Electric tool

Abstract

The invention provides an electric tool (1). The battery holder (40) is supported so as to be displaceable in the front-rear direction with respect to the main body case (11). The first elastic body (50) is interposed between the main body case (11) and the battery holder (40). The terminal (51) is supported so as to be displaceable in the front-rear direction with respect to the battery holder (40). The second elastic body is interposed between the battery holder (40) and the terminal (51). The lower part of the battery holder (40) is provided with a holder lower part (42). The main body case (11) is provided with a main body extension part (60). The third elastic body (61) is interposed between the holder lower part (42) and the main body case (11). Damage to the battery is reduced by the first to third elastic bodies absorbing impact during falling or the like. Therefore, the vibration resistance and the impact resistance of the battery can be improved under the condition that the size of the electric tool is not increased.

Description

Technical Field

[0001] The invention relates to an electric tool capable of installing a battery. Background Art

[0002] Patent document 1 discloses a hand-held grinder that can be equipped with a battery. The electric tool is intended to reduce vibration of the battery during use and absorb impacts caused by, for example, falling of the battery. The battery is mounted on the tool body via a battery holder. Protrusions are provided at multiple locations of the battery holder, and elastic components are mounted on each protrusion. The battery holder is supported on the tool body via elastic components at multiple locations. Prior art literature Patent Literature

[0003] Patent Document 1: U.S. Patent No. 10232479 Summary of the invention [Technical problem to be solved by the invention]

[0004] In order to improve the vibration absorption capacity, the addition of elastic components or the use of large elastic components tends to result in an increase in the size of the electric tool. In view of this situation, an object of the present invention is to make the battery exhibit higher vibration resistance and impact resistance without increasing the size of the electric tool. [Technical solutions for solving technical problems]

[0005] According to one embodiment of the present invention, for example, an electric tool has a tool body and a battery holder, and the battery holder is supported so as to be displaceable at least in the up-down direction relative to the tool body. For example, the electric tool has a first elastic body, and the first elastic body is interposed between the tool body and the battery holder. For example, the electric tool has a terminal, and the terminal is supported so as to be displaceable in the up-down direction relative to the holder body of the battery holder, and is provided with a connecting terminal. For example, the electric tool has a second elastic body, and the second elastic body is interposed between the holder body and the terminal. The electric tool has a third elastic body, and the third elastic body is provided on the tool body in a manner facing (opposite) to the lower surface of the battery installed by moving from top to bottom relative to the battery holder.

[0006] Therefore, the first to third elastic bodies are dispersedly arranged at three locations to reduce vibrations generated when the battery is used and absorb impacts generated when the battery is dropped, for example. Thus, the vibration resistance and impact resistance of the battery are improved without increasing the size of the electric tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is the left side view of the driving tool. Figure 2 yes Figure 1 The II-II section view is a longitudinal section of the tool body. This figure shows the driver () in the standby position. Figure 3 This is a right side view of the driving tool. This figure shows the state in which the right side split housing is removed to expose the inside. Figure 4 This is a right side view of the battery installation part. This figure shows the state where the right half shell is removed. Figure 5 This is a perspective view of the battery holder. This view shows the state viewed from the right rear obliquely. Figure 6 This is a perspective view of a single body of the battery holder, as seen from the right front obliquely. Figure 7 It is a right side view of a single body of the battery holder. Figure 8 This is a three-dimensional view of the battery holder. This view shows the state where the right half holder is removed. Fig. 9 This is a perspective view of the battery installation section. This view shows the state where the right half shell and battery holder are removed. Fig.10 It is a three-dimensional diagram of a battery. Fig.11 It is a side view showing a state where the electric tool has fallen onto the floor surface. Description of Reference Numerals W: material to be driven; t: driven part; 1: driving tool; 2: driving device; 2a: engaging part; 3: grip; 4: switch operating lever; 4a: switch body; 5: battery mounting part; 6: battery; 6a: upper shell; 6b: lower shell; 6c: positive terminal receiving part; 6d: negative terminal receiving part; 6e: control terminal receiving part; 6f, 6g: rail receiving part; 6h: step part; 6i: hook part; 6j: rear corner part; 7: fixing screw; 8: controller; 10: tool body; 11: body shell; 11L: left split shell; 11R: right split shell; 11a: body side Concave part (front side); 11b: main body side concave part (rear side); 11c: upper wall; 11d: lower wall; 11e: front wall; 11f: upper wall; 11g: lower wall; 11h: rear wall; 11i: guide receiving part; 12: cylinder; 13: piston; 14: pressure storage chamber; 15: machine head; 16: driver guide; 16a: front guide; 16b: rear guide; 16c: driving passage; 17: contact arm; 17a: dial; 17b: compression spring; 18: ejection port; 19: downward moving end shock absorber; 20: nail magazine; 21: nail magazine body; 23: pusher; 30: lifting mechanism; 31 : motor; 32: reduction gear train; 32a: output shaft; 33: wheel; 33a: avoidance area; 34: engaging portion; 34F: initial engaging portion; 34E: final engaging portion; 35: mechanism housing; R: rotation direction of wheel 33; 40: battery holder; 40H: holder body; 40L: left split holder; 40R: right split holder; 40a: locking recess; 40b: limiting plate; 40c: holder; 41: upper and lower extensions; 41a: guide; 42: lower portion of holder; 43: coupling screw; 44: side recess of holder (lower side); 44a: front wall; 4 4b: rear wall; 44c: upper wall; 45: side recess of retainer (upper side); 45a: front wall; 45b: rear wall; 45c: lower wall; 46: front limiting portion; 50: first elastic body; 50a: fragile portion; 50b: first portion; 50c: second portion; 51: terminal; 51a: base portion; 51b: positive terminal; 51c: negative terminal; 51d: control terminal; 51e: lower rail; 51f: upper rail; 52: sliding rail; 55: second elastic body; 60: main body extension portion; 61: third elastic body; G: direction of gravity; G0: center of gravity of the power tool; S: impact when falling, etc. DETAILED DESCRIPTION

