WO2023201776A1 - 一种电动牙刷头 - Google Patents

一种电动牙刷头 Download PDF

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Publication number
WO2023201776A1
WO2023201776A1 PCT/CN2022/090262 CN2022090262W WO2023201776A1 WO 2023201776 A1 WO2023201776 A1 WO 2023201776A1 CN 2022090262 W CN2022090262 W CN 2022090262W WO 2023201776 A1 WO2023201776 A1 WO 2023201776A1
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WO
WIPO (PCT)
Prior art keywords
rod
brush
hole
electric toothbrush
limiting
Prior art date
Application number
PCT/CN2022/090262
Other languages
English (en)
French (fr)
Inventor
周阳
Original Assignee
广州嘻嘻三斤设计有限公司
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Filing date
Publication date
Application filed by 广州嘻嘻三斤设计有限公司 filed Critical 广州嘻嘻三斤设计有限公司
Publication of WO2023201776A1 publication Critical patent/WO2023201776A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/221—Control arrangements therefor

Definitions

  • the present invention relates to the technical field of electric toothbrush manufacturing, in particular to an electric toothbrush head.
  • Electric toothbrushes use the rapid rotation or vibration of the electric movement to cause the brush head to rotate or vibrate at high frequencies, which instantly breaks down the toothpaste into fine foam and cleans deeply between the teeth.
  • the vibration of the bristles can promote blood circulation in the mouth, which is good for It has a massaging effect on the gum tissue. Therefore, electric toothbrushes began to be gradually accepted and used by the public.
  • the existing electric toothbrush usually consists of an electric toothbrush driving body and an electric toothbrush head.
  • the electric toothbrush head is assembled on the electric toothbrush driving body. When the bristles of the electric toothbrush head are worn, the electric toothbrush head needs to be replaced.
  • Figure 1 shows an existing electric toothbrush driving body.
  • the driving shaft 10 rotates back and forth in the circumferential direction.
  • the driving force for the driving shaft 10 to rotate back and forth in the circumferential direction can be achieved by arranging a swing motor or other structures on the electric toothbrush driving body 100.
  • the driving shaft 10 can also be provided with a snap-in groove 101 to facilitate connection with the electric toothbrush head.
  • the brush plate A metal positioning pin is installed on the installation end of the top of the brush rod and allows the brush plate to swing within a swing angle of 20-35 degrees;
  • the brush rod is provided with a transmission component, and the transmission component includes a mounting bracket made of plastic material Rod, a transmission shaft is provided in the installation rod, and a spring is installed on the transmission shaft and then installed in the installation hole of the installation rod.
  • the top of the transmission shaft is provided with a swing pin that can swing the brush plate left and right.
  • the installation rod There is also a fixed pin at the top. After the fixed pin is installed in the brush rod, the installation rod can rotate left and right along the fixed pin as the axis.
  • the tail of the installation rod is provided with a mounting hole for installing the driving component.
  • the transmission component drives the brush plate to swing left and right.
  • the transmission components of this kind of electric toothbrush head include a mounting rod, a transmission shaft, a spring, a swing pin and a fixed pin.
  • the structure is relatively complex and assembly is difficult, and the transmission reliability also needs to be improved.
  • the technical problem to be solved by the present invention is to provide an electric toothbrush head with a simple transmission component structure, easy assembly, and high transmission reliability.
  • an electric toothbrush head which includes a brush rod and a brush plate.
  • a cavity is provided in the middle of the brush rod, and bristles are installed on the brush plate.
  • the brush plate is connected to the upper end of the brush rod and can be relative to the brush rod.
  • the brush rod rotates, and a transmission rod is installed in the cavity of the brush rod.
  • One end of an L-shaped linkage rod is connected to the brush plate, the other end of the L-shaped linkage rod is connected to the upper part of the transmission rod, and the other end of the L-shaped linkage rod is connected to the transmission rod.
  • the central axes of rotation do not coincide; when the electric toothbrush head is installed on the electric toothbrush drive body, the lower part of the transmission rod is connected to the drive shaft of the electric toothbrush drive body.
  • the transmission rod is driven by the drive shaft to rotate back and forth in the circumferential direction, and the transmission rod passes through the L-shaped linkage rod. Drive the brush plate to rotate back and forth.
  • the upper part of the transmission rod is provided with a first connection hole.
  • the central axis of the first connection hole is parallel to but not coincident with the rotation center axis of the transmission rod.
  • the brush plate is provided with a second connection hole.
  • the central axis of the second connection hole is in line with the brush.
  • the central axes of disk rotation are parallel but not coincident; one end of the L-shaped linkage rod is plugged into the second connection hole, and the other end is plugged into the first connection hole. This makes installation easier.
  • the brush rod includes a head, a middle support part and a snap-joint part.
  • the lower end of the head is sleeved with the upper end of the middle support part, and the snap-joint part is snap-joined with the middle support part; the transmission rod is pivoted in the middle support part, and the transmission rod is pivoted in the middle support part.
  • the axial direction of the rod is jointly limited by the middle support part and the snap-in part. Easy to make and install the brush bar.
  • the head is provided with a plurality of elastic snap-in protrusions, the free ends of the snap-in protrusions are provided with hooks, the inner surfaces of the plurality of snap-in protrusions are on the same cylindrical surface, and the brush A pivot shaft extends outward from the side of the disc away from the bristles.
  • An annular positioning groove is provided in the middle of the pivot shaft. The outer circumferential surface of the pivot shaft matches the inner surfaces of multiple snap-in protrusions. Each snap-in protrusion has a The hook is matched with the annular positioning groove.
  • the lower end of the transmission rod is provided with a connecting recessed hole
  • the inner surface of the connecting recessed hole is provided with a snap-in protrusion
  • the snap-in portion is provided with a convex portion that is socketed with the connection recessed hole.
  • the connecting portion is also provided with a through hole corresponding to the connection recessed hole, and the outer peripheral surface of the driving shaft is provided with a snap-in groove.
  • a limiting shoulder is provided on the outer peripheral surface of the middle part of the transmission rod, and a limiting part is provided inside the middle support part, and the limiting part cooperates with the limiting shoulder. This structure facilitates the assembly and axial positioning of the transmission rod.
  • the upper part of the brush rod is pivotally connected to a rotating base, and a connecting shaft extends outward from the back of the brush plate.
