WO2010062009A1

WO2010062009A1 - Toothbrush and manufacturing method thereof

Info

Publication number: WO2010062009A1
Application number: PCT/KR2009/001065
Authority: WO
Inventors: 김태연
Original assignee: Kim Tae Yeon
Priority date: 2008-11-28
Filing date: 2009-03-04
Publication date: 2010-06-03
Also published as: WO2010062009A8

Abstract

The present invention relates to a toothbrush manufactured by injection molding and a manufacturing method thereof. More specifically, the toothbrush comprises: a body unit which is connected to a driving unit for an electric toothbrush or forms a grip on the toothbrush; a head unit which is extended from the body unit and supports bristles of the toothbrush in the lower side of the toothbrush; the bristles which are placed on the head unit and directly come in contact with teeth when brushing teeth, wherein the bristles are characterized in being manufactured by injection molding. Unlike existing manufacturing methods, the invention enables the fabrication of the bristles through injection molding. Therefore, the invention is able to reduce an impact on teeth by reducing loss, fraying, or separation of the bristles and promotes simplicity of manufacturing.

Description

Toothbrush and toothbrush manufacturing method

The present invention relates to a toothbrush by an injection molding method and a method for manufacturing the toothbrush. More particularly, the present invention relates to a method of producing a single-piece injection or double-injection method, and a toothbrush manufactured by the above method, rather than a method of planting ordinary bristles on the head of a toothbrush.

The present invention is provided with a body portion and a head portion of the toothbrush when brushing teeth brushing the toothbrush for cleaning the tooth by brushing the teeth by directly contacting the teeth, such as a conventional method for planting the brush head on the toothbrush The present invention also relates to a toothbrush manufactured by a method of injection molding or a double injection method together with a head portion and a body portion of a toothbrush and a method of manufacturing the same.

Recently, there is a tendency to improve the quality of human life according to the well-being craze, and accordingly, much attention is paid to the public about the health of teeth. In order to maintain the health of the teeth, various types of toothbrushes are on the market. Toothbrushes having various types of bristles are widely used due to the development of the technology for the toothbrushes.

1 and 2 are perspective views showing a toothbrush according to the prior art.

As shown in FIG. 1, the toothbrush has bristles 3 and an elastic body 4 is built therein so as to have flexibility in the body 2 in which the bristles 3 have been planted with hair. The toothbrush is designed to bend inward to conform to the shape of the tooth, and when brushing the inside of the tooth, the brushed head is formed to bend outward so that every corner is well wiped according to the arranged shape of the tooth. Utility Model Registration No.: 20-0407515, Name of Design: Toothbrush every corner.

According to the above-described design, the body 2 is formed in front of the handle 1, the upper surface of the body 2 in the conventional toothbrush made by planting a plurality of bristle 3, the bristle Unlike the material of the handle 1, the body 2 in which the hairs are flocked 3 is constituted as a soft soft synthetic resin, and the inside of the body 2 is flipped on both sides with appropriate elasticity. The built-in elastic body (4) has a merit that can be evenly polished inside and outside of the tooth as designed to bend inward or outward, respectively, when cleaning the inside and outside of the tooth.

Figure 2 also shows a toothbrush according to the prior art, the bristle 21 is implanted in the head member 20 of the tip of the toothbrush pole 10, the handle portion 12 and the neck 11 in the longitudinal direction is said The head member 20 is formed integrally with the head member 20 so as to be cleaned by holding the handle 12 by hand, the head member 20 crosses the longitudinal direction of the toothbrush pole 10. It is about being formed to achieve (utility model registration number: 20-0225409, designation name: toothbrush).

According to the above design, when cleaning the molar teeth located inside the oral cavity, it is easy to move to the position to wash, and when cleaning the tongue or incisor, the inside of the front teeth, fingers and wrists held by the toothbrush 10, Since the angle of the arm is placed in a straight line, there is an advantage such that the tooth can be easily washed even when the elderly and the child washes the teeth by inducing a posture that does not overdo the arm.

