Toothbrush head and electric toothbrush

Abstract

The invention relates to the technical field of electric toothbrushes, in particular to an electric toothbrush head and an electric toothbrush. The toothbrush head comprises a brush rod, bristles are arranged at one end of the brush rod, a containing cavity is formed in the other end of the brush rod, an inner fastener is integrally formed in the containing cavity, and an insertion cavity is formed in the inner fastener and used for inserting a vibration machine core on a handle into the insertion cavity. The end, provided with the bristles, of the brush rod is further provided with a protective layer, and the protective layer and the inner fastener are both made of elastic materials. By adopting the mode, the noise generated by vibration can be reduced, and the strength and impact force for bumping teeth are reduced, so that the experience feeling during use is improved.

Description

Technical Field

[0001] The 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 the quality of life, electric toothbrushes have been vigorously promoted in the market. Electric toothbrushes use the rapid rotation or vibration of the vibration movement to make the toothbrush head on the electric toothbrush produce high-frequency vibrations, instantly breaking down the toothpaste into fine foam and deeply cleaning the gaps between teeth. At the same time, the vibration of the bristles can promote blood circulation in the oral cavity and have a massage effect on the gum tissue.

[0003] The toothbrush head includes a brush rod and a socket. The bristles are arranged on the brush rod. The socket is located at one end of the brush rod. A movement channel is arranged in the socket. The vibration movement is inserted into the movement channel. The vibration movement abuts against the movement channel. The high-frequency vibration of the vibration movement drives the bristles on the electric toothbrush head to vibrate, so as to realize the effect of brushing teeth with the bristles.

[0004] However, in actual use, there is usually a lot of vibration noise. The brush rod will hit the teeth during the vibration transmission process, causing discomfort such as soreness and numbness, affecting the user experience. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a toothbrush head and an electric toothbrush that can reduce the noise generated by vibration and reduce the force and impact of knocking teeth, so as to improve the experience during use.

[0006] The present invention discloses a toothbrush head, comprising: a brush rod, one end of which is provided with bristles, the other end of which is formed with a receiving cavity, an inner fastener is integrally formed in the receiving cavity, an insertion cavity is formed in the inner fastener for inserting a vibration mechanism on a handle into the insertion cavity, a protective layer is also provided at one end of the brush rod where the bristles are provided, and the protective layer and the inner fastener are both made of elastic material.

[0007] Optionally, the protective layer and the inner fastener are made of thermoplastic elastomer.

[0008] Optionally, a through hole communicating with the accommodating cavity is provided on the brush rod, the internal fastener includes a plug-in body, and a stop portion connected to one end of the plug-in body, the plug-in body and the inner wall of the accommodating cavity are integrally injection molded, and the stop portion is located in the through hole, and the insertion cavity is located in the plug-in body.

[0009] Optionally, an inner wall of the insertion cavity is provided with an axially extending exhaust groove, the exhaust groove extends to the entrance of the insertion cavity, and the entrance of the insertion cavity is flush with the end of the brush rod.

[0010] Optionally, an outer ring of the plug-in body is provided with an annular protrusion, an inner wall of the accommodating cavity is formed with an annular groove, and the annular protrusion is clamped in the annular groove.

[0011] Optionally, a limiting protrusion is further formed in the insertion cavity, and the limiting protrusion is used to limit the vibration movement.

[0012] Optionally, a recessed portion is formed at one end of the brush rod where the bristles are arranged, the protective layer is wrapped around the outer circle of the recessed portion, and the protective layer smoothly transitions to the outer surface of the brush rod.

[0013] Optionally, a receiving groove is further formed on the brush rod, a hair-planting sheet is arranged in the receiving groove, and the bristles are connected to the brush rod through the hair-planting sheet.

[0014] Optionally, a counterweight block and a flexible cushion layer are further disposed in the accommodating groove, the flexible cushion layer is located at the bottom of the accommodating groove, and the counterweight block is disposed between the flexible cushion layer and the hair implanting sheet.

[0015] The present invention also discloses an electric toothbrush, comprising a brush handle and a toothbrush head as described in any one of the above, wherein the toothbrush head is detachably connected to the brush handle.

