CN219538548U

CN219538548U - Electric toothbrush head and electric toothbrush

Info

Publication number: CN219538548U
Application number: CN202320077550.8U
Authority: CN
Inventors: 梁慧嘉
Original assignee: Guangzhou Stars Pulse Co Ltd
Current assignee: Guangzhou Stars Pulse Co Ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-08-18
Anticipated expiration: 2033-01-10

Abstract

The embodiment of the utility model provides an electric toothbrush head and an electric toothbrush, wherein the electric toothbrush head comprises a brush rod, a brush plate and bristles. The brush rod is provided with a first end and a second end which are opposite in the length extending direction, the first end is provided with a connecting port, and the connecting port is used for being connected with a connecting shaft of the electric toothbrush; the brush plates are connected to the second end, each brush plate is provided with a hair-planting surface, each brush plate is provided with a thickness direction, a width direction and a length direction which are mutually perpendicular, and the hair-planting surfaces are arranged on one side in the thickness direction; the brush hair sets up in planting the hair face, and the brush hair has the brush hair projection district on planting the hair face along thickness direction, and the brush hair projection district has first length and first width along length direction and width direction respectively, and first width is more than or equal to 12mm and less than or equal to 20mm, and the ratio of first width and first length is more than or equal to 0.6 and less than 1. The embodiment of the utility model can increase the coverage area of the brush hair in the width direction of the brush hair, reduce the probability of missing the cleaning area during brushing, and improve the brushing efficiency.

Description

Electric toothbrush head and electric toothbrush

Technical Field

The utility model relates to the technical field of oral cavity cleaning, in particular to an electric toothbrush head and an electric toothbrush.

Background

In the related art, an electric toothbrush is driven to reciprocate axially around a motor by a brush head to clean a user's mouth. The brush hair on the brush head is generally in a long strip shape distributed along the axial direction of the motor, the width is too narrow, the brush hair needs to be horizontally placed in the tooth brushing process, the brush hair can not cover tooth surface areas of teeth in the up-down direction, and the missing cleaning areas exist in tooth brushing.

Disclosure of Invention

The utility model provides an electric toothbrush head and an electric toothbrush, which can increase the coverage area of bristles in the width direction of the bristles and reduce the probability of missing cleaning areas during brushing.

A first aspect of an embodiment of the present utility model provides an electric toothbrush head comprising:

a brush bar having a first end and a second end opposite in length extension, the first end having a connection port for connection with a connection shaft of an electric toothbrush;

the brush plates are connected to the second end, each brush plate is provided with a bristle planting surface, each brush plate is provided with a thickness direction, a width direction and a length direction which are mutually perpendicular, and the bristle planting surfaces are arranged on one side of the thickness direction; the method comprises the steps of,

the brush hair is arranged on the bristle planting surface, the brush hair is provided with a brush hair projection area along the thickness direction, the brush hair projection area is provided with a first length and a first width along the length direction and the width direction respectively, the first width is more than or equal to 12mm and less than or equal to 20mm, and the ratio of the first width to the first length is more than or equal to 0.6 and less than 1.

Further, the product of the first width and the first length is 180mm or more ² And less than or equal to 400mm ² 。

Further, the outer contour of the bristle projection region comprises:

the two first straight edges are distributed at intervals along the width direction and are parallel to the length direction;

the two ends of the first arc-shaped edge are respectively connected with one ends of the two first straight-line edges, which are far away from the brush rod, and are convexly arranged in an arc shape in the direction away from the brush rod;

the two ends of the second arc-shaped edge are respectively connected with one ends of the two first straight edges, which are close to the brush rod, and the two ends of the second arc-shaped edge are convexly arranged in an arc shape towards the direction close to the brush rod.

Further, the length of the first straight edge is not less than 6mm, the brush plate is provided with a side surface, the side surface is connected with the bristle planting surface, an intersecting line is a second straight edge which is parallel to the first straight edge and equal in length, the side surface is a plane, or the height of the side surface arched relative to the second straight edge along the width direction is not more than 1mm.

Further, the distance between the outer contour line of the bristle projection area and the outer contour line of the bristle planting surface is less than or equal to 2mm; and/or, the ratio of the area of the bristle projection area to the area of the bristle planting surface is greater than or equal to 80%.

Further, along the width direction, the first end of the brush rod has a second width, and a ratio of the first width to the second width is greater than or equal to 0.8 and less than or equal to 1.2.

Further, in the thickness direction, the brush plate has a first thickness of 3mm or more and 4.5mm or less.

Further, along the thickness direction, the brush plate and the bristles have a second thickness in common, and a ratio of the second thickness to the first thickness is 3.5 or more and 5 or less.

Further, the cross section perpendicular to the length extending direction of the brush plate is gradually transited from a round shape to an oblate shape from the first end of the brush rod to the direction of the second end, the cross section at the joint of the second end and the brush plate is an oblate cross section, and the width dimension of the oblate cross section along the width direction is larger than the thickness dimension along the thickness direction.

Further, the bristle includes:

the middle brush wires are positioned in the middle of the bristle planting surface, and the closer to the center of the bristle planting surface, the higher the protrusion height of the middle brush wires relative to the bristle planting surface is; and

the plurality of peripheral brush wires are arranged around the middle brush wires in a surrounding manner.

