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CN-121987375-A - Switching mechanism of electric toothbrush and working method thereof

CN121987375ACN 121987375 ACN121987375 ACN 121987375ACN-121987375-A

Abstract

The invention relates to a switching mechanism of an electric toothbrush and a working method thereof, wherein the switching mechanism of the electric toothbrush comprises a toothbrush main body (3) with a servo motor (1) and a motor shaft (2) arranged inside, the toothbrush main body (3) is detachably connected with a plurality of brush heads, the outer end part of the motor shaft extends out of the toothbrush main body, the brush heads are sleeved on the periphery of the motor shaft extending out of the toothbrush main body (3), a mandrel (6) capable of sliding relatively axially is arranged in the center of the motor shaft (2), convex parts (9) with different lengths are arranged inside the brush heads, the convex parts (9) can push the mandrel (6) to move along the axial direction for different lengths, and a sensing triggering device which controls the servo motor (1) to output different working modes through different displacements of the mandrel (6) is arranged in the toothbrush main body (3). The switching mechanism of the electric toothbrush is reasonable in design and is beneficial to convenient use.

Inventors

  • YE ZIJIE
  • ZHENG ZIXIAN

Assignees

  • 福州牙宜生口腔科技有限公司

Dates

Publication Date
20260508
Application Date
20260313

Claims (10)

