1. Field of the Invention
The present invention relates to a compound bow, and more particularly to a compound bow with a protector to protect the user's hand from being injured by the string.
2. Description of Related Art
A conventional bow generally includes a bow and a string is connected between the two limbs of the bow. The string can be pulled away from the bow to store energy. An arrow is attached with the string by its nock so that when the string is released, the arrow is delivered to the target by the energy.
Another conventional bow known to applicant comprises a grip with two limbs connected thereto, a string is connected between the two limbs. The bow has a rom and a passage which communicates with the room. A buffering member is located in the room. An arrow has a shank with a tip and a nock formed on two ends thereof, the shaft extends through the passage and the nock is connected with the string, while the tip is located in the room. When releasing the string, the tip is movable in the room and the buffering member absorbs the energy of the tip in the room so that the bow can be used in a small area and the buffering member protect the users from being injured during the action.
However, the conventional bows mentioned above are too light to be used for sport purpose because the light bows lack stability.
The present invention provides a compound bow structure with a protector so as to mitigate and/or obviate the disadvantages of the conventional bows.
The main objective of the present invention is to provide a compound bow structure which has a protector located between the grip and the string so as to protect the user's hand from being hit by the string after the string is released.
The present invention provides a compound bow structure and comprises a riser having a grip, and two extensions extend from two ends of the grip. A recess is defined in the inside of the grip. Two limbs are respectively connected to two distal ends of the two extensions. A protector is connected to the inside of the grip and located between the two limbs. The protector is located to cover the recess of the grip. A control unit has a first cam and a second cam respectively connected to two respective distal ends of the two limbs. A string is connected between the first and second cams. Two cables each have a first end connected to the first/second cam corresponding thereto. The two cables each have a second end which has two split sub-cables. The sub-cables of the two cables are respectively, connected to two sides of the first/second cam corresponding thereto. The distance between the lowest point of the recess and the string is smaller than ⅕ of the length of the string.
Preferably, the protector is an elongate plate which has two ends, and the two ends of the protector are connected to two ends of the recess. A gap is formed between the grip and the protector so as to accommodate the user's hand.
Preferably, each of the two limbs has a notch to form a first arm and a second arm. The first and second cams are respectively located in the two notches of the two limbs. The axle of each of the first and second cams is connected between the first and second arms corresponding thereto.
Preferably, the sub-cables of the cables are respectively connected to two ends of the axle of the first/second cam corresponding thereto to adjust the tension of the string and to adjust the distance between the string and the riser.
Preferably, the coefficient of elasticity of each of the two limbs is larger than that of the riser.
Preferably, the distance between the lowest point of the recess and the string is equal to ⅙ of the length of the string.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
Referring to the drawings and initially to
A control unit 4 comprises a first cam 41 and a second cam 42 respectively connected to two respective distal ends of the two limbs 2. In detail, the first and second cams 41, 42 are respectively located in the two notches 21 of the two limbs 2. Each of the first and second cams 41, 42 has an axle 6 extending therethrough. The axle 6 of each of the first and second cams 41, 42 is connected between the first and second arms 41, 42 corresponding thereto.
A string 43 is connected between the first and second cams 41, 42. Two cables 44 each have a first end connected to the first/second cam 41/42. The two cables 44 each have a second end which has two split sub-cables 441. The two sets of the sub-cables 441 of the two cables 44 are respectively connected to the two ends of the axle 6 of the first/second cam 41/42 corresponding thereto to adjust the tension of the string 43 and to adjust the distance between the string 43 and the riser 1. Further referring to
When in use, further referring to
The protector 3 is durable and light in weight. Preferably, the protector 3 is made by plastic or hard rubber. The protector 3 can be connected to the grip 11 by using screws, rivets or by way of snapping. The user's hand in the gap 5 is large enough to allow the user's hand to easily inserted and remove. Preferably, the distance “L” between the lowest point of the recess 131 and the string 43 is equal to ⅙ of the length “D” of the string 43.
Furthermore, the notch 21 defined in each of the two limbs 2 reduces the weight of the limb 2. The first and second cams 41, 42 are located within the two respective notches 21 to allow the shorter limbs 41, 42 to be used.
The sub-cables 441 of each of the cables 44 are respectively connected to the two ends of the axle 6 of the first/second cam 41/42 corresponding thereto to adjust the tension of the string 43 and to adjust the distance between the string 43 and the riser 1.
The coefficient of elasticity of each of the two limbs 2 is larger than that of the riser 1 so as to allow the limbs 2 to be further deformed relative to the riser 1 to obtain longer stroke.
The riser 1 and the limbs 2 can be integral to each other, or the riser 1 and the limbs 2 can be assembled to each other. The weight of the limbs 2 is controlled not to increase the whole weight of the compound bow structure of the present invention. The proper length of the limbs 2 can stabilize the compound bow structure without being affected by the return of the string 43.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.