Brush head with holes and electric toothbrush

Abstract

The invention provides a brush head with holes and an electric toothbrush. The brush head with the holes comprises a brush rod main body which comprises a brush rod head part, a neck part and a tail part which are connected in sequence, and the brush rod head part is provided with a plurality of through hair planting holes; the bristle bundles are inserted into the bristle planting holes one by one; the soft rubber body comprises a half-surrounding section and a sleeve section which are connected, the half-surrounding section is provided with a wrapping cavity for achieving half wrapping on the head of the brush rod, the sleeve section is provided with an axial channel for achieving wrapping on the neck, and the wrapping cavity is communicated with one end of the axial channel; wherein the neck part of the brush rod main body is provided with a through hole, and the through hole penetrates through the brush rod main body in the front-back direction of the brush rod main body. The through hole weakens the structural strength of the brush rod body near the through hole. By changing the structural shape of the brush rod main body instead of changing the material of the brush rod main body, even if the brush rod main body is made of a harder material, the brush rod main body can have better swinging and vibrating capabilities.

Description

Technical Field

[0001] The present application relates to the field of toothbrushes, and in particular to a brush head with holes and an electric toothbrush. Background Art

[0002] A vibrating electric toothbrush is a type of electric toothbrush. The brush head of a vibrating electric toothbrush can generate high-frequency vibrations thousands or even tens of thousands of times per minute. This high-frequency vibration can effectively clean dental plaque and food residues on the surface of teeth and between teeth.

[0003] Electric toothbrushes have brush heads, which are consumables of electric toothbrushes and need to be replaced every once in a while. The motor of an electric toothbrush drives the brush head to vibrate at a high frequency. The shape, volume, and material of the brush head are directly related to the specific vibration state of the end of the brush head, and thus are closely related to the vibration cleaning effect.

[0004] The neck surface of the brush head is generally closed and smooth, but when the material used for the brush head is limited, the vibration and swing characteristics of the brush head are limited by the inherent characteristics of the material, which may lead to the situation that the swing and vibration of the motor do not meet the requirements. Summary of the invention

[0005] This application is made in view of the above-mentioned state of the prior art. In a first aspect, the purpose of this application is to provide a brush head with holes.

[0006] The technical solution adopted in the present application includes: a brush head with holes, including: a brush rod main body, including a brush rod head, a neck, and a tail connected in sequence, the brush rod head having a plurality of through holes for planting hair; a plurality of bristle bundles, the plurality of bristle bundles being inserted into the bristle planting holes one by one; a soft colloid, the soft colloid including a connected semi-enclosed section and a sleeve section, the semi-enclosed section having a wrapping cavity for semi-wrapping the brush rod head, the sleeve section having an axial channel for wrapping the neck, the wrapping cavity being connected to one end of the axial channel; wherein the neck of the brush rod main body has a through hole, and the through hole penetrates the brush rod main body in the front-to-back direction of the brush rod main body.

[0007] As a further improvement of the present application, a dimension of the through hole along the longitudinal direction of the brush rod body is not less than a dimension of the through hole along the transverse direction of the brush rod body.

[0008] As a further improvement of the present application, the brush rod head, the neck and the tail of the brush rod body are formed as one piece, and the semi-enclosed section and the sleeve section of the soft colloid are formed as one piece; the material hardness of the soft colloid is less than the material hardness of the brush rod body; the inner wall of the sleeve section is protruded with an inner convex column, and the inner convex column is formed by melting the material forming the soft colloid and filling the through hole.

[0009] As a further improvement of the present application, the outer wall of the neck is raised with a raised platform, one end of the through hole is located at the top of the raised platform; the sleeve section has a through hole; the raised platform fills and is assembled into the through hole.

[0010] As a further improvement of the present application, the root cross-sectional profile of the inner convex column is waist-shaped, the cross-sectional profiles of the raised platform and the through hole are both waist-shaped, and the length direction of the waist-shaped inner convex column, the raised platform and the through hole is parallel to the longitudinal direction of the brush rod body.

[0011] As a further improvement of the present application, the top contour of the inner convex column is circular, and the side wall of the inner convex column is a conical surface; from the root to the top of the inner convex column, the cross-sectional area of ​​the inner convex column gradually decreases.

[0012] As a further improvement of the present application, the front side of the neck has a convex step, and one side of the convex step is integrally formed with the brush rod head; the soft colloid has a notch hole that passes through inside and outside, and one end of the notch hole is connected to the opening edge of the semi-enclosed section; the convex step fills and is assembled to the notch hole.

[0013] As a further improvement of the present application, the end of the sleeve segment facing away from the semi-enclosed segment has an end face of the sleeve segment, the junction of the neck and the tail of the brush rod body is provided with a step surface, and the end face and the step surface form a concave-convex matching surface contact; the projections of the end face and the step surface along the longitudinal direction of the brush rod body coincide with each other; the end face and the step surface are both non-rotational surfaces among the curved surfaces.

