CN106901858B - Double-head toothbrush head and electric toothbrush provided with same - Google Patents
Double-head toothbrush head and electric toothbrush provided with same Download PDFInfo
- Publication number
- CN106901858B CN106901858B CN201710312875.9A CN201710312875A CN106901858B CN 106901858 B CN106901858 B CN 106901858B CN 201710312875 A CN201710312875 A CN 201710312875A CN 106901858 B CN106901858 B CN 106901858B
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- brush
- disc
- double
- shaft
- toothbrush head
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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
- A61C17/24—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously
- A61C17/26—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously 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
-
- 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
- A61C17/222—Brush body details, e.g. the shape thereof or connection to handle
Abstract
The invention provides an electric toothbrush provided with a double-acting toothbrush head with a front brush disc and a rear brush disc which move independently. According to the present invention, collision between the front and rear brush disks can be further suppressed, and the stability of movement of the front and rear brush disks can be improved. The double-head toothbrush head of the invention comprises a brush rod (1), a front brush disk (7) and a rear brush disk (6), wherein the front brush disk (7) and the rear brush disk (6) are arranged in front and back and are arranged at the front end part of the brush rod (1), and the double-head toothbrush head also comprises: and a swing lever (18) pivotally supported at a front end portion of the brush lever (1), wherein the front brush disk (7) is driven by a front end of the swing lever (18) to rotate left and right about a rotation center (24) of the front brush disk (7), and the rear brush disk (6) is driven by a rear end of the swing lever (18) to rotate left and right about a rotation center (25) of the rear brush disk (6).
Description
Technical Field
The invention relates to an electric toothbrush, in particular to an electric toothbrush provided with a double-acting toothbrush head with a front brush disc and a rear brush disc which move independently.
Background
At present, with the wide application of electric toothbrushes, double-head toothbrush heads composed of a front brush disk and a rear brush disk are not uncommon on the market. Compared with the prior single-head toothbrush head, the double-head toothbrush head has the advantages of large brush surface and high tooth brushing efficiency.
Disclosure of Invention
Problems to be solved by the invention
However, the double-head toothbrush heads on the market are usually driven by the two brush disks in a linkage manner, and the motion stability of the front brush disk is not fully considered. Therefore, the front and rear brush disks easily collide with each other and rub against each other to generate noise.
Means for solving the problems
In order to solve the above problems, the present invention provides a double-headed toothbrush head including a brush bar, a front brush pan and a rear brush pan, the front brush pan and the rear brush pan being installed in tandem at a front end portion of the brush bar, the double-headed toothbrush head being characterized by further comprising: and a swing lever pivotally supported at a front end portion of the brush lever, the front brush tray being driven by a front end of the swing lever to rotate left and right about a rotation center of the front brush tray, and the rear brush tray being driven by a rear end of the swing lever to rotate left and right about a rotation center of the rear brush tray.
According to the technical scheme, the front brush disc and the rear brush disc are independently driven by utilizing the swinging rod, so that the front brush disc and the rear brush disc move independently, the condition that the double-head toothbrush head is easy to collide due to the mutual linkage motion of the front brush disc and the rear brush disc is avoided, and the noise and the friction generated due to the collision can be further inhibited.
Preferably, the double-ended toothbrush head includes a cover plate mounted to the front end of the brush bar for supporting the rear brush disk. By providing the cover plate, the front brush plate and/or the rear brush plate can be supported by the cover plate, and the front brush plate and/or the rear brush plate can be moved on the upper surface of the cover plate, so that the stability of the front brush plate and/or the rear brush plate in the movement plane can be ensured.
Preferably, the double-headed toothbrush head includes a rotation shaft between front and rear ends of the swing lever, the swing lever being pivotable about an axis of the rotation shaft.
Preferably, the double-headed toothbrush head comprises: a drive shaft which is rotatably driven about a rotational center line of the double-headed toothbrush head, the rotational center line being a central axis of the double-headed toothbrush head in a front-rear direction; and an eccentric shaft provided on a front end side of the transmission shaft so as to be eccentric with respect to the transmission shaft, wherein the swing lever is driven to pivot by the eccentric shaft.
Preferably, the swing lever has a swing hole at a rear end thereof, into which the eccentric shaft is inserted, and the eccentric shaft slides up and down along a hole wall of the swing hole in the swing hole when the eccentric shaft is driven to rotate about the rotation center line.
Preferably, the front end of the swing rod is provided with a swing shaft, the front brush disc is provided with a front disc slot hole at the bottom for the swing shaft to insert, and the swing shaft can slide in the front disc slot hole along the hole wall of the front disc slot hole so as to drive the front brush disc to rotate left and right.
