Toothbrush head for electric toothbrush and electric toothbrush

Abstract

Provided are a toothbrush head (300) for an electric toothbrush and an electric toothbrush. The toothbrush head (300) comprises: a brush head body (310) provided with a rotating shaft along a longitudinal axis thereof and a circumferential surface that is not always equidistant to the rotating shaft, wherein a first end of the brush head body (310) is provided with a first rotating fixation structure configured for the mounting of the brush head body (310); and bristles (321, 322) arranged on the circumferential surface, including first bristles (321) having a first hardness and second bristles (322) having a second hardness greater than the first hardness, wherein the distance from the circumferential surface where the first bristles (321) are arranged to the rotating shaft is less than the distance from the circumferential surface where the second bristles (322) are arranged to the rotating shaft, and the distance from free ends of the first bristles (321) to the rotating shaft is greater than the distance from free ends of the second bristles (322) to the rotating shaft.

Description

Toothbrush head for electric toothbrush and electric toothbrush Technical Field

[0001] The present disclosure relates to oral care devices, and more particularly, to a toothbrush head for an electric toothbrush and an electric toothbrush including the toothbrush head for an electric toothbrush. Background Art

[0002] As people's quality of life improves, their attention to their own health is gradually increasing. Oral health, as one of the important indicators, not only affects the quality of life, but is also closely related to physical health. Therefore, it has also attracted people's attention. Teeth cleaning is an important basis for ensuring oral health.

[0003] In order to better clean teeth, people have developed various cleaning devices to assist in cleaning the oral cavity, and electric toothbrushes are one of them. Existing electric toothbrushes mainly include sonic vibration types, but existing electric toothbrushes basically only focus on cleaning the surface of the teeth and do not perform targeted cleaning on different stains.

[0004] Summary of the Invention

[0005] In response to the technical problem mentioned in the background technology, that is, the existing electric toothbrushes use the same cleaning method for different types of stains, the inventors of the present disclosure innovatively thought of using bristles of different hardness and hardness with a rotation method, so that different cleaning methods can be used for different stains, thereby solving the above technical problems.

[0006] Specifically, a first aspect of the present disclosure provides a toothbrush head for an electric toothbrush, the toothbrush head comprising:

[0007] A brush head body having a rotation axis along its longitudinal axis and a circumferential surface thereof having a unequal distance from the rotation axis, wherein a first rotation fixing structure for mounting the brush head body is provided on a first end of the brush head body; and

[0008] Bristles are arranged on the circumferential surface and include first bristles having a first hardness and second bristles having a second hardness greater than the first hardness, wherein the distance between the circumferential surface on which the first bristles are arranged and the rotation axis is smaller than the distance between the circumferential surface on which the second bristles are arranged and the rotation axis, and wherein the distance between the free end of the first bristles and the rotation axis is greater than the distance between the free end of the second bristles and the rotation axis.

[0009] The toothbrush head proposed in accordance with the present disclosure firstly employs two types of bristles of different hardness, namely, first bristles having a first hardness and second bristles having a second hardness greater than the first hardness. This allows different bristles to be used for common stains on the tooth surface and between teeth, as well as stubborn stains (e.g., mild tartar), thereby enabling more comprehensive cleaning. In addition, since the second bristles of the second hardness are shorter than the first bristles, the bristles of higher hardness can be made shorter, thereby better maintaining their hardness and, in turn, better cleaning stubborn stains.

[0010] In one embodiment of the present disclosure, the brush head body further includes a liquid supply port on the first end for accommodating a liquid spray tube. Preferably, in one embodiment of the present disclosure, the brush head body includes a liquid outlet in the area where the second bristles are located, the liquid outlet being in fluid communication with the liquid spray tube. In this manner, in addition to brushing teeth, tooth cleaning liquid can also be supplied to the toothbrush head through the liquid supply port, thereby enabling subsequent ejection of the tooth cleaning liquid, thereby enabling the toothbrush head according to the present disclosure to be used for both brushing and rinsing.

[0011] In one embodiment of the present disclosure, the first rotational fixing structure has a fixing hole on the first end. Those skilled in the art will appreciate that the fixing hole is only one possible implementation, and other structures capable of achieving fixing are included within the scope of protection of the toothbrush head according to the present disclosure.

[0012] Preferably, in an embodiment according to the present disclosure, the number of the fixing holes is three and / or the cross-section of the fixing holes is triangular or circular.

[0013] Preferably, in one embodiment according to the present disclosure, the first bristles and the second bristles are spaced apart along the circumferential surface. More preferably, in one embodiment according to the present disclosure, the bristles are arranged on the entire circumferential surface of the brush head body.

[0014] Alternatively, in one embodiment of the present disclosure, the bristles are arranged in an elongated area along the longitudinal axis of the circumferential surface, and the width of the elongated area is less than half of the circumferential length of the circumferential surface. Preferably or additionally, in one embodiment of the present disclosure, a soft rubber pad is arranged in an area of ​​the circumferential surface other than the elongated area.

[0015] Optionally, in one embodiment of the present disclosure, the cross-section of the brush head body is trapezoidal. Alternatively or preferably, in one embodiment of the present disclosure, the cross-section of the brush head body is a non-regular hexagon. More preferably, in one embodiment of the present disclosure, the two alternate sides of the non-regular hexagon are equal in length, and the six angles of the non-regular hexagon are all 60 degrees.

[0016] Preferably, in one embodiment according to the present disclosure, the liquid supply port is symmetrical about the center of the rotation axis.

[0017] In addition, a second aspect of the present disclosure provides an electric toothbrush, comprising:

[0018] A housing, wherein the housing forms a receiving cavity and has a brush head end for mounting a toothbrush head;

[0019] a toothbrush head, the toothbrush head being configured as the toothbrush head for an electric toothbrush proposed in the first aspect of the present disclosure and being mounted to the brush head end;

[0020] a first driving unit, the first driving unit being disposed in the housing and drivingly connected to the toothbrush head to drive the toothbrush head to rotate;

[0021] a liquid storage cavity, the liquid storage cavity being arranged in the accommodating cavity and being used for accommodating the tooth cleaning liquid;

[0022] a liquid spray pipe, wherein both ends of the liquid spray pipe are respectively in fluid communication with the liquid storage chamber and the liquid outlet; and

[0023] A second driving unit is provided in the housing and is used for driving the tooth cleaning liquid in the liquid storage chamber to flow out from the liquid outlet through the liquid spraying tube.

[0024] Preferably, in one embodiment of the present disclosure, the electric toothbrush further comprises: a control circuit configured to control the first drive unit and the second drive unit; and a secondary battery disposed in the accommodating chamber and electrically connected to the control circuit and the first motor. More preferably, in one embodiment of the present disclosure, the electric toothbrush further comprises a protective plate having a pin portion and a clamping portion, and the toothbrush head is provided with a accommodating hole at an end thereof away from the housing, and the protective plate is fixed to the housing via the pin portion and the clamping portion.

[0025] Preferably, in one embodiment according to the present disclosure, the second driving unit includes a second motor and a first piston arranged in the liquid storage chamber, the second motor is connected to the first piston, and the second motor drives the first piston to move to squeeze the liquid in the liquid storage chamber.

[0026] Alternatively, in one embodiment according to the present disclosure, the second drive unit includes a control coil and a second piston, the second piston includes a piston head located in the liquid storage chamber and a magnetic component located in the control coil, the piston head and the magnetic component are connected, and the power-on state of the control coil is controlled according to the position of the toothbrush head driven by the first drive unit to rotate, so as to form a magnetic field to control the movement of the second piston to squeeze the liquid in the liquid storage chamber.

