JP5090256B2 - Charger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the dust resistance of a connecting terminal in case that a charger is made wall-mountable, and improve its handiness at mounting and removal of a battery pack, in a charger which charges a charge type battery pack mainly for power tools. <P>SOLUTION: There is provided a wall mounting part so that the direction of mounting and removal of the battery pack 1 to the battery joint 20 of the charger 10 may be parallel and also lateral along the wall W, while it is hung down on the wall W. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a charger for removing a battery pack used as a power source for a hand-held power tool, for example, from a tool body and charging the battery pack.

A rechargeable battery pack used as a power source for an electric tool includes, for example, a plurality of cylindrical battery cells, and is detachably attached to, for example, a tip of a handle portion of the electric tool. Various types of battery packs are provided, such as ones that can be inserted into and removed from the tip of the handle part, or ones that can be slid and attached to the tip of the handle part. Has been. In the case of the latter slide detachable battery pack, it usually has a rectangular box shape, and is mounted by sliding, for example, against the tip of the handle part via slide rails provided on both sides thereof, Conversely, it can be removed.
The charger for removing and charging the slide-type battery pack from the electric tool body has a box shape large enough to be carried with one hand, for example, for mounting the battery pack on the upper surface thereof. A battery mounting part is provided. The battery mounting portion can be mounted and removed by sliding the battery pack in the same manner as the mounting method for the handle portion of the tool body. When the battery pack is slid and attached to the battery attachment portion, the connection terminal portion is connected to the connection terminal portion on the charger side and can be charged.
Conventionally, various improvements have been made on this type of charger as described in the following patent documents. For example, in addition to being able to be used by placing a charger on a workbench, a battery pack that can be charged in a wall-mounted state when there is not enough installation space on the workbench is provided.
In the case of this wall-mounted charger, a wall-mounted hook hole is provided on the rear surface (surface opposite to the front surface on which the battery mounting portion is provided). By hooking the hook on the wall side to the hole, the charger can be hung on the wall.
Japanese Utility Model Publication No. 45-15411 No. 7-47612 JP 2004-147360 A

However, the conventional wall-mounted charger has a configuration in which the connection terminal portion of the battery mounting portion and the control signal connector portion (hereinafter also simply referred to as a connection connector portion) are hung on the wall in an open state. Therefore, there is a problem that dust or the like tends to accumulate in the connection connector portion.
The present invention is a wall-hangable charger, and it is an object of the present invention to prevent dust and the like from being accumulated in a connecting connector portion thereof.

