JP2019115470A - Replacement brush for electric tooth-brush - Google Patents

Abstract

To provide a replacement brush for an electric tooth-brush in which vibration is hard to be transmitted to an oral cavity part other than the cleaning purpose while maintaining a high cleaning power, a feeling of use is superior, and safety is also superior.SOLUTION: A replacement brush for an electric tooth-brush is structured as follows: a "replacement brush outer shell (8)" for forming the primary exterior appearance of a replacement brush body is connected with a "bristle transplanting base (3)" formed by transplanting a bundle of filament in a swingable state of the bristle transplanting base (3) to the replacement brush outer shell (8) without being affixed; and the bristle transplanting base (3) is vibrated, swung, rotated or positively reversed by using the driving force of an electric tooth-brush body (1). Thereby, the replacement brush for the electric tooth-brush is provided in which the vibration is not transmitted to an oral cavity tissue as much as possible while maintaining high cleaning power.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a replacement brush for an electric toothbrush.

  The electric toothbrush achieves the cleaning effect when used in the oral cavity by moving the head part including the brush of the toothbrush using the kinetic energy of the motor, and the main part including the power source and the motor and the cleaning effect And a connecting structure which is an elongated structure connecting the main body and the head. The target of cleaning in the oral cavity is mainly the tooth surface. In particular, it is known that the head portion of the toothbrush is difficult to move freely because the gap between the tooth surface and the gums and the inner cheek portion is narrow at a portion near the back teeth, and a sufficient cleaning effect can not be obtained. In particular, in the case of the electric toothbrush, the head portion is moved by utilizing the driving force of the main body motor, so that the head portion becomes larger than a normal toothbrush, and the problem of cleaning failure easily occurs at a portion near the back teeth. was there. For this reason, in order to simplify the structure of the head portion of the electric toothbrush, there has been an attempt to miniaturize the head portion by reciprocating the whole of the brush portion and the connecting structure.

  However, even if the size is reduced, since the toothbrush head portion is larger than the cavity in the oral cavity, when the entire head portion and the connection structure portion are reciprocated, the reciprocating vibration occurs in the intraoral region contacting with the electric toothbrush other than the cleaning region. It can not be avoided that it is transmitted. For this reason, it is necessary to handle the electric toothbrush other than the person such as a person who needs to be affected by the external force such as discomfort due to vibration given to the intraoral region, surgical measures, trauma, inflammation, etc. In some people, there is a risk that the vibration due to the reciprocation may strain or damage oral tissue.

  In order to solve this problem, several electric toothbrushes of a new mechanism which drives only a brush part conventionally are proposed. For example, combining a magnet and an excitation coil, and attaching a brush part to a head part via a diaphragm or a hinge structure (Patent Document 1) or combining a permanent magnet subjected to multipolar magnetization and a diaphragm having an excitation coil. The technique (patent document 2) which comprises a brush part is mentioned. However, since the structure of these head portions can not be simplified, not only can they not be sufficiently improved with regard to the miniaturization of the head portion, which is the conventional problem, but also there are many cases where they have complicated structures. There was a problem that it became too much.

JP, 2009-045202, A JP, 2009-106355, A

  The present invention is to provide a replacement brush for an electric toothbrush which is hard to transmit vibration to an oral cavity other than the cleaning purpose while maintaining high cleaning power, is excellent in feeling in use, and is excellent in safety. .

  The present inventors do not fix the "flushing brush shell (8)" that forms the main appearance of the brush replacement main body and the "flocking table (3)" on which the bundle of filaments is flocked. The flocking table (3) is connected to the body (8) in a swingable state, and the flocking table (3) is vibrated, shaken, rotated or positively using the driving force of the electric toothbrush main body (1) By reversing the structure, it has been found that it is possible to provide a replacement brush for an electric toothbrush that transmits as little vibration as possible to oral tissue while maintaining high cleaning power, and the present invention has been completed.

