Toothbrush
A toothbrush and rear-end technology, applied in the field of toothbrushes, can solve the problems of insufficient flexural strength of the head with hair implantation strength, etc., and achieve the effect of good intraoral operability
Active Publication Date: 2019-06-14
LION CORP
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- Abstract
- Description
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- Application Information
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Problems solved by technology
In particular, in the case of a flat wire type hair transplant in which bristles are fixed by driving a flat plate made of metal into a head made of resin, the strength of the hair transplant and the bending strength of the head may sometimes be insufficient. Sufficient situation
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～ Embodiment 5、 comparative example 1～ comparative example 7
[0082] The toothbrushes of Examples 1 to 7 and Comparative Examples 1 to 7 in which the neck portion 120 was formed were prepared according to the specifications shown in [Table 1] above. The width, length, thickness, and shape of the head and the handle are all the same. Injection molding PP resin to obtain Figure 3-4 The integral molding of the head and the handle body described in (from the front end of the head to the handle body, the arrangement of the hair-planting holes is 3 holes × 1 row, 4 holes × 6 rows, 3 holes × 1 row. The width of the head 10mm, length 25mm, thickness 3.0mm. The length of the handle body is 110mm. The length of the neck is 48mm). A bundle of tapered bristles (7.5 mil) formed of filaments made of PBT was implanted in the head by flat wire hair transplantation to produce a toothbrush.
[0083] The neck width in each example is the minimum position, the value obtained by D / W in each position where the distance from the rear end side of the minimum...
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Abstract
Provided is a toothbrush with a thin head with which good maneuverability can be obtained. The toothbrush is provided with a head section (110), which is disposed at the tip end and in which bristle bundles are implanted in an implanted bristle surface (111), a neck section (120) extending from the back end of the head section, and a handle section (130) extending from the back end of the neck section. The thickness of the head section is 2.0-4.0 mm. The neck section is formed so that the minimum value for the width in the direction parallel to the implanted bristle surface and orthogonal to the longitudinal direction of the handle section is 3.5 mm to 4.5 mm, and the width is constant or gradually increases towards the back end from the position with the minimum value. When the neck section width is W mm, the thickness in the direction orthogonal to the implanted bristle surface is D mm, and the origin is the position of the minimum value when the neck section width increases gradually towards the back end from the position of the minimum value or the origin is the position of the minimum value closest to the tip end when the neck section width becomes constant towards the back end from the position of the minimum value: the value determined by D / W at the position parallel to the implanted bristle surface and separated 10 mm towards the back end is 0.7 to 2.5; the difference between the value determined by D / W at the position of the origin at which the width is the minimum value and the value determined by D / W at the position separated 20 mm towards the back end from the position of said origin is at least 0.05; D / W for the position separated 20 mm towards the back end from the position of said origin exceeds 1.0; and the deflection coefficient M (mm4)=W*D3 at the position separated 10 mm towards the back end from the position of the origin at which the width is the minimum value is 165 mm4 to 625 mm4.
Description
technical field [0001] The present invention relates to toothbrushes. [0002] This application claims priority based on Japanese Patent Application No. 2016-211879 for which it applied in Japan on October 28, 2016, and uses the content here. Background technique [0003] Patent Documents 1 to 3 propose a toothbrush in which the thickness of the head is reduced from the viewpoint of operability in the oral cavity and the like. When the thickness of the head is made thin, there are problems such as a decrease in strength. Therefore, a high-strength resin such as polyacetal resin (POM) is used. In particular, in the case of a flat wire type hair transplant in which bristles are fixed by driving a flat plate made of metal into a head made of resin, the strength of the hair transplant and the bending strength of the head may sometimes be insufficient. full situation. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: JP Unexamined Patent Pu...
Claims
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Patent Timeline
Login to View More IPC IPC(8): A46B9/04A46B5/00
CPCA46B9/04A46B5/00A46B2200/1066A46B5/0029C08L23/10
Inventor 金丸直史龟井诚一
Owner LION CORP