Brush handle device and electric toothbrush

Abstract

The utility model provides a brush handle device and an electric toothbrush, comprising: a brush handle housing, one end of which is provided with an extension channel communicated with the inner cavity of the brush handle housing; a movement support; the motor assembly is mounted on the machine core bracket; one end of the output shaft is connected with the motor assembly, and the other end of the output shaft is exposed out of the brush handle shell through the extending channel; the supporting piece is arranged on the output shaft in a sleeving mode, and the supporting piece is provided with a third sleeve; the sealing piece is arranged between the output shaft and the extending channel, the sealing piece is of an integrally-formed structure, the sealing piece is provided with a first sleeve, and the third sleeve abuts against the first sleeve in an interference mode; a first sealing ring and a second sealing ring are arranged on the inner wall face of the first sleeve, the distance between the first sealing ring and the second sealing ring is D1, a third sealing ring and a fourth sealing ring are arranged on the outer wall face of the first sleeve, the distance between the third sealing ring and the fourth sealing ring is D2, and the ratio range of D1 to D2 is 1: 4-3: 4.

Description

TECHNICAL FIELD

[0001] The utility model relates to oral cavity health field especially, and it is a kind of brush handle device and electric toothbrush. BACKGROUND

[0002] In the face of the cleaning needs of the diversification inside oral cavity, electric toothbrush manufacturer is set through servo motor, so that motor shaft drives toothbrush head to rotate clockwise or counterclockwise between 0-360 °, or reciprocating rotation in preset angle interval, to realize vibration toothbrushing, to improve the effect of toothbrushing. However, under this movement mode, sealing sleeve fixed on motor shaft is easy to be twisted or pulled and damaged, seriously affect the sealing effect of electric toothbrush. SUMMARY

[0003] The utility model aims at prior art deficiency, provide a kind of brush handle device and electric toothbrush with more stable sealing effect.

[0004] First, the utility model provides a kind of brush handle device, comprising:

[0005] Brush handle shell, one end of brush handle shell is provided with the extension passage being communicated with its inner cavity;

[0006] Movement core support, movement core support is set in the inner cavity of brush handle shell;

[0007] Motor assembly, motor assembly is installed on movement core support;

[0008] Output shaft, one end of output shaft is connected with motor assembly, and the other end is exposed outside brush handle shell through extension passage;

[0009] Supporting piece, supporting piece is sleeved on output shaft, and supporting piece is provided with third sleeve;

[0010] Sealing element, sealing element is set between output shaft and extension passage, sealing element is one-piece structure, sealing element is provided with first sleeve, third sleeve and first sleeve interference abuts;

[0011] The inner wall surface of first sleeve is provided with first sealing ring and second sealing ring, the distance of first sealing ring and second sealing ring is D1, the outer wall surface of first sleeve is provided with third sealing ring and fourth sealing ring, the distance of third sealing ring and fourth sealing ring is D2, the ratio range of D1 and D2 is 1:4-3:4.

[0012] In one specific embodiment, the first sealing ring and the second sealing ring of the inner wall surface of the first sleeve seal the output shaft, the third sealing ring and the fourth sealing ring of the outer wall surface of the first sleeve seal the support, the distance D1 of the first sealing ring and the second sealing ring is less than the distance D2 of the third sealing ring and the fourth sealing ring, that is, the sealing positions of the inner and outer wall surfaces are different and are formed by sealing rings of different heights, which can reduce the pressure on the contact surface and reduce the wear on the sealing ring, thereby greatly prolonging the service life of the sealing ring. And during the use of the electric toothbrush, even if one of the sealing rings is twisted or worn, it will not affect the sealing effect of the other sealing ring.

[0013] Further, the length of the first sleeve is D3, the ratio of D2 and D3 is 1:5-4:5, the third sealing ring and the fourth sealing ring are arranged on the first sleeve, the third sealing ring and the fourth sealing ring can be arranged at one end of the first sleeve or separately arranged at both ends of the first sleeve, and the arrangement of the two sealing rings can ensure the reliability of the sealing.

[0014] Further, the inner wall surface of the third sleeve is provided with a first step portion, the first step portion cooperates with the fourth sealing ring to limit the elastic deformation of the first sleeve, and the fourth sealing ring and the first step portion sealingly abut, which does not affect the rotation, swing or contraction of the motor shaft, and can keep the position of the first sleeve relatively fixed, and the sealing effect is better.