That is, the present invention provides a replacement brush for an electric toothbrush described in the following items 1 to 6.
Item 1. The flocking table (3) on which the filaments (2) are flocked is movably joined to the replacement brush shell (8) via the structurally deformable joining member (4),
The flocking table (3) and the drive transmission unit of the electric toothbrush main body are connected by a shaft (6) so that the flocking table can be rocked in accordance with the movement of the drive unit of the electric toothbrush main body.
Replacement brush for electric toothbrush that can be detached from the electric toothbrush main body (1).
Item 2. The replacement brush for an electric toothbrush according to Item 1, wherein the deformable joining member (4) is made of an elastomer, rubber or silicone.
Item 3. Item 3. The replacement brush for an electric toothbrush according to any one of Items 1 or 2, wherein the cross-sectional shape of the bonding member (4) to be deformed is U-like or V-like.
Item 4. The hair-implanting table (3) and the electric toothbrush main body drive transmission unit are connected by a shaft (6) such that the hair-implanting table (3) reciprocates or reversely moves. Replacement brush for an electric toothbrush according to Item.
Item 5. The electric toothbrush according to item 4, wherein the flocking table (3) and the electric toothbrush main body drive transmission part are connected by a shaft (6) such that the flocking table (3) reciprocates in the long axis direction of the replacement brush. Spare brush.
Item 6. In the bonding member (4) having the U-like or V-like shape, the phase difference when the bonding member (4) is maximally deformed in the movement direction of the flocking table (3) is a (mm), the flocking table Item 6. The brush for an electric toothbrush according to Item 5, wherein the following formula is established when the amplitude at the time of exercise in (3) is b (mm).
0.5 * b + 0.1 ≦ a ≦ 0.5 * b + 1.0

  Since it is possible to move the flocking table (3) to vibrate the oral cavity without vibrating the replacement brush shell (8) and feel the unpleasant vibration, when a third party such as an infant or a care recipient cleans the oral cavity It is possible to provide an electric toothbrush which can be used safely even for people with disabilities in the palate, cheeks and tongue.

Front view of an electric toothbrush. Side view of the electric toothbrush. Front view of the replacement brush. The front view of the change brush of an aspect different from FIG. Side view of the replacement brush. Sectional drawing of the change brush in the ZZ line of FIG. The toothbrush head part enlarged view in ZZ sectional drawing of FIG. The figure which showed the surface on the opposite side of the filament flocking surface of a flocking stand (3).

  Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

  The present invention provides a removable brush body (7) detachable from the electric toothbrush main body (1) in the electric toothbrush illustrated in FIGS. 1 and 2, and a representative shape thereof is illustrated in FIG.

  The electric toothbrush body (1) has at least a drive unit such as a motor, a power supply unit for supplying DC or AC electricity, an electric toothbrush body drive transmission unit, and a fixing unit for joining the replacement brush body (7) It is a structure provided with a structure that functions as a gripping unit, and a driving unit such as a motor or a power supply unit is usually incorporated in a cylindrical member made of synthetic resin, metal or the like. “Electric toothbrush main body drive transmission part (hereinafter sometimes referred to simply as“ drive transmission part ”)” refers to the brush main body (7) changing the rotational movement of the motor built in the electric toothbrush main body (1) It means a site provided for propagation. When the electric toothbrush is moved, the drive transmission part performs rotational movement or reciprocating movement around the long axis direction of the electric toothbrush main body (1).

  The replacement brush main body (7) of the present invention is a replacement brush shell (8) having a hollow structure at least in part, a flocking table (3) in which a filament (2) is flocked at least in part, Dynamically deformable joining member (4) for pivotally joining the stand (3) and the replacement brush shell (8), the flocking table (in conjunction with the phase change of the drive transmission part) 3) has a shaft (6) for performing movements such as reciprocating movement and rotational movement, and a fixing portion (5) for joining to the electric toothbrush main body (1) as a minimum structural element.

  As a material constituting the filament (2), in addition to synthetic resin, silicone and elastomer can also be used. Specifically, polyamide resin such as nylon 610, nylon 612 nylon or aramid, or polyester resin such as polybutylene terephthalate (PBT), polypropylene terephthalate (polytrimethylene terephthalate, PPT or PTT) or polyethylene terephthalate (PET), polypropylene Synthetic resins such as polyolefin resins such as (PP) and polyethylene (PE), polystyrene (SBC), polyolefin (TPO), polyvinyl chloride (TPVC), polyurethane (PU), polyester (TPEE), polyamide And thermoplastic elastomers (TPE) such as T.E. (TPAE). Filament having a composite structure in which the above-mentioned materials are processed into filaments using a mixture of a single material alone or a mixture of two or more materials uniformly, or members formed of a plurality of materials structurally joined And can be used as such.

