CN110381882B - Dental floss - Google Patents
Dental floss Download PDFInfo
- Publication number
- CN110381882B CN110381882B CN201880002726.5A CN201880002726A CN110381882B CN 110381882 B CN110381882 B CN 110381882B CN 201880002726 A CN201880002726 A CN 201880002726A CN 110381882 B CN110381882 B CN 110381882B
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- China
- Prior art keywords
- dental floss
- handle
- floss
- handle portion
- mold
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C15/00—Devices for cleaning between the teeth
- A61C15/04—Dental floss; Floss holders
- A61C15/046—Flossing tools
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B15/00—Other brushes; Brushes with additional arrangements
- A46B15/0055—Brushes combined with other articles normally separate from the brushing process, e.g. combs, razors, mirrors
- A46B15/0069—Brushes fitted with a interdental devices, e.g. toothpick
- A46B15/0071—Toothbrushes with flossing arrangements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C15/00—Devices for cleaning between the teeth
- A61C15/02—Toothpicks
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C15/00—Devices for cleaning between the teeth
- A61C15/04—Dental floss; Floss holders
- A61C15/041—Dental floss
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1676—Making multilayered or multicoloured articles using a soft material and a rigid material, e.g. making articles with a sealing part
Abstract
The invention relates to a dental floss, characterized in that it comprises: a dental floss portion made of an elastomer material; and a handle part which fixes both ends of the ridge part, wherein the ridge part and the handle part are integrally formed by injection molding.
Description
Technical Field
The present invention relates to dental floss, and in particular, to dental floss that enhances convenience in the manufacturing process of the dental floss.
Background
Dental floss is used as an oral hygiene product and is also known as an interdental cleaning wire. Is beneficial to removing tartar and bacterial films which can not be reached by the toothbrush, and is more and more concerned by people because of safety and sanitation compared with toothpicks which enlarge gaps between teeth and cause inflammation of gum.
The dental floss can be classified according to the presence or absence of wax coating, and when wax is coated on the dental floss, the wax functions as a lubricant and can be smoothly inserted between teeth as compared with a dental floss without wax coating.
Further, the dental floss is classified into a string-shaped dental floss in which the dental floss is wound in a string form and circulated, and an axe-shaped dental floss in which the dental floss is formed between axe-shaped injection molded articles having handles, according to the forms thereof, but recently, the number of pins of the axe-shaped dental floss tends to increase in the market due to the convenience of use.
However, even though the wax-coated dental floss has the advantages as described above, the wire portion of the ax-shaped dental floss sold in the market is still in an unwashed state. This is because the ax-shaped dental floss is difficult to manufacture, and since the plastic of the handle is injection-molded at high temperature after the dental floss is put in, when a wax-coated dental floss is used, the wax applied to the surface of the floss is melted in the injection-molding process, or the wax remains in the dental floss in a non-uniform form, resulting in the generation of defective products. Therefore, the wire portion of the ax-shaped floss cannot be waxed, and such a floss, which is omitted from waxing, cannot be smoothly inserted while being inserted between teeth, thereby making it difficult to adjust force during insertion and possibly injuring gums. Thus, there is also a continuing need for an ax-shaped floss that provides ease of use, a floss that achieves a smooth interproximal insertion force.
In addition, the ax-shaped dental floss is manufactured through at least three steps of 'floss input → plastic injection molding of a handle → removal of residual floss', there are a lot of wasted parts in terms of process and cost, and price competition is strong in the characteristics of the silk floss product used as a disposable product, which results in degradation of quality and a large amount of garbage at a carelessness.
Documents of the prior art
Patent document
Patent document 1: korean authorization Utility model No. 20-0403922 (2005.12.08, authorization)
Patent document 2: korean laid-open patent No. 10-2012 and 0089830 (2012.08.14. publication)
Disclosure of Invention
Technical subject
The present invention has been made to solve the above-described problems of the conventional art, and an object of the present invention is to provide a dental floss comprising: a dental floss including a floss part made of an elastic body (Elastomer) is formed, and at the same time, user convenience and an interdental insertion force are improved, and ease of manufacturing processes is improved.
