An electric toothbrush

Abstract

The present invention discloses an electric toothbrush, comprising a toothbrush head body, a toothbrush handle, a transmission rod with a cavity and a micro motor, wherein the transmission rod is assembled inside the toothbrush head body, and the cavity of the transmission rod is provided with a micro motor, the micro motor can drive the toothbrush head body through the transmission rod and resonate with acoustic waves, a bracket is installed inside the toothbrush handle, an electric control component for controlling the micro motor is installed on the bracket, and the bracket is connected to the transmission rod, and a soft connection layer is provided between the outer wall of the transmission rod and the inner wall of the toothbrush handle. The present invention solves the technical problems in the prior art that the transmission rod of the electric toothbrush is inconvenient to assemble, the sealing and shock absorption are insufficient when matched with the toothbrush handle and the cavity, and the micro motor is unstable when vibrating.

Description

Technical Field

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

[0002] Electric toothbrushes are the most commonly used tooth cleaning appliances for people. They are used to remove bacteria, plaque and small debris attached to the teeth. They can prevent periodontal diseases and protect people's oral hygiene and dental health. There are many kinds of electric toothbrushes on the market now, with different structures, but there are some problems. The vibration of the micro motor has a great influence on the handle, affecting people's use. At the same time, the transmission rod in the existing electric toothbrush is not convenient to assemble with the toothbrush head and toothbrush handle, and the sealing is not enough.

[0003] The invention with authorization announcement number: CN 101856275 B discloses a sonic vibration structure of an electric toothbrush, including a transmission rod capable of vibration transmission and a vibration source micromotor capable of generating resonance output, wherein the transmission rod is assembled in a cavity at the neck of a toothbrush head body, the micromotor is arranged in the inner cavity of the transmission rod and close to the toothbrush head body, the micromotor can drive and sonic resonate the toothbrush head body through the transmission rod, and the rear end of the transmission rod is connected to a bracket in the handle; this patent only lacks support for the micromotor and cannot guarantee stability during vibration. Summary of the invention

[0004] The purpose of the present invention is to provide an electric toothbrush, which solves the technical problems in the prior art that the electric toothbrush transmission rod is inconvenient to assemble, the sealing and shock absorption are insufficient when matched with the toothbrush handle and cavity, and the micro motor is unstable when vibrating.

[0005] An electric toothbrush comprises a toothbrush head body, a toothbrush handle, a transmission rod with a cavity and a micro motor, wherein the transmission rod is assembled inside the toothbrush head body, and a micro motor is arranged inside the cavity of the transmission rod, and the micro motor can be driven by the transmission rod and resonate with acoustic waves to the toothbrush head body, a bracket is installed inside the toothbrush handle, an electric control component for controlling the micro motor is installed on the bracket, and the bracket is connected to the transmission rod, and a soft connection layer is arranged between the outer wall of the transmission rod and the inner wall of the toothbrush handle.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows:

[0007] Furthermore, a first engaging rib is provided on the outer side of the transmission rod, and a first engaging groove is provided on the inner wall of the toothbrush head body corresponding to the first engaging rib, and the first engaging rib cooperates with the first engaging groove. The beneficial effect of adopting this step is that the engaging rib and the engaging groove cooperate with each other, so that the toothbrush head body and the transmission rod can be engaged, and it is also convenient for disassembly of the toothbrush head body.

[0008] Furthermore, a second engaging groove is circumferentially provided at the bottom of the transmission rod, and a second engaging rib is provided at the upper end of the bracket, and the second engaging rib cooperates with the second engaging groove. The beneficial effect of adopting this step is that the transmission rod and the bracket cooperate with each other to complete the assembly and ensure the stability of the structure.

[0009] Furthermore, a third engaging rib is provided at the bottom of the bracket, and a third engaging groove is provided on the inner wall of the toothbrush handle corresponding to the third engaging rib, and the third engaging rib cooperates with the third engaging groove. The beneficial effect of adopting this step is that the bracket as a whole is engaged and installed with the toothbrush handle, wherein the bracket and the toothbrush handle are of equal length, and the bracket can facilitate the installation of other assembly parts.

[0010] Furthermore, the soft connection layer is an injection molding layer, and the injection molding layer is located between the second engaging groove and the first engaging rib. The beneficial effect of adopting this step is that the injection molding layer can achieve sound elimination, shock absorption and waterproofing between the transmission rod and the toothbrush handle shell.