Preferably, the double-head toothbrush head comprises a front disc rotating shaft and a shaft sleeve, wherein the bottom of the front brush disc is provided with a front disc inserting hole, one end of the front disc rotating shaft is fixed on the brush rod, and the other end of the front disc rotating shaft is inserted into the front disc inserting hole through the shaft sleeve. By using a nested rotation mechanism of a shaft and a sleeve, friction force can be suppressed and noise can be reduced.
Preferably, the front disc rotating shaft and the sleeve are made of metal. By using the metal rotation mechanism, the frictional force can be further suppressed and the noise can be reduced.
Preferably, the swing lever is formed with a swing boss above a swing hole at a rear end thereof, the rear brush holder is provided at a bottom thereof with a rear holder groove into which the swing boss is inserted, and the swing boss can slide along a wall of the rear holder groove in the rear holder groove.
Preferably, the double-head toothbrush head further comprises a limiting part, the limiting part is mounted on the brush rod and is provided with an insertion hole for the transmission shaft to penetrate through in a mode of freely rotating around the rotation center line, and the limiting part is arranged on the transmission shaft and close to the eccentric shaft. The limiting part is used for limiting the transmission shaft, so that the deviation of the transmission shaft can be avoided, and the transmission shaft can be ensured to rotate around the rotation center line all the time. Therefore, the stable driving force can be provided through the eccentric axial swinging rod, the stability in the movement of the front brush disc and the rear brush disc is further improved, the friction force can be inhibited, and the noise can be reduced.
Preferably, a cover projection for pressing the stopper is provided on the rear end side of the cover. Utilize the apron to press spacing part, can avoid spacing part to drop to further ensure spacing part to the holding stability of transmission shaft.
Preferably, the double-ended toothbrush head includes a front disc retaining member which limits movement of the front brush disc in a plane. Utilize preceding dish stop component to carry out the spacing of upper and lower direction to preceding brush dish, can improve the stability in the preceding brush dish motion to brush dish collision before can avoiding, reduce frictional force, noise reduction.
Preferably, the front disc stopper member is at least two shaft members, the front brush disc is provided with a front disc column portion extending downward on a lower surface of the disc portion, the front disc column portion is provided with a slide groove, the at least two shaft members are inserted into the slide groove after penetrating through a front end portion of the brush lever in a freely rotatable manner, and the at least two shaft members are in sliding contact with an upper groove wall and a lower groove wall of the slide groove in the movement of the front brush disc.
Preferably, a front disc stopper is disposed above the sliding groove of the front disc column portion, and a lower surface of the front disc stopper and an upper groove wall of the sliding groove are located in the same plane.
Preferably, the cover plate has at least one cover plate protrusion formed on an upper surface thereof. The cover plate is protruded, so that a small interval is formed between the lower surface of the disc part of the rear brush disc and the upper surface of the cover plate, the contact area between the rear brush disc and the upper surface of the cover plate in the movement process can be reduced, the friction force between the rear brush disc and the cover plate in the movement process is reduced, and the noise is reduced.
Preferably, the front end of the cover plate is formed with a cover plate front opening for receiving the front brush plate. The cover plate front opening is formed on the cover plate, so that the front brush disc can be supported in the plane by the cover plate, the front brush disc and the rear brush disc move in the same plane, and the stability of the front brush disc and the rear brush disc in movement is improved.
Preferably, the left and right opening widths of the front opening of the cover plate gradually increase toward the front.
In addition, the invention also provides an electric toothbrush provided with the double-head toothbrush head.
ADVANTAGEOUS EFFECTS OF INVENTION
The invention provides a double-head toothbrush head capable of further inhibiting collision between a front brush disk and a rear brush disk and improving the motion stability of the front brush disk and the rear brush disk, and an electric toothbrush provided with the double-head toothbrush head.
Drawings
Fig. 1 is a perspective view showing a power toothbrush with a double-headed toothbrush head according to the present invention.
Fig. 2 is a partial cross-sectional view of the electric toothbrush according to the present invention, taken along the center in the lateral direction.
Figure 3 is a perspective view showing the double head toothbrush head prior to installation on the brush bar.
Fig. 4 is an exploded perspective view showing a brush holder of the electric toothbrush of the present invention.
Fig. 5 is a perspective view of the swing lever attached to the brush lever as viewed obliquely from the front and upward.
Figure 6 is an exploded perspective view showing the oscillating lever and double-headed toothbrush head.
Fig. 7 is a perspective view showing a state before the rear brush tray and the cover plate are assembled.
Fig. 8 is a perspective view showing the mounting relationship of the swing lever and the front brush tray.
Fig. 9A is a plan view showing a state where the double-headed toothbrush head is in a neutral position.
Fig. 9B is a sectional view taken along line a-a of fig. 9A.
Fig. 10A is a plan view showing a state where the rear brush disk rotates counterclockwise and the front brush disk rotates clockwise.
