Electric toothbrush head and electric toothbrush

Abstract

When the electric toothbrush head and the electric toothbrush are used, the connecting part on the rod part is connected with the electric toothbrush, and the head part can be driven to drive bristles to move under the driving action of a machine core in the electric toothbrush, so that teeth are cleaned; the water filling nozzle on the rod part is connected with the oral irrigator, and under the driving action of the water pump in the oral irrigator, water in the water tank in the oral irrigator can sequentially flow through the water filling nozzle and the cavity and is finally sprayed out through the nozzle, so that teeth are irrigated; due to the fact that the water injection opening is formed outside the rod part, the toothbrush can be directly connected with the oral irrigator without dismounting the toothbrush handle, when the use function is switched, only one-time dismounting is needed, operation is simple, and time and labor are saved; due to the fact that the water filling nozzle is arranged outside the rod portion, a channel does not need to be arranged in the driving shaft with the small diameter and the brush handle with the complex internal structure, manufacturing difficulty is smaller, and production cost is lower. In general, the brush head of the electric toothbrush can be conveniently and quickly connected with the oral irrigator and is convenient to manufacture, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electric toothbrushes, in particular to an electric toothbrush head and an electric toothbrush. Background Art

[0002] With the continuous improvement of living standards, people pay more and more attention to oral cleaning and maintenance. In order to clean the teeth more thoroughly, we have created electric toothbrushes based on manual toothbrushes. In order to extend the service life of electric toothbrushes, the brush handle with a drive shaft at the end and the brush head with bristles at the end are usually detachably connected, so that the bristles on the brush head can be replaced when they are severely deformed. However, current electric toothbrushes still cannot clean the gaps between teeth. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In order to solve the above problems, the present invention provides an electric toothbrush head and an electric toothbrush, which are convenient for quick connection with an oral irrigator, and are also convenient for manufacturing and reduce production costs.

[0005] (II) Technical solution

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An electric toothbrush head comprises a head for connecting bristles and a rod extending from the head, wherein a cavity is provided inside the rod, and a water inlet connected to the cavity and a connecting portion not connected to the cavity are provided outside the rod, wherein the water inlet can be connected to an oral irrigator, and the connecting portion can be connected to a handle of an electric toothbrush, so that the electric toothbrush head can be connected to the oral irrigator and the handle of the electric toothbrush separately or simultaneously, and a nozzle connected to the cavity is provided on the head, so that liquid in the oral irrigator can flow through the water inlet, the cavity and the nozzle in sequence.

[0008] Preferably, the rod portion comprises:

[0009] A rod body, one end of which is connected to the head, and the cavity is arranged inside the rod body and is open at one end away from the head;

[0010] A plug body is detachably connected to an end of the rod body away from the head and is used to close the cavity.

[0011] Preferably, the inner wall of the rod body is provided with a basically annular groove, and the plug body is provided with a basically annular protrusion corresponding to the groove, and at least one of the rod body, the plug body and the protrusion is elastic. The rod body and the plug body can be snap-connected by the cooperation of the groove and the protrusion to close the bottom of the cavity.

[0012] Preferably, a sealing colloid is filled between the rod body and the plug body to enhance the sealing property of the cavity.

[0013] Preferably, the water injection port is arranged on the rod body.

[0014] Preferably, the water injection port is arranged on the plug body.

[0015] Preferably, a limit groove and a positioning groove are provided inside the rod body, and a limit piece corresponding to the limit groove and a positioning piece corresponding to the positioning groove are provided on the plug body. After the rod body and the plug body are connected, the limit piece can be inserted into the limit groove to prevent the rod body and the plug body from rotating relative to each other, and the positioning piece can be inserted into the positioning groove to prevent the rod body and the plug body from shaking and misaligning relative to each other.

[0016] Preferably, the connecting part is arranged on the plug body, the connecting part is a narrow and long groove structure and an elastic block is arranged inside, the elastic block is provided with a second limiting part, the electric toothbrush includes a brush handle with a driving shaft, and the driving shaft is provided with a first limiting part corresponding to the second limiting part, the driving shaft can be inserted into the connecting part and a cantilever snap connection is performed through the cooperation of the first limiting part and the second limiting part.

