JP2013140747A - Battery pack, electric tool and charger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack mounting structure which can minimize the influence of increasing friction resistance due to roughness of the slide surface and is almost free from defects even when left and right operation loads are deviated.SOLUTION: Two operation members 40 installed on both sides of a battery pack 10 are provided in order to operate an engaging member 30. The engaging member 40 includes: an operation part 42 enabling push-in operation; a spindle part 43 installed in the operation part 42; and a depression part 41 extended to a position of abutting on a receiving part 32 of the engaging member 30. When push-in operation is performed inward, the operation part 40 is rotated around the spindle part 43 as an axis and moves the engaging member 30 in the projecting direction by depressing the receiving part 32 by the depression part 41.

Description

  The present invention relates to a battery pack that is detachably provided in a target device such as an electric tool or a charger as a power source for an electric tool, and an electric tool and a charger that can be attached to and detached from the battery pack.

  Conventionally, a battery pack used as a power source for an electric tool or the like can be attached to and detached from a grip portion or a charger of the electric tool, and the positive and negative terminals of the battery pack are attached to the electric tool, the charger, etc. It is comprised so that it may contact with the terminal provided in the object apparatus.

  In addition, as shown in Patent Document 1, such a battery pack mounting structure is provided with a locking hook on the battery pack, and the locking hook is locked to the mounting portion of the electric tool, so A battery pack that prevents the battery pack from being detached from the mounting portion is known.

  And when removing a battery pack, it forms so that engagement of a latching hook may be cancelled | released by predetermined | prescribed operation. For example, in the structure described in Patent Document 1, a lock release button is provided on both sides of the battery pack, and the lock hook moves in the lock release direction when the lock release button is pushed into the battery pack. Like to do. Specifically, the inclined inner surface of the lock release button abuts the receiving portion of the lock hook so that when the tilt lock release button is pushed in, the lock hook is placed on the inner surface of the lock release button. The receiving portion is slid to move the locking hook in the unlocking direction.

  According to such a battery pack mounting structure, when the lock release button is pushed inward, the operation load is converted into a force in a direction of pushing down the lock hook. That is, since the lock can be released by a natural operation of gripping the battery pack, the operability for removing the battery pack can be improved.

JP 2008-103144 A

  However, it is inevitable that dust enters the battery pack at the work site. If dust enters the inside of the battery pack in the structure described in Patent Document 1, the dust may enter the sliding surface. When the unlocking operation is performed in a state in which dust has entered the sliding surface, the sliding surface is roughened by sliding while sandwiching the dust, which causes a problem of increased frictional resistance. When the frictional resistance is increased, the load increases and the operability is deteriorated. In the worst case, there is a possibility that the operation itself cannot be performed.

  Further, if the force for pressing the left and right lock release buttons is biased, there is a possibility that the lock hook is inclined and caught by applying a biased force to the lock hook. If the locking hook is caught, in the worst case, the locking hook cannot be moved, and the battery pack may not be removed.

  Accordingly, the present invention provides a battery pack mounting structure that can minimize the influence of rough sliding surfaces and increased frictional resistance, and that is less prone to malfunction even when the left and right operating loads are biased. Let it be an issue.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

(Claim 1)
The invention described in claim 1 is characterized by the following points.

  That is, the battery pack according to claim 1 is a battery pack that can be attached to and detached from a mounting portion of a target device such as a power tool, and an engagement member that includes a stopper portion that protrudes and protrudes from an upper surface of the battery pack; Two operating members provided on both sides of the battery pack for operating the engaging member, and a biasing member that biases the engaging member in a direction in which the stopper portion engages with the mounting portion. The engaging member includes a receiving portion at a lower portion of the stopper portion, and the operating member is provided with an operating portion that can be pushed in, a support shaft portion provided in the operating portion, and the receiving portion. A pressing portion extending to a contact position, and when the operation portion is pushed inward, the operation portion rotates about the support shaft portion, and the pressing portion pushes down the receiving portion to thereby The engaging member is moved in the immersion direction. .