[0011] Furthermore, it also includes a first movable buckle, which is mounted on the second locking rib and is located inside the cavity. The first movable buckle is a stepped cylindrical shape. The beneficial effect of this step is that the vibration of the bracket can be reduced through the first movable buckle.

[0012] Furthermore, the soft connection layer is a shock-absorbing soft rubber pad layer, the shock-absorbing soft rubber pad layer is located below the first clamping rib, and the shock-absorbing soft rubber pad layer wraps the second clamping groove.

[0013] Furthermore, it also includes a second movable buckle, which is mounted on the second clamping rib and is located inside the cavity. One side of the second movable buckle is a square raised surface, and the other side is an arc-shaped raised surface.

[0014] Furthermore, the inner wall of the cavity is provided with a plurality of limiting protrusions at intervals along the circumferential direction, and the limiting protrusions are located below the micro motor. The beneficial effect of adopting this step is that the limiting protrusions can play a limiting role for the micro motor, thus ensuring the stability of the micro motor during vibration.

[0015] Furthermore, two first limit grooves are provided at intervals along the circumferential direction at the bottom of the transmission rod, and two first limit blocks are provided along the circumferential direction on the inner wall of the toothbrush handle, and the first limit blocks correspond to the first limit grooves. The beneficial effect of adopting this step is that the limit grooves and the limit blocks cooperate with each other, so that the vibration direction of the transmission rod can be limited.

[0016] Furthermore, two second limit blocks are circumferentially spaced apart above the bracket, and two second limit grooves are circumferentially arranged on the inner wall of the toothbrush handle, and the second limit blocks correspond to the second limit grooves. The beneficial effect of adopting this step is that the vibration direction of the transmission rod is limited by the mutual cooperation of the limit blocks and the limit grooves.

[0017] Furthermore, the electronic control component includes a circuit board, a battery and a charging base, the charging base is installed at the bottom of the toothbrush handle, the circuit board and the battery are respectively installed on both sides of the bracket, and the circuit board is electrically connected to the battery, and the battery is installed on the charging base and charged by magnetic field induction.

[0018] Furthermore, the toothbrush handle consists of a first handle portion and a second handle portion which are detachably connected.

[0019] Beneficial effects of the present invention:

[0020] 1. The present invention provides an electric toothbrush, in which a micro motor installed inside the toothbrush head body is used as a vibration source, and a limiting protrusion is set in the cavity to support the micro motor, which can play a role in shock absorption and noise reduction, thereby improving the stability of the toothbrush structure.

[0021] 2. The soft connection layer in the present invention can be an injection molding layer or a shock-absorbing soft rubber cushion layer, which is arranged between the outer wall of the transmission rod and the inner wall of the toothbrush handle, so as to achieve the effects of noise reduction, waterproofing and shock absorption.

[0022] 3. In the present invention, an active buckle is added in the cavity of the transmission rod, which can play a role in noise reduction and shock absorption. After the transmission rod and other components are installed, it can be convenient to disassemble, install and position.

[0023] 4. The present invention has two limit grooves along the circumference of the bottom of the transmission rod, which can limit the rotation direction of the transmission rod and improve the brushing effect; the present invention can also set a limit block on the bracket, and the bracket is connected to the transmission rod, so that the vibration direction of the transmission rod can be limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 An exploded view of an electric toothbrush according to a specific embodiment 1 of the present invention;

[0026] Figure 2 It is a schematic diagram of a transmission rod portion of an electric toothbrush according to a specific embodiment 1 of the present invention;

[0027] Figure 3 A cross-sectional view of a toothbrush handle of an electric toothbrush according to a specific embodiment 1 of the present invention;

[0028] Figure 4 A front view of a toothbrush handle of an electric toothbrush according to a specific embodiment 1 of the present invention;

[0029] Figure 5 An exploded view of a toothbrush handle of an electric toothbrush according to a specific embodiment 2 of the present invention;

[0030] Figure 6 It is a schematic diagram of a transmission rod portion of an electric toothbrush according to a specific embodiment 2 of the present invention;

[0031] Figure 7 A cross-sectional view of a first handle portion of a toothbrush handle of an electric toothbrush according to a specific embodiment 2 of the present invention;

[0032] Figure 8 A schematic diagram of a bracket of a toothbrush handle of an electric toothbrush according to a specific embodiment 2 of the present invention;

