Abstract: A base of a shock-absorbing front fork for a bicycle includes two straight tubes and a bridge. The bridge has two ends connected integrally with an upper section of each of the straight tubes. The bridge has a chamber therein. Thus, the base of the shock-absorbing front fork has the advantages of high structural strength and long service life.

Abstract: A base of a shock-absorbing front fork for a bicycle includes two straight tubes and a bridge. The bridge has two ends connected integrally with an upper section of each of the straight tubes. The bridge has a chamber therein. Thus, the base of the shock-absorbing front fork has the advantages of high structural strength and long service life.

Abstract: A front frame for a bicycle includes an upper tube, a lower tube and a head tube all of which are made of fiber reinforced material. The head tube extends integrally from a front end of the upper tube and a front end of the lower tube. The head tube has a chamber communicates with a chamber of the upper tube and a chamber of the lower tube. Two inner tubes are provided in the chamber of the upper tube. The abutted portions of the two inner tubes form a rib such that the structure strength of the upper tube is improved.

Abstract: A front fork for a bicycle includes an upright tube, a fork crown and two branch tubes. The upright tube is mounted on a bottom end of the upright tube. The branch tubes each have a top connected to the fork crown, and a rib located inside an upper section thereof. Thus, the upper sections of the branch tubes have well structural rigidity for increasing the transmission efficiency of the bicycle. The lower sections of the branch tubes have well flexibility for enhancing the rider's riding comfort.

Abstract: An upper frame of a front fork for a bicycle includes an upright tube and two branch tubes. The upright tube has an axial rib. The two branch tubes extend bilaterally from a bottom end of the upright tube and each have an axial rib parallel substantially to a longitudinal direction of the upright tube and a connecting portion located at an end of the branch tube for connection of a fork tube. Thus, the structure strength of the upright tube can be enhanced by the axial rib thereof, and the structure strength of the branch tubes can be enhanced by the axial ribs thereof to bear stress generated from the fork tubes.

Abstract: A seat tube for a bicycle includes an upright tube, a head and an inner tube all of which are made of fiber reinforced material. The upright tube has an inserting portion at a top thereof. The head has an inside chamber and a sleeve portion at a bottom thereof. The sleeve portion of the head is sleeved onto the inserting portion of the upright tube such that the inside chamber of the head is communicated with an inside of the upright tube. An outer wall of the inserting portion of the upright tube is a taper face converging upward. The inner tube is disposed at a junction of the upright tube and the head and interconnected with the upright tube and the head. Thus, the seat tube has strong structure with light weight.

Abstract: A rear frame for a bicycle is disclosed to include two tubes and a connecting portion. The tubes are respectively made of fiber reinforced material and have at least one rib therein. The connecting portion is connected between the tubes. By means of the aforesaid arrangement, the rear frame has a high mechanical strength and light weight.

Abstract: A multifunction racket in which the head frame has multiple elongated slots and ribs positioned in each elongated slot such that the user can selectively insert shock absorbing members of different weights and shock absorbing characteristics into the elongated slots of the head frame to adjust the location of the gravity center and shock absorbing characteristic of the racket.

Abstract: A forming method for fiber reinforced resin includes the following steps. First, put a stack of pre-pregs into a cavity of a die having a plurality of openings in communication with the cavity and the space outside the die. Then heat the die and exhaust air through the openings from the cavity of the die. Thus, the air bubbles between the pre-pregs as well as surplus resin can be drawn out such that the product has improved mechanical strength.

Abstract: A rear frame for a bicycle is disclosed to include two tubes and a connecting portion. The tubes are respectively made of fiber reinforced material and have at least one rib therein. The connecting portion is connected between the tubes. By means of the aforesaid arrangement, the rear frame has a high mechanical strength and light weight.

