KR20120036222A - Interchangeable toothbrushes - Google Patents

Abstract

PURPOSE: An interchangeable toothbrush is provided to improve bonding strength thereof and sanitation around a joint part. CONSTITUTION: An interchangeable toothbrush is constituted as follows. In the side of an interchangeable head(2), an under cut is formed to be 0.50-1.50mm high and 0.1-0.25mm wide. The bonding strength of the inclined direction in the longitudinal direction of the head is 3kgf or greater in brushing teeth. The attachment/detachment strength of the vertical direction is 2-4kgf. Two to four binding holes or binding jaws are formed in a toothbrush handle(1) and interchangeable head.

Description

Interchangeable toothbrushes

The present invention relates to a replaceable toothbrush, and more particularly, to satisfy the desire for economic and environmental friendliness obtained by replacing only the toothbrush head and at the same time, the inconvenience of detachable toothbrush on the characteristics of the replaceable toothbrush product. The toothbrush of the invention is designed to improve both the fatal problem that the replacement head may come off during brushing and brushing, and the disadvantages that toothpaste or foreign substances get stuck around the joint and often need to be cleaned. It is easy to attach and, on the contrary, when brushing, the replacement head does not fall out and maintains the proper bonding strength even after repeated removal and detachment. In addition, the present invention relates to a replaceable toothbrush made by improving the non-hygienic side due to the weakening of the binding force due to the gap around the joint and the attachment of foreign substances.

Most of the conventional toothbrushes are integrated with a toothbrush rod and a toothbrush head, and the general bristles do not become effective brushing because the bristles will open after a certain period of time to replace the toothbrush. In such a case, there was an unreasonable point in terms of economic feasibility because all of the toothbrush rods were discarded. In addition, all toothbrushes are made of plastic, so they have disadvantages in terms of environment friendliness when disposed of after use. Thus, in addition to such a conventional toothbrush, a replaceable toothbrush has been developed which makes it possible to use only a toothbrush head in exchange. However, since only the existing replacement toothbrush head is replaced and reused, there is an advantage in economical or environmental friendliness, but if the proper bonding strength is not sufficient due to the characteristics of the product, the replacement head may fall out when brushing. In some cases, it may not be easy to attach and reattach it several times, causing deformation of the toothbrush and the combined replacement head may not maintain the proper bond strength. Because of this, you will not be able to brush your toothbrush and will lose its functionality. In addition, since the existing replacement toothbrush has a coupling portion that couples the toothbrush rod and the replacement head, there is a gap around the gap, which is unreasonable in terms of weakening and hygiene of the replacement head.

Therefore, the toothbrush of the present invention has the disadvantage of lack of economical and environmental friendliness of conventional toothbrushes which are made of a toothbrush head and a toothbrush body integrally, and the replacement head is removed when brushing existing toothbrush heads, or vice versa when cleaning or replacing a toothbrush head. It is not easy to attach / detach and repeat the attachment / detachment several times so that the combined exchange head does not maintain the proper bond strength and all the disadvantages of attaching foreign matter to the bonding gap. It is a toothbrush made.

The attachment and detachment of the replacement head is performed by a force acting in the vertical direction with respect to the longitudinal direction of the head, so that the attachment and detachment strength in this vertical direction is made small to facilitate attachment and detachment during cleaning or replacement. In fact, when the consumer is brushing, the force acts in the horizontal direction or the inclined direction, and the replacement head falls out when brushing by the repetitive action of the force. Therefore, by increasing the bonding strength in the horizontal or inclined direction, it prevents the replacement head from falling out when brushing. In addition, the deformation of the toothbrush according to the repetition and detachment of the toothbrush disperses the force applied during the detachment and detachment, thereby maintaining the proper bonding strength.