Fig. 10B is a sectional view taken along line B-B of fig. 10A.
Fig. 11A is a plan view showing a state where the rear brush wheel rotates clockwise and the front brush wheel rotates counterclockwise.
Fig. 11B is a cross-sectional view taken along line C-C of fig. 11A.
Description of the reference numerals
1. A brush bar; 2. a drive shaft; 3. a limiting component; 4. a connecting rod; 5. a cover plate; 5a, a slotted hole; 5b, a cover plate jack; 5c, opening the front of the cover plate; 5d, protruding the cover plate; 5e, cover plate bumps; 6. brushing the disc at the back; 61. a rear disc protrusion; 61a, a protrusion head; 7. a front brush disc; 7a, a front disc jack; 7b, a front disc stop block; 8. a shaft sleeve; 9. a front disc rotating shaft; 10. a pin; 11. a motor 12, a toothbrush body; 13. connecting the rotating shaft; 14. brushing; 15. a front disc slot; 16. a rear disc clamping groove; 17. an eccentric shaft; 18. a swing lever; 18a, a rotating shaft; 19. swinging the boss; 20. a swing shaft; 21. a brush rod boss; 22. a swing hole; 23. a central hole of the brush rod; o, a rotation center line; 24. the rotating center of the front brush disc; 25. center of rotation of rear brush disk
Detailed Description
Hereinafter, for convenience of explanation, the front-back, left-right, and up-down directions of the electric toothbrush are defined. Specifically, fig. 1 is a perspective view showing a power toothbrush with a double-headed toothbrush head according to the present invention. The direction in which the toothbrush main body 12 of the electric toothbrush in fig. 1 extends is referred to as the front-rear direction, the side where the brush holder 1 is provided is referred to as the front side, and the side opposite to the front side in the front-rear direction is referred to as the rear side. In fig. 1, the direction in which the brush 14 extends is the vertical direction, and the side of the vertical direction on which the brush 14 is provided with respect to the front and rear brush boards is the upper side, and the side opposite to the upper side along the vertical direction is the lower side. In addition, a direction orthogonal to both the front-back direction and the up-down direction is referred to as a left-right direction.
The structure of the electric toothbrush of the present invention will be described in detail below.
As shown in fig. 1, the electric toothbrush of the present invention comprises a toothbrush body 12 and a double-ended toothbrush head consisting of a brush bar 1, a rear brush plate 6, a front brush plate 7 and bristles 14. The front and rear brush disks are mounted at the front end of the brush rod 1, and the front and rear brush disks are respectively provided with bristles 14. The brush rod 1, the front and rear brush disks and the bristles 14 constitute the double-head toothbrush head of the invention. Fig. 2 is a partial cross-sectional view of the electric toothbrush according to the present invention, taken along the center in the lateral direction. As shown in fig. 2, a motor 11 is incorporated in the toothbrush main body 12, and the motor 11 drives the double-headed brush head through a transmission mechanism described later. The brush lever 1 includes a hollow cylindrical portion and a front end portion located on the front end side of the brush lever 1 and opened upward. The front brush disk 7 and the rear brush disk 6 are mounted to the front end portion of the brush bar 1 in a front-rear arrangement. In addition, a transmission mechanism consisting of the connecting shaft 13, the connecting rod 4, the transmission shaft 2 with the eccentric shaft 17, and the oscillating lever 18 is accommodated in the brush bar 1. The center axis along the front-rear direction in the attached state of the connecting rod 4 is set as the rotation center line O of the transmission mechanism.
The swing lever 18 is pivotally supported at the front end of the brush lever 1. In fig. 2, a brush holder center hole 23 is provided in the bottom of the front end of the brush holder 1, and the swing lever 18 is provided with a rotating shaft 18 a. The swing lever 18 is rotated about the rotation shaft 18a by inserting the rotation shaft 18a into the brush lever center hole 23 of the brush lever 1. However, the pivot support of the swing lever 18 is not limited to this, and for example, a support shaft may be provided on the brush lever 1, and a boss portion into which the support shaft is inserted may be formed on the swing lever 18. As shown in fig. 4, the rotation shaft 18a of the swing lever 18 is formed with a step so that the diameter decreases toward the upper end side, and the end of the swing shaft 18a on the upper side with respect to the step is inserted into a cover insertion hole 5b of the cover 5 described later. But may not be formed.
