Abstract: A crossbow device at least comprises a stock with a body portion, a track, and a aiming position member. A lower bow portion is arranged at the front of the body portion which includes a connection portion and a first screw hole is arranged thereinside. A bow frame is fastened in the track and assembled with the aiming position member. A second screw hole is formed at the front of each rod. A bow string set is assembled with the bow frame. Tow positioning blocks are protruded in the limit groove and a third screw hole is arranged at each positioning block and corresponding to the second screw hole. A fourth screw hole is arranged at a hook portion and corresponding to the first screw hole. The screw members are screwed in the third screw hole, the second screw hole, and the fourth screw hole of the hook portion.

Abstract: A compound bow structure includes a riser having a grip and a recess is defined in the inside of the grip. A first cam and a second cam are respectively connected to the two limbs and 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. A protector is connected to the inside of the grip and located to cover the recess of the grip. A gap is formed between the grip and the protector to accommodate the user's hand. The distance between the lowest point of the recess and the string is smaller than ? of the length of the string.

Abstract: A bow includes a riser, a pair of limbs, two pulleys, and a bow string set. Each pulley includes a primary wheel and a secondary wheel adjacent to the primary wheel. The bow string set includes a let-off cable, a first take-up cable and a second take-up cable. The let-off cable has opposite ends respectively trained about the primary wheels of the pulleys. The first take-up cable has one end strung about the secondary wheel of one of the pulleys, and the other end anchored to a right rear side of the riser, without extending across a launching path of the bow. Similarly, the second take-up cable has one end strung about the secondary wheel of the other pulley, and the other end anchored to a left rear side of the riser, without extending across the launching path of the bow.

Abstract: A crossbow includes a stock, a riser disposed at a front of the stock, a pair of limbs attached to opposite ends of the riser, first and second pulleys respectively mounted on rear tips of the limbs, and a bow string set. The stock. Each of the first and second pulleys includes a primary wheel and a secondary wheel. The bow string set includes a let-off cable, a first take-up cable and a second take-up cable. The let-off cable extends across and over the track of the stock and has opposite ends respectively trained about the primary wheels of the first and second pulleys. In particular, both of the first and second take-up cable extend across the stock and are substantially positioned higher than the let-off cable.

Abstract: A quick-release device for a crossbow stock assembly includes a main body having a fixing member which is threadedly connected to the extension of the stock. An axial groove is defined in the outside of the threaded section of the extension. A locking member is pivotably connected to the fixing member and positioned between a locked position and a release position. The locking member has an engaging end and a press end. The engaging end is engaged with the axial groove when the locking member is located at the locked position, and the engaging end is separated from the axial groove when the locking member is located at the release position. A collar is threadedly connected to the threaded section to keep the locking member at the locked position. The stock is quickly installed to or removed from the main body of the crossbow.

Abstract: A crossbow assembly includes a body having an insertion hole and a retention member protrudes from the insertion hole. A barrel has a first end inserted into the insertion hole and a second end of the barrel extends beyond the insertion hole. A recess is defined in the top of the second end of the barrel. An upper portion is connected to the top of the barrel. A lower portion is formed at the underside of the barrel. The thickness of the upper portion is smaller than or equal to a half of that of the lower portion. A bow unit is connected to the second end of the upper portion and includes a riser, two limbs and two cam units. The upper portion is connected to two plates extending from a slot in the riser by two bolts. The crossbow assembly has a stable weight center.

Abstract: A quick-release device for a crossbow stock assembly includes a main body having a fixing member which is threadedly connected to the extension of the stock. An axial groove is defined in the outside of the threaded section of the extension. A locking member is pivotably connected to the fixing member and positioned between a locked position and a release position. The locking member has an engaging end and a press end. The engaging end is engaged with the axial groove when the locking member is located at the locked position, and the engaging end is separated from the axial groove when the locking member is located at the release position. A collar is threadedly connected to the threaded section to keep the locking member at the locked position. The stock is quickly installed to or removed from the main body of the crossbow.

Abstract: A riser of a compound bow includes a lower section and an upper section. The upper section has an end section and a connection section which is connected to the lower section by engagement of pins and pin holes of the two respective connection ends. The connection is further reinforced by way of welding. The end section is further connected with the connection section by engagement of pins and pin holes of the two respective connection ends. The connection is further reinforced by way of welding. The riser is strong and saves material.

Abstract: A riser of a compound bow includes a lower section and an upper section. The upper section has an end section and a connection section which is connected to the lower section by engagement of pins and pin holes of the two respective connection ends. The connection is further reinforced by way of welding. The end section is further connected with the connection section by engagement of pins and pin holes of the two respective connection ends. The connection is further reinforced by way of welding. The riser is strong and saves material.

Abstract: A bowstring drawing assembly for a bow has a mounting frame, an operating device and a connecting belt. The mounting frame has a bottom bar, two supporting shafts and two pulleys. The supporting shafts are connected to the bottom bar. The pulleys are connected to the supporting shafts to hold the bow. The operating device is mounted on the mounting frame and has a holding seat, a rotating rod, a worm wheel, a worm shaft and a crank shaft. The holding seat is mounted on the bottom bar. The rotating rod is rotatably connected to the holding seat. The worm wheel is mounted around the rotating rod. The worm shaft is rotatably connected to the holding seat and engages the worm wheel. The crank shaft is connected securely to the worm shaft. The connecting belt is connected to the rotating rod of the operating device to mount around the bow.