[0014] As a further improvement of the present application, a positioning cylinder is protruded from the front side of the brush rod head, and the inner wall of the positioning cylinder coincides with the inner wall of the hair implanting hole along the axial direction.

[0015] As a further improvement of the present application, a plurality of upright posts are protruded from the back of the brush rod head, and the plurality of upright posts are respectively arranged around the hair implanting holes.

[0016] As a further improvement of the present application, the first positioning point is located on the left and right sides of the soft colloid and at the junction of the semi-enclosed section and the sleeve section, the second positioning point is located on the outer wall of the soft colloid and at the position of the through hole closest to the semi-enclosed section; the third positioning point is located on the left and right sides of the soft colloid and at the junction with the end surface, the fourth positioning point is located on the outer wall of the soft colloid and at the position of the through hole farthest from the semi-enclosed section; the distance from the first positioning point to the second positioning point along the longitudinal direction of the brush rod body is between 6.0 mm and 7.0 mm; and / or the distance from the first positioning point to the second positioning point along the longitudinal direction of the brush rod body is between 3.0 mm and 4.0 mm.

[0017] In a second aspect, an electric toothbrush is provided, comprising the above-mentioned brush head with holes.

[0018] As a further improvement of the present application, a motor is included, and the motor drives the brush rod body to reciprocate and vibrate or swing in the left and right directions.

[0019] The beneficial effects of the perforated brush head and electric toothbrush of the present application include: a through hole is set in the neck of the brush rod body, which is equivalent to digging a hole in the middle of the brush rod body. First, compared with the conventional surface-sealed and closed brush head, the through hole is equivalent to digging out the material here, weakening the structural strength of the brush rod body near the through hole. By changing the structural shape of the brush rod body, rather than by changing the brush rod body material, even if a harder material is used to manufacture the brush rod body, the brush rod body can have better swing and vibration capabilities, and even a harder brush rod body material can show larger swing and vibration. Secondly, the penetration direction of the through hole is the front-to-back direction, which mainly reduces the bending strength of the neck of the brush rod body in the left-right direction, while the bending strength in the front-to-back direction does not change much. This is conducive to the left-right swing and vibration of the brush rod head of the brush rod body. The front-to-back direction of the brush rod body is directly related to the degree of fit with the teeth, so the front-to-back direction of the brush rod body should not be displaced too much, which is in line with the expected vibration direction of toothbrush cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is an exploded view of an embodiment of a brush head with holes of the present application;

[0022] Figure 2is an exploded view of an embodiment of a brush head with holes of the present application;

[0023] Figure 3 It is a front view of an embodiment of a brush head with holes of the present application;

[0024] Figure 4 yes Figure 3 AA section view;

[0025] Figure 5 It is a left view of an embodiment of a brush head with holes of the present application;

[0026] Figure 6 yes Figure 5 BB cross-sectional view;

[0027] Figure 7 It is a front view of a soft colloid of an embodiment of a brush head with holes of the present application;

[0028] Figure 8 It is a front view of a soft colloid of an embodiment of a brush head with holes of the present application;

[0029] Fig. 9 It is a three-dimensional diagram of a soft colloid of an embodiment of a perforated brush head of the present application.

[0030] Description of Reference Numerals

[0031] 1-brush rod body; 11-brush rod head; 111-planting hole; 112-positioning cylinder; 114-rib; 115-inner pit; 118-pillar rod; 12-neck; 121-through hole; 122-raised platform; 123-convex step; 13-tail; 14-step surface; 2-bristle bundle; 3-soft colloid; 31-semi-enclosed section; 311-wrapped cavity; 316-perforation; 32-sleeve section; 321-through hole; 324-end surface; 325-notch hole; 326-inner convex column; 3261-circular top surface; 3262-conical surface; 4-bottom plate; 41-flat plate; 42-protrusion; 43-recessed pit; 44-stop edge; L1-first distance; L2-second distance; L3-third distance; L4-fourth distance; X1-first left-right distance; Y1-first front-back distance; Z1-first longitudinal distance; J1-first straight-line distance; X2-second left-right distance; Y2-second front-back distance; Z2-second longitudinal distance; J2-second straight-line distance. DETAILED DESCRIPTION

[0032] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0033] See also Figure 1 and Figure 2 The embodiment of the present application provides a brush head with holes, which includes: a brush rod body 1, a bristle bundle 2 and a soft colloid 3. The brush rod body 1 includes a brush rod head 11, a neck 12, and a tail 13 connected in sequence. The brush rod head 11 has a plurality of through-going hair-planting holes 111; a plurality of bristle bundles 2 are inserted into the hair-planting holes 111 one by one. The soft colloid 3 includes a connected semi-enclosed section 31 and a sleeve section 32, the semi-enclosed section 31 has a wrapping cavity 311 for semi-enclosing the brush rod head 11, the sleeve section 32 has an axial channel 323 for wrapping the neck 12, and the wrapping cavity 311 is connected to one end of the axial channel 323.

