Stamp With Swappable Insert Using Spring-Locked Cylindrical Pin
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Solution Overview
Problem
Existing stamps with exchangeable inserts require complex screw connections, making replacement time-consuming and inefficient, and lack a secure and simple mechanism for holding the insert in place during handling.
Innovation Solution
A stamp design featuring a latching projection with a latching recess and a movably guided locking body, secured by a spring element, allowing for easy attachment and detachment of the insert without additional tools, with a cylindrical pin locking mechanism that ensures secure positioning and quick release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex screw connections are used to secure the stamp insert, then the reliability of the connection is improved, but the ease of operation and time required for replacement deteriorates
Solution Approach 1:
The connection mechanism is segmented into distinct functional elements: a locking body with locking protrusions, a stamp insert with corresponding locking recesses, and a spring element providing independent securing action. This segmentation allows the connection to be simple yet reliable, eliminating complex screw threads while maintaining secure attachment through multiple discrete locking points.
Solution Approach 2:
The spring element automatically engages the locking body with the stamp insert upon insertion, providing self-securing without requiring additional tools or manual fastening operations. The elastic force of the spring ensures positive engagement while allowing simple removal by overcoming the spring force, making the system self-service oriented for both attachment and detachment.
2Ease of operation
If simple attachment mechanisms are used for the stamp insert, then the ease of operation is improved, but the reliability and security of the connection deteriorates
Solution Approach 1:
The locking body features multiple locking protrusions positioned at specific locations to engage with corresponding recesses in the stamp insert, creating localized secure connection points. The spring element applies force at a specific location to ensure positive engagement of these local features, providing reliable securing through distributed local locking actions rather than a single complex fastener.
Solution Approach 2:
The locking body is designed with a curved or cylindrical geometry that allows rotational movement during insertion, enabling the locking protrusions to naturally align and engage with the recesses in the stamp insert. This curved design simplifies the attachment motion to a single rotational insertion while ensuring reliable engagement through the geometric constraint of the locking features.
3Reliability
If additional fastening parts are used to secure the stamp insert, then the reliability of the connection is improved, but the device complexity and manufacturing cost deteriorates
Solution Approach 1:
The locking body combines multiple functions into a single integrated component: it provides the locking protrusions for securing the stamp insert, serves as the mounting structure for the spring element, and acts as the interface between the stamp insert and the stamp body. This merging eliminates the need for separate fastening parts such as screws, clips, or retainers, reducing device complexity while maintaining reliable fastening through the combined action of the locking features and spring element.
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
Enables simple, secure, and rapid exchange of stamp inserts, reducing handling time and eliminating the need for additional tools, while ensuring the insert is held firmly in place during use and easily removable for replacement.
Implementation Method 1
a spring element (9) is provided in a recess (12) in the stamp body (2), which interacts with the locking body (11)
Data Source
Figure 1~3
Figure 4
AI summary
The stamp (1) has a stamp body (2), which has a semi-circular recess (8,14), in which a stamp insert (4) with stamping markings is inserted. The stamp insert has a detent projection (7) in its semi-circular recess. The detent projection of the stamp insert has a detent cavity (10). The stamp insert in the assembly target position abuts in the stamp body on a stop in a recess of the stamp body and engages in the detent cavity arranged on the stamp insert in the detent body (11).