(Claim 2)
The invention described in claim 2 has the following features in addition to the features of the invention described in claim 1 described above.

  That is, with respect to the contact point between the pressing portion and the receiving portion when the operation member is rotated, the distance that the contact point moves in the protruding and retracting direction of the engaging member is the direction in which the contact point is orthogonal to the protruding and protruding direction. It is characterized by being larger than the distance moved.

(Claim 3)
The invention described in claim 3 is characterized by the following points in addition to the characteristics of the invention described in claim 1 or 2.

  That is, the operation member is characterized in that the operation portion, the support shaft portion, and the pressing portion are arranged in a substantially L shape.

(Claim 4)
The invention according to claim 4 is an electric tool characterized in that the battery pack according to any one of claims 1 to 3 can be attached and detached.

(Claim 5)
A fifth aspect of the present invention is a charger characterized in that the battery pack according to any one of the first to third aspects can be attached and detached.

  The present invention is as described above, and includes two operation members provided on both sides of the battery pack in order to operate the engaging member, and the operation member is provided in the operation unit that can be pushed in and the operation unit. A support shaft portion and a push-down portion extending to a position where it abuts on the receiving portion of the engaging member, and rotates around the support shaft portion when the operation portion is pushed inward. Then, when the pressing portion pushes down the receiving portion, the engaging member is moved in the immersion direction.

  In this way, since the engaging member is moved by the pressing portion that extends to the lower side of the stopper portion, the pressing portion only has to push the engaging member downward, and the distance that the pressing portion slides on the receiving portion. Can be minimized, so that it is possible to minimize the influence of the rough sliding surface and the increased frictional resistance.

  In addition, since the pressing portion pushes down the engaging member below the stopper portion, even if the operation load is biased between the two operating members (or even if only one operating member is operated), the engaging portion is engaged. The member can be pushed down in the intended direction. In other words, the engaging member does not tilt, and the engaging member can be pushed down smoothly.

It is an external appearance perspective view of the electric tool which attached the battery pack. It is a figure which shows the attachment part of an electric tool. It is an external appearance perspective view of a battery pack. It is an exploded view of a battery pack. It is an external appearance perspective view of an engaging member. It is an external appearance perspective view of an operation member. It is sectional drawing which shows the battery pack of the state from which the engaging member protruded. It is sectional drawing which shows the battery pack of the state in which the engaging member was immersed. It is explanatory drawing which shows the movement distance of the contact of a pressing part and a receiving part. It is an external appearance perspective view of the charger which attached the battery pack.

  An embodiment of the present invention will be described by taking an electric driving tool as the electric tool 100 as an example with reference to the drawings.

  As shown in FIG. 1, the electric power tool 100 and the battery pack 10 according to the present embodiment are detachable from each other. That is, an attachment portion 101 for attaching the battery pack 10 is formed at the lower end portion of the grip of the electric power tool 100, and the battery pack 10 is placed so that the lower end surface of the grip and the upper end surface of the battery pack 10 are in contact with each other. It can be attached.

  As shown in FIG. 2, the mounting portion 101 of the electric power tool 100 includes a bottom plate 102 provided at the lower end of the grip, and side hanging portions 103 provided on both sides of the bottom plate 102.

  The bottom plate 102 is for sliding the upper surface of the battery pack 10 along the lower surface, and an engaged portion 106 for latching the battery pack 10 is recessed in the bottom surface near the tip portion 102a. ing. The engaged portion 106 is a recess having a substantially V-shaped cross section, and the surface on the tip end portion 102a side is formed substantially vertically and the surface on the side opposite to the tip end portion 102a is inclined.

  The side drooping portion 103 is provided so as to protrude downward from both left and right edges of the bottom plate 102 and is formed so as to come into contact with the upper side portion of the battery pack 10 from the outside when the battery pack 10 is attached. Yes. A lower end edge of the side hanging part 103 protrudes inward to form a guide protrusion 104, and thereby, a slide groove 105 is formed in the upper part of the guide protrusion 104. The guide ridges 104 and the slide grooves 105 are slidably engaged with guide rail portions 21 and grooves 22 (described later) provided on the upper side of the battery pack 10.

