WO2012005159A1 - Structure for installing a battery pack - Google Patents

Abstract

In battery power tools, an identification protrusion was conventionally provided on a battery installation unit to prevent the installation of non-compatible batteries that do not conform to specifications such as rated voltage of the tool body. Conventionally, this identification protrusion was made of synthetic resin, which resulted in the problem of said identification protrusion having low resistance to impact during interference with the battery pack. In the disclosed structure for installing a battery pack, said identification protrusion has an improved durability. An identification protrusion (17) is made from a higher-strength metal plate, a material different from the synthetic resin of the terminal block (14) on which said identification protrusion (17) is provided. Because the identification protrusion (17) is made of metal, the impact resistance thereof is increased to a level higher than that of conventional synthetic resin-made identification protrusions, and by this means the identification protrusion (17) can be thinner, allowing adaptation to more specifications.

Description

Battery pack mounting structure

The present invention relates to a structure for attaching the battery pack to an electric tool that is a power tool such as a hand-held electric plane or a cutting machine and includes the battery pack as a power source.

In recent years, about this kind of electric tool, what operates using a DC power supply instead of an AC power supply has become widespread. The direct current power is supplied by a battery pack (battery). Battery-type electric tools have been rapidly spreading in recent years because they can be used in various workplaces with or without power supply equipment or without using an extension cord or the like. In addition, a rechargeable battery pack that can be used repeatedly by removing it from the tool body side and charging has become the mainstream. For the battery pack, an insertion type or a slide type is provided as an attachment method to the tool body.
In addition, battery packs of various standard voltages such as 14.4V and 18V are provided corresponding to the specifications (rated voltage) of the tool body to be attached. However, in this type of battery pack, even when the rated voltage is different, the configuration of the mounting part such as the spacing between terminals and the mounting slide rail is compatible for the purpose of sharing parts. In this case, if no measures are taken to prevent erroneous mounting, for example, an 18V battery pack may be erroneously mounted on a 14.4V specification model. For this reason, conventionally, a device for preventing the attachment of a non-compliant battery that does not conform to the specification on the tool body side (an erroneous mounting prevention structure) has been made for the battery mounting portion of the insertion mounting type and the slide mounting type.
In Patent Document 1 below, a battery pack that conforms to the specifications can be slid and attached to the mounting restricting portion provided in the battery mounting portion of the tool body without interference and is not compatible. In the case of a battery pack, the identification protrusion provided on the battery pack cannot pass through the attachment restricting portion on the tool body side and cannot be slid further, and as a result, this non-compliant battery cannot be attached. Thus, a technique for preventing the erroneous mounting is disclosed. Patent Document 2 discloses a technique for preventing erroneous mounting of a battery pack that is not a slide type but a plug-in type. Further, in Patent Document 3, a protrusion or groove is provided in the battery mounting portion (terminal block) of the tool body for identifying a slide-mounted battery pack, and a protrusion or groove is also provided on the battery pack side correspondingly. A technique for preventing erroneous mounting of an incompatible battery pack by providing a groove is disclosed.

International Publication No. 2009/037040 US Pat. No. 7,588,471 Japanese Patent Laid-Open No. 2007-144813

However, in recent years, large and heavy battery packs such as DC36V have become widespread, and it is necessary to cope with more types of standard voltages in the future as to the erroneous mounting prevention structure. For this reason, the battery mounting part of the tool main body is provided with an identification projection part for preventing erroneous mounting on a terminal block prepared as a separate part while making the slide rail part, etc. common to the parts. There is provided a technique for preventing the non-compliant battery from being erroneously mounted by interfering with the battery pack and regulating its slide mounting operation.
In this way, when adopting a configuration that prevents the wrong mounting of a non-compliant battery by providing an identification protrusion for preventing erroneous mounting on the terminal block of the tool body, the identification protrusion is limited while sharing parts. Since it is necessary to shift the position little by little in the narrow space formed, the identification protrusion may be forced to be thin (thinned).
However, since the identification protrusion for preventing erroneous mounting is generally formed integrally with a resin terminal block, the durability of the identification protrusion decreases if the identification protrusion is thinned. . In particular, when a heavy battery pack such as a 36V battery pack is slid and attached to the battery mounting portion of the tool body, the identification protrusion is easily damaged due to an impact at the time of interference.
It is an object of the present invention to enhance the durability of the identification protrusion in the case where an identification protrusion that restricts the sliding motion at the time of attachment is provided to prevent the attachment of a non-compliant battery pack that does not conform to the specifications of the tool body. .

