JP5824121B1 - toothbrush - Google Patents

Abstract

Provided is a toothbrush capable of improving safety without providing a handle for restricting the amount of penetration of the handle into the oral cavity. A toothbrush comprising a head part (2) in which a hair bundle (1) is implanted, a handle part (3), and a connecting part (4) for connecting the head part (2) and the handle part (3) to the toothbrush. When a predetermined compressive force is applied in the longitudinal direction of the handle portion 3, the connecting portion 4 bends due to plastic deformation, and the flocked surface of the head portion 3 is positioned inside the bend. [Selection] Figure 3

Description

  The present invention relates to a toothbrush used for brushing teeth.

  If the user falls while the head portion of the toothbrush is in the mouth, a serious accident may occur in which the head portion of the toothbrush breaks through the inner wall of the mouth.

  Therefore, by devising the shape of the handle part to regulate the amount of penetration of the handle part into the oral cavity, the head part of the toothbrush will remain even if the user falls while the head part of the toothbrush is in the oral cavity. There has been proposed a toothbrush that does not break through the inner wall of the oral cavity (see, for example, Patent Document 1 and Patent Document 2). Such toothbrushes are particularly useful for infants who are more likely to fall during brushing.

Japanese Patent No. 4802584 Japanese Patent No. 4943055

  However, the toothbrushes proposed in Patent Document 1 and Patent Document 2 are provided with a restricting portion on the handle portion for restricting the amount of penetration of the handle portion into the oral cavity. It was getting in the way.

  In view of the above situation, an object of the present invention is to provide a toothbrush that can improve safety without providing a restricting portion for restricting the amount of penetration of the handle portion into the oral cavity in the handle portion.

  The toothbrush which concerns on this invention is a toothbrush provided with the head part by which the bristle bundle is planted, a handle part, and the connection part which connects the said head part and the said handle part, Comprising: With respect to the said toothbrush When a predetermined compressive force is applied in the longitudinal direction of the handle portion, the connecting portion is bent by plastic deformation, and the flocked surface of the head portion is positioned inside the bent portion.

  Preferably, the predetermined compressive force is in a range of 0.25 [N] to 2.5 [N].

  Preferably, when the connecting portion is bent due to plastic deformation, an inferior angle formed by the longitudinal direction of the handle portion and the longitudinal direction of the head portion is in the range of 80 [°] to 100 [°]. .

  Preferably, when the predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle portion, the lower portion of the handle portion located on the opposite side of the connecting portion side of the handle portion is the connecting portion of the handle portion. The handle portion is bent by plastic deformation in a manner of bending with respect to the upper portion of the handle portion located on the portion side.

  Preferably, an inferior angle between the longitudinal direction of the handle portion and the longitudinal direction of the head portion is 165 [°] in a state where the connecting portion is not bent due to plastic deformation and no load is applied to the toothbrush. It is in the range of not less than 170 [°].

  In the toothbrush according to the present invention, when a predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle portion, the connecting portion bends due to plastic deformation, and the flocked surface of the head portion is positioned inside the bend. It is.

  In a conventional general toothbrush that does not have a restricting part for restricting the amount of penetration of the handle part into the oral cavity in the handle part, even when a predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle part Since the connecting portion is not bent due to plastic deformation, the head portion of the toothbrush may be in a state in which an accident may occur that breaks through the inner wall of the oral cavity. On the other hand, in the toothbrush according to the present invention, when a predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle part, the connecting part bends due to plastic deformation, and the flocked surface of the head part is inside the bend. Therefore, an accident in which the head portion of the toothbrush breaks through the inner wall of the oral cavity does not occur. That is, according to the toothbrush which concerns on this invention, safety | security can be improved, without providing the control part in the handle part for controlling the penetration | invasion amount into the oral cavity of a handle part.

  The toothbrush according to the present invention can be applied to a toothbrush for adults, but is suitable for a toothbrush for infants that are highly likely to fall during brushing.