[0016] Compared with the prior art, the toothbrush head and electric toothbrush provided by the embodiments of the present invention have the beneficial effect that: the toothbrush head is used to clean teeth by arranging bristles at one end of the brush rod. There is a accommodating cavity at the other end, and an internal fastener is integrally formed in the accommodating cavity. An insertion cavity is formed inside the internal fastener, and the purpose is to insert the vibration movement on the handle into the insertion cavity to achieve power transmission. At the same time, a protective layer is also provided at one end of the brush rod where the bristles are provided. The protective layer made of elastic material can reduce the hard collision with the teeth during the vibration transmission of the brush rod, thereby reducing the force and impact of knocking the teeth, so as to reduce the discomfort caused by soreness, numbness, etc., and improve the user experience. In addition, the elastic internal fastener can buffer the vibration generated by the vibration movement when it is working to a certain extent, reduce the vibration noise, and make the electric toothbrush run more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1 is a schematic structural diagram of a toothbrush head provided by an embodiment of the present invention;

[0019] Figure 2 is a cross-sectional schematic diagram of a toothbrush head provided by an embodiment of the present invention;

[0020] Figure 3is a cross-sectional schematic diagram of an inner fastener provided by an embodiment of the present invention;

[0021] Figure 4 It is an exploded schematic diagram of a toothbrush head provided in an embodiment of the present invention.

[0022] The reference numerals in the figures are:

[0023] 100, toothbrush head; 110, brush rod; 112, accommodating cavity; 1122, annular groove; 114, through hole; 116, recessed portion; 118, accommodating groove; 120, bristles; 130, inner fastener; 132, insertion cavity; 1322, exhaust groove; 1324, limiting protrusion; 134, plug-in body; 1342, annular protrusion; 136, stopper; 140, protective layer; 150, hair planting sheet; 160, counterweight block; 170, flexible cushion layer. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention are described in detail.

[0025] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a toothbrush head 100, including: a brush rod 110, one end of the brush rod 110 is provided with bristles 120, the other end of the brush rod 110 is formed with a receiving cavity 112, the receiving cavity 112 is provided with an inner fastener 130 integrally formed therein, the inner fastener 130 is formed with an insertion cavity 132, which is used to insert the vibration movement on the handle into the insertion cavity 132, and the end of the brush rod 110 provided with the bristles 120 is also provided with a protective layer 140, and the protective layer 140 and the inner fastener 130 are both made of elastic material.

[0026] Specifically, the toothbrush head 100 is used to clean teeth by arranging bristles 120 at one end of the brush rod 110. There is a accommodating cavity 112 at the other end, and an internal fastener 130 is integrally formed in the accommodating cavity 112. An insertion cavity 132 is formed inside the internal fastener 130, and the purpose is to insert the vibration movement on the handle into the insertion cavity 132 to achieve power transmission. At the same time, a protective layer 140 is also arranged at the end of the brush rod 110 where the bristles 120 are arranged. The protective layer 140 made of elastic material can reduce the hard collision with the teeth during the vibration transmission process of the brush rod 110, thereby reducing the force and impact of knocking the teeth, so as to reduce the discomfort caused by soreness, numbness and other discomforts, and improve the user experience. In addition, the elastic internal fastener 130 can buffer the vibration generated by the vibration movement when it is working to a certain extent, reduce the vibration noise, and make the electric toothbrush run more smoothly.

[0027] In an optional embodiment of the present application, the protective layer 140 and the inner fastener 130 are made of thermoplastic elastomer (TPE).

[0028] Specifically, thermoplastic elastomers are usually copolymers formed by connecting two or more polymer segments of different properties through chemical bonds. Among them, one segment has the elasticity of rubber and is called a soft segment; the other segment has the rigidity and thermal stability of plastic and is called a hard segment. The soft segment gives the material elasticity and flexibility, while the hard segment provides strength, hardness and processing performance. This special microstructure makes the thermoplastic elastomer exhibit rubber-like elasticity at room temperature, which is conducive to meeting the current application environment. The protective layer 140 and the inner fastener 130 made of thermoplastic elastomer can better play the elastic buffering role, extend the service life, and facilitate production and processing, reducing production costs. In actual applications, different types of thermoplastic elastomers can be selected according to needs, such as: styrene (SBS, SIS, SEBS, SEPS), olefins (TPO, TPV), dienes (TPB, TPI), vinyl chloride (TPVC, TCPE), urethane (TPU), esters (TPEE), amides (TPAE), organic fluorine (TPF), silicones and ethylenes, etc.

[0029] like Figure 2 As shown, a through hole 114 communicating with the accommodating cavity 112 is provided on the brush rod 110, and the internal fastener 130 includes a plug-in body 134 and a stopper 136 connected to one end of the plug-in body 134, the plug-in body 134 and the inner wall of the accommodating cavity 112 are integrally injection molded, and the stopper 136 is located in the through hole 114, and the insertion cavity 132 is located in the plug-in body 134.