[0008] In one or more embodiments, the third elastic body is elastically deformed after the first elastic body is elastically deformed, for example, by displacement of the battery holder relative to the tool body.

[0009] Therefore, after the first elastic body is elastically deformed, the third elastic body is elastically deformed to absorb vibration and impact of the battery.

[0010] In one or more embodiments, for example, the first elastic body is held so as to straddle a main body-side recess provided in the tool main body and a holder-side recess provided in the battery holder.

[0011] Therefore, the first elastic body is held in the recessed portion. Accordingly, the vibration reduction effect can be further improved by using a larger elastic body or increasing the number of locations where the elastic body is arranged, without causing an increase in the size of the electric tool.

[0012] In one or more embodiments, for example, upper and lower walls are provided on both the main body side recess and the retainer side recess to limit the displacement of the first elastic body in the upper and lower directions. For example, a front wall is provided on one of the main body side recess and the retainer side recess to limit the displacement of the first elastic body in the forward direction, and a rear wall is provided on the other to limit the displacement of the first elastic body in the rearward direction.

[0013] Therefore, the displacement of the first elastic body in the vertical direction and the displacement in the front-rear direction is restricted. According to this, the vibration and impact of the battery holder in the vertical direction and the front-rear direction are absorbed by the elastic deformation of the first elastic body.

[0014] In one or more embodiments, for example, the first elastic body has a first part held by the tool body, a second part held by the battery holder, and a fragile part arranged between the first part and the second part and easier to undergo elastic deformation than the first part and the second part.

[0015] Therefore, the fragile portion is easily elastically deformed, and the battery holder is displaced relative to the tool body to efficiently absorb vibration and shock of the battery.

[0016] In one or more embodiments, for example, a guide portion is provided, the guide portion supporting the battery holder so as to be displaceable in the vertical direction relative to the tool body. The first elastic body is provided on the front side and the rear side of the guide portion, respectively.

[0017] Therefore, the first elastic body is more efficiently elastically deformed in the front-rear direction to efficiently absorb vibration and shock of the battery holder and the battery.

[0018] In one or more embodiments, for example, an upper restricting portion that restricts upward displacement of the battery holder is provided on the tool body.

[0019] Therefore, for example, when the electric tool is dropped, the rear side of the battery holder is restricted from being displaced upward. Accordingly, when the electric tool is dropped, the battery holder is smoothly displaced forward to efficiently absorb the impact on the battery.

[0020] In one or more embodiments, for example, as the first elastic body, there is a first elastic body on the front side and a first elastic body on the rear side. For example, the first elastic body on the front side has a front portion held by the tool body and a rear portion held by the battery holder. For example, the first elastic body on the rear side has a rear portion held by the tool body and a front portion held by the battery holder.

[0021] Therefore, the two front and rear battery holder side holders are arranged between the two front and rear tool body side holders. Accordingly, the two front and rear battery holder side holders are compactly arranged.

[0022] In one or more embodiments, for example, the tool body has a main body housing having a left-right split structure.

[0023] Therefore, the battery holder is sandwiched and held between the main body cases of the left-right split structure. This improves the assemblability of the battery holder to the main body cases.

[0024] In one or more embodiments, for example, the electric tool is a driving tool having a driver and a motor, wherein the driver moves in a driving direction to strike the driven object; and the motor serves as a driving source to generate power for moving the driver in the driving direction.

[0025] Therefore, in the electric driving tool, the vibration resistance and impact resistance of the battery are further improved. [Example]

[0026] In the embodiment of the present invention, as an example of the electric tool 1, a gas spring type driving tool using the air pressure of the pressure storage chamber above the air cylinder as the thrust for driving the driving member t is exemplified. The driving member t is, for example, a rod-shaped nail. In the following description, the driving direction of the driving member t is defined as the downward direction, and the direction opposite to the driving direction is defined as the upward direction. The user of the electric tool 1 Figure 1 The center is located on the right side of the electric tool 1 (handle 3 side). The side near the user is defined as the rear direction (user side), and the side opposite to the near side is defined as the front direction. The left-right direction is based on the user holding the handle 3.

