Abstract: A retaining device of a scooter battery set comprises a support frame mounted on the scooter and provided with a support rod, and insertion portion, and a retaining portion, a battery box having at least one insertion portion, a hanging seat connected with the battery box and provided with a hanging portion, a retaining member pivoted to the hanging seat and provided with a wrenching portion and a retaining portion, and a handle set fastened with the insertion portion of the battery box and provided with a handle. As the handle is lifted or pressed downward, the retaining member is actuated to catch or separate from the retaining portion of the support frame.

Abstract: An electric scooter comprises a footboard on which a folding device, and a driving device are mounted. A steering tube is fastened with the footboard and the folding device. A front wheel is pivoted to the bottom end of the steering tube. A rear wheel is pivoted to the rear end of the footboard such that the rear wheel is driven by the driving device. A battery set is removably fastened with the folding device such that the battery set is located in a receiving space formed between the footboard and the steering tube which is in a folding state.

Abstract: A scooter is provided with a power clutch mechanism enabling the scooter to be moved by a motor of the mechanism, or by pushes made by one foot of a rider of the scooter. The mechanism has a drive wheel mounted on an output shaft of the motor which is mounted on a suspension seat. The suspension seat is pivoted to the base of the scooter such that the suspension seat is urged by an urging member of the mechanism to enable the drive wheel to disengage the rear wheel of the scooter, and that the suspension seat is not urged by the urging member to enable the drive wheel to engage the rear wheel of the scooter.

Abstract: A power device of a scooter is formed of two side plates, a carrying portion, an electric unit. The two side plates are extended from the main board of the scooter. The carrying portion is disposed at bottoms of the two side plates to form a receiving space in conjunction with the side plates and the main board. The electric unit is disposed in the receiving space and is well protected by the main board, the side plates, and the carrying portion.

Abstract: A scooter carrying structure comprises a shoulder strap and two retaining rings which are fastened with the upper end and the lower end of the collapsible upright handlebar of the scooter. The shoulder strap is provided at both ends with a retaining hook and is retained by the upright handlebar such that the retaining hooks of the shoulder strap are engaged with the two retaining rings of the upright handlebar. As the upright handlebar is collapsed, the shoulder strap is worn over the shoulder of a person for carrying the scooter.

Abstract: A scooter rear wheel brake comprises a first wheel cover and a second wheel cover. The first wheel cover is mounted on the support frame of the scooter and is located over a predetermined position of the wheel rim. The first wheel cover is provided with a connection portion. The second wheel cover is movably connected with the connection portion of the first wheel cover such that the second wheel cover is located over another predetermined position of the wheel. The first wheel cover can be freely disposed at the position of the second wheel cover. The second wheel cover can be pressed against the wheel rim to bring about the braking effect.

Abstract: A scooter rear wheel brake comprises a rear wheel cover which is mounted on the scooter footboard such that the rear wheel cover is located over the rear wheel of the scooter. The rear wheel cover is provided with a brake applying block and a brake shoe mount corresponding in location to the brake applying block. The brake shoe is linked with the brake applying block by which the brake shoe is actuated to act on the rear wheel in motion.

Abstract: A skate cart includes a horizontal body with a section extending from a front end of the horizontal body, and a rear wheel is connected to a bottom of a rear end of the horizontal body. A tube is pivotably connected to the section and a handlebar stem is connected to the tube. The handlebar stem has a front wheel connected thereto. An engaging device is pivotably connected to the tube and has a first hook end for engaging with a stop on a top of the section when the skate cart is riding, and a second hook end for engaging with the section when the cart is folded. A spring is biased between the engaging device and the tube.

Abstract: A handlebar height device for a skate cart includes a head tube through which a handlebar column extends. The head tube has a top section and a lower section which has an enlarged inner diameter. A steerer tube is inserted into the lower section and has an open top. The handlebar column is retractably received in the head tube and the steerer tube via the open top of the steerer tube.

Abstract: A scooter has a battery set retaining device which comprises a support frame fastened with the scooter. The support frame is formed of a support portion, an insertion portion, and a retaining portion. The insertion portion is provided with a hanging portion to which a retaining member is pivoted. The battery set is retained by the hanging portion which is engaged with the insertion portion of the support frame. The retaining portion of the retaining member is capable of engaging and disengaging the retaining portion of the support frame.

Abstract: A power clutch mechanism of a scooter is formed of a power unit, an elastic member, a connection rod set, and an urging member. The power unit comprises a suspension seat pivoted with a footboard of the scooter, and a motor mounted on the suspension seat and provided with an output shaft on which a drive wheel is mounted in such a manner that the drive wheel is detachably engaged with a rear wheel of the scooter. The elastic member connects the suspension seat and a rear fork of the scooter. The connection rod set is formed of a first rod member and a second rod member pivoted with the first rod member by a pivot such that the second rod member and the first rod member form therebetween an angle, and that the first rod member is pivoted with the rear fork, and further that the second rod member is pivoted with the suspension seat.

Abstract: A collapsible skateboard includes an upright handle having lower portion on which is fixedly mounted a bracket, a connector having a curved slot having a lower end formed with a horizontal recess, an upper end formed with a vertical recess, and a circular hole under the vertical recess, an adjust pin inserted into the vertical recess of the connector and the elongated hole of the bracket, a pivot pin fitted through the circular hole of the connector and the circular hole of the bracket, a spring having an upper end connected to the adjust pin and a lower end to the pivot pin, and a platform on which is fixedly mounted the connector, whereby the skateboard can be easily folded up as desired.

Abstract: A collapsible skateboard includes an upright handle having lower portion on which is fixedly mounted a bracket, a connector having a curved slot having a lower end formed with a horizontal recess, an upper end formed with a vertical recess, and a circular hole under the vertical recess, an adjust pin inserted into the vertical recess of the connector and the elongated hole of the bracket, a pivot pin fitted through the circular hole of the connector and the circular hole of the bracket, a spring having an upper end connected to the adjust pin and a lower end to the pivot pin, and a platform on which is fixedly mounted the connector, whereby the skateboard can be easily folded up as desired.

Abstract: A brake device for a skate cart includes a rear wheel hood pivotally connected to the frame of the skate cart and the rear wheel hood has a curved engaging inside so as to contact the rear wheel of the skate cart and stop the skate cart. A resilient member has one end thereof connected to the rear wheel hood and the other end of the resilient member is connected to the frame. When stepping on the rear wheel hood, the rear wheel hood is pivoted to contact the rear wheel and when removing the foot from the rear wheel hood, the rear wheel hood returns by the resilient member.