[0015] Further, the sealing member further comprises a connecting portion and a second sleeve, the first sleeve and the second sleeve are connected through the connecting portion, the sealing member is a one-piece flexible structure, and the arrangement of the second sleeve further improves the sealing effect.

[0016] Further, the second sleeve is provided with a barrel portion and a folded portion, the support is provided with a first mounting portion, the first mounting portion comprises a first protrusion and a first mounting table, the barrel portion and the first protrusion sealingly abut, and the folded portion and the first mounting table sealingly abut, which has the effects that, on the one hand, the axial and radial movement of the barrel portion is limited by the first protrusion, so that the connection between the second sleeve and the support is more stable and reliable; on the other hand, the folded portion and the first mounting table sealingly abut, and can effectively buffer the vibration of the motor assembly, thereby reducing the vibration transmitted from the motor assembly to the brush handle shell.

[0017] Further, the folded portion is provided with a first annular protrusion and a first annular groove, the first annular protrusion is arranged around the first annular groove to form a step surface, and the arrangement of the step surface is beneficial to improving the waterproof effect and facilitating the assembly and fixation with other accessories.

[0018] Further, the inner wall of the brush handle shell is provided with a second annular protrusion, the stepped surface is tightly fixed by the second annular protrusion and the support, and the first annular protrusion limits the second annular protrusion in the stepped surface, so that the position of the folding part is fixed even in high-speed vibration of the movement, and the sealing effect of the sealing element is ensured.

[0019] Further, the inner wall of the brush handle shell is provided with a third annular protrusion, the support is provided with a second mounting portion, the second mounting portion is provided with a second protrusion and a second mounting table, the second protrusion is provided with a shock-absorbing ring, and the second mounting table is tightly fixed by the third annular protrusion and the movement support, so that the position between the support and the brush handle shell is fixed, and the shock-absorbing ring is also beneficial to weakening the vibration touch feeling of the brush handle shell and improving customer experience.

[0020] Further, the support is provided with a base portion, the base portion is provided with a limiting groove, one end of the movement support close to the output shaft is provided with a limiting protrusion, and the limiting groove and the limiting protrusion cooperate to limit the support, so that the production assembly is facilitated, the assembly angle is more accurate, and the position of the support is stable.

[0021] In the second aspect, the utility model also provides an electric toothbrush which comprises the brush handle device.

[0022] The utility model provides a brush handle device and electric toothbrush, the first sealing ring and the second sealing ring of the inner wall surface of first sleeve seal output shaft, the third sealing ring and the fourth sealing ring of the outer wall surface of first sleeve seal support, the distance D1 of first sealing ring and second sealing ring is less than the distance D2 of third sealing ring and fourth sealing ring, namely the sealing position of inner and outer wall surface is different, is constituted by different height sealing ring, such surface can reduce the pressure on contact surface and reduce its wear and tear to sealing ring, can greatly prolong the service life of sealing ring. And in the use process of electric toothbrush, even if one of sealing rings is twisted and broken or worn, the sealing effect of other sealing rings is not affected, so that the brush head has a long service life, and user experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 It is a front view of the electric toothbrush of the utility model embodiment.

[0025] Figure 2It is an explosion schematic view of the brush handle device of the utility model embodiment;

[0026] Figure 3 It is a cross section schematic view of the brush handle device of the utility model embodiment;

[0027] Figure 4 It is Figure 3 It is an enlarged schematic view of A in the middle;

[0028] Figure 5 It is a cross section schematic view of the sealing member of the utility model embodiment;

[0029] Figure 6 It is a cross section schematic view of the supporting member of the utility model embodiment;

[0030] Figure 7 It is an assembly schematic view of the sealing member and the supporting member in the utility model embodiment;

[0031] Figure 8 It is a top view of the sealing member and the supporting member in the utility model embodiment;

[0032] Figure 9 It is an assembly schematic view of the supporting member and the core support in the utility model embodiment.

