KR100772141B1 - Toothbrush forming method and toothbrush using for the same - Google Patents

Abstract

A toothbrush forming method and a toothbrush made by the same are provided to use a thermoplastic material that is not harmful to a human body, and to form a soft buffering material on a connection portion as well as a head. A toothbrush includes a toothbrush head(110), a handle(150), a connection portion(130), and a soft buffering material portion. A bunch of bristles are formed on the head. One or more slipping prevention soft materials are formed on the handle. The connection portion integrally connects the head and the handle. The soft buffering material portion is formed integrally to enclose the rear, sides and a part of the front of the head, and the front, the rear and both sides of the front portion of the head. A penetrating hole is formed on the handle to make upper and lower caps attached thereto.

Description

Toothbrush forming method and toothbrush using for the same}

1 is a process chart showing to explain the molding method of a toothbrush according to an embodiment of the present invention,

Figure 2 is a rear view showing the state of the first injection molded toothbrush body by the method of forming a toothbrush according to a preferred embodiment of the present invention,

Figure 3 is a front view showing a state of the first injection molded toothbrush body by the toothbrush molding method according to a preferred embodiment of the present invention,

Figure 4 is a schematic view showing the front, side and back of the connecting portion of the toothbrush body first injection-molded by the toothbrush molding method according to the present invention,

5 is a perspective view illustrating main parts of rails, irregularities, and concave grooves of the toothbrush body first injection-molded by the method of forming a toothbrush according to the present invention;

Figure 6 is a perspective view and a cross-sectional view showing a state of the rail is formed in the toothbrush head and the connecting portion of the toothbrush body first injection-molded by the toothbrush molding method according to the present invention;

Figure 7 is a perspective view and a cross-sectional view showing the appearance of the irregularities formed in the toothbrush head and the connecting portion of the toothbrush body first injection-molded by the toothbrush molding method according to the present invention;

8 is a schematic perspective view showing the arrangement relationship between the primary injection-molded rail and the unevenness by the toothbrush molding method according to the present invention;

9 is a cross-sectional view schematically showing the main portion of the toothbrush manufactured by the method for forming a toothbrush according to the present invention;

10 is a perspective view illustrating a toothbrush manufactured by a method for forming a toothbrush according to a preferred embodiment of the present invention;

11 is a front view of a toothbrush according to the present invention;

12 is a rear view of the toothbrush according to the present invention;

13 is a partial perspective view illustrating the upper and lower caps and through holes of the handle part in the toothbrush according to the present invention;

14 is a partial cross-sectional view illustrating the upper and lower caps and the through-holes of the handle part of FIG. 13.

<Explanation of symbols for main parts of the drawings>

100: toothbrush 110: toothbrush head

111: brush head 112: hair insertion hole

113: rail 114: irregularities

115: concave groove 130: connection portion

Reference numerals 131: rail 133: concave groove 150: handle 151: upper and lower cap 152: soft material for preventing slippage 153: logo member 154: through hole 170: soft buffer material part

delete

delete

delete

delete

The present invention relates to a toothbrush molding method and a toothbrush using the method, and more particularly to a predetermined structure in order to make the bonding force strong and robust in manufacturing a toothbrush using a different material melting point of the heterogeneous thermoplastic material Rails and a plurality of irregularities are injection-molded on the back of the head of the toothbrush body, the front, rear and both sides of the connection part, and a thermoplastic material having a high melting point is injected through the injection part of the toothbrush head and the connection to be firmly thermally fused. It relates to a toothbrush molding method and a toothbrush using the method for forming a soft buffer material to join.

In the case of a general toothbrush, the tip is made of various shapes, such as a rod-shaped or rectangular parallelepiped made of a hard material, and is manufactured by raising a bunch of napes on one side of the upper surface.

Such a hard toothbrush body has a problem of causing an impact on the surface of the weak gums or other periphery when the toothbrush is in strong contact, and causing a wound in the oral cavity, which is undesirable for oral hygiene.

Therefore, Japanese Patent Application Laid-open No. Hei 4-6926 installs a thick soft elastic material on the upper surface of the brush protruding end of the toothbrush main body, and the root side of the brush hair is placed on the soft elastic material. Japanese Unexamined Patent Application No. 57-148332 proposes that the cushion rubber is fixed to the periphery of the brush attached to the toothbrush body.

