JP2548396Y2 - toothbrush - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a toothbrush which can easily position a flocked portion even in a complicated place in an oral cavity and has an extremely excellent cleaning effect.

[Conventional technology]

Conventionally, technologies that enable cleaning of the oral cavity to all corners include, for example, Japanese Utility Model Laid-Open No. 57-30032 and Japanese Utility Model Laid-Open No. 61-639.
As disclosed in Japanese Patent No. 25, there is known a technique in which the tip of a flocking table is tapered to sharpen the tip of the flocking table.

Since the toothbrush obtained by this technique has a tapered base, it is easy to position the tip of the base (so-called Tsumasaki) at a complicated place in the oral cavity, such as the buccal surface or distal surface of the last molar. In addition, it is possible to clean a part that is difficult to reach with a normal toothbrush, and it is possible to clean the inside of the oral cavity to every corner.

[Problems to be solved by the invention]

However, a brushing method in which a tsumasaki portion is intensively used, for example, as shown in FIG. 7, the teeth are brushed vertically one by one in a state where the axial direction of the toothbrush is coincident with the direction of planting the teeth (hereinafter referred to as vertical polishing). When the toothbrush is used to scrape and brush the anterior lingual side using the toothbrush, the toothbrush has a problem that the cleaning effect on the site is inferior because the flocked area of the tsumaki area is small and the contact area with the teeth is small. In addition, if such a cleaning is performed, the tsumaki section is easy to bulge,
There was also a problem that the toothbrush could not be used early.

As a method of compensating for this drawback, as disclosed in Japanese Utility Model Publication No. 36-10649, the filament of the hair bundle constituting the tsumasaki part is thicker than the filament of the hair bundle constituting the part other than the tsumasaki part, As disclosed in Japanese Utility Model Application Laid-Open No. 57-30032, it is conceivable to give a so-called waist to the hair bundle of the tsumasaki part by shortening the hair length of the tsumasaki part as compared with other parts. However, in such a method, the feeling of the tsumasaki part becomes hard, which causes a reduction in the usability, and there is also a risk that the gums may be damaged when the brushing is carried out vigorously.

The present invention has been made in view of the present situation, and has an object to realize an improvement in the cleaning effect by the tsumasaki part without lowering the usability and causing gingival damage,
By realizing such a toothbrush, it is possible to effectively perform cleaning of a complicated part and brushing that uses a intensive part.

[Means for solving the problem]

The present invention devises a seemingly inconsistent demand in the prior art to reduce the feeling of use or enhance the cleaning effect of the tsumasaki part without damaging the gum, increasing the number of hair transplants of each hair bundle constituting the tsumasaki part. Achieved by that.

By the way, the most common means of increasing the number of flocking is to increase the number of flocking holes in the same area. This means is effective when there is room in the area of the planted portion and the number of planted holes can be increased without impairing the mechanical strength of the planted table. The mechanical strength of the flocking table is substantially determined by the distance between the flocking holes, and the distance between the flocking holes cannot be less than a certain value because of the need to maintain the mechanical strength. In the case of a tapered toothbrush, there is no room at the tip of the flocking table, and therefore, increasing the number of flocking by increasing the number of flocking holes has already reached its limit.

From such a device, the present inventors have newly focused on the size of the flocking holes and their arrangement, and by devising these, the number of flocking lines can be increased without deteriorating the mechanical strength at the tip of the tapered flocking table. An attempt was made to develop a toothbrush.

The toothbrush of the present invention completed based on such an idea has a large diameter in which the tip side of the flocking table has a rounded tapered portion and a diameter larger than a flocking hole formed behind the tapered portion. Three holes are formed at each vertex position of a triangle set in the taper with the tip of the taper as one vertex without intervening other flocking holes between the large diameter holes.
The center of these large-diameter holes is arranged at a point and any two of the flocking hole rows constituting the outermost row in the flocking table width direction behind the large-diameter hole.
It is designed to be located inside the extension of the line connecting the centers of the two flocking holes.

As the flocking table, one having a step on the flocking surface can be used, but using a flat one is advantageous in terms of manufacturing and cost, and for the same reason, the filament also has the same thickness throughout the flocking section. It is preferable to use one.

