Abstract: An adjustable handle assembly for a personal mobility vehicle includes a mounting bracket, an adjusting device including a primary and secondary pivot post pivotally on the mounting bracket and a mechanical lock interconnecting the two pivot posts. The mechanical lock includes a stationary bracket mounted on the primary pivot post, a bushing bracket pivotally mounted in the stationary bracket, a connecting tube, locking wedges and a sliding block. The connecting tube is attached to the bushing bracket, is hollow for slidably receiving the secondary pivot post and has multiple wedge holes that respectively movably hold locking wedges. The sliding block is slidably mounted on the connecting tube and has a bottom annular bevel that presses the locking wedges to clamp the secondary pivot post in place when the sliding block is forced to a locked position.

Abstract: A connecting device for a joystick controller on an electric wheelchair has a post, two rods and a base. The post has two brackets attached to the post. The two rods are pivotally attached respectively to the two brackets in parallel with each other. The base is pivotally attached to the two rods to achieve a four-bar linkage. The joystick controller is adjustably and detachably mounted on the base. The four-bar linkage keeps the joystick controller oriented in a constant direction when the base moves relatively to the electric wheelchair. Therefore, the joystick controller has a fixed orientation relative to the wheelchair.

Abstract: A latch device for a foldable steering head on an electric motorcycle has a base, an inner wheel, and an outer ring. The inner wheel is mounted on the base and has a radius-varying actuating shaft axially penetrating the inner wheel and a latching block radially and movably mounted inside the inner wheel. The latching block has an abutting end and is operationally pushed by the actuating shaft. The outer ring rotatably surrounds the inner wheel and has an inner periphery and multiple detents defined on the inner periphery to operationally engage the abutting end of the latching block so that the latch device locks. By simply pushing the actuating shaft to a radius-narrowing area, the latching block is released from push of the actuating shaft and can move inward to allow the outer ring to rotate. Therefore, the steering head can be conveniently adjusted.

Abstract: A cart has a folding support for handlebars, which includes a lower rod secured on a front part of a frame, a pivotal rod pivoted to an upper end of the lower rod, and an upper tube positioned in a linearly displaceable manner around the pivotal rod from a lower end; the pivotal rod has a lengthways extending slot; the upper tube has two opposing holes; handlebars of the cart are connected to an upper end of the upper tube; a connecting element is passed through the opposing holes and the slot such that the upper tube will prevent the pivotal rod from moving relative to the lower rod when it is around the pivotal rod and the lower rod, and such that the support can be folded with the pivotal rod pivoting on the lower rod when the upper tube is apart from the lower rod.

Abstract: A speed limiting device of an electric cart includes a measuring mechanism used for measuring an angle, at which the cart is turning, a conversion mechanism, a comparer, and a switch; the conversion mechanism can perform calculation based on both an input angle and a predetermined centrifugal speed to obtain a maximum allowed speed; the switch is connected to a motor of the cart; first and second alternative contacts are provided for the switch to selectively touch; the first contact is connected to the output terminal of the conversion mechanism; the present speed value is sent to the second contact and the comparer, which can make a comparison between the present speed and the maximum speed, according to the result of which comparison the switch will touch either one of the contacts, thus making the cart run at a smaller one of the above two speeds when the cart is turning.

Abstract: A cart has a folding support for handlebars, which includes a lower rod secured on a front part of a frame, a pivotal rod pivoted to an upper end of the lower rod, and an upper tube positioned in a linearly displaceable manner around the pivotal rod from a lower end; the pivotal rod has a lengthways extending slot; the upper tube has two opposing holes; handlebars of the cart are connected to an upper end of the upper tube; a connecting element is passed through the opposing holes and the slot such that the upper tube will prevent the pivotal rod from moving relative to the lower rod when it is around the pivotal rod and the lower rod, and such that the support can be folded with the pivotal rod pivoting on the lower rod when the upper tube is apart from the lower rod.

