CN218792588U - Electric toothbrush's brush holder and electric toothbrush - Google Patents

Abstract

The application discloses a brush handle of an electric toothbrush and the electric toothbrush, wherein the brush handle comprises a shell and a machine core; the inner side wall surface of the shell is in a triangular prism shape and comprises a first side wall surface, a second side wall surface and a third side wall surface which are sequentially connected; the movement is positioned in the accommodating cavity of the shell and is attached to at least one of the first side wall surface, the second side wall surface and the third side wall surface; on the first plane, at least half of the projected inner contour line of the shell is positioned on the inner side of the projected circumcircle of the movement, the first plane is vertical to the length extension direction of the shell, and the projected inner contour line of the shell is the projected contour line of the inner side wall surface of the shell on the first plane. The space that can improve the core accounts for the ratio for the core can make full use of the space in holding chamber, reduces the extravagant volume in holding chamber, thereby guarantees that the core can reduce the circumference size and the volume of shell on the basis of holding chamber, makes the brush holder carry convenience more for the user.

Description

Electric toothbrush's brush holder and electric toothbrush

Technical Field

The application relates to the technical field of oral cavity cleaning, in particular to a brush handle of an electric toothbrush and the electric toothbrush.

Background

In the related art, an electric toothbrush includes a brush handle and a brush head, the brush head is connected to an output shaft of the brush handle, the brush handle generally includes a core and a housing, and the core is disposed in the housing.

However, the housing is usually configured to be cylindrical, and the movement is not cylindrical corresponding to the housing, so that the volume of the movement occupying the inner space of the housing is small, and a part of the space in the housing is wasted, thereby causing the volume of the brush handle to be large.

SUMMERY OF THE UTILITY MODEL

The application provides an electric toothbrush's brush holder and electric toothbrush can reduce the volume of brush holder for the brush holder convenience of customers carries more.

In a first aspect, the present application provides an electric toothbrush comprising: the shell is provided with an accommodating cavity, the inner side wall surface of the shell is in a triangular prism shape, and the inner side wall surface of the shell comprises a first side wall surface, a second side wall surface and a third side wall surface which are sequentially connected; the movement is positioned in the accommodating cavity and is attached to at least one of the first side wall surface, the second side wall surface and the third side wall surface; on a first plane, at least half of the projected inner contour of the shell is positioned on the inner side of a circumscribed circle of the projection of the movement, the first plane is perpendicular to the length extension direction of the shell, and the projected inner contour of the shell is the projected contour of the inner side wall surface of the shell on the first plane.

In some embodiments of the present application, a portion of the first plane where the projected inner contour of the housing coincides with the projection of the movement occupies at least half of the projected inner contour of the housing. The movement can be in contact with the inner side wall surface of the shell more fully, so that the space occupied by the gap between the movement and the inner side wall surface of the shell can be further reduced, the space of the accommodating cavity can be more fully utilized by the movement, and the circumferential size and the volume of the shell can be further reduced; in addition, the larger the contact area between the inner side wall surface of the machine core and the inner side wall surface of the shell is, the stronger the shell supports and limits the machine core, so that the installation stability of the machine core in the accommodating cavity can be further improved, and the machine core is prevented from rotating in the use process.

In some embodiments of the present application, the cartridge includes: the first binding surface faces the first side wall surface and is bound with the first side wall surface; the second attaching surface is arranged opposite to the first attaching surface, the joint of the second side wall surface and the third side wall surface is a transition surface, the second side wall surface and the third side wall surface are connected and transited through the transition surface, and the second attaching surface is attached to the transition surface. The shape of the outer contour of the movement is at least partially adapted to the shape of the inner side wall surface of the shell, so that the movement can be in more contact with the outer side wall surface, and the space occupation ratio and the installation stability of the movement can be improved.

In some embodiments of the present application, the transition surface is an arc transition surface, the second sidewall surface and the third sidewall surface are in arc transition connection through the transition surface, and the shape of the second attachment surface is matched with the transition surface. The cambered surface transition surface can enable the connection transition of the second side wall surface and the third side wall to be smoother.