Abstract: A front fork for a bicycle includes an upright tube and two arms all of which are made of fiber reinforced material. The two arms extend substantially parallel from a bottom of the upright tube. The two arms each have two inner tubes abutted together and an outer tube sleeved onto the two inner tubes. The abutted portions of the two inner tubes form a rib which is parallel to a plane where the two arms are disposed. Thus, the front fork has strong structure and light weight.

Abstract: A safety racket includes a head frame, a handle, a connecting portion, several nail members and a string. The head frame has a plurality of through holes. The connecting portion connects between the head frame and the handle. The nail members each have a head and at least one body extending along an axial direction from the head and inserted into the through hole. The body of the nail member has a distal end protruding from the through hole, and a lateral hole positioned at the distal end and extending along a direction substantially perpendicular to the axial direction. The string passes through the lateral hole and interweaved to form a net surface. Since the string is not exposed outside the head frame, the string is well protected to avoid damaging by external objects. The racket also has excellent shock-absorbing effect due to elastic material, such as rubber and plastic, adopted by the nail members.

Abstract: A front frame for a bicycle includes an upper tube, a lower tube and a head tube all of which are made of fiber reinforced material. The head tube extends integrally from a front end of the upper tube and a front end of the lower tube. The head tube has a chamber communicates with a chamber of the upper tube and a chamber of the lower tube. Two inner tubes are provided in the chamber of the upper tube. The abutted portions of the two inner tubes form a rib such that the structure strength of the upper tube is improved.

Abstract: A seat tube for a bicycle includes an upright tube, a head and an inner tube all of which are made of fiber reinforced material. The upright tube has an inserting portion at a top thereof. The head has an inside chamber and a sleeve portion at a bottom thereof. The sleeve portion of the head is sleeved onto the inserting portion of the upright tube such that the inside chamber of the head is communicated with an inside of the upright tube. An outer wall of the inserting portion of the upright tube is a taper face converging upward. The inner tube is disposed at a junction of the upright tube and the head and interconnected with the upright tube and the head. Thus, the seat tube has strong structure with light weight.

Abstract: A method of manufacturing a vehicle front frame includes wrapping a pre-preg around a mandrel and curing the pre-preg to form an upright tube. Secondly, winding two pre-pregs into two elongated tubes and connecting a middle portion of each of the two elongated tubes with an end of the upright tube. Then placing the upright tube and the two elongated tubes into a die. Inflating the two elongated tubes to make the two elongated tubes abut on the inner wall of the die, and curing the two elongated tubes to form a front fork that joins the upright tube. The manufacturing method has a simple operating process. In addition, the product made by the method has improved mechanical strength.

Abstract: A front fork for a bicycle includes an upright tube and two arms all of which are made of fiber reinforced material. The two arms extend substantially parallel from a bottom of the upright tube. The two arms each have two inner tubes abutted together and an outer tube sleeved onto the two inner tubes. The abutted portions of the two inner tubes form a rib which is parallel to a plane where the two arms are disposed. Thus, the front fork has strong structure and light weight.

Abstract: A racket includes a frame having a rim and a connection portion at an end of the rim, a handle fixed at a distal end of the connection portion, an elastic member attached on a predetermined portion of the frame, and a cover layer wrapped around the frame and the elastic member. The vibration wave transmission velocities of the frame, the elastic member and the cover layer are different from one another and the vibration is therefore reduced while transmitting therethrough.

Abstract: A racket includes a frame having a rim and a connection portion at an end of the rim, a handle fixed at a distal end of the connection portion, an elastic member attached on a predetermined portion of the frame, and a cover layer wrapped around the frame and the elastic member. The vibration wave transmission velocities of the frame, the elastic member and the cover layer are different from one another and the vibration is therefore reduced while transmitting therethrough.

Abstract: A racket frame is constructed to include a body, the body having an endless head and a shaft extended from the endless head for the mounting of a grip, and two wooden strips fastened to the endless head of the body at two sides, the wooden strips taking about 5%˜70% of the volume of the racket frame.