JP2014087903A - Electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the sealability of a sealing object space in which an apparatus side terminal and a battery side terminal are provided.SOLUTION: An electric apparatus includes an apparatus body 11 having an attachment part 14 where a battery pack 27 having a battery side terminal 34 connected with a battery cell 21 may be attached and detached and a terminal holder 20 provided at the attachment part 14 and holding an apparatus side terminal 23 connected with the battery side terminal 34. The terminal holder 20 and the attachment part 14 respectively include a recessed part 20a and a protruding part 14a which engage with each other. A seal member 54 which contacts with the terminal holder 20 and the attachment part 14 at portions other than the protruding part 14a and the recessed part 20a is provided in the electric apparatus.

Description

  The present invention relates to an electric device including a device main body and a battery pack that can be attached to and detached from the device main body.

  2. Description of the Related Art Conventionally, an electric device having a device main body and a battery pack that can be attached to and detached from the device main body is known. The electric tool as an electric device described in Patent Document 1 includes a tool main body (equipment main body) and a hammer case. The tool body has a cylindrical shape, and the hammer case is fixed to the open end of the tool body. The tool body has a grip, and a battery pack that can be attached to and detached from the grip is provided. A motor is provided inside the tool body. The electric power tool described in Patent Document 1 is intended to ensure sealing performance, and rubber is provided in the cylindrical portion of the grip. This rubber serves as a seal.

JP 2002-254356 A

  By the way, although not described in Patent Document 1, a device-side terminal is provided on the grip of the tool body, and the device-side terminal is electrically connected to the motor. Moreover, the battery cell is accommodated in the inside of a battery pack, and a battery pack has the battery side terminal connected to the battery cell. When the battery pack is attached to the grip, the device side terminal and the battery side terminal are connected.

  However, although the rubber described in Patent Document 1 is provided in the cylinder portion of the grip, it does not reach the space to be sealed in which the device-side terminal and the battery-side terminal are provided.

  An object of the present invention is to provide an electrical device capable of ensuring the sealing performance of a space to be sealed provided with a device side terminal provided in a device main body and a battery side terminal provided in a battery pack. There is.

  An electrical device of the present invention holds a mounting part to which a battery pack having a battery side terminal connected to a battery cell can be attached and detached, and a device side terminal provided in the mounting part and connected to the battery side terminal An electrical apparatus having an apparatus main body having an apparatus-side holding member to be operated, wherein the apparatus-side holding member and the mounting part have an engaging part that engages with each other, and the engaging part is provided The seal member which contacts the said apparatus side holding member and the said mounting part was provided in places other than.

  An electric device according to an embodiment is an electric device including a device main body having a device-side terminal connected to the battery-side terminal to which a battery pack having a battery-side terminal connected to a battery cell can be attached and detached. In the state where the battery pack is attached to the device main body, a seal that prevents foreign matter from entering the connection portion between the battery side terminal and the device side terminal from at least the battery pack side and the device main body side. A member is provided.

  An electric device according to another embodiment is an electric device having a battery pack and a device main body to which the battery pack is attached and detached, and the battery pack includes a housing case that houses a battery cell, and the battery cell. A battery-side terminal connected to the housing case, a holding member that is provided inside the housing case and holds the battery-side terminal, a terminal insertion hole that is provided in the housing case and into which the battery-side terminal is inserted. A terminal holder provided in the device main body, a device side terminal provided in the terminal holder and connected to the battery side terminal when the battery pack is attached to the device main body, and the battery When the pack is attached to the device main body, a space to be sealed is formed between the battery pack and the device main body, and the battery side terminal and the device side terminal are disposed. Characterized in that it comprises a first seal member for sealing between said terminal holder and the apparatus main body, and a second sealing member provided between the holding member and the housing case.

  According to the electrical device of the present invention, when the battery pack is attached to the device body, the first seal member seals between the device body and the terminal holder. The second seal member seals between the device main body and the battery pack. Furthermore, the third seal member seals between the housing case and the holding member.

It is a perspective view which shows the state by which the electric tool of 1st Embodiment or 2nd Embodiment of this invention was assembled. It is a perspective view before assembling the electric tool of 1st Embodiment or 2nd Embodiment of this invention. It is a perspective view which shows the mounting part of the electric tool in 1st Embodiment of this invention. It is a perspective view which shows the state which divided | segmented the tool main body of the electric tool in 1st Embodiment of this invention. It is a perspective view which shows the state which divided | segmented the tool main body of the electric tool in 1st Embodiment of this invention. It is the perspective view which decomposed | disassembled the battery pack attached to the electric tool in 1st Embodiment of this invention. It is a top view of the circuit board of the battery pack shown in FIG. It is a bottom view of the cover of the battery pack shown in FIG. It is a perspective view which shows the state which the sealing member contacted the battery pack shown in FIG. It is a partial front sectional view of the battery pack shown in FIG. It is a perspective view of the battery pack attached to the electric tool of 2nd Embodiment of this invention. It is a disassembled perspective view of the battery pack shown in FIG. It is a fragmentary sectional view showing an electric tool of a 2nd embodiment of the present invention. It is sectional drawing of the mounting part of the electric tool shown in FIG.

  Hereinafter, embodiments of an electric apparatus according to the present invention will be described in detail with reference to the drawings. In the following embodiments, an electric tool included in an electric device will be described as an example.

(First embodiment)
The electric power tool 10 shown in FIGS. 1 and 2 has a tool body 11 formed of a resin material. The tool body 11 includes a casing 12, a grip 13, and a mounting portion 14. The casing 12 is configured in a cylindrical shape, and an electric motor M is provided inside the casing 12. The electric motor M has a rotating shaft (not shown) that rotates about the axis A. A tip tool 49 can be attached to and detached from one end of the casing 12. Further, a power transmission mechanism (not shown) for transmitting the power of the electric motor M to the tip tool 49 is provided in the casing 12. The power transmission mechanism includes a structure that converts the rotational motion of the rotating shaft of the electric motor M into a rotational motion of the tip tool 49, a structure that converts it into a motion that strikes while rotating the tip tool 49, and a rotational motion of the electric motor M. It has at least one structure among the structures converted into the reciprocating motion of the tip tool 49. The tip tool 49 rotates, rotates or reciprocates around the axis A. That is, the electric power tool 10 includes an impact driver, a drill, a driver, a hammer, a hammer drill, a hammer driver, and the like.