However, according to the conventional techniques as well as other conventional techniques, there is no difference in planting the bristles to the head of the toothbrush, so that the more you use the toothbrush, the more the bristles fall out, the bristles become bent, As a result, only a part of the bristles may be separated from the head.

The bristles are in direct contact with the teeth to clean the teeth.However, when the bristles such as these are separated from the head of the toothbrush, they hurt the gums or the food residues and plaques remaining between the teeth are less effective. There was a problem that the cleaning is not well done. In addition, there is a problem that the quality of the bristles are missing or detached to the outside due to the formation of the bristles by the method of hair removal when manufacturing the toothbrush.

In order to solve the above problems, the present invention, apart from the conventional method of planting the bristles to the head portion of the toothbrush, by the injection molding method of forming the bristles are injected together when forming the head portion of the toothbrush or the bristle head portion of the toothbrush And a method of manufacturing a toothbrush in which the bristles are not bent or pulled out or some of the hairs do not escape to the outside by forming a thin portion by a double injection method after forming the body portion, and a toothbrush manufactured by the above method.

The present invention as one aspect for achieving the above object,

A body part connected to the driving part of the electric toothbrush or forming a grip part of the toothbrush; A head portion extending from the body portion to support the bristles at the bottom of the bristles; And brush heads located in the head part and directly contacting teeth when brushing teeth; In the toothbrush consisting of, the bristle is to a toothbrush, characterized in that produced by the injection molding method.

The injection molding method may be an injection molding method in which a body part, a head part, and bristles are simultaneously manufactured. In addition, the injection molding method is also possible to manufacture the body portion and the head portion by the injection molding method, it is also possible to manufacture the bristles by the double injection molding method. The double injection molding method is also possible by the micro injection method, and the injection molding method is manufactured by the injection molding method in which the body part, the head part and the bristles are manufactured at the same time, and the double injection molding is performed on the edge of the head part. It is possible to produce by the method.

And the injection molding method is manufactured by the injection molding method of the body portion and the head portion, the head portion is a resin inlet, the head portion a plurality of holes to create bristles, the inner portion of the head to form a hollow portion The resin inlet, the hollow part and the plurality of holes may be injection molded to be connected to each other, and the resin inlet may be formed by double injection to form the bristles out of the hole connected to the hollow part by injecting the resin into the resin inlet. It may be provided. In addition, the bristles may have two or more different thicknesses or 0.01 mm to 0.2 mm.

In addition, the bristles may have two or more different lengths, or the length of the bristles may be 5 mm to 20 mm.

In addition, the bristles may be bristles having different angles from the bottom surface of the head, and the angle may be 70 ° to 110 °. And the bristle may include a fragrance material or antibacterial material. And the bristles located in the head portion may be provided in the direction of two or more directions of the upper surface, lower surface, right side and left side of the head portion.

Mold preparation step for manufacturing a toothbrush; Closing the mold; Injection molding step; Mold cooling step; And removing the toothbrush from the mold; It may be presented in a toothbrush manufacturing method comprising a. The mold may be manufactured as being a micro mold.

In addition, the mold preparation step for the production of the toothbrush; Closing the mold; Manufacturing by injection molding the body and head of the toothbrush; Preparing by the method of double injection on the bristles; Mold cooling step; And removing the toothbrush from the mold; Toothbrush manufacturing method characterized in that it comprises a. The mold may be manufactured as a micro mold, or the bristles may be manufactured using an injection injection method.

According to the present invention, by manufacturing the bristles in the injection molding method unlike the usual case in manufacturing a toothbrush, less bristles fall out, worn out or out of the impact to less teeth, The method of production is not the method of planting but the method of injection, and thus the simplicity in production is attained.

In addition, when the bristles are manufactured by injection, it is not necessary to form a hair transplant hole having a volume for inserting, accommodating, and fixing the ends of the bristles separately manufactured, so that the same bristles volume can be realized. The thickness and width of the part can be further reduced, and bristles can be formed on the edge of the head part, thereby easily entering the narrow space part in the oral cavity and easily brushing the teeth.