Further, the heights of the peripheral side brush filaments relative to the bristle planting surface are equal.

Further, the bristle includes:

the middle brush filaments are positioned in the middle of the bristle planting surface; and

the peripheral side brush filaments are arranged around the middle brush filaments in a surrounding mode, and at least the peripheral side brush filaments are sharpening brush filaments.

Further, a first included angle is formed between the length extending direction of the brush rod and the length direction, and the first included angle is greater than or equal to 5 degrees and less than or equal to 20 degrees, or the first included angle is greater than or equal to 160 degrees or less than or equal to 175 degrees.

The second aspect of the present utility model provides an electric toothbrush comprising:

a powered toothbrush head as claimed in any one of the preceding claims; and

the brush holder assembly comprises a brush holder and a connecting shaft extending from the brush holder, wherein the connecting shaft is detachably connected with the brush rod, and the connecting shaft can drive the electric toothbrush head to vibrate reciprocally around the length extending direction.

According to the electric toothbrush head and the electric toothbrush provided by the embodiment of the utility model, the first width of the bristle projection area is designed to be more than or equal to 12mm and less than or equal to 20mm, so that the bristles have a wide enough width, and in the brushing process of the electric toothbrush, the bristles can cover the tooth surfaces of teeth in the up-down direction of the teeth by combining the reciprocating vibration of the bristles, even can cover the outer side surfaces of the upper teeth and the lower teeth which are engaged together in some cases, the probability of missing a cleaning area is reduced, the upper teeth and the lower teeth can be cleaned at one time under the condition that the toothbrush does not swing up and down manually, and the brushing efficiency and the cleaning effect are improved. And the ratio of the first width of the bristle projection area to the first length of the bristle projection area is more than or equal to 0.6 and less than 1, so that the bristles have a proper length-width ratio, the width is large, the length is larger than the width, the tooth surface area covered by the bristles is ensured, and the cleaning efficiency is further improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an assembled structure of an electric toothbrush head in accordance with one embodiment of the present utility model;

FIG. 2 is an exploded view of an electric toothbrush head according to one embodiment of the present utility model;

FIG. 3 is a schematic view of a portion of a brush head according to an embodiment of the present utility model;

FIG. 4 is a schematic perspective view of a brush head according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a brush head according to another embodiment of the present utility model;

fig. 6 is a schematic cross-sectional view taken along the F-F section in fig. 5.

Fig. 7 is a schematic view of a brush head according to another embodiment of the present utility model.

Reference numerals illustrate: 1-an electric toothbrush; 10-an electric toothbrush head; 11-a brush bar; 11 a-connection port; 111-a first end; 112-a second end; 12-brushing the plate; 121-a hair planting surface; 1211-a second straight edge; 1212-a third arcuate edge; 122-back; 123-side; 13-brushing; 131-bristle projection region; 132-the outer contour of the bristle projection region; 1321-first straight edge; 1322-a first arcuate edge; 1323-a second arcuate edge; 133-bristle tufts; 134-brushing the middle part; 135-brushing the periphery; a 20 brush handle assembly; 21-a brush handle; 22-connecting shaft.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. Referring to fig. 1-2, an embodiment of the present utility model provides an electric toothbrush 1 for cleaning teeth of a user. The electric toothbrush 1 includes an electric toothbrush head 10 and a handle assembly 20.

The handle assembly 20 is adapted to be held by a user for use of the electric toothbrush 1 by the user. Handle assembly 20 may include a handle 21 and a connecting shaft 22 extending from handle 21. Handle assembly 20 also typically includes a vibration motor (not shown), with the end of connecting shaft 22 within handle 21 being drivingly connected to the vibration motor.

The electric toothbrush head 10 is connected with one end of the connecting shaft 22 extending out of the brush handle 21, and the vibration motor can drive the electric toothbrush head 10 to vibrate reciprocally through the connecting shaft 22 in the tooth brushing process, so that the electric toothbrush head 10 cleans tooth surfaces. Further, the electric toothbrush head 10 is detachably connected to the connection shaft 22 so as to be replaced with a different type of electric toothbrush head 10, or a new electric toothbrush head 10 can be replaced when the electric toothbrush head 10 is used long enough to cause a decrease in cleaning effect.

In some embodiments, the electric toothbrush head 10 includes a brush bar 11, a brush plate 12, and bristles 13 connected in sequence.

The brush bar 11 is used to integrally connect the powered toothbrush head 10 to the connecting shaft 22 of the handle assembly 20. The brush rod 11 is generally elongated in shape as a whole and has a length extending direction L-L, and the brush rod 11 has a first end 111 and a second end 112 opposite to each other in the length extending direction L-L thereof, that is, the first end 111 and the second end 112 are both ends in the length extending direction L-L thereof of the brush rod 11, respectively. Specifically, the vibration motor housing can drive the connecting shaft 22 and the electric toothbrush head 10 to reciprocally rotate around the length extending direction L-L, thereby cleaning tooth surfaces.