  • the connecting shaft is connected to the rotating base in an axially displaceable and circumferential fixed manner, and one end of the L-shaped linkage rod
  • the rotating seat is connected to the brush plate.
  • the rotating seat has an outer cylindrical surface and matching holes distributed axially along the outer cylindrical surface.
  • the connecting shaft on the brush plate is inserted into the matching hole.
  • the upper part of the brush rod is provided with an inner cylindrical surface, and the inner cylindrical surface is connected with the The outer cylindrical surface matches;
  • the middle part of the connecting shaft is provided with a radially distributed limit groove, and the upper part of the brush rod is also pivotally connected with a first limit pin that is axially parallel to the outer cylindrical surface.
  • the pin is provided with a radial limiting convex portion, and the first limiting pin is rotated to make the radial limiting convex portion fit into the limiting groove or disengage from the limiting groove; the rotating base is provided with a connecting hole, One end of the L-shaped linkage rod is plugged into the connecting hole.
  • the upper part of the brush rod is also equipped with a second limiting pin perpendicular to the axial direction of the outer cylindrical surface.
  • the second limiting pin blocks the rotating seat so that the rotating seat cannot separate from the brush rod.
  • a tension spring is installed between the first limit pin and the brush rod.
  • One end of the tension spring is connected to the first limit pin and the other end is connected to the brush rod.
  • the tension spring makes the radial direction
  • the limiting convex part can stably fit on the limiting groove; the rear end of the first limiting pin is provided with a bayonet, and the rear end of the upper part of the brush rod is provided with a through hole corresponding to the bayonet, and the key passes through the through hole
  • the first limiting pin can be rotated by inserting into the bayonet. This allows faster replacement of brush discs and bristles.
  • the brush rod includes a head, a middle support part and a snap-joint part, the lower end of the head is connected to the upper end of the middle support part, the snap-joint part is snap-joined with the middle support part;
  • the transmission rod is pivoted in the middle support part, The axial direction of the transmission rod is jointly limited by the intermediate support part and the snap-in part;
  • the rotating seat is installed on the head, and the through hole corresponding to the bayonet is provided on the head;
  • a hinge seat is provided in the head , the middle part of the first limiting pin is pivotally connected to the hinge seat, and the rear end of the first limiting pin is matched with the through hole corresponding to the bayonet.
  • the rotating seat has an outer cylindrical surface and matching holes distributed axially along the outer cylindrical surface.
  • the connecting shaft on the brush plate is inserted into the matching hole.
  • the upper part of the brush rod is provided with an inner cylindrical surface, and the inner cylindrical surface is connected with the The outer cylindrical surface matches; the rear end of an elastic part is connected to the rear part of the connecting shaft, the front end of the elastic part is provided with a limiting convex part, the upper part of the brush rod is provided with a limiting through hole, and the limiting convex part is matched with the limiting convex part.
  • the outer surface of the rotating seat is also provided with a relief through hole that communicates with the fitting hole, and the limiting convex portion can extend from the relief through hole or be pressed into the fitting hole;
  • the upper part of the brush rod is also equipped with a limit pin perpendicular to the axial direction of the connecting shaft. The limit pin is inserted into the displacement through hole and blocks the rotating seat so that the rotating seat cannot be separated from the brush rod. This can not only prevent the rotating seat from being separated from the brush rod, but also allow the elastic part to move freely.
  • one end of an L-shaped linkage rod is connected to the brush plate, and the other end of the L-shaped linkage rod is connected to the upper part of the transmission rod.
  • the other end of the L-shaped linkage rod does not coincide with the rotation center axis of the transmission rod. In this way, the L-shaped linkage rod and the transmission rod can drive the brush plate to rotate back and forth by linking each other.
  • the transmission components have a simple structure, are easy to assemble, and have high transmission reliability.
  • Figure 1 is a perspective view of a conventional electric toothbrush driving body according to the present invention.
  • Figure 2 is a perspective view of the first embodiment of the present invention
  • Figure 3 is a perspective view of the hidden part of the brush rod in Figure 2;
  • Figure 4 is a top view of the first embodiment of the present invention.
  • Figure 5 is a cross-sectional view along line A-A of Figure 4.
  • Figure 6 is a B-B cross-sectional view of Figure 4.
  • Figure 7 is a perspective view of the brush rod according to the first embodiment of the present invention.
  • Figure 8 is an exploded three-dimensional view of the brush rod of Figure 7;
  • Figure 9 is a partial cross-sectional structural view of the first embodiment of the present invention matched with the electric toothbrush driving body of Figure 1;
  • Figure 10 is a perspective view of the second embodiment of the present invention.
  • Figure 11 is a perspective view of the hidden part of the brush rod in Figure 10;
  • Figure 12 is a top view of the second embodiment of the present invention.
  • Figure 13 is a C-C cross-sectional view of Figure 12;
  • Figure 14 is a D-D cross-sectional view of Figure 12;
  • Figure 15 is a perspective view of the brush rod according to the second embodiment of the present invention.
  • Figure 16 is a perspective view of the rotating base according to the second embodiment of the present invention.
  • Figure 17 is a perspective view of the brush disk according to the second embodiment of the present invention.
  • Figure 18 is a partial cross-sectional structural view of the second embodiment of the present invention matched with the electric toothbrush driving body of Figure 1;
  • Figure 19 is a perspective view of the third embodiment of the present invention.
  • Figure 20 is a perspective view of the hidden part of the brush rod in Figure 19;
  • Figure 21 is a top view of the third embodiment of the present invention.
  • Figure 22 is a cross-sectional view along line E-E of Figure 21;
  • Figure 23 is a perspective view of the brush rod according to the third embodiment of the present invention.
  • Figure 24 is a perspective view of the rotating base according to the third embodiment of the present invention.
  • Figure 25 is a perspective view of the brush disk according to the third embodiment of the present invention.
  • an electric toothbrush head includes a brush rod 1 and a brush disc 2.
  • a cavity 1a is provided in the middle of the brush rod 1.
  • the cavity 1a communicates with the upper end side of the brush rod 1 and the brush rod. 1 lower end surface, the brush plate 2 is fixedly connected with bristles 2a.
  • the brush plate 2 is connected to the upper end of the brush rod 1 and can rotate relative to the brush rod 1.
  • the cavity 1a of the brush rod 1 is equipped with a transmission rod 3 and an L-shaped One end of the linkage rod 4 is connected to the brush plate 2, and the other end of the L-shaped linkage rod 4 is connected to the upper part of the transmission rod 3.