  On the other hand, as shown in FIG. 3, in the battery pack 10 according to the present embodiment, the guide rail portion 21 and the groove 22 that engage with the guide protrusion 104 and the slide groove 105 described above are formed on the upper portion. The guide rail portion 21 and the groove 22 are formed on both side surfaces of the battery pack 10, and the guide rail portion 21 and the groove 22 provide the battery pack 10 with respect to the mounting portion 101 of the electric tool 100. It can be removed by sliding it. That is, the guide rail portion 21 protrudes outward to form a groove 22 in the lower portion of the guide rail portion 21. By inserting the guide protrusion 104 from the opening end side of the groove 22, the guide protrusion 104 and The battery pack 10 can be slid with the slide groove 105 engaged with the guide rail portion 21 and the groove 22.

  Further, on the upper surface of the battery pack 10, the stopper portion 31 that engages with the engaged portion 106 described above is urged in the protruding direction. The stopper portion 31 is provided so as to protrude in and out in a direction orthogonal to the extending direction of the guide rail portion 21 and the groove 22. Accordingly, when the battery pack 10 is slid to a predetermined position in the direction in which the stopper portion 31 and the engaged portion 106 are engaged, the stopper portion 31 is fitted into the engaged portion 106 and the battery pack 10 is attached to the mounting portion. 101 is firmly fixed.

  When removing the battery pack 10 fixed to the attachment portion 101, it is necessary to push the operation portion 42 inward of the battery pack 10. As will be described later in detail, two operation units 42 are provided so as to face both sides of the battery pack 10 as shown in FIG.

  FIG. 4 is an exploded view of the battery pack 10 described above. As shown in FIG. 4, the battery pack 10 includes a battery cell 12 formed by connecting a plurality of batteries 13 in series, in parallel, or both, a case main body 11 that accommodates the battery cell 12, and an upper portion of the case main body 11. Cover member 20, covering member 30 having the stopper 31 described above, spring 37 as a biasing member for biasing the operating member 40, on both sides of the battery pack 10 for operating the engaging member 30 Two operating members 40 provided are provided.

  The lid member 20 is a member that covers the upper part of the battery pack 10 and forms a case that accommodates other members by being fixed to the case body 11 with screws, bolts, or the like. As shown in FIG. 4, the guide rail portion 21 and the groove 22 described above are formed on both sides of the lid member 20. Further, on the extension line of the guide rail portion 21 and the end portion of the groove 22, an operation opening 23 for exposing the operation portion 42 described above to the outside is formed by being cut out. In addition, a latch port 24 for projecting the stopper portion 31 described above is opened on the upper surface.

  The engaging member 30 is a member that is slidably supported inside the battery pack 10, and as shown in FIGS. 4 and 5, a stopper portion 31 that protrudes in a mountain shape at the upper portion, and a lower portion of the stopper portion 31. And a receiving portion 32 provided. Among these, the stopper portion 31 has an inclined surface 31a at the front and a vertical surface 31b at the rear. The stopper portion 31 is disposed so as to be able to protrude from the latch port 24, and protrudes and appears from the upper surface of the battery pack 10. Moreover, the receiving part 32 can receive the pressing part 41 of the operation member 40 mentioned later by forming a surface perpendicular | vertical with respect to the sliding direction of the engaging member 30. As shown in FIG.

  The spring 37 urges the engaging member 30 in the direction in which the stopper portion 31 engages with the mounting portion 101 of the electric power tool 100, and the lower portion of the spring 37 is placed on the case body 11 as shown in FIGS. 7 and 8. The upper end urges the engaging member 30 upward.

  In this way, the stopper member 31 protrudes from the latch port 24 so that the engaging member 30 biased by the spring 37 can be engaged with the mounting portion 101 of the electric power tool 100.

