WO2004098444A1 - Brosse a dents electrique - Google Patents

Brosse a dents electrique Download PDF

Info

Publication number
WO2004098444A1
WO2004098444A1 PCT/CN2004/000407 CN2004000407W WO2004098444A1 WO 2004098444 A1 WO2004098444 A1 WO 2004098444A1 CN 2004000407 W CN2004000407 W CN 2004000407W WO 2004098444 A1 WO2004098444 A1 WO 2004098444A1
Authority
WO
WIPO (PCT)
Prior art keywords
bevel gear
blind hole
brush body
shaft
pin
Prior art date
Application number
PCT/CN2004/000407
Other languages
English (en)
Chinese (zh)
Inventor
Xiaoguo Dai
Original Assignee
Xiaoguo Dai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiaoguo Dai filed Critical Xiaoguo Dai
Publication of WO2004098444A1 publication Critical patent/WO2004098444A1/fr

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Classifications

    • 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

Definitions

  • the utility model relates to an electric toothbrush, in particular to a connection mechanism of a body part of an electric toothbrush. Background technique
  • Existing electric toothbrushes generally include a grip portion and a brush body portion, and the brush body portion is detachably connected to the grip portion.
  • the motor installed in the grip part drives the transmission shaft through a driving mechanism, and the brush body part is provided with a rotatable shaft and a rotatable bristle holder.
  • the above-mentioned transmission shaft is connected with Connected at the bottom.
  • the upper end of the rotating shaft of the brush body is connected to the bristle holder through another connecting mechanism.
  • the US patent US-PS 4156620 discloses a mechanism for connecting a brush body part of an electric toothbrush with a bristle holder.
  • the brush body has a rack link, and each bristle seat of the bristle holder is provided with a gear. All gears in a row of brush holders mesh with each other, and one of every two gears meshes with a connecting rod. When the link moves back and forth, the adjacent bristle holders can rotate in opposite directions to each other. Because there are many gears, and the connecting rod is a rack, the structure is complicated and the volume increases. To prevent the gears from getting stuck, the allowable manufacturing tolerances are small, resulting in high manufacturing costs. Failure to achieve the required manufacturing accuracy may result in malfunction. Furthermore, the rack-and-pinion transmission has the disadvantage of large power loss.
  • US patent US-PS 4827550 also discloses a mechanism for connecting an electric toothbrush drive shaft and a brush body rotating shaft, wherein an end of the drive shaft adjacent to the brush body rotating shaft has a ring-shaped recessed area, the recessed area is close to the drive shaft. End, thereby forming a tip and a shoulder facing the upper end of the grip portion.
  • the tip is tapered at the end of the drive shaft to facilitate insertion into the shaft of the brush body. Because the volume of the brush body is small, it takes time to process such a tapered tip and shoulder structure, so the production cost is increased.
  • US patent US-PS 4827550 and Chinese patent publication number CN 1044041A both disclose the use of a gear as a driving mechanism to drive a transmission shaft.
  • this drive device The installation structure is complicated, the power loss is large, so it consumes a lot of power, the transmission efficiency is low, and it is not economical.
  • the technical problem to be solved by the present utility model is to try to overcome the complicated structure of the connecting mechanism between the rotating shaft of the electric toothbrush brush body and the bristle holder. Difficult processing and high cost;
  • the connecting mechanism between the transmission shaft and the brush body rotating shaft is complicated in structure, difficult to process, and high in cost;
  • the brush body has the disadvantages of unstable rotation, large power loss, large volume, and inconvenience, and provides a small, Electric toothbrush with simple structure, convenient processing and disassembly, smooth rotation of the brush body, low power consumption, low price and convenient use.