However, although Japanese Unexamined Patent Application Publication No. Hei 4-6926 describes obtaining a buffering action between the brush body and the hair planted in the brush body, there is no mention of giving elasticity to the toothbrush body itself. [0007] In Patent Application No. 57-148332 there is no mention of specific means for fixing cushion rubber around the periphery of the brush. For this reason, even if the cushion rubber and the toothbrush body are adhered with an adhesive or the like, when the toothbrush is inserted into the oral cavity, the hygiene and the adhesion between the cushion rubber and the toothbrush body are unclear.

In other similar designs, DE3628722, Germany, provides a brush head with a toothbrush that coats the sides and the front by injection molding.However, when a simple injection molding method is used, foreign substances with different melting points, adhesive forces, and shrinkage are firmly fused together. There is no mention at all, and it is related to the design which is impossible to carry out by the usual injection molding method.

Accordingly, the present applicant has filed the Republic of Korea Utility Model Registration No. 1993-15016 and Republic of Korea Patent Application No. 1994-003003 that improve the above problems.

When the applicant applied for and registered No. 1994-003 (body forming manufacturing apparatus of a toothbrush for attachment of a buffer member) as follows.

In the apparatus for manufacturing a body of the toothbrush for attaching the shock absorbing member, a plurality of shock absorbing member fastening protrusions were formed on the rear surface of the brushed planting part of the toothbrush body, and they minimized the separation between members during use by maximizing the coupling area with the shock absorbing member. A plurality of second sprues are interposed between the fixed side device plate and the fixed side template so as to coincide with the gate holes of the plurality of cavities, and the upper cavity of the fixed side template includes: A gate interlocked with the second sprue was formed at the inlet side of the narrow portion of the upper cavity, and at the same time, two hooking protrusions were formed, and at the center of the core plate which was in airtight contact with the fixed side template and the parting line, A lower cavity having a narrow portion and a wide portion having the same width as the cavity is formed, but a recess having a surface roughness of 0.1 to 0.45 is formed on the bottom side of the wide portion. To develop a toothbrush with a shock-absorbing function of the toothbrush, while at the same time, the uneven part formed with a plurality of uneven protrusions protruding from the back of the brushed planting part having a plurality of hair insertion holes, including the front end, the left and right end of the tip, and the cushion member coupling hole The toothbrush body molding for attaching the shock absorbing member is formed to be lower than the thickness of the member and the partial wall of the uneven portion is formed by the left and right walls so that the resin for the cushioning member acts as a guide of the molding resin and prevents leakage during the press-fit. Developed.

In the case of the apparatus for manufacturing a body of the toothbrush for attaching the shock absorbing member as described above, the shock absorbing member formed of a completely different heterogeneous elastic material may be easily formed on the back surface of the brushed planting part of the primary molded toothbrush body. There is a problem that the molding range is limited to the back of the brushed planting portion of the toothbrush body.

In addition, conventionally, the neck part is weakened by penetrating through the neck part, and there is a problem of weakening the bonding force between the soft material and the primary molded body, and the concave part damages the teeth and the gums when brushing teeth, and serves as a simple guide. Rather, it was found to be a problem by playing a significant role in strengthening the bond strength.

In the case of toothbrushes inserted and used in the oral cavity at the time when the awareness of environmental hormones for products made of synthetic resins is highlighted, soft cushioning is applied not only to the head portion in which the brushed material of the toothbrush body is formed, but also to the connection portion inserted into the oral cavity. There is a demand for a product having a material formed therein.

However, in the case of thermoplastic materials having different materials used in the manufacture of toothbrushes, the process of injecting the soft-buffing material, which is a thermoplastic material having a high melting point, which is not sticking to each other, and a secondary injection product, is injected into the toothbrush body, which is a primary injection product having a low melting point. It is difficult in the injection molding, and it is technically difficult to extend and attach the heterogeneous buffer member to the connection portion with a high melting point only by a configuration in which a plurality of irregularities of the present application filed and registered by the applicant of the present application is registered simply.

Accordingly, the present invention has been made to solve the conventional problems as described above, the object of the present invention is to use a thermoplastic material that is harmless to the human body, the soft buffer material is a heterogeneous thermoplastic material having a high melting point injection molding to the toothbrush body It is to provide a toothbrush molding method and a toothbrush using a method of forming the toothbrush so that the bonding force is strong and fusion is made, not only the toothbrush head but also the connection portion connected to the handle.