Means for solving the problems
A dental floss according to an embodiment of the invention is characterized in that it comprises: a dental floss portion made of an elastomer material; and a handle part which fixes both ends of the ridge part, wherein the ridge part and the handle part are integrally formed by injection molding.
Specifically, the handle portion may be formed in an axe shape.
Specifically, the handle portion may include: one end of the tooth line part is fixed in a U shape; and the other end formed in a toothpick shape.
Specifically, the handle portion may include: one end of the tooth line part is fixed in a U shape; and the other end formed in the shape of a interdental brush.
Specifically, the dental floss may further include a folding portion provided between one end and the other end of the handle portion so that the dental floss portion is folded.
Specifically, the folded portion may hinge an end portion of the handle portion toward an end of the handle portion away from the thread portion.
Specifically, the folded portion may be hinged in such a manner that one end portion of the handle portion is overlapped to the other end portion of the handle portion.
Specifically, the folded portion may include a coupling groove and a coupling portion that detachably couples the coupling groove.
Specifically, the ridge portion may be configured as follows: in a folded state, the shortest distance between both ends of the ridge portion is 1mm to 5mm, and in an unfolded state, the shortest distance between both ends of the ridge portion is 10mm to 20 mm.
Specifically, the handle portion may be made of a material having a higher strength than the ridge portion.
Specifically, the dental floss part and the handle part may be integrally formed by double injection molding.
The dental floss manufacturing apparatus according to another embodiment of the present invention is characterized by comprising a mold which injection-molds a dental floss part and a handle part fixing both ends of the dental floss part into one body, the dental floss part being injection-molded from an elastomer material.
Specifically, the mold may include: a first mold for injection molding the handle portion with a first material; and a second mold for injection molding the dental floss portion using a second material, the first material being an elastomer material, a material having a higher strength than the elastomer material, or a hardness-enhanced plastic material, the second material being an elastomer material.
Specifically, the first mold and the second mold may be formed by double injection molding the tooth line portion and the handle portion as a single body.
Effects of the invention
The dental floss of the invention has the effects of simplifying the manufacturing process and obviously reducing the manufacturing time and cost by simultaneously manufacturing the dental floss part and the handle part through injection molding.
Further, the dental floss of the present invention includes a handle portion, so that foreign substances are removed more favorably than conventional dental flosses using strings by forming the floss portion with an elastic body having a large surface friction while maintaining the convenience in use of the conventional ax-shaped dental flosses sold in the market, and the cross-sectional area is reduced by stretching (Tension), so that the dental flosses are smoothly inserted between the teeth.
Drawings
Fig. 1 is a top view of a first embodiment of the floss of the present invention.
Fig. 2 is a top view of a second embodiment of the floss of the present invention.
Fig. 3 is a top view of a third embodiment of the floss of the present invention.
Fig. 4 is a top view of a fourth embodiment of the floss of the present invention.
Fig. 5 is a top view of a fifth embodiment of the floss of the present invention.
Fig. 6 is a conceptual diagram of a mold according to another embodiment of the present invention.
Detailed Description
The objects, certain advantages and novel features of the invention will become more apparent from the following detailed description of the preferred embodiment when considered in conjunction with the drawings. In the description, when reference numerals are given to components in each drawing, the same components are given the same numerals even when they are shown in different drawings. In describing the present invention, when it is determined that a detailed description of a known technique will make the gist of the present invention unclear, a detailed description thereof will be omitted.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings
Fig. 1 is a top view of a first embodiment of the floss of the present invention.
Referring to fig. 1, a dental floss 1 according to a first embodiment of the present invention includes a floss portion 10 and a handle portion 20.
The dental portion 10 may be formed of an elastomer material, specifically, may be formed of a natural rubber or a synthetic rubber having a high flexibility, and may be formed of 1 or more than 2 kinds selected from Latex (Latex), Ethylene Propylene Diene Monomer (EPDM) rubber, Styrene Ethylene Butadiene Styrene (SEBS) rubber, butyl rubber, polyurethane rubber, silicone rubber, copolyester, polyamide (polyamide), and the like, for example, but not limited thereto.