[0027] like Figures 1 to 3As shown, the electric tool 1 has a tool body 10. The tool body 10 has a main body shell 11 made of resin. The main body shell 11 has a left-right split structure in which left and right split shells 11L and 11R are facing each other and screwed together. A cylinder 12 is housed in the main body shell 11. A piston 13 is housed in the cylinder 12 so as to be reciprocatingly movable up and down. A long-shaped driver 2 is coupled to the center of the lower surface of the piston 13. The lower side of the driver 2 enters into the driving passage 16c described later. The upper part of the cylinder 12 above the piston 13 is connected to the pressure storage chamber 14. Compressed gas such as air is sealed in the pressure storage chamber 14. The air pressure of the pressure storage chamber 14 acts as a thrust to move the upper surface of the piston 13 downward.

[0028] A machine head 15 is provided at the lower part of the tool body 10. The machine head 15 has a driver guide 16 and a contact arm 17. The driver guide 16 has a front guide 16a at the front side and a rear guide 16b at the rear side. The front guide 16a and the rear guide 16b are combined with each other to form the driver guide 16. A driving passage 16c is formed between the front guide 16a and the rear guide 16b. The driving passage 16c is connected to the inner peripheral side of the cylinder 12. The driver 2 enters the driving passage 16c in a manner that it can reciprocate up and down.

[0029] A contact arm 17 is supported around the driver guide 16 so as to be displaceable up and down. The contact arm 17 extends upward from around the lower end (ejection port 18) of the driver guide 16. Figure 2 As shown in FIG. 1 , the contact arm 17 is urged toward the lower disconnected position side by the compression spring 17 b. In the disconnected position, the lower end of the contact arm 17 is located below the ejection port 18.

[0030] By pressing the contact arm 17 onto the driven material W and moving it upward (on operation), the triggering operation of the switch operating lever 4 becomes effective. A dial 17a for adjusting the driving depth is provided below the compression spring 17b. By rotating the operating dial 17a, the disconnected position of the contact arm 17 can be moved up and down. Accordingly, the stroke of the contact arm 17 is changed, thereby changing the position of the ejection port 18 relative to the driven material W during the on operation. Accordingly, the driving depth of the driving member t into the driven material W is switched.

[0031] like Figure 1 As shown, a nail magazine 20 is combined with the rear surface side of the machine head 15. A plurality of driving pieces t are loaded in the nail magazine 20. The nail magazine 20 has a nail magazine body 21 for accommodating the plurality of driving pieces t, and a pusher 23 for pressing the accommodated driving pieces t toward the driving passage 16c of the machine head 15. One driving piece t pressed by the pusher 23 and supplied from the inside of the nail magazine body 21 to the driving passage 16c is struck by the driving device 2 moving downward and ejected from the ejection port 18.

[0032] A grip 3 for the user to hold is provided on the rear surface side of the tool body 10. The grip 3 has a split structure in which left and right grip shells 3L and 3R are provided integrally with the main body shell 11 and face each other and are screwed together. A switch operating lever 4 for starting is provided on the front lower surface of the grip 3, which is operated by the user's fingertips. Figure 3 As shown, a switch main body 4a is installed above the switch operating rod 4. When the switch operating rod 4 is pulled upward, the switch main body 4a is turned on. When the switch main body 4a is turned on, power is supplied to the lifting mechanism 30 described later.

[0033] like Figure 3 As shown, a battery mounting portion 5 is provided at the rear of the handle 3. A battery 6 is mounted on the battery mounting portion 5. The battery 6 is mounted on the battery mounting portion 5 by sliding downward. The mounted battery 6 is removed from the battery mounting portion 5 by sliding upward. The battery 6 can be repeatedly used by being removed from the battery mounting portion 5 and charged with a separately prepared charger. The battery 6 has the versatility to be used as a power source for other electric tools. The motor 31 of the lifting mechanism 30 operates using the electric power of the battery 6 as a power source.

[0034] A rectangular flat controller 8 is installed in the battery mounting portion 5. The controller 8 is arranged along the front surface side of the mounted battery 6. By turning on the switch operating lever 4 and the contact arm 17, the lifting mechanism 30 is operated and the driving operation is started. The controller 8 mainly controls the operation of the motor 31 of the lifting mechanism 30.

[0035] like Figure 2 As shown, at the lower part of the cylinder 12, a downward moving end shock absorber 19 for absorbing the impact of the downward moving end of the piston 13 is arranged. The lower side of the driver 2 enters the driving passage 16c through the inner peripheral side of the downward moving end shock absorber 19. The driver 2 moves downward in the driving passage 16c due to the air pressure of the pressure storage chamber 14 acting on the upper surface of the piston 13. The top end (lower end) of the driver 2 moving downward in the driving passage 16c strikes a driving member t supplied to the driving passage 16c. The piston 13 reaches the downward moving end and the struck driving member t is ejected from the ejection port 18. The ejected driving member t is driven into the driven material W.

[0036] A lifting mechanism 30 is provided below the handle 3. The lifting mechanism 30 has an electric motor 31 as a driving source. In front of the electric motor 31, a wheel portion 33 is supported by a reduction gear train 32. The wheel portion 33 is covered by a mechanism housing 35. The driver 2 and the piston 13 that have reached the downward moving end are returned to the upper standby position (in the opposite direction to the driving direction of the driven part t) by the lifting mechanism 30. The wheel portion 33 is supported by an output shaft 32a of the reduction gear train 32. The wheel portion 33 is moved along Figure 2 The direction (counterclockwise rotation direction in the figure) shown in the middle arrow R rotates. Accordingly, the driver 2 returns upward (in the direction opposite to the driving direction).