The first end 111 has a connection port 11a, the connection port 11a is used for being connected with a connection shaft 22 of the electric toothbrush 1, specifically, one end, extending out of the brush handle 21, of the connection shaft 22 is inserted into the connection port 11a and clamped with the first end 111, so that the connection shaft 22 and the brush rod 11 are fixedly connected, and the brush rod 11 cannot fall off from the connection shaft 22 during the working process of the vibrating motor. The brush bar 11 can be pulled out from the connecting shaft 22 by applying a proper force, so that the brush bar 11 can be detached from the connecting shaft 22, and the electric toothbrush head 10 can be replaced conveniently. That is, the detachable connection of the electric toothbrush head 10 and the connection shaft 22 is achieved by connecting the brush bar 11 to the connection shaft 22 in a pluggable manner.

Referring to fig. 1-4, a brush plate 12 is provided for carrying bristles 13 and for attachment to a brush bar 11. The brush plate 12 has a bristle bearing surface 121, and bristles 13 are attached to the bristle bearing surface 121. The brush plate 12 is substantially in the shape of a long plate, and the brush plate 12 has a longitudinal direction A-A, a width direction B-B and a thickness direction C-C perpendicular to each other, that is, the longitudinal direction A-A of the brush holder 21 is perpendicular to both the width direction B-B and the thickness direction C-C of the brush holder 21, and the width direction B-B of the brush holder 21 is perpendicular to the thickness direction C-C of the brush holder 21. It will be appreciated that the brush plate 12 itself has a length direction A-A that is substantially the same as the length extension of the brush bar 11 (which may be slightly angled due to the forward or rearward tilting of the brush plate 12). The thickness direction C-C of the brush plate 12 itself is substantially the same as the direction in which the filaments of the bristles 13 extend (which may be slightly angled due to the inclination of the bristles).

As shown in fig. 4, the bristle surface 121 intersects the thickness direction C-C of the brush bar 11 on one side in the thickness direction C-C, that is, the bristle surface 121. Illustratively, the bristle bearing surface 121 may be planar and perpendicular to the thickness direction C-C. One end of the brush plate 12 in the length direction A-A is connected to the second end 112 of the brush rod 11. Specifically, the brush plate 12 may be integrally formed with the brush rod 11, or may be formed separately from the brush rod 11 and connected together, and the specific connection manner of the brush plate 12 and the brush plate 12 is not limited in this embodiment.

As shown in fig. 3 to 4, bristles 13 are set on the bristle surface 121 for contact with tooth flanks to clean the tooth flanks. The bristles 13 have bristle projection areas 131 (areas surrounded by broken lines in fig. 3) on the bristle bearing surface 121 in the thickness direction C-C. Illustratively, the bristles 13 may comprise a plurality of tufts or bundles of bristles, one tuft or bundle of bristles comprising a plurality of filaments, the filaments being in the form of filaments and being extendable in a thickness direction C-C in a direction away from the bristle surface 121, in which case the bristle projection area 131 is substantially the area enclosed by projections of all the filaments in the length direction of the bristle surface 121, and since at least some of the filaments are spaced apart from each other on the bristle surface 121, the spacing between the filaments is substantially free of projections on the bristle surface 121, the bristle projection area 131 referred to in this embodiment is substantially the area enclosed by the outer contour 132 (dashed line in fig. 3) of the entirety of all the filaments projected on the bristle surface 121.

As shown in fig. 3, the bristle projection region 131 has a first length L1 in the length direction A-A, the bristle projection region 131 has a first width W1 in the width direction B-B, the first width W1 is 12mm or more and 20mm or less, and a ratio of the first width W1 to the first length L1 is 0.6 or more and less than 1. It will be appreciated that since the first width W1 may take on values between 12mm and 20mm, for example 12mm, 15mm, 16mm, 18mm, 20mm; the ratio of the first width W1 to the first length L1 may also take on values between 0.6 and 1, such as 0.6, 0.7, 0.8, 0.9, 1. Thus, the length value of the first length L1 may be determined from a certain determined width value of the first width W1 and a certain determined ratio of the first width W1 to the first length L1. It is understood that the first length L1 of the bristle projection region 131 can be equivalent to the length of the entire bristle 13 in the length direction A-A, and the first width W1 of the bristle projection region 131 can be equivalent to the width of the entire bristle 13 in the length direction A-A.

In the related art, the whole brush head of the electric toothbrush is generally in a strip shape, the width is narrower, and when the electric toothbrush is used for brushing teeth, the brushing process is generally as follows: after the brush head is pressed on the tooth surface for cleaning for a certain period of time (for example, 5 seconds), the brush hair 13 is moved to another position for cleaning so as to clean different positions of the tooth surface; or, during brushing, the brush head is slowly moved transversely along the left and right directions of the teeth so that the brush head cleans different positions of the tooth surface. Since the vibration motor of the electric toothbrush outputs high-frequency vibration to drive the brush head to vibrate reciprocally, when the electric toothbrush is used for cleaning tooth surfaces, a user usually does not swing the toothbrush up and down like a manual toothbrush to brush teeth, especially when the user brushes an incisor area and a lower tooth area opposite to the incisor, the user usually bites the upper teeth and the lower teeth, and the width of the brush head cannot be covered at all for the electric toothbrush. Therefore, when the electric toothbrush is used for brushing teeth, the upper teeth and the lower teeth are required to be opened respectively for fixed-point cleaning, the brushing habit of closing the upper teeth and the lower teeth in the middle area of the user is not met, or the electric toothbrush is required to be swung up and down for cleaning, and the brushing habit of fixed-point cleaning by the user by using the electric toothbrush is not met; if the user still adopts the cleaning habit that the upper teeth and the lower teeth are closed and the electric toothbrush is fixed, the cleaning position is omitted, and the cleaning effect is poor.