When the floss portion 10 is formed of an elastic material having flexibility and elasticity, the thickness of the floss portion 10 can be reduced according to the force applied, and the floss portion can be smoothly inserted between the teeth.
In addition, in the case where the dental floss portion 10 is made of an elastomer material, the dental floss portion 10 is restored to the original thickness after use, and is not easily broken even after several uses, and thus, the dental floss portion can be used repeatedly.
Further, since the dental floss portion 10 is deformed in accordance with the form of the tooth and moved in a state of being closely attached to the tooth, foreign substances, food, plaque, and the like existing between the teeth can be effectively removed.
As for the thickness of the floss part 10, the diameter may be 0.05 to 2.0mm, and the length of the floss part 10 may be 10 to 50mm or 10 to 20mm, but it is not limited thereto as long as the floss part 10 can be inserted between the teeth.
The cross section of the ridge portion 10 may be formed in various shapes such as a circle, an ellipse, a triangle, a polygon such as a quadrangle, a star, a flower, and the like.
The surface of the dental floss part 10 may be formed to be smooth or formed with fine protrusions. When the surface of the floss part 10 is formed to be smooth, the interdental insertion force can be further improved, and when the surface of the floss part 10 is formed with fine protrusions, foreign substances interposed between teeth can be effectively removed.
The handle portion 20 may be made of an elastic body, a material having a higher strength than the elastic body, or a synthetic resin including a plastic having a reinforced hardness, and may be made of a resin material having a higher strength than the dental floss portion 10, for example.
Specifically, the handle portion 20 may be formed of a resin selected from Polypropylene (PP), polyethylene Terephthalate (PET), polyethylene Terephthalate (PETG), polyethylene Terephthalate (PCT), Polybutylene Terephthalate (P BT), Polybutylene Terephthalate (PCT), Polyarylate (POM), Polystyrene (PS), Acrylonitrile-butadiene-styrene (ABS), Acrylonitrile-butadiene-styrene (PC), Polypropylene (CP), Polystyrene (PA), Polyacrylonitrile (PC), poly Acrylonitrile-butadiene-styrene (PA), poly Acrylonitrile-Acrylonitrile copolymer (PC-2), but is not limited thereto.
The handle portion 20 may be formed in an axe shape. The handle part 20 may include a fixing part 21 formed in a U-shape at one end to fix the tooth line part 10, and may include a tooth pick part 22 formed in a tooth pick shape and/or an interdental brush part 23 formed in an interdental brush shape at the other end.
Both ends of the dental floss part 10 may be embedded in one end of the handle part 20 so that both ends of the dental floss part 10 are fixed to the body by the fixing part 21. Thus, the user is relieved of the hassle of grasping one end of the floss for use by inserting his or her hand into the mouth. The fixing portion 21 is formed in a U-shape, a V-shape,
Character, opened
The shape of the letter is not limited to this as long as both ends of the dental floss portion 10 can be fixed.
Fig. 2 is a top view of a second embodiment of the floss of the present invention.
Referring to fig. 2, the dental floss 1 according to the second embodiment of the present invention may form an interdental brush portion 23 at one end of the handle portion 20 instead of the toothpick portion 22. The interdental brush portion 23 may be formed as a set of projections, disks, or the like, which are regularly or irregularly formed centering on a central axis extending from the handle portion 20. The interdental brush portion 23 may be formed of the same material as the dental floss portion 10, but may be used by mixing different materials as necessary.
The portion from fixed portion 21 to toothpick portion 22 or interdental brush portion 23 is linear, curved or irregularly shaped. In addition, a friction pattern may be formed to improve the grip feeling of the grip portion 20. The friction pattern is formed in a planar form, and may be formed in stripes, lattice patterns, or the like.