The front end of the swing lever 18 drives the front brush disk 7 that is pivotally supported. As shown in fig. 2, a cylindrical hole into which the front disk rotation shaft 9 is inserted is provided in the front end portion of the brush holder 1 at a position forward of the brush holder center hole 23, and the sleeve 8 is fitted and inserted into the front disk rotation shaft 9. The boss 8 is inserted into a front disk insertion hole 7a at a lower portion of the front brush disk 7. The center of the front disk insertion hole 7a coincides with the rotation center 24 of the front brush disk 7. Accordingly, when the front brush disk 7 is attached to the brush rod 1 via the front disk rotating shaft 9 and the boss 8, the concentricity during rotation of the front brush disk 7 can be secured, and friction force can be reduced to suppress wear. Preferably, the sleeve 8 and the front disk rotating shaft 9 are both made of metal, so that the frictional force can be further reduced. In the present embodiment, the front brush disk 7 is pivotally supported by the brush bar 1, but the front brush disk 7 may be pivotally supported by a cover plate 5 described later.
As shown in fig. 2, the stopper member 3 may be attached to the brush lever 1 at a position close to the eccentric shaft 17 and rearward of the eccentric shaft 17. The stopper member 3 is provided with a hole through which the transmission shaft 2 passes so as to be rotatable about the rotation center line O. The limiting part 3 is used for preventing the transmission shaft 2 from deviating from the rotation center line O, and the concentricity of the transmission shaft 2 in the motion process is ensured, so that the friction force can be reduced, and the noise can be reduced. Preferably, the stopper member 3 and the transmission shaft 2 are made of metal to further reduce friction and suppress noise. Fig. 3 shows an example of the stopper member 3, which is plate-shaped and formed in an inverted U-shape. As shown in fig. 2, a brush bar boss 21 is provided at a position of the brush bar 1 which is located in the front-rear direction near the front end portion of the brush bar 1 and rearward of the front end portion, and an unillustrated insertion groove is provided in the brush bar boss 21. The stopper member 3 having an inverted U-shape is inserted into the insertion groove of the brush holder boss 21, and is pressed and fixed by a cover plate 5 for supporting the rear brush 6, which will be described later. However, the stopper member 3 is not limited to the configuration shown in fig. 3, and may be a snap ring formed of a wire, for example. In this case, the brush holder boss 21 need not be provided at the bottom of the brush holder 1, and for example, a claw may be provided as long as the stopper member 3 can be fixed.
The structure of the cover 5 is explained below.
A cover plate 5 is mounted to the brush bar 1 for supporting a rear brush plate 6.
As shown in fig. 3, a clip groove hole 5a, a cover plate insertion hole 5b, and a cover plate front opening 5c are formed in the cover plate 5 in this order from the rear to the front. The clip hole 5a is penetrated so that a portion of the rear brush 6 where a rear disc clip groove 16 described later is provided can move freely in the clip hole 5 a. The cover insertion hole 5b is provided in the cover 5, extends downward from a wall portion rising downward from the lower surface of the cover 5, and receives the upper end portion of the rotating shaft 18a of the swing lever 18. A stepped portion is formed on the inner wall of the cover insertion hole 5 b. As shown in fig. 7, since the cover insertion hole 5b is formed with a stepped portion, the hole diameter on the lower side (upper side of the paper in fig. 7) of the cover insertion hole 5b is larger than the hole diameter on the upper side (lower side of the paper in fig. 7). The stepped portion engages with a projecting head portion 61a of a rear disc projecting portion 61 extending downward at the bottom of the rear brush disc 6. So that the rear brush 6 can rotate about the rear disc protrusion 61 when the rear brush 6 is mounted to the cover plate 5, the rear disc protrusion 61 forming the rotation center 25 of the rear brush 6.
The wall portion of the cover 5 surrounding the cover insertion hole 5b is formed with vertically extending slits on the front end side and the rear end side, respectively, and the width of the slit on the rear end side is smaller than the width of the slit on the front end side. Only one slit may be formed. Since the wall portion of the cover plate 5 is provided with the slit, the rear disk protrusion 61 of the rear brush disk 6 can be easily fitted into the cover plate insertion hole 5b of the cover plate 5 and engaged with the stepped portion in the cover plate insertion hole 5 b.
Further, a front end portion of the cover plate 5 is formed with a cover plate front opening 5c that accommodates the front brush tray 7, and the cover plate front opening 5c communicates with the cover plate insertion hole 5b and is formed in a shape in which a width in the left-right direction gradually increases toward the front. The front end of the cover 5 is thus bifurcated into left and right leg portions. The upper surfaces of the two leg portions of the cover plate 5 are in sliding contact with the lower surface of the disk portion of the front brush disk 7 to support the front brush disk 7, thereby further ensuring the stability of the front brush disk 7 in movement and ensuring that the front and rear brush disks are located at the same height. However, the shape of the cover front opening 5c is not limited to this, and the cover front opening 5c may not be formed, and the cover 5 may be provided as long as the movement of the front brush tray 7 is not hindered. In addition, the front brush plate 7 may be pivotally supported by the cover plate 5.