Abstract: A device of a cart includes a control, a speed regulating potentiometer, a microprocessor, a digital-to-analogue converter, a motor controlling unit, and a switch; the control is angularly displaceable and near to handlebars of the cart; the potentiometer is connected to the control so as to output a voltage, which depends on displacement of the control; the microprocessor can produce digital signals according to the output voltage of the potentiometer; the converter is used for converting the digital signals into analogue voltage; the motor controlling unit is used for making a motor run at a variable-speed mode, at which mode the speed of the motor will depend on output voltage of the converter; immediately after the rider presses the switch, the microprocessor will ignore output voltage of the potentiometer, and start and continue giving a same digital signal to the converter so that the motor starts running at constant speed.

Abstract: A frame of an electric cart includes a front part, and a rear part separable from the front part; the front part has a locating member secured on a rear end thereof; the rear part has a connecting member secured on a front end thereof for engaging the locating member, which connecting member has a spring-loaded engaging pin passed through it; the pin is made such as to be capable of engaging the locating member automatically while the rear part is being moved so as to fit the connecting member onto the locating member, thus securely joining the rear part to the front part; the engaging pin will be disengaged from the fitting portion when it is pressed at a first end, thus allowing the rear part to be separated from the front part.

Abstract: A turning mechanism of an electric cart includes twin front wheels, a control shaft, and an axle; the shaft has a horizontal rod portion at a lower end; the front wheels are connected to two ends of the axle while the axle is arranged under the horizontal rod portion; the front wheels are much closer to each other than rear wheels are to each other; springs are located between the axle and the horizontal rod portion; connecting plates are arranged next to fronts and rears of the horizontal rod portion and the axle, and each has two fitting holes respectively opposing a through hole of the horizontal rod portion, and a through hole of the axle; ringed pads are inserted in respective fitting holes, and bolts are inserted through the ringed pads, and the through holes; thus, the cart is like a three-wheel one in terms of easiness to use and simplicity of the structure.

Abstract: A shock absorber is provided to a seat of a wheelchair, which includes an outer tube secured on an upper side of a frame of the wheelchair, an inner tube secured on a bottom of the seat and movably passed into the outer tube, and a spring-loaded shock absorbing mechanism; the outer tube is formed with a pair of opposing radial through holes on an upper end portion thereof; the inner tube is formed with two opposing lengthwise extending slots, and is prevented from separating from the outer tube with help of a pin, which is passed through the radial holes as well as the slots; the shock absorbing mechanism is held in the outer tube and connected to the outer tube, and a lower end of the inner tube at lower and upper ends respectively.

Abstract: A shock absorber is provided to a seat of a wheelchair, which includes an outer tube secured on an upper side of a frame of the wheelchair, an inner tube secured on a bottom of the seat and movably passed into the outer tube, and a spring-loaded shock absorbing mechanism; the outer tube is formed with a pair of opposing radial through holes on an upper end portion thereof; the inner tube is formed with two opposing lengthwise extending slots, and is prevented from separating from the outer tube with help of a pin, which is passed through the radial holes as well as the slots; the shock absorbing mechanism is held in the outer tube and connected to the outer tube, and a lower end of the inner tube at lower and upper ends respectively.

Abstract: An electrical connector assembly is adapted for interconnecting first and second conductors provided respectively on first and second vehicle components that are coupled removably to each other, and includes first and second electrical connectors. The first electrical connector includes a first insulator seat to be mounted on the first vehicle component, and a plurality of first contacts mounted on the first insulator seat and to be coupled electrically and respectively to the first conductors. The second electrical connector includes a second insulator seat to be mounted on the second vehicle component, and a plurality of second contacts mounted pivotally on the second insulator seat and to be coupled electrically and respectively to the second conductors. The second contacts are biased such that, when the first and second vehicle components are coupled together, the second contacts are able to establish tight electrical contact with the first contacts, respectively.

Abstract: A frame of an electric cart includes a front part, and a rear part separable from the front part; the front part has a locating member secured on a rear end thereof; the rear part has a connecting member secured on a front end thereof for engaging the locating member, which connecting member has a spring-loaded engaging pin passed through it; the pin is made such as to be capable of engaging the locating member automatically while the rear part is being moved so as to fit the connecting member onto the locating member, thus securely joining the rear part to the front part; the engaging pin will be disengaged from the fitting portion when it is pressed at a first end, thus allowing the rear part to be separated from the front part.