[0027] Alternatively, in one embodiment according to the present disclosure, the pressing block and the pressing cover, the first driving unit is constructed as a first driving shaft with a hollow structure and a second driving shaft with a hollow structure, the first driving shaft is driven and connected to the toothbrush head, the pressing block is driven and installed on the second driving shaft, the pressing cover is provided with a through hole, the spray pipe includes a first spray pipe and a second spray pipe, the first spray pipe and the second spray pipe are connected, the first spray pipe is arranged in the hollow structure of the first driving shaft and the second driving shaft and the first spray pipe extends into the through hole toward one end of the pressing block, the second spray pipe is arranged in the liquid storage chamber, the pressing cover is slidably installed on one end of the second spray pipe close to the second driving shaft, the first driving unit drives the pressing block to push the pressing cover to slide back and forth in the second spray pipe to form a low-pressure area in the second spray pipe, so that the liquid in the liquid storage chamber passes through the two spray pipes and the first spray pipe in turn and flows out from the liquid outlet.

[0028] Preferably, in one embodiment according to the present disclosure, the second drive unit further includes an elastic member, the end of the second liquid spray pipe close to the second drive shaft is located outside the liquid storage chamber, and a step is provided inside the end of the second liquid spray pipe close to the second drive shaft, the inner diameter of the second liquid spray pipe close to the second drive shaft is larger than the inner diameter of the second liquid spray pipe away from the second drive shaft, and the elastic member is provided in the sliding tube and sandwiched between the baffle and the step surface in the second liquid spray pipe.

[0029] Preferably, in one embodiment according to the present disclosure, the second drive shaft is constructed as a reciprocating screw, a guide rod is provided on the shell, a slot matching the guide rod is provided on the pressure block, the pressure block is threadedly connected to the second drive shaft and the guide rod is located in the slot, and when the first drive unit drives the second drive shaft to rotate, the guide rod enables the pressure block to rotate relative to the second drive rod and reciprocate along the second drive rod, thereby pushing the sliding tube to slide in the second liquid spraying tube.

[0030] Preferably, in one embodiment according to the present disclosure, the electric toothbrush further comprises a heating coil, and the heating coil is disposed at the liquid spray pipe.

[0031] In summary, the toothbrush head and the corresponding electric toothbrush proposed in accordance with the present disclosure firstly use two bristles of different hardness, namely, first bristles having a first hardness and second bristles having a second hardness greater than the first hardness, so that different bristles can be used to target common stains on the tooth surface and in the gaps between teeth, as well as stubborn stains (such as mild tartar), thereby achieving more comprehensive cleaning. In addition, because the second bristles of the second hardness are shorter than the first bristles, the bristles of higher hardness can be made shorter, thereby better maintaining their hardness and thus better cleaning stubborn stains. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The features, advantages and other aspects of the embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings, in which several embodiments of the present invention are shown by way of example and not limitation. In the accompanying drawings:

[0033] FIG1 shows a schematic diagram of a toothbrush head 100 for an electric toothbrush according to one embodiment of the present disclosure;

[0034] FIG2 shows a schematic diagram of a toothbrush head 200 for an electric toothbrush according to another embodiment of the present disclosure;

[0035] FIG3A shows a schematic diagram of a toothbrush head 300 for an electric toothbrush according to yet another embodiment of the present disclosure;

[0036] FIG3B shows a schematic diagram of the brush head body 310 of the toothbrush head 300 according to FIG3A ;

[0037] FIG4A shows a schematic diagram of a toothbrush head body according to another embodiment of the present disclosure;

[0038] FIG4B shows a schematic diagram of a toothbrush head body according to another embodiment of the present disclosure;

[0039] FIG5 shows a schematic diagram of a first driving unit 500 according to an embodiment of the present disclosure;

[0040] FIG6 shows a schematic diagram of a second drive unit and a liquid storage chamber according to an embodiment of the present disclosure;

[0041] FIG7A shows a schematic diagram of a second driving unit according to an embodiment of the present disclosure;

[0042] FIG7B shows a schematic diagram of a second driving unit according to another embodiment of the present disclosure;

[0043] FIG7C shows a schematic diagram of a second driving unit according to yet another embodiment of the present disclosure;

[0044] FIG8 shows a schematic structural diagram of a battery according to the present disclosure;

[0045] FIG9A shows a schematic diagram of a protection plate according to one embodiment of the present disclosure;

[0046] FIG9B shows a schematic diagram of a protection plate according to another embodiment of the present disclosure;

[0047] FIG9C shows a schematic diagram of a protection plate according to yet another embodiment of the present disclosure;

[0048] FIG9D shows a schematic diagram of a protection plate according to yet another embodiment of the present disclosure;

[0049] FIG10 shows a schematic diagram of the inlet of the liquid storage chamber according to one embodiment of the present disclosure;

[0050] FIG11 shows a schematic diagram of a housing according to one embodiment of the present disclosure; and

[0051] FIG12 shows a schematic diagram of an electric toothbrush according to one embodiment of the present disclosure. DETAILED DESCRIPTION

[0052] The various exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings. Although the exemplary methods and devices described below include software and / or firmware executed on hardware among other components, it should be noted that these examples are merely illustrative and should not be regarded as restrictive. For example, it is contemplated that any or all hardware, software, and firmware components may be implemented exclusively in hardware, exclusively in software, or in any combination of hardware and software. Therefore, although exemplary methods and devices have been described below, it should be readily understood by those skilled in the art that the examples provided are not intended to limit the manner in which these methods and devices are implemented.

[0053] In addition, the flowcharts and block diagrams in the accompanying drawings illustrate possible architectures, functions, and operations of the methods and systems according to various embodiments of the present invention. It should be noted that the functions marked in the boxes may also occur in an order different from that marked in the accompanying drawings. For example, two boxes shown in succession may actually be executed substantially in parallel, or they may sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the flowchart and / or block diagram, and the combination of boxes in the flowchart and / or block diagram, may be implemented using a dedicated hardware-based system that performs the specified functions or operations, or may be implemented using a combination of dedicated hardware and computer instructions.

[0054] The terms "including," "comprising," and similar terms used in this disclosure are open-ended, meaning "including but not limited to," indicating that other contents may also be included. The term "based on" means "based, at least in part, on." The term "one embodiment" means "at least one embodiment," and the term "another embodiment" means "at least one additional embodiment," etc.

[0055] As mentioned above, in the prior art, in response to the technical problem mentioned in the background technology, that is, the existing electric toothbrushes use the same cleaning method for different types of stains, the inventors of the present disclosure innovatively thought of using bristles of different hardness and hardness assisted by a rotation method, so that different cleaning methods can be used for different stains, thereby solving the above technical problems.

[0056] In summary, the present disclosure provides a toothbrush head for an electric toothbrush, the toothbrush head comprising: a brush head body, the brush head body having a rotation axis along its longitudinal axis and the distance of its circumferential surface from the rotation axis is not always equal, wherein a first rotation fixing structure for mounting the brush head body is provided on the first end of the brush head body; and bristles, the bristles being arranged on the circumferential surface and comprising first bristles having a first hardness and second bristles having a second hardness greater than the first hardness, wherein the distance of the circumferential surface on which the first bristles are arranged from the rotation axis is less than the distance of the circumferential surface on which the second bristles are arranged from the rotation axis, and wherein the distance of the free end of the first bristles from the rotation axis is greater than the distance of the free end of the second bristles from the rotation axis. The toothbrush head proposed in accordance with the present disclosure firstly employs two types of bristles of different hardness, namely, first bristles having a first hardness and second bristles having a second hardness greater than the first hardness. This allows different bristles to be used for common stains on the tooth surface and between teeth, as well as stubborn stains (e.g., mild tartar), thereby enabling more comprehensive cleaning. In addition, since the second bristles of the second hardness are shorter than the first bristles, the bristles of higher hardness can be made shorter, thereby better maintaining their hardness and, in turn, better cleaning stubborn stains.