[0034] The back, side, and part of the front of the brush rod head 11 are wrapped with a semi-enclosed section 31 of the soft colloid 3. The semi-enclosed section 31 realizes semi-enclosure of the brush rod head 11, enhances the resilience of the brush rod head 11, and improves the comfort in the user's mouth. Secondly, the sleeve section 32 of the soft colloid 3 is sleeved on the neck 12 of the brush rod body 1. Compared with some brush heads known to the inventor, they are two flat-shaped plastics that fit each other, and the fitting surface is almost a two-dimensional plane. The semi-enclosed section 31 of the soft colloid 3 is a semi-enclosed form, that is, the inner wall of the soft colloid 3 includes at least one inner wall bottom surface and a circle of inner wall side surfaces to fit with the brush rod head 11. The final fitting surface area can be larger, and the junction of the inner wall bottom surface and the inner wall side surface forms an angle, so the fitting surface is a three-dimensional surface, not a simple two-dimensional plane, which makes the entire soft colloid 3 and the brush rod body 1 firmly assembled, not easy to loosen or crack, thereby also reducing the probability of water ingress and mold here.

[0035] The neck 12 of the brush rod body 1 has a through hole 121, and the through hole 121 penetrates the brush rod body 1 in the front-to-back direction of the brush rod body 1. That is, the penetration direction of the through hole 121 coincides with the penetration direction of the hair implantation hole 111 on the same symmetrical longitudinal section of the brush rod body 1. The penetration direction of the through hole 121 is the front-to-back direction, which mainly reduces the bending strength of the neck 12 of the brush rod body 1 in the left-to-right direction, while the bending strength of the neck 12 of the brush rod body 1 in the front-to-back direction does not change much. This is conducive to the left-right vibration and swing of the brush rod head 11 of the brush rod body 1, which meets the action requirements of the toothbrush cleaning in the oral cavity.

[0036] In one embodiment, the dimension of the through hole 121 along the longitudinal direction of the brush rod body 1 is not less than the dimension of the through hole 121 along the transverse direction of the brush rod body 1 .

[0037] The beneficial effect of adopting the above embodiment is that the through hole 121 is not a simple round hole, and the shape of the through hole 121 is such that the lateral material of the neck 12 of the brush rod body 1 is not excessively dug out at the location of the through hole 121, but the through hole 121 is relatively large in the longitudinal direction of the brush rod body 1, which ensures that the structural characteristics of the neck 12 of the brush rod body 1 are conducive to its left and right vibration and swing, but not easy to break. During the vibration and swinging process of the brush rod body 1, the specific spatial shape of the through hole 121 will also change adaptively and periodically.

[0038] At the same time, the centroid of the cavity of the through hole 121 can be located on the longitudinal symmetrical section of the brush rod body 1 .

[0039] In one embodiment, the brush rod head 11, the neck 12, and the tail 13 of the brush rod body 1 are formed as one piece, and the semi-enclosed section 31 and the sleeve section 32 of the soft colloid 3 are formed as one piece; the hardness of the material of the soft colloid 3 is less than the hardness of the material of the brush rod body 1; the inner wall of the sleeve section 32 is protruded with an inner convex column 326. In one example, the inner convex column 326 is formed by melting the material forming the soft colloid 3 to fill the through hole 121.

[0040] The beneficial effect of adopting the above embodiment is that the relatively soft inner convex column 326 is melted, filled and solidified in the through hole 121. First, the assembly form of the inner convex column 326 and the through hole 121 shows that the two are in full surface contact and tightly bonded. Secondly, although the inner convex column 326 fills the through hole 121, because the inner convex column 326 is relatively soft, the structural weakening effect of the through hole 121 on the neck 12 of the brush rod body 1 still exists. At the same time, the inner convex column 326 fills the through hole 121, and also allows the outer wall of the neck 12 of the brush rod body 1 to maintain a smooth and closed shape, which is conducive to reducing sanitary dead corners.

[0041] The brush rod body 1 and the soft colloid body 3 can be made of plastic materials of different specifications.

[0042] In one embodiment, the outer wall of the neck 12 has a raised platform 122 , and one end of the through hole 121 is located at the top of the raised platform 122 ; the sleeve section 32 has a through hole 321 ; and the raised platform 122 fills and fits into the through hole 321 .