The toothbrush bar is made of single injection and double injection molding methods using ordinary plastics (PP, ABS, PETG, etc.) and rubber (EPDM: ethylene propylene diene monomer), and the toothbrush head head can be combined with the replacement head. The bonding force was improved by molding 2 to 4 holes. Therefore, the strength of the replacement head in the horizontal or inclined direction with respect to the lengthwise direction of the replacement head acting during brushing is increased, thereby eliminating the risk of missing the replacement head, and excessive force acting on the toothbrush rod in the vertical direction when detaching or joining. By dispersing the force, the coupling and detachment can be performed with the minimum force, thereby preventing the deformation of the toothbrush rod due to the repeated attachment and detachment, thereby maintaining the proper bond strength at all times. In addition, during double injection molding of the handle rubber, the rubber reaches the coupling hole to form a packing role, thereby improving the bonding force, and at the same time, fully sealing the gap generated after bonding to prevent toothpaste or other foreign substances from adhering. It was.

The replacement head is made by injection molding using ordinary plastic (PP, ABS, PETG, etc.) like the toothbrush rod, and the replacement head has several to several tens of holes for the bristles to be implanted, and also the replacement head A thin undercut of 0.5-1.5 mm in height and 0.1-0.25 mm in thickness is formed on the entire side to be enclosed. Therefore, by enclosing the undercut all over the side of the head, the coupling strength in the horizontal direction or the inclined direction with respect to the longitudinal direction of the replacement head acting when brushing is increased to prevent the replacement head from falling out. As the height is reduced, it is easy to attach and detach when detaching or combining. In addition, the bottom of the replacement head has 2 to 4 coupling jaws of 1.0 to 2.0 mm in height that can be combined with toothbrush bars. It is a toothbrush that has the characteristics to maintain the proper strength by preventing the reduction of the force in the horizontal or inclined direction.

These inventions mentioned above have many complementary aspects. Therefore, not only the method of enclosing the side of the replacement head with an undercut, but also the method of making 2-4 coupling jaws and a coupling hole for joining the toothbrush rod and the replacement head, and a method of making a rubber packing around the coupling hole are all intended for use. It was invented to have a synergistic effect accordingly.

In the replaceable toothbrush consisting of a replacement toothbrush rod and a replacement head,

An undercut of 0.50 to 1.50 mm in height and 0.1 to 0.25 mm in thickness is formed on the entire side of the interchangeable head, and the brushing strength in the inclined direction with respect to the longitudinal direction of the head when brushing is 3 kgf or more, The detachable strength solved the problem of having a value of 2-4 kgf.

As described above, the toothbrush according to the present invention can be easily attached or detached, and when brushing, the replacement head does not fall out and maintains an optimum bond strength value that can be satisfied by the customer even after repeated detachment. In addition, the replacement toothbrush is far superior to the conventional replacement toothbrush in terms of usability.

Therefore, the replaceable toothbrush of the present invention is very useful industrially.

1 is a side view of a replaceable toothbrush in a detached state in accordance with the present invention.
Figure 2 is an enlarged plan view of the toothbrush bar according to the present invention.
3 is an enlarged front view of the replacement head according to the present invention;
4 is an enlarged side view of the replacement head according to the present invention;
<Explanation of symbols for the main parts of the drawings>
1: replaceable toothbrush, 2: replacement head,
3: splice jaw, 4: splice hole,
5: rubber packing, 6: undercut,
7: brush head.

The present invention provides a replaceable toothbrush composed of a replacement toothbrush bar and a replacement head,

An undercut of 0.50 to 1.50 mm in height and 0.1 to 0.25 mm in thickness is formed on the entire side of the interchangeable head, and the brushing strength in the inclined direction with respect to the longitudinal direction of the head when brushing is 3 kgf or more, The detachable strength relates to a replaceable toothbrush characterized in that it has a value of 2-4 kgf.

1 is a side view of a replaceable toothbrush in a detached state according to the invention, FIG. 2 is a planar enlarged view of the toothbrush bar according to the invention, FIG. 3 is a front enlarged view of the exchange head according to the invention, and FIG. 4 Is an enlarged side view of the replacement head according to the present invention.

The toothbrush of the present invention is composed of a replacement toothbrush rod (1) and the replacement head (2) having an appropriate bonding strength so as to easily remove and attach, but do not fall out when brushing, the replacement toothbrush rod (1) is a plastic commonly used PP (polypropylene), PETG (polyethylene terephthalate), AS (acrylonitrile styrene), CP (cellulose propionate), ABS (acrylonitrile butadiene styrene) may be used. Rubber materials for the rubber packing (5) around the coupling hole (4) made for good grip grip and mating with the exchange head (2) include general ethylene propylene diene monomer (EPDM) rubber, styrene ethylene butadiene styrene) is made by double injection molding using rubber and silicone rubber. In addition, in order to maintain proper bond strength by dispersing the force, the replacement toothbrush bar 1 is made to have 2 to 4 coupling holes 4 that can be combined with the replacement head 2. .