[0057] A toothbrush head for an electric toothbrush according to the present disclosure will be described below with reference to Figures 1 to 4B. Figure 1 shows a schematic diagram of a toothbrush head 100 for an electric toothbrush according to one embodiment of the present disclosure, Figure 2 shows a schematic diagram of a toothbrush head 200 for an electric toothbrush according to another embodiment of the present disclosure, Figure 3A shows a schematic diagram of a toothbrush head 300 for an electric toothbrush according to yet another embodiment of the present disclosure, Figure 3B shows a schematic diagram of a head body 310 of the toothbrush head 300 according to Figure 3A, Figure 4A shows a schematic diagram of a head body of a toothbrush head according to another embodiment of the present disclosure, and Figure 4B shows a schematic diagram of a head body of a toothbrush head according to yet another embodiment of the present disclosure.

[0058] As can be seen from Figure 1, the toothbrush head 100 for an electric toothbrush provided in accordance with the present disclosure includes a brush head body 110 and bristles 121 and 122. The brush head body 110 has a rotation axis along its longitudinal axis (e.g., a longitudinal axis passing through the center hole 113) and the distances of its circumferential surfaces from the rotation axis are not always equal. Here, the distance (e.g., the shortest distance or average distance) from the surface on which the short bristles 122 are arranged to the longitudinal axis is greater than the distance (e.g., the shortest distance or average distance) from the surface on which the long bristles 121 are arranged to the longitudinal axis. This ensures that the hardness or stiffness of the soft bristles is better maintained, thereby ensuring that stubborn stains on the tooth surface can be effectively cleaned or removed. A first rotation fixing structure 112 for mounting the brush head body 110 is provided on the first end (e.g., the end facing the paper). In addition, the bristles 121 and 122 are arranged on the circumferential surface and include first bristles 121 having a first hardness and second bristles 122 having a second hardness greater than the first hardness. Here, the distance between the circumferential surface on which the first bristles 121 are arranged and the rotating axis is smaller than the distance between the circumferential surface on which the second bristles 122 are arranged and the rotating axis. In addition, the distance between the free end of the first bristle 121 and the rotating axis is greater than the distance between the free end of the second bristle 122 and the rotating axis. In the toothbrush head proposed in accordance with the contents of the present disclosure, two types of bristles with different hardness are firstly adopted, namely, first bristles 121 having a first hardness and second bristles 122 having a second hardness greater than the first hardness, so that different bristles can be used for common stains on the tooth surface and in the gaps between teeth and stubborn stains (such as mild tartar), thereby making cleaning more comprehensive. In addition, since the second bristles 122 of the second hardness are shorter than the first bristles 121, the bristles with higher hardness can be made shorter, so that their hardness can be better maintained, and thus stubborn stains can be better cleaned. Preferably, the brush head body 110 is also provided with a liquid supply port 113 on the first end for accommodating a liquid spray pipe. Here, the liquid supply port 113 is symmetrical about the center of the rotation axis, so that the non-rotating liquid spray pipe can be accommodated in the liquid supply port 113. In addition, preferably, the bristles 121 and 122 are arranged in the long strip area along the longitudinal axis of the circumferential surface, and more preferably, the width of the long strip area is less than half of the circumferential length of the circumferential surface. Preferably or additionally, the area of ​​the circumferential surface other than the long strip area is arranged with a soft rubber pad 111.

[0059] As can be seen from Figure 2, the toothbrush head 200 for an electric toothbrush provided in accordance with the present disclosure includes a brush head body 210 and bristles 221 and 222. The brush head body 210 has a rotation axis along its longitudinal axis (e.g., a longitudinal axis passing through a center hole 213), and the distances of its circumferential surfaces from the rotation axis are not always equal. Here, the distance (e.g., the shortest distance or average distance) from the longitudinal axis to the surface 214 on which the short bristles 222 are disposed is greater than the distance (e.g., the shortest distance or average distance) from the longitudinal axis to the surface 215 on which the long bristles 221 are disposed. This ensures that the hardness or rigidity of the soft bristles is better maintained, thereby ensuring that stubborn stains on the tooth surface can be effectively cleaned or removed. A first rotation fixing structure 212 for mounting the brush head body 210 is provided on the first end (e.g., the end facing the paper). In addition, the bristles 221 and 222 are arranged on the circumferential surface and include first bristles 221 having a first hardness and second bristles 222 having a second hardness greater than the first hardness. Here, the distance between the circumferential surface on which the first bristles 221 are arranged and the rotation axis is smaller than the distance between the circumferential surface on which the second bristles 222 are arranged and the rotation axis. In addition, the distance between the free end of the first bristle 221 and the rotation axis is greater than the distance between the free end of the second bristle 222 and the rotation axis. In the toothbrush head proposed in accordance with the contents of the present disclosure, two types of bristles with different hardness are firstly adopted, namely, first bristles 221 having a first hardness and second bristles 222 having a second hardness greater than the first hardness, so that different bristles can be used for common stains on the tooth surface and in the gaps between teeth and stubborn stains (such as mild tartar), thereby making cleaning more comprehensive. In addition, since the second bristles 222 of the second hardness are shorter than the first bristles 221, the bristles with higher hardness can be made shorter, so that their hardness can be better maintained, and thus stubborn stains can be better cleaned. Preferably, the brush head body 210 is also provided with a liquid supply port 213 for accommodating a liquid spray pipe on the first end. Here, the liquid supply port 213 is symmetrical about the center of the rotation axis, so that the non-rotating liquid spray pipe can be accommodated in the liquid supply port 213. In addition, preferably, the bristles 221 and 222 are arranged in the long strip area along the longitudinal axis of the circumferential surface, and more preferably, the width of the long strip area is less than half of the circumferential length of the circumferential surface. Preferably or additionally, a soft rubber pad 211 is arranged on the area of ​​the circumferential surface other than the long strip area. Compared with the toothbrush head shown in Figure 1, the bristles in Figure 2 are more concentrated, so that the bristles are more directional, that is, facing a relatively fixed direction.In summary, the bristles 221 and 222 are arranged in a strip region of the circumferential surface along the longitudinal axis, and the width of the strip region is less than half of the circumferential length of the circumferential surface. Preferably or additionally, in one embodiment of the present disclosure, a soft rubber pad 211 is arranged in an area of ​​the circumferential surface other than the strip region.

[0060] As can be seen from Figure 3A, the toothbrush head 300 for an electric toothbrush provided in accordance with the present disclosure includes a brush head body 310 and bristles 321 and 322. The brush head body 310 has a rotation axis along its longitudinal axis (e.g., a longitudinal axis passing through a center hole) and the distances of its circumferential surfaces from the rotation axis are not always equal. Here, the distance (e.g., the shortest distance or average distance) from the longitudinal axis to the surface on which the short bristles 322 are arranged is greater than the distance (e.g., the shortest distance or average distance) from the longitudinal axis to the surface on which the long bristles 321 are arranged. This ensures that the hardness or stiffness of the soft bristles is better maintained, thereby ensuring that stubborn stains on the tooth surface can be effectively cleaned or removed. A first rotation fixing structure (e.g., a triangular hole position) for mounting the brush head body 310 is provided on the first end (e.g., the end facing the paper). In addition, the bristles 321 and 322 are arranged on the circumferential surface and include first bristles 321 having a first hardness and second bristles 322 having a second hardness greater than the first hardness. Here, the distance between the circumferential surface on which the first bristles 321 are arranged and the rotation axis is smaller than the distance between the circumferential surface on which the second bristles 322 are arranged and the rotation axis. In addition, the distance between the free end of the first bristle 321 and the rotation axis is greater than the distance between the free end of the second bristle 322 and the rotation axis. In the toothbrush head proposed in accordance with the contents of the present disclosure, two types of bristles with different hardness are firstly adopted, namely, first bristles 321 having a first hardness and second bristles 322 having a second hardness greater than the first hardness, so that different bristles can be used for common stains on the tooth surface and in the gaps between teeth and stubborn stains (such as mild tartar), thereby making cleaning more comprehensive. Furthermore, since the second bristles 322 of the second hardness are shorter than the first bristles 321, the harder bristles can be made shorter, thereby better maintaining their hardness and, in turn, better cleaning stubborn stains. Preferably, the brush head body 310 further includes a liquid supply port at the first end for accommodating a liquid spray tube. The liquid supply port is symmetrical about the center of the rotation axis, thereby facilitating the accommodation of the non-rotating liquid spray tube within the liquid supply port.