In some embodiments of the present application, the cartridge includes: a frame body; the circuit board is arranged on one side, facing the first side wall surface, of the frame body; the motor is arranged on the frame body, the side surface of the motor facing to the first side wall surface is a mounting plane, and the mounting plane is parallel to the first side wall surface; the shell is provided with a key, and the key and the circuit board are arranged oppositely. The motor can be stably installed and prevented from rotating by designing the mounting plane to be parallel to the first side wall surface; in addition, the keys and the circuit board are arranged oppositely, so that the distance between the keys and the circuit board can be shortened.

In some embodiments of the present application, the cartridge further comprises: the buffer piece is installed on the circuit board and clamped between the circuit board and the first side wall surface. The buffer piece can limit and fix the circuit board, can protect the circuit board and reduce the impact on the circuit board in the vibration process of the electric toothbrush.

In some embodiments of the present application, a junction of the second side wall surface and the third side wall surface is a transition surface, and the movement further includes: the battery is arranged on the frame body, elastic pieces connected with the frame body are arranged at two axial ends of the battery, the elastic pieces protrude to the transition surface along the radial direction of the battery, and the elastic pieces are clamped between the frame body and the shell; the elastic piece is provided with a connecting surface facing the shell, and the connecting surface is matched with the shape of the transition surface and is attached to the transition surface. Utilize the elastic component can promote the joint strength of core and shell to improve the installation stability of core, in addition, the elastic component still has the elastic buffer function, can reduce the vibration of core, reduces the impact force that the core received.

In some embodiments of the present application, the second side wall surface and/or the third side wall surface are provided with a first guide, the movement is provided with a second guide, and the movement is positioned and installed in the accommodating cavity through the matching of the first guide and the second guide. Make the installation of core can be convenient, in addition, first guide can not influence the installation of circuit board.

In some embodiments of the present application, a junction of the first side wall surface and the second side wall surface is spaced apart from the movement, and/or a junction of the first side wall surface and the third side wall surface is spaced apart from the movement. Certain space can be reserved in the accommodating cavity for wiring, or space is provided for the installation of other components.

In some embodiments of the present application, a joint of the first sidewall and the second sidewall is spaced from the movement by a distance greater than 1 mm and less than 4 mm; and/or the distance between the joint of the first side wall surface and the third side wall surface and the movement is more than 1 mm and less than 4 mm. When the spacing distance is too large, the space in the accommodating cavity is wasted, and when the spacing distance is too small, the space is not reserved sufficiently.

In some embodiments of the present application, the outer surface of the housing has a triangular prism shape. Compare in columniform shell, the triangular prism shape's shell more laminates people's phalanx crooked, and adapts to the staff and grips the posture to comfort level when can promote the user and grip.

In some embodiments of the present application, the outer surface of the housing includes a first surface, a second surface and a third surface connected in sequence, the first surface is disposed opposite to the first side wall surface, the second surface is disposed opposite to the second side wall surface, and the third surface is disposed opposite to the third side wall surface; the second surface and the third surface are both arc-shaped surfaces, and on the first plane, the radius of the projection of the second surface and the radius of the projection of the third surface are larger than the radius of a circumscribed circle of the projection of the shell. Make the surface of shell more laminate people's finger bone crooked, and more adapt to people's hand and grip the posture to can promote the user grip the brush holder when with the area of contact of the surface of brush holder, make the user grasp the brush holder more easily, can further promote the comfort level when the user grips simultaneously.

In some embodiments of the present application, a diameter of a circumscribed circle of a projection of the housing on the first plane is less than 30 millimeters. Further improving user comfort.

In a second aspect, the present application provides an electric toothbrush comprising a brush head mounted to the cartridge and a handle as described in any of the above embodiments.

In some embodiments of the present application, the brush head has bristles, and an angle between a length direction of the bristles and a direction perpendicular to the first sidewall surface is 30 to 60 degrees. The button and the brush head can be arranged in a staggered mode, so that when a user uses the electric toothbrush, the thumb of the user is in contact with the button, meanwhile, the bristles naturally form an angle of 30-60 degrees with the teeth of the user, the tooth brushing angle can be close to that of a pasteurization tooth brushing method without the need of deliberately adjusting the tooth brushing angle by the user, and tooth brushing can be more effective.