[0033] Wherein, the reference signs in the drawing: 100 - electric toothbrush; 10 - brush handle device; 11 - brush handle shell; 101 - extension channel; 102 - second annular protrusion; 103 - third annular protrusion; 12 - core support; 121 - limiting protrusion; 13 - motor assembly; 14 - output shaft; 16 - supporting member; 161 - third sleeve; 162 - first step part; 163 - first mounting part; 1631 - first protrusion; 1632 - first mounting table; 164 - second mounting part; 1641 - second protrusion; 1642 - second mounting table; 1643 - shock absorbing ring; 165 - base; 1651 - limiting groove; 166 - avoiding inclined surface; 17 - sealing member; 171 - first sleeve; 181 - inner wall surface; 1811 - first sealing ring; 1812 - second sealing ring; 191 - outer wall surface; 1911 - third sealing ring; 1912 - fourth sealing ring; 172 - connecting part; 173 - second sleeve; 1731 - barrel part; 1732 - folded part; 200 - first annular protrusion; 300 - first annular groove; 400 - step surface. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the utility model more clearly and intelligibly, the utility model is further described in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0035] The components of the application embodiments described and illustrated herein can be arranged and designed in a wide variety of different configurations. Therefore, the following detailed description of the application, read in conjunction with the accompanying drawings, is not intended to limit the scope of the application, but rather is presented as a selected embodiment of the application. As such, the detailed description includes specific details for the purpose of providing a thorough understanding of certain embodiments of the application. It will be apparent to those skilled in the art, however, that the application can be practiced without incorporating all of the specific details described herein. Therefore, the specific details

[0036] Hereinafter, the terms "include", "have", and their conjugates, used in various embodiments of the present application, merely indicate the presence of the features, numbers, steps, operations, elements, components, or combinations thereof, and do not exclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof. In this regard, the terms "first", "second", "third", and the like, are used only to distinguish the description, and should not be understood as designating or implying a relative importance.

[0037] In the present application, unless specifically defined otherwise and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or rotatably connected, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] Some embodiments of toothbrush head and electric toothbrush will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] As Figures 1-2 The utility model discloses an electric toothbrush 100, including brush handle device 10 and brush head (not shown in the drawing), brush handle device 10 includes brush handle casing 11, machine core support 12, motor assembly 13, output shaft 14, support piece 16 and sealing element 17, one end of brush handle casing 11 is provided with the extension passage 101 that communicates with the brush handle inner chamber, and the machine core support 12 is arranged in the inner chamber of brush handle casing 11, and the motor assembly 13 is installed on the machine core support 12, and one end of the output shaft 14 is connected with the motor assembly 13, and the other end is extended outside brush handle casing 11 through the extension passage 101, and the support piece 16 is installed to the output shaft 14, and the sealing element 17 is installed between the output shaft 14 and the extension passage 101, and the sealing element 17 is clamped and fixed between brush handle casing 11 and support piece 16.

[0040] As Figures 3-4As shown, the brush handle shell 11 is provided with a second annular protrusion 102 and a third annular protrusion 103, and the sealing element 17 is arranged between the output shaft 14 and the extension channel 101. The sealing element 17 is of an integrated structure, which can reduce the number of parts required for assembling the electric toothbrush 100, simplify the production process, reduce the installation cost, and reduce the possibility of deviation during assembly. It should be noted that, according to the needs of product design, the sealing element 17 can also be provided as a split structure. The second annular protrusion 102 and the support element 16 are cooperatively assembled to fix the sealing element 17, and the third annular protrusion 103 and the core support 12 are cooperatively assembled to fix the support element 16.

[0041] It should be noted that the brush handle shell 11 is a hard rubber part, and the support element 16 and the sealing element 17 are flexible parts. The hardness of the support element 16 is between that of the brush handle shell 11 and the sealing element 17, i.e., the support element 16 itself has elasticity and can be elastically deformed. The support element 16 can isolate the vibration of the output shaft 14, absorb and reduce the vibration, and achieve the effect of reducing the vibration of the brush handle shell 11 during the operation of the electric toothbrush. In the present embodiment, the material of the hard rubber part includes but is not limited to polypropylene (PP), polyethylene (PP), nylon, polycarbonate (PC), etc., and the material of the flexible part includes but is not limited to thermoplastic elastomer (TPE), silicone, rubber, or nitrile rubber, etc.