  • the other end of the L-shaped linkage rod 4 does not coincide with the rotation center axis of the transmission rod 3; the electric toothbrush head is installed on the electric toothbrush
  • the lower part of the transmission rod 3 is connected to the drive shaft 10 of the electric toothbrush drive body 100.
  • the transmission rod 3 is driven by the drive shaft 10 to rotate back and forth in the circumferential direction.
  • the transmission rod 3 then drives the brush plate 2 back and forth through the L-shaped linkage rod 4. Turn.
  • a more specific structure is that the upper part of the transmission rod 3 is provided with a first connection hole 31.
  • the central axis of the first connection hole 31 is parallel to but not coincident with the rotation center axis of the transmission rod 3.
  • the first connection hole 31 is a through hole;
  • the brush plate 2 is provided with a second connection hole 21.
  • the central axis of the second connection hole 21 is parallel to but not coincident with the rotation center axis of the brush plate 2.
  • the second connection hole 21 is a blind hole; one end of the L-shaped linkage rod 4 is plugged in The other end is plugged into the second connection hole 21 and the first connection hole 31 .
  • the brush rod 1 includes a head 11, a middle support part 12 and a snap-joint part 13.
  • the lower end of the head 11 is socketed with the upper end of the middle support part 12, and the snap-joint part 13 is snap-joined with the middle support part 12.
  • the middle support part 12 is provided with a through groove 12a in the middle and lower part, and the two inner sides of the through groove 12a are provided with engaging recesses 12b.
  • the engaging portion 13 is provided with engaging hooks 13a on both sides, and the engaging portion 13 is partially embedded in the through groove 12a.
  • a snap hook 13a matches a snap recess 12b; the transmission rod 3 is pivoted in the middle support part 12, and the axial direction of the transmission rod 3 is jointly limited by the middle support part 12 and the snap part 13.
  • the head 11 is provided with a plurality of elastic engaging protrusions 111.
  • the free ends of the engaging protrusions 111 are provided with hooks 112.
  • the inner surfaces of the plurality of engaging protrusions 111 are on the same cylindrical surface.
  • a pivot shaft 2b extends outward from the side of the brush plate 2 away from the bristles 2a.
  • An annular positioning groove 21b is provided in the middle of the pivot shaft 2b.
  • the outer circumferential surface of the pivot shaft 2b matches the inner surfaces of the plurality of engaging protrusions 111. , the hook 112 on each engaging protrusion 111 is engaged with the annular positioning groove 21b.
  • the lower end of the transmission rod 3 is provided with a connecting recessed hole 32, the inner side of the connecting recessed hole 32 is provided with a snap-in protrusion 33, and the snap-in portion 13 is provided with a protrusion that is sleeved with the connection recessed hole 32. 131.
  • the convex portion 131 extends upward from an end surface 132 of the snap-in portion 13.
  • the connecting recessed hole 32 on the transmission rod 3 is sleeved on the convex portion 131.
  • the lower end of the transmission rod 3 abuts against the end surface 132.
  • the clip connection The portion 13 is also provided with a through hole 133 corresponding to the connecting recessed hole 32.
  • the outer circumferential surface of the driving shaft 10 is provided with a engaging groove 101. The driving shaft 10 is inserted into the through hole 133 through the through hole 133.
  • a limiting shoulder 34 is provided on the outer peripheral surface of the middle part of the transmission rod 3 , and a limiting portion 121 is provided inside the middle support portion 12 .
  • the limiting portion 121 cooperates with the limiting shoulder 34 .
  • the axial direction of the transmission rod 3 is limited by the limiting portion 121 of the intermediate support portion 12 and the end surface 132 of the clamping portion 13 .
  • the brush rod 1 and brush disc 2 can be formed by injection molding.
  • the driving shaft 10 of the electric toothbrush driving body 100 is inserted into the connecting recess 32 at the lower end of the transmission rod 3 , and the engaging groove 101 on the outer peripheral surface of the driving shaft 10 is connected to
  • the snap-on protrusion 33 on the transmission rod 3 matches; the lower part of the brush rod 1 matches and is relatively fixed with the shell of the electric toothbrush driving body 100.
  • the driving shaft 10 moves along the Rotating back and forth in the circumferential direction
  • the transmission rod 3 is driven by the driving shaft 10 to rotate back and forth in the circumferential direction
  • the transmission rod 3 drives the brush disk 2 to rotate back and forth through the L-shaped linkage rod 4, so that the brush disk 2 can drive the bristles 2a to rotate back and forth for electric brushing.
  • Embodiment 2 As shown in Figures 10 to 18, an electric toothbrush head is different from Embodiment 1 in that the upper part of the brush rod 1 is pivotally connected to a rotating seat 5, and a connecting shaft extends outward from the back of the brush plate 2. 21.
  • the connecting shaft 21 is connected to the rotating base 5 in an axially displaceable and circumferentially fixed manner.
  • One end of the L-shaped linkage rod 4 is first connected to the brush plate 2 by connecting the rotating base 5.
  • the transmission rod 3 passes through the driving shaft 10. When driven to rotate back and forth in the circumferential direction, the transmission rod 3 drives the brush plate 2 to rotate back and forth through the L-shaped linkage rod 4 and the rotating seat 5.
  • the rotating seat 5 has an outer cylindrical surface 51 and matching holes 52 distributed axially along the outer cylindrical surface 51.
  • the connecting shaft 21 on the brush plate 2 is inserted into the matching hole 52, and the upper part of the brush rod 1 That is, the upper head 11 of the brush rod 1 is provided with an inner cylindrical surface 111, and the inner cylindrical surface 111 matches the outer cylindrical surface 51.
  • the rotating seat 5 can be molded by injection molding; the middle part of the connecting shaft 21 is provided with a radial
  • the limit grooves 211 are distributed, and the upper part of the brush rod 1 is also pivotally connected with a first limit pin 6 that is axially parallel to the outer cylindrical surface 51.
  • the head of the brush rod 1 is provided with a hinge seat 112, and the first limit pin 6
  • the middle part of 6 is pivotally connected to the hinge seat 112.
  • the first limiting pin 6 is provided with a radial limiting convex portion 61. Rotate the first limiting pin 6 so that the radial limiting convex portion 61 fits in the limiting groove. 211 on or out of the limiting groove 211.
