Abstract: A battery connector comprises an insulative housing comprising mounting surface and a top surface opposite to the mounting surface. A receiving chamber is defined in the housing from the top surface with first and second conductive terminals spatially arranged within the chamber. The chamber features at least a rounded corner for conforming to a rounded edge of a battery to be inserted so as to prevent the battery from being inserted incorrectly. The rounded corner has a curve surface tangent to two inner side walls of the chamber.

Abstract: A battery cover mechanism used in a portable electronic device includes a housing defining a receiving groove therein for receiving a battery, an elastic member mounted on the housing and a cover corresponding to the housing. The elastic member is releasably held by the cover such that the cover can be mounted on the housing for covering the receiving groove, and the cover can be detached from the housing when the elastic member is released from the cover.

Abstract: A battery cover assembly (100) for use in a portable electronic device, comprises a main body (30), a battery cover (10), and a elastic member (20). The battery cover (10) includes a plurality of latching portions (122). The elastic member (20) is mounted in the main body (30), and includes a body section (24) and a resisting section (28) extending from the body section (24). The latching portions (122) engages through openings in the body section (24) and are elastically resisted by the resisting portion (28) to releasably latch the battery cover (10) to the main body (30). When detaching the battery cover (10) from the main body (30), the resisting section (28 is elastically biased by the latching portions (122) to accumulate elastic force, the latching portions (122) is pushed away from the body section (24) under the elastic force of the resisting section (28).

Abstract: A battery cover mechanism used in a portable electronic device includes a housing, a cover and an operating member. The housing defines a receiving groove therein for receiving a battery. The cover corresponds to the housing and is movably mounted on the housing. The operating member is movably mounted on the housing. The operating member is held on the housing to hold the cover such that the cover is closed to cover the receiving groove, and the operating member is moved to drive the cover to move such that the cover is opened.

Abstract: A battery pack having a battery in which a battery case and a cap of a sealing plate sealing an open end of the battery case serve as connection electrodes of opposite polarities, a terminal unit including external connection terminals respectively connected to these connection electrodes and an insulating cover integrally formed therewith, the terminal unit covering at least one end of the battery case, and a resilient member interposed between one end of the battery case and the terminal unit in a compressed state. In the manufacturing method of this battery pack, the dimension between the terminal unit and the other end of the battery case is controlled when fixing the terminal unit with the battery case. The battery pack thus has a simple and low cost configuration and yet exhibits high reliability in terms of the connection state of the external connection terminals when set in a portable electronic device.

Abstract: A battery box includes a housing, a positive electrode member, and a negative electrode member. The housing includes a receiving space in a side thereof for receiving at least one battery therein. The receiving space defines two slots at opposite ends thereof. The positive electrode member is mounted to the housing and includes two positive electrode terminals each located at a corresponding one of the slots of the housing, respectively. The negative electrode member is mounted to the housing and includes two negative electrode terminals extending into the receiving space of the housing and each at a side of a corresponding slot of the housing.

Abstract: Disclosed are a safety element for a battery, which is provided with material having a Metal-Insulator Transition (MIT) characteristic where resistance abruptly drops at or above a certain temperature, and a battery with such a safety element. This battery with an MIT safety element is turned into a stable discharged state when it is exposed to an elevated temperature or a battery temperature rises due to external impact, so that it can ensure its safety.

Abstract: A battery cover latching assembly (30) is used in a portable electronic device (9). The portable electronic device has a housing (10) and a battery cover (20). The battery cover has a flange (242) extending from one end portion thereof. The housing defines a receiving cavity (18) in one end portion thereof. The battery cover latching assembly includes a button (40) and a wedging block (52). The button has a first wedging surface (4462) formed at one end thereof. The wedging block has a second wedging surface (522) formed at a first end thereof. The button and the wedging block are elastically mounted in the receiving cavity. The first wedging surface mates with the second wedging surface. The flange is releasably mounted with the wedging block.

Abstract: A battery pack detachably connectable to an equipment body to supply power to the equipment body, the battery pack including a battery cell, a microcomputer for communicating with the equipment body, a connection terminal connected to the microcomputer, a positive power supply input terminal connected to a cathode of the battery cell; and a negative power supply input terminal connected to an anode of the battery cell. After the power of the equipment body is turned on, the microcomputer alternately sends to the equipment body by serial communication via the connection terminal information to be used in authentication processing executed by the equipment body and information to be used in a battery residual quantity count executed by the equipment body. After the authentication processing is complete, the microcomputer sends to the equipment body information to be used in updating the battery residual quantity count executed by the equipment body.