For this reason, this invention was set as the charger of the structure described in each claim of a claim.
According to the charger of the first aspect, the moving direction of the battery pack when the battery pack is mounted and removed in the wall-mounted state is the direction along the wall and the lateral direction. For this reason, the attachment / detachment direction of the battery pack with respect to the battery attachment part is horizontal, and the connection terminal part and the connection connector part are opened sideways. Property (property that dust and the like do not easily enter) can be improved.
According to the charger according to claim 2, the battery pack is attached and removed by moving the battery pack laterally with respect to the connection connector portion in a state where the charger is hung on the wall. Can do. When the battery pack is mounted and removed to move laterally, the direction of movement is perpendicular to the direction in which the hook hole on the back extends (up and down direction). The hooked state with respect to the hole is maintained, so that the battery pack can be securely attached and detached while maintaining the wall-hanged state of the charger, and the handling and operability of the charger can be improved. .
According to the charger of the third aspect, since the hooking hole portion is provided in both the vertical direction with respect to the insertion hole portion of the wall hanging portion, the charger is turned upside down to be hung on the wall in any direction. I can keep it. For this reason, by turning the charger upside down and hanging it on the wall, the battery pack can be moved and mounted laterally from either the left or right side, so it can be left-handed. Good operability can be ensured for both the right-handed user and the right-handed user.
In addition, by moving the battery pack upside down and hanging it on the wall, the direction of movement of the battery pack can be arbitrarily selected from left to right. For example, the battery pack is moved laterally to the left or right side of the battery mounting portion. When there is not enough space for the battery pack, the battery pack can be attached to and removed from the charger using the other space, thereby increasing the degree of freedom in selecting the wall hanging position of the charger. .
According to the charger of the fourth aspect, in addition to the dustproof property of the battery mounting portion, the waterproof property inside the charger can be enhanced. For example, when the main body case of the charger is a synthetic resin molded product and a hook hole for wall hanging is integrally provided on the back side of the charger case, in many cases, this hook hole is a main body case due to the relationship of the direction of removing the molding die. May be formed as a through hole. In this case, if this through-hole is not blocked by using a separate sealing material, dust and foreign matter are likely to enter the main body case through the hook holes on the back side, and rainwater and the like are liable to enter the main body case. There was a problem. In this respect, according to the charger according to claim 4, the wall-hanging portion provided with the hook hole is manufactured separately from the main body case, and is attached to the back side thereof by fixing means such as screwing. Therefore, it is not necessary to provide a hook hole as the through hole as described above, so that the waterproofness inside the main body case can be ensured without using the sealing material or the like separately.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the entire charger 10 according to the present embodiment. The battery pack 1 to be charged by the charger 10 is mounted on the tip (battery mounting portion) of the handle portion of a hand-held power tool, for example, and used as a power source. This embodiment has a feature in the wall-hanging structure of the charger 10, and the battery pack 1 and the electric tool charged by this are not particularly changed.
As shown in FIG. 2, the battery pack 1 includes a pair of slide rail portions 2 and 3 on the back surface thereof. Both the slide rail portions 2 and 3 are provided in parallel with each other along the upper and lower portions of the back surface of the battery pack 1. By sliding the battery pack 1 through the slide rail portions 2 and 3 with respect to the battery mounting portion of the electric power tool, the battery pack 1 is mounted and removed. On the back of the battery pack 1, female connection terminals 4 and 5 and a male connection connector 6 are provided. Both connection terminals 4 and 5 are accommodated in slits that open to the front in the mounting direction (right side in FIG. 2) and the rear rear (front side in FIG. 2). The connection terminal 4 is a minus terminal and the connection terminal 5 is a plus terminal. The connection connector 6 is provided in a state protruding between the connection terminals 4 and 5 forward in the mounting direction.
When the battery pack 1 is slid with respect to the battery mounting portion of the electric tool, the male terminal on the electric tool side enters the slit in which the both connection terminals 4 and 5 are accommodated, and becomes conductive. The connection connector portion 6 is inserted into the female connector on the electric tool side, and the control signal path is connected.

FIG. 1 shows a state where the charger of the present embodiment is hung on a wall W. Hereinafter, the up, down, left, and right directions are used with the user facing the front of the wall-mounted charger 10 as a reference.
The charger 10 of this embodiment includes a main body case 11 that forms a generally rectangular box. The main body case 11 has a configuration in which the back side opening of the case main body portion 12 is closed with a bottom plate portion 13. The case main body portion 12 and the bottom plate portion 13 are each manufactured by molding a synthetic resin, and are abutted with each other at the joint portion J and integrally coupled. A control board including a charging circuit is accommodated in the case body 12 or on the bottom plate 13.
As shown in FIG. 1, a battery mounting portion 20 is provided in front of the case main body portion 12. The battery mounting portion 20 is a portion to be mounted for charging the battery pack 1, and the battery pack 1 is mounted by sliding in the lateral direction (left-right direction) with respect to the battery mounting portion 20, and is removed on the contrary. . Guide rail portions 21 and 22 are provided above and below the battery mounting portion 20 in parallel to each other. Both guide rail portions 21 and 22 are formed in the left-right direction (lateral direction) and long in the direction in which the battery pack 1 is mounted and removed. The battery pack 1 is attached to the battery mounting portion 20 by sliding the guide rail portions 21 and 22 to the left side of the battery pack 1 with the slide rail portions 2 and 3 engaged. Conversely, the battery pack 1 can be removed from the battery mounting portion 20 by sliding it to the right.
The battery mounting part 20 is covered with a slide cover 24. The slide cover 24 is spring-biased toward the right closed position. When the slide cover is pushed to the left against the spring biasing force, the male connection terminals 25 and 26 and the female connection connector 27 are exposed. In FIG. 1, the upper connection terminal 25 is a minus terminal and the lower connection terminal 26 is a plus terminal, which is arranged corresponding to the connection terminals 4 and 5 on the battery pack 1 side. When the battery pack 1 is attached to the battery attachment portion 20, the connection terminal 25 is connected to the connection terminal 4 of the plus terminal, and the connection terminal 26 is connected to the connection terminal 5 of the minus terminal.
Further, the connection connector 27 has a box shape opened to the right in FIG. The male connector 6 on the battery pack 1 side is inserted into the connection connector 27 and connected. The slide cover 24 is pushed and opened by the battery pack 1 as the battery pack 1 is mounted. When the battery pack 1 is removed from the battery mounting portion 20, the slide cover 24 is closed by a spring biasing force.

