TWI577312B - Stress control brush - Google Patents

Description

Constant force brush

The present invention relates to a brush, and more particularly to a brush that can define strength.

Good brushing habits can help maintain oral health and avoid tooth decay. In order to maintain the health of the mouth, try hard and brush every morning and evening. I hope that the teeth will be cleaned as much as possible. It is best to let the tooth decay never come to the door. However, anything is too far off. The research report points out that if the force of brushing teeth is too large, it may cause damage to the surface of the teeth and gums, but it will increase the risk of periodontal disease.

U.S. Patent No. 5,146,645 teaches a toothbrush that can indicate excessive brushing force. The toothbrush connects the brush head and the handle through two elastic beams. In use, the back side elastic beam is subjected to a compressive stress and the front side elastic beam is subjected to a stress. When the brushing force exceeds a predetermined force value, the back side beam is elastically deformed to concave the front side elastic beam and the brush head is largely bent. When the force exceeding the preset value is removed, the elastic beam can restore its original shape by its own elastic force and return the brush head to its original position. When the toothbrush with a large bending of the brush head is subjected to a force, a greater deformation is generated and the normal toothbrush function cannot be maintained, so as to avoid damage to the teeth and gums caused by excessive force.

The Continental Patent Application Publication No. 1400874 proposes a toothbrush force sensing system that can prompt the user when the user applies excessive pressure to the teeth. The toothbrush body is internally provided with a brush head member and an arched member provided with a collapsible and restored shape. The brush head member has an impact member that extends from its rear side and abuts against the surface of the arched member. When the user applies pressure to the teeth in the brush head The head member pivots relative to the toothbrush body and transmits force to the arch member through the impact member. When the pressure applied by the user exceeds a defined value, the arched member is deformed such that the head structure collapses into the body of the toothbrush to alert the user. When the pressure exceeding the limit value is removed, the arch member returns to its original state by its own elastic force and pushes the brush head member back to the original position.

Although the aforementioned toothbrush can prompt the user whether the force when brushing the teeth causes damage to the teeth and gums, there are different problems in use. The toothbrush proposed in U.S. Patent No. 5,146,645 has the problem that once the force of applying a predetermined value is applied, the brush head is greatly deformed and cannot be used continuously or even deformed by plastic deformation, and the force value and design of the toothbrush are deformed. There is a problem of the error between the strength values of the toothbrush when it is used. If the user wants to enhance the cleaning of a particular soiled part (such as a residue stuck in the tooth gap) during use, the toothbrush cannot satisfy the user's desire to use a large force for cleaning. The toothbrush proposed in the Continental Patent Application Publication No. 1400874 has a plurality of power transmission structures and a combined fixed structure. When used, the complicated structures and small gaps cause different values of force for deformation of each toothbrush. And it is easy to leave food residue or other contaminants and it is difficult to clean and not easy to keep dry. These residues and contaminants, combined with the humid environment, are prone to cause the growth of germs, which in turn leads to health problems that increase the chance of infection.

The present invention provides a constant force brush for reminding a user to apply a force exceeding a constant force value by using a change in the feedback response, which is used to solve the problem that the deformation amount of the toothbrush after the force is too large to continue to be used or even deformed by plastic deformation. The value of the force of the toothbrush is different each time it is deformed, and the problem that the toothbrush is not easy to clean.

A brush according to the present invention comprises a brush head, an elastic piece and a handle. brush The head includes a bristle holder and a first limiting portion. The handle includes a handle and a second limit. The elastic piece is connected to the brush head and the handle. The elastic piece is curved and has an unbent state and a bent collapse state. In the state of collapse and collapse, the first limiting portion and the second limiting portion abut against each other to limit the bending angle of the elastic piece.

According to the brush disclosed in the present invention, once the user brushes the teeth with the force which causes damage to the teeth and the gums, the force causes the elastic piece to exhibit a bending collapse state and a large bending deformation, and the associated brush causes the brush to be large. The bending deformation of the amplitude reminds and prevents the user from continuing to use the power to brush the teeth that will cause damage to the teeth and gums.

In addition, when the angle of bending of the elastic piece reaches a certain value, the first limiting portion and the second limiting portion are mutually in contact with each other, so that the angle at which the elastic piece is bent cannot be continuously increased, and the plastic deformation due to excessive bending of the elastic piece cannot be prevented. Reverts to the original state, and the function of the brush is destroyed.

And the first limiting portion and the second limiting portion are in contact with each other such that the angle at which the elastic piece is bent cannot continue to increase, and the user can continue to apply a slightly greater force to the brush head to clean a specific dirty portion of the oral cavity (for example, The residue stuck in the teeth), without the condition that the brush deformation is too large to be used.