Abstract: A beam member is fixed to a side member of a vehicle body. The side member is provided with a nut member and a reinforcing member. A bolt is inserted into the nut member from under the side member. The reinforcing member includes first and second plate portions. The first plate portion includes a pair of flanges that are bent individually at bent portions. The respective positions of the bent portions are adjusted depending on a distance between sidewalls of the side member. The flanges are welded to the sidewalls. The second plate portion includes a base portion welded to the lower end of the nut member and an upright portion extending along the nut member.

Abstract: A frame device for supporting objects such as batteries during seismic stress, comprising a pair of end frame members mounted in upstanding spaced apart relation by a plurality of vertically spaced elongated channel support members secured at opposite terminal ends to the vertical columns of the end frame members, shelves for supporting batteries spanning the channel support members and defining a plurality of compartments for the batteries, each end frame member being formed of a single sheet material shaped to define vertical columns and a web extending between the end columns, a pair of anchors, means for securing the end frames to the anchors, and means defining a plurality of openings in the web of each end frame generally aligned with the compartments formed by the shelves to provide horizontal ventilation of batteries mounted in the compartments.

Abstract: A power storing container replacement and charging method and system which allows continuous/uninterrupted power enables a user to continuously use a device without the device being relegated to a wired device for an extended period of time. The method and system includes an apparatus which is able to retain a power storing container for charging, and then receive a device with another power storing container which is replaced with the charged power storing container contained in the apparatus. The system reduces the wait time for a power storing container to charge and encourages use of the device without fear of the draining all the power from the device being unable to use the device for even a short period of time. The system also allows the power storing container in the device to be replaced without the device losing power and without involving any complicated steps from the user.

Abstract: A battery mounting mechanism includes a terminal connector, a first stopper, a second stopper, and a release button. The first stopper is disposed movably in the Z axis direction with respect to the terminal connector. The second stopper is disposed on the opposite side of the terminal connector with respect to the first stopper, and is disposed movably in the Z axis direction with respect to the terminal connector. The release button is arranged to release the restriction of the first battery or the restriction of the second battery by the first stopper, and arranged to drive the first stopper and the second stopper in the Z axis direction with respect to the terminal connector.

Abstract: A latching assembly for a removable battery package to an electrically powered cleaning device is provided along with the electrically powered cleaning device and the electrical combination with the battery charger. The latching assembly on the battery package comprises at least one moveable first engagement member, in movable cooperation with at least one rod which is in movable cooperation with a user contact. The first engagement member secures the removable battery package with another engagement member associated at least with the cleaning device. The first engagement member is located toward a side of a long end of the battery package opposite the end with the user contact Moving the user contact moves the member through the rod between an engaged position to thereby secure the battery package to the cleaning device and an unengaged position for removal of the battery package from the cleaning device.

Abstract: A battery tube storage system (10) includes a first container (12) having a first light transmitting, rigid shell (14) including a first color, such as green, that defines a plurality of tubes (16A, 16B, 16C, 16D) dimensioned to receive and secure cylindrical shaped batteries (24). A first latch-lock (26) secures a top (22) to an entry-end (20) of the first shell (14). A similar second shell (32) is made of or includes a second color that is distinct from the first color, such as red. The first shell (14) can be detachably secured to the second shell (32) so that the battery storage system (10) may be used to carry varying numbers of batteries (24) depending upon the needs of a user, and by the distinct colors, a user can quickly distinguish between used and unused batteries (24).

Abstract: A pronounced heat-diffusing action for a battery pack, which has a plurality of battery cells (2) located in a housing (1), is created by shaping the wall of the housing (1) surrounding the battery cells (2) such that this wall forms at least one duct (3, 4) for a heat-diffusing medium, which duct is closed off from the interior of the housing (1).

Abstract: A battery cover latch mechanism (100) used in portable electronic device (200) is described including a cover member (10) and a latch member (20). The cover member defines a fitting cavity (128). The cover member is fitted and slidable within the cavity. The cover member includes a deformable loop structure and a latch portion (26). The loop structure includes a resilient biasing portion (24). The loop structure is deformed and the biasing portion is biased so that the latch member is fitted within the cavity when in a latched position. The loop structure can be further deformed and the biasing portion further biased so that the latch member slides within the fitting cavity and the latch portion is transferred from the latched position to a released position.