[0043] Here, the raised platform 122 may be formed on the back side of the neck 12 (the side opposite to the side where the bristles are located), thereby facilitating the vibration and swing of the bristle side.

[0044] The beneficial effects of adopting the above embodiment are: first, the raised platform 122 is equivalent to thickening the front-to-back thickness dimension of the neck 12, thereby improving the structural strength of the neck 12 against bending in the front-to-back direction; second, it is also equivalent to lengthening the axial length of the through hole 121 and the height of the inner boss 326, thereby increasing the contact area between the through hole 121 and the inner boss 326, thereby improving the assembly tightness of the two.

[0045] In one embodiment, the cross-sectional profile of the root of the inner convex column 326 is waist-shaped, wherein the waist-shaped refers to the same shape as the waist-shaped hole and the oblong hole, that is, the shape of two semicircular arcs with openings facing each other connected by two parallel and equal-length line segments. The cross-sectional profiles of the raised platform 122 and one end of the through hole 321 are all waist-shaped, and the length direction of the waist-shaped inner convex column 326, the raised platform 122, and the through hole 321 is parallel to the longitudinal direction of the brush rod body 1.

[0046] Due to the presence of the inner convex column 326, the size of the through hole 121 along the front-to-back direction of the brush rod body 1 is larger, which reduces the bending structural strength of the neck 12 of the brush rod body 1 along the left-right direction while maintaining the bending strength in the front-to-back direction, making the brush rod body 1 more suitable for the left-right swinging action requirements and in line with the cleaning action of the toothbrush in the oral cavity.

[0047] like Figure 2 , Figure 4 As shown, in one embodiment, the top profile of the inner convex column 326 is circular, that is, a circular top surface 3261. The side wall of the inner convex column 326 is a conical surface 3262; from the root to the top of the inner convex column 326, the cross-sectional area of ​​the inner convex column 326 gradually decreases.

[0048] The diameter of the circular top surface 3261 at the top of the inner convex column 326 can be equal to the width of the waist-shaped profile at the root of the inner convex column 326. In addition, the taper angle of the conical surface 3262 facing the semi-enclosed section 31 is smaller than the taper angle of the conical surface 3262 away from the semi-enclosed section 31. The inner convex column 326 with a thick root and a thin top facilitates the manufacture of the two different materials of the brush rod body 1 and the soft colloid 3 in a composite injection mold, and the shape of the inner convex column 326 facilitates demoulding.

[0049] like Figure 1 As shown, in one embodiment, the front side of the neck 12 has a convex step 123, and one side of the convex step 123 is integrally connected to the brush rod head 11; the soft colloid 3 has a notch hole 325 that passes through the inside and outside, and one end of the notch hole 325 is connected to the opening edge of the wrapping cavity 311; the convex step 123 fills and is assembled to the notch hole 325.

[0050] The root of the convex step 123 is formed integrally with the neck 12, and one side of the convex step 123 is formed integrally with the brush rod head 11. When viewed from the front of the brush rod body 1, the outline of the notch hole 325 is U-shaped.

[0051] The raised platform 122 and the convex step 123 are arranged one in front of the other, and play a role in strengthening the front and rear bending resistance of the neck 12 of the brush rod body 1. The vibration of the brush rod body 1 is reflected in the swing in the left and right directions as much as possible.

[0052] It should be noted that the inner convex column 326 fills and fits into the through hole 121, the raised platform 122 fills and fits into the through hole 321, and the convex step 123 fills and fits into the notch hole 325. The space occupied by the inner convex column 326 coincides with the cavity space surrounded by the through hole 121, the space occupied by the raised platform 122 coincides with the cavity space surrounded by the through hole 321, and the space occupied by the convex step 123 coincides with the cavity space surrounded by the notch hole 325. Finally, the top of the inner convex column 326 smoothly transitions with the end of the through hole 121, the top of the raised platform 122 smoothly transitions with the end of the through hole 321, and the top of the convex step 123 smoothly transitions with the end of the notch hole 325, and the smooth transition here can especially be flush or coplanar.

[0053] The inner boss 326 is filled and melted and solidified in the through hole 121. Since the inner boss 326 is softer than the brush rod body 1, the inner boss 326 is allowed to have a certain elastic deformation. The elastic deformation can absorb the impact force and vibration generated during the use of the toothbrush, thereby reducing stress concentration and enhancing the structural stability of the entire brush rod body 1.

[0054] Although the inner convex column 326 fills the through hole 121, the inner convex column 326 is soft and will not excessively weaken the structural integrity of the brush rod body 1. At the same time, the close fit between the inner convex column 326 and the through hole 121 reduces the possibility of moisture and other contaminants entering the through hole 121, thereby reducing the risk of internal corrosion of the brush rod body 1 and improving the durability of the product.