[Action]

The method of using the toothbrush having such a configuration is the same as that of a normal toothbrush, but since the toothbrush of the present toothbrush has a rounded and tapered shape, the flocked portion is positioned at a complicated portion in the oral cavity. It is easy. Moreover, three large-diameter holes are provided in the tapered portion, and another flocking hole is interposed between the large-diameter holes at each vertex position of the triangle set in the tapered portion with the tip position of the tapered portion as one vertex. And the center of these large-diameter holes is larger than the extension line of the line connecting the centers of any two flocking holes of the flocking hole row constituting the outermost row in the flocking table width direction behind the large-diameter hole. Because it is designed to be located on the inside, a certain margin space to maintain the mechanical strength required for the flocking table between each large diameter hole and between each large diameter hole and the outer periphery of the flocking table A hair bundle having more filaments can be planted without difficulty and in a well-balanced manner along the shape of the tapered portion while securing, and it is possible to achieve the maximum flocking density in the Tsumasaki portion of the flocking table, which is a narrow area. It is possible to increase the number of It can increase the brushing pressure at key unit. Therefore, an excellent cleaning effect can be realized not only when the brushing method using the entire flocked portion is employed, but also when the brushing method using the tsumasaki portion intensively is employed. In addition, the improvement of the cleaning effect by the Tsumasaki part is due to the increase in the number of flocked hairs and does not change the thickness or hair length of the filament constituting the hair bundle, so the feeling of touching the teeth and gums is the same as that of a conventional toothbrush. The same is true, and there is no risk of deterioration of the feeling of use or damage to the gums.

Moreover, since the tip of the flocking table is rounded, there is no danger of damaging the gingiva even when the tapered portion comes into contact with the gingiva or the like.

〔Example〕

Next, details of the present invention will be described based on the illustrated embodiment.

1 (a) and 1 (b) are a front view and a side view showing an embodiment of the toothbrush of the present invention, showing a state in which a hair bundle is removed to show the shape of a flocked hole.

In the figure, reference numeral 1 denotes a handle on which a band-shaped finger contact portion 2 having a textured surface is formed. The handle 1 is provided with a flocking table 4 extending through a long narrow neck portion 3. I have. The finger pad 2 is provided to prevent the thumb and the index finger from slipping and to enable powerful brushing, but the finger pad may be omitted as shown in FIG.

FIG. 3 shows details of the flocking table 4 which is a characteristic part of the present invention. The flocking table 4 is tapered in a state in which the tip side is rounded, and the flocking table 4 includes a straight portion 4a and a tapered portion 4b. Like the conventional toothbrush, the straight portion 4a is provided with three rows of normal-sized flocked holes (hereinafter referred to as "normal holes 5"), for example, flocked holes having a diameter of 2 mm, in the width direction of the flocked table 4. 4b has the ordinary hole 5
A large-diameter flocked hole (hereinafter, referred to as a large-diameter hole 6), for example, a large-diameter hole 6 set to a size of φ2.5 mm,
Three points are arranged at each vertex position of a triangle set in the taper, with the leading edge position of the taper as one vertex. Large diameter hole 6,
There is no other flocked hole between 6,6, and large diameter hole 6,6,6
In the area surrounding these large diameter holes 6, 6
Only 6,6,6 are present, and the space required between the large diameter holes 6,6,6 to maintain the mechanical strength required for the flocking table is secured. As shown in FIG. 8, the large diameter holes 6, 6, 6 have their centers P1, P2, P3 at any two positions of the flocking hole row constituting the outermost row in the flocking table width direction behind the large diameter hole. It is designed to be located inside the extension line L1, L2 of the line connecting the centers of the flocking holes, and secures ample space between the large diameter holes 6, 6, 6 and the outer periphery of the flocking table to flocking The mechanical strength of the table is guaranteed.

The size of the large-diameter hole 6 is the normal hole 5
Is preferably set in a range of 1.2 to 1.8 times.
This is because if it is less than 1.2 times, the cleaning effect cannot be improved much.On the other hand, if it is more than 1.8 times, the mechanical strength of the flocking table can be maintained because the distance between adjacent large diameter holes is too close. It is because it disappears.

It is advantageous to use a flat flocking table and to use the same filament as the filament constituting each bristle bundle throughout the flocking section for ease of production and reduction in cost. This does not exclude the use of a step having a step or the mixing of filaments having different thicknesses.

Test In order to confirm the effect of the toothbrush according to the present invention, the present inventor conducted a comparative test of the plaque removing effect when brushing was performed using a tsumasaki part.

In the test, the toothbrush of the "first embodiment" shown in FIG. 1 and the "figure of the second embodiment" except for the finger rest shown in FIG. 2 were removed.
The plaque removal effect of both toothbrushes was compared with that of a conventional toothbrush.
Note that the conventional toothbrush has substantially the same shape as the toothbrush of the "first embodiment", and a flocked hole formed in the tapered portion 4b is formed with a fourth toothbrush.
As shown in FIG.