  The grip 13 is formed continuously with the casing 12 and protrudes from the casing 12 in a predetermined direction. The protruding direction of the grip 13 is a direction intersecting the axis A within a plane including the axis A. A circuit board (not shown) electrically connected to the electric motor M is provided, and the circuit board is disposed inside the grip 13. The mounting portion 14 is provided at an end portion in the protruding direction of the grip 13. The casing 12, the grip 13, and the mounting portion 14 are integrally formed of a resin material or the like. Further, as shown in FIG. 3, the tool body 11 has two component pieces 11a divided along a dividing surface (partition line) 11d, and the tool body 11 is assembled by connecting and fixing the two component pieces 11a. It has been. The axis A is located in the dividing surface 11d, and the dividing surface 11d is located across the casing 12, the grip 13, and the mounting portion 14. Further, the two component pieces 11a have a shape and a configuration that are substantially symmetrical with respect to the dividing surface 11d. That is, the casing 12, the grip 13, and the mounting portion 14 have a symmetrical shape and structure with the dividing surface 11d therebetween.

  A ventilation hole 12a is formed in the casing 12, and the inside and the outside of the casing 12 communicate with each other through the ventilation hole 12a. The vent hole 12 a is an air passage for cooling the electric motor M. As shown in FIGS. 3 and 4, the mounting portion 14 is provided with a first partition wall 15 and a second partition wall 16. The first partition wall 15 and the second partition wall 16 are extended in a direction substantially perpendicular to the dividing surface 11d. That is, the first partition wall 15 and the second partition wall 16 extend substantially parallel to the axis A. An opening 17 is provided in the mounting portion 14. An internal space B is formed from the mounting portion 14 to the grip 13. The internal partition B and the opening 17 are partitioned by the first partition wall 15 and the second partition wall 16.

  An attachment hole (not shown) is provided between the first partition wall 15 and the second partition wall 16 in the mounting portion 14. The mounting hole is formed by two component pieces 11a. The mounting hole is provided for mounting a terminal holder (terminal holder) 20 as a device-side holding member.

  On the other hand, ribs 18 are formed on the inner periphery of the first partition wall 15 and the second partition wall 16 that form attachment holes. The rib 18 is formed in an annular shape across the two component pieces 11a. The terminal holder 20 is indirectly supported by the rib 18. The terminal holder 20 is integrally formed of a resin material. A seal member 22 is attached to the outer periphery of the terminal holder 20. The seal member 22 is integrally formed of a rubber-like elastic body. An annular outer groove 22 b is formed on the outer periphery of the seal member 22. An annular seal lip 22 c is formed over the entire circumference of the seal member 22. The terminal holder 20 and the seal member 22 are integrated with an adhesive. Note that the terminal holder 20 and the seal member 22 can be integrated by two-layer molding.

  Further, the rib 18 is fitted into the outer groove 22 b of the seal member 22, and the seal member 22 is fixed to the mounting portion 14. Thus, the terminal holder 20 is sandwiched and fixed via the seal member 22 by the ribs 18 provided on the two component pieces 11a. In a state where the terminal holder 20 is fixed to the mounting portion 14, the seal lip 22 c of the seal member 22 is positioned on the opening 17 side.

  As shown in FIGS. 3 and 4, a plurality of device side terminals (terminals) 23 are embedded in the terminal holder 20. The some apparatus side terminal 23 is comprised with the electroconductive metal material. Further, in a state where the terminal holder 20 is fixed to the mounting portion 14, one end 23 b of the plurality of device side terminals 23 is located in the space B, and the other end 23 a of the plurality of device side terminals 23 is located in the opening 17. ing. One end 23 b of the device side terminal 23 is electrically connected to the circuit board in the grip 13. The other end 23a of the plurality of device side terminals 23 has a plate shape, and the other end 23a of the plurality of device side terminals 23 is extended in a direction along the dividing surface 11d of the two component pieces 11a. .

  The mounting portion 14 has two guide grooves 24 provided on both sides of the opening 17 as shown in FIGS. 3 and 4. One guide groove 24 is provided in each of the two component pieces 11a. The two guide grooves 24 are extended in the direction along the axis A, and the two guide grooves 24 are parallel to each other. Further, the mounting portion 14 is provided with a convex portion 25. The convex portion 25 is provided by being divided into two component pieces 11a. Further, a locking groove 26 is provided near the guide groove 24 in the mounting portion 14. The locking groove 26 is provided in each of the two component pieces 11a. The guide groove 24 is formed so as to be substantially orthogonal to the protruding direction of the device side terminal 23 from the terminal holder 20.

  Next, the structure of the battery pack 27 attached to the electric tool 10 of FIG. 1 will be described with reference to FIGS. The battery pack 27 can be attached to and detached from the mounting portion 14. Specifically, the battery pack 27 and the power tool 10 are relatively moved in the direction along the axis A, and the battery pack 27 is attached to or detached from the mounting portion 14. The battery pack 27 includes a plurality of battery cells 21, a holder 32, and a housing case 28. The battery cell 21 is a secondary battery that can be repeatedly charged and discharged. The battery cell 21 includes a lithium ion battery cell, a nickel metal hydride battery cell, a lithium ion polymer battery cell, a nickel cadmium battery cell, and the like. The battery cell 21 has a cylindrical shape, and two electrodes are provided at both ends of the battery cell 21 in the length direction. Of the two electrodes, one is an anode and the other is a cathode.

  The holder 32 holds the plurality of battery cells 21 in parallel with each other, and the holder 32 has a role as an insulator that covers the plurality of battery cells 21. In the present specification, the plurality of battery cells 21 may be referred to as a battery cell 21 group. The holder 32 has a cylindrical shape, and the battery cell 21 group is accommodated therein. The holder 32 may have either a structure having openings at both ends or a structure having openings at one end.

  The holder 32 of this embodiment arranges four battery cells 21 in parallel to form one row, and accommodates eight battery cells 21 in two rows. And the two battery cells 21 are made into 1 set, and the electrodes of 4 sets of battery cells 21 are connected by the connection member, respectively. The connection member for electrically connecting the electrodes is made of a conductive metal material. This metal material includes, in addition to copper, aluminum, and the like, a material obtained by performing nickel plating on the surface of a rolled steel sheet. Moreover, it is preferable that a connection member is plate shape. And the surface on the opposite side to the part which is contacting the electrode in each connection member is covered with the insulating member 32a. The material constituting the insulating member 32a includes an insulating tape or insulating sheet based on a resin film, a rubber-like elastic body, a metal plate having an insulating layer made of a resin material on the surface, and the like. It is also possible to cover the opening of the holder 32 or the gap between the insulating member 32a and the opening edge of the holder 32 with a waterproof sheet member, silicon, clay, or the like.

