Abstract: The present disclosure discloses a method for recycling all types of lithium batteries. First, the lithium battery waste is acid-leached to obtain a solution containing most of metal ions. After filtering, the solution is separated from the remaining solids, and then the obtained solution is subjected to separate precipitation many times. After separately adjusting the pH value of the solution many times, adding precipitants with a high selectivity ratio, and matching with filtration and separation reaction, all ions in the lithium battery waste are sequentially precipitated in forms of iron phosphate (FePO4), aluminum hydroxide (Al(OH)3), manganese oxide (MnO2), dicobalt trioxide (cobalt oxide, Co2O3), nickel hydroxide (Ni(OH)2), and lithium carbonate (Li2CO3).

Abstract: A motor drive system includes a rectifier circuit, a controller, a modulator circuit and a direct current (DC) motor. The rectifier circuit is configured to convert an alternating current (AC) voltage to a DC voltage. The controller is configured to output a control signal. The modulator circuit includes a pulse generation module, a feedback determination module, a pulse modulation module and a driving module, and is configured to generate a modulated DC driving signal based on the DC voltage and the control signal generated by the rectifier circuit and the controller. The DC motor is configured to operate in accordance with the modulated DC driving signal generated by the modulator circuit.

Abstract: A swing device includes a supporting frame, a seat unit pivoted to the supporting frame so as to be turnable relative to the supporting frame, and a driving unit mounted on the supporting frame and including a housing secured to the supporting frame, an axle disposed rotatably in and extending out of the housing and coaxially secured to the seat unit, and a swingable member disposed in the housing, coaxially secured to the axle, and swingable between first and second positions so as to permit synchronous swinging of the seat unit via the axle. A driving member is mounted securely in the housing and is connected to the swingable member in such a manner that actuation of the driving member results in synchronous swinging action of the swingable member and the seat unit when the swing device is operated in an automatic mode and that manual pushing of the seat unit results in synchronous swinging of the swingable member when the swing device is operated in a manual mode.

Abstract: A playpen includes a looped upper frame disposed above and spaced apart from a looped lower frame in a vertical direction. A plurality of vertical post units bridge the upper and lower frames. A cot has a bottom wall and a surrounding wall that is connected to a periphery of the bottom wall and that extends upwardly from the bottom wall. The surrounding wall has a length in the vertical direction which is shorter than a distance between the upper and lower frames in the vertical direction. The surrounding wall further has a distal top portion formed with a plurality of outwardly folded sections that engage removably the upper frame for suspending the cot thereon such that the bottom wall is disposed above the lower frame.

Abstract: A multi-seat stroller includes a stroller frame having a front wheel-carrying portion, a rear wheel-carrying portion spaced apart from the front wheel-carrying portion in a longitudinal direction and mounted with a rear footrest member, and a seat-mounting portion extending in the longitudinal direction between the front and rear wheel-carrying portions. Each of a non-detachable seat member and a detachable seat member has a backrest portion and a horizontal seat portion provided with a retaining unit for mounting pivotally the backrest portion on the seat portion such that the backrest portion can be selectively disposed in one of a folded state, where the backrest portion overlies the seat portion, and an extended state, where the backrest portion extends vertically from the seat portion.

Abstract: A playpen includes a looped lower frame, a looped upper frame, a plurality of couplers, and a plurality of posts. The lower looped frame includes a plurality of interconnected lower frame sections having adjoining ends. The looped upper frame is disposed above the looped lower frame, and includes a plurality of interconnected upper frame sections having adjoining ends. The couplers interconnect the adjoining ends of the upper and lower frame sections. Each of the couplers includes a tubular portion which has two opposite open ends for insertion of a pair of the adjoining ends of the upper and lower frame sections, and a socket portion which projects from the tubular portion between the open ends and which has a socket hole. The posts bridge the upper and lower frames and are connected to the couplers.

Abstract: A playpen includes a looped upper frame disposed above and spaced apart from a looped lower frame in a vertical direction. A plurality of vertical posts bridge the upper and lower frames. A cot has a bottom wall and a surrounding wall that is connected to a periphery of the bottom wall and that extends upwardly from the bottom wall. The surrounding wall has a length in the vertical direction which is shorter than a distance between the upper and lower frames in the vertical direction. The surrounding wall further has a distal top portion that engages removably the upper frame for suspending the cot thereon such that the bottom wall is disposed above the lower frame. A releasable fastening unit is provided on the distal top portion of the surrounding wall and the vertical posts for fastening releasably the cot on the vertical posts.

Abstract: A foldable rod linkage for connecting a handgrip to a front wheel of a foldable stroller includes a lower mount member having front lateral walls extending rearwardly from two ends of an upright front wall, an upward abutment wall between the left and right front lateral walls, an upright bore for receiving an upper end of a front rod, and rear lateral walls extending respectively from the front lateral walls. An upper slide body has a through-hole to permit extension of a handle rod such that a lower end of the latter is pivoted on the rear lateral walls, and a downward abutment wall to mate with the upward abutment wall when the linkage is in an unfolded position. An operating device is mounted movably on the handgrip, and includes a pull rod having a lower end mounted on the slide body such that upward pulling of the pull rod will result in disengagement of the slide body from the lower mount member.

Abstract: A rod linkage includes a mount member, a pivotable body, a handle rod, and a front rod. The mount member has left and right lateral walls extending rearwardly from two ends of an upright front wall, an upward abutment wall between the left and right lateral walls, and an upright rear wall which extends downward from a distal side of the upward abutment wall to define an upright bore extending in a first axial direction for receiving an upper end of the front rod. The mount member further has left and right rear lateral walls which extend respectively from the left and right lateral walls and which are disposed below the upright rear wall to form seat portions. The pivotable body includes an elongated member provided with a second upright front wall, and a lower abutment portion supported on the seat portions. The elongated member has a through-hole to permit extension of the handle rod such that a lower end of the latter is pivoted on the rear lateral walls.

Abstract: The rear wheel drive assembly of a motorized stroller includes a transmission unit, a bidirectional motor, a battery unit and a control unit. The transmission unit includes a gear housing to be mounted on a rear wheel support rod of a stroller frame, and a speed reducing gear set mounted operably in the gear housing. The gear set includes an input gear, an output gear driven rotatably by the input gear, and a knurled roller mounted coaxially on one side of the output gear and extending partially out of an open bottom end of the gear housing. The knurled roller contacts the tire portion of a rear wheel on the support rod such that rotation of the input gear results in corresponding rotation of the knurled roller in order to generate friction between the knurled roller and the rear wheel. The motor is mounted on the gear housing and drives rotatably the input gear. The battery unit includes a battery holder mounted on the stroller frame and adapted to receive a storage battery therein.

Abstract: A propping device includes a mounting seat mounted detachably on a baby walker, and a rotatable member mounted pivotally on the mounting seat and including a flat abutting plate portion positioned on the mounting seat above a lower end of the caster. A locking unit can lock automatically and releaseably the abutting plate portion on the mounting seat when the abutting plate portion is rotated relative to the mounting seat to a horizontal location under the caster. When the caster is lifted, the rotatable member can be rotated so as to turn the abutting plate portion to the horizontal position so as to abut the abutting plate portion on the ground, thus preventing rotation of the caster.