It is a front view of the toothbrush which concerns on 1st Embodiment of this invention. It is a side view of the toothbrush which concerns on 1st Embodiment of this invention. It is a side view of the toothbrush which concerns on 1st Embodiment of this invention after predetermined | prescribed compressive force is applied to the longitudinal direction of a handle part with respect to a toothbrush. It is a principal part back perspective view of the toothbrush which concerns on 1st Embodiment of this invention. It is another side view of the toothbrush which concerns on 1st Embodiment of this invention after predetermined | prescribed compressive force is applied with respect to the toothbrush in the longitudinal direction of a handle part. It is another side view of the toothbrush which concerns on 1st Embodiment of this invention after predetermined | prescribed compressive force is applied with respect to the toothbrush in the longitudinal direction of a handle part. It is a front view of the toothbrush which concerns on 2nd Embodiment of this invention. It is a side view of the toothbrush which concerns on 2nd Embodiment of this invention. It is a front view of the toothbrush which concerns on 3rd Embodiment of this invention. It is a side view of the toothbrush which concerns on 3rd Embodiment of this invention. It is a front view of the toothbrush which concerns on 4th Embodiment of this invention. It is a side view of the toothbrush which concerns on 4th Embodiment of this invention. It is a perspective view of the toothbrush which concerns on the modification contained in this invention. It is a perspective view of the toothbrush which concerns on the modification contained in this invention after predetermined | prescribed compressive force is applied to the longitudinal direction of the handle | steering-wheel part with respect to the toothbrush. It is the 6th view of the toothbrush which concerns on the other modification contained in this invention, a longitudinal cross-sectional view, and a front perspective view. It is the 6th page figure and front perspective view of the toothbrush which concerns on the other modification contained in this invention after predetermined | prescribed compressive force was applied to the longitudinal direction of the handle | steering-wheel part with respect to the toothbrush. It is the 6th page figure and back perspective view of the toothbrush which concerns on the further another modification contained in this invention.

<First Embodiment>
The toothbrush which concerns on 1st Embodiment of this invention is demonstrated with reference to FIGS. As shown in FIGS. 1 and 2, the toothbrush according to the present embodiment includes a head portion 2 in which the bristle bundle 1 is implanted, a handle portion 3, and a connecting portion that connects the head portion 2 and the handle portion 3. 4 is provided. Although the material of the hair | bristle bundle 1 is not specifically limited, For example, nylon etc. can be used. Moreover, the material of the main body part of the head part 2, the handle part 3, and the main body part of the connecting part 4 is not particularly limited, but, for example, PET or nylon 66 can be used.

  In the state in which the connecting portion 4 is not bent due to plastic deformation and the toothbrush is not loaded, the longitudinal direction of the handle portion 3 and the longitudinal direction of the head portion 2 may coincide with each other. As described above, it is preferable to incline the longitudinal direction of the head portion 2 with respect to the longitudinal direction of the handle portion 3 because brushing becomes easy. In particular, when the minor angle θ formed by the longitudinal direction of the handle portion 3 and the longitudinal direction of the head portion 2 is in the range of 165 [°] or more and 170 [°] or less, brushing is further facilitated. When the handle portion 3 is not straight as in the present embodiment, the longitudinal direction of the handle portion 3 is, for example, the average of the direction of the track formed by the center position in the left-right direction of the front surface of the handle portion 3 (surface visible in FIG. 1). And it is sufficient.

  In the toothbrush according to the present embodiment, when a predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle portion 3, the connecting portion 4 bends due to plastic deformation as shown in FIG. The flocked surface is located inside the bend.

  When the user falls while the head part of the toothbrush is in the mouth, the tip of the head part 2 hits the inner wall of the mouth, and the tip of the head part 2 is pressed by the inner wall of the mouth, the handle against the toothbrush A compressive force is applied in the longitudinal direction of the portion 3. However, in this case, the lower end of the handle portion 3 is a free end.