In the embodiment of the utility model, the first width W1 of the bristle projection region 131 is designed to be more than or equal to 12mm and less than or equal to 20mm, so that the bristles 13 have a wide enough width, and in combination with the reciprocating vibration of the bristles 13, the bristles 13 can cover the tooth surfaces of teeth in the up-down direction of the teeth in the brushing process of the electric toothbrush 1, even can cover the outer side surfaces of the upper teeth and the lower teeth which are engaged together in some cases, the probability of missing a cleaning region is reduced, the upper teeth and the lower teeth can be cleaned at one time without manually swinging the toothbrush up and down, and the brushing efficiency and the cleaning effect are improved. And the ratio of the first width W1 of the bristle projection region 131 to the first length L1 of the bristle projection region 131 is greater than or equal to 0.6 and less than 1, so that the bristles 13 have a suitable aspect ratio, and the width is large, the length is larger than the width, the tooth surface area covered by the bristles is ensured, and the cleaning efficiency is further improved.

When the first width W1 of the bristle projection region 131 is less than 12mm, the width of the bristles 13 is too narrow, the bristles 13 cannot cover tooth surfaces in the up-down direction of teeth, resulting in easy existence of missing cleaning areas, and reduced brushing efficiency. When the first width W1 of the bristle projection region 131 is greater than 20mm, since the brush plate 12 is at least slightly wider than the bristles 13, that is, the width of the brush plate 12 in the width direction B-B is also greater than 20mm, the brush plate 12 and the brush plate 12 are supported between the upper and lower gums in the up-down direction of the teeth, not only making it difficult for the electric toothbrush head 10 to brush teeth in the mouth, but also making it difficult for the electric toothbrush head 10 to move laterally in the mouth, and also making the mouth of the user feel a strong foreign body sensation, resulting in reduced brushing comfort.

When the ratio of the first width W1 to the first length L1 of the bristle projection region 131 is less than 0.6, the overall size of the bristles 13 is relatively slim, which also results in the bristles 13 not covering the tooth surface in the up-down direction of the teeth, having a dead cleaning angle, and resulting in reduced brushing efficiency. When the ratio of the first width W1 to the first length L1 of the bristle projection region 131 is 1 or more, the widths of the bristles 13 and the brush plate 12 are too wide, so that the brush plate 12 and the brush plate 12 are supported between the upper and lower gums in the up-down direction of the teeth, not only making it difficult for the electric toothbrush head 10 to brush teeth in the mouth, but also making it difficult for the electric toothbrush head 10 to move laterally in the mouth, and causing the user to have a strong feeling of foreign matter in the mouth, resulting in reduced brushing comfort; and the first length L1 of the bristles 13 is too short, resulting in a reduction in the contact area of the bristles 13 with the tooth surface in the lateral direction of the teeth (i.e., in the left-right direction), resulting in a reduction in brushing efficiency.

With continued reference to FIG. 3, in some embodiments, the product of the first width W1 and the first length L1 is 180mm or more ² And less than or equal to 400mm ² . When the bristle field 131 is approximately rectangular, the product of the first width W1 and the first length L1 is approximately equal to the area of the bristle field 131, i.e., the area of the bristle field 131 is approximately 180mm ² -400mm ² In this way, the brush hair 13 has a larger contact area with the tooth surface, so that the tooth brushing efficiency can be improved, and the brush hair 13 has a sufficiently large coverage area and a sufficiently large coverage width in combination with the fact that the brush hair projection area 131 defined above has a first width W1 in the width direction B-B, the first width W1 is more than or equal to 12mm and less than or equal to 20mm, and the ratio of the first width W1 to the first length L1 is more than or equal to 0.6 and less than 1", so that the tooth surfaces of two rows of teeth in the upper and lower directions can be covered, and the probability of missing the cleaning area is further reduced.

With continued reference to fig. 3, in some embodiments, the bristle projection region 131 has an outer contour 132, and the outer contour 132 of the bristle projection region 131 can be understood as the outer contour that the projection of the bristles 13 on the bristle bearing surface 121 in the thickness direction C-C as a whole has, and the outer contour 132 encloses the bristle projection region 131.

Illustratively, the outer contour 132 of the bristle projection region 131 includes two first straight edges 1321, a first arcuate edge 1322, and a second arcuate edge 1323.

The two first straight edges 1321 are spaced apart in the width direction B-B and parallel to the length direction A-A, and the two first straight edges 1321 may be designed to be equal in length and have end portions flush in the width direction B-B.

The first arc-shaped edge 1322 is in an arc-shaped arrangement, two ends of the first arc-shaped edge 1322 are respectively connected to one ends of the two first straight-line edges 1321 far away from the brush rod 11, namely, one end of the first arc-shaped edge 1322 is connected to one end of one first straight-line edge 1321 far away from the brush rod 11, the other end of the first arc-shaped edge 1322 is connected to one end of the other first straight-line edge 1321 far away from the brush rod 11, and the first arc-shaped edge 1322 is in an arc-shaped protruding arrangement in a direction away from the brush rod 11, so that the area of the bristle projection area 131 can be increased. In addition, when the electric toothbrush head 10 is used, the first straight edge 1321 of the bristle 13 is placed transversely, the extending direction is approximately the same as the extending direction of the gingival sulcus, unlike the oval bristle, an area which cannot be covered exists, or the bristle 13 with the first straight edge 1321 can cover the tooth surface more comprehensively only by being partially contacted with the gingiva beyond the gingival sulcus and damaging the gingiva. The gingival sulcus is a channel formed at the junction of the root of a tooth and the gingiva.