  As shown in FIGS. 4 and 6, the operation member 40 includes an operation unit 42 that is exposed from the operation opening 23 so as to be able to be pushed in, and a pressing unit 41 that is provided to extend inside the operation unit 42. And a support shaft portion 43 provided at the lower portion of the operation portion 42. The operation member 40 is supported by an operation member receiving portion 11c provided in the case body 11 so that a support shaft portion 43 is rotatable.

  The pressing portion 41 of the operation member 40 extends to a position where it contacts the receiving portion 32 inside the battery pack 10, and the vicinity of the tip thereof is in contact with the upper surface of the receiving portion 32 of the engaging member 30. For this reason, the biasing force of the spring 37 that biases the engaging member 30 upward is indirectly received and biased upward.

  The operation member 40 maintains the posture in which the operation unit 42 is substantially vertical in a normal state by the pressing unit 41 being biased upward (see FIG. 7). If the operation unit 42 is pushed inward from this state, as shown in FIG. 8, the support shaft 43 is used as an axis so that the upper part of the operation unit 42 falls down against the biasing force of the spring 37. At the same time, the pressing portion 41 is displaced downward. Then, when the pressing portion 41 pushes down the receiving portion 32 of the engaging member 30, the engaging member 30 is moved in the immersing direction, and the stopper portion 31 is formed to immerse and retreat inside the latch port 24. Yes.

  In the operation member 40 according to the present embodiment, the support shaft portion 43 is disposed below the operation portion 42, and the pressing portion 41 extends in the lateral direction of the support shaft portion 43. ), A fulcrum (support shaft 43), and an action point (pressing part 41) are arranged in a substantially L shape. With such an arrangement, the distance by which the pressing portion 41 slides on the receiving portion 32 is minimized as compared with the distance by which the pressing portion 41 presses the receiving portion 32 downward. .

  Specifically, as shown in FIG. 9, the contact point P between the pressing part 41 and the receiving part 32 when the stopper part 31 protrudes, and the contact point P between the pressing part 41 and the receiving part 32 when the stopper part 31 is immersed. , The moving distance V of the engaging member 30 in the protruding and retracting direction is significantly larger than the moving distance H of the engaging member 30 in the direction orthogonal to the protruding and protruding direction, and is five times or more. It has become. For this reason, when the operating member 40 is operated, the pressing portion 41 is formed so as to be pressed downward without almost sliding on the receiving portion 32.

  Further, the pressing portion 41 is disposed so as to push down the vicinity of the center of the receiving portion 32 provided at the lower portion of the stopper portion 31. Therefore, even if only one of the operation members 40 provided on both sides of the battery pack 10 is operated, the pressing portion 41 of the one operation member 40 is not connected to the receiving portion 32 of the engagement member 30. Since the vicinity of the center is pushed downward, the engaging member 30 can be moved downward without being inclined.

  When attaching such a battery pack 10 to the electric tool 100, the battery pack 10 is slid in the attachment direction with respect to the attachment portion 101. Then, the tip end portion 102a of the attachment portion 101 comes into contact with the inclined surface 31a of the stopper portion 31 and presses the inclined surface 31a in the sliding direction. The force applied in the sliding direction is converted into a force in the direction of retracting the stopper portion 31 (downward) by the inclined surface 31a of the stopper portion 31, and the stopper portion 31 is pushed inward. When the battery pack 10 is further slid in the attachment direction as it is, the stopper portion 31 is engaged with the engaged portion 106, and the attachment is completed. At this time, since the rear portion of the stopper portion 31 is the vertical surface 31b, the battery pack 10 is not detached from the attachment portion 101 even if a force that slides the battery pack 10 in the removing direction is applied.

  Further, when removing such a battery pack 10 from the electric tool 100, the operating portion 42 is operated to move the engaging member 30 in the immersion direction, and the engagement between the stopper portion 31 and the engaged portion 106 is performed. After the release, the battery pack 10 may be slid in the direction of removing it from the attachment portion 101.