  • the upper part of the brush rod 1, that is, the upper head 11 of the brush rod 1, is also equipped with a second limit pin 7 that is perpendicular to the axial direction of the outer cylindrical surface 51.
  • the second limit pin 7 blocks one end of the rotating seat 5. The rotating base 5 cannot be separated from the brush rod 1 .
  • a tension spring 8 is installed between the first limit pin 6 and the brush rod 1.
  • One end of the tension spring 8 is connected to the first limit pin 6 and the other end is connected to the brush rod 1, specifically the brush rod 1.
  • the head 11 is provided with a connecting post 113, and the other end of the tension spring 8 is connected to the connecting post 113. The pulling force of the tension spring 8 enables the radial limiting protrusion 61 to stably fit into the limiting groove 211.
  • the rear end of the first limit pin 6 is provided with a bayonet 62.
  • the upper part of the brush rod 1, that is, the rear end of the head 11, is provided with a through hole 114 corresponding to the bayonet 62.
  • a key is inserted into the brush through the through hole 114.
  • the bayonet 62 can rotate the first limiting pin 6 .
  • the rear end of the first limiting pin 6 is engaged with the through hole 114 corresponding to the bayonet 62 .
  • the rotating base 5 is also provided with a connecting hole 53.
  • the connecting hole 53 is a through hole, and one end of the L-shaped linkage rod 4 is inserted into the connecting hole 53.
  • the structure of the head 11 of the brush rod 1 of this embodiment is different from that of the embodiment, the structure of the middle support part 12 and the snap-joint part 13 and the connection method of the three parts are the same as those of the first embodiment.
  • the driving shaft 10 of the electric toothbrush driving body 100 is inserted into the connecting recess 32 at the lower end of the transmission rod 3, and the engaging groove 101 on the outer peripheral surface of the driving shaft 10 is in contact with the transmission rod.
  • the lower part of the brush rod 1 matches and is relatively fixed with the shell of the electric toothbrush driving body 100. In this way, when the switch 100a of the electric toothbrush driving body 100 is pressed, the driving shaft 10 moves in the circumferential direction.
  • the transmission rod 3 drives the drive shaft 10 to rotate back and forth in the circumferential direction, and the transmission rod 3 drives the brush disk 2 to rotate back and forth through the L-shaped linkage rod 4 and the rotating seat 5, so that the brush disk 2 can drive the bristles 2a to rotate back and forth. Electric brushing.
  • the brush disc 2 with the bristles 2a can be replaced separately.
  • a key is inserted into the bayonet 62 through the through hole 114 to rotate the first limiting pin 6, so that the radial limiting protrusion
  • the part 61 is disengaged from the limiting groove 211, the restriction on the axial displacement of the connecting shaft 21 is released.
  • the brush plate 2 can be removed, replaced with a new brush plate 2 with bristles 2a, and then the key is pulled out.
  • the limiting protrusion 61 is matched with the limiting groove 211 to limit the axial displacement of the connecting shaft 21, so that the toothbrush can be put back into use, effectively reducing the cost of using the electric toothbrush.
  • Embodiment 3 As shown in Figures 19 to 25, an electric toothbrush head is different from Embodiment 2 in that the rear end of an elastic part 22a is connected to the rear of the connecting shaft 22, and the front end of the elastic part 22a is provided with a limited
  • the upper part of the brush rod 1, that is, the head 11 of the brush rod 1 is provided with a limiting through hole 11a.
  • the limiting convex part 22b fits on the limiting through hole 11a, it limits the axial displacement of the connecting shaft 22. Press down the limiting protrusion 22b, and the limiting protrusion 22b will break away from the limiting through hole 11a to release the axial displacement restriction of the connecting shaft 22.
  • the rotating seat 5 has an outer cylindrical surface 5a and a mating hole 5b distributed axially along the outer cylindrical surface 5a.
  • the connecting shaft 22 on the brush plate 2 is inserted into the mating hole 5b.
  • the upper part of the brush rod 1 is provided with an inner cylinder.
  • the inner cylindrical surface 11b matches the outer cylindrical surface 5a.
  • the outer surface of the rotating base 5 is also provided with a relief through hole 5c that communicates with the fitting hole 5b.
  • the limiting protrusion 22b can extend from the relief through hole 5c or be pressed into the fitting hole 5b.
  • the upper part of the brush rod 1, that is, the head 11 of the brush rod 1 is also equipped with a limit pin 11c that is perpendicular to the axial direction of the connecting shaft 22. The limit pin 11c is inserted into the displacement through hole 5c and stuck.
  • the rotating base 5 prevents the rotating base 5 from being separated from the brush rod 1 .
  • the brush plate 2, the connecting shaft 22, and the elastic part 22a can be integrally molded by injection molding, and the rotating seat 5 can also be molded by injection molding.
  • the rotating base 5 is also provided with a connecting hole 53, and one end of the L-shaped linkage rod 4 is inserted into the connecting hole 53.
  • the cooperation method between this embodiment and the electric toothbrush driving body is the same as that in the second embodiment.
  • the bristles 2a When the bristles 2a are worn, use a tool to press the elastic part 22a through the limiting through hole 11a, and press the elastic part 22a into the matching hole 5b to release the The axial displacement of the connecting shaft 22 is limited.
  • the brush disc 2 with worn bristles 2a can be removed, and then replaced with a new brush disc 2 with bristles 2a.