[0017] Preferably, after the connecting portion is connected to the driving shaft, there is a distance between an end of the electric toothbrush head close to the brush handle and an end of the brush handle close to the electric toothbrush head.

[0018] Preferably, the elastic block is a closed structure, used to close one side of the connecting portion to prevent liquid from leaking from the elastic block.

[0019] Preferably, the second limiting portion is a tooth-shaped structure, and the first limiting portion is provided with a tooth groove structure corresponding to the tooth-shaped structure.

[0020] Preferably, the second limiting portion is made of a deformable hard material, and the elastic block is provided with first elastic enhancement areas made of a soft elastic material on both sides of the second limiting portion for enhancing the elastic deformation capability of the second limiting portion.

[0021] Preferably, a second elastic reinforcement area made of soft elastic material is provided on the side of the elastic block away from the second limiting portion. After the rod body and the plug body are connected, the second elastic reinforcement area can abut and press against the inner wall of the rod body to further enhance the elastic deformation capacity of the second limiting portion.

[0022] An electric toothbrush comprises an electric toothbrush head and a brush handle. The brush handle is provided with a driving shaft, and the electric toothbrush head is connected to the driving shaft.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Since the water inlet is arranged on the outside of the rod, the water flosser can be directly connected without removing the handle of the electric toothbrush. When switching the function, only one disassembly and assembly is required, which is simple to operate and saves time and effort. Since the water inlet is arranged on the outside of the rod, there is no need to set a channel in the driving shaft with a smaller diameter and the brush handle with a complex internal structure, so the manufacturing difficulty is smaller and the production cost is lower. In general, the electric toothbrush head in the present application is convenient for quick connection to the water flosser, and is also convenient for manufacturing and reduces production costs.

[0026] Furthermore, since the brush handle and the drive shaft do not need to be modified accordingly according to the teeth flushing function of the electric toothbrush head, the electric toothbrush head in the present application has a wider adaptability range.

[0027] Furthermore, since the electric toothbrush head can be connected to the water flosser and the electric toothbrush alone or simultaneously, the electric toothbrush head in the present application is more flexible to use. Specifically, when the electric toothbrush head is connected to the electric toothbrush alone, it is easy to hold and carry, and can be used as an ordinary electric toothbrush; when the electric toothbrush head is connected to the water flosser alone, it is easy to hold and carry, and can be used as an ordinary water flosser; when the electric toothbrush head is connected to the water flosser and the electric toothbrush at the same time, after one function is used up, the other function can be seamlessly connected for use, without the need for disassembly and assembly, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 A three-dimensional diagram of an electric toothbrush head and an electric toothbrush is shown when the water injection port is located on the rod body in the present invention;

[0030] Figure 2 Shows Figure 1 A magnified view of part A in FIG.

[0031] Figure 3 Shows Figure 1 A perspective view of the middle brush handle and drive shaft;

[0032] Figure 4 Shows Figure 1 A three-dimensional view of the middle brush handle and the drive shaft from another angle;

[0033] Figure 5 Shows Figure 4A magnified view of part B in FIG.

[0034] Figure 6 Shows Figure 1 Stereoscopic view of the middle head and shaft;

[0035] Figure 7 Shows Figure 6 A connecting portion of a brush head rod of an electric toothbrush;

[0036] Figure 8 Shows Figure 6 A cutaway perspective view of a horizontal section at a stop;

[0037] Fig. 9 Shows Figure 6 A cutaway perspective view of a horizontal section at a positioning member;

[0038] Fig.10 Shows Figure 6 Schematic diagram of the explosion structure of the middle rod body and the plug body;

[0039] Fig.11 Shows Fig.10 Plan view of the middle plug body;

[0040] Fig.12 Shows Figure 1 a cutaway perspective view of a vertical section through the water injection port;

[0041] Fig.13 Shows Fig.12 The enlarged view of the D part in FIG.