The dental floss 10 described above is manufactured by injection molding, in which the floss portion 10 and the handle portion 20 may be formed as one body. The process for manufacturing the dental floss 10 may be a multi-step Injection molding process (i) in which the handle portion 20 is Injection molded first, and then the dental floss portion 10 is Injection molded in order and coupled to the handle portion 20 to complete the dental floss 10, but from the viewpoint of simplification of the process and reduction in cost, it is preferable to manufacture the dental floss 10 by a Double Injection molding (Double Injection) process in which the dental floss portion 10 and the handle portion 20 are simultaneously formed.
Regarding the injection molding or the double injection molding, a method known in the art may be selected and performed according to the manufacturing conditions, and for example, a sliding method, a core rotation method, a mold rotation method, etc. may be used, but not limited thereto.
Fig. 3 is a top view of a third embodiment of the floss of the present invention.
Referring to fig. 3, a dental floss 1 according to a third embodiment of the present invention includes a floss part 10, a handle part 20, and a folded part 30.
In the dental floss of the present embodiment, the same reference numerals are used to designate the portions corresponding to those of the embodiment shown in fig. 1, and the description thereof is the same as that described above. In the dental floss shown in fig. 3, the portions not shown in fig. 1 will be described below.
The folding portion 30 of the dental floss 1 of this embodiment is disposed between one end and the other end of the handle portion 20, and allows the dental floss portion 10 to be folded. Specifically, the dental floss part 10 is folded or unfolded by the folding part 30.
The folding portion 30 is provided between 2 fixing portions 21, 21 'fixing both ends of the tooth line portion 10, one fixing portion 21' disposed adjacent to the other end of the handle portion 20 is fixed to the handle portion 20, and the other fixing portion 21 is movable by the folding portion 30. The other fixing portion 21 is moved by the folding portion 30 so that the dental floss portion 10 can be folded.
In addition, unlike the above case, the folding portion 30 may be provided between one fixing portion 21 'disposed adjacent to the other end of the handle portion 20 and the handle portion 20, and the other fixing portion 21 is fixed to the handle portion 20, whereby the one fixing portion 21' is moved by the folding portion 30, and the thread portion 10 may be folded.
The user can store the dental floss 1 in a state where the dental floss part 10 is folded, and can use the dental floss 1 in a state where the dental floss part 10 is unfolded to remove foreign substances, food, plaque, and the like existing between the teeth of the user.
In the case of the dental floss 1 having the folded portion 30, the dental floss 1 can be stored in a state where the dental floss portion 10 is folded, and thus, it is possible to prevent a tension from being continuously applied to the dental floss portion 10 made of an elastic material, and to suppress the dental floss portion 10 from being elongated, thereby effectively improving the long-term reliability of the dental floss 1 and the life of the product.
The folding portion 30 may be selectively formed in various structures for folding and unfolding the dental floss portion 10. For example, the folded portion 30 may be formed by injection molding the handle portion 20 so that the 2 fixing portions 21 and 21' are connected to each other thinly.
Further, after the handle portion 20 is injection molded, the folded portion 30 may be cut so that the 2 fixing portions 21 and 21' are thinly connected to each other.
Since the handle portion 20 is made of a material having flexibility and strength, the dental floss 1 can be repeatedly used for a long period of time even when the folded portion 30 is moved a plurality of times.
In the dental floss 1 of the present embodiment, the fold 30 may hinge an end portion of the handle portion 20 toward an end of the handle portion 20 distal from the dental floss 1. Specifically, when a direction from the other end of the handle portion 20 toward the dental floss portion 10 is referred to as a front direction, the fixing portion 21 can hinge in the vertical direction using the folder 30 as a hinge axis.
As the hinge rotates, the end of the fixed part 21 approaches the end of the fixed part 21 'so that the floss becomes loose or conversely the end of the fixed part 21 moves away from the end of the fixed part 21' so that the floss may be tensed.