  When the compressive force applied in the longitudinal direction of the handle portion 3 reaches the predetermined compressive force before the head portion 2 of the toothbrush breaks through the inner wall of the oral cavity, the connecting portion 4 bends due to plastic deformation as shown in FIG. Since the flocked surface of the head portion 2 is located inside the bend, the contact area between the inner wall of the oral cavity and the toothbrush is increased, and the head portion 2 of the toothbrush can be prevented from breaking through the inner wall of the oral cavity. In addition, the toothbrush which the connection part which connects a head part and a handle | steering-wheel part bends is disclosed by Unexamined-Japanese-Patent No. 2001-299451 or Japanese Utility Model Laid-Open No. 61-19331, for example. However, these toothbrushes are structures for realizing constant pressure brushing, and are completely different from the toothbrushes according to the present invention in that the bending is a bending due to elastic deformation and the flocked surface of the head portion is located outside the bending. Is.

  The specific value of the predetermined compressive force varies depending on the shape and hardness of the head portion 2 and the degree to which the strength of the inner wall of the oral cavity is estimated. Preferably, the predetermined compression force is set within a range of 0.25 [N] or more and 2.5 [N] or less. When the predetermined compressive force is less than 0.25 [N], there is a high possibility that the connecting portion 4 is bent due to plastic deformation even by light contact between the head portion 2 of the toothbrush and the inner wall of the oral cavity. When the compression force is greater than 2.5 [N] or less, there is a high possibility that the head portion 2 of the toothbrush will break through the inner wall of the oral cavity when the user falls while the head portion of the toothbrush is placed in the oral cavity. Because.

  Further, when the bending due to the plastic deformation described above occurs, the minor angle θ formed by the longitudinal direction of the handle portion 4 and the longitudinal direction of the head portion 2 may be in the range of 80 [°] or more and 100 [°] or less. preferable. If the minor angle θ formed by the longitudinal direction of the handle portion 4 and the longitudinal direction of the head portion 2 is larger than 100 [°], the degree of reduction of the contact area between the inner wall of the oral cavity and the toothbrush is small, so The possibility that the head part 2 of the toothbrush breaks through the inner wall of the oral cavity when the head part falls while the part is in the oral cavity increases, and the subordinate angle θ formed by the longitudinal direction of the handle part 4 and the longitudinal direction of the head part 2 If the angle is less than 80 [°], the movement amount of the head portion 2 is increased, and the risk of damaging the gums or the like with the large movement of the head portion 2 is increased.

  Here, the principal part back surface perspective view of the toothbrush which concerns on this embodiment is shown in FIG. The integrally molded body 5 shown in FIG. 4 is an integrally molded body including the head portion 2, the main body portion 3 </ b> A of the handle portion 3, and the main body portion 4 </ b> A of the connecting portion 4. A concave portion 6 is provided on the back surface of the main body portion 4A of the connecting portion 4, and concave portions 7 and 8 are provided on the back surface of the main body portion 3A of the handle portion 3. Furthermore, a connecting recess 9 that connects the lower side of the recess 6 and the upper side of the recess 7 and a connecting recess 10 that connects the lower side of the recess 7 and the upper side of the recess 8 are provided on the back surface of the integrally molded body 5. .

  The attachment portion 4B (see FIG. 3) of the connecting portion 4 is fitted into the recess 6 and the contact surface is welded, and the attachment portion 3B (see FIG. 3) of the handle portion 3 is fitted into the recess 7 and the contact surface is welded. The attachment portion 3C (see FIG. 3) of the handle portion 3 is fitted into the recess 8 and the contact surface is welded. Further, a connecting body for connecting the attachment portion 4B of the connection portion 4 and the attachment portion 3B of the handle portion 3 is fitted into the connection recess 9 and the contact surface is welded, and the attachment portion of the handle portion 3 is connected to the connection recess 10. A connecting body for connecting 3B and 3C is fitted and the contact surface is welded. A connecting body for connecting the attachment portion 4B of the connection portion 4, the attachment portion 3B of the handle portion 3, the attachment portion 3C of the handle portion 3, and the attachment portion 4B of the connection portion 4 and the attachment portion 3B of the handle portion 3. As an example of the material of the integrally molded appendix including the coupling body for coupling the appendages 3B and 3C of the handle portion 3, for example, silicon rubber can be used.

  Since the hardness of the integrally molded appendage is higher than the hardness of the integrally molded body 5, the flocked surface of the head portion 2 is positioned inside the bend rather than the bend where the flocked surface of the head portion 2 is positioned outside the bend. Bend easily. Moreover, since the hardness of the integrally molded body 5 can be set lower than the hardness of the handle portion of a conventional general toothbrush, an excessive brushing pressure can be suppressed as a secondary effect.