[0037] For example, nine engaging parts 2a are provided on the right side of the driver 2. Each engaging part 2a has a rack tooth shape protruding to the right. The plurality of engaging parts 2a are arranged at regular intervals in the longitudinal direction (up and down direction) of the driver 2. The wheel part 33 of the lifting mechanism 30 engages with the plurality of engaging parts 2a in sequence.

[0038] A wheel portion 33 is disposed on the right side of the driver 2. The wheel portion 33 has, for example, nine engaging portions 34 that are sequentially engaged with the engaging portion 2a of the driver 2. Each engaging portion 34 uses a cylindrical shaft member. The nine engaging portions 34 are disposed at a certain interval along the outer periphery of the wheel portion 33. The engaging portion 34 that first engages with the engaging portion 2a of the driver 2 that reaches the downward moving end due to the rotational action of the wheel portion 33 in the direction of the arrow R is marked with the reference numeral 34F, and the engaging portion 34 that engages last is marked with the reference numeral 34E to distinguish them according to needs. In the stage where the driver 2 moves from the standby position to the upward moving end position and then releases the engagement of the driver 2, a large load is applied to the engaging portion 34E that engages last. Therefore, it is particularly necessary to fully lubricate the last engaging portion 34E.

[0039] The motor 31 is started to rotate the wheel 33 in the direction of the arrow R. After the driver 2 reaches the downward movement end due to the driving action, the wheel 33 rotates in the direction of the arrow R, and the engaging portion 34 engages with the engaging portion 2a of the driver 2 from below in sequence, thereby the driver 2 returns upward. The piston 13 returns upward through the lifting mechanism 30, thereby increasing the air pressure in the pressure storage chamber 14. When the driver 2 returns to the bottom, the piston 13 moves upward. Figure 2 When the motor 31 reaches the standby position shown (the position where the last engagement portion 34E is engaged with the engagement portion 2a of the driver 2), the motor 31 stops and a series of driving operations are completed.

[0040] When the switch lever 4 is pulled again, the lifting mechanism 30 is activated again. As a result, the wheel portion 33 starts to rotate in the direction of arrow R, thereby the driver 2 and the piston 13 are further raised upward from the standby position. As a result, the last engaging portion 34E leaves the engaging portion 2a of the driver 2.

[0041] A large gap is provided in the rotation direction between the first engaging portion 34F and the last engaging portion 34E of the wheel portion 33 in the rotation direction indicated by the arrow R in the figure (there is no escape area 33a of the engaging portion 34). When the wheel portion 33 rotates in the direction of the arrow R and the escape area 33a is brought toward the driver 2, the engagement state of all the engaging portions 2a of the wheel portion 33 and the driver 2 is released. Accordingly, the piston 13 and the driver 2 move downward due to the air pressure of the pressure accumulator chamber 14 acting on the piston 13. The driver 2 moves downward in the driving passage 16c, strikes the driving piece t, and drives it into the driven material W.

[0042] like Figures 3 to 5 As shown in FIG. 1 , the battery holder 40 is supported by the battery mounting portion 5 . The battery 6 is mounted on the battery mounting portion 5 via the battery holder 40 . The battery holder 40 is supported by the battery mounting portion 5 via four first elastic bodies 50 .

[0043] like Figures 4 to 7 As shown, the battery holder 40 has a holder body 40H and a terminal 51. The holder body 40H has an upper and lower extension portion 41 extending in the up-down direction and a holder lower portion 42 extending in the front-back direction. The holder lower portion 42 is integrally provided in a manner extending rearward from the lower portion of the upper and lower extension portion 41. The holder lower portion 42 is provided in a manner facing the front surface of the installed battery 6. The holder body 40H has a left and right split structure. The left split holder 40L on the left side and the right split holder 40R on the right side are integrated by being connected to each other at two locations in the front and back by connecting screws 43.

[0044] Guide portions 41a are provided on both left and right sides of the vertical extension portion 41. The left and right guide portions 41a extend long in the vertical direction. Fig. 9 As shown, a guide receiving portion 11i is provided on the inner surface of the main body housing 11 to receive the left and right guide portions 41a of the battery holder 40. The guide receiving portions 11i are arranged to face each other. The left and right guide portions 41a are respectively received by the guide receiving portions 11i, thereby supporting the battery holder 40 to be displaceable in the up-down direction (the direction of installation and removal of the battery 6) relative to the main body housing 11.

[0045] The first elastic bodies 50 are held on the lower and upper sides of the left and right guide portions 41a, respectively. A total of four first elastic bodies 50 are held two each in the front and rear of the left and right sides by the same structure. The four first elastic bodies are made of elastic rubber and are formed into a substantially rectangular parallelepiped shape (hexahedron).

[0046] like Figures 4 to 7As shown, two retainer side recesses 44 and 45 are provided on the right side of the upper and lower extensions 41. The lower retainer side recess 44 has a front wall 44a, a rear wall 44b and an upper wall 44c, and is in a U-shape that opens downward. The upper retainer side recess 45 has a front wall 45a, a rear wall 45b and a lower wall 45c, and is in a U-shape that opens upward.