[0061] In addition, existing electric toothbrushes are basically unable to be flushed with water, and the brushing function is separated from the irrigating function. A comprehensive teeth cleaning requires the use of two products, an electric toothbrush and an irrigator. The toothbrush head proposed in the present disclosure is a rotary electric toothbrush with an interdental rinsing function. It rinses the residues between the teeth while brushing the teeth, has a strong decontamination ability, and cleans quickly. In order to solve this problem, preferably, the brush head body 310 has a liquid outlet 323 in the area where the second bristles 322 are provided, and the liquid outlet 323 is connected to the fluid of the liquid spray pipe. In this way, in addition to brushing the teeth, the toothbrush head can also be supplied with tooth cleaning liquid through the above-mentioned liquid supply port, thereby providing the possibility of subsequent ejection of the tooth cleaning liquid, so that the toothbrush head according to the present disclosure becomes a toothbrush head that can be used for both brushing and irrigating.

[0062] In addition, as can be seen from the embodiments shown in Figures 1 and 2, the cross-section of the brush head body is trapezoidal. Alternatively or preferably, as can be seen from the embodiment shown in Figure 3A, the cross-section of the brush head body is a non-regular hexagon. More preferably, the two alternate sides of the non-regular hexagon are of equal length, and the six angles of the non-regular hexagon are all 60 degrees.

[0063] From the above three embodiments of toothbrush heads, it can be seen that the bristles can be completely covered with bristles on the periphery of the brush head body, or only on an area of ​​approximately one-quarter to one-half. Bristles can be divided into two types: long soft bristles and short hard bristles. The surface where the longer side of the circumferential surface is located is soft bristles, which are softer and more delicate; while the surface where the shorter side of the circumferential surface is located is hard bristles, which are thicker and shorter, and have a certain degree of elasticity and rigidity. The long bristles form a cylindrical brush head with a diameter of approximately 17 to 20 mm. The hard bristles are shorter than the soft bristles, forming a cylindrical shape with a diameter of approximately 13 to 16 mm. In some embodiments that can spray toothbrushes, the distribution of the hard bristles should also be careful not to block the liquid outlet to avoid the bristles affecting the direction and speed of the toothbrushes. The color of the bristles at the liquid outlet can be different from the bristles at other positions to distinguish the location of the liquid outlet. When the brush head is installed, the liquid outlet is located on the front of the handle. When the soft bristle mounting surface is aligned with the tooth surface, the soft bristles come into contact with the teeth and clean the tooth surface. As the toothbrush head rotates (including manual rotation or electric rotation), the soft bristles are deformed and bent in the opposite direction of rotation. At this time, the distance between the bristle mounting surface of the brush head body and the teeth becomes closer. When the bristle mounting surface is rotated to align with the tooth surface, the bristles on the bristle mounting surface come into contact with the teeth. Due to the short and hard characteristics of the bristles, some residues in the gaps between teeth and stubborn dirt on the tooth surface can be removed during the rotation and brushing process. The first bristles and the second bristles, i.e., the soft and hard bristles, are spaced apart along the circumferential surface. In the embodiment shown in Figure 3, the bristles are arranged on the entire circumferential surface of the brush head body.

[0064] In addition, as can be seen from Figure 3B, for the brush head body, the brush head body of the toothbrush head is designed as a triangular prism. The material is different from the brush head body of the traditional toothbrush head. Soft plastic or hard rubber can be selected, and it has a certain elasticity and toughness in the hand. The triangular prism is about 18mm long, and there are no bristles on the sides of the two ends of the long axis. The three sides of the triangle are equal in length, all about 10mm, and the three acute angles of the triangle are replaced by short sides of about 2.5mm, that is, the brush head body is a hexagonal prism structure. Three long sides, three short sides, the long side surface is the soft bristle mounting surface, and the short side surface is the hard bristle mounting surface. The central longitudinal axis of the brush head body has a longitudinal channel for the spray pipe to pass through, that is, the spray pipe channel. One end of the channel opens at the proximal end of the brush head body (i.e., the connecting end with the toothbrush handle), and the other end stops at the center point of the brush head body and communicates with the liquid outlet of the toothbrush liquid. One end of the toothbrush liquid outlet opens at the midpoint of the bristle mounting surface of the brush head, and the other end connects to the liquid spray pipe channel at the center of the brush head, providing single-point high-pressure jet flushing of the bristle mounting surface. One circular hole and two triangular longitudinal holes are designed at the proximal end of the brush head. These serve as slots for the micromotor rotor's teeth. Rotation of the rotor drives the brush head, and the circular holes align with the circular teeth to align the liquid spray port with the front of the toothbrush handle. Three triangular longitudinal holes are designed at the proximal end of the brush head. These serve as slots for the micromotor rotor's teeth, which drive rotation. A cylindrical protective plate fixing slot is located at the distal end of the brush head. One end of the fixing slot opens at the distal end of the brush head, and the other end maintains a minimum of 2 mm distance from the liquid spray pipe channel. This slot is secured to the pin at the top of the mucosal protective plate. This prevents the brush head from accidentally falling off during rotation. While the proximal fixing slot and the rotor's teeth provide a secure fit, this provides a double safeguard. A waterproof coil groove is designed near the liquid outlet of the spray pipe to prevent water leakage during the spraying of the tooth cleaning liquid. In summary, the number of the fixing holes is three and / or the cross section of the fixing holes is triangular or circular.

[0065] Figures 4A and 4B are another design scheme for the brush head body of the toothbrush head. In addition to the above-mentioned hexagonal prism type, the brush head body 410A and 410B of the toothbrush head can also be designed as an elliptical cylinder (Figure 4A) or a circular cylinder (Figure 4B). The internal structure is consistent with the above, with spray pipe channels 413A and 413B, liquid outlets 423A and 423B and rotating shaft fixing grooves 412A and 412B. The hard bristle mounting surfaces 414A and 414B in the figure are still covered with short hard bristles, and the soft bristle mounting surfaces 415A and 415B are surrounded by long soft bristles. There are no bristles on the upper part of the brush head body 410A and 410B. In the cylindrical solution, there is a boss at the mounting surface of the hard bristles.

[0066] Here, Figures 1 and 2 show another bristle distribution diagram. The brush head body of this toothbrush head has a different distribution of long and short bristles. Only the hard bristle mounting surface on the liquid outlet side is covered with short hard bristles, and the soft bristle mounting surfaces on both sides of the hard bristle mounting surface are covered with long soft bristles. The soft bristle mounting surface opposite the liquid outlet is a structure of soft rubber pads 111 and 211. The soft rubber pads 111 and 211 can protect the inner membrane of the oral cavity. This type of toothbrush head can be divided into several types according to the different angles of the bristles. Figures 1 and 2 are two representative types. The maximum opening angle of the long bristles can reach 180° and the minimum is 0°. This solution does not require a mucosal protection plate, but requires a micromotor to rotate back and forth to achieve the brushing effect. You can choose a brush head with different angles according to your own habits.