As described above, the charger according to the present embodiment is characterized in that the battery pack 1 can be hung on the wall W in a direction in which the attaching / detaching direction is the left-right direction (lateral direction). As shown in FIGS. 2 and 3, on the back side of the charger 10, the outer surface of the bottom plate portion 13 (the surface facing the wall W) has leg portions 14 to 14 that are in contact with the wall W and the wall W. There are provided wall hanging portions 30, 30 to which the side hooks 40, 40 are hooked. As shown in FIG. 2, the leg portions 14 to 14 are provided at the four corners of the outer surface of the bottom plate portion 13.
The wall hanging portions 30 and 30 are provided at the upper and lower two positions in the center in the left-right direction of the bottom plate portion 13. Details of the wall hanging portion 30 are shown in FIGS. Both wall hanging portions 30 and 30 are mainly composed of an engaging plate 31 that is manufactured separately from the bottom plate portion 13. Both engagement plates 31 and 31 are rectangular plates that are long in the vertical direction, and a hook hole 32 is provided at the center thereof. The hook holes 32 and 32 are respectively formed in a substantially circular insertion hole portion 32a at the center, a hook-shaped hooking hole portion 32b extending upward from the upper portion of the insertion hole portion 32a, and a similar groove hole extending downward from the lower portion. It has a keyhole shape provided with a hooking hole portion 32c having a shape. The upper and lower hooking hole portions 32b and 32c are formed symmetrically with the same length and width.
Both engagement plates 31 and 31 are fitted in a rectangular recess 13 a provided in the bottom plate portion 13. A screw hole 13c is provided at one end of the bottom of the recess 13a, and an engaging boss 13b is provided at the other end. The engaging plate 31 fitted in the recess 13a is fixed by fixing one end of the engaging plate 31 with a fixing screw 33 fastened to the screw hole 13c and the other end of the engaging plate 31 by fitting the engaging boss 13b into the engaging hole 32d. It is attached to the bottom plate portion 13 in a fixed state. A gap 13d for the hook 40 on the wall W side to enter is provided between the engaging plate 31 thus fixed and the bottom of the recess 13a.

Two upper and lower hooks 40 are provided on the wall W side corresponding to the two upper and lower wall hanging portions 30. Both hooks 40, 40 are each provided with a flange portion 40a and a shaft portion 40b. The flange portion 40a has a diameter that can pass through the insertion hole portion 32a of the hook hole 32 but cannot pass through the hooking hole portions 32b and 32c. The shaft portion 40b has a diameter that can be inserted into the hooking hole portion 32c. The flange portions 40a of the hooks 40 are inserted into the gaps 13d through the insertion holes 32a in the upper and lower wall hanging portions 30 and 30, respectively, and then the charger 10 is displaced downward so that the hooks 40 and 40 The charger 10 can be hung on the wall W by relatively moving the shaft portions 40b and 40b into the upper hooking holes 32b and 32b and abutting against the upper ends thereof. .
In the charger 10 hung on the wall W in this way, the shaft portions 40b, 40b of the two hooks 40, 40 arranged at regular intervals vertically enter the hooking hole 32b, and the flange portion 40a. , 40a are positioned in the gap 13d, so that they can be hung without being displaced in the direction along the wall W and without being displaced in the direction away from the wall W. In this wall hanging state, the leg portions 14 to 14 are in contact with the wall W, so that the wall hanging state of the charger 10 is stabilized.
The upper and lower engagement plates 31, 31 can be removed from the recess 13a by loosening the fixing screws 33 to remove them from the screw holes 13c, and further extracting the bosses 13b from the engagement holes 32d. Since the engaging plate 31 having the hook hole 32 is manufactured separately from the bottom plate portion 13 as described above, the recess 13 a is formed without providing a hole penetrating inside the main body case 11. Also in this point, the wall hanging portions 30 and 30 in the main body case 11 of the charger 10 of the present embodiment are different from the conventional configuration.