In addition, the force is transmitted directly to the elastic piece connected to the brush head through the brush head to make the elastic piece bend and deform, and the deformation mechanism avoids the loss of force caused by excessive moving parts during the force transmission process, so that the brush is deformed each time. The strength values are uniform.

Furthermore, the first limiting portion is disposed outside the brush head and the second limiting portion is disposed outside the handle, so that there is no gap inside the brush that is too likely to remain contaminant and is easy to clean and keep dry.

The features, implementations, and utilities of the present invention are described in detail below with reference to the drawings.

100, 200, 300, 400, 500, 600, 700, 800‧‧‧ brushes

110, 210, 310, 410, 510, 610, 710, 810 ‧ ‧ head

111, 211, 311‧‧‧

112, 212, 312‧‧ ‧ bristle bundle

113, 213, 313‧‧ First Limits

1111, 2111, 3111‧‧‧ brush holder front

1112, 2112, 3112‧‧‧ The back of the bristle seat

1113, 2113, 3113‧‧‧

120, 220, 320‧‧‧ elastic film

121, 221, 321‧‧‧ first arc side

122, 222, 322‧‧‧ second arc side

123, 223, 323‧‧‧ linear side

1231‧‧ ‧ gap

124, 224, 324‧ ‧ convex

125, 225, 325 ‧ ‧ concave

130, 230, 330‧‧‧ handles

131, 231, 331‧‧ ‧ handle

132, 232, 332‧‧‧ second limit

240‧‧‧Flexible parts

3131‧‧‧Ply

3132‧‧‧Act

333‧‧‧ Third Limit Department

350‧‧‧Mask

F1‧‧‧First Strength

F2‧‧‧second force

Fig. 1 is a perspective view showing the three-dimensional structure of a brush according to a first embodiment of the present invention.

Fig. 2A is an exploded perspective view showing the three-dimensional structure of the brush according to the first embodiment of the present invention.

Fig. 2B is a schematic view showing the state of the elastic sheet of the first embodiment of the present invention.

3A and 3B are cross-sectional views of the brush of the first embodiment of the present invention.

Fig. 4 is a perspective view showing the three-dimensional structure of the brush according to the second embodiment of the present invention.

Fig. 5 is an exploded perspective view showing the three-dimensional structure of the brush according to the second embodiment of the present invention.

Fig. 6A is a cross-sectional view of the brush of the second embodiment of the present invention.

Figure 6B is a cross-sectional view of the elastic piece of the brush of Figure 6A extending along line 6B.

Figure 7 is a perspective view showing the three-dimensional structure of the brush according to the third embodiment of the present invention.

Fig. 8 is an exploded perspective view showing the three-dimensional structure of the brush according to the third embodiment of the present invention.

9A to 9C are cross-sectional views of a brush according to a third embodiment of the present invention.

10A to 10C are schematic views of the brush according to the fourth to sixth embodiments of the present invention.

11A and 11B are cross-sectional views of the brush according to the seventh embodiment and the eighth embodiment of the present invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to further illustrate the present invention, but are not intended to limit the scope of the invention in any way.

Please refer to FIG. 1 , FIG. 2A , FIG. 2B , FIG. 3A , and FIG. 3B , and FIG. 1 is a schematic perspective view of the brush according to the first embodiment of the present invention. Figure 2A is the first embodiment of the present invention An exploded view of the three-dimensional structure of the brush. Fig. 2B is a schematic view showing the state of the elastic sheet of the first embodiment of the present invention. 3A and 3B are cross-sectional views of the brush of the first embodiment of the present invention.

The brush 100 of the first embodiment of the present invention comprises a brush head 110, an elastic piece 120 and a handle 130.

The brush head 110 includes a bristle holder 111, a plurality of tufts 112 and a first limiting portion 113. The bristle holder 111 has an opposite bristle seat front surface 1111 and a bristle seat back surface 1112, and two bristle seat side surfaces 1113 located between the bristle holder front surface 1111 and the bristle holder back surface 1112. A plurality of tufts 112 are disposed on the front side 1111 of the bristle holder. The first limiting portion 113 is disposed on the bristle seat back surface 1112. The materials of the bristle holder 111, the bristle bundle 112 and the first limiting portion 113 are made of a polymer material, but are not limited thereto.