  The filaments (2) are flocked to flocking holes (9) formed in advance in the flocking table (3) in a bundle of a plurality of filaments. One or more flocking holes can be installed in the flocking table (3). As a method of flocking to the flocking table (3), a method of fixing a bundle of filaments to the flocking table using a flat piece of metal called "flat wire", or melting one end of a filament bundle made of synthetic resin After being integrated by bonding or bonding, a method of embedding and fixing in a resin by melting, bonding or injection molding on a flocking table can be used. However, it is not limited to these methods, and any conventional method can be used.

  The material constituting the replacement brush shell (8) and the flocking table (3) is a synthetic resin, and the material constituting the shaft (6) is a metal or a synthetic resin. These may use the same material or may use different materials. Types of synthetic resin that can be used include, for example, polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polytrimethyl terephthalate (PTT), Polycarbonate (PC), polyoxymethylene (polyacetal resin (POM)), styrene acrylonitrile resin (AS), acrylonitrile butadiene styrene resin (ABS), cellulose propionate (CP), polyamide (PA), polymethyl methacrylate (PMMA), polyarylate (PAR), polylactic acid (PLA), etc., among which polypropylene (PP), polyethylene terephthalate (PET), polyoxymethylene Polyacetal resin (POM), acrylonitrile butadiene styrene resin (ABS) and polylactic acid (PLA) are preferable, and from the viewpoint of durability, polyethylene terephthalate (PET) and polyoxymethylene (polyacetal resin (POM)) are more preferable . The replacement brush shell (8) and the flocking table (3) are most preferably polyethylene terephthalate (PET), and the shaft (6) is most preferably polyoxymethylene (polyacetal resin (POM)).

  The shape of the “surface to flock the filaments (2) in the flocking table (3)” may be approximately circular, approximately oval, approximately rectangular, approximately square, approximately triangular, approximately pentagonal, approximately hexagonal, approximately star-shaped, etc. However, the present invention is not limited to this and can have any shape. In addition, the above-mentioned “flocked surface” is not only a flat surface, but also a surface curved in a convex direction, an inclined surface, and a complex surface in which a plurality of flat surfaces are connected by providing a step in the convex direction or a concave direction. The structure can also be adopted. The arrangement of the flocking holes (9) in the flocking table (3) of the filament (2) is also not particularly limited, and can be freely set regardless of the shape of the flocking table. Furthermore, a structure other than a filament, such as a conical or thin cylindrical shape, and a filament may be mixed and disposed in the flocking table.

  The joining member (4) allows the hair-implanting table (3) connected via the shaft (6) to move in conjunction with the phase change of the drive transmission unit without moving the replacement brush shell (8) It is a structure for In order to move only the flocking table (3), the flocking table (3) and the brush are replaced using the joining member (4) which can swing the flocking table (3) using only the driving force of the electric toothbrush Join the outer shell (8). The material constituting the joint member (4) which can be rockably joined is not particularly limited as long as it can be deformed by the motor driving force of the electric toothbrush, but, for example, an elastic body or easily A metal, a synthetic resin, an elastomer, silicone which can comprise a structural deformation body are mentioned. Among them, elastomers and silicones are preferable because they are excellent in terms of manufacturing cost and energy efficiency, etc. From the viewpoint of saving power consumption and utilizing energy for recovery from deformation of bonding members for kinetic energy of the flocking table, Shore A An elastomer or silicone having a hardness of 30 to 55, preferably 40 to 55, more preferably 45 to 55 is most preferable.

  The structure of the joining member (4) is not particularly limited as long as the structure of the joining member (4) can be deformed by the driving force of the electric toothbrush. However, it is necessary to realize the movement of the flocking table (3) to such an extent that at least a sufficient oral cleaning function can be obtained, and to have a stable structure that the joint member (4) is not broken even if used for a long time. In addition, since the brush part (11) inserted into the oral cavity at the time of use has a complicated structure as shown in FIG. 7, if water, toothpaste and the like intrude into the brush part, cleaning and drying are sufficiently performed. As a result, it is not only inconvenient in terms of hygiene, but also may lower the durability and exercise function of the replacement brush. Therefore, it is preferable that water and the like can not enter the inside of the brush portion (11) from the joining portion of the joining member (4). As the structure of the joining member (4), a thread-like structure expandable in the linear direction; a thin film / thin plate structure expandable in the planar direction or deformable in the vertical direction; coil-like structure; And W-shaped, zigzag-like or wave-like cross-sections or structures having a sponge-like internal structure capable of compressive deformation. Among them, a thin plate structure, a deformable U-shaped, V-shaped, W-shaped, zigzag-like or wave-like cross section capable of constituting a continuous joining surface or a sponge-like internal structure capable of compressive deformation Preferably, a structure having a U-shaped, V-shaped, W-shaped, zigzag-like or wave-like cross section that can be deformed is more preferable from the viewpoint of durability and energy efficiency, and a deformable U-shaped, V-shaped, Structures with a wave-like cross section are more preferred, and structures with a deformable U or V cross section are most preferred. In addition, the phase difference of movement of the flocking table (3) (moving distance in mm, for example, in the case of reciprocating movement means amplitude) is b, and as a preferable structure of the joining member (4) When the phase difference of the bonding member (4) in the movement direction of 3) is a (a unit is mm), the preferable range of a is 0.5 * b + 0.1 mm to 0.5 * b + 1.0 mm.