A coupling groove 31 may be formed at one end portion of the folded portion 30, and a coupling portion 32 may be formed at the other end portion of the folded portion 30. The coupling portion 32 is attached to the coupling groove 31 to connect one end portion and the other end portion of the folded portion 30, so that the dental floss 1 can be used in a state where the dental floss portion 10 is unfolded. As the coupling portion 32 is detached from the coupling groove 31 and one end portion of the folding portion 30 is separated from the other end portion, the dental floss 1 can be stored in a state where the dental floss portion 10 is folded.
The coupling groove 31 is formed in an engraved shape having a predetermined shape, and the coupling portion 32 is formed in a male-engraved shape corresponding to the engraved shape of the coupling groove 31. However, the configuration is not limited to this as long as the one end portion and the other end portion of the folded portion 30 can be connected or separated, and the one end portion and the other end portion of the folded portion 30 may be connected or separated by a magnet, a hook and loop fastener (hook and loop fastener), or the like.
The shortest distance between both ends of the dental floss portion 10 in a state where the dental floss portion 10 is folded by the folding portion 30 may be 1mm to 5mm, and the shortest distance between both ends of the dental floss portion 10 in a state where the dental floss portion is unfolded may be 10mm to 20 mm. When the shortest distance between both ends of the dental floss part 10 in the folded state and the unfolded state is within the above range, the durability and the product performance of the dental floss 1 can be improved. However, the shortest distance between both ends of the dental floss portion 10 is not limited to the above range, and may be appropriately adjusted according to the material of the dental floss portion 10, the fixing portions 21, 21', and the handle portion 20.
Fig. 4 is a top view of a fourth embodiment of the floss of the present invention.
Referring to fig. 4, a dental floss 1 according to a fourth embodiment of the present invention may include a floss portion 10, a handle portion 20, and a folding portion 30, like the dental floss 1 according to the third embodiment of the present invention, and the differences from the dental floss 1 according to the third embodiment of the present invention will be described below.
The folded portion 30 of the dental floss 1 of the present embodiment can hinge in such a manner that one end portion of the handle portion 20 is overlapped on the other end portion of the handle portion. Specifically, when a direction from the other end of the handle portion 20 toward the dental floss portion 10 is referred to as a front direction, the fixing portion 21 can be hinged in the left-right direction with the folder portion 30 as a hinge axis.
However, the direction in which the fixing portion 21 is moved by the folded portion 30 is not limited thereto.
An additional folding portion (not shown) may be provided between the fixing portion 21' and the other end of the handle portion 20. When a direction from the other end of the grip portion 20 toward the dental floss portion 10 is referred to as a front direction, the fixing portion 21' can be hinged in the left-right direction with the additional folded portion as a hinge axis. This can reduce the overall length of the dental floss 1 during storage, and can improve the ease of storage of the dental floss 1.
A coupling groove 31 is formed at one end portion of the folded portion 30 of the present embodiment, and a coupling portion 32 is formed at the other end portion of the folded portion 30, and the contents regarding the coupling groove 31 and the coupling portion 32 may be the same as those explained in the third embodiment of the present invention.
In this embodiment, the shortest distance between both ends of the string part 10 in the folded state of the string part 10 and the shortest distance between both ends of the string part 10 in the unfolded state of the string part 10 may be the same as those described in the third embodiment of the present invention.
One embodiment of the present invention provides a dental floss 1 comprising a floss part 10 and a handle part 20, and the floss part 10 and the handle part 20 are made of the same elastomer. In this case, the dental floss 1 may be manufactured from one material using one mold including a structure corresponding to the floss part 10 and a structure corresponding to the handle part 20, and thus is manufactured through a single injection molding process instead of performing double injection molding.
In this case, the handle portion 20 is formed in an axe shape and has a thickness significantly thicker than the dental floss portion 10, so that the dental floss portion 10 can have flexibility and the handle portion 20 can have a supporting property different from this.
Fig. 5 is a top view of a fifth embodiment of the floss of the present invention.
Referring to fig. 5, a dental floss 1 according to a fifth embodiment of the present invention includes a thread part 10, a handle part 20, and a folding part 30 like the dental floss 1 according to the third embodiment of the present invention, and the differences from the dental floss 1 according to the third embodiment of the present invention will be described below.