[0033] Fig. 9 A cross-sectional view of a toothbrush handle of an electric toothbrush according to a specific embodiment 2 of the present invention;

[0034] Reference numerals:

[0035] 1-toothbrush head body; 2-toothbrush handle; 3-cavity; 4-transmission rod; 5-micro motor; 6-bracket; 7-electric control component; 8-soft connection layer; 9-rubber ring;

[0036] 201-first handle portion; 202-second handle portion;

[0037] 301-limiting protrusion;

[0038] 401-first engaging rib; 402-first engaging groove; 403-second engaging groove; 404-second engaging rib; 405-first movable buckle; 406-first limiting groove; 407-first limiting block; 408-second movable buckle;

[0039] 601-third engaging rib; 602-third engaging groove; 603-second limiting block; 604-second limiting groove;

[0040] 701-circuit board, 702-battery; 703-charging base;

[0041] 801-injection molding layer; 802-shock-absorbing soft rubber cushion layer. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0043] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0044] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "top", "bottom", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined;

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Embodiment 1:

[0048] like Figure 1 As shown, an electric toothbrush provided by the present invention comprises a toothbrush head body 1, a toothbrush handle 2, a transmission rod 4 with a cavity 3 and a micro motor 5, wherein the transmission rod 4 is assembled inside the toothbrush head body 1, and a micro motor is arranged inside the cavity 3 of the transmission rod 4; the micro motor in the present invention serves as a vibration source to drive the transmission rod to vibrate, thereby realizing the brushing function of the electric toothbrush, and the position of the micro motor 5 in the cavity 3 is not limited in the present invention. The preferred solution is that the micro motor 5 is at 3 / 4 of the height of the cavity, so that the vibration of the toothbrush handle can be minimized, and at the same time, a rubber ring 9 is arranged between the toothbrush head body 1 and the toothbrush handle 2.

[0049] In this embodiment, a bracket 6 is installed inside the toothbrush handle 2, and an electric control component 7 for controlling the micro motor 5 is installed on the bracket 6, and the bracket 6 is connected to the transmission rod 4, and a soft connection layer 8 is arranged between the outer wall of the transmission rod 4 and the inner wall of the toothbrush handle 2; the bracket 6 in this embodiment is equal in length to the toothbrush handle 2, and the bottom of the bracket 6 is connected to the inner wall of the toothbrush handle 2, which can ensure the stability of the bracket 6, and the bracket 6 can be used to assemble the electric control component 7, thereby improving the stability of the electric control component 7; the soft connection layer 8 is arranged between the transmission rod 4 and the toothbrush handle 2, which can effectively prevent water from entering the toothbrush handle 2, thereby extending the service life.

[0050] like Figure 1 As shown, there is a snap-fit ​​structure between the transmission rod 4 and the toothbrush head body 1, and the specific structure is as follows Figure 2 As shown, a first engaging rib 401 is provided on the outer side of the transmission rod 4, and a first engaging groove 402 is provided on the inner wall of the toothbrush head body 1 corresponding to the first engaging rib 401. The first engaging rib 401 cooperates with the first engaging groove 402. The first engaging rib 401 in this embodiment is T-shaped, and the outer surface is an inclined surface, so that when the first engaging rib 401 and the first engaging groove 402 are assembled, a certain self-locking can be formed, and it is also easy to disassemble, so that the toothbrush head body 1 can also be detachable.

[0051] like Figure 1 As shown, the bottom of the transmission rod 4 is provided with a second engaging groove 403 along the circumferential direction, and the upper end of the bracket 6 is provided with a second engaging rib 404, and the second engaging rib 404 cooperates with the second engaging groove 403 to complete the assembly. In this embodiment, the transmission rod 4 vibrates under the drive of the micro motor 5, and the bottom needs to be supported so that the vibration of the transmission rod 4 can be stable. In this embodiment, the bracket 6 and the transmission rod 4 are engaged, so that Figure 3 It can be seen that the second engaging rib 404 in this embodiment is a U-shaped through groove in the middle, with raised engaging ribs on both sides. The through groove is used to provide telescopic capacity, which facilitates the loading and unloading of the transmission rod 4. During assembly, the raised part of the second engaging rib 404 is clamped in the second engaging groove 403 to complete the assembly.