The above problems are solved by the invention having the following configuration.
1st invention is the attachment structure with respect to the battery attachment part of the battery pack in the electric tool which attaches a battery pack to the battery attachment part of a tool main body, and uses it as a power supply, Comprising: A battery is attached to one or both of a battery attachment part or a battery pack. An identification protrusion is provided for restricting the attachment of a battery pack outside the specification to the attachment portion, and for identifying whether the battery is a compatible battery that does not conform to the specification or a non-compliant battery. However, the mounting structure is formed of a material having a strength higher than that of the battery mounting portion or the battery pack.
In the first invention, the identification protrusion provided for identifying whether or not the battery pack conforms to, for example, the rated voltage (specification) of the tool body is stronger than the material of the battery mounting portion on which the battery pack is provided. Is made of a large material (for example, metal). By making this identification protrusion part into a metal material, for example, it is possible to exhibit higher durability in terms of impact resistance and the like than a conventional resin identification protrusion part.
The metal material identification protrusion is a battery mounting portion of the tool body, for example, a configuration provided on a resin terminal block, a configuration provided on a resin battery pack housing, or a configuration provided on both. In any case, the metal identification projection can be provided by insert molding when resin molding is performed.
As described above, according to the first aspect, the battery mounting portion of the tool body has the terminal block including the plus terminal and the minus terminal, the terminal block is manufactured by resin molding, and the identification protrusion is the resin. Rather than being provided integrally at the time of molding, the durability of the identification protrusions can be increased as compared with the prior art, for example, by separately producing a metal material having a higher strength, for example, by insert molding.
A second invention is an attachment structure according to the first invention, wherein the material of the identification protrusion is a metal. In the second invention, the battery pack or the battery mounting portion is made of resin, and the identification protrusion is made of metal. According to the second invention, the identification protrusions such as a metal plate separately manufactured at the time of resin molding of the battery mounting portion or the battery pack can be assembled by insert molding.
A third invention is an attachment structure according to the second invention, wherein the identification protrusion is a metal plate. According to the third aspect of the invention, since the identification protrusion can be made thinner than the conventional resin identification protrusion while ensuring its durability, the arrangement portion is limited without being largely moved. In a narrow space, it is possible to cope with a wider variety of standards mainly for the output voltage of the battery pack.
According to a fourth aspect of the present invention, in any one of the first to third aspects, the identification protrusion is provided in the battery attachment portion, and the battery attachment portion is a positive electrode extending along the attachment direction of the battery pack. The mounting structure includes a terminal and a negative electrode terminal, and the identification protrusion is disposed on the side of the positive electrode terminal or the negative electrode terminal.
According to a fifth aspect, in the fourth aspect, the identification protrusion is disposed between the plus terminal and the minus terminal or between the extended lines of both terminals.
According to a sixth aspect, in the fifth aspect, the identification protrusion is arranged on the front side in the mounting direction with respect to the plus terminal and the tip of the minus terminal. According to the sixth aspect of the invention, the suitability of the specification of the battery pack is identified by the identification protrusion before the positive and negative contacts of the battery pack are connected to the positive and negative terminals of the battery mounting portion. .
In a seventh aspect based on the first aspect, the battery mounting portion is a mounting structure in which a plus terminal, a minus terminal, and an identification protrusion are provided on a resin terminal block.
An eighth invention is an attachment structure of a battery pack to a charger for removing a battery pack used as a power source of the electric tool from the electric tool for charging, and is attached to one or both of the battery pack and the battery receiving portion of the charger. The battery is equipped with an identification protrusion for restricting the attachment of the battery pack outside the specification to the battery receiving part and identifying whether the battery is a compatible battery or a non-compliant battery. This is a mounting structure in which the protruding portion is formed of a material having a strength higher than that of the battery pack or the battery receiving portion.
According to the eighth aspect of the invention, the battery pack can be removed from the battery mounting portion of the tool body and charged by the charger. If the battery pack is a non-compliant battery that does not meet the specifications when attached to the charger, for example, the metal identification protrusion cannot interfere with the battery pack, and the battery pack outside the specifications cannot be It is prevented from being attached to. In this way, the identification protrusion is made of a material that is metallic and has a higher strength than the battery receiving portion or battery pack of the charger, thereby exhibiting higher durability than the conventional identification protrusion made of resin. be able to.
A ninth invention is the battery pack according to any one of the first to eighth inventions, in addition to a battery pack that does not conform to the rated voltage of the power tool or the charger, as an out-of-specification battery. It is the attachment structure for the adapter main body of the battery adapter that supplies the power to the power tool via the adapter main body.
According to a ninth aspect of the present invention, in any one of the first to eighth aspects, in addition to a battery pack mounting structure for a power tool body, a battery pack mounting structure for a charger, or a battery adapter for a tool body. This is a configuration applied to the mounting structure.
According to the ninth aspect of the present invention, various types of battery packs are mounted, and the durability of the identification protrusion for preventing the attachment of a non-compliant battery pack that does not conform to the specification of the object to be attached is further increased. It can be made to correspond to the battery pack.
A tenth aspect of the invention is an attachment structure for a battery attachment portion of the battery pack in an electric tool that uses a battery pack attached to a battery attachment portion of a tool body as a power source, and one or both of the battery pack and the battery attachment portion, An identification protrusion is provided for restricting the attachment of a battery pack outside the specification to the battery attachment portion, and for identifying whether the battery is a compatible battery that does not conform to the specification or a non-compliant battery. This is an attachment structure in which the part is formed of a material different from that of the battery attachment part or the battery pack.
According to the tenth aspect of the present invention, the identification protrusion that restricts the attachment of the non-compliant battery pack when one or both of the battery attachment portion and the battery pack interfere with each other is formed of a material different from the portion where it is provided. By doing so, the durability can be enhanced.
An eleventh aspect of the invention is an attachment structure of the first and second battery packs to the first and second electric tools, wherein only the second battery pack can be attached to the first electric tool. It is the attachment structure which enabled attachment of both the 1st and 2nd battery pack with respect to 2 electric tools.
According to the eleventh aspect of the invention, it is identified whether the battery can be attached to or cannot be attached to the tool body on the basis of various factors such as a difference in position or shape of the identification protrusion, or a difference between AS correspondence and non-correspondence. be able to.