  • the connecting shaft 22 is inserted into the mating hole 5b and is in place, due to the elastic part 22a function, the limiting convex portion 22b fits on the limiting through hole 11a, limiting the axial displacement of the connecting shaft 22, and can be used normally with the electric toothbrush driving body. To effectively reduce the cost of using electric toothbrushes.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Brushes (AREA)

Abstract

一种电动牙刷头，包括刷杆(1)和刷盘(2)，刷杆(1)中间设有空腔(1a)，刷盘(2)上装有刷毛(2a)，刷盘(2)连接在刷杆(1)上端且可相对于刷杆(1)转动，刷杆(1)的空腔(1a)内装有一根传动杆(3)，一根L形联动杆(4)一端与刷盘(2)形成连接，L形联动杆(4)另一端与传动杆(3)上部相连接，L形联动杆(4)另一端与传动杆(3)转动中心轴线不重合；电动牙刷头安装在电动牙刷驱动本体(100)上时，传动杆(3)下部连接电动牙刷驱动本体(100)的驱动轴(10)，传动杆(3)通过驱动轴(10)带动沿周向来回转动，传动杆(3)再通过L形联动杆(4)带动刷盘(2)来回转动。刷杆(1)包括头部(11)、中间支撑部(12)和卡接部(13)；传动杆(3)枢接在中间支撑部(12)内，传动杆(3)的轴向通过中间支撑部(12)与卡接部(13)共同限位。传动部件结构简单，便于装配、传动可靠性较高。

Description

一种电动牙刷头 技术领域
本发明涉及电动牙刷制造技术领域，尤其是一种电动牙刷头。
背景技术
电动牙刷是通过电动机芯的快速旋转或振动，使刷头产生转动或高频振动，瞬间将牙膏分解成细微泡沫，深入清洁牙缝，与此同时，刷毛的颤动能促进口腔的血液循环，对牙龈组织有按摩效果。因此电动牙刷开始被大众逐步接受和使用。现有的电动牙刷通常由一个电动牙刷驱动本体和电动牙刷头组成，电动牙刷头组装在电动牙刷驱动本体上，当电动牙刷头的刷毛磨损后就需要更换电动牙刷头。附图1是一种现有的电动牙刷驱动本体，其驱动轴10沿周向来回转动，驱动轴10沿周向来回转动动力可以通过在电动牙刷驱动本体100上设置摆动电机等结构来实现。驱动轴10上还可设有卡接凹槽101，便于与电动牙刷头连接。
为使得电动牙刷头能与上述电动牙刷驱动本体配合，使得刷盘能够和刷毛一起来回摆动，人们已经设计了多种电动牙刷头的结构。如2013年02月13日就公开一项专利号为ZL201220407088.5、名称为“电动牙刷头”的中国发明专利，其包括刷杆和安装于刷杆顶端的带有刷毛的刷盘，刷盘由金属定位销安装在刷杆顶端的安装端上并可使刷盘在20-35度的摆角内摆动；所述刷杆内设有传动部件，所述传动部件包括塑料材料制成的安装杆，所述安装杆内设置有传动轴，所述传动轴套装一个弹簧后安装在安装杆的安装孔内，传动轴的顶端设置有可使刷盘左右摆动的摆动销，所述安装杆的顶端还设置有一个固定销，固定销安装在刷杆内后可使安装杆沿固定销为轴心进行左右旋转，所述安装杆的尾部设置有可安装驱动部件的安装孔，在驱动装置的驱动下使传动部件带动刷盘左右摆动。这种电动牙刷头的传动部件要包括安装杆、传动轴、弹簧、摆动销和固定销，结构比较复杂，且装配较为困难，传动可靠性也有待提升。
发明内容
本发明要解决的技术问题是提供一种电动牙刷头，其传动部件结构简单，便于装配、传动可靠性也较高。
为达到上述目的，本发明的技术方案是：一种电动牙刷头，包括刷杆和刷盘，刷杆中间设有空腔，刷盘上装有刷毛，刷盘连接在刷杆上端且可相对于刷杆转动，刷杆的空腔内装有一根传动杆，一根L形联动杆一端与刷盘形成连接，L形联动杆另一端与传动杆上部相连接，L形联动杆另一端与传动杆转动中心轴线不重合；电动牙刷头安装在电动牙刷驱动本体上时，传动杆下部连接电动牙刷驱动本体的驱动轴，传动杆通过驱动轴带动沿周向来回转动，传动杆再通过L形联动杆带动刷盘来回转动。
进一步改进，所述传动杆上部设有第一连接孔，第一连接孔中心轴线与传动杆转动中心轴线相平行但不重合，刷盘设有第二连接孔，第二连接孔中心轴线与刷盘转动中心轴线相平行但不重合；所述L形联动杆一端插接在第二连接孔上、另一端插接在第一连接孔上。这样便于安装。
优选所述刷杆包括头部、中间支撑部和卡接部，头部下端与中间支撑部上端相套接，卡 接部与中间支撑部相卡接；传动杆枢接在中间支撑部内，传动杆的轴向通过中间支撑部与卡接部共同限位。便于刷杆制作和安装。
作为一种改进，所述头部内设有多个有弹性的卡接凸部，卡接凸部的自由端设有卡钩，多个卡接凸部内侧面处于同一圆柱面上，所述刷盘远离刷毛一侧向外延伸一根枢接轴，枢接轴中部设有环形定位槽，所述枢接轴外周面与多个卡接凸部内侧面相配合，每个卡接凸部上的卡钩配合在所述环形定位槽上。
进一步，所述传动杆的下端设有连接凹孔，连接凹孔内侧面设有卡接凸起，所述卡接部上设有与所述连接凹孔相套接的凸部，所述卡接部上还设有对应所述连接凹孔的一个通孔，所述驱动轴外周面上设有卡接凹槽，所述驱动轴穿过所述通孔插入所述连接凹孔时，所述卡接凸起与所述卡接凹槽相配合；
所述传动杆中部外周面设有一限位肩台，中间支撑部内部设有一限位部，限位部与限位肩台相配合。这样结构便于传动杆的装配及轴向定位。
作为另一种改进，所述刷杆上部枢接一转动座，刷盘后面向外延伸一连接轴，连接轴与轴向可移位周向固定方式连接在转动座上，L形联动杆一端通过连接转动座与所述刷盘形成连接，传动杆通过驱动轴带动沿周向来回转动时，传动杆再通过L形联动杆、转动座带动刷盘来回转动。
