Simple tool for quickly and accurately correcting contact pin
By designing a simple tool for quick and accurate calibration of the pins, the problems of low efficiency and poor accuracy in calibrating the pins of electric detonators were solved, achieving efficient and low-cost pin calibration results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA ORDNANCE IND NO 213 RES INST
- Filing Date
- 2025-06-09
- Publication Date
- 2026-05-01
AI Technical Summary
In the existing technology, the calibration efficiency of the electric detonator pin is low and the accuracy is poor. It relies on manual operation and the accuracy depends on the operator's skill level, which affects the assembly efficiency.
A simple tool for quickly and accurately calibrating inserts was designed, including a main body, lugs, and calibration holes. The lugs are located on both sides, and there are four calibration holes on one end face of the main body that correspond one-to-one with the inserts. The gap between the calibration holes is no more than 0.05mm, which is used to guide the insertion pin calibration.
It significantly improves the efficiency and accuracy of electric detonator pin calibration, and has a simple structure, low cost, and easy operation.
Smart Images

Figure CN224189098U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tooling and fixture technology, specifically relating to a simple tool for quickly and accurately calibrating inserts. Background Technology
[0002] Electric detonators are commonly used unit pyrotechnics in aerospace, primarily used to ignite or detonate subsequent explosive charges in complete explosive devices. After assembly, the electric detonator's input terminal must be connected to the corresponding plug. For safety reasons, the electric detonator is equipped with a short-circuit device, which must be removed before connecting to the plug. However, removing the short-circuit device may cause slight deformation of the electric detonator's pins (or electrodes), potentially preventing the electrical connector from being properly inserted. Currently, there are no dedicated calibration tools for the electric detonator pins; assembly of the electric detonator and plug primarily relies on manual operation. If assembly difficulties arise, manual calibration using tools such as tweezers is typically employed, and the accuracy of this calibration depends heavily on the operator's skill level.
[0003] Therefore, the low calibration efficiency and poor calibration accuracy severely affect the assembly efficiency of electric detonators, necessitating the development of a simple tool for calibrating the pins of these detonators. This invention provides a dedicated, simple calibration tool. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] The technical problem to be solved by this invention is: how to quickly calibrate the pins of an electric detonator.
[0006] (II) Technical Solution
[0007] To solve the above-mentioned technical problems, this utility model provides a simple tool for quickly and accurately calibrating the pin, including a main body, with lugs on both sides of the main body, and four calibration holes on one end face of the main body, the positions of the calibration holes corresponding one-to-one with the pins of the detonator; the main body is also provided with a boss corresponding to the groove of the input end of the detonator; the calibration holes are provided with arc surfaces for guiding the pins of the detonator into the corresponding calibration holes.
[0008] Furthermore, the calibration hole is fitted with the insertion pin with a clearance.
[0009] Furthermore, the gap between the calibration hole and the pin is no greater than 0.05mm.
[0010] (III) Beneficial Effects
[0011] Compared with the prior art, the present invention has the following advantages: the tool has a simple structure, low cost and simple operation, and can significantly improve the efficiency and accuracy of the pin calibration of the electric detonator. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of a simple tool for calibrating the detonator pin of this utility model.
[0013] Figure 2 This is a schematic diagram of the form of the input end of the detonator of this utility model.
[0014] Figure 3 This is a three-dimensional diagram of a simple tool for calibrating the detonator pin of this utility model. Detailed Implementation
[0015] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.
[0016] As attached Figure 1 , Figure 2 As shown, this utility model provides a simple tool for quickly and accurately calibrating the pins of a certain type of electric detonator. It includes a first lug 1, a second lug 3, a first calibration hole 4, a second calibration hole 5, a third calibration hole 6, and a fourth calibration hole 7. The calibration holes are provided with a large arc surface and are positioned by a boss 2 and a groove 12 at the input end of the detonator. The first calibration hole 4, the second calibration hole 5, the third calibration hole 6, and the fourth calibration hole 7 cooperate with the first calibration pin 9, the second calibration pin 8, the third calibration pin 11, and the fourth calibration pin of the detonator. Since the calibration holes have suitable arc surfaces, the simple tool for calibrating the pins can be inserted into the input end of the detonator to achieve the calibration of the pins.
[0017] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A simple tool for quickly and accurately calibrating inserts, characterized in that, The device includes a main body with lugs on both sides and four calibration holes on one end face, the positions of which correspond one-to-one with the pins of the detonator. The main body also has a boss corresponding to the groove at the input end of the detonator. The calibration holes are provided with arc surfaces to guide the pins of the detonator into the corresponding calibration holes.
2. The simple tool for quickly and accurately calibrating inserts as described in claim 1, characterized in that, The calibration hole is fitted with the insertion pin with a clearance.
3. The simple tool for quickly and accurately calibrating inserts as described in claim 1, characterized in that, The gap between the calibration hole and the pin should not exceed 0.05mm.