In addition, as shown in fig. 4, at least one cover protrusion 5d is preferably formed on the upper surface of the cover 5 to reduce the friction of the rear brush tray 6 in rotation.
As shown in fig. 6, a cover projection 5e is preferably provided on the rear end side of the bottom of the cover 5. The cover projection 5e presses the stopper 3 for restricting the movement deviation of the drive shaft 2, so that the lower piece 3 can be prevented from dropping, and the stability of the drive shaft 2 in the movement can be further ensured.
The driving mechanism of the electric toothbrush of the present invention will be described in detail below.
As shown in fig. 2, the rear end of the connecting shaft 13 is connected to the motor 11, and the front end is connected to the propeller shaft 2 via a connecting rod 4 capable of transmitting torque. For example, the rear end of the link 4 is formed in a spider shape and is fitted and connected to the front end of the connecting shaft 13. In fig. 2, an insertion hole is formed at the front end of the connecting rod 4, so that the rear end of the propeller shaft 2 is inserted into the insertion hole of the connecting rod 4 and fixed. However, the tip of the connecting rod 4 connected to the drive shaft 2 is not limited as long as the driving force of the motor 11 can be transmitted to the drive shaft 2. For example, the connecting rod 4 may be formed integrally with the drive shaft 2.
As shown in fig. 2, a flange having the same diameter as the inner diameter of the cylindrical portion of the brush holder 1 is formed at the tip of the connecting rod 4. The front end of the transmission shaft 2 connected with the connecting rod 4 is formed with an eccentric shaft 17. The axis of the eccentric shaft 17 is offset with respect to the axis of the propeller shaft 2. The eccentric shaft 17 is inserted into a swing hole 22 at the rear end of the swing lever 18. The height of the swing hole 22 in the up-down direction is greater than or equal to twice the distance by which the eccentric shaft 17 is eccentric with respect to the propeller shaft 2. When the transmission shaft 2 performs a circumferential rotation motion, the eccentric shaft 17 slides up and down along the hole wall of the swing hole 22 in the swing hole 22 of the swing lever 18, thereby converting the circumferential driving of the motor 11 into a horizontal driving, and driving the front and rear brush disks to perform an in-plane motion via the swing lever 18.
The connection arrangement of the oscillating lever 18 and the front and rear brush plates will be described in detail below.
Figure 6 is an exploded perspective view showing the oscillating lever and double-headed toothbrush head. For the sake of easy observation, fig. 6 shows the swing lever 18 and the front and rear brush plates turned upside down. As shown in fig. 6, a swing shaft 20 is provided at the front end of the swing lever 18, and the swing shaft 20 is inserted into the front disc slot hole 15 at the lower portion of the front brush disc 7 and is slidable along the hole wall in the front disc slot hole 15. A swing boss 19 is provided above a swing hole 22 at the rear end of the swing lever 18, and the swing boss 19 is inserted into the rear disc holder groove 16 of the rear brush disc 6 and is slidable along the groove wall in the rear disc holder groove 16. When the swing lever 18 is pivoted, the front brush disk 7 is rotated about the front disk insertion hole 7a as the rotation center 24 by the swing shaft 20 of the swing lever 18, and the rear brush disk 6 is rotated about the rotation protrusion, not shown, as the rotation center 25 by the swing boss 19 of the swing lever 18.
The method of mounting the double-headed toothbrush head of the present invention will be described below.
After the drive mechanism consisting of the connecting shaft 13, the connecting rod 4, the drive shaft 2 with the eccentric shaft 17, and the oscillating lever 18 is accommodated in the brush bar 1, the limiting member 3 is mounted. Then, the fitting portion of the cover plate 5 is fitted into the fitted portion of the brush bar 1, and the cover plate 5 is attached to the brush bar 1. The rear disk chucking groove 16 of the rear brush disk 6 is inserted into the chucking groove hole 5a of the cover plate 5, and the rear disk protrusion 61 of the rear brush disk 6 is fitted into the cover plate insertion hole 5b of the cover plate 5.
The front brush plate 7 is then installed.