[0047] The upper portion (second portion 50c) of the lower first elastic body 50 is held in the lower retainer side recess 44. The lower portion (second portion 50c) of the upper first elastic body 50 is held in the upper retainer side recess 45. The upper and lower first elastic bodies 50 are arranged upside down. Therefore, the first portion 50b and the second portion 50c of the first elastic body 50 are upside down in the lower first elastic body 50 and the upper first elastic body 50.

[0048] like Fig. 9 As shown, two main body side recesses 11a and 11b are respectively provided on the inner surface (tool body 10 side) of the left and right split shells 11L and 11R. The two main body side recesses 11a and 11b are separated and arranged up and down. The main body side recess 11a on the lower side has a front wall 11c, a rear wall 11d and a lower wall 11e, and is in a U-shape that opens upward. The main body side recess 11b on the upper side has a front wall 11f, a rear wall 11g and an upper wall 11h, and is in a U-shape that opens downward.

[0049] like Figure 7 As shown, the lower portion (first portion 50b) of the lower first elastic body 50 is held by the lower main body side recess 11a. The upper portion (first portion 50b) of the upper first elastic body 50 is held by the upper main body side recess 11b. The first elastic body 50 is held in a manner that straddles the main body side recess 11a (11b) provided in the tool main body 10 and the holder side recess 44 (45) provided in the battery holder 40.

[0050] The first elastic body 50 on the lower side is sandwiched between the front wall 11c and the rear wall 11d of the main body side recess 11a and between the front wall 44a and the rear wall 44b of the retainer side recess 44 to restrict displacement in the front-rear direction. The first elastic body 50 on the upper side is sandwiched between the front wall 11f and the rear wall 11g of the main body side recess 11b and between the front wall 45a and the rear wall 45b of the retainer side recess 45 to restrict displacement in the front-rear direction.

[0051] The first elastic body 50 on the lower side is restricted from being displaced downward by the lower wall 11e of the lower body-side recess 11a. The first elastic body 50 on the lower side is restricted from being displaced upward by the upper wall 44c of the lower retainer-side recess 44. The first elastic body 50 on the upper side is restricted from being displaced upward by the upper wall 11h of the upper body-side recess 11b. The first elastic body 50 on the upper side is restricted from being displaced downward by the lower wall 45c of the upper retainer-side recess 45.

[0052] A fragile portion 50a that is more easily elastically deformed than the first portion 50b and the second portion 50c is provided between the first portion 50b of the first elastic body 50, which is held on the tool body 10 side, and the second portion 50c, which is held on the battery holder 40 side. In this embodiment, a groove portion serving as the fragile portion 50a is provided on the side surface between the first portion 50b and the second portion 50c. The first elastic body 50 is easily elastically deformed by the fragile portion 50a, thereby making it easier for the battery holder 40 to be displaced downward in the mounting direction.

[0053] like Figure 4 , Fig. 9 As shown, the inner surfaces of the left and right split housings 11L and 11R are provided with front restricting portions 46 that mainly restrict the upper portion of the battery holder 40 from moving forward. The left and right front restricting portions 46 are provided to extend vertically in front of the vertically extending portion 41 of the battery holder 40.

[0054] like Figure 8 As shown in FIG. 1 , the rear surface side of the upper and lower extensions 41 of the holder body 40H supports the terminal 51. Sliding rails 52 are provided on the left and right sides of the terminal 51 to guide the battery 6 to move relative to the battery holder 40. Fig.10 6 is shown as a single body in the figure. The battery 6 is a lithium-ion battery in a sliding installation form, and has a roughly hexahedral box shape. The battery 6 has an upper shell 6a on the front side and a lower shell 6b on the rear side. The upper shell 6a has a roughly flat plate shape, and the lower shell 6b has a shell with an open front. The upper shell 6a is combined with the front of the lower shell 6b to block the opening of the lower shell 6b. The upper shell 6a has a function as a cover that blocks the opening of the lower shell 6b.

[0055] The upper housing 6a is provided with a positive terminal receiving portion 6c and a negative terminal receiving portion 6d. A plurality of battery cells (not shown) are accommodated in the lower housing 6b. A control terminal receiving portion 6e for transmitting and receiving control signals is provided between the positive terminal receiving portion 6c and the negative terminal receiving portion 6d.

[0056] A pair of left and right rail receiving parts 6f and 6g are provided on the upper shell 6a. A right rail receiving part 6g is provided on the right side of the positive terminal receiving part 6c. A left rail receiving part 6f is provided on the left side of the negative terminal receiving part 6d. The sliding rail 52 of the battery holder 40 slides in a manner of entering in front of the left and right rail receiving parts 6f and 6g, thereby the battery 6 is installed in the battery installation part 5. The sliding rail 52 enters in front of the rail receiving parts 6f and 6g respectively, thereby limiting the displacement of the battery 6 in the forward direction (direction orthogonal to the installation direction).

[0057] A step portion 6h is integrally provided at the upper portion of the upper shell 6a. The step portion 6h protrudes forward. When viewed from the side, the step portion 6h has a roughly mountain shape. A hook portion 6i is provided on the lower surface side of the step portion 6h. The hook portion 6i is provided in a manner that it can be displaced forward and backward relative to the step portion 6h. The hook portion 6i is urged by a spring toward the locking position side so that it protrudes forward. By overcoming the spring force and pressing an unlocking button (not shown in the figure) provided on the upper surface side of the step portion 6h, the hook portion 6i can be pressed to the rearward unlocking position. By inserting the hook portion 6i into the locking recess 40a (refer to Figure 5 , Figure 8 ), the battery 6 is locked in the installed position.

