CN1041690C - Arrangement of toothbrush bristles - Google Patents

Abstract

A toothbrush is provided with a first set of discrete tufts (31) that are generally rectangular in the cross section perpendicular to the tuft axis with the larger dimension running parallel to the side of the brush head (1). A second set of tufts (32) is provided at the end of the head (1) remote from the handle, this set of tufts, or single tuft, having a cross section perpendicular to the tuft axis that is either 'C' or 'U' shaped or rounded. The arrangement of bristle tufts described provides a lower brushing stiffness in a direction transverse to the longitudinal axis of the brush.

Description

Arrangement of toothbrush bristles

The invention relates to a novel toothbrush appliance, namely a toothbrush.

Toothbrushes are well known articles generally comprising a toothbrush handle with a bristle-carrying head at one end thereof, all centered along a longitudinal toothbrush axis. The bristles on such a toothbrush head are usually arranged in a pattern consisting of discrete tufts that are inserted into respective sockets on the bristle face of the toothbrush head and extend substantially perpendicular to the bristle face. In known toothbrushes, such tufts are of substantially circular cross-section and are inserted in respective receptacles of substantially circular cross-section on the toothbrush head.

The toothbrush whose bristles are arranged in a single "tuft" and basically covers the entire area of the bristle surface is found in, for example, US 4646381, which also discloses a toothbrush with round-section tufts, elliptical-section tufts and rectangular tufts. Some combination of tufts located in the middle of a larger tuft of many individual bristles covering most of the bristle face. US 4268933 discloses a toothbrush in which the bristles are arranged in large rectangular tufts whose long sides are substantially along the width of the toothbrush head. US2209173 discloses a toothbrush having elongated rectangular tufts - the long sides of which are substantially parallel to the toothbrush axis - alternating with co-inclined rectangular tufts in which the bristles are smoothed to form sharp-edged tufts .

The bending stiffness of a tuft of substantially circular cross-section in a direction perpendicular to the longitudinal axis of the bristles in the tuft, the tuft axis, is the same whether this direction is parallel or perpendicular to the axis of the toothbrush - i.e. along the width of the toothbrush of. This has the disadvantage that the stiffness of the tufts, when the toothbrush head moves substantially along the axis of the toothbrush, across the teeth and parallel to the gum line, is like when the head of the toothbrush moves substantially perpendicular to the axis of the toothbrush, up and down the teeth. Same as when moving across the gum line. It is desirable that the toothbrush be soft, ie, have less bending stiffness when brushing across the gum line, to prevent injury to the gum line.

The inventors have devised a toothbrush having a tuft pattern of elongated bristle tufts with rounded tufts at the end of the head remote from the handle.

For this reason, the present invention provides a kind of toothbrush, has a toothbrush handle and a toothbrush head at its one end place planting bristles, the bristles on the toothbrush head are all arranged in a pattern consisting of many individual hair bundles, the hair bundles from the toothbrush One bristle face of the head extends along a direction substantially perpendicular to the axis of the toothbrush, wherein the cross-section of one or more tufts of the first tuft is perpendicular to the axis of the tuft and has a larger dimension in a direction parallel to the axis of the toothbrush than Large in size perpendicular to the axis of the toothbrush, these tufts are combined with one or more second tufts at the end of the tuft pattern away from the toothbrush handle, the second tuft may be (i ) a pattern of individual tufts arranged in a substantially circular or polygonal shape; or (ii) a single tuft of substantially circular cross-section perpendicular to the bristle face; or (iii) a substantially " Bristle tufts of C" or "U" cross-section perpendicular to the bristle face, at least one branch of the "C" or "U" parallel to the axis of the toothbrush, and a circular bend of the "C" or "U" The end facing the bristle side away from the handle of the toothbrush.

The phrase "substantially parallel to the longitudinal axis of the toothbrush" includes all directions that are completely parallel to the longitudinal axis, as well as parallel to both longitudinal sides of the toothbrush head. "Substantially circular" includes semicircular.