进一步，所述转动座具有一外圆柱面和沿该外圆柱面轴向分布的配合孔，所述刷盘上的连接轴插入该配合孔，刷杆上部设有一内圆柱面，内圆柱面与所述外圆柱面相配合；所述连接轴中部设有一沿径向分布限位槽，刷杆上部还枢接一根与该外圆柱面轴向相平行的第一限位销，第一限位销上设有一径向限位凸部，转动该第一限位销使得该径向限位凸部配合在该限位槽上或脱离该限位槽；所述转动座上设有一连接孔，L形联动杆一端插接在连接孔上。这样当电动牙刷头上刷毛磨损后仅需更换刷盘和刷毛就可以，不需要更换整个电动牙刷头，可以有效降低电动牙刷的使用成本。
进一步，所述刷杆上部还装有一根与该外圆柱面轴向相垂直的第二限位销，第二限位销卡住所述转动座使得转动座不能脱离所述刷杆。
进一步，所述第一限位销与所述刷杆之间装有一拉簧，拉簧一端连接在第一限位销上、另一端连接在刷杆上，通过拉簧的拉力使得该径向限位凸部能够稳定配合在该限位槽上；所述第一限位销后端设有一卡口，所述刷杆上部后端设有对应所述卡口的通孔，钥匙通过通孔插入所述卡口可转动所述第一限位销。这样就可以更快速更换刷盘和刷毛。
进一步，所述刷杆包括头部、中间支撑部和卡接部，头部下端与中间支撑部上端相套接，卡接部与中间支撑部相卡接；传动杆枢接在中间支撑部内，传动杆的轴向通过中间支撑部与卡接部共同限位；所述转动座安装在头部上，对应所述卡口的通孔设置在头部上；所述头部内设有一铰接座，第一限位销中部枢接在铰接座上，第一限位销后端配合在对应所述卡口的通孔上。
进一步，所述转动座具有一外圆柱面和沿该外圆柱面轴向分布的配合孔，所述刷盘上的连接轴插入该配合孔，刷杆上部设有一内圆柱面，内圆柱面与所述外圆柱面相配合；一个弹 性部的后端连接在所述连接轴后部，弹性部前端设有限位凸部，所述刷杆上部设有一限位通孔，限位凸部配合在限位通孔上时限制连接轴轴向移位，压下限位凸部，限位凸部脱离所述限位通孔解除连接轴轴向移位限制。这种结构也能方便更换刷盘和刷毛，降低电动牙刷的使用成本。
再进一步，所述转动座外表面还设有连通所述配合孔的让位通孔，所述限位凸部可从所述让位通孔伸出或被压入所述配合孔；所述刷杆上部还装有一根与所述连接轴轴向相垂直的限位销，限位销插入所述让位通孔并卡住所述转动座使得转动座不能脱离所述刷杆。这样既能防止转动座脱离刷杆，又能使得所述弹性部活动自如。
本发明通过一根L形联动杆一端与刷盘形成连接，L形联动杆另一端与传动杆上部相连接，L形联动杆另一端与传动杆转动中心轴线不重合。这样L形联动杆和传动杆相互联动就可以带动刷盘来回转动，传动部件结构简单，也便于装配、传动可靠性较高。
附图说明
图1是本发明一种现有电动牙刷驱动本体立体图；
图2是本发明第一种实施例立体图；
图3是图2隐藏部分刷杆立体图；
图4是本发明第一种实施例俯视图；
图5是图4的A-A剖视图；
图6是图4的B-B剖视图；
图7是本发明第一种实施例刷杆立体图；
图8是图7刷杆立体分解图；
图9是本发明第一种实施例与图1电动牙刷驱动本体相配合的局部剖视结构图；
图10本发明第二种实施例立体图；
图11是图10隐藏部分刷杆立体图；
图12是本发明第二种实施例俯视图；
图13是图12的C-C剖视图；
图14是图12的D-D剖视图；
图15是本发明第二种实施例刷杆立体图；
图16是本发明第二种实施例转动座立体图；
图17是本发明第二种实施例刷盘立体图；
图18是本发明第二种实施例与图1电动牙刷驱动本体相配合的局部剖视结构图；
图19是本发明第三种实施例立体图；
图20是图19隐藏部分刷杆立体图；
图21是本发明第三种实施例俯视图；
图22是图21的E-E剖视图；
图23是本发明第三种实施例刷杆立体图；
图24是本发明第三种实施例转动座立体图；
图25是本发明第三种实施例刷盘立体图。
具体实施方式
下面结合附图和具体的实施方式对本发明作进一步详细说明。
实施例一、图1至图9所示，一种电动牙刷头，包括刷杆1和刷盘2，刷杆1中间设有空腔1a，空腔1a连通刷杆1上端一侧和刷杆1下端面，刷盘2上固连有刷毛2a，刷盘2连接在刷杆1上端且可相对于刷杆1转动，刷杆1的空腔1a内装有一根传动杆3，一根L形联动杆4一端与刷盘2形成连接，L形联动杆4另一端与传动杆3上部相连接，L形联动杆4另一端与传动杆3转动中心轴线不重合；电动牙刷头安装在电动牙刷驱动本体100上时，传动杆3下部连接电动牙刷驱动本体100的驱动轴10，传动杆3通过驱动轴10带动沿周向来回转动，传动杆3再通过L形联动杆4带动刷盘2来回转动。
更为具体的结构为，所述传动杆3上部设有第一连接孔31，第一连接孔31中心轴线与传动杆3转动中心轴线相平行但不重合，第一连接孔31为通孔；刷盘2设有第二连接孔21，第二连接孔21中心轴线与刷盘2转动中心轴线相平行但不重合，第二连接孔21为盲孔；所述L形联动杆4一端插接在第二连接孔21上、另一端插接在第一连接孔31上。
所述刷杆1包括头部11、中间支撑部12和卡接部13，头部11下端与中间支撑部12上端相套接，卡接部13与中间支撑部12相卡接，中间支撑部12中下部设有通槽12a，通槽12a的两内侧均设有卡接凹孔12b，卡接部13两侧均设有卡接钩13a，卡接部13部分嵌入该通槽12a，每个卡接钩13a与一个卡接凹孔12b相配合；传动杆3枢接在中间支撑部12内，传动杆3的轴向通过中间支撑部12与卡接部13共同限位。
所述头部11内设有多个有弹性的卡接凸部111，卡接凸部111的自由端设有卡钩112，多个卡接凸部111内侧面处于同一圆柱面上，所述刷盘2远离刷毛2a一侧向外延伸一根枢接轴2b，枢接轴2b中部设有环形定位槽21b，所述枢接轴2b外周面与多个卡接凸部111的内侧面相配合，每个卡接凸部111上的卡钩112配合在所述环形定位槽21b上。