[0042] Further in combination Figure 5 and Figure 7 The sealing element 17 is provided with a first sleeve 171, and the inner wall surface 181 of the first sleeve 171 is provided with a first sealing ring 1811 and a second sealing ring 1812. The distance between the two sealing rings is D1. The outer wall surface 191 of the first sleeve 171 is provided with a third sealing ring 1911 and a fourth sealing ring 1912. The distance between the two sealing rings is D2. The ratio of D1 to D2 is in the range of 1:4-3:4, and the ratio can be specifically any one of 1.2:4, 1.5:4, 1.9:4, 2:4, 2.3:4, 2.5:4, 2.8:4, or 3:4. In the present embodiment, the ratio of D1 to D2 is in the range of 1.5:4-2:4. The distance D1 between the first sealing ring 1811 and the second sealing ring 1812 is less than the distance D2 between the third sealing ring 1911 and the fourth sealing ring 1912, i.e., the sealing positions of the inner and outer wall surfaces are different, which are composed of sealing rings of different heights. Such surfaces can reduce the pressure on the contact surface and reduce the wear on the sealing rings, which can greatly prolong the service life of the sealing rings. Moreover, even if one of the sealing rings is twisted or worn during the use of the electric toothbrush 100, it will not affect the sealing effect of the other sealing rings.

[0043] Further, the sealing member 17 further comprises a connecting portion 172 and a second sleeve 173, the first sleeve 171 and the second sleeve 173 are connected through the connecting portion 172, the sealing member 17 is a flexible structure integrally formed, and the sealing effect is further improved by the second sleeve 173. The second sleeve 173 is provided with a barrel portion 1731 and a folded portion 1732, the folded portion 1732 is provided with a first annular protrusion 200 and a first annular groove 300, the first annular protrusion 200 is arranged around the first annular groove 300 to form a stepped surface 400, which is beneficial to improve the waterproof effect, and the stepped surface 400 is tightly fixed by the second annular protrusion 102 and the support member 16, the first annular protrusion 200 limits the second annular protrusion 102 in the stepped surface 400, so that the position of the folded portion 1732 is fixed even in the high-speed vibration of the movement, thereby ensuring the sealing effect of the sealing member.

[0044] In addition, the length of the first sleeve 171 is D3, the ratio of D2 and D3 is 1:5-4:5, the third sealing ring 1911 and the fourth sealing ring 1912 can be arranged at one end of the first sleeve 171, or can be arranged separately at two ends of the first sleeve 171, the arrangement of the two sealing rings can ensure the reliability of the sealing, preferably, in the embodiment, the third sealing ring 1911 and the fourth sealing ring 1912 are arranged separately at two ends of the first sleeve 171, and the first sealing ring 1811 and the second sealing ring 1812 are arranged at the middle of the third sealing ring 1911 and the fourth sealing ring 1912, so as to achieve better waterproof sealing effect and smaller wear and tear.

[0045] As Figure 6 and Figure 8As shown, the support member is provided with a third sleeve 161, and the third sleeve 161 and the first sleeve 171 are in interference abutment when assembled, and the inner wall surface of the third sleeve 161 is provided with a first step portion 162, and the first step portion 162 and the fourth sealing ring 1912 are in abutment when assembled, which does not affect the rotation, swing or contraction of the output shaft 14, and can keep the position of the first sleeve 171 relatively fixed, limit the elastic deformation of the first sleeve 171, and the sealing effect is better. The support member comprises a first mounting portion 163, a second mounting portion 164, a base portion 165 and an avoidance inclined surface 166, the first mounting portion 163 is provided with a first protrusion 1631 and a first mounting table 1632, the cylinder portion 1731 and the first protrusion 1631 are in sealing abutment, and the folded portion 1732 and the first mounting table 1632 are in sealing abutment, which is arranged in this way. On the one hand, the first protrusion 1631 can limit the axial and radial movement of the cylinder portion 1731, so that the connection between the second sleeve 173 and the support member 16 is more stable and reliable; on the other hand, the folded portion 1732 and the first mounting table 1632 are in sealing abutment, and the vibration of the motor assembly 13 can be effectively buffered, thereby reducing the vibration of the motor assembly 13 transmitted to the brush handle shell 11; the second mounting portion 164 is provided with a second protrusion 1641 and a second mounting table 1642, and the second protrusion 1641 is further provided with a damping ring 1643, and the second mounting table 1642 is tightly fixed by the third annular protrusion 103 and the core support 12. The setting of the damping ring 1643 is also conducive to weakening the vibration touch feeling of the brush handle shell, and improving the customer experience.

[0046] As Figure 9 As shown, the base portion 165 is provided with a limiting recess 1651, and the end of the core support 12 close to the output shaft 14 is provided with a limiting protrusion 121, and the limiting recess 1651 and the limiting protrusion 121 are matched and assembled to limit the support member 16. The setting of the avoidance inclined surface 166 is conducive to the assembly of the brush handle shell 11.