  Further, a circuit board 33 is attached to the body of the holder 32. The circuit board 33 is formed of a non-conductive resin material in a flat plate shape. The circuit board 33 has a linear first edge portion 33a and a linear second edge portion 33b continuous to both ends of the first edge portion 33a. When the circuit board 33 is viewed in plan, the two second edge portions 33b are arranged at right angles to the first edge portion 33a, and the two second edge portions 33b are parallel to each other. In addition, the circuit board 33 is provided with a third edge portion 33c that is continuous with the two second edge portions 33b. When the circuit board 33 is viewed in plan, the two third edges 33c are parallel to the first edge 33a. The circuit board 33 holds a plurality of battery side terminals 34. That is, a plurality of battery side terminals 34 are attached to the circuit board 33. The plurality of battery side terminals 34 are disposed in a region surrounded by the first edge 33a, the second edge 33b, and the third edge 33c. The plurality of battery side terminals 34 are arranged in a line along the first edge portion 33a. The circuit board 33 is provided with an electric circuit (not shown).

  The plurality of battery side terminals 34 are made of a conductive metal material. The plurality of battery side terminals 34 include a positive electrode terminal for charging, a positive electrode terminal for discharging, a negative electrode terminal for charging / discharging, and four signal terminals. The connecting member connecting the two positive electrodes of the two battery cells 21 is electrically connected to the positive electrode terminal for charging and the positive electrode terminal for discharging through the lead wire and the electric circuit, respectively. The connecting member connecting the two negative electrodes of the two battery cells 21 is electrically connected to the negative terminal for charging / discharging via the lead wire and the electric circuit.

  Further, a substrate cover 50 that covers the surface of the circuit board 33 is provided. The substrate cover 50 is integrally formed of an insulating material such as a resin material. The board cover 50 is an element that covers a region surrounded by the first edge 33 a, the second edge 33 b, and the third edge 33 c on the surface of the circuit board 33. The substrate cover 50 is configured in a substantially rectangular shape in plan view. That is, the substrate cover 50 has long sides 50b and 50c parallel to each other, and a plurality of slits 50a are provided along the long sides 50c. Further, two short sides 50d that connect both ends of the long sides 50b and 50c are provided. The plurality of battery side terminals 34 are respectively inserted into the slits 50a in a state where the substrate cover 50 is attached to the circuit board 33.

  The housing case 28 is an element that houses the holder 32 that holds the plurality of battery cells 21. The housing case 28 includes a case main body 29 and a cover 30 that closes the opening 29 a of the case main body 29. The holder 32, the case main body 29, and the cover 30 are each configured separately from a non-conductive material. The non-conductive material includes a resin material. The case main body 29 has a bottom plate 29b and a side wall 29c formed continuously on the outer periphery of the bottom plate 29b. The side wall 29c is provided with a vent hole 29d that allows the inside and the outside of the housing case 28 to communicate with each other.

  The cover 30 is provided with a flat plate portion 35 and a mount portion 36 having a height different from that of the plate portion 35. A plurality of terminal insertion holes 37 are provided in the mount portion 36. The plurality of terminal insertion holes 37 are formed in a slit shape. The plurality of terminal insertion holes 37 communicate the housing chamber of the housing case 28 with the outside. The plurality of battery side terminals 34 are separately inserted into a plurality of terminal insertion holes 37. In addition, two guide rails 38 are provided on both sides of the plurality of terminal insertion holes 37 in the mount portion 36. The two guide rails 38 are parallel to each other and extend in the length direction of the plurality of terminal insertion holes 37.

  Further, two connection surfaces 43 that connect the surface of the mount portion 36 and the surface of the plate portion 35 are formed. The two connection surfaces 43 are provided at the ends of the plate portions 35 in the two guide rails 38. The surface of the mount part 36 and the surface of the plate part 35 are at different heights, and extension lines (not shown) between the two surfaces are parallel to each other. Here, the height is a direction intersecting the length direction of the guide rail 38. In the cover 30 of the present embodiment, the length direction of the guide rail 38 and the height direction are substantially perpendicular. The two connection surfaces 43 are substantially perpendicular to the surface of the plate portion 35 and the surface of the mount portion 36. The two connection surfaces 43 are parallel to the height direction, and the plurality of terminal insertion holes 37 are opened from the surface of the mount portion 36 to the connection surface 43. Further, at the end portion of the cover 30 opposite to the plate portion 35, two protruding portions 44 higher than the mount portion 36 are provided. A recess 44 a is provided between the two protruding portions 44. Further, a vent hole 44b penetrating through the recess 44a is provided. The vent hole 44b connects the inside and the outside of the housing case 28.

  Further, ribs 39 are provided on the surface of the mount portion 36 in the cover 30. The rib 39 protrudes from the surface of the mount portion 36, and the rib 39 is provided between the two guide rails 38. When the surface of the mount portion 36 is viewed in plan, the rib 39 is provided in a U shape so as to surround the plurality of terminal insertion holes 37. The rib 39 includes a first protrusion 39a linearly extending in the arrangement direction of the plurality of terminal insertion holes 37, and two second protrusions extending linearly continuously at both ends of the first protrusion 39a. And a protrusion 39b. The first projecting portion 39 a extends in a direction perpendicular to the two guide rails 38. The two second protrusions 39b extend in parallel with the two guide rails 38 and are parallel to each other.

  Further, push operation buttons 40 are attached to both sides of the protruding portion 44 in the housing case 28. The push operation button 40 is attached to the housing case 28 so as to rotate within a range of a predetermined angle around the support shaft 40a. Further, the push operation button 40 is provided with a latch 41, and the latch 41 is inserted into a hole 42 provided in the cover 30. The tip of the latch 41 is exposed to the outside through the hole 42. The push operation button 40 is pushed toward the outside of the housing case 28 by an elastic member (not shown).

  Further, a window 30d is provided at a boundary portion between the mount portion 36 and the plate portion 35. The window 30d extends linearly in a direction substantially perpendicular to the two guide rails 38 when the cover 30 is viewed in plan. The window 30 d is connected to the plurality of terminal insertion holes 37. Further, the plurality of battery side terminals 34 are inserted into the plurality of terminal insertion holes 37 in a state where the cover 30 is attached to the case main body 29.