The beneficial effect of this application does: the movement can be in full contact with the inner side wall surface of the shell, so that the space occupied by the gap between the movement and the inner side wall surface of the shell can be reduced, and the movement can fully utilize the space of the accommodating cavity; in addition, the shell can be used for providing better support and limitation for the movement, so that the installation stability of the movement in the accommodating cavity is improved, and the movement is prevented from rotating in the using process; in addition, through the formation to the shell design for at least half of the interior contour line of the projection of shell is located the inboard of the projected circumscribed circle of core, can improve the space of core and account for, makes the core can make full use of the space in holding chamber, reduces the extravagant volume in holding chamber, thereby guarantees that the core can hold the circumference size and the volume that reduce the shell on the basis in holding chamber, makes the brush holder more convenience of customers carry.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in related arts, the drawings used in the description of the embodiments or related arts will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the structure of a handle according to an embodiment of the present application;

FIG. 2 is a schematic view of a projection of a housing and a cartridge in a first plane according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a movement in an embodiment of the present application at a first viewing angle;

fig. 4 is a schematic structural diagram of a movement in an embodiment of the present application at a second viewing angle;

FIG. 5 is a schematic view of the interior of the housing according to an embodiment of the present application;

FIG. 6 is a schematic view of an electric toothbrush according to an embodiment of the present application.

Reference numerals:

10. a brush handle; 20. a housing; 21. an accommodating cavity; 22. a first sidewall surface; 23. a second sidewall surface; 24. a third sidewall surface; 25. a first surface; 26. a second surface; 27. a third surface; 28. a transition surface; 29. an opening; 30. a movement; 31. a first binding surface; 32. a second bonding surface; 33. a frame body; 34. a circuit board; 35. a motor; 351. arranging a plane; 36. a buffer member; 37. a battery; 38. an elastic member; 381. a connecting surface; 41. a first plane; 50. pressing a key; 61. a first guide member; 62. a second guide member; 70. a brush head; 71. and (3) brush hairs.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The application provides an electric toothbrush's brush holder and electric toothbrush to in solving the correlation technique, the core accounts for the volume of shell inner space less, and partly space in the shell is wasted, thereby causes the great problem of volume of brush holder.

In a first aspect, the present application provides a handle for a power toothbrush, as shown in fig. 1 and 2, handle 10 including a housing 20 and a cartridge 30.

Specifically, the housing 20 has an accommodating cavity 21, an inner side wall of the housing 20 is in a triangular prism shape, and the inner side wall of the housing 20 includes a first side wall 22, a second side wall 23, and a third side wall 24 which are connected in sequence; the housing 20 is used for providing support and protection for the components such as the movement 30, and the material for preparing the housing 20 may be plastic or metal, and the application is not particularly limited; the entirety of the inner side wall surface of the outer casing 20 is substantially in the shape of a triangular prism or the like.

The movement 30 is located in the accommodating cavity 21, and the movement 30 is attached to at least one of the first side wall surface 22, the second side wall surface 23 and the third side wall surface 24; the movement 30 is the main part of the brush handle 10, the movement 30 can be connected with a brush head 70 (as shown in fig. 6) of the electric toothbrush, and drives the brush head 70 to vibrate, so as to clean the oral cavity by using the brush head 70; by attaching the movement 30 to at least one side wall surface of the inner side wall surface of the housing 20, the movement 30 can be in full contact with the inner side wall surface of the housing 20, so that the space occupied by the gap between the movement 30 and the inner side wall surface of the housing 20 can be reduced, and the movement 30 can fully utilize the space of the accommodating cavity 21; in addition, the housing 20 can be utilized to provide better support and restriction for the movement 30, so as to improve the installation stability of the movement 30 in the accommodating cavity 21 and prevent the movement 30 from rotating in the using process.

On the first plane 41, at least half of the projected inner contour of the housing 20 is located inside a circumscribed circle of the projection of the movement 30, the first plane 41 is perpendicular to the longitudinal extension direction of the housing 20, and the projected inner contour of the housing 20 is the projected contour of the inner side wall surface of the housing 20 on the first plane 41.