A front pillar portion extending downward from the lower surface of the disk portion of the front brush disk 7 and having a smaller area than the cross-sectional area of the disk portion when projected in the vertical direction, and a front disk insertion hole 7a serving as a rotation center 24 of the front brush disk 7 are provided in the bottom of the front brush disk 7. The front brush disk 7 is mounted to the brush bar 1 by inserting the boss 8 into the front disk insertion hole 7a of the front brush disk 7, inserting the front disk rotation shaft 9 into the cylindrical hole of the brush bar 1 to be fixed, and inserting the front disk rotation shaft 9 into the boss 8. Finally, the at least two shaft elements 10, 10 are inserted after penetrating the brush bar 1 into the sliding grooves of the front brush plate 7, which are correspondingly provided in the front plate column part thereof. The upper and lower groove walls of each slide groove are in sliding contact with the inserted shaft member 10, and the shaft member 10 vertically limits the front brush disk 7 so as not to hinder the left-right rotation of the front brush disk 7. Further, a front disc stopper 7b may be formed above each of the slide grooves of the front disc column portion, respectively. The shaft member 10 is in sliding contact with the upper and lower groove walls of the chute and also in sliding contact with the lower surface of the front disc stopper 7b, so that the contact area of the shaft member 10 with the front brush disc 7 is increased, and the stability of the movement of the front brush disc 7 is further improved. Fig. 4 shows a pair of right and left pins as the shaft members 10, 10 as an example. A pair of pins are inserted into a pair of left and right sliding grooves formed in a front disc column portion of the front brush disc 7 from both left and right sides of a front end portion of the brush rod 1, and are always in sliding contact with the front brush disc 7 so as not to hinder the left and right rotation of the front brush disc 7 during the movement of the front brush disc 7, so that the stability of the front brush disc 7 during the movement can be ensured by the pair of pins. In fig. 8, the front disk stopper 7b is shown as a plate-like member, and the front disk stopper 7b extends in an involute shape from a front disk column portion of the front brush disk 7 when viewed in the vertical direction. However, the shape of the front disk stopper 7b is not limited thereto as long as it can keep sliding contact with the shaft member 10 during the movement of the front brush disk 7. In the example of fig. 4, one pin is attached to each of the left and right sides as the shaft member 10, but the number of the shaft members may be three or more, and the position of the shaft members may be arbitrary, and is not limited to the left and right sides.
The movement principle of the double-headed toothbrush head of the present invention will be explained below.
As described above, the front end of the propeller shaft 2 is provided with the eccentric shaft 17. The central axis of the eccentric shaft 17 is offset from the central axis of the propeller shaft 2, and the offset amount is referred to as eccentricity. When the drive shaft 2 is driven to perform a circumferential rotational motion, the eccentric shaft 17 performs a circular motion around the rotation center line O with an eccentricity as a radius as viewed along the extending direction of the rotation center line O. Since the up-and-down movement of the swing lever 18 is restricted, when the eccentric shaft 17 is inserted into the swing hole 22 at the rear end of the swing lever 18 and slides up and down along the hole wall in the swing hole 22, the rear end of the swing lever 18 is driven to move left and right in a plane by the eccentric shaft 17, so that the swing lever 18 pivotally supported swings left and right about the axis of its pivotally supporting portion. The swing shaft 20 on the front end side of the swing lever 18 and the swing boss 19 on the rear end side move in synchronization. Since the swing shaft 20 on the front end side of the swing lever 18 is inserted into the front disc slot hole 15 of the front brush tray 7 and is in sliding contact with the hole wall in the front disc slot hole 15, the front brush tray 7 is driven to rotate about the front disc insertion hole 7a in accordance with the movement of the swing shaft 20. Since the swing boss 19 on the rear end side of the swing lever 18 is inserted into the rear disc holder groove 16 so as to be slidable along the inner wall of the rear disc holder groove 16 of the rear brush 6, the rear brush 6 is driven to rotate left and right about the rotation center 25 of the rear brush 7 in accordance with the movement of the rear disc holder groove 16.
In fig. 9A and 9B, a top view and a cross-sectional view a-a of the double-headed toothbrush head in a neutral position, i.e., with the front and rear brush disks not being driven by oscillating lever 18, are shown, respectively. In the neutral position, as shown in fig. 9B, the front disk stopper 7B and/or the pin insertion hole of the front brush disk 7 are positioned in left-right symmetry with respect to the rotation center line O. Although not shown, the eccentric shaft 17 inserted into the swing hole 22 of the swing lever 18 at this time is positioned at the highest position or the lowest position in the vertical direction in the swing hole 22. When the motor 11 drives the transmission shaft 2 to rotate circumferentially around the rotation center line O via the connecting shaft 13 and the connecting rod 4, the eccentric shaft 17 makes a circular motion around the rotation center line O within a plane perpendicular to the rotation center line O due to being eccentric with respect to the transmission shaft 2. Further, since the vertical position of the swing hole 22 of the swing lever 18 for accommodating the eccentric shaft 17 is fixed and the eccentric shaft 17 is allowed to slide freely in the swing hole 22, the circular motion of the eccentric shaft 17 is converted into the left-right translation by the swing hole 22. The swing lever 18 pivotally supported by the rotation shaft 18a at the brush lever center hole 23 of the brush lever 1 is rotated about the rotation shaft 18a by the left-right translation of the swing hole 22 at the rear end portion thereof. The rear brush tray 6 is connected to the rear end of the swing lever 18 via the rear tray holding groove 16, and since the rear brush tray 6 is pivotally supported by the cover plate 5, the rear brush tray 6 is driven by the rear end of the swing lever 18 to rotate left and right about the rotation center 25 of the rear brush tray 6.