The elastic piece 120 is a rectangular elastic piece which is curved, but the shape of the elastic piece is not limited thereto. The elastic piece 120 has an opposite convex surface 124 and a concave surface 125, a first curved side end 121 and a second curved side end 122, and is located between the first curved side end 121 and the second curved side end 122. Relative to the two straight side ends 123. The point in the first arc side end 121 of the elastic piece 120 and the second arc side end 122 are parallel to the direction in which the brush head 110 is attached to the handle 130. The first arc side end 121 of the elastic piece 120 is coupled to the bristle holder 111, and the concave surface 125 of the elastic piece 120 faces the same direction as the bristle seat front surface 1111.

The handle 130 includes a handle 131 and a second stop 132. One end of the handle 131 is coupled to the second arc side end 122 of the elastic piece 120. The second limiting portion 132 is disposed on a side surface of the shank 131 facing the same direction as the convex surface 124. The material of the shank 131 and the second limiting portion 132 is a polymer material, but is not limited thereto.

The first limiting portion 113 and the second limiting portion 132 are respectively a column and a stopper, but are not limited thereto. The first limiting portion 113 extends from the bristle holder 111 toward the second limiting portion 132. When brushing When the 110 is subjected to a force less than the first critical value, the elastic piece 120 assumes an unbent state. When the brush head 110 receives a first force F1 that is greater than the first critical value, the elastic piece 120 assumes a bending collapse state and the first limiting portion 113 and the second limiting portion 132 interfere with each other. In other embodiments of the present invention, the first limiting portion and the second limiting portion are respectively a pillar and a blocking surface, a blocking block and a pillar or a blocking surface and a pillar.

As shown in FIG. 1, FIG. 3A, and FIG. 3B, when the brush 100 is not in use, the elastic piece 120 is unstressed and is in an unbent state. When the user brushes the teeth, the brush head 110 applies a force to the teeth through the plurality of bristle bundles 112, and the teeth also apply a first force F1 of opposite magnitude and opposite direction to the brush head 110 toward the bristle seat front surface 1111, thereby causing the brush head 110 to A bend is generated with respect to the grip 130. It is assumed that when the user brushes the teeth, the first force F1 acts on the center point of the position of the plurality of bristle bundles 112 on the bristle holder 111, so that the first force F1 is rotated by the center point of the elastic piece 120 as a fulcrum. The moment of the force is applied, and the elastic force of the elastic piece 120 is a fulcrum of the rotation of the handle 130 with the center point of the elastic piece 120 as a fulcrum. When the applied force is fixed, the magnitude of the applied torque is proportional to the length from the center point of the position of the plurality of bristle bundles 112 to the center point of the elastic piece 120, and the magnitude of the resistance moment is proportional to half the length of the elastic piece 120 (elastic piece arc) The distance from the side end to the center point of the elastic piece). When the first force F1 is less than or equal to a first critical value, the curved structure of the elastic piece 120 makes the elastic piece resemble a rigid body, and only produces a negligible amount of deformation, and the elastic piece 120 exhibits a slight bending state. At this time, the elastic force generated by the elastic force of the elastic piece 120 is equal to the biasing torque generated by the first force F1. However, once the first force F1 is greater than the first critical value, the curved structure of the elastic piece 120 collapses and produces a large bending elastic deformation to exhibit a bending collapse state. At this time, the elastic force generated by the elastic force of the elastic piece 120 is smaller than the biasing torque generated by the first force F1.

For example, when the user brushes the teeth with an appropriate force, the size of the first force F1 is less than the first critical value, and at this time, the elastic piece 120 is elastically deformed and the deformation amount of the elastic piece 120 is It is extremely small. Once the user brushes the teeth with the force that causes damage to the teeth and gums, the size of the first force F1 is greater than the first critical value, and the elastic piece 120 exhibits a bending collapse state and a large bending deformation, and the associated The brush 100 also produces a large amount of bending deformation. The large bending deformation of the brush 100 causes the brush 100 to respond to the user, thereby alerting and preventing the user from continuing to use the force that would cause damage to the teeth and gums. The response of the brush to the user is power feedback, sound feedback, deformation feedback or a combination thereof. For example, when the elastic piece is deformed, the sudden change of the feedback force makes the user feel the feeling, and when the elastic piece is deformed, the sound is emitted as a prompt, the elastic piece. The brush is suddenly bent during deformation and is not convenient to continue to use.