[0058] The terminal 51 has a base portion 51a, a positive terminal 51b, a negative terminal 51c and a control terminal 51d. A lower rail 51e is provided at the lower portion of the base portion 51a, and an upper rail 51f is provided at the upper portion. The lower rail 51e abuts against a limiting plate 40b provided at the lower portion of the battery holder 40 from the rear surface side. The upper rail 51f is held by a holder 40c provided at a fork at the upper portion of the battery holder 40. Accordingly, the terminal 51 is supported in a manner that allows it to move up and down. By sliding the battery 6 downward relative to the terminal 51 supported in a manner that allows it to move up and down, the positive terminal 51b is connected to the positive terminal receiving portion 6c of the battery 6, and the negative terminal 51c is connected to the negative terminal receiving portion 6d of the battery 6. Accordingly, the battery 6 is electrically connected to the battery mounting portion 5.

[0059] The terminal 51 is urged in the direction of returning upward by the two left and right second elastic bodies 55. A compression spring is used for the second elastic body 55. The two second elastic bodies 55 are arranged between the base portion 51a and the battery holder 40. In the normal use position of the terminal 51, the loading force of the second elastic body 55 does not work. For example, in the case where a large impact is applied to the battery 6 due to the electric tool 1 falling, when the terminal 51 exceeds the normal use position and moves downward to a large extent, the loading force of the second elastic body 55 acts on the terminal 51. Accordingly, the terminal 51 returns to the normal use position.

[0060] like Figure 4, Figure 5 , Fig. 9 As shown, a main body extension portion 60 is provided at the rear portion of the main body shell 11. The main body extension portion 60 extends forward of the holder lower portion 42 of the battery holder 40. A third elastic body 61 made of elastic resin is installed on the upper surface of the main body extension portion 60. A plurality of third elastic bodies 61 are installed so as to cover a large area of ​​the upper surface of the main body extension portion 60. The third elastic body 61 is arranged in an abutting state with respect to the holder lower portion 42 with almost no gap. For example, when a large impact is applied to the battery 6 when the electric tool 1 falls, the holder lower portion 42 abuts against the third elastic body 61 to absorb most of the impact.

[0061] The third elastic body 61 is made of a material having a higher elastic modulus than the first elastic body 50. Therefore, when the electric tool 1 is dropped, the first elastic body 50 is elastically deformed first to displace the battery holder 40. After the battery holder 40 is displaced due to the elastic deformation of the first elastic body 50, the holder lower portion 42 of the battery holder 40 abuts against the third elastic body 61 to absorb the impact.

[0062] Fig.11 A state where the electric power tool 1 has fallen onto a floor surface F is shown. Fig.11 The reference symbol G0 in the figure indicates the approximate center of gravity position of the power tool 1 in the state where the battery 6 is installed in the battery installation part 5. As shown in the figure, when the rear corner 6j of the lower shell 6b of the battery 6 freely falls in the gravity direction G with the rear corner 6j facing downward, it is assumed that the rear corner 6j first collides with the floor surface F. Since the center of gravity G0 of the power tool 1 is located on or near the vertical line passing through the rear corner 6j at the time of the collision, an impact load generated by the entire weight of the power tool 1 is applied to the rear corner 6j of the battery 6. This impact load acts on the battery 6 as an impact S in the direction of the hollow arrow (installation direction).

[0063] The battery 6 is displaced downward by the impact S when it is dropped. The battery 6 is displaced downward relative to the battery mounting portion 5, and accordingly, the battery holder 40 is displaced downward relative to the battery mounting portion 5 while elastically deforming the first elastic body 50. As the battery 6 is displaced downward relative to the battery mounting portion 5, the terminal 51 is displaced downward relative to the holder body portion 40H while elastically deforming the second elastic body 55.

[0064] When the battery holder 40 is displaced downward relative to the battery mounting portion 5, the holder lower portion 42 abuts against the third elastic body 61. Accordingly, the impact S during the drop is absorbed by the elastic deformation of the third elastic body 61. Thus, for example, when the electric tool 1 is dropped, on the one hand, the battery holder 40 and the terminal 51 are allowed to displace downward, and on the other hand, the holder lower portion 42 of the battery holder 40 abuts against the third elastic body 61 to absorb most of the impact S.

[0065] Therefore, the impact S applied to the battery 6 when dropped or the like is absorbed by the lower housing 6b side contacting the third elastic body 61, and is not applied to the upper housing 6a that is mechanically and electrically connected to the battery holder 40 and the terminal 51. Therefore, the shear force acting on the battery 6 in the direction of separating the upper housing 6a and the lower housing 6b in the vertical direction when dropped or the like is greatly suppressed. Thus, damage to the battery cell is avoided and the durability of the battery 6 is improved.

[0066] The battery holder 40 displaced downward by the impact S returns to the normal use position by the biasing force of the first elastic body 50 . In addition, the terminal 51 displaced downward by the impact returns to the normal use position by the biasing force of the second elastic body 55 .

