Camera Body Contact Segmentation for Lead Wire Breakage
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Solution Overview
Problem
Existing camera systems face issues with lead wire breakage at soldered portions due to repeated displacement of electric contacts and limited flexibility in lens mount configurations, leading to potential electrical disconnection and restricted miniaturization.
Innovation Solution
A camera body and interchangeable lens unit design featuring a conductive holding member that securely holds electric contacts, allowing them to move between projected and retracted positions without applying load on soldered areas, enabling surface contact and reducing electrical resistance, and allowing for more flexible and miniaturized layouts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lead wire is soldered at the lower end of an electric contact to enable repeated displacement between projected and retracted positions, then electrical connection is established, but the load applied to the soldered portion causes lead wire breakage
Solution Approach 1:
The electric contact is divided into two functional parts: a movable contact portion that projects and retracts for electrical connection, and a fixed base portion that remains stationary and is soldered to the substrate. This segmentation isolates the mechanical displacement stress from the soldered connection, preventing lead wire breakage while maintaining reliable electrical connection.
Solution Approach 2:
A holding member is introduced as an intermediary component between the electric contact and the substrate. The holding member absorbs and bears the mechanical load during displacement, protecting the soldered portion from stress. The holding member acts as a mediator that transfers the displacement function away from the fragile soldered connection.
2Reliability
If lead wires are used to connect electric contacts to the electrical circuit board, then electrical connection is achieved, but the routing of lead wires limits flexibility in the layout of electric contacts
Solution Approach 1:
The lead wire routing constraint is extracted and removed from the system by directly soldering the base portion of the electric contact to the substrate. This eliminates the intermediate lead wire that limited layout flexibility, allowing electric contacts to be positioned freely according to optimal electrical and mechanical design requirements.
3Ease of operation
If the electric contact is displaced repeatedly during attaching and detaching operations, then the interchangeable lens unit can be mounted and removed, but the load on the soldered portion causes wire breakage
Solution Approach 1:
The electric contact structure is segmented into a movable contact portion and a fixed base portion. The movable portion handles the displacement during lens attachment/detachment operations, while the fixed base portion remains stationary and soldered to the substrate. This segmentation protects the soldered connection from repeated mechanical stress, ensuring wire connection durability while maintaining ease of operation.
Solution Approach 2:
The holding member is pre-installed and configured to provide support to the electric contact before any attachment operations occur. This preliminary structural arrangement ensures that when the lens unit is attached and the electric contact needs to displace, the holding member is already in position to bear the load, preventing wire breakage from the outset.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents lead wire breakage and enhances flexibility in electric contact layouts, enabling narrower pitch arrangements and miniaturization of camera components while maintaining reliable electrical connections.
Implementation Method 1
a biasing unit that biases the body-side contact to the projected position
Implementation Method 2
the body-side contact is electrically connected to the holding member
Data Source
AI summary
A camera body that includes a lens attaching unit to which an interchangeable lens unit including a lens-side contact is mountable and that communicates information with the interchangeable lens unit when the interchangeable lens unit is attached to the lens attaching unit, the camera body comprising: a substrate; a holding member fixed to the substrate and formed of a conductive material; a body-side contact that is electrically connected to the lens-side contact when the interchangeable lens unit is mounted to the camera body and that is held by the holding member so as to be movable between a projected position at which the body-side contact projects from the holding member and a retracted position; and a biasing unit that biases the body-side contact to the projected position, wherein the body-side contact is electrically connected to the holding member.