Generally speaking, each first hair bundle accounts for no more than 25% of the bristle surface area of the entire toothbrush head, for example, no more than 20%, suitably less than 10%, preferably less than 5%, such as 1% of the bristle surface % to 2%. Generally, the ratio of the length of the long side parallel to the axis of the toothbrush to the width dimension perpendicular to the axis of the toothbrush is 1.5:1 or more, preferably 2:1 or more, such as 2.5: 1 or more, for example 2.5-3.5:1.

The cross-section of the first kind of bristle bundle can be substantially rectangular in the main part of the cross-section, and its long side is substantially parallel to the axis of the toothbrush. The term "substantially rectangular" includes rounded rectangles having two parallel long sides and two rounded ends, parallelograms, trapezoids, and especially rectangles with rounded corners.

The one or more tufts of the first type may also be other elongated polygonal or circular shapes with long sides parallel or approximately parallel to the axis of the toothbrush, such as a rhombus or a rectangle with one or more points; or an "L" shape having a first branch approximately parallel to the axis of the toothbrush and a second branch at an angle to the first branch, such as at an angle of 45° to the first branch; or a "V" shape with at least one The branches, preferably both branches, form an angle of less than 45° with the axis of the toothbrush.

The toothbrush may have a single tuft of the first type or a plurality of tufts of the first type, possibly composed of tufts of different cross-sectional shapes, for example, rectangular or a combination of rectangular and "L" shapes with rounded ends. The toothbrush of the present invention generally only has 2 to 25 first hair bundles, and its shape can be substantially rectangular or rounded.

For example, the toothbrush according to the first embodiment of the present invention has a pattern composed of a first hair bundle, the hair bundle cross-section is rectangular, and is perpendicular to the hair bundle axis, arranged on the bristle surface of the toothbrush, each first The long side of the bristle bundle is between about 1/10 and 9/10 of the length of the entire bristle surface, such as between 1/4 and 3/4, and its width is about 1/20 and 1/2 of the width of the bristle surface Between 1/10 and 1/2 is appropriate. Typically, each pattern of tufts of the first kind may have between 5 and 20 such tufts, for example between 5 and 12. Like this, this first kind of tuft is exactly a kind of pattern that is formed by each long rectangular or round-ended rectangular tuft, and the major axis of the tuft is roughly parallel to the bristle surface. The respective long sides of the first tufts are, for example, about 3/4 of the length of the face of the toothbrush, so that each tuft extends substantially along the entire length of the bristle face occupied by the respective first tuft. In addition, the long side of each first hair bundle can be, for example, about 1/10 to 1/2 of the length of the bristle face, so that these first kind of hair bundles can be arranged in 2 or more rows along the width of the bristle face, for example 2 to 6. In the first embodiment, each first type of bristle bundle can be arranged symmetrically with respect to the longitudinal axis of the toothbrush.

In addition, for example, the toothbrush described in the second embodiment of the present invention may have a tuft pattern comprising two or more rows of straight or curved first tufts arranged roughly along the width of the bristle surface. These rows are combined or interlaced with the third kinds of hair bundles, and the cross-section of each third kind of hair bundles is roughly circular, forming one or more straight or curved rows, which are roughly aligned along the width of the bristle surface . The first and third tufts of the second embodiment of the present invention may be arranged symmetrically along the longitudinal axis of the toothbrush.

Furthermore, the toothbrush according to the third embodiment of the present invention may have a pattern comprising two or more straight or curved rows of the first tuft, substantially aligned along the width of the bristle face, these The rows are combined or interlaced with the third kind of hair bundles, and each third kind of hair bundles form two or more straight or curved rows, which are roughly aligned along the width direction of the bristle surface, and the cross-section of the hair bundles is roughly rectangular like It is defined, and the long sides are arranged along the width direction of the bristle surface. The first and third tufts of the third embodiment may be arranged symmetrically about the longitudinal axis of the toothbrush.

Typically, in such a toothbrush there will be 2 to 5, eg 4, rows of tufts of the first type combined with 1 to 4, eg 3, rows of tufts of the third type. In each row of the first kind of hair bundle, there can be 2-5, such as 4, and the hair bundles are arranged side by side along the bristle width direction, and there can be 2-5 in each row of the third hair bundle, such as 4, the third kind of hair bundles with a roughly circular cross section, or 1-3, such as 2, the third kind of hair bundles with a roughly rectangular cross section, and the long sides of the hair bundles are arranged side by side along the width direction of the bristle surface.

