After-loading bridge-wire protective sleeve

Abstract

The invention discloses an after-loading bridge-wire protective sleeve. The after-loading bridge-wire protective sleeve comprises a housing and two pairs of metal sheets. The housing has two open ends, wherein one of the open ends is sleeved on a circuit board and the other is utilized for bridge-wire coating. Two of each pair of the metal sheets are respectively arranged at corresponding positions of upper and lower inner surfaces of the housing. One end of each one of the metal sheets is connected to the inner surface of the housing and the other end of the one is provided with a reverse bayonet for locking the circuit board. The circuit board is provided with holes corresponding to the reverse bayonets. The metal sheets are elastic. The distance between the two of each one pair of the metal sheets is less than the thickness of the circuit board. When the housing is sleeved on the circuit board, two pairs of the metal sheets are expanded so that the reverse bayonets are pushed into the holes of the circuit board.

Description

technical field [0001] The invention relates to the technical field of pyrotechnics, in particular to a protective sleeve for aftercharged bridge wires. Background technique [0002] The digital electronic detonator includes shell 1, circuit board 2, bridge wire 3, foot wire 4, plug 5, etc., and its positional relationship is attached figure 1 . The shell is generally a metal shell with a circuit board inside. The circuit board is welded with a control chip, a protection circuit composed of electronic components, an energy storage circuit, an ignition circuit, and an auxiliary circuit. At the end, the bridge wire is welded on the circuit board through the wire, and the foot wire extends through the plug to the outside of the shell. [0003] The production of digital electronic detonators includes multiple processes. Only after the bridge wire welding is completed, it must go through multiple processes such as testing, coating, and assembly. The industrial production proce...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the bridge wire is easily damaged during production and transportation, the present invention provides a protective cover for the post-loaded bridge wire. The protective cover includes a shell and a metal sheet; On the circuit board, the other end is open for bridge wire application; the metal sheets have two pairs, and the two metal sheets of each pair are respectively located at the corresponding positions on the upper and lower inner surfaces of the casing; one end of the metal sheets is connected to the inner surface of the casing , the other end has barbs for clamping the circuit board; the circuit board has a hole corresponding to the position of the barb; the metal sheet is elastic; the distance between the paired metal sheets is less than the thickness of the circuit board , when the shell is set on the circuit board, the paired metal sheets are stretched apart, and the barb is pushed into the hole on the circuit board

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