Moreover, the charger 10 of this embodiment is not hung on the wall W, but can be installed, for example, on a work table as shown in FIG. In this case, the leg portions 14 to 14 function as original leg portions.
When the battery charger 10 of the present embodiment is installed horizontally on a workbench or the like, the case is such that the battery mounting portion 20 is inclined to the front side in FIG. A main body 12 is manufactured. For this reason, when the battery pack 10 is mounted on the battery mounting portion 20, the battery pack 10 can be slid with a small sliding operation force, thereby providing convenience when the battery pack is mounted.
Moreover, since the sliding direction at the time of mounting | wearing of the battery mounting part 20 inclines in the direction which falls to a mounting direction, a part of user's sliding operation force acts on the direction which presses charger 10 itself to a work table. According to this, since the battery pack 1 can be mounted on the battery mounting portion 20 with one hand while preventing the displacement of the charger 10, the user needs to hold the charger 10 with the other hand. In this respect, the handling of the charger 10 is improved.
Furthermore, since the sliding direction at the time of mounting the battery mounting unit 20 is inclined in the direction of lowering the mounting direction, the sliding operation when mounting the battery pack 1 even when the charger 10 is hung on the wall W. The force acts in the direction of pressing the charger 10 against the wall W. Also in this respect, the user can easily attach the battery pack 1 with one hand without causing rattling or displacement of the charger 10 hung on the wall W.

According to the battery charger 10 of the present embodiment configured as described above, when the battery is hooked on the wall W via the wall hanging portions 30 and 30 provided on the back side (wall hanging state), the battery mounting portion 20 on the front surface is provided. The battery pack 1 is attached to and removed from the battery pack 1 in the horizontal direction. That is, the charger 10 according to the present embodiment can be hung on the wall W in a direction in which the mounting / removing direction of the battery pack 1 with respect to the battery mounting portion 20 is a horizontal direction.
For this reason, the slide cover 24 covering the battery mounting portion 20 is opened sideways, whereby the entry of dust or the like into the slide cover 24 can be significantly suppressed. Since the entry of dust or the like into the slide cover 24 can be greatly suppressed, the adhesion of dust and foreign matter to the connection terminals 25 and 26 and the connection connector 27 can be suppressed, and as a result, the charger 10 malfunctions. Can be prevented and the life can be extended.
Further, as a result of the mounting and removal directions of the battery pack 10 with respect to the battery mounting portion 20 being the horizontal direction, the opening of the connection connector 27 is horizontal, so that in this respect also the intrusion of dust and foreign matter into the connection connector 27 Adhesion can be more reliably suppressed.
Furthermore, the attachment and detachment direction of the battery pack 1 with respect to the battery attachment part 20 is a lateral direction orthogonal or substantially orthogonal to the gravitational direction, and the charger 10 includes shaft portions 40b of the hooks 40 and 40 on the wall W side. Since each of the battery packs 40b is hung in a state of entering into the hooking groove 32b on the upper side of the hook hole 32, the battery pack 1 is hung in a strong state without rattling in the lateral direction (left-right direction). The battery mounting unit 20 can be quickly mounted and removed with one hand, and the usability (operability) of the charger 10 can be improved in this respect.

Moreover, according to the charger 10 of this embodiment, the hook holes 32b and 32c are provided vertically symmetrically from the upper and lower sides of the insertion hole portion 32a for the upper and lower hook holes 32 and 32, respectively. For this reason, the charger 10 can be turned upside down and hung on the wall W. FIG. 6 shows a state of being hung on the wall W in a direction that is vertically inverted from the wall-hanging posture shown in FIGS. 1 and 2. In the wall hanging posture shown in FIG. 6, the battery mounting portion 20 is positioned on the lower side. Further, the opening direction of the slide cover 24 is opposite to the state shown in FIG. For this reason, the mounting direction of the battery pack 1 with respect to the battery mounting part 20 is also opposite to the state shown in FIG. In the orientation shown in FIG. 6, the battery pack 1 can be attached to the battery attachment portion 20 by moving it to the right side.
In this way, the battery pack 1 can be mounted on and removed from the wall W by turning it upside down and the direction of attachment / detachment can be arbitrarily selected from the right side or the left side, so that good operability is always ensured regardless of the user's dominant arm. can do.
Further, even when the wall hanging posture is turned upside down, the mounting and removing directions of the battery pack 1 are lateral directions, so that the hooking state (wall hanging state) of the hooks 40 and 40 with respect to the wall hanging portions 30 and 30 is maintained. The battery pack 1 can be attached and removed with one hand, and the slide cover 24 is not opened upward with the opening / closing direction of the slide cover 24 being lateral, so that dust and foreign matter adhere to the connection terminals 25, 26 and the connection connector 27. It is suppressed.