In addition, the toothbrush described in the fourth embodiment of the present invention may have a pattern arranged on the bristle surface of the toothbrush composed of the first kind of hair bundles, the hair bundles are roughly rectangular in cross-section, perpendicular to the axis of the hair bundles, the second The respective long sides of a bristle bundle are between about 1/10 and 9/10 of the length of the entire bristle surface, generally between about 1/4 and 1/2. Generally, the pattern of tufts of the first type may comprise between 2 and 20 such tufts of the first type, for example between 5 and 12. These tufts of the first kind are combined with one or more tufts of the first kind in the shape of an "L", the first branch of the "L" being approximately parallel to the axis of the toothbrush, and the second branch forming an angle with the first branch, e.g. 45° to the first branch. Generally, these "L" shaped first hair bundles are arranged at one end of the bristle surface closest to the toothbrush handle. Each of the first hair bundles in the second embodiment of the present invention can be arranged symmetrically with respect to the longitudinal axis of the toothbrush, and the toothbrush in the present embodiment is most preferably provided with even numbers of such "L" on both sides of the longitudinal axis of the toothbrush. "Shaped first hair bundle.

When the tufts of the second type are in a pattern of tufts arranged in a generally circular or polygonal shape, the tufts of the second kind may have a tuft pattern of generally circular cross-section arranged around a central tuft It is circular, semicircular or polygonal, and each sharp angle thereof corresponds to the central hair bundle. Generally surrounding the central tuft is a regular pattern of these tufts arranged symmetrically, such as a hexagon, so that there is an equal number of second tufts, such as 3 tufts, arranged on both sides of the longitudinal axis of the toothbrush on each side of the . The diameter of such a pattern may generally be about 0.5 to 0.95 times the width of the bristle face adjacent to the pattern.

When each second hair bundle is a single substantially circular hair bundle such as a figure, ellipse or semicircular or semi-elliptical cross-section and perpendicular to the bristles, the diameter of this hair bundle can generally be the bristle near the hair bundle. About 0.5 to 0.95 times the face width.

When each second hair bundle forms a roughly "C"-shaped or "U"-shaped cross-section and is perpendicular to the bristle surface, and at least one branch is parallel to the longitudinal axis of the toothbrush and the "C" and "U" The diameter of the circular portion of the tuft may generally be about 0.6 to 0.9 times the width of the bristle face near the tuft when the rounded bend is towards the end of the bristle face away from the toothbrush handle. The longitudinal axis of the toothbrush bisects the "C" or "U" shape symmetrically.

Each tuft of above-mentioned substantially circular cross-section can complementarily or alternatively be replaced so that the dimension ratio of the tuft cross-section perpendicular to the axis of the toothbrush in a direction parallel to the axis of the toothbrush is in the direction perpendicular to the axis of the toothbrush The size should be large.

The bristles in the first, second and third tufts may be of substantially identical length so that the end faces of the tufts will be substantially flat. Alternatively, the length of the bristles in the direction of the axis of the tuft can vary at different points along the axis of the toothbrush or perpendicular to this axis. This variation applies in particular to toothbrushes according to the invention having, as described above, rows of alternating tufts of different cross-sections, such as the toothbrushes of the second and third embodiments, and each row can vary the length of the individual bristles contained therein. occasions. For example, the tufts may have "wavy" or "serrated" sides with alternating peaks and valleys relative to the axis of the toothbrush, such as described in the following patents: DE 3433763, WO91/19437, EP 0449653A, US 4672706, US 451911, US 4268933, US 3229318, US 3188673, US 2797429, US 1943225 and US 74,560 and so on.

Suitably, the first tuft comprises bristles of shorter length than the bristles of the second and third tufts, and the bristles of the second and third tufts are of the same length.