When the brush head 110 is subjected to the brushing force greater than the first critical value, when the elastic piece 120 is bent to cause the angle between the brush head 110 and the grip 130 to reach a degree, the first limit extending toward the second limiting portion 132 The end of the portion 113 is in contact with the second limiting portion 132 to prevent the brush head 110 from continuing to bend relative to the handle 130. Through the mutual interference between the first limiting portion 113 and the second limiting portion 132, the elastic piece 120 is prevented from being excessively plastically deformed and cannot be restored to its original shape. In addition, when the first limiting portion 113 and the second limiting portion 132 interfere with each other, the user can continue to apply a slightly greater force to the brush head 110 to clean a particular dirty portion of the oral cavity (eg, stuck in the interdental space). Residue), without the condition that the brush 100 is too large to be used.

In order to reduce the critical pressure tolerances of the elastic piece 120 at each bending, a notch 1231 can be formed at the opposite positions of the two linear side ends 123 of the elastic piece 120, so that the bending line of the elastic piece 120 can be bent and deformed. Fixed position. The shape of the notch on the linear side end 123 of the elastic piece 120 is triangular, curved or rectangular, but not limited thereto. The positions of the notches are preferably respectively located at the midpoint of the linear side ends of the elastic piece, but are not limited thereto.

In addition, the elastic piece 120 can transmit length, width, thickness, curved curvature, and material. The difference in material is used to adjust the critical elastic force of the elastic piece 120. The longer the length of the elastic piece 120, the wider the width, the greater the curvature, the thicker the thickness or the greater the modulus of elasticity of the material used, the more the critical elastic value changes. In the first embodiment, the elastic piece is a rectangular steel sheet but is not limited thereto. For example, the shape of the elastic piece is trapezoidal, and the material of the elastic piece is a group of a polymer material having a high modulus of elasticity and a metal material.

Further, the two linear side ends 123 of the elastic piece 120 are formed by grinding to form a circular arc surface to protect the user.

Please refer to FIG. 4, FIG. 5, FIG. 6A and FIG. 6B. FIG. 4 is a schematic view showing the three-dimensional structure of the brush according to the second embodiment of the present invention. Fig. 5 is an exploded perspective view showing the three-dimensional structure of the brush according to the second embodiment of the present invention. Fig. 6A is a cross-sectional view of the brush of the second embodiment of the present invention. Figure 6B is a cross-sectional view of the elastic piece of the brush of Figure 6A extending along line 6B.

The brush 200 of the second embodiment of the present invention comprises a brush head 210, an elastic piece 220, a handle 230 and a flexible appearance member 240.

The brush head 210 includes a bristle holder 211, a plurality of bristle bundles 212, and a first limiting portion 213. The bristle holder 211 has a pair of bristle holder front surface 2111 and a bristle holder back surface 2112, and a second bristle holder side surface 2113 opposite the bristle holder front surface 2111 and the bristle holder back surface 2112. A plurality of bristle bundles 212 are disposed on the bristle holder front surface 2111. The first limiting portion 213 is disposed on the bristle seat back surface 2112. The material of the bristle holder 211, the bristle bundle 212 and the first limiting portion 213 is a polymer material, but is not limited thereto.

The elastic piece 220 is a curved rectangular elastic piece, but the shape of the elastic piece is not limited thereto. The elastic piece 220 has an opposite convex surface 224 and a concave surface 225, a first curved side end 221 and a second curved side end 222, and is located between the first curved side end 221 and the second curved side end 222. Relative to the two straight side ends 223. a point in the first arc side end 221 of the elastic piece 220 and a second arc side end 222 The line of the midpoint is parallel to the direction in which the brush head 210 and the handle 230 are connected. The first arc side end 221 of the elastic piece 220 is coupled to the bristle holder 211, and the concave surface 225 of the elastic piece 220 faces the same direction as the bristle seat front surface 2111.

The handle 230 includes a handle 231 and a second stop 232. One end of the handle portion 231 is coupled to the second arc side end 222 of the elastic piece 220. The second limiting portion 232 is disposed on a side of the handle 230 that faces in the same direction as the elastic sheet convex surface 224. The material of the handle portion 231 and the second limiting portion 232 is a polymer material, but is not limited thereto.

The first limiting portion 213 and the second limiting portion 232 are respectively a column and a stopper, but are not limited thereto. The first limiting portion 213 extends from the bristle holder 211 toward the second limiting portion 232 . The material of the first limiting portion 213 and the second limiting portion 232 is a polymer material, but is not limited thereto. When the brush head 210 receives a first force F1 that is greater than a first threshold value, the elastic piece 220 assumes a bending collapse state and the first limiting portion 213 and the second limiting portion 232 interfere with each other. In other embodiments of the present invention, the first limiting portion and the second limiting portion are respectively a pillar and a blocking surface, a blocking block and a pillar or a blocking surface and a pillar.