It is a whole perspective view of the electric plane provided with the attachment structure concerning the embodiment of the present invention. In the figure, the battery pack is shown attached. It is a whole perspective view of an electric plane. In this figure, the battery pack is shown in a removed state. FIG. 3 is a rear view of the electric plane, and is a view of the battery mounting portion as viewed from the direction of arrow (III) in FIG. 2. It is a top view of a battery pack. It is a cross section of the battery attachment part of a battery pack attached state. It is the (VI)-(VI) arrow view of FIG. 1, Comprising: It is a longitudinal cross-sectional arrow view of a battery pack and a battery attachment part. This figure has shown the stage in the middle of attaching a battery pack by sliding with respect to a battery attachment part. It is a perspective view of another form of battery pack provided with the identification protrusion part. It is a perspective view of the charger provided with the identification protrusion part. It is a perspective view of a battery adapter. This figure has shown the state which attached the battery pack to the portable attachment part of a battery adapter. It is a block diagram which shows embodiment of this invention. It is a block diagram which shows another embodiment of this invention.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an electric plane 1 as an example of an electric tool that uses a battery pack 20 as a power source. The present embodiment is characterized by the structure for attaching the battery pack 20 to the battery attachment portion 10 of the electric plane 1, and the tool body 2 of the electric plane 1 does not require any particular change, and thus detailed description thereof is omitted. The tool body 2 is internally provided with a drive system that rotates the cannula blade using the electric motor 5 as a drive source. A handle portion 3 that is gripped by the user is provided on the upper portion of the tool body 2. An adjustment dial 4 for adjusting the cutting depth of the canine blade is provided at the front portion of the tool body 2. A battery mounting portion 10 is provided across the tool main body 2 and the rear portion of the handle portion 3. A battery pack 20 is attached to the battery attachment portion 10 and power is supplied to the tool body 2 such as the electric motor 5. In this embodiment, the rated voltage of the tool body 2 (electric motor 5) is 18V. Therefore, as will be described below, only the battery pack 20 with an output voltage of 18V can be attached to the battery attachment portion 10, and a non-compliant battery such as a 14.4V battery or a 36V battery cannot be attached. It has become.
The tool body 2, the handle portion 3, and the battery mounting portion 10 are integrally formed by left and right half housings 1L and 1R that are resin molded products.