The bristles making up the individual tufts can be made of plastics such as nylon which are commonly used in toothbrush bristle technology. The bristles can have conventional structures, for example, filamentous bristle material with rounded polished ends.

The handle and head can be made of plastics commonly used in toothbrush handle technology. The toothbrush handle and toothbrush head can have an overall shape common in toothbrush technology, and the toothbrush handle can for example include one or more "V" shaped folds to improve the flexibility characteristics of the toothbrush handle, such as described in EP 0336641A, Toothbrush handle One or more grip enhancing portions such as rubber grip tufts such as those described in EP 0336641A may also be included.

Each tuft and each individual bristle can be inserted on the toothbrush head by conventional techniques. The best way to insert the bristles in the toothbrush head is to fuse the fixed ends of the bristles of the hair bundles to be fixed on the toothbrush head into one piece by heating, and this piece is followed by or at the same time, by putting each bristle or block The body and the toothbrush head material are heated to the softening point, then made to contact and fuse with the toothbrush head material, and then cooled and solidified, so that the hair bundles can be effectively welded together with the toothbrush head. Suitably, one or several sockets corresponding to the position, number and size of the tufts are preformed in the toothbrush head, and the tufts can then be fused together with the toothbrush head material around the sockets as described above . When making with this method, each bristle and toothbrush head all must be made by thermoplastic material, such as the known thermoplastic material that is used for toothbrush making at present, nylon. Proper processes for making toothbrushes in this way are described in US 2664316 and WO93/12690, the contents of which are hereby incorporated by reference.

Another method of making the toothbrush according to the present invention is that the tuft bristles can first be fused into a thermoplastic block with the above-mentioned tuft pattern by such as the above-mentioned fusion method, and then insert or insert this block by such as heat welding. It is fixed within a cavity of the toothbrush head, or alternatively the toothbrush head is also molded around the thermoplastic block.

Other methods of making toothbrushes of the present invention will be apparent to those skilled in the art.

The toothbrush of the present invention can be used by the user in a normal manner, and the various hair bundle patterns of the toothbrush of the present invention can improve the tooth-cleaning efficiency of the toothbrush and help reduce damage to the gums.

The present invention will be described below by means of embodiments with reference to the accompanying drawings, which are only for illustration and do not limit the general concept of the present invention. In the attached picture:

Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 show the perspective view of the toothbrush head of the present invention;

Fig. 6, Fig. 7, Fig. 8 and Fig. 9 show the plan view of the tuft pattern on the bristle face of the toothbrush head of the present invention;

Figure 10 shows a longitudinal section of the toothbrush of Figure 9 .

Referring to Fig. 1 to Fig. 5, toothbrush heads 1 are shown, and each toothbrush head 1 is integrally connected with a toothbrush handle 2. The toothbrush axis is shown as A-A in FIG. 1 , the hair bundle axis is shown as B-B in the illustration, and the width direction of the toothbrush head 1 is shown as C-C in FIG. 1 .

In Fig. 1 to Fig. 5, there are generally three hair bundles on each toothbrush head, and they extend in the direction of the hair bundle axis B-B, roughly perpendicular to the bristle surface 4 of the toothbrush head 1 .

In Fig. 1, the cross-section of the first kind of hair bundle 31 is rectangular and perpendicular to the axis B-B of the hair bundle, and has two arc ends, that is, it is round and long and rectangular. The pattern of the hair bundles is: the long side size of some hair bundles 31 is 0.5 times or more than the length of the bristle surface 4, which is much larger than its width, and the long sides are arranged roughly parallel to the axis of the toothbrush; The bundle 32 is relatively large, its cross section is circular and perpendicular to the axis B-B of the bundle of hair, and it is located at one end 4 of the bristle surface away from the handle 2 of the toothbrush.

In Fig. 2, the cross section of the first kind of hair bundle 31 is a round-headed strip rectangle and is perpendicular to the hair bundle axis B-B; the cross section of the first kind of hair bundle 34 is "L" shaped and perpendicular to the hair bundle axis B-B, which The cross-section of the first branch is rectangular, with the long side approximately parallel to the axis of the toothbrush, while the second branch 34A is at 45° to the first branch. The cross-section of the second hair bundle 32 is "U" shaped and perpendicular to the hair bundle axis B-B. The longitudinal axis A-A of the toothbrush bisects the "U"-shaped tuft between its two branches.