The test was conducted by dividing eight dental hygienists with healthy teeth and gingiva between the ages of 20 and 25 years into two groups of four each. The upper right most posterior molar, the upper left middle incisor, and the upper left first small The average value of the plaque removal rate of each part of each tooth and the plaque removal rate for all teeth was calculated for the six teeth of the molar, the lower right first premolar, the lower right central incisor, and the lower left last molar. .

The test method is as follows: (a) Stop all oral cleaning for 24 hours before the test. (B) The amount of plaque adhesion is measured immediately before brushing. (C) Brushing is performed by a scrubbing method using a designated toothbrush. (D) The plaque remaining amount is measured immediately after brushing. (E) Perform normal oral cleaning until the next test day. Each of the procedures from (a) to (e) was alternately performed in two groups of four persons on a weekly basis.

As shown in FIG. 5, the brushing was performed by dividing the oral cavity into 22 blocks and using a scrubbing method (a modified method) of 10 strokes for each block. No dentifrice was used.

The method of measuring the amount of plaque adhesion is as follows: (1) buccal mesial corner, (ii) after staining plaque with plaque-indicating liquid, and as shown in FIG. Buccal center,
(Iii) buccal distal corner, (iv) lingual mesial corner,
Using a pocket probe, measurements were taken at six locations (v) lingual center and (vi) lingual distal corner. In FIG. 6, the part shown by the broken line indicates the back side of the teeth, that is, the side where the tongue touches. The probe was placed on the tooth surface so as to be parallel to the tooth axis, and the height of plaque from the cervical region was measured in 0.5 mm units. The plaque removal rate was calculated by the following formula.

Plaque removal rate (%) = [(AB) / A] x 100 A: Amount of plaque before brushing (mm) B: Amount of plaque remaining after brushing (mm) Invented toothbrush "No. 1
The toothbrushes of the "Example" and "Second Example" and the conventional toothbrush have particularly remarkable differences in both parts shown as a) and b) below, and also differ in the average value for all parts. It was confirmed that there was.

B) Dental plaque removal rate for the part where the toothbrush, such as the distal corner of the last molar, is difficult to reach.

First embodiment: 51.4% Second embodiment: 51.0% Conventional example: 40.5% b) The effect of removing plaque on the lingual side of the anterior teeth represented by the lingual side of the central incisors.

First embodiment: 75.0% Second embodiment: 73.1% Conventional example: 53.2% c) Plaque removal effect on all teeth First embodiment: 54.7% Second embodiment: 52.9% Conventional example: 51.9% The difference in the plaque removal effect between the "first embodiment" and the "second embodiment" is that the presence of the finger pad in the "first embodiment" ensures the grip of the handle. It is considered that powerful brushing became possible.

As described above, in the toothbrush of the present invention, since the tip of the flocking table is rounded and formed in a tapered shape, the flocking portion can be positioned even in a complicated place, and the mouth is cleaned to every corner. be able to. In addition, the flocking holes for planting the hair bundles located at the tip of each flocking row are large-diameter holes, and the large-diameter holes are each vertex of a triangle set in the taper with the tip of the taper as one vertex. At three positions without interposing other flocking holes between the large-diameter holes, and the center of these large-diameter holes constitutes the outermost row in the width direction of the flocking table behind the large-diameter hole. Is designed to be located inside the extension of the line connecting the centers of any two flocking holes, so that a large amount of bristle bundles can be easily and balanced while maintaining the mechanical strength required for the flocking table. It becomes possible to plant well. Since the number of flocking holes in the tapered Tsumasaki portion can be ensured even if the number is small, a sufficient number of flocking and a flocking density can be secured, so that the brush portion of the toothbrush is concentrated, for example, by a vertical brushing method for each tooth as shown in FIG. When a brushing method that is commonly used is adopted, an excellent cleaning effect that cannot be realized with a conventional toothbrush can be realized.
In addition, the brushing pressure acting on each filament during brushing is distributed and carried by a large number of filaments, so that the filaments constituting the Tsumasaki portion are prevented from spreading outward, and a toothbrush with excellent durability can be obtained. it can. In addition, since the improvement of the cleaning effect by the Tsumasaki part is performed by increasing the number of planted hairs, it is possible to use the same thickness and material as the filaments constituting the other parts as the filaments constituting the Tsumasaki part, Since each filament does not become hard, there is no damage to the gingiva during brushing.