所述传动杆3的下端设有连接凹孔32，连接凹孔32内侧面设有卡接凸起33，所述卡接部13上设有与所述连接凹孔32相套接的凸部131，该凸部131从卡接部13一端面132向上延伸，传动杆3上的连接凹孔32套接在凸部131上，传动杆3的下端抵在该端面132上，所述卡接部13上还设有对应所述连接凹孔32的一个通孔133，所述驱动轴10外周面上设有卡接凹槽101，所述驱动轴10穿过所述通孔133插入所述连接凹孔32时，所述卡接凸起33与所述卡接凹槽101相配合；
所述传动杆3中部外周面设有一限位肩台34，中间支撑部12内部设有一限位部121，限位部121与限位肩台34相配合。传动杆3的轴向就通过中间支撑部12的限位部121与卡接部13的端面132进行限位。
所述刷杆1、刷盘2可通过注塑成型。
本实施例使用时，如图9进一步所示，电动牙刷驱动本体100的驱动轴10插入所述传动杆3下端的连接凹孔32，所述驱动轴10外周面上的卡接凹槽101与传动杆3上的所述卡接凸起33相配合；刷杆1下部与电动牙刷驱动本体100的外壳配合并相对固定，这样按下电动 牙刷驱动本体100的开关100a，所述驱动轴10沿周向来回转动，传动杆3通过驱动轴10带动沿周向来回转动，传动杆3再通过L形联动杆4带动刷盘2来回转动，这样刷盘2就能带动刷毛2a来回转动进行电动刷牙。
实施例二、图10至图18所示，一种电动牙刷头，其与实施例一不同的是：所述刷杆1上部枢接一转动座5，刷盘2后面向外延伸一连接轴21，连接轴21以轴向可移位周向固定方式连接在转动座5上，L形联动杆4一端先通过连接转动座5与所述刷盘2形成连接，传动杆3通过驱动轴10带动沿周向来回转动时，传动杆3再通过L形联动杆4、转动座5带动刷盘2来回转动。
更具体结构为，所述转动座5具有一外圆柱面51和沿该外圆柱面51轴向分布的配合孔52，所述刷盘2上连接轴21插入该配合孔52，刷杆1上部即刷杆1上头部11设有一内圆柱面111，内圆柱面111与所述外圆柱面51相配合，所述转动座5可通过注塑成型；所述连接轴21中部设有一沿径向分布限位槽211，刷杆1上部还枢接一根与该外圆柱面51轴向相平行的第一限位销6，刷杆1的头部设有铰接座112，第一限位销6中部枢接在铰接座112上，第一限位销6上设有一径向限位凸部61，转动该第一限位销6使得该径向限位凸部61配合在该限位槽211上或脱离该限位槽211。
所述刷杆1上部即刷杆1上头部11还装有一根与该外圆柱面51轴向相垂直的第二限位销7，第二限位销7卡住所述转动座5一端使得转动座5不能脱离所述刷杆1。
所述第一限位销6与所述刷杆1之间装有一拉簧8，拉簧8一端连接在第一限位销6上、另一端连接在刷杆1上，具体为刷杆1的头部11内设有一连接柱113，拉簧8的另一端连接在连接柱113上，通过拉簧8的拉力使得该径向限位凸部61能够稳定配合在该限位槽211上。
所述第一限位销6后端设有一卡口62，所述刷杆1上部即头部11后端设有对应所述卡口62的通孔114，钥匙通过该通孔114插入所述卡口62可转动所述第一限位销6。第一限位销6后端配合在对应该所述卡口62的通孔114上。
转动座5上还设有一连接孔53，连接孔53为通孔，L形联动杆4一端插接在连接孔53上。
本实施例的所述刷杆1除了头部11与实施例头部结构不同外，中间支撑部12和卡接部13的结构及三者连接方式与实施例一相同。
本实施例使用时，如图18进一步所示，电动牙刷驱动本体100的驱动轴10插入传动杆3下端的连接凹孔32，所述驱动轴10外周面上的卡接凹槽101与传动杆3上的所述卡接凸起33相配合；刷杆1下部与电动牙刷驱动本体100的外壳配合并相对固定，这样按下电动牙刷驱动本体100的开关100a，所述驱动轴10沿周向来回转动，传动杆3通过驱动轴10带动沿周向来回转动，传动杆3再通过L形联动杆4、转动座5带动刷盘2来回转动，这样刷盘2就能带动刷毛2a来回转动进行电动刷牙。
本实施例可以单独更换带有刷毛2a的刷盘2，当刷毛2a磨损后，钥匙通过通孔114插入所述卡口62转动所述第一限位销6，使得所述径向限位凸部61脱离该限位槽211，就解除对连接轴21轴向移位限制，可拆下刷盘2，更换上新的带有刷毛2a的刷盘2，然后拔出钥匙， 所述径向限位凸部61又配合在该限位槽211，限制连接轴21轴向移位，可以重新投入使用，有效降低电动牙刷的使用成本。
实施例三、图19至图25所示，一种电动牙刷头，其与实施例二不同的是：一个弹性部22a的后端连接在所述连接轴22后部，弹性部22a前端设有限位凸部22b，所述刷杆1上部即刷杆1头部11上设有一限位通孔11a，限位凸部22b配合在限位通孔11a上时限制连接轴22轴向移位，压下限位凸部22b，限位凸部22b脱离所述限位通孔11a解除连接轴22轴向移位限制。
所述转动座5具有一外圆柱面5a和沿该外圆柱面5a轴向分布的配合孔5b，所述刷盘2上的连接轴22插入该配合孔5b，刷杆1上部设有一内圆柱面11b，内圆柱面11b与所述外圆柱面5a相配合。
所述转动座5外表面还设有连通所述配合孔5b的让位通孔5c，所述限位凸部22b可从所述让位通孔5c伸出或被压入所述配合孔5b；所述刷杆1上部即刷杆1头部11上还装有一根与所述连接轴22轴向相垂直的限位销11c，限位销11c插入所述让位通孔5c并卡住所述转动座5使得转动座5不能脱离所述刷杆1。
所述刷盘2、连接轴22、弹性部22a可以通过注塑一体成型，所述转动座5也可通过注塑成型。所述转动座5上同样设有连接孔53，L形联动杆4一端插接在连接孔53上。
本实施例与电动牙刷驱动本体配合方式与实施例二相同，当刷毛2a磨损后，通过限位通孔11a用工具压下弹性部22a，把弹性部22a压入所述配合孔5b，就解除连接轴22轴向移位限制，可拆下已磨损刷毛2a的刷盘2，然后更换新的带有刷毛2a的刷盘2，所述连接轴22插入配合孔5b到位后，由于弹性部22a作用，限位凸部22b就配合在限位通孔11a上，限制连接轴22轴向移位，就可正常与电动牙刷驱动本体配合使用。以有效降低电动牙刷的使用成本。