In addition, such as applying a method of injection molding only to a part of the head portion, or a method of mixing injection and woolen hair, etc., it is more suitable to meet the manufacturing conditions, consumer tastes, requirements, etc. among a variety of methods that could not be applied previously. Optional can be applied.

When the bristles are manufactured by injection, they have a cross-sectional shape having a plurality of corners such as a triangle, a square, a polygon, a semicircle, a crescent shape, or a cross-sectional shape having curved edges in which concave portions and convex portions are alternately continuously formed. Embodiments can be easily implemented, such as the oral contact characteristics and cleaning characteristics that could not be generally implemented in the bristles having a circular cross-section, the gap shape between the bristles and the adhesion of the cleaning liquid, inherent bend according to the pressing force or direction of movement Directionality and the like.

In addition, when the bristles are formed to have a cross-sectional shape having a plurality of corners such as a triangle, a square, a polygon, a semicircle, a crescent, or a cross-sectional shape having curved edges in which concave and convex portions are alternately suspended, a circular cross section is formed. Compared to the case, the separation interval between the bristles may be further expanded, or the contact surface with the cleaning liquid may be further expanded, and thus, another amount of the cleaning liquid may be contained and applied.

And, by forming a soft material such as thermoplastic elastomer (TPE) by double injection, such as the edge of the head portion, the end of the bristles or the grip portion of the handle portion to give soft properties, medical, laboratory, cosmetic, infant, Can be used safely for the elderly.

In addition, when the body portion, the head portion, or the bristles are composed of biodegradable resins, they provide environmental friendliness according to the acceleration of decomposition speed, and are eco-friendly biodegradation properties even when in contact with and ingested by human body, thereby making it possible to achieve There are no safety and health problems such as skin irritation, body accumulation, and carcinogenesis caused by contact and ingestion, and thus it can be safely used for medical, laboratory, cosmetic, infant, and elderly.

In forming the head portion so as to have a rectangular cross section or a cross-sectional shape such as an ellipse or a circle, the bristles are formed in all directions over the entire outer surface of the head portion or partially injection-molded on a part of the outer surface of the head portion. By brushing, it is possible to efficiently clean at the same time not only on one side but also on multiple faces or in various directions.

1 and 2 are a perspective view showing a toothbrush according to the prior art.

Figure 3 is a flow chart of a toothbrush manufacturing method according to an embodiment of the present invention.

Figure 4 is a flow chart of a toothbrush manufacturing method according to another embodiment of the present invention.

Figure 5 is a perspective view of the toothbrush by injection molding according to an embodiment of the present invention.

Figure 6 is a perspective view before the double injection of the toothbrush by injection molding according to another embodiment of the present invention.

7 to 10 are views showing different embodiments of the toothbrush by the injection molding method according to the present invention.

Figure 11 is an assembled perspective view showing a toothbrush by injection molding according to another embodiment of the present invention.

100: toothbrush 110: toothbrush body portion

120: toothbrush head portion 121: toothbrush head portion border

122: resin inlet 123: toothbrush head hollow portion

124: hole 130 to 190: brush head

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a flow chart of a toothbrush manufacturing method according to an embodiment of the present invention, Figure 4 is a flow chart of a toothbrush manufacturing method according to another embodiment of the present invention, and Figure 5 is an injection molding according to an embodiment of the present invention The perspective view of the toothbrush by each is shown.

As shown in the figure, first, the bristles 130 and the body portion 110 and the head portion 120 of the toothbrush to form the resin by the injection molding method and the bristle 130 and body portion 110 and the head portion A mold capable of forming 120 is provided (S100).

After the mold is prepared, a mold closing, that is, a process of closing the mold is performed (S200). An injection process is performed in which the bristles 130 and the body part 110 and the head part 120 of the toothbrush can be simultaneously formed in the injection molding method (S300).

Here, the injection process may be injection molding using a micro mold, which refers to rapidly forming a micro mold product by heating the mold die. More specifically, it means that the injection-supplied resin can be rapidly molded into the product by rapid cooling while being filled evenly into the molding space of the mold by rapid heating.