It can be understood that, the circumscribed circle of the projection of the core 30 refers to a circle intersecting with each vertex on the contour line of the projection of the core 30, the projection of the core 30 is located in the range limited by the circumscribed circle of the projection of the core 30, in the embodiment of the present application, the shape of the housing 20 is designed, so that at least half of the inner contour line of the projection of the housing 20 is located inside the circumscribed circle of the projection of the core 30, the space occupation ratio of the core 30 can be improved, the core 30 can fully utilize the space of the accommodating cavity 21, the waste amount of the accommodating cavity 21 is reduced, thereby the circumferential size and the volume of the housing 20 are reduced on the basis of ensuring that the core 30 can be accommodated in the accommodating cavity 21, and the brush handle 10 is more convenient for the user to carry.

Further, on the first plane 41, the overlapping portion of the projected inner contour of the housing 20 and the projected portion of the movement 30 occupies at least half of the projected inner contour of the housing 20. It can be understood that, the overlapping portion of the inner contour line of the projection of the housing 20 on the first plane 41 and the projection of the movement 30 is the projection of the contact portion of the inner side wall surface of the housing 20 and the movement 30, and through the design of the embodiment, the movement 30 can be more fully contacted with the inner side wall surface of the housing 20, so that the space occupied by the gap between the movement 30 and the inner side wall surface of the housing 20 can be further reduced, the movement 30 can more fully utilize the space of the accommodating cavity 21, and the circumferential size and volume of the housing 20 can be further reduced; in addition, the larger the contact area between the movement 30 and the inner side wall surface of the housing 20 is, the stronger the housing 20 supports and limits the movement 30, so that the installation stability of the movement 30 in the accommodating cavity 21 can be further improved, and the movement 30 is prevented from rotating in the use process.

With continued reference to fig. 1 and 2, in some embodiments of the present application, the outer surface of the outer shell 20 is a triangular prism, that is, the entirety of the outer surface of the outer shell 20 is substantially a triangular prism or a similar triangular prism, and compared to the cylindrical outer shell 20, the triangular prism-shaped outer shell 20 is more suitable for the curvature of the phalanges of a human, and is adapted to the holding posture of a human hand, so as to improve the comfort level of the user in holding.

Further, the outer surface of the housing 20 includes a first surface 25, a second surface 26 and a third surface 27 which are sequentially connected, the first surface 25 is disposed opposite to the first side wall surface 22, the second surface 26 is disposed opposite to the second side wall surface 23, and the third surface 27 is disposed opposite to the third side wall surface 24; wherein, second surface 26 and third surface 27 are the arcwall face, on first plane 41, the radius of the projection of second surface 26 and the radius of the projection of third surface 27 are greater than the radius of the circumscribed circle of the projection of shell 20, make the surface of shell 20 more laminate people's finger bone crooked, and more adapt to people's hand and hold the gesture, thereby can promote the user and hold the area of contact of the surface of brush holder 10 when holding brush holder 10, make the user grasp brush holder 10 more easily, comfort level when can further promote the user and hold simultaneously.

Furthermore, on the first plane 41, the diameter of the circumscribed circle of the projection of the housing 20 is less than 30 mm to further enhance user comfort. On the first plane 41, the diameter of a circumscribed circle of the projection of the housing 20 may be 25 mm, 20 mm, or other values.

In an embodiment of the present application, the inner side wall surface and the outer surface of the outer shell 20 may both be regular triangular prism shapes, that is, the inner side wall surface and the outer surface of the outer shell 20 both are substantially regular triangular prism shapes or similar triangular prism shapes, compared to the outer shell 20, so that the overall shape of the outer shell 20 is more regular, and the comfort level when the user grips can be further improved.

As shown in fig. 2 and 3, in some embodiments of the present application, cartridge 30 includes a first abutting surface 31 and a second abutting surface 32; the first abutting surface 31 faces the first side wall surface 22 and abuts against the first side wall surface 22; the second attaching surface 32 and the first attaching surface 31 are arranged in a back-to-back manner, the junction between the second side wall surface 23 and the third side wall surface 24 is a transition surface 28, the second side wall surface 23 and the third side wall surface 24 are connected and transited through the transition surface 28, and the second attaching surface 32 is attached to the transition surface 28. It can be understood that the first abutting surface 31 and the second abutting surface 32 of the movement 30 abut against the first side wall surface 22 and the transition surface 28 of the housing 20, respectively, so that the contour of the movement 30 at least partially conforms to the shape of the inner side wall surface of the housing 20, thereby allowing the movement 30 to have more contact with the outer side wall surface, and improving the space occupation ratio and the installation stability of the movement 30.