[0067] In addition, the second aspect of the present disclosure proposes an electric toothbrush, which includes: a shell, which forms a accommodating chamber and has a brush head end for mounting a toothbrush head; a toothbrush head, which is constructed as a toothbrush head for an electric toothbrush proposed in the first aspect of the present disclosure and is mounted to the brush head end; a first drive unit, which is arranged in the shell and is driven and connected to the toothbrush head to drive the toothbrush head to rotate; a liquid storage chamber, which is arranged in the accommodating chamber and is used to hold toothbrushing liquid; a liquid spray pipe, both ends of the liquid spray pipe are respectively connected to the liquid storage chamber and the liquid outlet fluid; and a second drive unit, which is arranged in the shell and is used to drive the toothbrushing liquid in the liquid storage chamber to flow out from the liquid outlet through the liquid spray pipe.

[0068] The structure of the drive unit according to the present disclosure will be described below. Figure 5 shows a schematic diagram of the first drive unit 500 according to one embodiment of the present disclosure. As can be seen from Figure 5, the micromotor 530 primarily drives the toothbrush head. The central cavity is hollow, housing the spray pipe passageway for the liquid spray tube. The diameter of the spray pipe passageway is slightly larger than the outer diameter of the spray pipe. A typical micromotor 530 is designed to rotate at a constant speed. Whenever the toothbrush outlet on the electric toothbrush head aligns with the side hole of the spray pipe, toothbrush solution is sprayed out to rinse the gaps between teeth. However, to achieve a better rinsing function, the micromotor 530 is also designed with a "step rotation mode." This means that when the toothbrush head rotates to the point where the outlet aligns with the side hole of the spray pipe, the toothbrush solution is sprayed out. This helps increase the pressure and rinsing effect of the toothbrush solution, and also enhances the user's brushing experience. Furthermore, the drive unit 500 also includes a rotor 531. The distal end of the micromotor 530 includes a rotor drive shaft, which drives the rotor 531 for rotation. The rotor 531 also has a centrally located spray pipe channel 533, which is connected to the micromotor 530 and has a diameter slightly larger than the outer diameter of the spray pipe. This allows the spray pipe in the spray pipe channel 533 to remain fixed in position while the rotor 531 rotates the brush head. Furthermore, the drive unit 530 also includes rotor latches 532. For example, three triangular prism-shaped rotating latches 532 are located at the distal end of the rotor 531. These latches connect to slots at the proximal end of the toothbrush body, securing the toothbrush head. When the micromotor 530 is installed, the cylindrical latches are positioned on the front of the handle. When the brush head engages the rotating latches, the cylindrical latches fit into the circular holes, securing the toothbrush head. This ensures that the liquid outlet is aligned with the front of the handle, and the rotation of the latches drives the rotation of the brush head. When the toothbrush head is mated with the rotating latch 532 , the liquid outlet is aligned with the latch on the front side of the handle and inserted into the slot. The rotation of the rotating latch 532 drives the toothbrush head to rotate.

[0069] Figure 6 shows a schematic diagram of a second drive unit and a liquid storage chamber according to an embodiment of the present disclosure. As can be seen in Figure 6, the flushing unit 640 is mounted within the housing, adjacent to the drive unit. The flushing unit 640 comprises a liquid spray pipe 648, a liquid storage chamber 644, a heating coil 649, a micromotor 641, a telescopic rod 642, and a piston 643. The liquid spray pipe 648 is a long cylindrical tube, open at one end and closed at the other. The closed end inserts into the liquid spray pipe channel in the toothbrush head. A side hole 647 is located on the side of the closed end, connecting to the liquid outlet of the toothbrush head. The lower portion of the side hole 647 is tightly wrapped with a waterproof coil to facilitate leak-free dispensing of the toothbrush liquid. The liquid spray pipe passes through the hollow passageway between the micromotor and the drive shaft. The open end is connected to the liquid storage chamber 644 and secured with glue. When securing, note that the liquid spray pipe side hole is located behind the liquid inlet of the liquid storage chamber 644. Liquid reservoir 644 holds approximately 10ml of toothbrush solution, ensuring intermittent dispensing during a 3-5 minute brushing session. Liquid reservoir 644 has a through hole at the top and bottom. The upper hole connects to the liquid spray tube 648, while the lower hole connects to the telescopic rod 642. A circular liquid inlet 645 is designed on the side of liquid reservoir 644 to facilitate the filling of the toothbrush solution. The knob plug 646 of liquid inlet 645 is designed to provide a good seal, ensuring the liquid reservoir is leak-proof. A high-resistance heating coil 649 is installed above liquid reservoir 644, between the liquid reservoir 644 and the micromotor, surrounding the outer circumference of the liquid spray tube. Under specific conditions, heating coil 649 generates heat when energized, heating the toothbrush solution as it passes through this section of the liquid spray tube. This keeps the temperature of the discharged toothbrush solution at approximately 37°C, making it ideal for users with sensitive teeth and preventing the stinging sensation caused by cold toothbrush solution, which can harm oral health.

[0070] To enable the dispensing of the dental cleaning solution, Figure 7A shows a schematic diagram of a second drive unit according to one embodiment of the present disclosure. This embodiment shows a telescopic rod 642 extending through a liquid reservoir 644. The rod comprises an inner rod 6421A and an outer rod 6422A. The design of the inner and outer rods reduces the overall length of the telescopic rod, thereby shortening the handle. Both the inner and outer rods can be adjusted relative to each other within the liquid reservoir 644. A piston 643A is located at the top of the telescopic inner rod. Piston 643A is tightly coupled to the inner wall of the liquid reservoir 644 and connected to the inner rod of the telescopic rod on one side. By moving the piston relative to inner rod 6421A, the piston propels the flow of the dental cleaning solution within the liquid reservoir. Of course, other drive structures can also be employed, such as a separate micromotor. In this case, by controlling the length of the inner rod within the liquid reservoir, the piston is pushed, forcing the dental cleaning solution in the liquid reservoir toward the spray tube, where it flows out through the side holes of the spray tube and ultimately out through the liquid outlet of the brush head, achieving a flushing effect. The two micromotors have an interactive drive design. To match the "stepping mode" of the micromotor that drives the toothbrush head, the micromotor for spraying liquid only starts to spray toothbrush liquid when the other micromotor rotates a full circle, that is, rotates (n+1) 360°. During the pause time of the micromotor that drives the toothbrush head, the micromotor pushes the piston to achieve the liquid spraying and interdental rinsing function. That is, when the liquid outlet is not aligned with the liquid outlet of the brush head, the micromotor for spraying liquid does not work. This motor interaction design can achieve an efficient liquid spraying and rinsing function, reduce the useless work of the micromotor for spraying liquid, and improve the battery life of the electric toothbrush. In summary, the second drive unit includes a second motor and a first piston disposed in the liquid storage chamber. The second motor is connected to the first piston, and the second motor drives the first piston to move to squeeze the liquid in the liquid storage chamber.