In recent years, as the demand for plastic products increases, molding technology, fine shape products or large patterns with thin patterns for thin wall parts having a thickness of less than 1 mm or a ratio of flow length and thickness of 100: 1 or more have a pattern. The molding technology of the product requires proper setting of injection molding conditions (resin and mold temperature, injection speed, injection pressure and holding pressure, etc.) which are different from general products. There can be injection using a micro mold.

After the injection, the process of pressing the resin tightly to the product shape can be made. After the injection process is a cooling process (S400) is made and then to open the mold to take out the produced toothbrush (S500).

However, as shown in FIG. 4, a double injection method may be additionally provided after the injection process S310 which may simultaneously form the body 110 and the head 120 of the toothbrush in the mold by injection molding. .

Double injection refers to a method of injection using different dissimilar materials as described above. Herein, the double injection will be described in more detail by using two different resins or two different color resins using an injection machine or a core or slide structure having two injection devices and a rotating mechanism installed on a movable plate. It is a mold designed to be double-injection and filled with a secondary resin in the space between the first molded product and the second cavity (CAVITY).

The cavity on the primary side and the secondary side are correctly replaced, so there are few restrictions on the shape and wide range of product application, which makes it possible to diversify the design. In addition, by injecting at a time, the conventional injection molding is formed into two parts in two times, and the second process of welding or painting process is carried out to produce the product by one molding, thereby reducing the cost and of various designs. There is an advantage that can be produced.

In addition, in the present invention, when forming the bristles 130 of the toothbrush, the injection molding method for forming the bristles 130 on the upper surface of the head portion may be used.

Here, the injection injection method is a commonly used technique, and is one of the injection methods that are widely known. Brief description of the mold of the present invention using the same as follows.

First, the body portion 110 and the head portion 120 of the toothbrush is formed by injection molding (S310). Then, the bristles 130 are formed by using a heterogeneous resin, and a thin disk-shaped micro mold (not shown) is installed to surround the outer circumferences of the body 110 and the head 120 of the toothbrush. 130 to be injection molded (S320).

As described above, a plurality of micro molds (not shown) are installed to be sequentially stacked along the longitudinal direction of the head portion 120 of the toothbrush so that numerous bristles 130 may be molded at a time. Can be changed freely. And the head 120 itself may be provided to serve as a mold.

As described above, the material of the head portion 120 and the body portion 110 of the toothbrush and the material of the bristles 130 are produced, the material of the bristle 130 is the deformation of the bristle of the bristle 130 It is preferable to manufacture using a soft material so as to perform the role of the bristles bristles 130, which are made large and soft, the body portion 110 and the head portion 120 of the toothbrush is less rigid and hard deformation of the toothbrush It is desirable to make it using a hard material so as not to bend too much in brushing.

After the double injection process, the cooling process (S400) and the mold opening process (S500) are additionally performed as in FIG. 3.

As shown in FIG. 5, the toothbrush includes a toothbrush body portion 110 and a toothbrush head portion 120 and the toothbrush head portion extending from the toothbrush body portion 110 and supporting the bristle 130 while brushing teeth. It is configured to include a bristle 130 is fixed to the upper surface of the 120.

The body portion 110 may be used in various forms, such as having a straight form or having a wave shape for the convenience of the gripped hand during tooth cleaning.

Toothbrush head portion 120 extending from the body portion 110 is the same material as that of the body portion 110 to support the bristle 130 so that the bristle 130 is in contact with the teeth when brushing the tooth 130 It is common to be made of resin.

Conventionally, the bristles are coupled to the head part by the method of hair transplantation, and thus, a hair transplant hole capable of accommodating and fixing a part of the bristles should be formed in the head part, so as to stably form a plurality of the hair removal holes. The thickness and width of the head portion had to be secured, and the bristles could not be formed at positions spaced apart from the edges of the head portion, so that it was difficult to brush the narrow spaces in the oral cavity, and the feeling of use was dull.