[0055] The shape design (such as waist-shaped profile) and material selection (softer) of the inner convex column 326 enable it to undergo adaptive deformation when subjected to external force. This deformation helps to disperse pressure and reduce the risk of damage caused by excessive local stress.

[0056] In one embodiment, the end of the sleeve section 32 away from the semi-enclosed section 31 has an end surface 324 of the sleeve section 32, and the junction of the neck 12 and the tail 13 of the brush rod body 1 is provided with a step surface 14, and the end surface 324 and the step surface 14 form a concave-convex matching surface contact; the projections of the end surface 324 and the step surface 14 along the longitudinal direction of the brush rod body 1 coincide with each other; the end surface 324 and the step surface 14 are both non-rotational curved surfaces.

[0057] The beneficial effects of the above embodiment are as follows: first, the end face 324 is completely connected with the step face 14, so that the outer wall of the soft colloid 3 and the outer wall of the middle tail portion 13 of the brush rod body 1 can achieve a smooth transition and maintain an aesthetic appearance. Second, the end face 324 and the step face 14 are both non-revolutionary curved surfaces, which can make the joint between the two have a higher structural stability and prevent the soft colloid 3 near this place from rotating on the brush rod body 1. Looseness in the form of.

[0058] like Figure 1As shown, the front of the brush rod head 11 has several positioning cylinders 112 protruding, and the inner wall of the positioning cylinder 112 coincides axially with the inner wall of the hair planting hole 111. Axial coincidence here means coincidence in axial observation or projection, that is, having the same radial size or position.

[0059] The beneficial effects of the above embodiment are as follows: the inner wall of the positioning cylinder 112 smoothly transitions with the inner wall of the hair planting hole 111, and the positioning cylinder 112 is equivalent to axially extending the inner wall of the hair planting hole 111. The positioning cylinder 112 facilitates the assembly operation and can guide the bristle bundle 2 to smoothly enter the hair planting hole 111; secondly, it increases the axial size of the hair planting hole 111 here, thereby improving the anti-lodging ability of the bristle bundle 2 here.

[0060] like Figure 2 , Figure 6 As shown, a plurality of upright posts 118 are protruded from the back of the brush rod head 11 , and the plurality of upright posts 118 are arranged around the plurality of hair planting holes 111 .

[0061] The number of pillar rods 118 is greater than the number of bristle-planting holes 111. The axial length and diameter of the pillar rod 118 are respectively smaller than the axial length and diameter of the bristle-planting holes 111. The portion of the brush rod head 11 between adjacent bristle-planting holes 111 constitutes the rib 114, and the pillar rod 118 protrudes integrally from the rib 114. During the assembly operation of the bristle bundle 2 and the brush rod head 11, the root of the bristle bundle 2 is fixedly combined with the pillar rod 118 by sintering and melting, and the molten bristle bundle 2 will diffuse, that is, by utilizing the enhanced molecular motion in the molten state, the root of the bristle bundle 2 loses its fixed shape and exhibits flow characteristics. The root of the bristle bundle 2 can diffuse radially outward along the bristle-planting holes 111, and then contact the pillar rod 118 or even partially surround the pillar rod 118. After the bristle bundle 2 is cooled and solidified, it is fully fixed to the pillar rod 118, so that the bristle bundle 2 has a stronger anti-loosening ability. Because the sintered and melted shape is unstable, it is not shown in the accompanying drawings. Figure 4 As shown, the bristle bundle 2 is also in a state where it has not yet been completely assembled with the hair implantation hole 111.

[0062] In a non-limiting example, the distance between two adjacent hair implantation holes 111 is between 0.9 mm and 1.1 mm.

[0063] In a non-limiting example, the diameter of the hair implantation hole 111 is between 1.5 mm and 4.0 mm.

[0064] In a non-limiting example, the distance between the positioning cylinder 112 and the adjacent hair implantation hole 111 is between 0.4 mm and 1.1 mm.

[0065] In a non-limiting example, the thickness of the positioning tube 112 (ie, the distance from the inner wall to the outer wall of the positioning tube 112 ) is between 0.4 mm and 0.6 mm, preferably 0.5 mm.

[0066] In one embodiment, a bottom plate 4 is further included. The bottom plate 4 is disposed between the back of the brush rod head 11 and the semi-enclosed section 31, and the semi-enclosed section 31 is transparent. A logo or pattern may be printed on one side of the bottom plate 4 facing the bottom surface of the wrapping cavity 311.

