Lens Module Positioning Posts and Grooves for Bonding Strength
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Solution Overview
Problem
Existing lens modules in portable electronic devices face issues with adhesive overflow and poor bonding strength between the lens unit and the mounting bracket, leading to potential tilting or separation under lateral pressure.
Innovation Solution
The lens module design incorporates positioning posts on the mounting bracket that fit into receiving grooves on the lens unit, enhancing the bonding strength and preventing separation, while also using optically clear adhesive layers to secure components and minimize light interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive is used to connect the lens unit and mounting bracket, then assembly is simplified, but bonding strength is insufficient and separation may occur under lateral pressure
Solution Approach 1:
The patent combines adhesive bonding and mechanical interlocking by integrating positioning posts with receiving grooves into the same connection interface between the lens unit and mounting bracket. The adhesive is applied in the receiving grooves while the positioning posts provide simultaneous mechanical engagement, creating a hybrid connection that leverages both chemical bonding and mechanical interlocking to achieve superior overall strength.
Solution Approach 2:
The connection system uses a composite bonding approach combining adhesive material with mechanical structural elements (positioning posts and receiving grooves). This composite connection method integrates the advantages of both adhesive bonding (chemical adhesion) and mechanical fastening (physical interlocking) to overcome the limitations of adhesive-only connections.
2Ease of manufacture
If adhesive is applied to connect components, then assembly is straightforward, but adhesive may overflow over the mounting bracket
Solution Approach 1:
The patent segments the adhesive application area by providing separate receiving grooves for each positioning post. These grooves act as containment structures that channel and limit adhesive flow to specific zones around the positioning posts, preventing overflow onto surrounding surfaces while maintaining easy assembly procedures.
Solution Approach 2:
The receiving grooves serve as intermediary structures between the adhesive and the mounting bracket surface. They mediate the adhesive's behavior by providing a defined pathway that controls adhesive flow, preventing direct overflow onto the bracket while still allowing the adhesive to fulfill its bonding function.
3Device complexity
If only adhesive is used to connect lens unit and mounting bracket, then device complexity is reduced, but stability under lateral pressure deteriorates
Solution Approach 1:
The patent merges adhesive bonding with mechanical interlocking features (positioning posts and receiving grooves) into a single integrated connection system. This combined approach maintains relative simplicity while significantly improving stability, as the mechanical features provide rigid alignment and resistance to lateral forces while the adhesive provides additional bonding and sealing.
Data Source
AI summary
A lens module with physically stronger foundations and enhanced stability includes a circuit board, an image sensor thereon, a mounting bracket, an optical filter, and a lens unit. The mounting bracket on the circuit board has the image sensor. The optical filter on the mounting bracket is above the image sensor. The lens unit is connected to the mounting bracket facing away from the circuit board by a frame of adhesive. The surface of the mounting bracket facing away from the circuit board has positioning posts at corners of the surface of the mounting bracket. A surface of the lens unit connected to the mounting bracket has receiving grooves positioned at corners of the surface of the lens unit. The positioning posts are inserted into the receiving grooves.