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Checking tool for printed circuit-board

A printed circuit board and tool technology, which is used in electronic circuit testing, parts of electrical measuring instruments, measuring electricity, etc., can solve the problems of reduced strength of plunger 31, insufficient crimping force, and reduced inspection accuracy, and achieves high precision and high Effects of Densified Wiring Circuit Inspection

Inactive Publication Date: 2007-12-19
INOUE SHOJI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, since the outer diameter of the plunger 31 is reduced, the strength of the plunger 31 will be reduced, and at the same time, since the outer diameter of the spring 32 is reduced, it will be difficult for the tip 40 of the plunger 31 to be reliably crimped on the fitting. The crimping force on the line circuit becomes insufficient, poor contact occurs, and the inspection accuracy may be reduced.

Method used

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  • Checking tool for printed circuit-board
  • Checking tool for printed circuit-board
  • Checking tool for printed circuit-board

Examples

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Embodiment Construction

[0024] Embodiments of the present invention will be described below with reference to the drawings. 1 is a longitudinal sectional view showing the structure of the main part of the inspection tool of this embodiment, FIG. 2 is an explanatory diagram showing a partial assembly process of the inspection tool of this embodiment, and FIGS. 3 to 5 are explanatory diagrams showing other examples of plungers. .

[0025] The inspection tool 1 of the present embodiment, as shown in FIG. The spring 4 biased in the forward direction presses the tips 5 of the two plungers 3 to the wiring circuit of the printed circuit board (not shown), and conducts a continuity test between the wirings.

[0026] The plunger 3 is formed of metal to obtain electrical conductivity, and consists of a base 6 connected to the spring 4, an extension 7 extending outward from the tool base 2, and a connection between the extension 7 and the base 6. Section 8 constitutes. The pointed ends 5 formed on the extens...

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Abstract

The testing tool has a pair of insertion stick moving freely and kept on the tool base. The pair of insertion stick through the spring applies force towards foreword direction. Two insertion sticks possess the basal portions connected to the spring, the stretch part extended to the outside of the tool base forming the tips and the connection part. The connection part connects the stretch part to the basal portion, making the interval between stretch part two basal portions less than the interval between two basal portions. The testing tool can make interval between tips of two insertion sticks smaller without changing diameters of the insertion sticks and spring. The tool can test high-density wiring with high accuracy.

Description

technical field [0001] The present invention relates to an inspection tool for a printed circuit board used when inspecting a wiring circuit of a printed circuit board. Background technique [0002] Conventionally, a tool for inspecting wiring circuits of printed circuit boards is known. As shown in FIG. Each plunger 31 is urged in the forward direction by a spring 32 accommodated in the tool base 30 . The plunger 31 and the spring 32 are electrically conductive, and the plunger 31 and the spring 32 are connected in an electrically conductive state. [0003] The tool base 30 has a spring fixing plate 33 for accommodating two springs 32 in an insulated state, and a contact fixing plate 35 overlapping with the spring fixing plate 33 and accommodating a conductive contact 34 in contact with one end of each spring 32 . The contact point 34 is connected to a wire 37 through a connecting sleeve 36, and the wire 37 is connected to a measuring device not shown. In addition, both ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/28G01R31/02G01R1/073
Inventor 井上章菅原和典
Owner INOUE SHOJI KK