Abstract: An improved corner cutting structure, having a knife seat and a base pivotally connected to the knife seat. The knife seat has an inwardly recessed notch and a receiving slot formed on a periphery. The receiving slot provides the support of a blade. The base has a supporting platform and a cutting board. The cutting board and the blade of the knife seat are correspondingly installed with each other, and the supporting platform is placed underneath the notch. Thereby, when a card is disposed on the supporting platform, the knife seat is pressed rotating to move the blade downward, so as to cut the corner of the card.

Abstract: A foldable table includes a table top, two pairs of boards pivotally secured to a bottom surface of the table top and foldable toward or away from the bottom surface of the table top, and arranged in a parallelogramic structure having four corner areas to receive four brackets. The brackets are secured to the boards, to secure and retain the boards at an open position, and a support device is secured to the brackets. The boards may be folded to a compact folding or storing structure, for allowing the game table to be easily transported by the users, and to be easily assembled together by the users themselves.

Abstract: A paintball gun conveniently assembled in the present invention has a through hole formed in a back of a grip and communicated with a chamber of the grip; a set bolt having an engagement groove and being extended into the through hole, protruded into the chamber and pressed against a magnetic-attraction plate; a setscrew hole formed in one sidewall of the grip and communicated with the through hole for being screwed with a setscrew, whereby the set bolt designed with different length can be extended into the through hole to push the magnetic-attraction plate, and then screwed with the setscrew tightly so that a push rod of the magnetic-attraction plate can push a locking member to adjust the displacement height of the locking member for different types of the gun bodies, thus a single grip is suited for being conveniently and quickly assembled with a gun body of different style.

Abstract: A paintball gun in the present invention is provided with a screw hole formed in a back of a grip and extended through a chamber for being screwed with an adjusting screw whose inner end is protruded into the chamber and pressed against one sidewall surface of a magnetic-attraction plate, by which the adjusting screw is capable of being adjusted to make an inner end of the adjusting screw push the magnetic-attraction plate slightly forward or backward so that a lower end of a locking member is pushed by an outer end of a push rod of the magnetic-attraction plate to adjust the displacement height of the locking member for being fitted with different types of said gun bodies, and thus a single said grip is suited for being assembled with a gun body of different style to decrease the manufacturing of gun bodies with varied styles and lower the production cost.

Abstract: A golf practice device includes an inclined elongated base having a plurality of golf balls contained therein. An inlet hole is laterally defined in the base. A gate operating mechanism is mounted in the base and operates to stop the plurality of golf balls and to allow the plurality of golf balls to pass therethrough. An elongated plate is mounted on the base and an artificial sod covers the elongated plate. A socket is defined through the artificial sod and communicates with a passage defined in the base. A pivot member is pivotally mounted on the elongated plate for transporting the golf balls from the inlet hole of the base to the artificial sod of the elongated plate.