The flexible appearance member 240 encloses the elastic sheet 220 such that the convex surface 224, the concave surface 225, and the side end 223 of the elastic sheet 220 are not in direct contact with the user. The material of the flexible appearance member 240 is a polymer material, but is not limited thereto.

The second embodiment of the present invention in FIGS. 4, 5, 6A, and 6B and the first embodiment of the present invention in FIGS. 1 , 2A, 2B, 3A, and 3B The examples are similar, so the details are not repeated here.

Please refer to FIG. 7 , FIG. 8 , and FIGS. 9A to 9C , and FIG. 7 is a schematic perspective view of the brush according to the third embodiment of the present invention. Figure 8 is a diagram of a brush holder according to a third embodiment of the present invention. Decomposition diagram of the body structure. 9A to 9C are cross-sectional views of a brush according to a third embodiment of the present invention.

The brush 300 of the third embodiment of the present invention comprises a brush head 310, an elastic piece 320, a handle 330 and two masks 350.

The brush head 310 includes a bristle holder 311, a plurality of tufts 312, and a first limiting portion 313. The bristle holder 311 has a pair of bristle seat front surface 3111 and a bristle holder back surface 3112, and a second bristle holder side surface 3113 opposite the bristle holder front surface 3111 and the bristle holder back surface 3112. The second bristle side surface 3113 extends the two masks 350 toward the elastic sheet 320. A plurality of tufts of bristles 312 are disposed on the front side 3111 of the bristle holder. The first limiting portion 313 is disposed on the bristle seat back surface 3112. The material of the bristle holder 311, the bristle bundle 312 and the first limiting portion 313 is a polymer material, but is not limited thereto.

The elastic piece 320 is a curved rectangular elastic piece, but the shape of the elastic piece is not limited thereto. The elastic piece has a convex surface 324 and a concave surface 325, a first arc side end 321 and a second arc side end 322, and a relative position between the first arc side end 321 and the second arc side end 322. Two straight side ends 323. A line connecting the midpoint of the first curved side end 321 of the elastic piece 320 and the second arc side end 322 is parallel to the connecting direction of the brush head 310 and the handle 330. The first arc side end 321 of the elastic piece 320 is coupled to the bristle holder 311, and the concave surface 325 of the elastic piece 320 faces the same direction as the bristle seat front surface 3111.

The handle 330 includes a handle portion 331 , a second limiting portion 332 , and a third limiting portion 333 . One end of the shank portion 331 is coupled to the second arc side end 322 of the elastic piece 320. The second limiting portion 332 is disposed on a side surface of the shank portion 331 facing the same direction as the elastic sheet convex surface 324. The third limiting portion 333 is disposed on the other side of the shank portion 331 that faces the same direction as the elastic sheet concave surface 325. The material of the shank portion 331, the second limiting portion 332 and the third limiting portion 333 is a polymer material, but is not limited thereto.

The first limiting portion 313 includes a column 3131 and a ring 3132, but is not limited thereto. The column 3131 extends from the brush head 310 toward the second limiting portion 332, and the ring body 3132 is disposed on the column 3131. An end of the second limiting portion 332 is adjacent to the elastic piece 320 and the elastic piece 320 is disposed in the ring body 3132 . The second limiting portion 332 and the third limiting portion 333 are respectively a stopper and a recess, but are not limited thereto. For example, the second limiting portion 332 and the third limiting portion 333 are both a stopper or a recess. The first limiting portion 313 extends from the bristle holder 311 to the second limiting portion 332, but is not limited thereto. For example, the first limiting portion 313 is disposed on the brush holder front surface 3111 and extends from the bristle holder 311 toward the third limiting portion 333. When the brush head 310 receives a first force F1 that is greater than a first threshold value, the elastic piece 320 assumes a bending collapse state to cause the first limiting portion 313 and the second limiting portion 332 to interfere with each other. When the brush head 310 receives a second force F2 that is greater than a second threshold value, the elastic piece 320 assumes a reverse bending collapse state to cause the first limiting portion 313 and the third limiting portion 333 to interfere with each other. The first force F1 is greater than the second force F2 and is opposite to each other. In other embodiments of the present invention, the first limiting portion, the second limiting portion, and the third limiting portion may be any pairing combination of a column and a ring body, a blocking surface, a blocking block, and a recess.

The two masks 350 are respectively disposed on the opposite sides of the bristle holder 311 and extend toward the handle 330. The elastic piece 320 is located between the two masks 350 and the two linear side ends 323 of the elastic piece are respectively covered by the two masks 350. The mask 350 covers the two linear side ends 323 of the elastic piece 320 such that the two linear side ends 323 of the elastic piece 320 are not in direct contact with the user. The material of the mask 350 is a polymer material, but is not limited thereto.