In addition, another object of the present invention is to form a soft cushioning material to cover the entire back of the toothbrush head and the connection portion of the toothbrush at the time when the harmful effects of environmental hormones are highlighted by the consumer's concern, Not only do not make an unpleasant sound when hitting the connection, there is no scratch caused by the impact of the tooth and toothbrush head and the connection, and even if the toothbrush head deep into the mouth to clean the molar end inside the mouth, the teeth and gums are effectively protected, It is to provide a toothbrush molding method and a toothbrush using the method to ensure that the safety of the thermoplastic materials can be manufactured to meet the needs of the consumer.

The present invention for achieving the above object, while molding a toothbrush body by injecting a thermoplastic material into a predetermined mold through injection, the toothbrush body is a toothbrush head having a hair insertion hole into which a plurality of bristles are inserted, the handle And a connection part integrally connecting the toothbrush head and the handle, wherein a plurality of the back and side surfaces and the front part of the toothbrush head having the parent insertion hole are formed between one or more rails and the rails on the front, rear and both sides of the connection part. The first injection molding step of the irregularities of the injection molding; And a thermoplastic material having a high melting point of the toothbrush body and another material is injected through injection into a predetermined mold on which the toothbrush body injection molded through the first injection molding step is seated, and the thermoplastic material is formed on the toothbrush head and the connection part. One or more rails and a plurality of concavities and convexities are combined to form a soft buffer material, wherein the soft buffer material is formed on a part of the rear and side surfaces and the front surface of the toothbrush head, and the front, rear and both sides of the connection portion. Disclosed is a method for molding a toothbrush comprising a; secondary injection molding step to be molded integrally.

The present invention for achieving the above object discloses a toothbrush manufactured by the molding method of the toothbrush.

In addition, the toothbrush is a toothbrush head formed with a plurality of bristles; A handle on which at least one non-slip soft material is formed; A connection unit integrally connecting the toothbrush head and the handle; And a soft buffer material unit integrally molded to surround both the front and rear sides and both sides of the rear and side surfaces and the front portion of the toothbrush head.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings.

In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a process diagram showing a method for forming a toothbrush according to a preferred embodiment of the present invention, Figures 2 to 4 are first injection molded toothbrush body by the molding method of the toothbrush according to a preferred embodiment of the present invention The rear view and the front view showing the state of the schematic diagram showing the front and side and back of the connection.

Toothbrush molding method according to a preferred embodiment of the present invention, as shown in Figure 1, comprises a first injection molding step of injection molding the toothbrush body, a second injection molding step of injection molding the soft buffer material portion. .

First, in the first injection molding step, a toothbrush body is molded by injecting a thermoplastic material into a predetermined mold (not shown) through injection.

At this time, the toothbrush body, as shown in Figures 2 to 4, a toothbrush head 110 having a hair insertion hole 112 is inserted into the bristle bristle 111, the handle 150, the toothbrush head Consists of a connection portion 130 to integrally connect the 110 and the handle 150.

In this case, the bristles 111 may be used as a bundle manufactured by Dupont, a representative company in the United States as a representative nylon or silicone of the bundle, as shown in FIG. If you look at the planted in the pin (not shown) to press the bristle (111) with a strong pressure can be seen that tightly clogged in the toothbrush head 110, this process is made by planting through a model work machine (not shown) Since it corresponds to a well-known technique, detailed description is abbreviate | omitted.

In addition, a plurality of irregularities 114 are injection-molded between one or more rails 113 and the rails 113 in which the unevennesses are integrally continuous to the rear surface of the toothbrush head 110 in which the mother insertion hole 112 is formed.

At this time, the toothbrush head 110 forms at least one rail 113 and a plurality of concave-convex 114 on the rear surface thereof, and the rail 113 has concave-convex shapes formed in succession integrally as shown in FIG. And the streamlined shape, and the unevenness 114 of the unit is formed on both sides of the rail 113, but the upper shape of the unevenness facing from both sides of the rail 113 is formed differently. desirable.

This can also be confirmed through the arrangement relationship between the rail and the unevenness shown in FIG. 8.

In addition, the unevenness 114 is formed on both sides of the rail 113, and in the recessed portion of the rail 113, the unevenness 114 facing from both sides of the rail 113 is the rail 113. It is formed higher than the height of, the convex portion of the rail 113 is configured so that the fine groove 114-1 is formed on the upper surface of the concave-convex 114 facing from both sides of the rail 113.