[0052] like Figure 1-2 As shown, when the transmission rod 4 vibrates, a first movable buckle 405 can also be mounted on the second engaging rib 404. The first movable buckle 405 is located inside the cavity. The movable buckle 405 is a step-type. When mounted on the second engaging rib 404, it can reduce the vibration at the handle and also play a role in noise reduction.

[0053] like Figure 1As shown, the bottom of the bracket 6 is provided with a third engaging rib 601, and the inner wall of the toothbrush handle 2 is provided with a third engaging groove 602 corresponding to the third engaging rib 601. The third engaging rib 601 cooperates with the third engaging groove 602. Figure 5 It can be seen that the third engaging rib 601 is located at the bottom and engages with the toothbrush handle 2, so that the stability of the connection between the bracket 6 and the toothbrush handle 2 can be ensured.

[0054] like Figure 1 As shown, in this embodiment, the soft connection layer 8 is an injection molding layer 801, and the injection molding layer 801 is located between the second engaging groove 403 and the first engaging rib 401. The injection molding layer can achieve sound insulation, shock absorption and waterproofing between the transmission rod and the toothbrush handle shell; the injection molding layer 801 in this embodiment is different from the waterproof sealing ring in the prior art, because the sealing ring is basically point contact and cannot completely guarantee the sealing. The present invention uses an injection molding process to complete injection molding and fixing, which can ensure the sealing between the transmission rod and the toothbrush handle shell; and the injection molding layer 801 is small in size, which can ensure the streamlined design of the outer side of the toothbrush handle.

[0055] like Figure 1-2 As shown, in order to ensure the stability of the micro motor 5 after installation, a plurality of limiting protrusions 301 are arranged at intervals along the circumferential direction on the inner wall of the cavity 3, and the limiting protrusions 301 are located below the micro motor 5. The limiting protrusions 301 in this embodiment are wedge-shaped protrusions on the outer surface, which can play a role in supporting the micro motor 5; there are at least two limiting protrusions 301 in this embodiment.

[0056] like Figure 1 , 3 As shown, two first limit grooves 406 are provided at intervals along the circumferential direction at the bottom of the transmission rod 4, and two first limit blocks 407 are provided along the circumferential direction on the inner wall of the toothbrush handle 2, and the first limit blocks 407 correspond to the first limit grooves 406. In this embodiment, the first limit grooves 406 are rectangular grooves with relative positions, and the corresponding first limit blocks 407 are rectangular blocks. In this way, the cooperation between the limit blocks and the limit grooves limits the rotation of the transmission rod, so that the transmission rod can only swing left and right, thereby improving the brushing effect of the toothbrush.

[0057] like Figure 1 , 4As shown, the electronic control component 7 includes a circuit board 701, a battery 702 and a charging base 703, and the charging base 703 is installed at the bottom of the toothbrush handle 2, and the circuit board 701 and the battery 702 are respectively installed on both sides of the bracket 6, and the circuit board 701 is electrically connected to the battery 702, and the battery 702 is electrically connected to the charging base 703; in this embodiment, the front side of the bracket 6 is provided with a hook for clamping the circuit board 701, and the back side is a cylindrical cavity groove for placing the battery 702; the charging in this embodiment is performed by magnetic field induction charging, and the electronic control component 7 also includes other components, such as power cord, charging coil and other components, which are common knowledge and will not be repeated here.

[0058] Embodiment 2:

[0059] like Figure 5-6 As shown, the present invention also provides another embodiment, in which the soft connection layer 8 is a shock-absorbing soft rubber pad layer 802, and the shock-absorbing soft rubber pad layer 802 is located below the first locking rib 401, and the shock-absorbing soft rubber pad layer 802 wraps the second locking groove 403; this embodiment is different from the previous embodiment, and the shock-absorbing soft rubber pad layer 802 can play the role of sealing, sound absorption and shock absorption.

[0060] like Figure 5 As shown, this embodiment replaces the first movable buckle 405 with a second movable buckle 408, and the second movable buckle 408 is mounted on the second locking rib 404, and the second movable buckle 408 is located inside the cavity 3, one side of the second movable buckle 408 is a square raised surface, and the other side is an arc-shaped raised surface, one side of the inner hole of the second movable buckle 408 is a rectangular protrusion, and the other side is an arc, which is convenient for installation and positioning, and can also play a role in sound absorption and shock reduction.