[0071] Of course, to achieve the purpose of spraying liquid and reduce the size of the housing, other drive structures can also be adopted, such as using only a single motor. This disclosure designs a single-motor electric toothbrush, with other structures remaining consistent with previous designs, as shown in Figure 7B, which shows a quarter-section along the centerline of the handle. The upper portion of the handle first houses a micromotor 630B, which functions similarly to the micromotor in Figure 6, driving the drive shaft to rotate the toothbrush head. A sensor 634B is located near the drive shaft on the upper portion of the micromotor to detect the rotation of the drive shaft. With each rotation of the drive shaft, the sensor receives a signal, energizing control coil 641B to generate current. The coil generates a magnetic field, which exerts a magnetic force on permanent magnet 642B, causing piston 643B to move to the right. During brushing, with each rotation of the drive shaft, coil 641B is energized, causing permanent magnet 642B to move downward from the handle, driving piston 643B to squeeze the toothbrush liquid, causing it to flow from the bottom of liquid reservoir 644B into spray tube 648B, thereby achieving the rinsing function. When you finish brushing your teeth, long-press the power button to turn off the toothbrush and pass a current in the opposite direction to the coil 641B, causing the permanent magnet 642B to move toward the upper part of the handle, driving the piston 643B to reset. There is a heating coil 649B in the middle of the spray tube, which still maintains the heating function of the toothbrush liquid. In summary, the second drive unit includes a control coil and a second piston. The second piston includes a piston head located in the liquid storage chamber and a magnetic component located in the control coil. The piston head and the magnetic component are connected. The power-on state of the control coil is controlled according to the position of the toothbrush head driven by the first drive unit to rotate, so as to form a magnetic field to control the movement of the second piston to squeeze the liquid in the liquid storage chamber.

[0072] Different from the previous driving mode, the present disclosure discloses another single-motor mode. This motor is a double-headed single motor, as shown in Figure 7C. Except for structure 642C, all other parts of Figure 7C are cut into quarters along the center line of the handle. The front end of the double-headed single motor 630C (the upper part of the handle) has a transmission shaft 634C with a hollow structure. When the motor is working, the transmission shaft rotates to drive the toothbrush head to rotate, which plays a role in brushing. A reciprocating screw 641C is set at the rear end of the double-headed single motor (the lower part of the handle), which is also a hollow structure. The spray pipe includes a first spray pipe (not shown in the figure) and a second spray pipe 648C. The second spray pipe 648C is installed in the liquid storage chamber 644C, and the left end of the second spray pipe 648C is located outside the liquid storage chamber 644C. The pressure cap 643C is slidably mounted on the left end of the second liquid spray pipe 648C. The pressure cap 643C is provided with a through hole. Specifically, the pressure cap 643C is a hollow sliding tube, and a baffle 6431C is provided inside the sliding tube. The baffle 6431C is provided with a through hole. The first liquid spray pipe is installed in the hollow structure of the transmission shaft 634C and the reciprocating screw 641C and is fixed to the transmission shaft 634C and the reciprocating screw 641C. One end of the first liquid spray pipe is a closed end. The closed end of the first liquid spray pipe is inserted into the liquid spray pipe channel in the brush head body. The side hole 647 of the closed end of the first liquid spray pipe always corresponds to the liquid outlet of the toothbrush head. The non-closed end of the first liquid spray pipe is connected to the left end of the second liquid spray pipe 648C. Specifically, the non-closed end of the first liquid spray pipe extends into the through hole of the pressure cap 643C. The pressure cover 643C can slide relative to the first liquid spraying pipe. The distance that the non-closed end of the first liquid spraying pipe extends into the pressure cover 643C is such that the non-closed end of the first liquid spraying pipe is located in the through hole of the pressure cover 643C during the left and right sliding of the pressure cover 643C. The outer diameter of the non-closed end of the first liquid spraying pipe is the same as the diameter of the through hole of the pressure cover 643C, so that the pressure cover 643C can not only slide relative to the first liquid spraying pipe, but also play a sealing role. The rotation of the transmission shaft 634C and the reciprocating screw 641C can drive the first liquid spraying pipe to rotate.The pressure block 642C is threadedly mounted on the reciprocating screw rod 641C. A card slot is provided on the pressure block 642C. A guide rod 646C that cooperates with the card slot is provided on the housing. The card slot on the pressure block 642C is clamped on the guide rod 646C and the card slot can slide relative to the guide rod 646C. One end of the reciprocating screw rod 641C extends into the left end of the sliding tube 643C. The double-headed single motor 630C drives the reciprocating screw rod 641C to rotate. Due to the action of the guide rod 646C, the rotation of the reciprocating screw rod 641C can make the pressure block 642C and the reciprocating screw rod move in a reciprocating manner. Rod 641C rotates relative to the reciprocating screw 641C, allowing pressure block 642C to move back and forth on the reciprocating screw 641C. When the reciprocating screw 641C drives pressure block 642C toward the liquid storage chamber 644C, pressure block 642C pushes pressure cap 643C toward the liquid storage chamber 644C, compressing the air in the second liquid spray pipe 648C and accelerating the flow rate. This creates a low-pressure area within the second liquid spray pipe 648C, causing the toothbrush liquid in the liquid storage chamber 644C to flow into the low-pressure area in the second liquid spray pipe 648C, thereby being sprayed out and rinsing. The length of the thread on the reciprocating screw 641 is such that for every one or several rotations (integer multiples of a full rotation) of the drive shaft 634C, pressure block 643C is compressed enough to spray the toothbrush liquid. After spraying, pressure block 642C returns to its original position, ready for a second compression. In other words, the toothbrush liquid is sprayed once every one or several rotations of the toothbrush head. A compression spring 649C is installed between the pressure cap 643C and the second liquid spray pipe 648C. Specifically, a step is provided on the left end of the second liquid spray pipe 648C. The inner diameter of the left side of the step is larger than that of the right side. The compression spring 649C is sandwiched between the step surface and the baffle 6431C. When the pressure cap 643C is pushed to the right by the pressure block 642C and then reset, the force of the compression spring 649C returns the pressure cap 643C to its original position. A heating coil 645C is fixed to the outside of the second liquid spray pipe 648C and heats the tooth cleaning solution, making it suitable for those with sensitive teeth. In summary, the pressing block and the pressing cover, the first driving unit is constructed as a first driving shaft with a hollow structure and a second driving shaft with a hollow structure, the first driving shaft is driven and connected to the toothbrush head, the pressing block is driven and installed on the second driving shaft, and a through hole is provided on the pressing cover, the spray pipe includes a first spray pipe and a second spray pipe, the first spray pipe and the second spray pipe are connected, the first spray pipe is arranged in the hollow structure of the first driving shaft and the second driving shaft and the first spray pipe extends into the through hole toward one end of the pressing block, the second spray pipe is arranged in the liquid storage chamber, the pressing cover is slidably installed on the end of the second spray pipe close to the second driving shaft, the first driving unit drives the pressing block to push the pressing cover to slide back and forth in the second spray pipe to form a low-pressure area in the second spray pipe, so that the liquid in the liquid storage chamber passes through the two spray pipes and the first spray pipe in turn and flows out from the liquid outlet.Preferably, in one embodiment according to the present disclosure, the second drive unit further comprises an elastic member, the end of the second liquid spraying tube close to the second drive shaft is located outside the liquid storage chamber, and a step is provided inside the end of the second liquid spraying tube close to the second drive shaft, the inner diameter of the second liquid spraying tube close to the second drive shaft is larger than the inner diameter of the second liquid spraying tube away from the second drive shaft, and the elastic member is provided in the sliding tube and sandwiched between the baffle and the step surface in the second liquid spraying tube. Preferably, in one embodiment according to the present disclosure, the second drive shaft is constructed as a reciprocating screw, the housing is provided with a guide rod, the pressure block is provided with a slot matching the guide rod, the pressure block is threadedly connected to the second drive shaft and the guide rod is located in the slot, and when the first drive unit drives the second drive shaft to rotate, the guide rod enables the pressure block to rotate relative to the second drive rod and reciprocate along the second drive rod, thereby pushing the sliding tube to slide in the second liquid spraying tube.

[0073] FIG8 shows a schematic diagram of the structure of a battery according to the present disclosure. As can be seen from FIG8 , the electric toothbrush further includes: a control circuit configured to control the first drive unit and the second drive unit; and a secondary battery 850, which is disposed in the accommodating cavity and electrically connected to the control circuit and the first motor. The power module is disposed at the bottom of the housing and includes a secondary battery 850 and an electromagnetic induction coil 851. This battery is a rechargeable battery and is connected to the two micromotors, heating coil, and circuit board to provide operating current.