In Fig. 3, the first kind of hair bundle 31 is roughly rectangular, that is, the cross section perpendicular to the hair bundle axis B-B is rounded and rectangular, and arranged in a series of five arc-shaped rows, each row has four first kind of hair bundles 31 , the four first bristle bundles of each row are substantially aligned side by side along the width direction of the bristle surface 4 . At one end 4 of the bristle surface away from the toothbrush handle 2 is a pattern composed of the second kind of hair bundles 32 , each hair bundle is roughly circular in cross section and arranged in a symmetrical hexagonal pattern around a central hair bundle. The diameter taken by the second hair bundle 32 pattern through the center is about 0.9 of the bristle face 4 width.

In Fig. 4, the first kind of hair bundle 31 is roughly rectangular, that is, the cross section perpendicular to the hair bundle axis B-B is rounded and rectangular, and arranged in a series of four straight rows, each row has four first kind of hair bundles 31 , they are roughly aligned side by side along the width of the bristle surface 4. Between each row of first-type bristle bundles 31 , linear rows of third-type bristle bundles 33 are substantially aligned along the width direction of the bristle surface, and each bristle bundle 33 has a substantially circular cross-section. At one end of the bristle surface 4 away from the toothbrush handle 2 is a pattern area composed of the second kind of hair bundles 32, the cross section of which is roughly circular and arranged in a symmetrical hexagonal pattern around a central hair bundle. The second kind of hair bundle 32 and the third kind of hair bundle 33 are longer than the first kind of hair bundle in the direction B-B of the hair bundle axis.

In Fig. 5, the first kind of hair bundle 31 is roughly rectangular, that is, the cross section perpendicular to the hair bundle axis B-B is rounded and rectangular, arranged in a series of 4 straight rows, and each row has 4 first kind of hair bundles 31, they They are roughly aligned side by side along the width of the bristle surface 1 . Between the first kind of hair bundles 31 of each column, each straight row 33 of the third kind of hair bundles is staggered. And each third kind of tuft is roughly aligned along this edge. At the end of the bristle surface away from the toothbrush handle 2, there is a pattern 32 composed of the second kind of hair bundles, the cross section of which is roughly circular, and arranged in a symmetrical hexagonal pattern around a central hair bundle. The second kind of hair bundle 32 and the third kind of hair bundle 33 are longer than the first kind of hair bundle 31 in the direction of the hair bundle axis B-B.

Shown in FIGS. 6 to 9 are plan views of the toothbrush head 1 of the invention, viewed from the axis B-B.

In the toothbrush shown in Figs. 6 and 7, the pattern of the tufts 31, 32 is similar to that shown in Fig. 3 . The tuft pattern comprises the first kind of tuft 31, whose cross section is rounded and rectangular, and perpendicular to the axis B-B of the tuft, arranged in a bunch of horizontal rows, each row is roughly aligned along the width direction of the bristle surface 4, and these rows are shown in Fig. 6 It is arc-shaped as shown in Figure 3, and is straight in Figure 7, and the longitudinal dimension of each first kind of hair bundle 31 is such that 5 first kind of hair bundles occupy each first kind of hair bundle Occupies the bristle face 4 length. On the end of the bristle surface 4 away from the toothbrush handle 2 is a pattern 32 composed of the second kind of hair bundles. The cross section of the hair bundles is roughly circular and arranged in a symmetrical hexagon around a central hair bundle 32 .

In the toothbrush of Figures 8 and 9, the various patterns of tufts 31, 32, 33 are similar to those shown in Figures 4 and 5, respectively. These patterns include the first kind of bristle bundles 31 whose cross-section is rounded and rectangular, the cross-section is perpendicular to the bristle bundle axis B-B, and the bristle bundles are arranged in a series of straight rows, and each row is roughly aligned along the width direction of the bristle surface 4 . Between the courses of the first kind of tufts 31, the third kind of tufts 33 are arranged respectively. In FIG. 8, the cross-section of the third kind of hair bundle 33 is circular. In FIG. 9 , the cross-section of the third type of hair bundle 33 is roughly rectangular, that is, a round-ended rectangle, and its long sides are aligned along the width of the bristle surface 4 . At one end of the bristle surface 4 far away from the toothbrush handle 2 is a pattern of some third hair bundles 32, the hair bundles cross section is circular, and arranged in a symmetrical hexagon around a central hair bundle.