In addition, the toothbrush head 110 forms a plurality of concave grooves 115 on the rear surface of the portion where the hair insertion hole 112 into which the bristle bristle 111 is inserted is not formed.

The convex and convexity 114 is convexly installed in the portion where the bristle bristle 111 is planted, and the concave groove 115 is finely formed where the bristle 111 is not planted in the toothbrush head 110. The concave and convex concavities and convexities are formed on the entire rear surface of the 110 to increase the binding force through the expanded space.

As shown in FIGS. 2 to 4, the connection part 130 includes a plurality of rails between the rails 131 and one or more rails 131 having unevenness continuously connected to the front, rear, and both sides of the connection part 130. Unevenness 114 is injection molded.

The connection portion 130 forms at least one rail 131 and a plurality of unevenness 114 on the front, rear, and both sides thereof, and the rail 131 is unevenly continuously formed as shown in FIG. 6. It is made of a combination of the right angle and streamline shape, the unevenness 114 is formed on both sides of the rail 131, but the upper shape of the unevenness 114 facing from both sides of the rail 131 is different from each other To form.

In addition, the unevenness 114 is formed on both sides of the rail 131, in the concave portion of the rail 131, the unevenness 114 facing from both sides of the rail 131 is the rail 131 It is formed higher than the height of the rail 131, the convex portion so that the fine groove 132-1 is formed on the upper surface of the concave-convex 114 facing from both sides of the rail 131, the rail 131 And a plurality of concave grooves 133 are formed in portions where the unevenness 114 is not formed.

In addition, the number of rails 113 and 131 installed on the toothbrush head 110 and the connection part 130 is not particularly limited, but is two to three on the back surface of the toothbrush head 110 and the connection part 130. It is preferable to install two to three pieces at the rear side, one at the front side, and one at the left and right sides.

At this time, the concave-convex 114 shown in Figs. 6 and 7 used in the toothbrush head 110 and the connecting portion 130 of the present invention is configured independently, so that the heat fusion between the thermoplastic materials of different materials to the maximum As the rails 113 and 131 are formed in a single line, the rails 113 and 131 are formed by a complex arrangement of the streamline and the right angle, thereby widening the heat fusion surface and doubling the heat fusion function between the thermoplastic materials having different materials.

In addition, the present invention is configured in a variety of types to take full advantage of the concave-convex (114), and in a regular order to take full advantage of its various functions, may be arranged by changing the order of the concave-convex (114) as necessary. The unevenness 114 is an array of different shapes, and the fusion between the toothbrush body and the soft buffer material is very firmly strengthened during the second injection molding process for molding the soft buffer material part, even if the thermoplastic material has different properties. It can be firmly fixed through heat fusion.

In particular, the rail 113, 131 is coupled to the wire and the right angle as shown in Figure 6 by the mold work so that the other thermoplastic material of the toothbrush body and the soft buffer material 170 can be more firmly and strongly attached. In particular, even when the melting point of the thermoplastic material of the soft cushioning material portion 170 is very high, it will bind firmly and strongly to each other.

5 is a perspective view illustrating main parts of rails, irregularities and concave grooves of the toothbrush body that are first injection-molded by the method of forming a toothbrush according to the present invention.

As shown in FIG. 5, the toothbrush body starts from the bottom of one side of the connection part 130, and has one side of the toothbrush head 110, an upper end (head head end), the other side, and the connection part 130 of the toothbrush head 110. It further forms one rail 121 which concave and convex are integrally continued to the bottom of the other side, and further forms concave-convex 114 and concave grooves 123 on both sides of the rail 121. .

The rail 121 shown in FIG. 5 is integrally formed on the side surface of the toothbrush body, and is formed to a size of 1.88 mm or less, and is formed to a size of 1.83 mm or less even in the case of the unevenness 114. In addition, the functions of the rails 121 and the concave-convex 114 shown in FIG. 5 also perform the same functions as the above-described rails 113 and 131 and the concave-convex 114.

In addition, the rails 113 and 131 rectify and spread evenly the injected thermoplastic material when the thermoplastic material of another material is injected through the nozzle at high pressure, and the thermoplastic material also spreads the rails 113 and 131. It serves as a guide to ensure strong adhesion.