  1. 1. A switching mechanism of an electric toothbrush is characterized by comprising a toothbrush main body (3) with a servo motor (1) and a motor shaft (2) arranged inside, wherein a plurality of brush heads are detachably connected to the toothbrush main body (3), the outer end part of the motor shaft extends out of the toothbrush main body, the brush heads are sleeved on the periphery of the motor shaft extending out of the toothbrush main body (3), a mandrel (6) capable of sliding relative to the axial direction is arranged in the center of the motor shaft (2), protruding parts (9) with different lengths are arranged inside the brush heads, the protruding parts (9) can push the mandrel (6) to move along the axial direction for different lengths, and a sensing trigger device which controls the servo motor (1) to output different working modes through different displacements of the mandrel (6) is arranged in the toothbrush main body (3).
  2. 2. The switching mechanism of an electric toothbrush according to claim 1, wherein the brush head is at least two of a swing brush head (4), an acoustic wave broom bestir, and a rotary brush head (19).
  3. 3. The switching mechanism of the electric toothbrush according to claim 1, wherein the sensing trigger device is a touch switch (7) which is arranged in the toothbrush main body (3) and is triggered by pressing the inner end of the mandrel, the rotary swinging brush head (4) is sleeved on the periphery of the motor shaft (2), a rotary swinging mechanism (8) which is driven by the motor shaft to act is arranged in the rotary swinging brush head, rotary swinging bristles (9) on the rotary swinging brush head are driven by the rotary swinging mechanism to act, the convex part (9) which can push the mandrel to move axially to conduct the touch switch (7) is arranged in the rotary swinging mechanism (8), the sound wave sweeping bestir is sleeved on the periphery of the motor shaft, and the convex part arranged in the sound wave sweeping bestir head (5) drives the mandrel to move axially to zero.
  4. 4. The switching mechanism of an electric toothbrush according to claim 3, wherein the touch switch (7) is mounted on a supporting plate (10), a rebound member (11) is arranged above the supporting plate, and the middle part of the rebound member is mounted at the inner end of the mandrel.
  5. 5. The switching mechanism of the electric toothbrush according to claim 1 or 2, wherein the sensing triggering device is a pressure sensor (20) which is arranged in the toothbrush main body (3) and is triggered by pressing the inner end of the mandrel, the convex part (9) capable of pushing the mandrel (6) to axially move by different lengths is arranged in the brush head, a spring (21) is arranged at the inner end of the mandrel (6), the spring (21) is contacted with the pressure sensor (20) when the mandrel (6) axially moves, the pressure sensor (20) receives different pressures to identify the brush head, and the controller controls the servo motor to output different working modes to drive the corresponding brush head to work.
  6. 6. The switching mechanism of an electric toothbrush according to claim 5, wherein the pressure sensor (20) is mounted on the support plate (10), a soft gel (22) is mounted above the spring (21), the soft gel (22) is in contact with the pressure sensor (20) when the spindle (6) moves axially, and the pressure sensor (20) receives different pressures to identify the mounted brush head.
  7. 7. The switching mechanism of the electric toothbrush according to claim 1 or 2, wherein the sensing triggering device comprises a magnet (23) and a Hall sensor (24) which are arranged in the toothbrush main body (3), the magnet (23) is arranged at the inner end of the mandrel (6), the Hall sensor (24) is arranged at the position corresponding to the magnet (23) in the toothbrush main body (3), the protruding part (9) capable of pushing the mandrel (6) to axially move by different lengths is arranged in the brush head, the installed brush head is identified through induction current generated by the magnet (23) at the inner end of the mandrel (6) and the Hall sensor (24), and the controller controls the servo motor to output different working modes to drive the corresponding brush head to work.
  8. 8. The switching mechanism of an electric toothbrush according to claim 3, wherein the toothbrush main body is provided with a D-shaped bulge (12), the inner circumferences of the end heads of the shell of the rotary brush head (4) and the rotary brush head (19) are matched with the D-shaped bulge so that the shell of the rotary brush head (4) or the rotary brush head (19) cannot rotate along with the rotation of a motor shaft, and the inner circumference of the end head of the sound wave sweeper bestir is circular so that the shell of the sound wave sweeper bestir can vibrate at the same frequency and rotate reciprocally around the motor shaft in a small amplitude when being matched with the D-shaped bulge in a sleeved mode.
  9. 9. The switching mechanism of the electric toothbrush according to claim 3, wherein the motor shaft is provided with a limit groove (13), and convex keys (14) matched with the limit groove are arranged inside the rotary brush head (4), the sound wave scanning bestir head (5) and the rotary brush head (19), so that the rotary brush head (4), the sound wave scanning bestir head (5) and the rotary brush head (19) cannot axially move through the matching of the convex keys and the limit groove.
  10. 10. A method of operating a switching mechanism for an electric toothbrush according to claims 1-9, characterized in that: When a certain brush head is arranged on the toothbrush main body (3), a convex part (9) in the brush head can push the mandrel (6) to generate displacement along the axial direction, the sensing trigger device is triggered by the mandrel (6), and the sensing trigger device controls the servo motor (1) to output different working modes through the controller, so that different working modes of the arranged brush head are realized. The convex part pushes the mandrel to axially move so as to conduct the point touch switch, so that the servo motor outputs a rotary swing mode to drive the rotary swing brush head to work, and when the sound wave scanning bestir head is installed, the mandrel is not driven to axially move, and the point touch switch is not conducted, so that the servo motor outputs a sound wave scanning mode to drive the sound wave scanning bestir head to vibrate at high frequency and rotate in a small amplitude in a reciprocating manner around a motor shaft; or the different brush heads push the core shaft on the toothbrush main body to axially move for different lengths through the convex parts with different lengths on the different brush heads, the different brush heads enable the springs to compress for different lengths, so that the springs bring different pressures to the pressure sensors, the controller senses the different pressures of the pressure sensors, and the controller controls the servo motor to output different working modes to drive the corresponding brush heads to work; Or convex parts with different lengths on different brush heads are used for pushing the mandrel to axially move for different lengths, so that different distances between the magnets on different brush heads and the Hall sensor are generated, and different installed brush heads are identified by sensing different current values of the Hall sensor through the controller so as to control the servo motor to output different working modes to drive the corresponding brush heads to work.

