Battery Holder Insulator for Reverse Connection Prevention
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Solution Overview
Problem
Existing battery-driven object detection devices face issues with reverse connection, which can prevent normal operation and damage the electric circuit, especially when using batteries with low-projection positive electrodes or those covered with outer members, limiting the types of usable batteries due to contact failure.
Innovation Solution
A reverse connection preventing structure using a printed circuit board with thin insulating members around positive electrode contact terminals, allowing correct contact with batteries having low-projection positive electrodes while preventing contact with negative electrodes during reverse mounting, ensuring power supply and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin insulator with thickness of 0.5 to 0.6 mm is used to prevent reverse connection, then reverse connection prevention is achieved, but contact failure occurs with batteries having positive electrode projection height less than 0.5 mm
Solution Approach 1:
The patent changes the key parameter of insulator thickness from the conventional 0.5-0.6 mm to a thinner range of 0.05-0.3 mm. This parameter change allows the insulator to accommodate batteries with positive electrode projection heights of 0.1 mm or more while still providing reverse connection prevention, thereby resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The patent applies local quality by positioning the thin insulator specifically around the positive electrode contact terminal where it is needed for reverse connection prevention, rather than using a thick insulator throughout the entire battery holder structure. This localized approach maintains protection functionality while enabling compatibility with low-projection batteries.
2Volume of moving object
If the positive electrode projection height is reduced to less than 0.5 mm, then battery size can be reduced, but contact failure occurs with conventional insulator thickness
Solution Approach 1:
The patent changes the insulator thickness parameter to 0.05-0.3 mm, which is compatible with reduced positive electrode projection heights. This allows batteries to be miniaturized while maintaining reliable contact, as the thinner insulator does not prevent contact between the reduced-height positive electrode and the contact terminal.
3Reliability
If a resin insulator is used to prevent reverse connection, then reverse connection is prevented, but the structure becomes more complex
Solution Approach 1:
The patent employs a thin film insulator with thickness of 0.05-0.3 mm that can be integrated into the battery holder structure. This thin film approach prevents reverse connection while adding minimal structural complexity, unlike thicker rigid insulators that would require more complex mounting and integration.
Data Source
AI summary
Provided is a reverse connection preventing structure in a battery-driven object detection device, which has a simple structure capable of preventing reverse connection of even a battery whose projecting positive electrode is relatively lower in height. The structure has a holder for holding the battery including a first terminal for electrically connecting to a projecting positive electrode and a second terminal for electrically connecting to a negative electrode. The first terminal is formed in a printed circuit board. On the printed circuit board, an insulating member of less than 0.5 mm in thickness are provided around the circumference of the first terminal in such a manner as to allow the first terminal to come in contact with the positive electrode of the battery which is mounted correctly and as to prevent the first terminal from coming in contact with the negative electrode of the battery which is mounted reversely.