Fig. 10A and 10B are a plan view and a sectional view B-B, respectively, showing a state in which the rear brush tray 6 of the double-headed toothbrush head is rotated to the left. Fig. 11A and 11B show a plan view and a C-C sectional view, respectively, of the double-headed toothbrush head in a state where the rear brush disk 6 is rotated rightward. As shown in fig. 10B, the eccentric shaft 17 moves to the right, and the rear end of the swing lever 18 is translated to the right, so that the rear disc holder groove 16 of the rear brush disc 6 located at the rear side with respect to the rotation center 25 is driven by the rear end of the swing lever 18 to move to the right, and the rear brush disc 6 rotates counterclockwise about the rotation center 25 thereof. Although not shown, the front end of the swing lever 18 is simultaneously translated to the left, the front disk slot 15 of the front brush disk 7 located on the rear side with respect to the rotation center 24 is driven by the front end of the swing lever 18 to move to the left, and the front brush disk 7 rotates clockwise about the rotation center 24. In addition, as shown in fig. 11B, when the eccentric shaft 17 moves to the left, the rear brush disk 6 is driven to rotate clockwise by the swing lever 18, and the front brush disk 7 rotates counterclockwise.
The above detailed description of the embodiment of the double-ended toothbrush head of the present invention is given by way of example only. It is within the scope of the present invention for those skilled in the art to provide a double-headed toothbrush head and an electric toothbrush incorporating the same without departing from the spirit of the present invention by making appropriate changes, combinations and the like.
Claims (16)
1. A double-head toothbrush head comprises a brush rod (1), a front brush disk (7) and a rear brush disk (6), wherein the front brush disk (7) and the rear brush disk (6) are arranged at the front end part of the brush rod (1) in a front-back manner,
this double-end toothbrush head's characterized in that, it still includes:
a swing lever (18) pivotally supported at a front end portion of the brush lever (1),
the front brush disk (7) is driven by the front end of the swing rod (18) to rotate left and right around the rotation center (24) of the front brush disk (7),
the rear brush disk (6) is driven by the rear end of the swinging rod (18) to rotate left and right around the rotation center (25) of the rear brush disk (6);
a drive shaft (2) which is rotatably driven about a rotational center line (O) of the double-headed toothbrush head, the rotational center line (O) being a central axis of the double-headed toothbrush head in a front-rear direction;
an eccentric shaft (17) provided on the tip end side of the transmission shaft (2) so as to be eccentric with respect to the transmission shaft (2),
the oscillating lever (18) is driven to pivot by the eccentric shaft (17); and
a limiting component (3), the limiting component (3) is arranged on the brush rod (1) and is provided with an insertion hole for the transmission shaft (2) to penetrate through in a mode of freely rotating around the rotation center line (O),
the limiting part (3) is arranged on the transmission shaft (2) and close to the eccentric shaft (17).
2. A double-ended toothbrush head according to claim 1 wherein,
the double-headed toothbrush head comprises a cover plate (5) mounted to the front end of the brush bar (1) for supporting the rear brush plate (6).
3. A double-ended toothbrush head according to claim 1 or 2 wherein,
the double-headed toothbrush head comprises a rotating shaft (18a), the rotating shaft (18a) is positioned between the front end and the rear end of the oscillating lever (18),
the swing lever (18) is pivotable about the axis of the rotation shaft (18 a).
4. A double-ended toothbrush head according to claim 1 wherein,
the rear end of the swinging rod (18) is provided with a swinging hole (22) for inserting the eccentric shaft (17), and when the eccentric shaft (17) is driven to rotate around the rotation center line (O), the eccentric shaft (17) slides up and down along the hole wall of the swinging hole (22) in the swinging hole (22).
5. A double-ended toothbrush head according to claim 1 or 2 wherein,
the front end of the swing rod (18) is provided with a swing shaft (20),
the bottom of the front brush disc (7) is provided with a front disc slotted hole (15) for the swinging shaft (20) to insert,
the swinging shaft (20) can slide in the front disc slotted hole (15) along the hole wall of the front disc slotted hole (15), so that the front brush disc (7) is driven to rotate left and right.
6. A double-ended toothbrush head according to claim 1 or 2 wherein,
the double-head toothbrush head comprises a front disc rotating shaft (9) and a shaft sleeve (8),
the bottom of the front brush disc (7) is provided with a front disc insertion hole (7a),
one end of the front disc rotating shaft (9) is fixed on the brush rod (1), and the other end of the front disc rotating shaft is inserted into the front disc inserting hole (7a) through the shaft sleeve (8).