  • one end of the hollow support tube remote from the grip portion is a pot-shaped mounting portion that is open to one side, and is used to install a driving bevel gear, a driven bevel gear, and a bristle holder.
  • a blind hole is opened at the end of the rotating shaft of the brush body away from the handle. The center of the blind hole is located on the axis of the rotating shaft.
  • One end of a connecting pin is coaxially tightly inserted into the blind hole.
  • the other end of the connecting pin is coaxially equipped with a driving bevel gear, and the connecting pin is closely matched with the driving bevel gear.
  • a fixing pin is inlaid on the side wall of the pot-shaped mounting portion of the hollow support tube, and both the bristle holder and the driven bevel gear are rotatably coaxially mounted on the fixing pin.
  • the driving bevel gear and the driven bevel gear mesh with each other.
  • the center angle of the driving bevel gear and the driven bevel gear is less than or equal to 90 °.
  • a groove parallel to the gear axis can also be machined on the side of the driven gear, and a protruding portion parallel to the axis of the bristle holder is protruded from the end face of the bristle holder at the end mating with the driven gear.
  • the two adjacent end faces of the driven bevel gear and the bristle holder are installed parallel to each other, so that the bristle holder and the driven bevel gear are synchronously rotated.
  • a groove can also be machined on the outer wall of one side of the bristle holder, and a restriction pin is inserted into the above four grooves.
  • the other end of the restriction pin is fixed to the top wall of the pot-shaped mounting portion of the hollow support tube. , Can make the bristle holder limited movement along the axial direction of the fixed shaft.
  • a blind hole may be provided at the end of the inner surface of the brush body that is in contact with the handle part, and an outward protrusion is provided along the radial side of the hole. At the center of the hole, at least one inward protrusion is provided on the side of the hole opposite to the above side.
  • the handle interface corresponding to the outward protrusion of the blind hole also has an outward protrusion that matches the outward protrusion, and at least one inward protrusion that matches the inward protrusion of the blind hole on the opposite side.
  • the diameter of the grip interface is smaller than the diameter of the middle hole in the brush body.
  • an end surface of the brush body rotating shaft that cooperates with the transmission shaft is machined
  • a blind hole extending in the axial direction of the rotating shaft toward the inside of the rotating shaft and having a cross-section in the shape of a round head screw, the round head of the blind hole is divided into an arc larger than a semicircle.
  • the end of the transmission shaft near the end of the rotating shaft of the brush body is inserted into the blind hole, and the transmission shaft is directly connected to the rotating shaft of the brush body.
  • the utility model also has a structure that the driving mechanism for connecting the motor and the transmission shaft includes a motor driving wheel connected to the motor shaft, an eccentric pin with a longitudinal axis parallel to the longitudinal axis of the driving wheel and eccentric with respect to the driving wheel, and One end of which is closely matched with the drive shaft and has a slot at the other end.
  • One end of the eccentric pin is embedded in the driving wheel, and the other end is inserted into the slot of the fork.
  • the utility model adopts a bevel gear transmission with a center angle less than or equal to 90 °, the volume of the brush body is reduced, and space is saved; one end of the transmission shaft is directly connected to the shaft of the brush body, and the other end is connected to the motor through a fork pin structure. Reduced power loss and improved transmission efficiency; The two sides of the interface between the brush body lining and the grip part are connected by a concave and convex structure, the brush body is easy to install and remove, and the brush body rotates more smoothly; and because the bevel gear can be processed by casting or injection molding It is easy to process, improves efficiency and saves costs.