Description

Switching mechanism of electric toothbrush and working method thereof Technical Field The invention relates to a mechanism on a two-in-one or three-in-one electric toothbrush, in particular to a switching mechanism of an electric toothbrush and a working method thereof. Background The electric toothbrush in the market at present adopts the technical proposal of brush head in sound wave vibration mode, brush head in rotary swing mode or polishing mode, etc. The acoustic wave mode and the swing mode have the following advantages and disadvantages: The acoustic Mode (Sonic Mode) has the advantages of 1, excellent fluid cleaning effect, which is the greatest advantage. Through high-frequency vibration of more than 31,000 times per minute, toothpaste and water in the oral cavity are driven to form high-speed micro-flow, and 'blind areas' where bristles such as tooth gaps, gingival sulcus and the like are difficult to directly touch can be effectively flushed. Has important significance for preventing dental caries (dental caries) and periodontal disease. 2. The gum and enamel are milder, so long as the method of use is correct (no forced pressing is required), the physical friction is relatively small, and the irritation to the gum and the abrasion of the enamel are theoretically lower than those of a rotary type. Is more suitable for people with sensitive gums, orthodontic (tooth socket wearing), enamel hypoplasia or wedge-shaped defects. 3. The use experience is easier to adapt, mainly high-frequency vibration sense is achieved, no obvious mechanical pulling sense is achieved, and the use experience is acceptable for most people for the first time. The disadvantage of Sonic Mode (Sonic Mode) is that 1, plaque removal efficiency may be somewhat lower and that for large area, adherent plaque on the tooth surface, it may not rely on "water flow cleaning" as fast and efficient as rotary direct "mechanical abrasion". It is necessary to move the brush head more carefully to cover each tooth surface. 2. The brushing technique has certain requirements that the brush head is required to be aligned with the gingival sulcus at an angle of 45 degrees and slowly moves along the dentition, so that the 'water flow effect' is fully exerted. If merely a mess vibrates on the tooth surface, the cleaning effect is greatly compromised. 3. Noise is often harsher at higher frequencies. The swing mode (Oscillating-Rotating Mode) has the advantages of 1 and strong physical friction cleaning force, which is a core advantage. The brush head swings back and forth for thousands to tens of thousands times along the length direction of the brush head every minute, so that a direct and efficient friction effect is generated on the tooth surface, and the brush head has very obvious effect on cleaning dental plaque, soft scale and surface coloring (such as tea stain and coffee stain) and high efficiency. 2. The brushing "feel" is more pronounced in that the explicit mechanical action gives the user psychological and physical feedback that "being cleaned hard" and the experience is good for those who like this thorough feel. 3. The round brush head is designed in such a way that the small round heads can wrap teeth one by one more easily, especially the rear groove teeth, and the operation flexibility is high, and the concept of 'one brush one by one' in the 'Papanicolaou brushing method' can be more met. Disadvantages of the swing mode (Oscillating-Rotating Mode) 1, The potential irritation to gums and teeth is greater, if the user presses habitually, the swinging motion can cause greater scraping and impact on the gums, possibly causing the gums to recede. It is also not friendly enough to exposed roots or worn necks. 2. Gap cleaning relies on the bristles themselves, the cleaning action of which mainly occurs in the areas where the bristles are in direct contact, and for cleaning deep in the crevices, mainly relies on the entry of the bristles, lacking the auxiliary effect of acoustic wave type "water flow impingement". 3. Initial use may require adaptation to the "tractor" or "tingling" sensation in the mouth, which some people initially find uncomfortable. The brush head core mechanism in the polishing mode is that the brush hair component continuously rotates in a certain direction, and has the advantages of higher whitening efficiency and smaller damage to tooth surfaces, and has the defects of being effective only on exogenous pigments such as coffee stains, tea stains and the like and limited in improving endogenous dental jaundice such as tetracycline teeth, fluoridated teeth and the like. To combine the two or three modes, the customer can select different modes to brush according to the requirement of brushing teeth. For the sound wave vibration toothbrush, the motor drives the whole brush head to swing and the rotary vibration toothbrush drives the toothbrush head internal mechanism to drive the brush hair to swing, and the brush h