Further, the transition surface 28 is an arc-shaped transition surface 28, the second side wall surface 23 and the third side wall surface 24 are in arc-shaped transition connection through the transition surface 28, and the arc-shaped transition surface 28 can enable the connection transition between the second side wall surface 23 and the third side wall to be smoother; furthermore, the shape of the second abutting surface 32 is adapted to the transition surface 28, so that the second abutting surface 32 can be better abutted to the transition surface 28, and meanwhile, the contact area between the second abutting surface 32 and the transition surface 28 is increased, so that the space occupation ratio and the installation stability of the movement 30 are further improved.

Specifically, the movement 30 includes a frame 33, a circuit board 34, and a motor 35; the circuit board 34 is mounted on the side of the frame 33 facing the first sidewall 22; the motor 35 is mounted on the frame 33, and a side of the motor 35 facing the first sidewall 22 is a mounting plane 351, and the mounting plane 351 is parallel to the first sidewall 22.

It should be noted that the frame 33 is a main supporting structure of the movement 30, the frame 33 may provide support for components such as the circuit board 34 and the motor 35 of the movement 30, and the overall shape of the frame 33 may be a long strip, a block, or other shapes. The circuit board 34 can control the operation of the electronic devices such as the motor 35, and the circuit board 34 can be a single-sided board, a double-sided board or a multi-layered board, and the application does not specifically limit the type, model, size and the like of the circuit board 34. The motor 35 is used to drive the brush head 70 of the electric toothbrush to vibrate, so that oral cleaning can be performed using the brush head 70, and in addition, by designing the seating plane 351 to be parallel to the first sidewall surface 22, the motor 35 can be stably installed, preventing the motor 35 from rotating. Preferably, the bracket is provided with a mounting groove, and the motor 35 is mounted to the mounting groove to reduce the overall volume of the movement 30.

Further, a key 50 (see fig. 1) is disposed on the housing 20, and the key 50 is disposed opposite to the circuit board 34. By pressing the key 50, the functions of on/off, function start, mode adjustment or gear adjustment can be realized, and by arranging the key 50 opposite to the circuit board 34, the distance between the key 50 and the circuit board 34 can be shortened.

With continued reference to fig. 2 and 3, in an embodiment of the present disclosure, the movement 30 further includes a buffer 36, the buffer 36 is mounted on the circuit board 34, and the buffer 36 is interposed between the circuit board 34 and the first sidewall 22. It should be noted that the buffer 36 can limit and fix the circuit board 34, and can provide protection for the circuit board 34, and reduce the impact on the circuit board 34 during the vibration process of the electric toothbrush, in addition, the buffer 36 is a device attached to the first side wall surface 22 in the movement 30, that is, the buffer 36 has the first attachment surface 31, and meanwhile, the buffer 36 can be made of an elastically deformable material, such as rubber, sponge or elastic plastic, so that the buffer 36 can be elastically deformed, and thus, the buffer 36 can be sufficiently attached to the first side wall surface 22, so as to increase the contact area between the buffer 36 and the first side wall surface 22.

As shown in fig. 2 to 4, in an embodiment of the present application, the movement 30 may further include a battery 37, the battery 37 is disposed on the frame 33, two axial ends of the battery 37 are provided with elastic members 38 connected to the frame 33, the elastic members 38 protrude toward the transition surface 28 along a radial direction of the battery 37, and the elastic members 38 are sandwiched between the frame 33 and the housing 20; the elastic element 38 has a connection surface 381 facing the housing 20, and the connection surface 381 is adapted to the shape of the transition surface 28 and is attached to the transition surface 28.

It is understood that the battery 37 is used for supplying power to electronic devices such as the circuit board 34, and the battery 37 may be a dry battery or a storage battery, and the application is not limited to the kind of the battery 37; in this embodiment, the connection surface 381 of the elastic element 38 is the second abutting surface 32 of the movement 30, the connection strength between the movement 30 and the housing 20 can be improved by using the elastic element 38, so as to improve the installation stability of the movement 30, and in addition, the elastic element 38 also has an elastic buffer function, so as to reduce the vibration of the movement 30 and reduce the impact force applied to the movement 30.

