39results about How to "Prevent accidental explosion" patented technology

The invention discloses a timing initiation device and method. The device comprises a shell; the shell is provided with a key, a display screen, a mechanical fuse and an electric detonator socket connected with an electric detonator; a microcontroller electrically connected with the key and the display screen and an initiation circuit electrically connected with the microcontroller are mounted inthe shell; a common end of a single-pole double-throw switch is electrically connected with the electric detonator socket, a normally closed end is grounded, and a normally open end is electrically connected with the initiation circuit; a poking piece of the single-pole double-throw switch is defaulted to communicate with the common end and the normally closed end; under the condition of relievingthe mechanical fuse, the poking piece communicates with the common end and the normally open end; and a battery supplies electricity to the device through a power supply management module. The timinginitiation device is small in size, low in weight, simple in operation, high in automation degree and convenient to carry; users can autonomously set the timing time; and the electric detonator is initiated to realize initiation after timing.

The invention provides a method and device for ensuring in-chamber safety of small-caliber ammunition. The method comprises the steps that a the device used for ensuring the in-chamber safety is arranged in a small-caliber ammunition fuse, the device acts under the action of in-chamber recoil force in the shooting process for preventing a fuse isolating mechanism from moving, and then the fuse isolating mechanism is made in an isolated state; and after the ammunition is out of the chamber, the device is reset, and a restriction on the fuse isolating mechanism is removed. The device comprises a base, a limiting body, a safety pin, an elastic part, a containing groove, a first locating hole and a second locating hole, wherein a fastening part is arranged at one end of the containing groove, the elastic part enables the safety pin to be located in the containing groove or the containing groove and the first locating hole at ordinary times, and the safety pin compresses the elastic part to move under the action of the in-chamber recoil force to enable the first locating hole to be fixedly connected with the second locating hole in an inserted manner in the shooting process. According to the method and device for ensuring the in-chamber safety of the small-caliber ammunition, it is guaranteed that isolation cannot be removed through the fuse isolating mechanism in the chamber, and therefore an in-chamber explosion is avoided, and the in-chamber safety in the shooting process is guaranteed.

The invention discloses an automobile safety belt retractor installation structure and belongs to the technical field of automobile body accessories. The automobile safety belt retractor installation structure comprises a safety belt retractor support and safety belt retractor support reinforcing plates. The safety belt retractor support, the safety belt retractor support reinforcing plates and an automobile body B-pillar inner plate are connected together through three-layer welding spots. The safety belt retractor support and the automobile body B-pillar inner plate are further fixedly connected through other two-layer welding spots. The safety belt retractor support reinforcing plate and an automobile body B-pillar inner plate reinforcing plate are fixedly connected through other two-layer welding spots. The automobile safety belt retractor installation structure has the advantages of being simple in structure, low in cost, convenient to install and beneficial to engineered mass production; in addition, the automobile safety belt retractor installation structure meets installation requirements of an automobile safety belt retractor, improves rigidity of the safety belt retractor support, avoids the phenomenon of sudden spontaneous firing of side air bags and improves safety in automobile driving.

The invention discloses a child safety seat which comprises a passive protection device, two controllers, a wire and a control circuit unit, wherein the two ends of the wire are connected with the twocontrollers respectively, and the two ends of the control circuit unit are connected with the two controllers respectively. The passive protection device comprises a triggered device, and the two ends of the triggered device are detachably connected with the two controllers respectively. Each controller has a first working state and a second working state which can be switched with each other. When the two controllers are both in the first working state, the two ends of the wire are connected with the two ends of the triggered device through the two controllers respectively, and the passive protection device is in a closed state; and when the two controllers are both in the second working state, the two controllers enable the two ends of the wire to be disconnected from the two ends of the triggered device respectively, the two ends of the control circuit unit are connected with the two ends of the triggered device through the two controllers respectively, and the passive protection device is in a to-be-triggered state.