7. A double-ended toothbrush head according to claim 6 wherein,
the front disk rotating shaft (9) and the shaft sleeve (8) are made of metal.
8. A double-ended toothbrush head according to claim 1 or 2 wherein,
a swing boss (19) is formed above a swing hole (22) at the rear end of the swing rod (18),
the bottom of the rear brush disc (6) is provided with a rear disc clamping groove (16) for inserting the swing boss (19),
the swing boss (19) can slide in the rear disc clamp groove (16) along the groove wall of the rear disc clamp groove (16).
9. A double-ended toothbrush head according to claim 1 wherein,
also comprises a cover plate (5) which is arranged at the front end part of the brush rod (1),
and a cover plate bump (5e) for pressing the limiting component (3) is arranged on the rear end side of the cover plate (5).
10. A double-ended toothbrush head according to claim 1 wherein,
the double-ended toothbrush head comprises a front disc limiting member limiting the movement of the front brush disc (7) in a plane.
11. A double-ended toothbrush head according to claim 10 wherein,
the front disc stop member is at least two shaft members (10, 10),
the front brush disc (7) is provided with a front disc column part extending downwards on the lower surface of the disc part, and the front disc column part is provided with a sliding groove,
the at least two shaft members (10, 10) are inserted into the sliding groove after penetrating the front end part of the brush rod (1) in a freely rotatable manner,
the at least two shaft members (10, 10) are in sliding contact with the upper and lower groove walls of the chute during movement of the front brush disc (7).
12. A double-ended toothbrush head according to claim 11 wherein,
a front disc stop block (7b) is arranged above the sliding groove of the front disc column part,
the lower surface of the front disc stop block (7b) and the upper groove wall of the sliding groove are positioned in the same plane.
13. A double-ended toothbrush head according to claim 2 wherein,
at least one cover protrusion (5d) is formed on the upper surface of the cover (5).
14. A double-ended toothbrush head according to claim 2 wherein,
the front end part of the cover plate (5) is provided with a cover plate front opening (5c) for accommodating the front brush disc (7).
15. A double-ended toothbrush head according to claim 14 wherein,
the left and right opening widths of the cover front opening (5c) gradually increase toward the front.
16. An electric toothbrush having a double-ended toothbrush head as claimed in any one of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710312875.9A CN106901858B (en) | 2017-05-05 | 2017-05-05 | Double-head toothbrush head and electric toothbrush provided with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710312875.9A CN106901858B (en) | 2017-05-05 | 2017-05-05 | Double-head toothbrush head and electric toothbrush provided with same |
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| Publication Number | Publication Date |
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| CN106901858A CN106901858A (en) | 2017-06-30 |
| CN106901858B true CN106901858B (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710312875.9A Active CN106901858B (en) | 2017-05-05 | 2017-05-05 | Double-head toothbrush head and electric toothbrush provided with same |
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| CN2610865Y (en) * | 2003-02-26 | 2004-04-14 | 林辉明 | Electronic toothbrush with double bristle |
| CN1268302C (en) * | 2003-09-25 | 2006-08-09 | 林辉明 | Dual-head electric toothbrush |
| DE20321083U1 (en) * | 2003-12-20 | 2005-11-17 | Aghakhani, Ali | Electric toothbrush, with a brush head rotating around 360degrees, has a manual switch to change the direction of rotation |
| CN2681701Y (en) * | 2003-12-23 | 2005-03-02 | 林辉明 | Double head electric tooth brush |
| CA2579039C (en) * | 2004-09-07 | 2011-05-10 | The Procter & Gamble Company | Electric toothbrushes |
| CN201042465Y (en) * | 2007-06-01 | 2008-04-02 | 叶万青 | Electric tooth-bush head |
| CN201275155Y (en) * | 2008-10-14 | 2009-07-22 | 天津市中环三峰电子有限公司 | Double head electric tooth brush |
| CN103654987B (en) * | 2012-09-26 | 2016-08-03 | 沃辉有限公司 | Electric toothbrush head and electric toothbrush |
| CN203280524U (en) * | 2013-05-30 | 2013-11-13 | 居扣成 | Electric toothbrush |
| KR101428934B1 (en) * | 2013-07-19 | 2014-08-08 | 구대회 | Electric toothbrush with gum massage |
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|---|---|---|---|---|
| CN1528251A (en) * | 2003-09-25 | 2004-09-15 | 林辉明 | Vertical-brushing dual-head electric toothbrush |
| CN202233725U (en) * | 2011-08-22 | 2012-05-30 | 南京信息工程大学 | Toothbrush with rotatable double ends |
| CN203898478U (en) * | 2014-02-18 | 2014-10-29 | 程耕莘 | Electric toothbrush with 360-degree high-speed rotation capacity |
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| CN106901858A (en) | 2017-06-30 |
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