Abstract: A bowstring drawing assembly for a bow has a mounting frame, an operating device and a connecting belt. The mounting frame has a bottom bar, two supporting shafts and two pulleys. The supporting shafts are connected to the bottom bar. The pulleys are connected to the supporting shafts to hold the bow. The operating device is mounted on the mounting frame and has a holding seat, a rotating rod, a worm wheel, a worm shaft and a crank shaft. The holding seat is mounted on the bottom bar. The rotating rod is rotatably connected to the holding seat. The worm wheel is mounted around the rotating rod. The worm shaft is rotatably connected to the holding seat and engages the worm wheel. The crank shaft is connected securely to the worm shaft. The connecting belt is connected to the rotating rod of the operating device to mount around the bow.

Abstract: A trigger assembly has a housing, a trigger, a string holder, a bowstring catch biasing member, a safety pin, a safety lock, a pushing arm, a block, a block biasing member and a string stop. The housing has a mouth. The trigger has a trigger element and an actuating lever combined with the trigger element by dovetailed recess and protrusion. The bowstring catch has a string hook and a leg selectively engaging the hook on the actuating lever. The safety pin is moveably mounted in the housing and is supported on the actuating lever. The safety lock is moveably mounted in the housing and has a push rod. The pushing arm has a protrusion abutting the push rod. The block has a transverse rod selectively engaging the front end of the pushing arm. Accordingly, a trigger assembly with two safety features is provided.

Abstract: A bow for a crossbow includes a retainer, two holders, two limbs, two mounting members and two fastening members. The retainer has two inclined surfaces having a receiving recess. Each holder is mounted on one of the inclined surfaces and includes a base, a cover and a semicircular pivot. The semicircular pivot is mounted detachably on the outer end of the base and corresponds to and abuts with the receiving recess of the inclined surface. Each buffer is mounted between one of the limbs and the base of a corresponding holder for absorbing the force applied to the limb and reducing stress concentration to prolong the useful life of the limb.

Abstract: An adjustable cam for a crossbow has a main disk, a weight-adjusting block and a length-adjusting block. The main disk has two sides, a group of string hooks, a group of weight-selecting holes, and a group of length-selecting holes. The group of string hooks is formed on one side of the main disk. The group of weight-selecting holes and the group of length-selecting holes are defined through the main disk in different areas. The weight-adjusting and the length-adjusting blocks are pivotally and coaxially mounted on the other side of the main disk. Each block has a securing hole to engage the one hole in a corresponding group. By attaching a bowstring to different string hooks and engaging the blocks to the corresponding hole in the groups, tension degrees and draw lengths are adjustable in various modifications to make the crossbow have versatile options to satisfy different users.

Abstract: A crossbow with a vibration-damping device has a stock assembly, a bow assembly, a bushing and at least one resilient element. The stock assembly has a front end. The bow assembly is attached to the front end of the stock assembly. The bushing is clamped between the stock assembly and the bow assembly. The at least one resilient element serves as a vibration-damping device and is clamped between the bushing and the bow assembly. By adding the resilient element, vibrations of the bow assembly are greatly reduced, and the bushing can be selectively made of rigid material to keep the structure of the crossbow sturdy.

Abstract: A bowstring drawing device for a crossbow has a mounting base, a reeling device and a hook. The mounting base has a rail. The reeling device has a casing with a bottom face and a rail recess defined in the bottom face of the casing to slidably engage with the rail of the mounting base. A wheel assembly is accommodated inside the casing and a crank arm connected to drive the wheel assembly. A clutch is operationally connected to the wheel assembly. The hook is retractably connected to the reeling device by a string. Because the reeling device and the mounting base are engaged with the rail and rail recess, detachment or engagement of the reeling device is convenient. Moreover, the crank arm and the wheel assembly also make the operation of the bowstring drawing device effort-saving.

Abstract: An adjustable cam for a crossbow has a main disk, a weight-adjusting block and a length-adjusting block. The main disk has two sides, a group of string hooks, a group of weight-selecting holes, and a group of length-selecting holes. The group of string hooks is formed on one side of the main disk. The group of weight-selecting holes and the group of length-selecting holes are defined through the main disk in different areas. The weight-adjusting and the length-adjusting blocks are pivotally and coaxially mounted on the other side of the main disk. Each block has a securing hole to engage the one hole in a corresponding group. By attaching a bowstring to different string hooks and engaging the blocks to the corresponding hole in the groups, tension degrees and draw lengths are adjustable in various modifications to make the crossbow have versatile options to satisfy different users.

Abstract: A laser gun for recreation has a body, a laser device, an air start system and a firing device. The body has a barrel with a bottom and a handle is formed at the bottom. The laser device is mounted in the body and has a laser generator that produces and emits a laser beam through a muzzle of the barrel when a laser switch is closed. The air start system provides the compressed air to switch the laser switch on when a trigger of the firing device is squeezed. The compressed air escaping through exhaust holes generates a gunshot like sound and a movement to the laser gun when the laser gun is fired to simulate a real gun.