The battery mounting portion 10 is provided with a pair of left and right slide rail portions 11, 11. Both the slide rail parts 11 and 11 are parallel to each other and extend along the top and bottom. The battery pack 20 can be attached to the battery mounting portion 10 by sliding the battery pack 20 from the upper side to the lower side with respect to both the slide rail portions 11 and 11.
A terminal block 14 is attached between the slide rail portions 11 and 11 and substantially at the center of the battery attachment portion 10. The terminal block 14 is manufactured and assembled separately from the left and right half housings, and is formed into a flat plate shape by resin molding.
A positive (positive electrode) terminal 12P and a negative (negative electrode) terminal 12N are arranged on the terminal block 14. The plus terminal 12P and the minus terminal 12N have a flat plate shape, and are parallel to each other and extend vertically. The plus terminal 12P and the minus terminal 12N are fixed to the terminal block 14 by insert molding. The plus terminal 12P and the minus terminal 12N are electrically connected to the power supply circuit of the tool body 2.
An auxiliary terminal 16 for detecting overdischarge is provided between the positive terminal 12P and the negative terminal 12N. The auxiliary terminal 16 is also integrally provided on the terminal block 14 by insert molding.
Further, as shown in FIGS. 2, 3 and 5, the terminal block 14 is provided with a metal identification protrusion 17. The identification protrusion 17 is integrally provided on the overhanging portion 14a provided on the upper right side of the terminal block 14 by insert molding. The identification protrusion 17 is disposed near the tip (near the upper end) of the plus terminal 12P and on the right side thereof.
A claw hooking portion 15 to which a lock claw 21 of the attached battery pack 20 is hooked is provided on the upper portion of the battery mounting portion 10. When the user pushes down the lock claw 21 to release the hooked state with respect to the claw hooking portion 15, the battery pack 20 can be slid upward and removed from the battery mounting portion 10.

As shown in FIG. 5, a pair of left and right rail portions 22 are provided on the upper surface of the battery pack 20. The battery pack 20 can be attached to the battery attachment portion 10 by engaging the rail portions 22 and 22 with the left and right slide rail portions 11 and 11 of the battery attachment portion 10 and sliding the battery pack 20 downward. .
The identification protrusion 17 described above is disposed at a position where it does not interfere with the rail portion 22 with respect to the position in the left-right direction. For this reason, the battery pack 20 can be attached to the battery attachment portion 10 by sliding downward. The identification protrusion 17 identifies that the battery pack 20 is a compatible battery that meets the specifications of the tool body 2.
If an attempt is made to attach a non-compatible battery of 36V, for example, to the identification protrusion portion 17, the rail portion interferes with it, so that the battery pack cannot be attached. Even when the heavy 36V battery is slid to interfere with its rail part, the identification protrusion 17 is made of metal, so it will not be damaged, and its durability is ensured compared to conventional resin. It has come to be.
Based on the position of the identification protrusion 17 in the left-right direction with respect to the rail portion 22, it is identified whether the battery is a compatible battery that is compatible with the battery mounting portion 10 or a non-compatible battery that is not compatible. For example, when the identification protrusion 18 is provided at a position shifted to the left of the identification protrusion 17 as shown by a two-dot chain line in FIGS. 4 to 6, the identification protrusion 18 interferes with the slide rail. The 18V battery pack 20 cannot be slid and attached. In this case, for example, a 14.4V battery pack or a 36V battery pack provided with a relief groove at a corresponding portion of the slide rail can be used as the corresponding battery. Therefore, the identification protrusion 17 is for 18V battery, the identification protrusion 18 is for 18V battery non-correspondence, any position or according to the battery pack conforming to the specification (rated voltage) of the tool body 2 By providing identification protrusions at other positions that are displaced to the left and right, it is possible to identify whether the battery pack is compatible or not compatible with other specifications.