  In the present invention, the moving brush outer shell (8) is not moved and only the flocking table (3) is moved to maintain the high cleaning power in the oral cavity, and the electric toothbrush It is difficult to transmit vibration. In order to move the flocking table (3) joined to the replacement brush shell (8) by the joining member (4), the drive transmission part and the flocking table (3) have an elongated shaft (6) It connects by the movement conversion member which has a conversion function of movement. Thereby, movement of a drive transmission part can be transmitted to a hair-implanting base (3), without affecting a replacement brush outer shell (8).

  The connection means by the shaft (6) of the drive transmission part and the flocking table (3) is suitably selected according to what kind of movement the drive transmission part and the flocking table (3) perform. Specifically, the movement pattern of the drive transmission portion is either a reciprocating oscillating motion in the long axis direction of the electric toothbrush main body (1) or a rotational movement with the long axis direction of the electric toothbrush main body (1) as a rotational axis. The movement pattern of the flocking table (3) is the reciprocating motion of the replacement brush main body (7) in the long axis direction, the peristaltic motion with the long axis direction of the replacement brush main body (7) as the rotation axis, the flocking table (3 ) Is a rotational motion or a reverse motion with the perpendicular to the horizontal plane as the rotation axis, or a combined motion combining the above motions. It is not particularly limited as long as it is a connection means that enables these combinations. However, since the structure of the replacement brush can be further simplified and the size of the head portion of the replacement brush can be made smaller, it is preferable that the movement of the drive transmission portion be transmitted to the flocking table (3) without conversion. Most preferable is a combination in which the drive transmission part reciprocates in the long axis direction of the electric toothbrush main body and the flocking table (3) reciprocates in the long axis direction of the replacement brush in conjunction therewith.

  When the flocking table (3) performs movement in conjunction with the shaft (6), the flocking table (3) and the shaft (6) can be directly joined without the joining member, but the type of movement and vibration When the state of movement such as the number is different between the flocking table (3) and the shaft (6), they are joined via a conversion mechanism that converts that case. The conversion mechanism means, for example, a structure for converting the type of motion as shown in FIG. 7-9 of Japanese Patent Application No. 2016-101829. The flocking table (3) joins with the shaft (6) or the conversion mechanism to move at high speed, and in some cases changes the direction of movement with high frequency. On the other hand, when cleaning the oral cavity, since the filament (2) is used by pressing it against a cleaning site such as a tooth surface, the flocking table (3) receives stress from various directions when performing the above-mentioned exercise. However, since the flocking table (3) is a flat plate-like structure that mainly constitutes the brush portion of the toothbrush, smooth movement is likely to be impeded when it receives stress from other than the shaft or the like. In order to ensure smooth movement in this situation, a method of joining the flocking table (3) and the shaft or the like can be selected appropriately. For example, not only the method of fixing to the flocking table, but also the method of not fixing to the flocking table as shown in FIG. 7-9 of Japanese Patent Application No. 2016-101829 can be adopted. You may join at two or more places as shown in FIG. 8 of a specification. Moreover, regarding the joint structure of the joint portion, a combination of a pin structure and a structure that encloses a hole structure or a pin tip structure (for example, a groove-like structure, a pot-like structure, etc.) or a combination of a concavo-convex structure may be mentioned. Furthermore, in the case of the combination of the concavo-convex structure, the cross-sectional shape is not limited to a substantially circular shape or a substantially elliptical shape, and a polygonal shape such as a triangle or a quadrangle, or a teardrop shape can be appropriately selected. In addition, it is also possible to select that both the flocking table (3) and the shaft be fixed. In the case of fixing, an adhesive or adhesion by melting can be used.