In the manufacture of the replacement head (2), the plastic (PP, PETG, ABS, etc.) is made by a general injection molding method, wherein the replacement head (2) to the bristles (7) can be planted several It has dozens of holes. The bristles (7) used in the bristles used general bristles such as nylon bristles and bristles (7) such as PBT (polybutylene terephthalate). In addition, a thin undercut (6) having a height (H) of 0.5 to 1.5 mm and a thickness of 0.1 to 0.25 mm was formed on the entire side of the replacement head (2), and formed to enclose it. It was molded to have 2 to 4 coupling jaws 3 of 2.0 mm. Therefore, while making the attachment and detachment in the vertical direction with respect to the longitudinal direction of the replacement head 2 easy, on the contrary, the brushing strength is strengthened in the horizontal or inclined direction with respect to the longitudinal direction of the replacement head 2. It is a replaceable toothbrush which has a feature that the replacement head 2 does not fall out, which results in more effective brushing.

To summarize the technical configuration and operation of the present invention, first, the undercut (6) is wrapped around the entire side of the replacement head (2), so that when brushing the horizontal or inclined to the longitudinal direction of the replacement head (2) The bond strength acting in the photographing direction is increased so that the replacement head 2 does not fall out when brushing, and as the height H and thickness of the undercut 6 are reduced, the demounting force acting in the vertical direction of the replacement head 2 is reduced. • The adhesion strength was reduced, making it easier to attach and detach when washing or replacing. In addition, by using two to four coupling holes 4 and coupling jaws 3 to disperse the excessive force applied when detaching and attaching, it is possible to prevent deformation of the replacement toothbrush 1 to maintain proper bonding strength. Molded to act as a rubber packing (5) around the hole (4) to prevent the attachment of toothpaste or other foreign matter.

The replacement toothbrush made by the present invention and the existing replacement toothbrush were subjected to a comparative evaluation experiment on consumer evaluation and bond strength for usability.

(Example)

As shown in Table 1 below, a replacement head 2 having two engaging jaws 3 and an undercut 6 throughout the head side, two engaging holes 4 and rubber packing 5 around them. After designing a replaceable toothbrush bar (1) to have a mold to produce a mold by experimenting with an injection toothbrush by a double injection technique, the comparative example was carried out using a conventional replacement toothbrush.

division Example Comparative example Splice hole and splice jaw 2 One Rubber packing There None Undercut Head side full
(0.10 to 0.25 mm thick) Partially in 4 head sides
(0.35 mm thick)

Experimental Example 1: Evaluation of Preference for Consumer Usability

Evaluation of the usability of the replaceable toothbrush used in Examples and Comparative Examples was evaluated by the following evaluation method.

For 30 panelists, the replacement toothbrushes manufactured according to the above examples and comparative examples were used for a certain period of time (30 days), and then the average value of the preference for usability was measured using a five-point comparison method through a comparison panel test. One result is shown in Table 2.

Usability preference Example Comparative example Convenience when attaching or detaching 3.9 3.5 Bonding force when brushing 4.1 3.0 Bonding force due to repeated desorption 3.9 2.7 Anti-fouling effect 3.8 3.1 Overall satisfaction 3.9 3.0

Evaluation criteria: 5: Very good, 4: Good, 3: Normal, 2: Poor, 1: Very bad

As shown in the results of Table 2, in the case of the embodiment was found to be much better in terms of preference for use compared to the comparative example, which is a replacement toothbrush of the present invention, convenience when detaching, bonding strength and brushing foreign matters when brushing It was found to be more effective in all usability.