[0067] Compared with the opaque design, the transparent wrapping cavity 311 has the following purposes: first, from the lateral visual sense, it reduces the front and back thickness of the brush rod body 1, because the thinner brush rod body 1 can move more flexibly in the user's mouth, so it is more popular in the market. Second, from the perspective of looking from the back to the front, it is convenient for the eyes to directly see the bottom plate 4 through the wrapping cavity 311 of the soft gel 3, and the bottom plate 4 can be printed with aesthetic patterns or trademarks, etc., to enhance the recognition of the product. At the same time, the unique design and high-quality printing process can be regarded as the added value of the product, making consumers feel that they are getting value for money and building brand loyalty.

[0068] The bottom surface of the wrapping cavity 311 is penetrated by a through hole 316. The main body of the bottom plate 4 is a flat plate portion 41. A protrusion 42 is protruded from the surface of the bottom plate 4. The protrusion 42 may be located at the centroid of the flat plate portion 41. The protrusion 42 fills and fits into the through hole 316. At this time, strictly speaking, the wrapping cavity 311 has an opening in each of the front and rear directions. The rear opening area of ​​the wrapping cavity 311 may be smaller than the front opening area of ​​the wrapping cavity 311.

[0069] The beneficial effects of adopting the above embodiment are: the assembly of the protrusion 42 and the through hole 316 firstly increases the contact area between the base plate 4 and the soft colloid 3, thereby improving the connection tightness between the two; secondly, the base plate 4 and the soft colloid 3 are not simply in plane contact, but have surface contacts at multiple locations at different angles, thereby further improving the connection tightness between the base plate 4 and the soft colloid 3 in all directions.

[0070] The cross-sectional profile of the protrusion 42 and the opening profile of the through hole 316 may both be waist-shaped, and the length directions of the waist-shaped protrusion 42 and the through hole 316 are parallel to the longitudinal direction of the brush rod body 1 .

[0071] The waist shape in which the protrusion 42 and the through hole 316 coincide with each other is also adapted to the brush rod head 11 which is longer in the longitudinal direction.

[0072] It should be noted that the waist-shaped contours of the inner convex column 326, the through hole 121, the raised platform 122, the through hole 321, the protrusion 42, and the through hole 316 are, firstly, to adapt to the relatively long longitudinal dimension of the brush rod body 1; secondly, because of the rounded contour of the waist-shaped contour, there is no stress concentration point in the soft colloid 3, and the junction between the soft colloid 3 and the brush rod body 1 or the bottom plate 4 is not easy to crack, and the soft colloid 3 is not easy to tear during long-term use.

[0073] like Figure 7 As shown, there are two distances from the edge of the circular top surface 3261 at the top of the inner convex column 326 to the edge of the through hole 321, namely the first distance L1 and the second distance L2. The first distance L1 and the second distance L2 are both along the longitudinal direction of the brush rod body 1 and the soft colloid 3, wherein the first distance L1 refers to the straight-line distance from the edge of the circular top surface 3261 to the edge of the through hole 321 along the longitudinal direction of the soft colloid 3 and in the direction toward the brush rod head 11, and the preferred distance of the first distance L1 can be 3.27mm. The second distance L2 refers to the straight-line distance from the edge of the circular top surface 3261 to the edge of the through hole 321 along the longitudinal direction of the soft colloid 3 and in the direction toward the tail 13, and the preferred distance of the second distance L2 can be 6.57mm.

[0074] like Figure 8 As shown, the top and the root of the inner convex column 326 each have two sizes, namely the third distance L3 and the fourth distance L4. The distances of the third distance L3 and the fourth distance L4 are both along the longitudinal direction of the brush rod body 1 and the soft colloid 3, wherein the third distance L3 refers to the size of the top of the inner convex column 326 (i.e. the circular top surface 3261) along the longitudinal direction of the soft colloid 3, and the preferred size of the third distance L3 may be 1.76mm. The fourth distance L4 refers to the size of the root of the inner convex column 326 along the longitudinal direction of the soft colloid 3, and the preferred size of the fourth distance L4 may be 4.51mm.

[0075] like Fig. 9 As shown, Fig. 9 The size distance relationship between the through hole 321 and the soft colloid 3 is further optimized, which increases the elasticity of the soft colloid 3 and facilitates providing a stronger cleaning force. The position at the left and right sides of the soft colloid 3 and at the junction of the semi-enclosed section 31 and the sleeve section 32 is set as the first positioning point. The first positioning point can be the tangent junction of the concave surface and the convex surface. The outer wall of the soft colloid 3 and the position of the through hole 321 closest to the semi-enclosed section 31 are set as the second positioning point. The left and right sides of the soft colloid 3 and the position of the end face 324 are set as the third positioning point. The third positioning point can be the position of the end face 324 closest to the semi-enclosed section 31. The outer wall of the soft colloid 3 and the position of the through hole 321 farthest from the semi-enclosed section 31 are set as the fourth positioning point. The longitudinal distance from the third positioning point to the semi-enclosed section 31 can be less than the longitudinal distance from the fourth positioning point to the semi-enclosed section 31.