[0030] Specifically, the one-piece injection molding connection method enhances the connection strength between the inner fastener 130 and the brush rod 110, and the stopper 136 located in the through hole 114 further prevents the inner fastener 130 from moving in the accommodating cavity 112, thereby ensuring the stability of the vibration movement after insertion, thereby more effectively transmitting vibration, and is also beneficial to improving the overall reliability of the electric toothbrush.

[0031] like Figure 2 and Figure 3 As shown, the inner wall of the insertion cavity 132 is provided with an axially extending exhaust groove 1322 , which extends to the entrance of the insertion cavity 132 , and the entrance of the insertion cavity 132 is flush with the end of the brush rod 110 .

[0032] Specifically, the provision of the exhaust groove 1322 can avoid the large resistance caused by the inability to exhaust the air in the insertion cavity 132 when inserting the vibration core, so that the vibration core can be inserted more smoothly. At the same time, it also helps to reduce abnormal vibration and noise that may be generated by air accumulation, and improve the performance of the electric toothbrush. In addition, the entrance of the insertion cavity 132 is flush with the end of the brush rod 110, which can prevent the inner fastener 130 from bulging outward, and the brush rod 110 can protect the inner fastener 130.

[0033] It should also be noted that the insertion cavity 132 cooperates with the receiving cavity 112 of the brush rod 110, and combined with the material properties of the inner fastener 130 itself, it is beneficial to increase the number of plugging and unplugging times and improve the service life. Due to the elasticity and softness of the inner fastener 130 itself, compared with conventional hard plastic (PP, POM, or ABS and other materials), there is no problem of plastic deformation and wear after multiple extrusions and fits, which is beneficial to ensure the reliability of fit and improve user experience.

[0034] like Figure 4 As shown, the outer ring of the plug-in body 134 is provided with an annular protrusion 1342 , and the inner wall of the accommodating cavity 112 is formed with an annular groove 1122 , and the annular protrusion 1342 is clamped in the annular groove 1122 .

[0035] Specifically, the cooperation between the annular protrusion 1342 and the annular groove 1122 increases the tightness and firmness of the connection between the plug-in body 134 and the accommodating chamber 112, prevents the plug-in body 134 from relatively rotating or axially moving in the accommodating chamber 112, ensures the stability of power transmission when the vibration movement is working, and improves the overall performance of the electric toothbrush. In addition, the cooperation between the annular protrusion 1342 and the annular groove 1122 makes the connection between the plug-in body 134 and the brush rod 110 higher, reducing the risk of delamination and separation between the plug-in body 134 and the brush rod 110 during use.

[0036] like Figure 3 As shown, a limiting protrusion 1324 is also formed in the insertion cavity 132, and the limiting protrusion 1324 is used to limit the vibration movement.

[0037] Specifically, the presence of the limiting protrusion 1324 can accurately define the insertion position of the vibration movement, prevent the vibration movement from shifting or shaking in the insertion cavity 132, ensure the accuracy and stability of the power transmission between the vibration movement and the brush rod 110, and avoid problems such as uneven vibration transmission or increased noise caused by improper position of the vibration movement. It can also ensure stable cooperation with the vibration movement to avoid dislocation or falling off due to vibration during use. In addition, since the inner fastener 130 is made of elastic material, the vibration movement has a certain fault tolerance when cooperating with the insertion cavity 132. Regardless of whether the user inserts it in a specific direction, it will not affect the normal insertion and use, and there is no need to deliberately set up a fool-proof structure to prevent users from inserting it incorrectly like the traditional cooperation form.

[0038] like Figure 4 As shown, a concave portion 116 is formed at one end of the brush rod 110 where the bristles 120 are arranged, and a protective layer 140 is wrapped around the outer circle of the concave portion 116 , and the protective layer 140 and the outer surface of the brush rod 110 have a smooth transition.

[0039] Specifically, the design of the recessed portion 116 provides installation space for the protective layer 140, so that the protective layer 140 can be better wrapped on the brush rod 110, thereby enhancing the stability of the protective layer 140. The smoothly transitional outer surface can reduce the friction and irritation to the internal oral tissues when brushing teeth, improve the user's comfort, and also help maintain oral hygiene and avoid dirt accumulation at the joints. In addition, while avoiding hard collisions with teeth, the protective layer 140 can also protect the toothbrush head 100 and prevent it from bursting during use, which is conducive to improving safety during use.