  • FIG. 1 is a schematic longitudinal sectional view of the electric toothbrush according to the present invention.
  • FIG. 2 is a schematic longitudinal sectional view of a brush body portion of the electric toothbrush
  • Figure 3a is a schematic longitudinal sectional view of a driven bevel gear
  • Figure 3b is a schematic side view of a driven bevel gear:
  • Figure 4a is a schematic longitudinal sectional view of a bristle holder
  • Figure 4b is a schematic side view of a bristle holder
  • Figure 5a is a schematic longitudinal sectional view of a brush inner liner
  • 5b is a sectional view taken along the line C-C in FIG. 5a;
  • Figure 7a is a schematic longitudinal sectional view of a brush body rotating shaft mating end with a transmission shaft
  • FIG. 7b is a cross-sectional view taken along G_G of FIG. 7a;
  • Figure 8a is a schematic front view of a transmission shaft and a fork mounted thereon;
  • Figure 8b is a side view of Figure 8a
  • Figure 8c is a top view of Figure 8a
  • FIG. 9 is a connection schematic diagram of a motor driving mechanism and a transmission shaft.
  • the same reference numerals in the drawings denote the same components. detailed description
  • FIG. 1 is a schematic longitudinal sectional view of the electric toothbrush according to the present invention.
  • the electric toothbrush according to the present invention includes a grip portion 22 and a brush body portion 1, and the grip portion 22 includes a transmission shaft 11, a grip housing 12. 12, a driving mechanism 13, a motor 15, and a battery 17.
  • Fig. 2 is a schematic longitudinal sectional view of the electric toothbrush brush body portion 1.
  • the brush body part 1 includes a hollow support tube 2 in which a brush body rotating shaft 4 is installed.
  • the rotating shaft 4 is connected to the motor driving mechanism 13 installed in the grip portion 22 through the transmission shaft 11 and the motor driving mechanism 13 and the motor 15 Connected (see Figure 1). After the power is turned on, the motor 15 rotates and drives the transmission shaft 1 1 through the driving mechanism 13 so that the rotating shaft 4 reciprocates.
  • the rotation direction is shown by the double-headed arrow A in the figure.
  • One end of the hollow support tube 2 remote from the handle portion 22 is a pot-shaped mounting portion 21 which is open to one side, and is used to install a driving bevel gear 6 and a driven bevel gear 7 and a bristle holder 9.
  • a blind hole is opened at the end of the rotating shaft 4 of the brush body away from the handle. The center of the blind hole is located on the axis of the rotating shaft 4.
  • One end of the connecting pin 5 is coaxially tightly inserted into the blind hole, that is, the connecting pin 5 Can neither rotate nor move relative to the axis of rotation 4.
  • the other end of the connecting pin 5 is coaxially provided with a driving bevel gear 6.
  • the connecting pin 5 is closely fitted with the driving bevel gear 6, that is, the gear 6 can neither rotate nor move relative to the connecting pin 5.
  • a fixing pin 8 is inlaid on the side wall of the pot-shaped mounting portion 21 of the hollow support tube 2 of the brush body portion 1, and the bristle holder 9 is rotatably mounted coaxially on the fixing pin 8.
  • the driven bevel gear 7 also cooperates in a dynamic manner. It is coaxially mounted on the fixed pin 8, that is, the driven gear 7 can rotate or move relative to the fixed pin 8.
  • the above-mentioned driving bevel gear 6 and driven bevel gear 7 mesh with each other.
  • the center angles of the driving bevel gear 6 and the driven bevel gear 7 are less than or equal to 90 ° (see FIG. 3b).
  • the bristle holder 9 is rotatably mounted coaxially on the fixing pin 8.
  • the angle of rotation of the bristle holder 9 can be increased or decreased by selecting the center angle of the bevel gears 6, 7 described above.
  • Materials suitable for manufacturing the bevel gear include metal and plastic, and the bevel gear can be processed by casting or injection molding.
  • FIG. 3 a is a schematic longitudinal sectional view of the driven bevel gear 7;
  • FIG. 3 b is a schematic side view of the driven bevel gear 7.