Between the left and right rail portions 22, 22, a plus slit portion 23 for connecting a plus terminal and a minus slit portion 24 for connecting a minus terminal are provided. In the plus slit portion 23, two plus contacts 23a, 23a are arranged at regular intervals in the direction of attaching and detaching the battery pack 20 (up and down directions indicated by white arrows in FIG. 4). Similarly, in the minus slit portion 24, two minus contacts 24a and 24a are arranged at regular intervals in the direction in which the battery pack 20 is attached and detached.
When the battery pack 20 is attached to the battery attachment portion 10, the plus terminal 12P of the battery attachment portion 10 enters the plus slit portion 23 and is connected to the plus contacts 23a and 23a, and the minus terminal 12N is the minus slit portion. It enters into 24 and is connected to negative contacts 24a, 24a.
An auxiliary slit portion 25 and a connector portion 26 are arranged between the plus slit portion 23 and the minus slit portion 24. One auxiliary contact 25 a is disposed in the auxiliary slit portion 25. The positive contacts 23a and 23a and the negative contacts 24a and 24a are connected to the respective battery cells via a control circuit incorporated in the battery pack 20, and the auxiliary contact 25a is also connected to the control circuit.
As described above, the identification protrusion 17 of the battery mounting portion 10 is disposed on the side of the vicinity of the tip of the plus terminal 12P (near the upper end in FIGS. 2 and 3). Moreover, the vertical position of the identification protrusion 17 (the direction along the longitudinal direction of the plus terminal 12P) is determined when the non-compliant battery pack is slid downward to be attached to the battery attachment portion 10. Before the plus terminal 12P and the minus terminal 12N enter the plus slit portion 23 and the minus slit portion 24 of the battery pack 20 and come into contact with the plus contact 23a and the minus contact 24a, respectively, at positions where they interfere with the rail portion 22. Is set.
For this reason, when an incompatible battery is to be mounted, the sliding operation is performed before the battery pack is electrically connected to the battery mounting portion 10 (before the terminals 12P and 12N are in contact with the contacts 23a and 24a). Is identified as a non-compliant battery, thereby preventing an overcurrent from flowing to the tool body 2 side, and thus preventing its damage.

According to the mounting structure of the present embodiment configured as described above, the identification protrusion 17 for identifying whether the battery is a compatible battery that conforms to the specifications of the tool body 2 or a non-compatible battery that does not conform to the specification. Since it is made of metal unlike the resin made of the above, it is less likely to be damaged or the like even if the rail portion of the non-compliant battery is caused to interfere, for example, so that the durability can be enhanced.
In addition, since the metal plate is configured to be the identification protrusion portion 17, sufficient strength and impact resistance (even if the plate thickness is made thinner than the resin-made identification protrusion portion having a conventional block body shape) Durability) can be ensured, for example, by changing the position in the left-right direction (position in the plate thickness direction) within a limited narrow space on the overhanging portion 14a, it can handle battery packs with different specifications Thus, the non-corresponding identification function can be surely exhibited.