[0076] like Fig. 9 As shown, the straight-line distance from the first positioning point to the second positioning point is the first straight-line distance J1, the first straight-line distance J1 is between 8.0mm and 9.0mm, and the preferred distance of the first straight-line distance J1 may be 8.37mm. The distance from the first positioning point to the second positioning point in the left-right direction along the brush rod body 1 is the first left-right distance X1, the first left-right distance X1 is between 4.0mm and 5.0mm, and the preferred distance of the first left-right distance X1 may be 4.93mm. The distance from the first positioning point to the second positioning point in the front-to-back direction along the brush rod body 1 is the first front-to-back distance Y1, the first front-to-back distance Y1 is between 2.0mm and 3.0mm, and the preferred distance of the first front-to-back distance Y1 may be 2.8mm. The distance from the first positioning point to the second positioning point in the longitudinal direction along the brush rod body 1 is the first longitudinal distance Z1, the first longitudinal distance Z1 is between 6.0mm and 7.0mm, and the preferred distance of the first longitudinal distance Z1 may be 6.15mm.

[0077] The straight-line distance from the third positioning point to the fourth positioning point is the second straight-line distance J2, which is between 5.0 mm and 6.0 mm, and the preferred distance of the second straight-line distance J2 may be 5.61 mm. The distance from the third positioning point to the fourth positioning point in the left-right direction along the brush rod body 1 is the second left-right distance X2, which is between 3.0 mm and 4.0 mm, and the preferred distance of the second left-right distance X2 may be 3.51 mm. The distance from the first positioning point to the second positioning point in the front-to-back direction along the brush rod body 1 is the second front-to-back distance Y2, which is between 2.0 mm and 3.0 mm, and the preferred distance of the second front-to-back distance Y2 may be 2.93 mm. The distance from the first positioning point to the second positioning point in the longitudinal direction along the brush rod body 1 is the second longitudinal distance Z2, which is between 3.0 mm and 4.0 mm, and the preferred distance of the second longitudinal distance Z2 may be 3.25 mm.

[0078] like Figure 4 As shown, the surface of the bottom plate 4 has a concave pit 43 , and the concave pit 43 and the protrusion 42 are respectively located on the front and back sides of the bottom plate 4 ; along the depth direction of the concave pit 43 , the projection of the concave pit 43 is located inside the protrusion 42 .

[0079] The beneficial effects of adopting the above embodiment are: the recessed pit 43 and the protruding portion 42 extend in the same direction, which firstly reduces the material consumption of the base plate 4; secondly, the recessed pit 43 leaves a cavity, so that when the bristle bundle 2 is assembled with the brush rod head 11, there is a space for gas compression on the back of the brush rod head 11, thereby facilitating the smooth implantation of the bristle bundle 2 into the implanting hole 111. Otherwise, the gas in the implanting hole 111 may hinder the smooth implantation of the bristle bundle 2 due to the air pressure in the enclosed space.

[0080] The back side of the brush rod head 11 is provided with an inner recess 115 , and the edge of the bottom plate 4 is provided with a circle of stop edges 44 , and the stop edges 44 are assembled with the edges of the inner recess 115 .

[0081] The beneficial effect of adopting the above embodiment is that the stop edge 44 brings a right angle to the edge of the bottom plate 4, so that part of the bottom plate 4 can enter the inner pit 115, and part of the bottom plate 4 is located outside the inner pit 115, limiting the distance from the bottom plate to the bottom surface of the inner pit 115. Thus, space is reserved for the bristle bundle 2 in a molten state to be fully contacted and fixed with the pillar rod 118.

[0082] Figure 3 and Figure 5 They are the front view and side view of the finished product of the perforated brush head. In the finished product, the brush rod body 1 and the soft colloid 3 of the perforated brush head fit tightly.

[0083] On the other hand, the present application also provides an electric toothbrush, which adopts the above-mentioned perforated brush head.

[0084] The electric toothbrush may be a vibrating electric toothbrush, which includes a motor that drives the brush rod body 1 to reciprocate or swing in the left-right direction.

[0085] like Figure 4 , Figure 6 As shown, the end of the brush rod body 1 facing the motor is provided with a blind hole, and the motor is directly or indirectly assembled with the blind hole.