The second arc-shaped edge 1323 is in an arc-shaped arrangement, two ends are respectively connected to one ends of the two first straight-line edges 1321, which are close to the brush rod 11, and arc-shaped protruding is arranged towards the direction close to the brush rod 11, namely, one end of the second arc-shaped edge 1323 is connected to one end of one first straight-line edge 1321, which is close to the brush rod 11, the other end of the second arc-shaped edge 1323 is connected to one end of the other first straight-line edge 1321, which is close to the brush rod 11, and the second arc-shaped edge 1323 is arc-shaped protruding towards the direction close to the brush rod 11, so that the area of the bristle projection area 131 can be increased.

The outer contour 132 of the brush plate 12 is substantially waist-shaped when viewed from the thickness direction C-C by combining the two first straight sides 1321, the first curved side 1322 and the second curved side 1323, and the outer contour 132 of the brush plate 12 is substantially identical to the bristle projection area 131 in shape, so that the two second straight sides 1211 are distributed on the outer contour of the brush plate 12 in the width direction B-B, and the second straight sides 1211 are relatively flat, so that the brush plate 12 can be conveniently moved laterally in the left-right direction of the teeth in the oral cavity to switch the cleaning position without giving excessive irritation to the oral mucosa, and the comfort of the oral cavity is improved when the electric toothbrush head 10 is moved laterally.

The outer contour line of the brush plate 12 is provided with a third arc-shaped edge 1212 at one side far away from the brush rod 11, the third arc-shaped edge 1212 is positioned at the outer side of the first arc-shaped edge 1322, and in the inlet and the transverse movement process of the electric toothbrush head 10, the third arc-shaped edge 1212 is smooth and round, so that the comfort of the oral cavity of a user in the inlet and the transverse movement process of the electric toothbrush head 10 can be improved.

In addition, referring to fig. 3, the filaments in the bristles 13 may form a plurality of bristle clusters 133, at least a portion of the bristle clusters 133 may be arranged between the two first straight edges 1321 along the width direction B-B, and the arrangement direction of the bristle clusters 133, that is, the width direction B-B, is parallel to the extending direction of the slits between the two adjacent teeth, so that the bristle clusters 133 arranged along the width direction B-B may cover longer slits and extend deeper into the slits, thereby improving the cleaning efficiency and cleanliness of the slits.

With continued reference to fig. 3, in some embodiments, the length L2 of the first straight edge 1321 is not less than 6mm, so that the first straight edge 1321 is long enough to increase the area between the two first straight edges 1321, so that the area of the bristle projection area 131 between the two first straight edges 1321 is larger, and the contact area between the bristles 13 and the tooth surface in the length direction A-A (i.e. the left-right direction of the teeth) is larger, thereby improving the brushing efficiency.

When the length L2 of the first straight sides 1321 is less than 6mm, the length of the first straight sides 1321 is too short, resulting in too small a bristle projection area 131 between the two first straight sides 1321, and the contact area of the bristles 13 with the tooth surface in the length direction A-A (i.e., the left-right direction of the teeth) becomes small, resulting in reduced brushing efficiency.

Referring to fig. 4, further, the brush plate 12 further has a back surface 122 opposite to the bristle surface 121. The brush plate 12 also has a side 123, the side 123 being located between the bristle face 121 and the back face 122. The side 123 is connected to the bristle surface 121 and the intersecting line is a second straight edge 1211 parallel to and equal in length to the first straight edge 1321, and the side 123 is a plane.

Alternatively, referring to fig. 3, the height H of the side 123 arched along the width direction B-B relative to the second straight edge 1211 is not more than 1mm, so that the side 123 does not press the gums to a greater extent to cause gum discomfort, and the size of the brush plate 12 is not much larger than the bristle projection area 131, so that the occupied area of the bristles 13 on the brush plate 12 can be increased, and under the condition that the contact area of the bristles 13 with tooth surfaces is the same and the tooth brushing efficiency is the same, the size of the brush plate 12 can be reduced, the entrance of the electric toothbrush head 10 and the movement in the oral cavity can be facilitated, and the comfort of the electric toothbrush head 10 during tooth brushing can be improved.

Conversely, when the height H of the side 123 arched in the width direction B-B with respect to the second straight edge 1211 exceeds 1mm, the side 123 presses the gums to a greater extent, resulting in gum discomfort, and the size of the brush plate 12 is much larger than the bristle projection area 131, reducing the area occupied by the bristles 13 on the brush plate 12, and in the case where the contact area of the bristles 13 with the tooth surface is the same, resulting in an increased size of the brush plate 12, which is disadvantageous for the entrance of the electric toothbrush head 10 and moves in the oral cavity, resulting in an enhanced feeling of foreign matter upon brushing of the electric toothbrush head 10.