As shown in FIGS. 9A and 9B, when the user brushes the teeth, the relationship between the brush head 310, the elastic piece 320, the handle 330, the first limiting portion 313, and the second limiting portion 332 is related to FIG. 3A. The third embodiment of the present invention is similar to the third embodiment, and will not be described again. As shown in FIG. 9C, when the brush head 310 is subjected to a second force F2 in a direction opposite to the first force F1, the brush head 310 is bent relative to the grip 330. It is assumed that the second force F2 acts on the back side 3112 of the bristle seat opposite to the center point of the position of the plurality of bristle bundles 312 on the bristle holder 311, so that the second force F2 is at the center point of the elastic sheet 320. A urging moment is generated for the fulcrum relative to the rotation of the grip 330, and the elastic force of the elastic piece 320 is a fulcrum of the rotation of the grip 330 with the center point of the elastic piece 320 as a fulcrum. When the applied force is fixed, the magnitude of the applied torque is proportional to the length of the center of the bristle seat 3112 opposite to the center point of the position where the plurality of bristle bundles 312 are located to the center point of the elastic piece 320, and the magnitude of the resistance moment is proportional to the elastic piece 320. Half of the length (the distance from the side end of the elastic piece to the center point of the elastic piece). When the second force F2 is less than or equal to a second critical value, the curved structure of the elastic piece 320 makes the elastic piece 320 resemble a rigid body, and only produces a negligible amount of deformation, and at this time, the elastic piece 320 exhibits a reverse micro-bending state. At this time, the elastic force generated by the elastic force of the elastic piece 320 is equal to the biasing torque generated by the second force F2. However, once the second force F2 is greater than the second critical value, the curved structure of the elastic piece collapses and produces a large bending elastic deformation, at which time the elastic piece 320 exhibits a reverse bending collapse state. At this time, the elastic force generated by the elastic force of the elastic piece 320 is smaller than the biasing torque generated by the second force F2.

For example, when the user normally stores the brush 300, the size of the second force F2 received by the brush head 310 is less than the second critical value, and the curved structure of the elastic piece 320 makes the elastic piece resemble the rigid body and the elastic piece 320. The deformation or the amount of deformation is extremely small, and the elastic piece 320 is in an unbent state or a reversely slightly bent state. When the user uses the wrong way to store the brush 300 (for example, the brush and other washing utensils are inserted into the small washing bag), the size of the second force F2 received by the brush head 310 is greater than the second critical value, and the elasticity The sheet 320 collapses and produces an elastic deformation that is greatly bent, at which time the elastic sheet 320 exhibits a collapsed state. If the elastic piece 320 is excessively bent to be plastically deformed and cannot be restored to its original shape, the brush 300 will lose its function of assisting the user in controlling the brushing force.

When the brush head 310 is subjected to the second force F2 that is greater than the second threshold value, the elastic piece 320 is bent so that the angle between the brush head 310 and the handle 330 reaches β degrees, and the first limiting portion 313 of the elastic piece 320 is surrounded. The ring body 3132 and the third limiting portion 333 interfere with each other to prevent the brush head 310 from opposing the handle 330 Continue to bend. Through the mutual contact between the first limiting portion 313 and the third limiting portion 333, the elastic piece 320 is prevented from being excessively plastically deformed and cannot be restored to the original shape, thereby losing the function of the brush 300 to assist the user in controlling the brushing force.

In addition, the brush head 310 may further include a tongue cleaning portion (not shown) disposed on the back side 3112 of the bristle holder. When the user cleans the tongue, the brush head 310 is subjected to a second force F2. When the size of the second force F2 of the brush head 310 is greater than the second critical value, the elastic piece 320 collapses and produces elastic deformation of a small amount of bending. At this time, the first limiting portion 313 and the third limiting portion 333 are in contact with each other, thereby preventing the elastic piece 320 from continuing to bend, so that the user can continue to apply more force to clean the tongue coating.

In the third embodiment of the present invention, the brush 300 covers the two linear side ends 323 of the elastic piece 320 through the two masks 350 to prevent the elastic piece from directly contacting the user, but is not limited thereto. In another embodiment of the present invention, the brush includes a brush head, an elastic piece, a handle, a first limiting portion, a second limiting portion, a flexible appearance member, and A third limit. In the embodiment having the third limiting portion, the brush covers the concave surface, the convex surface and the two linear side ends of the elastic piece through the flexible appearance member to prevent the elastic piece from directly contacting the user. The brush passes through the first limiting portion and the second limiting portion or the third limiting portion to resist each other, thereby preventing the elastic piece from being excessively plastically deformed and unable to return to the original state.