[0042] Fig.14 A three-dimensional diagram of an electric toothbrush head and an electric toothbrush is shown when the water injection port is located at the plug body in the present invention;

[0043] Fig.15 Shows Fig.14 Stereoscopic view of the middle head and shaft;

[0044] Fig.16 Shows Fig.14 Schematic diagram of the explosion structure of the middle rod body and the plug body;

[0045] Fig.17 Shows Fig.14 Plan view of the middle plug body;

[0046] Fig.18 Shows Fig.14 a cutaway perspective view of a vertical section through the water injection port;

[0047] Fig.19 Shows Fig.12 and Fig.18 The enlarged view of the C part in FIG.

[0048] Fig. 20 Shows Fig.18 The enlarged view of part E in FIG.

[0049] Fig.21 It shows a plan view of the electric toothbrush head of the present invention after being connected to the water flosser alone;

[0050] Fig. 22 The plan view shows the electric toothbrush head of the present invention connected to the oral irrigator and the handle of the electric toothbrush at the same time.

[0051] In the figure: 1, head; 101, bristles; 2, rod; 2a, cavity; 21, rod body; 211, slot; 212, limit slot; 213, positioning slot; 22, plug body; 221, protrusion; 222, limit piece; 223, positioning piece; 224, elastic block; 2241, first elastic reinforcement area; 2242, second elastic reinforcement area; 2243, second limit part; 3, water inlet; 4, connecting part; 5, nozzle; 6, sealing colloid; 7, brush handle; 8, driving shaft; 81, first limit part; 9, oral irrigator; 91, hose. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] The embodiment of the present invention discloses an electric toothbrush head. Figure 1 and attached Fig.14 , comprising a head 1 for connecting bristles 101 and a stem 2 extending from the head 1, see the attached Fig.13 and attached Fig. 20 The rod 2 has a cavity 2a inside, see the attached Figure 6 , Attachment Figure 7 and attached Fig.15 The rod 2 is provided with a water inlet 3 connected to the cavity 2a and a connecting portion 4 not connected to the cavity 2a. Fig.21 The water inlet 3 can be connected to the water flosser 9, see the attached Figure 1 and attached Fig.14 The connecting portion 4 can be connected to the handle 7 of the electric toothbrush, so that the electric toothbrush head can be connected to the irrigator 9 and the handle 7 of the electric toothbrush alone or simultaneously. Fig.14 , Attachment Fig.21 and attached Fig. 22 ; See attached Figure 2 and attached Fig.19A nozzle 5 connected to the cavity 2a is provided on the head 1, so that the liquid in the water flosser 9 can flow through the water injection port 3, the cavity 2a and the nozzle 5 in sequence.

[0054] In actual use, the electric toothbrush is connected through the connecting part 4 on the rod 2. Under the driving action of the movement in the electric toothbrush, the head 1 can be driven to drive the bristles 101 to vibrate at a high frequency or reciprocate, thereby decomposing the toothpaste and cleaning the teeth; the water inlet 3 on the rod 2 is connected to the water flosser 9. Under the driving action of the water pump in the water flosser 9, the water in the water tank of the water flosser 9 can flow through the water inlet 3 and the cavity 2a in turn, and finally be sprayed out through the nozzle 5, so as to clean the teeth and the gaps between the teeth by means of pulsed water flow; The water inlet 3 is arranged on the outside of the rod 2, so there is no need to remove the handle 7 of the electric toothbrush to directly connect the oral irrigator 9. When switching the function, only one disassembly and assembly is required, which is simple to operate and saves time and effort. Since the water inlet 3 is arranged on the outside of the rod 2, there is no need to set a channel in the driving shaft 8 with a smaller diameter and the handle 7 with a complex internal structure, so the manufacturing difficulty is smaller and the production cost is lower. In general, the electric toothbrush head in the present application is convenient for quick connection to the oral irrigator 9, and is also convenient for manufacturing and reduces production costs.

[0055] It should be noted that the present application does not define the shape, size, material, color and other parameters of the head 1, the stem 2, the water inlet 3 and the connecting portion 4, does not define the size, shape, number and sparseness of the bristles 101, does not define the number, distribution method, spray pattern and other parameters of the nozzles 5, so the above components or structures can be flexibly designed according to actual needs; see the attached Figure 6 and attached Fig.15 Taking the water injection port 3 as an example, the water injection port 3 can be set as a pipeline structure, and the extension direction can be designed in a straight line, L shape, etc., so as to facilitate the connection of the water flosser 9.