  Further, a seal member 51 shown in FIG. The seal member 51 is an element that seals between the cover 30 and the circuit board 33 as a holding member that holds the battery-side terminal 34. The sealing member 51 also serves as an element that seals between the substrate cover 50 and the cover 30. The seal member 51 is integrally formed of a material such as a rubber-like elastic body or silicon. As shown in FIG. 7, when the circuit board 33 is viewed in plan, the sealing member 51 is formed in an annular shape (endless shape) so as to surround the plurality of battery side terminals 34. When the circuit board 33 is viewed in plan, the seal member 51 has a substantially rectangular shape. That is, the seal member 51 seals the inside and outside of the housing case 28, foreign matter adheres to the battery side terminal 34 from the inside of the housing case 28, and from the periphery of the battery side terminal 34 to the inside of the housing case 28. This prevents foreign matter from entering.

  More specifically, the seal member 51 is attached along the long side 50 b and the short side 50 d of the substrate cover 50 and is attached along the first edge portion 33 a of the circuit board 33. Further, a part of the seal member 51 is also attached linearly between the two third edge portions 33 c of the surface of the circuit board 33. When a rubber-like elastic body is used as the seal member 51, the seal member 51 can be fixed to the circuit board 33 and the board cover 50 with an adhesive. When silicon is used as the sealing member 51, after applying fluid silicon over the circuit board 33 and the substrate cover 50, the silicon is fixed to the circuit board 33 and the substrate cover 50 in the process of solidifying the silicon. 51 is formed. Note that the sealing member 51 is omitted in FIG. 6 for convenience.

  On the other hand, when the cover 30 is attached to the case body 29, the seal member 51 comes into contact with the inner surface of the cover 30. The structure of the inner surface of the cover 30 with which the seal member 51 contacts will be described with reference to FIG. The structure of the inner surface of the cover 30 with which the seal member 51 contacts is provided in parallel with the edge portion 30e along the window 30d in the plate portion 35, the two ribs 52 provided on both sides of the plurality of terminal insertion holes 37, and the edge portion 30e. Ribs 53 formed thereon. The ribs 52 and 53 protrude from the inner surface of the cover 30, specifically, from the inner surface of the mount portion 36 toward the case main body 29. That is, the ribs 52 and 53 protrude downward toward the case body 29. In the present embodiment, “upper” and “lower” refer to the vertical direction in a state where the bottom plate 29b of the case main body 29 is located at the lowest position. The ribs 52 and 53 are the structure corresponded to the projection part of this invention. The two ribs 52 are substantially perpendicular to the edge 30 e and the rib 53 in a plan view of the cover 30 as viewed from the inner surface side. Further, the edge 30e and the ribs 52 and 53 are provided in an annular shape and a rectangle so as to surround the plurality of terminal insertion holes 37 in a plan view of the cover 30 as viewed from the inner surface side. With this configuration, the window 30 d is closed with the substrate cover 50, and the gap between the substrate cover 50 and the cover 30 is sealed with the seal member 51. These seal structures will be described in detail later.

  Next, an operation of attaching (mounting) the battery pack 27 to the mounting portion 14 of the electric tool 10 will be described. First, the power tool 10 and the battery pack 27 are arranged so that the two guide rails 38 and the two guide grooves 24 are substantially coaxial. At this time, the electric power tool 10 and the battery pack 27 are generally in a state as shown in FIG. Then, the power tool 10 and the battery pack 27 are brought close to each other, and the guide rail 38 is caused to enter the guide groove 24. That is, the mounting portion 14 and the battery pack 27 are relatively moved along the guide rail 38. Then, the device side terminal 23 provided in the mounting portion 14 enters the terminal insertion hole 37, the device side terminal 23 and the battery side terminal 34 are connected, the convex portion 25 enters the concave portion 44 a, and the latch 41. Is locked in the locking groove 26. When the latch 41 is locked in the locking groove 26, the attachment of the battery pack 27 to the electric tool 10 is completed. When the attachment of the battery pack 27 to the electric power tool 10 is completed, a seal target space 60 in which the device side terminal 23 and the battery side terminal 34 are disposed is formed between the cover 30 and the mounting portion 14. The seal target space 60 includes a contact portion between the device side terminal 23 and the battery side terminal 34. The seal target space 60 is shown in FIG.

  When the battery pack 27 is attached to the mounting portion 14, the seal member 22 contacts the cover 30 of the battery pack 27 to form a seal surface as shown in FIG. Specifically, the seal lip 22c contacts the first protrusion 39a of the rib 39, the second protrusion 39b of the rib 39, the connection surface 43, and the surface of the plate portion 35 to form a seal surface.

  Thus, the seal lip 22c of the seal member 22 contacts the cover 30 over the entire circumference to form an annular seal surface. The annular sealing surface surrounds the space 60 to be sealed. Therefore, even if foreign matter enters the gap between the cover 30 and the mounting portion 14 from the outside of the battery pack 27, the foreign matter can be prevented from reaching the sealing target space 60. The foreign matter contains water and can prevent the device side terminal 23 and the battery side terminal 34 from being corroded by water.

  Further, as shown in FIG. 9, the seal lip 22c is narrower as the cross-sectional shape in the width direction is closer to the tip. For this reason, it is possible to suppress an increase in sliding resistance even when a part of the seal lip 22c comes into contact with the second projecting portion 39b in the process of attaching the battery pack 27 to the mounting portion 14. Therefore, the electric power tool 10 can reduce the operating force required to attach the battery pack 27 to the mounting portion 14.

  Furthermore, the seal member 22 is interposed between the mounting portion 14 and the terminal holder 20 as shown in FIGS. That is, the seal member 22 has a function of sealing between the mounting portion 14 and the terminal holder 20. Therefore, the electric power tool 10 can prevent foreign matter existing in the internal space B of the grip 13 from reaching the connection portion between the device-side terminal 23 and the battery-side terminal 34. The foreign matter contains water and can prevent water from reaching the connection portion between the device-side terminal 23 and the battery-side terminal 34. In addition, when the operation button 40 is pressed while the battery pack 27 is attached to the electric power tool 10, the latch 41 is released from the locking groove 26. Next, when the battery pack 27 is moved in the direction along the axis A in the opposite direction, the battery pack 27 can be removed from the mounting portion 14.