In the dental floss 1 of the present embodiment, the folded portion 30 may be positioned between 2 fixing portions 21, 21 ' fixing both ends of the dental floss portion 10, and the additional folded portion 30 ' may be positioned between one fixing portion 21 ' disposed adjacent to the other end of the handle portion 20 and the handle portion 20. That is, the 2 fixing portions 21 and 21' fixing both ends of the thread portion 10 can move. At this time, only one fixing portion 21 'is moved or the other fixing portion 21 is moved or 2 fixing portions 21, 21' are moved, so that the dental floss portion 10 can be folded.
When a direction from the other end of the handle portion 20 toward the dental floss portion 10 is referred to as a front direction, the other fixing portion 21 can be hinged in the vertical direction as in the third embodiment or in the left-right direction as in the fourth embodiment, with the folded portion 30 as a hinge axis. When the direction from the other end of the grip portion 20 toward the dental floss portion 10 is referred to as a front direction, the one fixing portion 21 'can be hinged in the vertical direction or in the horizontal direction using the additional folded portion 30' as a hinge axis.
However, the moving direction of the fixing portions 21 and 21 ' is not limited to the above-described direction, and the moving direction of the fixing portions 21 and 21 ' by the folding portions 30 and 30 ' may be set to any direction as long as the dental floss portion 10 can be stored in a folded and loosened state.
Fig. 6 shows a conceptual diagram of a mold according to another embodiment of the present invention.
Another embodiment of the present invention provides a floss manufacturing apparatus for manufacturing the dental floss of the present invention. Referring to fig. 6, a dental floss manufacturing apparatus according to another embodiment of the present invention may include a mold that injection-molds a floss part and handle parts fixing both ends of the floss part as one body.
The mold comprises: a first mold for injection molding the handle portion with a first material; and a second mold for injection molding the dental floss part with a second material. In addition, the first material may be an elastomer material, a material having a higher strength than the elastomer material, or a hardness-enhanced plastic material, and the second material may be an elastomer material. The first material and the second material may be different or the same material, and in the case where the first material and the second material are the same material, the first material may be an elastomer material, and in the case where the first material and the second material are different materials, the first material may be a synthetic resin having higher strength than the second material.
The first mold includes an axe-shaped groove for injection molding the handle portion. When the first mold is connected to the second mold, the groove of the first mold is arranged to communicate with a part of the groove of the second mold forming both ends of the ridge portion.
The second mold is formed with grooves (grooves) having an appropriate thickness for injection molding the dental floss portion, and the grooves are formed in a straight line.
The surface of the groove of the second mold may be formed in a smooth form and the surface of the dental floss part may be formed in a smooth surface so that the dental floss part can be easily inserted between teeth when manufactured using an elastic body. Or a fine recess pattern is formed in the groove of the second mold to form a fine protrusion on the floss portion, thereby effectively removing foreign matter sandwiched between teeth. At this time, the recess pattern of the grooves may be smaller than the depth of the grooves determining the diameter of the dental floss part, in order to prevent the fine protrusions from being caught when inserting between the teeth.
The groove of the first mold is deeper than the groove of the second mold, and a friction pattern may be formed in the groove of the first mold to improve a grip feeling of the grip portion. The friction pattern is similar to the depressed pattern, but is formed in a planar form, and may be formed in stripes, lattice patterns, or the like on the grip portion.
A portion corresponding to the other end of the handle portion in the first mold may be provided with a tip form to form a toothpick portion. In this case, the degree of sharpness may be such that the teeth can be sufficiently penetrated without puncturing the gums.
Or, a third mold may be added to the first mold at a portion corresponding to the other end of the handle portion to form the interdental brush part, and at this time, the first material or the second material or a third material different from the first material may be injected into the third mold to injection mold the interdental brush part.
In the case where the material of the toothpick portion and the interdental brush portion is the same as that of the handle portion, the toothpick portion and the interdental brush portion can be manufactured using the first and second molds. In addition, when the toothpick section and the interdental brush section are made of a material different from the handle section or the entire or a part of the dental floss is covered with a material different from the handle section, a third mold may be additionally used.