In some embodiments, the distance D between the outer contour 132 of the bristle projection region 131 and the outer contour of the bristle bearing surface 121 is less than or equal to 2mm, so that the brush plate 12 does not protrude much relative to the bristles 13, and therefore does not press the gums to a large extent, causing gum discomfort, nor does the size of the brush plate 12 be much larger than the bristle projection region 131, so that the area occupied by the bristles 13 on the brush plate 12 can be increased, and the size of the brush plate 12 can be reduced under the condition that the contact area of the bristles 13 with the tooth surfaces is the same and the tooth brushing efficiency is the same, thereby facilitating the entrance of the electric toothbrush head 10 and the movement in the oral cavity.

When the distance D between the outer contour 132 of the bristle projection region 131 and the outer contour 132 of the bristle-planting surface 121 is greater than 2mm, the brush plate 12 protrudes much with respect to the bristles 13, the brush plate 12 presses the gums to a large extent, causing gum discomfort, and the size of the brush plate 12 is much larger than the bristle projection region 131, reducing the area occupied by the bristles 13 on the brush plate 12, and under the conditions that the contact area of the bristles 13 with the tooth surfaces is the same and the tooth brushing efficiency is the same, causing an increase in the size of the brush plate 12, resulting in an enhanced feeling of foreign matter when the electric toothbrush head 10 brushes.

With continued reference to fig. 3, in still other embodiments, the ratio of the area of the bristle projection region 131 to the area of the bristle surface 121 is 80% or more, which can effectively improve the utilization rate of the bristle surface 121, and the brush plate 12 does not protrude far from the bristles 13, so that the bristles 13 do not squeeze the gums to a great extent to cause gum discomfort, and the size of the brush plate 12 can be reduced under the conditions that the contact area between the bristles 13 and the tooth surface is the same and the tooth brushing efficiency is the same, so that the electric toothbrush head 10 can be more conveniently moved in the mouth and entrance.

In the case where the ratio of the area of the bristle projection region 131 to the area of the bristle bearing surface 121 is less than 80%, the utilization rate of the bristle bearing surface 121 is lowered, the area of the brush plate 12 where bristles are not mounted is increased, the brush plate 12 protrudes excessively with respect to the bristles 13, which may hinder the bristles 13 from covering the tooth surfaces, and may be disadvantageous for the entrance of the electric toothbrush head 10 and movement in the oral cavity.

Referring to fig. 4-5, in some embodiments, along the width direction B-B, the first end 111 of the brush rod 11 has a second width W2, and a ratio of the first width W1 to the second width W2 is greater than or equal to 0.8 and less than or equal to 1.2. In this way, the second width W2 of the first end 111 of the brush rod 11 is substantially the same as the first width W1 of the brush plate 12, and the ratio of the entire electric toothbrush head 10 in width is more consistent, so that the situation that the first width W1 of the electric toothbrush head 10 is much larger than the second width W2 of the first end 111 of the brush rod 11, resulting in light weight and reduced connection stability of the electric toothbrush head 10 and the connection shaft 22 is not exhibited.

When the ratio of the first width W1 to the second width W2 is smaller than 0.8, the width of the brush plate 12 is too small, which means that the width of the first end 111 of the brush rod 11 and the connection between the first end 111 and the brush holder 21 is too large, and the probability of noise generated by collision of the brush rod 11 and the brush holder 21 is increased due to the too large connection width. When the ratio of the first width W1 to the second width W2 is greater than 1.2, the width dimension of the brush plate 12 is excessively large, which shows that the first width W1 of the electric toothbrush head 10 is much greater than the second width W2 of the first end 111 of the brush holder 11, resulting in a light head and foot of the electric toothbrush head 10 (the brush plate 12 is heavy, the brush holder 11 is light), and a reduced connection stability of the electric toothbrush head 10 with the connection shaft 22.

Referring to fig. 5-6, in some embodiments, a cross-section of the brush plate 12 perpendicular to the length extending direction L-L from the first end 111 toward the second end 112 of the brush rod 11 gradually transitions from circular to oblate, and a cross-section of the junction of the second end 112 and the brush plate 12 is an oblate cross-section (with a cross-sectional line area in fig. 6), and a width dimension W3 of the oblate cross-section along the width direction B-B is greater than a thickness dimension H3 along the thickness direction C-C. That is, the cross section of the first end 111 of the brush rod 11 connected to the connecting shaft 22 is circular, so that the connecting port 11a for connecting to and disconnecting from the connecting shaft 22 is formed at the first end 111.

The cross section of the second end 112 of the brush rod 11 connected with the brush plate 12 is in a flat circular shape, since the brush plate 12 is in a long plate shape, the cross section of the connection part of the second end 112 and the brush plate 12 is in a flat circular cross section, the width W3 of the flat circular cross section along the width direction B-B is larger than the thickness H3 along the thickness direction C-C, the shape of the second end 112 and the shape of the brush plate 12 can be corresponding, the connection area of the second end 112 and the brush plate 12 can be increased, the connection stability between the second end 112 and the brush plate 12 is improved, the connection position of the second end 112 and the brush plate 12 is smooth, a step structure cannot appear, the mouth cannot be pressed, and the electric toothbrush head 10 moves in the oral cavity more comfortably.