[0047] The utility model also proposes a kind of electric toothbrush, the electric toothbrush includes preceding brush handle device 10.The specific structure of the brush handle device 10 refers to the structure described above, since the electric toothbrush of the present application adopts all the technical solutions of the above-described embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-described structure, which will not be repeated here.

[0048] The utility model provides a kind of brush handle device and electric toothbrush, the first sealing ring and second sealing ring of the inner wall surface of first sleeve are sealed to output shaft, the third sealing ring and fourth sealing ring of the outer wall surface of first sleeve are sealed to support piece, the distance D1 of first sealing ring and second sealing ring is less than the distance D2 of third sealing ring and fourth sealing ring, i. e. the sealing position of inner and outer wall surface is different, is constituted by different height sealing ring, such surface can reduce the pressure on contact surface and reduce its wear and tear to sealing ring, can greatly prolong the service life of sealing ring. And in the use process of electric toothbrush, even if one of sealing ring is twisted and broken or worn, the sealing effect of other sealing ring is not influenced, to make brush head have longer service life, improve user experience.

[0049] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A brush handle device, characterized in that, The utility model relates to a brush handle device, comprising: a brush handle shell, one end of the brush handle shell is provided with a protruding channel in communication with the inner cavity thereof; a movement holder arranged in the inner cavity of the brush handle shell; a motor assembly mounted on the movement holder; an output shaft, one end of the output shaft is connected with the motor assembly, and the other end of the output shaft is exposed outside the brush handle shell through the protruding channel; a support member sleeved on the output shaft, the support member is provided with a third sleeve; a sealing member arranged between the output shaft and the protruding channel, the sealing member is an integral structure, the sealing member is provided with a first sleeve, the third sleeve and the first sleeve are in interference abutment; an inner wall surface of the first sleeve is provided with a first sealing ring and a second sealing ring, a distance between the first sealing ring and the second sealing ring is D1, an outer wall surface of the first sleeve is provided with a third sealing ring and a fourth sealing ring, a distance between the third sealing ring and the fourth sealing ring is D2, a ratio of the D1 and the D2 ranges from 1:4 to 3:

4.

2. The brush handle apparatus of claim 1, wherein, a length of the first sleeve is D3, a ratio of the D2 and the D3 ranges from 1:5 to 4:

5.

3. The brush handle apparatus of claim 1, wherein, an inner wall surface of the third sleeve is provided with a first stepped portion, the first stepped portion cooperates with the fourth sealing ring to limit elastic deformation of the first sleeve.

4. The brush handle apparatus of claim 1, wherein the sealing member further comprises a connecting portion and a second sleeve, the first sleeve and the second sleeve are connected through the connecting portion.

5. The brush handle apparatus of claim 4, wherein, the second sleeve is provided with a barrel portion and a folded portion, the support member is provided with a first mounting portion, the first mounting portion comprises a first protrusion and a first mounting platform, the barrel portion and the first protrusion are in sealing abutment, and the folded portion and the first mounting platform are in sealing abutment.

6. The brush handle apparatus of claim 5, wherein, the folded portion is provided with a first annular protrusion and a first annular groove, the first annular protrusion is arranged around the first annular groove to form a stepped surface.

7. The brush handle apparatus of claim 6, wherein, a second annular protrusion is arranged on an inner wall of the brush handle shell, the stepped surface is tightly fixed by the second annular protrusion and the support member, and the first annular protrusion limits the second annular protrusion in the stepped surface.

8. The brush handle apparatus of claim 1, wherein, a third annular protrusion is arranged on the inner wall of the brush handle shell, the support member is provided with a second mounting portion, the second mounting portion is provided with a second protrusion and a second mounting platform, the second protrusion is provided with a shock-absorbing ring, and the second mounting platform is tightly fixed by the third annular protrusion and the movement holder.

9. The brush handle apparatus of claim 1, wherein, the support member is provided with a base portion, the base portion is provided with a limiting groove, one end of the movement holder close to the output shaft is provided with a limiting protrusion, and the limiting groove and the limiting protrusion cooperate to limit the support member.

10. An electric toothbrush characterized by comprising: the utility model relates to a brush handle device, comprising: any one of claims 1-9.

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