131results about How to "Lock tightly" patented technology

A throwing wheel assembly including a wheel and a series of throwing blades mounted in radial channels in the wheel formed with mating dovetail wing portions on the slot sides and a projecting at the base of the blade. A sloping grove in the bottom of each channel engages a projecting ramp feature on the base of the mating blade received therein to cam the blade outwardly and thereby create a tight fit of the dovetail portions and to lock the blades in position.

A fastening device is used for fastening a fastened object on a circuit board. The fastening device includes a fastening part for fastening the fastened object. The fastening part includes a main body portion. The main body portion extends to form a wedging portion. An end of the wedging portion extends to form a buckling portion. The fastening device also includes a tightly-locking part that fits with the fastening part. One end of the tightly-locking part passes through the main body portion of the fastening part and is positioned on the positioning hole of the circuit board. The second end of the tightly-locking part fits with the buckling portion to tightly lock the fastened object. The fastening device of the present invention merely includes the fastening part and the tightly-locking part. Its structure is simple, and the required space is small.

The invention discloses a conveniently installed billboard device, which comprises a mounting base body and a billboard. The first sliding cavity and the second sliding cavity are symmetrically arranged up and down. The mounting base between the first sliding cavity and the second sliding cavity is provided with an unlocking sliding cavity. The left bottom of the first sliding cavity and the left top of the second sliding cavity There is a connecting groove running through the unlocking sliding chamber between them, and the bottom of the right side of the first sliding chamber and the second sliding chamber is provided with a locking groove extending downward, and the locking groove is provided with an engaging groove set through the locking groove and extends to the left and right. The side extension is set, the top pressure slider is slidably connected in the joint groove, the guide chute is symmetrically arranged up and down in the extension section on the left side of the joint groove, and the left edge of the top pressure slider is symmetrically provided with protrusions extending into the guide chute. The sliding part, the extension section on the right side of the engaging groove runs through the mounting base body and communicates with the connecting groove; the invention has simple structure, saves time and effort in installation, and is convenient for maintenance.

A circuit card locking device (30) at a rear cover of a computer, is composed of a computer casing (10), a rear side of which is connected with a rear cover (20) which is provided with a rectangular hole (22) and a projection piece (24) that is formed with a tab (241); a locking device (30), which tightly lock and fix a straight metallic piece (82) of a circuit card (80) at a periphery of the rectangular hole (22) of the rear cover (20). The locking device (30) has a body (3) that may be rotated from a retracted position in which it is securely held to a position in which an elastic tongue (35) of the body (3) presses on the metallic piece (82) of the circuit card (80) to urge it toward the projection piece (24) and to cause the tab (241) to lock into an indentation (821) in the metallic piece (82). Accordingly, the straight metallic piece (82) at a rear end of the circuit card (80) can be tightly locked on the rear cover (20) without using screws, and can be quickly released from the rear cover (20).

A table includes legs, each of which includes a tube and a long screw rod passing through the tube. The tube has a limit step at a first end. The long screw rod has a protruding step at the first end and a screw at a second end. The table also has a tabletop with screw holes. Each screw hole is for receiving the screw of the long screw rod. The screw is lock-connected with the screw hole when the legs are perpendicularly joined to the tabletop at the second end. The protruding step of the long screw rod engages the limit step of the tube.

The invention discloses a sliding door hook lock. The sliding door hook lock comprises a lock shell, a lock hook and a lock hook transmission mechanism, wherein the lock hook and the lock hook transmission mechanism are arranged inside the lock shell. The lock hook is connected with the lock hook transmission mechanism. The lock hook comprises a first lock hook body and a second lock hook body which are symmetrically arranged. An adjusting mechanism for adjusting the installing position of the lock hook is arranged inside the lock shell, and in the process of unlocking or locking, the movement direction of the first lock hook body and the movement direction of the second lock hook body are opposite through the driving of the lock hook transmission mechanism. The sliding door hook lock is of a double-hook structure. The lock hook comprises the first lock hook body and the second lock hook body which are symmetrically arranged, locking can be carried out from two directions, locking is firm, and a sliding door cannot unhook easily even when subjected to the external force. The adjusting mechanism for adjusting the installing position of the lock hook is arranged inside the lock shell, the installing position of the lock hook can be adjusted in the process of installing, the lock hook can be optimally matched with a lock plate installed on a door frame, and the lock hook can be closely combined with the lock plate after locking. Therefore, the sliding door hook lock is good in safety and reliable in locking.