[0056] It should be noted that the brush handle 7 and the water flosser 9 of the electric toothbrush in the present application can adopt the brush handle 7 and the water flosser 9 of the prior art. As long as the brush handle 7 of the electric toothbrush can be connected to the connecting part 4 on the rod part 2, it can be used normally. Therefore, there is no restriction on the brushing mode of the electric toothbrush, and the teeth can be cleaned by reciprocating swinging or reciprocating rotation. Similarly, as long as the water flosser 9 can be connected to the water inlet 3 on the rod part 2, it can also be used, and the water flow can be processed and the teeth can be rinsed by pulse or ultrasonic methods. Furthermore, when the brush head of the electric toothbrush is connected to the water flosser 9 and the electric toothbrush at the same time, a hose 91 connected to the water tank can be provided on the water flosser 9, and the water inlet 3 is connected through the hose 91. At this time, the brush handle 7 of the electric toothbrush can be directly held to use the functions of brushing and rinsing without picking up the water flosser 9 and the electric toothbrush at the same time. The weight is lighter, the volume of the structure that moves with the hand is smaller, and it is more convenient to use.

[0057] It should be noted that the above-mentioned "connection" includes two types of connection: detachable connection and non-detachable connection.

[0058] See attached Figure 6 , Attachment Fig.10 , Attachment Fig.15 and attached Fig.16 In this embodiment, one structure of the rod portion 2 is introduced. Specifically, the rod portion 2 includes a rod body 21 and a plug body 22. One end of the rod body 21 is connected to the head 1. The cavity 2a is arranged inside the rod body 21 and is open at one end away from the head 1. The plug body 22 is detachably connected to the end of the rod body 21 away from the head 1 to close the cavity 2a.

[0059] Based on the above scheme, except that the cavity 2a is provided inside the rod body 21, the rest of the structure is similar to the traditional electric toothbrush head. Therefore, by slightly improving the manufacturing process of the traditional electric toothbrush head, the electric toothbrush head in this application can be processed and produced, and the processing difficulty is relatively small and easy to manufacture.

[0060] See attached Figure 7 -Attached Fig. 9 It should be noted that the above-mentioned "cavity 2a" specifically refers to the continuous and uninterrupted space formed between the inner wall of the rod body 21 and the outer wall of the plug body 22. The shape of the cavity 2a is not necessarily regular, and the gap sizes in different parts are not necessarily the same. However, when the rod body 21 is placed vertically, the cavity 2a will have holes in each horizontal section from top to bottom to allow liquid to flow in the cavity 2a.

[0061] Furthermore, the rod body 21 and the plug body 22 may be non-detachably fixedly connected or directly integrated into one design, thereby enhancing the sealing property of the cavity 2a.

[0062] See attached Fig.11 , Attachment Fig.13 , Attachment Fig.17 and attached Fig. 20 There are various ways and structures of detachable connection, and one of them is introduced in this embodiment. Specifically, the inner wall of the rod body 21 is provided with a basically annular groove 211, and the plug body 22 is provided with a basically annular protrusion 221 corresponding to the groove 211. At least one of the rod body 21, the plug body 22 and the protrusion 221 is elastic. The rod body 21 and the plug body 22 can be snap-connected by cooperating with the groove 211 and the protrusion 221 to close the bottom of the cavity 2a.

[0063] See attached Fig.16 and attached Fig.17Since the rod body 21 and the plug body 22 in the above scheme are detachably connected, some gaps may be generated at the connection between the two after the connection. In order to prevent liquid from leaking from the cavity 2a, the following design is carried out in this embodiment. Specifically, a sealing colloid 6 is filled between the rod body 21 and the plug body 22.

[0064] Through the design of the above structure, the sealing property of the cavity 2a can be effectively enhanced; further, the sealing colloid 6 is obviously elastic, so after the rod body 21 and the plug body 22 are connected, the sealing colloid 6 can be in a deformed state after being squeezed, thereby further enhancing the sealing property of the cavity 2a through the elasticity of the sealing colloid 6 itself.