Abstract: A battery pack includes: a plastic-made, elongated outer casing composed of interconnected peripheral walls to define a battery storage portion inside; and a battery accommodated in the battery storage portion inside the outer casing. The outer casing has a mounting protrusion to be attached to and projecting outwardly from electronic equipment casing and incorporates an inner casing inside the outer casing located at the mounting protrusion. The battery pack is so constructed and arranged that an outer battery located outside electronic equipment is accommodated inside the inner casing.

Abstract: A portable electronic device (100) includes a main body (10), a cover (20), and a battery (30). The cover has at least one claw (252), and the cover is mounted to the main body by the at least one claw. The battery has at least one protrusion (35). Each protrusion is configured for engaging with a corresponding claw in such a manner that when the battery is positioned in a “tool” mode (i.e., as opposed to a “use”/battery-power mode) is pressed towards the cover, a given protrusion pushes a respective claw away from the main body to allow the cover to be separated from the main body.

Abstract: A module for a battery system supporting batteries during seismic stress comprising a pair of side panels, each panel formed of material such as steel shaped to define a generally rectangular face and top and bottom flanges extending generally perpendicularly to the face along top and bottom edges thereof and side flanges formed integrally with the face and top and bottom flanges, a base plate having means for mounting the module to a support surface having a generally U-shaped channel formed integrally along the front and rear edges of the base plate, a rear panel extending between and nested in the side panels and secured thereto and the base plate, at least one pair of front and rear support channels extending between the side panels, a shelf for batteries supported on the base plate and support channels, a support channel extending vertically between the top and bottom flanges, and means for securing modules stacked one on top of another along the top and bottom flanges.

Abstract: A battery pack is provided for a mobile communication device, comprising a casing defining a cavity that conforms, at least partially, to the outer shape of the mobile communication device and one or more rechargeable power cells housed within the thickness of the casing. An internal interface engages a corresponding interface on the mobile communication device to provide power from the one or more rechargeable cells to the mobile communication device. An external interface is electrically coupled to the internal interface in order to transmit signals from the mobile communication device to an external device and may further serve to recharge the one or more rechargeable power cells. The battery pack may also serve as an extendible platform by providing additional integrated communication interfaces and/or processors that can be utilized by the mobile communication device to extend its communication and/or processing capabilities.

Abstract: A package containing a roll of a long electrode plate which is a package for storing a roll of a long electrode plate, making it is possible to simplify the work process of containing and packaging the roll of a long electrode plate and prevent the electrode performance from deterioration without the electrode plate to absorb moisture, be damaged or the like, and the collection of packaging material constituting the package is not necessary since the packaging material is disposable after opening of the package.

Abstract: A handheld electronic device including a body, a cover, an engaging assembly, and a releasing member is provided. The cover is disposed on the body and has a hole. The engaging assembly is movably disposed between the body and the cover to engage the cover on the body. The releasing member is disposed on the body and exposed by the hole of the cover. The releasing member is suitable for leaning against the engaging assembly and driving the same from an engaging position to a releasing position so as to release the cover.

Abstract: A battery housing unit with a releasable cover for minimizing mis-alignment of a battery housed therein during high impact loads. The battery unit includes a battery holder having retention members biased towards one another that receive a battery. The retention members engage stop ribs projecting from the cover. The cover fits over the retention members of the battery holder and to a base of the housing unit. The retention members and stop ribs are engaged when high impact loads are delivered to the housing unit and the battery is urged against the biasing nature of the retention members. Movement and mis-alignment of the battery is thus minimized and high impact loads are re-distributed throughout the cover. Detents may be provided on each retention member for engaging a corresponding cavity provided on each stop rib. The detents and cavities interlock the retention members and stop ribs together upon high impact. In this manner, movement and mis-alignment of the battery is also minimized.

Abstract: An electronic apparatus has a battery pack, a housing and a keyboard. The housing has a container portion in which the battery pack is removably loaded and elastic pieces positioned above the battery pack loaded in the container portion. The keyboard is mounted on the elastic pieces.

Abstract: An electronic apparatus has a battery pack and a main unit. The battery pack has a groove formed in an outer surface of the battery pack, the groove being recessed from the outer surface and extending in a predetermined direction. The main unit comprises a container portion containing the battery pack in a removable manner and having a projection engaged to the groove of the battery pack loaded in the container portion, and a cable disposed in an internal space of the projection.