However, when the bristles are manufactured by injection as presented in the present invention, it is not necessary to plant hair, and in implementing the same volume of the bristles, the thickness and width of the head part 120 can be further reduced. The bristles 130 may also be formed on the edge of the head 120, so that the bristles can easily be brushed by easily entering the narrow space in the oral cavity.

In addition, when the bristles 130 are formed in a part corresponding to the edge of the head part 120 by injection molding, and the remaining parts are formed by bristles, up to the edge of the head part 120. While the volume of the bristles 130 can be implemented, the inner part of the head portion 120 can implement the same volume as the existing bristles by hair transplanting, according to manufacturing conditions or consumer preferences, requirements, etc. The injection molding method may be applied to only a part of the part 120, or a mixture of injection and hair may be applied.

In addition, when the bristle 130 is manufactured by injection, it has a cross-sectional shape having a plurality of corners, such as a triangle, a square, a polygon, a semicircle, a crescent, or a curved edge in which concave portions and convex portions are successively formed alternately. Embodiments having a cross-sectional shape can be easily implemented, and inherent oral contact and cleaning properties that cannot be realized in the bristle 130 having a circular cross section, and the clearance between the bristle 130 and the cleaning liquid are attached. It is possible to realize the unique bending direction according to the characteristics, the direction of the pressing force or the direction of motion.

When forming the bristles 130 to have a cross-sectional shape having a plurality of corners, such as a triangle, a square, a polygon, a semicircle, a crescent, or a cross-sectional shape having curved edges in which concave portions and convex portions are alternately suspended, the bristles 130 have a circular shape. Compared to the case having a cross section, the spacing between the bristles 130 may be more expanded, or the contact surface with the cleaning solution may be further expanded, so that a larger amount of the cleaning solution may be contained and applied.

The bristles 130 are not implanted into the toothbrush head 120 as described in FIGS. 3 and 4, but are manufactured by injection molding. That is, the bristles 130 are also manufactured by the injection molding method, or the injection molding the body 110 and the head 120 at the same time as the injection molding the body portion 110 and the head portion 120 in the injection molding method After the production in the manner of the bristle 130 again it is possible to be produced in a double injection method using a different resin material.

Particularly, in the case of double injection, a hard material may be used in the case of an injection molded product, and a soft material may be used in the case of an injection molded product, which is determined by the material of the resin to be injected. In the case of first injection, a resin of polypropylene or PCTA material is preferably used. In the case of later injection, a resin of nylon or polybutylene telephthalape (PBT) material is preferably used.

In addition, in the case of double injection, after the body portion 110, the head portion 120 and the bristles 130 are produced by the injection molding method, the edge of the head portion 121 or the bristles 130, that is, It is also possible to manufacture by double injection in a soft material for the part where the contact with teeth or gums occurs frequently during tooth cleaning.

The soft material may be double-injected into the gripped portion of the handle portion, the soft material injected into the grip portion 121 of the head or the gripped portion of the handle portion may use a thermoplastic plastic elastomer (TPE), and Like this, when the insects are injected with soft materials to give soft properties, they can be used for medical, laboratory, cosmetic, infant, and elderly.

In addition, the body portion 110, the head portion 120, or the bristles 130, PCL (polyε-caprolactone), PLA (polylactic acid), Diol / Diacid-based Aliphatic polyester, PG (polyglycolic acid), Polyphosphate ester, It may be composed of a biodegradable resin based on one or a mixture of two or more of polyphosphazenes.

When composed of the biodegradable resin as described above, while giving environmental friendliness according to the accelerated decomposition rate, even when in contact with the human body, due to the eco-friendly biodegradation characteristics, the skin generated by contact with, or ingestion of existing artificial composites There are no safety or health problems such as irritation, body accumulation, and carcinogenesis, so it can be safely used for medical, laboratory, cosmetic, infant, and elderly.

