Interchangeable Punch Needle Assembly with Guide Bush
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Solution Overview
Problem
Existing punch needles have limited utility due to fixed handles, loose fits, sharp tips, and restricted length, which hinder prolonged use and versatility in embroidery.
Innovation Solution
A punch needle assembly with a single, ergonomic design featuring a hollow handle, guide bush, thumb screw, and threader, allowing for interchangeable punch needles of varying diameters and lengths, ensuring a snug fit and comfort during extended use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a permanent handle is attached to each punch needle model, then the punch needle structure is simple, but the versatility and adaptability are limited
Solution Approach 1:
The punch needle assembly is divided into separate components: a handle assembly and interchangeable needle assemblies. Each needle assembly can be independently removed and replaced, allowing the user to switch between different needle types (straight, curved, different diameters, different lengths) without changing the handle. This segmentation enables versatility while maintaining relatively simple individual component structures.
Solution Approach 2:
The handle assembly is designed as a universal base that can accommodate multiple types of needle assemblies through the interchangeable mechanism. The guide bush and retaining clip system provides a standardized interface that works with various needle configurations, allowing one handle to perform multiple functions with different needles.
2Adaptability or versatility
If existing interchangeable punch needles are designed, then versatility is improved, but additional operations like in-situ molding are required
Solution Approach 1:
The guide bush is pre-installed into the handle assembly during manufacturing, creating a prepared receptacle that readily accepts various needle assemblies. The retaining clip is also pre-positioned to engage with the guide bush, establishing a ready-made retention system before the user receives the product. This preliminary preparation eliminates the need for users to perform additional molding or assembly operations.
3Ease of operation
If the punch needle fit is loose, then the needle can be easily inserted, but the punch needle becomes wobbly and unsuitable for prolonged use
Solution Approach 1:
The guide bush serves as an intermediary component between the handle and the needle assembly. It provides a precisely fitted bore that guides the needle into proper alignment and maintains a snug, stable fit during use. The retaining clip acts as a second intermediary that secures the needle assembly in place. Together, these intermediaries ensure both easy insertion and reliable stability during prolonged use.
4Productivity
If the punch needle tip is sharp, then the needle can penetrate fabric effectively, but it may harm the user
Solution Approach 1:
The guide bush and retaining clip assembly serve as protective intermediaries between the user and the sharp needle tip. The guide bush bore guides the needle along a controlled path, preventing lateral movement that could cause injury. The retaining clip secures the needle firmly in the handle, eliminating wobble and reducing the risk of the sharp tip accidentally contacting the user's fingers during handling or use.
Data Source
AI summary
The present invention relates to a punch needle assembly comprises of a handle (1) with a hollow cylinder (6) inside of the handle (1), a punch holder (2) which is attached to the handle (1). a guide bush (3), a thumb screw (4), a punch needle (5), and a threader (7), in which the guide bush (3) is placed inside the punch holder (2) to insert the punch needle (5), and the thumb screw (4) is inserted into the punch holder (2) horizontally to secure the punch needle (5).