[0061] like Figure 7-9 As shown, two second limit blocks 603 are arranged circumferentially above the bracket 6, and two second limit grooves 604 are arranged circumferentially on the inner wall of the toothbrush handle 2. The second limit blocks 603 correspond to the second limit grooves 604. The vibration direction of the transmission rod is limited by the mutual cooperation of the limit blocks and the limit grooves. Compared with Example 1, the limiting method is inconsistent.

[0062] The toothbrush handle 2 is composed of a first handle part 201 and a second handle part 202 which are detachably connected, and can be threaded or snap-fitted, so that it is easy to install and disassemble; the electric control component 7 in this embodiment does not have a charging stand, and directly uses batteries. After use, the batteries are replaced.

[0063] like Figure 7-8As shown, the outer side of the bracket 6 in this embodiment is provided with a fourth engaging rib 605, and the inner wall of the toothbrush handle 2 is provided with a fourth engaging groove 606. The fourth engaging rib 605 and the fourth engaging groove 606 cooperate with each other to complete the assembly of the bracket 6 and the toothbrush handle 2. Compared with Example 1, the fixing method of the bracket 6 is different, but the effect achieved is the same.

[0064] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An electric toothbrush, comprising a toothbrush head, a toothbrush handle, a transmission rod with a cavity and a micro motor, wherein the transmission rod is mounted inside the toothbrush head, and a micro motor is arranged inside the cavity of the transmission rod, and the micro motor can be driven by the transmission rod and resonate with the toothbrush head through acoustic waves, characterized in that: A bracket is installed inside the toothbrush handle, an electric control component for controlling the micro motor is installed on the bracket, and the bracket is connected to the transmission rod, and a soft connection layer is provided between the outer wall of the transmission rod and the inner wall of the toothbrush handle; A first engaging rib is disposed on the outer side of the transmission rod, a first engaging groove is formed on the inner wall of the toothbrush head body at a position corresponding to the first engaging rib, and the first engaging rib cooperates with the first engaging groove; A second engaging groove is formed at the bottom of the transmission rod along the circumferential direction, and a second engaging rib is provided at the upper end of the bracket, and the second engaging rib is matched with the second engaging groove; A third engaging rib is provided at the bottom of the bracket, a third engaging groove is provided at the inner wall of the toothbrush handle corresponding to the third engaging rib, and the third engaging rib cooperates with the third engaging groove; The soft connection layer is an injection molding layer or a shock-absorbing soft rubber cushion layer. When the soft connection layer is an injection molding layer, the injection molding layer is located between the second clamping groove and the first clamping rib. The electric toothbrush also includes a first movable buckle, which is sleeved on the second clamping rib and is located inside the cavity. The first movable buckle is in the shape of a stepped column. When the soft connecting layer is a shock-absorbing soft rubber pad layer, the shock-absorbing soft rubber pad layer is located below the first clamping rib, and the shock-absorbing soft rubber pad layer wraps the second clamping groove; the electric toothbrush also includes a second movable buckle, which is mounted on the second clamping rib and is located inside the cavity, and one side of the second movable buckle is a square raised surface and the other side is an arc-shaped raised surface.

2. An electric toothbrush according to claim 1, characterized in that: The inner wall of the cavity is provided with a plurality of limiting protrusions at intervals along the circumferential direction, and the limiting protrusions are located below the micro motor. The toothbrush handle is composed of a first handle part and a second handle part which are detachably connected.

3. An electric toothbrush according to claim 1, characterized in that: The bottom of the transmission rod is provided with two first limiting grooves spaced apart along the circumferential direction, and the inner wall of the toothbrush handle is provided with two first limiting blocks along the circumferential direction, and the first limiting blocks correspond to the first limiting grooves.

4. An electric toothbrush according to claim 1, characterized in that: Two second limiting blocks are arranged above the bracket at intervals along the circumferential direction, and two second limiting grooves are arranged on the inner wall of the toothbrush handle along the circumferential direction, and the second limiting blocks correspond to the second limiting grooves.

5. An electric toothbrush according to claim 1, characterized in that: The electric control component includes a circuit board, a battery and a charging base. The charging base is installed at the bottom of the toothbrush handle. The circuit board and the battery are respectively installed on both sides of the bracket, and the circuit board is electrically connected to the battery. The battery is installed on the charging base and is charged by magnetic field induction.

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