尽管结合优选实施例具体展示和介绍了本发明，但所属领域的技术人员应该明白，在不脱离所附权利要求书所限定的本发明的精神和范围内，在形式上和细节上可以对本发明做出各种变化，均为本发明的保护范围。

Claims (12)

  1. 一种电动牙刷头，包括刷杆和刷盘，刷杆中间设有空腔，刷盘上装有刷毛，刷盘连接在刷杆上端且可相对于刷杆转动，其特征在于：刷杆的空腔内装有一根传动杆，一根L形联动杆一端与刷盘形成连接，L形联动杆另一端与传动杆上部相连接，L形联动杆另一端与传动杆转动中心轴线不重合；电动牙刷头安装在电动牙刷驱动本体上时，传动杆下部连接电动牙刷驱动本体的驱动轴，传动杆通过驱动轴带动沿周向来回转动，传动杆再通过L形联动杆带动刷盘来回转动。
  2. 根据权利要求1所述的一种电动牙刷头，其特征在于：所述传动杆上部设有第一连接孔，第一连接孔中心轴线与传动杆转动中心轴线相平行但不重合，刷盘设有第二连接孔，第二连接孔中心轴线与刷盘转动中心轴线相平行但不重合；所述L形联动杆一端插接在第二连接孔上、另一端插接在第一连接孔上。
  3. 根据权利要求1或2所述的一种电动牙刷头，其特征在于：所述刷杆包括头部、中间支撑部和卡接部，头部下端与中间支撑部上端相套接，卡接部与中间支撑部相卡接；传动杆枢接在中间支撑部内，传动杆的轴向通过中间支撑部与卡接部共同限位。
  4. 根据权利要求3所述的一种电动牙刷头，其特征在于：所述头部内设有多个有弹性的卡接凸部，卡接凸部的自由端设有卡钩，多个卡接凸部内侧面处于同一圆柱面上，所述刷盘远离刷毛一侧向外延伸一根枢接轴，枢接轴中部设有环形定位槽，所述枢接轴外周面与多个卡接凸部内侧面相配合，每个卡接凸部上的卡钩配合在所述环形定位槽上。
  5. 根据权利要求3所述的一种电动牙刷头，其特征在于：所述传动杆的下端设有连接凹孔，连接凹孔内侧面设有卡接凸起，所述卡接部上设有与所述连接凹孔相套接的凸部，所述卡接部上还设有对应所述连接凹孔的一个通孔，所述驱动轴外周面上设有卡接凹槽，所述驱动轴穿过所述通孔插入所述连接凹孔时，所述卡接凸起与所述卡接凹槽相配合；
    所述传动杆中部外周面设有一限位肩台，中间支撑部内部设有一限位部，限位部与限位肩台相配合。
  6. 根据权利要求1所述的一种电动牙刷头，其特征在于：所述刷杆上部枢接一转动座，刷盘后面向外延伸一连接轴，连接轴与轴向可移位周向固定方式连接在转动座上，L形联动杆一端通过连接转动座与所述刷盘形成连接，传动杆通过驱动轴带动沿周向来回转动时，传动杆再通过L形联动杆、转动座带动刷盘来回转动。
  7. 根据权利要求6所述的一种电动牙刷头，其特征在于：所述转动座具有一外圆柱面和沿该外圆柱面轴向分布的配合孔，所述刷盘上的连接轴插入该配合孔，刷杆上部设有一内圆柱面，内圆柱面与所述外圆柱面相配合；
    所述连接轴中部设有一沿径向分布限位槽，刷杆上部还枢接一根与该外圆柱面轴向相平行的第一限位销，第一限位销上设有一径向限位凸部，转动该第一限位销使得该径向限位凸部配合在该限位槽上或脱离该限位槽；
    所述转动座上设有一连接孔，L形联动杆一端插接在连接孔上。
  8. 根据权利要求7所述的一种电动牙刷头，其特征在于：所述刷杆上部还装有一根与该外圆柱面轴向相垂直的第二限位销，第二限位销卡住所述转动座使得转动座不能脱离所述刷 杆。
  9. 根据权利要求7所述的一种电动牙刷头，其特征在于：所述第一限位销与所述刷杆之间装有一拉簧，拉簧一端连接在第一限位销上、另一端连接在刷杆上，通过拉簧的拉力使得该径向限位凸部能够稳定配合在该限位槽上；
    所述第一限位销后端设有一卡口，所述刷杆上部后端设有对应所述卡口的通孔，钥匙通过通孔插入所述卡口可转动所述第一限位销。
  10. 根据权利要求9所述的一种电动牙刷头，其特征在于：所述刷杆包括头部、中间支撑部和卡接部，头部下端与中间支撑部上端相套接，卡接部与中间支撑部相卡接；传动杆枢接在中间支撑部内，传动杆的轴向通过中间支撑部与卡接部共同限位；所述转动座安装在头部上，对应所述卡口的通孔设置在头部上；所述头部内设有一铰接座，第一限位销中部枢接在铰接座上，第一限位销后端配合在对应所述卡口的通孔上。
  11. 根据权利要求6所述的一种电动牙刷头，其特征在于：所述转动座具有一外圆柱面和沿该外圆柱面轴向分布的配合孔，所述刷盘上的连接轴插入该配合孔，刷杆上部设有一内圆柱面，内圆柱面与所述外圆柱面相配合；
    一个弹性部的后端连接在所述连接轴后部，弹性部前端设有限位凸部，所述刷杆上部设有一限位通孔，限位凸部配合在限位通孔上时限制连接轴轴向移位，压下限位凸部，限位凸部脱离所述限位通孔解除连接轴轴向移位限制。
  12. 根据权利要求11所述的一种电动牙刷头，其特征在于：所述转动座外表面还设有连通所述配合孔的让位通孔，所述限位凸部可从所述让位通孔伸出或被压入所述配合孔；
    所述刷杆上部还装有一根与所述连接轴轴向相垂直的限位销，限位销插入所述让位通孔并卡住所述转动座使得转动座不能脱离所述刷杆。
PCT/CN2022/090262 2022-04-19 2022-04-29 一种电动牙刷头 WO2023201776A1 (zh)

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CN206355171U (zh) * 2016-07-30 2017-07-28 东莞英伍电子有限公司 一种电动牙刷头
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CN1317295A (zh) * 2000-04-10 2001-10-17 郭红 电动竖刷式保健牙刷
CN202875521U (zh) * 2012-09-26 2013-04-17 沃辉有限公司 电动牙刷头及电动牙刷
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