Adjustable Helmet Massager Ratchet Mechanism
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Solution Overview
Problem
Existing head massagers have helmets with fixed headroom sizes, which can be either too large or too small for different users, leading to discomfort during use.
Innovation Solution
A helmet massager with an adjustable helmet design featuring a butt-jointed structure, an adjusting device comprising a base, gear, ratchet body, and knob, allowing for the adjustment of headroom size by engaging and disengaging ratchet teeth, ensuring a secure and comfortable fit for various head shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the helmet has a fixed head room, then the structure is simple and easy to manufacture, but the helmet cannot adapt to different users' head sizes, causing discomfort
Solution Approach 1:
The helmet shell is divided into multiple adjustable segments that can change relative positions. The adjusting device includes a rack, pinion gear, and locking mechanism that enable dynamic adjustment of the helmet's head room size, transforming a static fixed-structure helmet into a dynamic adjustable one that adapts to different users.
Solution Approach 2:
The helmet shell is segmented into adjustable parts connected by the adjusting device. The rack is divided into multiple positioning slots, and the helmet shell is separated into components that can move relative to each other, allowing independent adjustment of different sections to accommodate various head shapes and sizes.
2Ease of operation
If the helmet head room is adjustable, then it can fit different users comfortably, but the adjusting mechanism increases device complexity
Solution Approach 1:
The adjusting device incorporates a self-locking mechanism where the pinion gear automatically engages with the rack teeth and locks at predetermined positions without requiring additional locking steps. The elastic component provides automatic return force, and the bevel gears enable bidirectional adjustment, making the system self-sufficient and easy to operate.
Solution Approach 2:
The pinion gear acts as an intermediary between the user's manual input and the helmet shell adjustment. By rotating the pinion gear, the user indirectly controls the movement of the rack and the relative position of helmet segments, providing a mechanical advantage and precise control through the gear-teeth engagement.
3Reliability
If the ratchet body can rotate freely, then adjustment is smooth, but the helmet cannot maintain its adjusted position, causing improper rotation
Solution Approach 1:
The ratchet body transitions between two dynamic states: a locked state where the elastic component stores energy and maintains the adjusted position, and an unlocked state where the bevel gears allow smooth rotation for adjustment. This dynamic switching between states enables both position stability and adjustment smoothness.
Solution Approach 2:
The elastic component is pre-loaded to provide a preliminary counteracting force that prevents improper rotation of the ratchet body. When the helmet shell is adjusted to a new position, the elastic component automatically engages to lock the position, preemptively preventing any unintended rotation or position drift.
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 adjustable design allows for customizable headroom, accommodating different users' head forms, providing a secure and comfortable massage experience by allowing the helmet to be easily adjusted to fit various head sizes, preventing improper rotation and ensuring self-locking of the adjusting mechanism.
Implementation Method 1
the ratchet body has a rotating state and a rest state, when the ratchet body is in the rest state, the ratchet teeth engage with the locking teeth
Implementation Method 2
the ratchet body comprises a body and an elastic arm cantilevering from the body and having an elasticity
Data Source
AI summary
A helmet massager and a helmet thereof are provided. The helmet massager comprises a helmet. The helmet comprises a first helmet body. The first helmet body comprises a first left helmet body and a first right helmet body which are butt jointed. The first left helmet body and the first right helmet body respectively have a first left rack and a first right rack. The helmet further comprises an adjusting device. The adjusting device comprises a base, a gear, a ratchet body with ratchet teeth, and a knob for driving the ratchet body to rotate. The base is located at a butt-joint site of the first left helmet body and the first right helmet body. Each of the first left rack and the first right rack engages with the gear. The ratchet body is positioned on the gear. The knob is mounted on the ratchet body. The base has a ring of locking teeth. The ratchet body has a rotating state and a rest state. When it is desired to adjust a size of a head room, the knob is turned in a forward direction or a reverse direction so that, via the ratchet body, the gear is driven by the knob to rotate. In this way, two adjacent butt-joint ends are driven by the gear to move away from or close to each other to change the size of the head room.