Various modifications can be made to the embodiment described above. For example, although the structure which provided the identification protrusion part 17 for identifying the correspondence of the specification of the battery attachment part 10 and non-correspondence in the terminal base 14 was illustrated, it is not the terminal base 14 but the battery attachment part 10 to which this is assembled. It is good also as a structure directly provided in a housing part.
Moreover, although the structure which provided the identification protrusion part 17 in the battery attachment part 10 side was illustrated, it obtains the same effect by providing the metal identification protrusion part 31 in the battery pack 30 side, as shown in FIG. Can do. In this case, the identification protrusion 31 is a metal plate and is attached to the upper surface of one rail portion 32. By causing the identification protrusion 31 to interfere with the slide rail on the battery attachment portion side, the slide attachment operation is restricted, thereby identifying the non-compliant battery. About the battery attachment part which uses this battery pack 30 as a corresponding | compatible battery, it can be set as the structure which provides the escape groove part which permits passage of the identification protrusion part 31 in the slide rail, and permits the slide operation | movement.
In this manner, the metal identification protrusion can be configured to be provided on the battery mounting portion 10 side or the battery pack 30 side, and further provided on both sides to be able to identify more types of specifications. It can be.
In addition to the configuration in which the identification protrusion is arranged on the side of the tip of the plus terminal 12P as illustrated, the tip of the minus terminal 12N, the side of the plus terminal 12P and the minus terminal 12N, or the plus terminal 12P It is good also as a structure arrange | positioned at the side of an extension line, the side of the extension line of the minus terminal 12N, or between both extension lines. Therefore, the interference part of the non-compliant battery that restricts the sliding operation of the non-compliant battery by interfering with the identification protrusion is not limited to the configuration of the one rail part tip as illustrated above, but various other types. A site can be set.
Moreover, although the structure which identifies corresponding | compatible and non-corresponding by changing the position of the thickness direction of an identification protrusion part was illustrated, it can also be set as the structure identified by changing the height dimension.

Further, the identification protrusion for identifying the correspondence or non-correspondence of the battery pack may have a configuration made of metal (metal plate) or a configuration made of a ceramic material as illustrated. In short, by forming the identification protrusion with a material that is different from the synthetic resin that is the battery mounting part or battery housing material and that is more durable in terms of impact resistance, etc. Compared to the identification protrusions made of synthetic resin, it is possible to reduce the thickness or size while ensuring the durability. As a result, the battery pack can be used for more specifications (rated voltage, size, etc.). The correspondence can be identified.
Moreover, although the attachment structure of the battery pack 20 with respect to the battery attachment part 10 of an electric tool (electric plane 1) was illustrated, it can apply similarly also about the attachment structure of the battery pack with respect to the charger 40 as shown in FIG. . As shown in the figure, the battery receiving portion 41 of the charger 40 is provided with a pair of left and right slide rail portions 42, 42 corresponding to the slide rail portions 11, 11 of the battery mounting portion 10. A minus terminal 44 and a plus terminal 45 are arranged between the left and right slide rail portions 42, 42. The minus terminal 44 is inserted into the minus slit portion of the battery pack, and the plus terminal 45 is inserted into the auxiliary slit portion of the battery pack and is connected to the contact on the battery pack side.
As shown in the drawing, a metal identification protrusion 43 is provided on the front side in the battery mounting direction with respect to the negative terminal 44. By making this identification protrusion 43 interfere with, for example, a rail portion of a non-compliant battery, the erroneous mounting can be prevented in advance. Since the identification protrusion 43 is disposed on the front side of the minus terminal 44 in the battery mounting direction, the corresponding or non-corresponding identification is made before the battery pack is electrically connected, thereby causing damage to the device. Etc. are prevented in advance.

FIG. 9 shows the battery adapter 50. The battery adapter 50 includes an adapter main body 51 that can be attached to the battery attachment portion 10 of the tool main body 2 and a portable attachment portion 52 to which the battery pack 20 can be attached. The adapter main body 51 and the portable attachment portion 52 are appropriate. They are electrically connected by an electric cord 53 having a length. The adapter main body 51 has the same configuration as the battery pack 20 with respect to the mounting structure for the battery mounting portion. However, the adapter main body 51 is extremely light in weight as compared with the battery pack 20 because the battery pack 20 itself does not have a battery cell. The portable attachment part 52 is provided with a hook 54 that can be hooked on the user's waist belt.
The battery adapter 50 can be used by attaching a lightweight adapter main body 51 to the battery mounting portion 10 of the tool main body 2 and suspending the portable mounting portion 52 to which the heavy battery pack 20 is attached to a waist belt or the like. Since the power tool 1 can be handled with a light operating force, the operability and workability of the power tool 1 can be greatly enhanced.
Even when an 18V battery is connected to the battery mounting portion 10 of the tool main body 2 via the battery adapter 50, the non-compliant battery (adapter main body 51) outside the specification is attached by the metal identification protrusion 17. If the non-compliant battery is erroneously attached, the identification protrusion 17 cannot interfere with the rail portion of the adapter main body 51 and cannot be attached.
When such a battery adapter 50 is used, instead of or in addition to the identification protrusion 17 of the battery attachment part 10 of the tool body 2, the portable attachment part 52 is provided with a similar identification protrusion so that the portable attachment can be performed. It is possible to prevent erroneous attachment of the non-compliant battery to the unit 52.
The identification protrusions of various forms described above are integrally provided on the terminal block or the housing by insert molding, but may be separately fixed at predetermined positions by means such as screwing or welding.
Lastly, the electric plane 1 has been illustrated as an example of the electric tool. However, the present invention is widely applied to a battery pack mounting structure in other electric tools such as a cutting machine such as a portable maroon and an electric drill for drilling. Can do.