In an embodiment of the present application, a junction between the first sidewall 22 and the second sidewall 23 is spaced from the movement 30, and/or a junction between the first sidewall 22 and the third sidewall 24 is spaced from the movement 30; a certain space can be reserved in the accommodating cavity 21 for wiring or providing space for installing other components.

Furthermore, the distance between the joint of the first side wall surface 22 and the second side wall surface 23 and the movement 30 is greater than 1 mm and less than 4 mm; and/or the joint of the first side wall surface 22 and the third side wall surface 24 is spaced from the movement 30 by a distance greater than 1 mm and less than 4 mm. It will be understood that an excessively large spacing results in wasted space within the receiving cavity 21, while an excessively small spacing results in insufficient space being reserved.

The distance between the joint of the first side wall surface 22 and the second side wall surface 23 and the movement 30 may be 1.5 mm, 2 mm, 3 mm, or 3.5 mm; the distance between the junction of the first side wall 22 and the third side wall 24 and the movement 30 may be 1.5 mm, 2 mm, 3 mm, or 3.5 mm.

As shown in fig. 4 and 5, in an embodiment of the present application, the second side wall surface 23 and/or the third side wall surface 24 are provided with a first guide 61, the movement 30 is provided with a second guide 62, the movement 30 is positioned and installed in the accommodating cavity 21 through the cooperation of the first guide 61 and the second guide 62, so that the installation of the movement 30 can be facilitated, and in addition, the first guide 61 is provided on the second side wall surface 23 and/or the third side wall surface 24, and the first guide 61 does not affect the installation of the circuit board 34. It should be further noted that the first guide part 61 may be integrally formed with the housing 20, or the first guide part 61 may be assembled with the housing 20 by welding, gluing, screwing, or clamping after being formed separately; the second guide member 62 may be integrally formed with the frame body 33 of the movement 30, and the second guide member 62 may be assembled with the frame body 33 of the movement 30 by welding, gluing, screwing, or clamping after being formed respectively.

Specifically, one end of the housing 20 is provided with the opening 29 communicated with the accommodating cavity 21, the first guide part 61 can be a chute extending along the length direction of the housing 20, the second guide part 62 can be a slider matched with the chute, the slider can slide along the chute in the chute, when the movement 30 is installed in the accommodating cavity 21 of the housing 20, the position of the movement 30 is adjusted, after the slider corresponds to the chute, the movement 30 is inserted into the accommodating cavity 21 along the length direction of the housing 20 through the opening 29, and then the slider is inserted into the chute and slides along the chute.

Based on the above-mentioned handle 10, the present application also provides an electric toothbrush, as shown in fig. 6, comprising a brush head 70 and a handle 10 as in any of the above-mentioned embodiments, the brush head 70 being mounted to the cartridge 30.

Further, the brush head 70 has bristles 71, and the length direction of the bristles 71 forms an angle α with the direction perpendicular to the first side wall surface 22, where α is 30 to 60 degrees, so that the key 50 and the brush head 70 are arranged in a staggered manner, so that when a user uses the electric toothbrush, the thumb of the user contacts the key 50, and the bristles 71 naturally form an angle of 30 to 60 degrees with the teeth of the user, and the angle of brushing teeth can be close to the angle of the pasteurization method without the user's deliberate adjustment of the angle of brushing teeth, thereby making the brushing teeth more effective. The Pasteur tooth brushing method, also called gingival sulcus cleaning method or horizontal vibration method, is a method recommended by the American dental society for effectively removing bacterial plaque near the gingival margin and in the gingival sulcus, and mainly emphasizes that the tooth brushing method is to lead the length direction of the brush hair 71 and the long axis of the tooth to be in a 45-degree angle towards the apical direction of the tooth (maxilla upwards and mandible downwards) so that a part of the brush hair 71 enters the gingival sulcus to achieve the purpose of cleaning the bacterial plaque in the gingival sulcus, the specific principle of the Pasteur tooth brushing method is disclosed in the related technology for a long time, and the application is not provided with excrescence. Wherein, α may be an angle of 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, or 60 degrees, etc.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims (15)