  • a groove 311 parallel to the axis of the gear can be machined on the driven gear 7 side-sliding radially, and a parallel to the bristle holder 9 can be protruded from the end surface of the bristle holder 9 mating with the driven gear 7
  • a protruding portion 411 of the axis see FIG.
  • Fig. 4a is a schematic longitudinal sectional view of the bristle holder 9;
  • Fig. 4b is a schematic side view of the bristle holder 9;
  • a groove 412 is machined on the outer wall of the bristle holder 9 side, and a restriction pin 10 is inserted into the groove 412.
  • the other end of the restriction pin 10 is fixed to the top wall of the pot-shaped mounting portion 21 of the hollow support tube 2. In this way, with this structure, the bristle holder 9 can be limitedly moved in the axial direction of the fixing pin 8.
  • Fig. 5a is a schematic longitudinal sectional view of the brush inner liner 3; Fig. 5b is a C-C sectional view of Fig. 5a; and Fig. 6 is a top view of the handle interface 20.
  • a blind hole 511 is provided at the end of the brush body village 3 connected to the handle portion 22, and an outward protrusion 512 is provided along one side of the radial direction of the hole 511, and the protrusion 512 is located at the center of the hole 511.
  • the side opposite to the above side of 511 is provided with at least one inward protrusion 513 (see Figs. 5a and 5b).
  • the corresponding side of the handle interface 20 corresponding to the outward protrusion 512 of the blind hole 511 also has an outward protrusion 612 that matches the outward protrusion 512, and at least one inward protrusion 513 that matches the blind hole 511 on the opposite side.
  • the matching inward projection 613 (see Figure 6).
  • the diameter of the grip interface 20 is smaller than the diameter of the blind hole 511 in the inner liner 3 of the brush.
  • an inward protrusion 513 may also be provided on the above-mentioned opposite side of the blind hole 511, and in addition to the inward protrusion 613 that is matched with the inward protrusion 513 of the blind hole 511, the grip interface 20 is further provided with an inward protrusion
  • the inward protrusions 613 are longitudinally aligned with the inward protrusions 614. Since the inner side of the brush body 3 and the two sides of the handle part interface 20 are connected by a concave and convex structure (512, 513, 612, 613, 614), the volume of the toothbrush is reduced, the brush body is easy to install and disassemble, and the brush body rotates more smoothly.
  • Fig. 7a is a schematic longitudinal sectional view of the mating shaft 4 of the brush body at the mating end with the transmission shaft 11;
  • Fig. 7b is a sectional view taken along the line G-G of Fig. 7a.
  • an end surface of the brush body rotating shaft 4 that cooperates with the driving shaft 11 is processed to extend along the axial direction of the rotating shaft 4 toward the inside of the rotating shaft 4 and has a cross section of: A blind hole 7if in the shape of a round head screw, and a round portion 712 of the blind hole 7if has an arc shape larger than a semicircle, and an end of the transmission shaft 11 matched with the blind hole 7if is directly inserted into the blind hole 711.
  • FIG. 8a is a schematic front view of a transmission shaft 11 and a shift fork 19 mounted thereon;
  • Fig. 8b is a view of Fig. 8a
  • Figure 8c is a top view of Figure 8a.
  • FIG. 9 is a connection diagram of the motor driving mechanism 13 and the transmission shaft 11.
  • the driving mechanism 13 connecting the motor 15 and the transmission shaft 11 includes a motor driving wheel 14 connected to the shaft of the motor 15, and an eccentric pin 18 having a longitudinal axis parallel to the longitudinal axis of the driving wheel 14 and eccentric with respect to the driving wheel 14. One end is in close contact with the drive shaft 11 and the other end is a fork 19 with a slot 819.
  • One end of the eccentric pin 18 is embedded in the driving wheel 14 and the other end is inserted into the slot 819 of the fork 19 (Fig. 9). .
  • the driven gear 7 is driven to mesh with the driven gear 7 through the driving gear 6, so that the bristle holder 9 reciprocates in the direction shown by the bidirectional arrow B (FIG. 1 or 2). Due to the restriction pin 10, the bristle holder 9 can be limitedly moved along the axial direction of the fixing pin 8.