In the battery mounting structure exemplified above, the 18V battery 20 can be mounted on the tool (electric plane 1) with the rated voltage of 18V including the identification protrusion 17, and the 36V battery cannot be mounted as an incompatible battery. On the other hand, for example, a tool with a rated voltage of 14.4V including the identification protrusion 18 is configured so that the 18V battery 20 cannot be attached as a non-compatible battery.
As a reference for identifying a compatible battery that can be mounted as a result of conforming to the specifications of the tool body (mainly rated voltage) and a non-compliant battery that cannot be mounted as a result of conforming to the specifications of the tool body, the output voltage of the illustrated battery is By setting different standards, the mounting structure can be an invention developed into a broader concept.
For example, as shown in FIG. 10, the first tool T1 of 14.4V specification and the second tool T2 of 18V specification, which are heavy load tools, respectively, correspond to the auto-stop function (AS), respectively, and have the same capacity (for example, , 1.5 Ah) of the first battery B1 (18V) and the second battery B2 (14.4V), the first battery B1 cannot be connected to the first tool T1, and the second The battery B2 can be connected, and the second tool T2 can be developed into an attachment structure in which both the first and second batteries B1 and B2 can be connected (11th invention). The illustrated embodiment corresponds to one embodiment of the eleventh invention.
In the eleventh aspect of the invention, the first tool T1 includes a first restricting portion K1, and the second tool T2 includes a second restricting portion K2 having a shape different from that of the first restricting portion K1. (Twelfth invention).
In the eleventh or twelfth aspect of the invention described above, the first battery B1 includes the first restriction receiving portion R1, and the second battery B2 has a second restriction different in shape from the first restriction receiving portion R1. It can be set as the attachment structure provided with receiving part R2 (13th invention). The difference in the shape of the restriction portion or the restriction receiving portion can include not providing the restriction portion or the restriction receiving portion.
In any one of the eleventh to thirteenth inventions described above, the first and second tools T1, T2 have a mounting structure that is a heavy load tool (for example, a marnoco with a rated voltage of 18V) having a load current of about 30A. (14th invention).
In any one of the eleventh to fourteenth aspects, the first and second batteries B1 and B2 may have a mounting structure with a rated capacity of 1.5 Ah (fifteenth aspect).
The mounting structure according to any one of the eleventh to fifteenth inventions can be applied to a charger capable of charging the first and second batteries B1 and B2 (sixteenth invention).
In any one of the eleventh to fifteenth inventions, the motor drive stop signal (AS signal) is generated from the first and second battery B1 and B2 side by the overcurrent of the first and second batteries B1 and B2. This is output to the tools T1 and T2 side, and thereby an attachment structure having an auto-stop function (AS) for stopping the tool body by driving the FET can be obtained (17th invention).
Furthermore, in any one of the eleventh to fifteenth inventions, an FET on the battery B1, B2 side is generated by the motor drive stop signal (AS signal) output by the overcurrent of the first and second batteries B1, B2. Can be provided with an auto-stop function (AS) for stopping the tool body by driving (18th invention).
In the seventeenth and eighteenth aspects of the invention, as a condition for outputting the AS signal, instead of or in addition to the exemplified overcurrent detection, for example, a voltage drop due to overdischarge or a battery cell temperature condition is constant. It can be the time when the value is reached.