Further, according to the charger 10 of the present embodiment, the hook holes are not directly provided in the bottom plate portion 31 of the main body case 11 as the wall hanging portions 30, 30, but the engagement plates 31, 31 each having the hook holes 32 are provided. Since the base case 13 is manufactured separately from the bottom plate portion 13 of the main body case 11 and is attached with the fixing screws 33, the bottom plate portion 13 penetrates the bottom plate portion 13 in the die cutting direction when the bottom plate portion 13 is molded. There is no need to set holes. For this reason, according to the charger 10 of this embodiment, the waterproofness of the main body case 11 is improved, and the protection of the board and the like attached to the inside is prevented for a long period of time by preventing the entry of foreign matters such as dust. It is like that.
In addition, since the charger 10 of the present embodiment can be turned upside down and hung on the wall W, the attachment / detachment direction of the battery pack 1 with respect to the battery attachment portion 20 can be arbitrarily selected from the right side or the left side. Therefore, when there is not enough space for attachment and removal on one side in a state of being hung on the wall W, the battery pack 1 can be turned upside down and hung on the wall W by using the other space. Can be easily installed and removed.
Furthermore, since the sliding direction when the battery pack 1 is mounted on the battery mounting unit 20 is inclined in a direction that falls in the mounting direction, a part of the sliding operation force presses the charger 10 against the wall W or the work table. Thus, the battery pack 1 can be easily mounted with one hand while preventing the position shift or rattling of the charger 10 when the battery pack is mounted.

Next, in the stage where the bottom plate portion 13 is manufactured by molding by attaching the engaging plates 31 and 31 as separate parts to the bottom surface of the main body case 11 and providing the engaging plates 31 and 31 with the hook holes 32 respectively. It is not necessary to form a hook hole for hanging on the wall at the same time. In general, when a case body is manufactured by integral molding of resin, and this type of hook hole is provided integrally on the bottom surface of the case body while securing a gap for hooking the hook in the back. In some cases, it is necessary to set a hole penetrating the case body depending on the direction in which the mold is removed. When such a through hole is set, rainwater or the like easily enters from the outside of the case body or dust or dust easily enters unless the through hole is closed with a sealing material. There is a risk that various members such as a substrate incorporated in the board may be damaged.
In this regard, according to the wall hanging portions 30 and 30 of the charger 10 according to the present embodiment, the rectangular recess 13a that does not need to be provided with a through hole for punching as in the related art is integrally formed in the bottom plate portion 13. The hook plate 32 can be provided in the bottom plate part 13 while securing the gap 13d by manufacturing the engaging plate 31 having the hook hole as a separate member and attaching it as a lid for closing the opening of the recess 13a. According to this configuration, since rainwater, dust or the like does not enter the inside of the main body case 11 through the recess 13a, damage to the internal substrate or the like can be prevented in advance, and as a result, the durability of the charger 10 can be improved. The product life can be extended by improving the properties.
The above configuration can be specified as follows. A wall-hanging structure of the case body, in which a recess is provided at the bottom, the opening of the recess is closed with a flat engagement plate prepared as a separate member, a hook hole is provided in the engagement plate, and the hook hole is passed through the hook hole. A hook hole structure of a wall-hanging case body configured such that the case body can be wall-mounted by hooking the hook.
Such a configuration is not limited to the battery charger 10 of the exemplified electric tool, and can be widely applied to other wall-mounted devices such as wall clocks and mainly manufactured by integral molding of resin.