In the shaping of the bristles 130 as a model, the biodegradable synthetic composition is applied by adjusting the additive composition of the biodegradable resin and other polymers, lubricants, and emulsifiers so as to realize elasticity or flexibility suitable for use of the toothbrush. A melt made of a polymer as a raw material can be injected into a fibrous shape to stably form a plurality of hairs having a micro size or a hair bundle composed of a plurality of hairs.

Figure 6 shows a perspective view before the double injection of the toothbrush by injection molding according to another embodiment of the present invention.

As shown in the figure, the head portion 120 and the body portion 110 of the toothbrush are formed by injection molding, but a plurality of holes of a predetermined size are formed on the upper surface of the head portion 120, that is, the portion where the bristles are to be formed. 124 and the head portion 120 forms a hollow portion 123, the resin for the double injection in the end portion of the head portion 120 or the portion where the body portion 110 and the head portion 120 is connected The inlet 122 is provided, but the resin inlet 122, the hollow part 123, and the hole 124 are provided to be connected to each other.

When the resin is injected into the resin inlet 122, the head part 120 serves as another mold, and the injected resin protrudes out of the hole 124 provided on the top of the head part 120 to form bristles. It is possible to do

The hole 124 may be provided with a plurality of large and small diameters so that thick hairs and thin hairs are simultaneously formed, and the hollow portion 123 has a shape in which the middle portion is shallow or deep, so that the long hairs and the short hairs simultaneously. It is also possible to create it. In addition, the direction in which the holes 124 are formed may not be provided at right angles to the upper surface of the head portion 120, but may be inclined so that the bristles may have a predetermined inclination angle rather than perpendicular to the upper surface of the head portion 120.

7 to 9 are views showing several different embodiments of the toothbrush by the injection molding method according to the present invention.

As shown in Figure 7 it is possible to be provided with a different thickness of the bristles (140,141) produced by the injection molding method. The bristles having different thicknesses of the bristles are provided for proper cleaning according to the appearance of the teeth. In the case of the bristles provided in FIG. 7, the bristles 140 have a thick shape on the outside and thin bristles on the inside. Although shown), it will be seen that it is possible to include both the thick form and the parent of the possible form, regardless of the above arrangement. As described above, the two or three or more kinds of simulated thicknesses may be freely provided according to the shape of the mold to be injected or the shape of the hole of FIG. 6.

As shown in Figure 8 it is possible to be provided with a different length of the bristle (150,151) produced by the injection molding method. The bristles having different lengths of the bristles are also provided for proper cleaning according to the appearance of the teeth. In the case of the bristles provided in FIG. 8, long bristle 150 is disposed outside and relatively short bristle 151 inside. Although it is shown that it is provided, it will be seen that it is possible to include both a long hair and a short hair without regard to the above arrangement. As described above, having two or three or more kinds of hair lengths may be freely provided according to the shape of the mold to be injected or the shape of the hole of FIG. 6.

As shown in Figure 9 it is possible to be provided with different angles set up from the head portion 120 of the bristles (160,161) produced by the injection molding method. The bristles are provided with different angles of the bristles so that proper cleaning is performed according to the appearance of the teeth. In the case of the

bristles

160 and 161 provided in FIG. Although illustrated as having an inclination angle to the right in the drawings, it will be seen that it is also possible to have different angles in different directions without regard to the above arrangement. As described above, an angle with respect to the two or three or more kinds of the simulation heads 120 may be freely provided according to the shape of the mold to be injected or the shape of the hole of FIG. 6.

Figure 10 shows a front view and a left side view having a brush of various forms in the embodiment of the toothbrush by the injection molding method according to the present invention.

Conventional toothbrushes are provided in the form of the toothbrush head is planted in the general form, so that only one side of the head portion 120 is usually planted, the upper surface of the head portion 120 during toothbrush manufacturing by the injection molding method according to the present invention In addition, the bristles may be manufactured to be provided in at least two directions of the top, bottom, left side, and right side (170, 180, 190). Therefore, toothbrushes having various types of brushes such as 90 °, 180 °, 270 °, and 360 ° may be manufactured.

