom 24 Slope 25 Slope

Claims (4)

An output shaft having a tip tool holding portion;
A motor for rotationally driving the output shaft;
A body portion which is an outer frame for housing the output shaft and the motor;
A switch for controlling the motor;
A handle portion that is an outer frame that houses the switch and extends at an angle with respect to the output shaft;
A portable tool comprising
In the portable tool that extends so as to form an L shape together with the body part from one end of the body part on the side opposite to the end tool holding part,
A concave groove extending from the one end to the tip tool holding part side is provided on both side surfaces of the trunk part, and the concave groove extends from the ridge line formed by the concave groove and the trunk part surface toward the bottom of the concave groove. A first slope and a second slope facing the first slope, and the first and second fingers are attached to the concave groove by gripping the handle portion by hand. And a portable tool, wherein the second finger is formed so as to be sandwiched between the first slope and the second slope. An output shaft having a tip tool holding portion;
A motor for rotationally driving the output shaft;
A body portion which is an outer frame for housing the output shaft and the motor;
A switch for controlling the motor;
A handle portion that is an outer frame that houses the switch and extends at an angle with respect to the output shaft;
A portable tool comprising
In the portable tool that extends so as to form an L shape together with the body part from one end of the body part on the side opposite to the end tool holding part,
A concave groove extending from the one end to the tip tool holding part side is provided on both side surfaces of the body portion, and the concave groove has an arc surface whose cross section is formed by a part of an arc, and the radius of curvature of the arc surface is A portable tool characterized in that it is at least partially 4 mm or more and 7.5 mm or less. An output shaft having a tip tool holding portion;
A motor for rotationally driving the output shaft;
A body portion which is an outer frame for housing the output shaft and the motor;
A switch for controlling the motor;
A handle portion that is an outer frame that houses the switch and extends at an angle with respect to the output shaft;
A portable tool comprising
In the portable tool that extends so as to form an L shape together with the body part from one end of the body part on the side opposite to the end tool holding part,
Concave grooves extending from the one end to the tip tool holding part side are provided on both side surfaces of the body part, a ridge line formed by the slope on the opposite handle part side of the groove and the body part surface, and the bottom of the groove part, A portable tool characterized in that the distance between them is at least partly 5 mm or more. An output shaft having a tip tool holding portion;
A motor for rotationally driving the output shaft;
A body portion which is an outer frame for housing the output shaft and the motor;
A switch for controlling the motor;
A handle portion that is an outer frame that houses the switch and extends at an angle with respect to the output shaft;
A portable tool comprising
In the portable tool that extends so as to form an L shape together with the body part from one end of the body part on the side opposite to the end tool holding part,
Concave grooves extending from the one end to the tip tool holding part side are provided on both side surfaces of the body part, and from the bottom of the groove to the ridge line formed by the slope on the side opposite to the handle part of the groove and the surface of the body part A portable tool characterized by providing a soft layer that is softer than the body portion and has a higher friction coefficient.