Abstract: A battery cover assembly (100) includes a battery cover (30), a resilient member (20), and a locking member (40). The battery cover has a latching member configured for engaging with the fastener mechanism of a housing (10), and an insertion hole (322) configured for the insertion of a latching post (120) of the housing. The resilient member is mounted on the battery cover, and has a first latching end (202) and a second latching end (204). The first latching end is secured on the battery cover. The locking member is rotatably attached on the battery cover and configured for resisting the latching post when the battery cover is in the closed position thereby preventing movement of the battery cover toward the opened position. The second latching end of the resilient member is fixed on the locking member.

Abstract: The invention includes a storage rack for storing an array of battery cells in an uninterrupted power source (UPS). The rack at least meets the seismic testing requirements of NEBS GR-63-CORE (Issue 2 Apr. 2002). The rack includes a base module having pair of spaced end supports. Each end support includes opposed vertical frame members, opposed horizontal frame members, and a plate extending substantially continuously therebetween. At least one rail and a plurality of shelves extend between the end supports. The rail and shelves are welded to the end supports. The rack further includes at least one stack module configured to be stacked atop the base module and removably connected to the base module.

Abstract: A multi-cell battery in which a plurality of electrochemical cells are disposed in a battery case. The battery case includes one or more partitions which divide the interior of the case into a plurality of cell compartments that house the electrochemical cells. The battery case includes at least one gas channel have a tortuous pathway designed to trap electrolyte which may escape from the cell compartments. A unique battery terminal may be molded into the battery case.

Abstract: Water-tight battery powered appliances, for example personal care appliances such as razors and toothbrushes, are provided. The appliances include a housing having a seal that allows gases, e.g., hydrogen, to vent from the appliance without allowing water to enter.

Abstract: The present invention provides a battery pack which is capable of enhancing a short-circuit prevention effect, and electronic equipment using this battery pack. The battery pack 31 has a battery built in the case 32 and an output terminal 47 which is electrically connected to the battery and provided in such a manner as directed towards the outside of the case 32. The battery pack 31 has an output section 34 that is provided in orthogonal to a virtual plane including a mount reference plane for the electronic equipment (under surface 33B) of the case 32, with a space between the virtual plane and the output section 34. The output section 34 is provided with an output terminal 47.

Abstract: A locking apparatus for a battery (10) having locking portions (11) includes a base (20), a resilient member (85) secured to the base, and a first lock member (40). The resilient member includes a stop portion (86). The first lock member defines a first recess (43) and a second recess (42), and includes at least one post (51). The at least one post is engaged in the locking portions of the battery. The first lock member is slidable between a first position and a second position. When the first lock member is slid to the first position, the stop potion of the resilient member abuts the first lock member in the first recess to secure the battery to the base. When the first lock member is slid to the second position, the stop potion abuts the first lock member in the second recess to release the battery from the base.

Abstract: A portable electronic device (100) includes a main body (10), two connecters (20), and a battery (30). The main body includes a battery receiving portion (13) defined therein. The two connecters are mounted to the main body, and are diagonally disposed across the battery receiving portion. The battery is detachably received in the battery receiving portion, and includes a main portion (31), two contact portions (33), and a pair of position poles (35). The main portion has two opposite sidewalls and two opposite side surfaces. The two contact portions are respectively diagonally formed on the sidewalls of the main portion, and can be respectively electrically connect with a corresponding connecter. The pair of position poles respectively extend outwardly from a corresponding side surface. The battery is rotatable around the position poles, relative to the main body.

Abstract: A liquid absorbing sheet has a liquid-absorbing resin layer that can effectively absorb the nonaqueous electrolyte solution used in nonaqueous electrolyte secondary cells that make nonaqueous electrolyte battery packs (in particular, lithium ion-based nonaqueous secondary battery packs). The liquid-absorbing resin layer is obtained by irradiating a particular monomer composition with UV rays or other energy rays to polymerize the monomer composition. The monomer composition contains a monofunctional monomer component (A) having a polyethylene glycol acrylate monomer and an amide bond-containing acrylic monomer; and a polyfunctional monomer component (B).

