Abstract: A shock absorber for a radio control model includes a cylinder and a piston reciprocally received in the cylinder. The piston has an annular groove defined in the periphery thereof and dividing the piston into an upper portion and a lower portion. At least two first holes are defined in the upper portion and communicates with the annular groove. At least one second hole is defined in the lower portion and communicates with the annular groove. At least one of the second hole co-axially aligns with a corresponding one of the at least two first holes and the number of the first hole is greater than that of the second hole. At least one stopper is received in the piston between the first hole and the second hole that align with each other for selectively closing the first hole and the second hole.

Abstract: A fuel tank structure of a remotely controllable car. A fuel pipe is disposed in the fuel tank. A middle section of the fuel pipe has a fuel outlet by which the interior of the fuel pipe is divided into a first section and a second section. Two steel balls are respectively disposed in the first and second sections. The ends of the first and second sections proximal to the fuel outlet are respectively formed with a first and a second passages. The ends of the first and second sections distal from the fuel outlet are respectively formed with a first and a second receiving sections. The fuel pipe is formed with a first inlet between the first passage and the first receiving section and a second inlet between the second passage and the second receiving section.

Abstract: A chassis of remotely controllable car, including an upper board and two side walls which are integrally formed. A lower board is connected under the bottoms of the side walls. The chassis is a frame body integrally formed by the upper board, the lower board and the two side walls. The engine, gear cases and wheels of the remotely controllable car are mounted on the chassis.

Abstract: A forward/backward switch protective structure for a remotely controllable car, including an output shaft having a differential section. Two gears are respectively rotatably disposed at two ends of the differential section. A seat body is fixedly disposed on the differential section and a shade body is fitted on the differential section. The shade body is formed with a differential engaging hole for the differential section to fit therethrough. A shade body is controlled by a shifting mechanism and movable along the differential section. The shade body is formed with an internal chamber for receiving therein the seat body. The chamber is formed with annular grooves. When the engaging sections of the shade body are respectively engaged with the stop sections of the gears, the annular grooves respectively correspond to the throw plates of the seat body. When outward centrifugally extended, the throw plates are inserted into the annular grooves to prevent the shade body from moving.

Abstract: A structure for quickly turning up a car shell of a remotely controllable car, including two fixing boards connected with the car body for fixing the car shell. Each fixing board has a projecting column having a stop section at top end. The car shell is formed with a through hole for the column and the stop section to pass therethrough. A seat body is disposed on inner face of the car shell. A clip disposed on outer face of the car shell is connected with the seat body. The clip has a clip section and a press section. The clip section clips the column of the fixing board and is stopped by the stop section to fix the car shell. When turning up the car shell, the press section is compressed to stretch open the clip section and release the clip section from the stop of the stop section. Then the press section of the clip can be lifted to turn up the car shell.

Abstract: A remote controller has a body and a seat. A holding portion is between the body and the seat for being held by a hand of a user. The body is installed with a trigger and a rotary wheel for being held and operated by two hands of the user. The trigger is installed at an intersection of the body and the holding portion. The rotary wheel is installed on the body facing toward a lateral surface of the user. An angle is formed between an axial line of the rotary wheel and a moving direction of the trigger, wherein the angle is larger than 90 degrees.

Abstract: An assembling structure for main wing of a model airplane. The main wing is composed of a left wing and a right wing. The mating faces of the left and right wings are disposed with complementary engaging seat and engaging block which are mated with each other and tightened by a conic screw. Therefore, the left wing and the right wing can be quickly firmly assembled to form the main wing. The screw can be easily untightened to quickly disassemble the left wing from the right wing for easy carriage or storage.

Abstract: An assembling structure for tail wing of a model airplane. The airplane body has a horizontal connecting face at tail section for connecting with the horizontal tail wing and vertical tail fin. A bottom face of the vertical tail fin is disposed with two projecting fixing rods. A center of the horizontal tail wing is formed with two through holes corresponding to the fixing rods of the tail fin. A sleeve is fitted on inner wall of each through hole. The connecting face of the tail of the airplane body is also formed with two through holes corresponding to the fixing rods of the tail fin. A sleeve is fitted on inner wall of each through hole. The fixing rods of the tail fin can be firmly passed through the tail wing and airplane body and locked by screws. Therefore, the tail wing of the model airplane can be quickly firmly assembled or disassembled from the airplane body for easy carriage or storage.

Abstract: An assembling structure for landing gear of a model airplane, including an airplane body having a base board on which a landing gear fixing seat mounted. The landing gear is fixed on the fixing seat by fixing pins passing through the fixing seat. The cap section of the fixing pin can be rotated by 90 degrees to engage in a channel of the fixing section of the landing gear. Under such circumstance, the landing gear is disengaged from the cap section of the fixing pin and can be quickly disassembled from the fixing seat and separated from the airplane body. Accordingly, the model airplane body and the landing gear can be quickly assembled and disassembled to facilitate carriage and storage of the model airplane.

Abstract: This invention relates to a mat-type entrance lamp to be placed before the front door or gate to facilitate a person to unlock the door or gate in the dark. The lamp comprises a lamp base, a mat member and a switch platform. The lamp base has two through holes and a battery room for batteries to supply energy to the lamp. The mat member has two posts with bulbs to fit in the said through holes, and a recess with a contact projection and three rubber supports which are higher than the projection . The switch platform is sized to fit in the said recess and has a contact plate on the bottom side. The batteries, bulbs and contact plates are connected with cords in such way that when a person stands on the platform, they will make an electric circuit and the lamp will go on.