In addition, the rails 113 and 131 having grooves in which curved and right angles are combined, and the irregularities 114 and concave grooves 115 and 133 are strong between the toothbrush body and the soft material when the soft buffer material is injected through the nozzle. It has a strong adhesive force, and the rails 113 and 131, the unevenness 114 and the concave grooves 115 and 133 have double the strong locking action on the soft buffer material, and the coupling force also doubles, thereby increasing the external impact and There is no separation even if the temperature difference is severe.

Next, the second injection molding step injects a thermoplastic material of a different material from the toothbrush body into a predetermined mold (not shown) on which the toothbrush body injection molded through the first injection molding step is seated.

Through this, the thermoplastic material injected through injection is combined with one or more rails 113 and 131 formed in the toothbrush head 110 and the connection part 130 and the plurality of irregularities 114 by injection molding. As shown in FIG. 12, the soft buffer material portion 170 is molded.

In this case, the melting point of the thermoplastic material for forming the soft buffer material 170 is higher than the primary injection, that is, the melting point of the toothbrush body, and the toothbrush head 110 and the connection portion when the soft buffer material 170 is formed. A portion of the rails 113 and 131 and the concave-convex 114 formed on the 130 may be melted to infiltrate the thermoplastic material to form the soft buffer material unit 170.

In addition, the soft buffer material portion 170 is integrally molded on both the front and rear and both sides of the rear and side and front portions of the toothbrush head 110 and the connecting portion 130.

In addition, the rail 113 and the concave-convex 114 and the concave groove 115 formed on a portion of the rear surface, the side surface and the front surface of the toothbrush head 110, and the front surface, the side surface and the rear surface (rear surface) of the connecting portion 130 are formed. The rails 131, the unevenness 114, and the concave grooves 133, which are to be used, widen the thermal fusion area so that the thermoplastic material injected during the second injection molding is firmly coupled.

As described above, in the case of bonding through heat fusion between thermoplastic materials having different materials, the rails 113 and 131 formed on the toothbrush head 110 and the connecting portion 130, the unevenness 114, and the concave groove ( Strong bonding is possible by the fixing action of the 115, 133, even if the material with a high melting point is made firm attachment.

In addition, the hardness of the soft buffer material portion 170 integrally formed through the second injection molding step is preferably 60A ~ 72A. This is because when the hardness (Durometer, Shore Hardness) is less than 60A work is too soft to extinguish the shock of the handle 150 when the toothbrush work, and the toothbrush head 110 can transmit the shock to the teeth and gums, If the hardness is higher than 72A, the function as a soft buffer material may be remarkably degraded, which may impact the teeth and the gums.

In addition, using the soft cushioning material 170 having the configuration described above, even if the toothbrush head and the connection part hits the teeth when brushing teeth does not generate a scratch (scratch) or unpleasant sound, soft touch and good external impact Has very strong properties.

In addition, the soft buffer material portion 170, which is a secondary injection product, is injected into a mold heat-treated and polished to be combined with the toothbrush body. This is because when the mold is polished, it adds slipperiness to the soft buffer material, so it feels good when brushing teeth and suppresses noise when the tooth and the soft buffer material collide. Of course, because the soft cushioning material portion 170 is polished because it looks good.

In addition, the thermoplastic material used in the primary injection molding process of the present invention may be formed to include a fragrance. In this case, when the toothbrush main body, which is the primary injection molding product, is added at a content of 100% by weight, the fragrance extractant may be added up to 3.0 to 5.0% by weight, and an optimal amount of fragrance diffuser is preferably about 4.3% by weight. The reason is that when the flavoring agent is added at 3.0% by weight or less, the effect is low because the smell is weak, and when it is added at 5.1% by weight or more, there is a problem in forming the toothbrush body, which is the primary injection product, and the fragrance is too unpleasant, causing discomfort. Because it can. In addition, the fragrance-dispersant may be added to the non-slip soft material that is injected into the thermoplastic material or the handle for injection molding the soft buffer material portion 170 as well as the toothbrush body that is the primary injection.

In addition, as the fragrance scenting agent, various fragrance scenting agents such as mint, lilac, acacia, herb, freesia, and xylitol can be selectively used.

When the thermoplastic materials of different materials are to be attached to each other, the melting points of the thermoplastic materials for forming the soft buffer material 170 are higher than or equal to those of the primary injection molding, that is, the toothbrush body. If the heat resistance temperature of the thermoplastic material for the soft buffer material unit 170 is higher than 15 degrees, the melting point is higher than the thermoplastic material of the toothbrush body, and the melting point is also very high when the difference is 23 degrees.