Abstract: A handle-adjusting device for adjusting position of a handle relative to a vehicle frame includes a valve cylinder with a valve rod, and a control rod that is formed with a pressing face and a release face. When the control rod is operated to align the pressing face with an upper end of the valve rod, the valve rod is disposed at a retracted position so as to enable rotation of the handle relative to the vehicle frame. When the control rod is operated to align the release face with the upper end of the valve rod, the valve rod is disposed at the extended position so as to prevent rotation of the handle relative to the vehicle frame.

Abstract: A motor vehicle includes a wheeled vehicle body, a driving device for driving the vehicle body to move on the ground, a seat, and a shock-absorbing device for supporting the seat on the vehicle body. The shock-absorbing device includes a vertical mounting tube fixed on the vehicle body, and a damping unit disposed between the mounting tube and the seat such that the seat can move vertically on the mounting tube and such that the damping unit can retard vertical movement of the seat relative to the mounting tube.

Abstract: An adjustable handle assembly for a personal mobility vehicle includes a mounting bracket, an adjusting device including a primary and secondary pivot post pivotally on the mounting bracket and a mechanical lock interconnecting the two pivot posts. The mechanical lock includes a stationary bracket mounted on the primary pivot post, a bushing bracket pivotally mounted in the stationary bracket, a connecting tube, locking wedges and a sliding block. The connecting tube is attached to the bushing bracket, is hollow for slidably receiving the secondary pivot post and has multiple wedge holes that respectively movably hold locking wedges. The sliding block is slidably mounted on the connecting tube and has a bottom annular bevel that presses the locking wedges to clamp the secondary pivot post in place when the sliding block is forced to a locked position.

Abstract: A turning mechanism of an electric cart includes twin front wheels, a control shaft, and an axle; the shaft has a horizontal rod portion at a lower end; the front wheels are connected to two ends of the axle while the axle is arranged under the horizontal rod portion; the front wheels are much closer to each other than rear wheels are to each other; springs are located between the axle and the horizontal rod portion; connecting plates are arranged next to fronts and rears of the horizontal rod portion and the axle, and each has two fitting holes respectively opposing a through hole of the horizontal rod portion, and a through hole of the axle; ringed pads are inserted in respective fitting holes, and bolts are inserted through the ringed pads, and the through holes; thus, the cart is like a three-wheel one in terms of easiness to use and simplicity of the structure.

Abstract: A vehicle chassis includes first and second chassis members, and a locking device. Each of the first and second chassis members includes a connector formed with a hole unit therethrough. The locking device includes a locking pin that extends through the hole units in the connectors, and a resilient retainer that latches releasably to one end of the locking pin.

Abstract: A direction and speed control device includes a casing, a sensing unit, and a magnet assembly. The sensing unit includes a magnetic sensor. The magnet assembly includes a pivot axle that is mounted rotatably on the casing and that has a magnet carrying portion extending into the casing, and a driven portion extending from the magnet carrying portion and disposed outwardly of the casing, and further includes first and second magnets mounted on the magnet carrying portion and disposed on opposite sides of the magnetic sensor. The driven portion is operable to rotate the pivot axle relative to the casing so as to displace the first and second magnets relative to the magnetic sensor. The sensing unit generates a control output for controlling direction and speed of a motor vehicle in accordance with the displacement of the first and second magnets relative to the magnetic sensor.

Abstract: An electric wheelchair includes a frame, and a seat; the frame has front and rear support rods projecting upwards from it, locating parts secured to the front support rods, and fitting parts secured to the rear support rods; each locating part has opposing guide trenches; each fitting part has lateral portions formed with opposing holes; the seat has engaging elements, and fitting elements secured to the lower side; each engaging element has a slide rod; each fitting element has opposing holes on lateral portions thereof; thus, the seat can be secured to the frame by means of passing pins through the holes of the fitting parts and the fitting elements after the slide rods are passed into the guide trenches, and after the holes of the fitting elements are aligned with the holes of the fitting parts.