1. A handle for an electric toothbrush, comprising:

the shell is provided with an accommodating cavity, the inner side wall surface of the shell is in a triangular prism shape, and the inner side wall surface of the shell comprises a first side wall surface, a second side wall surface and a third side wall surface which are sequentially connected; and the number of the first and second groups,

the movement is positioned in the accommodating cavity and is attached to at least one of the first side wall surface, the second side wall surface and the third side wall surface;

on a first plane, at least half of the projected inner contour of the shell is positioned on the inner side of a circumscribed circle of the projection of the movement, the first plane is perpendicular to the length extension direction of the shell, and the projected inner contour of the shell is the projected contour of the inner side wall surface of the shell on the first plane.

2. The handle of claim 1, wherein the projected inner contour of the housing and the projected portion of the cartridge that coincide on the first plane account for at least half of the projected inner contour of the housing.

3. The handle of claim 1, wherein the cartridge comprises:

the first binding surface faces the first side wall surface and is bound with the first side wall surface;

the second attaching surface is arranged opposite to the first attaching surface, the joint of the second side wall surface and the third side wall surface is a transition surface, the second side wall surface and the third side wall surface are connected and transited through the transition surface, and the second attaching surface is attached to the transition surface.

4. The handle according to claim 3, wherein the transition surface is an arc transition surface, the second side wall surface and the third side wall surface are connected in a transition manner through an arc of the transition surface, and the shape of the second abutting surface is matched with the transition surface.

5. The handle of claim 1, wherein the cartridge comprises:

a frame body;

the circuit board is arranged on one side, facing the first side wall surface, of the frame body;

the motor is arranged on the frame body, the side surface of the motor facing to the first side wall surface is a mounting plane, and the mounting plane is parallel to the first side wall surface;

the shell is provided with a key, and the key and the circuit board are arranged oppositely.

6. The handle of claim 5, wherein the cartridge further comprises:

the buffer piece is installed on the circuit board and clamped between the circuit board and the first side wall surface.

7. The handle of claim 5, wherein the junction of the second side wall and the third side wall is a transition surface, the cartridge further comprising:

the battery is arranged on the frame body, elastic pieces connected with the frame body are arranged at two axial ends of the battery, the elastic pieces protrude to the transition surface along the radial direction of the battery, and the elastic pieces are clamped between the frame body and the shell;

the elastic piece is provided with a connecting surface facing the shell, and the connecting surface is matched with the shape of the transition surface and is attached to the transition surface.

8. The brush handle according to claim 1, wherein the second side wall surface and/or the third side wall surface is provided with a first guiding member, the core is provided with a second guiding member, and the core is positioned and installed in the accommodating cavity through the cooperation of the first guiding member and the second guiding member.

9. The handle according to claim 1, wherein the junction of the first side wall and the second side wall is spaced from the cartridge and/or the junction of the first side wall and the third side wall is spaced from the cartridge.

10. The handle according to claim 9, wherein the joint between the first and second side walls is spaced from the core by a distance greater than 1 mm and less than 4 mm; and/or the presence of a gas in the gas,

the distance between the joint of the first side wall surface and the third side wall surface and the movement is more than 1 mm and less than 4 mm.

11. The handle of claim 1, wherein the outer surface of the outer shell is triangular prism shaped.

12. The handle of claim 11, wherein the outer surface of the housing comprises a first surface, a second surface and a third surface connected in series, the first surface being disposed opposite to the first sidewall surface, the second surface being disposed opposite to the second sidewall surface, the third surface being disposed opposite to the third sidewall surface;

the second surface and the third surface are both arc-shaped surfaces, and on the first plane, the radius of the projection of the second surface and the radius of the projection of the third surface are larger than the radius of a circumscribed circle of the projection of the shell.

13. A handle according to claim 12, wherein the projected circumcircle of the housing on the first plane has a diameter of less than 30 mm.

14. An electric toothbrush comprising a brush head and a handle as claimed in any one of claims 1 to 13, the brush head being mounted to the cartridge.

15. The electric toothbrush according to claim 14, wherein the brush head has bristles, and the bristles have a length direction that forms an angle of 30 to 60 degrees with a direction perpendicular to the first side wall surface.

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