  On the other hand, when the battery pack 27 is attached to the mounting portion 14 of the tool main body 11 or removed from the tool main body 11, foreign matter outside the housing case 28 is caused by a gap between the case main body 29 and the cover 30. There is a possibility of entering the inside of the housing case 28 from at least one of the air holes 29d and 44b, the gap between the cover 30 and the latch 41, the gap between the cover 30 and the operation button 40, and the like. Foreign substances include water, dust, mud and the like. Since the electric tool 10 is a cordless type, the electric tool 10 can be used regardless of the location. That is, the electric power tool 10 is often used in a poor environment such as a dusty environment or rainy weather, such as a building demolition work site.

  In the substrate cover 50, when foreign matter outside the housing case 28 passes through the terminal insertion hole 37 and the window 30 d and enters the space where the plurality of battery side terminals 34 are provided, the foreign matter contacts the circuit board 33. To prevent that. Further, if the battery pack 27 has a waterproof structure in which the opening of the holder 32 or the gap between the insulating member 19 and the opening edge of the holder 32 is covered with a waterproof sheet member, silicon, clay, or the like, the battery pack 27 is accommodated. Even if water enters the inside of the case 28, it is possible to prevent a short circuit between the battery cells 21 and corrosion of the electrodes.

  The battery pack 27 of the present embodiment is provided with a seal member 51 that seals between the circuit board 33 and the board cover 50 and the cover 30. When the cover 30 is fixed to the case body 29, the seal member 51 comes into contact with the inner surface of the cover 30 as shown in FIG. 10. More specifically, the seal member 51 is disposed below the plate portion 35 and below the mount portion 36. The mount portion 36 is provided with ribs 52 and 53 that protrude downward toward the seal member 51. Therefore, the seal member 51 contacts the ribs 52 and 53 and contacts the inner surface of the plate portion 35 along the edge portion 30e. That is, the sealing member 51 forms a substantially rectangular sealing surface in a plan view of the circuit board 33.

  For this reason, even if the cover 30 of the battery pack 27 that is not attached to the tool main body 11 is faced down in a state where there is a foreign substance inside the storage case 28, the foreign substance inside the storage case 28 is not removed from the circuit board 33 and the board. It is possible to prevent the seal target space 60 from being reached via the gap between the cover 50 and the cover 30. Therefore, a short circuit between the battery side terminals 34 can be prevented. If the foreign matter is water, it is possible to prevent the battery side terminal 34 from corroding due to water coming into contact with the battery side terminal 34. In addition, when the electric tool 10 with the battery pack 27 attached to the tool body 11 is in a state in which the cover 30 faces downward, foreign matter inside the housing case 28 is caused by the circuit board 33, the board cover 50, and the cover 30. It is possible to prevent entry into the seal target space 60 via the gap. The foreign matter includes water. Therefore, it is possible to prevent short circuit between the device side terminals 23, short circuit between the battery side terminals 34, short circuit between the device side terminals 23 and the battery side terminals 34, corrosion of the device side terminals 23, and corrosion of the battery side terminals 34.

  Further, the seal member 51 is disposed below the plate portion 35 and the mount portion 36. For this reason, when the battery pack 27 is mounted on the mounting portion 14 of the tool body 11, the seal member 51 can be prevented from coming into contact with the mounting portion 14. Therefore, it is possible to suppress the seal member 51 from coming into contact with the mounting portion 14 and peeling off. Further, the seal member 51 is not directly attached to the battery side terminal 34. For this reason, when attaching the battery pack 27 to the tool main body 11, it can also prevent that the contact resistance of the battery side terminal 34 and the apparatus side terminal 23 increases. Further, the seal member 51 contacts the inner surfaces of the ribs 52 and 53 projecting downward from the mount portion 36 and the plate portion 35 to form a seal surface. Therefore, the circuit board 33, the substrate cover 50, and the cover 30 are sealed, and foreign matter outside the housing case 28 can be prevented from entering the housing case 28, and the water inside the housing case 28 is sealed. It can prevent reaching the target space 60.

  Further, the ribs 52 and 53 protrude to the same position as the inner surface of the plate portion 35 or a position below it. For this reason, the protrusion amount (length) of the seal member 51 in the vertical direction of the housing case 28 can be suppressed. The protrusion amount of the seal member 51 is represented by the length in the vertical direction in FIG. Therefore, it is possible to suppress the buckling deformation of the seal member 51 in a state where the seal member 51 is in contact with the inner surface of the cover 30, that is, the ribs 52 and 53, and it is possible to maintain high sealing performance. Further, the housing case 28 is configured to be divided in the vertical direction as shown in FIG. For this reason, when attaching the cover 30 to the case main body 29, it can suppress that the sealing member 51 and the apparatus side terminal 23 are rubbed, and the sealing member 51 peels off. Further, the length of the housing case 28 in the vertical direction can be longer than the distance from the upper surface of the circuit board 33 to the tips of the ribs 52 and 53. Here, it is assumed that the cover 30 is attached to the case main body 29. If comprised in this way, when the cover 30 is attached to the case main body 29, the sealing member 51 will contact the ribs 52 and 53, and it will elastically deform, Therefore The contact surface pressure of a sealing surface can be raised. Therefore, the sealing performance of the sealing member 51 can be ensured. In the battery pack 27 shown in FIG. 6, the substrate cover 50 may not be provided. Even in a battery pack in which the substrate cover 50 is not provided, the seal member 51 can be provided between the circuit board 33 and the cover 30.

  As described above, the seal member 22 attached to the tool body 11 plays a role of preventing water existing in the internal space B of the tool body 11 from entering the seal target space 60. Further, the seal member 22 plays a role of preventing water that has entered between the mounting portion 14 and the cover 30 from entering the seal target space 60. Further, the sealing member 51 plays a role of preventing water in the housing case 28 from entering the sealing target space 60 via the space between the cover 30 and the circuit board 33. That is, the sealing member 22 has a role of preventing water existing in the internal space B from entering the sealing target space 60, and water that has entered between the mounting portion 14 and the cover 30 enters the sealing target space 60. It also serves to prevent intrusion. Therefore, it can suppress that the number of parts of the electric tool 10 increases.