[0040] like Figure 4 As shown, a receiving groove 118 is further formed on the brush rod 110 , and a hair-planting piece 150 is disposed in the receiving groove 118 , and the bristles 120 are connected to the brush rod 110 via the hair-planting piece 150 .

[0041] Specifically, the bristles 120 are connected by the bristle-planting sheet 150, so that the installation of the bristles 120 is more convenient and firm. When the bristles 120 are connected to the brush rod 110, the bristle-planting sheet 150 can directly form a required connection relationship with the brush rod 110, which is conducive to improving production efficiency. In addition, the arrangement of the bristle-planting sheet 150 can also make the arrangement of the bristles 120 more neat, thereby improving the cleaning effect.

[0042] like Figure 4 As shown, a counterweight block 160 and a flexible pad layer 170 are further disposed in the receiving groove 118 . The flexible pad layer 170 is located at the bottom of the receiving groove 118 , and the counterweight block 160 is disposed between the flexible pad layer 170 and the hair implantation sheet 150 .

[0043] Specifically, the setting of the counterweight 160 can optimize the center of gravity distribution of the toothbrush head 100, making the brushing feel more comfortable and the operation more flexible. The flexible cushion layer 170 can buffer the vibration generated by the bristles 120 during operation, reduce the impact on the brush rod 110 and the oral cavity, further reduce vibration noise and discomfort, and improve the user experience.

[0044] The present invention also discloses an electric toothbrush, comprising a brush handle and the toothbrush head 100 in the aforementioned embodiment, wherein the toothbrush head 100 is detachably connected to the brush handle. The electric toothbrush comprises the same structure and beneficial effects as the toothbrush head 100 in the aforementioned embodiment. The structure and beneficial effects of the toothbrush head 100 have been described in detail in the aforementioned embodiment and will not be repeated here.

[0045] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A toothbrush head, characterized in that: include: A brush rod, one end of which is provided with bristles, and the other end of which is formed with a receiving cavity, an inner fastener is integrally formed in the receiving cavity, an insertion cavity is formed in the inner fastener, and is used to insert the vibration movement on the handle into the insertion cavity, and a protective layer is also provided at the end of the brush rod where the bristles are provided, and the protective layer and the inner fastener are both made of elastic material.

2. The toothbrush head according to claim 1, characterized in that: The protective layer and the inner fastener are made of thermoplastic elastomer.

3. The toothbrush head according to claim 2, characterized in that: The brush rod is provided with a through hole connected to the accommodating cavity, the inner fastener includes a plug-in body and a stopper connected to one end of the plug-in body, the plug-in body and the inner wall of the accommodating cavity are integrally injection molded, and the stopper is located in the through hole, and the insertion cavity is located in the plug-in body.

4. The toothbrush head according to claim 3, characterized in that: The inner wall of the insertion cavity is provided with an exhaust groove extending in the axial direction, the exhaust groove extends to the entrance of the insertion cavity, and the entrance of the insertion cavity is flush with the end of the brush rod.

5. The toothbrush head according to claim 4, characterized in that: The outer ring of the plug-in body is provided with an annular protrusion, the inner wall of the accommodating cavity is formed with an annular groove, and the annular protrusion is clamped in the annular groove.

6. The toothbrush head according to any one of claims 1 to 5, characterized in that: A limiting convex is also formed in the insertion cavity, and the limiting convex is used to limit the vibration movement.

7. The toothbrush head according to any one of claims 1 to 5, characterized in that: A concave portion is formed at one end of the brush rod where the bristles are arranged, the protective layer is wrapped around the outer circle of the concave portion, and the protective layer smoothly transitions to the outer surface of the brush rod.

8. The toothbrush head according to claim 7, characterized in that: The brush rod is also formed with a receiving groove, a hair-planting sheet is arranged in the receiving groove, and the bristles are connected to the brush rod through the hair-planting sheet.

9. The toothbrush head according to claim 8, characterized in that A counterweight block and a flexible cushion layer are also arranged in the accommodating groove. The flexible cushion layer is located at the bottom of the accommodating groove, and the counterweight block is arranged between the flexible cushion layer and the hair implanting sheet.

10. An electric toothbrush, characterized in that: It comprises a brush handle and a toothbrush head according to any one of claims 1 to 9, wherein the toothbrush head is detachably connected to the brush handle.

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