Abstract: A valve mechanism for a high-pressure spray can has a switching base, a first ball, and a second ball. The switching base has a first passage, a first suction port, a second passage, and a second suction port. The first passage has a first inclined inner wall surface. The first inclined inner wall surface extends obliquely toward a specific side from the top end to the bottom end of the first passage. The second passage has a second inclined inner wall surface. The second inclined inner wall surface extends obliquely toward the specific side from the bottom end to the top end of the second passage. The first ball and the second ball are respectively mounted in the first passage and the second passage and move along the first inclined inner wall surface and the second inclined inner wall surface to block the first suction port and the second suction port.

Abstract: An aerosol spray can has a can body, a valve assembly, a dip-tube assembly and a rigid tube. The valve assembly is mounted on the can body. The dip-tube assembly is connected to the valve assembly and has a head end channel-linked to the valve assembly. The dip-tube assembly has a flexible tube and a weight piece. The two ends of the flexible tube are connected to the valve assembly and the weight piece respectively. The rigid tube is sleeved around the flexible tube to constrain excessive bending of the flexible tube. The flexible tube protrudes from the rigid tube. The weight of the weight piece drives the tail end freely toward the ground. Therefore, the tail end stays submerged under a liquid product when less than a half of the liquid product is left inside the can body even when the can body is tilted or horizontal.

Abstract: An aerosol spray can has a can body, a valve assembly, a dip-tube assembly and a rigid tube. The valve assembly is mounted on the can body. The dip-tube assembly is connected to the valve assembly and has a head end channel-linked to the valve assembly. The dip-tube assembly has a flexible tube and a weight piece. The two ends of the flexible tube are connected to the valve assembly and the weight piece respectively. The rigid tube is sleeved around the flexible tube to constrain excessive bending of the flexible tube. The flexible tube protrudes from the rigid tube. The weight of the weight piece drives the tail end freely toward the ground. Therefore, the tail end stays submerged under a liquid product when less than a half of the liquid product is left inside the can body even when the can body is tilted or horizontal.

Abstract: An interchangeable self-defense device has two self-defense devices and two modular housings, the two self-defense devices are respectively mounted in the two modular housings, and each one of the two modular housings has a mounting structure formed on a side surface of the housing. The two mounting structures of the two modular housings can detachably interlock with each other. With the interchangeable self-defense device, the user may conveniently hold the two self-defense devices together as one piece, and also can quickly switch functions from one self-defense device to another: therefore the user may optimize the defensive strategy to cope with different situations.

Abstract: An interchangeable self-defense device has two self-defense devices and two modular housings, the two self-defense devices are respectively mounted in the two modular housings, and each one of the two modular housings has a mounting structure formed on a side surface of the housing. The two mounting structures of the two modular housings can detachably interlock with each other. With the interchangeable self-defense device, the user may conveniently hold the two self-defense devices together as one piece, and also can quickly switch functions from one self-defense device to another: therefore the user may optimize the defensive strategy to cope with different situations.

Abstract: A security alarm with a wired remote triggering device consists of a triggering switch with two spring blades and a flexible sleeve tube holding both spring blades together. The security alarm with a strap is hung on the doorknob inside a door or placed inside a drawer, and the triggering device is set up from outside of the door or the drawer by pulling off the flexible sleeve tube. The two spring blades will thus be clipped in a gap between the door and its frame to keep the alarm circuitry open. When any unauthorized person opens the door or the drawer, the triggering device will fall off from the gap; thus the two spring blades will automatically open to keep the alarm circuitry in close status so as to activate the alarm, so the theft deterrent purpose is consequently achieve.

Abstract: An electric discharging personal safety device includes a main body and a plurality of spaced electrodes covered with respective coverings. Each of the coverings has a plurality of holes defined therein for discharge of electricity therethrough, and is colored to match the main body whereby the personal safety device is disguised to prevent an attacker being forewarned of the punishment available from the device.

Abstract: An electric discharging personal safety device includes a main body and a plurality of spaced electrodes covered with respective coverings. Each of the coverings has a plurality of holes defined therein for discharge of electricity therethrough, and is colored to match the main body whereby the personal safety device is disguised to prevent an attacker being forewarned of the punishment available from the device.

Abstract: A self-defense device includes a flash light and a tear-gas dispenser. The flash light includes a head, a first cylinder connected with the head, a second cylinder connected with the first cylinder, and a reflector receivable in the head and a pipe formed through the reflector. The funnel includes a conical portion and a tubular portion. The funnel is receivable in the first cylinder. A flexible tube is connected between the tubular portion of the funnel and the pipe. A bottle includes a nipple. Tear gas will exit from the bottle through the nipple if the nipple is pressed. The bottle is receivable in the first cylinder while the nipple is insertable in the conical portion of the funnel. A first bottle-driving element includes a piston and two plates projecting from the piston. Each of the plates of the first bottle-driving element includes an inclined edge. The first bottle-driving element is receivable in the first cylinder so that the piston thereof is in contact with the bottle.