[0065] See attached Fig.16 It should be noted that the sealing colloid 6 should be arranged in a staggered manner with the water injection port 3, or a hole structure communicating with the water injection port 3 should be arranged on the sealing colloid 6 to prevent obstruction to the flow of the liquid.

[0066] The present application does not limit the location of the water injection port 3 on the rod 2, so it can be flexibly designed according to actual conditions. On the basis that the rod 2 is composed of the rod body 21 and the plug body 22, there are two design methods for the water injection port 3 on the rod 2. Specifically, the first method is as follows: Figure 6 and attached Fig.13 , the water injection port 3 is set on the rod body 21; the second type, refer to the attached Fig.15 and attached Fig. 20 The water inlet 3 is arranged on the plug body 22 .

[0067] See attached Figure 8 -Attached Fig.11 The structures of the rod body 21 and the plug body 22 are often similar to those of a rotating body. In order to prevent the two from rotating with each other after being connected, the following design is carried out in this embodiment. Specifically, a limiting groove 212 and a positioning groove 213 are provided inside the rod body 21, and a limiting piece 222 corresponding to the limiting groove 212 and a positioning piece 223 corresponding to the positioning groove 213 are provided on the plug body 22. After the rod body 21 and the plug body 22 are connected, the limiting piece 222 can be inserted into the limiting groove 212, and the positioning piece 223 can be inserted into the positioning groove 213.

[0068] Through the design of the above structure, after the rod body 21 and the plug body 22 are connected, the limiting member 222 can be inserted into the limiting groove 212, thereby preventing the rod body 21 and the plug body 22 from rotating relative to each other; in addition, after the rod body 21 and the plug body 22 are connected, the positioning member 223 can be inserted into the positioning groove 213, thereby preventing the rod body 21 and the plug body 22 from shaking and misaligning relative to each other, thereby making the connection between the rod body 21 and the plug body 22 more stable and firm.

[0069] See attached Figure 3 -Attached Figure 6 And attached Fig.10 -Attached Fig.13 In order to more clearly understand how the connecting part 4 is connected to the electric toothbrush, based on the fact that the rod part 2 is composed of a rod body 21 and a plug body 22, the connecting part 4 is designed as follows in this embodiment. Specifically, the connecting part 4 is arranged on the plug body 22, and the connecting part 4 is a narrow and long groove structure and an elastic block 224 is arranged inside. The elastic block 224 is provided with a second limiting portion 2243. The electric toothbrush includes a handle 7 with a driving shaft 8, and the driving shaft 8 is provided with a first limiting portion 81 corresponding to the second limiting portion 2243. The driving shaft 8 can be inserted into the connecting part 4 and can be cantilevered and snap-connected through the cooperation of the first limiting portion 81 and the second limiting portion 2243. After the connecting part 4 is connected to the driving shaft 8, there is a distance between the end of the electric toothbrush head close to the handle 7 and the end of the handle 7 close to the electric toothbrush head.

[0070] Based on the above scheme, since the drive shaft 8 can be inserted into the connecting part 4 and connected by a cantilever snap-on connection, the electric toothbrush head is detachable from the electric toothbrush. Therefore, the electric toothbrush head, like an ordinary electric toothbrush head, can be easily replaced after being dirty or damaged. In addition, since after the connecting part 4 is connected to the drive shaft 8, there is a gap between the end of the electric toothbrush head close to the brush handle 7 and the end of the brush handle 7 close to the electric toothbrush head. Therefore, when the drive shaft 8 vibrates, it can drive the rod 2 and the head 1 to vibrate, and the vibration of the rod 2 will not be hindered by the brush handle 7.

[0071] It should be noted that the specific structures of the first limiting portion 81 and the second limiting portion 2243 are not limited in this embodiment, so they can be flexibly designed according to actual needs. On the basis of "after the drive shaft 8 is inserted into the connecting portion 4, the first limiting portion 81 can be designed as a protruding structure, and the second limiting portion 2243 can be designed as a groove structure corresponding to the above-mentioned protruding structure; see the attached Figure 5 , Attachment Fig.13 and attached Fig. 20 The first limiting portion 81 can also be designed as a groove structure, and the second limiting portion 2243 can be designed as a protruding structure corresponding to the above groove structure. The above two design methods can both realize the snap connection between the drive shaft 8 and the connecting portion 4. In this embodiment, the second method is selected for the snap connection.

