Abstract: An escape-prevention arrow includes an arrow body, a hook and a restraining wire. The arrow body has two ends and a buckling part, and the two ends are an arrow tail and an arrowhead respectively. The buckling pan is disposed near the arrowhead. The hook is disposed on the buckling part and can be separated from the arrow body when being impacted. The restraining wire is connected between the hook and the arrow body. When the arrow formed by the configuration of the arrow body, the hook and the restraining wire hits an animal, the hook is able to hook a tree, so as to restrain the animal from escaping. In this way, a hunter may have enough time to knife the animal, so as to quickly kill the animal to reduce its pain, thereby greatly solving the problem that the killing efficiency of bow is insufficient.

Abstract: A trigger of a crossbow includes a trigger guard including an inner periphery. A trigger is pivotably located within the trigger guard. The trigger includes a space defined in the rear face thereof. A switch member includes a body portion, and an operation section and a contact section are respectively formed on two ends of the body portion. The body portion is pivotably connected in the space. A resilient member is biased between the contact section and the inner end of the space. The contact section is pushed by the resilient member to contact the inner periphery of the trigger guard to restrict the trigger from being pulled. When the operation section is pulled, the switch member is pivoted and the contact section compresses the resilient member. The contact section is moved away from the inner periphery of the trigger guard such that the trigger is able to be pulled.

Abstract: A crossbow includes a barrel having a flight section and a head. The head includes a main part and two extensions extending laterally from the main part. The main part is detachably connected to the flight section. Two cam units each include two first limb connected to the two extensions, and two cams. Two second limbs each are a curved limb and have a first end and a second end. The two first ends of the two second limbs are respectively and directly connected to two sides of the flight section or the head. A first string is wrapped around and connected between the two cams. Two second strings are connected between the cams and the second end of the second limbs. The weight center of the crossbow is located close to the user's body and is benefit for operating the crossbow with high balance and accuracy.

Abstract: A crossbow includes a magazine mounted to the top of the barrel of the crossbow and located above the flight groove of the crossbow. A storage space is formed through the magazine so as to accommodate multiple arrows therein. A retainer is located in the storage space, and resiliently normally presses the arrows in the storage space so that the users shoots the arrows one by one. The retainer is a resilient and an elongate part, an elongate plate cooperated with a spring, or a block cooperated with multiple springs. The retainer can be pulled or pivoted upward to allow the arrows to be fed into the storage space.

Abstract: A crossbow includes a magazine mounted to the top of the crossbow and the magazine includes a storage space defined through the top and the bottom top of the magazine, and the storage space communicates with the flight rail of the crossbow. Multiple arrows are loaded in the storage space. The magazine includes two first engaging members which are removably engaged with two second engaging members formed on the top of the crossbow. Two protrusion respectively extend inward from two inside walls of the storage space to restrict and guide this arrows in the storage space. A retainer has a first end thereof connected to the magazine and a resilient member is located in the storage space and biases between the retainer and the inside of the storage space such that the retainer normally pressing the arrows in the storage space.

Abstract: A simulation laser training cartridge for dry-firing practice adapts to the wear condition of a given firearm and provides a convenient way of measuring the barrel erosion. The cartridge uses multiple adjustable interfacing parts that can be applied selectively and independently according to the condition of the barrel to ensure a snug fit in 3-dimensions. In a 2-unit kit embodiment of the invention, the muzzle unit can work with multiple chamber units for a multi-chamber firearm. The cartridge also includes internal modules for laser property management, status monitoring, movement tracking, memory, and communication to help a user manage the device and allow for advanced training applications. By changing the laser property, the laser training cartridge can work as a bore sight. The cartridge may further include a means to attach an external part, so the external part comprises a means to distinguish a longitudinal position inside said barrel.

Abstract: An arrow feeding device for a crossbow includes a magazine mounted to the flight groove of the crossbow. A storage space is formed through the magazine so as to accommodate multiple arrows therein. A retainer is located in the storage space, and resiliently normally presses the arrows in the storage space so that the users shoots the arrows one by one. The retainer is a resilient and an elongate part, an elongate plate cooperated with a spring, or a block cooperated with multiple springs. The retainer can be pulled or pivoted upward to allow the arrows to be fed into the storage space.

Abstract: An arrow feeding device for a crossbow includes a magazine mounted to the crossbow and includes a storage space which opens through the magazine from the top to the open bottom of the magazine. Multiple arrows are loaded in the storage space. A retainer is pivotably connected to the magazine and normally presses the arrows in the storage space so that the lowest arrow of the arrows in the storage space is fed into the barrel of the crossbow in sequence. The users shoot the arrow without repeatedly lowering the crossbow and loading the arrows.

Abstract: A crossbow includes a barrel with a flight groove, and a bow. A magazine is mounted to the body and located above the flight groove. A passage is defined through the magazine for accommodating multiple arrows therein. A slot is formed between the magazine and the flight groove. A string of the bow movably extends through the slot. An arm is pivotably located in the passage and includes a hook end which normally presses on a top-most arrow of the arrows in the magazine. When no arrow is in the magazine, the hook end is inserted into the slot and the user cannot successfully cock the string because the string is stopped by the hook end, so that the user is acknowledged that there is no arrow in the magazine.

Abstract: A safety device for a crossbow includes a control box connected to the shooting device of the crossbow. The control box includes a case, an operation assembly and a pivotal member. The operation assembly is located in the case and the operated is operated to be a string-cocked mode. An activation member is pivotably connected to the case and located beneath the operation assembly. The activation member includes a stop which is located in the box. When the operation assembly is operated to the string-cocked mode, the string cocked and no arrow is loaded. The operation assembly does not restrict the activation member. The stop is restricted by the pivotal member so that the activation member cannot be pivoted, and the trigger cannot be pulled.

