Projector Lens Mount With Radial Socket Contact for Heavy Lenses

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Solution Overview

Problem

Existing lens mounting technologies face issues such as inconvenient mounting operations, high contact failure rates, and increased costs due to large socket volumes and deformations, particularly for heavy lenses.

Innovation Solution

A lens mounting apparatus with an annular frame that rotates to fix the lens, utilizing elastic members to ensure proper contact and prevent deformation, allowing for a smaller socket design and improved operability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the lens is rotated after insertion to electrically connect the lens contact and socket contact, then the electrical connection is improved and mounting errors are prevented, but the mounting operation becomes inconvenient and the lens cannot be firmly fixed, especially for heavy lenses

Engineering Contradiction:
Improveelectrical connection reliabilityVSAvoidmounting operation convenience
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The socket is preliminarily positioned at the center of the annular frame before lens insertion, and the electrical connection is pre-established through the elastic member's urging force. The lens is inserted first without rotation, and the electrical connection is already in place, eliminating the need for post-insertion rotation operations.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

Instead of rotating the lens after insertion to achieve electrical connection (conventional approach), the invention inverts the sequence by establishing electrical connection through the socket's radial movement before or during insertion, eliminating the need for lens rotation and improving mounting convenience.

Inventive Principle:
Principle #13The other way round (Inversion)

2Reliability

If the socket is made large to ensure stable electrical connection, then the contact reliability is improved, but the installation space of the lens mount becomes narrow and the cost increases

Engineering Contradiction:
Improvecontact reliabilityVSAvoidlens mount installation space
Core Design Contradiction:
ReliabilityVSArea of stationary object

Solution Approach 1:

The socket is designed to move radially dynamically within the annular frame under the urging force of the elastic member. This dynamic positioning allows the socket to maintain reliable electrical contact with the lens connection part without requiring a large fixed socket structure, thereby saving installation space and reducing costs.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention changes the parameter of socket position from fixed to movable, allowing the socket to adjust its radial position dynamically. This parameter change enables the socket to achieve reliable contact without increasing its size, thus resolving the contradiction between contact reliability and installation space.

Inventive Principle:
Principle #35Parameter changes

3Adaptability or versatility

If the socket needs to move freely in a narrow space to accommodate lens positioning, then the mounting flexibility is improved, but the socket cost increases

Engineering Contradiction:
Improvemounting flexibilityVSAvoidsocket cost
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The annular frame serves multiple functions: it provides the structural housing, guides the radial movement of the socket, and works with the elastic member to position the socket. This multi-functionality eliminates the need for additional expensive components, achieving mounting flexibility at lower cost.

Inventive Principle:
Principle #6Universality (Multi-functionality)

4Volume of moving object

If the elastic contact of the socket has a small effective stroke, then the socket structure is compact, but the elastic contact is easily deformed and lost, causing contact failure

Engineering Contradiction:
Improvesocket structure volumeVSAvoidcontact stability
Core Design Contradiction:
Volume of moving objectVSReliability

Solution Approach 1:

The elastic member acts as an intermediary between the socket and the lens connection part. It transmits the urging force to the socket, ensuring stable electrical contact without requiring the socket itself to have a large effective stroke or complex deformation characteristics, thus maintaining contact stability in a compact structure.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

The apparatus reduces socket volume, minimizes contact failures, and enhances mounting convenience, especially for heavy lenses, while maintaining precise positioning and reducing costs.

Implementation Method 1

a first elastic member (4) provided to urge the socket (3) from an outer periphery toward a center of the annular frame (2)

Methodology Applied
Scientific EffectElastic force: Elasticity

Implementation Method 2

The annular frame (2) is rotatably mounted on the base (1). The annular frame (2) is configured to fix the lens (5) inserted and attached into the base (1) by rotating the annular frame (2) in one direction by a predetermined angle

Methodology Applied
Scientific EffectMechanical rotation:

Data Source

PatentUS12416851B2Lens mounting apparatus and projector
Publication Date: 2025.09.16 PANASONIC PROJECTOR & DISPLAY CORPORATION
  • US12416851B2 patent drawing
  • US12416851B2 patent drawing
  • US12416851B2 patent drawing

AI summary

A lens mounting apparatus includes a base including an opening, wherein a lens including a connection part is inserted and attached, an annular frame including a notch provided on a part of an outer periphery, a socket electrically connected to the connection part of the lens, and a first elastic member provided to urge the socket from the outer periphery toward a center of the annular frame. The annular frame is configured to fix the lens inserted and attached into the base by rotating the annular frame in one direction by a predetermined angle. When the annular frame does not fix the lens, the notch does not face the socket. When the annular frame fixes the lens, the notch faces the socket, and the socket is electrically connected to the connection part of the lens by an urging force of the first elastic member.