10 is a perspective view showing the configuration of a toothbrush manufactured using a toothbrush molding method according to a preferred embodiment of the present invention, Figures 11 and 12 are front and rear views of the toothbrush according to the present invention, Figures 13 and 14 is a partial perspective view and a partial cross-sectional view for explaining the upper and lower caps and through holes of the handle portion in the toothbrush according to the present invention.

Toothbrush 100 manufactured using the method of forming a toothbrush of the present invention, as shown in Figure 10 to 14, the toothbrush head 110, the one or more non-slip soft material 152 in which the bristle bristle 111 is formed. ) Is formed of a handle 150, the connection portion 130 for connecting the toothbrush head 110 and the handle 150 integrally, and a portion of the back and side and front of the toothbrush head 110 and the connection portion 130 It comprises a soft cushioning material portion 170 integrally molded to surround both the front and rear and both sides.

In addition, the non-slip soft material 152 formed on the handle 150 may be manufactured separately through a separate injection molding process, the position and the number is not limited, in the present invention three configurations as an example Indicated.

In addition, as shown in Figure 11, the thickness of the soft buffer material portion 170 integrally formed on both the front and rear and both sides of the rear and side and front and rear portions of the toothbrush head 110 and the connection portion 130. Is formed in the front portion of the toothbrush head 110 to a thickness of 0.9mm ~ 1.88mm, it is preferable to form both side portions and the connecting portion of 0.34mm ~ 0.83mm thickness of the toothbrush head 110. This is because by forming the soft buffer material 170 to the optimum thickness, the thicker the toothbrush head 110, the larger the space occupied in the oral cavity to solve the problem of inconvenience caused by brushing, and also protects the teeth and gums, as well as It reduces the use of expensive thermoplastic materials, thereby reducing the unit cost.

In addition, the handle 150 forms a through hole 154 to be attached and detached to the upper and lower caps 151 coated with a luminous material of a predetermined color.

At this time, the through-hole 154 may be formed in the first injection molding step or may be formed through a separate process thereafter, and the upper and lower caps 151 allow the family to store the toothbrush by applying a fluorescent material (glow) on the surface thereof. Even if it is provided with the color, it is easy to find your toothbrush.

In addition, the luminous color of the seven different colors, such as the same product to be able to easily find the toothbrush, and in particular, in the dark place the distinction becomes more clear.

In addition, the handle 150 may be configured to include a logo member 153, the name or logo of the sales company is engraved.

The soft buffer material used in the present invention uses only products that are harmless to the human body, and the warranty is a product that has received a certificate or a certificate from the US FDA or UPS. It can also be used as a certified, warranted, or approved product in line with and a UPS.

The present invention also uses a TPU UPT Tecoflex® EG-80A as a product of a soft cushioning material, which is a thermoplastic material, which is the world's best biocompatible product approved by the US FDA and UPS as described above.

In addition, TPU Estane® X1007 NAT 034 can be used as a soft buffer material.

Toothbrush manufactured by the molding method as described above, unlike the conventional toothbrush, when brushing teeth and gums hit the head and the connection part of the toothbrush, the soft cushioning material is prevented to prevent friction is not harmful to humans It won't scratch at all, providing an excellent effect of preventing scratches and protecting teeth and gums.

In particular, the existing toothbrush has an excellent effect of innovatively improving the problem of fusion in the present invention to cover the entire head and the connecting portion of the toothbrush body formed of a heterogeneous thermoplastic material of a high-thermoplastic material of high melting point.

In addition, the existing invention is a configuration that forms a through-hole in the neck portion is used where expensive soft buffer material is useless because of this there was a weak point in the neck portion, the present invention is a configuration that improves the problem more neck of the connection part A thin wrap around the entire neck area without penetrating the part provides a toothbrush that is low in material and free of particularly weak areas.

Although the present invention has been described in more detail with reference to the examples, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

According to the toothbrush molding method and the toothbrush using the method according to the present invention as described above, the injection molding of a soft buffer material, which is a heterogeneous thermoplastic material having a high melting point, in a toothbrush body formed of a structure in which a bonding force by injection molding is increased. Of course, the bonding force is increased, even if there is a strong impact or rapid heating and cooling during use, there is an effect that the separation phenomenon of the soft buffer material does not occur.