When the head portion 120 has a cross-sectional shape such as an ellipse or a circular shape instead of a rectangular cross section, the head portion 120 has an angle or a direction different from one side surface of the head portion 120 and one side surface 120 of the head portion 120. Partially formed along a curved surface of the head portion 120 of the entire outer surface of the head portion 120, including the other side, or 360 ° forward over the entire outer surface of the head portion 120 It can also be formed.

Toothbrushes that are conventionally planted when manufactured in the manner described above can brush only one side of the top or bottom surface of the tooth, but in the case of toothbrushes having angles in various directions emitted from the head, efficient tooth cleaning is effective. .

11 is an assembled perspective view showing a toothbrush by injection molding according to another embodiment of the present invention.

As shown in the figure, the toothbrush indicates that the toothbrush can be used not only for a toothbrush having a handle but also for a toothbrush using a conventional electric device.

That is, the toothbrush by injection molding according to the present invention can also be used in the case of a toothbrush using an electrical device commonly used as the name of the electric toothbrush.

That is, the bristles 130 are driven in the toothbrush 130 which is connected to the drive unit for driving the bristles 130 and is composed of a body part 110, a head part 120, and the bristles 130 by electrical connection. Can be used as a method of molding.

In the case of the injection molding, as in the case of FIGS. 5 to 10, the length of the hair is different, the thickness of the hair is different, the hair angles of different hairs, and those having various hairs can be implemented.

In addition, if the length of the hair is too long, there is a risk of cutting, if too short it is difficult to clean the teeth should be provided with an appropriate length. In the case of the bristles are usually planted 10mm to 13mm used but longer or shorter than the above It is possible. Preferably 5 mm to 20 mm can be used.

In addition, if the thickness of the simulation is too thick, it does not exert an adequate effect on the cleaning of the teeth, and if the thickness is too thin, there is a difficulty in manufacturing as well as the risk of cutting. Therefore, a thickness of an appropriate thickness should be provided. In the case of the bristles which are usually planted, 0.1mm to 0.2mm is used, but in the case of double injection, since it is possible to thin very much, 0.01mm to 0.2mm may be used.

And the angle with respect to the simulation head portion 120 is also preferably provided within a certain angle. When the hair is provided with a shape that is too laid down, that is, when the shape of the hair that extends upward from the head 120 is too oblique, there are difficulties in production as well as difficulties in production. Therefore, an appropriate angle of hair must be provided and preferably 70 ° to 110 ° can be used.

In addition, the bristles 130 to 161 provided by all the above methods to produce a bristle containing the antimicrobial material or aromatic material after the bristle fabrication by mixing the antimicrobial material or aromatic material in the resin when the bristle (130 to 161) manufacturing. It may be.

What has been described above is only one embodiment for carrying out the present invention, and the present invention is not limited to the above-described embodiment, and the present invention is made without departing from the gist of the present invention as claimed in the following claims. Anyone with ordinary knowledge in this field will have the technical idea of the present invention to the extent that various modifications can be made.

Claims

A body part connected to the driving part of the electric toothbrush or forming a grip part of the toothbrush;

A head portion extending from the body portion to support the bristles at the bottom of the bristles; And

Brush head which is located in the head portion and directly in contact with teeth when brushing teeth; In the toothbrush composed of,

The bristle is characterized in that the toothbrush is produced by the injection molding method.
The method of claim 1,

The injection molding method is a toothbrush, characterized in that the injection molding method that the body portion, the head portion and the bristles are manufactured at the same time.
The method of claim 1,

The injection molding method is a toothbrush, characterized in that the bristles are manufactured by the method of double injection molding after the body portion and the head portion is manufactured by the injection molding method.
The method of claim 3, wherein

The double injection molding method is a toothbrush, characterized in that by the micro-injection method.
According to claim 1, The injection molding method,

Toothbrush which is formed by integrally injection molding the body portion, the head portion, the bristles, the injection portion of the head portion or the portion corresponding to the distal end of the bristle with another material.
The method of claim 1,