In FIG. 10, the toothbrush head shown in FIG. 9 is shown in longitudinal section about the offset axis D-D in FIG. The toothbrush comprises a toothbrush head 1, a toothbrush handle 2, a first kind of hair bundle 31, a second kind of hair bundle 32, and a third kind of hair bundle 33. Many individual bristles contained in the hair bundles 31, 32, 33 are all aligned in the direction of the hair bundle axis B-B, perpendicular to the bristle surface 4. The end of each bristle in the hair bundles 31, 32, 33 is heated to make it melt into a block 5, and then fixed on the toothbrush head 1 by cooling. The bristle surface 4 is provided with some jacks 6, and each block 5 is placed in a jack 6, and is welded together with the material of the toothbrush head 1 in situ, and both the toothbrush head material and the bristle material are thermoplastic. The toothbrush hair bundles 31, 32, 33 in Fig. 1 to Fig. 8 are respectively fixed on the toothbrush 1 as shown in Fig. 10 by the same method. The technique of welding the block 5 to the socket 6 can be that used in US 2664316 or WO 93/10639, or other known methods, and the method of packing the tufts 31, 32, 33 into the toothbrush head 1 is only symbolically illustrated one time.

Claims (22)

1, a kind of toothbrush, one toothbrush handles is arranged and at the head toothbrushes at one end place, the bristle of head toothbrushes all is arranged in the pattern of being made up of a plurality of single pieces, stretch out from a bristle face of head toothbrushes, direction basically with the toothbrush axis normal, it is characterized in that: the cross section of one or more first kind of pieces is perpendicular to the pieces axis, with toothbrush shaft line parallel direction on size than with toothbrush axis vertical direction on size big, these pieces are combined with the one or more second kind of pieces away from an end place of toothbrush handles at the pieces pattern, and to be that (i) is a kind of be arranged in basic patterns of forming for circular or polygonal many single pieces for second kind of pieces; Or (ii) a kind of vertical with bristle face basic be the single pieces of circular cross-section; Or (iii) a kind of be the pieces vertical of " C " shape or " U " tee section substantially with bristle face, at least one branch of " C " or " U " shape is parallel with the axis of toothbrush, and the circular bend portion of " C " or " U " shape is towards the end away from toothbrush handles of bristle face.

2, toothbrush according to claim 1 is characterized in that: the area that each first kind of pieces accounts for whole head toothbrushes bristle face is no more than 25%.

3, toothbrush according to claim 1 and 2 is characterized in that: the cross section perpendicular to the pieces axis of this first kind of pieces is rectangle substantially on the major part of its cross section, the long limit of rectangle roughly with the toothbrush shaft line parallel.

4, toothbrush according to claim 1 and 2, it is characterized in that: the one or more cross section perpendicular to the pieces axis in first kind of pieces is that other is the polygon or the Long Circle of strip substantially, its size that is parallel to the toothbrush axis be not less than 1.5: 1 perpendicular to ratio with the size of toothbrush axis.

5, toothbrush according to claim 4, it is characterized in that: the one or more cross section in first pieces is " L " shape, should " L " shape roughly constitutes with first branch shape, second branch at an angle with first branch of toothbrush shaft line parallel and one by one.

6, toothbrush according to claim 1 is characterized in that: having 2 to 25 first kind of pieces, all is roughly rectangular or the round end square-section.

7, toothbrush according to claim 1, it is characterized in that: each first kind of pieces is formed a pieces pattern, it has the rectangular cross section with the pieces axis normal haply, and be arranged on the bristle face, the long limit of each first kind of pieces is between about 0.1 and 0.9 times of bristle face length, its width is between 0.05 and 0.5 times of bristle face width, and 5 to 20 first kind of such pieces are arranged.