  When the user falls while the head portion of the toothbrush is in the mouth, the lower end of the handle portion 3 hits the ground, and the predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle portion 3. In this case, as shown in FIG. 5, the handle portion 3 is bent by plastic deformation in a manner in which the lower portion of the handle portion is bent in the same bending direction as the bending direction of the connecting portion 4 with respect to the upper portion of the handle portion. Thereby, since the length of the substantially straight part of the handle | steering-wheel part 3 becomes short, it will restrict | limit the amount of penetration | invasion into the oral cavity of the handle | steering-wheel part 3, and can improve safety | security further.

  Even if the attachment portions 3B and 3C of the handle portion 3 are not provided, the connecting portion 4 shown in FIG. 3 can be bent. Further, unlike the present embodiment, the attachment portion 4B of the connecting portion 4, the attachment portion 3B of the handle portion 3, and the attachment portion 3C of the handle portion 3 can be made as separate parts.

  Further, in the integrally molded attachment, the hardness of the attachment portion 3C of the handle portion 3 can be different from the hardness of the attachment portion 4B of the connection portion 4 and the attachment portion 3B of the handle portion 3.

  Therefore, unlike the above description, the hardness of the attached portion 3C of the handle portion 3 is made lower than the hardness of the attached portion 4B of the connecting portion 4 and the attached portion 3B of the handle portion 3 and the hardness of the integrally molded body 5. Thereby, when the user falls while the head part of the toothbrush is placed in the oral cavity, the lower end of the handle part 3 hits the ground, and the predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle part 3. In this case, the handle portion 3 is bent in a bending direction opposite to the bending direction of the connecting portion 4 with respect to the handle portion upper portion as shown in FIG. be able to.

Second Embodiment
The toothbrush according to the second embodiment of the present invention shown in FIGS. 7 and 8 has a configuration in which the attachment portion 4C of the connecting portion 4 and the attachment portion 3D of the handle portion 3 are added to the toothbrush according to the first embodiment of the present invention. is there. Examples of the material of the attachment portion 4C of the connecting portion 4 and the attachment portion 3D of the handle portion 3 include silicon rubber. The hardness of the attachment portion 4 </ b> C of the connecting portion 4 is made lower than the hardness of the main body of the connecting portion 4. On the other hand, in the case where the handle portion 3 is designed to be bent as in FIG. 5, the hardness of the attached portion 3D of the handle portion 3 is lower than the hardness of the main body of the handle portion 3, and the handle as in FIG. In the case of designing the bending of the portion 3, the hardness of the attached portion 3 </ b> D of the handle portion 3 is higher than the hardness of the main body of the handle portion 3.

<Third Embodiment>
The toothbrush according to the third embodiment of the present invention shown in FIGS. 9 and 10 is each shape of the attachment portion 4C of the connecting portion 4 and the attachment portion 3D of the handle portion 3 with respect to the toothbrush according to the second embodiment of the present invention. The configuration is changed.

<Fourth embodiment>
The toothbrush according to the fourth embodiment of the present invention shown in FIG. 11 and FIG. 12 changes each shape of the attachment portion 4C of the connecting portion 4 and the connecting portion 4 with respect to the toothbrush according to the second embodiment of the present invention, In this configuration, the attached portion 3D of the handle portion 3 is removed. In the present embodiment, the shape of the connecting portion 4 is a reverse letter when viewed from the side, and the flocked surface of the head portion 2 is bent rather than bent so that the flocked surface of the head portion 2 is located outside the bend. It is easy to bend such that it is located inside.

<Others>
Even in the structure other than the toothbrush according to the first to fourth embodiments of the present invention described above, when a predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle portion, the connecting portion that connects the head portion and the handle portion. Therefore, it is possible to realize a toothbrush in which bending due to plastic deformation occurs and the flocked surface of the head portion is located inside the bending.

