Rear-Focus Lens Attachment Frame Inner Wall Partition
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Solution Overview
Problem
The existing rear-focus-type lens devices face challenges in accommodating multiple switches due to size constraints, leading to reduced strength and accuracy of the attachment frame and difficulties in wiring, as they require additional space that is not available.
Innovation Solution
The design incorporates an attachment frame with an inner wall that partitions the space to accommodate both the focus lens and switch assembly, reinforcing the frame's strength and allowing for efficient wiring without increasing the number of parts, using a cylindrical shape with guide shafts and a flexible printed circuit board for electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple switches are provided in the attachment frame to operate the lens device, then the functionality of the lens device is improved, but the structural strength and accuracy of the attachment frame are reduced due to space constraints and frame weakening
Solution Approach 1:
The attachment frame is divided into multiple spaces by introducing an inner wall that partitions the frame into a first space for the focus lens and a second space for the switch assembly. This segmentation allows the switches to be accommodated without compromising the overall structural strength, as the inner wall reinforces the frame while creating dedicated zones for different components.
Solution Approach 2:
The inner wall is positioned to extend in the radial direction of the attachment frame, utilizing the radial dimension to create separation between the focus lens and switch assembly. This dimensional approach allows both components to coexist without interfering with each other, while the inner wall itself contributes to the structural integrity of the frame.
2Volume of moving object
If the attachment frame size is reduced to accommodate the focus lens, then the overall device size is minimized, but there is insufficient space to arrange multiple switches and wiring
Solution Approach 1:
The attachment frame is segmented into two distinct spaces: a first space for the focus lens and a second space for the switch assembly. This segmentation enables efficient use of the available volume, allowing both the focus lens and multiple switches to be accommodated within the reduced frame size without requiring additional space.
Solution Approach 2:
The switch assembly is nested within the attachment frame's second space, utilizing the available volume efficiently. The inner wall creates a dedicated nested region for the switches, allowing them to be accommodated within the overall compact structure of the attachment frame without increasing the total device size.
3Ease of operation
If an opening is formed in the attachment frame to attach the switch assembly, then the switch assembly can be integrated into the frame, but the strength and accuracy of the attachment frame are reduced
Solution Approach 1:
The attachment frame is segmented into two spaces by the inner wall, which creates a dedicated region for the switch assembly. This segmentation allows for the formation of an opening in a controlled manner, enabling the switch assembly to be integrated while the inner wall compensates for the strength and accuracy that would otherwise be compromised by the opening.
Solution Approach 2:
The inner wall acts as an intermediary structure that mediates between the opening and the rest of the attachment frame. It provides structural support and maintains manufacturing precision in the regions affected by the opening, while still allowing the switch assembly to be attached through the opening.
Data Source
AI summary
Disclosed is a rear-focus-type lens device in which a switch assembly including a plurality of switches can be provided in an attachment frame having, for example, a focus lens accommodated therein and which is capable of ensuring the strength of the attachment frame and the accuracy of the parts. A mounting frame provided on the rear side of a lens barrel body includes: an inner wall that partitions the inside of the mounting frame into a first space which accommodates an internal structure including, for example, a focus lens and a second space which accommodates a switch assembly including a plurality of switches for operating the lens device; and an opening of the second space which is formed in the side surface of the mounting frame and to which the switch assembly is attached. The strength of the mounting frame is ensured by the inner wall.