Hair Clipper Mounting Assembly for Multi-Axis Pivot Control
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Solution Overview
Problem
Existing hair cutting appliances struggle to maintain optimal contact between the cutting unit and the user's skin surface, limiting cutting performance due to inadequate pivotability.
Innovation Solution
A mounting assembly with separate primary and secondary bearing surfaces that allow for sliding rotation and limited movement along multiple axes, incorporating a driving unit to impart reciprocating motion to the cutting unit, enhancing pivotability and contact with the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single bearing surface is used to couple the head and counterpart, then the structure is simpler, but the pivotability and contact optimization with skin surface is insufficient
Solution Approach 1:
The bearing surface is divided into separate primary and secondary bearing surfaces, each with distinct functions. The primary bearing surface allows sliding rotation about the first rotational axis, while the secondary bearing surface limits movement along the second axis perpendicular to the first rotational axis. This segmentation enables enhanced pivotability while maintaining structural control.
Solution Approach 2:
The invention introduces movement constraints in multiple dimensions by adding the secondary bearing surface that limits movement along the second axis. This multi-dimensional constraint system provides superior pivotability and skin contact optimization compared to single-axis bearing arrangements.
2Adaptability or versatility
If bearing surfaces allow extensive movement for skin contact, then pivotability improves, but manufacturing precision and stability deteriorate
Solution Approach 1:
Different regions of the bearing surface structure serve different functions: the primary bearing surface provides sliding rotation capability for skin contact optimization, while the secondary bearing surface provides movement limitation for manufacturing precision and stability. This local differentiation of functions resolves the contradiction between adaptability and precision.
Solution Approach 2:
The invention changes the geometric parameters of the bearing surfaces, specifically configuring the secondary bearing surface to limit movement along the second axis. This parameter modification enables controlled movement that maintains both skin contact optimization and manufacturing precision.
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 solution enables improved cutting performance by allowing the cutting unit to follow the contours of the skin surface, ensuring optimal contact and reducing manufacturing tolerances through a more stable and tolerant design.
Implementation Method 1
the driving axle comprising an eccentric pin cooperating with the driving bridge to impart reciprocating motion to the driving bridge
Implementation Method 2
configured to contact the primary head bearing surface along a contact line to limit movement of the head towards the counterpart
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
According to an aspect, there is provided a mounting assembly (20) for a hair cutting appliance (10), the mounting assembly comprising: • a head (22) configured to receive a cutting unit and comprising: • a body (24) extending along an elongate axis (50); • a driving bridge (26) configured to couple to the cutting unit and to reciprocally move relative to the body along the elongate axis to reciprocally move the cutting unit relative to the body; • a primary head bearing surface (44); and • a separate secondary head bearing surface (52); • a counterpart (40) pivotably coupled to the head, the counterpart comprising: • a primary counterpart bearing surface (46) configured to cooperate with the primary head bearing surface to permit sliding rotation of the counterpart relative to the head about a first rotational axis (60) which is parallel to the elongate axis, and configured to contact the primary head bearing surface along a contact line to limit movement of the head towards the counterpart along a second axis (30) perpendicular to the first rotational axis; and a secondary counterpart bearing surface (54) separate from the primary counterpart bearing surface and configured to cooperate with the secondary head bearing surface to permit sliding rotation of the counterpart relative to the head about the first rotational axis, and configured to bear against the secondary head bearing surface to limit movement of the head relative to the counterpart along a third axis (70) which is perpendicular to the second axis and the first rotational axis; and a driving unit (34) comprising a driving axle (36) and a socket (38), the driving axle comprising an eccentric pin (42) cooperating with the driving bridge to impart reciprocating motion to the driving bridge, and the socket being configured to cooperate with a motor (14).