  For example, in the toothbrush shown in FIG. 13, the connecting portion 4 includes one columnar member on the side of the flocked surface 2 </ b> A of the head portion 2, and includes two columnar members on the side opposite to the flocked surface 2 </ b> A of the head portion 2. Therefore, the strength of the head portion 2 on the side of the flocked surface 2A is weaker than that on the side opposite to the flocked surface 2A of the head portion 2. As a result, when a predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle portion 3, the connecting portion 4 connecting the head portion 2 and the handle portion 3 bends due to plastic deformation, as shown in FIG. Thus, the toothbrush in which the flocked surface 2A of the head portion 2 is located inside the bend can be realized. In FIG. 13 and FIG. 14, illustration of hair bundles implanted in the head portion 2 is omitted.

  Next, a toothbrush according to another modification included in the present invention will be described. FIG. 15 is a hexahedral view, a longitudinal sectional view, and a front perspective view of a toothbrush according to another modification included in the present invention. FIG. 16 is a six-side view and a front perspective view of a toothbrush according to another modified example included in the present invention after a predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle portion. In addition, in FIG. 15, illustration of the hair | bristle bundle planted by the head part is abbreviate | omitted. The toothbrush according to another modified example included in the present invention is similar to the above-described toothbrush according to the first to fourth embodiments of the present invention, by utilizing the difference in hardness of different materials, When a predetermined compressive force is applied in the longitudinal direction, the connecting portion that connects the head portion and the handle portion bends due to plastic deformation, and the flocked surface of the head portion is located inside the bend. Yes.

  Finally, a toothbrush according to still another modification included in the present invention will be described. FIG. 17 is a hexahedral view and a rear perspective view of a toothbrush according to still another modification included in the present invention. In FIG. 17, illustration of the hair bundles implanted in the head portion is omitted. A toothbrush according to still another modification included in the present invention applies a predetermined compressive force to the toothbrush in the longitudinal direction of the handle portion by utilizing the asymmetry between the front side outer shape and the back side outer shape of the connecting portion. In this case, the connecting portion connecting the head portion and the handle portion bends due to plastic deformation, and the flocked surface of the head portion is located inside the bend.

DESCRIPTION OF SYMBOLS 1 Hair bundle 2 Head part 3 Handle part 3A Main part of handle part 3B, 3C, 3D Additional part of handle part 4 Connection part 4A Main part of connection part 4B, 4C Additional part of connection part 5 Integrated molded body 6, 7, 8 Recesses 9, 10 Connection recesses

Claims (6)

A head part in which a hair bundle is implanted;
A handle,
A toothbrush comprising: a connecting portion for connecting the head portion and the handle portion;
The connecting portion is composed of a plurality of materials having different hardnesses,
When a predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle portion, the connecting portion is bent due to plastic deformation, and the flocked surface of the head portion is located inside the bent portion. Toothbrush. A head part in which a hair bundle is implanted;
A handle,
A toothbrush comprising: a connecting portion for connecting the head portion and the handle portion;
The front side outer shape and the back side outer shape of the connecting part are asymmetric,
When a predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle part, the connecting part bends due to plastic deformation, and the flocked surface of the head part and the front face of the connecting part are inside the bend. The toothbrush is characterized in that the back surface of the connecting portion is located outside the bend. The toothbrush according to claim 1 or 2, wherein the predetermined compressive force is in a range of 0.25 [N] to 2.5 [N]. 2. The minor angle between the longitudinal direction of the handle portion and the longitudinal direction of the head portion when the connecting portion is bent due to plastic deformation is within a range of 80 ° to 100 °. The toothbrush as described in any one of -3. When the predetermined compressive force is applied to the toothbrush in the longitudinal direction of the handle portion, the lower portion of the handle portion located on the opposite side of the handle portion from the connecting portion side is located on the connecting portion side of the handle portion. The toothbrush as described in any one of Claims 1-4 in which the bending by plastic deformation arises in the said handle part in the aspect bent with respect to the handle part upper part located. In a state where the connecting portion is not bent due to plastic deformation and a load is not applied to the toothbrush, an inferior angle between the longitudinal direction of the handle portion and the longitudinal direction of the head portion is 165 [°] or more and 170 [ °] The toothbrush according to any one of claims 1 to 5 in the following range.

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