8, toothbrush according to claim 7 is characterized in that: each first kind of pieces has a long limit, thereby each pieces extends along first kind of occupied whole bristle face length of pieces basically.

9, toothbrush according to claim 7 is characterized in that: the length dimension of single first kind of pieces like this is to make each first kind of pieces to be arranged in two or more lines along the bristle face width.

10, toothbrush according to claim 1, it is characterized in that: it has a kind of pieces pattern, comprise the two or several straight or curved line of first kind of pieces, basically arrange along the bristle face width, be one or several straight or curved line of the third pieces of circular cross section in conjunction with having basic again, also arrange along the bristle face width substantially.

11, toothbrush according to claim 1, it is characterized in that: it has a kind of pieces pattern, comprise the two or more straight or curved line of first kind of pieces, substantially the width along bristle face comes into line, again in conjunction with the one or more straight or curved line of the third pieces, the cross section of the third pieces is rectangular, and the width of its long edge bristle face is arranged.

12, according to claim 10 or 11 described toothbrushes, it is characterized in that: it is that 2 to 5 lines of first kind of pieces combine with 1 to 4 row of the third pieces.

13, according to claim 10 or 11 described toothbrushes, it is characterized in that: 2 to 5 first kind of pieces are arranged side by side along the bristle face width.

14, according to claim 10 or 11 described toothbrushes, it is characterized in that: the third pieces in 2 to 5 rounded cross sections or 1 to 3 cross section the third pieces rectangular, the alignment of long edge bristle face width are arranged side by side along the bristle face width.

15, toothbrush according to claim 1, it is characterized in that: it has a kind of arranged in patterns of being made up of first kind of pieces on bristle face, the long limit of its each first kind of pieces is between 0.10 to 0.90 times of whole bristle face length, comprise 2 to 20 first kind of such pieces, first kind of pieces like this combines with first kind of pieces of one or more " L " shape, first branch of " L " shape is substantially parallel with the toothbrush axis, and second branch and first branch shape are at angle.

16, toothbrush according to claim 1, it is characterized in that: when each second kind of pieces has a kind of when being arranged in circular or polygonal pattern by each single pieces, each second kind of pieces like this has a kind of by the pieces pattern of circular cross-section haply, it is arranged in roughly a circle or a polygon around a center pieces, and polygonal each wedge angle is corresponding to the center pieces of this second pieces.

17, toothbrush according to claim 16 is characterized in that: 6 such pieces are hexagon pattern symmetric arrays around a center pieces, and in the both sides of the toothbrush longitudinal axis, every side all has 3 pieces to center on.

18, toothbrush according to claim 17 is characterized in that: the diameter of hexagon pattern is 0.5 to 0.9 times near the toothbrush bristle face width degree of hexagon pattern.

19, toothbrush according to claim 1 is characterized in that: when second kind of pieces was a pieces perpendicular to the rounded cross section of bristle face, the diameter of this pieces was near the 0.5-0.95 of the bristle face width of pieces doubly.

20, toothbrush according to claim 1, it is characterized in that: when second kind of pieces be vertical " C " shape or " U " tee section with bristle face pieces, have a branch and " C " and " U " parallel at least with the longitudinal axis of toothbrush circular bend portion towards away from bristle face one end of toothbrush handles the time, the diameter of circular bend portion be near the bristle face width pieces 0.6-0.9 doubly.

21, toothbrush according to claim 1 is characterized in that: the length of first kind of pieces is littler with the length of the third pieces than second, and the length of second and third kind pieces is the same.

22, toothbrush according to claim 1, it is characterized in that: pack into the process of head toothbrushes of each pieces and each individual bristle is, the end stiff end that remains to be fixed in the head toothbrushes of each bristle in the pieces becomes a block by heating and fusing, again by each bristle, or this block, be heated to softening point with the head toothbrushes material, make the two contact so that welding, and subsequently or simultaneously block and head toothbrushes material are fused together, make it cooled and solidified then, thus make pieces effectively welding on head toothbrushes.

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