In addition, the toothbrush manufactured by the present invention, so that the soft buffer material with excellent material is accommodated up to the entire back surface of the toothbrush head and the connection portion of the toothbrush does not make an unpleasant sound during the process of cleaning the teeth, of course, the occurrence of scratches It does not, and the toothbrush goes deep into the mouth to clean the molar end, providing an excellent effect of preventing tooth and gum damage even if the toothbrush connection touches the gum or teeth.

In addition, the soft buffer material products that are used in the present invention is excellent in safety by using only the thermoplastic material harmless to the human body is guaranteed by the US FDA or UPS or equivalent agencies.

Claims (15)

Molding the toothbrush body by injecting a thermoplastic material through injection into a predetermined mold, the toothbrush body is a toothbrush head having a parent insertion hole into which a plurality of bristles are inserted, the handle, and the toothbrush head and the handle integrally connect A first injection molding step comprising a connection part, wherein a plurality of irregularities are injection-molded between one or more rails and the rails to the front, rear, and both sides of the rear surface, the side surface, and the front portion of the toothbrush head having the parent insertion hole formed therein; And Injecting a thermoplastic material having a high melting point of the toothbrush body and another material through injection into a predetermined mold on which the toothbrush body injection-molded through the first injection molding step is seated, the thermoplastic material formed on the toothbrush head and the connection part. The above-mentioned rail and a plurality of irregularities are combined with each other by injection molding to form a soft buffer material part, wherein the soft buffer material part is integrated into a part of the rear and side surfaces and the front part of the toothbrush head and the front, rear and both sides of the connection part. Second injection molding step to be molded into; Molding method of the toothbrush comprising a. The method of claim 1, The said rail is a shaping | molding method of the toothbrush characterized in that the unevenness | corrugation formed continuously and integrally formed in the shape which combined right angle and streamline. The method of claim 1, The irregularities are formed on both sides of the rail, but the molding method of the toothbrush, characterized in that the upper shape of the concave-convex facing from both sides of the rail are formed differently. The method of claim 2, The irregularities are formed on both sides of the rail, the concave portion of the rail in the concave and convexities formed on both sides of the rail is formed higher than the height of the rail, the convex portion of the rail facing on both sides of the rail Molding method of the toothbrush, characterized in that to form a fine groove on the uneven upper surface. The method of claim 2, And the toothbrush head further forms a plurality of concave grooves on the rear surface of a portion where the hair insertion hole into which the bristle bristles are inserted is not formed. The method of claim 2, The connecting part further comprises a plurality of recessed grooves formed in the portion where the rail and the unevenness is not formed. The method of claim 1, The toothbrush body further forms one rail which is concave and convex in one body, starting from the bottom of one side of the connecting part and extending from one side of the toothbrush head to the top of the top, the other side and the bottom of the other side of the connecting part. And irregularities and concave grooves are further formed on both sides of the rail. The method of claim 1, Hardness of the soft-absorbing material portion molded integrally through the second injection molding step is a molding method of the toothbrush, characterized in that 60A ~ 72A. The method of claim 1, The thickness of the soft buffer material formed integrally on both the front, rear, and both sides of the rear surface, the side surface, and the front portion of the toothbrush head is 0.9 mm to 1.88 mm thick to the front portion of the toothbrush head. Both sides of the head is formed with a toothbrush molding method of 0.34mm ~ 0.83mm thick. The toothbrush manufactured by the shaping | molding method in any one of the said Claims 1-9. The method of claim 10, The toothbrush includes a toothbrush head having a plurality of bristles; A handle on which at least one non-slip soft material is formed; A connection unit integrally connecting the toothbrush head and the handle; And A soft buffer material unit integrally molded to surround both the rear and side surfaces of the toothbrush head and the front and rear surfaces and both sides of the connection portion; Toothbrush configured including. The method of claim 11, Toothbrush, characterized in that the hardness of the soft buffer material is 60A ~ 72A. The method of claim 12, Toothbrush, characterized in that the thickness of the soft buffer material formed in the front portion of the toothbrush head is formed of 0.9mm ~ 1.88mm, both side portions of the toothbrush head is formed of 0.34mm ~ 0.83mm thick. The method of claim 13, The handle is a toothbrush, characterized in that to form a through hole to be detachable to the upper and lower caps coated with a luminous material of a predetermined color. The method of claim 14, At least one of the toothbrush body and the soft cushioning material portion consisting of the toothbrush head, the connecting portion and the handle is a toothbrush characterized in that it comprises a fragrance.

Images