Abstract: An electronic equipment, comprising: a battery receiving chamber for receiving a battery, a battery lid arranged to be rotatable to open and close an opening portion of the battery receiving chamber, a locking member arranged to engage with the battery receiving chamber to lock the battery lid so that the opening portion of the battery receiving chamber is closed, a contact terminal connectable to a terminal of the battery received in the battery receiving chamber, the contact terminal being arranged to be build in the battery lid movably in a thickness direction of the battery lid, wherein the contact terminal is arranged to protrude into the inside of the battery lid in accordance with the locking member engaging with the battery receiving chamber with the battery lid is closed and the contact terminal is retracted into the battery lid in accordance with the locking member being released from engagement with the battery receiving chamber.

Abstract: Battery packs are retained by frames which are comprised of plastic beams and aluminum corner connectors that peripherally surround the battery packs. The plastic beams are tensioned by tensioning bolts which pass through the aluminum corner connectors and thread into threaded pin inserts laterally seated in the beams. As the tensioning bolts are advanced into the inserts the beams are axially tensioned. Damping pads are disposed between the separate battery modules of the battery packs, as well as at the corners of the frames, to both absorb vibrational and spike impacts. The damping pads frictionally engage the outer surfaces of the battery cases so that the batteries will not move in the Z-axis direction.

Abstract: A flexible tongue having guide tabs is used in a battery capturing mechanism to engage alignment grooves formed in a battery cartridge. The guide tabs form hooks so that when the battery has been inserted, thereby causing the tongues to deflect at a flexible hinge as the battery slides into the capturing mechanism, the hooks retain the battery. Preferably tapered guide rails are aligned with the tabs and are formed on a rigid floor to which the tongue's flexible hinge attaches, thereby guiding a connector of the battery into electrical engagement with a corresponding connector that is part of the device into which the battery capturing mechanism is used. To remove the battery, the tongue may be depressed and battery grips grasped to retrieve the battery from the mechanism.

Abstract: A method and apparatus for enabling the use of a non-sterile battery with a sterile surgical instrument. The sterile transfer container has a tubular body with a closed distal end and an open proximal end. The container is provided with a cover and a locking mechanism for locking the cover to the body. The container is adapted to be attached to a surgical instrument in such a way that the latch assembly is prevented from opening until the container is removed from the instrument.

Abstract: A battery cover assembly includes a housing (1), a connecting member (20), a cover (3), a latching section (6), a compression spring (7), a gearing member (8), and a button (9). The housing has a sliding track (112) and a through hole (110) defined therein. The cover is rotatably engaged with the housing via the connecting member. The cover includes a claw (32) and a button hole (36). The latching section is slidably engaged with the housing. The latching section includes a stand arm (642) and a claw hole (622). The compression spring connects both with the housing and the latching section. The gearing member is mounted to the housing, and comprises a gear (81) and a rack (83) engaged with the gear. The rack defines a locking hole (830) engaging with the stand arm. The button engages with the gear and extends through the button hole.

Abstract: A battery cover assembly includes a battery cover (3) defining a pair of guide rails (326) therein, a connecting member (2), a housing (1) defining a receiving slot (164) and at least a battery-receiving compartment (194), a plurality of springs (5), and an antenna rod (4). The connecting member is slidingly received in the guide rails along a lateral direction, and the antenna rod inserts into the receiving slot through the connecting member and the springs such that the battery cover can rotate about the antenna rod. When the battery cover is rotated downwardly to the housing, a force is required to press the battery cover down upon the housing, and then inwardly along a direction toward the antenna rod until locking projections (302) on the cover catch in troughs (182) defined in the housing.

Abstract: A battery cover assembly includes a battery cover (3) defining guiding slots (326) therein, a connecting member (2), a housing (1) defining a battery-receiving compartment (194), a plurality of springs (5), and a rod (4). The housing includes a left sidewall (16), a partion wall (19), a first step (161) and a second step (163) connecting against the left sidewall, defining a receiving recess (167). The connecting member is slidingly received in the guiding slots along a lateral direction. The rod inserts through the connecting member, the springs, and secured in the receiving recess such that the battery cover can rotate about the rod. When the battery cover is rotated downwardly to the housing, a force is required to press the battery cover down upon the housing, and then inwardly along a direction toward the rod until locking projections (302) on the cover catch in troughs (182) defined in the housing.