[0074] When the entire circumferential surface is provided with bristles, an additional protective plate needs to be installed to protect the oral mucosa. Figure 9A shows a schematic diagram of a protective plate according to one embodiment of the present disclosure, Figure 9B shows a schematic diagram of a protective plate according to another embodiment of the present disclosure, Figure 9C shows a schematic diagram of a protective plate according to yet another embodiment of the present disclosure, and Figure 9D shows a schematic diagram of a protective plate according to yet another embodiment of the present disclosure. As can be seen from Figures 9A to 9D, the electric toothbrush also includes a protective plate, which has a pin portion and a clamping portion, and the toothbrush head is provided with a receiving hole at its end away from the housing, and the protective plate is fixed to the housing via the pin portion and the clamping portion. Specifically, the protective plate is also referred to as a mucosal protective plate 904, which is constructed as a variable diameter rotating shell structure. There is an axis pin 901 at the top of the protective plate, which cooperates with the fixing groove at the far end of the toothbrush head. The bottom of the protective plate is a clamping member 902, which is tightly fitted with the clamping groove on the rotating housing. The mucosal protective plate 904 is clamped to the front and back of the toothbrush handle. The primary function of the mucosal protection plate 904 is to reduce frictional damage to the oral mucosa of the lips and cheeks that can occur during brush head rotation. Additionally, the plate provides secondary reinforcement to prevent the brush head from accidentally falling off. To replace the brush head, first remove the snap-fit ​​element 902. Then, simply pull up the plate, allowing the pin 901 to disengage from the retaining slot. This allows the entire plate to detach and the toothbrush head to be removed for replacement. Once the toothbrush head is replaced, align the pin 901 of the plate with the retaining slot. Then, slide the snap-fit ​​element 902 horizontally from the rear of the handle into the retaining slot to secure the brush head. To prevent the mucosal protection plate from increasing the brush head's circumferential diameter and impacting the user experience, the inner diameter of the mucosal protection plate is only 13 to 16 mm larger than the bristles. The long, soft bristles are curved in one direction within the mucosal protection plate 904. This ensures that the brush head diameter, including the mucosal protection plate 904, is within 17-20 mm, a size that does not cause discomfort when placed in the mouth. Furthermore, the mucosal protection plate can be designed to cover only 1 / 3, 1 / 2, or 2 / 3 of the brush head's circumference. This allows the mucosal protection plate 904 to effectively protect the oral mucosa of the lips and cheeks while minimizing its size. The inner side of the protection plate features longitudinal grooves 903 for squeezing toothpaste. As the brush head rotates, the toothpaste is applied to the bristles and washes the teeth. This allows users who are temporarily unable to use toothbrush liquids to achieve a comprehensive flushing and brushing experience.

[0075] The protective plate proposed in this disclosure also has alternative design options. The upper portion 905 of the mucosal protective plate remains the same as the previous structure, but its lower portion features a long fixed shaft for securing it to the handle. The protective plate is secured to the handle by pressing the push button on the handle. The fixed shaft of the protective plate inserts into a pre-set hole in the handle. The teeth on the fixed shaft engage with the notches in the handle to secure it. Pressing again releases the engagement, allowing the fixed shaft to be removed. A mucosal protective plate with a non-slip surface is shown in the figure. The neck of the protective plate features non-slip surfaces 906 and 907 on the inside and outside. The outer portion features a non-slip raised block 906, while the inner portion features a non-slip groove 907 that mates with the non-slip member on the neck of the handle. To install the protective plate, first insert the pin 901 into the fixing groove on the brush head. Then, press with your thumb against the external non-slip member and push toward the end of the handle. The internal non-slip groove mates with the non-slip member on the handle. To remove the protective plate, the reverse procedure is repeated: press with your thumb against the external non-slip member and push toward the toothbrush head.

[0076] Figure 10 shows a schematic diagram of the entrance of the liquid storage chamber according to an embodiment of the present disclosure. As can be seen from Figure 10, the electric toothbrush according to the present disclosure can also be equipped with tooth cleaning liquid, which is divided into household and daily disposable types. The household type has a larger capacity of tooth cleaning liquid, and the sealing cover is equipped with a tooth cleaning liquid suction tube. The suction tube draws a certain amount of tooth cleaning liquid and pours the tooth cleaning liquid from the liquid inlet of the liquid storage chamber. After the pouring is completed, the sealing cover seals and stores the tooth cleaning liquid. This type of tooth cleaning liquid can be used about 30 times (one month's consumption). In addition, it can also be designed as a daily disposable type of tooth cleaning liquid with a capacity of 10ml, which is convenient to carry. The tooth cleaning liquid bottle is made of plastic, such as PP or PE. By rotating the handle by hand, the neck breaks, and the broken neck is aligned with the liquid inlet of the liquid storage chamber. The bottle body is squeezed to pour the tooth cleaning liquid into the liquid storage chamber. Tighten the knob plug to rinse the teeth. As for the design of toothbrushing liquid, there is also a capsule-type travel-sized toothbrushing liquid. This toothbrushing liquid can be used with another liquid inlet method. The sealing method of this liquid storage chamber is designed to be snap-type. Open the snap, insert the capsule-type toothbrushing liquid 1001 into the liquid inlet, and the barbed mesh 1002 pierces the capsule. The toothbrushing liquid flows into the liquid storage chamber. After filling is completed, fasten the snap 1003 to seal it.

[0077] All of the components described above need to be housed within a housing. Figure 11 shows a schematic diagram of the housing according to one embodiment of the present disclosure. As can be seen from Figure 11, this structure protects both the rotating shaft and the bristles from damaging the oral lining. The protective plate does not need to be removed when replacing the brush head. This structure can serve as another example of a protective plate. A fixed clip is positioned within the housing, with five designated snap-in locations 1101, 1102, 1103, 1104, and 1105. The drive unit, flushing unit, and power supply are all mounted on the fixed clip. Each module is installed in its corresponding snap-in slot. The fixed clip is inserted from the bottom of the housing and pushed into place to secure it in a pre-set position. Once the internal components of the handle housing are installed, a rotating housing is installed on the upper portion of the handle to protect the drive shaft from rotating within it and also provide waterproofing. The rotating housing and handle housing are sealed and secured together by snaps and waterproof coil C. A groove in the protective housing secures the mucosal protection plate with the aforementioned snap-in locations. The housing is the outermost structure of the handle, connected to the rotating housing at the top and sealed to the base with waterproof coil D at the bottom. The front of the device is designed with reserved space for the switch, rotary button and display. A transparent window is designed on the back of the housing to facilitate observation of the amount of tooth cleaning liquid before use.

[0078] After assembling the above parts, an electric toothbrush according to the contents of the present disclosure can be formed. Figure 12 shows a schematic diagram of an electric toothbrush according to an embodiment of the contents of the present disclosure. As can be seen in the diagram of the electric toothbrush, there are two buttons designed on the handle: a power and mode button, and a rotation direction adjustment button. Press and hold the power and mode buttons for 3 seconds to start the toothbrush. Continue to press the buttons to adjust the five modes: Clean, White, Polish, Massage, and Sensitive. The rotation speed and spray pressure are different in different modes. The sensitive mode uses a heating coil to heat the tooth cleaning solution, so people with sensitive teeth do not need to use warm water to brush their teeth. A rotation direction adjustment button is also designed to adjust the rotation direction of the brush head according to the different brushing directions of the upper teeth, lower teeth, and the inside of the teeth, so that the toothbrush brushes from the root to the outside, in line with the Luo method of brushing.