Abstract: A crossbow includes a body, a grip portion, an aim device rack, a stock connected to the rear end of the body, and two support devices connected to two sides of the front end of the body. Each support device includes an inclined face including a low end is located corresponding to the aim device rack, and a high end located corresponding to the grip portion. A link is connected between the two support devices. A base is connected to the link. Two support legs angularly extend from the base. The crossbow can be operated in a prone position. The crossbow can be positioned between a first position where the two high ends contact the ground, and a second position where both of the high end and the low end of each of the two inclined faces contact the ground. The crossbow does not fall in first and second positions.

Abstract: A crossbow includes a body, a grip portion, an aim device rack, a stock connected to the rear end of the body, and two support devices connected to two sides of the front end of the body. Each support device includes a first block and a second block. The first block is fixed to the body. The second block is pivotably connected to the first block. Two plates are connected to the second block. Each plate includes a curved slot. Two bolts movably extend through the two curved slots and the first block so that the second blocks are pivotable relative to the first blocks. Each second block includes an inclined face including a low end is located corresponding to the aim device rack, and a high end located corresponding to the grip portion. The crossbow is positioned between a first position and a second position with a weight balance.

Abstract: A crossbow includes a body, a grip portion, an aim device rack, a stock connected to the rear end of the body, and two support devices connected to two sides of the front end of the body. Each support device includes an inclined face including a low end is located corresponding to the aim device rack, and a high end located corresponding to the grip portion. The crossbow can be positioned between a first position where the two respective high ends contact the ground and an angle is formed between the inclined face of each support device and the ground, and a second position where both of the high end and the low end of each of the two inclined faces contact the ground. When the body changes from the first position to the second position, the grip portion and the aim device rack reach a weight balance.

Abstract: A crossbow includes a body, a grip portion, an aim device rack, a stock connected to the rear end of the body, and two support devices connected to two sides of the front end of the body. Each support device includes an inclined face including a low end is located corresponding to the aim device rack, and a high end located corresponding to the grip portion. A link is connected between the two support devices. A base is connected to the link. Two support legs angularly extend from the base. The crossbow can be operated in a prone position. The crossbow can be positioned between a first position where the two high ends contact the ground, and a second position where both of the high end and the low end of each of the two inclined faces contact the ground. The crossbow does not fall in first and second positions.

Abstract: A method of forming a semiconductor device includes the following operations. A substrate is provided with a device and an insulating layer disposed over the device. A silicon-containing heterocyclic compound precursor and a first oxygen-containing compound precursor are introduced to the substrate, so as to form a zeroth dielectric layer on the insulating layer. A zeroth metal layer is formed in the zeroth dielectric layer. A silicon-containing linear compound precursor and a second oxygen-containing compound precursor are introduced to the substrate to form a first dielectric layer on the zeroth dielectric layer. A first metal layer is formed in the first dielectric layer.

Abstract: A cocking device for a crossbow includes a cocking unit which is pivotably connected to the body of the crossbow, and has a cocking unit which is detachably engaged with a holding unit connected to the grip of the crossbow by the locking unit. The cocking unit includes an opening located next to the locking unit. A scrolling unit is accommodated in the cocking unit and includes a scrolling member, an axle, a ratchet disk and a stop. The scrolling member driving the axle which drives the ratchet disk. The stop is located corresponding to the opening. The stop has the first end thereof normally engaged with one of ratchets of the ratchet disk. The second end of the stop extends through the opening. The stop is pivotable to engage with the ratchet disk or to release the ratchet disk to control the operation of the scrolling member.

Abstract: A crossbow includes a barrel, a cocking device, a bow device, a link device and a cartridge. The retention member is moved by the operation of the string of the bow device. The cocking device detachably holds the string. By repeatedly operating the link device and pulling the trigger, the cocking device is moved back and forth repeatedly, and the retention member moves back and forth to control the restriction member to pivot so that the bullets continuously drop to the groove and located in front of the retention member. Therefore, the crossbow can shoot the bullets continuously. The bullets are allowed to be fed into the cartridge one time of feeding.

Abstract: A limb and string pack for a crossbow includes a base which is installed to an installation recess in the front end of the barrel of the crossbow. The base includes a passage. Two links respectively extend from the base and beyond the two end openings and toward the front end of the barrel. Two limbs are connected to the two links. Two cams are respectively and pivotably connected to the two limbs. A string is connected between the two cams. Two cables respectively extend through the passage of the base and are connected to the limbs and the cams. A bolt secure the base to the links and the barrel. Another bolt secures the links to the front end of the barrel of the crossbow. The base, the links and the limbs are easily removed by unscrewing the two bolts to maintain the strings and the cables.

Abstract: A simulation laser training cartridge for dry-firing practice adapts to the wear condition of a given firearm and provides a convenient way of measuring the barrel erosion. The cartridge uses multiple adjustable interfacing parts that can be applied selectively and independently according to the condition of the barrel to ensure a snug fit in 3-dimensions. In a 2-unit kit embodiment of the invention, the muzzle unit can work with multiple chamber units for a multi-chamber firearm. The cartridge also includes internal modules for laser property management, status monitoring, movement tracking, memory, and communication to help a user manage the device and allow for advanced training applications. By changing the laser property, the laser training cartridge can work as a bore sight. The cartridge may further include a means to attach an external part, so the external part comprises a means to distinguish a longitudinal position inside said barrel.