Experimental Example 2: Evaluation of the bonding strength of the replacement head to the toothbrush rod (measurement of the bonding strength in the inclination direction)

After fixing the replaceable toothbrush stand 1 in the replaceable toothbrush prepared in the embodiment and the comparative example, and brushing the coupling portion of the replacement head (2) with a compression rod using a universal testing machine (Zwick 1120) In the inclined direction (approximately 45 degrees) was pressed until the replacement head (2) is pulled out, the maximum force (kgf) required at this time was measured and the results are shown in Table 3. As a result of quantifying the minimum value that the consumer does not fall out when brushing, it appeared to be more than 3kgf, the most satisfying optimum bond strength was more than 5kgf.

division Example Comparative Example Bond strength (kgf) 5.0 ± 0.3 2.2 ± 0.1

As shown in Table 3, the toothbrush of the comparative example is 2.2 kgf, which is less than the minimum appropriate value of 3 kgf, so that there is a risk of the replacement head falling out when brushing, while the toothbrush manufactured according to the embodiment of the present invention is 5 kgf. The value of indicates the best bond strength that the consumer can be most satisfied.

Experimental Example 3: Evaluation of Detachable Strength to the Toothbrush Bar of the Replacement Head (Removable Strength to the Vertical Direction)

After fixing the replaceable toothbrush 1 in the replaceable toothbrush manufactured in the Examples and Comparative Examples, remove the coupling portion of the exchange head 2 with a compression rod using a universal testing machine (Zwick 1120). Press until the replacement head 2 is pulled out in the vertical direction (90 degrees) acting upon attachment, and the maximum force (kgf) required at this time is measured and the results are shown in Table 4. As a result of quantifying the appropriate bond strength that can be easily attached and detached by consumers without affecting the bonding force when brushing, it was found to be 2-4 kgf, and it was difficult to attach and detach it more than 4 kgf.

division Example Comparative Example Bond strength (kgf) 3.0 ± 0.3 4.1 ± 0.1

2 ~ 4㎏f: Appropriate, 4㎏f or more: Difficult to attach or detach

As shown in Table 4, the toothbrush of the comparative example is 4.1 kgf, which is less than the appropriate range 2-4 kgf, while the toothbrush manufactured by the embodiment of the present invention is easily attached to the consumer at a value of 3 kgf. This possible strength was shown to be superior.

Experimental Example 4: Comparative evaluation of the bond strength trend according to the repeated desorption (bond strength against the inclination direction)

The replacement toothbrush prepared in Example and Comparative Example was measured using the bond strength measurement method performed in Experiment 2, and the changed bond strength values were measured when the number of detachments were repeated about 30 times, and the results are shown in Table 5 below. .

Desorption Count Bond strength (kgf) Example Comparative Example 1 time 5.2 ± 0.2 2.2 ± 0.1 Episode 2 5.1 ± 0.2 2.0 ± 0.1 3rd time 5.1 ± 0.1 1.7 ± 0.2 5 times 5.0 ± 0.2 1.3 ± 0.1 10 times 4.9 ± 0.4 0.9 ± 0.1 20 times 4.8 ± 0.3 0.6 ± 0.2 30 times 4.8 ± 0.2 0.3 ± 0.1

As shown in Table 5, the toothbrush of the comparative example has a large change in the bond strength value during repeated desorption experiments, especially when repeated three or more times of detachment shows a value of 2.0 kgf or less, while being easily removed when brushing, the replacement of the present invention. The type toothbrush shows the optimum bond strength that the consumer can satisfy the most with a value of 5kgf even after more than 30 repeated desorption experiments, and maintains the optimal bond strength by preventing deformation of the toothbrush by the dispersion of the force applied to the toothbrush. It can be seen that in terms of superiority.

Claims (2)

In the replaceable toothbrush consisting of a replacement toothbrush rod and a replacement head,
An undercut of 0.50 to 1.50 mm in height and 0.1 to 0.25 mm in thickness is formed on the entire side of the interchangeable head, and the brushing strength in the inclined direction with respect to the longitudinal direction of the head when brushing is 3 kgf or more, Detachable strength should have a value of 2-4 kgf,
2-4 coupling holes and coupling jaws are made in the toothbrush bar and the replacement head to prevent deformation of the toothbrush by force dispersing action. Replaceable toothbrush, characterized in that to keep.
The method of claim 1,
Replaceable toothbrush, characterized by the use of ordinary rubber material around the coupling hole of the toothbrush to allow the packing to be performed by the double injection technique.

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