  The present embodiment is as described above, and includes two operation members 40 provided on both sides of the battery pack 10 for operating the engagement member 30, and the operation member 40 includes an operation unit 42 that can be pushed in and operated. A support shaft portion 43 provided at the lower portion of the operation portion 42, and a pressing portion 41 extended to a position where it abuts on the receiving portion 32 of the engaging member 30, and the operation portion 42 is pushed inward. When it is operated, it rotates about the support shaft portion 43 as an axis, and the pressing portion 41 pushes down the receiving portion 32 to move the engaging member 30 in the immersion direction.

  Thus, since the engaging member 30 is moved by the pressing portion 41 extending to the lower side of the stopper portion 31, the pressing portion 41 only has to push the engaging member 30 downward, and the pressing portion 41 becomes the receiving portion 32. Since the sliding distance can be minimized, it is possible to minimize the influence of the rough sliding surface and the increased frictional resistance.

  Further, since the pressing portion 41 pushes down the engaging member 30 below the stopper portion 31, even if the operation load is biased between the two operation members 40 (or only one operation member 40 is operated). The engaging member 30 can be pushed down in the intended direction. In other words, the engaging member 30 does not tilt, and the engaging member 30 can be pushed down smoothly.

  In the above-described embodiment, an example in which an electric driving tool is used as the electric tool 100 and the battery pack 10 can be attached to the electric tool 100 has been described. However, the embodiment of the present invention is not limited thereto. . For example, an electric tool other than the electric driving tool (for example, an electric circular saw or an electric rod) can be similarly applied. Further, as shown in FIG. 10, the battery pack 10 may be attachable to the charger 200.

DESCRIPTION OF SYMBOLS 10 Battery pack 11 Case main body 11a Spring receiving part 11c Operation member receiving part 12 Battery cell 13 Battery 20 Lid member 21 Guide rail part 22 Groove 23 Operation opening 24 Latch port 30 Engaging member 31 Stopper part 31a Inclined surface 31b Vertical surface 32 Receiving part 37 Spring (biasing member)
40 Operating member 41 Pressing part 42 Operating part 43 Supporting shaft part 100 Power tool 101 Mounting part 102 Bottom panel 102a Tip part 103 Side hanging part 104 Guide ridge 105 Slide groove 106 Engagement part 200 Charger P When the stopper part protrudes Contact point P ′ Contact point when the stopper part is retracted V Distance that the contact point moves in the direction in which the engaging member protrudes and retracts H Distance that the contact point moves in the direction perpendicular to the extending and retracting direction of the engaging member

Claims (5)

A battery pack that can be attached to and detached from a mounting portion of a target device such as a power tool,
An engagement member provided with a stopper portion protruding from the upper surface of the battery pack;
Two operating members provided on both sides of the battery pack for operating the engaging member;
A biasing member that biases the engagement member in a direction in which the stopper portion engages with the attachment portion;
With
The engaging member includes a receiving portion at a lower portion of the stopper portion,
The operation member includes an operation part that can be pushed in, a support shaft part provided in the operation part, and a push-down part that extends to a position in contact with the receiving part. The battery pack according to claim 1, wherein when the push-in operation is performed, the battery pack rotates about the support shaft portion, and the push-down portion moves the engagement member in the immersion direction by pushing down the receiving portion.   As for the contact point between the pressing portion and the receiving portion when the operation member is rotated, the distance that the contact point moves in the protruding and retracting direction of the engagement member moves in the direction perpendicular to the protruding and protruding direction. The battery pack according to claim 1, wherein the battery pack is larger than a distance to be measured.   3. The battery pack according to claim 1, wherein the operation member is configured such that the operation portion, the support shaft portion, and the pressing portion are arranged in a substantially L shape.   An electric tool, wherein the battery pack according to any one of claims 1 to 3 is detachable.   A battery charger, wherein the battery pack according to any one of claims 1 to 3 is detachable.

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