[0072] It should be noted that the above-mentioned "elastic block 224" is one of the areas of the "plug body 22", that is, the elastic block 224 is a part of the plug body 22, that is, it is an integrated arrangement. Since the elastic block 224 is obviously elastic and the material is obviously different from that of other parts of the plug body 22, it can be manufactured by a two-color injection molding process. In this application, for the sake of ease of understanding, the part where the elastic block 224 is located is separated from the other parts of the plug body 22 by a line for illustration; in addition, since the above-mentioned "elastic block 224" is obviously elastic and can be deformed, the first limiting portion 81 and the second limiting portion 2243 may be elastic or not, and whether they are elastic or not will not affect the snap connection between the drive shaft 8 and the connecting portion 4.

[0073] See attached Fig.10 and attached Fig.16 On the basis of “the rod portion 2 is composed of a rod body 21 and a plug body 22, the connecting portion 4 is arranged on the plug body 22, the connecting portion 4 is a narrow and long groove structure and an elastic block 224 is arranged inside”, in order to ensure the closedness of the cavity 2a, the following design is carried out in this embodiment. Specifically, the elastic block 224 is a closed structure, which is used to close one side of the connecting portion 4, thereby preventing the liquid in the cavity 2a from leaking from the elastic block 224.

[0074] See attached Figure 5 , Attachment Fig.13 and attached Fig. 20 There are many structures that can be snap-connected. The following design is carried out in this embodiment. Specifically, the second limiting portion 2243 is a tooth-shaped structure, and the first limiting portion 81 is provided with a tooth groove structure corresponding to the tooth-shaped structure.

[0075] See attached Figure 7 , Attachment Fig.10 , Attachment Fig.11 and attached Fig.13 , or see the attached Figure 7 , Attachment Fig.16 , Attachment Fig.17 and attached Fig. 20 Based on the above scheme, the following design is carried out in this embodiment. Specifically, a first elastic reinforcement area 2241 composed of a soft elastic material is provided on both sides of the second limiting portion 2243 on the elastic block 224. The elasticity of the first elastic reinforcement area 2241 is greater than the elasticity of the second limiting portion 2243. For example, the first elastic reinforcement area 2241 is made of a soft elastic material, and the second limiting portion 2243 is made of a deformable hard material.

[0076] Through the design of the above structure, the second limiting portion 2243 will be hindered by the first elastic enhancement area 2241 during the deformation process, thereby indirectly enhancing the elastic deformation ability of the second limiting portion 2243, so that the second limiting portion 2243 generates a greater elastic force when the deformation amount is the same, and the connection between the second limiting portion 2243 and the first limiting portion 81 is more stable and firm.

[0077] See attached Figure 7 Furthermore, the following design is also carried out in this embodiment. Specifically, a second elastic reinforcement area 2242 made of soft elastic material is provided on the side of the elastic block 224 away from the second limiting portion 2243. After the rod body 21 and the plug body 22 are connected, the second elastic reinforcement area 2242 can abut and press against the inner wall of the rod body 21.

[0078] Based on the above scheme, since the drive shaft 8 and the connecting part 4 can be cantilevered and snap-connected through the cooperation of the first limiting part 81 and the second limiting part 2243, no matter whether the second limiting part 2243 is a groove structure or a convex structure, during the connection between the drive shaft 8 and the connecting part 4, the second limiting part 2243 will be offset or deformed in the direction away from the first limiting part 81 until the second limiting part 2243 is snapped into the first limiting part 81; and the second elastic enhanced area 2242 will be elastically deformed in the direction close to the first limiting part 81 under the extrusion of the inner wall of the rod body 21, and press the second limiting part 2243, so that the second limiting part 2243 will be hindered when deforming in the direction away from the first limiting part 81, thereby further enhancing the elastic deformation ability of the second limiting part 2243, so that the second limiting part 2243 generates a larger elastic force when the deformation amount is the same, so that the first limiting part 81 and the second limiting part 2243 are less likely to separate from each other after snapping.