If the cross section of the second end 112 is still the same circular shape as the first end 111, and the cross section of the end of the brush plate 12 connected to the second end 112 is approximately oblate, the circular cross section is not adapted to the oblate cross section, and there is a step structure at the connection position of the brush plate 12 and the second end 112, which not only results in a reduced connection area between the second end 112 and the brush plate 12, but also reduces connection stability, and the step structure has a sharp part, which not only presses against the mouth, but also is easy to prick the inner wall of the oral cavity of the user.

Since the location of the connection (i.e., the interface) of the second end 112 of the brush bar 11 to the brush plate 12 is not clear, it is specifically described herein: referring to fig. 3, the boundary between the second end 112 and the brush plate 12 may be the first boundary D passing through the vertex of the second curved edge 1323 and parallel to the width direction B-B in fig. 3, or may be the second boundary E located near the first end 111 and located at the first boundary D, where the second boundary E satisfies: the cross section perpendicular to the length extension direction L-L at which the second boundary line E is located is an oblate cross section, so that the cross section at the connection position of the second end 112 and the brush plate 12 is an oblate cross section.

Referring to fig. 7, in some embodiments, the brush plate 12 has a first thickness H1 along the thickness direction C-C, the first thickness H1 being 3mm or more and 4.5mm or less. Therefore, on the basis of ensuring that the brush plate 12 has enough strength and can stably bear the brush hair 13, the brush plate 12 is thinner and lighter, the material consumption of the brush plate 12 can be reduced, the weight of the brush plate 12 is lightened, and the extrusion of the oral mucosa of a user to a greater extent in the thickness direction C-C can be avoided.

When the first thickness H1 is less than 3mm, the thickness of the brush plate 12 is too thin and the strength is insufficient, and the brush plate 12 is easily deformed excessively to be broken during brushing, and thus the bristles 13 cannot be stably supported. When the first thickness H1 is greater than 4.5mm, the thickness of the brush plate 12 is too thick, the material and weight of the brush plate 12 are increased, resulting in increased material cost, easy occurrence of the light head and foot condition, resulting in reduced connection stability of the brush rod 11 and the connecting shaft 22, and the brush plate 12 having too thick thickness is easy to squeeze the inner wall of the user's mouth in the thickness direction C-C, resulting in enhanced foreign body sensation during brushing, and reduced comfort.

With continued reference to fig. 7, further, along the thickness direction C-C, the brush plate 12 and the bristles 13 have a second thickness H2, and a ratio of the second thickness H2 to the first thickness H1 is greater than or equal to 3.5 and less than or equal to 5. So, the thickness of brush board 12 is thinner, and the thickness of brush hair 13 is longer, and when brushing teeth, brush hair 13 can also be longer for brush board 12 wobbling length, can increase the swing range of brush hair 13, and then increase same brush hair 13 cleanable tooth surface area, and brush hair 13 is more liable to take place deformation, avoids powerful stimulus tooth and gum, has better care effect to tooth and gum.

When the ratio of the second thickness H2 to the first thickness H1 is less than 3.5, the thickness of the brush plate 12 is too thin and the strength is insufficient, and the brush plate 12 is easily deformed excessively to be broken during brushing, and thus the bristles 13 cannot be stably supported. And the length of the brush hair 13 is too long, deformation is easy to occur, and the free end of the brush hair 13 cannot be stably abutted against the tooth surface, so that the cleaning effect is reduced. When the ratio of the second thickness H2 to the first thickness H1 is greater than 5, the thickness of the brush plate 12 is too thick, the material and weight of the brush plate 12 are increased, so that the material cost is increased, the condition of heavy head and light foot is easy to occur, the connection stability of the brush rod 11 and the connecting shaft 22 is reduced, the brush plate 12 with too thick thickness is easy to squeeze the inner wall of the user oral cavity in the thickness direction C-C, the foreign body sensation is enhanced during brushing teeth, the comfort is reduced, the length of the brush hair 13 is too short, deformation is difficult to occur, the teeth and the gum are easy to be directly stimulated, and the teeth and the gum are damaged.

Referring to fig. 4 and 7, in some embodiments, the bristles 13 include a plurality of central filaments 134 (the central filaments 134 form bristle clusters 133 of smaller diameter in fig. 4) and a plurality of peripheral filaments 135 (the peripheral filaments 135 form bristle clusters 133 of larger diameter in fig. 4). A plurality of peripheral side brush filaments 135 are disposed around the central brush filaments 134. The plurality of middle brush wires 134 are located in the middle of the bristle planting surface 121, and as shown in fig. 7, the closer to the center of the bristle planting surface 121, the higher the height of the middle brush wires 134 is to the protrusion of the bristle planting surface 121, so that the middle brush wires 134 can clean tooth surfaces better, and the peripheral brush wires 135 and the middle brush wires 134 located at the edges and lower in height can form avoidance effects on the gums that may touch, so that the bristles 13 have better cleaning effects and gum protection effects at the same time.

Referring to fig. 4, further, the heights of the peripheral side brush filaments 135 relative to the bristle planting surface 121 are equal, so that the effect of avoiding the peripheral side brush filaments 135 from the gums is the same, and the situation that the peripheral side brush filaments 135 partially avoid the gums and partially squeeze the gums does not exist, particularly when the electric toothbrush head 10 moves laterally, the uneven peripheral side brush filaments 135 are more likely to damage the gums.