Abstract: Disclosed herein is a medium- or large-sized battery pack having a plurality of unit cells. The battery pack includes a safety device (fire-extinguishing safety device) for spraying a material to prevent or restrain the fire or the explosion of the battery pack when the temperature of the battery pack exceeds the critical temperature level threatening the safety of the battery pack. The fire-extinguishing safety device according to the present invention has the effect of securing the safety of the battery pack when the temperature or the voltage is abruptly increased entirely or partially in the battery pack due to various causes, such as a breakdown of a safety system, and it is not possible to control the battery pack only by an operation control system.

Abstract: Disclosed is a battery pack locking device for a portable wireless terminal which is configured to utilize a locking method in which support protrusions formed at one end of a battery pack are engaged with support grooves formed at the terminal body of the portable wireless terminal, and the battery pack is then brought into close contact with the seat surface of the terminal body, while using a button member adapted to perform a depressing operation, thereby achieving an easy separation of the battery pack from the portable wireless terminal. In accordance with the configuration, it is possible to prevent the fingernail of the user from being damaged during the attachment or detachment procedure of the battery pack. In particular, it is unnecessary to provide an additional space for allowing a horizontal movement of the locking device. Accordingly, there is an increased flexibility in the design of the terminal appearance.

Abstract: A clamshell type electronic device includes: a first case; a second case; a hinge portion that rotatably couples the first case and the second case to be foldable; a battery chamber that is provided in the hinge portion for accommodating a battery; a battery cover that covers the battery chamber; and a stylus holder that is provided on an inner face of the battery cover for accommodating a stylus to be removable therefrom by drawing out the stylus from the stylus holder.

Abstract: A spacer for production of a battery pack using cylindrical batteries as unit cells, wherein the spacer is constructed in the form of a rectangular frame, the spacer is provided at opposite side surfaces (opposite faces) of the rectangular frame with a plurality of battery receiving parts having a circumference-type inner surface structure that partially covers the outer surfaces of the cylindrical batteries, each battery receiving part has a horizontal through-hole, which extends between the opposite side surfaces of the frame, and a pair of battery receiving parts (a unit receiving part) formed at the opposite side surfaces of the frame is connected with another adjacent unit receiving part via structures that can be easily cut.

Abstract: An electronic appliance includes a battery mounting portion on which two types of batteries are selectively mounted, wherein the battery mounting portion has: a battery mounting recessed portion; an appliance side connecting terminal; an urging member; and a single manipulating member; while a battery side connecting terminal of one battery is being attached to one appliance side connecting terminal, one engaging member is engaged with the one battery to prevent the one battery from moving in a direction of detaching the battery side connecting terminal from the one appliance side connecting terminal; and while a battery side connecting terminal of the other battery is being attached to the other appliance side connecting terminal, the other engaging member is engaged with the other battery to prevent the other battery from moving in a direction of detaching the battery side connecting terminal from the other appliance side connecting terminal.

Abstract: A lid of a battery case is supported on a shaft fixed on a battery box. The lid comprises a cover portion and a support arm for attaching the cover portion to the shaft. A hook formed on the cover portion engages with a hook receiver provided on the battery box, so as to retain the lid in a closed position. The hook is disengaged by sliding the lid from the closed position along the axial direction of the shaft, and the lid is subsequently rotated about the shaft to an open position. During rotation of the lid, a stopper abuts a side surface of the support arm to prevent sliding movement of the lid. When the lid is being rotated to be closed, the abutting stopper prevents jamming of the hook on top of the hook receiver.

Abstract: A housing is disclosed which may be used for a tachograph. The housing includes a battery holder and at least one fastening element arranged to fasten the battery holder to the housing. With the housing it is possible to mount a battery in an exchangeable manner while preventing the possibility of manipulating the components inside the housing during a changing of the battery. When the battery holder is mounted on the housing, the fastening element can only be accessed from the inside of the housing.

Abstract: A low-profile power supply terminal assembly is provided.

Abstract: A battery cover assembly mechanism (200) of a portable electronic device (100) includes a housing (10), a battery cover (20), and an elastic member (30) mounted on the housing. The housing has at least one latching portion (126). The battery cover includes at least one latching block (28), a first stopper (24), and a second stopper (26). The elastic member includes a first elastic portion (34) and a second elastic portion (36). In assembly, the latching block of the battery cover is engaged with the latching portion of the housing, and the first stopper and the second stopper respectively engage with the first elastic portion and the second elastic portion. Therefore, the battery cover is stably attached to the housing.