The battery mounting structure can be further understood as the following invention. As shown in FIG. 11, the third tool T3, which is a heavy load tool, and the fourth tool T4, which is a light load tool, and a third battery B3 and an AS compatible fourth battery, each having the same capacity and not supporting AS. When considering B4, it is possible to identify whether a battery can be attached or not attached based on AS support or non-support. In the case of the mounting structure shown in FIG. 11, the third battery T3 that is not AS-compatible cannot be attached to the third tool T3 that is an AS-compatible heavy load tool, and only the fourth battery B4 that is AS-compatible. Can be attached. In addition, any of the third and fourth batteries B3 and B4 can be attached to the fourth tool T4, which is a light load tool that does not support AS, regardless of whether the tool is compatible with AS or not.
Accordingly, in the eleventh aspect of the invention, the third battery B1 for AS that can output a motor drive stop signal (AS signal) when an overcurrent is detected, and the fourth for non-AS that does not output an AS signal. The battery B4 can be included (19th invention). In this case, each of the third and fourth batteries B3 and B4 can include one of the same capacity (for example, 1.5 Ah) in one cell series.
In addition, the eleventh invention can include a heavy load tool T3 (for example, a marnoco having a rated voltage of 18V) having a load current of 20A and a light load tool T4 having a load current of less than 20A (for example, an impact driver having a rated voltage of 18V). (20th invention). In the twentieth aspect, a battery that can be attached and a battery that cannot be attached are distinguished by the magnitude of the output of the tool body.
Furthermore, the mounting structure according to the nineteenth or twentieth invention can be applied to a charger capable of charging the third battery B3 and the fourth battery B4.

Claims (10)

It is an attachment structure for the battery attachment part of the battery pack in an electric tool that attaches a battery pack to a battery attachment part of a tool body and uses it as a power source,
Whether the battery attachment part or the battery pack is a compatible battery that conforms to the specification or a non-compliant battery that restricts the attachment of the battery pack outside the specification to the battery attachment part to one or both of the battery attachment part An attachment structure including an identification protrusion for identification, wherein the identification protrusion is formed of a material having a strength higher than that of the battery attachment portion or the battery pack. The attachment structure according to claim 1, wherein a material of the identification protrusion is a metal. The attachment structure according to claim 2, wherein the identification protrusion is a metal plate. The attachment structure according to any one of claims 1 to 3, wherein the identification protrusion is provided on the battery attachment portion, and the battery attachment portion extends along an attachment direction of the battery pack. An attachment structure comprising an extending positive electrode terminal and a negative electrode terminal, wherein the identification protrusion is disposed on a side of the positive electrode terminal or the negative electrode terminal. 5. The attachment structure according to claim 4, wherein the identification protrusion is disposed between the positive terminal and the negative terminal or between an extension line of the positive terminal and an extension line of the negative terminal. . The attachment structure according to claim 5, wherein the identification protrusion is disposed on the front side in the attachment direction of the battery pack with respect to the positive electrode terminal and the tip of the negative electrode terminal. The mounting structure according to claim 1, wherein the battery mounting portion includes a positive terminal, a negative terminal, and the identification protrusion on a terminal block made of resin. An attachment structure of the battery pack with respect to a charger for removing and charging a battery pack used as a power source of the electric tool,
The battery pack or the battery receiving part of the charger is restricted to a non-compliant battery that conforms to the specification by restricting the attachment of the battery pack outside the specification to the battery receiving part, or a non-compliant battery that conforms to the specification. An attachment structure including an identification protrusion for identifying whether there is any, and the identification protrusion being formed of a material having a strength higher than that of the battery pack or the battery receiving portion. The mounting structure according to any one of claims 1 to 8, wherein the battery pack is a non-compliant battery outside the specification, in addition to a battery pack that does not conform to a rated voltage of the power tool or the charger. An attachment structure for the adapter body of a battery adapter that supplies power from the battery tool to the electric tool through the adapter body. It is an attachment structure for the battery attachment part of the battery pack in an electric tool that attaches a battery pack to a battery attachment part of a tool body and uses it as a power source,
Whether one or both of the battery pack and the battery mounting portion is a compatible battery that conforms to the specification or a non-compatible battery that restricts the attachment of a battery pack outside the specification to the battery mounting portion. An attachment structure comprising an identification protrusion for identification, wherein the identification protrusion is formed of a material different from that of the battery attachment part or the battery pack.

Images