In some embodiments, at least the peripheral side brush filaments 135 are sharpened brush filaments. The sharpening wire brush wire is softer, does not hurt the gum, has a caring effect on the gum, is easier to penetrate into the gum groove, cleans deep dirt in the gum groove, and forms caring cleaning on the gum groove. It is understood that the middle bristles 134 may also be sharpened bristles.

Referring to fig. 7, in some embodiments, a first included angle α is formed between the length extending direction L-L of the brush rod 11 and the length direction A-A, as shown in fig. 7, when the length extending direction L-L is connected end to end with the length direction A-A, the first included angle α is greater than or equal to 160 degrees or less than or equal to 175 degrees, or, as it can be understood that when the length extending direction L-L and the length direction A-A have a common starting point, the first included angle α is greater than or equal to 5 degrees and less than or equal to 20 degrees, by limiting the angle of the first included angle α, the electric toothbrush head 10 is slightly tilted forward toward the teeth with respect to the brush rod 11 or slightly backward away from the teeth with respect to the brush rod 11, so that the bending angle of the wrist when the electric toothbrush handle 21 is held by a user can be reduced, and the wrist is only required to bend a smaller angle, so that the brush hair 13 is attached to the tooth surface, thereby improving the comfort of the user during brushing.

In the related art, the connection shaft 22 of the vibration motor is generally directly arranged to be inclined with respect to the brush holder 21 to achieve the effect of reducing the bending angle of the wrist, but in order to incline the connection shaft 22, on the one hand, a nonstandard motor is required or an adapter is required to be arranged on the connection shaft 22, and on the other hand, the inclined connection shaft 22 increases the size of the movement (the movement further includes a bracket, a battery, a circuit board, etc.) including the vibration motor, and a larger-sized brush holder 21 is required to accommodate the movement, which is disadvantageous for miniaturization of the brush holder 21. In this embodiment, the brush plate 12 is directly arranged to incline relative to the brush rod 11, so that the structure is simple, the connecting shaft 22 does not need to incline relative to the brush holder 21, the brush plate and the brush holder 21 can be arranged along the axial direction of the vibration motor together, a standard motor can be directly used, no adapter is needed, and a larger-sized brush holder 21 is not needed. The manufacturing cost is obviously reduced.

It will be appreciated that the electric toothbrush head 10 of the present utility model may be of at least two types, wherein the brush plate 12 of one electric toothbrush head 10 may be inclined with respect to the brush bar 11 to reduce the bending angle of the wrist; in another electric toothbrush head 10, the brush plate 12 is not inclined with respect to the brush bar 11, and both the brush plate 12 and the brush bar 11 extend in the axial direction of the vibration motor. The user can select one of the two types of electric toothbrush heads 10 to brush his teeth as desired, thereby meeting the user's different brushing needs.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. An electric toothbrush head, the electric toothbrush head comprising:

2. The powered toothbrush head of claim 1, wherein a product of the first width and the first length is 180mm or greater ² And less than or equal to 400mm ² 。

3. The powered toothbrush head of claim 1, wherein the outer contour of the bristle projection region comprises:

4. The powered toothbrush head as defined in claim 3, wherein the length of the first linear edge is no less than 6mm, the brush plate having a side surface that is connected to the bristle bearing surface and intersects a second linear edge that is parallel to and of equal length to the first linear edge, the side surface being planar or the height of the side surface that is arched in the width direction relative to the second linear edge being no more than 1mm.

5. The powered toothbrush head of claim 1, wherein a spacing between an outer contour of the bristle projection region and an outer contour of the bristle bearing surface is less than or equal to 2mm; and/or, the ratio of the area of the bristle projection area to the area of the bristle planting surface is greater than or equal to 80%.

6. The powered toothbrush head of claim 1, wherein the first end of the stem has a second width in the width direction, the ratio of the first width to the second width being greater than or equal to 0.8 and less than or equal to 1.2.

7. The electric toothbrush head according to claim 1, wherein the brush plate has a first thickness in the thickness direction, the first thickness being 3mm or more and 4.5mm or less.

8. The electric toothbrush head according to claim 7, wherein the brush plate and the bristles together have a second thickness in the thickness direction, and a ratio of the second thickness to the first thickness is 3.5 or more and 5 or less.

9. The electric toothbrush head according to claim 1, characterized in that a cross section of the brush plate perpendicular to the length extending direction gradually transitions from a circular shape to an oblate circular shape from the first end toward the second end of the brush rod, and the cross section of the junction of the second end and the brush plate is an oblate circular cross section having a width dimension in the width direction larger than a thickness dimension in the thickness direction.

10. The powered toothbrush head of claim 1, wherein the bristles comprise:

11. The powered toothbrush head of claim 10 wherein the peripheral bristles are of equal height relative to the bristle surface.

12. The powered toothbrush head of claim 1, wherein the bristles comprise:

13. The powered toothbrush head as defined in any one of claims 1-12, wherein the length extension direction of the brush bar has a first included angle with the length direction that is greater than or equal to 5 degrees and less than or equal to 20 degrees, or that is greater than or equal to 160 degrees or less than or equal to 175 degrees.

14. An electric toothbrush, comprising:

the powered toothbrush head of any of claims 1-13; and