(Second Embodiment)
Next, the electric tool 10 of 2nd Embodiment of this invention is demonstrated based on FIG. 1, FIG. The basic configuration of the power tool 10 of the second embodiment is the same as the configuration of the power tool 10 of the first embodiment. A battery pack 27 shown in FIGS. 11 to 13 is attached to the mounting portion 14 of the electric power tool 10 of the second embodiment. First, another attachment structure of the seal member for sealing the space 60 to be sealed will be described with reference to FIGS. 11 and 12. The cover 30 of the battery pack 27 has a mounting hole 45 formed across the plate portion 35 and the mount portion 36. An annular seal member 46 is fitted in the mounting hole 45. Further, a terminal block 47 which is a separate member from the cover 30 is provided. The terminal block 47 is inserted into the mounting hole 45 and is fixed to the cover 30. A plurality of terminal insertion holes 37 are formed in the terminal block 47. The seal member 46 is attached along the outer peripheral surface of the terminal block 47. Thus, the annular seal member 46 is attached around the terminal insertion hole 37.

  The seal member 46 is continuous with the first straight portion 46 a that extends linearly perpendicular to the guide rail 38, and both ends of the first straight portion 46 a, and is linearly parallel to the guide rail 38. And an extended second straight portion 46b. Further, the seal member 46 has two connection portions 46 c that are respectively formed continuously with the two second straight portions 46 b and extended along the connection surface 43. Further, the seal member 46 includes a third straight portion 46d in which both ends of the two connection portions 46c are connected. The third straight part 46d is parallel to the first straight part 46a.

  In the sealing member 46 configured as described above, the first straight portion 46 a is fixed to a portion of the inner peripheral surface of the mounting hole 45 that is perpendicular to the guide rail 38. The second straight portion 46 b is fixed to a portion parallel to the guide rail 38 on the inner peripheral surface of the mounting hole 45. The two connection portions 46 c are in contact with the two connection surfaces 43 separately. The third straight portion 46 d is fixed to a portion along the plate portion 35 on the inner peripheral surface of the mounting hole 45. Thus, in a state where the seal member 46 is fitted in the mounting hole 45 and fixed to the cover 30, the seal member 46 contacts the cover 30 to form an annular seal surface.

  The terminal block 47 is integrally formed of a non-conductive material, for example, a resin material, and the terminal block 47 and the seal member 46 are integrated with an adhesive. The terminal block 47 and the sealing member 46 can be integrated by two-layer molding. The seal member 46 is integrally formed of a rubber-like elastic body, and a part of the seal member 46 protrudes from the surface of the mount portion 36. Note that the above-described seal member 22 is not provided in the mounting portion 14 to which the battery pack 27 shown in FIG. 11 is attached. The battery pack 27 shown in FIG. 11 can be attached to and detached from the electric tool 10 shown in FIGS. 1 and 2.

  When the battery pack 27 shown in FIG. 11 is attached to the mounting portion 14 of the electric tool 10 as shown in FIG. 2, the device side terminal 23 provided in the mounting portion 14 and the battery side terminal 34 of the battery pack 27 are connected. The Further, the seal lip of the seal member 46 contacts the mounting portion 14 to form an annular seal surface. The seal lip of the seal member 46 is a portion protruding upward from the plate portion 35 and the mount portion 36. The seal member 46 is attached to the cover 30 of the battery pack 27 so as to surround a connection portion between the device side terminal 23 and the battery side terminal 34. Therefore, the battery pack 27 shown in FIGS. 11 and 12 can obtain the same effects as those of the power tool 10 and the battery pack 27 described with reference to FIGS.

  Next, in the electric power tool 10 of the second embodiment, the structure of the seal member that seals between the mounting portion 14 and the terminal holder 20 will be described with reference to FIGS. 1, 2, 13, and 14. The structure of the seal member 54 provided in the electric tool 10 of the second embodiment is different from the shape and attachment structure of the seal member 22 provided in the electric tool 10 of the first embodiment. First, in the electric power tool 10 of the second embodiment, the sealing member 22 is not provided between the mounting portion 14 and the terminal holder 20. In the electric power tool 10 of the second embodiment, the terminal holder 20 is directly attached to the inner periphery of the attachment hole of the mounting portion 14. Moreover, the mounting part 14 is comprised by the two component pieces 11a divided | segmented along the division surface 11d similarly to the mounting part 14 of FIG.

  For this reason, the terminal holder 20 is sandwiched between the two component pieces 11 a and supported by the mounting portion 14. That is, the mounting portion 14 is provided with a mounting hole, and the convex portion 14a is provided on the inner peripheral surface of the mounting hole. On the other hand, a recess 20 a is provided on the outer peripheral surface of the terminal holder 20. Then, the convex portion 14 a is fitted (engaged) into the concave portion 20 a, and the terminal holder 20 is attached to the mounting portion 14. When the convex portion 14 a and the concave portion 20 a are fitted together, the convex portion 14 a and the concave portion 20 a are not exposed to either the internal space B or the opening portion 17. That is, the seal member 54 is provided at a location other than the location where the recess 20a and the projection 14a are provided. The structure for attaching the terminal holder 20 to the mounting portion 14 includes a convex portion provided on the outer peripheral surface of the terminal holder 20 and a concave portion provided on the inner peripheral surface of the mounting hole of the mounting portion 14.

  A slight gap is provided between the convex portion 14a of the mounting portion 14 and the concave portion 20a of the terminal holder 20 to the extent that the terminal holder 20 does not fall off from the mounting portion 14. This gap is provided so that the terminal holder 20 and the mounting portion 14 can be relatively moved within a predetermined range. As described above, the device-side terminal 23 is fixed to the mounting portion 14, and the battery-side terminal 34 is fixed in the battery pack 27. In addition, the device side terminal 23 and the battery side terminal 34 are electrically and mechanically connected. Here, when the work is performed with the battery pack 27 attached to the electric tool 10, there may be a relative movement (displacement) between the mounting portion 14 and the battery pack 27 due to vibration of the electric motor M or the like. . When relative movement occurs between the mounting portion 14 and the battery pack 27, chattering occurs between the device-side terminal 23 and the battery-side terminal 34, resulting in poor contact between the device-side terminal 23 and the battery-side terminal 34. May occur.

  On the other hand, in the electric power tool 10 of the present embodiment, a gap is formed between the convex portion 14 a of the mounting portion 14 and the concave portion 20 a of the terminal holder 20. For this reason, the vibration of the mounting portion 14 is absorbed by the gap, and the vibration of the mounting portion 14 can be suppressed from being transmitted to the terminal holder 20. Therefore, chattering can be prevented from occurring between the device side terminal 23 and the battery side terminal 34. The gap amount formed between the convex portion 14a of the mounting portion 14 and the concave portion 20a of the terminal holder 20 is determined by experiments, simulations, and the like based on the amplitude when the mounting portion 14 vibrates. The “predetermined range” is a range that exceeds the amplitude when the mounting portion 14 vibrates. Note that the structure for suppressing chattering between the device-side terminal 23 and the battery-side terminal 34 includes a structure in which the battery-side terminal 34 is movably attached to the battery pack 27.