Landscapes

  • 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

L'invention concerne une brosse à dents électrique dont le corps (1) est composé d'un tuyau de support creux (2), d'une partie de montage présentant une forme creuse et située sur l'une des extrémités du tuyau, ainsi que d'une tige rotative (4) située dans le tuyau (2). Un orifice aveugle se trouve sur l'extrémité supérieure de la tige rotative (4) et le centre de cet orifice aveugle est situé sur les axes de cette tige rotative (4). Une broche d'accouplement (5) est insérée dans l'orifice aveugle à une extrémité de façon coaxiale et exempte de jeu et l'autre extrémité de cette broche d'accouplement (5) est accouplée à un engrenage conique (6) coaxial et sans jeu. Une paroi latérale est située sur la partie de montage creuse (21) du tuyau (2) et une broche de fixation (8) est implantée dans ladite paroi. Le support de brosse (9) et l'engrenage conique mené (7) placés sur le même axe sur la broche de fixation, peuvent être mis en rotation. L'engrenage conique de commande (6) et l'engrenage conique mené (7) sont placés en épaulement l'un par rapport à l'autre et leur angle médian est inférieur à 90°.
PCT/CN2004/000407 2003-05-09 2004-04-27 Brosse a dents electrique WO2004098444A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN03257119.4 2003-05-09
CNU032571194U CN2609520Y (zh) 2003-05-09 2003-05-09 电动牙刷

Publications (1)

Publication Number Publication Date
WO2004098444A1 true WO2004098444A1 (fr) 2004-11-18

Family

ID=32857044

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2004/000407 WO2004098444A1 (fr) 2003-05-09 2004-04-27 Brosse a dents electrique

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Country Link
CN (1) CN2609520Y (fr)
WO (1) WO2004098444A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102920520A (zh) * 2012-11-30 2013-02-13 杭州博达设计咨询有限公司 全方位电动牙刷
US9439741B2 (en) 2014-03-14 2016-09-13 Ranir, Llc Replacement brush head for an electric toothbrush
US10470858B2 (en) 2017-07-11 2019-11-12 Js Holding Inc. Removable brush head for an electric toothbrush
US11553999B2 (en) 2017-03-31 2023-01-17 Trisa Holding Ag Electrical body care brush

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2212570A (en) * 1987-11-16 1989-07-26 Si Hoe Kok Soon Gear mechanism
US5054149A (en) * 1988-07-14 1991-10-08 Si Hoe Kok S Electric toothbrush
CN2173044Y (zh) * 1993-12-03 1994-08-03 龙碧庭 带电装置的滚动式牙刷
JPH08356A (ja) * 1994-06-20 1996-01-09 Seikosha Co Ltd 電動歯ブラシ
CN2223983Y (zh) * 1995-05-25 1996-04-10 涂福来 可放大转动角度的电动牙刷
CN2223981Y (zh) * 1995-04-14 1996-04-10 徐春光 平面旋转电动牙刷
JPH08103331A (ja) * 1994-10-03 1996-04-23 Rozensutaa Kk 電動式歯ブラシ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2212570A (en) * 1987-11-16 1989-07-26 Si Hoe Kok Soon Gear mechanism
US5054149A (en) * 1988-07-14 1991-10-08 Si Hoe Kok S Electric toothbrush
CN2173044Y (zh) * 1993-12-03 1994-08-03 龙碧庭 带电装置的滚动式牙刷
JPH08356A (ja) * 1994-06-20 1996-01-09 Seikosha Co Ltd 電動歯ブラシ
JPH08103331A (ja) * 1994-10-03 1996-04-23 Rozensutaa Kk 電動式歯ブラシ
CN2223981Y (zh) * 1995-04-14 1996-04-10 徐春光 平面旋转电动牙刷
CN2223983Y (zh) * 1995-05-25 1996-04-10 涂福来 可放大转动角度的电动牙刷

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102920520A (zh) * 2012-11-30 2013-02-13 杭州博达设计咨询有限公司 全方位电动牙刷
CN102920520B (zh) * 2012-11-30 2015-05-13 杭州纽乐科技有限公司 全方位电动牙刷
US9439741B2 (en) 2014-03-14 2016-09-13 Ranir, Llc Replacement brush head for an electric toothbrush
US10123609B2 (en) 2014-03-14 2018-11-13 Ranir, Llc Replacement brush head for an electric toothbrush
US11553999B2 (en) 2017-03-31 2023-01-17 Trisa Holding Ag Electrical body care brush
US10470858B2 (en) 2017-07-11 2019-11-12 Js Holding Inc. Removable brush head for an electric toothbrush

Also Published As

Publication number Publication date
CN2609520Y (zh) 2004-04-07

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