Referring to FIGS. 10A to 10C and Table 1, FIGS. 10A to 10C are schematic views of the brush according to the fourth to sixth embodiments of the present invention. Table 1 is an experimental data sheet of the number of brush bundles, the length of the brush head, the length of the elastic piece, the critical elastic force of the elastic piece, and other parameters according to other embodiments of the present invention. The experimental data in Table 1 is the result of calculating the bending pressure of a fixed length elastic sheet (U-shaped steel sheet) on the basis of a total pressure of 150 g when two teeth are in contact with 24 bundles of bristles. Wherein, the length from the center point of the bristle bundle region to the center point of the elastic piece is from the center point of the bristle bundle region to the length of the end portion connecting the bristle holder and the elastic piece, and the side end of the elastic piece arc to the elastic piece The length of the heart point is obtained.

In the brush 400, the brush 500 and the brush 600 of the fourth embodiment to the sixth embodiment of the present invention, the brush head 410, the brush head 510 and the brush head 610 are respectively provided with 17 bundles, 28 bundles and 40 bundles of tufts of bristles. But not limited to this. For other embodiments of the invention having different numbers of tufts, please refer to Table 1. The force value applied to the teeth by the unit bristles on the brush is a certain value. The more the number of bristle bundles that are in contact with the teeth during brushing, the greater the reaction force that the brush head 410, the brush head 510, and the brush head 610 are subjected to. In general, two teeth will come into contact with the tuft at the same time. Since the permanent teeth, deciduous teeth and oral cavity of adults and children are different in size, in order to allow each user to select a suitable force brush according to the size of their mouth and teeth. In design, the number of bristle bundles on different sizes of the brush head is adjusted to adjust the size and material of the elastic sheet to obtain different critical elastic forces, so as to ensure that the teeth of different users do not bear excessive brushing force when using the fixed force brushing. Since the brush of the fourth embodiment to the sixth embodiment and other embodiments of the present invention are similar to the brushes of the first to third embodiments described above, only the differences are explained here, and the same is not the same. Let me repeat.

Next, please refer to FIG. 11A and FIG. 11B and Table 1. FIG. 11A and FIG. 11B are cross-sectional views of the brush according to the seventh embodiment and the eighth embodiment of the present invention. Table 1 is a table of experimental data of the number of brush bundles, the length of the brush head, the length of the elastic piece, the critical elastic force of the elastic piece, and other parameters according to other embodiments of the present invention.

In the brush 700 and the brush 800 of the seventh embodiment and the eighth embodiment of the present invention, the center point of the bristle bundle region of the brush head 710 and the brush head 810 to the center point of the elastic piece is L1 and L2 but not This is limited. For other embodiments of the present invention having different values of the center point of the bristle bundle region to the center point of the elastic sheet, refer to Table 1. Due to the use of the constant force brush, the first force F1 of the brush head is caused by a centering point of the elastic piece as a fulcrum to generate a biasing moment relative to the rotation of the handle. Plus the elastic force of the elastic piece The center point of the piece is the fulcrum generating a resistance moment relative to the rotation of the handle. In the case of fixed force application, the magnitude of the applied moment is proportional to the center point of the bristle bundle region to the length of the center point of the elastic piece, and the magnitude of the resistance moment is proportional to half the length of the elastic piece 320 (the elastic piece side end to the elastic piece) The distance from the center point). In design, the size and material of the elastic piece are adjusted according to the length of the brush head to obtain different critical elastic forces, so that the user's teeth will not be subjected to excessive brushing force when brushing the teeth with different brush head lengths. Since the brush of the seventh embodiment and the eighth embodiment and other embodiments of the present invention are similar to the brushes of the first to third embodiments, only the differences are explained here, and the same is not the same. Let me repeat.

According to the force brush of the present invention, when the user brushes the teeth with an appropriate force, the curved structure of the elastic piece makes the elastic piece resemble a rigid body, and the deformation amount of the elastic piece is extremely small. Once made When the user uses the power that causes damage to the teeth and gums, the elastic piece collapses and produces a large bending elastic deformation, which in turn causes the brush to undergo a large bending deformation. The large bending deformation of the brush causes the brush to respond to the user (for example, the user feels a sensation or hears a sound), thereby reminding and preventing the user from continuing to use the power to brush the teeth that may cause damage to the teeth and gums.