Further, as shown in FIG. 14, the seal member 54 is provided in an endless shape (annular shape) so as to cover a contact portion between the mounting portion 14 and the terminal holder 20. The seal member 54 is integrally formed of the same material as that of the seal member 22. The seal member 54 is disposed in the internal space B. The seal member 54 plays a role of preventing water existing in the internal space B from passing between the terminal holder 20 and the mounting portion 14 and entering the seal target space 60. Therefore, the power tool 10 of the second embodiment can obtain the same effects as the power tool 10 of the first embodiment.

  Specifically, as shown in FIG. 13, the seal member 54 is in contact with both the mounting portion 14 and the terminal holder 20. The seal member 54 is fixed to the inner surface of the mounting portion 14 so as to cover a contact portion between the mounting portion 14 and the terminal holder 20 and a gap between the mounting portion 14 and the terminal holder 20. The fixing method of the seal member 54 includes a method of fixing the seal member 54 above the terminal holder 20 with an adhesive, and a method of supporting the seal member 54 by a rib formed on the inner space B side in the mounting portion 14. The seal member 54 is pressed and fixed so as to contact the mounting portion 14 and the terminal holder 20.

  That is, the seal member 54 is in contact with the mounting portion 14 and the terminal holder 20 at a location other than a location where the convex portion 14a of the mounting portion 14 and the concave portion 20a of the terminal holder 20 are fitted (engaged). The terminal holder 20 can be moved relative to the mounting portion 14 by the amount of the gap described above with the upper surface thereof in contact with the seal member 54. For this reason, even if the terminal holder 20 moves within the gap amount due to vibration or the like, foreign matter such as water in the internal space B can be prevented from entering the seal target space 60 through the gap.

  The seal member 54 may be fixed to the terminal holder 20 without being fixed to the mounting portion 14. Also in this case, the seal member 54 is fixed to the terminal holder 20 so as to straddle the gap between the terminal holder 20 and the mounting portion 14 and so that the seal member 54 is always in contact with the terminal holder 20 and the mounting portion 14. That is, the seal member 54 is disposed in the internal space B on the upper surface of the terminal holder 20.

  Further, the seal member 54 may be provided not in the internal space B but below the terminal holder 20. That is, the seal member 54 may be attached to the terminal holder 20 or the mounting part 14 between the mounting part 14 and the cover 30. Even if the sealing member 54 is provided at this location, foreign matter can be prevented from entering the sealing target space 60 from the internal space B. However, in this configuration, when the battery pack 27 is attached to or removed from the mounting portion 14, the seal member 54 may come into contact (scratch) with the cover 30. For this reason, the seal member 54 is easily peeled off, leading to an increase in the sliding resistance of the battery pack 27 with respect to the mounting portion 14, and the mountability of the battery pack 27 with respect to the mounting portion 14 may be reduced. Therefore, the seal member 54 is preferably provided in the internal space B.

  That is, the sealing member 22 of the first embodiment is sandwiched and supported between the mounting portion 14 and the terminal holder 20. In this configuration, when the mounting portion 14 and the battery pack 27 move relative to each other due to vibration or the like, the vibration is absorbed by the expansion and contraction of the seal member 22. Therefore, foreign matter can be prevented from entering the sealing target space 60 from the internal space B, and chattering can be prevented from occurring between the device-side terminal 23 and the battery-side terminal 34.

  On the other hand, in the second embodiment, the seal member 54 is fixed to the mounting portion 14 or the terminal holder 20 and is always in contact with both the mounting portion 14 and the terminal holder 20. Therefore, even if the mounting portion 14 and the terminal holder 20 move relative to each other, the sealing performance of the seal member 54 does not deteriorate, and the same effect as that of the first embodiment can be obtained.

  Furthermore, also in the electric tool 10 of the second embodiment, as shown in FIG. 7, a seal member 51 is provided inside the battery pack 27. The shape and attachment structure of the seal member 51 are the same as the shape and attachment structure of the connection surface 43 provided in the electric power tool 10 of the first embodiment. The effect of the seal member 51 provided in the electric tool 10 of the second embodiment is the same as that of the seal member 51 provided in the electric tool 10 of the first embodiment. Further, if the battery pack 27 (FIG. 11) of the second embodiment is attached to the electric power tool 10, the gap between the seal member 22, the seal member 46, the housing case 28, and the mounting portion 14 can be sealed. Can be obtained. On the other hand, since the seal member 22 comes into contact with the housing case 28 and the seal member 46 comes into contact with the mounting portion 14, the resistance when the battery pack 27 is attached to the electric tool 10 increases.

  When the correspondence relationship between the configuration described in the first embodiment and the second embodiment and the configuration of the present invention is described, the electric power tool 10 corresponds to the electric device of the present invention, and the tool body 11 and the battery pack 27 are provided. In combination, the electrical apparatus of the present invention is configured. Moreover, in the electric tool 10 of 1st Embodiment, the sealing members 22 and 54 are equivalent to the 1st sealing member of this invention, and the sealing member 51 is the 1st battery side sealing member and 2nd seal in this invention. The seal member 46 corresponds to a member, and corresponds to the third seal member and the second battery-side seal member of the present invention. Further, the seal member 22 corresponds to the device side seal member of the present invention. Furthermore, in the electric tool 10 of the first and second embodiments, the tool body 11 corresponds to the apparatus body of the present invention, the circuit board 33 corresponds to the holding member of the present invention, and the convex portion 14a and the concave portion. 20a corresponds to the engaging portion of the present invention. Furthermore, the portion of the mounting portion 14 that forms the internal space B corresponds to “the opposite side to the direction in which the device-side terminal protrudes from the device-side holding member” of the present invention. Further, the guide groove 24 corresponds to the guide portion of the present invention.