One end of the handle portion in the first mold is a portion that constitutes a double injection molding with the floss portion of the second mold, and the specific structure of the portion is sufficiently derivable by those skilled in the art from a general mold structure used for the double injection molding, and thus the description is omitted. However, both ends of the floss part may be double injection molded to be buried in one end of the handle part or may be double injection molded to form a surplus portion of the floss part at one end of the handle part.
The coupling structure of the first mold and the second mold is not particularly limited, since a coupling structure of a general double injection mold can be selected.
EXAMPLE 1 confirmation of interdental insertion
In order to confirm ease of insertion between teeth of the dental floss described in the present specification, dental floss having the same axial-shaped handle portion and having (i) a floss portion formed of an elastic body, (ii) a floss portion formed of a thread and coated with wax, and (iii) a floss portion formed of a thread and not coated with wax were prepared, and the strength of force applied when these were inserted between teeth was detected.
The magnitude of the force was measured by a universal test machine, and the required maximum force was measured by inserting dental floss between the large molar teeth (great socket teeth) and the large molar teeth of the artificial tooth model having the narrowest tooth space and lowering the dental floss at a speed of 50 mm/min.
As a result of the experiment, in the case of the dental floss in which the floss portion is formed of the elastic body, a force of 0.62kgf is required when inserting between teeth, and the required force is reduced by 29.5% and 61.3% as compared with the dental floss (0.88kgf) formed of the string which is waxed and the dental floss (1.6kgf) formed of the string which is not waxed, respectively. This means that the floss having the floss portion formed of the elastomer is inserted between the teeth more smoothly than the floss formed of the string, and specifically, the elastomer floss is about 2.6 times easier to insert between the teeth than the floss formed of the string which is not waxed.
[ TABLE 1 ]
| Dental floss part | Force required for insertion between teeth (kgf) |
| Elastic body | 0.62±0.03 |
| Waxed thread | 0.88±0.05 |
| Non-waxed thread | 1.60±0.06 |
The present invention is not limited to the above-described embodiments, and it is apparent that a combination of the embodiments or a combination of at least one of the embodiments and a known technique may be included as another embodiment.
The present invention has been described in detail with reference to the specific embodiments, but the present invention is not limited thereto, and those skilled in the art can modify or improve the present invention within the technical spirit of the present invention.
The present invention is intended to cover, by way of example only, those modifications and variations of the present invention which fall within the scope of the appended claims.
Description of the reference symbols
1: the dental floss is 10: dental floss part
20: handle portions 21, 21': fixing part
22: toothpick portion 23: interdental brush
30, 30': folded portion 31: connecting groove
32: coupling part
Claims (12)
1. A dental floss, comprising:
a dental floss portion made of an elastomer material;
a handle part for fixing two ends of the dental floss part; and
more than one folding part arranged between two ends of the handle part,
the dental floss part and the handle part are manufactured into a whole through injection molding,
at least one of the folded portions hinge-rotates one end portion of the handle portion to fold the ridge portion in such a manner that the one end portion of the handle portion is overlapped to the other end portion of the handle portion.
2. The dental floss of claim 1,
the handle portion is formed in an axe shape.
3. The dental floss of claim 1,
the handle portion includes:
one end of the tooth line part is fixed in a U shape; and
forming the other end of the toothpick shape.
4. The dental floss of claim 1,
the handle portion includes:
one end of the tooth line part is fixed in a U shape; and
the other end is formed into a tooth gap brush shape.
5. The dental floss of claim 1,
the folding portion hinges an end portion of the handle portion toward a tip of the handle portion away from the dental floss portion.
6. The dental floss of claim 1,
the folding part is provided with a connecting groove and a connecting part for assembling and disassembling the connecting groove.
7. The dental floss of claim 1,
the dental floss part is configured as follows: in a folded state, the shortest distance between both ends of the ridge portion is 1mm to 5mm, and in an unfolded state, the shortest distance between both ends of the ridge portion is 10mm to 20 mm.