  1 and 2 show an overall view of one embodiment of the electric toothbrush of the present invention. The electric toothbrush comprises an electric toothbrush main body (1) and a replacement brush main body (7), and as shown in the figure, both are joined with each other in the longitudinal direction. The brush part (11) of the replacement brush main body (7) is connected to the synthetic resin flocked table (3) on which the filaments (2) are flocked and the replacement brush outer shell (8) through the joining member (4) The bonding member (4) having the following structure is in close contact with the flocking table (3) and the replacement brush shell (8) to such an extent that water can not enter the inside of the brush portion (11) at all boundaries. There is. When viewed from the side of the replacement brush main body (7), in the embodiment shown in FIG. 2, the flocking table (3) is hidden behind the joint member (4) and can not be seen, but the arrangement or structure of the joint member (4) changes It can also be arranged so that it can be seen visually. The shape of the flocking table (3) is a semicircular substantially rectangular shape only in the side of the electric toothbrush tip direction, but the shape can be freely designed.

  The state which looked at the change brush main body (7) from the electric toothbrush shown in FIG. 1 and was seen from the front is shown in FIG. The movement of the flocking table (3) in the embodiment shown in FIG. 3 can be performed by reciprocating movement in the long axis direction of the replacement brush main body (7) or swinging movement with the ZZ axis as a rotation axis It is possible to select any of the cases of rotating the table slightly and reversely).

  FIG. 4 shows another embodiment of the replacement brush body (7) shown in FIG. The difference from FIG. 3 is that an opening (12) is provided in a part of the replacement brush shell (8). In the replacement brush main body (7) shown in FIG. 4, it is possible to visually recognize an elongated shaft (6) connecting the flocking table (3) and the drive transmission part. Although the size of the opening and the arrangement in the changing brush main body can be freely designed, when providing the opening (12), a device for preventing water or the like from entering the inside of the brush portion (11) may be separately provided preferable.

  The change brush main body (7) is removed from the electric toothbrush shown in FIG. 1, and the state seen from the side is shown in FIG. The fixed part shown in 5 of FIG. 5 is a connecting part with the electric toothbrush main body (1), and in this case, after inserting into the electric toothbrush main body, the long axis direction of the replacement brush main body (7) is changed as a rotation axis A fixing method is used which can be fixed by rotating the brush body (7). The replacement brush shell (8) is composed of two parts as shown in the figure.

  A cross-sectional view of the replacement brush main body (7) along the line Z-Z in FIG. 3 is shown in FIG. In the embodiment shown in FIG. 6, the flocking table (3) reciprocates in the longitudinal direction of the replacement brush main body (7). The flocking table (3) is joined by an annular joining member (4) having a U-shaped cross section. The shaft (6) is connected to the opposite side of the flocked surface of the flocking table (3), and the electric toothbrush main body drive transmission portion is inserted into the recess (10) provided at the end of the shaft (6) Transfer the exercise to the flocking table (3). In the embodiment shown in FIG. 3, the drive transmission portion is constituted by a rod-like member which reciprocates in the longitudinal direction of the electric toothbrush main body (1).

  FIG. 7 is an enlarged view of the head portion (11) of FIG. The annular joint member (4) having a U-like cross section is joined at the upper side of the flocking table (3), but if the joint strength is difficult to obtain, it may be joined on the entire side of the flocking stand . Furthermore, when the portions of the flocked table to be joined and the outer shell of the replacement brush are cut as shown in FIG. 7, the contact surface with the joining member (4) is increased and the joining strength is increased. . The U-shaped interior is hollow.