  The present invention is not limited to the first embodiment and the second embodiment, and various modifications can be made without departing from the scope of the invention. For example, the electric device of the present invention includes a grinder (grinding tool), a sander (polishing tool), a nailing machine, a screw driving machine, a tacker, a dust collector (cleaner), a blower (fan, blower), Includes pumps, high pressure washers, chain saws (cutting tools), gardening tools (mowers, plant clippers), tillers, etc. That is, the electrical device of the present invention rotates the electric motor with the power of the battery pack, and converts the rotational motion into at least one of reciprocating motion or rotational motion of the operating member, or hitting while rotating. Including equipment. Moreover, the electric apparatus of the present invention includes a torch light (flashlight) and the like. That is, the electrical device of the present invention includes a lighting device that converts electrical energy supplied from the battery pack into light energy.

  The “endless shape” in the present invention is a structure in which the seal member is an annular integrally formed product as a whole, and there is a cut in at least one place in the length direction of the seal member, but the seal member is fixed to the object. Includes an endless structure with no cuts. Furthermore, the battery pack of the present invention includes a structure that can accommodate less than 4, or 9 or more battery cells.

  Furthermore, the electric tool of the present invention includes a structure in which an electric motor is provided in the casing and a structure in which the electric motor is provided in the grip. In the present invention, the rubber-like elastic body constituting the seal member has rigidity, shape, and dimensions so that the elastic deformation rate is 20% or more. The seal member includes a solid member and a porous sponge. Further, in the power tool of the first embodiment or the power tool of the second embodiment, the guide mechanism that determines the direction in which the battery pack 27 is attached to and detached from the mounting portion 14 is a guide groove 24 provided in the mounting portion 14. In addition to the guide rail 38 provided on the cover 30, a structure in which a guide rail (not shown) is provided on the mounting portion 14 and a guide groove (not shown) is provided on the cover 30 is also included. Furthermore, the seal member 51 that seals between the cover 30 and the circuit board 33 may be fixed to the inner surface of the cover 30.

DESCRIPTION OF SYMBOLS 11 ... Tool body, 14 ... Mounting part, 14a ... Convex part, 20 ... Terminal holder, 20a ... Concave part, 21 ... Battery cell, 23 ... Equipment side terminal, 27 ... Battery pack, 34 ... Battery side terminal, 54 ... Seal member .

Claims (21)

A mounting part to which a battery pack having a battery side terminal connected to the battery cell can be attached and detached, and a device side holding member that is provided in the mounting part and holds the device side terminal connected to the battery side terminal. An electrical device having a device body having
The device side holding member and the mounting portion have engaging portions that engage with each other,
An electrical device comprising a seal member that contacts the device-side holding member and the mounting portion at a location other than the location where the engagement portion is provided.   The electrical device according to claim 1, wherein the seal member is disposed on a side opposite to a direction in which the device-side terminal protrudes from the device-side holding member.   The electrical device according to claim 1, wherein the seal member is attached to the device-side holding member or the mounting portion.   The electrical device according to claim 2, wherein the seal member is attached to the device-side holding member and is in contact with the mounting portion.   The electrical device according to claim 2, wherein the seal member is attached to the mounting portion and is in contact with the device-side holding member.   The electric device according to any one of claims 1 to 4, wherein the device-side holding member is configured to be movable with respect to the mounting portion. The mounting portion has a guide portion that determines the attachment and removal directions of the battery pack,
The said guide part is comprised so that it may be substantially orthogonal to the protrusion direction of the said apparatus side terminal from the said apparatus side holding member, The claim of any one of Claims 1-6 characterized by the above-mentioned. Electrical equipment. A battery pack having a battery-side terminal connected to a battery cell is attachable and detachable, and is an electric device including a device body having a device-side terminal connected to the battery-side terminal,
In the state where the battery pack is attached to the device main body, a seal member is provided to prevent foreign matter from entering the connecting portion between the battery side terminal and the device side terminal from at least the battery pack side and the device main body side. Electrical equipment characterized by that. The battery pack has a storage case for storing the battery cells,
The device body has a mounting portion to which the storage case can be attached and detached,
The sealing member is
A battery-side seal member disposed between the holding case that contacts the inside of the storage case and holds the battery-side terminal, and the storage case;
The electric device according to claim 8, further comprising a device-side seal member disposed around a terminal holder attached to the mounting portion and provided with the device-side terminal.   The electric device according to claim 9, wherein the device-side seal member is interposed between the terminal holder and the mounting portion.   11. The electric device according to claim 9, wherein the battery-side seal member extends upward from the holding member and contacts the inside of the housing case.   The electric device according to any one of claims 9 to 11, wherein the device-side sealing member is in contact with the housing case in a state where the battery pack is attached to the device body. machine.   The battery pack includes a second battery-side seal member that is provided around a terminal insertion hole into which the battery-side terminal is inserted, and that contacts the mounting portion when the battery pack is attached to the device body. The electrical apparatus according to any one of claims 9 to 11, wherein: The battery pack has a terminal block provided with the terminal insertion hole,
The electric device according to claim 13, wherein the second battery-side sealing member is disposed between the terminal block and the housing case. An electric device having a battery pack and a device main body to which the battery pack is attached and detached,
The battery pack includes a housing case that houses battery cells, a battery-side terminal connected to the battery cell, a holding member that is provided inside the housing case and holds the battery-side terminal, and the housing A terminal insertion hole provided in the case and into which the battery-side terminal is inserted;
A terminal holder provided in the device main body, a device side terminal provided in the terminal holder, and connected to the battery side terminal when the battery pack is attached to the device main body;
When the battery pack is attached to the device main body, a space to be sealed is formed between the battery pack and the device main body, and the battery side terminal and the device side terminal are disposed;
A first seal member for sealing between the device main body and the terminal holder;
An electrical apparatus comprising a second seal member provided between the housing case and the holding member.   The electric device according to claim 15, wherein the first seal member is provided between the device main body and the battery pack so as to surround the space to be sealed.   16. The electric device according to claim 15, further comprising a third seal member provided between the device main body and the battery pack so as to surround the space to be sealed.   The electric device according to claim 15, wherein the first seal member is provided inside the device main body.   The first seal member is fixed to the device main body, and the first seal member contacts the housing case to form an endless seal surface when the battery pack is attached to the device main body. The electric device according to claim 17 or 18, wherein   The third seal member is fixed to the housing case, and the third seal member contacts the device main body to form an endless seal surface when the battery pack is attached to the device main body. The electric device according to claim 17 or 18, wherein   The second seal member is configured to prevent foreign matter outside the storage case from entering the seal target space through the storage case and the holding member. The electric device according to any one of claims 15 to 20.

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