[0079] See attached Figure 1 and attached Figure 3 The embodiment of the present invention further discloses an electric toothbrush, including an electric toothbrush head and a brush handle 7 , the brush handle 7 is provided with a driving shaft 8 , and the electric toothbrush head is connected to the driving shaft 8 .

[0080] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0081] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0082] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric toothbrush head, characterized in that: It comprises a head for connecting bristles and a rod extending from the head, a cavity is provided inside the rod, a water inlet connected to the cavity and a connecting part not connected to the cavity are provided outside the rod, the water inlet can be connected to an oral irrigator, the connecting part can be connected to the handle of an electric toothbrush, so that the electric toothbrush head can be connected to the oral irrigator and the handle of the electric toothbrush separately or simultaneously, and a nozzle connected to the cavity is provided on the head, so that the liquid in the oral irrigator can flow through the water inlet, the cavity and the nozzle in sequence.

2. An electric toothbrush head according to claim 1, characterized in that: The rod portion comprises: A rod body, one end of which is connected to the head, and the cavity is arranged inside the rod body and is open at one end away from the head; A plug body is detachably connected to an end of the rod body away from the head and is used to close the cavity.

3. An electric toothbrush head according to claim 2, characterized in that: The inner wall of the rod body is provided with a basically annular groove, and the plug body is provided with a basically annular protrusion corresponding to the groove. At least one of the rod body, the plug body and the protrusion is elastic. The rod body and the plug body can be snap-connected through the cooperation of the groove and the protrusion to close the bottom of the cavity.

4. An electric toothbrush head according to claim 2, characterized in that: A sealing colloid is filled between the rod body and the plug body to enhance the sealing property of the cavity.

5. The electric toothbrush head according to claim 2, characterized in that: The water injection port is arranged on the rod body.

6. An electric toothbrush head according to claim 2, characterized in that: The water injection port is arranged on the plug body.

7. An electric toothbrush head according to claim 3, characterized in that: A limit groove and a positioning groove are provided inside the rod body, and a limit piece corresponding to the limit groove and a positioning piece corresponding to the positioning groove are provided on the plug body. After the rod body and the plug body are connected, the limit piece can be inserted into the limit groove to prevent the rod body and the plug body from rotating relative to each other, and the positioning piece can be inserted into the positioning groove to prevent the rod body and the plug body from shaking and misaligning relative to each other.

8. The electric toothbrush head according to claim 2, characterized in that: The connecting part is arranged on the plug body, and the connecting part is a narrow and long groove structure and an elastic block is arranged inside. The elastic block is provided with a second limiting part. The electric toothbrush includes a brush handle with a driving shaft, and the driving shaft is provided with a first limiting part corresponding to the second limiting part. The driving shaft can be inserted into the connecting part and a cantilever snap connection is performed through the cooperation of the first limiting part and the second limiting part.

9. An electric toothbrush head according to claim 8, characterized in that: After the connecting portion is connected to the driving shaft, there is a distance between an end of the electric toothbrush head close to the brush handle and an end of the brush handle close to the electric toothbrush head.

10. The electric toothbrush head according to claim 8, characterized in that: The elastic block is a closed structure, which is used to close one side of the connecting portion to prevent liquid from leaking from the elastic block.

11. The electric toothbrush head according to claim 8, characterized in that: The second limiting portion is a tooth-shaped structure, and the first limiting portion is provided with a tooth groove structure corresponding to the tooth-shaped structure.

12. The electric toothbrush head according to claim 8, characterized in that: The second limiting portion is made of a deformable hard material, and the elastic block is provided with first elastic enhancement areas made of a soft elastic material on both sides of the second limiting portion, for enhancing the elastic deformation capability of the second limiting portion.

13. The electric toothbrush head according to claim 8, characterized in that: A second elastic enhancement area made of soft elastic material is provided on the side of the elastic block away from the second limiting portion. After the rod body and the plug body are connected, the second elastic enhancement area can abut and press against the inner wall of the rod body to further enhance the elastic deformation capacity of the second limiting portion.

14. An electric toothbrush, comprising the electric toothbrush head according to any one of claims 1 to 13, characterized in that: It also includes a brush handle, on which a driving shaft is provided, and the electric toothbrush head is connected to the driving shaft.

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