8. The dental floss of claim 1,
the handle portion is made of a material having a higher strength than the ridge portion.
9. The dental floss of claim 1,
the dental floss part and the handle part are integrally formed by double injection molding.
10. A dental floss manufacturing device is characterized in that,
the dental floss manufacturing equipment comprises a mould, wherein the mould integrates a dental floss part and a handle part which is used for fixing two ends of the dental floss part into a whole through injection molding,
the ridge part is formed by injection molding of an elastomer material,
the mold forms a folded portion between both ends of the handle portion, and the folded portion hinges the one end portion of the handle portion to fold the ridge portion in such a manner that the one end portion of the handle portion is overlapped to the other end portion of the handle portion.
11. The dental floss manufacturing apparatus of claim 10,
the mold comprises:
a first mold for injection molding the handle portion with a first material; and
a second mold for injection molding the dental floss part with a second material,
the first material is a material having a higher strength than the second material.
12. The dental floss manufacturing apparatus of claim 11,
the first mold and the second mold are used for molding the tooth line part and the handle part into a whole in a double injection mode.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2017-0161817 | 2017-11-29 | ||
| KR20170161817 | 2017-11-29 | ||
| PCT/KR2018/014946 WO2019107966A1 (en) | 2017-11-29 | 2018-11-29 | Dental floss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110381882A CN110381882A (en) | 2019-10-25 |
| CN110381882B true CN110381882B (en) | 2022-02-22 |
Family
ID=66850316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880002726.5A Active CN110381882B (en) | 2017-11-29 | 2018-11-29 | Dental floss |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2021504028A (en) |
| KR (2) | KR102132005B1 (en) |
| CN (1) | CN110381882B (en) |
| TW (1) | TWI758568B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111154245A (en) * | 2020-01-23 | 2020-05-15 | 中科信晖(海南)新材料科技有限公司 | Fully-biodegradable dental floss rod handle and preparation method thereof |
| CN113062000B (en) * | 2021-03-15 | 2022-07-22 | 上海灵氟隆膜技术有限公司 | Preparation method and system of polytetrafluoroethylene dental floss |
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| CN108135680B (en) * | 2016-01-14 | 2021-01-12 | 丁松俊 | Dental floss device |
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2018
- 2018-11-29 JP JP2020528879A patent/JP2021504028A/en active Pending
- 2018-11-29 CN CN201880002726.5A patent/CN110381882B/en active Active
- 2018-11-29 TW TW107142815A patent/TWI758568B/en active
- 2018-11-29 KR KR1020180150335A patent/KR102132005B1/en active Application Filing
-
2020
- 2020-06-29 KR KR1020200079385A patent/KR102328837B1/en active IP Right Grant
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| GB8914697D0 (en) * | 1988-07-01 | 1989-08-16 | Gillette Canada | Tooth cleaning device |
| CN2928033Y (en) * | 2006-06-16 | 2007-08-01 | 张济 | Dental floss device capable of controlling pull force and forward moving and changing floss |
| EP2204140A1 (en) * | 2009-01-05 | 2010-07-07 | Tae Jin Kim | Coil type interdental brush |
| CN201558187U (en) * | 2009-07-17 | 2010-08-25 | 上海庭好家庭生活用品有限公司 | Toothpick with floss |
| CN203852442U (en) * | 2014-04-18 | 2014-10-01 | 上海龙洲塑料模具有限公司 | Dental floss and toothpick combined structure |
| CN106137426A (en) * | 2016-07-18 | 2016-11-23 | 徐泱忠 | Rotary line changeable dental floss stick |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110381882A (en) | 2019-10-25 |
| KR102132005B1 (en) | 2020-07-09 |
| TWI758568B (en) | 2022-03-21 |
| JP2021504028A (en) | 2021-02-15 |
| KR20190063440A (en) | 2019-06-07 |
| KR20200083417A (en) | 2020-07-08 |
| KR102328837B1 (en) | 2021-11-22 |
| TW201924620A (en) | 2019-07-01 |
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