Dental Handpiece Spray Layout for Longitudinal Cooling Visibility
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Solution Overview
Problem
Existing dental handpieces struggle to uniformly spread spray water in the longitudinal direction of a cutting tool while minimizing its spread in the lateral direction, which can obstruct the view during tooth cutting.
Innovation Solution
The dental handpiece is designed with a configuration that includes a water introduction hole and multiple chip air holes disposed to intersect each other, ensuring spray water is directed primarily in the longitudinal direction and minimized in the lateral direction, using a one-point water introduction system to reduce the head portion's size and enhance operational visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spray water is spread in the lateral direction to ensure coverage of the cutting tool, then the cutting tool is adequately cooled, but the spray water obstructs the view during tooth cutting
Solution Approach 1:
The patent applies local quality by directing spray water specifically to the cutting edge portion of the cutting tool through a strategically positioned ejection port, rather than spreading water uniformly in all directions. This localized targeting ensures adequate cooling of the critical cutting area while minimizing water dispersion into the operator's field of view, thus resolving the contradiction between cooling effectiveness and visibility.
2Ease of operation
If the water spraying tube path is oriented obliquely downward to introduce spray water from the lower surface, then the spray water can reach the cutting tool, but the spray water spreads in the lateral direction and reduces visibility
Solution Approach 1:
The patent resolves this contradiction by changing the spatial orientation of the ejection port to face the cutting edge portion directly rather than orienting the tube obliquely downward. This dimensional repositioning allows spray water to be delivered effectively to the cutting tool while controlling the spray direction to minimize lateral spread and maintain clear visibility during the dental procedure.
3Device complexity
If a merged portion of water supply tube and air supply tube is used to mix and eject spray water, then the system is compact, but the spray water spreads uniformly in both longitudinal and lateral directions
Solution Approach 1:
The patent maintains the compact merged tube configuration but applies local quality by precisely positioning the ejection port to face the cutting edge portion. This selective directional ejection ensures that spray water is concentrated where needed for cooling while preventing uniform lateral spread that would obstruct visibility, thus resolving the contradiction between system compactness and spray control.
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
This design effectively directs spray water along the cutting tool's longitudinal axis, reducing lateral spread and allowing for clearer visibility during dental procedures while potentially reducing the handpiece's size and complexity.
Implementation Method 1
a plurality of chip air holes provided in a main body portion are disposed to sandwich the water introduction hole in a second direction intersecting a first direction in which an insertion port and the water introduction hole are arranged
Implementation Method 2
the cutting tool generates heat when cutting a tooth. Thus, the dental handpiece has a function of introducing spray water onto the cutting tool so as to cool the cutting tool
Data Source
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AI summary
A dental handpiece (1) is a dental handpiece (1) configured to detachably hold a cutting tool (3). The dental handpiece (1) includes: a holding portion (51) provided with an insertion port (IP) into which the cutting tool (3) is insertable, the holding portion (51) being configured to hold the cutting tool (3) inserted in the insertion port (IP); and a main body portion (MP) configured to accommodate the holding portion (51), the main body portion (MP) being provided with a water introduction hole (WH) and a plurality of chip air holes (CH). The plurality of chip air holes (CH) are disposed to sandwich the water introduction hole (WH) in a second direction (D2) intersecting a first direction (D1) in which the insertion port (IP) and the water introduction hole (WH) are arranged.