[Effect of the invention]

The toothbrush of the present invention has a rounded taper on the tip side of the flocking table, and three large-diameter holes whose diameter is larger than the flocking hole formed behind the taper, and the leading end of the taper. At each vertex position of a triangle set in a tapered portion with the position as one vertex, three points are arranged without interposing other flocking holes between the large diameter holes, and the centers of these large diameter holes are
Since it was designed to be located inside the extension of the line connecting the centers of any two flocking holes of the flocking hole row constituting the outermost row in the flocking table width direction behind the large diameter hole, the following effects are listed. .

Since the tip of the flocking table is tapered, the flocking portion can be safely and easily positioned at a complicated place such as the buccal surface or the distal surface of the last molar. Moreover, the large-diameter hole formed in the tapered portion is arranged at three points without any intervening flocked holes at each vertex position of the triangle set in the tapered portion with the tip of the tapered portion as one vertex. In addition, the center of these large diameter holes is positioned inside an extension of a line connecting the centers of any two flocking holes of the flocking hole row constituting the outermost row in the flocking table width direction behind the large diameter hole. Due to the design, it is possible to maintain a certain margin for maintaining the mechanical strength of the flocking table between each large-diameter hole and between each large-diameter hole and the outer periphery of the flocking table. It is possible to implant a hair bundle having more filaments in a well-balanced and well-balanced manner, and it is possible to realize an aggregate of filaments having the maximum flocking density in the Tsumasaki part, so that the brushing pressure by the Tsumasaki part is remarkably increased. be able to. Although the tapered portion is narrow, the flocking bundle formed there can secure a sufficient number of flocking, so that an aggregate of dense bristle portions having a sufficient flocking density and a flocking area can be realized, and it is suitable for the brushing method using the Tsumasaki portion Toothbrush can be provided.

Since the toothbrush of the present invention realizes the improvement of the cleaning effect by the Tsumasaki part by increasing the number of hair transplants, the filament to be planted in the Tsumasaki part is an ordinary one, for example, a filament used in a part other than the Tsumasaki part. The same can be used. Therefore, since each filament does not become hard, the brushing can be performed with confidence without damaging the gingiva or reducing the feeling of use during brushing. In addition, the brushing pressure acting on each filament at the time of brushing is dispersed by a large number of filaments by increasing the number of hair transplants in the tsumasaki part, so that the brushing pressure acting on each filament can be reduced, and the filament in the process of use can be reduced. Can be prevented from spreading outward, and a toothbrush with excellent durability can be obtained.

[Brief description of the drawings]

FIG. 1 (a) is a front view of the first embodiment of the toothbrush according to the present invention, in which a flocked portion is removed, FIG. 1 (b) is a side view thereof, and FIG. 2 is a second embodiment according to the present invention. FIG. 3 (a) is an enlarged front view showing a flocking table in the toothbrushes of the first and second embodiments, and FIG. 3 (b) is the same. FIG. 4 is an enlarged side view for explanation showing a state in which a bristle bundle is erected on a flocking table, FIG. 4 is a front view showing a flocking table of a comparative toothbrush used for testing a plaque removing effect, FIG. 5 and FIG. FIG. 7 is an explanatory view showing the method of the test, FIG. 7 is an explanatory view showing a vertical polishing method for each tooth, and FIG. 8 shows a relationship between a center position of the large diameter hole and a center position of another flocking hole. FIG. 1: handle, 2: finger pad, 3: neck, 4: flocking table, 4a: straight part, 4b: tapered part, 5: normal hole, 6: large diameter hole.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 51-147665 (JP, U) JP-A 57-30032 (JP, U) JP-A 61-63925 (JP, U) JP 36-76 10649 (JP, Y2)

Claims (3)

(57) [Scope of request for utility model registration] 1. A toothbrush having a plurality of rows of flocking holes arranged in a flocking table and a hair bundle implanted in these flocking holes, wherein the tip side of the flocking table has a rounded taper and a taper. Three large-diameter holes whose diameters are larger than the flocking holes formed further rearward are placed at each vertex position of a triangle set in the taper with the tip of the taper as one vertex. Are arranged at three points without interposing other flocking holes, and the center of these large-diameter holes is located at the rear of the large-diameter hole. A toothbrush designed to be located inside the extension of the line connecting the centers. 2. The toothbrush according to claim 1, wherein said utility model is registered using a flat flocking table. 3. The toothbrush according to claim 1, wherein the thickness of the filament constituting the bristle bundle is uniform over the entire flocked portion.