  On the surface on the opposite side where the filaments of the flocking table (3) are flocked, the three convex structure shown in FIG. 8 is provided as a joint (12) with the shaft (6). The joint portion 12 may have a recess structure, but in order to reduce the size of the toothbrush head portion, the protrusion structure is preferable. Although the shape of the convex portion is substantially cylindrical in FIG. 8, a convex portion having no round cross section can also be used without any problem. In order to move the flocking table (3) smoothly, it is preferable to provide joints at three locations near the center of the flocking table (3) and near the left and right sides as shown in FIG. In order to make the size smaller, in the longitudinal direction of the electric toothbrush of the flocking table (3), one convex structure near the center of the flocking table (3) on the toothbrush tip end side, the left and right of the flocking table on the toothbrush holding part side It is preferable to provide a pair of convex structure near the side surface. In addition, although the magnitude | sizes of three convex part cross-sectional areas are substantially the same in FIG. 8, you may differ. In addition, in order to increase the durability of the joined state of the flocking table (3) and the shaft (6), the brush outer shell body (8) near the opposite side of the flocking table of the shaft (6) in contact with the joint (12) It is preferable to provide a structure (15) having a contact surface with When the joint (12) near the central part and the pair of joints (12) near the left and right side surfaces are separated in the longitudinal direction of the electric toothbrush of the flocking table (3), a plurality of structures (15) In the vicinity of the portion corresponding to each joint (12), or in the form of a uniform structure (15) in which they are joined, in which case the stress due to friction during movement becomes large, the energy It is not preferable from the viewpoint of efficiency. As shown in FIG. 7, a pair of convex portions in the vicinity of the left and right side surfaces of the flocked table located on the side of the toothbrush holding section are in the region near the central part of the flocked table in the longitudinal direction of the electric toothbrush or at the tip of the electric toothbrush By providing them, the number of the structures (15) can be reduced or the size can be reduced, so the contact area with the replacement brush outer shell (8) can be reduced. In addition, energy loss can be further reduced by changing to a plurality of small protrusion structures instead of the planar structure at the portion on the side of the replacement brush shell (8) in contact with the structure (15).

  In the mode of FIG. 7, the protrusion structure (14) is provided on the protrusion (13) and the shaft (6) on the replacement brush outer shell (8). When the method of joining the shaft (6) and the drive transmission part shown in FIG. 6 is adopted, the electric toothbrush is elongated relative to the shaft (6) when the replacement brush main body (7) is removed from the electric brush main body (1). The occurrence of a large stress in the direction may damage the internal structure of the replacement brush. Therefore, by providing the pair of structures, the above-mentioned breakage can be prevented by restricting the movement of the shaft (6). The means for restricting is not limited to the structure shown in FIG. 7, but as shown in FIGS. 7 and 8, the pair of left and right convex portions of the flocking table are arranged on the left and right sides near the approximate center of the bristles longitudinal direction of the flocking table. Even in the case where the end of the flocked table (3) in the direction of the electric toothbrush gripping portion is supported by the surface of the convex structure (14) provided on the shaft (6), the flocked table can be smoothly moved by moving on that surface. Can get exercise)

DESCRIPTION OF SYMBOLS 1 electric toothbrush main body 2 filament 3 flocking table 4 joint member 5 fixing part 6 shaft 7 replacement brush main body 8 replacement brush outer shell 9 flocking hole 10 recessed part 11 joined with electric toothbrush main body drive transmission part 11 brush part 12 flocking table (3) The joint part with the shaft (6) 13 The protrusion of the replacement brush outer shell (8) 14 The convex structure of the shaft (6) 15 The structure contacting the replacement brush outer shell (8) of the shaft (6)

Claims (6)

The flocking table (3) on which the filaments (2) are flocked is movably joined to the replacement brush shell (8) via the structurally deformable joining member (4),
The flocking table (3) and the drive transmission unit of the electric toothbrush main body are connected by a shaft (6) so that the flocking table can be rocked in accordance with the movement of the drive unit of the electric toothbrush main body.
Replacement brush for electric toothbrush that can be detached from the electric toothbrush main body (1).   The brush for electric toothbrush according to claim 1, wherein the deformable joining member (4) is made of elastomer, rubber or silicone.   The replacement brush for an electric toothbrush according to any one of claims 1 or 2, wherein the cross-sectional shape of the deforming joining member (4) is U-like or V-like.   The flocking table (3) and the electric toothbrush main body drive transmission unit are connected by a shaft (6) so that the flocking table (3) reciprocates or reversely moves. Replacement brush for electric toothbrush according to item 1.   5. The electric motor according to claim 4, wherein the flocking table (3) and the electric toothbrush main body drive transmission unit are connected by a shaft (6) so that the flocking table (3) reciprocates in the long axis direction of the replacement brush. Replacement brush for toothbrush. In the bonding member (4) having the U-like or V-like shape, the phase difference when the bonding member (4) is maximally deformed in the movement direction of the flocking table (3) is a (mm), the flocking table The replacement brush for an electric toothbrush according to claim 5, wherein the following formula is established when the amplitude at the time of exercise of (3) is b (mm).
0.5 * b + 0.1 ≦ a ≦ 0.5 * b + 1.0

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