The injection molding method is manufactured by the injection molding method of the body portion and the head portion, wherein the head portion is a resin inlet, the head portion is formed a plurality of holes to create bristles, the head portion of the inner surface of the hollow portion is formed and the resin The injection hole, the hollow portion and the plurality of holes are injection molded so as to be connected to each other, the toothbrush characterized in that by double injection to form a bristles out of the hole connected to the hollow portion by injecting the resin into the resin inlet.
The method of claim 6,

Toothbrush is characterized in that the resin inlet is provided at the end of the head portion.
The method of claim 1,

The bristle is a toothbrush, characterized in that the bristles having two or more different thickness.
The method of claim 8,

Toothbrush bristle, characterized in that the thickness of 0.01mm to 0.2mm.
The method of claim 1,

The bristle is a bristle, characterized in that the bristle having two or more different lengths.
The method of claim 10,

Toothbrush is characterized in that the length of 5mm to 20mm.
The method of claim 1,

The bristles are toothbrushes, characterized in that the bristles having different angles from the bottom surface of the head portion.
The method of claim 12,

Toothbrush is characterized in that the angle is 70 ° to 110 °.
The method of claim 1,

And the bristle comprises a directional material.
The method of claim 1,

The bristle is characterized in that it comprises an antimicrobial material.
The method of claim 1,

The bristle located in the head portion is a toothbrush, characterized in that the bristle is located on at least two of the top, bottom, right side and left side of the head portion.
According to claim 1, wherein the bristle,

Toothbrush is formed on a part of the entire outer surface of the head portion including one side of the head portion and the other side having an angle or direction different from one side of the head portion.
According to claim 1, wherein the bristle,

Toothbrush is formed on the entire outer surface of the head portion, including one side of the head portion and the other side having an angle or direction different from the one side of the head portion.
The method of claim 1, wherein the body portion, head portion, or bristles,

PCL (polyε-caprolactone), PLA (polylactic acid), Diol / Diacid Aliphatic polyester, PG (polyglycolic acid), polyphosphate ester, characterized in that composed of a biodegradable resin based on one or two or more mixtures of polyphosphazene toothbrush.
According to claim 1, wherein the bristle,

It is formed by injecting a biodegradable synthetic polymer melt made of one or more of a mixture of polyε-caprolactone (PCL), polylactic acid (PLA), diol / diacid-based aliphatic polyester, polyglycolic acid (PG), polyphosphate ester, and polyphosphazene. Toothbrush characterized in that.
According to claim 1, wherein the bristle,

Toothbrush is formed on the edge of the head portion.
According to claim 1, wherein the bristles produced by the injection molding method,

Toothbrush, characterized in that formed on only a portion of the head.
The method of claim 22, wherein the bristle,

Toothbrush, characterized in that formed on the portion corresponding to the edge of the head portion.
The method of claim 22 or 23,

Toothbrush is characterized in that the bristles are formed by the hair on the remaining portion of the head.
According to claim 1, wherein the bristle,

Toothbrush characterized in that it has a cross-sectional shape having a plurality of corners, such as triangles, squares, polygons, semicircles, crescents.
According to claim 1, wherein the bristle,

Toothbrush characterized in that the concave portion and the convex portion has a cross-sectional shape having a curved edge alternately continuous.
Mold preparation step for manufacturing a toothbrush;

Closing the mold;

Injection molding step;

Mold cooling step; And

Removing the toothbrush from the mold;

Toothbrush manufacturing method comprising a.
The method of claim 27,

Toothbrush manufacturing method characterized in that the mold is a micro mold.
Mold preparation step for manufacturing a toothbrush;

Closing the mold;

Manufacturing by injection molding the body and head of the toothbrush;

Preparing by the method of double injection on the bristles;

Mold cooling step; And

Removing the toothbrush from the mold;

Toothbrush manufacturing method comprising a.
The method of claim 29,

Toothbrush manufacturing method characterized in that the mold is a micro mold.
The method of claim 29,

The bristle is a toothbrush manufacturing method characterized in that it is manufactured using the injection injection method.