Furthermore, when the brush head of the fixed force brush according to the present invention is subjected to the brushing force greater than the first critical value, the elastic piece is bent to cause the end of the first limiting portion to interfere with the second limiting portion, thereby preventing the brush head from being opposite. The handle continues to bend. Through the mutual resistance between the first limiting portion and the second limiting portion, the elastic deformation of the elastic piece is prevented from being excessively deformed, and the original function of the brush is prevented from being restored.

In addition, in the use of the force brush according to the present invention, the force is directly transmitted through the brush head to the elastic piece connected to the brush head to bend and deform the elastic piece, thereby avoiding the loss of force through excessive moving parts during the force transmission process. , so that the force value of each deformation of the brush is uniform. Furthermore, the relative positions of the two linear side ends of the elastic piece may each form a notch to limit the bending line of the elastic piece to be bent and deformed at a fixed position, and also make the critical elastic force of the elastic piece uniform when deformed each time.

In addition, when the first limiting portion and the second limiting portion of the fixed force brush of the present invention are in contact with each other, the user can continue to apply a slightly greater force to the brush head to clean a specific dirty portion of the oral cavity (for example, The residue stuck in the teeth), without the condition that the brush deformation is too large to be used.

In addition, the first limiting portion of the present invention is disposed on the outside of the brush head and the second limiting portion is disposed on the outside of the handle, so that the inside of the brush has no gaps which are likely to remain contaminant and is easy to clean and keep dry. Avoid food residues and contaminants in the humid environment to breed germs, resulting in increased health problems for users with increased risk of infection.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and may be made by those skilled in the art without departing from the spirit and scope of the invention. The scope of patent protection of the present invention is defined by the scope of the patent application attached to the specification.

100‧‧‧ brushes

110‧‧‧ brush head

111‧‧‧Brushing seat

1111‧‧‧The front of the brush holder

1112‧‧‧The back of the brush holder

1113‧‧‧The side of the bristle seat

112‧‧‧brow bundle

113‧‧‧First Limitation Department

120‧‧‧Elastic film

130‧‧‧Handle

131‧‧‧ handle

132‧‧‧Second Limitation

Claims (10)

A force brush includes: a brush head including a bristle holder and a first limiting portion; a handle comprising a handle portion and a second limiting portion; and an elastic piece coupled to the brush head And the handle, the elastic piece is curved and has an unbent state and a bending collapse state, and in the state of the collapse state, the first limiting portion and the second limiting portion abut against each other The elastic piece bends the angle. The force brush according to claim 1, wherein the first limiting portion is a column, the second limiting portion is a stopper, and the column is directed by the brush head toward the blocking block. extend. The force brush according to claim 1, further comprising a flexible appearance member, the elastic sheet being covered in the flexible appearance member, wherein the flexible appearance member is made of a polymer material. The force brush according to claim 1, wherein the elastic piece further has a first arc side end and a second arc side end, and the first arc side end and the second arc line. The opposite two linear side ends between the side ends each have a notch. The force brush according to claim 1, wherein the brush head further comprises a plurality of bristle tufts, the bristle holder has a front side of the bristle holder and a back surface of the bristle holder, and the bristle bundles are disposed on the bristle The front surface of the seat is in a state in which the elastic sheet exhibits a collapsed state when the head is subjected to a first force that faces the front surface of the bristle holder and is greater than a first critical value. The force brush according to claim 5, further comprising two masks, the two masks being respectively disposed on opposite sides of the front side of the bristle holder and the back of the bristle holder and extending toward the handle The elastic piece is located between the two shielding pieces, and the elastic piece has a first arc side end and a second arc side end, and is located between the first arc side end and the second arc side end. Relative two straight side And the two masks respectively cover the two linear side ends of the elastic piece. The force brush according to claim 5, wherein the first limiting portion is disposed on a back surface of the bristle holder. The force brush according to claim 5, wherein the handle further comprises a third limiting portion, the second limiting portion and the third limiting portion are disposed on opposite sides of the handle When the brush head receives a second force that is greater than a second threshold value toward the back of the bristle holder, the elastic sheet exhibits a reverse bending collapse state, and the first limiting portion and the third limiting portion The portion is adapted to limit the bending angle of the elastic piece; wherein the first critical value is greater than the second critical value. The force brush according to claim 8, wherein the first limiting portion is disposed on the front side of the bristle holder. The force-fixing brush of claim 8, wherein the first limiting portion comprises a column and a ring body, the second limiting portion is a stopper, and the third limiting portion is a recess The bar extends from the brush head toward the block, the ring body is disposed at an end of the bar near the block, and the elastic piece is disposed in the ring body.