Various modifications can be made to the embodiment described above. For example, although the upper and lower wall hanging portions 30 and 30 are illustrated, the upper one may be used. Even when the wall hanging portion 30 is provided at one place, the mounting and removing directions of the battery pack 1 are lateral directions, so that the dustproof performance of the connecting terminal portions 25 and 26 and the connecting connector portion 27 can be ensured. In addition, the battery pack 1 can be easily attached with one hand while preventing the battery 10 from being displaced.
Furthermore, although the hook hole 32 has been illustrated as a structure in which the hook holes 32b and 32c are provided on both the upper and lower sides from the insertion hole 32a, the wall can be hung upside down, but one hooking groove may be omitted. .
Further, the hook 40 having the flange portion 40a at the tip is illustrated, but by using the hook bent in an L shape upward, the insertion hole portion 32a of the hook hole 32 is omitted, and the hook hole portion that is simply long in the vertical direction is used. You may comprise a hook hole only.
Further, in the illustrated embodiment, the battery mounting 20 is illustrated with a configuration that is inclined in a direction downward in the mounting direction of the battery pack 1, but the inclined structure is omitted and the mounting direction of the battery pack 1 is parallel to the bottom surface portion 13. It is good also as composition which is.
Further, the configuration in which the hook holes 32 and 32 are provided on the charger 10 side and the hooks 40 and 40 are provided on the wall W side is illustrated, but conversely, the hook is provided on the charger 10 side and the wall W side is provided. A hook hole may be provided so that the charger can be hung on the wall.

It is a figure which shows embodiment of this invention, and is a perspective view of the charger of a wall hanging state, and the battery pack charged by this. This figure has shown the state which looked at the charger and the battery pack from the diagonally left front as seen from the user. Moreover, in this figure, the state which removed the battery pack from the battery mounting part is shown. It is the perspective view which looked at the charger and battery pack of a wall hanging state from the back side (arrow (2) direction of FIG. 1). It is a rear view (bottom view) of the charger according to the present embodiment. It is a perspective view of a wall hanging part. FIG. 5 is a cross-sectional view taken along line (5)-(5) in FIG. 4 and is a vertical cross-sectional view of a wall hanging portion. It is a perspective view of the charger turned upside down and hung on the wall. Comparing this figure with FIG. 1, the position of the battery pack is opposite to the left and right side, the battery mounting position of the charger is upside down, and the mounting and detaching directions are right and left opposite. It is a perspective view which shows the state which installed the charger which concerns on this embodiment not on a wall but on the work table, for example horizontally.

Explanation of symbols

W ... Wall 1 ... Battery pack 2, 3 ... Slide rail part 10 ... Charger 11 ... Main body case 12 ... Case main body part 13 ... Bottom plate part 13a ... Recessed part, 13b ... Engagement boss part, 13c ... Screw hole, 13d ... Gap 14 ... Leg part 20 ... Battery mounting part 21, 22 ... Guide rail part 24 ... Slide cover 25, 26 ... Connection terminal 27 ... Connection connector 30 ... Wall hanging part 31 ... Engaging plate 32 ... Hook hole 32a ... Insertion hole part, 32b, 32c ... Hooking hole portion, 32d ... engagement hole 33 ... fixing screw 40 ... hook, 40a ... flange portion, 40b ... shaft portion

Claims (4)

A battery charger for removing a battery pack of a power tool from a tool body and charging the battery pack, having a battery connection portion for connecting the battery pack on the front surface, and a wall hanging portion for wall hanging on the back surface, The battery charger in which the attachment / detachment direction of the battery pack to / from the battery connection portion is a direction along the wall and a lateral direction in a state of being hung on a wall via a wall hanging portion. The charger according to claim 1, wherein the wall hanging portion has a hook hole for engaging a hook provided on the wall, and the hook hole advances and retracts the hook in a direction perpendicular to the wall. A possible insertion hole and an upper part from the upper part of the insertion hole, and extending in a direction perpendicular to the direction in which the battery connector is attached to and detached from the connection connector, and the hook is perpendicular to the wall surface A charger provided with a hooking hole portion that is engaged with the battery so as not to be detached. The charger according to claim 2, wherein the wall hanging portion has a hooking hole portion extending downward from a lower portion of the insertion hole portion in addition to a hooking hole portion extending upward from the upper portion of the insertion hole portion. A symmetrical charger. 4. The charger according to claim 2, wherein the wall hanging portion is prepared separately and attached to the rear surface. 5.

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