[0067] According to the embodiment, the battery holder 40 is supported so as to be displaceable in the battery installation direction relative to the tool body 10, and a first elastic body 50 is provided between the two. The terminal 51 is supported so as to be displaceable in the battery installation direction relative to the holder body 40H of the battery holder 40, and a second elastic body 55 is provided between the two. A third elastic body 61 is provided between the battery holder 40 and the tool body 10.

[0068] Therefore, the first to third elastic bodies 50, 55, 61 are dispersedly arranged at three locations to reduce the vibration generated by the battery 6 during use and absorb the impact S generated by, for example, when the power tool 1 is dropped. Accordingly, the vibration resistance and impact resistance of the battery 6 are improved without increasing the size of the power tool 1.

[0069] According to the embodiment, after the first elastic body 50 is elastically deformed by the displacement of the battery holder 40 relative to the tool body 10 , the third elastic body 61 is elastically deformed.

[0070] Therefore, after the first elastic body 50 is elastically deformed, the third elastic body 61 is elastically deformed to absorb the vibration and impact of the battery 6 .

[0071] According to the embodiment, the first elastic body 50 is held so as to straddle the body-side recessed portions 11 a and 11 b provided in the body case 11 of the tool body 10 and the holder-side recessed portions 44 and 45 provided in the battery holder 40 .

[0072] Therefore, the first elastic body 50 is embedded and retained in the body-side recesses 11a and 11b and the holder-side recesses 44 and 45. This can further improve the vibration damping effect by using a larger elastic body or increasing the number of locations where the elastic body is disposed, without increasing the size of the electric tool 1.

[0073] According to the embodiment, front and rear walls 11c, 11d, 11f, 11g, 44a, 44b, 45a, 45b for limiting displacement of the first elastic body 50 in the front-rear direction are provided on both the main body side recesses 11a, 11b and the retainer side recesses 44, 45. Lower walls 11e, 45c for limiting downward displacement of the first elastic body 50 are provided on the lower main body side recesses 11a and the upper retainer side recesses 45, respectively. Upper walls 11h, 44c for limiting upward displacement of the first elastic body 50 are provided on the upper main body side recesses 11b and the lower retainer side recesses 44, respectively.

[0074] Therefore, the displacement of the first elastic body 50 in the front-rear direction and the displacement in the up-down direction are restricted.

[0075] According to the embodiment, the first elastic body 50 has a first part 50b held on the tool body 10 side, a second part 50c held on the battery holder 40 side, and a fragile part 50a arranged between the first part 50b and the second part 50c and easier to undergo elastic deformation than the first part 50b and the second part 50c.

[0076] Therefore, the fragile portion 50 a is easily elastically deformed, whereby the battery holder 40 is displaced relative to the tool body 10 to efficiently absorb vibration and shock of the battery.

[0077] According to the embodiment, there is a guide portion 41a, which supports the battery holder 40 in a manner that it can be displaced in the up and down directions (the installation and removal directions of the battery 6) relative to the tool body 10, and the first elastic body 50 is respectively provided on the lower side and the upper side of the guide portion 41a.

[0078] Therefore, the first elastic body 50 is more efficiently elastically deformed in the vertical direction to effectively absorb vibration and shock of the battery holder 40 and the battery 6 .

[0079] According to the embodiment, the tool body 10 is provided with the front restricting portion 46 that mainly restricts the upper side of the battery holder 40 from being displaced forward.

[0080] Therefore, the upper side of the battery holder 40 is restricted from being displaced forward when the electric tool 1 is dropped, etc. As a result, the battery holder 40 smoothly displaces downward to effectively absorb the impact S generated on the battery 6 .

[0081] According to the embodiment, the first elastic body 50 includes a lower first elastic body 50 and an upper first elastic body 50. The lower first elastic body 50 includes a lower portion (first portion 50b) held on the tool body 10 side, and an upper portion (second portion 50c) held on the battery holder 40 side. The upper first elastic body 50 includes an upper portion (first portion 50b) held on the tool body 10 side, and a lower portion (second portion 50c) held on the battery holder 40 side.

[0082] Therefore, the holder side recesses 44 and 45 on the upper and lower battery holder 40 side are arranged between the upper and lower body side recesses 11a and 11b on the upper and lower tool body 10 side. As a result, the upper and lower holder side recesses 44 and 45 are compactly arranged in the vertical direction. As a result, the battery holder 40 is made compact in the vertical direction.

[0083] According to the embodiment, the tool body 10 has the main body case 11 of the left-right split structure, and the battery holder 40 also has the split holders 40L, 40R of the left-right split structure.

[0084] Therefore, the battery holder 40 is sandwiched and held between the half housings 11L and 11R of the left-right split structure. In addition, the terminal 51 is sandwiched and held between the half holders 40L and 40R of the left-right split structure. This improves the assemblability of the battery holder 40 and the terminal 51.

[0085] According to the embodiment, the electric tool 1 is a driving tool, comprising a driver 2, a wheel portion 33 and a motor 31. The driver 2 moves along the driving direction by air pressure to strike the driven part t; the wheel portion 33 returns the driver 2 in the direction opposite to the driving direction; and the motor 31 rotates the wheel portion 33.

