Bracelet Length Adjustment Mechanism with Automatic Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bracelet adjustment devices require complex procedures and user intervention to adjust length, often necessitating passage through maximum length configurations, which is impractical and cumbersome.
Innovation Solution
An automatic conversion mechanism within the adjustment device allows for simple, step-wise length adjustment of the bracelet through a control member, eliminating the need for direct user intervention in the adjustment process, utilizing a rack and jaw system with pushers to automatically displace the adjustment member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional rack and jaw system is used for bracelet adjustment, then the adjustment mechanism is reliable and secure, but the adjustment procedure becomes complex and requires multiple user interventions
Solution Approach 1:
The adjustment member is designed to automatically engage with the rack teeth and lock into position without requiring user intervention to manually secure it. The system serves itself by using the user's pulling action on the bracelet to directly drive the adjustment member along the rack, eliminating the need for separate locking actions or complex multi-step procedures while maintaining reliable positioning
Solution Approach 2:
The adjustment member is pre-configured with engagement features that automatically interact with the rack teeth. The system prepares the adjustment mechanism in advance so that when the user pulls the bracelet, the adjustment member is already positioned to engage the rack and move automatically, eliminating the need for preliminary manual setup or complex activation sequences
2Adaptability or versatility
If push buttons are added to release the rack for adjustment, then the adjustment mechanism can be controlled, but the device complexity increases
Solution Approach 1:
The bracelet itself serves multiple functions: it is both the item being adjusted and the control mechanism. By pulling on the bracelet, the user simultaneously activates the adjustment member to move along the rack and locks it into position. This eliminates the need for separate push buttons or control devices, reducing overall system complexity while maintaining full adjustment control capability
Solution Approach 2:
The control function is extracted from separate buttons or switches and integrated directly into the bracelet structure. The bracelet's natural pulling action is harnessed to drive the adjustment mechanism, removing unnecessary control components and simplifying the overall device while preserving adaptability
3Reliability
If the adjustment member must pass through maximum length configuration, then the rack mechanism can be fully engaged, but the adjustment procedure becomes impractical and time-consuming
Solution Approach 1:
Instead of requiring the adjustment member to pass through a maximum length configuration and then be manually repositioned, the system inverts the approach by allowing the adjustment member to be directly positioned at the desired length through the user's pulling action. The bracelet pull directly drives the adjustment member to the target position on the rack, eliminating the unnecessary intermediate step of passing through maximum length and reducing adjustment time significantly
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 easy, ergonomic length adjustment of the bracelet with minimal user skill required, allowing for precise lengthening or shortening through single-finger pressure on the control member, reducing the complexity and impracticality of prior art devices.
Implementation Method 1
a spring arranged to exert, in a predefined direction along the longitudinal direction of the bracelet, an elastic force on the adjustment member
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to a device for adjusting the useful length of a bracelet including first and second free ends (2, 3), the adjustment device comprising a frame (35, 75, 95) with an adjustment member (38, 78, 98, 220) to be secured to a first free end (3) of the bracelet and capable of sliding in the lengthwise direction of the bracelet relative to the frame, as well as a fastening member (12) for the bracelet, at least indirectly secured to the frame (35, 75, 95, 230, 330) and intended for being secured to the second free end (2) of the bracelet. The device also includes a jaw (54, 226, 326) movable between an operative and inoperative position, in particular due to a predefined action of a user on a control member (56, 116, 240, 340), and arranged so as to lock the adjustment member in the operative position and to leave the member free in the inoperative position, in order to define a plurality of discrete adjustment positions in the longitudinal direction of the bracelet, two adjacent discrete positions defining an adjustment pitch of the useful length of the bracelet. The device is characterised in that it comprises an automatic conversion mechanism (42, 50, 51, 52, 54, 65, 68, 92, 107, 111, 128, 134, 135, 137, 252, 333, 348) arranged so as to automatically convert the action of the user on the control member into a sliding of the adjustment member by one pitch, and enabling the useful length of the bracelet to be adjusted.