[0079] In summary, the toothbrush head and the corresponding electric toothbrush proposed in accordance with the present disclosure firstly use two bristles of different hardness, namely, first bristles having a first hardness and second bristles having a second hardness greater than the first hardness, so that different bristles can be used to target common stains on the tooth surface and in the gaps between teeth, as well as stubborn stains (such as mild tartar), thereby achieving more comprehensive cleaning. In addition, because the second bristles of the second hardness are shorter than the first bristles, the bristles of higher hardness can be made shorter, thereby better maintaining their hardness and thus better cleaning stubborn stains.

[0080] Although embodiments of the present invention have been described with reference to several specific embodiments, it should be understood that the embodiments of the present invention are not limited to the specific embodiments disclosed. Embodiments of the present invention are intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A toothbrush head for an electric toothbrush, characterized in that: The toothbrush head comprises: A brush head body, the brush head body having a rotation axis along its longitudinal axis and a circumferential surface thereof having a circumferential surface that is not always at the same distance from the rotation axis, wherein a first rotation fixing structure for mounting the brush head body is provided on a first end of the brush head body; and Bristles are arranged on the circumferential surface and include first bristles having a first hardness and second bristles having a second hardness greater than the first hardness, wherein the distance between the circumferential surface on which the first bristles are arranged and the rotation axis is smaller than the distance between the circumferential surface on which the second bristles are arranged and the rotation axis, and wherein the distance between the free end of the first bristles and the rotation axis is greater than the distance between the free end of the second bristles and the rotation axis.

2. The toothbrush head according to claim 1, characterized in that: The brush head body is also provided with a liquid supply port on the first end for accommodating a liquid spraying tube.

3. The toothbrush head according to claim 2, characterized in that: The brush head body has a liquid outlet in the area where the second bristles are arranged, and the liquid outlet is in fluid communication with the liquid spraying pipe.

4. The toothbrush head according to claim 2, characterized in that: The first rotation fixing structure is provided with a fixing hole on the first end.

5. The toothbrush head according to claim 4, characterized in that: The number of the fixing holes is three and / or the cross section of the fixing holes is triangular or circular.

6. The toothbrush head according to claim 1, characterized in that: The first bristles and the second bristles are spaced apart along the circumferential surface.

7. The toothbrush head according to claim 1, characterized in that: The bristles are arranged on the entire circumferential surface of the brush head body.

8. The toothbrush head according to claim 1, characterized in that: The bristles are arranged in an elongated area of ​​the circumferential surface along the longitudinal axis, and the width of the elongated area is less than half of the circumferential length of the circumferential surface.

9. The toothbrush head according to claim 8, characterized in that: A soft rubber pad is arranged on the circumferential surface in an area other than the long strip area.

10. The toothbrush head according to claim 8, characterized in that: The cross section of the brush head body is trapezoidal.

11. The toothbrush head according to claim 1, characterized in that: The cross section of the brush head body is a non-regular hexagon.

12. The toothbrush head according to claim 11, characterized in that: The two sides of the interval of the non-regular hexagon are of equal length, and the six angles of the non-regular hexagon are all 60 degrees.

13. The toothbrush head according to claim 2, characterized in that: The liquid supply port is symmetrical about the center of the rotation axis.

14. An electric toothbrush, characterized in that: The electric toothbrush comprises: A housing, the housing forming a receiving cavity and having a brush head end for mounting a toothbrush head; a toothbrush head, the toothbrush head being configured as a toothbrush head for an electric toothbrush according to any one of claims 3 to 13 and being mounted to the brush head end; A first driving unit is disposed in the housing and is drivingly connected to the toothbrush head to drive the toothbrush head to rotate; A liquid storage chamber, the liquid storage chamber is arranged in the receiving chamber and is used to receive the tooth cleaning liquid; a liquid spray pipe, wherein both ends of the liquid spray pipe are respectively in fluid communication with the liquid storage chamber and the liquid outlet; and A second driving unit is disposed in the housing and is used to drive the tooth cleaning liquid in the liquid storage chamber to flow out from the liquid outlet through the liquid spraying pipe.

15. The electric toothbrush according to claim 14, characterized in that: The electric toothbrush also includes: a control circuit configured to control the first drive unit and the second drive unit; and A secondary battery is disposed in the accommodating cavity and is electrically connected to the control circuit and the first motor.

16. The electric toothbrush according to claim 14, characterized in that The electric toothbrush further comprises a protection plate having a pin portion and a clamping portion, and the toothbrush head is provided with a receiving hole at its end away from the housing, and the protection plate is fixed to the housing via the pin portion and the clamping portion.

17. The electric toothbrush according to claim 14, characterized in that: The second driving unit includes a second motor and a first piston disposed in the liquid storage chamber. The second motor is connected to the first piston, and the second motor drives the first piston to move to squeeze the liquid in the liquid storage chamber.

18. The electric toothbrush according to claim 14, characterized in that The second driving unit includes a control coil and a second piston, the second piston includes a piston head located in the liquid storage chamber and a magnetic component located in the control coil, the piston head and the magnetic component are connected, and the power-on state of the control coil is controlled according to the position of the toothbrush head driven by the first driving unit to rotate, so as to form a magnetic field to control the movement of the second piston to squeeze the liquid in the liquid storage chamber.

19. The electric toothbrush according to claim 14, characterized in that: The second driving unit includes a pressing block and a pressing cover. The first driving unit is constructed as a first driving shaft with a hollow structure and a second driving shaft with a hollow structure. The first driving shaft is connected to the toothbrush head driving, and the pressing block is driven and installed on the second driving shaft. A through hole is provided on the pressing cover. The spray pipe includes a first spray pipe and a second spray pipe. The first spray pipe and the second spray pipe are connected. The first spray pipe is arranged in the hollow structure of the first driving shaft and the second driving shaft and the first spray pipe extends into the through hole toward one end of the pressing block. Two liquid spraying pipes are arranged in the liquid storage chamber, and the pressure cover is slidably installed at one end of the second liquid spraying pipe close to the second driving shaft. The first driving unit drives the pressure block to push the pressure cover to slide back and forth in the second liquid spraying pipe to form a low-pressure area in the second liquid spraying pipe, so that the liquid in the liquid storage chamber passes through the two liquid spraying pipes and the first liquid spraying pipe in sequence and flows out from the liquid outlet. The driving shaft of the first driving unit is constructed to drive the control screw at the end away from the toothbrush head to form a low-pressure area in the liquid storage chamber, so that the liquid in the liquid storage chamber is sprayed out.

20. The electric toothbrush according to claim 19, characterized in that The second driving unit also includes an elastic component, one end of the second liquid spray pipe close to the second driving shaft is located outside the liquid storage chamber, and a step is provided inside the end of the second liquid spray pipe close to the second driving shaft, the inner diameter of the second liquid spray pipe close to the second driving shaft is larger than the inner diameter of the second liquid spray pipe away from the second driving shaft, and the elastic component is arranged in the sliding tube and clamped between the baffle and the step surface in the second liquid spray pipe.

21. The electric toothbrush according to claim 19, characterized in that The second driving shaft is constructed as a reciprocating screw, a guide rod is provided on the shell, a slot matching the guide rod is provided on the pressure block, the pressure block is threadedly connected to the second driving shaft and the guide rod is located in the slot, and when the first driving unit drives the second driving shaft to rotate, the guide rod enables the pressure block to rotate relative to the second driving rod and reciprocate along the second driving rod to push the sliding tube to slide in the second liquid spraying tube.

22. The electric toothbrush according to claim 14, characterized in that The electric toothbrush further includes a heating coil, which is disposed at the liquid spraying pipe.

23. The electric toothbrush according to claim 14, characterized in that The first driving unit is constructed as a first motor, and a hollow driving shaft of the first motor is fixedly connected to the toothbrush head via the first rotation fixing structure to drive the toothbrush head to rotate.

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