[0086] The above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people familiar with this technology to understand the content of the present application and implement it. They cannot be used to limit the scope of protection of the present application. All equivalent changes or modifications made according to the spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A brush head with holes, characterized in that: include: The brush rod body (1) comprises a brush rod head (11), a neck (12), and a tail (13) which are connected in sequence, wherein the brush rod head (11) has a plurality of through-going hair planting holes (111); A plurality of bristle bundles (2), wherein the plurality of bristle bundles (2) are inserted one by one into the bristle implantation holes (111); A soft colloid (3), the soft colloid (3) comprising a connected semi-enclosed section (31) and a sleeve section (32), the semi-enclosed section (31) having a wrapping cavity (311) for semi-enclosing the brush rod head (11), the sleeve section (32) having an axial channel (323) for wrapping the neck (12), the wrapping cavity (311) being in communication with one end of the axial channel (323); The neck portion (12) of the brush rod body (1) is provided with a through hole (121), and the through hole (121) penetrates the brush rod body (1) in the front-rear direction of the brush rod body (1).

2. The perforated brush head according to claim 1, characterized in that: The dimension of the through hole (121) along the longitudinal direction of the brush rod body (1) is not less than the dimension of the through hole (121) along the transverse direction of the brush rod body (1).

3. The perforated brush head according to claim 1, characterized in that: The brush rod head (11), the neck (12) and the tail (13) of the brush rod body (1) are formed in one piece, and the semi-enclosed section (31) and the sleeve section (32) of the soft colloid (3) are formed in one piece; The material hardness of the soft colloid (3) is less than the material hardness of the brush rod body (1); An inner convex column (326) is protruded from the inner wall of the sleeve section (32), and the inner convex column (326) is formed by melting the material forming the soft colloid (3) and filling the through hole (121).

4. The perforated brush head according to claim 3, characterized in that: The outer wall of the neck (12) is protruded with a raised platform (122), and one end of the through hole (121) is located at the top of the raised platform (122); The sleeve section (32) is provided with a through hole (321); the raised platform (122) fills and is assembled into the through hole (321).

5. The perforated brush head according to claim 4, characterized in that: The cross-sectional profile of the root of the inner convex column (326) is waist-shaped, and the cross-sectional profiles of the raised platform (122) and the through hole (321) are both waist-shaped, and the length direction of the waist-shaped inner convex column (326), the raised platform (122), and the through hole (321) is parallel to the longitudinal direction of the brush rod body (1).

6. The perforated brush head according to claim 3, characterized in that: The top profile of the inner convex column (326) is circular, and the side wall of the inner convex column (326) is a conical surface (3262); from the root to the top of the inner convex column (326), the cross-sectional area of ​​the inner convex column (326) gradually decreases.

7. The perforated brush head according to claim 1, characterized in that: The front side of the neck (12) is provided with a convex step (123), and one side of the convex step (123) is formed integrally with the brush rod head (11); the soft colloid (3) is provided with a notch hole (325) that passes through inside and outside, and one end of the notch hole (325) is connected to the opening edge of the semi-enclosed section (31); the convex step (123) fills and is assembled into the notch hole (325).

8. The perforated brush head according to claim 1, characterized in that: The end of the sleeve section (32) facing away from the semi-enclosed section (31) has an end face (324) of the sleeve section (32); the junction between the neck (12) and the tail (13) of the brush rod body (1) is provided with a step face (14); the end face (324) and the step face (14) form a concave-convex matching surface contact; The projections of the end surface (324) and the step surface (14) along the longitudinal direction of the brush rod body (1) overlap with each other; The end face (324) and the step face (14) are both non-revolutionary curved surfaces.

9. The perforated brush head according to claim 1, characterized in that: A positioning cylinder (112) is protruded on the front side of the brush rod head (11), and the inner wall of the positioning cylinder (112) overlaps with the inner wall of the hair implantation hole (111) along the axial direction.

10. The perforated brush head according to claim 1, characterized in that: A plurality of upright posts (118) are protruded from the back of the brush rod head (11), and the plurality of upright posts (118) are respectively arranged around the hair planting holes (111).

11. The perforated brush head according to claim 3, characterized in that: The first positioning point is located on the left and right sides of the soft colloid (3) and at the junction of the semi-enclosed section (31) and the sleeve section (32), and the second positioning point is located on the outer wall of the soft colloid (3) and at the position where the through hole (321) is closest to the semi-enclosed section (31); The third positioning point is located on the left and right sides of the soft colloid (3) and at the junction with the end surface (324), and the fourth positioning point is located on the outer wall of the soft colloid (3) and at the position of the through hole (321) farthest from the semi-enclosed section (31); The distance between the first positioning point and the second positioning point in the longitudinal direction of the brush rod body (1) is between 6.0 mm and 7.0 mm; and / or The distance between the first positioning point and the second positioning point along the longitudinal direction of the brush rod body (1) is between 3.0 mm and 4.0 mm.

12. An electric toothbrush, characterized in that: The invention comprises the brush head with holes as claimed in any one of claims 1 to 11.

13. The electric toothbrush according to claim 12, characterized in that: include: A motor drives the brush rod body (1) to reciprocate or swing in left and right directions.

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