[0086] Therefore, in the gas spring type driving tool, by applying the elastic support structure of the battery holder 40 and the terminal 51 interposed with the first to third elastic bodies 50, 55, 61, the vibration resistance and impact resistance of the battery 6 are further improved.

[0087] For example, although the example shows a structure in which the first elastic bodies 50, 50 are arranged at two locations on the left and right sides, it is also possible to arrange one first elastic body on the left and right sides, or to arrange the first elastic body at three or more locations on the left and right sides.

[0088] Although the first elastic body 50 made of rubber is exemplified, a compression spring, for example, may be used as the first elastic body.

[0089] Although the structure in which the first elastic body 50 is held by the main body-side recessed portions 11 a and 11 b and the holder-side recessed portions 44 and 45 in the vertical direction is exemplified, it may be held by the main body-side recessed portions 11 a and 11 b and the holder-side recessed portions 44 and 45 in the vertical direction, it may be held by the main body-side recessed portions 11 a and 11 b and the holder-side recess

[0090] Although the structure in which the groove portion is provided as the fragile portion 50 a is exemplified, a circular recessed portion or a through hole may be provided as the fragile portion.

[0091] Although a gas spring type driving tool is exemplified as the electric tool 1, the elastic support structure of the battery holder 40 based on the first to third elastic bodies 50, 55, and 61 can be applied to the battery mounting portion of a mechanical spring type driving tool that uses the biasing force of a compression spring as the thrust for driving. In addition, the elastic support structure of the battery holder 40 can be applied to an electric pneumatic or flywheel type electric driving tool. In addition, the elastic support structure of the battery holder 40 can be applied to other types of battery-powered electric tools such as drilling tools, grinding tools, screw fastening tools, cutting tools, gardening tools, and hand-held cleaners.

[0092] The electric tool 1 of the embodiment is an example of an electric tool in one embodiment of the present invention. The tool body 10 of the embodiment is an example of a tool body in one embodiment of the present invention. The battery holder 40 of the embodiment is an example of a battery holder in one embodiment of the present invention. The first elastic body 50 of the embodiment is an example of a first elastic body in one embodiment of the present invention.

[0093] The positive terminal 51b and the negative terminal 51c of the embodiment are examples of connection terminals in one embodiment of the present invention. The terminal 51 of the embodiment is an example of a terminal in one embodiment of the present invention. The second elastic body 55 of the embodiment is an example of a second elastic body in one embodiment of the present invention.

[0094] The retainer lower portion 42 of the embodiment is an example of the retainer lower portion in one embodiment of the present invention. The main body extension portion 60 of the embodiment is an example of the main body extension portion in one embodiment of the present invention. The third elastic body 61 of the embodiment is an example of the third elastic body in one embodiment of the present invention.

Claims

1. An electric tool, characterized in that: It has a tool body, a battery holder, a first elastic body, a terminal, a second elastic body and a third elastic body, wherein: The battery holder is supported to be displaceable at least in the up-down direction relative to the tool body; The first elastic body is interposed between the tool body and the battery holder; The terminal is supported so as to be displaceable in the up-down direction relative to the holder body of the battery holder and is provided with a connection terminal; The second elastic body is interposed between the retainer body and the terminal; The third elastic body is provided on the tool body so as to face the lower surface of the battery to be mounted by moving downward from the upper side to the battery holder.

2. The electric tool according to claim 1, characterized in that: The third elastic body is elastically deformed after the battery holder is displaced relative to the tool body and the first elastic body is elastically deformed.

3. The electric tool according to claim 2, characterized in that: The first elastic body is held so as to straddle a main body-side recessed portion provided in the tool main body and a holder-side recessed portion provided in the battery holder.

4. The electric tool according to claim 3, characterized in that: Front and rear walls for limiting displacement of the first elastic body in the front-rear direction are provided on both the main body side recess and the retainer side recess. A lower wall for restricting downward displacement of the first elastic body is provided on one of the main body-side recess and the holder-side recess, and an upper wall for restricting upward displacement of the first elastic body is provided on the other.

5. The electric tool according to any one of claims 1 to 4, characterized in that: The first elastic body includes a first portion held by the tool body, a second portion held by the battery holder, and a fragile portion provided between the first portion and the second portion and more easily elastically deformed than the first portion and the second portion.

6. The electric tool according to any one of claims 1 to 5, characterized in that: A guide portion is provided for supporting the battery holder so as to be displaceable in the up-down direction relative to the tool body. The first elastic body is interposed between the lower side and the upper side of the guide portion.

7. The electric tool according to any one of claims 1 to 6, characterized in that: The tool body is provided with a front restriction portion for restricting the forward displacement of the battery holder.

8. The electric tool according to any one of claims 1 to 7, characterized in that: As the first elastic body, there are the first elastic body on the lower side and the first elastic body on the upper side, The first elastic body on the lower side has a lower portion held by the tool body and an upper portion held by the battery holder. The first elastic body on the upper side has an upper portion held by the tool body and a lower portion held by the battery holder.

9. The electric tool according to any one of claims 1 to 8, characterized in that: The tool body comprises a main body shell with a left-right split structure.

10. The electric tool according to any one of claims 1 to 9, characterized in that: A driver and a motor are provided, wherein: The driver moves along the driving direction to strike the driven part; The motor serves as a driving source that generates power for moving the driver in the driving direction.

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